CN221936977U - Male knife edge of punching die and punching die - Google Patents

Abstract

The utility model relates to the technical field of molds, and in particular to a punching mold male blade and a punching mold. The male blade comprises an outer wall and a blade, the end of the outer wall intersects with the blade at a first boundary, and a plurality of arc grooves are arranged at intervals along the first boundary, each arc groove is located on the blade surface, and the groove edge and the first boundary have a common section. Compared with the prior art, the utility model has the advantages of greatly shortening the punching time, improving the production cycle, reducing the production cost, and effectively extending the service life of the blade.

Description

A punching die male blade and punching die

Technical Field

The utility model relates to the technical field of molds, in particular to a punching mold male blade and a punching mold.

Background Art

Fabric automotive interior parts are widely used in automotive interior parts due to their environmental protection, sound insulation and low cost. There are three production processes for such parts. First, forming mold forming + foaming mold foaming sound-absorbing material + punching mold punching corners; second, forming mold forming + punching mold punching corners; third, forming mold forming and punching mold forming and punching. These three production processes are inseparable from punching molds. The market competition is fierce. Under the premise of the same quality, cost determines the market share of each OEM and its supporting factories. The transparency of raw material prices forces cost control to become the primary task of each OEM and its supporting factories. Productivity is low cost, and the production rhythm of batch parts directly depends on the quality and life of the mold.

The blade style of traditional punching dies is mostly designed with a conformal design. The conformal blade includes a female conformal concave blade and a male conformal convex blade. Figure 1 shows the front view of the conformal blade structure and the pinch line state of the male and female blades in the conformal design. It can be seen that the blade of the conformal male blade is flat. The working principle of the male and female blades is that the male convex blade is inserted into the female concave blade to a certain depth under the action of the press to complete the punching of the parts. However, the conformal blade reduces the blade pressure and increases the punching resistance, that is, it reduces the destructive force on the cut object and increases the tearing of the material during the punching process, making the blade easy to collapse, short life, long punching time, and poor punching edge quality. Therefore, the disadvantages of this type of blade are easy to collapse, high maintenance frequency, low production efficiency, and general appearance quality of the product after punching. Therefore, how to improve the production efficiency of automotive interior parts while ensuring the appearance quality of the product after punching has become a problem that needs to be solved in this field.

Utility Model Content

The utility model aims to provide a punching die male blade and a punching die in order to overcome the defects of the prior art, such as long punching time, low production efficiency and average appearance quality of punched products.

The purpose of the utility model can be achieved through the following technical solutions:

According to the first aspect of the utility model, a male cutting edge of a punching die is provided, the male cutting edge comprising an outer wall and a blade, the end of the outer wall intersecting with the blade at a first boundary line, a plurality of arcuate grooves are arranged at intervals along the first boundary line, each of the arcuate grooves is located on the blade surface, and the groove edge has a common section with the first boundary line.

As a preferred technical solution, each of the arc-shaped grooves includes a first concave surface and a second concave surface, the first concave surface intersects with the blade surface at a second boundary, the second concave surface intersects with the first concave surface at a third boundary and intersects with the blade at a fourth boundary, the third boundary is located in the area enclosed by the second boundary and the fourth boundary, and the endpoints of the second boundary, the endpoints of the third boundary and the fourth boundary are all located on the common section.

As a preferred technical solution, the common section includes a first part and a second part, the first part is the overlapping section of the second boundary and the first boundary, the second part is the overlapping section of the fourth boundary and the first boundary, and the steepness of the first part is less than the steepness of the second part.

As a preferred technical solution, the vertical distance from the highest intersection point of each arc-shaped groove with the first boundary line to the horizontal plane where the lowest point of the corresponding arc-shaped groove is located is at least 1 mm and at most 3 mm.

As a preferred technical solution, a plurality of the arc-shaped grooves are opened at equal intervals.

As a preferred technical solution, the outer wall is conformal.

As a preferred technical solution, the working depth of the male blade is 2.5 to 5 mm.

