Stainless steel pipe surface texture forming control method

Abstract

The invention relates to a surface texture forming control method for a stainless steel pipe fitting. The surface texture forming control method comprises the following steps that S100, the stainless steel pipe fitting to be machined is prepared; s200, the end of the stainless steel pipe fitting is subjected to flanging treatment, so that a flange edge is formed at the end of the stainless steel pipe fitting; s300, the stainless steel pipe fitting is hung in a lower mold cavity of the lower mold through the flange edge, and the lower mold cavity is internally provided with a convex texture surface; and S400, the upper mold and the lower mold are closed, and the upper mold conducts pipe expanding action on the stainless steel pipe so that a concave texture surface can be formed on the surface of the stainless steel pipe. The concave texture surface is formed at a time, the production efficiency is high, the situation of different depths and sizes is not prone to occurring, and the product production quality is high.

Description

Technical Field

[0001] The present application relates to the technical field of surface forming, and in particular to a method for controlling the surface texture forming of a stainless steel pipe. Background Art

[0002] At present, the models used for infiltration production are made of glass blowing, such as the models for producing condoms, but the glass material has poor thermal conductivity, slow heating and cooling processes, and the models are brittle and fragile. These characteristics are increasingly inconsistent with the development needs of enterprises. Therefore, condom models made of stainless steel metal materials came into being. The condom model is divided into a cylindrical main body and a cap body located at the upper end of the main body. The main body is processed by stainless steel pipe fittings.

[0003] Regarding the above-mentioned related technologies, currently, the concave texture on the main body of the condom model is usually processed by single-point grinding. However, there are hundreds of concave textures on the main body, and it usually takes 1-3 hours to manufacture. The production efficiency is low, and it is easy to have different depths and sizes, and the quality is not high. Therefore, there is room for improvement. Summary of the invention

[0004] In order to improve production efficiency, the present application provides a method for controlling surface texture forming of a stainless steel pipe fitting.

[0005] The present application provides a stainless steel pipe surface texture forming control method using the following technical solutions: A method for controlling the surface texture forming of a stainless steel pipe fitting comprises the following steps: Step S100, preparing the stainless steel pipe to be processed; Step S200, flanging the end of the stainless steel pipe fitting to form a flange edge at the end of the stainless steel pipe fitting; Step S300, the stainless steel pipe is suspended in the lower mold cavity of the lower mold through the flange edge, wherein the lower mold cavity has a convex texture surface; In step S400, the upper mold is molded together with the upper mold, and the upper mold performs a tube expansion action on the stainless steel pipe fitting to form a concave texture surface on the surface of the stainless steel pipe fitting.

[0006] Preferably, in step S300, when the stainless steel pipe is suspended in the lower mold cavity of the lower mold by the flange edge, a gap of 0.1 mm is maintained between the outer diameter surface of the stainless steel pipe and the highest point of the convex texture surface in the lower mold cavity.

[0007] Preferably, the upper mold comprises an upper mold base, an upper mold pad and an upper mold fixing plate which are arranged in sequence, an upper mold core is fixedly arranged on the upper mold fixing plate, and the upper mold core is arranged in a vertical direction.

[0008] Preferably, the outer radius of the upper model core is designed based on the following formula: π(1 / 2φD-R4)2=πt2, wherein φD is the outer diameter of the stainless steel pipe after expansion, R4 is the outer radius of the upper model core, and t is the thickness of the stainless steel pipe.

[0009] Preferably, the lower mold includes a lower mold base, a lower mold plate arranged on the lower mold base, and an outer mold base arranged on the lower mold plate. A plurality of outer mold sliders are arranged in the outer mold base for inclined sliding movement. The plurality of outer mold sliders are arranged along the circumferential direction. The plurality of outer mold sliders are rounded to form the lower model cavity inside. The inner wall surface of the outer mold slider is a convex texture surface. The lower mold plate is provided with a clamping mechanism for clamping the flange edge of the stainless steel pipe fitting.

[0010] Preferably, a first inclined surface is arranged on the outer wall of the outer mold slider, and a second inclined surface cooperating with the first inclined surface is arranged on the outer mold base.

