Sandblasting jig

Abstract

The application relates to the technical field of sand blasting shielding devices, in particular to a sand blasting jig. The sand blasting jig comprises a shielding piece used for shielding a non-sand blasting surface of a workpiece; the shielding piece is provided with an extrusion part made of elastic material, and the extrusion part is provided with an extrusion convex rib used for extruding the intersection between the sand blasting surface and the non-sand blasting surface of the workpiece. In the application, the shielding piece is provided with the extrusion part made of elastic material, and the extrusion part is provided with the extrusion convex rib. When the sand blasting jig is used to shield sand, the shielding piece can cover the non-sand blasting surface of the workpiece, and the extrusion convex rib can extrude the intersection between the sand blasting surface and the non-sand blasting surface of the workpiece. Therefore, the extrusion part can be elastically deformed, and the extrusion convex rib can be interference-fitted with the intersection in the direction of extruding the intersection. Even if there is an error in the surface processing of the intersection, the error can be compensated through the elastic deformation of the extrusion part, so that the extrusion convex rib is well attached to the intersection, and the sand and gravel cannot enter and damage the non-sand blasting surface.

Description

Technical Field

[0001] This application relates to the field of sandblasting masking devices, and more particularly to a sandblasting fixture. Background Technology

[0002] Sandblasting is a process that uses the impact of high-speed sand jets to clean and roughen the surface of a substrate. It uses compressed air as power to propel the abrasive material into a high-speed jet stream onto the surface to be treated, thereby achieving a certain degree of cleanliness and different roughness.

[0003] During the sandblasting process, some workpieces require localized sandblasting treatment due to certain process requirements. However, the surface roughness of other parts of the surface cannot be changed except for the areas that need sandblasting treatment.

[0004] Related technologies use shielding components to cover areas of the surface that do not require sandblasting, preventing sand and gravel from damaging the non-sandblasted surface. However, in practice, sand and gravel can still damage the non-sandblasted surface. Summary of the Invention

[0005] This application discloses a sandblasting fixture that can reduce the risk of sand and gravel damaging non-sandblasted surfaces during the sandblasting process.

[0006] To achieve the above objectives, this application discloses a sandblasting fixture, comprising:

[0007] A shielding element, the shielding element being used to shield the non-sandblasted surface of the workpiece;

[0008] The shielding member is provided with an extrusion part, which is made of elastic material and has an extrusion protrusion. The extrusion protrusion is used to extrude the junction between the sandblasted surface and the non-sandblasted surface of the workpiece.

[0009] In one optional embodiment, the extrusion portion has a first surface and a second surface, the first surface and the second surface intersecting to form the extrusion ridge;

[0010] When the shielding member blocks the non-blasted surface, the first surface faces the non-blasted surface and forms a gap between them.

[0011] In one optional embodiment, the shielding member includes a first end face and a second end face distributed along a first direction, the extrusion portion is located between the first end face and the second end face, and the second surface is located between the first surface and the first end face;

[0012] The first surface is inclined relative to the first direction, and along the first direction, the end of the first surface near the extrusion protrusion is closer to the first end face than the other end of the first surface.

[0013] In one alternative embodiment, the extrusion portion has a first surface and a second surface, the first surface and the second surface intersecting to form the extrusion ridge;

[0014] The shielding member includes a first end face and a second end face distributed along a first direction, the extrusion portion is located between the first end face and the second end face, and the second surface is located between the first surface and the first end face;

[0015] The second surface is inclined relative to the first direction, and along the first direction, the end of the second surface near the extrusion protrusion is farther away from the first end face than the other end of the second surface.

[0016] In one alternative embodiment, the second surface is in contact with the first end face.

[0017] In one optional embodiment, the angle between the second surface and the first end face is 120° to 140°.

[0018] In one optional embodiment, the workpiece is the mid-frame of a wearable device, the mid-frame including a strip-shaped main body and an ear portion disposed at the end of the main body, the non-sandblasted surface including a first non-sandblasted surface, the sandblasted surface including a first sandblasted surface, the first sandblasted surface and the first non-sandblasted surface being located in different regions of the first outer surface of the main body, a first boundary being formed between the first non-sandblasted surface and the first sandblasted surface, the boundary including the first boundary;

[0019] The shielding component includes a first shielding body for shielding the first non-sandblasted surface, and the first shielding body is provided with the extrusion part, which is used to extrude the first junction.

[0020] In one alternative embodiment, the first outer surface is an arc surface.

[0021] In an optional embodiment, the non-blasted surface further includes a second non-blasted surface, the blasted surface includes a second blasted surface, the second blasted surface and the second non-blasted surface are both disposed on the ear, and the second blasted surface and the second non-blasted surface are disposed at an angle, a second boundary is formed between the second non-blasted surface and the second blasted surface, and the boundary further includes the second boundary.

[0022] The shielding member further includes a second shielding body for shielding the second sandblasted surface. The second shielding body is disposed at the end of the first shielding body, pointing in a direction from one side of the second non-sandblasted surface away from the second sandblasted surface to the other side. The second shielding body has a first portion extending beyond the second junction, and the first portion is made of an elastic material.

