Jig for powder spraying of metal bracket

Abstract

The utility model discloses a kind of jigs for metal support powder spraying, including workbench, adjustable support mechanism is equipped on workbench, clamping mechanism is equipped on the adjustable support mechanism, the clamping mechanism is used to clamp workpiece, rotating drive mechanism is equipped below the workbench, adjustable support mechanism includes the base fixedly connected with workbench by four support columns, support frame being equipped on the base, cantilever beam being equipped on support frame and adjustable screw rod assembly being equipped on one side of the support frame, clamping mechanism includes mounting bracket being equipped on one end of cantilever beam, fixed clamping block being equipped on one end of the mounting bracket, clamping cylinder being equipped on the other end of the mounting bracket and sliding clamping block being equipped on the output end of the clamping cylinder, the utility model is accurately adjusted to workpiece horizontal position by adjusting plate, workpiece can be dynamically adjusted angle by rotating drive mechanism, realize multi-surface spraying without frequent dismounting, improve operation efficiency and guarantee coating uniformity.

Description

Technical Field

[0001] This utility model relates to the technical field of powder spraying fixtures, and specifically to a metal bracket powder spraying fixture. Background Technology

[0002] The powder coating process for metal supports uses electrostatic adsorption to evenly cover the metal surface with powder coating, which is then cured at high temperature to form a dense coating with a film thickness of 100-300μm. This significantly improves wear resistance and corrosion resistance, and is applied to artificial joints and surgical instruments to form an antibacterial and wear-resistant coating, extending service life and reducing the risk of cross-infection. After powder coating treatment, aluminum profiles have a coating life of up to 30 years, with rich colors that do not fade for 5-10 years. The anti-corrosion performance is improved through a base powder + flour double coating process. The powder coating process has VOC emissions close to zero, powder utilization rate of over 95%, and overall cost reduction of 40% during mass production. The coating has high adhesion and stable weather resistance for up to 20 years.

[0003] In the existing technology, powder coating operations for metal brackets mostly use fixed fixtures. These fixtures are usually composed of a simple workbench and rigid clamps. Their application is limited to single-sided spraying and requires frequent loading and unloading of workpieces, resulting in problems such as low efficiency and uneven coating thickness in the powder coating operation of metal brackets. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a metal bracket powder coating fixture. It achieves precise positioning by inserting a positioning pin at the front end of the positioning screw into the workpiece's reference hole. When the handwheel is rotated, the adjusting screw engages with the internal thread of the first bearing seat through its external thread, driving the adjusting plate to move along the slide rail, thereby precisely adjusting the horizontal position of the workpiece. The bending stiffness of the mounting frame disperses the torque and shear force generated when clamping the workpiece, stably transmitting the load to the cantilever beam, which is then borne by the support frame and base to prevent workpiece displacement caused by vibration during powder coating. The rotary drive mechanism, through a drive motor, drive wheel, belt, driven wheel, and rotating shaft, allows the workpiece to dynamically adjust its angle for multi-sided spraying without frequent loading and unloading, improving work efficiency and ensuring coating uniformity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A metal bracket powder coating fixture includes a worktable with an adjustable bracket mechanism. A clamping mechanism is mounted on the adjustable bracket mechanism to adjust its height. The clamping mechanism clamps a workpiece. A rotary drive mechanism is located below the worktable to drive the adjustable bracket mechanism to rotate. The adjustable bracket mechanism includes a base fixedly connected to the worktable via four support columns, a support frame on the base, a cantilever beam on the support frame, and an adjustable screw assembly on one side of the support frame. The clamping mechanism includes a mounting frame at one end of the cantilever beam, a fixed clamping block at one end of the mounting frame, a clamping cylinder at the other end of the mounting frame, and a sliding clamping block at the output end of the clamping cylinder. The clamping cylinder drives the sliding clamping block to move, and the sliding clamping block cooperates with the fixed clamping block to clamp the workpiece. The mounting frame includes a first baffle fixedly connected to one end of the cantilever beam and a second baffle fixedly connected via at least one connecting part.

