Punching equipment for automobile skylight frame machining

Abstract

The invention relates to the related technical field of automobile skylight frame machining, in particular to punching equipment for automobile skylight frame machining, which comprises a workbench, a punching assembly and symmetrically arranged positioning and feeding assemblies, the punching assembly comprises an upper die holder, a lower die holder, a concave plate and a punch, and the concave plate is provided with a small taper of 3-10 degrees around a punching cutting edge; the positioning and feeding assembly comprises an installation bottom plate, a liftable pressing plate, a lead screw and a rolling wheel, the lead screw is matched with a pre-tightening ball nut through trapezoidal threads, and the rolling wheel is rotationally installed below the pressing plate through a bearing. According to the equipment, burrs on a workpiece are synchronously removed through a taper structure, the pressing plate is matched with the workpiece with the thickness of 2-5 mm in a lifting mode, limiting and smooth feeding are achieved through the rolling wheels, the subsequent deburring procedure is not needed, operation is convenient and fast, and the production efficiency and the product percent of pass are improved.

Description

Technical Field

[0001] This invention relates to the technical field of automotive sunroof frame processing, and in particular to a punching device for automotive sunroof frame processing. Background Technology

[0002] As a key load-bearing and decorative component of the car body, the sunroof frame requires drilling during production. The concave plate of traditional punching equipment has a flat surface, which easily produces burrs on the die side of the workpiece during punching. This requires additional grinding and polishing processes, extending the production cycle. Moreover, existing positioning mechanisms mostly use rigid clamping or single sliding limit. While rigid clamping can ensure positioning accuracy, it requires repeated disassembly and reassembly of the clamping structure during feeding, which is cumbersome and inefficient. Sliding limit has the problems of high friction and difficult feeding, and it is difficult to adapt to sunroof frame workpieces with different thicknesses of 2-5mm, which can easily lead to workpiece loosening or surface damage.

[0003] To address the aforementioned issues, a punching device for processing automotive sunroof frames is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a punching device for processing automotive sunroof frames, so as to solve the problem of the existing punching devices for processing automotive sunroof frames mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a punching device for processing automotive sunroof frames, characterized in that it includes a worktable, a punching assembly and a limiting assembly disposed on the worktable; The punching assembly includes an upper die base, a stripper plate, a lower die base, a concave plate, a punching edge, and a punch. The lower die base is fixedly connected to the upper surface of the worktable. The concave plate is horizontally installed on the upper surface of the lower die base. The punching edge is a through hole opened on the concave plate. The upper die base is located directly above the lower die base. The stripper plate is horizontally arranged between the upper die base and the lower die base. The punch is vertically fixedly connected to the lower surface of the upper die base. The axis of the punch is coaxial with the axis of the punching edge. The limiting assembly includes a mounting base plate, a pressure plate, a lead screw, a guide rod, a mounting seat, and a roller. The mounting base plate is mounted on the upper surface of the worktable and located on one side of the punching assembly. The mounting seat is vertically fixed to the upper surface of the mounting base plate. The lead screw passes horizontally through the mounting seat and is rotatably engaged with the mounting seat. One end of the lead screw is rotatably connected to the pressure plate. The guide rod is arranged parallel to the lead screw, passes through the mounting seat, and is slidably engaged with the mounting seat. One end of the guide rod is fixedly connected to the pressure plate. The roller is rotatably mounted on the side of the mounting seat facing the workpiece via a rotating shaft, and the axis of the roller is perpendicular to the feeding direction.

[0006] Preferably, a support block is also fixedly provided on the upper surface of the worktable, and the support block extends to the surface of the concave plate for supporting the workpiece.

[0007] Preferably, the punching assembly further includes an upper guide post, a lower guide post, and a convex plate. The upper guide post is vertically fixed to the upper surface of the upper die base, and the lower guide post is vertically fixed to the lower surface of the upper die base. Both the upper guide post and the lower guide post are engaged with guide sleeves that are coaxially arranged with them. The convex plate is horizontally fixed below the upper die base.

