A fixture for PVD coating of automobile parts

Abstract

This utility model relates to the field of fixture technology and proposes a fixture for PVD coating of automotive parts. It includes a base, a rotating cylinder rotatably connected to the top of the base, a heating box fixedly connected to the top of the rotating cylinder, a placement platform for placing parts fixedly connected to the bottom wall of the inner side of the heating box, and several movable seats arranged in a circumferential array slidably connected to the outer edge of the inner side of the heating box. Each movable seat has an elastic element fixedly connected to its top, and a clamping plate fixedly connected to one end of each elastic element. An adjustment mechanism for driving the movable seats to slide towards or away from each other is provided inside the rotating cylinder, and a drive mechanism for driving the rotating cylinder to rotate is provided at the bottom of the base. This utility model can achieve rapid fixing of parts to reduce positioning time and improve the work efficiency of the parts coating process.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically to a fixture for PVD coating of automotive parts. Background Technology

[0002] In the automotive manufacturing industry, physical vapor deposition (PVD) coating technology is widely used in the surface treatment of automotive parts (such as wheels, trim pieces, or electronic components). PVD coating deposits a thin film of metal or ceramic in a vacuum environment, giving the parts properties such as wear resistance, corrosion resistance, and aesthetics, thereby improving the product's durability and market competitiveness.

[0003] However, the fixing and positioning of components are crucial in the PVD coating process, and the performance of the fixture directly affects the coating efficiency and quality. Existing fixture technology has many limitations in PVD coating applications, as follows: First, existing fixtures mostly use manual or semi-automatic clamping methods, such as fixing parts with bolts or simple clips. This makes the operation process cumbersome. Workers need to repeatedly adjust the position of the fixture to ensure that the parts are centered. Each positioning takes several minutes. In mass production, this inefficient positioning mechanism significantly prolongs the production cycle and reduces the overall coating efficiency. Second, existing clamping mechanisms lack elastic cushioning, and the clamping plates often use rigid materials to directly contact the components. When components (especially irregularly shaped or thin-walled parts) are clamped, excessive clamping force may cause deformation, scratches, or breakage, which not only increases the scrap rate but also raises manufacturing costs. Third, the PVD coating process requires the surface of the component to be uniformly exposed to the deposition source. However, most existing fixtures are fixed in place, and the component remains stationary during the coating process. This results in uneven thickness of the deposited film in different areas of the component—for example, the film is thicker on the side closer to the deposition source and thinner on the back side. Uneven coating not only reduces the consistency of the product's appearance (such as color differences or spots) but also weakens its functionality (such as reduced corrosion resistance). Utility Model Content

[0004] This utility model proposes a fixture for PVD coating of automotive parts, which solves the problem of long positioning time for parts in related technologies.

[0005] The technical solution of this utility model is as follows: A fixture for PVD coating of automotive parts includes a base, a rotating cylinder rotatably connected to the top of the base, a heating box fixedly connected to the top of the rotating cylinder, a placement platform for placing parts fixedly connected to the bottom wall of the inner side of the heating box, a plurality of movable seats arranged in a circumferential array slidably connected to the outer edge of the inner side of the heating box, an elastic element fixedly connected to the top of each of the movable seats, a clamping plate fixedly connected to one end of each of the elastic elements, an adjustment mechanism for driving the movable seats to slide towards or away from each other on the inner side of the rotating cylinder, and a drive mechanism for driving the rotating cylinder to rotate at the bottom of the base.

[0006] Preferably, the adjusting mechanism includes a lead screw rotatably connected to the inner side of the rotating cylinder, the lead screw being concentrically arranged with the rotating cylinder, a slider threadedly connected to the lead screw, the slider being slidably connected to the inner wall of the rotating cylinder, a plurality of connecting rods corresponding one-to-one with the movable seats being hinged to the outer edge of the slider, a connecting seat being fixedly connected to the bottom of each of the movable seats, the top ends of the connecting rods being hinged to the corresponding connecting seats, and a first motor being fixedly installed at the bottom of the base, the output shaft of the first motor being fixedly connected to the lead screw.

