Upward pressing type integral frame forging hydraulic press

Abstract

The invention discloses an upper pressing type integral frame forging hydraulic press which comprises an integral cast steel type rack, a split type X-shaped guide movable cross beam, a guide rail type movable workbench and a high-pressure servo proportional hydraulic control system. Wherein the integral cast steel type rack is formed by integrally casting an upper cross beam, a rectangular section upright post and a lower cross beam, so that the rigidity and the impact resistance are obviously improved; the split type movable cross beam reduces the mass of a moving part through modular connection of a guide sleeve and a middle cross beam, cooperative control of a fast forging proportional valve and an energy accumulator is combined, fast reversing of a main cylinder and a return cylinder is achieved, and the forging frequency reaches 125 times per minute; the guide rail type workbench adopts a wear-resisting guide plate and a key groove to fix a guide rail, so that the station switching precision is ensured. The device has the characteristics of high-precision forging, high-frequency operation and convenience in maintenance, and is suitable for high-efficiency forging production in the fields of aviation, automobiles and the like.

Description

Technical Field

[0001] The invention relates to the technical field of forging hydraulic equipment, in particular to an upward pressure type integral frame forging hydraulic press. Background Art

[0002] Forging hydraulic press, also known as free forging hydraulic press, is used to complete the free forging process. Under the pressure of the hydraulic press, the upper anvil, lower anvil or other forging tools are used to make the blank plastically deformed to obtain the forging material or forging with the required shape, size and internal quality. Forging hydraulic presses are divided into pull-down type and press-up type according to the transmission form.

[0003] The pull-down structure is the main structural form of the early fast forging press. Its characteristic is that the main working part is located underground. At present, the vast majority of double-column pull-down press structures have a fixed beam installed on the foundation, the cylinder body of the main cylinder is fixed on the foundation beam, the main cylinder plunger is connected to the lower end of the frame, the cylinder bodies of the two return cylinders are symmetrically installed on the fixed beam, and the piston rod of the return cylinder is connected to the lower end of the frame. The hydraulic system is fed with oil from the main cylinder, the main cylinder plunger extends, and the frame is pulled downward. The frame drives the upper anvil at the upper end to move downward and oppose the lower anvil to complete the forging of the billet. The main cylinder is drained, and the return cylinder oil piston rod drives the frame to complete the rising action. However, the frame of the double-column pull-down press as its moving part causes the moving part to have a large mass, large inertia, and difficult reversing of the hydraulic press. In addition, the depth of the press foundation of this structural form is relatively deep, and the main working parts are located underground, which causes great inconvenience to the maintenance and repair of the oil cylinder in the later stage.

[0004] The main working part of the press with an upper pressure structure is located above the ground. Since the main working part of the press with this structure is located above the ground, the center of gravity of the press is high, the anti-eccentric load capacity is limited, and the height requirement of the workshop building is high. In addition, the return cylinder of the double-column upper pressure structure is mostly designed between the movable beam and the lower crossbeam. Although this structure is easy to maintain, it occupies the lower part of the press structure and production space.

[0005] Therefore, there is an urgent need for an upper pressure forging press with compact structure, high rigidity and efficient hydraulic control. Summary of the invention

[0006] The purpose of the present invention is to provide an upper pressure integral frame forging hydraulic press, which solves the problems of loose structure, difficult maintenance and low forging frequency in the prior art through an integral cast steel frame, a split X-shaped guide movable crossbeam and an optimized hydraulic system.

