Hardware stamping device capable of achieving rapid discharging

Abstract

The utility model discloses a hardware stamping device of quick discharge, including frame, set up on the workbench, control system, drive mechanism and stamping die set, the stamping die set includes stamping upper die holder and stamping lower die holder, stamping upper die holder is connected to frame top through drive mechanism, stamping lower die holder is connected to frame top through drive mechanism, stamping lower die holder is connected to frame top through drive mechanism, stamping lower die holder is connected to frame top through drive mechanism. The stamping lower die base is arranged on the workbench, the stamping lower die base is provided with a die cavity and a demolding ejection assembly arranged in the die cavity, and a discharging channel is arranged in the workbench. And on the whole, through the automatic discharging mechanism, the punching efficiency is greatly improved. And meanwhile, by optimizing the driving mechanism, the guide assembly and the ejection mechanism, the stamping precision, stability and reliability of the equipment are improved, and the service life is prolonged. The automatic process is further improved, and manual intervention is reduced. The stamping device has the remarkable advantages in the aspects of improving the production efficiency, guaranteeing the product quality and reducing the maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of metal stamping technology, specifically to a metal stamping device with rapid material output. Background Technology

[0002] Stamping, an important process in the hardware manufacturing industry, mainly uses a press to drive a die to apply pressure to a metal sheet, causing it to undergo plastic deformation or separation, thereby obtaining parts of the required shape and size. Traditional stamping equipment typically includes basic components such as an upper die holder, a lower die holder, and a stamping drive mechanism. After stamping, the formed part needs to be ejected from the die cavity through an ejection mechanism.

[0003] Traditional stamping equipment relies on manual prying or gravity dropping for demolding, which can easily lead to workpiece deformation or surface scratches. Conventional ejection mechanisms often use lever-type or spring-return structures, requiring a wait for the mechanism to fully reset after the ejection stroke before the next stroke can begin, resulting in low efficiency. Furthermore, insufficient positioning accuracy allows the die to easily shift during stamping, affecting processing consistency. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a fast-output metal stamping device, which can effectively solve the problems mentioned in the background art.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A fast-output metal stamping device includes a frame, a worktable mounted on the frame, a control system, a drive mechanism, and a stamping die. The stamping die includes an upper stamping die and a lower stamping die. The upper stamping die is connected to the top of the frame via the drive mechanism. The lower stamping die is mounted on the worktable and has a mold cavity and a ejector assembly located within the mold cavity. The worktable has a material discharge channel located on one side of the mold cavity. The ejector assembly includes an ejector plate and an elastic element movably mounted within the lower stamping die. The bottom surface of the ejector plate is connected to the bottom of the mold cavity via the elastic element, and a plurality of ejector rods are evenly distributed on the top surface of the ejector plate.

[0007] As a further description of the above technical solution, the driving mechanism includes a gas-liquid booster cylinder, a piston rod, and a quick-release connector. The end of the piston rod is connected to the upper stamping die seat through the quick-release connector, and a stroke limit sensor is provided on the side wall of the piston rod.

[0008] As a further description of the above technical solution, a guide assembly is also provided between the stamping die base and the frame. The guide assembly includes tapered guide posts located at the four corners of the stamping die base and self-lubricating guide sleeves correspondingly located on the frame.

[0009] As a further description of the above technical solution, the ejector rods are arranged in a matrix, and the top of the ejector rods is provided with a hemispherical protrusion.

[0010] As a further description of the above technical solution, the elastic element includes a nitrogen spring, and a limiting block is provided at the end of the stroke of the nitrogen spring, the limiting block being connected to the lower die holder for stamping.

[0011] As a further description of the above technical solution, the ratio of the large end diameter to the small end diameter of the tapered guide post is 1:0.8, the surface of the tapered guide post is also provided with a spiral oil groove, and the inner wall of the self-lubricating guide sleeve is provided with guide patterns that match the spiral oil groove.

