A double-head central hole grinding method and grinding machine

Abstract

The invention discloses a valve rod double-head center hole grinding method and grinding machine. The grinding method includes the steps that a first grinding center is used for being aligned with a first end center hole of a valve rod, and a second grinding center is used for being aligned with a second end center hole of the valve rod, and moves towards the first grinding center to clamp the valve rod; the first grinding center and the second grinding center rotate to set time at the same time; the second grinding center is made to move away from the first grinding center; and then the ground valve rod is taken down. According to the grinding method, double-end center holes of the valve rod are clamped and hung in the air due to the fact that the left grinding center and the right grinding center move oppositely, and no extra clamp is needed; and meanwhile, the left grinding center and the right grinding center perform grinding at the same time, and the matching precision that the double-head center holes affect the outer circle grinding cylindricity of the valve rod is guaranteed. The double-head center hole grinding machine is mainly used for grinding center holes in the two ends of the multi-path valve rod, and it is facilitated that when the outer circle of the valve rod is ground, the cylindricity can reach the requirement of 0.003-0.005 um.

Description

Technical field [0001] The invention relates to a double-head center hole grinding method and a grinding machine. Background technique [0002] The cylindrical grinding of the valve stem of the hydraulic multi-way valve has strict accuracy requirements for the cylindricity. [0003] The double-headed center hole is the positioning datum when the valve stem is in the cylindrical grinding process, and it needs to be ground in advance. [0004] The current grinding methods include pure manual grinding, conventional equipment auxiliary methods, and special center hole grinding equipment. These existing grinding methods have one thing in common, that is, stepwise grinding. After the workpiece is tightened, the center hole of one end of the valve stem is ground, and then the center hole of the other end is ground after meeting the requirements. [0005] The applicant, Changyuan Hydraulics, is a manufacturer specializing in the production of hydraulic parts. In the process of implementing t...

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Problems solved by technology

[0005] The applicant, Changyuan Hydraulics, is a professional manufacturer of hydraulic components. During the process of implementing the present invention, the inventor believes that the double-headed central hole of the valve stem can be ground in stages to meet the single beating requirement of the outer circle of the valve stem, but it is very difficult. It is difficult to ensure the double run-out requirement of the outer circle of the valve stem to the center holes at both ends, which may lead to the inability to completely grind out the outer circle of the valve stem

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