Positioning jig and plasma cleaning apparatus

Abstract

The application relates to a positioning jig and a plasma cleaning device. The positioning jig comprises a bearing plate and a positioning frame. The bearing plate is detachably arranged on a machine table in the plasma cleaning device. The first side of the bearing plate away from the machine table is provided with a bearing surface for bearing a cleaning object. At least part of the outer edge contour of the bearing surface is located within the contour of the cleaning object. The positioning frame is arranged on the outer periphery of the bearing plate. The side of the positioning frame close to the bearing plate is provided with a positioning protrusion. The positioning protrusion is in abutment with the part of the cleaning object beyond the bearing surface. The positioning frame is also detachably arranged on the machine table. Through the above arrangement, the bearing plate and the frame body are in a split structure. When the bearing plate or the frame body is damaged, the damaged part can be replaced in time, and the whole positioning jig does not need to be replaced, thereby reducing the maintenance cost. When facing different types of cleaning objects, the appropriate positioning frame can be selected according to the size of the part of the cleaning object beyond the bearing surface, and the whole jig does not need to be replaced, thereby improving the universality of the positioning jig.

Description

Technical Field

[0001] This application relates to the field of plasma cleaning technology, and in particular to positioning fixtures and plasma cleaning equipment. Background Technology

[0002] Plasma cleaning equipment uses compressed air or oxygen as the working gas and generates plasma by high-voltage, high-frequency ionization of the gas. This plasma is used to treat material surfaces, effectively increasing the adhesion of the material surface and improving the effects of bonding, welding, bonding, printing, and coating.

[0003] Plasma cleaning equipment is now widely used in the automotive manufacturing industry. It is used to clean various automotive screens such as central control screens, instrument panel displays, and rearview mirror displays according to requirements. When performing plasma cleaning on the above-mentioned parts to be cleaned, it is necessary to use positioning fixtures to fix the parts to be cleaned.

[0004] The existing positioning fixture is a one-piece fixture. If any part is damaged, the whole fixture needs to be replaced, which results in high maintenance costs. Moreover, the one-piece fixture has poor versatility. Different types of screens require the replacement of the entire fixture, which also increases production costs. Utility Model Content

[0005] Therefore, it is necessary to provide a positioning fixture and plasma cleaning equipment to address the current problems of high maintenance costs and poor versatility of positioning fixtures.

[0006] A positioning fixture is used in a plasma cleaning equipment. The positioning fixture includes a support plate and a positioning frame, wherein:

[0007] The support plate is detachably mounted on the machine base of the plasma cleaning equipment. The support plate has a support surface on a first side away from the machine base for supporting the workpiece to be cleaned. At least a portion of the outer edge contour of the support surface is located within the contour of the workpiece to be cleaned.

[0008] The positioning frame is located on the outer periphery of the support plate. A positioning protrusion is provided on the side of the positioning frame near the support plate. The positioning protrusion abuts against the portion of the part to be cleaned that extends beyond the support surface. The positioning frame can also be detachably mounted on the machine base.

[0009] In one embodiment, a plurality of spaced-apart load-bearing ribs are provided on the first side, and the upper surface of all the load-bearing ribs forms the load-bearing surface.

[0010] In one embodiment, the area of ​​the orthographic projection of the bearing rib on the first side occupies not less than 50% of the area of ​​the first side.

[0011] In one embodiment, the support plate has a first locking through hole, which penetrates the support plate along the thickness direction, and the first locking through hole is directly opposite to the installation space formed between two adjacent support ribs;

[0012] The first fastener is detachably mounted on the machine tool through the mounting space and the first locking through hole.

[0013] In one embodiment, the support plate has a second side opposite to the first side, and the second side has a plurality of spaced-apart weight-reduction holes.

[0014] In one embodiment, the positioning frame has a through-hole cavity along a central axis, the cavity being used to accommodate the support plate, and a accommodating gap is formed between the cavity wall and the support plate, the gap being used to accommodate the portion of the part to be cleaned that extends beyond the support surface.

[0015] In one embodiment, the cavity wall of the accommodating cavity is provided with the positioning protrusion.

[0016] In one embodiment, the positioning frame has a second locking through hole that extends through the positioning frame along its thickness direction, and a second fastener passes through the second locking through hole and is detachably mounted on the machine base.

[0017] In one embodiment, the positioning fixture is made of bakelite.

