Hot extrusion forming device and method for large cylindrical forgings

Abstract

The invention discloses a hot extrusion forming device and method for a large cylindrical forge piece, and belongs to the technical field of forge piece forming. A hot extrusion forming device for large cylindrical forgings comprises a rack and further comprises a die holder part, the die holder part comprises a lower die holder and an upper die holder, the lower die holder is fixedly arranged on the rack through a supporting rod, hydraulic equipment used for driving the upper die holder to ascend and descend is arranged on the rack, and the upper die holder is arranged on the upper side of the lower die holder and movably abuts against the lower die holder; the conveying part comprises a first conveyor and a second conveyor, a supporting base is arranged between the first conveyor and the lower die base, and the second conveyor is arranged on the side, away from the first conveyor, of the lower die base; according to the device, automatic feeding of forge piece blanks and automatic discharging of barrel forge pieces subjected to extrusion forming can be conveniently achieved, the automation degree is high, the forge piece extrusion forming efficiency is improved, an ejection mechanism does not need to be used for ejecting the forge piece blanks upwards, the forge piece blanks can be conveniently and rapidly demolded, and the extrusion forming quality of the forge piece blanks is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of forging forming, and in particular to a hot extrusion forming device and method for large-scale cylindrical forgings. Background Art

[0002] Forgings refer to workpieces or blanks obtained by forging and deforming metal billets. The processing and forming of forgings are divided into cold forging, warm forging and hot forging according to the temperature of the billet 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 billet. Large diameter refined steel forgings are large forgings, which need to be stamped by hot forging.

[0003] Existing hot extrusion forming equipment does not have the function of automatic demoulding. Workers need to use tools to manually remove forgings from the mold. The operation is time-consuming and labor-intensive, affecting processing efficiency. The degree of automation is low, and manual loading and unloading is still required, which increases labor intensity. In addition, since the forgings are tightly filled in the mold, it is difficult to demold the forgings. The forgings may still be in a high temperature state or have a certain elasticity. When the forgings are ejected by the ejection mechanism, since the forgings are tightly filled in the mold, a certain part of the bottom of the forging will be deformed due to a large thrust, which reduces the forging processing efficiency and processing quality. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a hot extrusion forming device and method for large cylindrical forgings.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A hot extrusion forming device for large cylindrical forgings, comprising a frame and: A die base part, the die base part includes a lower die base and an upper die base, the lower die base is fixed on the frame through a support rod, a hydraulic device for driving the upper die base to rise and fall is arranged on the frame, and the upper die base is placed on the upper side of the lower die base and movably abuts against the lower die base; A conveying part, the conveying part comprises a first conveyor and a second conveyor, a support seat is arranged between the first conveyor and the lower die seat, and the second conveyor is arranged on a side of the lower die seat away from the first conveyor; A limiting assembly, which is arranged on the support seat and is used to limit the movement of the forging blank on the support seat; A pushing assembly, the pushing assembly being arranged outside the first conveyor and being used for pushing the forging blank on the first conveyor; Wherein, the lower die seat is provided with a positioning component for positioning the forging blank in the lower die seat.

[0006] Preferably, the pushing assembly includes an electric push rod fixed on the first conveyor, a push plate connected to the movable end of the electric push rod, a cross plate fixed to the push plate, a connecting plate arranged on the cross plate, a first elastic telescopic rod arranged on the connecting plate, a first push rod fixedly connected to the first elastic telescopic rod, and a second push rod arranged on the first push rod, and a first force-bearing inclined surface is opened on the side of the first push rod away from the lower mold base.

[0007] Preferably, the limiting assembly includes a first stop block slidably connected in the support seat and a second elastic telescopic rod arranged between the first stop block and the bottom of the support seat, the first stop block is movably opposed to the cross plate, and a second force-bearing inclined surface is provided on the side of the first stop close to the lower mold seat.

[0008] Preferably, the limiting assembly further comprises a second stopper slidably connected in the support seat and a third elastic telescopic rod arranged between the second stopper and the bottom of the support seat, and a pull rope is arranged between the first stopper and the second stopper.

