A multi-point clamp based on mechanical processing and clamping operation method

Abstract

The present invention provides a multi-point clamp based on mechanical processing and a clamping operation method, which relates to the field of mechanical processing technology and solves the problem that the current clamp has inconveniences when fixing pipes of different specifications, and there is a lack of a buffer mechanism between the pressure plate and the pipe fitting, and the pressure plate and the pipe fitting are in direct contact, which easily leaves marks on the surface of the pipe fitting, or knocks off the protective layer on the surface of the pipe fitting. A multi-point clamp based on mechanical processing and a clamping operation method, including a fixing box; the interior of the fixing box is a hollow structure, the lower end face of the fixing box is provided with an opening, and the upper end face of the fixing box is fixedly installed with an electric cylinder. In the present invention, rubber strips are evenly installed on the inner end faces of the fixed clamps, so that when the two fixed clamps are fixing the workpiece, the rubber strips can play a buffering role to prevent the fixed clamps from knocking off the protective layer on the surface of the workpiece when the workpiece is pressed tightly.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a multi-point clamper and a clamping operation method based on mechanical processing. Background Art

[0002] A clamp is a device for holding an object and manipulating the object. It can clamp and release the object while performing certain actions. Existing clamps still have some shortcomings when clamping and fixing pipe fittings.

[0003] With reference to the patent application number CN201911122739.9, a clamp is disclosed which clamps the pipe at multiple points by means of multiple groups of clamping arms distributed along the axis of the pipe, and supports the pipe by means of balls on the clamping arms, which can effectively improve the clamping and positioning effect of the pipe. The invention is characterized in that a plurality of mounting grooves are equidistantly provided on the inner wall of the outer fixing sleeve and are distributed in an annular shape, the guide bar is placed in the mounting groove, the two sides of the guide bar are respectively provided with card grooves, the card groove walls are provided with rubber protrusions, the card grooves extend from one end of the guide bar to the other end, the main clamping arm is placed in the outer fixing sleeve, one end of the main clamping arm is provided with a limiting flange, and the limiting flange is clamped in the card groove on the guide bar, the angle between the limiting flange and the main clamping arm is an acute angle, the auxiliary clamping arm is placed in the outer fixing sleeve, and one end is hinged to the other end of the auxiliary clamping arm through a hinge shaft, the other end of the auxiliary clamping arm is provided with a limiting flange, and the limiting flange is clamped in the card groove on the guide bar.

[0004] Based on the search of the above patents, it is found that the current clamp has the following shortcomings:

[0005] First, the pipe fittings in the above patents are fixed in the external fixing sleeve, so the specifications and sizes of the pipe fittings to be processed are limited by the external fixing sleeve, that is, pipe fittings of different specifications cannot be fixed, which reduces the practicality;

[0006] Second, when the above patents fix the pipe fittings, there is no buffer mechanism between the pressing plate and the pipe fittings, and the pressing plate and the pipe fittings are in direct contact, which is easy to leave marks on the surface of the pipe fittings, or knock off the protective layer on the surface of the pipe fittings;

[0007] Third, the above patents can only fix pipe fittings horizontally, but not vertically, which is inconvenient in actual processing. Summary of the invention

[0008] The purpose of the present invention is to solve the above problems. The present invention provides a multi-point clamp based on mechanical processing and a clamping operation method, which solves the inconvenience of the current clamp when fixing pipe fittings of different specifications, as well as the lack of a buffer mechanism between the pressure plate and the pipe fitting. The pressure plate and the pipe fitting are in direct contact, which easily leaves marks on the surface of the pipe fitting or knocks off the protective layer on the surface of the pipe fitting.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-point clamp based on mechanical processing and a clamping operation method, comprising a fixing box;

[0010] The interior of the fixing box is a hollow structure, the lower end surface of the fixing box is provided with an opening, and the upper end surface of the fixing box is fixedly mounted with an electric cylinder;

[0011] A first fixed shaft, the first fixed shaft is fixedly installed at the middle position of the lower end surface of the fixed box, and the outer part of the first fixed shaft is sleeved with two sleeves;

