A positioning device

Abstract

The presently disclosed embodiment discloses a positioning device for positioning a first workpiece and a second workpiece to be welded, the positioning device comprising: a first positioning mechanism, a second positioning mechanism, a mounting plate, a clamping device and at least two auxiliary fixing devices; the first positioning mechanism, the second positioning mechanism and the clamping device are respectively mounted on the mounting plate, wherein the clamping device is used to fix the first workpiece; the auxiliary fixing device is arranged on the first positioning mechanism for auxiliary fixing of the first workpiece, and is arranged on the second positioning mechanism for auxiliary fixing of the second workpiece; the above technical scheme can ensure that the positions of the welding points of the first workpiece and the second workpiece are within a reasonable error range, thereby improving the qualified rate of the welding products, and, when positioning the workpieces, the workers only need to operate the first positioning mechanism and the second positioning mechanism without moving the tooling, thereby improving the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece welding, and in particular to a positioning device. Background Art

[0002] In the prior art, factories use a simple tooling to weld sheet metal parts, that is, the workpiece is first positioned manually, and then the workers carry the tooling to weld on the spot welding machine. On the one hand, due to the structure of the tooling, inaccurate positioning of the workpiece when placed will lead to inconsistent welding points. On the other hand, workers need to carry the tooling to weld, which is labor-intensive and seriously affects production efficiency. Moreover, after the tooling has been used for a period of time, the wear and size changes of the positioning device on the tooling also lead to a high rate of unqualified welding products. Summary of the invention

[0003] In order to solve the problems in the related art, an embodiment of the present disclosure provides a positioning device.

[0004] An embodiment of the present disclosure provides a positioning device.

[0005] Specifically, the positioning device is used to position the first workpiece and the second workpiece to be welded, and is characterized by comprising: a first positioning mechanism, a second positioning mechanism, a mounting plate, a clamping device, and at least two auxiliary fixing devices;

[0006] The first positioning mechanism, the second positioning mechanism, and the clamping device are respectively mounted on the mounting plate, wherein the clamping device is used to fix the first workpiece; the auxiliary fixing device is arranged on the first positioning mechanism to assist in fixing the first workpiece, and is arranged on the second positioning mechanism to assist in fixing the second workpiece;

[0007] The first positioning mechanism comprises: a first positioning plane and a second positioning plane, at least one first positioning pin respectively arranged on the first positioning plane and the second positioning plane, a height adjustment member arranged on the first positioning plane, and a limiting mechanism arranged between the first positioning plane and the second positioning plane, wherein:

[0008] The height of the first positioning plane is smaller than that of the second positioning plane, the first positioning pin, the first positioning plane and the second positioning plane are used to position the first workpiece, and the limiting mechanism is used to limit the horizontal displacement and rotational displacement of the first workpiece;

[0009] The second positioning mechanism comprises: a fixing seat fixed on the mounting plate, a displacement adjustment device installed on the fixing seat, a fixing block having a third positioning plane, and at least two second positioning pins arranged on the third positioning plane, wherein:

[0010] The second positioning pin and the third positioning plane are used to fix the second workpiece;

[0011] A through hole is provided on the fixing seat; the displacement adjustment device comprises: a guide shaft, a bearing and a quick clamp; the bearing is arranged in the through hole; the guide shaft can move in the bearing, one end of the guide shaft is connected to the fixing block, and the other end of the guide shaft is connected to the quick clamp.

[0012] Optionally, the limiting mechanism comprises: at least two limiting members and a limiting member fixing plate;

[0013] The limiting member is arranged at two ends of the limiting member fixing plate, and the limiting member fixing plate is arranged between the first positioning plane and the second positioning plane.

[0014] Optionally, the positioning device further comprises: a sensor;

[0015] The sensor is arranged on the first positioning plane, the second positioning plane and the third positioning plane.

[0016] Optionally, the auxiliary fixing devices are respectively arranged on the first positioning plane, the second positioning plane and the third positioning plane.

