A forging tensile test device

Abstract

The present invention belongs to the technical field of detection equipment, in particular to a tensile test equipment for forgings. Aiming at the poor visibility of the tensile test of forgings and the inability to visually display it, the following scheme is proposed. It includes a base table, on the upper side of which two symmetric columns are fixedly connected. The upper ends of the two columns are fixedly connected to the same top table, and a movable table is arranged between the base table and the top table. Installation tables are arranged above the movable table and below the top table. The two installation tables are symmetrically distributed up and down. Square seats are arranged on both installation tables, and clamping components are arranged on both installation tables. When the tensile test equipment for forgings disclosed by the present invention conducts a tensile test on a forging, the deformation amount feedback component can directly feedback the deformation amount data of the forging under different tensile forces, and adopts the way of liquid column change to visually display it, avoiding the inability to observe due to the inconspicuous deformation amount of the metal forging, and improving the visibility of test data.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and particularly relates to a tensile test equipment for forgings. Background Art

[0002] A forging refers to a workpiece or blank obtained by forging deformation of a metal blank. The common method is to apply pressure to the metal blank to cause plastic deformation and change its mechanical properties. Through forging, the looseness and holes of the metal can be eliminated, and the mechanical properties of the forging can be improved. Forgings can be divided into cold forging and hot forging according to the temperature of the blank during processing. Cold forging is generally processed at room temperature, and hot forging is processed at a temperature higher than the recrystallization temperature of the metal blank.

[0003] A tensile test, also known as a tension test, is a test method for determining the properties of a material under an axial tensile load. The data obtained from the tensile test can be used to determine the elastic limit, elongation, elastic modulus, proportional limit, area reduction, tensile strength, yield point, yield strength, and other tensile property indexes of the material.

[0004] When performing a tensile test on a metal forging, due to the non-deformable characteristics of some metals, its deformation amount is difficult to observe with the naked eye and can only be fed back by computer numerical values. Therefore, the visibility of the tensile test of the forging is poor and cannot be intuitively displayed. Summary of the Invention

[0005] The present invention discloses a tensile test equipment for forgings, aiming to solve the technical problem that the visibility of the tensile test of the forging in the background art is poor and cannot be intuitively displayed.

[0006] A tensile test equipment for forgings proposed by the present invention includes a base table. Two symmetric columns are fixedly connected to the upper side of the base table. The upper ends of the two columns are fixedly connected to the same top table. A movable table is arranged between the base table and the top table. Installation tables are arranged above the movable table and below the top table. The two installation tables are symmetrically distributed up and down. Square seats are arranged on both installation tables. Clamping components are arranged on both installation tables. A deformation amount feedback component is arranged beside the movable table. The deformation amount feedback component includes two side attachment frames, an air box, and a U-shaped liquid pipe. The two side attachment frames are symmetrically distributed on both sides of the air box. The two side attachment frames are fixedly connected to the air box. A U-shaped installation hole is opened inside the base table. The U-shaped liquid pipe is fixedly connected inside the U-shaped installation groove. Both ends of the U-shaped liquid pipe are higher than the upper outer wall of the base table. Oil liquid is arranged inside the U-shaped liquid pipe.

[0007] By providing a bottom platform, a column, a top platform, a movable platform, an installation platform, a square base, a clamping assembly and a deformation amount feedback assembly, when conducting a tensile test on a forging, the deformation amount feedback assembly can directly feedback the deformation amount data of the forging under different tensile forces, and adopt the method of liquid column change to visually display, avoiding the situation that the deformation amount of the metal forging is not obvious and cannot be observed, and improving the visibility of test data.

[0008] In a preferred solution, the air box is provided with a pull hole and an exhaust hole. The pull hole is located on the upper side of the air box, and the exhaust hole is located on the lower side of the air box. The air box is provided with a rectangular hole, and a micro air pump is fixedly connected inside the rectangular hole. And an inner pressure plate is arranged inside the air box. The outer side of the inner pressure plate is a rubber layer. A pull rod is fixedly connected to the upper side of the inner pressure plate. The upper end of the pull rod passes through the pull hole of the air box and is fixedly connected to a side frame. A groove is provided in the square base of the installation platform above the movable platform, and a fixed connection is made between the side frame and the groove of the square base; a round hole is provided in the bottom platform, and a telescopic tube is fixedly connected inside the round hole. The upper end of the telescopic tube is fixedly connected to an installation head, and a fixed connection is made between the installation head and the exhaust hole. The lower end of the telescopic tube is fixedly connected to an air delivery pipe. The air delivery pipe is located inside the bottom platform. And two double-pass connectors are fixedly connected to the outer side of one column. A catheter is connected between the two double-pass connectors. One end of the air delivery pipe is fixedly connected to one double-pass connector. One end of the U-shaped liquid pipe is fixedly connected to the other double-pass connector. The other end of the U-shaped liquid pipe is fixedly connected to a liquid column feedback pipe.