[0006] The base is a rectangular flat plate with a flat bottom surface and an array of mounting holes on the plate surface. The base has a rotatable frustum in the middle, and the adjustable screw assembly is located on the frustum.

[0007] The adjustable screw assembly includes an adjusting plate mounted on a circular platform via two slide rails, a positioning screw mounted on the adjusting plate, an adjusting screw mounted on the circular platform via a first bearing seat, and a handwheel at one end of the adjusting screw. The other end of the adjusting screw is rotatably connected to the adjusting plate via a bearing. The positioning screw is used to position the workpiece.

[0008] The adjustable screw assembly has a positioning pin at the front end of the positioning screw, which is used to insert into the reference hole of the workpiece.

[0009] The rotary drive mechanism includes a drive motor, a drive wheel located at the output end of the drive motor, a driven wheel connected to the drive wheel via a belt, and a rotary shaft passing through the worktable. One end of the rotary shaft is fixedly connected to the driven wheel, and the other end of the rotary shaft is fixedly connected to the lower side of the frustum.

[0010] The driving and driven pulleys of the rotary drive mechanism are both synchronous belt pulleys, the belt is a multi-wedge belt, the rotating shaft is a hollow stepped shaft, and the rotating shaft is interference-fitted with the second bearing seat in the worktable.

[0011] One end of the mounting frame of the clamping mechanism is fixedly connected to the cantilever beam. Both the fixed clamping block and the sliding clamping block are L-shaped structures with grooves on their opposite inner surfaces. The piston rod of the clamping cylinder is fixedly connected to the sliding clamping block through a connector. The cylinder body of the clamping cylinder is fixed to the side wall of the mounting frame by bolts.

[0012] The support frame includes an inner support column, an outer support column sleeved on the inner support column, and an adjusting threaded shaft passing through the outer support column.

[0013] The inner column of the support is provided with a threaded hole, and the adjusting threaded shaft is threadedly connected to the inner threaded hole. The adjusting threaded shaft is fixedly connected to the cantilever beam through a support seat, and an adjusting handle is provided at one end of the adjusting threaded shaft.

[0014] The cantilever beam has a square cross-section, and a connecting plate extending from one end of the cantilever beam is fixedly connected to the support base.

[0015] The beneficial effects of this utility model are as follows: 1. The positioning pin at the front end of the positioning screw is inserted into the reference hole of the workpiece for precise positioning. When the handwheel is rotated, the adjusting screw engages with the internal thread of the first bearing seat through the external thread, driving the adjusting plate to move along the slide rail, thereby accurately adjusting the horizontal position of the workpiece and solving the problem of uneven coating thickness caused by inaccurate workpiece positioning. 2. The bending stiffness of the mounting frame disperses the torque and shear force generated when clamping the workpiece, stably transferring the load to the cantilever beam and borne by the support frame and base to prevent workpiece displacement caused by vibration during powder spraying. The rotary drive mechanism enables the workpiece to dynamically adjust its angle through the drive motor, drive wheel, belt, driven wheel and rotating shaft, allowing for multi-sided spraying without frequent loading and unloading, improving work efficiency and ensuring coating uniformity. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention.

[0017] Figure 2 This is a perspective view of the adjustable support mechanism of this utility model.

[0018] Figure 3 This is an exploded view of the adjustable support mechanism of this utility model.

[0019] Figure 4 This is a cross-sectional view of the support frame of this utility model.

[0020] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0021] Figure 6 This is a perspective view of the clamping mechanism of this utility model.

[0022] Figure 7 This is a perspective view of the rotary drive mechanism of this utility model.

