CN2686755Y

CN2686755Y - Toothed-part cold-extrusion shaping mould

Info

Publication number: CN2686755Y
Application number: CN 200420004472
Authority: CN
Inventors: 王德俊; 张凌云; 高英
Original assignee: Institute Of Mechanical Hebi College Of Vocation And Technology
Current assignee: Institute Of Mechanical Hebi College Of Vocation And Technology
Priority date: 2004-02-23
Filing date: 2004-02-23
Publication date: 2005-03-23
Anticipated expiration: 2014-02-23

Abstract

The utility model discloses a toothed-part cold-extrusion shaping die, mainly relating to the field of the shaping female die of the toothed-part cold-extrusion die. The toothed-part cold-extrusion shaping die is designed to solve that the shaping female dies of the existing toothed-part cold-extrusion shaping dies are integrated and are uneasy to process when the toothed-part shaping female dies with complicated shapes are manufactured, and simultaneously, the quality is difficult to ensure, and the shaping female dies are easy to crack when the shaping female dies are integrated and the toothed-part are extruded with coldness. The female die guide sleeve of the toothed-part shaping female die is made to be a separated combined type with the shaping female die, i. e. a female die sleeve (2) is correspondently sheathed outside the shaping female die (1) whose external shape is round table shaped. The upper end surface of the female die sleeve (2) is provided with a female die guide sleeve (3), and container rings (4) are correspondently sheathed at the surface parts of the outer sides of the female die sleeve (2) and the female die guide sleeve (3). The utility model is mainly used for the cold extrusion shaping of the miniature toothed-parts on a hydraulic machine tool.

Description

The cold extrusion molding mould of profile of tooth class part

(1) technical field: the cold pressing forming mould class relates generally to the cold extrusion shaped die field of profile of tooth class part.

(2) background technology: the production of profile of tooth class part is mostly also adopted machine cut processing in machinery plant at present, not only raw materials consumption is big, miscellaneous because of manufacturing procedure simultaneously, single-piece work is many man-hour, the production cost height, economic benefit is low, and owing to the single-piece production manually-operated, the uniformity of product quality is also poor simultaneously; In recent years, small-sized profile of tooth class part with certain batch has been started and has been utilized mould once cold extrusion shaped on press machine tool, has improved work efficiency greatly, has reduced raw-material waste, guarantee the uniformity of product quality, obtained remarkable economic efficiency and social benefit.All applied widely in the big car industry of consumption, motorcycle industry, agricultural vehicle industry.In adopting mould extrusion modling profile of tooth class part, find that also the integral combined molding concave die of profile of tooth class part reaches the weak point in using in processing and manufacturing, whole die as the profile of tooth class part of processed complex, because of technology numerous and diverse, not only machining accuracy is difficult to guarantee and process whole die expense extra-high-speed, also can occur machining the situation of whole die sometimes; The whole die of profile of tooth class part is in the use of cold extrusion profile of tooth class part, and also normal the discovery is prone to crackle and causes mould to be scrapped in the die guide pin bushing of whole die and the corner 5 of molding concave die transition.＜see Fig. 2 〉

(3) summary of the invention:

Technical problem to be solved in the utility model is: be convenient to the molding concave die processing and manufacturing of profile of tooth class component die, improve machining accuracy simultaneously, reduce the processing and manufacturing cost of molding concave die; In processing and manufacturing profile of tooth class part uses mold process, prolong molding concave die service life.

The technical scheme that solves the problems of the technologies described above: the integral combined die of existing profile of tooth class part cold extrusion molding mould is made the die guide pin bushing and molding concave die is the combined die of split, promptly outside being the molding concave die of truncated cone-shaped, profile is set with die case accordingly, the die guide pin bushing is housed on the die case upper surface, outer surface part at die guide pin bushing die case is set with shrink ring accordingly.

