Wheel forge piece forming die, forming machine and using method of wheel forge piece forming die

Abstract

The invention discloses a wheel forge piece forming die, a forming machine and a using method of the wheel forge piece forming die, and belongs to the technical field of forge piece forming. The wheel forge piece forming die comprises an upper die base and further comprises a lower die base, the lower die base is arranged on the lower side of the upper die base, and cavities are formed in the top of the lower die base and the bottom of the upper die base; the two cavities are encircled to form a forming cavity for forming a wheel blank; the ejection mechanism is arranged on the lower die base and used for ejecting the wheel blank formed in the forming cavity. The ejector rod is shielded and covered through the sealing mechanism, deformation caused by inward sinking or protruding of the ejector rod is reduced, the machining precision is improved, meanwhile, pressure borne by the ejector rod during casting is reduced, the service life of the ejector rod is prolonged, and when the ejector rod ejects a wheel blank, mold splitting bases of the forming base are automatically separated, so that the production efficiency is improved. The situation that a forged blank is tightly attached to a mold and is not prone to demolding is avoided, demolding difficulty is reduced, and production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of forging forming, and in particular to a wheel forging forming die and a forming machine and a use method thereof. Background Art

[0002] Wheel forgings are wheel hubs. Wheel hub forging is a processing method that uses forging machinery to apply pressure to metal blanks to cause plastic deformation to obtain wheel hubs with specific mechanical properties, shapes and sizes. When forging, the current forging equipment needs to heat the aluminum alloy and then forge it into shape by applying pressure. In the automated wheel forging process, the blank is clamped by a robot and transferred in each mold one by one, gradually forging the square wheel into a round wheel.

[0003] When the blank is transferred, an ejector device is required to lift it out of the die so that the clamp on the robot arm can hold the blank. The driving structure of the ejector mechanism is usually a crank structure, oil / pneumatic cylinder and other reciprocating motion devices. Generally speaking, when processing the same specification of wheel hubs, the upper and lower poles of the reciprocating motion device are fixed. However, due to adjustment accuracy, temperature changes, wear and other reasons, the upper surface of the ejector rod may not coincide with the bottom surface of the lower die. Under the forging pressure of the upper die, the surface of the blank is sunken or convex, reducing the processing accuracy. At the same time, when the ejector structure is convex, the ejector interval will be subjected to a large forging pressure, reducing the service life; and the formed forging after forging is tightly fitted to the die and is not easy to demold, and has poor practicality. 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 wheel forging forming die and a forming machine and a use method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A wheel forging forming die comprises an upper die seat and further comprises: A lower die base, the lower die base is arranged at the lower side of the upper die base, the top of the lower die base and the bottom of the upper die base are both provided with cavities, and the two cavities are enclosed to form a molding cavity for molding the wheel blank; An ejection mechanism, which is arranged on the lower die base and is used to eject the wheel blank after being formed in the forming cavity; Among them, the lower mold base includes a fixed seat, a movable seat slidably connected in the fixed seat, and a forming seat movably counteracted with the movable seat, the movable seat is provided with a concave hole matched with the ejection mechanism, the movable seat is placed at the concave hole and has a plurality of closed structures evenly arranged in a circle, a first elastic telescopic rod is arranged between the forming seat and the fixed seat, a third elastic telescopic rod is arranged between the movable seat and the fixed seat, the forming seat includes a plurality of split mold seats movably counteracting each other, each of the split mold seats is fixedly connected to the inner wall of the fixed seat by the first elastic telescopic rod, a lower conical surface is arranged at the bottom of the split mold seat, an upper conical surface movably counteracted with the lower conical surface is arranged at the top of the movable seat, and a limiting structure for positioning and supporting the movable seat is arranged on the fixed seat.

[0006] Preferably, the enclosed structure includes a slide groove opened on the movable seat, a baffle slidably connected in the slide groove, and a first elastic element arranged between the inner wall of the slide groove and the baffle, the baffle is movably connected in the recessed hole, and the baffles of two adjacent enclosed structures movably resist each other.

[0007] Preferably, the ejection mechanism comprises a hydraulic cylinder fixed in a fixed seat, a second elastic telescopic rod connected to a plunger rod of the hydraulic cylinder, and a push rod arranged at an end of the second elastic telescopic rod, wherein the push rod movably abuts against the baffle.

[0008] Preferably, the plunger rod of the hydraulic cylinder is connected to a first pull rope, one end of the first pull rope away from the plunger rod passes through a movable seat and is fixedly connected to the baffle, and a guide seat for guiding the first pull rope is arranged in the fixed seat.

