Pressing rivet jig

Abstract

The utility model provides a pressing rivet jig. The pressing rivet jig comprises a base, a workpiece limiting structure and a rivet installation structure. The rivet mounting structure comprises a plurality of positioning columns, and the positioning columns are arranged in an inner side operation area limited by the workpiece limiting structure; the bottom end of the positioning column is fixed on the base, the top end of the positioning column is a positioning mounting part, the bottom joint of the positioning mounting part is a step surface, the positioning mounting part is used for sleeving a rivet, and a workpiece is placed on the rivet; the workpiece limiting structure comprises at least one limiting block and a plurality of elastic plungers arranged on the limiting blocks. The limiting block is fixed on the base; the elastic plunger is arranged along the horizontal plane and is used for positioning and clamping a plurality of workpieces which are sequentially arranged from top to bottom; through the configuration, the position precision of the workpiece can be ensured, the degree of freedom of the workpiece can be limited, the stability of the position of the workpiece is kept, the problem of flash is avoided, meanwhile, the rivet pressing procedure is reduced, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of riveting processing of semiconductor products, in particular to a riveting jig capable of avoiding rivet flash. Background Art

[0002] In the prior art, it is necessary to manually shake the workpiece (such as a housing, substrate, or cover) to align the workpiece with the riveting jig, and then operate the riveting equipment to press down and rivet the workpiece. This method has differences and limitations in manual operation, and it is also impossible to quantify the operator's operating techniques. It is easy to cause the workpiece to not be shaken properly, resulting in flash. In other words, the traditional riveting jig cannot position and clamp the workpiece, and requires manual operation. Not only is the positioning inaccurate, but the workpiece is also prone to movement during the riveting process, resulting in flash.

[0003] It should be noted that the information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a riveting jig, which can position and clamp the workpiece to eliminate the flash of semiconductor products, reduce the riveting process, and reduce the production cost.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a pressure riveting fixture, including a base, a workpiece limiting structure and a rivet installation structure;

[0006] The rivet installation structure includes a plurality of positioning columns, which are arranged in the inner working area defined by the workpiece limiting structure; the bottom end of the positioning column is fixed to the base, the top end of the positioning column is a positioning installation part, the bottom connection of the positioning installation part is a step surface, the positioning installation part is used to sleeve the rivet, and the rivet is used to place the workpiece;

[0007] The workpiece limiting structure comprises at least one limiting block and a plurality of elastic plungers arranged on the limiting block; the limiting block is fixed on the base; the elastic plungers are arranged along a horizontal plane and are used to position and clamp a plurality of workpieces placed in sequence up and down.

[0008] Optionally, several elastic plungers are arranged at different heights, and the elastic plungers at different heights are used to position and clamp different workpieces, and the elastic plungers at the same height are used to position and clamp the same workpiece, and the center height of the elastic plunger is configured to be able to position and clamp the workpiece both before and after the workpiece is pressed.

[0009] Optionally, at least four elastic plungers are arranged at the same height.

[0010] Optionally, the outer diameter of the positioning and mounting portion decreases from the bottom to the top.

[0011] Optionally, the outer diameter of the positioning and mounting portion gradually decreases from the bottom to the top.

[0012] Optionally, the maximum outer diameter of the positioning and mounting portion is 0.1 mm to 0.2 mm smaller than the inner hole diameter of the rivet.

[0013] Optionally, there are multiple limit blocks, and the multiple limit blocks are arranged circumferentially around the central axis of the base, and each of the limit blocks is provided with one or more elastic plungers.

[0014] Optionally, the top end of the limit block is configured to have at least two steps, and the elastic plunger is disposed at each step, so that a plurality of the elastic plungers are distributed at different heights.

[0015] Optionally, the riveting jig also includes a pressure block arranged opposite to the base, the pressure block is used to be connected to a riveting device, and the riveting device is used to drive the pressure block to approach or move away from the base; when the pressure block is driven to move closer to the base, the pressure block is used to contact the top layer of the workpiece, and then press down the top layer of the workpiece until multiple workpieces are riveted and fixed.

[0016] Optionally, a side of the pressing block facing the base is provided with a space-avoiding structure, and the space-avoiding structure is used to avoid a step at the top end of the limiting block.

