Near-isothermal forging system for large disc forgings of heavy hydraulic press

Abstract

The invention discloses a heavy hydraulic machine large disc forging near-isothermal forging system, and relates to the field of hydraulic forging, the heavy hydraulic machine large disc forging near-isothermal forging system comprises a material taking and placing robot and a robot track, two sides of the robot track are provided with heating furnace groups, one end of the robot track is provided with a hydraulic machine main body, and a press lower backing plate is provided with a lower die holder and a lower die core; an upper die base and an upper die core are arranged on the press upper base plate, a die core heating mechanism is arranged between the upper die core and the lower die core, and a heat preservation mechanism is arranged on the periphery of the heating mechanism. Before a blank is placed between the upper die core and the lower die core, the upper die core and the lower die core are heated through the die core heating mechanism, the temperature of the upper / lower die core and the temperature of the blank are approximately consistent in the forging process, and therefore the forming difficulty of high-temperature alloy difficult to deform, titanium alloy and powder high-temperature alloy is greatly improved; the problems of surface cracking, large deformation dead zone, shear zone, thick cold mold structure, narrow filling property and structure control window and the like are solved.

Description

Technical Field

[0001] The present application relates to the field of hydraulic forging, and in particular to a near-isothermal forging system for large disc forgings of a heavy hydraulic press. Background Art

[0002] At present, the hot end components of aviation engines are gradually developing towards complexity, compounding, multi-in-one and no-residue trend, which puts higher requirements on the forging of aviation disc forgings. Ordinary forging technology can hardly meet the production and manufacturing of such parts. In addition, with the development of aviation deformable high-temperature alloys, forgings have gradually crossed from the scientific research and trial production stage to the small batch production and even mass production stage. The product stability requirements have been greatly improved, and the price requirements have been greatly reduced. Faced with new challenges, it is urgent to carry out research on forging cost control.

[0003] The forging refining technology of difficult-to-deform high-temperature alloys for aviation turbine disk forgings is an important solution to the above-mentioned problems. This key technology mainly starts from improving equipment capabilities and optimizing mold structures to achieve forging quality improvement and cost control.

[0004] Under the existing equipment conditions, there are still many problems in the refinement control of forgings for difficult-to-deform high-temperature alloys, mainly manifested in surface cracking, deformation dead zone, shear band, thick cold die structure, filling and narrow structure control window. Summary of the invention

[0005] The purpose of this application is to solve the problems in the refinement control of forgings of difficult-to-deform high-temperature alloys under existing equipment conditions mentioned in the above background technology, which are mainly manifested in surface cracking, deformation dead zone, shear band, thick cold die structure, filling and narrow structure control window. This application provides a near-isothermal forging system for large disc forgings of heavy hydraulic presses.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: A near-isothermal forging system for large disc forgings of a heavy hydraulic press comprises a material picking and unloading robot and a robot track, a heating furnace group, a hydraulic press body, a die base, a die core and a die core heating mechanism, heating furnace groups are arranged on both sides of the robot track, a hydraulic press body is arranged at one end of the robot track, a press lower pad is fixed on the hydraulic press body, an press upper pad is fixed at the telescopic end of the hydraulic press body, a lower die base and a lower die core are arranged on the press lower pad, an upper die base and an upper die core are arranged on the press upper pad, a hydraulic ejector rod is installed on the hydraulic press body, the hydraulic ejector rod passes through the press lower pad, the lower die base and the lower die core, a die core heating mechanism is arranged between the upper die core and the lower die core, and a heat preservation mechanism is arranged around the die core heating mechanism.

[0007] By adopting the above technical scheme, before the blank is placed between the upper die core and the lower die core, the upper die core and the lower die core are heated by the die core heating mechanism, so that the temperature of the upper die core and the lower die core is increased to 700℃-1100℃ which can meet the forging requirements, and then the blank is placed between the upper die core and the lower die core for forging, so that the temperature of the upper die core and the lower die core is close to that of the blank when forging the blank, thereby greatly improving the forming difficulties of difficult-to-deform high-temperature alloys, titanium alloys and powder high-temperature alloys, and improving the problems of surface cracking of forgings, large deformation dead zone, shear band, thick cold die structure, filling and narrow structure control window.

[0008] Furthermore, the core heating mechanism includes an upper furnace body arranged on the upper mold base, a lower furnace body is arranged on the lower mold base, heating resistor belts are fixed in the upper furnace body and the lower furnace body, a hydraulic lifting assembly is arranged between the lower furnace body and the hydraulic press body, the upper pad plate of the press and the upper mold base, the lower pad plate of the press and the lower mold core are all connected and fixed by T-bolts of sufficient strength, and the upper mold base and the upper mold core, as well as the lower mold base and the lower mold core are all fixed with bolts.