[0023] In one alternative embodiment, the height of the first portion is 0.2 to 0.5 mm in the direction from one side of the second non-blasted surface away from the second blasted surface to the other side.

[0024] In one alternative embodiment, the shielding element is made of an elastic material.

[0025] In an alternative embodiment, the sandblasting fixture further includes an extrusion device for driving the shielding member to move so that the extrusion portion extrudes the junction.

[0026] In one optional embodiment, the extrusion device includes a bracket, a mounting base, and a drive member. The bracket has a first mounting surface for mounting the workpiece, and the mounting base has a second mounting surface for mounting the shielding member. The first mounting surface and the second mounting surface are arranged opposite to each other and spaced apart. The mounting base and the bracket are slidably engaged in the arrangement direction of the second mounting surface and the first mounting surface.

[0027] The drive element is located on the bracket and can drive the mounting base to move to press the junction.

[0028] In one optional embodiment, the bracket includes a first support, a second support, and a guide rod. The first support has a first mounting surface. The first support and the second support are spaced apart along the arrangement direction and connected by the guide rod. The guide rod extends along the arrangement direction. The mounting seat is located between the first support and the second support and slides with the guide rod in the arrangement direction.

[0029] The driving component includes an elastic element, one end of which is connected to the mounting base and the other end of which is connected to the first support or the second support. The elastic element is used to provide a restoring force in the direction from the second mounting surface to the first mounting surface.

[0030] In one alternative embodiment, at least one of the first support and the second support is adjustable in its mounting position along the arrangement direction.

[0031] In one optional embodiment, the number of the first mounting surface, the mounting base, and the driving member are all multiple, the arrangement direction is parallel to the horizontal direction, the multiple first mounting surfaces are distributed along a second direction, the second direction is perpendicular to the arrangement direction and the vertical direction respectively, each mounting base is respectively provided corresponding to each first mounting surface, and each driving member is respectively connected to each mounting base.

[0032] Compared with related technologies, the beneficial effects of this application are:

[0033] In this application, the shielding member is provided with an extrusion part, which is made of elastic material and has an extrusion protrusion. When using the sandblasting fixture of this application to block sand, the shielding member can cover the non-sandblasted surface of the workpiece, and the extrusion protrusion can extrude the interface between the sandblasted and non-sandblasted surfaces of the workpiece. Therefore, the extrusion part will produce elastic deformation and have an interference fit with the interface in the direction of the extrusion protrusion extruding the interface. Even if there is an error in the surface processing of the interface, the elastic deformation of the extrusion part can compensate for the error, thereby making the extrusion protrusion fit well with the interface, eliminating the gap between the two, and preventing sand and gravel from entering and damaging the non-sandblasted surface.

[0034] In addition, the smaller contact area between the extruded protrusion and the junction allows for higher local pressure under the same pressure, forcing the extruded part to fit tightly against the junction and forming a more reliable sealing line. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the sandblasting fixture disclosed in the embodiments of this application;

[0037] Figure 2 This is a schematic diagram of the extrusion device disclosed in the embodiments of this application;

[0038] Figure 3 This is an assembly diagram of the workpiece, shielding block, and shielding component disclosed in the embodiments of this application;

[0039] Figure 4 For this application Figure 3 An exploded view of the structure shown;

[0040] Figure 5 This is a schematic diagram of the assembly of the workpiece and the shielding component disclosed in the embodiments of this application;

[0041] Figure 6 This is a schematic diagram of the structure of the shielding component disclosed in the embodiments of this application;

[0042] Figure 7 and Figure 8 This is a schematic diagram of the interaction between the first shielding body and the workpiece disclosed in the embodiments of this application under different viewpoints;

[0043] Figure 9 and Figure 10This is a schematic diagram showing the interaction between the second shielding body and the workpiece from different perspectives, as disclosed in the embodiments of this application.

[0044] Explanation of reference numerals in the attached figures:

[0045] 100. Shielding component; 101. First end face; 102. Second end face; 110. Extrusion part; 111. Extrusion protrusion; 112. First surface; 113. Second surface; 120. First shielding body; 130. Second shielding body; 131. First part; 140. First positioning protrusion; 150. Second positioning protrusion; 200. Extrusion device; 210. Bracket; 211. First support; 2111. First mounting surface; 212. Second support; 213. Guide rod; 220. Mounting seat; 221. Second mounting surface; 300. Workpiece; 301. Non-sandblasted surface; 302. Sandblasted surface; 310. Main body; 311. First sandblasted surface; 312. First non-sandblasted surface; 320. Ear; 321. Second sandblasted surface; 322. Second non-sandblasted surface; 400. Shielding block. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0048] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0049] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0050] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0051] The inventors discovered that the workpiece to be sandblasted is usually a machined part, and machined parts have processing errors, which can lead to unevenness on the non-sandblasted surface. When the masking part is attached to the workpiece surface, these uneven surfaces affect the tightness of the fit between the masking part and the workpiece, resulting in gaps between the masking part and the workpiece. Therefore, during the sandblasting process, sand particles can easily enter the non-sandblasted surface through the gaps, causing damage to the non-sandblasted surface.

