A face-frameless cabinet machining method

Abstract

A face frame-free shell processing method relates to the technical field of mobile terminal equipment shell processing. It comprises the following steps: S100, stamping and thickening, stamping the blank and thickening the blank during stamping to form a shell material with a U-shaped cross section; S200, deburring, using an outer rotary cutting die to remove the burrs on the top of the shell material, and forming a bearing part with an arc-shaped outer peripheral surface on the top of the shell material; S300, bearing part inclination setting, using a necking inclination die to extrude the bearing part so that the outer side surface and the inner side surface of the bearing part are both planes, and the included angle between the bearing part and the horizontal plane is an acute angle; S400, flattening, using a necking flattening die to extrude the bearing part so that the bearing part is bent, and the bent bearing part is in a horizontal state; S500, CNC processing, cutting a stepped structure for loading the screen on the bearing part to obtain a face frame-free shell. The above technical scheme has the advantages of reducing production cost, improving production efficiency and improving the final product yield.

Description

Technical Field

[0001] This invention relates to the field of mobile terminal device casing processing technology, specifically to a method for processing a frameless casing. Background Technology

[0002] Mobile terminal device casings require screen mounting. The traditional method involves first carving out a U-shaped frame from the casing material, then attaching a faceplate to both sides of the top of the U-shaped casing to mount the screen onto the mobile terminal device's surface. This method suffers from high production costs and cumbersome assembly processes. Existing frameless manufacturing methods are prone to generating burrs during processing, causing debris to fall into the mold cavity and form indentations, further reducing the casing's yield. Furthermore, frequent site transfers require repeated film application and removal, increasing the number of processes and reducing production efficiency. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a frameless shell processing method that has the advantages of reducing production costs, improving production efficiency, and increasing the final yield.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a method for processing a frameless shell, comprising the following steps:

[0005] S100, Stamping and Thickening: Stamping a blank and thickening the blank during the stamping process to form a shell with a U-shaped cross-section;

[0006] S200, Deburring: The burrs on the top of the shell material are removed using an external rotary cutting die, so that the top of the shell material forms a bearing part with an arc-shaped outer peripheral surface.

[0007] S300, The inclination angle of the bearing part is shaped by using a narrowing inclination angle mold to extrude the bearing part so that the outer and inner sides of the bearing part are both flat, and the angle between the bearing part and the horizontal plane is an acute angle;

[0008] S400, Flattening: The bearing part is pressed by a shrinking flattening mold to bend the bearing part, and the bent bearing part is in a horizontal state.

[0009] The S500 and CNC machining processes cut a stepped structure on the support part to accommodate the screen, resulting in a frameless housing.

[0010] The present invention further provides that the external rotary cutting die includes: an external rotary cutting upper die assembly and an external rotary cutting lower die assembly disposed on the lower side of the external rotary cutting upper die assembly;

[0011] The external rotary cutting upper die assembly includes: an external rotary cutting upper template; a first through groove is provided in the external rotary cutting upper template; the outer wall of the first through groove near the external rotary cutting lower die assembly is provided with a cutting edge that is circumferentially arranged and recessed in the direction away from the external rotary cutting lower die assembly; the cutting surface of the cutting edge is an arc-shaped surface;

[0012] The external rotary cutting die assembly includes:

[0013] The outer rotating cutting template has a shell material groove for placing the shell material;

[0014] A movable block is disposed on the bottom side of the externally rotating cutting template; the movable block is in contact with the externally rotating cutting template; and

[0015] A drive block assembly is disposed around the periphery of the movable block; a first protrusion is provided on one side of the movable block and the drive block assembly, and a guide rail assembly that mates with the first protrusion is provided on the other side.

[0016] The outer rotary upper cutting die assembly is driven to move downward in a vertical direction and press down the outer rotary lower cutting die assembly, wherein the outer rotary upper cutting die, the outer rotary lower cutting die, the movable block and the driving block cooperate to remove the burrs on the top of the shell material and form the bearing portion with an arc-shaped outer peripheral surface on the top of the shell material.

[0017] The present invention further provides that the driving block group includes: a first driving block, a second driving block, a third driving block, and a fourth driving block respectively located on the front side, rear side, left side, and right side of the active block;

[0018] The outer surface of the movable block is provided with four first protrusions; the four first protrusions correspond one-to-one with the first driving block, the second driving block, the third driving block and the fourth driving block respectively;

[0019] The guide rail assembly includes a first guide rail, a second guide rail, a third guide rail, and a fourth guide rail; the first guide rail, the second guide rail, the third guide rail, and the fourth guide rail are respectively disposed on the side of the first driving block, the second driving block, the third driving block, and the fourth driving block facing the first protrusion;

[0020] The first guide rail, the second guide rail, the third guide rail, and the fourth guide rail cooperate with the four first protrusions to make the movable block swing back and forth within the movable space enclosed by the first drive block, the second drive block, the third drive block, and the fourth drive block, thereby driving the outer rotating cutting template and the shell material to move toward the cutting edge or toward a direction away from the cutting edge, so that the top of the shell material forms the bearing part with an arc-shaped outer peripheral surface.

[0021] The present invention further provides that the third guide rail includes: a third recess, a third protrusion, and two third vertical plane portions that are sequentially connected downward along the height direction of the third driving block; the two third vertical plane portions are arranged vertically in sequence.

[0022] The fourth guide rail includes: a fourth protrusion, a fourth recess, and two fourth vertical plane portions that are sequentially connected downwards along the height direction of the fourth drive block; the two fourth vertical plane portions are arranged vertically in sequence.

[0023] The third concave portion corresponds to the fourth convex portion and is located on the same horizontal line; the third convex portion corresponds to the fourth concave portion and is located on the same horizontal line; the two third vertical plane portions correspond to the two fourth vertical plane portions respectively, and the corresponding third vertical plane portions and the fourth vertical plane portions are located on the same horizontal line.

[0024] The present invention further provides that the narrowing angle mold includes: a narrowing angle upper mold assembly, a narrowing angle lower mold assembly disposed on the lower side of the narrowing angle upper mold assembly, and a narrowing angle slider assembly;

[0025] The narrowing angle upper mold assembly includes: a narrowing angle upper mold plate with a second through groove inside, a narrowing angle stop plate disposed in the second through groove, and a narrowing angle sliding seat located on the lower side of the narrowing angle stop plate.

[0026] The constriction angle slider assembly is movably disposed on the periphery of the constriction angle slider seat;

[0027] The upper die of the constriction angle template facing the lower die assembly of the constriction angle is provided with a first inclined plane that is inclined upward; the constriction angle slider assembly is provided with a second inclined plane that cooperates with the first inclined plane and is inclined upward.

[0028] The angle between the first inclined plane, the second inclined plane and the horizontal plane is an acute angle;

[0029] The constricted angle lower mold assembly includes: a constricted angle lower template with a third through groove and a constricted angle lower inner stripper plate located in the third through groove; the shell material is placed on the constricted angle lower inner stripper plate, and the supporting part is exposed outside the third through groove;

[0030] The constriction angle upper mold assembly is driven to move downward in the vertical direction, wherein the constriction angle sliding seat moves downward in the vertical direction and extends into the shell material, and the constriction angle slider assembly is placed inside the shell material; the constriction angle sliding seat pushes the constriction angle slider assembly to move in the horizontal direction toward the constriction angle upper mold plate, while the constriction angle upper mold plate also moves downward in the vertical direction, so that the second inclined plane cooperates with the first inclined plane to squeeze the bearing part, thereby obtaining the bearing part whose outer and inner surfaces are both planes and the angle between them and the horizontal plane is an acute angle.

[0031] The present invention further provides that the constriction angle slider assembly includes: a first constriction angle active slider group located on the left and right sides of the constriction angle sliding seat, a second constriction angle active slider group located on the front and rear sides of the constriction angle sliding seat, and a constriction angle driven slider group located at the four corners of the constriction angle sliding seat.

[0032] One side of the reduced-angle driven slider group is mortised and tenoned with the first reduced-angle active slider group, and the other side abuts against the second reduced-angle active slider group; the mating surfaces between the reduced-angle driven slider group and the second reduced-angle active slider group are both set as inclined surfaces;

[0033] A first guide protrusion is provided on one side of the first constriction angle active slider group and a first guide groove is provided on the other side; a first guide surface and a second guide surface are respectively provided on the side of the first guide protrusion that mates with the first guide groove and the side of the first guide groove that mates with the first guide protrusion; both the first guide surface and the second guide surface are inclined surfaces and are inclined downward toward the center of the constriction angle sliding seat.

[0034] The second constriction angle active slider group and the constriction angle sliding seat are provided with a second guide protrusion on one side and a second guide groove on the other side.

