Clamp for steel structure machining

Abstract

The utility model relates to mechanical manufacturing technical field, and disclose a kind of clamp for steel structure processing, including base, multiple pneumatic devices are symmetrically arranged on base, pneumatic device is arranged towards positioning clamp, positioning clamp is array distribution and drive device is penetrated in middle part, base other side is also provided with suction extractor.The utility model introduces repelling magnet and spring between positioning clamp and base, which forms a unique magnetic force suspension guiding buffering mechanism, compared with traditional mechanical contact friction, direct wear of workpiece is avoided, and the effect of reducing damage is achieved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, specifically a fixture for steel structure processing. Background Technology

[0002] Steel structure processing fixtures refer to the process equipment used to accurately position, tighten, and support workpieces during the processing and manufacturing of steel structures, such as blanking, assembly, welding, straightening, and drilling.

[0003] In existing technologies, steel structure processing relies heavily on manual clamping and wrench tightening, resulting in high labor intensity for workers, low clamping efficiency, and inconsistent clamping force depending entirely on worker experience. This leads to large fluctuations in product quality, easy wear of mechanical guide rails, and easy jamming by debris, causing a rapid decline in positioning accuracy. Purely mechanical structures are prone to slight loosening and displacement when subjected to processing vibrations and impacts, affecting processing accuracy. Excessive clamping force or hard impacts can easily cause deformation or indentation in thin-walled or surface-finishing steel structural components. Utility Model Content

[0004] The purpose of this utility model is to provide a clamp for steel structure processing, which solves the problem of severe wear during clamping.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a steel structure processing fixture, including a base, on which multiple pneumatic devices are symmetrically arranged. The pneumatic devices are arranged facing the positioning fixture, which is distributed in an array and has a driving device passing through its middle. A pressure-drawing structure is also provided on the other side of the base.

[0006] Furthermore, the base has a sliding groove at the center of its edge, which cooperates with the positioning fixture, and a female magnet is also provided on the base at the position corresponding to the positioning fixture.

[0007] Furthermore, the pneumatic device includes a pneumatic cylinder, the piston rod of the pneumatic cylinder is provided with a shaping plate at its front end, and a limiting plate is provided on the front side of the shaping plate.

[0008] Furthermore, the positioning fixture has a movable cavity inside, which cooperates with the driving device to move the positioning fixture. The upper end of the positioning fixture is provided with a sub-magnet, which is magnetically repelled by the main magnet, and reset and positioning are achieved by a spring.

[0009] Furthermore, the pressure-drawing structure includes a pressure-drawing device, one end of which is connected to an air inlet pipe, and the other end is connected to an air jet needle.

[0010] Furthermore, the driving device includes a drive motor, the output shaft of which is connected to a lead screw. The lead screw has threads and balls on its surface. The balls cooperate with the positioning fixture to convert the rotational motion into linear motion.

[0011] This utility model has the following beneficial effects: This invention introduces repulsive magnets and springs between the positioning fixture and the base, forming a unique magnetic levitation guiding buffer mechanism. Compared with traditional mechanical contact friction, this avoids direct wear on the workpiece and reduces damage.

[0012] This utility model uses a pneumatic cylinder to extend its piston rod, pushing the front shaping plate forward until the shaping plate is tightly pressed against the surface of the steel structure to be processed. At this time, the limiting plate, which is independent of the pneumatic cylinder's driving stroke, precisely limits the maximum stroke of the shaping plate through physical hard blocking, preventing it from excessively pressing and damaging the workpiece or the fixture itself.