[0007] To achieve the above object, the present invention provides the following technical solutions: An up-pressing integral frame forging hydraulic press, comprising an integral cast steel frame, a main cylinder, a return cylinder and a hydraulic control system. The integral cast steel frame is integrally cast by an upper crossbeam, columns and a lower crossbeam; The main cylinder, its cylinder body is fixed to the lower surface of the upper crossbeam by a flange, and the plunger of the main cylinder is hinged to the upper end of the split X-shaped guiding movable crossbeam through a ball seat; The return cylinder, its cylinder body bottom end is hinged to the counterbore of the upper crossbeam through a ball seat, and the piston rod of the return cylinder is hinged to the lower end of the split X-shaped guiding movable crossbeam through a small ball support and a small ball seat; The split X-shaped guiding movable crossbeam includes a middle crossbeam, guide sleeves and tie rods. The guide sleeves are connected to the middle crossbeam through T-shaped tie rods and tension nuts to form a split guiding structure; A rail-type movable workbench is arranged on the upper surface of the lower crossbeam. The rail-type movable workbench includes a tabletop, rails and an oil cylinder. The tabletop is slidably connected to the rails through guide plates and is driven to reciprocate by the oil cylinder; The hydraulic control system includes a main pump device, a quick forging proportional valve, an accumulator station and a filling valve, and is used to control the coordinated actions of the main cylinder and the return cylinder to achieve high-pressure forging and rapid return.

[0008] Preferably, the cross-section of the columns of the integral cast steel frame is rectangular, and the joints of the upper crossbeam, columns and lower crossbeam are transitioned through rounded corners.

[0009] Preferably, a guiding device is arranged between the guide sleeves and the middle crossbeam of the split X-shaped guiding movable crossbeam. The guiding device is fixedly connected to the guide sleeves through grooves and studs, and the guide sleeves and the guiding device are axially positioned through tie rods.

[0010] Preferably, the bottom end of the cylinder body of the return cylinder is hinged to the counterbore of the upper crossbeam through a ball seat and a ball support, and the end face of the piston rod is fixedly connected to the middle crossbeam through a locking nut, a small ball support and a small ball seat.

[0011] Preferably, the hydraulic control system further includes a circulating pump group, a high-precision filter, a heater and a plate heat exchanger, which are used for continuous cooling and filtering of hydraulic oil.

[0012] Preferably, the rails of the rail-type movable workbench are connected to the foundation embedment through a keyway structure, and a wear-resistant coating is provided on the contact surface between the tabletop and the guide plates.

[0013] The working process of the present invention is as follows: The pressurizing process of the up-pressing integral frame forging press: The main pump device adjusts the output pressure through the pump head valve group. The hydraulic oil enters the main cylinder. Under the action of the pressure in the main cylinder, the X-shaped guiding movable crossbeam moves vertically downward along the integral cast steel frame. Driven by the movable crossbeam, the flat anvil completes the forging of the workpiece. During the forging process, based on the frame of the integral cast steel structure, the forging press as a whole has good rigidity and stability. In addition, the movable crossbeam of the X-shaped guiding structure is a split structure, mainly composed of parts such as the middle crossbeam, guide sleeve, tie rod, and tension nut. The guide sleeve and the middle crossbeam are connected and positioned through the tie rod and the tension nut. Compared with the traditional combined movable beam, the split X-shaped guiding movable crossbeam designed in the present invention has a more compact structure, greatly reduces the weight of the movable part of the press, can effectively improve the forging frequency and production efficiency. In addition, the split X-shaped guiding movable crossbeam can disassemble the tie rod to complete the maintenance of the guiding device in the X-shaped guiding movable crossbeam without disassembling other components, providing convenience for the later maintenance of the equipment.

[0014] The unloading and return stroke process of the up-pressing integral frame forging press: When the up-pressing integral frame forging press is in the unloading and return stroke, the hydraulic oil will enter the return cylinders on both sides of the press. The return cylinders are piston cylinders, located inside the press frame. The bottom end of the return cylinder block is hung upside down on both sides of the main cylinder of the press based on the ball seat and the ball support. The main function of the ball hinge at the bottom end of the cylinder block and the ball seat is to avoid the mutual force between the cylinder block and the piston rod when the return cylinder block swings. In addition, a pair of ball supports and small ball seats at the front end of the piston rod drive the middle crossbeam through the piston rod to realize the return stroke action of the press. The small ball supports and small ball seats at the front end of the piston rod are to avoid the mutual force between the piston rod and the oil cylinder caused by the swing of the middle crossbeam, resulting in oil leakage of the oil cylinder.

