3B722 universal surface grinding machine with a horizontal spindle. Passport, diagrams, characteristics, description

Information about the manufacturer of the surface grinding machine 3B722

The manufacturer of the 3B722 surface grinding machine is the Lipetsk Machine Tool Plant , founded in 1929.

In 1956, the tractor repair plant was reoriented to produce machine tools and renamed the Lipetsk Machine Tool Plant.

Machines model 3B722 B are typical representatives of the range of surface grinding machines with a rectangular table of medium size and allow processing flat surfaces of a wide variety of parts with micron precision. When using additional devices, these machines can also process shaped surfaces.

Machine tools produced by the Lipetsk Machine Tool Plant, LSZ

3B722
- surface grinding machine with a horizontal spindle 320 x 1000
3D722
- surface grinding machine with a horizontal spindle 320 x 1000
3L722V, 3L722A
- surface grinding machine with a horizontal spindle 320 x 1000
3L742VF10
- surface grinding machine with round table Ø 630
3P722
- surface grinding machine with a horizontal spindle 320 x 1000; 320 x 1250; 320 x 1600

General view of the surface grinding machine 3B722

Photo of surface grinding machine 3B722

Location of components of the grinding machine 3B722

Specification of components of the grinding machine 3B722

Housings - 3B722-80
Carriage - 3B722-35
Grinding head - 3B722-30
Electrical equipment - 3B722-90a
Table - 3B722-20
Bed - 3B722-10
Hydraulic feed box control panel - 3B722-41
Grinding head hydraulic feed box - 3B722-54
Table control panel - 3B722-40
Hydraulic box for table reverse - NG-52
Control panel - 3B722-91
Electrical equipment pipeline - 3B722-92
Pressure gauge valve - 3B722-48
Hydrobox of a fairy tale of table guides - NG-60
Reversible feed spool - 3B722-59a
Spindle lubrication installation - 3B722-57a
Bellows relay - NG-65V
Accelerated movement mechanism - 3B722-37b
Cooling - 3B722-75
Electromagnetic plate for voltage 110, GOST 3860-56 EP-32G
Magnetic separator – CM-3MA
Accessories - 3B722-85
Table cylinder - 3B722-50
Pumping unit - 3B722-56
Pipeline - 3B722-51
Column - 3B722-15
Grinding headstock reverse hydraulic box - 3B722-53
Limit switch assembly - 3B722-46b
Carriage gearbox - 3B722-26
Grinding headstock cylinder - 3B722-52
Column reducer - 3B722-27
Screw drive support - 3B722-28
Vertical feed mechanism - 3B722-36
Feed mechanism plunger - 3B722-55

filter NG-62

Location of controls for grinding machine 3B722

Control panel for surface grinding machine 3B722

List of controls for the grinding machine 3B722

Mobile table supports
Table reverse lever from stops
Reverse handle for hydraulic lateral movement of the grinding headstock
Reverse stops for hydraulic movement of the grinding headstock
Handle for turning on manual lateral movement of the grinding head
Flywheel for manual lateral movement of the grinding headstock
Emphasis
Cooling valve
Handwheel for manual vertical feed of grinding headstock
Handle for changing the nature of the cross feed
Throttle handle for regulating the amount of continuous cross feed
Throttle handle for intermittent cross feed control
Handle for setting the automatic vertical feed amount
Handle for preparing the inclusion of accelerated vertical movement of the grinding headstock
Hard Stop Installation Handle
Button for disconnecting the dial from the flywheel
Throttle handle to regulate table speed
Manual table reverse handle
Handle “Start”, “Stop”, “Unloading” of the table
Light switch "On", "Off"
Electromagnetic plate switch “On”, “Off”, “Demagnetized”
Switch “Work with stove”, “Work without stove”
Signal lamp "Stove on"
Signal lamp “Presence of grease in spindle bearings”
"General stop" button
Hydraulics start button
Hydraulic stop button
Button for accelerated movement of the grinding head "Up"
Button for accelerated movement of the grinding headstock “Down”
Grinding wheel start button
Grinding wheel stop button
Cooling enable switch “On”, “Off”
Automatic vertical feed switch “On”, “Disabled”

Design features of the machine

Appearance

The installation consists of a horizontal frame, on the surface of which there are guides, on which the workpiece is attached. During operation, a displacement is performed in the horizontal longitudinal direction. For processing large workpieces, slight shifts in the transverse direction are possible. The grinding wheel is fixed on the headstock. This aggregation unit can move in a vertical plane.

