Chromium-aluminum nitride hexagonal opposite-side screw die
By designing a chromium nitride aluminum hexagonal screw die, the problems of short service life and high friction coefficient of internal hexagonal punch dies were solved, achieving wear resistance and thermal resistance of the die, improving stamping efficiency and product quality, and reducing production costs.
Patent Information
- Application Number
- CN202422995736.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing internal hexagonal punches have short service life, are prone to breakage, have poor surface roughness, and a high coefficient of friction, resulting in difficulty in controlling product quality and high production costs. Lubricating grease needs to be applied to reduce friction.
The mold for hexagonal screws with chromium nitride aluminum is made of M42 high-cobalt toughness high-speed steel through one-piece cutting and die casting. The outer wall of the internal hexagonal punch and the top of the punch rod are coated with chromium nitride aluminum. The included angle is designed to be 3 degrees, the transition end is a round boss, and the stamping end is a cone to reduce friction and wear.
It improves the structural strength and service life of the mold, reduces the coefficient of friction, reduces wear, improves stamping efficiency and product quality, and reduces production costs.
Smart Images
Figure CN223506061U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining technology, specifically to a chromium nitride aluminum hexagonal screw mold. Background Technology
[0002] Socket head cap screws are common fasteners. A socket head cap punch die is a mold assembly used to machine hexagonal holes in metal materials. It is widely used in machining and assembly. Cylindrical head socket head cap screws are mainly formed by cold heading, and their hexagonal head shape is generally formed by stamping with a single socket head cap die. During the stamping process, to successfully obtain the product, the die must withstand significant stamping force, leading to defects in the die due to factors such as materials, coatings, and processing techniques during actual use.
[0003] Currently, existing internal hexagonal punch dies have a short service life and are prone to breakage, which makes it difficult to control product quality. Due to the poor surface roughness of the die itself, it is also difficult to improve the appearance quality of the product. Some punches have a high coefficient of friction and are easy to wear, which increases production costs. In addition, grease needs to be applied during stamping to reduce the coefficient of friction.
[0004] Based on this, this utility model designs a hexagonal screw mold for aluminum chromium nitride to solve the above problems. Utility Model Content
[0005] The purpose of this utility model is to provide a chromium nitride aluminum hexagonal screw mold to solve the problems mentioned in the background art, such as the short service life of existing internal hexagonal punches, easy breakage, difficulty in controlling product quality, poor surface roughness of the mold itself, difficulty in improving the surface quality of the product, high friction coefficient of some punches, easy wear, increased production costs, and the need to apply grease to reduce the friction coefficient during stamping.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a chromium aluminum nitride hexagonal screw mold, comprising a punch rod, wherein an internal hexagonal punch is mounted on the top of the punch rod, the punch rod and the internal hexagonal punch are integrally cut and die-cast, and the outer wall of the internal hexagonal punch and the outer wall of the top of the punch rod are both coated with chromium aluminum nitride.
[0007] Preferably, the internal hexagon punch includes a transition end and a stamping end. The transition end is a round boss connected to the front end of the punch rod. The transition end is connected to the drafting section, and the drafting section is connected to the stamping end. The stamping end is a cone.
[0008] Preferably, the angle A between the side edge of the draft section and the axis of the punch is 3 degrees.
[0009] Preferably, the top of the punch rod is a conical surface, and the conical surface is at a 6-degree angle relative to the punch rod axis.
[0010] Preferably, the bottom of the punch has a punching interface.
[0011] Preferably, the punch is made of M42 high-cobalt toughness high-speed steel by cutting and die casting.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. This utility model is integrally cut and die-cast from M42 high cobalt toughness high-speed steel, which greatly improves the structural strength. The material itself has high hardness and good machinability. At the same time, there is a coating on the outer surface of the internal hexagon punch and the top of the punch rod. The coating is chromium aluminum nitride, which has good wear resistance and thermal resistance, reduces the friction coefficient of the internal hexagon punch, reduces deformation caused by heat conduction during stamping, and also reduces the oxidation reaction of this utility model, increasing service life and surface hardness.
[0014] 2. This utility model sets the included angle A to 3 degrees, which reduces the friction when the punch is removed, facilitates smooth demolding, and improves stamping efficiency. By using a round boss at the transition end, a rounded corner will be formed after the punch is stamped, reducing the need for subsequent reprocessing and improving work efficiency. By setting the stamping end of the internal hexagon punch to a cone, the pressure of the internal hexagon punch on the contact surface of the part is increased, which facilitates stamping, reduces the wear of the internal hexagon punch, and improves the life of the internal hexagon punch. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;
[0017] Figure 2 This is a schematic diagram of the isometric view structure of Embodiment 2 of this utility model;
[0018] Figure 3 This is a schematic diagram of the new left-hand perspective structure of this utility model;
[0019] Figure 4 This is a partially enlarged structural diagram of component A of this utility model;
[0020] Figure 5 This is a partially enlarged structural schematic diagram of utility model B.
