A large-size beam type precision part straightening device

Abstract

The present application relates to the field of beam class correction, and specifically relates to a large-size beam class precision part correction device, which comprises a correction table and a correction frame. The present application realizes three-face clamping positioning by extending the lower pressing seat into the opening of the C-shaped beam, and by matching the correction plate one to abut the inner wall. The workpiece pressing makes the air guide hole self-adapting opening, only supplies air heating to the effective correction area, and reduces heat loss. After the workpiece reaches the plastic temperature, each clamping component synchronously applies pressure, corrects the 90-degree angle of the C-shaped beam, the flatness of the web, and the vertical deformation. After correction, the restraint is maintained, the sealing plate is shifted to switch cold and hot air to realize step cooling, avoid residual stress, springback and hardening embrittlement problems caused by sudden cooling, and the restraint is released after the temperature drops to a safe temperature. No offline sizing die is needed, the cooling cycle is shortened, and the tooling cost is reduced. The lifting bearing table cooperates with the original clamping and air path system, and is compatible with H-shaped beam correction. One set of equipment adapts to two types of components, improves the universality, and reduces the equipment investment.

Description

Technical Field

[0001] This invention relates to the field of beam alignment, and more specifically to an alignment device for large-size precision beam components. Background Technology

[0002] With the widespread application of steel structures in construction engineering, heavy equipment, and engineering machinery, large-size U-beams, H-beams, and box beams, as core load-bearing and supporting components, directly determine the subsequent assembly accuracy and structural load-bearing reliability due to the accuracy of their cross-sectional angles, overall straightness, and plate flatness. Affected by multiple factors such as residual stress, external extrusion, and processing springback, cross-sectional angle deformation is common. It is necessary to correct it to the design tolerance range through a straightening process before it can be put into subsequent assembly and use.

[0003] In patent application CN211100896U, published on July 28, 2020, entitled "Workpiece Correction Mechanism for Box Girder U-Shaped Assembly Equipment," this application discloses a workpiece correction mechanism for box girder U-shaped assembly equipment. The mechanism includes a receiving frame, a first lifting mechanism connected to a lower pressing component, a second lifting mechanism connected to a top component, and two third lifting mechanisms (left and right) connected to left and right correction frames respectively. Each of the left and right correction frames has a transverse drive mechanism, the output of which is connected to a powerful magnet. This invention can achieve the correction of the U-shape of a box girder.

[0004] Large-size steel beams can be classified by cross-section into U-beams, H-beams, box beams, etc., and their straightening processes are mainly divided into two categories: cold straightening and hot straightening. Hot straightening is mostly used for components with high rigidity and high precision requirements. It typically involves preheating or simultaneous heating with restraint to bring the component to its plastic temperature, followed by mechanical pressure to correct deformation. To suppress cooling springback and ensure straightening accuracy, precision hot straightening often uses specialized molds to clamp and restrain the component at high temperatures, then allows it to air-cool to room temperature before demolding.

[0005] However, this process has limitations for large-size low-alloy beams subjected to heavy loads. To avoid the hardening of the structure, the surge in residual stress, and the springback caused by rapid cooling at high temperatures, forced cooling cannot be used to accelerate the cooling process. Natural air cooling has a long cooling cycle, and the shaping mold takes a long time to complete, resulting in low processing efficiency per machine. At the same time, beams with different cross-sections require matching shaping molds of corresponding specifications, resulting in large tooling investment and poor versatility, which further increases the shaping cost of large-size beams.

