A method for forming a special-shaped kettle cover

Abstract

The application discloses a special-shaped kettle cover forming method, comprising the following steps: A1. taking titanium plate material and performing blanking through stamping to obtain a titanium disc; A2. performing annealing treatment on the titanium disc, wherein the annealing temperature is controlled to be 600-900 DEG C, and the heating time is 10-30 minutes; A3. performing stretching on the titanium disc after annealing by adopting a stretching die, so that a first base material is obtained, the first base material is in a cup-shaped structure, the diameter of the first base material is A, the height of the first base material is 1.5H, and H>12mm; A4. performing cutting on the bottom of the first base material, and cutting off the bottom waste, so that a second base material is obtained, and the height of the second base material is H+6mm; A5. placing the second base material on an expanding die to perform expansion, so that a third base material is obtained, and the height of the third base material is H+4mm; and A6. placing the third base material on a flat mouth die to perform flat mouthing, so that a kettle cover finished product is obtained, and the height of the kettle cover finished product is H.

Description

Technical Field

[0001] This invention relates to a method for processing cups, and more particularly to a method for forming irregularly shaped teapot lids. Background Technology

[0002] When processing teapot lids, a stretching method is typically used. However, this method is not suitable for irregularly shaped lids, such as those with a narrow opening and a wider middle. Furthermore, due to the relatively small height of the lids, the traditional water-expansion method is not well-suited for processing them. Therefore, there are inconveniences when processing teapot lids with special shapes, and improvements are needed. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies, such as the inability to effectively apply stretching or hydroforming methods when processing kettle lids into special shapes, by providing a new method for forming irregularly shaped kettle lids.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0005] A method for forming an irregularly shaped kettle lid includes the following steps:

[0006] A1. Titanium sheets are cut into titanium discs by stamping.

[0007] A2. Anneal the titanium disc, wherein the annealing temperature is controlled at 600-900℃ and the heating time is 10-30 minutes;

[0008] A3. An annealed titanium disc is stretched using a stretching die to obtain a first substrate. The first substrate has a cup-shaped structure, with a diameter of A and a height of 1.5H, where H > 12 mm.

[0009] A4. Cut the bottom of the first substrate to remove the waste material at the bottom, thereby obtaining the second substrate, the height of the second substrate being H+6mm;

[0010] A5. The second substrate is placed on the bulging mold and bulged to obtain the third substrate, the height of which is H+4mm;

[0011] A6. Take the third substrate and place it in the flat-mouth mold to flatten the mouth, so as to obtain the finished pot lid. The height of the finished pot lid is H.

[0012] The annealing step in step A2 reduces the hardness and relieves stress of the titanium disc obtained in step A1, thereby reducing the defect rate caused by cracking in subsequent processing. In step A3, the height of the first substrate is set to 1.5 times the height of the finished lid to provide sufficient allowance for subsequent processing. The bulging mold in step A5 processes the second substrate to obtain the third substrate. The flat-mouth mold in step A6 performs a flat-mouth process on the third substrate, making the edge of the finished lid smooth.

[0013] Preferably, in the above-described method for forming a non-shaped kettle lid, the stretching mold in step A3 includes an upper pressing mold and a supporting mold. The upper pressing mold is provided with an extrusion channel, and the supporting mold includes a supporting rod and a limiting platform. The supporting rod is adapted to the extrusion channel, and the limiting platform is sleeved on the supporting rod.

[0014] The diameter of the support rod is adapted to the diameter of the first substrate. When the support rod drives the titanium disc through the extrusion channel, the limiting platform limits the upper pressure die, thereby stretching the titanium disc to form a first substrate with a suitable height.

[0015] Preferably, in the above-described method for forming a shaped kettle lid, the bulging mold in step A5 includes an upper bulging mold, a lower bulging mold, and a punch. The upper bulging mold and the lower bulging mold together form a bulging cavity. One end of the punch extends into the bulging cavity, and the end of the punch extending into the bulging cavity is adapted to the diameter of the second substrate.

[0016] The expansion cavity restricts the shape of the second substrate during expansion. The upper and lower expansion molds work together to facilitate the demolding of the third substrate after molding.

[0017] Preferably, in the above-described method for forming a shaped kettle lid, an extrusion block is provided at the end of the punch that extends into the expansion cavity, and the extrusion block is made of an elastic material.

[0018] During the process of extruding the second substrate to form the third substrate, the extrusion block provides outward support on the inner side of the second substrate so that it fully fits the inner wall of the expansion cavity, so that the second substrate is subjected to uniform force and the processed third substrate has uniform thickness.

