A steel section punching processing device and method for steel structure processing

Abstract

The present invention relates to the field of punching technology, and specifically discloses a punching processing device and method for steel structure processing, wherein the punching processing device for steel structure processing is used for punching holes in the curved plate of the steel; it includes a workbench; a lifting frame; a punching unit arranged on the lifting frame; a positioning unit adapted to the punching point and an inner support unit adapted to the inner contour of the steel. The present invention uses the inner support unit adapted to the inner contour of the steel to support and fix the inner wall of the steel, so as to avoid partial collapse of the curved plate due to stress concentration during the punching process; at the same time, the cover shell and the positioning member in the positioning unit are used to locate the punching point and to limit the drill rod circumferentially, so as to ensure that the cutting position of the drill rod is consistent with the punching point, so as to avoid the drill rod and the punching point being offset or being bumped and scratched with the outer surface of the curved plate during the punching process, thereby improving the punching accuracy and the aesthetics of the hole position.

Description

Technical Field

[0001] The present invention relates to the technical field of punching, and more specifically, to a steel punching processing device and method for steel structure processing. Background Art

[0002] Steel section refers to a steel structure with a specific cross-sectional shape and size made by rolling or welding. In order to meet the assembly requirements of the steel section, it is necessary to perform drilling processing on the corresponding positions of the steel section;

[0003] See also Figure 1 The existing steel section 600 includes symmetrically distributed side panels 610 and arc-shaped panels 620 located at the upper ends of the two side panels 610, wherein a boss 630 is arranged on the inner side of the lower end of the side panel 610, and a slot 640 is opened between the bosses 630 on both sides; it is now necessary to perform drilling processing on both sides of the arc-shaped panel 620 of the steel section 600. Since the outer surface of the arc-shaped panel 620 is a curved surface, and the hole position deviates from the central axis of the steel section 600, during the drilling process, the contact position between the drill bit and the arc-shaped end surface cannot maintain a mutually perpendicular posture, which easily causes the drill bit to deviate from the hole position when starting, affecting the drilling accuracy, and at the same time, it will cause bumps and scratches on the outer surface of the arc-shaped panel 620, affecting the overall aesthetics of the steel section 600. Summary of the invention

[0004] In order to overcome the above technical problems, the present invention proposes a steel section punching processing device and method for steel structure processing.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A steel section punching processing device for steel structure processing, which is used for punching processing of steel sections; comprising:

[0007] A tooling table, on which clamping plates adapted to the steel sections are symmetrically arranged;

[0008] A lifting frame, which is escalably arranged above the workbench;

[0009] A drilling unit is arranged on the lifting frame, and comprises a drilling motor vertically fixed to the top of the lifting frame, wherein the output end of the drilling motor is connected to a drill rod;

[0010] The positioning unit is arranged on the lifting frame, and comprises a cylinder sleeve fixed on the lifting frame, an elastic telescopic rod movably arranged in the cylinder sleeve, and a positioning mechanism connected to the lower end of the elastic telescopic rod; the positioning mechanism comprises a cover shell sleeved on the periphery of the drill rod, a sealing airbag is arranged at the bottom of the cover shell, and a positioning piece adapted to the punching point is also arranged at the center of the cover shell;

[0011] The inner support unit is arranged on the tooling table and located between the clamping plates on both sides, and comprises two groups of inner support frames, which are symmetrically distributed on both sides of the drill rod. The outer side of the inner support frame is provided with an inner support airbag adapted to the inner contour of the steel section.

[0012] As a further solution of the present invention: a support frame is fixed above the workbench, a plurality of guide rods are vertically fixed between the support frame and the workbench, a sleeve slidably adapted to the guide rods is provided on the lifting frame, and a lifting cylinder for driving the lifting frame is installed on the support frame.

[0013] As a further solution of the present invention: the positioning member includes several groups of positioning plates distributed circumferentially on the cover shell, a pin is installed at the lower end of the positioning plate, an upper limit plate and a lower limit plate are respectively provided at the upper and lower ends of the positioning plate, a sliding rod slidably adapted to the upper limit plate and the lower limit plate is vertically fixed on the cover shell, a thrust spring is provided between the lower limit plate and the cover shell, and the thrust spring is movably sleeved on the corresponding sliding rod.

