Sheet metal part chamfering and grinding device and method

Abstract

The chamfering and grinding device comprises a machine body, a sliding block is arranged at the top of the machine body, the sliding block can move back and forth on the top of the machine body, a grinding assembly is arranged on the sliding block, the output end of the grinding assembly extends out of the top end of the sliding block, and the grinding assembly is used for chamfering and grinding the edge of the sheet metal part; the grinding assembly comprises a grinding motor and a chamfering grinding head, and the chamfering grinding head is installed at the output end of the grinding motor. A dust suction cover is arranged above the sliding block, the dust suction cover is connected with a dust suction pipe in an inner cavity of the machine body, the dust suction pipe is connected with a dust suction assembly, and the dust suction assembly is used for adsorbing and filtering chippings generated by polishing; a guide seat is arranged on the side, opposite to the sliding block, of the top of the machine body, a driving screw rod is arranged on the top of the machine body and is in threaded connection with the guide seat, a driving seat is arranged above the guide seat and is electrically connected with the machine body, and a pressing screw rod is rotationally connected to the top of the driving seat.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet metal processing, in particular to a device and method for chamfering and grinding sheet metal parts. Background Art

[0002] Sheet metal parts are fundamental components in numerous industrial fields, including automotive manufacturing, machining, and aerospace. Their processing quality directly impacts the performance and safety of the entire machine. Chamfering and grinding, a critical post-forming process for sheet metal parts, aims to eliminate edge burrs, optimize corner contours, and ensure subsequent assembly accuracy and safety during use. However, current sheet metal chamfering and grinding operations present challenges, such as high labor intensity and the resulting splashing of metal debris.

[0003] Patent publication number CN111872692B discloses a method for spherically chamfering the edges of sheet metal parts. The method comprises a base, a support frame mounted on the base, a Y-axis drive mechanism mounted on the support frame, a chassis mounted on the Y-axis drive mechanism, a drive motor mounted inside the chassis, an X-axis drive mechanism mounted on the output shaft of the drive motor extending through the chassis, and a grinding head mounted on the X-axis drive mechanism. This method for spherically chamfering the edges of sheet metal parts involves the interaction between the X-axis and Y-axis movements of the grinding head, causing the grinding head to perform spherical chamfering on two corners on one side of the sheet metal part. The drive motor embedded in the chassis then drives the X-axis drive mechanism to rotate 180° clockwise, causing the grinding head to perform spherical chamfering on two corners on the other side of the sheet metal part.

[0004] The method for spherical chamfering of sheet metal edges provided by the aforementioned patent is essentially a grinding method for chamfering sheet metal parts. Although this method does not require manual handling of sheet metal parts for chamfering, which reduces the workload of operators, it is inconvenient to handle the debris generated during the processing, and the problem of metal debris splashing still exists. The splashing metal debris not only pollutes the surrounding environment, but may also cause scratches to nearby operators. At the same time, if the splashing debris falls into the gap of the equipment's drive mechanism, it will also aggravate component wear, affecting the movement accuracy and equipment life. Summary of the Invention

[0005] The purpose of the present invention is to provide a sheet metal chamfering and grinding device and method, aiming to improve the problem that the existing processing method is inconvenient to handle the debris generated during the processing, resulting in metal debris splashing.

[0006] The present invention is achieved in that: In order to achieve the above-mentioned purpose, according to one aspect of the present invention, the present invention provides a sheet metal chamfering and grinding device, including a body, a slider is provided on the top of the body, the slider can move back and forth on the top of the body, a grinding assembly is provided on the slider, the output end of the grinding assembly protrudes from the top of the slider, and the grinding assembly is used to chamfer and grind the edge of the sheet metal; the grinding assembly includes a grinding motor and a chamfering grinding head, and the chamfering grinding head is installed at the output end of the grinding motor; a dust cover is provided above the slider, and the dust cover is connected to the dust suction pipe in the body cavity The dust collection pipe is connected to a dust collection component, and the dust collection component is used to absorb and filter the debris generated by grinding; a guide seat is provided on the top of the body opposite to the slider, and a driving screw is provided on the top of the body, and the driving screw is threadedly connected to the guide seat, and a driving seat is provided above the guide seat, and the driving seat is electrically connected to the body, and a clamping screw is rotatably connected to the top of the driving seat, and the clamping screw is threadedly connected to the guide seat, which is used to drive the driving seat to move up and down, so as to facilitate the adjustment of the gap between the driving seat and the guide seat according to the thickness of the sheet metal.

[0007] Preferably, a control panel is provided on the front of the body, supporting feet are provided at the corners of the bottom surface of the body, a guide groove is provided on one side of the top of the body, a first bearing is provided at both ends of the guide groove, and a guide port is provided on the side of the top of the body opposite to the guide groove; the dust suction tube protrudes from the top of the body, and a first connecting cap is provided at the bottom end of the dust suction tube; a connecting wire is provided on the side of the body, and an electrical plug is provided at the end of the connecting wire.

[0008] Preferably, a second bearing is provided in the middle of the slider, and bayonet holes are symmetrically provided on both sides of the slider, the slider is engaged with the inner side of the guide hole, and mounting grooves are provided at the top and bottom of the inner side of the bayonet hole, and a plurality of rollers are evenly provided inside the mounting grooves, and plug-in grooves are symmetrically provided on both sides of the slider, and a top screw is provided on the side of the slider aligned with the plug-in groove; a plurality of pressure springs are provided on the side of the slider away from the guide seat, a telescopic guide rod is provided inside the pressure spring, a mounting plate is provided at the end of the telescopic guide rod, mounting holes are provided on both sides of the mounting plate, and the mounting plate is fixed to the machine body by bolts passing through the mounting holes.

[0009] Preferably, a connecting plate is provided on the top of the grinding motor, a connecting hole is provided on the connecting plate, the grinding motor is fixed to the bottom surface of the slider by means of bolts passing through the connecting hole, a transmission shaft is provided at the output end of the grinding motor, the top end of the transmission shaft protrudes from the slider, a plug-in column is provided in the middle of the transmission shaft, a sleeve joint is provided at the bottom end of the chamfering grinding head, a sleeve groove is provided in the middle of the sleeve joint, the sleeve groove is sleeved on the plug-in column, and a tightening bolt is provided on the side of the sleeve joint.