[0012] The sliding frame is a U-shaped structure, the two end surfaces of the sliding frame are in contact with the side walls of the internal cavity of the fixed box, and the telescopic part of the electric cylinder is fixedly connected to the middle position of the upper end surface of the sliding frame;

[0013] A first power arm, wherein the first power arm is symmetrically provided with two groups, and the upper end of the first power arm is rotatably connected to the outer end surface of the first fixed shaft, and the surface of the first power arm has a track groove;

[0014] A second power arm, wherein the second power arm is symmetrically provided with two groups, and the upper end surface of the second power arm is fixedly connected to the first fixed shaft, and the surface of the second power arm is also provided with a track groove;

[0015] The clamping plates are four in total, the upper ends of the two clamping plates on the left are respectively fixedly connected to the second power arms, and the upper ends of the two clamping plates on the right are respectively fixedly connected to the two first power arms.

[0016] Furthermore, a fixed stopper is installed inside the fixed box, and the fixed stopper is located 2 cm above the first fixed axis. Two connecting plates are installed at both ends of the fixed box respectively. The connecting plate body is a semicircular structure, and a threaded hole is opened in the middle of the connecting plate.

[0017] Furthermore, two second fixed shafts are respectively installed on the front and rear end surfaces of the vertical plates at both ends of the sliding frame. The second fixed shaft on the left is slidably mounted in the track groove on the surface of the second power arm, and the second fixed shaft on the right is slidably mounted in the track groove on the surface of the first power arm.

[0018] Furthermore, two limit plates are installed on the surface of the second fixed shaft, the two limit plates on the left surface of the second fixed shaft are located at both ends of the second power arm, and the two limit plates on the right surface of the second fixed shaft are located at both ends of the first power arm.

[0019] Furthermore, a groove is provided in the middle of the outer end surface of the clamping plate, the lower end surface of the clamping plate is an arc-shaped structure, the middle position of the clamping plate is a circular plate-shaped structure, and four through holes are provided in a ring-shaped surface on the surface of the circular plate in the middle of the clamping plate.

[0020] Furthermore, it also includes a fixed clamp block, the outer end surface of which is equipped with two fastening screws, the fastening screws pass through the through holes on the surface of the clamp plate and are fastened by nuts, and the inner end surface of the fixed clamp block is an arc-shaped structure.

[0021] Furthermore, rubber strips are evenly installed on the inner end surface of the fixed clamp block, and the surface of the rubber strips is provided with trapezoidal notches.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In the present invention, threaded holes are provided on the surfaces of the connecting plates at both ends of the fixing box, so as to facilitate fixing the fixing box at a designated location. Meanwhile, a fixed stopper is installed inside the fixing box. When the top plate of the sliding frame touches the fixed stopper, the sliding frame stops moving forward, thereby preventing the sliding frame from touching the first fixed shaft and causing damage to the first fixed shaft.

[0024] In addition, the second fixed shaft at the lower end of the sliding frame is slidably mounted in the track groove on the surface of the first power arm and the second power arm, so that when the sliding frame moves downward, the second fixed shaft at the lower end of the sliding frame will drive the first power arm and the second power arm to move inward at the same time, and at this time the two clamps will also move inward at the same time, so that workpieces of different sizes can be clamped.

[0025] In addition, the inner end surface of the limiting plate on the surface of the second fixed shaft fits with the front and rear end surfaces of the second power arm, so that when the second fixed shaft moves up and down along the track groove on the surface of the second power arm, the second power arm will not swing left and right.

[0026] In addition, four through holes are opened in a ring shape on the surface of the circular plate in the middle of the clamp. When the two fastening screws on the outer end face of the fixed clamp block pass through the upper and lower through holes, the fixed clamp block is in a vertical state. At this time, the fixed clamp block can clamp and fix the horizontal pipe. If the vertical pipe needs to be clamped, the two fastening screws can be passed through the front and rear through holes. In this way, the fixed clamp block is in a horizontal state and can fix the vertical pipe, thereby increasing the practicality of the device.

