Numerical control hoop forming machine

Abstract

The utility model relates to the field of hoop production technology discloses numerical control hoop forming machine, including punching mechanism and forming mechanism, the punching mechanism upper end one side fixedly set up with the correction mechanism, the forming mechanism sets up in the punching mechanism far from the correction mechanism one side, the punching mechanism includes main support frame, the main support frame inside upper end fixedly set up with a plurality of lower cushion block, one upper end of one of a plurality of lower cushion blocks is close to the correction mechanism one side and is provided with the limit block, one upper end of one of a plurality of lower cushion blocks is far from the correction mechanism one side and is provided with cutting tool, three upper ends of one of a plurality of lower cushion blocks are close to the middle and are provided with different specifications punching block, in the utility model, through integrated continuous production, reduce transmission time and manual intervention, multi-specification adaptation, convenient die change, accurate positioning, guarantee processing accuracy and efficiency, reduce cost and risk.

Description

Technical Field

[0001] This utility model relates to the field of hoop production technology, and in particular to a CNC hoop forming machine. Background Technology

[0002] Fasteners, widely used in power, construction, and pipeline installation, have long faced the dual challenges of efficiency and precision in their production and processing. Current technologies for fastener manufacturing often employ segmented processing techniques, requiring multiple steps such as raw material straightening, punching, cutting, and forming. Each step typically relies on independent equipment, resulting in the following technical drawbacks:

[0003] Process fragmentation leads to inefficiency: In traditional production lines, after steel strip straightening, it needs to be manually transferred to the punching equipment, and after punching, it is transferred to the forming machine. The connection between processes relies on manual operation, which not only prolongs the production cycle (the processing efficiency is usually only 3-5 pieces / minute), but also increases labor intensity and the risk of workplace injuries. Although some automated equipment automates a single process, the material transfer between processes is still interrupted, making it difficult to form a continuous assembly line operation.

[0004] Insufficient straightening and processing accuracy: Existing straightening mechanisms mostly use single-roller or tension straightening methods, which easily produce wavy defects in the middle or at the edges of steel strips with a thickness of 0.5-1.5mm. The residual stress after straightening causes deformation and displacement during subsequent punching and forming. At the same time, traditional punching mechanisms are mostly equipped with punches of a single specification, which cannot meet the requirements of different hole diameters. When changing molds, the machine must be stopped for adjustment, further reducing production efficiency.

[0005] Large forming positioning error: During the forming stage, the lack of a precise positioning device when the workpiece is transferred to the stamping station, relying solely on manual alignment or simple stop blocks for limiting, results in a circumferential accuracy error of the clamp often exceeding ±1mm, which cannot meet the requirements of high-precision applications such as power engineering. In addition, the stamping and auxiliary positioning actions of the existing equipment are not synchronized, which easily causes workpiece slippage and affects the consistency of forming.

[0006] Therefore, those skilled in the art have provided a CNC clamp forming machine to solve the problems mentioned in the background art. Utility Model Content

[0007] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a CNC hoop forming machine. Through integrated continuous production, it reduces transmission time and manual intervention; it is adaptable to multiple specifications, facilitates mold changing, and provides precise positioning, ensuring processing accuracy and efficiency while reducing costs and risks.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A CNC clamp forming machine includes a punching mechanism and a forming mechanism. A straightening mechanism is fixedly installed on one side of the upper end of the punching mechanism, and the forming mechanism is located on the side of the punching mechanism away from the straightening mechanism.

[0010] The punching mechanism includes a main support frame. Multiple lower pads are fixedly arranged at the upper end of the main support frame. A limit block is provided at the upper end of one of the lower pads near the straightening mechanism. A cutting tool is provided at the upper end of one of the lower pads away from the straightening mechanism. Punching blocks of different specifications are provided at the upper ends of the three lower pads near the middle. Upper pads are provided at the upper ends of the limit block, the cutting tool, and the multiple punching blocks. Multiple power cylinders are arranged through the upper end of the main support frame. The lower output ends of the multiple power cylinders are respectively connected to the upper ends of the multiple upper pads.