[0009] By providing a deformation amount feedback assembly, the deformation amount feedback assembly directly feedbacks the deformation amount of the forging by using the liquid level change in the liquid column feedback pipe, so as to visually display the deformation amount data, avoid the situation that the deformation amount of the metal forging is not obvious and cannot be observed, and improve the visibility of test data; the inner cavity and cross-sectional area of the air box are increased, and when the inner pressure plate moves, more air can be pushed out of the air box, so as to achieve the effect of amplifying the deformation amount feedback data and making the liquid level change in the liquid column feedback pipe more obvious; the micro air pump can adjust the air pressure in the air box to ensure that the U-shaped pipe can be in a state of level liquid level at the initial time.

[0010] In a preferred solution, two symmetrical installation grooves are provided on the movable platform. Two arc-shaped frames are fixedly connected inside the two installation grooves. The two arc-shaped frames are respectively located above the two side attachment frames. Two symmetrical round holes are provided on each of the two arc-shaped frames. And two symmetrical sliding rods are fixedly connected to the upper sides of the two side attachment frames. The sliding rods are respectively movably connected inside the round holes of the arc-shaped frames. The upper ends of the two sliding rods on the same side are fixedly connected to the same top block. Return springs are sleeved on the outer sides of the sliding rods. The two ends of the return springs are respectively fixedly connected to the lower side of the top block and the upper side of the arc-shaped frame.

[0011] By providing a bent arc frame and a side attachment frame, the bent arc frame and the side attachment frame are movably connected by a sliding rod and a return spring. While ensuring their overall synchronous movement, it meets the small-range relative displacement between the movable platform and the side attachment frame during the test, thus ensuring the feasibility of the pull rod driving the inner pressure plate to move downward in the air box.

[0012] In a preferred solution, locking components are provided on both of the said side attachment frames, and the two locking components are symmetrically distributed; the locking component includes a displacement sliding seat and a flipping frame. The displacement sliding seat is located on the side attachment frame. Vertical sliding grooves are opened on both of the two columns. The two displacement sliding seats are respectively movably connected in the vertical sliding grooves on the two columns. Locking buckle grooves are opened on opposite sides of the two columns. The locking buckle grooves are located beside the vertical sliding grooves. The flipping frame is movably connected to the side attachment frame. A buckle plate is fixedly connected to the front end of the flipping frame. The buckle plate is clamped with the locking buckle groove. A locking hydraulic cylinder is fixedly connected to the side of the side attachment frame far from the displacement sliding seat. The telescopic end of the locking hydraulic cylinder is fixedly connected with a movable block, and the movable block is movably connected with the flipping frame.

[0013] By providing a locking component, the locking component uses a locking hydraulic cylinder to drive the two flipping frames to flip. After the flipping frames flip, they contact and are clamped and fixed with the locking buckle grooves of the columns through the buckle plates, realizing the position fixation of the side attachment frame and ensuring the normal operation of the deformation variable feedback component during subsequent tests; adopting the clamping and fixing method of the buckle plate and the locking buckle groove is convenient for quickly changing the fixed state of the side attachment frame and improves the convenience of the device during the test process.

[0014] In a preferred solution, the clamping component includes two clamping seats and two limiting seats. The two clamping seats and the two limiting seats are symmetrically distributed inside the mounting table. The two limiting seats are fixedly connected to the mounting table. Sliding grooves are opened on opposite sides of the two clamping seats. The clamping seats and the limiting seats on the same side are movably connected. Clamping heads are provided on opposite sides of the two clamping seats. Opening and closing grooves are opened on both of the two clamping seats. The opening and closing grooves on the two clamping seats are symmetrically distributed. The same opening and closing plate is movably connected inside the opening and closing grooves on the two clamping seats; concave holes are opened on the square seats. The direction of the concave holes is towards the side close to the clamping seats. Opening and closing hydraulic cylinders are fixedly connected inside the concave holes. The telescopic ends of the opening and closing hydraulic cylinders are fixedly connected with the opening and closing plate. An attachment seat is fixedly connected to the opening and closing plate. A non-detachable hydraulic cylinder is fixedly connected to the attachment seat. The telescopic end of the non-detachable hydraulic cylinder is on the side far from the opening and closing plate. The telescopic end of the non-detachable hydraulic cylinder is fixedly connected with a mounting seat, and a contact sensor is fixedly connected to the mounting seat.

