Full-automatic thickness measuring four-axis grinding machine

Abstract

The utility model relates to the technical field of steel plate grinding, in particular to a full-automatic thickness measuring four-shaft grinding machine which comprises a machine body and a conveying mechanism arranged on the machine body. The machine body is further provided with a three-point thickness measuring mechanism, a first lower grinding mechanism, a first upper grinding mechanism, a second lower grinding mechanism and a second upper grinding mechanism, the three-point thickness measuring mechanism comprises a thickness measuring frame and three thickness measuring modules arranged on the thickness measuring frame at intervals, and each thickness measuring module comprises a contact roller, a thickness measuring sensor and a telescopic mechanism. The contact roller is arranged on the thickness measuring frame in a lifting mode through the telescopic mechanism, and the thickness measuring sensor is installed on the thickness measuring frame and used for sensing the lifting amplitude of the contact roller. According to the utility model, through the arrangement of the three-point thickness measuring mechanism, the contact roller is in direct contact with three different positions of the steel plate, and the thickness of the steel plate can be obtained through the lifting amplitude of the contact roller, so that the influence of the environment on thickness measurement can be effectively avoided, and the thickness measurement precision is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel plate grinding technical field especially is a kind of full-automatic thickness measuring four-axis grinding machine. BACKGROUND

[0002] At present, for steel plate grinding, usually adopt multi-axis grinding equipment to grind the single side or double side of steel plate respectively, to realize automation work, improve efficiency and grinding quality. And the existing multi-axis grinding equipment, usually adopts infrared way to realize the thickness measurement of steel plate, then adjusts the height of grinding mechanism according to the thickness measurement result, to ensure that grinding effect is not let grinding mechanism and steel plate have strong rigid collision, reach the effect of protecting grinding mechanism and steel plate.

[0003] However, infrared thickness measurement is susceptible to the influence of surrounding environment, and in the process of steel plate grinding, the debris and splashed lubricating liquid generated can cause the environment near infrared thickness measurement to be relatively poor, thereby affecting the actual effect of thickness measurement. SUMMARY

[0004] The utility model provides a kind of full-automatic thickness measuring four-axis grinding machine for the problems of prior art, realizes thickness measurement using mechanical contact mode, reduces the influence of environment on thickness measurement.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The utility model provides a kind of full-automatic thickness measuring four-axis grinding machine, including body and the transmission mechanism being arranged in body, along the transmission direction of transmission mechanism, the body is further provided with three-point thickness measuring mechanism, first lower grinding mechanism, first upper grinding mechanism, second lower grinding mechanism and second upper grinding mechanism, three-point thickness measuring mechanism is used to sense the thickness of three positions of steel plate, first lower grinding mechanism, first upper grinding mechanism, second lower grinding mechanism and second upper grinding mechanism are used to grind two surfaces of steel plate respectively, first lower grinding mechanism, first upper grinding mechanism, second lower grinding mechanism and second upper grinding mechanism are equipped with height-adjusting mechanism respectively;

[0007] The three-point thickness measuring mechanism includes thickness measuring frame and three thickness measuring modules being spaced apart on the thickness measuring frame, and the thickness measuring module includes a contact roller, a thickness sensing device and an extension mechanism, the contact roller is arranged on the thickness measuring frame by the extension mechanism, the thickness sensing device is installed on the thickness measuring frame, and the thickness sensing device is used to sense the lifting amplitude of the contact roller.

[0008] Further, the telescopic mechanism comprises a rotating frame, an elastic member, a limiting member and a limiting sleeve, the limiting sleeve is arranged on the thickness measuring frame, the limiting member is movably arranged on the thickness measuring frame and located in the limiting sleeve, the limiting sleeve is used for preventing the limiting member from being separated from the rotating frame, the bottom of the limiting member is connected with the rotating frame after penetrating through the bottom of the thickness measuring frame, the elastic member is arranged between the rotating frame and the thickness measuring frame, the contact roller is rotatably arranged on the rotating frame, and the thickness measuring sensor is used for sensing the lifting amplitude of the rotating frame.

[0009] Further, the top of the rotating frame is provided with a triggering member, the thickness measuring sensor has a probe, the probe protrudes out of the bottom of the thickness measuring frame, and the probe is arranged opposite to the triggering member.

