Plate part conveying mechanism capable of being positioned and used for automatic welding workbench

Abstract

A positionable plate component conveying mechanism used for an automatic welding workbench comprises electric linear sliding tables, a lower bottom plate, electric push rods and a box body and further comprises a left-right displacement mechanism and an elevation angle adjusting mechanism, the lower end of the lower bottom plate is installed on four sliding blocks of the two sets of electric linear sliding tables respectively, and the lower ends of the multiple sets of electric push rods are installed at the upper end of the lower bottom plate respectively. The left-right displacement mechanism comprises an electric push rod A and a push plate, and the electric push rod A is installed outside the box body; one side of the push plate and the front end of the electric push rod A are mounted together; the elevation angle adjusting mechanism comprises an electric push rod B and an adjusting plate; the front side of the adjusting plate is rotationally mounted in the front side of the box body; the lower end of the electric push rod B and the upper end of the lower bottom plate are hinged together, and the upper end of the electric push rod B and the lower part of the adjusting plate are hinged together; the two sets of electric linear sliding tables are installed behind the right end of the rear side of the automatic welding workbench. According to the automatic welding workbench, the probability that the gravity centers of clamped plate parts are not uniform and fall off is reduced, and stable and reliable work of the automatic welding workbench is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment used in welding mechanisms, in particular to a positionable plate component conveying mechanism used in an automatic welding workbench. Background Art

[0002] This automatic welding machine (also known as an automatic welding table) is used in vehicle production and other applications to weld components onto sheet metal (flat panels). Its general structure consists of a six-axis workpiece gripper robot, a PLC or host computer control system, a fixed welding station, a sheet metal conveyor (mounted at the rear right end of the machine), a material rack, and a welding gun. During operation, a worker places the sheet metal into the open-back housing of the sheet metal conveyor using a forklift or manually. The worker then presses the power button. Upon receiving the command signal, the PLC or host computer control system, operating according to its internal program, controls the six-axis workpiece gripper robot to use its gripper to pick up the sheet metal component and place it at the fixed welding station. The robot then controls the six-axis workpiece gripper robot to pick up the component to be welded from the material rack and place it at the corresponding welding station. The robot then controls the welding gun to weld the component to the desired location on the sheet metal. After welding is complete, the control system controls the six-axis workpiece gripper robot to use its gripper to pick up the sheet metal component after welding and place it into the housing of the sheet metal conveyor. The worker then removes the welded product.

[0003] Although existing automatic plate welding workbenches meet welding production needs to a certain extent, their plate component conveying mechanisms are limited by their structure and still have the following technical shortcomings. Specifically, after the plate components are placed in the box of the plate component conveying mechanism, they are generally in a horizontal state, which does not facilitate the six-axis workpiece gripping robot's gripper to grip one end (the rear end) of the plate. The six-axis workpiece gripping robot's motion state is relatively complex, which prolongs the gripping time and is not conducive to improving work efficiency. In addition, since the plate cannot be guaranteed to be located in a fixed position in the box (after the worker places the plate in the box using a forklift or manually, the internal dimensions of the box are larger than the plate dimensions, and the worker's lack of operating experience makes it very likely that the plate will not be located in a fixed position in the box), the control system outputs a fixed control command signal to the six-axis workpiece gripping robot. If the gripper reaches the corresponding workstation, it cannot guarantee that it will grip the middle of the rear end of the plate. This creates a risk that the plate's center of gravity will be uneven after subsequent gripping, and the plate workpiece may sway or even fall when the six-axis workpiece gripping robot is transferred, causing damage to the equipment. In summary, it is very necessary to provide a positionable component conveying mechanism that can effectively ensure that the plate components are in a fixed clamping position in the box and ensure that the automatic welding workbench works stably and reliably. Utility Model Content

