Cutting die for cutting material belt

Abstract

The cutting die comprises a top plate and a bottom plate which are detachably connected, a punching through hole matched with a to-be-punched shape is formed in the top plate, a circle of cutting edge is arranged on the periphery of the punching through hole, and the side face, close to the punching through hole, of the cutting edge is a vertical face perpendicular to the upper end face of the top plate. The side face, away from the punching through hole, of the cutting edge is an inclined face inclined relative to the upper end face of the top plate, the included angle between the vertical face and the inclined face is alpha, and the range of alpha is 25-35 degrees. The material belt punching device has the advantages that the material belt punching cost is reduced, and the quality of punched products is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of knife dies, in particular to a knife die for cutting material strips used in a die-cutting machine. Background Art

[0002] At present, the punching of the material strip is done by metal die punching or knife carving, such as Figure 1 As shown, the side section of the engraving blade 1' is in the shape of an inverted isosceles triangle. After the material strip 2' is punched, as shown in FIG. Figure 2 , Figure 3 As shown, both sides of the punched section of the strip have curled strips 2a', which makes the product punched out of the strip uneven, and then affects the quality of the product after punching. Some use hardware die punching, using the cooperation of the upper die knife 1" and the lower die knife 2" to punch the strip 3". The product punched out by this method does not have curled edges, but the cost of the hardware die is relatively expensive. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings, the purpose of the utility model is to provide a cutting die for cutting a material strip, which can reduce the cost of punching a material strip and ensure the quality of the product after punching.

[0004] In order to achieve the above purpose, one of the technical solutions adopted by the utility model is: a cutting die for cutting a material strip, comprising a top plate and a bottom plate that are detachably connected, the top plate is provided with a punching hole matching the shape to be punched, a circle of blades is provided around the punching hole, the side of the blade close to the punching hole is a vertical surface perpendicular to the upper end surface of the top plate, the side of the blade away from the punching hole is an inclined surface inclined to the upper end surface of the top plate, the angle between the vertical surface and the inclined surface is α, and the range of α is 25°~35°.

[0005] The beneficial effect of the knife die for cutting material strips of the utility model is that the original inverted isosceles triangle blade structure is changed to a vertical surface on one side and an inclined surface on the other side, and the blade is formed at the angle formed by the vertical surface and the inclined surface to cut the material strips. Since the cut product contacts the vertical surface, no curling will be generated, and the material strips after cutting are waste materials. Even if curling is formed on the material strips, it does not affect the cutting quality after cutting. Compared with stamping hardware molds, the cost is 1 / 10 of that of hardware molds. Therefore, after adopting this technical solution, the cost of punching the material strips is reduced and the quality of the products after punching is guaranteed.

[0006] Preferably, the angle α is 30°, which is the best cutting angle.

[0007] Preferably, a floating block is arranged between the top plate and the bottom plate, the floating block matches the shape of the punching hole and can move up and down in the punching hole, a floating block limiting structure is arranged between the lower end of the floating block and the lower end of the punching hole, and an elastic member is arranged between the floating block and the bottom plate, the elastic member forces the floating block to be higher than the blade. The matching arrangement of the floating block and the elastic member can eject the cut product from the material belt.

[0008] Preferably, the floating block limiting structure comprises: a circle of flanges integrally formed at the lower end of the floating block; a circle of grooves arranged at the lower end of the punched through hole, the shapes of the circle of grooves and the circle of flanges match each other, and the depth of the grooves is greater than the thickness of the flanges. The matching of the flanges and the grooves has a simple structure and reliable limiting.

[0009] Preferably, an elastic member limiting groove is provided between the floating block and the base plate, and the elastic member limiting groove is provided at the bottom of the floating block, or at the top of the base plate, or at the bottom of the floating block and at the top of the base plate, and the elastic member is located in the elastic member limiting groove, and the elastic member limiting groove is used to provide installation space for the elastic member.

[0010] Preferably, the elastic member is a spring, at least one of which is provided, and an elastic member fixing column is provided in the elastic member limiting groove to provide guidance for the spring as the elastic member to ensure the stability of the spring compression and release of the elastic force.

[0011] Preferably, when the elastic member limiting grooves are arranged at the bottom of the floating block and the top of the bottom plate, the elastic member fixing column in the bottom of the floating block is lower than the corresponding elastic member limiting groove, and the elastic member fixing column at the top of the bottom plate is lower than the corresponding elastic member limiting groove, that is, there is a gap between the two groups of elastic member fixing columns.

[0012] Preferably, when the elastic member limiting groove is arranged at the bottom of the floating block or at the top of the bottom plate, the elastic member fixing column in the bottom of the floating block extends into the elastic member limiting groove at the top of the bottom plate; the elastic member fixing column at the top of the bottom plate extends into the elastic member limiting groove at the bottom of the floating block, so as to improve the stability of the spring installation.

