Synchronous clamping mechanism for section steel and overturning positioning device

Abstract

The application discloses a section steel synchronous clamping mechanism and a turnover positioning device, and relates to the technical field of section steel welding. The section steel synchronous clamping mechanism comprises a clamping base, two clamping action members are oppositely and slidably arranged on the clamping base, a transmission screw rod is rotatably arranged on the clamping base, two screw rod transmission sections with opposite screw directions are arranged on the transmission screw rod, a transmission silk cover is arranged on each clamping action member and is screw-connected with the two screw rod transmission sections respectively, a sliding connection structure is arranged between the transmission silk cover and the corresponding clamping action member, a close action structure and a far action structure are fixedly arranged on the clamping action member and are located at the close action end and the far action end of the corresponding transmission silk cover respectively, an elastic action member is arranged between the transmission silk cover and the close action structure, and the transmission screw rod is connected with a clamping driver. The application reduces the workpiece clamping damage problem, and the clamping is stable and reliable.

Description

Technical Field

[0001] This invention relates to the field of steel welding technology, and in particular to a steel synchronous clamping mechanism and a flipping positioning device. Background Technology

[0002] For structural steel sections, such as H-beams, U-beams, and rectangular steel, the welding of accessories during processing requires a positioner for rotation and repositioning to automate the welding operations. Specifically, the positioner uses a rotation and positioning device to clamp the input structural steel section, then rotates it to a specified angle. After rotation, a replacement fixing device takes over clamping and fixing the structural steel section, and the rotation and positioning device returns to its original position, allowing accessory welding to begin. After accessory welding is completed in this position, the rotation and positioning device re-clamps the structural steel section, the replacement fixing device releases the clamp, and the rotation and positioning device rotates the structural steel section to the next required angle. The replacement fixing device then takes over clamping and fixing again, allowing for accessory welding in the next desired position. After all accessories are welded, the rotation and positioning device rotates the structural steel section to the specified position, and then the structural steel section is output.

[0003] Among them, the clamping mechanism used in the flipping positioning device, as shown in the invention patent with announcement number "CN114871649B", adopts a chain-driven form. When the chain is driven, the upward and downward sections run in opposite directions, causing the corresponding clamping bodies to move towards or away from each other to complete the clamping or releasing action. In addition, some clamping mechanisms adopt a screw drive form with positive and negative lead screws. When the lead screw is driven to rotate, the opposite lead screw drives on both sides can drive the two clamping bodies to move towards or away from each other to complete the clamping or releasing action. However, regardless of the structural form adopted, after clamping the steel, a rigid clamping is formed on the steel. Under a large driving force, the clamping body will produce obvious indentations on the surface of the steel, that is, the workpiece is damaged. To alleviate this problem, the current main approach is to control the clamping force. However, due to the dimensional errors of the steel profile and the precision of the clamping drive and transmission components, it is difficult to control the magnitude of the clamping force. Even a small error can cause the clamping body to shift from being close to the steel profile to almost leaving the steel surface, turning the originally strong clamping force into a very weak one. If a flipping action is performed under this weak clamping force, the steel profile may experience axial movement, which in turn affects the welding accuracy of the accessories. This process requires manual intervention to correct the position of the steel profile after displacement, resulting in low overall efficiency and numerous safety issues. Therefore, further improvements to the steel profile clamping method are needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a synchronous clamping mechanism and flipping positioning device for steel profiles that reduces the occurrence of workpiece clamping damage and provides stable and reliable clamping.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a synchronous clamping mechanism for structural steel, including a clamping base, on which two clamping members are slidably mounted relative to each other; a transmission screw is rotatably mounted on the clamping base, and the transmission screw has two screw transmission sections with opposite helical directions; each clamping member is respectively equipped with a transmission sleeve that is helically engaged with the two screw transmission sections; a sliding connection structure is provided between the transmission sleeve and the corresponding clamping member; a proximity action structure and a distance action structure are respectively fixedly provided on the clamping member at the proximity end and the distance from the corresponding transmission sleeve; an elastic action member is provided between the transmission sleeve and the proximity action structure; and a clamping driver is connected to the transmission screw.

