A centripetal punching integrated die for a pot and an assembling and using method thereof

Abstract

This invention belongs to the field of stamping die technology and discloses a radial punching integrated die for cookware and its assembly and use method. At least two sets of sliding mechanisms are arranged along the longitudinal center line between the upper and lower die plates. An installation groove is opened on the right side of the upper die plate. A hexagonal single-headed threaded shaft and a bearing are horizontally installed through the installation groove. A radial guide hole is vertically provided on the horizontal boss. A bushing is provided in the radial guide hole. An upper die punch is inserted in each set of radial guide holes. The top surface of the ball head of the upper die punch is in contact with the outer circular surface of the bearing. An adjustment baffle is provided on the right side of the radial die body. The die has a compact structure and is easy to operate. It is a radial punching die specifically developed for non-stick cookware, which abandons the drawbacks of traditional direct punching and avoids the defects of special hydraulic equipment. It achieves radial uniform punching by relying on the radial motion structure. The whole process is uniformly stressed, accurately guided, and runs smoothly, solving the problems of punching explosion-proof ceramics, high precision, and burr-free materials.

Description

Technical Field

[0001] This invention belongs to the field of stamping die technology, specifically relating to an integrated centripetal punching die for cookware and its assembly and usage methods. Background Technology

[0002] In the production and processing of ceramic non-stick pans, punching the handle mounting hole is a key process. Currently, the mainstream processing method uses a straight-up-and-down punching die or a special hydraulic punching machine, which has obvious technical shortcomings and is difficult to adapt to the processing requirements of brittle ceramic coatings.

[0003] The traditional straight-up-and-down punching die, with its vertical punching structure, concentrates the punching force in one direction. This easily causes ceramic coatings with high hardness and brittleness to crack, chip, and peel off around the holes, resulting in a high scrap rate. Furthermore, the punching precision is not well controlled, with severe burrs and rough edges on the hole edges, making it impossible to directly assemble the handle. An additional grinding process is required, which reduces production efficiency and is prone to secondary damage to the pot body. At the same time, the lack of a workpiece clamping and precise guiding structure makes the workpiece prone to movement during punching and can easily carry the workpiece away when the punch returns to its original position, resulting in large hole position deviations and unstable processing quality.

[0004] While using specialized hydraulic punching equipment can achieve radial punching and improve some processing quality, the entire machine is a complete set of specialized equipment, which is bulky, occupies a large production space, and has extremely high equipment purchase and maintenance costs. In addition, the equipment debugging process is complicated, requires professional personnel to operate, and the mold changing steps are cumbersome and time-consuming, making it unable to quickly adapt to the production needs of different specifications of ceramic non-stick pans, resulting in poor practicality and economy.

[0005] There is an urgent need for a radial punching die for assembling holes in cookware handles, to solve the following core technical problems: First, to solve the problems of ceramic cracking and edge chipping caused by concentrated punching force when traditional straight-up-down punching dies are applied to ceramic non-stick cookware, as well as the problems of low punching accuracy, many burrs, and easy workpiece movement and displacement; Second, to overcome the drawbacks of dedicated hydraulic punching equipment, such as large size, high cost, complex debugging, and slow die changing; Third, to optimize the die structure design to achieve uniform pressure transmission, precise guidance, and smooth operation of the punch press, extend the die's service life, adapt to ordinary punch presses, and meet the high-efficiency, high-quality, and low-cost punching needs of non-stick cookware. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a radial punching mold for cookware and its assembly and usage method. The mold is compact, easy to operate, and specifically developed for non-stick cookware. It overcomes the drawbacks of traditional direct punching and avoids the defects of specialized hydraulic equipment. Relying on a radial motion structure, it achieves uniform punching, solving the problems of explosion-proof ceramic, high precision, and burr-free punching. Simultaneously, it also boasts the advantages of a small and flexible mold, convenient debugging and mold changing, and low cost.

