The machine has a layout with a moving grinding headstock in the transverse direction, longitudinal movement of the workpiece headstock relative to the axis of the grinding wheel and rotation of the headstock spindle of the workpiece. The workpiece is installed in the headstock chuck. It is possible to install a support rest on the machine table. The installation of the part is carried out manually.
The movement of all working bodies is carried out by means of ball screws.
The base of the machine is a frame on which the main components and mechanisms are installed. A longitudinal table is installed on the rolling guides of the frame. On the guides of the transverse traverse - the table is transverse, and also fixedly fixed:
- mechanisms of longitudinal and transverse movements;
- mechanism for limiting longitudinal movements;
- reference mechanism and limitation of lateral movements
- fencing of the working area.
The transverse table provides transverse movement of the headstock of the grinding spindle installed on it. Movement is carried out on hardened steel linear rolling guides by means of a backlash-free high-precision ball screw.
The dressing of the periphery of the grinding wheel is carried out with a diamond in a frame, the dressing device is fixed on a longitudinal table.
Surface treatment and dressing of the grinding wheel is carried out in automatic mode according to the control program, the installation and removal of the part is carried out manually. The machine automatically compensates for the amount of removal of the profile of the grinding wheel when dressing.
A longitudinal table moves on the rolling guides, which carries out an oscillatory oscillatory movement with the possibility of a stepless and precise approach. An upper rotary table is installed on the longitudinal table. On the working surface of the longitudinal table, the headstock of the product and the supporting lunette are installed. The top table can be rotated in the horizontal plane by an angle of ±2°. The headstock of the product can be rotated at an angle of -7°…+8°.
To install parts, a hydraulic three-jaw self-centering chuck with replaceable jaws can be used.
The hydraulic lubrication station and coolant tank are installed behind the machine.
The working zone of grinding is enclosed by a cabinet-type protection, the front wall of the protection has a movable opening door with plexiglass.
In front, on the right of the machine, there is a control panel of the CNC system. The Sinumerik 802Dsl CNC system from Siemens must provide the following machine capabilities:
- processing of the part due to the rotation of the workpiece and the movement of the grinding headstock;
- maintaining the specified value of the cutting speed and the specified frequency of rotation of the workpiece.
For the convenience of the operator, a universal technological program is installed on the machine. In dialog mode, using special "masks", the operator sets:
- dimensions of the treated surface;
- removable allowance;
- finishing allowance;
- values of roughing and finishing feeds and speeds;
- the number of nursing;
- parameters and number of edits of the grinding wheel during processing.
Manufacturer of internal grinding machine 3M227VF2 - Saratov machine-tool plant named after V.I. 60th anniversary of the USSR, CVD founded in 1940.
Features of internal grinding
Internal grinding is one of the main methods of finishing holes, in which, depending on the grinding modes and the characteristics of the grinding wheel, machining accuracy of 1-3 class and surface roughness V7-V9 can be achieved.
The advantage of the internal grinding process is the ability to correct the drift of the hole axis formed in previous operations, as well as ensuring the perpendicularity of the end surface to the axis of the hole, achieved when grinding the hole and the end from one setting.
Internal grinding can be used to machine cylindrical and conical through and blind holes in parts made of non-hardened and hardened steel, cast iron, non-ferrous metals and non-metallic materials.
Internal grinding is widely used in all branches of engineering. On the inside grinding machines holes of gear wheels (smooth and splined), inner rings of ball bearings and roller bearings are machined; roller tracks of outer rings of roller bearings; holes for drill bushings, Morse taper bushings, various cutting tools, such as milling cutters, shavers, shell reamers, etc.
For internal grinding, both grinding with longitudinal feed and the plunge method are used. The first method is the most widely used. Plunge grinding is used when grinding short holes, as well as holes limited by shoulders or ledges.
In internal grinding, longitudinal and transverse feed methods are used. There are the following types of movements:
- rotation of the grinding wheel at a speed specified in m/s
- rotation of the workpiece (circular feed) at a speed specified in m/min
- longitudinal feed in fractions of the wheel height and cross feed in mm/double stroke or mm/min
When grinding with longitudinal feed, the feed rate should not exceed 3/4 of the wheel height per one revolution of the part. The cross feed is intermittent for each single or double stroke or continuous.
