CN2673534Y

CN2673534Y - Stepping punching mould

Info

Publication number: CN2673534Y
Application number: CN 200320132178
Authority: CN
Inventors: 唐启洪; 谢又炎; 曾桂德
Original assignee: Xiamen Hongfa Electroacoustic Co Ltd
Current assignee: Xiamen Hongfa Electroacoustic Co Ltd
Priority date: 2003-12-31
Filing date: 2003-12-31
Publication date: 2005-01-26
Anticipated expiration: 2013-12-31

Abstract

The utility model relates to a stepping punching mould used for producing metal part. The utility model is provided with upper and lower die holders, upper and lower guide sleeves, upper and lower shim plates, a concave form panel, a retaining ring, an inward guide post, a stripper, a limiting plate, a stripper spring, a fixing plate, a stripper bolt, a correcting nail and a male mould. The male mould is provided with a rib cutting male mould and a pre-cutting male mould. The blanking art work of the part is split into rib cutting and pre-cutting and fine cutting. The rib cutting male mould dashes out with a rib cutting slot on the corresponding strip. Subsequently, the pre-cutting male mould cuts off the rib cutting slot and approximately cuts out the end face of the part, and the fine cutting male mould cuts off the fine cutting allowance on the relevant position and finely cuts out the appearance of the part. As the rib cutting male mould is sharp and the deepness of the rib cutting is shallow, not only the material surface is cut off, but also the drawing on the material surface is smaller than the normal blanking. As the material is extruded when in forming, the procreant collapse angel is very small and not easy to be broken up. The collapse angel can not increased when the precutting procedure on the part. In the fine cutting procedure, the rib cutting is cut off and the pre-cutting splintery fracture can reach the size of the part.

Description

A kind of progressive stamping mould

Technical field

The utility model relates to a kind of diel, the especially improved progressive stamping mould that is used to produce metal parts.

Background technology

The progressive stamping mould is meant and is provided with the elasticity stripper, the band material has correcting to follow closely pinpoint mould, referring to Fig. 1, existing progressive stamping mould generally is provided with die shoe 1, following guide pin bushing 2, lower bolster 3, concave template 4, keeps circle 5, inner guiding post 6, stripper 7, height limiting plate 8, discharging spring 9, upper guide bush 10, fixed head 11, upper padding plate 12, discharging screw 13, upper bolster 14, correcting nail 15 and punch 16.Usually, the part of punching production all produces stamping-out fillet promptly collapse angle 21, euphotic belt 22, fracture belt 23 and burr 24 (referring to Fig. 2) naturally at its section.The generation at angle of collapsing is that in shear history, material can produce plastic deformation before fracture because stamping-out is to rely on shearing force that material is cut off, and promptly left behind by punch in the part material surface, forms the angle of collapsing.The collapse existence at angle of part upper surface and section joint portion arc transition makes the section effective area reduce; For being that working portion or upper surface and section joint portion are the product of working portion with this section, produce very big adverse effect; As reduce the life-span, run improperly quick etc.The method that existing employing reduces the angle of collapsing is: reduce the blade clearance, make the punch edge of a knife sharp.Though the method can reduce some angles of collapsing, effect is undesirable.Simultaneously, little owing to the gap, punch is quick-wearing very, and punch requires the edge of a knife sharp, so often need to repair mould, sharpening mouth.

Summary of the invention

The purpose of this utility model is to provide a kind of angle of collapsing that can significantly reduce the stamping-out section also can guarantee the part production in enormous quantities, reduces the progressive stamping mould of the maintenance and repair of progressive die.

The utility model has been done improvement on the basis of above-mentioned existing diel, other is provided with and cuts the muscle punch and cut punch in advance.The muscle angle of cutting of cutting the muscle punch is chosen as 20 °～60 °, cuts the muscle degree of depth and is (0.2～0.5) t, and t is the thickness of stamping material.

Because the utility model is provided with and cuts the muscle punch and cut punch in advance, makes the punching press deformation mechanism of part that significant improvement take place; Punching process is divided into three steps, that is: cuts muscle+cut in advance+essence and cut.The muscle punch is cut in a certain work step setting in the progressive stamping mould, and the band material is gone up with regard to the corresponding reinforcement cutting groove of going out; In this mould, on the position of subsequently a certain work step correspondence, reinforcement cutting groove is cut and part end face is roughly cut out by cutting punch in advance, its position and part position have certain distance, and this distance is exactly that essence is cut allowance.At a certain work step subsequently, to cut punch in the relevant position by essence and cut essence and cut allowance, essence cuts out the part profile.

