Positioning jig and laser welding device

Abstract

The utility model provides a positioning jig and a laser welding device, the positioning jig comprises a base, a clamping assembly, a pressing assembly and a feeding assembly, the clamping assembly is arranged on the base, and the clamping assembly clamps one end of a first workpiece and can drive the first workpiece to rotate; the pressing assembly is arranged on the base and can abut against the end, away from the clamping assembly, of the first workpiece. The feeding assembly comprises a connecting base, and the connecting base is rotationally connected relative to the base. The feeding assembly further comprises a feeding piece, and the feeding piece is movably connected to the connecting base and can feed the second workpiece till the second workpiece makes contact with the first workpiece. A rotating shaft of the connecting base is coaxial with a rotating shaft of the clamping assembly, and the connecting base can drive the feeding assembly to move in the circumferential direction of the first workpiece.

Description

Technical Field

[0001] The present application belongs to the technical field of positioning carriers, and more specifically, to a positioning fixture and a laser welding device. Background Art

[0002] As laser technology is widely used in welding processes, workpieces with different structures are gradually welded by laser, which also leads to an increasing demand for positioning fixtures for positioning workpieces to cooperate with laser welding.

[0003] The related technology discloses a positioning jig for assisting products in completing rotary welding manufacturing, wherein the product is made by welding two workpieces as an example, the positioning jig acts on the axial ends of the two workpieces respectively, and then the two workpieces are coaxially butt-jointed and a driving action is applied to make the two spliced ​​workpieces rotate coaxially and synchronously, thereby cooperating with laser welding of the circumferential joint seam between the two workpieces.

[0004] Since the positioning jig disclosed in the related art is only applicable to the basic rotary welding process, the basic rotary welding can be understood as requiring only coaxial docking between workpieces. If the workpiece is required to be welded at a certain angle on the product made by rotary welding, the positioning jig disclosed in the related art cannot assist in completing it, and a new positioning jig needs to be customized again, resulting in increased manufacturing costs. Utility Model Content

[0005] The present application provides a positioning fixture that can assist in welding workpieces that need to be limited to a certain angle on rotating products, thereby achieving multiple uses of one machine and reducing manufacturing costs.

[0006] The technical solution adopted in the present application is: to provide a positioning fixture, including a base, a clamping assembly, a pressing assembly and a loading assembly, wherein the clamping assembly is arranged on the base, the clamping assembly clamps one end of a first workpiece, and can drive the first workpiece to rotate; the pressing assembly is arranged on the base, and can abut against one end of the first workpiece away from the clamping assembly; the loading assembly includes a connecting seat, and the connecting seat is rotatably connected relative to the base; the loading assembly also includes a loading piece, the loading piece is movably connected to the connecting seat, and can load the second workpiece until it contacts the first workpiece; the rotating shaft of the connecting seat is coaxial with the rotating shaft of the clamping assembly, and the connecting seat can drive the loading assembly to move circumferentially around the first workpiece.

[0007] Furthermore, the connecting seat is provided with a first limiting portion, and the first limiting portion can limit the loading piece. When the loading piece moves to limit the first limiting portion, the second workpiece contacts the first workpiece.

[0008] Furthermore, the loading part includes a connecting part and a picking and placing part, one end of the connecting part is movably connected to the connecting seat, and the picking and placing part is arranged at the other end of the connecting part; the picking and placing part is provided with a slot, and the second workpiece can be plugged and unplugged into the slot.

[0009] Furthermore, the rotation angle of the connecting seat is set to 180°.

[0010] Furthermore, the clamping assembly includes a fixed seat, a chuck, a positioning pin and a plurality of jaws, the fixed seat is arranged on the base; the chuck is rotatably arranged on the fixed seat, the rotating shaft of the connecting seat is coaxial with the rotating shaft of the chuck, the plurality of jaws are arranged around the chuck with the rotating shaft of the chuck as the center, and the plurality of jaws can move synchronously with the rotating shaft of the chuck as the center to contract and clamp or expand and release the first workpiece; the positioning pin is convexly arranged on the chuck, and the positioning pin can be inserted and positioned with the first workpiece.