[0009] Preferably, the limiting structure includes a groove provided in the fixed seat, a limiting block slidably connected in the groove, and a second elastic element arranged between the limiting block and the inner wall of the groove; the movable seat is provided with a limiting groove matching with the limiting block; the limiting block is provided with a force-bearing inclined surface on the side away from the inner wall of the limiting groove for resisting the movable seat; a push rod is fixed on the baffle plate, and the push rod is movably resisted against the limiting block on the side away from the baffle plate.

[0010] Preferably, the fixed seat is provided with a movable groove for the movable seat to slide up and down, the third elastic telescopic rod is arranged in the movable groove, the bottom wall of the movable groove is fixedly provided with an airbag which is movably opposed to the movable seat, the fixed seat is provided with a pneumatic cavity connected to the airbag through an air pipe, a piston is slidably connected in the pneumatic cavity, a third elastic element is arranged between the piston and the inner wall of the pneumatic cavity, and the end of the piston away from the pneumatic cavity is connected to an insertion rod.

[0011] Preferably, the guide seat comprises two elastic telescopic plates fixed in the fixed seat, a guide rod slidably connected to the first pull rope is arranged between the two elastic telescopic plates, and a socket matching with the insertion rod is provided on the elastic telescopic plates.

[0012] Preferably, a rotating rod is rotatably connected in the fixed seat, a driven gear is fixedly provided on the rotating rod, a rack plate meshing with the driven gear is fixedly provided on the mold splitting seat, a positioning plate that is movably abutted against the molded wheel blank is also fixedly provided on the rotating rod, a second pull rope is fixedly provided on the mold splitting seat, and the end of the second pull rope away from the mold splitting seat passes through the fixed seat and is connected to the movable seat.

[0013] A wheel forging forming machine comprises a wheel forging forming die and a frame, wherein the lower die seat is fixedly arranged at the bottom of the frame, and the top of the frame is provided with a hydraulic device for driving the upper die seat to rise and fall.

