CN216000156U

CN216000156U - Workpiece clamping device and automatic production line

Info

Publication number: CN216000156U
Application number: CN202121322271.0U
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuxi Lead Intelligent Equipment Co Ltd
Current assignee: Wuxi Lead Intelligent Equipment Co Ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2022-03-11
Anticipated expiration: 2031-06-11

Abstract

The utility model relates to a workpiece clamping device and an automatic production line. The workpiece clamping device comprises a mounting seat, a pressing mechanism and a transmission mechanism. The mounting seat is provided with a positioning part for bearing the U-shaped workpiece, and the bottom of the positioning part is provided with at least two positioning pins matched with the positioning holes of the U-shaped workpiece. The positioning pin of the positioning part is matched with the positioning hole on the U-shaped workpiece, so that the U-shaped workpiece is positioned and transversely limited. Then, the pressing and holding mechanism can be switched to a pressing and holding state under the driving of the transmission mechanism. At this time, the pressing member abuts against the side plate of the U-shaped workpiece and presses the U-shaped workpiece against the bottom of the positioning portion. Therefore, the U-shaped workpiece can be reliably clamped in the positioning part. Moreover, when the workpiece clamping device clamps the U-shaped workpiece, the U-shaped workpiece is not excessively extruded, so that the U-shaped workpiece is not easily damaged.

Description

Workpiece clamping device and automatic production line

Technical Field

The utility model relates to the technical field of mechanical automation, in particular to a workpiece clamping device and an automatic production line.

Background

In the machining process, the U-shaped workpiece is often positioned and clamped. For example, in the assembly process of the cell module, a U-shaped long thin plate is required. Moreover, during assembly, the U-shaped long thin plate needs to be clamped and positioned first, so that subsequent cleaning, gluing and other treatment are convenient to carry out.

U-shaped workpieces, such as U-shaped elongated sheets, typically include a base plate and side plates extending vertically or substantially vertically along opposite sides of the base plate. Because the interior of the U-shaped workpiece is provided with the cavity structure, the integral pressure-bearing capacity of the U-shaped workpiece is poor. Conventional clamping devices employ clamping blocks or jaws to clamp and position the work station. Therefore, when clamping a U-shaped workpiece, the conventional clamping device is easy to damage the workpiece.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a workpiece clamping device capable of effectively avoiding damage to a U-shaped workpiece.

A workpiece clamping device comprising:

the mounting seat is provided with a positioning part for bearing the U-shaped workpiece, and the bottom of the positioning part is provided with at least two positioning pins for matching with the positioning holes of the U-shaped workpiece;

the pressing and holding mechanism comprises a pressing and holding piece, and the pressing and holding mechanism comprises an opening state which enables the pressing and holding piece to form a avoiding position on the positioning part and a pressing and holding state which enables the pressing and holding piece to be abutted against a side plate of the U-shaped workpiece and presses and holds the U-shaped workpiece on the positioning part; and

and the transmission mechanism can drive the pressing and holding mechanism to switch between the pressing and holding state and the opening state.

In one embodiment, the bottom of the positioning part is covered with a flexible cushion layer.

In one embodiment, the pressing mechanism further includes a rotating shaft disposed on the mounting base, the pressing members are disposed on the rotating shaft and spaced apart from each other along an extending direction of the rotating shaft, and the transmission mechanism can drive the rotating shaft to rotate, so that the pressing mechanism is switched between the pressing state and the opening state.

In one embodiment, the pressing mechanism further includes an elastic member, and the elastic member provides an elastic force to the pressing member to enable the pressing mechanism to be maintained in the pressing state.

In one embodiment, the transmission mechanism includes a movable plate and a link structure, the movable plate is slidably disposed on the mounting base and is in transmission connection with the pressing member through the link structure, and the movable plate slides to drive the pressing mechanism to switch between the pressing state and the opening state.

In one embodiment, the pressing mechanism further comprises a profile block arranged on the pressing piece, the profile block is provided with a clamping groove, and when the pressing mechanism is in the pressing state, the clamping groove is clamped with a side plate of the U-shaped workpiece located in the positioning portion.

In one embodiment, rollers are arranged on two opposite sides of the bottom of the mounting seat, and at least two guide holes are formed in the bottom of the mounting seat.