For normal operation of the equipment, the design includes 6 electric motors. The main drive of the headstock spindle is carried out by transmitting torque from a 10 kW power unit. For accelerated vertical displacement, a 1.1 kW electric motor is used. The remaining drive devices are designed to ensure the operation of the cooling systems and magnetic separator.

The 3B722 surface grinding machine has the following specific characteristics:

Kinematic diagram of surface grinding machine 3B722

Vertical feed chain of the grinding headstock

Manual feed . The movement from flywheel 35 is transmitted through gears 23, 22, clutch 21, bevel gear pair 20, 19 to nut 18 connected to lead screw IX..

Since the nut is fixed against vertical movement, when it rotates, screw IX will move in the axial direction and move the carriage with the grinding headstock.

Automatic feeding . At the moment of reversing the grinding head, oil is supplied to one or another cavity of the cylinder of the feed mechanism 46 and moves the plunger rack 47. The latter, through the gear 48, rotates the crank 45, which, through the connecting rod 44, turns the lever 43 with the pawl 37 sitting on it at an angle of 40-50° .

The pawl turns the ratchet 25 connected to the flywheel 35. The movement is then transmitted along the chain described above to the screw.

The amount of automatic feed is adjusted by turning the cover 24, as a result of which the pawl 37 can turn the ratchet 25 along the entire path of its movement or part of it. The position of the cover 24 is changed from the handle 30 through gears 28, 27, 29, 26 and a gear sector cut on the cover 24.

To automatically stop the feed after removing the set allowance, a sector 31, 88 mounted on the limb 36 is used. At the same time, it enters the rolling zone of the pawl 37, which begins to slide along it without touching the teeth of the ratchet 25.

When working manually, a hard stop 38 is brought to the “hard stop” by the handle 39, against which the stop fixed on the dial 32 rests at the end of the stroke. The dial is connected to the flywheel 35 by means of a gear lock 33, which is activated by pressing the button 34.

Accelerated movement . An accelerated installation movement is prepared by turning the handle 41. In this case, using a helical groove on the shaft using a lever 49, gear 22 is disengaged from gear 23 and flywheel 35 is disconnected from the feed chain. At the same time, the cam 40 presses the limit switch 42, which unlocks the push-button station for starting the electric motor of the rapid movement mechanism.

When the electric motor is turned on, the movement from the electric motor shaft is transmitted by a silent chain through sprockets 52, 53. Gears 50, 51 to screw IX along the previously discussed chain.

In this case, the grinding head moves up or down.

Grinding headstock cross feed chain

Manual feed . From flywheel 12 through a worm gear (worm 5 - gear 4), rotation is transmitted to rack and pinion gear 2, which is meshed with rack I mounted on the grinding headstock.

To prevent the transmission from breaking when the grinding head is hydraulically moved from the cylinder, worm 5 is disengaged from gear 4 by turning handle II. In this case, the eccentric sleeve is blocked by cam 6 and lever 3, excluding the movement of the grinding head from the hydraulic cylinder when the worm is turned on.

Automatic feeding . When the grinding headstock moves transversely from the hydraulic cylinder, pin 17, mounted on the headstock body, slides along the spiral groove of shaft III, causing it to rotate. Next, through gears 16 and 15, a disk with adjustable stops 13 is driven into rotation. The disk with stops makes almost a full revolution at the maximum transverse passage of the grinding headstock, and the stops, acting on the reversible handle 14, rotate it together with the roller and the lever 9 sitting on it. The lever with one of its fingers acts (when reversing the grinding headstock) alternately on the limit switches 7 and 10, which give the command for vertical automatic feed, and with the other finger it switches lever 8, connected to the reversing spool of the grinding headstock reverse hydraulic box.

