Flexible quick-change device for welding assembly line

Abstract

The utility model relates to a welding assembly line flexible quick change device, which comprises a fixed tool, a movable tool and a cache mechanism, the fixed tool is arranged on a rack, the fixed tool comprises a fixed substrate and a common clamp, the fixed substrate is arranged on the rack, and the rack is also provided with a bearing frame; the cache mechanism comprises a cache framework; the movable tool comprises a movable frame and a special clamp. The movable tool can be temporarily stored on the temporary storage frame when not used, the movable tool can be moved to the bearing frame from the temporary storage frame when used, and the common clamp and the special clamp are matched to position a workpiece. The device is simple in structure and convenient to operate, welding quality and welding efficiency are not affected due to the fact that clamps needed by workpieces of multiple vehicle types are densely arranged on a machine frame of a welding line, local switching of the clamps is achieved, accessibility of a welding gun is not affected, and the production requirements for high takt and high quality of the automobile welding line can be met.

Description

Technical Field

[0001] The utility model relates to a flexible quick-change device for a welding line, belonging to the technical field of automobile welding lines. Background Technique

[0002] In the field of automobile manufacturing, in order to meet the diverse needs of consumers, the automobile manufacturing industry has gradually developed towards a more flexible and high-tempo direction. With the increasing personalized demands in the automobile market, in order to better occupy the market and gain an advantage, it is necessary to change the previous large-batch and single-type production mode and quickly respond to the development direction of the flexible customization, multi-variety, and small-batch automobile industry.

[0003] Facing the production of many vehicle models, in order to save the layout space and production cost of the automobile welding production line, it is generally planned that multiple vehicle models share a set of welding equipment. When workpieces with different local structures in existing multiple vehicle models share a set of welding equipment, for the different parts, local fixtures are usually switched to position the local workpieces. That is, it is necessary to layout the fixtures of multiple vehicle models on the welding line. When welding the workpieces of the corresponding vehicle model, the corresponding fixture is selected for clamping and positioning. After replacing the workpieces with different local structures, the corresponding fixture needs to be moved away by flipping and the fixture of the corresponding workpiece needs to be flipped in place. This method requires pre-installing the positioning fixtures of the workpieces of the model to be processed on the welding line. Although local switching can be achieved, due to the overly dense space fixtures on the welding line, the accessibility of the welding guns on the welding line is poor, affecting the production tempo of the workpieces. Summary of the Invention

[0004] The utility model aims at the deficiencies of the existing technology and provides a flexible quick-change device for a welding line.

[0005] The technical solution for the utility model to solve the above technical problems is as follows: A flexible quick-change device for a welding line includes a fixed tooling, a movable tooling, and a buffer mechanism. The fixed tooling is arranged on a frame. The fixed tooling includes a fixed substrate and a common fixture arranged on the fixed substrate. The fixed substrate is arranged on the frame. A bearing frame for bearing the movable tooling is further arranged on the frame, and a positioning mechanism for positioning the movable tooling is arranged on the bearing frame;

[0006] The buffer mechanism includes a buffer frame; the movable tooling includes a movable frame and a special fixture arranged on the movable frame;

[0007] The movable tooling can be buffered on the buffer frame when not in use, and can be moved from the buffer frame to the bearing frame when in use. The common fixture and the special fixture cooperate to position the workpiece.

[0008] The beneficial effects of the present utility model are as follows: The movable toolings with fixtures for different vehicle models are respectively cached on the caching mechanism. When producing a certain vehicle model, the movable tooling with the fixture corresponding to the vehicle model is quickly installed on the bearing frame, meeting the requirements for the fixtures needed for the workpieces of that vehicle model, thereby satisfying the positioning requirements for the workpieces of the corresponding vehicle model. The structure of the present utility model is simple and the operation is convenient. It will not affect the welding quality and welding efficiency due to the fixtures required for too many vehicle model workpieces being concentrated on the frame of the welding line. This device not only realizes the partial switching of the fixtures, but also does not affect the accessibility of the welding torch, and can meet the high-beat and high-quality production requirements of the automobile welding line.