[0006] Therefore, it is necessary to invent a large-size beam-type precision component alignment device to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a large-size beam precision component straightening device. By setting air guide holes on the straightening seat that can adaptively open and close with the workpiece contact, and cooperating with the sliding of the sealing plate in the sealing frame to achieve smooth switching between hot and cold air, the device utilizes the lower pressure seat, straightening plate, and liftable support platform to form a multi-component adaptive rigid restraint clamping structure. This keeps the workpiece restrained and completes stepped gradient cooling throughout the straightening process, thereby solving the problems of existing technologies that require offline shaping molds for natural cooling, resulting in long processing cycles and low efficiency for large-size beam thermal straightening.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a large-size beam-type precision part straightening device, including a straightening table and a straightening frame, wherein the straightening frame is installed above the straightening table, and a lower pressure seat is installed below the straightening table by means of a hydraulic cylinder moving up and down. It also includes straightening seats that are symmetrically installed above the straightening table by means of a hydraulic cylinder sliding laterally. Both straightening seats have air chambers inside, and multiple air guide holes are distributed in a rectangular array on the lower part of the inner wall of the air chamber near the side of the workpiece beam, and each air guide hole can be connected / closed. Two calibrating seats are symmetrically equipped with sealing frames on the side away from the workpiece beam. The interior of each sealing frame and the calibrating seat cooperate to form two air chambers with equal upper and lower dimensions. A connecting groove is opened between the middle of each air chamber and the air cavity. Each sealing frame has two interconnected sealing plates that slide vertically within its two air chambers, and either sealing plate can be driven vertically by an electric actuator. Both sealing plates are located at the top of the air chamber and are attached to one side of the calibration seat.

[0009] As a preferred embodiment of the present invention, the outer surfaces of the two alignment seats near the workpiece beam are provided with a plurality of guide grooves in a crisscross pattern, and the air guide holes are located at the cross-shaped positions of each guide groove.

[0010] As a preferred embodiment of the present invention, the edge of each of the guide grooves facing the workpiece beam is rounded.

[0011] As a preferred embodiment of the present invention, a limiting bracket is installed inside the air guide hole, and a valve stem is slidably connected inside the limiting bracket. A return spring is sleeved on the valve stem, and the return spring is located in the middle of the valve stem.

[0012] As a preferred embodiment of the present invention, each of the air guide holes is provided with a sealed cylinder that communicates with the inside of the air guide hole on the side near the inner wall of the air chamber. The sealed cylinder is provided through the valve stem, and the sealing end of one end of the valve stem can be in contact with or away from the inner wall of the sealed cylinder. The other end of the valve stem extends beyond the flow groove.

[0013] As a preferred embodiment of the present invention, each of the sealing frames is symmetrically equipped with an air inlet pipe on one side, and the two air inlet pipes are respectively connected to the upper and lower air chambers inside the sealing frame. Furthermore, the upper air intake pipe is connected to the external cold air supply pipe; the lower air intake pipe is connected to the external hot air supply pipe.

[0014] As a preferred embodiment of the present invention, each of the sealing plates has a second connecting groove on its surface, and the second connecting grooves of the upper sealing plate and the lower sealing plate are far apart from each other; Furthermore, the dimensions of connecting slot 2 and connecting slot 1 are equal.

[0015] As a preferred embodiment of the present invention, the lower pressure seat is symmetrically provided with a first adjusting plate that can be moved laterally by a hydraulic rod on both sides, and the length of the first adjusting plate is equal to that of the lower pressure seat; Furthermore, the two alignment plates move in opposite directions.

[0016] As a preferred embodiment of the present invention, a hidden groove is provided on the upper surface of the straightening platform, and a support platform that can be moved up and down by a hydraulic cylinder is provided in the hidden groove; Furthermore, the upper surface of the bearing platform is flush with the upper surface of the calibration platform.

[0017] As a preferred embodiment of the present invention, the support platform is provided with two straightening plates that can be moved laterally by hydraulic rods on both sides, and the length of the straightening plates is equal to that of the straightening platform; Furthermore, the two alignment plates move in opposite directions.

