A positioning mechanism for gear forging

Abstract

The present invention belongs to the field of forging positioning devices, and specifically discloses a positioning mechanism for gear forging, including a delayed semi-locking mechanism, a press-sinking locking mechanism, a sliding split limiting mechanism and a lifting forging mechanism, wherein the delayed semi-locking mechanism includes a ratchet assembly, a telescopic locking assembly, a one-way air intake assembly and a delayed exhaust assembly. The present invention creatively proposes a delayed semi-locking mechanism, which continuously maintains the air pressure in the transverse chamber by the air provided during each forging, so that as long as it is a short-spacing continuous forging, the transverse moving die will not automatically unlock and separate, and after a round of forging is completed, the separation of the transverse moving die can be completed. At this time, the workpiece has the clamping conditions, so it is easy to be taken away by an external clamping device and returned to the furnace or enter the next process.

Description

Technical Field

[0001] The invention belongs to the technical field of forging positioning devices, and in particular relates to a positioning mechanism for gear forging. Background Art

[0002] During the gear forging process, it is often forged into a cylinder first, and then processed into a gear through processing methods such as gear shaping. Since the gear is roughly a braided cylinder, during the production process, a mold with a round hole in the middle is often used for forging in the intermediate process to keep the size within the tolerance.

[0003] Since forging is to deform the workpiece by pressure, the embarrassing situation of parts getting stuck in the die often occurs during forging. At this time, the blank is completely stuck in the die with no clamping position, so it is difficult to remove the workpiece.

[0004] There are some split molds on the market, but these molds are generally connected by bolts, which makes disassembly time-consuming and labor-intensive. There is not much difference in actual operation compared to directly fixing the mold and ejecting the workpiece. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a technical solution using a split mold, which uses a split mold that can automatically combine and separate to limit the workpiece during the forging process. After the forging is completed, the mold can be separated to avoid the workpiece from getting stuck. In fact, after each heating, a round of forging needs to be performed, but the number and time interval of each round of forging are not constant, and generally need to be flexibly adjusted according to the temperature conditions, which makes it extremely difficult to control when the mold is combined and when it is separated.

[0006] In order to solve this problem, the present invention creatively proposes a delayed semi-locking mechanism, which continuously maintains the air pressure in the transverse chamber through the air provided during each forging, so that as long as the continuous forging is short-interval, the transverse die will not automatically unlock and separate. After a round of forging is completed, the separation of the transverse die can be completed. At this time, the workpiece has the clamping conditions, so it can be easily taken away by an external clamping device and returned to the furnace or enter the next process.

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes a positioning mechanism for gear forging, including a delayed semi-locking mechanism, a press-sinking locking mechanism, a sliding split limiting mechanism and a lifting and forging mechanism, the delayed semi-locking mechanism includes a ratchet assembly, a telescopic locking assembly, a one-way air intake assembly and a delayed exhaust assembly, the ratchet assembly is arranged on the lifting and forging mechanism, the telescopic locking assembly is arranged on the press-sinking locking mechanism, the one-way air intake assembly is arranged in the telescopic locking assembly, and the delayed exhaust assembly is arranged in the telescopic locking assembly.

[0008] Furthermore, the press-sinking locking mechanism is arranged on the lifting and forging mechanism, and the sliding split limiting mechanism is arranged on the lifting and forging mechanism.

[0009] The pressing and sinking locking mechanism can close and lock the sliding split limiting mechanism during the forging process, so that the sliding split limiting mechanism can limit the workpiece during forging, and the delayed semi-locking mechanism has the function of slowly unlocking the pressing and sinking locking mechanism, and no matter how many single-round forgings are performed, the separation of the sliding split limiting mechanism will be completed after the last forging is completed.

[0010] Preferably, the ratchet assembly includes a vertical ratchet bar and a rack support frame, the vertical ratchet bar is fixedly connected to the forging base, the rack support frame is fixedly connected to the forging base, the vertical ratchet bar and the rack support frame are fixedly connected, and a ratchet portion is provided in a linear array on the vertical ratchet bar.

[0011] Through the cooperation between the telescopic teeth and the ratchet part, the locking block body can smoothly descend when under pressure, but cannot rise and rebound immediately after the pressure is removed, thereby avoiding unnecessary movement of the workpiece during multiple forging processes in a single round.

