CN201055917Y

CN201055917Y - Slot cutting device for slender hole

Info

Publication number: CN201055917Y
Application number: CNU2007200393773U
Authority: CN
Inventors: 刘元华
Original assignee: Yangdong Co Ltd
Current assignee: Yangdong Co Ltd
Priority date: 2007-06-07
Filing date: 2007-06-07
Publication date: 2008-05-07
Anticipated expiration: 2017-06-07

Abstract

The utility model provides a slot cutting device for slender holes, includes cutter arbor and tool bit, and characterized by cutter arbor periphery is equipped with eccentric guide pin bushing, and both become little clearance normal running fit to be equipped with positioning mechanism, guide pin bushing excircle diameter slightly is less than work piece hole aperture, the eccentricity e ═ R-H of guide pin bushing hole central line and excircle face central line, wherein R is for treating processing ring channel radius, H is the distance of tool bit top to cutter arbor central line, and the one end that the tool bit was not adorned to the cutter arbor is equipped with the handle. The utility model is used for processing the annular groove in the slender hole on the workpiece, and the rigidity of the cutter bar is enhanced due to the guide sleeve, thereby avoiding and reducing deformation and vibration and improving the processing quality; because the cutter arbor has the eccentricity with the guide pin bushing, rotate the cutter arbor to different positions, can make the tool bit advance and retreat the work piece smoothly and carry out the grooving processing, convenient operation, production efficiency is high.

Description

The elongated hole groove-cutting device

Technical field

The utility model relate to a kind of in the workpiece endoporus processing unit (plant) of cutting cannelure, particularly at the groove-cutting device of elongated hole.

Background technology

Run into the part that has annular groove in elongated hole through regular meeting in machining, because the aperture is little, knife bar is elongated, poor rigidity, and knife bar is yielding during cutting, produces vibration, influences crudy and efficient, sometimes even can't process.

The utility model content

The technical problems to be solved in the utility model provides and a kind ofly can improve crudy and efficient, and the easy to operate elongated hole groove-cutting device that is used for processing cannelure in the workpiece elongated hole.

The technical solution of the utility model is in fact: the elongated hole groove-cutting device comprises knife bar and is contained in the cutter head of knife bar one end, its improvements are that the periphery of knife bar is provided with eccentric guide pin bushing, eccentric distance e=the R-H of eccentric guide pin bushing inner hole centreline and its periphery center line, R is a cannelure bottom land place radius of a circle in the workpiece hole in the formula, H is the distance of cutter head top to the knife bar center line, knife bar becomes little gap to be rotatably assorted with eccentric guide pin bushing, and detent mechanism is arranged between the two.

The end that above-mentioned knife bar is unkitted cutter head stretches out outside the eccentric guide pin bushing, and this end is provided with handle; Described detent mechanism is a resilient key---locating hole mechanism.

The utility model is by being provided with eccentric guide pin bushing in the knife bar periphery, the guide pin bushing external diameter is slightly less than workpiece endoporus aperture, adds the man-hour guide pin bushing and stretches in the workpiece hole with knife bar, and the rigidity of elongated knife bar is strengthened greatly, avoid and reduce the distortion and the vibration of knife bar, thereby improve crudy; Because there are eccentric distance e in guide pin bushing inner hole centreline and periphery center line, rotate knife bar to diverse location, can make cutter head enter endoporus smoothly and cut groove processing, set e=R-H, and control the circumferential and axial position of knife bar well by detent mechanism, the disposable accurate processing of cannelure is put in place, easy to operate, the production efficiency height.

Description of drawings

View when Fig. 1 enters the workpiece endoporus for the utility model;

Fig. 2 cuts the view that groove adds man-hour for the utility model;

Fig. 3 be among Fig. 1 A to schematic diagram;

Fig. 4 be among Fig. 2 B to schematic diagram.

The specific embodiment

Consult accompanying drawing, the periphery of knife bar 3 is provided with eccentric guide pin bushing 4, and both become little gap to be rotatably assorted, preferred H7/h8, and guide pin bushing one end is provided with resilient key 5, and there is locating hole the knife bar corresponding position.All stretch out outside the guide pin bushing at the knife bar two ends, and an end is equipped with cutter head 2, and the other end is provided with handle 6.The external diameter of eccentric guide pin bushing 4 is slightly less than the diameter of bore of workpiece 1, and the center of guide pin bushing periphery overlaps with workpiece endoporus center during clamping, and when knife bar, guide pin bushing entered or withdraw from the workpiece endoporus, cutter head was in 1 ' position, at this moment H-e＜R _{The hole}, wherein H arrives the knife bar distance between center line for the cutter head top, and e is the eccentric throw of eccentric guide pin bushing endoporus and periphery, R _{The hole}Be pore radius in the workpiece; When handle rotated half cycle, cutter head forwarded 2 ' position to gradually from 1 ' position, forwards 3 ' position more gradually to, and workpiece just can be processed cannelure to required size by the rotation of the outer direction of arrow, at this moment, H+e=R, wherein R is a cannelure bottom land place radius of circle.

Claims

1. elongated hole groove-cutting device, comprise knife bar and the cutter head that is contained in knife bar one end, the periphery that it is characterized in that knife bar is provided with eccentric guide pin bushing, the eccentric throw (e)=(R)-(H) of eccentric guide pin bushing inner hole centreline and its periphery center line, (R) is cannelure bottom land place radius of a circle in the workpiece hole in the formula, (H) be the distance of cutter head top to the knife bar center line, knife bar becomes little gap to be rotatably assorted with eccentric guide pin bushing, and detent mechanism is arranged between the two.

2. by the described elongated hole groove-cutting device of claim 1, it is characterized in that the end that described knife bar is unkitted cutter head stretches out outside the eccentric guide pin bushing, this end is provided with handle.

3. by the described elongated hole groove-cutting device of claim 1, it is characterized in that described detent mechanism is a resilient key---locating hole mechanism.