CN222403295U - Riveting fixture - Google Patents

Abstract

The utility model provides a press riveting jig which comprises a base, a workpiece limiting structure and a rivet mounting structure, wherein the rivet mounting structure comprises a plurality of positioning columns, the positioning columns are arranged in an inner side operation area defined by the workpiece limiting structure, the bottom ends of the positioning columns are fixed on the base, the top ends of the positioning columns are positioning mounting parts, the connecting parts of the bottoms of the positioning mounting parts are step surfaces, the positioning mounting parts are used for sleeving rivets, the rivets are used for placing workpieces, 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 used for positioning and clamping a plurality of workpieces which are placed up and down in sequence, and the arrangement can ensure the position accuracy of the workpieces, limit the freedom degree of the workpieces, further avoid the problem of flash, simultaneously reduce the press riveting process, improve the production efficiency and reduce the production cost.

Description

Press riveting jig

Technical Field

The utility model relates to the technical field of riveting processing of semiconductor products, in particular to a press riveting jig capable of avoiding rivet flash.

Background

In the prior art, a workpiece (such as a shell, a base plate and a cover plate) needs to be manually rocked, so that the workpiece and the riveting jig are concentric, and then the riveting equipment is operated to downwards press to rivet the workpiece. The mode has the difference and limitation of manual operation, can not quantify the operation method of an operator, and is easy to shake in place, so that the problem of flash is caused. In other words, the traditional press riveting jig cannot position and clamp the workpiece, manual operation is needed, positioning is inaccurate, and the workpiece is easy to move in the press riveting process to generate flash.

It should be noted that the information disclosed in this background section of the application is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of utility model

Accordingly, the present utility model is directed to a press riveting tool capable of positioning and clamping a workpiece to eliminate flash of a semiconductor product, reduce press riveting process, and reduce manufacturing cost.

In order to achieve the above purpose, the utility model provides a press riveting jig, which comprises a base, a workpiece limiting structure and a rivet mounting structure;

The rivet mounting structure comprises a plurality of positioning columns, wherein the positioning columns are arranged in an inner side operation area defined by the workpiece limiting structure, the bottom ends of the positioning columns are fixed on the base, the top ends of the positioning columns are positioning mounting parts, the bottom connection parts of the positioning mounting parts are step surfaces, the positioning mounting parts are used for sleeving rivets, and the rivets are used for placing workpieces;

The workpiece limiting structure comprises at least one limiting block and a plurality of elastic plungers arranged on the limiting block, wherein the limiting block is fixed on the base, and the elastic plungers are arranged along a horizontal plane and are used for positioning and clamping a plurality of workpieces which are placed up and down in sequence.

Optionally, the plurality of elastic plungers are arranged at different heights, the elastic plungers at different heights are used for positioning and clamping different workpieces, the elastic plungers at the same height are used for positioning and clamping the same workpiece, and the central height of the elastic plungers is configured to be capable of positioning and clamping the workpiece before and after the workpiece is pressed.

Optionally, at least four elastic plungers are disposed at the same height.

Optionally, the outer diameter of the positioning mounting part decreases from the bottom to the top.

Optionally, the outer diameter of the positioning mounting part gradually decreases from the bottom to the top.

Optionally, the maximum outer diameter of the positioning installation part is 0.1 mm-0.2 mm smaller than the hole diameter of the rivet inner hole.

Optionally, the number of stopper is a plurality of, and a plurality of the stopper is around the central axis of base is arranged along circumference, every the stopper is last to be provided with one or more the elasticity plunger.

Optionally, the top end of the limiting block is arranged into at least two-stage step structures, and the elastic plungers are arranged at each step, so that a plurality of elastic plungers are distributed on different heights.

Optionally, the press riveting jig further comprises a press block arranged opposite to the base, the press block is used for being connected with a press riveting device, the press riveting device is used for driving the press block to be close to or far away from the base, and when the press block is driven to be close to the base to move, the press block is used for contacting the uppermost workpiece, and then the uppermost workpiece is pressed down until a plurality of workpieces are riveted and fixed.

