CN113500305B

CN113500305B - Cam clamping device of laser edge trimmer

Info

Publication number: CN113500305B
Application number: CN202110779331.XA
Authority: CN
Inventors: 安旭; 刘新斌; 孔令光
Original assignee: Suzhou Slac Smart Mold Manufacturing Co ltd
Current assignee: Suzhou Slac Smart Mold Manufacturing Co ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2023-03-10
Anticipated expiration: 2041-07-09
Also published as: CN113500305A

Abstract

A cam clamping device of a laser edge trimmer comprises a rotary disc assembly, wherein a clamping mechanism is rotatably arranged on the rotary disc assembly and comprises a rotating wheel, a positioning seat and a plurality of clamping jaw blocks; each clamping jaw block is slidably arranged in the positioning seat in a penetrating way and is retracted inwards to clamp the metal hollow body; the pressing plate and the pressing cam assembly are further included; the pressing plate is provided with a first arc pressing surface which surrounds and corresponds to the pre-rotation station and the cutting station of the rotating disc component; the pressing cam component comprises a wheel disc and a plurality of cam blocks; a plurality of second arc pressing surfaces are concavely arranged on the circumferential surface of the wheel disc, and each cam block is assembled on the outer circumference of the wheel disc in a sliding manner and is in one-to-one alignment with each second arc pressing surface; a third arc pressing surface is formed on the inner side surface of the cam block; under the unclamped state, at least one clamping jaw block is pressed and compressed inwards with the second arc pressing surface, and at least one clamping jaw block is separated from the third arc pressing surface and pressed outwards; and under the clamping state, each clamping jaw block is pressed and compressed inwards with the second or third arc pressing surface. The invention skillfully utilizes the cam to clamp, so that the structure of the device is more compact, and the cutting quality is ensured.

Description

Cam clamping device of laser edge trimmer

Technical Field

The invention relates to the field of processing equipment of a metal hollow body, in particular to a cam clamping device of a laser edge trimmer of the metal hollow body.

Background

The metal hollow body is a metal cylinder body with one open end, such as a metal can and a power battery shell. In the case of a metal can (two-piece can made of iron, aluminum, or the like), a can end trimming device is used because the metal can is generally composed of a can lid and a can body, and the can body is cut in the height direction after being drawn so as to make the height of the can body uniform and to remove burrs at the can end.

At present, with the popularization of laser processing, laser cutting has already started to be applied to metal packaging or new energy industries, and the applicant has previously filed several patents about non-contact trimming of metal hollow bodies. The high pressure gas exerts a radial force on the metal hollow body, which, if it is not clamped, causes the metal hollow body to be blown askew, resulting in poor cutting quality. In order to ensure that the metal hollow body is accurately positioned and is not blown askew by high-pressure gas during cutting.

When the edge cutting processing is carried out after the cylindrical battery metal shell is molded by using laser, the battery shell needs to rotate around the axis of the battery shell at a high speed, and the irregular parts of the opening part are cut off by the laser in a stable rotation period, so that the battery shell meeting the height requirement is obtained. The rotation of the battery shell (or called as a workpiece) needs to be completed by depending on the clamp. The clamp needs to fulfill several functions:

firstly, can make the smooth clamping of work piece, to the thin wall shell class work piece that the quality is lighter, typical practice is through the vacuum with the work piece suction location cylinder downthehole. A certain gap is required between the workpiece and the positioning hole of the clamp, so that the workpiece can be smoothly sucked in place. After the machining is completed, the workpiece is released from the pilot hole, typically by blowing the workpiece out with compressed air.

And secondly, the clamp assembly realizes high-speed stable autorotation at a laser cutting station so as to finish the laser cutting action. Meanwhile, the workpiece can keep non-rotation or very low-speed rotation at the loading and unloading stations, so that the workpiece can be loaded and unloaded smoothly.

