A clamp structure

Abstract

This utility model relates to the field of welding fixture technology, and more specifically, to a fixture structure, including a mounting base, a first clamping block, a support block, a controller, a driving device for driving the first clamping block to move, and a sensing component capable of sensing the distance between the first clamping block and the support block. The support block and the driving device are fixedly mounted on the mounting base, the output end of the driving device is fixedly connected to the first clamping block, and the sensing component is connected to the controller. In use, taking welding a bracket part to a body part as an example, the body part is mounted on the mounting base, and the bracket part is placed on the support block so that the bracket part abuts against the part of the body part to be welded. The driving device drives the first clamping block to press the bracket part firmly onto the support block to prevent the bracket part from shifting. If the bracket parts overlap, the sensing component detects that the distance between the first clamping block and the support block is greater than the thickness of a single layer of bracket parts, and the controller controls the welding machine to stop, thereby avoiding multiple welding.

Description

Technical Field

[0001] This utility model relates to the field of welding tooling technology, and more specifically, to a clamp structure. Background Technology

[0002] In automotive sheet metal parts, there are many small sheet metal brackets that are connected to the assembly parts by spot welding. These small bracket parts are cold stamped and, due to their simple structure, are usually stacked after stamping and placed in storage packaging containers. When personnel handle the parts, they may accidentally pick up multiple overlapping parts. If the operator does not identify them and directly places them on the welding fixture for clamping and welding, multiple welding problems will occur, resulting in the scrapping of the parts. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies that cannot identify overlapping parts during welding, and to provide a fixture structure that can identify the occurrence of overlapping parts, stop welding, and avoid the problem of multiple welding.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A clamping structure is provided, including a mounting base, a first clamping block, a support block, a controller, a driving device for driving the first clamping block to move, and a sensing component capable of sensing the distance between the first clamping block and the support block. The support block and the driving device are fixedly mounted on the mounting base, the output end of the driving device is fixedly connected to the first clamping block, and the sensing component is connected to the controller.

[0006] The fixture structure of this utility model mounts a support block and a drive device on a mounting base, and a first clamping block is mounted on the output end of the drive device. When preparing for welding, taking welding a bracket part to a body part as an example, the body part is fixedly mounted on the mounting base, and the bracket part to be welded is placed on the support block. The height of the support block is rationally designed according to the dimensions of the bracket part and the body part, ensuring that the parts to be welded overlap and abut against each other. The drive device drives the first clamping block to press the bracket part to be welded firmly onto the support block, preventing displacement. If the bracket parts to be welded do not overlap, the sensing component detects that the distance between the first clamping block and the support block is equal to the thickness of a single layer of the bracket part. The sensing component transmits a signal to the controller, which then controls the welding machine to weld the overlapping part of the bracket part and the body part. If the bracket parts to be welded overlap, the multiple bracket parts push up the first clamping block. The sensing component detects that the distance between the first clamping block and the support block is greater than the thickness of a single layer of the bracket part. The sensing component transmits a signal to the controller, which then transmits an abnormal signal to the welding machine, stopping the welding machine and preventing multiple welds.

[0007] Furthermore, the sensing component includes a sensor disposed on the support block and / or the first clamping block, and the sensor is connected to the controller. If the sensor detects that the distance between the first clamping block and the support block is greater than the thickness of the single-layer support component, the sensor transmits a signal to the controller, the controller transmits an abnormal signal to the welding machine, and the welding machine stops, ceasing welding.

[0008] Furthermore, the sensor is a proximity switch sensor. Taking the sensor being mounted on the support block as an example, the distance between the first clamping block and the support block when the first clamping block presses against the bracket parts is calculated and set as the standard distance. This standard distance is then set as the sensor's sensing distance. When the bracket parts overlap, the distance between the first clamping block and the sensor is greater than the standard distance, and the sensor cannot detect the first clamping block. The sensor then transmits a signal to the controller, which in turn controls the welding machine to stop welding. The proximity switch sensor has a long lifespan, fast response speed, and low cost.

[0009] Furthermore, the sensor's sensing distance is 2mm. When the sensor detects a distance greater than 2mm between the first clamping block and the sensor, it indicates that the bracket components are overlapping.

[0010] Furthermore, the sensing component also includes a mounting bracket disposed on the side of the support block, with the sensor mounted on the mounting bracket and the first clamping block located within the sensing range of the sensor. Compared to placing the sensor on the top of the support block, placing the sensor on the side of the support block avoids interference between the sensor and components such as the first clamping block and the bracket, facilitating installation.