[0009] Preferably, the lower mold base includes a main base body fixedly connected to the frame through a support rod and two sub-base bodies arranged on both sides of the main base body.

[0010] Preferably, the positioning assembly includes a first screw rod rotatably connected to the main seat body, a lower sleeve threadedly connected to the first screw rod, a movable frame fixedly connected to the lower sleeve, and a positioning rod arranged on the movable frame.

[0011] Preferably, a driven gear is fixedly disposed on the first screw rod, and a rack plate meshingly connected with the driven gear is disposed on the push plate.

[0012] Preferably, a slide groove is provided on the main seat body, a slide plate is slidably connected in the slide groove and movably abuts against the positioning rod, an elastic element is provided between the slide plate and the inner wall of the slide groove, and the slide plate and the positioning rod are provided with matching extrusion slopes.

[0013] Preferably, a second screw rod is connected to the top of the first screw rod, an upper sleeve is threadedly connected to the second screw rod, an elastic telescopic plate is fixedly provided on the upper sleeve, the end of the elastic telescopic plate away from the upper sleeve is connected to the sub-seat body, a force block is fixedly provided at the bottom of the sub-seat body, and an inclined groove matching the force block is provided at the top of the main seat body.

[0014] The present invention also discloses a hot extrusion forming method for large cylindrical forgings, which is processed by applying the hot extrusion forming device for large cylindrical forgings, and comprises the following steps: S1: The hydraulic device controls the upper die seat to move downward, and the upper die seat cooperates with the lower die seat to extrude the forging blank placed in the lower die seat, and then controls the upper die seat to move upward and reset; S2: Control the operation of the electric push rod, the movable end of the electric push rod pushes the push plate to move, the push plate drives the first push rod and the second push rod to move toward the lower die seat, the push plate no longer presses the first stopper after moving, the first stopper moves up again and blocks the displacement of the subsequent forging blank, the first conveyor conveys a plurality of cylindrical forging blanks to the support seat, and the conveyed forging blanks are intercepted by the stopper at the push position of the support seat; S3: When the push plate moves, it drives the rack plate to mesh with the driven gear on the first screw rod, the first screw rod drives the second screw rod to rotate, the upper sleeve moves upward along the axial direction of the second screw rod, the lower sleeve moves upward along the axial direction of the first screw rod, and when the upper sleeve drives the sub-seat body to move upward through the elastic expansion plate, the force block no longer abuts against the inner wall of the inclined groove, and the sub-seat body resets and moves back under the tension of the stretched elastic expansion plate, and the two sub-seat bodies on the upper side of the main seat body separate from each other, so that the sub-seat body no longer fits with the extruded cylindrical forging in the lower die seat; S4: As the first push rod and the second push rod continue to move laterally, the second push rod first moves to the upper side of the main seat body and pushes the cylindrical forging on the main seat body, and then the first push rod pushes the forging blank on the support seat onto the main seat body; S5: As the lower sleeve continues to move upward, the moving frame drives the positioning rod to push the slide plate, and the slide plate avoids the upward movement of the positioning rod, so that the positioning rod moves out of the main seat body until the forging blank pushed by the first push rod abuts against the positioning rod. At this time, the second push rod pushes the extruded cylindrical forging onto the second conveyor; S6: Control the electric push rod to drive the push plate to move back. When the first push rod moves back, the first force-bearing inclined surface abuts against the side of the cylindrical forging blank, and the first elastic telescopic rod is stretched. Then the first push rod passes over the first forging blank on the support seat and is placed in front of the second forging blank. When the cross plate moves back, it squeezes the first stopper, and the first stopper moves downward under force. The first stopper no longer limits the first cylindrical forging blank on the support seat, and when the first stopper moves downward, the second stopper is pulled by the pull rope, so that the second stopper moves upward under force to block the second forging blank, thereby preventing the second forging blank from being pushed in the subsequent forging blank transportation of the first conveyor; S7: Repeat steps S1-S6 to achieve continuous extrusion molding of multiple forging blanks.