Handle 14 can also be used to manually reverse the grinding headstock.

Grinding head drive . The grinding wheel spindle receives rotational motion through a coupling from a flange-mounted electric motor with a power of 10 kW at 1460 rpm.

Specifications

According to the accepted classification, the 3B722 machine has an accuracy class of “P”. Thanks to the versatility of its design, it can process parts whose dimensions do not exceed 100*36*40 cm. Moreover, the distance from the spindle to the table surface can be from 19 to 63 cm.

The determining quality of the machine is the parameters of the spindle head. The maximum and minimum grinding depth, as well as the speed of this process, depend on its characteristics. The permissible dimensions of the grinding wheel range from 32.5 to 45 cm. In this case, the landing diameter is 20.3 cm. The spindle receives a maximum torque of 6.7 kgf*m.

In addition, you should take into account the following technical parameters that the spindle head of the 3B722 machine has:

transverse displacement value – 40 cm;
number of automatic feeds per table stroke – from 1 to 30;
maximum vertical displacement – 44cm;
characteristics of automatic vertical feeds – from 0.005 to 0.1 mm;
vertical accelerated displacement speed – 0.45 m/min.

The machine can operate in automatic or manual feed mode. In the first case, it is necessary to use the automation system.

Technical parameters of the desktop:

surface dimensions - 100*32 cm;
dimensions of the fixed electromagnetic plate – 90*32 cm;
longitudinal displacement value – from 30 to 105 cm;
possibility of adjusting the speed of displacement of the work table - from 2 to 40 m/min.

In addition to these characteristics, it is worth noting the automatic stupor reverse. This function allows you to quickly respond to changes in the configuration of the workpiece.

The 3B722 surface grinding machine has large dimensions - 341 * 202 * 229 with a weight of 6950 kg without an installed part. This is due to the cast frame, which ensures the stability of the equipment during operation.

Electrical diagram of surface grinding machine 3B722

Electrical circuit of surface grinding machine 3B722

The voltage of the general AC supply network is 380 V.

Voltage of control circuits - 110 V, local lighting - 24 V, alarm - 5 V, DC control circuits - 110 V.

Description of the operation of the machine's electrical circuit

By turning the handle of the input batch switch PP1 to the “On” position, the power circuit of the machine is turned on (Fig. 18).

To prepare the circuit for operation, you must turn on the AI and A2 switch to the “On” position. Turn on the rotation of the grinding wheel.

Turning on the rotation of the grinding wheel is done by pressing the KU1 button again.

Button KU1 has two N.O. contacts 7-9 and 17 - II

The first contact turns on the short circuit contactor circuit, the second contact turns on the KI contactor, which is N.O. contact 17-II becomes self-powered and turns on electric motor D1.

Turning the electromagnetic cooker on and off

The machine is equipped with a magnetic plate to hold parts made of magnetic materials during the grinding process.

You can work without a magnetic plate. To select the type of work, switch P1 “Work with a stove” - “Without a stove” is installed on the remote control.

By turning the handle of this switch to the “Work with stove” position, the power circuit of the electromagnetic stove is prepared for switching on.

By turning the handle of switch P4 to the “On” position, contacts P1-P3 and P4-P2 are closed and voltage is supplied to the magnetic plate through the circuit P1-P3-P5-P4-P2

In this case, the electromagnetic relay P> is activated, the coil of which is connected in series with the magnetic plate. Relay P> with its N.O. contact 5-19 prepares the K2 contactor circuit for switching on, and contact 3-107 turns on the LS1 “Stove on” signal lamp. To remove products from the magnetic plate, you must move the handle of the drum switch to the “Demagnetized” position and release it.