The beneficial effects of the utility model: 1, because the die guide pin bushing of molding concave die and molding concave die split manufacturing, be convenient to the processing of each part, especially the molding concave die to complexity adds man-hour, be convenient to the location, in wire cutting machine tool processing, design optimal discharge gap, wire travelling speed and molybdenum filament diameter easily, the dimensional tolerance of the molding concave die that processes and form and position tolerance all reach high accuracy, and surface roughness is low; 2: because die guide pin bushing and molding concave die are split type, when processing profile of tooth class part uses this split combined die, eliminate the generation of integral combined die guide pin bushing and molding concave die transition corner crackle, prolonged the service life of mould, reduced production cost; 3: owing to molding concave die is processed separately, accuracy of manufacture height, thus the profile of tooth class part that processes has also improved precision, has reduced to throw and has ground workload; 4: since through experiment repeatedly determined die new go into modular angle and land, during extrusion modling, help flowing of metal, reduced the wearing and tearing of mould, improved the die life-span.

(4) description of drawings:

Fig. 1 is an external tooth form class part separate assembling molding concave die structural representation of the present utility model;

Fig. 2 is the existing integral combined die structural representation of cold extrusion external tooth form class part.

(5) specific embodiment:

With reference to Fig. 1, this molding concave die during fabrication, the material of molding concave die should be selected W for use ₆M ₀₅Cr ₄V ₂The land of molding concave die and go into modular angle through experiment repeatedly, practicable land is 2-3.5mm, goes into modular angle and should be controlled in 12 ° of-18 ° of scopes, it is moving to help metal circulation, reduces the wearing and tearing of molding concave die, improves the life-span of mould.The die guide pin bushing and the molding concave die of the cold extrusion shaped die of profile of tooth class part are made separate assembling, profile is that the molding concave die 1 of truncated cone-shaped is processed by wire cutting machine tool, when machining prgraming, should give the correction-compensation amount, through test correction-compensation amount δ=(1.2-1.5) *-Δ, in the formula * for modification coefficient, Δ for throwing the amount of grinding.On the outer truncated cone-shaped side of the molding concave die of being processed into 1, be set with die case 2 accordingly, when processing die case 2, should consider the pressing contraction distortion amount when molding concave die 1 and die case 2 cooperate, die guide pin bushing 3 is housed on the die case upper surface, lateral surface part at die case 2 and die guide pin bushing 3 is set with shrink ring 3 accordingly.

To the structure of the molding concave die of internal tooth class profiled parts with make with above-mentioned external tooth form class forming parts die.

When the utility model is used at cold extrusion external tooth form class part, this mould is contained in the mould bases of hydraulic press.External tooth form class part blank to extrusion modling will carry out the soft annealing processing earlier, blank after the processing should be prepared into has certain dimensional accuracy, because of the precision of external tooth form class part blank endoporus will have direct relation with the back-geared circular runout of extrusion modling, the big young pathbreaker of diameter of bore and blank outside dimension determines that whether qualified extrusion modling backgear size is simultaneously, through testing the relational expression of definite blanking inner hole and outside dimension: D=da+K-Z; D=do+Z+X is in the formula: D-blank external diameter; D-blanking inner hole diameter; K-technology allowance; Da-tip diameter; Do-part diameter of bore; Z-technology gap; X-radial contraction amount.The blank that processing and preparing is good is put into mould, is squeezed into desired profiled parts by the hydraulic press pressurization, after throwing is developed into finished product.

Claims

1, the cold extrusion molding mould of profile of tooth class part, comprise die, it is characterized in that the die guide pin bushing and the molding concave die of profile of tooth class part die are made separate assembling, promptly outside being the molding concave die (1) of truncated cone-shaped, profile is set with die case (2) accordingly, die guide pin bushing (3) is housed on the upper surface of die case (2), outer surface part at die case (2) and die guide pin bushing (3) is set with shrink ring (4) accordingly.

2, the cold-extrusion shaping mould of profile of tooth class part according to claim 1 is characterized in that the land 2-3.5mm of described profile of tooth class forming parts die (1) going into modular angle in 12 ° of-18 ° of scopes.