A full no-edge rotary mold

Abstract

The utility model provides a kind of full no-edge big rotary die, including upper die, lower die and material belt, material belt is fixedly arranged on lower die, upper die includes punching punch and blanking punch, lower die includes blanking recess die and recess die fixing plate of fixed blanking recess die, material belt side is provided with several profile hole forming area and product preforming area, several product preforming areas are directly connected, material belt steps, punching punch is stamped to profile hole forming area, product is punched out, blanking recess die is rotated 90 degrees after blanking punch is stamped to material belt, product is punched out again, compared with prior art, the utility model's big rotary die is directly seamless connection in product preforming area on material belt, material belt only plays the role of cutting off when blanking, avoid product profile and recess die cavity scrape out filament;Blanking recess die of die is rotated 90 degrees after each blanking, four long straight edges on blanking recess die become blanking edge alternately, so that the size of product after forming remains stable.

Description

Technical Field

[0001] This utility model relates to the field of mold stamping technology, and in particular to a large-rotation mold with no edge. Background Technology

[0002] In traditional blanking dies, only one edge of the die needs to perform the blanking function, and the non-blank edge can be chamfered to avoid friction and scraping between the product and the cavity. However, for large rotary dies that need to rotate 90° periodically, the four long straight edges of the die will be used alternately as blanking blanking edges, and must be kept sharp without chamfers to meet the needs of continuous blanking. Existing technology has the following defects: 1. Scrap risk: When the die rotates, the straight edge of the cavity without chamfers fits tightly against the straight edge of the product shape, and is very easy to scrape and generate metal wires during feeding or ejection, resulting in scratches and contamination on the product surface; 2. Functional contradiction: If chamfering is used to avoid scraping, the edge strength will be weakened, causing blanking burrs or even chipping; if it is kept sharp, the scraping problem cannot be completely solved; 3. Insufficient reliability: Conventional die cavities are designed according to the pitch (L) and other dimensions. Under rotation conditions, due to the lack of a dynamic anti-air mechanism, the defect rate of fine wires is high, which seriously affects the stability of mass production. Utility Model Content

[0003] In view of the shortcomings and defects of the existing technology, a fully edgeless large rotary mold is provided. In order to achieve the purpose of punching out products without any edges and with a better blanking effect, the present invention provides the following technical solution.

[0004] A fully edgeless large rotary mold includes an upper mold, a lower mold, and a strip material. The strip material is fixedly mounted on the lower mold. The upper mold includes a punching punch and a blanking punch. The lower mold includes a blanking die and a die fixing plate for fixing the blanking die. Several external hole forming areas and product pre-forming areas are provided on both sides of the strip material. The several product pre-forming areas are directly connected. The strip material steps forward, and the punching punch presses the external hole forming areas to punch out the product. After the blanking die rotates 90 degrees, the blanking punch presses the strip material again to punch out the product.

[0005] Compared with existing technologies, this practical large rotary die directly and seamlessly connects the product pre-forming area on the strip. The strip only plays a cutting role when the material is dropped, avoiding the product shape from being scraped by the die cavity. The die's dropping die rotates 90 degrees after each dropping, and the four long straight edges on the dropping die alternately become the punching edges, so that the dimensions of the formed product remain stable.

[0006] Furthermore, the straight edge length of the product is the same as the step length of the strip, and its size is L. The straight edge size of the blanking cavity is 0.3mm larger than the straight edge length of the product, that is, the size is L+0.3.

[0007] Through the above improvements, the straight edge dimension of the blanking die cavity is designed to be 0.3mm larger than the step distance, which can prevent the blanking die cavity without chamfering during large rotation from scraping out fine wires from the straight edge of the product shape.

[0008] Furthermore, the material strip includes a first column and a second column, and the product includes a front straight edge, a rear straight edge, an upper straight edge, and a lower straight edge. The front straight edge and the rear straight edge disposed on the first column and the second column coincide, and the lower straight edge on the first column coincides with the upper straight edge on the second column.

