阅读说明：本技术 一种极耳整形机构及其加工方法 (Lug shaping mechanism and processing method thereof ) 是由 何志凌 何志虹 张朝林 徐国栋 于 2021-09-07 设计创作，主要内容包括：本发明公开了一种极耳整形机构及其加工方法,包括机架、定位装置、校正装置,所述校正装置包括相对设置的第一校正装置和第二校正装置,第一校正装置和第二校正装置分别设于第一移动架和第二移动架上。通过第一驱动装置和第二驱动装置实现了第一校正装置和第二校正装置分别朝定位装置方向运动,并使极耳伸入相应的两夹持臂之间,然后第三驱动装置和第四驱动装置以及第五驱动装置和第六驱动装置工作,从而实现了极耳的夹持稳定(夹紧),然后第一校正装置和第二校正装置朝远离定位装置的方向运动,极耳在夹持臂以及倒钩的相互作用下使折叠或弯曲的部分拉直,从而实现了自动化极耳校正。(The invention discloses a lug reshaping mechanism and a processing method thereof, and the lug reshaping mechanism comprises a rack, a positioning device and a correcting device, wherein the correcting device comprises a first correcting device and a second correcting device which are oppositely arranged, and the first correcting device and the second correcting device are respectively arranged on a first movable frame and a second movable frame. The first correction device and the second correction device move towards the direction of the positioning device respectively through the first driving device and the second driving device, the lug extends between the two corresponding clamping arms, then the third driving device, the fourth driving device, the fifth driving device and the sixth driving device work, and therefore stable clamping (clamping) of the lug is achieved, then the first correction device and the second correction device move towards the direction far away from the positioning device, the folded or bent part of the lug is straightened under the interaction of the clamping arms and the barbs, and automatic lug correction is achieved.)

1. A tab reshaping mechanism, comprising:

a frame;

the positioning device is fixedly arranged on the rack and provided with a positioning groove for placing a product;

the correcting device comprises a first correcting device and a second correcting device which are arranged oppositely, the first correcting device and the second correcting device are respectively arranged on a first moving frame and a second moving frame, and the machine frame is respectively provided with a first driving device and a second driving device which drive the first moving frame and the second moving frame to move towards a position close to each other and a position far away from each other;

the first correcting device comprises a first fixed plate fixedly arranged on the first moving frame, a first clamping part and a second clamping part which are pivotally arranged on the first fixed plate, and the first fixed plate is provided with a third driving device and a fourth driving device which drive the first clamping part and the second clamping part to be close to each other;

the second correcting device comprises a second fixed plate fixedly arranged on the second moving frame, a third clamping part and a fourth clamping part which are pivotally arranged on the second fixed plate, and the second fixed plate is provided with a fifth driving device and a sixth driving device which drive the third clamping part and the fourth clamping part to approach each other;

the first clamping part, the second clamping part, the third clamping part and the fourth clamping part are arranged on two sides of the positioning groove relatively.

2. The tab shaping mechanism according to claim 1, wherein: the first clamping part, the second clamping part, the third clamping part and the fourth clamping part have the same structure and comprise a main body part, a clamping arm arranged below the main body part and a pivoting part arranged between the main body part and the clamping arm; when the two clamping arms are close to each other, the end parts of the clamping arms can be abutted against each other to clamp the lug and apply acting force.

3. The tab shaping mechanism according to claim 2, wherein: the end part of the clamping arm is provided with a barb extending towards the direction of the pivoting part, the barb can enclose a correction groove, and the end part of the barb is sharp.

4. The tab shaping mechanism according to claim 2, wherein: the end wall of the clamping arm is provided with a guide groove which is inwards concave, and the guide groove is matched with the width of the lug.

5. The tab shaping mechanism according to claim 1, wherein:

the first moving frame comprises a first guide rail, a first sliding block and a first air cylinder, the first sliding block is slidably mounted on the first guide rail, the first air cylinder drives the first sliding block, and a plurality of first fixing plates are arranged at intervals on the first sliding block;

the second moving frame comprises a second guide rail, a second sliding block and a second air cylinder, the second sliding block is slidably mounted on the second guide rail, the second air cylinder drives the second sliding block, and a plurality of second fixing plates are arranged at intervals on the second sliding block;

the first fixing plate and the second fixing plate are adjacently arranged and can move mutually.