[0007] The technical solution adopted in this invention is: a radial punching integrated mold for cookware, comprising an upper mold plate and a lower mold plate. The upper mold plate is located below the punch press slide and moves synchronously with the punch press slide. The lower mold plate is horizontally fixedly installed on the reference surface of the punch press worktable. A pad plate is fixedly installed on the top of the upper mold plate. At least two sets of sliding mechanisms are vertically slidable between the upper and lower mold plates along the longitudinal center line. A spring adjustment mechanism is vertically arranged between the sliding mechanisms. At least two sets of mounting grooves are opened on the right side of the upper mold plate. A hexagonal single-threaded shaft is horizontally installed through the mounting groove. A bearing is fitted on the outside of the hexagonal single-threaded shaft. The upper mold plate and the lower mold plate... A centripetal mold body is installed between the components. A horizontal boss is integrally formed extending to the right from the middle of the right side of the centripetal mold body. At least two sets of centripetal guide holes are vertically connected on the horizontal boss. A bushing is provided in the centripetal guide hole. An upper die punch is inserted into each set of centripetal guide holes. A spring is sleeved on the outside of the upper die punch located at the upper part of the horizontal boss. A polyurethane rubber rod is sleeved on the outside of the upper die punch located at the lower part of the horizontal boss. The top surface of the ball head of the upper die punch is in contact with the outer circular surface of the bearing. A lower punch module is integrally formed extending to the right from the lower right side of the centripetal mold body. A lower die sleeve is provided on the top surface of the lower punch module. An adjusting baffle is fixedly provided on the left side of the centripetal mold body adjacent to the lower punch module.

[0008] The punch press workbench reference surface and the upper and lower templates are vertically provided with multiple mounting holes.

[0009] The sliding mechanism consists of a guide post and a guide sleeve. The guide post is vertically pressed into the mounting hole of the lower mold plate and extends vertically upward. Guide sleeves that cooperate with the guide post are fixed at the bottom of both sides of the upper mold plate. The guide post and guide sleeve of the right sliding mechanism are also vertically inserted through the left side of the centripetal mold body. This achieves precise vertical guidance between the upper and lower molds, constrains the mold movement trajectory, ensures the coaxiality of the upper and lower molds, prevents mold misalignment and misalignment during punching, and further improves punching accuracy.

[0010] The spring adjustment mechanism includes countersunk holes on the upper template and the pad, screw holes on the lower template, and an internal hexagon screw that passes through the pad and the upper template to the lower template. A support spring is sleeved on the outside of the internal hexagon screw, and the upper and lower ends of the support spring abut against the upper template and the lower template, respectively.

[0011] The centripetal mold body is the core frame of the mold, and the bottom of the centripetal mold body is fixedly connected to the lower template with screws.

[0012] The upper surface of the lower punch module is an arc-shaped surface, and the arc curvature of the lower punch module matches the arc curvature of the ceramic non-stick pan workpiece at the punching location. The upper arc surface of the lower punch module has a punching die hole facing downwards, and an arc-shaped protruding lower die sleeve is installed in the punching die hole with an interference fit. The semi-circular center of the lower die sleeve has a center hole facing downwards, and the center hole of the lower die sleeve matches the punching position and size of the ceramic non-stick pan workpiece.

[0013] The bottom of the polyurethane rubber rod is semi-circular, corresponding to the position of the center hole of the lower die sleeve.

[0014] The center lines of the upper die punch, die hole, lower die sleeve, radial guide hole, and bushing of each set are aligned and are nearly perpendicular to the arc-shaped surface at the center of the punch hole of the ceramic non-stick pan workpiece.

[0015] The adjusting baffle is fixedly installed across both sides of the centripetal mold body and is fastened with screws. A groove is provided in the middle of the right side of the adjusting baffle, and the left end face of the lower punch module is attached to the groove. The adjusting baffle is adjusted to a suitable position in the centripetal mold body and relative to the lower punch module by screws to adapt to ceramic non-stick pan workpieces of different specifications and sizes.

[0016] The pad is equipped with an oiling hole, which facilitates the regular addition of lubricating oil to the mold guide and transmission parts to ensure smooth mold operation.

[0017] An assembly method for a radial punching mold for cookware includes the following steps:

[0018] Step 1: Fix the lower template horizontally on the reference surface of the punch press worktable, calibrate the levelness, and ensure that the installation is stable and without shaking;

[0019] Step 2: Press the guide post vertically into the preset mounting hole of the lower template to ensure the verticality of the guide post. Then, fit the centripetal mold body onto the right guide post and fix it onto the lower template with screws. Install the adjusting baffle and make preliminary adjustment of the positioning position. Place the lower punch module against the right groove of the adjusting baffle and fit the lower die into the corresponding punch hole of the lower punch module.

