Rivet pressing die

Abstract

The utility model discloses a pressing rivet die which comprises an upper die assembly, a lower die assembly, a lower die assembly and a riveting assembly. The upper die assembly comprises an upper die plate and a pressing head arranged on the upper die plate. The lower die assembly comprises a lower die plate and a rivet which is inserted into a concave hole of the lower die plate in a limiting manner; at least one positioning pin is arranged on the lower template, and a material plate is sleeved on the rivet and the positioning pin so as to be positioned and mounted on the lower template; the rivet comprises a body and a rivet sleeve arranged at the upper end of the table top of a limiting table of the body, and a plurality of supporting protruding blocks surrounding the rivet sleeve at equal intervals are further arranged at the upper end of the table top of the limiting table. The material plate is positioned above the table surface of the limiting table; the upper die plate moves downwards relative to the lower die plate, and the pressing head acts on the rivet sleeve and drives the rivet sleeve to deform towards the lower die plate so as to abut against the supporting protruding block in a limited mode to complete rivet pressing. According to the technical scheme, the die structure can complete press riveting at a time, the problem of poor coaxiality of products can be solved, and the press riveting strength and performance can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a pressure riveting mold. Background Art

[0002] Traditional riveting dies usually use simple tooling, with only a lower template and a pressure head. They use two-time riveting, simply placing the rivet and the plate on the lower template. The first time, the rivet is pressed onto the lower template table by the pressure head to press the rivet and the part together; in order to improve the riveting strength, the second time, the rivet is repositioned and riveted again to make the performance and strength more stable. Due to the two times of riveting, the two placement positions cannot be guaranteed to be exactly the same, the coaxiality of the processed product is prone to errors, the rivet is riveted crooked relative to the hole on the plate, and it tilts to the left or right, resulting in spatial dislocation, which does not meet customer needs. It is also difficult to rework later, which consumes manpower and material resources and increases costs; secondly, the shape of the deformed part of the rivet completed by riveting is also extremely irregular, the riveting effect is unstable, and it is very easy to loosen later.

[0003] Therefore, in order to meet customer needs and reduce company costs, the existing riveting dies need to be further improved and upgraded. Utility Model Content

[0004] The utility model provides a riveting die with simple structure, simple manufacturing, easy realization and low cost. The die structure can complete the riveting in one time, which can not only improve the problem of poor coaxiality of the product, but also ensure the strength and performance of the riveting. The main technical solutions are as follows:

[0005] A riveting die, an upper die assembly, which includes an upper die plate and a pressing head arranged on the upper die plate; a lower die assembly, which includes a lower die plate and a rivet limitedly inserted in a concave hole of the lower die plate; at least one locating pin is provided on the lower die plate, and a material plate is sleeved on the rivet and the locating pin to be positioned and installed on the lower die plate; the rivet includes a main body and a rivet sleeve on the upper end of a limiting table surface of the main body, and a plurality of supporting protrusions surrounding the rivet sleeve at equal intervals on the upper end of the limiting table surface; the material plate is located above the limiting table surface; the upper die plate descends relative to the lower die plate, and the pressing head acts on the rivet sleeve to drive it to deform toward the lower die plate, so as to limit and abut against the supporting protrusion to complete the riveting.

[0006] Preferably, the limiting platform has a plurality of grooves, each of which is located between each of the supporting protrusions and is arranged around the rivet sleeve at equal intervals.

[0007] Preferably, the rivet sleeve is coaxially arranged with the body of the rivet, and the supporting protrusion is arranged around the circumference of the axis.

[0008] Preferably, the upper mold assembly further comprises a presser, and the presser is elastically connected to the upper mold plate.

[0009] Preferably, it further comprises a sliding guide post and a sliding sleeve, wherein the sliding guide post is arranged on the lower template, the sliding sleeve is arranged on the upper template, and the sliding sleeve is slidably arranged on the sliding guide post.

[0010] Preferably, the sliding guide post and the sliding sleeve are respectively arranged on the left and right sides of the lower template and the upper template.

[0011] Preferably, two rivets and two locating pins are provided respectively, and the horizontal projection connecting line of the two rivets and two locating pins is arranged in a "quadrilateral".

[0012] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0013] (1) The utility model provides a riveting die with a simple structure, simple manufacturing, easy implementation and low cost. The die structure can complete riveting in one go, which can not only improve the problem of poor coaxiality of the product, but also ensure the strength and performance of the riveting. When the die of this scheme is in operation, the material plate is pre-set on the rivet and the positioning pin to complete the positioning, improve the riveting accuracy, and solve the problems of poor coaxiality of the product, left-leaning, right-leaning, and spatial misalignment of the riveting; during the riveting process, the rivet sleeve is deformed toward the lower template under the action of the pressure head, and the deformed part is limited to abut against the supporting protrusion, and the supporting protrusion is used to support, support and limit, which can not only make the deformed part press the material plate tighter and more firmly, and more stable, so that the material plate is less likely to loosen, but also make the shape of the deformed part more standardized, thereby improving the aesthetics of the product.