[0006] As a preferred technical solution, the elastic element is pre-compressed and installed between the transmission sleeve and the proximity action structure.

[0007] As a preferred technical solution, the sliding connection structure includes a spline sleeve fixedly installed on the clamping member, the spline sleeve having an inner spline, and the outer circumferential surface of the transmission thread sleeve having an outer spline that mates with the inner spline.

[0008] As a preferred technical solution, a sleeve cover is fixedly installed on the clamping member on the side of the spline sleeve away from the near-acting structure. The sleeve cover is used for the far-acting end of the transmission thread sleeve to abut against, and the sleeve cover constitutes the far-acting structure.

[0009] As a preferred technical solution, at least two circumferentially arranged cover fixing bolts are provided between the cover and the clamping member. The cover fixing bolts pass through the spline sleeve and are threadedly connected to the clamping member. The spline sleeve is provided with bolt through holes corresponding to each of the cover fixing bolts. The bolt through holes are arc-shaped elongated holes along the circumferential direction of the transmission thread sleeve.

[0010] As a preferred technical solution, the elastic action element includes a plurality of disc springs located between the transmission wire sleeve and the proximity action structure.

[0011] As a preferred technical solution, an action guide sleeve is fitted around the near-acting end of the transmission thread sleeve. The inner wall of the action guide sleeve is provided with an inner step for the near-acting end of the transmission thread sleeve to abut against. The disc spring is fitted around the action guide sleeve, and the outer wall of the action guide sleeve is provided with an outer step for pressing the disc spring.

[0012] As a preferred technical solution, the transmission screw includes an intermediate connecting sleeve rotatably mounted on the clamping base and located between the two screw transmission sections. The intermediate connecting sleeve is fixedly connected to the proximal ends of the two screw transmission sections respectively, and the power end of the clamping driver is poweredly connected to the intermediate connecting sleeve.

[0013] The flipping and positioning device includes a flipping conveyor seat rotatably mounted on a frame. A conveying guide mechanism and a flipping driver are provided between the flipping conveyor seat and the frame. A clamping feed seat is movably mounted on the flipping conveyor seat along the direction of approaching or moving away from the steel profile. A feed driver is provided between the clamping feed seat and the flipping conveyor seat. The steel profile synchronous clamping mechanism is mounted on the clamping feed seat.

[0014] As a preferred technical solution, a support roller for supporting the profile is installed on the clamping feed seat, and a plurality of support wheel sets are installed on the side of the clamping feed seat away from the profile of the support roller. The support wheel sets are arranged sequentially along the axial direction of the support roller and are used to support the support roller.

[0015] By employing the above technical solution, when the clamping driver of the present invention drives the transmission screw to rotate forward, the screw transmission sections and the corresponding transmission sleeves engage in a helical fit, causing the two clamping members to approach each other until they clamp the steel profile and stop. After the clamping members contact the steel profile and completely stop moving, the transmission sleeves further compress the elastic member, causing it to undergo further elastic deformation. In this case, the clamping force of the two clamping members on the steel profile is provided by the further deformed elastic member, and the provided force is related to the magnitude of the further deformation of the elastic member. Therefore, regardless of errors in the drive or transmission structure or errors in the steel profile contour, even with further deformation of the elastic member, both clamping members will generate a clamping force on the steel profile. Furthermore, the range of variation of this clamping force is significantly reduced compared to the previously uncontrollable situation where small errors resulted in either high pressure due to close contact with the steel profile or low pressure due to separation from it. In other words, the clamping force can be maintained within a range near the designed clamping force, ensuring clamping stability and reliability. The elastic actuating element also forms a buffer structure between the clamping driver and the clamping actuating element, making it difficult for the driving action of the clamping driver to be directly transmitted to the steel profile, thus reducing the occurrence of high-pressure clamping and minimizing workpiece damage. Attached Figure Description

[0016] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

[0017] Figure 1This is a three-dimensional structural schematic diagram of the synchronous clamping mechanism for steel profiles according to an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional structural schematic diagram of the steel synchronous clamping mechanism according to an embodiment of the present invention;

[0019] Figure 3 yes Figure 2 Enlarged schematic diagram of structure I in the diagram;

[0020] Figure 4 yes Figure 3 Enlarged schematic diagram of the AA structure in the image;

[0021] Figure 5 yes Figure 3 The diagram shows the exploded structure at the clamping component.

