CN210632775U

CN210632775U - Self-discharging rivet-free riveting die

Info

Publication number: CN210632775U
Application number: CN201921715102.6U
Authority: CN
Inventors: 赵树恩; 刘朝海; 冷姚
Original assignee: Chongqing Jiaotong University
Current assignee: Chongqing Jiaotong University
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2020-05-29
Anticipated expiration: 2029-10-14

Abstract

The utility model discloses a self-discharging rivet-free riveting die, which comprises a male die, a female die and a demoulding assembly, wherein the male die is a conical column, the large end of the male die is fixedly arranged below an upper die base, and a blank holder is arranged around the conical surface of the male die; the female die and the male die rotating shaft are fixedly arranged above the lower die holder in a collinear manner, the female die is a cylinder, the top surface of the female die is provided with a groove corresponding to the male die, and the cylindrical surface of the female die is provided with a demoulding assembly in a surrounding manner; the demoulding assembly comprises an elastic seat ring arranged at the root part of the female die in a surrounding mode and a pushing plate arranged above the elastic seat ring. The utility model discloses a from unloading no rivet riveting mould, through a complete no rivet riveting stamping process completion back, the ejecting stripper plate that kick-backs of elastic seat circle will not have rivet riveting to connect ejecting realization automatic discharge, improves production efficiency, stabilizes product quality, simple structure, easy to carry out, the operation of being convenient for, low cost for the production beat alleviates workman intensity of labour.

Description

Self-discharging rivet-free riveting die

Technical Field

The utility model relates to a metal material mechanical connection forming technology technical field, concretely relates to from unloading rivet-free riveting die.

Background

The rivet-free connection riveting is a connection mode of forming an internal embedded connection point with certain tensile strength and shearing strength by adopting pressure equipment (pneumatic or pneumatic hydraulic) and a special die to carry out cold extrusion molding on two or more metal plates, and has the advantages that: 1, the connection point is firm and reliable; no raw material consumption and no auxiliary material is needed; surpass the metal material limitation and the thickness limitation; dot and giant dot connections can be formed; the connection region is free of thermal stress; the protective layer on the surface of the workpiece can not be damaged; no pre-or post-treatment is required, allowing for interlayer and multilayer connections; the working environment is good, no dust, toxic smoke and noise are discharged; simple operation, low consumption and low maintenance cost. Is suitable for the connection of steel plates, stainless steel plates, aluminum plates and non-metal interlayers.

The rivet-free riveting is widely applied in our lives, and typical parts which are commonly connected by the rivet-free riveting are as follows: roof windows, bumpers, exhaust pipes, fuel tanks, brake housings, vehicle doors, instrument frames, engine mounts, engine housings, tail covers, coolers, seats, window winders, mufflers, refrigerator doors, washing machine housings, fan housings, copier housings, computer housings, dentist housings, etc.

But need the manual work to get after the rivet-free riveting shaping among the prior art and can not realize automatic discharge, the manual work is got and can be reduced the production beat, reduces production efficiency, has also increased artifical intensity of labour, operates inconveniently. The utility model discloses a No. CN 208427607U, the name is no rivet riveting mould's utility model patent discloses a no rivet riveting mould with elasticity takes off module its elasticity drawing of patterns piece adopts mechanical structure to realize the drawing of patterns after the riveting is accomplished, and the structure is complicated, and the reliability is poor to damage easily, the cost is higher.

Therefore, in order to solve the above problems, a self-discharging rivet-free riveting die with simple structure, high reliability and low cost is needed, which can realize automatic discharging, accelerate the production takt, improve the production efficiency, reduce the labor intensity of workers and realize simple and rapid operation.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at overcoming the defect among the prior art, provide from unloading no rivet riveting mould, can accomplish the back through a complete no rivet riveting stamping process, the ejecting piece board that pushes away of elastic seat circle resilience will not have rivet riveting to connect ejecting realization automatic discharge, improve production efficiency, stabilize product quality, simple structure, easy to carry out, the operation of being convenient for, low cost for the production beat alleviates workman intensity of labour.

The utility model discloses a self-discharging rivet-free riveting die, which comprises a male die, a female die and a demoulding component, wherein the male die is a conical column, the large end of the male die is fixedly arranged below an upper die base, and a blank holder is arranged around the conical surface of the male die; the female die and the male die rotating shaft are fixedly arranged above the lower die holder in a collinear manner, the female die is a cylinder, the top surface of the female die is provided with a groove corresponding to the male die, and the cylindrical surface of the female die is provided with a demoulding assembly in a surrounding manner; the demoulding assembly comprises an elastic seat ring arranged at the root part of the female die in a surrounding mode and a pushing plate arranged above the elastic seat ring.