[0013] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the working position structure of this utility model; Figure 2 This is a schematic diagram of the base and pneumatic device structure of this utility model; Figure 3 This is a schematic diagram of a half-section of the positioning fixture of this utility model; Figure 4 This is a schematic cross-sectional view of the drive device of this utility model. The attached diagram lists the components represented by each number as follows: In the diagram: 1. Base; 11. Sliding groove; 12. Female magnet; 2. Pneumatic device; 21. Air cylinder; 22. Shaping plate; 23. Limiting plate; 3. Positioning fixture; 31. Movable cavity; 32. Female magnet; 41. Pump; 42. Air jet needle; 43. Air inlet pipe; 5. Drive device; 51. Drive motor; 52. Ball bearing; 53. Thread. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-4 As shown, this utility model is a steel structure processing fixture, including a base 1, on which a plurality of pneumatic devices 2 are symmetrically arranged. The pneumatic devices 2 are arranged facing the positioning fixture 3. The positioning fixture 3 is distributed in an array and a driving device 5 passes through its middle. A pressure-drawing structure is also provided on the other side of the base 1. A sliding groove 11 is provided at the center of the edge of the base 1. The sliding groove 11 cooperates with the positioning clamp 3. A female magnet 12 is also provided on the base 1 at the position corresponding to the positioning clamp 3. The sliding groove 11 provides a precise moving path for the positioning fixture 3. When it is pushed by the driving device 5, it can make a stable linear movement along the sliding groove 11. When the positioning fixture 3 moves to the position corresponding to the female magnet 12, the female magnet 12 set on the base 1 and the female magnet 32 ​​on the positioning fixture 3 generate a repulsive magnetic force. This magnetic force releases the compression spring on the positioning fixture 3, so that the compression spring pushes the female magnet 32 ​​to clamp the workpiece. Together, they provide a non-contact, frictionless buffer and reset force for the positioning fixture 3, which can effectively absorb and offset external impacts or vibrations, thereby extending the service life of the fixture and improving the stability and processing accuracy of the steel structure clamping. The pneumatic device 2 includes a pneumatic cylinder 21, and a shaping plate 22 is provided at the front end of the piston rod of the pneumatic cylinder 21. A limiting plate 23 is provided on the front side of the shaping plate 22. The driving pneumatic cylinder 21 extends its piston rod to push the front shaping plate 22 forward until the shaping plate 22 is tightly pressed against the surface of the steel structure to be processed. At this time, the limiting plate 23, which is independent of the driving stroke of the pneumatic cylinder 21, precisely limits the maximum stroke of the shaping plate 22 by physical hard blocking, preventing it from being over-pressed and damaging the workpiece or the fixture itself. By combining the active clamping force with stroke control, it not only ensures that the clamping is firm and reliable and can effectively resist the vibration and stress during the processing, but also eliminates the workpiece deformation or surface damage caused by overpressure, which greatly improves the processing quality and operational safety. The positioning fixture 3 has a movable cavity 31 inside. The movable cavity 31 cooperates with the driving device 5 to move the positioning fixture 3. The upper end of the positioning fixture 3 is provided with a sub-magnet 32. The sub-magnet 32 ​​and the mother magnet 12 are magnetically repelled and reset and positioned by a spring. The drive device 5 drives the movable cavity 31 inside the positioning fixture 3 through its rotational motion. The sub-magnet 32 ​​set at the upper end of the fixture generates a repulsive magnetic force with the mother magnet 12 on the base 1. The sub-magnet 32 ​​uses the repulsive magnetic force to release the spring and clamp the workpiece. The magnetic repulsion provides the dominant direction and balance force, avoids rigid impact, and significantly improves the stability of clamping and the protection of the workpiece and fixture body. The suction structure includes a suction device 41, one end of which is connected to an air inlet pipe 43, and the other end is connected to a jet needle 42. The suction pump 41 draws in gas through the air inlet pipe 43, then compresses it and ejects it from the jet needle 42 at the other end in a high-speed, concentrated airflow. The ejected airflow is directed toward the lead screw of the drive device 5 to remove residual dust and cool the workpiece. This non-contact operation avoids scratches on the workpiece surface or damage to the fixture that may be caused by traditional mechanical cleaning, and is especially suitable for workpieces after precision machining. The drive device 5 includes a drive motor 51, the output shaft of the drive motor 51 is connected to a lead screw, the surface of the lead screw is provided with a thread 53 and a ball 52, the ball 52 cooperates with the positioning fixture 3 to convert the rotational motion into linear motion; When the drive motor 51 starts, it drives the lead screw to rotate. The balls 52 on the thread 53 of the lead screw rotate in a closed raceway, converting the precise rotational motion of the lead screw into the linear motion of the ball 52 nut. This, in turn, pushes the positioning fixture 3 that it is paired with to produce a high-precision linear displacement along the sliding groove 11. The clamping and loosening of the fixture is achieved by moving closer to and away from the working position. The ball 52 lead screw transmission pair achieves efficient and precise motion conversion. Its frictional resistance is extremely small, the transmission efficiency is high, the response is sensitive, and the positioning accuracy is far superior to that of ordinary lead screws. The movement is smooth and the rigidity is good. It can provide sufficient driving force and effectively suppress vibration, ensuring the stability of the fixture under heavy load or high-speed movement. It has both long service life and high reliability. The rolling friction method greatly reduces the wear of parts and ensures the accuracy retention of the entire drive system under long-term and frequent use. Specifically, the drive device 5 first precisely drives the array of positioning fixtures 3 to move towards the center. Then, the symmetrically arranged pneumatic device 2 is activated, and its pneumatic cylinder 21 pushes the shaping plate 22 forward. The suction device 41 on the other side of the base 1 sprays high-pressure airflow through the jet needle 42 during or after the entire processing. Through the sequential action of the drive pneumatic device 2 and the auxiliary cleaning of the suction device 41, the array of positioning fixtures 3, combined with strong pneumatic clamping, effectively resists processing vibration, ensures high-precision processing requirements, enhances functionality and reliability, and the multi-stage fixing effect extends the fixture life, making this fixture system particularly suitable for high-precision and high-efficiency modern steel structure processing scenarios.

