Fully automatic thickness measurement four-axis grinding machine

Abstract

The present invention relates to the technical field of steel plate grinding, and more particularly to a fully automatic four-axis grinding machine with thickness measurement, comprising a machine body and a transmission mechanism disposed on the machine body. Along the transmission direction of the transmission mechanism, the machine body is further provided with a three-point thickness measurement 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 measurement mechanism comprises a thickness measurement frame and three thickness measurement modules spaced apart from the thickness measurement frame. The thickness measurement module comprises a contact roller, a thickness measurement sensor, and a telescopic mechanism. The contact roller can be raised and lowered on the thickness measurement frame via the telescopic mechanism. The thickness measurement sensor is mounted on the thickness measurement frame and is used to sense the raising and lowering amplitude of the contact roller. The present invention utilizes the three-point thickness measurement mechanism to directly contact the contact roller with three different positions of the steel plate. The thickness of the steel plate can be determined by the raising and lowering amplitude of the contact roller, thereby effectively avoiding the influence of the environment on the thickness measurement and ensuring the accuracy of the thickness measurement.

Description

Technical Field

[0001] The invention relates to the technical field of steel plate grinding, in particular to a full-automatic thickness measuring four-axis grinding machine. Background Art

[0002] Currently, multi-axis grinding equipment is typically used to grind steel plates on one or both sides of the plate, achieving automation and improving efficiency and grinding quality. Existing multi-axis grinding equipment typically uses infrared technology to measure the thickness of the steel plate. The height of the grinding mechanism is then adjusted based on the thickness measurement results to ensure effective grinding while preventing strong rigid collisions between the grinding mechanism and the steel plate, thereby protecting both the grinding mechanism and the steel plate.

[0003] However, infrared thickness measurement is easily affected by the surrounding environment. During the steel plate grinding process, the debris and splashing lubricant generated will cause the environment near the infrared thickness measurement to be relatively harsh, thus affecting the actual effect of thickness measurement. Summary of the Invention

[0004] In view of the problems of the prior art, the present invention provides a fully automatic four-axis thickness measuring grinding machine, which realizes thickness measurement by mechanical contact and reduces the influence of the environment on thickness measurement.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The fully automatic thickness measuring four-axis grinding machine provided by the present invention includes a machine body, a controller arranged on the machine body, and a transmission mechanism. Along the transmission direction of the transmission 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 to sense the thickness of three positions of the steel plate. The first lower grinding mechanism, the first upper grinding mechanism, the second lower grinding mechanism, and the second upper grinding mechanism are respectively used to grind two surfaces of the steel plate. 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 a height adjustment mechanism.

[0007] The three-point thickness measuring mechanism includes a thickness measuring frame and three thickness measuring modules spaced apart on the thickness measuring frame. The thickness measuring module includes a contact roller, a thickness measuring sensor, and a telescopic mechanism. The contact roller can be raised and lowered on the thickness measuring frame via the telescopic mechanism. The thickness measuring sensor is installed on the thickness measuring frame. The thickness measuring sensor is used to sense the raising and lowering amplitude of the contact roller.

[0008] The following steps are also included:

[0009] The transmission mechanism transmits the steel plate;

[0010] The three contact rollers respectively contact the three positions on the top of the steel plate, forcing the contact rollers to rise through the steel plate to trigger the thickness sensor;

[0011] The thickness sensor sends a signal to the controller, which calculates the thickness information of the steel plate at three locations;

[0012] According to the thickness information of the three positions of the steel plate, the heights of the first lower grinding mechanism, the first upper grinding mechanism, the second lower grinding mechanism and the second upper grinding mechanism are adjusted accordingly.

[0013] Furthermore, a triggering member is provided on the top of the movable frame, and the thickness measuring sensor has a probe, which protrudes from the bottom of the thickness measuring frame, and is arranged opposite to the triggering member; the thickness measuring module also includes a lifting seat and a limit pin, the lifting seat is provided with a lifting slot, the thickness measuring frame is provided with a lifting hole, the limit pin passes through the lifting slot and is installed in the lifting hole, and the thickness measuring sensor is installed on the lifting seat; the thickness measuring sensor is used to contact with the triggering member and is driven to rise by the triggering member; the thickness measuring module also includes a lifting seat and a limit pin, the lifting seat is provided with a lifting slot, the thickness measuring frame is provided with a lifting hole, the limit pin passes through the lifting slot and is installed in the lifting hole, and the thickness measuring sensor is installed on the lifting seat;

[0014] The thickness sensor is used to contact the trigger member and is driven to rise by the trigger member.

[0015] Furthermore, the thickness measuring sensor is driven to rise by a trigger, specifically including:

[0016] The probe of the thickness sensor is lifted up to its maximum stroke by the triggering member;

[0017] The probe is continuously lifted up, and the probe drives the thickness sensor to rise;

[0018] Obtain the lifting height of the thickness sensor, and then calculate the sum h of the maximum stroke of the probe and the lifting height of the thickness sensor;

[0019] Send h to the controller.