[0009] By adopting the above technical scheme, the lifting assembly is used to drive the lower furnace body to rise, so that the upper furnace body and the lower furnace body are in contact with each other, and then the heating resistor belt is operated to heat up the upper die core and the lower die core in the upper furnace body and the lower furnace body. After the temperature of the upper die core and the lower die core is raised to a suitable temperature, the robot moves the high-temperature billet between the upper die core and the lower die core, and allows the upper die core and the lower die core to forge the billet. When the upper die seat descends, the upper die seat drives the upper furnace body, allowing the upper furnace body to forge the lower furnace body, and allowing the lower furnace body to move together with the upper furnace body under the support of the lifting assembly.

[0010] Furthermore, the heating resistance belt is a high-quality Al thermal resistance wire, and a 95 porcelain corundum tube frame is arranged between the heating resistance belt and the upper furnace body and the lower furnace body. The 95 porcelain corundum tube frame is fixedly connected to the corresponding upper furnace body and the lower furnace body, and the heating resistance belt is wound on the 95 porcelain corundum tube frame.

[0011] By adopting the above technical solution, the heating resistance belt is evenly wound in the furnace of the upper furnace body and the lower furnace body using the 95 porcelain corundum tube skeleton, so that the heating resistance wire can be evenly distributed in the upper furnace body and the lower furnace body.

[0012] Furthermore, the lifting assembly includes a lifting ring fixed on one end of the lower furnace body away from the upper furnace body, lifting blocks are fixed on both sides of the lifting ring, a lifting hydraulic rod is arranged between the hydraulic press body and the lifting block, and the telescopic end of the lifting hydraulic rod is fixedly connected to the lifting block.

[0013] By adopting the above technical solution, the telescopic end of the lifting hydraulic rod is used to drive the lifting block, the lifting block drives the lifting ring, and the lifting ring drives the supporting lower furnace body when moving, so that the lower furnace body can be in contact with the upper furnace body, which is convenient for heating the upper mold core and the lower mold core, and at the same time, it is convenient to separate the lower furnace body from the upper furnace body, so as to facilitate the entry and removal of the blank.

[0014] Furthermore, a relief valve is installed in the lifting hydraulic rod.

[0015] By adopting the above technical solution, when the upper die seat drives the upper furnace body, the upper furnace body forges the lower furnace body. When the pressure of the hydraulic press body is greater than the lifting hydraulic rod, the overflow valve in the lifting hydraulic rod opens, and the lower furnace body moves downward with the upper furnace body until the forging of the billet is completed, so that the upper furnace body and the lower furnace body can maintain a state of resistance during the descending forging process.

[0016] Furthermore, the upper furnace body and the lower furnace body are 1400 mullite insulation bricks, and the upper furnace body and the lower furnace body are both provided with an outer shell, and the outer shell is a Q235 steel shell.

[0017] By adopting the above technical solution, the upper furnace body and the lower furnace body are produced using high temperature resistant materials, and at the same time, an outer shell is set on the upper furnace body and the lower furnace body, so that the upper furnace body and the lower furnace body have sufficient rigidity and thermal strength to withstand a high temperature environment of about 1200°C for a long time.

[0018] Furthermore, the insulation mechanism includes two insulation pads respectively arranged on the upper mold base and the lower mold base, and the two insulation pads are respectively located between the upper mold base and the upper mold core, and between the lower mold base and the lower mold core. The insulation pads are fixedly connected to the corresponding upper mold core and upper mold base, and lower mold core and lower mold base. A sealing ring is fixed on the upper mold base, and the sealing ring is located between the upper mold base and the upper furnace body. The sealing ring is fixedly connected to the upper furnace body, an insulation cover 1 is fixed on the upper furnace body, an insulation cover 2 is fixed on the lower furnace body, an insulation cover 3 is fixed on the insulation cover 1, and the insulation cover 3 corresponds to the lower furnace body and the insulation cover 2.

[0019] By adopting the above technical scheme, the heat transfer between the upper mold core and the lower mold core is blocked by the heat insulation pad, and the insulation sleeve 1 and the insulation sleeve 2 are used to insulate the surfaces of the upper furnace body and the lower furnace body. When the lower furnace body is in contact with the upper furnace body, the insulation sleeve 3 on the insulation sleeve 1 is arranged on the insulation sleeve 2, and the insulation sleeve 3 is used to further insulate the lower furnace body, thereby reducing the heat loss between the upper furnace body and the lower furnace body, and at the same time reducing the impact of heat transfer on normal operation.

[0020] Furthermore, the insulation sleeve three is rotatably connected to the furnace door, the insulation sleeve one, the insulation sleeve two, the insulation sleeve three and the furnace door are all ceramic fiber boards, and the insulation sleeve one, the insulation sleeve two, the insulation sleeve three and the furnace door are all fixed with an outer shell, and the outer shell is a Q235 steel plate.

[0021] By adopting the above technical solution, insulation sleeve 1, insulation sleeve 2 and insulation sleeve 3 are all made of ceramic fiberboard and Q235 steel, and the furnace door installed on insulation sleeve 3 is made of the same material, which reduces the heat loss of the upper furnace body and the lower furnace body and facilitates the feeding of the blanks.

