Die locking mechanism of roll forging machine

Abstract

The utility model belongs to the technical field of roll forging machines, and particularly relates to a die locking mechanism of a roll forging machine. Comprising a mounting base, a piston structure and a reset structure, the mounting base is arranged on a roller shaft, a cavity is formed in one end of the interior of the mounting base, a through hole communicated with the cavity is formed in the other end of the interior of the mounting base, the piston structure is arranged in the cavity, one end of the piston structure penetrates through the through hole to be used for pressing a mold, and the other end of the piston structure is connected with the reset structure; and an oil inlet pipeline communicated with the cavity and the oil inlet is arranged on the mounting seat. When the piston structure needs to loosen the die, the hydraulic oil is controlled to enter the cavity, the acting force of the reset structure is overcome, the piston structure is jacked back into the cavity, and therefore the die can be quickly loosened, and when the die needs to be jacked again and pressure is relieved, the reset structure acts on the piston structure to enable the piston structure to jack the die or the die pressing disc again. According to the utility model, the die replacement is convenient and fast, and the locking is reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of roll forging machines, in particular to a die locking mechanism of a roll forging machine. Background Art

[0002] An automatic roll forging machine presses an aluminum rod or an iron rod into parts with different diameters through upper and lower roll shafts and die chucks installed on the roll shafts, preparing for the subsequent forging and forming. Therefore, the installation of the die chuck requires accurate position, reliable locking, and convenient and quick die change. The prior art is to fix the die chuck at both ends of the driving roll shaft and the driven roll shaft by bolts manually. It is difficult to control the magnitude of the locking force of the die chuck, and it is very slow to tighten it manually, affecting the forging efficiency. Moreover, if adjusted improperly, it is particularly easy to change and loosen during the roll forging process, affecting the roll forging quality. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a die chuck locking mechanism with convenient and quick die change and reliable locking.

[0004] The technical solution adopted by the utility model to solve its technical problem is that the die locking mechanism of the roll forging machine includes a mounting seat, a piston structure, and a reset structure. The mounting seat is arranged on the roll shaft. One end inside the mounting seat is provided with a cavity, and the other end is provided with a through hole communicating with the cavity. The piston structure is arranged in the cavity and one end passes through the through hole for pressing the die. The other end of the piston structure is connected to the reset structure. An oil inlet is arranged on the mounting seat, and an oil inlet pipeline communicating the cavity with the oil inlet is arranged on the mounting seat.

[0005] Preferably, the piston structure includes a piston rod, a shaft sleeve, and a sealing cover. The shaft sleeve is arranged in the cavity. The sealing cover is arranged at the opening of the cavity and presses against the shaft sleeve. A piston cavity is formed inside the shaft sleeve and the sealing cover. The piston rod is arranged in the piston cavity and passes through the through hole for pressing the die.

[0006] Preferably, the mounting seat includes a fixed seat and a locking seat. The arc-shaped fixed seat and the locking seat are fixedly connected into a circle and fixed on the roll shaft. A plurality of cavities are arranged inside the locking seat.

[0007] Preferably, a counterbore is arranged at the connection between the fixed seat and the locking seat, and a bolt is arranged in the counterbore.

[0008] Preferably, the reset structure is a disc spring. A plurality of disc springs are arranged at one end of the piston rod, and both ends of the disc spring act on the piston rod and the sealing cover respectively.

[0009] Preferably, a sealing groove is arranged on the inner wall of the through hole, and a sealing ring is arranged in the sealing groove.

[0010] Preferably, a stepped first boss and a second boss are provided on the piston rod. The diameter of the first boss is larger than that of the second boss, and an oil chamber for storing hydraulic oil is formed between the end of the second boss and the end wall of the piston chamber.

[0011] Compared with the prior art, the beneficial effects of this technical solution are as follows:

[0012] In the utility model, a cavity is provided at one end inside the mounting seat, and a through hole is provided at the other end. The piston structure is arranged in the cavity. One end of the piston structure passes through the through hole to press the mold or the mold chuck, and the other end is connected to the reset structure. An oil inlet is provided on the mounting seat, and an oil inlet pipeline connecting the cavity and the oil inlet is also provided. When it is necessary to release the mold chuck by the piston structure, control the hydraulic oil to enter the cavity through the oil inlet pipeline, overcome the acting force of the reset structure, and push the piston structure back into the cavity, so that the mold can be quickly released. When it is necessary to press the mold again, just release the pressure. The utility model is convenient and fast during mold change and has reliable locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of a mold locking mechanism of a rotary forging machine according to the utility model.

