Method for manufacturing palm part of stainless steel metal hand mold

Abstract

The invention relates to a manufacturing method for a palm part of a stainless steel metal hand mold, which comprises the following steps: step S100, a metal plate is stretched and formed to obtain an upper half palm plate and a lower half palm plate, and the upper half palm plate and the lower half palm plate are provided with palm part areas; s200, alloy metal glue is smeared on the upper half palm plate and / or the lower half palm plate along the contour line of the palm area; s300, after the upper half palm plate and the lower half palm plate are folded and positioned, high-temperature heating is conducted to form an initial blank palm; and step S400, cutting off slitter edges of the palm of the initial blank along the contour line of the palm region to obtain a palm part. The method has the effects of simplifying the production process, reducing the production cost and improving the product production quality.

Description

Technical Field

[0001] The present application relates to the technical field of metal hand mold production, and in particular to a method for producing the palm portion of a stainless steel metal hand mold. Background Art

[0002] The development needs of the latex, silicone, PVC, nitrile and other polymer film-forming products industries (such as the glove industry), increasing production, reducing energy consumption, reducing costs, and energy saving and consumption reduction are important factors for enterprises to create a good living space and development environment. Metal hand molds have stable product dimensional accuracy, good thermal conductivity, and corrosion resistance. These characteristics just meet the production requirements of latex, silicone, PVC, nitrile and other products. Therefore, stainless steel metal hand molds have gradually become a new product that subverts ceramic models.

[0003] The stainless steel metal hand mold is divided into the palm part, the wrist part and the base part. The wrist part is the middle part connecting the palm part and the base part. The wrist part and the palm part are connected by welding, and the base part and the wrist part are connected by welding. After the palm part is made of stainless steel sheet metal by stretching and stamping, the upper and lower palms are first assembled together by a jig, and then spot welding is performed along the joint seam, and then laser welding is used to weld along the joint seam.

[0004] With regard to the above-mentioned related technologies, the inventor believes that there are problems such as leaking welds, cold welds and sand holes in the welding of splicing seams. These defects require manual repair welding, and grinding and polishing after repair welding is time-consuming and labor-intensive. In addition, due to the lack of precise positioning when assembling the upper and lower palms, assembly deviations are prone to occur. At the same time, the palm has a slight rebound after stamping and trimming, which will also cause welding step differences. Therefore, the overall production quality needs to be improved. Summary of the invention

[0005] In order to improve the production quality of the palm, the present application provides a method for making the palm of a stainless steel metal hand mold.

[0006] The palm production method of a stainless steel metal hand mold provided in the present application adopts the following technical solution: A method for making a palm portion of a stainless steel metal hand mold comprises the following steps: Step S100, stretching a metal sheet to obtain an upper palm sheet and a lower palm sheet, wherein the upper palm sheet and the lower palm sheet have a palm area; Step S200, applying alloy metal glue on the upper palm plate and / or the lower palm plate along the contour line of the palm area; Step S300, the upper palm plate and the lower palm plate are aligned and positioned, and then heated at high temperature to form a preliminary palm; Step S400, the palm of the rough blank is cut off along the contour line of the palm area to obtain the palm part.

[0007] Preferably, after step S100, the following steps are further included: Step S110, shaping the palm regions of the upper palm plate and the lower palm plate, and shaping the bottom edge curvature R of the palm region to R=0 mm.

[0008] Preferably, after step S100, the following steps are further included: Step S120: punching a plurality of positioning holes around the palm area of ​​the upper palm plate and the lower palm plate, wherein the positioning holes are located at the same position on the upper palm plate and the lower palm plate.

[0009] Preferably, in step S300, the upper palm plate and the lower palm plate are placed in a clamping fixture for positioning and fixing, and the clamping fixture is sent into a tunnel-type heating furnace for high-temperature heating.

[0010] Preferably, the heating temperature of the tunnel type heating furnace is 900-1000° C., and an inert gas is introduced into the tunnel type heating furnace for protection when the clamping fixture is heated at high temperature.

[0011] Preferably, the clamping fixture includes an upper clamp and a lower clamp, the upper clamp is provided with an upper mold cavity for embedding the upper half palm plate, and the lower clamp is provided with a lower mold cavity for embedding the lower half palm plate, and the upper clamp and the lower clamp are combined to form a molding cavity to combine and fix the upper half palm plate and the lower half palm plate.

