A block ejection structure suitable for flat, thin, large-hole gear forgings

Abstract

The utility model belongs to the technical field of forging dies, and specifically relates to a block ejection structure suitable for flat, thin and large-hole gear-type forgings; it comprises a rod part and a head part; a threaded section is arranged at the lower end of the rod part; the upper end of the head part is a cylinder, a threaded hole is arranged at the top of the cylinder, and four planes are arranged on four sides of the cylinder; the lower end of the head part is a conical structure, and the bottom of the head end is a contact surface with the forging part, and the contact surface is a convex structure, which can be fitted with the skin and part of the web of the forging part; the utility model separates the rod part and the head part and manufactures them with different materials, so as to achieve the effect of reducing costs; at the same time, the contact area between the head part and the forging part is increased, and the probability of deformed waste parts when the forging part is ejected can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the field of forging dies and relates to a block ejection structure suitable for flat, thin and large-hole gear forgings. Background Art

[0002] In the forging process of flat, thin, large-hole gear forgings, the forgings need to be ejected with a push rod after the forgings are precisely forged without flash. The following problems may occur when using the existing push rod:

[0003] 1. When the ejector pushes the forging out, the forging will be deformed or penetrated, and the forging will be embedded in the mold cavity, making it difficult or impossible to eject the forging, resulting in waste and shutdown;

[0004] 2. The head of the ejector pin is in contact with the hot forging for a long time. As the ejection force increases, it will quickly deform, wear and fail. At this time, the rod of the ejector pin remains intact, but the ejector pin and the head need to be replaced as a whole, resulting in high replacement costs. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a block ejection structure suitable for flat, thin, large-hole gear forgings.

[0006] A block ejection structure suitable for flat, thin, large-hole gear forgings comprises a rod 1 and a head 2; the rod 1 is provided with a threaded section 11 at the lower end; the head 2 is provided with a cylinder 21 at the upper end, a threaded hole 22 is provided at the top of the cylinder 21, and four planes 23 are provided on the four sides of the cylinder 21; the lower end of the head 2 is a conical structure, and the bottom of the head 2 is a contact surface with the forging, and the contact surface is a convex structure, which can fit with the skin 3 and the web 4 of the forging.

[0007] Furthermore, the threaded section 11 at the lower end of the rod 1 matches the threaded hole 22 of the head 2 for threaded connection.

[0008] Furthermore, the diameter of the cylinder 2 is D, and the four planes 23 are arranged to be parallel to each other, and the distance between each plane 23 and the opposite plane 23 is D-5 mm;

[0009] Furthermore, the distance S between the contact point between the edge of the head 2 and the forging web 4 and the lower end of the inner wall of the forging rim 5 is ≥ 10 mm;

[0010] Furthermore, the material used to make the rod 1 is 45 steel;

[0011] Furthermore, the material used to make the head 2 is H13 die steel.

[0012] Beneficial effects of the utility model:

[0013] 1. The utility model separates the head and the rod. The head in contact with the forging is made of H13 die steel with high wear resistance, and the rod that is not subjected to stress is made of 45 steel with low cost. When the head is worn and deformed, only the head needs to be replaced, which reduces the replacement cost of the ejector.

[0014] 2. The head contact surface of the utility model can fit with the skin and part of the web of the forging, which increases the contact area with the forging during ejection and is not easy to cause the forging to deform and produce waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the rod structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the head structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 4 It is a top view of the cylinder of the utility model;

[0019] Figure 5 This is a schematic diagram of the assembly of the utility model;

[0020] In the figure: 1-rod, 11-threaded section, 2-head, 21-cylinder, 22-threaded hole, 23-plane, 3-skin, 4-web, 5-rim, 6-die. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention.

[0022] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The utility model includes a rod 1 and a head 2; a threaded section 11 is arranged at the lower end of the rod 1; the upper end of the head 2 is a cylinder 21, a threaded hole 22 is arranged at the top of the cylinder 21, and four planes 23 are arranged on the four sides of the cylinder 21; the lower end of the head 2 is a conical structure, and the bottom of the head 2 is a contact surface with the forging, and the contact surface is a convex structure, which can fit with the skin 3 and part of the web 4 of the forging, so that when the forging is ejected by the ejector, the skin 3 and the web 4 are subjected to force at the same time.

[0023] Furthermore, the threaded section 11 at the lower end of the rod 1 matches the threaded hole 22 of the head 2 for threaded connection.

[0024] Furthermore, the diameter of the cylinder 2 is D, and the four planes 23 arranged on the four sides are parallel to each other, so that the head 2 can be clamped with a wrench when the rod 1 and the head 2 are connected, and the distance between each plane 23 and the opposite plane 23 is D-5mm;

[0025] Furthermore, the distance S between the contact point between the edge of the head 2 and the forging web 4 and the lower end of the inner wall of the forging wheel rim 5 is ≥10 mm to ensure that the mold at this position will not be deformed due to being too thin;

[0026] Furthermore, the material used to make the rod 1 is 45 steel, which has a relatively low cost.

[0027] Furthermore, the material used to make the head 2 is H13 die steel, which has strong wear resistance to ensure the strength of the head.

[0028] See also Figure 5 The working mechanism of the utility model is as follows: after the forging is formed, the forging needs to be ejected from the die 6, the ejector head 2 is in close contact with the skin and web of the forging, the ejector's own gravity and ejection force are applied to the skin and web of the forging, overcoming the resistance between the forging and the die 6 to eject the forging.

[0029] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] The specific embodiments described above further illustrate the technical problems solved by the present invention, the technical solutions and the beneficial effects. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A block ejection structure suitable for flat, thin, large-hole gear forgings, characterized in that: The invention comprises a rod (1) and a head (2); the lower end of the rod (1) is provided with a threaded section (11); the upper end of the head (2) is a cylinder (21), the top of the cylinder (21) is provided with a threaded hole (22), and four planes (23) are provided on four sides of the cylinder (21); the lower end of the head (2) is a conical structure, and the bottom of the lower end of the head (2) is a contact surface with a forging, and the contact surface is a convex structure and can be fitted with a skin (3) and a web (4) of the forging.

2. The block ejection structure suitable for flat, thin, large-hole gear forgings according to claim 1 is characterized in that: The threaded section (11) at the lower end of the rod (1) matches the threaded hole (22) of the head (2) for threaded connection.

3. The block ejection structure suitable for flat, thin, large-hole gear forgings according to claim 1 is characterized in that: The diameter of the cylinder (21) is D, and the four planes (23) are arranged to be parallel to each other, and the distance between each plane (23) and the opposite plane (23) is D-5 mm.

4. The block ejection structure suitable for thin and large-hole gear forgings according to claim 1 is characterized in that: The distance S between the contact point between the edge of the head (2) and the forging web (4) and the lower end of the inner wall of the forging wheel rim (5) is ≥10 mm.

5. The block ejection structure suitable for flat, thin, large-hole gear forgings according to claim 1 is characterized in that: The rod part (1) is made of 45 steel.

6. The block ejection structure suitable for flat, thin, large-hole gear forgings according to claim 1 is characterized in that: The head (2) is made of H13 die steel.

Images