[0011] Furthermore, a nut is fixedly mounted on the mounting bracket, and the side wall of the sensor has an external thread that mates with the internal thread of the nut. The sensor is installed in the threaded hole of the nut. By rotating the sensor, the sensor can be moved along the axis of the threaded hole, changing the distance between the sensor and the first clamping block. The distance between the sensor and the first clamping block can be flexibly adjusted according to the specifications of the sensor and the thickness of the bracket parts, enabling the sensor to accurately identify whether the bracket parts overlap under different working conditions such as sensor specifications and bracket part thickness, thus improving the flexibility of the fixture structure.

[0012] Furthermore, the first clamping block includes a clamping part and a sensing part. The sensing part is connected to the side of the clamping part, and the output end of the driving device is fixedly connected to the clamping part. The bottom of the sensing part is lower than the top of the support block, and the bottom of the sensing part is located above the sensor. When the distance between the sensing part and the sensor is greater than the standard distance, the sensor cannot detect the sensing part, and the sensor transmits a signal to the controller, which then controls the welding machine to stop welding. The standard distance is the distance between the sensing part and the sensor when the clamping part clamps a single-layer bracket part. The bottom of the sensing part is lower than the top of the support block, which shortens the distance between the first clamping block and the sensor, improving detection accuracy.

[0013] Furthermore, it also includes a second clamping block, which is fixedly connected to the output end of the drive device. While the first clamping block presses the bracket component against the support block, the second clamping block can press other parts of the bracket component, thereby fixing the bracket component more stably.

[0014] Furthermore, the mounting base is provided with several locating pins that can pass through the parts to be welded. When installing the body part and the bracket part, the several locating pins pass through the body part and the bracket part simultaneously to position the body part and the bracket part, ensuring that the parts of the body part and the bracket part to be welded can accurately overlap.

[0015] Further, the mounting base includes a base, a first support base, and a second support base. The driving device includes a cylinder and a cylinder arm. The first and second support bases are fixedly mounted on the base. The support block is fixedly mounted on the first support base. The cylinder is fixedly mounted on the second support base. One end of the cylinder arm is rotatably connected to the output end of the cylinder, and the other end is fixedly connected to the first clamping block. The cylinder arm is rotatably connected to the second support base, and the connection point between the cylinder arm and the second support base is located between the output end of the cylinder and the first clamping block. When the driving device is working, the cylinder drives one end of the cylinder arm to move, causing the cylinder arm to rotate around the second support base, causing the other end of the cylinder arm to move, thereby driving the first clamping block fixedly connected to the cylinder arm to clamp the bracket parts.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The fixture structure of this utility model has the following characteristics: 1. When the sensing component detects that the distance between the first clamping block and the support block is greater than the thickness of the single-layer bracket part, the sensing component transmits a signal to the controller, the controller transmits an abnormal signal to the welding machine, the welding machine stops, and welding is not performed, thereby avoiding over-welding of parts; 2. A proximity switch sensor is used for detection, which has a long service life, fast response speed, and low cost; 3. Placing the sensor on the side of the support block can avoid interference between the sensor and the first clamping block, bracket parts, and other components, making installation easier; 4. The distance between the sensor and the first clamping block can be flexibly adjusted according to the sensor specifications and the thickness of the bracket parts, so that the sensor can accurately identify whether the bracket parts overlap under different working conditions such as sensor specifications and bracket part thickness, improving the flexibility of the fixture structure; 5. The bottom of the sensing part is lower than the top of the support block, shortening the distance between the first clamping block and the sensor, improving detection accuracy. Attached Figure Description

[0018] Figure 1 This is a first structural schematic diagram of the clamp structure of this utility model;

[0019] Figure 2 This is a second structural schematic diagram of the clamp structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the support block and sensing component of the clamp structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the first clamping block of the clamping structure of this utility model.

[0022] In the attached diagram: 1. First clamping block; 11. Clamping part; 12. Sensing part; 2. Second clamping block; 3. Support block; 4. Sensing component; 41. Sensor; 42. Mounting bracket; 43. Nut; 5. Drive device; 51. Cylinder; 52. Cylinder arm; 6. Mounting seat; 61. Base; 62. First support seat; 63. Second support seat; 7. Body part; 8. Bracket part; 81. Weld point; 9. Positioning pin. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] Example 1

[0026] like Figures 1 to 4 The first embodiment of the clamp structure of this utility model is shown, including a mounting base 6, a first clamping block 1, a support block 3, a controller, a driving device 5 for driving the first clamping block 1 to move, and a sensing component 4 capable of sensing the distance between the first clamping block 1 and the support block 3. The support block 3 and the driving device 5 are fixedly mounted on the mounting base 6. The output end of the driving device 5 is fixedly connected to the first clamping block 1. The sensing component 4 is connected to the controller.