[0014] The present invention also discloses a method for using the wheel forging forming machine, comprising the following steps: S1: placing a metal wheel blank in the cavity of the lower die seat, controlling the hydraulic equipment on the frame to work, the hydraulic equipment controls the upper die seat to move downward and fit on the lower die seat, so that the wheel blank placed in the cavity is automatically formed under pressure, and then the hydraulic equipment controls the upper die seat to move upward and reset; S2: Then the hydraulic cylinder is controlled to work, the plunger rod of the hydraulic cylinder moves up and pushes the ejector rod through the second elastic telescopic rod. Since the baffle plate blocks the ejector rod, the second elastic telescopic rod is compressed. During the upward movement of the plunger rod, a pulling force is applied to the first pull rope, and the first pull rope pulls the baffle plate, so that the baffle plate moves toward the inside of the slide groove and gradually moves away from the concave hole. After the concave hole no longer blocks the ejector rod, the ejector rod moves up under the elastic push of the second elastic telescopic rod, and the ejector rod supports the bottom of the formed wheel blank. When the baffle plate moves, the push rod pushes the limit block, and the limit block shrinks into the groove, and the limit block no longer limits the movable seat. S3: As the first pull rope is continuously stressed, after the baffle moves to the end of the slide groove, the first pull rope applies a downward pulling force to the movable seat through the baffle, and the movable seat is forced to move downward in the movable groove. After the movable seat moves downward, the lower conical surface no longer abuts against the upper conical surface, and each mold separation seat of the forming seat is separated from each other under the action of the first elastic telescopic rod and the second pull rope, so that the inner wall of the forming cavity is separated from the formed wheel blank; S4: When the mold splitting seat approaches the inner wall of the fixed seat, the rack plate on the mold splitting seat meshes with the driven gear on the rotating rod, and the driven gear drives the rotating rod and the positioning plate on the rotating rod to rotate, so that the surface of the positioning plate after movement is in the same plane as the inner wall of the cavity when the mold splitting seat is working; S5: As the movable seat moves toward the bottom of the movable groove, the movable seat squeezes the airbag, and the air in the airbag is introduced into the pneumatic cavity through the air pipe. The piston in the pneumatic cavity is displaced by force, and the piston drives the insertion rod away from the insertion hole of the elastic telescopic plate. The elastic telescopic plate is no longer restricted. At this time, the movable seat cannot continue to move downward in the movable groove. When the plunger rod drives the first pull rope to continue to move upward, the elastic telescopic plate is stretched, and the plunger rod drives the push rod to move upward through the second elastic telescopic rod, so that the push rod pushes the wheel blank upward until the wheel blank abuts against the top plate surface of the positioning plate, and then the formed wheel blank is transferred to other subsequent processing steps by a robot.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The wheel forging forming die, forming machine and use method thereof cover the ejector pin through a sealing mechanism, thereby reducing deformation caused by the ejector pin sinking or protruding, improving processing accuracy, and at the same time, reducing the pressure on the ejector pin during casting, thereby increasing its service life; 2. The wheel forging forming die and forming machine and the use method thereof drive the closed structure to move when the ejection mechanism is working, so that the baffle of the closed structure no longer blocks the concave hole, which facilitates the ejector to eject the wheel blank in the forming cavity upward, and the baffle drives the limiting structure to move when it moves, releases the connection restriction between the movable seat and the fixed seat, and moves the movable seat downward, so that each parting seat of the forming seat is automatically separated, so as to avoid the billet after forging being closely attached to the die and not easy to demold, reduce the difficulty of demolding, and improve production efficiency; 3. The wheel forging forming die and forming machine and the use method thereof utilize the meshing transmission of the rack plate and the driven gear on the rotating rod when the parting seat moves, and the driven gear drives the rotating rod and the positioning plate on the rotating rod to rotate, so that the surface of the positioning plate after movement is in the same plane as the inner wall of the cavity when the parting seat is originally working, so that a plurality of positioning plates cooperate to limit the wheel blank moved out of the forming cavity, and the ejection mechanism pushes the wheel blank to abut against the top surface of the positioning plate, so that the position of the wheel blank moved out of the lower die seat is fixed, and the ejection structure is prevented from shaking due to wear after long-term use, resulting in a change in the position of the blank each time it is ejected, so that the position of the manipulator clamping is changed, and the placement accuracy of the manipulator is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the molding machine of the present invention; Figure 2 It is a schematic diagram of the overall structure of the upper die base and the lower die base of the present invention; Figure 3 For the present invention Figure 2 A partial enlarged structural diagram of the middle part; Figure 4 It is a schematic diagram of the cross-sectional structure of the upper die base and the lower die base of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the partially enlarged structure of the middle B part; Figure 6 For the present invention Figure 4 A schematic diagram of the partially enlarged structure of the middle C part; Figure 7 It is a partial cross-sectional structural schematic diagram of the lower die base of the present invention; Figure 8 It is a structural schematic diagram of the mold splitting seat of the present invention; Fig. 9 It is a structural schematic diagram of the movable seat and the split mold seat of the present invention when they are separated; Fig.10 It is a schematic diagram of the structure of the positioning plate of the present invention after being flipped; Fig.11 It is a schematic cross-sectional structure diagram of the fixing seat of the present invention being placed at the pneumatic cavity.

[0017] In the figure: 1, upper die seat; 2, lower die seat; 201, fixed seat; 202, movable seat; 2021, limit groove; 203, forming seat; 3, cavity; 4, wheel blank; 5, concave hole; 6, first elastic telescopic rod; 601, third elastic telescopic rod; 7, slide groove; 701, baffle; 7011, push rod; 702, first elastic element; 8, hydraulic cylinder; 801, plunger rod; 8011, first pull rope; 802, second elastic telescopic rod; 803, top Rod; 9, guide seat; 901, elastic telescopic plate; 9011, jack; 902, guide rod; 10, groove; 1001, limit block; 1002, second elastic element; 11, movable groove; 111, airbag; 12, pneumatic chamber; 121, piston; 122, third elastic element; 123, plug rod; 13, rotating rod; 131, driven gear; 132, rack plate; 133, positioning plate; 14, second pull rope; 15, rack; 151, hydraulic equipment. 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., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 , a wheel forging forming die, comprising an upper die seat 1, and also comprising: A lower die base 2, which is arranged at the lower side of the upper die base 1, and a cavity 3 is arranged at the top of the lower die base 2 and the bottom of the upper die base 1, and the two cavities 3 are surrounded to form a molding cavity for molding a wheel blank 4; An ejection mechanism, which is arranged on the lower die base 2 and is used to eject the wheel blank 4 formed in the forming cavity; Among them, the lower mold base 2 includes a fixed base 201, a movable base 202 slidably connected in the fixed base 201, and a molding base 203 movably counteracting the movable base 202. The movable base 202 is provided with a recessed hole 5 that cooperates with the ejection mechanism. The movable base 202 is placed at the recessed hole 5 and is evenly arranged with a number of closed structures in a circle. A first elastic telescopic rod 6 is arranged between the molding base 203 and the fixed base 201, and a third elastic telescopic rod 601 is arranged between the movable base 202 and the fixed base 201. The molding base 203 includes a number of split mold bases that are movably counteracted, and each split mold base is fixedly connected to the inner wall of the fixed base 201 through the first elastic telescopic rod 6. A lower conical surface is arranged at the bottom of the split mold base, and an upper conical surface movably counteracting the lower conical surface is arranged at the top of the movable base 202. A limiting structure for positioning and supporting the movable base 202 is arranged on the fixed base 201.