[0004] In order to overcome the drawbacks of the existing plate component conveying mechanism of the automatic plate welding workbench due to structural limitations as described in the background, the utility model provides a mature technology based on the application of the automatic welding workbench, and the joint action of a PLC or a host computer control system. After the staff puts the plate into the box, the internal plate can be automatically pushed to the left and right, and the plate can be adjusted to a vertical state with a large elevation angle. The six-axis workpiece clamping robot clamp of the automatic welding workbench can accurately clamp the middle position of the upper end of the plate workpiece to the welding fixed station in a relatively short time, preventing the uneven center of gravity of the plate components after clamping, the workpiece shaking left and right when the six-axis workpiece clamping robot transfers the plate, and even the chance of falling. It is a positionable plate component conveying mechanism used in the automatic welding workbench.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A locatable plate component conveying mechanism used in an automatic welding workbench comprises an electric linear slide, a lower base plate, an electric push rod and a box body, and is characterized in that it also has a left and right displacement mechanism and an elevation adjustment mechanism. The electric linear slide has at least two sets, each set of electric linear slides has two sliding blocks that move in the same direction and are spaced apart. The lower end of the lower base plate is respectively mounted on the four sliding blocks of the two sets of electric linear slides. There are multiple sets of electric push rods, and the lower ends of the multiple sets of electric push rods are respectively mounted around the upper end of the lower base plate. The lower end of the box body is mounted on the upper ends of the multiple sets of electric push rods. The upper end and rear side end of the box body are open structures. Structure; the left and right displacement mechanism includes an electric push rod A and a push plate, one side of the box body has an axial hole, and the rear end of the electric push rod A is installed outside the axial hole of the box body; one side of the push plate and the front end of the electric push rod A are installed together, and the lower end of the box body has a guide groove; the elevation adjustment mechanism includes an electric push rod B and an adjustment plate, and the front side of the adjustment plate is rotatably installed in the front end of the box body; the lower end of the electric push rod B and the upper end of the lower base plate are hingedly installed together, and the upper end of the electric push rod B and the lower part of the adjustment plate are hingedly installed together; the two sets of electric linear slides are installed at the right end of the rear side of the automatic welding workbench, and the opening of the box body is close to the back.

[0007] Furthermore, the upper end of the electric push rod B is located in the guide groove, and the width of the guide groove is greater than the outer diameter of the upper end of the electric push rod B.

[0008] Furthermore, the left-right width of the adjustment plate is smaller than the spacing between the two sides of the box body, and the front-to-back length of the adjustment plate is smaller than the inner front-to-rear end length of the box body.

[0009] Furthermore, the height and front-to-back length of the push plate are respectively smaller than the height and front-to-back length of the box body.

[0010] Furthermore, the front-to-back length of the adjustment plate is smaller than the front-to-back length of the plate.

[0011] The beneficial effects of the present invention are as follows: based on the mature technology of the automatic welding workbench application, and under the joint action of the PLC or host computer control system, after the staff puts the plate into the box, the push plates of the left and right displacement mechanisms can automatically push the internal plate to the left side of the box, and then move the push plates to a certain position to the right. The electric push rod B can make the adjustment plate stand upright at a large elevation angle. The six-axis workpiece clamping robot gripper of the automatic welding workbench can accurately clamp the middle position of the upper end of the plate workpiece to the welding fixed position in a relatively short time, preventing the uneven center of gravity of the plate parts after clamping, and the probability of the workpiece shaking left and right or even falling when the six-axis workpiece clamping robot transfers the plate, thereby ensuring the stable and reliable operation of the automatic welding workbench. Based on the above, the present invention has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural diagram of an automatic welding workbench.

[0014] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 3 It is a schematic diagram of the overall structure and local enlarged structure of the utility model.

[0016] Figure 4 It is a partial structural diagram of the utility model. DETAILED DESCRIPTION

[0017] Figure 1 、 2As shown in , 3, and 4, a locatable plate component conveying mechanism used in an automatic welding workbench includes an electric linear slide 1, a lower base plate 2, an electric push rod 3, and a box body 4. It also has a left and right displacement mechanism 5 and an elevation adjustment mechanism 6. The electric linear slide 1 has two sets, each set of the electric linear slide has two sliding blocks 101 that move in the same direction and are spaced a certain distance apart. The lower end of the lower base plate 2 is welded to the four sliding blocks 101 of the two sets of electric linear slides. There are four sets of electric push rods 3, and the lower ends of the cylinders of the four sets of electric push rods 3 are respectively screwed. The bolts are installed around the upper end of the lower base plate 2, and the lower end of the box body 5 is installed on the upper ends of the push columns of the four sets of electric push rods 3. The upper end and rear end of the box body 4 are open structures; the left and right displacement mechanism includes an electric push rod A51 and a push plate 52. There is a shaft hole (not shown in the figure) in the middle of the front and rear ends of the right side of the box body 52. There are two sets of electric push rods A51. The cylinders of the two sets of electric push rods A51 are respectively longitudinally installed on the outside of the two shaft holes on the right side of the box body 4 through bolts, and the right ends of the push columns of the two sets of electric push rods A51 are located in the shaft holes (the inner diameter of the shaft hole is larger than the outer diameter of the push column). The front and rear parts of the right side of the push plate 52 (located in the right end of the box) are respectively welded to the left ends of the push columns of the two sets of electric push rods A51, and a rectangular guide groove 51 is horizontally provided in the middle of the lower end of the box; the elevation adjustment mechanism includes an electric push rod B61 and an adjustment plate 62. The left and right parts of the front end of the adjustment plate 62 are respectively welded with a shaft rod 63. There is a shaft hole A42 on the left and right sides of the lower front end of the box 4. The shaft rods 63 on the left and right sides of the adjustment plate 62 are respectively rotatably sleeved in the two shaft holes A42 of the box. The upper part of the lower base plate 2 A hinge seat 7 is welded to the middle of the end, the rear position of the front lower middle part of the adjustment plate 62, and the lower end of the cylinder and the upper end of the electric push rod B61 respectively; the hinge seat at the lower end of the cylinder of the electric push rod B61 and the hinge seat 7 at the middle of the upper end of the lower base plate 2 are hinged together with a hinge rod, and the hinge seat at the upper end of the push column of the electric push rod B61 and the hinge seat 7 at the front lower middle part of the adjustment plate 62 are hinged together with a hinge rod; the two sets of electric linear slides 1 are distributed longitudinally front and back and are installed by bolts at the right end of the rear side of the automatic welding workbench 8, and the opening of the box 4 is at the rear.