[0007] Preferably, the side wall of the rotating cylinder is provided with a plurality of sliding grooves corresponding one-to-one with the connecting rods, and the outer edge of the slider is fitted with the sliding grooves with a clearance.

[0008] Preferably, the bottom wall of the heating box is provided with a plurality of guide grooves that match the connecting seats, and the plurality of connecting seats are clearance-fitted with the corresponding guide grooves.

[0009] Preferably, the elastic element includes a sleeve, one end of which is fixedly connected to the movable seat, and the other end of which is inserted into a sleeve rod, the end of which is away from the sleeve and connected to the clamping plate.

[0010] Preferably, a limiting block is slidably connected to the inner side of the sleeve, one side of the limiting block is fixedly connected to the sleeve rod, and a spring is sleeved on one end of the inner side of the sleeve, with the two ends of the spring abutting against the limiting block and the inner wall of the sleeve, respectively.

[0011] Preferably, the drive mechanism includes a first gear fixedly connected to the bottom of the rotating cylinder, a second motor fixedly installed at the bottom of the base, and a second gear fixedly connected to the output shaft of the second motor, the second gear meshing with the first gear.

[0012] The working principle and beneficial effects of this utility model are as follows: 1. By starting the first motor, the lead screw is rotated to drive the slider to move up and down. The connecting rod pulls the movable seat to slide inward along the guide groove, so that the clamping plates move synchronously in opposite directions, ensuring that the parts are automatically centered and clamped. The operation time is greatly shortened and the coating efficiency in mass production is greatly improved.

[0013] 2. When the clamping plate contacts the accessory, the spring is compressed inside the sleeve, and the impact force is absorbed by the limit block to achieve elastic buffering. The clamping force can adapt to the shape of the accessory (especially irregular or thin-walled parts) to avoid overload damage.

[0014] 3. By starting the second motor, the second gear is driven to rotate, which in turn drives the rotating cylinder and heating box to rotate, causing the components to rotate. This ensures that all areas are evenly exposed to the deposition source, solving the problem of uneven film thickness caused by the fixed fixture in the prior art. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This utility model discloses a structural schematic diagram of a fixture for PVD coating of automotive parts. Figure 1 ; Figure 2 This utility model discloses a structural schematic diagram of a fixture for PVD coating of automotive parts. Figure 2 ; Figure 3 This is a schematic diagram of the adjustment mechanism proposed in this utility model; Figure 4 This is a schematic diagram of the structure of the elastic element proposed in this utility model; Figure 5 This is a schematic diagram of the drive mechanism proposed in this utility model.

[0017] In the diagram: 1. Base; 2. Rotating cylinder; 3. Heating box; 4. Placement platform; 5. Movable seat; 6. Elastic element; 61. Sleeve; 62. Sleeve rod; 63. Limiting block; 64. Spring; 7. Clamping plate; 8. Adjustment mechanism; 81. Lead screw; 82. Slider; 83. Connecting rod; 84. Slide groove; 85. Connecting seat; 86. First motor; 9. Drive mechanism; 91. First gear; 92. Second motor; 93. Second gear; 10. Guide groove. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0019] This application discloses a fixture for PVD coating of automotive parts. Please refer to [link to relevant documentation]. Figure 1 and Figure 2A fixture for PVD coating of automotive parts includes a base 1, a rotating cylinder 2 rotatably connected to the top of the base 1, a heating box 3 fixedly connected to the top of the rotating cylinder 2, a placement platform 4 for placing parts fixedly connected to the bottom wall of the inner side of the heating box 3, a plurality of movable seats 5 arranged in a circumferential array slidably connected to the outer edge of the inner side of the heating box 3, an elastic element 6 fixedly connected to the top of each of the movable seats 5, a clamping plate 7 fixedly connected to one end of each of the elastic elements 6, an adjustment mechanism 8 for driving the movable seats 5 to slide towards or away from each other on the inner side of the rotating cylinder 2, and a drive mechanism 9 for driving the rotating cylinder 2 to rotate at the bottom of the base 1.