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The hot extrusion forming device and method for large-scale cylindrical forgings facilitates automatic loading of forging blanks and automatic unloading of cylindrical forgings after extrusion forming by cooperating the pushing component with the positioning component, with a high degree of automation and improved extrusion forming efficiency of forgings; 2. The hot extrusion forming device and method for large-scale cylindrical forgings, when the push plate moves, drives the rack plate to mesh with the driven gear on the first screw rod, the first screw rod drives the second screw rod to rotate, the upper sleeve moves upward along the axial direction of the second screw rod, the lower sleeve moves upward along the axial direction of the first screw rod, and when the upper sleeve drives the sub-seat body to move upward through the elastic expansion plate, the force block no longer abuts against the inner wall of the inclined groove, the sub-seat body resets and moves back under the tension of the stretched elastic expansion plate, and the two sub-seat bodies on the upper side of the main seat body are separated from each other, so that the sub-seat body no longer fits with the cylindrical forging extruded in the lower die seat, and there is no need to use the ejection mechanism to eject the forging blank upward, which is convenient for the forging blank to be demolded quickly and ensure the extrusion forming quality of the forging blank; 3. The hot extrusion forming device and method for large cylindrical forgings squeezes the first stopper when the cross plate moves back, and the first stopper moves downward under force. The first stopper no longer limits the first cylindrical forging blank on the support seat, and when the first stopper moves downward, the second stopper is pulled by a pull rope, so that the second stopper moves upward under force to block the second forging blank, preventing the second forging blank and other forging blanks from being pushed during the subsequent forging blank transportation of the first conveyor, thereby ensuring the orderly progress of the continuous extrusion forming of the forging blanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ; Figure 2 For the present invention Figure 1 A partial enlarged structural diagram of the middle part; Figure 3 For the present invention Figure 1 A schematic diagram of the partially enlarged structure of the middle B part; Figure 4 The overall structure of the present invention is shown in FIG. Figure 2 ; Figure 5 For the present invention Figure 4 A schematic diagram of the partially enlarged structure of the middle C part; Figure 6 It is a schematic cross-sectional structure diagram of the mold base portion of the present invention; Figure 7 For the present invention Figure 6 The schematic diagram of the partial enlarged structure of the middle D part; Figure 8 It is a structural schematic diagram of the push component of the present invention; Fig. 9 It is a schematic cross-sectional structure diagram of the first stopper and the second stopper of the present invention; Fig.10 It is a schematic diagram of the external structure of the first screw rod of the present invention; Fig.11 It is a schematic diagram of the structure of the sub-seat body of the present invention when it moves upward.

[0017] In the figure: 1, frame; 101, hydraulic equipment; 2, lower die seat; 201, main seat body; 2011, inclined groove; 202, sub-seat body; 2021, force block; 3, upper die seat; 4, first conveyor; 5, second conveyor; 6, support seat; 7, forging blank; 8, electric push rod; 801, push plate; 802, cross plate; 803, connecting plate; 804, first elastic telescopic rod; 805, first push rod; 806, The second push rod; 9, the first stopper; 901, the second elastic telescopic rod; 10, the second stopper; 1001, the third elastic telescopic rod; 11, the pull rope; 12, the first screw rod; 121, the lower sleeve; 122, the moving frame; 123, the positioning rod; 13, the slide groove; 131, the slide plate; 132, the elastic element; 14, the second screw rod; 141, the upper sleeve; 142, the elastic telescopic plate; 15, the driven gear; 151, the rack plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] Example 1: Reference Figure 1 , Figure 4 , Figure 6 and Fig.11 A hot extrusion forming device for large cylindrical forgings comprises a frame 1 and also comprises: The die base part includes a lower die base 2 and an upper die base 3. The lower die base 2 is fixed on the frame 1 through a support rod. The frame 1 is provided with a hydraulic device 101 for driving the upper die base 3 to rise and fall. The upper die base 3 is placed on the upper side of the lower die base 2 and movably contacts the lower die base 2. The conveying part includes a first conveyor 4 and a second conveyor 5. A support base 6 is provided between the first conveyor 4 and the lower die base 2. The second conveyor 5 is provided on a side of the lower die base 2 away from the first conveyor 4. A limiting assembly, which is arranged on the support seat 6 and is used to limit the movement of the forging blank 7 on the support seat 6; A pushing component, which is arranged outside the first conveyor 4 and is used to push the forging blank 7 on the first conveyor 4; The lower die base 2 is provided with a positioning component for positioning the forging blank 7 in the lower die base 2 .

