Manufacturing method of vehicle frame longitudinal beam and vehicle frame longitudinal beam manufactured by same
A manufacturing method and longitudinal beam technology are applied in the manufacturing field of longitudinal beams, which can solve the problems of low strength of longitudinal beams, complicated production procedures, and increased processing difficulty, and achieve the effects of preventing tissue growth and improving strength.
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Embodiment 1
[0031] Embodiment 1: The frame used is: DFLK62T0 frame, single-layer longitudinal beam structure:
[0032] A method for manufacturing a vehicle frame longitudinal beam, comprising the following steps in sequence:
[0033] Material preparation steps: first uncoil the rolled girder plate material, and then longitudinally cut the girder plate to obtain the longitudinal beam blank;
[0034] Longeron forming step: forming and processing the above-mentioned longitudinal beam blank to obtain the formed longitudinal beam, this step includes channel beam forming operation and edge trimming operation;
[0035] Hole processing step: performing a hole processing operation on the above-mentioned formed stringer to obtain a formed stringer with holes;
[0036] Induction heat treatment strengthening step: first conduct induction heating on the above-mentioned formed longitudinal beam with holes, the frequency of induction heating is 20kHz, the heating rate is ≥20°C / s, and when it is heated ...
Embodiment 2
[0041] The content is the same as above, the difference is: the frequency of induction heating is 25kHz, the heating rate is ≥20°C / sec, and when heated to 1000°C, the dwell time is ≤30 seconds.
[0042] The volume ratio of undissolved ferrite and low carbon martensite in the finished longitudinal beam is 20%:80%, the tensile strength of the finished longitudinal beam is 1200MPa, and the yield strength is 1100MPa.
[0043] Frame lightweight effect: Compared with the double-layer beam structure frame using high-strength plate material, the dead weight is reduced by 143 kg.
Embodiment 3
[0045] The content is the same as above, the difference is: the frequency of induction heating is 23kHz, the heating rate is ≥20°C / s, and when it is heated to 988°C, it stays, and the dwelling time is ≤30 seconds.
[0046] The volume ratio of undissolved ferrite and low carbon martensite in the finished longitudinal beam is 25%:75%, the tensile strength of the finished longitudinal beam is 1175MPa, and the yield strength is 1075MPa.
[0047] Lightweight effect of the frame: Compared with the double-layer beam structure frame using high-strength plate material, the dead weight is reduced by 141 kg.
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