[0023] Explanation of icon numbers: 1-Workbench, 10-Panel, 11-Column, 12-Bottom Connecting Beam, 2-Adjustable Support Mechanism, 20-Support Column, 21-Base, 210-Mounting Hole, 211-Frustum, 2110-Limiting Part, 212-Slide Groove, 22-Support Frame, 220-Inner Support Column, 221-Outer Support Column, 222-Adjusting Threaded Shaft, 2220-Limiting Plate, 223-Nut, 224-Adjusting Handle, 23-Cantilever Beam, 24-Adjustable Screw Assembly, 240-Slide Rail, 2400-Limiting Groove, 241-Adjusting Plate, 2410-Slit, 2411-Stabilizing Block, 24 12-Limiting slide bar, 242-Positioning screw, 2420-Positioning pin, 243-First bearing seat, 244-Adjusting screw, 245-Handwheel, 246-Bearing, 25-Support seat, 3-Clamping mechanism, 30-Mounting bracket, 300-First baffle, 301-Connecting part, 302-Second baffle, 31-Fixed clamping block, 32-Clamping cylinder, 320-Piston rod, 33-Sliding clamping block, 34-Connector, 4-Rotary drive mechanism, 40-Drive motor, 41-Driving wheel, 42-Belt, 43-Driven wheel, 44-Rotating shaft, 45-Second bearing seat. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings: like Figure 1-7As shown, this utility model relates to a fixture for powder coating of a metal bracket, including a workbench 1. The workbench 1 includes a panel 10, columns 11, and a bottom connecting beam 12. The bottom connecting beam 12 connects the four columns 11 into an integral frame, distributing the vertical load borne by the panel 10 and suppressing horizontal swaying, ensuring that the workbench 1 remains stable during operation. The workbench 1 is provided with an adjustable support mechanism 2, and a clamping mechanism 3 is provided on the adjustable support mechanism 2. The adjustable support mechanism 2 is used to adjust the height of the clamping mechanism 3. Mechanism 3 is used to clamp the workpiece. A rotary drive mechanism 4 is located below the worktable 1. This rotary drive mechanism 4 drives the adjustable support mechanism 2 to rotate. The adjustable support mechanism 2 includes a base 21 fixedly connected to the worktable 1 via four support columns 20, a support frame 22 mounted on the base 21, a cantilever beam 23 mounted on the support frame 22, and an adjustable screw assembly 24 located below the cantilever beam 23. The support columns 20 stably connect to the base 21, transferring the load of the base 21 to the worktable 1. The base 21 supports the workpiece. The weight is considered. The support frame 22 is used to connect and install the cantilever beam 23. The connecting plate extending from one end of the cantilever beam 23 is fixedly connected to the support base 25. The adjustable screw assembly 24 is used to adjust the horizontal position of the workpiece. The clamping mechanism 3 includes a mounting frame 30 at one end of the cantilever beam 23, a fixed clamping block 31 at one end of the mounting frame 30, a clamping cylinder 32 at the other end of the mounting frame 30, and a sliding clamping block 33 at the output end of the clamping cylinder 32. The clamping cylinder 32 is used to drive the sliding clamping block 33 to move. 3. The mounting frame 30 is used to clamp the workpiece in conjunction with the fixed clamping block 31. The mounting frame 30 is used to support and stabilize the load of the workpiece in conjunction with the cantilever beam 23. The mounting frame 30 includes a first baffle 300 fixedly connected to one end of the cantilever beam 23 and a second baffle 302 fixedly connected through at least one connecting part 301. The cantilever beam 23 can be a square cross section. The cantilever beam 23 has at least three beams. Each beam is connected end to end to form an arched beam, which is beneficial to maintain balance with the center of gravity of the mounting frame 30. The size can be 10mm×50mm or adapted to the clamping mechanism 3.

[0025] like Figure 1-3 As shown, the base 21 is a rectangular flat plate with a flat bottom surface. The flat plate surface is provided with an array of mounting holes 210. The thickness of the base 21 can be 15-20mm. The mounting holes 210 can be oblong holes with a diameter of 8.5-12.5mm. The support frame 22 is fixed to the base 21 by bolts and mounting holes 210. The base 21 has a rotatable frustum 211 in the middle. The adjustable screw assembly 24 is provided on the frustum 211. A limiting part 2110 extends from one side of the frustum 211. The base 21 is recessed to form a circular groove 212 in cooperation with the limiting part 2110. Through the supporting effect of the groove 212 on the limiting part 2110, the frustum 211 will not sink and detach from the base 21 when rotating.

