Roll forging die for long shaft parts

Abstract

The utility model discloses a roll forging die for long shaft parts, a round bar is equally divided into two semicircular cylinders along the radial direction to form the roll forging die, the roll forging die comprises an upper roll forging die and a lower roll forging die, the upper roll forging die and the lower roll forging die are respectively provided with a first end part, a first forming part, a second forming part and a second end part, and the second forming part and the second end part are integrally connected with the upper roll forging die and the lower roll forging die. The first end and the first forming portion are symmetrically arranged, the second end and the second forming portion are symmetrically arranged, the upper roll forging die and the lower roll forging die are connected with the roll forging machine in the same mode, the circumference of the roll forging die is designed to be a semi-cylinder, the roll forging cavity on the semi-circumference is designed to be in a two-end-symmetrical shape, the service life of the roll forging die can be prolonged by two times, and the roll forging die is suitable for being used for roll forging. And after the cavity at one end is completely worn, the cavity at the other end is used, so that the die cost of the blank is reduced.

Description

Technical Field

[0001] The utility model relates to the field of rotary forging, and more specifically, to a rotary forging die for long shaft parts. Background Art

[0002] The high-pressure common rail is a typical long shaft forging. At present, there are two common forging blanking processes for high-pressure common rails on the market. One is to directly forge the raw material after heating, and the other is to use free forging to make blanks. Direct forging of raw materials causes excessive waste of raw materials, and the manufacturing cost of products will remain high, which runs counter to the current cost concept. Free forging blanking has relatively high skill requirements for workers, and there are many uncontrollable factors in the manufacturing process.

[0003] The existing rotary forging die is designed at 120 degrees, that is, a circular bar can be cut into 3 sectors of 120 degrees, that is, 2 circular bars can be cut into 6 sectors of 120 degrees, that is, 3 pairs of rotary forging dies, that is, 3 sets of rotary forging dies (each set requires an upper roll and a lower roll). The original 3 sets can only be 3 sets. When the inlet section is damaged during use, since the other end cannot be used, the rotary forging die will be directly discarded, resulting in material waste and increased die cost.

[0004] Therefore, we make improvements in this regard and propose a rotary forging die for long shaft parts. Summary of the Utility Model

[0005] The purpose of the utility model is to address the problem that when the inlet section of the current rotary forging die is damaged during use, since the other end cannot be used, the rotary forging die will be directly discarded, resulting in material waste and increased cost.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0007] A rotary forging die for long shaft parts is provided to improve the above problems.

[0008] The technical solution of this application is as follows:

[0009] The circular bar is equally divided into two semi-cylindrical bodies along the radial direction to form a rotary forging die. The rotary forging die includes an upper rotary forging die and a lower rotary forging die. The upper rotary forging die and the lower rotary forging die are respectively provided with a first end portion and a first forming portion, as well as a second forming portion and a second end portion integrally connected thereto. The first end portion and the first forming portion are symmetrically arranged with the second end portion and the second forming portion. The connection methods used when the upper rotary forging die and the lower rotary forging die are connected to the rotary forging machine are the same.

[0010] As a preferred technical solution of this application, a nitrided layer on the surface of the first end portion, the first forming portion, the second forming portion, and / or the second end portion.

[0011] As a preferred technical solution of the present application, the material of the roll forging die is hot work die steel.

[0012] As a preferred technical solution of the present application, when the upper roll forging die and the lower roll forging die are connected to the roll forging machine, a threaded connection method is adopted.

[0013] As a preferred technical solution of the present application, when the upper roll forging die and the lower roll forging die are connected to the roll forging machine, a keyway connection method is adopted.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] In the solution of the present application:

[0016] 1. By setting the first end portion and the first forming portion to be symmetrically arranged with the second end portion and the second forming portion, when the first end portion is severely worn, turn it around and use the second end portion at the other end, which can double the service life of the roll forging die, thereby reducing the die cost of the blank, and solving the problem in the prior art that when the inlet section is damaged, since the other end cannot be used, the roll forging die will be directly discarded, resulting in material waste and increasing the die cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the roll forging die for long shaft parts provided by the present application;

[0018] Figure 2 is a top view structural diagram of the roll forging die for long shaft parts provided by the present application;

[0019] Figure 3 is a schematic structural diagram of the nitrided layer of the roll forging die for long shaft parts provided by the present application;

[0020] Figure 4 is a front view structural diagram of the roll forging die for long shaft parts provided by the present application;

[0021] Figure 5 is a schematic structural diagram when the upper roll forging die and the lower roll forging die provided by the present application are in use;

[0022] Figure 6 is a schematic structural diagram of the roll forging before improvement provided by the present application;

[0023] Figure 7 is a top view structural diagram of the roll forging before improvement provided by the present application;

[0024] Figure 8 is a front view structural diagram of the roll forging before improvement provided by the present application.

