Forging ejection mechanism for vehicle driving front axle and demolding method

Abstract

The invention discloses a vehicle driving front axle forging ejection mechanism and a demolding method, and relates to the technical field of forge piece manufacturing, the vehicle driving front axle forging ejection mechanism comprises a jacking piece, the jacking piece is arranged in a mold cavity of a lower mold base, and the jacking piece comprises an ejection rod and a control mechanism for controlling the ejection rod to ascend; the top face of the ejector rod and the bottom wall of the lower die base die cavity form a complete die cavity forming face, the ejector rod is configured to conduct jacking through upward movement of the upper die base, and a speed reduction mechanism is arranged below the ejector rod. The problems that in vehicle front axle forging and pressing work in the prior art, the jacking stroke is inconvenient to control due to the fact that a spring is used for jacking, and an ejector rod is higher than the forming face of a die cavity, so that imprint exists at the bottom of a forged piece are solved. The ejector rod is driven to eject through movement of the upper die base, the upper die base and the ejector rod are detachably connected through the self-separation connecting piece, the top face of the ejector rod is flush with the forming face of the die cavity in the normal state, and the situation that the top face of the ejector rod is higher than the forming face of the bottom of the die cavity and consequently forge piece coining is caused is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of forging manufacturing, and in particular to a forging ejection mechanism and a demoulding method for a vehicle driving front axle. Background Art

[0002] The front axle of a car is a device that transmits the directional forces between the frame and the front wheels and the bending moment and torque generated by them. As a key load-bearing and transmission component of the vehicle, some of its core components are usually manufactured using a forging process to ensure high strength, fatigue resistance and reliability.

[0003] In the prior art, when a front axle assembly of an automobile is manufactured by a forging process, a lifting mechanism is generally provided inside the die cavity for the convenience of demolding, and then after the forging is completed, the product inside the die cavity can be ejected by the lifting mechanism. In the prior art, a hydraulic cylinder is generally used to provide power to the lifting rod. When dealing with the lifting of some small components, it is necessary to equip the hydraulic pump and other components to lift the small components by the hydraulic cylinder, which makes the cost too high and causes waste of production capacity. Therefore, in dealing with the forging of some small components, such as the connection part between the steering knuckle and the bearing seat, the elastic force of the spring is used to lift the small components during forging. However, the lifting stroke is inconvenient to control when the spring is used to lift the small components. The top of the push rod must be above the bottom wall of the inner cavity. The top of the push rod is located above the bottom wall of the die cavity, which will cause the blank to be pushed up by the push rod when the blank is placed. In the subsequent upper and lower mold forging, the push rod will be located below the blank, and the bottom surface of the product will have an imprint due to the top force of the spring.

[0004] In view of the above technical problems, the present invention discloses an ejection mechanism and demolding method for a forged front drive axle of a vehicle. The present invention has the advantages of driving the ejector rod to eject by moving the upper die seat, and making the upper die seat and the ejector rod detachably connected by a self-separating connecting piece, so that the top surface of the ejector rod is aligned with the molding surface of the die cavity under normal conditions, thereby preventing the top surface of the ejector rod from being higher than the bottom molding surface of the die cavity and causing forging imprinting. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide an ejection mechanism and a demolding method for a forged front drive axle of a vehicle, so as to solve the technical problems in the prior art that, when forging some small parts in the forging work of the front axle of a vehicle, the ejection stroke is inconvenient to control by means of a spring, and the ejector rod is higher than the molding surface of the die cavity, which easily causes imprinting on the bottom of the forging. The present invention has the advantages that the movement of the upper die seat drives the ejector rod to eject, and the upper die seat and the ejector rod are detachably connected through a self-separating connecting piece, so that the top surface of the ejector rod is aligned with the molding surface of the die cavity under normal conditions, thereby avoiding the top surface of the ejector rod being higher than the molding surface of the bottom of the die cavity to cause imprinting on the forging, etc.