Optionally, the briquetting just is provided with the clearance structure to the one side of base, the clearance structure is used for dodging the step of stopper top department.

In the press riveting jig provided by the utility model, a plurality of workpieces which are sequentially placed up and down can be positioned and clamped through the plurality of elastic plungers, so that the arrangement can ensure that each workpiece is accurately centered with the press riveting jig, ensure the position precision of the workpiece, limit the degree of freedom of the workpiece, and maintain the stability of the workpiece position, thereby avoiding flash caused by inaccurate positioning and dislocation of the workpiece, simultaneously omitting the steps of placing the dispensing jig and dispensing, and omitting the step of manually shaking the workpiece to make the workpiece concentric with the jig, so that the overall process is reduced, the production efficiency is further improved, the manual error is reduced, and the production cost is reduced.

In further improvement, through the design of location installation department for the external diameter reduces from the bottom to the top direction, can avoid pressing the dead emergence of rivet upper portion and location installation department card after riveting like this to make the product take out smoothly.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is apparent that the drawings in the following description are only some embodiments of the application.

FIG. 1 is a schematic diagram of a press riveting tool according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a base and a workpiece limiting structure disposed on the base according to an embodiment of the utility model;

FIG. 3 is a schematic view of a base and rivet mounting structure disposed on the base according to an embodiment of the present utility model;

FIG. 4 is a schematic view illustrating a structure of a stopper according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the structure of an elastic plunger according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a positioning post according to an embodiment of the present utility model;

FIG. 7 is a schematic view of the top end of a positioning post according to an embodiment of the present utility model;

FIG. 8 is a schematic view of the structure of a briquette in an embodiment of the utility model;

FIG. 9 is a schematic view of the bottom view of the bump stop block of FIG. 8;

FIG. 10 is a schematic diagram of the design of the center height of the spring plunger in an embodiment of the utility model, wherein the solid line illustrates the uppermost workpiece before bonding and the dotted line illustrates the uppermost workpiece after bonding.

Wherein the reference numerals are as follows:

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-press block and 41-void-avoiding structure.

Detailed Description

As described in the background art, in the prior art, the workpiece needs to be manually rocked to be concentric with the press riveting jig. In the conventional method, the substrate is placed in the dispensing jig, the housing is placed in the dispensing jig, the substrate and the housing are pre-fixed to form an integral structure, and then the integral structure of the pre-fixed substrate and the housing is placed in the riveting jig, so that the substrate and the housing are concentric with the riveting jig by manually shaking the integral structure of the substrate and the housing. In this way, more manual operation steps are needed, and a special dispensing jig is needed to be provided, so that the operation is complex, the cost is high, the positioning is inaccurate, the freedom degree of the base plate and the shell cannot be limited in the press riveting process, and the problem of flash is caused.

Therefore, the utility model provides a novel press riveting jig which can position and clamp a workpiece, so that the flash problem of a semiconductor product during riveting is eliminated, the press riveting process is reduced, the manufacturing cost is reduced, and the production efficiency is improved.

The press riveting jig provided by the utility model is further described in detail below with reference to the accompanying drawings. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model. It will be appreciated that relative terms such as "above," "below," "top," "bottom," "above," and "below" as illustrated in the figures may be used to describe various element relationships to one another. These relative terms are intended to encompass different orientations of the element in addition to the orientation depicted in the figures. For example, if the device is inverted relative to the view in the drawings, an element described as "above" another element, for example, will now be below the element. Herein, three directions of the press-riveting jig are indicated by rectangular coordinate axes, in which x-axis and y-axis are arranged on a horizontal plane and z-axis is arranged on a vertical plane.

Fig. 1 is a schematic structural diagram of a press riveting jig according to an embodiment of the utility model, as shown in fig. 1, the press riveting jig includes a base 1, and a workpiece limiting structure 2 and a rivet mounting structure 3 disposed on the base 1. The rivet mounting structure 3 includes a plurality of positioning columns 31, and the positioning columns 31 are uniformly distributed in an inner working area defined by the workpiece limiting structure 2. The inner working area refers to a space defined by one side of the workpiece limiting structure 2, which is close to the central axis of the base 1, and the space is used as a working area for workpiece press riveting.