[0017] Optionally, there is a height difference between the auxiliary fixing devices arranged on the first positioning plane and the second positioning plane.

[0018] Optionally, the displacement adjustment device further comprises: a buffer member, which is arranged between the quick clamp and the fixing seat and is sleeved on the guide shaft.

[0019] Optionally, the positioning device further comprises: a receiving plate, and a quick-change connector mounted on the receiving plate;

[0020] The receiving plate is arranged on a side of the first positioning mechanism close to the second positioning plane; and the quick-change connector is used for connecting to an intelligent welding robot.

[0021] Optionally, the positioning device further comprises: a positioning base; the positioning base comprises: a platform fixing plate and at least two platform positioning pins;

[0022] The platform positioning pin is fixedly arranged on the platform fixing plate, and the platform positioning pin is used to connect the mounting plate and the platform fixing plate; the platform fixing plate is used to fix the connection platform.

[0023] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0024] According to the technical solution provided by the embodiment of the present disclosure, the first positioning mechanism is used to position the first workpiece and the second positioning mechanism is used to position the second workpiece at the same time. While the first workpiece and the second workpiece are positioned, the first workpiece is fixed by a clamping device, and the first workpiece and the second workpiece are assisted in being fixed by an auxiliary fixing device. The second workpiece can be moved to the position of the welding point of the first workpiece by a displacement adjustment device, so as to ensure that the positions of the welding points of the first workpiece and the second workpiece are within a reasonable error range, thereby improving the qualified rate of welding products. Moreover, when positioning the workpieces, workers only need to operate the first positioning mechanism and the second positioning mechanism without moving tooling, thereby improving production efficiency.

[0025] According to the technical solution provided in the embodiment of the present disclosure, the first workpiece is positioned by the first positioning plane, the second positioning plane and the positioning pins respectively arranged on the first positioning plane and the second positioning plane, and the second workpiece is positioned by the third positioning plane and the two positioning pins arranged on the third positioning plane. The positioning using the two-pin-one-plane method is stable, reliable and fast.

[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objectives and advantages of the present disclosure will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0028] Figure 1 A front view showing a positioning device according to an embodiment of the present disclosure;

[0029] Figure 2 A top view of a positioning device according to an embodiment of the present disclosure is shown;

[0030] Figure 3 A schematic diagram showing positioning of a first workpiece and a second workpiece using a positioning device according to an embodiment of the present disclosure;

[0031] Figure 4 A schematic structural diagram of a positioning base according to the present disclosure is shown. DETAILED DESCRIPTION

[0032] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. In addition, for the sake of clarity, parts not related to the description of the exemplary embodiments are omitted in the accompanying drawings.

[0033] In the present disclosure, it should be understood that terms such as "include" or "have" are intended to indicate the presence of features, numbers, steps, behaviors, components, parts, or a combination thereof disclosed in the present specification, and are not intended to exclude the possibility that one or more other features, numbers, steps, behaviors, components, parts, or a combination thereof exist or are added.

[0034] It should also be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] As mentioned above, in the prior art, factories use a simple tooling to weld sheet metal parts, that is, the workpiece is first positioned manually, and then the workers carry the tooling to the spot welding machine for welding. On the one hand, due to the structure of the tooling, inaccurate positioning of the workpiece when placed will lead to inconsistent welding point positions. On the other hand, workers need to carry the tooling for welding, which is labor-intensive and seriously affects production efficiency. Moreover, after the tooling has been used for a period of time, the wear and size changes of the positioning device on the tooling also lead to a high rate of unqualified welding products.