[0009] With the above improvements, the material strip includes a first column and a second column. The products set on the material strip include a front straight edge, a rear straight edge, an upper straight edge, and a lower straight edge. The rear straight edge of the first column or the front straight edge coincides with the front straight edge, so that the products to be punched are in a borderless state on the first column or the second column. The lower straight edge of the first column coincides with the upper straight edge of the second column, so that the products in the first column and the second column are in a borderless state.

[0010] Furthermore, the blanking punch includes a first punch and a second punch, the straight edge length of the first punch and the second punch being L+0.22; the blanking die includes a first die and a second die, the straight edge length of the first die and the second die being L+0.3; the first punch and the first die are respectively disposed at the upper end and the lower end of the first column, and the second punch and the second die are respectively disposed at the upper end and the lower end of the second column.

[0011] Through the above improvements, the blanking punch includes a first punch and a second punch, with the straight edge length of the first punch and the second punch being L+0.22. The blanking die includes a first die and a second die, with the straight edge length of the first die and the second die being L+0.3. This ensures that the straight edge length of the blanking die is always greater than that of the blanking punch, preventing fine threads from being scraped off the straight edge of the product during punching.

[0012] Furthermore, the strip is provided with a first station, a second station, a third station, a fourth station and a fifth station, the punching punch is disposed between the first station and the second station, the first punch and the first die are disposed on the fifth station, and the second punch and the second die are disposed on the third station.

[0013] With the above improvements, the punching punch is set between the first and second stations, which makes it convenient to punch out the outer hole of the product before punching, so as to facilitate direct cutting in the future; the first punch and the second punch are set at the fifth and third stations respectively, so that there is no interference between the first punch and the second punch during use, and they can form the first column and the second column of the strip respectively.

[0014] Furthermore, in the first column, when the first punch moves toward the first die, the front straight edge is formed at the fifth station, and the distance between the front straight edge and the center of the product is a1, with a dimension a1 = half the length of the first die = L / 2 + 0.15; the rear straight edge is formed at the fourth station, and the distance between the center of the product and the rear straight edge is a2, with a dimension a2 = step distance - half the length of the first punch = L - (L / 2 + 0.11) = L / 2 - 0.11; the distance between the upper straight edge and the center of the product is b1, with a dimension b1 = L / 2; when the second punch moves toward the second die, the lower straight edge is formed at the third station, and the distance between the center of the product and the lower straight edge is b2, with a dimension b2 = L - half the length of the second punch = L - (L / 2 + 0.11) = L / 2 - 0.11.

[0015] With the above improvements, since the first punch rotates 90 degrees after each stamping, only the straight edge of the product side during stamping will be the same size as the cavity of the die. The straight edge dimensions of other product shapes are smaller than the die, thus avoiding the product straight edge scraping out fine threads from the un-beveled first cavity.

[0016] Furthermore, in the second column, when the second punch moves toward the second die, the front straight edge is formed at the third station, and the distance between the front straight edge and the center of the product is a1, with a dimension a1 = half the length of the second die = L / 2 + 0.15; the rear straight edge is formed at the second station, and the distance between the center of the product and the rear straight edge is a2, with a dimension a2 = step distance - half the length of the second punch = L - (L / 2 + 0.11) = L / 2 - 0.11; the upper straight edge is formed at the third station, and the distance between the upper straight edge and the center of the product is b1, with a dimension b1 = half the length of the second die = L / 2 + 0.15; the lower straight edge is formed at the third station, and the distance between the center of the product and the lower straight edge is b2, with a dimension b2 = step distance - half the length of the second punch = L - (L / 2 + 0.11) = L / 2 - 0.11.

