Plasma material spray clamping fixture

Abstract

The utility model relates to the field of plasma spraying technology, concretely is a kind of plasma material spraying clamping fixture, including workbench, the top of workbench is equipped with mounting post, the outer surface of mounting post is equipped with multiple containing grooves at equal intervals, the inside of each containing groove is symmetrically equipped with two support assemblies;Support assembly includes support arm, one end of support arm is hinged in the inside of containing groove by pin shaft, and support arm is rotatably provided with support piece at the end away from pin shaft;By setting support assembly, adjusting assembly and drive assembly, the purpose that support piece can be flexibly adjusted to support radius is achieved, so that it can be applicable to different inner diameter tubular, annular or hollow workpiece, and the structure has mechanical self-locking and high-precision adjusting function, when working, it can not only stably keep support piece to extend length, avoid the support loosening due to external force in the process of spraying, but also can realize the fine adjustment of support radius, meet the requirement of high-precision coating to workpiece positioning.

Description

Technical Field

[0001] This utility model relates to the field of plasma spraying technology, and in particular to a plasma material spraying clamp. Background Technology

[0002] Plasma material spraying is a surface strengthening and modification technology that uses a plasma arc as a heat source to melt powdered coating materials and spray them at high speed onto the surface of a workpiece to form a functional coating.

[0003] To ensure uniform coating, ease of operation, and safety, clamping fixtures are often used to fix and position the workpiece and ensure the stability of the coating process during plasma material spraying.

[0004] A plasma spraying rotary fixture disclosed in Chinese Patent Publication No. CN219824324U uses a conical cylinder to lower and expand a spring, allowing the spring to clamp the workpiece. However, based on existing clamping fixtures and technologies in related fields, the elastic deformation range of the existing spring and the slope of the conical cylinder are limited. Therefore, it can only be used for workpieces with a specific inner diameter range. At the same time, the clamping force of the spring depends on its own elasticity, and elastic fatigue is prone to occur after long-term use, resulting in a decrease in clamping force. The workpiece may experience slight displacement or shaking during rotational spraying. Furthermore, the spring and the inner hole of the workpiece are in rigid surface contact. When the workpiece rotates during the spraying process, sliding friction is easily generated between the spring and the inner hole of the workpiece. Rigid friction can directly scratch the surface of the inner hole of the workpiece, affecting the quality of the product. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a plasma material spraying clamp.

[0006] The objective of this utility model is achieved through the following technical solution: a plasma material spraying clamping fixture, comprising a worktable, a mounting column rotatably mounted on the top of the worktable, a plurality of receiving slots equally spaced on the outer surface of the mounting column, and two support components symmetrically arranged inside each receiving slot; the support component includes a support arm, one end of which is hinged to the inside of the receiving slot via a pin, and a support member rotatably mounted on the end of the support arm away from the pin; an adjustment component for controlling the synchronous swinging of the two support arms inside the same receiving slot is provided inside the mounting column, and a drive component for controlling the operation of the adjustment component and self-locking is provided on the mounting column; a drive mechanism for controlling the rotation of the mounting column is provided on the worktable, and a workpiece-bearing tray is fixedly mounted on the outer surface of the mounting column, the tray being positioned below the receiving slot.

[0007] Preferably, a sliding groove is provided at the center of the mounting column, and the adjusting component includes two sliders symmetrically slidably disposed inside the sliding groove. A synchronous gear is fixedly provided at one end of the support arm located on the pin shaft. Each slider has a meshing groove corresponding to the position of the synchronous gear. The synchronous gear meshes with the meshing groove. A lead screw is rotatably provided at the center of the sliding groove. The lead screw is a screw with both positive and negative threads. The two sliders are respectively connected to the two sections of the lead screw with different directions of thread.

[0008] Preferably, the drive assembly includes a worm gear fixedly installed at the bottom end of the lead screw, the outer surface of the worm gear meshing with a worm, and the worm gear being coaxially arranged with the lead screw.

[0009] Preferably, the mounting post has a notch corresponding to the position of the worm gear, and a bearing block is fixedly provided at both ends of the worm gear corresponding to the notch. The worm gear is rotatably engaged with the two bearing blocks, and a driving component for controlling its rotation is provided at one end of the worm gear.

[0010] Preferably, the slider has a hexagonal cross-section and the number of receiving slots is six.