[0027] The fixture structure of this utility model mounts the support block 3 and the driving device 5 on the mounting base 6, and the first clamping block 1 is mounted on the output end of the driving device 5. When preparing for welding, taking welding the bracket part 8 to the body part 7 as an example, the body part 7 is fixedly mounted on the mounting base 6, and the bracket part 8 to be welded is placed on the support block 3. The height of the support block 3 is reasonably designed according to the dimensions of the bracket part 8 and the body part 7, so that the bracket part 8 overlaps and abuts against the part of the body part 7 to be welded. The driving device 5 drives the first clamping block 1 to press the bracket part 8 to be welded onto the support block 3, preventing the bracket part 8 from shifting. If the bracket parts 8 to be welded do not overlap, the sensing component 4 detects that the distance between the first clamping block 1 and the support block 3 is equal to the thickness of a single-layer bracket part 8. The sensing component 4 transmits a signal to the controller, and the controller controls the welding machine to weld the overlapping parts of the bracket parts 8 and the body parts 7. If the bracket parts 8 to be welded overlap, the multi-layer bracket parts 8 lift the first clamping block 1. The sensing component 4 detects that the distance between the first clamping block 1 and the support block 3 is greater than the thickness of a single-layer bracket part 8. The sensing component 4 transmits a signal to the controller, and the controller transmits an abnormal signal to the welding machine. The welding machine stops and does not perform welding, thereby avoiding multiple welding.

[0028] like Figure 3As shown, the sensing component 4 includes a sensor 41, which is mounted on the support block 3 and / or the first clamping block 1. The sensor 41 is connected to the controller. When the sensor 41 detects that the distance between the first clamping block 1 and the support block 3 is greater than the thickness of the single-layer support component 8, the sensor 41 transmits a signal to the controller. The controller then transmits an abnormal signal to the welding machine, causing the welding machine to stop and cease welding.

[0029] Sensor 41 is a proximity switch sensor. Taking sensor 41 mounted on support block 3 as an example, the distance between first clamping block 1 and support block 3 when first clamping block 1 presses against bracket part 8 is calculated and set as the standard distance. This standard distance is then set as the sensing distance of sensor 41. When bracket part 8 overlaps, the distance between first clamping block 1 and sensor 41 is greater than the standard distance, and sensor 41 cannot detect first clamping block 1. Sensor 41 transmits a signal to controller, and controller stops welding. Proximity switch sensors have long lifespan, fast response speed, and low cost. In this embodiment, sensor 41 is an inductive proximity switch, and first clamping block 1 is made of conductive metal material.

[0030] The sensing distance of sensor 41 is 2mm. When sensor 41 detects that the distance between the first clamping block 1 and sensor 41 is greater than 2mm, it indicates that the bracket parts 8 are overlapping.

[0031] The working principle of the fixture structure in this embodiment is as follows: When preparing for welding, taking the welding of bracket part 8 to body part 7 as an example, the body part 7 is fixedly installed on the mounting base 6, and the bracket part 8 to be welded is placed on the support block 3. According to the dimensions of the bracket part 8 and the body part 7, the height of the support block 3 is reasonably designed so that the bracket part 8 and the part of the body part 7 to be welded overlap and abut. The driving device 5 drives the first clamping block 1 to press the bracket part 8 to be welded onto the support block 3 to prevent the bracket part 8 from shifting; if the bracket part 8 to be welded does not overlap, the transmission... When sensor 41 detects that the distance between the first clamping block 1 and sensor 41 is equal to 2mm, the sensing component 4 transmits a signal to the controller, and the controller controls the welding machine to work normally and weld the overlapping parts of the bracket part 8 and the body part 7. If the bracket part 8 to be welded overlaps, the multi-layer bracket part 8 will lift the first clamping block 1, and the distance between the first clamping block 1 and sensor 41 will be greater than 2mm. Sensor 41 will not be able to detect the first clamping block 1, and sensor 41 will transmit a signal to the controller. The controller will transmit an abnormal signal to the welding machine, and the welding machine will stop and not perform welding, thereby avoiding multiple welding.

[0032] Example 2

[0033] This embodiment is the second embodiment of the clamp structure of this utility model. This embodiment is similar to the first embodiment, except that, as Figure 3 As shown, the sensing component 4 also includes a mounting bracket 42, which is disposed on the side of the support block 3. The sensor 41 is mounted on the mounting bracket 42, and the first clamping block 1 is located within the sensing range of the sensor 41. Compared to placing the sensor 41 on the top of the support block 3, placing the sensor 41 on the side of the support block 3 can avoid interference between the sensor 41 and components such as the first clamping block 1 and the bracket part 8, and facilitates installation.