[0018] Figure 1 、 2As shown in Figures 3 and 4, the upper end of the push post of the electric push rod B61 is located within the guide groove 41, and the left-right width of the guide groove 41 is greater than the outer diameter of the push post. The left-right width of the adjustment plate 62 is less than the distance between the left inner side of the housing 4 and the push plate 52 when the housing 4 is at its right dead center (the lower end of the push plate is higher than the height of the adjustment plate). The front-to-back length of the adjustment plate 52 is less than the inner front-to-back length of the housing 4. The height and front-to-back length of the push plate 62 are respectively less than the inner height and front-to-back length of the housing 4. The front-to-back length of the adjustment plate 62 is less than the front-to-back length of the plate 9. The PLC or host computer control system of the automatic welding workbench 8 has multiple power output terminals and the power input terminals of the electric linear slide 1, electric push rod 3, electric push rod A51, and electric push rod B61 connected via wires (the PLC or host computer control system of the automatic welding workbench 8 outputs power to the power input terminals of the electric linear slide 1, electric push rod 3, electric push rod A51, and electric push rod B61, respectively, and controls the working mode of the electric linear slide 1, electric push rod 3, electric push rod A51, electric push rod B61, etc., which is an extremely mature control technology available. This application does not provide any protection for the above technical solution, nor does it elaborate on the working principle).

[0019] Figure 1 、 2As shown in Figures 3 and 4, in this application, when the automatic welding workbench 8 is working, the staff puts the plate 9 into the box 4 (the rear side is an open structure) of the plate component conveying mechanism by forklift or manual means, and then the staff presses the momentary power switch. After the control system based on the PLC or the host computer receives the command signal, the control system will first output power for a certain time (for example, 5 seconds) to the positive and negative power input terminals of the two sets of electric push rods A51 under the action of the internal program. The push columns of the two sets of electric push rods A51 push the right end of the plate component to move to the left through the push plate 52, and the left end of the plate contacts the left end of the box; then, the control system outputs power for a certain time (for example, 1 second) to the negative and positive power input terminals of the two sets of electric push rods A51. The push columns of the two sets of electric push rods A51 drive the movement to the right, and the left end of the push plate 52 and the right end of the plate are separated (about 1 cm), which is convenient for the subsequent lifting of the plate. Then, the control system outputs power for a certain period of time (for example, 6 seconds) to the positive and negative power input terminals of the electric push rod B61. The push column of the electric push rod B61 drives the adjustment plate 62 in the box to move forward along the hinge point, thereby tilting the plate forward and backward to about 70 degrees, making it easier for the six-axis workpiece gripping robot to grip the plate. The control system controls the six-axis workpiece clamping robot to clamp the plate component to the welding fixed station 83 through its clamping claws, controls the six-axis workpiece clamping robot to clamp the corresponding component that needs to be welded on the plate in the material rack 82 to the corresponding welding station on the plate, and then controls the welding gun 84 to weld the corresponding component to the corresponding position on the plate; after welding is completed, the control system controls the six-axis workpiece clamping robot to clamp the plate after welding other components through its clamping claws and place it into the box 4, then, the control system outputs power for a certain time (for example, 6 seconds) to the negative and positive power input terminals of the electric push rod B61, and the push column of the electric push rod B61 drives the adjustment plate 62 in the box to move downward along the hinge point, and then drives the plate to move to a nearly horizontal state, so that subsequent staff can take away the plate after the welded components. Finally, the control system outputs power for a certain period of time (for example, 4 seconds) to the negative and positive power input terminals of the two sets of electric push rods A51. The push columns of the two sets of electric push rods A51 drive the push plate 52 to move to the right, and the left end of the push plate 52 contacts the right end of the box, which is convenient for the staff to put in the next plate for welding. In this new model, the control system can also control the positive and negative or negative and positive power input terminals of the four sets of electric push rods 3 to receive power as needed (for example, the height of the box needs to move upward to facilitate the six-axis workpiece clamping robot to clamp the plate as much as possible, and after subsequent welding is completed, the height of the box needs to move downward to facilitate the staff to take away the plate with other components welded to it as much as possible). The push columns of the four sets of electric push rods 3 will drive the plate in the box to move up or down into place, which is convenient for the six-axis workpiece clamping robot to clamp the plate, or for the staff to take away the plate with other components welded to it.The control system can also control the positive and negative or negative and positive power input terminals of the two sets of electric linear slides 1 to receive power as needed (for example, the box needs to move forward as much as possible to facilitate the six-axis workpiece clamping robot's claws to clamp the plate, and after subsequent welding is completed, the box needs to move backward as much as possible to facilitate the staff to take away the plate welded to other components, etc.). The sliding blocks of the two sets of electric linear slides 1 will drive the plate in the box to move forward or backward to the position, making it convenient for the six-axis workpiece clamping robot's claws to clamp the plate, or for the staff to take away the plate welded to other components, etc.