[0010] Preferably, both ends of the driving screw are provided with a connecting part, the connecting part is interference connected with the first bearing, and one end of the driving screw protrudes out of the body, and the end of the driving screw protruding out of the body is provided with a first rotating handle, and the edge of the first rotating handle is provided with a crank.

[0011] Preferably, the guide seat is evenly provided with a plurality of fixing grooves, the fixing grooves are each provided with a guide roller, and the guide seat is symmetrically provided with guide rods on both sides of the side away from the slider; and a support rod is provided between the two guide rods, the support rod is L-shaped, and the top of the support rod is provided with a first threaded hole; the bottom end of the guide seat is provided with a connecting block, the middle of the connecting block is provided with a second threaded hole, the connecting block is inserted into the guide groove, and the second threaded hole is connected to the driving screw; the bottom surface of the driving seat is aligned with the guide roller and is also provided with a guide roller, and the driving seat has its One of the guide rollers is connected to a driving motor, and the driving seat is aligned with the position of the guide plug rod and is provided with a sleeve frame, a sleeve hole is provided in the middle of the sleeve frame, and the sleeve hole is sleeved on the guide plug rod, a spring wire is provided on the side of the driving motor, and a connecting plug is provided at the bottom end of the spring wire, and the connecting plug is plugged into the body; an adapter is provided on the upper surface of the driving seat, and a third bearing is provided in the middle of the adapter, the clamping screw is connected to the first threaded hole, a second rotating handle is provided on the top of the clamping screw, and a connecting shaft is provided at the bottom end of the clamping screw, and the connecting shaft is interference connected with the third bearing.

[0012] Preferably, the dust suction hood is provided with a feeding port in the direction of the guide seat, and plug plates are symmetrically provided on both sides of the bottom of the dust suction hood, the plug plates are inserted into the inner sides of the plug-in slots, a connecting pipe is provided on the side of the dust suction hood, and an adapter cap is provided on the bottom surface of the connecting pipe, and the adapter cap is connected to the dust suction pipe; the dust suction assembly includes a fan and a filter cartridge, the suction end of the fan is provided with a suction pipe, the end of the suction pipe is provided with a second connecting cap, the filter cartridge is installed between the dust suction pipe and the suction pipe, and a plurality of filter plates with different apertures are provided inside the filter cartridge, which is convenient for filtering debris of different particles, and external tubes are provided at both ends of the filter cartridge, and the two external tubes are respectively connected to the suction pipe and the dust suction pipe; the exhaust end of the fan is provided with an exhaust pipe, and the bottom end of the fan is provided with a fixed foot, and a plurality of fixing holes are provided on both sides of the fixed foot.

[0013] Preferably, it also includes an inspection cover, an inspection port is provided on the back of the body, and card slots are provided at the top and bottom of the inspection port. The inspection cover is provided with multiple heat dissipation holes, and card edges are provided at the top and bottom of the inspection cover, the card edges are engaged in the card slots, and a pull groove is provided on the outer side of the inspection cover.

[0014] According to a second aspect of the present invention, a method for chamfering a sheet metal part is provided, wherein the specific steps of the method are as follows: S100. Select a suitable chamfering grinding head according to the chamfering requirements, then install the chamfering grinding head on the output end of the grinding motor, and then install and secure the dust cover; S200, adjusting the gap between the guide seat and the drive seat using a compression screw according to the thickness of the sheet metal part, so that the sheet metal part can move under the drive seat; S300, adjusting the distance between the guide seat and the slider according to the width of the sheet metal part to ensure that the edge of the sheet metal part can rest against the chamfering grinding head; S400, start the entire equipment, then insert the sheet metal plate to be polished into the gap between the guide seat and the drive seat, and the edge of the sheet metal plate is driven by the drive seat to slowly pass through the chamfered polishing joint to achieve chamfering of the sheet metal plate; S500: The debris generated during the chamfering process will be sucked away by the dust collection component, which will filter the sucked debris and discharge it into clean air; S600, after sheet metal processing is completed, open the machine body and clean the dust collection component.

[0015] Preferably, during the process of grinding the sheet metal, the end of the sheet metal that needs to be chamfered rests on the chamfer grinding joint. Since a pressure spring is provided on the slider, the elastic force provided by the pressure spring will make the chamfer grinding head stably pressed on the sheet metal, thereby achieving stable and uniform grinding of the sheet metal.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention facilitates the grinding of the edges of sheet metal parts by installing a grinding motor and a chamfering grinding head on the slider. The chamfering grinding head can be replaced according to usage requirements, and it is convenient to replace a suitable chamfering grinding head according to the chamfering requirements. A dust suction hood is provided above the grinding head. The dust suction hood cooperates with the suction component to absorb the debris generated by grinding to avoid the debris splashing, which greatly facilitates the processing of the debris generated by grinding.

[0017] 2. The present invention arranges a driving seat above the guide seat, and the cooperation of the two can drive the sheet metal to move, and the edge of the sheet metal that needs to be chamfered rests on the chamfering grinding head, thereby achieving fast and uniform grinding of the edge of the sheet metal.

[0018] 3. The present invention provides a spring between the slider and the body, so that the chamfering grinding head can be pressed tightly against the sheet metal part, making it convenient to perform stable grinding on the sheet metal part.

[0019] 4. The present invention provides an inspection cover on the back of the machine body, which makes it easy to open the machine body using the inspection cover, making it easier to inspect and maintain the interior of the machine body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic structural diagram of the present invention as a whole; Figure 2 It is a schematic structural diagram of the machine body of the present invention from a front oblique downward perspective; Figure 3 It is a schematic structural diagram of the machine body of the present invention from an oblique downward perspective at the rear end; Figure 4 It is a structural schematic diagram of the slider of the present invention; Figure 5 It is a schematic structural diagram of the grinding assembly of the present invention; Figure 6 It is a structural schematic diagram of the driving screw of the present invention; Figure 7 It is a structural schematic diagram of the guide seat of the present invention; Figure 8 It is a structural schematic diagram of the drive seat of the present invention; Figure 9 1 is a schematic structural diagram of the compression screw of the present invention; Figure 10 It is a structural schematic diagram of the dust collection hood of the present invention; Figure 11 It is a structural schematic diagram of the dust collection assembly of the present invention; Figure 12 It is a structural schematic diagram of the inspection cover of the present invention; Figure 13 It is a flow chart of the polishing method of the present invention.