[0021] The attached diagram lists the components represented by each number as follows:
[0022] 1. Punch press interface; 2. Punch rod; 3. Hexagon socket punch; 4. Stamping end; 5. Draft section; 6. Transition end; 7. Angle A; 8. Conical surface. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings (1-5) of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.
[0024] Example 1
[0025] Please see the attached figure. Figure 1 This utility model provides a technical solution: a chromium nitride aluminum hexagonal screw mold, including a punch rod 2, an internal hexagonal punch 3 installed on the top of the punch rod 2, the punch rod 2 and the internal hexagonal punch 3 are integrally cut and die-cast, the outer wall of the internal hexagonal punch 3 and the top outer wall of the punch rod 2 are both sprayed with chromium nitride aluminum; the punch rod 2 is cut and die-cast from M42 high cobalt toughness high speed steel.
[0026] One specific application of this embodiment is as follows: This utility model is integrally cut and die-cast from M42 high-cobalt toughness high-speed steel, which greatly improves the structural strength. The material itself has high hardness and good machinability. Chromium aluminum nitride is sprayed on the outer wall of the internal hexagon punch 3 and the top outer wall of the punch rod 2 to increase wear resistance and thermal resistance, reduce the friction coefficient of the internal hexagon punch 3, reduce the deformation caused by thermal conduction due to stamping friction, and also reduce the oxidation reaction of this utility model, thereby increasing service life and surface hardness.
[0027] Example 2
[0028] Based on Example 1, as shown in the appendix Figure 2 and 3 A chromium aluminum nitride hexagonal screw mold includes a punch 2, with an internal hexagonal punch 3 mounted on the top of the punch 2. The punch 2 and the internal hexagonal punch 3 are integrally cut and die-cast. The outer wall of the internal hexagonal punch 3 and the top outer wall of the punch 2 are both coated with chromium aluminum nitride. The punch 2 is cut and die-cast from M42 high cobalt toughness high-speed steel. The internal hexagonal punch 3 includes a transition end 6 and a stamping end 4. The transition end 6 is a round boss connected to the front end of the punch 2. The transition end 6 is connected to a draft section 5. The draft section 5 is connected to the stamping end 4. The stamping end 4 is a cone. A punch press interface 1 is provided at the bottom of the punch 2.
[0029] As attached Figure 4As shown, the angle A7 between the side edge of the draft section 5 and the axis of the punch 2 is 3 degrees.
[0030] As attached Figure 5 As shown, the top of the shaft of the punch 2 is a cone 8, and the cone 8 is at a 6-degree angle relative to the axis of the punch 2;
[0031] In this embodiment, because the transition end 6 is a raised frustum, it will form a rounded corner after stamping, reducing the need for subsequent reprocessing and improving work efficiency. The top of the punch rod 2 is a conical surface 8, with the conical surface 8 at a 6-degree angle relative to the axis of the punch rod 2, reducing the force-bearing area and increasing the pressure borne by the internal hexagon punch 3 for convenient stamping. At the same time, it looks aesthetically pleasing. The bottom of the punch rod 2 has a punch press interface 1 for easy installation and clamping. The stamping end 4 is a cone, which increases the pressure of the internal hexagon punch 3 on the contact surface of the part, thus facilitating stamping, reducing the wear of the internal hexagon punch 3, and improving the life of the internal hexagon punch 3. Since the included angle A7 is 3 degrees, the friction force when the punch is removed can be reduced, which is conducive to smooth demolding and improves stamping efficiency.
[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A chromium nitride aluminum hexagonal screw die, comprising a punch (2), characterized in that: The top of the punch rod (2) is provided with an internal hexagon punch (3). The punch rod (2) and the internal hexagon punch (3) are integrally cast. The outer wall of the internal hexagon punch (3) and the top outer wall of the punch rod (2) are both sprayed with chromium aluminum nitride. The internal hexagon punch (3) includes a transition end (6) and a stamping end (4). The transition end (6) is a round boss connected to the front end of the punch rod (2). The transition end (6) is connected to the draft section (5). The draft section (5) is connected to the stamping end (4). The stamping end (4) is a cone.
2. The hexagonal screw mold for chromium nitride aluminum according to claim 1, characterized in that: The angle A (7) between the side edge of the draft section (5) and the axis of the punch (2) is 3 degrees.
3. The hexagonal screw mold for chromium nitride aluminum according to claim 1, characterized in that: The top of the punch (2) is a conical surface (8), and the conical surface (8) is at a 6-degree angle relative to the axis of the punch (2).
4. A hexagonal screw mold for chromium nitride aluminum according to claim 3, characterized in that: The punch rod (2) has a punching interface (1) at its bottom.
5. A hexagonal screw mold for chromium nitride aluminum according to claim 4, characterized in that: The punch (2) is made of Q10 ductile iron.