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Production method of hollow open rod piece

A production method and rod technology are applied in the production field of hollow open rods, which can solve the problems of low product dimensional accuracy, small product specification range, and few types of straight-sided hollow open rods, etc. The effect of small deformation and small internal stress

Inactive Publication Date: 2020-12-22
苏州正赞轨道交通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing straight-sided hollow open rods have problems such as few types, small product specification range, and low product dimensional accuracy, which cannot meet the needs of aerospace, instrumentation, mechanical equipment and other fields.
At the same time, the existing production methods of hollow open rods cannot meet the needs of product size and performance

Method used

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  • Production method of hollow open rod piece
  • Production method of hollow open rod piece
  • Production method of hollow open rod piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this embodiment, a stainless steel coil with a diameter of 1200 mm and a width of 1040 mm is used as a raw material to produce a finished rod with a hollow opening with a straight side axially and internal teeth. The cross-section of the bar is rectangular, with a width of 30mm, a height of 20mm, a thickness of 2.6mm, a hook width of 8mm, and a hook thickness of 4.5mm. The material is 316L stainless steel.

[0045] like figure 1 Shown, be the production method of hollow opening bar in the present embodiment, this method comprises the following steps:

[0046] S10. Heating the unfolded top corner of the finished rod on the steel plate, rolling a pre-top corner at the top corner after heating, and flattening the end to form a semi-finished plate with a pre-top corner. like Figure 4 shown.

[0047] Specifically, online flames are used to heat the thickening platform and the corners corresponding to the unfolded finished rods. The thickening platform is heated in bot...

Embodiment 2

[0060] In this embodiment, a narrow strip steel coil with a cross-sectional size of 160 mm×3 mm is used as a raw material to produce a finished bar with a single-toothed hollow opening in a straight shape and an axial direction. The cross section of the bar is square, the side length is 40mm, the thickness is 2.8mm, the hook width is 10mm, and the material is Q235B.

[0061] like figure 1 Shown, be the production method of hollow opening bar in the present embodiment, this method comprises the following steps:

[0062] S10. Heating the unfolded top corner of the finished rod on the steel plate, rolling a pre-top corner at the top corner after heating, and flattening the end to form a semi-finished plate with a pre-top corner.

[0063] Specifically, flames are used to heat the plate widths of 20mm, 60mm, 120mm, and 160mm on-line at a heating temperature of 900°, and non-heating parts are provided with heat insulating materials to prevent the expansion of the heating area.

[...

Embodiment 3

[0075] In this embodiment, steel strips with a width of 108 mm, a thickness of 3 mm, and a length of 6 m are used as raw materials to produce arc-shaped axially single-toothed finished rods. The cross-section of the bar is circular, the radius of the circle is 20mm, and the thickness is 2.0mm. The inner surface of the hook is dovetail-shaped, the width is 9mm, the dovetail angle is 60 degrees, and the material is Q355B.

[0076] like Figure 7 Shown, be the production method of hollow opening bar in the present embodiment, this method comprises the following steps:

[0077] S10, rolling out upturned parts on both sides of the steel plate to form a warped side plate.

[0078] Also include steps before step S10:

[0079] The steel plate is made to be the same width and thickness as the finished bar when unfolded.

[0080] Specifically, a narrow strip steel plate with a width of 108 mm, a thickness of 3 mm, and a length of 6 m is sent to a four-roll universal cold rolling mill...

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Abstract

The invention discloses a production method of a hollow open rod piece. The production method comprises the following steps that the unfolded vertex angle position of a finished rod piece on a steel plate is heated, a pre-vertex angle is rolled at the vertex angle position after heating, and meanwhile, the end part is flattened to form a semi-finished plate with the pre-vertex angle; and the pre-vertex angle position is heated, and the pre-vertex angle is bent, and the polygonal hollow open rod piece is formed. According to the production method of the hollow open rod piece, the product size precision is improved by 5-10 times, and the body thickness tolerance is reduced to + / -0.05mm from + / -0.5mm. According to the production method of the hollow open rod piece, the width range of a product is expanded from 30-72mm to 8-120mm; the height range of the product is expanded from 20-48mm to 5-80mm; and the thickness range of the product is expanded from 2.6-8mm to 0.5-12mm. Products produced by the method have more varieties, and the application range is expanded from high-speed rails, subways, pipe galleries and glass curtain walls to more fields such as machinery, aerospace and prefabricated buildings. According to the production method of the hollow open rod piece, vertex angle deformation of steel plates in the bending process is small, and internal stress is small.

Description

technical field [0001] The invention relates to the technical field of metal forming, in particular to a production method of a hollow open rod. Background technique [0002] In order to meet the needs of my country's high-speed rail, subway, underground pipe gallery, glass curtain wall and other fields, a representative product of a straight-sided axial hollow opening rod with internal teeth --- embedded channel steel came into being. The cross-sectional characteristics of this product Yes: it is semi-closed square, C-shaped, V-shaped or U-shaped, the radius of the inner and outer fillets is very small, usually 0.5-1.5mm, the semi-closed hook is thickened and the inner side is provided with a horizontal or dovetail platform; the characteristics of use are: It is hung or pre-buried on the concrete surface and is used to connect equipment installation brackets or pipelines. When connecting, insert the T-shaped head of the T-shaped fastening bolt into the semi-closed groove and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 罗光政黄华罗显龙周铁城张峻巍赵妍高文杰孙晓帆袁立东朱文楠
Owner 苏州正赞轨道交通科技有限公司