[0018] In use, the drive device 5 drives the drive motor 51 to rotate the lead screw. The rotating lead screw drives the rotation of the thread 53. The rotation of the thread 53 drives the movement of the ball 52. The movement of the ball 52 pushes the movable cavity 31 of the positioning fixture 3, causing the positioning fixture 3 to move longitudinally along the lead screw and fix its posture along the sliding groove 11. When the positioning fixture 3 moves to the processing position, the sub-magnet 32 ​​above the positioning fixture 3 and the corresponding female magnet 12 on the base 1 magnetically repel each other, causing the spring-connected sub-magnet 32 ​​to clamp the workpiece. At the same time, the pneumatic cylinders 21 arranged in an array on the base 1 push the shaping plate 22 to lock the position of the workpiece and limit the pushing path of the shaping plate 22 by the limiting plate 23. After processing is completed, the pneumatic device 2 is controlled to retract the shaping plate 22. At this time, the drive motor 51 is driven in reverse to make the positioning fixture 3 displace relative to the base 1. Then the magnetic repulsion between the female magnet 12 and the sub-magnet 32 ​​disappears, and the sub-magnet 32 ​​retracts again to release the workpiece. After the workpiece is removed, the pump 41 drives the gas to be sprayed towards the base 1 through the air inlet pipe 43 and the jet needle 42.

[0019] The preferred embodiments of the present invention disclosed above are merely illustrative of the present invention. These preferred embodiments do not describe all details exhaustively, nor do they limit the present invention to the specific implementations described.

[0020] Obviously, many modifications and variations can be made based on the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this invention, thereby enabling those skilled in the art to better understand and utilize it. This invention is limited only by the claims and their full scope and equivalents.

Claims

1. A jig for processing a steel structure, comprising a base (1), characterized in that: Multiple pneumatic devices (2) are symmetrically arranged on the base (1). The pneumatic devices (2) are arranged facing the positioning fixture (3). The positioning fixture (3) is arranged in an array and a driving device (5) passes through its middle. A pressure-drawing structure is also provided on the other side of the base (1).

2. The clamp for processing a steel structure according to claim 1, characterized in that: The positioning fixture (3) has a movable cavity (31) inside. The movable cavity (31) cooperates with the driving device (5) to move the positioning fixture (3). The upper end of the positioning fixture (3) is provided with a sub-magnet (32). The sub-magnet (32) and the mother magnet (12) are magnetically repulsive.

3. The clamp for processing a steel structure according to claim 1, characterized in that: The pneumatic device (2) includes a pneumatic cylinder (21), and a shaping plate (22) is provided at the front end of the piston rod of the pneumatic cylinder (21), and a limiting plate (23) is provided on the front side of the shaping plate (22).

4. The clamp for processing a steel structure according to claim 1, characterized in that: The base (1) has a sliding groove (11) at the center of its edge. The sliding groove (11) cooperates with the positioning clamp (3). The base (1) also has a female magnet (12) at the position corresponding to the positioning clamp (3).

5. The clamp for processing a steel structure according to claim 1, characterized in that: The pressure-drawing structure includes a pressure-drawing device (41), one end of which is connected to an air inlet pipe (43), and the other end is connected to an air jet needle (42).

6. The clamp for processing a steel structure according to claim 1, wherein: The drive device (5) includes a drive motor (51), the output shaft of which is connected to a lead screw, and the surface of the lead screw is provided with threads (53) and balls (52).

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