CN202861135U

CN202861135U - Convex hull stamping die structure

Info

Publication number: CN202861135U
Application number: CN 201220455435
Authority: CN
Inventors: 何书铨
Original assignee: SPI PRECISION SUZHOU CO Ltd
Current assignee: SPI PRECISION SUZHOU CO Ltd
Priority date: 2012-09-07
Filing date: 2012-09-07
Publication date: 2013-04-10
Anticipated expiration: 2022-09-07

Abstract

The utility model provides a convex hull stamping die structure. The convex hull stamping die structure comprises a punch and a concave die which is arranged under the punch. The center of the concave die is concaved downward to form a hollow cavity. The convex hull stamping die structure is characterized in that an ejector rod is arranged inside the cavity, and the gap between the ejector rod and the punch is a convex hull molding space. When the convex hull is molded, the convex hull stamping die structure utilizes a bulging craft, capable of achieving finishing a plurality of convex hulls at one stamping in a continuous stamping die which is capable of conducting multi-station continuous material feeding,and is free from reshaping craft, and the measurement result of each convex hull completely meets the production accuracy requirement.

Description

A kind of convex closure punching die structure

Technical field

The utility model relates to a kind of diel, particularly relates to a kind of convex closure punching die structure.

Background technology

General common convex closure forming method is to use the direct punching press on the product sheet stock of a profiling drift to hit moulding.As shown in Figure 1, directly opening one in convex closure moulding one side and allow bit architecture, is very much simple.Few and size, convex closure structure that shape need is not high for quantity, this is very suitable way.But adopt the straight forming method.Stamp out the product that comes under this technique and exist very large error at the convex closure height, when product surface has a large amount of convex closure structures, for example for the welded plate product of rechargeable battery in the Rechargeable vehicle, the uniformly Laser Welding contact that distributing on this product, quantity differs.The pad that 128 projections are arranged in the scope of 250mm*135mm in the time of at most.Owing to be automatic laser welding usefulness, so the quality requirement of butt welding contact is very high, require the tolerance of all pads to be: diameter dimension precision+0.03/-0.03mm, height dimension precision+0.03/-0.03mm, per 4 solder joints are 1 group.For this type of whole height for convex closure, product that the Laser Welding precision prescribed is high, the stability when common punch forming process obviously can't guarantee to produce, the convex closure mould can't satisfy the convex closure height-precision and be the requirement of+0.03/-0.03mm.

The utility model content

The utility model is finished in order to solve deficiency of the prior art, when providing a kind of moulding convex closure, the purpose of this utility model adopts " bulging " technique, can be implemented in the continuous stamping die of multistation friction feeding a punching press and finish a plurality of convex closures, need not carry out shaping process, and the measurement result of each convex closure satisfies the convex closure punching die structure that Product Precision requires fully.

The technical solution of the utility model is:

A kind of convex closure punching die structure, comprise drift and the die that is positioned at described drift below, the die cavity of the center of described die formation hollow recessed down is characterized in that: be provided with push rod in the described die cavity, the gap between described push rod and the described drift is the convex closure molding space; The outer peripheral edges of described push rod closely contact with the perisporium of described die cavity; Described push rod and described die are threaded fixing by the outer peripheral edges of described push rod with the threaded engagement of the perisporium of described die cavity.

Further, the technical solution of the utility model can also be:

The bottom surface of described drift is flat condition.

The external diameter of described drift is slightly less than the sectional dimension of described die cavity.

The utility model is by the said structure of mould, utilize the technique of " bulging ", namely be in the process of moulding, material is squeezed into the die cavity of the very little die in gap by forming punching head, the material of getting into is tightly encased by concave die cavity, and below convex closure, there is fixed mandril to prop up, this moment, material can not freely flow downward, along with the material that edges in is more and more, until a punching stroke finishes, the material that participates in like this action just looks like that press back is the same, is compressed in the die that is comprised of drift, die and push rod, manufactures convex closure one by one.Because the extruding bulging has been broken stress between the intrinsic material, so the convex closure distortion is quite little, be suitable for the punch forming surface a large amount of convex closure structures are arranged, for the whole height of convex closure, the product that the Laser Welding precision prescribed is high, the stability when guaranteeing to produce.

Description of drawings

Fig. 1 is the convex closure punching die structure schematic diagram of prior art.

Fig. 2 is the schematic diagram of convex closure punching die structure of the present utility model.

The figure number explanation

1, drift 2, die 3, die cavity 4, push rod 5, convex closure 6, nickel material

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

Of the present utility model a kind of convex closure punching die structure as shown in Figure 2, comprise drift 1 and the die 3 that is positioned at drift 1 below, the die cavity 3 of the center of die formation hollow recessed down is provided with push rod 4 in the die cavity, the gap between push rod 4 and the drift 2 is convex closure 5 molding spaces.

The outer peripheral edges of push rod of the present utility model and the perisporium of die cavity can be close contacts, and push rod of the present utility model and die are threaded fixing by the outer peripheral edges of push rod with the threaded engagement of the perisporium of die cavity.

The external diameter of drift of the present utility model is slightly less than the sectional dimension of die cavity.

The utility model is by above-mentioned structural design, utilize the technique of " bulging ", namely be in the process of moulding, material is squeezed into the die cavity of the very little die in gap by forming punching head, the material of getting into is tightly encased by concave die cavity, and below convex closure, there is fixed mandril to prop up, this moment, material can not freely flow downward, along with the material that edges in is more and more, until a punching stroke finishes, the material that participates in like this action just looks like that press back is the same, is compressed in the die that is comprised of drift, die and push rod, manufactures convex closure one by one.Because the extruding bulging has been broken stress between the intrinsic material, so the convex closure distortion is quite little, be suitable for the punch forming surface a large amount of convex closure structures are arranged, for the whole height of convex closure, the product that the Laser Welding precision prescribed is high, the stability when guaranteeing to produce.

Cause the convex closure free height different and push rod is arranged but owing to the different situations that cause final convex closure height also to be not quite similar of strain although there is not push rod to support during in view of moulding, the utility model also further improves, make the end face that enters described die of drift plane, like this top R angle very I in the convex closure forming process, enter flowing of material production in the molding space with effective prevention, and because the distortion of flowing and producing, resilience etc., thereby force moulding guarantee that the convex closure feature meets the requirements material, namely the height of each convex closure and diameter are controlled in the margin of tolerance.

The position of push rod in die cavity directly determines the height of convex closure.

Adopt technology of the present utility model, the precision of the diameter dimension of convex closure can reach+the 0.03/-0.03 millimeter; The height dimension precision can reach+the 0.03/-0.03 millimeter.The material that forms convex closure can be the nickel material of 0.3 millimeters thick.

Above-mentionedly only several specific embodiments in the utility model are illustrated; but can not be as protection domain of the present utility model; every equivalence of having done according to the design spirit in the utility model changes or modifies, and all should think to fall into protection domain of the present utility model.

Claims

1. convex closure punching die structure, comprise drift and the die that is positioned at described drift below, the die cavity of the center of described die formation hollow recessed down is characterized in that: be provided with push rod in the described die cavity, the gap between described push rod and the described drift is the convex closure molding space; The outer peripheral edges of described push rod closely contact with the perisporium of described die cavity; Described push rod and described die are threaded fixing by the outer peripheral edges of described push rod with the threaded engagement of the perisporium of described die cavity.

2. convex closure punching die structure according to claim 1, it is characterized in that: the bottom surface of described drift is flat condition.

3. convex closure punching die structure according to claim 2, it is characterized in that: the external diameter of described drift is slightly less than the sectional dimension of described die cavity.