[0006] The present invention is realized by the following technical scheme: The present invention discloses a forging ejection mechanism for a front drive axle of a vehicle, comprising an ejection member, which is arranged inside a die cavity of a lower die seat and is used for ejecting and demolding a forged piece, and the ejection member comprises an ejector rod and a control mechanism for controlling the ejector rod to rise, a through hole is longitudinally opened inside the lower die seat, the ejector rod is slidably inserted inside the through hole, and the top surface of the ejector rod and the bottom wall of the die cavity of the lower die seat form a complete die cavity molding surface; The ejector rod is configured to be lifted by the upward movement of the upper die seat, and the control mechanism includes a connecting rod 1, a self-separating connecting piece and a connecting rod 2. The outer wall of the ejector rod is fixedly provided with the connecting rod 1, and the other end of the connecting rod 1 extends to the outside of the lower die seat through a key groove. The lower part of the upper die seat is fixedly provided with the connecting rod 2, and the bottom end of the connecting rod 2 is detachably connected to the end of the connecting rod 1 located outside the lower die seat through the self-separating connecting piece. A deceleration mechanism is arranged below the top rod, and the deceleration mechanism is used to decelerate the downward movement of the top rod.

[0007] Furthermore, the self-separating connecting part includes a longitudinal block, a fixed block, a transverse block, a connecting block, a separation control rod, a guide groove, a clamping block 1 and a clamping block 2. The longitudinal block is fixedly arranged at one end of the connecting rod 1 located outside the lower mold base, a fixed block is fixedly arranged on one side of the longitudinal block, and a sliding rod is slidably inserted inside the fixed block, a transverse block is fixedly arranged at the rear end of the sliding rod, and a connecting block is fixedly arranged at the front end of the sliding rod, a separation control rod is fixedly arranged on one side of the connecting block, a guide groove is provided on a side of the lower mold base facing the separation control rod, one end of the separation control rod is inserted into the inside of the guide groove, the clamping block 1 is fixedly arranged at the rear end of the transverse block and its rear end surface is arranged as an inclined surface, and the clamping block 2 is fixedly arranged at the bottom of the connecting rod 2.

[0008] Furthermore, the top groove wall of the guide groove is arranged to be inclined, and one end of the separation control rod is in contact with the rear end groove wall of the guide groove, and a spring is also arranged between the transverse block and the fixed block for supporting the transverse block and the fixed block, and the length of the second clamping block along the front-to-back direction is greater than the length of the second connecting rod along the front-to-back direction, and the connection point between the second connecting rod and the second clamping block is at the rear end of the upper end surface of the second clamping block, and the side of the second clamping block facing the first clamping block is also arranged to be an inclined surface.

[0009] Furthermore, the deceleration mechanism includes a piston cylinder and a piston member. The piston cylinder is arranged inside the through hole and is filled with liquid. A piston member is slidably arranged inside the piston cylinder. The bottom end of the push rod extends through the top wall of the piston cylinder to the inside of the piston cylinder and is connected to the piston member. The connection between the push rod and the top wall of the piston cylinder is arranged as a sliding seal. A flow groove for passing liquid is longitudinally opened inside the piston member.

[0010] Furthermore, the piston assembly includes a piston ring, a sealing plate and an adjusting plate. The outer circumferential outer wall of the piston ring is slidably sealed with the inner wall of the piston cylinder. A sealing plate is fixedly arranged on the top of the piston ring. The bottom end of the push rod is fixedly connected to the sealing plate and is concentrically arranged. A circulation groove is opened on the sealing plate from top to bottom. An adjusting plate is arranged above the sealing plate, and the adjusting plate is rotatably sleeved on the outside of the push rod. The adjusting plate and the sealing plate fit each other. An adjusting groove is opened longitudinally on the adjusting plate. Both the adjusting groove and the circulation groove are arranged in a fan shape and a plurality of them are arranged respectively. Both the adjusting groove and the circulation groove are arranged in a ring array.

[0011] Furthermore, a guide rod is fixedly provided on the outer circumferential outer wall of the adjustment plate, a guide slot is opened on the inner wall of the piston cylinder, the guide rod is movably inserted in the inside of the guide slot, the guide slot includes an expansion adjustment section, a reduction adjustment section and a connecting section, the expansion adjustment section is arranged to extend in a straight line upward from the bottom of the inner wall of the piston cylinder, the reduction adjustment section is arranged to extend in a straight line downward from the top of the inner wall of the piston cylinder, and the reduction adjustment section is located above the expansion adjustment section, and the reduction adjustment section and the expansion adjustment section are connected by the connecting section, and the reduction adjustment section and the expansion adjustment section are staggered on the circumferential line of the piston cylinder.

[0012] Furthermore, when the guide rod is located inside the enlarged adjustment section, the flow slot is aligned with the adjustment slot up and down, and when the guide rod is located inside the reduced adjustment section, part of the flow slot space is covered by the upper adjustment plate.

