WO2020238460A1

WO2020238460A1 - Demolding mechanism for drawing die for metal hollow body

Info

Publication number: WO2020238460A1
Application number: PCT/CN2020/085120
Authority: WO
Inventors: 安旭; 顾海驹; 汪洋
Original assignee: 苏州斯莱克精密设备股份有限公司
Priority date: 2019-05-28
Filing date: 2020-04-16
Publication date: 2020-12-03
Also published as: CN110216213A

Abstract

Disclosed in the present application is a demolding mechanism for a drawing die for a metal hollow body. A seat body is provided internally with an elastic ring and a mechanism which transfers an axial stress to a radial displacement; a yielding hole is provided in the elastic ring, and the yielding hole is in dynamic friction fit with a punch; and a passing channel for the punch is formed in the middle of the mechanism which transfers an axial stress to a radial displacement, such that when the punch moves downwards in an axial direction, the passing channel expands in a radial direction, and when the punch moves upwards in the axial direction, the passing channel contracts in the radial direction. The present application is ingenious in structural design. Abrasion to the demolding mechanism in a demolding process is greatly reduced, and in addition, a sufficient demolding force can be guaranteed, while the surface of a product will not be scratched. Therefore, the present application has a prominent substantive effect and represents notable progress.

Description

Drawing mold demoulding mechanism of metal hollow body

Technical field

The application relates to the field of processing equipment for metal hollow bodies, and in particular to a drawing mold demolding mechanism for metal hollow bodies.

Background technique

The metal hollow body is a metal cylindrical body with an open end, such as power battery shells and metal cans. Take a metal can as an example. When the can body is stretched and formed, the cylindrical product will be wrapped on the punch after being stretched. At this time, a demolding mechanism is required to separate the product from the punch (hereinafter referred to as "demolition"). Tank"), and most of them use the post-discharge method to remove the tank.

In the prior art, there are generally two ways to release the tank after discharging: one adopts the apron demoulding mechanism, but because the apron is easy to wear, it can only be used for stretching and molding with a small wrapping force;

Another type of steel claws uses a swinging method to force the scraping and demoulding, but the steel claws will touch the surface of the product during the molding process, which is easy to scratch the surface of the product, and it is easy to cause the product to flange at the scraping place, which may damage the bottom Mechanism for one-step demolding process.

Therefore, it is very necessary to design a new demolding mechanism to solve the above-mentioned problems and ensure that there is sufficient demolding force without scratching the surface of the product.

Summary of the invention

The purpose of this application is to provide a drawing mold demolding mechanism for metal hollow bodies.

In order to achieve the above purpose, the technical solution adopted in this application is:

A drawing mold demolding mechanism of a metal hollow body; comprising a seat body, an elastic ring and a mechanism for turning radial displacement under axial force;

The elastic ring is arranged in the middle of the seat body, and a relief hole is formed in the elastic ring along the up and down direction, and the relief hole is arranged coaxially with a molded hole and is frictionally matched with the punch;

The axial force-to-radial displacement mechanism is positioned in the seat body, and a through passage for the punch is formed in the middle, so that when the punch moves downward in the axial direction, the through passage expands in the radial direction. Open, when the punch moves upward in the axial direction, the passageway shrinks in the radial direction.

The relevant content in the above technical solution is explained as follows:

1. In the above solution, the axial force-to-radial displacement mechanism includes an oblique slider, an axial matching block and an elastic member;

There are at least two oblique sliders, and a passage for the punch is formed between each oblique slider, and each oblique slider is horizontally arranged in the seat around the outer periphery of the punch; When the head is moved up and demolded, the outer peripheral surface of the punch is fitted, and the outer side of each inclined slider is arranged in an inclined plane, and the upper end of the inclined surface faces inward and the lower end faces outward;

The axial matching block is positioned on the outer side of the inclined sliding block and is abutting and fitting with the inclined sliding block in the horizontal direction; the inner side of the axial matching block corresponds to the outer side surface of the inclined sliding block to fit it The oblique abutment surface of the oblique abutment surface has an upper end facing outward and a lower end facing inward.

2. In the above solution, each of the inclined sliders is positioned against the lower surface of the elastic ring with its upper surface abutting. The elastic ring may be an apron or other elastic structures with the same or similar functions.

3. In the above solution, the axial matching block is fixed or formed in the seat body.

4. In the above solution, the axial matching block is assembled in the seat body, and the outer side surface of the axial matching block is positioned against the seat body in the horizontal direction; the upper surface and the lower surface of the axial matching block are opposite Seat positioning.

