A preform forming method for cylindrical helical gear
A technology for cylindrical helical gears and preforms, which is applied in the field of gear processing and manufacturing, can solve problems such as metal fiber distribution, and achieve the effects of simple forming method, improved mechanical properties, and reasonable and reliable design.
Active Publication Date: 2020-05-05
太原德尔瑞机械有限公司
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Problems solved by technology
[0005] In order to solve the problem of metal fiber distribution and gradient grain distribution in the forging of cylindrical helical gear preforms, a preform forming method for cylindrical helical gears is proposed
Method used
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Embodiment
[0036] Embodiment: the preform forming method of the cylindrical helical gear with a helix angle of 45°.
[0037] The preform forming method comprises the following steps: sample preparation by lowering bar, torsion deformation, cutting torsion bar material and rotary upsetting extrusion deformation;
[0038] (1) Lower rod sample preparation:
[0039] According to the forging diagram of the helical gear, the forging process requirements and the principle of constant volume, the material is cut, and the torsional deformation sample is prepared according to the GB / T10128-2007 national standard;
[0040] (2) Torsion deformation:
[0041]First, turn on the power switch of the main engine of the torsion machine, and after the measurement and control system completes the power-on self-inspection, press the "torque reset" and "torsion angle reset" buttons, and then determine the chuck bushing of the clamping block according to the shape of the sample The type of the sample, the rou...
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Abstract
The invention discloses a forming method for a prefabricated blank of a cylindrical helical gear. The forming method for the prefabricated blank comprises the following steps of a lower rod is prepared, twisting deformation is carried out, the twisted rod material is cut and rotary upset-extruding deformation is carried out, wherein a rotary upset-extruding forming mold is composed of a punch anda mold; a channel of the mold is composed of an intrusion section, a forming section and an extrusion section, the forming section is composed of a rotary upset-extruding first section and a rotary upset-extruding second section; and through the combination of the torsion deformation and the rotary upset-extruding deformation, on one hand, the gradient crystal grain distribution characteristics can be realized by performing gradient material preparation on the metal material, and on the other hand, the composite forming mode of upsetting deformation, extrusion forming and torsion shearing deformation of the rod material can be achieved through rotary upset-extruding forming. The forming method has the advantages of being reasonable and reliable in design, simple in forming method and simple and convenient to operate, the comprehensive mechanical characteristics of the preformed blank forming of the cylindrical helical gear are improved, and a good technical foundation is laid for the subsequent forming and machining of the cylindrical helical gear.
Description
Technical field: [0001] The invention relates to the technical field of gear processing and manufacturing, in particular to a method for forming a preform of a cylindrical helical gear. Background technique: [0002] As a common part often used in mechanical transmission, cylindrical helical gear is widely used in high-speed and heavy-duty occasions because of its stable transmission, low impact, vibration and noise. Wear is a common industrial problem in the process of helical gear meshing transmission, so the manufacturing process of helical gears has put forward very high requirements. The processing of gears is generally done by machining the tooth shape, which will inevitably cut off the metal fibers, reducing its strength and life. [0003] In order to solve the technical problem of improving the wear resistance of gears and improving the distribution of metal fibers, a series of gear forming methods are disclosed in the existing patented technology, for example: CN16...
Claims
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IPC IPC(8): B21J1/02C21D7/10C22F1/00
CPCB21J1/02C21D7/10C22F1/00
Inventor 彭先龙
Owner 太原德尔瑞机械有限公司