Automatic grinding and polishing equipment for wrench and machining method

Abstract

The automatic grinding and polishing equipment comprises a wrench feeding unit and a grinding unit, the wrench feeding unit comprises a rotating disc conducting rotating motion and a fixed back plate arranged close to the back face of the rotating disc, and a plurality of limiting grooves are formed in the rotating disc; a feeding station, a discharging station and a polishing station are arranged around the rotating disc, and a first avoiding notch is formed in the position, corresponding to the polishing station, of the fixed back plate. The polishing unit is arranged at the wrench polishing station and comprises a first polishing module and a second polishing module; the first polishing module and the second polishing module each comprise a second driving part, a supporting plate driven by the second driving part to move front and back, a third driving part fixed to the supporting plate and a polishing wheel driven by the third driving part to rotate, and the shaft end face of the polishing wheel is a polishing working face. Wrench feeding, double-face grinding and wrench discharging can be achieved at the same time, and the wrench grinding and polishing efficiency is greatly improved.

Description

[Technical field]

[0001] The invention belongs to the technical field of wrench grinding equipment, and in particular relates to automatic wrench grinding and polishing equipment and a processing method. [Background technology]

[0002] After the wrench is produced, in order to improve the service life and overall aesthetics, the surface of the wrench needs to be polished to remove the edges and protrusions on the surface of the wrench, so as to facilitate the subsequent spraying of the anti-rust layer and the decorative layer. Patent CN220637366U in the prior art discloses a wrench flat grinding device, in which the wrench is placed on a positioning fixture and transported to the flat grinding mechanism along a conveyor line, and the wrench is single-sidedly polished by an abrasive belt. The device can only polish a single side of the wrench at a time, and the polishing efficiency is low.

[0003] Patent CN118699972A in the prior art discloses a device for quickly grinding both ends of a wrench. The wrench is placed in a lying state in a carrier, and one end of the wrench is cantilevered out, and then enters a pair of grinding rollers opposite to each other for grinding. Although the device realizes double-sided grinding of the wrench, the operator needs to place multiple wrenches at one time for loading. After the grinding is completed, all the multiple wrenches must be taken out before the next batch of loading can be carried out. The waiting time for loading and unloading of the grinding equipment is long.

[0004] Therefore, it is necessary to provide a new automatic wrench grinding and polishing equipment and processing method to solve the above-mentioned technical problems. [Summary of the invention]

[0005] The main purpose of the present invention is to provide an automatic wrench grinding and polishing device, which can simultaneously realize wrench loading, double-sided grinding and wrench unloading, thereby greatly improving the wrench grinding and polishing efficiency.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme: a wrench automatic grinding and polishing device, comprising:

[0007] The wrench feeding unit comprises a first driving member, a turntable driven by the first driving member to rotate, and a fixed back plate arranged close to the back of the turntable, wherein the turntable is provided with a plurality of hollow limit grooves in an annular shape for accommodating wrenches; a wrench loading station, a wrench unloading station and a wrench grinding station are arranged around the turntable, and a first avoidance notch is arranged on the fixed back plate corresponding to the wrench grinding station; when the wrench moves to the wrench grinding station along with the turntable, the front and back sides of one end of the wrench are exposed and protrude from the surface of the turntable;

[0008] A grinding unit is arranged at the wrench grinding station, and includes a first grinding module and a second grinding module which are relatively arranged on the front and rear sides of the turntable, wherein the first grinding module and the second grinding module both include a second driving member, a support plate driven by the second driving member to move forward and backward, a third driving member fixed on the support plate, and a grinding wheel driven by the third driving member to rotate, wherein the axial end face of the grinding wheel is a grinding working surface; the axial end faces of the two grinding wheels are arranged opposite to each other and a gap is provided, and the wrench on the turntable rotates through the gap.

[0009] Furthermore, the limiting groove includes a first limiting groove for accommodating the large head of the wrench radially outward and a second limiting groove for accommodating the small head of the wrench radially outward.

[0010] Furthermore, an end limit module for limiting the wrench close to the center of the turntable is provided at the first avoidance gap; the end limit module includes a pair of limit plates relatively located at the front and rear sides of the turntable; a limit slot is formed between the pair of limit plates, and when the wrench moves to the first avoidance gap as the turntable moves to the first avoidance gap, one end of the wrench close to the turntable extends into the limit slot, and the other end is outside the limit slot and located in the limit slot.

