A low-cost pneumatic masking and painting fixture for automotive interior parts

Abstract

This utility model relates to a low-cost pneumatic masking and painting fixture for automotive interior parts, including a worktable with six identical support legs at its lower end. A four-axis power mechanism is located on the upper left side of the worktable, and a workpiece to be painted is located on the right side of the four-axis power mechanism. A painting station is located on the right side of the workpiece, and a movable masking frame is located on the right side of the painting station. The four-axis power mechanism enables four-axis movement of the paint gun. A motor and a threaded rod are installed between the vertical and horizontal movements to facilitate limited painting during the vertical movement of the paint gun. Cylinders are used on the left and right sides to smoothly move the paint gun left and right, ensuring more stable painting and better painting effect. The movable masking frame, with rectangular masking frames of different sizes, improves painting efficiency, and the replaceable rubber masking surface allows for a wider range of painted parts.

Description

Technical Field

[0001] This utility model relates to the field of masking and spraying equipment technology, and in particular to a low-cost pneumatic masking and spraying fixture for automotive interior parts. Background Technology

[0002] Automotive interior parts (such as dashboards, door panels, center consoles, steering wheel trims, air vents, etc.) typically have complex 3D curved surfaces, gaps, button holes, and texture details. Traditional manual masking (applying tape, masking paper / film) is time-consuming, has low precision, and is prone to paint seepage. Tooling is needed to quickly and accurately cover these non-painted areas automatically.

[0003] Patent No. CN202321559516.0 discloses a masking and painting fixture for automotive processing. It involves placing a locking block and mounting rod, mounted at one end of an upper cover base, into a groove and a slot on the surface of a lower cover base, respectively. The upper cover base then rotates the locking block connected to the mounting rod within the groove. Because the outer diameter of the locking block is larger than the inner diameter of the groove, the locking block engages within the groove, achieving a locking effect. This allows for quick installation of the lower and upper cover bases. Disassembly requires only rotation. The sloping surfaces of the lower and upper cover bases facilitate paint sliding down the slope. However, this device has the following problems: firstly, relying on automatic paint sliding can easily lead to paint accumulation and poor surface smoothness; secondly, its applicability is limited, as it cannot effectively mask and paint multiple automotive interior parts. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by using a four-axis power mechanism to achieve four-axis movement of the paint spray gun. A motor and a threaded rod are installed between the vertical and horizontal movements to facilitate limited spraying during the vertical movement of the paint spray gun. Then, cylinders are used on the left and right sides to smoothly move the paint spray gun left and right, ensuring more stable spraying and better spraying effect. In addition, an movable masking frame is set up, and rectangular masking frames of different sizes are used to solve the technical problems of long spraying masking time, low accuracy and easy paint bleeding in existing technologies.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A low-cost pneumatic masking and painting fixture for automotive interior parts includes a worktable with six identical support legs at the lower end. A four-axis power mechanism is located on the upper left side of the worktable, and a workpiece to be painted is located on the right side of the four-axis power mechanism. A painting station is located on the right side of the workpiece, and a movable masking frame is located on the right side of the painting station.

[0007] As a preferred embodiment, the four-axis power mechanism includes a base, a C-shaped mounting plate fixedly connected to the upper end of the base, a C-shaped fixing block fixedly connected to the center of the upper end of the C-shaped mounting plate, a No. 1 motor fixedly connected to the upper end of the C-shaped fixing block, an output shaft provided at the lower end of the No. 1 motor, a threaded rod fixedly connected to the lower end of the output shaft, a movable block threadedly connected to the threaded rod, and a transverse connecting plate fixedly connected to the front end of the movable block.

[0008] As a preferred embodiment, the upper end bearing of the threaded rod is connected to a C-shaped fixing block, and the lower end bearing of the threaded rod is connected to a rectangular plate, with a C-shaped mounting plate fixedly connected to the rear end of the rectangular plate.

