CN217858065U

CN217858065U - Tool for cold drawing of pipe with flange

Info

Publication number: CN217858065U
Application number: CN202221389755.1U
Authority: CN
Inventors: 王姝俨; 刘强; 许开春; 白倩倩; 吴道祥; 曾庆华; 王平
Original assignee: Southwest Aluminum Group Co Ltd
Current assignee: Southwest Aluminum Group Co Ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-11-22
Anticipated expiration: 2032-06-06

Abstract

The application discloses frock for taking flange pipe cold drawing, including two plug, two sets of anchor clamps tailstocks and two sets of cover that press from both sides, wherein, two the plug is used for inserting the inside of taking flange pipe respectively from both ends when cold drawing and is supported by the centre gripping position with following inside, the hole shape and the flange shape phase-match that press from both sides the cover and be used for the cover to establish the both ends outside of taking flange pipe, the anchor clamps tailstock be used for connecting cold drawing equipment with press from both sides the cover. Above-mentioned a frock for taking flange pipe cold drawing can avoid cold drawing deformation direct action to lead to the ring flange to warp at the ring flange, on guaranteeing the controllable basis of tubular product size, realizes the orthopedic and the subduction of residual stress of product.

Description

Tool for cold drawing of pipe with flange

Technical Field

The utility model relates to a forging apparatus technical field, more specifically say, relate to a frock for taking flange tubular product cold drawing.

Background

The aluminum alloy tubular product has a flange structure, and has higher requirements on the size of the flange structure. The aluminum alloy pipe has serious deformation after quenching, and the machining deformation of the pipe directly processed is uncontrollable. The conventional aluminum alloy thin-wall pipe generally does not have a flange structure, and the two ends of the pipe are clamped by a general stretching clamp for cold stretching, so that the shape correction and the residual stress reduction of the pipe are realized. However, after the cold deformation is carried out by adopting the method, because the cold stretching force is huge, the clamping parts at the two ends of the pipe generate serious deformation, but the method is not suitable for the pipe with the flange, and if a clamping tool is not adopted, the clamping area including the flange on the product generates serious deformation.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a frock for taking flange pipe cold drawing can avoid cold drawing deformation direct action to lead to the ring flange to warp in the ring flange, on guaranteeing the controllable basis of tubular product size, realizes orthopedic and residual stress's of product subducting.

The utility model provides a pair of a frock for taking flange tubular product cold drawing, including two plug, two sets of anchor clamps tailstocks and two sets of cover that press from both sides, wherein, two the plug is used for inserting the inside of taking flange tubular product from both ends respectively when cold drawing and is supported by the centre gripping position with following inside, the hole shape that presss from both sides the cover just is used for the cover to establish with flange shape phase-match and is outside at the both ends of taking flange tubular product, the anchor clamps tailstock be used for connecting cold drawing equipment with press from both sides the cover.

Preferably, in the tool for cold drawing a flanged pipe, the inner hole of the jacket has a shape in which the diameter is gradually enlarged from the center of the pipe to the end thereof.

Preferably, in the tool for cold drawing of the flanged pipe, when the upper jacket and the lower jacket of each set of jackets are sleeved outside two ends of the flanged pipe, the distance between the opposite surfaces of the upper jacket and the lower jacket is 3mm to 5mm.

Preferably, in the tool for cold drawing a flanged pipe described above, a diameter of the first end portion of the mandrel exposed to the outside after being inserted into the flanged pipe is larger than an inner diameter of the flanged pipe.

Preferably, in the tool for cold drawing a flanged pipe described above, a diameter of the first end portion of the mandrel exposed to the outside after being inserted into the flanged pipe is 30mm to 50mm larger than an inner diameter of the flanged pipe.

Preferably, in the tool for cold drawing the flanged pipe, a diameter of the middle portion of the mandrel is 0.5mm to 2mm smaller than an inner diameter of the flanged pipe.

Preferably, in the tooling for cold drawing of the flanged pipe, the second end of the mandrel inserted into the flanged pipe has a chamfer part tapered inwards.

