A self-lubricating reverse extrusion tube forging die

Abstract

The utility model relates to a self-lubricating reverse extrusion tube forging die, which belongs to the technical field of reverse extrusion tube forging dies, and includes: an upper die plate, a punching rod, a lubricating oil supply pipe and a lower die plate, wherein an insertion hole is provided in the middle of the upper die plate; the top end of the punching rod is inserted into the insertion hole and a fixed groove is provided on the outer wall surface of the rod, a circulation channel connected with the fixed groove is provided inside the lower end thereof, and an annular oil outlet groove is provided on the outer wall surface of the lower end rod, and the oil outlet groove is connected with the circulation channel; the lubricating oil supply pipe is embedded in the fixed groove; the top surface of the lower die plate is provided with a forging groove; the punching rod and the lubricating oil supply pipe can slide into the forging groove movably. The utility model uses the lubricating oil supply pipe to introduce lubricating oil into the circulation channel and flow into the oil outlet groove. When the punching rod slides into the forging groove and collides with the object to be pressed, the lubricating oil quickly flows out of the oil outlet groove and spreads over the entire outer wall surface of the punching rod, thereby improving the uniformity of lubricating oil application and the safety of the application operation.

Description

Technical Field

[0001] The utility model relates to the technical field of reverse extrusion tube forging dies, in particular to a reverse extrusion tube forging die with self-lubrication. Background Art

[0002] When forging reverse extrusion pipes with a diameter greater than 300mm and a length greater than 700mm, in order to improve the dimensional accuracy of the reverse extrusion forged pipe (uniform length around the forged pipe port and uniform wall thickness) and the efficiency of forging pipe demoulding, two people will be arranged on both sides of the die to use special tools to dip in a release agent to lubricate the punch rod and the third rod section. However, in the process of dipping in the release agent for application, waste is likely to occur. In addition, due to differences in personnel operations, the release agent is not applied evenly, which can easily cause large differences in the height of the upper port. Materials will be wasted during subsequent sawing and processing, leading to problems such as low forging yield.

[0003] In order to solve the above technical problems, some manufacturers have developed a reverse extrusion tube forging die with a lubricating oil injection device. The specific structure is that a lubricating oil injection device and an AGV trolley are added to the outside of the original reverse extrusion tube forging die. The lubricating oil injection device is fixed on the AGV trolley. When the reverse extrusion tube forging die needs lubrication, the AGV trolley is loaded with the lubricating oil injection device and moves along the circumference of the reverse extrusion tube forging die and sprays lubricating oil to the reverse extrusion tube forging die. The main technical defects of the above structure are: ① The equipment cost is relatively high. The addition of an AGV trolley and a lubricating oil injection device will greatly increase the manufacturing cost and subsequent maintenance cost of the reverse extrusion tube forging die; ② It is easy to increase the risk of collision. When the AGV trolley moves in a circle, it is very easy to collide with the operator of the reverse extrusion tube forging die, resulting in serious safety accidents; ③ There is a lot of lubricating oil waste. The use of a lubricating oil injection device can easily spray the lubricating oil to unnecessary places, resulting in an increase in the amount of lubricating oil waste.

[0004] Therefore, how to design a self-lubricating reverse extrusion tube forging die with simple structure, low cost, convenient use and safe operation is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] The utility model provides a self-lubricating reverse extrusion tube forging die, which solves the technical problems of the existing reverse extrusion tube forging die with lubrication function, such as high cost, complicated operation, easy occurrence of traffic safety accidents and large amount of lubricating oil waste.

[0006] The utility model solves the above technical problems with the following technical solutions: a self-lubricating reverse extrusion tube forging die, comprising: an upper die plate, a punch rod, a lubricating oil supply pipe and a lower die plate,

[0007] An insertion hole is provided in the middle of the upper template; the punching rod is arranged vertically below the upper template and its top end is inserted into the insertion hole, a fixing groove arranged along its axial direction is provided on the rod outer wall surface of the punching rod and a circulation channel communicating with the fixing groove is provided inside its lower end, an annular oil outlet groove is provided on the rod outer wall surface of the lower end of the punching rod and the oil outlet groove is communicated with the circulation channel; the lubricating oil supply pipe is embedded in the fixing groove and one end of it is communicated with the circulation channel, and the other end of it extends out of the fixing groove; the lower template is located below the punching rod and a forging groove is provided on its top surface; the punching rod and the lubricating oil supply pipe can movably slide into the forging groove.

