High-speed hot die forging press clutch precision guidance device and process method

Abstract

The high-speed hot die forging press clutch precision guidance device comprises a clutch, a phenolic aldehyde laminated cloth ring guide rail is arranged between a clutch piston and a clutch piston cover in the radial circumferential direction, and the clutch piston slides relative to the clutch piston cover in a matched mode through the phenolic aldehyde laminated cloth ring guide rail; the clutch pressure plate comprises a pressure plate body and a protruding guide plate, self-lubricating guide plates are arranged between the two sides of the protruding guide plate and the flywheel guide groove in a matched mode, the clutch pressure plate slides relative to the flywheel in a matched mode through the self-lubricating guide plates, and the main guide clearance fit condition is that (phi A-phi a) / phi a = 0.00045-0.00055. And the auxiliary guide clearance fit condition is as follows: (Phi G-Phi g) / Phi B is equal to 0.00075-0.00085. The problems that the clutch cannot be opened to cause an accident due to thermal temperature rise expansion of the high-speed hot die forging press during long-time operation and abnormal sound is generated when the clutch is started and operated due to simple reservation and increase of a fit clearance are solved, and reliable, stable and effective operation of the high-speed hot die forging press and a precision clutch of an automatic line under the condition of large temperature rise is realized.

Description

Technical field:

[0001] The invention relates to the technical field of metal forming machine tool industry mother machine manufacturing, in particular to a high-speed hot die forging press clutch precision guidance device and a process method. Background technology:

[0002] The clutch is an indispensable transmission component of hot die forging press. At present, the clutch of large hot die forging press mainly adopts friction block structure (such as Fig. 9 As shown in the figure, the clutch is controlled by air pressure and spring to connect and disconnect the entire transmission system. The clutch and brake are controlled by pneumatic interlocking. When the hot die forging press is started, the electromagnetic double valve and the two-position three-way electromagnetic valve are activated at the same time, and the compressed air quickly enters the clutch through the double valve and the brake disc is disengaged. Then, the clutch ventilation is combined to drive the transmission mechanism to operate. When the hot die forging press is stopped, the double valve and the electromagnetic valve are activated at the same time, the clutch cylinder is exhausted quickly, the friction disc is disengaged, the power transmission is cut off, and the flywheel is idling.

[0003] When the high-speed hot die forging press is linked with the robot to automatically feed the material in a single stroke, the clutch piston moves to push the clutch pressure plate to apply friction to the friction block in the clutch friction plate on the flywheel friction plate to achieve continuous engagement and disengagement of the clutch. As the clutch works at high frequency and for a long time, and the internal space of the clutch is relatively closed, it is impossible to form an effective rapid circulation of air to the outside, resulting in continuous temperature rise and thermal expansion (i.e., metal thermal expansion coefficient) of the clutch friction block, flywheel friction plate, clutch pressure plate and clutch piston, which seriously affects the relative matching clearance between the clutch piston and the clutch piston cover, and the clutch pressure plate and the flywheel, hinders the reciprocating relative sliding of the clutch piston, and also causes over-positioning interference. Therefore, when the existing hot die forging press is running at high speed and for a long time, the clutch cannot be opened due to temperature rise and thermal expansion, resulting in accidents. The existing technology usually adopts increasing the reserved matching clearance to solve the problem of thermal expansion of the clutch, but this will cause abnormal noise and reduced processing accuracy when the clutch is started, which seriously affects the use effect. With the advent of the global low-carbon, energy-saving and digital economy, efficient, precise and green manufacturing has become a new quality productivity. In summary, the technical problem of uncontrolled clutch temperature rise is increasingly restricting the development trend of high-speed hot die forging presses and automatic lines for precise operation.

[0004] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Summary of the invention:

[0005] The purpose of the present invention is to solve the problems in the prior art that the clutch of a high-speed hot die forging press machine continues to heat up during long-term operation, resulting in the elimination of the relative matching clearance between the clutch parts or mutual interference, resulting in over-positioning and quality accidents that make it impossible to open the clutch, and abnormal noises often occur during initial startup and operation. A precision guidance device and process method for the clutch of a high-speed hot die forging press machine are provided, and targeted precision guidance design is carried out for the root causes of the abnormal noise of the clutch and the root causes of thermal expansion and locking due to temperature rise, so as to realize reliable, stable and effective operation of the precision clutch of the high-speed hot die forging press and the automatic line under the condition of large temperature rise.