[0014] As a further solution of the present invention: the internal support unit also includes a mounting frame fixed to the workbench, the mounting frame is provided with an adjustment slide rail, the adjustment slide rail is located in the slot, the bottom of the internal support frame is rotatably connected with an adjustment slide, the adjustment slide is slidably connected to the adjustment slide rail, a rack is provided on one side of the adjustment slide rail, and the internal support frame is provided with a gear meshing with the rack.

[0015] As a further solution of the present invention: a driving cylinder is vertically installed at the bottom of the mounting frame, a driving plate is provided at the protruding end of the driving cylinder, connecting rods are hinged between the driving plate and the adjusting slides on both sides, and a through groove for accommodating the connecting rod is provided at the bottom of the adjusting slide rail.

[0016] As a further solution of the present invention: an air bin is arranged in the adjusting slide rail, an air passage connected to the interior of the inner support frame is opened in the adjusting slide table, a corrugated hose is connected between the air bin and the air passages on both sides, a piston plate is movably arranged in the air bin, a piston rod movably penetrating the air bin is connected to the piston plate, and the lower end of the piston rod is fixedly connected to the driving plate.

[0017] As a further solution of the present invention: it also includes a chip collecting unit arranged on the periphery of the drill rod, the chip collecting unit includes a connecting platform fixed on the lifting frame, an outer cylinder is arranged in the connecting platform, the lower end of the outer cylinder is movably connected to the inner cylinder, the bottom of the inner cylinder is detachably installed with a chip collecting head, a chip collecting cavity is opened in the chip collecting head, and an air pump connected with the outer cylinder is arranged on the lifting frame.

[0018] As a further solution of the present invention: a plurality of one-way valve plates are arranged at the bottom of the chip collecting chamber, and a filter element is arranged at one end of the inner cylinder extending into the chip collecting chamber.

[0019] As a further solution of the present invention: a plurality of wedge-shaped plates are circumferentially arranged on the inner side of the inner tube, ventilation grooves are formed between adjacent wedge-shaped plates, and a conical surface matching the wedge-shaped plates is arranged on the outer wall of the drill pipe.

[0020] The present invention also discloses a steel section punching processing method for steel structure processing, comprising the following steps:

[0021] S1. Install the steel section on the clamping plate;

[0022] S2, supporting and fixing the inner wall of the steel section by means of the inner support unit;

[0023] S3, the lifting frame moves downward, driving the cover to press the outer surface of the curved plate of the steel section;

[0024] S4, the positioning piece wraps and positions the punching point;

[0025] S5. Turn on the drilling motor and drive the drill rod to drill holes at the drilling points.

[0026] Beneficial effects of the present invention:

[0027] In the present invention, an inner support unit adapted to the inner contour of the steel section is used to support and fix the inner wall of the steel section, thereby preventing the arc plate from local collapse due to stress concentration during the drilling process; at the same time, a cover shell and a positioning member in the positioning unit are used to position the drilling point and to limit the drill rod circumferentially, thereby ensuring that the cutting position of the drill rod is consistent with the drilling point, thereby preventing the drill rod from offsetting the drilling point or colliding and scratching the outer surface of the arc plate during the drilling process, thereby improving the drilling accuracy and the aesthetics of the hole position. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a structural schematic diagram of the existing steel section;

[0030] Figure 2 It is a three-dimensional schematic diagram of the present invention;

[0031] Figure 3 A three-dimensional schematic diagram of another viewing angle of the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of the support frame and the lifting frame in the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the punching unit and the positioning unit in the present invention;

[0034] Figure 6 A schematic structural diagram of the punching unit and the positioning unit of the present invention from another perspective;

[0035] Figure 7It is a structural schematic diagram of the positioning mechanism in the present invention;

[0036] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0037] Fig. 9 It is a structural schematic diagram of the inner support unit in the present invention;

[0038] Fig.10 It is a structural schematic diagram of the inner support unit in the present invention from another perspective;

[0039] Fig.11 It is a schematic diagram of the structure of the inner support frame in the present invention;

[0040] Fig.12 is a cross-sectional view of the inner support unit in the present invention;

[0041] Fig.13 is a cross-sectional view of a chip collection unit in the present invention;

[0042] Fig.14 for Fig.13 Enlarged view of point B in the middle;

[0043] Fig.15 A cross-sectional view of the chip collecting unit of the present invention from another perspective;

[0044] Fig.16 for Fig.15 Enlarged view of center C.