[0022] Furthermore, a sealing barrel is arranged between one end of the lower furnace body away from the upper furnace body and the lower mold base, one end of the sealing barrel is fixedly connected to the lower furnace body, and the other end of the sealing barrel is fixedly connected to the lower mold base.

[0023] By adopting the above technical solution, the sealing barrel blocks the gap between the movable lower furnace body and the lower mold base, thereby reducing the heat outflow from the gap between the lower furnace body and the lower mold base, and further improving the uniformity of the temperature between the upper furnace body and the lower furnace body.

[0024] In summary, the present application includes at least one of the following beneficial effects: 1. In the present application, before placing the blank between the upper mold core and the lower mold core, the upper furnace body and the lower furnace body cover the upper mold core and the lower mold core, and then let the heating resistance belt work. The heating resistance belt is fixed on the inner wall of the furnace chamber with a high-quality Al resistance wire + a porcelain corundum tube skeleton. After the temperature of the upper mold core and the lower mold core rises to a suitable temperature, the lower furnace body is moved away from the upper furnace body. The robot moves the high-temperature blank between the upper mold core and the lower mold core, and then the lower furnace body is raised and abutted against the upper furnace body. Then the telescopic end on the hydraulic press body drives the upper pad of the press, and the upper pad of the press drives the upper die seat. The die base drives the upper die core to move toward the lower die core, allowing the upper die core and the lower die core to forge the blank. After the blank is forged, the upper plate of the press drives the upper die base, the upper die core and the upper furnace body to rise, and the lower furnace body continues to descend. Then the hydraulic ejector rod ejects the forging from the lower die core, and then the robot takes out the forged forging to complete the near-isothermal forging process, which greatly improves the forming difficulties of difficult-to-deform high-temperature alloys, titanium alloys and powder high-temperature alloys, and improves the problems of surface cracking of forgings, large deformation dead zone, shear band, thick cold die structure, filling and narrow structure control window.

[0025] 2. In the present application, when the upper mold core is fixed to the upper mold base by bolts, a thermal insulation pad is placed between the upper mold core and the upper mold base, and when the lower mold core is fixed to the lower mold base by bolts, a thermal insulation pad is placed between the upper mold core and the lower mold base, and the thermal insulation pad is used to block the heat transfer between the upper mold core and the lower mold core. The plate near the mold core is made of K3 material, and the plate near the mold base is made of GH4169 material. At the same time, the sealing ring seals the gap between the upper furnace body and the upper mold base, and blocks the heat generated by the upper furnace body. Then, the insulation sleeve one and the insulation sleeve two insulate the surfaces of the upper furnace body and the lower furnace body. When the lower furnace body is in contact with the upper furnace body, the insulation sleeve three on the insulation sleeve one is arranged on the insulation sleeve two, and the insulation sleeve three is used to further insulate the lower furnace body, and at the same time, the heat dissipation from the gap between the upper furnace body and the lower furnace body is reduced, thereby achieving the purpose of reducing the heat loss between the upper furnace body and the lower furnace body, and reducing the impact of heat transfer on normal operation.

[0026] 3. In the present application, the sealing barrel is made of a flexible fireproof and heat-insulating material. When the lower furnace body moves up and down, the lower furnace body drives the sealing barrel. The sealing barrel deforms with the movement of the lower furnace body. The sealing barrel seals the gap between the moving lower furnace body and the lower mold base, thereby achieving the purpose of reducing the heat outflow from the gap between the lower furnace body and the lower mold base, and further improving the uniformity of the temperature between the upper furnace body and the lower furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a system schematic diagram of a near-isothermal forging system for a large disc forging of a heavy hydraulic press in this application; Figure 2 It is a first three-dimensional structural schematic diagram of the hydraulic press body in this application; Figure 3 It is a first internal structure schematic diagram of the hydraulic press body in the present application; Figure 4 is a second internal structure schematic diagram of the hydraulic press body in the present application; Figure 5 This application Figure 4 The enlarged schematic diagram at A in the middle; Figure 6 This application Figure 4 Enlarged schematic diagram of point B in the middle.

[0028] Description of reference numerals: 1. Robot track; 2. Heating furnace group; 3. Hydraulic press body; 4. Upper mold core; 5. Lower mold core; 6. Mold core heating mechanism; 63. Upper furnace body; 64. Lower furnace body; 65. Heating resistor belt; 66. Lifting assembly; 661. Lifting ring; 662. Lifting block; 663. Lifting hydraulic rod; 7. Insulation mechanism; 71. Insulation pad; 72. Sealing ring; 73. Insulation sleeve one; 74. Insulation sleeve two; 75. Furnace door; 76. Sealing barrel; 77. Insulation sleeve three; 8. Press upper pad; 9. Press lower pad; 10. Upper mold base; 11. Lower mold base; 12. Hydraulic ejector rod. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 —6 Provide further details of this application.

[0030] The embodiment of the present application discloses a near-isothermal forging system for large disc forgings of a heavy hydraulic press.

