3B642 universal sharpening machine description, characteristics, diagrams

Information about the manufacturer of the universal sharpening machine 3B642

The manufacturer of the universal sharpening machine 3B642 is Vitebsk sharpening machine plant Visas , founded in 1897.

Since 1940, the company has specialized in the production of sharpening equipment and today is the only manufacturer in the CIS of machines for the manufacture and sharpening of any cutting tool. The plant's products are used in more than sixty countries around the world.

Machines produced by the Vitebsk sharpening machine plant, Visas

• 3A64
  - universal sharpening machine Ø 250 x 650
• 3A64M
  - universal sharpening machine Ø 250 x 650
• 3A64D
  - universal sharpening machine Ø 250 x 600
• 3A662
  - semi-automatic grinding machine for hob cutters Ø 200 x 280
• 3B642
  - universal sharpening machine with hydraulic drive Ø 250 x 630
• 3B642
  - universal sharpening machine Ø 250 x 630
• 3D641E
  universal sharpening machine with hydraulic drive Ø 200 x 400
• 3D642E
  - universal sharpening machine with hydraulic drive Ø 250 x 630
• 3D692
  - universal sharpening machine for circular saws, semi-automatic Ø 275..1430
• 3E642
  - universal sharpening machine Ø 250 x 630
• 3E642E
  - universal sharpening machine with hydraulic drive Ø 250 x 500
• 3E692
  - universal sharpening machine for semi-automatic circular saws Ø 250..1430
• 3M642
  - universal sharpening machine Ø 250 x 500
• 3662
  — grinding machine for hob cutters, semi-automatic Ø 125 x 200
• VZ-318, VZ-318E
  - universal sharpening machine Ø 200 x 500
• VZ-818, VZ-818E
  - universal sharpening machine Ø 200 x 500
• VZ-319
  – universal tabletop sharpening machine Ø 100 x 200
• BDS-4
  - combined wood cutting machine
• BDS-5
  - combined wood cutting machine

3B642 universal sharpening machine. Purpose and scope

Universal sharpening machines 3B642 are designed for sharpening the main types of cutting tools: cutters, milling cutters, countersinks, etc. made of tool steel, hard alloy, cermets with abrasive, diamond and CBN wheels.

Universal sharpening machines 3B642 have a cast iron frame, this increases the accuracy of processing and reduces vibrations caused during processing of the part. Additionally, the machines can be equipped with a sine plate for securing workpieces, a device for radius sharpening of cutters and multi-edge end tools, a device for external cylindrical grinding, for internal grinding, for sharpening right- and left-handed countersinks, etc.

The design of the 3B642 universal sharpening machine 3B642

and differs from the latter in the absence of a hydraulic drive. A two-speed AC motor is used to drive the grinding wheel spindle. The spindle speed is changed by rearranging the belt and switching the speed of the electric motor.

Universal sharpening machines models 3B642 and 3B642 have 94% standardized parts and are distinguished by the fact that on the machine mod. 3B642 sharpening of the tool can be done both manually and automatically, and on the machine mod. 3B642 - only with manual.

Sharpening and grinding are carried out only by manually moving the part with the table.

Technical characteristics of the machine:

• largest diameter of the installed part 250 mm
• maximum length of the part installed in the centers, 630 mm
• Dimensions of the working surface of the table (length and width) 900 x 140 mm
• maximum vertical movement of the grinding head 250 mm

The machines have the following main components: frame, column, support, grinding head, grinding head lifting mechanism, planetary gearbox, cooling system.

The machine model 3B642 is also equipped with a hydraulic unit a hydraulic cylinder and hydraulic panel are built into its support .

Universal sharpening machines models 3B642 and 3B642 can be used for sharpening tools with diamond and conventional grinding wheels with cooling and dry. To sharpen carbide tools, use silicon carbide or diamond grinding wheels of the same size and shape.

To protect against splashing of coolant and drain it into the tank, use a special fence.