[0045] In the figure:

[0046] 100, workbench; 101, clamping plate; 110, support frame; 111, guide rod; 112, lifting cylinder; 120, lifting frame; 121, sleeve;

[0047] 200, punching unit; 210, punching motor; 220, drill rod; 221, conical surface;

[0048] 300, positioning unit; 310, cylinder sleeve; 320, elastic telescopic rod; 330, positioning mechanism; 331, cover shell; 332, sealing airbag; 333, positioning member; 3331, positioning plate; 3332, upper limit plate; 3333, lower limit plate; 3334, sliding rod; 3335, thrust spring; 3336, ejector pin;

[0049] 400, inner support unit; 410, mounting frame; 420, adjusting slide rail; 421, through slot; 422, rack; 430, adjusting slide; 431, airway; 440, inner support frame; 441, gear; 450, inner support airbag; 460, air chamber; 461, corrugated hose; 462, piston rod; 463, piston plate; 470, driving cylinder; 471, driving plate; 472, connecting rod;

[0050] 500, chip collecting unit; 510, connecting platform; 520, outer cylinder; 530, inner cylinder; 531, wedge plate; 532, ventilation groove; 533, filter element; 540, chip collecting head; 541, chip collecting chamber; 542, one-way valve plate; 550, air pump;

[0051] 600, steel section; 610, side plate; 620, curved plate; 630, boss; 640, notch. DETAILED DESCRIPTION

[0052] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0053] See also Figure 2 and Figure 3 The present invention discloses a steel punching processing device for steel structure processing, which is used for punching a curved plate 620 of a steel 600; it includes a tooling table 100, a lifting frame 120, a punching unit 200, a positioning unit 300 and an inner support unit 400; a clamping plate 101 adapted to the steel 600 is symmetrically arranged on the tooling table 100;

[0054] See also Figure 4 , Figure 5 and Figure 6 , the lifting frame 120 is escalably arranged above the tooling table 100; the punching unit 200 is arranged on the lifting frame 120, including a punching motor 210 vertically fixed to the top of the lifting frame 120, and the output end of the punching motor 210 is connected to a drill rod 220; the positioning unit 300 is arranged on the lifting frame 120, including a cylinder sleeve 310 fixed on the lifting frame 120, an elastic telescopic rod 320 movably arranged in the cylinder sleeve 310, and a positioning mechanism 330 connected to the lower end of the elastic telescopic rod 320;

[0055] See also Figure 7 The positioning mechanism 330 includes a cover 331 sleeved on the periphery of the drill rod 220, a sealing airbag 332 is provided at the bottom of the cover 331, and a positioning member 333 adapted to the punching point is also provided at the center of the cover 331;

[0056] See also Fig. 9The inner support unit 400 is arranged on the tooling table 100 and between the two side clamping plates 101, and includes two groups of inner support frames 440, which are symmetrically distributed on both sides of the drill rod 220. The outer side of the inner support frame 440 is provided with an inner support airbag 450 adapted to the inner contour of the steel section 600;

[0057] Specifically, the steel 600 is placed between the two side clamping plates 101 of the tooling table 100, the punching points of the steel 600 are adjusted to be aligned with the drill rod 220 in the vertical direction, and air is inflated into the inner support airbag 450 to expand the inner support airbag 450, thereby supporting and fixing the inner wall of the steel 600;

[0058] The drilling motor 210 is started to drive the drill rod 220 to rotate, and the lifting frame 120 is moved downward, driving the drill rod 220 and the outer cover 331 to move downward synchronously. The sealing airbag 332 at the bottom of the cover 331 first contacts the outer surface of the curved plate 620 of the steel section 600, and the elastic telescopic rod 320 is elastically extended, thereby pressing the cover 331 against the outer surface of the curved plate 620, causing the sealing airbag 332 to be compressed and deformed and fit closely to the outer surface of the curved plate 620, thereby sealing and wrapping around the drilling point. At the same time, the positioning member 333 just covers the drilling point and performs a sealing operation on the drilling point. The positioning and locking are performed; as the lifting frame 120 continues to descend, the cover 331 always presses the arc plate 620 under the elastic force of the elastic telescopic rod 320, and at the same time, the lower end of the rotating drill rod 220 gradually enters the positioning member 333 and contacts the outer surface of the arc plate 620. The cover 331 and the positioning member 333 cooperate with each other to limit the circumferential position of the drill rod 220, so as to ensure that the cutting position of the drill rod 220 is consistent with the punching point, avoid the drill rod 220 and the punching point from being offset or the drill rod 220 from being bumped and scratched with the outer surface of the arc plate 620 during the punching process, and improve the punching accuracy and the aesthetics of the hole position.