[0012] As a further preferred embodiment of the present invention, the telescopic locking assembly includes a special-shaped through box, a top bracket, a telescopic tooth and a retraction spring. The special-shaped through box is fixedly connected to the locking block body, and the special-shaped through box is composed of a transverse chamber and a longitudinal chamber. The top bracket is fixedly connected to the top of the longitudinal chamber. The telescopic tooth is slidably arranged in the transverse chamber. The retraction spring is arranged between the bottom of the telescopic tooth and the inside of the transverse chamber, and the telescopic tooth and the ratchet part cooperate with each other.

[0013] Through the confrontation between the retraction spring and the air pressure, when the air pressure in the transverse chamber is too high, the telescopic teeth will extend under the action of the air pressure and then combine with the vertical ratchet bar. When the internal air pressure of the transverse chamber is reduced to a certain level, the telescopic teeth will retract into the transverse chamber under the elastic force of the retraction spring.

[0014] Preferably, the one-way air intake assembly includes a fixed partition, an air intake piston, an air intake pressure rod and a piston return spring, the fixed partition is fixedly connected to the longitudinal chamber, the fixed partition is located between the transverse chamber and the longitudinal chamber, the air intake piston is snap-fitted and slidably arranged in the longitudinal chamber, the air intake pressure rod is fixedly connected to the air intake piston, the air intake pressure rod is snap-fitted and slidably arranged in the top bracket, and the piston return spring is arranged between the fixed partition and the air intake piston.

[0015] The interior of the special-shaped through-box is divided into two chambers, a transverse chamber and a longitudinal chamber, by a fixed partition. The longitudinal chamber has the characteristics of fast response and is easy to control. It can capture the lifting and lowering movement of the forging hammer during the forging process, thereby continuously maintaining the air pressure in the transverse chamber; while the transverse chamber has the characteristics of delayed response, avoiding the premature release of the locking state of the sliding split limit mechanism due to the rapid rebound of the telescopic teeth, thereby overcoming the technical contradiction that the air intake pressure rod must be both fast and slow when following the forging hammer movement.

[0016] As a further preferred embodiment of the present invention, the delayed exhaust assembly includes a one-way valve 1, a one-way valve 2 and a slow exhaust valve, the one-way valve 1 is arranged on the intake piston, and the one-way valve 1 can only allow gas to enter the longitudinal chamber from the outside, the one-way valve 2 is arranged on the fixed partition, and the one-way valve 2 can only allow gas to enter the transverse chamber from the longitudinal chamber, and the slow exhaust valve is arranged on the end face of the transverse chamber.

[0017] The flow direction of gas in the special-shaped through-box is cleverly designed through one-way valve 1, one-way valve 2 and slow exhaust valve, so that the longitudinal chamber can supply external gas into the transverse chamber continuously based on its own rapid response, while the gas in the transverse chamber can be slowly discharged. After a round of forging is completed, the sliding split limit mechanism is automatically unlocked.

[0018] Furthermore, the push-and-sink type locking mechanism comprises a lifting guide rail, a lifting slider and a locking block reset assembly, the lifting guide rail is fixedly connected to the forging base, the lifting slider is snap-fitted and slidably arranged on the lifting guide rail, and the locking block reset assembly is arranged on the lifting slider.

[0019] Preferably, the locking block reset assembly includes a locking block body, a lifting spring seat and a locking block reset spring, the locking block body is fixedly connected to the lifting slider, the locking block body is snap-fitted and slidably arranged in the locking stop groove, the locking block body is provided with a boss portion, and square grooves are also provided on both sides of the locking block body, the special-shaped through box body is fixedly connected to the square groove through a transverse chamber, the lifting spring seat is fixedly connected to the locking block body, and the locking block reset spring is arranged between the lifting spring seat and the forging base.

[0020] The locking block return spring can keep the locking block body moving upward, so that after the telescopic teeth retract, the locking block body without the blocking of the ratchet part can automatically rise, thereby completing the unlocking of the transverse mold.

[0021] Furthermore, the sliding split limiting mechanism includes a transverse guide rail, a transverse mold, a parting spring and a fixed spring seat, the transverse guide rail is fixedly connected to the forging base, the transverse mold is slidably arranged on the transverse guide rail, the transverse mold is symmetrically provided with two transverse molds, one end of the transverse mold is provided with a semicircular hole, and the other end of the transverse mold is provided with a avoidance groove, the fixed spring seat is fixedly connected to the forging base, and the parting spring is arranged between the fixed spring seat and the transverse mold.