[0017] As mentioned above, in the riveting jig provided by the utility model, a plurality of workpieces placed in sequence up and down can be positioned and clamped by a plurality of elastic plungers. Such a configuration can ensure that each workpiece is accurately aligned with the riveting jig, ensure the position accuracy of the workpiece, limit the degree of freedom of the workpiece, maintain the stability of the workpiece position, and thus avoid burrs caused by inaccurate positioning and misalignment of the workpiece. At the same time, the steps of placing the dispensing jig and dispensing glue can be omitted, as well as the step of manually shaking the workpiece to make the workpiece concentric with the jig, thereby reducing the overall process, thereby improving production efficiency, reducing manual errors, and reducing production costs.

[0018] In a further improvement, by designing the positioning and mounting portion to have an outer diameter that decreases from the bottom to the top, it is possible to avoid the upper portion of the rivet being stuck with the positioning and mounting portion after riveting, so that the product can be removed smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application.

[0020] Figure 1 It is a structural schematic diagram of a pressure riveting fixture in one embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a base and a workpiece limiting structure arranged on the base in one embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of a base and a rivet mounting structure arranged on the base in one embodiment of the utility model;

[0023] Figure 4 It is a schematic structural diagram of a limit block in an embodiment of the utility model;

[0024] Figure 5 It is a structural schematic diagram of an elastic plunger in an embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of a positioning column in an embodiment of the utility model;

[0026] Figure 7 It is a structural schematic diagram of the top end of the positioning column in one embodiment of the utility model;

[0027] Figure 8 It is a schematic diagram of the structure of a pressing block in one embodiment of the utility model;

[0028] Fig. 9 yes Figure 8 Schematic diagram of the upward structure when the middle pressure block avoids the limit block;

[0029] Fig.10 1 is a design principle diagram of the center height of the elastic plunger in one embodiment of the utility model; wherein the solid line indicates the uppermost workpiece before pressing, and the dotted line indicates the uppermost workpiece after pressing.

[0030] Wherein, [Description of Reference Numerals is as follows]:

[0031] 1-base; 2-workpiece limiting structure; 21-limiting block; 211-plunger mounting hole; 212-step structure; 213-step; 22-elastic plunger; 221-plunger body; 222-ball head; 3-rivet mounting structure; 31-positioning column; 32-positioning mounting part; 33-step surface; 4-pressing block; 41-air avoidance structure. DETAILED DESCRIPTION

[0032] As described in the background technology, the prior art requires manual shaking of the workpiece to make the workpiece concentric with the riveting jig. Specifically, taking the riveting of the shell and the substrate as an example, the traditional practice is: first put the substrate in the glue dispensing jig, then put the shell in the glue dispensing jig, and then pre-fix the substrate and the shell by glue to form an integral structure, and then put the pre-fixed substrate and shell overall structure into the riveting jig. At this time, it is necessary to manually shake the overall structure of the substrate and the shell to make the substrate and the shell concentric with the riveting jig. Doing so requires more manual operation steps and a special glue dispensing jig, so the operation is cumbersome and costly, and the positioning is inaccurate, and the freedom of the substrate and the shell cannot be limited during the riveting process, resulting in the problem of flash.

[0033] To this end, the utility model provides a new type of riveting fixture, which can position and clamp the workpiece, thereby eliminating the flash problem of semiconductor products during riveting, reducing the riveting process, reducing production costs, and improving production efficiency.

[0034] The following is a further detailed description of the press riveting jig proposed in the utility model in conjunction with the accompanying drawings. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model. It should be recognized that relative terms such as "above", "below", "top", "bottom", "above" and "below" shown in the drawings can be used to describe the relationship between various elements. These relative terms are intended to cover different orientations of elements other than the orientations depicted in the drawings. For example, if the device is inverted relative to the view in the drawings, an element described as "above" another element will now be below the element. In this article, the three directions of the press riveting jig are represented by rectangular coordinate axes, wherein the x-axis and the y-axis are arranged on the horizontal plane, and the z-axis is arranged on the vertical plane.