[0021] A wheel forging forming machine includes a wheel forging forming die and a frame 15. A lower die seat 2 is fixedly arranged at the bottom of the frame 15. A hydraulic device 151 for driving an upper die seat 1 to rise and fall is arranged at the top of the frame 15.

[0022] Specifically, a metal wheel stock 4 is placed in the cavity 3 of the lower die base 2, and the hydraulic device 151 on the frame 15 is controlled to work. The hydraulic device 151 controls the upper die base 1 to move downward and fit on the lower die base 2, so that the wheel stock 4 placed in the cavity 3 is automatically formed under pressure, and then the hydraulic device 151 controls the upper die base 1 to move upward and reset, and the ejector 803 is covered by the sealing mechanism to reduce the deformation caused by the indentation or protrusion of the ejector 803, thereby improving the processing accuracy. At the same time, the pressure on the ejector 803 during casting is reduced to increase its service life, and then the ejection mechanism is controlled to work to eject. When the mechanism is working, it drives the closed structure to move, so that the closed structure no longer blocks the recessed hole 5, which makes it easier for the ejection mechanism to eject the wheel blank 4 in the forming cavity upward through the recessed hole 5, and when the closed structure moves, it drives the limiting structure to move, releases the connection restriction between the movable seat 202 and the fixed seat 201, and moves the movable seat 202 downward. The upper conical surface of the movable seat 202 no longer abuts against the lower conical surface of the forming seat 203, and the various parting seats of the forming seat 203 are automatically separated under the pull of the first elastic telescopic rod 6, so as to avoid the forged blank being closely attached to the mold and difficult to demold, reduce the difficulty of demolding, and improve production efficiency.

[0023] Example 2: Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Fig. 9 , a wheel forging forming die, based on Example 1, further, the closed structure includes a slide groove 7 opened on the movable seat 202, a baffle 701 slidably connected in the slide groove 7, and a first elastic element 702 arranged between the inner wall of the slide groove 7 and the baffle 701, the baffle 701 is movably connected in the recessed hole 5, and the baffles 701 of two adjacent closed structures are movably offset from each other.

[0024] Furthermore, the ejection mechanism includes a hydraulic cylinder 8 fixed in the fixing seat 201 , a second elastic telescopic rod 802 connected to the plunger rod 801 of the hydraulic cylinder 8 , and a push rod 803 arranged at the end of the second elastic telescopic rod 802 , and the push rod 803 movably abuts against the baffle 701 .

[0025] Furthermore, the plunger rod 801 of the hydraulic cylinder 8 is connected to a first pull rope 8011 , and one end of the first pull rope 8011 away from the plunger rod 801 passes through the movable seat 202 and is fixedly connected to the baffle 701 . A guide seat 9 for guiding the first pull rope 8011 is provided in the fixed seat 201 .

[0026] Specifically, after the lower die base 2 cooperates with the upper die base 1 to forge the wheel blank 4, the hydraulic cylinder 8 is controlled to work, and the plunger rod 801 of the hydraulic cylinder 8 moves upward and pushes the push rod 803 through the second elastic telescopic rod 802. Since the baffle 701 resists the limit of the push rod 803, the second elastic telescopic rod 802 is compressed, and during the upward movement of the plunger rod 801, a pulling force is applied to the first pull rope 8011, and the first pull rope 8011 pulls the baffle 701, and the baffle 701 squeezes the first elastic element 702. The first elastic element 702 is set as a spring, so that the baffle 701 moves toward the inside of the slide groove 7 to gradually move away from the recessed hole 5. After the recessed hole 5 no longer blocks the push rod 803, the push rod 803 moves upward under the elastic push of the second elastic telescopic rod 802, and the push rod 803 supports the bottom of the formed wheel blank 4. As the hydraulic cylinder 8 continues to operate, the push rod 803 pushes the formed wheel blank 4 upward.

[0027] Example 3: Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Fig. 9 , a wheel forging forming die, based on Example 2, further, a limiting structure includes a groove 10 opened in a fixed seat 201, a limiting block 1001 slidably connected in the groove 10, and a second elastic element 1002 arranged between the limiting block 1001 and the inner wall of the groove 10, a limiting groove 2021 matched with the limiting block 1001 is opened on the movable seat 202, a force-bearing inclined surface that resists the movable seat 202 is opened on the side of the limiting block 1001 away from the inner wall of the limiting groove 2021, and a push rod 7011 is fixed on the baffle 701, and the side of the push rod 7011 away from the baffle 701 resists the limit block 1001 movably.