[0027] In addition, rubber strips are evenly installed on the inner end faces of the fixed clamps, so that when the two fixed clamps are fixing the workpiece, the rubber strips can play a buffering role to prevent the paint on the surface of the workpiece from being knocked off when the fixed clamps are pressing the workpiece. A triangular notch is provided on the inner end face of the rubber strip, so that when the rubber strip contacts the workpiece, the friction between the rubber strip and the workpiece can be increased to prevent the workpiece from shaking left and right.

[0028] In addition, the arc groove on the surface of the fixing clamp block can be designed to have different curvatures, so that when fixing a larger pipe fitting, the fixing clamp block with a larger curvature can be replaced, making it easier for the device to fix pipe fittings of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention;

[0030] Figure 2 It is a schematic diagram of the exploded structure of the overall device of the present invention;

[0031] Figure 3 It is a schematic diagram of the connection structure between the fixed clamp block and the clamp plate of the present invention;

[0032] Figure 4 For the present invention Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0033] Figure 5 It is a front view structural diagram of the internal device of the fixing box of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the fixed box and the sliding frame of the present invention;

[0035] Figure 7 It is a schematic structural diagram of the first power arm, the second power arm and the first fixed shaft of the present invention;

[0036] Figure 8 It is a schematic structural diagram of the first power arm and the clamping plate of the present invention.

[0037] In the figure:

[0038] 1. Fixed box; 101. Connecting plate; 102. Fixed block; 2. Electric cylinder; 3. First fixed axis; 301. Sleeve; 4. Sliding frame; 401. Second fixed axis; 4011. Limiting plate; 5. First power arm; 6. Second power arm; 7. Clamp; 701. Through hole; 8. Fixed clamp; 801. Rubber strip; 802. Fastening screw. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example

[0041] like Figures 1 to 8 As shown, the present invention provides a multi-point clamp based on mechanical processing and a clamping operation method, comprising a fixing box 1;

[0042] The interior of the fixing box 1 is a hollow structure, the lower end surface of the fixing box 1 is provided with an opening, and the upper end surface of the fixing box 1 is fixedly mounted with an electric cylinder 2;

[0043] A first fixed shaft 3, which is fixedly mounted at the middle position of the lower end surface of the fixed box 1, and two sleeves 301 are sleeved on the outside of the first fixed shaft 3;

[0044] The sliding frame 4 is a U-shaped structure, the two end surfaces of the sliding frame 4 are in contact with the side walls of the inner cavity of the fixed box 1, and the telescopic part of the electric cylinder 2 is fixedly connected to the middle position of the upper end surface of the sliding frame 4;

[0045] The first power arm 5 is symmetrically provided with two groups, and the upper end of the first power arm 5 is rotatably connected to the outer end surface of the first fixed shaft 3, and the surface of the first power arm 5 has a track groove;

[0046] The second power arm 6 is symmetrically provided with two groups, and the upper end surface of the second power arm 6 is fixedly connected to the first fixed shaft 3, and the surface of the second power arm 6 is also provided with a track groove;

[0047] There are four clamping plates 7 in total, the upper ends of the two clamping plates 7 on the left are fixedly connected to the second power arms 6 respectively, and the upper ends of the two clamping plates 7 on the right are fixedly connected to the two first power arms 5 respectively.

[0048] Among them, a fixed stopper 102 is installed inside the fixed box 1, and the fixed stopper 102 is located 2 cm above the first fixed axis 3. Two connecting plates 101 are installed at both ends of the fixed box 1. The main body of the connecting plate 101 is a semicircular structure, and a threaded hole is opened in the middle position of the connecting plate 101.

[0049] By adopting the above scheme, the technical effect brought about is: threaded holes are provided on the surfaces of the connecting plates 101 at both ends of the fixing box 1, so that when workers use the device, they can pass the fixing nails through the threaded holes on the surfaces of the connecting plates 101 to fix the fixing box 1 at a designated location, which is convenient for workers to fix the fixing box 1. At the same time, a fixed stopper 102 is also installed inside the fixing box 1. When the telescopic part of the electric cylinder 2 drives the sliding frame 4 to move forward, the fixed stopper 102 can play a limiting role. When the top plate of the sliding frame 4 touches the fixed stopper 102, the sliding frame 4 will stop moving forward, which can avoid the sliding frame 4 touching the first fixed shaft 3 and causing damage to the first fixed shaft 3.