[0011] Furthermore, the positioning fixture also includes a first driving member, which is disposed on the fixing seat and is drivingly connected to the chuck, and drives the chuck to rotate.

[0012] Furthermore, the positioning fixture also includes a second driving member, which is arranged on the base, and the pressing component is movably connected to the base along the rotation axis direction of the clamping component. The second driving member is drivingly connected to the pressing component, and the second driving member drives the pressing component to move along the rotation axis direction of the clamping component.

[0013] Furthermore, the connecting seat can be rotatably disposed on the pressing component or the fixing seat or the base.

[0014] Further, a first direction and a second direction are defined, the first direction and the second direction are perpendicular to each other and parallel to the horizontal plane respectively, and the rotation axis direction of the clamping assembly is parallel to the first direction; the positioning fixture also includes a second driving member, the second driving member is arranged on the base, the pressing assembly includes a mounting seat, the mounting seat is movably connected to the base along the first direction, the second driving member is drivingly connected to the mounting seat, and the second driving member drives the mounting seat to move along the first direction; the pressing assembly also includes a pressing member, the pressing member is rotatably arranged on the mounting seat, the rotation axis of the pressing member is coaxial with the rotation axis of the chuck, the second driving member drives the mounting seat to move so that the pressing member is pressed against the end of the first workpiece away from the clamping assembly, and the pressing member can rotate synchronously with the rotation of the first workpiece; the connecting seat is rotatably arranged on the mounting seat, and the connecting seat The rotation angle is set to 180°; the loading part includes a connecting part and a pick-and-place part, one end of the connecting part can be rotatably connected to the connecting seat, the rotating axis of the connecting part is parallel to the second direction, and the pick-and-place part is arranged at the other end of the connecting part, and the pick-and-place part is provided with a slot, and the second workpiece can be plugged and unplugged with the slot; the connecting seat is provided with a first limiting part and a second limiting part, the first limiting part is arranged on the side of the connecting seat close to the chuck along the first direction, and the second limiting part is arranged on the side of the connecting seat away from the chuck along the first direction, and the first limiting part and the second limiting part can respectively limit the connecting part; when the connecting part is rotated to limit with the first limiting part, the second workpiece transported by the pick-and-place part contacts with the first workpiece; when the connecting part is rotated to limit with the second limiting part, the pick-and-place part is located on the side of the connecting seat away from the chuck.

[0015] The present application also provides a laser processing device, including a laser welding mechanism and a positioning fixture as described in any of the above embodiments, wherein a laser head of the laser welding mechanism is used to weld the seams between different workpieces positioned by the positioning fixture.

[0016] In the positioning jig of the present application, the base provides stable support for the structures of the clamping assembly, the pressing assembly and the feeding assembly; the clamping assembly clamps one end of the first workpiece and is rotatable relative to the base, and the pressing assembly can be pressed against the end of the first workpiece away from the clamping assembly, so that the pressing assembly cooperates with the clamping assembly to press the first workpiece to a relatively fixed state, and then the clamping assembly is rotated to rotate the first workpiece, wherein the first workpiece can be a single workpiece or a plurality of workpieces that are pressed together by the pressing cooperation of the pressing assembly and the clamping assembly. Therefore, the positioning jig of the present application can also be used for welding at circumferential joints of rotating workpieces.

[0017] Furthermore, by controlling the movement of the loading piece relative to the connecting seat, the second workpiece is moved to contact the first workpiece, and then the loading piece and the second workpiece are driven to rotate synchronously by rotating the connecting seat to adjust the circumferential angle between the second workpiece and the first workpiece. After the position and angle of the second workpiece are adjusted to the right position, the second workpiece can be welded to the first workpiece with the help of laser.