An automated manufacturing line comprising a positioning device for positioning a workpiece clamping device as described in the preferred embodiments above, the positioning device comprising:

the roller type rolling machine comprises a rack, wherein a limiting plate is arranged on one side of the rack, a guide plate extending from the other side of the rack to the limiting plate is further arranged on the rack, and the roller can slide along the guide plate; and

the positioning mechanism comprises a first driving piece and a guide shaft, wherein the first driving piece can drive the guide shaft to extend into or extend out of the guide hole when the workpiece clamping device is abutted to the limiting plate.

In one embodiment, the workpiece clamping device further comprises a second driving element, and when the workpiece clamping device abuts against the limiting plate, the second driving element can abut against the transmission mechanism to drive the pressing mechanism to switch between the pressing state and the opening state.

In one embodiment, the positioning device further comprises a conveying mechanism for driving the roller to slide along the guide plate.

According to the workpiece clamping device, the positioning pin of the positioning part can be matched with the positioning hole in the U-shaped workpiece, so that the U-shaped workpiece can be positioned and transversely limited. Then, the pressing and holding mechanism can be switched to a pressing and holding state under the driving of the transmission mechanism. At this time, the pressing member abuts against the side plate of the U-shaped workpiece and presses the U-shaped workpiece against the bottom of the positioning portion. Therefore, the U-shaped workpiece can be reliably clamped in the positioning part. Moreover, when the workpiece clamping device clamps the U-shaped workpiece, the U-shaped workpiece is not excessively extruded, so that the U-shaped workpiece is not easily damaged.

Drawings

In order to more clearly illustrate the embodiments of the present application 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 application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of a workpiece clamping device in accordance with a preferred embodiment of the present invention;

FIG. 2 is a top view of the workholding fixture of FIG. 1;

FIG. 3 is a left side view of the workholding fixture of FIG. 1;

FIG. 4 is a front view of the positioning device in accordance with the preferred embodiment of the present invention;

FIG. 5 is a top view of the positioning device shown in FIG. 4;

FIG. 6 is a top view of a U-shaped workpiece according to one embodiment;

fig. 7 is a left side view of the U-shaped workpiece of fig. 6.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The utility model provides an automatic production line. The automatic production line may be a cell assembly production line, and the U-shaped workpiece 300 shown in fig. 6 and 7, such as a U-shaped long thin plate, is required to be used in the working process. The U-shaped workpiece 300 includes a bottom plate 310 and two side plates 320, and the bottom plate 310 is provided with a positioning hole 311. The side plates 320 are disposed on opposite sides of the base plate 310 to form a U-shaped cross-section of the U-shaped workpiece 300.

Referring to fig. 1, the present invention further provides a workpiece clamping device 100. The automatic production line needs to be matched with the workpiece clamping device 100 during operation. Specifically, the workpiece clamping device 100 is used to position and clamp the U-shaped workpiece 300.

The automatic production line comprises a positioning device 200 shown in fig. 4 to 5, wherein the positioning device 200 is used for positioning the workpiece clamping device 100. During processing, the workpiece clamping device 100 is positioned on the positioning device 200, and then the U-shaped workpiece 300 is clamped on the workpiece clamping device 100, so that the initial position of the U-shaped workpiece 300 in the automatic production line can be calibrated.

Referring to fig. 2 and 3, a workpiece clamping device 100 according to a preferred embodiment of the present invention includes a mounting base 110, a pressing mechanism 120, and a transmission mechanism 130.

The mounting base 110 is used for supporting and is generally formed by splicing metal plates and rods. The mount 110 is formed with a positioning portion 101 for carrying the U-shaped workpiece 300. When the U-shaped workpiece 300 is placed on the positioner 101, the bottom plate 310 thereof contacts the bottom of the positioner 101. To better support the U-shaped workpiece 300, the mounting base 110 is configured as an elongated bar

The bottom of the positioning portion 101 is provided with at least two positioning pins 111 for cooperating with the positioning holes 311 of the U-shaped workpiece 300. The positioning pins 111 extend in a direction perpendicular or approximately perpendicular to the bottom of the positioning portion 101, the number of the positioning holes 311 on each U-shaped workpiece 300 is at least two, and the positioning pins 111 are inserted into the positioning holes 311 to position the U-shaped workpieces 300. Specifically, in the present embodiment, there are two positioning holes 311 and two positioning pins 111, so that the U-shaped workpiece 300 is positioned in the positioning portion 101 by way of two pins.

