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Method for machining steel piston ring by using profiling rod

A technology of piston rings and profiling rods, which is applied in metal processing and other directions, and can solve the problems of poor conformity of free-state molding lines and low yield

Active Publication Date: 2007-10-24
NANJING FAYN PISTON RING
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  • Abstract
  • Description
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the conformity between the steel piston ring processed by the existing steel piston ring processing technology and the theoretically calculated free state profile is poor, and the yield rate is low

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  • Method for machining steel piston ring by using profiling rod
  • Method for machining steel piston ring by using profiling rod

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Embodiment Construction

[0012] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0013] 1. Calculate the free state profile according to the pressure distribution curve of the outer circle of the steel piston ring to be processed, and then process the profiling cam according to the free state profile.

[0014] Such as DA462 steel gas ring, its outer circle pressure is equal pressure (P=1.9kgf / cm 2 ), the flatness of the profiling rod profiling cam is Δ=1.14. DA465Q steel gas ring, its outer circle pressure is equal pressure (P=1.9kgf / cm 2 ), the flatness of the profiling rod profiling cam is Δ=1.517. Zhendong φ53.7 steel gas ring has an equal pressure on its outer circle (P=1.9kgf / cm 2 ), the flatness of the profiling rod profiling cam is Δ=1.09.

[0015] 2. Determine the length and diameter of the profiling rod according to the inner circle shape of the steel piston ring in the free state, and process the profiling rod....

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Abstract

The present invention relates to method of machining steel piston ring with profiling rod. The machining process includes sleeving steel ring with cut onto a profiling rod before setting treatment, and the profiling rod has outside size the same as the inner circle of the calculated steel piston ring under free state. The setting treatment is to set the steel piston ring on the profiling rod inside a furnace, raise the temperature slowly to 500-700 deg.c, maintain for 2-4 hr before taking out, and cool in air to room temperature. The present invention has simple technological process and easy operation, and the machined steel piston ring is well coincided with the theoretically calculated one under free state.

Description

technical field [0001] The invention relates to a processing method for a steel piston ring. Background technique [0002] Steel piston rings are evolved from traditional cast iron piston rings. Due to their high strength, simple processing technology and good performance, they are developing rapidly. It is difficult to control the conformity between the steel piston ring and the theoretically calculated free state line after it is finalized. At present, there are two main methods for processing steel piston rings. [0003] The first one is the steel piston ring automatic ellipse (free state type line) round machine produced by Japan's NPR company, which can be directly wound into an elliptical steel piston ring under the control of the numerical control system, so as to obtain the required steel piston ring. The free state profile of the ring. However, the equipment is expensive, costing nearly 3 million yuan for one piece of equipment, and it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/06B23P25/00
Inventor 张昭华张仪石建明胡怀纲陈真荣李丽
Owner NANJING FAYN PISTON RING
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