[0011] Furthermore, it also includes a protective cover that encloses a part of the grinding station area; a grinding working chamber is formed inside the protective cover, and the two grinding wheels partially extend into the grinding working chamber, and the turntable carries the wrench and rotates into the grinding working chamber.

[0012] Furthermore, a turntable inlet is provided at the upper portion of the protective cover, and a first brush is provided at the turntable inlet.

[0013] Furthermore, it also includes a coolant nozzle that sprays coolant at the inlet of the turntable; the coolant nozzle sprays the cooling liquid onto the turntable, and the cooling liquid flows downward along the turntable to the wrench located at the wrench grinding station.

[0014] Furthermore, it also includes a second brush for cleaning debris from the polished surface of the wrench; the second brush is arranged between the wrench polishing station and the wrench unloading station.

[0015] Furthermore, it also includes a wrench front and back detection module; the wrench front and back detection module is arranged between the wrench loading station and the wrench grinding station, and is arranged on the front side of the turntable; the wrench front and back detection module includes a pressure wheel for pressing one end of the wrench and a sensing component for sensing the height of the surface of the other end of the wrench; the sensing component includes a mounting bracket, a sensing sheet rotatably arranged at the bottom of the mounting bracket, a sensing roller rotatably arranged at one end of the sensing sheet and in contact with the surface of the wrench, a sensor fixed on the mounting bracket and sensing the other end of the sensing sheet, and a spring for pressing down one end of the sensing sheet close to the sensing roller.

[0016] Furthermore, it also includes a first front and back detection module for detecting the front and back of the wrench in the first limit groove and a second front and back detection module for detecting the front and back of the wrench in the second limit groove; the first front and back detection module and the second front and back detection module both include a mounting bracket, a sensing plate rotatably arranged at the bottom of the mounting bracket, a sensing roller rotatably arranged at one end of the sensing plate and in contact with the surface of the wrench, a sensor fixed on the mounting bracket and sensing the other end of the sensing plate, and a spring that presses down one end of the sensing plate close to the sensing roller.

[0017] Another object of the present invention is to provide a processing method based on the automatic grinding and polishing device of the wrench as described above, comprising the following steps:

[0018] S1, placing a wrench on the turntable;

[0019] S2, the wrench passes through the forward and reverse detection station as the turntable rotates, and a wrench forward and reverse detection module arranged at the forward and reverse detection station detects whether the wrench is placed in a correct direction; the wrench forward and reverse detection module includes a pressure wheel for holding one end of the wrench and a sensing component for sensing the height of the surface of the other end of the wrench;

[0020] S3, the wrench with the correct direction rotates to the wrench grinding station as the turntable rotates, the first grinding module and the second grinding module move closer to each other, and double-sided grinding is performed on the end of the wrench away from the center of the turntable;

[0021] S4, after the grinding is completed, the wrench rotates through the cleaning station, and the surface debris is cleaned by a second brush arranged at the cleaning station;

[0022] S5, the wrench is rotated to the wrench unloading station, and the wrench is removed.

[0023] Compared with the prior art, the invention provides a wrench automatic grinding and polishing device and processing method with the beneficial effect that it can simultaneously realize wrench loading, double-sided grinding and wrench unloading, greatly improving the wrench grinding and polishing efficiency. Specifically:

[0024] (1) A turntable structure is used to feed the wrench. A plurality of hollow storage grooves are arranged in a ring shape on the turntable to carry and limit the wrench. A fixed back plate is arranged on the back of the turntable to support the back of the wrench. The position is avoided at the grinding station so that when the wrench is rotated to the grinding station, both the front and back sides are exposed. Two grinding wheels are used to grind both sides of one end of the wrench at the same time. After grinding, the wrench is rotated to the unloading station for unloading. The loading, grinding and unloading of the wrench can be carried out simultaneously, which lays an important foundation for greatly improving the grinding efficiency.

[0025] (2) The presence of a storage groove at the grinding position can ensure the position stability of the wrench during grinding. The end limit module is used to limit the end position of the other end of the wrench, effectively preventing one end of the wrench from escaping from the storage groove during grinding, further ensuring the position stability of the wrench during grinding, while ensuring the grinding accuracy of the wrench;

[0026] (3) A wrench positive and negative detection module is set upstream of the grinding station to detect the positive and negative sides of the wrench on the turntable to prevent the operator from reversely wrench when loading materials, ensuring that the wrench grinding is reliable and effective;

[0027] (4) A brush is arranged downstream of the grinding station to realize automatic cleaning of surface debris of the wrench after grinding.