The high-speed rotation of anchor clamps drive work piece realizes laser cutting, because the existence in the above-mentioned clearance between work piece and the anchor clamps locating hole that exists because of loading and the demand of unloading can lead to the work piece rotation to have beats, and the existence of normal direction air current has been played more to the existence during especially laser cutting. The jump causes the instantaneous tangent point of the workpiece to vibrate near the laser focus, which causes the serious defects of reduced quality of the cut and even uneven cut. During cutting, the vacuum suction force on the workpiece bottom plate is kept in the clamp, so that the jump of the tank body during rotation can be restrained to a certain extent, but the gap and the cutting airflow exist, so that the requirement on cutting quality cannot be met only by the vacuum suction force. Reducing the gap reduces bounce but increases the risk of charging failure.

Taking a typical 18650 cylindrical battery steel shell as an example, under the condition that the cutting speed of the device is 300 shells per minute, the period of each cutting is only 0.2 second, the time for feeding is only about 0.1 second, when the speed of the device is increased to 500 or even 600 pieces per minute, the feeding time is only dozens of milliseconds, if a workpiece enters a positioning hole stably, except for the fact that the positioning hole position needs to have a large enough lead-in chamfer, the clearance of a matching part is not too small.

From the above description, it is desirable that the positioning clearance of the fixture is large during loading and unloading, but the cutting quality requires that the fit clearance between the fixture and the workpiece is as small as possible or even completely free of clearance. This conflict needs to be resolved in order to operate the apparatus at high speed and high quality.

Therefore, how to solve the above-mentioned deficiencies of the prior art is a problem to be solved by the present invention.

Disclosure of Invention

The invention aims to provide a cam clamping device of a laser edge cutting machine.

In order to achieve the purpose, the invention adopts the technical scheme that:

a cam clamping device of a laser edge trimmer comprises a rotary disc assembly, a cam driving mechanism and a cam driving mechanism, wherein the rotary disc assembly is arranged on a rack in a driving mode through a driving shaft; the rotating disc assembly is rotatably provided with at least one group of clamping mechanisms, and each group of clamping mechanisms is arranged in the circumferential direction by taking the driving shaft as a reference;

the clamping mechanism comprises a rotating wheel, a positioning seat and at least three clamping jaw blocks;

the rotating wheel rotates around an axis which is parallel to the driving shaft;

the positioning seat is fixedly arranged on the front side of the rotating wheel along the axis direction, a positioning hole is formed in the center of the positioning seat and used for positioning the metal hollow body, and the diameter of the positioning hole is larger than that of the metal hollow body;

each clamping jaw block penetrates through the positioning seat in a sliding mode along the radial direction of the positioning hole, and has two states of extending outwards and retracting inwards, and each clamping jaw block is arranged in the circumferential direction with the axis as the reference; the inner end of the clamping jaw block faces the positioning hole and is concavely provided with an arc surface, so that when the clamping jaw block retracts inwards, the metal hollow body is clamped through the arc surface; when the clamping jaw block extends outwards, the clamping of the metal hollow body is released; the first spring acts between the clamping jaw block and the positioning seat to form an outward extending trend of the clamping jaw block through the first spring;

the rotary disc assembly is provided with a pre-rotation station, a cutting station and a discharging station, wherein the cutting station and the laser cutting head are arranged in an alignment manner;

the cam clamping device also comprises a pressing plate and a pressing cam component;

the pressing plate is fixedly arranged on the rack and provided with a first arc pressing surface which surrounds the rotating disc component and is at least arranged corresponding to a pre-rotation station and a cutting station of the rotating disc component;

the pressing cam component comprises a wheel disc and a plurality of cam blocks;

the wheel disc is coaxially and fixedly arranged on the front side of the rotating disc assembly, and the wheel disc and the rotating disc assembly synchronously rotate; a plurality of second arc pressing surfaces are concavely arranged on the circumferential surface of the wheel disc, and each second arc pressing surface is arranged in the circumferential direction by taking the driving shaft as a reference and is in one-to-one alignment fit with each clamping mechanism;

each cam block is assembled on the periphery of the wheel disc in a sliding mode along the radial direction of the wheel disc and has two states of extending outwards and retracting inwards, and each cam block is arranged in the circumferential direction by taking the driving shaft as a reference;