[0020] Furthermore, the controller calculates the thickness information of the steel plate at three locations, specifically including:

[0021] S1. The contact roller changes its contact position with the steel plate as the steel plate moves;

[0022] S2. The height of the contact roller changes as the contact position with the steel plate changes;

[0023] S3. The controller records the height change of the contact roller and selects the maximum value h of the height of the contact roller. max With the minimum value h min ;

[0024] S4. Calculate the maximum value h max With the minimum value h minThe difference h' is determined to determine whether h' is within the preset range; if so, the value h' is taken; otherwise, the maximum value h max , minimum value h min , the position where the maximum value is measured and the position where the minimum value is measured are all recorded;

[0025] When the height change of the contact roller is less than △h, only the minimum value h is recorded. min ;

[0026] The value of the time t is a constant between 0.05-0.3s.

[0027] Furthermore, the heights of the first lower grinding mechanism, the first upper grinding mechanism, the second lower grinding mechanism, and the second upper grinding mechanism are adjusted accordingly according to the thickness information of the three positions of the steel plate, specifically including:

[0028] A. Combine the thickness information of the three locations of the steel plate and select the total maximum and minimum values of all thickness values;

[0029] B. Calculate the difference between the total maximum and the total minimum, and record it as the total difference;

[0030] C. adjusting the distance between the first lower grinding mechanism and the transmission mechanism to the sum of the total minimum value and the total difference;

[0031] D. Adjust the distance between the second upper grinding mechanism and the transmission mechanism to the total minimum value;

[0032] E. Calculate the difference between the pre-stored thickness and the total minimum value and record it as the target difference;

[0033] F. Adjust the distance between the second lower grinding mechanism and the transmission mechanism to the sum of the difference between the preset thickness and the target thickness;

[0034] G. Adjust the distance between the second upper grinding mechanism and the transmission mechanism to the preset thickness.

[0035] Furthermore, 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 adjustment mechanism includes a driving motor, a reducer, a transmission shaft and two lifting reducers. The driving motor is connected to a lifting reducer through a reducer drive, and the transmission shaft is connected between the two lifting reducers. Each lifting reducer is driven and connected to a height adjustment seat. The height adjustment seat is provided with a bearing seat. The two ends of the grinding roller are respectively rotatably arranged on the bearing seats of the two height adjustment modules, and the linear drive component is connected to the three-point thickness measuring mechanism signal.

[0036] Furthermore, the driving module includes a rotating motor, a rotating belt, a swinging motor and an eccentric transmission structure. The height adjustment seat is provided with a guide rail, and the bearing seat is slidably set on the guide rail; the rotating motor is driven by the rotating belt to connect one end of the grinding roller, and the swinging motor is driven by the eccentric transmission structure to connect the bearing seat connected to the other end of the grinding roller.

[0037] Furthermore, the driving module also includes a support base, the rotating motor is installed on the support base, the support base is provided with multiple support shafts, and the support shafts pass through the support base; the part of the support shaft located above the support base and the part below the support base are respectively provided with a first spring, and at least one second spring is provided at the bottom of the support base.

[0038] Furthermore, pressure sensors are provided at both ends of the grinding roller, and a clutch is provided between the transmission shaft and another lifting reducer;

[0039] The pressure sensor is used to sense the pressure at both ends of the grinding roller. When the pressure difference between the two ends exceeds a preset threshold, the following steps are executed:

[0040] Y1 determines the pressure at both ends of the grinding roller. If the pressure near the drive motor is large, proceed to step Y2; otherwise, proceed to step Y3.

[0041] Y2. The clutch switches to a state where the transmission shaft and the other lifting reducer are no longer in transmission. The drive motor then drives the lifting reducer through the reducer to lift the grinding roller closer to the end of the drive motor.

[0042] Y3. The drive motor drives both lifting reducers simultaneously via the reducer to raise the grinding roller. The clutch then switches to discontinue transmission between the drive shaft and the other lifting reducer. The drive motor then drives one lifting reducer downward via the reducer.

[0043] The lifting height and the descending height are set according to the absolute value of the pressure difference at both ends.

[0044] Furthermore, after grinding a steel plate, the clutch switches state and the drive motor is activated so that the heights of both ends of the grinding roller are adjusted to be basically the same, and then the height of the grinding roller is adjusted according to the thickness value of the next steel plate.

[0045] Beneficial effects of the present invention: The present invention sets a three-point thickness measuring mechanism, utilizes the contact roller to directly contact three different positions of the steel plate, and can obtain the thickness of the steel plate by the amplitude of the contact roller rising and falling, thereby effectively avoiding the influence of the environment on the thickness measurement and ensuring the accuracy of the thickness measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Schematic diagram of the present invention.

[0047] Figure 2 Schematic diagram of the three-point thickness measurement mechanism of the present invention.

[0048] Figure 3 for Figure 2 Schematic diagram from another perspective.

[0049] Figure 4 for Figure 3 Enlarged view of point A.

[0050] Figure 5 Schematic diagram of the thickness measurement module of the present invention.

[0051] Figure 6 It is a schematic diagram of the cooperation between the first lower grinding mechanism and the height adjustment mechanism of the present invention.

[0052] Figure 7 Schematic diagram of the support base of the present invention.

