CN212310464U

CN212310464U - Forming device for cold extruding multi-hole small-caliber branch pipe orifice on thick-wall large-caliber pipe fitting

Info

Publication number: CN212310464U
Application number: CN202021076554.7U
Authority: CN
Inventors: 黄兴友; 王槐春; 梅莹; 谢飞
Original assignee: Jiangsu New Hengji Special Equipment Co Ltd
Current assignee: Jiangsu New Hengji Special Equipment Co Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-01-08
Anticipated expiration: 2030-06-12

Abstract

The utility model provides a cold extrusion porous small-bore mouth of pipe forming device on thick wall heavy-calibre pipe fitting, its characterized in that includes mould (1), lower mould (2), support (3) and cushion (4), goes up mould (1) and links to each other with last press (6) to withstand the raw materials pipe from the upper portion of raw materials pipe (5), the lower part supporting of raw materials pipe (5) is on cushion (4), is equipped with porous blind hole (7) that are used for the branch pipe shaping on last mould (1) and lower mould (2) relative one side, lower mould (2) arrange to be fixed on support (3), every lower mould (2) all are equipped with drift (8) that match with the branch pipe appearance, the lower part supporting of support (3) is on jacking piece (9), and jacking piece (9) are installed on press (10). The utility model discloses can effectively solve the seamless shaping problem of the small-bore mouth of pipe of shaping porous on the wall heavy-calibre pipe fitting.

Description

Forming device for cold extruding multi-hole small-caliber branch pipe orifice on thick-wall large-caliber pipe fitting

Technical Field

The utility model relates to a forming technology, especially a forming technology who is responsible for branch pipe on, specifically speaking are the orificial forming device of cold extrusion porous small-bore branch on the heavy-calibre pipe fitting of thick wall heavy-calibre, the product that goes out through this forming device punching press has very high integrity, security and reliability, makes its performance satisfy the operation requirement of product to guarantee that the reliability level of key equipment reaches the qualitative and quantitative technical requirement of specified reliability, improve production efficiency simultaneously, reduction in production cost. The product is widely applied to the fields of nuclear power, petrochemical industry and the like.

Background

The manufacturing process of the multi-hole small-caliber branch pipe orifice on the thick-wall large-caliber pipe fitting in the industry at present comprises the following steps: welding, machining, hot drawing, etc. Various forming methods have advantages and disadvantages, the machining cost is high, the working period is long, and the hot-drawing forming effect generally cannot meet the requirement of product size precision, so that the design of a cold extrusion pipe orifice forming method is urgent. For products with a multi-hole small-caliber branch pipe opening formed on a thick-wall large-caliber pipe fitting, the traditional manufacturing process except welding forming cannot effectively solve the problem of forming cracking. But the welding seam of the welded product causes the mechanical property, the structural shape and the microstructure of the welded joint and the pipe fitting parent metal to be discontinuous, and meanwhile, the welding defect is inevitable, which seriously influences the safe and reliable operation of the product.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the forming of the multi-hole small-caliber branch pipe on the existing thick-wall large-caliber pipe fitting has low efficiency or poor forming quality, and designing a forming device for cold extruding the multi-hole small-caliber branch pipe on the thick-wall large-caliber pipe fitting.

The technical scheme of the utility model is that:

a forming device for cold extruding a multi-hole small-caliber branch pipe opening on a thick-wall large-caliber pipe fitting is characterized by comprising an upper die 1, a lower die 2, a support 3 and a cushion block 4, wherein the upper die 1 is connected with an upper press 6 and props against a raw material pipe from the upper part of the raw material pipe 5, the lower part of the raw material pipe 5 is supported on the cushion block 4, a plurality of blind holes 7 for branch pipe forming are formed in the surface, opposite to the upper die 1 and the lower die 2, of the upper die 1, the lower die 2 are arranged and fixed on the support 3, each lower die 2 is provided with a punch 8 matched with the shape of a branch pipe, the lower part of the support 3 is supported on a jacking piece 9, and the jacking.

The jacking piece 9 is a jack.

And positioning holes 11 are formed at two ends of the upper die 1.

The lower die 2 is provided with grooves 12 which are equal to the branch pipes in number and are used for fixing the punches 8.

The utility model belongs to the key spare part in the key equipment of project carries out the implementation of normalized reliability design and reliability work project according to the requirement of customer and standard to guarantee that the reliability level of key equipment reaches the qualitative and quantitative technical requirement of specified reliability. Aiming at the problems that the traditional manufacturing process and welding forming can not effectively solve the forming cracking and welding defects and the like, the device for forming the multi-hole small-caliber branch pipe orifice on the thick-wall large-caliber pipe fitting is designed, which is safe, reliable, accurate and effective in forming and qualified in performance, two technical innovation points are reasonably implemented in the process, the size of the product is ensured to meet the size precision requirement of the product, the performance of the product is ensured to meet the use requirement of the product, and the long-term safe and reliable operation of equipment is ensured.

The utility model has the advantages that:

the utility model discloses an effectual problem of having solved the shaping fracture to and weld forming causes welded joint and pipe fitting mother metal to have mechanical properties discontinuous, structural type form discontinuous, the microstructure is discontinuous and other welding defect's problem, and special innovation traditional handicraft rationally implements the innovation point in manufacturing procedure. The reliability of product production is greatly improved, the production benefit of the product is improved, the production efficiency is improved, and the production cost is reduced.

