CN212329491U

CN212329491U - Material ejecting structure of drawing die

Info

Publication number: CN212329491U
Application number: CN202020476337.0U
Authority: CN
Inventors: 邓家锦; 金博; 钱璇
Original assignee: Xiamen Golden Dragon Auto Body Co Ltd
Current assignee: Xiamen Golden Dragon Auto Body Co Ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2021-01-12
Anticipated expiration: 2030-04-03

Abstract

The utility model discloses a liftout structure of drawing die is fixed in on drawing die's the upper die base, include: the ejection device comprises an ejection block, a base plate, a limiting block and an elastic piece, wherein a cavity matched with the shape of the ejection block is formed in an upper die base; the limiting block is fixed on the backing plate; the elastic parts are two and are symmetrically arranged on two sides of the limiting block, one end of each elastic part is fixedly connected with the backing plate, and the other end of each elastic part is abutted to the ejection block. The utility model discloses a draw die's liftout structure through setting up liftout piece and elastic component, not only can prevent that the sheet material from being adsorbed on the upper die base, avoids influencing product appearance moreover, can also prevent to corrugate at the speed of control sheet material when drawing the shaping simultaneously.

Description

Material ejecting structure of drawing die

Technical Field

The utility model relates to an automobile body mould technical field, more specifically the liftout structure that relates to a drawing die that says so.

Background

With the change of aesthetic concepts of people, people have higher and higher requirements on the appearance of the automobile body, and in addition, the trend of light weight of the automobile body, the thickness of a plate used by the automobile body is smaller and smaller, and the shape is more and more complex.

At present, in the actual production process of a vehicle body, a drawing die is required, and generally comprises an upper die holder (namely a female die), a blank holder, a male die and a lower die holder, wherein the blank holder is arranged between the upper die holder and the lower die holder and is a ring-shaped pressing device arranged at the edge part between the female die and the male die for preventing the edge part of a workpiece from buckling and wrinkling. The male die is fixed on the lower die seat. In order to avoid the situation that the female die adsorbs a workpiece due to large drop height of the molded surface of the product, small vertical angle and deep drawing depth, a material returning structure is usually required to be arranged on the upper die base.

However, in the traditional material returning structure, a compressed spring is used as a material returning force source and acts on the ejector pin, the ejector pin pushes the upper die base out, and the ejector pin is in point contact with the plate, so that the area of the plate can be stamped, and the appearance of a product can be affected.

Therefore, how to provide a liftout structure of a drawing die for avoiding the generation of imprinting is a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least.

Therefore, an object of the utility model is to provide an liftout structure of drawing die is fixed in on the upper die base of drawing die, include: the die comprises a material ejecting block, a base plate, a limiting block and an elastic piece, wherein a cavity matched with the material ejecting block in shape is formed in the upper die base, the material ejecting block is placed in the cavity, and the base plate is fixedly arranged at the top of the upper die base at a position corresponding to the cavity; the limiting block is fixed on one side, close to the ejector block, of the backing plate; the elastic pieces are two and symmetrically arranged on two sides of the limiting block, one end of each elastic piece is fixedly connected with the backing plate, and the other end of each elastic piece is abutted to the ejection block.

Preferably, the elastic member is a nitrogen spring.

Preferably, the nitrogen spring is mounted on the backing plate through M6 hexagon socket head cap fixing bolts.

Preferably, the limiting block is fixed on the backing plate through an M10 hexagon socket head cap screw.

Preferably, the width of the ejector block is greater than the lateral distance between the two elastic members.

Preferably, the limiting block is a cuboid, the height of the limiting block is smaller than that of the elastic piece in a natural state, and the hardness of the limiting block is HRC 40-45.

According to the technical scheme, compare with prior art, the utility model provides a drawing die's liftout structure through setting up liftout piece and nitrogen spring, not only can prevent that the sheet material from being adsorbed on the upper die base, avoids moreover producing the influence to product appearance, can also prevent to corrugate at the speed of control sheet material when drawing the shaping simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

The attached drawing of FIG. 1 is a schematic axial view of the drawing die structure provided by the present invention.

Fig. 2 is a top view of the drawing die provided by the present invention.

FIG. 3 is a cross-sectional view of a drawing die M-M according to the present invention.

Fig. 4 is an exploded view of the drawing die provided by the present invention.

Fig. 5 is a schematic structural diagram of an ejection structure of a drawing die provided by the present invention.

