Arc-shaped steel manufacturing device

Abstract

The invention provides an arc-shaped steel manufacturing device which comprises a supporting frame, a stamping component and a die component, the supporting frame comprises a base, supporting rods are arranged at the four corners of the base, and a top plate is supported at the upper ends of the four supporting rods; the stamping component comprises a lifting rod arranged in the middle of the top plate in a penetrating mode, the lower end of the lifting rod is detachably connected with a stamping block, and the lower end face of the stamping block is an arc face. The mold component comprises a detachable arc-shaped mold arranged on the base, the arc-shaped mold comprises an arc-shaped bottom and a side plate arranged on the arc-shaped edge of the arc-shaped bottom, the lifting rod is driven by a motor assembly to ascend and descend, and a pressure sensor is arranged between the base and the arc-shaped mold. By the adoption of the arc-shaped steel bending device, steel can be bent and machined into a needed arc, the machining efficiency of the arc-shaped steel is improved, and the construction cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel processing equipment, and more specifically, to a device for making arc-shaped steel. Background Art

[0002] In the process of mine construction, circular structure beams or supports are often needed, such as the outermost circular side beams of the hoisting platform used in the shaft construction process, and the arch, arc, and three-center arch supports required in the tunnel or chamber excavation process. They are all made of long straight steel. If large equipment is rented for processing, the rental fee is high and professional technicians are required to operate, which increases the project cost. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide a curved steel manufacturing device, which can bend the steel into a required arc shape, thereby improving the processing efficiency of the curved steel and saving construction costs.

[0004] The present invention provides a curved steel manufacturing device, comprising a support frame, a stamping component and a die component, wherein:

[0005] The support frame comprises a base, support rods are arranged at four corners of the base, and a top plate is supported at the upper ends of the four support rods;

[0006] The punching component comprises a lifting rod penetrating the middle part of the top plate, a punching block is detachably connected to the lower end of the lifting rod, and the lower end surface of the punching block is a curved surface;

[0007] The mold component comprises a detachable arc mold arranged on the base, the arc mold comprises an arc bottom and a side plate arranged on the arc edge of the arc bottom, the arc bottom and the arc surface have the same radius, the arc length of the arc surface is not greater than the arc length of the arc steel to be punched, and the width of the arc surface is not greater than the inner width of the arc bottom;

[0008] The lifting rod is driven to rise and fall by a motor assembly. A pressure sensor is arranged between the base and the arc mold. The pressure sensor is electrically connected to the motor assembly through a controller. When the pressure value detected by the pressure sensor is greater than a set value, the controller controls the motor assembly to drive the lifting rod to rise above the arc mold.

[0009] The lifting rod is a lead screw, which is passed through the center of the worm wheel. An internal thread matching the lead screw is provided in the center of the worm wheel, and the worm wheel is driven to rotate by the worm; connecting rods are connected to both ends of the worm, and the connecting rods are provided in a bearing seat. The bearing seat is fixed to the lower side of the top plate, and the motor assembly drives the connecting rod to rotate.

[0010] The motor assembly includes a rotating motor arranged above the top plate, the rotating shaft of the rotating motor extends horizontally from the top plate and is connected to a first pulley, a connecting rod in the same direction as the rotating shaft extends from the top plate and is connected to a second pulley, and a belt is connected between the first pulley and the second pulley; the pressure sensor is connected to the rotating motor through the controller.

[0011] A thread hole matched with the lead screw is arranged in the middle of the top plate.

[0012] A straight rod is connected to the lower end of the screw, and a through hole is arranged at the lower end of the straight rod; two mounting ears are arranged on the upper end surface of the stamping block, and a round hole is arranged in the middle of the mounting ears, and the straight rod is placed in the middle of the two mounting ears, and the round hole and the through hole are aligned and connected by bolts and nuts.

[0013] The arc-shaped bottom is cut on the top of the rectangular steel block, and at least two mounting holes are arranged downward from the arc-shaped bottom; a pad is arranged in the center of the base, and threaded holes corresponding to the mounting holes are arranged on the pad; the arc-shaped mold is placed on the pad, and the mounting holes and the threaded holes are aligned and fastened by bolts.

