Symmetrical conical friction wheel return type clutch screw press

Abstract

A symmetrical conical friction wheel return stroke type clutch type screw press comprises a flywheel assembly, the flywheel assembly is installed on a sliding screw pair through a bearing, the sliding screw pair is installed on a press body, and downward striking and return stroke lifting motion are achieved through connection and disconnection of a downward clutch and a return stroke clutch; a complex return stroke hydraulic lifting system and an additional return stroke rotating motor, or an oil motor in rotary motion or a hydraulic oil cylinder in linear motion are omitted, energy and motion provided by the flywheel rotating in the single direction are fully utilized, and the motion of the flywheel rotating in the single direction is reversed through symmetrical conical friction transmission; energy and movement provided by the two pairs of large conical wheels are used for realizing reverse rotation of the screw rod to enable the sliding block to return upwards; the return stroke structure is simple, operation and control are flexible, return stroke is rapid, controllability is high, the energy utilization rate is high, cost is low, and maintenance cost is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the field of clutch type screw presses in forging equipment, and in particular relates to a symmetrical conical friction wheel return type clutch type screw press. Background Art

[0002] The clutch screw press breaks through the forward and reverse motion of the flywheel of the traditional screw press. Its flywheel rotates in a single direction and its speed is basically constant. A clutch is designed between the flywheel and the screw. Through the engagement and disengagement of the clutch, the striking energy and striking force can be flexibly and reliably controlled to achieve accurate control of the forging process. Therefore, the clutch screw press has become the first choice for medium and large-sized screw presses today.

[0003] The clutch screw press drives the flywheel to rotate in one direction through the main motor at the top, and drives the screw to rotate through the engagement of the clutch, so that the slider can move downward to achieve striking motion. When the clutch is disengaged, the flywheel stops providing energy. At present, the upward return method of the slider of the clutch screw press is mainly to lift the slider with a hydraulic cylinder or to drive the screw to reverse to make the slider return upward; however, there are the following disadvantages:

[0004] 1) There are multiple hydraulic cylinders for return linear motion symmetrically arranged on both sides of the slider. During the return process of the lifting slider, due to the asynchronous linear motion of multiple hydraulic cylinders, it is very easy to cause the slider to get stuck during the upward process, and the movement stability is poor, the cylinder seal and the slider guide surface are seriously worn, and the energy is seriously wasted.

[0005] 2) The way the slider returns under the linear drive of multiple hydraulic cylinders on both sides requires the return hydraulic cylinders to move quickly and reliably, resulting in a large installed power, high energy consumption, large floor space and high maintenance cost for the return hydraulic pump station system.

[0006] 3) During the stage when the slider moves downward to strike the workpiece and the process when the hydraulic cylinder lifts the slider upward and returns, the slider is always in single-sided contact with the screw, causing serious friction and wear of the friction pair materials of the screw and nut, and high cost of use and maintenance.

[0007] 4) The upward return stroke of the slider uses another motor or oil motor different from the main motor to drive the screw to reverse, but it is necessary to add an additional return motor or oil motor in the narrow space of the upper beam of the whole machine, which is difficult to design and has a complex structure, or a hydraulic pump station with a large footprint and high cost. Summary of the invention

[0008] In order to overcome the shortcomings of the above-mentioned technology, the purpose of the present invention is to provide a clutch-type screw press with a symmetrical conical friction wheel return type, which eliminates the complicated return hydraulic lifting system and the additional return rotating motor, or the rotary oil motor, or the linear hydraulic cylinder, and makes full use of the energy and movement provided by the unidirectional rotating flywheel. The movement of the unidirectional rotating flywheel is reversed through the symmetrical conical friction transmission, and the energy and movement provided by two pairs of large conical wheels are used to realize the screw reversal to make the slider return upward; the return structure is simple, the operation and control are flexible, the return is fast, the controllability is strong, the energy utilization rate is high, the cost is low, and the maintenance cost is greatly reduced.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A symmetrical conical friction wheel return clutch type screw press comprises a flywheel assembly, which is mounted on a sliding screw pair through a bearing, and the sliding screw pair is mounted on a machine body. Downward striking and return lifting movements are achieved through the engagement and disengagement of a downward clutch and a return clutch.