each cam block is matched with each second arc pressing surface in a one-to-one alignment way; a third arc pressing surface is formed on the inner side surface of the cam block; the positioning seat of the clamping mechanism is encircled and in clearance fit with the third arc abutting surface by the second arc abutting surface and the third arc abutting surface; under the unclamped state, at least one clamping jaw block is in abutting-pressing fit with the second arc abutting-pressing surface and is in a retracted state, and at least one clamping jaw block is separated from the third arc abutting-pressing surface and is in an extended state; in a clamping state, each clamping jaw block is in abutting press fit with the second arc abutting surface or the third arc abutting surface and is in a retracted state; the cam block is arranged on the wheel disc, and the cam block is arranged on the wheel disc and is provided with a cam block;

when the clamping mechanism revolves to the pre-rotation station along with the rotating disc component, the rotating wheel of the clamping mechanism is in a self-rotation state at the moment, the first arc pressing surface of the pressing plate presses the outer side of the cam block aligned with the clamping mechanism to force the cam block to contract inwards, and then the clamping jaw block in the third arc pressing surface of the cam block is pressed to ensure that the clamping jaw block also contracts inwards; because the second arc pressing surface of the wheel disc always presses the clamping jaw block positioned in the wheel disc, each clamping jaw block forming the clamping mechanism is simultaneously pressed by the second arc pressing surface and the third arc pressing surface, and the metal hollow body positioned in the positioning hole of the clamping mechanism is clamped.

The relevant content in the above technical solution is explained as follows:

1. in the scheme, when the clamping mechanism revolves to the cutting station along with the rotary disc component, the rotating wheel of the clamping mechanism reaches a preset rotating speed, and the laser cutting head emits laser to perform trimming operation on the metal hollow body;

when the clamping mechanism revolves to the discharging station along with the rotating disc component, the rotating wheel of the clamping mechanism stops or starts to stop rotating, the first arc abutting surface of the abutting plate is separated from the outer side of the cam block aligned by the clamping mechanism, the cam block extends outwards again, the abutting pressure of the clamping jaw block in the third arc abutting surface of the cam block is further relieved, the cam block also extends outwards, the clamping jaw block in the positioning hole of the clamping mechanism is further loosened, and discharging is facilitated.

2. In the scheme, the cam pressing device further comprises a positioning star wheel assembly which is coaxially and fixedly arranged on the front side of the wheel disc of the pressing cam assembly; the rotating disc assembly, the wheel disc and the positioning star wheel assembly are driven by the driving shaft to rotate coaxially and synchronously;

and a plurality of arc positioning grooves are concavely arranged on the circumferential surface of the positioning star wheel assembly, are uniformly distributed in the circumferential direction by taking the driving shaft as a reference and are matched with the positioning holes of the clamping mechanism in a one-to-one alignment manner.

3. In the above scheme, a first rotating wheel is rotatably arranged at the outer end of the clamping jaw block of the clamping mechanism, and a rotating shaft of the first rotating wheel is parallel to the axis; when the cam block retracts inwards, the first rotating wheel is pressed by the third arc pressing surface to enable the clamping jaw block to retract inwards; when the clamping jaw block is positioned in the second arc pressing surface, the first rotating wheel is pressed by the second arc pressing surface to enable the clamping jaw block to retract inwards.

4. In the above scheme, the outer end of the cam block is rotatably provided with a second rotating wheel, and the rotating shaft of the second rotating wheel is parallel to the driving shaft; when the cam block contacts with the first arc pressing surface of the pressing plate along with the rotation of the wheel disc, the second rotating wheel is pressed by the first arc pressing surface to enable the cam block to retract inwards.

5. In the above scheme, the radial center of the rotating wheel is provided with an air hole which is communicated with the positioning hole.

The working principle and the advantages of the invention are as follows:

the cam controls the opening and closing of the clamping jaw block in the clamping mechanism, so that the metal hollow body is positioned while rotating. When the metal hollow body rotates at a high speed in the clamping mechanism, one part of the clamping mechanism is a positioning surface which is relatively fixed with the rotation axis and has enough precision, and a floating part (namely a clamping jaw block) of the clamping mechanism is controlled by a cam and moves towards the positioning surface when needing to be closed, so that the metal hollow body is clamped on the positioning surface, the gap is completely eliminated, the central line of the metal hollow body is completely overlapped with the rotation axis, and the jumping of the metal hollow body is eliminated.