[0034] like Figure 3 As shown, a nut 43 is fixedly mounted on the mounting bracket 42. The side wall of the sensor 41 has an external thread that mates with the internal thread of the nut 43. The sensor 41 is installed in the threaded hole of the nut 43. By rotating the sensor 41, the sensor 41 can be moved along the axis of the threaded hole, changing the distance between the sensor 41 and the first clamping block 1. The distance between the sensor 41 and the first clamping block 1 can be flexibly adjusted according to the specifications of the sensor 41 and the thickness of the bracket part 8. This allows the sensor 41 to accurately identify whether the bracket part 8 overlaps under different working conditions, such as the specifications of the sensor 41 and the thickness of the bracket part 8, thus improving the flexibility of the fixture structure.

[0035] like Figure 4 As shown, the first clamping block 1 includes a clamping part 11 and a sensing part 12. The sensing part 12 is connected to the side of the clamping part 11, and the output end of the drive device 5 is fixedly connected to the clamping part 11. The bottom of the sensing part 12 is lower than the top of the support block 3, and the bottom of the sensing part 12 is located above the sensor 41. When the distance between the sensing part 12 and the sensor 41 is greater than the standard distance, the sensor 41 cannot sense the sensing part 12, and the sensor 41 transmits a signal to the controller, which controls the welding machine to stop welding. The standard distance is the distance between the sensing part 12 and the sensor 41 when the clamping part 11 clamps the single-layer bracket part 8. The bottom of the sensing part 12 is lower than the top of the support block 3, which shortens the distance between the first clamping block 1 and the sensor 41 and improves the detection accuracy.

[0036] The working principle of the fixture structure in this embodiment is as follows: The support block 3 and the drive device 5 are installed on the mounting base 6. The first clamping block 1 is installed on the output end of the drive device 5. The nut 43 is installed on the mounting bracket 42 located on the side of the support block 3. The sensor 41 is installed in the screw hole of the nut 43. The sensor 41 is rotated to move along the axis of the screw hole. The distance between the sensor 41 and the first clamping block 1 is adjusted so that when the first clamping block 1 clamps the single-layer bracket part 8, the distance between the first clamping block 1 and the sensor 41 is equal to the sensing distance of the sensor 41, i.e., the standard distance is equal to the sensing distance of the sensor 41. When preparing for welding, the main body part 7 is fixedly installed on the mounting base 6, and the bracket part 8 to be welded is placed on the support block. 3. The bracket part 8 and the body part 7 to be welded overlap and abut. The driving device 5 drives the first clamping block 1 to press the bracket part 8 to be welded onto the support block 3 to prevent the bracket part 8 from shifting. If the bracket part 8 to be welded does not overlap, the sensor 41 detects that the distance between the sensing part 12 and the sensor 41 is equal to 2mm. The sensing component 4 transmits a signal to the controller, and the controller controls the welding machine to work normally and weld the overlapping part of the bracket part 8 and the body part 7. If the bracket part 8 to be welded overlaps, the distance between the sensing part 12 and the sensor 41 is greater than 2mm. The sensor 41 cannot detect the sensing part 12. The sensor 41 transmits a signal to the controller, and the controller transmits an abnormal signal to the welding machine. The welding machine stops and does not perform welding.

[0037] Example 3

[0038] This embodiment is the third embodiment of the clamping structure of this utility model. This embodiment is similar to the second embodiment, except that it also includes a second clamping block 2, which is fixedly connected to the output end of the driving device 5. When the first clamping block 1 presses the bracket part 8 onto the support block 3, the second clamping block 2 can press other parts of the bracket part 8, thereby fixing the bracket part 8 more stably.

[0039] like Figure 1 As shown, the mounting base 6 is provided with several positioning pins 9 that can pass through the parts to be welded. When installing the main body part 7 and the bracket part 8, the positioning pins 9 pass through the main body part 7 and the bracket part 8 simultaneously to position the main body part 7 and the bracket part 8, ensuring that the parts of the main body part 7 and the bracket part 8 to be welded can accurately overlap.

[0040] In this embodiment, there are two second clamping blocks 2 and two positioning pins 9. The bracket part 8 is provided with three welding points 81. The two second clamping blocks 2 are respectively pressed between two sets of adjacent welding points 81 of the bracket part 8. The two positioning pins 9 pass through the overlapping part of the bracket part 8 and the main body part 7 located between the two sets of adjacent welding points 81.