[0020] Step 3: Fit the bushing into the corresponding radial guide hole on the horizontal boss on the right side of the radial mold body, insert the upper mold punch, and assemble the spring;

[0021] Step 4: Insert the guide sleeve into the upper template; assemble the internal hexagonal single-threaded shaft into the upper template and fix the bearing;

[0022] Step 5: Install the spring adjustment mechanism. The support spring is fitted on the outside of the hexagon socket screw. The guide sleeve is fitted on the top of the guide post. Close the upper template so that the outer surface of the bearing is in contact with the top surface of the ball head of the upper die punch. The upper template can slide smoothly along the guide post.

[0023] Step 6: Install the pad on top of the upper template, add lubricating oil through the pre-drilled oil hole on the pad, and finally install the polyurethane rubber rod, adjusting its height to effectively press the workpiece.

[0024] A method for using a radial punching mold for cookware includes the following steps:

[0025] Step 1, Loading and Positioning: Place the ceramic non-stick pan workpiece to be punched upside down on the lower die sleeve of the lower punching module, and use the adjusting baffle to calibrate the position of the ceramic non-stick pan workpiece so that its punching point is aligned with the middle part of the central main die.

[0026] Step 2, Pressing and punching: Start the punch press. The punch press slide moves down and drives the pad and upper template to move synchronously. The polyurethane rubber rod first flexibly presses the ceramic non-stick pan workpiece. Then, the upper template and fixed bearing drive the upper die punch to feed radially inward when the punch press slide moves down. Together with the lower die punch sleeve, the punching of the handle mounting hole of the ceramic non-stick pan workpiece is completed.

[0027] Step 3, Reset and Remove Part: The punch press slide moves upward, the support spring drives the pad and upper module to reset, the spring drives the upper die punch to automatically reset, the polyurethane rubber rod releases the ceramic non-stick pan workpiece, and the punched ceramic non-stick pan workpiece is removed, thus completing a single operation. Repeated operation realizes batch processing.

[0028] A pad is fixedly installed on the top of the upper template, and the pad has an oiling hole. The purpose of this setting is that the pad, as a pressure-bearing component of the upper mold, mainly functions to evenly transmit the punching pressure, distribute the force to protect the upper template, and prevent the upper template from deforming and being damaged. At the same time, it can effectively prevent dust and debris from falling into the mold, reducing the risk of dust falling and jamming in the punch sleeve. The pad has a reserved oiling hole, which is convenient for periodically adding lubricating oil to the mold guide and transmission parts to ensure smooth mold operation.

[0029] At least two sets of mounting slots are provided on the right side of the upper template. A single-headed hexagonal threaded shaft is horizontally installed through the mounting slots, and a bearing is fitted on the outside of the single-headed hexagonal threaded shaft. The purpose of this arrangement is that the upper template serves as the core mounting base for the upper die, supporting and mounting various components of the upper die. Located below the press slide, it moves synchronously with the slide, providing sufficient overall rigidity for the upper die components, ensuring no deformation or off-center load during die operation, and maintaining punching stability. The single-headed hexagonal threaded shaft is used to fix the bearing position, limit the bearing rotation trajectory, ensure bearing coaxiality, avoid bearing wobble, ensure precise power transmission, and maintain the operating accuracy of the radial punching mechanism.

[0030] At least two sets of centripetal guide holes are vertically connected on the horizontal boss. Bushings are installed inside the centripetal guide holes, and an upper die punch is inserted into each set of centripetal guide holes. A spring is fitted around the upper die punch located at the upper part of the horizontal boss, and a polyurethane rubber rod is fitted around the upper die punch located at the lower part of the horizontal boss. The top surface of the ball head of the upper die punch is in contact with the outer surface of the bearing. The purpose of this arrangement is: the bushings, fitted around the upper die punch, protect the punch guide holes, prevent the punch from directly wearing the main structure, and extend the service life of the centripetal die body; the bushings and upper die punches are consumable parts, and can be easily replaced individually, reducing mold maintenance costs. The spring, assembled around the upper die punch, uses its own elastic potential energy to quickly reset the upper die punch after punching, achieving automatic mold return without external force assistance, thus improving work efficiency; the polyurethane rubber rod provides both elastic buffering and clamping functions, flexibly clamping the workpiece before punching to prevent workpiece movement during punching, while also buffering the impact force of punching, protecting the brittle ceramic coating, and preventing ceramic chipping and edge breakage. The upper die punch works in conjunction with the bearing. The upper die punch punches the cookware through radial centripetal motion, ensuring the accuracy of the hole diameter and the regularity of the hole shape. It can reduce the frictional resistance during the wedge motion, reduce component wear, ensure smooth feeding of the centripetal motion mechanism, avoid transmission jamming, improve the smoothness of the die operation, and achieve high-precision punching. The upper die punch feeds synchronously towards the center of the workpiece to achieve uniform punching, and structurally avoids stress concentration that could damage the ceramic coating of the workpiece.

