CN103394761A - Combined cutter and pipe cutting method - Google Patents

Abstract

The invention discloses a combined cutter which comprises a first blade and a second blade which operate alternatively. Sawteeth for scratching pipe fittings are arranged on the first blade. One end of the second blade is a cutting end for penetrating breakages of the pipe fittings and cutting off the pipe fittings. The cutting end is in the shape of a peach heart tip. The first blade is perpendicularly arranged while the second blade is horizontally arranged. Two blades are combined and cooperate with each other to cut off the pipe fittings, so that processing accuracy is improved, production cost is reduced, cutting-off time is shortened, pipe cutting noise is reduced, and generation of scrap iron during pipe cutting is reduced.

Description

Combined knife and Pipe Cutting method

Technical field

The invention belongs to machine tooling cutter field, be specifically related to a kind of pipe cutting machine double-pole Combined knife, it mainly is applicable to the cut-out processing of hot junction pipe fitting and the cold junction pipe fitting of automobile exhaust pipe, the invention still further relates to simultaneously the Pipe Cutting method of combinations thereof cutting knife.

Background technology

At present, in the processing industry of automobile exhaust pipe fitting Pipe Cutting, main Pipe Cutting mode is to use circular saw bit to cut.During cutting, circular saw bit slowly rises, and on it, sawtooth little by little separates sheet iron pin in blocks by pipe fitting, and pipe fitting cuts off the most at last.Then circular saw bit is slowly fallen again, homing.

Use the circular saw bit pipe cutting machine when cutting off pipe fitting, the shortcoming that exists is: 1. machining accuracy is low: because the pipe cutting machine saw blade is fixed with gap, so saw blade deflects when the saw blade cutting is risen, therefore cut off the bad control of pipe fitting length accuracy, general precision is controlled at ± 0.5mm, has a strong impact on product quality; 2. section tilts serious: because of the deviation of fixture fixed position and saw blade in uphill process by pipe jack-up, therefore the pipe fitting section that cuts out tilts, perpendicularity is poor, affects the welding quality of subsequent product; 3. saw life is low, and the Pipe Cutting cost is high: every the every cutting pipes of saw blade 600-800 spare, just need reconditioning again, and on average cut off a pipe fitting and need 0.36 yuan; The Pipe Cutting time long, working (machining) efficiency is low: use the saw blade cutting, average each Pipe Cutting time 26S, the time is oversize can not meet Production requirement; 5. the Pipe Cutting noise is large, and smear metal be difficult for to be processed: during the saw blade cutting, maximum noise can reach 82 decibels, has a strong impact on healthyly, and iron filings splash everywhere, bad collection and processing.

Summary of the invention

In order to overcome when existing circular saw bit cuts the automobile exhaust pipe fitting the above problem that exists, the invention provides a kind of Combined knife, during this Combined knife cutting automobile exhaust pipe fitting, can improve machining accuracy, the reduction production cost; The present invention simultaneously also provides a kind of Pipe Cutting method of this Combined knife.

The technology used in the present invention solution is:

A kind of Combined knife comprises: blade one and the blade two of alternating movement, and blade one, for be used to scratching the broaching tool of pipe fitting, is provided with sawtooth on it, and an end of blade two is for to scratch from pipe fitting the cut end of thrusting and cut off pipe fitting.

Preferably, described cut end comprises point of a knife, in the both sides, rear portion of point of a knife, is provided with curved blade.

Preferably, described cut end is the pointed shape of the peach heart.

Preferably, the setting vertical with blade two of described blade one, and blade one carries over direction of extension motion separately respectively with blade two.

Preferably, described blade one vertically arranges, and described blade two is horizontally disposed with.

Preferably, described blade one is fixed on holder one, and blade two is fixed on holder two.

A kind of Pipe Cutting method of Combined knife, carry out according to the following steps:

A adopts clamping device that pipe fitting is fixed, and blade one and blade two are in the original position state;

B blade one moves, and the sawtooth on blade one marks a groove by pipe fitting, and blade two is motionless in position;

C blade one is return original position, and blade two moves, and the cut end of blade two is from thrusting the cut-out pipe fitting groove;

D blade two is return original position, cuts off the pipe fitting technical process and completes.

Useful technique effect of the present invention is:

The invention provides a kind of Combined knife, it gets up two blade unit, by the cooperation cooperation of the two, pipe fitting is cut off, improved machining accuracy, reduced production cost, shorten break time, reduced Pipe Cutting noise decibel, and the generation of iron filings while having reduced Pipe Cutting.

The accompanying drawing explanation

The invention will be further described below in conjunction with accompanying drawing and the specific embodiment:

Fig. 1 is structural representation sketch of the present invention, and concrete structure and the position relationship of vertical blades and horizontal-blade mainly is shown;

Fig. 2-Fig. 6 is process chart of the present invention; Wherein Fig. 2 illustrates the SBR of cutting pipes; Fig. 3 illustrates the state of vertical cutting knife cutting pipes; Fig. 4 illustrates vertical cutting knife cutting and completes the also state of homing; Fig. 5 illustrates the state of horizontal cutting knife cutting pipes; Fig. 6 illustrates horizontal cutting knife cutting and completes the also state of homing.

