Welding positioning device

Abstract

The present invention relates to a positioning device and discloses a welding positioning device, comprising a first clamping positioning device, a second clamping positioning device, a third clamping positioning device and a limiting device, wherein the first clamping positioning device and the second clamping positioning device are arranged relative to each other along a first direction, the first clamping positioning device comprises a first positioning member capable of fitting and positioning with the outer contour of a shaft sleeve at one end of a scissor arm workpiece, the second clamping positioning device comprises a second positioning member capable of fitting and positioning with the outer contour of a shaft sleeve at the other end of the scissor arm workpiece, so as to be able to position the scissor arm workpiece along the first direction, the third clamping positioning device and the limiting device are arranged relative to each other along a second direction, so as to be able to position the scissor arm workpiece along the second direction, the first direction being perpendicular to the second direction. The welding positioning device of the present invention enables a welding robot to obtain a better welding posture and has a higher welding accessibility rate.

Description

Technical Field

[0001] The present invention relates to a positioning device, in particular to a welding positioning device. Background Art

[0002] In the field of aerial work machinery, during the welding process of scissor arm workpieces, the welding accessibility and welding posture are key points to ensure the quality of weld formation, and are also a major difficulty in the industry. Traditional scissor arm workpiece positioning uses shaft sleeve inner hole positioning, and the welding accessibility and welding posture are poor, resulting in poor weld formation.

[0003] Specifically, the existing welding positioning tooling uses 6 positioning pins to clamp and position the scissor arm workpiece. Due to the presence of welds around the shaft sleeve, the welding accessibility is affected by the positioning axis and the robot's welding space is limited; this results in poor welding accessibility and welding posture.

[0004] Therefore, it is necessary to design a novel welding positioning device to overcome or alleviate the above technical problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a welding positioning device, which can enable a welding robot to obtain a better welding posture and has a higher welding accessibility rate.

[0006] In order to solve the above technical problems, the present invention provides a welding positioning device, including a first clamping positioning device, a second clamping positioning device, a third clamping positioning device and a limiting device. The first clamping positioning device and the second clamping positioning device are arranged relative to each other along a first direction. The first clamping positioning device includes a first positioning member that can fit and position with the outer contour of the shaft sleeve at one end of the scissors arm workpiece. The second clamping positioning device includes a second positioning member that can fit and position with the outer contour of the shaft sleeve at the other end of the scissors arm workpiece, so as to be able to position the scissors arm workpiece along the first direction. The third clamping positioning device and the limiting device are arranged relative to each other along the second direction, so as to be able to position the scissors arm workpiece along the second direction. The first direction is perpendicular to the second direction.

[0007] In some embodiments, the first clamping and positioning device includes a first base and a first driving device for driving the first positioning member to move, and the first driving device is installed on the first base.

[0008] In some embodiments, a top of the first base extends outward to form a first workpiece positioning base block.

[0009] In some embodiments, the second clamping and positioning device includes a second base and a second driving device for driving the second positioning member to move, and the second driving device is installed on the second base.

[0010] In some embodiments, the second clamping and positioning device also includes a self-locking device, and the second positioning member is arranged on the driving end of the second driving device through a connecting sleeve, and positioning holes for positioning and locking are provided on the connecting sleeve and the driving end of the second driving device. The self-locking device is arranged so that its locking end can be inserted into the positioning holes on the connecting sleeve and the driving end of the second driving device to lock the second positioning member.

[0011] In some embodiments, a second workpiece positioning block is formed on the top of the second base extending outward.

[0012] In some embodiments, the third clamping and positioning device includes a third base and a clamping device mounted on the third base.

[0013] In some embodiments, the clamping device is a pneumatic cylinder.

[0014] In some embodiments, the first positioning member and the second positioning member are both arc-shaped pressure plates that can fit the outer contour of the sleeve of the scissor arm workpiece.

[0015] In some embodiments, a tool frame is further included, and the first clamping and positioning device, the second clamping and positioning device, the third clamping and positioning device and the limiting device are all installed on the tool frame.

[0016] Through the above technical solution, the beneficial effects of the present invention are as follows:

[0017] In two mutually perpendicular directions, a first clamping positioning device and a second clamping positioning device are arranged relatively to each other, as well as a third clamping positioning device and a limit device are arranged relatively to each other to position the four corners of the scissor arm workpiece, which can avoid the weld at the position of the sleeve, improve the robot welding accessibility, and optimize the welding posture of the welding robot.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 1 is a schematic structural diagram of a welding positioning device in a specific embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the first clamping and positioning device in use in a specific embodiment of the present invention;

[0022] Figure 3 is a structural schematic diagram of a first clamping and positioning device in a specific embodiment of the present invention;

[0023] Figure 4 2 is a schematic diagram of the second clamping and positioning device in use in a specific embodiment of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the second clamping and positioning device in a specific embodiment of the present invention.