[0012] Preferably, the clamping fixture is provided with a through opening communicating with the molding cavity, and an internal expansion component is detachably mounted on the through opening; The internal expansion component includes a mounting seat and a palm-shaped airbag body, wherein the mounting seat is used to be embedded in the through port, the palm-shaped airbag body is fixed on the mounting seat, an air cavity is arranged in the mounting seat, an air port is opened on the mounting seat, the air port is used to communicate the air cavity with the inside of the palm-shaped airbag body, and a quick-connect joint connected to the air cavity is arranged on the mounting seat; The outer surface of the palm-shaped airbag body is provided with an inner groove along its contour line, a glue injection tube is arranged in the inner groove, the glue injection tube is provided with glue injection holes at intervals, a glue injection conduit is provided on the mounting seat, one end of the glue injection conduit extends out of the mounting seat, and the other end of the glue injection conduit passes through the mounting seat to be connected with the glue injection tube.

[0013] Preferably, the inner groove is provided at the middle position of the palm-shaped airbag body.

[0014] Preferably, a clamping assembly cooperating with the clamping fixture is provided on the mounting seat.

[0015] Preferably, the clamping assembly comprises a clamping rod and a clamping seat, the clamping rod is slidably mounted on the mounting seat, and the clamping seat is provided with a clamping groove for clamping and mating with the clamping seat.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application stretches the upper palm plate and the lower palm plate, applies alloy metal glue along the palm area, positions the upper palm plate and the lower palm plate, and then heats them at high temperature. The alloy metal glue welds the upper palm plate and the lower palm plate together. Through the above-mentioned production method, the problems of cold welding, leaking welding, pinholes, sand holes, carbide particles in the weld caused by laser welding are reduced, and the problem of weld misalignment can be solved after positioning, thereby improving the production quality of the product.

[0017] 2. Through the above-mentioned manufacturing method, the present application reduces the spot welding and full welding processes in the palm production, simplifies the production process and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the process of manufacturing the palm part of a stainless steel metal hand mold.

[0019] Figure 2 It is a first structural schematic diagram of an upper palm plate and a lower palm plate.

[0020] Figure 3 2 is a second structural schematic diagram of the upper palm plate and the lower palm plate.

[0021] Figure 4 It is a schematic diagram of the application of alloy metal glue along the contour line of the palm area.

[0022] Figure 5 It is a structural diagram of the clamping fixture.

[0023] Figure 6 This is a schematic diagram of the structure of the initial palm.

[0024] Figure 7 It is a structural schematic diagram of the internal expansion component.

[0025] Figure 8 It is a schematic diagram of the installation of the palm-shaped airbag body.

[0026] Fig. 9 yes Figure 8 Enlarged schematic diagram of part A in the middle.

[0027] Explanation of the reference numerals in the accompanying drawings: 1. Upper palm plate; 2. Lower palm plate; 3. Positioning hole; 4. Clamping fixture; 41. Upper clamp; 42. Lower clamp; 5. Internal expansion component; 51. Mounting seat; 52. Palm-shaped airbag body; 53. Air cavity; 54. Air port; 55. Quick-connect connector; 56. Inner groove; 57. Glue injection tube; 58. Glue injection hole; 59. Glue injection conduit; 6. Through port; 7. Snap-on rod; 8. Snap-on seat. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-9 This application is described in further detail.

[0029] A method for making the palm of a stainless steel metal hand mold, referring to Figure 1 As shown, the following steps are included: Step S100 , stretching a metal sheet to obtain an upper palm sheet 1 and a lower palm sheet 2 , wherein the upper palm sheet 1 and the lower palm sheet 2 have a palm area.

[0030] According to the technical solution defined in step S100, specifically, the metal plate is made of stainless steel, and the metal plate is cut into a square sheet shape, and the specifications of the square sheet can be set according to actual processing requirements.

[0031] Reference Figure 2 and Figure 3 As shown, the palm area is planned in advance on the metal plate, and the palm area can be the palm area of ​​the upper palm or the palm area of ​​the lower palm, which is set according to actual needs. The upper palm plate 1 and the lower palm plate 2 can be obtained by stretching the metal plate. The upper palm plate 1 and the lower palm plate 2 have palm areas, and the upper palm plate 1 and the lower palm plate 2 are symmetrically arranged. The upper palm plate 1 and the lower palm plate 2 are combined to form a complete palm.

[0032] In this embodiment, the stretching forming is achieved by a stretching forming die, that is, the stretching forming is achieved by an upper convex die and a lower concave die. In step S100, after the metal sheet is stretched to obtain the upper palm sheet 1 and the lower palm sheet 2, the following steps are also included: Step S110 , shaping the palm regions of the upper palm plate 1 and the lower palm plate 2 , and shaping the bottom edge curvature R of the palm region to R=0 mm.