Further, the height of the top surface of the pushing plate is slightly higher than that of the top surface of the female die during unloading.

Furthermore, the stripper plate is connected with the lower die holder through a discharging screw, the discharging screw penetrates through a mounting hole of the lower die holder and a through hole of the elastic seat ring to be in threaded connection with the stripper plate, and a reset spring is sleeved on a screw rod section close to the nut and used for adjusting the discharging screw to move relative to the elastic seat ring and the lower die holder.

Further, the mounting hole is a step hole with a small upper part and a large lower part, and one end of the return spring abuts against the step of the step hole at the other end of the nut.

Furthermore, the turning center of the upper die base is provided with a through hole with a big end down, the upper section of the through hole is connected with the die shank in an interference fit manner, and the top end of the die shank is provided with a striking rod.

Further, a backing plate is fixedly arranged in the lower section of the through hole and is fixedly connected with the step surface of the through hole.

Furthermore, the big end of the male die is fixedly connected to the bottom surface rotation center of the mounting seat, the mounting seat is a flat cylinder, and threaded holes are formed in the positions, corresponding to the upper die seat, the mounting seat and the blank holder, of the mounting seat and used for enabling screws to sequentially penetrate into the detachable threaded fixed connection.

Furthermore, the taper of the male die is 5 degrees, the diameter of the small end is 8-10 mm, and the material is high-quality carbon tool steel.

Further, the female die is in clearance fit with the elastic seat ring, the female die is in clearance fit with the pushing plate, and the elastic seat ring is made of elastic rubber.

The utility model has the advantages that: the utility model discloses a from unloading no rivet riveting mould, through a complete no rivet riveting stamping process completion back, the ejecting stripper plate that kick-backs of elastic seat circle will not have rivet riveting to connect ejecting realization automatic discharge, improves production efficiency, stabilizes product quality, simple structure, easy to carry out, the operation of being convenient for, low cost for the production beat alleviates workman intensity of labour.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

Fig. 1 is a schematic structural diagram of the present invention, as shown in the figure, the self-discharging rivet-free riveting die in this embodiment includes a male die 6, a female die 8 and a demolding assembly, the male die 6 is a conical cylinder, the large end of the male die is fixedly mounted below an upper die base 5, a blank holder 7 is arranged around the conical surface of the male die 6, the blank holder 7 is a regular rectangular non-standard component, and the male die 6 and the blank holder 7 are in clearance fit; the female die 8 and the rotating shaft of the male die 6 are fixedly arranged above the lower die holder 11 in a collinear manner, the lower die holder 11 is positioned right below the upper die holder 6, when the riveting die works, the upper die holder 6 presses a workpiece to be riveted downwards in a direction close to the lower die holder 11, the female die 8 is a cylinder, the top surface of the female die is provided with a groove corresponding to the male die 6, and the cylindrical surface of the female die 8 is provided with a demoulding component in a surrounding manner; the demoulding component comprises an elastic seat ring 10 and a stripper plate 9, wherein the elastic seat ring 10 is annularly arranged at the root part (one end connected with a lower die seat 11) of the female die 8, and the stripper plate 9 is arranged above the elastic seat ring 10.

In this embodiment, the height of the top surface of the stripper plate 9 is slightly higher than that of the top surface of the female die 8 during unloading, so that a riveted workpiece can be positioned, and automatic unloading can be realized.

In this embodiment, the stripper plate 9 is connected to the lower die holder 11 through the discharging screw 12, the discharging screw 12 passes through the mounting hole of the lower die holder 11 and the through hole of the elastic seat ring 10 to be in threaded connection with the stripper plate 9, and a return spring is sleeved on a screw section near the nut for adjusting the movement of the discharging screw 12 relative to the elastic seat ring 10 and the lower die holder 11.

In this embodiment, the mounting hole is big end down's step hole, reset spring one end butt in the step of nut other end butt in the step hole, and reset spring is used for providing the pretightning force for being connected of die holder 11 and stripper plate 9, but realizes being connected of elastic movement between stripper plate 9 and the die holder.