[0035] A first push rod that mates with the second guide protrusion is provided between the second guide protrusion and the second guide groove; a third guide surface and a fourth guide surface are respectively provided on the side of the first push rod that mates with the second guide protrusion and the side of the second guide protrusion that mates with the first push rod.

[0036] The present invention further provides that a first baffle is provided on the top side of the template at the narrowing angle and at the edge of the third through groove; the first baffle cooperates with the narrowing angle slider assembly to fix the shell material.

[0037] The present invention further provides that the necking and flattening mold includes: a necking and flattening upper mold assembly, a necking and flattening lower mold assembly disposed on the lower side of the necking and flattening upper mold assembly, and a necking and flattening block assembly;

[0038] The constriction and flattening upper mold assembly includes: a constriction and flattening upper mold template with a fourth through groove inside, a constriction and flattening stop plate disposed in the fourth through groove, and a constriction and flattening sliding seat located below the constriction and flattening stop plate.

[0039] The constriction-mouth flattening block assembly is movably disposed on the periphery of the constriction-mouth flattening sliding seat;

[0040] The upper die of the necking and flattening mold is provided with a first horizontal working plane on the side facing the lower die of the necking and flattening mold assembly; the necking and flattening block assembly is provided with a second horizontal working plane that cooperates with the first horizontal working plane.

[0041] The constriction and flattening lower mold assembly includes: a constriction and flattening lower template with a fifth through groove and a constriction and flattening lower inner stripper plate located in the fifth through groove; the shell material is placed on the constriction and flattening lower inner stripper plate, and the supporting part is exposed outside the fifth through groove;

[0042] The upper die assembly for constricting and flattening is driven to move downward in a vertical direction, wherein the constricting and flattening sliding seat moves downward in a vertical direction and extends into the shell material, and the constricting and flattening block assembly is placed inside the shell material; the constricting and flattening sliding seat pushes the constricting and flattening block assembly to move horizontally toward the upper die for constricting and flattening, while the upper die for constricting and flattening also moves downward in a vertical direction, so that the first horizontal working plane and the second horizontal working plane cooperate to squeeze the bearing part, further causing the bearing part to bend and shape into a horizontal state.

[0043] The present invention further provides that the constriction and flattening block assembly includes: a first constriction and flattening active slider group located on the left and right sides of the constriction and flattening sliding seat, a second constriction and flattening active slider group located on the front and rear sides of the constriction and flattening sliding seat, and a constriction and flattening driven slider group located at the four corners of the constriction and flattening sliding seat.

[0044] The constricted-mouth flattening driven slider assembly has one side that is tenon-and-mortise engaged with the first constricted-mouth flattening active slider assembly, and the other side that abuts against the second constricted-mouth flattening active slider assembly; the mating surfaces between the constricted-mouth flattening driven slider assembly and the second constricted-mouth flattening active slider assembly are both set as inclined surfaces;

[0045] A third guide protrusion is provided on one side of the first constricting and flattening active slider assembly and a third guide groove is provided on the other side; a fifth guide surface and a sixth guide surface are respectively provided on the side of the third guide protrusion that mates with the third guide groove and the side of the third guide groove that mates with the third guide protrusion; both the fifth guide surface and the sixth guide surface are inclined surfaces and are inclined downward toward the center of the constricting and flattening slider.

[0046] The second constriction and flattening active slider group and the constriction and flattening sliding seat are provided with a fourth guide protrusion on one side and a fourth guide groove on the other side.

[0047] A second push rod that mates with the fourth guide protrusion is provided between the fourth guide protrusion and the fourth guide groove; a seventh guide surface and an eighth guide surface are respectively provided on the side of the second push rod that mates with the fourth guide protrusion and the side of the fourth guide protrusion that mates with the second push rod.

[0048] The present invention further provides that a second baffle is provided on the top side of the constricted and flattened lower template and at the edge of the fifth through groove; the second baffle cooperates with the constricted and flattened block assembly to fix the shell material.

[0049] The beneficial effects of this invention after adopting the above technical solution are as follows: In this invention, through a continuous and integrated process of stamping thickening, deburring, shaping the inclination angle of the bearing part, flattening, and CNC machining, a bearing part with a stepped structure for mounting the screen is directly produced on a shell material with a U-shaped cross-section, ultimately resulting in a frameless shell that can directly mount the screen. Compared with the traditional method of installing a frame on the shell material to mount the screen, this frameless shell processing method eliminates the separate processing steps of the frame, improves production efficiency, reduces the material cost of frame accessories and the labor cost of assembling the frame onto the shell material, further reducing production costs; it also avoids problems such as assembly gaps caused by separate assembly, improving the structural stability of the finished frameless shell. In step S200, this frameless shell processing method uses an external rotary cutting die to remove the burrs on the top of the shell material. The external rotary cutting method can prevent debris from falling into the die cavity and causing indentations on the surface of the shell material, thus improving the final yield. Furthermore, the stamping, thickening, deburring, beveling, and flattening processes (S100 to S400) in this frameless shell processing method are continuous mold processing steps that can be completed continuously on the production line without frequent equipment changes. Compared to existing frameless processing techniques that require repeated film application and removal due to frequent equipment changes, this frameless shell processing method not only reduces the number of steps and improves overall production efficiency, but also avoids secondary problems such as surface scratches and film residue that are prone to occur during film application and removal, further ensuring the surface processing quality of the shell and improving the final yield. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a flowchart illustrating the processing method for a frameless shell; the necking and tilting mold, and the necking and flattening mold.

[0052] Figure 2 This is a schematic diagram of the structure of this external rotary cutting die;

[0053] Figure 3 This is a schematic diagram of the structure of the hidden upper external rotary cutting die assembly of this external rotary cutting die;

[0054] Figure 4 This is a top-view structural diagram of the external rotary cutting die when it is not in operation;

[0055] Figure 5 It corresponds Figure 4 A cross-sectional view along the AA direction;

[0056] Figure 6 It corresponds Figure 5 A magnified view of point A in the diagram;

[0057] Figure 7 It corresponds Figure 4 A cross-sectional view along the BB direction in the middle;

[0058] Figure 8 This is a top-down view of the structure of the external rotary cutting die after it has finished working;

[0059] Figure 9 It corresponds Figure 8 A cross-sectional view along the CC direction;

[0060] Figure 10 It corresponds Figure 9 A magnified view of a portion of point B;

[0061] Figure 11 It corresponds Figure 8 A cross-sectional view along the DD direction;

[0062] Figure 12 This is a schematic diagram of the structure of the constriction angle mold;

[0063] Figure 13 This is a schematic diagram of the structure of the constriction angle mold from a top view.

[0064] Figure 14 It corresponds Figure 13 A cross-sectional view along the DD direction;

[0065] Figure 15 It corresponds Figure 14 A magnified view of a portion at point C;

[0066] Figure 16 It corresponds Figure 13 A cross-sectional view along the EE direction;

[0067] Figure 17 It corresponds Figure 16 A magnified view of a portion at point D;

[0068] Figure 18 This is a structural diagram of the concealed upper mold base, upper backing plate, upper clamping plate, upper template, and stop plate of the narrowing angle mold.

[0069] Figure 19 This is an exploded view of the structure of the narrowing angle slider seat and the narrowing angle slider assembly.

[0070] Figure 20 This is a schematic diagram of the structure of the necking and flattening mold;

[0071] Figure 21 It corresponds Figure 20 A cross-sectional view along the GG direction;

[0072] Figure 22 It corresponds Figure 21 A magnified view of a portion of point E;

[0073] Figure 23 It corresponds Figure 20 A cross-sectional view along the HH direction;

[0074] Figure 24 It corresponds Figure 23 A magnified view of a portion of point F;

[0075] Figure 25 This is a structural diagram of the concealed upper mold base, upper pad, upper clamping plate, upper template and stop plate of the shrinking and flattening mold.

[0076] Figure 26 This is an exploded view of the structure of the constriction plate smoothing block seat and the constriction plate smoothing block assembly.

[0077] Figure 27 This is a schematic diagram of the structure of the shell material after steps S200, S300 and S400 respectively.