[0059] It should be noted that, in the present invention, the inner support unit 400 adapted to the inner contour of the steel section 600 is used to support and fix the inner wall of the steel section 600, so as to avoid local collapse of the arc plate 620 due to stress concentration during the punching process; at the same time, the cover shell 331 and the positioning member 333 in the positioning unit 300 are used to locate the punching point and to limit the drill rod 220 circumferentially, so as to ensure that the cutting position of the drill rod 220 is consistent with the punching point, so as to avoid the drill rod 220 and the punching point from being offset or being bumped and scratched with the outer surface of the arc plate 620 during the punching process, thereby improving the punching accuracy and the aesthetics of the hole position.

[0060] In one embodiment, see Figure 4A support frame 110 is fixed above the tooling table 100, and a plurality of guide rods 111 are vertically fixed between the support frame 110 and the tooling table 100. A sleeve 121 slidably matched with the guide rod 111 is provided on the lifting frame 120, and a lifting cylinder 112 for driving the lifting frame 120 is installed on the support frame 110;

[0061] Specifically, the lifting frame 120 is driven to move along the guide rod 111 by the lifting cylinder 112 , so that the height of the lifting frame 120 can be adjusted, thereby achieving the height adjustment of the drill rod 220 and the positioning unit 300 .

[0062] For further information, see Figure 7 and Figure 8 The positioning member 333 includes a plurality of positioning plates 3331 circumferentially distributed on the cover 331, a pin 3336 is installed at the lower end of the positioning plate 3331, an upper limit plate 3332 and a lower limit plate 3333 are respectively provided at the upper and lower ends of the positioning plate 3331, a sliding rod 3334 slidably matched with the upper limit plate 3332 and the lower limit plate 3333 is vertically fixed on the cover 331, a thrust spring 3335 is provided between the lower limit plate 3333 and the cover 331, and the thrust spring 3335 is movably sleeved on the corresponding sliding rod 3334;

[0063] Specifically, when the cover shell 331 is pressed against the outer surface of the arc plate 620 under the elastic force of the elastic telescopic rod 320, under the action of the thrust spring 3335, the ejector pins 3336 at the bottom of each positioning plate 3331 are pressed against the outer surface of the arc plate 620. Since the ejector pins 3336 penetrate into the interior of the arc plate 620 and grasp the outer surface of the arc plate 620, the positioning plate 3331 and the arc plate 620 can be well fixed, and each positioning plate 3331 is used to surround the punching point, thereby effectively avoiding circumferential deviation of the drill rod 220 and causing punching failure.

[0064] It should be noted that due to the difference in height of different positions of the arc plate 620, the heights of the ejector pins 3336 in contact therewith are also different, and the height of the corresponding positioning plate 3331 is also adjusted accordingly, but the positioning plate 3331 can still maintain the effect of circumferential enclosure, thereby ensuring the accuracy of the punching position.

[0065] In another embodiment, considering that the width of the inner support frame 440 is greater than the width of the bottom notch 640 of the profile steel 600, there is a certain interference between the inner support frame 440 and the profile steel 600 in the vertical direction, which makes it inconvenient to install the profile steel 600; for this reason, please refer to Fig. 9 , Fig.10 and Fig.11The inner support unit 400 also includes a mounting frame 410 fixed to the workbench 100, an adjusting slide rail 420 is arranged on the mounting frame 410, the adjusting slide rail 420 is located in the notch 640, an adjusting slide table 430 is rotatably connected to the bottom of the inner support frame 440, the adjusting slide table 430 is slidably connected to the adjusting slide rail 420, a rack 422 is arranged on one side of the adjusting slide rail 420, and a gear 441 meshing with the rack 422 is arranged on the inner support frame 440; a driving cylinder 470 is vertically installed at the bottom of the mounting frame 410, a driving plate 471 is arranged at the protruding end of the driving cylinder 470, connecting rods 472 are hinged between the driving plate 471 and the adjusting slide tables 430 on both sides, and a through slot 421 for accommodating the connecting rod 472 is opened at the bottom of the adjusting slide rail 420;