[0031] The beneficial effects of this invention are as follows: Compared with traditional punching dies and dedicated hydraulic punching equipment, this integrated centripetal punching die has the following outstanding effects:

[0032] 1. Excellent punching quality, completely solving the problem of ceramic cracking: The centripetal die body achieves radial uniform punching, and the matching polyurethane rubber rod provides elastic buffering and clamping, dispersing the punching force without concentration, thus eliminating the problems of ceramic cracking, chipping, and peeling of brittle ceramic coatings from the root; the upper die punch and the lower die sleeve are precisely matched, with high coaxiality of the guide, meeting the hole diameter accuracy, and the hole cross-section is smooth and burr-free. The handle can be directly assembled without grinding, and the processing quality far exceeds that of traditional straight punch dies.

[0033] 2. Compact structure and easy debugging and maintenance: The integral mold structure occupies little space, requires no special hydraulic equipment, and can be directly adapted to ordinary punch presses; bearing friction reduction, guide pillars and guide sleeves provide precise guidance, ensuring smooth operation, convenient operation, and low maintenance costs.

[0034] 3. Quick mold change and highly adaptable: Equipped with an adjustable baffle, the workpiece positioning can be quickly adjusted to adapt to different specifications of ceramic non-stick pans; by changing the punch and bushing, it can adapt to different hole diameter requirements and is suitable for small and medium batch, multi-specification flexible production.

[0035] 4. Stable operation and long service life: The pad plate evenly bears pressure to protect the upper mold, the bushing protects the main structure, the bearing reduces transmission wear, the guide pillars and guide bushings accurately prevent deviation, the force of each part of the mold is reasonable and the wear is small, the overall rigidity is sufficient and the operation is stable, which greatly extends the service life of the mold.

[0036] 5. High efficiency and suitable for mass production: The spring drives the punch to automatically reset, eliminating the need for manual reset and simplifying the single punching process; there are no complicated debugging or cumbersome mold changing steps, enabling continuous batch operations and high production efficiency. Attached Figure Description

[0037] Figure 1 This is a front view structural diagram of the centripetal punching integrated mold of the present invention;

[0038] Figure 2 This is a side view of the integrated centripetal punching mold of the present invention.

[0039] Figure 3 This is a top view of the integrated centripetal punching mold of the present invention.

[0040] Figure 4 This is a three-dimensional structural diagram of the centripetal punching integrated mold of the present invention;

[0041] Figure 5 This is a three-dimensional structural diagram of the integrated centripetal punching mold of the present invention during use;

[0042] Figure 6 This is a schematic diagram of the longitudinal section structure of the combination of the upper die punch, bushing, and lower die bushing of the present invention.

[0043] Figure 7 This is a schematic diagram of the three-hole structure of the centripetal die body of the centripetal punching integrated die of the present invention;

[0044] Figure 8 This is a schematic diagram of the two-hole structure of the radial die body of the radial punching integrated die of the present invention.

[0045] The markings in the diagram are: 1. Pad; 2. Upper template; 3. Bearing; 4. Hexagonal single-headed threaded shaft; 5. Bushing; 6. Upper die punch; 7. Centripetal die body; 8. Spring; 9. Guide post; 10. Guide sleeve; 11. Support spring; 12. Polyurethane rubber rod; 13. Lower die punch sleeve; 14. Lower punch module; 15. Lower template; 16. Adjusting baffle; 17. Punch press worktable; 18. Ceramic non-stick pan workpiece; 19. Punch press slide block. Detailed Implementation

