Once-forming valve grinding machine

Abstract

The invention discloses a once-forming valve grinding machine. The once-forming valve grinding machine comprises a lathe as well as a workpiece main shaft and a grinding main shaft which are rotatably supported on the lathe and are parallel to each other, wherein the workpiece main shaft is rotatably supported on the lathe through a workpiece main shaft base and a feeding workbench; a spring chuck is arranged in an inner hole of the workpiece main shaft; the spring chuck is connected with a pulling tube drive device through a pulling tube; a positioning rod is spiced in a pulling tube; the rear end of the positioning rod is connected with a discharge air cylinder; a positioning air cylinder is further arranged on the workbench; the positioning air cylinder is in one-way driving connection with the positioning rod; a valve centering supporting mechanism is arranged on the workbench; a centering block on the valve centering supporting mechanism and the grinding wheel main shaft are oppositely arranged at the two sides of the workpiece main shaft; an automatic feeding device, an automatic loading device and a discharge conveying device are further arranged on the lathe. The once-forming valve grinding machine can be suitable for requirements of valve once-forming grinding processing, is high in degree of automation, and can guarantee positioning precision; and a processed valve has a determined position state in a conveying process.

Description

technical field [0001] The invention relates to a metal cutting machine tool, in particular to a valve grinding machine tool. Background technique [0002] The valve is an important part of the engine, and the quality of the valve plays a vital role in ensuring the working efficiency of the engine. In order to ensure the processing accuracy of the valve, the outer diameter of the valve disc, the disc cone surface, the umbrella, the large end surface and other surfaces on the valve must be finished by grinding. The conventional valve grinding process of the above-mentioned surfaces requires multiple processes. finished, the processing efficiency is not high, the workpiece needs to be clamped many times, and the processing accuracy is not easy to guarantee, and in the valve grinding machine of the prior art, the valve to be ground is usually axially positioned by the positioning rod, and the processing is completed Finally, the positioning rod is used to eject the unloading m...

AI Technical Summary

Problems solved by technology

In order to ensure the processing accuracy of the valve, the outer diameter of the valve disc, the disc cone surface, the umbrella, the large end surface and other surfaces on the valve must be finished by grinding. The conventional valve grinding process of the above-mentioned surfaces requires multiple processes. finished, the processing efficiency is not high, the workpiece needs to be clamped many times, and the processing accuracy is not easy to guarantee, and in the valve grinding machine of the prior art, the valve to be ground is usually axially positioned by the positioning rod, and the processing is completed Finally, the positioning rod is used to eject the unloading material. The positioning rod is driven by the cylinder. The valve to be processed is clamped by the spring chuck, and the spring chuck is pulled backward by the clamping cylinder to play a clamping role. During this process, the positioning rod It will also be affected by the clamping tension of the processed valve, so that the positioning rod will have a tendency to shift, which will easily cause the loss of positioning accuracy and affect the processing accuracy of the valve; and in general, after the grinding of the valve is completed Finally, the valve is ejected by the jacking cylinder, and it falls into the discharge conveying mechanism to convey it out. The commonly used conveying mechanism is a flat belt conveying mechanism. The position of the valve cannot be determined when conveying and discharging, and the operation of the subsequent process is inconvenient.

In addition, in order to improve the working efficiency of the valve processing, it is hoped that the grinding of the above-mentioned surfaces can be completed at the same time through the forming grinding wheel in one clamping process, but during the one-time forming grinding process of the above-mentioned surfaces of the valve, the grinding force will increase. It is very large. The diameter of the valve stem as the clamping point of the workpiece to be ground is relatively small, so it is impossible to bear the action of grinding force. The valve will be bent and deformed during the machining process, and the machining accuracy cannot be guaranteed. If the amount of cutting is reduced, the production efficiency cannot be improved, and the significance of one-time molding processing will be lost.

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