[0022] The transverse moving die is a combined die. When the two transverse moving dies are combined in the middle position, the semicircular holes can form a complete circular space, which is used to limit the workpiece during the forging process. After the forging is completed, the workpiece can be removed from the transverse moving die by separating the transverse moving die, avoiding the embarrassing situation that the workpiece cannot be removed due to being stuck and having no clamping position.

[0023] Furthermore, the lifting forging mechanism includes a forging base and a forging arm, the forging base is symmetrically provided with locking grooves, and the forging arm is arranged on the side of the forging base.

[0024] Preferably, the lifting and forging mechanism also includes a forging hammer and a control pressure plate, the forging hammer is arranged at the end of the forging arm, the control pressure plate is arranged on the forging hammer, the control pressure plate is symmetrically provided with a beam pressing part, the beam pressing part is located above the boss part, and a cantilever pressing part is symmetrically provided on the outer side of the beam pressing part, and the cantilever pressing part is located above the intake pressure rod.

[0025] The control platen descends along with the forging hammer. During a round of forging, the locking block body can be pressed down to the specified position during the first forging, and the lateral die can be combined and locked at the same time. During each forging, the air intake pressure rod can be driven down to provide gas to the interior of the lateral chamber.

[0026] The beneficial effects achieved by the present invention using the above structure are as follows:

[0027] (1) The push-and-sink locking mechanism can close and lock the sliding split limit mechanism during the forging process, so that the sliding split limit mechanism can limit the workpiece during forging, while the delayed semi-locking mechanism has the function of slowly unlocking the push-and-sink locking mechanism. Regardless of the number of single-round forgings, the separation of the sliding split limit mechanism will be completed after the last forging is completed.

[0028] (2) Through the cooperation between the telescopic teeth and the ratchet part, the locking block body can smoothly descend when under pressure, but cannot immediately rise and rebound after the pressure is removed, thereby avoiding unnecessary movement of the workpiece during multiple forging processes in a single round.

[0029] (3) Through the confrontation between the retraction spring and the air pressure, when the air pressure in the transverse chamber is too high, the telescopic teeth will extend under the action of the air pressure and then combine with the vertical ratchet bar. When the internal air pressure of the transverse chamber is reduced to a certain level, the telescopic teeth will retract into the transverse chamber under the elastic force of the retraction spring.

[0030] (4) The interior of the special-shaped through-box is divided into two chambers, a transverse chamber and a longitudinal chamber, by a fixed partition. The longitudinal chamber has the characteristics of rapid response and is easy to control. It can capture the lifting and lowering movement of the forging hammer during the forging process, thereby continuously maintaining the air pressure in the transverse chamber; while the transverse chamber has the characteristics of delayed response, avoiding the premature release of the locking state of the sliding split limit mechanism due to the rapid rebound of the telescopic teeth; thereby overcoming the technical contradiction that the air intake pressure rod must be both fast and slow when following the forging hammer.

[0031] (5) The flow direction of gas in the special-shaped through-box is cleverly designed through one-way valve 1, one-way valve 2 and slow exhaust valve, so that the longitudinal chamber can supply external gas to the transverse chamber continuously based on its own rapid response, while the gas in the transverse chamber can be slowly discharged. After a round of forging is completed, the sliding split limit mechanism is automatically unlocked.

[0032] (6) The locking block return spring can keep the locking block body moving upward, so that after the telescopic teeth retract, the locking block body without the obstruction of the ratchet part can automatically rise, thereby completing the unlocking of the transverse mold.

[0033] (7) The transverse moving die is a combined die. When the two transverse moving dies are combined in the middle position, the semicircular holes can form a complete circular space, which is used to limit the position of the workpiece during the forging process. After the forging is completed, the workpiece can be removed from the transverse moving die by separating the transverse moving die, avoiding the embarrassing situation that the workpiece cannot be removed due to being stuck and having no clamping position.

