CN215699379U - Workpiece centering and clamping equipment - Google Patents

Abstract

The utility model discloses a workpiece centering and clamping device, which comprises: a support plate for placing a workpiece; the supporting plate is arranged between the first clamping assembly and the second clamping assembly; the left and right centering power driving components are used for synchronously driving the first clamping component and the second clamping component to move towards/away from each other and move for equal distances. By applying the equipment, the left-right centering power driving component drives the first clamping component and the second clamping component to synchronously move and the moving distance is equal to that of the first clamping component and the second clamping component, and a workpiece arranged on the supporting plate is centered left and right with the transverse datum line in the moving process of the first clamping component and the second clamping component; the front and back centering of the workpiece is realized through the front and back centering devices, so that the center of the workpiece is aligned with the preset center, and the workpiece is pre-aligned through the front and back pre-centering devices, so that the centering efficiency of the front and back centering devices is improved.

Description

Workpiece centering and clamping equipment

Technical Field

The utility model relates to the technical field of workpiece centering positioning and clamping, in particular to a workpiece centering and clamping device.

Background

In industries such as industry, building and the like, particularly in the building industry, in some steel structure use scenes, sometimes a plurality of sections of square pipes and a plurality of connecting pieces (such as castings, machined parts and other parts) need to be welded to form a longer welding finished product with new characteristics for assembling or welding the steel structure. When the existing device centers a welded pipe and a workbench, the robot directly clamps the welded pipe and places the clamped pipe at the designated position of the workbench, but in view of the operation precision of the robot, when the welded pipe deviates from the workbench, the robot needs to clamp the welded pipe again and leave the workbench and recalculate an operation path, and then the workbench and the welded pipe are centered, so that the operation is complex, and the centering precision is low.

SUMMERY OF THE UTILITY MODEL

In view of the above, a first object of the present invention is to provide a workpiece centering and clamping device, which can quickly center a welding workpiece and a datum line, simplify the centering step, improve the centering accuracy, and have a simple structure and are easy to install.

In order to achieve the first object, the utility model provides the following technical scheme:

a workpiece centering and clamping device comprises:

a support plate for placing a workpiece;

the supporting plate is arranged between the first clamping assembly and the second clamping assembly;

and the left and right centering power driving assemblies are used for synchronously driving the first clamping assembly and the second clamping assembly to move towards/away from each other and move for equal distances.

Preferably, the method further comprises the following steps:

the device comprises a front and rear pre-centering device used for carrying out front and rear pre-centering on the workpiece and a front and rear centering device used for carrying out front and rear centering on the center of the workpiece and a preset center, wherein the front and rear pre-centering device and the front and rear centering device are respectively vertical to the transverse datum line.

Preferably, the front and rear centering device includes:

a front and rear centering mounting plate movable in a direction approaching/separating from the support plate;

the first front and rear clamping assemblies and the second front and rear clamping assemblies are arranged on the front and rear centering mounting plates in parallel, and the center lines of the first front and rear clamping assemblies and the second front and rear clamping assemblies are perpendicular to the transverse datum line;

and the front and rear centering power driving assembly is used for driving the first front and rear clamping assembly and the second front and rear clamping assembly to move in an opposite/opposite direction and move at equal distances.

Preferably, the front and rear centering power driving assemblies are parallel gas claws, and two extending ends of the parallel gas claws are fixedly connected with the first front and rear clamping assemblies and the second front and rear clamping assemblies respectively.

Preferably, the front and rear pre-centering device comprises:

the pre-positioning baffle plate assembly and the pre-positioning push plate assembly are arranged at two ends of the supporting plate along the direction of the transverse datum line, and the pre-positioning push plate assembly can push a workpiece on the supporting plate to move to be in contact with the pre-positioning baffle plate assembly for pre-centering front and back;

the second upper pushing force driving assembly is used for driving the pre-positioning push plate assembly to move along the vertical direction.

Preferably, the device further comprises a mounting plate; control centering power drive assembly locate on the mounting panel, control centering power drive assembly and include:

a left and right centering cylinder;

the left positioning cylinder and the right positioning cylinder are fixedly connected with the driving rack;

the first linear slide rail mechanism and the second linear slide rail mechanism are arranged in parallel and are respectively perpendicular to the transverse datum line.

