CN2664816Y - Cutter knife special for lathe - Google Patents

Abstract

The utility model relates to a special cutter of lathe, comprising a cutter body 1 and cutter head 2, the center part of a main cutting blade intersected by the front cutting face and the rear cutting face of flat type cutter is provided with an arc-shaped groove, the groove forms an arc-shaped front cutting face with an Alpha equal to minus 62 to minus 68 front angle, so that the main cutting blade forms a 3D cutting blade, thereby being easy to realize the automation, vibration prevention, smooth cutting, cutter deviation prevention, smooth chip removal, and that chips are uneasy to be locked and cutter blade is uneasy to be bumped, and simple grinding, convenient operation, no needing additional cutters, saving raw materials, performing cutting to larger diameter work piece.

Description

The special-purpose cutoff tool of lathe

Technical field:

The utility model relates to a kind of machining tool, particularly relates to the special-purpose cutoff tool of a kind of lathe.

Background technology:

At present, the cutoff tool work in-process that is applied in the field of machining need be caught up with cutter mostly, make production efficiency low, the waste raw material, cutoff tool is when carrying out work, because finished surface diameter variation, cause instantaneous cutting force to change, carry out in the process in processing, cutting edge is in semi-closed state, contact with workpiece all around, long and narrow because of cutter head again, tool stiffness is poor, and there is the gap in lathe middle carriage direction of feed, therefore is very easy to produce vibration and knife phenomenon, cause the improper damage of cutoff tool, also because existing cutoff tool cutter head is long and narrow, and cutter is when sharpening, cutter both sides front clearance can not be equal fully, auxiliary angle can not be equal fully, cause that two point of a knife places are stressed not to be waited, workpiece end face is easy to generate concave-convex curved surface during cut-out, influences the workpiece crudy.

Summary of the invention:

Technical problem to be solved in the utility model provides the special-purpose cutoff tool of a kind of lathe, this cutoff tool can not only solve vibration when cutting off workpiece, cutter draws inclined to one side problem, and can reduce workman's operation easier, boost productivity and the workpiece crudy, and easily be automated production, the technical scheme that the utility model adopted is the arc groove of main cutting edge central part sharpening that crosses at flat type cutoff tool rake face and back knife face, this groove forms the circular arc rake face of-62 degree～-68 degree anterior angles on cutter, thereby make main cutting edge form three-dimensional cutting edge, the radius R of groove formed arc on rake face=(1/6～1/7) bmm, b is the cutoff tool width, b=(0.5～0.6) √ Dmm, D is the diameter of workpiece to be machined, height h=(0.3～0.4) bmm of groove.

Cutoff tool running parameter after the improvement:

Cutter material: YT15

Workpiece material: medium carbon steel, medium carbon alloy steel

Cutting data:

Cutting speed v＜120m/min

Amount of feeding f=(0.03～0.06) mm/r

The abundant cutting fluid of annotating during cutting.

Action principle of the present utility model is as follows: cut off on lathe and add man-hour, vibration is mainly produced by the alternating force effect of vibrational system itself, so belong to self-excited vibration, the condition that hunting system is kept stable vibration is: in a vibration period, equal the energy that system damping consumes from iea through the energy of regulating system inputted vibration system, therefore for the self-excited vibration of cutting process, vibrational system is exactly a lathe---cutter---process system that workpiece forms, generation reason according to self-excited vibration, can increase the cutting damping as far as possible, cutter is subjected to two opposing force effects of major axes orientation at work simultaneously, cutter can deflection when two power equate, when two power do not wait, cutter will be subjected to big cutting force effect to push the less side of cutting force to, if apply the effect that an external force can be regulated and control two opposing forces of major axes orientation, make it to reach poised state, just can prevent cutter generation deflection, in addition, because tool orthogonal rake is-62 degree～-68 degree, make the central part chip deformation bigger, and other position chip deformation is less, and this just makes smear metal be forced to bending, and it is smooth and easy to make it chip removal.

Compared with prior art, the utlity model has following advantage:

1., easily be automated.

2., lathe tool is provided with-62 degree～68 degree anterior angles, makes main cutting edge form three-dimensional shape, can prevent vibration, makes stable cutting.

3., can prevent that cutter from drawing partially.

4., smooth and easy, the card bits and difficult generation of forging a knife of chip removal.

5., sharpening is simple, easy to operate.

6., need not catch up with cutter, the saving raw material.

7., can cut off the big workpiece of diameter.

Description of drawings:

Accompanying drawing 1 is the utility model front view

Accompanying drawing 2 is the utility model vertical views

Accompanying drawing 3 is the utility model left views

Accompanying drawing 4 is C enlarged drawings in the accompanying drawing 2

Accompanying drawing 5 is A enlarged drawings in the accompanying drawing 1

Accompanying drawing 6 is B enlarged drawings in the accompanying drawing 3

Specific embodiments:

The utility model comprises cutoff tool cutter hub 1, cutter head 2, the arc groove 5 of main cutting edge central part sharpening that crosses at flat type cutoff tool rake face 3 and back knife face 4, this groove forms the circular arc rake face 6 of α=-62 degree～-68 degree anterior angles on cutter, thereby make main cutting edge form three-dimensional cutting edge, the radius R of groove formed arc on rake face=(1/6～1/7) bmm, b is the cutoff tool width $b=(0.5~0.6)\sqrt{D}\mathrm{mm}$ , D is the diameter of workpiece to be machined, height h=(0.3～0.4) bmm of groove.

Claims (1)

1, the special-purpose cutoff tool of a kind of lathe, comprise cutoff tool cutter hub 1, cutter head 2, it is characterized in that at flat type cutoff tool rake face (3) and the arc groove of main cutting edge central part sharpening (5) that crosses of back knife face (4), this groove forms the circular arc rake face (6) of α=-62 degree～-68 degree anterior angles on cutter, thereby make main cutting edge form three-dimensional cutting edge, the radius R of groove formed arc on rake face=(1/6～1/7) bmm, b is the cutoff tool width, b=(0.5～0.6) √ Dmm, D is the diameter of workpiece to be machined, height h=(0.3～0.4) bmm of groove.

Images