[0034] (8) The control platen descends along with the descent of the forging hammer. During a round of forging, the locking block body can be pressed down to the specified position during the first forging, and the lateral die can be engaged and locked at the same time. During each forging, the air intake pressure rod can be driven down to provide gas to the interior of the lateral chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A three-dimensional diagram of a positioning mechanism for gear forging proposed by the present invention;

[0036] Figure 2 This is a front view of a positioning mechanism for gear forging proposed by the present invention;

[0037] Figure 3This is a left side view of a positioning mechanism for gear forging proposed by the present invention;

[0038] Figure 4 A top view of a positioning mechanism for gear forging proposed by the present invention;

[0039] Figure 5 for Figure 2 A cross-sectional view along the cutting line AA;

[0040] Figure 6 for Figure 3 A cross-sectional view along the cutting line BB;

[0041] Figure 7 for Figure 3 A cross-sectional view along the cutting line CC;

[0042] Figure 8 for Figure 2 A cross-sectional view along the cutting line DD;

[0043] Fig. 9 An exploded view of a positioning mechanism for gear forging proposed by the present invention;

[0044] Fig.10 for Figure 7 A partial enlarged view of point Ⅰ in the middle;

[0045] Fig.11 for Figure 8 A partial enlarged view of the middle II;

[0046] Fig.12 for Fig. 9 A partial enlarged view of point III in the middle.

[0047] Among them, 1. Delayed semi-locking mechanism, 2. Press-sinking locking mechanism, 3. Sliding split limit mechanism, 4. Lifting and forging mechanism, 5. Ratchet assembly, 6. Telescopic locking assembly, 7. One-way air intake assembly, 8. Delayed exhaust assembly, 9. Vertical ratchet bar, 10. Rack support frame, 11. Special-shaped through-box, 12. Top bracket, 13. Telescopic teeth, 14. Retraction spring, 15. Fixed partition, 16. Intake piston, 17. Intake pressure rod, 18. Piston return spring, 19. One-way valve 1, 20. One-way valve 2, 21. Slow exhaust valve, 22. Ratchet portion, 23. Horizontal chamber, 24. Longitudinal chamber, 25. Lifting guide rail, 26. Lifting slider, 27. Locking block reset assembly, 28. Locking block body, 29. Lifting spring seat, 30. Locking block reset spring, 31. Boss portion, 32. Transverse guide rail, 33. Transverse mold, 34. Parting spring, 35. Fixed spring seat, 36. Semicircular hole, 37. Avoidance groove, 38. Forging base, 39. Forging arm, 40. Forging hammer, 41. Control pressure plate, 42. Locking stop groove, 43. Beam pressing portion, 44. Cantilever pressing portion.

[0048] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0051] like Figure 1 to Figure 12As shown, the present invention proposes a positioning mechanism for gear forging, including a delayed semi-locking mechanism 1, a press-sinking locking mechanism 2, a sliding split limiting mechanism 3 and a lifting forging mechanism 4, the delayed semi-locking mechanism 1 includes a ratchet assembly 5, a telescopic locking assembly 6, a one-way air intake assembly 7 and a delayed exhaust assembly 8, the ratchet assembly 5 is arranged on the lifting forging mechanism 4, the telescopic locking assembly 6 is arranged on the press-sinking locking mechanism 2, the one-way air intake assembly 7 is arranged in the telescopic locking assembly 6, and the delayed exhaust assembly 8 is arranged in the telescopic locking assembly 6.

[0052] The pressing and sinking locking mechanism 2 is arranged on the lifting and forging mechanism 4 , and the sliding and split limiting mechanism 3 is arranged on the lifting and forging mechanism 4 .

[0053] By pressing and sinking the locking mechanism 2, the sliding split limiting mechanism 3 can be closed and locked during the forging process, so that the sliding split limiting mechanism 3 can limit the workpiece during forging, and the delayed semi-locking mechanism 1 has the function of slowly unlocking the pressing and sinking locking mechanism 2, and no matter how many single-round forgings are performed, the separation of the sliding split limiting mechanism 3 will be completed after the last forging is completed.

[0054] The lifting forging mechanism 4 includes a forging base 38 and a forging arm 39 . The forging base 38 is symmetrically provided with locking grooves 42 . The forging arm 39 is arranged on the side of the forging base 38 .

[0055] The lifting and forging mechanism 4 also includes a forging hammer 40 and a control pressure plate 41. The forging hammer 40 is arranged at the end of the forging arm 39, and the control pressure plate 41 is arranged on the forging hammer 40. A crossbeam pressing portion 43 is symmetrically arranged on the control pressure plate 41, and the crossbeam pressing portion 43 is located above the boss portion 31. A cantilever pressing portion 44 is symmetrically arranged on the outer side of the crossbeam pressing portion 43, and the cantilever pressing portion 44 is located above the intake pressure rod 17.