The scope of use of universal sharpening machines is expanded by the accessories included with them:

• for cylindrical external, internal and surface grinding
• for sharpening cutting and slotting cutters
• milling heads
• hob cutters
• taps
• twist drills
• countersinks and other tools

Included with the machine:

• universal head
• front and rear center stock
• dividing and other mechanisms

The devices installed on the top plane of the turntable are secured with T-head bolts.

As can be seen from the list of accessories, the machines can perform, in addition to sharpening operations, external, internal and flat grinding.

The climatic design and placement category of machines, separately located equipment and accessories comply with GOST 15150-69 for delivery to the areas:

with a temperate climate - UHL4;

Machine accuracy class – P.

Universal sharpening machines. General information

Sharpening machines are used for sharpening tools and are used in tool shops of factories and in sharpening departments of machine shops. According to the method of sharpening, they are divided into two groups:

• machines for abrasive sharpening and finishing of tools, working with a grinding wheel;
• machines for non-abrasive sharpening and finishing.

The first group is more widespread. The main fleet of sharpening machines consists of machines that operate with abrasive tools. In industry, diamond wheels are becoming increasingly widespread for fine sharpening and finishing of cutting tools equipped with carbide inserts. The use of diamond wheels instead of conventional grinding wheels significantly increases productivity. Sharpening a tool with diamond wheels on a metal bond allows in some cases to eliminate the operation of finishing the tool.

The second group includes machines for anodic-mechanical sharpening and for electric spark sharpening and finishing of tools.

According to their purpose, sharpening machines are divided into

• universal (for sharpening various types of tools)
• special (for sharpening a certain type of tool)

Universal sharpening machines are used for sharpening multi-edge tools made of tool steel and hard alloys. Grinding machines allow you to work with cylindrical and conical tools, countersinks and reamers. Grinding machines are also used for processing cutters, cutters and taps, cutters, hobs, gear-cutting heads and broaches, with screw and straight teeth, etc. on the front and rear surfaces located on the periphery and end with CBN, diamond and abrasive grinding wheels.

Grinding machines of this type can also perform cylindrical (external and internal) and flat grinding.

3B642 General view of the sharpening machine

Photo of universal sharpening machine 3B642

Photo of universal sharpening machine 3B642

Photo of universal sharpening machine 3B642

Photo of universal sharpening machine 3B642

Machine 3E642E. Universal sharpening. Manual. Hydraulic equipment

This instruction manual “Universal sharpening machine 3E642E” contains information necessary both for the maintenance personnel of this machine and for the employee directly involved in working on this machine. This manual is an electronic version in PDF format of the original paper version. This documentation contains the Manual (instructions) for operating the hydraulic equipment of the 3E642E universal sharpening machine.

Hydraulic circuit diagramPurpose of hydraulic equipmentDesign

• Hydrocommunication
• Hydropanel

Description of the hydraulic systemInstructions for installation and operation

• Safety instructions
• Preparing the hydraulic system for start-up

Possible malfunctions and methods for eliminating them

Location of components of the sharpening machine 3B642

Location of components of the sharpening machine 3B642

Specification of components of the sharpening machine 3B642

• I. Unit 24. Lifting mechanism
• II. Unit P. Accessories
• III. Unit 60. Cooling
• IV. Unit 40. Grinding head
• V. Unit 30. Caliper
• VI. Unit 91. Mandrels
• VII. Unit 31. Planetary gearbox
• VIII. Unit 10. Bed
• IX. Unit 92. Housings
• X. Node 20. Column
• XI. Unit 80. Electrical equipment
• XII. Unit 21. Gearbox

Unit 90. Accessories (not shown in the figure)

Unit 93. Fence (not shown in the figure). Universal devices, which serve to expand the range of work performed on the machine, are supplied with the machine and are included in the kit and price of the machine, and special devices are supplied upon request of consumers for a special fee.