[0010] Further, the thickness measuring module further comprises a lifting seat and a limiting pin, the lifting seat is provided with a lifting groove, the thickness measuring frame is provided with a lifting hole, the limiting pin is installed in the lifting hole after penetrating through the lifting groove, and the thickness measuring sensor is arranged on the lifting seat.

[0011] The thickness measuring sensor is used for abutting against the triggering member and being lifted by the triggering member.

[0012] Further, the first lower grinding mechanism, the first upper grinding mechanism, the second lower grinding mechanism and the second upper grinding mechanism respectively have a grinding roller and a driving module for driving the grinding roller to rotate, the height adjusting mechanism comprises a driving motor, a speed reducer, a transmission shaft and two lifting speed reducers, the driving motor is drivingly connected with one lifting speed reducer through the speed reducer, the transmission shaft is connected between the two lifting speed reducers, each lifting speed reducer is drivingly connected with a height adjusting seat, the height adjusting seat is provided with a bearing seat, the two ends of the grinding roller are rotatably arranged in the bearing seats of the two height adjusting modules, and the linear driving member is signal-connected with the three-point thickness measuring mechanism.

[0013] Further, the driving module comprises a rotating motor, a rotating belt, a swinging motor and an eccentric transmission structure, the height adjusting seat is provided with a guide rail, and the bearing seat is slidingly arranged in the guide rail; the rotating motor is drivingly connected with one end of the grinding roller through the rotating belt, and the swinging motor is drivingly connected with the bearing seat connected with the other end of the grinding roller through the eccentric transmission structure.

[0014] Further, the driving module further comprises a support seat, the rotating motor is installed on the support seat, the support seat is provided with a plurality of support shafts, and the support shafts penetrate through the support seat; the portions of the support shafts above and below the support seat are respectively sleeved with first springs, and the bottom of the support seat is provided with at least one second spring.

[0015] Further, the machine body is further provided with a liquid spraying mechanism for spraying lubricating liquid on the steel plate, the liquid spraying mechanism comprises a liquid conveying pipe and n liquid spraying pipes, the n liquid spraying pipes are in communication with the liquid conveying pipe, the liquid conveying pipe is used for being externally connected with a liquid source, the output end of the liquid spraying pipe extends into the machine body, a spray head is installed on the output end of the liquid spraying pipe, and the spray head faces the grinding shaft.

[0016] n is an integer not less than 4.

[0017] Further, the liquid spraying mechanism further comprises a recovery pipe, the bottom of the body is inclined from the side to the middle, the middle of the bottom of the body is provided with a collecting port, the recovery pipe is communicated with the collecting port, and the recovery pipe is used for transmitting the recovered lubricating liquid to a liquid source outside.

[0018] Further, a plurality of limiting shafts are arranged in the body, and quick release structures are arranged at two ends of each limiting shaft.

[0019] The utility model discloses the beneficial effect: the utility model discloses through the setting of three point thickness measuring mechanism, utilize contact roll and steel plate three different positions direct contact, through the amplitude of contact roll lifting can obtain the thickness of steel plate, thereby can effectively avoid the influence that the environment causes to the thickness measurement, guarantee the precision of thickness measurement. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the schematic diagram of the utility model.

[0021] Figure 2 It is the schematic diagram of the three point thickness measuring mechanism of the utility model.

[0022] Figure 3 It is another perspective schematic drawing of the utility model. Figure 2

[0023] Figure 4 It is the enlarged view of A of the utility model. Figure 3

[0024] Figure 5 It is the schematic diagram of the thickness measurement module of the utility model.

[0025] Figure 6 It is the cooperation schematic drawing of the first lower grinding mechanism and height adjusting mechanism of the utility model.

[0026] Figure 7 It is the schematic diagram of the supporting seat of the utility model.

[0027] Figure 8 It is the schematic diagram of the liquid spraying mechanism of the utility model.

[0028] Figure 9 It is the schematic diagram of the limiting shaft of the utility model.

