Method for producing heat-resistant steel automobile exhaust pipes by iron mold sand lining process
A technology of automobile exhaust and sand-coating of iron molds, which is applied in the direction of manufacturing tools, metal processing equipment, casting molding equipment, etc., can solve the problems of high precision requirements of blanks, restrictions on the application of heat-resistant steel materials, and difficulties in meeting standards, etc., to achieve Improve the precision of castings, improve the yield and product quality, and ensure the effect of compactness
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[0031] Example 1:
[0032] A method for producing a heat-resistant steel automobile exhaust pipe with an iron mold sand coating process:
[0033] 1. First analyze the profile and wall thickness characteristics of the automobile exhaust pipe, and preliminarily determine the chilling position in the casting.
[0034] 2. Adjust the gap between the mold and the sand box according to the chilling position of the casting, and then determine the thickness of the sand shell and the precise chilling position. The overall thickness of the sand shell is 10mm, and the thickness of the sand shell in the chilled part is 3mm. , the thickness of the sand shell in the heat preservation part is 15mm.
[0035] 3. The sand box is heated with an infrared bottom radiation heating oven, wherein the heating temperature of the upper box is 200 °C, and the heating temperature of the lower box is between 170 °C, and the temperature of the upper box and the lower box are controlled by an electronic tem...
Example Embodiment
[0045] Example 2:
[0046] A method for producing a heat-resistant steel automobile exhaust pipe with an iron mold sand coating process:
[0047] 1. First analyze the profile and wall thickness characteristics of the automobile exhaust pipe, and preliminarily determine the chilling position in the casting.
[0048] 2. Adjust the gap between the mold and the sand box according to the chilling position of the casting, and then determine the thickness of the sand shell and the precise chilling position. The overall thickness of the sand shell is 10mm, and the thickness of the sand shell in the chilled part is 3mm. , the thickness of the sand shell in the heat preservation part is 15mm.
[0049] 3. The sand box is heated with an infrared bottom radiation heating oven, wherein the heating temperature of the upper box is between 220 °C and the heating temperature of the lower box is between 180 °C, and the temperature of the upper box and the lower box are both controlled by an e...
Example Embodiment
[0059] Example 3:
[0060] A method for producing a heat-resistant steel automobile exhaust pipe with an iron mold sand coating process:
[0061] 1. First analyze the profile and wall thickness characteristics of the automobile exhaust pipe, and preliminarily determine the chilling position in the casting.
[0062] 2. Adjust the gap between the mold and the sand box according to the chill position of the casting, and then determine the thickness of the sand shell and the exact chill position. The overall thickness of the sand shell is 8mm, and the thickness of the sand shell in the chilled part is 3mm. , the thickness of the sand shell in the heat preservation part is 12mm.
[0063] 3. The sand box is heated with an infrared bottom radiation heating oven, wherein the heating temperature of the upper box is between 180 °C and the heating temperature of the lower box is between 140 °C, and the temperature of the upper box and the lower box are both controlled by an electronic...
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