CN202180244U

CN202180244U - Rotary-cut combined cutter

Info

Publication number: CN202180244U
Application number: CN2011202646547U
Authority: CN
Inventors: 华斌; 李海军; 刘少卿
Original assignee: Jiangling Motors Corp Ltd
Current assignee: Jiangling Motors Corp Ltd
Priority date: 2011-07-26
Filing date: 2011-07-26
Publication date: 2012-04-04
Anticipated expiration: 2021-07-26

Abstract

The utility model relates to the technical field of cutting, and particularly relates to a rotary-cut combined cutter which comprises a cutter rod and more than three cutting edges distributed at the exterior of the cutter rod, wherein a guiding groove is arranged between each two cutting edges, the cutting edges are not parallel with the cutter rod, and the cutting edges sequentially surround at the periphery of the cutter rod at the same interval. By adopting the rotary-cut combined cutter, the cutter does not need to be replaced, and machining can be carried out normally even if tipping of one cutting edge occurs so as not to affect the machining. In the rotary-cut combined cutter, as the cutting edges are arranged in a step shape and cut into a workpiece respectively, so that the uniform change of the cutting force is ensued, the cutter cannot be deviated and can be dragged to the direction with too much allowance, and a hole wall cannot be scrapped in the machining process.

Description

The rotary-cutting type compound tool

Technical field

The utility model relates to the cutting technology field, specifically, relates to a kind of rotary-cutting type compound tool.

Background technology

The blank that pre-manufactured hole is much arranged and inclined hole is arranged is arranged on the modern production part, and surplus generally surpasses 4mm, can cause the skew of cutter in the processing; The general use bored expansion hinge technology, and three kinds of cutters are used in tool changing three times; Three quick change drill bushings; Make that the efficient of processing is very low, and the circularity after the part processing is arranged, the phenomenon that linearity is not easy to guarantee.

The utility model content

The purpose of the utility model is to overcome the deficiency of prior art, and a kind of rotary-cutting type compound tool is provided.

In order to realize the purpose of the utility model, the technical scheme that the utility model adopts is:

A kind of rotary-cutting type compound tool comprises the blade more than three that knife bar is outside with being distributed in knife bar, is gathering sill between two blades, and the axis of said blade and knife bar is not parallel, and each blade spacing equates to be looped around around the knife bar successively.

The tangent line of said blade axis and the axis angle of knife bar are 5---15 °.

The free end of said blade is stepped.

Said blade is provided with six and be distributed in around the knife bar.

Between said gathering sill and the blade for seamlessly transitting.

Free-ended feed place of said blade has the inclination angle.

The beneficial effect of the utility model is:

1. compare with general processing, use the cutter of the utility model, can practice thrift process time more than 50%; Simultaneously, do not need tool changing, practice thrift two cutters, instruments such as two cover drill bushings improve working (machining) efficiency greatly, are that general cutter is irreplaceable;

2., can not influence processing even there is the blade generation tipping can normal process yet;

3. the free end of blade is stair-stepping, progressively cuts workpiece respectively, and guarantees the even variation of cutting force, prevents that main shaft is stuck;

4. free-ended feed place of blade has the inclination angle, can eccentric part extremely be reduced to the influence of cutter ultimate attainment, and the guiding that cutter is produced direction: not only can not make tool offset, also can be with cutter to the many direction tractions of surplus spy;

Between gathering sill and the blade for seamlessly transitting; Having guaranteed in the process not can the scratch hole wall; And when High-speed machining and cutting fluid form the form of a hydrodynamic bearing; Make the targeting part of cutter can not produce friction, can play the effect of damping, can prevent to make the roughness in hole to reduce again with the friction of workpiece with workpiece.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the A-A cutaway view Amplified image of Fig. 1;

Fig. 3 is the local enlarged diagram of the I portion of Fig. 1.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further specified:

Embodiment: referring to Fig. 1, Fig. 2, Fig. 3.

A kind of rotary-cutting type compound tool comprises that between knife bar 12, two blades 2 of the blade more than three outside with being distributed in knife bar 1 be gathering sill 4, and the axis of said blade 2 and knife bar 1 is not parallel, and each blade 2 spacing equates to be looped around around the knife bar 1 successively.

