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CN-120984742-B - Stamping method for rapid intelligent hardware product

CN120984742BCN 120984742 BCN120984742 BCN 120984742BCN-120984742-B

Abstract

The invention relates to a stamping method of a quick intelligent hardware product, which belongs to the technical field of intelligent stamping of the hardware product, and solves the rebound problem through the combined action of temperature gradient control and zonal mechanical compensation, wherein a heating and cooling unit is arranged at a bending station, a tension zone at the outer side is pre-pressed through a low friction coating material pressing plate and a high-strength spring, the tension fracture is relieved, a pressure zone at the inner side is pressed, a multi-stiffness spring group is matched through a stepped material ejection block design, the zonal elastic relief is realized, redundant materials are absorbed to inhibit wrinkling, a wedge-shaped ejector rod and a wedge-shaped floating sliding block are designed at a transition zone, the material is ejected in the middle and later stages of bending to actively pre-compress to counteract rebound, in addition, a bending force curve is monitored in real time through intelligent closed-loop control, the deviation of theoretical values is compared, and the temperature control parameter and the bending speed are self-adaptively adjusted until the rebound quantity is stabilized within an error range, so that the problems of how to synchronously inhibit bending defects and accurately control the rebound quantity in the continuous stamping process in the prior art are solved.

Inventors

  • LI ZHENGGUO

Assignees

  • 揭阳市慧士五金实业有限公司

Dates

Publication Date
20260512
Application Date
20250930

Claims (9)

  1. 1. The stamping method of the quick intelligent hardware product is characterized by comprising the following steps of: The method comprises the steps of S1, setting a temperature control module at a bending station of a progressive stamping die, firstly defining an outer side of a bending line of the bending station of the progressive stamping die and an upper die fillet contact area as an outer tension area, then defining an inner side of the bending line of the bending station of the progressive stamping die and a lower die fillet support area as an inner compression area, defining an area of the bending station of the progressive stamping die between the inner compression area and the outer tension area as a transition area, setting a material pressing plate with a low friction coating at an upper die fillet of the outer tension area, pre-pressing the material pressing plate through a high-strength spring pre-pressing mechanism, setting a stepped ejector block at a lower die fillet support area of the inner compression area, supporting the ejector block by spring groups with different rigidities, setting a plurality of wedge-shaped ejector rods in the lower die of the transition area and in close contact with a wedge-shaped floating sliding block, and supporting the wedge-shaped floating sliding block through a strong spring; S2, after uncoiling and straightening the stainless steel coil plate, intermittently feeding the stainless steel coil plate into a progressive stamping die by a servo feeding mechanism at a preset step distance; S3, when the material enters a bending station, starting a temperature control module through an intelligent control system, so that the temperature of the surface layer of the material in the bending area is raised to 150-300 ℃ and the core part is kept at normal temperature, and forming a temperature gradient from the outside to the inside; s4, bending is carried out on the upper die at a constant speed in the continuous period of the temperature gradient, and meanwhile, a pressure sensor is adopted to monitor the bending force in real time; S5, drawing a bending force curve in the intelligent control system according to the theoretical value of the bending force in advance, The intelligent control system adaptively adjusts the temperature control parameters and the bending speed of the next process step according to the deviation ratio of the bending force curve monitored by the pressure sensor to the theoretical value until the bending resilience is stabilized within a specified error range in the continuous production process.
  2. 2. The stamping method of the rapid intelligent hardware product according to claim 1, wherein the temperature control module comprises a heating unit embedded into an upper die of a bending station and a circulating cooling channel of a lower die, the stainless steel coil plate is bent in place and then is maintained in pressure, and constant-temperature cooling liquid is introduced into the circulating cooling channel during the period to accelerate stress release.
  3. 3. The stamping method of the rapid and intelligent hardware product according to claim 1, wherein in the bending stroke, a material pressing plate at a fillet of the upper die in the step S1 contacts with an inclined surface of a wedge-shaped floating slide block in the transition zone, and the wedge-shaped floating slide block is forced to be driven to horizontally move by extrusion, so that a wedge-shaped ejector rod in the transition zone is pushed to vertically push up and press materials.
  4. 4. The stamping method of the quick intelligent hardware product according to claim 1, wherein the step-shaped ejector block in the step S1 adopts a split type structure and comprises a main ejector block and at least two auxiliary ejector blocks, the main ejector block is matched with the rounded outline of the lower die, and the auxiliary ejector blocks are linked with the main ejector block through inclined plane sliding blocks.
  5. 5. The stamping method of the quick intelligent hardware product according to claim 1, wherein a T-shaped guide groove is formed in the bottom of the wedge-shaped floating sliding block in the step S1, the T-shaped guide groove is in sliding fit with a T-shaped guide rail formed in the lower die, and limit stops are arranged at two ends of the T-shaped guide rail.
  6. 6. The stamping method of the rapid and intelligent hardware product according to claim 1, wherein the strong springs in the step S1 are of concentric sleeve type multi-spring group structures, the strong springs comprise a central main spring and auxiliary springs which are arranged in a surrounding mode, and the upper ends of the central main spring and the auxiliary springs are integrally stressed through a floating pressing plate.
  7. 7. The stamping method of the rapid and intelligent hardware product according to claim 1, wherein a spherical cushion block is arranged on the back surface of the low-friction coating pressing plate in the step S1, a spherical seat is arranged on the upper die, and the spherical cushion block and the spherical seat arranged on the upper die form a self-adjusting joint structure.
  8. 8. The stamping method of the quick intelligent hardware product according to claim 1, wherein the wedge-shaped ejector rod in the transition area in the step S1 adopts a stepped shaft structure, an annular flange is arranged in the middle of a rod body of the wedge-shaped ejector rod, a stepped hole is formed in the lower die, and the annular flange and the stepped hole form up-down bidirectional limiting.
  9. 9. The method for stamping a rapid and intelligent hardware product according to claim 1, wherein the high-strength spring pre-compression mechanism in the step S1 comprises an eccentric adjusting wheel, the pre-compression amount of the spring is changed by rotating the eccentric adjusting wheel, and anti-slip insections are arranged on the periphery of the eccentric adjusting wheel.

