Punch forming machine for aluminum alloy die forgings

Abstract

The invention discloses a double-station automatic stamping forming machine which comprises a rack and two lower die frames, electric boxes used for controlling electrical equipment of the stamping forming machine are fixedly installed on the two sides of the rack, two working cavities are formed in the rack and separated through a partition plate, the number of the lower die frames is two, and the two lower die frames are fixedly installed on the rack. The two lower die frames are fixedly installed in the two working cavities in the rack correspondingly, lower die installation positions used for installing stamping lower dies are arranged on the lower die frames, and first pneumatic plug pins are fixedly installed on the two sides of each lower die installation position correspondingly. According to the automatic stamping forming machine, the stamping efficiency of a workpiece is improved through the automatic stamping forming machine with the two station combinations, an automatic die forging die is convenient to replace and install, and the safety and reliability of the die during installation and use are improved; a mounting structure of an upper die automatic insertion heavy load interface is improved, so that the mounting structure is always attached to and butted with an upper die, and the reliability of the upper die during stamping work is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of punch forming machines, more particularly to a double-station automatic punch forming machine. BACKGROUND

[0002] Punch forming technology is one of the key processes for metal processing in manufacturing, especially widely used in the production of aluminum alloy die forgings. Aluminum alloy has the advantages of low density, high strength, good corrosion resistance, etc., and its demand in the fields of aerospace, automobile industry and electronic equipment is increasing. Therefore, higher requirements are put forward for the precision, quality and production efficiency of aluminum alloy die forgings.

[0003] Traditional punch forming machines usually adopt single-station design, and the function is relatively single, which is difficult to adapt to the production demand of multi-variety, small batch or high rhythm. When performing punch work on workpieces of different specifications, the mold needs to be frequently replaced, and the installation, centering and fixing process of the traditional mold is cumbersome and time-consuming, which seriously affects the production efficiency. In addition, the hydraulic, pneumatic and electrical connection between the mold and the main machine is mostly completed manually by manpower, which not only has low efficiency, but also has the risk of unreliable connection and easy interference wear, which is difficult to ensure the stability of the punch process and the consistency of the product. Therefore, there is an urgent need in the art for a punch forming equipment with high automation degree, high production efficiency, high safety and reliability, and capable of realizing rapid, accurate and stable mold changing and interface connection, to meet the challenges of high-quality and high-efficiency production of aluminum alloy die forgings in modern manufacturing industry. SUMMARY

[0004] In view of the problems existing in the prior art, the purpose of the present application is to provide a double-station automatic punch forming machine for aluminum alloy die forgings, which can automatically, quickly and accurately complete all mechanical, hydraulic and electrical connections by setting an upper mold automatic plug-in heavy load interface, thereby improving the safety and reliability of the mold during installation and use, and solving the above background technical problems.

[0005] To achieve the above purpose, the present application adopts the following technical solutions: A punch forming machine for aluminum alloy die forgings, comprising: A rack, both sides of the rack are fixedly installed with an electrical box for controlling the electrical equipment of the punch forming machine, two working cavities are provided in the rack, and the two working cavities are separated by a partition plate; A lower mold frame, the number of the lower mold frame is two, the two lower mold frames are respectively fixedly installed in the interiors of the two working cavities in the rack, a lower mold mounting position for mounting a punch lower mold is provided on the lower mold frame, and first pneumatic latches are fixedly installed on both sides of the lower mold mounting position; Two upper slides are respectively slidably installed in the two working cavities of the rack, and the bottom of each upper slide is provided with an upper die mounting position for mounting a stamping upper die. Two lifting mechanisms are fixedly installed on the top of the rack, and each lifting mechanism comprises a servo motor and a speed reducer.

[0006] As a further description of the above technical solution: The front and back of the rack are fixedly installed with two groups of safety gratings, and four groups of safety gratings are respectively located on the two sides of the front and back of the two working cavities.

[0007] As a further description of the above technical solution: Two groups of guide rails are fixedly installed in the rack, and two groups of guide rails are respectively located in the two working cavities.

[0008] As a further description of the above technical solution: A safety lock mechanism is installed in the rack, and the safety lock mechanism comprises a safety lock cylinder fixedly installed in the rack.

[0009] As a further description of the above technical solution: The front of the two groups of guide rails is fixedly connected with a rack, and the side of the rack is connected with a clamping block.