[0017] With the above improvements, since the second punch rotates 90 degrees after each stamping, only the straight edge of the product side during stamping will be the same size as the cavity of the die. The straight edge dimensions of other product shapes are smaller than the die, thus avoiding the product straight edge scraping out fine threads from the un-beveled second cavity. Attached Figure Description

[0018] Figure 1 This is a structural diagram of a strip material and the upper and lower dies for a fully edgeless large rotary die;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of a large rotary mold with no edges.

[0020] Figure 3 This is a structural diagram of a product made of a large, edgeless rotary mold.

[0021] Among them, 101, first station; 102, second station; 103, third station; 104, fourth station; 105, fifth station; 1, upper die; 1.1, punching punch; 1.2, blanking punch; 1.21, first punch; 1.22, second punch; 2, lower die; 2.1, blanking die; 2.11, first die; 2.12, second die; 2.2, die fixing plate; 3, strip; 3.1, outer hole forming area; 3.2, product preforming area; 3.3, product; 3.31, first column; 3.32, second column; 3.33, front straight edge; 3.34, rear straight edge; 3.35, upper straight edge; 3.36, lower straight edge. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] like Figures 1 to 3 As shown, a fully edgeless large rotary mold includes an upper mold 1, a lower mold 2, and a strip 3. The strip 3 is fixedly mounted on the lower mold 2. The upper mold 1 includes a punching punch 1.1 and a blanking punch 1.2. The lower mold 2 includes a blanking die 2.1 and a die fixing plate 2.2 for fixing the blanking die 2.1. Several external hole forming areas 3.1 and product 3.3 pre-forming areas 3.2 are provided on both sides of the strip 3. The several product 3.3 pre-forming areas 3.2 are directly connected. The strip 3 steps forward. The punching punch 1.1 punches the external hole forming area 3.1, and the blanking punch 1.2 punches the product 3.3 pre-forming area 3.2. After the blanking die 2.1 rotates 90 degrees, the blanking punch 1.2 punches the strip 3 again, punching out the product 3.3.

[0025] The straight edge length of product 3.3 is the same as the pitch length of strip 3, and its dimension is L. The straight edge dimension of blanking die 2.1 cavity is 0.3mm larger than the straight edge length of product 3.3, that is, the dimension is L+0.3. Designing the straight edge dimension of blanking die 2.1 cavity to be 0.3mm larger than the pitch can prevent the blanking die 2.1 cavity with large rotation and no chamfer from scraping fine wires from the straight edge of product 3.3.

[0026] The strip 3 includes a first column 3.31 and a second column 3.32. The product 3.3 includes a front straight edge 3.33, a rear straight edge 3.34, an upper straight edge 3.35, and a lower straight edge 3.36. The front straight edge 3.33 and the rear straight edge 3.34 on the first column 3.31 and the second column 3.32 overlap, so that the product 3.3 to be punched is in a borderless state on the first column 3.31 or the second column 3.32. The lower straight edge 3.36 on the first column 3.31 overlaps with the upper straight edge 3.35 on the second column 3.32, so that the product 3.3 on the first column 3.31 and the second column 3.32 is in a borderless state.

[0027] The blanking punch 1.2 includes a first punch 1.21 and a second punch 1.22, the straight edge length of the first punch 1.21 and the second punch 1.22 is L+0.22; the blanking die 2.1 includes a first die 2.11 and a second die 2.12, the straight edge length of the first die 2.11 and the second die 2.12 is L+0.3, so that the straight edge length of the blanking die 2.1 is always greater than that of the blanking punch 1.2, preventing fine wires from being scraped off the straight edge of the product 3.3 during punching; the first punch 1.21 and the first die 2.11 are respectively disposed at the upper and lower ends of the first column 3.31, and the second punch 1.22 and the second die 2.12 are respectively disposed at the upper and lower ends of the second column 3.32.

