Search

CN-118848454-B - Manufacturing method of energy-saving chlorine-washing-resistant dual-phase steel hand mold palm part

CN118848454BCN 118848454 BCN118848454 BCN 118848454BCN-118848454-B

Abstract

The application relates to an energy-saving chlorine-washing-resistant dual-phase steel hand mold palm portion manufacturing method which comprises the following steps of carrying out reverse stretching on a metal plate, reversely stretching out a reverse convex hull at a middle finger position of a preformed palm portion of the metal plate to form a preformed material sheet, carrying out forward stretching forming on the preformed material sheet to obtain a blank left half palm or a blank right half palm of the palm portion, carrying out edge cutting on the outline of the blank left half palm and the blank right half palm to obtain a left half palm and a right half palm, and carrying out butt welding on the left half palm and the right half palm to form the palm portion, wherein the step S100 is carried out. The application solves the problem of stretching cracking in the palm manufacturing process.

Inventors

  • ZHANG CHENGHAO
  • ZHU SHIJIAN
  • LI QIANG
  • HE PING
  • LI SAI
  • Ke Yaoqun
  • XU YULONG

Assignees

  • 台州市真浩科技有限公司

Dates

Publication Date
20260505
Application Date
20240729

Claims (7)

  1. 1. The manufacturing method of the energy-saving chlorine-washing-resistant dual-phase steel hand mold palm part is characterized by comprising the following steps of: Step S100, carrying out reverse stretching on the metal plate (1), and reversely stretching out a reverse convex hull (2) at the middle finger position of the preformed palm part of the metal plate (1) to form a preformed web; step S200, forward stretching and forming are carried out on the preformed material sheet so as to obtain a left half palm of a blank or a right half palm of the blank of the palm part; Step S300, trimming the outline of the left half palm of the blank and the outline of the right half palm of the blank to obtain the left half palm and the right half palm; step S400, welding the left half palm and the right half palm in a butt joint way to form a palm part; in step S200, the steps of: Step S210, placing the preformed web in a forming die; Step S220, forward stretch forming is carried out on the two middle finger joints and the two side finger joints of the preformed palm part in the preformed sheet by a forming die according to the sequence of sequential forming; Step S230, after forward stretching and forming, the preformed web is subjected to forward stretching and forming to obtain a left half palm of a blank or a right half palm of the blank of the palm part; the forming die comprises an upper die (3) and a lower die (4) matched with the upper die (3); The upper die (3) comprises an upper die holder (31), an upper die cushion plate (32), an upper die plate (33) and an upper die pressing plate (34) which are sequentially arranged, an upper die cavity (36) is formed in the lower surface of the upper die plate (33), the upper die pressing plate (34) surrounds the upper die plate (33), an upper die pressing spring (35) connected with the upper die pressing plate (34) is arranged in the upper die cushion plate (32), two heel forming parts (37) are arranged in the upper die plate (33), and the two heel forming parts (37) extend into the upper die cavity (36) and are positioned at two middle joint positions; The lower die (4) comprises a lower die holder (41), a lower die plate (42) and a lower die pressing plate (43) which are sequentially arranged, a lower die cavity (44) is formed in the upper surface of the lower die plate (42), the lower die cavity (44) is matched with the upper die cavity (36), the lower die pressing plate (43) is arranged outside the lower die plate (42) in a surrounding mode and opposite to the upper die pressing plate (34), and a driving part (45) for driving the lower die pressing plate (43) to lift is arranged on the lower die holder (41); The finger heel forming part (37) comprises a finger heel mounting groove (371) arranged in the upper template (33) and a finger heel forming block (372) arranged in the finger heel mounting groove (371), the finger heel mounting groove (371) is communicated with the upper die cavity (36), the finger heel forming block (372) stretches into the upper die cavity (36), and a finger heel nitrogen spring (373) connected with the finger heel forming block (372) is arranged in the upper die cushion plate (32).
  2. 2. The method for manufacturing the energy-saving chlorine-washing-resistant dual-phase steel hand mold palm portion according to claim 1, wherein in the step S100, the reverse convex hull (2) is only arranged at the middle finger position of the preformed palm portion of the metal plate (1).
  3. 3. The manufacturing method of the energy-saving chlorine-washing-resistant dual-phase steel hand mold palm portion is characterized in that the arc radian R of the edge of a reverse convex hull (2) is more than 15mm, the height of the reverse convex hull (2) is 1/6 to 1/4 of the height of the palm portion, and the girth of the reverse convex hull (2) is larger than 1/2 of the girth of the outline of the palm portion.
  4. 4. The method for manufacturing the palm portion of the energy-saving chlorine-washing-resistant dual-phase steel hand mold according to claim 1, further comprising the following steps between the step S100 and the step S200: Step S110, heating the preformed web to 750-900 ℃ at a heating rate of 50-200 ℃ per second, and preserving heat for 10-40 seconds; in step S120, the preformed web is protected by an inert gas during heating.
  5. 5. The method for manufacturing the energy-saving chlorine-washing-resistant dual-phase steel hand mold palm portion according to claim 1, wherein the lower surface of the heel forming block (372) is provided with a V-shaped forming end (376), a first forming surface (377) and a second forming surface (378) are formed on two sides of the V-shaped forming end (376) on the lower surface of the heel forming block (372), and the V-shaped forming end (376) of the heel forming block (372) is used for forming a finger seam root portion of the palm portion; when the heel forming block (372) is not pressed, the upper surface of the heel forming block (372) is horizontal, and after the heel forming block (372) is pressed into the heel mounting groove (371), the second forming surface (378) is horizontal.
  6. 6. The manufacturing method of the energy-saving chlorine-washing-resistant dual-phase steel hand mold palm portion according to claim 1, wherein a finger heel limiting block (38) is arranged in the finger heel mounting groove (371), a limiting inclined surface (39) is arranged on the lower surface of the finger heel limiting block (38), and the limiting inclined surface (39) is used for abutting against the upper surface of the finger heel forming block (372) when the finger heel forming block (372) is pressed into the finger heel mounting groove (371).
  7. 7. The manufacturing method of the energy-saving chlorine-washing-resistant dual-phase steel hand mold palm portion according to claim 1, wherein the driving portion (45) comprises a fixing plate (451) arranged on a lower mold base (41) and a push rod (452) slidably installed on the fixing plate (451), the push rod (452) is connected with the lower mold pressing plate (43), and a driving hydraulic cylinder is arranged on the fixing plate (451).