Plunge grinding is used in the processing of short holes, as well as internal cylindrical surfaces limited by precise ends or steps, such as roller tracks of bearing rings. To ensure uniform wear, the circle is given an additional oscillating movement, if the configuration of the part allows it.
Features of internal grinding create a number of limitations for the application of this method. These include:
- dependence of the diameter of the grinding wheel on the diameter of the workpiece being ground
- the need to insert the wheel into the hole, which requires a significant overhang of the spindle carrying the grinding wheel, especially when grinding long holes. This leads to a decrease in the rigidity of the system and limits the use of productive modes.
The dependence of the diameter of the grinding wheel on the diameter of the grinding hole, as well as the need for a significant overhang of the grinding spindle, especially when grinding long holes, due to the insertion of the grinding wheel into the hole being machined, lead to a decrease in the rigidity of the system and create a number of restrictions for the use of internal grinding.
The device of internal grinding machines
Internal grinding machines can be divided into two main groups.
- Machines in which the workpiece and the grinding wheel rotate, and the longitudinal and transverse feeds are carried out by moving the grinding spindle or headstock. Depending on the method of basing the workpiece, these machines can be chuck or centerless. On fig. 85 shown various schemes basing. On fig. 85, a, b, c show cartridge methods for installing parts, respectively, based in a membrane cartridge (c), in a cartridge at the ends (b), in a sleeve along the outer diameter with a clamp at the ends (c). On fig. 85, d, e show centerless methods of basing on shoes (d) and on rollers (d).
- Machine tools on which the workpiece, usually large in size and weight, is mounted motionless on the machine table, and the grinding wheel performs planetary movement, simultaneously rotating around its own axis and around the axis of the hole. Longitudinal and transverse feeds are carried out by moving the grinding wheel along arrows 3 and 4, respectively. Such machines are called "planetary", they can be with both vertical and horizontal spindles and have very limited use.
Depending on the nature of production, universal internal grinding machines, semi-automatic and automatic machines are used.
Universal machines with a chuck clamp are used for processing short and long cylindrical and conical holes. Tapered holes are ground by turning the headstock to the appropriate angle. These machines are common in the auxiliary workshops of mass production plants, as well as in the main workshops of serial production plants. Universal machines are usually equipped with a face grinding device, which makes it possible to ensure high accuracy in processing along the perpendicularity of the end face to the hole. Grinding heads on universal machines are mounted on a slide and can be interchangeable.
semi-automatic, widely used in mass and large-scale production, are equipped with measuring and control devices that automatically control the grinding process and stop processing when the specified size is reached.
Automata- center and centerless are additionally equipped with loading devices that feed parts for processing into the grinding zone, as well as devices for automatically fixing and removing parts and controlling wheel dressing.
The main internal grinding machines produced by the domestic industry are machines of the ZK range. These machines are designed for processing holes with a diameter of 3 to 800 mm and are available in accuracy classes P, B and A. All universal machines of the ZK range, with the exception of the ZK230V model, are equipped with face grinders.
On the basis of the main models, various modifications of the machines are produced - with an extended table stroke for processing, long parts.
3M227VF2 internal grinding machine with high precision CNC. Purpose and scope
Start of production of internal grinding machine 3M227VF2 - 1985. The machine has replaced an obsolete model 3K227
Semi-automatic internal grinding machine 3M227VF2 is designed for grinding cylindrical and conical (with apex angle up to 90°) through and blind holes.
The machine is used in machine-building plants with small-scale and serial production, in tool and repair shops and factories.
The principle of operation and design features of the machine
The 3M227vf2 semiautomatic device is easy to set up, maintain and operate; equipped with a set of grinding spindles with a wide range of grinding wheel speeds, providing the processing of parts with the most advantageous conditions.
The cross feed mechanism driven by a stepper motor carries out movement with high accuracy and stability over the entire speed range.
The internal grinding machine 3M227VF2 works with a 1P11 software device that controls the cycle of the semi-automatic machine when grinding a hole.
The semiautomatic device is equipped with a face grinding device that allows grinding the outer end of the product in one setting with hole grinding.