6. The tab shaping mechanism according to claim 2, wherein:

the third driving device and the fourth driving device are respectively a third air cylinder and a fourth air cylinder which are arranged on the first fixing plate, the third air cylinder and the fourth air cylinder are respectively connected with a first sliding seat and a second sliding seat, a first shifting block and a second shifting block are arranged on the first sliding seat and the second sliding seat at intervals, and the first shifting block and the second shifting block can move mutually and drive the first clamping part and the second clamping part to enable the end parts of the two clamping arms to abut against each other;

the fifth driving device and the sixth driving device are respectively a fifth cylinder and a sixth cylinder which are arranged on the second fixing plate, the fifth cylinder and the sixth cylinder are respectively connected with a third sliding seat and a fourth sliding seat, a third shifting block and a fourth shifting block are arranged on the third sliding seat and the fourth sliding seat at intervals, and the third shifting block and the fourth shifting block can move mutually and drive the third clamping part and the fourth clamping part to enable the end parts of the two clamping arms to abut against each other.

7. The tab shaping mechanism according to claim 1, wherein: the constant head tank is equipped with a plurality of and interval settings, the constant head tank is located on the location strip, the location strip is equipped with at least two and interval settings, the constant head tank comprises two inclined planes.

8. The tab shaping mechanism according to claim 7, wherein: the joint end of the two inclined planes is provided with a positioning auxiliary groove which is vertically arranged.

9. A processing method applying a tab reshaping mechanism is characterized by comprising the following steps:

s1: placing the battery in a positioning groove of the positioning device through a mechanical arm or manually;

s2: the first cylinder and the second cylinder are started, and the first fixing plate and the second fixing plate move towards opposite directions, so that the first correcting device and the second correcting device respectively move in the direction of the groove positioning groove, and the tab extends into a space between the first clamping part and the second clamping part and a space between the third clamping part and the fourth clamping part;

s3: the third cylinder and the fourth cylinder are started, so that the first sliding seat and the second sliding seat move relatively, the plurality of first clamping parts and the plurality of second clamping parts swing simultaneously, and the lug on one side of the positioning groove is clamped between the first clamping parts and the second clamping parts;

meanwhile, the fifth cylinder and the sixth cylinder are started, so that the third sliding seat and the fourth sliding seat move relatively, the plurality of third clamping parts and the plurality of fourth clamping parts swing simultaneously, and the lug on the other side of the positioning groove is clamped between the third clamping part and the fourth clamping part;

s4: the first cylinder and the second cylinder are started, the first fixing plate and the second fixing plate move towards opposite directions, and the electrode lugs are smoothed under the limiting action of the first clamping part, the second clamping part, the third clamping part and the fourth clamping part;

s5: the third and fourth cylinders and the fifth and sixth cylinders are activated and the first and second clamping portions and the third and fourth clamping portions are positioned away from each other.

10. The processing method of claim 9, wherein the processing method comprises the following steps: in the step of S3, the user can,

s1: the first clamping part and the second clamping part are respectively provided with a barb, and if the tab has a folded part, the tab can be straightened under the abutment of the barbs and flattened under the abutment of the two clamping arms;

s2: meanwhile, the opposite end parts of the clamping arms are provided with guide grooves, so that the lugs slide along the guide grooves and the positions of the lugs are centered.

Technical Field

The invention relates to the technical field of lithium battery processing, in particular to a lug shaping mechanism and a processing method thereof.

Background

The cylindrical lithium battery is divided into different systems of lithium iron phosphate, lithium cobaltate, lithium manganate and cobalt manganese mixture and ternary materials, the shell is divided into a steel shell and a polymer, and batteries with different material systems have different advantages. At present, the cylinder mainly takes a steel shell cylindrical lithium iron phosphate battery as a main part, and the battery has the characteristics of high capacity, high output voltage, good charge-discharge cycle performance, stable output voltage, capability of heavy current discharge, stable electrochemical performance, safe use, wide working temperature range and environmental friendliness.