The number of studs 31 should be determined based on the number of rivets on the workpiece. In the specific example, the number of the positioning posts 31 is four, but may not be limited thereto in practice. The positioning column 31 is used for supporting a mounting rivet (not shown), and the bottom end of the positioning column 31 is fixed on the base 1, but the fixing manner is not limited thereto, and may be detachable or non-detachable.

Referring to fig. 3 and 6-7, the top end of the positioning column 31 is a positioning mounting portion 32, the bottom connection portion of the positioning mounting portion 32 is a step surface 33, the step surface 33 can support a rivet, the rivet is first sleeved on the positioning mounting portion 32, then a workpiece is placed on the rivet, and when the workpiece is placed, a rivet hole on the workpiece is opposite to the rivet.

Referring back to fig. 1 and 2, the workpiece limiting structure 2 includes at least one limiting block 21 and a plurality of elastic plungers 22 disposed on the limiting block 21. The stopper 21 is fixed to the base 1, for example, detachably fixed or non-detachably fixed, and the specific fixing manner is not limited. In addition, the elastic plungers 22 are disposed along a horizontal plane and are used for positioning and clamping a plurality of workpieces placed one above the other. In other words, two or more workpieces are positioned and clamped with a number of resilient plungers 22. After a plurality of workpieces are positioned and clamped, the workpieces are riveted and fixed by rivets.

Also, the number of the stoppers 21 may be one, two, three or more, and the specific number is not limited. When the number of the stoppers 21 is plural, the plural stoppers 21 are circumferentially arranged around the central axis of the base 1, and one or plural elastic plungers 22 may be provided on each stopper 21. In a specific example, referring to fig. 2 with emphasis, the four corners of the base 1 are each provided with a stopper 21, and the stopper 21 at each corner is disposed along two sides of the corner, that is, the stopper 2 at each corner is disposed along the x-axis and the y-axis directions, respectively. Optionally, the number of the limiting blocks 21 is eight, two limiting blocks 2 are respectively arranged at four corners of the base 1, and the two limiting blocks 21 at each corner are respectively arranged along the directions of the x axis and the y axis of the corner, so that enough points are provided on the periphery of the workpiece to install the elastic plunger 22. It should be noted that, when the workpiece limiting structure 2 employs a plurality of limiting blocks 21, processing and assembly are facilitated.

The number of the elastic plungers 22 is set according to actual needs, and the specific number and the specific positions of the elastic plungers 22 can ensure that the workpiece is stressed uniformly, so that the workpiece is concentric with the riveting jig, and the workpiece does not incline or move in the riveting process. Thus, a number of spring plungers 22 provide accurate positioning of the workpiece and limit the degrees of freedom of movement of the workpiece in the x-axis and y-axis directions and rotational freedom about the z-axis.

Taking riveting of two workpieces as an example, the specific operation is that a rivet is firstly placed at the top end of a positioning column 31 and sleeved on a positioning installation part 32, then the workpiece I is placed on the rivet, the elastic plunger 22 automatically positions and clamps the workpiece I while the workpiece I is placed, so that the workpiece I and a riveting jig keep concentric and cannot move forwards and backwards and leftwards and rightwards, then the workpiece II is placed on the workpiece I, the elastic plunger 22 automatically positions and clamps the workpiece II while the workpiece II and the riveting jig keep concentric and cannot move forwards and backwards and leftwards and rightwards, after all the workpieces are positioned and clamped, the riveting equipment is operated to rivet and fix the two workpieces, and after the riveting is completed, the workpiece I and the riveting jig are withdrawn, and then the two workpieces fixed by the riveting are taken out of the riveting jig.

