An arc-shaped angle steel punching device and a method for using the same

Abstract

The application discloses an arc-shaped angle steel punching device and a using method thereof, which comprises a punching mechanism for punching arc-shaped angle steels, a correction auxiliary mechanism located on the punching mechanism and used for correcting and unifying the arc of the arc-shaped angle steels, the punching mechanism comprises a punch assembly used for punching operation of the arc-shaped angle steels, a lower die assembly located below the punch assembly and used for fixing the correction auxiliary mechanism and the arc-shaped angle steels, and the correction auxiliary mechanism corrects the arcs of the arc-shaped angle steels into the same arc so that the punch assembly can punch the arc-shaped angle steels accurately.

Description

Technical Field

[0001] This invention relates to the installation of power utility tunnels, specifically to a punching device for arc-shaped angle steel and its method of use. Background Technology

[0002] In the design of power utility tunnels, some design institutes use pre-embedded channels within the tunnel segments. During installation, T-bolts are used to mount brackets of different specifications onto these channels. Other design institutes use ring-shaped angle steel fixed to the inner wall of the constructed tunnel. These angle steels have bolt holes, and brackets of different specifications are then mounted onto them using bolts. For heavy-duty power supports, double-layered angle steels are often used, fixed back-to-back to the inner wall of the tunnel. To ensure that all brackets are horizontal after installation, the bolt holes on the angle steel must be positioned very precisely. If a method of punching holes in right-angle steel and then rolling them is used, the inconsistent length changes after rolling can cause significant errors in the positional accuracy of the bolt holes. If the error exceeds the permissible range, the bolts will not be able to pass through the bolt holes of the set of angle steels, thus affecting subsequent installation.

[0003] Existing curved angle steel is processed by a rolling mill, resulting in a certain deviation in its curvature. If holes are punched directly into the curved angle steel, the precision between the holes is also difficult to guarantee. For example, Chinese patent CN213224417U discloses a punching fixture for angle steel processing, including a worktable and a punching assembly set on the worktable. A fixing assembly is installed on the worktable; the fixing assembly includes an ejection assembly and a pressing assembly; the ejection assembly includes a hollow sleeve, a lifting rod, an arc-shaped block, strip holes, a first insert rod, a first locking block, and a first tension spring. The lifting rod is movably sleeved on the top surface of the hollow sleeve, and the bottom end of the lifting rod extends into the inner cavity of the hollow sleeve. An arc-shaped block is installed at the top of the lifting rod, and multiple strip holes are opened on the front end face of the lifting rod, with equal spacing between the multiple strip holes. A first insert rod is installed at the top of the front end face of the hollow sleeve, and first locking blocks are installed at the bottom of both sides of the lifting rod. The patent lacks a correction mechanism for the annular angle steel because the curved angle steel is processed by a rolling mill, resulting in a certain deviation in its curvature. If holes are punched directly into the curved angle steel, the accuracy between the holes is also difficult to guarantee.

[0004] Therefore, providing a punching device for arc angle steel with high punching accuracy and interchangeable arc angle steels during installation, as well as its usage method, has become a problem worthy of research. Summary of the Invention

[0005] The purpose of this invention is to provide a punching device for arc angle steel with high punching accuracy and interchangeable arc angle steels during installation, as well as its usage method.

[0006] The objective of this invention is achieved as follows:

[0007] A punching device for arc-shaped angle steel includes a punching mechanism for punching arc-shaped angle steel and a correction auxiliary mechanism located on the punching mechanism for correcting and unifying the curvature of the arc-shaped angle steel. The punching mechanism includes a punch assembly for punching the arc-shaped angle steel and a lower die assembly located below the punch assembly for fixing the correction auxiliary mechanism and the arc-shaped angle steel. The correction auxiliary mechanism corrects the curvature of multiple arc-shaped angle steels to the same curvature so that the punch assembly can accurately punch multiple arc-shaped angle steels.

[0008] The correction auxiliary mechanism includes an arc-shaped positioning plate for fixing and correcting the arc-shaped angle steel, a rotary shaft fixedly connected to the arc-shaped positioning plate via a connecting rod, an annular groove located on the arc-shaped positioning plate and connected to the lower mold assembly, several eccentric wheels located on the arc-shaped positioning plate and inside the annular groove, several cylindrical pins located on the arc-shaped positioning plate and outside the annular groove, and several conical insertion notches located on the outer side of the arc-shaped positioning plate for fixing the arc-shaped positioning plate to the lower mold assembly. The arc-shaped angle steel is located directly between the eccentric wheels and cylindrical pins and its curvature is corrected.