[0056] The control plate 41 descends along with the forging hammer 40. During a round of forging, the locking block body 28 can be pressed down to a specified position during the first forging, and the transverse die 33 can be engaged and locked. During each forging, the air intake pressure rod 17 can be driven down to provide gas to the interior of the transverse chamber 23.

[0057] The sliding split limiting mechanism 3 includes a transverse guide rail 32, a transverse mold 33, a parting spring 34 and a fixed spring seat 35. The transverse guide rail 32 is fixedly connected to the forging base 38. The transverse mold 33 is slidably arranged on the transverse guide rail 32. The transverse mold 33 is symmetrically provided with two transverse molds, one end of which is provided with a semicircular hole 36, and the other end of the transverse mold 33 is provided with a avoidance groove 37. The fixed spring seat 35 is fixedly connected to the forging base 38, and the parting spring 34 is arranged between the fixed spring seat 35 and the transverse mold 33.

[0058] The transverse moving die 33 is a combined die. When the two transverse moving dies 33 are combined in the middle position, the semicircular holes 36 can form a complete circular space, which is used to limit the workpiece during the forging process. After the forging is completed, the workpiece can be removed from the transverse moving die 33 by separating the transverse moving die 33, avoiding the embarrassing situation that the workpiece cannot be removed due to being stuck and having no clamping position.

[0059] The push-and-sink locking mechanism 2 includes a lifting guide rail 25, a lifting slider 26 and a locking block reset assembly 27. The lifting guide rail 25 is fixedly connected to the forging base 38, the lifting slider 26 is slidably engaged on the lifting guide rail 25, and the locking block reset assembly 27 is arranged on the lifting slider 26.

[0060] The locking block reset assembly 27 includes a locking block body 28, a lifting spring seat 29 and a locking block reset spring 30. The locking block body 28 is fixedly connected to the lifting slider 26. The locking block body 28 is slidably engaged in the locking stop groove 42. A boss portion 31 is provided on the locking block body 28. Square grooves are also provided on both sides of the locking block body 28. The special-shaped through box 11 is fixedly connected to the square groove through the transverse chamber 23. The lifting spring seat 29 is fixedly connected to the locking block body 28. The locking block reset spring 30 is arranged between the lifting spring seat 29 and the forging base 38.

[0061] The locking block return spring 30 can keep the locking block body 28 moving upward, so that after the telescopic teeth 13 retract, the locking block body 28 without the obstruction of the ratchet part 22 can automatically rise, thereby completing the unlocking of the transverse mold 33.

[0062] The ratchet assembly 5 includes a vertical ratchet bar 9 and a rack support frame 10. The vertical ratchet bar 9 is fixedly connected to the forging base 38. The rack support frame 10 is fixedly connected to the forging base 38. The vertical ratchet bar 9 and the rack support frame 10 are fixedly connected. A ratchet portion 22 is provided in a linear array on the vertical ratchet bar 9.

[0063] Through the cooperation between the telescopic teeth 13 and the ratchet portion 22, the locking block body 28 can descend smoothly when under pressure, but cannot rise and rebound immediately after the pressure is removed, thereby avoiding unnecessary movement of the workpiece during multiple forging processes in a single round.

[0064] The telescopic locking assembly 6 includes a special-shaped through-box body 11, a top bracket 12, a telescopic tooth 13 and a retraction spring 14. The special-shaped through-box body 11 is fixedly connected to the locking block body 28. The special-shaped through-box body 11 is composed of a transverse chamber 23 and a longitudinal chamber 24. The top bracket 12 is fixedly connected to the top of the longitudinal chamber 24. The telescopic tooth 13 is slidably arranged in the transverse chamber 23. The retraction spring 14 is arranged between the bottom of the telescopic tooth 13 and the inside of the transverse chamber 23. The telescopic tooth 13 and the ratchet part 22 cooperate with each other.

[0065] Through the confrontation between the retraction spring 14 and the air pressure, when the air pressure in the transverse chamber 23 is too high, the telescopic teeth 13 will extend under the action of the air pressure and then combine with the vertical ratchet bar 9. When the internal air pressure of the transverse chamber 23 is reduced to a certain level, the telescopic teeth 13 will retract into the transverse chamber 23 under the elastic force of the retraction spring 14.