5. In the above solution, it further comprises a rubber pad, which is elastically supported between the upper surface of the axial matching block and the seat body in the vertical direction; the lower surface of the axial matching block is positioned against The upper surface of the bottom plate of the seat body.

6. In the above solution, the lower section of the outer side surface of the inclined slider is provided with a first step protruding outwards, and a second step is correspondingly provided on the axial matching block, and the second step is located on the side of the first step. Above, and the two snap fit in the up and down direction.

7. In the above solution, the inner side surface of the inclined slider is provided with a relief groove on the lower section of the inner side surface, and the groove depth of the relief groove is greater than or equal to the thickness of the product after stamping.

8. In the above solution, the upper surface of the inclined sliding block is positioned and matched with the seat body, and the lower surface is elastically positioned in the up-down direction with the upper surface of the seat body bottom plate through an elastic member.

9. In the above solution, the elastic member is a return spring, the upper end of the return spring is elastically supported on the lower end of the inclined slider, and the lower end of the return spring is supported and positioned relative to the base plate of the seat body.

The working principle and advantages of this application are as follows:

The present application is a drawing mold demolding mechanism for a hollow metal body; an elastic ring and an axial force-reversed radial displacement mechanism are arranged in the seat body; a relief hole is opened in the elastic ring, and the relief hole friction with the punch Cooperate; the middle of the axial force and the radial displacement mechanism is formed with a punch passage, which forms when the punch moves downward in the axial direction, the passage opens in the radial direction, and when the punch moves upward in the axial direction, the passage passage Shrink in the radial direction.

Compared with the prior art, this application adopts the design of the radial displacement mechanism by the axial force, such as the inclined surface of the inclined sliding block and the axial matching block, which will transform the axial compression of the punch on the inclined sliding block into With the radial movement of the inclined slider, the inclined slider can open and close in the radial direction. That is, when the punch takes the product down, the inclined slider will separate and give way, and when the punch carries the product to demold, the inclined slider will close to demold the product. With this design, on the one hand, the wear of the demolding mechanism during demolding is greatly reduced, and on the other hand, it can ensure a sufficient demolding force without scratching the surface of the product, so it has a prominent substantive effect And significant progress.

In addition, through the setting of an elastic ring, such as a rubber ring, the rubber ring can be used to press the inclined slider in advance to make it out, and pre-gap the punch with the product, so that the surface of the product will not be affected by the inclined slider. Scratches; on the one hand, the inclined slider can be made of hard materials, which will be more durable than traditional rubber ring release, which solves the contradiction between "hard and durable" and "easy to scratch products"; on the other hand Even conventional sliders (such as swing steel claws) can reduce the scratches on the product due to the pre-gap generated by the rubber ring.

Description of the drawings

Figure 1 is a schematic cross-sectional structure diagram of an embodiment of the application;

Figure 2 is a perspective view of an embodiment of the application in a cut-away state;

Figure 3 is an exploded exploded view of an embodiment of the application in a cut-away state;

Figure 4 is an enlarged view of A in Figure 1;

5 is a schematic diagram of a cross-sectional structure of an oblique slider according to an embodiment of the application;

6 is a schematic cross-sectional structure diagram of an axial matching block according to an embodiment of the application.

In the above drawings: 1. Seat body; 2. Forming ring; 3. Rubber ring; 4. Oblique slider; 5. Axial matching block; 6. Elastic part; 7. Forming hole; 8. Punch; 9. Product; 10. Give way hole; 11. Pass through; 12. Inclined surface; 13. Oblique abutment surface; 14. Rubber pad; 15. First step; 16. Second step; 17. Give way groove.

Detailed ways

The application will be further described below with reference to the drawings and embodiments:

Example: The following will clearly illustrate the case with drawings and detailed descriptions. Anyone skilled in the art, after understanding the embodiments of the case, can change and modify the technology taught in the case without departing from the spirit of the case With scope.

The terms used herein are only to describe specific embodiments, and are not intended to limit the present case. Singular forms such as "a", "this", "this", "本" and "this", as used herein, also include plural forms.

Regarding the “first”, “second”, etc. used in this text, they do not specifically refer to the order or sequence, nor are they used to limit the present case. They are only used to distinguish components or operations described in the same technical terms.

Regarding the "connection" or "positioning" used in this text, it can mean that two or more components or devices are in direct physical contact with each other or indirectly in physical contact with each other, or two or more components or devices are in mutual operation Or action.

Regarding the "including", "including", "having", etc. used herein, all are open terms, which means including but not limited to.

Regarding the terms used in this article, unless otherwise specified, each term usually has the usual meaning when used in this field, in the content of this case, and in the special content. Certain terms used to describe the case will be discussed below or elsewhere in this specification to provide those skilled in the art with additional guidance on the description of the case.