Specifically, in the present embodiment, the bottom of the positioning portion 101 is covered with a flexible cushion layer 112. The flexible cushion 112 may be formed of a material having a hardness lower than that of metal, such as plastic, resin, or rubber, and may be fixed to the bottom of the positioning portion 101 by bonding or the like. Obviously, to achieve the positioning function, the positioning pin 111 should protrude from the surface of the flexible pad layer 112.

The flexible cushion 112 directly contacts the U-shaped workpiece 300 placed in the positioning part 101, so that the bottom plate 310 can be effectively prevented from being scratched. Moreover, the flexible cushion layer 112 can play a role of buffering, thereby preventing the collision from generating pollutants such as metal dust.

The pressing mechanism 120 includes a pressing member 121. The pressing mechanism 120 includes an open state and a pressing state. Moreover, the transmission mechanism 130 can drive the pressing mechanism 120 to switch between the pressing state and the opening state. In the opened state, the pressing mechanism 120 causes the pressing member 121 to form a clearance for the positioning portion 101. Thus, the U-shaped workpiece 300 can be placed in the positioner 101 or taken out of the positioner 101. In the pressed state, the pressing mechanism 120 causes the pressing member 121 to abut against the side plate 320 of the U-shaped workpiece 300 and presses the U-shaped workpiece 300 into the positioning portion 101.

As shown in fig. 3, the pressing member 121 can apply a downward force to the side plate 320, so as to vertically limit the U-shaped workpiece 300. The positioning pin 111 is engaged with the positioning hole 311, and can limit the U-shaped workpiece 300 in the horizontal direction. In this way, the U-shaped workpiece 300 will be reliably clamped within the positioning portion 101.

The pressing member 121 may be a rod-shaped, block-shaped, or elongated plate-shaped structure, and the switching between the open state and the pressing state may be achieved by sliding, rotating, or the like.

In this embodiment, the pressing mechanism 120 further includes a rotating shaft 122, and the rotating shaft 122 is disposed on the mounting base 110. Moreover, the plurality of pressing members 121 are disposed on the rotating shaft 122 and are spaced apart from each other along the extending direction of the rotating shaft 122, and the transmission mechanism 130 can drive the rotating shaft 122 to rotate, so that the pressing mechanism 120 is switched between the pressing state and the opening state.

Specifically, the extending direction of the rotating shaft 122 is the same as the extending direction of the positioning portion 101 and the U-shaped workpiece 300, and may be provided on the mounting base 110 by a mechanism such as a bearing base. The pressing member 121 may be a bar-shaped structure extending along a direction perpendicular to the rotating shaft 122. The plurality of pressing members 121 further disperse the acting points on the U-shaped workpiece 300, thereby facilitating the reliable abutting between the pressing members 121 and the side plates 320.

In order to balance the torque applied to the rotating shaft 122 by the transmission mechanism 130, two transmission mechanisms 130 are generally provided, and the two transmission mechanisms 130 are located at two ends of the mounting base 110 and are in transmission connection with two ends of the rotating shaft 122 respectively.

In addition, the opposite sides of the positioning portion 101 may be respectively provided with a rotating shaft 122. In this way, when the U-shaped workpiece 300 needs to be clamped, the pressing members 121 located at both sides of the positioning portion 101 can respectively apply a pressing force to the two side plates 320, so that the pressing mechanism 120 can press and hold the U-shaped workpiece 300 more reliably.

In this embodiment, the pressing mechanism 120 further includes an elastic member 123, and the elastic member 123 provides an elastic force to the pressing member 121, so that the pressing mechanism 120 can be maintained in a pressing state.

Under the action of the elastic force of the elastic member 123, the pressing member 121 and the side plate 320 of the U-shaped workpiece 300 can be elastically abutted. Therefore, even if the workpiece clamping device 100 vibrates, the elastic member 123 can reliably hold the pressing member 121 and the side plate 320, so that the reliability of the pressing mechanism 120 for pressing the U-shaped workpiece 300 can be improved; on the other hand, when the transmission mechanism 130 switches the belt holding mechanism 120 to the open state, the elastic force of the elastic member 123 does not disappear. Therefore, when the action of the transmission mechanism 130 is lost, the pressing mechanism 120 can be automatically restored to the pressing state by the elastic member 123, thereby facilitating the efficiency improvement in the application of the automatic production line.