[0008] Preferably, the punching assembly further includes a spring and a limiting post. The limiting post is vertically fixed to the lower surface of the upper die base. The spring is sleeved on the outside of the limiting post. The upper end of the spring abuts against the upper die base, and the lower end of the spring abuts against the stripper plate.

[0009] Preferably, the punching assembly further includes a top mounting plate and a support column. The support column is vertically fixed to the upper surface of the worktable, and the top mounting plate is horizontally fixed to the top of the support column. The upper surface of the top mounting plate is connected to the upper die base by a driving component.

[0010] Preferably, the upper surface of the concave plate has a slight taper around the edge of the punching edge, and the angle between the generatrix of the taper and the upper surface of the concave plate is °-°.

[0011] Preferably, the limiting component has six sets of rollers, which are evenly distributed on both sides of the support block along the feeding direction. Each roller is fixed to the lower surface of the pressure plate near the support block by two sets of mounting seats.

[0012] Preferably, the limiting component further includes a mounting block, a ball nut, and a guide sleeve. The mounting block is fixed to the upper surface of the mounting base plate, the ball nut is embedded in the pressure plate, the lead screw is rotatably engaged with the ball nut, the guide sleeve is mounted on the upper surface of the pressure plate, and the guide rod is slidably engaged with the guide sleeve.

[0013] Compared with the prior art, the beneficial effects of the present invention are: By setting a small taper of 3°-10° around the punching edge on the upper surface of the concave plate, the punch moves downward to complete the punching. Burrs are generated at the lower end of the plate. The punch continues to move downward, pressing the plate with burrs tightly onto the cutting edge of the die. This pressing process will cut or scrape off the newly generated burrs from the root. When the punch returns, the ejector plate pushes the workpiece away from the punch. At the same time, the small burr chips that have been trimmed are discharged through the die discharge hole. There is no need to add an extra deburring process, which shortens the production cycle and avoids workpiece deformation and hole position displacement caused by subsequent grinding.

[0014] The positioning and feeding assembly adopts a combination structure of pressure plate lifting and roller limiting. The pressure plate is driven to move up and down by a screw, which can quickly adapt to automotive sunroof frame workpieces with different thicknesses of 2-5mm. The rollers are connected to the rotating shaft through bearings, which converts the sliding friction during feeding into rolling friction, reducing feeding resistance. Operators can easily push the workpiece to adjust its position, greatly improving the convenience of operation. Six sets of rollers are evenly distributed on both sides of the support block along the feeding direction to achieve lateral limiting of the workpiece throughout its entire stroke and prevent deviation during feeding. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the punching assembly of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the punching assembly of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the structure of the limiting component of the present invention; Figure 5 This is a detailed structural diagram of the limiting component of the present invention.