The general lithium battery comprises electrolyte, a positive plate and a negative plate, wherein the positive plate and the negative plate generally extend out of a tab, so that subsequent processing and use are realized. However, the thickness of the material of the existing lithium battery can be reduced while the stability of the product is ensured, so that the quality of the lithium battery is effectively reduced. When the thickness of the pole piece is reduced, the thickness of the pole lug is also reduced, so that the pole lug is generally softer, and the pole lug is easy to bend (sometimes, the pole lug inclines left and right); when the bending is serious, the folding condition may occur, so the manual arrangement is generally adopted, and the conditions of incomplete formation, charging fault or discharging fault in the subsequent production and serious short circuit or fire accident can be avoided. However, the manual processing is inefficient.

Disclosure of Invention

The invention mainly aims to provide a lug reshaping mechanism and a processing method thereof, aiming at realizing the position correction of a lug through automatic equipment so as to realize the automatic production of a product and improve the production efficiency.

In order to achieve the above object, the present invention provides a tab shaping mechanism, including:

a frame;

the positioning device is fixedly arranged on the rack and provided with a positioning groove for placing a product;

the correcting device comprises a first correcting device and a second correcting device which are arranged oppositely, the first correcting device and the second correcting device are respectively arranged on a first moving frame and a second moving frame, and the machine frame is respectively provided with a first driving device and a second driving device which drive the first moving frame and the second moving frame to move towards a position close to each other and a position far away from each other;

the first correcting device comprises a first fixed plate fixedly arranged on the first moving frame, a first clamping part and a second clamping part which are pivotally arranged on the first fixed plate, and the first fixed plate is provided with a third driving device and a fourth driving device which drive the first clamping part and the second clamping part to be close to each other;

the second correcting device comprises a second fixed plate fixedly arranged on the second moving frame, a third clamping part and a fourth clamping part which are pivotally arranged on the second fixed plate, and the second fixed plate is provided with a fifth driving device and a sixth driving device which drive the third clamping part and the fourth clamping part to approach each other;

the first clamping part, the second clamping part, the third clamping part and the fourth clamping part are arranged on two sides of the positioning groove relatively.

Preferably, the first clamping part, the second clamping part, the third clamping part and the fourth clamping part have the same structure and comprise a main body part, a clamping arm arranged below the main body part and a pivoting part arranged between the main body part and the clamping arm; when the two clamping arms are close to each other, the end parts of the clamping arms can be abutted against each other to clamp the lug and apply acting force.

Preferably, the end of the clamping arm is provided with a barb extending towards the direction of the pivot part, the barb can enclose the correction groove, and the end of the barb is sharp.

Preferably, the end wall of the clamping arm is provided with a guide groove which is recessed inwards, and the guide groove is matched with the width of the tab.

Preferably, the first moving frame comprises a first guide rail, a first slider slidably mounted on the first guide rail, and a first cylinder driving the first slider, and the first slider is provided with a plurality of first fixing plates arranged at intervals; the second moving frame comprises a second guide rail, a second sliding block and a second air cylinder, the second sliding block is slidably mounted on the second guide rail, the second air cylinder drives the second sliding block, and a plurality of second fixing plates are arranged at intervals on the second sliding block; the first fixing plate and the second fixing plate are adjacently arranged and can move mutually.

Preferably, the third driving device and the fourth driving device are respectively a third cylinder and a fourth cylinder arranged on the first fixing plate, the third cylinder and the fourth cylinder are respectively connected with a first sliding seat and a second sliding seat, a first shifting block and a second shifting block are arranged on the first sliding seat and the second sliding seat at intervals, and the first shifting block and the second shifting block can move mutually and drive the first clamping part and the second clamping part and enable the end parts of the two clamping arms to abut against each other; the fifth driving device and the sixth driving device are respectively a fifth cylinder and a sixth cylinder which are arranged on the second fixing plate, the fifth cylinder and the sixth cylinder are respectively connected with a third sliding seat and a fourth sliding seat, a third shifting block and a fourth shifting block are arranged on the third sliding seat and the fourth sliding seat at intervals, and the third shifting block and the fourth shifting block can move mutually and drive the third clamping part and the fourth clamping part to enable the end parts of the two clamping arms to abut against each other.

Preferably, the constant head tank is equipped with a plurality ofly and the interval sets up, the constant head tank is located on the location strip, the location strip is equipped with at least two, and the interval sets up, the constant head tank comprises two inclined planes.