[0010] As a further description of the above technical solution: The upper die mounting position of the upper slide is provided with an upper die automatic insertion and heavy load interface, two hot air interfaces, a first waterway interface and a first airway interface.

[0011] As a further description of the above technical solution: The lower die mounting position of the lower die frame is provided with a lower die manual heavy load interface, a second waterway interface and a second gasway interface, and the second waterway interface and the second gasway interface are located at the rear side of the lower die mounting position.

[0012] As a further description of the above technical solution: The upper die automatic insertion heavy load interface is provided with a mounting groove for mounting the upper die automatic insertion heavy load interface on the upper die mounting position of the upper slide frame, two positioning columns are integrally formed on the inner wall of the mounting groove, the upper die automatic insertion heavy load interface is provided with a positioning hole matched with the positioning columns for insertion, the upper die automatic insertion heavy load interface comprises a hydraulic pipe joint, a pneumatic pipe joint and an electrical communication joint, the hydraulic pipe joint and the pneumatic pipe joint are in communication with the inside of the positioning hole, and an electromagnetic valve is mounted on the connection channel of the hydraulic pipe joint and the pneumatic pipe joint and the positioning hole.

[0013] As a further description of the above technical solution: The positioning column is integrally formed by two round rods, the diameter of the lower round rod is smaller than that of the upper round rod, and a circular arc transition is adopted at the connection between the two round rods, a pressure sensor group is fixedly installed on the positioning column, the pressure sensor group is located at the circular arc transition between the two round rods, and a piston ring is bonded at the hole opening position of the positioning hole. The pressure sensor group comprises a contact type pressure sensor and a thin film type force sensor installed along the circular arc transition surface of the two round rods, the contact type pressure sensor is used for detecting the contact type pressure sensor of the internal gas pressure or hydraulic pressure, and the thin film type pressure sensor is used for detecting the extrusion force of the piston ring on the positioning column during the process of passing through the circular arc transition surface of the two round rods.

[0014] As a further description of the above technical solution: The upper slide frame is provided with uniformly distributed stable holes in the bottom, a pull rod is arranged in the stable hole, the bottom end of the pull rod is fixedly connected with the upper die through bolts, a piston sliding block is arranged on the top of the pull rod and is slidingly connected in the stable hole, uniformly distributed air holes are arranged on the upper slide frame and are in communication with the inside of the stable holes, the communication position of the air holes and the stable holes is below the piston sliding block, the air holes are connected with the pneumatic pipe joint through pipelines, a positioning pin is slidingly connected on the pull rod, the positioning pin is clamped with the piston sliding block, the bottom of the positioning pin is provided with an inclined surface, a communication hole is arranged in the pull rod, the communication hole is used for connecting the stable hole and the mounting position of the positioning pin, and the communication position of the communication hole and the stable hole is below the piston sliding block.

[0015] Compared with the prior art, the advantages of the present application are: (1) The scheme, through the automatic stamping forming machine composed of two workstations, improves the stamping forming efficiency of the aluminum alloy workpiece, and facilitates the replacement and installation of the automatic stamping die, improves the safety and reliability of the die during installation and use.

[0016] (2) The scheme, by setting the upper die automatic plug heavy load interface, can automatically, quickly and accurately complete all mechanical, hydraulic and electrical connections, and ensure that the upper die automatic plug heavy load interface is always matched with the upper die, to ensure the reliability of the upper die during stamping work. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of a stamping forming machine; Figure 2 is a front view structural schematic view of a stamping forming machine; Figure 3 is a structural schematic view of a lower die holder; Figure 4 is a structural schematic view of an upper slide; Figure 5 is a connection structure schematic view of the upper slide and the upper die automatic plug heavy load interface; Figure 6 is a structural schematic view of the upper slide and the upper die automatic plug heavy load interface; Figure 2 Figure 7 is a connection structure schematic view of the upper slide and the upper die automatic plug heavy load interface.