[0021] In the figure: 1. Machine body; 11. Control panel; 12. Support foot; 13. Guide groove; 14. First bearing; 15. Guide port; 16. Dust pipe; 161. First connecting cap; 17. Connecting wire; 171. Connecting plug; 18. Inspection port; 181. Card slot; 2. Slider; 21. Second bearing; 22. Plug slot; 23. Card slot; 24. Mounting slot; 25. Roller; 26. Top screw; 27. Pressure spring; 28. Telescopic guide rod; 29. ​​Mounting plate; 291. Mounting hole; 3. Grinding assembly; 31. Grinding motor; 311. Drive shaft; 312. Plug column; 313. Connecting plate; 314. Connecting hole; 32. Chamfering grinding head; 321. Socket joint; 322. Socket slot; 323. Clamping bolt; 4. Driving screw; 41. Adapter; 42. First rotating handle; 43 , crank handle; 5, guide seat; 51, fixing groove; 52, guide roller; 53, guide plug; 54, support rod; 55, first threaded hole; 56, connecting block; 57, second threaded hole; 6, drive seat; 61, drive motor; 62, sleeve frame; 63, sleeve hole; 64, spring line; 65, connecting plug; 66, adapter; 67, third bearing; 7, pressing screw; 71, second rotating handle; 72, connecting shaft; 8, dust hood; 81, feeding port; 82, plug plate; 83, connecting pipe; 84, adapter cap; 9, dust collection assembly; 91, fan; 911, suction pipe; 912, second connecting cap; 913, exhaust pipe; 914, fixing foot; 915, fixing hole; 92, filter cartridge; 921, external pipe; 10, inspection cover; 101, heat dissipation hole; 102, pull groove; 103, card edge. DETAILED DESCRIPTION

[0022] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] The following is a further description with reference to the accompanying drawings and specific embodiments: Example

[0024] like Figure 1 、 Figure 3 and Figure 5As shown, a sheet metal chamfering and grinding device includes a body 1, a slider 2 is provided on the top of the body 1, the slider 2 can move back and forth on the top of the body 1, a grinding assembly 3 is provided on the slider 2, the output end of the grinding assembly 3 protrudes from the top of the slider 2, and the grinding assembly 3 is used to chamfer and grind the edge of the sheet metal; the grinding assembly 3 includes a grinding motor 31 and a chamfering grinding head 32, and the chamfering grinding head 32 is installed at the output end of the grinding motor 31; this structure facilitates the slider 2 to drive the grinding assembly 3 to press against the sheet metal, thereby facilitating and stably chamfering the edge of the sheet metal. A dust hood 8 is provided above the slider 2, and the dust hood 8 is connected to the dust suction pipe 16 in the inner cavity of the body 1, and the dust suction pipe 16 is connected to the dust suction assembly 9, and the dust suction assembly 9 is used to absorb and filter the debris generated by grinding; the dust hood 8 cooperates with the dust suction assembly 9 to facilitate the absorption of the debris generated by grinding to prevent the debris from splashing. A guide seat 5 is provided on the side of the top of the body 1 opposite to the slider 2, and a driving screw 4 is provided on the top of the body 1. The driving screw 4 is threadedly connected to the guide seat 5, and a driving seat 6 is provided above the guide seat 5. The driving seat 6 is electrically connected to the body 1, and a clamping screw 7 is rotatably connected to the top of the driving seat 6. The clamping screw 7 is threadedly connected to the guide seat 5, which is used to drive the driving seat 6 to move up and down, so that the gap between the driving seat 6 and the guide seat 5 can be adjusted according to the thickness of the sheet metal. This structure makes it convenient for the guide seat 5 to cooperate with the driving seat 6 to clamp and drive the sheet metal that needs to be chamfered, facilitates the movement and chamfering of the sheet metal, and facilitates the processing of the sheet metal.

[0025] like Figure 2 and Figure 3 As shown, a control panel 11 is provided on the front of the body 1, and the control panel 11 is used to facilitate the operation of the entire device. Support feet 12 are provided at the corners of the bottom surface of the body 1, and the support feet 12 are used to facilitate the stable placement and use of the body 1. A guide groove 13 is provided on one side of the top of the body 1, and a first bearing 14 is provided at both ends of the guide groove 13. The cooperation between the guide groove 13 and the first bearing 14 is convenient for installing the drive screw 4, and convenient for the rotation and use of the drive screw 4. A guide opening 15 is provided on the side of the top of the body 1 opposite to the guide groove 13; the guide opening 15 is convenient for installing the slider 2, and convenient for the movement of the slider 2. The dust suction pipe 16 protrudes from the top of the body 1, which is convenient for the dust suction pipe 16 to be connected to the dust suction hood 8. A first connecting cap 161 is provided at the bottom end of the dust suction pipe 16; the first connecting cap 161 is convenient for the dust suction pipe 16 to be connected to the dust suction assembly 9. A connection wire 17 is provided on the side of the machine body 1 , and a power plug 171 is provided at the end of the connection wire 17 . The connection wire 17 and the power plug 171 are convenient for connecting the machine body 1 to electricity, and facilitate the operation and use of the machine body 1 .

[0026] like Figure 4As shown, a second bearing 21 is provided in the middle of the slider 2, and the second bearing 21 is convenient for rotationally connecting with the output end of the grinding motor 31. Snap-ons 23 are symmetrically provided on both sides of the slider 2, and the slider 2 is engaged with the inner side of the guide opening 15, so that the slider 2 can move along the guide opening 15. Mounting grooves 24 are provided at the top and bottom of the inner side of the snap-on 23, and a plurality of rollers 25 are evenly provided inside the mounting grooves 24 to reduce the friction between the slider 2 and the body 1. Plug-in grooves 22 are symmetrically provided on both sides of the slider 2, and the plug-in grooves 22 are convenient for installing the dust hood 8, and are convenient for disassembly and use of the dust hood 8. A top screw 26 is provided on the side of the slider 2 aligned with the plug-in groove 22; the top screw 26 is a position for fixing the dust hood 8. A plurality of pressure springs 27 are provided on the side of the slider 2 away from the guide seat 5, and the pressure springs 27 are convenient for making the grinding assembly 3 stable against the edge of the sheet metal. A telescopic guide rod 28 is provided inside the pressure spring 27, and a mounting plate 29 is provided at the end of the telescopic guide rod 28. Mounting holes 291 are provided on both sides of the mounting plate 29. The mounting plate 29 is fixed to the body 1 by bolts passing through the mounting holes 291. The cooperation between the telescopic guide rod 28 and the mounting plate 29 is convenient and stable for guiding the spring, and facilitates the stable extension and contraction of the spring.