[0014] (2) In the present technical solution, a groove structure is provided on the limit table, which can reduce the weight of the rivet to a certain extent while ensuring the quality of riveting, and can also reduce costs; and the groove structure is arranged at equal intervals, which can allow the rivet to maintain a certain balance without tilting.

[0015] (3) In the present technical solution, the rivet sleeve is coaxially arranged with the rivet body, and the supporting protrusion is arranged around the axis to ensure the coaxiality of the riveting pressure, and the shape of the deformed part of the rivet is further standardized under the action of the surrounding supporting protrusion, thereby ensuring the aesthetics.

[0016] (4) In the present technical solution, the material plate can be pressed onto the lower template by a press to prevent vibration during the riveting process, which would affect the riveting effect.

[0017] (5) In the present technical solution, two rivets and two locating pins are provided respectively, and the horizontal projection connecting line of the rivets and the locating pins is arranged in a "quadrilateral" shape. This ensures that after the material sheet is pre-positioned on the rivets and the locating pins, the material sheet can be effectively restricted and constrained on all sides. During the riveting process, the material sheet will not be lifted up by force, thereby ensuring the riveting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the rivet in the embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model before riveting;

[0021] Figure 3 for Figure 2 A cross-sectional schematic diagram of

[0022] Figure 4 for Figure 3 A partial enlarged view of part A shown;

[0023] Figure 5 This is a schematic diagram of the structure of the embodiment of the utility model after riveting;

[0024] Figure 6 for Figure 5 A cross-sectional schematic diagram of

[0025] Figure 7 for Figure 6 A partial enlarged view of part B is shown.

[0026] The reference numerals in the accompanying drawings are explained as follows: 1. Upper die assembly; 11. Upper die plate; 12. Press head; 13. Press; 2. Lower die assembly; 21. Lower die plate; 22. Rivet; 221. Main body; 221A. Limiting platform; 221B. Supporting protrusion; 221C. Groove; 222. Rivet sleeve; 23. Locating pin; 3. Sliding guide column; 4. Sliding sleeve; C. Material plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0029] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0030] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0031] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0032] See also Figures 1 to 7 .

[0033] This embodiment provides a riveting die, which has a simple structure, is easy to manufacture, easy to implement and low cost. The die structure can complete the riveting in one go, which can not only improve the problem of poor coaxiality of the product, but also ensure the riveting strength and performance, and improve reliability. The die structure mainly includes an upper die assembly 1 and a lower die assembly 2; wherein,

[0034] The upper die assembly 1 comprises an upper die plate 11 and a pressing head 12 disposed on the upper die plate 11. The pressing head 12 has a concave cavity, and the concave cavity is designed and selected according to the shape of the rivet 22 to be riveted;

[0035] The lower mold assembly 2 includes a lower mold plate 21 and a rivet 22 which is limitedly inserted into the concave hole of the lower mold plate 21; the rivet 22 mainly includes a body 221 and a rivet sleeve 222, wherein the body 221 includes a limiting platform 221A and a plurality of supporting protrusions 221B and a groove 221C. When the rivet 22 is inserted into the concave hole of the lower mold plate 21, the limiting platform 221A can just limit the rivet 22 axially to prevent the entire rivet 22 from falling into the concave hole and position the rivet 22.

[0036] At least one positioning pin 23 is provided on the lower template 21. The material sheet C can be simultaneously sleeved on the rivet 22 and the positioning pin 23 to be positioned and installed on the lower template 21. The positioning is performed by the mutual cooperation of the positioning pin 23 and the rivet 22. This method can reduce a certain number of positioning pins 23 and reduce production costs; see Figure 1 The rivet sleeve 222 is located at the upper end of the limiting platform 221A, and a plurality of supporting protrusions 221B are arranged around the rivet sleeve 222 at equal intervals on the upper end of the limiting platform 221A; Figure 2 Before riveting, the sheet C is sleeved on the rivet 22 and the positioning pin 23 so that the sheet C is located above the surface of the limiting platform 221A.

[0037] When riveting, see Figure 7 The upper template 11 moves downward relative to the lower template 21, and the concave cavity of the pressing head 12 acts on the rivet sleeve 222, driving it to deform toward the lower template 21, so as to limit the contact with the supporting protrusion 221B to complete the riveting; the supporting protrusions 221B arranged around the spacing can evenly provide support, bearing and limiting for the deformed part of the rivet sleeve 222, that is, when the deformed part is deformed by pressure, the deformed part is pressed more compactly and firmly in the pressure cavity between the pressing head 12 and the supporting block, which can make the material sheet C less likely to loosen, and can also make the shape of the deformed part more standardized under the action of the pressure cavity, thereby improving the aesthetics of the product.

[0038] In this embodiment, the grooves 221C on the limiting platform 221A are located between the supporting protrusions 221B and are arranged around the rivet sleeve 222 at equal intervals, thereby reducing the weight of the rivet 22 to a certain extent.

[0039] In this embodiment, in order to ensure processing accuracy, the rivet sleeve 222 is arranged coaxially with the body 221 of the rivet 22, and the supporting protrusion 221B is arranged around the circumference of the axis. The deformed part of the rivet sleeve 222 is supported, supported and limited more evenly by the supporting protrusion 221B.