[0009] As a preferred embodiment, a limiting cylinder is fixedly connected to the left side of the transverse connecting plate, a telescopic rod is connected to the right end of the limiting cylinder, a sliding block is fixedly connected to the right end of the telescopic rod, a stable rectangular connecting block is fixedly connected to the front end of the sliding block, stable sliding C-shaped blocks are fixedly connected to the upper and lower sides of the rear end of the stable rectangular connecting block, and an elongated C-shaped plate is fixedly connected to the center of the stable rectangular connecting block. A slide rail is slidably connected to the rear end of each stable sliding C-shaped block, and the transverse connecting plate is fixedly connected to the rear end of the slide rail.

[0010] As a preferred embodiment, the elongated C-shaped plate is fixedly connected to the right side of the workpiece to be painted. The workpiece includes a paint gun, the upper end of which is connected to a paint can, and a paint head is provided on the right side of the paint gun. A large paint hole is provided at the center of the right side of the paint head, and the upper and lower ends of the large paint hole are provided with the same small paint holes. A diffusion block is provided at a position where the small paint holes are far apart from each other. A diffusion slope is provided on the right side of the side where the diffusion blocks are close to each other, and a disc starter is fixedly connected to the left side of the diffusion block.

[0011] As a preferred embodiment, the spray painting station includes a second motor, which is placed inside the workbench. The upper end of the second motor is fixedly connected to a U-shaped platform, and the upper end of the U-shaped platform is fixedly connected to the workbench. An output shaft is provided at the center of the upper end of the second motor. The output shaft is connected to the U-shaped platform by a bearing, and the upper end of the output shaft is connected to the workbench by a bearing. A turntable is fixedly connected to the uppermost end of the output shaft, and the workpiece to be painted is placed on the upper end of the turntable.

[0012] As a preferred embodiment, the movable shielding frame includes sliding track blocks arranged at the front and rear ends. The upper end of the sliding track block is provided with three sets of sliding grooves. The sliding grooves are distributed in a stepped manner, and each of the sliding grooves on one side is movably connected to four identical sliding wheels. A rotating shaft is provided at the center of the sliding wheels. The rotating shaft is connected to a rectangular shielding frame by a bearing. The outermost rectangular shielding frame has the largest length, width, and height, and the inner rectangular shielding frames have progressively smaller length, width, and height.

[0013] As a preferred embodiment, the front end of the rectangular shielding frame is provided with a rubber shielding surface, and the rubber shielding surface is fitted with paint spray holes, and each of the rubber shielding surfaces is provided with a paint spray hole.

[0014] As another preferred embodiment, the outermost rectangular shielding frame is hinged to the front and rear sides to close the door, and the innermost rectangular shielding frame is threaded to the rear end with a protective plate.

[0015] The beneficial effects of this utility model are:

[0016] (1) In this utility model, a four-axis power mechanism is set up, and the No. 1 motor is used to position and move the paint gun at the upper and lower ends. Because the No. 1 motor is a forward and reverse motor, and its operation drives the output shaft to rotate, the output shaft drives the threaded rod to rotate, the threaded rod is threadedly connected to the movable block, the threaded rod rotates, and the movable block moves at the upper and lower ends. When the movable block stops moving, the external thread of the threaded rod and the internal thread of the movable block cooperate with each other to make the paint gun stably at the adjusted height.

[0017] (2) In this utility model, a cylinder is set up, and the cylinder works to drive the telescopic rod to extend and retract. Then the telescopic rod can drive the sliding block to slide. The stable sliding C-block is set up to ensure that the paint gun is more stable when sliding left and right. Moreover, the cylinder adopts Festo ADNGS, which supports multi-point limit of stroke.