[0078] Explanation of reference numerals in the attached figures:

[0079] 11. External rotary cutting upper die base; 111. Limiting groove; 12. External rotary cutting upper clamping plate; 121. First limiting through groove; 13. External rotary cutting upper template; 131. First through groove; 132. Cutting edge; 14. External rotary cutting stop plate; 141. Second limiting through groove; 15. External rotary cutting positioning rod; 21. External rotary cutting lower inner ejector; 211. Third limiting through groove; 22. External rotary cutting lower template; 221. Shell material groove; 23. Movable block; 231. First protrusion; 241. First driving block; 242. Second driving block; 243. Third driving block; 244. Fourth driving block; 251. First guide rail; 2511 2511. First vertical plane portion; 2512. First recessed portion; 2513. First convex portion; 252. Second guide rail; 2521. Second vertical plane portion; 2522. Second convex portion; 2523. Second recessed portion; 253. Third guide rail; 2531. Third recessed portion; 2532. Third convex portion; 2533. Third vertical plane portion; 254. Fourth guide rail; 2541. Fourth convex portion; 2542. Fourth recessed portion; 2543. Fourth vertical plane portion; 26. Outer rotating cutting stripper plate; 27. Outer rotating cutting clamping plate; 28. Outer rotating cutting pad; 29. ​​Outer rotating cutting mold base; 291. Elastic urethane rubber;

[0080] 31. Upper mold base for narrowing angle; 32. Upper backing plate for narrowing angle; 33. Upper clamping plate for narrowing angle; 34. Upper template for narrowing angle; 341. Second through slot; 35. Positioning post for narrowing angle; 36. Stop plate for narrowing angle; 37. Sliding seat for narrowing angle; 41. Lower inner release plate for narrowing angle; 42. Lower template for narrowing angle; 421. Third through slot; 422. First side guard; 43. Lower clamping plate for narrowing angle; 44. Lower mold base for narrowing angle; 45. Narrowing angle Tilt-angle foot; 51, First narrowing tilt angle active slider; 52, Second narrowing tilt angle active slider; 53, Narrowing tilt angle driven slider; 61, First inclined plane; 62, Second inclined plane; 63, First guide protrusion; 631, First guide surface; 64, First guide groove; 641, Second guide surface; 65, Second guide protrusion; 651, Fourth guide surface; 66, Second guide groove; 67, First push rod; 671, Third guide surface;

[0081] 71. Shrink and flatten the upper mold base; 72. Shrink and flatten the upper pad; 73. Shrink and flatten the upper clamping plate; 74. Shrink and flatten the upper template; 741. Fourth through slot; 75. Shrink and flatten the positioning post; 76. Shrink and flatten the stop plate; 77. Shrink and flatten the sliding seat; 81. Shrink and flatten the lower inner release plate; 82. Shrink and flatten the lower template; 821. Fifth through slot; 822. Second stop; 83. Shrink and flatten the lower clamping plate; 84. Shrink and flatten the lower mold base; 85. Shrink and flatten the lower pad; 91 92. First constricted flattening active slider; 93. Second constricted flattening active slider; 104. Constricted flattening driven slider; 105. First horizontal working plane; 106. Second horizontal working plane; 107. Third guide protrusion; 108. Fifth guide surface; 109. Third guide groove; 100. Sixth guide surface; 101. Fourth guide protrusion; 100. Eighth guide surface; 101. Fourth guide groove; 102. Second push rod; 103. Seventh guide surface;

[0082] 110. Shell material; 120. Supporting part. Detailed Implementation

[0083] The present invention will be further described in detail below with reference to the accompanying drawings.

[0084] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

[0085] This embodiment relates to a method for processing a frameless shell, referring to... Figure 1 as well as Figure 27 This includes the following steps:

[0086] S100, Stamping and thickening: Stamping the blank and thickening it during the stamping process to form a shell 110 with a U-shaped cross-section;

[0087] S200, Deburring: The burrs on the top of the shell material 110 are removed by using an external rotary cutting die, and the top of the shell material 110 is formed with a bearing portion 120 having an arc-shaped outer peripheral surface.

[0088] S300, the bearing part 120 is tilted and shaped. The bearing part 120 is extruded by a narrowing tilting die so that the outer and inner sides of the bearing part 120 are both flat and the angle between the bearing part 120 and the horizontal plane is acute.

[0089] S400, Flattening: The bearing part 120 is pressed by a shrinking flattening mold to make the bearing part 120 bend, and the bent bearing part 120 is in a horizontal state.

[0090] The S500 and CNC machining processes cut a stepped structure on the support part 120 to mount the screen, resulting in a frameless shell.

[0091] Specifically, through a continuous, integrated process of stamping, thickening, deburring, tilting and shaping of the support portion 120, flattening, and CNC machining, a step-like structure for mounting the screen is directly formed on the U-shaped shell material 110, resulting in a frameless shell that can directly mount the screen. Compared to the traditional method of mounting a frame on the shell material 110 to mount the screen, this frameless shell processing method eliminates the separate processing steps of the frame, improving production efficiency, reducing the material cost of frame accessories and the labor cost of assembling the frame onto the shell material 110, further reducing production costs; it also avoids problems such as assembly gaps caused by separate assembly, improving the structural stability of the finished frameless shell. In step S200, this frameless shell processing method uses an external rotary cutting die to remove the burrs on the top of the shell material 110. The external rotary cutting method can prevent debris from falling into the die cavity and causing indentations on the surface of the shell material 110, thus improving the final yield. Furthermore, the stamping, thickening, deburring, beveling, and flattening processes (S100 to S400) in this frameless shell processing method are continuous mold processing steps that can be completed continuously on the production line without frequent equipment changes. Compared to existing frameless processing techniques that require repeated film application and removal due to frequent equipment changes, this frameless shell processing method not only reduces the number of steps and improves overall production efficiency, but also avoids secondary problems such as surface scratches and film residue on the shell material 110 that are prone to occur during film application and removal, further ensuring the surface processing quality of the shell material 110 and improving the final yield.

[0092] In this embodiment, refer to Figure 1 as well as Figure 27 , Figure 27 From top to bottom, the images show the states of the shell material 110 after steps S200, S300, and S400. In step S100, a stamping press is used to stamp the cut blank, stretching and thinning it while creating thicker edges. In step S200, an external rotary cutting die forms a bearing portion 120 with an arc-shaped outer peripheral surface on the top of the shell material 110. This arc-shaped outer peripheral surface provides stress transition for subsequent extrusion, preventing cracking of the shell material 110 due to hard bending. In step S300, a tapering and angled die extrudes the inner and outer sides of the bearing portion 120 into a flat plane and forms an acute angle, ensuring uniform plastic deformation of the shell material 110 and preventing uneven wall thickness. In step S400, the bearing part 120 is bent to a horizontal state by the shrinking and flattening mold, providing a precise horizontal machining surface for subsequent CNC machining, eliminating the CNC cutting dimension deviation caused by the tilt of the machining surface, and greatly improving the machining accuracy of the subsequent stepped structure.

[0093] Furthermore, referring to Figures 2-11 The external rotary cutting die includes an external rotary cutting upper die assembly and an external rotary cutting lower die assembly disposed below the external rotary cutting upper die assembly. The external rotary cutting upper die assembly includes an external rotary cutting upper template 13; a first through groove 131 is formed in the external rotary cutting upper template 13; a cutting edge 132 is provided on the outer wall of the first through groove 131 near the external rotary cutting lower die assembly; the cutting edge 132 is arranged circumferentially and is recessed in the direction away from the external rotary cutting lower die assembly. The cutting surface of the cutting edge 132 is an arc-shaped surface; the outer rotary cutting die assembly includes: an outer rotary cutting template 22, a movable block 23, and a drive block assembly, wherein the outer rotary cutting template 22 has a shell material groove 221 for placing the shell material 110; the movable block 23 is disposed on the bottom side of the outer rotary cutting template 22; the movable block 23 is in contact with the outer rotary cutting template 22; the drive block assembly is disposed on the periphery of the movable block 23; a first protrusion 231 is provided between the movable block 23 and the drive block assembly, and a guide rail assembly that cooperates with the first protrusion 231 is provided on the other side; the outer rotary cutting upper die assembly is driven to move downward in the vertical direction and press down on the outer rotary cutting lower die assembly, wherein the outer rotary cutting upper template 13, the outer rotary cutting lower template 22, the movable block 23, and the drive block assembly cooperate to remove the burrs on the top of the shell material 110, and form the bearing portion 120 with an arc-shaped outer peripheral surface on the top of the shell material 110. In this embodiment, a first protrusion 231 is provided on the movable block 23, and a guide rail assembly that cooperates with the first protrusion 231 is provided on the drive block assembly. The cutting surface of the cutting edge 132 is an arc-shaped surface to facilitate the formation of an arc-shaped outer peripheral surface on the bearing portion 120. Specifically, under the action of the punch press, the outer rotary cutting upper die assembly moves downward in the vertical direction and presses down the outer rotary cutting lower die assembly. Since the movable block 23 and the drive block assembly are provided with a first protrusion 231 on one side and a guide rail assembly that cooperates with the first protrusion 231 on the other side, the movable block 23 swings left and right and back and forth under the cooperation of the first protrusion 231 and the guide rail assembly, thereby driving the outer rotary cutting lower die 22 on the movable block 23 to swing left and right and back and forth, thereby causing the shell material 110 located in the shell material groove 221 to move toward the cutting edge 132, thereby causing the cutting edge 132 to cut the outer peripheral surface of the bearing portion 120 from the outside to the inside, so that the outer peripheral surface of the bearing portion 120 is arc-shaped (see reference). Figure 10 During this process, the shell material 110 remains in close contact with the shell material groove 221 to prevent debris from falling into the shell material groove 221, thereby preventing the surface of the shell material 110 from being scratched by debris. In some embodiments, the drive block assembly is provided with a first protrusion 231, and the movable block 23 is provided with a guide rail assembly that cooperates with the first protrusion 231.