[0008] The beneficial effect of the utility model is as follows: lubricating oil is introduced into the circulation channel by means of a lubricating oil supply pipe, and the lubricating oil flows through the circulation channel and then flows into the oil outlet groove. When the punching rod slides into the forging groove and collides with the object to be pressed, the lubricating oil quickly flows out from the oil outlet groove and covers the entire outer wall surface of the punching rod, thereby replacing manual application or injection by a lubricating oil injection device, reducing equipment costs, and improving the uniformity of lubricating oil application and the safety of application operations.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the stamping rod includes a first rod segment, a second rod segment and a third rod segment that are detachably connected in sequence along its axial direction, the top end of the first rod segment is inserted into the insertion hole; the fixing groove is arranged on the outer wall surface of the rod of the second rod segment; the circulation channel is arranged inside the second rod segment and the third rod segment; the oil outlet groove ring is arranged on the outer wall surface of the rod of the third rod segment.

[0011] Furthermore, the third rod segment is a punch.

[0012] A further beneficial effect of adopting the above method is that the stamping rod is divided into a first rod segment, a second rod segment and a third rod segment in sequence along its axis. When it is necessary to forge reverse extrusion tubes of different axial lengths, second rod segments of different lengths can be replaced, thereby increasing the adaptability of the reverse extrusion tube forging die; at the same time, when the third rod segment is damaged by collision, a new third rod segment can also be quickly replaced to avoid the replacement of the third rod segment affecting the normal production rhythm.

[0013] Furthermore, it also includes an ejection part, and the bottom of the forging groove is provided with an ejection hole; the ejection part includes a first ejection plate and a second ejection plate formed integrally from bottom to top, and the first ejection plate is adapted to be detachably inserted in the ejection hole; the second ejection plate is placed in the forging groove and the bottom surface corresponding to the outer peripheral side of the second ejection plate can be pressed against the groove bottom of the forging groove corresponding to the outer peripheral side of the ejection hole.

[0014] The further beneficial effects of adopting the above are:

[0015] 1. Pushing the first ejector plate and the second ejector plate upwards can quickly eject the forged object after forging, thereby improving the efficiency of removing the forged object;

[0016] 2. The ejection part is divided into a first ejection plate and a second ejection plate from bottom to top. Since the bottom surface of the second ejection plate corresponding to the outer peripheral side of the first ejection plate can contact the bottom of the groove on the outer peripheral side of the ejection hole corresponding to the forging groove, the first ejection plate and the second ejection plate can be prevented from falling abnormally from under the ejection hole, thereby improving the safety and convenience of using the reverse extrusion tube forging die.

[0017] Furthermore, it also includes a flow control valve, which is installed at the other end of the lubricating oil supply pipe extending out of the fixed groove.

[0018] A further beneficial effect of the above method is that the flow control valve is used to control the lubricating oil supply amount of the lubricating oil supply pipe, so that an appropriate amount of lubricating oil can be supplied according to the actual needs of forging, thereby reducing the waste of lubricating oil.

[0019] Furthermore, the longitudinal section of the oil outlet groove is a "<"-shaped structure.

[0020] A further beneficial effect of the above is that the longitudinal section of the oil outlet groove is designed as a "<"-shaped structure to facilitate the outflow of the lubricating oil.

[0021] Furthermore, the lubricating oil supply pipe is made of a metal material that is resistant to high temperature and high pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a self-lubricating reverse extrusion tube forging die of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of a self-lubricating reverse extrusion tube forging die of the utility model;

[0024] Figure 3 for Figure 2 A is an enlarged schematic diagram of the structure.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Upper template, 11. Insert hole, 2. Punching rod, 21. Fixing groove, 22. Circulation channel, 23. Oil outlet groove, 24. First rod section, 25. Second rod section, 26. Third rod section, 3. Lubricating oil supply pipe, 4. Lower template, 41. Forging groove, 411. Ejection hole, 5. Ejection part, 51. First ejection plate, 52. Second ejection plate, 6. Flow control valve, 7. Object to be pressed. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0028] like Figure 1 As shown, a self-lubricating reverse extrusion tube forging die comprises: an upper die plate 1, a punch rod 2, a lubricating oil supply pipe 3 and a lower die plate 4.

[0029] An insertion hole 11 is provided in the middle of the upper template 1; the punching rod 2 is arranged vertically below the upper template 1 and its top end is inserted into the insertion hole 11, a fixing groove 21 is provided on the outer wall of the punching rod 2 along its axial direction, and a circulation channel 22 is provided inside its lower end to communicate with the fixing groove 21, and an annular oil outlet groove 23 is provided on the outer wall of the lower end of the punching rod 2, and the oil outlet groove 23 is communicated with the circulation channel 22; the lubricating oil supply pipe 3 is embedded in the fixing groove 21, and one end of it is connected with the circulation channel 22, and the other end thereof extends out of the fixing groove 21; the lower template 4 is located at the punching rod 2 A forging groove 41 is provided at the bottom and on the top surface; the punching rod 2 and the lubricating oil supply pipe 3 can slide into the forging groove 41 movably; in the above structure, the lubricating oil supply pipe 3 is used to introduce lubricating oil into the circulation channel 22, and the lubricating oil flows through the circulation channel 22 and flows into the oil outlet groove 23. When the punching rod 2 slides into the forging groove 41 and collides with the object to be pressed 7, the lubricating oil quickly flows out from the oil outlet groove 23 and spreads all over the outer wall of the punching rod 2, thereby replacing manual application or injection by a lubricating oil injection device, reducing equipment costs, and improving the uniformity of lubricating oil application and the safety of application operations.