According to the above technical scheme, the utility model provides an above-mentioned frock that is used for flange pipe cold drawing owing to include two plug, two sets of anchor clamps tailstocks and two sets of cover that press from both sides, wherein, two the plug is used for inserting the inside of flange pipe from both ends respectively when cold drawing and is supported by the centre gripping position with following inside, the hole shape and the flange shape phase-match that press from both sides the cover just are used for the cover to establish at the both ends of flange pipe outside, the anchor clamps tailstock be used for connecting cold drawing equipment with press from both sides the cover, consequently can avoid cold drawing to warp direct action in the ring flange and lead to the ring flange to warp, on the controllable basis of assurance tubular product size, realize the orthopedic of product and the subduction of residual stress.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic view of an embodiment of a tool for cold drawing a flanged pipe according to the present invention;

FIG. 2 is a schematic cross-sectional view of a flanged pipe;

fig. 3 is a sectional view of the tool for cold drawing the flanged pipe in a working state.

Detailed Description

The utility model discloses a core provides a frock for taking flange pipe cold drawing, can avoid cold drawing deformation direct action to lead to the ring flange to warp in the ring flange, on guaranteeing the controllable basis of tubular product size, realizes orthopedic and the subduction of residual stress of product.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a pair of an embodiment for taking flange tubular product cold drawing's frock is shown in figure 1, figure 1 is the utility model provides a pair of a schematic diagram that is used for taking flange tubular product cold drawing's frock's embodiment, this frock includes two plug 4, two sets of anchor clamps tailstock 2 and two sets of cover 3 that press from both sides, wherein, two plug 4 are used for inserting the inside of taking flange tubular product 1 from both ends respectively when cold drawing with from inside support by the centre gripping position, the hole shape that presss from both sides cover 3 and flange shape phase-match just are used for the cover to establish outside at the both ends of taking flange tubular product 1, anchor clamps tailstock 2 is used for connecting cold drawing equipment and presss from both sides cover 3.

It should be noted that, the cross section of the flanged pipe is shown in fig. 2, fig. 2 is a schematic cross section of the flanged pipe, both ends of the flanged pipe are shown to have flanges, the middle part of the flanged pipe is thinner, the mandrel 4 is used here to prevent the clamped part of the flanged pipe from being flattened, before cold deformation, the fixture tailstock 2 is installed on the stretching device, the flanged pipe 1 is placed on the stretching device, the mandrel 4 is inserted into both ends of the flanged pipe, then the device is adjusted to completely match the cold stretching tool with the flanged pipe 1, finally cold stretching is performed, as the cold stretching is performed, the diameter of the flanged pipe 1 is gradually reduced, and when the axial length of the product reaches 2222mm to 2233mm, that is, the cold stretching amount is in the range of 1% -1.5%, the cold stretching can be stopped.

According to the above technical scheme, the utility model provides an in the embodiment of the above-mentioned frock that is used for taking flange tubular product cold drawing, owing to include two plug, two sets of anchor clamps tailstock and two sets of cover that press from both sides, wherein, two plug are used for inserting the inside of taking flange tubular product from both ends respectively when cold drawing and are supported by the centre gripping position with following inside, the hole shape and the flange shape phase-match that press from both sides the cover and be used for the cover to establish at the both ends of taking flange tubular product outside, the anchor clamps tailstock is used for connecting cold drawing equipment and presss from both sides the cover, consequently, can avoid cold drawing deformation direct action in the ring flange to lead to the ring flange to warp, on the controllable basis of assurance tubular product size, realize the orthopedic of product and residual stress's subduction.