[0022] Figure 6 yes Figure 2 Enlarged schematic diagram of the structure at point II;

[0023] Figure 7 yes Figure 6 Enlarged schematic diagram of the BB structure in the image;

[0024] Figure 8 yes Figure 2 A schematic diagram showing the state of the steel section after it has been clamped.

[0025] Figure 9 yes Figure 8 Enlarged schematic diagram of the structure at point III;

[0026] Figure 10 yes Figure 9 A diagram showing the state of the elastic element after it is fully compressed.

[0027] Figure 11 This is a three-dimensional structural diagram of the flipping positioning device according to an embodiment of the present invention;

[0028] Figure 12 yes Figure 11 A schematic diagram of the three-dimensional structure from another perspective;

[0029] Figure 13 This is a top view of the flipping positioning device according to an embodiment of the present invention.

[0030] In the diagram: 1-Frame; 11-Tilting conveyor seat; 12-Conveying guide mechanism; 13-Tilting driver; 14-Clamping feed seat; 15-Feed driver; 16-Support roller; 17-Support wheel set; 2-Steel synchronous clamping mechanism; 21-Clamping base; 3-Clamping action element; 31-Clamping seat; 32-Gripper; 33-Proximity action structure; 34-Distance action structure; 35-First ear; 4-Drive screw; 41-Screw drive section; 42-Intermediate connecting sleeve; 43-Clamping driver; 44-Diverter box; 5-Drive screw sleeve; 51-Sliding connection structure; 52-Spline sleeve; 53-Inner spline; 54-Outer spline; 55-Cover; 56-Cover fixing bolt; 57-Bolt through hole; 6-Action guide sleeve; 61-Action inner step; 62-Action outer step; 7-Elastic action element; 9-Steel profile. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0032] like Figure 1 and Figure 2 As shown, the steel section synchronous clamping mechanism 2 includes a clamping base 21. Two clamping members 3 are slidably mounted on the clamping base 21. A transmission screw 4 is rotatably mounted on the clamping base 21. The transmission screw 4 has two screw drive sections 41 with opposite helical directions. Each clamping member 3 is equipped with a transmission sleeve 5 that helically engages with the two screw drive sections 41. The transmission screw 4 is connected to a clamping driver 43. The clamping driver 43 drives the transmission screw 4 to rotate forward or backward, and the two clamping members 3 can move synchronously closer or farther away. After the two clamping members 3 move closer to each other, they ultimately clamp the steel section 9. Each clamping member 3 includes a clamping seat 31 slidably mounted on the clamping base 21, and a clamping claw 32 is fixedly mounted on the clamping seat 31. The above structural principle is easily understood by those skilled in the art based on existing technology and will not be elaborated further here.

[0033] like Figure 1 , Figure 2 and Figure 6As shown, the transmission screw 4 includes an intermediate connecting sleeve 42 rotatably mounted on the clamping base 21 and located between the two screw transmission sections 41. The intermediate connecting sleeve 42 is fixedly connected to the proximal ends of the two screw transmission sections 41 respectively, and the power end of the clamping driver 43 is poweredly connected to the intermediate connecting sleeve 42. That is, the transmission screw 4 in this embodiment is a structure assembled from the intermediate connecting sleeve 42 and the two screw transmission sections 41. It utilizes the intermediate connecting sleeve 42 to connect to the driving force provided by the clamping driver 43. At the same time, this structural form facilitates the installation of the two screw transmission sections 41 on the clamping base 21.