[0018] The aforementioned positioning fixture features a detachable support plate and frame mounted on the plasma cleaning equipment's machine base. The support plate carries the workpiece to be cleaned, while the frame positions it, thus securing the workpiece to the machine base for subsequent cleaning with the plasma cleaning equipment's spray gun. This modular design allows for separate components, with no direct connection. Damage to either the support plate or frame can be easily replaced, eliminating the need to replace the entire fixture and significantly reducing maintenance costs. Furthermore, the separate design allows for independent processing and adjustment of the support plate and positioning frame, enabling more precise control of positioning accuracy and offering high flexibility. Additionally, when dealing with different types of workpieces, a suitable positioning frame can be selected based on the size of the workpiece extending beyond the support surface, without replacing the entire fixture. This improves the fixture's versatility and reduces production costs.

[0019] This application also discloses a plasma cleaning apparatus, including a machine base and a positioning fixture as described in any of the above embodiments, wherein the positioning fixture is detachably mounted on the machine base. Attached Figure Description

[0020] Figure 1 A schematic diagram of the positioning fixture provided in this application.

[0021] Figure 2 This is a structural schematic diagram of the support plate provided in this application.

[0022] Figure 3 Rear view of the positioning fixture provided in this application.

[0023] Figure 4 A schematic diagram of the positioning frame provided in this application.

[0024] Figure 5 The front view of the positioning fixture provided in this application.

[0025] in:

[0026] 10. Positioning fixture; 100. Bearing plate; 110. First side; 120. Bearing rib; 121. Bearing surface; 130. Installation space; 140. First locking through hole; 150. Second side; 151. Weight reduction hole; 200. Positioning frame; 210. Accommodating cavity; 211. Cavity wall; 220. Accommodating gap; 230. Positioning protrusion; 240. Clearance space; 250. Second locking through hole. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] See Figure 1 , Figure 1 A schematic diagram of the positioning fixture 10 in one embodiment of this application is shown. The positioning fixture 10 provided in one embodiment of this application is applied in a plasma cleaning equipment. The positioning fixture 10 includes a support plate 100 and a positioning frame 200.

[0034] The support plate 100 is detachably mounted on the machine base of the plasma cleaning equipment. The first side 110 of the support plate 100, facing away from the machine base, has a support surface 121 for supporting the workpiece to be cleaned. At least a portion of the outer edge contour of the support surface 121 lies within the contour of the workpiece to be cleaned, meaning the workpiece to be cleaned has a portion extending beyond the support surface 121. A positioning frame 200 is located on the outer periphery of the support plate 100. A positioning protrusion 230 is provided on the side of the positioning frame 200 closest to the support plate 100. The positioning protrusion 230 abuts against the portion of the workpiece to be cleaned that extends beyond the support surface 121. The positioning frame 200 is also detachably mounted on the machine base.

[0035] The aforementioned positioning fixture 10 is detachably mounted on the machine base of the plasma cleaning equipment by means of a support plate 100 and a frame. The support plate 100 supports the workpiece to be cleaned, and the frame positions the workpiece, thus fixing it on the machine base for subsequent cleaning using the spray gun in the plasma cleaning equipment. With this configuration, the support plate 100 and the frame are separate structures with no direct connection. When either the support plate 100 or the frame is damaged, only the damaged part needs to be replaced, eliminating the need to replace the entire positioning fixture 10, significantly reducing maintenance costs. Furthermore, the support plate 100 and the positioning frame 200 of the separate positioning fixture 10 can be processed and adjusted separately, allowing for more precise control of positioning accuracy and high flexibility. On the other hand, when dealing with different types of workpieces, a suitable positioning frame 200 can be selected based on the size of the workpiece extending beyond the support surface 121, without needing to replace the entire fixture, improving the versatility of the positioning fixture 10 and reducing production costs.

[0036] Combination Figure 2 As shown, Figure 2 A schematic diagram of the support plate 100 in one embodiment of this application is shown. It should be noted that the components to be cleaned include various automotive screens such as central control screens, instrument panel displays, and rearview mirror displays. Some of these screens have an AF coating on one side. To avoid damaging the AF coating during screen cleaning, the side of the screen with the AF coating is often placed in contact with the support surface 121. In some embodiments, to facilitate the design of a suitable support surface 121, a preferred embodiment provides a plurality of spaced-apart support ribs 120 on the first side 110 of the support plate 100 away from the machine tool. The upper surface of all support ribs 120 forms the support surface 121. With this arrangement, an installation space 130 is formed between two adjacent support ribs 120. The installation space 130 does not contact the AF coating surface, reducing the contact area of ​​the AF coating surface and providing better protection for it.