[0011] The fuselage comprises an upper crossbeam 20, a tightening bolt nut 25, a fuselage tightening bolt 26, a column 21, a workbench pad 23 and a base 24. The upper crossbeam 20 and the base 24 are connected by the column 21, and the workbench pad 23 is installed on the base 24.

[0012] The sliding spiral pair includes a screw 15, which is installed on the upper crossbeam 20 through an upper crossbeam supporting sliding bearing 13. The screw 15 is connected to a nut 17, and a middle boss of the screw is used to support a cone ring 14 to withstand the axial force exerted on the screw 15 during the striking process; the nut 17 is connected to a slider 19, and the top of the slider 19 is installed on the inner side of the upper crossbeam 20 through a slider cylindrical guide sleeve 18, and the bottom of the slider 19 is installed in a slider guide rail 22 on a column 21.

[0013] The flywheel assembly is installed on the part where the screw 15 extends out of the upper crossbeam 20, including the clutch lower active plate 9, the upper active friction plate 6, the clutch oil cylinder and its fixing plate, etc.; the clutch lower active plate 9 and the output shaft of the main motor 28 are connected to transmit power through gears, and the main motor 28 is connected to the upper crossbeam 20; the upper part of the clutch lower active plate 9 is integrated with the large gear driven by the motor, and the lower part has a conical surface for return travel, and the clutch lower active plate 9 is supported on the outer side of the hub cylindrical surface of the driven friction plate 8 through a thrust ball bearing;

[0014] The clutch comprises a control hydraulic oil rotary joint 1, the upper part of the hydraulic oil rotary joint 1 is connected to the pump station through an oil pipe, the lower part of the hydraulic oil rotary joint 1 is connected to the clutch hydraulic oil block 2, the side of the clutch hydraulic oil block 2 is connected to the clutch control cylinder 4 through a hydraulic oil pipe 3, the lower part of the clutch hydraulic oil block 2 is connected to the clutch cylinder fixed active disk 5, and the clutch control cylinder 4 is installed on the clutch cylinder fixed active disk 5; the clutch cylinder fixed active disk 5 is connected to the clutch lower active disk 9, and the inner side of the clutch cylinder fixed active disk 5 is installed on the screw 15 through a bearing; the outer side of the clutch upper active disk 6 is connected to the clutch lower active disk 9 through a spline, and the inlaid friction material 7 on the lower part of the clutch upper active disk 6, the upper part of the clutch lower active disk 9 and the inner part of the driven friction disk 8 are in contact with each other, and the inner side of the driven friction disk 8 is connected to the screw 15.

[0015] The return system of the slider includes a slider return cylinder 10, which is symmetrically arranged and fixed on the upper cross beam 20. The slider return cylinder 10 is connected to the friction cone wheel rotating sleeve 11. The conical friction surface contacts the lower conical friction surface of the clutch lower active plate 9 and the driven lower cone plate 12 at the same time only during the return stroke; the driven lower cone plate 12 is connected to the screw 15.

[0016] The slider return cylinder 10 includes a cone wheel left and right moving cylinder piston 10-2, one end of which is installed in the cone wheel control cylinder body 10-1, and the other end of the cone wheel left and right moving cylinder piston 10-2 is connected to the cone wheel fastening shaft 10-3, and the cone wheel fastening shaft 10-3 is connected to the friction cone wheel rotating sleeve 11 through the cone wheel support left bearing 10-4 and the cone wheel support right bearing 10-5.

[0017] The hydraulic oil rotary joint 1 includes an inner tube 1-4, which is installed inside the hydraulic rotary joint housing 1-1 through an upper ball bearing 1-5, a bearing sleeve 1-6 and a lower ball bearing 1-7; a buffer spring 1-3 is provided between the inner tube 1-4 and the hydraulic rotary joint housing 1-1 to press the inner tube 1-4 to ensure the sealing of the inner tube 1-4 during rotation.