[0029] ​​Reference numerals: 1—Machine body, 2—Transmission mechanism, 3—Three-point thickness measuring mechanism, 4—First lower grinding mechanism, 5—First upper grinding mechanism, 6—Second lower grinding mechanism, 7—Second upper grinding mechanism, 8—Height adjustment mechanism, 9—Spraying mechanism, 11—Limiting shaft, 12—Quick release structure, 31—Thickness measuring frame, 32—Thickness measuring module, 33—Contact roller, 34—Thickness sensor, 35—Telescopic mechanism, 36—Lifting seat, 37—Limiting pin, 41—Grinding roller, 42—Drive module, 81—Drive motor, 82—Reducer, 83—Transmission shaft, 84—Lifting reducer, 85— 86—Height adjustment seat, 87—Bearing seat, 91—Guide rail, 92—Infusion pipe, 93—Spray pipe, 94—Recovery pipe, 341—Probe, 351—Rotating frame, 352—Elastic element, 353—Limiting element, 354—Limiting sleeve, 355—Triggering element, 356—Anti-detachment cap, 361—Lifting groove, 362—Limiting part, 363—Limiting column, 421—Rotating motor, 422—Rotating belt, 423—Oscillating motor, 424—Eccentric transmission structure, 425—Support seat, 426—Support shaft, 427—First spring, 428—Second spring. Detailed Implementation

[0030] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0031] like Figures 1 to 9 As shown, the present invention provides a fully automatic four-axis thickness measuring grinding machine, including a machine body 1 and a transmission mechanism 2 disposed on the machine body 1. Along the transmission direction of the transmission mechanism 2, the machine body 1 is also provided with a three-point thickness measuring mechanism 3, a first lower grinding mechanism 4, a first upper grinding mechanism 5, a second lower grinding mechanism 6, and a second upper grinding mechanism 7. The three-point thickness measuring mechanism 3 is used to sense the thickness of the steel plate at three positions. The first lower grinding mechanism 4, the first upper grinding mechanism 5, the second lower grinding mechanism 6, and the second upper grinding mechanism 7 are respectively used to grind the two surfaces of the steel plate. The first lower grinding mechanism 4, the first upper grinding mechanism 5, the second lower grinding mechanism 6, and the second upper grinding mechanism 7 are respectively provided with a height adjustment mechanism 8.

[0032] During operation, the steel plate is transported to the machine body 1 via the transmission mechanism 2. First, the thickness of the steel plate is measured at three positions by the three-point thickness measuring mechanism 3. Then, the first lower grinding mechanism 4, the first upper grinding mechanism 5, the second lower grinding mechanism 6, and the second upper grinding mechanism 7 are adjusted in height by the corresponding height adjustment mechanism 8 to ensure that the steel plate can pass through smoothly and be ground, thus ensuring grinding safety and grinding quality. The ground steel plate is then transported to the outside for the next step.

[0033] In the embodiment, the three-point thickness measuring mechanism 3 comprises a thickness measuring frame 31 and three thickness measuring modules 32 arranged at intervals on the thickness measuring frame 31, each thickness measuring module 32 comprising a contact roller 33, a thickness measuring sensor 34 and an extension mechanism 35, the contact roller 33 being arranged on the thickness measuring frame 31 in a liftable manner through the extension mechanism 35, and the thickness measuring sensor 34 being installed on the thickness measuring frame 31 and used to sense the lifting amplitude of the contact roller 33.

[0034] In actual application, the length direction of the thickness measuring frame 31 is perpendicular to the transmission direction of the steel plate, and the three thickness measuring modules 32 are arranged in sequence along the length direction of the thickness measuring frame 31. When the steel plate is transmitted, the steel plate will pass through the three thickness measuring modules 32, and the three positions of the steel plate will be contacted by the contact rollers 33 of the three thickness measuring modules 32 respectively, and the contact positions will be changed constantly along with the transmission of the steel plate. The contact roller 33 will be lifted due to the abutment of the steel plate, and the thickness measuring sensor 34 will measure the lifting amplitude of the contact roller 33, and the thickness of the steel plate can be calculated by combining the preset value, so that the thickness changes of the steel plate in the transmission direction of the three positions can be measured and uploaded, and the more accurate thickness details of the steel plate can be obtained reliably. In addition, since the thickness of the steel plate is measured by the mechanical contact method, the accuracy of the measurement will not be affected by the particulate matters in the air.

[0035] In the above process, when the contact roller 33 contacts the steel plate, the contact roller 33 will be lifted due to the abutment of the steel plate, but the contact roller 33 will be in an unstable state due to the influence of inertia, gravity and other factors. Therefore, the change of the height of the contact roller 33 will trigger the change of the thickness measuring sensor 34, and after t time is elapsed to ensure that the contact roller 33 is stable, the signal change of the thickness measuring sensor 34 is obtained to ensure the accuracy of the measured information.