[0031] Reference Figure 1 , Figure 2 and Figure 3 A near-isothermal forging system for large disc forgings of a heavy hydraulic press comprises a material picking and unloading robot and a robot track 1, a heating furnace group 2, a hydraulic press body 3, a die base, a die core and a die core heating mechanism 6. A heating furnace group 2 is arranged on both sides of the robot track 1, a hydraulic press body 3 is arranged at one end of the robot track 1, a press lower pad 9 is fixed on the hydraulic press body 3, a press upper pad 8 is fixed at the telescopic end of the hydraulic press body 3, a lower die base 11 and a lower die core 5 are arranged on the press lower pad 9, an upper die base 10 and an upper die core 4 are arranged on the press upper pad 8, a hydraulic ejector rod 12 is installed on the hydraulic press body 3, the hydraulic ejector rod 12 passes through the press lower pad 9, the lower die base 11 and the lower die core 5, a die core heating mechanism 6 is arranged between the upper die core 4 and the lower die core 5, and a heat preservation mechanism 7 is arranged around the die core heating mechanism 6.

[0032] Heating furnace group 3 selects 6 to 8 chamber-type electric heating furnaces. The requirements for heating furnace group 3 are as follows: Serial number Parameter requirements Chamber resistance heating furnace 1 Effective heating area size mm ～2500×2000×1000 2 Heating method Electric heating 3 Total load t 6.0～8.0 4 Common temperature range ℃ 800～1200℃ 5 Furnace temperature uniformity TUS℃ ±5℃ The pick-and-place robot fully considers the adaptability to the forging environment. It has the advantages of high precision, wide clamping range, large clamping weight, high transfer efficiency, etc. It can be operated manually, semi-automatically, and fully automatically. All controls are driven by motors and actuators. The basic requirements of the robot are as follows: Serial number Parameter requirements Parameter Value 1 Maximum load ≥800kg 2 Clamp opening ≥800mm 3 Clamping speed ≥150mm / s 4 Maximum speed in track direction 1.5m / s 5 Rotatable angle 360° 6 Supply voltage 380V(50HZ) 7 Drive mode Motor servo drive It should be noted that the farthest end of the furnace uniformity of the heating furnace and the center of the near-isothermal forging press die should be within the maximum clamping length of the robot arm.

[0033] The main body of the hydraulic press 3 is a heavy-duty die forging hydraulic press, with a designed clearance of 3.6 meters, a work surface of 3.2 meters long and 2.8 meters wide, and a pressing speed range of 0.005mm to 20mm per second. The equipment has controllable speed, pressure, and stroke, and has the characteristics of good rigidity, precise speed, and high degree of automation. Its basic parameters are as follows: Serial number project unit Specification 1 Nominal force MN 300 2 Number of master cylinders indivual 1 3 Maximum working pressure MPa 70 4 Vertical clearance distance mm 3600 5 Active crossbeam travel mm 1600 7 Workbench size mm 2800×3200 8 Column spacing mm 3400 9 Idle descent speed mm / s ～120 10 Return speed mm / s ～120 11 Position accuracy mm ±0.5 12 Leveling accuracy mm / m ±0.2 13 Working speed mm / s 0.05～20 14 Hydraulic pumps, valves - OILGEAR The upper die core 4 and the lower die core 5 are made of N3 material from Beijing Institute of Aeronautical Materials. N3 has good high temperature strength, good oxidation resistance and thermal fatigue performance, and can meet the requirements of 1100°C isothermal forging die use.

[0034] Before forging, first use the core heating mechanism 6 to heat the upper die core 4 and the lower die core 5, and at the same time, the insulation mechanism 7 insulates the upper die core 4 and the lower die core 5, so that the temperature of the upper die core 4 and the lower die core 5 is increased to meet the forging temperature and is kept warm. According to the process time plan, the blank is sent to the heating furnace group 2 on both sides of the robot track 1, and the heating furnace group 2 is used to heat multiple blanks. After the blank is heated to the forging process temperature, the robot is moved on the robot track 1 to take out the heated blank, and then the blank is sent to the upper die core 4 and the lower die core 5 of the hydraulic press body 3, and then the telescopic end on the hydraulic press body 3 drives the upper pad 8 of the press The die core 4 approaches the lower die core 5, allowing the upper die core 4 and the lower die core 5 to forge the blank, and then the blank is placed between the upper die core 4 and the lower die core 5 for forging. After forging, the upper die core 4 and the lower die core 5 are separated, and then the billet is ejected by the hydraulic ejector rod 12, and then the billet is removed by a robot. The hydraulic ejector rod 12 can withstand a high temperature environment of up to 1100°C and has a certain strength. The hydraulic ejector rod 12 is made of N3 high-temperature alloy, so that when the upper die core 4 and the lower die core 5 forge the blank, the temperature is approximately the same as the blank, thereby greatly improving the forming difficulties of difficult-to-deform high-temperature alloys, titanium alloys and powder high-temperature alloys, and improving the problems of surface cracking of forgings, large deformation dead zone, shear band, thick cold die structure, filling and narrow structure control window.

