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Preparing device and method for zero decarburization layer bearing steel wire rod

A zero decarburization layer, preparation device technology, applied in other manufacturing equipment/tools, manufacturing tools, etc., can solve the problems of reduced material utilization rate and dimensional accuracy, inability to achieve continuous operation, low cold heading efficiency, etc., to achieve yield High, high material utilization rate, the effect of improving processing efficiency

Inactive Publication Date: 2017-11-07
洛阳鼎辉特钢制品股份有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Although the prepared material has no decarburized layer, the wire rod has been straightened and cut, which greatly reduces the material utilization rate and dimensional accuracy
At the same time, rolling element companies need to manually insert the straight material into the cold heading machine during use, which cannot achieve continuous operation, resulting in low cold heading efficiency and high labor costs

Method used

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  • Preparing device and method for zero decarburization layer bearing steel wire rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, this embodiment discloses a preparation device for bearing steel wire rod with zero decarburization layer, including a spheroidizing annealing furnace 1, a front cold drawing machine 2, a vertical straightening machine 3, a centerless lathe 4, and a post cold drawing machine 5 and recrystallization annealing furnace 6; the outlet end of the front cold drawing machine 2 is docked with the inlet end of the vertical straightening machine 3, the outlet end of the vertical straightening machine 3 is docked with the inlet end of the centerless lathe 4, the centerless lathe 4 The outlet end is docked with the inlet end of the post-drawing machine 5 . In this embodiment, the upper ring of the spindle disc of the centerless lathe 4 is provided with four symmetrically arranged turning tools. The design of four turning tools on the centerless lathe 4 can accurately and quickly remove the decarburized layer on the surface of the wire rod. Both the spher...

Embodiment 2

[0040] The device, process parameters and process flow included in this example are basically the same as those in Example 1, the difference is that the time for one heat preservation is four hours, and under the premise of ensuring that the bearing steel wire rod is uniformly spheroidized The use time of the spheroidizing annealing furnace is shortened, thereby reducing the use cost of the spheroidizing annealing furnace.

Embodiment 3

[0042] The devices, process parameters and process flow included in this embodiment are basically the same as in Example 2, except that the time for the second heat preservation is three hours. Practice has proved that the second heat preservation time of three hours is more reasonable, avoiding the Too much or too little time for the spheroidizing annealing of the bearing steel wire rod effectively controls the use cost of the spheroidizing annealing furnace.

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Abstract

The invention discloses a preparing device and method for a zero decarburization layer bearing steel wire rod. The preparing device comprises a balling annealing furnace, a front cold drawing machine, a horizontal and vertical straightener, a centreless lathe, a rear cold drawing machine and a recrystallization annealing furnace. The outlet end of the front cold drawing machine is in butt joint with the inlet end of the horizontal and vertical straightener. The outlet end of the horizontal and vertical straightener is in butt joint with the inlet end of the centreless lathe. The outlet end of the centreless lathe is in butt joint with the inlet end of the rear cold drawing machine. The balling annealing furnace, the front cold drawing machine, the horizontal and vertical straightener, the centreless lathe, the rear cold drawing machine and the recrystallization annealing furnace are adopted in the preparing device and method for continuous machining of the bearing steel wire rod, a finished zero decarburization layer bearing steel wire rod high in strength and good in tenacity is obtained, and integral treatment of the large-specification bearing steel wire rod is achieved. The yield is high, the material utilization rate is high, the machining efficiency is improved, and the preparing device and method are suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of bearing steel wire rod preparation, in particular to a preparation device and method for bearing steel wire rod with zero decarburization layer. Background technique [0002] Bearing steel wire rod is a complete coil of bearing steel wire rod with uniform structure, no surface defects and high dimensional accuracy obtained by heat treatment and mechanical processing of hot-rolled bearing steel wire rod. It is the main material for preparing bearing rolling elements. [0003] There are two conventional preparation methods for bearing steel wire rod. For small-sized bearing steel wire rods, the hot-rolled bearing steel wire rods are first spheroidized and annealed, then drawn and reformed, and finally recrystallized and annealed to obtain a decarburized layer thickness of about 1% of the diameter of the bearing steel wire rod. Although the size of the decarburized layer of the bearing steel wire rod prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23P23/04
CPCB23P15/00B23P23/04
Inventor 王静辉万磊
Owner 洛阳鼎辉特钢制品股份有限公司
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