[0014] A notch is arranged at the center of the upper portion of the cushion block, and the pressure sensor is arranged in the notch.

[0015] The arc length of the arc bottom is equal to or greater than the arc length of the arc surface.

[0016] The radius of the arc surface is equal to the radius of the arc-shaped steel material.

[0017] The set value is greater than the weight of the arc mold, which is 200 kg.

[0018] From the above description, it can be known that the arc steel manufacturing device provided by the present invention can press the long steel into an arc shape by cooperating with the punching block and the arc die. The punching block is controlled to rise and press down by the lifting rod. The punching block is detachably connected to the lifting rod, and the arc die is detachably connected to the base. The punching block and the arc die can be replaced as needed. The present invention makes the bending of steel convenient, the bending shape is smooth, and arc steel with different bending shapes can be punched out, thereby improving the production efficiency of arc steel and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of a curved steel material manufacturing device according to an embodiment of the present invention;

[0021] Figure 2 is a side view of a curved steel material manufacturing device according to an embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the use of the arc steel manufacturing device according to an embodiment of the present invention;

[0023] Figure 4 A side view of the arc steel material manufacturing device according to an embodiment of the present invention;

[0024] Among them, 1-support frame, 11-base, 12-top plate, 13-support rod, 14-thread hole;

[0025] 2-stamping member, 21-lifting rod, 211-screw, 212-straight rod, 22-stamping block, 221-mounting ear, 23-worm gear, 24-worm, 241-connecting rod, 25-bearing seat, 26-motor assembly, 261-rotating motor, 262-first pulley, 263-second pulley, 264-belt;

[0026] 3-mold component, 31-arc mold, 311-arc bottom, 312-side plate, 313-mounting hole, 32-pad, 321-threaded hole;

[0027] 4-Steel;

[0028] 5-pressure sensor, 6-notch;

[0029] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0030] The present invention can be subjected to various changes and can have various embodiments, and specific embodiments are illustrated and described in the accompanying drawings. However, the present invention is not limited to the specific implementation, and all changes, equivalents and substitutes falling within the concept and technical scope of the present invention are included, and should be understood to be included.

[0031] Ordinal terms such as first, second, etc. may be used to describe various constituent elements, but the constituent elements are not limited to the terms. The terms are only used to distinguish one constituent element from another constituent element. For example, without departing from the scope of the claims of the present invention, the second constituent element may be named as the first constituent element, and similarly, the first constituent element may be named as the second constituent element. The terms and / or include a combination of multiple associated items or a certain item among multiple associated items.

[0032] It should be understood that when a certain component is mentioned to be "connected" or "contacted" with other components, this includes not only the case where it is directly connected or contacted with other components, but also the case where other components exist in between. Conversely, when a certain component is mentioned to be "directly connected" or "directly contacted" with other components, it should be understood that there are no other components in between.

[0033] In the description of the embodiments, when it is described that a certain component is formed "on or under" another component, on or under includes two components directly contacting each other or at least one other component is arranged and formed between the two components. Moreover, when it is expressed as on or under, it refers to not only the upper direction but also the lower direction based on a certain component.

[0034] The terms used in this application are only used to illustrate specific embodiments and are not intended to limit the present invention. Unless the context clearly provides otherwise, singular expressions include plural expressions. In this application, it should be understood that terms such as "including" or "having" are used to specify the presence of features, numbers, steps, operations, constituent elements, parts or combinations thereof recorded in the specification, and do not preclude the presence or additional possibility of one or more other features, numbers, steps, operations, constituent elements, parts or combinations thereof.

[0035] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as those generally understood by those skilled in the art. Terms defined in commonly used dictionaries should be interpreted as having the same meaning as in the context of the relevant technology, and if not clearly defined in this application, they should not be interpreted as ideal or overly formal meanings.

[0036] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] like Figure 1-Figure 4 As shown together, the arc-shaped steel manufacturing device proposed in this embodiment can be used to bend long straight steel into an arc shape. The long straight steel can be steel sections, steel plates, and channel steels.

[0038] No matter it is a curved beam, an arch frame or a circular ring beam, it can be formed by bending long straight steel materials. The curved steel material manufacturing device can be used to easily bend the steel materials.

