Casting process for high-strength and low-alloy chilling spheroidal graphite cast iron camshaft blanks
A high-strength low-alloy, nodular cast iron technology, applied in the direction of metal processing equipment, casting molds, casting mold components, etc., can solve the problems of slow dry sand cooling casting speed, affecting casting quality, complex process, etc., to achieve stress relief process, Good economic benefit, prolonging the effect of collapse time
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Embodiment 1
[0022] A casting process for a high-strength low-alloy chilled ductile iron camshaft blank, comprising the following steps:
[0023] a. Make the camshaft shell mold according to the specifications. The manufacturing process can be as follows: After the shell mold model is preheated to a certain temperature, the coated sand is dropped on the template, and after a period of time, the coated sand is bonded together, that is Can form a shell with a certain thickness;
[0024] B, make iron box, put the shell type that makes in the step a into iron box, described each iron box places 4-6 cover shell type, described every cover shell type and adjacent iron box inner wall, every cover There are gaps between the shells; among them, the size of the iron box is designed according to the size of the camshaft, and different numbers of shells are placed according to the size of the iron box, which can be 4 sets, 5 sets or 6 sets, of course it is also possible It is designed to match other ...
Embodiment 2
[0030] A casting process for a high-strength low-alloy chilled ductile iron camshaft blank, comprising the following steps:
[0031] a. Make the camshaft shell type according to the specifications;
[0032] B, make iron box, put the shell type that makes in step a into iron box, described each iron box places 4 cover shell types, described every cover shell type and adjacent iron box inner wall, every cover shell type gaps are provided between them;
[0033] c. Use iron shot to fill the above-mentioned gap, and completely cover the shell type, so that the sprue cup of the shell type is exposed, which is convenient for pouring molten iron; preferably, the diameter of the iron shot is 2.5mm;
[0034] d. Pour the molten iron from the sprue cup and fill the shell-shaped cavity to complete the pouring;
[0035] e. After 4 hours of heat preservation, clean up the iron shot in the iron box, and take out the camshaft casting to obtain the camshaft blank. The heat preservation time c...
Embodiment 3
[0040] A casting process for a high-strength low-alloy chilled ductile iron camshaft blank, comprising the following steps:
[0041] a. Make the camshaft shell type according to the specifications;
[0042] B, make iron box, put the shell type that makes in the step a into iron box, described each iron box places 6 cover shell types, described every cover shell type and adjacent iron box inner wall, every cover shell type gaps are provided between them;
[0043] c. Use iron shot to fill the above-mentioned gap, and completely cover the shell shape, so that the sprue cup of the shell shape is exposed, which is convenient for pouring molten iron; preferably, the diameter of the iron shot is 4mm;
[0044] d. Pour the molten iron from the sprue cup and fill the shell-shaped cavity to complete the pouring;
[0045] e. After keeping warm for 5 hours, clean up the iron shot in the iron box, and take out the camshaft casting to obtain the camshaft blank.
[0046] In this process, t...
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