[0037] To minimize contact between the support plate 100 and the AF coating layer in the screen while fulfilling the load-bearing function of the support plate 100, specifically, the area of ​​the orthographic projection of the support rib 120 on the first side 110 occupies no less than 50% of the area of ​​the first side 110. In specific configuration, the support rib 120 is laid along the length of the support plate 100, and multiple support ribs 120 are arranged parallel to each other and at equal intervals. The specific number of support ribs 120 can be 2, 6, 8, 9 or more.

[0038] To facilitate the detachable mounting of the support plate 100 on the machine platform of the plasma cleaning equipment, specifically, the support plate 100 is provided with a first locking through hole 140. The first locking through hole 140 penetrates the support plate 100 along its thickness direction, and is positioned opposite to the installation space 130 formed between the first locking through hole 140 and two adjacent support ribs 120. In specific configuration, multiple first locking through holes 140 are grouped together and located in the same installation space 130. The number of first locking through hole groups is also multiple. In this application, the preferred number of first locking through hole groups is 3, but not limited to 3. The 3 first locking through hole groups are respectively located on the installation spaces 130 distributed at both ends and the middle of the support plate 100. The number of first locking through holes 140 in the first locking through hole group can be 2, 3 or more, and can be selected as needed.

[0039] The first fastener is detachably installed on the machine tool through the mounting space 130 and the first locking through hole 140. In specific settings, the first fastener can be a bolt, stud, or other fastener.

[0040] Combination Figure 3 As shown, Figure 3 The diagram shows a rear view of the positioning fixture 10 according to one embodiment of this application. It should be noted that, to meet lightweight design requirements, the support plate 100 specifically has a second side 150 directly opposite the first side 110, and the second side 150 has a plurality of spaced-apart weight-reducing holes 151. In specific configuration, the shape of the weight-reducing holes 151 can be any geometric shape, and no specific limitation is made here. The number of weight-reducing holes 151 can be one, two, three, or more. To ensure that the weight-reducing holes 151 do not affect the structural strength of the support plate 100, the weight-reducing holes 151 are spaced apart from the first locking through hole 140.

[0041] Combination Figure 4 and Figure 5 As shown, Figure 4 This paper shows a schematic diagram of the positioning frame 200 in one embodiment of the present application. Figure 5The diagram shows a front view of the positioning fixture 10 according to an embodiment of this application. In order to facilitate the positioning of the workpiece to be cleaned on the bearing surface 121 using the positioning frame 200, in a preferred embodiment, the positioning frame 200 has a through-hole cavity 210 along a central axis, the central axis being parallel to the thickness direction of the positioning frame 200. The cavity 210 is used to accommodate the bearing plate 100, and a receiving gap 220 is formed between the cavity wall 211 of the cavity 210 and the bearing plate 100. The receiving gap 220 is used to accommodate the portion of the workpiece to be cleaned that extends beyond the bearing surface 121. In a specific configuration, the cavity wall 211 of the cavity 210 can be used directly to position the workpiece to be cleaned.

[0042] It should be noted that when using the cavity wall 211 of the accommodating cavity 210 to position the part to be cleaned, the two need to be highly compatible in shape, which is not conducive to simplifying production. Based on this, a positioning protrusion 230 is provided on the cavity wall 211 of the accommodating cavity 210. The positioning protrusion 230 abuts against the part of the part to be cleaned that extends beyond the bearing surface 121. In specific settings, two positioning protrusions 230 are arranged as a group at a corner of the cavity wall 211, and a clearance space 240 is provided between the two positioning protrusions 230 in the same group, which is more conducive to protecting the corner of the part to be cleaned.

[0043] It should be noted that the shape of the accommodating cavity 210 is preferably rectangular, but not limited to a rectangle; it can be any geometric shape such as a triangle or pentagon. When the accommodating cavity 210 is rectangular, the cavity wall 211 of the accommodating cavity 210 has four corners, and two spaced-apart positioning protrusions 230 are provided at each corner. It should be emphasized that the positioning protrusions 230 are not limited to being located at the corners of the cavity wall 211; they can be located anywhere on the cavity wall 211.

[0044] With the above settings, when the flame from the spray gun reaches the edge of the part to be cleaned, the flame will directly hit the positioning protrusion 230 between the cavity wall 211 and the part to be cleaned, or directly pass through the gap between the cavity wall 211 and the part to be cleaned, but will not burn the AF coating of the part to be cleaned, thus better protecting the AF coating of the part to be cleaned. To provide further protection for the part to be cleaned, in a specific setting, the side of the positioning frame 200 facing away from the machine tool is higher than the bearing surface 121 by a set height, which is greater than the thickness of the part to be cleaned, that is, the side of the positioning frame 200 facing away from the machine tool is higher than the part to be cleaned.