The universal sharpening machine is designed for sharpening the main types of cutting tools: cutters, milling cutters, countersinks, etc. The machine is equipped with various devices that allow you to install and secure the tool being sharpened. In addition to tool sharpening, the machine can perform external, internal and surface grinding.

The main components of the 3B642 machine: a bed, a table with a support group and a grinding head with a spindle on which grinding wheels are mounted. There are devices on the table. The transverse and longitudinal movement of the table is carried out respectively by flywheels, and the raising and lowering of the grinding head is carried out by a flywheel.

Main structural elements

The universal sharpening machine, due to its large weight, is installed on a concrete base, has a steel frame and a cast-iron bed. The use of the unit is allowed in temperate climatic zones, and the accuracy of the processing of parts corresponds to class “P”.

Kinematic diagram of the 3V642 machine

A table is mounted on top of the frame, which includes three structural elements: the upper part of the table is a support that can rotate relative to its middle part. In turn, the middle part moves longitudinally, relative to the lower part. To move the middle part, flywheels equipped with rack and pinion wheels and a planetary mechanism are used.

It is possible to smoothly bring the workpiece to the grinding wheel; special flywheels with a ratcheting mechanism are used for this. Like most other sharpening machines, the 3B642 model uses a standard spindle configuration, which allows you to clamp commercially produced grinding wheels.

3В642 Location of sharpening machine controls

Location of controls for sharpening machine 3B642

3В642 List of sharpening machine controls

1. Vertical feed handwheel
2. Slow vertical feed button
3. Window cover for access to the spindle motor
4. Spindle motor stop button
5. Slow vertical feed switch handle
6. Spindle motor start button
7. Fine cross feed handwheel
8. Screw for securing the table against rotation
9. Table rotation screw
10. Left table support
11. Cooling tap
12. Grinding Wheel Guard Clamps
13. Right table support
14. Button for turning on slow longitudinal feed of the table manually
15. Handwheel for slow longitudinal table feed manually
16. Plug socket for connecting the electric motor of the vacuum cleaner
17. Cooling tank niche cover
18. Input switch (automatic)
19. Electrical cabinet cover lock
20. "General stop" button
21. Cross feed handwheels
22. Handle for securing the grinding head against vertical movement
23. Grinding head rotation handle
24. Nut securing the grinding head against rotation
25. Spindle rotation lock button
26. Light switch
27. Manual table longitudinal feed handwheel
28. Nuts for securing the table against rotation
29. Jog cross feed lever
30. Signal lamp
31. Spindle reverse
32. Cooling and vacuum cleaner switch
33. Spindle motor speed switch
34. Plug socket for connecting electric motors of devices

3B642 Kinematic diagram of the sharpening machine

Kinematic diagram of the sharpening machine 3V642

The main movement - rotation of the spindle with grinding wheels 1 and 2 - is carried out from a two-speed electric motor 3 through belt drives 4-5 or 6-7 and then through gear 8-9 to spindle 11.

The periphery of the cylindrical circle 2 is used to grind the surfaces of the rotating bodies, which are installed in the centers of the device on the machine table, and the cup wheel 1 is used to grind the flat surfaces of the tool, for example, the thread of a tap along the front plane.

The electric motor , together with the bracket on which it is mounted and with the pulley 8, can be lowered down using a screw 10, tensioning the grinding head belt.

The grinding head with grinding wheels 1 and 2 (Fig. 78, a) is mounted on the top of the vertical column 11 and can be rotated with it around a vertical axis (Fig. 78, b). In addition to turning, the column can move up or down using flywheels 12 or 13. From flywheel 12, movement can be transmitted directly to shaft I if clutch 45 is turned on with button 14 (fast movement) or through a planetary mechanism with gears 15-18 and then through worm gear 19-20 to a rack and pinion pair with a rack wheel 21 and a rack 22 mounted on a column (slow movement).

