Rotary cutting die for forming and cutting sections with height difference

Abstract

The rotary cutting die comprises a cam, a guide rail is arranged on the outer side of the cam, a first guide portion, a second guide portion, a third guide portion and a fourth guide portion are sequentially arranged on the inner wall of the guide rail from top to bottom, and the first guide portion and the second guide portion are opposite in direction. The first guide part is perpendicular to the third guide part in direction, and the third guide part is opposite to the fourth guide part in direction. By means of the innovative cam and the guide rail, the machining problem caused by the height difference of the cutting section of the special-shaped workpiece is solved, cutting of all edges can be completed through one-time clamping, and compared with a traditional step-by-step cutting method, the die has the advantages that the number of dies is reduced, working procedure steps are reduced, machine tool occupation is reduced, and production cost is remarkably reduced. And meanwhile, the whole cutting process is continuously finished in the same set of die, so that the problem of cutter connection caused by positioning errors in step-by-step cutting is avoided, and the flatness and the appearance quality of the end surface of the product are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and more specifically to a rotary cutting mold for forming and cutting sections with height differences. Background Art

[0002] In the processing of special-shaped workpieces, especially those with height differences in the cut section, such workpieces have one side or a group of opposite sides that are not flush. When conventional clockwise or counterclockwise single-direction cutting methods are used, interference problems between the mold and the workpiece will occur during the cutting of subsequent edges, which seriously hinders the smooth progress of the processing flow, accelerates the wear of the mold, and reduces production efficiency and mold service life.

[0003] The current commonly adopted strategy is to divide the full-circle cutting of the product into two independent steps, using two sets of molds to perform side cutting on different machine tools. Specifically, a side cut is performed on one set of opposite sides first, and then another side cut is performed on the other set of opposite sides. Although the step-by-step cutting method can solve the interference problem to a certain extent, it significantly increases the production cost, including the mold manufacturing cost, equipment occupancy cost and operation complexity. In addition, since the product needs to be positioned twice, positioning errors are difficult to completely avoid, resulting in the possibility of a knife joint, that is, a small step, on the end face of the final product, which affects the overall quality of the product and damages its appearance, making it difficult to meet high-precision processing requirements.

[0004] The above shortcomings need to be improved. Summary of the invention

[0005] In order to solve the problem that the existing special-shaped workpieces with height differences in cutting sections have low forming efficiency and forming quality, the utility model provides a rotary cutting die for forming special-shaped workpieces with height differences in cutting sections.

[0006] The technical solution of the utility model is as follows:

[0007] A rotary cutting die for forming and cutting sections with height differences, comprising a cam, a guide rail being arranged on the outer side of the cam, a first guide portion, a second guide portion, a third guide portion and a fourth guide portion being arranged on the inner wall of the guide rail in sequence from top to bottom, the first guide portion and the second guide portion being in opposite directions, the first guide portion and the second guide portion being facing edges flush with the edge of a workpiece, the first guide portion being perpendicular to the third guide portion, the third guide portion and the fourth guide portion being in opposite directions, and the third guide portion and / or the fourth guide portion being facing edges with height differences on the edge of the workpiece.

[0008] Further, it comprises an upper die assembly and a lower die assembly, the cam is slidably connected to the lower die assembly, and the guide rail is fixedly mounted on the lower die assembly;

[0009] Alternatively, the cam is slidably connected to the upper mold assembly, and the guide rail is fixedly mounted on the upper mold assembly.

[0010] Further, the upper die assembly comprises an upper die seat, an upper pad is arranged at the bottom of the upper die seat, an upper clamp is arranged at the bottom of the upper pad, and an upper die blade is arranged in the middle of the upper clamp;

[0011] The lower die assembly comprises a lower die base, a lower pad is arranged on the top of the lower die base, a lower baffle is arranged on the top of the lower pad, and a lower die blade is arranged in the middle of the lower baffle;

[0012] A core for placing a workpiece is arranged on the upper die cutting edge or the lower die cutting edge, and the cam and the core are arranged on the upper die cutting edge or the lower die cutting edge correspondingly.

[0013] Furthermore, a first pushing mechanism is provided on the upper die assembly, and the first pushing mechanism includes an upper push rod slidably connected to the upper pad, a first spring is provided between the upper push rod and the upper die seat, and an upper pressure block connected to the upper push rod is provided in the middle of the upper die blade.

[0014] Furthermore, a first stop screw is threadedly connected to the upper die seat, and two ends of the first spring are respectively in contact with the first stop screw and the upper ejector rod.

[0015] Furthermore, a limiting portion is provided on the top of the upper push rod, a first through hole is provided on the upper pad, and a diameter of the limiting portion is greater than an inner diameter of the first through hole.