The automatic mode of operation of the semi-automatic machine with the setting directly by the grinder of the elements of the control cycle of the ten-day switches of the program device does not require software typical of CNC machines and allows the worker to simultaneously service several semi-automatic machines.
The usual manual control of the semiautomatic device is also possible.
All attached equipment is connected to the machine and the electrical cabinet with ready-made electrical wiring with plug connectors.
Semiautomatic devices are equipped with:
- three- and four-jaw chucks
- slotted faceplates for fastening workpieces
- fitter's tools
- abrasive wheels and mandrels for them
For an additional fee, upon request, devices for dressing a circle along the radius, along the cone, along the end can be supplied; measuring device installation, steady rest, electrospindles and spare parts.
Compared to universal internal grinding machines, when working on these semi-automatic machines, productivity is more than doubled.
The machines are designed for domestic and export deliveries.
The scope of machine tools is machine-building plants with small-scale and mass production, as well as tool and repair shops of these plants.
Machine tool accuracy class B according to GOST 8-82E.
Developer - Saratov machine-tool plant named after. 60th anniversary of the USSR.
Accuracy characteristic of the internal grinding machine 3M227VF2
- Accuracy class of semiautomatic devices according to GOST 25-80...... B
- Accuracy of ground holes and the end surface of the product sample according to GOST 25-80, microns:
- constancy of diameter in longitudinal section... 3
- roundness .................................. 1.6
- end flatness .......................... 4
- hole surface roughness ......... Ra 0.32
- end surface roughness............... Ra 0.63
- Accuracy of a polished batch of 30 bushings in automatic mode, µm:
- size spread ............................... 40
- roundness .................................. 3
- constancy of diameter in longitudinal section... 5
3M227VF2 Overall dimensions of the working space of the CNC machine
Overall dimensions of the working space of the machine 3m227vf2
3M227VF2 General view of the internal grinding machine
Photo of the internal grinding machine 3m227vf2
3M227VF2 Kinematic diagram of the internal grinding machine
Kinematic diagram of the internal grinding machine 3m227vf2
1P11 Device for positional numerical program control of the machine 3m227vf2
Positional CNC device 1P11 machine 3m227vf2
Positional Numerical Control Device 1P11, developed by Tomsk production association"Circuit" in 1983 to equip grinding machines.
The CNC device 1P11 is designed to generate control signals for the movement of the headstock of the grinding machine in accordance with the program and issue signals that ensure the execution of cycles of plunge grinding, grinding with periodic feeds and dressing of the grinding wheel.
Brief technical characteristics of CNC "1P11":
- The device provides control of movement along one axis
- Number of independent controlled coordinates - 1
- Feed drive - stepper motor
- The largest programmable travel - 99.999 mm
- Discreteness of setting displacements along the axis - 0.001 mm
- The program is entered on the input panel of the device using decade switches
- The device provides the supply of movement pulses to the stepper motor control unit
- Element base - integrated circuits of the K155 series
Installation drawing of the internal grinding machine 3m227vf2
Technical characteristics of the machine 3M227VF2
| Parameter name | 3K227V | 3M227VF2 |
|---|---|---|
| main parameters | ||
| Accuracy class according to GOST 8-82 | AT | AT |
| The largest diameter of the installed product, mm | 400 | 400 |
| The largest diameter of the installed product in the casing, mm | 250 | 250 |
| The greatest length of the installed product, mm | 125 | 200 |
| The smallest and largest diameter of the ground hole, mm | 20..160 | 20..200 |
| The greatest length of grinding with a grinding diameter of at least 100 mm, mm | 125 | |
| Distance from the spindle axis of the headstock to the bottom of the bed, mm | 1200 | 1210 |
| Distance from the spindle axis of the headstock to the mirror of the table (center height), mm | 275 | 285 |
| Distance from the support end of the product spindle flange to the end of the grinding head bracket, mm | 880 | 990 |
| Distance from the end of the new circle of the face grinding device to the supporting end of the spindle flange, mm | 120..260 | 120..280 |
| Machine work table | ||
| The greatest length of the table movement, mm | 450 | 560 |
| Manual movement of the table for one turn of the flywheel, mm | 19 | |