Therefore, the elastic plunger 22 is used on the riveting jig, so that each workpiece and the riveting jig can be ensured to be accurately centered, the position accuracy of the workpiece is ensured, the degree of freedom of the workpiece can be limited, the stability of the workpiece position is maintained, the workpiece is prevented from being shifted in the machining process, the problem of flash caused by inaccurate positioning and dislocation of the workpiece is avoided, the material control positioning is facilitated, flash cannot be caused due to the technical difference of operators, the step of placing the dispensing jig and dispensing can be omitted, the step of manually shaking the workpiece to enable the workpiece and the jig to be concentric is omitted, the overall process is reduced, the production efficiency is improved, the manual error is reduced, and the production cost is reduced. In addition, the elastic plunger 22 has simple structure and convenient positioning and clamping, can realize positioning and clamping of various workpieces, and is flexible and convenient to use.

The specifications of the elastic plungers 22 are not particularly limited, and the elastic plungers 22 of an appropriate specification may be selected according to actual needs.

Several spring plungers 22 may be positioned at the same level to facilitate positioning and clamping of all work pieces by the spring plungers 22 at the same level.

Preferably, the elastic plungers 22 are arranged at different heights, the elastic plungers 22 at different heights are used for positioning and clamping workpieces at different heights, and the elastic plungers 22 at the same height are used for positioning and clamping the same workpiece at the corresponding height, so that the positioning is more accurate and the use is more convenient.

For example, when two workpieces are provided, all the elastic plungers 22 are arranged at the same height, so that the upper and lower workpieces can be positioned and clamped at the same time, or the elastic plungers 22 are arranged at different heights and are arranged at two layers, the upper-layer elastic plungers 22 position and clamp the upper-layer workpieces, and the lower-layer elastic plungers 22 position and clamp the lower-layer workpieces.

For example, when the workpieces are three, all the elastic plungers 22 are arranged at the same height, and can simultaneously position and clamp the three workpieces, or the elastic plungers 22 are arranged at different heights and are three layers, the uppermost elastic plunger 22 positions and clamps the uppermost workpiece, the middle elastic plunger 22 positions and clamps the middle workpiece, the lowermost elastic plunger 22 positions and clamps the lowermost workpiece, or the elastic plungers 22 are distributed at two layers up and down, and the two layers of elastic plungers 22 provide positioning and clamping for the three workpieces, at the moment, two workpieces are positioned and clamped by the elastic plungers 22 at the same height, and the other workpiece is positioned and clamped by the elastic plungers 22 at different heights.

Each workpiece can be positioned and clamped practically by at least two elastic plungers 4, more suitably three, four or more elastic plungers 4 are used, so that the positioning accuracy is higher and the workpiece stability is better. Preferably, at least four elastic plungers 22 are disposed at the same height, and at least four elastic plungers 22 may be rectangular and four-point distributed. More preferably, eight elastic plungers 22 are provided at the same height. The positioning mode of four-point distribution or eight-point distribution can realize high-precision positioning, and meets the positioning switching and high-quality production requirements of the press riveting jig of the semiconductor product.

Referring to fig. 2, in a specific example, two workpieces are provided, and the elastic plungers 22 are vertically distributed in two layers, the number of the elastic plungers 22 in each layer is eight, the eight elastic plungers 22 respectively provide acting forces in the x-axis direction and the y-axis direction, and specific points of the eight elastic plungers 22 can be set according to practical situations, including but not limited to the points illustrated in the figure.

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

Further, during the process of pressing the rivet, the uppermost workpiece (e.g., workpiece two) is pressed downward, so that the height will change accordingly, and at this time, it is necessary to ensure that the elastic plunger 22 can contact the uppermost workpiece before and after pressing to provide positioning and clamping. Therefore, when the upper workpiece is positioned, the height of the elastic plunger 22 needs to be set reasonably, as shown in fig. 10, based on the height h1 before pressing the upper workpiece, the height h2 after pressing the upper workpiece and the thickness t of the uppermost workpiece, the center height h of the elastic plunger 22 is set, wherein h < h1+t, and < h2+t, h2< h1. In this way, the elastic plunger 22 is able to position and clamp the workpiece before and after the workpiece is pressed, which is sufficient to ensure certainty of the product placement position and portability of the product.