As a preferred technical solution, the male blade includes a first arcuate groove, a second arcuate groove, a third arcuate groove and a fourth arcuate groove, the first arcuate groove and the second arcuate groove are symmetrically arranged, and the third arcuate groove and the fourth arcuate groove are symmetrically arranged.

According to the second aspect of the utility model, a punching die is provided, comprising an upper die and a lower die, wherein the upper die comprises the male blade, and the lower die comprises a conformable female blade, wherein the position of the male blade in the upper die corresponds one-to-one to the position of the conformable female blade in the lower die, and the male blade and the conformable female blade are clearance-matched.

As a preferred technical solution, the punching die includes a blanking groove, and the conformal female blade is connected to the blanking groove.

Compared with the prior art, the utility model has the following beneficial effects:

1. The utility model provides a new type of punching die male blade, along the boundary line between the outer wall end of the blade and the blade, a plurality of arc grooves are arranged on the blade surface at intervals, and a part of the groove edge of the groove coincides with the boundary line. The overall structure of the male blade is similar to teeth. When the male blade is observed from a direction perpendicular to the blade opening direction, the edge of the male blade is convex and concave, which can also be called a wavy male blade, which increases the bite shearing ability of the die blade, enables the tool to form point contact with the cut material, thereby increasing the blade pressure, reducing the punching resistance, greatly shortening the punching time, improving the production cycle, effectively extending the service life of the blade, improving the production efficiency of automotive interior parts, and helping to reduce production costs;

2. The utility model adopts a wave-shaped male blade edge, which forms a protrusion while opening a groove. The blade part between adjacent arc-shaped grooves is the protrusion. The protrusion can ensure the realization of point contact, effectively improve the destructive power of the tool on the cut material, reduce the tearing of the material during the punching process, help improve the punching edge quality of the material, and obtain a product with better appearance quality.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the traditional male and female blade structure and kneading diagram;

FIG2 is a schematic structural diagram of a wavy male blade in Embodiment 1 of the present utility model;

FIG3 is a top view of the wavy male blade in Example 1 of the utility model;

FIG4 is a front view of the wavy male blade in Example 1 of the utility model;

FIG5 is a cross-sectional view of the punching die in Example 2 of the present utility model;

FIG6 is a bottom view of the punching die in Example 2 of the utility model;

7 is a schematic diagram of the structure of the matching of the wavy male blade and the shaped female blade in Example 2 of the utility model;

Among them: 1. Conformal outer wall; 2. Blade; 31. First boundary line; 32. Second boundary line; 33. Third boundary line; 34. Fourth boundary line; 41. First concave surface; 42. Second concave surface; 5. Upper mold; 6. Lower mold; 7. Wave-like male blade; 8. Conformal female blade; 9. Blanking trough for scraps.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

Example 1

As shown in FIG2 , this embodiment provides a punching die male blade. The male blade includes a conformal outer wall 1 and a blade 2, wherein the end of the conformal outer wall 1 intersects with the blade 2 at a first boundary line 31, and a plurality of arc-shaped grooves are provided at intervals along the first boundary line 31, each arc-shaped groove is located on the blade surface of the blade 2, and the groove edge has a common section with the first boundary line 31.

FIG3 is a top view of the male blade. The first boundary line 31 of the male blade is a closed curve. The first boundary line 31 can be divided into an upper half, a lower half, a left half and a right half in the top view. Four first arc grooves, four second arc grooves, one third arc groove and one fourth arc groove are provided on the blade surface along the first boundary line 31. The first arc grooves and the second arc grooves are symmetrically arranged one by one, and the third arc grooves and the fourth arc grooves are symmetrically arranged. Specifically, the four first arc grooves are sequentially opened in the upper half of the first boundary line 31 from left to right, and correspondingly, the four second arc grooves are sequentially opened in the lower half of the first boundary line 31 from left to right; the third arc groove is opened in the left half of the first boundary line 31, and correspondingly, the fourth arc groove is opened in the right half of the first boundary line 31. In other embodiments, the number of arc grooves in each part can be more, as long as it can be applied to the size specifications of the corresponding punching mold.