[0012] As a further description of the above technical solution, the gas-liquid booster cylinder is equipped with an accumulator and a high-pressure oil pipe, and the accumulator is connected to the gas-liquid booster cylinder through the high-pressure oil pipe.

[0013] As a further description of the above technical solution, the side of the workbench is provided with an inclined material collection trough connected to the material discharge channel, the bottom of the material collection trough is provided with a vibrator, and the inclination angle of the material collection trough is 15-30°.

[0014] As a further description of the above technical solution, a pressure sensor is provided on the bottom surface of the catapult plate, and the pressure sensor is connected to the control system signal.

[0015] As a further description of the above technical solution, the inner wall of the mold cavity is provided with a retainer and a number of balls. The balls are distributed in a spiral shape through the retainer. An elastic scraper is also provided at the opening of the mold cavity. The elastic scraper is connected to the ejector rod, and the movement trajectory of the elastic scraper and the ejector rod forms an angle of 30-45°.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The present invention provides a fast-output metal stamping device, which has at least one of the following beneficial effects during use:

[0018] Overall, the automated unloading mechanism significantly improves stamping efficiency. Simultaneously, optimization of the drive mechanism, guiding components, and ejection mechanism enhances the stamping accuracy, stability, and reliability of the equipment, while extending its service life. The addition of a pressure sensor improves the overall system safety. The inclined chute design further refines the automated process, reducing manual intervention. These features give this stamping unit significant advantages in improving production efficiency, ensuring product quality, and reducing maintenance costs. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall structure of a fast-output metal stamping device according to the present invention.

[0020] Figure 2 This is a side view of the hardware stamping device for rapid material output according to the present invention.

[0021] Figure 3 This is a perspective structural diagram of a hardware stamping device for rapid material output according to the present invention.

[0022] Numbering on the map:

[0023] 1. Frame; 101. Workbench; 102. Control system; 103. Material collection trough; 104. Self-lubricating guide sleeve; 105. Conical guide post; 106. Material discharge channel; 107. Spiral oil groove; 2. Stamping module; 201. Upper stamping die base; 202. Lower stamping die base; 203. Demolding ejector assembly; 204. Ejector plate; 205. Ejector rod; 206. Mold cavity; 207. Nitrogen spring; 208. Limiting block; 3. Drive mechanism; 301. Gas-liquid booster cylinder; 302. Quick-release connector; 303. Piston rod; 304. Stroke limit sensor. Detailed Implementation

[0024] 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.

[0025] like Figure 1-3 As shown, this utility model provides a fast-output metal stamping device, including a frame 1, a worktable 101 mounted on the frame 1, a control system 102, a drive mechanism 3, and a stamping module 2. The stamping module 2 includes an upper stamping die holder 201 and a lower stamping die holder 202. The upper stamping die holder 201 is connected to the top of the frame 1 via the drive mechanism 3. The lower stamping die holder 202 is mounted on the worktable 101 and has a die cavity. 206 and a demolding ejection assembly 203 disposed in the mold cavity 206. The worktable 101 is provided with a material discharge channel 106, which is located on one side of the mold cavity 206. The demolding ejection assembly 203 includes an ejection plate 204 and an elastic element movably disposed in the lower stamping die base 202. The bottom surface of the ejection plate 204 is connected to the bottom of the mold cavity 206 through the elastic element. A plurality of ejection ejector rods 205 are evenly distributed on the top surface of the ejection plate 204.

[0026] In this embodiment, during use, after receiving instructions from the control system 102, the drive mechanism 3 (pneumatic-hydraulic booster cylinder 301) pushes the piston rod 303 (stroke accuracy ±0.05mm) to drive the upper stamping die 201 to press vertically downwards, closing with the die cavity 206 of the lower stamping die 202, thus completing the stamping of the hardware part. The pneumatic-hydraulic booster cylinder 301 outputs a pressure of 20-25MPa, and the accumulator maintains stable oil pressure through a high-pressure oil pipe to ensure that the power does not decrease during continuous stamping.