[0027] like Figure 5 As shown, the top of the grinding motor 31 is provided with a connecting plate 313, which is provided with a connecting hole 314. The connection plate 313 and the connecting hole 314 cooperate to facilitate the installation of the grinding motor 31. The grinding motor 31 is fixed to the bottom surface of the slider 2 by bolts passing through the connecting hole 314. The output end of the grinding motor 31 is provided with a drive shaft 311, the top end of which protrudes from the slider 2. The drive shaft 311 is used to conveniently drive the chamfering grinding head 32 to rotate. The middle of the drive shaft 311 is provided with a plug-in post 312, which facilitates the assembly and disassembly of the chamfering grinding head 32 and facilitates its use. A sleeve joint 321 is provided at the bottom end of the chamfer grinding head 32, a sleeve groove 322 is provided in the middle of the sleeve joint 321, the sleeve groove 322 is sleeved on the plug-in column 312, and a clamping bolt 323 is provided on the side of the sleeve joint 321. The clamping bolt 323 is convenient for fixing the chamfer grinding head 32 and facilitating the disassembly and replacement of the chamfer grinding head 32.

[0028] like Figure 6 As shown, both ends of the drive screw 4 are provided with an adapter portion 41, which is interference-connected with the first bearing 14 to facilitate the rotation of the drive screw 4. One end of the drive screw 4 protrudes from the body 1, and a first rotating handle 42 is provided at the end of the drive screw 4 protruding from the body 1. A crank 43 is provided on the edge of the first rotating handle 42. The first rotating handle 42 cooperates with the crank 43 to facilitate the rotation of the drive screw 4, thereby facilitating the rotation and use of the drive screw 4.

[0029] like Figure 7 、 Figure 6 and Figure 9As shown, the guide seat 5 is evenly provided with multiple fixed grooves 51, and each fixed groove 51 is provided with a guide roller 52. The fixed grooves 51 cooperate with the guide rollers 52 to facilitate guiding the sheet metal parts and reduce the friction between the sheet metal parts and the guide seat 5. Guide rods 53 are symmetrically provided on both sides of the side of the guide seat 5 away from the slider 2; the guide rods 53 facilitate cooperation with the drive seat 6, facilitating the stable up and down movement of the drive seat 6. A support rod 54 is provided between the two guide rods 53. The support rod 54 is L-shaped, and a first threaded hole 55 is provided at the top of the support rod 54; the first threaded hole 55 facilitates the connection between the support rod 54 and the clamping screw 7. A connecting block 56 is provided at the bottom end of the guide seat 5, and a second threaded hole 57 is provided in the middle of the connecting block 56. The connecting block 56 is inserted into the guide groove 13, and the second threaded hole 57 is connected to the drive screw 4; the rotation of the drive screw 4 facilitates the position adjustment of the guide seat 5 and the drive seat 6. A guide roller 52 is also provided at the position where the bottom surface of the drive seat 6 is aligned with the guide roller 52, and one of the guide rollers 52 on the drive seat 6 is connected to a drive motor 61, which facilitates the drive motor 61 to drive the guide roller 52 to rotate, so that the rotating guide roller 52 drives the sheet metal to move. A sleeve frame 62 is provided at the position where the drive seat 6 is aligned with the guide rod 53, and a sleeve hole 63 is provided in the middle of the sleeve frame 62. The sleeve hole 63 is sleeved on the guide rod 53, which facilitates the drive seat 6 to be stably used with the guide seat 5. A spring wire 64 is provided on the side of the drive motor 61, and a connecting plug 65 is provided at the bottom end of the spring wire 64. The connecting plug 65 is plugged into the body 1; it is convenient for the body 1 to control the operation and use of the drive motor 61. An adapter 66 is provided on the upper surface of the drive seat 6, and a third bearing 67 is provided in the middle of the adapter 66. The third bearing 67 is convenient for the drive seat 6 to be connected to the clamping screw 7. The compression screw 7 is connected to the first threaded hole 55. A second rotating handle 71 is provided on the top of the compression screw 7. The second rotating handle 71 facilitates the rotation of the compression screw 7, so that the compression screw 7 can drive the driving seat 6 to move up and down. A connecting shaft 72 is provided at the bottom of the compression screw 7. The connecting shaft 72 is interference-connected with the third bearing 67.

[0030] like Figure 10 and Figure 11As shown, the dust hood 8 is provided with a feed port 81 facing the guide seat 5. This port 81 facilitates the passage of sheet metal parts through the dust hood 8 and facilitates grinding by the chamfering grinding head 32. Insertion plates 82 are symmetrically provided on both sides of the bottom of the dust hood 8. The insertion plates 82 insert into the inner side of the insertion slot 22 to facilitate the connection between the dust hood 8 and the slider 2. A connecting pipe 83 is provided on the side of the dust hood 8, and an adapter cap 84 is provided on the bottom of the connecting pipe 83. The adapter cap 84 connects to the dust collection pipe 16, facilitating the assembly and disassembly of the dust hood 8 from the body 1. The dust collection assembly 9 includes a fan 91 and a filter cartridge 92. The suction end of the fan 91 is provided with an intake pipe 911, and the end of the intake pipe 911 is provided with a second connecting cap 912. The filter cartridge 92 is installed between the dust collection pipe 16 and the intake pipe 911. This structure facilitates the installation of the filter cartridge 92 between the dust collection pipe 16 and the intake pipe 911, allowing the filter cartridge 92 to filter airborne debris. In addition, multiple filter plates with different apertures are provided inside the filter cartridge 92 to facilitate filtering of debris of different particles. External tubes 921 are provided at both ends of the filter cartridge 92, and the two external tubes 921 are respectively connected to the suction pipe 911 and the dust suction pipe 16; an exhaust pipe 913 is provided at the exhaust end of the fan 91, and a fixed foot 914 is provided at the bottom end of the fan 91. Multiple fixing holes 915 are provided on both sides of the fixed foot 914. The fixed foot 914 and the fixing holes 915 are convenient for fixing the position of the fan 91 to ensure the stable use of the fan 91. The fan 91 and the grinding motor 31 are both electrically connected to the body 1. Example