Under the action of the spring, the handle will return to the zero position. In the zero position, contact P4-P6 closes, all other contacts are open, the plate, disconnected from the rectifier, is shunted by resistance R. Relay P> turns off, turning off the signal lamp LS1, and contact 5-19 opens.

In the “Demagnetized” position of the switch handle P4, its contacts P1-P4 and P2-P7 are closed and a reverse current of reduced strength flows in the coils of the electromagnetic plate due to the presence of part of the resistance R in the circuit. A short-term current pulse of reverse polarity is necessary to demagnetize the magnetic plate and partially ground parts.

Overhaul of a surface grinding machine

When operating the machine, not only the working tools wear out, but also the internal rotating components. This leads to a decrease in the quality of metalworking. Modernization and repair of 3L722V surface grinding machines is carried out in Lipetsk and the Moscow region.

When using a machine for up to 20 years, failure of its main components is unlikely. But every year the possibilities of new technologies of 3L722V equipment increase. In order for the machine to meet the latest requirements, it needs modernization and modification. Based on the fact that the basic scheme does not fundamentally change, and the basic parameters of the working surfaces are maintained, the modernization of the machine will not affect the appearance and dimensions of the equipment. For the master servicing the machine, the manufacturer’s manual for operation and maintenance of the 3L722V will remain relevant. Only some power characteristics of electrical equipment will change. What needs to be taken into account when replacing the characteristics of improved units in the instructions. A major overhaul of equipment manufactured half a century ago involves a complete update of the electrical systems. The general circuit will remain the same, but in operation the machine will become quieter and more powerful, which is justified by replacing the DC electric motor with a similar one operating on AC.

During the modernization process, when replacing the engine of a surface grinding machine, the gearbox and control system are changed. Manual settings are being replaced by CNC. Installing software control only makes sense on equipment that meets certain accuracy requirements. This quality is achieved by serviceable lead screws, bearings, gear reducers, smooth guides, and a well-functioning lubrication system.

Hydraulic equipment of surface grinding machine 3B722

Hydraulic diagram of surface grinding machines models 3B722 and 3B724

filter
filter
pump
pump
pressure spool
filter
pressure spool
pressure reducing valve
throttle
control distributor
table movement hydraulic cylinder
hydraulic cylinder for moving the grinding head
grinding head control distributor
throttle
check valve
lever arm
grinding head control distributor
hydraulic reverse gearbox for grinding headstock
blocking distributor
reverse lever
check valve
grinding head feed box
dosing distributor
throttle
control distributor
distributor controlling feed change
throttle
throttle
check valve
check valve
throttle
vertical feed cylinder
table control panel
throttle for adjusting the smoothness of table reverse
distributor
distributor
table speed throttle

Description of the hydraulic drive of surface grinding machines 3B722 and 3B724

The hydraulic drive of the machine (Fig. 44) carries out:

reciprocating table movement
reciprocating movement of the grinding head
vertical feed of the grinding head
Lubricating table guides
spindle bearing lubrication

The hydraulic drive of the machine has three main systems:

high pressure (working system)
low pressure (control system)
Lubrication of grinding head bearings

Moving and reversing the table . Oil from the tank through filter 1 is supplied by pump 3 through pressure spool 7 to distributor 36.

When the distributor spool 36 is in the right position, oil enters the left cavity of the cylinder 11 attached to the table. The table moves to the left. The oil displaced from the right cavity of cylinder 11 is discharged into the tank through distributor 95 and throttle 37. Throttle 37 is used to regulate the table speed. When the table moves to the left, the stop with the help of lever 20 moves the distributor spool 25. In this case, oil from pump 4 through the pressure spool 5, distributor 25, check valve 29 will flow under the right end of the distributor spool 35 and move it to the extreme left position. Oil from under the left end of spool 35 is forced out through throttle 34 of distributor 25 into the tank. Throttle 34 is used to adjust the smoothness of table reverse.

As soon as the distributor spool 35 moves to the extreme left position, oil will begin to flow into the right cavity of the cylinder 11. The table will move to the right until the stop moves the distributor spool 25, after which the cycle will repeat.

