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Novel bending drill

A new type of drill arm technology, applied in the direction of boring/drilling, drilling/drilling equipment, tool joints, etc., can solve the problems of small clamping force of the drill bit, swinging of the drill bit, instability, etc., and achieve the effect of reducing thickness

Inactive Publication Date: 2017-02-22
SHANDONG QILU ELECTRIC MOTOR MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing folding drills have a small holding force on the drill bit during the drilling process, and are unstable. The drill bit often swings and wobbles during the working process, which leads to large errors in the processed holes and serious Affect the assembly quality and assembly progress of the blade

Method used

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Such as figure 1 , 2 As shown, the present invention provides a new type of folding drill, its structure includes, a fixed base 1, a drill arm 2 vertically arranged on the fixed base 1, a rotatably arranged drill arm 2, and is used to clamp a drill bit 26 The clamping mechanism, the transmission mechanism, and the driving mechanism for driving the clamping mechanism to rotate. Such as figure 2 As shown, the clamping mechanism includes a rotating shaft 7 horizontally rotatably arranged on the drill arm 2 , a collet 8 , and a screw plunger 9 . The collet 8 includes an annular barrel 10, on which there are several locking slits 11 along its axis, the locking slits 11 are evenly arranged around the barrel 10, and the two ends of the barrel 10 are respectively provided with front The radii of the conical surface 12 and the rear...

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Abstract

The invention discloses a novel bending drill. The novel bending drill comprises a fixed base, a drilling arm, a clamping mechanism, a rotation mechanism and a driving mechanism, wherein the clamping mechanism is rotatably arranged on the drilling arm and is used for clamping a drill bit; the driving mechanism is used for driving the clamping mechanism to rotate; multiple locking joints are arranged on a spring clip; during use, the spring clip can generate plastic deformity, can clasp the drill bit effectively, and has large clasping force; and the size of the part, which is clasped, of the drill bit is long, so that the drill bit cannot swing or shift under the effect of the spring clip during drilling, and a hole body with higher precision can be drilled.

Description

technical field [0001] The invention relates to the technical field of steam turbines, and mainly relates to a new type of turning drill. Background technique [0002] During the assembly process of steam turbine rotor blades, when assembling the last blade (final blade) of each stage impeller, it is necessary to process locking pin holes at the blade root. Because the distance between the impellers of each stage is very narrow, a special folding method must be used. for processing. However, the existing folding drills have a small holding force to the drill bit during the drilling process and are unstable. The drill bit often swings and wobbles during the working process, which leads to large errors in the processed holes and serious The assembly quality and assembly progress of the blade are affected. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a new type of folding drill with simple structure, convenient...

Claims

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Application Information

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IPC IPC(8): B23B41/00B23B51/12
CPCB23B41/00B23B51/12B23B51/123
Inventor 毕玉洁薛俊富杨槐朱健健姜志强
Owner SHANDONG QILU ELECTRIC MOTOR MFG