Abstract
In order to realize the need for lightweight automobiles through replacing steel with plastics, the research and development of the plastic clutch pump body based on the friction welding was carried out. For the clutch pump body connected by friction welding process between the upper pump body and the lower pump body, the technical requirements of pressure 14 MPa and durability (high temperature 7.0 × 104 times, room temperature 7.0 × 105) are required. The structure type of the upper and lower pump bodies of the end face welding type was proposed. Through the static analysis of the pump body and weld and the mechanical analysis under the working condition, the structure of the clutch pump body (upper and lower pump body) was determined. According to the established welding process, the pressure of the clutch pump body is more than 15 MPa, and the number of high-temperature durable circulation and the number of room temperature durable circulation also reached 7.2×104 and 7.3×105 times respectively. The results show that the structural design of a clutch pump body meets the design requirements.
Highlights
As plastic parts can meet the requirements of lightweight and satisfy the safety and environmental protection standards, automobile plastic parts emerge at the right moment
In order to provide a reference for its design, it is necessary to analyze the structure of the pump body of the plastic clutch considering the welding process
On the way of end face welding, when the welding surface of the inner end face of the upper pump body contacts with the welding surface of the outer end face of the lower pump body, the pressure stress is uniform, and the friction heat generated per unit time is the same, which ensures the stability of the plastic melting process
Summary
As plastic parts can meet the requirements of lightweight and satisfy the safety and environmental protection standards, automobile plastic parts emerge at the right moment. The plastic clutch master pump ( Fig. 1a) is an important component of the automobile clutch control system. In order to provide a reference for its design, it is necessary to analyze the structure of the pump body of the plastic clutch considering the welding process. No relevant report on the design of a clutch pump body (Fig. 1) mentioned in this paper has been seen. The above research has certain reference value, it is not enough to guide the structural design of a clutch pump body using friction welding. This paper puts forward the structural design scheme of the clutch pump body based on the friction welding technology. Through the strength analysis of the clutch pump body and its weld, as well as the test verification, the correctness of the structural design of a clutch pump body is clarified
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