[0036] In view of the above-mentioned defects, an embodiment of the present disclosure provides a positioning device, which uses a first positioning mechanism to position a first workpiece and uses a second positioning mechanism to position a second workpiece at the same time. While achieving the positioning of the first workpiece and the second workpiece, the first workpiece is fixed by a clamping device, and the first workpiece and the second workpiece are assisted in being fixed by an auxiliary fixing device. The second workpiece can be moved to the position of the welding point of the first workpiece by a displacement adjustment device, so as to ensure that the positions of the welding points of the first workpiece and the second workpiece are within a reasonable error range, thereby improving the qualified rate of welding products. Moreover, when positioning the workpieces, workers only need to operate the first positioning mechanism and the second positioning mechanism without moving tooling, thereby improving production efficiency.

[0037] Figure 1 A front view showing a positioning device according to an embodiment of the present disclosure; Figure 2 A top view of a positioning device according to an embodiment of the present disclosure is shown; Figure 3 A schematic diagram showing positioning of a first workpiece and a second workpiece using a positioning device according to an embodiment of the present disclosure.

[0038] like Figure 1 , 2 , 3, the positioning device comprises: a first positioning mechanism 10, a second positioning mechanism 20, a mounting plate 30, a clamping device 40 and at least two auxiliary fixing devices 50; the positioning device is used to position the first workpiece and the second workpiece to be welded (see Figure 3 ).

[0039] The first positioning mechanism 10, the second positioning mechanism 20, and the clamping device 40 are respectively installed on the mounting plate 30, wherein the clamping device 40 is used to fix the first workpiece; the auxiliary fixing device 50 is arranged on the first positioning mechanism 10 to assist in fixing the first workpiece, and is arranged on the second positioning mechanism 20 to assist in fixing the second workpiece.

[0040] The first positioning mechanism 10 includes: a first positioning plane 11 and a second positioning plane 12, at least one first positioning pin 13 respectively arranged on the first positioning plane 11 and the second positioning plane 12, a height adjustment member 14 arranged on the first positioning plane 11, and a limiting mechanism 15 arranged between the first positioning plane 11 and the second positioning plane 12, wherein:

[0041] The height of the first positioning plane 11 is smaller than that of the second positioning plane 12 . The first positioning pin 13 , the first positioning plane 11 , and the second positioning plane 12 are used to position the first workpiece. The limiting mechanism 15 is used to limit the horizontal displacement and rotational displacement of the first workpiece.

[0042] The second positioning mechanism 20 includes: a fixing seat 21 fixed on the mounting plate 30, a displacement adjustment device 22 installed on the fixing seat 21, a fixing block 23 having a third positioning plane 231, and at least two second positioning pins 24 arranged on the third positioning plane 231, wherein: the second positioning pin 24 and the third positioning plane 231 are used to fix the second workpiece; and a through hole (not shown in the figure) is opened on the fixing seat 21.

[0043] Please refer to Figure 2 The displacement adjustment device 22 includes: a guide shaft 221, a bearing 222, a quick clamp 223 and a buffer 224; the bearing 222 is arranged in the through hole; the guide shaft 221 can move in the bearing 222, one end of the guide shaft 221 is connected to the fixed block 23, and the other end of the guide shaft 221 is connected to the quick clamp 223; the buffer 224 is arranged between the quick clamp 223 and the fixed seat 21, and is sleeved on the guide shaft 221.

[0044] According to an embodiment of the present disclosure, the first positioning plane 11 and the second positioning plane 12 may be top surfaces of mounting plates at different heights, and the mounting plates are respectively fixed to the first mounting plate 30 by screws and conical pins. It is understood that the first positioning plane 11 and the second positioning plane 12 may also be parts at different heights on the top surface of the first positioning mechanism 10, and the present disclosure does not limit this.

