CN201543719U

CN201543719U - Hot-press forming mold for thick-wall elbow pipe fitting with straight pipe section

Info

Publication number: CN201543719U
Application number: CN2009201809677U
Authority: CN
Inventors: 孙耘; 刘建昌
Original assignee: WUXI CITY XINFENG PIPE CO Ltd
Current assignee: Wuxi City Xinfeng Pipe Co., Ltd.
Priority date: 2009-12-01
Filing date: 2009-12-01
Publication date: 2010-08-11
Anticipated expiration: 2019-12-01

Abstract

The utility model relates to a hot-press forming mold for a thick-wall elbow pipe fitting with a straight pipe section, comprising a pre-pressing mold and a bending mold. The pre-pressing mold comprises an upper pre-pressing mold and a lower pre-pressing mold, a mold cavity of the pre-pressing mold after combination is elliptical, and the relationship between the length D1 of a long axis of the mold cavity and the diameter D0 of a pipe blank is D1=D0+(5%-7%)*D0; and the bending mold comprises an upper bending mold and a lower bending mold, a mold cavity of the bending mold after combination is right circular, and the diameter D2 of the mold cavity is equal to the external diameter D of the final elbow pipe fitting. The hot-press forming mold for the thick-wall elbow pipe fitting with the straight pipe section does not need a ship-shaped internal core and a choke plug, so that the machining and manufacture of the thick-wall elbow pipe fitting with the straight pipe section can be realized.

Description

The heat pressing and molding mold of band straight length thick-wall elbow pipe fitting

Technical field

The utility model relates to pipe fitting production equipment field, especially produces the mould of bend pipe tools.

Background technology

Pipe fitting is the connector of pipeline.The thick-wall elbow pipe fitting refers to the bend pipe tools product of wall thickness more than 16mm, generally comes moulding with the technology of hot pressing die moulding.As shown in Figure 1, earlier carry out the pipe blanking according to the Related product size, then pipe is heated regular hour and temperature in electric furnace, then pipe is placed progressive die tool counterdie 5, ship shape inner core 3 and two port plugs 4 are put into pipe, upper mould 1 begins down that matched moulds is pressed, and takes out bend pipe tools 2 after the moulding, takes out plug 4 and ship shape inner core 3 in the bend pipe tools 2 at last.This mould and production method generally are used to make the bend pipe tools product of not being with straight length, but for the bend pipe tools two ends band straight length product of long straight length especially, after adopting this mode moulding, inner ship shape inner core can be blocked by straight length, can't take out.

The utility model content

The applicant provides a kind of heat pressing and molding mold that does not have the band straight length thick-wall elbow pipe fitting of inner core, easily moulding band straight length thick-wall elbow pipe fitting at the shortcoming that above-mentioned band straight length thick-wall elbow pipe fitting can't adopt existing mold to produce.

The technical scheme that the utility model adopted is as follows:

A kind of heat pressing and molding mold with straight length thick-wall elbow pipe fitting, comprise precompressed mould and bending mould, the precompressed mould is made up of precompressed patrix and precompressed counterdie, and the die cavity behind its matched moulds is oval, and the pass of the diameter D0 of the length D1 of its major axis and pipe is: D1=D0+ (5%～7%) * D0; Bending mould is made up of crooked patrix and crooked counterdie, and the die cavity behind its matched moulds is for just round, and its diameter D2 is identical with the outer diameter D of final elbow pipe fitting.

The utility model does not need ship shape inner core and plug, can realize the processing and manufacturing with straight length thick-wall elbow pipe fitting.

Description of drawings

Fig. 1 is existing thick-wall elbow pipe fitting mold production status schematic diagram;

Fig. 2 is a precompressed mold work schematic diagram of the present utility model, the state before precompressed;

The same Fig. 2 of Fig. 3 is the state after the precompressed;

Fig. 4 is a bending mould work schematic diagram of the present utility model, the state before compacting;

The same Fig. 4 of Fig. 5 is the compacting completion status;

Fig. 6 is the schematic perspective view of Fig. 4.

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described.

The heat pressing and molding mold of band straight length thick-wall elbow pipe fitting described in the utility model comprises precompressed mould and bending mould.As Fig. 2, shown in Figure 3, the precompressed mould is made up of precompressed patrix 6 and precompressed counterdie 8, and the die cavity behind its matched moulds is oval, and the pass of the diameter D0 of the length D1 of its major axis and pipe 7 is: D1=D0+ (5%～7%) * D0.As Fig. 4, shown in Figure 5, bending mould is made up of with crooked counterdie 11 crooked patrix 10, and the die cavity behind its matched moulds is for just round, and its diameter D2 is identical with the outer diameter D of final products.

In the actual production process, earlier carry out the blanking of pipe 7 according to product size, then pipe 7 is heated the regular hour in electric furnace under uniform temperature, then pipe 7 is placed the precompressed counterdie 8 of precompressed mould, see Fig. 2, precompressed patrix 6 is descending to be flattened pipe 7, is pressed into pipe 9 in the middle of as shown in Figure 3 oval; As shown in Figure 4, pipe 9 in the middle of oval is put into the crooked counterdie 11 of bending mould, long axis direction places vertical direction, and crooked patrix 10 is descending to carry out brake forming to pipe 9, is shaped to as Fig. 5, final elbow pipe fitting 12 shown in Figure 6.

More than describing is to explanation of the present utility model, it or not qualification to utility model, the utility model institute restricted portion is referring to claim, under the situation of spirit of the present utility model, the utility model can be done any type of modification, and for example direct pre-molding pipe 9 on forcing press so can be saved a cover precompressed mould, but the cross section of pipe 9 is not very desirable, can influence follow-up crooked end product quality.

Claims

1. heat pressing and molding mold with straight length thick-wall elbow pipe fitting, it is characterized in that: comprise precompressed mould and bending mould, the precompressed mould is made up of precompressed patrix and precompressed counterdie, die cavity behind its matched moulds is oval, and the pass of the diameter D0 of the length D1 of its major axis and pipe is: D1=D0+ (5%～7%) * D0; Bending mould is made up of crooked patrix and crooked counterdie, and the die cavity behind its matched moulds is for just round, and its diameter D2 is identical with the outer diameter D of final elbow pipe fitting.