Metal rolling device for distribution box plate production

Abstract

The invention provides a metal rolling device for distribution box plate production, and relates to the technical field of metal rolling, the metal rolling device comprises a rolling device main body and a plate pre-cutting structure, the plate pre-cutting structure comprises a bearing seat, a hydraulic push rod, a linkage frame, a tool rest, a pre-cutting tool bit, a gear motor, a driving arm, a connecting rod and a push-pull arm; a rolled metal plate is conveyed to the top of a bearing seat from a rolling device body, when a hydraulic push rod controls a linkage frame to drive a tool rest to move towards the bottom, and a gear motor is matched to control a push-pull arm to drive the bearing seat to do reciprocating motion through a driving arm, a movable seat and a connecting rod; a plurality of pre-cutting grooves at equal intervals can be punched in the long edge of a metal plate, a blank required for processing the distribution box can be directly obtained in the rolling process, the metal plate is supported to be folded at the pre-cutting grooves to form a main body of the distribution box, welding work only needs to be carried out at the folded edge connecting position in the follow-up process, and the production efficiency is greatly improved. The welding workload is reduced, and the overall strength of the distribution box is improved.

Description

Technical Field

[0001] This invention relates to the field of metal rolling technology, specifically a metal rolling apparatus for producing sheet metal for distribution boxes. Background Technology

[0002] Rolling is a plastic forming process that applies pressure to a metal billet using rotating rolls, reducing its cross-section and increasing its length. It falls under the category of metal processing and is mainly used to produce metal materials such as profiles, plates, and pipes. Based on temperature, it is divided into hot rolling (high-temperature processing) and cold rolling (room-temperature processing). The former can refine grains but is prone to residual stress, while the latter requires annealing to improve mechanical properties. According to the direction of the rolled material's movement, it can be divided into longitudinal rolling, transverse rolling, and skew rolling, corresponding to different roll rotation methods and material deformation paths.

[0003] As electrical equipment, distribution boxes are characterized by their small size, easy installation, unique technical performance, fixed location, unique configuration functions, lack of site restrictions, widespread application, stable and reliable operation, high space utilization, small footprint, and environmental benefits. A distribution box is a low-voltage distribution box constructed by assembling switching equipment, measuring instruments, protective electrical devices, and auxiliary equipment in a closed or semi-closed metal cabinet or panel according to electrical wiring requirements. During normal operation, circuits can be connected or disconnected manually or automatically. In case of faults or abnormal operation, protective electrical devices disconnect the circuit or trigger an alarm. Measuring instruments can display various operating parameters, allow adjustment of certain electrical parameters, and provide alerts or signals for deviations from normal operating conditions.

[0004] For the main body processing of the distribution box, it is necessary to first cut the sheet metal and bend it to form components such as the side panels, top panel, bottom panel, and door panel of the box. Then, the various components of the box are welded and fixed (such as welding the side panels to the bottom panel). Finally, the surface of the distribution box body is treated (such as for corrosion protection and aesthetics) to obtain the main structure of the distribution box. The sheet metal that needs to be cut for the distribution box can be produced by rolling, which is beneficial for controlling the thickness of the sheet metal.

[0005] The patent document with announcement number CN119456675B describes a processing device for rolling metal sheets. By starting a motor, the metal sheet to be rolled passes between the driven roll and the driving roll. Based on the set lead screw and stress relief mechanism, the device can adapt to the processing of metal sheets of different thicknesses. At the same time, it can eliminate the internal stress in the metal sheet, so that the reliability of the metal sheet will not be reduced due to internal stress.

[0006] However, in the process of implementing the above technical solution, the following technical problems were found: The metal sheet rolling processing device can adapt to the processing of metal sheets of different thicknesses based on the lead screw and stress relief mechanism when the sheet passes between the active and driven rolls to meet the actual use requirements. However, for the sheet used in the processing of distribution boxes, it needs to be cut into fixed sizes after forming and then welded to form the distribution box structure. The process is relatively complicated. Moreover, the two adjacent sides of the distribution box are fixed by welding independent sheet metal. As the service time goes by, the overall structural strength will be greatly reduced.