[0034] Based on this type of transmission screw 4, driving power is obtained from the middle. To avoid interference between the clamping actuator 43 and the movement of the clamping member 3, such as... Figure 1 and Figure 2 As shown, a transfer case 44 is mounted on the clamping base 21. The input shaft of the transfer case 44 is poweredly connected to the clamping driver 43. The intermediate connecting sleeve 42 also serves as the output shaft of the transfer case 44 and is rotatably mounted on the clamping base 21. The transfer case 44 is a transmission component with an internal multi-stage gear transmission, which realizes the power transmission between the input shaft and the output shaft, which are far apart in center. The structural principle of the transfer case 44 can be derived by those skilled in the art using conventional technical means, and will not be elaborated further here. Furthermore, the connection between the intermediate connecting sleeve 42 and the lead screw transmission section 41 can be achieved using at least one of a radial pin, radial connecting bolt, etc., without limitation. In this embodiment, only one is used. Figure 7 The radial pin shown is illustrated in the form of a radial fastening bolt.

[0035] Of course, the transmission screw 4 described in this embodiment can also be an integral structure made from a single rod shaft, and the clamping driver 43 can also be located at one end of the transmission screw 4 to form a power connection with it. These variations should all be within the scope of protection.

[0036] like Figure 3 As shown, a sliding connection structure 51 is provided between the transmission thread sleeve 5 and the corresponding clamping member 3, thereby enabling the transmission thread sleeve 5 to slide axially on the clamping member 3 but preventing circumferential rotation. Specifically, as... Figure 3 and Figure 5 As shown, the sliding connection structure 51 includes a spline sleeve 52 fixedly installed on the clamping member 3. The spline sleeve 52 is provided with an inner spline 53, and the outer peripheral surface of the transmission thread sleeve 5 is provided with an outer spline 54 that cooperates with the inner spline 53.

[0037] Furthermore, such as Figure 3 and Figure 5As shown, a cover 55 is fixedly installed on the clamping member 3 on the side of the spline sleeve 52 away from the proximity structure 33. At least two circumferentially arranged cover fixing bolts 56 are provided between the cover 55 and the clamping member 3. The cover fixing bolts 56 pass through the spline sleeve 52 and are threadedly connected to the clamping member 3. The spline sleeve 52 has bolt through holes 57 corresponding to each of the cover fixing bolts 56. The cover 55 and the spline sleeve 52 are integrally fixed to the clamping member 3 by bolt connection. Accordingly, the clamping member 3, more specifically, the clamping seat 31, is fixedly provided with a first ear 35 located at the transmission thread sleeve 5. The first ear 35 has a first through hole for the transmission thread sleeve 5 to pass through, and the cover fixing bolts 56 fix the cover 55 and the spline sleeve 52 to the first ear 35.

[0038] like Figures 1 to 3 As shown, the clamping member 3 is fixed with a proximity action structure 33 and a distance action structure 34 at the proximity end and distance end corresponding to the transmission sleeve 5, respectively. The proximity end refers to the end where the two transmission sleeves 5 can apply force to the clamping member 3 when they are close together; this is generally the end where the two transmission sleeves 5 are close together. Conversely, the distance end refers to the end where the two transmission sleeves 5 can apply force to the clamping member 3 when they are far apart; this is generally the end where the two transmission sleeves 5 are far apart. An elastic member 7 is provided between the transmission sleeve 5 and the proximity action structure 33. The elastic member 7 acts as a buffer structure between the clamping driver 43 and the clamping member 3, avoiding the influence of errors in the driving or transmission structure and the dimensional errors of the profile 9, providing a clamping force with a smaller variation range for clamping the profile 9, promoting clamping stability and reliability. This effect will be elaborated in detail later and will not be repeated here.

[0039] Preferably, such as Figure 3 As shown, the sleeve 55 is used to abut the remote end of the transmission sleeve 5, and the sleeve 55 constitutes the remote action structure 34. The elastic action member 7 includes a plurality of disc springs located between the transmission sleeve 5 and the proximity action structure 33; of course, compression springs or the like can also be used.