[0019] Preferably, in the above-described method for forming irregularly shaped kettle lids, the extrusion block is made of urethane rubber.

[0020] The extrusion block is made of urethane. Urethane has good elasticity and strong plasticity, which can make the outer surface of the final molded third substrate smooth and eliminate adverse effects such as wrinkles and wavy lines on the outer surface. When urethane is compressed, the outer surface rubs against the inner surface of the product and continues to be compressed. The friction force between the outer surface and the inner surface of the product has the effect of pushing the product downward, which increases the product expansion coefficient and reduces the risk of cracking during the expansion process.

[0021] As a preferred embodiment, in the above-described method for forming an irregularly shaped kettle lid, the bulging upper mold includes an upper template and a concave template, the concave template being connected to the upper template, and a first arc-shaped groove being provided on the concave template.

[0022] The upper template serves as part of the connection to the external stamping equipment and also fixes the concave template; the first arc-shaped groove on the concave template serves as part of the expansion cavity, giving the final molded lid a specific arc-shaped structure at the top.

[0023] Preferably, in the above-described method for forming a shaped kettle lid, the expanding lower mold includes a lower mold base, an increasing rod, a stripping fixing plate, and a punch tube. The punch includes a punch body, a limiting block, and a spring. The limiting block is fixed on the lower mold base. The increasing rod is disposed outside the limiting block. One end of the increasing rod is connected to the lower mold base, and the other end is connected to the stripping fixing plate. The stripping fixing plate is located above the limiting block. The punch tube is provided with a punch channel, a second arc groove, and a punch upper limit boss. The second arc groove and the first arc groove together form the expanding cavity. The punch body is provided with a disc-shaped limiting part. The upper end of the punch body moves within the punch channel. The limiting part cooperates with the punch upper limit boss. The lower end of the punch body is movably connected to the limiting block. The two ends of the spring respectively abut against the punch body and the limiting block.

[0024] The lower die holder serves as the base for the expansion die and the punch, providing fixation for the expansion die and the punch. The punch body moves within the punch tube under the action of the limiting block and the spring. The upper limit boss of the punch cooperates with the limiting part to limit the upper limit of the movement of the punch body, and the limiting block limits the lower limit of the movement of the punch body. This enables the punch body to automatically extend and retract within the punch channel, and the spring can buffer during processing to avoid product damage caused by excessive impact force, while also being able to reset the punch body.

[0025] Preferably, in the above-described method for forming a non-standard kettle lid, a guide groove is provided at the connection between the limiting block and the punch body, and the lower end of the punch body is movably connected to the guide groove.

[0026] The guide groove further limits the movement of the punch body. After the upper and lower ends of the punch body are limited by the punch channel, the movement of the punch body remains stable.

[0027] Preferably, in the above-described method for forming a shaped kettle lid, the punch further includes a stripper plate, which is annular and has a through hole that matches the size of the limiting block. The lower end of the stripper plate is connected to a machine tool push rod, and the stripper plate moves up and down along the periphery of the limiting block under the control of the machine tool push rod. The upper end of the stripper plate is provided with a protruding ring, which is located on the edge of the inner ring of the stripper plate and cooperates with the limiting part.

[0028] The stripper plate is connected to the machine tool ejector rod, which can control the height of the stripper plate, thereby controlling the lower limit of the movement of the punch body. This makes the downward movement range of the punch body adjustable and allows for more accurate height of the final formed third substrate.

[0029] Preferably, in the above-described method for forming an irregularly shaped kettle lid, the flat-mouth mold in step A6 includes a rotating frame, a rotating shaft, and a cup lid clamp. One end of the rotating shaft is coaxially connected to the rotating frame, and the other end of the rotating shaft is connected to the cup lid clamp.

[0030] The rotating frame is used to fix the rotating shaft and connect to an external machine tool. The cup lid fixture can fix the third substrate, thereby processing the third substrate. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the stretching die in this invention;

[0032] Figure 2 This is a schematic diagram of the expansion mold in this invention. Figure 1 ;

[0033] Figure 3 This is a schematic diagram of the expansion mold in this invention. Figure 2 ;

[0034] Figure 4 This is a cross-sectional view of the upper and lower bulging molds in this invention;

[0035] Figure 5 This is a cross-sectional view of the expansion mold before it begins to work in this invention;

[0036] Figure 6 This is a cross-sectional view of the expansion mold in operation according to the present invention;

[0037] Figure 7 This is a schematic diagram of the flat-mouth mold in this invention;

[0038] Figure 8 This is a schematic diagram of the structure of the first substrate in this invention;

[0039] Figure 9 This is a schematic diagram of the structure of the second substrate in this invention;

[0040] Figure 10 This is a schematic diagram of the structure of the third substrate in this invention;

[0041] Figure 11 This is a schematic diagram of the finished product of the kettle lid in this invention. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-11 The invention will be further described in detail with reference to specific embodiments, but these are not intended to limit the invention:

[0043] Example 1

[0044] A method for forming an irregularly shaped kettle lid includes the following steps:

[0045] A1. Titanium sheets are cut into titanium discs by stamping.

