CN2564282Y

CN2564282Y - Bolt shaping mould

Info

Publication number: CN2564282Y
Application number: CN 02252982
Authority: CN
Inventors: 戚玉坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-02
Filing date: 2002-09-02
Publication date: 2003-08-06
Anticipated expiration: 2012-09-02

Abstract

The utility model relates to a bolt molding die which comprises an upper die and a lower die; wherein, an external sleeve is arranged on the upper die; the die cavity with a hexagonal inner hole is arranged in the central hole of the external sleeve; the external sleeve and an internal sleeve are connected with each other through hot pressing with a certain pre-stress between each other; the lower die is composed of a lower die sleeve and a lower die cavity which are connected with each other through hot pressing with a certain pre-stress between each other. The die can make the head part and the rod part be once hot formed, and the surface of the head part is bright and good in shape with the surface quality far exceeding the national standard requirement. The service life of the die is greatly prolonged, and is 40 to 50 times longer than the service life of the common bolt molding die. The utility model breaks through the bottleneck in hot-molding the head part during the production of a high-intensity bolt, making the high-intensity bolt enter a novel stage with high efficiency, good quality and low consumption. The utility model are widely applicable and economic, particularly in the field of railway vehicles, passenger vehicles and freight vehicles, suck as in producing TB/T1479-91 type special bolts with various specifications.

Description

The bolt shaping dies

Technical field

The utility model relates to a kind of mould, specifically, relates to the bolt shaping dies.

Background technology

Develop rapidly along with Chinese national economy, production technology to standard component is more and more higher with requirement, the industry that specific (special) requirements is especially arranged at secure context, in the manufacturing industry as the railway machine of China, visitor, lorry, because the raising of road speed, basic part bolt to connection and fastening usefulness has proposed new requirement, and the fastening force of bolt must satisfy the traffic safety after the speed-raising, and the high-strength bolt of so a large amount of different stages has been substituted the plain bolt that is adopted in the past.Because constantly bringing forth new ideas of national economy every field technology, along with a large amount of the withdrawing from and replaced of plain bolt by high-strength bolt, the explained hereafter high-strength bolt can not adapt to the needs of national economy fully routinely, and the production technology innovation of high-strength bolt has become the key of manufacturing high-strength bolt.

High-strength bolt has two kinds of processing modes at present, and a kind of method is special-purpose hexangle type steel processing bolt, and another kind of method is a rough forging, carries out machining then, and all there are a lot of drawbacks in these two kinds of methods.

With first kind is example, at first raw material are special rolling the forming of smelting, entering first being processed must anneal, pickling and finish draw external form, drop into the machining operation again, bolt from raw material to going out finished product, except that screw thread processing and heat treatment, must finish through multiple tracks machining operation, what so at first bring is that the special-purpose prices of raw and semifnished materials are higher than circular steel far away, secondly, raw material drop into after first being processed will be carried out numerous and diverse processing among the multiple tracks machining operation again, and this is just inevitable at raw material, mould, equipment, aspects such as the energy cause and big consumption, make manufacturing cost high.

The utility model content

The purpose of this utility model provides a kind of manufacturing high-strength bolt shaping dies.

Bolt shaping dies described in the utility model comprises upper die and lower die.Described patrix has the prestressing force overcoat, and being provided with endoporus in the centre bore of prestressing force overcoat is hexagonal six sides cover and lining.Have six side's die sleeves with its interference fit in the described six sides cover, the height of the little bolt head of height that its combination back aspect ratio six sides overlap has six side's pads with its interference fit in should overlapping in advance; Described counterdie comprises lower die-sleeve and lower mode cavity, and both pass through shrink fit.

Wherein, described die cavity is made up of six mould lobes.

Between described die-cushion and the six sides cover, be stationary fit between six side's pads respectively and between six side's pads and the lining, lining and the prestressing force overcoat.

The six sides cover of described patrix and the lower mode cavity of counterdie adopt Hardmetal materials.

