Grinding tool for starting valve hole of diesel engine cylinder head

Abstract

The invention discloses a grinding tool for a starting valve hole of a diesel engine cylinder head. The grinding tool comprises a grinding main shaft, a spring, a pressure plate and a locking nut; the lower end of the grinding main shaft extends out of a grinding head in a radial direction; the lower end of the grinding head downwards extends out of a stud; a locking nut is screwed on the stud; a bottom conical ring surface of the grinding head is matched with a to-be-ground conical ring surface on the bottom of the starting valve hole; the spring is arranged on the middle part of the grinding main shaft in a sleeved manner; the bottom of the spring abuts against a spring supporting table shoulder; a pressure plate is arranged on the upper part of the grinding main shaft in a sleeved manner; the two ends of the pressure plate are fixedly arranged on a cylinder head settling table; and the top of the spring abuts against a lug boss at the lower side of the pressure plate. The grinding tool is simple in structure, is low in cost, is convenient to operate, and solves the problem that the bottom surface of an inclined deep hole cannot be ground by a machine tool; and moreover, the cylinder head does not need to be dismounted, and is specially put to a perpendicular position of the starting valve hole, so that processing time is greatly shortened, production efficiency is improved, and processing quality for the starting valve hole of the diesel engine cylinder head is greatly improved.

Description

technical field [0001] The invention relates to a grinding tool for a conical surface of a deep hole, in particular to a tool for grinding a conical surface of a deep hole of a cylinder head start valve of a medium-speed diesel engine, and belongs to the technical field of metal cutting. Background technique [0002] The cylinder head of a diesel engine is used to close the combustion chamber, on which are installed fuel injectors, exhaust valves, start valves and other components, which is one of the key parts of the diesel engine. The depth of the starting valve hole inclined downward from the top surface of the cylinder head reaches 400mm, and there is an annular cone surface with an inclination angle of 30° at the bottom. There are vibration lines and high points on the bottom cone surface, which leads to the incomplete fit between the pneumatic valve and the cone below, and the dimensional accuracy requirements cannot be well guaranteed. There is a serious air leakage p...

AI Technical Summary

Problems solved by technology

However, the grinding tool has a complex structure, high manufacturing cost, and can only be used for flat-bottomed holes with a depth of 200mm

Images