[0028] Specifically, when the wheel blank 4 is forged, the limit block 1001 is inserted into the limit groove 2021 to support and limit the position of the movable seat 202. When the subsequent ejection mechanism drives the closed structure to move, the baffle 701 pushes the limit block 1001 through the push rod 7011 when it moves, and the limit block 1001 shrinks into the groove 10, and the limit block 1001 no longer limits the movable seat 202. The movable seat 202 can move up and down freely. When the movable seat 202 moves up again, the top of the movable seat 202 presses the force-bearing inclined surface of the limit block 1001, and the limit block 1001 automatically avoids the movable seat 202 until the limit groove 2021 is aligned with the limit block 1001. The limit block 1001 is inserted into the limit groove 2021 under the elastic force of the second elastic element 1002 to achieve the limit support of the movable seat 202. The second elastic element 1002 is set as a spring.

[0029] Example 4: Reference Figure 7 and Fig.11A wheel forging forming die, based on Example 3, further, a movable groove 11 for a movable seat 202 to slide up and down is opened on the fixed seat 201, a third elastic telescopic rod 601 is arranged in the movable groove 11, and an air bag 111 that is movably opposed to the movable seat 202 is fixed on the bottom wall of the movable groove 11, a pneumatic cavity 12 connected to the air bag 111 through an air pipe is opened in the fixed seat 201, a piston 121 is slidably connected in the pneumatic cavity 12, a third elastic element 122 is arranged between the piston 121 and the inner wall of the pneumatic cavity 12, and an insertion rod 123 is connected to the end of the piston 121 away from the pneumatic cavity 12.

[0030] Furthermore, the guide seat 9 includes two elastic expansion plates 901 fixed in the fixed seat 201 , a guide rod 902 slidably connected to the first pull rope 8011 is provided between the two elastic expansion plates 901 , and a socket 9011 matching with the insertion rod 123 is provided on the elastic expansion plate 901 .

[0031] Specifically, when the ejection mechanism is working, the plunger rod 801 applies a pulling force to the first pull rope 8011 during the upward movement. As the first pull rope 8011 is continuously stressed, after the baffle plate 701 moves to the end of the slide groove 7, the first pull rope 8011 applies a downward pulling force to the movable seat 202 through the baffle plate 701, and the movable seat 202 is forced to move downward in the movable groove 11. After the movable seat 202 moves downward, the lower conical surface no longer abuts against the upper conical surface, and the respective split mold seats of the molding seat 203 are separated from each other under the action of the first elastic telescopic rod 6, so that the inner wall of the molding cavity is separated from the molded wheel blank 4. It should be noted that as the movable seat 202 moves to the bottom of the movable groove 11, the movable seat 202 squeezes the airbag 111 The air in the airbag 111 is introduced into the pneumatic chamber 12 through the trachea, and the piston 121 in the pneumatic chamber 12 is displaced by force. The piston 121 drives the insertion rod 123 away from the insertion hole 9011 of the elastic telescopic plate 901, and the elastic telescopic plate 901 is no longer restricted. At this time, the movable seat 202 cannot continue to move downward in the movable groove 11. When the plunger rod 801 drives the first pull rope 8011 to continue to move upward, the elastic telescopic plate 901 will be stretched to prevent the first pull rope 8011 from being fixed in distance and unable to continue to move upward with the plunger rod 801, resulting in a limit on the upward push distance of the push rod 803. The plunger rod 801 drives the push rod 803 to move upward through the second elastic telescopic rod 802 until it reaches the predetermined position.

[0032] Example 5: Reference Figure 2 , Figure 3 , Figure 6 , Figure 7 , Fig. 9 and Fig.10, a wheel forging forming mold, based on Example 4, further, a rotating rod 13 is rotatably connected in the fixed seat 201, a driven gear 131 is fixedly provided on the rotating rod 13, a rack plate 132 meshing with the driven gear 131 is fixedly provided on the mold splitting seat, and a positioning plate 133 that is movably opposed to the formed wheel blank 4 is fixedly provided on the rotating rod 13, and a second pull rope 14 is fixedly provided on the mold splitting seat, and the end of the second pull rope 14 away from the mold splitting seat passes through the fixed seat 201 and is connected to the movable seat 202.