Preferably, the first clamping assembly and the second clamping assembly each comprise:

clamping the mounting plate left and right;

the plurality of is located along the straight line respectively the gyro wheel unit of the tip of controlling the centre gripping mounting panel, arbitrary the gyro wheel unit with the tip edge parallel and level of controlling the centre gripping mounting panel is in order to contact with the work piece.

Preferably, the pressing device is moved in a vertical direction and presses the workpiece against the support plate, and the pressing device includes:

the device comprises a pressing cylinder and a pressing block fixed with the extending end of the pressing cylinder.

Preferably, the preset center is a center of the support plate.

The utility model provides a workpiece centering and clamping device, which comprises: a support plate for placing a workpiece; the supporting plate is arranged between the first clamping assembly and the second clamping assembly; the left and right centering power driving components are used for synchronously driving the first clamping component and the second clamping component to move towards/away from each other and move for equal distances.

Compared with the prior art, the workpiece centering and clamping equipment provided by the utility model has the following technical effects:

firstly, a left-right centering power driving assembly drives a first clamping assembly and a second clamping assembly to move synchronously, the moving distance of the first clamping assembly and the moving distance of the second clamping assembly are equal, and a workpiece arranged on a supporting plate is centered with a transverse datum line in the moving process of the first clamping assembly and the second clamping assembly;

secondly, the front and back centering of the workpiece is realized through the front and back centering devices, so that the center of the workpiece is aligned with a preset center, and the workpiece is pre-aligned through the front and back pre-centering devices, so that the centering efficiency of the front and back centering devices is improved;

thirdly, the centered workpiece is pressed through the pressing device so as to be clamped and prevented from shifting, and subsequent welding operation is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic partial structural view of a workpiece centering and clamping device according to a first embodiment of the present invention;

fig. 2 is a schematic overall structural diagram of a workpiece centering and clamping device according to a first embodiment of the present invention;

fig. 3 is a schematic partial structural view of a workpiece centering and clamping device according to a second embodiment of the present invention;

FIG. 4 is a side view of the structure of FIG. 3;

fig. 5 is a schematic overall structure diagram of a workpiece centering and clamping device according to a third embodiment of the present invention;

fig. 6 is a side view of the structure of fig. 5.

The drawings are numbered as follows:

the device comprises a left centering cylinder 1, a right centering cylinder 2, a left clamping mounting plate 2, a roller unit 3, a rib plate 4, a second linear slide rail mechanism 5, a mounting plate 6, a first linear slide rail mechanism 7, a supporting plate 8, a transition gear 9, a driving rack 10, a driven rack 11, a front centering cylinder 12, a rear centering cylinder 12, a linear slide rail mechanism 13, a front centering mounting plate 14, a rear centering mounting plate 14, parallel gas claws 15, a first front clamping assembly 16, a second front clamping assembly 17, a first upper driving force driving assembly 18, a second upper driving force driving assembly 19, a pre-positioning baffle assembly 20, a pre-positioning push plate assembly 21, a pressing cylinder 22, a pressing block 23 and a pressing and pushing cylinder 24;

a pushing cylinder 211 and a pushing plate 212.

Detailed Description

The embodiment of the utility model discloses workpiece centering and clamping equipment, which can quickly center a welding workpiece and a datum line, simplify centering steps, improve centering precision, and is simple in structure and convenient to set.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, 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.

Referring to fig. 1 to 6, fig. 1 is a schematic partial structure view of a workpiece centering and clamping apparatus according to a first embodiment of the present invention; fig. 2 is a schematic overall structural diagram of a workpiece centering and clamping device according to a first embodiment of the present invention; fig. 3 is a schematic partial structural view of a workpiece centering and clamping device according to a second embodiment of the present invention; FIG. 4 is a side view of the structure of FIG. 3; fig. 5 is a schematic overall structure diagram of a workpiece centering and clamping device according to a third embodiment of the present invention; fig. 6 is a side view of the structure of fig. 5.