The elastic member 123 may be a spring, a leaf spring, or the like. Specifically, in this embodiment, the elastic element 123 is a tension spring, and the rotating shaft 122 is fixedly provided with a fixing column 1221. One end of the tension spring is fixed on the fixing column 1221, and the other end of the tension spring is fixed on the mounting base 110, so that the pressing piece 121 keeps a state of pressing the U-shaped workpiece 300 through elastic tension.

Further, in this embodiment, the transmission mechanism 130 includes a moving plate 131 and a link structure 132, the moving plate 131 is slidably disposed on the mounting base 110 and is in transmission connection with the pressing member 121 through the link structure 132, and the moving plate 131 slides to drive the pressing mechanism 120 to switch between the pressing state and the opening state.

Specifically, the mounting base 110 is provided with a fixing plate 114, and the moving plate 131 is slidably provided on the fixing plate 114. The link structure 132 includes a first link 1321 and a second link 1322 hinged to each other, the other end of the first link 1321 is fixedly connected to the rotating shaft 122, and the other end of the second link 1322 is rotatably connected to the moving plate 131. The moving plate 131 slides and can drive the rotating shaft 122 to rotate through the connecting rod structure 132, thereby realizing the switching of the state of the pressing mechanism 120.

In addition, the moving plate 131 is provided with a pressing block 1311, and the pressing block 1311 protrudes outward relative to the surface of the moving plate 131, so as to be convenient for acting on the moving plate 131 to slide. Moreover, since the pressing mechanism 120 can automatically return to the pressing state under the action of the elastic element 123, only a single-direction pressing force needs to be applied to the pressing block 1311, so that the pressing mechanism 120 can be driven to switch to the open state. Thus, the power mechanism for driving the pressing mechanism 120 to switch states may be disposed separately from the workpiece clamping device 100, which is beneficial to reducing the cost of the workpiece clamping device 100.

As shown in fig. 3, when the moving plate 131 is lifted, the pressure holding mechanism 120 is switched to the open state, and when it is slid downward, the pressure holding mechanism 120 is switched to the pressure holding state. Therefore, during operation, it is only necessary to provide an upward holding force to the workpiece clamping device 100.

Referring to fig. 3 again, in the present embodiment, the pressing mechanism 120 further includes a profiling block 124 disposed on the pressing member 121, the profiling block 124 has a clamping groove 1241, and when the pressing mechanism 120 is in the pressing state, the clamping groove 1241 is clamped with the side plate 320 of the U-shaped workpiece 300 located in the positioning portion 101.

The shaped block 124 may be integrally formed with the holder 121, or may be fixed to the holder 121 by bonding, welding, screwing, or the like. The side plate 320 includes two opposite side surfaces and an end surface connecting the side surfaces. The interior profile of the card slot 1241 matches the exterior profile of the side plate 320. When the side plate 320 is clamped in the clamping groove 1241, the U-shaped workpiece 300 can be better clamped. Moreover, when the U-shaped workpiece 300 is glued, cleaned, etc., the profile block 124 can also provide lateral support for the side plate 320, thereby ensuring that the U-shaped workpiece 300 is not significantly deformed.

Referring to fig. 1 again, in the present embodiment, rollers 113 are disposed on two opposite sides of the bottom of the mounting base 110. Furthermore, at least two guiding holes 102 are opened at the bottom of the mounting seat 110.

Specifically, two rollers 113 are disposed on each side of the mounting seat 110, and the rolling directions of the rollers 113 are the same. The rollers 113 enable the workpiece clamping device 100 to move in a predetermined direction. And the guide holes 102 can be matched with the shaft parts to position the whole workpiece clamping device 100.

The rollers 113 and the guide holes 102 are provided in the mounting base 110 for the purpose of facilitating the positioning of the workpiece clamping device 100 on the positioning device 200. The positioning device 200 is generally fixed to a predetermined position of the automatic production line, and can calibrate the initial position of the workpiece clamping device 100 before the workpiece clamping device 100 enters the production line.

Referring to fig. 4 and 5 again, the positioning device 200 includes a frame 210, a positioning mechanism 220, and a second driving member 230.

