Method for preparing commercial vehicle steering gear housing

A technology for steering gears and commercial vehicles, which is applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., and can solve problems such as easy cracking of products, unqualified pearlite content, shrinkage cavities and shrinkage porosity, etc.

Active Publication Date: 2020-04-03
SHANDONG LIANCHENG PRECISION MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The steering gear shell we are currently producing is an important part of the steering gear. It has an important structure and strict requirements. The current technical solution is a common pressure riser feeding product, which is molded with molding sand. After production, the product is prone to cracking and shrinkage. Seriously, the pearlite content cannot be guaranteed to be qualified under the production state that guarantees the tensile strength

Method used

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  • Method for preparing commercial vehicle steering gear housing
  • Method for preparing commercial vehicle steering gear housing
  • Method for preparing commercial vehicle steering gear housing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1 product model, 1139395

[0052] A method for preparing a commercial vehicle steering gear housing, including the production of cold sand cores, the design steps of the composition of the original molten iron, the casting process steps, the use of the cover core, and the design steps of the low-tension pressure riser; the casting process steps include the top injection process Steps and iron mold covered with sand chilled iron.

[0053] The production of the cold sand core, the specific steps are as follows: the ratio of raw materials is as follows: the amount of furan resin added accounts for 0.8% of the weight of the original sand, the proportion of type I resin in furan resin accounts for 50%, the proportion of type II resin accounts for 50%, and the amount of catalyst added It accounts for 0.2% of the weight of the original sand; add the raw materials for sand mixing, and then perform core making, hardening, washing, mold opening, and core removal in sequen...

Embodiment 2

[0071] Embodiment 2 product model, 1138395.

[0072] Please fill in the parameters that have changed. The following iron mold is made of sand-coated cold iron with a length of 110mm, a width of 50mm and a thickness of 15mm, and the sand-coated process in the middle; refer to Figure 9 .

Embodiment 3

[0073] Embodiment 3 product model 1139865.

[0074] Please fill in the parameters that have changed. The following iron mold is made of sand-coated cold iron with a length of 110mm, a width of 45mm and a thickness of 10mm, and the sand-coated process in the middle; refer to Figure 10 .

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Abstract

The invention relates to the technical field of a steering gear housing, in particular to a method for preparing a commercial vehicle steering gear housing. The method includes the steps of the production of cold sand cores, the use of cover cores and the design of components, and the formulation of the casting process includes the top pouring process and sand coated iron mould chills to ensure the use performance of products; and a low-tension pressure riser structure is designed to ensure the feeding of hot spot parts of the products. The products meet the requirements of second-level X-rayflaw detection and I-level magnetic particle flaw detection, are qualified in the ultrasonic detection and fully meet the production requirements of customers. After the improvement of the scheme, theproblems of product box cracking and shrinkage porosity are solved. Under the condition of ensuring the tensile strength, the content of pearlite reaches the requirements, and the spheroidization rate is guaranteed. The scheme is fully qualified after being verified.

Description

technical field [0001] The invention relates to the technical field of a steering gear housing, in particular to a method for preparing a steering gear housing of a commercial vehicle. Background technique [0002] The steering gear is the most important part of the steering system. Its function is to increase the force transmitted from the steering wheel to the steering transmission mechanism and change the direction of force transmission. Steering gear can be divided into various types according to the structure. Currently commonly used rack and pinion type, worm crank pin type and recirculating ball type. The steering gear carries the steering function of the car, so it occupies a very important position in car manufacturing. [0003] The steering gear shell we are currently producing is an important part of the steering gear. It has an important structure and strict requirements. The current technical solution is a common pressure riser feeding product, which is molde...

Claims

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Application Information

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IPC IPC(8): B22C1/22B22C9/08B22C9/10B22C9/06C22C37/10B22D1/00B22D27/04B22C9/24
CPCB22C1/224B22C9/065B22C9/068B22C9/082B22C9/088B22C9/10B22C9/24B22D1/00B22D27/04C22C37/10
Inventor 解云龙吴卫明盛恒恒胡茂昌周向东
Owner SHANDONG LIANCHENG PRECISION MFG CO LTD
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