[0027] After stamping, the pneumatic-hydraulic booster cylinder 301 returns, causing the upper die base to rise. At this time, the nitrogen spring 207 (stroke 10mm) releases pre-compression energy, pushing the ejector plate 204 upward. The matrix-arranged ejector pins 205 (spaced 2mm apart) simultaneously contact the bottom surface of the workpiece. The hemispherical protrusions at the top of the ejector pins disperse the contact pressure, preventing workpiece deformation.

[0028] When the ejector pin 205 rises, it drives the elastic scraper (at a 40° angle with the ejector pin's trajectory) to scrape away debris from the inner wall of the mold cavity 206; the spiral ball bearings (with a friction coefficient of 0.15) inside the mold cavity 206 reduce demolding resistance.

[0029] The tapered guide post 105 (large end Φ20mm, small end Φ16mm) is inserted into the guide groove of the self-lubricating guide sleeve 104 to ensure that the alignment error of the upper and lower mold bases is ≤0.1mm. After the nitrogen spring 207 resets, the ejector plate 204 is fixed in its initial position by the limit block 208, ready for the next stamping cycle.

[0030] Furthermore, the drive mechanism 3 includes a pneumatic-hydraulic booster cylinder 301, a piston rod 303, and a quick-release connector 302. The end of the piston rod 303 is connected to the upper stamping die base 201 through the quick-release connector 302, and the side wall of the piston rod 303 is provided with a stroke limit sensor 304.

[0031] The pneumatic-hydraulic booster cylinder 301 employs a pneumatic-driven hydraulic oil structure. Compressed air (0.6-0.8MPa) pushes the piston of a large-diameter pneumatic cylinder, which is then transmitted to the piston of a small-diameter hydraulic cylinder via hydraulic oil, achieving pressure amplification (boost ratio up to 10:1), with an output pressure of 20-25MPa. The quick-release connector 302 adopts an ISO 16028 standard male-female head structure. The male end (mounted on the piston rod 303) has a spring-locking groove, and the female end (fixed to the upper mold base) has a tapered guide surface. Locking is achieved by rotating 45°, with a connection time ≤5 seconds. The connector's interior is equipped with a tungsten carbide wear-resistant bushing (hardness HRC62), capable of withstanding axial impact forces ≥50kN, preventing loosening of the connector due to high-frequency stamping (e.g., 120 times / minute).

[0032] Furthermore, a guide assembly is provided between the stamping die holder 202 and the frame 1. The guide assembly includes tapered guide posts 105 located at the four corners of the stamping die holder 202 and self-lubricating guide sleeves 104 correspondingly located on the frame 1.

[0033] The tapered guide post 105 adopts a 1:10 tapered design with a small end diameter of Φ18mm and a large end diameter of Φ25mm. When the lower die 202 is pressed down, the large end of the guide post first contacts the guide surface of the self-lubricating guide sleeve 104. The gap is gradually reduced through the tapered surface contact, and finally the coaxiality error of the upper and lower die 205 is ≤0.03mm.

[0034] The inner wall of the self-lubricating guide sleeve 104 is embedded with graphite-copper-based composite material (containing 15% graphite and 5% molybdenum disulfide) to form a self-lubricating layer with a friction coefficient as low as 0.08 (0.12 for traditional grease lubrication), eliminating the need for external oil supply.

[0035] Furthermore, the ejector rods 205 are arranged in a matrix, and the top of each ejector rod 205 is provided with a hemispherical protrusion.

[0036] The ejector pins 205 are arranged in a 10×10 matrix (15mm×15mm spacing), each pin has a diameter of Φ6mm and a hemispherical protrusion at the top with a radius of R3mm. During ejection, the pin array forms 100 evenly distributed contact points, with a unit area pressure ≤0.5MPa, preventing deformation of thin-walled parts (such as 0.2mm aluminum shells) during ejection.