[0015] By providing a clamping assembly, the clamping assembly utilizes two synchronously moving clamping seats to achieve clamping and fixing of the forging under the drive of an opening and closing hydraulic cylinder. The two clamping seats are in an inverted triangle shape, which can transmit the bearing force to the side limiting seats after clamping, improving the clamping stability and avoiding the situation of deformation and damage of a simple clamping seat due to excessive force during a tensile test.

[0016] In a preferred solution, the top platform is fixedly connected to the installation platform, and two symmetrical sliding holes are provided on the movable platform. Two symmetrical sliding columns are fixedly connected to the lower side of the installation platform above the movable platform. The two sliding columns are respectively movably connected inside the two sliding holes, and a pressure sensor is arranged between the two sliding columns. The two ends of the pressure sensor are respectively fixedly connected between the installation platform and the movable platform; Two symmetrical upper platforms are fixedly connected to the upper side of the bottom platform. The two upper platforms are respectively located inside the two columns. Lifting rods are movably connected between the two upper platforms and the top platform. Two symmetrical threaded holes are provided on the movable platform. The two lifting rods are rotationally connected through the inner wall threads inside the two threaded holes of the movable platform. The lower ends of the two lifting rods are fixedly connected with rotating shafts, and driving gears are fixedly connected to the outside of the rotating shafts. A cavity is provided inside the bottom platform, and a driving motor is fixedly connected to the inside of the cavity. The output end of the driving motor is connected with a short shaft through a coupling, and a driving gear is fixedly connected to the other end of the short shaft. The driving gear is meshed with the two driving gears through tooth grooves.

[0017] As can be seen from the above, when the forging tensile test equipment provided by the present invention conducts a tensile test on a forging, the deformation amount feedback component can directly feedback the deformation amount data of the forging under different tensile forces, and adopts the method of liquid column change to visually display, avoiding the situation that the deformation amount of the metal forging is not obvious and cannot be observed, and improving the visibility of test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a forging tensile test equipment proposed by the present invention;

[0019] Figure 2 It is a front view structure schematic diagram of a forging tensile test equipment proposed by the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the movable platform of a forging tensile test equipment proposed by the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the side attachment frame and the air box of a forging tensile test equipment proposed by the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the bottom platform of a forging tensile test equipment proposed by the present invention;

[0023] Figure 6 Schematic diagram of the gas transmission pipe and U-shaped liquid pipe structure of a tensile test device for forgings proposed by the present invention;

[0024] Figure 7 Schematic diagram of the locking component structure of a tensile test device for forgings proposed by the present invention;

[0025] Figure 8 Schematic diagram of the installation table structure of a tensile test device for forgings proposed by the present invention;

[0026] Figure 9 Schematic diagram of the chuck and opening / closing plate structure of a tensile test device for forgings proposed by the present invention;

[0027] Figure 10 Schematic diagram of the cross-sectional structure of the bottom table of a tensile test device for forgings proposed by the present invention.

[0028] In the figure: 1. Bottom table; 2. Column; 3. Top table; 4. Movable position table; 5. Installation table; 6. Square seat; 7. Clamping assembly; 701. Chuck; 702. Limit seat; 703. Collet; 704. Opening / closing slot; 705. Opening / closing plate; 706. Opening / closing type hydraulic cylinder; 707. Auxiliary seat; 708. Anti-detachment hydraulic cylinder; 709. Installation seat; 710. Contact sensor; 8. Deformation amount feedback assembly; 801. Side attachment frame; 802. Air tank; 803. Pulling hole; 804. Exhaust hole; 805. Inner pressure plate; 806. Pulling rod; 807. Side frame; 808. Micro air pump; 809. Installation head; 810. Telescopic tube; 811. Gas transmission pipe; 812. Double-pass connector; 813. U-shaped liquid pipe; 814. Liquid column feedback pipe; 9. Curved arc frame; 10. Slide bar; 11. Top block; 12. Return spring; 13. Locking component; 1301. Shifting slide seat; 1302. Flipping frame; 1303. Locking buckle groove; 1304. Buckle plate; 1305. Locking type hydraulic cylinder; 1306. Movable position block; 14. Slide column; 15. Slide hole; 16. Pressure sensor; 17. Upper table; 18. Lifting rod; 19. Rotating shaft; 20. Driving gear; 21. Driving motor; 22. Driving gear. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0030] A tensile test device for forgings disclosed by the present invention is mainly applied to scenarios where the visibility of the tensile test of forgings is poor and cannot be intuitively displayed.