| Table travel speed during grinding, m/min | 1..7 | 1..7 |
| Table movement speed when dressing a circle, m/min | 0,1..2 | 0,1..2 |
| Table travel speed with fast longitudinal approach and retraction, m/min | 10 | 10 |
| grinding head | ||
| Spindle speed of internal grinding head, 1/min | 7200, 9000, 12000, 18000, 22000 | 5000..28000 |
| The largest diameter of the grinding wheel according to GOST 2424-83, mm | pp20..80 | |
| The greatest height of the grinding wheel according to GOST 2424-83, mm | 20..50 | |
| Grinding wheel hole diameter according to GOST 2424-83, mm | 6..20 | |
| Transverse movement of the grinding headstock | ||
| Movement per handwheel revolution - coarse (adjustment), mm | 2,5 | |
| Movement per revolution of the stepper motor, mm | - | 0,1 |
| Movement per handwheel revolution - fine, mm | 0,25 | |
| Movement per pulse (step) of a stepper motor, mm | - | 0,416 |
| Movement by one division of the limb, mm | 0,001 | |
| Movement on one swing of the manual dosed feed lever, mm | 0,001 | |
| The greatest adjusting movement of the grinding headstock - back (to the worker), mm | 10 | 10 |
| The greatest adjusting movement of the grinding headstock - forward (from the worker), mm | 50 | 50 |
| The size of the transverse feed of the grinding headstock on the side, mm / dv.stroke | 0,001; 0,002; 0,003; 0,004; 0,005; 0,006 | |
| Headstock (product headstock, product spindle) | ||
| The largest angle of rotation of the headstock of the product, hail | 45 | 45 |
| The largest adjusting movement of the headstock of the product - back (to the worker), hail | 30 | 30 |
| The largest adjusting movement of the headstock of the product - forward (from the worker), hail | 120 | 180 |
| Product rotation frequency (stepless regulation), rpm | 60..1200 | 60..1200 |
| Face grinder | ||
| Face spindle speed, 1/min | 5600 | |
| Longitudinal movement of the end grinding wheel, maximum adjusting, mm | 160 | 160 |
| Longitudinal movement of the face grinding wheel is the largest working (thin), mm | 4 | 4 |
| Longitudinal movement of the face grinding wheel in one revolution of the adjusting movement handwheel, mm | 27 | 27 |
| Longitudinal movement of the face grinding wheel for one revolution of the handwheel of the working (fine) feed, mm | 0,1 | 0,1 |
| Longitudinal movement of the end grinding wheel by one division of the limb of the working (fine) feed, mm | 0,0025 | 0,0025 |
| Face grinding wheel dimensions, mm | ChSh100 x 50 x 20 | ChSh100 x 50 x 20 |
| Drive and electrical equipment of the machine | ||
| Number of electric motors on the machine | 7 | 7 |
| Grinding head spindle motor, kW | 4 | 4,4 |
| The electric motor of the face grinder drive, kW | 1,5 | |
| The electric motor of the product drive (product headstock) DC, kW | 1,2 | |
| Hydraulic pump electric motor, kW | 3,0 | |
| Electric motor of the filter-conveyor, kW | 0,09 | |
| The electric motor of the pump of the cooling system, kW | 0,15 | |
| Magnetic separator motor, kW | 0,09 | |
| Total power of electric motors, kW | 10,0 | 9,0 |
| Drive with magnetic amplifier PMU5M4U4, kW | - | |
| Drive with magnetic amplifier ET1E2-9UHP4, kW | 1,0 | 1,0 |
| Number of converter units | 1 | 3 |
| Overall dimensions and weight of the machine | ||
| Overall dimensions of the machine (length x width x height), mm | 2885 x 1900 x 1750 | 2700 x 1320 x 1850 |
| Machine weight with electrical equipment and cooling, kg | 4400 | 4500 |
- Design of grinding machines, 1989
- Alperovich T.A., Konstantinov K.N., Shapiro A.Ya. Adjustment and operation of grinding machines, 1989
- Dibner L.G., Tsofin E.E. Sharpening machines and semi-automatic machines, 1978
- Genis B.M., Doctor L.Sh., Tergan V.S. Grinding on cylindrical grinders, 1965
- Kashchuk V.A., Vereshchagin A.B. Grinder's Handbook, 1988
- Kulikov S.I. Honing, 1973
- Lisova A.I. Device, adjustment and operation of metal-cutting machines, 1971
- Loskutov V.V. Metal grinding, 1985
- Loskutov V.V. Grinding machines, 1988
- Lurie G.B. Grinding machines and their adjustment, 1972
- Lurie G.B. The device of grinding machines, 1983
- Menitsky I.D. Universal grinding machines, 1968
- Mutsyanko V.I. Bratchikov A.Ya. Centerless grinding, 1986
- Naerman M.S., Naerman Ya.M. Manual for training grinders. Tutorial for vocational school, 1989
- Popov S.A. Grinding works, 1987
- Tergan V.S. Grinding on cylindrical grinders, 1972
- Shamov B.P. Types and designs of the main units of grinding machines, 1965
Bibliography:
Grinding through, blind holes of large diameter and complex shape is performed using special equipment. Internal grinding machines belong to a specialized class of devices used for processing wood, steel and polymer products.