The tangent line of said blade 2 axis and the axis angle of knife bar 1 are 5---15 °.

The free end of said blade 2 is stepped.

Preferably, said blade 2 is provided with six and be distributed in around the knife bar 1, and present embodiment adopts the version of preferred six blades.

Between said gathering sill 4 and the blade for seamlessly transitting.

Said blade 2 free-ended feeds place have inclination angle 3.

Existing is example to process a concrete workpiece, and the use principle of the utility model is described:

After the workpiece to be processed machine-shaping, basic parameter is bottom outlet Φ 32, the eccentric 2mm in hole, length 75 mm, material QT400-15-GB1348.

Procedure of processing of the prior art: bore bottom outlet Φ 35, parameter is 200 rev/mins, feeding 100mm/ minute; 45 seconds consuming time, tool changing 5 seconds; Reamer is worked into Φ 39.5, and parameter is 200 rev/mins, feeding 150mm/ minute; 35 seconds consuming time, tool changing 5 seconds; It is 200 rev/mins that reamer is worked into Φ 40 parameters, feeding 150mm/ minute; 33 seconds consuming time, tool changing 5 seconds; Amount to 128 seconds process times.

Adopt the spiral step angle of throat tool of the utility model, its basic step is:

The first step is connected blade with knife bar, clamp, and location confirmation is carried out in cutter blade axle center.

Second step, under effective cutting fluid external cooling (in cold) situation, by linear velocity per minute 40-60 rice, the processing of the parameter of feeding per minute 150mm, 36 seconds process times; The processing back aperture reaches the machining accuracy of Φ 40H8 (+0.049/0).The processing life-span: in the accuracy rating of element precision, suitably strengthen tool diameter, can process 7000 not tool changing at 0-0.2mm.

Compare with general processing, use the cutter of the utility model can practice thrift 92 second process time, about 72% process time; Simultaneously, practice thrift two cutters, instruments such as two cover drill bushings improve working (machining) efficiency greatly, are that general cutter is irreplaceable.

In this embodiment, even have the blade generation tipping can normal process, can not influence processing at six blades yet;

Blade 2 is stair-stepping, cuts workpiece respectively, and guarantees the even variation of cutting resistance, prevents that main shaft is stuck;

The inclination angle 3 of wide-angle can be reduced to eccentric part extremely ultimate attainment to the influence of cutter, and cutter is produced the guiding of direction: not only can not make tool offset, and also can be with cutter to the many direction tractions of surplus spy;

Between gathering sill 4 and the blade 2 for seamlessly transitting; Having guaranteed in the process not can the scratch hole wall; And when High-speed machining and cutting fluid form the form of a hydrodynamic bearing; Make the targeting part of cutter can not produce friction, can play the effect of damping, can prevent to make the roughness in hole to reduce again with the friction of workpiece with workpiece; Compare with general processing: this utility model can be practiced thrift 92 second process time, about 72% process time.

What the embodiment of the utility model announced is preferred embodiment; But be not limited thereto, those of ordinary skill in the art is very easily according to the foregoing description; Understand the spirit of the utility model; And make different amplifications and variation, but only otherwise break away from the spirit of the utility model, all in the protection domain of the utility model.

Claims

1. a rotary-cutting type compound tool comprises the blade more than three that knife bar is outside with being distributed in knife bar, is gathering sill between two blades, and it is characterized in that: the axis of said blade and knife bar is not parallel, and each blade spacing equates to be looped around around the knife bar successively.

2. rotary-cutting type compound tool according to claim 1 is characterized in that: the tangent line of said blade axis and the axis angle of knife bar are 5---15 °.

3. according to claim 1 or the described rotary-cutting type compound tool of claim 2, it is characterized in that: the free end of said blade is stepped.

4. according to claim 1 or the described rotary-cutting type compound tool of claim 2, it is characterized in that: said blade is provided with six and be distributed in around the knife bar.

5. according to claim 1 or the described rotary-cutting type compound tool of claim 2, it is characterized in that: between said gathering sill and the blade for seamlessly transitting.

6. according to claim 1 or the described rotary-cutting type compound tool of claim 2, it is characterized in that: free-ended feed place of said blade has the inclination angle.