[0021] Furthermore, the lower die base 2 includes a main base body 201 fixedly connected to the frame 1 through a support rod and two sub-base bodies 202 arranged on both sides of the main base body 201.

[0022] Specifically, the hydraulic equipment 101 controls the upper die seat 3 to move downward, and the upper die seat 3 cooperates with the lower die seat 2 to extrude the forging blank 7 placed in the lower die seat 2, and then controls the upper die seat 3 to move up and reset, and the first conveyor 4 transports multiple cylindrical forging blanks 7 to the support seat 6. The transported forging blanks 7 are intercepted by the block at the pushing position of the support seat 6, and the pushing component is controlled to work so that the pushing component pushes the forging blank 7 on the support seat 6 in the direction of the lower die seat 2. When the pushing component is working, the sub-seat body 202 of the lower die seat 2 moves up and separates from the main seat body 201, which is convenient for the pushing component to push out the tubular forgings extruded in the lower die seat 2 from the side and feed the forging blank 7 on the support seat 6 into it, so as to realize the automatic loading of the forging blank 7 and the automatic unloading of the tubular forgings after extrusion, with a high degree of automation and improved forging extrusion efficiency.

[0023] Example 2: Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 8 , a hot extrusion forming device for large cylindrical forgings, based on Example 1, the pushing assembly includes an electric push rod 8 fixedly mounted on the first conveyor 4, a push plate 801 connected to the movable end of the electric push rod 8, a cross plate 802 fixedly connected to the push plate 801, a connecting plate 803 arranged on the cross plate 802, a first elastic telescopic rod 804 arranged on the connecting plate 803, a first push rod 805 fixedly connected to the first elastic telescopic rod 804, and a second push rod 806 arranged on the first push rod 805, and a first force-bearing inclined surface is opened on the side of the first push rod 805 away from the lower die base 2.

[0024] Specifically, when the pushing assembly is working, the electric push rod 8 is controlled to operate, and the movable end of the electric push rod 8 pushes the push plate 801 to move, and the push plate 801 drives the first push rod 805 and the second push rod 806 to move toward the lower die base 2, and the first push rod 805 pushes the forging blank 7 on the support seat 6, and the second push rod 806 pushes the cylindrical forging pressed and formed on the upper side of the lower die base 2; when the electric push rod 8 drives the push plate 801 to move back, the first force-bearing inclined surface of the first push rod 805 abuts against the side of the cylindrical forging blank 7, and the first elastic telescopic rod 804 is stretched until the first push rod 805 passes over the first forging blank 7 on the support seat 6 and is placed in front of the second forging blank 7. At this time, the push plate 801 of the electric push rod 8 moves back to the initial pushing position.

[0025] Example 3: Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 8 and Fig. 9 , a hot extrusion forming device for large cylindrical forgings. On the basis of Example 2, the limiting assembly includes a first stopper 9 slidably connected to the support seat 6 and a second elastic telescopic rod 901 arranged between the first stopper 9 and the bottom of the support seat 6. The first stopper 9 is movably opposed to the cross plate 802, and a second force-bearing inclined surface is provided on the side of the first stopper 9 close to the lower die seat 2.

[0026] Furthermore, the limiting assembly also includes a second stopper 10 slidably connected to the support seat 6 and a third elastic telescopic rod 1001 arranged between the second stopper 10 and the bottom of the support seat 6, and a pull rope 11 is arranged between the first stopper 9 and the second stopper 10.

