CN201537654U - Special blanking die for blanking complete smooth face - Google Patents

Abstract

The utility model relates to a special blanking die for blanking complete smooth face, which is composed of a concave die and a convex die. The special blanking die is characterized in that a fit clearance between the concave die and the convex die ranges from 0.01mm to 0.02mm, and a blanking structural face of lower portion edge of the convex die presents an arc face. By limiting the fit clearance between the concave die and the convex die to be within a slight clearance range and correcting a right angled cutting face of the lower portion edge of a punching die into an arc cutting face, all processed faces of blanked work-pieces are formed into smooth faces at one time.

Description

The special-purpose blanking die of the full light face of a kind of stamping-out

Technical field

The utility model relates to a kind of machined tool, the special-purpose blanking die of the full light face of especially a kind of stamping-out.

Background technology

In traditional process for machining; with recessed; it is a kind of normally used processing method that punch cooperates the stamping-out processing of carrying out workpiece to handle; but because this method use is recessed; cooperation between protruding still rests on traditional fit clearance; also itself reasonably improving not simultaneously to male and female mold; therefore the surface of this traditional stamping-out gained as shown in Figure 4 state occurs through regular meeting: on the top of blanking part 4; there is fillet (angle of collapsing) slightly at R position among Fig. 4; then being the cutting part G position (light face) of light, is the burr part M position (hair side) of fracture at last.Though mach some product to these hair sides of existing without limits, cannot have hair side, for example product of guide rail component and so on during to the other product.Some punching parts also must carry out the deburring processing for this reason.Though accomplish to see that workpiece has smooth machined surface, can take some other processing method, too expensive as also accomplishing with line cutting, radium-shine processing technology, concerning some mill run processing are arranged, or not most economical material benefit.

Therefore, how to seek out a kind of easy blanking method and solve the problem that exists in the common machine process, just become the problem that machine operations employee and person skilled are considered.

The utility model content

The purpose of the present utility model: be intended to propose a kind of both economical, practical special-purpose blanking die that can be used for the full light face of stamping-out.

The special-purpose blanking die of the full light face of this stamping-out is made up of die and punch, it is characterized in that: the fit clearance between the described concave, convex mould is between 0.01～0.02mm, and the stamping-out structural plane of described punch lower edge is cambered surface.

The special-purpose blanking die of the full light face of this stamping-out that proposes according to above technical scheme, fit clearance by concave, convex mould that stamping-out is used is limited in the very trickle interstice coverage, while is modified as the circular arc shear surface to the square shear surface of stamping die lower edge again, therefore makes and carries out all disposable shiny surface that becomes of all machined surfaces that stamping-out is cut workpiece.

Description of drawings

Fig. 1 is the structural representation of the utility model mould;

Fig. 2 is the form schematic diagram in the utility model process;

Fig. 3 is a traditional moulds machining state schematic diagram;

Fig. 4 is the traditional moulds structural representation;

Fig. 5 is the form schematic diagram in traditional grinding tool process.

The specific embodiment

The special-purpose blanking die of the full light face of this stamping-out as shown in the figure, it is a kind of improvement to the blanking mould that generally uses now, blanking die after the improvement, still form by die 2 and punch 1, it is characterized in that: the fit clearance between the described concave, convex mould is between 0.01～0.02mm, and the stamping-out structural plane of described punch 1 lower edge is cambered surface.

Change the little matched in clearance of 0.01～0.02mm into by big matched in clearance, change traditional right angle sharp edge of a knife of face of punch 1 into the circular arc type edge of a knife concavo-convex mould.In the three phases of finishing the stamping-out process (strain, plastic deformation and shear stage).What the technical program mainly changed is exactly shear stage.When the suffered stress of material near die 2 sword limits at first reaches maximum (being equivalent to the material shearing strength), make die sword sapwood material that the crack take place.Continue to clamp-on material at punch 1, when the suffered stress of material on punch sword limit also reached the shearing stress of material, the material on punch sword limit also produced shear crack, because punch sword limit is a circular arc, so shear crack is on circular arc.So (size of the circular arc of punch cutting edge is relevant with the shearing strength of material.) punch continues down, the material of the inside, crack is pushed into die 2, and the material of outside, crack is clamp-oned die by the arc surface of punch.Make the blanking part surface of stamping-out gained be smooth surface like this.

Claims (1)

1. the special-purpose blanking die of the full light face of stamping-out is made up of die and punch, it is characterized in that: the fit clearance between the described concave, convex mould is between 0.01～0.02mm, and the stamping-out structural plane of described punch lower edge is cambered surface.

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