Classification and design of machine tools
Model designed for processing large workpiecesModern internal grinding machines are divided into several types. Structurally, they are similar to horizontal or vertical milling machines. The difference lies in the way the parts are processed - the spindle is in the workpiece and removes excess material by rotation.
Often the workpiece remains stationary. The rotation from the main drive is transmitted to the shaft of the spindle head. Grinding tools are installed on it various kinds. Their choice depends on the degree of processing and the material of manufacture of the part. For the processing of large products, special models of machines are used, designed for significant loads.
Depending on the design and functional features, there are the following types of internal grinding machines:
- single spindle. Designed only for grinding the inner surfaces of cylindrical or conical workpieces;
- duplex. In addition to the main function, the second spindle performs the processing of the edges of products. This allows you to increase productivity and, as a result, the quality of workmanship;
- double-sided double-spindle. They belong to the category of special equipment. In them, the part is fixed on the structure, due to which the product is polished from both sides. In this way, complex shapes are processed.
In addition to these indicators, when choosing, it is necessary to take into account the specifics of the equipment configuration and the method of control production process. For maximum automation, it is recommended to choose CNC models. They allow you to increase the quality of processing. But for this it is necessary to correctly compose the program and carefully calculate the initial and required configuration of the part.
To control the work, the CNC internal grinding machine is started in semi-automatic mode. This means that after performing one operation, the equipment stops. At this time, you can measure the workpiece and, if necessary, make adjustments to the program.
List of main technical characteristics
Scheme of a single-spindle machineAlmost all models of internal grinding machines are designed for processing metal products. A similar operation with wooden blanks is done using other equipment. That's why specifications machines are designed for processing massive products with large dimensions.
First, the maximum and minimum dimensions of the workpieces are determined. This applies to the inner diameter of the holes as well as the outer dimensions. Then you should calculate the maximum allowable mass of the part. The next parameter is the required degree of processing - internal, end or bilateral. Based on these data, choose optimal model machine.
- maximum length of workpiece grinding. It may depend on its diameter. Typically, manufacturers indicate this parameter at the maximum and minimum diameters;
- cone processing. It is imperative to know its allowable angle;
- remoteness of the spindle axis from the surface of the desktop;
- the greatest distance from the end face of the workpiece to the support cylinder of the spindle head;
- power of electric motors. To a greater extent, this applies to the drive of the main movement of the spindle head. The power of the cooling and lubrication system of machine elements is also taken into account;
- dimensions and weight of the equipment. In the first, it is necessary to know the dimensions of the support platform and the dimensions with a possible additional equipment;
- indicators of processing accuracy, roughness of the finished surface.
Based on these indicators, choose best option equipment. Please note that processing of large workpieces will require special installations for mounting in the fixture block. This is a prerequisite if the mass of the workpiece exceeds 20 kg.
To ensure the quality of processing, a magnetic separator and a filter conveyor can be installed in the design. With their help, chips and metal dust are removed.
Features of the operation of internal grinding machines
CNC internal grinding unitThe operation of any metalworking equipment begins with the correct installation. First, a site for installation is prepared, taking into account the weight and dimensions of the machine. Additionally, the effects on the plate in the form of vibrations that occur during operation are taken into account.