[0018] Compared with the prior art, the technical effects and advantages provided by the present invention in the above technical solution are as follows: The lower pressure seat extends into the opening of the C-shaped beam, while the two side alignment seats simultaneously move closer to fit against the outer wall of the C-shaped beam. The alignment plates extending from both sides of the lower pressure seat abut against the inner wall of the C-shaped beam, achieving initial three-sided clamping and positioning of the component. During clamping, the air vents pressed against by the workpiece automatically open, while the non-contact areas remain closed, supplying air heating only to the effective alignment area to reduce heat loss. After the workpiece is heated to its plastic temperature, the lower pressure seat, alignment seats, and alignment plates simultaneously apply pressure gradually, correcting the angle between the two flanges and the web of the C-shaped beam to 90°, while simultaneously correcting the flatness of the web and overall vertical deformation. After alignment, the clamping restraint is maintained, and the hot and cold air paths are gradually switched by the slow sliding of the sealing plate, causing the airflow temperature acting on the workpiece to decrease in a stepwise manner, avoiding a surge in residual stress, correction springback, and material hardening and embrittlement caused by sudden cooling. Once the workpiece has cooled to a safe temperature, the restraint can be released, and it can be removed and allowed to cool naturally to room temperature. This solution shortens the cooling cycle and improves processing efficiency while ensuring the accuracy of the forming process. It also eliminates the need for additional offline turnover forming molds, thus reducing the tooling cost of batch forming. The liftable support platform, combined with the upper pressure seat and two side alignment seats, enables the alignment of H-beams. By placing the H-beam vertically, the support platform rises and extends into the grooves of the lower flange and web, while the pressure seat presses down and extends into the upper groove. The two side alignment seats simultaneously clamp the outer wall of the flange. Using the same airflow heating and gradient cooling system, the verticality of the H-beam flange and the flatness of the web can be corrected. This design allows a single device to simultaneously adapt to the alignment needs of both C-beams and H-beams, significantly improving the device's versatility and adaptability to various scenarios, and reducing the equipment investment cost for multiple types of components. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the combined structure of the support platform and the alignment plate of the present invention; Figure 3 This is a schematic diagram of the mating structure of the lower pressure seat and the straightening plate of the present invention; Figure 4 This is a schematic diagram of the unfolded structure of the alignment plate of the present invention; Figure 5 This is a schematic diagram of the alignment seat layout structure of the present invention; Figure 6 This is a schematic diagram of a partial planed structure of the alignment seat of the present invention; Figure 7 This is a schematic diagram of the planar cutting plane of the alignment seat of the present invention; Figure 8 This is a schematic diagram of the planed structure of the sealing frame of the present invention; Figure 9 This is a schematic diagram of the mating structure of the calibration platform and the support platform of the present invention; Figure 10 This is a schematic diagram of the C-beam straightening structure of the present invention; Figure 11 This is a schematic diagram of the H-beam straightening structure of the present invention; Figure 12 For the present invention Figure 7 Enlarged structural diagram at point A in the middle.

[0021] Explanation of reference numerals in the attached figures: Correction table; 101. Correction frame; 102. Lower pressure seat; 201. Air chamber; 202. Air guide hole; 203. Sealing frame; 204. Connecting groove one; 205. Sealing plate; 206. Flow guide groove; 207. Limiting bracket; 208. Valve rod; 209. Return spring; 210. Sealing cylinder; 211. Inlet pipe; 212. Connecting groove two; 300. Alignment plate one; 301. Hidden groove; 302. Support platform; 303. Alignment plate two. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] This invention provides a large-size beam-type precision component straightening device, including a straightening table 100 and a straightening frame 101. The straightening frame 101 is installed above the straightening table 100, and a lower pressure seat 102 is installed below the straightening table 100 by a hydraulic cylinder that moves up and down. The invention is characterized by further including straightening seats 200 that are symmetrically installed above the straightening table 100 by a hydraulic cylinder that slides laterally. Both straightening seats 200 have air chambers 201 inside. Multiple air guide holes 202 are distributed in a rectangular array on the lower part of the inner wall of the air chamber 201 near the workpiece beam side, and each air guide hole 202 can be connected or closed. like Figure 1 , 6 As shown in Figures 10, 11, and 12, during the shaping process, the C-shaped beam is placed above the shaping table 100 with the opening of the C-shaped beam facing the same direction. The hydraulic cylinder pushes the lower pressure seat 102 downward to fit into the inside of the C-shaped beam, while the shaping seat 200 moves to fit into both sides of the outside of the C-shaped beam, forming a preliminary fit. At this time, hot air enters the air chamber 201 and acts on both sides of the C-shaped beam through the air guide hole 202 to heat both sides of the C-shaped beam. Finally, the lower pressure seat 102 and the shaping seat 200 move and fit together further to complete the plastic shaping of the C-shaped beam, thereby shaping the 90-degree angle of the C-shaped beam. The air vent 202 can be opened or closed according to the side dimensions of the C-beam. During the initial fitting process of the shaping seat 200, it can be opened adaptively by pressing against the side of the C-beam. At the same time, the air vent 202 can be automatically closed after the shaping seat 200 is reset.