For one of the arc-shaped grooves, the arc-shaped groove includes a first concave surface 41 and a second concave surface 42. The first concave surface 41 intersects with the blade surface at the second boundary line 32 (A-C-D-B). The second concave surface 42 intersects with the first concave surface 41 at the third boundary line 33 (A-O-B) and intersects with the blade at the fourth boundary line 34 (A-B). The third boundary line 33 is located in the area surrounded by the second boundary line 32 and the fourth boundary line 34. The endpoints of the second boundary line 32, the endpoints of the third boundary line 33 and the fourth boundary line 34 are all located on a common section. The two endpoints of the second boundary line 32, the two endpoints of the third boundary line 33 and the two endpoints of the fourth boundary line 34 intersect at point A and point B respectively. The common section between the groove edge and the first boundary line 31 is the irregular line segment C-A-B-D. The irregular line segment C-A-B-D includes a first part and a second part. The first part is the overlapping section of the second boundary 32 and the first boundary 31, that is, the line segment AC and the line segment BD; the second part is the overlapping section of the fourth boundary 34 and the first boundary 31, that is, the line segment AB. Combining Figures 2 and 3, it can be seen that the steepness of the first part is less than the steepness of the second part, that is, the steepness of the line segment AC and the line segment BD is less than the steepness of the line segment AB. In practical applications, the steepness of both parts is adjustable in order to better match the shape of the workpiece to be processed, so as to further improve the processing efficiency and product quality. In addition, the first concave surface 41 has 4 intersections and 2 overlapping sections with the first boundary 31. Among them, the highest intersection of the first concave surface 41 and the first boundary 31 is point C. The vertical distance from point C to the horizontal plane where the lowest point of the arc groove is located is at least 1mm and at most 3mm. Figure 4 shows the blade structure observed from a side direction perpendicular to the blade opening direction. From this perspective, the edge of the male blade is undulating, so the male blade structure provided in this embodiment can also be called a wavy male blade, and therefore it can also be considered that the amplitude w of the wave top and the wave trough is between 1mm and 3mm.

In some other embodiments, the working depth d of the male blade is between 2.5 mm and 5 mm.

In some other embodiments, a plurality of arc-shaped grooves are opened along the first boundary line 31 at equal intervals.

Example 2

As shown in Fig. 5, this embodiment provides a punching die, including an upper die 5 and a lower die 6. Fig. 6 is a view of the punching die observed from the side where the lower die 6 is located, that is, a bottom view, and Fig. 5 is a cross-sectional view of the die taken along the plane where PP in Fig. 6 is located, so in Fig. 5, the upper die 5 is at the bottom and the lower die 6 is at the top.

As can be seen from Figure 6, the upper mold 5 includes a plurality of wavy male blades, and the lower mold 6 includes a corresponding number of free-form female blades. The position of the wavy male blade in the upper mold 5 corresponds to the position of the free-form female blade in the lower mold 6, and each pair of wavy male blades and free-form female blades are clearance-matched. Therefore, the top view structure of the wavy male blade at the corresponding position can be seen through the opening area of each free-form female blade. Combining Figures 5 and 6, it can be seen that all male blades in the lower mold 6 that may come into contact with the to-be-processed blade can be set to a wavy male blade structure. Figure 6 shows a partial enlarged view of one pair of male and female blades after kneading.

Take one pair of wavy male blade 7 and conformal female blade 8 as an example, as shown in Figure 7. The wavy male blade 7 is a convex blade, the conformal female blade 8 is a concave blade, and the lower mold 6 also includes a scrap blanking groove 9, and the conformal female blade 8 is connected to the scrap blanking groove 9.

The working principle of the aforementioned punching die is as follows: the wavy male blade is inserted into the conformal female blade to a certain depth under the action of the press to complete the punching of the parts.