[0033] Specifically, when the ejection mechanism is working, the various mold separation seats of the forming seat 203 move away from each other. When the mold separation seat approaches the inner wall of the fixed seat 201, the rack plate 132 on the mold separation seat meshes with the driven gear 131 on the rotating rod 13 for transmission. The driven gear 131 drives the rotating rod 13 and the positioning plate 133 on the rotating rod 13 to rotate, so that the surface of the moving positioning plate 133 and the inner wall of the cavity 3 when the original mold separation seat is in operation are in the same plane, so that the multiple positioning plates 133 cooperate to limit the centering of the wheel blank 4 moved out of the forming cavity, and the ejection mechanism pushes the wheel blank 4 to abut against the top surface of the positioning plate 133, so that the position of the wheel blank 4 moved out of the lower mold seat 2 is fixed, so as to avoid the ejection structure after long-term use. The gap caused by wear increases, which will cause the ejection structure to shake, resulting in the position of the blank changing each time it is ejected. The position of the manipulator clamping is changed, thereby ensuring the placement accuracy of the manipulator; and a second pull rope 14 is set between the mold separation seat and the movable seat 202, so that the movable seat 202 can be rigidly pulled by the second pull rope 14 when it moves downward, thereby preventing the first elastic telescopic rod 6 from becoming weaker due to long-term use, resulting in poor meshing accuracy between the rack plate 132 and the driven gear 131. It should be noted that when in working state, the second pull rope 14 set between the movable seat 202 and the mold separation seat is slightly loose. After the movable seat 202 moves down a certain distance, the second pull rope 14 is tightened and pulls the mold separation seat. This is because the top of the movable seat 202 is provided with model protrusions forging and forming the wheel blank 4. These protrusions will hinder the lateral movement of the mold separation seat. Only after the movable seat 202 moves down a certain distance will it not hinder the lateral movement of the mold separation seat.

[0034] The present invention also discloses a method for using the wheel forging forming machine, comprising the following steps: S1: placing a metal wheel stock 4 in the cavity 3 of the lower die base 2, controlling the hydraulic device 151 on the frame 15 to work, the hydraulic device 151 controls the upper die base 1 to move downward and fit on the lower die base 2, so that the wheel stock 4 placed in the cavity 3 is automatically formed under pressure, and then the hydraulic device 151 controls the upper die base 1 to move upward and reset; S2: Then the hydraulic cylinder 8 is controlled to work, the plunger rod 801 of the hydraulic cylinder 8 moves up and pushes the push rod 803 through the second elastic telescopic rod 802. Since the baffle 701 blocks the push rod 803, the second elastic telescopic rod 802 is compressed. During the upward movement of the plunger rod 801, a pulling force is applied to the first pull rope 8011. The first pull rope 8011 pulls the baffle 701, so that the baffle 701 moves toward the inside of the slide groove 7 and gradually moves away from the concave hole 5. After the concave hole 5 no longer blocks the push rod 803, the push rod 803 moves up under the elastic push of the second elastic telescopic rod 802. The push rod 803 supports the bottom of the formed wheel blank 4, and when the baffle 701 moves, it pushes the limit block 1001 through the push rod 7011. The limit block 1001 shrinks into the groove 10, and the limit block 1001 no longer limits the movable seat 202. S3: As the first pull rope 8011 is continuously stressed, after the baffle plate 701 moves to the end of the slide groove 7, the first pull rope 8011 applies a downward pulling force to the movable seat 202 through the baffle plate 701, and the movable seat 202 is forced to move downward in the movable groove 11. After the movable seat 202 moves downward, the lower conical surface no longer abuts against the upper conical surface, and the respective parting seats of the forming seat 203 are separated from each other under the action of the first elastic telescopic rod 6 and the second pull rope 14, so that the inner wall of the forming cavity is separated from the formed wheel blank 4; S4: When the mold splitting seat approaches the inner wall of the fixed seat 201, the rack plate 132 on the mold splitting seat meshes with the driven gear 131 on the rotating rod 13, and the driven gear 131 drives the rotating rod 13 and the positioning plate 133 on the rotating rod 13 to rotate, so that the surface of the positioning plate 133 after movement is in the same plane as the inner wall of the cavity 3 when the mold splitting seat is working; S5: As the movable seat 202 moves toward the bottom of the movable groove 11, the movable seat 202 squeezes the airbag 111, and the air in the airbag 111 is introduced into the pneumatic cavity 12 through the trachea. The piston 121 in the pneumatic cavity 12 is displaced by force, and the piston 121 drives the insertion rod 123 away from the insertion hole 9011 of the elastic telescopic plate 901. The elastic telescopic plate 901 is no longer restricted. At this time, the movable seat 202 cannot continue to move downward in the movable groove 11. When the plunger rod 801 drives the first pull rope 8011 to continue to move upward, the elastic telescopic plate 901 is stretched, and the plunger rod 801 drives the push rod 803 to move upward through the second elastic telescopic rod 802, so that the push rod 803 pushes the wheel blank 4 upward until the wheel blank 4 abuts against the top plate surface of the positioning plate 133, and then the formed wheel blank 4 is transferred to other subsequent processing steps by a robot.