[0033] Step S120 , punching a plurality of positioning holes 3 around the palm area of ​​the upper palm plate 1 and the lower palm plate 2 , wherein the positioning holes 3 are located at the same position on the upper palm plate 1 and the lower palm plate 2 .

[0034] It is worth noting that after step S100, step S110 may be performed first and then step S120, or step S120 may be performed first and then step S110, which is not specifically limited in this embodiment.

[0035] According to the technical solution defined in steps S110 to S120, specifically, after the upper palm plate 1 and the lower palm plate 2 are stretched and formed, the bottom edge curvature R1=1mm of the palm area of ​​the upper palm plate 1, and the bottom edge curvature R1=1mm of the palm area of ​​the lower palm plate 2. After the palm areas of the upper palm plate 1 and the lower palm plate 2 are shaped, the bottom edge curvature R of the palm area is shaped to R=0mm to meet subsequent processing requirements.

[0036] After or before the shaping of the upper palm plate 1 and the lower palm plate 2 is completed, a plurality of positioning holes 3 are punched out of the upper palm plate 1 and the lower palm plate 2 around the palm area using a punching device. In this embodiment, the number of positioning holes 3 is 6, and the positions of the positioning holes 3 in the upper palm plate 1 and the lower palm plate 2 are the same. After the upper palm plate 1 and the lower palm plate 2 are matched, the relative positions of the upper palm plate 1 and the lower palm plate 2 can be positioned and fixed by inserting positioning pins in the positioning holes 3.

[0037] Step S200: Apply alloy metal glue on the upper palm plate 1 and / or the lower palm plate 2 along the contour line of the palm area.

[0038] According to the technical solution defined in step S200, specifically, refer to Figure 4 As shown, the alloy metal glue is applied to the upper palm plate 1 and / or the lower palm plate 2 by a glue dispenser. The alloy metal glue is a nickel-based brazing material for brazing stainless steel metal. The nickel-based brazing material has high strength, high temperature resistance and corrosion resistance. Since it contains high nickel and chromium components, it can adapt to chlorine washing in the production process of nitrile gloves without being corroded. In this embodiment, the alloy metal glue is in a paste form, has fluidity, wettability, and permeability, can be evenly distributed and cover the joint surface during the brazing process, thereby achieving a good brazing connection, and its good mechanical properties, high tensile strength and yield strength, can provide reliable structural support and strength.

[0039] In one embodiment, the composition of the alloy metal glue is shown in Table 1 below, and the cost is measured in parts. Table 1: The alloy metal glue is in a sticky state to better adhere to the contour lines of the palm area.

[0040] Step S300: After the upper palm plate 1 and the lower palm plate 2 are aligned and positioned, they are heated at high temperature to form a preliminary palm.

[0041] According to the technical solution defined in step S300, specifically, refer to Figure 5 and Figure 6 As shown, the upper palm plate 1 and the lower palm plate 2 are placed in a clamping fixture 4 for positioning and fixing, and the clamping fixture 4 is sent to a tunnel heating furnace for high-temperature heating. In one embodiment, the heating temperature of the tunnel heating furnace is 900-1000°C, and an inert gas is introduced into the tunnel heating furnace for protection when the clamping fixture 4 is heated at high temperature.

[0042] The clamping fixture 4 includes an upper clamp 41 and a lower clamp 42. The upper clamp 41 is provided with an upper mold cavity for embedding the upper half palm plate 1, and the lower clamp 42 is provided with a lower mold cavity for embedding the lower half palm plate 2. The upper clamp 41 and the lower clamp 42 are matched to form a molding cavity to match and fix the upper half palm plate 1 and the lower half palm plate 2. The upper clamp 41 and the lower clamp 42 can apply a certain pressure to the upper half palm plate 1 and the lower half palm plate 2, so as to ensure that the upper half palm plate 1 and the lower half palm plate 2 can be tightly pressed. Among them, an avoidance groove for the positioning pin is provided in the molding cavity.

[0043] Therefore, after the clamping fixture 4 with the upper palm plate and the lower palm plate 2 is placed in the tunnel heating furnace and heated at high temperature, the alloy metal glue melts and penetrates into the corresponding areas of the upper palm plate 1 and the lower palm plate 2, thereby bonding the upper palm plate 1 and the lower palm plate 2. As the temperature out of the tunnel heating furnace decreases, the alloy metal glue crystallizes and solidifies, and the upper palm plate 1 and the lower palm plate 2 are tightly connected together.

[0044] In the present application, when the alloy metal glue is applied to the upper palm plate 1 and / or the lower palm plate 2, after the upper palm plate 1 and the lower palm plate 2 are aligned and positioned, the alloy metal glue on the inner wall of the upper palm plate 1 and the lower palm plate 2 will not adhere well to the joint seam between the two. In order to achieve better application of the alloy metal glue to the joint seam of the inner cavity in the palm area, the present application makes the following improvement plan.