[0015] The process of moving the forging flat anvil based on the guide rail type movable workbench of the up-pressing integral press: The guide rail type movable workbench is mainly composed of parts such as the tabletop, guide rails, and oil cylinders. The oil cylinder is fixedly connected between the support and the foundation embedment. The oil cylinder of the workbench is a piston cylinder. The piston rod of the oil cylinder drives the tabletop, and the tabletop reciprocates along the two guide rails. The lower anvil of the forging flat anvil is located on the tabletop of the workbench, and the flat anvil and the tabletop are connected through a fixed pin. When the tabletop reciprocates, it drives the lower anvil of the forging flat anvil to reciprocate, realizing the movement of the lower anvil.

[0016] The hydraulic control principle of the up-pressing integral frame press: The hydraulic oil in the main oil tank is circulated, filtered, and cooled through the circulating pump group, high-precision filter, and plate heat exchanger to continuously keep the system hydraulic oil clean and work at the most suitable temperature. When the temperature sensor detects that the oil temperature is lower than the set value during the initial startup of the system, the heater will be started to raise the oil temperature to ensure the normal operation of the system.

[0017] The starting auxiliary pump device adjusts the pressure of the auxiliary system through the auxiliary pump head valve and performs the switching of loading and unloading. When the auxiliary action module needs to act, the auxiliary system switch valve opens to supply oil. The auxiliary pump device supplies pressure oil to the accumulator station, and the accumulator station also serves as an auxiliary power source to supply pressure oil to the return cylinder.

[0018] When the up-pressing integral frame press needs to perform the lifting (return) action, the quick forging return connection valve opens, and pressure oil enters the two side return cylinders. At the same time, the quick forging proportional valve is set to open through the electric control system with a function curve. The oil in the main cylinder is quickly unloaded to the overhead oil tank with the minimum impact. When the liquid level is higher than the drain port, the drain valve opens to return the excess oil to the main oil tank.

[0019] When the new press needs to perform the quick descent action, the drain valve of the return cylinder opens, and the oil passes through the quick descent valve of the return cylinder for linear adjustment to control the descent speed of the press. During the quick descent of the press, there will be negative pressure in the main cylinder. At this time, the filling valve quickly opens to quickly supply oil to the main cylinder through the overhead oil tank to prevent vacuum, and at the same time, the oil replenishing valve opens to supply oil to the main cylinder through the auxiliary pump device.

[0020] The main pump device adjusts the output pressure through the pump head valve group and performs the switching of loading and unloading. When the new press starts the forging and pressurizing action, the pump head valve group switches to the loading state to supply high-pressure and large-flow hydraulic oil to the main cylinder to make the main cylinder perform the descending forging action. At this time, the quick forging proportional valve is completely closed, the filling valve is completely closed, the quick forging return connection valve is completely closed, the drain valve of the return cylinder is completely closed, the auxiliary pump head valve cuts off the connection between the accumulator station and the auxiliary pump device, the auxiliary pump device is in the unloading state, and the oil in the return cylinder returns to the accumulator station through the one-way valve. When the pressure of the accumulator station is higher than the set pressure of the safety valve, the oil will be discharged back to the main oil tank through the safety valve.

[0021] In this way, by coordinating the three actions of return, quick descent, and pressurization, the continuous forging of the new press can be achieved through the program control of the electric control system. If rapid precision finishing forging is to be achieved, only by setting the program to reduce the return height can high-frequency and high-precision forging be achieved through the two actions of return and pressurization. Under the parameters of a reduction amount of 3 mm and a return height of 20 mm, the quick forging frequency can reach 125 times / min.

[0022] Corresponding high-precision and high-sensitivity sensors are set for the oil temperature, pressure, and liquid level of the whole system and are all displayed in the operation room, and automatic control, monitoring, and alarm are carried out on them. Vibration damping regulators are installed at each valve to absorb hydraulic shock, and it is easy to replace seals and perform maintenance. A dirt collecting oil tank and a sewage pump are provided beside the unit to centrally treat the contaminated hydraulic oil generated during the production process to ensure a clean production environment.