[0035] Figure 1 FIG. 1 is a schematic diagram of the structure of a pressure riveting fixture in an embodiment of the utility model. Figure 1 As shown, the riveting jig includes a base 1, a workpiece limiting structure 2 and a rivet mounting structure 3 arranged on the base 1. The rivet mounting structure 3 includes a plurality of positioning columns 31, and these positioning columns 31 are arranged in the inner working area defined by the workpiece limiting structure 2. The inner working area refers to the space defined by the side of the workpiece limiting structure 2 close to the central axis of the base 1, which serves as the working area for the workpiece riveting.

[0036] The number of positioning columns 31 should be determined according to the number of rivets on the workpiece. In the specific example, the number of positioning columns 31 is four, but it is not limited to this. The positioning columns 31 are used to support the installation of rivets (not shown), and the bottom end of the positioning columns 31 is fixed to the base 1. There are many fixing methods, which are not limited to this, and the fixing method can be detachable or non-detachable.

[0037] Please focus on Figure 3 and Figure 6-7 As shown, the top of the positioning column 31 is a positioning mounting portion 32, and the bottom connection of the positioning mounting portion 32 is a step surface 33. The step surface 33 can support the rivet. The rivet is first sleeved on the positioning mounting portion 32, and then the workpiece is placed on the rivet. When the workpiece is placed, the rivet hole on the workpiece is opposite to the rivet.

[0038] Return to reference Figure 1 and Figure 2 As shown, the workpiece limiting structure 2 includes at least one limiting block 21 and a plurality of elastic plungers 22 arranged on the limiting block 21. The limiting block 21 is fixed to the base 1, for example, detachably fixed or non-detachably fixed, and the specific fixing method is not limited. In addition, the elastic plunger 22 is arranged along the horizontal plane and is used to position and clamp a plurality of workpieces placed in sequence up and down. In other words, a certain number of elastic plungers 22 are used to position and clamp two or more workpieces. After the multiple workpieces are positioned and clamped, rivets are used to rivet and fix the workpieces.

[0039] Furthermore, the number of the limit blocks 21 may be one, two, three or more, and the specific number is not limited. When the number of the limit blocks 21 is multiple, the multiple limit blocks 21 are arranged circumferentially around the central axis of the base 1, and one or more elastic plungers 22 may be provided on each limit block 21. Figure 2 As shown, the four corners of the base 1 are provided with limit blocks 21, and the limit blocks 21 at each corner are respectively provided along the two sides of the corner, that is, the limit blocks 2 at each corner are respectively provided along the directions of the x-axis and the y-axis. Optionally, the number of limit blocks 21 is eight, and two limit blocks 2 are respectively provided at the four corners of the base 1, and the two limit blocks 21 at each corner are respectively provided along the directions of the x-axis and the y-axis of the corner, which facilitates providing enough points on the periphery of the workpiece to install the elastic plunger 22. It should be noted that when the workpiece limit structure 2 adopts multiple limit blocks 21, it is conducive to processing and assembly.

[0040] The number of elastic plungers 22 used should be set according to actual needs. The specific number and specific position of the elastic plungers 22 can ensure that the workpiece is evenly stressed, so that the workpiece is concentric with the riveting jig, and the workpiece does not tilt or move during the riveting process. Therefore, a certain number of elastic plungers 22 can provide accurate positioning for the workpiece and limit the freedom of movement of the workpiece along the x-axis and y-axis directions and the freedom of rotation around the z-axis.

[0041] Taking the riveting of two workpieces as an example, the specific operation is as follows: first place the rivet on the top of the positioning column 31 and sleeve it on the positioning mounting portion 32, then place workpiece one on the rivet, while placing workpiece one, the elastic plunger 22 automatically positions and clamps workpiece one, so that workpiece one remains concentric with the riveting jig and does not move forward, backward, left or right, then place workpiece two on workpiece one, while placing workpiece two, the elastic plunger 22 automatically positions and clamps workpiece two, so that workpiece two remains concentric with the riveting jig and does not move forward, backward, left or right; after all workpieces are positioned and clamped, operate the riveting equipment to rivet the two workpieces together; after the riveting is completed, exit the riveting equipment, and then take the two riveted workpieces out of the riveting jig.

