Machining process for large spring pieces
A processing technology and spring sheet technology, which is applied in the field of large spring sheet processing technology, can solve the problems of not ensuring that no cracking and deformation meet the requirements, and achieve the effect of reducing quenching stress
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Embodiment 1
[0027] A processing technology for a large-scale spring piece, comprising the following steps: blanking of a 3mm plate → stamping → trimming → rough grinding → heat treatment → fine grinding → oxidation treatment → packaging.
[0028] Wherein, the heat treatment includes high temperature tempering, quenching and medium temperature tempering.
[0029] The high-temperature tempering is to perform one high-temperature tempering at 500-600° C. on the roughly ground steel sheet.
[0030] The quenching is heated by an RJX-75-9 box furnace, and after the heat preservation is completed, a 4t quenching press is used to spray oil for cooling. The medium-temperature tempering is carried out in an RJJ-75-6 well-type tempering furnace, and the medium-temperature tempering temperature is 350-380°C.
Embodiment 2
[0032] A processing technology for a large-scale spring piece, comprising the following steps: blanking of a 3mm plate → stamping → trimming → rough grinding → heat treatment → fine grinding → oxidation treatment → packaging.
[0033] Wherein, the heat treatment includes high temperature tempering, quenching and medium temperature tempering.
[0034] The high-temperature tempering is to perform one high-temperature tempering at 500-600° C. on the roughly ground steel sheet.
[0035] The quenching is heated by an RJX-75-9 box furnace, and after the heat preservation is completed, a 4t quenching press is used to spray oil for cooling. The medium-temperature tempering is carried out in an RJJ-75-6 well-type tempering furnace, and the medium-temperature tempering temperature is 4000-450°C.
Embodiment 3
[0037] A processing technology for a large-scale spring piece, comprising the following steps: blanking of a 3mm plate → stamping → trimming → rough grinding → heat treatment → fine grinding → oxidation treatment → packaging.
[0038] Wherein, the heat treatment includes high temperature tempering, quenching and medium temperature tempering.
[0039] The high-temperature tempering is to perform one high-temperature tempering at 500-600° C. on the roughly ground steel sheet.
[0040] The quenching is heated by an RJX-75-9 box furnace, and after the heat preservation is completed, a 4t quenching press is used to spray oil for cooling. The medium-temperature tempering is carried out in an RJJ-75-6 well-type tempering furnace, and the medium-temperature tempering temperature is 350-380°C.
[0041] It also includes the surface nitriding heat treatment process, the nitriding temperature is 460-490°C, and the gas nitriding time is 8-24 hours.
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