Wherein the reference numbers in the figures are:

1-an upper die holder, 2-a blank holder, 3-a lower die holder, 4-a male die,

10-a material ejecting block, 11-an elastic part, 12-a limiting block and 13-a backing plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The embodiment of the utility model discloses drawing die's liftout structure is fixed in on drawing die's upper die base 1, include: the device comprises a material ejecting block 10, a backing plate 13, a limiting block 12 and an elastic piece 11, wherein a cavity matched with the shape of the material ejecting block 10 is formed in an upper die base 1, the material ejecting block 10 is placed in the cavity, and the backing plate 13 is fixedly arranged at the top of the upper die base 1 corresponding to the cavity; the limiting block 12 is fixed on one side of the backing plate 13 close to the ejector block 10; the two elastic members 11 are symmetrically arranged on two sides of the limiting block 12, one end of each elastic member is fixed on the backing plate 13, and the other end of each elastic member abuts against the ejection block 10. Wherein, the elastic member 11 is a nitrogen spring. The nitrogen spring is mounted on the backing plate 13 by M6 socket head cap fixing bolts. The limiting block 12 is fixed on the backing plate 13 through an M10 hexagon socket head cap screw, the limiting block 12 is a cuboid, and the height of the limiting block 12 is smaller than that of the elastic part 11 in a natural state. The limiting block 12 needs to be quenched to reach the hardness of HRC40-45, and the service life of the limiting block 12 is prolonged. The upper die holder 1 and the ejector block 10 are in a sliding relationship, and a sliding guide surface between the upper die holder 1 and the ejector block needs quenching treatment, so that the service life is prolonged.

The installation sequence of the liftout structure of the drawing die disclosed in this embodiment is as follows: firstly, a nitrogen spring is arranged on the backing plate 13 through an M6 hexagon socket head cap screw; secondly, the limiting block 12 is arranged on the backing plate 13 through an M10 hexagon socket head cap screw; then, the ejector block 10 is assembled to the upper die holder 1, and finally, the tie plate 13 is mounted to the upper die holder 1 by M10 hexagon socket head cap screw.

Referring to fig. 1-4, when the drawing die works, a machine tool air ejector rod pushes a blank holder 2 to a certain height, the height is the blank holder stroke, a plate to be processed is placed on the blank holder 2, after the plate is placed stably, an upper die base 1 and a material pushing block 10 move downwards along with an upper sliding block of the machine tool, after the upper die base 1 is contacted with the blank holder 2, the blank holder 2 continues to move downwards, so that a nitrogen spring starts to be compressed, the reaction force of the nitrogen spring acts on the material pushing block 10, and the plate is pressed on a male die 4; until the material pushing block 10 contacts with the limiting block 12, and simultaneously, the blank holder 2 and the lower die holder 3 are drawn completely.

In the process, the ejector block 10 is in contact with the plate and the male die 4 before drawing is started, so that the part of the plate of the ejector block 10 is quickly pressed on the male die 4 due to the pressure of the nitrogen spring after drawing is started, and other areas are just formed, so that material flowing in the area is reduced, and the problem of wrinkling of some areas due to excessive materials is avoided. In the descending process of the upper die holder 1, the material pushing block 10 presses the plate material by the force transmitted by the nitrogen spring, so that the plate material is prevented from wrinkling in the forming process, and the product quality is ensured.

After the drawing is completed, the upper die holder 1 and the lower die holder 3 start to separate: the upper die base 1 starts to move upwards along with the upper sliding block, the nitrogen spring gradually extends at the moment, the upper die base 1 is separated from the plate, the nitrogen spring resets after the upper die base 1 rises to the ejection block stroke, the ejection block 10 is separated from the plate, the blank holder 2 stops moving upwards after the blank holder 2 rises to the blank holder stroke under the action of the machine tool ejector rod until the upper sliding block resets, and one punching time is completed. The material ejecting block 10 pushes the plate out of the cavity by the force transmitted by the nitrogen spring in the ascending process of the upper die base 1, so that the plate is prevented from being taken away, and a good material ejecting effect is realized.

In the process, the process that the upper die base 1 is separated from the plate material to the material ejecting block 10 is separated from the blank material, the material ejecting block 10 is always in a material pressing state, the downward force is given to the plate material, and the force ensures that the plate material cannot be taken away in the upward movement of the upper die base 1.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. The utility model provides a liftout structure of drawing die, is fixed in on the upper die base (1) of drawing die, its characterized in that includes: the die comprises a material ejecting block (10), a backing plate (13), a limiting block (12) and an elastic piece (11), wherein a cavity matched with the material ejecting block (10) in shape is formed in the upper die base (1), the material ejecting block (10) is placed in the cavity, and the backing plate (13) is fixedly installed at the top of the upper die base (1) corresponding to the cavity; the limiting block (12) is fixed on one side, close to the ejector block (10), of the backing plate (13); the number of the elastic pieces (11) is two, the elastic pieces are symmetrically arranged on two sides of the limiting block (12), one end of each elastic piece is fixedly connected with the backing plate (13), and the other end of each elastic piece is abutted against the ejector block (10).

2. The drawing die topping structure according to claim 1, wherein the elastic member (11) is a nitrogen spring.

3. The drawing die topping structure according to claim 2, wherein the nitrogen spring is mounted on the tie plate (13) by M6 hexagon socket head cap fixing bolts.

4. The drawing die topping structure according to claim 3, wherein the stopper (12) is fixed on the tie plate (13) by means of an M10 socket head cap screw.

5. Drawing die plug structure according to claim 4, characterised in that the width of the plug block (10) is greater than the transverse distance of the two elastic elements (11).

6. The drawing die ejector structure according to claim 5, wherein the limiting block (12) is a cuboid, the height of the limiting block (12) is smaller than the height of the elastic part (11) in a natural state, and the hardness of the limiting block (12) is HRC 40-45.