[0011] Preferably, the clamping mechanism comprises a pressing plate and a cover plate arranged on the pressing plate, a first through hole is arranged at the center of the pressing plate, and a second through hole is arranged at the center of the cover plate; The pressure plate is provided with a plurality of clamping sliders which are obliquely and slidably mounted in the first through opening thereof, and the plurality of clamping sliders are arranged along the circumferential direction of the first through opening, and a mounting groove is vertically penetrated in the clamping slider, and a spring pin is horizontally and slidably mounted in the mounting groove, and one end of the spring pin abuts against the lower surface of the cover plate, and the other end of the spring pin abuts against the upper surface of the outer mold slider; The lower template is provided with a driving cylinder for driving the pressing plate to move up and down.

[0012] Preferably, a first clamping slope is provided on the clamping slider, a second clamping slope cooperating with the first clamping slope is provided on the pressure plate, a clamping dovetail slider is provided on the second clamping slope, and a clamping dovetail groove cooperating with the clamping dovetail slider is provided on the first clamping slope.

[0013] Preferably, the lower template is provided with a clearance groove at a position opposite to the lower mold cavity.

[0014] Preferably, the lower mold base is provided with an ejection mechanism for ejecting the outer mold slider, the ejection mechanism includes a support plate provided below the lower mold base, a push plate provided on the support plate, and a plurality of ejector rods provided on the push plate, the number of the ejector rods is the same as the number of the outer mold sliders, the position of each ejector rod corresponds one by one to the position of each outer mold slider, and the ejector rod passes through the lower mold base and the lower mold plate and contacts the bottom end of the outer mold slider.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: In the present application, the stainless steel pipe fitting is suspended in the lower mold cavity of the lower mold by the flange edge, the upper mold is molded with the lower mold, and the upper mold expands the stainless steel pipe fitting to form a concave texture surface on the surface of the stainless steel pipe fitting. The concave texture surface is formed in one time, with high production efficiency, and is not prone to uneven depth and size, and the product production quality is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a flow chart of the surface texture forming control method of stainless steel pipe fittings.

[0017] Figure 2 It is a schematic diagram of the assembly of the upper mold and the lower mold.

[0018] Figure 3 It is a structural schematic diagram of the upper mold.

[0019] Figure 4 It is a top view of the lower mold.

[0020] Figure 5 It is a first structural schematic diagram of the lower mold.

[0021] Figure 6 Schematic diagram of the second structure of the lower mold.

[0022] Figure 7 It is a structural diagram of the clamping mechanism.

[0023] Figure 8a It is a schematic diagram of the gap between the stainless steel pipe and the lower model cavity.

[0024] Figure 8b It is a schematic diagram of the concave texture surface of stainless steel pipe fittings.

[0025] Fig. 9 It is a schematic diagram of the state of the upper model core expansion tube.

[0026] Fig.10 It is a schematic diagram of the forming of stainless steel pipe fittings.

[0027] Explanation of the reference numerals: 1. stainless steel pipe fitting; 101. flange edge; 2. upper mold; 21. upper mold base; 22. upper mold pad; 23. upper mold fixing plate; 24. upper model core; 3. lower mold; 31. lower mold base; 32. lower mold plate; 33. outer mold base; 34. outer mold slider; 35. first inclined surface; 36. second inclined surface; 37. lower model cavity; 38. clamping mechanism; 381. pressing plate; 382. cover plate; 383. first through port; 384. second through port; 385. clamping slider; 386. first clamping inclined surface; 387. second clamping inclined surface; 388. mounting groove; 389. spring pin; 390. driving cylinder; 39. convex texture surface; 40. ejection mechanism; 401. bearing plate; 402. push plate; 403. ejector rod; 41. clearance groove. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-10 This application is described in further detail.

[0029] A method for controlling the forming of surface texture of a stainless steel pipe fitting is disclosed. The invention realizes the forming of concave texture on the upper surface of a stainless steel pipe fitting 1 by expanding the stainless steel pipe fitting 1. The production efficiency is high and the concave texture is not easily uneven in depth and size.