[0053] Figure 8 It is a schematic diagram of the liquid spraying mechanism of the present invention.

[0054] Figure 9 Schematic diagram of the limiting shaft of the present invention.

[0055] Figure 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—liquid spraying mechanism, 11—limiting shaft, 12—quick release structure, 31—thickness measuring frame, 32—thickness measuring module, 33—contact roller, 34—thickness measuring sensor, 35—telescopic mechanism, 36—lifting seat, 37—limiting pin, 41—grinding roller, 42—driving module, 81—driving motor, 82—reducer, 83—transmission shaft, 84—lifting reducer, 85—height adjustment seat , 86—bearing seat, 87—guide rail, 88—clutch, 91—infusion tube, 92—spray tube, 93—spray head, 94—recovery tube, 341—probe, 351—rotating frame, 352—elastic member, 353—limiting member, 354—limiting sleeve, 355—trigger member, 356—anti-separation cap, 361—lifting groove, 362—limiting part, 363—limiting column, 421—rotating motor, 422—rotating belt, 423—swinging motor, 424—eccentric transmission structure, 425—support seat, 426—support shaft, 427—first spring, 428—second spring. DETAILED DESCRIPTION

[0056] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings. The contents mentioned in the embodiments are not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0057] like Figures 1 to 9 As shown, the fully automatic thickness measuring four-axis grinding machine provided by the present invention includes a body 1, a controller (not shown in the figure) and a transmission mechanism 2 all arranged on the body 1. Along the transmission direction of the transmission mechanism 2, the 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 three positions 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 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.

[0058] During operation, the steel plate is transported into the machine body 1 through the transmission mechanism 2. The thickness of the steel plate is first detected 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 respectively adjusted by the corresponding height adjustment mechanism 8 to ensure that the steel plate can pass through and be ground smoothly, ensuring the grinding safety and grinding quality; the ground steel plate is transported to the outside world for the next step.

[0059] In this embodiment, the three-point thickness measuring mechanism 3 includes a thickness measuring frame 31 and three thickness measuring modules 32 spaced apart on the thickness measuring frame 31. The thickness measuring module 32 includes a contact roller 33, a thickness measuring sensor 34, and a telescopic mechanism 35. The contact roller 33 can be raised and lowered on the thickness measuring frame 31 via the telescopic mechanism 35. The thickness measuring sensor 34 is installed on the thickness measuring frame 31. The thickness measuring sensor 34 is used to sense the raising and lowering amplitude of the contact roller 33.

[0060] The action of the present invention comprises the following steps:

[0061] The transmission mechanism transmits the steel plate;

[0062] The three contact rollers 33 respectively contact the three positions on the top of the steel plate, forcing the contact rollers 33 to rise through the steel plate to trigger the thickness sensor 34;

[0063] The thickness sensor 34 sends a signal to the controller, which calculates the thickness information of the steel plate at three locations;

[0064] According to the thickness information of the three positions of the steel plate, the heights of 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 accordingly.

[0065] 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 contact rollers 33 of the three thickness measuring modules 32 will contact three positions of the steel plate respectively, and the contact position will continue to change as the steel plate is transmitted. The contact roller 33 rises due to the impact of the steel plate, and the thickness measuring sensor 34 measures the amplitude of the rise of the contact roller 33. The thickness of the steel plate can be calculated based on the preset value, thereby measuring and uploading the thickness changes of the three positions of the steel plate in the transmission direction, ensuring that a more accurate thickness detail of the steel plate can be reliably obtained. In addition, since the present invention adopts mechanical contact to achieve thickness measurement of the steel plate, the measurement accuracy will not be affected by particulate matter in the air.

[0066] During the above process, when the contact roller 33 contacts the steel plate, the contact roller 33 will be lifted and raised. However, due to factors such as inertia and gravity, the contact roller 33 is in an unstable state. Therefore, the present invention will not obtain the signal change of the thickness measuring sensor 34 until t time has passed to ensure that the contact roller 33 is stable, after the height of the contact roller 33 changes to a level that can trigger the thickness measuring sensor 34, to ensure that the measured information is accurate.

[0067] Preferably, the time t can be set based on actual component parameters, typically between 0.05 and 0.3 seconds. When the contact rollers 33 come into contact with the steel plate, the steel plate stops for the aforementioned time t to allow the contact rollers 33 to enter a steady state before continuing to move. This ensures that the contact rollers 33 can measure the positions of the steel plate at different locations along the extension direction. Thus, the three contact rollers 33 work together to accurately measure the thickness of the entire steel plate.

[0068] In this embodiment, the telescopic mechanism 35 includes a rotating frame 351, an elastic member 352, a limiting member 353 and a limiting sleeve 354. The limiting sleeve 354 is installed on the thickness measuring frame 31. The limiting member 353 is movably set on the thickness measuring frame 31 and is located in the limiting sleeve 354. The limiting sleeve 354 is used to prevent the limiting member 353 from separating from the rotating frame 351. The bottom of the limiting member 353 passes through the bottom of the thickness measuring frame 31 and is connected to the rotating frame 351. The elastic member 352 is set between the rotating frame 351 and the thickness measuring frame 31. The contact roller 33 is rotatably set on the rotating frame 351. The thickness measuring sensor 34 is used to sense the lifting and lowering amplitude of the rotating frame 351.