Transverse feeds and reverse of the grinding headstock . The distributor spool 26 can occupy one of three positions (see Fig. 44): the far right corresponds to intermittent flow, the far left to continuous flow, and the middle to no flow. The distributor spool 13 can occupy one of two extreme positions: the right, corresponding to the movement of the grinding head by a hydraulic drive, and the left, corresponding to the movement of the grinding head manually.

Continuous feed of the grinding head . Oil from pump 4 through pressure spool 5, throttle 27, distributors 26 and 19 enters distributor 13. If distributor spool 13 is in the left position, then oil enters the rod cavity of cylinder 12 and the grinding head moves to the left. From the piston cavity of cylinder 12, oil is drained into the tank through distributors 13 and 17.

When lever 16 moves the distributor spool 17 to the right, oil from pump 4 through distributors 26, 19, 13, 17 and check valve 15 falls under the left end of the distributor spool 13 and moves it to the right position, directing the oil flow into the piston cavity of cylinder 12. Grinding headstock moves to the right. From the rod cavity of cylinder 12, oil is drained into the tank through distributors 13 and 17. Throttles 14 regulate the speed of movement of the distributor spool 13.

Intermittent transverse feed of the grinding head occurs with each table reverse, i.e., with each movement of the distributor spool 25. From pump 4, through distributor 25 and check valve 21, oil enters the right cavity of the metering distributor 3. From the left cavity of the metering distributor 23 through the throttle 24 distributor 25, the oil is drained into the tank. When the dispenser moves from one extreme position to the other, part of the oil from pump 3 through the pressure valve 7, throttle 28, distributor 26, dispenser 23 enters the distributor 19 and then flows in the same way as in the case of continuous supply.

Vertical intermittent feed of the grinding headstock . When reversing the cross feed of the grinding head, lever 16 turns on one of the electromagnets of the distributor 10 through the limit switches, moving its spool to one of the extreme positions. If the distributor spool 10 is in the left position, then the oil from the pump through the pressure spool 5 and check valve 30 enters the vertical feed cylinder 32 - the grinding headstock is fed vertically. From the left cavity of cylinder 32, oil through throttle 31 and distributor 10 is drained into the tank.

Vertical feed of the headstock in the opposite direction occurs in a similar way.

Possible malfunctions in the hydraulic drive of the surface grinding machine 3B722, ZB724

Before troubleshooting, you need to check the pressure in the hydraulic system. The pressure should be equal to: high (in the working system) 1.5-2 MPa, low (in the control system) - 0.6..0.8 MPa, in the lubrication system of the bed guides - 0.05 MPa, in the lubrication system of the grinding bearings headstock - 0.1 MPa.