[0094] Furthermore, referring to Figure 3 as well as Figures 5-11The drive block assembly includes a first drive block 241, a second drive block 242, a third drive block 243, and a fourth drive block 244 located on the front, rear, left, and right sides of the movable block 23, respectively. The outer surface of the movable block 23 has four first protrusions 231; each of the four first protrusions 231 corresponds to one of the first drive blocks 241, 242, 243, and 244. The guide rail assembly includes a first guide rail 251, a second guide rail 252, a third guide rail 253, and a fourth guide rail 254; these guide rails are respectively located on the side of the first drive block 241, 242, 243, and 244 facing the first protrusions 231. The first guide rail 251, the second guide rail 252, the third guide rail 253, and the fourth guide rail 254 cooperate with the four first protrusions 231 to make the movable block 23 oscillate back and forth within the active space enclosed by the first drive block 241, the second drive block 242, the third drive block 243, and the fourth drive block 244. This drives the outer rotating cutting template 22 and the shell material 110 to move towards the cutting edge 132 or away from the cutting edge 132, so that the top of the shell material 110 forms a bearing part 120 with an arc-shaped outer peripheral surface. Specifically, the first guide rail 251, the second guide rail 252, the third guide rail 253, and the fourth guide rail 254 cooperate with the four first protrusions 231 to form a symmetrical drive guide in four directions, ensuring that the movable block 23 can oscillate back and forth, and effectively avoiding the problem of unilateral force imbalance during the oscillation of the movable block 23, thus ensuring the stability of the overall motion structure. Compared to traditional methods that require drive components (such as geared motors or servo motors) to drive the movable block 23, this external rotary cutting die eliminates the need for additional drive components such as geared motors or servo motors, simplifying the overall structure of the external rotary cutting die. This external rotary cutting die directly uses the downward pressing force of the external rotary cutting upper die assembly as the sole power source for the reciprocating swing of the movable block 23. The external rotary cutting upper die assembly presses down against the external rotary cutting lower die template 22, which in turn contacts the movable block 23. Through the sliding cooperation of the four first protrusions 231 with the corresponding first guide rail 251, second guide rail 252, third guide rail 253, and fourth guide rail 254, the downward pressing force is converted into the power to drive the movable block 23 to reciprocate, thereby causing the external rotary cutting lower die template 22 and the shell material 110 to complete their interaction with the cutting edge 132.

[0095] In this embodiment, refer to Figure 9 as well as Figure 11The first guide rail 251 includes two first vertical plane portions 2511, a first recess 2512, and a first protrusion 2513, which are sequentially connected downwards along the height direction of the first drive block 241; the two first vertical plane portions 2511 are arranged vertically. The second guide rail 252 includes two second vertical plane portions 2521, a second protrusion 2522, and a second recess 2523, which are sequentially connected downwards along the height direction of the second drive block 242; the two second vertical plane portions 2521 are arranged vertically; the first recess 2512 corresponds to the second protrusion 2522 and is located on the same horizontal line; the first protrusion 2513 corresponds to the second recess 2523 and is located on the same horizontal line; the two first vertical plane portions 2511 and the two second vertical plane portions 2521 correspond to each other, and the corresponding first vertical plane portions 2511 and second vertical plane portions 2521 are located on the same horizontal line. The third guide rail 253 includes a third recess 2531, a third protrusion 2532, and two third vertical plane portions 2533, which are sequentially connected downwards along the height direction of the third drive block 243; the two third vertical plane portions 2533 are arranged vertically. The fourth guide rail 254 includes a fourth protrusion 2541, a fourth recess 2542, and two fourth vertical plane portions 2543, which are sequentially connected downwards along the height direction of the fourth drive block 244; the two fourth vertical plane portions 2543 are arranged vertically. The third recess 2531 corresponds to the fourth protrusion 2541 and is located on the same horizontal line. The third protrusion 2532 corresponds to the fourth recess 2542 and is located on the same horizontal line. The two third vertical plane portions 2533 correspond to the two fourth vertical plane portions 2543 respectively, and the corresponding third vertical plane portions 2533 and fourth vertical plane portions 2543 are located on the same horizontal line. Specifically, the four first protrusions 231 of the movable block 23 are respectively in contact with the first guide rail 251, the second guide rail 252, the third guide rail 253, and the fourth guide rail 254; when the external rotary cutting upper die assembly is pressed down, the first protrusions 231 on the front and rear sides of the movable block 23 slide along the two first vertical plane portions 2511, the first recess 2512, and the first protrusion 2513 of the first guide rail 251, and the two second vertical plane portions 2521, the first protrusion 2513, and the first recess 2512 of the second guide rail 252, forming a back-and-forth swing. The first protrusion 231 on the left and right sides slides along the third concave portion 2531, the third protrusion 2532, and the two third vertical plane portions 2533 of the third guide rail 253, as well as the fourth protrusion 2541, the fourth concave portion 2542, and the two fourth vertical plane portions 2543 of the fourth guide rail 254, forming a left-right swing; finally, the movable block 23, with the cooperation of the guide rail group, realizes the left-right and back-forward reciprocating swing, thereby driving the outer rotating cutting template 22 and the bearing portion 120 to move toward the cutting edge 132 or toward a direction away from the cutting edge 132.The first concave portion 2512 corresponds to the second convex portion 2522, the first convex portion 2513 corresponds to the second concave portion 2523, the third concave portion 2531 corresponds to the fourth convex portion 2541, and the third convex portion 2532 corresponds to the fourth concave portion 2542, respectively, and they are coplanar. The two first vertical plane portions 2511 are aligned with the two second vertical plane portions 2521, and the two third vertical plane portions 2533 are aligned with the two fourth vertical plane portions 2543, respectively. This symmetrical alignment structure ensures that when the four first protrusions 231 of the movable block 23 cooperate with the guide rail assembly, the force is evenly distributed in four directions, avoiding the jamming and trajectory deviation caused by the unilateral load of the movable block 23 during the swing process, ensuring the smoothness of the reciprocating swing of the movable block 23, and thus ensuring that the shearing engagement posture of the bearing portion 120 of the shell material 110 and the cutting edge 132 is always accurate. In addition, the vertical plane portions and concave and convex portions arranged vertically form a continuous guide path, reducing motion resistance, avoiding jamming, and improving processing efficiency.

[0096] In this embodiment, the outer rotary cutting upper die assembly includes: an outer rotary cutting upper die base 11, an outer rotary cutting upper clamping plate 12, an outer rotary cutting stop plate 14, and a T-shaped outer rotary cutting positioning rod 15; wherein the outer rotary cutting upper die base 11, the outer rotary cutting upper clamping plate 12, and the outer rotary cutting upper die template 13 are arranged sequentially from top to bottom, and a limiting groove 111 is provided on the bottom side of the outer rotary cutting upper die base 11 to prevent the outer rotary cutting positioning rod 15 from moving out; the outer rotary cutting stop plate 14 is disposed in the first through groove 131, and a T-shaped first limiting through groove 121 is provided on the top side of the outer rotary cutting upper clamping plate 12; the outer rotary cutting stop plate 14 is provided with a second limiting through groove 141.