[0027] Specifically, the electric push rod 8 is controlled to run, and the movable end of the electric push rod 8 pushes the push plate 801 to move, and the push plate 801 drives the first push rod 805 and the second push rod 806 to move toward the lower die base 2. After the push plate 801 moves, it no longer presses against the first stopper 9, and the first stopper 9 moves up again and blocks the displacement of the subsequent forging blank 7. The first conveyor 4 transports a plurality of cylindrical forging blanks 7 to the support seat 6, and the transported forging blanks 7 are intercepted by the stopper at the pushing position of the support seat 6. After the pushing work is completed, the electric push rod 8 drives the push plate 801 to move back. When the first push rod 805 moves back, the first force-bearing inclined surface abuts against the side of the cylindrical forging blank 7, and the first elastic telescopic rod 804 is stretched. The first push rod 805 passes over the first forging blank 7 on the support seat 6 and is placed in front of the second forging blank 7. When the cross plate 802 moves back, it squeezes the first stopper 9, and the first stopper 9 moves downward under the force. The first stopper 9 no longer limits the first tubular forging blank 7 on the support seat 6, so as to avoid affecting the pushing work of the subsequent pushing component on the first forging blank 7. When the first stopper 9 moves downward, the second stopper 10 is pulled by the pull rope 11, so that the second stopper 10 moves upward under the force to block the second forging blank 7, so as to prevent the second forging blank 7 from being pushed during the subsequent forging blank 7 transportation of the first conveyor 4 due to the first forging blank 7 being unblocked, thereby ensuring the orderly progress of the continuous extrusion molding of the forging blank 7.

[0028] Example 4: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Fig.10 and Fig.11 , a hot extrusion forming device for large cylindrical forgings. On the basis of Example 3, the positioning assembly includes a first screw rod 12 rotatably connected to the main seat body 201, a lower sleeve 121 threadedly connected to the first screw rod 12, a movable frame 122 fixedly connected to the lower sleeve 121, and a positioning rod 123 arranged on the movable frame 122.

[0029] Furthermore, a driven gear 15 is fixedly disposed on the first screw rod 12 , and a rack plate 151 meshingly connected with the driven gear 15 is disposed on the push plate 801 .

[0030] Furthermore, a slide groove 13 is provided on the main seat body 201, and a slide plate 131 is slidably connected in the slide groove 13 and movably resists the positioning rod 123. An elastic element 132 is provided between the slide plate 131 and the inner wall of the slide groove 13, and the elastic element 132 is configured as a spring. The slide plate 131 and the positioning rod 123 are provided with matching extrusion slopes.

[0031] Furthermore, a second screw rod 14 is connected to the top of the first screw rod 12, an upper sleeve 141 is threadedly connected to the second screw rod 14, an elastic telescopic plate 142 is fixedly provided on the upper sleeve 141, and the end of the elastic telescopic plate 142 away from the upper sleeve 141 is connected to the sub-seat body 202, a force block 2021 is fixedly provided at the bottom of the sub-seat body 202, and an inclined groove 2011 matching the force block 2021 is opened on the top of the main seat body 201.