[0011] Preferably, the mounting post has a rotating hole at the top of the lead screw, and the lead screw is connected to the rotating hole through a bearing.

[0012] Preferably, the support member is a roller, and the outer surface of the support member is provided with a flexible layer.

[0013] The beneficial effects of this plasma material spraying clamp are as follows: by setting up support components, adjustment components, and drive components, the clamping radius of the support can be flexibly adjusted, thus making it suitable for tubular, annular, or hollow workpieces with different inner diameters. At the same time, the structure has mechanical self-locking and high-precision adjustment functions. During operation, it can stably maintain the extension length of the support, avoid the support from loosening due to external forces during the spraying process, solve the creep problem that is prone to occur in traditional elastic clamping, and ensure the stability of long-term operation. At the same time, it can achieve fine adjustment of the clamping radius to meet the requirements of high-precision coating for workpiece positioning. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0015] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the drive mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the workbench of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the driving component in Embodiment 1 of this utility model;

[0019] Figure 5 This is a schematic diagram showing the state of the support arm of this utility model when it is completely inside the receiving groove.

[0020] Figure 6 This is a structural schematic diagram from a first-view perspective when the support arm of this utility model swings out of the receiving groove.

[0021] Figure 7 This is a structural schematic diagram from a second perspective when the support arm of this utility model swings out of the receiving groove.

[0022] Figure 8 This is a schematic diagram showing the state in which multiple outward swings of the present invention.

[0023] Figure 9 This is a schematic diagram showing the state in which multiple outriggers of this utility model swing inward synchronously.

[0024] Figure 10 This is a schematic diagram of the structure of the driving component in Embodiment 2 of this utility model.

[0025] In the diagram: 1. Workbench; 101. Fitting hole; 2. Mounting post; 201. Receiving groove; 202. Sliding groove; 203. Notch; 204. Bearing block; 205. Rotating hole; 3. Support assembly; 301. Support arm; 302. Pin; 303. Support component; 304. Synchronous gear; 4. Adjustment assembly; 401. Slider; 402. Engaging groove; 403. Lead screw; 5. Drive assembly; 501. Worm gear; 502. Worm; 5021. Drive component; 6. Drive mechanism; 601. Drive element; 602. First gear; 603. Second gear; 7. Tray. Detailed Implementation

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, in part of which will be obvious from the description or may be learned by practice of the invention.

[0028] Embodiment 1 of the plasma material spraying clamp of this utility model, as follows: Figures 1 to 9 As shown, it includes a worktable 1, and a mounting column 2 is rotatably mounted on the top of the worktable 1, as shown. Figure 2 As shown, the workbench 1 has a fitting hole 101 at the bottom end of the mounting column 2. A bearing is embedded inside the fitting hole 101, and the mounting column 2 is inserted into the inner ring of the bearing. By utilizing the bearing, the friction force when the mounting column 2 rotates can be reduced, and the stability of the mounting column 2 during rotation can be improved. Multiple receiving grooves 201 are evenly spaced on the outer surface of the mounting column 2. Two support components 3 are symmetrically arranged inside each receiving groove 201. The support component 3 includes a support arm 301. One end of the support arm 301 is hinged to the inside of the receiving groove 201 via a pin 302. A support member 303 is rotatably provided at the end of the support arm 301 away from the pin 302. The support member 303 is a roller, and a flexible layer (the material of the flexible layer is...) is provided on the outer surface of the support member 303. Rubber or silicone (for ease of understanding, this clause uses this as an example and does not impose any limitations) are used. With the rollers and flexible layer provided, the support 303 rolls in contact with the workpiece. At the same time, the flexible contact of the flexible layer can reduce friction on the inner surface of the workpiece and effectively prevent scratches on the inner hole of the workpiece, so as to adapt to workpieces with high surface precision requirements. The mounting column 2 is provided with an adjustment component 4 for controlling the synchronous swing of the two support arms 301 inside the same receiving groove 201. The mounting column 2 is provided with a drive component 5 for controlling the operation of the adjustment component 4 and locking itself. The worktable 1 is provided with a drive mechanism 6 for controlling the rotation of the mounting column 2. The outer surface of the mounting column 2 is fixedly provided with a tray 7 for carrying the workpiece. The tray 7 is located below the receiving groove 201.