[0011] The forming mechanism includes a stamping frame, a steel conveyor belt at the rear end of the stamping frame, a stamping cylinder through the middle of the upper end of the stamping frame, a lifting frame fixedly installed at the lower end of the stamping cylinder, a forming mold fixedly installed at the middle of the lower end of the lifting frame, and two stamping pads fixedly installed at the bottom inside the stamping frame.

[0012] Furthermore, the correction mechanism includes a front connecting frame, in which multiple correction rollers are rotatably arranged, and a first drive box is fixedly arranged at the front end of the front connecting frame. The first drive box is connected to the multiple correction rollers and drives them to rotate.

[0013] Furthermore, multiple feeding rollers are rotatably arranged on one side inside the front connecting frame, and multiple first adjusting wheels are rotatably arranged on the upper end of the front connecting frame to adjust the spacing of the multiple straightening rollers.

[0014] Furthermore, a rear connecting frame is fixedly installed on one side of the main support frame, and a limit post is threaded through the interior of the rear connecting frame. A discharge frame is fixedly installed inside the opening on the side of the main support frame near the lower end of the limit post. Multiple discharge rollers are rotatably installed inside the discharge frame, and the lower end of the discharge frame is located at the upper end of one side of the steel belt conveyor.

[0015] Furthermore, an auxiliary cylinder is fixedly installed on the upper end of one of the two stamping pads, and a stop bar is fixedly installed on the upper end of the other.

[0016] Furthermore, a side baffle is fixedly installed on one side of the rear end of the steel belt conveyor, and a rear drive frame is fixedly installed at the rear end of the steel belt conveyor. Two displacement slide rods are fixedly installed inside the sliding end of the rear drive frame, and a push frame is fixedly installed at the front end of the two displacement slide rods.

[0017] Furthermore, an adjustment limit frame is fixedly installed on the upper end of the main support frame near the side of the multiple lower pads, and two pulleys are slidably installed on the upper end of the multiple adjustment limit frames to clamp and limit the material in the middle.

[0018] Furthermore, a second drive box is provided at the upper end of the main support frame near one side. Each power output end of the second drive box is equipped with a power roller, and multiple second adjusting wheels are provided at the upper end of the second drive box to adjust the spacing of the power rollers.

[0019] This utility model has the following beneficial effects:

[0020] 1. The CNC clamp forming machine proposed in this utility model achieves high-precision production through a three-level precision control mechanism. The straightening mechanism adopts multiple sets of adjustable straightening rollers (in conjunction with the first adjusting wheel), and eliminates residual stress in the steel strip through continuous roller pressing and tension superposition, effectively improving the flatness of the steel strip. The punching mechanism is equipped with punching blocks of various specifications, which are clamped and positioned by the pulleys of the adjusting limit frame to ensure the stability of the hole diameter size, and the hole diameter specification can be switched without stopping the machine. In the forming stage, the dual positioning of the auxiliary cylinder and the stop bar, combined with the rigid push of the push frame, greatly reduces the positioning deviation of the workpiece during stamping, and ultimately ensures that the circumferential accuracy of the clamp meets the requirements of high-precision installation.

[0021] 2. The CNC clamp forming machine proposed in this utility model breaks through the bottleneck of traditional process segmentation through an integrated structural design: the straightening mechanism, punching mechanism, and forming mechanism are arranged sequentially along the steel belt conveyor path, and the material is continuously transferred by the power roller and the steel belt conveyor. Combined with the PLC control system, the actions of each power cylinder are linked to form a seamless production line of "straightening-punching-cutting-forming". Compared with traditional segmented production, this equipment significantly improves processing efficiency and can achieve long-term continuous operation, greatly increasing daily output; at the same time, it reduces manual intervention, significantly reduces the risk of workplace injuries, and shortens the equipment investment payback period. Attached Figure Description

[0022] Figure 1 This is an axonometric view of the present invention;

[0023] Figure 2 This is an isometric view of the straightening mechanism and the punching mechanism of this utility model;

[0024] Figure 3 This is an isometric view of the punching mechanism of this utility model;

[0025] Figure 4 This is an isometric view of the molding mechanism of this utility model;

[0026] Figure 5 This is an axial side view of the molding mechanism of this utility model.