[0032] Specifically, when the push assembly is working, the push plate 801 moves to the lower die seat 2, and when the push plate 801 moves, it drives the rack plate 151 to mesh with the driven gear 15 on the first screw rod 12, and the first screw rod 12 drives the second screw rod 14 to rotate, and the upper sleeve 141 moves upward along the axial direction of the second screw rod 14, and the lower sleeve 121 moves upward along the axial direction of the first screw rod 12. When the upper sleeve 141 drives the sub-seat body 202 to move upward through the elastic expansion plate 142, the force block 2 021 is no longer in contact with the inner wall of the inclined groove 2011, and the sub-seat body 202 is reset and moved back under the pulling force of the stretched elastic expansion plate 142, and the two sub-seat bodies 202 on the upper side of the main seat body 201 are separated from each other, so that the sub-seat body 202 is no longer in contact with the cylindrical forging extruded in the lower die seat 2. As the first push rod 805 and the second push rod 806 continue to move horizontally, the second push rod 806 first moves to the upper side of the main seat body 201 and presses the main seat body 2 01, and then the first push rod 805 pushes the forging blank 7 on the support seat 6 to the main seat body 201. As the lower sleeve 121 continues to move upward, the movable frame 122 drives the positioning rod 123 to push the slide plate 131, and the slide plate 131 avoids the upward movement of the positioning rod 123, so that the positioning rod 123 moves out of the main seat body 201 (it should be noted that the positioning rod 123 is set as an elastic telescopic rod body), until the forging blank 7 pushed by the first push rod 805 abuts against the positioning rod 123. At this time, the second push rod 806 pushes the extruded cylindrical forgings to the second conveyor 5, so as to realize automatic loading of the forging blank 7 and automatic unloading of the cylindrical forgings after extrusion. The degree of automation is high, the extrusion molding efficiency of the forgings is improved, and there is no need to use the ejection mechanism to eject the forging blank 7 upward, so that the forging blank 7 is quickly demolded, and the extrusion molding quality of the forging blank 7 is ensured.