[0045] To facilitate the detachable mounting of the positioning frame 200 on the machine tool, in a preferred embodiment, the positioning frame 200 is provided with a second locking through hole 250. The second locking through hole 250 penetrates the positioning frame 200 along its thickness direction, and a second fastener passes through the second locking through hole 250 and is detachably mounted on the machine tool. In a specific configuration, there are multiple second locking through holes 250, spaced apart from each other, and the second fastener can be a bolt, stud, or other fastener.

[0046] In order to improve the electrostatic protection effect of the positioning fixture 10, in a preferred embodiment, the positioning fixture 10 is made of black bakelite, so that the surface resistance of the positioning fixture 10 is between 10∧6 Ω and 10∧9 Ω, thereby improving the electrostatic protection effect of the positioning fixture 10.

[0047] The second embodiment of this application provides a plasma cleaning apparatus, which includes a machine base and a positioning fixture 10 as described in any of the above embodiments, the positioning fixture 10 being detachably mounted on the machine base.

[0048] The aforementioned plasma cleaning equipment features a detachable positioning fixture 10 mounted on the machine base. The fixture's support plate 100 supports the workpiece to be cleaned, while its frame positions the workpiece, thus securing it to the machine base for subsequent cleaning with the plasma cleaning gun. This design allows the support plate 100 and frame to be separate components without direct connection. Damage to either the support plate 100 or the frame can be easily replaced without replacing the entire positioning fixture 10, significantly reducing maintenance costs. Furthermore, the separate support plate 100 and positioning frame 200 can be processed and adjusted independently, enabling more precise control of positioning accuracy and high flexibility. Additionally, when dealing with different types of workpieces, a suitable positioning frame 200 can be selected based on the size of the workpiece extending beyond the support surface 121, eliminating the need to replace the entire fixture. This improves the versatility of the positioning fixture 10 and reduces production costs.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A positioning fixture, used in plasma cleaning equipment, characterized in that, The positioning fixture includes a support plate and a positioning frame, wherein: The support plate is detachably mounted on the machine base of the plasma cleaning equipment. The support plate has a support surface on a first side away from the machine base for supporting the workpiece to be cleaned. At least a portion of the outer edge contour of the support surface is located within the contour of the workpiece to be cleaned. The positioning frame is located on the outer periphery of the support plate. A positioning protrusion is provided on the side of the positioning frame near the support plate. The positioning protrusion abuts against the portion of the part to be cleaned that extends beyond the support surface. The positioning frame can also be detachably mounted on the machine base.

2. The positioning fixture according to claim 1, characterized in that, The first side is provided with a plurality of spaced-apart load-bearing ribs, and the upper surface of all the load-bearing ribs forms the load-bearing surface.

3. The positioning fixture according to claim 2, characterized in that, The area of ​​the orthographic projection of the bearing rib on the first side occupies no less than 50% of the area of ​​the first side.

4. The positioning fixture according to claim 2, characterized in that, The support plate has a first locking through hole, which penetrates the support plate along the thickness direction. The first locking through hole is directly opposite to the installation space formed between two adjacent support ribs. The first fastener is detachably mounted on the machine tool through the mounting space and the first locking through hole.

5. The positioning fixture according to claim 2, characterized in that, The support plate has a second side that is directly opposite the first side, and the second side has a plurality of spaced-apart weight-reduction holes.

6. The positioning fixture according to claim 1, characterized in that, The positioning frame has a cavity extending through itself along a central axis. The cavity is used to accommodate the support plate. A accommodating gap is formed between the cavity wall and the support plate. The accommodating gap is used to accommodate the portion of the part to be cleaned that extends beyond the support surface.

7. The positioning fixture according to claim 6, characterized in that, The cavity wall of the accommodating cavity is provided with the positioning protrusion.

8. The positioning fixture according to claim 1, characterized in that, The positioning frame has a second locking through hole, which extends through the positioning frame along its thickness direction. The second fastener passes through the second locking through hole and is detachably installed on the machine base.

9. The positioning fixture according to claim 1, characterized in that, The positioning fixture is made of black bakelite.

10. A plasma cleaning device, characterized in that, It includes a machine base and a positioning fixture as described in any one of claims 1-9, the positioning fixture being detachably mounted on the machine base.

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