[0045] According to the embodiment of the present disclosure, the first positioning pins 13 are respectively arranged on the first positioning plane 11 and the second positioning plane 12. In the present disclosure, the number, size, model and setting position of the first positioning pins 13 are determined according to the first workpiece to be welded. Figure 3 When fixing the first workpiece, the first locating pin 13 penetrates into the hole on the first workpiece, and at the same time makes the first workpiece contact with the first positioning plane 11 and the second positioning plane 12 respectively. That is to say, the first locating pin 13 needs to be combined with the first positioning plane 11 and the second positioning plane 12 to realize the positioning of the first workpiece. Therefore, the number, size, and model of the first locating pins 13 on the first positioning plane 11 and the second positioning plane 12 can be flexibly set according to the holes on the first workpiece, and the height difference between the first positioning plane 11 and the second positioning plane 12 can be reasonably determined, so that the first workpiece contacts with the first positioning plane 11 and the second positioning plane 12, and the positioning of the first workpiece is realized together.

[0046] According to an embodiment of the present disclosure, the height of the first positioning plane 11 is smaller than that of the second positioning plane 12, and a height adjustment member 14 can be provided on the first positioning plane, so that the first workpiece can be adjusted to a suitable positioning height conveniently and quickly during the early adjustment of the first workpiece. Specifically, the height adjustment point 14 can be an adjustment screw, which is tightened with a nut after the positioning height of the first workpiece is adjusted, thereby ensuring that the next workpiece is positioned at the same positioning height.

[0047] According to an embodiment of the present disclosure, the limiting mechanism 15 includes: at least two limiting members 151 and a limiting member fixing plate 152; the limiting members 151 are arranged at both ends of the limiting member fixing plate 152, and the limiting member fixing plate 152 is arranged between the first positioning plane 11 and the second positioning plane 12.

[0048] Please refer to Figure 3 The limit member 151 can be a vertical rod that passes through the corresponding hole on the first workpiece, thereby limiting the horizontal displacement and rotational displacement of the first workpiece, thereby ensuring that the height adjustment member 14 only adjusts the positioning height of the first workpiece in a direction perpendicular to the first positioning plane 11, thereby achieving precise positioning of the first workpiece.

[0049] According to the embodiment of the present disclosure, auxiliary fixing devices 50 may be respectively provided on the first positioning plane 11 and the second positioning plane 12 for fixing the positioned first workpiece to ensure that the first workpiece will not have positioning deviation as much as possible during the welding process.

[0050] According to an embodiment of the present disclosure, there is a height difference between the auxiliary fixing devices 50 disposed on the first positioning plane 11 and the second positioning plane 12, so as to fit the surface of the first workpiece. It is understood that a suitable installation height of the auxiliary fixing device 50 can be set for different types of first workpieces, and the present disclosure does not limit this.

[0051] According to an embodiment of the present disclosure, the positioning device also includes: a sensor (not shown in the figure); the sensor is arranged on the first positioning plane 11 and the second positioning plane 12, and is used to detect whether the first workpiece is placed on the first positioning mechanism. Only when the first workpiece is placed and placed in place, the sensor will send a signal, and the entire system can carry out subsequent welding work, otherwise the system will alarm and issue a prompt.

[0052] According to an embodiment of the present disclosure, the clamping device 40 may be a quick clamp. After the first workpiece is positioned, the quick clamp is pulled to clamp the first workpiece.

[0053] According to an embodiment of the present disclosure, the fixing seat 21 can be fixed on the mounting plate 30 by screws and conical pins. Specifically, the fixing seat 21 is arranged on a side close to the first positioning plane 11, and the setting position of the fixing seat 21 can be flexibly determined according to the adjustable height range of the height adjustment point 14 and the height difference between the first positioning plane 11 and the second positioning plane 12, and the present disclosure does not limit this.

[0054] According to the embodiment of the present disclosure, similar to the first positioning pin 13, the number, size, model and setting position of the second positioning pin 24 are determined according to the second workpiece to be welded. Since the second workpiece is smaller in volume and simpler in structure than the first workpiece, positioning can be achieved through the third positioning plane 231 and the two second positioning pins 24.