[0009] The rotating shaft is connected to the bracket, and after punching, the arc-shaped positioning plate can be rotated. The arc-shaped positioning plate is provided with a round hole and an end positioning pin.

[0010] The lower part of the arc-shaped positioning plate is provided with an arc-shaped support frame and a caster wheel located on the arc-shaped support frame. The upper surface of the caster wheel is in contact with the lower surface of the arc-shaped positioning plate.

[0011] The position of the tapered notch corresponds to the position of the punched hole on the annular angle steel.

[0012] The lower mold assembly includes a fixed plate on the frame, a die and a positioning pin on the upper surface of the fixed plate, and two fixing bodies located on the front and rear sides of the fixed plate to fix the correction auxiliary mechanism to the fixed plate. The two fixing bodies are respectively located on the front and rear sides of the fixed plate and are symmetrically arranged.

[0013] The fixed body includes a cylinder seat located on the frame, a cylinder that mates with the cylinder seat, a tapered pin located at the end of the cylinder, and a guide groove located on the frame that allows the cylinder to pass through.

[0014] A method for using an arc-shaped angle steel punching device includes the following steps: Step 1: First, install the punching mechanism onto the punch press and connect the air source to the punch assembly cylinder; first, place the arc-shaped positioning plate on the fixed plate; make the annular groove of the arc-shaped positioning plate fit on the die; the upper plane of the two dies is flush with the upper plane of the arc-shaped positioning plate; adjust the position of the arc-shaped positioning plate so that the two round holes on the arc-shaped positioning plate are aligned with the two positioning pin holes on the fixed plate, and insert the two positioning pins; start the two cylinder switches so that the conical pins installed at the cylinder ends are inserted into the conical notches on the inner and outer sides of the arc-shaped positioning plate; fix the rotation shaft of the arc-shaped positioning plate into the bracket on the bottom surface, and fix the bracket firmly with anchor bolts.

[0015] Step 2: Pull out the two positioning pins and loosen the two cylinder-driven conical pins. Rotate the arc-shaped positioning plate clockwise and counterclockwise respectively. Along the movement trajectory of the arc-shaped positioning plate, install an arc-shaped support frame below it. Several bullseye omnidirectional balls are installed on the upper part of the arc-shaped support frame. Adjust the height of the support frame so that the bullseye omnidirectional balls are just supported on the lower end surface of the arc-shaped positioning plate. The arc-shaped positioning plate rotates easily around the pivot on the arc-shaped support frame. Fix the arc-shaped support frame to the ground with anchor bolts. The equipment installation and commissioning work is completed.

[0016] Step 3: During operation, first place the arc-shaped angle steel on the arc-shaped positioning plate, with one end resting against the end positioning pin of the arc-shaped positioning plate; then rotate the eccentric wheel handle to press the outer surface of the arc-shaped angle steel tightly against the surface of a series of cylindrical pins on the arc-shaped positioning plate; at this point, the geometric dimensions of the arc-shaped angle steel match the shape of the arc-shaped positioning plate, thus fixing the arc-shaped angle steel to the arc-shaped positioning plate; rotate the arc-shaped positioning plate by hand, and when the position sensor installed on the punching mechanism detects the position of the conical insertion notch on the inner and outer sides of the arc-shaped fixing plate, the two cylinders start simultaneously, driving the two conical insertion pins to lock the arc-shaped positioning plate to the punching mold; at the same time, start the switch of the punch assembly to perform punching;

[0017] Step 4: After punching a set of bolt holes, continue to rotate the arc-shaped positioning plate and repeat the above actions until all holes of the arc-shaped angle steel are punched; release the eccentric wheel handle and take out the workpiece that has been punched; then put in a new workpiece and repeat the operation.

[0018] The beneficial effects of this invention are as follows: By setting up a lower die assembly and a correction auxiliary tool, the arc-shaped angle steel is fixed against a high-precision arc-shaped positioning plate. Then, the arc-shaped angle steel, together with the arc-shaped positioning plate, rotates around the arc center of the arc-shaped angle steel to a designated position and automatically locks. Punching is then performed, achieving relatively high punching accuracy and work efficiency. The arc-shaped angle steel can be interchanged arbitrarily during installation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the lower mold assembly of the present invention;

[0021] Figure 3 for Figure 2 Top view;

[0022] Figure 4 for Figure 3 The right view;

[0023] Figure 5 This is a schematic diagram of the correction auxiliary mechanism of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the correction auxiliary mechanism of the present invention fixed on the lower mold assembly;

[0025] Figure 7 This is a schematic diagram of the structure of the correction auxiliary mechanism and the arc-shaped angle steel on the lower mold assembly of the present invention;