Then you need to calculate the parameters of the connected electrical network. To do this, you need to know the maximum power consumption of the machine. Based on this, electrical wiring with the appropriate cross section is selected. Be sure to equip the RCD and the ground loop.
When working on an internal grinding machine, you must adhere to the following rules:
- equipment preparation. After a long downtime, components and assemblies are inspected, the machine starts in idle mode without installing a workpiece. Be sure to check the correct operation of the lubrication system and chip removal;
- staff. Before starting work, personnel must bypass the training course, which includes the study of the design of the machine. Acquaintance with the rules of operation and work safety;
- preparation requirements. For their implementation, it is necessary to study the instruction manual in detail.
Alternatively, consider installing a special tool for internal grinding. An example of such a device is shown in the video:
stanokgid.ru
WHERE TO FIND AN INTERNAL GRINDING MACHINE FOR METAL WITH HIGH PRECISION?
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Hardware Benefits
- 1Function auto tuning grinding data greatly saves data entry time
- 2Possibility of multi-sided face grinding in one setting
- 3Possibility of both direct and face grinding, and cone, contour grinding
By purchasing a Genos L300 E-M lathe, we managed to save about 30-40 working hours on just one item. Thanks to this, time was freed up for the implementation of new orders.
OOO NPO RUSTECHNO
Since the start of operation of the 4-roll plate bending machine MCB 40150 from Davi, a large amount of work has been done on rolling and calibrating the shells with a sheet thickness of 60 and 90 mm in full accordance with the requirements of the drawings.
OJSC "Petrozavodskmash"
Throughout the life of the Okuma MCR BII 35E 35*50 gantry machining center has proven to be reliable, high performance and accurate. The machine is ideal for the production of large-sized products. Thanks to this machine, we have been able to increase productivity.
ZAO Nevsky Zavod
Yargazarmatura LLC
REQUEST A QUOTE
The purpose of the equipment is the processing of surfaces of the following types: cylindrical, conical, internal, external, surfaces of complex shape, product ends. Our catalog includes two types of equipment: NC and CNC. The IGM series is the only one in the world for all abrasive processes. Brand advantages:- Built-in programming system;
- Convenient interface;
- Ready-made grinding cycles included;
- Special correction cycles and grinding cycle interrupt functions for wheel dressing;
- Automatic processing cycle: rough and clean grinding, automatic stop, circle withdrawal;
- Availability of modifications with two grinding spindles;
- CNC and a graphical way of programming methods and grinding modes allow a specialist, even with minimal experience and professional skills, to adapt to new equipment in the shortest possible time.
- Leasing offers;
- Operational service in Russia;
- A comprehensive offer from one source: equipment, engineering, service, software selection, original spare parts, training.
No time to wait several months for the delivery of metalworking equipment from abroad? Do you want to buy a machine quickly? Equipment from the world's leading manufacturers available from a warehouse in Russia - the best solution in a short time!
The sooner you select a machine and send us a request, the sooner you can put it into operation in your company. Order right now!
pumori-invest.ru
engineer will help - CNC internal grinding machine
Workpiece fastening on internal grinding machines is carried out using a 3-jaw chuck. Grinding is the final or pre-final operation, so the average tolerance is 0.008 mm. The measurement is currently made with a bore gauge using solid or reference gauges, the manufacture of which is very laborious, with a manufacturing time of 2º. Measurement in this way increases the number of technical losses in the manufacture of reference gauges due to an increase in the error in locating the part in the cartridge. It can be eliminated or reduced completely by equipping the machine with a Renishaw measuring head. According to the experience of the Renishaw measuring head on the existing Walter mini power machine, the measurement error is up to 0.001 mm. As an option, internal grinding machines Studer CT450, S145, CT960 are equipped with measuring heads.
About 15% are parts with an internal cone and an angular size accuracy of up to 0.5 minutes.
Adjustment to obtain such dimensions takes more than 15 minutes if this angle is obtained by dressing the grinding wheel. Mechanical change of the table rotation angle does not reduce the set-up time. This time can be completely minimized electronic control by turning the table. CNC internal grinding machines S145, ST960 have this possibility.
For a smooth transition of the inner surfaces of the cylinder to the cone (Fig. 1), which are now processed manually, as a result of which the quality of the surfaces processed before this operation deteriorates. The CT960 internal grinding machine has the ability to rotate the table during processing, which allows grinding a smooth transition to parts.