[0026] like Figure 1-3 As shown, the adjustable screw assembly 24 includes an adjusting plate 241 mounted on a frustum 211 via two slide rails 240, a positioning screw 242 mounted on the adjusting plate 241, an adjusting screw 244 mounted on the frustum 211 via a first bearing seat 243, and a handwheel 245 at one end of the adjusting screw 244. The other end of the adjusting screw 244 is rotatably connected to the adjusting plate 241 via a bearing 246. The positioning screw 242 is used to position the workpiece. The front end of the positioning screw 242 is provided with a positioning pin 2420, which can be round, square, or other shapes, and can be 30mm-50mm in length, for insertion into the reference hole of the workpiece. The adjusting plate 241 is an arc plate with cutouts 2410 on both sides, and a stabilizing pin is provided on the lower side of each end. The stabilizing block 2411 contacts the surface of the frustum 211 and can slide relative to it, maintaining the balance of the adjusting plate 241 during rotation. Below the arc plate is a limiting slide bar 2412 that matches the slide rail 240. The slide rail 240 has a limiting groove 2400 on its side. One side of the limiting slide bar 2412 protrudes into the limiting groove 2400. The slide rail 240 allows the limiting slide bar 2412 to slide only along the horizontal plane of the slide rail 240. When the handwheel 245 is rotated, the adjusting screw 244 rotates synchronously. The external thread on the adjusting screw 244 engages with the internal thread in the first bearing seat 243, causing relative displacement between the adjusting screw 244 and the first bearing seat 243, which moves the adjusting plate 241 along the slide rail 240, thus fine-tuning the position of the workpiece.

[0027] like Figure 1 , 7As shown, the rotary drive mechanism 4 includes a drive motor 40, a drive wheel 41 located at the output end of the drive motor 40, a driven wheel 43 connected to the drive wheel 41 via a belt 42, and a rotary shaft 44 passing through the worktable 1. One end of the rotary shaft 44 is fixedly connected to the driven wheel 43, and the other end of the rotary shaft 44 is fixedly connected to the lower side of the frustum 211. The rotary drive mechanism 4 uses the drive motor 40 as a power source and transmits rotational power to the rotary shaft 44 passing through the worktable 1 via the belt 42 between the drive wheel 41 and the driven wheel 43 at the output end, driving the frustum 211 on the base 21 to rotate. The drive wheel 41 and the driven wheel 43 are synchronous belt pulleys with a tooth count ranging from 8 to 12 teeth and a pitch of 10 mm to 12 mm, and a cross-sectional width of 15 mm to 20 mm. The rotation process maintains synchronization and precision, and the flexible connection characteristics of the belt 42 reduce the impact of mechanical vibration on rotational accuracy. The rotating shaft 44 is set as a hollow stepped shaft to reduce its own weight and enhance the axial stability of rotation. The rotating shaft 44 is interference-fitted with the second bearing seat 45 in the worktable 1 to avoid workpiece position displacement caused by axial movement during rotation. When the drive motor 40 is running, the rotating shaft 44 transmits torque to the frustum 211 fixedly connected to its upper end, driving the frustum 211 and the workpiece carried on it to rotate controllably. The frustum 211 cooperates with the circular groove 212 of the base 21 through the limiting part 2110, which can rotate smoothly and prevent the frustum 211 from sinking and detaching from the base 21 through the support of the limiting part 2110 by the groove 212, thus maintaining the stability and reliability of the rotation process.