[0026] In the diagram: 1. Correction auxiliary mechanism; 2. Punching mechanism; 3. Bracket; 4. Arc-shaped support frame; 5. Universal ball; 6. Arc-shaped angle steel; 11. Arc-shaped positioning plate; 12. Conical insertion notch; 13. Annular groove; 14. Eccentric wheel; 15. Cylindrical pin; 16. End positioning pin; 17. Rotary shaft; 18. Circular hole; 19. Connecting rod; 21. Punch assembly; 22. Lower die assembly; 221. Die; 222. Fixing plate; 223. Fixing body; 224. Frame; 225. Positioning pin; 2231. Cylinder; 2232. Conical insertion pin; 2233. Guide groove; 2234. Cylinder seat. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0028] like Figure 1As shown, a punching device for arc-shaped angle steel includes a punching mechanism 2 for punching arc-shaped angle steel 6, and a correction auxiliary mechanism 1 located on the punching mechanism 2 for correcting and unifying the curvature of the arc-shaped angle steel 6. The punching mechanism 2 includes a punch assembly 21 for punching the arc-shaped angle steel 6, and a lower die assembly 22 located below the punch assembly 21 for fixing the correction auxiliary mechanism 1 and the arc-shaped angle steel 6. The correction auxiliary mechanism 1 corrects the curvature of multiple arc-shaped angle steels 6 to the same curvature to ensure accurate punching of multiple arc-shaped angle steels 6 by the punch assembly 21. The punch assembly 21 includes a punch and a drive motor for driving the punch to perform punching. By setting the lower die assembly and correction auxiliary tool, the arc-shaped angle steel is fixed against a high-precision arc-shaped positioning plate. Then, the arc-shaped angle steel, together with the arc-shaped positioning plate, rotates around the arc center of the arc-shaped angle steel to a designated position and automatically locks before punching. This achieves relatively high punching accuracy and high work efficiency. During installation, the curved angle steel can be interchanged arbitrarily.

[0029] like Figures 5 to 7 As shown, the correction auxiliary mechanism 1 includes an arc-shaped positioning plate 11 for fixing and correcting the arc-shaped angle steel 6, a rotary shaft 17 fixedly connected to the arc-shaped positioning plate 11 via a connecting rod 19, an annular groove 13 located on the arc-shaped positioning plate 11 and connected to the lower mold assembly 22, a plurality of eccentric wheels 14 located on the arc-shaped positioning plate 11 and inside the annular groove 13, a plurality of cylindrical pins 15 located on the arc-shaped positioning plate 11 and outside the annular groove 13, and a plurality of conical insertion notches 12 located on the outer side of the arc-shaped positioning plate 11 for fixing the arc-shaped positioning plate 11 to the lower mold assembly 22; the arc-shaped angle steel 6 is located directly on the eccentric wheels 14 and cylindrical pins 15 and its curvature is corrected. The function of the eccentric wheels 14 and cylindrical pins 15 is to correct and fix the arc-shaped angle steel 6. The rotating shaft 17 is connected to the bracket 3. After punching, the arc-shaped positioning plate 11 can rotate. The arc-shaped positioning plate 11 is provided with a round hole 18 and an end positioning pin 16. The end positioning pin 16 is used to fix the end of the arc-shaped positioning plate 11. The lower part of the arc-shaped positioning plate 11 is provided with an arc-shaped support frame 4 and a universal wheel 5 located on the arc-shaped support frame 4. The upper surface of the universal wheel 5 contacts the lower surface of the arc-shaped positioning plate 11 to reduce the friction when the arc-shaped support frame 4 rotates. The position of the conical insertion notch 12 corresponds to the position of the punching hole on the annular angle steel 6 to make the punching position accurate. The conical insertion notch 12 is used to connect the arc-shaped positioning plate 11 and the arc-shaped angle steel 6.