[0007] Therefore, this application proposes a metal rolling apparatus for producing sheet metal for distribution boxes to solve the above problems. Summary of the Invention To overcome the shortcomings of existing metal sheet rolling processing equipment for distribution box manufacturing, which requires cutting the sheet metal to a fixed size after forming and then welding it to form the distribution box structure, resulting in a cumbersome process and a significant decrease in overall structural strength over time due to the use of independent sheet metal welded to adjacent sides of the distribution box, this application provides a metal rolling device for the production of distribution box sheet metal. This device rolls the metal sheet between pressure rollers and support rollers. When the rolled metal sheet is moved to the top of the support base, a hydraulic push rod controls the linkage frame to drive the movement. The tool holders assembled at both ends of the plate move downwards, causing the pre-cutting heads at the bottom of the two tool holders to punch the metal sheet. In conjunction with the geared motor, the push-pull arm is controlled by the drive arm, movable seat, and connecting rod to drive the support seat to reciprocate on the top of the base under the support of the rollers at the bottom of the T-plate. This can punch out multiple equally spaced pre-cut grooves on the long side of the metal sheet, which facilitates the direct production of the blank required for the distribution box during the rolling process. The metal sheet is then folded at the pre-cut grooves to form the main body of the distribution box. Subsequent welding work is only required at the joint of the folded edges, which helps to reduce the amount of welding work and improve the overall strength of the distribution box.

[0008] The technical solution adopted by the embodiments of this application to solve its technical problem is: A metal rolling apparatus for producing sheet metal for distribution boxes includes a rolling apparatus body and a sheet metal pre-cutting structure, wherein the sheet metal pre-cutting structure is disposed on one side of the rolling apparatus body. The pre-cutting structure of the sheet metal includes a support base, and a gantry frame is assembled and connected to the two long sides of the top of the support base. A central top plate is assembled between the center of the top of the two gantry frames. A hydraulic push rod is assembled and connected to the top of the central top plate. The movable end of the hydraulic push rod passes through the interior of the central top plate and is assembled and connected to a linkage frame. A blade holder is assembled and connected to the bottom of both ends of the linkage frame. A pre-cutting blade head is inserted and connected to the bottom of the blade holder and fixed by bolts. The bottom of the support is provided with a base, and a reduction motor is provided on the side of the base away from one corner of the support. A drive arm is provided on the side of the reduction motor near the base. A connecting rod is provided at the end of the drive arm near the base and away from the reduction motor. A push-pull arm is externally rotatably connected to the end of the connecting rod away from the drive arm. The end of the push-pull arm away from the connecting rod is hinged to the side of the support. The geared motor controls the drive arm to rotate, and the drive arm controls the push-pull arm via the connecting rod to pull the support seat to move back and forth on the top of the base. The support seat supports the pre-cutting head to punch out a pre-cutting groove at the edge of the metal plate that is transferred from the main body of the rolling device to the plate pre-cutting structure.

[0009] In one possible implementation, the main body of the rolling device includes two support rollers arranged side by side in the same horizontal plane, a pressure roller is arranged between the tops of the two support rollers, and a gear assembly is arranged between one end of the two support rollers; the gear assembly is driven by a reducer connected to a motor, and causes both support rollers to roll toward the sheet metal pre-cutting structure, and the metal sheet is rolled between the pressure roller and the support roller and then moved toward the top of the support seat.

[0010] In one possible implementation, the drive arm has a slidingly connected movable seat on the side near the connecting rod, and a threaded rod is threadedly connected to the movable seat. One end of the threaded rod is integrally formed into a round rod, and an annular groove is machined on the outside of the round rod. The drive arm has a pin-connected limit block on the side away from the connecting rod, and an adapter slot is opened inside one end of the limit block. The limit block is fastened to the round rod outside the annular groove through the adapter slot.

[0011] In one possible implementation, a bushing is integrally formed on the side of the drive arm away from the connecting rod, and a motor carrier is assembled and connected to the base on the side of the geared motor; the geared motor is assembled to the top surface of the motor carrier away from the base, and one end of the geared motor passes through the internal pin of the motor carrier and is connected to the inside of the bushing.

[0012] In one possible implementation, guide rail structures are provided on both long sides of the top of the base, and each guide rail structure includes two Z-shaped steel bars arranged symmetrically on the left and right. T-plates are welded to the four corners of the bottom of the bearing seat, and rollers are assembled to the center of the bottom and both sides of the top of the T-plates. The rollers at the bottom of the T-plates are rotatably connected to the top of the base, and the rollers at the top of the two sides of the T-plates are rotatably connected to the inner top walls of the two Z-shaped steel bars, respectively.

[0013] In one possible implementation, positioning steel plates are integrally formed on the bottom sides of the two Z-shaped steel bars facing each other in a symmetrical arrangement, and the rollers at the bottom of the T-shaped plate are located between the two positioning steel plates.