[0009] Based on the above technical solution, the present utility model can be further improved as follows.

[0010] Further, the positioning mechanism includes a bearing platform arranged on the bearing frame, and positioning members for the movable tooling are arranged on the bearing platform.

[0011] The beneficial effect of adopting the above further solution is that when the movable tooling corresponding to the vehicle model is transferred from the caching frame to the bearing frame, it can be directly transferred to the bearing platform, and the stable positioning of the movable tooling on the bearing platform is realized through the positioning members, so as to satisfy that the special fixture of the movable tooling can cooperate with the common fixture to realize the stable support for the workpieces of the corresponding vehicle model, so as to meet the welding requirements of the workpieces.

[0012] Further, the bearing platform is arranged on the bearing frame through a sliding mechanism, and the bearing platform has one or more in-place positions.

[0013] The beneficial effect of adopting the above further solution is that the bearing platform can be slidably arranged on the bearing frame through the sliding mechanism, and the bearing platform can slide under the action of the sliding mechanism, so as to adjust the position of the bearing platform on the bearing frame to meet the requirements of the in-place positions of the special fixtures on different movable toolings, thereby realizing the clamping and positioning of the workpieces of different vehicle models.

[0014] Further, the sliding mechanism includes a sliding driving cylinder. The bearing platform is arranged on the bearing frame through a slide rail. The cylinder body of the sliding driving cylinder is arranged on the bearing frame, and the piston rod of the sliding driving cylinder is connected to the bearing platform.

[0015] The beneficial effect of adopting the above further solution is that the sliding driving cylinder can be used to drive the bearing platform, so as to meet the requirements of the working positions of the movable toolings corresponding to different vehicle models.

[0016] Further, a limiting mechanism for limiting the in-place position of the bearing platform is correspondingly arranged on the bearing frame and / or the frame.

[0017] The beneficial effect of adopting the above further solution is that the carrying platform can move the movable tooling corresponding to the vehicle model to the position of its corresponding working position under the action of the sliding mechanism. In order to further ensure the accuracy of the movable tooling in place, a limiting mechanism can also be set at the in-place position. Different in-place positions can be correspondingly equipped with a limiting mechanism 1, a limiting mechanism 2, etc. The limiting mechanism can adopt a limiting block arranged on the frame or the carrying frame, and the installation position of the limiting mechanism should avoid interfering with the sliding of the carrying platform carrying the movable tooling.

[0018] Further, it further includes an in-place pressing mechanism for pressing the in-place movable tooling, and the in-place pressing mechanism is arranged on the frame and / or the carrying frame.

[0019] The beneficial effect of adopting the above further solution is that the movable tooling in place on the carrying frame is pressed, further ensuring the stability of the special fixture in the working position.

[0020] Further, the in-place pressing mechanism includes a pressing arm and an in-place pressing cylinder for driving the pressing arm. An in-place cylinder swing arm is arranged on the in-place pressing cylinder, the pressing arm is arranged on the in-place cylinder swing arm, and the in-place pressing cylinder is arranged on the frame or the carrying frame.

[0021] The beneficial effect of adopting the above further solution is that when the movable tooling reaches the working position, that is, when it is in the working position, the in-place movable tooling can be pressed by the pressing arm, thereby further ensuring the support stability of the special fixture for the workpiece to be welded.

[0022] Further, a quick changer is arranged on the movable frame to facilitate the robot to grab.

[0023] The beneficial effect of adopting the above further solution is that in order to facilitate the transfer of the movable tooling on the carrying frame and the buffer frame more conveniently, a robot can be selected for transfer, and the transfer efficiency is high. In order to ensure the grasping of the movable tooling by the robot, a quick changer can be installed on the movable frame to facilitate the docking of the movable tooling and the robot.