Regarding the "up", "down", "front", "rear", "left", "right", etc. used in this article, they are all directional terms. In this case, they only illustrate the positional relationship between the structures , Not to limit the specific direction of the actual implementation of this case.

Refer to Figures 1 to 3, a drawing mold demolding mechanism for a hollow metal body; including a seat body 1, the seat body 1 is provided with an axial force to a radial displacement mechanism, the seat body 1 The forming ring 2 and the elastic ring can also be directly or indirectly provided.

Wherein, the elastic ring can be an apron 3, or other elastic structures with the same or similar functions. The axially forced-to-radial displacement mechanism includes an inclined slider 4, an axial matching block 5 and an elastic member 6.

The forming ring 2 is provided at the upper end of the seat body 1, and a forming hole 7 is opened in the forming ring 2 along the up and down direction. The forming hole 7 is used for forming the product 9 when the punch 8 is inserted downward; The upper section has a taper, the diameter of the orifice forming the forming hole 7 is larger than the diameter of the cone bottom, and the diameter of the cone bottom corresponds to the diameter of the punch 8, which constitutes when the punch 8 moves down with the product 9 , The product 9 is squeezed and wrapped around the lower end of the punch 8 through the action of the forming hole 7 and the punch 8, and the punch 8 is guided by the taper of the forming hole 7 when making a downward stroke. The specific structure of the forming ring 2 and the stretching forming principle of the punch 8 are based on the prior art, and those skilled in the art can master and flexibly use it, so it will not be repeated.

The apron 3 is movably positioned in the middle of the seat body 1 in the up and down direction, and a relief hole 10 is defined in the apron ring 3 along the up and down direction, and the relief hole 10 is arranged coaxially with the molding hole 7. And it is in dynamic friction fit with the punch 8. The upper end of the relief hole 10 can also be provided with a taper to guide the punch 8. The relief hole 10 does not have to be a round hole, but must have at least two symmetry with the punch 8 in the horizontal direction The contact points are distributed, and the horizontal distance from each contact point to the axis of the punch 8 is equal to form a dynamic friction fit.

Through the setting of the apron 3, the apron 3 can be used to press the inclined slider 4 in advance to make it out to make way, and the punch 8 wrapped with the product 9 is pre-gaped, so that the surface of the product 9 will not be slanted by the slider 4 Scratches: The inclined slider 4 uses hard materials to make it more durable than the traditional rubber ring release, which solves the contradiction between "hard and durable" and "easy to scratch products".

There are at least two inclined sliding blocks 4, and each inclined sliding block 4 is positioned on the lower surface of the rubber ring 3 with its upper surface abutting, and a passage 11 for the punch 8 is formed between the inclined sliding blocks 4 , Each inclined slider 4 is horizontally and evenly arranged in the seat body 1 around the outer circumference of the punch 8; the inner surface of each inclined slider 4 fits the product 9 on the punch 8 when the punch 8 moves down On the surface, the outer peripheral surface of the punch 8 is attached when moving up and demolding. The outer side surface of each inclined slider 4 is arranged in an inclined plane shape, and the upper end of the inclined surface 12 faces inward and the lower end faces outward, forming the upper surface of the inclined slider 4 The width is smaller than the width of the lower surface; when the punch 8 does not extend into the demolding mechanism, the horizontal distance from the innermost end of the inner side surface of each inclined slider 4 to the axis of the punch 8 is equal to or less than the cross-sectional radius of the punch 8.

The upper surface of the inclined slider 4 is positioned and matched with the seat body 1 through the rubber ring 3, and the lower surface is elastically positioned in the up and down direction through the elastic member 6 and the upper surface of the bottom plate of the seat body 1.

The axial matching block 5 is positioned on the outer side of the inclined sliding block 4, and is abutting and fitting with the inclined sliding block 4 in the horizontal direction; as shown in Figures 5 and 6, the inner surface of the axial matching block 5 corresponds to The outer side of the inclined sliding block 4 is provided with an oblique abutment surface 13 attached to it. The upper end of the oblique abutment surface 13 faces outward and the lower end faces inward. The width of the upper surface of the axial matching block 5 is larger than the lower surface. The width.

Through the inclined surface matching design of the inclined sliding block 4 and the axial matching block 5, the axial pressing of the punch 8 on the inclined sliding block 4 is transformed into the radial movement of the inclined sliding block 4, so that the inclined sliding block 4 It can open and close in the radial direction. That is, when the punch 8 carries the product 9 down, the inclined slider 4 will separate and give way, and when the punch 8 carries the product 9 to demold, the inclined slider 4 will close to demold the product 9.