[0031] Refer to Figure 1-10, A tensile test device for forgings, comprising a base 1. Two symmetric columns 2 are bolted to the upper side of the base 1. The upper ends of the two columns 2 are bolted to the same top platform 3. A movable platform 4 is arranged between the base 1 and the top platform 3. Installation platforms 5 are arranged above the movable platform 4 and below the top platform 3. The two installation platforms 5 are symmetrically distributed up and down. Square seats 6 are arranged on both installation platforms 5. Clamping assemblies 7 are arranged on both installation platforms 5. A deformation amount feedback assembly 8 is arranged beside the movable platform 4. The deformation amount feedback assembly 8 includes two side attachment frames 801, an air box 802 and a U-shaped liquid pipe 813. The two side attachment frames 801 are symmetrically distributed on both sides of the air box 802. The two side attachment frames 801 are bolted to the air box 802. A U-shaped installation hole is formed inside the base 1. The U-shaped liquid pipe 813 is located inside the U-shaped installation groove and is bolted. Both ends of the U-shaped liquid pipe 813 are higher than the upper outer wall of the base 1. Oil liquid is arranged inside the U-shaped liquid pipe 813.

[0032] Specifically, use the clamping assembly 7 on the top platform 3 to fix the forging from the upper end, then adjust the position of the movable platform 4, and use the clamping assembly 7 on the movable platform 4 to fix the lower end of the forging. After the fixation is completed, adjust the deformation amount feedback assembly 8 to make it in a working state. After completion, conduct a tensile test on the forging; when the device conducts a tensile test on the forging, the deformation amount feedback assembly 8 can directly feedback the deformation amount data of the forging under different tensile forces, and adopt the way of liquid column change to visually display, avoiding the situation that the deformation amount of the metal forging is not obvious and cannot be observed, and improving the visibility of the test data.

[0033] Refer to Figure 3 , Figure 4 , Figure 5 and Figure 6, a draw hole 803 and an exhaust hole 804 are provided on the air box 802. The draw hole 803 is located on the upper side of the air box 802, and the exhaust hole 804 is located on the lower side of the air box 802. A rectangular hole is provided on the air box 802, and a micro air pump 808 is connected inside the rectangular hole by bolts. And an inner pressure plate 805 is arranged inside the air box 802. The outer side of the inner pressure plate 805 is a rubber layer. A draw rod 806 is connected to the upper side of the inner pressure plate 805 by bolts. The upper end of the draw rod 806 passes through the draw hole 803 of the air box 802 and is connected to a side frame 807 by bolts. A groove is provided on the square seat 6 of the mounting table 5 above the movable table 4. The side frame 807 is connected to the groove of the square seat 6 by bolts; a round hole is provided on the bottom table 1, and a telescopic tube 810 is connected inside the round hole by bolts. The upper end of the telescopic tube 810 is connected to a mounting head 809 by bolts. The mounting head 809 is connected to the exhaust hole 804 by bolts. The lower end of the telescopic tube 810 is connected to an air delivery pipe 811. The air delivery pipe 811 is located inside the bottom table 1. And two double-pass connectors 812 are connected to the outside of one column 2 by bolts. The two double-pass connectors 812 are connected by a conduit. One end of the air delivery pipe 811 is connected to one double-pass connector 812 by bolts. One end of the U-shaped liquid pipe 813 is connected to the other double-pass connector 812 by bolts. The other end of the U-shaped liquid pipe 813 is connected to a liquid column feedback pipe 814 by bolts.

[0034] Specifically, during the movement of the movable table 4, the side attachment frame 801 and the air box 802 move synchronously with it. After the forging is clamped and fixed, wait for the states of the side attachment frame 801 and the air box 802 to be stable, and then fix the positions of the two side attachment frames 801. Then observe whether the liquid levels in the U-shaped liquid pipe 813 are the same (that is, whether the liquid level is at the zero scale line position of the liquid column feedback pipe 814). If the liquid levels are different, use the micro air pump 808 to adjust the air pressure inside the air box 802 until the liquid levels in the U-shaped liquid pipe 813 are flush; during the tensile test, when the forging deforms under the action of tensile force, the side frame 807 will drive the draw rod 806 to press down the inner pressure plate 805. The inner pressure plate 805 moves downward, and the gas inside the air box 802 is compressed and enters the mounting head 809 from the exhaust hole 804. Then it enters the U-shaped liquid pipe 813 through the telescopic tube 810, the air delivery pipe 811 and the two double-pass connectors 812. The liquid level in the U-shaped liquid pipe 813 changes, and the liquid level of the liquid column feedback pipe 814 rises. The rising value reflects the amount of deformation of the forging.

[0035] In a specific application scenario, the deformation amount feedback component 8 is applicable to the deformation amount feedback link during the tensile test of forgings. That is, the deformation amount feedback component 8 directly feeds back the deformation amount of the forging by using the liquid level change in the liquid column feedback pipe 814, so as to visually display the deformation amount data, avoid the situation that the deformation amount of the metal forging is not obvious and cannot be observed, and improve the visibility of the test data; the inner cavity and the cross-sectional area of the inner pressure plate 805 of the air box 802 are increased. When the inner pressure plate 805 displaces, more air can be pushed out of the air box 802, so as to achieve the effect of amplifying the deformation amount feedback data and making the liquid level change in the liquid column feedback pipe 814 more obvious; the micro air pump 808 can adjust the air pressure in the air box 802 to ensure that the U-shaped tube can be in the state of level liquid level at the initial time.