[0023] The beneficial effects of the present invention are: (1) The present invention adopts an integral cast steel frame, which is integrally cast by an upper crossbeam, columns and a lower crossbeam. The rectangular cross-section columns and the rounded corner transition design greatly enhance the impact resistance of the frame, reduce the forging deformation amount, ensure the dimensional accuracy and internal tissue uniformity of the forgings, and reduce the subsequent machining allowance.

[0024] (2) In the present invention, the split X-shaped guiding movable crossbeam reduces the inertia of the moving parts through lightweight design and modular connection of the guide sleeve and the middle crossbeam. Combined with the coordinated control of the quick forging proportional valve and the accumulator station, rapid commutation of the main cylinder and the return cylinder is achieved. Under the conditions of a reduction amount of 3 mm and a return height of 20 mm, the forging frequency can reach 125 times per minute, and the efficiency is increased by more than 30%.

[0025] (3) The split movable crossbeam of the present invention realizes the quick overhaul and replacement of the guiding device through the detachable design of the tie rod; the spherical hinge structure (small ball support, small ball seat) of the return cylinder effectively absorbs the eccentric load torque and reduces the wear of the seals; the rail-type movable workbench adopts wear-resistant coating guide plates and keyway-fixed rails, reduces the maintenance frequency, extends the service life, and at the same time ensures the accuracy and efficiency of the station switching. Description of the Drawings

[0026] Figure 1 is the overall structure schematic diagram of the present invention; Figure 2 is the structure schematic diagram of the integral cast steel frame; Figure 3 is the structure schematic diagram of the split X-shaped guiding movable crossbeam; Figure 4 is the structure schematic diagram of the return cylinder; Figure 5 is the structure schematic diagram of the main cylinder; Figure 6 is the structure schematic diagram of the middle crossbeam; Figure 7 is the structure schematic diagram of the guide sleeve; Figure 8 is the structure schematic diagram of the rail-type movable workbench; Figure 9 is the structure schematic diagram of the rail and the guide plate; Figure 10 is the structure schematic diagram of the tabletop; Figure 11 is the structure schematic diagram of the hydraulic control system; In the figure: 1. Main cylinder, 101. Cylinder block, 102. Ball seat, 2. Return cylinder, 201. Ball support, 202. Ball seat, 203. Small ball support, 204. Small ball seat, 205. Locking nut, 3. Split X-shaped guiding movable crossbeam, 301. Middle crossbeam, 302. Guide sleeve, 303. Guiding device, 304. Pull rod, 305. Tension nut, 4. Flat anvil, 5. Integral cast steel type frame, 501. Upper crossbeam, 502. Column, 503. Lower crossbeam, 6. Guide rail type movable workbench, 601. Oil cylinder, 602. Table top, 603. Guide plate, 604. Guide rail, 7. Hydraulic control system, 701. Circulation pump group, 702. High-precision filter, 703. Heater, 704. Plate heat exchanger, 705. Auxiliary pump device, 706. Main pump device, 707. Pump head valve group, 708. Liquid level controller, 709. Accumulator station, 710. Safety valve, 711. Quick forging return connection valve, 712. Check valve, 713. Return cylinder drain valve, 714. Return cylinder quick descent valve, 715. Auxiliary system switch valve, 716. Auxiliary pump head valve, 717. System oil replenishing valve, 718. Return cylinder, 719. Main cylinder, 720. Quick forging proportional valve, 721. Fill valve, 722. Overhead oil tank, 723. Drain valve. Detailed implementation mode