[0018] Explanation of reference numerals in the drawing: 100, rack; 110, electrical box; 120, safety grating; 130, guide rail; 131, rack; 132, clamping block; 133, anti-falling cylinder; 140, guide column; 200, lower die holder; 210, first pneumatic bolt; 220, lower die manual heavy load interface; 230, second waterway interface; 240, second airway interface; 300, upper slide; 310, second pneumatic bolt; 320, upper die automatic plug heavy load interface; 321, positioning hole; 322, electromagnetic valve; 323, piston ring; 330, hot air interface; 340, first waterway interface; 350, first airway interface; 360, mounting groove; 370, positioning column; 371, pressure sensor group; 380, stabilizing hole; 381, air hole; 390, pull rod; 391, piston sliding block; 392, positioning pin; 393, communication hole; 400, lifting mechanism; 410, servo motor; 420, speed reducer; 430, lifting rod; 500, safety lock mechanism; 510, safety lock cylinder; 520, die locking hook. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. ​

[0020] Referring to Figures 1-7 The present application provides Example 1: In order to meet the production needs of parts in the fields of aerospace, automobile industry and electronic equipment, in view of the monotony of the processing of the current punch forming machine, a punch forming machine for aluminum alloy die forgings is proposed, comprising: The rack 100 is fixedly installed with an electric box 110 for controlling electrical equipment of the punch forming machine on both sides, and the controlled electrical equipment includes but is not limited to the following equipment. The specific control connection mode is the existing well-known mature technology. Two working cavities are arranged in the rack 100, and the two working cavities are separated by a partition to form two stations. Two sets of independently operated stations can perform single workpiece continuous punching work or multi-workpiece synchronous punching work. The lower die holder 200 is two in number, and the two lower die holders 200 are respectively fixedly installed in the interiors of the two working cavities of the rack 100. The lower die holder 200 is provided with a lower die mounting position for mounting a punch lower die, and the two sides of the lower die mounting position are fixedly installed with first pneumatic bolts 210. The upper slide 300 is two in number, and the two upper slides 300 are respectively slidingly installed in the interiors of the two working cavities of the rack 100. The bottom of the upper slide 300 is provided with an upper die mounting position for mounting a punch upper die, and the two sides of the upper die mounting position are fixedly installed with second pneumatic bolts 310. The lifting mechanism 400 is two in number, and the lifting mechanism 400 comprises a servo motor 410 and a speed reducer 420 fixedly installed on the top of the rack 100. The output shaft of the servo motor 410 is fixedly connected with the input shaft of the speed reducer 420. The speed reducer 420 has two output shafts and drives two lifting rods 430 through the two output shafts. The bottom end of the lifting rod 430 extends to the interior of the rack 100 and is fixedly connected with the upper slide 300.

[0021] An automatic stamping forming machine consisting of two workstations can be adapted to aluminum alloy forgings of different specifications, and can also perform simultaneous stamping operations on workpieces of the same specifications at both workstations, thereby improving the stamping efficiency. By placing high-temperature aluminum alloy material between the lower and upper stamping dies, it is directly stamped to obtain high-precision, high-quality die forgings. When installing the automatic stamping die, the lower die is first placed on the lower die mounting position of the lower die holder 200 and positioned by the positioning structure on the lower die mounting position. Then, two first pneumatic pins 210 are inserted into the lower die to complete the fixation. The lower die and upper die are in a closed state during the installation process. The lifting mechanism 400 operates, and the servo motor 410 synchronously drives the lifting rods 430 on both sides through the reducer 420. The driving method can be a connection between a lead screw and a nut. The nut and the output shaft of the reducer 420 rotate through gear transmission, which in turn drives the lifting rods 430 to rise and fall. The lifting rods 430 drive the upper slide 300 to descend, so that it contacts and connects with the top of the upper mold. Then, the second pneumatic pin 310 works to insert into the upper mold to complete the fixation. Then, the upper slide 300 rises to the initial working position to carry out the stamping work. The workpiece is formed by stamping without cutting action, ensuring the integrity of the workpiece.

[0022] Two sets of safety light curtains 120 are fixedly installed on the front and back of the frame 100, and four sets of safety light curtains 120 are located on both sides of the front and back of the two working chambers respectively. Since the front and back of the frame 100 are both open spaces, the entry and exit of objects are monitored by setting a safety light curtain 120. When the mold closing and stamping work is carried out, the safety light curtain 120 can stop in time when an object is detected to enter, reducing safety hazards during mold closing or work and making the operation safer.