[0036] Refer to Figure 3 、 Figure 4 and Figure 7 , two symmetric installation grooves are formed on the movable platform 4, and bending arc frames 9 are respectively connected inside the two installation grooves by bolts. The two bending arc frames 9 are respectively located above the two side attachment frames 801. Two symmetric round holes are formed on each of the two bending arc frames 9, and two symmetric sliding rods 10 are respectively connected to the upper sides of the two side attachment frames 801 by bolts. The sliding rods 10 are respectively slidably connected inside the round holes of the bending arc frames 9. The upper ends of the two sliding rods 10 on the same side are connected to the same top block 11 by bolts. Return springs 12 are sleeved on the outer parts of the sliding rods 10, and the two ends of the return springs 12 are respectively connected to the lower side of the top block 11 and the upper side of the bending arc frame 9 by bolts.

[0037] Specifically, when the forging is deformed under force, since the two side attachment frames 801 are fixed, the downward movement of the movable platform 4 will drive the bending arc frame 9 to move downward. The bending arc frame 9 slides down on the sliding rods 10, and the return spring 12 is stretched to generate elastic deformation; the bending arc frame 9 and the side attachment frame 801 are movably connected by the sliding rods 10 and the return springs 12. While ensuring their overall synchronous movement, it meets the small-range relative displacement between the movable platform 4 and the side attachment frame 801 during the test, so as to ensure the feasibility of the pull rod 806 driving the inner pressure plate 805 to move downward in the air box 802.

[0038] Refer to Figure 3 、 Figure 4 and Figure 7, locking components 13 are provided on both of the two side attachment frames 801, and the two locking components 13 are symmetrically distributed; the locking component 13 includes a displacement sliding seat 1301 and a flipping frame 1302. The displacement sliding seat 1301 is located on the side attachment frame 801. Vertical sliding grooves are provided on both of the two columns 2. The two displacement sliding seats 1301 are respectively slidably connected in the vertical sliding grooves on the two columns 2. Locking buckle grooves 1303 are provided on opposite sides of the two columns 2. The locking buckle grooves 1303 are located beside the vertical sliding grooves. The flipping frame 1302 is rotatably connected to the side attachment frame 801 through a bearing. A buckle plate 1304 is connected to the front end of the flipping frame 1302 by bolts. The buckle plate 1304 is clamped with the locking buckle groove 1303. A locking hydraulic cylinder 1305 is connected to the side of the side attachment frame 801 away from the displacement sliding seat 1301 by bolts. A movable block 1306 is connected to the telescopic end of the locking hydraulic cylinder 1305 by bolts. The movable block 1306 is movably connected to the flipping frame 1302.

[0039] Specifically, during the movement of the movable table 4 before the test, the locking component 13 is in an open state; after the states of the side attachment frame 801 and the air box 802 are stable, start the two locking hydraulic cylinders 1305 to extend and push the two flipping frames 1302 to flip towards the column 2, so that the buckle plates 1304 on the two flipping frames 1302 contact and are clamped and fixed with the locking buckle grooves 1303 on the column 2;

[0040] In a specific application scenario, the locking component 13 is applicable to the fixing link of the two side attachment frames 801 before the test, that is, the locking component 13 uses the locking hydraulic cylinder 1305 to drive the two flipping frames 1302 to flip. After the flipping frames 1302 flip, they contact and are clamped and fixed with the locking buckle grooves 1303 of the column 2 through the buckle plates 1304, realizing the position fixing of the side attachment frame 801 and ensuring the normal operation of the deformation variable feedback component 8 during the subsequent test; the method of clamping and fixing with the buckle plate 1304 and the locking buckle groove 1303 is convenient for quickly changing the fixed state of the side attachment frame 801 and improving the convenience of the device during the test process.