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] As Figures 1-11A kind of up-pressing integral frame forging hydraulic press shown in the figure includes an integral cast steel frame 5, a main cylinder 1, a return cylinder 2 and a hydraulic control system 6. The integral cast steel frame 5 is integrally cast by an upper crossbeam 501, columns 502 and a lower crossbeam 503. The main cylinder 1, its cylinder body 101 is fixed to the lower surface of the upper crossbeam 501 through a flange, and the plunger of the main cylinder 1 is hinged to the upper end of the split X-shaped guiding movable crossbeam 3 through a ball seat 102. The return cylinder 2, the bottom end of its cylinder body is hinged to the counterbore of the upper crossbeam 501 through a ball seat 204, and the piston rod of the return cylinder 2 is hinged to the lower end of the split X-shaped guiding movable crossbeam 3 through a small ball support 203 and a small ball seat 204. The split X-shaped guiding movable crossbeam 3 includes a middle crossbeam 301, a guide sleeve 302 and a pull rod 304. The guide sleeve 302 is connected to the middle crossbeam 301 through a T-shaped pull rod 304 and a tension nut 305 to form a split guiding structure. A rail-type movable workbench 6 is arranged on the upper surface of the lower crossbeam 503. The rail-type movable workbench 6 includes a tabletop 602, rails 604 and an oil cylinder 601. The tabletop 602 is slidably connected to the rails 604 through a guide plate 603 and is driven to reciprocate by the oil cylinder 601. The rails 604 of the rail-type movable workbench 6 are connected to the foundation embedment through a keyway structure, and a wear-resistant coating is provided on the contact surface between the tabletop 602 and the guide plate 603. The hydraulic control system 7 includes a main pump device 706, a quick forging proportional valve 720, an accumulator station 709 and a filling valve 721, which is used to control the coordinated action of the main cylinder 1 and the return cylinder 2 to realize high-pressure forging and quick return. The hydraulic control system 7 also includes a circulating pump group 701, a high-precision filter 702, a heater 703 and a plate heat exchanger 704, which are used for continuous cooling and filtering of the hydraulic oil.

[0029] The cross-section of the column 502 of the integral cast steel frame 5 is rectangular, and the connection parts of the upper crossbeam 501, the column 502 and the lower crossbeam 503 are transitioned by fillets.

[0030] A guiding device 303 is arranged between the guide sleeve 302 and the middle crossbeam 301 of the split X-shaped guiding movable crossbeam 3. The guiding device 303 is fixedly connected to the guide sleeve 302 through a groove and a stud, and the guide sleeve 302 and the guiding device 303 are axially positioned through the pull rod 304.

[0031] The bottom end of the cylinder body of the return cylinder 2 is hinged to the counterbore of the upper crossbeam 501 through a ball seat 202 and a ball support 201, and the end face of the piston rod is fixedly connected to the middle crossbeam through a locking nut 205, a small ball support 203 and a small ball seat 204.

[0032] The working process of the present invention is as follows: The pressurizing process of the up-pressing integral frame forging press: The main pump device adjusts the output pressure through the pump head valve group. The hydraulic oil enters the main cylinder 1. Under the action of the main cylinder pressure, the X-shaped guiding movable crossbeam 3 moves vertically downward along the integral cast steel frame 5. The flat anvil 4 is driven by the movable crossbeam 3 to complete the forging of the workpiece. During the forging process, based on the integral cast steel structure of the frame 5, the forging press as a whole has good rigidity and stability. In addition, the movable crossbeam 3 with an X-shaped guiding structure is a split structure, mainly composed of parts such as the middle crossbeam 301, guide sleeve 302, tie rod 304, and tension nut 305. The guide sleeve 302 and the middle crossbeam 301 are connected and positioned through the tie rod 304 and the tension nut 305. Compared with the traditional combined movable beam, the split X-shaped guiding movable crossbeam 3 designed in the present invention has a more compact structure, greatly reduces the weight of the movable part of the press, can effectively improve the forging frequency and production efficiency. In addition, the split X-shaped guiding movable crossbeam 3 can disassemble the tie rod 304 to complete the maintenance of the guiding device 303 in the X-shaped guiding movable crossbeam 3 without disassembling other components, providing convenience for the later maintenance of the equipment.

[0033] The unloading and return stroke process of the up-pressing integral frame forging press: When the up-pressing integral frame forging press is in the unloading and return stroke, the hydraulic oil will enter the return cylinders 2 on both sides of the press. The return cylinders are piston cylinders and are located inside the press frame. The bottom end of the return cylinder body is hung upside down on both sides of the main cylinder of the press based on the ball seat 202 and the ball support 201. The main function of the ball support 201 and the ball seat 202 at the bottom end of the cylinder body is to avoid the mutual force between the cylinder body and the piston rod when the return cylinder body swings. In addition, a pair of small ball supports 203 and small ball seats 204 at the front end of the piston rod drive the middle crossbeam through the piston rod to realize the return stroke action of the press. The small ball supports 203 and small ball seats 204 at the front end of the piston rod are to avoid the mutual force between the piston rod and the oil cylinder caused by the swing of the middle crossbeam, resulting in oil leakage of the oil cylinder.