[0016] In the diagram: 1. Workbench; 2. Punching assembly; 201. Upper die base; 202. Stripper plate; 203. Lower die base; 204. Concave plate; 205. Punching edge; 206. Punch; 207. Top mounting plate; 208. Support column; 209. Upper guide column; 210. Lower guide column; 211. Protruding plate; 212. Spring; 213. Limiting column; 3. Limiting assembly; 301. Mounting base plate; 302. Pressure plate; 303. Lead screw; 304. Guide rod; 305. Mounting seat; 306. Roller; 307. Mounting block; 308. Ball nut; 309. Guide sleeve; 4. Support block. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0018] Example like Figure 1-3As shown, the device is characterized by including a worktable 1, a punching assembly 2 and a limiting assembly 3 disposed on the worktable 1, a support block 4 fixedly disposed on the upper surface of the worktable 1, and the support block 4 extending to the surface of the concave plate 204 for supporting the workpiece. The punching assembly 2 includes an upper die base 201, a stripper plate 202, a lower die base 203, a concave plate 204, a punching edge 205 and a punch 206. The lower die base 203 is fixedly connected to the upper surface of the worktable 1. The concave plate 204 is horizontally installed on the upper surface of the lower die base 203. The punching edge 205 is a through hole opened on the concave plate 204. The upper die base 201 is located directly above the lower die base 203. The stripper plate 202 is horizontally disposed between the upper die base 201 and the lower die base 203. The punch 206 is vertically fixedly connected to the lower surface of the upper die base 201. The axis of the punch 206 is coaxial with the axis of the punching edge 205. The punching assembly 2 also includes an upper guide post. The punch assembly 209 includes a lower guide post 210 and a protruding plate 211. The upper guide post 209 is vertically fixed to the upper surface of the upper die base 201, and the lower guide post 210 is vertically fixed to the lower surface of the upper die base 201. Both the upper guide post 209 and the lower guide post 210 are engaged with guide sleeves coaxially arranged therewith. The protruding plate 211 is horizontally fixed below the upper die base 201. The punching assembly 2 also includes a spring 212 and a limiting post 213. The limiting post 213 is vertically fixed to the lower surface of the upper die base 201. On the lower surface, spring 212 is sleeved on the outside of limit post 213. The upper end of spring 212 abuts against upper mold base 201, and the lower end of spring 212 abuts against stripper plate 202. The punching assembly 2 also includes top mounting plate 207 and support post 208. Support post 208 is vertically fixed on the upper surface of worktable 1, and top mounting plate 207 is horizontally fixed on the top of support post 208. The upper surface of top mounting plate 207 is connected to upper mold base 201 with a drive component.

[0019] It should be noted that in this embodiment, the workbench 1 has four adjustable support feet at its four corners and center. The support feet are threaded into the screw holes at the bottom of the workbench 1, and can be rotated to adjust the level of the equipment to adapt to different workshop floor environments. The support block 4 is welded to the upper surface of the workbench 1, with one end extending to the upper surface of the concave plate 204 to support the workpiece and prevent it from deforming under stress during processing. The lower mold base 203 is fixed to the center of the upper surface of the workbench 1 by four sets of M16 bolts. The upper surface is ground and used to install the concave plate 204. The concave plate 204 is fixed to the upper surface of the lower mold base 203 by locating pins. Two through-holes are formed side by side on the concave plate 204. The upper surface of the concave plate 204 is machined with a slight taper around each punching edge 205. The angle between the generatrix of the taper and the upper surface of the concave plate 204 is set to 5°. The diameter of the taper area is 2mm larger than that of the punching edge 205, and the depth is 1mm. The machining method is CNC milling to ensure a smooth tapered surface, so as to remove the burrs on the lower side of the workpiece die during punching. The upper die holder 201 is matched with the lower die holder 203 and is located directly above the lower die holder 203, and is vertically aligned with the lower die holder 203. The stripper plate 202 is horizontally set between the upper die holder 201 and the lower die holder 203. The concave plate 204 has a clearance hole corresponding to the position of the punch 206 to ensure that the punch 206 passes through smoothly. The tail of punch 206 is fixed to the upper die base 201 through a transition fit. The protrusion plate 211 enhances the connection strength between punch 206 and upper die base 201, preventing the punch from bending under force during punching. Four upper guide posts 209 are vertically fixed on the upper surface of the upper die base 201, and four lower guide posts 210 are vertically fixed on the lower surface. Guide sleeves that mate with the upper guide posts 209 are installed on the upper surface of the top mounting plate 207. The lower die base 203 has clearance holes that match the lower guide posts 210. Limiting posts 213 are vertically fixed at the four corners of the lower surface of the upper die base 201. Springs 212 are stainless steel compression springs 212, which are sleeved on the outside of the limiting posts 213. The upper end of the spring 212 abuts against the upper die base 201. The lower end abuts against the unloading plate 202, providing the elastic force required for unloading. There are four support columns 208, which are vertically fixed to the upper surface of the worktable 1. The top end is fixed to the top mounting plate 207 by bolts. The support column 208 is 800mm high to ensure that the upper die holder 201 has sufficient movement stroke. The driving component adopts a standard SC100×100 cylinder. The cylinder body is fixed to the upper surface of the top mounting plate 207 by a flange. The lower end of the piston rod passes through the through hole of the top mounting plate 207 and is fixed to the connecting seat on the upper surface of the upper die holder 201 by a pin. The working pressure of the cylinder is 0.6-0.8MPa, and the speed of driving the punch 206 to move up and down is 50mm / s, which meets the punching efficiency requirements.