[0069] Specifically, the contact roller 33 is rotatably mounted on a rotating frame 351, allowing it to rotate as the steel plate is transported. This reduces friction between the contact roller 33 and the steel plate, thus reducing wear. During this process, the elastic member 352 maintains the contact roller 33's stability through its spring force, preventing it from vibrating excessively and potentially affecting measurement results.

[0070] A cap 356 is installed on the top of the stopper 353. The cap 356 is wider than the inner diameter of the stopper sleeve 354 and prevents the stopper 353 from separating from the stopper sleeve 354. Because the rotating frame 351 and the contact roller 33 rise and fall synchronously, the thickness sensor 34 actually measures the height of the rotating frame 351, which provides more stable measurement results than measuring the height of the rotating contact roller 33.

[0071] 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 .

[0072] Specifically, the elastic member 352 comprises a spring and is mounted on one end of the stopper 353 that protrudes from the bottom of the thickness measuring frame 31. The two ends of the elastic member 352 are respectively connected to / contact the thickness measuring frame 31 and the rotating frame 351. That is, the elastic member 352 is directly mounted on the stopper 353, which can better achieve the effects of cushioning and retaining.

[0073] Specifically, a trigger member 355 is provided on the top of the rotating frame 351 , and the thickness measuring sensor 34 has a probe 341 . The probe 341 protrudes out of the bottom of the thickness measuring frame 31 , and the probe 341 is arranged opposite to the trigger member 355 .

[0074] The thickness sensor 34 is driven to rise by the trigger, specifically including:

[0075] The probe 341 of the thickness measuring sensor 34 is lifted to its maximum stroke by the triggering member 355 ;

[0076] The probe 341 is continuously lifted, and the probe 341 drives the thickness sensor 34 to rise;

[0077] Obtaining the lifting height of the thickness measuring sensor 34 , and then calculating the sum h of the maximum stroke of the probe 341 and the lifting height of the thickness measuring sensor 34 ;

[0078] Send h to the controller.

[0079] In actual use, the elastic member 352 is connected to a pressure sensor (not shown in the figure); when the thickness sensor 34 is lifted, the height to which the thickness sensor is lifted is obtained by the change in the pressure value of the pressure sensor.

[0080] The pressure sensor is preferably positioned between the elastic member 352 and the thickness gauge frame 31. Specifically, when the entire thickness gauge sensor 34 is lifted, it compresses the elastic member 352, causing it to deform. The degree of deformation of the elastic member 352 is positively correlated with the pressure applied to the pressure sensor. Therefore, when the pressure applied to the pressure sensor exceeds a certain value, it indicates that the probe 341 has reached its maximum travel. If the pressure applied to the pressure sensor continues to rise, the thickness gauge sensor 34 is lifted. Since the height to which the thickness gauge sensor 34 is lifted is typically small, and once the elastic member 352 is compressed to a certain degree, the pressure value changes significantly as the compression continues, the subsequent pressure change in the pressure sensor can provide high-precision feedback on the height to which the thickness gauge sensor 34 is lifted, thereby ensuring accurate feedback of the steel plate thickness.

[0081] When the pressure value measured by the pressure sensor exceeds a preset threshold, an alarm signal is transmitted to the outside world. Specifically, when the pressure measured by the pressure sensor is excessively high, it indicates that the thickness of the steel plate itself does not meet the required requirements. In this case, an alarm is required to inform the staff of this situation and determine whether the steel plate needs to be removed to ensure the safety of the subsequent grinding mechanism. The alarm method adopted by the present invention is to transmit the alarm signal to the outside world, which then alerts the staff through a buzzer or other means via the external master control.

[0082] The thickness sensor 34 is preferably a contact sensor, which infers the thickness of the steel plate by the height at which the probe 341 is forced to rise upon contact. The trigger member 355 is preferably rotatably connected to the rotating frame 351. The trigger member 355 can be replaced with the appropriate height according to the actual steel plate to be measured, thereby enhancing the flexibility of the present invention.

[0083] In this embodiment, the controller calculates the thickness information of the steel plate at three locations, specifically including:

[0084] S1. The contact roller 33 continuously changes the position of contact with the steel plate as the steel plate moves;

[0085] S2. The height of the contact roller 33 changes as the position of the contact roller 33 with the steel plate changes;

[0086] S3. The controller records the height change of the contact roller 33 and selects the maximum value h of the height of the contact roller 33. max With the minimum value h min ;

[0087] S4. Calculate the maximum value h max With the minimum value h min The difference h' is determined to determine whether h' is within the preset range; if so, the value h' is taken; otherwise, the maximum value h max , minimum value hmin , the position where the maximum value is measured and the position where the minimum value is measured are all recorded;

[0088] When the height change value of the contact roller 33 is less than △h, only the minimum value h is recorded. min ;

[0089] The value of the time t is a constant between 0.05-0.3s.