[0016] Furthermore, a second pushing mechanism is provided on the lower die assembly, and the second pushing mechanism includes a lower push rod slidably connected to the lower die cutting edge, a second spring is provided between the lower push rod and the lower die cutting edge, and a lower push block abutting against the lower push rod is provided on the top of the lower die cutting edge.

[0017] Furthermore, a second stop screw is threadedly connected to the lower die base, and two ends of the second spring are respectively in contact with the second stop screw and the lower ejector rod.

[0018] Furthermore, a contour sleeve is provided on the lower top block, the top of the contour sleeve is threadedly connected to the lower top block, a second through hole is provided on the lower die blade, the middle part of the contour sleeve passes through the second through hole, and a limiting disk is provided at the bottom of the contour sleeve, and the diameter of the limiting disk is larger than the inner diameter of the second through hole.

[0019] Furthermore, a plurality of limiting columns are provided on the upper mold assembly or the lower mold assembly, and the limiting columns are used to limit the minimum distance between the upper mold assembly and the lower mold assembly.

[0020] The utility model according to the above scheme has the beneficial effect that the utility model solves the processing problem caused by the height difference of the cutting section of the special-shaped workpiece through the innovative cam and guide rail, and the cutting of all edges can be completed in one clamping. Compared with the traditional step-by-step cutting method, the mold reduces the number of molds, process steps and machine tool occupancy, and significantly reduces the production cost. At the same time, since the entire cutting process is completed continuously in the same set of molds, the problem of knife connection caused by positioning error in step-by-step cutting is avoided, and the flatness and appearance quality of the product end face are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0022] Figure 1 This is a schematic diagram of the structure of the workpiece just after cutting;

[0023] Figure 2 It is a structural schematic diagram of the front side of the workpiece;

[0024] Figure 3 It is a schematic diagram of the structure on the back of the workpiece;

[0025] Figure 4 It is a three-dimensional structural schematic diagram of the utility model;

[0026] Figure 5 It is a longitudinal cross-sectional structural schematic diagram of the utility model in the mold opening state;

[0027] Figure 6 It is a schematic diagram of the cross-sectional structure of the utility model in the mold opening state;

[0028] Figure 7 It is a schematic diagram of the longitudinal cross-sectional structure of the utility model in the closed mold state;

[0029] Figure 8 It is a schematic diagram of the cross-sectional structure of the utility model in the closed mold state;

[0030] Fig. 9 It is a schematic diagram of the half-section three-dimensional structure of the utility model in the mold opening state.

[0031] Among them, the reference numerals in the figure are: 1, cam; 2, guide rail; 201, first guide part; 202, second guide part; 203, third guide part; 204, fourth guide part; 3, upper die assembly; 301, upper die seat; 302, upper pad; 303, upper clamp; 304, upper die blade; 4, lower die assembly; 401, lower die seat; 402, lower pad; 403, baffle; 404, lower die blade; 5, first pushing mechanism; 501, upper ejector rod; 502, first spring; 503, upper pressure block; 504, first stop screw; 6, second pushing mechanism; 601, lower ejector rod; 602, second spring; 603, lower ejector block; 604, second stop screw; 7, equal height sleeve; 8, limit column; 9, workpiece. DETAILED DESCRIPTION

[0032] 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 in conjunction with 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 used to limit the present invention.

[0033] 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 should not be construed as limitations on the present technical solution. The terms "first", "second", etc. are only used for the convenience of description and should not be construed 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.

[0034] like Figures 1 to 9As shown, a rotary cutting die for forming and cutting sections with height difference described in one embodiment of the utility model comprises an upper die assembly 3, a lower die assembly 4 and a cam 1, a guide rail 2 is arranged on the outer side of the cam 1, the cam 1 is slidably connected to the lower die assembly 4, the guide rail 2 is fixedly mounted on the lower die assembly 4, and the inner wall of the guide rail 2 is provided with a first guide portion 201, a second guide portion 202, a third guide portion 203 and a fourth guide portion 204 from top to bottom, the first guide portion 201 and the second guide portion 202 are opposite in direction, the first guide portion 201 and the second guide portion 202 are flush with the edge of the workpiece 9, the first guide portion 201 is perpendicular to the third guide portion 203, the third guide portion 203 and the fourth guide portion 204 are opposite in direction, so that the cam 1 first moves in a first direction through the first guide portion 201 and the second guide portion 202, and then moves in a second direction perpendicular to the first direction through the third guide portion 203 and the fourth guide portion 204, and the third guide portion 203 and / or the fourth guide portion 204 are toward the edge of the workpiece 9 with height difference. The guide part includes a protrusion and a groove arranged opposite to each other, which are respectively arranged on two opposite inner walls of the guide rail 2, and the protrusion and the groove change the movement direction of the cam 1. Specifically, the first guide part 201 makes the cam 1 move in the positive direction of the X axis, and the second guide part 202 makes the cam 1 move in the negative direction of the X axis, first cutting a set of aligned opposite sides of the workpiece 9, that is, two short sides; the third guide part 203 makes the cam 1 move in the positive direction of the Y axis, and the fourth guide part 204 makes the cam 1 move in the positive direction of the Y axis, and then cuts a set of uneven opposite sides on the workpiece 9, that is, two long sides.