[0025] Description of Reference Numerals

[0026] 1 first clamping and positioning device 11 first positioning member

[0027] 12 first base 13 first driving device

[0028] 14 first workpiece positioning base block 2 second clamping positioning device

[0029] 21 second positioning member 22 second base

[0030] 23 Second drive device 24 Self-locking device

[0031] 25 connecting sleeve 26 second workpiece positioning base block

[0032] 3 Third clamping and positioning device 4 Limiting device

[0033] 5 tooling frame DETAILED DESCRIPTION

[0034] The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are intended to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but rather includes all technical solutions within the scope of the claims.

[0035] The present invention provides these embodiments to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as merely exemplary, and not as limiting.

[0036] It should be noted that, in the description of the present invention, unless otherwise specified, "plurality" means greater than or equal to two. Terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are intended solely to facilitate and simplify the description of the present invention and do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0037] In addition, the terms "first," "second," and similar terms used in this disclosure do not denote any order, quantity, or importance, but are simply used to distinguish different parts. The terms "include," "comprise," and similar terms mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of other elements also being included.

[0038] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections; they can be directly connected or indirectly connected through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intervening device between the specific device and the first or second device.

[0039] All terms used herein have the same meanings as understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined herein.

[0040] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0041] like Figures 1 to 5As shown, the present invention provides a welding positioning device, including a first clamping positioning device 1, a second clamping positioning device 2, a third clamping positioning device 3 and a limiting device 4, the first clamping positioning device 1 and the second clamping positioning device 2 are arranged relatively along a first direction, the first clamping positioning device 1 includes a first positioning member 11, the first positioning member 11 can be fitted and positioned with the outer contour of the shaft sleeve at one end of the scissors arm workpiece, the second clamping positioning device 2 includes a second positioning member 21, the second positioning member 21 can be fitted and positioned with the outer contour of the shaft sleeve at the other end of the scissors arm workpiece, so that the two can position the scissors arm workpiece along the first direction, the third clamping positioning device 3 and the limiting device 4 are arranged relatively along the second direction, so that the two can position the scissors arm workpiece along the second direction, and the first direction is perpendicular to the second direction.

[0042] In the above technical solution, the scissors of the scissors arm workpiece are arranged in parallel by two rectangular tubes, and sleeves are arranged at both ends of the two rectangular tubes to realize the hinge connection between different scissors. Since the end faces of the two ends of the rectangular tube are not blocked by plates, the first positioning member 11 of the present invention can directly extend into the end of the rectangular tube and fit the outer contour of the sleeve at one end of the scissors arm workpiece, and the second positioning member 21 can directly extend into the end of the rectangular tube and fit the outer contour of the sleeve at the other end of the scissors arm workpiece, thereby effectively avoiding the welding position of the sleeve and the rectangular tube on the side of the rectangular tube, making it convenient for the welding robot to adopt a better welding posture for welding and achieve a better robot welding accessibility rate. The welding accessibility rate refers to the ratio of the welding positions that the robot can perform during the welding process. Moreover, in another direction, the scissors of the scissors arm workpiece are positioned by a third clamping positioning device 3 and a limiting device 4 to prevent the scissors of the scissors arm workpiece from moving during the welding process and affecting the welding quality.

[0043] Among them, the first direction and the second direction are two relatively perpendicular directions. The first direction generally refers to the length direction of the rectangular tube of the scissors fork of the scissors arm workpiece, and the second direction generally refers to the width direction of the rectangular tube of the scissors fork of the scissors arm workpiece. It should be noted that the welding robot is an industrial robot engaged in welding (including cutting and spraying). The industrial robot is a multi-purpose, reprogrammable automatic control operating machine with three or more programmable axes, which is used in the field of industrial automation. The welding robot is an industrial robot with a welding clamp or welding (cutting) gun mounted on the end shaft flange to enable it to perform welding, cutting or thermal spraying. The welding robot belongs to a relatively conventional technology. On the basis of the technical solution of the present invention known to those skilled in the art, the model and specifications of the welding robot can be selected. Therefore, it will not be described in detail here.

[0044] In some specific embodiments, the first clamping and positioning device 1 includes a first base 12 and a first driving device 13. The first driving device 13 is mounted on the first base 12 and is used to drive the first positioning member 11 to move. The first driving device 13 can be a driving device such as a cylinder, a hydraulic cylinder, or a servo motor.