Description

Manufacturing method of energy-saving chlorine-washing-resistant dual-phase steel hand mold palm part Technical Field The application relates to the technical field of metal hand mold manufacturing, in particular to an energy-saving chlorine-washing-resistant dual-phase steel hand mold palm portion manufacturing method. Background At present, ultra-thin and ultra-strong polymer film forming products such as latex, silica gel, PVC, butyronitrile and the like are required to develop, the yield is increased, the energy consumption is reduced, the cost is reduced, and the ultra-thin and ultra-strong polymer film forming products are important factors for creating good living space and development environment for enterprises. At present, the stainless steel product material has stable product dimensional accuracy, good heat conduction and corrosion resistance, and the plate can have various thicknesses, and the characteristics of the stainless steel product material just meet the production requirements of products such as latex, silica gel, PVC, butyronitrile and the like. Namely, the requirements of mass production, low processing cost, high production efficiency, light weight, high rigidity, high heat conduction, corrosion resistance, high temperature resistance, oxidation resistance and the like, stainless steel metal hand molds are therefore increasingly being used in glove production. Among them, 2507 stainless steel is a duplex stainless steel having excellent corrosion resistance and high strength, can work in strong corrosion and high pressure environments, and its duplex structure makes it have good plasticity and toughness, will not crack and deform during cooling, and also has good heat resistance and wear resistance, and is very suitable for applications in high temperature, high pressure and wear environments. The excellent mechanical property and corrosion resistance of the dual-phase steel just meet the production requirements of glove enterprises. The stainless steel metal hand mold is divided into a palm part, a wrist cylinder part and a base part, wherein the wrist cylinder part is a middle part for connecting the palm part and the base part, the wrist cylinder part is connected with the palm part through welding, and the base part is connected with the wrist cylinder part through welding. For the related art, the ductility of the 304 and 316 stainless steels is 40% -50% and the ductility of the dual-phase steel is 25% due to the large difference between the ductility of the dual-phase steel and the ductility of the 304 and 316 stainless steels. The inventor found that there is a certain improvement in the case of forming the palm portion because the deformation amount of the joints between the fingers and the palm is large, that is, the stretch-break is easily generated in the joints between the fingers and the palm at the time of forming. Disclosure of Invention In order to solve the problem of stretching cracking in the palm manufacturing process, the application provides an energy-saving chlorine-washing-resistant dual-phase steel hand mold palm manufacturing method. The application provides a manufacturing method of an energy-saving chlorine-washing-resistant dual-phase steel hand mold palm part, which adopts the following technical scheme: the manufacturing method of the energy-saving chlorine-washing-resistant dual-phase steel hand mold palm part comprises the following steps: step S100, reversely stretching the metal plate, reversely stretching out a reverse convex hull at the middle finger position of the preformed palm part of the metal plate to form a preformed web; step S200, forward stretching and forming are carried out on the preformed material sheet so as to obtain a left half palm of a blank or a right half palm of the blank of the palm part; Step S300, trimming the outline of the left half palm of the blank and the outline of the right half palm of the blank to obtain the left half palm and the right half palm; step S400, welding the left half palm and the right half palm in a butt joint way to form a palm part. Preferably, in step S100, the reverse convex hull is provided only at the middle finger position of the palm portion of the sheet metal preform. Preferably, the arc radian R of the reverse convex hull edge is more than 15mm, the reverse convex hull height is 1/6 to 1/4 of the palm portion height, and the girth of the reverse convex hull is greater than 1/2 of the girth of the palm portion contour. Preferably, the following steps are further included between step S100 and step S200: Step S110, heating the preformed web to 750-900 ℃ at a heating rate of 50-200 ℃ per second, and preserving heat for 10-40 seconds; in step S120, the preformed web is protected by an inert gas during heating. Preferably, in step S200, the steps include: step S210, placing the preformed sheet in a forming die; Step S220, forward stretch forming is carried out on the two middle finger joints a