[0035] 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 wheel forging forming die, comprising an upper die seat (1), characterized in that: Also includes: A lower die base (2), the lower die base (2) being arranged on the lower side of the upper die base (1), the top of the lower die base (2) and the bottom of the upper die base (1) both being provided with cavities (3), the two cavities (3) together enclosing a molding cavity for molding a wheel blank (4); An ejection mechanism, the ejection mechanism being arranged on the lower die base (2) and being used for ejecting the wheel blank (4) after being formed in the forming cavity; The lower mold base (2) comprises a fixed base (201), a movable base (202) slidably connected to the fixed base (201), and a molding base (203) movably abutting against the movable base (202); a concave hole (5) cooperating with the ejection mechanism is provided on the movable base (202); a plurality of sealed structures are evenly arranged on the circumference of the concave hole (5) at the movable base (202); a first elastic telescopic rod (6) is arranged between the molding base (203) and the fixed base (201); A third elastic telescopic rod (601) is arranged between the seat (202) and the fixed seat (201); the molding seat (203) comprises a plurality of split mold seats that are movably opposed to each other; each of the split mold seats is fixedly connected to the inner wall of the fixed seat (201) via a first elastic telescopic rod (6); a lower conical surface is arranged at the bottom of the split mold seat; an upper conical surface that is movably opposed to the lower conical surface is arranged at the top of the movable seat (202); and a limiting structure for positioning and supporting the movable seat (202) is arranged on the fixed seat (201).

2. A wheel forging forming die according to claim 1, characterized in that: The enclosed structure comprises a slide groove (7) provided on the movable seat (202), a baffle (701) slidably connected in the slide groove (7), and a first elastic element (702) arranged between the inner wall of the slide groove (7) and the baffle (701); the baffle (701) is movably connected in the concave hole (5), and two adjacent baffles (701) of the enclosed structure movably abut against each other.

3. A wheel forging forming die according to claim 2, characterized in that: The ejection mechanism comprises a hydraulic cylinder (8) fixed in a fixed seat (201), a second elastic telescopic rod (802) connected to a plunger rod (801) of the hydraulic cylinder (8), and a push rod (803) arranged at the end of the second elastic telescopic rod (802), wherein the push rod (803) movably abuts against the baffle (701).

4. A wheel forging forming die according to claim 3, characterized in that: The plunger rod (801) of the hydraulic cylinder (8) is connected to a first pull rope (8011); one end of the first pull rope (8011) away from the plunger rod (801) passes through the movable seat (202) and is fixedly connected to the baffle (701); a guide seat (9) for guiding the first pull rope (8011) is arranged in the fixed seat (201).

5. A wheel forging forming die according to claim 4, characterized in that: The limiting structure comprises a groove (10) provided in the fixed seat (201), a limiting block (1001) slidably connected in the groove (10), and a second elastic element (1002) arranged between the limiting block (1001) and the inner wall of the groove (10); the movable seat (202) is provided with a limiting groove (2021) matching with the limiting block (1001); a side of the limiting block (1001) away from the inner wall of the limiting groove (2021) is provided with a force-bearing inclined surface that movably resists the movable seat (202); a push rod (7011) is fixedly provided on the baffle plate (701); a side of the push rod (7011) away from the baffle plate (701) movably resists the limiting block (1001).

6. A wheel forging forming die according to claim 5, characterized in that: The fixed seat (201) is provided with a movable groove (11) for the movable seat (202) to slide up and down, the third elastic telescopic rod (601) is arranged in the movable groove (11), the bottom wall of the movable groove (11) is fixedly provided with an air bag (111) that is movable against the movable seat (202), the fixed seat (201) is provided with a pneumatic cavity (12) that is connected to the air bag (111) through an air pipe, the pneumatic cavity (12) is slidably connected with a piston (121), a third elastic element (122) is arranged between the piston (121) and the inner wall of the pneumatic cavity (12), and an insertion rod (123) is connected to the end of the piston (121) away from the pneumatic cavity (12).