[0024] Two alignment seats 200 are symmetrically equipped with sealing frames 203 on the side away from the workpiece beam. The interior of each sealing frame 203 and the alignment seat 200 cooperate to form two air chambers with equal upper and lower dimensions. A connecting groove 204 is opened between the middle of each air chamber and the air cavity 201. like Figure 6-8As shown, through the two independent air chambers inside the sealing frame 203, hot air and cold air from the outside can be supplied to the corresponding air chambers independently, and through the connecting groove 204, hot air and cold air can enter the air chamber 201 respectively, thereby realizing the heating and cooling of the C-shaped beam.

[0025] Each of the two air chambers of the sealing frame 203 has two interconnected sealing plates 205 that slide up and down, and either sealing plate 205 can be driven up and down by an electric push rod. Both sealing plates 205 are located at the top of the air chamber and are attached to one side of the calibration seat 200.

[0026] like Figure 6-8 As shown, by sliding a single sealing plate 205 up and down inside the sealing frame 203, another set of sealing plates 205 moves synchronously, thereby enabling the two sets of sealing plates 205 to open or close the connecting grooves 204 inside each air chamber, thus achieving the switching adjustment of cold or hot air. The sliding speed of the sealing plates 205 can be controlled and adjusted according to the working conditions. When the two sealing plates 205 are located at the upper part of the air chamber, the connecting groove 204 of the lower air chamber is in a connected state, while the connecting groove 204 of the upper air chamber is in a closed state.

[0027] Furthermore, in the above structure, the outer surface of the two alignment seats 200 near the workpiece beam is provided with a plurality of guide grooves 206 in a crisscross pattern, and the air guide holes 202 are located at the cross-shaped positions of each guide groove 206.

[0028] like Figure 6 and 12 As shown, during the air guiding process of the air guide hole 202, the layout of the guide groove 206 allows hot or cold air to flow inside it. The layout of the guide groove 206 can form small areas on the side of the C-shaped beam. At this time, the gas flow inside the guide groove 206 can further improve the heating or heat dissipation effect.

[0029] Furthermore, in the above structure, the edges of the grooves of each guide groove 206 facing the workpiece beam are rounded.

[0030] like Figure 12 As shown, during the calibration process, the rounded corners of the guide groove 206 are used to prevent damage to the surface of the calibration seat 200 after it comes into contact with the C-shaped beam during calibration, compared to the traditional right-angle groove.

[0031] Furthermore, in the above structure, a limit bracket 207 is installed inside the air guide hole 202, and a valve stem 208 is slidably connected inside the limit bracket 207. A return spring 209 is sleeved on the valve stem 208, and the return spring 209 is located in the middle of the valve stem 208.

[0032] like Figure 12 As shown, the valve stem 208 is guided by the limit bracket 207, while one end of the return spring 209 is in contact with the surface of the valve stem 208 and the other end is in contact with the limit bracket 207. This ensures that the valve stem 208 can always move to one side of the guide groove 206, thus ensuring the sealing of the air guide hole 202.

[0033] Furthermore, in the above structure, each air guide hole 202 is equipped with a sealed cylinder 210 that communicates with the inside of the air guide hole 202 on the side near the inner wall of the air chamber 201. The sealed cylinder 210 is connected through the valve stem 208, and the sealing end of one end of the valve stem 208 can be in contact with or away from the inner wall of the sealed cylinder 210. The other end of the valve stem 208 extends out of the flow groove.

