Input valve requirements after polishing
① flash diameter small of valve head, a thin flash with uniform or low pressure resistance
② Total thickness of head deviation no more than 0.2 mm;
③ Squareness of stem is no more than 0.8 mm
④ Runout from head to stem is no more than 1.8 mm;
Key technical standard of straightening machine
1. Input valve will meet the requirements and specification at room temperature, and the qualified rate can meet above 90%;
2. If input valve stem squareness in more than 1 mm, runout of head to stem is more than 1.5 mm, flash is large and irregular, non-uniform tempering hardness, head cast thickness uneven,The head and stem concentric deviation caused by excessive wear of the head die,Above qualified rate will be deviated.
3. Dent depth of stem is no more than 0.05mm, no damage ( flaw detection ).
Input valve requirements after polishing
① flash diameter small of valve head, a thin flash with uniform or low pressure resistance
② Total thickness of head deviation no more than 0.2 mm;
③ Squareness of stem is no more than 0.8 mm
④ Runout from head to stem is no more than 1.8 mm;
Key technical standard of straightening machine
1. Input valve will meet the requirements and specification at room temperature, and the qualified rate can meet above 90%;
2. If input valve stem squareness in more than 1 mm, runout of head to stem is more than 1.5 mm, flash is large and irregular, non-uniform tempering hardness, head cast thickness uneven,The head and stem concentric deviation caused by excessive wear of the head die,Above qualified rate will be deviated.
3. Dent depth of stem is no more than 0.05mm, no damage ( flaw detection ).