[0035] Reference Figure 2 , Figure 3 and Figure 4 The core heating mechanism 6 includes an upper furnace body 63 arranged on the upper mold base 10, and a lower furnace body 64 is arranged on the lower mold base 11. Heating resistor belts 65 are fixed in the upper furnace body 63 and the lower furnace body 64. A hydraulic lifting assembly 66 is arranged between the lower furnace body 64 and the hydraulic press body 3. The upper pad 8 of the press and the upper mold base 10, and the lower pad 9 of the press and the lower mold core 5 are connected and fixed by T-bolts with sufficient strength. The upper mold base 10 and the upper mold core 4, and the lower mold base 11 and the lower mold core 5 are fixed and connected by bolts.

[0036] Moreover, the heating resistance belt 65 is a high-quality Al thermal resistance wire, and a 95 porcelain corundum tube frame is arranged between the heating resistance belt 65 and the upper furnace body 63 and the lower furnace body 64. The 95 porcelain corundum tube frame is fixedly connected to the corresponding upper furnace body 63 and the lower furnace body 64, and the heating resistance belt 65 is wound on the 95 porcelain corundum tube frame.

[0037] The basic requirements for the upper furnace body 63 and the lower furnace body 64 are as follows: Serial number Parameter requirements Parameter Value 1 Maximum mold operating temperature 1100℃ 2 Furnace body shape <φ2800mm 3 Furnace effective heating area ~φ1600mm×1500mm 4 Number of heating zones Upper 2 zones, lower 6 zones (8 zones in total) 5 Temperature control accuracy ±0.2℃ 6 Effective area furnace temperature uniformity ±20℃ 7 Rated total power 380KW~420KW 8 power supply 380V / 50HZ three-phase The upper furnace body 63 and the lower furnace body 64 are electrically controlled and designed according to HB5425-2012. They are composed of a PID temperature control unit, a recording unit, a main circuit execution unit, a mechanical control unit and an alarm unit. The electrical system has the advantages of precise control, complete functions, strong anti-electromagnetic interference ability, stable and reliable performance, easy control and maintenance, etc.

[0038] The upper die seat 10 and the lower die seat 11 are made of 5CrNiMo steel, which has good mechanical properties and cost performance below 450°C. Before the blank is placed between the upper die core 4 and the lower die core 5, the lower furnace body 64 is driven to rise by the lifting assembly 66, so that the upper furnace body 63 and the lower furnace body 64 are in contact with each other, and the upper furnace body 63 and the lower furnace body 64 cover the upper die core 4 and the lower die core 5, and then the heating resistance belt 65 is started. The heating resistance belt 65 is fixed on the inner wall of the furnace chamber with a high-quality Al resistance wire + a porcelain corundum tube frame, so that the upper furnace body 63 and the lower furnace body 6 4 is heated. After the temperatures of the upper mold core 4 and the lower mold core 5 are raised to a suitable temperature, the lower furnace body 64 is driven by the lifting assembly 66 to move the lower furnace body 64 in a direction away from the upper furnace body 63 so that the lower furnace body 64 exposes the lower mold core 5. Then the robot moves the hot blank between the upper mold core 4 and the lower mold core 5. Then the lifting assembly 66 is used to drive the lower furnace body 64 to rise and contact the upper furnace body 63. Then the telescopic end on the hydraulic press body 3 drives the upper pad 8 of the press. The plate 8 drives the upper die seat 10, and the upper die seat 10 drives the upper die core 4 to move toward the lower die core 5, so that the upper die core 4 and the lower die core 5 forge the blank. When the upper die seat 10 descends, the upper die seat 10 drives the upper furnace body 63, so that the upper furnace body 63 forges the lower furnace body 64, and the lower furnace body 64 moves with the upper furnace body 63 under the support of the lifting assembly 66. After the blank is forged, the upper pad 8 of the press drives the upper die seat 10, the upper die core 4 and the upper furnace body 63 to rise, and the lower furnace body 64 continues to descend under the drive of the lifting assembly 66, and then the machine The forged blank is taken out, and an upper furnace body 63 and a lower furnace body 64 are mounted on the upper die core 4 and the lower die core 5, so that the heating resistor belt 65 in the upper furnace body 63 and the lower furnace body 64 heats the upper die core 4 and the lower die core 5, so that the upper die core 4 and the lower die core 5 can maintain a high temperature state when forging the blank, thereby greatly improving the forming difficulty of difficult-to-deform high-temperature alloys, titanium alloys and powder high-temperature alloys, and improving the problems of surface cracking of forgings, large deformation dead zone, shear band, thick cold die structure, filling and narrow structure control window.