[0025] Labels in the figures:

[0026] 100. Long-axis parts; 10. Upper roll forging die; 20. Lower roll forging die; 2. First end; 3. First forming part; 4. Second forming part; 5. Second end; 6. Nitrided layer. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0028] Therefore, the following detailed description of the embodiments of the present utility model is not intended to limit the scope of the present utility model claimed, but merely represents some embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments may be combined with each other.

[0030] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the inventive product is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms 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 orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0032] Embodiment:

[0033] As Figure 1-4As shown in the figure, the present embodiment provides a rotary forging die for long shaft parts. A circular bar stock is equally divided into two semi-cylindrical bodies along the radial direction to form the rotary forging die. The rotary forging die includes an upper rotary forging die 10 and a lower rotary forging die 20. The upper rotary forging die 10 and the lower rotary forging die 20 are respectively provided with a first end 2 and a first forming part 3, as well as a second forming part 4 and a second end 5 integrally connected thereto. The first end 2 and the first forming part 3 are symmetrically arranged with the second end 5 and the second forming part 4. The connection methods adopted when the upper rotary forging die 10 and the lower rotary forging die 20 are connected to the rotary forging machine are the same. One circular bar stock can be cut into two semi-cylindrical bodies, and two circular bar stocks can be cut into four semi-cylindrical bodies, that is, two pairs of rotary forging dies, that is, two sets of rotary forging dies. However, the two sets of rotary forging dies are bidirectional, equivalent to four sets. When in use, after the first end 2 is severely worn, turn it around and use the second end 5 at the other end, which can double the service life of the rotary forging die 1, thereby reducing the die cost of the blank.

[0034] A nitrided layer 6 on the surfaces of the first end 2, the first forming part 3, the second end 4 and / or the second forming part 5.

[0035] The material of the rotary forging die 1 is hot work die steel.

[0036] In a specific embodiment, the upper rotary forging die 10 and the lower rotary forging die 20 are connected to the rotary forging machine by a threaded connection method.

[0037] In another specific embodiment, the upper rotary forging die 10 and the lower rotary forging die 20 are connected to the rotary forging machine by a keyway connection method.

[0038] The rotary forging die 1 in this embodiment is Figures 1 to 3 The two cavities shown in the figure. In actual products, it can be three passes or multiple passes.

[0039] The working principle of the present utility model: The rotary forging die for long shaft parts of the present utility model designs the rotary forging into semi-cylindrical bodies. One circular bar stock can be cut into two semi-cylindrical bodies, and two circular bar stocks can be cut into four semi-cylindrical bodies, that is, two pairs of rotary forging dies, that is, two sets of rotary forging dies. However, the two sets of rotary forging dies are bidirectional, equivalent to four sets. When in use, after the first end 2 is severely worn, turn it around and use the second end 5 at the other end, which can double the service life of the rotary forging die, thereby reducing the die cost of the blank.

[0040] All technical features in this embodiment can be freely combined according to actual needs.

[0041] The above embodiments are preferred implementation schemes of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present utility model.

Claims

1. A roll forging die for long-axis parts, characterized in that, The circular bar stock is equally divided into two semi-cylindrical bodies along the radial direction to form a roll forging die. The roll forging die includes an upper roll forging die (10) and a lower roll forging die (20). The upper roll forging die (10) and the lower roll forging die (20) are respectively provided with a first end portion (2) and a first forming portion (3), as well as a second forming portion (4) and a second end portion (5) integrally connected thereto. The first end portion (2) and the first forming portion (3) are symmetrically arranged with the second end portion (5) and the second forming portion (4). The connection methods used when the upper roll forging die (10) and the lower roll forging die (20) are connected to the roll forging machine are the same.

2. The roll forging die for long shaft parts according to claim 1, characterized in that, A nitrided layer (6) is provided on the surface of the first end portion (2), the first forming portion (3), the second forming portion (4) and / or the second end portion (5).

3. The roll forging die for long shaft parts according to claim 1, characterized in that, The material of the roll forging die is hot work die steel.

4. The roll forging die for long shaft parts according to claim 1, characterized in that, When the upper roll forging die (10) and the lower roll forging die (20) are connected to the roll forging machine, a threaded connection method is adopted.

5. The roll forging die for long shaft parts according to claim 1, characterized in that, When the upper roll forging die (10) and the lower roll forging die (20) are connected to the roll forging machine, a keyway connection method is adopted.

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