[0023] Two sets of guide rails 130 are fixedly installed inside the frame 100. The two sets of guide rails 130 are located inside the two working cavities respectively. The two sides of the two upper slides 300 are slidably connected to the two sets of guide rails 130 respectively. A guide post 140 is fixedly connected between the frame 100 and the lower mold frame 200. The guide post 140 passes through the upper slide 300 and is slidably connected to the upper slide 300. The guide rail 130 allows the upper slide 300 to slide easily inside the frame 100, and the guide column 140 helps to ensure that the upper slide 300 will not tilt or deviate during the sliding process, thus ensuring the lifting stability of the upper slide 300.

[0024] A safety lock mechanism 500 is installed inside the frame 100. The safety lock mechanism 500 includes a safety lock cylinder 510 fixedly installed inside the frame 100. The safety lock cylinder 510 is located on both sides of the top of the working chamber. The output end of the safety lock cylinder 510 is fixedly connected to a mold locking hook 520. By sliding the upper slide 300 to its highest point within the frame 100, the safety lock cylinder 510 can drive the mold locking hook 520 to hook the upper slide 300, forming a safety protection and preventing the upper slide 300 from sliding down.

[0025] Both sets of guide rails 130 are fixedly connected to racks 131 on the front. A locking block 132 is engaged on one side of the rack 131. An anti-fall cylinder 133 is fixedly connected to the side of the locking block 132 away from the rack 131. The anti-fall cylinder 133 is fixedly installed on the top of the upper slide 300. When it is necessary to stabilize the current height of the upper slide 300 and prevent it from falling excessively, the anti-fall cylinder 133 pushes out the locking block 132, so that it contacts the rack 131. When the upper slide 300 has a downward trend, it is restricted by the locking block 132 and the rack 131 and cannot fall, thus further ensuring safety.

[0026] Please see Figures 1-7 Based on Example 1, the present invention also provides Example 2: The upper mold mounting position of the upper slide 300 is provided with an automatic upper mold insertion heavy load interface 320, two hot air interfaces 330, a first water interface 340 and a first air interface 350. The two hot air interfaces 330 are located on both sides of the automatic upper mold insertion heavy load interface 320, and the first water interface 340 and the first air interface 350 are located at the rear side of the upper mold mounting position. The lower mold mounting position of the lower mold frame 200 is provided with a lower mold manual heavy load interface 220, a second water channel interface 230 and a second air channel interface 240. The second water channel interface 230 and the second air channel interface 240 are located on the rear side of the lower mold mounting position.

[0027] The upper mold mounting position of the upper slide 300 is provided with a mounting groove 360 ​​for mounting the automatic upper mold insertion heavy-duty interface 320. The inner wall of the mounting groove 360 ​​is integrally formed with two positioning posts 370. The automatic upper mold insertion heavy-duty interface 320 is provided with positioning holes 321 that match the positioning posts 370. The automatic upper mold insertion heavy-duty interface 320 includes a hydraulic pipe connector, a pneumatic pipe connector, and an electrical communication connector. Both the hydraulic pipe connector and the pneumatic pipe connector are connected to the interior of the positioning holes 321. The connection channels between the hydraulic pipe connector and the pneumatic pipe connector and the positioning holes 321 are all installed... The upper mold is equipped with a solenoid valve 322. After the upper mold automatic insertion heavy-duty interface 320 is initially fixed inside the mounting groove 360, this initial fixing method can be achieved by using external tools or equipment to adapt and clamp the upper mold automatic insertion heavy-duty interface 320. After the upper mold is installed, the external tools or equipment for clamping the upper mold automatic insertion heavy-duty interface 320 can be removed. When installing the upper mold, the upper mold bottom mounting groove 360 ​​is used to make the top of the upper mold contact the bottom of the upper mold automatic insertion heavy-duty interface 320, thereby preventing the upper mold automatic insertion heavy-duty interface 320 from detaching.

[0028] By setting the upper die automatic insertion heavy-duty interface 320, all mechanical, hydraulic and electrical connections can be completed automatically, quickly and accurately. It is a heavy-duty automated quick die change interface system that can withstand the huge weight of the die and the huge impact of the stamping operation. Since the connection between the upper die and the upper slide 300 is fixed by the second pneumatic pin 310, in order to ensure that the upper die automatic insertion heavy-duty interface 320 is always in contact with the insertion port of the upper die, the positioning pin 370 and the positioning hole 321 firstly facilitate the positioning and installation of the upper die automatic insertion heavy-duty interface 320 and prevent misalignment that would prevent the interface from being automatically connected.