[0090] That is, due to process defects, it is impossible for the thickness of the steel plate to be different at every location. Based on this problem, the present invention requires three different locations of the steel plate to measure the thickness of the steel plate along the transmission direction of the steel plate. Therefore, for a contact roller 33, the thickness value measured by it for the steel plate must have a maximum value h. max With the minimum value h min , and the two have an impact on the height change of the grinding mechanism: if the difference between the two is large, the grinding mechanism must be based on the maximum value h max With the minimum value h min To adjust the height, it is necessary to send the measured positions of the two to the grinding mechanism. Combined with the thickness change of the steel plate is usually linear rather than sudden, the grinding mechanism can be based on this principle and combined with the maximum value h max With the minimum value h min The height is adjusted during the grinding process to ensure that the grinding mechanism does not squeeze excessively with the steel plate and cause severe wear.

[0091] Specifically, in step S3, when the height change value of the contact roller 33 is less than Δh, only the minimum value h is sent. min That is, when the overall thickness of the steel plate does not change much, the height of the grinding mechanism can be adjusted according to the minimum thickness of the steel plate, so that the grinding mechanism can keep the height of each position basically consistent after grinding the steel plate.

[0092] Since the present invention has three thickness measuring modules 2, the height change of the grinding mechanism is adjusted according to the signals sent by the three thickness measuring modules 2. Taking the above example, if the thickness of the steel plate measured by one of the contact rollers 3 does not change much, and the maximum thickness h of the steel plate measured by at least one of the other two contact rollers 3 is max With the minimum value h min If the difference is greater than △h, the grinding mechanism needs to be adjusted in height according to the thickness change of the steel plate during the grinding process. When the thickness sensor of one of the thickness measuring modules 32 is lifted to the point where the pressure sensor exceeds the threshold, an alarm signal is directly sent.

[0093] In this way, the reliability of steel plate thickness measurement is guaranteed, and the grinding mechanism can maintain the optimal height to grind the steel plate.

[0094] In this embodiment, the thickness measurement module 32 further includes a lifting seat 36 and a limiting pin 37. The lifting seat 36 has a lifting slot 361, and the thickness measurement frame 31 has a lifting hole. The limiting pin 37 passes through the lifting slot 361 and is installed in the lifting hole. The thickness measurement sensor 34 is installed on the lifting seat 36.

[0095] The thickness measuring sensor 34 is used to contact the probe 341 and be driven to rise by the probe 341 .

[0096] That is, the thickness sensor 34 has a floating structure. When the steel plate is within a certain thickness range, the lifting and lowering of the probe 341 will not affect the height change of the thickness sensor 34. However, when the thickness of a certain steel plate is too great and exceeds the travel of the probe 341, the entire lifting base 36 will be lifted up together. At this time, the lifting of the lifting base 36 can effectively prevent damage to the thickness sensor 34, achieving the effect of floating protection of the thickness sensor 34.

[0097] Specifically, the lifting base 36 has a limiting portion 362, with a limiting post 363 disposed at the bottom of the limiting portion 362. The limiting post 363 is used to interfere with the thickness measuring frame 31 to prevent the lifting base 36 from descending too far. Specifically, the limiting portion 362 is shaped like a "7," with the limiting post 363 disposed below the top of the "7," limiting the extent of the lifting base 36's descent. The limiting post 363 is preferably secured to the limiting portion 362 via screws or threaded connections, facilitating adjustment and replacement of the limiting post 363.

[0098] Specifically, the bottom of the limiting member 353 is screwed to the rotating frame 351 , and a suitable limiting member 353 can be replaced for use as needed.

[0099] The heights of 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 accordingly according to the thickness information of the three positions of the steel plate, specifically including:

[0100] A. Combine the thickness information of the three locations of the steel plate and select the total maximum and minimum values of all thickness values;

[0101] B. Calculate the difference between the total maximum and the total minimum, and record it as the total difference;

[0102] C. Adjust the distance between the first lower grinding mechanism 4 and the transmission mechanism 2 to the sum of half of the total difference and the total minimum value;

[0103] D. Adjust the distance between the second upper grinding mechanism 5 and the transmission mechanism 2 to the total minimum value;

[0104] E. Calculate the difference between the pre-stored thickness and the total minimum value and record it as the target difference;

[0105] F. Adjust the distance between the second lower grinding mechanism 6 and the transmission mechanism 2 to the sum of the difference between the preset thickness and the target thickness;

[0106] G. Adjust the distance between the second upper grinding mechanism 7 and the transmission mechanism 2 to the preset thickness.

[0107] For example, if the total maximum value is 11 cm, the minimum value is 10 cm, the total difference is 1 cm, and the preset thickness is 9 cm, then the target difference is 1 cm. The distance between the first lower grinding mechanism 4 and the conveyor mechanism 2 is adjusted to 10.5 cm, the distance between the first upper grinding mechanism 5 and the conveyor mechanism is adjusted to 10 cm, the distance between the second lower grinding mechanism 6 and the conveyor mechanism 2 is adjusted to 9.5 cm, and the distance between the second upper grinding mechanism 7 and the conveyor mechanism 2 is adjusted to 9 cm. In this way, through a gradual reduction process, the steel plate is gradually ground from its initial thickness to the preset thickness, ensuring that the thickness reduction caused by each grinding operation is minimal, thereby ensuring grinding quality.