[0046] A2. Anneal the titanium disc, wherein the annealing temperature is controlled at 600-900℃ and the heating time is 10-30 minutes;

[0047] A3. An annealed titanium disc is stretched using a stretching die to obtain a first substrate. The first substrate has a cup-shaped structure, with a diameter of A and a height of 1.5H, where H > 12 mm.

[0048] A4. Cut the bottom of the first substrate to remove the waste material at the bottom, thereby obtaining the second substrate, the height of the second substrate being H+6mm;

[0049] A5. The second substrate is placed on the bulging mold and bulged to obtain the third substrate, the height of which is H+4mm;

[0050] A6. Take the third substrate and place it in the flat-mouth mold to flatten the mouth, so as to obtain the finished pot lid. The height of the finished pot lid is H.

[0051] Preferably, the stretching die in step A3 includes an upper pressing die 11 and a supporting die 12. The upper pressing die 11 is provided with an extrusion channel 111. The supporting die 12 includes a supporting rod 121 and a limiting platform 122. The supporting rod 121 is adapted to the extrusion channel 111, and the limiting platform 122 is sleeved on the supporting rod 121.

[0052] Preferably, the bulging mold in step A5 includes an upper bulging mold 21, a lower bulging mold 22, and a punch 23. The upper bulging mold 21 and the lower bulging mold 22 together form a bulging cavity 24. One end of the punch 23 extends into the bulging cavity 24, and the end of the punch 23 extending into the bulging cavity 24 is adapted to the diameter of the second substrate.

[0053] Preferably, the end of the punch 23 that extends into the expansion cavity 24 is provided with a pressing block 231, which is made of an elastic material.

[0054] Preferably, the extrusion block 231 is made of urethane rubber.

[0055] Preferably, the expansion mold 21 includes an upper template 211 and a concave template 212, the concave template 212 being connected to the upper template 211, and a first arc-shaped groove 213 being provided on the concave template 212.

[0056] Preferably, the expansion die 22 includes a lower die base 221, an extension rod 222, a stripper fixing plate 223, and a punch tube position 224. The punch 23 includes a punch body 232, a limiting block 233, and a spring 234. The limiting block 233 is fixed on the lower die base 221. The extension rod 222 is disposed outside the limiting block 233. One end of the extension rod 222 is connected to the lower die base 221, and the other end is connected to the stripper fixing plate 223. The stripper fixing plate 223 is located above the limiting block 233. The punch tube position 224 is provided with... The die has a punch channel 225, a second arc groove 226, and a punch upper limit boss 227. The second arc groove 226 and the first arc groove 213 together form the expansion cavity 24. The punch body 232 is provided with a disc-shaped limiting part 238. The upper end of the punch body 232 moves within the punch channel 225. The limiting part 238 cooperates with the punch upper limit boss 227. The lower end of the punch body 232 is movably connected to the limiting block 233. The two ends of the spring 234 abut against the punch body 232 and the limiting block 233, respectively.

[0057] Preferably, a guide groove 235 is provided at the connection between the limiting block 233 and the punch body 232, and the lower end of the punch body 232 is movably connected to the guide groove 235.

[0058] Preferably, the punch 23 further includes a stripper plate 236, which is annular and has a through hole that matches the size of the limiting block 233. The lower end of the stripper plate 236 is connected to a machine tool push rod, and the stripper plate 236 moves up and down along the periphery of the limiting block 233 under the control of the machine tool push rod. The upper end of the stripper plate 236 is provided with a protruding ring 237, which is located on the edge of the inner ring of the stripper plate 236 and cooperates with the limiting part 238.

[0059] Preferably, the flat mold in step A6 includes a rotating frame 31, a rotating shaft 32, and a cup lid clamp 33. One end of the rotating shaft 32 is coaxially connected to the rotating frame 31, and the other end of the rotating shaft 32 is connected to the cup lid clamp 33.

[0060] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be included within the scope of the present invention.