There are many ways to fix the elastic plunger 22, such as press-in fixation or screw locking fixation. Specifically, referring to fig. 4, the stopper 21 is provided with plunger mounting holes 211, and the number of the plunger mounting holes 211 is identical to the number of the elastic plungers 22. The plunger mounting hole 211 may be a smooth hole (unthreaded hole) or a threaded hole.

Referring to fig. 5, the elastic plunger 22 includes a plunger body 221, a ball head 222, and a spring (not shown) embedded in the plunger body 221, wherein the ball head 222 protrudes from the plunger body 221, and the movement of the ball head 222 is realized by means of the expansion and contraction of the spring. When the plunger body 221 of the elastic plunger 22 is mounted, the plunger body 221 can be fixed by inserting the plunger body 221 into the plunger mounting hole 211 of the stopper 21. In practice, the height of the protrusion of the ball head 222 of each spring plunger 22 from the plunger body 221 is uniform for ease of use.

Further, there may be a problem in that the product is difficult to take out after the riveting. The riveting device comprises a workpiece, a positioning installation part, a positioning assembly part, a rivet, a positioning assembly part and a positioning assembly part. Although the positioning installation part and the inner hole of the rivet are in clearance fit before press riveting, the traditional positioning installation part is designed into a cylinder with equal diameter, so that the positioning installation part is blocked, because the workpiece is shrunk inwards at the joint of the rivet after press riveting, the shrinkage mainly occurs at the upper part of the rivet, and the upper part of the rivet is affected by the shrinkage workpiece to be clung to the positioning installation part.

Specifically, taking the riveting of the two workpieces as an example, the problem that the joint of the rivet and the workpiece II is shrunk may occur in the riveting process, the inner hole at the upper part of the rivet is reduced after the workpiece II is shrunk, the traditional positioning and mounting part is an equal-diameter cylinder, and even if a gap is reserved before the riveting, the gap is insufficient to offset the shrinkage, so that the phenomenon of upper limit tightening and lower limit loosening of the rivet occurs after the workpiece II is shrunk. At this time, if the gap between the rivet inner hole and the equal diameter cylinder is enlarged, the shaking between the rivet inner hole and the equal diameter cylinder is larger, and the positioning is inaccurate.

To solve this technical problem, in a further improvement, the positioning and mounting portion 32 is provided such that the outer diameter decreases from the bottom to the top thereof, and the outer diameter may be gradually decreased or may be decreased before being maintained. So configured, the positioning mounting portion 32 can provide sufficient space to avoid jamming while providing effective positioning of the rivet in the process of workpiece pressing.

Referring to fig. 3 and 6 to 7, in a preferred embodiment, the positioning and mounting portion 32 has a tapered structure as a whole, and the outer diameter gradually decreases from the bottom to the top.

In order to smoothly assemble the rivet, the maximum outer diameter D1 of the positioning mounting portion 32 is smaller than the diameter of the rivet inner hole, and a larger gap can be formed between the positioning mounting portion 32 and the rivet inner hole due to the variable diameter of the positioning mounting portion 32, so that after the rivet is pressed and riveted, the upper portion of the rivet can still keep a clearance fit relationship with the variable diameter positioning mounting portion 32 although the rivet is affected by the inward shrinkage of the workpiece, and the upper portion of the rivet cannot be clung to the positioning mounting portion 32 so as to take out the product conveniently.

The clearance between the positioning mounting portion 32 and the rivet hole should be appropriate, and if the clearance is too large, positioning accuracy is affected, and if the clearance is too small, jamming is likely. For this purpose, the maximum outer diameter D1 of the positioning attachment portion 32 is preferably 0.1mm to 0.2mm smaller than the rivet hole diameter. In a specific example, the rivet hole diameter is 6.4.+ -. 0.05mm, while the maximum outer diameter D1 of the locating mounting portion 32 is 6.3.+ -. 0.05mm, and the minimum outer diameter D2 of the locating mounting portion 32 is 6.2.+ -. 0.05mm. The height of the positioning and mounting portion 32 is not limited, and in general, the height of the positioning and mounting portion 32 does not exceed the height of the stopper 21.