[0037] The hemispherical protrusion forms a point contact with the workpiece surface, with a contact area of ​​only 0.28 mm². 2 (Traditional flat-top structure is 28mm) 2 Frictional resistance is reduced by 99%. When the workpiece is tilted by 0.5°, the hemispherical surface can automatically compensate for the angular deviation, ensuring that the normal component of the ejection force accounts for ≥95%.

[0038] Furthermore, the elastic element includes a nitrogen spring 207, and a limiting block 208 is provided at the end of the stroke of the nitrogen spring 207. The limiting block 208 is connected to the stamping lower die base 202.

[0039] The nitrogen spring 207 is filled with 15MPa high-pressure nitrogen. During the compression stroke (typical stroke 50mm), the compressibility of nitrogen achieves a non-linear elastic force curve, with working force fluctuation ≤±3% (mechanical spring fluctuation ±15%). The limit stop 208 is made of YG8 cemented carbide (hardness HRA89) and maintains a 0.05mm gap with the end of the piston rod 303 of the nitrogen spring 207. When the compression reaches 45mm, the mechanical limit is triggered to prevent over-compression and seal failure.

[0040] Furthermore, the ratio of the large end diameter to the small end diameter of the tapered guide post 105 is 1:0.8, and the surface of the tapered guide post 105 is also provided with a spiral oil groove 107. The inner wall of the self-lubricating guide sleeve 104 is provided with guide patterns that match the spiral oil groove 107.

[0041] The inner wall of the guide sleeve is machined with a spiral oil groove 107 with a depth of 0.5mm and a pitch of 8mm to store a small amount of lubricating oil film, which can maintain the lubrication effect during continuous operation (such as 1000 times / hour).

[0042] Furthermore, the pneumatic-hydraulic booster cylinder 301 is equipped with an accumulator and a high-pressure oil pipe. The accumulator is connected to the pneumatic-hydraulic booster cylinder 301 via the high-pressure oil pipe. An accumulator (2L capacity) is installed in the hydraulic circuit to absorb pressure fluctuations, ensuring the pressure curve fluctuation rate is ≤3%, thus preventing cracks caused by sudden pressure changes during workpiece forming. The stroke limit sensor 304 is a magnetostrictive displacement sensor (0.01mm resolution) that monitors the position of the piston rod 303 in real time. The signal is fed back to the PLC control system 102 to dynamically adjust the opening of the air intake valve of the pneumatic-hydraulic booster cylinder 301.

[0043] Furthermore, the workbench 101 is provided with an inclined material collection trough 103 on its side, connected to the material discharge channel 106. A vibrator is provided at the bottom of the material collection trough 103, and the inclination angle of the material collection trough 103 is 15-30°. The ejected workpiece slides into the inclined material collection trough 103 at 25° through the material discharge channel 106 on the side of the mold cavity 206. The vibrator assists in the directional movement of the workpiece to the collection box at a frequency of 30Hz.

[0044] Furthermore, a pressure sensor is provided on the bottom surface of the catapult plate 204, and the pressure sensor is connected to the control system 102. The pressure sensor (model DYLY-101) at the bottom of the catapult plate 204 monitors the catapult force in real time. If it exceeds the set value (e.g., 800N±5%), it immediately triggers the shutdown protection.

[0045] Furthermore, the inner wall of the mold cavity 206 is provided with a retainer and a number of balls. The balls are spirally distributed through the retainer. An elastic scraper is also provided at the opening of the mold cavity 206. The elastic scraper is connected to the ejector rod 205, and the movement trajectory of the elastic scraper and the ejector rod 205 forms an angle of 30-45°.

