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Bridge Structural Parts for Trucks

A technology for bridge structures and structural parts, applied in vehicle parts, motor vehicles, casting and molding equipment, etc., can solve the problems of uneven wall thickness and difficult to complete, and achieve smooth castings, reduce surface defects, and increase microstructure and metallographic properties. Effect

Active Publication Date: 2018-11-27
伟成金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The bridge structural parts on the truck play a very critical role in connection, load and force transmission. Therefore, the quality of its mechanical properties directly affects the safety of the truck; It is difficult to process slotted holes, and there are many structures with uneven wall thickness and high and low heights. It is difficult to complete if traditional cutting technology is used; at present, casting technology is mostly used, but because this structural part requires very high mechanical Strength and casting defects such as pores, sand holes, cracks, burrs are not allowed, the current casting process is difficult to meet this requirement

Method used

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  • Bridge Structural Parts for Trucks
  • Bridge Structural Parts for Trucks

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Experimental program
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Effect test

Embodiment

[0023] as attached Figure 1-2 As shown, the structural member of the present invention includes a body 1, the body is curved in an arc shape, a pair of first mounting holes 2 are symmetrically arranged at each end of the body, and one end of the body is located in front of the first mounting hole. There are two second installation holes 3 on the upper part, and the axes of the first installation hole and the second installation hole are perpendicular to each other; the arc-shaped curved body is located on the concave surface and is symmetrically provided with grooves 4 near both ends. A first bump 5 is arranged symmetrically near the middle, and a second bump 6 is symmetrically arranged near the two ends of the convex surface.

[0024] The specific preparation steps of the structure are: modeling, trimming, welding, coating, dewaxing, shell roasting, steel casting, sand cleaning, grinding, regular normalizing-post-treatment, etc.

[0025] (1) The mold for preparing the wax m...

Embodiment 2

[0036] The preparation method is the same as in Example 1, and the specific raw material ratio is: carbon 0.22%, silicon 0.20-0.60%, manganese 1.30%, sulfur 0.005%, phosphorus 0.015%, chromium 0.10%, nickel 0.20%, molybdenum 0.10%, carbon equivalent ≤0.47%, the balance is iron.

[0037] The sample that above-mentioned embodiment of the present invention obtains, concrete mechanical property is as follows:

[0038] Tensile strength 500-600N / mm 2 , yield strength ≥ 300N / mm 2 , elongation ≥ 22%, hardness (HB) 160-200; Therefore, from the above-mentioned test data, it can be seen that the bridge structure for trucks of the present invention has high hardness, strong tensile strength, high elongation, is not easy to break, and has a high load-bearing capacity. Strong advantage.

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Abstract

The invention discloses a bridge structural member for a truck and an investment casting method of the bridge structural member. The structural member comprises a body with an arc bending shape, each of two ends of the body is symmetrically provided with a pair of first mounting holes, one end, located at the front parts of the first mounting holes, of the body is provided with two second mounting holes, and axes of the first mounting holes are perpendicular to the axes of the second mounting holes; grooves are symmetrically formed in the positions, close to two ends of a concave surface, of the arc bending shaped body, first bumps are symmetrically arranged at the positions , close to the middle part of the concave surface, of the arc bending shaped body, second bumps are symmetrically arranged at the positions close to two ends of a convex surface; furthermore, the structural member is prepared from the following components in percentage by weight: 0.17 to 0.23 percent of carbon, 0.20 to 0.60 percent of silicon, 1.00 to 1.50 percent of manganese, not more than 0.02 percent of sulfur, not more than 0.025 percent of phosphorus, not more than 0.30 percent of chrome, not more than 0.40 percent of nickel, not more than 0.15 percent of molybdenum, not more than 0.47 percent of carbon equivalent and the balance of iron. The bridge structural member for the truck and the investment casting method thereof provided by the invention have the advantages that the mechanical strength is efficiently improved, the multipurpose using requirement on the truck is met, and the casting defects are reduced.

Description

technical field [0001] The invention belongs to the technical field of bridge structural parts for trucks, and in particular relates to a bridge structural part for trucks and an investment casting method thereof. Background technique [0002] The bridge structural parts on the truck play a very critical role in connection, load and force transmission. Therefore, the quality of its mechanical properties directly affects the safety of the truck; It is difficult to process slotted holes, and there are many structures with uneven wall thickness and high and low heights. It is difficult to complete if traditional cutting technology is used; at present, casting technology is mostly used, but because this structural part requires very high mechanical Strength and casting defects such as pores, sand holes, cracks, and burrs are not allowed. It is difficult for the current casting process to meet this requirement. Contents of the invention [0003] The present invention aims at t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60D1/00B62D63/08C22C38/02C22C38/04C22C38/44B22C9/04B22C3/00
CPCB22C3/00B22C9/04B60D1/00B62D63/08C22C38/02C22C38/04C22C38/44
Inventor 潘吉裕魏春锋
Owner 伟成金属制品有限公司