[0028] like Figure 1-7 As shown, one end of the mounting frame 30 is fixedly connected to the cantilever beam 23. Both the fixed clamping block 31 and the sliding clamping block 33 are L-shaped structures with grooves on their opposite inner surfaces. The piston rod 320 of the clamping cylinder 32 is fixedly connected to the sliding clamping block 33 through the connector 34. Through the bending stiffness of the U-shaped frame, the torque and shear force generated when clamping the workpiece can be dispersed and stably transmitted to the cantilever beam 23. The support frame 22 and the base 21 bear the dispersed load, ensuring that the clamping mechanism 3 does not deform or loosen during operation. The grooves on the opposite inner surfaces of the fixed clamping block 31 and the sliding clamping block 33 can fit the edge contour of the workpiece, increasing the contact area and friction to improve clamping stability. At the same time, the vertical edge of the L-shape can provide lateral restraint for the workpiece, preventing workpiece displacement caused by vibration during powder spraying. The cylinder body is fastened to the side wall of the mounting frame 30 with bolts to stabilize the power transmission path, avoid displacement or shaking of the cylinder itself, and ensure the accuracy and reliability of the clamping action.

[0029] like Figure 3-5As shown, the support frame 22 includes an inner support column 220, an outer support column 221 sleeved on the inner support column 220, and an adjusting threaded shaft 222 passing through the outer support column 221. The inner support column 220 has a threaded hole through which the adjusting threaded shaft 222 is threadedly connected. A limiting plate 2220 is provided at one end of the inner wall of the outer support column 221. The support seat 25 also passes through one end of the adjusting threaded shaft 222. A nut 223, in conjunction with the limiting plate 2220, vertically limits the outer support column 221, the support seat 25, and the adjusting threaded shaft 222. An adjusting handle 224 is provided at one end of the adjusting threaded shaft 222, based on the inner support column 220. The column has a threaded hole inside that forms a helical transmission pair with the adjusting threaded shaft 222. When the adjusting handle 224 is rotated, the adjusting threaded shaft 222 rotates in the threaded hole and generates axial displacement. This displacement is transmitted to the support base 25 through the adjusting threaded shaft 222 passing through the outer support column 221. This, in turn, drives the cantilever beam 23, which is fixedly connected to the support base 25, to move axially along the outer support column 221, thereby adjusting the height of the clamping mechanism 3. The outer support column 221 is sleeved outside the inner support column 220 to prevent the cantilever beam 23 from swaying during lifting and lowering, and also to prevent powder from entering the threaded hole and causing blockage. The load is stably transmitted to the worktable 1 through the connection between the inner support column 220 and the base 21 on the worktable 1.

[0030] In use, firstly, place the workpiece to be powdered in the middle of the adjusting plate 241 on the frustum 211, so that the positioning pin 2420 at the front end of the positioning screw 242 on the adjusting plate 241 is accurately inserted into the reference hole of the workpiece. The adjusting plate 241 on the frustum 211 is horizontally positioned by the adjustable screw assembly 24. Rotating the handwheel 245 drives the adjusting screw 244 to rotate, causing the adjusting plate 241 to move along the slide rail 240, thus completing the fine adjustment of the horizontal position of the workpiece. The height of the cantilever beam 23 is adjusted by adjusting the threaded shaft 222 through the cooperation of the inner support column 220 and the outer support column 221 of the support frame 22. The operator rotates the adjusting handle 224, so that the adjusting threaded shaft 222 rotates in the threaded hole of the inner support column 220 and generates axial displacement. This displacement is transmitted to the support seat fixedly connected to the cantilever beam 23 through the adjusting threaded shaft 222 passing through the outer support column 221. 25. The cantilever beam 23 is moved axially along the outer support column 221 to the clamping height; the clamping mechanism 3 is activated, and the clamping cylinder 32 drives the sliding clamping block 33 to move towards the fixed clamping block 31. The grooves on the inner sides of the two clamp the workpiece. After the first powder spraying process is completed, the clamping mechanism 3 releases the workpiece and starts the rotary drive mechanism 4. The drive motor 40 transmits power to the rotating shaft 44 through the belt 42 between the drive wheel 41 and the driven wheel 43, driving the frustum 211 and the workpiece to rotate synchronously. The frustum 211 is kept rotating smoothly by the cooperation of the limiting part 2110 and the circular sliding groove 212 of the base 21. After the workpiece is rotated to the other side, it is adjusted horizontally again by the adjustable screw assembly 24. Then the clamping mechanism 3 clamps and fixes the workpiece again to complete the second powder spraying process. This process continues until all the powder spraying surfaces of the workpiece are treated.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. Therefore, without departing from the design spirit of the present utility model, any equivalent changes or modifications made by those skilled in the art to the structure, features and principles of the present utility model should fall within the protection scope of the patent application of the present utility model.