The number of the axial matching blocks 5 and the inclined sliding blocks 4 can be the same, and the two can be arranged in one-to-one correspondence, or the axial matching blocks 5 can also be directly made into an annular part, which is integrally sleeved on each inclined block The outer peripheral portion of the slider 4.

The axial matching block 5 is assembled in the seat body 1, the outer side surface of the axial matching block 5 is positioned against the seat body 1 in the horizontal direction, and the upper and lower surfaces of the axial matching block 5 are seated opposite to each other. Body 1 positioning. Alternatively, the axial matching block 5 may be directly fixed or formed in the seat body 1.

It also includes a rubber pad 14 that is elastically supported between the upper surface of the axial matching block 5 and the seat body 1 in the vertical direction; the lower surface of the axial matching block 5 is positioned against the The upper surface of the bottom plate of the seat body 1.

The matching of the axial matching block 5 and the rubber pad 14 can make the mouth of the product 9 evenly stressed during demolding, which not only facilitates demolding, but also the mouth of the product 9 is not easily deformed due to uneven force. Because after being stretched without flange, the mouth of the product 9 will not be very flat, there will be ups and downs. Such fluctuations will seriously affect demolding during demolding. With the axial mating block 5 and the rubber pad 14, each inclined slider 5 can be expanded and contracted in the vertical direction by the rubber pad 14 and then moved up and down with the height of the 9 mouth of the product, so that the 9 mouth of the product is demolded. The lower part of the part can also be subjected to demolding force, so that the product 9 is not easily demolded or even deformed due to unilateral force during demolding.

Wherein, as shown in Figures 5 and 6, the lower section of the outer side surface of the inclined slider 4 is provided with a first step 15 protruding outward, and a second step 16 is correspondingly provided on the axial matching block 5. The second step 16 is located above the first step 15 and the two are snap-fitted in the up and down direction. During the demolding process, when the inclined sliding block 4 moves upward, it will abut the second step 16 through the first step 15 so as to drive the axial matching block 5 to move upward together and press the rubber pad 14 upward.

Wherein, as shown in FIG. 4, the inner side surface of the inclined slider 4 is provided with a relief groove 17 in the lower section of the inner surface. The depth of the relief groove 17 in the radial direction is greater than or equal to the thickness of the stamped product 9 . The relief groove 17 plays the role of protecting the mouth of the product 9 during demolding. When demolding, the product 9 extends into the relief groove 17 and contacts the inclined slider 4, and faces the product downward through the upper end of the relief groove 17 9 demoulding, which can also prevent the 9 mouth of the product from deforming, and avoid the 9 mouth of the product being directly hit by the lower inner edge of the inclined slider 4 during demolding, causing flanging or bulging, which affects the subsequent re-stretching process and product 9 size .

The elastic member 6 is a return spring, the upper end of the return spring is elastically supported on the lower end of the inclined slider 4, and the lower end of the return spring is supported and positioned relative to the bottom plate of the seat body 1. In addition, the elastic member 6 may also be other components with the same or similar functions, such as elastic gaskets and reeds.

The working principle of this application is explained as follows:

First of all, the raw material of the can body before forming is pushed by the punch, and through the interaction of the punch 8 and the forming ring 2, it becomes an open end flangeless straight arm piece (hereinafter referred to as "product");

Then the stroke of the punch 8 continues, and the punch 8 pushes the product 9 to the apron 3. Due to the small aperture of the apron 3, impact and friction are generated between the product 9 and the apron 3, which makes the apron 3 bear Axial pressure

Then the stroke of the punch 8 continues, and the pressure received by the rubber ring 3 is transmitted to the lower inclined sliding block 4, because the inclined sliding block 4 and the outer axial matching block 5 achieve a dovetail structure relationship through the inclined surface, and the sliding track is an inclined surface. Therefore, the inclined sliding block 4 can only slide along the inclined surface after being subjected to force, and the more it slides, the more it runs to the periphery, which makes the diameter of the middle passage 11 increase; the elastic member 6 (return spring) under the inclined sliding block 4 has moderate elasticity, which can help The inclined slider 4 is reset before demolding;

When the product 9 continues down to reach the inclined slider 4, because the inclined slider 4 has been retreated in advance under the force of the rubber ring 3, the product 9 can pass the inclined slider 4 smoothly without being hit by the product 9 The inclined slider 4 causes scratches on the surface of the product 9;

