CN102335926A

CN102335926A - Rotary cutting tool and method for cutting pipe by same

Info

Publication number: CN102335926A
Application number: CN2010102374171A
Authority: CN
Inventors: 王晓东
Original assignee: SHANGHAI MEIHUA MEDICAL EQUIPMENT CO Ltd
Current assignee: Amsino Medical Equipment (Kunshan) Co., Ltd.
Priority date: 2010-07-27
Filing date: 2010-07-27
Publication date: 2012-02-01
Anticipated expiration: 2030-07-27
Also published as: CN102335926B

Abstract

The invention discloses a rotary cutting tool and a method for cutting a pipe by the same. The rotary cutting tool comprises a rotary tool rest, a tool handle, a blade, and a tool handle resetting mechanism; the rotary tool rest is provided with a tool handle groove and an axial through hole which is used for accommodating the pipe to be cut; the tool handle is arranged in the tool handle groove; the tool handle is pivoted with the rotary tool rest and rotates from an initial position to a cutting position when the rotary tool rest rotates; the blade is arranged on the tool handle, and a gap is reserved between the blade and the pipe to be cut when the tool handle is positioned at the initial position; when the tool handle is positioned at the cutting position, the blade cuts the wall of the pipe to be cut; and the tool handle resetting mechanism is used for resetting the tool handle to the initial position. The method for cutting the pipe comprises the following steps of: rotating the tool handle outward by using centrifugal force generated when the rotary tool rest rotates, and simultaneously rotating the blade which is arranged on the tool handle inward to cut the wall of the pipe. When a pipe which is made of an elastic material is cut by the cutting tool, the cutting uniformity and evenness of a cut section can be guaranteed.

Description

The method of rotary cutter and incising pipes thereof

Technical field

The present invention relates to a kind of cutting tool and cutting method thereof, relate in particular to a kind of cutting tool and cutting method thereof that is used for cutting elastic material tubing.

Background technology

Macromolecule, rubber elastomeric material have been widely used in a plurality of fields, such as fields such as building, electronics, medical treatment and traffic.The cut ratio of elastomeric material tubing is easier to produce following problem: the pressure that cutter is produced when cutting can make elastomeric material distortion, the out-of-flatness of tubing cutting section burr etc. often occur.

At present; Usually adopt the mode of rotation cutting that elastomeric material tubing is cut; But traditional rotation cutting mode automaticity is low, mainly relies on manual work to judge cutting angle and time, is difficult to guarantee the uniformity of elastomeric material tubing cutting and the flatness of cutting section like this.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of rotary cutter and cutting method thereof that can be rotated cutting to elastomeric material tubing, utilizes the uniformity that this rotary cutter and cutting method thereof can guarantee to cut and the cutting section smooth of tubing.

The technical scheme that the present invention adopted is: a kind of rotary cutter comprises:

Swivelling tool-holder, this swivelling tool-holder are provided with handle of a knife groove and the axially extending bore that is used for ccontaining tubing to be cut;

Handle of a knife is arranged in the handle of a knife groove, and this handle of a knife and swivelling tool-holder articulate, and can when swivelling tool-holder rotates, turn to a cutting position by an initial position;

Blade is arranged on the handle of a knife, when handle of a knife is in initial position, has a gap between this blade and the tubing to be cut; When handle of a knife was in cutting position, this blade was cut the tube wall of wearing this tubing to be cut;

The handle of a knife resetting-mechanism is used for handle of a knife is reset to initial position.

The invention also discloses a kind of method of incising pipes, may further comprise the steps:

Tubing to be cut is sent in the axially extending bore of a swivelling tool-holder;

At the uniform velocity rotate around a rotating shaft through a drive power source swivelling tool-holder;

The handle of a knife that centrifugal force makes and this swivelling tool-holder articulates that utilizes swivelling tool-holder to be produced when rotated outwards rotates, and when handle of a knife outwards rotated, the blade that is installed on this handle of a knife inwardly rotated, and cuts the tube wall of poling material.

When swivelling tool-holder of the present invention at the uniform velocity rotated under external force drives at high speed, handle of a knife outwards rotated under action of centrifugal force, drove blade simultaneously and inwardly rotated, and the cutting angle of blade and extension elongation are adjusted to the cutting position an of the best.The centrifugal force that the swivelling tool-holder rotation is produced becomes the power of blade cuts, is enough to overcome resistance and the frictional force that blade is run in the incising pipes process, and the cutting angle and the extension elongation of blade remained on above-mentioned optimum Cutting position always.Very high and when keeping even, the centrifugal force of generation is uniformly when the rotating speed of swivelling tool-holder, thus the uniformity of cutting can be guaranteed, and guarantee the cutting section smooth of tubing.