Bolt shaping dies described in the utility model has adopted carbide alloy prestressing combination six sides cover patrix and prestressing force counterdie thermoforming technology can make the head and the bar portion one-step hot moulding of bolt, the surface-brightening of head is attractive in appearance, surface quality is considerably beyond the GB requirement, the life-span of mould improves greatly, is 40-50 times of plain bolt mould.And, make high-strength bolt production not only break through this bottleneck of head thermoforming, and make high-strength bolt enter efficient, a high-quality, the new stage of low consumption, especially being extensive use of in railway machine, visitor, lorry field, as produce TB/T1479-91 all size special bolt, can receive the remarkable economical effect.

Description of drawings

Fig. 1 is the cutaway view of bolt shaping dies described in the utility model;

Fig. 2 is that the A of Fig. 1 is to view;

Fig. 3 is the cutaway view of counterdie.

The specific embodiment

Referring to Fig. 1 and Fig. 3, bolt shaping dies described in the utility model comprises patrix 1 and counterdie 2.Described patrix 1 has overcoat 3, and being provided with endoporus in the centre bore of overcoat 3 is that hexagonal six sides cover 4 and lining 6, six sides cover 4 are interference fit with overcoat 3, makes it to have enough prestressing force and guarantees that six sides cover is with high life-span operate as normal.Described six sides overlap the six side's die-cushions 5 that have in 4 with its interference fit, the height of the little bolt head of height of its combination back aspect ratio six sides cover 4, and both assembling effects are the direct modules that guarantees the bolt head moulding.Having six side's pads 7 with its interference fit in lining 6, is to guarantee to satisfy the adjustment module of head compact dimensions after the mold integral assembling.

Between die-cushion 5 and the six sides cover 4, between six side pads 7 respectively and between six side's pads 4 and the lining 6, lining 6 and the prestressing force overcoat 3, all adopt stationary fit, with the assurance mould relative fixed of position at work.

Referring to Fig. 2, described six sides cover 4 is made up of six mould lobes 8.

Described counterdie comprises lower die-sleeve 9 and lower mode cavity 10, and both are by shrink fit, so has certain prestressing force between the two.

The cavity forming material of described upper die and lower die, promptly six sides of patrix cover 4 and lower mode cavity 10 all adopt Hardmetal materials, are the YG20C material as model.

Mould described in the utility model can reach the head and the bar portion one-step hot moulding of bolt, and the surface-brightening of head is attractive in appearance, and surface quality is considerably beyond the GB requirement, and the life-span of mould improves greatly, is 40-50 times of plain bolt mould.

When making mould described in the utility model, raw material must be annealed when going into operation after entering factory, pickling, phosphatization are handled, and raw material annealing is in order to protect mould, to improve die life with phosphatization.

Claims

1, bolt shaping dies, comprise patrix (1) and counterdie (2), it is characterized in that described patrix (1) has prestressing force overcoat (3), being provided with endoporus in the centre bore of prestressing force overcoat (3) is that hexagonal six sides overlap (4) and should overlap (6) in advance, six sides cover 4 is interference fit with prestressing force overcoat 3, have six side's die sleeves (5) in the described six sides covers (4) with its interference fit, the height of the little bolt head of height of its combination back aspect ratio six sides covers (4) should overlap the six side's pads (7) that have in (6) with its interference fit in advance; Described counterdie comprises lower die-sleeve (9) and lower mode cavity (10), and both pass through shrink fit.

2, bolt shaping dies according to claim 1 is characterized in that described six sides overlap (4) and are made up of six mould lobes (8).

3, bolt shaping dies according to claim 1 and 2 is characterized in that between described die-cushion (5) and the six sides covers (4), is stationary fit between six side's pads (7) respectively and between six side's pads (4) and the lining (6), lining (6) and the prestressing force overcoat (3).

4, bolt shaping dies according to claim 1 and 2 is characterized in that the six sides covers (4) of described patrix and the lower mode cavity (10) of counterdie adopt Hardmetal materials.

5, bolt shaping dies according to claim 3 is characterized in that the six sides covers (4) of described patrix and the lower mode cavity (10) of counterdie adopt Hardmetal materials.