In this embodiment, a stepped through hole with a small top and a large bottom is formed in the rotation center of the upper die holder 5, the upper section of the through hole is connected with the die shank 2 in an interference fit manner, the die shank 2 is a press-in die shank 2, a striking rod 1 is formed at the top end of the die shank 2, a pressing component on the upper portion of the striking rod 1 is convenient to press the upper die holder 6, and finally the upper die holder 6 is driven to move downwards to complete riveting.

In this embodiment, a backing plate 3 is fixedly arranged in the lower section of the through hole, and the backing plate 3 is fixedly connected with the step surface of the through hole.

In this embodiment, the big end of the male die 6 is fixedly connected to the bottom surface rotation center of the mounting seat, the mounting seat is a flat cylinder, and threaded holes are formed in the positions corresponding to the upper die base 5, the mounting seat and the blank holder 7 and used for the screws 4 to sequentially penetrate into the detachable threaded fixed connection.

In the embodiment, the taper of the male die 6 is 5 degrees, the diameter of the small end is 8-10 mm, the riveting strength is highest, the riveting quality is best, and the material is high-quality carbon tool steel.

In this embodiment, the female die 8 and the elastic seat ring 10 are in clearance fit, the female die 8 and the stripper plate 9 are in clearance fit, and the elastic seat ring 10 is made of elastic rubber.

In the riveting process without the rivet, the male die 6 applies pressure to the upper plate firstly to enable the upper plate to generate elastic plastic deformation, the male die 6 continues to move downwards to enable the upper plate and the lower plate to deform to fill the grooves, and finally, a lock catch is formed between the upper plate and the lower plate to realize connection and self-locking.

After the riveting process without rivet, the upper die base 6 moves upwards, and simultaneously the elastic seat ring 10 on the lower die base 11 releases pressing force from a compressed state to a natural state to drive the stripper plate 9 and then push out the riveting joint workpiece without rivet.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a from no rivet riveting die of unloading which characterized in that: the die comprises a male die, a female die and a demoulding assembly, wherein the male die is a conical column, the large end of the male die is fixedly arranged below an upper die base, and a blank holder is arranged around the conical surface of the male die in a surrounding manner; the female die and the male die rotating shaft are fixedly arranged above the lower die holder in a collinear manner, the female die is a cylinder, the top surface of the female die is provided with a groove corresponding to the male die, and the cylindrical surface of the female die is provided with a demoulding assembly in a surrounding manner; the demoulding assembly comprises an elastic seat ring arranged at the root part of the female die in a surrounding mode and a pushing plate arranged above the elastic seat ring.

2. The self-discharging rivetless riveting die of claim 1, wherein: the height of the top surface of the pushing plate is slightly higher than that of the top surface of the female die when the pushing plate is used for discharging.

3. The self-discharging rivetless riveting die of claim 1, wherein: the stripper plate is connected with the lower die base through a discharging screw, the discharging screw penetrates through a mounting hole of the lower die base and a through hole of the elastic seat ring to be in threaded connection with the stripper plate, and a reset spring is sleeved on a screw rod section close to the nut and used for adjusting the discharging screw to move relative to the elastic seat ring and the lower die base.

4. The self-discharging rivetless riveting die of claim 3, wherein: the mounting hole is a step hole with a small upper part and a large lower part, and one end of the return spring is abutted against the step of the step hole at the other end of the nut.

5. The self-discharging rivetless riveting die of claim 1, wherein: the upper die base is characterized in that a stepped through hole with a small upper part and a large lower part is formed in the rotation center of the upper die base, the upper section of the through hole is connected with a die handle in an interference fit mode, and a striking rod is formed at the top end of the die handle.

6. The self-discharging rivetless riveting die of claim 5, wherein: a base plate is fixedly arranged in the lower section of the through hole and is fixedly connected with the step surface of the through hole.

7. The self-discharging rivetless riveting die of claim 6, wherein: the big end of the male die is fixedly connected to the bottom surface rotation center of the mounting seat, the mounting seat is a flat cylinder, and threaded holes are formed in the positions, corresponding to the upper die seat, the mounting seat and the blank holder, of the mounting seat and used for enabling screws to sequentially penetrate into the mounting seat in a detachable threaded fixed connection mode.

8. The self-discharging rivetless riveting die of claim 1, wherein: the taper of the male die is 5 degrees, the diameter of the small end is 8-10 mm, and the male die is made of high-quality carbon tool steel.

9. The self-discharging rivetless riveting die of claim 8, wherein: the female die is in clearance fit with the elastic seat ring, the female die is in clearance fit with the stripper plate, and the elastic seat ring is made of elastic rubber.