[0052] The sandblasting fixture provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0053] Please see Figures 3 to 7 This application discloses a sandblasting fixture, comprising:

[0054] A shielding member 100 is used to shield the non-sandblasted surface 301 of the workpiece 300. The shielding member 100 is provided with a pressing part 110, which is made of an elastic material. For example, the pressing part 110 can be made of elastic materials such as rubber, elastic plastic, and silicone. This application does not limit the specific material of the pressing part 110.

[0055] The extrusion portion 110 has an extrusion ridge 111 for extruding the junction of the sandblasted surface 302 and the non-sandblasted surface 301 of the workpiece 300. For example, the sandblasted surface 302 and the non-sandblasted surface 301 can be different regions on the first outer surface of the workpiece 300. The extrusion portion 110 extends along the aforementioned extension direction of the junction.

[0056] It should be noted that the extrusion ridge 111 is an edge line on the extrusion ridge. The junction between the sandblasted surface 302 and the non-sandblasted surface 301 can be the dividing line between the two, or it can be the junction area formed by extending a preset distance from the dividing line between the two towards the non-sandblasted surface 301.

[0057] In this application, the shielding member 100 is provided with a pressing part 110, which is made of elastic material and has a pressing protrusion 111. When using the sandblasting fixture of this application to block sand, the shielding member 100 can cover the non-sandblasted surface 301 of the workpiece 300, and the pressing protrusion 111 can press the interface between the sandblasted surface 302 and the non-sandblasted surface 301 of the workpiece 300. Therefore, the pressing part 110 will generate elastic deformation and have an interference fit with the interface in the direction of the pressing protrusion 111 pressing the interface. Even if there is an error in the surface processing of the interface, the elastic deformation of the pressing part 110 can compensate for the error, so that the pressing protrusion 111 fits well with the interface, eliminates the gap between the two, and prevents sand and gravel from entering and damaging the non-sandblasted surface 301.

[0058] In addition, the smaller contact area between the extrusion protrusion 111 and the junction allows for higher local pressure under the same pressure, forcing the extrusion part 110 to fit tightly against the junction and forming a more reliable sealing line.

[0059] Please see Figure 8 In one optional embodiment, the extrusion portion 110 has a first surface 112 and a second surface 113, which intersect to form an extrusion ridge 111. That is, the intersection line between the first surface 112 and the second surface 113 forms the extrusion ridge 111. For example, the first surface 112 can be a plane or a curved surface; the second surface 113 can also be a plane or a curved surface.

[0060] When the shielding member 100 blocks the non-blasted surface 301, the first surface 112 faces the non-blasted surface 301 and forms a gap with the non-blasted surface 301. That is, the first surface 112 is separated from the non-blasted surface 301. Specifically, when the shielding member 100 blocks the non-blasted surface 301, the second surface 113 is located on the side of the first surface 112 that is away from the non-blasted surface 301.

[0061] In this embodiment, when the shielding member 100 blocks the non-blasted surface 301, a gap is formed between the first surface 112 and the non-blasted surface 301. Thus, even if the non-blasted surface 301 has a protruding portion due to processing errors, the first surface 112 will not adhere to it. In other words, when the extrusion part 110 extrudes the non-blasted surface 301, the protruding portion of the non-blasted surface 301 will not press against the first surface 112, thereby preventing the extrusion ridge 111 from warping away from the boundary. This ensures a large interference fit between the extrusion ridge 111 and the boundary, resulting in good adhesion stability between the extrusion ridge 111 and the boundary, preventing grit from entering and damaging the non-blasted surface 301. Of course, when the shielding member 100 blocks the non-blasted surface 301, the first surface 112 can also adhere to it; this application does not limit this.

[0062] Please see Figure 7 and Figure 8 In one alternative embodiment, the shielding member 100 includes a shield along a first direction ( Figure 7 and Figure 8 The first end face 101 and the second end face 102 are distributed in the direction indicated by the arrow in the middle (x). The extrusion part 110 is located between the first end face 101 and the second end face 102. That is, in the direction perpendicular to the first direction, the first end face 101 and the second end face 102 are both offset from the extrusion part 110. The second surface 113 is located between the first surface 112 and the first end face 101. That is, in the direction perpendicular to the first direction, the first end face 101 and the first surface 112 are both offset from the second surface 113.

[0063] The first surface 112 is inclined relative to the first direction, and along the first direction, the end of the first surface 112 near the extrusion protrusion 111 is closer to the first end face 101 than the other end of the first surface 112. Exemplarily, the end of the first surface 112 near the extrusion protrusion 111 may also be farther away from the first end face 101 than the other end of the first surface 112; this application does not limit this. It should be noted that the other end of the first surface 112 is the end of the first surface 112 that is farther away from the extrusion protrusion 111.