[0108] In this 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 adjustment mechanism 8 includes a driving motor 81, a reducer 82, a transmission shaft 83 and two lifting reducers 84. The driving motor 81 is driven by the reducer 82 to connect to a lifting reducer 84. The transmission shaft 83 is connected between the two lifting reducers 84. Each lifting reducer 84 is driven and connected to a height adjustment seat 85. The height adjustment seat 85 is provided with a bearing seat 86. The two ends of the grinding roller 41 are respectively rotatably set on the bearing seats 86 of the two height adjustment modules. The linear drive component is connected to the three-point thickness measuring mechanism 3 by signal.

[0109] The height adjustment mechanism 8 is driven by a driving motor 81, which drives two lifting reducers 84 to perform the same action via a reducer 82, so that the lifting amplitudes of the two ends of the grinding roller 41 are basically consistent, ensuring stability.

[0110] Specifically, the driving module 42 includes a rotating motor 421, a rotating belt 422, a swinging motor 423 and an eccentric transmission structure 424. The height adjustment seat 85 is provided with a guide rail 87, and the bearing seat 86 is slidably set on the guide rail 87; the rotating motor 421 drives one end of the grinding roller 41 through the rotating belt 422, and the swinging motor 423 drives the bearing seat 86 connected to the other end of the grinding roller 41 through the eccentric transmission structure 424.

[0111] During actual use, the swing motor 423 is mounted on the bearing seat 86 .

[0112] That is, during grinding, the grinding roller 41 is rotated by the rotating motor 421 driving the rotating belt 422, thereby achieving a grinding effect on the steel plate. To achieve a better grinding effect, the present invention also provides a swing motor 423 and an eccentric transmission structure 424. The swing motor 423 drives the eccentric transmission mechanism to move the two bearing seats 86 back and forth along the length of the guide rail 87. In other words, in addition to rotating, the grinding roller 41 also moves in a direction perpendicular to the direction of transmission of the steel plate. This allows the grinding roller 41 to move relative to the steel plate in more than one direction, which is beneficial to improving the grinding effect.

[0113] The grinding roller 41 can achieve the desired effect by moving back and forth in a direction that is usually less than 1 cm.

[0114] Specifically, the driving module 42 also includes a support base 425, the rotating motor 421 is installed on the support base 425, and the support base 425 is provided with multiple support shafts 426, which pass through the support base 425; the part of the support shaft 426 located above the support base 425 and the part below the support base 425 are respectively provided with a first spring 427, and at least one second spring 428 is provided at the bottom of the support base 425.

[0115] That is, when the bearing seat 86 is raised or lowered, the tension of the rotating belt 422 will inevitably change. Compared with the prior art method of using a tensioning wheel for control, the present invention adopts a support seat 425, that is, the first spring 427 and the second spring 428 of the support seat 425 cooperate to realize the tension control of the rotating belt 422: taking the height adjustment mechanism 8 driving the grinding roller 41 to rise as an example, when the grinding roller 41 rises, the rotating belt 422 will inevitably be pulled by the grinding roller 41, which is equivalent to the grinding roller 41 "pulling" the rotating motor 421 to rise through the rotating belt 422. At this time, the first spring 427 and the second spring 428 recover their deformation to a certain extent due to the reduction in pressure from the rotating motor 421, thereby cooperating with the rotating belt 422 to lift the rotating motor 421 to a certain height, thereby achieving the effect of keeping the tension of the rotating belt 422 from changing too much.

[0116] Pressure sensors (not shown) are provided at both ends of the grinding roller 41, and a clutch 88 is provided between the transmission shaft 83 and another lifting reducer 84;

[0117] The pressure sensor is used to sense the pressure at both ends of the grinding roller. When the pressure difference between the two ends exceeds a preset threshold, the following steps are executed:

[0118] Y1 determines the pressure at both ends of the grinding roller, such as the pressure near the drive motor 81 end is large, execute step Y2, otherwise execute step Y3;

[0119] Y2. The clutch switches to a state where the transmission shaft 83 and another lifting reducer 84 are no longer transmitted, and then the drive motor 81 drives a lifting reducer 84 through the reducer 82 so that the grinding roller 41 is lifted near one end of the drive motor 81;

[0120] Y3. The drive motor 81 drives the two lifting reducers 84 simultaneously via the reducer 82 to raise the grinding roller 41. The clutch 88 then switches state so that the transmission shaft 83 and the other lifting reducer 84 are no longer transmitting. The drive motor 81 then drives one lifting reducer 84 downward via the reducer 82.

[0121] The lifting height and the descending height are set according to the absolute value of the pressure difference at both ends.

[0122] In actual operation, the following phenomena may occur: the thickness difference at different positions of the steel plate is too large, or the degree of wear at both ends of the grinding roller 41 is very different after use. In either case, it will affect the grinding of the steel plate. Therefore, when the grinding effect is very different (via the pressure value feedback at both ends of the grinding roller), the present invention uses the drive motor 81 and the clutch 88 to achieve different heights of the two height adjustment seats 85, so that there is a height difference at both ends of the grinding roller, thereby using height compensation to make the pressure difference at both ends of the grinding roller within a preset range, thereby ensuring the quality and effect of the grinding.

