A forging mold cavity pressure relief structure for annular forgings

Abstract

The utility model relates to the technical field of mold processing, and specifically to a forging model cavity pressure relief structure of an annular forging, comprising an upper forging die and a lower forging die. When in use, under the top pressure of a spring sheet, an upper pressure plate on the upper forging die and a lifting plate connected thereto will move downward synchronously along a side pressure plate. When the upper forging die is molded with a lower forging die below, the forging in the forging model cavity will deform toward the inner side wall direction of the model cavity, and high air pressure is likely to appear first on the side of the cavity. At this time, the high air pressure on the side pushes the side pressure plate, so that the side pressure plate deflects around a hinge with the forging lower die. At this time, a transverse pressure relief hole is opened to realize a pressure relief operation. At the same time, the deflected side pressure plate will also drive the upper pressure plate to deflect synchronously via the lifting plate. At this time, the longitudinal pressure relief hole is opened, and the high air pressure on the upper side of the forging model cavity will be released, thereby realizing comprehensive pressure relief of the inside of the model cavity, and ensuring the quality of the finished product of the annular forging.

Description

Technical Field

[0001] The utility model relates to the technical field of mold processing, in particular to a forging mold cavity pressure relief structure of an annular forging. Background Art

[0002] Ring forgings are widely used. After the initial forming by pre-forging, they need to be finely forged in the die under a press. Driven by pressure, the ring forgings expand radially in the die cavity and eventually form the required ring size. The existing ring forging dies will be equipped with corresponding pressure relief structures.

[0003] For example, a Chinese patent with application number CN202122122831.4 discloses an annular forging die device with a pressure relief structure, including a die platform and a main power part, and is characterized in that the device also includes: an automatic pressure relief mechanism, at least one forging upper die is provided, one side of the forging upper die is equidistantly provided with a pressure relief unit, the side of the pressure relief unit connected to the forging upper die is provided with a main power part, and the pressure relief unit performs reciprocating motion under the action of the main power part; a flipping mechanism, at least one forging lower die is provided, one side of the forging lower die is provided with a flipping handle, and the corresponding side of the flipping handle is provided with a rotating part, and the flipping handle drives the rotating part to drive the forging lower die to flip, which can solve the current problems of high air pressure in the forging cavity and inability to relieve pressure, and low yield. However, in actual use, the forging in the forging model cavity will deform toward the inner side wall of the model cavity, making it easy for high air pressure to appear on the side of the cavity first. If the air pressure area is not connected and the pressure is only released from the top, it is impossible to fully release the pressure inside the model cavity at the same time, affecting the quality of the finished ring forging. Utility Model Content

[0004] In view of this, the purpose of the utility model is to propose a forging model cavity pressure relief structure for an annular forging, so as to solve the technical problem in the prior art that high air pressure will appear on the side of the cavity in the forging model cavity, and pressure relief only from the top cannot simultaneously relieve pressure on the side of the cavity, affecting the quality of the finished annular forging.

[0005] Based on the above purpose, the utility model provides a forging mold cavity pressure relief structure of an annular forging, including a forging upper die and a forging lower die, the upper end of the forging upper die is provided with a main force piece, the forging lower die is provided with a guide column, the forging upper die is slidably mounted on the guide column, the forging upper die is provided with a longitudinal pressure relief hole, the forging lower die is provided with a transverse pressure relief hole, the pressure relief structure is installed on the forging lower die, and the pressure relief structure includes:

[0006] A side pressure plate, the side pressure plate is hinged to the side end of the forging lower die, a lifting plate is slidably arranged on the side pressure plate, a tension spring is connected to the side end of the side pressure plate, the other end of the tension spring is connected to a fixing seat, the fixing seat is installed in the forging lower die, and the side pressure plate closes the side end of the transverse pressure relief hole;

[0007] An upper pressing plate is installed on the top of the lifting plate, and the upper pressing plate closes the upper end of the longitudinal pressure relief hole through a spring sheet.

[0008] Furthermore, the longitudinal pressure relief hole and the transverse pressure relief hole are both stepped holes.

[0009] Furthermore, pressure relief plugs are provided in both the longitudinal pressure relief hole and the transverse pressure relief hole, a limiting groove is provided on one side of the pressure relief plug, and an exhaust port is provided on the other side of the pressure relief plug.

