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Casting method of conformal sand-covered chill iron

A chilled iron and sand-covered technology, which is applied to casting molding equipment, molds, and mold components, can solve problems such as prolonging the solidification time of castings, and achieve the effects of improving process yield, avoiding porosity defects, and preventing shrinkage defects

Active Publication Date: 2019-03-15
山东汇金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, too many risers prolong the solidification time of the entire casting. If the hardness of the sand mold is insufficient, it increases the chance of shrinkage and porosity on the casting.

Method used

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  • Casting method of conformal sand-covered chill iron
  • Casting method of conformal sand-covered chill iron
  • Casting method of conformal sand-covered chill iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, this embodiment provides a casting method of joint piece, specifically, the casting method of model is joint piece:

[0034] Regional division

[0035] Such as figure 1 As shown, according to the characteristics of the casting, the casting has 3 hot joints (the determination of the hot joints is a conventional technical means in the art, so in this embodiment, it will not be described in detail), so that the riser is fed against one hot joint, According to the basic modulus method, the feeding range of the riser is calculated. In order to expand the feeding range of the riser, the sand-covered cold iron is designed so that the feeding range of the riser is "riser action area + terminal area + cold iron action area" while covering the entire casting.

[0036] Conformal sand-covered cold iron design.

[0037] Determine the application modulus of the chilled iron action area, that is, the modulus of the casting adjacent to the chilled iron is taken as the ...

Embodiment 2

[0050] Embodiment 2. This embodiment provides a casting method for a differential carrier, specifically, a casting method whose model is a differential carrier:

[0051] Regional division:

[0052] Such as figure 2 As shown, according to the characteristics of the casting, the casting has 3 hot joints, and the structural shape is similar to that of The feeding range of the riser is calculated by the basic modulus method. In order to expand the feeding range of the riser, the sand-covered cold iron is designed so that the feeding range of the riser is "riser action area + terminal area + cold iron action area". Cover the entire casting.

[0053] Design of Conformal Sand-Coated Chill Iron

[0054] Determines the applied modulus of the chilled iron zone. That is, the modulus of the casting adjacent to the cold iron is taken as the section modulus at the position of the natural end area, and the analysis is 0.87cm; if Mr≤0.87cm, take Mr=0.81cm;

[0055] Determine the thickne...

Embodiment 3

[0065] Embodiment 3, this embodiment provides a casting method for planetary wheel housing casting

[0066] Such as image 3 As shown, the flange of this casting is well-proportioned in ring shape, and there is no end area after the riser is set on the side of the flange. An artificial end zone can be created using a conformal grit chill. The thickness of the flange is 16mm. According to the relevant casting manual, the feeding distance of the riser is about 127mm. Iron zone.

[0067] Determine the cold iron action area and the length of the cold iron. The circumference of the flange is φ320×3.14=1004.8(mm), and the length of the cold iron action area is 1004.8-308=696.8mm. Since the length of the cold iron is too long, in order to facilitate processing, the cold iron is divided into 3 pieces, each with a length of L =226mm, located in the same core body and evenly distributed.

[0068] Considering that the total length of the cold iron is more than 500mm, it is determine...

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Abstract

The invention belongs to the field of casting and relates to sand-lined denseners, in particular to a conformal sand-lined densener casting method. The casting method includes the following steps that firstly, the number of thermal joints of a casting is confirmed; secondly, a dead head is arranged on any thermal joint of the casting; thirdly, a densener is arranged on any thermal joint surrounding the thermal joint with the dead head; and fourthly, according to the condition that if the dead head action region, the tail end region and the densener action region are covered, the whole casting is covered, dead heads and denseners are additionally arranged, and the second step and the third step are repeated, so that the whole casting can be covered with the dead heads and the denseners. Compared with the prior art, the conformal sand-lined densener casting method has the advantages and the beneficial effects that the conformal sand-lined densener casting method is provided, the manner that one thermal joint needs one densener in a traditional casting process is changed, and the shape of the denseners is designed according to the shape of the casting, so that the action regions of the denseners are enlarged from point to plane, and the defects existing in the traditional casting process are overcome.

Description

technical field [0001] The invention belongs to the field of casting, and relates to a sand-coated chill, in particular to a casting method for a conformal sand-coated chill. Background technique [0002] Casting is a kind of metal thermal processing technology mastered by human beings earlier. Casting is a method of casting liquid metal into a casting cavity suitable for the shape of the part, and obtaining parts or blanks after it is cooled and solidified. The material to be cast is mostly a metal that was originally solid but heated to a liquid state (eg copper, iron, aluminum, tin, lead, etc.), and the material of the mold can be sand, metal or even ceramics. Depending on the requirements, the methods used will vary. [0003] During casting, due to the structure and casting parameters, the solidification time of molten iron at each point in the mold cavity is not equal, which will cause thermal stress to the casting after solidification, resulting in deformation, cracks...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/02B22D27/04
CPCB22C9/02B22D27/04
Inventor 孔庆柱吕海峰许文青
Owner 山东汇金股份有限公司
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