[0066] The one-way air intake assembly 7 includes a fixed partition 15, an air intake piston 16, an air intake pressure rod 17 and a piston return spring 18. The fixed partition 15 is fixedly connected to the longitudinal chamber 24. The fixed partition 15 is located between the transverse chamber 23 and the longitudinal chamber 24. The air intake piston 16 is snap-fitted and slidably arranged in the longitudinal chamber 24. The air intake pressure rod 17 is fixedly connected to the air intake piston 16. The air intake pressure rod 17 is snap-fitted and slidably arranged in the top bracket 12. The piston return spring 18 is arranged between the fixed partition 15 and the air intake piston 16.

[0067] The interior of the special-shaped through box 11 is divided into two chambers, a transverse chamber 23 and a longitudinal chamber 24, by a fixed partition 15. The longitudinal chamber 24 has the characteristics of rapid response and is easy to control. It can capture the lifting and lowering movement of the forging hammer 40 during the forging process, thereby continuously maintaining the air pressure in the transverse chamber 23; while the transverse chamber 23 has the characteristics of delayed response to avoid premature release of the locking state of the sliding split limit mechanism 3 due to the rapid rebound of the telescopic teeth 13; thereby overcoming the technical contradiction that the air intake pressure rod 17 must be both fast and slow when moving with the forging hammer 40.

[0068] The delayed exhaust assembly 8 includes a one-way valve 19, a one-way valve 20 and a slow exhaust valve 21. The one-way valve 19 is arranged on the intake piston 16, and the one-way valve 19 can only allow gas to enter the longitudinal chamber 24 from the outside. The one-way valve 20 is arranged on the fixed partition 15, and the one-way valve 20 can only allow gas to enter the transverse chamber 23 from the longitudinal chamber 24. The slow exhaust valve 21 is arranged on the end face of the transverse chamber 23.

[0069] The flow direction of the gas in the special-shaped through-box 11 is cleverly designed through the one-way valve 19, the one-way valve 20 and the slow exhaust valve 21, so that the longitudinal chamber 24 can supply external gas into the transverse chamber 23 continuously based on its own rapid response, and the gas in the transverse chamber 23 can be slowly discharged. After a round of forging is completed, the sliding split limit mechanism 3 is automatically unlocked.

[0070] When in use, the user first needs to put the heated blank into the approximate center of the two transverse moving dies 33, that is, in the middle of the semicircular hole 36. At this time, the transverse moving dies 33 are in a separated state. During the descent of the forging hammer 40, the cantilever pressing portion 44 first presses the air inlet pressure rod 17. Through the descent of the air inlet piston 16, the gas in the longitudinal chamber 24 is blown into the transverse chamber 23 through the one-way valve 20. At this time, the internal air pressure of the transverse chamber 23 increases and the telescopic teeth 13 extend.

[0071] Then, the air intake pressure rod 17 remains in the depressed state. When the cross beam pressing portion 43 contacts the boss portion 31, the retraction spring 14 descends and brings the locking block body 28 down together. During the process of the locking block body 28 descending along the lifting guide rail 25 and the lifting slider 26, the telescopic teeth 13 contact the ratchet portion 22. At this time, although the telescopic teeth 13 are in the extended state, they can still frequently retract when they abut against the ratchet portion 22 under the strong downward pressure of the forging hammer 40.

[0072] When the locking block body 28 contacts the transverse moving die 33, a transverse force is also applied to the transverse moving die 33, so that the two transverse moving dies 33 move synchronously transversely toward the middle position along the transverse moving guide rail 32 until the two transverse moving dies 33 contact and combine. As the locking block body 28 continues to descend, when the locking block body 28 enters the locking stop groove 42, the locking block body 28 can be laterally limited by the locking stop groove 42, and the transverse moving die 33 can be fully locked with high strength. At this time, even if the workpiece exerts a large pressure on the side wall of the semicircular hole 36 during forging, the transverse moving die 33 will not be displaced.

[0073] In the process of the transverse moving dies 33 approaching each other, the position of the workpiece will also be adjusted. After the locking block body 28 drops to the limit position, the forging hammer 40 retracts. However, since the telescopic teeth 13 still remain extended at this time, the locking block body 28 will not rise with the rise of the forging hammer 40, and the transverse moving die 33 will not be separated.