Description of drawings

Fig. 1 is the perspective view of rotary cutter of the present invention;

Fig. 2 is that the master of rotary cutter of the present invention looks sketch map;

Fig. 3 A shows the A-A cutaway view of Fig. 2, and wherein, handle of a knife is in initial position;

Fig. 3 B is the local enlarged diagram of the P part of Fig. 3 A;

Fig. 4 A shows the A-A cutaway view of Fig. 2, and wherein, handle of a knife is in cutting position;

Fig. 4 B is the local enlarged diagram of the R part of Fig. 4 A.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is made and to further specify.

Referring to figs. 1 to Fig. 4 B, rotary cutter of the present invention comprises swivelling tool-holder 1, handle of a knife 2, blade 3 and handle of a knife resetting-mechanism.

Swivelling tool-holder 1 is provided with the axially extending bore 11 that is used for ccontaining tubing to be cut 4, and this axially extending bore 11 has a feed end 11a and a discharge end 11b.Axially extending bore 11 preferably is arranged on the center of swivelling tool-holder 1.Swivelling tool-holder 1 is provided with the handle of a knife groove 12 that extends along circumferentially.This swivelling tool-holder 1 can be around rotating shaft rotation under the driving of a power source, and this rotating shaft for example can be the central axis of this axially extending bore, adopts motor as power source usually.Handle of a knife 2 is arranged in the handle of a knife groove 12, and a side of handle of a knife 2 and swivelling tool-holder 1 are arranged in swivelling tool-holder 1 simultaneously through one and articulate each other with pin 5 on the handle of a knife 2.Handle of a knife 2 has an initial position and a cutting position, and can when swivelling tool-holder 1 rotation, turn to cutting position by initial position.Blade 3 is arranged on the handle of a knife 2.The handle of a knife resetting-mechanism comprises at least one back-moving spring, and an end of this back-moving spring links to each other with swivelling tool-holder 1, and the other end links to each other with handle of a knife 2.This handle of a knife resetting-mechanism is used for handle of a knife 2 is reset to initial position.

In the embodiment shown in Fig. 1 to Fig. 4 B, swivelling tool-holder 1 comprises a body 1a and a feeder 1b, and handle of a knife 2 is arranged on this body 1a, and feeder 1b is positioned at the side of body 1a, and links to each other with body 1a.The external diameter of feeder 1b is less than the external diameter of body 1a.On the outer wall of body 1a, be provided with one be used to place feed belt endless-belt groove 13, on the outer wall of feeder 1b, be provided with the groove 14 that is connected with the axially extending bore 11 of swivelling tool-holder 1.When cutting operation, a pressure head can extend in the groove 14, and is pressed on the tubing to be cut 4, thereby keeps the glacing flatness of tubing 4.The cross section of handle of a knife 2 is that ring type is fan-shaped, on the bottom surface 120 of handle of a knife groove 12, is provided with an arc groove 121, this arc groove 121 when handle of a knife 2 is in initial position and the inner arc surface of handle of a knife 2 21 common form one can ccontaining tubing 4 to be cut through hole.Blade 3 is installed on the handle of a knife 2 through four pins 32.The handle of a knife resetting-mechanism comprises a back-moving spring 61; The bottom surface 120 of handle of a knife groove 12 is provided with a spring groove 122; One end 2a of handle of a knife 2 is provided with a spring groove 22, and an end of back-moving spring 61 is arranged in the spring groove 122 of handle of a knife groove bottom, and links to each other with swivelling tool-holder 1; The other end is arranged in the spring groove 22 of handle of a knife one end 2a, and links to each other with handle of a knife 2.

Shown in Fig. 3 A, Fig. 3 B, when handle of a knife 2 is in initial position, has a gap between this blade 3 and the tubing 4 to be cut, thereby can not influence the tubing charging.Handle of a knife 2 leaves a gap between the bottom surface near a pin end 2a of 5 and handle of a knife groove 12, so that handle of a knife 2 can outwards rotate around pin 5, handle of a knife 2 is close to the bottom surface 120 of handle of a knife groove 12 away from 5 the other end 2b of pinning.

When carrying out cutting operation; The tubing 4 that is pushed into from the entrance point 11a of cutter can touch a limit switch after port of export 11b stretches out; Control device starter motor immediately after receiving the enabling signal that this limit switch sends, motor is through dynamic conveyor belt driven rotary knife rest 1 at the uniform velocity running at a high speed.Because action of centrifugal force, handle of a knife 2 can overcome the screen resilience that the handle of a knife resetting-mechanism provides, and 5 be that pivot outwards rotates to pin, and arrives to the bottom surface 120 of handle of a knife groove 12 up to an end 2a of handle of a knife 2, and handle of a knife 2 is in cutting position at this moment.In handle of a knife 3 outside rotating process, blade 3 inwardly rotates, and the blade 31 of blade 3 is cut the tube wall of wearing this tubing to be cut along the direction of the central axis of through hole 11 perpendicular to axial direction, shown in Fig. 4 A, Fig. 4 B.

