Hot pressing former oil cylinder and preparation method thereof

A molding machine and oil cylinder technology, which is used in casting molding equipment, mechanical equipment, casting molds, etc., to achieve the effect of ensuring comprehensive mechanical ability and yield, good economic benefits, and reducing pollution emissions

Inactive Publication Date: 2018-10-12
CHENGDU AERONAUTIC POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The castings of the oil cylinder of the hot press forming machine have many processing sizes, and the important working surfaces are the inner surface of the oil cylinder of the hot press forming machine and the bottom surface of the flat plate. Casting defects such as air holes, shrinkage cavities, shrinkage porosity, cracks, slag and sand inclusions are not allowed, and the heat The oil cylinder surface of the compression molding machine needs to work under a certain pressure, and no defects are allowed at all, otherwise it can only be scrapped, so there is a big risk in casting production, and the current process design needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of the thermoforming machine oil cylinder of the present embodiment comprises:

[0025] (1) After the pig iron is smelted, the chemical composition is analyzed. The test results are as follows: the C content is 3.8%, the Si content is 1.4%, the Mn content is 0.3%, the P content is 0.035%, and the S content is 0.054%. 1520°C for spheroidization;

[0026] The spheroidizing step includes: preparing a spheroidizing bag containing a rare earth spheroidizing agent and an inoculating bag containing a barium and strontium inoculant, pouring molten iron into the spheroidizing bag and the inoculating bag respectively, and waiting for the spheroidizing bag to After reacting for 50 seconds, pour the molten iron in the inoculation bag into the spheroidizing bag and mix.

[0027] (2) After the spheroidization is completed, it is poured in the bottom pouring pouring system, and the pouring conditions include:

[0028] (21) Modeling method: manual modeling in t...

Embodiment 2

[0035] The preparation method of the thermoforming machine oil cylinder of the present embodiment comprises:

[0036] (1) After the pig iron is smelted, the chemical composition is analyzed. The test results are as follows: the C content is between 4.2%, the Si content is 1.7%, the Mn content is 0.28%, the P content is 0.031%, and the S content is 0.045%. The temperature reaches 1550°C, and the spheroidization treatment is carried out;

[0037] The spheroidizing step includes: preparing a spheroidizing bag containing a rare earth spheroidizing agent and an inoculating bag containing a barium and strontium inoculant, pouring molten iron into the spheroidizing bag and the inoculating bag respectively, and waiting for the spheroidizing bag to After reacting for 120s, pour the molten iron in the inoculation bag into the spheroidizing bag for mixing.

[0038] (2) After the spheroidization is completed, it is poured in the bottom pouring pouring system, and the pouring conditions i...

Embodiment 3

[0046] The preparation method of the thermoforming machine oil cylinder of the present embodiment comprises:

[0047] (1) After the pig iron is smelted, the chemical composition is analyzed. The test results are as follows: the C content is between 4%, the Si content is 1.5%, the Mn content is 0.28%, the P content is 0.038%, and the S content is 0.049%. The temperature reaches 1540°C, and the spheroidization treatment is carried out;

[0048] The spheroidizing step includes: preparing a spheroidizing bag containing a rare earth spheroidizing agent and an inoculating bag containing a barium and strontium inoculant, pouring molten iron into the spheroidizing bag and the inoculating bag respectively, and waiting for the spheroidizing bag to After reacting for 80s, pour the molten iron in the inoculation bag into the spheroidizing bag for mixing.

[0049] (2) After the spheroidization is completed, it is poured in the bottom pouring pouring system, and the pouring conditions incl...

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PUM

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Abstract

The invention discloses a hot pressing former oil cylinder and a preparation method thereof, and belongs to the technical field of hot pressing former oil cylinder preparation. A bottom pouring systemis used for pouring; cold iron is arranged on the inner hole surface of a hot pressing former oil cylinder and on the bottom surface of a flat plate; under a synergistic effect of various process parameters, such casting defects as casting working surface air holes, hole shrinkage, looseness, cracks and slag and sand inclusion in the hot pressing former oil cylinder are effectively solved, the comprehensive mechanical capacity and the yield of hot pressing former oil cylinder castings are improved, and the production cost is reduced; and meanwhile, on selection of modeling sand, scrubbing rawsand with an SiO2 content of higher than 90% and a particle size of 50-100 meshes is adopted as the modeling sand, and furan resins are used as adhesives, so that the pollution emission in the casting production process is reduced.

Description

technical field [0001] The invention relates to the technical field of preparation of a hot-press forming machine oil cylinder, in particular to a hot-press forming machine oil cylinder and a preparation method thereof. Background technique [0002] The structure of the oil cylinder of the hot press forming machine is relatively complicated and the conditions of use are high, so the quality requirements for the oil cylinder of the hot press forming machine are high, such as high mechanical properties, and cracks, cold shuts, shrinkage cavities, looseness, and slag inclusions are not allowed defect. Therefore, higher requirements are put forward for the casting process of the cylinder body of the hot press forming machine. The castings of the oil cylinder of the hot press forming machine have many processing sizes, and the important working surfaces are the inner surface of the oil cylinder of the hot press forming machine and the bottom surface of the flat plate. Casting de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/04C22C33/08C21C1/10B22C9/02B22C9/22B22C1/22F16J10/00
CPCC22C37/10B22C1/224B22C9/02B22C9/22C21C1/105C22C33/08C22C37/04F16J10/00
Inventor 马亚鑫岳太文李冬孙建丽甘岑
Owner CHENGDU AERONAUTIC POLYTECHNIC
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