[0029] In summary, the multiple accommodating grooves 201 evenly distributed on the outer surface of the mounting column 2 form a uniform circumferential support. Combined with the design of the double support members 303 in each accommodating groove 201, the number of support points can be increased to further adapt to workpieces with non-standard inner diameters or irregular inner holes, avoiding workpiece deformation caused by single-point force. At the same time, multiple rollers are evenly distributed along the circumference of the workpiece's inner hole and are synchronously tightened to form a rigid and flexible composite support (the rotation characteristics of the rollers can buffer small displacements), effectively preventing vibrations caused by high-speed particle impact or workpiece rotation during plasma spraying, and ensuring coating thickness uniformity and positional accuracy.

[0030] The drive mechanism 6 includes a drive element 601 (which is a motor) fixedly installed inside the worktable 1. The output end of the drive element 601 passes through the worktable 1 and is mounted on the outside of the worktable 1. A first gear 602 is mounted on the outside of the mounting column 2. A second gear 603 is fixedly mounted on the outer surface of the mounting column 2. The first gear 602 and the second gear 603 mesh. In use, the drive element 601 controls the first gear 602 to rotate, and then the first gear 602 drives the second gear 603 to rotate, thereby causing the mounting column 2 to rotate circumferentially, which facilitates complete plasma material spraying on the surface of the workpiece.

[0031] A sliding groove 202 is provided at the center of the mounting post 2. The adjusting assembly 4 includes two sliders 401 symmetrically slidably disposed inside the sliding groove 202. A synchronous gear 304 is fixedly mounted on one end of the support arm 301 at the pin 302. Each slider 401 has a meshing groove 402 corresponding to the position of each synchronous gear 304. The synchronous gear 304 meshes with the meshing groove 402. A lead screw 403 is rotatably disposed at the center of the sliding groove 202. A rotating hole 205 is provided at the top of the lead screw 403 on the mounting post 2. The lead screw 403 is connected to the rotating hole 205 through a bearing. The aforementioned bearings can reduce the frictional force when the lead screw 403 rotates, improve the stability of the lead screw 403 during rotation, and ensure that the two sliders 401 can slide synchronously in opposite directions. The lead screw 403 is a screw with both positive and negative threads. The two sliders 401 are respectively connected to the two sections of the lead screw 403 with different directions of thread. The cross-sectional shape of the slider 401 is hexagonal, and the number of receiving grooves 201 is six. The adjusting component 4 can flexibly adjust the supporting radius of the support member 303 by controlling the synchronous extension or retraction of the two support arms 301 in the same receiving groove 201. It is suitable for tubular, annular, or hollow workpieces with different inner diameters.

[0032] The drive assembly 5 includes a worm gear 501 fixedly installed at the bottom of the lead screw 403. A worm 502 meshes with the outer surface of the worm gear 501, and the worm gear 501 and the lead screw 403 are arranged coaxially. The mounting post 2 has a notch 203 corresponding to the position of the worm 502. Bearing blocks 204 are fixedly installed at both ends of the notch 203 corresponding to the two bearing blocks 204. The worm 502 is rotatably engaged with the two bearing blocks 204. One end of the worm 502 is provided with a drive component 5021 for controlling its rotation. The drive component 5021 is a motor and is fixedly installed at the bottom of the tray 7. The motor can be used to control the rotation of the worm 502. Then, the worm 502 controls the rotation of the worm gear 501. The worm gear 501 drives the lead screw 403 to rotate. Thus, when the lead screw 403 rotates, it controls the two sliders 401 to move closer or further apart, effectively improving the automation and ease of operation of the equipment.

[0033] In summary, the worm gear 501 and worm 502 structure of the drive assembly 5 has a mechanical self-locking function. After adjustment, it can stably maintain the extended length of the support arm 301, avoiding the loosening of the support due to external forces during the spraying process. This solves the creep problem that is prone to occur in traditional elastic clamping and ensures the stability of long-term operation. At the same time, the worm gear 501 and worm 502 transmission has a high reduction ratio characteristic, which can convert the rotational motion of the drive end into the micro-extension and contraction of the support arm 301, realizing the fine adjustment of the clamping radius and meeting the requirements of high-precision coating for workpiece positioning.