[0039] Reference Figure 3 and Figure 4The lifting assembly 66 includes a lifting ring 661 fixed on the end of the lower furnace body 64 away from the upper furnace body 63, and lifting blocks 662 are fixed on both sides of the lifting ring 661. A lifting hydraulic rod 663 is arranged between the hydraulic press body 3 and the lifting block 662, and the telescopic end of the lifting hydraulic rod 663 is fixedly connected to the lifting block 662. The telescopic end of the lifting hydraulic rod 663 drives the lifting block 662, and the lifting block 662 drives the lifting ring 661. When the lifting ring 661 moves, it drives the supported lower furnace body 64, so that the lower furnace body 64 moves up and down within the range of the lower mold core 5. By using the lifting hydraulic rod 663 to drive the lower furnace body 64 to move up and down, the lower furnace body 64 can be brought into contact with the upper furnace body 63, which is convenient for heating the upper mold core 4 and the lower mold core 5, and at the same time, it is convenient for the lower furnace body 64 to be separated from the upper furnace body 63, so as to facilitate the entry and removal of the blank.

[0040] Reference Figure 3 and Figure 4 , an overflow valve is installed in the lifting hydraulic rod 663. When the telescopic end of the hydraulic press body 3 drives the upper pad 8 of the press, the upper pad 8 of the press drives the upper die seat 10, and the upper die seat 10 drives the upper furnace body 63, the upper furnace body 63 forges the lower furnace body 64, and the lower furnace body 64 forges the lifting ring 661. The lifting ring 661 forges the lifting hydraulic rod 663 by the lifting block 662. When the pressure of the hydraulic press body 3 is greater than the lifting hydraulic rod 663, the overflow valve in the lifting hydraulic rod 663 opens, and the lower furnace body 64 moves downward with the upper furnace body 63 until the forging of the billet is completed. After forging is completed, the lower furnace body 64 continues to move downward to the lowest position, and at the same time the hydraulic press body 3 drives the upper furnace body 63 to rise, and then the telescopic end of the hydraulic ejector rod 12 extends from the lower die core 4, the hydraulic ejector rod 12 ejects the forging, and then the robot takes out the forging, and when the upper furnace body 63 forges the lower furnace body 64, the lifting hydraulic rod 663 is allowed to descend with the upper furnace body 63 under the action of the overflow valve, so that the upper furnace body 63 and the lower furnace body 64 can be kept in a state of conflict during the descending forging process.

[0041] Reference Figure 2 , Figure 3 and Figure 4 The upper furnace body 63 and the lower furnace body 64 are made of 1400 mullite insulation bricks, and the upper furnace body 63 and the lower furnace body 64 are both provided with a shell, which is a Q235 steel shell. The upper furnace body 63 and the lower furnace body 64 are produced using 1400 mullite insulation bricks, ceramic fibers are added during production, and then a steel shell made of Q235 steel plate is provided on the produced upper furnace body 63 and the lower furnace body 64. By using high temperature resistant materials to produce the upper furnace body 63 and the lower furnace body 64, and providing a shell on the upper furnace body 63 and the lower furnace body 64, the upper furnace body 63 and the lower furnace body 64 can have sufficient rigidity and thermal strength, and can withstand a high temperature environment of about 1200°C for a long time.

[0042] Reference Figure 3 , Figure 4 and Figure 5 The insulation mechanism 7 includes two insulation pads 71 ​​respectively arranged on the upper mold base 10 and the lower mold base 11, and the two insulation pads 71 ​​are respectively located between the upper mold base 10 and the upper mold core 4, and between the lower mold base 11 and the lower mold core 5. The insulation pads 71 ​​and the corresponding upper mold core 4 and upper mold base 10, and the lower mold core 5 and the lower mold base 11 are fixedly connected. A sealing ring 72 is fixed on the upper mold base 10, and the sealing ring 72 is located between the upper mold base 10 and the upper furnace body 63. The sealing ring 72 is fixedly connected to the upper furnace body 63, an insulation sleeve 1 73 is fixed on the upper furnace body 63, an insulation sleeve 2 74 is fixed on the lower furnace body 64, and an insulation sleeve 3 77 is fixed on the insulation sleeve 1 73, and the insulation sleeve 3 77 corresponds to the lower furnace body 64 and the insulation sleeve 2 74.

[0043] When the upper mold core 4 is fixed to the upper mold base 10 by bolts, the heat insulation pad 71 is used to pad between the upper mold core 4 and the upper mold base 10, and when the lower mold core 5 is fixed to the lower mold base 11 by bolts, the heat insulation pad 71 is used to pad between the upper mold core 4 and the lower mold base 11, and the heat insulation pad 71 is used to block the heat transfer between the upper mold core 4 and the lower mold core 5. The plate near the mold core is made of K3 material, and the plate near the mold base is made of GH4169 material. At the same time, the sealing ring 72 seals the gap between the upper furnace body 63 and the upper mold base 10, and at the same time blocks the heat generated by the upper furnace body 63, and then the insulation sleeve 1 73 and the insulation sleeve 2 74 are used to seal the gap between the upper furnace body 63 and the upper mold base 10. The surfaces of the upper furnace body 63 and the lower furnace body 64 are insulated. When the lower furnace body 64 is in contact with the upper furnace body 63, the insulation sleeve three 77 on the insulation sleeve one 73 is mounted on the insulation sleeve two 74. The insulation sleeve three 77 is used to further insulate the lower furnace body 64, and at the same time, the heat dissipation from the gap between the upper furnace body 63 and the lower furnace body 64 is reduced. By using the insulation sleeve one 73, the insulation sleeve two 74 and the insulation sleeve three 77 to insulate the upper furnace body 63 and the lower furnace body 64, and using the insulation pad 71 to block the transfer of heat, the heat loss of the upper furnace body 63 and the lower furnace body 64 can be reduced, and the influence of heat transfer on normal operation can be reduced.