When the clamping mechanism enters or is about to enter the feeding station and the discharging station, the rotation speed of the rotating wheel of the clamping mechanism is reduced, so that the clamping mechanism further reduces the rotation speed at the feeding station and the discharging station and even completely stops rotation. Along with the reduction of rotation speed, simultaneously through cam control, let unsteady clamping jaw piece loosen, no longer centre gripping metal hollow body for metal hollow body's circumferencial direction obtains sufficient clearance, after losing clamping-force, is blown out by compressed air in ejection of compact station from the locating hole. In the feeding position, the clamping mechanism has enough clearance due to the abdication of the floating part, and can be smoothly sucked by vacuum in the positioning hole.

The clamping mechanism is ingenious and compact in structural design, and can realize first clamping through autorotation of the clamping mechanism, and the first clamping is to directly clamp the metal hollow body through each clamping jaw block in the clamping mechanism. Meanwhile, the second clamping can be realized through the revolution of the clamping mechanism, namely, the second clamping is realized through the combined action of the pressing plate and the pressing cam assembly, each clamping jaw block in the clamping mechanism from the revolution to the appointed station is simultaneously pressed, and then the clamping jaw blocks of the clamping mechanism are pressed through the pressing plate and the pressing cam assembly, so that the indirect clamping of the metal hollow body is realized, and only any clamping jaw block is loosened when the clamping is released. Borrow this and press from both sides tight, the tight special design of second clamp, can guarantee the tight and relax of the tight and quick, smooth and stable of clamp of metal hollow body, can make equipment structure more compact, and can effectively guarantee the firm of the metal hollow body when pressing from both sides tightly, be convenient for carry out high-quality laser side cut operation.

Compared with the prior art, the invention has the advantages that:

1. the cam structure is ingeniously utilized to control the clamping jaw block to contract inwards or extend outwards to be opened, so that the cam structure acts on the metal hollow body, and the jumping of the metal hollow body is restrained. The feeding and discharging also originally need the clamping mechanism to stop rotating, and when the clamp clearance is needed, the clamping force is just not generated;

2. the tank feeding stability and the processing quality of the metal hollow body are greatly improved, the equipment speed is also greatly improved, and the equipment speed is improved to 500cmp from the original speed which can only be stabilized at about 100 cpm;

3. the invention is not only suitable for battery cases and pop cans, but also can be suitable for various occasions needing rapid clamping and unloading and rotary processing.

Drawings

FIG. 1 is a first schematic structural diagram (front view) of an embodiment of the present invention;

FIG. 2 is a second structural schematic diagram (top view) of the embodiment of the present invention;

FIG. 3 is a schematic structural view (side view) of a clamping mechanism according to an embodiment of the present invention;

FIG. 4 isbase:Sub>A schematic sectional view taken along line A-A of FIG. 3;

FIG. 5 is an exploded, exploded view of a clamping mechanism according to an embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of a clamping mechanism in accordance with an embodiment of the present invention in cooperation with a pressure plate and a pressure cam assembly.

In the above drawings: 1. a rotating disk assembly; 2. a drive shaft; 3. a frame; 4. a clamping mechanism; 5. a rotating wheel; 6. positioning seats; 7. a jaw block; 8. positioning holes; 9. a metal hollow body; 10. a first spring; 11. a feeding station; 12. pre-rotation station; 13. a cutting station; 14. a function reservation station; 15. a discharging station; 16. a laser cutting head; 17. pressing the plate; 18. a first arc pressing surface; 19. a wheel disc; 20. a cam block; 21. a second arc pressing surface; 22. a third arc pressing surface; 23. a second spring; 24. positioning the star wheel assembly; 25. an arc positioning groove; 26. a first rotating wheel; 27. a second wheel.