[0006] The present invention achieves the above-mentioned purpose by adopting the following technical solutions:

[0007] A high-speed hot die forging press clutch precision guiding device comprises a clutch arranged on a transmission shaft, the clutch comprising a flywheel, a flywheel friction disc, a friction block, a clutch friction disc, a clutch pressure plate, a clutch piston, and a clutch piston cover, a plurality of clutch pressure plate holes are evenly spaced on the clutch pressure plate in a circumferential direction, a plurality of clutch spring pins are symmetrically arranged on the clutch piston cover, and the clutch pressure plate is sleeved on the clutch spring pins through the clutch pressure plate holes; a phenolic laminated cloth ring guide rail is provided between the clutch piston and the clutch piston cover in a radial circumferential direction, and the clutch piston slides relative to the clutch piston cover through the phenolic laminated cloth ring guide rail; the clutch pressure plate comprises a pressure plate body, a plurality of raised guide plates are symmetrically spaced on the pressure plate body in a circumferential direction, a plurality of flywheel guide grooves are evenly and symmetrically arranged on the corresponding flywheel, self-lubricating guide plates are provided between the two sides of the raised guide plates and the flywheel guide grooves, and the clutch pressure plate slides relative to the flywheel guide grooves through the self-lubricating guide plates.

[0008] The phenolic laminated cloth ring guide rails are evenly spaced and arranged on the circumferential side wall of the clutch piston.

[0009] A mounting groove is provided on the circumferential side wall of the clutch piston, and a plurality of phenolic laminated cloth ring guide rails are provided on the mounting groove at intervals along the circumferential direction. The phenolic laminated cloth ring guide rails are fastened to the clutch piston by screws and pins A.

[0010] The pressure plate body and the raised guide plate are integrally formed.

[0011] Self-lubricating guide plates are respectively provided on the two side walls of the raised guide plate, and the self-lubricating guide plates are fastened to the raised guide plate by screws B.

[0012] The high-speed hot die forging press clutch precision guidance process method includes the clutch precision guidance device as described above. Under the dual factors of temperature rise, thermal expansion and abnormal noise, the main guide clearance matching conditions between the clutch piston cover and the clutch piston are as follows:

[0013] (ΦA-Φa) / Φa=0.00045~0.00055;

[0014] The auxiliary guide clearance matching conditions between the clutch spring pin and the clutch pressure plate hole are:

[0015] (ΦG-Φg) / ΦB=0.00075~0.00085;

[0016] Among them, ΦA represents the inner hole diameter of the clutch piston cover and the clutch piston; Φa represents the outer circle diameter formed by the clutch piston and the phenolic laminated cloth ring guide; ΦG represents the clutch pressure plate hole diameter; Φg represents the clutch spring pin diameter; ΦB represents the center line diameter of the clutch pressure plate hole.

[0017] The present invention adopts the above technical solution, which can bring the following beneficial effects:

[0018] By adding a number of phenolic laminated cloth ring guides on the circumferential side wall of the clutch piston at even intervals and effectively controlling the sliding fit with the inner side of the clutch piston cover and the double clearance between the clutch spring pin and the clutch pressure plate hole, the phenolic laminated cloth ring guide has low friction coefficient, heat resistance, impact resistance, noise reduction and elasticity, combined with the use of the outer end guide plate of the clutch pressure plate to reduce the sliding friction coefficient, and optimizing the fitting clearance between the clutch piston cover and the clutch piston sliding guide, and between the clutch spring pin and the clutch pressure plate hole through test detection, the high-speed hot die forging press has effectively solved the problem of the relative fitting clearance between the clutch piston and the clutch piston cover, and the clutch pressure plate and the flywheel guide groove being eliminated or interfering with each other due to thermal expansion during long-term operation, resulting in over-positioning and causing the clutch to be unable to open, and the problem of simply reserving and increasing the fitting clearance will cause abnormal noise when the clutch is started, so as to achieve reliable, stable and effective operation of the precision clutch of the high-speed hot die forging press and the automatic line under the condition of large temperature rise. Description of the drawings:

