Extruding and die-casting process for electric steering shell with high strength and low porosity

An electric steering and die-casting technology, applied in the field of die-casting, can solve the problems of poor internal quality, substandard porosity, shrinkage cavity, and large local wall thickness, and achieve the effect of improving product strength, avoiding shrinkage cavity defects, and fine internal organization.
CN106345985AInactive Publication Date: 2017-01-25TAICANG HAIJIA VEHICLE FITTINGS
8 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
TAICANG HAIJIA VEHICLE FITTINGS
Publication Date
2017-01-25
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to an extruding and die-casting process for an electric steering shell with high strength and low porosity. The die-casting method comprises the following steps: melting materials, fixing a mold with a local extruding device to a die-casting machine, carrying out extrusion and die casting when the materials are semi-solidified, and carrying out final die casting to obtain a product. The extruding and die-casting process has the advantages that in structure design of the mold, the local extruding device is adopted, so as to extrude the connecting parts (parts where the die casting pressure cannot be transferred) between holes with thicker walls; a special mold is adopted for designing the structure, when mixed materials are filled into a cavity and then take on a semi-solidified state, an extruding pin is pushed by an oil cylinder to extrude the connecting parts between the holes with thicker walls tightly, so that the defect of hole shrinkage is avoided, and the porosity can be controlled within 3%; the internal structure of a die-casting part is finer, so that the strength of the product is greatly improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of die-casting, and more particularly relates to a extrusion die-casting process of a high-strength and low-porosity electric steering housing. Background technique

[0002] With the popularization of electric power steering systems, the production capacity requirements of steering gear housings are also getting higher and higher. At the same time, under the influence of cost reduction and weight reduction in the automotive market, the use of die-casting aluminum alloys and the weight design of parts tend to maintain a reduction While being heavy, higher product strength is required to ensure that the car is lightweight and has higher safety performance. The above-mentioned technical standards are reflected in the casting quality of the steering gear casing, that is, the internal porosity of the key stress-bearing parts is below 3%, and there is no shrinkage cavity at the same time.

[0003] In the prior art, the str...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More