[0066] Specifically, before installing the steel section 600, the driving cylinder 470 is driven to push the driving plate 471 upward, so that the connecting rods 472 on both sides are swung outward, thereby opening the adjusting slides 430 on both sides along the adjusting slide rails 420, so that the two groups of inner support frames 440 are separated from each other. At the same time, under the meshing transmission of the gear 441 and the rack 422, the inner support frames 440 and the corresponding adjusting slides 430 are driven to rotate relative to each other until the two groups of inner support frames 440 rotate 90 degrees, so that the inner support frames 440 are folded. At this time, the width of the inner support frames 440 is smaller than the width of the notch 640, so that the steel section 600 can be placed vertically downward on the clamping plate 101, so that the inner support frames 440 pass through the notch 640 and enter the interior of the steel section 600.

[0067] Then the driving cylinder 470 drives the driving plate 471 downward again, and under the action of the connecting rod 472, drives the inner support frames 440 on both sides to approach each other. At the same time, the inner support frames 440 and the corresponding adjustment slides 430 rotate relative to each other until the inner support frames 440 rotate 90°, so that the inner support frames 440 are expanded horizontally again to support and fix the inner wall of the steel section 600.

[0068] It is worth noting that the driving cylinder 470 is used to drive the adjustment slides 430 on both sides to move, thereby driving the inner support frames 440 on both sides to move toward each other, while making the inner support frames 440 themselves rotate synchronously to achieve the folding and unfolding of the inner support frames 440, facilitating the rapid installation of the steel section 600 and the stable adaptation of the inner support frames 440 and the steel section 600.

[0069] For further information, see Fig.12Considering the supporting effect of the inner support unit 400 and the folding smoothness of the inner support frame 440, an air bin 460 is arranged in the adjusting slide rail 420, an air passage 431 communicating with the inner support frame 440 is opened in the adjusting slide 430, a corrugated hose 461 is connected between the air bin 460 and the air passages 431 on both sides, a piston plate 463 is movably arranged in the air bin 460, a piston rod 462 movably penetrating the air bin 460 is connected to the piston plate 463, and the lower end of the piston rod 462 is fixedly connected to the driving plate 471;

[0070] Specifically, when the driving cylinder 470 drives the driving plate 471 upward, the inner support frames 440 on both sides move away from each other and fold, the corrugated hose 461 adaptively extends, and at the same time the piston rod 462 drives the piston plate 463 upward, so that the gas in the inner support airbag 450 is sucked into the air chamber 460 through the air channel 431 and the corrugated hose 461, so that the inner support airbag 450 shrinks and separates from the inner wall of the steel section 600, which is convenient for the disassembly and assembly of the steel section 600;

[0071] When the driving cylinder 470 drives the driving plate 471 downward, the inner support frames 440 on both sides approach each other and unfold, the corrugated hose 461 adaptively shortens, and at the same time the piston rod 462 drives the piston plate 463 downward, thereby pressing the gas in the gas chamber 460 into the inner support airbag 450 through the corrugated hose 461 and the airway 431, so that the inner support airbag 450 expands and fits tightly with the inner wall of the steel section 600, thereby enhancing the supporting effect on the inside of the steel section 600.

[0072] In further embodiments, see Figure 4 and Fig.13 , further comprising a chip collecting unit 500 disposed on the periphery of the drill rod 220, the chip collecting unit 500 comprising a connecting platform 510 fixed on the lifting frame 120, an outer cylinder 520 is disposed in the connecting platform 510, an inner cylinder 530 is movably connected to the lower end of the outer cylinder 520, a chip collecting head 540 is detachably mounted at the bottom of the inner cylinder 530, a chip collecting chamber 541 is provided in the chip collecting head 540, and an air pump 550 connected to the outer cylinder 520 is disposed on the lifting frame 120;

[0073] Specifically, when the lifting frame 120 drives the drill rod 220 downward, the chip collecting head 540 contacts the positioning piece 333, and the air pump 550 is turned on to suck out the air in the chip collecting head 540 through the inner cylinder 530 and the outer cylinder 520, thereby generating negative pressure at the opening at the lower end of the chip collecting head 540. When the drill rod 220 drills and cuts the steel section 600, the generated debris is sucked into the chip collecting chamber 541 in the chip collecting head 540 under the action of negative pressure, thereby collecting the debris.