[0027] Legend:

[0028] 1. Straightening mechanism; 2. Punching mechanism; 3. Forming mechanism; 101. Front connecting frame; 102. Straightening roller; 103. First adjusting wheel; 104. First drive box; 105. Feed roller; 201. Main support frame; 202. Lower pad block; 203. Adjusting limit frame; 204. Upper pad block; 205. Second drive box; 206. Second adjusting wheel; 207. Power cylinder; 208. Limit block; 209. 210. Punching block; 211. Rear connecting frame; 212. Limiting post; 213. Discharge roller; 214. Discharge rack; 305. Stamping frame; 306. Stamping cylinder; 307. Lifting frame; 308. Stop bar; 309. Forming mold; 3000. Stamping pad; 301. Auxiliary cylinder; 302. Steel belt conveyor; 303. Side baffle; 310. Rear drive frame; 311. Push frame; 312. Displacement slide bar. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 1-5 An embodiment of this utility model is provided: a CNC clamp forming machine, including a punching mechanism 2 and a forming mechanism 3. A straightening mechanism 1 is fixedly provided on one side of the upper end of the punching mechanism 2, and the forming mechanism 3 is provided on the side of the punching mechanism 2 away from the straightening mechanism 1.

[0031] Specifically, through the linear arrangement of the three mechanisms, a continuous production path of "correction-processing-forming" is formed, allowing materials to complete the entire process flow without manual transfer. Correction mechanism 1 pre-processes the raw materials to ensure consistency in subsequent processing benchmarks; punching mechanism 2 completes hole processing and fixed-length cutting to provide qualified blanks for forming; forming mechanism 3 realizes the final shape processing. The three mechanisms work together to ensure production continuity, and the integrated layout reduces material transfer time, saving more than 30% of intermediate time compared to traditional separate equipment. The spacing between each mechanism is optimized according to the material transfer speed, with the center distance between adjacent mechanisms being 1.2m, which is suitable for a production cycle of 8-10 pieces / minute.

[0032] The punching mechanism 2 includes a main support frame 201. Five lower pads 202 (made of 45# steel, hardness HRC40-45) are fixedly installed at the upper end of the main support frame 201. One of the lower pads 202, closer to the straightening mechanism 1, has a limit block 208 at its upper end (limiting surface perpendicularity ≤0.02mm). One of the lower pads 202, furthest from the straightening mechanism 1, has a cutting tool at its upper end (cutting edge sharpness Ra0.8μm, shearing force ≥50kN). The three lower pads 202 closest to the center each have punching blocks 209 of different specifications at their upper ends (hole diameters φ8mm, φ10mm, and φ12mm, punch hardness HRC55-60). Upper pads 204 are installed at the upper ends of the limit block 208, the cutting tool, and the punching blocks 209. The clearance between the upper support frame 201 and the lower pad 202 is 0.01-0.03mm. Five power cylinders 207 (cylinder diameter φ63mm, stroke 100mm, working pressure 0.6-0.8MPa) are installed through the upper end of the main support frame 201. The lower output ends of the multiple power cylinders 207 are connected to the upper ends of multiple upper pads 204 respectively. A second drive box 205 (output power 1.5kW, speed adjustable range 50-200r / min) is installed at the upper end of the main support frame 201 near one side. The power output end of the second drive box 205 is equipped with a power roller (diameter φ50mm, surface roughness Ra1.6μm). Two second adjusting wheels 206 are installed at the upper end of the second drive box 205 to adjust the spacing of the power rollers (adjustment range 0.5-2mm, adaptable to steel strips of different thicknesses).

[0033] Specifically, the lower pad 202 and the upper pad 204 form a rigid machining reference. The power cylinder 207 drives the upper pad 204 to press down, and the punching block 209 and the cutting tool cooperate to realize the hole processing and cutting of the material. The limiting block 208 restricts the position of the front end of the material to ensure the dimensional accuracy of the hole position and the cutting length. The second drive box 205 drives the material to step and be conveyed through the power roller with a transmission accuracy of ±0.1mm. The multi-specification punching block 209 realizes the hole diameter switching without stopping the machine to change the mold, and adapts to different clamp connection requirements. The response time of the power cylinder 207 is ≤0.2s to ensure the processing rhythm. The second adjusting wheel 206 can accurately adjust the distance between the power rollers according to the thickness of the steel strip (0.5-1.5mm) to avoid material slippage or damage.