[0031] like Figure 1 、 Figure 3 and Figure 5As shown, a sheet metal chamfering and grinding device includes a body 1, a slider 2 is provided on the top of the body 1, the slider 2 can move back and forth on the top of the body 1, a grinding assembly 3 is provided on the slider 2, the output end of the grinding assembly 3 protrudes from the top of the slider 2, and the grinding assembly 3 is used to chamfer and grind the edge of the sheet metal; the grinding assembly 3 includes a grinding motor 31 and a chamfering grinding head 32, and the chamfering grinding head 32 is installed at the output end of the grinding motor 31; this structure facilitates the slider 2 to drive the grinding assembly 3 to press against the sheet metal, thereby facilitating and stably chamfering the edge of the sheet metal. A dust hood 8 is provided above the slider 2, and the dust hood 8 is connected to the dust suction pipe 16 in the inner cavity of the body 1, and the dust suction pipe 16 is connected to the dust suction assembly 9, and the dust suction assembly 9 is used to absorb and filter the debris generated by grinding; the dust hood 8 cooperates with the dust suction assembly 9 to facilitate the absorption of the debris generated by grinding to prevent the debris from splashing. A guide seat 5 is provided on the side of the top of the body 1 opposite to the slider 2, and a driving screw 4 is provided on the top of the body 1. The driving screw 4 is threadedly connected to the guide seat 5, and a driving seat 6 is provided above the guide seat 5. The driving seat 6 is electrically connected to the body 1, and a clamping screw 7 is rotatably connected to the top of the driving seat 6. The clamping screw 7 is threadedly connected to the guide seat 5, which is used to drive the driving seat 6 to move up and down, so that the gap between the driving seat 6 and the guide seat 5 can be adjusted according to the thickness of the sheet metal. This structure makes it convenient for the guide seat 5 to cooperate with the driving seat 6 to clamp and drive the sheet metal that needs to be chamfered, facilitates the movement and chamfering of the sheet metal, and facilitates the processing of the sheet metal.

[0032] like Figure 2 and Figure 3 As shown, a control panel 11 is provided on the front of the body 1, and the control panel 11 is used to facilitate the operation of the entire device. Support feet 12 are provided at the corners of the bottom surface of the body 1, and the support feet 12 are used to facilitate the stable placement and use of the body 1. A guide groove 13 is provided on one side of the top of the body 1, and a first bearing 14 is provided at both ends of the guide groove 13. The cooperation between the guide groove 13 and the first bearing 14 is convenient for installing the drive screw 4, and convenient for the rotation and use of the drive screw 4. A guide opening 15 is provided on the side of the top of the body 1 opposite to the guide groove 13; the guide opening 15 is convenient for installing the slider 2, and convenient for the movement of the slider 2. The dust suction pipe 16 protrudes from the top of the body 1, which is convenient for the dust suction pipe 16 to be connected to the dust suction hood 8. A first connecting cap 161 is provided at the bottom end of the dust suction pipe 16; the first connecting cap 161 is convenient for the dust suction pipe 16 to be connected to the dust suction assembly 9. A connection wire 17 is provided on the side of the machine body 1 , and a power plug 171 is provided at the end of the connection wire 17 . The connection wire 17 and the power plug 171 are convenient for connecting the machine body 1 to electricity, and facilitate the operation and use of the machine body 1 .

[0033] like Figure 4As shown, a second bearing 21 is provided in the middle of the slider 2, and the second bearing 21 is convenient for rotationally connecting with the output end of the grinding motor 31. Snap-ons 23 are symmetrically provided on both sides of the slider 2, and the slider 2 is engaged with the inner side of the guide opening 15, so that the slider 2 can move along the guide opening 15. Mounting grooves 24 are provided at the top and bottom of the inner side of the snap-on 23, and a plurality of rollers 25 are evenly provided inside the mounting grooves 24 to reduce the friction between the slider 2 and the body 1. Plug-in grooves 22 are symmetrically provided on both sides of the slider 2, and the plug-in grooves 22 are convenient for installing the dust hood 8, and are convenient for disassembly and use of the dust hood 8. A top screw 26 is provided on the side of the slider 2 aligned with the plug-in groove 22; the top screw 26 is a position for fixing the dust hood 8. A plurality of pressure springs 27 are provided on the side of the slider 2 away from the guide seat 5, and the pressure springs 27 are convenient for making the grinding assembly 3 stable against the edge of the sheet metal. A telescopic guide rod 28 is provided inside the pressure spring 27, and a mounting plate 29 is provided at the end of the telescopic guide rod 28. Mounting holes 291 are provided on both sides of the mounting plate 29. The mounting plate 29 is fixed to the body 1 by bolts passing through the mounting holes 291. The cooperation between the telescopic guide rod 28 and the mounting plate 29 is convenient and stable for guiding the spring, and facilitates the stable extension and contraction of the spring.

[0034] like Figure 5 As shown, the top of the grinding motor 31 is provided with a connecting plate 313, which is provided with a connecting hole 314. The connection plate 313 and the connecting hole 314 cooperate to facilitate the installation of the grinding motor 31. The grinding motor 31 is fixed to the bottom surface of the slider 2 by bolts passing through the connecting hole 314. The output end of the grinding motor 31 is provided with a drive shaft 311, the top end of which protrudes from the slider 2. The drive shaft 311 is used to conveniently drive the chamfering grinding head 32 to rotate. The middle of the drive shaft 311 is provided with a plug-in post 312, which facilitates the assembly and disassembly of the chamfering grinding head 32 and facilitates its use. A sleeve joint 321 is provided at the bottom end of the chamfer grinding head 32, a sleeve groove 322 is provided in the middle of the sleeve joint 321, the sleeve groove 322 is sleeved on the plug-in column 312, and a clamping bolt 323 is provided on the side of the sleeve joint 321. The clamping bolt 323 is convenient for fixing the chamfer grinding head 32 and facilitating the disassembly and replacement of the chamfer grinding head 32.