The utility model discloses simple structure, production efficiency is high, and is with low costs, of high quality.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the installation of the present invention on the molding apparatus.

Fig. 3 is the intention of the working state of the present invention.

Fig. 4 is a schematic view of the upper die structure of the present invention.

Fig. 5 is a schematic view of the lower mold structure of the present invention.

Fig. 6 is a schematic view of the forming process of the pipe orifice of the present invention.

Fig. 7 is a schematic view of the forming process of the pipe fitting of the present invention.

Detailed Description

The invention will be further described with reference to the following description and specific embodiments.

As shown in fig. 1-7.

A forming device for cold extruding a multi-hole small-caliber branch pipe orifice on a thick-wall large-caliber pipe fitting is shown in figure 1 and comprises an upper die 1, a lower die 2, a support 3 and a cushion block 4, wherein positioning holes 11 are formed in two ends of the upper die 1, and the forming device is shown in figure 4. The upper die 1 is connected with an upper press 6, and supports against the raw material pipe from the upper part of the raw material pipe 5, the lower part of the raw material pipe 5 is supported on a cushion block 4, a porous blind hole 7 for branch pipe forming is arranged on one surface of the upper die 1 opposite to the lower die 2, the lower die 2 is arranged and fixed on a bracket 3, and as shown in figure 4, grooves 12 which are equal to the number of the branch pipes and are used for fixing punches 8 are arranged on the lower die 2. Each lower die 2 is provided with a punch 8 matched with the shape of the branch pipe, the lower part of the bracket 3 is supported on a jacking piece 9 (a fixed block or a jack can be adopted), and the jacking piece 9 is arranged on a lower press 10, as shown in figure 5.

The utility model discloses a forming die includes mould 1, lower mould 2, top 8, cushion 4, fixed orifices 11. The upper die 1 is distributed with branch pipe holes, the size of each branch pipe hole is consistent with the outline size of a branch pipe preformed on the pipeline, and the distance between every two branch pipe holes is consistent with the distance between every two branch pipes preformed on the pipeline, as shown in fig. 3; grooves 12 for fixing the plug 8 are processed on the lower die 2, and the distance between the grooves 12 is consistent with that between the branch pipe holes, as shown in fig. 5.

The key of the forming process is that the ejector 8 is placed on a specific groove 12 of the lower die 2, then the lower die 2 is placed on the cushion block 4, the upper die 1 is fixed on hydraulic equipment, then a round bar is inserted into a positioning hole 13 of the upper die 1, a raw material straight pipe and the lower die 2, and the forming of a branch pipe opening is realized by moving the lower die 2 upwards as shown in figure 3. During which the die of the punch 8 is replaced a number of times, as shown in figure 6. And (4) carrying out heat treatment on the semi-finished product after each deformation is finished, as shown in figure 7, until the product requirement is met.

The technical difficulty of molding is as follows:

for the molding of the multi-hole small-caliber branch pipe orifice on the thick-wall large-caliber pipe fitting, the following difficulties are generally existed:

A. when the workpiece is in a stretching deformation state, the workpiece can be broken when the deformation rate exceeds the elongation rate of the workpiece material;

B. deformation of the material produces deformation strengthening. Different materials have different deformation strengthening effects, and when the deformation strengthening exceeds a certain degree, the materials can crack or even brittle fracture when acting force is continuously applied;

C. the branch pipe openings are small in distance and dense in arrangement, interaction force exists between the holes, and when deviation is applied to acting force, the branch pipe openings are poor in forming effect, insufficient in roundness and uneven in arrangement.

And (3) heat treatment of molding:

as shown in fig. 7, in order to prevent cracking and the like from occurring during the manufacturing process, a process of cold extrusion-heat treatment-cold extrusion should be adopted in the molding process. The standard heat treatment method is solution heat treatment.

The utility model discloses the part that does not relate to is the same with prior art or can adopt prior art to realize.

Claims

1. The utility model provides a cold extrusion porous small-bore mouth of pipe forming device on thick wall heavy-calibre pipe fitting, its characterized in that includes mould (1), lower mould (2), support (3) and cushion (4), goes up mould (1) and links to each other with last press (6) to withstand the raw materials pipe from the upper portion of raw materials pipe (5), the lower part supporting of raw materials pipe (5) is on cushion (4), is equipped with porous blind hole (7) that are used for the branch pipe shaping on last mould (1) and lower mould (2) relative one side, lower mould (2) arrange to be fixed on support (3), every lower mould (2) all are equipped with drift (8) that match with the branch pipe appearance, the lower part supporting of support (3) is on jacking piece (9), and jacking piece (9) are installed on press (10).

2. A forming device for cold-extruding a multi-hole small-caliber branch pipe orifice on a thick-wall large-caliber pipe fitting according to claim 1, wherein the jacking piece (9) is a jack.

3. The forming device for cold extruding the multi-hole small-caliber branch pipe orifice on the thick-wall large-caliber pipe fitting according to the claim 1, characterized in that the two ends of the upper die (1) are provided with positioning holes (11).

4. The forming device for cold extruding the multi-hole small-caliber branch pipe orifice on the thick-wall large-caliber pipe fitting according to the claim 1, characterized in that the lower die (2) is provided with grooves (12) which are equal to the number of the branch pipes and are used for fixing the punch heads (8).