[0030] Specifically, refer to Figure 1 and Figure 2 As shown, the surface texture forming control method of stainless steel pipe fittings includes the following steps: Step S100, preparing the stainless steel pipe 1 to be processed.

[0031] Step S200 , flanging the end of the stainless steel pipe 1 to form a flange 101 at the end of the stainless steel pipe 1 .

[0032] In step S300 , the stainless steel pipe 1 is suspended in the lower mold cavity 37 of the lower mold 3 through the flange edge 101 , wherein the lower mold cavity 37 has a convex texture surface 39 .

[0033] In step S400 , the upper mold 2 is molded together with the upper mold 2 , and the upper mold 2 performs a tube expansion action on the stainless steel pipe fitting 1 to form a concave texture surface on the surface of the stainless steel pipe fitting 1 .

[0034] According to the technical solution defined in step S100 to step S400, specifically, the stainless steel pipe fitting 1 is processed from a stainless steel pipe, and the stainless steel pipe to be processed is obtained by cutting the stainless steel pipe according to predetermined specifications and sizes.

[0035] In step S200, the end of the stainless steel pipe 1 is firstly flanging-processed, so as to form a flange 101 at the end of the stainless steel pipe 1, and the flange 101 is at a right angle to the stainless steel pipe 1. Figure 8b As shown, the stainless steel pipe fitting 1 is suspended in the lower mold cavity 37 of the lower mold 3 by the flange edge 101. Therefore, when the upper mold 2 expands the stainless steel pipe fitting 1, the flange edge 101 will bear the downward pulling force of the upper mold 2 on the stainless steel pipe fitting 1, and the flange edge 101 of the stainless steel pipe fitting 1 is used as the bearing end.

[0036] Reference Fig. 9 and Fig.10 As shown, when the upper mold 2 expands the stainless steel pipe 1, the surface of the stainless steel pipe 1 forms a concave texture surface under the action of the convex texture surface 39 and the upper mold 2. The concave texture surface is arranged at the middle and lower part of the stainless steel pipe 1. Therefore, according to the principle that the volume of the stainless steel pipe 1 before and after expansion remains unchanged, the upper flange edge 101 of the stainless steel pipe 1 is used as the bearing end, which is conducive to the flow of the unformed part material at the upper part of the stainless steel pipe 1 to the formed part material at the middle and lower part.

[0037] The structures of the upper mold 2 and the lower mold 3 are described in detail below.

[0038] Reference Figure 2 and Figure 3 As shown, the upper mold 2 includes an upper mold base 21, an upper mold pad 22 and an upper mold fixing plate 23 which are arranged in sequence. The upper mold pad 22 is fixed on the upper mold base 21, and the upper mold fixing plate 23 is fixed on the upper mold pad 22. An upper model core 24 is fixed on the upper mold fixing plate 23. The upper model core 24 is arranged in the vertical direction, and the upper model core 24 has a cylindrical structure. The outer wall surface of the upper model core 24 is a smooth and flat surface.

[0039] The outer radius of the upper mold core 24 is designed based on the following formula: π(1 / 2φD-R4)2=πt2, where φD is the outer diameter of the stainless steel pipe 1 after expansion, R4 is the outer radius of the upper mold core 24, and t is the thickness of the stainless steel pipe 1. It is worth noting that the outer diameter of the stainless steel pipe 1 after expansion is the inner diameter of the lower mold cavity 37.

[0040] The outer diameter of the upper mold core 24 is larger than the outer diameter of the stainless steel pipe fitting 1. The upper mold core 24 moves downward to expand the stainless steel pipe fitting 1 as a whole. Under the action of the upper mold core 24, the stainless steel pipe fitting 1 is plastically deformed. At the same time, the outer wall of the stainless steel pipe fitting 1 receives the reaction force of the lower mold cavity 37 of the lower mold 3. Under the action of the upper mold core 24 and the lower mold cavity 37, the convex texture surface 39 in the lower mold cavity 37 forms a concave texture surface on the stainless steel pipe fitting 1. At the same time, the overall straightness, roundness and outer diameter of the stainless steel pipe fitting 1 are maintained to meet the specified requirements.