Detailed Description

The invention is further described with reference to the following figures and examples:

the embodiment is as follows: the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms "a", "an", "the" and "the", as used herein, also include the plural forms.

The terms "first," "second," and the like, as used herein, are not intended to be limited to a particular order or sequence, nor are they intended to be used to limit the scope of the present disclosure, but only to distinguish components or operations described by the same terms.

As used herein, "connected" or "positioned" refers to two or more elements or devices being in direct or indirect physical contact with each other, and may also refer to two or more elements or devices being in operation or action with each other.

As used herein, the terms "comprising," "including," "having," and the like are open-ended terms that mean including, but not limited to.

As used herein, the term (terms), unless otherwise indicated, shall generally have the ordinary meaning as commonly understood by one of ordinary skill in the art, in this application, and in the special art. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the disclosure.

The terms "front", "back", "upper", "lower", "inner" and "outer" used herein are directional terms, and are used only for describing the positional relationship between the structures, and are not intended to limit the protection schemes and the actual implementation directions.

Referring to fig. 1 to 6, a cam clamping device of a laser edge trimmer comprises a rotating disc assembly 1, wherein the rotating disc assembly 1 is rotationally arranged on a frame 3 through a driving shaft 2; at least one group of clamping mechanisms 4 are arranged on the rotating disc component 1 in a rotating mode, and when the number of the clamping mechanisms 4 is larger than or equal to two groups, the clamping mechanisms 4 in each group are uniformly distributed in the circumferential direction by taking the driving shaft 2 as a reference.

The clamping mechanism 4 comprises a rotating wheel 5, a positioning seat 6 and at least three clamping jaw blocks 7; the rotating wheel 5 rotates about an axis parallel to the drive shaft 2; the positioning seat 6 is fixedly arranged on the front side of the rotating wheel 5 along the axis direction, a positioning hole 8 is formed in the center of the positioning seat 6 and used for positioning a metal hollow body 9, and the diameter of the positioning hole 8 is larger than that of the metal hollow body 9.

Each clamping jaw block 7 is penetrated in the positioning seat 6 in a sliding mode along the radial direction of the positioning hole 8, and has an outward extending state and an inward retracting state, and each clamping jaw block 7 is uniformly distributed in the circumferential direction by taking the axis as a reference; the inner end of the clamping jaw block 7 faces the positioning hole 8 and is concavely provided with an arc surface, so that when the clamping jaw block 7 retracts inwards, the metal hollow body 9 is clamped through the arc surface; when the clamping jaw block 7 extends outwards, the clamping of the metal hollow body 9 is released; the clamping jaw device further comprises a first spring 10, wherein the first spring 10 acts between the clamping jaw block 7 and the positioning seat 6 to form an extending trend of the clamping jaw block 7 through the first spring 10.

The rotary disc assembly 1 is provided with a feeding station 11, a pre-rotation station 12, a cutting station 13, a function reservation station 14 and a discharging station 15, and all the stations are sequentially arranged according to a processing time sequence; wherein the cutting station 13 is positioned opposite a laser cutting head 16.

The cam clamping device also comprises a pressing plate 17 and a pressing cam component; the pressing plate 17 is fixedly arranged on the frame 3 and has a first arc pressing surface 18, and the first arc pressing surface 18 surrounds the rotating disc assembly 1 and is at least arranged corresponding to the pre-rotation station 12 and the cutting station 13 of the rotating disc assembly 1.

The pressing cam component comprises a wheel disc 19 and a plurality of cam blocks 20; the wheel disc 19 is coaxially and fixedly arranged on the front side of the rotating disc assembly 1, and the two rotate synchronously; a plurality of second arc pressing surfaces 21 are concavely arranged on the circumferential surface of the wheel disc 19, and each second arc pressing surface 21 is uniformly distributed in the circumferential direction by taking the driving shaft 2 as a reference and is in one-to-one contraposition fit with each clamping mechanism 4; each of the cam blocks 20 is slidably fitted to the outer periphery of the disk 19 in the radial direction of the disk 19, and has two states of outward extension and inward retraction, and each of the cam blocks 20 is uniformly distributed in the circumferential direction with reference to the drive shaft 2.