[0014] In one possible implementation, an edge top plate is assembled and connected between the two top sides of the two gantry frames. Guide rods are provided inside both ends of the edge top plate, and the tool holder located on one side slides outside the two guide rods inside one edge top plate.

[0015] In one possible implementation, the guide rod has a first groove inside, the bottom center of the edge top plate has an integrally formed positioning clamp, the bottom center of the positioning clamp has a second groove, the edge top plate has two shafts connected by pins inside, the two shafts are rotatably connected to lever arms outside, the two lever arms have a third groove inside at both ends, and the top centers of the two tool holders are welded to the vertical arms. Two shafts are symmetrically arranged on both sides of the second groove. A long rod is pinned to the top of the upright arm and is movably connected to the inside of the second groove. A short rod is pinned to the inside of the guide rod. Two lever arms are symmetrically arranged on both sides of the second groove and are connected to the inside of the top of the upright arm. A long rod passes through the inside of the lever arm. The end of the lever arm away from the upright arm extends into the inside of the first groove and is passed through the inside of the lever arm by a short rod.

[0016] In one possible implementation, the top of both ends of the support is provided with a discharge slot, and the bottom of the two discharge slots is provided with a guide bucket; the top of the guide bucket is assembled and fixed to the support, the two support are symmetrically arranged and both face the center of the base, the two discharge slots are respectively located directly below the two pre-cutting heads, and after the pre-cutting heads punch out a pre-cutting groove inside the metal plate, they release waste material into the discharge slot.

[0017] In one possible implementation, two baffles are welded to the top of the base, and a scrap pusher is assembled to the bottom of the bearing seat near the main body of the rolling device; the two baffles are located between two guide rail structures, the scrap pusher is slidably connected between the two baffles, and the bottoms of the two guide buckets overlap the top surface of the baffles and move relative to the baffles, so that the falling scrap is guided by the two guide buckets to concentrate between the two baffles.

[0018] The beneficial effects of this application are as follows: Firstly, in this solution, the metal sheet is rolled between the pressure roller and the support roller. When the rolled metal sheet is moved to the top of the support seat, the hydraulic push rod controls the linkage frame to drive the cutter holders assembled at both ends to move to the bottom. This causes the pre-cutting cutter heads at the bottom of the two cutter holders to punch the metal sheet. With the help of the geared motor, the push-pull arm is controlled by the drive arm, movable seat, and connecting rod to drive the support seat to reciprocate at the top of the base. This can punch out multiple equally spaced pre-cut grooves on the long side of the metal sheet, which makes it easy to obtain the blank required for the distribution box processing directly during the rolling process. The metal sheet is supported to be folded at the pre-cut grooves to form the main body of the distribution box. Subsequently, welding work is only required at the joint of the folded edges, which helps to reduce the amount of welding work and improve the overall strength of the distribution box. Secondly, in this solution, after the tool holder punches a pre-cut groove on the metal sheet through the pre-cutting head, the two tool holders are controlled to return to the top and continue to move upwards by the hydraulic push rod through the linkage frame. The vertical arm at the top of the tool holder drives the long rod and simultaneously drives the two lever arms to rotate around their corresponding shafts. The lever arms apply pressure to the short rod inside the first groove, causing the guide rod to move to the bottom inside the tool holder. This makes it easy to push the waste material out from the inside of the pre-cutting head by the bottom of the guide rod. It is simple and quick and does not affect the continuous punching operation of the pre-cutting head on the metal sheet. Thirdly, in this solution, by using two guide buckets to guide the waste material falling from inside the unloading chute to the bottom, when it is concentrated between the two baffles, the push-pull arm is controlled by the movable seat and connecting rod to drive the bearing seat to reciprocate on the top of the base. The waste push plate can be used to repeatedly push the waste material that is constantly falling between the two baffles to move away from the main body of the rolling device, so as to collect the waste material. This is simple and convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a metal rolling device for producing sheet metal for distribution boxes according to the present invention. Figure 2 This is a schematic diagram of the pre-cutting structure of a metal rolling device for producing distribution box sheet metal according to the present invention. Figure 3 This is a right view of the sheet metal pre-cutting structure of a metal rolling device for producing sheet metal for distribution boxes according to the present invention. Figure 4 This is a schematic diagram of the structure between the positioning clamp and the guide column of a metal rolling device for producing sheet metal for distribution boxes according to the present invention. Figure 5 This invention relates to a metal rolling apparatus T for producing sheet metal for distribution boxes. Figure 4 Enlarged diagram of section A in the middle; Figure 6 This is a cross-sectional view of a metal rolling device support for the production of sheet metal for distribution boxes according to the present invention. Figure 7 This is a schematic diagram of the connection structure between the drive arm and the bearing seat of a metal rolling device for producing sheet metal for distribution boxes according to the present invention. Figure 8 This is a schematic diagram of the structure of a metal rolling device for producing sheet metal for distribution boxes, according to the present invention, when the drive arm is controlled by a geared motor. Figure 9 This is a cross-sectional view of the drive arm of a metal rolling device for producing sheet metal for distribution boxes according to the present invention. Figure 10 This is a plan view of a metal rolling device for producing sheet metal for distribution boxes according to the present invention.