[0074] Since the gas in the transverse chamber 23 is discharged very slowly through the slow exhaust valve 21, during the rising process of the forging hammer 40, the tension of the retraction spring 14 is not enough to overcome the air pressure to retract the telescopic tooth 13. At this time, only the air intake piston 16 and the air intake pressure rod 17 will quickly rise and reset under the elastic force of the piston return spring 18. In this stage, the longitudinal chamber 24 generates negative pressure, but the gas in the transverse chamber 23 cannot enter the longitudinal chamber 24, so the external gas will enter the longitudinal chamber 24 through the one-way valve 19;

[0075] When the forging hammer 40 falls again, the cantilever pressing part 44 will press the air inlet pressure rod 17 down again. At this time, the air in the longitudinal chamber 24 will enter the transverse chamber 23, causing the air pressure in the transverse chamber 23 to increase again. Therefore, in the same round of multiple forging processes, no matter how many forging times, as long as the time interval between each pressing is within a suitable range, the telescopic teeth 13 will remain extended, and the transverse mold 33 will not separate.

[0076] Since the intake piston 16 does not move to a position in direct contact with the fixed partition 15 during the downward pressing process of the intake pressure rod 17, there is actually a limit air pressure in the longitudinal chamber 24. If the exhaust speed is too slow and the air pressure in the transverse chamber 23 reaches this exhaust pressure, the gas in the longitudinal chamber 24 will not enter the transverse chamber 23. If the air pressure in the transverse chamber 23 is lower than this limit air pressure, the gas in the longitudinal chamber 24 will enter the transverse chamber 23.

[0077] After a round of forging is completed, since the slow exhaust valve 21 continues to exhaust gas, but the gas in the longitudinal chamber 24 has stopped supplying to the transverse chamber 23, the air pressure in the transverse chamber 23 will continue to decrease. However, when the retraction spring 14 is sufficient to overcome the air pressure and pull the telescopic tooth 13 to retract, the delayed semi-locking mechanism 1 cannot lock the position of the locking block body 28. At this time, the locking block body 28 will rise under the elastic force of the locking block reset spring 30. When the locking block body 28 leaves the transverse mold 33, the transverse mold 33 will be separated and reset under the elastic force of the parting spring 34.

[0078] After the transverse moving molds 33 are separated, the blank will generally be separated from both transverse moving molds 33. However, if the blank is still adhered to one of the transverse moving molds 33, the transverse moving mold 33 cannot wrap the blank at all angles at this time, and the external clamping device can easily remove the blank.

[0079] The opening of the slow exhaust valve 21 can be adjusted by rotating the slow exhaust valve 21 , so that the exhaust speed of the slow exhaust valve 21 can be regulated to cope with forging requirements of different frequencies.

[0080] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0081] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A positioning mechanism for gear forging, characterized in that: The invention comprises a delayed semi-locking mechanism (1), a pressing and sinking locking mechanism (2), a sliding split limiting mechanism (3) and a lifting and forging mechanism (4), wherein the delayed semi-locking mechanism (1) comprises a ratchet assembly (5), a telescopic locking assembly (6), a one-way air intake assembly (7) and a delayed exhaust assembly (8), wherein the ratchet assembly (5) is arranged on the lifting and forging mechanism (4), the telescopic locking assembly (6) is arranged on the pressing and sinking locking mechanism (2), the one-way air intake assembly (7) is arranged in the telescopic locking assembly (6), and the delayed exhaust assembly (8) is arranged in the telescopic locking assembly (6); The pressing and sinking locking mechanism (2) is arranged on the lifting and forging mechanism (4), and the sliding split limiting mechanism (3) is arranged on the lifting and forging mechanism (4); The lifting forging mechanism (4) comprises a forging base (38) and a forging arm (39); the forging base (38) is symmetrically provided with locking grooves (42); and the forging arm (39) is arranged on a side of the forging base (38); The ratchet assembly (5) comprises a vertical ratchet bar (9) and a rack support frame (10), the vertical ratchet bar (9) is fixedly connected to a forging base (38), the rack support frame (10) is fixedly connected to a forging base (38), the vertical ratchet bar (9) and the rack support frame (10) are fixedly connected, and a ratchet portion (22) is provided in a linear array on the vertical ratchet bar (9); The telescopic locking assembly (6) comprises a special-shaped through-box (11), a top bracket (12), a telescopic tooth (13) and a retraction spring (14); the special-shaped through-box (11) is fixedly connected to a locking block body (28); the special-shaped through-box (11) is composed of a transverse chamber (23) and a longitudinal chamber (24); the top bracket (12) is fixedly connected to the top of the longitudinal chamber (24); the telescopic tooth (13) is slidably arranged in the transverse chamber (23); the retraction spring (14) is arranged between the bottom of the telescopic tooth (13) and the inside of the transverse chamber (23); the telescopic tooth (13) and the ratchet portion (22) cooperate with each other.