[0044] Reference Figure 3 , Figure 4 and Figure 5The insulation sleeve three 77 is rotatably connected with the furnace door 75, the insulation sleeve one 73, the insulation sleeve two 74, the insulation sleeve three 77 and the furnace door 75 are all ceramic fiber boards, and the insulation sleeve one 73, the insulation sleeve two 74, the insulation sleeve three 77 and the furnace door 75 are all fixed with an outer shell, which is a Q235 steel plate. The insulation sleeve 1 73, the insulation sleeve 2 74 and the insulation sleeve 3 77 are all made of ceramic fiberboard and Q235 steel. The furnace door 75 installed on the insulation sleeve 3 77 is made of the same material. When the upper furnace body 63 is away from the lower furnace body 64, the furnace door 75 on the insulation sleeve 3 77 is opened, and the blank is sent from the furnace door 75 to between the upper mold core 4 and the lower mold core 5. The insulation sleeve 1 73, the insulation sleeve 2 74 and the insulation sleeve 3 77 are made of enamel fiberboard and Q235 steel, and the furnace door 75 is opened on the insulation sleeve 3 77, thereby reducing the heat loss of the upper furnace body 63 and the lower furnace body 64, and facilitating the feeding of the blank.

[0045] Reference Figure 4 and Figure 6 A sealing barrel 76 is provided between one end of the lower furnace body 64 away from the upper furnace body 63 and the lower die base 11. One end of the sealing barrel 76 is fixedly connected to the lower furnace body 64, and the other end of the sealing barrel 76 is fixedly connected to the lower die base 11. The sealing barrel 76 is made of a flexible fireproof and heat-insulating material. When the lower furnace body 64 moves up and down, the lower furnace body 64 drives the sealing barrel 76. The sealing barrel 76 deforms as the lower furnace body 64 moves. The sealing barrel 76 blocks the gap between the moving lower furnace body 64 and the lower die base 11. By using the sealing barrel 76 to block the gap between the lower furnace body 64 and the lower die base 11, the heat outflow from the gap between the lower furnace body 64 and the lower die base 11 can be reduced, and the uniformity of the temperature in the upper furnace body 63 and the lower furnace body 64 can be further improved.

[0046] Working principle: During forging, the lower furnace body 64 is driven to rise by the lifting assembly 66, so that the upper furnace body 63 and the lower furnace body 64 are in contact with each other, and the upper furnace body 63 and the lower furnace body 64 cover the upper die core 4 and the lower die core 5, and then the heating resistor belt 65 is operated to heat the upper die core 4 and the lower die core 5 in the upper furnace body 63 and the lower furnace body 64. After the upper die core 4 and the lower die core 5 are heated, the blank is sent to the heating furnace group 2 on both sides of the robot track 1, and the heating furnace group 2 is used to heat multiple blanks, and the lower furnace body 64 is driven by the lifting assembly 66 to move the lower furnace body 64 away from the upper furnace body 63, so that the lower furnace body 64 exposes the lower die core 5, and then the furnace door 75 on the insulation cover 77 is opened, and then the robot takes the high-temperature blank out of the heating furnace group 2, and then moves it between the upper die core 4 and the lower die core 5, and then uses the lifting assembly 66 The lower furnace body 64 is driven to rise and contact the upper furnace body 63, and then the telescopic end on the hydraulic press body 3 drives the upper plate 8 of the press, and the upper plate 8 of the press drives the upper die seat 10, and the upper die seat 10 drives the upper die core 4 to move toward the lower die core 5, so that the upper die core 4 and the lower die core 5 forge the blank, and at the same time, the insulation sleeve 1 73, the insulation sleeve 2, and the insulation sleeve 3 77 are used to insulate the upper furnace body 63 and the lower furnace body 64, and then the insulation sleeve 1 The heat pad 71 blocks the heat of the upper die core 4 and the lower die core 5. After the forging of the billet is completed, the upper pad 8 of the press drives the upper die base 10, the upper die core 4 and the upper furnace body 63 to rise, and the lower furnace body 64 continues to descend driven by the lifting assembly 66, and then the furnace door 75 is opened, and then the telescopic end of the hydraulic ejector rod 12 rises, and the hydraulic ejector rod 12 ejects the forged forging from the lower die core 4, and then the robot takes out the forged forging.