[0042] It can be seen that the use of the elastic plunger 22 on the riveting jig can ensure that each workpiece is accurately aligned with the riveting jig, ensure the position accuracy of the workpiece, and limit the degree of freedom of the workpiece, maintain the stability of the workpiece position, and prevent the workpiece from shifting during the processing process, thereby avoiding the flash problem caused by inaccurate positioning and misalignment of the workpiece. Therefore, it is conducive to strictly controlling the positioning of the material, and will not cause flash due to differences in operator techniques. At the same time, it can also save the steps of placing the dispensing jig and dispensing, and the step of manually shaking the workpiece to make the workpiece concentric with the jig, so that the overall process is reduced, thereby improving production efficiency, reducing manual errors, and reducing production costs. In addition, the elastic plunger 22 has a simple structure, convenient positioning and clamping, and can achieve the positioning and clamping of a variety of workpieces, and is more flexible and convenient to use.

[0043] There is no special restriction on the specifications of the elastic plunger 22 , and the elastic plunger 22 of appropriate specifications can be selected according to actual needs.

[0044] Several elastic plungers 22 may be arranged at the same height, so that all workpieces can be positioned and clamped by the elastic plungers 22 at the same height.

[0045] Preferably, several elastic plungers 22 are arranged at different heights, and the elastic plungers 22 at different heights position and clamp workpieces at different heights, and the elastic plungers 22 at the same height only position and clamp the same workpiece at the corresponding height. With this arrangement, positioning is more accurate and use is more convenient.

[0046] For example, when there are two workpieces, all elastic plungers 22 are set at the same height, and the upper and lower workpieces can be positioned and clamped at the same time. Alternatively, the elastic plungers 22 are set at different heights and in two layers, and the elastic plungers 22 in the upper layer position and clamp the upper workpiece, and the elastic plungers 22 in the lower layer position and clamp the lower workpiece.

[0047] For another example, when there are three workpieces, all the elastic plungers 22 are set at the same height, and the three workpieces can be positioned and clamped at the same time. Alternatively, the elastic plungers 22 are set at different heights and in three layers. The elastic plungers 22 in the uppermost layer position and clamp the workpiece in the uppermost layer, the elastic plungers 22 in the middle layer position and clamp the workpiece in the middle layer, and the elastic plungers 22 in the lowermost layer position and clamp the workpiece in the lowermost layer. Alternatively, the elastic plungers 22 are distributed in two layers, and the two layers of elastic plungers 22 provide positioning and clamping for the three workpieces. At this time, two of the workpieces must be positioned and clamped by the elastic plungers 22 at the same height, and the other workpiece is positioned and clamped by the elastic plunger 22 at a different height.

[0048] Each workpiece can actually be positioned and clamped by at least two elastic plungers 4. More appropriately, three, four or more elastic plungers 4 are used to achieve higher positioning accuracy and better workpiece stability. Preferably, at least four elastic plungers 22 are arranged at the same height, and at least four elastic plungers 22 can be distributed in a rectangular four-point pattern. More preferably, eight elastic plungers 22 are arranged at the same height. The positioning method of four-point distribution or eight-point distribution can achieve high-precision positioning, meeting the positioning switching and high-quality production requirements of semiconductor product riveting jigs.

[0049] Please refer to Figure 2 As shown, in the specific example, there are two workpieces, and the elastic plungers 22 are distributed in two layers, and the number of elastic plungers 22 in each layer is eight. The eight elastic plungers 22 provide force in the x-axis and y-axis directions respectively. The specific positions of the eight elastic plungers 22 can be set according to actual conditions, including but not limited to the positions shown in the figure.

[0050] In practice, the elastic plungers 22 are preferably symmetrically distributed, including symmetrically distributed about the y-axis, and symmetrically distributed about the x-axis. In addition, the elastic plungers 22 at different heights can be aligned up and down, or staggered up and down.