[0041] Refer to Figure 3 、 Figure 8 and Figure 9, the clamping assembly 7 includes two clamping seats 701 and two limiting seats 702. The two clamping seats 701 and the two limiting seats 702 are symmetrically distributed inside the mounting table 5. The two limiting seats 702 are bolted to the mounting table 5. On opposite sides of the two clamping seats 701, sliding grooves are provided. The clamping seats 701 and the limiting seats 702 on the same side are slidably connected. On the opposite sides of the two clamping seats 701, clamping heads 703 are provided. On the two clamping seats 701, opening and closing grooves 704 are provided. The opening and closing grooves 704 on the two clamping seats 701 are symmetrically distributed. Inside the opening and closing grooves 704 on the two clamping seats 701, the same opening and closing plate 705 is slidably connected; Concave holes are provided on the square seat 6, and the direction of the concave holes is towards the side close to the clamping seat 701. Inside the concave holes, opening and closing hydraulic cylinders 706 are bolted. The telescopic end of the opening and closing hydraulic cylinder 706 is bolted to the opening and closing plate 705. On the opening and closing plate 705, an attachment seat 707 is bolted. On the attachment seat 707, a non-detachable hydraulic cylinder 708 is bolted. The telescopic end of the non-detachable hydraulic cylinder 708 is on the side away from the opening and closing plate 705. The telescopic end of the non-detachable hydraulic cylinder 708 is bolted to a mounting seat 709. On the mounting seat 709, a contact sensor 710 is bolted.

[0042] Specifically, the forging is placed between the two clamping seats 701. The opening and closing hydraulic cylinder 706 is started to extend and push the opening and closing plate 705 forward. The two clamping seats 701 move along with the opening and closing plate 705. Limited by the limiting seats 702, the two clamping seats 701 move closer to each other until the clamping heads 703 clamp and fix the forging; When both ends of the forging are fixed, the two non-detachable hydraulic cylinders 708 are started to extend synchronously. The two contact sensors 710 move closer to each other until the two contact sensors 710 contact the upper and lower ends of the forging, and the signal is fed back and received;

[0043] In a specific application scenario, the clamping assembly 7 is applicable to the clamping and fixing link of the forging, that is, the clamping assembly 7 uses two clamping seats 701 that move synchronously to clamp and fix the forging under the drive of the opening and closing hydraulic cylinder 706. The two clamping seats 701 are in an inverted triangle shape, which can transmit the bearing force to the side limiting seats 702 after clamping, improving the clamping stability and avoiding the situation that the simple clamping seat 701 is deformed and damaged due to excessive force during the tensile test;

[0044] It should be noted that after the forging is clamped and fixed, the two contact sensors 710 are used to contact the forging from the upper and lower ends. The contact sensors 710 can timely feedback the touch signal. When the clamping is unstable during the test and the forging slides between the clamping seats 701, the contact between the contact sensor and the forging is interrupted, and the signal will be timely feedback and prompted to avoid the forging slipping off during the test due to unstable clamping and misjudging the deformation data of the forging.

[0045] Refer to Figure 3 、 Figure 8 and Figure 10 ,The top table 3 and the installation table 5 are bolted together, and two symmetrical sliding holes 15 are provided on the movable table 4. On the lower side of the installation table 5 above the movable table 4, two symmetrical sliding columns 14 are bolted. The two sliding columns 14 are respectively slidably connected inside the two sliding holes 15. A pressure sensor 16 is arranged between the two sliding columns 14. Both ends of the pressure sensor 16 are bolted between the installation table 5 and the movable table 4; On the upper side of the bottom table 1, two symmetrical upper tables 17 are bolted. The two upper tables 17 are respectively located inside the two columns 2. Lifting rods 18 are rotatably connected between the two upper tables 17 and the top table 3 through bearings. Two symmetrical threaded holes are provided on the movable table 4. The two lifting rods 18 are rotationally connected through the inner wall threads inside the two threaded holes of the movable table 4. And the lower ends of the two lifting rods 18 are bolted with rotating shafts 19. Driving gears 20 are bolted on the outer parts of the rotating shafts 19. A cavity is provided inside the bottom table 1. A driving motor 21 is bolted inside the cavity. The output end of the driving motor 21 is connected with a short shaft through a coupling. The other end of the short shaft is bolted with a driving gear 22. The driving gear 22 is meshed with the two driving gears 20 through tooth grooves.

[0046] Specifically, when the movable table 4 is lifted and a tensile test is carried out, the driving motor 21 drives the driving gear 22 to mesh with the driving gear 20. The two lifting rods 18 rotate along with the driving gear 20, and the movable table 4 rises or falls on the two lifting rods 18.