[0018] The clutch control cylinder 4 includes a cylinder body 4-1, which is connected to a fixed active disc 5 of the clutch cylinder. The upper end of the piston 4-2 is installed inside the cylinder body 4-1, and the lower end is fixedly connected to the clutch upper active disc 6 through a piston rod guide sleeve 4-4. A piston return spring 4-3 is provided on the outer side of the piston 4-2, one end of which is against the upper end of the piston 4-2, and the other end is against the piston rod guide sleeve 4-4.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1) The present invention makes full use of the energy and movement provided by the single power source of the flywheel rotating in one direction, and utilizes the conical outer sleeve friction wheel supported on the piston rod by two conical rollers arranged at the radially symmetrical position of the screw to change the rotation direction of the flywheel, so as to realize the screw reversal and return the slider. The required return hydraulic pump station only needs to provide the positive pressure of the small-diameter friction cone wheel to compress the master and slave friction cone wheels, and the upward energy of the slider is completely provided by the main motor driven by the flywheel, so that the installed power of the return hydraulic pump station system is much smaller than that of the existing large-diameter hydraulic cylinder return on both sides of the slider, and it is more energy-efficient.

[0021] 2) The forward rotation of the screw drives the slider to strike the workpiece. The new principle of symmetrical conical friction wheel return is adopted. The reverse rotation of the screw drives the slider to return, which avoids the unilateral force of the screw thread, reduces the wear between the screw and the nut, increases the service life, and reduces the maintenance cost.

[0022] 3) Compared with the rotation return method using a dedicated slider return motor or oil motor, the present invention makes full use of the flywheel rotating in a single direction for return, without the need to install an additional return motor or oil motor, thus simplifying the transmission scheme and effectively reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of the entire machine according to an embodiment of the present invention.

[0024] Figure 2 It is a left view of the whole machine according to an embodiment of the present invention.

[0025] Figure 3 This is a top view of the entire machine according to an embodiment of the present invention.

[0026] Figure 4 This is a diagram of the return stroke of the slider realized by the clutch and the symmetrical conical friction wheel according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with embodiments and drawings.

[0028] Reference Figure 1 , Figure 2 , Figure 3 A symmetrical conical friction wheel return clutch type screw press comprises a flywheel assembly, which is mounted on a sliding screw pair through a bearing, and the sliding screw pair is mounted on a machine body, and the downward striking and return lifting movements are achieved through the engagement and disengagement of a downward clutch and a return clutch.

[0029] The fuselage includes an upper crossbeam 20, tightening bolts and nuts 25, fuselage tightening bolts 26, columns 21, a workbench pad 23 and a base 24; the upper crossbeam 20, the base 24 and the columns 21 are connected by the fuselage tightening bolts 26 and the tightening bolts and nuts 25, and a workbench pad 23 is installed on the base 24.

[0030] The sliding spiral pair includes a screw 15, a nut 17, a slider 19, a slider guide rail 22, a slider cylindrical guide sleeve 18 and a straight nut clamping and fixing cover 16; the screw 15 is installed in the center hole of the upper beam 20 through the upper beam supporting sliding bearing 13, the screw 15 is connected to the nut 17 through a thread, and the middle boss of the screw is used to bear the axial force exerted on the screw 15 during the striking process; the nut 17 is connected to the slider 19 and the nut clamping and fixing cover 16 through screws, the top of the slider 19 is installed on the inner side of the upper beam 20 through the slider cylindrical guide sleeve 18, and the bottom of the slider 19 is installed in the slider guide rail 22 on the column 21, and the slider cylindrical guide sleeve 18 and the slider guide rail 22 jointly ensure the stability of the axial movement of the slider 19.