[0020] Figure 1 、 2 As shown in Figures 3 and 4, after the staff puts the plate into the box, the push plates of the left and right displacement mechanisms can automatically push the internal plate to the left side of the box, and then move the push plates to a certain position to the right. The electric push rod B can adjust the plate to a vertical state with a large elevation angle. The six-axis workpiece clamping robot gripper of the automatic welding workbench can accurately clamp the plate workpiece to the middle position of the upper end to the welding fixed position in a relatively short time, preventing the plate parts from having different centers of gravity after clamping, and the workpiece from shaking left and right or even falling when the six-axis workpiece clamping robot transfers the plate, thus ensuring the stable and reliable operation of the automatic welding workbench. The electric push rod, electric push rod A, and electric push rod B are finished products of reciprocating electric telescopic rods; the electric linear slide is a finished product of an electric lead screw slide.

[0021] It should be understood that although this specification is described in terms of implementation methods, the implementation methods do not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A positionable plate component conveying mechanism used in an automatic welding workbench, comprising an electric linear slide, a lower base plate, an electric push rod, and a box, characterized in that: It also has a left and right displacement mechanism and an elevation adjustment mechanism. The electric linear slide has at least two sets, each set of electric linear slides has two sliding blocks that move in the same direction and are spaced apart. The lower end of the lower base plate is respectively installed on the four sliding blocks of the two sets of electric linear slides. There are multiple sets of electric push rods, and the lower ends of the multiple sets of electric push rods are respectively installed around the upper end of the lower base plate. The lower end of the box is installed on the upper ends of the multiple sets of electric push rods. The upper end and the rear end of the box are open structures; the left and right displacement mechanism includes an electric push rod A, a push plate, and one end of the box. There is an axial hole on the side, and the rear end of the electric push rod A is installed outside the axial hole of the box; one side of the push plate and the front end of the electric push rod A are installed together, and the lower end of the box has a guide groove; the elevation adjustment mechanism includes an electric push rod B and an adjustment plate, and the front side of the adjustment plate is rotatably installed in the front end of the box; the lower end of the electric push rod B and the upper end of the lower base plate are hinged together, and the upper end of the electric push rod B and the lower part of the adjustment plate are hinged together; the two sets of electric linear slides are installed at the right end of the rear side of the automatic welding workbench, and the opening of the box is close to the back.

2. The positionable plate component conveying mechanism used in an automatic welding workbench according to claim 1, characterized in that: The upper end of the electric push rod B is located in the guide groove, and the width of the guide groove is greater than the outer diameter of the upper end of the electric push rod B.

3. The positionable plate component conveying mechanism used in an automatic welding workbench according to claim 1, characterized in that: The left and right widths of the adjustment plate are smaller than the spacing between the two sides of the box body, and the front and rear lengths of the adjustment plate are smaller than the inner front and rear end lengths of the box body.

4. The positionable plate component conveying mechanism used in an automatic welding workbench according to claim 1, characterized in that: The height and front-to-back length of the push plate are respectively smaller than the height and front-to-back length of the box body.

5. The positionable plate component conveying mechanism used in an automatic welding workbench according to claim 1, characterized in that: The front-to-back length of the adjusting plate is smaller than the front-to-back length of the plate.

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