[0040] Preferably, such as Figure 3As shown, a guide sleeve 6 is fitted around the near-acting end of the transmission thread sleeve 5. The inner wall of the guide sleeve 6 has an inner step 61 for the near-acting end of the transmission thread sleeve 5 to abut against. The disc spring is fitted around the guide sleeve 6, and the outer wall of the guide sleeve 6 has an outer step 62 for pressing the disc spring. The guide sleeve 6 is positioned between the transmission thread sleeve 5 and the disc spring for force transmission, simplifying the structure of the transmission thread sleeve 5 and other workpieces, thereby simplifying part processing. Furthermore, in this structure, a second ear is fixedly provided on the clamping seat 31 of the clamping member 3 in this embodiment. The second ear has a sliding hole that mates with the near-acting end of the guide sleeve 6. The disc spring is fitted onto the guide sleeve 6 between the second ear and the outer step 62. This design further promotes the reliable generation of elastic force by the elastic member 7. The spring force of the disc spring acts on the second ear to exert a force on the clamping member 3, so the second ear is the proximity action structure 33.

[0041] Therefore, the specific working principle of this embodiment is as follows.

[0042] Under normal circumstances, such as Figure 2 As shown, the two clamping members 3 are in a separated state.

[0043] When the steel section 9 is located between the two clamping members 3 and needs to be clamped, the clamping driver 43 drives the transmission screw 4 to rotate forward. Under the screw drive of the screw transmission section 41 and the transmission sleeve 5, the two transmission sleeves 5 move synchronously towards each other, and drive the two clamping members 3 to move synchronously towards each other until the two clamping members 3 clamp the steel section 9. Figure 8 As shown.

[0044] The clamping driver 43 sets the distance by which it drives the transmission sleeve 5 to move based on the screw parameters and the outline dimensions of the steel profile 9. This distance is determined by the further deformation of the elastic member 7 after clamping. Figure 9 As shown, in this embodiment, the disc spring undergoes further compression deformation. Therefore, the clamping member 3's movement from the initial opposing movement to the clamping of the steel profile 9 is divided into three stages. The first stage is the clamping member 3 moving towards each other but not yet contacting the steel profile 9. The second stage is as follows... Figure 3 As shown, this is the point in time when the clamping member 3 just contacts the steel section 9. At this point, the clamping member 3 no longer moves under the rigid constraint of the steel section 9, and correspondingly, the proximity structure 33 on it no longer moves. The third stage is as follows: Figure 9As shown, the transmission sleeve 5 continues to move in opposite directions. Based on the rigid constraint of the proximity action structure 33, the elastic action member 7 will be further compressed. Thus, after the transmission sleeve 5 stops, the elastic action member 7 provides the clamping force of the two clamping action members 3 clamping the steel 9 through the transmission of the proximity action structure 33.

[0045] The force provided by the elastic member 7 is related to its deformation after further compression, and it is known to be linearly related to the deformation; that is, the greater the deformation, the greater the force provided by the elastic member 7, and the smaller the deformation, the smaller the force provided. This force fluctuates within the deformable range of the elastic member 7. Therefore, as long as the driving and transmission errors and the accumulation of the profile error of the steel section 9 are within the deformable range of the elastic member 7, the clamping force is entirely provided by the elastic force of the elastic member 7. The driving force of the clamping actuator 43 will not be transmitted to the clamping member 3. Thus, its strong force will not cause the clamping member 3 to excessively press against the surface of the steel section 9, reducing the occurrence of workpiece damage. Furthermore, the adaptability of the deformable range of the elastic member 7 to error accumulation allows the clamping force at the clamping member 3 to vary within a smaller range. Compared to the uncontrollable situation in the prior art where small error changes result in either high pressure close to the steel section 9 or low pressure away from it, this ensures a more stable and reliable clamping force on the steel section 9 after clamping.