The frame 210 is used for supporting purposes and may be similar in structure to the mounting base 110. The frame 210 may have a long bar shape as a whole, and the extending direction of the mounting base 110 is the same. A limit plate 211 is disposed on one side of the frame 210, and a guide plate 212 extending from the other side of the frame 210 to the limit plate 211 is disposed on the frame 210. The limiting plate 211 is located at one side of the frame 210 in the width direction, and the guiding plates 212 are generally located at two opposite ends of the frame 210 and correspond to the positions of the rollers 113 at two sides of the mounting base 110.

Wherein the roller 113 can slide along the guide plate 212. The guide plate 212 is engaged with the roller 113, and can guide the movement of the work clamping device 100, so that the work clamping device 100 can slide along the guide plate 212 to abut against the stopper plate 211. By the cooperation of the guide plate 212 and the limit plate 211, the workpiece clamping device 100 can be preliminarily positioned.

The positioning mechanism 220 includes a first driving member 221 and a guiding shaft 222. The first driving member 211 may be a cylinder and the guide shaft 222 extends generally in the feeding direction of the first driving member 211. When the work clamping device 100 abuts against the stopper plate 211, the guide shaft 222 can be aligned with the guide hole 102 of the mounting seat 110. At this time, the first driving member 221 can drive the guide shaft 222 to extend into or out of the guide hole 102. The guide shaft 222 extends into the guide hole 102 to position the workpiece clamping device 100 in the positioning device 200.

The second driver 230 may also be a cylinder. The second driving member 230 can drive the pressing mechanism 120 to switch between the pressing state and the opening state. Specifically, when the work clamping device 100 abuts against the stopper plate 211 and the guide shaft 222 extends into the guide hole 102, the driving end of the second driving member 230 is aligned with the pressing block 1311. Therefore, the second driving member 230 is extended to push the moving plate 131 to move upward, thereby opening the pressing mechanism 120.

Moreover, the second driving member 230 is not connected to the moving plate 131 of the workpiece clamping device 100, so that the second driving member 230 does not affect the transfer of the workpiece clamping device 100 from the positioning device 200 to the next process.

In this embodiment, the positioning device 200 further includes a conveying mechanism 240, and the conveying mechanism 240 is used for driving the roller 113 to slide along the guide plate 212.

Specifically, the conveying mechanism 240 generally includes a plurality of electric rollers and a conveyor belt, the electric rollers are disposed on the frame 210 at intervals along the conveying direction of the workpiece clamping device 100, and the conveyor belt is sleeved on the electric rollers. When the positioning device 200 positions the work clamping device 100, the entire work clamping device 100 may be supported by the conveyor belt.

Further, in the present embodiment, the rack 210 further includes a first sensor 251 and a second sensor 252. The first sensor 251 is used to detect whether the workpiece clamping device 100 has completely entered the conveying mechanism 240, and the second sensor 252 is used to detect whether the workpiece clamping device 100 is in abutment with the stopper plate 211. The first sensor 251 and the second sensor 252 can be in communication connection with an upper computer controlling the automatic production line, when the workpiece clamping device 100 is detected to completely enter the conveying mechanism 240, the upper computer starts the conveying mechanism 240, and when the workpiece clamping device 100 is detected to abut against the limiting plate 211, the upper computer sequentially starts the positioning mechanism 220 and the second driving part 230, so that the automation degree is improved.

The production flow of the automatic production line is generally described below with reference to fig. 1 to 7:

the workpiece clamping device 100 is transferred to the conveying mechanism 240 by a manipulator or a feeding assembly of a previous process, and the rollers 113 are matched with the guide plate 212; the conveying mechanism 240 is started to make the workpiece clamping device 100 slide along the guide plate 212 to abut against the limit plate 211; the first driving member 221 is started and drives the guiding shaft 222 to extend into the guiding hole 102, so as to integrally position the workpiece clamping device 100 on the positioning device 200; the second driving member 230 lifts the pressing block 1311 upward, thereby switching the pressing mechanism 120 to the open state; then, the U-shaped workpiece 300 can be transferred to the positioning portion 101 by using a transfer mechanism such as a robot, and the positioning pin 111 is engaged with the positioning hole 311; then, the first driving member 221 retracts to retract the guiding shaft 222 from the guiding hole 102, and the second driving member 230 retracts to switch the pressing mechanism 120 to the pressing state under the action of the elastic member 123; finally, the workpiece clamping device 100 can be advanced into the production line and circulated between processes with the clamped U-shaped workpiece 300.