[0064] In this embodiment, the first surface 112 is inclined relative to the first direction, and along the first direction, the end of the first surface 112 near the extrusion protrusion 111 is closer to the first end face 101 than the other end of the first surface 112. That is, the distance between the end of the first surface 112 away from the extrusion protrusion 111 and the first end face 101 is larger. Since the second surface 113 is located between the first surface 112 and the first end face 101, the distance between the end of the first surface 112 away from the extrusion protrusion 111 and the end of the second surface 113 away from the extrusion protrusion 111 is also larger. The end of the first surface 112 away from the extrusion protrusion 111 and the end of the second surface 113 away from the extrusion protrusion 111 cooperate to form the root of the extrusion part 110. Therefore, after adopting the structure of this embodiment, the size of the root of the extrusion part 110 can be larger, thereby making the extrusion part 110 have greater structural strength, preventing the extrusion part 110 from being damaged during use, and ensuring the tight fit between the extrusion protrusion 111 and the junction. Of course, the first surface 112 may also be perpendicular to the first direction, and this application does not limit this.

[0065] In sandblasting, the sandblasting nozzle is typically rotatable, allowing it to oscillate within a certain angle range, thus targeting different areas of the sandblasting surface 302 and improving the uniformity of the sandblasting. To reduce the obstruction of the sand by the shielding member 100, and further improve the uniformity of the sandblasting on the sandblasting surface 302, please refer to [link to relevant documentation]. Figure 7 and Figure 8 In one optional embodiment, the extrusion portion 110 has a first surface 112 and a second surface 113, which intersect to form an extrusion ridge 111. The shielding member 100 includes a first end face 101 and a second end face 102 distributed along a first direction. The extrusion portion 110 is located between the first end face 101 and the second end face 102, and the second surface 113 is located between the first surface 112 and the first end face 101. It should be noted that the other end of the second surface 113 is the end of the second surface 113 that is away from the extrusion ridge 111.

[0066] The second surface 113 is inclined relative to the first direction, and along the first direction, the end of the second surface 113 near the extrusion protrusion 111 is farther away from the first end face 101 than the other end of the second surface 113. For example, the end of the second surface 113 near the extrusion protrusion 111 may also be closer to the first end face 101 than the other end of the second surface 113, and this application does not limit this.

[0067] In the sandblasting process, the shielding part 100 is generally equipped with a nozzle on the side facing away from the workpiece 300, so as to... Figure 7 Taking the indicated orientation as an example, the nozzle is located at the upper right of the shielding member 100, and the nozzle will swing to either face the sandblasting surface 302 towards the end of the shielding member 100 or towards the end of the sandblasting surface 302 away from the shielding member 100. Therefore, in this embodiment, the second surface 113 is inclined relative to the first direction, and along the first direction, the end of the second surface 113 near the extrusion protrusion 111 is farther away from the first end face 101 than the other end of the second surface 113. This allows the second surface 113 to avoid the sand and gravel ejected from the upper right at an angle, and can provide guidance for the sand and gravel ejected from the upper right at an angle, so that this part of the sand and gravel is sprayed towards the boundary, thereby increasing the amount of sand and gravel sprayed towards the boundary. With the increase in the amount of sand and gravel, the grit and matte boundary line at the boundary will be clearer. In other words, the sandblasting effect can be improved by adopting the structure of this embodiment. It should be noted that the grit and matte boundary line here refers to the boundary line between the sandblasting surface 302 and the non-sandblasting surface 301 after sandblasting is completed.

[0068] Please see Figure 7 and Figure 8 In one optional embodiment, the second surface 113 is in contact with the first end face 101. For example, the second surface 113 and the first end face 101 can be directly in contact, or they can be indirectly in contact through a chamfer, where the chamfer can be a rounded chamfer.

[0069] In this embodiment, the second surface 113 is in contact with the first end face 101, which allows the second surface 113 to have a greater extension length, thereby improving the shielding effect of the shield 100 in avoiding the gravel sprayed obliquely from the upper right, and further increasing the amount of gravel sprayed towards the boundary, so as to make the light and subsurface boundary line clearer. Of course, the end of the second surface 113 facing away from the extrusion protrusion 111 can also be separated from the first end face 101, and this application does not limit this.

[0070] Please see Figure 7 and Figure 8 In an optional embodiment, the included angle between the second surface 113 and the first end face 101 ( Figure 7 The included angle (indicated by α) is 120° to 140°. For example, the included angle between the second surface 113 and the first end face 101 can be 123°, 125°, 128°, 129°, 130°, 132°, 134°, 135°, 138°, 139°, etc. This application does not limit the specific angle between the second surface 113 and the first end face 101.

[0071] If the angle between the second surface 113 and the first end face 101 is less than 120°, the effect of the second surface 113 in avoiding the gravel ejected from the upper right will be reduced; if the angle between the second surface 113 and the first end face 101 is greater than 140°, the cross-sectional area of ​​the extrusion part 110 will be too small, which will reduce the structural strength of the extrusion part 110. Therefore, in this embodiment, the angle between the second surface 113 and the first end face 101 is controlled between 120° and 140°, which not only ensures the effect of the second surface 113 in avoiding the gravel ejected from the upper right, but also enables the extrusion part 110 to have high structural strength.