[0045] Furthermore, if Figure 3 As shown, the first positioning member 11 can be an arc-shaped pressure plate, the end of which is formed into an inwardly concave arc-shaped surface, which can fit the outer contour of the shaft sleeve of the scissor arm workpiece, thereby better fixing the scissors of the scissor arm workpiece.

[0046] In some specific embodiments, the second clamping and positioning device 2 includes a second base 22 and a second driving device 23. The second driving device 23 is mounted on the second base 22 and is used to drive the second positioning member 21 to move. The second driving device 23 can be a driving device such as a cylinder, a hydraulic cylinder, or a servo motor.

[0047] Furthermore, if Figure 5 As shown, the second positioning member 21 can be an arc-shaped pressure plate, the end of which is formed into an inwardly concave arc-shaped surface, which can fit the outer contour of the shaft sleeve of the scissors arm workpiece, thereby better fixing the scissors of the scissors arm workpiece.

[0048] In some specific embodiments, the top of the first base 12 extends outward to form a first workpiece positioning base block 14, and the top of the second base 22 extends outward to form a second workpiece positioning base block 26. During actual use, the extension directions of the first workpiece positioning base block 14 and the second workpiece positioning base block 26 are opposite to each other, and can support the ends of the scissors forks of the scissors arm workpiece.

[0049] In order to better fix the scissors fork of the scissors arm workpiece, a self-locking device 24 is also provided on the second clamping positioning device 2. The second positioning member 21 is sleeved on the driving end of the second drive device 23 through a connecting sleeve 25. Positioning holes are respectively provided on the connecting sleeve 25 and the driving end of the second drive device 23. The locking end of the self-locking device 24 can be inserted into the positioning holes on the connecting sleeve 25 and the driving end of the second drive device 23, thereby locking the second positioning member 21, that is, positioning and locking the scissors fork of the scissors arm workpiece in the length direction. Furthermore, multiple positioning holes can be provided on the driving end of the second drive device 23 to meet the needs of scissors forks of scissors arm workpieces of different specifications. Among them, the second drive device 23 is preferably a cylinder, and the self-locking device 24 is preferably a cylinder.

[0050] In some specific embodiments, the third clamping and positioning device 3 is similar in structure to the first clamping and positioning device 1. The third clamping and positioning device 3 includes a third base and a clamping device. The clamping device is installed on the third base. The clamping device can be a driving device such as a cylinder, a hydraulic cylinder, or a servo motor.

[0051] In some specific embodiments, the limiting device 4 is a fixed limiting block, and the limiting device 4 has a fitting surface that fits the scissor side of the scissor arm workpiece, and the fitting surface of the limiting device 4 is basically consistent with the scissor side profile of the scissor arm workpiece.

[0052] In some specific embodiments, the first clamping and positioning device 1, the second clamping and positioning device 2, the third clamping and positioning device 3, and the limit device 4 are all mounted on the tooling frame 5. Compared with the prior art, the tooling frame 5 does not require machined frame holes, and the overall tooling machining difficulty is reduced.

[0053] In order to better understand the technical concept of the present invention, a relatively comprehensive description is given below in combination with the technical features.

[0054] like Figures 1 to 5As shown, a preferred embodiment of the present invention provides a welding positioning device, including a first clamping positioning device 1, a second clamping positioning device 2, a third clamping positioning device 3, and a limiting device 4. The first clamping positioning device 1 and the second clamping positioning device 2 are arranged relative to each other along a first direction, and the third clamping positioning device 3 and the limiting device 4 are arranged relative to each other along a second direction, with the first direction and the second direction being perpendicular to each other. The first clamping positioning device 1 includes a first positioning member 11, a first base 12, and a first driving device 13. The first positioning member 11 can be an arc-shaped pressure plate. The first driving device 13 is mounted on the first base 12. The first driving device 13 is used to drive the first positioning member 11 to move. The first driving device 13 can be a cylinder. The second clamping and positioning device 2 includes a second positioning member 21, a second base 22, a second drive device 23, and a self-locking device 24. The second positioning member 21 can be an arc-shaped pressure plate. The second drive device 23 is mounted on the second base 22. The second drive device 23 is used to drive the second positioning member 21 to move. The second drive device 23 can be a cylinder. The second positioning member 21 is mounted on the driving end of the second drive device 23 through a connecting sleeve 25. The connecting sleeve 25 and the driving end of the second drive device 23 are respectively provided with positioning holes. The locking end of the self-locking device 24 can be inserted into the positioning holes on the connecting sleeve 25 and the driving end of the second drive device 23, thereby locking the second positioning member 21. Among them, the top of the first base 12 extends outward to form a first workpiece positioning base block 14, and the top of the second base 22 extends outward to form a second workpiece positioning base block 26. In actual use, the extension directions of the first workpiece positioning base block 14 and the second workpiece positioning base block 26 are opposite to each other, which can support the ends of the scissors fork of the scissors arm workpiece. The third clamping and positioning device 3 includes a third base and a clamping device, the clamping device is installed on the third base, the clamping device can be a cylinder, the limiting device 4 is a fixed limiting block, the first clamping and positioning device 1, the second clamping and positioning device 2, the third clamping and positioning device 3 and the limiting device 4 are all installed on the tooling frame 5.

