Special CNC (computer numerical control) machine tool for tappet drilling

Abstract

The invention discloses a special CNC (computer numerical control) machine tool for tappet drilling. The machine tool comprises a tool body and a control box, and is characterized in that a base is fixedly connected with the upper end of the tool body, a workpiece groove is formed in the middle of the base, a plurality of transverse supporting columns for supporting a workpiece are arranged at thelower end of the workpiece groove, and both sides and the middle of each supporting column are hollowed out; a stop block is fixed at one end of the workpiece groove, and a workpiece clamping block is arranged at the other end of the workpiece groove and is fixed at a telescopic end of a clamping oil cylinder; fixing blocks are arranged on two sides of the workpiece groove, and drilling holes inclined to the workpiece are formed in the fixing blocks; drilling devices are arranged two ends of each drilling hole respectively, and each drilling device comprises a two-way oil cylinder fixed at the upper end of the base; a drilling knife matched with the corresponding drilling hole is fixedly connected with one end of a piston rod of each two-way oil cylinder, and a motor for driving the piston rod to rotate is arranged at the other end of the corresponding two-way oil cylinder. The machine tool has the beneficial effects that two-way simultaneous drilling of the workpiece is realized, accurate positioning of the workpiece is ensured, and machining precision of the workpiece is ensured.

Description

technical field [0001] The invention relates to a machine tool, in particular to a special numerical control machine tool for tappet drilling. Background technique [0002] The valve tappet is an important part of the engine gas distribution system. During the working process of the engine, whether its movement and rotation are flexible will affect the performance of the engine to a certain extent. [0003] The common valve lifters include straight cylinder type, mushroom type, waisted type or other special shapes, and each valve lifter has at least one oil guide hole and oil return hole. The working state of the valve lifter is to move up and down or rotate, and the force is the sliding friction between the lifter and the lifter. Whether the action is flexible has a lot to do with the size of the contact surface and whether the lubrication is sufficient. At the same time, the top surface of the tappet and the top surface of the tappet rotate at a high speed, and the air g...

AI Technical Summary

Problems solved by technology

[0004] At present, the machine tool used to process the tappets is manually drilled by the drilling mold. It is difficult to guarantee the error angle of the drilling mold, the aperture control is not good, and the uneven force during the drilling process causes the drill to break on the workpiece, resulting in a high scrap rate.

Moreover, manual drilling is slow. After one hole is drilled, another hole can be drilled. The two holes cannot be drilled at the same time. Because the mold is rotated, the size and angle are not guaranteed, and the efficiency is low.

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