Claims

1. A fixture for powder coating of a metal support, comprising a worktable, characterized in that: The workbench is equipped with an adjustable support mechanism, on which a clamping mechanism is provided. The adjustable support mechanism is used to adjust the height of the clamping mechanism, and the clamping mechanism is used to clamp the workpiece. A rotary drive mechanism is provided below the workbench to drive the adjustable support mechanism to rotate. The adjustable support mechanism includes a base fixedly connected to the workbench via four support columns, a support frame on the base, a cantilever beam on the support frame, and an adjustable screw assembly on one side of the support frame. The clamping mechanism includes a mounting frame at one end of the cantilever beam, a fixed clamping block at one end of the mounting frame, a clamping cylinder at the other end of the mounting frame, and a sliding clamping block at the output end of the clamping cylinder. The clamping cylinder drives the sliding clamping block to move, and the sliding clamping block cooperates with the fixed clamping block to clamp the workpiece. The mounting frame includes a first baffle fixedly connected to one end of the cantilever beam and a second baffle fixedly connected via at least one connecting part.

2. The fixture for powder coating of a metal bracket according to claim 1, characterized in that: The base has an array of mounting holes, and a rotatable frustum is located in the center of the base. The adjustable screw assembly is located on the frustum.

3. The fixture for powder coating of a metal support according to claim 2, characterized in that: The adjustable screw assembly includes an adjusting plate mounted on a circular platform via two slide rails, a positioning screw mounted on the adjusting plate, an adjusting screw mounted on the circular platform via a first bearing seat, and a handwheel at one end of the adjusting screw. The other end of the adjusting screw is rotatably connected to the adjusting plate via a bearing. The positioning screw is used to position the workpiece.

4. The fixture for powder coating of a metal bracket according to claim 3, characterized in that: The adjustable screw assembly has a positioning pin at the front end of the positioning screw, which is used to insert into the reference hole of the workpiece.

5. The fixture for powder coating of a metal bracket according to claim 1, characterized in that: The rotary drive mechanism includes a drive motor, a drive wheel located at the output end of the drive motor, a driven wheel connected to the drive wheel via a belt, and a rotary shaft passing through the worktable. One end of the rotary shaft is fixedly connected to the driven wheel, and the other end of the rotary shaft is fixedly connected to the lower side of the frustum.

6. The fixture for powder coating of a metal bracket according to claim 5, characterized in that: The driving and driven pulleys of the rotary drive mechanism are both synchronous belt pulleys, the belt is a multi-wedge belt, the rotating shaft is a hollow stepped shaft, and the rotating shaft is interference-fitted with the second bearing seat in the worktable.

7. The fixture for powder coating of a metal bracket according to claim 1, characterized in that: One end of the mounting frame of the clamping mechanism is fixedly connected to the cantilever beam. Both the fixed clamping block and the sliding clamping block are L-shaped structures with grooves on their opposite inner surfaces. The piston rod of the clamping cylinder is fixedly connected to the sliding clamping block through a connector. The cylinder body of the clamping cylinder is fixed to the side wall of the mounting frame by bolts.

8. The fixture for powder coating of a metal bracket according to claim 1, characterized in that: The support frame includes an inner support column, an outer support column sleeved on the inner support column, and an adjusting threaded shaft passing through the outer support column.

9. A fixture for powder coating of a metal support according to claim 8, characterized in that: The inner column of the support is provided with a threaded hole, and the adjusting threaded shaft is threadedly connected to the inner threaded hole. The adjusting threaded shaft is fixedly connected to the cantilever beam through a support seat, and an adjusting handle is provided at one end of the adjusting threaded shaft.

10. A fixture for powder coating of a metal support according to claim 1, characterized in that: The cantilever beam has a square cross-section, and a connecting plate extending from one end of the cantilever beam is fixedly connected to the support base.

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