[0045] Reference Figure 7 , Figure 8 and Fig. 9 As shown, the clamping fixture 4 is provided with a through opening 6 communicating with the molding cavity, and the through opening 6 is detachably mounted with an internal expansion component 5 .

[0046] The internal expansion component 5 includes a mounting seat 51 and a palm-shaped airbag body 52. ​​The mounting seat 51 is used to be embedded in the through port 6. The through port 6 is circular and the mounting seat 51 is cylindrical. The palm-shaped airbag body 52 is fixed on the mounting seat 51. An air cavity 53 is arranged in the mounting seat 51. An air port 54 is opened on the mounting seat 51. The air port 54 is used to connect the air cavity 53 with the inside of the palm-shaped airbag body 52. ​​A quick-connect joint 55 connected to the air cavity 53 is arranged on the mounting seat 51. High-pressure gas can be injected into the air cavity 53 through the quick-connect joint 55, and then introduced into the palm-shaped airbag body 52 to drive the palm-shaped airbag body 52 to expand.

[0047] An inner groove 56 is provided on the outer surface of the palm-shaped airbag body 52 along its contour line. The inner groove 56 is provided in the middle position of the palm-shaped airbag body 52. ​​The cross-section of the inner groove 56 is semicircular. A glue injection tube 57 is arranged in the inner groove 56. The distribution direction of the glue injection tube 57 is the same as the distribution direction of the inner groove 56. Glue injection holes 58 are provided at intervals on the glue injection tube 57. One end of the glue injection tube 57 extends into the air cavity 53 of the mounting seat 51, and the other end of the glue injection tube 57 is closed. A glue injection conduit 59 is provided on the mounting seat 51. One end of the glue injection conduit 59 extends outside the mounting seat 51, and the other end of the glue injection conduit 59 passes through the mounting seat 51 to be connected with the glue injection tube 57.

[0048] Therefore, before the clamping jig 4 is sent into the tunnel heating furnace, the alloy metal glue of the joint seam in the palm area needs to be evenly applied, and the internal expansion component 5 needs to be installed on the clamping jig 4 first. First, the palm-shaped airbag body 52 is placed in the palm area, and each finger of the palm-shaped airbag body 52 corresponds to each finger of the palm area one by one. Then, the mounting seat 51 is fixed in the through opening 6.

[0049] High-pressure gas can be injected into the air cavity 53 through the quick-connect joint 55, and then passed into the palm-shaped airbag body 52 to drive the palm-shaped airbag body 52 to expand. Each finger of the palm-shaped airbag body 52 expands in the palm area, and the outer wall of the palm-shaped airbag body 52 fits on the inner wall of the palm area. At this time, the inner groove 56 is aligned with the joint seam of the upper palm plate 1 and the lower palm plate 2.

[0050] Subsequently, the alloy metal glue is injected again from the glue injection conduit 59, and the alloy metal glue will overflow from the glue injection hole 58 after passing through the glue injection conduit 59 and the glue injection tube 57 to fill the joint seam. After the alloy metal glue is positioned by the inner groove 56, after a period of static standing, the alloy metal glue is slightly solidified on the joint seam, and the air pressure in the palm-shaped airbag body 52 is released to remove the mounting seat 51 from the through port 6. At this time, the clamping fixture 4 can be sent to the tunnel heating furnace for high-temperature heating to complete the bonding of the upper half palm plate 1 and the lower half palm plate 2 to form a preliminary palm.

[0051] It is worth noting that, in order to facilitate the installation and removal of the mounting seat 51 on the through-port 6, a clamping assembly that cooperates with the clamping fixture 4 is provided on the mounting seat 51. The clamping assembly includes a clamping rod 7 and a clamping seat 8. There are two clamping rods 7. The two clamping rods 7 are symmetrically installed on the mounting seat 51. The clamping rod 7 is slidably installed on the mounting seat 51. The clamping seat 8 is provided with a clamping groove for the clamping seat 8 to be clamped and matched. The outer wall of the mounting seat 51 is fitted with the inner wall of the through-port 6. By sliding the mounting seat 51 into the through-port 6, and then moving the clamping rod 7 to insert the clamping rod 7 into the clamping groove, the mounting seat 51 is installed and fixed in the through-port 6.

[0052] Step S400, the palm of the rough blank is cut off along the contour line of the palm area to obtain the palm part.

[0053] According to the technical solution defined in step S400, specifically, the welded rough palm is cut by laser cutting equipment, and continuous cutting is performed along the contour line of the palm area to obtain the desired palm after the waste edges are removed.

