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Hot proximity forming control method for shaft-disc-fork-shaped force transmission key part
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A control method and near-forming technology, applied in the direction of manufacturing tools, vehicle parts, railway car body parts, etc., can solve the problems of high labor intensity of workers, low production efficiency, and disordered flow lines of forgings, so as to improve local defects and solve forming problems. Difficulty, solve the effect of excessive flash
Pending Publication Date: 2021-09-17
HEFEI UNIV OF TECH
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Problems solved by technology
In the traditional forging production process, the product is usually produced by vertical machine forging or horizontal hammer forging after pulling out the long shaft, but this process has low forging precision and material utilization, high labor intensity and low production efficiency. And other issues
At the same time, it is easy to cause the local streamline disorder of the forging, and the problem of fracture and failure occurs in the concentrated load area of the flange and the rod, which is not conducive to the safety of vehicle operation.
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Embodiment 1
[0059] S1, prepare the original rod-shaped billet: cut the billet into a bar of Φ100mm×165mm, and further process to remove the oxideskin on the billet surface;
[0060] S2, upsetting billet: heat the Φ100mm×165mm bar to 1200°C, hold the time for 90 minutes, heat the upper mold and lower mold to 300°C, and select the flat anvil mold with the central arc radius of R100 as the upper mold, and upsetting thick as Figure 4 shape shown.
[0061] S3, rod lengthening: the rod part of the billet after upsetting is drawn out, and the billet is rotated 90° after each pass is completed, and a total of 6 passes are drawn, and the pressing amount of the first and second passes is 20mm. The amount of depression for the third and fifth passes is 10mm, and that for the fourth and sixth passes is 5mm.
[0062] S4, partial flattening: local flattening of the head of the billet after the rod has been elongated, and the pressing amount of the mold is 8mm.
[0063] S5, pre-forging: use the pre...
Embodiment 2
[0066] S1, prepare the original rod-shaped billet: cut the billet into a bar of Φ100mm×165mm, and further process to remove the oxideskin on the billet surface;
[0067] S2, upsetting billet: heat the Φ100mm×165mm bar to 1100°C, hold the time for 90 minutes, heat the upper mold and lower mold to 300°C, and select the flat anvil mold with the central arc radius of R150 as the upper mold, and upsetting thick as Figure 4 shape shown.
[0068] S3, rod lengthening: the rod part of the billet after upsetting is drawn out, and the billet is rotated 90° after each pass is completed, and a total of 6 passes are drawn, and the pressing amount of the first and second passes is 20mm. The amount of depression for the third and fifth passes is 10mm, and that for the fourth and sixth passes is 5mm.
[0069] S4, partial flattening: local flattening of the head of the billet after the rod has been elongated, and the pressing amount of the mold is 8mm.
[0070] S5, pre-forging: use the pre...
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Abstract
The invention discloses a hot proximity forming control method for a shaft-disc-fork-shaped force transmission key part. The hot proximity forming control method comprises the steps that a pretreatment blank is prepared; upsetting is conducted on the head of the pretreatment blank; the rod part of the pretreatment blank is drawn out; the head of the pretreatment blank is locally flattened; pre-forging is conducted; finish forging is conducted; and an upper die of an upsetting die is a flat anvil with an arc-shaped protrusion in the middle. The middle of the upsetting flat anvil is designed to be the arc-shaped protrusion, and metal distribution is conducted on the blank in advance in the upsetting process; and compared with a traditional flat anvil, the problems that too many flashes exist on the head of a pre-forged piece and the folding defect is prone to occurring are effectively solved.
Description
technical field [0001] The invention relates to the technical field of forming fork-shaped forgings, in particular to a method for controlling thermal approach of a shaft-disk-fork-shaped force transmission key component. Background technique [0002] As the main force-bearing, force-transmitting and control parts in the operation of transportation tools, the key parts of force transmission have complex operating conditions. They not only support the weight of the car body, but also transmit the steering torque and bear the braking torque. And the shape and structure requirements are very strict, making it difficult to manufacture. In the traditional forging production process, the product is usually produced by vertical machine forging or horizontal hammer forging after pulling out the long shaft, but this process has low forging precision and material utilization, high labor intensity and low production efficiency. And other issues. At the same time, it is easy to cause ...
Claims
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Application Information
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