[0046] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] like Figure 1-5As shown, a radial punching mold for cookware includes an upper template 2 and a lower template 15. The upper template 2 is located below the punch press slide 19 and moves synchronously with the punch press slide 19. Multiple mounting holes are vertically provided on the reference surface of the punch press worktable 17 and on the upper template 2 and the lower template 15. The lower template 15 is horizontally fixedly installed on the reference surface of the punch press worktable 17. A pad 1 is fixedly installed on the top of the upper template 2. The pad 1 is provided with an oiling hole to facilitate the periodic addition of lubricating oil to the mold guide and transmission parts to ensure smooth mold operation. At least two sets of sliding mechanisms are vertically slidable between the upper template 2 and the lower template 15 along the longitudinal center line, and spring adjustment mechanisms are vertically arranged between the sliding mechanisms; at least two sets of mounting slots are opened on the right side of the upper template 2, and three sets of internal hexagonal single-threaded shaft cores 4 are horizontally installed through the mounting slots. Bearings 3 are fitted on the outside of the internal hexagonal single-threaded shaft cores 4. A centripetal mold body 7 is installed between the upper template 2 and the lower template 15. The centripetal mold body 7 is the core frame of the mold, and the bottom of the centripetal mold body 7 is fixedly connected to the lower template 15 with screws; a horizontal protrusion is integrally provided on the right side of the centripetal mold body 7 extending to the right from the middle. The platform has at least two sets of centripetal guide holes vertically penetrating through it. A bushing 5 is provided inside the centripetal guide hole. An upper die punch 6 is inserted into each set of centripetal guide holes. A spring 8 is sleeved on the upper die punch 6 located at the upper part of the horizontal boss. A polyurethane rubber rod 12 is sleeved on the upper die punch 6 located at the lower part of the horizontal boss. The top surface of the ball head of the upper die punch 6 is in contact with the outer circular surface of the bearing 3. A lower punch module 14 is integrally provided on the lower right side of the centripetal die body 7. A lower die sleeve 13 is provided on the top surface of the lower punch module 14. An adjusting baffle 16 is fixedly provided on the left side of the centripetal die body 7 adjacent to the lower punch module.

[0048] The sliding mechanism consists of a guide post 9 and a guide sleeve 10 working together. The guide post 9 is vertically pressed into the mounting hole of the lower template 2 and extends vertically upward. The bottom of the upper template 2 is fixedly provided with a guide sleeve 10 that works with the guide post 9. The guide post 9 and guide sleeve 10 of the right sliding mechanism are also vertically inserted into the left side of the centripetal mold body 7. This achieves precise vertical sliding guidance between the upper and lower molds, constrains the mold movement trajectory, ensures the coaxiality of the upper and lower molds, prevents mold misalignment and misalignment during punching, and further improves punching accuracy.

[0049] The spring adjustment mechanism includes countersunk holes on the upper template 2 and the pad 1, and screw holes on the lower template 15. A hexagonal socket screw passes through the pad 1 and the upper template 2 into the lower template 15. A support spring 11 is fitted around the hexagonal socket screw, with its upper and lower ends abutting against the upper template 2 and the lower template 15, respectively. The spring adjustment mechanism connects the upper, middle, and lower components together via screws, adjusting the opening height, fixing the support spring 11 to prevent tilting, and preventing the upper template 2 and components from being ejected upwards.

[0050] The upper surface of the lower punch module 14 is arc-shaped, and the curvature of the arc surface of the lower punch module 14 matches the curvature of the arc surface of the ceramic non-stick pan workpiece 18 at the punching location. A punching die hole is provided on the upper arc surface of the lower punch module 14, and an arc-shaped protrusion of the lower die sleeve 13 is interference-fitted into the punching die hole. A central hole is provided at the center of the semi-circular protrusion of the lower die sleeve 13, and the central hole of the lower die sleeve 13 matches the position and size of the punching hole in the ceramic non-stick pan workpiece 18. The bottom of the polyurethane rubber rod 12 is semi-circular, corresponding to the position of the central hole of the lower die sleeve 13.

[0051] The center lines of the upper die punch 6, the punch hole, the lower die punch sleeve 12, the radial guide hole, and the bushing 5 in each group coincide and are nearly perpendicular to the arc-shaped surface at the center of the punch hole of the ceramic non-stick pan workpiece.

[0052] The adjusting baffle 16 is fixedly mounted across both sides of the centripetal mold body 7 and is fastened with screws. The right side of the adjusting baffle 16 has a groove in the middle, and the left end face of the lower punch module 14 is attached to the groove. The adjusting baffle 16 is adjusted to a suitable position on the centripetal mold body 7 and relative to the lower punch module 14 by screws to adapt to ceramic non-stick pan workpieces 18 of different specifications and sizes.

