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Buffer preparation method

A technology of buffers and preparation steps, which is applied in the direction of shock absorbers, shock absorbers, mechanical equipment, etc., can solve the problems of large dust in foundry workshops, increased labor load of workers, and many sand mold manufacturing processes, so as to improve the working environment and save Manpower and the effect of reducing production costs

Active Publication Date: 2017-07-25
NINGBO JINHUI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned casting process requires a large amount of sand, and there are many sand mold manufacturing processes, and the subsequent sand cleaning task is heavy. Workers need a large workload of sand blasting, which greatly increases the labor load of workers, and the foundry workshop is dusty and the production cost is high.

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] (1) First, the Bonnie No. 2 thermosetting resin is mixed with quartz sand to obtain the sand material for preparing the buffer sand shell, and the usage amount of Bonnie No. 2 thermosetting resin is 1.5% of the weight of the quartz sand;

[0021] (2) Then put the sand material prepared in step (1) into the sand-shooting machine, heat the sand material to 150-155°C, and then sandblast molding under a pressure of 6 atmospheres to obtain a sand with a buffer cavity The shell, the sand shell is naturally cooled for use, and the thickness of the sand shell is 50mm;

[0022] (3) according to each component configuration of following weight percent, prepare the raw material of buffer: carbon (C) 0.31%, manganese (Mn) 1.0%, silicon (Si) 0.3%, chromium (Cr) 0.4%, molybdenum (Mo) 0.12%, nickel (Ni) 0.20%, sulfur (S) 0.05%, phosphorus (P) 0.04%, and the balance is iron; then the raw materials are mixed, heated and melted to 1000-1300 ° C, and then the molten metal is poured into t...

Embodiment 2

[0025] (1) First, the Bonnie No. 2 thermosetting resin is mixed with quartz sand to obtain the sand material for preparing the buffer sand shell, and the usage amount of Bonnie No. 2 thermosetting resin is 1.8% of the weight of the quartz sand;

[0026] (2) Then put the sand material prepared in step (1) into the sand-shooting machine, heat the sand material to 155-160°C, and then sandblast molding under a pressure of 5 atmospheres to obtain a sand with a buffer cavity The shell, the sand shell is naturally cooled for use, and the thickness of the sand shell is 60mm;

[0027] (3) according to the following components by weight percentage configuration preparation buffer raw materials: carbon (C) 0.35%, manganese (Mn) 1.1%, silicon (Si) 0.36%, chromium (Cr) 0.46%, molybdenum (Mo) 0.14%, nickel (Ni) 0.10%, sulfur (S) 0.03%, phosphorus (P) 0.03%, and the balance is iron; then the raw materials are mixed, heated and melted to 1260-1300°C, and then the molten metal is poured into t...

Embodiment 3

[0030] (1) First, the Bonnie No. 2 thermosetting resin is mixed with quartz sand to obtain the sand material for preparing the buffer sand shell, and the usage amount of Bonnie No. 2 thermosetting resin is 1.6% of the weight of the quartz sand;

[0031] (2) Then put the sand material prepared in step (1) into the sand blasting machine, heat the sand material to 140-145°C, and then sandblast the mold under a pressure of 4.5 atmospheres to obtain a sand with a buffer cavity The shell, the sand shell is naturally cooled for use, and the thickness of the sand shell is 35mm;

[0032] (3) According to the following components by weight percentage configuration preparation buffer raw materials: carbon (C) 0.31%, manganese (Mn) 1.0%, silicon (Si) 0.22%, chromium (Cr) 0.35%, molybdenum (Mo) 0.11%, nickel (Ni) 0.15%, sulfur (S) 0.03%, phosphorus (P) 0.03%, and the balance is iron; then the raw materials are mixed, heated and melted to 1000-1050°C, and then the molten metal is poured int...

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Abstract

A preparation method of a buffer comprises the following preparation steps: at first, mixing No. 2 Bangni thermosetting resin with quartz sand to obtain sand for preparing a sand shell of the buffer, wherein the using amount of the thermosetting resin is 1.3%-2.0% of the weight of the quartz sand; then placing the sand in a sand shooting machine to obtain the sand shell with a buffer cavity; next pouring molten metal obtained through smelting raw materials of the buffer in the sand shell; and within 0.6-1.5 h after the pouring is finished, conducting pyrolysis devolatilization on the No. 2 Bangni thermosetting resin in the sand shell, and scattering the quartz sand from the condensed metal surface to obtain the buffer. The preparation method has the advantages that the sand is scattered completely, manual sanding is not required, and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of buffer casting, in particular to a preparation method of the buffer. Background technique [0002] The buffer is a very critical part in a motor vehicle, and its quality directly affects the anti-seismic performance of the vehicle and the safety performance of the vehicle, especially for the extra-large buffer used on the train, the quality of which is even more critical. buffer used, as attached figure 1 Shown: Generally, it is a cuboid-shaped buffer body, on which there are multiple installation holes, slots, etc.; installation holes and clamping positions are also arranged inside. Due to the special structure of the buffer, the traditional forging method cannot be realized. At present, the casting method is used more, that is, the specific process is as follows: 1) Production process preparation, according to the parts diagram to be produced, the production batch and Delivery deadlines, formulate pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/18C22C38/12C22C38/08B22C9/22B22C1/22F16F7/00
CPCB22C1/22B22C9/22C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18F16F7/00
Inventor 任国良胡春华马先民
Owner NINGBO JINHUI PRECISION CASTING
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