[0054] Therefore, through the above-mentioned production method, the problems of cold welding, leaking welding, pinholes, sand holes, carbide particles in the weld caused by laser welding are reduced, and the problem of weld misalignment and step difference can be solved after positioning, thereby improving the production quality of the product. Through the above-mentioned production method, the present application reduces the spot welding and full welding processes in the production of the palm, simplifies the production process, and reduces the production cost.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for making a palm portion of a stainless steel metal hand mold, characterized in that: The steps include: Step S100, stretching a metal plate to obtain an upper palm plate (1) and a lower palm plate (2), wherein the upper palm plate (1) and the lower palm plate (2) have a palm area; Step S200, applying alloy metal glue along the contour line of the palm area on the upper palm plate (1) and / or the lower palm plate (2); Step S300, the upper palm plate (1) and the lower palm plate (2) are aligned and positioned, and then heated at high temperature to form a preliminary palm; Step S400, the palm of the rough blank is cut off along the contour line of the palm area to obtain the palm part.

2. The palm production method of a stainless steel metal hand mold according to claim 1, characterized in that: After step S100, the following steps are also included: Step S110, shaping the palm regions of the upper palm plate (1) and the lower palm plate (2), and shaping the curvature R of the bottom edge of the palm region to R=0 mm.

3. The palm production method of a stainless steel metal hand mold according to claim 1, characterized in that: After step S100, the following steps are also included: Step S120: punching a plurality of positioning holes (3) around the palm area of ​​the upper palm plate (1) and the lower palm plate (2); the positioning holes (3) are located at the same position on the upper palm plate (1) and the lower palm plate (2).

4. The palm production method of a stainless steel metal hand mold according to claim 1, characterized in that: In step S300, the upper palm plate (1) and the lower palm plate (2) are placed in a clamping fixture (4) for positioning and fixing, and the clamping fixture (4) is sent into a tunnel-type heating furnace for high-temperature heating.

5. The palm production method of a stainless steel metal hand mold according to claim 4, characterized in that: The heating temperature of the tunnel type heating furnace is 900-1000° C. When the tunnel type heating furnace heats the clamping fixture (4) at a high temperature, an inert gas is introduced for protection.

6. The palm production method of a stainless steel metal hand mold according to claim 4, characterized in that: The clamping fixture (4) comprises an upper clamp (41) and a lower clamp (42); the upper clamp (41) is provided with an upper mold cavity for embedding the upper half palm plate (1); the lower clamp (42) is provided with a lower mold cavity for embedding the lower half palm plate (2); the upper clamp (41) and the lower clamp (42) are matched to form a molding cavity to match and fix the upper half palm plate (1) and the lower half palm plate (2).

7. The palm production method of a stainless steel metal hand mold according to claim 6, characterized in that: The clamping fixture (4) is provided with a through opening (6) communicating with the molding cavity, and an internal expansion component (5) is detachably mounted on the through opening (6); The internal expansion component (5) comprises a mounting seat (51) and a palm-shaped airbag body (52); the mounting seat (51) is used for being embedded in the through port (6); the palm-shaped airbag body (52) is fixed on the mounting seat (51); an air cavity (53) is arranged inside the mounting seat (51); an air port (54) is opened on the mounting seat (51); the air port (54) is used for connecting the air cavity (53) with the inside of the palm-shaped airbag body (52); and a quick-connect joint (55) connected to the air cavity (53) is arranged on the mounting seat (51); The outer surface of the palm-shaped airbag body (52) is provided with an inner groove (56) along its contour line, a glue injection tube (57) is arranged in the inner groove (56), and glue injection holes (58) are provided at intervals on the glue injection tube (57). The mounting seat (51) is provided with a glue injection conduit (59), one end of the glue injection conduit (59) extends out of the mounting seat (51), and the other end of the glue injection conduit (59) passes through the mounting seat (51) to communicate with the glue injection tube (57).

8. The palm production method of a stainless steel metal hand mold according to claim 7, characterized in that: The inner groove (56) is provided at the middle position of the palm-shaped airbag body (52).

9. The palm production method of a stainless steel metal hand mold according to claim 7, characterized in that: The mounting seat (51) is provided with a clamping assembly that cooperates with the clamping fixture (4).

10. The palm production method of a stainless steel metal hand mold according to claim 9, characterized in that: The clamping assembly comprises a clamping rod (7) and a clamping seat (8); the clamping rod (7) is slidably mounted on the mounting seat (51); and the clamping seat (8) is provided with a clamping groove for clamping the clamping seat (8).

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