[0031] The flywheel assembly is installed on the part of the screw 15 extending out of the upper crossbeam 20. The large gear installed on the clutch lower active plate 9 is meshed with the main motor upper gear 27 installed on the output shaft of the main motion motor 28, and the main motor 28 is connected to the upper crossbeam 20; the upper part of the clutch lower active plate 9 is integrated with the large gear driven by the motor, and the lower part has a conical surface for return travel. The clutch lower active plate 9 is supported on the outer side of the hub cylindrical surface of the driven friction plate 8 through a thrust ball bearing.

[0032] The clutch comprises a hydraulic oil rotary joint 1, a clutch hydraulic oil block 2, a hydraulic oil pipe 3, a clutch control cylinder 4, a clutch cylinder fixed active disk 5, a clutch upper active disk 6, an insert friction material 7 and a driven friction disk 8; the hydraulic oil rotary joint 1 is connected to a pump station at the top, the hydraulic oil rotary joint 1 is threadedly connected and sealed to the clutch hydraulic oil block 2 at the bottom, a hydraulic channel is provided inside the clutch hydraulic oil block 2, the side of the clutch hydraulic oil block 2 is connected to the clutch control cylinder 4 through a hydraulic oil pipe 3, the bottom of the clutch hydraulic oil block 2 is connected to the clutch cylinder fixed active disk 5 through a bolt, and the clutch control cylinder 4 is installed on the clutch cylinder fixed active disk 5; the clutch cylinder fixed active disk 5 is connected to the clutch lower active disk 9 through bolts, and the inner side of the clutch cylinder fixed active disk 5 is installed on the screw 15 through a bearing; the outer side of the clutch upper active disk 6 is connected to the clutch lower active disk 9 through a spline, the insert friction material 7 inlaid below the clutch upper active disk 6, above the clutch lower active disk 9 and inside the driven friction disk 8 cooperates and contacts, and the inner side of the driven friction disk 8 is connected to the screw 15 through a key.

[0033] The return system of the slider includes a slider return cylinder 10, a driven lower cone disk 12 and a friction cone wheel rotating sleeve 11; the slider return cylinder 10 is symmetrically arranged and fixed on the upper cross beam 20, the slider return cylinder 10 is connected to the friction cone wheel rotating sleeve 11, and the conical friction surface is in contact with the lower conical friction surface of the clutch lower active disk 9 and the driven lower cone disk 12 at the same time only during the return stroke; the driven lower cone disk 12 is connected to the screw 15 through a key.

[0034] Reference Figure 4 The slider return cylinder 10 is composed of a cone wheel control cylinder body 10-1, a cone wheel left and right moving cylinder piston 10-2, a cone wheel fastening shaft 10-3, a cone wheel support left bearing 10-4 and a cone wheel support right bearing 10-5. One end of the cone wheel left and right moving cylinder piston 10-2 is installed in the cone wheel control cylinder body 10-1, and the other end of the cone wheel left and right moving cylinder piston 10-2 is connected to the cone wheel fastening shaft 10-3 through a threaded connection. The cone wheel fastening shaft 10-3 is connected to the friction cone wheel rotating sleeve 11 through the cone wheel support left bearing 10-4 and the cone wheel support right bearing 10-5.

[0035] Reference Figure 4 The hydraulic oil rotary joint 1 includes a hydraulic rotary joint housing 1-1, a pressure sensor 1-2, an inner tube 1-4, a buffer spring 1-3, an upper ball bearing 1-5, a bearing sleeve 1-6 and a lower ball bearing 1-7; the inner tube 1-4 is installed inside the hydraulic rotary joint housing 1-1 through the upper ball bearing 1-5, the bearing sleeve 1-6 and the upper ball bearing 1-7; the buffer spring 1-3 provided between the inner tube 1-4 and the hydraulic rotary joint housing 1-1 presses the inner tube 1-4 to ensure the sealing of the inner tube 1-4 during rotation.