[0041] like Figure 2 As shown, the mounting base 6 includes a base 61, a first support base 62, and a second support base 63. The driving device 5 includes a cylinder 51 and a cylinder arm 52. The first support base 62 and the second support base 63 are fixedly mounted on the base 61. The support block 3 is fixedly mounted on the first support base 62. The cylinder 51 is fixedly mounted on the second support base 63. One end of the cylinder arm 52 is rotatably connected to the output end of the cylinder 51, and the other end is fixedly connected to the first clamping block 1. The cylinder arm 52 is rotatably connected to the second support base 63, and the connection point between the cylinder arm 52 and the second support base 63 is located between the output end of the cylinder 51 and the first clamping block 1. When the driving device 5 is working, the cylinder 51 drives one end of the cylinder arm 52 to move, causing the cylinder arm 52 to rotate around the second support base 63, causing the other end of the cylinder arm 52 to move, thereby driving the first clamping block 1 and the second clamping block 2, which are fixedly connected to the cylinder arm 52, to clamp the bracket part 8. In this embodiment, the positioning pin 9 is fixedly mounted on the first support base 62.

[0042] The working principle of the fixture structure in this embodiment is as follows: Two positioning pins 9 are fixedly installed on the mounting base 6. The main body part 7 and the support block 3 are installed on the first support base 62. When preparing for welding, the bracket part 8 is placed on the support block 3, so that the two positioning pins 9 pass through the main body part 7 and the bracket part 8 at the same time. The cylinder 51 drives the cylinder arm 52 to rotate around the second support base 63, so that the cylinder arm 52 drives the first clamping block 1 and the second clamping block 2 to move. The first clamping block 1 presses the bracket part 8 on the support block 3. The two second clamping blocks 2 press between two sets of adjacent welding points 81 of the bracket part 8 to prevent the bracket part 8 from shifting. Based on the measurement results of the sensor 41, it is decided whether to carry out the welding work.

[0043] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0044] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A clamp structure, characterized by, The device includes a mounting base (6), a first clamping block (1), a support block (3), a controller that can be connected to a welding machine, a drive device (5) for driving the first clamping block (1) to move, and a sensing component (4) that can sense the distance between the first clamping block (1) and the support block (3). The support block (3) and the drive device (5) are fixedly mounted on the mounting base (6). The output end of the drive device (5) is fixedly connected to the first clamping block (1). The sensing component (4) is connected to the controller.

2. The clamp structure according to claim 1, characterized by The sensing component (4) includes a sensor (41) disposed on the support block (3) and / or the first clamping block (1), and the sensor (41) is connected to the controller.

3. The clamp structure according to claim 2, wherein The sensor (41) is a proximity switch sensor.

4. The clamp structure according to claim 3, wherein The sensing distance of the sensor (41) is 2mm.

5. The clamp structure according to claim 3, wherein The sensing component (4) also includes a mounting bracket (42) which is disposed on the side of the support block (3). The sensor (41) is mounted on the mounting bracket (42), and the first clamping block (1) is located within the sensing range of the sensor (41).

6. The clamp structure according to claim 5, wherein A nut (43) is fixedly installed on the mounting bracket (42), and the side wall of the sensor (41) is provided with an external thread that mates with the internal thread of the nut (43). The sensor (41) is installed in the threaded hole of the nut (43).

7. The clamp structure according to claim 5 or 6, characterized by The first clamping block (1) includes a clamping part (11) and a sensing part (12). The sensing part (12) is connected to the side of the clamping part (11). The output end of the driving device (5) is fixedly connected to the clamping part (11). The bottom of the sensing part (12) is lower than the top of the support block (3). The bottom of the sensing part (12) is located above the sensor (41).

8. The clamp structure of claim 1, wherein It also includes a second clamping block (2), which is fixedly connected to the output end of the drive device (5).

9. The clamp structure according to claim 1, wherein The mounting base (6) is provided with several positioning pins (9) that can pass through the parts that need to be welded.

10. The clamp structure according to claim 1, wherein The mounting base (6) includes a base (61), a first support base (62), and a second support base (63). The driving device (5) includes a cylinder (51) and a cylinder arm (52). The first support base (62) and the second support base (63) are fixedly mounted on the base (61). The support block (3) is fixedly mounted on the first support base (62). The cylinder (51) is fixedly mounted on the second support base (63). One end of the cylinder arm (52) is rotatably connected to the output end of the cylinder (51), and the other end is fixedly connected to the first clamping block (1). The cylinder arm (52) is rotatably connected to the second support base (63). The connection point between the cylinder arm (52) and the second support base (63) is located between the output end of the cylinder (51) and the first clamping block (1).

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