[0055] According to the embodiment of the present disclosure, the bearing 222 can be an oil-free linear bearing, and the number of bearings 222 is 2, which are arranged in the two through holes of the fixed block 23, and the guide shaft 221 can slide forward and backward in the oil-free linear bearing; the guide shaft 221 and the fixed block 23 are fastened together, and the spring always pushes the guide shaft 221 and the fixed block 23 backward. Pulling the quick clamp 223 can push the fixed block 23 to the front, and lock the fixed block 23 together with the spring until the finished product after welding is removed.

[0056] According to the embodiment of the present disclosure, when the quick clamp 223 is pulled, the guide shaft 221 is driven to push the fixed block 23 to move forward and backward on the fixed seat 21, the second workpiece is placed against the fixed block 23, and the second positioning pin 25 is inserted into the positioning hole on the second workpiece to complete the positioning of the second workpiece. After that, the quick clamp 223 can be further pulled to move the second workpiece toward the direction of the first workpiece to achieve welding between the two. During the movement, the buffer 224 located between the quick clamp 223 and the fixed seat 21 plays a stabilizing and buffering role, so as to accurately move to the position of the welding point. Among them, the buffer 224 can be a spring or other elastic component.

[0057] According to the embodiment of the present disclosure, an auxiliary fixing device 50 can be provided on the third positioning plane 231 to fix the second workpiece after positioning, so as to ensure that the second workpiece will not produce positioning deviation as much as possible during the welding process. Specifically, the auxiliary fixing device 50 can be a powered on and off magnet type electromagnet. When the welding is completed and the workpiece needs to be removed, the electromagnet power is turned on and the magnet is turned off, and then the quick clamp 223 is pulled to separate the second workpiece from the second positioning pin 24, and then the first workpiece is separated from the first positioning pin 13, so as to remove the welded product.

[0058] According to an embodiment of the present disclosure, the sensor (not shown in the figure) is arranged on the third positioning plane 231, and is used to detect whether a second workpiece is placed on the tooling. Only when the second workpiece is placed and placed in place, the sensor will send a signal, and the entire system can carry out subsequent welding work. Otherwise, the system will alarm and issue a prompt.

[0059] According to an embodiment of the present disclosure, the positioning device further includes: a receiving plate 60, and a quick-change connector 70 installed on the receiving plate; the receiving plate 60 is arranged on the side of the first positioning mechanism 10 close to the second positioning plane 12; the quick-change connector 70 is used to connect the intelligent welding robot. The quick-change connector 70 is a quick-change female head, and correspondingly, a quick-change male head a is installed on one side of the intelligent welding robot. The quick-change male head a and the quick-change female head can be connected and disconnected very conveniently and quickly, and the quick-change female head and the quick-change male head are standard products with very high interchangeability, thereby realizing the docking of the positioning device and the intelligent welding robot and achieving the goal of efficient production.

[0060] Figure 4 A schematic structural diagram of a positioning base according to the present disclosure is shown.

[0061] like Figure 4As shown, the positioning device also includes: a positioning base 80; the positioning base 80 includes: a platform fixing plate 81 and at least two platform positioning pins 82; the platform positioning pins 82 are fixedly arranged on the platform fixing plate 81, and the platform positioning pins 82 are used to connect the mounting plate 30 and the platform fixing plate 81; the platform fixing plate 81 is used to fix the connection platform.

[0062] According to the embodiment of the present disclosure, in order to realize the automated welding of the intelligent welding robot, the positioning device is placed on the positioning base 80, and the positioning method of the two platform positioning pins 82 and the top surface of the platform fixing plate 81 is also adopted to ensure the consistency of the positioning device placement each time. Multiple positioning bases 80 can be installed on a workbench, and each positioning base 80 corresponds to a set of positioning devices. When the robot uses a set of positioning devices for welding, the worker can operate the remaining positioning devices, place the first workpiece to be welded and the second workpiece, and remove the finished product after welding.

[0063] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects

[0064] The positioning device disclosed in the present invention adopts a two-pin-one-face method to position the first workpiece and the second workpiece, and the positioning is stable, reliable and fast. Compared with the solution used in the previous factory:

[0065] 1) The installation and debugging time is greatly shortened. The original tooling debugging period took about 20 days, but now it takes about half a day to two days.