[0039] The arc-shaped steel production device may include a support frame 1, a punching member 2 and a die member 3. The support frame 1 is used to support and position the punching member 2 and the die member 3. The die member 3 and the punching member 2 are used in conjunction with each other. The punching member 2 is used to apply downward pressure, and the die member 3 is used to receive the pressure of the punching member 2. The straight steel 4 is placed on the top of the die member 3, the punching member 2 is pressed down on the steel 4, and the die member 3 holds the steel 4 and the punching member 2 to bend the steel 4 into shape.

[0040] In this embodiment, in order to stably support the mold component 3 and the stamping component 2, the support frame 1 may include a base 11 and a top plate 12. Support rods 13 are provided at the four corners of the base 11, and the upper ends of the four support rods 13 support the top plate 12.

[0041] The base 11 is used to fix the mold component 3, the top plate 12 is used to fix the stamping component 2, and four support rods 13 stably support the base 11 and the top plate 12. The distance between the base 11 and the top plate 12 is sufficient to separate the stamping component 2 and the mold component 3, ensuring that the placement and removal of the steel 4 is convenient and ensuring that the stamping component 2 can apply pressure to the mold component 3.

[0042] Specifically, the stamping component 2 may include a lifting rod 21 penetrating the middle of the top plate 12 , and a stamping block 22 is detachably connected to the lower end of the lifting rod 21 , and the lower end surface of the stamping block 22 is a curved surface.

[0043] The lifting rod 21 can move up and down in the middle of the top plate 12, and the middle of the top plate 12 also has a vertical limit function for the lifting rod 21. The punching block 22 rises and presses down following the movement of the lifting rod 21, and the lifting rod 21 provides the driving force for punching.

[0044] The punching block 22 can be made of a rectangular steel block, the lower end surface of which is cut into an arc surface, and the arc surface contacts the upper surface of the steel material 4 during punching.

[0045] Specifically, the mold component 3 may include a detachable arc mold 31 disposed on the base 11 , and the arc mold 31 includes an arc bottom 311 and a side plate 312 disposed on an arc side of the arc bottom 311 .

[0046] The arc die 31 is directly below the punch block 22, and the punch block 22 can be lowered into the arc die 31. In order to make the punched steel 4 bend smoothly, the arc bottom 311 of the arc die 31 has the same radius as the arc surface of the punch block 22, and the arc surface of the punch block 22 and the arc bottom 311 of the arc die 31 can fit together. The two side plates 312 of the arc die 31 are located on both sides of the punch block 22, and the arc midline of the arc surface and the arc midline of the arc bottom 311 are on the same vertical plane. The two side plates 312 can limit the displacement of the steel 4 during the punching process and limit the steel 4.

[0047] In order for the punching block 22 to enter the arc mold 31, the width of the arc surface is not greater than the inner width of the arc bottom, and the arc length of the arc surface may not be greater than the arc length of the arc steel. If the arc length of the arc steel to be punched is exactly the same as the arc length of the arc surface of the punching block 22, the arc steel can be punched in one time, and the radius of the arc steel is equal to the radius of the arc surface of the punching block 22; if the arc length of the arc steel is longer, the steel 4 can be punched step by step until the required arc length of the arc steel is punched, and the radius of the entire arc steel meets the radius of the arc surface of the punching block 22. Furthermore, the steel 4 can be punched into a circular ring, and the radius of the circular ring meets the radius of the arc surface of the punching block 22.

[0048] In order to punch out curved steel materials with different curved shapes, punching blocks 22 with different curved surfaces and arc dies 31 matched therewith can be designed, and the punching blocks 22 and arc dies 31 can be replaced according to the radius arc length of the required curved steel materials. The punching block 22 is detachably connected to the lifting rod 21 for easy replacement of the punching block 22, and the arc dies 31 are detachably connected to the base 11 for easy replacement of the arc dies 31.

[0049] In order to facilitate the movement of the lifting rod, the lifting rod is driven to rise and fall by a motor assembly. In order to avoid excessive pressure applied by the punch block 22, which may damage the steel 4 and the mold component 3 below, a pressure sensor 5 is arranged between the base 11 and the arc mold 31. The pressure sensor 5 is electrically connected to the motor assembly 26 through a controller. When the pressure value detected by the pressure sensor 5 is greater than the set value, the controller controls the motor assembly 26 to drive the lifting rod 21 to rise above the arc mold 31.