In the workpiece clamping device 100, the positioning pin 111 of the positioning part 101 can be matched with the positioning hole 311 of the U-shaped workpiece 300, so that the U-shaped workpiece 300 can be positioned and transversely limited. Then, the pressing mechanism 120 can be switched to the pressing state by the driving mechanism 130. At this time, the pressing member 121 abuts against the side plate 320 of the U-shaped workpiece 300 and presses the U-shaped workpiece 300 against the bottom of the positioning portion 101. Thus, the U-shaped workpiece 300 can be reliably clamped in the positioning portion 101. Moreover, when the workpiece clamping device 100 clamps the U-shaped workpiece 300, the U-shaped workpiece 300 is not excessively pressed, and thus the U-shaped workpiece 300 is not easily damaged.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A workpiece clamping device, comprising:

the mounting seat (110) is provided with a positioning part (101) for bearing a U-shaped workpiece, and the bottom of the positioning part (101) is provided with at least two positioning pins (111) for being matched with positioning holes (311) of the U-shaped workpiece;

the pressing mechanism (120) comprises a pressing piece (121), and the pressing mechanism (120) comprises an opening state enabling the pressing piece (121) to form a avoiding position on the positioning part (101) and a pressing state enabling the pressing piece (121) to be abutted against a side plate of the U-shaped workpiece and pressing the U-shaped workpiece on the positioning part (101); and

and the transmission mechanism (130) can drive the pressing and holding mechanism (120) to switch between the pressing and holding state and the opening state.

2. The workpiece clamping device according to claim 1, characterized in that the bottom of the positioning part (101) is coated with a flexible cushion (112).

3. The workpiece clamping device according to claim 1, wherein the pressing mechanism (120) further includes a rotating shaft (122) disposed on the mounting base (110), a plurality of pressing members (121) are disposed on the rotating shaft (122) and spaced apart from each other along an extending direction of the rotating shaft (122), and the transmission mechanism (130) can drive the rotating shaft (122) to rotate, so that the pressing mechanism (120) is switched between the pressing state and the opening state.

4. The workpiece clamping device according to claim 1, wherein the clamping mechanism (120) further comprises an elastic member (123), and the elastic member (123) provides an elastic force to the clamping member (121) to enable the clamping mechanism (120) to be maintained in the clamped state.

5. The workpiece clamping device according to claim 3, wherein the transmission mechanism (130) comprises a moving plate (131) and a connecting rod structure (132), the moving plate (131) is slidably disposed on the mounting base (110) and is in transmission connection with the pressing member (121) through the connecting rod structure (132), and the moving plate (131) slides to drive the pressing mechanism (120) to switch between the pressing state and the opening state.

6. The workpiece clamping device according to claim 1, characterized in that the clamping mechanism (120) further comprises a profile block (124) arranged on the clamping member (121), the profile block (124) is provided with a clamping groove (1241), and when the clamping mechanism (120) is in the clamping state, the clamping groove (1241) is clamped with a side plate of the U-shaped workpiece located in the positioning portion (101).

7. The workpiece clamping device as recited in any one of claims 1 to 6, characterized in that rollers (113) are disposed on two opposite sides of the bottom of the mounting seat (110), and at least two guiding holes (102) are disposed on the bottom of the mounting seat (110).

8. An automated production line, comprising a positioning device (200) for positioning a workpiece clamping device (100) according to claim 7, the positioning device (200) comprising:

the device comprises a rack (210), wherein a limiting plate (211) is arranged on one side of the rack (210), a guide plate (212) extending from the other side of the rack (210) to the limiting plate (211) is further arranged on the rack (210), and a roller (113) can slide along the guide plate (212); and

the positioning mechanism (220) comprises a first driving piece (221) and a guide shaft (222), and when the workpiece clamping device is abutted to the limiting plate (211), the first driving piece (221) can drive the guide shaft (222) to extend into or out of the guide hole (102).

9. The automatic production line according to claim 8, further comprising a second driving member (230), wherein when the workpiece clamping device abuts against the limiting plate (211), the second driving member (230) can press the transmission mechanism (130) to drive the pressing mechanism (120) to switch between the pressing state and the opening state.

10. The automated production line according to claim 8, wherein said positioning device further comprises a conveying mechanism (240), said conveying mechanism (240) being adapted to drive said roller (113) to slide along said guide plate (212).