Rotary cutting die suitable for forming slender tubular workpiece

Abstract

The utility model discloses a rotary cutting die suitable for forming a slender tubular workpiece, which comprises an upper die assembly and a lower die assembly, a workpiece is placed between the upper die assembly and the lower die assembly, and a mold core is movably placed in the workpiece. According to the rotary cutting die, the movably-arranged mold core is arranged, the rotary cutting die is suitable for thin and long tubular workpieces and other workpieces which are difficult to machine through a traditional rotary cutting die, the machining problem caused by the fact that the size of a workpiece opening is small and auxiliary elements such as an equal-height screw and a reset ejector rod cannot be added is solved, the workpiece is effectively supported in the machining process, and the machining efficiency is improved. Deformation caused by shearing force is reduced, the opening size and the profile tolerance of the product after rotary cutting are guaranteed, and therefore the yield of the product is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary cutting dies, and more particularly to a rotary cutting die suitable for forming slender tubular workpieces. Background Art

[0002] During the machining of slender tubular workpieces (aspect ratio of 2.5 or greater), particularly when the product's mouth diameter is less than 20mm, space limitations prevent the mold from accommodating auxiliary components such as contour screws and reset pins. Consequently, the mold operates without effective support, impacting its precision and stability. Peeling, which shears the product sideways, generates significant lateral shear forces, leading to deformation, mouth dimensional deviations, and substandard contours.

[0003] The above shortcomings need to be improved. Summary of the Invention

[0004] In order to solve or alleviate the problem that existing rotary cutting dies easily cause product mouth size deviation and substandard contour when processing slender tubular workpieces, the utility model provides a rotary cutting die suitable for forming slender tubular workpieces.

[0005] The technical solution of this utility model is as follows:

[0006] A rotary cutting die suitable for forming a slender tubular workpiece comprises an upper die assembly and a lower die assembly. The workpiece is placed between the upper die assembly and the lower die assembly, and a core is movably placed in the workpiece.

[0007] Furthermore, the upper die assembly includes an upper die base, an upper pad is provided at the bottom of the upper die base, an upper limit block is provided at the bottom of the upper pad, and an upper die blade is provided in the middle of the upper limit block;

[0008] The lower die assembly includes a lower die base, a lower pad is provided on the top of the lower die base, a lower limit plate is provided on the top of the lower pad, a lower cover is provided on the top of the lower limit plate, and a lower die blade is provided in the middle of the lower cover and the lower limit plate.

[0009] Furthermore, a rotary cutting guide mechanism is provided on the upper mold assembly, and the rotary cutting guide mechanism includes a cam and a guide rail provided on the outside of the cam, the cam is connected to the upper mold blade, the guide rail is connected to the upper pad, and the cam moves vertically and horizontally along the guide rail.

[0010] Furthermore, a rotary cutting guide mechanism is provided on the lower mold assembly, and the rotary cutting guide mechanism includes a cam and a guide rail provided on the outside of the cam, the cam is connected to the lower mold blade, the guide rail is connected to the lower pad, and the cam moves vertically and horizontally along the guide rail.

[0011] Furthermore, the inner wall of the guide rail is provided with a first guide portion, a second guide portion, a third guide portion and a fourth guide portion in sequence from top to bottom, and the first guide portion, the second guide portion, the third guide portion and the fourth guide portion are respectively facing the four sides of the upper mold edge.

[0012] Furthermore, a first through hole is provided at the center of the lower die blade, the diameter of the first through hole is equivalent to the outer diameter of the workpiece, and the outer diameter of the upper die blade is equivalent to the inner diameter of the workpiece.

[0013] Furthermore, the cam is located below the upper die blade, and a second through hole is provided on the cam, wherein the diameter of the second through hole is larger than the outer diameter of the workpiece.

[0014] Furthermore, a blade pad is provided at the bottom of the cam, and a receiving groove for placing the workpiece is provided at the center of the blade pad, and the diameter of the receiving groove is larger than the diameter of the workpiece.

[0015] Furthermore, a wear-resistant plate is provided at the bottom of the blade pad, the blade pad is slidably connected to the wear-resistant plate, and the wear-resistant plate is slidably connected to the guide rail.

