Burr-free cutting mechanism on continuous punching die

Abstract

The utility model discloses a burr-free cutting mechanism on a continuous stamping die, which is arranged on a stamping die, the stamping die comprises an upper die and a lower die, a cutting knife is arranged on the upper die, a lower die plate is arranged at the upper end part of the lower die, and a forming groove matched with the cutting knife is arranged on the lower die plate under the cutting knife; chamfers are formed at the upper ends of the two opposite side walls, perpendicular to the advancing direction of the plate, of the forming groove, and the size of the chamfers in the mold closing direction is equal to or larger than the thickness of the plate. The chamfers are arranged on the two opposite side walls of the forming groove in the lower die, sharp edges of opposite ends of a plate and a product can be synchronously blanked into fillets or oblique angles in the cutting process, and meanwhile the sizes of the chamfers in the die assembly direction are set to be equal to or larger than the thickness of the plate. Burr marks can be prevented from being left on the end faces of the two sides of the plate and the product, the deburring procedure does not need to be additionally added in stamping production, the appearance quality of the product can be ensured under the condition of no flash, material waste is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, in particular to a burr-free cutting mechanism on a continuous stamping die. Background Art

[0002] In the stamping process, in order to improve the utilization rate of sheet materials, flash is generally minimized or even eliminated, that is, sheet materials of matching width are selected according to the contour size of the product, and sent to the continuous die to punch holes or bending structures in sequence, and finally the sheet materials are cut into the set length with a cutting knife. For example, in the production of lock panels, holes are first punched on the sheet materials, and then they are cut at the designed length after completion. In actual production, the sheet materials on both sides of the cutting knife will be deformed during the cutting process, so burrs will be formed at both ends of each finished product (only one end for the first and last pieces), and because the flash reserved on the sheet materials is very small or even non-existent, the amount of trimming reserved for the subsequent trimming process is extremely small, resulting in the phenomenon that the product ends have favorable edges or the product contour is small; although reserving appropriate flash can solve this problem, it will reduce the utilization rate of the sheet materials and increase production costs. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model provides a burr-free cutting mechanism on a continuous die, which can synchronously punch the sharp edges of the facing ends of the sheet material and the product into rounded corners or bevels during the cutting process, and can avoid leaving burr marks on the end surfaces of both sides of the sheet material and the product. There is no need to add an additional deburring process in the stamping production, and the appearance quality of the product can be ensured without burring, thereby reducing material waste and lowering production costs.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is as follows:

[0005] A burr-free cutting mechanism on a continuous die is provided on a stamping die, the die comprises an upper die and a lower die, a cutting knife is provided on the upper die, a lower die plate is provided at the upper end of the lower die, and a forming groove matching the cutting knife is provided on the lower die plate just below the cutting knife; wherein:

[0006] The upper ends of the two opposite side walls of the molding groove that are perpendicular to the forward direction of the sheet are both formed with chamfers, and the maximum dimension of the chamfers along the mold closing direction is equal to or greater than the thickness of the sheet;

[0007] The lower die is also provided with a lower pad at the lower end of the lower template, and an avoidance groove matching the molding groove is formed on the lower pad just below the molding groove.

[0008] As a further elaboration of the above technical solution:

[0009] In the above technical solution, the size profiles of the two chamfers are the same.

[0010] In the above technical solution, the two chamfers are both rounded corners or beveled corners.

[0011] In the above technical solution, the outer contour size of the avoidance groove is greater than or equal to the cross-sectional size of the cutting knife.

[0012] In the above technical solution, a guide member extending along the mold closing direction is provided on the side of the avoidance groove on the lower pad, and the guide member passes through the lower template and extends above its upper end surface. The lower end surface of the upper mold is provided with a pressing plate adapted to the sheet material, and the pressing plate is slidably connected to the upper mold and the cutting knife.

[0013] Compared with the prior art, the beneficial effect of the utility model lies in that: by arranging chamfers on both opposite side walls of the forming groove on the lower die, the sharp edges of the opposite ends of the sheet and the product can be simultaneously punched into rounded or beveled corners during the cutting process. At the same time, by setting the dimension of the chamfer along the mold closing direction to be equal to or greater than the sheet thickness, burr marks can be avoided on the end surfaces of the sheet and the product on both sides. There is no need to add an additional deburring process in the stamping production, and the product appearance quality can be ensured without flash, reducing material waste and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the forming process of the product on the sheet in this embodiment;

[0015] Figure 2 It is a structural schematic diagram of this embodiment;

[0016] Figure 3 yes Figure 2 A schematic diagram of the structure of the middle A part;

[0017] Figure 4 It is a structural schematic diagram of a forming groove in another embodiment of the utility model.

[0018] In the figure: 10, upper die; 11, pressing plate; 20, lower die; 21, lower mold plate; 22, lower pad; 30, sheet; 40, product; 1, cutting knife; 2, forming groove; 3, chamfer; 4, avoidance groove; 5, guide; d, maximum dimension of chamfer along the direction of mold closing; t, sheet thickness. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and cannot be understood as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "several" and "multiple" mean two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In this application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features being in direct contact, or it can include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] For ease of understanding, Figure 1 The schematic diagram of the forming process of the product 40 is shown. It can be seen that in the final cutting process, the cutting blade 1 cuts the product 40 from the sheet 30. In order to avoid forming sharp edges or burrs at the facing ends of the product 40 and the sheet 30, the cutting mechanism is improved as follows.