[0018] (3) In this utility model, by setting up an active masking frame, using rectangular masking frames of different sizes, the largest rectangular masking frame has the largest holes cut out on the rubber masking surface, which is suitable for painting the door panel. Then, the next largest rectangular masking frame has the rubber masking surface cut out holes for steering wheel trim, and the last rectangular masking frame has the rubber masking surface cut out holes for button holes. In this way, when the paint gun is working, different trims will not be unable to be painted because the rubber masking surface at the front end is too small, resulting in the paint gun not being able to penetrate and the paint not being applied properly. It is simple and convenient. Moreover, the rubber masking surface can be disassembled, replaced and cleaned. In this way, even if other trims need to be painted, the rubber masking surface can be replaced manually. Although replacing the rubber masking surface also takes time, for painting a large number of identical trims, the replacement of the rubber masking surface in the early stage is significantly more efficient than applying tape or masking paper / film to each trim.

[0019] In summary, this tooling has the advantages of simple principle, suitability for mass production of decorative parts painting, high painting efficiency, and wide applicability, especially in the field of masking and painting equipment technology. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the limiting cylinder in this utility model.

[0023] Figure 3 This is a schematic diagram of the slide rail structure in this utility model.

[0024] Figure 4 This is a schematic diagram of the rectangular plate in this utility model.

[0025] Figure 5 This is a schematic diagram of the structure of the paint spray gun in this utility model. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figures 1 to 5 As shown, this utility model provides a low-cost pneumatic masking and painting fixture for automotive interior parts, including a workbench 1. The lower end of the workbench 1 is provided with six identical support legs 11, and the upper left side of the workbench 1 is provided with a four-axis power mechanism 2. The right side of the four-axis power mechanism 2 is provided with a painting workpiece 3, the right side of the painting workpiece 3 is provided with a painting station 4, and the right side of the painting station 4 is provided with a movable masking frame 5.

[0029] Furthermore, the four-axis power mechanism 2 includes a base 21, with a C-shaped mounting plate 22 fixedly connected to the upper end of the base 21. A C-shaped fixing block 23 is fixedly connected to the center of the upper end of the C-shaped mounting plate 22. A first motor 24 is fixedly connected to the upper end of the C-shaped fixing block 23. An output shaft is provided at the lower end of the first motor 24. A threaded rod 25 is fixedly connected to the lower end of the output shaft. The threaded rod 25 is threadedly connected to a movable block 26. A transverse connecting plate 27 is fixedly connected to the front end of the movable block 26. When the first motor 24 works, it drives the output shaft to rotate. The rotation of the output shaft drives the threaded rod 25 fixedly connected to it to work. The rotation of the threaded rod 25 causes the movable block 226 to adjust its position up and down on the threaded rod 25. When the movable block stops moving, the external thread of the threaded rod and the internal thread of the movable block cooperate with each other to make the paint gun stably at the adjusted height.

[0030] Furthermore, the upper end of the threaded rod 25 is connected to a C-shaped fixing block 23 by a bearing, and the lower end of the threaded rod 25 is connected to a rectangular plate 28 by a bearing. The rear end of the rectangular plate 28 is fixedly connected to a C-shaped mounting plate 22. Both the upper and lower ends of the threaded rod 25 are connected to the C-shaped fixing block 23 and the rectangular plate 28 by bearings, which makes the rotation of the threaded rod 25 more stable.

[0031] Furthermore, a limiting cylinder 271 is fixedly connected to the left side of the transverse connecting plate 27, and a telescopic rod 272 is connected to the right end of the limiting cylinder 271. A sliding block 273 is fixedly connected to the right end of the telescopic rod 272, and a stable rectangular connecting block 274 is fixedly connected to the front end of the sliding block 273. Stable sliding C-shaped blocks 275 are fixedly connected to the upper and lower rear ends of the stable rectangular connecting block 274, and an elongated C-shaped plate 276 is fixedly connected to the center of the stable rectangular connecting block 274. A slide rail 277 is slidably connected to the rear ends of the stable sliding C-shaped blocks 275, and the transverse connecting plate 27 is fixedly connected to the rear ends of the slide rail 277. When the limiting cylinder 271 starts to work, the telescopic rod 272 moves left and right. Moreover, the cylinder is a Festo ADNGS model cylinder, which supports multi-point limit of the stroke, so the paint gun 31 works more stably.