[0055] Compared with the prior art method of using 6 positioning pins to position the shear arm workpiece shaft sleeve, the present invention positions the shear arm workpiece by clamping the four corners of the workpiece with a device with an arc pressure plate in the length direction and a clamping device in the width direction. The clamping and positioning device with an arc pressure plate can effectively fit the shaft sleeves at the four corners of the workpiece to achieve stable and reliable clamping and positioning, and avoid the welds at the position of the workpiece shaft sleeve that need to be welded by the welding robot, thereby improving the robot welding accessibility and reducing the subsequent manual repair welding workload. There are no interfering tooling components around the welds of the scissor arm workpiece, which optimizes the welding posture of the welding robot. It takes up little space and improves the utilization rate of the factory. The tooling frame 5 does not need to be machined with frame holes, which reduces the difficulty of overall tooling machining, simplifies the structure, and reduces the tooling production cost. The self-locking device 24 is provided to meet the limit clamping in the length direction and ensure that the workpiece does not interfere with the tooling when it is unloaded, thereby improving the efficiency of unloading.

[0056] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0057] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0058] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A welding positioning device, characterized in that: The invention comprises a first clamping positioning device (1), a second clamping positioning device (2), a third clamping positioning device (3) and a limiting device (4), wherein the first clamping positioning device (1) and the second clamping positioning device (2) are arranged relative to each other along a first direction, the first clamping positioning device (1) comprises a first positioning member (11) capable of being fitted and positioned with the outer contour of a shaft sleeve at one end of a scissor arm workpiece, the second clamping positioning device (2) comprises a second positioning member (21) capable of being fitted and positioned with the outer contour of a shaft sleeve at the other end of the scissor arm workpiece, so as to be able to position the scissor arm workpiece along the first direction, the third clamping positioning device (3) and the limiting device (4) are arranged relative to each other along a second direction, so as to be able to position the scissor arm workpiece along the second direction, the first The direction is perpendicular to the second direction, wherein the second clamping positioning device (2) includes a second base (22), a second driving device (23) for driving the second positioning member (21) to move, and a self-locking device (24), the second driving device (23) is installed on the second base (22), the second positioning member (21) is sleeved on the driving end of the second driving device (23) through a connecting sleeve (25), and the connecting sleeve (25) and the driving end of the second driving device (23) are provided with positioning holes for positioning and locking, and the self-locking device (24) is arranged so that its locking end can be inserted into the positioning holes on the connecting sleeve (25) and the driving end of the second driving device (23) to lock the second positioning member (21).

2. The welding positioning device according to claim 1, characterized in that: The first clamping and positioning device (1) comprises a first base (12) and a first driving device (13) for driving the first positioning member (11) to move, wherein the first driving device (13) is mounted on the first base (12).

3. The welding positioning device according to claim 2, characterized in that: The top of the first base (12) extends outward to form a first workpiece positioning base block (14).

4. The welding positioning device according to claim 1, characterized in that: The top of the second base (22) extends outward to form a second workpiece positioning base block (26).

5. The welding positioning device according to any one of claims 1 to 3, characterized in that: The third clamping and positioning device (3) comprises a third base and a clamping device mounted on the third base.

6. The welding positioning device according to claim 5, characterized in that: The clamping device is a cylinder.

7. The welding positioning device according to any one of claims 1 to 3, characterized in that: The first positioning member (11) and the second positioning member (21) are both arc-shaped pressure plates that can fit the outer contour of the shaft sleeve of the scissor arm workpiece.

8. The welding positioning device according to any one of claims 1 to 3, characterized in that: It also includes a tool frame (5), and the first clamping and positioning device (1), the second clamping and positioning device (2), the third clamping and positioning device (3) and the limiting device (4) are all mounted on the tool frame (5).

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