[0074] For further information, see Fig.14In order to prevent the debris in the chip collecting chamber 541 from flowing back or entering the inner cylinder 530, a plurality of one-way valve plates 542 are provided at the bottom of the chip collecting chamber 541, and a filter element 533 is provided at one end of the inner cylinder 530 extending into the chip collecting chamber 541;

[0075] Specifically, when the air pump 550 is turned on, the one-way valve plate 542 opens unidirectionally upward, thereby facilitating the entry of debris into the chip collecting chamber 541. The upper filter element 533 intercepts the debris, thereby preventing the debris from entering the inner tube 530. After the air pump 550 is turned off, the one-way valve plate 542 is closed, thereby preventing the debris in the chip collecting chamber 541 from falling to the outside.

[0076] Furthermore, during the drilling process of the drill rod 220, the height of the lifting frame 120 is gradually reduced, so that the height of the outer cylinder 520 is also gradually reduced, while the height of the chip collecting head 540 remains unchanged, so that the inner cylinder 530 will gradually move upward relative to the outer cylinder 520; please refer to Fig.15 and Fig.16 A plurality of wedge-shaped plates 531 are circumferentially arranged on the inner side of the inner tube 530, and ventilation grooves 532 are formed between adjacent wedge-shaped plates 531. The outer wall of the drill rod 220 is provided with a conical surface 221 adapted to the wedge-shaped plates 531;

[0077] Specifically, the ventilation grooves 532 between adjacent wedge plates 531 can ensure smooth flow of air between the inner cylinder 530 and the drill rod 220. In addition, the conical surface 221 on the drill rod 220 can limit the axial stroke of the inner cylinder 530, thereby preventing the inner cylinder 530 from being separated from the drill rod 220 and the outer cylinder 520, thereby ensuring the airtightness and connection stability of the entire structure.

[0078] In addition, the present invention also provides a method for punching holes in steel sections for steel structure processing, comprising the following steps:

[0079] S1, installing the steel section 600 on the clamping plate 101;

[0080] S2, supporting and fixing the inner wall of the steel section 600 by the inner support unit 400;

[0081] S3, the lifting frame 120 moves downward, driving the cover 331 to press the outer surface of the curved plate 620 of the steel section 600;

[0082] S4, the positioning member 333 performs package positioning at the punching point;

[0083] S5, turning on the drilling motor 210, and driving the drill rod 220 to drill holes at the drilling points.

[0084] The specific implementation methods of this embodiment are described above, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms inspired by this embodiment, all of which are within the protection of this embodiment.

Claims

1. A steel punching device for steel structure processing, characterized in that: Used for punching a curved plate (620) of a steel section (600); comprising: A tooling table (100) on which clamping plates (101) adapted to the steel sections (600) are symmetrically arranged; A lifting frame (120) which is escalably disposed above the tooling platform (100); A punching unit (200) is disposed on the lifting frame (120), comprising a punching motor (210) vertically fixed to the top of the lifting frame (120), wherein an output end of the punching motor (210) is connected to a drill rod (220); A positioning unit (300) is arranged on the lifting frame (120), comprising a cylinder sleeve (310) fixed on the lifting frame (120), an elastic telescopic rod (320) movably arranged in the cylinder sleeve (310), and a positioning mechanism (330) connected to the lower end of the elastic telescopic rod (320); the positioning mechanism (330) comprises a cover (331) sleeved on the periphery of the drill rod (220), a sealing airbag (332) is arranged at the bottom of the cover (331), and a positioning piece (333) adapted to the drilling point is also arranged at the center of the cover (331); An internal support unit (400) is arranged on the tooling table (100) and between the two side clamping plates (101), and comprises two groups of internal support frames (440), the two groups of internal support frames (440) are symmetrically distributed on both sides of the drill rod (220), and the outer sides of the internal support frames (440) are provided with internal support air bags (450) adapted to the inner contour of the section steel (600); A support frame (110) is fixed above the tooling table (100); a plurality of guide rods (111) are vertically fixed between the support frame (110) and the tooling table (100); a sleeve (121) slidably adapted to the guide rods (111) is provided on the lifting frame (120); and a lifting cylinder (112) for driving the lifting frame (120) is installed on the support frame (110); The positioning member (333) comprises a plurality of groups of positioning plates (3331) circumferentially distributed on the cover shell (331); a pin (3336) is installed at the lower end of the positioning plate (3331); an upper limit plate (3332) and a lower limit plate (3333) are respectively arranged at the upper and lower ends of the positioning plate (3331); a sliding rod (3334) slidably matched with the upper limit plate (3332) and the lower limit plate (3333) is vertically fixed on the cover shell (331); a thrust spring (3335) is arranged between the lower limit plate (3333) and the cover shell (331); and the thrust spring (3335) is movably sleeved on the corresponding sliding rod (3334).