[0024] Further, a buffer pressing mechanism for positioning the movable tooling on the buffer frame is arranged on the buffer frame.

[0025] The beneficial effect of adopting the above further solution is that the movable tooling cached on the buffer frame is pressed, which can further ensure the positioning stability of the movable tooling on the buffer mechanism.

[0026] Further, the buffer pressing mechanism includes a buffer pressing plate and a buffer pressing cylinder for driving the buffer pressing plate to act on the movable tooling. A buffer cylinder swing arm is arranged on the buffer pressing cylinder, and the buffer pressing plate is connected to the buffer cylinder swing arm.

[0027] The beneficial effects of adopting the above further solution are that the movable frame can be placed on the buffer frame through positioning blocks, positioning pins, etc. provided on the buffer frame. To further ensure the stability of the movable tooling on the buffer frame, a buffer pressing mechanism can also be added to the buffer frame. When the movable tooling is placed on the buffer frame, it acts on the movable tooling through the buffer pressing plate to prevent the movable tooling from falling. When it is necessary to transfer the movable tooling, the buffer pressing plate can move away from the movable tooling under the action of the buffer pressing cylinder, avoiding interference with the transfer of the movable tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the fixing tooling and the carrying frame of the present invention;

[0029] Figure 2 is a schematic structural diagram of the buffer mechanism of the present invention;

[0030] Figure 3 is a schematic structural diagram of the movable tooling of the present invention;

[0031] In the figure, 1, fixed substrate; 2, common fixture; 3, carrying frame; 4, carrying platform; 5, positioning member; 6, slide rail; 7, sliding drive cylinder; 8, pressing arm; 9, in-place pressing cylinder; 10, moving air supply end; 11, limiting mechanism I; 12, limiting mechanism II; 13, buffer frame; 14, buffer pressing plate; 15, buffer pressing cylinder; 16, movable frame; 17, special fixture; 18, quick changer; 19, fixed air supply end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The principles and features of the present invention will be described below in conjunction with examples. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0033] As Figures 1-3 shown, a flexible quick-change device for a welding line includes a fixing tooling, a movable tooling and a buffer mechanism. The fixing tooling is arranged on a frame. The fixing tooling includes a fixed substrate 1 and a common fixture 2 arranged on the fixed substrate 1. The fixed substrate 1 is arranged on the frame. The frame is also provided with a carrying frame 3 for carrying the movable tooling, and the carrying frame 3 is provided with a positioning mechanism for positioning the movable tooling;

[0034] The buffer mechanism includes a buffer frame 13, and the buffer frame 13 is arranged on the side of the frame; it is convenient for the movable tooling to be efficiently replaced during die change. The movable tooling includes a movable frame 16 and a special fixture 17 arranged on the movable frame 16;

[0035] When not in use, the movable tooling can be cached on the cache frame 13. When in use, the movable tooling can be moved from the cache frame 13 to the bearing frame 3. The common fixture 2 and the special fixture 17 cooperate to position the workpiece.

[0036] The positioning mechanism includes a bearing platform 4 provided on the bearing frame 3, and a positioning member 5 for the movable tooling is provided on the bearing platform 4. When the movable tooling for the corresponding vehicle model is transferred from the cache frame 13 to the bearing frame 3, it can be directly transferred to the bearing platform 4, and the stable positioning of the movable tooling on the bearing platform 4 is achieved through the positioning member 5, so as to ensure that the special fixture 17 of the movable tooling can cooperate with the common fixture 2 to stably support the workpiece of the corresponding vehicle model.