[0034] The process of the up-pressing integral press moving the forging flat anvil based on the rail-type moving workbench: The rail-type moving workbench 6 is mainly composed of parts such as the tabletop 602, rails 604, and oil cylinder 601. The oil cylinder 601 is fixedly connected between the support and the foundation embedment. The oil cylinder of the workbench is a piston cylinder. The piston rod of the oil cylinder drives the tabletop 602, and the tabletop 602 reciprocates along the two rails 604. The lower anvil of the forging flat anvil 4 is located on the tabletop of the workbench, and the flat anvil and the tabletop are connected by a fixed pin. When the tabletop reciprocates, it drives the lower anvil of the forging flat anvil to reciprocate, realizing the movement of the lower anvil.

[0035] The hydraulic control principle of the up-pressing integral frame press: The hydraulic oil in the main oil tank is circulated, filtered, and cooled through the circulation pump group 701, high-precision filter 702, and plate heat exchanger 704 to continuously keep the system oil clean and work at the most suitable temperature. When the temperature sensor detects that the oil temperature is lower than the set value during the initial startup of the system, the heater 703 will be started to raise the oil temperature to ensure the normal operation of the system.

[0036] Start the auxiliary pump device 705 to adjust the auxiliary system pressure through the auxiliary pump head valve 716 and perform the switching of loading and unloading. If the auxiliary action module needs to act, the auxiliary system switch valve 715 will open to supply oil. The auxiliary pump device 705 will replenish pressure oil to the accumulator station 709, and the accumulator station will also serve as an auxiliary power source to provide pressure oil for the return cylinder 718.

[0037] When the up-pressing integral frame press needs to lift (return) action, the quick forging return connection valve 711 opens, and the pressure oil from the accumulator station 709 will enter the two side return cylinders 718. At the same time, the quick forging proportional valve 720 is set to open through the electric control system with a function curve. The oil in the main cylinder 719 will be quickly unloaded to the overhead oil tank 722 with the minimum impact. If the liquid level is higher than the drain port, the drain valve 723 will open to return the excess oil to the main oil tank.

[0038] When the new press needs to perform a quick descent action, the return cylinder drain valve 713 opens, and the oil is linearly regulated through the return cylinder quick descent valve 714 to control the descent speed of the press. During the quick descent of the press, there will be negative pressure in the main cylinder 719. At this time, the filling valve 721 will quickly open to quickly replenish oil to the main cylinder 719 through the overhead oil tank 722 to prevent vacuum. At the same time, the oil replenishing valve 717 opens to replenish oil to the main cylinder through the auxiliary pump device 705.

[0039] The main pump device 706 adjusts the output pressure through the pump head valve group 707 and performs the switching of loading and unloading. When the new press starts the forging and pressurizing action, the pump head valve group 707 switches to the loading state to provide high-pressure and large-flow hydraulic oil for the main cylinder to make the main cylinder perform the descending forging action. At this time, the quick forging proportional valve 720 is completely closed, the filling valve 721 is completely closed, the quick forging return connection valve 711 is completely closed, the return cylinder drain valve 713 is completely closed, the auxiliary pump head valve 716 cuts off the connection between the accumulator station 709 and the auxiliary pump device 705, the auxiliary pump device 705 is in the unloading state, and the oil in the return cylinder returns to the accumulator station 709 through the one-way valve 712. When the pressure of the accumulator station is higher than the set pressure of the safety valve 710, the oil will be discharged back to the main oil tank through the safety valve 710.

[0040] In this way, by coordinating the three actions of return stroke, rapid descent, and pressurization, continuous forging of the new press can be achieved through the program control of the electric control system. To achieve rapid precision finishing forging, only by setting the program to reduce the return stroke height, high-frequency and high-precision forging can be achieved through the two actions of return stroke and pressurization. Under the parameters of a reduction amount of 3 mm and a return stroke height of 20 mm, the rapid forging frequency can reach 125 times / min.