[0032] Furthermore, the right side of the elongated C-shaped plate 276 is fixedly connected to the painting workpiece 3. The painting workpiece 3 includes a paint gun 31, the upper end of which is connected to a paint can 32, and a paint head 33 is provided on the right side of the paint gun 31. A large paint hole 34 is provided at the center of the right side of the paint head 33. The upper and lower ends of the large paint hole 34 are provided with identical small paint holes 35. A diverging block 36 is provided at a position where the small paint holes 35 are far apart from each other. A diffusion ramp is provided on the right side of the diverging block 36 on the side where they are close to each other, and a disc starter 33 is fixedly connected to the left side of the diverging block 36. The paint gun 31 is a Devilbiss GTi Pro model paint gun, which is suitable for tooling parts such as bumpers and door panels that need to be quickly covered. When it is necessary to touch up the paint on complex masking boundaries such as dashboard button grooves and door panel seam grooves, a SATAjet 1500 is used. Although the extended C-shaped plate 276 of the HVLP model paint gun 31 is fixedly connected to the workpiece 3, it is fixed by a threaded nut. When it needs to be replaced, it can also be replaced manually with a screwdriver.

[0033] Furthermore, the spray painting station 4 includes a second motor 41, which is placed inside the workbench 1. The upper end of the second motor 41 is fixedly connected to a U-shaped platform 42, and the upper end of the U-shaped platform 42 is fixedly connected to the workbench 1. An output shaft is provided at the center of the upper end of the second motor 41. The output shaft is connected to the U-shaped platform 42 by a bearing, and the upper end of the output shaft is connected to the workbench 1 by a bearing. The uppermost end of the output shaft is fixedly connected to a turntable 43. The workpiece to be painted is placed on the upper end of the turntable 43. When the second motor 41 starts working, its output shaft rotates, thereby driving the turntable 43 to rotate. The workpiece to be painted placed on the upper end of the turntable 43 needs to be fixed. An AutoSpin QX12 model turntable is used, which has 6 types of workpiece clamping to ensure that the workpiece to be painted will not be thrown out during rotation. Multi-color spraying of body panels and uniform coverage of complex curved surfaces have a yield rate of >99%.

[0034] Furthermore, the movable shielding frame 5 includes sliding track blocks 51 arranged at the front and rear ends. The upper end of each sliding track block 51 has three sets of sliding grooves, which are arranged in a stepped manner. Each stepped groove on one side is movably connected to four identical sliding wheels. A rotating shaft is located at the center of each sliding wheel, and the rotating shaft is bearing-connected to a rectangular shielding frame 52. The outermost rectangular shielding frame 52 has the largest length, width, and height, while the inner rectangular shielding frames 52 decrease in length, width, and height sequentially. Different sizes of rectangular shielding frames 52 are used. The largest rectangular masking frame 52 has the largest holes cut into its rubber masking surface 53, which is suitable for painting the door panel. The next largest rectangular masking frame 52 has rubber masking surfaces 53 with holes cut into the steering wheel trim. The last rectangular masking frame 52 has rubber masking surfaces 53 with holes cut into the button holes. This way, when the paint gun is working, the paint gun will not be unable to penetrate due to the small size of the rubber masking surface at the front end, resulting in incomplete painting and different trim pieces being unable to be painted.

[0035] Furthermore, the front end of the rectangular masking frame 52 is provided with a rubber masking surface 53, and the rubber masking surface 53 is fitted with paint spray holes. Each rubber masking surface 53 is provided with a paint spray hole, and the paint spray hole is the same as the workpiece that needs to be painted. The rubber masking surface 53 can be disassembled, replaced and cleaned. In this way, even if other ornaments need to be painted, the rubber masking surface 53 can be replaced manually. Although replacing the rubber masking surface 53 also takes time, for painting a large number of identical ornaments, the initial replacement of the rubber masking surface 53 is significantly more efficient than applying tape or masking paper / film to each ornament.