[0037] The bearing platform 4 is arranged on the bearing frame 3 through a sliding mechanism, and the bearing platform 4 has one or more in-place positions. The bearing platform 4 can be slidably arranged on the bearing frame 3 through the sliding mechanism, and the bearing platform 4 can slide under the action of the sliding mechanism, so as to adjust the position of the bearing platform 4 on the bearing frame 3, realize the adjustment of different in-place positions of the special fixture of the movable tooling, meet the requirements of the in-place positions of the special fixtures on different movable toolings, and thus realize the clamping and positioning of the workpieces of different vehicle models. When model change production is required, if the positions of the workpieces clamped by the special fixtures of the vehicle model being produced and the vehicle model to be replaced are the same, the bearing platform 4 has one in-place position. If the positions of the workpieces clamped by the special fixtures of the vehicle model being produced and the vehicle model to be replaced are different, the bearing platform will have two in-place positions to meet the positioning requirements of the workpieces of the vehicle model in production and the workpieces of the vehicle model to be replaced.

[0038] The sliding mechanism includes a sliding drive cylinder 7. The bearing platform 4 is arranged on the bearing frame 3 through a slide rail 6. The cylinder block of the sliding drive cylinder 7 is arranged on the bearing frame 3, and the piston rod of the sliding drive cylinder 7 is connected to the bearing platform 4. The sliding drive cylinder can be used to drive the bearing platform, so as to meet the requirements of the working positions of the movable toolings for different vehicle models.

[0039] A limiting mechanism for limiting the in-place position of the bearing platform 4 is correspondingly provided on the bearing frame 3 and / or the machine frame. The bearing platform 4 can move the movable tooling of the corresponding vehicle model to the position of its corresponding working position under the action of the sliding mechanism. In order to further ensure the in-place accuracy of the movable tooling, a limiting mechanism can also be set at the in-place position. Different in-place positions can be correspondingly provided with a limiting mechanism 11, a limiting mechanism 12, etc. The limiting mechanism can adopt a limiting block arranged on the machine frame or the bearing frame. The installation position of the limiting mechanism should avoid interfering with the sliding of the bearing platform carrying the movable tooling.

[0040] It further includes an in-place pressing mechanism for pressing the in-place movable tooling, and the in-place pressing mechanism is arranged on the machine frame and / or the carrying frame 3. Pressing the movable tooling after it reaches the in-place position on the carrying frame further ensures the stability of the special fixture in the working position.

[0041] When the positions of the clamping workpieces of the special fixtures for the vehicle model being produced and the vehicle model to be replaced are the same, the carrying platform 4 has an in-place position, and the in-place pressing mechanism can be arranged on the inner side and the outer side of the carrying platform, as Figure 1 shown, so that the positioning of the movable tooling by the inner and outer in-place pressing mechanisms is more stable and reliable.

[0042] The in-place pressing mechanism includes a pressing arm 8 and an in-place pressing cylinder 9 for driving the pressing arm 8. An in-place cylinder swing arm is arranged on the in-place pressing cylinder 9, the pressing arm 8 is arranged on the in-place cylinder swing arm, and the in-place pressing cylinder 9 is arranged on the machine frame or the carrying frame 3. When the movable tooling reaches the working position, that is, when it is in the working position, the in-place movable tooling can be pressed by the pressing arm 8, thereby further ensuring the support stability of the special fixture 17 for the workpiece to be welded.

[0043] A quick changer 18 facilitating the robot to grab is arranged on the movable frame 16. In order to more conveniently transfer the movable tooling between the carrying frame 3 and the buffer frame 13, it can be selectively carried out by using a robot, with high transfer efficiency. In order to ensure the robot to grab the movable tooling, a quick changer 18 can be installed on the movable frame 16 to facilitate the docking between the movable tooling and the robot.

[0044] A buffer pressing mechanism for positioning the movable tooling on the buffer frame 13 is arranged on the buffer frame 13. Pressing the movable tooling cached on the buffer frame 13 can further ensure the positioning stability of the movable tooling on the buffer mechanism.