[0020] Figure label: 1. Main body of the rolling mill; 101. Pressure roll; 102. Gear assembly; 103. Support roll; 2. Sheet metal pre-cutting structure; 201. Base; 202. Z-shaped steel bar; 203. Positioning steel plate; 204. Bearing seat; 205. Blade holder; 206. Gantry frame; 207. Hydraulic push rod; 208. Center top plate; 209. Edge top plate; 210. Pre-cutting blade; 211. Push-pull arm; 212. Connecting rod; 213. Gear motor; 214. Drive arm; 215. Baffle; 216. Scrap push plate; 217. Positioning clamp; 218. Linkage frame; 219. Guide upright; 220. Guide bucket; 221. T-plate; 222. Roller; 223. Upright arm; 224. Lever arm; 225. Bushing; 226. Motor carrier; 227. Shaft; 228. Movable seat; 229. Threaded rod; 230. Round rod; 231. Limit block; 3. Metal sheet; 4. Unloading groove; 5. First groove; 6. Second groove; 7. Third groove; 8. Fitting groove; 9. Circular groove; 10. Pre-cut groove. Detailed Implementation

[0021] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows: Example 1: This embodiment describes the specific structure of a metal rolling device for producing sheet metal for distribution boxes, as detailed in the following reference. Figures 1-3 , Figures 7 to 10As shown, the device includes a rolling mill body 1 and a plate pre-cutting structure 2 disposed on one side of the rolling mill body 1. The plate pre-cutting structure 2 includes a bearing seat 204. A gantry frame 206 is assembled and connected to the two long sides of the top of the bearing seat 204. A central top plate 208 is assembled and connected between the top centers of the two gantry frames 206. A hydraulic push rod 207 is assembled and connected to the top of the central top plate 208. The movable end of the hydraulic push rod 207 passes through the interior of the central top plate 208 and is assembled and connected to a linkage frame 218. A blade holder 205 is assembled and connected to the bottom of both ends of the linkage frame 218. A pre-cutting blade head 210 is plugged into the bottom of the blade holder 205 and fixed by bolts. A base 201 is provided at the bottom of the support 204. A geared motor 213 is provided on the side of the base 201 away from one corner of the support 204. A drive arm 214 is provided on the side of the geared motor 213 near the base 201. A connecting rod 212 is provided at the end of the drive arm 214 near the base 201 and away from the geared motor 213. A push-pull arm 211 is externally rotatably connected to the end of the connecting rod 212 away from the drive arm 214. The end of the push-pull arm 211 away from the connecting rod 212 is hinged to the side of the support 204. The main body 1 of the rolling device includes two support rollers 103 arranged side by side in the same horizontal plane. A pressure roller 101 is arranged between the tops of the two support rollers 103. A gear assembly 102 is arranged between one end of the two support rollers 103. By driving the gear assembly 102 with a reducer connected to a motor, both support rollers 103 roll toward the plate pre-cutting structure 2. When the metal plate 3 is placed between the pressure roller 101 and the support roller 103 for rolling, the rolling support roller 103 and the pressure roller 101 cooperate to move the rolled metal plate 3 toward the top of the bearing seat 204, waiting for the plate pre-cutting structure 2 to perform pre-processing work. Secondly, by activating the hydraulic push rod 207, the linkage frame 218 is controlled to drive the tool holders 205 assembled at both ends of the frame to move to the bottom, so that the pre-cutting heads 210 at the bottom of the two tool holders 205 can perform stamping work on the metal sheet 3 that is transferred to the top of the support seat 204, and two pre-cutting grooves 10 can be formed inside the metal sheet 3. Simultaneously, when the geared motor 213 controls the drive arm 214 to rotate, the drive arm 214, through the connecting rod 212, controls the push-pull arm 211 to pull the support seat 204 back and forth on the top of the base 201 (e.g., Figure 8 As shown), the pre-cutting head 210 can be supported by the bearing seat 204 to punch out two more pre-cutting grooves 10 at the edge of the metal plate 3 that is transferred from the main body 1 of the rolling device to the plate pre-cutting structure 2, which is beneficial to directly obtain the blank required for the processing of the distribution box during the rolling process. At this point, refer to the pre-processed metal sheet 3 Figure 10The cutting standard in the middle is to fold the metal plate 3 at the pre-cut groove 10 to form the main body of the distribution box. Welding is only required at the joint of the folded edges, which helps to reduce the amount of welding work and improve the overall strength of the distribution box, and has strong corrosion resistance. Furthermore, in order to fix the geared motor 213 to one corner of the base 201 so that the geared motor 213 can drive the drive arm 214 to rotate, such as Figure 3 , Figure 7 and Figure 9 As shown, a bushing 225 is integrally formed on the side of the drive arm 214 away from the connecting rod 212. The base 201 is assembled with a motor