7. A wheel forging forming die according to claim 6, characterized in that: The guide seat (9) comprises two elastic telescopic plates (901) fixed in the fixed seat (201), a guide rod (902) slidably connected to the first pull rope (8011) is arranged between the two elastic telescopic plates (901), and a plug hole (9011) matching with the plug rod (123) is provided on the elastic telescopic plates (901).

8. A wheel forging forming die according to claim 7, characterized in that: A rotating rod (13) is rotatably connected inside the fixed seat (201), a driven gear (131) is fixedly provided on the rotating rod (13), a rack plate (132) meshing with the driven gear (131) is fixedly provided on the split mold seat, a positioning plate (133) movably abutting against the molded wheel blank (4) is also fixedly provided on the rotating rod (13), and a second pull rope (14) is fixedly provided on the split mold seat, an end of the second pull rope (14) away from the split mold seat passes through the fixed seat (201) and is connected to the movable seat (202).

9. A wheel forging forming machine, comprising the wheel forging forming die according to claim 8, characterized in that: It also comprises a frame (15), the lower die base (2) being fixedly arranged at the bottom of the frame (15), and a hydraulic device (151) for driving the upper die base (1) to rise and fall is arranged at the top of the frame (15).

10. A method for using the wheel forging forming machine according to claim 9, characterized in that: The following steps are involved: S1: placing a metal wheel blank (4) in the cavity (3) of the lower die seat (2), controlling the hydraulic device (151) on the frame (15) to operate, the hydraulic device (151) controlling the upper die seat (1) to move downward and fit onto the lower die seat (2), so that the wheel blank (4) placed in the cavity (3) is automatically formed under pressure, and then the hydraulic device (151) controls the upper die seat (1) to move upward and reset; S2: The hydraulic cylinder (8) is then controlled to work, the plunger rod (801) of the hydraulic cylinder (8) moves upward and pushes the push rod (803) through the second elastic telescopic rod (802). Since the baffle plate (701) resists and limits the push rod (803), the second elastic telescopic rod (802) is compressed. During the upward movement of the plunger rod (801), a pulling force is applied to the first pull rope (8011). The first pull rope (8011) pulls the baffle plate (701), causing the baffle plate (701) to move into the slide groove (7). The push rod (803) is moved to gradually move away from the concave hole (5). After the concave hole (5) no longer blocks the push rod (803), the push rod (803) moves upward under the elastic push of the second elastic telescopic rod (802). The push rod (803) supports the bottom of the formed wheel blank (4). When the baffle plate (701) moves, the push rod (7011) pushes the limit block (1001), and the limit block (1001) shrinks into the groove (10). The limit block (1001) no longer limits the movable seat (202). S3: As the first pull rope (8011) is continuously subjected to force, after the baffle plate (701) moves to the end of the slide groove (7), the first pull rope (8011) applies a downward pulling force to the movable seat (202) through the baffle plate (701), and the movable seat (202) is forced to move downward in the movable groove (11). After the movable seat (202) moves downward, the lower conical surface no longer abuts against the upper conical surface, and the respective split mold seats of the molding seat (203) are separated from each other under the action of the first elastic telescopic rod (6) and the second pull rope (14), so that the inner wall of the molding cavity is separated from the molded wheel blank (4); S4: When the mold splitting seat approaches the inner wall of the fixed seat (201), the rack plate (132) on the mold splitting seat and the driven gear (131) on the rotating rod (13) are meshed and transmitted, and the driven gear (131) drives the rotating rod (13) and the positioning plate (133) on the rotating rod (13) to rotate, so that the plate surface of the positioning plate (133) after movement is in the same plane as the inner wall of the cavity (3) when the mold splitting seat is working; S5: As the movable seat (202) moves toward the bottom of the movable groove (11), the movable seat (202) squeezes the airbag (111), and the air in the airbag (111) is introduced into the pneumatic chamber (12) through the trachea. The piston (121) in the pneumatic chamber (12) is displaced by the force, and the piston (121) drives the insertion rod (123) away from the insertion hole (9011) of the elastic expansion plate (901). The elastic expansion plate (901) is no longer restricted. At this time, the movable seat (202) can no longer move in the movable groove. The wheel blank (4) continues to move downward in the groove (11), and when the plunger rod (801) drives the first pull rope (8011) to continue to move upward, the elastic telescopic plate (901) is stretched, and the plunger rod (801) drives the push rod (803) to move upward through the second elastic telescopic rod (802), so that the push rod (803) pushes the wheel blank (4) upward until the wheel blank (4) abuts against the top plate surface of the positioning plate (133), and then the formed wheel blank (4) is transferred to other subsequent processing steps by a robot.

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