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Quenching anti-deformation device and method

A technology of anti-deformation and quenching pool, which is applied in the field of quenching, can solve the problems of large changes in the liquid level of the quenching tank, difficulty in applying, and many bubbles, etc., and achieve the effects of improving quenching quality, uniform quenching hardness, and reducing internal stress

Active Publication Date: 2017-02-01
YICHANG MARINE DIESEL ENGINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the workpiece is a non-rotating part, the rotation will generate more air bubbles, making this solution difficult to apply
For large-volume workpieces, more spray liquid is required, and ordinary pumps are difficult to meet the requirements, and the liquid level in the quenching tank changes greatly

Method used

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  • Quenching anti-deformation device and method
  • Quenching anti-deformation device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A quenching anti-deformation device, the lower pressing frame 2 and the upper pressing frame 1 are hinged through the connecting rod 4, so as to facilitate the opening and closing between the lower pressing frame 2 and the upper pressing frame 1, and the lower pressing frame 2 and the upper pressing frame 1 to form a space for pressing the workpiece 7, between the lower pressing frame 2 and the upper pressing frame 1 through a plurality of pressing jaws 5; the pressing jaws 5 are formed into a "C" shape;

[0042] An extension is provided on one side of the lower pressing frame 2 or the upper pressing frame 1, and the turning ring 3 is connected to the extension in a rotatable manner.

[0043] The preferred solution is as figure 2 Among them, the structure of the flip ring 3 is as follows: pin shafts are provided on both sides of the ring body, the extension part is in a fork-shaped structure, and a hole is provided at the end, and the pin shaft is rotatably installed i...

Embodiment 2

[0051] Such as Figure 8 Shown in, a kind of quenching method that adopts above-mentioned quenching anti-deformation device, comprises the following steps:

[0052] 1. Install the workpiece 7 between the lower pressing frame 2 and the upper pressing frame 1, the edge of the workpiece 7 is in contact with the workpiece positioning step 9 for positioning, insert the pressing jaw 5 into the jaw positioning gap 10, and press the lower pressing frame 2 is locked with the upper pressing frame 1;

[0053] 2. Put the clamped workpiece 7 flat into the heat treatment furnace; the heat treatment furnace uses a periodic trolley resistance furnace, the position of the turning ring 3 should be convenient for the lifting hook operation of the lifting device 12, and the furnace door should be closed after the furnace is installed.

[0054] Heat insulation. The heat treatment furnace is heated to 840°C and kept for a certain period of time.

[0055] 3. Quenching out of the furnace, hook the...

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Abstract

The invention provides a quenching anti-deformation device and method. A lower pressing frame is hinged to an upper pressing frame through a connecting rod, and a space used for pressing a workpiece is formed between the lower pressing frame and the upper pressing frame. The lower pressing frame and the upper pressing frame are connected in a pressing mode through a plurality of pressing claws. The pressing claws are in a C shape. An extending part is arranged on one side of the lower pressing frame or the upper pressing frame. A turning ring is rotationally connected with the extending part. Through the locked upper pressing frame and the lower pressing frame, enough pressing strength is achieved so that deformation during quenching of the workpiece can be prevented, the deformation amount of the workpiece can be controlled and is smaller than 5 mm, subsequent machining is well guaranteed, and the product quality is improved. Through the arrangement of the turning ring, the large-sized workpiece can be heated in the horizontal state, after heating is completed, the turning ring is hooked with a hoisting device, a workpiece (7) is hoisted vertically and placed in a quenching bath to be quenched, energy consumption is reduced, and the quenching quality is improved.

Description

technical field [0001] The invention relates to the field of quenching, in particular to a quenching anti-deformation device and method. Background technique [0002] A pulley seat casting made of ZG40Mn2, the bottom side length is 1150mm, the thickness is 80mm, the middle seat part is a cylinder with an outer diameter of 420mm, a height of 120mm, and a thickness of 80mm. The heat treatment process is: 800℃~850℃ water quenching. Due to the large size, the internal stress is large during the heat treatment and quenching process, the quenching hardness is uneven, and warping deformation is easy to occur. The deformation generally reaches more than 10mm, and sometimes even exceeds 15mm. Many parts are scrapped due to deformation. [0003] This workpiece has a machining allowance of 6mm before quenching and tempering treatment, and it is required that the deformation after quenching and tempering treatment does not exceed 5mm. Excessive machining allowance reduces the streng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/64C21D9/00
CPCC21D1/64C21D9/0018C21D9/0062
Inventor 朱江华牟方胜雷文郭远景
Owner YICHANG MARINE DIESEL ENGINE
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