[0097] The external rotating cutting die assembly also includes: an external rotating inner cutting ejector 21, an external rotating cutting ejector plate 26, an external rotating cutting clamping plate 27, an external rotating cutting pad 28, an external rotating cutting die base 29, an elastic urethane rubber 291 disposed on the lower side of the external rotating cutting die base 29, and a force transmission ejector rod. An upper top plate is provided between the elastic urethane rubber 291 and the external rotating cutting die base 29, and a lower top plate is provided at the bottom of the elastic urethane rubber 291. The force transmission ejector rod (not shown in the attached drawing) passes through the external rotating cutting clamping plate 27, the external rotating cutting pad 28, and the external rotating cutting die base 29 and abuts against the external rotating cutting ejector plate 26 to ensure that the external rotating inner cutting ejector 21, the external rotating cutting ejector plate 26, the movable block 23, and the external rotating cutting template 22 descend slowly under the downward pressure of the external rotating upper cutting die assembly. The elastic urethane rubber 291 serves to reset the outer rotating cut-out inner ejector 21, the outer rotating cut-out plate 26, the movable block 23, the outer rotating cut-out template 22, and to buffer the pressure of the outer rotating cut-out upper die assembly. The outer rotating cut-out inner ejector 21 is placed in the shell material groove 221 and works with the outer rotating cut-out template 22 to clamp the shell material 110, wherein the bearing part 120 of the shell material 110 is exposed outside the second through groove 341. The outer rotating cut-out inner ejector 21 has a third limiting through groove 211. The top end of the outer rotating cut-out positioning rod 15 is placed in the limiting groove 111, and the bottom end is placed in the third limiting through groove 211. The radius of the bottom end of the outer rotating cut-out positioning rod 15 is smaller than the width of the third limiting through groove 211. The external rotary cutting positioning rod 15 ensures that the external rotary cutting inner ejector 21 moves within a certain range following the external rotary cutting template 22, while also preventing large-scale radial and circumferential offsets and movement of the external rotary cutting inner ejector 21. This ensures that the external rotary cutting inner ejector 21 and the external rotary cutting template 22 maintain a precise relative alignment, always cooperating with the external rotary cutting template 22 to form a stable clamping state for the shell material 110. The external rotary cutting template 22, external rotary cutting ejector plate 26, movable block 23, external rotary cutting clamping plate 27, external rotary cutting pad 28, and external rotary cutting mold base 29 are arranged sequentially from top to bottom; the external rotary cutting clamping plate 27 and the external rotary cutting ejector plate 26 are spaced apart; the top of the drive block group passes through the external rotary cutting ejector plate 26 and protrudes from the top side of the external rotary cutting ejector plate 26, while its bottom end is placed inside the external rotary cutting clamping plate 27.

[0098] When the external rotary cutting die is working, the shell material 110 is placed in the shell material groove 221 of the external rotary cutting template 22, and the external rotary cutting inner stripper 21 is placed inside the shell. Under the action of the punch, the external rotary cutting upper die assembly is driven to move vertically downward. The shell is always clamped between the external rotary cutting template 22 and the external rotary cutting inner stripper 21, and is in close contact with both, which prevents the chips during cutting from falling into the shell material groove 221, and further prevents the chips from scratching the surface of the shell material 110.

[0099] In this embodiment, refer to Figures 12-19The constriction angle mold includes: a constriction angle upper mold assembly, a constriction angle lower mold assembly disposed below the constriction angle upper mold assembly, and a constriction angle slider assembly; the constriction angle upper mold assembly includes: a constriction angle upper template 34, a constriction angle stop plate 36, and a constriction angle sliding seat 37, wherein the constriction angle upper template 34 has a second through groove 341, the constriction angle stop plate 36 is disposed in the second through groove 341, the constriction angle sliding seat 37 is located below the constriction angle stop plate 36, and the constriction angle slider assembly is movably disposed around the constriction angle sliding seat 37; the side of the constriction angle upper template 34 facing the constriction angle lower mold assembly has a first inclined plane 61 that is inclined upward; the constriction angle slider assembly has a second inclined plane 62 that cooperates with the first inclined plane 61 and is inclined upward; the angle between the first inclined plane 61, the second inclined plane 62 and the horizontal plane is an acute angle (refer to...). Figure 15 as well as Figure 17 This ensures that after step S300 and before step S400, both the outer and inner surfaces of the support portion 120 are flat, and the angle between them and the horizontal plane is acute. The constricted angle lower mold assembly includes: a constricted angle lower template 42 and a constricted angle lower inner ejector plate 41; the constricted angle lower template 42 has a third through groove 421; the constricted angle lower inner ejector plate 41 is located in the third through groove 421; the shell material 110 is placed on the constricted angle lower inner ejector plate 41, and the support portion 120 is exposed outside the third through groove 421. The upper die assembly for the constriction angle is driven to move downwards vertically, wherein the constriction angle sliding seat 37 moves downwards vertically and extends into the shell 110, and the constriction angle slider assembly is placed inside the shell 110; the constriction angle sliding seat 37 pushes the constriction angle slider assembly to move horizontally toward the upper die 34 for the constriction angle, while the upper die 34 for the constriction angle also moves downwards vertically, so that the second inclined plane 62 cooperates with the first inclined plane 61 to press the bearing portion 120, thereby obtaining the bearing portion 120 whose outer and inner surfaces are both planes and whose angle with the horizontal plane is an acute angle (see reference). Figure 27Specifically, under the action of the punch press, the upper die assembly for the necking angle moves downward vertically. The necking angle sliding seat 37 and the necking angle slider assembly work together to convert the vertical downward force into extrusion force on the shell material 110, resulting in better extrusion effect on the bearing part 120, simplifying the die structure and saving production costs. The first inclined plane 61 of the necking angle upper die plate 34 and the second inclined plane 62 of the necking angle slider assembly jointly extrude force on the bearing part 120, causing it to gradually deform from an arc-shaped surface on the outer periphery to a flat surface on both the inner and outer sides. The angle of the first inclined plane 61 and the second inclined plane 62 further limits the angle of the extruded bearing part 120. During this process, the bearing part 120 is subjected to uniform force, and the deformation process is smooth, effectively avoiding cracking and chipping problems caused by hard extrusion or uneven deformation of the bearing part 120. In this embodiment, the angle between the first inclined plane 61, the second inclined plane 62, and the horizontal plane is 45°, so that the angle between the supporting part and the horizontal plane is 45°, thereby avoiding deformation of the shell material 110 due to hard extrusion. In some embodiments, the angle between the first inclined plane 61, the second inclined plane 62, and the horizontal plane can also be 60°, so that the angle between the supporting part and the horizontal plane is 60°. There is no specific limitation here, as long as the angle between the first inclined plane 61, the second inclined plane 62, and the horizontal plane is an acute angle, so that the angle between the supporting part and the horizontal plane is an acute angle.

[0100] Furthermore, the constriction angle slider assembly includes: a first constriction angle active slider group, a second constriction angle active slider group, and a constriction angle driven slider group, wherein the first constriction angle active slider group is located on the left and right sides of the constriction angle sliding seat 37, the second constriction angle active slider group is located on the front and rear sides of the constriction angle sliding seat 37, and the constriction angle driven slider group is located at the four corners of the constriction angle sliding seat 37. One side of the reduced-angle driven slider assembly is tenon-and-mortise engaged with the first reduced-angle active slider assembly, and the other side abuts against the second reduced-angle active slider assembly; the mating surfaces between the reduced-angle driven slider assembly and the second reduced-angle active slider assembly are both set as inclined surfaces; a first guide protrusion 63 is provided on one side of the first reduced-angle active slider assembly and the reduced-angle sliding seat 37, and a first guide groove 64 is provided on the other side; the side of the first guide protrusion 63 that mates with the first guide groove 64 and the side of the first guide groove 64 that mates with the first guide protrusion 63 are respectively provided with a first guide surface 631 and a second guide surface 641; the first Both the first guide surface 631 and the second guide surface 641 are inclined surfaces and both slope downward toward the center of the constricted angle sliding seat 37; a second guide protrusion 65 is provided on one side of the second constricted angle active slider group and the constricted angle sliding seat 37, and a second guide groove 66 is provided on the other side; a first push rod 67 that cooperates with the second guide protrusion 65 is provided between the second guide protrusion 65 and the second guide groove 66; a third guide surface 671 and a fourth guide surface 651 are respectively provided on the side of the first push rod 67 that cooperates with the second guide protrusion 65 and the side of the second guide protrusion 65 that cooperates with the first push rod 67.