[0018] Therefore, the positioning fixture of the present application can be used for rotary welding of workpieces, and can also assist in welding workpieces that need to be limited to a certain angle on products made by rotary welding, achieving the multi-purpose effect of a positioning fixture and reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a positioning fixture provided in an embodiment of the present application;

[0021] Figure 2 This is a schematic block diagram of the structure of the laser welding device provided in an embodiment of the present application.

[0022] Among them, the reference numerals in the figure are:

[0023] 10. Laser welding device; 100. Positioning fixture; 110. Base; 120. Clamping assembly; 121. Fixing seat; 122. Chuck; 123. Positioning pin; 124. Clamping claw; 130. Pressing assembly; 131. Mounting seat; 132. Pressing member; 140. Loading assembly; 141. Connecting seat; 1411. First limiting portion; 1412. Second limiting portion; 142. Loading member; 1421. Connecting portion; 1422. Pick-and-place portion; 150. First driving member; 160. Second driving member; 200. Laser welding mechanism; 300. First workpiece; 400. Second workpiece. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] See also Figure 1 , the positioning fixture 100 provided in the embodiment of the present application is now described. The positioning fixture 100 provided in the embodiment of the present application includes a base 110, a clamping assembly 120, a pressing assembly 130 and a loading assembly 140. The clamping assembly 120 is arranged on the base 110, and the clamping assembly 120 clamps one end of the first workpiece 300 and can drive the first workpiece 300 to rotate; the pressing assembly 130 is arranged on the base 110, and can be pressed against the end of the first workpiece 300 away from the clamping assembly 120; the loading assembly 140 includes a connecting seat 141, and the connecting seat 141 is rotatably connected relative to the base 110; the loading assembly 140 also includes a loading piece 142, which is movably connected to the connecting seat 141 and can load the second workpiece 400 until it contacts the first workpiece 300; the rotating shaft of the connecting seat 141 is coaxial with the rotating shaft of the clamping assembly 120, and the connecting seat 141 can drive the loading assembly 140 to move circumferentially around the first workpiece 300.

[0029] In the positioning fixture 100 of the embodiment of the present application, the base 110 provides stable support for the structures of the clamping assembly 120, the pressing assembly 130 and the loading assembly 140; the clamping assembly 120 clamps one end of the first workpiece 300 and is rotatable relative to the base 110, and the pressing assembly 130 presses on the other end of the first workpiece 300 along the rotation axis direction of the clamping assembly 120, so that the pressing assembly 130 cooperates with the clamping assembly 120 to press the first workpiece 300 to a relatively fixed state, and then the clamping assembly 120 is rotated to control the first workpiece 300 to rotate synchronously, wherein the first workpiece 300 can be a workpiece, or it can be a plurality of workpieces that are pressed together by the pressing cooperation of the pressing assembly 130 and the clamping assembly 120. Therefore, the positioning fixture 100 of the present application can also be used in conjunction with laser for welding circumferential joints of rotating workpieces.

[0030] Furthermore, by controlling the movement of the loading piece 142 relative to the connecting seat 141, which movement includes but is not limited to rotation or movement, the second workpiece 400 is transported to contact the first workpiece 300. Of course, it can be understood as contact in the desired state rather than just satisfying the contact condition; then the loading piece 142 is driven to rotate synchronously by rotating the connecting seat 141, and the circumferential angle between the second workpiece 400 transported by the loading piece 142 and the first workpiece 300 clamped by the clamping assembly 120 is adjusted. After the position and angle of the second workpiece 400 transported by the loading piece 142 are adjusted to the right position, the second workpiece 400 transported by the loading piece 142 is welded to the first workpiece 300 pressed between the pressing assembly 130 and the clamping assembly 120 with the help of laser.

[0031] Therefore, the positioning fixture 100 of the embodiment of the present application can not only assist in the rotary welding of workpieces, but also assist in the welding of workpieces that need to be limited to a certain angle on rotary products, achieving the multi-purpose effect of the positioning fixture 100 and reducing the equipment cost and other related costs in actual production.