[0050] Among them, two second fixed shafts 401 are respectively installed on the front and rear end faces of the vertical plates at both ends of the sliding frame 4. The second fixed shaft 401 on the left is slidably mounted in the track groove on the surface of the second power arm 6, and the second fixed shaft 401 on the right is slidably mounted in the track groove on the surface of the first power arm 5.

[0051] By adopting the above solution, the technical effect brought about is: when the sliding frame 4 moves downward, the second fixed shaft 401 at the lower end of the sliding frame 4 will drive the first power arm 5 and the second power arm 6 to move inward at the same time, and at this time the two clamps 7 will also move inward at the same time, thereby clamping the workpiece.

[0052] Among them, two limit plates 4011 are installed on the surface of the second fixed shaft 401. The two limit plates 4011 on the left surface of the second fixed shaft 401 are located at both ends of the second power arm 6, and the two limit plates 4011 on the right surface of the second fixed shaft 401 are located at both ends of the first power arm 5.

[0053] By adopting the above scheme, the technical effect brought about is: the inner end face of the limit plate 4011 on the surface of the left second fixed shaft 401 fits with the front and rear end faces of the second power arm 6, so that when the second fixed shaft 401 moves up and down along the track groove on the surface of the second power arm 6, the second power arm 6 will not swing left and right, so that when the two clamps 7 are fixing the workpiece, the clamps 7 can be perpendicular to the surface of the workpiece, thereby increasing the stability of the workpiece.

[0054] Among them, a groove is provided in the middle position of the outer end surface of the splint 7, the lower end surface of the splint 7 is an arc-shaped structure, the middle position of the splint 7 is a circular plate structure, and the surface of the circular plate in the middle of the splint 7 is annular with four through holes 701, and the outer end surface of the fixed clamp 8 is installed with two fastening screws 802, which pass through the through holes 701 on the surface of the splint 7 and are fastened by nuts. The inner end surface of the fixed clamp 8 is an arc-shaped structure, and the inner end surface of the fixed clamp 8 is evenly installed with rubber strips 801, and the surface of the rubber strips 801 is provided with trapezoidal notches.

[0055] By adopting the above scheme, the technical effect brought about is: the circular plate surface in the middle of the clamping plate 7 is annularly provided with four through holes 701, and when the two fastening screws 802 on the outer end surface of the fixing clamp block 8 pass through the upper and lower through holes 701, the fixing clamp block 8 is in a vertical state, at which time the fixing clamp block 8 can clamp and fix the horizontal pipe, and if it is necessary to clamp the vertical pipe, the two fastening screws 802 can be passed through the front and rear through holes 701, so that the fixing clamp block 8 is in a horizontal state, and the vertical pipe can be fixed, which can not only fix the pipes in different directions The pipe is fixed, and the disassembly and assembly of the fixing clamp block 8 is also very convenient, which can be convenient for workers to operate. At the same time, the inner end faces of the fixing clamp blocks 8 are evenly installed with rubber strips 801, so that when the two fixing clamp blocks 8 are fixing the workpiece, the rubber strips 801 can play a buffering role to prevent the paint on the surface of the workpiece from being knocked off when the fixing clamp blocks 8 are pressed against the workpiece. The inner end face of the rubber strip 801 is provided with a triangular notch, so that when the rubber strip 801 contacts the workpiece, the friction between the rubber strip 801 and the workpiece can be increased to prevent the workpiece from shaking left and right.