[0101] Specifically, the cooperation of the first narrowing angle active slider group, the second narrowing angle active slider group, and the narrowing angle driven slider group ensures that all circumferential positions of the bearing part 120 are subjected to uniform compressive force, avoiding local deformation or uneven wall thickness caused by uneven force. Each of the first narrowing angle active slider group, the second narrowing angle active slider group, and the narrowing angle driven slider group has a second inclined plane 62 on the side that mates with the narrowing angle upper template 34. The narrowing angle driven slider group and the first narrowing angle active slider group are tenon-and-mortise engaged. The rigid connection characteristic of the tenon-and-mortise structure eliminates the gap between the sliders, enabling the horizontal movement of the first narrowing angle active slider group to precisely and synchronously drive the movement of the narrowing angle driven slider group. The mating surfaces between the driven slider group and the active slider group of the second narrowing angle are both set as inclined surfaces. This ensures that the active slider group of the second narrowing angle also provides a horizontal thrust towards the upper template 34 of the narrowing angle during its movement, further guaranteeing the synchronicity of the movement of the driven slider group, the active slider group of the first narrowing angle, and the active slider group of the second narrowing angle. Between the driven slider group and the active slider group of the first narrowing angle, one has a protrusion, and the other has a recessed structure that mates with the protrusion. Both the first guide surface 631 and the second guide surface 641 are inclined surfaces to convert the vertical downward force of the sliding seat 37 of the narrowing angle into a horizontal compressive force on the active slider group of the first narrowing angle in the left and right directions, causing the active slider group of the first narrowing angle to move horizontally to the left and right sides of the sliding seat 37 of the narrowing angle. During the downward pressing of the constriction angle upper mold assembly in the vertical direction, the first push rod 67 moves downward synchronously and gradually enters the second guide groove 66. Through the cooperation of the third guide surface 671 and the fourth guide surface 651, the vertical force of the first push rod 67 is converted into a horizontal thrust on the second constriction angle active slider assembly, driving the second constriction angle active slider assembly to move horizontally. In this embodiment, the third guide surface 671 includes a slope, a vertical surface, a slope, and a vertical surface that are connected in sequence and smoothly transitioned; the fourth guide surface 651 includes a vertical surface, a slope, a vertical surface, and a slope that are connected in sequence and smoothly transitioned; the third guide surface 671 and the fourth guide surface 651 adopt a complementary structure with alternating and smooth transitions of slopes and vertical surfaces, realizing that the slope gradually and smoothly converts the vertical downward pressure into horizontal thrust, preventing movement jamming.

[0102] Reference Figure 18 as well as Figure 19In this embodiment, the first constriction angle active slider group is provided with a first guide protrusion 63, and the constriction angle sliding seat 37 is provided with a first guide groove 64. In some embodiments, the first constriction angle active slider group is provided with a first guide groove 64, and the constriction angle sliding seat 37 is provided with a first guide protrusion 63. In this embodiment, the second constriction angle active slider group is provided with a second guide protrusion 65, and the constriction angle sliding seat 37 is provided with a second guide groove 66; the first push rod 67 is placed in the second guide groove 66. In this embodiment, there are six second guide protrusions 65, six second guide grooves 66, and six first push rods 67. In some embodiments, the second constriction angle active slider group is provided with a second guide groove 66, and the constriction angle sliding seat 37 is provided with a second guide protrusion 65.

[0103] In this embodiment, the first active slider group for constriction angle includes two active sliders 51 for constriction angle; the two active sliders 51 for constriction angle are located on the left and right sides of the constriction angle sliding seat 37, respectively; the second active slider group for constriction angle includes two active sliders 52 for constriction angle; the two active sliders 52 for constriction angle are located on the front and rear sides of the constriction angle sliding seat 37, respectively; the driven slider group for constriction angle includes four driven sliders 53 for constriction angle; the four driven sliders 53 for constriction angle are located on the left front corner, right front corner, left rear corner, and right rear corner of the constriction angle sliding seat 37, respectively.

[0104] Furthermore, a first baffle 422 is provided on the top side of the template 42 with the narrowing angle and at the edge of the third through groove 421; the first baffle 422 cooperates with the narrowing angle slider assembly to fix the shell material 110, thereby achieving bidirectional clamping of the inner and outer sides of the shell material 110.

[0105] In this embodiment, the constriction angle upper mold assembly further includes: a constriction angle upper mold base 31, a constriction angle upper pad 32, a constriction angle upper clamping plate 33, and a constriction angle positioning post 35; the constriction angle upper mold base 31, the constriction angle upper pad 32, the constriction angle upper clamping plate 33, and the constriction angle upper template 34 are arranged sequentially from top to bottom. The top end of the constriction angle positioning post 35 is connected to the constriction angle upper clamping plate 33, and the bottom end is connected to the constriction angle sliding seat 37. This allows the constriction angle positioning post 35 to move downwards as the constriction angle upper clamping plate 33 presses down vertically, thereby causing the constriction angle positioning post 35 to move downwards, which in turn causes the constriction angle sliding seat 37 to move downwards. In this embodiment, the top end of the first push rod 67 is connected to the constriction angle upper clamping plate 33. Similarly, as it follows the constriction angle upper clamping plate 33 downwards, it gradually moves downwards and gradually enters the second guide groove 66 to cooperate with the second guide protrusion 65. The narrowing angle lower mold assembly also includes: a narrowing angle lower pad 45, a narrowing angle lower mold base 44, and a narrowing angle lower clamping plate 43 arranged sequentially from bottom to top. The narrowing angle lower clamping plate 43 is located on the lower side of the narrowing angle lower template 42 so as to form a multi-layer support structure to stably support the narrowing angle lower template 42 and disperse the downward pressure of the narrowing angle upper mold assembly.

[0106] In this embodiment, refer to Figures 20-26 The necking and flattening mold includes: a necking and flattening upper mold assembly, a necking and flattening lower mold assembly disposed below the upper mold assembly, and a necking and flattening block assembly; the necking and flattening upper mold assembly includes: a necking and flattening upper template 74, a necking and flattening stop plate 76, and a necking and flattening sliding seat 77, wherein the necking and flattening upper template 74 has a fourth through groove 741, the necking and flattening stop plate 76 is disposed in the fourth through groove 741, and the necking and flattening sliding seat 77 is located on the necking and flattening stop plate 741. 6. On the lower side, the necking and flattening block assembly is movably disposed around the necking and flattening sliding seat 77; the upper necking and flattening template 74 facing the lower necking and flattening die assembly has a first horizontal working plane 101; the necking and flattening block assembly has a second horizontal working plane 102 that cooperates with the first horizontal working plane 101; the first horizontal working plane 101 and the second horizontal working plane 102 cooperate to ensure that the bearing part 120 is bent and shaped into a horizontal state after extrusion (see reference). Figure 22 as well as Figure 24The necking and flattening lower die assembly includes: a necking and flattening lower template 82 and a necking and flattening lower inner ejector plate 81; the necking and flattening lower template 82 has a fifth through groove 821; the necking and flattening lower inner ejector plate 81 is located in the fifth through groove 821; the shell material 110 is placed on the necking and flattening lower inner ejector plate 81, and the bearing part 120 protrudes outside the fifth through groove 821. The necking and flattening upper die assembly is driven to move downward in the vertical direction, wherein the necking and flattening sliding seat 77 moves downward in the vertical direction and extends into the shell material 110, and the necking and flattening smooth block assembly is placed in the shell material 110; the necking and flattening sliding seat 77 pushes the necking and flattening smooth block assembly to move in the horizontal direction toward the necking and flattening upper template 74, while the necking and flattening upper template 74 also moves downward in the vertical direction, so that the second horizontal working plane 102 cooperates with the first horizontal working plane 101 to squeeze the bearing part 120, thereby bending and shaping the bearing part 120 into a horizontal state. Specifically, under the action of the punch press, the necking and flattening upper die assembly moves downward vertically. The necking and flattening sliding seat 77, in conjunction with the necking and flattening smooth block assembly, converts the downward vertical force into extrusion force on the shell material 110. The extrusion effect is uniform, the die structure is simplified, and production costs are saved. The first horizontal working plane 101 of the necking and flattening upper die 74 and the second horizontal working plane 102 of the necking and flattening smooth block assembly jointly extrude force on the bearing part 120, bending and shaping it from an acute angle with the horizontal plane to a horizontal state. During this process, the bearing part 120 is subjected to uniform force and the deformation transition is smooth, effectively avoiding cracking and chipping problems caused by hard extrusion or uneven deformation of the bearing part 120.

[0107] Furthermore, referring to Figures 23-26The constriction and flattening block assembly includes: a first constriction and flattening active slider group, a second constriction and flattening active slider group, and a constriction and flattening driven slider group. The first constriction and flattening active slider group is located on the left and right sides of the constriction and flattening sliding seat 77, the second constriction and flattening active slider group is located on the front and rear sides of the constriction and flattening sliding seat 77, and the constriction and flattening driven slider group is located at the four corners of the constriction and flattening sliding seat 77. The constricted-mouth flattening driven slider assembly has one side mortise and tenon joint with the first constricted-mouth flattening active slider assembly, and the other side abuts against the second constricted-mouth flattening active slider assembly; the mating surfaces between the constricted-mouth flattening driven slider assembly and the second constricted-mouth flattening active slider assembly are both set as bevels; a third guide protrusion 103 is provided on one side of the first constricted-mouth flattening active slider assembly and the constricted-mouth flattening sliding seat 77, and a third guide groove 104 is provided on the other side; the side where the third guide protrusion 103 mates with the third guide groove 104 and the side where the third guide groove 104 mates with the third guide protrusion 103 are respectively provided with a fifth guide surface 1031 and a sixth guide surface 1041; the fifth guide surface 1041... Surface 1031 and the sixth guide surface 1041 are both inclined surfaces and both tilt downward toward the center of the constricted flattening sliding seat 77; a fourth guide protrusion 105 is provided on one side of the second constricted flattening active slider group and the constricted flattening sliding seat 77, and a fourth guide groove 106 is provided on the other side; a second push rod 107 that cooperates with the fourth guide protrusion 105 is provided between the fourth guide protrusion 105 and the fourth guide groove 106; a seventh guide surface 1071 and an eighth guide surface 1051 are respectively provided on the side of the second push rod 107 that cooperates with the fourth guide protrusion 105 and the side of the fourth guide protrusion 105 that cooperates with the second push rod 107.