[0036] Reference Figure 4 The clutch control cylinder 4 includes a cylinder body 4-1, a piston 4-2, a piston return spring 4-3 and a piston rod guide sleeve 4-4; the cylinder body 4-1 is sealed and connected to the clutch cylinder fixed active disk 5 through the bolt holes on the flange surface, the upper end of the piston 4-2 is installed inside the cylinder body 4-1, and the lower end is fixedly connected to the clutch upper active disk 6 through the piston rod guide sleeve 4-4, and the piston return spring 4-3 provided on the outer side of the piston 4-2 has one end against the upper end of the piston 4-2 and the other end against the piston rod guide sleeve 4-4.

[0037] The clutch oil cylinder fixed active plate 5 is installed on the screw 15 through the flywheel upper supporting angular contact ball bearing 30, and the flywheel upper supporting angular contact ball bearing 30 is provided with a flywheel upper bearing clamping nut 29 for axial fixation; the driven friction plate 8 is installed on the screw 15 through a flat key 35, and the lower outer side of the driven friction plate 8 is connected to the clutch lower active plate 9 by the flywheel lower supporting angular contact ball bearing 33, and the upper part of the driven friction plate 8 is axially fixed by the screw upper locking round nut 31 and the screw lower locking round nut 32; the rotating parts connected to the screw 15 are supported on the crossbeam 20 on the fuselage through the screw upper supporting angular contact ball bearing 34.

[0038] The working principle of the present invention is:

[0039] The clutch lower active plate 9 is driven by the main motor 28, and the large gear on the clutch lower active plate 9 is driven to rotate through the small gear 27, and the clutch cylinder fixes the active plate 5 and the clutch upper active plate 6 to rotate continuously in one direction; when the slider 19 needs to move downward to hit the workpiece, the hydraulic oil is introduced into the piston chamber in the cylinder body 4-1 of the clutch cylinder through the hydraulic oil rotary joint 1, and the piston 4-2 is pushed downward to overcome the pressure of the piston return spring 4-3, and the clutch upper active plate 6 connected thereto is driven to engage with the inlaid friction material 7 on the driven friction plate 8 and press on the clutch lower active plate 9, and the driven friction plate 8 is driven to rotate through the friction force, and then the screw 15 is driven to rotate, and the nut 17 and the slider 19 are driven downward to hit the workpiece. After the impact is completed, the hydraulic oil is discharged from the cylinder body 4-1, and the piston 4-2 moves upward under the restoring force of the piston return spring 4-3, driving the clutch upper active plate 6 to disengage from the insert friction material 7, cutting off the power transmission of the flywheel process. At the same time, the hydraulic oil enters the oil inlet chamber of the cone wheel control cylinder body 10-1, pushing the cone wheel left and right moving cylinder piston 10-2 to move forward, pushing the friction cone wheel rotating sleeve 11 to contact the return cone friction surface on the lower side of the clutch lower active plate 9 and the cone friction surface of the driven lower cone plate 12, and driving the driven lower cone plate 12 to rotate through friction; the friction cone wheel rotating sleeve 11 plays a role similar to an idler wheel, causing the screw 15 to rotate in the opposite direction, thereby driving the nut 17 and the slider 19 to return and rise.

Claims

1. A symmetrical conical friction wheel return type clutch type screw press, characterized in that: It includes a flywheel assembly, which is mounted on a sliding screw pair through a bearing, and the sliding screw pair is mounted on a machine body, and the downward striking and return lifting movements are realized through the engagement and disengagement of a downward clutch and a return clutch; The fuselage comprises an upper crossbeam (20), the upper crossbeam (20) and a base (24) are connected via a column (21), and a workbench pad (23) is installed on the base (24); The sliding screw pair comprises a screw rod (15), the screw rod (15) is installed on the upper cross beam (20) through the upper cross beam supporting sliding bearing (13), the screw rod (15) is connected with a nut (17), and the middle boss of the screw rod is used to bear the axial force of the screw rod (15) during the striking process by using a cone ring (14) supported by the middle boss of the screw rod; the nut (17) is connected with a slider (19), the upper part of the slider (19) is installed on the inner side of the upper cross beam (20) through a slider cylindrical guide sleeve (18), and the lower part of the slider (19) is installed in a slider guide rail (22) on a column (21).