The convex structure of the wave-shaped male blade is similar to teeth, which increases the bite shearing ability of the mold blade. The principle is: the wave-shaped male blade increases the pressure of the punching process, that is, the destructive force on the material, that is, the shearing force effect. Under the same press pressure, it can quickly pierce the felt blank material of the fabric to complete the punching. It is faster than the piercing of the free-form male blade to pierce the felt or semi-finished product, and the piercing time is shorter. In the punching process, the difference between the wave-shaped male blade and the free-form male blade is:

(1) The wave-shaped male blade contacts the material at a point, which increases the blade pressure and can improve the destructive force on the object being cut. The conformal male blade contacts the material at the same time in a linear manner, which reduces the blade pressure, that is, reduces the destructive force on the object being cut.

(2) The wavy male blade reduces the punching resistance and reduces the tearing of materials during the punching process, making the blade life longer and the punching time shorter, which can effectively improve the production efficiency and the quality of the punching edge, making the product appearance quality better. However, the free-form male blade increases the punching resistance and increases the tearing of materials during the punching process, making the blade easy to break, short life, and long punching time, resulting in low production efficiency and poor punching edge quality, that is, average appearance quality.

Therefore, under the same press pressure, the wave-shaped male blade has more advantages than the conformal male blade. In addition, the press force required for the wave-shaped male blade is less than the pressure required for the conformal male blade.

The wavy male blade provided in this embodiment can be applied to edge punching dies for fabric parts such as automobiles, motorcycles, electric two-wheelers, electric tricycles, and airplanes, and has good market prospects. Putting the punching dies using the wavy male blade into production applications can fully meet the high-beat production rhythm, effectively improve production efficiency, and control production labor costs.

The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims (10)

1. A male cutting edge of a punching die, characterized in that the male cutting edge comprises an outer wall and a blade, the end of the outer wall intersects with the blade at a first boundary line, a plurality of arc-shaped grooves are arranged at intervals along the first boundary line, each of the arc-shaped grooves is located on the blade surface, and the groove edge has a common section with the first boundary line. 2. The male blade of the punching die according to claim 1 is characterized in that each of the arc-shaped grooves includes a first concave surface and a second concave surface, the first concave surface intersects with the blade surface at a second boundary, the second concave surface intersects with the first concave surface at a third boundary and intersects with the blade at a fourth boundary, the third boundary is located in the area enclosed by the second boundary and the fourth boundary, and the endpoints of the second boundary, the endpoints of the third boundary and the fourth boundary are all located on the common section. 3. The male blade of the punching die according to claim 2 is characterized in that the common section includes a first part and a second part, the first part is the overlapping section of the second boundary line and the first boundary line, the second part is the overlapping section of the fourth boundary line and the first boundary line, and the steepness of the first part is less than the steepness of the second part. 4. The male blade of the punching die according to claim 1 is characterized in that the vertical distance from the highest intersection of each of the arc-shaped grooves with the first boundary line to the horizontal plane where the lowest point of the corresponding arc-shaped groove is located is at least 1 mm and at most 3 mm. 5. The male blade of the punching die according to claim 1 is characterized in that a plurality of the arc-shaped grooves are arranged at equal intervals. 6. The male blade of the punching die according to claim 1, characterized in that the outer wall is conformal. 7. The male blade of the punching die according to claim 1, characterized in that the working depth of the male blade is 2.5 to 5 mm. 8. The male blade of the punching die according to claim 1 is characterized in that the male blade includes a first arc-shaped groove, a second arc-shaped groove, a third arc-shaped groove and a fourth arc-shaped groove, the first arc-shaped groove and the second arc-shaped groove are symmetrically arranged, and the third arc-shaped groove and the fourth arc-shaped groove are symmetrically arranged. 9. A punching die, comprising an upper die and a lower die, characterized in that the upper die comprises a male blade as described in any one of claims 1 to 8, and the lower die comprises a conformable female blade, the position of the male blade in the upper die corresponds one-to-one to the position of the conformable female blade in the lower die, and the male blade and the conformable female blade are clearance-matched. 10 . The punching die according to claim 9 , wherein the punching die comprises a blanking groove, and the conformal female blade is connected to the blanking groove.