In a specific embodiment, the workpiece is a welded pipe, and the tool centering and clamping device is applied to a welded pipe production line as an example. The utility model provides a workpiece centering and clamping device which comprises a supporting plate 8, a first clamping assembly, a second clamping assembly and a left and right centering power driving assembly. The supporting plate 8 is used for placing a workpiece, and the supporting plate 8 is arranged between the first clamping component and the second clamping component; the support plate 8 is preferably a rectangular plate of regular shape, which is fixed in position and the first and second clamping assemblies move relative to the support plate 8. The first clamping assembly and the second clamping assembly are arranged in parallel and symmetrically on two sides of the transverse datum line, preferably on two sides of a vertical plane where the transverse datum line is located, so that the first clamping assembly and the second clamping assembly can be arranged conveniently. The transverse datum line is preferably a central line of the workpiece centering and clamping device in the length direction, and the central line of the workpiece centering and clamping device, namely the workpiece, is collinear with the central line of the workpiece centering and clamping device for centering. First centre gripping subassembly and second centre gripping subassembly are preferred to be the same setting of structure, if set up to the gripper jaw, control centering power drive assembly and be used for driving first centre gripping subassembly and second centre gripping subassembly in step/back of the body motion and the migration distance equals, through controlling centering power drive assembly to drive two gripper jaws synchronous to the direction removal that is close to horizontal datum line to realize centering about the work piece, and through synchronous motion shorten control centering time, improve control centering efficiency.

In one embodiment, still include mounting panel 6, backup pad 8, first centre gripping subassembly, second centre gripping subassembly and control centering power drive assembly equally divide and do not set up on mounting panel 6, can set up mounting bracket or other structures in the below of mounting panel 6, so that the height of mounting panel 6 can satisfy the design needs, preferably, set up two vertical boards on mounting panel 6 respectively, two vertical boards set up respectively and set up the both ends at backup pad 8 along horizontal datum line direction, and fix through the screw with backup pad 8 respectively, in order to guarantee the rigidity of backup pad 8.

In order to realize the centering of the center of the workpiece and the preset center, the device further comprises:

the device comprises a front and rear pre-centering device used for carrying out front and rear pre-centering on the workpiece and a front and rear centering device used for carrying out front and rear centering on the center of the workpiece and a preset center, wherein the front and rear pre-centering devices and the front and rear centering device are respectively vertical to a transverse datum line. Wherein, the structure of centering device can refer to first centre gripping subassembly, second centre gripping subassembly and control centering power drive assembly's structure and set up around to in production and processing. It can be understood that the front-back direction is set based on the length direction of the transverse datum line, and the front-back pre-centering device firstly performs rough alignment on the workpiece and then performs accurate alignment through the front-back centering device. In order that the front and rear centering devices can clamp the workpiece, the front and rear pre-centering devices are arranged on the inner sides of the front and rear centering devices along the transverse datum line, so that the front and rear centering devices can clamp the workpiece after the front and rear pre-centering devices are aligned.

Compared with the prior art, the workpiece centering and clamping equipment provided by the utility model has the following technical effects:

firstly, the left-right centering power driving assembly drives the first clamping assembly and the second clamping assembly to synchronously move and the moving distance is equal to that of the first clamping assembly and the second clamping assembly, and a workpiece arranged on the supporting plate 8 is centered with a transverse datum line in the moving process of the first clamping assembly and the second clamping assembly;

secondly, the front and back centering of the workpiece is realized through the front and back centering devices, so that the center of the workpiece is aligned with a preset center, and the workpiece is pre-aligned through the front and back pre-centering devices, so that the centering efficiency of the front and back centering devices is improved;

thirdly, the centered workpiece is pressed through the pressing device so as to be clamped and prevented from shifting, and subsequent welding operation is facilitated.