[0032] It should be noted that the clamping assembly 120, the pressing assembly 130 and the connecting seat 141 of the feeding assembly 140 can be directly connected to the base 110, or they can be indirectly connected using an intermediate piece; and the pressing assembly 130 can be moved closer to or farther away from the clamping assembly 120 along the axis of the clamping assembly 120. Specifically, the pressing assembly 130 can be movably connected to the base 110, or the clamping assembly 120 can be movably connected to the base 110, whichever meets the conditions. It should also be noted that the use of the term "rotating axis" in the embodiments of the present application can be understood as not a physical structure, but rather as indicating the central axis of rotation, and the term "rotating axis" in the following embodiments is understood in the same way.

[0033] The pressing assembly 130 in the above embodiment includes a mounting seat 131, which is arranged on the base 110; the pressing assembly 130 also includes a pressing piece 132, which is convexly arranged on the mounting seat 131 near the side of the clamping assembly 120 along the rotation axis direction of the clamping assembly 120, and the pressing piece 132 and the clamping assembly 120 are arranged opposite to each other along the rotation axis direction of the clamping assembly 120, and the pressing piece 132 can move closer to or away from the clamping assembly 120 along the rotation axis direction of the clamping assembly 120.

[0034] The pressing member 132 is controlled to move closer to the clamping assembly 120 along the rotation axis direction of the clamping assembly 120 to press the first workpiece 300. Conversely, the pressing member 132 is controlled to move away from the clamping assembly 120 along the rotation axis direction of the clamping assembly 120 to loosen or tighten the first workpiece 300. The pressing member 132 may be rotatable. As the first workpiece 300 is controlled to rotate by the clamping assembly 120, the pressing member 132 rotates synchronously under the action of the static friction force generated by the mutual pressing force of the first workpiece 300. Furthermore, the pressing member 132 and the first workpiece 300 have an acting end that is shaped like the corresponding acted end of the first workpiece 300 to improve the fit of the acting surface after pressing. This can not only disperse the force during the pressing process of the first workpiece 300 to avoid excessive concentration of pressing force and damage to the first workpiece 300, but also increase the static friction between the first workpiece 300 and the pressing member 132, thereby helping the first workpiece 300 to serve as a transmission member for the chuck 122 to drive the pressing member 132 to rotate.

[0035] Among them, the rotation angle of the connecting seat 141 in the embodiment of the present application is 180° as an example. According to the maximum angle between any two workpieces not exceeding 180°, therefore, relative to the first workpiece 300, controlling the loading member 142 to drive the second workpiece 400 to rotate relative to the angular range of 180° can satisfy any circumferential angle between the second workpiece 400 and the first workpiece 300.

[0036] Furthermore, the connecting seat 141 in the above embodiment may be provided with a first limiting portion 1411, and the first limiting portion 1411 may limit the loading piece 142. When the loading piece 142 moves or rotates to limit the first limiting portion 1411, the second workpiece 400 transported by the loading piece 142 is located between the pressing piece 132 and the clamping assembly 120, and is in contact with the first workpiece 300 and can be welded.

[0037] For example, the first limiting portion 1411 can limit the movement of the loading piece 142 relative to the connecting seat 141 in a blocking manner. After determining the position of the second workpiece 400 relative to the first workpiece 300 along the rotation axis direction of the clamping assembly 120 according to welding needs, a loading piece 142 of appropriate size is set accordingly and the second workpiece 400 is moved to the required position relative to the first workpiece 300 for contact. At this time, the loading piece 142 and the first limiting portion 1411 are in a limiting matching state. The first limiting portion 1411 set in this way can facilitate the subsequent batch production of the same product to achieve stable and accurate limiting. Of course, the first limiting portion 1411 can be a movable and adjustable setting so that it can be flexibly applied according to different needs, and there is no restriction on the specific structural shape of the first limiting portion 1411, as long as it meets the above-mentioned limiting function.

[0038] The loading piece 142 of the above embodiment may include a connecting portion 1421 and a picking and placing portion 1422, one end of the connecting portion 1421 may be movably or rotatably connected to the connecting seat 141, and the picking and placing portion 1422 is arranged at the other end of the connecting portion 1421; the picking and placing portion 1422 is provided with a slot (not shown in the figure), and the second workpiece 400 picked up and placed by the picking and placing portion 1422 can be plugged and unplugged in the slot (not shown in the figure).