[0041] Reference Figure 4 , Figure 5 and Figure 6 As shown, the lower mold 3 includes a lower mold base 31, a lower mold plate 32 arranged on the lower mold base 31, and an outer mold base 33 arranged on the lower mold plate 32. An installation cavity is arranged in the outer mold base 33. A plurality of outer mold sliders 34 are arranged in an inclined and sliding manner in the installation cavity of the outer mold base 33. The plurality of outer mold sliders 34 are arranged along the circumferential direction.

[0042] In one embodiment, there are four outer mold sliders 34, a first inclined surface 35 is provided on the outer wall of the outer mold slider 34, and a second inclined surface 36 matching the first inclined surface 35 is provided on the outer mold base 33. A dovetail slider is provided on the first inclined surface 35, and a dovetail groove matching the dovetail slider is provided on the second inclined surface 36.

[0043] A plurality of outer mold sliders 34 are put together to form a lower mold cavity 37 inside. The lower mold cavity 37 is cylindrical. The inner wall surface of the outer mold slider 34 is a convex texture surface 39. After a plurality of outer mold sliders 34 are put together to form a circle, the convex texture surface 39 is the inner wall surface of the lower mold cavity 37.

[0044] The above-mentioned outer mold slider 34 slides obliquely in the vertical direction. When the outer mold slider 34 slides obliquely upward, the lower mold cavity 37 can be opened. When the outer mold slider 34 slides obliquely downward, the four outer mold sliders 34 gather together, and the end faces of the four outer mold sliders 34 are rounded to form a lower mold cavity 37 inside the four outer mold sliders 34.

[0045] Therefore, when the ends of the four outer mold sliders 34 are aligned and rounded, the stainless steel pipe 1 will be placed in the lower mold cavity 37. Since there is a 0.1 mm gap between the outer diameter surface of the stainless steel pipe 1 and the highest point of the convex texture surface 39 in the lower mold cavity 37, refer to Figure 8a As shown, there will be no obstruction when the stainless steel pipe fitting 1 is placed in the lower mold cavity 37 . It is worth noting that when the stainless steel pipe fitting 1 is placed in the lower mold cavity 37 , the stainless steel pipe fitting 1 is suspended in the lower mold cavity 37 of the lower mold 3 through the flange edge 101 .

[0046] The lower mold plate 32 is provided with a clamping mechanism 38 for clamping the flange edge 101 of the stainless steel pipe 1. When the upper mold core 24 expands the stainless steel pipe 1, the clamping mechanism 38 clamps the flange edge 101 of the stainless steel pipe 1 to position it.

[0047] Reference Figure 5 and Figure 7 As shown, the clamping mechanism 38 includes a pressing plate 381 and a cover plate 382 arranged on the pressing plate 381, a first through hole 383 is arranged at the center of the pressing plate 381, and a second through hole 384 is arranged at the center of the cover plate 382, ​​the first through hole 383 and the second through hole 384 are used for the upper model core 24 to pass through, wherein the diameter of the first through hole 383 is greater than the diameter of the second through hole 384.

[0048] The pressure plate 381 has a plurality of clamping sliders 385 installed in a slanting and sliding manner in its first through opening 383. The plurality of clamping sliders 385 are arranged along the circumferential direction of the first through opening 383. Each clamping slider 385 is arranged in an arc shape. In one embodiment, four clamping sliders 385 are provided, and the ends of the four clamping sliders 385 are matched to form a full circle.

[0049] Among them, a first clamping slope 386 is arranged on the clamping slider 385, a second clamping slope 387 cooperating with the first clamping slope 386 is arranged on the pressure plate 381, a clamping dovetail slider is arranged on the second clamping slope 387, a clamping dovetail groove cooperating with the clamping dovetail slider is arranged on the first clamping slope 386, and the inclination direction of the first clamping slope 386 and the second clamping slope 387 is inclined outward along the vertical direction.