Specifically, in order to carry out left-right synchronous centering on a workpiece, the left-right centering power driving assembly comprises:

a left and right centering cylinder 1;

a group of driving racks 10 and driven racks 11 which are arranged in parallel, and transition gears 9 arranged between the driving racks 10 and the driven racks 11, wherein left and right positioning cylinders are fixedly connected with the driving racks 10;

the first linear slide rail mechanism 7 is arranged between the driving rack 10 and the mounting plate 6, the second linear slide rail mechanism 5 is arranged between the driven rack 11 and the mounting plate 6, and the first linear slide rail mechanism 7 and the second linear slide rail mechanism 5 are arranged in parallel and are respectively and vertically arranged with the transverse datum line.

The driving rack 10 and the driven rack 11 have the same structure, the transition gear 9 is arranged between the driving rack 10 and the driven rack 11 and respectively meshed with the driving rack 10 and the driven rack 11, the driving rack 10 and the driven rack 11 are respectively provided with a step surface for supporting the transition gear 9, furthermore, a support rod is arranged between the transition gear 9 and the mounting plate 6, and the support rod is sleeved on the transition gear 9 to support the transition gear 9. It can be understood that, when the driving rack 10 moves under the driving of the left and right centering power driving components, the transition gear 9 rotates along the axis of itself to drive the driven rack 11 to move, the moving directions of the driving rack 10 and the driven rack 11 are opposite, and the moving distances of the driving rack 10 and the driven rack 11 are equal, so as to ensure that the distances between the first clamping component and the second clamping component and the transverse reference line are equal, so as to drive the first clamping component and the second clamping component to move synchronously and realize the left and right centering of the workpiece. Furthermore, the first linear sliding rail mechanism 7 and the second linear sliding rail mechanism 5 have the same structure, and the first linear sliding rail mechanism 7 is taken as an example for description, and includes a sliding rail and a sliding block matched with the sliding rail, and the sliding block is fixed with the first clamping component to drive the first clamping component to move.

In order to adapt to the height of the workpiece, a supporting piece can be arranged between the first clamping assembly and the sliding block, and the supporting piece can be arranged according to requirements, such as a rib plate 4 and other structures. In other embodiments, the structure of the left and right centering power driving assembly can be set by self, as long as the same technical effect can be achieved; preferably, the first clamping assembly is detachably and fixedly connected with the first linear sliding rail mechanism 7, the second clamping assembly and the second linear sliding rail mechanism 5 respectively; such as by threaded fasteners. Meanwhile, in order to make the mounting plate 6 compact in structure, the left and right centering cylinders 1 and the front and rear centering devices are respectively arranged on the mounting plate 6 and on both sides of the transverse datum line.

In this embodiment, for convenience of installation, the first clamping assembly and the second clamping assembly have the same structure, and preferably, each of the first clamping assembly and the second clamping assembly includes a left clamping mounting plate 2, a right clamping mounting plate 2 and a plurality of roller units 3. The plurality of roller units 3 are respectively arranged on the end edges of the left and right clamping mounting plates 2 along straight lines, and it can be understood that the end edges of the left and right clamping mounting plates 2 are edges for clamping workpieces left and right; the roller unit 3 comprises a rolling shaft and rollers arranged at two ends of the rolling shaft, the rollers are connected with the rolling shaft through bearings, the left clamping mounting plate and the right clamping mounting plate 2 are provided with rolling shaft mounting holes for mounting the rolling shaft, the rolling shaft mounting holes are in clearance fit, and the rolling shaft mounting holes are preferably arranged in the vertical direction. Meanwhile, the end edges of any roller unit 3 and the left and right clamping mounting plates 2 are flush with each other to be in contact with the workpiece, so that after the left and right centering of the workpiece is completed by the first clamping assembly and the second clamping assembly, the workpiece is subjected to micro-pressure pressing for pre-positioning through the roller unit 3 and the end walls of the left and right clamping mounting plates 2, the front and back direction movement of the workpiece can be realized in the front and back centering process of the front and back centering device, the friction force between the workpiece and the end walls of the left and right clamping mounting plates 2 is reduced through the roller unit 3, and the workpiece can move back and forth conveniently. In one embodiment, the number of the roller units 3 is four, and two roller units 3 are respectively disposed at both ends of the left and right clamping mounting plates 2 in the transverse reference line direction.