[0108] Specifically, the first constriction and flattening active slider group, the second constriction and flattening active slider group, and the constriction and flattening driven slider group work together to ensure that all circumferential positions of the bearing part 120 are subjected to uniform extrusion force, avoiding local deformation or uneven wall thickness caused by uneven force. Each of the first constriction and flattening active slider group, the second constriction and flattening active slider group, and the constriction and flattening driven slider group has a second horizontal working plane 102 on the side that mates with the constriction and flattening upper template 74, ensuring consistent circumferential extrusion forming datum. The constriction and flattening driven slider group and the first constriction and flattening active slider group are tenon-and-mortise engaged. The rigid connection characteristic of the tenon-and-mortise structure eliminates the gap between the sliders, enabling the horizontal movement of the first constriction and flattening active slider group to precisely and synchronously drive the horizontal movement of the constriction and flattening driven slider group. The mating surfaces of the constricted-mouth flattening driven slider group and the second constricted-mouth flattening active slider group are designed as bevels. This ensures that the horizontal movement of the second constricted-mouth flattening active slider group synchronously drives the tube constricted-mouth flattening driven slider group to work together, while also distributing the force at the contact point to prevent movement jamming and ensure that the three slider groups move synchronously and have a consistent extrusion rhythm. Between the constricted-mouth flattening driven slider group and the first constricted-mouth flattening active slider group, one has a protrusion, and the other has a recessed structure that mates with the protrusion, enhancing the precision of the slider linkage.

[0109] Both the fifth guide surface 1031 and the sixth guide surface 1041 are inclined surfaces, which facilitates the conversion of the vertical downward force of the constriction and flattening sliding block 77 into a horizontal compressive force on the first constriction and flattening active slider group in the left and right directions, causing the first constriction and flattening active slider group to move horizontally to the left and right sides of the constriction and flattening sliding block 77. During the process of the constriction and flattening upper mold assembly pressing down in the vertical direction, the second push rod 107 moves downward synchronously and gradually enters the fourth guide groove 106. Through the cooperation of the seventh guide surface 1071 and the eighth guide surface 1051, the vertical force of the second push rod 107 is converted into a horizontal thrust on the second constriction and flattening active slider group, driving the second constriction and flattening active slider group to move horizontally, realizing efficient and smooth power transmission.

[0110] In this embodiment, the first constriction-flattening active slider group is provided with a third guide protrusion 103, and the constriction-flattening sliding seat 77 is provided with a third guide groove 104. In some embodiments, the first constriction-flattening active slider group is provided with a third guide groove 104, and the constriction-flattening sliding seat 77 is provided with a third guide protrusion 103. In this embodiment, the second constriction-flattening active slider group is provided with a fourth guide protrusion 105, and the constriction-flattening sliding seat 77 is provided with a fourth guide groove 106; the second push rod 107 is placed in the fourth guide groove 106. In some embodiments, the second constriction-flattening active slider group is provided with a fourth guide groove 106, and the constriction-flattening sliding seat 77 is provided with a fourth guide protrusion 105.

[0111] In this embodiment, the first constriction and flattening active slider group includes two first constriction and flattening active sliders 91; the two first constriction and flattening active sliders 91 are respectively located on the left and right sides of the constriction and flattening sliding seat 77; the second constriction and flattening active slider group includes two second constriction and flattening active sliders 92; the two second constriction and flattening active sliders 92 are respectively located on the front and rear sides of the constriction and flattening sliding seat 77; the constriction and flattening driven slider group includes four constriction and flattening driven sliders 93; the four constriction and flattening driven sliders 93 are respectively located on the left front corner, right front corner, left rear corner, and right rear corner of the constriction and flattening sliding seat 77, adapting to the shell material 110 structure, and realizing circumferential compression of the bearing part 120 without dead angles.

[0112] Furthermore, referring to Figure 22 as well as Figure 24 A second baffle 822 is provided on the top side of the lower template 82 and at the edge of the fifth through groove 821. The second baffle 822 cooperates with the lower template block assembly to fix the shell material 110, thereby achieving bidirectional clamping of the inner and outer sides of the shell material 110, avoiding displacement and shaking of the shell material 110 during the extrusion process, and ensuring the forming accuracy of the horizontal shaping of the bearing part 120.

[0113] In this embodiment, the narrowing and flattening upper mold assembly further includes: a narrowing and flattening upper mold base 71, a narrowing and flattening upper pad 72, a narrowing and flattening upper clamping plate 73, and a narrowing and flattening positioning post 75; the narrowing and flattening upper mold base 71, the narrowing and flattening upper pad 72, the narrowing and flattening upper clamping plate 73, and the narrowing and flattening upper template 74 are arranged sequentially from top to bottom. The top end of the narrowing and flattening positioning post 75 is connected to the narrowing and flattening upper clamping plate 73, and the bottom end is connected to the narrowing and flattening sliding seat 77. This allows the narrowing and flattening positioning post 75 to move downwards as the narrowing and flattening upper clamping plate 73 presses down in the vertical direction, thereby causing the narrowing and flattening sliding seat 77 to move downwards precisely, ensuring that the movement trajectory of the narrowing and flattening sliding seat 77 is without deviation. The top of the second push rod 107 is connected to the constricted flat upper clamping plate 73. Similarly, as it follows the constricted flat upper clamping plate 73 downward, it gradually moves down and gradually enters the fourth guide groove 106 to cooperate with the fourth guide protrusion 105, so as to realize the synchronous and stable transmission of power.

[0114] Furthermore, the necking and flattening lower mold assembly also includes: a necking and flattening lower pad 85, a necking and flattening lower mold base 84, and a necking and flattening lower clamping plate 83 arranged sequentially from bottom to top. The necking and flattening lower clamping plate 83 is located on the lower side of the necking and flattening lower template 82, forming a multi-layer rigid support structure, which stably supports the necking and flattening lower template 82, while effectively dispersing the extrusion force generated by the downward pressing of the necking and flattening upper mold assembly, preventing the lower mold assembly from deforming or shifting due to excessive force, ensuring the overall structural stability of the mold, and further improving the machining accuracy of the bearing part 120.

[0115] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A bezel-less housing processing method, characterized by, Includes the following steps: S100, Stamping and Thickening: Stamping a blank and thickening the blank during the stamping process to form a shell with a U-shaped cross-section; S200, Deburring: The burrs on the top of the shell material are removed using an external rotary cutting die, so that the top of the shell material forms a bearing part with an arc-shaped outer peripheral surface. S300, The inclination angle of the bearing part is shaped by using a narrowing inclination angle mold to extrude the bearing part so that the outer and inner sides of the bearing part are both flat, and the angle between the bearing part and the horizontal plane is an acute angle; S400, Flattening: The bearing part is pressed by a shrinking flattening mold to bend the bearing part, and the bent bearing part is in a horizontal state. S500, CNC machining, cut out a stepped structure for mounting the screen on the support part to obtain a frameless shell; The external rotary cutting die includes: an external rotary cutting upper die assembly and an external rotary cutting lower die assembly disposed on the lower side of the external rotary cutting upper die assembly; The external rotary cutting upper die assembly includes: an external rotary cutting upper template; a first through groove is provided in the external rotary cutting upper template; the outer wall of the first through groove near the external rotary cutting lower die assembly is provided with a cutting edge that is circumferentially arranged and recessed in the direction away from the external rotary cutting lower die assembly; the cutting surface of the cutting edge is an arc-shaped surface; The external rotary cutting die assembly includes: The outer rotating cutting template has a shell material groove for placing the shell material; A movable block is disposed on the bottom side of the externally rotating cutting template; the movable block is in contact with the externally rotating cutting template; and A drive block assembly is disposed around the periphery of the movable block; a first protrusion is provided on one side of the movable block and the drive block assembly, and a guide rail assembly that mates with the first protrusion is provided on the other side. The outer rotary upper cutting die assembly is driven to move downward in a vertical direction and press down the outer rotary lower cutting die assembly, wherein the outer rotary upper cutting die, the outer rotary lower cutting die, the movable block and the driving block cooperate to remove the burrs on the top of the shell material and form the bearing portion with an arc-shaped outer peripheral surface on the top of the shell material.