Use the method, because it is very sharp to cut the muscle punch, it is more shallow again to cut the muscle degree of depth, so not only cut off material surface, and punch is far smaller than normal stamping-out to involving of material surface.Simultaneously, material is squeezed during owing to shaping, so the consequent angle of collapsing is very little.Cut the muscle punch and select the good material of tough shape for use, add and cut the muscle depth as shallow, so also be not easy to burst apart.At pre-cutting process, what cut is the material that breaks apart by chopping, and can not exert an influence to piece surface, promptly can not increase the angle of collapsing.At smart cutting process, excision is cut muscle and the splintery fracture of cutting in advance and is reached accessory size, because smart amount of cutting is very little, so also can not increase the angle of collapsing substantially.

Through in how secondary mould to the actual production of multiple material, the section angle of collapsing is controlled to very little and can guarantees stable mass production; Quality and efficient have been improved.The utility model is particularly useful for the punching production of metal materials such as iron that thickness is 0.8～5mm, copper.

Description of drawings

Fig. 1 is the structural representation of existing progressive stamping mould.

Fig. 2 is the part design sketch of existing progressive stamping mould punching production.In Fig. 2, bottom-right graph is that A is to schematic diagram.

Fig. 3 is the structural representation of the utility model embodiment.

Fig. 4 is the punching production schematic flow sheet of the utility model embodiment.

Fig. 5 cuts muscle punch schematic diagram for the utility model embodiment's.

Fig. 6 cuts the punch schematic diagram in advance for the utility model embodiment's.

The specific embodiment

Following examples are further described the structure accompanying drawing to the utility model.

As Fig. 3, shown in 4, the utility model is on existing progressive stamping mould basis (referring to Fig. 1), done improvement, the progressive stamping mould be provided with die shoe 1, down guide pin bushing 2, lower bolster 3, concave template 4, keep circle 5, inner guiding post 6, stripper 7, height limiting plate 8, discharging spring 9, upper guide bush 10, fixed head 11, upper padding plate 12, discharging screw 13, upper bolster 14, correcting nail 15 and punch, punch to be provided with and to cut muscle punch 19, cut punch 17 and essence in advance and cut punch 18.Make the punching production technology of part be divided into three steps: to cut muscle+cut in advance+essence and cut; The a certain step in the progressive stamping mould makes cuts muscle punch 19, and band material 20 (the band material is provided with correcting hole 201) is gone up with regard to the corresponding reinforcement cutting groove of going out.In this mould, on the position of subsequently a certain work step correspondence, reinforcement cutting groove is cut and part end face is roughly cut out by cutting punch 17 in advance, its position and part position have certain distance, and this distance is exactly that essence is cut allowance; At a certain work step subsequently, to cut punch 18 in the relevant position by essence and cut essence and cut allowance, essence cuts out the part profile.

Among Fig. 5, the muscle angle A of cutting of cutting muscle punch 19 is chosen as 20 °～60 °, and cutting muscle degree of depth h is (0.2～0.5) t, and t is the thickness of stamping material, is generally 0.8～5mm; L is part position and the distance of cutting the muscle center, value 0.1～1mm.

Among Fig. 6, L is part position and cuts distance between the punch in advance, value 0.1～1mm.

Claims

1, a kind of progressive stamping mould, be provided with die shoe, down guide pin bushing, lower bolster, concave template, maintenance circle, inner guiding post, stripper, height limiting plate, discharging spring, upper guide bush, fixed head, upper padding plate, discharging screw, upper bolster, correcting nail and punch, it is characterized in that said punch is provided with to cut the muscle punch and cut punch in advance.

2, a kind of progressive stamping mould as claimed in claim 1 is characterized in that the muscle angle of cutting of cutting the muscle punch elects 20 °～60 ° as.

3, a kind of progressive stamping mould as claimed in claim 1, it is characterized in that cutting the muscle degree of depth is 0.2～0.5t, t is the thickness of stamping material.