[0056] When in use: threaded holes are provided on the surfaces of the connecting plates 101 at both ends of the fixing box 1, so that when workers use the device, they can pass the fixing nails through the threaded holes on the surfaces of the connecting plates 101 to fix the fixing box 1 at a designated location, which is convenient for workers to fix the fixing box 1. At the same time, a fixed stopper 102 is also installed inside the fixing box 1. When the telescopic part of the electric cylinder 2 drives the sliding frame 4 to move forward, the fixed stopper 102 can play a limiting role. When the top plate of the sliding frame 4 touches the fixed stopper 102, the sliding frame 4 will stop moving forward, which can prevent the sliding frame 4 from touching the first fixed stopper. After the fixed axis 3 is fixed, the first fixed axis 3 is damaged. When the sliding frame 4 moves downward, the second fixed axis 401 at the lower end of the sliding frame 4 will drive the first power arm 5 and the second power arm 6 to move inward at the same time, and at this time, the two clamping plates 7 will also move inward at the same time, so as to clamp the workpiece. The inner end surface of the limit plate 4011 on the surface of the left second fixed axis 401 fits with the front and rear end surfaces of the second power arm 6, so that when the second fixed axis 401 moves up and down along the track groove on the surface of the second power arm 6, the second power arm 6 will not swing left and right, so that the two clamping plates 7 can clamp the workpiece. When fixing, the clamping plate 7 can be perpendicular to the surface of the workpiece to increase the stability of the workpiece. The circular plate surface in the middle of the clamping plate 7 is annularly provided with four through holes 701. When the two fastening screws 802 on the outer end surface of the fixing clamping block 8 pass through the upper and lower through holes 701, the fixing clamping block 8 is in a vertical state. At this time, the fixing clamping block 8 can clamp and fix the horizontal pipe. If it is necessary to clamp the vertical pipe, the two fastening screws 802 can be passed through the front and rear through holes 701. In this way, the fixing clamping block 8 is in a horizontal state, and the vertical pipe can be fixed, which can not only It can fix pipes in different directions, and the disassembly and assembly of the fixed clamp block 8 is also very convenient, which can be easy for workers to operate. At the same time, the inner end faces of the fixed clamp blocks 8 are evenly installed with rubber strips 801, so that when the two fixed clamp blocks 8 are fixing the workpiece, the rubber strips 801 can play a buffering role to prevent the paint on the surface of the workpiece from being knocked off when the fixed clamp blocks 8 are pressed against the workpiece. The inner end face of the rubber strip 801 is provided with a triangular notch, so that when the rubber strip 801 contacts the workpiece, the friction between the workpiece and the workpiece can be increased to prevent the workpiece from shaking left and right.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-point clamp based on machining, characterized in that: The multi-point clamp based on mechanical processing comprises a fixed box (1); the interior of the fixed box (1) is a hollow structure, the lower end surface of the fixed box (1) is provided with an opening, and the upper end surface of the fixed box (1) is fixedly mounted with an electric cylinder (2); a first fixed shaft (3), the first fixed shaft (3) is fixedly mounted at the middle position of the lower end surface of the fixed box (1), and the outer portion of the first fixed shaft (3) is sleeved with two sleeves (301); a sliding frame (4), the sliding frame (4) is a U-shaped structure, the two end surfaces of the sliding frame (4) are in contact with the side walls of the internal cavity of the fixed box (1), and the telescopic part of the electric cylinder (2) is fixedly connected to the middle position of the upper end surface of the sliding frame (4); A power arm (5), wherein the first power arm (5) is symmetrically provided with two groups, and the upper end of the first power arm (5) is rotatably connected to the outer end surface of the first fixed shaft (3), and the surface of the first power arm (5) has a track groove; a second power arm (6), wherein the second power arm (6) is symmetrically provided with two groups, and the upper end surface of the second power arm (6) is fixedly connected to the first fixed shaft (3), and the surface of the second power arm (6) is also provided with a track groove; a clamping plate (7), wherein a total of four clamping plates (7) are provided, and the upper ends of the two clamping plates (7) on the left side are respectively fixedly connected to the second power arm (6), and the upper ends of the two clamping plates (7) on the right side are respectively fixedly connected to the two first power arms (5); A fixed stopper (102) is installed inside the fixed box (1), and the fixed stopper (102) is located 2 cm above the