CN202290917U

CN202290917U - Eccentric mold

Info

Publication number: CN202290917U
Application number: CN2011204071671U
Authority: CN
Inventors: 季历程
Original assignee: Nantong Tianhua Herui Technology Entrepreneurship Co Ltd
Current assignee: Nantong Tianhua Herui Technology Entrepreneurship Co Ltd
Priority date: 2011-10-24
Filing date: 2011-10-24
Publication date: 2012-07-04
Anticipated expiration: 2021-10-24

Abstract

The utility model relates to an eccentric mold. The eccentric mold consists of a mold shaft 1 and a curve handle rotating shaft 2, wherein certain eccentricity exists between the center of the curve handle rotating shaft 2 and the center of the mold shaft 1; the offset distance between the center of the curve handle rotating shaft 2 and the curve starting direction of the center of the mold shaft 1 is a, and the offset distance between the center of the curve handle rotating shaft 2 and the straight line section direction of the center of the mold shaft 1 is b; and the offset distance b is equal to 1.1 a. According to the eccentric mold, the deformation amount of the mold is relatively great; the quality of pipe walls is improved; and the technical effects are good.

Description

A kind of eccentric type tire

Technical field

The utility model relates to bending fixture structural design and applied technical field, and a kind of eccentric type tire is provided especially.

Background technology

At industry fields such as auto industry, shipbuilding industry, aircraft industry, guiding-tube bend is one of operation basic in the conduit manufacture process.It is multiple that the guiding-tube bend method is pulled out usually is curved, the volume curved, mould is curved etc., has following common ground during bend pipe: tube bending cylindrical tube wall attenuation even break; Pipe wall meeting thickening even wrinkling in the tube bending; The pipe cross section can become ellipse even shrivel.Especially to thin wall tubule, bending radius is during less than 1.5 times of pipe diameters, and the knee is easy to generate fold, and usual way can't satisfy unruffled requirement.

People expect to obtain the good eccentric type tire of a kind of technique effect.

Summary of the invention

The purpose of the utility model is the eccentric type tire that provides a kind of technique effect good to be particularly useful for thin wall tubule, and bending radius is less than 2 times, even less than the situation of 1.5 times of pipe diameters.

The utility model provides a kind of eccentric type tire, is made up of tyre-model shaft 1 and crank handle rotating shaft 2, and there is certain eccentric throw at the center of said crank handle rotating shaft 2 and its tyre-model shaft 1 center; It is characterized in that: it is a that the center of said crank handle rotating shaft 2 bends away beginning side's offset distance to mind-set in the tyre-model shaft 1, and the center of said crank handle rotating shaft 2 is to mind-set straightway side offset distance b in the tyre-model shaft 1; Said offset distance b=1.1a.

Because there is certain eccentric throw at center and its tyre-model shaft 1 center of crank handle rotating shaft 2, material flows to and just is different from usually when crooked during guiding-tube bend, has improved wrinkling situation, and the while eccentric throw has guaranteed required ovality.

Further preferred: b equals 0.1-0.15 times of crank handle rotating shaft diameter value.Make deflection relatively large, help to improve the tube wall quality.

The conduit of the eccentric type tire institute brake forming that use the utility model provides can satisfy the designing requirement to fold, is applicable to thin wall tubule, particularly the brake forming of the thin wall tubule of small-bend radius.

Description of drawings

Fig. 1 is the structural representation of eccentric type tire;

Fig. 2 is the left view of eccentric type tire.

The specific embodiment

Embodiment 1

A kind of eccentric type tire is made up of tyre-model shaft 1 and crank handle rotating shaft 2, and there is certain eccentric throw at the center of said crank handle rotating shaft 2 and its tyre-model shaft 1 center; It is a that the center of said crank handle rotating shaft 2 bends away beginning side's offset distance to mind-set in the tyre-model shaft 1, and the center of said crank handle rotating shaft 2 is to mind-set straightway side offset distance b in the tyre-model shaft 1; Said offset distance b=1.1a.

Also have 0.1-0.15 that following requirement: b equals crank handle rotating shaft diameter value doubly.Make deflection relatively large, help to improve the tube wall quality.

In the concrete corresponding background, also satisfy following requirement:

Conduit Φ 5, wall thickness δ=0.3, radius of curvature R 6.5 bends to 180 ° of angles; The offset distance a=b=0.1 of bent moulding base of eccentric structure; No wrinkle; Ovality: 0.6 ~ 0.75mm.

Claims

1. a bent moulding base of eccentric structure is made up of tyre-model shaft (1) and crank handle rotating shaft (2), and there is certain eccentric throw at the center of said crank handle rotating shaft (2) and its tyre-model shaft (1) center; It is characterized in that: it is a that the center of said crank handle rotating shaft (2) bends away beginning side's offset distance to mind-set in the tyre-model shaft (1), and the center of said crank handle rotating shaft (2) is to mind-set straightway side offset distance b in the tyre-model shaft (1); Said offset distance b=1.1a.

2. according to the said bent moulding base of eccentric structure of claim 1, it is characterized in that: b equals 0.1-0.15 times of crank handle rotating shaft diameter value.