2. The clutch type screw press according to claim 1, characterized in that: The flywheel assembly is installed on the part of the screw (15) extending out of the upper crossbeam (20), and includes a clutch lower active plate (9) and a clutch; the clutch lower active plate (9) and the output shaft of the main motor (28) are connected to transmit power through gears, and the main motor (28) is connected to the upper crossbeam (20); the upper part of the clutch lower active plate (9) is integrated with the large gear driven by the motor, and the lower part has a conical surface for return travel, and the clutch lower active plate (9) is supported on the outer side of the hub cylindrical surface of the driven friction plate (8) through a thrust ball bearing; The clutch comprises a hydraulic oil rotary joint (1), wherein the upper part of the hydraulic oil rotary joint (1) is connected to a pump station, the lower part of the hydraulic oil rotary joint (1) is connected to a clutch hydraulic oil block (2), the side of the clutch hydraulic oil block (2) is connected to a clutch control cylinder (4) through a hydraulic oil pipe (3), the lower part of the clutch hydraulic oil block (2) is connected to a clutch cylinder fixed active disk (5), and the clutch control cylinder (4) is mounted on the clutch cylinder fixed active disk (5); the clutch cylinder fixed active disk (5) is connected to a clutch lower active disk (9), and the inner side of the clutch cylinder fixed active disk (5) is mounted on a screw (15) through a bearing; the outer side of the clutch upper active disk (6) is connected to the clutch lower active disk (9) through a spline, the lower part of the clutch upper active disk (6), the upper part of the clutch lower active disk (9) and the inserted friction material (7) inlaid in the inner part of the driven friction disk (8) are in contact with each other, and the inner side of the driven friction disk (8) is connected to the screw (15).

3. The clutch type screw press according to claim 2, characterized in that: The slider return system comprises a slider return oil cylinder (10), which is symmetrically arranged and fixed on an upper cross beam (20), and is connected to a friction cone wheel rotating sleeve (11). The conical friction surface contacts the lower conical friction surface of the clutch lower active plate (9) and the driven lower conical plate (12) at the same time only during the return stroke; the driven lower conical plate (12) is connected to a screw rod (15).

4. The clutch type screw press according to claim 2, characterized in that: The hydraulic oil rotary joint (1) comprises an inner tube (1-4), and the inner tube (1-4) is installed inside a hydraulic rotary joint housing (1-1) through an upper ball bearing (1-5), a bearing sleeve (1-6) and a lower ball bearing (1-7); a buffer spring (1-3) provided between the inner tube (1-4) and the hydraulic rotary joint housing (1-1) presses the inner tube (1-4) to ensure the sealing performance of the inner tube (1-4) during rotation.

5. The clutch type screw press according to claim 2, characterized in that: The clutch control cylinder (4) comprises a cylinder body (4-1), the cylinder body (4-1) is connected to a clutch cylinder fixed active disk (5), the upper end of a piston (4-2) is mounted inside the cylinder body (4-1), and the lower end is fixedly connected to a clutch upper active disk (6) via a piston rod guide sleeve (4-4), and a piston return spring (4-3) is arranged on the outer side of the piston (4-2), one end of which presses against the upper end of the piston (4-2), and the other end presses against the piston rod guide sleeve (4-4).

6. The clutch type screw press according to claim 3, characterized in that: The slider return cylinder (10) comprises a cone wheel left-right moving cylinder piston (10-2), one end of the cone wheel left-right moving cylinder piston (10-2) is installed in the cone wheel control cylinder body (10-1), the other end of the cone wheel left-right moving cylinder piston (10-2) is connected to the cone wheel fastening shaft (10-3), and the cone wheel fastening shaft (10-3) is connected to the friction cone wheel rotating sleeve (11) through the cone wheel support left bearing (10-4) and the cone wheel support right bearing (10-5).

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