Preferably, the joint end of the two inclined surfaces is provided with a positioning auxiliary groove which is vertically arranged.

A processing method applying a tab reshaping mechanism is characterized by comprising the following steps:

s1: placing the battery in a positioning groove of the positioning device through a mechanical arm or manually;

s2: the first cylinder and the second cylinder are started, and the first fixing plate and the second fixing plate move towards opposite directions, so that the first correcting device and the second correcting device respectively move in the direction of the groove positioning groove, and the tab extends into a space between the first clamping part and the second clamping part and a space between the third clamping part and the fourth clamping part;

s3: the third cylinder and the fourth cylinder are started, so that the first sliding seat and the second sliding seat move relatively, the plurality of first clamping parts and the plurality of second clamping parts swing simultaneously, and the lug on one side of the positioning groove is clamped between the first clamping parts and the second clamping parts;

meanwhile, the fifth cylinder and the sixth cylinder are started, so that the third sliding seat and the fourth sliding seat move relatively, the plurality of third clamping parts and the plurality of fourth clamping parts swing simultaneously, and the lug on the other side of the positioning groove is clamped between the third clamping part and the fourth clamping part;

s4: the first cylinder and the second cylinder are started, the first fixing plate and the second fixing plate move towards opposite directions, and the electrode lugs are smoothed under the limiting action of the first clamping part, the second clamping part, the third clamping part and the fourth clamping part;

s5: the third and fourth cylinders and the fifth and sixth cylinders are activated and the first and second clamping portions and the third and fourth clamping portions are positioned away from each other.

Preferably, in the step of S3,

s1: the first clamping part and the second clamping part are respectively provided with a barb, and if the tab has a folded part, the tab can be straightened under the abutment of the barbs and flattened under the abutment of the two clamping arms;

s2: meanwhile, the opposite end parts of the clamping arms are provided with guide grooves, so that the lugs slide along the guide grooves and the positions of the lugs are centered.

According to the technical scheme, the first correction device and the second correction device respectively move towards the direction of the positioning device through the first driving device and the second driving device, the lug is enabled to extend between the two corresponding clamping arms, then the third driving device, the fourth driving device, the fifth driving device and the sixth driving device work, so that the lug is stably clamped (clamped), then the first correction device and the second correction device move towards the direction far away from the positioning device, and the folded or bent part of the lug is straightened under the interaction of the clamping arms and the barbs, so that automatic lug correction is realized.

Drawings

FIG. 1 is a first perspective view of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic structural diagram of the calibration device;

FIG. 4 is a schematic view of the clamping portion;

FIG. 5 is a schematic diagram of a lithium battery configuration;

FIG. 6 is a top view of the present invention.

In the drawings, 1 is a frame, 2 is a positioning device, 21 is a positioning groove, 22 is a positioning bar, 23 is an inclined surface, 24 is a positioning auxiliary groove, 3 is a first correcting device, 31 is a first fixing plate, 32 is a first holding part, 33 is a second holding part, 4 is a second correcting device, 41 is a second fixing plate, 42 is a third holding part, 43 is a fourth holding part, 5 is a first moving frame, 51 is a first guide rail, 52 is a first slider, 6 is a second moving frame, 61 is a second guide rail, 62 is a second slider, 71 is a main body part, 72 is a holding arm, 73 is a pivot part, 74 is a barb, 75 is a correcting groove, 76 is a guide groove, 81 is a first cylinder, 82 is a second cylinder, 83 is a third cylinder, 84 is a fourth cylinder, 85 is a fifth cylinder, 86 is a sixth cylinder, 91 is a first dial block, 92 is a second dial block, 93 is a third dial block, 94 is a fourth dial block, 95 is a first slide seat, 96 is a second sliding seat, 97 is a third sliding seat, 98 is a fourth sliding seat, 100 is an electrode, 101 is a tab, and 102 is a diaphragm.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that if directional indications (such as … …, which is up, down, left, right, front, back, top, bottom, inner, outer, vertical, transverse, longitudinal, counterclockwise, clockwise, circumferential, radial, axial) are provided in the embodiments of the present invention, the directional indications are only used for explaining the relative position relationship, motion condition, etc. of the components at a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first" or "second", etc. in the embodiments of the present invention, the description of "first" or "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 6, a tab shaping mechanism and a processing method thereof include:

a frame 1;

the positioning device 2 is fixedly arranged on the rack 1, and the positioning device 2 is provided with a positioning groove 21 for placing a product;

the correcting device comprises a first correcting device 3 and a second correcting device 4 which are oppositely arranged, the first correcting device and the second correcting device 4 are respectively arranged on a first moving frame 5 and a second moving frame 6, and the machine frame 1 is respectively provided with a first driving device and a second driving device which drive the first moving frame 5 and the second moving frame 6 to a position close to each other and a position far away from each other;

the first correcting device 3 comprises a first fixed plate 31 fixedly arranged on the first movable frame 5, a first clamping part 32 and a second clamping part 33 which are pivotally arranged on the first fixed plate 31, and the first fixed plate 31 is provided with a third driving device and a fourth driving device which drive the first clamping part 32 and the second clamping part 33 to approach each other;

the second correcting device 4 comprises a second fixed plate 41 fixedly mounted on the second movable frame 6, a third clamping portion 42 and a fourth clamping portion 43 pivotally mounted on the second fixed plate 41, the second fixed plate 41 is provided with a fifth driving device and a sixth driving device for driving the third clamping portion 42 and the fourth clamping portion 43 to approach each other;

the first clamping portion 32 and the second clamping portion, and the third clamping portion 42 and the fourth clamping portion 43 are oppositely disposed at two sides of the positioning slot 21.

The first driving device and the second driving device are used for realizing that the first correcting device 3 and the second correcting device 4 respectively move towards the direction of the positioning device 2 and enabling the lug 101 to extend between the two corresponding clamping arms 72, then the third driving device, the fourth driving device, the fifth driving device and the sixth driving device work, so that the clamping stability (clamping) of the lug 101 is realized, then the first correcting device 3 and the second correcting device 4 move towards the direction far away from the positioning device 2, the folded or bent part of the lug 101 is straightened under the interaction of the clamping arms 72 and the barbs 74, and therefore the automatic correction of the lug 101 is realized.

In the embodiment of the present invention, the first clamping portion 32, the second clamping portion 33, the third clamping portion 42 and the fourth clamping portion 43 have the same structure, and include a main body portion 71, a clamping arm 72 disposed below the main body portion 71, and a pivot portion 73 disposed between the main body portion 71 and the clamping arm 72; when the two clamping arms 72 approach each other, the ends of the clamping arms 72 can abut against each other and clamp the tab 101, and apply a force.

In the present embodiment, the end of the clamping arm 72 is provided with a barb 74 extending toward the pivot 73, the barb 74 may enclose the correction groove 75, and the end of the barb 74 is sharp.

In the embodiment of the present invention, the end wall of the holding arm 72 is provided with a guide groove 76 recessed inward, and the guide groove 76 is adapted to the width of the tab 101.

In the embodiment of the present invention, the first moving frame 5 includes a first guide rail 51, a first slider 52 slidably mounted on the first guide rail 51, and a first cylinder 81 driving the first slider 52, wherein the first slider 52 is provided with a plurality of first fixing plates 31 arranged at intervals; the second moving frame 6 comprises a second guide rail 61, a second sliding block 62 slidably mounted on the second guide rail 61, and a second cylinder 82 for driving the second sliding block 62, wherein the second sliding block 62 is provided with a plurality of second fixed plates 41 arranged at intervals; the first fixing plate 31 and the second fixing plate 41 are disposed adjacent to each other and are movable with respect to each other.

The first fixing plate 31 and the second fixing plate 41 are arranged to realize synchronous movement of the first correcting device 3 and the second correcting device 4, so that the correction rate of the battery is effectively improved, the production efficiency of the battery is improved, and adverse factors of the battery in the processing process are reduced.

In a specific embodiment, the first guide rail 51 and the second guide rail 61 may be provided in plurality, so as to ensure stable operation of the first fixing plate 31 and the second fixing plate 41; of course, in the embodiment, a guide post may be disposed on the frame 1 to further ensure the stable operation of the first fixing plate 31 and the second fixing plate 41.