[0019] Figure 1 It is a structural schematic diagram of the clutch precision guidance device of the present invention;

[0020] Figure 2 for Figure 1 A partial enlarged view of the X part;

[0021] Figure 3 It is a schematic structural diagram of the clutch piston of the present invention;

[0022] Figure 4 for Figure 3 A partial enlarged view of the Y portion;

[0023] Figure 5 It is a schematic structural diagram of the phenolic laminated cloth ring guide rail of the present invention;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the clutch piston of the present invention;

[0025] Figure 7 for Figure 1 AA section view in the figure;

[0026] Figure 8 It is a schematic structural diagram of the clutch pressure plate of the present invention;

[0027] Fig. 9 It is a structural schematic diagram of an existing clutch;

[0028] In the figure, 1, transmission shaft, 2, flywheel, 3, flywheel friction plate, 4, friction block, 5, clutch friction plate, 6, clutch pressure plate, 601, pressure plate body, 602, raised guide plate, 7, clutch piston, 8, clutch piston cover, 9, clutch pressure plate hole, 10, clutch spring pin, 11, phenolic laminated cloth ring guide rail, 12, flywheel guide groove, 13, self-lubricating guide plate, 14, mounting groove, 15, screw and pin A, 16, screw B, 17, cylindrical roller bearing, 18, pressure cover, 19, vent hole, 20, buffer block, 21, Y-type sealing ring, 22, flywheel avoidance hole, 23, spring, 24, washer, 25, slotted hexagonal nut, 26, clutch, 27, brake. Specific implementation method:

[0029] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0031] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0032] In the present invention, the terms "radial", "axial", "A", "B", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the position of the indicated technical features.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "provided with", "set", "connected", "connected" and the like should be understood in a broad sense. For example, "provided with" and "set" can mean fixed installation, detachable installation, or integrated; "connected" can mean direct connection or connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1-8 As shown, a high-speed hot die forging press clutch precision guidance device comprises a clutch 26 arranged on a transmission shaft 1, wherein the clutch 26 comprises a flywheel 2, a flywheel friction disc 3, a friction block 4, a clutch friction disc 5, a clutch pressure plate 6, a clutch piston 7 and a clutch piston cover 8, wherein the flywheel 2 is rotatably arranged on the transmission shaft 1 through a cylindrical roller bearing 17, a clutch friction disc 5 is arranged at one end of the transmission shaft 1, and a brake 27 is arranged at the other end, a plurality of friction blocks 4 are arranged at intervals along the circumferential direction on the clutch friction disc 5, and the friction blocks 4 are arranged to slide axially, and the clutch friction disc 5 is connected to the transmission shaft 1 through a key, a clutch piston cover 8 is arranged on the outer wall of the flywheel 2, a clutch piston 7 is arranged in the clutch piston cover 8, a pressure cover 18 is arranged on the clutch piston cover 8, a vent hole 19 is arranged on the pressure cover 18, and a clutch pressure plate is arranged on the inner wall of the clutch piston 7 6, a buffer block 20 is provided on the outer wall, a Y-shaped sealing ring 21 is also provided between the clutch piston 7 and the clutch piston cover 8, a plurality of clutch pressure plate holes 9 are provided on the clutch pressure plate 6 at intervals along the circumferential direction, and a plurality of clutch spring pins 10 are symmetrically and evenly provided on the corresponding clutch piston cover 8, the clutch pressure plate 6 is sleeved on the clutch spring pin 10 through the clutch pressure plate hole 9, a flywheel avoidance hole 22 is provided on the flywheel 2 to avoid interference with the clutch spring pin 10, and a spring 23, a washer 24 and a slotted hexagonal nut 25 are provided on the clutch spring pin 10; in actual application of the existing clutch, compressed air is quickly introduced into the inner cavity of the clutch piston cover 8 through the electromagnetic double valve and the rotary joint, and the clutch piston 7 is pushed to drive the clutch pressure plate 6 to be combined with the friction block 4 and the flywheel friction plate 3 into one, and at the same time the brake 27 is disengaged, and the clutch is combined to drive the transmission mechanism to operate. The clutch 26 is frequently engaged and disengaged, and the clutch pressure plate 6, friction block 4 and flywheel friction plate 3 generate heat and the temperature rises rapidly. The maximum temperature rise exceeds 60°C and can reach 95°C. The heat is conducted to the clutch piston 7 through the clutch pressure plate 6, resulting in the disappearance of the sliding fit clearance between the clutch piston cover 8 and the clutch piston 7, and between the raised guide plate 602 at the outer end of the clutch pressure plate 6 and the flywheel guide groove 12, causing the clutch 26 to be unable to open and an accident to occur. If the reserved fit clearance is unilaterally increased, it will cause abnormal noise problems when the clutch 26 starts to start running.

