Waste cutting-off structure of trimming die
By designing the punch, scrap cutter, first cutting cutter, and second cutting cutter in the edge trimming die, and utilizing the gap and the heightened piercing structure, the problem of iron filings accumulation was solved, thus improving the production quality and efficiency of parts.
Patent Information
- Application Number
- CN202423319624.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The iron filings generated during the cutting process of existing molds tend to accumulate on the scrap cutter, leading to surface quality problems of parts and loss of production efficiency.
Design a scrap cutting structure for a trimming die, including a punch, a scrap cutter, a first trimming cutter, and a second trimming cutter. By setting a first gap and a lifting and piercing structure, iron filings are prevented from accumulating on the scrap cutter, ensuring that the iron filings fall to the bottom of the scrap cutter in a timely manner.
This effectively prevents iron filings from accumulating on the scrap cutter, improves the production quality and efficiency of parts, and prevents quality problems such as unevenness on the surface of parts.
Smart Images
Figure CN223748343U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to a cutting-off structure, in particular to a trimming die waste cutting-off structure, and belongs to the die field.
BACKGROUND
[0002] During die working, iron filings are generated during trimming, which can cause part quality problems, and the resulting die stoppage and production efficiency loss has been the number one problem in the automatic production of automobile outer coverings. The trimming iron filings are usually concentrated at the trimming film waste knife position, and when the waste is cut off, the waste section is torn, and iron filings and iron powder are easily generated in the process.
[0003] The existing die adopts a traditional waste cutting-off structure, and because the trimming knife is in contact with the initial contact surface of the plate at the corner position, the plate on both sides of the cutting edge is pressed downward and torn during the piercing process, and the iron filings generated during the tearing process fall between the waste knife and the punch core. And the waste knife is in close contact with the punch core, causing the iron filings to accumulate around the cutting edge of the waste knife. With mass production, the iron filings will accumulate more and more. And because the die is for automatic production, the iron filings cannot be cleaned in time, and the iron filings are easily stuck on the parts and brought into the die cavity, causing surface quality problems such as concave-convex points on the subsequent production parts.
CONTENT OF THE INVENTION
[0004] The purpose of the present application is to provide a trimming die waste cutting-off structure to solve the technical problems in the prior art, which can effectively prevent iron filings from accumulating on the waste knife, thereby solving the problem of iron filings sticking to the parts and improving the production quality of the parts.
[0005] The application provides a trimming die waste cutting-off structure, which comprises a punch core and a waste knife, and further comprises a first trimming knife and a second trimming knife, the second trimming knife has a first trimming cutting edge and a second trimming cutting edge, the first trimming cutting edge and the second trimming cutting edge have an included angle therebetween, and the first trimming cutting edge cooperates with the cutting edge on the waste knife to cut off the waste; and a first gap is formed between the end surface of the waste knife and the surface of the punch core.
[0006] In the foregoing trimming die waste cutting-off structure, preferably, the top surface of the end of the cutting edge of the waste knife close to the punch core is formed with a flat surface, the flat surface is lower than the top surface of the edge of the punch core, and the length L1 of the flat surface is 15-20 mm.
[0007] In the foregoing trimming die waste cutting-off structure, preferably, the end of the cutting edge of the waste knife close to the punch core has a round corner with an R1.0.
[0008] In the foregoing trimming die waste cutting-off structure, preferably, the width of the cutting edge of the waste knife is W=5 mm.
[0009] In the foregoing trimming die waste cutting structure, preferably, the width W of the blade of the waste cutter gradually increases from 5 mm to 10 mm from one end to the other end of the punch core.
[0010] In the foregoing trimming die waste cutting structure, preferably, the thickness h1 of the blade of the waste cutter is 5 mm.
[0011] In the foregoing trimming die waste cutting structure, preferably, the corner position of the first trimming blade and the second trimming blade has a height protruding piercing structure.
[0012] In the foregoing trimming die waste cutting structure, preferably, the vertical distance h2 between the tip of the height protruding piercing structure and the blade top surface of the first trimming cutter is 7 mm.
[0013] In the foregoing trimming die waste cutting structure, preferably, the angle a1 between the corner edge of the first trimming blade and the second trimming blade and the top surface of the transition section on the second trimming blade is 75°, the length of the transition section on the second trimming blade is L2=25 mm; the angle a2 between the corner edge of the first trimming blade and the second trimming blade and the top surface of the transition section on the first trimming blade is 70°, and the length of the transition section on the first trimming blade is L3=15 mm.
[0014] In the foregoing trimming die waste cutting structure, preferably, the blade of the first trimming cutter has a relief section near one end of the second trimming cutter, the width W3 of the blade of the relief section is 5 mm, and the length L4 of the relief section is 25-30 mm.