[0035] The upper die assembly 3 includes an upper die base 301, an upper pad 302 is arranged at the bottom of the upper die base 301, an upper clamping plate 303 is arranged at the bottom of the upper pad 302, and an upper die cutting edge 304 is arranged in the middle of the upper clamping plate 303; the lower die assembly 4 includes a lower die base 401, a lower pad 402 is arranged at the top of the lower die base 401, a lower baffle 403 is arranged at the top of the lower pad 402, a lower die cutting edge 404 is arranged in the middle of the lower baffle 403, a core for placing a workpiece 9 is arranged on the lower die cutting edge 404, and the cam 1 is arranged on the outside of the lower die cutting edge 404.

[0036] Under the guidance of the guide rail 2, the cam 1 moves in the positive direction of the X-axis along the first guide part 201, driving the upper die blade 304 in the upper die assembly 3 to cooperate with the lower die blade 404 in the lower die assembly 4 to cut the first side of the workpiece 9 that is flush. After the cutting is completed, it returns to the initial position, and the cam 1 then moves in the negative direction of the X-axis under the action of the second guide part 202 to cut the second side of the workpiece 9 that is flush. Subsequently, the cam 1 moves in the positive direction of the Y-axis under the action of the third guide part 203 to cut the third side of the workpiece 9 that is not flush. Since the first side and the second side are both flush sides, the workpiece 9 will not interfere with the movement of the mold. It should be noted that the first side and the second side do not have to be at the same height. Then, under the action of the fourth guide part 204, the cam 1 cuts the fourth side of the workpiece 9 that is not flush, and finally completes the cutting of a group of uneven opposite sides. Similarly, since the first side and the second side are both flush sides, the workpiece 9 will not interfere with the movement of the mold.

[0037] The rotary cutting die solves the processing problem caused by the height difference of the cutting section of the special-shaped workpiece 9 through the innovative cam 1 and guide rail 2. The cutting of all edges can be completed in one clamping. Compared with the traditional step-by-step cutting method, the die reduces the number of dies, process steps and machine tool occupancy, significantly reducing production costs. At the same time, since the entire cutting process is completed continuously in the same set of dies, the problem of knife connection caused by positioning error in step-by-step cutting is avoided, and the flatness and appearance quality of the product end face are guaranteed.

[0038] In practical application, the cam 1 and the guide rail 2 can be arranged on the upper mold assembly 3, the cam 1 is slidably connected to the upper mold assembly 3, and the guide rail 2 is fixedly installed on the upper mold assembly 3. Specifically, the cam 1 is arranged on the upper mold blade 304, and the core is also arranged on the upper mold blade 304.

[0039] like Figures 5 to 9 As shown, in a preferred embodiment, a first pushing mechanism 5 is provided on the upper mold assembly 3, and the first pushing mechanism 5 includes an upper push rod 501 slidably connected to the upper pad 302, a first spring 502 is provided between the upper push rod 501 and the upper mold base 301, and an upper pressure block 503 connected to the upper push rod 501 is provided in the middle of the upper mold blade 304.

[0040] A first stop screw 504 is threadedly connected to the upper die seat 301 , and two ends of the first spring 502 are respectively in contact with the first stop screw 504 and the upper ejector rod 501 .

[0041] During the cutting process, as the cam 1 moves along the guide rail 2, the upper die assembly 3 gradually approaches the lower die assembly 4. The upper die assembly 3 can be driven downward by the push rod, or the lower die assembly 4 can be driven upward. At this time, the upper pressing block 503 begins to move upward due to the reaction force of the upper surface of the workpiece 9, pushing the upper push rod 501 to move upward, and the first spring 502 is compressed, so that the upper pressing block 503 fits tightly against the upper surface of the workpiece 9, effectively pressing the workpiece 9, and reducing the vibration or dislocation of the workpiece 9 during the cutting process that affects the cutting quality. After the cutting is completed, as the cam 1 moves in the opposite direction, the upper die assembly 3 gradually moves away from the lower die assembly 4, and the first spring 502 pushes the upper push rod 501 and the upper pressing block 503 downward under the action of the restoring force, and at this time the upper pressing block 503 pushes the workpiece 9 out of the upper die blade 304.