[0053] The upper die punch 6 is made of SKD-11 type high carbon, high chromium, and high molybdenum cold work die steel, with a hardness of HRC58-60° after heat treatment; the lower die punch 12 and bushing 5 are both made of SKH-51 type tungsten-molybdenum high-speed steel, with a hardness of HRC63-65° after heat treatment; the upper die punch and bushing are machined according to tolerances to ensure sliding fit.

[0054] like Figure 6-7 As shown, when the cookware handle requires three-hole assembly, three sets of mounting slots are respectively opened on the three sides of the right end of the upper template 2. Three sets of internal hexagonal single-headed threaded shaft cores 4 are horizontally installed through the mounting slots. Three sets of bearings 3 are fitted on the outside of the internal hexagonal single-headed threaded shaft cores 4. The horizontal boss of the centripetal mold body 7 is vertically provided with centripetal guide holes distributed in a triangle. The top surface of the ball head of the three sets of upper mold punches 6 is respectively in contact with the outer circular surface of the corresponding bearing 3. The top surface of the lower punch module 14 of the centripetal mold body 7 is provided with three sets of lower mold punch sleeves 13, which are distributed in a triangle and correspond to the position of the upper mold punches 6. Each set of upper mold punches 6, lower mold punch sleeves 13 and bushings 5 ​​coincides with the center line of the centripetal guide hole and is perpendicular to the arc surface at the center of the punch hole of the ceramic non-stick cookware workpiece 18.

[0055] like Figure 6 , Figure 8As shown, when the cookware handle requires two holes for assembly, a set of mounting grooves is provided on each of the two opposite sides of the right end of the upper template 2. A hexagonal single-headed threaded shaft core 4 is horizontally installed through the mounting groove. A bearing 3 is fitted on the outside of the hexagonal single-headed threaded shaft core 4. Two sets of radial guide holes are vertically provided on the horizontal boss of the radial mold body 7. The top surface of the ball head of the two sets of upper mold punches 6 respectively fits against the outer circular surface of the corresponding bearing 3. Two sets of lower mold punch sleeves 13 are provided on the top surface of the lower punch module 14 of the radial mold body 7, corresponding to the position of the upper mold punches 6. Each set of upper mold punches 6, lower mold punch sleeves 13 and bushings coincides with the center line of the radial guide hole and is perpendicular to the arc surface at the center of the punch hole of the ceramic non-stick cookware workpiece 18.

[0056] An assembly method for a radial punching mold for cookware includes the following steps:

[0057] Step 1: Fix the lower template 15 horizontally on the reference surface of the punch press worktable 17, calibrate the levelness, and ensure that the installation is stable and without shaking;

[0058] Step 2: Press the guide post 9 vertically into the preset mounting hole of the lower template 15 to ensure the verticality of the guide post 9. Then, fit the centripetal mold body 7 onto the right guide post 9 and fix it on the lower template 15 with bolts. Install the adjusting baffle 16 and initially adjust the positioning position. The lower punch module 14 is attached to the right groove of the adjusting baffle 16. Insert the lower die sleeve 13 into the corresponding punch hole of the lower punch module 14.

[0059] Step 3: Assemble the bushing 5 into the corresponding radial guide hole on the horizontal boss on the right side of the radial mold body 7, insert the upper mold punch 6, and assemble the spring 8.

[0060] Step 4: Insert the guide sleeve 10 into the upper template 2, assemble the internal hexagonal single-headed threaded shaft core 4 onto the upper template 2, and fix the bearing 3;

[0061] Step 5: Install the spring adjustment mechanism, install the support spring 11, install the guide sleeve 10 on the top of the guide post 9, close the upper template 2, and adjust the opening height between the upper and lower templates by using the hex screws; so that the outer surface of the bearing 3 fits against the top surface of the ball head of the upper die punch 6, and the upper template 2 can slide smoothly along the guide post 9;

[0062] Step 6: Install pad 1 on top of upper template 2, add lubricating oil through the pre-reserved oil filling hole of pad 1, and finally install polyurethane rubber rod 12, adjusting its height to effectively press the workpiece.

[0063] A method for using a radial punching mold for cookware includes the following steps:

[0064] Step 1, Loading and Positioning: Place the ceramic non-stick pan workpiece 18 to be punched upside down on the lower die sleeve 13 of the lower punch module 14, and calibrate the position of the ceramic non-stick pan workpiece 18 by relying on the adjusting baffle 16, so that its punching point is aligned with the middle part of the central main body mold 7.