[0034] A rear connecting frame 210 is fixedly installed on one side of the main support frame 201. A limit post 211 (diameter φ20mm, adjustment stroke 50mm, positioning accuracy ±0.05mm) is threaded through the interior of the rear connecting frame 210. A discharge frame 213 (tilt angle 30°) is fixedly installed inside the opening on the side of the main support frame 201 near the lower end of the limit post 211. Six discharge rollers 212 (diameter φ30mm, spacing 50mm) are rotatably installed inside the discharge frame 213. The lower end of the discharge frame 213 is located at the upper end of one side of the steel belt conveyor 308 (drop ≤10mm).

[0035] Specifically, the extension length of the limiting post 211 is adjusted by the thread, and it cooperates with the limiting block 208 to limit the material cutting length (adjustment range 50-300mm); the cut workpiece slides down the discharge rack 213, and the discharge roller 212 reduces resistance through rolling friction to avoid scratches on the workpiece surface. The dual positioning of the limiting post 211 and the limiting block 208 ensures that the cutting length error is ≤0.1mm; the inclined design of the discharge rack 213 cooperates with the discharge roller 212 to realize automatic transmission of the workpiece without power, reducing energy consumption while ensuring smooth transmission.

[0036] An adjustable limit frame 203 is fixedly installed on the upper end of the main support frame 201 near the side of the multiple lower pads 202. Two pulleys (diameter φ25mm, material nylon, hardness HB200) are slidably installed on the upper end of the multiple adjustable limit frames 203, which can clamp and limit the material in the middle (the clamping gap is 0.5mm larger than the width of the material).

[0037] Specifically, the pulleys on both sides form a guide channel to limit the lateral deviation of the material during the transmission process; the pulleys can move laterally along the adjustable limit frame 203 through the sliding structure (adjustment range 0-50mm), adapting to steel belts of different widths (20-70mm). The nylon pulleys have both rigidity and wear resistance, which not only avoids scratching the surface of the steel belt (the surface roughness is maintained above Ra1.6μm), but also provides stable guidance; the precise control of the clamping gap ensures that the lateral deviation of the material is ≤0.05mm, guaranteeing the accuracy of the subsequent punching position.

[0038] The forming mechanism 3 includes a stamping frame 301. A steel conveyor belt 308 (300mm wide, 0.5-1m / s speed) is installed at the rear end of the stamping frame 301. A stamping cylinder 302 (100mm diameter, 150mm stroke, 0.8MPa working pressure, 100kN maximum stamping force) is installed through the middle of the upper end of the stamping frame 301. A lifting frame 303 is fixedly installed at the lower end of the stamping cylinder 302. A forming mold 305 (forming radius R20-R100mm, replaceable) is fixedly installed at the middle of the lower end of the lifting frame 303. Two stamping pads 306 (100-200mm spacing, 0.1mm clearance with the forming mold 305) are fixedly installed at the bottom inside the stamping frame 301. 06 One of the upper ends is fixedly equipped with an auxiliary cylinder 307 (cylinder diameter φ40mm, stroke 50mm, thrust 5kN), and the other upper end is fixedly equipped with a baffle 304 (positioning surface flatness ≤0.02mm). A side baffle 309 (height 50mm, gap with the conveyor belt ≤1mm) is fixedly installed on one side of the rear end of the steel belt conveyor 308. A rear drive frame 310 (driven by a servo motor, positioning accuracy ±0.01mm) is fixedly installed at the rear end of the steel belt conveyor 308. Two displacement slide rods 312 (diameter φ20mm, parallelism ≤0.03mm / m) are fixedly installed at the sliding end inside the rear drive frame 310. A push frame 311 (push surface perpendicularity ≤0.02mm) is fixedly installed at the front end of the two displacement slide rods 312.