2. A positioning mechanism for gear forging according to claim 1, characterized in that: The one-way air intake assembly (7) comprises a fixed baffle (15), an air intake piston (16), an air intake pressure rod (17) and a piston return spring (18); the fixed baffle (15) is fixedly connected to the longitudinal chamber (24); the fixed baffle (15) is located between the transverse chamber (23) and the longitudinal chamber (24); the air intake piston (16) is slidably mounted in the longitudinal chamber (24); the air intake pressure rod (17) is fixedly connected to the air intake piston (16); the air intake pressure rod (17) is slidably mounted in the top bracket (12); and the piston return spring (18) is disposed between the fixed baffle (15) and the air intake piston (16).

3. A positioning mechanism for gear forging according to claim 2, characterized in that: The delayed exhaust component (8) comprises a one-way valve (19), a one-way valve (20) and a slow exhaust valve (21), wherein the one-way valve (19) is arranged on the intake piston (16), and the one-way valve (19) can only allow gas to enter the longitudinal chamber (24) from the outside, the one-way valve (20) is arranged on the fixed partition (15), and the one-way valve (20) can only allow gas to enter the transverse chamber (23) from the longitudinal chamber (24), and the slow exhaust valve (21) is arranged on the end surface of the transverse chamber (23).

4. A positioning mechanism for gear forging according to claim 3, characterized in that: The push-and-sink type locking mechanism (2) comprises a lifting guide rail (25), a lifting slider (26) and a locking block reset assembly (27); the lifting guide rail (25) is fixedly connected to a forging base (38); the lifting slider (26) is slidably engaged on the lifting guide rail (25); and the locking block reset assembly (27) is arranged on the lifting slider (26).

5. A positioning mechanism for gear forging according to claim 4, characterized in that: The locking block reset assembly (27) includes a locking block body (28), a lifting spring seat (29) and a locking block reset spring (30), wherein the locking block body (28) is fixedly connected to the lifting slider (26), the locking block body (28) is slidably engaged in the locking stop groove (42), a boss portion (31) is provided on the locking block body (28), and square grooves are also provided on both sides of the locking block body (28), the special-shaped through box (11) is fixedly connected to the square groove through the transverse chamber (23), the lifting spring seat (29) is fixedly connected to the locking block body (28), and the locking block reset spring (30) is provided between the lifting spring seat (29) and the forging base (38).

6. A positioning mechanism for gear forging according to claim 5, characterized in that: The sliding split limiting mechanism (3) comprises a transverse guide rail (32), a transverse die (33), a parting spring (34) and a fixed spring seat (35); the transverse guide rail (32) is fixedly connected to a forging base (38); the transverse die (33) is slidably engaged with the transverse guide rail (32); two transverse dies (33) are symmetrically provided; one end of the transverse die (33) is provided with a semicircular hole (36); the other end of the transverse die (33) is provided with a avoidance groove (37); the fixed spring seat (35) is fixedly connected to the forging base (38); and the parting spring (34) is provided between the fixed spring seat (35) and the transverse die (33).

7. A positioning mechanism for gear forging according to claim 6, characterized in that: The lifting and forging mechanism (4) further comprises a forging hammer (40) and a control pressing plate (41), wherein the forging hammer (40) is arranged at the end of the forging arm (39), and the control pressing plate (41) is arranged on the forging hammer (40), and a crossbeam pressing portion (43) is symmetrically arranged on the control pressing plate (41), and the crossbeam pressing portion (43) is located above the boss portion (31), and a cantilever pressing portion (44) is symmetrically arranged on the outer side of the crossbeam pressing portion (43), and the cantilever pressing portion (44) is located above the intake pressure rod (17).

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