[0041] High-precision and highly sensitive sensors are set for the oil temperature, pressure, and liquid level of the entire system, and they are all displayed in the operation room, and automated control, monitoring, and alarm are carried out on them. Vibration damping regulators are installed at each valve to absorb hydraulic shocks and are easy to replace seals and repair. A dirt accumulation oil tank and a sewage pump are provided beside the unit to centrally treat the contaminated hydraulic oil generated during the production process to ensure a clean production environment.

[0042] The above are only the preferred examples of the present invention. It should be noted that for those of ordinary skill in the art, under the technical inspiration provided by the present invention, as common general knowledge in the art, other equivalent variations and improvements can also be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic press forging machine with an integral frame, characterized in that: It comprises an integral cast steel frame (5), a main oil cylinder (1), a return cylinder (2) and a hydraulic control system (6); the integral cast steel frame (5) is integrally cast by an upper crossbeam (501), a column (502) and a lower crossbeam (503); The main oil cylinder (1) has a cylinder body (101) fixed to the lower surface of the upper crossbeam (501) via a flange, and the plunger of the main oil cylinder (1) is hinged to the upper end of the split X-shaped guide movable crossbeam (3) via a ball seat (102); The bottom end of the cylinder body of the return cylinder (2) is hinged to the countersunk hole of the upper crossbeam (501) through a ball seat (204), and the piston rod of the return cylinder (2) is hinged to the lower end of the split X-shaped guide movable crossbeam (3) through a small ball support (203) and a small ball seat (204); The split X-shaped guide movable crossbeam (3) comprises a middle crossbeam (301), a guide sleeve (302) and a pull rod (304); the guide sleeve (302) is connected to the middle crossbeam (301) via a T-shaped pull rod (304) and a tension nut (305) to form a split guide structure; A guide rail type movable workbench (6) is provided on the upper surface of the lower cross beam (503), the guide rail type movable workbench (6) comprising a table top (602), a guide rail (604) and an oil cylinder (601), the table top (602) being slidably connected to the guide rail (604) via a guide plate (603) and being driven to reciprocate by the oil cylinder (601); The hydraulic control system (7) comprises a main pump device (706), a fast forging proportional valve (720), an accumulator station (709) and a charging valve (721), and is used to control the coordinated action of the main oil cylinder (1) and the return cylinder (2) to achieve high-pressure forging and fast return.

2. The upward pressure type integral frame forging hydraulic press according to claim 1, characterized in that: The cross section of the upright column (502) of the integral cast steel frame (5) is rectangular, and the connection between the upper crossbeam (501), the upright column (502) and the lower crossbeam (503) is transitioned through rounded corners.

3. The upward pressure type integral frame forging hydraulic press according to claim 1 or 2, characterized in that: A guide device (303) is provided between the guide sleeve (302) and the middle cross beam (301) of the split X-shaped guide movable cross beam (3); the guide device (303) is connected and fixed to the guide sleeve (302) via a groove and a stud; and the guide sleeve (302) and the guide device (303) are axially positioned via a pull rod (304).

4. The upward pressure type integral frame forging hydraulic press according to claim 3, characterized in that: The bottom end of the cylinder body of the return cylinder (2) is hinged to the countersunk hole of the upper crossbeam (501) via a ball seat (202) and a ball support (201), and the end face of the piston rod is fixedly connected to the middle crossbeam via a locking nut (205), a small ball support (203) and a small ball seat (204).

5. The upward pressure type integral frame forging hydraulic press according to claim 4, characterized in that: The hydraulic control system (7) further comprises a circulation pump group (701), a high-precision filter (702), a heater (703) and a plate heat exchanger (704), which are used for continuous cooling and filtering of hydraulic oil.

6. The upward pressure type integral frame forging hydraulic press according to claim 5, characterized in that: The guide rail (604) of the guide rail type movable workbench (6) is connected to the base embedded part via a keyway structure, and the contact surface between the table top (602) and the guide plate (603) is provided with a wear-resistant coating.

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