Each cam block 20 is matched with each second arc pressing surface 21 in a one-to-one alignment way; a third arc pressing surface 22 is formed on the inner side surface of the cam block 20; the positioning seat 6 of the clamping mechanism 4 is embraced by the second arc pressing surface 21 and the third arc pressing surface 22 and is in clearance fit with each other; under the unclamped state, at least one clamping jaw block 7 is in abutting-pressing fit with the second arc abutting surface 21 and is in a retracted state, and at least one clamping jaw block 7 is separated from the third arc abutting surface 22 and is in an extended state; in a clamping state, each clamping jaw block 7 is in abutting fit with the second arc abutting surface 21 or the third arc abutting surface 22 and is in a retracted state; and a second spring 23, wherein the second spring 23 acts between the cam block 20 and the wheel disc 19, and the cam block 20 is kept in an extending trend through the second spring 23.

When the clamping mechanism 4 revolves to the pre-rotation station 12 along with the rotating disc assembly 1, the rotating wheel 5 of the clamping mechanism 4 is in a rotation state at this time, the first arc pressing surface 18 of the pressing plate 17 presses against the outer side of the cam block 20 aligned with the clamping mechanism 4, so that the cam block 20 is forced to contract inwards, and the clamping jaw block 7 in the third arc pressing surface 22 of the cam block 20 is pressed, so that the latter also contracts inwards; because the second arc pressing surface 21 of the wheel disc 19 always presses against the clamping jaw block 7 located therein, each clamping jaw block 7 constituting the clamping mechanism 4 is simultaneously pressed by the second arc pressing surface 21 and the third arc pressing surface 22, and thus the metal hollow body 9 located in the positioning hole 8 of the clamping mechanism 4 is clamped in all directions.

When the clamping mechanism 4 revolves to the cutting station 13 along with the rotating disc assembly 1, the rotating wheel 5 of the clamping mechanism 4 reaches a preset rotating speed, and the laser cutting head 16 emits laser to perform trimming operation on the metal hollow body 9.

When the clamping mechanism 4 revolves to the discharging station 15 along with the rotating disc assembly 1, the rotating wheel 5 of the clamping mechanism 4 stops or starts to stop rotating, the first arc pressing surface 18 of the pressing plate 17 is separated from the outer side of the cam block 20 aligned with the clamping mechanism 4, the cam block 20 is extended again, the pressing of the clamping jaw block 7 in the third arc pressing surface 22 of the cam block 20 is released, the latter is extended again, and the clamping of the metal hollow body 9 in the positioning hole 8 of the clamping mechanism 4 is released, so that the discharging is facilitated.

In summary, the present invention makes it possible to achieve a first clamping by rotation of the clamping mechanism 4, i.e. a direct clamping of the metallic hollow body 9 by the clamping mechanism 4.

Meanwhile, the second clamping can be realized through the revolution of the clamping mechanism 4, namely, the second clamping simultaneously presses each clamping jaw block 7 in the clamping mechanism 4 revolving to the designated station through the combined action of the pressing plate 17 and the pressing cam component, so that the indirect clamping of the metal hollow body 9 through the pressing plate 17 and the pressing cam component is realized, and only any clamping jaw block 7 is required to be released when the clamping is released.

The device also comprises a positioning star wheel assembly 24, wherein the positioning star wheel assembly 24 is coaxially and fixedly arranged on the front side of the wheel disc 19 of the pressing cam assembly; the rotary disk assembly 1, the rotary disk 19 and the positioning star wheel assembly 24 are driven by the drive shaft 2 to rotate coaxially and synchronously.

The circumferential surface of the positioning star wheel assembly 24 is concavely provided with a plurality of arc positioning grooves 25, and each arc positioning groove 25 is uniformly distributed in the circumferential direction by taking the driving shaft 2 as a reference and is matched with the positioning holes 8 of the clamping mechanism 4 in a one-to-one alignment way.

