CN210497942U

CN210497942U - Self-pressurization stretching die

Info

Publication number: CN210497942U
Application number: CN201920836423.5U
Authority: CN
Inventors: 陈旭燎; 高航; 余仕杰
Original assignee: Fuzhou Huilong Machinery Mold Co ltd
Current assignee: Fuzhou Huilong Machinery Mold Co ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-05-12
Anticipated expiration: 2029-06-05

Abstract

The utility model provides a from tensile mould of pressure boost, including last mould, lower mould, blank holder, upper pressure jar and lower top cylinder, the lower mould with the blank holder is all located go up the below of mould, just the blank holder is located the outer lane of lower mould, the upper pressure jar is established the top of last mould is passed through go up the mould do the lower mould with the blank holder provides the packing force, the top cylinder does down the blank holder provides the jacking force, the upper pressure jar all connects in an oil press with lower top cylinder, still includes one from taking oil pressure system, from taking oil pressure system to include the small hydro-cylinder of plural number, it is a plurality of the small hydro-cylinder is fixed in on the blank holder, and the ejector pin top-down of small hydro-cylinder acts on the lower mould. The utility model discloses take one set of pressure system on the mould to supply to blank pressing power, thereby under the sufficient prerequisite of the pressure of jacking cylinder under satisfying, reduce the loading cylinder tonnage, the cost is reduced widely.

Description

Self-pressurization stretching die

Technical Field

The utility model relates to a stretching die.

Background

Fig. 1 is a schematic diagram showing a typical drawing die. The drawing and edge pressing device comprises an upper die 1 '(also called a male die), a lower die 2' (also called a female die), an edge pressing ring 3 ', an upper pressing cylinder 4' and a lower ejecting cylinder 5 ', wherein the upper pressing cylinder 4' and the lower ejecting cylinder 5 'both provide oil pressure by an oil press 6' to press a blank 200 to be drawn to move downwards so as to finish the drawing and edge pressing functions.

In the production process of the drawing die, the tonnage (the tonnage of an upper pressure cylinder of an oil press) actually required by the die is not very large, but the tonnage (namely the tonnage of a lower top cylinder of the oil press) of the blank holding force of the die is required to be very high. Generally, the tonnage of the upper cylinder of a standard oil press is much larger than that of the lower top cylinder (for example, the tonnage of the upper cylinder of an oil press of 800 tons can reach 800 tons, but the tonnage of the lower top cylinder can only reach 160 tons). Therefore, when a mold selector is designed, in order to meet the requirement of the mold edge pressing force (the tonnage of a lower top cylinder of an oil press), oil press equipment with larger tonnage has to be selected during model selection, so that production resources are wasted, and the part accounting cost of stamping production is closely related to the tonnage of the oil press. Large tonnage means large costs. On a small drawing die, the requirement on blank holder force is not high, and a spring or a nitrogen cylinder can be used for replacing the action of a lower top cylinder of an oil press. However, on a medium-large mould, the requirement on the blank holder force is higher, and at the moment, the tonnage of a spring or a nitrogen cylinder cannot meet the blank holder force of a large tonnage, and the lower jacking cylinder of the oil press can only be used for working. For example, the blank holder pressure needs 200 tons, and the mold needs to be placed on an oil press with a lower cylinder pressure of 200 tons, and the mold is designed such that an oil press with a lower cylinder pressure of 200 tons, that is, an oil press with a lower cylinder pressure of 1200 tons, is selected for the first time. But in practice the oil press tonnage required for the design may be only 500 tons. And there is no suitable solution currently available in the industry.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in providing a from tensile mould of pressure boost, takes one set of pressure system on the mould to supply one to blank holder effect, thereby under the sufficient prerequisite of pressure of top cylinder under satisfying, reduce the pressure of upper pressure jar tonnage.

The utility model discloses a realize like this: the utility model provides a from tensile mould of pressure boost, includes mould, lower mould, blank holder, upper pressure jar and lower top cylinder, the lower mould with the blank holder is all located go up the below of mould, just the blank holder is located the outer lane of lower mould, the upper pressure jar is established the top of last mould is passed through go up the mould do the lower mould with the blank holder provides the packing force, the top cylinder does down the blank holder provides the jacking force, the upper pressure jar all connects in an oil press with lower top cylinder, still includes one from taking oil pressure system, include a plurality of little hydro-cylinders, it is a plurality of from taking oil pressure system little hydro-cylinder is fixed in on the blank holder, and the ejector pin top-down of little hydro-cylinder acts on the lower mould.

According to the utility model discloses an embodiment, from taking oil hydraulic system still includes an at least shunt valve and an at least hydraulic pump, one the hydraulic pump is connected to a plurality ofly respectively through a shunt valve little hydro-cylinder.

According to the utility model discloses an embodiment, the side of blank holder is equipped with a plurality of side direction open-ended storage tanks, the bottom surface of storage tank is equipped with a fixed plate, is equipped with a through-hole on the fixed plate, the cylinder body of little hydro-cylinder is fixed on the fixed plate, just the ejector pin by the through-hole stretches to the lower mould.

According to the utility model discloses an embodiment, still be equipped with a backing plate between the top surface of storage tank and the cylinder body of little hydro-cylinder.

The utility model has the advantages that: the utility model discloses a take one set of pressure system certainly on the tensile mould of pressure boost, can follow the blank holder and exert pressure in the lower mould to supplement one to blank holder effect, thereby under the sufficient prerequisite of pressure that the top jar was pushed up under satisfying, reduce the loading cylinder tonnage, reduced the processing cost widely.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a pressurized drawing die in the prior art.

Fig. 2 is the structure schematic diagram of the pressurized stretching mold of the present invention.