Claims

1. A near-isothermal forging system for large disc forgings of a heavy hydraulic press, comprising a material handling robot and a robot track (1), a heating furnace group (2), a hydraulic press body (3), a die base and a die core and a die core heating mechanism (6), characterized in that: A heating furnace group (2) is arranged on both sides of the robot track (1), and a hydraulic press body (3) is arranged at one end of the robot track (1). A press lower pad (9) is fixed on the hydraulic press body (3), and a press upper pad (8) is fixed at the telescopic end of the hydraulic press body (3). A lower die seat (11) and a lower die core (5) are arranged on the press lower pad (9), and an upper die seat (10) and an upper die core (4) are arranged on the press upper pad (8). A hydraulic ejector rod (12) is installed on the hydraulic press body (3), and the hydraulic ejector rod (12) passes through the press lower pad (9), the lower die seat (11) and the lower die core (5). A die core heating mechanism (6) is arranged between the upper die core (4) and the lower die core (5), and a heat preservation mechanism (7) is arranged around the die core heating mechanism (6).

2. The near-isothermal forging system for large disc forgings of heavy hydraulic press according to claim 1 is characterized by: The mold core heating mechanism (6) comprises an upper furnace body (63) arranged on an upper mold base (10), a lower furnace body (64) arranged on the lower mold base (11), heating resistor belts (65) are fixed in the upper furnace body (63) and the lower furnace body (64), a hydraulic lifting assembly (66) is arranged between the lower furnace body (64) and the hydraulic press body (3), the upper pad (8) of the press and the upper mold base (10), and the lower pad (9) of the press and the lower mold core (5) are connected and fixed by T-bolts of sufficient strength, and the upper mold base (10) and the upper mold core (4), and the lower mold base (11) and the lower mold core (5) are fixed and connected by bolts.

3. The near-isothermal forging system for large disc forgings of heavy hydraulic press according to claim 2 is characterized by: The heating resistance belt (65) is a high-quality Al thermal resistance wire. A 95% porcelain corundum tube frame is provided between the heating resistance belt (65) and the upper furnace body (63) and the lower furnace body (64). The 95% porcelain corundum tube frame is fixedly connected to the corresponding upper furnace body (63) and the lower furnace body (64). The heating resistance belt (65) is wound around the 95% porcelain corundum tube frame.

4. The near-isothermal forging system for large disc forgings of heavy hydraulic press according to claim 2, characterized in that: The hydraulic lifting assembly (66) comprises a lifting ring (661) fixed on one end of the lower furnace body (64) away from the upper furnace body (63), lifting blocks (662) are fixed on both sides of the lifting ring (661), a lifting hydraulic rod (663) is provided between the hydraulic press body (3) and the lifting block (662), and the telescopic end of the lifting hydraulic rod (663) is fixedly connected to the lifting block (662).

5. The near-isothermal forging system for large disc forgings of heavy hydraulic press according to claim 4 is characterized by: A relief valve is installed in the lifting hydraulic rod (663).

6. The near-isothermal forging system for large disc forgings of heavy hydraulic press according to claim 2, characterized in that: The upper furnace body (63) and the lower furnace body (64) are made of 1400 mullite insulation bricks, and both the upper furnace body (63) and the lower furnace body (64) are provided with an outer shell, and the outer shell is a Q235 steel outer shell.

7. The near-isothermal forging system for large disc forgings of heavy hydraulic press according to claim 2, characterized in that: The heat-insulating mechanism (7) comprises two heat-insulating pads (71) respectively arranged on the upper mold base (10) and the lower mold base (11); the two heat-insulating pads (71) are respectively located between the upper mold base (10) and the upper mold core (4), and between the lower mold base (11) and the lower mold core (5); the heat-insulating pads (71) and the corresponding upper mold core (4) and upper mold base (10), and the lower mold core (5) and the lower mold base (11) are all fixedly connected; the upper mold base (10) is fixedly provided with a sealing member. A sealing ring (72), the sealing ring (72) being located between the upper mold base (10) and the upper furnace body (63), the sealing ring (72) being fixedly connected to the upper furnace body (63), a first insulation sleeve (73) being fixed on the upper furnace body (63), a second insulation sleeve (74) being fixed on the lower furnace body (64), a third insulation sleeve (77) being fixed on the first insulation sleeve (73), and the third insulation sleeve (77) corresponding to the lower furnace body (64) and the second insulation sleeve (74).

8. The near-isothermal forging system for large disc forgings of heavy hydraulic press according to claim 7, characterized in that: The insulation sleeve three (77) is rotatably connected to a furnace door (75); the insulation sleeve one (73), the insulation sleeve two (74), the insulation sleeve three (77) and the furnace door (75) are all made of ceramic fiberboard; and the insulation sleeve one (73), the insulation sleeve two (74), the insulation sleeve three (77) and the furnace door (75) are all fixed with an outer shell, and the outer shell is made of Q235 steel plate.

9. The near-isothermal forging system for large disc forgings of heavy hydraulic press according to claim 7, characterized in that: A sealing barrel (76) is provided between one end of the lower furnace body (64) away from the upper furnace body (63) and the lower die base (11); one end of the sealing barrel (76) is fixedly connected to the lower furnace body (64), and the other end of the sealing barrel (76) is fixedly connected to the lower die base (11).

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