[0046] In summary, the ejector pin 205 driven by the nitrogen spring 207 can complete demolding within 0.6 seconds, which is 300% more efficient than traditional gravity demolding (average 2 seconds / cycle). The hemispherical protrusion design reduces workpiece contact stress by 60%, and the workpiece surface scratch rate drops from 15% to below 2%. The tapered guide post 105, in conjunction with the self-lubricating guide sleeve 104, extends the lubrication cycle to 8 hours / cycle, and the guide system has a service life of 500,000 stamping cycles. The spiral oil groove 107 stores a lubricating oil film, ensuring that the mold offset remains stable within ±0.05mm even under continuous stamping conditions (e.g., 1000 times / hour). The elastic scraper and vibrator work together to extend the mold cavity 206 cleaning cycle to 72 hours, reducing the frequency of downtime for cleaning. The inclined material collection groove 103, in conjunction with the vibrator, achieves a workpiece sliding speed of 1.2m / s, enabling a high-efficiency output of 60 pieces per minute. The pressure sensor is linked with the PLC, and can stop the machine within 0.1 seconds in case of abnormal pressure fluctuations (such as mold jamming), reducing the equipment failure rate by 90%.

[0047] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fast discharge hardware stamping device, comprising a frame, a workbench arranged on the frame, a control system, a driving mechanism and a stamping die set, characterized in that, The stamping die set comprises a stamping upper die seat and a stamping lower die seat, the stamping upper die seat is connected to the top of the frame through a driving mechanism, the stamping lower die seat is arranged on the workbench, the stamping lower die seat is provided with a die cavity and a demolding ejection assembly arranged in the die cavity, the workbench is provided with a blanking channel, the blanking channel is arranged on one side of the die cavity, the demolding ejection assembly comprises an ejection plate movably arranged in the stamping lower die seat and an elastic element, the bottom surface of the ejection plate is connected to the bottom of the die cavity through the elastic element, and the top surface of the ejection plate is uniformly distributed with a plurality of ejection top rods.

2. A quick discharge hardware stamping device as claimed in claim 1, wherein, The driving mechanism comprises a gas-liquid booster cylinder, a piston rod and a quick release joint, the end of the piston rod is connected to the stamping upper die seat through the quick release joint, and the side wall of the piston rod is provided with a stroke limiting sensor.

3. A quick discharge hardware stamping device as claimed in claim 1, wherein, The stamping lower die seat and the frame are further provided with a guide assembly, the guide assembly comprises conical guide columns arranged at the four corners of the stamping lower die seat and self-lubricating guide sleeves correspondingly arranged on the frame.

4. The quick discharge hardware stamping device of claim 1, wherein, The ejection top rods are arranged in a matrix, and the top end of each ejection top rod is provided with a hemispherical protrusion.

5. A quick discharge hardware stamping device as claimed in claim 1, wherein, The elastic element comprises a nitrogen spring, the stroke end of the nitrogen spring is provided with a limiting stopper, and the limiting stopper is connected to the stamping lower die seat.

6. A quick discharge hardware stamping device as claimed in claim 3, wherein, The ratio of the large end diameter to the small end diameter of the conical guide column is 1:0.8, the surface of the conical guide column is further provided with a spiral oil groove, and the inner wall of the self-lubricating guide sleeve is provided with a guide pattern matched with the spiral oil groove.

7. A quick discharge hardware stamping device as claimed in claim 2, wherein, The gas-liquid booster cylinder is provided with an accumulator and a high-pressure oil pipe, and the accumulator is connected to the gas-liquid booster cylinder through the high-pressure oil pipe.

8. A quick discharge hardware stamping device as claimed in claim 1, wherein, The side of the workbench is provided with an inclined material collecting groove connected to the blanking channel, the bottom of the material collecting groove is provided with a vibrator, and the inclination angle of the material collecting groove is 15-30°.

9. A quick discharge hardware stamping device as claimed in claim 1, wherein, The bottom surface of the ejection plate is provided with a pressure sensor, and the pressure sensor is signal-connected to a control system.

10. The quick discharge hardware stamping device of claim 1, wherein, The inner wall of the die cavity is provided with a retainer and a plurality of balls, the balls are distributed in a spiral shape through the retainer, the opening of the die cavity is further provided with an elastic scraper, the elastic scraper is connected to the ejection top rod, and the elastic scraper and the ejection top rod form an included angle of 30-45° in the movement track.

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