Fig. 3 is the structure schematic diagram of the oil pressure system of the utility model.

Fig. 4 is the structure schematic diagram of the oil pressure system of the utility model after the blank holder is removed.

Detailed Description

Please refer to fig. 2 to 4, the utility model discloses a self-pressurizing drawing die 100, including last mould 1, lower mould 2, blank holder 3, upper pressure cylinder 4 and lower top cylinder 5, lower mould 2 with blank holder 3 all locates go up the below of mould 1, just blank holder 3 is located the outer lane of lower mould 2, upper pressure cylinder 4 is established go up the top of mould 1 and for it provides the packing force to go up the mould, lower top cylinder 5 is located the below of lower mould 2 and for lower mould 2 provides the top force, upper pressure cylinder 4 and lower top cylinder 5 all connect in an oil press 7 (not shown).

The utility model discloses a from tensile mould of pressure boost still includes one from taking oil hydraulic system 6, include a plurality of little hydro-cylinders 61, an at least shunt valve 62 and an at least hydraulic pump 63, a plurality of from taking oil hydraulic system 6 little hydro-cylinder 61 is fixed in on the blank holder 3, and the ejector pin 612 top-down of little hydro-cylinder 61 acts on lower mould 2. One of the hydraulic pumps 63 is connected to a plurality of the small cylinders 61 through a shunt valve 62 by oil pipes 64, respectively. One hydraulic pump 63 can supply oil to a plurality of small oil cylinders 6.

In the preferred embodiment of the present invention, the side of the blank holder 3 is provided with a plurality of laterally opened receiving grooves 32, the bottom surface of the receiving groove 32 is provided with a fixing plate 34, a through hole 36 is provided on the fixing plate 34, the cylinder body of the small cylinder 61 is fixed on the fixing plate 34, and the top rod 612 extends from the through hole 36 to the lower mold.

A backing plate 38 is arranged between the top surface of the containing groove 32 and the cylinder body 614 of the small oil cylinder 61, so that the stress area of the blank holder 3 can be increased.

The utility model discloses a theory of operation: when the mould works, the upper mould 1 is lifted by the upper pressure cylinder 4 to leave, the blank holder 3 is jacked up by the mandril 52 of the lower jacking cylinder 5, and the distributed small oil cylinders 61 are jacked out of the mandril by the oil supplied by the hydraulic pump 63. When the blank is to be drawn, the upper die 1 firstly contacts the blank holder 3 downwards to press the blank 200 to be drawn to move downwards, the lower top cylinder 5 is gradually stressed at the moment, the small oil cylinder 61 on the die is also stressed, and the drawing and blank holding effects are finished under the combined action of the two forces of the lower top cylinder 5 and the small oil cylinder 61.

The utility model discloses with small-size hydro-cylinder evenly distributed on the blank holder 3 of mould, the ejector pin 612 of little hydro-cylinder 61 is used in lower mould 2, can follow blank holder 3 and exert pressure in lower mould 2 to supplement the blank holder effect, thereby under the sufficient prerequisite of pressure that satisfies lower top cylinder 5, reduce the tonnage of upper pressure jar 4.

Taking a die originally requiring a 1200-ton hydraulic press as an example, the lower top cylinder 5 requires 200 tons, and the upper pressure cylinder 4 requires only 800 tons. Change to use the utility model discloses a behind the mould, only need 800 tons hydraulic press just can accomplish, that is to say only need reach the demand of upper pressure jar 4 can. When the die works, the lower top cylinder 5 plays a main role, the lower top cylinder 5 and the small oil cylinders 61 work together to finish the drawing and edge pressing functions, and as the lower top cylinder 5 of the oil press of 800 tons is 160 tons, if the common acting force of all the small oil cylinders 61 is 40 tons at this time, the sum of the edge pressing forces can reach 200 tons, so that the work which needs to be finished on 1200 tons can be finished on the press of 800 tons, and the tonnage of the upper pressure cylinder is greatly reduced.

The utility model has the advantages that: the utility model discloses a take one set of pressure system certainly on the tensile mould of pressure boost, can follow the blank holder and exert pressure in the lower mould to supplement one to blank holder effect, thereby under the sufficient prerequisite of pressure that the top jar was pushed up under satisfying, reduce the pressure of upper pressure jar tonnage.

Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a from tensile mould of pressure boost, includes mould, lower mould, blank holder, upper pressure jar and lower top cylinder, the lower mould with the blank holder is all located go up the below of mould, just the blank holder is located the outer lane of lower mould, the upper pressure jar is established the top of last mould is passed through go up the mould do the lower mould with the blank holder provides the packing force, the top cylinder does down the blank holder provides the jacking force, the upper pressure jar all connects in an oil press its characterized in that with the top cylinder down: still include one from taking oil pressure system, from taking oil pressure system including the little hydro-cylinder of plural number, it is plural little hydro-cylinder is fixed in on the blank holder, and the ejector pin top-down of little hydro-cylinder acts on the lower mould.

2. A self-pressurizing drawing die as recited in claim 1, wherein: the self-contained oil pressure system further comprises at least one shunt valve and at least one hydraulic pump, and the hydraulic pump is connected to the small oil cylinders through the shunt valve respectively.

3. A self-pressurizing drawing die as recited in claim 1, wherein: the side face of the blank holder is provided with a plurality of accommodating grooves with lateral openings, the bottom surface of each accommodating groove is provided with a fixing plate, each fixing plate is provided with a through hole, the cylinder body of the small oil cylinder is fixed on the fixing plate, and the ejector rod extends to the lower die from the through hole.

4. A self-pressurizing drawing die as recited in claim 3, wherein: and a base plate is also arranged between the top surface of the accommodating groove and the cylinder body of the small oil cylinder.