first fixed axis (3). Two connecting plates (101) are installed at both ends of the fixed box (1), and the main body of the connecting plate (101) is a semicircular structure, and a threaded hole is opened in the middle of the connecting plate (101); Two second fixed shafts (401) are respectively installed on the front and rear end surfaces of the vertical plates at both ends of the sliding frame (4), the second fixed shaft (401) on the left side is slidably mounted in the track groove on the surface of the second power arm (6), and the second fixed shaft (401) on the right side is slidably mounted in the track groove on the surface of the first power arm (5); Two limit plates (4011) are installed on the surface of the second fixed shaft (401), the two limit plates (4011) on the surface of the left second fixed shaft (401) are located at two ends of the second power arm (6), and the two limit plates (4011) on the surface of the right second fixed shaft (401) are located at two ends of the first power arm (5); A groove is provided in the middle of the outer end surface of the clamping plate (7); the lower end surface of the clamping plate (7) is an arc-shaped structure; the middle of the clamping plate (7) is a circular plate-shaped structure; and four through holes (701) are provided in an annular shape on the surface of the circular plate in the middle of the clamping plate (7); It also includes a fixed clamp block (8), the outer end surface of the fixed clamp block (8) is equipped with two fastening screws (802), the fastening screws (802) pass through the through holes (701) on the surface of the clamp plate (7) and are fastened by nuts, and the inner end surface of the fixed clamp block (8) is an arc-shaped structure; The inner end surface of the fixed clamp block (8) is evenly mounted with a rubber strip (801), and the surface of the rubber strip (801) is provided with a trapezoidal notch; When in use: threaded holes are provided on the surfaces of the connecting plates (101) at both ends of the fixing box (1), so that when using the device, workers can pass fixing nails through the threaded holes on the surfaces of the connecting plates (101) to fix the fixing box (1) at a designated location, which is convenient for workers to fix the fixing box (1). At the same time, a fixed stopper (102) is installed inside the fixing box (1). When the telescopic part of the electric cylinder (2) drives the sliding frame (4) to move forward, the fixed stopper (102) can play a limiting role. When the top plate of the sliding frame (4) touches the fixed stopper (102), the sliding frame (4) stops moving forward, which can prevent the sliding frame (4) from touching After reaching the first fixed shaft (3), the first fixed shaft (3) is damaged. When the sliding frame (4) moves downward, the second fixed shaft (401) at the lower end of the sliding frame (4) drives the first power arm (5) and the second power arm (6) to move inward at the same time. At this time, the two clamping plates (7) also move inward at the same time, thereby clamping the workpiece. The inner end surface of the limit plate (4011) on the surface of the left second fixed shaft (401) fits with the front and rear end surfaces of the second power arm (6), so that when the second fixed shaft (401) moves up and down along the track groove on the surface of the second power arm (6), the second power arm (6) will not swing left and right, so that the two When the clamping plate (7) is used to fix the workpiece, the clamping plate (7) can be perpendicular to the surface of the workpiece to increase the stability of the workpiece. The circular plate surface in the middle of the clamping plate (7) is provided with four through holes (701) in a ring shape. When the two fastening screws (802) on the outer end surface of the fixed clamping block (8) pass through the upper and lower through holes (701), the fixed clamping block (8) is in a vertical state. At this time, the fixed clamping block (8) can clamp and fix the horizontal pipe. If it is necessary to clamp the vertical pipe, the two fastening screws (802) can be passed through the front and rear through holes (701). In this way, the fixed clamping block (8) is in a horizontal state and can fix the vertical pipe. The fixing can not only fix pipes in different directions, but also facilitate the disassembly and assembly of the fixing clamp (8), which can be easily operated by workers. At the same time, the inner end faces of the fixing clamp (8) are evenly mounted with rubber strips (801), so that when the two fixing clamps (8) are fixing the workpiece, the rubber strips (801) can play a buffering role, preventing the paint on the surface of the workpiece from being knocked off when the fixing clamp (8) is pressed against the workpiece, and the inner end face of the rubber strip (801) is provided with a triangular notch, so that when the rubber strip (801) contacts the workpiece, the friction between the rubber strip (801) and the workpiece can be increased, thereby preventing the workpiece from shaking left and right.

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