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Manufacturing technology of walking machinery bracket casting

A manufacturing process and casting technology, which is applied in the field of bracket castings for automatic control of hydraulic systems, can solve the problems of wasting molten iron, high production costs, and low yield of casting processes.

Inactive Publication Date: 2014-02-26
南通华东油压科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But we found a problem when calculating the process yield rate, the process yield rate of castings is too low, only 33%
Such a low process yield leads to high production costs of castings, wastes a lot of molten iron, and affects production efficiency

Method used

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  • Manufacturing technology of walking machinery bracket casting
  • Manufacturing technology of walking machinery bracket casting
  • Manufacturing technology of walking machinery bracket casting

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Embodiment Construction

[0041] This embodiment discloses the 6324120-0203 bracket casting.

[0042] Such as figure 1 , Figure 3 to Figure 10 Shown: the specific process is as follows:

[0043] a. Make the shell mold of the film-coated sand box, including a bottom mold 1, a cover mold 3 and a middle mold 2, and the bottom mold 1, middle mold 2 and cover mold 3 are stacked sequentially from bottom to top, and the bottom mold 1 and the cover mold 3 and the middle mold 2 are positioned by cylindrical positioning protrusions,

[0044] b. Set a 90mm heating riser 5 at the center of the upper die 1; the riser 5 is a traditional riser that is sawed at 1 / 3 from the middle and upper part in the radial direction to form two upper and lower sections (5a, 5b), and A filter screen 4 is placed on the parting surface between the sections, and the upper and lower sections (5a, 5b) are bonded together with an adhesive to form a riser with a filtering function. It is worth noting that in this embodiment, the...

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Abstract

The invention discloses a manufacturing technology of a waking machinery bracket casting. The technology comprises the following steps: step a, manufacturing a shell mould of a precoated sand box and an upper mould; step b, arranging an exothermic riser in the center position of the upper mould; step c, pouring molten iron into the precoated sand box within 8 to 10 seconds at a temperature of 1380 DEG C; step d, placing an exothermic agent on the top part of the exothermic riser after the pouring process, allowing the box to stand still, wherein in this process, the exothermic property of the exothermic riser is utilized so as to prolong the solidification time of the molten iron, the feeding is strengthened, the stand-still time is 1 to 1.5 hours, and the molten iron cools and forms a casting blank; step e, subjecting the casting blank to a post-treatment so as to obtain a finished casting. The manufacturing technology has the advantages that: through the experiments of the technology mentioned above, casting dissection and dye penetrant inspection both meet the clients' requirements, the technology yield is raised from 33% to 71%, and thus the casting production cost is largely reduced.

Description

technical field [0001] The invention relates to a manufacturing process of a bracket casting of a walking machine, in particular to a bracket casting for an automatic control hydraulic system. Background technique [0002] This invention relates to the 6324120-0203 bracket casting. It is widely used in the manufacture of heavy-duty walking machinery such as Sany Heavy Industry of Kawasaki Company in Japan. It is mainly used in the walking system of construction machinery such as excavators and bulldozers, and its force is relatively large. As a key stress-bearing part of walking machinery, this product has high requirements for its mechanical properties, fatigue properties, internal structure and compactness, and the casting must be inspected for flaw detection. [0003] 1. The main technical parameters of the bracket [0004] 1. Main technical parameters [0005] Casting weight 17KG [0006] Product material: QT600-3 [0007] Tensile strength: ≥600MPa [0008] Elongat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/22B22C9/08
Inventor 马建华张龙楼范小亮
Owner 南通华东油压科技有限公司
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