[0034] like Figure 12 As shown, the sealing end of the valve stem 208 is in contact with the sealing cylinder 210, thereby achieving overall sealing of the air chamber 201. As the adjusting seat 200 moves towards the side of the C-shaped beam, the other end of the valve stem 208 contacts the side of the C-shaped beam and is squeezed, thereby moving one end of the valve stem 208 into the air guide hole 202 and squeezing the return spring 209. At the same time, the sealing cylinder 210 disengages from the sealing end of the valve stem 208, connecting the air chamber 201 with the air guide hole 202 for air supply. Meanwhile, the air guide hole 202, which is not in contact with the side of the C-shaped beam, is in a stationary state, achieving adaptive gas supply. When the adjusting seat 200 is reset, the valve stem 208 and the sealing cylinder 210 can be re-sealed under the action of the return spring 209.

[0035] Furthermore, in the above structure, each sealing frame 203 is symmetrically equipped with an air inlet pipe 211 on one side, and the two air inlet pipes 211 are respectively connected to the upper and lower air chambers inside the sealing frame 203. Furthermore, the upper air intake pipe 211 is connected to the external cold air supply pipe; the lower air intake pipe 211 is connected to the external hot air supply pipe.

[0036] like Figure 6-8 As shown, when heating is required, hot air enters through the lower air inlet pipe 211 and enters the lower air chamber inside the sealing frame 203. When cooling is required, cold air enters through the upper air inlet pipe 211 and enters the upper air chamber inside the sealing frame 203.

[0037] Furthermore, in the above structure, each sealing plate 205 has a connecting groove 212 on its surface, and the connecting grooves 212 of the upper sealing plate 205 and the lower sealing plate 205 are far apart from each other. Furthermore, the dimensions of the second connecting groove 212 and the first connecting groove 204 are equal.

[0038] like Figure 6-8 As shown, when the second connecting groove 212 on the surface of the sealing plate 205 coincides with the first connecting groove 204, the interior of the air chamber is connected to the air cavity 201. When heating, the two sealing plates 205 are at the uppermost position, and the second connecting groove 212 on the surface of the lower sealing plate 205 coincides with the first connecting groove 204, allowing hot air from the lower air chamber to enter the air cavity 201. When cooling is required, the two sealing plates 205 move downwards, misaligning the second connecting groove 212 and the first connecting groove 204 below, while the second connecting groove 212 and the first connecting groove 204 in the upper air chamber coincide, allowing cold air to enter the air cavity 201. As the cold air moves downwards, it accelerates the reduction of the temperature inside the air cavity 201. During the cooling process, the lower pressure seat 102 and the two side straightening seats 200 are in a state of fixing the C-shaped beam to prevent straightening rebound. Meanwhile, the moving speed of the two sealing plates 205 can be adjusted to gradually achieve the misalignment or overlap between the corresponding connecting grooves 212 and 204, thereby keeping the temperature in a gradually decreasing state and avoiding sudden cooling, which would cause the C-shaped beam to spring back after the plastic shaping is released from the limit.

[0039] Furthermore, in the above structure, the lower pressure seat 102 is symmetrically embedded with a straightening plate 300 that can be moved laterally by a hydraulic rod on both sides, and the length of the straightening plate 300 is equal to that of the lower pressure seat 102. Furthermore, the two alignment plates move in opposite directions.

[0040] like Figure 3 , 4 As shown in Figure 10, during the straightening process, when the pressing seat 102 moves and fits into the interior of the C-shaped beam, the straightening plate 300 can unfold to both sides under the action of the hydraulic rod, thus fitting into the inner wall of the C-shaped beam. In conjunction with the straightening seats 200 on both sides, it ensures that the two sides of the C-shaped beam are straightened to a 90-degree position. The pushing of the straightening seat 200 can correct the outward deformation of the C-shaped beam, and the pushing of the straightening plate 300 outward can correct the inward deformation of the C-shaped beam.

[0041] Furthermore, in the above structure, a hidden groove 301 is provided on the upper surface of the straightening table 100, and a support table 302 that can be moved up and down by a hydraulic cylinder is provided in the hidden groove 301. Furthermore, the upper surface of the bearing platform 302 is flush with the upper surface of the straightening platform 100.