[0020] Before coating, the parts are placed on the placement table 4, and then the adjustment mechanism 8 is operated to drive all the movable seats 5 to move towards each other, so that all the elastic parts 6 drive the clamping plates 7 to move towards each other simultaneously and clamp the center of the parts. This achieves quick fixation of the parts to reduce positioning time and improves the work efficiency of the parts coating process. During the coating process, the drive mechanism 9 is activated to drive the rotating cylinder 2 to rotate, so that the heating box 3 rotates synchronously. This causes the parts inside the heating box 3 to rotate, so that different areas of the parts can be coated evenly during the coating process, which is beneficial to improving the coating quality of the parts.

[0021] Please see Figures 1-5 The adjusting mechanism 8 includes a lead screw 81 rotatably connected to the inner side of the rotating cylinder 2. The lead screw 81 is concentrically arranged with the rotating cylinder 2. A slider 82 is threadedly connected to the lead screw 81. The slider 82 is slidably connected to the inner wall of the rotating cylinder 2. Several connecting rods 83 corresponding to the movable seats 5 are hinged to the outer edge of the slider 82. Connecting seats 85 are fixedly connected to the bottom of the movable seats 5. Several guide grooves 10 matching the connecting seats 85 are opened on the bottom wall of the heating box 3. Several connecting seats 85 are clearance-fitted with the corresponding guide grooves 10. The top of several connecting rods 83 is hinged to the corresponding connecting seats 85. Several sliding grooves 84 corresponding to the connecting rods 83 are opened on the side wall of the rotating cylinder 2. The outer edge of the slider 82 is clearance-fitted with the sliding groove 84. A first motor 86 is fixedly installed on the bottom of the base 1. The output shaft of the first motor 86 is fixedly connected to the lead screw 81.

[0022] Before coating, the components need to be centered. The specific implementation process is as follows: By starting the first motor 86 to drive the lead screw 81 to rotate, the slider 82 can move downwards, causing all the connecting rods 83 to pull the corresponding connecting seats 85 to slide centripetally along the guide groove 10. This causes all the movable seats 5 to move towards each other, and all the elastic elements 6 to drive the clamping plates 7 to move towards each other simultaneously and clamp the center of the parts. This achieves rapid fixing of the parts to reduce positioning time and improves the working efficiency of the parts coating process.

[0023] Please see Figure 1and 4 The elastic element 6 includes a sleeve 61, one end of which is fixedly connected to the movable seat 5, and the other end of the sleeve 61 is inserted with a sleeve rod 62. The end of the sleeve rod 62 away from the sleeve 61 is connected to the clamping plate 7. A limit block 63 is slidably connected to the inner side of the sleeve 61. One side of the limit block 63 is fixedly connected to the sleeve rod 62. A spring 64 is sleeved on one end of the inner side of the sleeve 61. The two ends of the spring 64 abut against the limit block 63 and the inner wall of the sleeve 61, respectively.

[0024] The design of spring 64 allows the sleeve rod 62 and sleeve 61 to be elastically connected, so that when the clamping plate 7 clamps the part, spring 64 can provide elastic buffer for the part, avoiding the problem of excessive clamping force of the clamping plate 7 on the part causing damage to the part.

[0025] Please see Figure 1 and 5 The drive mechanism 9 includes a first gear 91 fixedly connected to the bottom of the rotating cylinder 2, a second motor 92 fixedly installed at the bottom of the base 1, and a second gear 93 fixedly connected to the output shaft of the second motor 92. The second gear 93 meshes with the first gear 91.