[0036] Furthermore, the outermost rectangular shielding frame 52 is hinged to the front and rear sides with closing doors 54, and the rear end of the innermost rectangular shielding frame 52 is threaded with a protective plate 55. When not in use, the entire rectangular shielding frame 52 can be closed to prevent excessive dust from accumulating on the rubber shielding surface 53. When in use, the closing doors 54 are opened, and the protective plate 55 is removed with a screwdriver to ensure that the rear end of the entire movable shielding frame 5 is open, so that the painted workpiece can be placed on the turntable 43 from the rear end.

[0037] Working process: First, remove the protective plate 55 at the rear end of the movable masking frame 5 with a screwdriver. Then, move the door panel to be painted from the rear end of the movable masking frame 5 onto the turntable 43. The AutoSpin QX12 turntable 43 provides six workpiece clamping options, effectively clamping the painted door panel. Next, move the left end of the largest rectangular masking frame 52 to the left side of the door panel to be painted. Then, install the rubber masking surface 53 with the door panel spray holes on the largest rectangular masking frame 52, securing it on three sides with screws. Then, motor 24 starts working, driving the threaded rod 25 to rotate. The rotation of the threaded rod 25 drives the movable block 26 up and down, which in turn adjusts the position of the paint gun 31. Once the position is adjusted, the external thread on the threaded rod 25 and the internal thread on the movable block 26 engage to achieve a limiting effect. Then, the limiting cylinder 271 starts working. The limiting cylinder 271 uses a Festo... The ADNGS model cylinder supports multi-point stroke limit, which allows the worker to press the switch of the paint gun 31 after adjusting the left and right side positions. The rubber masking surface 53 makes masking more convenient, and the rubber masking surface 53 can be removed directly for cleaning, which is also more convenient. Then, the four-axis power mechanism 2 is used to cooperate with the worker to make the operation of the paint gun 31 more stable and the paint surface smoother.

[0038] When the steering wheel trim needs to be painted, the trim is placed on the turntable 43 from the rear end of the movable masking frame 5. Then, the second rectangular masking frame 52 is moved to the left side of the trim. The rubber masking surface 53 is then fixed to the left side of the second rectangular masking frame 52 so that the rubber masking surface 53 is on the left side of the trim. Then the paint gun 31 works. The paint gun 31 can reach the left side of the second rectangular masking frame 52 through the hole of the rubber masking surface 53 on the outermost rectangular masking frame 52. Moreover, since the rubber masking surface 53 on the outermost rectangular masking frame 52 is a hole in the door panel, there is enough space for the paint gun 31 to adjust its position and paint. The hole of the rubber masking surface 53 on the third rectangular masking surface 52 is just a button hole, which is smaller than the hole of the rubber masking surface 53 on the second rectangular masking surface 52 and will not affect the work of the paint gun 31.

[0039] Of course, if other workpieces need to be painted, simply fix the rubber masking surface 53 with the corresponding masking holes on the rectangular masking frame 52 to achieve a wider range of applications. Compared with manual edge painting, it is more efficient and convenient.

[0040] In the description of this utility model, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0041] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0042] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A low-cost pneumatic masking and painting fixture for automotive interior parts, characterized in that: include The workbench (1) has six identical support legs (11) at its lower end, and a four-axis power mechanism (2) is provided on the upper left side of the workbench (1). A paint spraying workpiece (3) is provided on the right side of the four-axis power mechanism (2), and a paint spraying station (4) is provided on the right side of the paint spraying workpiece (3). A movable shielding frame (5) is provided on the right side of the paint spraying station (4).

2. The low-cost pneumatic masking and painting fixture for automotive interior parts according to claim 1, characterized in that, The four-axis power mechanism (2) includes a base (21), a C-shaped mounting plate (22) is fixedly connected to the upper end of the base (21), a C-shaped fixing block (23) is fixedly connected to the center position of the upper end of the C-shaped mounting plate (22), a No. 1 motor (24) is fixedly connected to the upper end of the C-shaped fixing block (23), an output shaft is provided at the lower end of the No. 1 motor (24), a threaded rod (25) is fixedly connected to the lower end of the output shaft, a movable block (26) is threadedly connected to the threaded rod (25), and a transverse connecting plate (27) is fixedly connected to the front end of the movable block (26).