Brief Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure of the wrench feeding unit in an embodiment of the present invention;

[0030] Figure 3 It is a front structural schematic diagram of a wrench feeding unit in an embodiment of the present invention;

[0031] Figure 4 It is a partial structural schematic diagram of the wrench feeding unit in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the end limit module in an embodiment of the present invention;

[0033] Figure 6 It is a structural schematic diagram of a grinding unit in an embodiment of the present invention;

[0034] Figure 7 It is a structural schematic diagram of a wrench forward and reverse detection module on a turntable in an embodiment of the present invention;

[0035] Figure 8 It is a structural schematic diagram of a wrench in an embodiment of the present invention;

[0036] Fig. 9 Schematic diagram of the structure of the first front and back detection module in an embodiment of the present invention;

[0037] The numbers in the figure represent:

[0038] 100-wrench automatic grinding and polishing equipment;

[0039] 200-wrench;

[0040] 1- Working platform;

[0041] 2-wrench feeding unit, 21-first driving member, 22-turntable, 221-limiting groove, 2211-profile limiting groove, 2212-first limiting groove, 2213-second limiting groove, 23-fixed back plate, 231-first avoidance gap, 232-second avoidance gap, 24-end limiting module, 241-limiting plate, 242-limiting slide groove, 243-position adjustment component, 2431-fixed support plate, 2432-slide rail, 2433-movable plate, 2434-adjusting screw;

[0042] 3-grinding unit, 31-first grinding module, 311-second driving member, 312-supporting plate, 313-third driving member, 314-grinding wheel, 32-second grinding module;

[0043] 4-protective cover, 41-grinding working chamber, 42-turntable inlet, 43-first brush, 44-coolant nozzle;

[0044] 5- Second brush;

[0045] 6-wrench front and back detection module, 61-first front and back detection module, 611-pressure wheel, 612-sensing component, 6121-mounting bracket, 6122-sensing sheet, 6123-sensing roller, 6124-sensor, 6125-spring, 62-second front and back detection module. [Specific implementation method]

[0046] Embodiment 1:

[0047] Please refer to Figure 1-Figure 9 The present embodiment is a wrench automatic grinding and polishing device 100, which includes a working platform 1, a wrench feeding unit 2 arranged on the working platform 1 and performing annular feeding, a wrench loading station, a positive and negative detection station, a wrench grinding station, a cleaning station and a wrench unloading station arranged in sequence around the wrench feeding unit 2, a grinding unit 3 arranged at the wrench grinding station, and a protective cover 4 that encloses a part of the grinding station area to form a grinding working chamber 41.

[0048] The wrench feeding unit 2 includes a first driving member 21, a turntable 22 driven by the first driving member 21 to rotate around a horizontal axis, and a fixed back plate 23 arranged close to the back of the turntable 22. The turntable 22 is a vertical disc structure, and a plurality of limit grooves 221 are arranged at equal angles in the circumferential direction on the turntable 22. The limit grooves 221 are through-through from front to back, and the limit grooves 221 include contoured limit grooves 2211 that are contoured with the two end sections of the wrench 200. The contoured limit grooves 2211 are contoured with the two ends of the wrench 200 to accurately position the wrench 200.

[0049] The fixed back plate 23 is mainly used to block the back of the limiting groove 221 to serve as a limiting support on one side of the wrench 200 to prevent the wrench 200 from falling from the limiting groove 221. A first avoidance notch 231 for avoiding the wrench grinding station is provided on the fixed back plate 23. The limiting groove 221 corresponding to the wrench grinding station on the turntable 22 is not blocked by the fixed back plate 23, so that the grinding unit 3 can approach the turntable 22 from the front and back sides to grind the back and front of the wrench 200 at the same time.

[0050] The depth of the limiting groove 221 is less than the thickness of the wrench 200, so that after the wrench 200 is placed in the limiting groove 221, the surface of the end to be polished protrudes from the front surface of the turntable 22, and when the wrench 200 is moved to the wrench polishing station, since the back is not blocked by the fixed back plate 23, the back of the wrench 200 also protrudes from the rear surface of the turntable 22, so that the polishing unit 3 can perform double-sided polishing on one end of the wrench 200.

