Production and processing technology of super wide-thickness ratio rectangular wire for automobile spring

A technology of automotive springs and processing technology, which is applied in the directions of vehicle parts, metal rolling, transportation and packaging, etc. It can solve the problems of uneven wear around the mold, insufficient filling of rounded corners around the mold, and low life of the mold, achieving good market prospects, Good flatness and excellent shape

Active Publication Date: 2019-06-28
DONGGUAN KELEE STEEL WIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a production and processing technology for rectangular wires with ultra-width-thickness ratios for automobile springs, which can effectively solve the problem of filling the surrounding rounded corners when forming the existing rectangular steel wires. Dissatisfaction and uneven wear around the mold lead to low mold life

Method used

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  • Production and processing technology of super wide-thickness ratio rectangular wire for automobile spring
  • Production and processing technology of super wide-thickness ratio rectangular wire for automobile spring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Drawing: drawing the round wire into a square wire.

[0029] (2) Annealing: Using the isothermal recrystallization annealing process, place the square wire rod in a heat treatment furnace, fill the heat treatment furnace with inert gas, then raise the temperature in the furnace to 690 ° C, and keep it for 3 hours; then, at 13 ° C / Cool down to 620°C at a cooling rate of h, and keep it warm for 1.6h, and then return to normal temperature at a cooling rate of 19°C / h; the inert gas is methanol, and the flow rate of methanol gas is 2L / min.

[0030] (3) Cold rolling: use a cold rolling mill to cold-roll square wires to form rectangular wires. Tension rolling is used in cold rolling. The cold rolling mill frame is a closed frame. The upper part of the frame is connected by an upper beam, and the lower part is The roll changing track is connected, the work roll and the back-up roll are in the frame window, the push-up cylinder is installed at the lower part of the frame w...

Embodiment 2

[0032] (1) Drawing: drawing the round wire into a square wire.

[0033] (2) Annealing: Using the isothermal recrystallization annealing process, place the square wire rod in a heat treatment furnace, fill the heat treatment furnace with inert gas, then raise the temperature in the furnace to 700 ° C, and keep it for 2.5 hours; then, at 10 ° C Cool to 610°C at a cooling rate of 18°C / h and keep warm for 1.5h, then return to normal temperature at a cooling rate of 18°C / h; the inert gas is methanol, and the flow rate of methanol gas is 2L / min.

[0034] (3) Cold rolling: use a cold rolling mill to cold-roll square wires to form rectangular wires. Tension rolling is used in cold rolling. The cold rolling mill frame is a closed frame. The upper part of the frame is connected by an upper beam, and the lower part is The roll changing track is connected, the work roll and the back-up roll are in the frame window, the push-up cylinder is installed at the lower part of the frame window, t...

Embodiment 3

[0036] (1) Drawing: drawing the round wire into a square wire.

[0037] (2) Annealing: Using the isothermal recrystallization annealing process, place the square wire rod in a heat treatment furnace, fill the heat treatment furnace with inert gas, then raise the temperature in the furnace to 710°C and keep it for 2.8h; then, heat it at 14°C Cool to 630°C at a cooling rate of 22°C / h and keep warm for 1.8h, then return to room temperature at a cooling rate of 22°C / h; the inert gas is methanol, and the flow rate of methanol gas is 2L / min.

[0038] (3) Cold rolling: use a cold rolling mill to cold-roll square wires to form rectangular wires. Tension rolling is used in cold rolling. The cold rolling mill frame is a closed frame. The upper part of the frame is connected by an upper beam, and the lower part is The roll changing track is connected, the work roll and the back-up roll are in the frame window, the push-up cylinder is installed at the lower part of the frame window, the w...

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Abstract

The invention discloses a producing and machining technology for an ultra width-to-thickness ratio rectangular wire for automobile springs. The technology comprises the following steps that firstly, drawing is conducted, and a circular wire is drawn into a square wire; secondly, annealing is conducted, and the isothermal recrystallization annealing technology is adopted; thirdly, cold rolling is conducted, a cold rolling machine is adopted for conducting cold rolling on the square wire, the rectangular wire is formed accordingly, tension rolling is adopted in cold rolling, the technology is adopted in the cold rolling process for cooling and lubricating, and the reduction rate is controlled to be smaller than 60%. After treatment, in the aspect of wire thickness and width, the deviation is small, and precision is high. The edge portion of the wire is a plane, the corner radius is small, and the fitness degree of the wire and component equipment is high. The appearance of the wire is good, in other words, straightness is good, and the through-strip performance is good. The high deformation forming requirement of customers is met. The surface of the rectangular wire is high in smooth finish, few defects exist, and the rectangular wire is suitable for products with the high requirement for surfaces. The rectangular wire is uniform and consistent in mechanical performance, and high tensile strength, ductility and toughness and other comprehensive performance are achieved. The width-to-thickness ratio of the rectangular wire reaches 10 or above, and the high deformation forming requirement of the customers is met.

Description

technical field [0001] The invention relates to the technology in the field of production and processing of wire rods, in particular to a production and processing technology of rectangular wires with ultra-width-thickness ratios for automobile springs. Background technique [0002] The automobile industry has become one of the fastest growing industries in my country's economy. The automobile industry integrates advanced manufacturing technology and advanced material science, and the development of material science promotes the development of the automobile industry. As one of the basic conditions for the development of the automobile industry, the development and application of new materials is the premise to ensure that my country's automobile industry can track and learn from the world's advanced technologies. At the same time, the development of automobiles has also put forward higher requirements for the development and research of new materials. [0003] Leaf spring...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/04B21D53/88B21B1/16
CPCB21B1/16B21C37/04B21D53/88
Inventor 罗安武王斯华
Owner DONGGUAN KELEE STEEL WIRE
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