[0014] Figure 2 It is a cross-sectional view of the mold chuck locking mechanism of the utility model.

[0015] Wherein: 1. Fixed seat; 2. Locking seat; 201. Piston chamber; 202. Sealing groove; 3. Piston rod; 301. First boss; 302. Second boss; 4. Sealing cover; 5. Roller shaft; 6. Mold chuck; 7. Oil inlet; 8. Counterbore; 9. Disc spring; 10. Bush. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Figures 1 - 2 It is the best embodiment of the utility model. The following further describes the utility model in conjunction with the attached Figures 1 - 2 drawings.

[0017] Refer to Figures 1 - 2 , the mold locking mechanism of the rotary forging machine includes a fixed seat 1, a locking seat 2, a piston rod 3, a bush 10, a reset structure and a sealing cover 4. The fixed seat 1 and the locking seat 2 are combined as a whole and arranged on the roller shaft 5. A plurality of mounting cavities are provided on the locking seat 2, and the locking structure is arranged in the mounting cavities. The bush 10 is arranged in the mounting cavities. The sealing cover 4 is arranged at one end of the bush 10 and presses the bush 10. The bush 10 is hollow to form a piston chamber 201. A through hole communicating with the piston chamber 201 is provided at the end of the locking seat 2 away from the sealing cover. The piston rod 3 is arranged in the piston chamber 201 and one end passes through the through hole and acts on the mold chuck 6, and the other end is connected to the reset structure. An oil inlet pipeline communicating with the piston chamber 201 is provided on the locking seat 2. One end of the oil inlet pipeline communicates with the piston chamber of each locking mechanism, and the other end communicates with the oil inlet 7.

[0018] Specifically, the fixed seat 1 and the locking seat 2 are two arc-shaped rings of the same size. There are four counterbores 8 at the connection, two on one side. They are assembled into a whole through fixing bolts and arranged on the roller shaft 5. The journal on the roller shaft 5 fixes the fixed seat 1 and the locking seat 2.

[0019] The locking mechanism is arranged on the locking seat 2. Four locking mechanisms are arranged along the circumference of the locking seat 2 to tightly press the die pressing plate 6 arranged on the roller shaft 5. The die is arranged between the two die pressing plates 6. One end of the interior of the locking seat 2 is provided with a cavity, and the other end is provided with a through hole. The sleeve 10 is arranged in the installation cavity, and the sealing cover 4 is arranged at the opening of the installation cavity and tightly presses the sleeve 10. The sleeve 10 and the interior of the sealing cover 4 are hollowly arranged to form a piston cavity 201. The piston rod 3 is arranged in the piston cavity 201 and passes through the through hole to act on the die pressing plate 6, and the other end passes through the reset structure and extends into the sealing cover 4.

[0020] In this embodiment, the reset structure is a disc spring 9, and it can also be any elastic structure such as a spring. The piston rod 3 is arranged in a stepped manner. The end extending into the sealing cover 4 is the first piston rod, the middle section is the second piston rod, and the part acting on the die pressing plate 6 is the third piston rod. The diameter of the second piston rod is greater than the diameter of the third piston rod which is greater than the diameter of the first piston rod. The sealing cover 4 is in interference fit with the cavity and is fixed on the locking seat 2 through bolts. The interior of the sealing cover 4 is provided with a stepped groove. The end close to the sleeve 10 is the first groove, and the diameter of the first groove is greater than the diameter of the second groove. The first piston rod passes through a plurality of disc springs 9 and extends into the second groove. The disc springs 9 are arranged between the first groove and the second piston rod. At this time, the disc springs 9 are in a compressed state, and the elastic force acts on the piston rod 3 to tightly press the die pressing plate 6.

[0021] A sealing groove 202 is provided on the inner wall of the through hole, and a sealing ring is arranged in the sealing groove 202 to prevent the hydraulic oil from overflowing from the acting end of the piston rod 3.