[0036] Preferably, the time t can be set according to the actual component parameters, and is usually between 0.05-0.3s. When the contact roller 33 contacts the steel plate, the steel plate will stop moving for the above-mentioned time t to allow the contact roller 33 to enter a steady state, and then the steel plate will continue to move to ensure that the contact roller 33 can measure the different area positions of the corresponding position of the steel plate in the length direction, so that the thickness parameters of the whole steel plate can be obtained as much as possible through the cooperation of the three contact rollers 33.

[0037] In the embodiment, the telescopic mechanism 35 comprises a rotating frame 351, an elastic member 352, a limiting member 353 and a limiting sleeve 354. The limiting sleeve 354 is arranged on the thickness measuring frame 31. The limiting member 353 is movably arranged on the thickness measuring frame 31 and located in the limiting sleeve 354. The limiting sleeve 354 is used to prevent the limiting member 353 from being separated from the rotating frame 351. The bottom of the limiting member 353 is connected with the rotating frame 351 after penetrating through the bottom of the thickness measuring frame 31. The elastic member 352 is arranged between the rotating frame 351 and the thickness measuring frame 31. The contact roller 33 is rotatably arranged on the rotating frame 351. The thickness measuring sensor 34 is used to sense the lifting amplitude of the rotating frame 351.

[0038] That is, the contact roller 33 is rotatably arranged on the rotating frame 351, so that the contact roller 33 can rotate with the transmission of the steel plate, thereby reducing the friction between the contact roller 33 and the steel plate, and facilitating the reduction of wear. In this process, the elastic member 352 plays a retaining role, that is, the stability of the contact roller 33 is ensured by the elastic force, so as to avoid that the contact roller 33 jumps too much and affects the measurement result.

[0039] The top of the limiting member 353 is provided with a separation-preventing cap 356. The width of the separation-preventing cap 356 is greater than the inner diameter of the limiting sleeve 354, which is used to prevent the limiting member 353 from being separated from the limiting sleeve 354. Since the rotating frame 351 and the contact roller 33 are synchronously lifted, the thickness measuring sensor 34 actually measures the lifting amplitude of the rotating frame 351. Compared with the lifting amplitude of the rotating contact roller 33, the measurement result is more stable.

[0040] Preferably, the number of the limiting member 353, the limiting sleeve 354 and the elastic member 352 is two, which can effectively ensure the stability of the thickness measuring module 32.

[0041] Specifically, the elastic member 352 comprises a spring. The elastic member 352 is sleeved on one end of the limiting member 353 protruding from the bottom of the thickness measuring frame 31. The two ends of the elastic member 352 are respectively connected with / abut against the thickness measuring frame 31 and the rotating frame 351. That is, the elastic member 352 is directly sleeved on the limiting member 353, which can better realize the buffering and retaining effect.

[0042] Specifically, the top of the rotating frame 351 is provided with a triggering member 355. The thickness measuring sensor 34 has a probe 341 protruding from the bottom of the thickness measuring frame 31. The probe 341 is arranged opposite to the triggering member 355.

[0043] The thickness measuring sensor 34 is preferably a contact sensor. The thickness of the steel plate is inversely deduced by the height forced to rise after the probe 341 is abutted. The triggering member 355 is preferably rotatably connected with the rotating frame 351. The triggering member 355 with a suitable height can be replaced according to the actual need of the measured steel plate, so as to use without the need to improve the flexibility of the utility model.

[0044] In the embodiment, the thickness measuring module 32 further comprises a lifting seat 36 and a limiting pin 37, the lifting seat 36 is provided with a lifting groove 361, the thickness measuring frame 31 is provided with a lifting hole, the limiting pin 37 is installed in the lifting hole after passing through the lifting groove 361, and the thickness measuring sensor 34 is installed on the lifting seat 36.

[0045] The thickness measuring sensor 34 is used to contact the probe 341 and is lifted by the probe 341.

[0046] That is, the thickness measuring sensor 34 is a floating structure, mainly when the thickness of the steel plate is within a certain range, the lifting of the probe 341 will not affect the height change of the thickness measuring sensor 34; when the thickness of a certain steel plate is too large and exceeds the stroke of the probe 341, the entire lifting seat 36 will be lifted together, at this time, the lifting of the lifting seat 36 can effectively avoid the damage of the thickness measuring sensor 34, and the effect of floating protection of the thickness measuring sensor 34 is achieved.