[0030] like Figures 2 to 4As shown, the lower mold assembly 22 includes a fixed plate 222 on the frame 224, a concave mold 221 and a positioning pin 225 on the upper surface of the fixed plate 222, and a fixing body 223 located on the front and rear sides of the fixed plate 222 and fixing the correction auxiliary mechanism 1 to the fixed plate 222. Two fixing bodies 223 are provided, and the two fixing bodies 223 are respectively located on the front and rear sides of the fixed plate 222 and are symmetrically arranged. This facilitates the uniform force distribution when fixing the arc-shaped positioning plate 11 and avoids the phenomenon of tilting when fixing the arc-shaped positioning plate 11, thereby making the position of the arc-shaped angle steel fixed accurately, that is, the drilling position is accurate. The fixing body 223 includes a cylinder seat 2234 located on the frame 224, a cylinder 2231 cooperating with the cylinder seat 2234, a tapered pin 2232 located at the end of the cylinder 2231, and a guide groove 2233 located on the frame 224 for the cylinder 2231 to pass through. When it is necessary to fix the arc-shaped positioning plate 11 to the fixing plate 222, the annular groove 13 of the arc-shaped positioning plate 11 is fitted onto the concave mold 221, and then the circular hole 18 is aligned with the positioning pin hole, and the positioning pin is inserted. Position pin 225, at this time the drive cylinder 2231 drives the conical pin 2232 through the guide groove 2233 and cooperates with the conical insertion notch 12. At this time, the arc-shaped positioning plate 11 and the fixed plate 222 are positioned. Then the rotary shaft 17 is fixed to the bracket 3 so that the arc-shaped positioning plate 11 rotates relative to the bracket 3. After that, the positioning pin 225 is pulled out. When punching operation is required, the arc-shaped positioning plate 11 is rotated, that is, the conical pin is inserted into the conical insertion notch 12 to achieve the positioning of punching. Example

[0031] A method for using an arc-shaped angle steel punching device includes the following steps: Step 1: First, install the punching mechanism 2 onto the punch press and connect the air source to the cylinder of the punch assembly 21; first, place the arc-shaped positioning plate 11 on the fixed plate 222; make the annular groove 13 of the arc-shaped positioning plate 11 fit onto the die 221; the upper plane of the two dies 221 is flush with the upper plane of the arc-shaped positioning plate 11; adjust the position of the arc-shaped positioning plate 11 so that the two round holes 18 on the arc-shaped positioning plate 11 are aligned with the two positioning pin holes on the fixed plate, and insert the two positioning pins; start the two cylinder switches so that the conical pins installed at the cylinder ends are inserted into the conical insertion notches on the inner and outer sides of the arc-shaped positioning plate; fix the rotation shaft of the arc-shaped positioning plate into the bracket on the bottom surface, and fix the bracket 3 firmly with anchor bolts.

[0032] Step 2: Pull out the two positioning pins and loosen the two cylinder-driven conical pins. Rotate the arc-shaped positioning plate clockwise and counterclockwise respectively. Along the movement trajectory of the arc-shaped positioning plate, install an arc-shaped support frame below it. Several bullseye omnidirectional balls are installed on the upper part of the arc-shaped support frame. Adjust the height of the support frame so that the bullseye omnidirectional balls are just supported on the lower end surface of the arc-shaped positioning plate. The arc-shaped positioning plate rotates easily around the pivot on the arc-shaped support frame. Fix the arc-shaped support frame to the ground with anchor bolts. The equipment installation and commissioning work is completed.

[0033] Step 3: During operation, first place the arc-shaped angle steel on the arc-shaped positioning plate, with one end resting against the end positioning pin of the arc-shaped positioning plate; then rotate the eccentric wheel handle to press the outer surface of the arc-shaped angle steel tightly against the surface of a series of cylindrical pins on the arc-shaped positioning plate; at this point, the geometric dimensions of the arc-shaped angle steel match the shape of the arc-shaped positioning plate, thus fixing the arc-shaped angle steel to the arc-shaped positioning plate; rotate the arc-shaped positioning plate by hand, and when the position sensor installed on the punching mechanism detects the position of the conical insertion notch on the inner and outer sides of the arc-shaped fixing plate, the two cylinders start simultaneously, driving the two conical insertion pins to lock the arc-shaped positioning plate to the punching mold; at the same time, start the switch of the punch assembly to perform punching;

[0034] Step 4: After punching a set of bolt holes, continue to rotate the arc-shaped positioning plate and repeat the above actions until all holes of the arc-shaped angle steel are punched; release the eccentric wheel handle and take out the workpiece that has been punched; then put in a new workpiece and repeat the operation.

Claims

1. A punching device for arc-shaped angle steel, characterized in that: The device includes a punching mechanism for punching curved angle steel, and a correction auxiliary mechanism located on the punching mechanism for correcting and unifying the curvature of the curved angle steel. The punching mechanism includes a punch assembly for punching the curved angle steel, and a lower die assembly located below the punch assembly for fixing the correction auxiliary mechanism and the curved angle steel. The correction auxiliary mechanism corrects the curvature of multiple curved angle steels to the same curvature so that the punch assembly can accurately punch multiple curved angle steels.