2. The face-frame-less cabinet fabrication method of claim 1, wherein, The drive block group includes: a first drive block, a second drive block, a third drive block, and a fourth drive block located at the front, rear, left, and right sides of the movable block, respectively; The outer surface of the movable block is provided with four first protrusions; the four first protrusions correspond one-to-one with the first driving block, the second driving block, the third driving block and the fourth driving block respectively; The guide rail assembly includes a first guide rail, a second guide rail, a third guide rail, and a fourth guide rail; the first guide rail, the second guide rail, the third guide rail, and the fourth guide rail are respectively disposed on the side of the first driving block, the second driving block, the third driving block, and the fourth driving block facing the first protrusion; The first guide rail, the second guide rail, the third guide rail, and the fourth guide rail cooperate with the four first protrusions to make the movable block swing back and forth within the movable space enclosed by the first drive block, the second drive block, the third drive block, and the fourth drive block, thereby driving the outer rotating cutting template and the shell material to move toward the cutting edge or toward a direction away from the cutting edge, so that the top of the shell material forms the bearing part with an arc-shaped outer peripheral surface.

3. The face-frame-less cabinet fabrication method of claim 2, wherein, The third guide rail includes: a third recess, a third protrusion, and two third vertical plane portions that are sequentially connected downwards along the height direction of the third drive block; the two third vertical plane portions are arranged vertically in sequence. The fourth guide rail includes: a fourth protrusion, a fourth recess, and two fourth vertical plane portions that are sequentially connected downwards along the height direction of the fourth drive block; the two fourth vertical plane portions are arranged vertically in sequence. The third concave portion corresponds to the fourth convex portion and is located on the same horizontal line; the third convex portion corresponds to the fourth concave portion and is located on the same horizontal line; the two third vertical plane portions correspond to the two fourth vertical plane portions respectively, and the corresponding third vertical plane portions and the fourth vertical plane portions are located on the same horizontal line.

4. The face-frame-less cabinet fabrication method of claim 1, wherein, The narrowing angle mold includes: a narrowing angle upper mold assembly, a narrowing angle lower mold assembly disposed on the lower side of the narrowing angle upper mold assembly, and a narrowing angle slider assembly; The narrowing angle upper mold assembly includes: a narrowing angle upper mold plate with a second through groove inside, a narrowing angle stop plate disposed in the second through groove, and a narrowing angle sliding seat located on the lower side of the narrowing angle stop plate. The constriction angle slider assembly is movably disposed on the periphery of the constriction angle slider seat; The upper die of the constriction angle template facing the lower die assembly of the constriction angle is provided with a first inclined plane that is inclined upward; the constriction angle slider assembly is provided with a second inclined plane that cooperates with the first inclined plane and is inclined upward. The angle between the first inclined plane, the second inclined plane and the horizontal plane is an acute angle; The constricted angle lower mold assembly includes: a constricted angle lower template with a third through groove and a constricted angle lower inner stripper plate located in the third through groove; the shell material is placed on the constricted angle lower inner stripper plate, and the supporting part is exposed outside the third through groove; The constriction angle upper mold assembly is driven to move downward in the vertical direction, wherein the constriction angle sliding seat moves downward in the vertical direction and extends into the shell material, and the constriction angle slider assembly is placed inside the shell material; the constriction angle sliding seat pushes the constriction angle slider assembly to move in the horizontal direction toward the constriction angle upper mold plate, while the constriction angle upper mold plate also moves downward in the vertical direction, so that the second inclined plane cooperates with the first inclined plane to squeeze the bearing part, thereby obtaining the bearing part whose outer and inner surfaces are both planes and the angle between them and the horizontal plane is an acute angle.

5. The faceless housing machining method of claim 4, wherein, The constriction angle slider assembly includes: a first constriction angle active slider group located on the left and right sides of the constriction angle slider seat, a second constriction angle active slider group located on the front and rear sides of the constriction angle slider seat, and a constriction angle driven slider group located at the four corners of the constriction angle slider seat. One side of the reduced-angle driven slider group is mortised and tenoned with the first reduced-angle active slider group, and the other side abuts against the second reduced-angle active slider group; the mating surfaces between the reduced-angle driven slider group and the second reduced-angle active slider group are both set as inclined surfaces; A first guide protrusion is provided on one side of the first constriction angle active slider group and a first guide groove is provided on the other side; a first guide surface and a second guide surface are respectively provided on the side of the first guide protrusion that mates with the first guide groove and the side of the first guide groove that mates with the first guide protrusion; both the first guide surface and the second guide surface are inclined surfaces and are inclined downward toward the center of the constriction angle sliding seat. The second constriction angle active slider group and the constriction angle sliding seat are provided with a second guide protrusion on one side and a second guide groove on the other side. A first push rod that mates with the second guide protrusion is provided between the second guide protrusion and the second guide groove; a third guide surface and a fourth guide surface are respectively provided on the side of the first push rod that mates with the second guide protrusion and the side of the second guide protrusion that mates with the first push rod.

6. The method for processing a frameless shell according to claim 4, characterized in that, A first stop is provided on the top side of the template at the narrowing angle and at the edge of the third through groove; the first stop cooperates with the narrowing angle slider assembly to fix the shell material.

7. The method for processing a frameless shell according to claim 1, characterized in that, The necking and flattening mold includes: a necking and flattening upper mold assembly, a necking and flattening lower mold assembly disposed on the lower side of the necking and flattening upper mold assembly, and a necking and flattening block assembly; The constriction and flattening upper mold assembly includes: a constriction and flattening upper mold template with a fourth through groove inside, a constriction and flattening stop plate disposed in the fourth through groove, and a constriction and flattening sliding seat located below the constriction and flattening stop plate. The constriction-mouth flattening block assembly is movably disposed on the periphery of the constriction-mouth flattening sliding seat; The upper die of the necking and flattening mold is provided with a first horizontal working plane on the side facing the lower die of the necking and flattening mold assembly; the necking and flattening block assembly is provided with a second horizontal working plane that cooperates with the first horizontal working plane. The constriction and flattening lower mold assembly includes: a constriction and flattening lower template with a fifth through groove and a constriction and flattening lower inner stripper plate located in the fifth through groove; the shell material is placed on the constriction and flattening lower inner stripper plate, and the supporting part is exposed outside the fifth through groove; The upper die assembly for constricting and flattening is driven to move downward in a vertical direction, wherein the constricting and flattening sliding seat moves downward in a vertical direction and extends into the shell material, and the constricting and flattening block assembly is placed inside the shell material; the constricting and flattening sliding seat pushes the constricting and flattening block assembly to move horizontally toward the upper die for constricting and flattening, while the upper die for constricting and flattening also moves downward in a vertical direction, so that the first horizontal working plane and the second horizontal working plane cooperate to squeeze the bearing part, further causing the bearing part to bend and shape into a horizontal state.

8. The method for processing a frameless shell according to claim 7, characterized in that, The constriction and flattening block assembly includes: a first constriction and flattening active slider group located on the left and right sides of the constriction and flattening sliding seat, a second constriction and flattening active slider group located on the front and rear sides of the constriction and flattening sliding seat, and a constriction and flattening driven slider group located at the four corners of the constriction and flattening sliding seat. The constricted-mouth flattening driven slider assembly has one side that is tenon-and-mortise engaged with the first constricted-mouth flattening active slider assembly, and the other side that abuts against the second constricted-mouth flattening active slider assembly; the mating surfaces between the constricted-mouth flattening driven slider assembly and the second constricted-mouth flattening active slider assembly are both set as inclined surfaces; A third guide protrusion is provided on one side of the first constricting and flattening active slider assembly and a third guide groove is provided on the other side; a fifth guide surface and a sixth guide surface are respectively provided on the side of the third guide protrusion that mates with the third guide groove and the side of the third guide groove that mates with the third guide protrusion; both the fifth guide surface and the sixth guide surface are inclined surfaces and are inclined downward toward the center of the constricting and flattening slider. The second constriction and flattening active slider group and the constriction and flattening sliding seat are provided with a fourth guide protrusion on one side and a fourth guide groove on the other side. A second push rod that mates with the fourth guide protrusion is provided between the fourth guide protrusion and the fourth guide groove; a seventh guide surface and an eighth guide surface are respectively provided on the side of the second push rod that mates with the fourth guide protrusion and the side of the fourth guide protrusion that mates with the second push rod.

9. The method for processing a frameless shell according to claim 7, characterized in that, A second baffle is provided on the top side of the constricted and flattened template and at the edge of the fifth through groove; the second baffle cooperates with the constricted and flattened block assembly to fix the shell material.

Images