[0035] A phenolic laminated cloth ring guide rail 11 is provided between the clutch piston 7 and the clutch piston cover 8 in the radial circumferential direction, and the clutch piston 7 slides relative to the clutch piston cover 8 through the phenolic laminated cloth ring guide rail 11; the clutch pressure plate 6 includes a pressure plate body 601, and a plurality of raised guide plates 602 are symmetrically arranged at intervals along the circumferential direction on the pressure plate body 601, and a plurality of flywheel guide grooves 12 are evenly and symmetrically arranged on the corresponding flywheel 2, and self-lubricating guide plates 13 are provided between the two sides of the raised guide plates 602 and the flywheel guide grooves 12, and the clutch pressure plate 6 slides relative to the flywheel guide grooves 12 through the self-lubricating guide plates 16. The present application has been subjected to basic theoretical analysis and experimental research and testing to form the above-mentioned innovative technical scheme, which utilizes the low friction coefficient between the phenolic laminated cloth ring guide rail pairs, and has the characteristics of heat resistance, impact resistance and noise reduction, and cooperates with the raised guide plate 602 at the outer end of the clutch pressure plate 6 to apply a self-lubricating guide plate 13 which also has a reduced sliding friction coefficient, to solve the problem that the high-speed hot die forging press will cause the relative matching clearance between the clutch piston 7 and the clutch piston cover 8, and the raised guide plate 602 at the outer end of the clutch pressure plate 6 and the flywheel guide groove 12 to be eliminated or interfere with each other due to thermal expansion during long-term operation, resulting in over-positioning, causing the clutch 26 to be unable to open and causing an accident, and simply reserving an increased matching clearance will cause the clutch 26 to produce abnormal noise when starting and running, so as to achieve reliable, stable and effective operation of the precision clutch of the high-speed hot die forging press and the automatic line when the temperature rise is large.

[0036] The phenolic laminated cloth ring guide rail 11 is arranged on the circumferential side wall of the clutch piston 7. It is easy to disassemble and assemble, and the phenolic laminated cloth ring guide rail 11 slides with the clutch piston 7 to maximize the low friction coefficient, good heat resistance, and impact resistance and noise reduction characteristics of the phenolic laminated cloth ring guide rail 11.

[0037] The clutch piston 7 has a mounting groove 14 on its circumferential side wall, and a plurality of phenolic laminated cloth ring guide rails 11 are arranged at intervals along the circumferential direction on the mounting groove 14. The phenolic laminated cloth ring guide rails 11 are fastened to the clutch piston 7 by screws and pins A (usually slotted cylindrical head screws).

[0038] The pressure plate body 601 and the raised guide plate 602 are integrally formed, which has the advantages of high processing accuracy and high structural strength.

[0039] Self-lubricating guide plates 13 are respectively provided on both side walls of the raised guide plate 602, and the self-lubricating guide plates 13 are fastened to the raised guide plate 602 by screws B15 (usually slotted cylindrical head screws). Directly installing the self-lubricating guide plate 13 on the raised guide plate 602 is easy to assemble and disassemble, and fully utilizes the low friction coefficient of the self-lubricating guide plate 13.