[0050] A mounting groove 388 is vertically penetrated in the clamping slider 385, and a spring pin 389 is slidably mounted in the mounting groove 388 in the horizontal direction, that is, a sliding groove is horizontally arranged in the mounting groove 388, and a sliding block matching the sliding groove is arranged on the spring pin 389, so that the spring pin 389 can slide horizontally in the mounting groove 388. One end of the spring pin 389 abuts against the lower surface of the cover plate 382, ​​and the other end of the spring pin 389 abuts against the upper surface of the outer mold slider 34, and the spring pin 389 plays a role in supporting the clamping slider 385.

[0051] A driving cylinder 390 for driving the pressing plate 381 to move up and down is provided on the lower template 32. The cylinder body of the driving cylinder 390 is fixed on the lower template 32, and the output rod of the driving cylinder 390 is fixed on the pressing plate 381.

[0052] When the driving cylinder 390 drives the pressing plate 381 to move upward, the pressing sliders 385 will separate from each other under the action of the first pressing slope 386 and the second pressing slope 387 as the pressing plate 381 is lifted. Conversely, when the driving cylinder 390 drives the pressing plate 381 to move downward, the pressing sliders 385 will gather together under the action of the first pressing slope 386 and the second pressing slope 387 as the pressing plate 381 descends, and then press against the flange 101 of the stainless steel pipe 1.

[0053] It is worth mentioning that the lower template 32 is provided with a clearance groove 41 at a position opposite to the lower model cavity 37. When the stainless steel pipe fitting 1 is located in the lower model cavity 37 for tube expansion, the clearance groove 41 can prevent the lower end of the stainless steel pipe fitting 1 from contacting the lower template 32, thereby preventing the lower end of the stainless steel pipe fitting 1 from being compressed and deformed.

[0054] Reference Figure 2 and Figure 5As shown, an ejection mechanism 40 for ejecting the outer mold slider 34 is provided on the lower mold base 31. The ejection mechanism 40 includes a support plate 401 provided below the lower mold base 31, a push plate 402 provided on the support plate 401, and a plurality of ejector rods 403 provided on the push plate 402. The number of the ejector rods 403 is the same as the number of the outer mold sliders 34. The position of each ejector rod 403 corresponds to the position of each outer mold slider 34 one by one. The ejector rod 403 passes through the lower mold base 31 and the lower mold plate 32 and contacts the bottom end of the outer mold slider 34.

[0055] By driving the carrier plate 401 to move up and down, the push rod 403 can be driven to push the outer mold slider 34, and the push rod 403 can drive the outer mold slider 34 to slide upward and separate from each other, thereby separating the stainless steel pipe fitting 1 in the lower mold cavity 37.

[0056] In the present application, the stainless steel pipe fitting 1 is suspended in the lower model cavity 37 of the lower mold 3 by the flange edge 101, and the hydraulic press is driven to drive the upper mold 2 to move toward the lower mold 3. The upper mold 2 and the lower mold 3 are molded together, and the upper mold 2 expands the stainless steel pipe fitting 1 to form a concave texture surface on the surface of the stainless steel pipe fitting 1. The concave texture surface is formed in one time, with high production efficiency, and is not prone to uneven depth and size, and the product production quality is high.

[0057] 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 controlling the surface texture of a stainless steel pipe, characterized in that: The steps include: Step S100, preparing a stainless steel pipe to be processed (1); Step S200, flanging the end of the stainless steel pipe (1) to form a flange edge (101) at the end of the stainless steel pipe (1); Step S300, the stainless steel pipe (1) is suspended in the lower mold cavity (37) of the lower mold (3) through the flange edge (101), wherein the lower mold cavity (37) has a convex texture surface (39); Step S400, the upper mold (2) is molded together with the upper mold (2), and the upper mold (2) performs a tube expansion action on the stainless steel pipe fitting (1) to form a concave texture surface on the surface of the stainless steel pipe fitting (1).

2. A stainless steel pipe surface texture forming control method according to claim 1, characterized in that: In step S300, when the stainless steel pipe (1) is suspended in the lower mold cavity (37) of the lower mold (3) by the flange edge (101), a gap of 0.1 mm is maintained between the outer diameter surface of the stainless steel pipe (1) and the highest point of the convex texture surface (39) in the lower mold cavity (37).