When the rotating disc assembly 1 is static, the metal hollow bodies 9 fall into the circular arc positioning grooves 25 of the positioning star wheel assembly 24 at the feeding station 11 and are quickly sucked or pushed into the positioning holes 8 of the clamping mechanism 4 which does not rotate, and then the clamping mechanism 4 starts to rotate and revolve to the pre-rotation station 12.

The functional reservation station 14 may comprise a station for subsequent treatment of the mouth of the metallic hollow body 9 after trimming, such as deburring, cleaning, etc.

Preferably, a first rotating wheel 26 is rotatably arranged at the outer end of the clamping jaw block 7 of the clamping mechanism 4, and the rotating shaft of the first rotating wheel 26 is parallel to the axis; when the cam block 20 retracts, the first rotating wheel 26 is pressed by the third arc pressing surface 22, so that the clamping jaw block 7 retracts; when the clamping jaw block 7 is located in the second arc pressing surface 21, the first rotating wheel 26 is pressed by the second arc pressing surface 21 to retract the clamping jaw block 7.

The outer end of the clamping jaw block 7 is prevented from being in hard contact with the second arc pressing surface 21 of the wheel disc 19 and the third arc pressing surface 22 of the cam block 20 through rolling fit, so that the equipment components are protected, the running reliability of the equipment is ensured, the service life of the equipment is prolonged, and the maintenance cost is reduced; the efficiency of abutting and pressing fit is improved, and the retraction response of the clamping jaw block 7 is faster and smoother.

Preferably, the outer end of the cam block 20 is rotatably provided with a second rotating wheel 27, and the rotating shaft of the second rotating wheel 27 is parallel to the driving shaft 2; when the cam block 20 contacts the first arc pressing surface 18 of the pressing plate 17 along with the rotation of the wheel disc 19, the second runner 27 is pressed by the first arc pressing surface 18 to retract the cam block 20.

The outer side of the cam block 20 is prevented from being in hard contact with the first arc pressing surface 18 of the pressing plate 17 through rolling fit, so that equipment parts are protected, the running reliability of the equipment is ensured, the service life of the equipment is prolonged, and the maintenance cost is reduced; the efficiency of the abutting fit is further improved, so that the retraction response of the cam block 20 is faster and smoother.

Preferably, an air hole is formed in the radial center of the rotating wheel 5, and the air hole is communicated with the positioning hole 8. The accessible gas pocket is connected with the gas circuit of a vacuum pump to the location of breathing in of realization to hollow metal body 9 still can let in compressed air in to the gas pocket, realizes the unloading of blowing to hollow metal body 9.

Compared with the prior art, the clamping mechanism is ingenious and compact in structural design, and can realize first clamping through rotation of the clamping mechanism, namely, the first clamping directly clamps the metal hollow body through each clamping jaw block in the clamping mechanism. Meanwhile, the second clamping can be realized through the revolution of the clamping mechanism, namely, the second clamping is realized through the combined action of the pressing plate and the pressing cam assembly, each clamping jaw block in the clamping mechanism from the revolution to the appointed station is simultaneously pressed, and then the clamping jaw blocks of the clamping mechanism are pressed through the pressing plate and the pressing cam assembly, so that the indirect clamping of the metal hollow body is realized, and only any clamping jaw block is loosened when the clamping is released. Borrow this and press from both sides tight, the tight special design of second clamp, can guarantee the tight and relax of the tight and quick, smooth and stable of clamp of metal hollow body, can make equipment structure more compact, and can effectively guarantee the firm of the metal hollow body when pressing from both sides tightly, be convenient for carry out high-quality laser side cut operation.