[0035] like Figure 6 As shown, both ends of the drive screw 4 are provided with an adapter portion 41, which is interference-connected with the first bearing 14 to facilitate the rotation of the drive screw 4. One end of the drive screw 4 protrudes from the body 1, and a first rotating handle 42 is provided at the end of the drive screw 4 protruding from the body 1. A crank 43 is provided on the edge of the first rotating handle 42. The first rotating handle 42 cooperates with the crank 43 to facilitate the rotation of the drive screw 4, thereby facilitating the rotation and use of the drive screw 4.

[0036] like Figure 7 、 Figure 6 and Figure 9As shown, the guide seat 5 is evenly provided with multiple fixed grooves 51, and each fixed groove 51 is provided with a guide roller 52. The fixed grooves 51 cooperate with the guide rollers 52 to facilitate guiding the sheet metal parts and reduce the friction between the sheet metal parts and the guide seat 5. Guide rods 53 are symmetrically provided on both sides of the side of the guide seat 5 away from the slider 2; the guide rods 53 facilitate cooperation with the drive seat 6, facilitating the stable up and down movement of the drive seat 6. A support rod 54 is provided between the two guide rods 53. The support rod 54 is L-shaped, and a first threaded hole 55 is provided at the top of the support rod 54; the first threaded hole 55 facilitates the connection between the support rod 54 and the clamping screw 7. A connecting block 56 is provided at the bottom end of the guide seat 5, and a second threaded hole 57 is provided in the middle of the connecting block 56. The connecting block 56 is inserted into the guide groove 13, and the second threaded hole 57 is connected to the drive screw 4; the rotation of the drive screw 4 facilitates the position adjustment of the guide seat 5 and the drive seat 6. A guide roller 52 is also provided at the position where the bottom surface of the drive seat 6 is aligned with the guide roller 52, and one of the guide rollers 52 on the drive seat 6 is connected to a drive motor 61, which facilitates the drive motor 61 to drive the guide roller 52 to rotate, so that the rotating guide roller 52 drives the sheet metal to move. A sleeve frame 62 is provided at the position where the drive seat 6 is aligned with the guide rod 53, and a sleeve hole 63 is provided in the middle of the sleeve frame 62. The sleeve hole 63 is sleeved on the guide rod 53, which facilitates the drive seat 6 to be stably used with the guide seat 5. A spring wire 64 is provided on the side of the drive motor 61, and a connecting plug 65 is provided at the bottom end of the spring wire 64. The connecting plug 65 is plugged into the body 1; it is convenient for the body 1 to control the operation and use of the drive motor 61. An adapter 66 is provided on the upper surface of the drive seat 6, and a third bearing 67 is provided in the middle of the adapter 66. The third bearing 67 is convenient for the drive seat 6 to be connected to the clamping screw 7. The compression screw 7 is connected to the first threaded hole 55. A second rotating handle 71 is provided on the top of the compression screw 7. The second rotating handle 71 facilitates the rotation of the compression screw 7, so that the compression screw 7 can drive the driving seat 6 to move up and down. A connecting shaft 72 is provided at the bottom of the compression screw 7. The connecting shaft 72 is interference-connected with the third bearing 67.

[0037] like Figure 10 and Figure 11As shown, the dust hood 8 is provided with a feed port 81 facing the guide seat 5. This port 81 facilitates the passage of sheet metal parts through the dust hood 8 and facilitates grinding by the chamfering grinding head 32. Insertion plates 82 are symmetrically provided on both sides of the bottom of the dust hood 8. The insertion plates 82 insert into the inner side of the insertion slot 22 to facilitate the connection between the dust hood 8 and the slider 2. A connecting pipe 83 is provided on the side of the dust hood 8, and an adapter cap 84 is provided on the bottom of the connecting pipe 83. The adapter cap 84 connects to the dust collection pipe 16, facilitating the assembly and disassembly of the dust hood 8 from the body 1. The dust collection assembly 9 includes a fan 91 and a filter cartridge 92. The suction end of the fan 91 is provided with an intake pipe 911, and the end of the intake pipe 911 is provided with a second connecting cap 912. The filter cartridge 92 is installed between the dust collection pipe 16 and the intake pipe 911. This structure facilitates the installation of the filter cartridge 92 between the dust collection pipe 16 and the intake pipe 911, allowing the filter cartridge 92 to filter airborne debris. In addition, multiple filter plates with different apertures are provided inside the filter cartridge 92 to facilitate filtering of debris of different particles. External tubes 921 are provided at both ends of the filter cartridge 92, and the two external tubes 921 are respectively connected to the suction pipe 911 and the dust suction pipe 16; an exhaust pipe 913 is provided at the exhaust end of the fan 91, and a fixed foot 914 is provided at the bottom end of the fan 91. Multiple fixing holes 915 are provided on both sides of the fixed foot 914. The fixed foot 914 and the fixing holes 915 are convenient for fixing the position of the fan 91 to ensure the stable use of the fan 91. The fan 91 and the grinding motor 31 are both electrically connected to the body 1.

[0038] like Figure 1 、 Figure 3 and Figure 12 As shown, it also includes an inspection cover 10. An inspection port 18 is provided on the back of the body 1. The top and bottom of the inspection port 18 are provided with a card slot 181. The inspection port 18 cooperates with the card slot 181 to facilitate the disassembly and assembly of the inspection cover 10 and the use of the inspection cover 10. The inspection cover 10 is provided with a plurality of heat dissipation holes 101. The heat dissipation holes 101 are convenient for discharging the heat generated by the body 1 and for exhausting the air from the fan 91. The top and bottom of the inspection cover 10 are provided with a card edge 103. The card edge 103 is engaged in the card slot 181 to facilitate the stable installation of the inspection cover 10. The outer side of the inspection cover 10 is provided with a pull groove 102. The pull groove 102 is convenient for pulling the inspection cover 10 and for disassembly and assembly of the inspection cover 10.