Technical data and characteristics of the 3B722 machine

Parameter name	3B722	3D722	3L722V
Main settings
Accuracy class according to GOST 8-82	P	P	B, A
The largest dimensions of processed products (length x width x height), mm	1000 x 360 x 400	1000 x 320 x 400	1250 x 320 x 400
The largest dimensions of processed products on an electromagnetic plate (length x width x height), mm	900 x 320 x 280	1250 x 320 x 280
The smallest dimensions of processed products on an electromagnetic plate (length x width x height), mm	50 x 40 x 5	50 x 40 x 3
Distance from the spindle axis to the table mirror, mm	190..630	210..625	210..625
The largest mass of products processed on the table, kg	600	600
The largest mass of products processed on an electromagnetic plate, kg	300	400
Machine work table
Dimensions of the working surface of the table (length x width), mm	1000 x 320	1000 x 320	1000 x 320
Surface dimensions of the electromagnetic plate (length x width), mm	900 x 320	900 x 320
Longitudinal movement of the table from hydraulics (minimum/maximum, mm	300..1050	300..1010
Speed of reciprocating table movement (stepless regulation), m/min	2..40	3..45	3..35
Grinding head
Grinding wheel dimensions (smallest and largest outer diameters), mm	325…450
Grinding wheel dimensions (internal diameter/height), mm	203/ 63
Grinding wheel dimensions according to GOST 2424-75	PP450x80x203	PP450x80x203
Grinding wheel revolutions per minute	1460	1460	1460
Maximum permissible torque on the spindle, kgf*m	6,7
Highest grinding speed, m/s	34,4
The end of the spindle of the grinding head according to GOST 2323-67, GOST 2323-76 (design/taper/largest diameter)	1/ 1:5/ 80	1/ 1:5/ 80
Maximum transverse movement of the grinding headstock (stand), mm	400	410	430
The price of dividing the dial for the transverse movement of the grinding head, mm	0,05
Transverse movement of the grinding head per one revolution of the dial, mm	4,5
Accelerated transverse movement of the grinding head, m/min	1,2
Limits of cross-feed speeds of the grinding headstock (stepless control), m/min	0,05..3,0	0,5..3,0
Automatic cross feed for each table stroke (stepless control), mm/stroke	1..30	2..48	1..60
Maximum vertical movement of the grinding head, mm	440	415	415
The price of dividing the dial for the vertical movement of the grinding head, mm	0,005	0,004	0,002
Vertical movement of the grinding head per one revolution of the dial, mm	1,0	0,5	0,2
Automatic vertical feeds of the grinding head, mm	0,005..0,1	0,004..0,1	0,002..0,128
Speed of vertical accelerated movement, m/min	0,450	0,450	0,200
Drive and electrical equipment of the machine
Number of electric motors on the machine	6	8	13
Grinding head spindle electric motor (M1), kW	10	15	11
Hydraulic system pump electric motor (M2) (hydraulic station), kW	5,5	7,5	4,0
Electric motors of the air heat exchanger (M3, M11) (hydraulic station), kW	No	0,12	0,09
Electric motor of the lubrication system pump (M4), kW	0,12	0,25	0,25
Electric motor drive of the wheel dressing mechanism (M5), kW	0,09
Electric motor of the cooling system pump (M6), kW	0,12	0,6	0,75
Magnetic separator electric motor (M7), kW	0,12	0,12	0,12
Conveyor filter motor (M8), kW	No	0,12	0,09
Electric motor for adjusting the table speed throttle (M9) (hydraulic station), kW
Electric motor of oil cooling pump (M10) hydraulic station, kW	1,1
Electric motor for vertical accelerated movement of the grinding head (M12), kW	1,1	0,75	0,6
Electric motor for driving the cross feed of the rack (M13), kW	0,75
Electric motor for vertical feed of the grinding head (M14), kW	stepper
Leakage pump electric motor, kW	No	0,25	No
Total installed power of all electric motors, kW	3,685	18,25
type of supply current	50Hz, 380V	50Hz, 380V	50Hz, 380V
Dimensions and weight of the machine
Machine dimensions (length x width x height), mm	3410 x 2021 x 2290	3510 x 2130 x 2360	4810 x 2660 x 2660
Machine weight, kg	6950	8400	7000

Bibliography:

Longitudinal grinding machine 3B722. Operating manual, 1978
Longitudinal grinding machine 3B722. Operating manual, 1973
Surface grinding machines 3B722, 3722. Album of drawings of wear and spare parts
Alperovich T.A., Konstantinov K.N., Shapiro A.Ya. Design of grinding machines, 1989
Alperovich T.A., Konstantinov K.N., Shapiro A.Ya. Setup 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 grinding machines, 1965
Kashchuk V.A., Vereshchagin A.B. Grinder's Handbook, 1988
Kulikov S.I. Honing, 1973
Lisova A.I. Design, 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. Design of grinding machines, 1983
Menitsky I.D. Universal sharpening machines, 1968
Mutsyanko V.I. Bratchikov A.Ya. Centerless grinding, 1986
Naerman M.S., Naerman Ya.M. Guide for training grinders. Textbook for vocational schools, 1989
Naerman E.S. The Young Grinder's Handbook, 1991.
Popov S.A. Grinding work, 1987
Tergan V.S. Grinding on cylindrical grinding machines, 1972
Shamov B.P. Types and designs of main components of grinding machines, 1965

Instructions for operation, maintenance and repair of the 3L722V machine

The machines are designed for operation in UHL4 conditions according to GOST 15150-69.
The grinding wheel must be straightened before being put into operation. Conditions, mode and tool according to the requirements of RTM2 I77-9-79.