carrier 226 on the side of the geared motor 213. By assembling the geared motor 213 to the top surface of the motor carrier 226 away from the base 201, one end of the geared motor 213 passes through the internal pin of the motor carrier 226 and is connected to the inside of the bushing 225. This can support the geared motor 213 to control the rotation of the drive arm 214, so as to control the reciprocating motion of the bearing seat 204 by means of the movable seat 228, the connecting rod 212, and the push-pull arm 211. Furthermore, in order to control the distance of the reciprocating motion of the support 204 from the top of the base 201 towards the metal plate 3, such as... Figure 7 and Figure 9 As shown, a movable seat 228 is slidably connected inside the drive arm 214 near the connecting rod 212. A threaded rod 229 is threadedly connected inside the movable seat 228. One end of the threaded rod 229 is integrally formed with a round rod 230. A circular groove 9 is machined on the outside of the round rod 230. A limit block 231 is pin-connected inside the drive arm 214 away from the connecting rod 212. An adapter slot 8 is opened inside one end of the limit block 231. By having the limit block 231 fasten to the round rod 230 outside the circular groove 9 through the adapter slot 8, the movement of the threaded rod 229 along its axis inside the drive arm 214 can be restricted. This ensures that during the rotation of the round rod 230, the movable seat 228 can be controlled to slide inside the drive arm 214 to control the distance between the connecting rod 212 and the axis of rotation of the geared motor 213. In some examples, guide rail structures are provided on the two long sides of the top of the base 201. The two guide rail structures include two Z-shaped steel bars 202 arranged symmetrically on the left and right. T-plates 221 are welded to the four corners of the bottom of the bearing seat 204. Rollers 222 are assembled to the center of the bottom and the two sides of the top of the T-plates 221. In this way, by making the rollers 222 at the bottom of the T-plate 221 roll to the top of the base 201, and the rollers 222 at the top of both sides of the T-plate 221 roll to the top inner wall of the two Z-shaped steel bars 202 respectively, the movement resistance can be reduced when the support seat 204 moves on the top of the base 201. Secondly, in order to allow the support 204 to move along a fixed path on top of the base 201, such as... Figure 2 and Figure 3 As shown, the bottom sides of the two Z-shaped steel bars 202 facing each other in the symmetrical arrangement are integrally formed with positioning steel plates 203. By positioning the rollers 222 at the bottom of the T-shaped plate 221 between the two positioning steel plates 203, the support seat 204 at the top of the T-shaped plate 221 can be controlled to move along a fixed path by positioning the rollers 222 at the bottom of the T-shaped plate 221.

[0022] The above design uses a geared motor 213 to drive the rotating shaft to control the rotation of the drive arm 214 connected to the bushing 225. With the help of the movable seat 228 and the connecting rod 212, the push-pull arm 211 can be controlled to drive the bearing seat 204 to reciprocate on the top of the base 201 (supported by the roller 222 at the bottom of the T-plate 221). In this state, the roller 222 at the bottom of the T-plate 221 moves between the two Z-shaped steel bars 202 in the guide rail structure and is positioned by the positioning steel plate 203 between the two Z-shaped steel bars 202 to control the movement path of the bearing seat 204 on the top of the base 201. When the metal sheet 3 is placed between the pressure roller 101 and the support roller 103 for rolling, and the rolling support roller 103 and the pressure roller 101 cooperate to move the rolled metal sheet 3 to the top of the support seat 204, the hydraulic push rod 207 controls the linkage frame 218 to drive the cutter holders 205 assembled at both ends of the frame to move downwards. This causes the pre-cutting cutters 210 at the bottom of the two cutter holders 205 to perform a stamping operation on the metal sheet 3, which, in conjunction with the reciprocating motion of the support seat 204 on the top of the base 201, causes the metal sheet 3 to be pressed by the pre-cutting cutters 210 at the bottom of the two cutter holders 205. The sheet metal 3 is conveyed at the same speed by the support roller 103 and the pressure roller 101 (i.e., the movement speed of the sheet metal 3 is the same as the movement speed of the bearing seat 204). Multiple pre-cut grooves 10 with equal spacing can be punched out on the long side of the sheet metal 3, which makes it easy to obtain the blank required for the distribution box processing directly during the rolling process. The sheet metal 3 is supported and folded at the pre-cut grooves 10 to form the main body of the distribution box. Subsequently, welding work is only required at the joint of the folded edges, which helps to reduce the amount of welding work and improve the overall strength of the distribution box. It is simple and efficient.