[0030] In some specific embodiments, the stamping rod 2 may include a first rod segment 24, a second rod segment 25 and a third rod segment 26 that are detachably connected in sequence along its axial direction, the top end of the first rod segment 24 is inserted into the insertion hole 11; the fixing groove 21 is arranged on the outer wall surface of the rod of the second rod segment 25; the circulation channel 22 is arranged inside the second rod segment 25 and the third rod segment 26; and the oil outlet groove 23 is arranged on the outer wall surface of the rod of the third rod segment 26.

[0031] Specifically, the third rod segment 26 may be a punch.

[0032] In some specific embodiments, an ejection portion 5 may also be included, and an ejection hole 411 is provided at the bottom of the forged groove 41; the ejection portion 5 includes, from bottom to top, an integrally formed first ejection plate 51 and a second ejection plate 52, and the first ejection plate 51 is adapted to be detachably inserted in the ejection hole 411; the second ejection plate 52 is placed in the forged groove 41 and the bottom surface corresponding to the outer peripheral side of the second ejection plate 52 can be pressed against the groove bottom on the outer peripheral side of the ejection hole 411 of the forged groove 41.

[0033] In some specific embodiments, a flow control valve 6 may also be included. The flow control valve 6 is installed at the other end of the lubricating oil supply pipe 3 extending out of the fixed groove 21 .

[0034] Specifically, the longitudinal section of the oil outlet groove 23 is a "<"-shaped structure.

[0035] Specifically, the lubricating oil supply pipe 3 can be made of a metal material that is resistant to high temperature and high pressure.

[0036] The above are only preferred embodiments of the present invention and are 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 self-lubricating reverse extrusion tube forging die, characterized in that: include: An upper template (1), wherein a fixing hole (11) is provided in the middle of the upper template (1); A punching rod (2), the punching rod (2) being arranged vertically below the upper template (1) and having its top end inserted into the insertion hole (11), a fixing groove (21) arranged along its axial direction is provided on the rod outer wall surface of the punching rod (2), and a circulation channel (22) communicating with the fixing groove (21) is provided inside the lower end of the punching rod (2), and an annular oil outlet groove (23) is provided on the rod outer wall surface of the lower end of the punching rod (2), and the oil outlet groove (23) communicates with the circulation channel (22); a lubricating oil supply pipe (3), wherein the lubricating oil supply pipe (3) is embedded in the fixing groove (21) and one end of the lubricating oil supply pipe (3) is connected to the circulation channel (22), and the other end of the lubricating oil supply pipe (3) extends out of the fixing groove (21); A lower mold plate (4) is located below the punching rod (2) and has a forging groove (41) on its top surface; the punching rod (2) and the lubricating oil supply pipe (3) can movably slide into the forging groove (41).

2. A self-lubricating reverse extrusion tube forging die according to claim 1, characterized in that: The punching rod (2) comprises a first rod segment (24), a second rod segment (25) and a third rod segment (26) which are detachably connected in sequence along the axial direction thereof; the top end of the first rod segment (24) is inserted and fixed in the insertion hole (11); the fixing groove (21) is arranged on the rod outer wall surface of the second rod segment (25); the circulation channel (22) is arranged inside the second rod segment (25) and the third rod segment (26); and the oil outlet groove (23) is arranged in a ring on the rod outer wall surface of the third rod segment (26).

3. A self-lubricating reverse extrusion tube forging die according to claim 2, characterized in that: The third rod section (26) is a punch.

4. A self-lubricating reverse extrusion tube forging die according to claim 1, characterized in that: The invention also comprises an ejection portion (5), wherein the bottom of the forging groove (41) is provided with an ejection hole (411); the ejection portion (5) comprises, from bottom to top, a first ejection plate (51) and a second ejection plate (52) which are integrally formed, wherein the first ejection plate (51) is adapted to be detachably inserted into the ejection hole (411); the second ejection plate (52) is disposed in the forging groove (41), and the bottom surface of the second ejection plate (52) corresponding to the outer peripheral side can press against the groove bottom of the forging groove (41) corresponding to the outer peripheral side of the ejection hole (411).

5. The self-lubricating reverse extrusion tube forging die according to claim 1, characterized in that: It also includes a flow control valve (6), which is installed at the other end of the lubricating oil supply pipe (3) extending out of the fixed groove (21).

6. A self-lubricating reverse extrusion tube forging die according to claim 1, characterized in that: The longitudinal section of the oil outlet groove (23) is a "<"-shaped structure.

7. A self-lubricating reverse extrusion tube forging die according to claim 1, characterized in that: The lubricating oil supply pipe (3) is made of a high temperature and high pressure resistant metal material.

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