Description

Stamping method for rapid intelligent hardware product Technical Field The invention belongs to the technical field of intelligent stamping of hardware products, and particularly relates to a stamping method of a quick intelligent hardware product. Background With the improvement of the dual demands of the hardware industry on the production efficiency and the precision, the progressive stamping technology adopting the coiled plate type stainless steel material has become the core manufacturing technology of core components such as sliding rails, hinges and the like, The technology realizes rapid production by sequentially completing steps of punching, bending, forming and the like on materials through a plurality of stations on a die, however, when the technology is used for processing stainless steel materials, problems are encountered that as the stainless steel is high in strength and harder in pressing, tiny cracks are easily generated when the outer side materials are elongated during bending, the inner side materials are easy to wrinkle when being extruded, the die is loosened after the bending is finished, the materials rebound, the final bending angle and the design requirement are excessively large, the deviation often exceeds the allowable range, and in addition, the assembly precision of the sliding rail and the durability life of the hinge can be seriously influenced by the angle misalignment. The two methods are commonly used in the industry at present, namely, stress is eliminated by adding annealing and heating materials midway, but the continuous production flow is broken, and the high-efficiency advantage is lost; secondly, excessive bending compensation is carried out, the target angle is deliberately exceeded during bending, and the bending is exactly in place after rebound, but the compensation amount is adjusted by manually repeating trial and error, the debugging takes hours, and once the material batch is changed, the effect is unstable, so that for a complex multi-section bending structure on a sliding rail and a precise rotating shaft part on a hinge, the production efficiency is hardly ensured, the bending shape and the angle are precisely controlled by the existing technology, and therefore, a new and rapid intelligent stamping method is urgently needed to be developed to solve the problems. Disclosure of Invention In order to solve the problems in the prior art, the invention provides a stamping method of a quick intelligent hardware product, which solves the problems of how to synchronously inhibit bending defects and accurately control rebound quantity in a continuous stamping process in the prior art and realize efficient and stable intelligent production. The aim of the invention can be achieved by the following technical scheme: a stamping method of a quick intelligent hardware product comprises the following steps: The method comprises the steps of S1, setting a temperature control module at a bending station of a progressive stamping die, firstly defining an outer side of a bending line of the bending station of the progressive stamping die and an upper die fillet contact area as an outer tension area, then defining an inner side of the bending line of the bending station of the progressive stamping die and a lower die fillet support area as an inner compression area, defining an area of the bending station of the progressive stamping die between the inner compression area and the outer tension area as a transition area, setting a material pressing plate with a low friction coating at an upper die fillet of the outer tension area, pre-pressing the material pressing plate through a high-strength spring pre-pressing mechanism, setting a stepped ejector block at a lower die fillet support area of the inner compression area, supporting the ejector block by spring groups with different rigidities, setting a plurality of wedge-shaped ejector rods in the lower die of the transition area and in close contact with a wedge-shaped floating sliding block, and supporting the wedge-shaped floating sliding block through a strong spring; S2, after uncoiling and straightening the stainless steel coil plate, intermittently feeding the stainless steel coil plate into a progressive stamping die by a servo feeding mechanism at a preset step distance; s3, when the material enters the bending station, starting a temperature control module through an intelligent control system; s4, bending is carried out on the upper die at a constant speed in the continuous period of the temperature gradient, and meanwhile, a pressure sensor is adopted to monitor the bending force in real time; And S5, drawing a bending force curve in advance in an intelligent control system according to the theoretical value of the bending force, and comparing the bending force curve monitored by the pressure sensor with the deviation value of the theoretical value by the intelligent control system, and adaptively adjusting th