[0010] Furthermore, a connecting piece is slidably provided on the guide column, and the connecting piece is bolted to the forging upper die.

[0011] Furthermore, a spring is sleeved on the guide column between the connecting piece and the forging lower die.

[0012] Furthermore, there are two longitudinal pressure relief holes and two transverse pressure relief holes, and the two transverse pressure relief holes are respectively arranged on both sides of the forging lower die.

[0013] The beneficial effects of the utility model are as follows: the forging model cavity pressure relief structure of a ring forging of the utility model is adopted. When in use, under the top pressure of the spring sheet, the upper pressure plate on the forging upper die and the lifting plate connected thereto will move downward synchronously along the side pressure plate. When the forging upper die is closed with the forging lower die below, the forging in the forging model cavity will deform toward the inner side wall of the model cavity, and high air pressure will first appear on the side of the cavity. At this time, the high air pressure on the side pushes the side pressure plate, causing the side pressure plate to deflect around the hinge with the forging lower die. At this time, the transverse pressure relief hole is opened to realize the pressure relief operation. At the same time, the deflected side pressure plate will also drive the upper pressure plate to deflect synchronously through the lifting plate. At this time, the longitudinal pressure relief hole is opened, and the high air pressure at the top of the forging model cavity will be released, thereby realizing comprehensive pressure relief of the inside of the model cavity, thereby ensuring the quality of the finished ring forging. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0016] Figure 2 It is a structural schematic diagram of the forging upper die in the utility model;

[0017] Figure 3 It is a structural schematic diagram of the forging lower die in the utility model;

[0018] Figure 4 It is a schematic diagram of the assembly of the internal structure of the pressure relief structure of the utility model;

[0019] Figure 5 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 6 for Figure 5 A magnified view of the structure at center A;

[0021] Figure 7 for Figure 5 A magnified view of the structure at point B.

[0022] The markings in the figure are:

[0023] 1. Forging upper die; 2. Forging lower die; 3. Guide column; 4. Longitudinal pressure relief hole; 5. Horizontal pressure relief hole; 6. Side pressure plate; 7. Lifting plate; 8. Tension spring; 9. Fixed seat; 10. Upper pressure plate; 11. Spring leaf; 12. Pressure relief plug; 13. Limiting groove; 14. Exhaust port; 15. Connector; 16. Spring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0025] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] The utility model proposes a forging mold cavity pressure relief structure for an annular forging, such as Figure 1 , Figures 4 to 7 As shown, it includes a forging upper die 1 and a forging lower die 2. The upper end of the forging upper die 1 is provided with a main force member, and the forging lower die 2 is provided with a guide column 3. The forging upper die 1 is slidably mounted on the guide column 3. The forging upper die 1 is provided with a longitudinal pressure relief hole 4, and the forging lower die 2 is provided with a transverse pressure relief hole 5. The pressure relief structure is installed on the forging lower die 2, and the pressure relief structure includes:

[0027] A side pressure plate 6 is hinged to the side end of the forging lower die 2, and a lifting plate 7 is slidably arranged on the side pressure plate 6. A tension spring 8 is connected to the side end of the side pressure plate 6, and the other end of the tension spring 8 is connected to a fixing seat 9. The fixing seat 9 is installed in the forging lower die 2, and the side pressure plate 6 closes the side end of the transverse pressure relief hole 5;

[0028] The upper pressing plate 10 is installed on the top of the lifting plate 7 , and the upper pressing plate 10 closes the upper end of the longitudinal pressure relief hole 4 through the spring leaf 11 .

[0029] In this embodiment, when in use, the pre-forged annular forging is placed in the forging die cavity of the forging lower die 2, and then the main force member is driven downward by the press, driving the forging upper die 1 to move downward along the guide column 3, and then under the top pressure of the spring 11, the upper pressure plate 10 on the forging upper die 1 and the lifting plate 7 connected thereto will move downward along the side pressure plate 6 synchronously. When the forging upper die 1 is closed with the forging lower die 2 below, the forging in the forging mold cavity will deform toward the inner side wall of the mold cavity, and high pressure is likely to appear first on the side of the cavity. At this time, the high air pressure on the side pushes the side pressure plate 6, causing the side pressure plate 6 to deflect around the hinge with the forging lower die 2. At this time, the transverse pressure relief hole 5 is opened to realize the pressure relief operation. At the same time, the deflected side pressure plate 6 will also drive the upper pressure plate 10 to deflect synchronously through the lifting plate 7. At this time, the longitudinal pressure relief hole 4 is opened, and the high air pressure at the top of the forging model cavity will be released, thereby realizing comprehensive pressure relief inside the model cavity. After the pressure relief is completed, under the joint action of the tension spring 8 and the spring leaf 11, the sealing of the forging model cavity is restored and the pressure is maintained to shape.

