Oil pump gear shaft precision forging forming die and forming method

A technology for oil pump gears and forming dies, which is used in manufacturing tools, forging/pressing/hammer devices, forging/pressing/hammering machines, etc. Reduced life, high production cost, long processing time and other problems, to achieve the effect of solving the difficulty of mold release, improving product performance and low processing cost

Inactive Publication Date: 2016-06-08
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using cutting technology to produce gears, the processing time is long, the production efficiency is low, and the production cost is high.
At the same time, the cutting process will destroy the fiber structure of the metal, so the bending fatigue strength of the gear tooth, the contact fatigue strength and wear resistance of the tooth surface, and the service life will all be reduced, and the utilization rate of cutting materials is low and the energy consumption is high.

Method used

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  • Oil pump gear shaft precision forging forming die and forming method
  • Oil pump gear shaft precision forging forming die and forming method
  • Oil pump gear shaft precision forging forming die and forming method

Examples

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Embodiment Construction

[0024] Such as Figure 6 As shown, the oil pump gear shaft forged by the example of the present invention includes a toothed part and a shaft part on both sides; The lower layer of the mold is assembled by the interference of the inner and outer rings; each part of the mold is pressed figure 1 The structural assembly shown: the upper mold 1 is installed under the upper slider of the press, the base 5, the lower layer of the lower mold 4, and the toothed mold 3 ( image 3 ), lower mold upper layer 2 ( figure 2 ) into the lower mold base 7 in turn, and fixed on the press frame by the lower mold outer ring 6; the demoulding ring 8 is fixed on the lower mold outer ring 6 by nuts.

[0025] In this example, the mold is installed on a 1000T double-disc friction press for precise forging of the oil pump gear shaft. The forging speed is about 200mm / s. Both the forging mold and the forging are coated with water-based graphite lubricant.

[0026] The precision forging of the oil pum...

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Abstract

A mold structure and forming method for the shaft forging forming of the oil pump gear shaft belongs to the processing technology of the gear shaft, which provides a mold structure and forming method for the forming of concave molded oil pump gear axis.The mold structure mainly includes the upper mold, the lower mold, the tooth mold, the lower layer, the bottom, the bottom, the outer ring, the pressure ring, the departure ring, the mold type cavity is divided into three layers, the lower layer, the tooth shape of the tooth shapeThe lower layer of the mold and the lower mold, the two side shafts and tooth shapes of the gear shaft are formed, respectively.Oil pump gear shaft fine forging method includes three steps, heating stick materials, only heating the forming part of the tooth shape, that is, the middle section of the bar; the gear axis of the essence forgingAfter forging, separate the forging and tooth molded molds.Three steps can complete the rough processing of the oil pump gear shaft and tooth shape. The processing efficiency is high, the material is saved, and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of gear shaft processing, and provides a die structure and a forming method for precision forging forming of a concave die layered oil pump gear shaft, which are used for precision forging production of the oil pump gear shaft. Background technique [0002] Gear oil pumps are widely used in devices such as liquid transportation and hydraulic systems. The gear shaft in the oil pump is a basic part commonly used in mechanical structures. Gear pump gears are usually not standard gears. Gear pump gears have a large coefficient of variation and a high The tooth top is high. In order to adapt to the characteristics of compact size and high alignment accuracy of the gear pump, the gear of the gear pump is generally machined as a whole with the gear and the shaft. At present, the gear processing technology generally starts with hot forging to form the tooth blank, and the tooth shape is completed by cutting process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J13/02B21K1/06B21J5/02
Inventor 王宝雨左斌杨乐毅史全宇
Owner UNIV OF SCI & TECH BEIJING
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