[0015] Compared with the prior art, the present application comprises a punch core, a waste cutter, a first trimming cutter and a second trimming cutter, the second trimming cutter has a first trimming blade and a second trimming blade, the first trimming blade cooperates with the waste cutter to cut off the waste; and a first gap is formed between the end surface of the waste cutter and the surface of the punch core. Through the first gap, the iron filings generated during the waste cutting can fall to the bottom of the waste cutter 2, preventing the accumulation of iron filings between the waste cutter and the punch core, solving the problem that the iron filings can stick to the parts, thereby solving the problem of concave and convex points on the surface of the parts and improving the production quality of the parts. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0017] Figure 1is a structural schematic diagram of the present application;
[0018] Figure 2 is a partial structural schematic diagram of the upper die holder;
[0019] Figure 3 is a partial structural schematic diagram of the lower die holder;
[0020] Figure 4 is a position relation diagram of the scrap blade and the punch core in the top view direction;
[0021] Figure 5 is a position relation diagram of the scrap blade and the punch core in the side view direction;
[0022] Figure 6 is an axonometric view of the scrap blade;
[0023] Figure 7 is a schematic diagram of the connection position of the first trimming blade and the second trimming blade;
[0024] Figure 8 is a partial structural top view of the first trimming blade;
[0025] Figure 9 is a labeling diagram of the scrap blade and the second trimming blade;
[0026] Figure 10 is a clearance relation diagram of the first trimming blade and the scrap blade;
[0027] Figure 11 is a labeling diagram of the first trimming blade and the second trimming blade and the scrap blade.
[0028] Legend: punch core 1, scrap blade 2, first trimming blade 3, first trimming edge 4, second trimming edge 5, flat surface 6, pick-up piercing structure 7, upper die holder 8, lower die holder 9, scrap 10.
DETAILED DESCRIPTION
[0029] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for the purpose of explaining the present application, and cannot be interpreted as a limitation of the present application.
[0030] Embodiments of the present application: as Figures 1-4As shown, a trimming die waste cutting structure includes a punch core 1, a waste knife 2, a first trimming knife 3 and a second trimming knife, the second trimming knife has a first trimming edge 4 and a second trimming edge 5, and the first trimming edge 4 and the second trimming edge 5 have an included angle therebetween, the first trimming edge 4 cooperates with the edge on the waste knife 2 to cut off the waste 10; and the end surface of the waste knife 2 and the surface of the punch core 1 have a first gap therebetween.
[0031] In the embodiment, the punch core 1 and the waste knife 2 are fixedly installed on the lower die seat 9, the first trimming knife 3 and the second trimming knife are fixedly installed on the upper die seat 8, the included angle between the first trimming edge 4 and the second trimming edge 5 is set according to actual requirements, for example, it can be set to 70° or 80° or 90°, and the value d1 of the first gap is preferably 6 mm.
[0032] Through the setting of the first gap, the iron filings generated when the waste is cut off fall to the bottom of the waste knife 2, and will not accumulate on the waste knife 2, thereby preventing the iron filings from sticking to the part.
[0033] Specifically, please refer to Figure 5 and Figure 6 , the top surface of the end of the edge of the waste knife 2 close to the punch core 1 is formed with a flat surface 6, the flat surface 6 is lower than the top surface of the edge of the punch core 1, the gap d2 between the flat surface 6 and the top surface of the edge of the punch core 1 in the height direction is 3 mm, the length L1 of the flat surface 6 is 15-20 mm, and is preferably 16 mm.
[0034] Further, the end of the edge of the waste knife 2 close to the punch core 1 has a round corner with a radius of R1.0. The width W of the end of the edge of the waste knife 2 close to the punch core 1 is 5 mm, and gradually increases to 10 mm from the end to the other end. The thickness h1 of the edge of the waste knife 2 is 5 mm. Through the structural design of the waste knife 2, the discharge is more convenient.
[0035] Further, please refer to Figure 7 and Figure 8 , the corner position of the first trimming edge 4 and the second trimming edge 5 has a protruding high-piercing structure 7 in the height direction. The vertical distance h2 between the tip point of the high-piercing structure 7 and the top surface of the edge on the first trimming knife 3 is 7 mm.
[0036] The included angle a1 between the corner edge of the first trimming edge 4 and the second trimming edge 5 and the top surface of the transition section on the second trimming edge 5 is 75°, and the length L2 of the transition section on the second trimming edge 5 is 25 mm. The included angle a2 between the corner edge of the first trimming edge 4 and the second trimming edge 5 and the top surface of the transition section on the first trimming edge 4 is 70°, and the length L3 of the transition section on the first trimming edge 4 is 15 mm. Through the structural design, the strength of the high-piercing structure 7 can be ensured.