[0065] Step 2, Pressing and punching: Start the punch press. The punch press slide 19 moves downward, driving the pad 1 and the upper template 2 to move synchronously. The polyurethane rubber rod 12 first flexibly presses the ceramic non-stick pan workpiece 18. Then, the upper template 2 and the fixed bearing 3 drive the upper die punch 6 to feed radially and inward when the punch press slide 19 moves downward. Together with the lower die punch sleeve 13, the punching of the handle mounting hole of the ceramic non-stick pan workpiece 18 is completed.

[0066] Step 3, Reset and Remove Parts: The punch press slide moves upward, the support spring 11 drives the pad 1 and the upper module 2 to reset, the spring 8 drives the upper die punch 6 to automatically reset, the polyurethane rubber rod 12 releases the ceramic non-stick pan workpiece 18, and the punched ceramic non-stick pan workpiece 18 is removed, thus completing a single operation. The cycle operation realizes batch processing.

[0067] This invention adopts a centripetal punch integrated mold, abandoning the traditional straight-up and straight-down punching mode. After being installed on the worktable of an ordinary punch press, the punch press slide 19 moves downward, driving the pad plate 1 and the upper template 2 to move synchronously. The pad plate 1 evenly transmits the punch press pressure, and the guide post 9 and guide sleeve 10 provide precise guidance and prevent deviation. The internal hexagonal single-headed threaded shaft core 4 fixes the bearing 3 to ensure coaxial transmission. The bearing 3 reduces friction and converts vertical power into radial centripetal thrust, driving the upper die punch 6 to feed. The polyurethane rubber rod 12 first clamps the workpiece to buffer the punching force. The upper die punch 6 cooperates with the lower die punch sleeve 13 to complete the precise punching. After the punch press slide 19 moves upward, the support spring 11 drives the pad plate 1 and the upper template 2 to reset. The spring 8 drives the upper die punch 6 to automatically reset. The ceramic non-stick pan workpiece 18 is removed, and the single punching is completed. The entire process is characterized by uniform force, precise guidance, and smooth operation, completely solving the problems of ceramic punching chipping and burrs.

[0068] The parts of this invention not described in detail are prior art. In addition to the above embodiments, this invention may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this invention.

Claims

1. A concentric punching mold for cookware, characterized in that: The upper and lower templates are included. The upper template is located below the punch press slide and moves synchronously with it. The lower template is horizontally fixed on the reference surface of the punch press worktable. A pad is fixedly installed on the top of the upper template. At least two sets of sliding mechanisms are vertically slidable between the upper and lower templates along the longitudinal center line, and spring adjustment mechanisms are vertically installed between the sliding mechanisms. At least two sets of mounting slots are opened on the right side of the upper template. A hexagonal single-threaded shaft is horizontally installed through the mounting slot. A bearing is fitted on the outside of the hexagonal single-threaded shaft. A radial die body is installed between the upper and lower templates. A horizontal boss is integrally formed extending to the right from the middle of the right side of the body. At least two sets of centripetal guide holes are vertically connected on the horizontal boss. A bushing is provided in the centripetal guide hole. An upper die punch is inserted into each set of centripetal guide holes. A spring is sleeved on the upper die punch located at the top of the horizontal boss. A polyurethane rubber rod is sleeved on the upper die punch located at the bottom of the horizontal boss. The top surface of the ball head of the upper die punch is in contact with the outer circular surface of the bearing. A lower punch module is integrally formed extending to the right from the lower right side of the centripetal die body. A lower die sleeve is provided on the top surface of the lower punch module. An adjusting baffle is fixed on the left side of the centripetal die body adjacent to the lower punch module. The method of using this integrated centripetal punching die includes the following steps: Step 1, Loading and Positioning: Place the ceramic non-stick pan workpiece to be punched upside down on the lower die sleeve of the lower punching module, and use the adjusting baffle to calibrate the position of the ceramic non-stick pan workpiece so that its punching point is aligned with the middle part of the central main die. Step 2, Pressing and punching: Start the punch press. The punch press slide moves down and drives the pad and upper template to move synchronously. The polyurethane rubber rod first flexibly presses the ceramic non-stick pan workpiece. Then, the upper template and fixed bearing drive the upper die punch to feed radially inward when the punch press slide moves down. Together with the lower die punch sleeve, the punching of the handle mounting hole of the ceramic non-stick pan workpiece is completed. Step 3, Reset and Remove Part: The punch press slide moves upward, the support spring drives the pad and upper module to reset, the spring drives the upper die punch to automatically reset, the polyurethane rubber rod releases the ceramic non-stick pan workpiece, and the punched ceramic non-stick pan workpiece is removed, thus completing a single operation. Repeated operation realizes batch processing.