[0045] The buffer pressing mechanism includes a buffer pressing plate 14 and a buffer pressing cylinder 15 for driving the buffer pressing plate 14 to act on the movable tooling. A buffer cylinder swing arm is arranged on the buffer pressing cylinder 15, and the buffer pressing plate 14 is connected to the buffer cylinder swing arm. The movable frame 16 can be arranged on the buffer frame 13 so that positioning parts 5 such as positioning blocks and positioning pins are placed on the buffer frame 13. In order to further ensure the stability of the movable tooling on the buffer frame 13, a buffer pressing mechanism can be additionally arranged on the buffer frame 13. When the movable tooling is placed on the buffer frame 13, the buffer pressing plate 14 acts on the movable tooling to prevent the movable tooling from falling. When the movable tooling needs to be transferred, the buffer pressing plate 14 can be separated from the movable tooling under the action of the buffer pressing cylinder 15 to avoid interfering with the transfer of the movable tooling.

[0046] For the rotation of the in-place cylinder swing arm or the buffer cylinder swing arm, the specific cylinder swing arm is rotationally arranged on the housing or the cylinder block through the arm shaft. The housing is connected to the cylinder block. The cylinder swing arm can rotate with the arm shaft. The arm shaft can rotate under the action of the in-place pressing cylinder or the buffer pressing cylinder. Specifically, the piston rod can drive the arm shaft to rotate through the connecting rod, so as to realize the rotational drive of the cylinder swing arm. The pressing arm acts on the movable tooling to realize the stable positioning of the movable tooling on the bearing platform. The buffer pressing plate acts on the movable tooling to realize the stable positioning of the movable tooling on the buffer frame.

[0047] The buffer pressing plate 14 can be of a circular structure. The buffer pressing plate 14 can act on the quick changer 18 on the movable tooling. On the one hand, it can achieve the purpose of buffering and pressing the movable tooling. On the other hand, it can also prevent dust from falling into the quick changer 18 and affecting its docking with the robot. The buffer pressing plate 14 is connected to the buffer cylinder swing arm through a connecting rod.

[0048] The bearing frame 3 is connected to the machine frame through a connecting bracket. The stable positioning of the bearing frame 3 on the side of the machine frame is realized through the connecting bracket.

[0049] When a cylinder is used to drive the special fixture 17 on the movable tooling, in order to meet the normal use of the special fixture 17, a movable gas supply end 10 is arranged on the bearing platform 4 and can move with the bearing platform 4. A fixed gas supply end 19 is arranged on the movable tooling. The fixed gas supply end 19 can be installed on the movable frame through a bracket. When the movable tooling is positioned on the bearing platform 4, the fixed gas supply end 19 can be docked with the movable gas supply end 10 to realize ventilation. After ventilation, the cylinder can drive the fixture, so as to clamp the workpiece through the special fixture 17 and cooperate with the common fixture 2 to clamp the workpiece of the corresponding vehicle model, realizing the positioning of the workpiece and the welding operation on the workpiece.

[0050] The movable tooling structure with a special fixture of the present utility model is simple, convenient for processing, assembly and subsequent maintenance. During the production of the welding line, only a single vehicle model fixture exists at the vehicle model difference part. The welding torch has a large movable space, better operability, convenient welding, improving the welding production beat, reducing the manufacturing cost. The number of vehicle models can be set as required without limitation. The corresponding movable tooling is buffered on the buffer mechanism, with a high degree of flexibility, convenient and fast automatic model change, and high efficiency.