[0039] Specifically, the steel conveyor belt 308 transports the workpiece to the stop bar 304 for initial positioning. The rear drive frame 310, through the displacement slide bar 312, drives the push frame 311 to push the workpiece between the stamping pads 306. The auxiliary cylinder 307 extends to press the workpiece against the stop bar 304, achieving final positioning before forming. The stamping cylinder 302 drives the lifting frame 303 to descend. The forming mold 305 cooperates with the stamping pads 306 to press the workpiece into a clamp shape. The side baffle 309 prevents the workpiece from falling laterally during transport. The servo drive of the rear drive frame 310 and the rigid guide of the displacement slide bar 312 ensure the pushing position accuracy is ±0.03mm. The dual positioning of the auxiliary cylinder 307 and the stop bar 304 ensures that the forming symmetry error is ≤0.1mm. The forming mold 305 can be quickly replaced (replacement time ≤5 minutes) to adapt to the production of clamps of different specifications.

[0040] The straightening mechanism 1 includes a front connecting frame 101, inside which seven straightening rollers 102 (diameter φ80mm, roller surface hardness HRC50-55, spacing 100mm) are rotatably arranged. A first drive box 104 (output power 2.2kW, speed 150r / min) is fixedly arranged at the front end of the front connecting frame 101. The first drive box 104 is connected to the multiple straightening rollers 102 and drives them to rotate. Three feed rollers 105 (diameter φ60mm, surface covered with rubber layer, friction coefficient 0.8) are rotatably arranged on one side inside the front connecting frame 101. Three first adjusting wheels 103 are rotatably arranged at the upper end of the front connecting frame 101 to adjust the spacing of the multiple straightening rollers 102 (adjustment accuracy 0.01mm, adaptable to steel strip thickness 0.5-1.5mm).

[0041] Specifically, the feed roller 105 guides the steel strip into the straightening mechanism 1. The first drive box 104 drives the straightening roller 102 to perform multiple passes of roller straightening on the steel strip. The spacing between the upper and lower straightening rollers 102 is adjusted by the first adjusting wheel 103, and a gradual straightening force is applied to eliminate residual stress. Multiple sets of straightening rollers 102 form a continuous straightening path. With the spacing adjustment of 0.01mm accuracy, the flatness error of the steel strip is ≤0.1mm / m. The rubber layer feed roller 105 ensures driving force while avoiding scratching the surface of the steel strip, making it suitable for processing steel strips with surface treatments such as galvanization.

[0042] Working principle: The steel strip is fed into the straightening mechanism 1 via the feed roller 105. The first drive box 104 drives multiple sets of straightening rollers 102 to rotate. The roller spacing is adjusted by the first adjusting wheel 103, applying a composite straightening force to the steel strip. The bending stress and tension are superimposed to eliminate wavy defects and achieve flattening treatment. The straightened steel strip is then driven by the power rollers by the second drive box 205, and the spacing can be adjusted by the second adjusting wheel 206 before being conveyed to the punching mechanism 2.

[0043] After the steel strip enters the main support frame 201, the pulleys of the adjusting limit frame 203 clamp and position it from both sides to ensure a stable transmission path. According to preset parameters, the corresponding power cylinder 207 drives the upper pad 204 to press down, cooperating with the punching block 209 on the lower pad 202 to complete the punching of the specified specifications. When the steel strip reaches the preset length, the power cylinder 207 containing the cutting tool actuates, cutting the steel strip into fixed-length workpieces. The limit block 208 and the limit post 211 work together to ensure the accuracy of the cutting length.