[0033] The present invention also discloses a hot extrusion forming method for large cylindrical forgings, which is processed by applying the hot extrusion forming device for large cylindrical forgings, and comprises the following steps: S1: The hydraulic device 101 controls the upper die seat 3 to move downward, and the upper die seat 3 cooperates with the lower die seat 2 to extrude the forging blank 7 placed in the lower die seat 2, and then controls the upper die seat 3 to move upward and reset; S2: Control the electric push rod 8 to operate, the movable end of the electric push rod 8 pushes the push plate 801 to move, the push plate 801 drives the first push rod 805 and the second push rod 806 to move toward the lower die base 2, the push plate 801 no longer presses the first stopper 9 after moving, the first stopper 9 moves up again and blocks the displacement of the subsequent forging blank 7, the first conveyor 4 conveys a plurality of cylindrical forging blanks 7 to the support seat 6, and the conveyed forging blanks 7 are intercepted by the stopper at the pushing position of the support seat 6; S3: When the push plate 801 moves, it drives the rack plate 151 to mesh with the driven gear 15 on the first screw rod 12, the first screw rod 12 drives the second screw rod 14 to rotate, the upper sleeve 141 moves upward along the axial direction of the second screw rod 14, and the lower sleeve 121 moves upward along the axial direction of the first screw rod 12. When the upper sleeve 141 drives the sub-seat body 202 to move upward through the elastic expansion plate 142, the force block 2021 no longer abuts against the inner wall of the inclined groove 2011, and the sub-seat body 202 is reset and moved back under the pulling force of the stretched elastic expansion plate 142, and the two sub-seat bodies 202 on the upper side of the main seat body 201 are separated from each other, so that the sub-seat body 202 is no longer in contact with the cylindrical forging extruded in the lower die seat 2; S4: As the first push rod 805 and the second push rod 806 continue to move laterally, the second push rod 806 first moves to the upper side of the main seat body 201 and pushes the cylindrical forging on the main seat body 201, and then the first push rod 805 pushes the forging blank 7 on the support seat 6 onto the main seat body 201; S5: As the lower sleeve 121 continues to move upward, the moving frame 122 drives the positioning rod 123 to push the slide plate 131, and the slide plate 131 avoids the upward movement of the positioning rod 123, so that the positioning rod 123 moves out of the main seat body 201, until the forging blank 7 pushed by the first push rod 805 abuts against the positioning rod 123, and at this time, the second push rod 806 pushes the extruded cylindrical forging onto the second conveyor 5; S6: Control the electric push rod 8 to drive the push plate 801 to move back. When the first push rod 805 moves back, the first force-bearing inclined surface abuts against the side of the cylindrical forging blank 7, and the first elastic telescopic rod 804 is stretched. Then the first push rod 805 passes over the first forging blank 7 on the support seat 6 and is placed in front of the second forging blank 7. When the cross plate 802 moves back, it squeezes the first stopper 9, and the first stopper 9 moves downward under force. The first stopper 9 no longer limits the first cylindrical forging blank 7 on the support seat 6, and when the first stopper 9 moves downward, the second stopper 10 is pulled by the pull rope 11, so that the second stopper 10 is forced to move upward and then block the second forging blank 7, preventing the second forging blank 7 from being pushed during the subsequent forging blank 7 transportation of the first conveyor 4; S7: repeating steps S1-S6 to achieve continuous extrusion molding of multiple forging blanks 7.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hot extrusion forming device for large cylindrical forgings, comprising a frame (1), characterized in that: Also includes: A die base portion, the die base portion comprising a lower die base (2) and an upper die base (3), the lower die base (2) being fixed to a frame (1) via a support rod, the frame (1) being provided with a hydraulic device (101) for driving the upper die base (3) to rise and fall, the upper die base (3) being placed on the upper side of the lower die base (2) and movably abutting against the lower die base (2); A conveying section, the conveying section comprising a first conveyor (4) and a second conveyor (5), a support base (6) being arranged between the first conveyor (4) and the lower die base (2), and the second conveyor (5) being arranged on a side of the lower die base (2) away from the first conveyor (4); A limiting assembly, the limiting assembly being arranged on the support seat (6) and used for limiting the movement of the forging blank (7) on the support seat (6); A pushing assembly, the pushing assembly being arranged outside the first conveyor (4) and being used for pushing the forging blank (7) on the first conveyor (4); Wherein, a positioning component for positioning the forging blank (7) within the lower die base (2) is provided on the lower die base (2); The pushing assembly comprises an electric push rod (8) fixedly mounted on the first conveyor (4), a push plate (801) connected to the movable end of the electric push rod (8), a transverse plate (802) fixedly connected to the push plate (801), a connecting plate (803) arranged on the transverse plate (802), a first elastic telescopic rod (804) arranged on the connecting plate (803), a first push rod (805) fixedly connected to the first elastic telescopic rod (804), and a second push rod (806) arranged on the first push rod (805), wherein a first force-bearing inclined surface is provided on a side of the first push rod (805) away from the lower die base (2); The limiting assembly comprises a first stopper (9) slidably connected in the support seat (6) and a second elastic telescopic rod (901) arranged between the first stopper (9) and the bottom of the support seat (6), the first stopper (9) and the cross plate (802) movably abut against each other, and a second force-bearing inclined surface is provided on a side of the first stopper (9) close to the lower die seat (2); The limiting assembly further comprises a second stopper (10) slidably connected to the support seat (6) and a third elastic telescopic rod (1001) arranged between the second stopper (10) and the bottom of the support seat (6), and a pull rope (11) is arranged between the first stopper (9) and the second stopper (10); The lower die base (2) comprises a main base body (201) fixedly connected to the frame (1) via a support rod, and two sub-base bodies (202) arranged on both sides of the main base body (201); The positioning assembly comprises a first screw rod (12) rotatably connected to the main seat body (201), a lower sleeve (121) threadedly connected to the first screw rod (12), a moving frame (122) fixedly connected to the lower sleeve (121), and a positioning rod (123) arranged on the moving frame (122).

2. A hot extrusion forming device for large cylindrical forgings according to claim 1, characterized in that: A driven gear (15) is fixedly provided on the first screw rod (12), and a rack plate (151) meshingly connected to the driven gear (15) is provided on the push plate (801).

3. A hot extrusion forming device for large cylindrical forgings according to claim 2, characterized in that: The main seat body (201) is provided with a slide groove (13), the slide groove (13) is slidably connected with a slide plate (131) that movably contacts the positioning rod (123), an elastic element (132) is provided between the slide plate (131) and the inner wall of the slide groove (13), and the slide plate (131) and the positioning rod (123) are provided with matching extrusion inclined surfaces.