[0023] Example 2: Based on Example 1, this example describes the specific structure of the pre-cut sheet structure 2, such as... Figures 1 to 5 As shown, the two gantry frames 206 are connected by an edge top plate 209 on both sides of the top, and guide rods 219 are provided inside both ends of the edge top plate 209. The guide rod 219 has a first groove 5 inside. The bottom center of the edge top plate 209 has an integrally formed positioning clamp 217. The bottom center of the positioning clamp 217 has a second groove 6. The edge top plate 209 has two pin-connected shafts 227 inside. The two shafts 227 are rotatably connected to lever arms 224 outside. The lever arms 224 have a third groove 7 inside at both ends. The top center of the two tool holders 205 is welded to the upright arm 223. The two shafts 227 are symmetrically arranged on both sides of the second groove 6. The top of the upright arm 223 is pin-connected to a long rod, and the long rod is movably connected to the inside of the second groove 6. The guide rod 219 has a short rod pin-connected inside. In this way, by making the knife holder 205 located on one side slide outside the two guide rods 219 inside an edge top plate 209, the hydraulic push rod 207 can assist the linkage frame 218 in controlling the up and down movement of the two knife holders 205, thereby improving the stability of the knife holder 205 punching the pre-cut groove 10 on the metal plate 3 through the pre-cutting head 210. Secondly, to prevent the scrap material punched off the metal sheet 3 from getting stuck inside the pre-cutting head 210, such as... Figure 2 , Figure 4 and Figure 5 As shown, two lever arms 224 are symmetrically arranged on both sides of the second groove 6 and connected to the inner side of the top of the upright arm 223. A long rod passes through its interior. The end of the lever arm 224 away from the upright arm 223 extends into the interior of the first groove 5 and is passed through its interior by a short rod. When the cutter 205 punches the pre-cut groove 10 on the metal plate 3 through the pre-cutting head 210, the hydraulic push rod 207 controls the two cutter 205 to reset to the top and continue to move to the top through the linkage frame 218. The upright arm 223 at the top of the cutter 205 drives the long rod and simultaneously drives the two lever arms 224 to rotate around their corresponding shaft 227. This allows the lever arm 224 to apply pressure to the short rod inside the first groove 5, causing the guide rod 219 to move to the bottom inside the cutter 205. Thus, the waste material is pushed out from the interior of the pre-cutting head 210 by the bottom of the guide rod 219.

[0024] The above design involves punching a pre-cut groove 10 into the metal sheet 3 using the pre-cutting head 210 on the tool holder 205. Then, based on the hydraulic push rod 207, the two tool holders 205 are controlled by the linkage frame 218 to return to the top and continue to move upward. The vertical arm 223 at the top of the tool holder 205 drives the long rod and simultaneously drives the two lever arms 224 to rotate around their corresponding shafts 227. This causes the lever arms 224 to apply pressure to the short rod inside the first groove 5, causing the guide rod 219 to move downward inside the tool holder 205. This facilitates the removal of waste material from the inside of the pre-cutting head 210 by means of the bottom of the guide rod 219, without affecting the continuous punching operation of the pre-cutting head 210 on the metal sheet 3.