3. A stainless steel pipe surface texture forming control method according to claim 1, characterized in that: The upper mold (2) comprises an upper mold base (21), an upper mold pad (22) and an upper mold fixing plate (23) which are arranged in sequence, an upper mold core (24) is fixedly arranged on the upper mold fixing plate (23), and the upper mold core (24) is arranged in a vertical direction.

4. A stainless steel pipe surface texture forming control method according to claim 3, characterized in that: The outer radius of the upper model core (24) is designed based on the following formula: π(1 / 2φD-R4)2=πt2, wherein φD is the outer diameter of the stainless steel pipe (1) after expansion, R4 is the outer radius of the upper model core (24), and t is the thickness of the stainless steel pipe (1).

5. A stainless steel pipe surface texture forming control method according to claim 1, characterized in that: The lower mold (3) comprises a lower mold base (31), a lower mold plate (32) arranged on the lower mold base (31), and an outer mold base (33) arranged on the lower mold plate (32); a plurality of outer mold sliders (34) are arranged in an inclined sliding manner in the outer mold base (33); the plurality of outer mold sliders (34) are arranged along the circumferential direction; the plurality of outer mold sliders (34) are assembled into a circle to form the lower mold cavity (37) inside; the inner wall surface of the outer mold slider (34) is a convex texture surface (39); and a clamping mechanism (38) for clamping the flange edge (101) of the stainless steel pipe fitting (1) is arranged on the lower mold plate (32).

6. A stainless steel pipe surface texture forming control method according to claim 5, characterized in that: A first inclined surface (35) is arranged on the outer wall of the outer mold slide block (34), and a second inclined surface (36) matching with the first inclined surface (35) is arranged on the outer mold base (33).

7. A method for controlling surface texture forming of a stainless steel pipe according to claim 5, characterized in that: The pressing mechanism (38) comprises a pressing plate (381) and a cover plate (382) arranged on the pressing plate (381); a first through hole (383) is arranged at the center of the pressing plate (381); and a second through hole (384) is arranged at the center of the cover plate (382); The pressure plate (381) has a plurality of clamping sliders (385) installed in a slidable manner in its first through opening (383), and the plurality of clamping sliders (385) are arranged along the circumferential direction of the first through opening (383). A mounting groove (388) passes through the clamping slider (385) in a vertical direction, and a spring pin (389) is installed in the mounting groove (388) in a slidable manner in a horizontal direction, one end of the spring pin (389) abuts against the lower surface of the cover plate (382), and the other end of the spring pin (389) abuts against the upper surface of the outer mold slider (34); a driving cylinder (390) is arranged on the lower mold plate (32) for driving the pressure plate (381) to move up and down.

8. A stainless steel pipe surface texture forming control method according to claim 7, characterized in that: The clamping slider (385) is provided with a first clamping inclined surface (386), the pressure plate (381) is provided with a second clamping inclined surface (387) cooperating with the first clamping inclined surface (386), the second clamping inclined surface (387) is provided with a clamping dovetail slider, and the first clamping inclined surface (386) is provided with a clamping dovetail groove cooperating with the clamping dovetail slider.

9. A stainless steel pipe surface texture forming control method according to claim 5, characterized in that: The lower template (32) is provided with a clearance groove (41) at a position opposite to the lower mold cavity (37).

10. A stainless steel pipe surface texture forming control method according to claim 5, characterized in that: The lower die base (31) is provided with an ejection mechanism (40) for ejecting the outer die slider (34), the ejection mechanism (40) comprising a support plate (401) provided below the lower die base (31), a push plate (402) provided on the support plate (401), and a plurality of ejector rods (403) provided on the push plate (402), the number of the ejector rods (403) being the same as the number of the outer die sliders (34), the position of each ejector rod (403) corresponding to the position of each outer die slider (34), and the ejector rod (403) passing through the lower die base (31) and the lower die plate (32) and contacting the bottom end of the outer die slider (34).

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