[0066] 2) After the original tooling has been used for a period of time, if the welded workpiece fails to meet the standards, the tooling will be scrapped or re-debugged for a long time, which is very costly. The current tooling can restore accuracy in a very short time.

[0067] 3) The original tooling was only suitable for manual operation, and workers had to carry the tooling for welding; now it can adapt to robot automated welding, which reduces the technical level requirements and labor intensity of workers, improves the working environment of workers, avoids the harm of welding to workers' bodies, and improves production efficiency. The original tooling can produce about 200 pieces per shift, and now it can produce about 900 pieces per shift, and the production efficiency has increased by 3-4 times.

[0068] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Developers in the field should understand that the scope of the invention involved in the present disclosure is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other.

Claims

1. A positioning device for positioning a first workpiece and a second workpiece to be welded, characterized in that: include: A first positioning mechanism, a second positioning mechanism, a mounting plate, a clamping device, and at least two auxiliary fixing devices; The first positioning mechanism, the second positioning mechanism, and the clamping device are respectively mounted on the mounting plate, wherein the clamping device is used to fix the first workpiece; the auxiliary fixing device is arranged on the first positioning mechanism to assist in fixing the first workpiece, and is arranged on the second positioning mechanism to assist in fixing the second workpiece; The first positioning mechanism comprises: a first positioning plane and a second positioning plane, at least one first positioning pin respectively arranged on the first positioning plane and the second positioning plane, a height adjustment member arranged on the first positioning plane, and a limiting mechanism arranged between the first positioning plane and the second positioning plane, wherein: The height of the first positioning plane is smaller than that of the second positioning plane, the first positioning pin, the first positioning plane and the second positioning plane are used to position the first workpiece, and the limiting mechanism is used to limit the horizontal displacement and rotational displacement of the first workpiece; The second positioning mechanism comprises: a fixing seat fixed on the mounting plate, a displacement adjustment device installed on the fixing seat, a fixing block having a third positioning plane, and at least two second positioning pins arranged on the third positioning plane, wherein: The second positioning pin and the third positioning plane are used to fix the second workpiece; The fixing seat is provided with a through hole; the displacement adjustment device comprises: a guide shaft, a bearing and a quick clamp; the bearing is arranged in the through hole; the guide shaft can move in the bearing, one end of the guide shaft is connected to the fixing block, and the other end of the guide shaft is connected to the quick clamp; The displacement adjustment device further includes: a buffer member, which is arranged between the quick clamp and the fixing seat and sleeved on the guide shaft; The positioning device also includes: A receiving plate and a quick-change connector mounted on the receiving plate; The receiving plate is arranged on a side of the first positioning mechanism close to the second positioning plane; and the quick-change connector is used for connecting to an intelligent welding robot.

2. The positioning device according to claim 1, characterized in that: The limiting mechanism comprises: at least two limiting members and a limiting member fixing plate; The limiting member is arranged at two ends of the limiting member fixing plate, and the limiting member fixing plate is arranged between the first positioning plane and the second positioning plane.

3. The positioning device according to claim 1, characterized in that: Also includes: sensor; The sensor is arranged on the first positioning plane, the second positioning plane and the third positioning plane.

4. The positioning device according to claim 1, characterized in that: The auxiliary fixing devices are respectively arranged on the first positioning plane, the second positioning plane and the third positioning plane.

5. The positioning device according to claim 4, characterized in that: There is a height difference between the auxiliary fixing devices arranged on the first positioning plane and the second positioning plane.

6. The positioning device according to claim 1, characterized in that: Also includes: Positioning base; The positioning base comprises: a platform fixing plate and at least two platform positioning pins; The platform positioning pin is fixedly arranged on the platform fixing plate, and the platform positioning pin is used to connect the mounting plate and the platform fixing plate; the platform fixing plate is used to fix the connection platform.

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