[0047] Specifically, the lifting seat 36 has a limiting portion 362, the bottom of the limiting portion 362 is provided with a limiting column 363, and the limiting column 363 is used to contact the thickness measuring frame 31 to prevent the lifting seat 36 from descending too much. That is, the shape of the limiting portion 362 is similar to a "7" shaped structure, and the limiting column 363 is arranged below the top of the "7" to limit the descending range of the lifting seat 36; and the limiting column 363 is preferably fixed with the limiting portion 362 by screws or screwing, so as to adjust the height of the limiting column 363 and replace the limiting column 363.

[0048] Specifically, the bottom of the limiting piece 353 is screwed with the rotating frame 351, and the appropriate limiting piece 353 can be replaced and used as needed.

[0049] In the embodiment, the first lower grinding mechanism 4, the first upper grinding mechanism 5, the second lower grinding mechanism 6 and the second upper grinding mechanism 7 respectively have a grinding roller 41 and a driving module 42 for driving the grinding roller 41 to rotate, the height adjusting mechanism 8 comprises a driving motor 81, a speed reducer 82, a transmission shaft 83 and two lifting speed reducers 84, the driving motor 81 is drivingly connected with one lifting speed reducer 84 through the speed reducer 82, the transmission shaft 83 is connected between the two lifting speed reducers 84, and each lifting speed reducer 84 is drivingly connected with a height adjusting seat 85, and the height adjusting seat 85 is provided with a bearing seat 86, and the two ends of the grinding roller 41 are respectively rotationally arranged in the bearing seats 86 of the two height adjusting modules, and the linear driving member is signal connected with the three-point thickness measuring mechanism 3.

[0050] The height adjusting mechanism 8 is driven by the driving motor 81, drives the two lifting speed reducers 84 to perform the same action through the speed reducer 82, so that the lifting range of the two ends of the grinding roller 41 is basically consistent, and the stability is ensured.

[0051] Specifically, the driving module 42 comprises a rotating motor 421, a rotating belt 422, a swinging motor 423 and an eccentric transmission structure 424, the height-adjusting seat 85 is provided with a guide rail 87, and the bearing seat 86 is slidingly arranged on the guide rail 87; the rotating motor 421 is drivingly connected to one end of the grinding roller 41 through the rotating belt 422, and the swinging motor 423 is drivingly connected to the bearing seat 86 connected to the other end of the grinding roller 41 through the eccentric transmission structure 424.

[0052] In actual use, the swinging motor 423 is installed on the bearing seat 86.

[0053] That is, during grinding, the rotating motor 421 drives the rotating belt 422 in a manner, which drives the grinding roller 41 to rotate, thereby realizing the grinding effect on the steel plate. In order to achieve better grinding effect, the utility model also provides the swinging motor 423 and the eccentric transmission structure 424, which drives the eccentric transmission structure to move back and forth along the length direction of the guide rail 87, that is, the grinding roller 41 moves along the direction perpendicular to the transmission direction of the steel plate in addition to rotation, so that the relative movement direction of the grinding roller 41 and the steel plate is not only one, which is beneficial to improve the grinding effect.

[0054] The direction of the back-and-forth movement of the grinding roller 41 is usually below 1cm, which can achieve the desired effect.

[0055] Specifically, the driving module 42 further comprises a support seat 425, the rotating motor 421 is installed on the support seat 425, the support seat 425 is provided with a plurality of support shafts 426, and the support shafts 426 penetrate through the support seat 425; the portions of the support shafts 426 above and below the support seat 425 are respectively sleeved with first springs 427, and the bottom of the support seat 425 is provided with at least one second spring 428.

[0056] That is, when the bearing seat 86 is lifted, the tension of the rotating belt 422 will inevitably change. Compared with the tension control mode of the existing technology using a tensioning wheel, the utility model uses the support seat 425, that is, the first springs 427 and the second springs 428 of the support seat 425 cooperate to realize the tension control of the rotating belt 422: taking the driving of the grinding roller 41 upward by the height-adjusting mechanism 8 as an example, when the grinding roller 41 is lifted, the rotating belt 422 will inevitably be pulled by the grinding roller 41, which is equivalent to that the grinding roller 41 “pulls” the rotating motor 421 upward through the rotating belt 422. At this time, the first springs 427 and the second springs 428 are restored to a certain extent due to the reduction of the pressure of the rotating motor 421, so as to cooperate with the rotating belt 422 to lift the rotating motor 421 to a certain height, thereby realizing the effect of keeping the tension of the rotating belt 422 from changing too much.