If the column moves with the help of flywheel 13, then the movement goes through the conical pair 23-24 and further along the same chain.

The table with support group consists of three parts. On the upper rotating part 25, the tool to be sharpened is installed in the appropriate fixtures. The upper part of the table rotates relative to the middle part 26 to sharpen the conical surfaces of the tool. The middle part of the table 26 has manual longitudinal movement on roller guides of the lower part of the table 27. This movement is carried out by flywheels 28 or 29 with rack and pinion gears 30, or by a handle 31 on the body (lead) of the planetary gear. In the latter case, by pressing the button 32, the rack wheel 33 associated with the planetary mechanism is turned on, and the wheels 30 associated with the flywheels 28 and 29 are disconnected from the rack 34, while the table receives a slow transverse feed from the planetary mechanism with wheels 35-38.

The lower part of the table 27, together with the middle and upper parts, is moved in the transverse direction using a lead screw 39 and a nut fixed to the frame. Fine (slow) transverse feed is carried out by rotating flywheels 40 or 41, which turn the lead screw 39 through gears 42-43.

The ratchet mechanism 44, which is driven by a special handle, through the same gear 42-43 communicates to the lead screw, and therefore to the table, a periodic slow motion. The fine (slow) table feed allows the tool to be sharpened to be carefully brought to the grinding wheel.

Machine accessories significantly expand the range of use of the machine. These include: a headstock with indexing disks, a tailstock, a universal sharpening head, a universal rotary vice, a device for dressing wheels, a device for sharpening cutters with backed teeth, a device for sharpening drills, a stop for sharpening cutters with screw teeth and some others.

Electrical equipment of sharpening machine 3E642

Supply system

The power supply to the machine is carried out with a copper wire with a cross-section of 2.5 mm².

The supply wires are entered through a flange elbow with a G1/2″ thread.

The following AC and DC voltages are used on the machine:

1. power circuit 3 variable 50 (60) Hz, 380 (220, 230, 400, 415, 440) V
2. control circuit 3 variable 50 (60) Hz, 110 V
3. alarm and local lighting circuit – alternating 50 (60) Hz, 24 V

Initial launch

Before starting up the machine, it is necessary to carry out an external inspection of the electrical equipment.

ATTENTION! During EXTERNAL INSPECTION, THE INPUT SWITCH SHOULD BE SET IN THE “OFF” POSITION. During an external inspection of electrical equipment, it is necessary to check

During an external inspection of electrical equipment, it is necessary to check

• reliability of installation of electrical equipment and quality of electrical wiring;
• reliability of the grounding of the machine, as well as separate units and devices;
• condition and initial position of electrical equipment and mechanisms.

After inspection, disconnect by separating the connectors, and if they are missing, by disconnecting the power wires A6, B6, C6 (electric motor M6) of all electric motors at the terminal set in the electronic niche.

Set the QPI input switch to the “On” position. At the same time, the HLI signal lamp “Power connected” should light up on the control panel.

Using manual controls, check the precise operation of the magnetic starters.

When smooth operation of all electrical devices located on the control panel is achieved, connect the previously disconnected power wires of the M6 ​​column drive electric motor to the terminals of the terminal block. Perform phasing of the network by correctly connecting the supply wires to the input terminal set, which is determined by the correspondence of the direction of movement of the column to the purpose of the push-button switches on the control panels that determined these movements. Next, connect the remaining electric motors.

Check the operation of electrical equipment in all modes without the product (idling).

Check the functionality of the emergency shutdown device (General Stop switch).

Check the operation of all locking devices according to section 5.

Check local lighting.

Description of work

Starting the grinding wheel, cooling pump (vacuum cleaner), and accessories is carried out by switches SB10, SB11, SB12, stopping by switches SB1, SB2, SB3 (“All stop”). The rotation direction and rotation speed of the grinding wheel are determined by switches SAI, SA2, respectively. The cooling pump (vacuum cleaner) can also be turned off autonomously using the SA3 switch. The choice of the direction of rotation and autonomous stop of devices P17, P51 can be carried out using switches SA4 and sA5, respectively.