[0039] The connecting portion 1421 can be understood as an intermediate piece between the pick-and-place portion 1422 and the connecting seat 141, which plays a role in structural connection, and the pick-and-place portion 1422 can be any setting with a pick-and-place function for the work, such as clamping pick-and-place, card-connected pick-and-place, and adsorption pick-and-place, etc. In the embodiment of the present application, a slot (not shown in the figure) is provided on the pick-and-place portion 1422 as an example, and the slot (not shown in the figure) is used to plug and unplug with the second workpiece 400 to realize the pick-and-place of the second workpiece 400, which is simple and convenient, easy to operate quickly, and conducive to improving production efficiency. The connecting portion 1421 and the pick-and-place portion 1422 can be an integral structure, or a detachable connection. The embodiment of the present application takes a detachable connection as an example to facilitate the replacement of the pick-and-place portion 1422. Of course, the connection part 1421 and the connection seat 141 are also detachably connected as an example, so that the discharge position of the picking and placing part 1422 can be adjusted by replacing the connection part 1421 of different sizes. The connection part 1421 can also be set as a size-adjustable structure, which can also realize the adjustment of the discharge position of the picking and placing part 1422, thereby improving the versatility of the positioning fixture 100.

[0040] Further, the clamping assembly 120 of the above embodiment may include a fixed seat 121, which is arranged on the base 110; the clamping assembly 120 may also include a chuck 122, a positioning pin 123 and a plurality of jaws 124, the chuck 122 can be rotatably arranged on the side of the fixed seat 121 close to the pressing member 132, and the rotating axis of the connecting seat 141 is coaxial with the rotating axis of the chuck 122; the positioning pin 123 is parallel to the rotating axis direction of the chuck 122 and protrudes from the chuck 122 close to the pressing member 132 to circumferentially position the first workpiece 300 clamped by the clamping assembly 120; the plurality of jaws 124 are arranged around the rotating axis of the chuck 122 on the side close to the pressing member 132 with the rotating axis of the chuck 122 as the center, and the plurality of jaws 124 can move synchronously with the rotating axis of the chuck 122 as the center to contract the clamping or expand and release.

[0041] In the clamping assembly 120 of the embodiment of the present application, the number of the clamping jaws 124 is three for example, and the chuck 122 and the three clamping jaws 124 cooperate to form a conventional three-jaw chuck structure. The clamping jaws 124 synchronously move toward the rotating shaft of the chuck 122 to clamp the first workpiece 300, and the clamping jaws 124 synchronously move away from the rotating shaft of the chuck 122 to release the first workpiece 300. Among them, the fixed seat 121 is fixedly set on the base 110 for example, so that the clamping assembly 120 is used as the positioning reference of the positioning fixture 100 to accurately position the first workpiece 300. The positioning pin 123 is used to position the first workpiece 300 on which the clamping jaw 124 acts, specifically to position the circumference of the first workpiece 300 and limit the rotation of the first workpiece 300. The number of the positioning pins 123 can be one or more. The embodiment of the present application takes two positioning pins 123 arranged at intervals as an example to improve the positioning accuracy. Of course, correspondingly, the first workpiece 300 is provided with positioning holes of corresponding number and size to cooperate with the positioning pins 123.

[0042] The positioning fixture 100 of the above embodiment may further include a first driving member 150 . The first driving member 150 is disposed on the fixing seat 121 . The first driving member 150 is drivingly connected to the chuck 122 . The first driving member 150 drives the chuck 122 to rotate.