[0029] Secondly, opening the solenoid valve 322 allows either the liquid or air source in the hydraulic or pneumatic pipeline joint to enter the positioning hole 321 through the connecting channel. High hydraulic or high air pressure provides downward force to the upper mold automatic insertion heavy-duty interface 320, ensuring it always fits and connects to the upper mold, thus guaranteeing the reliability of the upper mold during stamping. When there is no liquid or air source in the hydraulic or pneumatic pipeline joint, it indicates that die casting is not being performed, and the connection requirements of the upper mold automatic insertion heavy-duty interface 320 are lower in this case.

[0030] The positioning post 370 is integrally formed from two round rods, with the diameter of the lower round rod being smaller than that of the upper round rod. The connection between the two round rods is made of arc transition. A pressure sensor group 371 is fixedly installed on the positioning post 370. The pressure sensor group 371 is located at the arc transition between the two round rods. A piston ring 323 is bonded to the opening of the positioning hole 321.

[0031] The pressure sensor group 371 includes a contact pressure sensor and a thin-film force sensor circumferentially mounted along the arc transition surface of the two round rods. The contact pressure sensor is used to detect the air pressure or hydraulic pressure inside the positioning hole 321, and the thin-film force sensor is used to detect the squeezing force of the piston ring 323 on the positioning post 370 as it passes over the arc transition surface of the two round rods. Furthermore, it can be forcibly removed by adhesive bonding, and after cleaning the opening of the positioning hole 321, a new piston ring 323 can be installed. The positioning post 370, which is narrower at the bottom and wider at the top, is easy to insert into the positioning hole 321. The smooth transition between the two round rods facilitates the piston ring 323 to fit smoothly against the outer surface of the upper round rod for sealing, ensuring stable pressure and preventing leakage of liquid or gas sources.

[0032] The pressure sensor group 371 plays different roles at different stages: When installing the upper mold automatic insertion heavy-duty interface 320, the positioning post 370 of the upper mold automatic insertion heavy-duty interface 320 will be inserted into the positioning hole 321 on the upper mold automatic insertion heavy-duty interface 320. Due to the shape design of the positioning post 370, a sealing state will gradually be formed at the arc transition of the piston ring 323 through the positioning post 370. However, the thin film force sensor first briefly contacts the piston ring 323 to form a pressure value. According to the duration and magnitude of the pressure value, the system can control the servo motor 410 of the lifting mechanism 400 to instantly reduce its speed, realize soft contact and gentle introduction, avoid hard collision caused by small deviations, thus give the mold docking process a tactile feel, realize intelligent and compliant control, greatly reduce the extreme dependence on positioning accuracy and mechanical rigidity, and protect the precision positioning post 370 and interface.

[0033] Furthermore, the positioning pin 370 continues to be inserted into the positioning hole 321, compressing the gas. Therefore, during the docking process in a sealed state, the reading of the contact pressure sensor should be proportional to the docking speed curve. Thus, it can be determined that: if the pressure value is within the preset normal range, it indicates that the docking is good and the seal is reliable; if the pressure is too low, the background alarm will indicate that the docking is not in place or the piston ring 323 is worn; if the pressure rises abnormally, it may indicate that the docking is misaligned or there is mechanical interference.

[0034] Since the positioning hole 321 is supplied with a constant downward pressure by an external liquid / gas source through a solenoid valve 322, the piston ring 323 may wear during long-term operation, and temperature changes may affect the material dimensions. After integrating the pressure sensor group 371, the system can form a closed-loop control: using the actual force fed back by the contact pressure sensor as a reference, the opening of the solenoid valve 322 or the pressure of the liquid / gas source is dynamically adjusted to ensure that the interface mating force is always kept at the optimal value throughout the entire working cycle. This gives the interface the ability to self-adapt and fit, and can self-compensate for wear and external interference, raising the reliability and consistency of the mating to a new level.

[0035] The system records the pressure data from the contact pressure sensor during each docking. If it is found that the external supply pressure required to maintain the standard pressure is slowly increasing, or the pressure data fluctuations are becoming larger, this may be an early sign of piston ring 323 aging, locating pin 370 slight deformation, or guide rail 130 wear. The data change curve can be used to determine whether piston ring 323 needs to be replaced.