Raising and lowering the column is carried out by switches SB4... SB6 and SB7... SB9, respectively.

Locks

The electrical circuit of the machine provides the following interlocks:

• impossibility of moving the column upward when the mechanism reaches the uppermost position - microswitch contact SQI (3.8);
• impossibility of moving the column down when the mechanism reaches its lowest position - microswitch contact SQ2 (3.9);
• inability to continue operation of the machine when switching switches SAI or SA2 or being in position “O” – contacts of switches SAI, SA2 (3.7).

Alarm system

The electrical circuit of the machine provides the following signaling: the “Power is connected” lamp is milky colored, located on the main console (HLI).

Technical data and characteristics of the 3B642 machine

Bibliography:

1. Universal sharpening machine 3B642. Operating instructions 3В642.000 РЭ, 1978
2. Dibner L.G., Tsofin E.E. Sharpening machines and semi-automatic machines, 1978
3. Demyanovsky K.I., Dunaev V.D. Sharpening wood cutting tools, 1965
4. Kudryashov A.A. Tool production machines, 1968
5. Lisova A.I. Design, adjustment and operation of metal-cutting machines, 1971
6. Menitsky I.D. Universal sharpening machines, 1968
7. Paley M. M. Technology of production of metal-cutting tools, 1982
8. Rozhkov D.S. Design, setup and operation of equipment for sharpening wood-cutting tools, 1978

Related Links. Additional Information

• Classification and main characteristics of the grinding group
• Repair, restoration and modernization of grinding machines: the American approach
• Cylindrical grinding. Processing on cylindrical grinding machines. Grinding Methods
• Setting up a cylindrical grinding machine when installing parts in centers
• CNC grinding machines
• Marking of grinding wheels
• Testing and checking metal-cutting machines for accuracy
• Grinding machines. Market of grinding machines in Russia
• Directory of grinding machine manufacturers
• Directory of factories producing metal-cutting machines
• Directory of surface grinding machines

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Time-tested model

has specialized in the production of sharpening equipment since 1940. During this time, many models of various machines were produced, and among them a special place is occupied by the 3B642 universal sharpening machine.

As follows from the passport of the universal sharpening machine 3B642, this unit belongs to the group of machines designed for abrasive sharpening of various tools, as well as for finishing them using grinding wheels of various shapes and configurations.

The 3B642 universal sharpening machine with unchanged technical characteristics has been produced by the plant since the eighties of the last century. This equipment was equipped with passports and supplied to mechanical factories, repair and locksmith shops, and defense industry enterprises.

The unit passport contains comprehensive data on the technical characteristics of the 3B642 universal sharpening machine.

Download the passport (operating instructions) of the universal sharpening machine 2V642

The power of the main drive electric motor is 1.4 kW. Together with the main drive mechanism, the motor ensures rotation of the spindle and grinding wheel with a diameter of up to 200 mm.

According to the passport, the speed of the grinding wheel is stepwise adjustable and, depending on the task being performed, can be 2240, 3150, 4500 or 6300 rpm.

The vertical movement of the headstock is within 250 mm, and the largest longitudinal movement of the table is 450 mm, while the transverse movement reaches 230 mm, according to the passport.

Electrical circuit of the machine 2V642

The given technical characteristics of the machine make it a truly universal unit, which is still in demand in production and in repair shops.

The 3B642 universal sharpening machine brilliantly copes with such operations as sharpening countersinks, reamers, drills, cutters, end and double-sided cutters, as well as taps. The machine is also capable of flat grinding of both external and internal surfaces of parts.

When operating the machine, various grinding wheels can be used to meet the requirements. These can be diamond, carbide or regular wheels, depending on the characteristics and hardness of the parts being processed.