[0072] Please see Figure 5 , Figure 7 and Figure 8 In one optional embodiment, the workpiece 300 is the mid-frame of a wearable device, the mid-frame including a strip-shaped main body 310 and ear portions 320 disposed at the ends of the main body 310. Exemplarily, ear portions 320 may be disposed at both ends of the main body 310.

[0073] It should be noted that the mid-frame of the wearable device includes a plastic frame and a metal frame. The plastic frame is injection molded within the metal frame. The metal frame includes two opposing support arms, which may include a main body 310 and an ear portion 320. Please refer to [link / reference needed]. Figure 1 , Figure 3 and Figure 4 The plastic frame can be shielded by shielding block 400, which shields the end face and inner surface of the plastic frame.

[0074] The non-blasted surface 301 includes a first non-blasted surface 312, and the blasted surface 302 includes a first blasted surface 311. The first blasted surface 311 and the first non-blasted surface 312 are located in different regions of the first outer surface of the main body 310. The boundary line between the first blasted surface 311 and the first non-blasted surface 312 is defined by... Figure 4 As shown by the double-dotted line, a first boundary is formed between the first non-blasted surface 312 and the first blasted surface 311, and the boundary includes the first boundary.

[0075] The shielding member 100 includes a first shielding body 120 for shielding the first non-blasted surface 312. The first shielding body 120 is provided with a pressing portion 110 for pressing the first junction. For example, the pressing portion 110 extends along the extending direction of the first junction, and the shape of the pressing protrusion 111 is adapted to the shape of the first junction.

[0076] For example, the first shielding body 120 is provided with a first positioning protrusion 140, which is used to position and cooperate with the first recess on the middle frame. After the first positioning protrusion 140 cooperates with the first recess, the first shielding body 120 will cover the preset position on the workpiece 300, thus reducing the assembly difficulty of the first shielding body 120 and the workpiece 300.

[0077] Of course, the workpiece 300 in this application can also be the mid-frame of a mobile phone or tablet computer, or the workpiece 300 can also be a hinge, such as the hinge of a folding phone. This application does not limit the types of workpiece 300 that can be covered by the sandblasting fixture.

[0078] In one optional embodiment, the first outer surface is curved, in which case both the first sandblasted surface 311 and the first non-sandblasted surface 312 are also curved. Of course, the first outer surface can also be flat, in which case both the first sandblasted surface 311 and the first non-sandblasted surface 312 are also flat, and this application does not limit this.

[0079] When this embodiment is combined with the embodiment in which "when the shielding member 100 shields the non-sandblasted surface 301, the first surface 112 faces the non-sandblasted surface 301 and forms a gap with the non-sandblasted surface 301", as long as the first outer surface is flat, a gap will inevitably be generated between the two, which simplifies the design of the gap.

[0080] Please see Figure 9 and Figure 10In one optional embodiment, the non-blasted surface 301 further includes a second non-blasted surface 322, and the blasted surface 302 includes a second blasted surface 321. Both the second blasted surface 321 and the second non-blasted surface 322 are located on the ear portion 320, and the second blasted surface 321 and the second non-blasted surface 322 are arranged at an angle, which can be an acute angle, a right angle, or an obtuse angle. A second boundary is formed between the second non-blasted surface 322 and the second blasted surface 321, and the boundary also includes a second boundary area. For example, the second blasted surface 321 can be a curved surface or a plane, and the second non-blasted surface 322 can be a plane or a curved surface.

[0081] It should be noted that when both the second sandblasted surface 321 and the second non-sandblasted surface 322 are curved surfaces, the included angle between them is the angle between the generatrix of the second sandblasted surface 321 and the generatrix of the second non-sandblasted surface 322; similarly, when the second sandblasted surface 321 is curved and the second non-sandblasted surface 322 is flat, the included angle between them is the angle between the generatrix of the second sandblasted surface 321 and the second non-sandblasted surface 322.

[0082] The shielding member 100 also includes a second shielding body 130 for shielding the second sandblasted surface 321. The second shielding body 130 is disposed at the end of the first shielding body 120, pointing in a direction from one side of the second non-sandblasted surface 322 away from the second sandblasted surface 321 to the other side (i.e.: Figure 9 (From bottom to top) The second shielding body 130 has a first portion 131 extending beyond the second boundary, and the first portion 131 is made of an elastic material. For example, the first portion 131 can be made of elastic materials such as rubber, elastic plastic, or silicone; this application does not limit the specific material of the first portion 131. It should be noted that the other side of the second non-blasted surface 322 is the side of the second non-blasted surface 322 that is close to the second blasted surface 321.