2. A steel section punching device for steel structure processing according to claim 1, characterized in that: The inner support unit (400) further comprises a mounting frame (410) fixed to the workbench (100); an adjusting slide rail (420) is arranged on the mounting frame (410); the adjusting slide rail (420) is located in the notch (640); an adjusting slide table (430) is rotatably connected to the bottom of the inner support frame (440); the adjusting slide table (430) is slidably connected to the adjusting slide rail (420); a rack (422) is arranged on one side of the adjusting slide rail (420); and a gear (441) meshing with the rack (422) is arranged on the inner support frame (440).

3. A steel section punching device for steel structure processing according to claim 2, characterized in that: A driving cylinder (470) is vertically mounted at the bottom of the mounting frame (410); a driving plate (471) is provided at the protruding end of the driving cylinder (470); connecting rods (472) are hingedly connected between the driving plate (471) and the adjusting slides (430) on both sides; and a through slot (421) for accommodating the connecting rod (472) is provided at the bottom of the adjusting slide rail (420).

4. A steel section punching device for steel structure processing according to claim 3, characterized in that: An air bin (460) is arranged in the adjusting slide rail (420), an air passage (431) communicating with the interior of the inner support frame (440) is provided in the adjusting slide table (430), a corrugated hose (461) is connected between the air bin (460) and the air passages (431) on both sides, a piston plate (463) is movably arranged in the air bin (460), a piston rod (462) movably penetrating the air bin (460) is connected to the piston plate (463), and the lower end of the piston rod (462) is fixedly connected to the driving plate (471).

5. The steel section punching device for steel structure processing according to claim 1, characterized in that: The invention also comprises a chip collecting unit (500) arranged on the periphery of the drill rod (220), the chip collecting unit (500) comprising a connecting platform (510) fixed on the lifting frame (120), an outer cylinder (520) being arranged inside the connecting platform (510), an inner cylinder (530) being movably connected to the lower end of the outer cylinder (520), a chip collecting head (540) being detachably mounted on the bottom of the inner cylinder (530), a chip collecting chamber (541) being provided inside the chip collecting head (540), and an air pump (550) being connected to the outer cylinder (520) being arranged on the lifting frame (120).

6. The steel section punching device for steel structure processing according to claim 5, characterized in that: A plurality of one-way valve plates (542) are provided at the bottom of the chip collecting chamber (541), and a filter element (533) is provided at one end of the inner cylinder (530) extending into the chip collecting chamber (541).

7. A steel section punching device for steel structure processing according to claim 6, characterized in that: A plurality of wedge-shaped plates (531) are circumferentially arranged on the inner side of the inner cylinder (530), and ventilation grooves (532) are formed between adjacent wedge-shaped plates (531). The outer wall of the drill rod (220) is provided with a conical surface (221) adapted to the wedge-shaped plates (531).

8. A method for using the steel structure punching device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Install the steel section (600) on the clamping plate (101); S2, supporting and fixing the inner wall of the steel section (600) by means of the inner support unit (400); S3, the lifting frame (120) moves downward, driving the cover shell (331) to press against the outer surface of the curved plate (620) of the steel section (600); S4, the positioning member (333) performs wrapping positioning on the punching point; S5, turning on the drilling motor (210) to drive the drill rod (220) to drill holes at the drilling points.

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