[0043] The first driving member 150 can be a manual driving member or an automatic driving member. In the embodiment of the present application, the first driving member 150 is taken as an automatic controllable driving member, such as a precisely controllable driving member such as a servo motor. By controlling the first driving member 150 to precisely control the rotation of the chuck 122, the position of the positioning pin 123 provided on the chuck 122 can be controlled, thereby controlling the circumferential placement angle of the first workpiece 300 clamped by the clamp 124, and then cooperating with the rotation adjustment of the connecting seat 141, the effect of precisely adjusting the circumferential angle between the second workpiece 400 carried by the pick-and-place portion 1422 and the first workpiece 300 clamped by the clamp 124 can be achieved. Of course, an induction device can also be added to assist in the precise rotation positioning of the chuck 122. Similarly, for the control of movement or rotation in other embodiments of the present application, an induction device can also be set to assist in increasing the accuracy of the control positioning. The setting of the induction device belongs to the conventional technical means of those skilled in the art, and will not be repeated here.

[0044] Furthermore, the positioning fixture 100 of the above embodiment may also include a second driving member 160, which is disposed on the base 110, and the mounting seat 131 is movably disposed on the base 110 along the rotation axis direction of the clamping assembly 120. The second driving member 160 is drivingly connected to the mounting seat 131, and the second driving member 160 drives the mounting seat 131 to move along the rotation axis direction of the clamping assembly 120.

[0045] In the embodiment of the present application, the mounting seat 131 is movably arranged on the base 110 along the rotation axis direction of the clamping assembly 120 as an example, wherein the rotation axis direction of the clamping assembly 120 is the rotation axis direction of the chuck 122, and the second driving member 160 is controlled to drive the mounting seat 131 to move, so as to control the pressing member 132 to move closer to or away from the chuck 122 along the rotation axis direction of the chuck 122. Of course, in the embodiment of the present application, the pressing member 132 can also be movably arranged on the mounting seat 131 along the rotation axis direction of the chuck 122, and the mounting seat 131 is fixedly arranged on the base 110, and then the second driving member 160 is driven and connected to the pressing member 132. The second driving member 160 can be a manual driving member or an automatic driving member. In the embodiment of the present application, the second driving member 160 is an automatic and controllable driving member as an example, such as a precisely controllable driving member such as a servo motor or a cylinder driving assembly. Of course, a limit device may also be provided for the drive setting of the mounting seat 131 to limit the travel of the mounting seat 131 .

[0046] It is understandable that the connection seat 141 in the above embodiment can be rotatably arranged on the mounting seat 131 or the fixed seat 121 or the base 110. As long as the function of the loading assembly 140 to transport and adjust the angle of the second workpiece 400 to be transported relative to the first workpiece 300 clamped by the clamping jaws 124 is met, the specific embodiment of the present application takes the example that the connection seat 141 can be rotatably arranged on the mounting seat 131, so that the connection seat 141 and the pressing member 132 are relatively fixed along the rotation axis direction of the chuck 122, that is, when the second driving member 160 drives the mounting seat 131 to move along the rotation axis direction of the chuck 122, the pressing member 132 and the connection seat 141 move synchronously with the mounting seat 131.

[0047] Specifically, in one embodiment, a first direction and a second direction are defined, the first direction and the second direction are perpendicular to each other and parallel to the horizontal plane, respectively, wherein the first direction is denoted as X, and the second direction is denoted as Y. The rotation axis of the connecting seat 141 and the rotation axis of the chuck 122 are parallel to the first direction, the pressing member 132 is rotatably disposed on the mounting seat 131, and the rotation axis of the pressing member 132 is also parallel to the first direction. It can be understood that after the pressing member 132 and the chuck 122 cooperate to press the first workpiece 300 along the first direction, the chuck 122 is driven to rotate by controlling the first driving member 150, and the pressing member 132 can be synchronously rotated through the transmission of the pressed first workpiece 300.