[0037] The cutting edge of the first trimming cutter 3 is formed with a relief section near one end of the second trimming cutter, the cutting edge width W3 of the relief section is 5mm, and the length L4 of the relief section is 25-30mm. Through the structural design, the deformation of the waste material caused by the first trimming cutter 3 can be avoided.
[0038] Furthermore, the front end of the waste cutter 2 in the embodiment is not designed to match the shape of the part, please refer to Figure 9 、 Figure 10 and Figure 11 , so that the front end of the second trimming cutter and the waste cutter 2 have an engagement amount h3 of 4mm. In the height direction, the gap d3 between the first trimming cutter 3 and the waste cutter 2 is 3mm. Except for the sharp point area of the pick-up piercing structure 7, the overall blade engagement amount h4 of the second trimming cutter and the first trimming cutter 3 is 4mm.
[0039] The working principle of the application is as follows: when the upper and lower molds are closed, the second trimming cutter first contacts the waste material. Since the pick-up piercing structure 7 is designed at the corner position of the second trimming cutter, the initial contact position with the waste material is a sharp point, which greatly reduces the initial contact area compared with the traditional structure, greatly reduces the phenomenon of waste material being squeezed and torn on both sides of the cutting edge, the cutting edge cross section is more flat, and the probability of iron filings is greatly reduced. Through the piercing function of the second trimming cutter, the waste material at the corner position is cut off. Then the first trimming cutter 3 contacts the waste material to separate the waste material from the core pin 1 as a whole. As the mold continues to run downward, the first trimming cutter 4 of the second trimming cutter contacts the waste cutter 2 to finally complete the cutting of the waste material. In addition, since the front end of the waste cutter 2 has a gap of 6mm with the core pin 1, the iron filings generated during the trimming process can fall to the bottom of the waste cutter 2 in time, avoiding the accumulation of iron filings near the cutting edge. The cutting edge on the first trimming cutter 3 has a relief section, which can prevent the waste material from being hooked on the waste cutter 2, effectively reducing the risk of waste material jamming.
[0040] The above embodiments shown in the drawings explain the structure, features and effects of the application in detail. The above description is only the preferred embodiment of the application, but the application is not limited by the drawings. Any changes or modifications made in accordance with the concept of the application, or equivalent embodiments with equivalent changes, shall be within the scope of the application.
Claims
1. A trimming die waste cutting structure comprising a male die core (1) and a waste knife (2), characterized in that: The first trimming cutter (3) and the second trimming cutter are also included, the second trimming cutter has a first trimming edge (4) and a second trimming edge (5), the first trimming edge (4) and the second trimming edge (5) have an included angle, the first trimming edge (4) cooperates with the edge on the scrap cutter (2) to cut off the scrap (10); the end vertical surface of the scrap cutter (2) and the vertical surface of the punch core (1) have a first gap.
2. The trim die waste cutoff structure of claim 1, wherein: The edge of the scrap cutter (2) is formed with a flat surface (6) near the top surface of one end of the punch core (1), the flat surface (6) is lower than the top surface at the edge of the punch core (1), the length L1 of the flat surface (6) is 15-20mm.
3. The trim die waste cutoff structure of claim 2, wherein: The edge of the scrap cutter (2) has a round corner of R1.0 near one end of the punch core (1).
4. The trim die waste cutoff structure of claim 3, wherein: The edge width of the scrap cutter (2) is W=5mm.
5. The trim die waste cutoff structure of claim 4, wherein: From one end to the other end near the punch core (1), the edge width W of the scrap cutter (2) gradually increases from 5mm to 10mm.
6. The trim die waste cutoff structure of claim 5, wherein: The thickness h1 of the edge of the scrap cutter (2) is 5mm.
7. The trim die scrap break structure of Claim 1 wherein: The corner position of the first trimming edge (4) and the second trimming edge (5) has a height direction protruding kick-piercing structure (7).
8. The trim die waste cutoff structure of claim 7, wherein: The vertical distance h2 between the tip of the kick-piercing structure (7) and the edge top surface of the first trimming cutter (3) is 7mm.
9. The trim die waste cutoff structure of claim 8, wherein: The corner edge of the first trimming edge (4) and the second trimming edge (5) and the transition section top surface of the second trimming edge (5) have an included angle a1=75°, the length of the transition section on the second trimming edge (5) is L2=25mm; the corner edge of the first trimming edge (4) and the first trimming edge (4) and the transition section top surface of the second trimming edge (5) have an included angle a2=70°, the length of the transition section on the first trimming edge (4) is L3=15mm.
10. The trim die scrap severing arrangement of claim 1 wherein: The edge of the first trimming cutter (3) near one end of the second trimming cutter is formed with a relief section, the edge width W3 of the relief section is 5mm, and the length L4 of the relief section is 25-30mm.