[0036] The bottom of the upper slide 300 has evenly distributed stabilizing holes 380. A pull rod 390 is installed inside each stabilizing hole 380. The bottom end of the pull rod 390 is fixedly connected to the upper mold by bolts. A piston slider 391 is slidably connected to the inside of the stabilizing hole 380 at the top of the pull rod 390. The upper slide 300 has evenly distributed air holes 381, which communicate with the interior of the stabilizing holes 380. The connection point between the air holes 381 and the stabilizing holes 380 is located at the piston... Below the slider 391, the air hole 381 is connected to the pneumatic pipeline connector through a pipe. A positioning pin 392 is slidably connected to the pull rod 390. The positioning pin 392 is engaged with the piston slider 391. The bottom of the positioning pin 392 is provided with a slope. A connecting hole 393 is opened inside the pull rod 390. The connecting hole 393 is used to connect the stabilizing hole 380 and the mounting position of the positioning pin 392. The connection between the connecting hole 393 and the stabilizing hole 380 is located below the piston slider 391.

[0037] An external air source connected via a pneumatic pipe connector allows high-pressure gas to be injected into the stabilizing hole 380 through the air port 381. The high-pressure environment inside the stabilizing hole 380 pushes the piston slider 391 upward. Since the piston slider 391 is engaged with the pull rod 390 through the positioning pin 392, it drives the pull rod 390 to pull upward. Since the bottom of the pull rod 390 is fixed to the upper mold, it drives the upper mold to move upward and fit against the lower surface of the upper slide 300, further improving the stability of the upper mold during and after installation. During disassembly, disconnect the external air source and open the second pneumatic pin 310. Then, after depressurizing the stabilizing hole 380, the pull rod 390 drives the piston slider 391 to move down until the positioning pin 392 contacts the inner wall edge of the stabilizing hole 380. Due to the inclined bottom surface of the positioning pin 392, the positioning pin 392 can be squeezed into the installation position. After the piston slider 391 is no longer restricted by the positioning pin 392, it disengages from the pull rod 390, so that the pull rod 390 can be pulled out from the stabilizing hole 380. Then, the upper mold can be replaced and repaired. Compared with the traditional bolt fixing method, disassembly and assembly are more convenient. With the second pneumatic pin 310, it is both stable and reliable and improves the fit between the upper mold and the upper slide 300.

[0038] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A double station automatic press forming machine, characterized in that, The utility model relates to a stamping forming machine, including: A rack (100) is fixedly installed with an electric box (110) for controlling the electrical equipment of a stamping forming machine on both sides of the rack (100), two working cavities are arranged in the rack (100), and the two working cavities are separated by a partition plate; Two lower die racks (200) are fixedly installed in the interiors of the two working cavities of the rack (100), a lower die mounting position for mounting a stamping lower die is arranged on the lower die rack (200), and first pneumatic bolts (210) are fixedly installed on both sides of the lower die mounting position; Two upper sliding racks (300) are slidingly installed in the interiors of the two working cavities of the rack (100), an upper die mounting position for mounting a stamping upper die is arranged on the bottom of the upper sliding rack (300), and second pneumatic bolts (310) are fixedly installed on both sides of the upper die mounting position; Two lifting mechanisms (400) are fixedly installed on the top of the rack (100), the lifting mechanism (400) comprises a servo motor (410) and a speed reducer (420), the output shaft of the servo motor (410) is fixedly connected to the input shaft of the speed reducer (420), the speed reducer (420) has two output shafts and drives two lifting rods (430) through the two output shafts, and the bottom end of the lifting rod (430) extends to the interior of the rack (100) and is fixedly connected to the upper sliding rack (300).

2. A double station automatic press forming machine according to claim 1, characterized in that: Two groups of safety gratings (120) are fixedly installed on the front and back of the rack (100), and four groups of safety gratings (120) are arranged on the two sides of the front and back of the two working cavities.

3. A double station automatic press forming machine according to claim 1, characterized in that: Two groups of guide rails (130) are fixedly installed in the interiors of the two working cavities, the two sides of the two upper sliding racks (300) are slidingly connected to the two groups of guide rails (130), guide columns (140) are fixedly connected between the rack (100) and the lower die rack (200), and the guide columns (140) penetrate the upper sliding rack (300) and are slidingly connected to the upper sliding rack (300).

