CN201693060U - Male mould of soft metal piece inner hole extruding and fine blanking die - Google Patents

Abstract

The utility model discloses a male mould of a soft metal piece inner hole extruding and fine blanking die. One end of the male mould is fastened with an upper die plate while the other end thereof adopts a punch, and the position of the punch corresponds to that of a pre-pierced hole of a soft metal piece clamped on a lower die plate, the punch comprises a tapered guiding part and a fine blanking part, the conic bottom of the tapered guiding part is in smooth transition with the fine blanking part, and the diameter of the fine blanking part is identical to that of the inner hole which needs to be formed on the soft metal piece. Since soft metal pieces to be processed, such as red copper pieces, have strong plasticity and deformability, serious abrasion of the male mould is avoided during the extruding and fine blanking process, thereby effectively protecting machining dies. Moreover, since the precision of the extruding and fine blanking is high, the product percent of pass can be effectively improved and ensured.

Description

The punch of a kind of soft metal part endoporus extruding fine blanking die

Technical field the utility model relates to a kind of metalwork processing mold, relates in particular to the punch of a kind of soft metal part endoporus extruding fine blanking die.

Make in the background technology prior art and adopt fine blanking die the endoporus of soft metal part (as red copper etc.), as shown in Figure 1, 2, the drift 01 of fine blanking die is a flush end, when processing soft metal part 4 endoporus, stamping-out forms pre-punched hole 41 on soft metal part 4 earlier, utilize fine blanking die that pre-punched hole is carried out essence again and dash, at this moment, the edge of a knife 02 of drift 01 forms the endoporus that meets production requirement with the inner surface redundance cutting back of pre-punched hole 41 on the soft metal part 4.Adopt this fine blanking die, need often drift 01 to be carried out sharpening, and the replacing frequency height of drift 01, the die cost height.When the edge of a knife 02 of drift 01 did not reach processing request, the defect rate of producing product was also than higher.

The summary of the invention the purpose of this utility model provides a kind of punch that can dash formation soft metal part endoporus by the extruding essence.

For achieving the above object, the drift of punch of the present utility model comprises taper targeting part and smart in part, and the conical base of taper targeting part and the smart part of dashing seamlessly transit, and smart diameter towards part is consistent with the diameter of bore that the soft metal part need form.

Adopt structure of the present utility model, when the endoporus of processing soft metal part, punch is driven by top board and moves downward, the conical base of the taper targeting part of punch is introduced into the pre-punched hole of soft metal part, because the conical base of taper targeting part seamlessly transits with the smart part of dashing, so along with the moving downward of punch, pre-punched hole is subjected to the extruding generation deformation of punch, final drift enters pre-punched hole, the pre-punched hole extruding is formed the endoporus of product requirement.Because processing object is the soft metal part, as red copper etc., its plasticity and deformability are all very strong, can not cause big wearing and tearing to punch smart the breaking through of extruding in the journey, thereby have protected processing mold effectively.In addition, the smart precision height that dashes of extruding, the qualification rate of product can be effectively improved and guarantee.

Description of drawings is described in further detail the utility model below in conjunction with the drawings and specific embodiments:

Fig. 1 is the diel structural representation of prior art;

Fig. 2 is the structural representation of the drift of prior art;

Fig. 3 is a mould structure schematic diagram of the present utility model;

Fig. 4 is a punch structure schematic diagram of the present utility model.

The specific embodiment is shown in Fig. 3,4, one end 11 of punch 1 of the present utility model is fastening with cope match-plate pattern 2, the other end 12 of punch 1 is a drift, its position is corresponding with pre-punched hole 41 positions of the soft metal part 4 that is clamped in lower bolster 3, wherein, described drift 12 comprises taper targeting part 121 and essence towards part 122, and the conical base 123 of taper targeting part 121 seamlessly transits towards part 122 with smart, and smart diameter towards part 122 needs the diameter of bore of formation consistent with soft metal part 4.

When the endoporus of processing soft metal part 4, punch 1 is driven by top board 2 and moves downward, the conical base 123 of the taper targeting part 121 of punch 1 is introduced into the pre-punched hole 41 of soft metal part 4, because taper targeting part 121 is expanded gradually by conical base 123 and is smoothly transitted into smart in part 122, so along with moving downward of punch 1, pre-punched hole 41 is subjected to the extruding generation deformation of drift 12, and final essence enters pre-punched hole 41 towards part 122, and pre-punched hole 41 extruding are formed the endoporus that reaches product requirement.

Claims (1)

1. the punch of a soft metal part endoporus extruding fine blanking die, it is characterized in that: the drift of this punch comprises taper targeting part and smart in part, the conical base of taper targeting part is dashed part with essence and is seamlessly transitted, and it is consistent with the diameter of bore that the soft metal part need form that essence is dashed diameter partly.

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