CN102489567A

CN102489567A - Core head for producing 90-degree hot push elbow

Info

Publication number: CN102489567A
Application number: CN2011104434792A
Authority: CN
Inventors: 陈少忠; 张吉华
Original assignee: Jiangyin Zhongnan Heavy Industry Furnishment Co Ltd
Current assignee: Jiangyin Zhongnan Heavy Industry Furnishment Co Ltd
Priority date: 2011-12-27
Filing date: 2011-12-27
Publication date: 2012-06-13

Abstract

The invention relates to a core head for producing a 90-degree hot push elbow. The core head for producing the 90-degree hot push elbow comprises a connecting section and a bending section and is characterized in that: the bending section consists of a transition section, a bending section and a shaping section; the angle alpha of the bending section is 90 degrees; the angle beta of the transition section is 15 degrees; the angle gamma of the bending section is 55 degrees; and the angle delta of the shaping section is 20 degrees. The core head for producing the 90-degree hot push elbow has the advantages that: a small part of the produced 90-degree hot push elbow is cut during alignment; the thinning ratio of the side wall thickness of the elbow outer arc is small; and extrusion shaping is not required.

Description

Be used to produce 90 ° of core prints that pick elbow

Technical field

The present invention relates to a kind of core print, relate in particular to a kind of 90 ° of core prints that pick elbow that are used to produce.

Background technology

Be used to produce 90 ° of core prints that pick elbow at present and comprise linkage section and bending section; Owing to do not arch upward in linkage section and bending section anastomosis, and the angle of bending section is 60 °, makes the outer arc movement velocity big, causes 90 ° of elbow outer arc sides of production oversize, and the amount of prescinding is too big in the time of neat mouthful, wastes steel; Make 90 ° of elbow outer arc side thickness reductions often surpass GB allowed band (12.5%) simultaneously; Owing to do not have land at the rear portion of bending section, the two ends bore that elbow often takes place is inequality, also needs the shaping press to be extruded to shape once again, wastes the equipment electricity charge, manual work thus simultaneously.

Summary of the invention

To above-mentioned shortcoming, the object of the invention is to provide a kind of 90 ° of core prints that pick elbow that are used to produce, and it can make 90 ° of production to pick elbow the amount of prescinding is little in the time of neat mouthful, elbow outer arc side thickness reduction is little and need not to be extruded to shape again.

Technology contents of the present invention is: a kind ofly be used to produce 90 ° of core prints that pick elbow; Comprise linkage section and bending section; It is characterized in that bending section is made up of changeover portion, bending section and land, the angle [alpha] of bending section is 90 °, and the angle beta of its changeover portion is 15 °, and bending section angle γ is 55 °, and land angle δ is 20 °.

The advantage that is compared with prior art had of the present invention is:

1, bending section increases to 90 ° by 60 °, and wherein 20 ° as land, makes steel pipe after the hot bending hole enlargement, progressively is shaped into predetermined size, and better appearance need not to finalize the design again.

2, let bending section begin to arch upward by the changeover portion that is connected with linkage section; Suppress the fltting speed of outer arc side, avoid the outer arc side long, the inside and outside end face of elbow that makes 90 ° is neat, reduced cutting output; Can shorten the blank length of tube, practice thrift raw-material about 5%.

The outer arc side thickness reduction of 90 ° of elbows 3, producing is by reducing to more than-12.5% in-8～10%, the bearing strength that can increase elbow with increase the service life, the user is satisfied.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is existing 90 ° of structural representations that pick the core print of elbow.

Specific embodiment

A kind of 90 ° of core prints that pick elbow that are used to produce as shown in Figure 1; Comprise linkage section 1 and bending section 2; It is characterized in that bending section 2 is made up of changeover portion 2.1, bending section 2.2 and land 2.3, the angle [alpha] of bending section 2 is 90 °, and the angle beta of its changeover portion 2.1 is 15 °, and bending section 2.2 angle γ are 55 °, and land 2.3 angle δ are 20 °.

A kind of existing 90 ° of core prints that pick elbow that are used to produce as shown in Figure 2; Comprise linkage section 3 and bending section 4; The angle ε of bending section 4 is 60 °.

Claims

1. one kind is used to produce 90 ° of core prints that pick elbow; Comprise linkage section (1) and bending section (2); Levying is that bending section (2) is made up of changeover portion (2.1), bending section (2.2) and land (2.3), and the angle [alpha] of bending section (2) is 90 °, and the angle beta of its changeover portion (2.1) is 15 °, and bending section (2.2) angle γ is 55 °, and land (2.3) angle δ is 20 °.