[0051] Furthermore, during the process of pressing the rivet, the top workpiece (such as workpiece 2) is pressed downward, so the height will change accordingly. At this time, it is necessary to ensure that the elastic plunger 22 can contact the workpiece before and after the top workpiece is pressed together to provide positioning and clamping. Therefore, when positioning the upper workpiece, the height of the elastic plunger 22 needs to be reasonably set, such as Fig.10As shown, based on the height h1 of the upper workpiece before pressing, the height h2 after pressing, and the thickness t of the uppermost workpiece, the center height h of the elastic plunger 22 is set, where h

[0052] There are many ways to fix the elastic plunger 22, such as press-fit fixation or thread locking fixation. Figure 4 As shown, the limit block 21 is provided with plunger mounting holes 211, and the number of the plunger mounting holes 211 is consistent with the number of the elastic plungers 22. The plunger mounting holes 211 can be a plain hole (a hole without thread) or a threaded hole.

[0053] See also Figure 5 As shown, the elastic plunger 22 includes a plunger body 221, a ball head 222 and a spring (not shown); the spring is embedded in the plunger body 221, and the ball head 222 protrudes from the plunger body 221, and the movement of the ball head 222 is achieved by means of the expansion and contraction of the spring. During installation, the plunger body 221 of the elastic plunger 22 is inserted into the plunger mounting hole 211 on the limit block 21, and the plunger body 221 can be fixed. In practice, the height of the ball head 222 of each elastic plunger 22 protruding from the plunger body 221 is consistent, so as to facilitate use.

[0054] Furthermore, there may be a problem of difficulty in removing the product after riveting. Specifically: after the workpieces are riveted together with rivets, the rivets may be stuck by the retracted workpiece, resulting in a tight upper limit and a loose lower limit between the upper part of the rivet and the positioning and mounting part, making it difficult to remove the riveted product. Although there is a clearance fit between the positioning and mounting part and the inner hole of the rivet before riveting, the traditional positioning and mounting part is designed as an equal-diameter cylinder. The reason for the jam is that the workpiece will shrink at the rivet connection after riveting, and this shrinkage mainly occurs in the upper part of the rivet, which causes the upper part of the rivet to be affected by the retracted workpiece and close to the positioning and mounting part.

[0055] Specifically, taking the riveting of the two workpieces mentioned above as an example, the problem of inward shrinkage may occur at the connection between the rivet and the second workpiece during the riveting process. The inward shrinkage of the second workpiece causes the inner hole of the upper part of the rivet to shrink. The traditional positioning and mounting part is an equal-diameter cylinder. Even if a gap is reserved before riveting, the gap is not enough to offset the inward shrinkage, resulting in the phenomenon that the upper limit of the rivet is tight and the lower limit is loose after the second workpiece shrinks. At this time, if the gap between the inner hole of the rivet and the equal-diameter cylinder is increased, the shaking between the riveted inner hole and the equal-diameter cylinder will be large, and the positioning will be inaccurate.

[0056] ​To solve this technical problem, in a further improvement, the positioning and mounting portion 32 is configured such that the outer diameter decreases from the bottom to the top thereof, and the outer diameter can be reduced gradually or first reduced and then kept unchanged. In this way, the positioning and mounting portion 32 can effectively position the rivet while leaving enough space to avoid jamming during the pressing process of the workpieces.

[0057] Please refer to Figure 3 and Figure 6-7 As shown, in a preferred embodiment, the positioning and mounting portion 32 is a tapered structure as a whole, and the outer diameter gradually decreases from the bottom to the top.

[0058] In order to smoothly assemble the rivet, the maximum outer diameter D1 of the positioning mounting part 32 is smaller than the diameter of the inner hole of the rivet. Due to the variable diameter setting of the positioning mounting part 32, a larger gap can be formed between it and the inner hole of the rivet. After riveting, although the rivet is affected by the shrinkage of the workpiece, the upper part of the rivet can still maintain a clearance fit with the variable diameter positioning mounting part 32, so that the upper part of the rivet will not be close to the positioning mounting part 32, so as to facilitate the removal of the product.

[0059] The gap between the positioning mounting portion 32 and the inner hole of the rivet should be appropriate. If the gap is too large, it will affect the positioning accuracy. If the gap is too small, it is easy to get stuck. For this reason, preferably, the maximum outer diameter D1 of the positioning mounting portion 32 is 0.1mm to 0.2mm smaller than the diameter of the inner hole of the rivet. In the specific example, the diameter of the inner hole of the rivet is 6.4±0.05mm, while the maximum outer diameter D1 of the positioning mounting portion 32 is 6.3±0.05mm, and the minimum outer diameter D2 of the positioning mounting portion 32 is 6.2±0.05mm. The height of the positioning mounting portion 32 is not limited. Generally, the height of the positioning mounting portion 32 does not exceed the height of the limit block 21.