In one embodiment of the tooling for cold drawing of flanged pipes, referring to fig. 3, fig. 3 is a sectional view of the tooling for cold drawing of flanged pipes in an operating state, wherein a partial enlarged view is provided, and the inner hole of the jacket 3 is shaped to have a diameter gradually expanding along the center of the pipe towards the end, that is, in the partial enlarged view of fig. 3, the inner hole of the jacket 3 is gradually enlarged from left to right. Under the condition, the upper end of the inner hole of the jacket is in gradual contact with the forging in the forming process, and the cold stretching force can be gradually distributed in the transition area between the axial direction of the forging and the flange plate, so that the deformation of the flange plate caused by the overlarge cold stretching force is prevented.

In another specific embodiment of the tool for cold drawing of the flanged pipe, when the upper jacket and the lower jacket of each group of jackets are sleeved outside the two ends of the flanged pipe, the distance between the opposite surfaces of the upper jacket and the lower jacket is 3mm to 5mm, so that the forged piece can be fully wrapped, and the molding quality of a product is protected. Of course, other distances may be selected according to actual needs, and are not limited herein.

In still another embodiment of the above tool for cold drawing a flanged pipe, the diameter of the first end portion of the mandrel 4 exposed to the outside after being inserted into the flanged pipe 1 is larger than the inner diameter of the flanged pipe 1, and in a further preferred embodiment, the diameter of the first end portion of the mandrel 4 exposed to the outside after being inserted into the flanged pipe 1 is 30mm to 50mm larger than the inner diameter of the flanged pipe 1, which can prevent the mandrel 4 from falling into the inner bore of the flanged pipe 1.

In a preferred embodiment of the above tool for cold drawing a flanged pipe, the diameter of the middle part of the mandrel 4 may be 0.5mm to 2mm smaller than the inner diameter of the flanged pipe, so as to ensure that the mandrel is smoothly placed into the inner hole of the flanged pipe 1. Furthermore, the second end of the mandrel 4 inserted into the flanged pipe 1 has a chamfer part tapering inward, which further ensures that the mandrel 4 is smoothly inserted into the inner hole of the flanged pipe 1, and these dimensions and chamfer shapes and dimensions can be selected according to actual needs, which is not limited herein.

In conclusion, the tool for cold drawing of the pipe with the flange provided by the application can be matched with drawing equipment to complete the cold drawing process of the pipe with the flange, the thin wall, the long cylinder and the flange, is simple in structure, can realize cold drawing of products with different specifications by replacing the jacket and the core rod, and realizes shape correction and residual stress reduction of the products on the basis of ensuring controllable pipe size.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The tool for cold drawing of the flanged pipe is characterized by comprising two core rods, two clamp tailstocks and two clamp sleeves, wherein the two core rods are used for being inserted into the flanged pipe from two ends respectively to support clamped positions from the inside during cold drawing, the shape of an inner hole of each clamp sleeve is matched with that of a flange and used for being sleeved outside the two ends of the flanged pipe, and the clamp tailstocks are used for connecting cold drawing equipment with the clamp sleeves.

2. The tool for cold drawing the flanged pipe according to claim 1, wherein the inner hole of the jacket is shaped to have a diameter gradually expanding from the center of the pipe to the end of the pipe.

3. The tool for cold drawing of the flanged pipe according to claim 1, wherein when the upper jacket and the lower jacket of each set of jackets are sleeved outside the two ends of the flanged pipe, the distance between the opposite surfaces of the upper jacket and the lower jacket is 3mm to 5mm.

4. The tooling for cold drawing flanged pipe according to claim 1, wherein the diameter of the first end of the mandrel exposed after insertion inside the flanged pipe is greater than the inside diameter of the flanged pipe.

5. The tool for cold drawing a flanged pipe according to claim 4, wherein the diameter of the first end of the mandrel exposed after insertion into the flanged pipe is 30mm to 50mm greater than the inner diameter of the flanged pipe.

6. The tooling for cold drawing flanged pipes according to claim 1, wherein the diameter of the middle part of the mandrel is 0.5mm to 2mm smaller than the inner diameter of the flanged pipe.

7. The tooling for cold drawing flanged pipes according to claim 6, wherein the second end of the mandrel inserted into the flanged pipe has a chamfered portion that tapers inwardly.