[0042] In this embodiment, the efficiency of the cutting operation is improved by setting the first pushing mechanism 5. The upper push rod 501 and the upper pressure block 503 in the first pushing mechanism 5 work together, which can not only effectively press the workpiece 9 during cutting to prevent the workpiece 9 from shifting during the cutting process, thereby ensuring the accuracy of cutting; but also can automatically push out the workpiece 9 after cutting using the elastic force of the first spring 502, thereby improving production efficiency. In addition, the setting of the first stop screw 504 not only facilitates the installation and disassembly of the upper push rod 501, but also allows the user to adjust the elastic force of the first spring 502 according to actual needs, thereby optimizing the pressing and pushing effects, further enhancing the adaptability and flexibility of the device.

[0043] like Figures 5 to 9 As shown, in a preferred embodiment, a limiting portion is provided at the top of the upper push rod 501, a first through hole is provided on the upper pad 302, and the diameter of the limiting portion is greater than the inner diameter of the first through hole. The limiting portion prevents the upper push rod 501 from passing through the first through hole, thereby ensuring the stability of the structure and thus ensuring the stability of production.

[0044] like Figures 5 to 7 As shown, in a preferred embodiment, a second pushing mechanism 6 is provided on the lower mold assembly 4, and the second pushing mechanism 6 includes a lower push rod 601 slidably connected to the lower mold cutting edge 404, a second spring 602 is provided between the lower push rod 601 and the lower mold cutting edge 404, and a lower push block 603 abutting against the lower push rod 601 is provided on the top of the lower mold cutting edge 404.

[0045] A second stop screw 604 is threadedly connected to the lower die base 401 , and two ends of the second spring 602 are respectively in contact with the second stop screw 604 and the lower ejector rod 601 .

[0046] A contour sleeve 7 is arranged on the lower top block 603, the top of the contour sleeve 7 is threadedly connected to the lower top block 603, a second through hole is arranged on the lower die blade 404, the middle part of the contour sleeve 7 passes through the second through hole, the middle diameter of the contour sleeve 7 is smaller than the inner diameter of the second through hole, and a limiting disk is arranged at the bottom of the contour sleeve 7, and the diameter of the limiting disk is larger than the inner diameter of the second through hole.

[0047] At the beginning of the cutting operation, the workpiece 9 is placed on the core. As the upper mold assembly 3 descends, the upper mold blade 304 and the lower mold blade 404 gradually approach each other to shear the workpiece 9. At this time, the core moves downward, and the lower ejector rod 601 moves downward accordingly, compressing the second spring 602, and the workpiece 9 is clamped by the core and the upper pressure block 503. After the cutting is completed, as the upper mold assembly 3 rises, the second spring 602 pushes the lower ejector rod 601 upward under the action of the restoring force, and the core also moves upward, and the core pushes the workpiece 9 out of the lower mold blade 404. At the same time, the equal height sleeve 7 limits the upward movement distance of the lower ejector rod 601.

[0048] In this embodiment, by setting up the second pushing mechanism 6, the cutting quality of the workpiece 9 is guaranteed and the material can be discharged automatically. The lower ejector block 603 supports the workpiece 9 during cutting to ensure stability during the cutting process, and pushes out the workpiece 9 after cutting to facilitate discharging. In addition, the second stop screw 604 makes the installation and disassembly of the lower ejector rod 601 more convenient, and also facilitates the adjustment of the elastic force of the second spring 602, so that the pushing force can be flexibly adjusted according to production needs to ensure smooth discharging and the integrity of the workpiece 9. In addition, the equal height sleeve 7 and the limit plate improve the stability of the lower ejector block 603, prevent displacement or tilting during the cutting and discharging process, and improve the reliability of the equipment.

[0049] like Figure 5 and Figure 7 As shown, in a preferred embodiment, a plurality of limiting columns 8 are provided on the upper mold assembly 3 or the lower mold assembly 4 , and the limiting columns 8 are used to limit the minimum distance between the upper mold assembly 3 and the lower mold assembly 4 .

[0050] During the cutting process, as the upper mold assembly 3 gradually approaches the lower mold assembly 4, when the distance between the upper and lower mold assemblies 4 is reduced to a preset minimum value, the limit posts 8 will contact each other to prevent the upper mold assembly 3 from moving further downward.