[0013] Preferably, a positioning pin is fixedly provided on the upper surface of the top plate to play a positioning role with other machined parts.

[0014] Preferably, the inclined surface is formed by carving; and the vertical surface is formed by wire cutting, so as to ensure that the desired blade shape can be formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of cutting the material strip with a blade in the prior art;

[0016] Figure 2It is a schematic diagram of the structure after the material strip is cut by a blade in the prior art;

[0017] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0018] Figure 4 It is a schematic diagram of the structure of punching a material strip using a hardware die in the prior art;

[0019] Figure 5 is a three-dimensional diagram of this embodiment;

[0020] Figure 6 It is the front view of this embodiment;

[0021] Figure 7 is a side view of this embodiment;

[0022] Figure 8 for Figure 7 Sectional view at the middle BB;

[0023] Fig. 9 is a three-dimensional diagram of the top plate of this embodiment;

[0024] Fig.10 is a three-dimensional view of the top plate of this embodiment at a first angle;

[0025] Fig.11 is a side view of the top plate of this embodiment;

[0026] Fig.12 for Fig.11 A partial enlarged view of the CC in the middle;

[0027] Fig.13 is a three-dimensional view of the top plate of this embodiment at a second angle;

[0028] Fig.14 is a three-dimensional diagram of the floating block of this embodiment at a first angle;

[0029] Fig.15 is a three-dimensional diagram of the floating block of this embodiment at a second angle;

[0030] Fig.16 3D is a three-dimensional diagram of the base plate of this embodiment.

[0031] The accompanying drawings are the reference numerals of this embodiment:

[0032] 1. Top plate; 1a. Punched through hole; 1b. Groove; 2. Bottom plate; 3. Blade; 3a. Vertical surface; 3b. Inclined surface; 4. Floating block; 4a. Flange; 5. Elastic member; 6. Elastic member limiting groove; 7. Elastic member fixing column; 8. Positioning pin. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0034] See also Figure 5-Figure 7 As shown, the present embodiment discloses a cutting die for cutting a material strip, comprising a detachably connected top plate 1 and a bottom plate 2, the top plate 1 being provided with a punching hole 1a matching the shape to be punched, a positioning pin 8 being fixedly provided on the upper end surface of the top plate 1, a circle of blades 3 being provided around the punching hole 1a, the side of the blade 3 close to the punching hole 1a being a vertical surface 3a perpendicular to the upper end surface of the top plate 1, the side of the blade 3 away from the punching hole 1a being an inclined surface 3b inclined to the upper end surface of the top plate 1, wherein the inclined surface 3b is formed by engraving, and the vertical surface 3a is formed by wire cutting; the angle between the vertical surface 3a and the inclined surface 3b is α, the range of α is 25° to 35°, and α in the present embodiment is 30°, and the vertical surface 3a is used to cut the product from the material strip without causing curling, thereby ensuring the quality of the punched product.

[0035] like Figure 5 , Figure 8 , Fig.14 , Fig.15 As shown, a floating block 4 is arranged between the top plate 1 and the bottom plate 2. The floating block 4 matches the shape of the punching hole 1a and can move up and down in the punching hole 1a. A floating block 4 limiting structure is arranged between the lower end of the floating block 4 and the lower end of the punching hole 1a. An elastic member 5 is arranged between the floating block 4 and the bottom plate 2. The elastic member 5 forces the floating block 4 to be higher than the blade 3.

[0036] like Figure 8-Figure 13 As shown, the limiting structure of the floating block 4 includes:

[0037] A flange 4a integrally formed at the lower end of the floating block 4;

[0038] A circle of grooves 1b is provided at the lower end of the punched through hole 1a, and the shapes of the circle of grooves 1b and the circle of flanges 4a match each other, and the depth of the grooves 1b is greater than the thickness of the flanges 4a.

[0039] An elastic member limiting groove 6 is provided between the floating block 4 and the bottom plate 2. The elastic member limiting groove 6 is provided at the bottom of the floating block 4, or at the top of the bottom plate 2, or at the bottom of the floating block 4 and at the top of the bottom plate 2. The elastic member 5 is located in the elastic member limiting groove 6. The elastic member 5 is a spring, and five springs are provided in this embodiment. Five elastic member fixing columns 7 are provided in the elastic member limiting groove 6.

[0040] In some embodiments, the elastic member limiting groove 6 is set at the bottom of the floating block 4 and the top of the base plate 2, the elastic member fixing column 7 in the bottom of the floating block 4 is lower than the corresponding elastic member limiting groove 6, and the elastic member fixing column 7 at the top of the base plate 2 is lower than the corresponding elastic member limiting groove 6.