[0057] Specifically, the machine body 1 is further provided with a liquid spraying mechanism 9 for spraying lubricating liquid on the steel plate, the liquid spraying mechanism 9 comprises a liquid supply pipe 91 and n liquid spraying pipes 92, the n liquid spraying pipes 92 are all communicated with the liquid supply pipe 91, the liquid supply pipe 91 is used for connecting with a liquid source, the output end of the liquid spraying pipe 92 extends into the machine body 1, and a spraying head 93 is mounted on the output end of the liquid spraying pipe 92 and faces the grinding shaft.

[0058] n is an integer not less than 4.

[0059] In the embodiment, n = 8, that is, one grinding mechanism corresponds to two liquid spraying pipes 92, and the spraying head 93 of the liquid spraying pipe 92 sprays lubricating liquid on the grinding roller 41 of the grinding mechanism, so that the friction of the contact position between the steel plate and the grinding roller 41 is reduced, thereby avoiding that the grinding roller 41 is worn too fast.

[0060] Specifically, the liquid spraying mechanism 9 further comprises a recovery pipe 94, the bottom of the machine body 1 is inclined from the side to the middle, the middle of the bottom of the machine body 1 is provided with a collecting opening, the recovery pipe 94 is communicated with the collecting opening, and the recovery pipe 94 is used for transmitting the recovered lubricating liquid to the liquid source outside.

[0061] The lubricating liquid falling on the bottom of the machine body 1 is guided to the collecting opening by the funnel-like structure of the bottom of the machine body 1, and the lubricating liquid is recovered through the recovery pipe 94, so that the lubricating liquid is prevented from remaining in the machine body 1 and the recycling of the lubricating liquid is realized.

[0062] In the embodiment, a plurality of limiting shafts 11 are arranged in the machine body 1, the two ends of each limiting shaft 11 are respectively provided with quick release structures 12, and the limiting shaft 11 is connected with the machine body 1 through the quick release structures 12.

[0063] The limiting shaft 11 is used for cooperating with the grinding roller 41 to “clamp” the steel plate, so as to ensure reliable grinding of the steel plate, and the assembly of the limiting shaft 11 is realized through the quick release structure 12. Figure 9 The disclosed structure is that the staff only needs to pull the rotating quick release structure 12 to realize the assembly and disassembly of the limiting shaft 11, so that the replacement of the limiting shaft 11 is facilitated, and the efficiency is improved.

[0064] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as above, it is not used to limit the utility model. Any skilled person in the art can make some changes or modifications to the disclosed technical content without departing from the technical scheme of the utility model, and the equivalent embodiments with equivalent changes are equivalent. Any simple modification, equivalent change and modification of the above embodiment belong to the scope of the technical scheme of the utility model.

Claims

1. A full-automatic thickness measuring four-axis grinding machine, comprising a machine body and a transmission mechanism arranged on the machine body, characterized in that: Along the conveying direction of the conveying mechanism, the machine body is further provided with a three-point thickness measuring mechanism, a first lower grinding mechanism, a first upper grinding mechanism, a second lower grinding mechanism and a second upper grinding mechanism, the three-point thickness measuring mechanism is used for sensing the thickness of the steel plate at three positions, the first lower grinding mechanism, the first upper grinding mechanism, the second lower grinding mechanism and the second upper grinding mechanism are respectively used for grinding the two surfaces of the steel plate, and the first lower grinding mechanism, the first upper grinding mechanism, the second lower grinding mechanism and the second upper grinding mechanism are respectively provided with height adjusting mechanisms. The three-point thickness measuring mechanism comprises a thickness measuring frame and three thickness measuring modules arranged at intervals on the thickness measuring frame, the thickness measuring module comprises a contact roller, a thickness measuring sensor and an extension mechanism, the contact roller is arranged on the thickness measuring frame in a liftable manner through the extension mechanism, the thickness measuring sensor is mounted on the thickness measuring frame, and the thickness measuring sensor is used for sensing the lifting amplitude of the contact roller.