4. The double station automatic press forming machine according to claim 1, characterized in that: A safety lock mechanism (500) is installed in the interior of the rack (100), the safety lock mechanism (500) comprises a safety lock cylinder (510) fixedly installed in the interior of the rack (100), the safety lock cylinder (510) is arranged on the two sides of the top of the working cavity, and a die locking hook (520) is fixedly connected to the output end of the safety lock cylinder (510).

5. A double station automatic press forming machine according to claim 3, characterized in that: The front of the two groups of guide rails (130) is fixedly connected with a rack (131), a clamping block (132) is clamped on one side of the rack (131), an anti-falling cylinder (133) is fixedly connected to the side, away from the rack (131), of the clamping block (132), and the anti-falling cylinder (133) is fixedly installed on the top of the upper sliding rack (300).

6. A double station automatic press forming machine according to claim 1, characterized in that: The upper die mounting position of the upper slide (300) is provided with an upper die automatic insertion heavy load interface (320), two hot air interfaces (330), a first waterway interface (340) and a first gasway interface (350), the two hot air interfaces (330) are respectively located on the two sides of the upper die automatic insertion heavy load interface (320), and the first waterway interface (340) and the first gasway interface (350) are located on the rear side of the upper die mounting position.

7. A double station automatic press forming machine according to claim 1, characterized in that: The lower die mounting position of the lower die frame (200) is provided with a lower die manual heavy load interface (220), a second waterway interface (230) and a second gasway interface (240), and the second waterway interface (230) and the second gasway interface (240) are located on the rear side of the lower die mounting position.

8. A double station automatic press forming machine according to claim 6, characterized in that: The upper die mounting position of the upper slide (300) is provided with an installation slot (360) for installing the upper die automatic insertion heavy load interface (320), the inner wall of the installation slot (360) is integrally formed with two positioning columns (370), the upper die automatic insertion heavy load interface (320) is provided with a positioning hole (321) matched with the positioning column (370), the upper die automatic insertion heavy load interface (320) includes a hydraulic pipe joint, a pneumatic pipe joint and an electrical communication joint, the hydraulic pipe joint and the pneumatic pipe joint are in communication with the inside of the positioning hole (321), and the hydraulic pipe joint and the pneumatic pipe joint are provided with solenoid valves (322) in the connecting channels of the positioning hole (321).

9. A double station automatic press forming machine according to claim 8, characterized in that: The positioning column (370) is integrally formed by two round rods, the diameter of the lower round rod is smaller than that of the upper round rod, the connecting part between the two round rods is transitioned by an arc, a pressure sensor group (371) is fixedly installed on the positioning column (370), the pressure sensor group (371) is located at the arc transition part between the two round rods, and a piston ring (323) is bonded at the hole opening position of the positioning hole (321). The pressure sensor group (371) includes a contact type pressure sensor and a thin film type pressure sensor installed along the circumferential surface of the arc transition surface of the two round rods, the contact type pressure sensor is used for detecting the contact type pressure sensor of the internal gas pressure or hydraulic pressure of the positioning hole (321), and the thin film type pressure sensor is used for detecting the extrusion force of the piston ring (323) on the positioning column (370) during the process of passing through the arc transition surface of the two round rods.

10. A double station automatic press forming machine according to claim 8, characterized in that: The bottom of the upper slide (300) is provided with uniformly distributed stabilizing holes (380), the inside of the stabilizing holes (380) is provided with pull rods (390), the bottom end of the pull rod (390) is fixedly connected with the upper mold through bolts, the top of the pull rod (390) is provided with a piston sliding block (391) which is slidingly connected in the inside of the stabilizing hole (380), the upper slide (300) is provided with uniformly distributed air holes (381), the air holes (381) are communicated with the inside of the stabilizing holes (380), the communication part of the air holes (381) and the stabilizing holes (380) is below the piston sliding block (391), the air holes (381) are communicated with the pneumatic pipeline joint through pipelines, the pull rod (390) is slidingly connected with a positioning pin (392), the positioning pin (392) is clamped with the piston sliding block (391), the bottom of the positioning pin (392) is provided with an inclined surface, the inside of the pull rod (390) is provided with a communication hole (393), the communication hole (393) is used for communicating the stabilizing holes (380) with the mounting position of the positioning pin (392), the communication part of the communication hole (393) and the stabilizing hole (380) is below the piston sliding block (391).

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