[0042] like Figure 9As shown, the hydraulic cylinder can push the support platform 302 upward from the hidden groove 301, and at the same time, the upper surface of the support platform 302 is flush with the upper surface of the straightening platform 100, which can ensure the stability of the C-shaped beam during placement.

[0043] Furthermore, in the above structure, the support platform 302 is provided with a second type of straightening plate 303 that can be moved laterally by a hydraulic rod on both sides. The length of the second type of straightening plate 303 is equal to that of the straightening platform 100. Furthermore, the two alignment plates move in opposite directions.

[0044] like Figure 11 As shown, when processing and straightening the H-beam, one side of the opening of the H-beam faces the bearing platform 302, and the other side faces the lower pressure seat 102. When the bearing platform 302 is pushed upward from the hidden groove 301, the bearing platform 302 can fit into the lower opening of the H-beam, and the lower pressure seat 102 above can fit into the upper opening of the H-beam. At this time, the straightening seats 200 on both sides can move to both sides of the H-beam, thereby realizing the straightening of the H-beam.

[0045] like Figure 1-12 As shown, when using this device, the C-shaped beam with its opening facing upward is placed on the straightening table 100, and the lower pressing seat 102 is pressed against the opening of the C-shaped beam by the hydraulic cylinder. At the same time, the straightening seats 200 on both sides move closer to the sides of the C-shaped beam and are pressed against each other under the drive of the hydraulic cylinder. During the closing process of the alignment seat 200, the end of the valve stem 208 facing the side of the C-shaped beam will come into contact with its side and be squeezed, thereby causing the valve stem 208 to move into the air guide hole 202 and causing the sealing end of the valve stem 208 to separate from the sealing cylinder 210, thereby connecting the inside of the air chamber 201 with the guide groove 206, thus completing the initial fitting. At this point, the two sealing plates 205 inside the sealing frame 203 need to be adjusted to the uppermost position to ensure that the connecting groove 212 on the surface of the lower sealing plate 205 coincides with the sealing frame 203, while the connecting groove 212 on the upper side is misaligned with the sealing frame 203. Hot air is then introduced so that it enters the lower air chamber through the air inlet pipe 211 and enters the air cavity 201. It then acts on the side of the C-shaped beam through the guide hole to heat it. As the heating continues, it enters a plastic state. At this time, the shaping seat 200 will continue to move and move closer to further contact the side of the C-shaped beam. At the same time, the lower pressure seat 102 moves synchronously, and the shaping plates 300 on both sides of the lower pressure seat 102 are attached to the inner surface of the C-shaped beam under the drive of the hydraulic rod, thereby ensuring that the side of the C-shaped beam is corrected to a 90-degree state when heated, thus completing the overall shaping operation. After the alignment is completed, the alignment seat 200, the lower pressure seat 102, and the alignment plate 300 remain in their positions to ensure the plastic shaping of the C-beam. Meanwhile, the sealing plate 205 moves downwards gradually under the action of the electric push rod, so that the upper connecting groove 212 gradually overlaps with the sealing frame 203, and the lower connecting groove 212 gradually misaligns with the sealing frame 203, thereby gradually reducing the temperature and achieving a stepped cooling. When the temperature drops to a suitable level, the C-beam can be removed to allow it to cool down naturally. When H-beam correction is required, the lower opening of the H-beam should face the bearing platform 302, while the upper opening of the H-beam should face the lower pressure seat 102. At this time, the bearing platform 302 moves upward to fit inside the lower opening of the H-beam, while the upper lower pressure seat 102 presses down to fit inside the upper opening of the H-beam. The correction seat 200 fits inside both sides of the H-beam, and the first correction plate 300 and the second correction plate 303 simultaneously fit inside the upper and lower sides of the H-beam. The heating and cooling steps described above are repeated to complete the correction operation of the entire H-beam.