[0047] Working principle: During use, the clamping assembly 7 on the top table 3 is used to fix the forging from the upper end. Subsequently, the position of the movable table 4 is adjusted, and the clamping assembly 7 on the movable table 4 is used to fix the lower end of the forging (fixing process: The forging is placed between the two clamping seats 701. The opening and closing hydraulic cylinder 706 is started to extend and push the opening and closing plate 705 forward. The two clamping seats 701 move along with the opening and closing plate 705. Limited by the limiting seat 702, the two clamping seats 701 approach each other until the clamping heads 703 clamp and fix the forging). When both ends of the forging are fixed, the two anti - detachment hydraulic cylinders 708 are synchronously started to extend, and the two contact sensors 710 approach each other until the two contact sensors 710 contact the upper and lower ends of the forging, and the signals are fed back and received;

[0048] During the movement of the movable table 4, the side attachment frame 801 and the air box 802 move synchronously with it. After the forging is clamped and fixed, wait for the states of the side attachment frame 801 and the air box 802 to stabilize, and then fix the positions of the two side attachment frames 801 (after the states of the side attachment frame 801 and the air box 802 are stable, start the two locking hydraulic cylinders 1305 to extend and push the two turning frames 1302 to turn towards the column 2, so that the snap plates 1304 on the two turning frames 1302 contact and are clamped and fixed with the locking groove 1303 on the column 2). Subsequently, observe whether the liquid levels in the U-shaped liquid pipe 813 are the same (that is, whether the liquid level is at the zero scale line position of the liquid column feedback pipe 814). If the liquid levels are not the same, use the micro air pump 808 to adjust the air pressure in the air box 802 until the liquid levels in the U-shaped liquid pipe 813 are flush. After completion, conduct the tensile test on the forging;

[0049] During the tensile test, when the forging deforms under the action of the tensile force, the side frame 807 will drive the pull rod 806 to press down the inner pressure plate 805. The inner pressure plate 805 moves downward, and the gas in the air box 802 is compressed and enters the mounting head 809 from the exhaust hole 804. Subsequently, it enters the U-shaped liquid pipe 813 through the telescopic pipe 810, the air delivery pipe 811 and the two double-pass connectors 812. The liquid level in the U-shaped liquid pipe 813 changes, and the liquid level in the liquid column feedback pipe 814 rises. The rising value reflects the amount of deformation of the forging.

[0050] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A forging tensile testing device, comprising a base (1), characterized in that: The upper side of the base (1) is fixedly connected to two symmetrical columns (2), the upper ends of the two columns (2) are fixedly connected to the same top platform (3), and a movable platform (4) is arranged between the base (1) and the top platform (3), and mounting platforms (5) are arranged above the movable platform (4) and below the top platform (3), and the two mounting platforms (5) are symmetrically distributed up and down, and square seats (6) are arranged on the two mounting platforms (5), and clamping components (7) are arranged on the two mounting platforms (5), and a deformation variable feedback component (8) is arranged on the side of the movable platform (4). The deformation variable feedback component (8) comprises two side frames (801), an air box (802) and a U-shaped liquid pipe (813), the two side frames (801) are symmetrically distributed on both sides of the air box (802), the two side frames (801) are fixedly connected to the air box (802), and a U-shaped mounting hole is provided inside the base (1), the U-shaped liquid pipe (813) is fixedly connected inside the U-shaped mounting groove, both ends of the U-shaped liquid pipe (813) are higher than the upper outer wall of the base (1), and oil is provided inside the U-shaped liquid pipe (813); The air box (802) is provided with a pull-out hole (803) and an exhaust hole (804), wherein the pull-out hole (803) is located on the upper side of the air box (802), and the exhaust hole (804) is located on the lower side of the air box (802). The air box (802) is provided with a rectangular hole, and a micro air pump (808) is fixedly connected inside the rectangular hole. An inner pressure plate (805) is provided inside the air box (802), and a rubber layer is provided on the outer side of the inner pressure plate (805). A pull-out rod (806) is fixedly connected to the upper side of the inner pressure plate (805), and the upper end of the pull-out rod (806) passes through the pull-out hole (803) of the air box (802) and is fixedly connected to a side frame (807). A groove is provided on the square seat (6) of the mounting platform (5) above the movable platform (4), and the side frame (807) is fixedly connected to the groove of the square seat (6); The base (1) is provided with a circular hole, a telescopic tube (810) is fixedly connected inside the circular hole, a mounting head (809) is fixedly connected to the upper end of the telescopic tube (810), the mounting head (809) is fixedly connected to the exhaust hole (804), a gas supply pipe (811) is fixedly connected to the lower end of the telescopic tube (810), the gas supply pipe (811) is located inside the base (1), and two two-way connectors (812) are fixedly connected to the outer side of a column (2), the two two-way connectors (812) are connected via a conduit, one end of the gas supply pipe (811) is fixedly connected to one two-way connector (812), one end of a U-shaped liquid pipe (813) is fixedly connected to another two-way connector (812), and the other end of the U-shaped liquid pipe (813) is fixedly connected to a liquid column feedback pipe (814); The clamping assembly (7) comprises two clamping seats (701) and two limiting seats (702), the two clamping seats (701) and the two limiting seats (702) are both located inside the mounting platform (5) and are symmetrically distributed, the two limiting seats (702) are both fixedly connected to the mounting platform (5), the two clamping seats (701) are each provided with a sliding groove on opposite sides, the clamping seats (701) and the limiting seats (702) on the same side are both movably connected, and the two clamping seats (701) are each provided with a clamping head (703) on opposite sides, the two clamping seats (701) are each provided with an opening and closing groove (704), the opening and closing grooves (704) on the two clamping seats (701) are symmetrically distributed, and the opening and closing grooves (704) on the two clamping seats (701) are movably connected with the same opening and closing plate (705) inside. The square seat (6) is provided with a concave hole, the concave hole is oriented toward a side close to the clamping seat (701), an opening and closing hydraulic cylinder (706) is fixedly connected to the inside of the concave hole, the telescopic end of the opening and closing hydraulic cylinder (706) is fixedly connected to the opening and closing plate (705), an attachment seat (707) is fixedly connected to the opening and closing plate (705), an anti-slip hydraulic cylinder (708) is fixedly connected to the attachment seat (707), the telescopic end of the anti-slip hydraulic cylinder (708) is located on a side away from the clamping plate (705), the telescopic end of the anti-slip hydraulic cylinder (708) is fixedly connected to a mounting seat (709), and a contact sensor (710) is fixedly connected to the mounting seat (709).