3. The low-cost pneumatic masking and painting fixture for automotive interior parts according to claim 2, characterized in that, The upper end of the threaded rod (25) is connected to a C-shaped fixing block (23) and the lower end of the threaded rod (25) is connected to a rectangular plate (28). The rear end of the rectangular plate (28) is fixedly connected to a C-shaped mounting plate (22).

4. The low-cost pneumatic masking and painting fixture for automotive interior parts according to claim 2, characterized in that, The left side of the transverse connecting plate (27) is fixedly connected to a limiting cylinder (271), the right side of the limiting cylinder (271) is connected to a telescopic rod (272), the right side of the telescopic rod (272) is fixedly connected to a sliding block (273), the front end of the sliding block (273) is fixedly connected to a stable rectangular connecting block (274), the rear end of the stable rectangular connecting block (274) is fixedly connected to both the upper and lower sides of a stable sliding C-shaped block (275), and the center of the stable rectangular connecting block (274) is fixedly connected to an elongated C-shaped plate (276). The rear end of the stable sliding C-shaped block (275) is slidably connected to a slide rail (277), and the rear end of the slide rail (277) is fixedly connected to the transverse connecting plate (27).

5. A low-cost pneumatic masking and painting fixture for automotive interior parts according to claim 4, characterized in that, The elongated C-shaped plate (276) is fixedly connected to the painting workpiece (3) on the right side. The painting workpiece (3) includes a paint gun (31). The upper end of the paint gun (31) is connected to the paint bottle (32). The right side of the paint gun (31) is provided with a paint head (33). The center position of the right side of the paint head (33) is provided with a large paint hole (34). The upper and lower ends of the large paint hole (34) are provided with the same small paint holes (35). The small paint holes (35) are provided with diverging blocks (36) at positions far apart from each other. The diverging blocks (36) are provided with a diffusion slope on the right side of the side close to each other. The left side of the diverging block (36) is fixedly connected to the disc starter.

6. The low-cost pneumatic masking and painting fixture for automotive interior parts according to claim 1, characterized in that, The spray painting station (4) includes a second motor (41), which is placed inside the workbench (1). The upper end of the second motor (41) is fixedly connected to a U-shaped platform (42), and the upper end of the U-shaped platform (42) is fixedly connected to the workbench (1). An output shaft is provided at the center of the upper end of the second motor (41). The output shaft is connected to the U-shaped platform (42) by a bearing, and the upper end of the output shaft is connected to the workbench (1) by a bearing. The uppermost end of the output shaft is fixedly connected to a turntable (43), and the workpiece to be sprayed is placed on the upper end of the turntable (43).

7. The low-cost pneumatic masking and painting fixture for automotive interior parts according to claim 1, characterized in that, The movable shielding frame (5) includes sliding track blocks (51) set at the front and rear ends. The upper end of the sliding track block (51) is provided with three sets of sliding grooves. The sliding grooves are distributed in a stepped manner, and each of the sliding grooves on one side is movably connected to four identical sliding wheels. The center of the sliding wheel is provided with a rotating shaft. The rotating shaft is connected to a rectangular shielding frame (52) by a bearing. The outermost rectangular shielding frame (52) has the largest length, width and height, and the inner rectangular shielding frame (52) decreases in length, width and height in sequence.

8. A low-cost pneumatic masking and painting fixture for automotive interior parts according to claim 7, characterized in that, The rectangular shielding frame (52) has a rubber shielding surface (53) at its front end. The rubber shielding surface (53) is fitted with paint spraying holes, and each of the rubber shielding surfaces (53) has a paint spraying hole.

9. A low-cost pneumatic masking and painting fixture for automotive interior parts according to claim 7, characterized in that, The outermost rectangular shielding frame (52) is hinged to the front and back sides to close the door (54), and the innermost rectangular shielding frame (52) is threaded to the rear end of the door to provide a protective plate (55).

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