A flexible, fast-changing, combined injector nozzle hole precision drilling fixture

Abstract

The invention relates to the technical field of drilling processing auxiliary equipment, in particular to a flexible, fast-changing, combined precision drilling jig for injection nozzle holes, including a base, the angle plate and the base are connected by a slider, and the sliding base has a The chute is locked with the angle plate through bolts. The sliding base is fixedly connected to the supporting column, a pawl is installed on the supporting column through a fixed shaft, the counterweight is installed on the pawl, the pawl slot is combined with the indexing ratchet slot, and the indexing ratchet is connected to the indexing ratchet through the sliding key. The rotating main shaft is fixed circumferentially, and the indexing ratchet is axially locked with the rotating main shaft through a lock nut. The rotating main shaft is connected with a replaceable positioning mandrel, and the workpiece is locked on the replaceable positioning mandrel through a compression nut. The invention can solve the outstanding problems of many fixtures, difficult management and high manufacturing cost in the current fuel injector manufacturing enterprises, can greatly reduce the product manufacturing cost, improve the on-site management level, and can also be popularized and applied in the same industry.

Description

technical field [0001] The invention relates to the technical field of drilling processing auxiliary equipment, in particular to a flexible, fast-changing, combined precision drilling fixture for spray holes of fuel injectors. Background technique [0002] The fuel injection nozzle assembly for marine propulsion and power generation diesel engine and locomotive generator set power is one of the key and precision assembly parts of diesel engine fuel injection system. It is composed of needle valve body and needle valve pairing. There are many series, large differences in specifications and appearance structures, and small batches. Product performance indicators directly affect the fuel consumption rate, emission indicators and reliability of diesel engines. The key elements of the design, the tolerance of the diameter of the nozzle hole is 0.005mm, the tolerance of the angle of the nozzle hole is ±1°, the number of nozzle holes covers 4 to 12, and the diameter of the hole is ...

AI Technical Summary

Problems solved by technology

In the process of product research and development and production, EDM, micro-hole high-speed drilling and other processes can be used for nozzle hole processing. EDM technology can ensure the geometric shape and technical index requirements of the product, but most of the equipment is imported from abroad, and the equipment and electrode wire Expensive, high manufacturing cost, low production efficiency

Using high-speed drilling technology, generally according to the product structure requirements, a set of special drilling fixtures are designed for one product, resulting in various types and specifications of fixtures, difficult fixture management, high fixture maintenance costs and product manufacturing costs.

[0003] The fuel injection nozzle assembly for marine propulsion and power generation diesel engine and locomotive generator set power is one of the key and precision assembly parts of diesel engine fuel injection system. Due to the limitation of industry attributes, there are many types of products, many series, and differences in specifications and appearance structures. Large and small batches, so when the production enterprise adopts high-speed drilling process, according to the product structure, a set of special drilling fixtures are designed for each product. There are many types and specifications of fixtures, the difficulty of fixture management is intensified, and the storage area occupies a large area. , the difficulty of on-site management increases, and the cost of fixture maintenance and product manufacturing is relatively high

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