[0025] Example 3: Based on Examples 1 and 2, this example describes the specific structure of the pre-cut sheet metal structure 2, such as... Figures 1 to 3 , Figure 6 As shown, the top of both ends of the bearing seat 204 is provided with a discharge slot 4, and the bottom of both discharge slots 4 is provided with a guide bucket 220. Two baffles 215 are welded to the top of the base 201, and a scrap pusher 216 is assembled and connected to the bottom of the bearing seat 204 near the main body 1 of the rolling device. The top of the guide bucket 220 is assembled and fixed to the support seat 204. The two support seats 204 are symmetrically arranged and both face the center of the base 201. The two unloading slots 4 are located directly below the two pre-cutting heads 210. When the pre-cutting head 210 punches out the pre-cut groove 10 inside the metal plate 3, the guide rod 219 pushes the waste material out to the bottom inside the pre-cutting head 210. The waste material is released to the bottom and falls into the unloading slot 4. It is then guided by the two guide buckets 220 to the center of the top of the base 201. This can prevent the waste material from accumulating on the top of the support seat 204 and affecting the continuous punching operation. Secondly, the two baffles 215 are located between the two guide rail structures (see Embodiment 1 for a related introduction to the guide rail structures), and the waste pusher plate 216 is slidably connected between the two baffles 215. The bottoms of the two guide buckets 220 overlap the top surface of the baffles 215 and move relative to the baffles 215. The waste material falling is guided by the two guide buckets 220 to concentrate between the two baffles 215. When the geared motor 213 drives the rotating shaft to control the drive arm 214 connected to the bushing 225 to rotate, and the push-pull arm 211 is controlled by the movable seat 228 and the connecting rod 212 to drive the bearing seat 204 to reciprocate on the top of the base 201, the waste pusher plate 216 can be used to repeatedly push the waste material that is constantly falling between the two baffles 215 to move away from the main body 1 of the rolling device (similar to the coin pusher state of an arcade coin pusher), which facilitates the collection of waste material.

[0026] The above design uses two guide buckets 220 to guide the waste material falling from the inside of the unloading trough 4 to the bottom. When the waste material is concentrated between the two baffles 215, the push-pull arm 211 is controlled by the movable seat 228 and the connecting rod 212 to drive the bearing seat 204 to reciprocate on the top of the base 201. The waste material pusher plate 216 can be used to repeatedly push the waste material that is continuously falling between the two baffles 215 to the side away from the main body 1 of the rolling device, which is convenient for the collection of waste material.

[0027] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A metal rolling apparatus for producing sheet metal for distribution boxes, characterized in that, include: Rolling equipment body (1); The sheet metal pre-cutting structure (2) is located on one side of the main body (1) of the rolling device; The pre-cutting structure (2) of the plate includes a support base (204). A gantry frame (206) is assembled and connected to the two long sides of the top of the support base (204). A central top plate (208) is assembled between the top centers of the two gantry frames (206). A hydraulic push rod (207) is assembled and connected to the top of the central top plate (208). The movable end of the hydraulic push rod (207) passes through the interior of the central top plate (208) and is assembled and connected to a linkage frame (218). A knife holder (205) is assembled and connected to the bottom of both ends of the linkage frame (218). A pre-cutting knife head (210) is plugged into the bottom of the knife holder (205) and fixed by bolts. The bottom of the support (204) is provided with a base (201). A geared motor (213) is provided on the side of the base (201) away from one corner of the support (204). A drive arm (214) is provided on the side of the geared motor (213) close to the base (201). A connecting rod (212) is provided at the end of the drive arm (214) close to the base (201) and away from the geared motor (213). A push-pull arm (211) is externally rotatably connected to the end of the connecting rod (212) away from the drive arm (214). The end of the push-pull arm (211) away from the connecting rod (212) is hinged to the side of the support (204). The geared motor (213) controls the drive arm (214) to rotate, so that the drive arm (214) controls the push-pull arm (211) to pull the support seat (204) to reciprocate on the top of the base (201) via the connecting rod (212). The support seat (204) supports the pre-cutting head (210) to punch out a pre-cutting groove (10) at the edge of the metal plate (3) that is transferred from the rolling device body (1) to the plate pre-cutting structure (2).

2. The metal rolling apparatus for producing sheet metal for distribution boxes as described in claim 1, characterized in that: The main body (1) of the rolling device includes two support rollers (103) arranged side by side in the same horizontal plane, a pressure roller (101) is provided between the tops of the two support rollers (103), and a gear assembly (102) is provided between one end of the two support rollers (103). The gear assembly (102) is driven by a reducer connected to a motor, and both support rollers (103) roll toward the pre-cut sheet structure (2). The metal sheet (3) is rolled between the pressure roller (101) and the support roller (103) and then moved toward the top of the support seat (204).

