CN205289614U

CN205289614U - Cascaded prestressing force mould structure

Info

Publication number: CN205289614U
Application number: CN201521025484.1U
Authority: CN
Inventors: 王恩洪
Original assignee: China Aviation Industry Standard Parts Manufacturing Co Ltd
Current assignee: China Aviation Industry Standard Parts Manufacturing Co Ltd
Priority date: 2015-12-11
Filing date: 2015-12-11
Publication date: 2016-06-08
Anticipated expiration: 2025-12-11

Abstract

The utility model discloses a cascaded prestressing force mould structure, including overcoat (1) and inner core (2), the overcoat has single cylinder hole (3), excircle (4) of inner core are the cascaded face of cylinder, have the cascaded face of cylinder inlay inner core (2) in single cylinder hole (3) of overcoat. Have the characteristics of life far above current structure.

Description

A kind of staged prestress die lamps structure

Technical field

This utility model belongs to field of mechanical technique, is specifically related to a kind of staged prestress die lamps structure.

Background technology

Bushing formula prestress die lamps structure is one of conventional shaping dies of pressure processing, bushing purpose is to utilize die coat and the inner core stress that produces because of interference fit when assembling to improve the radial direction anti-pressure ability of mould, to be mainly used in the occasion of radial force or radially and axial stress simultaneously.

Bushing formula prestress die lamps structure is widely used, and is the common mould structure of plastic forming process, mainly heat forming technique, cold upset forming technique, the temperature Plastic Forming such as upsetting forming technology and cold extrusion technology mould in application.

But, the service life of this bushing formula pre-stress die falls short of, and is insufficient for the demand of industry production.

Utility model content

The purpose of this utility model be in that to overcome aforementioned difficulties and provide a kind of service life at least staged prestress die lamps structure of high 5 times than existing structure.

A kind of staged prestress die lamps structure of the present utility model, including overcoat and inner core, described overcoat has single cylindrical hole, and the cylindrical of described inner core is the staged face of cylinder, and the described inner core with the staged face of cylinder is embedded in the single cylindrical hole of described overcoat.

Above-mentioned a kind of staged prestress die lamps structure, wherein: the described staged face of cylinder is transition face be 5-10 �� cone half-angle three grades of staged faces of cylinder.

Above-mentioned a kind of staged prestress die lamps structure, wherein: in described three grades of staged faces of cylinder, the magnitude of interference between each face of cylinder be distributed respectively greatest circle cylinder place be the 100% of total magnitude of interference, middle circle cylinder place is the 60-70% of total magnitude of interference, smallest circle cylinder place is the 30-40% of total magnitude of interference.

Above-mentioned a kind of staged prestress die lamps structure, wherein: in described three grades of staged faces of cylinder, the length on each face of cylinder respectively greatest circle cylinder be the 25% of staged pre-stress die structure length, middle circle cylinder be the 55% of staged pre-stress die structure length, smallest circle cylinder be the 20% of staged pre-stress die structure length.

This utility model is compared with prior art, there is obvious beneficial effect, as can be known from the above technical solutions: this utility model is different from existing bushing formula prestress die lamps structure, the endoporus of existing mold structure overcoat and the cylindrical of inner core are the single face of cylinder, inner core outside diameter is slightly larger in dimension than overcoat diameter of bore size and obtains with interference fit, and only having die coat in this utility model is the single face of cylinder, the cylindrical of inner core is the staged face of cylinder, this structure makes prestress die lamps structure inlay resultant force higher, and has longer service life.

Accompanying drawing explanation

Fig. 1 is the overcoat of this utility model staged prestress die lamps structure;

Fig. 2 is the inner core 1 of this utility model staged prestress die lamps structure;

Fig. 3 is the mold core 2 of this utility model staged prestress die another opening form of lamps structure.

Labelling in figure:

1, overcoat, 2, inner core, 3, cylindrical hole, 4, inner core cylindrical.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, this utility model is described in detail.

As Figure 1-3, staged prestress die lamps structure of the present utility model, including overcoat 1 and inner core 2, described overcoat has single cylindrical hole 3, the cylindrical 4 of described inner core is the staged face of cylinder, and the described inner core 2 with the staged face of cylinder is embedded in the single cylindrical hole 3 of described overcoat.

Before Making mold, first determine the working condition of pre-stress die, and then determine load (stress) distribution situation, calculate the magnitude of interference needed for pre-stress die, then the magnitude of interference and the length on each staged face of cylinder are calculated respectively, the dimensional values making diameter in overcoat according still further to the magnitude of interference on each staged face of cylinder calculated and the length dimension calculated produce staged inner core (see Fig. 2, Fig. 3), are finally pressed in overcoat (see figure 1) and namely obtain required staged pre-stress die by staged inner core forcing press.

Specifically: a pre-stress die, its aperture d=5mm, length L=60mm, the deformation force needed when workpiece deforms on mould is 600Mpa.

It is computed, this pre-stress die needs the magnitude of interference of 0.30mm, then to be 0.30mm, middle circle cylinder place be at the magnitude of interference of each ladder of inner core cylindrical respectively greatest circle cylinder place 0.20mm, smallest circle cylinder place are 0.10mm, and the length of each ladder respectively greatest circle cylinder is 15mm, middle circle cylinder be 33mm, smallest circle cylinder is 12mm.

Thus draw, inner core greatest circle cylinder length (size L1) namely from the magnitude of interference of end face distance 0mm-15mm section be 0.30mm, smallest circle cylinder (size L2) is namely 0.1mm from the magnitude of interference of end face distance 48mm-60mm section, stage casing namely from the magnitude of interference of end face distance 15mm-48mm section be 0.20mm.

The basic size choosing inner core outside diameter and overcoat diameter of bore is 15mm, then when manufacturing, overcoat endoporus is of a size of 15.00mm, diameter d1, d2, d3 respectively 15.30mm, 15.20mm, the 15.10mm on the inner core staged face of cylinder.

Summary data can prepare the overcoat shown in Fig. 1 and the inner core shown in Fig. 2, is pressed in overcoat by inner core, obtains the pre-stress die of the corresponding magnitude of interference.

The above, it it is only preferred embodiment of the present utility model, not this utility model is done any pro forma restriction, any without departing from technical solutions of the utility model content, any simple modification, equivalent variations and modification above example made according to technical spirit of the present utility model, all still falls within the scope of technical solutions of the utility model.

Claims

1. a staged prestress die lamps structure, it is characterized in that: include overcoat (1) and inner core (2), described overcoat has single cylindrical hole (3), the cylindrical (4) of described inner core is the staged face of cylinder, and the described inner core (2) with the staged face of cylinder is embedded in the single cylindrical hole (3) of described overcoat.

2. staged prestress die lamps structure as claimed in claim 1 a kind of, it is characterised in that: the described staged face of cylinder is transition face is three grades of staged faces of cylinder of 5-10 �� of cone half-angle.

3. a kind of staged prestress die lamps structure as claimed in claim 2, it is characterized in that: in described three grades of staged faces of cylinder, the magnitude of interference between each face of cylinder be distributed respectively greatest circle cylinder place be the 100% of total magnitude of interference, middle circle cylinder place is the 60-70% of total magnitude of interference, smallest circle cylinder place is the 30-40% of total magnitude of interference.

4. a kind of staged prestress die lamps structure as claimed in claim 2 or claim 3, it is characterized in that: in described three grades of staged faces of cylinder, the length on each face of cylinder respectively greatest circle cylinder is the 25% of staged pre-stress die structure length, middle circle cylinder is the 55% of staged pre-stress die structure length, smallest circle cylinder is the 20% of staged pre-stress die structure length.