2. The fully automatic thickness measuring four-axis lapping machine according to claim 1, characterized in that: The extension mechanism comprises a rotating frame, an elastic member, a limiting member and a limiting sleeve, the limiting sleeve is mounted on the thickness measuring frame, the limiting member is movably arranged on the thickness measuring frame and located in the limiting sleeve, the limiting sleeve is used for preventing the limiting member from being separated from the rotating frame, the bottom of the limiting member is connected with the rotating frame after penetrating through the bottom of the thickness measuring frame, the elastic member is arranged between the rotating frame and the thickness measuring frame, the contact roller is rotatably arranged on the rotating frame, and the thickness measuring sensor is used for sensing the lifting amplitude of the rotating frame.

3. The fully automatic thickness measuring four-axis lapping machine according to claim 2, characterized in that: The top of the rotating frame is provided with a trigger, the thickness measuring sensor has a probe, the probe protrudes out of the bottom of the thickness measuring frame, and the probe is arranged opposite to the trigger.

4. The fully automatic thickness measuring four-axis lapping machine according to claim 3, characterized in that: The thickness measuring module further comprises a lifting seat and a limiting pin, the lifting seat is provided with a lifting groove, the thickness measuring frame is provided with a lifting hole, the limiting pin is mounted on the lifting hole after penetrating through the lifting groove, and the thickness measuring sensor is mounted on the lifting seat. The thickness measuring sensor is used for abutting against the trigger and being lifted by the trigger.

5. The fully automatic thickness measuring four-axis lapping machine according to claim 1, characterized in that: The first lower grinding mechanism, the first upper grinding mechanism, the second lower grinding mechanism and the second upper grinding mechanism respectively have a grinding roller and a driving module for driving the grinding roller to rotate, the height adjusting mechanism comprises a driving motor, a speed reducer, a transmission shaft and two lifting speed reducers, the driving motor is drivingly connected with one lifting speed reducer through the speed reducer, the transmission shaft is connected between the two lifting speed reducers, each lifting speed reducer is drivingly connected with a height adjusting seat, the height adjusting seat is provided with a bearing seat, the two ends of the grinding roller are rotatably arranged in the bearing seats of the two height adjusting modules, and the linear driving member is signal connected with the three-point thickness measuring mechanism.

6. The fully automatic thickness measuring four-axis lapping machine according to claim 5, characterized in that: The driving module comprises a rotating motor, a rotating belt, a swinging motor and an eccentric transmission structure, the height adjusting seat is provided with a guide rail, and the bearing seat is slidingly arranged on the guide rail; one end of the grinding roller is drivingly connected with the rotating motor through the rotating belt, and the bearing seat connected with the other end of the grinding roller is drivingly connected with the swinging motor through the eccentric transmission structure.

7. The fully automatic thickness measuring four-axis lapping machine according to claim 6, characterized in that: The driving module further comprises a support seat, the rotating motor is mounted on the support seat, the support seat is provided with a plurality of support shafts, and the support shafts penetrate through the support seat; the portions of the support shafts above and below the support seat are respectively sleeved with first springs, and the bottom of the support seat is provided with at least one second spring.

8. The fully automatic thickness measuring four-axis lapping machine according to claim 5, characterized in that: The machine body is further provided with a liquid spraying mechanism for spraying lubricating liquid on the steel plate, the liquid spraying mechanism comprising a liquid delivery pipe and n liquid spraying pipes, the n liquid spraying pipes being in communication with the liquid delivery pipe, the liquid delivery pipe being used for connecting with a liquid source outside, the output end of each liquid spraying pipe extending into the machine body, and a spraying head being mounted on the output end of each liquid spraying pipe and facing the grinding shaft. n is an integer not less than 4.

9. The fully automatic thickness measuring four-axis lapping machine according to claim 8, characterized in that: The liquid spraying mechanism further comprises a recovery pipe, the bottom of the machine body is inclined from the side edge to the middle, a collecting opening is arranged in the middle of the bottom of the machine body, the recovery pipe is in communication with the collecting opening, and the recovery pipe is used for transmitting the recovered lubricating liquid to the liquid source outside.

10. The fully automatic thickness measuring four-axis lapping machine according to claim 1, characterized in that: A plurality of limiting shafts are arranged in the machine body, each limiting shaft is provided with a quick release structure at both ends, and the limiting shafts are connected with the machine body through the quick release structures.

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