[0051] In this embodiment, by setting the limit column 8 to limit the minimum distance between the upper and lower mold assemblies 4, problems such as mold damage, workpiece 9 deformation and equipment failure caused by excessive compression are avoided, thereby improving the stability and reliability of the production process.

[0052] like Figure 5 and Figure 7As shown, in a preferred embodiment, a pad is connected to the bottom of the cam 1, a wear-resistant plate is arranged at the bottom of the pad, the pad slides on the wear-resistant plate, the wear-resistant plate is slidably connected to the guide rail 2, a push rod is arranged at the bottom of the wear-resistant plate, the push rod is slidably connected to the lower die seat 401, and the push rod drives the active end of the linear motion mechanism to be connected. The linear motion mechanism can be a pneumatic push rod, a hydraulic push rod or an electric push rod. The lower end wall of the guide rail 2 is flat, so that the wear-resistant plate can slide stably in the guide rail 2 and stably support the lower die blade 404.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary cutting die for forming and cutting sections with height differences, characterized in that: It includes a cam, a guide rail is arranged on the outer side of the cam, and the inner wall of the guide rail is provided with a first guide part, a second guide part, a third guide part and a fourth guide part in sequence from top to bottom, the first guide part and the second guide part are opposite in direction, the first guide part and the second guide part are facing the edge flush with the edge of the workpiece, the first guide part is perpendicular to the direction of the third guide part, the third guide part and the fourth guide part are opposite in direction, and the third guide part and / or the fourth guide part are facing the edge of the workpiece with a height difference.

2. A rotary cutting die for forming and cutting sections with height differences according to claim 1, characterized in that: It comprises an upper die assembly and a lower die assembly, the cam is slidably connected to the lower die assembly, and the guide rail is fixedly mounted on the lower die assembly; Alternatively, the cam is slidably connected to the upper mold assembly, and the guide rail is fixedly mounted on the upper mold assembly.

3. A rotary cutting die for forming and cutting sections with height differences according to claim 2, characterized in that: The upper die assembly comprises an upper die seat, an upper pad is provided at the bottom of the upper die seat, an upper clamp is provided at the bottom of the upper pad, and an upper die blade is provided in the middle of the upper clamp; The lower die assembly comprises a lower die base, a lower pad is arranged on the top of the lower die base, a lower baffle is arranged on the top of the lower pad, and a lower die blade is arranged in the middle of the lower baffle; A core for placing a workpiece is arranged on the upper die cutting edge or the lower die cutting edge, and the cam and the core are arranged on the upper die cutting edge or the lower die cutting edge correspondingly.

4. A rotary cutting die for forming and cutting sections with height differences according to claim 3, characterized in that: The upper die assembly is provided with a first pushing mechanism, which includes an upper push rod slidably connected to the upper pad, a first spring is provided between the upper push rod and the upper die seat, and an upper pressure block connected to the upper push rod is provided in the middle of the upper die blade.

5. A rotary cutting die for forming and cutting sections with height differences according to claim 4, characterized in that: The upper die seat is threadedly connected with a first stop screw, and two ends of the first spring are respectively in contact with the first stop screw and the upper ejector rod.

6. A rotary cutting die for forming and cutting sections with height differences according to claim 4, characterized in that: A limiting portion is provided on the top of the upper push rod, a first through hole is provided on the upper pad, and a diameter of the limiting portion is greater than an inner diameter of the first through hole.

7. A rotary cutting die for forming and cutting sections with height differences according to claim 3, characterized in that: The lower die assembly is provided with a second pushing mechanism, which includes a lower ejector rod slidably connected to the lower die cutting edge, a second spring is provided between the lower ejector rod and the lower die cutting edge, and a lower ejector block abutting against the lower ejector rod is provided at the top of the lower die cutting edge.

8. A rotary cutting die for forming and cutting sections with height differences according to claim 7, characterized in that: The lower die seat is threadedly connected with a second stop screw, and two ends of the second spring are respectively in contact with the second stop screw and the lower ejector rod.

9. A rotary cutting die for forming and cutting sections with height differences according to claim 7, characterized in that: The lower top block is provided with an equal height sleeve, the top of the equal height sleeve is threadedly connected to the lower top block, the lower die blade is provided with a second through hole, the middle of the equal height sleeve passes through the second through hole, and the bottom of the equal height sleeve is provided with a limiting disk, the diameter of the limiting disk is larger than the inner diameter of the second through hole.

10. A rotary cutting die for forming and cutting sections with height differences according to any one of claims 2 to 7, characterized in that: A plurality of limiting columns are arranged on the upper mold assembly or the lower mold assembly, and the limiting columns are used to limit the minimum distance between the upper mold assembly and the lower mold assembly.

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