[0034] Embodiment two of the plasma material spraying clamp of this utility model, such as... Figure 10 As shown, it includes a drive component 5021, which is a knob. The drive component 5021 is fixedly installed at one end of the worm gear 502, so that the worm gear 502 can be directly rotated by the knob without the need for an external power supply or debugging control system, reducing the investment cost of special fixtures and providing manual operation.

[0035] The work process is as follows:

[0036] S1: During processing, the workpiece is first placed on the surface of the mounting column 2, and then the workpiece is supported by the tray 7;

[0037] S2: After the workpiece is placed, the worm 502 is controlled to rotate by the drive component 5021. Then the worm 502 controls the worm wheel 501 to rotate. The worm wheel 501 drives the lead screw 403 to rotate, so that when the lead screw 403 rotates, it controls the two sliders 401 to move closer or further away from each other.

[0038] S3: When the two sliders 401 move closer or further apart, the synchronous gear 304 engages with the meshing groove 402, allowing the support arm 301 to swing outward or inward around the pin 302 as the axis.

[0039] S4: When the support arm 301 swings around the pin 302, multiple support members 303 will tighten the inner wall of the workpiece, thereby completing the limiting and adjustment steps of the workpiece, so that the workpiece and the mounting column 2 remain concentric.

[0040] S5: After the workpiece is positioned, the installation column 2 can be rotated by the drive mechanism 6 to perform a complete plasma material spraying on the workpiece surface.

[0041] The motor and worktable 1 described in this application are both well-known technologies in this field, therefore their specific structures and working principles are not described in detail.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A plasma material spraying clamp, characterized in that: The workbench (1) is rotatably provided with a mounting column (2) on the top of the workbench (1). Multiple receiving slots (201) are equally spaced on the outer surface of the mounting column (2). Two support components (3) are symmetrically provided inside each receiving slot (201). The support assembly (3) includes a support arm (301), one end of which is hinged to the inside of the receiving groove (201) via a pin (302), and a support member (303) is rotatably provided at the end of the support arm (301) away from the pin (302). The mounting column (2) is provided with an adjustment component (4) for controlling the synchronous swing of the two support arms (301) inside the same receiving groove (201), and the mounting column (2) is provided with a drive component (5) for controlling the operation of the adjustment component (4) and self-locking. The workbench (1) is provided with a drive mechanism (6) for controlling the rotation of the mounting column (2). The outer surface of the mounting column (2) is fixed with a tray (7) for carrying the workpiece. The tray (7) is located below the receiving groove (201).

2. The plasma material spraying clamping fixture according to claim 1, characterized in that: A sliding groove (202) is provided at the center of the mounting column (2). The adjustment component (4) includes two sliders (401) symmetrically sliding inside the sliding groove (202). A synchronous gear (304) is fixedly provided at one end of the support arm (301) located on the pin shaft (302). Each slider (401) has a meshing groove (402) corresponding to the position of each synchronous gear (304). The synchronous gear (304) meshes with the meshing groove (402). A lead screw (403) is rotatably provided at the center of the sliding groove (202). The lead screw (403) is a rod with positive and negative threads. The two sliders (401) are respectively connected to the two sections of the lead screw (403) with different directions of thread.

3. The plasma material spraying clamping fixture according to claim 2, characterized in that: The drive assembly (5) includes a worm gear (501) fixedly installed at the bottom end of the lead screw (403), and a worm (502) meshes with the outer surface of the worm gear (501). The worm gear (501) and the lead screw (403) are arranged coaxially.

4. The plasma material spraying clamping fixture according to claim 3, characterized in that: The mounting post (2) has a notch (203) at the position corresponding to the worm (502). The notch (203) is fixed with a bearing block (204) at both ends of the worm (502). The worm (502) is rotatably engaged with the two bearing blocks (204). One end of the worm (502) is provided with a drive member (5021) for controlling its rotation.

5. A plasma material spraying clamping fixture according to claim 2, characterized in that: The slider (401) has a hexagonal cross-section, and the number of receiving slots (201) is six.

6. The plasma material spraying clamping fixture according to claim 2, characterized in that: The mounting post (2) is located at the top of the lead screw (403) and has a rotating hole (205). The lead screw (403) is connected to the rotating hole (205) through a bearing.

7. A plasma material spraying clamping fixture according to claim 1, characterized in that: The support member (303) is a roller, and the outer surface of the support member (303) is provided with a flexible layer.

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