[0051] When changing the production model, it is tentatively set that the production model is A and the production model is changed to B. There is a first limiting mechanism 11 on the bearing frame or the frame. The first limiting mechanism 11 corresponds to the in-place position of the movable tooling of model A. There is a second limiting mechanism 12 on the bearing frame. The second limiting mechanism 12 corresponds to the in-place position of the movable tooling of model B. When producing model A, the bearing platform 4 is in the limiting position of the first limiting mechanism 11. The robot grabs the movable tooling of model A through the quick changer 18 on model A. The bearing platform 4 slides to the limiting position of the second limiting mechanism 12, that is, the in-place position of the movable tooling of model B. The robot places the movable tooling of model A on the upper part of the buffer mechanism, and then takes out the movable tooling of model B from the lower part of the buffer mechanism through the quick changer 18 of the movable tooling of model B and places it on the positioning mechanism of the bearing frame 3. Then the in-place pressing mechanism presses it tightly to complete the model change. After the model change, the movable tooling is positioned. The movable gas supply end 10 and the fixed gas supply end 19 are docked. After ventilation, the special fixture 17 can clamp the workpiece of model B, and can cooperate with the common fixture 2 to clamp the workpiece of model B, so as to realize the welding operation of the workpiece of model B.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flexible quick-change device for a welding line, characterized in that It includes a fixed tooling, a movable tooling and a buffer mechanism. The fixed tooling is arranged on the frame. The fixed tooling includes a fixed base plate (1) and a common fixture (2) arranged on the fixed base plate (1). The fixed base plate (1) is arranged on the frame. A carrying frame (3) for carrying the movable tooling is also arranged on the frame, and a positioning mechanism for positioning the movable tooling is arranged on the carrying frame (3). The buffer mechanism includes a buffer frame (13), and the movable tooling includes a movable frame (16) and a special fixture (17) arranged on the movable frame (16). The movable tooling can be buffered on the buffer frame (13) when not in use, and can be moved from the buffer frame (13) to the carrying frame (3) when in use. The common fixture (2) and the special fixture (17) cooperate to position the workpiece.

2. The flexible quick-change device for the welding line according to claim 1, characterized in that, The positioning mechanism includes a carrying platform (4) arranged on the carrying frame (3), and a positioning member (5) for the movable tooling is arranged on the carrying platform (4).

3. The flexible quick-change device for the welding line according to claim 2, characterized in that, The carrying platform (4) is arranged on the carrying frame (3) through a sliding mechanism, and the carrying platform (4) has one or more in-place positions.

4. The flexible quick-change device for the welding line according to claim 3, wherein, The sliding mechanism includes a sliding drive cylinder (7). The carrying platform (4) is arranged on the carrying frame (3) through a slide rail (6). The cylinder body of the sliding drive cylinder (7) is arranged on the carrying frame (3), and the piston rod of the sliding drive cylinder (7) is connected to the carrying platform (4).

5. The flexible quick-change device for the welding line according to claim 3, wherein A limiting mechanism for limiting the in-place positions of the carrying platform is correspondingly arranged on the carrying frame and / or the frame.

6. The flexible quick-change device for the welding line according to any one of claims 1-5, characterized in that, It also includes an in-place pressing mechanism for pressing the in-place movable tooling, and the in-place pressing mechanism is arranged on the frame and / or the carrying frame (3).

7. The flexible quick-change device for the welding line according to claim 6, characterized in that The in-place pressing mechanism includes a pressing arm (8) and an in-place pressing cylinder (9) for driving the pressing arm (8). An in-place cylinder swing arm is arranged on the in-place pressing cylinder (9), and the pressing arm (8) is arranged on the in-place cylinder swing arm. The in-place pressing cylinder (9) is arranged on the frame or the carrying frame (3).

8. The flexible quick-change device for the welding line according to any one of claims 1-5, characterized in that, A quick changer (18) convenient for the robot to grasp is arranged on the movable frame (16).

9. The flexible quick-change device for the welding line according to any one of claims 1-5, characterized in that, A buffer pressing mechanism for positioning the movable tooling on the buffer frame (13) is arranged on the buffer frame (13).

10. The flexible quick-change device for the welding line according to claim 9, wherein The buffer pressing mechanism includes a buffer pressing plate (14) and a buffer pressing cylinder (15) for driving the buffer pressing plate (14) to act on the movable tooling. A buffer cylinder swing arm is arranged on the buffer pressing cylinder (15), and the buffer pressing plate (14) is connected to the buffer cylinder swing arm.

Images