4. A hot extrusion forming device for large cylindrical forgings according to claim 3, characterized in that: The top of the first screw rod (12) is connected to a second screw rod (14), an upper sleeve (141) is threadedly connected to the second screw rod (14), an elastic telescopic plate (142) is fixedly provided on the upper sleeve (141), an end of the elastic telescopic plate (142) away from the upper sleeve (141) is connected to the sub-seat body (202), a force-bearing block (2021) is fixedly provided at the bottom of the sub-seat body (202), and an inclined groove (2011) matching the force-bearing block (2021) is provided at the top of the main seat body (201).

5. A hot extrusion forming method for large cylindrical forgings, which is processed by applying a hot extrusion forming device for large cylindrical forgings according to claim 4, characterized in that: The following steps are involved: S1: The hydraulic device (101) controls the upper die seat (3) to move downward, and the upper die seat (3) cooperates with the lower die seat (2) to extrude the forging blank (7) placed in the lower die seat (2), and then controls the upper die seat (3) to move upward and reset; S2: Controlling the operation of the electric push rod (8), the movable end of the electric push rod (8) pushes the push plate (801) to move, the push plate (801) drives the first push rod (805) and the second push rod (806) to move in the direction of the lower die base (2), the push plate (801) no longer presses against the first stopper (9) after moving, the first stopper (9) moves up again and blocks the displacement of the subsequent forging blank (7), the first conveyor (4) conveys a plurality of cylindrical forging blanks (7) to the support base (6), and the conveyed forging blanks (7) are intercepted by the stopper at the push position of the support base (6); S3: When the push plate (801) moves, it drives the rack plate (151) to mesh with the driven gear (15) on the first screw rod (12), the first screw rod (12) drives the second screw rod (14) to rotate, the upper sleeve (141) moves upward along the axial direction of the second screw rod (14), the lower sleeve (121) moves upward along the axial direction of the first screw rod (12), and when the upper sleeve (141) drives the sub-seat body (202) to move upward through the elastic expansion plate (142), the force block (2021) no longer abuts against the inner wall of the inclined groove (211), the sub-seat body (202) resets and moves back under the tensile force of the stretched elastic expansion plate (142), and the two sub-seat bodies (202) on the upper side of the main seat body (201) separate from each other, so that the sub-seat body (202) no longer fits with the cylindrical forging extruded in the lower die seat (2); S4: As the first push rod (805) and the second push rod (806) continue to move laterally, the second push rod (806) first moves to the upper side of the main seat body (201) and pushes the cylindrical forging on the main seat body (201), and then the first push rod (805) pushes the forging blank (7) on the support seat (6) onto the main seat body (201); S5: As the lower sleeve (121) continues to move upward, the movable frame (122) drives the positioning rod (123) to push the slide plate (131), and the slide plate (131) avoids the upward movement of the positioning rod (123), so that the positioning rod (123) moves out of the main seat body (201) until the forging blank (7) pushed by the first push rod (805) abuts against the positioning rod (123), and at this time, the second push rod (806) pushes the extruded cylindrical forging onto the second conveyor (5); S6: Control the electric push rod (8) to drive the push plate (801) to move back. When the first push rod (805) moves back, the first force-bearing inclined surface abuts against the side of the cylindrical forging blank (7), and the first elastic telescopic rod (804) is stretched. Then, the first push rod (805) passes over the first forging blank (7) on the support seat (6) and is placed in front of the second forging blank (7). When the cross plate (802) moves back, it squeezes the first stopper (9), and the first stopper (9) moves downward under force. The first stopper (9) no longer limits the first cylindrical forging blank (7) on the support seat (6), and when the first stopper (9) moves downward, the second stopper (10) is pulled by the pull rope (11), so that the second stopper (10) is forced to move upward and then block the second forging blank (7), thereby preventing the second forging blank (7) from being pushed during the subsequent forging blank (7) transportation by the first conveyor (4); S7: Repeat steps S1-S6 to achieve continuous extrusion molding of multiple forging blanks (7).

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