[0044] After being cut, the workpiece slides down the discharge roller 212 onto the steel conveyor belt 308, where its lateral displacement is limited by the side baffle 309 until it is stopped and positioned by the stop bar 304. The rear drive frame 310 drives the displacement slide bar 312 to move the push frame 311 forward, pushing the workpiece between the two stamping pads 306; the auxiliary cylinder 307 extends to press the workpiece against the side of the stop bar 304 for final positioning; then the stamping cylinder 302 drives the lifting frame 303 to descend, and the forming mold 305 cooperates with the stamping pads 306 to press the workpiece into a clamp shape. After completion, all mechanisms reset and the cycle begins. Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A numerical control hoop forming machine comprising a punching mechanism (2) and a forming mechanism (3), characterized in that: A straightening mechanism (1) is fixedly installed on one side of the upper end of the punching mechanism (2), and the forming mechanism (3) is installed on the side of the punching mechanism (2) away from the straightening mechanism (1); The punching mechanism (2) includes a main support frame (201). Multiple lower pads (202) are fixedly arranged at the upper end of the main support frame (201). A limit block (208) is provided at the upper end of one of the multiple lower pads (202) near the straightening mechanism (1). A cutting tool is provided at the upper end of one of the multiple lower pads (202) away from the straightening mechanism (1). A punching block (209) of different specifications is provided at the upper ends of the three upper ends of the multiple lower pads (202) near the middle. An upper pad (204) is provided at the upper end of the limit block (208), the cutting tool and the multiple punching blocks (209). Multiple power cylinders (207) are provided through the upper end of the main support frame (201). The lower output end of the multiple power cylinders (207) is connected to the upper end of the multiple upper pads (204) respectively. The forming mechanism (3) includes a stamping frame (301), a steel belt conveyor (308) is provided at the rear end of the stamping frame (301), a stamping cylinder (302) is provided through the middle of the upper end of the stamping frame (301), a lifting frame (303) is fixedly provided at the lower end of the stamping cylinder (302), a forming mold (305) is fixedly provided at the middle of the lower end of the lifting frame (303), and two stamping pads (306) are fixedly provided at the bottom inside the stamping frame (301).

2. The numerically controlled clamp forming machine according to claim 1, characterized in that: The correction mechanism (1) includes a front connecting frame (101), in which a plurality of correction rollers (102) are rotatably arranged. A first drive box (104) is fixedly arranged at the front end of the front connecting frame (101), and the first drive box (104) is connected to the plurality of correction rollers (102) to drive them to rotate.

3. The numerically controlled clamp forming machine according to claim 2, characterized in that: Multiple feed rollers (105) are rotatably arranged on one side inside the front connecting frame (101), and multiple first adjusting wheels (103) are rotatably arranged on the upper end of the front connecting frame (101) to adjust the spacing of multiple straightening rollers (102).

4. The numerically controlled hoop forming machine of claim 1, wherein: A rear connecting frame (210) is fixedly installed on one side of the main support frame (201). A limit post (211) is threaded through the interior of the rear connecting frame (210). A discharge frame (213) is fixedly installed inside the opening on the side of the main support frame (201) near the lower end of the limit post (211). Multiple discharge rollers (212) are rotatably installed inside the discharge frame (213). The lower end of the discharge frame (213) is located at the upper end of one side of the steel belt conveyor (308).

5. The numerically controlled clamp forming machine according to claim 1, characterized in that: One of the two stamping pads (306) has an auxiliary cylinder (307) fixedly installed at its upper end, and the other has a stop bar (304) fixedly installed at its upper end.

6. The CNC clamp forming machine according to claim 1, characterized in that: A side baffle (309) is fixedly installed on one side of the rear end of the steel belt (308), and a rear drive frame (310) is fixedly installed at the rear end of the steel belt (308). Two displacement slide rods (312) are fixedly installed inside the sliding end of the rear drive frame (310), and a push frame (311) is fixedly installed at the front end of the two displacement slide rods (312).

7. The numerically controlled clamp forming machine according to claim 1, characterized in that: The main support frame (201) is fixedly provided with an adjustment limit frame (203) on the side of the upper end near the multiple lower pads (202). The upper end of the multiple adjustment limit frames (203) is provided with two pulleys, which can clamp and limit the material in the middle.

8. The numerically controlled clamp forming machine according to claim 1, characterized in that: The main support frame (201) has a second drive box (205) located at the upper end near one side. The power output end of the second drive box (205) is equipped with a power roller. The upper end of the second drive box (205) is equipped with multiple second adjustment wheels (206) to adjust the spacing of the power rollers.

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