[0022] like Figure 2As shown, a continuous die top burr-free cutting mechanism is provided on a stamping die, the die comprises an upper die 10 and a lower die 20, a cutting knife 1 is provided on the upper die 10, a lower die plate 21 is provided at the upper end of the lower die 20, and a forming groove 2 matching the cutting knife 1 is provided on the lower die plate 21 directly below the cutting knife 1; wherein:

[0023] Chamfers 3 are formed on the upper ends of two opposite side walls of the forming groove 2 which are perpendicular to the forward direction of the sheet material. The maximum dimension d of the chamfers 3 along the mold closing direction is equal to or greater than the thickness t of the sheet material.

[0024] A lower pad 22 is further provided on the lower die 20 at the lower end of the lower template 21 , and an avoidance groove 4 matching the molding groove 2 is formed on the lower pad 22 just below the molding groove 2 .

[0025] It is understandable that a too large fillet radius or a transverse span of the bevel on the chamfer 3 will cause the product 40 and the sheet 30 to be relatively difficult to process, and will leave obvious trimming marks on the opposite end faces of the product 40 and the sheet 30, affecting the appearance of the product, and there will be certain safety hazards in assembly and fitting. As a preferred embodiment, the maximum dimension d of the chamfer along the mold closing direction in this embodiment is equal to the thickness t of the sheet.

[0026] In order to ensure that two end portions with the same dimensional profile are formed on the product 40 and the sheet material 30 (ie, on all products 40 ) and to ensure the beauty of the product appearance, the dimensional profiles of the two chamfers 3 are the same. Figure 3 and Figure 4 Two embodiments of the utility model are shown. In application, the two chamfers 3 can be set as rounded corners or beveled corners according to the actual structural characteristics or appearance characteristics of the product 40; at the same time, in order to ensure the smooth operation of the mold and reduce the wear of the cutting knife 1, the outer contour size of the avoidance groove 4 is greater than or equal to the cross-sectional size of the cutting knife 1.

[0027] Furthermore, a guide member 5 extending along the mold closing direction is provided on the side of the avoidance groove 4 on the lower pad 22, and the guide member 5 passes through the lower mold plate 21 and extends above its upper end surface. The lower end surface of the upper mold 10 is provided with a pressing plate 11 adapted to the sheet material 30, and the pressing plate 11 is slidably connected to the upper mold 10 and the cutting knife 1.

[0028] It is understandable that the guide member 5 can further guide the lower pad 22, the lower mold plate 21 and the sheet 30. When the mold is opened, the pressing plate 11 slides relative to the upper mold 10 and the cutting knife 1, and can resist the sheet 30 and the product 40 in the early stage of mold opening to prevent them from jumping up, and the pressing plate 11 will recover its deformation after leaving the upper mold 10.

[0029] The utility model provides chamfers 3 on both opposite side walls of the forming groove 2 on the lower die 20, so that the sharp edges of the facing ends of the sheet material 30 and the product 40 can be simultaneously punched into rounded corners or bevels during the cutting process. At the same time, by setting the maximum dimension d along the mold closing direction on the chamfer 3 to be equal to or greater than the sheet material thickness t, burr marks can be avoided on the end surfaces of both sides of the sheet material 30 and the product 40. There is no need to add an additional deburring process in the stamping production, and the product appearance quality can be ensured without flash, thereby reducing material waste and reducing production costs.

[0030] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A burr-free cutting mechanism on a continuous die, which is arranged on a stamping die, wherein the die comprises an upper die and a lower die, wherein a cutting knife is arranged on the upper die, a lower die plate is arranged at the upper end of the lower die, and a forming groove matching the cutting knife is arranged on the lower die plate just below the cutting knife; characterized in that ； The upper ends of the two opposite side walls of the molding groove that are perpendicular to the forward direction of the sheet are both formed with chamfers, and the maximum dimension of the chamfers along the mold closing direction is equal to or greater than the thickness of the sheet; The lower die is also provided with a lower pad at the lower end of the lower template, and an avoidance groove matching the molding groove is formed on the lower pad just below the molding groove.

2. A burr-free cutting mechanism on a continuous die according to claim 1, characterized in that: The dimensional profiles of the two chamfers are the same.

3. A burr-free cutting mechanism on a continuous die according to claim 1, characterized in that: Both chamfers are rounded or beveled.

4. A burr-free cutting mechanism on a continuous die according to claim 1, characterized in that: The outer contour dimension of the avoidance groove is greater than or equal to the cross-sectional dimension of the cutting knife.

5. A burr-free cutting mechanism on a continuous die according to any one of claims 1 to 4, characterized in that: The lower pad is provided with a guide extending along the mold closing direction beside the avoidance groove, and the lower end surface of the upper mold is provided with a pressing plate adapted to the sheet material, and the pressing plate is slidably connected to the upper mold and the cutting knife.

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