[0016] Furthermore, a third through hole is formed on the side surface of the upper limit block.

[0017] The beneficial effect of the utility model according to the above scheme is that, by setting a movable core in this embodiment, it is suitable for slender tubular workpieces and other workpiece types that are difficult to process with traditional rotary cutting molds, and solves the processing difficulties caused by the small size of the workpiece mouth and the inability to add auxiliary components such as equal height screws and reset ejector pins. The workpiece is effectively supported during the processing, reducing the deformation caused by shear force, ensuring the mouth size and contour of the product after rotary cutting, and thus ensuring the yield of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the half-section structure of the utility model in the mold opening state;

[0021] Figure 3 It is a schematic diagram of the half-section structure of the utility model in the mold closing state;

[0022] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of the utility model;

[0023] Figure 5 It is a schematic diagram of the transverse cross-sectional structure of the present utility model.

[0024] Among them, the figure marks in the figure are: 1. Upper mold assembly; 101. Upper mold base; 102. Upper pad; 103. Upper limit block; 104. Upper mold blade; 105. Third through hole; 2. Lower mold assembly; 201. Lower mold base; 202. Lower pad; 203. Lower limit plate; 204. Lower cover plate; 205. Lower mold blade; 206. First through hole; 207. Blade pad; 208. Accommodating groove; 209. Wear-resistant plate; 3. Peeling guide mechanism; 301. Cam; 302. Guide rail; 303. Second through hole; 4. Core; 5. Workpiece. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] It should be noted that when a component is referred to as being "fixed" or "set" or "connected" to another component, it may be located directly or indirectly on the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on this technical solution. The terms "first", "second", etc. are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0027] like Figures 1 to 5 As shown, a rotary cutting die suitable for forming a slender tubular workpiece described in one embodiment of the present invention includes an upper die assembly 1 and a lower die assembly 2, a workpiece 5 is placed between the upper die assembly 1 and the lower die assembly 2, and a core 4 is movably placed in the workpiece 5.

[0028] During operation, the workpiece 5 is placed on the lower die assembly 2 and preliminarily positioned by the lower die assembly 2 to ensure the stability of the workpiece 5 during the processing. The core 4 is then placed inside the workpiece 5, or the core 4 is placed inside the workpiece 5 in advance. The shape and size of the core 4 match the specific size and shape of the workpiece 5 to support the inside of the workpiece 5. When the upper die assembly 1 moves downward under the drive of a power mechanism such as a pneumatic push rod or a hydraulic push rod, it then contacts the workpiece 5 and the core 4 to further position the workpiece 5. Subsequently, the upper die assembly 1 continues to move downward and performs lateral shearing along a preset trajectory. Due to the presence of the core 4, the workpiece 5 is effectively supported during the shearing process, reducing deformation caused by shearing force. After the shearing is completed, the upper die assembly 1 moves upward under the drive of the power mechanism, returns to its initial position, removes the product and waste, and then removes the core 4 from the product to prepare for the next processing.

[0029] In this embodiment, by providing a movable core 4, it is suitable for slender tubular workpieces 5 and other types of workpieces 5 that are difficult to process with traditional rotary cutting molds. It solves the processing difficulties caused by the small size of the mouth of the workpiece 5 and the inability to add auxiliary components such as equal height screws and reset push rods. The workpiece 5 is effectively supported during the processing process, reducing the deformation caused by shear force, ensuring the mouth size and contour of the product after rotary cutting, and thus ensuring the yield of the product.

[0030] like Figures 2 to 5 As shown, in a preferred embodiment, the upper die assembly 1 includes an upper die base 101, an upper pad 102 is provided at the bottom of the upper die base 101, an upper limit block 103 is provided at the bottom of the upper pad 102, and an upper die blade 104 is provided in the middle of the upper limit block 103;

[0031] The lower die assembly 2 includes a lower die base 201, a lower pad 202 is provided on the top of the lower die base 201, a lower limit plate 203 is provided on the top of the lower pad 202, a lower cover plate 204 is provided on the top of the lower limit plate 203, and a lower die blade 205 is provided in the middle of the lower cover plate 204 and the lower limit plate 203.