[0051] Generally, both ends of the wrench 200 need to be polished. In order to meet this demand, the limiting groove 221 includes a first limiting groove 2212 for storing the large head of the wrench radially outward and a second limiting groove 2213 for storing the small head of the wrench radially outward. Through the arrangement of the first limiting groove 2212 and the second limiting groove 2213, two wrenches placed in different directions can be carried at the same time. If the large head of the wrench is placed outside in the first limiting groove 2212, after rotating to the wrench polishing station, the polishing unit 3 performs double-sided polishing on the small head end of the wrench; if the small head of the wrench is placed outside in the second limiting groove 2213, after rotating to the wrench polishing station, the polishing unit 3 performs double-sided polishing on the large head end of the wrench, thereby achieving double-sided polishing of both ends of the wrench. In this embodiment, the first limiting groove 2212 and the second limiting groove 2213 are arranged alternately.

[0052] Since the wrench at the wrench grinding station is only constrained by the contour of the limit groove 221, and the grinding only acts on one end of the wrench 200, the other end of the wrench 200 is easily lifted up and out of the limit groove 221 and falls. In order to avoid this phenomenon, an end limit module 24 is further provided at the first avoidance gap 231 to limit the end of the wrench 200 close to the center of the turntable 22.

[0053] The end limit module 24 includes a pair of limit plates 241 relatively located at the front and rear sides of the turntable 22. A limit slot 242 is formed between the pair of limit plates 241. When the wrench 200 moves to the first avoidance notch 231 along with the turntable 22, one end close to the turntable 22 extends into the limit slot 242, and the other end is outside the limit slot 242 and located in the limit slot 221. When the wrench 200 moves to the wrench grinding station, the end that does not extend into the limit slot 242 passes through the grinding unit 3 to achieve double-sided grinding. The limit range of the limit slot 242 covers the arc area formed between the two limit slots 221 close to the first avoidance notch 231, so as to ensure that the wrench 200 will not fall when rotating from the previous rotation position to the wrench grinding position, and will not fall when rotating from the wrench grinding position to the next rotation position. For other rotation positions, there is a fixed back plate 23 body for back support, so it will not fall.

[0054] The end limit module 24 also includes two position adjustment components 243 for adjusting the distance between the front and rear limit plates 241. The position adjustment component 243 includes a fixed support plate 2431, a slide rail 2432 extending forward and backward on the fixed support plate 2431, a movable plate 2433 slidably arranged on the slide rail 2432, and an adjustment screw 2434 for adjusting the front and rear position of the movable plate 2433, and the limit plate 241 is fixed on the movable plate 2433.

[0055] The grinding unit 3 includes a first grinding module 31 and a second grinding module 32 which are arranged front and back relative to each other. A gap is arranged between the first grinding module 31 and the second grinding module 32, and the wrench on the turntable 22 rotates through the gap. The first grinding module 31 and the second grinding module 32 both include a second driving member 311, a support plate 312 driven by the second driving member 311 to move back and forth, a third driving member 313 fixed on the support plate 312, and a grinding wheel 314 driven by the third driving member 313 to rotate, the axial end surface of the grinding wheel 314 is a grinding working surface, and the axial end surfaces of the two grinding wheels 314 are arranged opposite to each other and form the gap. When the wrench 200 enters the gap, the two grinding wheels 314 move close to each other and close to the front and back surfaces of the wrench 200, and perform double-sided grinding synchronously.

[0056] A grinding working chamber 41 is formed around the inside of the protective cover 4 , and two grinding wheels 314 partially extend into the grinding working chamber 41 . The turntable 22 carries the wrench 200 and rotates into the grinding working chamber 41 .

[0057] A turntable inlet 42 is disposed at the upper portion of the protective cover 4 , and a first brush 43 is disposed at the turntable inlet 42 , and the first brush 43 is used to clean the surface impurities of the wrench 200 before grinding.

[0058] This embodiment also includes a coolant nozzle 44 that sprays coolant toward the turntable inlet 42. The coolant nozzle 44 sprays coolant onto the turntable 22, and the coolant flows down along the turntable 22 onto the wrench at the wrench grinding station, thereby reducing the temperature of the wrench grinding area when the wrench is being ground.

[0059] This embodiment further includes a second brush 5 disposed at the cleaning station and used to clean debris from the polished wrench surface. The second brush 5 is disposed between the wrench polishing station and the wrench unloading station. After the wrench 200 is polished and comes out of the protective cover 4, it rotates past the second brush 5, and the second brush 5 cleans debris from the polished wrench surface.

[0060] Two groups of second brushes 5 are provided, one group is provided at the front side of the turntable 22, and the other group is provided at the rear side of the turntable 22. A second avoidance notch 232 is provided on the fixed back plate 3 at the position of the second brush 5 corresponding to the rear side of the turntable 22, so that the second brush 5 located at the rear side of the turntable 22 can clean the debris on the back side of the wrench.