[0083] The specific operation process is as follows: the shielding part 100 is assembled with the workpiece 300 so that the second shielding body 130 blocks the second non-sandblasted surface 322. At this time, the first part 131 of the second shielding body 130 extends beyond the second boundary in the direction from the side of the second non-sandblasted surface 322 away from the second sandblasted surface 321 to the other side. Then, the shielding member 100 is squeezed. At this time, the shielding member 100 as a whole is subjected to a force from the shielding member 100 to the workpiece 300. The first part 131 of the second shielding body 130 will deflect towards the second sandblasting surface 321 with the second junction as the deflection baseline. During this process, the second junction will squeeze the first part 131, causing the first part 131 to undergo elastic deformation. The deflected first part 131 and the second junction are in an interference fit in the extrusion direction between them. Even if there is an error in the surface processing of the second junction, the elastic deformation of the first part 131 can compensate for the error, so that the first part 131 and the second junction fit well, eliminating the gap between them and preventing sand and gravel from entering and damaging the second non-sandblasting surface 322.

[0084] For example, please refer to Figure 6 The second shielding body 130 is provided with a second positioning protrusion 150, which is used to position and cooperate with a second recess on the middle frame. After the second positioning protrusion 150 cooperates with the second recess, the second shielding body 130 will cover the preset position on the workpiece 300, thus reducing the assembly difficulty of the second shielding body 130 and the workpiece 300. It should be noted that the first positioning protrusion 140 and the second positioning protrusion 150 can be connected and integrally formed; or, the first positioning protrusion 140 and the second positioning protrusion 150 can also be separated. This application does not limit this.

[0085] In one optional embodiment, the height of the first portion 131 is 0.2–0.5 mm in the direction from one side of the second non-blasted surface 322 away from the second blasted surface 321 to the other side. For example, the height of the first portion 131 can be 0.2 mm, 0.25 mm, 0.28 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.43 mm, 0.46 mm, etc., and this application does not limit this to any particular value.

[0086] If the height of the first part 131 is less than 0.2mm, the degree to which the first part 131 can be deflected and deformed toward the workpiece 300 is too small, and the amount of deformation of the first part 131 squeezed by the second junction is also too small. Therefore, the ability to compensate for the surface processing error of the second junction is limited.

[0087] In the sandblasting process, the shielding part 100 is generally equipped with a nozzle on the side facing away from the workpiece 300, so as to... Figure 10Taking the indicated orientation as an example, the nozzle is located on the upper right side of the shield 100, and the nozzle will swing so that the nozzle faces the sandblasting surface 302 closer to the shield 100 or faces the sandblasting surface 302 away from the shield 100. If the height of the first part 131 is greater than 0.5mm, the first part 131 will extend too far beyond the second boundary. The first part 131 will block a large portion of the sand and gravel sprayed from the upper right to the second boundary. This will reduce the amount of sand and gravel distributed at the second boundary, resulting in lower clarity of the light and subsurface boundary line at the second boundary.

[0088] Therefore, in this embodiment, the height of the first part 131 is controlled at 0.2 to 0.5 mm. This can increase the amount of deformation of the first part 131 when squeezed by the second junction, ensuring that the first part 131 has a good ability to compensate for the surface processing error of the second junction. It can also reduce the amount of gravel sprayed from the upper right to the second junction by the first part 131, thereby improving the clarity of the light and dark boundary line at the second junction.

[0089] In one alternative embodiment, the shielding member 100 is made of an elastic material, thus exhibiting good flexibility and preventing damage to the workpiece 300. Furthermore, portions of the shielding member 100 other than the pressing portion 110 and the first portion 131 may also be made of a rigid material; this application does not impose any limitations on this.

[0090] Please see Figure 1 and Figure 2 In an optional embodiment, the sandblasting fixture further includes an extrusion device 200 for driving the shield 100 to move so that the extrusion portion 110 extrudes the junction.

[0091] The specific working process is as follows: the shielding part 100 is assembled with the workpiece 300 to shield the non-sandblasted surface 301 of the workpiece 300; the shielding part 100 is squeezed by the extrusion device 200 so that the extrusion protrusion 111 of the extrusion part 110 squeezes the junction, so that the extrusion protrusion 111 fits well with the junction, eliminating the gap between the two and preventing sand and gravel from entering and damaging the non-sandblasted surface 301.

[0092] Please see Figure 2 In one optional embodiment, the extrusion device 200 includes a bracket 210, a mounting base 220, and a drive member (not shown in the figure). The bracket 210 has a first mounting surface 2111 for mounting the workpiece 300, and the mounting base 220 has a second mounting surface 221 for mounting the shielding member 100. The first mounting surface 2111 and the second mounting surface 221 are arranged opposite to each other and spaced apart. The mounting base 220 and the bracket 210 are slidably engaged in the arrangement direction of the second mounting surface 221 and the first mounting surface 2111. The drive member is disposed on the bracket 210 and can drive the mounting base 220 to move to extrude the junction.

[0093] The specific working process is as follows: the workpiece 300 is placed on the first mounting surface 2111 of the bracket 210, and the shielding member 100 is placed on the second mounting surface 221 of the mounting base 220; the shielding member 100 is driven to move closer to the workpiece 300 using the driving member until the shielding member 100 and the workpiece 300 are assembled, and the extrusion protrusion 111 fits well with the junction. Furthermore, since the workpiece 300 is mounted on the bracket 210 and the driving member is located on the bracket 210, after the driving member drives the shielding member 100 and the workpiece 300 to assemble, the shielding member 100 and the workpiece 300 will be clamped on the bracket 210, which facilitates the placement of the whole assembly consisting of the shielding member 100, the workpiece 300 and the bracket 210 inside the sandblasting equipment.

