Superfinishing process and equipment for the valve stem part of the engine
A technology for valve stems and engines, which is applied in superfinishing machines, metal processing equipment, manufacturing tools, etc. It can solve the problems of sacrificing efficiency and limited roughness improvement, so as to improve processing efficiency, reduce production costs, and prolong the life of grinding wheels Effect
Active Publication Date: 2017-07-07
伊顿工业(济宁)有限公司
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Problems solved by technology
The current grinding method is the centerless grinding method. Specifically, the valve is driven by the guide wheel to rotate, the blade provides support for the valve, and the grinding wheel also rotates to grind the valve stem; the disadvantage of this processing is that For products with high roughness requirements, because of the need to meet the roughness requirements, a finer-grained grinding wheel is used in the final grinding and the grinding wheel is trimmed to a finer way to process the product. Although this method is not good for the valve stem The roughness of the valve stem has been improved but the efficiency of product processing has been sacrificed, and the increase in roughness is limited; the roughness of the valve stem processed by this traditional method can generally reach Ra0.25, and the roundness is 0.003-0.004
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[0026] Those skilled in the art should understand that the content discussed herein is only a description of exemplary embodiments, and is not intended to limit the broader solutions of the present invention.
[0027] figure 1 It shows a schematic structural view of the equipment for implementing the valve stem superfinishing process of the present invention. As shown in the figure, the equipment includes a frame (not shown), a feeding mechanism 1, a discharging mechanism 2, a whetstone mechanism 3, a linear drive device that drives the whetstone mechanism 3 to reciprocate and linearly move, and a rotary device that drives the valve 4 to perform rotary motion. The driving device 5 and the pressure applying mechanism 6 for controlling and adjusting the pressure applied by the oilstone to the valve stem to be processed.
[0028] In this embodiment, the rotary drive device 5 that drives the valve 4 to rotate includes two backup rollers 5a and 5b, which are driven in a centerless...
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Abstract
The invention provides a superfinishing technology for an air valve rod part of an engine. The superfinishing technology comprises the following steps of mounting an air valve to be subjected to superfinishing on a rotary driving mechanism; driving the air valve to rotate through the rotary driving mechanism; moving oilstone to a position above the air valve, pressing the oilstone by a pressing mechanism until the oilstone is in contact with the air valve rod part, and keeping certain pressure; during pressurization, applying grinding lubricating oil to a finishing surface of the air valve rod part; during rotation of the air valve, driving the oilstone to do reciprocating movement for at least twice at a speed along the center line direction of the air valve rod part under the pressure. The invention also provides superfinishing equipment for the air valve rod part of the engine. According to the superfinishing technology and the superfinishing equipment, the roughness of the air valve rod part easily reaches Ra0.12, and the roundness can be improved by 0.001-0.002, namely the roundness of the air valve rod part finally reaches 0.002-0.003.
Description
technical field [0001] The invention relates to the field of machining engine valves, in particular to a superfinishing process for a valve stem and superfinishing equipment for the valve stem. Background technique [0002] The valve is a part of the engine's valve mechanism, which ensures that the engine is opened and closed on time during the running process, and the fresh combustible mixture is input into the cylinder, and the exhaust gas after combustion is discharged from the cylinder in time. The valve is generally composed of a head, a rod and a tail, and the rod is an important part of the valve. In an internal combustion engine, the valve stem and the valve guide form a pair of friction pairs. Under the condition of not getting good lubrication, it bears thousands of repeated frictions per minute, and its working condition is extremely bad. [0003] According to the working characteristics of the valve stem, higher requirements are put forward for its precision an...
Claims
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IPC IPC(8): B24B33/04B24B33/08B24B33/10
CPCB24B1/00B24B35/00
Inventor 丁国强
Owner 伊顿工业(济宁)有限公司