Further, in order to realize the front-back centering of the workpiece, the front-back centering device comprises a front-back centering mounting plate 14, a first front-back clamping assembly 16, a second front-back clamping assembly 17 and a front-back centering power driving assembly, wherein the front-back centering mounting plate 14, the first front-back clamping assembly 16 and the second front-back clamping assembly 17 can move in the direction close to/far from the supporting plate 8, and the front-back centering power driving assembly is used for driving the first front-back clamping assembly 16 and the second front-back clamping assembly 17 to move towards/away from each other and move for the same distance.

A linear power driving assembly is arranged between the front and rear centering mounting plates 14 and the mounting plate 6 and comprises a front and rear centering cylinder 12 and a linear slide rail mechanism 13, the front and rear centering cylinder 12 is fixedly connected with the front and rear centering mounting plates 14 and moves along the front and rear centering mounting plates 14 along the linear slide rail mechanism 13 to the direction close to or far away from the support plate 8 so as to abdicate the welding or other processes of workpieces after front and rear centering; the linear slide rail mechanism 13 is arranged in parallel to the first linear slide rail mechanism 7 and the second linear slide rail mechanism 5 of the left-right centering power driving assembly. Preferably, the first front and rear clamping assemblies 16 and the second front and rear clamping assemblies 17 are arranged in parallel on the front and rear centering mounting plates 14 with the center lines perpendicular to the transverse reference line, and the front and rear centering mounting plates 14 are arranged in the vertical direction. In one embodiment, the structures of the first front-back clamping assembly 16 and the second front-back clamping assembly 17 can be configured with reference to the structures of the first clamping assembly and the second clamping assembly, and are not described herein again. Or, the front and rear centering power driving assembly is a parallel gas claw 15, and two extending ends of the parallel gas claw 15 are fixedly connected with a first front and rear clamping assembly 16 and a second front and rear clamping assembly 17 respectively; the first front and rear clamping components 16 and the second front and rear clamping components 17 are respectively arranged as clamping plates so as to increase the contact area with a workpiece and optimize the front and rear centering effect.

The workpiece is centered by the left-right centering device and the front-rear centering device, and it can be understood that the intersection point of the center lines of the first front-rear clamping assembly 16 and the second front-rear clamping assembly 17 and the transverse reference line is the preset center, which is a fixed point. Preferably, the preset center is the center of the support plate 8, so that the whole device is conveniently arranged and the installation error is reduced.

In this particular embodiment, the front and rear pre-centering device comprises:

the pre-positioning baffle plate assembly 20 and the pre-positioning push plate assembly 21 are arranged at two ends of the supporting plate 8 along the direction of the transverse datum line, and the pre-positioning push plate assembly 21 can push a workpiece on the supporting plate 8 to move to be in contact with the pre-positioning baffle plate assembly 20 for front and back pre-centering;

a first upper pushing force driving assembly 18 for driving the pre-positioning baffle assembly 20 to move along the vertical direction and a second upper pushing force driving assembly 19 for driving the pre-positioning push plate assembly 21 to move along the vertical direction.

The pre-positioning baffle assembly 20 comprises a horizontal plate and a vertical plate fixed with the horizontal plate, the vertical plate is used for blocking a workpiece, and the first upper driving force driving assembly 18 drives the pre-positioning baffle assembly 20 to move for a preset distance along the vertical direction, so that the horizontal plate and the support plate 8 are positioned on the same horizontal plane; the pre-positioning push plate assembly 21 comprises a front pre-centering cylinder and a rear pre-centering cylinder and a push plate 212, the front pre-centering cylinder and the rear pre-centering cylinder are arranged along the horizontal direction, and in order to realize the connection between the second upper pushing force driving assembly 19 and the pre-positioning push plate assembly 21, a push plate adapter, such as an L-shaped plate, is arranged between the front pre-centering cylinder and the rear pre-positioning push plate assembly to provide a space for the installation of the pre-positioning push plate assembly 21; similarly, a flapper adapter is provided between the first upper thrust driver assembly 18 and the pre-positioned flapper assembly 20. First upper pushing force driving assembly 18 and second upper pushing force driving assembly 19 are preferably identical in structure and both include a cylinder and a linear slide mechanism. In other embodiments, only one cylinder may be provided to achieve the vertical movement of the pre-positioning baffle assembly 20 and the pre-positioning push plate assembly 21, so as to save cost. The workpiece can pass through the supporting plate 8 and the horizontal plate in sequence under the pushing of the pre-positioning push plate assembly 21 until the workpiece is contacted and stopped with the vertical plate, and it can be understood that the two ends of the workpiece are positioned at the inner sides of the first front-back clamping assembly 16 and the second front-back clamping assembly 17, so that the front-back pre-positioning of the workpiece is realized.