[0061] like Figure 8 As shown, the wrench 200 polished in this embodiment has a large head end A and a small head end B, the upper surface of the large head end is flush with the upper surface of the small head end, but the lower surfaces of the two have a height difference and are located in different height planes. The side where the large and small heads are flush is set as the front side, and the other opposite side is set as the back side. In order to ensure the polishing accuracy, the polishing reference surface will be pre-set in the control system, and the feed amount of the first polishing module 31 and the second polishing module 32 will also be set in advance; if the direction of the wrench is reversed when loading, it is easy to have a deep grinding effect on one side and a shallow grinding effect on the other side, which does not meet the design requirements. Therefore, in order to prevent the wrench from being reversed in the loading direction, this embodiment also includes a wrench forward and reverse detection module 6 arranged at the forward and reverse detection station. The wrench forward and reverse detection module 6 is arranged between the wrench loading station and the wrench polishing station, and is arranged on the front side of the turntable 22.

[0062] The wrench front and back detection module 6 includes a first front and back detection module 61 for detecting the front and back of the wrench in the first limiting groove 2212 and a second front and back detection module 62 for detecting the front and back of the wrench in the second limiting groove 2213 .

[0063] The first front and back detection module 61 and the second front and back detection module 62 both include a pressure wheel 611 for pressing one end of the wrench and a sensing component 612 for sensing the height of the surface of the other end of the wrench. The sensing component 612 includes a mounting bracket 6121, a sensing sheet 6122 rotatably arranged at the bottom of the mounting bracket 6121, a sensing roller 6123 rotatably arranged at one end of the sensing sheet 6122 and in contact with the surface of the wrench, a sensor 6124 fixed on the mounting bracket 6121 and sensing the other end of the sensing sheet 6122, and a spring 6125 for pressing down one end of the sensing sheet 6122 close to the sensing roller 6123. The pressure wheel 611 is used to press one end of the wrench 200, and the sensing component 612 is used to detect the height of the surface of the other end of the wrench 200, thereby determining the front and back of the wrench.

[0064] The wrench loading station and the wrench unloading station can be provided in plurality according to demand.

[0065] The present embodiment provides a processing method for a wrench automatic grinding and polishing device, which comprises the following steps:

[0066] S1, placing the wrench 200 into the first limiting groove 2212 on the rotating disk 22 to load the wrench 200;

[0067] S2, the wrench 200 rotates with the turntable 22 and passes through the wrench forward and reverse detection module 6 to detect whether the wrench 200 is placed in the correct direction;

[0068] S3, the wrench with the correct direction rotates to the wrench grinding station along with the turntable 22, the first grinding module 31 and the second grinding module 32 move closer to each other, and the end of the wrench 200 away from the center of the turntable 22 is double-sided ground;

[0069] S4, after the grinding is completed, the wrench 200 rotates through the second brush 5 to clean the surface debris;

[0070] S5. The wrench 200 is rotated to the wrench unloading station, and the wrench 200 is removed.

[0071] The processing method also includes:

[0072] S6, turning the removed wrench 200 around and placing it in the second limiting groove 2213 on the rotating disk 22;

[0073] S7. Repeat steps S2 to S5 to complete double-sided grinding of both ends of the wrench.

[0074] Embodiment 2:

[0075] The structure of this embodiment is basically the same as that of the first embodiment, except that the turntable 22 is driven by the first driving member 21 to rotate horizontally around the vertical axis. The turntable 22 is a horizontal disc structure. The fixed back plate 23 is arranged below the turntable 22, the pair of limit plates 241 are arranged on the upper and lower sides of the turntable 22 in an up-down manner, the first polishing module 31 and the second polishing module 32 are arranged on the upper and lower sides of the turntable 22 in an up-down manner, and the wrench positive and negative detection module 6 is arranged above the turntable 22.

[0076] For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, all of which fall within the protection scope of the present invention.

Claims

1. A wrench automatic grinding and polishing device, characterized in that: It includes: The wrench feeding unit comprises a first driving member, a turntable driven by the first driving member to rotate, and a fixed back plate arranged close to the back of the turntable, wherein the turntable is provided with a plurality of hollow limit grooves in an annular shape for accommodating the wrenches; A wrench loading station, a wrench unloading station and a wrench grinding station are arranged around the turntable, and a first avoidance gap is arranged on the fixed back plate corresponding to the wrench grinding station; when the wrench moves to the wrench grinding station along with the turntable, the front and back sides of one end of the wrench are exposed and protrude from the turntable surface; A grinding unit is arranged at the wrench grinding station, and includes a first grinding module and a second grinding module which are relatively arranged on the front and rear sides of the turntable, wherein the first grinding module and the second grinding module both include a second driving member, a support plate driven by the second driving member to move forward and backward, a third driving member fixed on the support plate, and a grinding wheel driven by the third driving member to rotate, wherein the axial end face of the grinding wheel is a grinding working surface; the axial end faces of the two grinding wheels are arranged opposite to each other and a gap is provided, and the wrench on the turntable rotates through the gap.

