Special fixture for valve spring heat treatment and valve spring heat treatment method
A heat treatment method and valve spring technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of easy deformation of valve springs and achieve the effect of preventing deformation
Active Publication Date: 2021-08-06
CHINA HANGFA SOUTH IND CO LTD
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- Abstract
- Description
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- Application Information
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Problems solved by technology
[0004] The invention provides a special fixture for heat treatment of valve springs and a heat treatment method for valve springs to solve the problem that valve springs are easily deformed during heat treatment
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[0028] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0029] figure 1 is a schematic diagram of a special fixture for valve spring heat treatment in a preferred embodiment of the present invention; figure 2 is the front view of the mandrel of the preferred embodiment of the present invention; image 3 is a side view of the mandrel of the preferred embodiment of the present invention; Figure 4 is a cross-sectional view of a mandrel in a preferred embodiment of the present invention; Figure 5 is a schematic diagram of the first abutting member in a preferred embodiment of the present invention; Image 6 is a schematic diagram of the second abutting member of the preferred embodiment of the present invention.
[0030] Such as figure 1 As sho...
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Abstract
The invention provides a special fixture for heat treatment of valve springs and a heat treatment method for valve springs. The special fixture includes a mandrel and a stretching mechanism installed in the inner cavity of the mandrel. There are grooves on the outer surface of the movable part, and the combination of multiple grooves constitutes a groove for fitting with the valve spring to constrain the valve spring. The movable part is stretched along the radial direction of the mandrel by the stretching mechanism. After the movable part is stretched in place, the shape and size of the groove are consistent with the design shape and design size of the valve spring. The special fixture adopts a complementary structure to fix the valve spring in the groove, and constrain the valve spring through the groove, so that the shape and size of the valve spring are consistent with the shape and size of the groove, which can prevent the valve spring from being damaged during the heat treatment process. Medium deformation can make the shape and size of the valve spring match the design shape and size of the valve spring.
Description
technical field [0001] The invention relates to the technical field of heat treatment of valve springs, in particular to a special fixture for heat treatment of valve springs. In addition, the present invention also relates to a valve spring heat treatment method using the above-mentioned special fixture for valve spring heat treatment. Background technique [0002] The main function of valve springs in aero-engines is to ensure that the valves are seated in time and fit tightly, and to prevent the valves from jumping when the aero-engine vibrates and damage its sealing. The valve spring is in the environment of high temperature, alternating load and high frequency vibration, which has a great influence on the dynamic performance and working life of the aero-engine. [0003] Due to the large size of the valve spring and high precision requirements, the deformation of the valve spring often occurs during the heat treatment process, which is manifested by defects such as unev...
Claims
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IPC IPC(8): C21D9/02C21D1/62
CPCC21D1/62C21D9/0025C21D9/02
Inventor 胡海鹏竟利娟刘珊魏九高王国奇文钰秦健张贤忠
Owner CHINA HANGFA SOUTH IND CO LTD