[0094] Please see Figure 2 In one optional embodiment, the bracket 210 includes a first support 211, a second support 212, and a guide rod 213. The first support 211 has a first mounting surface 2111. The first support 211 and the second support 212 are spaced apart along the arrangement direction and connected by the guide rod 213. The guide rod 213 extends along the arrangement direction. The mounting base 220 is located between the first support 211 and the second support 212 and slides with the guide rod 213 in the arrangement direction. For example, the mounting base 220 has a guide hole, through which the guide rod 213 passes and slides with the guide hole; further, the mounting base 220 has two guide holes, and the number of guide rods 213 includes two, with each guide rod 213 passing through one of the two guide holes.

[0095] The drive component includes an elastic element, one end of which is connected to the mounting base 220 and the other end is connected to the first support 211 or the second support 212. The elastic element is used to provide a restoring force in the direction from the second mounting surface 221 to the first mounting surface 2111.

[0096] In this embodiment, the driving component includes an elastic element, which can drive the mounting base 220 to move in the direction from the second mounting surface 221 to the first mounting surface 2111, thereby assembling the shielding member 100 to the workpiece 300 and pressing the extrusion protrusion 111 at the interface. During the sandblasting process, the sand will impact the workpiece 300, the mounting base 220, and other components, causing the workpiece 300 and the mounting base 220 to vibrate. The elastic element in this embodiment can absorb the vibration caused by the impact of the sand, ensuring that the extrusion protrusion 111 fits tightly with the interface and preventing sand from entering the non-sandblasted surface 301.

[0097] Please see Figure 2In one optional embodiment, at least one of the first support 211 and the second support 212 is adjustable in installation position along the arrangement direction. Exemplarily, the first end of the guide rod 213 has a threaded structure, the first support 211 is threadedly connected to the first end of the guide rod 213, the second end of the guide rod 213 has a limiting protrusion, the second support 212 passes through the second end of the guide rod 213, and the second end of the guide rod 213 is also threadedly connected to a nut. The second support 212 is located between the nut and the limiting protrusion, and the second support 212 abuts against the limiting protrusion via the nut.

[0098] In this embodiment, the installation position of at least one of the first support 211 and the second support 212 along the arrangement direction is adjustable. By adjusting the position of the first support 211 and / or the second support 212 along the arrangement direction, the distance between the first support 211 and the second support 212 can be adjusted, thereby adapting to workpieces 300 of different sizes and improving the adaptability of the sandblasting fixture.

[0099] Please see Figure 2 In one optional embodiment, the number of first mounting surfaces 2111, mounting bases 220, and driving components are all multiple, arranged in a direction parallel to the horizontal direction. The multiple first mounting surfaces 2111 are distributed along a second direction, which is perpendicular to both the arrangement direction and the vertical direction. Each mounting base 220 is provided corresponding to each first mounting surface 2111, and each driving component is connected to each mounting base 220.

[0100] In this embodiment, the number of the first mounting surface 2111, the mounting base 220 and the driving component are all multiple, so that multiple workpieces 300 can be clamped on the bracket 210 at the same time. When the bracket 210 is placed in the sandblasting equipment, multiple workpieces 300 can be sandblasted at the same time, thereby improving the sandblasting efficiency.

[0101] The foregoing embodiments of this application focus on describing the differences between various embodiments. As long as the different optimization features between embodiments are not contradictory, they can be combined to form better embodiments. For the sake of brevity, these differences will not be elaborated upon here. The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art, under the guidance of this application, can make many modifications without departing from the spirit and scope of the claims, all of which fall within the protection scope of this application.

Claims

1. A sandblasting fixture, characterized in that, include: A shielding member (100) is used to shield the non-blasted surface (301) of the workpiece (300); The shielding member (100) is provided with a pressing part (110), the pressing part (110) is made of elastic material, the pressing part (110) has a pressing protrusion (111), the pressing protrusion (111) is used to press the junction of the sandblasted surface (302) and the non-sandblasted surface (301) of the workpiece (300).

2. The sandblasting fixture according to claim 1, characterized in that, The extrusion part (110) has a first surface (112) and a second surface (113), and the first surface (112) and the second surface (113) intersect to form the extrusion protrusion (111); When the shielding member (100) shields the non-blasted surface (301), the first surface (112) faces the non-blasted surface (301) and forms a gap with the non-blasted surface (301).

3. The sandblasting fixture according to claim 2, characterized in that, The shielding member (100) includes a first end face (101) and a second end face (102) distributed along a first direction, the extrusion part (110) is located between the first end face (101) and the second end face (102), and the second surface (113) is located between the first surface (112) and the first end face (101); The first surface (112) is inclined relative to the first direction, and along the first direction, the end of the first surface (112) near the extrusion protrusion (111) is closer to the first end face (101) than the other end of the first surface (112).