[0048] One end of the connection portion 1421 of the loading member 142 is rotatably connected to the connection seat 141 , and the rotation axis direction of the connection portion 1421 is parallel to the second direction, that is, the rotation of the connection portion 1421 can be understood as swinging in a vertical plane. The connecting seat 141 may also be provided with a second limiting portion 1412, the first limiting portion 1411 is arranged on the side of the connecting seat 141 close to the chuck 122 along the first direction, and the second limiting portion 1412 is arranged on the side of the connecting seat 141 away from the chuck 122 along the first direction, and the first limiting portion 1411 and the second limiting portion 1412 can respectively limit the connecting portion 1421; when the connecting portion 1421 rotates to limit the first limiting portion 1411, the second workpiece 400 transported by the picking and placing portion 1422 is located between the pressing piece 132 and the chuck 122 and contacts the first workpiece 300; when the connecting portion 1421 rotates to limit the second limiting portion 1412, the picking and placing portion 1422 is located on the side of the connecting seat 141 away from the chuck 122.

[0049] The loading piece 142 of this embodiment rotates relative to the connecting seat 141 to transport the second workpiece 400 from the loading station to the unloading station. It can be understood that the unloading station corresponds to the position when the second workpiece 400 contacts the first workpiece 300, and the loading station is a position along the first direction corresponding to the distance from the unloading station. When the loading piece 142 is at the loading station, the second workpiece 400 is inserted into the slot (not shown in the figure) of the picking and placing portion 1422. The loading station is away from the unloading station, that is, away from the action area of ​​the pressing piece 132 and the chuck 122. This makes loading convenient and avoids affecting the welding process. In this embodiment, the rotation angle of the connecting part 1421 is 180° as an example, that is, the angle between the connecting part 1421 and the first limiting part 1411 when limiting is 180° relative to the angle between the connecting part 1421 and the second limiting part 1412 when limiting. In this way, when the connecting part 1421 and the second limiting part 1412 are limiting, it can be understood that the placing and picking part 1422 is farthest from the material placing station and has enough space for loading. Specifically, when the connecting portion 1421 and the first limiting portion 1411 are in limiting action, the picking and placing portion 1422 can release the material. At this time, the opening of the slot (not shown in the figure) of the picking and placing portion 1422 is along the radial direction of the chuck 122 and toward the rotating axis close to the chuck 122, which can be understood as facing the inner side of the positioning fixture 100, which is convenient for releasing the material; and when the picking and placing portion 1422 rotates 180° to limit the second limiting portion 1412, at this time, the opening of the slot (not shown in the figure) of the picking and placing portion 1422 is along the radial direction of the chuck 122 and toward the rotating axis away from the chuck 122, which can be understood as facing the outer side of the positioning fixture 100, which is more convenient for loading the material.

[0050] See also Figure 1 and Figure 2 The embodiment of the present application further provides a laser welding device 10, comprising a laser welding mechanism 200 and a positioning fixture 100 in any of the above embodiments, wherein the laser head of the laser welding mechanism 200 welds the seams between different workpieces positioned by the positioning fixture 100. The laser head of the laser welding mechanism 200 and the positioning fixture 100 can be relatively movable or rotating to achieve processing positioning. The specific positioning setting scheme can refer to the relevant public schemes in the art, and any scheme that meets the positioning requirements can be used, and no further description is given.

[0051] Since the laser welding device 10 of the embodiment of the present application includes the positioning fixture 100 in any of the above embodiments, it has the beneficial effects brought by the positioning fixture 100 in any of the above embodiments, which will not be described in detail here.

[0052] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A positioning fixture, characterized in that: include: Pedestal; A clamping assembly, disposed on the base, the clamping assembly clamps one end of a first workpiece and can drive the first workpiece to rotate; A pressing assembly, the pressing assembly is disposed on the base and can be pressed against an end of the first workpiece away from the clamping assembly; as well as A loading assembly, the loading assembly comprising a connecting seat, the connecting seat being rotatably connected relative to the base; the loading assembly further comprising a loading piece, the loading piece being movably connected to the connecting seat and capable of loading the second workpiece until it contacts the first workpiece; The rotating shaft of the connecting seat is coaxial with the rotating shaft of the clamping assembly, and the connecting seat can drive the loading assembly to move circumferentially around the first workpiece.