[0060] Please refer to Figure 1 , and combined with Figure 8-Figure 9 As shown, in some embodiments of the present application, the compression riveting jig further includes a pressure block 4, which is arranged opposite to the base 1. The pressure block 4 is used to connect with the compression riveting device, and then the compression riveting device drives the pressure block 4 to move closer to or away from the base 1; when the pressure block 4 is driven to move closer to the base 1, the pressure block 4 contacts the top workpiece, and then presses down the top workpiece until multiple workpieces are riveted and fixed. It should also be noted that the pressure block 4 may not be included in the compression riveting jig provided by the utility model, but used as an external structure.

[0061] The pressing block 4 cannot be too small in actual use, and its contact area should be increased as much as possible to make the workpiece evenly stressed. In addition, after the workpiece is positioned and clamped on the riveting jig, the height of the topmost workpiece can be higher than the height of the limit block 21, or it can be flush with the height of the limit block 21, or lower than the height of the limit block 21.

[0062] In the specific example, the height of the limit block 21 is higher than the height of the uppermost workpiece. At this time, in order to enable the pressing block 4 to smoothly contact the uppermost workpiece, a clearance structure 41 needs to be provided on the pressing block 4. Figure 8 and Fig. 9 .

[0063] In some embodiments of the present application, Figure 2 and Figure 4 As shown, the top of the limit block 21 is configured to have at least two step structures 212, and the number of steps is consistent with the number of layers of the elastic plunger 22. Thus, an elastic plunger 22 is provided at each step 213 of the step structure 212, so that the elastic plungers 22 can be distributed at different heights.

[0064] In some embodiments of the present application, Figure 8 and Fig. 9 As shown, a plurality of air-avoiding structures 41 are provided on one side of the pressing block 4 facing the base 1, and each air-avoiding structure 41 can be a through hole or a blind hole. In the process of pressing the pressing block 4, these air-avoiding structures 41 are aligned with the steps 213 on the stop block 21, and the steps 213 are allowed to be embedded in the air-avoiding structures 41, thereby avoiding the stop block 21, so that the pressing block 4 can smoothly press down the workpiece to realize riveting. It should be noted that the elastic plunger 22 does not enter the air-avoiding structure 41.

[0065] The following is a further description of the riveting step in conjunction with several specific embodiments, wherein two workpieces are used, each workpiece is positioned and clamped by eight elastic plungers 22 of corresponding height, and the two workpieces are fixed by four rivets. The specific operation is as follows:

[0066] Step 1: First, install four rivets on the positioning and mounting parts 32 of the corresponding positioning columns 31;

[0067] Step 2: After the rivet is installed, install the workpiece 1 (such as a housing or a cover); specifically, place the workpiece 1 on the rivet. During the placement process, the eight elastic plungers 22 in the lower layer retract inwards after receiving the pressure of the workpiece 1. Then, when the workpiece 1 is installed in place, the workpiece 1 is automatically corrected to the center position of the rivet by the force of each elastic plunger 22, so that the workpiece 1 and the rivet remain concentric.

[0068] Step 3: After the installation of workpiece 1 is completed, workpiece 2 (such as a substrate) is installed; specifically, workpiece 2 is placed on workpiece 1. During this process, the eight elastic plungers 22 in the upper layer retract inwards after receiving the pressure of workpiece 2. Then, when workpiece 2 is installed in place, workpiece 2 is automatically corrected to the center position of the rivet by the force of each elastic plunger 22, so that workpiece 2 and the rivet remain concentric;

[0069] Step 4: After the installation of workpiece 2 is completed, operate the riveting equipment to drive the pressure block 4 to press down and contact workpiece 2, and then fix the two workpieces by rivets; among them, when the overall height of the limit block 21 is higher than that of workpiece 2, the pressure block 4 avoids the step 213 (the second step) on the limit block 21 through the air avoidance structure 41, and smoothly moves down to the target position to complete the riveting.