[0041] In other embodiments, the elastic member limiting groove 6 is disposed at the bottom of the floating block 4, and the elastic member fixing column 7 in the bottom of the floating block 4 extends into the elastic member limiting groove 6 at the top of the bottom plate 2;

[0042] In other embodiments, the elastic member limiting groove 6 is arranged at the top of the bottom plate 2 , and the elastic member fixing column 7 at the top of the bottom plate 2 extends into the elastic member limiting groove 6 at the bottom of the floating block 4 .

[0043] This implementation works like this:

[0044] The cutting die for cutting the material strip is installed on the driving source, with the blade 3 facing downward toward the material strip, and a punching block matching the shape of the punching hole 1a is provided below the part to be cut on the other side of the material strip. When the driving source drives the cutting die for cutting the material strip to move toward the material strip, the product on the material strip is cut through the cooperation of the blade 3 and the punching block; at this time, the punching block forces the floating block 4 to move toward the bottom plate 2, and the spring is in a compressed state. When the driving source drives the cutting die for cutting the material strip to reset (i.e., away from the material strip), the spring resets and pushes the cut product out of the material strip.

[0045] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A cutting die for cutting a material strip, comprising a detachably connected top plate (1) and a bottom plate (2), characterized in that: The top plate (1) is provided with a punching hole (1a) matching the shape to be punched, and a circle of blades (3) are provided around the punching hole (1a), the side of the blade (3) close to the punching hole (1a) is a vertical surface (3a) perpendicular to the upper end surface of the top plate (1), and the side of the blade (3) away from the punching hole (1a) is an inclined surface (3b) inclined to the upper end surface of the top plate (1), and the angle between the vertical surface (3a) and the inclined surface (3b) is α, and the range of α is 25°~35°.

2. The cutting die for cutting the material strip according to claim 1, characterized in that: The α is 30°.

3. The cutting die for cutting the material strip according to claim 1, characterized in that: A floating block (4) is arranged between the top plate (1) and the bottom plate (2); the floating block (4) matches the shape of the punching hole (1a) and can move up and down in the punching hole (1a); a floating block (4) limiting structure is arranged between the lower end of the floating block (4) and the lower end of the punching hole (1a); an elastic member (5) is arranged between the floating block (4) and the bottom plate (2); the elastic member (5) forces the floating block (4) to be higher than the blade (3).

4. The cutting die for cutting the material strip according to claim 3, characterized in that: The floating block (4) limiting structure comprises: A flange (4a) integrally formed at the lower end of the floating block (4); A circle of grooves (1b) is provided at the lower end of the punched through hole (1a), the shape of the circle of grooves (1b) and the shape of the circle of flanges (4a) matching each other, and the depth of the grooves (1b) is greater than the thickness of the flanges (4a).

5. The cutting die for cutting the material strip according to claim 3, characterized in that: An elastic member limiting groove (6) is provided between the floating block (4) and the bottom plate (2); the elastic member limiting groove (6) is provided at the bottom of the floating block (4), or at the top of the bottom plate (2), or at the bottom of the floating block (4) and at the top of the bottom plate (2); and the elastic member (5) is located in the elastic member limiting groove (6).

6. The cutting die for cutting the material strip according to claim 5, characterized in that: The elastic member (5) is a spring, at least one of which is provided, and an elastic member fixing column (7) is provided in the elastic member limiting groove (6).

7. The cutting die for cutting the material strip according to claim 6, characterized in that: When the elastic member limiting groove (6) is arranged at the bottom of the floating block (4) and the top of the bottom plate (2), the elastic member fixing column (7) in the bottom of the floating block (4) is lower than the elastic member limiting groove (6) corresponding thereto, and the elastic member fixing column (7) at the top of the bottom plate (2) is lower than the elastic member limiting groove (6) corresponding thereto.

8. The cutting die for cutting a material strip according to claim 6, characterized in that: When the elastic member limiting groove (6) is arranged at the bottom of the floating block (4) or the top of the bottom plate (2), the elastic member fixing column (7) in the bottom of the floating block (4) extends into the elastic member limiting groove (6) at the top of the bottom plate (2); the elastic member fixing column (7) at the top of the bottom plate (2) extends into the elastic member limiting groove (6) at the bottom of the floating block (4).

9. The cutting die for cutting a material strip according to claim 1, characterized in that: A positioning pin (8) is fixedly provided on the upper end surface of the top plate (1).

10. The cutting die for cutting a material strip according to claim 1, characterized in that: The inclined surface (3b) is formed by engraving; and the vertical surface (3a) is formed by wire cutting.

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