[0039] Working principle: When in use, start the device through the control panel 11. First, according to the thickness of the sheet metal, turn the second rotating handle 71 to make the clamping screw 7 drive the drive seat 6 to move up and down along the guide rod 53, adjust the gap between the drive seat 6 and the guide seat 5, and place the sheet metal on the guide roller 52 between the two. The guide roller 52 guides the sheet metal. At the same time, the drive motor 61 drives one of the guide rollers 52 to rotate, thereby driving the sheet metal to move; the slider 2 drives the grinding assembly 3 (the grinding motor 31 drives the chamfering grinding head 32 to rotate) under the action of the pressure spring 27 to stably rest against the edge of the sheet metal, and the slider 2 can move along the guide mouth 15 to ensure that the grinding head always presses the sheet metal. , to achieve chamfering and grinding of the edges of the moving sheet metal parts; during the grinding process, the fan 91 of the dust collection component 9 works, and the dust collection cover 8 (the sheet metal parts pass through the feeding port 81) absorbs the debris generated by grinding, and the debris enters the filter cartridge 92 through the dust collection pipe 16. The multiple groups of filter plates with different apertures in the filter cartridge 92 filter the debris, and the filtered air is discharged from the exhaust pipe 913 through the fan 91 to avoid the debris from splashing; at the same time, the body 1 is powered by the connecting wire 17 and the power plug 171, the support feet 12 ensure that the body 1 is placed stably, and the heat dissipation holes 101 on the inspection cover 10 help the body 1 to dissipate heat. The overall operation is uniformly controlled by the control panel 11 to complete the chamfering and grinding operation of the sheet metal parts. Example

[0040] like Figure 13 As shown, a sheet metal chamfer grinding method, the specific steps of the grinding method are as follows: S100, selecting a suitable chamfering grinding head 32 according to the chamfering requirements, then installing the chamfering grinding head 32 at the output end of the grinding motor 31, and then installing and fixing the dust cover 8; S200, adjusting the gap between the guide seat 5 and the drive seat 6 using the compression screw 7 according to the thickness of the sheet metal part, so that the sheet metal part can move under the drive seat 6; S300, adjusting the distance between the guide seat 5 and the slider 2 according to the width of the sheet metal part to ensure that the edge of the sheet metal part can rest on the chamfering grinding head 32; S400, start the entire equipment, and then insert the sheet metal plate to be polished into the gap between the guide seat 5 and the drive seat 6. Driven by the drive seat 6, the edge of the sheet metal is slowly passed through the chamfering and polishing joint to achieve chamfering processing on the sheet metal; in the process of polishing the sheet metal, the end of the sheet metal that needs to be chamfered is against the chamfering and polishing joint. Since the slider 2 is provided with a pressure spring 27, the elastic force provided by the pressure spring 27 will make the chamfering and polishing head 32 stably pressed on the sheet metal, thereby achieving stable and uniform polishing of the sheet metal.

[0041] S500: debris generated during the chamfering process will be sucked away by the dust collection component 9, which will filter the sucked away debris and discharge clean air; S600: After the sheet metal processing is completed, open the machine body 1 and clean the dust collection component 9.

[0042] To sum up, compared with the prior art, the present application facilitates the grinding of the edges of sheet metal parts by installing a grinding motor 31 and a chamfering grinding head 32 on the slider 2, and the chamfering grinding head 32 can be replaced according to usage requirements, which makes it convenient to replace the appropriate chamfering grinding head 32 according to the chamfering requirements. A dust hood 8 is provided above the grinding head, and the dust hood 8 cooperates with the suction component to absorb the debris generated by grinding to avoid the debris from splashing, which greatly facilitates the processing of the debris generated by grinding.

[0043] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A sheet metal chamfering and grinding device, comprising a body (1), characterized in that: A slider (2) is provided on the top of the machine body (1), and the slider (2) can move back and forth on the top of the machine body (1). A grinding assembly (3) is provided on the slider (2), and the output end of the grinding assembly (3) protrudes from the top of the slider (2); the grinding assembly (3) includes a grinding motor (31) and a chamfering grinding head (32), and the chamfering grinding head (32) is installed at the output end of the grinding motor (31); a dust hood (8) is provided above the slider (2), and the dust hood (8) is connected to a dust suction pipe (16) in the inner cavity of the machine body (1), and the dust suction pipe (16) is connected to the dust suction assembly (9 A guide seat (5) is provided on the top of the body (1) on the side opposite to the slider (2), a driving screw (4) is provided on the top of the body (1), the driving screw (4) is threadedly connected to the guide seat (5), and a driving seat (6) is provided above the guide seat (5), the driving seat (6) is electrically connected to the body (1), and a clamping screw (7) is rotatably connected to the top of the driving seat (6), the clamping screw (7) is threadedly connected to the guide seat (5), and is used to drive the driving seat (6) to move up and down, so as to adjust the gap between the driving seat (6) and the guide seat (5) according to the thickness of the sheet metal.

2. A sheet metal chamfering and grinding device according to claim 1, characterized in that: The front of the machine body (1) is provided with a control panel (11), the bottom corners of the machine body (1) are provided with supporting feet (12), one side of the top of the machine body (1) is provided with a guide groove (13), both ends of the guide groove (13) are provided with a first bearing (14), and a guide opening (15) is provided on the side of the top of the machine body (1) opposite to the guide groove (13); the dust suction pipe (16) protrudes from the top of the machine body (1), and the bottom end of the dust suction pipe (16) is provided with a first connecting cap (161); the side of the machine body (1) is provided with a connecting wire (17), and the end of the connecting wire (17) is provided with an electric plug (171).

3. The sheet metal chamfering and grinding device according to claim 2, characterized in that: A second bearing (21) is provided in the middle of the slider (2), and bayonet holes (23) are symmetrically provided on both sides of the slider (2). The slider (2) is engaged with the inner side of the guide opening (15), and mounting grooves (24) are provided at the top and bottom of the inner side of the bayonet hole (23). A plurality of rollers (25) are evenly provided inside the mounting grooves (24). Plug-in grooves (22) are symmetrically provided on both sides of the slider (2), and a top screw (26) is provided on the side of the slider (2) aligned with the plug-in grooves (22); a plurality of pressure springs (27) are provided on the side of the slider (2) away from the guide seat (5), and a telescopic guide rod (28) is provided inside the pressure spring (27). A mounting plate (29) is provided at the end of the telescopic guide rod (28), and mounting holes (291) are provided on both sides of the mounting plate (29). The mounting plate (29) is fixed to the body (1) by bolts passing through the mounting holes (291).