[0046] Preferably, under normal conditions, the elastic element 7 is pre-compressed and installed between the transmission sleeve 5 and the proximity action structure 33. This allows for a more effective clamping force when the transmission sleeve 5 moves to a stop. The clamping force is within a range that is greater than the pre-compression elastic force and less than the elastic force when the elastic element 7 is fully compressed. In other words, the generated clamping force is within a range with a larger force value and a smaller range, which can further promote the stability and reliability of clamping.

[0047] When the elastic member 7 is pre-compressed, under no external force, such as Figure 3 As shown, the pre-compression force of the elastic member 7 will cause the remote action structure 34 to abut against the remote action end of the transmission sleeve 5, so that when the transmission sleeve 5 moves, it will more effectively drive the clamping member 3 to move synchronously.

[0048] Preferably, such as Figures 3 to 5As shown, the bolt through hole 57 on the spline sleeve 52 is an arc-shaped elongated hole along the circumference of the transmission thread sleeve 5. This arc-shaped elongated hole design provides ample space for the circumferential rotation of the spline sleeve 52 relative to the cover fixing bolt 56, and also ensures structural safety in special cases where large cumulative errors may occur. Specifically, as... Figure 10 As shown, if the elastic element 7 is fully compressed during the clamping process but the transmission sleeve 5 has not yet reached the stop position, the clamping driver 43 will still drive the transmission screw 4 to rotate a certain angle. However, at this time, the transmission sleeve 5 is limited by the fully compressed elastic element 7. Therefore, after the strong driving force of the clamping driver 43 acts on the screw drive and other structures, it may cause problems such as overload damage to the clamping driver 43, damage to the connection structure between the intermediate connecting sleeve 42 and the screw drive section 41, deformation and damage to the screw drive structure, or damage to the spline structure between the transmission sleeve 5 and the spline sleeve 52. The arc-shaped long hole design of the bolt through hole 57, or the extra space between the bolt through hole 57 and the cover fixing bolt 56, allows the transmission sleeve 5 and the spline sleeve 52 in the screw drive to rotate a certain angle with the transmission screw 4 due to the clamping driving force overcoming the static friction after the spline sleeve 52 is fixedly installed. This avoids the above-mentioned damage to the components and forms a safety measure for the component structure.

[0049] When it is necessary to release the clamp, the clamping driver 43 drives the transmission screw 4 to reverse. The two transmission sleeves 5 first release the further pressure on the elastic action member 7, and then their far-acting ends abut against the far-acting structure 34 on the corresponding side. The two clamping action members 3 move away from each other, thus achieving the purpose of releasing the clamp.

[0050] like Figures 11 to 13 As shown, this embodiment also provides a flipping positioning device, including a flipping conveyor seat 11 rotatably mounted on a frame 1. A conveying guide mechanism 12 and a flipping driver 13 are provided between the flipping conveyor seat 11 and the frame 1. A clamping feed seat 14 is movably mounted on the flipping conveyor seat 11 along the direction close to or away from the profile 9. A feed driver 15 is provided between the clamping feed seat 14 and the flipping conveyor seat 11. The profile synchronous clamping mechanism 2 is mounted on the clamping feed seat 14. Thus, the clamping feed seat 14 can also serve as the clamping base 21.

[0051] During operation, after the steel profile 9 is in place, the feed driver 15 drives the clamping feed seat 14 to move towards the steel profile 9, so that the two clamping action members 3 are located on both sides of the steel profile 9. Then, the steel profile synchronous clamping mechanism 2 clamps the steel profile 9, and the flip driver 13 drives the flip conveyor seat 11 to rotate and convey it. After rotating by a specified angle, such as 90°, other devices take over fixing the steel profile 9, the steel profile synchronous clamping mechanism 2 releases the clamp, the feed driver 15 drives the clamping feed seat 14 to move away from the steel profile 9, and the flip driver 13 drives the flip conveyor seat 11 to return to its original position. When flipping is needed again, the above actions are repeated.

[0052] The structural principle of the flipping positioning device is a well-known technology in the field and will not be elaborated here. Furthermore, the transmission seat can be a single-level or two-level transmission, and there is no limitation here.