[0050] When the punch block 22 is pressed down, the pressure value detected by the pressure sensor 5 increases, and when the pressure value is greater than the set value, the trigger controller controls the motor assembly 26 to drive the lifting rod 21 to rise and leave the arc mold 31, and automatically return to prevent danger caused by unlimited downward pressure. The lifting rod 21 can be set to rise to the initial position of the lifting rod, and the lifting rod 21 can also be set to retract half of its length.

[0051] In a specific embodiment of the present invention, the lifting rod 21 can be a lead screw 211, which is driven to move up and down by a worm gear. The lead screw 211 is inserted into the center of the worm wheel 23, and an internal thread matching the lead screw 211 is provided in the center of the worm wheel 23. The worm wheel 23 is driven to rotate by a worm 24. The lead screw 211 is screwed into the middle of the worm wheel 23, and the rotation of the worm wheel 23 drives the lead screw 211 to move up and down, and the rotation of the worm 24 drives the worm wheel 23 to rotate.

[0052] In a specific embodiment of the present invention, the worm wheel 23 and the worm 24 are arranged inside the support frame 1, and connecting rods 241 are connected to both ends of the worm 24. The connecting rods 241 are arranged in the bearing seat 25, and the bearing seat 25 is fixed to the lower side of the top plate 12. The connecting rods 241 are driven to rotate by the motor assembly 26. The tooth portion in the middle of the worm 24 is meshed with the worm wheel 23, and the connecting rod 241 at one end of the worm 24 is connected to the motor assembly 26, and the motor assembly 26 drives the worm 24 to rotate. In order to ensure the stable rotation of the worm 24, the connecting rods 241 at both ends of the worm 24 are installed in the bearing seat 25, and the worm 24 can rotate smoothly through the rolling bearing in the bearing seat 25. The bearing seat 25 is firmly installed on the lower side of the top plate 12. The central axis of the bearing seat 25 is parallel to one edge of the square top plate 12.

[0053] In a specific embodiment of the present invention, in order to stably install the motor assembly 26, the motor assembly 26 may include a rotating motor 261 arranged above the top plate 12, the rotating shaft of the rotating motor 261 extends horizontally out of the top plate 12 and is connected to a first pulley 262, a connecting rod 241 in the same direction as the rotating shaft extends out of the top plate 12 and is connected to a second pulley 263, and a belt 264 is connected between the first pulley 262 and the second pulley 263.

[0054] To facilitate the installation of the belt 264, the rotating shaft of the rotating motor 261 is parallel to the worm 24 and has a certain distance therebetween. The rotating motor 261 and the worm 24 can be located on both sides of the lifting rod 21 respectively. The first pulley 262 and the second pulley 263 are both located outside the top plate 12, and the belt 264 is wound around the first pulley 262 and the second pulley 263.

[0055] The rotation of the rotary motor 261 drives the first pulley 262 to rotate, and the first pulley 262 drives the second pulley 263 to rotate through the belt 264, thereby transmitting to the worm gear for deceleration, and the worm 24 drives the worm wheel 23 to rotate, thereby driving the lead screw 211 to move up and down. The speed and number of revolutions of the rotary motor 261 can be controlled to adjust the speed and number of revolutions of the worm wheel 23, thereby controlling the speed and distance of the lead screw 211 pressing down, so as to facilitate the application of downward force according to the stamping needs.

[0056] The pressure sensor 5 is connected to the rotating motor 261 through a controller, and can control the rotating motor 261 to rise.

[0057] In a specific embodiment of the present invention, a thread hole 14 adapted to the lead screw 211 is provided in the middle of the top plate 12. The thread hole 14 is coaxial with the worm wheel 23, and the lead screw 211 is inserted into both the worm wheel 23 and the thread hole 14. The lead screw 211 is absolutely vertical and will not deviate during the movement. The inner thread of the thread hole 14 first stably lifts the lead screw 211, and the worm wheel 23 then drives the lead screw 211 to move up and down. The thread hole 14 can make the worm wheel 23 run more stably.