[0028] The strip 3 is provided with a first station 101, a second station 102, a third station 103, a fourth station 104, and a fifth station 105. The punching punch 1.1 is located between the first station 101 and the second station 102, which facilitates punching out the outer hole of the product 3.3 before punching, so as to facilitate direct cutting later. The first punch 1.21 and the first die 2.11 are located on the fifth station 105, and the second punch 1.22 and the second die 2.12 are located on the third station 103, so that the first punch 1.21 and the second punch 1.22 do not interfere with each other during use, and can respectively form the first column 3.31 and the second column 3.32 of the strip 3.

[0029] In the first column 3.31, when the first punch 1.21 moves toward the first die 2.11, the front straight edge 3.33 is formed on the fifth station 105. The distance between the front straight edge 3.33 and the center of the product 3.3 is a1, and its dimension a1 = half the length of the first die 2.11 = L / 2 + 0.15; The rear straight edge 3.34 is formed on the fourth station 104. The distance between the center of product 3.3 and the rear straight edge 3.34 is a2, and its dimension a2 = step distance - half the length of the first punch 1.21 = L - (L / 2 + 0.11) = L / 2 - 0.11; The distance between the upper straight edge 3.35 and the center of product 3.3 is b1, and its dimension b1 = L / 2; When the second punch 1.22 moves toward the second die 2.12, the lower straight edge 3.36 is formed on the third station 103. The distance between the center of product 3.3 and the lower straight edge 3.36 is b2, and its dimension b2 = L - half the length of the second punch 1.22 = L - (L / 2 + 0.11) = L / 2 - 0.11; Since the first punch 1.21 rotates 90 degrees after each stamping, only the straight edge of the side of the stamped product 3.3 will be the same size as the cavity of the die. The straight edge dimensions of the other product 3.3 are smaller than the die, thus avoiding the straight edge of the product 3.3 scraping out fine threads from the un-beveled cavity of the first die 2.11.

[0030] In the second column 3.32, when the second punch 1.22 moves toward the second die 2.12, the front straight edge 3.33 is formed on the third station 103. The distance between the front straight edge 3.33 and the center of the product 3.3 is a1, and its dimension a1 = half the length of the second die 2.12 = L / 2 + 0.15; the rear straight edge 3.34 is formed on the second station 102. The distance between the center of the product 3.3 and the rear straight edge 3.34 is a2, and its dimension a2 = step distance - half the length of the second punch 1.22 = L - (L / 2 + 0.11) = L / 2 - 0.11; the upper straight edge 3.35 is formed on the third station 103. The distance between the upper straight edge 3.35 and the center of the product 3.3 is b1, and its dimension b1 = half the length of the second die 2.12 = L / 2+0.15; The lower straight edge 3.36 is formed on the third station 103. The distance between the center of product 3.3 and the lower straight edge 3.36 is b2, and its size b2 = step distance - half the length of the second punch 1.22 = L - (L / 2+0.11) = L / 2 - 0.11; Since the second punch 1.22 rotates 90 degrees after each stamping, only the straight edge of the side of product 3.3 during stamping will be the same as the size of the cavity of the die. The straight edge size of other parts of product 3.3 is smaller than that of the die, which avoids the straight edge of product 3.3 scraping out fine threads from the un-beveled cavity of the second die 2.12.

[0031] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A large-scale rotating mold with no edges, characterized in that: The device includes an upper die (1), a lower die (2), and a strip (3). The strip (3) is fixedly mounted on the lower die (2). The upper die (1) includes a punching punch (1.1) and a blanking punch (1.2). The lower die (2) includes a blanking die (2.1) and a die fixing plate (2.2) for fixing the blanking die (2.1). The strip (3) has several external hole forming areas (3.1) and product (3.3) preforming areas (3.2) on both sides. The several product (3.3) preforming areas (3.2) are directly connected. The strip (3) steps forward. The punching punch (1.1) punches the external hole forming area (3.1) to punch out the product (3.3). After the blanking die (2.1) rotates 90 degrees, the blanking punch (1.2) punches the strip (3) again to punch out the product (3.3).