3. The metal rolling apparatus for producing sheet metal for distribution boxes as described in claim 1, characterized in that: The drive arm (214) has a sliding connection to a movable seat (228) on the side near the connecting rod (212). The movable seat (228) has a threaded connection to a threaded rod (229). One end of the threaded rod (229) is integrally formed with a round rod (230). The round rod (230) has an annular groove (9) machined on its exterior. The drive arm (214) has a pin-connected connection to a limiting block (231) on the side away from the connecting rod (212). One end of the limiting block (231) has an adapter slot (8) inside. The limiting block (231) is fastened to the outside of the annular groove (9) of the round rod (230) through the adapter slot (8).

4. The metal rolling apparatus for producing sheet metal for distribution boxes as described in claim 1, characterized in that: The drive arm (214) has an integrally formed bushing (225) on the side away from the connecting rod (212), and the base (201) is assembled with a motor carrier (226) on the side of the geared motor (213). The geared motor (213) is mounted on the top surface of the motor carrier (226) away from the base (201), and one end of the geared motor (213) passes through the inside of the motor carrier (226) and is pinned to the inside of the bushing (225).

5. A metal rolling apparatus for producing sheet metal for distribution boxes as described in claim 1, characterized in that: The base (201) has guide rail structures on its two long sides at the top. Each guide rail structure includes two Z-shaped steel bars (202) arranged symmetrically on the left and right. T-plates (221) are welded to the four corners of the bottom of the bearing seat (204). Rollers (222) are assembled to the center of the bottom and the two sides of the top of the T-plates (221). The rollers (222) at the bottom of the T-plate (221) are connected to the top of the base (201) in a rolling manner, and the rollers (222) at the top of both sides of the T-plate (221) are connected to the top inner walls of the two Z-shaped steel bars (202) in a rolling manner.

6. A metal rolling apparatus for producing sheet metal for distribution boxes as described in claim 5, characterized in that: The two Z-shaped steel bars (202) in the symmetrical arrangement have a positioning steel plate (203) integrally formed on the bottom side facing each other, and the roller (222) at the bottom of the T-shaped plate (221) is located between the two positioning steel plates (203).

7. A metal rolling apparatus for producing sheet metal for distribution boxes as described in claim 1, characterized in that: Both sides of the top of the two gantry frames (206) are connected by an edge plate (209). The edge plate (209) has guide rods (219) inside both ends. The knife holder (205) located on one side slides outside the two guide rods (219) inside the edge plate (209).

8. A metal rolling apparatus for producing sheet metal for distribution boxes as described in claim 7, characterized in that: The guide rod (219) has a first groove (5) inside. The bottom center of the edge top plate (209) is integrally formed with a positioning clamp (217). The bottom center of the positioning clamp (217) has a second groove (6). The edge top plate (209) is internally connected with two shafts (227) by pins. The two shafts (227) are rotatably connected to lever arms (224) on the outside. The lever arms (224) have a third groove (7) inside both ends. The top center of the two tool holders (205) is welded with an arm (223). Among them, the two shafts (227) are symmetrically arranged on both sides of the second groove (6), the top of the vertical arm (223) is pinned to a long rod, and the long rod is movably connected to the inside of the second groove (6), and the inside of the guide rod (219) is pinned to a short rod. The two lever arms (224) are symmetrically arranged on both sides of the second groove (6) and connected to the inside of the top of the upright arm (223). A long rod passes through its interior. The end of the lever arm (224) away from the upright arm (223) extends into the interior of the first groove (5) and is passed through its interior by a short rod.

9. A metal rolling apparatus for producing sheet metal for distribution boxes as described in claim 5, characterized in that: The top of both ends of the bearing seat (204) is provided with a discharge slot (4), and the bottom of both discharge slots (4) is provided with a guide bucket (220). The top of the guide bucket (220) is fixedly assembled with the support seat (204). The two support seats (204) are symmetrically arranged and both face the center of the base (201). The two unloading slots (4) are located directly below the two pre-cutting heads (210). After the pre-cutting head (210) punches out the pre-cutting groove (10) inside the metal plate (3), it releases waste material into the unloading slot (4).

10. A metal rolling apparatus for producing sheet metal for distribution boxes as described in claim 9, characterized in that: Two baffles (215) are welded to the top of the base (201), and a scrap pusher (216) is assembled and connected to the bottom of the bearing seat (204) near the side of the rolling device body (1). Among them, the two baffles (215) are located between the two guide rail structures, the waste pusher (216) is slidably connected between the two baffles (215), and the bottoms of the two guide buckets (220) overlap the top surface of the baffles (215) and move relative to the baffles (215). The waste that falls is guided by the two guide buckets (220) to concentrate between the two baffles (215).

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