[0058] In a specific embodiment of the present invention, the punching block 22 and the lead screw 211 can be detachably connected by bolts and nuts. A straight rod 212 can be connected to the lower end of the lead screw 211, a through hole is provided at the lower end of the straight rod 212, two mounting ears 221 are provided on the upper end surface of the punching block 22, a round hole is provided in the middle of the mounting ears 221, the straight rod 212 is placed in the middle of the two mounting ears 221, the round hole and the through hole are aligned and connected by bolts and nuts.

[0059] In order to facilitate the installation of the punching block 22, a straight rod 212 is connected to the lower end of the lead screw 211. Two mounting ears 221 are set in the middle of the upper end of the punching block 22, and the spacing between the two mounting ears 221 is the same as the outer diameter of the straight rod 212. The two mounting ears 221 sandwich the straight rod 212 in the middle, and the punching block 22 is firmly connected to the lifting rod 21 through bolts and nuts.

[0060] In a specific embodiment of the present invention, the arc mold 31 and the base 11 can be detachably connected by bolts. The arc bottom 311 is cut from the top of the rectangular steel block, and at least two mounting holes 313 are set downward on the arc bottom 311. A cushion block 32 is fixedly set in the center of the base 11, and a threaded hole 321 corresponding to the mounting hole 313 is set on the cushion block 32. The arc mold 31 is placed on the cushion block 32, and the mounting hole 313 and the threaded hole 321 are aligned and fastened by bolts.

[0061] At least two mounting holes 313 are evenly arranged on the arc bottom 311, and the mounting holes 313 penetrate the steel block. A threaded hole 321 corresponding to the mounting hole 313 is arranged on the cushion block 32, and the length of the threaded hole 321 can be about 5 cm to ensure a firm installation. Different arc molds 31 can be replaced on the cushion block 32.

[0062] In a specific embodiment of the present invention, a notch 6 is provided at the center of the upper portion of the cushion block, and a pressure sensor 5 is provided in the notch 6. The pressure sensor 5 may be a semiconductor piezoelectric impedance sensor, which forms a semiconductor deformation pressure on the surface of the sheet, and produces a piezoelectric impedance effect by deforming the sheet through an external force (pressure), thereby converting the impedance change into an electrical signal. The wire of the pressure sensor 5 may extend out of the cushion block through the wire groove at the upper portion of the cushion block, or a wireless pressure sensor may be used.

[0063] In a specific embodiment of the present invention, in order to ensure stable stamping, the arc length of the arc bottom 311 is equal to or greater than the arc length of the arc surface, and the arc mold 31 should completely support the arc surface of the stamping block 22 .

[0064] In a specific embodiment of the present invention, in order to better limit the steel 4, the spacing between the two side plates 312 can be the width of the steel 4 to be punched, or slightly larger than the width of the steel 4. The two side plates 312 can limit the steel 4, and the steel 4 will not deviate during the punching process. The side plates 312 can be curved flat plates that follow the curved bottom.

[0065] In order to punch the required bending degree in one time, the radius of the arc surface of the punching block 22 can be the radius of the arc steel to be punched. The radius of the arc surface of the punching block 22 can also be smaller than the radius of the arc steel. In actual work, the placement of the steel 4 is adjusted while punching according to the situation.

[0066] In a specific embodiment of the present invention, the set value can be set to be slightly smaller than the maximum pressure that the arc die 31 and the cushion block 32 can withstand. In this embodiment, the set value can be greater than the weight of the arc die 150kg-200kg to ensure that the equipment will not be crushed during stamping.

[0067] Directions:

[0068] When making curved steel or arch, the steel 4 used can be channel steel, and the appropriate curved die 31 and punch block 22 are selected according to the size of the channel steel. First, the straight groove of the channel steel is placed upward on the top of the curved die 31, and the worker holds the part of the channel steel outside the curved die 31, turns on the rotating motor 261, and the worm gear 23 and worm 24 are running, and the lead screw 211 moves down, so that the punch block 22 is slowly pressed on the channel steel, and the web of the channel steel is clamped between the punch block 22 and the curved die 31. The channel steel is bent into the required arc, and the rotating motor 261 is reversed to move the punch block 22 upward. If the length of the bent arc is not long enough, the channel steel is moved and pressed down again until the appropriate arc length is reached.