[0026] Working principle: Before coating, the parts are placed on the placement table 4, and then the first motor 86 is started to drive the lead screw 81 to rotate, so that the slider 82 can move downward. This causes all the connecting rods 83 to pull the corresponding connecting seats 85 to slide centripetally along the guide groove 10. This causes all the movable seats 5 to move towards each other, and all the elastic elements 6 to drive the clamping plates 7 to move towards each other at the same time and clamp the center of the parts. This achieves rapid fixation of the parts to reduce positioning time and improves the working efficiency of the coating process. During the coating process, the second motor 92 is started to drive the second gear 93 to rotate, which in turn drives the first gear 91 to rotate synchronously. This causes the rotating cylinder 2 to rotate, which in turn causes the heating box 3 to rotate synchronously. This causes the components inside the heating box 3 to rotate, so that different areas of the components can be coated evenly during the coating process, which is beneficial to improving the coating quality of the components.

[0027] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A fixture for PVD coating of automobile parts, comprising a base (1), characterized in that, The top of the base (1) is rotatably connected to a rotating cylinder (2), the top of the rotating cylinder (2) is fixedly connected to a heating box (3), the bottom wall of the inner side of the heating box (3) is fixedly connected to a placement platform (4) for placing accessories, the outer edge of the inner side of the heating box (3) is slidably connected to several movable seats (5) arranged in a circular array, the top of each of the movable seats (5) is fixedly connected to an elastic element (6), one end of each of the elastic elements (6) is fixedly connected to a clamp (7), the inner side of the rotating cylinder (2) is provided with an adjustment mechanism (8) for driving the several movable seats (5) to slide towards or away from each other, and the bottom of the base (1) is provided with a drive mechanism (9) for driving the rotating cylinder (2) to rotate.

2. The fixture for PVD coating of automobile parts according to claim 1, characterized in that, The adjustment mechanism (8) includes a lead screw (81) rotatably connected to the inner side of the rotating cylinder (2). The lead screw (81) is concentrically arranged with the rotating cylinder (2). A slider (82) is threadedly connected to the lead screw (81). The slider (82) is slidably connected to the inner wall of the rotating cylinder (2). Several connecting rods (83) corresponding to the movable seats (5) are hinged to the outer edge of the slider (82). A connecting seat (85) is fixedly connected to the bottom of each of the movable seats (5). The top of each of the connecting rods (83) is hinged to the corresponding connecting seat (85). A first motor (86) is fixedly installed at the bottom of the base (1). The output shaft of the first motor (86) is fixedly connected to the lead screw (81).

3. The fixture for PVD coating of automobile parts according to claim 2, characterized in that, The side wall of the rotating cylinder (2) is provided with a number of sliding grooves (84) that correspond one-to-one with the connecting rod (83), and the outer edge of the slider (82) is in clearance fit with the sliding groove (84).

4. The fixture for PVD coating of automobile parts according to claim 2, wherein The bottom wall of the heating box (3) is provided with several guide grooves (10) that match the connecting seats (85), and the connecting seats (85) are in clearance fit with the corresponding guide grooves (10).

5. The fixture for PVD coating of automobile parts according to claim 1, wherein The elastic element (6) includes a sleeve (61), one end of which is fixedly connected to the movable seat (5), and the other end of the sleeve (61) is inserted with a sleeve rod (62), the end of the sleeve rod (62) away from the sleeve (61) being connected to the clamping plate (7).

6. The fixture for PVD coating of automobile parts according to claim 5, characterized in that The inner side of the sleeve (61) is slidably connected to a limiting block (63), one side of the limiting block (63) is fixedly connected to the sleeve rod (62), and one end of the inner side of the sleeve (61) is fitted with a spring (64), the two ends of the spring (64) respectively abutting against the limiting block (63) and the inner wall of the sleeve (61).

7. The fixture for PVD coating of automobile parts according to claim 1, characterized in that, The drive mechanism (9) includes a first gear (91) fixedly connected to the bottom of the rotating cylinder (2), and a second motor (92) fixedly installed at the bottom of the base (1). The output shaft of the second motor (92) is fixedly connected to a second gear (93), and the second gear (93) meshes with the first gear (91).

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