2. The positioning fixture according to claim 1, characterized in that: The connecting seat is provided with a first limiting portion, and the first limiting portion can limit the loading piece. When the loading piece moves to limit the first limiting portion, the second workpiece contacts the first workpiece.

3. The positioning fixture according to claim 1, characterized in that: The loading piece includes a connecting portion and a placing portion, one end of the connecting portion is movably connected to the connecting seat, and the placing portion is arranged at the other end of the connecting portion; The pick-and-place portion is provided with a slot, and the second workpiece is pluggable and fit in the slot.

4. The positioning fixture according to claim 1, characterized in that: The rotation angle of the connecting seat is set to 180°.

5. The positioning fixture according to any one of claims 1 to 4, characterized in that: The clamping assembly comprises a fixing seat, a chuck, a positioning pin and a plurality of clamping claws, wherein the fixing seat is arranged on the base; The chuck is rotatably arranged on the fixed seat, the rotating shaft of the connecting seat is coaxial with the rotating shaft of the chuck, a plurality of the clamping jaws are arranged around the chuck with the rotating shaft of the chuck as the center, and the plurality of the clamping jaws can be synchronously moved with the rotating shaft of the chuck as the center to contract and clamp or expand and release the first workpiece; The positioning pin is protruding from the chuck, and the positioning pin can be inserted and positioned to cooperate with the first workpiece.

6. The positioning fixture according to claim 5, characterized in that: The positioning fixture further includes a first driving member, which is disposed on the fixing seat and is drivingly connected to the chuck, and drives the chuck to rotate.

7. The positioning fixture according to any one of claims 1 to 4, characterized in that: The positioning fixture also includes a second driving member, which is arranged on the base. The pressing component is movably connected to the base along the rotation axis direction of the clamping component. The second driving member is drivingly connected to the pressing component, and the second driving member drives the pressing component to move along the rotation axis direction of the clamping component.

8. The positioning fixture according to claim 5, characterized in that: The connecting seat can be rotatably arranged on the pressing component or the fixing seat or the base.

9. The positioning fixture according to claim 6, characterized in that: A first direction and a second direction are defined, wherein the first direction and the second direction are perpendicular to each other and parallel to a horizontal plane respectively, and the rotation axis direction of the clamping assembly is parallel to the first direction; The positioning fixture further includes a second driving member, which is disposed on the base. The pressing assembly includes a mounting seat, which is movably connected to the base along the first direction. The second driving member is drivingly connected to the mounting seat, and the second driving member drives the mounting seat to move along the first direction. The pressing assembly further comprises a pressing member, which is rotatably disposed on the mounting seat, the rotating shaft of the pressing member being coaxial with the rotating shaft of the chuck, the second driving member driving the mounting seat to move so that the pressing member can abut against an end of the first workpiece away from the clamping assembly, and the pressing member can rotate synchronously with the rotation of the first workpiece; The connecting seat can be rotatably arranged on the mounting seat, and the rotation angle of the connecting seat is set to 180°; The loading part comprises a connecting part and a picking and placing part, one end of the connecting part is rotatably connected to the connecting seat, the rotating shaft of the connecting part is parallel to the second direction, the picking and placing part is arranged at the other end of the connecting part, the picking and placing part is provided with a slot, and the second workpiece can be plugged and unplugged into the slot; The connecting seat is provided with a first limiting portion and a second limiting portion, wherein the first limiting portion is arranged on the connecting seat near the chuck along the first direction, and the second limiting portion is arranged on the connecting seat away from the chuck along the first direction, and the first limiting portion and the second limiting portion can respectively act on the connecting portion in a limiting manner; When the connecting portion rotates to limit the first limiting portion, the second workpiece carried by the picking and placing portion contacts the first workpiece; When the connecting portion rotates to limit the second limiting portion, the taking and placing portion is located at the side of the connecting seat away from the chuck.

10. A laser welding device, characterized in that: The laser welding device comprises a laser welding mechanism and a positioning fixture as described in any one of claims 1 to 9, wherein a laser head of the laser welding mechanism is used for welding the seams between different workpieces positioned by the positioning fixture.

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