2. The radial punching mold for cookware according to claim 1, characterized in that: Multiple mounting holes are vertically opened on the reference surface of the punch press worktable, as well as on the upper and lower templates; the centripetal mold body is the core frame of the mold, and the bottom of the centripetal mold body is fixedly connected to the lower template with screws.

3. The radial punching mold for cookware according to claim 1, characterized in that: The sliding mechanism consists of guide posts and guide sleeves. The guide posts are vertically pressed into the mounting holes of the lower template and extend vertically upward. Guide sleeves that cooperate with the guide posts are fixed at the bottom of both sides of the upper template. The guide posts and guide sleeves of the right sliding mechanism are also vertically installed on the left side of the centripetal mold body.

4. The radial punching integral mold for cookware according to claim 1, characterized in that: The spring adjustment mechanism includes countersunk holes on the upper template and the pad, screw holes on the lower template, and a hexagon socket screw that passes through the pad and the upper template to the lower template. A support spring is fitted around the hexagon socket screw, and the upper and lower ends of the support spring abut against the upper template and the lower template, respectively.

5. The radial punching mold for cookware according to claim 1, characterized in that: The upper surface of the lower punch module is arc-shaped, and the curvature of the arc surface of the lower punch module matches the curvature of the ceramic non-stick pan workpiece at the punching location. The upper arc surface of the lower punch module has a punching die hole facing downwards. A lower die sleeve with an arc-shaped protrusion is installed in the punching die hole with an interference fit. The center of the semi-circular arc of the lower die sleeve has a center hole facing downwards. The center hole of the lower die sleeve matches the punching position and size of the ceramic non-stick pan workpiece. The bottom of the polyurethane rubber rod is semi-circular, corresponding to the position of the center hole of the lower die sleeve.

6. The radial punching mold for cookware according to claim 1, characterized in that: The center lines of the upper die punch, die hole, lower die sleeve, radial guide hole, and bushing of each set are aligned and are nearly perpendicular to the arc-shaped surface at the center of the punch hole of the ceramic non-stick pan workpiece.

7. The radial punching mold for cookware according to claim 1, characterized in that: The adjusting baffle is fixedly installed across both sides of the centripetal mold body and is fastened with screws. There is a groove in the middle of the right side of the adjusting baffle. The left end face of the lower punch module is attached to the groove. The adjusting baffle is adjusted to a suitable position in the centripetal mold body and relative to the lower punch module by screws to adapt to ceramic non-stick pan workpieces of different specifications and sizes.

8. The radial punching integral mold for cookware according to claim 1, characterized in that: The pad is equipped with an oiling hole, which makes it easy to add lubricating oil to the mold guide and transmission parts regularly.

9. An assembly method for a radial punching integral mold for cookware as described in claim 1, characterized in that, Includes the following steps: Step 1: Fix the lower template horizontally on the reference surface of the punch press worktable, calibrate the levelness, and ensure that the installation is stable and without shaking; Step 2: Press the guide post vertically into the preset mounting hole of the lower template to ensure the verticality of the guide post. Then, fit the centripetal mold body onto the right guide post and fix it onto the lower template with screws. Install the adjusting baffle and make preliminary adjustment of the positioning position. Place the lower punch module against the right groove of the adjusting baffle and fit the lower die into the corresponding punch hole of the lower punch module. Step 3: Fit the bushing into the corresponding radial guide hole on the horizontal boss on the right side of the radial mold body, insert the upper mold punch, and assemble the spring; Step 4: Insert the guide sleeve into the upper template; assemble the internal hexagonal single-threaded shaft into the upper template and fix the bearing; Step 5: Install the spring adjustment mechanism, install the support spring, install the guide sleeve on the top of the guide post, close the upper template, so that the outer surface of the bearing fits against the top surface of the ball head of the upper die punch, and the upper template can slide smoothly along the guide post; Step 6: Install the pad on top of the upper template, add lubricating oil through the pre-drilled oil hole on the pad, and finally install the polyurethane rubber rod, adjusting its height to effectively press the workpiece.

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