In the embodiment of the present invention, the third driving device and the fourth driving device are respectively a third air cylinder 83 and a fourth air cylinder 84 disposed on the first fixing plate 31, the third air cylinder 83 and the fourth air cylinder 84 are respectively connected to a first sliding seat 95 and a second sliding seat 96, a first shifting block 91 and a second shifting block 92 are disposed on the first sliding seat 95 and the second sliding seat 96 at intervals, and the first shifting block 91 and the second shifting block can move mutually and drive the first clamping portion 32 and the second clamping portion 33, and make the end portions of the two clamping arms 72 abut against each other;

the fifth driving device and the sixth driving device are respectively a fifth cylinder 85 and a sixth cylinder 86 which are arranged on the second fixing plate 41, the fifth cylinder 85 and the sixth cylinder 86 are respectively connected with a third sliding seat 97 and a fourth sliding seat 98, a third shifting block 93 and a fourth shifting block 94 are arranged on the third sliding seat 97 and the fourth sliding seat 98 at intervals, and the third shifting block 93 and the fourth shifting block can move mutually and drive the third clamping portion 42 and the fourth clamping portion 43, so that the end portions of the two clamping arms 72 are abutted.

The cooperation of first sliding seat 95 and the second sliding seat realizes the simultaneous movement of multiunit first clamping part 32 and second clamping part 33 and third clamping part 42 and fourth clamping part 43, has effectively improved production efficiency.

In the embodiment of the present invention, the positioning grooves 21 are arranged at intervals, the positioning grooves 21 are arranged on the positioning strip 22, the positioning strip 22 is provided with at least two positioning grooves arranged at intervals (an avoiding position is arranged between the two positioning grooves), and the positioning grooves 21 are composed of two inclined surfaces 23.

In the embodiment of the present invention, the joint end of the two inclined surfaces 23 is provided with a positioning auxiliary groove 24 arranged vertically. Therefore, the diaphragm between the two electrodes can be stretched into the positioning auxiliary groove 24, the product can be conveniently placed, meanwhile, the batteries with different diameters can be positioned through the inclined surface 23, and the applicability of the device is effectively improved.

A processing method applying a tab reshaping mechanism comprises the following steps:

s1: placing the battery in the positioning groove 21 of the positioning device 2 by a mechanical arm or a manual work;

s2: the first cylinder 81 and the second cylinder 82 are started, and the first fixing plate and the second fixing plate are moved in opposite directions, so that the first correcting device 3 and the second correcting device 4 are moved in the direction of the groove positioning groove 21, respectively, and the tab 101 is inserted between the first clamping portion 32 and the second clamping portion 33, and the third clamping portion 42 and the fourth clamping portion 43;

s3: the third cylinder 83 and the fourth cylinder 84 are started to make the first sliding seat 95 and the second sliding seat 96 move relatively, and make the plurality of first clamping parts 32 and the plurality of second clamping parts 33 swing simultaneously, and clamp the tab 101 at one side of the positioning groove 21 between the first clamping part 32 and the second clamping part 33;

at the same time, the fifth cylinder 85 and the sixth cylinder 86 are started, so that the third sliding seat 97 and the fourth sliding seat 98 move relatively, the plurality of third clamping portions 42 and the plurality of fourth clamping portions 43 swing simultaneously, and the tab 101 on the other side of the positioning groove 21 is clamped between the third clamping portion 42 and the fourth clamping portion 43;

s4: the first air cylinder 81 and the second air cylinder 82 are started, the first fixing plate and the second fixing plate move towards opposite directions, and the tab 101 is flattened under the limiting action of the first clamping part 32, the second clamping part 33, the third clamping part 42 and the fourth clamping part 43;

s5: the third and fourth cylinders 83 and 84 and the fifth and sixth cylinders 85 and 86 are activated to position the first and second clamping portions 32 and 33 and the third and fourth clamping portions 42 and 43 away from each other.

In the embodiment of the present invention, it is,

s1: the first clamping part 32 and the second clamping part 33 are respectively provided with a barb 74, if the tab 101 has a folded part, the tab 101 can be straightened under the abutment of the barb 74 and flattened under the abutment of the two clamping arms 72;

s2: meanwhile, opposite ends of the holding arms 72 are provided with guide grooves 76 so that the tab 101 slides along the guide grooves 76 and the tab 101 is centered.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.