2. The arc-shaped angle steel punching device according to claim 1, characterized in that: The correction auxiliary mechanism includes an arc-shaped positioning plate for fixing and correcting the arc-shaped angle steel, a rotary shaft fixedly connected to the arc-shaped positioning plate via a connecting rod, an annular groove located on the arc-shaped positioning plate and connected to the lower mold assembly, several eccentric wheels located on the arc-shaped positioning plate and inside the annular groove, several cylindrical pins located on the arc-shaped positioning plate and outside the annular groove, and several conical insertion notches located on the outer side of the arc-shaped positioning plate for fixing the arc-shaped positioning plate to the lower mold assembly. The arc-shaped angle steel is located between the eccentric wheels and the cylindrical pins and its curvature is corrected.

3. The arc-shaped angle steel punching device according to claim 2, characterized in that: The rotating shaft is connected to the bracket, and after punching, the arc-shaped positioning plate can be rotated. The arc-shaped positioning plate is provided with a round hole and an end positioning pin.

4. The arc-shaped angle steel punching device according to claim 2, characterized in that: The lower part of the arc-shaped positioning plate is provided with an arc-shaped support frame and a caster wheel located on the arc-shaped support frame. The upper surface of the caster wheel is in contact with the lower surface of the arc-shaped positioning plate.

5. The arc-shaped angle steel punching device according to claim 2, characterized in that: The position of the tapered notch corresponds to the position of the punched hole on the annular angle steel.

6. The arc-shaped angle steel punching device according to claim 5, characterized in that: The lower mold assembly includes a fixed plate on the frame, a die and a positioning pin on the upper surface of the fixed plate, and two fixing bodies located on the front and rear sides of the fixed plate to fix the correction auxiliary mechanism to the fixed plate. The two fixing bodies are respectively located on the front and rear sides of the fixed plate and are symmetrically arranged.

7. The arc-shaped angle steel punching device according to claim 6, characterized in that: The fixed body includes a cylinder seat located on the frame, a cylinder that mates with the cylinder seat, a tapered pin located at the end of the cylinder, and a guide groove located on the frame that allows the cylinder to pass through.

8. A method of using the arc-shaped angle steel punching device as described in claim 7, characterized in that: Includes the following steps: Step 1: First, install the punching mechanism onto the punch press and connect the air supply to the punch assembly cylinder; first, place the arc-shaped positioning plate on the fixed plate; make the annular groove of the arc-shaped positioning plate fit on the die; make the upper surface of the two dies flush with the upper surface of the arc-shaped positioning plate; adjust the position of the arc-shaped positioning plate so that the two round holes on the arc-shaped positioning plate are aligned with the two positioning pin holes on the fixed plate, and insert the two positioning pins; Activate the two cylinder switches to insert the conical pins installed at the cylinder ends into the conical notches on the inner and outer sides of the arc-shaped positioning plate; fix the rotation shaft of the arc-shaped positioning plate into the bracket on the bottom surface, and secure the bracket firmly with anchor bolts; Step 2: Pull out the two positioning pins and loosen the two cylinder-driven conical pins. Rotate the arc-shaped positioning plate clockwise and counterclockwise respectively. Along the movement trajectory of the arc-shaped positioning plate, install an arc-shaped support frame below it. Several bullseye omnidirectional balls are installed on the upper part of the arc-shaped support frame. Adjust the height of the support frame so that the bullseye omnidirectional balls are just supported on the lower end surface of the arc-shaped positioning plate. The arc-shaped positioning plate rotates easily around the pivot on the arc-shaped support frame. Fix the arc-shaped support frame to the ground with anchor bolts. The equipment installation and commissioning work is completed. Step 3: During operation, first place the arc-shaped angle steel on the arc-shaped positioning plate, with one end resting against the end positioning pin of the arc-shaped positioning plate; then rotate the eccentric wheel handle to press the outer surface of the arc-shaped angle steel tightly against the surface of a series of cylindrical pins on the arc-shaped positioning plate; at this point, the geometric dimensions of the arc-shaped angle steel match the shape of the arc-shaped positioning plate, thus fixing the arc-shaped angle steel to the arc-shaped positioning plate; rotate the arc-shaped positioning plate by hand, and when the position sensor installed on the punching mechanism detects the position of the conical insertion notch on the inner and outer sides of the arc-shaped fixing plate, the two cylinders start simultaneously, driving the two conical insertion pins to lock the arc-shaped positioning plate to the punching mold; at the same time, start the switch of the punch assembly to perform punching; Step 4: After punching a set of bolt holes, continue to rotate the arc-shaped positioning plate and repeat the above actions until all holes of the arc-shaped angle steel are punched; release the eccentric wheel handle and take out the workpiece that has been punched; then put in a new workpiece and repeat the operation.

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