The above embodiments are only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the protection scope of the present invention by this means. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a cam clamping device of laser bead cutter which characterized in that:

the rotary disc assembly is arranged on a rack in a driving way through a driving shaft; the rotating disc assembly is rotatably provided with at least one group of clamping mechanisms, and each group of clamping mechanisms is arranged in the circumferential direction by taking the driving shaft as a reference;

each clamping jaw block penetrates through the positioning seat in a sliding mode along the radial direction of the positioning hole, and has two states of extending outwards and retracting inwards, and each clamping jaw block is arranged in the circumferential direction by taking the axis as the reference; the inner end of the clamping jaw block is arranged towards the positioning hole, and is concavely provided with an arc surface, so that when the clamping jaw block is retracted, the metal hollow body is clamped through the arc surface; when the clamping jaw block extends outwards, the clamping of the metal hollow body is released; the first spring acts between the clamping jaw block and the positioning seat to form an outward extending trend of the clamping jaw block through the first spring;

the rotary disc assembly is provided with a pre-rotation station, a cutting station and a discharging station, wherein the cutting station is arranged in alignment with a laser cutting head;

the pressing plate is fixedly arranged on the rack and provided with a first arc pressing surface which surrounds the rotating disc assembly and is at least arranged corresponding to the pre-rotation station and the cutting station of the rotating disc assembly;

when the clamping mechanism revolves to the pre-rotation station along with the rotating disc assembly, the rotating wheel of the clamping mechanism is in a self-rotation state at the moment, the first arc abutting surface of the abutting plate abuts against the outer side of the cam block aligned with the clamping mechanism to force the cam block to contract inwards, and then the clamping jaw block in the third arc abutting surface of the cam block is abutted against and pressed to ensure that the clamping jaw block also contracts inwards; because the second arc pressing surface of the wheel disc always presses the clamping jaw block positioned in the wheel disc, each clamping jaw block forming the clamping mechanism is simultaneously pressed by the second arc pressing surface and the third arc pressing surface, and the metal hollow body positioned in the positioning hole of the clamping mechanism is clamped.

2. The cam clamping device of the laser edge trimmer according to claim 1, wherein:

when the clamping mechanism revolves to the cutting station along with the rotary disc assembly, the rotating wheel of the clamping mechanism reaches a preset rotating speed, and the laser cutting head emits laser to perform edge cutting operation on the metal hollow body;

when the clamping mechanism revolves to the discharging station along with the rotating disc assembly, the rotating wheel of the clamping mechanism stops or starts to stop rotating, the first arc pressing surface of the pressing plate is separated from the outer side of the cam block aligned by the clamping mechanism, the cam block is extended outwards again, the pressing of the clamping jaw block in the third arc pressing surface of the cam block is relieved, the cam block is extended outwards, the clamping jaw block is extended outwards again, the clamping jaw block in the positioning hole of the clamping mechanism is loosened, and discharging is facilitated.

3. The cam clamping device of the laser edge trimmer according to claim 1, wherein: the positioning star wheel assembly is coaxially and fixedly arranged on the front side of the wheel disc of the pressing cam assembly; the rotating disc assembly, the wheel disc and the positioning star wheel assembly are driven by the driving shaft to rotate coaxially and synchronously;

and a plurality of arc positioning grooves are concavely arranged on the circumferential surface of the positioning star wheel assembly, are uniformly distributed in the circumferential direction by taking the driving shaft as a reference, and are in one-to-one alignment fit with the positioning holes of the clamping mechanism.

4. The cam clamping device of the laser edge trimmer according to claim 1, wherein: a first rotating wheel is rotatably arranged at the outer end of the clamping jaw block of the clamping mechanism, and a rotating shaft of the first rotating wheel is parallel to the axis; when the cam block retracts inwards, the first rotating wheel is pressed by the third arc pressing surface to enable the clamping jaw block to retract inwards; when the clamping jaw block is positioned in the second arc pressing surface, the first rotating wheel is pressed by the second arc pressing surface to enable the clamping jaw block to retract inwards.

5. The cam clamping device of the laser edge trimmer according to claim 1, wherein: the outer end of the cam block is rotatably provided with a second rotating wheel, and the rotating shaft of the second rotating wheel is parallel to the driving shaft; when the cam block contacts with the first arc pressing surface of the pressing plate along with the rotation of the wheel disc, the second rotating wheel is pressed by the first arc pressing surface to enable the cam block to retract inwards.

6. The cam clamping device of the laser edge trimmer according to claim 1, wherein: and an air hole is formed in the radial center of the rotating wheel and communicated with the positioning hole.