[0020] like Figure 4 , 5As shown, the limiting assembly 3 includes a mounting base plate 301, a pressure plate 302, a lead screw 303, a guide rod 304, a mounting seat 305, and a roller 306. The mounting base plate 301 is mounted on the upper surface of the workbench 1 and located on one side of the punching assembly 2. The mounting seat 305 is vertically fixed to the upper surface of the mounting base plate 301. The lead screw 303 horizontally passes through the mounting seat 305 and rotatably engages with it. One end of the lead screw 303 is rotatably connected to the pressure plate 302. The guide rod 304 is set parallel to the lead screw 303, passes through the mounting seat 305, and slidably engages with it. One end of the guide rod 304 is fixedly connected to the pressure plate 302. The roller 306 rotates via a rotating shaft. The rollers 306 are mounted on the side of the mounting base 305 facing the workpiece. The axis of the rollers 306 is perpendicular to the feeding direction. There are six sets of rollers 306 in the limiting component 3, which are evenly distributed on both sides of the support block 4 along the feeding direction. Each roller 306 is fixed to the lower surface of the pressure plate 302 near the support block 4 by two sets of mounting bases 305. The limiting component 3 also includes a mounting block 307, a ball nut 308 and a guide sleeve 309. The mounting block 307 is fixed to the upper surface of the mounting base plate 301. The ball nut 308 is embedded in the pressure plate 302. The lead screw 303 is rotatably engaged with the ball nut 308. The guide sleeve 309 is mounted on the upper surface of the pressure plate 302. The guide rod 304 is slidably engaged with the guide sleeve 309.

[0021] It should be noted that in this embodiment, the mounting base plate 301 is fixed to the upper surface of the workbench 1 by bolts, located on both sides of the punching assembly 2, with one set on each side, arranged symmetrically. The mounting block 307 is fixed to the mounting base plate 301 by bolts. There are a total of 12 mounting seats 305, corresponding to 6 sets of rollers 306, with 2 mounting seats 305 in each set. The vertical section is fixed to the lower surface of the pressure plate 302 near the support block 4 by bolts. The horizontal section has shaft holes for mounting the rollers 306. The rollers 306 are evenly distributed on both sides of the support block 4 along the feeding direction, with 3 sets on each side. Each set of rollers 306 is arranged symmetrically, with bearings installed in the inner holes. They are rotatably mounted in the shaft holes of the mounting seats 305 by a rotating shaft. The two ends of the rotating shaft are fixed by snap rings to ensure the rollers... 306 rotates smoothly. The pressure plate 302 is located above the mounting base plate 301 and is arranged parallel to the feeding direction. The pressure plate 302 is fitted with a ball nut 308, which cooperates with the lead screw 303. Two guide sleeves 309 are installed on the upper surface of the pressure plate 302, which slide and cooperate with the guide rod 304. The lead screw 303 is a trapezoidal threaded lead screw, which passes horizontally through the mounting seat 305 and rotates and cooperates with the ball nut 308. A handwheel is installed at one end of the lead screw 303 for easy manual adjustment, and the other end is rotatably connected to the pressure plate 302 through the deep groove ball bearing of the mounting block 307. The guide rod 304 is set parallel to the lead screw 303 and slides and cooperates with the guide sleeve 309. One end of the guide rod 304 is welded and fixed to the mounting base plate 301 to ensure that the pressure plate 302 is not tilted when adjusted. Among them, the ball nut 308 adopts a pre-tightening structure. The thread gap is eliminated by the double nuts pre-tightening each other, which not only improves the transmission accuracy, but also enhances the anti-interference ability of the thread pair. Even when subjected to external forces such as feeding thrust and punching vibration, the pre-tightened thread pair has no relative sliding space, further preventing the lead screw 303 from rotating unexpectedly.