[0053] Preferably, such as Figure 1 , Figure 8 and Figure 13 As shown, the clamping feed seat 14 is equipped with a support roller 16 for supporting the profile 9. When the profile 9 is initially input to the positioner, it is input under the rolling support of the support roller 16, which reduces the impact of input resistance on positioning accuracy. Several support wheel sets 17 are installed on the side of the clamping feed seat 14 away from the profile 9, and these support wheel sets 17 are arranged sequentially along the axial direction of the support roller 16 to support it. Using the support wheel sets 17 to provide multi-point support for the support roller 16 of a certain length ensures the support strength of the support roller 16, facilitating long-term support of the profile 9.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A synchronous clamping mechanism for structural steel, comprising a clamping base, wherein two clamping members are slidably mounted on the clamping base, characterized in that: A transmission screw is rotatably mounted on the clamping base. The transmission screw has two screw transmission sections with opposite helical directions. Each clamping member is respectively equipped with a transmission sleeve that is helically engaged with the two screw transmission sections. A sliding connection structure is provided between the transmission sleeve and the corresponding clamping member. The clamping member is fixedly provided with a proximity structure and a distance structure at the proximity end and distance end of the corresponding transmission sleeve, respectively. An elastic member is provided between the transmission sleeve and the proximity structure. The transmission screw is connected to a clamping driver; The sliding connection structure includes a spline sleeve fixedly installed on the clamping member. The spline sleeve has an internal spline, and the outer circumferential surface of the transmission thread sleeve has an external spline that mates with the internal spline. A cover is fixedly installed on the clamping member on the side of the spline sleeve away from the near-acting structure. The cover is used for the far-acting end of the transmission thread sleeve to abut against, and the cover constitutes the far-acting structure. At least two circumferentially arranged cover fixing bolts are provided between the cover and the clamping member. The cover fixing bolts pass through the spline sleeve and are threadedly connected to the clamping member. The spline sleeve has bolt through holes corresponding to each of the cover fixing bolts. The bolt through holes are arc-shaped elongated holes along the circumferential direction of the transmission thread sleeve.

2. The steel section synchronous clamping mechanism as described in claim 1, characterized in that: The elastic actuating element is pre-compressed and installed between the transmission sleeve and the proximity actuating structure.

3. The steel section synchronous clamping mechanism as described in claim 1, characterized in that: The elastic actuating element includes a plurality of disc springs located between the transmission sleeve and the proximity actuating structure.

4. The steel section synchronous clamping mechanism as described in claim 3, characterized in that: An action guide sleeve is fitted around the near-acting end of the transmission thread sleeve. An inner step is provided on the inner wall of the action guide sleeve for the near-acting end of the transmission thread sleeve to abut against. The disc spring is fitted around the action guide sleeve, and an outer step is provided on the outer wall of the action guide sleeve for pressing the disc spring.

5. The steel section synchronous clamping mechanism as described in claim 1, characterized in that: The transmission screw includes an intermediate connecting sleeve rotatably mounted on the clamping base and located between the two screw transmission sections. The intermediate connecting sleeve is fixedly connected to the proximal ends of the two screw transmission sections respectively, and the power end of the clamping driver is poweredly connected to the intermediate connecting sleeve.

6. A flipping and positioning device, comprising a flipping conveyor seat rotatably mounted on a frame, wherein a conveying guide mechanism and a flipping driver are provided between the flipping conveyor seat and the frame, and a clamping feed seat is movably mounted on the flipping conveyor seat along the direction approaching or away from the profile steel, and a feed driver is provided between the clamping feed seat and the flipping conveyor seat, characterized in that: The clamping feed seat is equipped with a steel section synchronous clamping mechanism as described in any one of claims 1 to 5.

7. The flipping positioning device as described in claim 6, characterized in that: The clamping feed seat is equipped with a support roller for supporting the steel section. Several support wheel sets are installed on the side of the clamping feed seat away from the steel section from the support roller. The support wheel sets are arranged sequentially along the axial direction of the support roller and are used to support the support roller.

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