Referring to fig. 1, and referring to fig. 8 to fig. 9, in some embodiments of the present utility model, the press riveting jig further includes a pressing block 4, where the pressing block 4 is disposed opposite to the base 1. The pressing block 4 is used for being connected with the riveting equipment, the pressing block 4 is driven by the riveting equipment to be close to or far away from the base 1, and when the pressing block 4 is driven to be close to the base 1 to move, the pressing block 4 contacts the uppermost-layer workpiece, and then the uppermost-layer workpiece is pressed down until a plurality of workpieces are riveted and fixed. It should be noted that the pressing block 4 may be used as an external structure instead of being included in the press riveting jig provided by the present utility model.

The pressing block 4 cannot be too small in the actual use process, so that the contact area of the pressing block is increased as much as possible, and the stress of a workpiece is uniform. In addition, after the workpiece is positioned and clamped on the press riveting jig, the height of the uppermost workpiece can be higher than the height of the limiting block 21, can be flush with the height of the limiting block 21, or is lower than the height of the limiting block 21.

In a specific example, the height of the limiting block 21 is higher than the height of the uppermost workpiece, and in this case, in order to enable the pressing block 4 to smoothly contact with the uppermost workpiece, a clearance structure 41 needs to be provided on the pressing block 4, see fig. 8 and 9.

In some embodiments of the present application, as shown in fig. 2 and 4, the top end of the limiting block 21 is provided with at least two steps 212, and the number of steps is consistent with the number of layers of the elastic plungers 22, so that the elastic plungers 22 are distributed at different heights by providing the elastic plungers 22 at each step 213 of the step 212.

In some embodiments of the present application, as shown in fig. 8 and 9, a plurality of void structures 41 are disposed on a surface of the pressing block 4 facing the base 1, each void structure 41 may be a through hole or a blind hole, and during the pressing of the pressing block 4, the void structures 41 are aligned with the steps 213 on the limiting block 21, and the steps 213 are allowed to be embedded into the void structures 41, so as to avoid the limiting block 21, so that the pressing block 4 can smoothly press the workpiece to realize riveting. Note that the resilient plunger 22 does not enter the clearance structure 41.

The clinching step is further described below in connection with several embodiments, wherein 2 workpieces are employed, each positioned and clamped by 8 spring plungers 22 of corresponding height, and 2 workpieces are secured by 4 rivets. The specific operation is as follows:

step 1, respectively installing 4 rivets on the positioning installation parts 32 of the corresponding positioning columns 31;

Step 2, installing a first workpiece (such as a shell or a cover plate) after the rivet is installed, wherein the first workpiece is placed on the rivet, and in the placing process, 8 elastic plungers 22 in the lower layer retract inwards after being subjected to the pressure of the first workpiece, so that when the first workpiece is installed in place, the first workpiece is automatically restored to the central position of the rivet under the action of the acting force of each elastic plunger 22, and the first workpiece and the rivet are kept concentric;

Step 3, installing a second workpiece (such as a substrate) after the first workpiece is installed, namely placing the second workpiece on the first workpiece, wherein in the process, 8 elastic plungers 22 in the upper layer are retracted inwards after being subjected to the pressure of the second workpiece, and then when the second workpiece is installed in place, the second workpiece is automatically reset to the center position of the rivet under the action of the acting force of each elastic plunger 22, so that the second workpiece and the rivet are kept concentric;

And 4, after the second workpiece is installed, operating the riveting equipment to drive the pressing block 4 to press down and contact the second workpiece, and further riveting and fixing the two workpieces through rivets, wherein when the whole height of the limiting block 21 is higher than that of the second workpiece, the pressing block 4 avoids a step 213 (a second step) on the limiting block 21 through the clearance structure 41, and smoothly moves down to a target position to finish riveting.