On the basis of the above-described embodiments, in order to press the centered workpiece, the apparatus further includes a pressing device that moves in the vertical direction and presses the workpiece against the support plate 8,

the pressing device is arranged on the mounting plate 6, and can move relative to the supporting seat in order to give way for subsequent operation of a workpiece after being pressed, if the air cylinder and the linear slide rail mechanism are arranged, the sliding direction of the pressing device is perpendicular to the supporting seat, and the specific arrangement mode can refer to the sliding arrangement mode of the front centering mounting plate 14 and the back centering mounting plate 8. The pressing device comprises a pressing cylinder 22 and a pressing block 23 fixed with the extending end of the pressing cylinder 22, and one side wall of the pressing block 23, which is in contact with the workpiece, is a horizontal wall.

The specific working process is as follows: before manual feeding of workpieces, the first upper pushing force driving assembly 18 is used for ventilating, the pre-positioning baffle is pushed to ascend through the baffle adapter, and a vertical plate of the pre-positioning baffle is higher than the supporting plate 8 to play a role in blocking and primary positioning; in addition, the vertical plate is arranged on the inner sides of the first front-back clamping assembly 16 and the second front-back clamping assembly 17, and pre-positions the front-back positioning of the workpiece; the second upper pushing force driving assembly 19 pushes the pre-positioning push plate assembly 21 to move upwards along the linear slide rail mechanism through the push plate adaptor, so that the pushing plate 212 in the front of the pre-positioning push plate assembly can be over against the workpiece, and after the device is in place, the workpiece is manually placed above the supporting plate 8;

firstly, performing front and back initial positioning, ventilating a pushing cylinder 211 of a pre-positioning push plate assembly 21, pushing a workpiece by a pushing plate 212 to move forwards until the workpiece touches a vertical plate to stop, then retracting the pre-positioning push plate assembly 21, and retracting a second upper pushing force driving assembly 19 after retraction to give way for welding; synchronously, the pre-positioning baffle assembly 20 and the first upper pushing force driving assembly 18 retract to complete front and rear pre-positioning;

the left and right centering cylinders 1 are ventilated, and sequentially pass through the driving rack 10, the left and right clamping mounting plates 2 and the roller units 3 arranged on the driving rack, and the driving rack 10 and the transition gear 9 to drive the driven rack 11 and the left and right clamping mounting plates 2 and the roller units 3 on the driven rack to move, so that the roller units 3 on the two sides synchronously move towards the middle, and the left and right centering positioning of the workpiece is realized; after the positioning is finished, the left and the right are kept in a clamping state. Then, front-back centering positioning is carried out, before the front-back centering positioning is realized, the parallel gas claws 15 are opened firstly, so that the distance between the first front-back clamping component 16 and the second front-back clamping component 17 is larger than the length of the workpiece, the front-back centering cylinder 12 is ventilated to drive the front-back centering mounting plate 14 to move towards the direction close to the workpiece until the first front-back clamping component 16 and the second front-back clamping component 17 are over against the front-back end wall of the workpiece; then the parallel gas claw 15 is ventilated, the first front-back clamping component 16 and the second front-back clamping component 17 synchronously move towards the middle until the front-back end face of the workpiece is touched, and the first front-back clamping component 16 and the second front-back clamping component 17 synchronously move under the driving of the parallel gas claw 15, so that the action consistency is high, and the front-back positioning of the workpiece is realized. It can be understood that the left-right centering positioning is in a pressing state at this time, and the friction force is not large because the left-right centering positioning is pressed by the rollers and is in line contact with two side surfaces of the workpiece. Therefore, the parallel gas claw 15 can move under the condition that the workpiece is pressed by the roller, and front-back centering positioning is realized.