Claims

1. A method for forming an irregularly shaped kettle lid, characterized in that, Includes the following steps: A1. Titanium sheets are cut into titanium discs by stamping. A2. Anneal the titanium disc, wherein the annealing temperature is controlled at 600-900℃ and the heating time is 10-30 minutes; A3. An annealed titanium disc is stretched using a stretching die to obtain a first substrate. The first substrate has a cup-shaped structure, with a diameter of A and a height of 1.5H, where H > 12 mm. A4. Cut the bottom of the first substrate to remove the waste material at the bottom, thereby obtaining the second substrate, the height of the second substrate being H+6mm; A5. The second substrate is placed on the bulging mold and bulged to obtain the third substrate, the height of which is H+4mm; A6. Take the third substrate and place it in the flat-mouth mold to flatten the mouth, so as to obtain the finished pot lid. The height of the finished pot lid is H.

2. The method for forming an irregularly shaped kettle lid according to claim 1, characterized in that: The stretching die mentioned in step A3 includes an upper pressing die (11) and a supporting die (12). The upper pressing die (11) is provided with an extrusion channel (111). The supporting die (12) includes a supporting rod (121) and a limiting platform (122). The supporting rod (121) is adapted to the extrusion channel (111), and the limiting platform (122) is sleeved on the supporting rod (121).

3. The method for forming an irregularly shaped kettle lid according to claim 1, characterized in that: The bulging mold mentioned in step A5 includes an upper bulging mold (21), a lower bulging mold (22), and a punch (23). The upper bulging mold (21) and the lower bulging mold (22) together form a bulging cavity (24). One end of the punch (23) extends into the bulging cavity (24), and the end of the punch (23) extending into the bulging cavity (24) is adapted to the diameter of the second substrate.

4. The method for forming an irregularly shaped kettle lid according to claim 3, characterized in that: The end of the punch (23) that extends into the expansion cavity (24) is provided with an extrusion block (231), which is made of elastic material.

5. The method for forming an irregularly shaped kettle lid according to claim 4, characterized in that: The extrusion block (231) is made of urethane rubber.

6. The method for forming an irregularly shaped kettle lid according to claim 3, characterized in that: The expansion mold (21) includes an upper template (211) and a concave template (212). The concave template (212) is connected to the upper template (211), and a first arc groove (213) is provided on the concave template (212).

7. The method for forming an irregularly shaped kettle lid according to claim 6, characterized in that: The expansion die (22) includes a lower die base (221), an extension rod (222), a stripper fixing plate (223), and a punch tube (224). The punch (23) includes a punch body (232), a limiting block (233), and a spring (234). The limiting block (233) is fixed on the lower die base (221). The extension rod (222) is located outside the limiting block (233). One end of the extension rod (222) is connected to the lower die base (221), and the other end is connected to the stripper fixing plate (223). The stripper fixing plate (223) is located above the limiting block (233). The punch tube (224) is provided with... The die has a punch channel (225), a second arc groove (226), and a punch upper limit boss (227). The second arc groove (226) and the first arc groove (213) together form the expansion cavity (24). The punch body (232) is provided with a disc-shaped limiting part (238). The upper end of the punch body (232) moves in the punch channel (225). The limiting part (238) cooperates with the punch upper limit boss (227). The lower end of the punch body (232) is movably connected to the limiting block (233). The two ends of the spring (234) abut against the punch body (232) and the limiting block (233) respectively.

8. The method for forming an irregularly shaped kettle lid according to claim 7, characterized in that: A guide groove (235) is provided at the connection between the limiting block (233) and the punch body (232), and the lower end of the punch body (232) is movably connected to the guide groove (235).

9. A method for forming an irregularly shaped kettle lid according to claim 7, characterized in that: The punch (23) also includes a stripper plate (236), which is annular. The stripper plate (236) has a through hole that matches the size of the limiting block (233). The lower end of the stripper plate (236) is connected to a machine tool push rod. The stripper plate (236) is controlled by the machine tool push rod to move up and down along the periphery of the limiting block (233). The upper end of the stripper plate (236) is provided with a protruding ring (237), which is located on the edge of the inner ring of the stripper plate (236) and cooperates with the limiting part (238).

10. A method for forming an irregularly shaped kettle lid according to claim 1, characterized in that: The flat mold mentioned in step A6 includes a rotating frame (31), a rotating shaft (32), and a cup lid clamp (33). One end of the rotating shaft (32) is coaxially connected to the rotating frame (31), and the other end of the rotating shaft (32) is connected to the cup lid clamp (33).

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