[0069] If it is necessary to fine-tune the bending arc of the channel steel, a pad can be added at a suitable position on the arc bottom 311 to appropriately change the arc shape of the arc die 31, which can slightly change the arc shape of the channel steel after stamping.

[0070] If it is necessary to punch arc-shaped steel materials of other sizes and shapes, the punching blocks 22 of other sizes and the matching arc-shaped dies 31 can be replaced.

[0071] The arc steel manufacturing device according to the present invention is described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the arc steel manufacturing device proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A device for producing curved steel, characterized in that: It includes a support frame, a stamping component and a mold component, wherein: The support frame comprises a base, support rods are arranged at four corners of the base, and a top plate is supported at the upper ends of the four support rods; The punching component comprises a lifting rod penetrating the middle part of the top plate, a punching block is detachably connected to the lower end of the lifting rod, and the lower end surface of the punching block is a curved surface; The mold component comprises a detachable arc mold arranged on the base, the arc mold comprises an arc bottom and a side plate arranged on the arc edge of the arc bottom, the arc bottom and the arc surface have the same radius, the arc length of the arc surface is not greater than the arc length of the arc steel to be punched, and the width of the arc surface is not greater than the inner width of the arc bottom; The lifting rod is driven to rise and fall by a motor assembly. A pressure sensor is arranged between the base and the arc mold. The pressure sensor is electrically connected to the motor assembly through a controller. When the pressure value detected by the pressure sensor is greater than a set value, the controller controls the motor assembly to drive the lifting rod to rise above the arc mold.

2. The arc steel manufacturing device according to claim 1, characterized in that: The lifting rod is a lead screw, which is passed through the center of the worm wheel. An internal thread matched with the lead screw is arranged in the center of the worm wheel, and the worm wheel is driven to rotate by the worm. Connecting rods are connected to both ends of the worm, and the connecting rods are arranged in a bearing seat. The bearing seat is fixed to the lower side of the top plate, and the motor assembly drives the connecting rods to rotate.

3. The arc steel material manufacturing device according to claim 2, characterized in that: The motor assembly comprises a rotating motor disposed above the top plate, a rotating shaft of the rotating motor horizontally extending from the top plate and connected to a first pulley, a connecting rod in the same direction as the rotating shaft extending from the top plate and connected to a second pulley, and a belt connected between the first pulley and the second pulley; The pressure sensor is connected to the rotating motor through the controller.

4. The arc steel material manufacturing device according to claim 2, characterized in that: A thread hole matched with the lead screw is arranged in the middle of the top plate.

5. The arc steel material manufacturing device according to claim 2, characterized in that: A straight rod is connected to the lower end of the lead screw, and a through hole is provided at the lower end of the straight rod; Two mounting ears are arranged on the upper end surface of the punching block, a circular hole is arranged in the middle of the mounting ears, the straight rod is placed in the middle of the two mounting ears, the circular hole and the through hole are aligned and connected by bolts and nuts.

6. The arc steel manufacturing device according to claim 1, characterized in that: The arc-shaped bottom is cut from the top of the rectangular steel block, and at least two mounting holes are arranged downward from the arc-shaped bottom; A cushion block is arranged at the center of the base, and a threaded hole corresponding to the mounting hole is arranged on the cushion block; The arc-shaped mold is placed on the cushion block, and the mounting holes and the threaded holes are aligned and fastened by bolts.

7. The arc steel material manufacturing device according to claim 6, characterized in that: A notch is arranged at the center of the upper portion of the cushion block, and the pressure sensor is arranged in the notch.

8. The arc-shaped steel material manufacturing device according to claim 1, characterized in that: The arc length of the arc bottom is equal to or greater than the arc length of the arc surface.

9. The arc steel material manufacturing device according to claim 1, characterized in that: The radius of the arc surface is equal to the radius of the arc-shaped steel material.

10. The arc-shaped steel material manufacturing device according to claim 1, characterized in that: The set value is greater than the weight of the arc mold, which is 200 kg.

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