After the front and rear centering positioning is finished, the pressing and pushing cylinder 24 is pressed to ventilate, the pressing device moves towards the direction of the workpiece until the pressing block 23 moves right above the workpiece, then the pressing cylinder 22 is pressed to ventilate, the pressing block 23 is pressed down until the pressing block is tightly pressed on the workpiece, after the pressing, the parallel gas claws 15 are opened, the front and rear centering cylinder 12 is ventilated to bring the parallel gas claws 15 back to the initial position, then the parallel gas claws 15 are folded to give way for welding, and therefore left and right, front and rear centering positioning and pressing actions of the workpiece are finished.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims (9)

1. A workpiece centering and clamping device is characterized by comprising:

a support plate for placing a workpiece;

the supporting plate is arranged between the first clamping assembly and the second clamping assembly;

and the left and right centering power driving assemblies are used for synchronously driving the first clamping assembly and the second clamping assembly to move towards/away from each other and move for equal distances.

2. The workpiece centering and clamping device as claimed in claim 1, further comprising:

the device comprises a front and rear pre-centering device used for carrying out front and rear pre-centering on the workpiece and a front and rear centering device used for carrying out front and rear centering on the center of the workpiece and a preset center, wherein the front and rear pre-centering device and the front and rear centering device are respectively vertical to the transverse datum line.

3. The workpiece centering and clamping device as claimed in claim 2, wherein the front and rear centering means comprises:

a front and rear centering mounting plate movable in a direction approaching/separating from the support plate;

the first front and rear clamping assemblies and the second front and rear clamping assemblies are arranged on the front and rear centering mounting plates in parallel, and the center lines of the first front and rear clamping assemblies and the second front and rear clamping assemblies are perpendicular to the transverse datum line;

and the front and rear centering power driving assembly is used for driving the first front and rear clamping assembly and the second front and rear clamping assembly to move in an opposite/opposite direction and move at equal distances.

4. The workpiece centering and clamping device as claimed in claim 3, wherein the front and rear centering power driving assemblies are parallel gas claws, and two extending ends of the parallel gas claws are fixedly connected with the first front and rear clamping assemblies and the second front and rear clamping assemblies respectively.

5. The workpiece centering and clamping device as claimed in claim 2, wherein the front and rear pre-centering means comprises:

the pre-positioning baffle plate assembly and the pre-positioning push plate assembly are arranged at two ends of the supporting plate along the direction of the transverse datum line, and the pre-positioning push plate assembly can push a workpiece on the supporting plate to move to be in contact with the pre-positioning baffle plate assembly for pre-centering front and back;

the second upper pushing force driving assembly is used for driving the pre-positioning push plate assembly to move along the vertical direction.

6. The workpiece centering and clamping device as claimed in claim 2, further comprising a mounting plate; control centering power drive assembly locate on the mounting panel, control centering power drive assembly and include:

a left and right centering cylinder;

the left and right centering cylinders are fixedly connected with the driving rack;

the first linear slide rail mechanism and the second linear slide rail mechanism are arranged in parallel and are respectively perpendicular to the transverse datum line.

7. The workpiece centering and clamping device of claim 6, wherein said first clamping assembly and said second clamping assembly each comprise:

clamping the mounting plate left and right;

the plurality of is located along the straight line respectively the gyro wheel unit of the tip of controlling the centre gripping mounting panel, arbitrary the gyro wheel unit with the tip edge parallel and level of controlling the centre gripping mounting panel is in order to contact with the work piece.

8. The workpiece centering and clamping device as claimed in any one of claims 2 to 7, further comprising a pressing device which moves in a vertical direction and is used for pressing the workpiece onto the supporting plate, wherein the pressing device comprises:

the device comprises a pressing cylinder and a pressing block fixed with the extending end of the pressing cylinder.

9. The workpiece centering and clamping device as claimed in claim 8, wherein the predetermined center is the center of the support plate.

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