[0040] A high-speed hot die forging press clutch precision guidance process method includes the clutch precision guidance device as described above. Under the dual constraints of temperature rise, thermal expansion and abnormal noise, the main guide clearance matching condition between the clutch piston cover 8 and the clutch piston 7 is: (ΦA-Φa) / Φa=0.00045~0.00055; the auxiliary guide clearance matching condition between the clutch spring pin 10 and the clutch pressure plate hole 9 is: (ΦG-Φg) / ΦB=0.00075~0.00085, wherein ΦA represents the inner hole diameter of the clutch piston cover and the clutch piston; Φa represents the outer circle diameter formed by the clutch piston and the phenolic laminated cloth ring guide rail; ΦG represents the clutch pressure plate hole diameter; Φg represents the clutch spring pin diameter; ΦB represents the center line diameter of the clutch pressure plate hole. Only under the premise of adopting the innovative technical solution of the clutch precision guidance device mentioned above in this application can a more reasonable clearance fit be designed. The clearance fit design of this application and the clutch precision guidance device cooperate with each other to truly realize the reliable, stable and effective operation of the precision clutch of the high-speed hot die forging press and its automatic line under the condition of large temperature rise.

[0041] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0042] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A high-speed hot die forging press clutch precision guidance device, comprising a clutch arranged on a transmission shaft, wherein the clutch comprises a flywheel, a flywheel friction disc, a friction block, a clutch friction disc, a clutch pressure plate, a clutch piston, and a clutch piston cover; characterized in that: The clutch pressure plate is provided with a plurality of clutch pressure plate holes evenly spaced in the circumferential direction, the clutch piston cover is symmetrically provided with a plurality of clutch spring pins, the clutch pressure plate is sleeved on the clutch spring pins through the clutch pressure plate holes; a phenolic laminated cloth ring guide is provided between the clutch piston and the clutch piston cover in the radial circumferential direction, the clutch piston slides relative to the clutch piston cover through the phenolic laminated cloth ring guide; the clutch pressure plate comprises a pressure plate body, a plurality of raised guide plates are symmetrically spaced in the circumferential direction on the pressure plate body, a flywheel guide groove is provided on the corresponding flywheel, self-lubricating guide plates are provided between the two sides of the raised guide plates and the flywheel guide grooves, the clutch pressure plate slides relative to the flywheel guide grooves through the self-lubricating guide plates.

2. The high-speed hot die forging press clutch precision guidance device according to claim 1, characterized in that: The phenolic laminated cloth ring guide rails are evenly spaced and arranged on the circumferential side wall of the clutch piston.

3. The high-speed hot die forging press clutch precision guidance device according to claim 1 or 2, characterized in that: A mounting groove is provided on the circumferential side wall of the clutch piston, and a plurality of phenolic laminated cloth ring guide rails are provided on the mounting groove at intervals along the circumferential direction. The phenolic laminated cloth ring guide rails are fastened to the clutch piston by screws and pins A.

4. The high-speed hot die forging press clutch precision guidance device according to claim 3, characterized in that: The pressure plate body and the raised guide plate are integrally formed.

5. The high-speed hot die forging press clutch precision guidance device according to claim 4, characterized in that: Self-lubricating guide plates are respectively provided on the two side walls of the raised guide plate, and the self-lubricating guide plates are fastened to the raised guide plate by screws B.

6. A high-speed hot die forging press clutch precision guidance process method, comprising a clutch precision guidance device as claimed in any one of claims 1 to 5, under the dual factors of ensuring temperature rise, thermal expansion and abnormal noise; The main guide clearance matching conditions between the clutch piston cover and the clutch piston are: (ΦA-Φa) / Φa=0.00045~0.00055; The auxiliary guide clearance matching conditions between the clutch spring pin and the clutch pressure plate hole are: (ΦG-Φg) / ΦB=0.00075~0.00085; in, ΦA represents the inner diameter of the clutch piston cover and the clutch piston; Φa represents the outer diameter formed by the clutch piston and the phenolic laminated cloth ring guide; ΦG represents the clutch pressure plate hole diameter; Φg represents the clutch spring pin diameter; ΦB represents the centerline diameter of the clutch pressure plate hole.

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