[0022] Working principle of this invention: Refer to the instruction manual appendix Figure 1-5 The workpiece to be processed, the car sunroof frame, is placed on the support block 4, with the edge of the workpiece fitting against the convex surface of the support block 4. This allows the area of ​​the workpiece to be punched to be initially aligned with the lower part of the punch 206 of the punching assembly 2. The handwheel of the lead screw 303 of the limiting assembly 3 is rotated, and the lead screw 303 drives the pressure plate 302 to move down along the guide rod 304 through the ball nut 308 until the outer surface of the roller 306 under the pressure plate 302 is tightly fitted with the upper surface of the workpiece. At this time, the roller 306 cooperates with the support block 4 to achieve lateral limiting and vertical pressing of the workpiece. When adapting to workpieces of different thicknesses, the height of the roller 306 can be adjusted by raising and lowering the pressure plate 302. This not only fixes the workpiece to prevent displacement during punching, but also provides sliding support for subsequent feeding because the roller can rotate freely. Manually push the workpiece to slide along the feeding direction. When the workpiece moves, the rollers 306 on both sides rotate synchronously due to the friction of the workpiece, converting sliding friction into rolling friction, which greatly reduces the feeding resistance. The operator can easily push the workpiece to adjust its position. When the first punching position of the workpiece is aligned with the punch 206 and the punching edge 205 on the same axis, the feeding is stopped. Positioning can be assisted by the scale line or positioning pin on the worktable 1. When the drive unit is activated, the cylinder piston rod extends downward, driving the upper die base 201 to descend vertically along the double guide structure of the upper guide post 209, the top mounting plate 207 guide sleeve, the lower guide post 210, the stripper plate 202, and the lower die base 203 clearance hole. When the upper die base 201 descends, the stripper plate 202 first contacts and presses against the upper surface of the workpiece, and the spring 212 is compressed to prevent the workpiece from warping during punching. As it continues to descend, the punch 206 passes through the clearance hole of the stripper plate 202 to punch the workpiece. The scrap falls into the scrap collection box below the lower die base 203 through the punching edge 205. During the punching process, the 5° micro-taper on the concave plate 204 around the punching edge 205 simultaneously peels off the lower burrs on the concave die side of the workpiece, eliminating the need for subsequent grinding processes. After punching is completed, the cylinder piston rod retracts upward, driving the upper die holder 201 to move upward. The spring 212 releases its elastic force, pushing the unloading plate 202 to maintain contact with the workpiece until the punch 206 is completely separated from the workpiece, realizing automatic unloading and preventing the workpiece from getting stuck on the punch 206. The workpiece is then manually pushed to slide along the feeding direction again, and the roller 306 rotates with the workpiece to assist in feeding. The next punching position is aligned with the punch 206, and the punching action of step 3 is repeated until all punching processes of the workpiece are completed. After all punching processes are completed, the screw 303 handwheel is rotated in the opposite direction to drive the pressure plate 302 to rise and fall, and the roller 306 disengages from the workpiece, allowing the workpiece to be removed.