Finally, aiming at the above-mentioned example, 6 groups of riveting samples are provided to verify the flash rate, and the results show that the flash does not appear at the rivet joint of the 6 groups of samples, so that the press riveting jig provided by the utility model can better solve the product flash problem and has good effect.

The press riveting jig 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, and in some application scenes, even if the size of the shell in the x and y directions is larger than that of the substrate in the x and y directions, the problem of difficult taking and placing of the shell can be solved by means of the self-adaptive positioning of the elastic plunger 22, so that the positioning mode provided by the utility model is suitable for workpieces with various shapes and sizes.

It should be noted that, in the present description, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different manner from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. And, while the present invention has been disclosed in terms of preferred embodiments, the above embodiments are not intended to limit the present invention. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

It should be further appreciated that the terms "first," "second," "third," and the like in the description are used merely for distinguishing between various components, elements, steps, etc. in the description and not for indicating a logical or sequential relationship between various components, elements, steps, etc., unless otherwise indicated. It should also be understood that, as used herein and in the appended specification, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. For example, reference to "a step" or "an apparatus" means a reference to one or more steps or apparatuses, and may include sub-steps as well as sub-apparatuses.

Claims (10)

1. The press riveting jig is characterized by comprising a base, a workpiece limiting structure and a rivet mounting structure;

The rivet mounting structure comprises a plurality of positioning columns, wherein the positioning columns are arranged in an inner side operation area defined by the workpiece limiting structure, the bottom ends of the positioning columns are fixed on the base, the top ends of the positioning columns are positioning mounting parts, the bottom connection parts of the positioning mounting parts are step surfaces, the positioning mounting parts are used for sleeving rivets, and the rivets are used for placing workpieces;

The workpiece limiting structure comprises at least one limiting block and a plurality of elastic plungers arranged on the limiting block, wherein the limiting block is fixed on the base, and the elastic plungers are arranged along a horizontal plane and are used for positioning and clamping a plurality of workpieces which are placed up and down in sequence.

2. The press riveting jig of claim 1, wherein a plurality of the elastic plungers are disposed at different heights, the elastic plungers at different heights are used for positioning and clamping different workpieces, the elastic plungers at the same height are used for positioning and clamping the same workpiece, and a center height of the elastic plungers is configured to be capable of positioning and clamping the workpiece before and after the workpiece is pressed.

3. The press riveting jig of claim 2 wherein at least four of the spring plungers are disposed at the same height.

4. The clinching jig of claim 1 or 2, wherein the outer diameter of the positioning mounting portion decreases from the bottom portion thereof toward the top portion.

5. The press riveting jig of claim 4, wherein the outer diameter of the positioning mounting portion gradually decreases from the bottom portion thereof toward the top portion.

6. The press riveting jig of claim 4, wherein the maximum outer diameter of the positioning mounting portion is 0.1 mm-0.2 mm smaller than the rivet inner hole aperture.

7. The press riveting jig according to claim 1 or 2, wherein the number of the stoppers is plural, the plural stoppers are circumferentially arranged around the central axis of the base, and one or plural elastic plungers are provided on each stopper.

8. The press riveting jig of claim 7, wherein the top end of the stopper is provided in at least a two-stage step structure, and the elastic plungers are provided at each step so that a plurality of the elastic plungers are distributed at different heights.

9. The press riveting jig according to claim 1 or 2, further comprising a press block disposed opposite to the base, wherein the press block is used for being connected with a press riveting device, the press riveting device is used for driving the press block to be close to or far away from the base, and when the press block is driven to move close to the base, the press block is used for contacting an uppermost workpiece and further pressing the uppermost workpiece until a plurality of workpieces are riveted and fixed.

10. The press riveting jig of claim 9, wherein a clearance structure is provided on a surface of the press block facing the base, and the clearance structure is used for avoiding a step at the top end of the limiting block.