[0046] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A calibration device for large-size beam-type precision parts, comprising a calibration table (100) and a calibration frame (101), wherein the calibration frame (101) is mounted above the calibration table (100), and a lower pressure seat (102) is mounted below the calibration table (100) via a hydraulic cylinder, characterized in that: It also includes a straightening seat (200) that is symmetrically installed above the straightening table (100) by a hydraulic cylinder. Both straightening seats (200) have an air chamber (201) inside. The lower rectangular array of the inner wall of the air chamber (201) near the workpiece beam has multiple air guide holes (202) distributed in a row. Each air guide hole (202) can be connected or closed. Two alignment seats (200) are symmetrically equipped with sealing frames (203) on the side away from the workpiece beam. The interior of each sealing frame (203) and the alignment seat (200) cooperate to form two equal upper and lower air chambers. A connecting groove (204) is opened between the middle of each air chamber and the air cavity (201). Each sealing frame (203) has two interconnected sealing plates (205) that slide vertically in each of its two air chambers. Either sealing plate (205) can be driven vertically by an electric actuator. Both sealing plates (205) are located at the top of the air chamber and are attached to one side of the alignment seat (200).

2. The large-size beam-type precision component alignment device according to claim 1, characterized in that: The two alignment seats (200) have multiple guide grooves (206) crisscrossed on the outer surface of one side of the workpiece beam, and the air guide holes (202) are located at the cross-shaped positions of each guide groove (206).

3. The large-size beam-type precision component alignment device according to claim 2, characterized in that: Each of the guide grooves (206) has a rounded corner at the edge of the groove facing the workpiece beam.

4. The large-size beam-type precision component alignment device according to claim 1, characterized in that: A limiting bracket (207) is installed inside the air guide hole (202). A valve stem (208) is slidably connected inside the limiting bracket (207). A return spring (209) is sleeved on the valve stem (208), and the return spring (209) is located in the middle of the valve stem (208).

5. The large-size beam-type precision component alignment device according to claim 1, characterized in that: Each of the air guide holes (202) is equipped with a sealed cylinder (210) that communicates with the inside of the air guide hole (202) on the side near the inner wall of the air chamber (201). The sealed cylinder (210) is connected to the valve stem (208) through it, and the sealing end of one end of the valve stem (208) can be in contact with or away from the inner wall of the sealed cylinder (210). The other end of the valve stem (208) extends out of the flow groove.

6. The large-size beam-type precision component alignment device according to claim 1, characterized in that: Each of the sealing frames (203) is symmetrically equipped with an air inlet pipe (211) on one side, and the two air inlet pipes (211) are respectively connected to the upper and lower air chambers inside the sealing frame (203); The upper air intake pipe (211) is connected to the external cold air supply pipe; the lower air intake pipe (211) is connected to the external hot air supply pipe.

7. The large-size beam-type precision component alignment device according to claim 1, characterized in that: Each of the sealing plates (205) has a second connecting groove (212) on its surface, and the second connecting grooves (212) of the upper sealing plate (205) and the lower sealing plate (205) are far apart from each other; Furthermore, the dimensions of the second connecting slot (212) are equal to those of the first connecting slot (204).

8. The large-size beam-type precision component alignment device according to claim 1, characterized in that: The lower pressure seat (102) is symmetrically fitted with a first-type (300) that can be moved laterally by a hydraulic rod on both sides. The length of the first-type (300) is equal to that of the lower pressure seat (102). Furthermore, the two alignment plates (300) move in opposite directions.

9. A large-size beam-type precision component alignment device according to claim 1, characterized in that: The upper surface of the calibration table (100) is provided with a hidden groove (301), and a support platform (302) that can be moved up and down by a hydraulic cylinder is provided in the hidden groove (301). The upper surface of the bearing platform (302) is flush with the upper surface of the straightening platform (100).

10. A large-size beam-type precision component alignment device according to claim 9, characterized in that: The support platform (302) is provided with two straightening plates (303) that can be moved laterally by hydraulic rods on both sides. The length of the straightening plates (303) is equal to that of the straightening platform (100). Furthermore, the two alignment plates (300) move in opposite directions.

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