[0022] Stepped first bosses 301 and second bosses 302 are arranged on the second piston rod. The diameter of the first boss 301 is greater than the diameter of the second boss 302. The first boss 301 is slidably arranged with the piston cavity 201. The end of the second boss 302 and the end wall of the piston cavity 201 form an oil cavity for storing hydraulic oil. The locking seat 2 is provided with an oil inlet pipeline matching the locking mechanism. One end of each oil inlet pipeline communicates with the oil cavity, and the other end communicates with the oil inlet 7. The hydraulic oil enters each oil inlet pipeline through the oil inlet 7 and simultaneously enters the oil cavity to control the piston rod 3, so as to overcome the acting force of the reset structure at the same time and loosen the die pressing plate 6, thereby replacing the die.

[0023] Working process:

[0024] The piston rod 3 is under the elastic force of the disc spring 9 in the compressed state, and presses tightly against the die pressing plate 6 near the locking mechanism. The die is arranged between the two die pressing plates 6. When it is necessary to replace the die and loosen the die pressing plate 6, control the hydraulic oil to enter each oil inlet pipeline from the oil inlet 7, and thus enter the oil cavity simultaneously. The pressure in the oil cavity increases, and the pressure acts on each piston rod 3, enabling it to overcome the elastic force of the disc spring 9 and retract to loosen the die pressing plate 6. When it is necessary to press tightly against the die pressing plate 6 again, just relieve the pressure. The disc spring 9 will push out the piston rod 3 to press tightly against the die pressing plate 6, which is convenient and fast to operate and has firm locking.

[0025] The above is only the preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A die locking mechanism for a roll forging machine, characterized in that: The invention comprises a mounting seat, a piston structure and a reset structure. The mounting seat is arranged on a roller shaft (5). A cavity is arranged at one end inside the mounting seat, and a through hole connected to the cavity is arranged at the other end. The piston structure is arranged in the cavity and one end passes through the through hole for pressing the mold. The other end of the piston structure is connected to the reset structure. An oil inlet (7) is arranged on the mounting seat. An oil inlet pipeline connecting the cavity and the oil inlet (7) is arranged on the mounting seat.

2. The die locking mechanism of a roll forging machine according to claim 1, characterized in that: A plurality of cavities are arranged in the mounting seat, and a piston structure is arranged in each cavity.

3. The die locking mechanism of a roll forging machine according to claim 1, characterized in that: A mold pressing plate (6) is provided on the roller shaft (5), and the mold pressing plate (6) is arranged on one side of the mounting seat. One end of the piston structure passes through the through hole and presses the mold pressing plate (6).

4. The die locking mechanism of a roll forging machine according to claim 1, characterized in that: The piston structure comprises a piston rod (3), a shaft sleeve (10) and a sealing cover (4); the shaft sleeve (10) is arranged in a cavity; the sealing cover (4) is arranged at the opening of the cavity and is pressed against the shaft sleeve (10); the shaft sleeve (10) and the sealing cover (4) form a piston cavity (201) inside; and the piston rod (3) is arranged in the piston cavity (201).

5. The die locking mechanism of a roll forging machine according to claim 4, characterized in that: The reset structure is a disc spring (9), a plurality of disc springs (9) are arranged at one end of the piston rod (3), and two ends of the disc spring (9) act on the piston rod (3) and the sealing cover (4) respectively.

6. The die locking mechanism of a roll forging machine according to claim 4, characterized in that: A stepped first boss (301) and a second boss (302) are provided on the piston rod (3); the diameter of the first boss (301) is greater than the diameter of the second boss (302); the end of the second boss (302) and the end wall of the piston cavity (201) form an oil cavity for storing hydraulic oil.

7. The die locking mechanism of a roll forging machine according to claim 1, characterized in that: The mounting seat comprises a fixing seat (1) and a locking seat (2); the arc-shaped fixing seat (1) and the locking seat (2) are fixedly connected to form a circle and fixed on the roller shaft (5); a plurality of cavities are arranged in the locking seat (2).

8. The die locking mechanism of a roll forging machine according to claim 1, characterized in that: A sealing groove (202) is provided on the inner wall of the through hole, and a sealing ring is arranged in the sealing groove (202).

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