The grinding wheel must be balanced before and after dressing.

The assignment of cutting modes should be made based on the characteristics of the wheel, the material of the product, and the technical requirements for processing.

When rough grinding, it is recommended to work with the highest depth of cut allowed by the wheel, product, or machine.

When finishing grinding, the depth of cut is chosen to be very small. This improves accuracy and reduces the roughness of the machined surface.

The speed of the product is assigned based on the fact that increasing it improves heat removal, increases productivity, and reduces the formation of burns. With increased requirements for surface roughness, lower speed values should be taken.

Grinding with a peripheral speed of the circle higher than 34.4 m/s on the machine is not allowed!

When operating the machine and observing preventive measures, the service life of the machine before the first major overhaul (overhaul cycle period) is equal to two years when working in two shifts.

Machine repair complexity category:

mechanical part - 24,
electrical part - 46.

When dismantling the slide, it is necessary to unfasten the nut bracket of the “screw-nut” pair of rolling elements from the slide.

When replacing the electric motor of the grinding wheel drive, it is necessary to perform dynamic balancing using crackers on the disk and weights on the electric motor fan.

Control of balancing and vibration level should be carried out in two planes (along the rear and front support of the electric motor rotor) along the vertical, horizontal, longitudinal and transverse axes.

Effective values of vibration velocity should not exceed 1.1 mm/s, double amplitude 10 µm.

When assembling the coupling halves, you need to orient them relative to each other using the marks.

The grinding head assembly with the wheel must be dynamically balanced at the strike along the vertical, horizontal, transverse and longitudinal axes in the plane of the front spindle support using weights on the faceplate of the grinding wheel. The double amplitude of vibrations should not exceed 5 µm.

When installing and dismantling the table, you need to pay attention to the position of the rack and the gear wheel of the table synchronizer. If the position of the rack and gear changes during table installation, then the remote control device for table movement should be adjusted in the following sequence:

remove the bottom panel of the control panel;
check the correct connection of the phases of the selsyn sensor and the selsyn receiver;
Having first slightly unscrewed the fingers on the disks, remove the limiters from the synchronizer receivers;
loosen the screws securing the stop and move it up;
press the “Table Left” button and keep it pressed until the table moves to the far left position. After that, without releasing the “Table Left” button, press the “Table Stop” button. Release the “Table left” button;
By rotating the rotor of the synchronizer-receiver, make sure that for a full rotation, lamp 15 (see Fig. 5) is on half the time, and half the time is off. After this, you need to bring the rotor of the synchronizer-receiver to the area where the lamp is extinguished, and by rotating it clockwise, make the lamp light up. This position of the rotor of the synchronizer-receiver “corresponds to the reverse command “Right”;
Carry out the same operation when setting the table reverse “Left”;

Check that the device is configured correctly.

To do this, set the minimum table speed using the throttle switch and press the “Table Left” button.

If configured correctly, the table should automatically reverse at the configured points;

Stop the table. While holding the rotors of the synchronizers from turning, put the discs on in the position where the fingers touch the stop.

Screwing in the fingers, lock the discs. Lower the stop down and tighten the screws. Let the table go. Reverse must be performed with the grinding wheel leaving the table mirror area.

Set the throttle switch to maximum table speed.

When installing and dismantling the cross feed units of the rack, it is necessary to carry out adjustments similar to the previous paragraph 10.10.

To ensure that the spindle axis is parallel to the working surface of the table, make adjustments using wedges 7 (see Fig. 7). The wedge tightening torque is no more than 160 kgf.m.