[0030] In this embodiment, if Figure 2 , Figure 3 , Figure 6 , Figure 7 As shown, the longitudinal pressure relief hole 4 and the transverse pressure relief hole 5 are both stepped holes, and pressure relief plugs 12 are provided in the longitudinal pressure relief hole 4 and the transverse pressure relief hole 5. A limiting groove 13 is provided on one side of the pressure relief plug 12, and an exhaust port 14 is provided on the other side of the pressure relief plug 12 to ensure that the longitudinal pressure relief hole 4 and the transverse pressure relief hole 5 are effectively closed without affecting the pressure relief operation.

[0031] In this embodiment, if Figure 1 , Figure 2As shown, a connecting piece 15 is slidably provided on the guide column 3, and the connecting piece 15 is bolted to the forging upper die 1. The fast mold change can be achieved by disassembling and assembling the fixing bolts. A spring 16 is sleeved between the connecting piece 15 and the forging lower die 2 on the guide column 3 to ensure that the forging upper die 1 can move stably on the guide column 3 during the up and down reciprocating motion of the press.

[0032] In addition, preferably, Figure 1 , Figure 2 , Figure 3 As shown, there are two longitudinal pressure relief holes 4 and two transverse pressure relief holes 5, and the two transverse pressure relief holes 5 are respectively arranged on both sides of the forging lower die 2 to facilitate the rapid placement and removal of the annular forgings.

[0033] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0034] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A forging mold cavity pressure relief structure for an annular forging, comprising a forging upper die (1) and a forging lower die (2), wherein a main force member is arranged at the upper end of the forging upper die (1), a guide column (3) is arranged on the forging lower die (2), and the forging upper die (1) is slidably mounted on the guide column (3), characterized in that: The forging upper die (1) is provided with a longitudinal pressure relief hole (4), the forging lower die (2) is provided with a transverse pressure relief hole (5), the pressure relief structure is installed on the forging lower die (2), and the pressure relief structure comprises: A side pressure plate (6), the side pressure plate (6) is hinged to the side end of the forging lower die (2), a lifting plate (7) is slidably arranged on the side pressure plate (6), the side end of the side pressure plate (6) is connected to a tension spring (8), the other end of the tension spring (8) is connected to a fixing seat (9), the fixing seat (9) is installed in the forging lower die (2), and the side pressure plate (6) closes the side end of the transverse pressure relief hole (5); An upper pressure plate (10), the upper pressure plate (10) is installed on the top of the lifting plate (7), and the upper pressure plate (10) closes the upper end of the longitudinal pressure relief hole (4) through a spring leaf (11).

2. The forging mold cavity pressure relief structure of an annular forging according to claim 1 is characterized in that: The longitudinal pressure relief hole (4) and the transverse pressure relief hole (5) are both stepped holes.

3. The forging mold cavity pressure relief structure of a ring forging according to claim 2 is characterized in that: A pressure relief plug (12) is provided in each of the longitudinal pressure relief hole (4) and the transverse pressure relief hole (5); a limiting groove (13) is provided on one side of the pressure relief plug (12); and an exhaust port (14) is provided on the other side of the pressure relief plug (12).

4. The forging mold cavity pressure relief structure of an annular forging according to claim 1 is characterized in that: A connecting piece (15) is slidably arranged on the guide column (3), and the connecting piece (15) is bolted to the forging upper die (1).

5. The forging mold cavity pressure relief structure of an annular forging according to claim 4 is characterized in that: A spring (16) is sleeved on the guide column (3) between the connecting piece (15) and the forging lower die (2).

6. The forging mold cavity pressure relief structure of an annular forging according to claim 1, characterized in that: There are two longitudinal pressure relief holes (4) and two transverse pressure relief holes (5), and the two transverse pressure relief holes (5) are respectively arranged on both sides of the forging lower die (2).

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