Fig 1. Grinding a smooth transition of the inner surfaces of the cylinder to the cone.
Fig 2. Grinding a smooth transition of the inner and outer surfaces.
The spindle with an external grinding wheel allows you to grind external cones 0-179º, such labor-intensive parts as (Fig. 2). The ST960 machine allows you to grind the back and front surfaces of cutters in one setup.
The possibility of cylindrical grinding on this internal grinding machine allows you to eliminate the changeover of equipment. Currently, grinding operations with an outer angle of more than 60º are performed on an optical grinding machine in a dry way, which leads to an underestimation of the roughness specified by the drawing.
It should be noted that the CNC internal grinding machine Studer CT960 can be equipped with 4 spindles for both external and internal grinding.
For tool production, we offer to equip 1 spindle for preliminary internal grinding and grinding of diameters over Ø 50 mm with a spindle with a rotation speed of up to 30,000 rpm, 2 spindle for final internal grinding and grinding of holes Ø 10-50 mm with a spindle with a rotation speed of up to 60,000 rpm, 3 spindle for final internal grinding and grinding of holes less than Ø 10 mm with a speed of up to 90,000 rpm, 4 spindle for external grinding and face grinding. To increase the distance between the grinding wheels, it is necessary to use a turret (Fig. 3).
engcrafts.com
Voumard (Vumard) external and internal grinding machines with CNC
Voumard's adjusted chucks as well as the profile grinding mechanisms of the cams make it possible to machine parts of almost any shape, and also allow several external and internal grinding operations to be carried out in one setup.
CNC external and internal grinding machines enjoy an excellent reputation all over the world and are integrated into the production lines and installations of leading manufacturers in the aerospace, machine tool, bearing, automotive, instrumentation and other industries.
Voumard machines (Peter Wolters) make it possible to choose the right solution for any technical task. Each Wumard machine combines high quality, precision and reliability with high efficiency and cost effectiveness.
You will find the full range of Peter Wolters grinding equipment on the corresponding page of our website:
Sanding equipment Peter Wolters
In addition to machine tools, the product range also includes grinding machine spindles, other auxiliary equipment as well as spare parts.
| VM 110 |
The Wumard VM 110 machine for internal and external cylindrical grinding is suitable for both piece and series production of small and medium-sized parts.
Complete set of the machine VM 110:
- a choice of spindle revolver with grinding spindles up to 4 pieces;
- high-precision X and Z axes;
- manual or numeric program control axis B for turning the headstock of the product when grinding cones;
- product headstock optionally with a chuck or a mechanism for grinding the profile of disk cams;
- a range of different tools for dressing grinding wheels.
Feeding options: manual loading, automatic loading, straddle loader, robot.
Machine control - Fanuc CNC with an adapted Wumard control panel.
The machine is easily adjusted for the required application.
The CNC internal grinding machine Fanuc Vumard VM 130 is equipped with a reliable automatic parts feeder with a double clamshell.
A reliable principle of separation of the X and Z axes is applied.
The VM 130 can machine workpieces up to 70mm outside diameter with a maximum workpiece length of 70mm. The smallest machined inner diameter is 0.8mm.
The Wumard control panel based on Fanuc CNC provides the most comfortable work with the machine.
The universal external and internal CNC grinder VM 300 is suitable for large workpieces.
Complete set of the machine VM 300:
- spindle revolver with grinding spindles up to 4 pieces;
- high-precision X and Z axes;
- increased working area for external cylindrical grinding thanks to the additional U-axis;
- workpiece spindle with indexing (C axis)
- manual or numerical control of the B-axis;
- heavy-duty headstock for parts weighing up to 500 kg;
- range of different tools for dressing grinding tools.
Machine control - Siemens CNC with an adapted Wumard control panel.
| VMX |
Voumard offers compact grinding machine spindles.
Voumard VMX spindles are ideally suited for Voumard (Peter Wolters) grinding machines, suitable for complex machining processes.
Spindles of Wumard grinding machines are absolutely interchangeable.
You can get more detailed information on the manufacturer's website www.voumard.ch or upon request from our specialists.