[0032] The lower die assembly 2 is provided with a rotary cutting guide mechanism 3, which includes a cam 301 connected to the lower die blade 205. A guide rail 302 connected to the lower pad 202 is provided on the outer side of the cam 301. The cam 301 moves vertically and horizontally along the guide rail 302.

[0033] The inner wall of guide rail 302 is provided with a first, second, third, and fourth guide portion, arranged from top to bottom. These guide portions face the four sides of upper die blade 104 and are arranged clockwise or counterclockwise. The guide portions comprise opposing protrusions and grooves, located on two opposing inner walls of guide rail 302. These protrusions and grooves alter the horizontal motion direction of cam 301.

[0034] During operation, cam 301, guided by guide rail 302, moves in the positive direction of the X-axis via the first guide portion, driving the upper die blade 104 in the upper die assembly 1 to cooperate with the lower die blade 205 in the lower die assembly 2 to cut the first side of the workpiece 5. After cutting, it returns to its initial position. Cam 301 then moves in the positive direction of the Y-axis under the action of the second guide portion to cut the second side of the workpiece 5. Subsequently, cam 301 moves in the negative direction of the X-axis under the action of the third guide portion to cut the third side of the workpiece 5. Next, cam 301 moves in the negative direction of the Y-axis under the action of the fourth guide portion to cut the uneven fourth side of the workpiece 5, completing the initial molding of the product.

[0035] In actual application, the rotary cutting guide mechanism 3 can be set on the upper mold assembly 1. Similarly, the rotary cutting guide mechanism 3 includes a cam 301 connected to the upper mold blade 104. A guide rail 302 connected to the upper pad 102 is set on the outside of the cam 301. The cam 301 moves vertically and horizontally along the guide rail 302.

[0036] like Figure 2 and Figure 3 As shown, in a preferred embodiment, a first through hole 206 is provided at the center of the lower die blade 205 , the diameter of the first through hole 206 is equivalent to the outer diameter of the workpiece 5 , and the outer diameter of the upper die blade 104 is equivalent to the inner diameter of the workpiece 5 .

[0037] The cam 301 is located below the upper die blade 104 . A second through hole 303 is defined in the cam 301 . The diameter of the second through hole 303 is greater than the outer diameter of the workpiece 5 .

[0038] The bottom of the cam 301 is provided with a knife edge pad 207, and the center of the knife edge pad 207 is provided with a receiving groove 208 for placing the workpiece 5. The diameter of the receiving groove 208 is larger than the diameter of the workpiece 5. The first through hole 206, the second through hole 303 and the receiving groove 208 are used to place and position the workpiece 5.

[0039] Before working, the workpiece 5 passes through the first through hole 206 and the second through hole 303 in sequence and is placed in the receiving groove 208 on the blade pad 207 of the lower mold assembly 2. The receiving groove 208 is used to support the workpiece 5. A portion of the workpiece 5 passes through the first through hole 206 at the center of the lower mold blade 205. The diameter of the first through hole 206 matches the outer diameter of the workpiece 5, which enhances the positioning accuracy of the workpiece 5. When the upper mold assembly 1 descends and the upper mold blade 104 gradually approaches the workpiece 5, since the outer diameter of the upper mold blade 104 is equivalent to the inner diameter of the workpiece 5, it can penetrate into the interior of the workpiece 5. The bottom of the upper mold blade 104 and the edge of the first through hole 206 move relative to each other to shear the workpiece. The diameter of the second through hole 303 opened on the cam 301 is larger than the outer diameter of the workpiece 5, making the cam 301 more convenient to pick up and place.

[0040] In this embodiment, the precise coordination of first through-hole 206, second through-hole 303, and accommodating groove 208 achieves precise positioning and secure support for workpiece 5. The matching of first through-hole 206 with the outer diameter of workpiece 5 ensures precise alignment during cutting, reducing cutting errors. Second through-hole 303 facilitates access to and placement of workpiece 5, while also reducing unnecessary friction and wear. Accommodating groove 208 supports and positions workpiece 5 and core 4, ensuring cutting accuracy. Its larger diameter further facilitates access to and placement of workpiece 5.