[0040] In this embodiment, the upper mold assembly 1 also includes a press 13, which is elastically connected to the upper mold plate 11. The press 13 can press the material plate C to perform riveting and prevent the material plate C from displacement and vibration.

[0041] In this embodiment, the sliding guide post 3 and the sliding sleeve 4, the sliding guide post 3 is arranged on the lower template 21, the sliding sleeve 4 is arranged on the upper template 11, the sliding sleeve 4 is slidably arranged on the sliding guide post 3, the sliding guide post 3 and the sliding sleeve 4 are respectively arranged on the left and right sides of the lower template 21 and the upper template 11. When the upper template 11 slides relative to the lower template 21, the sliding sleeve 4 can slide on the sliding guide post 3 to ensure that the entire upper template 11 can move downward in a balanced manner without tilting.

[0042] In this embodiment, two rivets 22 and two locating pins 23 are respectively provided, and the horizontal projection connecting line of the two rivets 22 and the locating pins 23 is arranged in a "quadrilateral", that is, the rivets 22 and the locating pins 23 are respectively located at four positions of the lower template 21, when the material sheet C is sleeved on the rivets 22 and the locating pins 23 for positioning before riveting, the four positions of the material sheet C can be limited at the same time, that is, the material sheet C will not be offset, thereby ensuring the processing accuracy.

[0043] The working principle and use process of this utility model:

[0044] Before riveting, see Figures 1 to 4 , insert two rivets 22 on the lower template 21, and then put the material sheet C on the rivets 22 and the positioning pins 23 at the same time to complete the positioning, so that the material sheet C will not deviate by itself;

[0045] When riveting, refer to Figures 5 to 7 , the upper template 11 is controlled to move downward relative to the lower template 21, and the concave cavity on the pressure head 12 abuts against the rivet sleeve 222. As the upper template 11 continues to move downward and exert force, the rivet sleeve 222 gradually deforms toward the lower template 21, and abuts against the support protrusion 221B to limit the position until the riveting is completed, that is, the force of the pressure head 12 on the rivet sleeve 222 is dispersed on the support protrusion 221B, which can effectively avoid direct action on the lower template 21; finally, the upper template 11 can be controlled to move upward, and the riveted material plate C is taken out from the lower template 21. The utility model has a simple structure, simple manufacturing, easy implementation and low cost. The mold structure can complete the riveting in one time, which can not only improve the problem of poor coaxiality of the product, but also ensure the strength and performance of the riveting. When the mold of the present scheme is in operation, the material plate C is pre-mounted on the rivet 22 and the positioning pin 23 to complete the positioning, thereby improving the riveting accuracy and solving the problems of poor coaxiality of the product, left-leaning, right-leaning, and spatial misalignment of the riveting; during the riveting process, the rivet sleeve 222 is deformed toward the lower template 21 under the action of the pressure head 12, and the deformed part is limitedly abutted against the supporting protrusion 221B. The supporting protrusion 221B is used for support, bearing and limiting, which not only enables the deformed part to press the material plate C tighter, more firmly, and more stably, making the material plate C less likely to loosen, but also makes the shape of the deformed part more standardized, thereby improving the aesthetics of the product.

[0046] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A riveting die, characterized in that: include An upper die assembly, comprising an upper die plate and a pressing head disposed on the upper die plate; The lower die assembly comprises a lower die plate and a rivet inserted into a concave hole of the lower die plate; the lower die plate is provided with at least one positioning pin, and the material plate is sleeved on the rivet and the positioning pin to be positioned and installed on the lower die plate; the rivet comprises a body and a rivet sleeve on the upper end of the limiting table of the body, and the upper end of the limiting table is also provided with a plurality of supporting protrusions surrounding the rivet sleeve at equal intervals; the material plate is located above the limiting table; The upper template moves downward relative to the lower template, and the pressure head acts on the rivet sleeve to drive it to deform toward the lower template so as to limit the contact with the supporting protrusion to complete the pressure riveting.

2. A riveting die according to claim 1, characterized in that: The limiting platform is provided with a plurality of grooves, each of which is located between each of the supporting protrusions and is arranged around the rivet sleeve at equal intervals.

3. A riveting die as claimed in claim 2, characterized in that: The rivet sleeve is coaxially arranged with the rivet body, and the supporting protrusion is arranged around the circumference of the axis.

4. The riveting die according to claim 1, characterized in that: The upper mold assembly also includes a presser, which is elastically connected to the upper mold plate.

5. The riveting die according to claim 1, characterized in that: It also includes a sliding guide post and a sliding sleeve. The sliding guide post is arranged on the lower template, the sliding sleeve is arranged on the upper template, and the sliding sleeve is slidably arranged on the sliding guide post.

6. A riveting die as claimed in claim 5, characterized in that: The sliding guide column and the sliding sleeve are respectively arranged on the left and right sides of the lower template and the upper template.

7. A riveting die according to any one of claims 1 to 6, characterized in that: There are two rivets and two locating pins respectively, and the horizontal projection connection line of the two rivets and two locating pins is arranged in a "quadrilateral".

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