[0023] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A punching device for processing automotive sunroof frames, characterized in that, It includes a worktable (1), a punching assembly (2) disposed on the worktable (1), and a limiting assembly (3); The punching assembly (2) includes an upper die base (201), a stripper plate (202), a lower die base (203), a concave plate (204), a punching edge (205), and a punch (206). The lower die base (203) is fixedly connected to the upper surface of the workbench (1). The concave plate (204) is horizontally installed on the upper surface of the lower die base (203). The punching edge (205) is a through hole opened on the concave plate (204). The upper die base (201) is located directly above the lower die base (203). The stripper plate (202) is horizontally arranged between the upper die base (201) and the lower die base (203). The punch (206) is vertically fixedly connected to the lower surface of the upper die base (201). The axis of the punch (206) is coaxial with the axis of the punching edge (205). The limiting component (3) includes a mounting base plate (301), a pressure plate (302), a lead screw (303), a guide rod (304), a mounting seat (305), and a roller (306). The mounting base plate (301) is mounted on the upper surface of the workbench (1) and located on one side of the punching component (2). The mounting seat (305) is vertically fixed to the upper surface of the mounting base plate (301). The lead screw (303) passes horizontally through the mounting seat (305) and rotates with the mounting seat (305). One end of the lead screw (303) is rotatably connected to the pressure plate (302). The guide rod (304) is set parallel to the lead screw (303). The guide rod (304) passes through the mounting base (305) and slides with the mounting base (305). One end of the guide rod (304) is fixedly connected to the pressure plate (302). The roller (306) is rotatably mounted on the side of the mounting base (305) facing the workpiece via a rotating shaft. The axis of the roller (306) is perpendicular to the feeding direction.

2. The punching equipment for processing automotive sunroof frames according to claim 1, characterized in that: The workbench (1) is also fixedly provided with a support block (4) on its upper surface, and the support block (4) extends to the surface of the concave plate (204) for supporting the workpiece.

3. The punching equipment for processing automotive sunroof frames according to claim 1, characterized in that: The punching assembly (2) also includes an upper guide post (209), a lower guide post (210), and a convex plate (211). The upper guide post (209) is vertically fixed to the upper surface of the upper die base (201), and the lower guide post (210) is vertically fixed to the lower surface of the upper die base (201). Both the upper guide post (209) and the lower guide post (210) are engaged with guide sleeves that are coaxially arranged with them. The convex plate (211) is horizontally fixed below the upper die base (201).

4. The punching equipment for processing automotive sunroof frames according to claim 1, characterized in that: The punching assembly (2) also includes a spring (212) and a limiting post (213). The limiting post (213) is vertically fixed to the lower surface of the upper die base (201). The spring (212) is sleeved on the outside of the limiting post (213). The upper end of the spring (212) abuts against the upper die base (201), and the lower end of the spring (212) abuts against the unloading plate (202).

5. The punching equipment for processing automotive sunroof frames according to claim 1, characterized in that: The punching assembly (2) also includes a top mounting plate (207) and a support column (208). The support column (208) is vertically fixed to the upper surface of the workbench (1), and the top mounting plate (207) is horizontally fixed to the top of the support column (208). The upper surface of the top mounting plate (207) is connected to the upper mold base (201) with a driving component.

6. The punching equipment for processing automotive sunroof frames according to claim 1, characterized in that: The upper surface of the concave plate (204) is provided with a slight taper around the edge of the punching edge (205), and the angle between the generatrix of the taper and the upper surface of the concave plate (204) is 3°-10°.

7. The punching equipment for processing automotive sunroof frames according to claim 1, characterized in that: The limiting component (3) has six sets of rollers (306) that are evenly distributed on both sides of the support block (4) along the feeding direction. Each roller (306) is fixed by two sets of mounting seats (305) on the lower surface of the pressure plate (302) near the support block (4).

8. The punching equipment for processing automotive sunroof frames according to claim 1, characterized in that: The limiting component (3) also includes a mounting block (307), a ball nut (308), and a guide sleeve (309). The mounting block (307) is fixed on the upper surface of the mounting base plate (301). The ball nut (308) is embedded in the pressure plate (302). The lead screw (303) is rotatably engaged with the ball nut (308). The guide sleeve (309) is mounted on the upper surface of the pressure plate (302). The guide rod (304) is slidably engaged with the guide sleeve (309).

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