[0123] Of course, the height difference between the two height adjustment seats 85 is positively correlated with the pressure difference at both ends of the grinding roller 41. The specific proportional relationship is related to factors such as the grinding roller performance and the thickness of the steel plate. It can be calculated according to actual conditions and will not be elaborated here.

[0124] Specifically, after grinding a steel plate, the clutch switches state and the drive motor operates to adjust the height of the grinding rollers to be roughly the same. Then, the height of the grinding rollers is adjusted according to the thickness of the next steel plate, thereby ensuring smooth grinding of the next steel plate.

[0125] 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 includes a liquid infusion pipe 91 and n liquid spraying pipes 92. The n liquid spraying pipes 92 are all connected to the liquid infusion pipe 91. The liquid infusion pipe 91 is used to connect to an external liquid source. The output end of the liquid spraying pipe 92 extends into the machine body 1. The output end of the liquid spraying pipe 92 is installed with a spray head 93, which is directly facing the grinding shaft.

[0126] n is an integer not less than 4.

[0127] As in this embodiment, n=8, that is, every two spray pipes 92 correspond to one grinding mechanism, and lubricating liquid is sprayed on the grinding roller 41 of the grinding mechanism through the spray head 93 of the spray pipe 92, so that the friction force at the contact position between the steel plate and the grinding roller 41 is reduced, thereby preventing the grinding roller 41 from wearing too quickly.

[0128] Specifically, the liquid spraying mechanism 9 also includes a recovery pipe 94. The bottom of the body 1 is tilted from the side to the middle. A collecting port is provided in the middle of the bottom of the body 1. The recovery pipe 94 is connected to the collecting port. The recovery pipe 94 is used to transmit the recovered lubricating liquid to an external liquid source.

[0129] The funnel-like structure at the bottom of the body 1 is used to guide the lubricating liquid that falls on the bottom of the body 1 to the collection port and recover the lubricating liquid through the recovery pipe 94, thereby avoiding the lubricating liquid from being retained in the body 1 and realizing the recycling of the lubricating liquid.

[0130] In this embodiment, a plurality of limiting shafts 11 are provided in the body 1 . Quick-release structures 12 are provided at both ends of the limiting shafts 11 . The limiting shafts 11 are connected to the body 1 via the quick-release structures 12 .

[0131] The limiting shaft 11 is used to cooperate with the grinding roller 41 to "clamp" the steel plate to ensure reliable grinding of the steel plate, and the assembly of the limiting shaft 11 is achieved through the quick-release structure 12. The quick-release structure 12 can be a conventional structure or an attached structure. Figure 9 The disclosed structure means that the staff only needs to pull and rotate the quick-release structure 12 to achieve the assembly, fixation / disassembly of the limit shaft 11, thereby facilitating the replacement of the limit shaft 11 and improving efficiency.

[0132] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are all within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A fully automatic four-axis thickness measuring grinding machine, comprising a machine body, a controller provided on the machine body, and a transmission mechanism, characterized in that: Along the transmission direction of the transmission 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 to sense the thickness of three positions of the steel plate. The first lower grinding mechanism, the first upper grinding mechanism, the second lower grinding mechanism and the second upper grinding mechanism are respectively used to grind two surfaces of the steel plate. 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 a height adjustment mechanism. The three-point thickness measuring mechanism includes a thickness measuring frame and three thickness measuring modules spaced apart on the thickness measuring frame. The thickness measuring module includes a contact roller, a thickness measuring sensor, and a telescopic mechanism. The contact roller can be raised and lowered on the thickness measuring frame via the telescopic mechanism. The thickness measuring sensor is installed on the thickness measuring frame. The thickness measuring sensor is used to sense the raising and lowering amplitude of the contact roller. The following steps are also included: The transmission mechanism transmits the steel plate; The three contact rollers respectively contact the three positions on the top of the steel plate, forcing the contact rollers to rise through the steel plate to trigger the thickness sensor; The thickness sensor sends a signal to the controller, which calculates the thickness information of the steel plate at three locations; According to the thickness information of the three positions of the steel plate, the heights of the first lower grinding mechanism, the first upper grinding mechanism, the second lower grinding mechanism and the second upper grinding mechanism are adjusted accordingly; The first lower grinding mechanism, the first upper grinding mechanism, the second lower grinding mechanism and the second upper grinding mechanism each have a grinding roller, pressure sensors are provided at both ends of the grinding roller, and a clutch is provided between the transmission shaft and another lifting reducer; The pressure sensor is used to sense the pressure at both ends of the grinding roller. When the pressure difference between the two ends exceeds a preset threshold, the following steps are executed: Y1 determines the pressure at both ends of the grinding roller. If the pressure near the drive motor is large, proceed to step Y2; otherwise, proceed to step Y3. Y2. The clutch switches to a state where the transmission shaft and the other lifting reducer are no longer in transmission. The drive motor then drives the lifting reducer through the reducer to lift the grinding roller closer to the end of the drive motor. Y3. The drive motor drives both lifting reducers simultaneously via the reducer to raise the grinding roller. The clutch then switches to discontinue transmission between the drive shaft and the other lifting reducer. The drive motor then drives one lifting reducer downward via the reducer. The lifting height and the descending height are set according to the absolute value of the pressure difference at both ends.