[0070] Finally, for the above demonstration example, 6 groups of riveted samples were provided to verify the flash rate. The results showed that no flash appeared at the rivet connection of the 6 groups of samples. It can be seen that the riveting fixture provided by the utility model can better solve the problem of product flash and has a good effect.

[0071] The riveting fixture provided by the utility model is mainly suitable for riveting and fixing semiconductor products, such as riveting a shell and a substrate, or riveting a substrate and a cover plate, etc., and in some application scenarios, even if the size of the shell in the x and y directions is larger than the size of the substrate in the x and y directions, the problem of difficulty in taking and placing the shell can be solved by means of the adaptive positioning of the elastic plunger 22. Therefore, the positioning method provided by the utility model is suitable for workpieces of various shapes and sizes.

[0072] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. Also, although the present invention has been disclosed as above with preferred embodiments, the above embodiments are not intended to limit the present invention. For any technician familiar with the art, without departing from the scope of the technical solution of the present invention, the technical content disclosed above can be used to make many possible changes and modifications to the technical solution of the present invention, or modified into equivalent embodiments of equivalent changes. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of protection of the technical solution of the present invention.

[0073] It should also be recognized that, unless otherwise specified or indicated, the terms "first", "second", "third", etc. in the specification are only used to distinguish between various components, elements, steps, etc. in the specification, and are not used to indicate the logical relationship or sequential relationship between various components, elements, steps, etc. It should also be understood that the singular forms "a" and "an" used herein and in the attached specification include plural references unless the context clearly indicates otherwise. For example, a reference to "a step" or "a device" means a reference to one or more steps or devices, and may include secondary steps and secondary devices.

Claims

1. A riveting jig, characterized in that: It includes a base, a workpiece limiting structure and a rivet installation structure; The rivet installation structure includes a plurality of positioning columns, the positioning columns are arranged in the inner working area defined by the workpiece limiting structure, the bottom ends of the positioning columns are fixed to the base, the top ends of the positioning columns are positioning installation parts, the bottom connection part of the positioning installation parts is a step surface, the positioning installation parts are used to sleeve rivets, and the rivets are used to place workpieces; The workpiece limiting structure includes at least one limiting block and a plurality of elastic plungers arranged on the limiting block. The limiting block is fixed on the base. The elastic plungers are arranged along a horizontal plane and are used to position and clamp a plurality of workpieces placed in sequence up and down.

2. The pressure riveting jig according to claim 1, characterized in that: Several elastic plungers are arranged at different heights, and the elastic plungers at different heights are used to position and clamp different workpieces, and the elastic plungers at the same height are used to position and clamp the same workpiece. The center height of the elastic plunger is configured to be able to position and clamp the workpiece both before and after the workpiece is pressed.

3. The pressure riveting jig according to claim 2, characterized in that: At least four elastic plungers are arranged at the same height.

4. The pressure riveting jig according to claim 1 or 2, characterized in that: The outer diameter of the positioning and mounting portion decreases from the bottom to the top.

5. The riveting jig according to claim 4, characterized in that: The outer diameter of the positioning and mounting portion gradually decreases from the bottom to the top.

6. The riveting jig according to claim 4, characterized in that: The maximum outer diameter of the positioning and mounting portion is 0.1 mm to 0.2 mm smaller than the inner hole diameter of the rivet.

7. The pressure riveting jig according to claim 1 or 2, characterized in that: There are multiple limit blocks, which are arranged circumferentially around the central axis of the base, and one or more elastic plungers are arranged on each limit block.

8. The riveting jig according to claim 7, characterized in that: The top end of the limit block is arranged into at least two-step structures, and the elastic plunger is arranged at each step, so that a plurality of the elastic plungers are distributed at different heights.

9. The pressure riveting jig according to claim 1 or 2, characterized in that: It also includes a pressure block arranged opposite to the base, the pressure block is used to be connected to a riveting device, and the riveting device is used to drive the pressure block to approach or move away from the base; when the pressure block is driven to move close to the base, the pressure block is used to contact the uppermost workpiece, and then press down the uppermost workpiece until multiple workpieces are riveted and fixed.

10. The riveting jig according to claim 9, characterized in that: A side of the pressing block facing the base is provided with a space-avoiding structure, and the space-avoiding structure is used to avoid the step at the top of the limiting block.

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