[0041] like Figure 2 As shown, in a preferred embodiment, a wear plate 209 is provided at the bottom of the blade pad 207. The blade pad 207 is slidably connected to the wear plate 209, which is in turn slidably connected to the guide rail 302. A push rod is provided at the bottom of the wear plate 209, which is connected to the movable end of a linear motion mechanism. The linear motion mechanism can be a pneumatic, hydraulic, or electric push rod. The lower end wall of the guide rail 302 is flat, allowing the wear plate 209 to slide stably within the guide rail 302, providing stable support for the lower die blade 205.

[0042] like Figure 4 and Figure 5 As shown, in a preferred embodiment, a third through-hole 105 is provided on the side of the upper limit block 103. This third through-hole 105 facilitates direct observation of the cutting process, allowing the cutting status to be monitored without disassembling the mold or interrupting the process, thereby improving production efficiency and operational convenience. Furthermore, the third through-hole 105 reduces material consumption for the upper limit block 103, lowering mold costs and weight, making it easier to inspect and maintain.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rotary cutting die suitable for forming slender tubular workpieces, characterized in that: It includes an upper mold assembly and a lower mold assembly, a workpiece is placed between the upper mold assembly and the lower mold assembly, and a core is movably placed in the workpiece; The upper die assembly includes an upper die base, an upper pad is provided at the bottom of the upper die base, an upper limit block is provided at the bottom of the upper pad, and an upper die blade is provided in the middle of the upper limit block; The lower die assembly includes a lower die base, a lower pad is provided on the top of the lower die base, a lower limit plate is provided on the top of the lower pad, a lower cover is provided on the top of the lower limit plate, and a lower die blade is provided in the middle of the lower cover and the lower limit plate.

2. A rotary cutting die suitable for forming slender tubular workpieces according to claim 1, characterized in that: The upper die assembly is provided with a rotary cutting guide mechanism, which includes a cam and a guide rail provided outside the cam. The cam is connected to the upper die blade, and the guide rail is connected to the upper pad. The cam moves vertically and horizontally along the guide rail.

3. A rotary cutting die suitable for forming slender tubular workpieces according to claim 1, characterized in that: The lower die assembly is provided with a rotary cutting guide mechanism, which includes a cam and a guide rail provided outside the cam. The cam is connected to the lower die blade, and the guide rail is connected to the lower pad. The cam moves vertically and horizontally along the guide rail.

4. A rotary cutting die suitable for forming a slender tubular workpiece according to claim 2 or 3, characterized in that: The inner wall of the guide rail is provided with a first guide portion, a second guide portion, a third guide portion and a fourth guide portion in sequence from top to bottom, and the first guide portion, the second guide portion, the third guide portion and the fourth guide portion are respectively facing the four sides of the upper mold edge.

5. A rotary cutting die suitable for forming slender tubular workpieces according to claim 3, characterized in that: A first through hole is provided at the center of the lower die blade, the diameter of the first through hole is equivalent to the outer diameter of the workpiece, and the outer diameter of the upper die blade is equivalent to the inner diameter of the workpiece.

6. A rotary cutting die suitable for forming slender tubular workpieces according to claim 5, characterized in that: The cam is located below the upper die blade, and a second through hole is formed on the cam. The diameter of the second through hole is larger than the outer diameter of the workpiece.

7. A rotary cutting die suitable for forming a slender tubular workpiece according to claim 6, characterized in that: A knife edge pad is provided at the bottom of the cam, and a receiving groove for placing a workpiece is provided at the center of the knife edge pad. The diameter of the receiving groove is larger than the diameter of the workpiece.

8. The rotary cutting die for forming a slender tubular workpiece according to claim 7, characterized in that: A wear-resistant plate is provided at the bottom of the blade pad, the blade pad is slidably connected to the wear-resistant plate, and the wear-resistant plate is slidably connected to the guide rail.

9. A rotary cutting die suitable for forming a slender tubular workpiece according to any one of claims 5 to 8, characterized in that: A third through hole is formed on the side surface of the upper limit block.

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