After accomplishing cutting operation; Motor quits work, and swivelling tool-holder 1 slowly stops operating, and centrifugal force disappears; Handle of a knife 2 and blade 3 fall back to initial position under the screen resilience effect of handle of a knife resetting means, the other end 2b of handle of a knife 2 is resisted against on the bottom surface 120 of handle of a knife groove 12.

The invention also discloses a kind of method of incising pipes, it may further comprise the steps:

At the uniform velocity rotate around a rotating shaft through this swivelling tool-holder of a drive power source, this rotating shaft for example is the central axis of this axially extending bore, and the rotating speed of this swivelling tool-holder then changes according to the type of institute's incising pipes;

The handle of a knife that centrifugal force makes and this swivelling tool-holder articulates that utilizes swivelling tool-holder to be produced when rotated outwards rotates, and when this handle of a knife outwards rotated, the blade that is installed on this handle of a knife inwardly rotated, and cuts the tube wall of poling material; Under action of centrifugal force, handle of a knife 2 can remain on cutting position always, and the cutting angle of blade 3 and extension elongation also are able to keep, thereby tubing 4 is cut off equably.After tubing 4 is cut off, can cut off the power of power source, make rotary cutter stop the rotation, under the effect of the screen resilience of handle of a knife resetting means, handle of a knife 2 and blade 3 initial position that all is reset.

Adopt technical scheme of the present invention, can realize uniform and stable ground cutting elastic material tubing, and guarantee the smooth of tubing cutting section.

Though the present invention describes with reference to current specific embodiment; But those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the present invention; Do not breaking away from variation or the replacement that also can make various equivalences under the situation of the present invention, therefore, as long as in connotation scope of the present invention in the scope to the variation of the foregoing description, claims that modification all will drop on the application.

Claims

1. a rotary cutter is characterized in that, comprising:

Swivelling tool-holder, said swivelling tool-holder are provided with handle of a knife groove and the axially extending bore that is used for ccontaining tubing to be cut;

Handle of a knife is arranged in the said handle of a knife groove, and this handle of a knife and said swivelling tool-holder articulate, and can when swivelling tool-holder rotates, turn to a cutting position by an initial position;

Blade is arranged on the said handle of a knife, when said handle of a knife is in initial position, has a gap between this blade and the tubing to be cut; When said handle of a knife was in cutting position, this blade was cut the tube wall of wearing this tubing to be cut;

The handle of a knife resetting-mechanism is used for said handle of a knife is reset to initial position.

2. rotary cutter as claimed in claim 1 is characterized in that, said handle of a knife resetting-mechanism comprises at least one back-moving spring, and an end of this back-moving spring links to each other with said swivelling tool-holder, and the other end links to each other with said handle of a knife.

3. rotary cutter as claimed in claim 1 is characterized in that, the cross section of said handle of a knife is that ring type is fan-shaped, on the bottom surface of said handle of a knife groove, is provided with an arc groove; This arc groove is when said handle of a knife is in initial position and the common through hole that forms a ccontaining tubing to be cut of the inner arc surface of said handle of a knife.

4. rotary cutter as claimed in claim 1 is characterized in that, a side of said handle of a knife articulates through the pin that is arranged in simultaneously on said swivelling tool-holder and the said handle of a knife each other.

5. rotary cutter as claimed in claim 1 is characterized in that said axially extending bore is arranged on the center of said swivelling tool-holder.

6. rotary cutter as claimed in claim 1 is characterized in that, said swivelling tool-holder comprises a body and a feeder, and said handle of a knife is arranged on this body, and feeder is positioned at a side of body, and links to each other with body; The external diameter of feeder is less than the external diameter of body.

7. rotary cutter as claimed in claim 6 is characterized in that, the outer wall of said body be provided with one be used to place feed belt the endless-belt groove.

8. rotary cutter as claimed in claim 7 is characterized in that, the outer wall of said feeder is provided with the groove that is connected with the axially extending bore of swivelling tool-holder.

9. the method for an incising pipes is characterized in that, may further comprise the steps:

At the uniform velocity rotate around a rotating shaft through the said swivelling tool-holder of a drive power source;

The handle of a knife that centrifugal force makes and this swivelling tool-holder articulates that utilizes swivelling tool-holder to be produced when rotated outwards rotates, and when said handle of a knife outwards rotated, the blade that is installed on this handle of a knife inwardly rotated, and cuts the tube wall of wearing said tubing.