In figure: the vertical cutting knife of 1-, the horizontal cutting knife of 2-, 3-vertical blades, the vertical holder of 4-, 5-sawtooth, 6-pipe fitting, 7-horizontal-blade, the horizontal holder of 8-, 9-cut end, 901-point of a knife, 902-curved blade.

The specific embodiment

By reference to the accompanying drawings, a kind of Combined knife, comprise vertical cutting knife 1 and horizontal cutting knife 2, vertical cutting knife 1 and horizontal cutting knife 2 alternating movements.Vertical cutting knife 1 comprises vertical blades 3 and vertical holder 4, and vertical blades 3 makes to be bolted together with vertical holder 4.Vertical blades 3 is the strip broaching tool, in the bottom, left side of vertical blades 3, is provided with sawtooth 5, and the effect of vertical blades 3 is in the vertical direction pipe fitting 6 to be sawed out to a groove, and the cutting minimizing resistance for the horizontal cutting knife 2 in back, prevent the interior notch distortion of pipe fitting 6.Horizontal cutting knife 2 comprises horizontal-blade 7 and horizontal holder 8, and the same bolt that uses of horizontal-blade 7 and horizontal holder 8 is fixed.The left end of horizontal-blade 7 is cut end 9, and cut end 9 comprises point of a knife 901, and the width that is provided with 902 cutter hubs of curved blade 902, two curved blades in the both sides, rear portion of point of a knife 901 broadens gradually.The shape approximation of cut end 9 is in the pointed shape of the peach heart.The effect of horizontal-blade 7 is after vertical blades 3 is scratched pipe fitting, and the cut end 9 of horizontal-blade 7 is thrust pipe fitting and pipe fitting is cut off through scratching groove.During work, vertical blades 3 vertically moves back and forth, and horizontal-blade 7 along continuous straight runs move back and forth.

As shown in Fig. 2-6, the Pipe Cutting method of combinations thereof cutting knife, carry out according to the following steps:

A adopts clamping device that pipe fitting is fixed, and it is the original position state that vertical cutting knife 1 and horizontal cutting knife 2 are in SBR;

The vertical cutting knife 1 of b moves down, and with the vertical blades 3 of sawtooth 5, pipe fitting 6 is marked to a groove, produces iron filings, and horizontal cutting knife 2 is motionless in position;

The vertical cutting knife 1 of c rises and returns original position, and horizontal cutting knife 2 is moved to the left, and the cut end 8 of horizontal-blade 7 is cut off pipe fitting 6 from groove, thrusting;

The horizontal cutting knife 2 of d is return the original position state to the right, cuts off the pipe fitting technical process and completes.

Above-mentioned vertical cutting knife 1 can be connected with transmission mechanism respectively with horizontal cutting knife 2, by transmission mechanism, drives up and down or left and right moves back and forth, and transmission mechanism can carry out centralized Control by PLC.

One side of above-mentioned horizontal-blade 7 can be provided with the lastics shoulder, and the lastics shoulder can be released waste material simultaneously after horizontal-blade 7 cuts off pipe fitting.

The part of not addressing in aforesaid way is taked or is used for reference prior art and can realize.

It should be noted that, under the instruction of this specification, any equivalents that those skilled in the art have done, or obvious variant, all should be within protection scope of the present invention.

Claims (7)

1. Combined knife is characterized in that comprising: blade one and the blade two of alternating movement, and blade one, for be used to scratching the broaching tool of pipe fitting, is provided with sawtooth on it, and an end of blade two is for to scratch from pipe fitting the cut end of thrusting and cut off pipe fitting.

2. a kind of Combined knife according to claim 1, it is characterized in that: described cut end comprises point of a knife, in the both sides, rear portion of point of a knife, is provided with curved blade.

3. a kind of Combined knife according to claim 2, it is characterized in that: described cut end is the pointed shape of the peach heart.

4. a kind of Combined knife according to claim 3 is characterized in that: the setting vertical with blade two of described blade one, and blade one carries over direction of extension motion separately respectively with blade two.

5. a kind of Combined knife according to claim 4, it is characterized in that: described blade one vertically arranges, and described blade two is horizontally disposed with.

6. a kind of Combined knife according to claim 1, it is characterized in that: described blade one is fixed on holder one, and blade two is fixed on holder two.

7. the Pipe Cutting method of a Combined knife is characterized in that carrying out according to the following steps:

A adopts clamping device that pipe fitting is fixed, and blade one and blade two are in the original position state;

B blade one moves, and the sawtooth on blade one marks a groove by pipe fitting, and blade two is motionless in position;

C blade one is return original position, and blade two moves, and the cut end of blade two is from thrusting the cut-out pipe fitting groove;

D blade two is return original position, cuts off the pipe fitting technical process and completes.

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