2. A forging tensile testing device according to claim 1, characterized in that: The movable platform (4) is provided with two symmetrical mounting grooves, and the interiors of the two mounting grooves are fixedly connected with bending frames (9), and the two bending frames (9) are respectively located above the two side attachment frames (801). The two bending frames (9) are provided with two symmetrical circular holes, and the upper sides of the two side attachment frames (801) are fixedly connected with two symmetrical sliding rods (10), and the sliding rods (10) are respectively located inside the circular holes of the bending frames (9) and are movably connected. The upper ends of the two sliding rods (10) located on the same side are fixedly connected with the same top block (11), and the outsides of the sliding rods (10) are sleeved with reset springs (12), and the two ends of the reset springs (12) are respectively fixedly connected to the lower side of the top block (11) and the upper side of the bending frames (9).

3. A forging tensile testing device according to claim 2, characterized in that: The two side frames (801) are both provided with locking components (13), and the two locking components (13) are symmetrically distributed.

4. A forging tensile testing device according to claim 3, characterized in that: The locking assembly (13) comprises a shifting slide (1301) and a flip frame (1302), wherein the shifting slide (1301) is located on the side frame (801), and vertical slide grooves are provided on the two columns (2). The two shifting slides (1301) are respectively located in the vertical slide grooves on the two columns (2) and are movably connected, and locking buckle grooves (1303) are provided on opposite sides of the two columns (2), and the locking buckle grooves (1303) are located on the side of the vertical slide grooves, and the flip frame (1302) is connected to the side frame (801). The side attachment frames (801) are movably connected, a snap plate (1304) is fixedly connected to the front end of the flip frame (1302), the snap plate (1304) is snapped with the locking buckle groove (1303), a locking hydraulic cylinder (1305) is fixedly connected to the side of the side attachment frame (801) away from the shift slide (1301), a movable block (1306) is fixedly connected to the telescopic end of the locking hydraulic cylinder (1305), and the movable block (1306) and the flip frame (1302) are movably connected.

5. A forging tensile testing device according to claim 1, characterized in that: The top platform (3) is fixedly connected to the mounting platform (5), and two symmetrical sliding holes (15) are provided on the movable platform (4). Two symmetrical sliding columns (14) are fixedly connected to the lower side of the mounting platform (5) located above the movable platform (4). The two sliding columns (14) are respectively located inside the two sliding holes (15) and are movably connected. A pressure sensor (16) is provided between the two sliding columns (14), and the two ends of the pressure sensor (16) are respectively fixedly connected to the mounting platform (5) and the movable platform (4).

6. A forging tensile testing device according to claim 5, characterized in that: The upper side of the base (1) is fixedly connected to two symmetrical upper platforms (17), the two upper platforms (17) are respectively located inside the two upright columns (2), and lifting rods (18) are movably connected between the two upper platforms (17) and the top platform (3). The movable platform (4) is provided with two symmetrical threaded holes, the two lifting rods (18) are located inside the two threaded holes of the movable platform (4) and are rotatably connected through inner wall threads, and the lower ends of the two lifting rods (18) are fixedly connected to a rotating shaft (19), and the outside of the rotating shaft (19) is fixedly connected to a driving gear (20). A cavity is provided inside the base (1), and a driving motor (21) is fixedly connected inside the cavity. The output end of the driving motor (21) is connected to a short shaft through a coupling, and the other end of the short shaft is fixedly connected to a driving gear (22), and the driving gear (22) and the two driving gears (20) are meshed through tooth grooves.

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