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Production method of lifting rod for automobile trunk

A production method and lift rod technology, which are applied in the control mechanism of wing sash, door/window fittings, construction, etc., can solve problems such as reducing hardness, and achieve the effect of reducing hardness, good anti-oxidation performance, and improving performance

Inactive Publication Date: 2017-10-27
东莞市华钢精密钢管零部件制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned problems existing in the prior art, the object of the present invention is to provide a production method of the lifting rod for the trunk of an automobile. Through continuous annealing and temperature control, the carbides can be fully dissolved and uniformly diffused, so that the hardness of the steel pipe is higher. Uniform, the hardness of the weld seam and the base metal becomes uniform; it also reduces the hardness, eliminates the stress, and quenches and tempers; it also eliminates the time-effect strain, thereby solving the problem of deformation due to time changes; through two cold drawing processes, the steel pipe is improved Dimensional accuracy and surface smoothness ensure the quality of finished steel pipes; strong adaptability, and eliminate fine cracks on the surface of steel pipes, with good oxidation resistance, high tensile strength and yield strength, and improved corrosion resistance, friction resistance and surface smoothness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A production method of a lifting rod for an automobile trunk, said production method comprising the steps of:

[0038] (1) Cutting and preparing materials: calculate materials according to different pipe diameters, mark lines, cut carbon steel by plasma method, and process grooves for standby;

[0039] (2) Shear butt welding: splice the cut spare parts, and use an inert gas protection pad and an automatic TIG welding machine to butt weld in the process of argon tracking protection;

[0040] (3) Rolling steel pipes: Send the butt-welded steel plates to the DQZ001 forming unit reformed by a three-roll plate rolling machine, and roll them into steel pipes of the required size;

[0041] (4) High-frequency welding: Send the rolled steel pipe into the welded pipe forming machine, and use a high-frequency welding machine to weld the joints of the rolled steel pipe under the protection of inert gas;

[0042] (5) Eddy current flaw detection: use point coils to conduct eddy curr...

Embodiment 2

[0059] The difference from Example 1 is that the temperature range of the first preheating stage in the first annealing step (8) is 400°C, and the time is 2 minutes; the temperature range of the first high temperature annealing stage is 500°C, and the time is 4 minutes; The temperature range of the stage is 350°C, and the time is 10 minutes; the temperature range of the second zone of the first heat preservation is 100°C, and the time is 15 minutes;

[0060] Step (12) In the second annealing, the temperature range of the second preheating stage is 450°C, and the time is 2 minutes; the temperature range of the second high temperature annealing stage is 550°C, and the time is 4 minutes; the temperature range of the second heat preservation stage is 400°C °C, the time is 10 minutes; the temperature range in the second zone of the second heat preservation stage is 150 °C, and the time is 15 minutes.

Embodiment 3

[0062] The difference from Example 1 is that the temperature range of the first preheating stage in the first annealing step (8) is 500°C, and the time is 3 minutes; the temperature range of the first high temperature annealing stage is 600°C, and the time is 6 minutes; The temperature range of the stage is 450°C, and the time is 10 minutes; the temperature range of the first heat preservation stage is 350°C, and the time is 15 minutes;

[0063] Step (12) In the second annealing, the temperature range of the second preheating stage is 550°C, and the time is 3 minutes; the temperature range of the second high temperature annealing stage is 650°C, and the time is 6 minutes; the temperature range of the second heat preservation stage is 500°C °C, the time is 12 minutes; the temperature range in the second zone of the second heat preservation stage is 400 °C, and the time is 15 minutes.

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PUM

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Abstract

The invention discloses a production method of a lifting rod for an automobile trunk. Through the steps of clipping and material preparation, cutting and butt welding, steel pipe rolling, high-frequency welding, eddy current inspection, weld joint rubbing-down, sizing and shaping, primary annealing, primary pickling and phosphating, head beating, primary cold drawing, secondary annealing, secondary pickling and phosphating, secondary cold drawing, cutting, inner and outer pipe machining and the like, the hardness of steel pipe weld joints and the hardness of base metal are uniform, internal stress and aging strain are eliminated, the strength and toughness of steel pipes are improved, and therefore the problem of deformation caused by the time change is solved. Through the two cold-drawing processes, the dimensional precision and the surface smoothness of the steel pipes are improved, the quality of finished products of the steel pipes is guaranteed, fine cracks on the surfaces of the steel pipes are removed, the advantages of being good in oxidation resistance and high in tensile strength and yield strength are achieved, and corrosion resistance, friction resistance and surface smoothness are improved.

Description

technical field [0001] The invention relates to the technical field of lifting devices, in particular to a production method of a lifting rod for an automobile trunk. Background technique [0002] The car trunk is a box set at the rear of the car for storing items, which is widely used in various small cars; the existing car trunk includes a box body and a box cover, and one end of the box cover is fixed by a rotating shaft On the box body, the other end cooperates with the box body through a connecting buckle. In the prior art, the lifting rod of the electric tailgate of automobiles is generally made of aluminum tubes, and there are the following problems in the process of use: [0003] (1) Lifting rods for automobile trunks made of aluminum tubes have low strength and are prone to deformation after long-term use; [0004] (2) The lift rod for the trunk of a car made of aluminum tubes has serious friction loss under the condition of long-term use, which seriously affects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00E05F15/00
Inventor 姚祖华
Owner 东莞市华钢精密钢管零部件制造有限公司