CN2404613Y

CN2404613Y - Die set for cold heading for mfg. screw nut

Info

Publication number: CN2404613Y
Application number: CN 99244556
Authority: CN
Inventors: 范建军
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-15
Filing date: 1999-09-15
Publication date: 2000-11-08
Anticipated expiration: 2009-09-15

Abstract

The utility model relates to a die set for a cold heading for manufacturing screw nuts. The utility model comprises a cropping die which is made of hard alloy materials, a shaping die, and a forming die. The shape of each die forms a circular table shape, and each die has a definite cone angle. A die cavity of the cropping die is composed of a sizing zone with a cylindrical surface, and an advance angle, and the upper surface of the cropping die is composed of an inclined surface-shaped transition zone and a circular cutting edge. The shaping die and the forming die are respectively composed of an upper element and a corresponding lower element. A die cavity of the upper element is composed of an advance angle and a conic square surface, and the lower element of the shaping die is composed of a small conic square inclined surface-shaped and a cylindrical surface-shaped sizing zones and a back advance angle. The lower element of the forming die is composed of a cylindrical surface-shaped sizing zone and a back advance angle. The utility model has the advantages of simple structure, reasonable design, strong shock strength, long service life, little material wastage, low cost, smooth surface, and high precision.

Description

Be used to produce the cold pier set of molds of nut

The utility model relates to a kind of cold pier set of molds that is used to produce nut, particularly relates to the cold pier set of molds that is used for producing on the automatic cold pier make-up machine of five stations hexagonal (hexagon)nut.

The nut moulding of prior art generally is earlier wire rod to be cut off the cold pier in back or redly breaks into spherical stock, through repeatedly extruding and car, mill and process, because every operation distortion is big, so former material is had relatively high expectations, exist finished product accuracy low simultaneously, characteristics such as fineness is poor, the raw material loss is big, and production efficiency is low.

The purpose of this utility model is the shortcoming that overcomes prior art, and a kind of cold pier set of molds that is used to produce nut is provided.

The purpose of this utility model realizes that by following technical proposals the cold pier set of molds of production nut of the present utility model comprises blank mould, shaping mould and the mould that is made of Hardmetal materials; Described die shape is round table-like, the tapering that tool is certain; Described blank mold cavity is made of cylindrical so sizing area and back lead angle, and upper surface is made of scalene cone shape transition region and circular cutting edge; Described shaping mould, mould constitute by two combinations up and down, the last part die cavity of shaping mould and mould is made of lead angle and awl aspect, following of shaping mould is made of little inclined-plane, awl side, sizing area and back lead angle, and following of mould is made of sizing area and back lead angle.The utility model set of molds adopts round table-like profile and has certain tapering, can improve the restraining force of the formwork of Cold header to mould, shaping mould and mould constitute by upper and lower two simultaneously, can slow down in the cold pier process impact load to part under the mould, thereby in indeformable with the protection mould, as not burst prolongation mould service life, reduce production costs; The die cavity size of shaping mould and mould is to dwindle gradually, has satisfied the per pass operation and has been the small deformation amount, to improve nut surface fineness; The nut stock is through the cold pier of four operations, aspect awl and little inclined-plane, awl side all can fully finalize the design, guarantee that nut profile standard is unified, steady quality is reliable.

The utility model has the advantages that mould structure is simple, reasonable in design, impact strength is big, and long service life makes the nut of being produced need not grinding, and spillage of material is little, and cost is low, any surface finish, and precision height.Cold pier set of molds is by in conjunction with the rod that dashes on the cold pier make-up machine, makes cylindrical plate circle wire rod through cutting off, whole head, the automatic manufacturing procedure of high speed such as stock shaping, stock extruding, moulding, punching and produce best bright finish, high accuracy, nut cheaply.

Further specify the structure that is used to produce the cold pier set of molds of nut of the present utility model below in conjunction with accompanying drawing, wherein:

Fig. 1 is the profile of the blank mould in the cold pier set of molds of the utility model;

Fig. 2 is the side view of Fig. 1;

Fig. 3 is the profile of the shaping mould of the novel cold pier die assembly of this reality;

Fig. 4 is the side view of Fig. 3;

Fig. 5 is that the section of the mould in the cold pier set of molds of the utility model is to figure;

Fig. 6 is the side view of Fig. 5.

Among the figure:

1, lead angle 2, awl aspect 3, little inclined-plane, awl side

4, cylindrical so foot footpath distinguish 5, back lead angle 6, scalene cone shape transition region

7, part under part 9, the shaping mould on circular cutting edge 8, shaping mould and the mould

10, part 21, blank mould 22, shaping mould under the mould

23, mould

Referring to accompanying drawing, the cold pier set of molds profile that is used to produce nut of the present utility model is round table-like, and have certain tapering, described blank mould 21 die cavities are made of cylindrical so sizing area 4 and back lead angle 5, and upper surface is made of beveled transition region 6 and circular cutting edge 7; Described shaping mould 22 and mould 23 by last and corresponding part 9 and 10 down constitute, described part 8 die cavities of going up are made of lead angle 1 and awl aspect 2, and following 9 of shaping mould 22 by little inclined-plane 3, awl side, cylindrical so sizing area 4 and after lead angle 5 constitute; Following 10 of mould 23 is made of cylindrical so sizing area 4 and back lead angle 5.Described blank mould 21, shaping mould 22 and mould 23 are respectively charged in the formwork (not shown) of each operation of the cold pier automatic moulding machine of five stations, the connecting shaping machine dash rod with its raw material through cut-out, whole head, stock shaping.Extruding, moulding, perforation processing become hexagonal (hexagon)nut.

Claims

1, a kind of cold pier set of molds that is used to produce nut is characterized in that it comprises blank mould (21), shaping mould (22) and the mould (23) that is made of Hardmetal materials; Described die shape is round table-like, has certain cone angle; Described blank mould (21) die cavity is made of face of cylinder sizing area (4) and lead angle (5), and its upper surface is made of beveled transition region (6) and circular cutting edge (7); Described shaping mould (22) and shaping mould (23) are by last (8) and corresponding part (9) down and (10) formation, described part (8) die cavity of going up is made of lead angle (1) and awl aspect (2), and following (9) of shaping mould (22) are made of little inclined-plane, awl side (3), cylindrical so sizing area (4) and back lead angle (5); Following (10) of mould (23) are made of cylindrical so sizing area (4) and back lead angle (5).