2. The edgeless large rotary mold according to claim 1, characterized in that: The straight edge length of the product (3.3) is the same as the pitch length of the strip (3), and its size is L. The straight edge size of the blanking die (2.1) cavity is 0.3mm larger than the straight edge length of the product (3.3), that is, the size is L+0.

3.

3. The edgeless large rotary mold according to claim 1, characterized in that: The strip (3) includes a first column (3.31) and a second column (3.32). The product (3.3) includes a front straight edge (3.33), a rear straight edge (3.34), an upper straight edge (3.35), and a lower straight edge (3.36). The front straight edge (3.33) on the first column (3.31) and the rear straight edge (3.34) coincide, and the lower straight edge (3.36) on the first column (3.31) coincides with the upper straight edge (3.35) on the second column (3.32).

4. A fully edgeless large rotary mold according to claim 3, characterized in that: The blanking punch (1.2) includes a first punch (1.21) and a second punch (1.22), the straight edge length of the first punch (1.21) and the second punch (1.22) is L+0.22; the blanking die (2.1) includes a first die (2.11) and a second die (2.12), the straight edge length of the first die (2.11) and the second die (2.12) is L+0.3; the first punch (1.21) and the first die (2.11) are respectively disposed at the upper end and the lower end of the first column (3.31), and the second punch (1.22) and the second die (2.12) are respectively disposed at the upper end and the lower end of the second column (3.32).

5. A fully edgeless large rotary mold according to claim 4, characterized in that: The strip (3) is provided with a first station (101), a second station (102), a third station (103), a fourth station (104) and a fifth station (105). The punching punch (1.1) is located between the first station (101) and the second station (102). The first punch (1.21) and the first die (2.11) are located on the fifth station (105). The second punch (1.22) and the second die (2.12) are located on the third station (103).

6. A fully edgeless large rotary mold according to claim 5, characterized in that: In the first column (3.31), when the first punch (1.21) moves toward the first die (2.11), the front straight edge (3.33) is formed on the fifth station (105). The distance between the front straight edge (3.33) and the center of the product (3.3) is a1, and its dimension a1 = half the length of the first die (2.11) = L / 2+0.15; The rear straight edge (3.34) is formed on the fourth station (104), and the distance between the center of the product (3.3) and the rear straight edge (3.34) is a2, the size of which is a2 = step distance - half the length of the first punch (1.21) = L - (L / 2+0.11) = L / 2 - 0.11; The distance between the upper straight edge (3.35) and the center of the product (3.3) is b1, the size of which is b1 = L / 2; When the second punch (1.22) moves toward the second die (2.12), the lower straight edge (3.36) is formed on the third station (103), and the distance between the center of the product (3.3) and the lower straight edge (3.36) is b2, the size of which is b2 = L - half the length of the second punch (1.22) = L - (L / 2 + 0.11) = L / 2 - 0.

11.

7. A fully edgeless large rotary mold according to claim 5, characterized in that: In the second column (3.32), as the second punch (1.22) moves toward the second die (2.12), the front straight edge (3.33) is formed on the third station (103). The distance between the front straight edge (3.33) and the center of the product (3.3) is a1, and its dimension a1 = half the length of the second die (2.12) = L / 2+0.15; The rear straight edge (3.34) is formed on the second station (102), and the distance between the center of the product (3.3) and the rear straight edge (3.34) is a2, the size of which is a2 = step distance - half the length of the second punch (1.22) = L - (L / 2+0.11) = L / 2 - 0.11; The upper straight edge (3.35) is formed on the third station (103), and the distance between the upper straight edge (3.35) and the center of the product (3.3) is b1, the size of which is b1 = half the length of the second die (2.12) = L / 2+0.15; The lower straight edge (3.36) is formed on the third station (103), and the distance between the center of the product (3.3) and the lower straight edge (3.36) is b2, the size of which is b2 = step distance - half the length of the second punch (1.22) = L - (L / 2+0.11) = L / 2-0.11.

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