4. The sheet metal chamfering and grinding device according to claim 1, characterized in that: The top of the grinding motor (31) is provided with a connecting plate (313), and the connecting plate (313) is provided with a connecting hole (314). The grinding motor (31) is fixed to the bottom surface of the slider (2) by means of bolts passing through the connecting hole (314). The output end of the grinding motor (31) is provided with a transmission shaft (311), the top end of the transmission shaft (311) protrudes out of the slider (2), and the middle part of the transmission shaft (311) is provided with a plug-in column (312). The bottom end of the chamfering grinding head (32) is provided with a sleeve joint (321), the middle part of the sleeve joint (321) is provided with a sleeve groove (322), the sleeve groove (322) is sleeved on the sleeve joint (312), and the side of the sleeve joint (321) is provided with a clamping bolt (323).

5. The sheet metal chamfering and grinding device according to claim 2, characterized in that: Both ends of the driving screw rod (4) are provided with a connecting portion (41), the connecting portion (41) is interference-connected with the first bearing (14), and one end of the driving screw rod (4) protrudes from the machine body (1), and the end of the driving screw rod (4) protruding from the machine body (1) is provided with a first rotating handle (42), and the edge of the first rotating handle (42) is provided with a crank handle (43).

6. The sheet metal chamfering and grinding device according to claim 2, characterized in that: The guide seat (5) is evenly provided with a plurality of fixing grooves (51), and the fixing grooves (51) are each provided with a guide roller (52). The guide seat (5) is symmetrically provided with guide rods (53) on both sides of the side away from the slider (2); and a support rod (54) is provided between the two guide rods (53), and the support rod (54) is L-shaped, and a first threaded hole (55) is provided on the top of the support rod (54); a connecting block (56) is provided at the bottom end of the guide seat (5), and a second threaded hole (57) is provided in the middle of the connecting block (56), and the connecting block (56) is inserted into the guide groove (13), and the second threaded hole (57) is connected to the driving screw (4); a guide roller (52) is also provided at the position where the bottom surface of the driving seat (6) is aligned with the guide roller (52), and one of the guide rollers (55) on the driving seat (6) is provided. 2) connected with a driving motor (61), the driving seat (6) is provided with a sleeve frame (62) at a position aligned with the guide plug rod (53), a sleeve hole (63) is provided in the middle of the sleeve frame (62), the sleeve hole (63) is sleeved on the guide plug rod (53), a spring line (64) is provided on the side of the driving motor (61), a connecting plug (65) is provided at the bottom end of the spring line (64), and the connecting plug (65) is plugged and connected to the body (1); an adapter (66) is provided on the upper surface of the driving seat (6), a third bearing (67) is provided in the middle of the adapter (66), the pressing screw (7) is connected to the first threaded hole (55), a second rotating handle (71) is provided on the top of the pressing screw (7), a connecting shaft (72) is provided at the bottom end of the pressing screw (7), and the connecting shaft (72) is interference-connected with the third bearing (67).

7. The sheet metal chamfering and grinding device according to claim 3, characterized in that: The dust hood (8) is provided with a feeding port (81) in the direction of the guide seat (5), and plug plates (82) are symmetrically provided on both sides of the bottom of the dust hood (8), and the plug plates (82) are inserted into the inner side of the plug slot (22). A connecting pipe (83) is provided on the side of the dust hood (8), and a transfer cap (84) is provided on the bottom of the connecting pipe (83), and the transfer cap (84) is connected to the dust collection pipe (16); the dust collection assembly (9) includes a fan (91) and a filter cartridge (92), and the fan (91) is provided with a suction pipe (911) at the suction end, and a second connecting cap is provided at the end of the suction pipe (911). (912), the filter cartridge (92) is installed between the dust suction pipe (16) and the air intake pipe (911), and a plurality of filter plates with different apertures are provided inside the filter cartridge (92) to facilitate filtering of debris of different particles. Both ends of the filter cartridge (92) are provided with external pipes (921), and the two external pipes (921) are respectively connected to the air intake pipe (911) and the dust suction pipe (16); the exhaust end of the fan (91) is provided with an exhaust pipe (913), and the bottom end of the fan (91) is provided with a fixed foot (914), and the two sides of the fixed foot (914) are provided with a plurality of fixing holes (915).

8. A sheet metal chamfering and grinding device according to any one of claims 1 to 7, characterized in that: The machine body (1) further comprises an inspection cover (10), wherein an inspection port (18) is provided on the back of the machine body (1), and the top and bottom of the inspection port (18) are both provided with card slots (181), the inspection cover (10) is provided with a plurality of heat dissipation holes (101), and the top and bottom of the inspection cover (10) are both provided with card edges (103), the card edges (103) are engaged in the card slots (181), and the outer side of the inspection cover (10) is provided with a pull groove (102).

9. A method for chamfering and grinding a sheet metal part, using the sheet metal chamfering and grinding device according to any one of claims 1 to 8, characterized in that: The specific steps of this polishing method are as follows: S100, selecting a suitable chamfering grinding head (32) according to the chamfering requirements, then installing the chamfering grinding head (32) at the output end of the grinding motor (31), and then installing and fixing the dust cover (8); S200, adjusting the gap between the guide seat (5) and the drive seat (6) using the compression screw (7) according to the thickness of the sheet metal part, so that the sheet metal part can be moved under the drive of the drive seat (6); S300, adjusting the distance between the guide seat (5) and the slider (2) according to the width of the sheet metal part to ensure that the edge of the sheet metal part can be against the chamfering grinding head (32); S400, start the entire device, then insert the sheet metal plate to be polished into the gap between the guide seat (5) and the drive seat (6), and drive the drive seat (6) to slowly pass the edge of the sheet metal plate in accordance with the chamfering and polishing joint, thereby achieving chamfering processing on the sheet metal plate; S500, debris generated during the chamfering process will be sucked away by the dust collection component (9), and the dust collection component (9) will filter the sucked away debris and discharge clean air; S600: After the sheet metal parts are processed, the machine body (1) is opened and the dust collection assembly (9) is cleaned.

10. A sheet metal chamfering and grinding method according to claim 9, characterized in that: In step S400, during the process of grinding the sheet metal part, the end of the sheet metal part that needs to be chamfered is placed against the chamfer grinding joint. Since the slider (2) is provided with a pressure spring (27), the elastic force provided by the pressure spring (27) causes the chamfer grinding head (32) to be stably pressed against the sheet metal part, thereby achieving stable and uniform grinding of the sheet metal part.

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