Then the stroke of the punch 8 continues, the punch 8 takes the product 9 down to the end, so that the product 9 does not touch the inclined slider 4 at all; then the punch 8 starts to retreat with the product 9 due to the gap between the rubber ring 3 and the punch 8. The friction force is reversed, the rubber ring 3 will move upward and away from the inclined slider 4, and no longer press the inclined slider 4, at this time the inclined slider 4 can retract inward under the elastic force of the return spring;

Then the stroke of the punch 8 continues to retreat, and the opening of the product 9 will contact the inclined slider 4 that has been reset. Under the action of the inclined slider 4, the product 9 will be separated from the punch 8, thus completing the product 9 After demolding, the next product 9 can be stamped, stretched and demolded; here, the inclined slider 4 and the axial matching block 5 are snap-fitted through the first and

second steps

15, 16, and the two will follow the product The height of the 9 mouth part fluctuates synchronously, resulting in a small displacement in the axial direction, and the rubber pad 14 above the axial matching block 5 ensures that the high and low parts of the 9 mouth part of the product can receive the demolding force .

It should be noted that the aprons and forming rings in this article are not necessarily circular ring structures, but can also have other shapes; the apron holes of the aprons and the forming holes of the forming ring are not only circular, but also It can be a rectangle with rounded corners, etc. It is determined by the shape of the product interface to be processed, and the shape of the product is not limited to a cylindrical shape.

The above-mentioned embodiments are only to illustrate the technical ideas and features of the application, and their purpose is to enable those familiar with the technology to understand the content of the application and implement them accordingly, and cannot limit the protection scope of the application. All equivalent changes or modifications made according to the spirit and essence of this application shall be covered by the protection scope of this application.

Claims

A drawing mold demoulding mechanism for metal hollow bodies; it is characterized in that:

Including the seat body, but also including the elastic ring and the axial force to the radial displacement mechanism;

The elastic ring is arranged in the middle of the seat body, and a relief hole is formed in the elastic ring along the up and down direction, and the relief hole is arranged coaxially with a molded hole and is frictionally matched with the punch;

The axial force-to-radial displacement mechanism is positioned in the seat body, and a through passage for the punch is formed in the middle, so that when the punch moves downward in the axial direction, the through passage expands in the radial direction. Open, when the punch moves upward in the axial direction, the passageway shrinks in the radial direction.
The demolding mechanism according to claim 1, characterized in that: the axially forced-to-radial displacement mechanism comprises an inclined slider, an axial matching block and an elastic member;

There are at least two oblique sliders, and a passage for the punch is formed between each oblique slider, and each oblique slider is horizontally arranged in the seat around the outer periphery of the punch; When the head is moved up and demolded, the outer peripheral surface of the punch is fitted, and the outer side of each inclined slider is arranged in an inclined plane, and the upper end of the inclined surface faces inward and the lower end faces outward;

The axial matching block is positioned on the outer side of the inclined sliding block and is abutting and fitting with the inclined sliding block in the horizontal direction; the inner side of the axial matching block corresponds to the outer side surface of the inclined sliding block to fit it The oblique abutment surface of the oblique abutment surface has an upper end facing outward and a lower end facing inward.
The demolding mechanism according to claim 2, wherein the axial matching block is fixed or formed in the seat body.
The demolding mechanism according to claim 2, wherein the axial matching block is assembled in the seat body, and the outer side surface of the axial matching block is positioned against the seat body in the horizontal direction; The upper surface and the lower surface of the matching block are positioned relative to the base body.
The demolding mechanism according to claim 4, further comprising a rubber pad, which is elastically supported between the upper surface of the axial matching block and the seat body in the vertical direction; The lower surface of the matching block is positioned against the upper surface of the bottom plate of the seat body.
The demolding mechanism according to claim 5, wherein the lower section of the outer side surface of the inclined slider is provided with a first step protruding outward, and a second step is correspondingly provided on the axial matching block, The second step is located above the first step, and the two are snap-fitted in the up and down direction.
The demolding mechanism according to claim 2, characterized in that: the inner side surface of the inclined sliding block is provided with a relief groove in the lower section of the inner side surface, and the groove depth of the relief groove is greater than or equal to the thickness of the stamped product .
The demolding mechanism according to claim 1, wherein the elastic ring is an apron.
The demolding mechanism according to claim 2, wherein the upper surface of the inclined sliding block is positioned and matched with the seat body, and the lower surface is elastically positioned in the up-down direction with the upper surface of the seat body bottom plate through an elastic member .
The demolding mechanism according to claim 9, wherein the elastic member is a return spring, the upper end of the return spring is elastically supported on the lower end of the inclined slider, and the lower end of the return spring is supported relative to the base plate of the seat body Positioning.