2. The fully automatic thickness measuring four-axis grinding machine according to claim 1, characterized in that: A triggering member is provided on the top of the movable frame, and the thickness measuring sensor has a probe, which protrudes from the bottom of the thickness measuring frame, and is arranged opposite to the triggering member; the thickness measuring module also includes a lifting seat and a limit pin, the lifting seat is provided with a lifting slot, the thickness measuring frame is provided with a lifting hole, the limit pin passes through the lifting slot and is installed in the lifting hole, and the thickness measuring sensor is installed on the lifting seat; the thickness measuring sensor is used to contact with the triggering member and is driven to rise by the triggering member; the thickness measuring module also includes a lifting seat and a limit pin, the lifting seat is provided with a lifting slot, the thickness measuring frame is provided with a lifting hole, the limit pin passes through the lifting slot and is installed in the lifting hole, and the thickness measuring sensor is installed on the lifting seat; The thickness sensor is used to contact the trigger member and is driven to rise by the trigger member.

3. The fully automatic thickness measuring four-axis grinding machine according to claim 2, characterized in that: The thickness sensor is driven to rise by the trigger, specifically including: The probe of the thickness sensor is lifted up to its maximum stroke by the triggering member; The probe is continuously lifted up, and the probe drives the thickness sensor to rise; Obtain the lifting height of the thickness sensor, and then calculate the sum h of the maximum stroke of the probe and the lifting height of the thickness sensor; Send h to the controller.

4. The fully automatic thickness measuring four-axis grinding machine according to claim 3, characterized in that: The controller calculates the thickness information of the steel plate at three locations, specifically including: S1. The contact roller changes its contact position with the steel plate as the steel plate moves; S2. The height of the contact roller changes as the contact position with the steel plate changes; S3. The controller records the height change of the contact roller and selects the maximum value hmax and the minimum value hmin of the height of the contact roller; S4 calculates the difference h' between the maximum value hmax and the minimum value hmin, and determines whether h' is within the preset range; if so, the value h' is taken; otherwise, the maximum value hmax, the minimum value hmin, the position of the measured maximum value, and the position of the measured minimum value are recorded; When the height change of the contact roller is less than △h, only the minimum value hmin is recorded.

5. The fully automatic thickness measuring four-axis grinding machine according to any one of claim 4, characterized in that: The step of adjusting the heights of the first lower grinding mechanism, the first upper grinding mechanism, the second lower grinding mechanism, and the second upper grinding mechanism according to the thickness information of the three positions of the steel plate specifically includes: A. Combine the thickness information of the three locations of the steel plate and select the total maximum and minimum values of all thickness values; B. Calculate the difference between the total maximum and the total minimum, and record it as the total difference; C. Adjust the distance between the first lower grinding mechanism and the transmission mechanism to the sum of half of the total difference and the total minimum value; D. Adjust the distance between the second upper grinding mechanism and the transmission mechanism to the total minimum value; E. Calculate the difference between the pre-stored thickness and the total minimum value and record it as the target difference; F. Adjust the distance between the second lower grinding mechanism and the transmission mechanism to the sum of the difference between the preset thickness and the target thickness; G. Adjust the distance between the second upper grinding mechanism and the transmission mechanism to the preset thickness.

6. The fully automatic thickness measuring four-axis grinding 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 driving module for driving the grinding roller to rotate, and the height adjustment mechanism includes a driving motor, a reducer, a transmission shaft and two lifting reducers. The driving motor is connected to a lifting reducer through a reducer, and the transmission shaft is connected between the two lifting reducers. Each lifting reducer is driven and connected to a height adjustment seat, and the height adjustment seat is provided with a bearing seat. The two ends of the grinding roller are respectively rotatably arranged on the bearing seats of the two height adjustment modules, and the linear drive component is connected to the three-point thickness measuring mechanism signal.

7. The fully automatic thickness measuring four-axis grinding machine according to claim 6, characterized in that: The driving module includes a rotating motor, a rotating belt, a swinging motor and an eccentric transmission structure. The height adjustment seat is provided with a guide rail, and the bearing seat is slidably set on the guide rail; the rotating motor is driven by the rotating belt to connect one end of the grinding roller, and the swinging motor is driven by the eccentric transmission structure to connect the bearing seat connected to the other end of the grinding roller.

8. The fully automatic thickness measuring four-axis grinding machine according to claim 7, characterized in that: The driving module also includes a support base, the rotating motor is installed on the support base, and the support base is provided with multiple support shafts, which pass through the support base; the part of the support shaft located above the support base and the part below the support base are respectively provided with a first spring, and at least one second spring is provided at the bottom of the support base.

9. The fully automatic thickness measuring four-axis grinding machine according to any one of claim 1, characterized in that: After grinding a steel plate, the clutch switches state and the drive motor is activated to adjust the heights of both ends of the grinding roller to be basically consistent, and then the height of the grinding roller is adjusted according to the thickness value of the next steel plate.

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