2. The automatic wrench grinding and polishing device according to claim 1, characterized in that: The limiting groove includes a first limiting groove for accommodating the large head of the wrench radially outward and a second limiting groove for accommodating the small head of the wrench radially outward.

3. The automatic wrench grinding and polishing device according to claim 1, characterized in that: An end limit module is provided at the first avoidance gap to limit the wrench near one end of the center of the turntable; the end limit module includes a pair of limit plates relatively located at the front and rear sides of the turntable; a limit slot is formed between the pair of limit plates, and when the wrench moves to the first avoidance gap as the turntable moves, one end of the wrench near the turntable extends into the limit slot, and the other end is outside the limit slot and located in the limit slot.

4. The automatic wrench grinding and polishing device according to claim 1, characterized in that: It also includes a protective cover that encloses a partial area of ​​the grinding station; a grinding working chamber is formed around the inside of the protective cover, and the two grinding wheels partially extend into the grinding working chamber, and the turntable carries the wrench and rotates into the grinding working chamber.

5. The automatic wrench grinding and polishing device according to claim 4, characterized in that: A turntable inlet is arranged on the upper part of the protective cover, and a first brush is arranged at the turntable inlet.

6. The automatic wrench grinding and polishing device according to claim 5, characterized in that: It also includes a coolant nozzle aimed at the inlet of the turntable to spray coolant; the coolant nozzle sprays the coolant onto the turntable, and the coolant flows downward along the turntable to the wrench located at the wrench grinding station.

7. The automatic wrench grinding and polishing device according to claim 1, characterized in that: It also includes a second brush for cleaning debris from the polished surface of the wrench; the second brush is arranged between the wrench polishing station and the wrench unloading station.

8. The automatic wrench grinding and polishing device according to claim 1, characterized in that: It also includes a wrench front and back detection module; the wrench front and back detection module is arranged between the wrench loading station and the wrench grinding station, and is arranged on the front side of the turntable; the wrench front and back detection module includes a pressure wheel for pressing one end of the wrench and a sensing component for sensing the height of the surface of the other end of the wrench; the sensing component includes a mounting bracket, a sensing sheet rotatably arranged at the bottom of the mounting bracket, a sensing roller rotatably arranged at one end of the sensing sheet and in contact with the surface of the wrench, a sensor fixed on the mounting bracket and sensing the other end of the sensing sheet, and a spring for pressing down one end of the sensing sheet close to the sensing roller.

9. The automatic wrench grinding and polishing device according to claim 2, characterized in that: It also includes a first front and back detection module for detecting the front and back of the wrench in the first limit groove and a second front and back detection module for detecting the front and back of the wrench in the second limit groove; the first front and back detection module and the second front and back detection module both include a mounting bracket, a sensing sheet rotatably arranged at the bottom of the mounting bracket, a sensing roller rotatably arranged at one end of the sensing sheet and in contact with the surface of the wrench, a sensor fixed on the mounting bracket and sensing the other end of the sensing sheet, and a spring that presses down one end of the sensing sheet close to the sensing roller.

10. A processing method based on the automatic wrench grinding and polishing device as claimed in claim 1, characterized in that: The following steps are involved: S1, placing a wrench on the turntable; S2, the wrench passes through the forward and reverse detection station as the turntable rotates, and a wrench forward and reverse detection module arranged at the forward and reverse detection station detects whether the wrench is placed in a correct direction; the wrench forward and reverse detection module includes a pressure wheel for holding one end of the wrench and a sensing component for sensing the height of the surface of the other end of the wrench; S3, the wrench with the correct direction rotates to the wrench grinding station as the turntable rotates, the first grinding module and the second grinding module move closer to each other, and double-sided grinding is performed on the end of the wrench away from the center of the turntable; S4, after the grinding is completed, the wrench rotates through the cleaning station, and the surface debris is cleaned by a second brush arranged at the cleaning station; S5, the wrench is rotated to the wrench unloading station, and the wrench is removed.

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