4. The sandblasting fixture according to claim 1, characterized in that, The extrusion part (110) has a first surface (112) and a second surface (113), and the first surface (112) and the second surface (113) intersect to form the extrusion protrusion (111); The shielding member (100) includes a first end face (101) and a second end face (102) distributed along a first direction, the extrusion part (110) is located between the first end face (101) and the second end face (102), and the second surface (113) is located between the first surface (112) and the first end face (101); The second surface (113) is inclined relative to the first direction, and along the first direction, the end of the second surface (113) near the extrusion protrusion (111) is farther away from the first end face (101) than the other end of the second surface (113).

5. The sandblasting fixture according to claim 4, characterized in that, The second surface (113) is in contact with the first end face (101).

6. The sandblasting fixture according to claim 5, characterized in that, The angle between the second surface (113) and the first end face (101) is 120° to 140°.

7. The sandblasting fixture according to any one of claims 1 to 6, characterized in that, The workpiece (300) is the mid-frame of a wearable device. The mid-frame includes a strip-shaped main body (310) and an ear (320) located at the end of the main body (310). The non-sandblasted surface (301) includes a first non-sandblasted surface (312), and the sandblasted surface (302) includes a first sandblasted surface (311). The first sandblasted surface (311) and the first non-sandblasted surface (312) are located in different areas of the first outer surface of the main body (310). A first boundary is formed between the first non-sandblasted surface (312) and the first sandblasted surface (311). The boundary includes the first boundary. The shielding member (100) includes a first shielding body (120) for shielding the first non-sandblasted surface (312), and the first shielding body (120) is provided with the extrusion part (110) for extruding the first junction.

8. The sandblasting fixture according to claim 7, characterized in that, The first outer surface is an arc surface.

9. The sandblasting fixture according to claim 7, characterized in that, The non-blasted surface (301) further includes a second non-blasted surface (322), the blasted surface (302) includes a second blasted surface (321), the second blasted surface (321) and the second non-blasted surface (322) are both provided on the ear (320), and the second blasted surface (321) and the second non-blasted surface (322) are arranged at an angle, and a second boundary is formed between the second non-blasted surface (322) and the second blasted surface (321), and the boundary also includes the second boundary. The shielding member (100) further includes a second shielding body (130) for shielding the second sandblasted surface (321). The second shielding body (130) is disposed at the end of the first shielding body (120) and points in a direction from one side of the second non-sandblasted surface (322) away from the second sandblasted surface (321) to the other side. The second shielding body (130) has a first portion (131) extending beyond the second junction. The first portion (131) is made of an elastic material.

10. The sandblasting fixture according to claim 9, characterized in that, Along the direction from the side opposite to the second sandblasting surface (321) on the second non-sandblasting surface (322) to the other side, the height of the first part (131) is 0.2 to 0.5 mm.

11. The sandblasting fixture according to claim 1, characterized in that, The shielding element (100) is made of an elastic material.

12. The sandblasting fixture according to claim 1, characterized in that, The sandblasting fixture also includes an extrusion device (200) for driving the shielding member (100) to move so that the extrusion part (110) extrudes the junction.

13. The sandblasting fixture according to claim 12, characterized in that, The extrusion device (200) includes a bracket (210), a mounting base (220), and a driving member. The bracket (210) has a first mounting surface (2111) for mounting the workpiece (300), and the mounting base (220) has a second mounting surface (221) for mounting the shielding member (100). The first mounting surface (2111) and the second mounting surface (221) are arranged opposite to each other and spaced apart. The mounting base (220) and the bracket (210) slide in cooperation in the arrangement direction of the second mounting surface (221) and the first mounting surface (2111). The drive element is located on the bracket (210) and can drive the mounting base (220) to move to press the junction.

14. The sandblasting fixture according to claim 13, characterized in that, The bracket (210) includes a first support (211), a second support (212), and a guide rod (213). The first support (211) has a first mounting surface (2111). The first support (211) and the second support (212) are spaced apart along the arrangement direction and connected by the guide rod (213). The guide rod (213) extends along the arrangement direction. The mounting seat (220) is located between the first support (211) and the second support (212) and slides with the guide rod (213) in the arrangement direction. The drive component includes an elastic element, one end of which is connected to the mounting base (220) and the other end is connected to the first support (211) or the second support (212). The elastic element is used to provide a restoring force in the direction from the second mounting surface (221) to the first mounting surface (2111).

15. The sandblasting fixture according to claim 14, characterized in that, At least one of the first support (211) and the second support (212) is adjustable in its installation position along the arrangement direction.

16. The sandblasting fixture according to claim 13, characterized in that, The number of the first mounting surface (2111), the mounting base (220), and the driving component are all multiple. The arrangement direction is parallel to the horizontal direction. The multiple first mounting surfaces (2111) are distributed along a second direction, which is perpendicular to the arrangement direction and the vertical direction, respectively. Each mounting base (220) is respectively provided corresponding to each first mounting surface (2111), and each driving component is respectively connected to each mounting base (220).

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