[0013] A demoulding method for a forged ejection mechanism of a vehicle driving front axle comprises the following steps: Step 1: Place the forging blank in the die cavity of the lower die seat, and operate the machine tool to move the upper die seat downward for forging; Step 2: Connecting rod 2 moves down synchronously with the upper die seat and drives clamping block 2 to move down. Clamping block 2 moves down until it contacts clamping block 1 and pushes clamping block 1 forward. As clamping block 2 continues to move down, it moves to the bottom of clamping block 1. At this time, clamping block 1 will move to the top of clamping block 2 through the rebound of the spring. Then the upper die seat continues to move down until the die is closed for forging. After the forging is completed, the machine tool moves the upper die seat up and resets. The third step is to move the upper die seat upward, so that the upper die seat drives the connecting rod 1 upward through the connection between the clamping block 1 and the clamping block 2, thereby making the ejector rod move upward to eject the forging inside the die cavity. When the ejector rod moves upward, it drives the piston member upward, and the guide rod moves from the expanding adjustment section to the reducing adjustment section. At this time, the adjusting groove and the flow groove are aligned up and down, so that the water flow rate increases. When the upper die seat continues to move upward, the separation control rod moves synchronously to the upper bevel of the guide groove, and the forging is ejected. At this time, the guide rod moves to the inside of the reducing adjustment section, so that the water flow rate decreases. As the upper die seat continues to move upward, the separation control rod moves forward through the guidance of the bevel, thereby separating the clamping block 1 from the clamping block 2, and the ejector rod stops moving upward. The ejector rod will move downward by the gravity and deadweight of the forging. At this time, the guide rod is located in the reducing adjustment section, so that the water flow rate decreases, so that the piston member moves downward slowly, and the ejector rod descends synchronously to remove the forging. Step 4: After the forging is removed, the piston will continue to move downward and allow the guide rod to enter the expanded adjustment section, accelerating the descending speed of the piston so that after the forging is removed, the push rod descends and resets.

[0014] The present invention has the following advantages: (1) The present invention provides a push rod, a connecting rod 1, a connecting rod 2 and a self-separating connecting piece, so that when the forging is lifted, there is no need to provide a lifting force through a spring. The push rods in the upper die seat and the lower die seat are detachably connected through the self-separating connecting piece, so that when the upper die seat moves down to complete the mold closing, the connecting rod 2 on the upper die seat is connected to the connecting rod 1 on both sides of the push rod through the self-separating connecting piece, so that when the upper die seat moves up after completing the forging, it can drive the push rod to move up, thereby ejecting the forging. After the push rod has ejected the forging, the self-separating connecting piece automatically disconnects the connection between the connecting rod 1 and the connecting rod 2 to avoid affecting the reset of the upper die seat. Therefore, the top surface of the push rod can be on the same mold cavity molding surface as the bottom wall of the mold cavity under normal conditions, avoiding the push rod being higher than the bottom wall of the mold cavity, which causes the forging to have an imprint that affects the quality of the forging.

[0015] (2) The present invention provides a deceleration mechanism so that after the ejector pushes out the forging and the connection between the connecting rod 1 and the connecting rod 2 is disconnected, the ejector can descend slowly, thereby preventing the ejector from descending quickly and causing the staff to be unable to take out the forging in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the lower die base of the present invention; Figure 3 It is a schematic diagram of the lower die base and keyway structure of the present invention; Figure 4 For the present invention Figure 1A local enlarged structural schematic diagram; Figure 5 It is a schematic cross-sectional structural diagram of the lower die base of the present invention; Figure 6 It is a schematic diagram of the internal through hole structure of the lower die base of the present invention; Figure 7 For the present invention Figure 2 A schematic diagram of the local enlarged structure at B; Figure 8 It is a schematic diagram of the internal structure of the piston cylinder of the present invention; Fig. 9 It is a schematic diagram of the structure of the piston member of the present invention in an exploded state; Fig.10 It is a schematic diagram of the cross-sectional structure of the piston cylinder of the present invention.

[0017] In the figure: 1, lifting member; 2, forging die; 3, through hole; 4, keyway; 5, slide bar; 6, spring; 7, guide slot; 8, deceleration mechanism; 9, flow slot; 10, adjustment slot; 11, guide rod; 201, upper die seat; 202, lower die seat; 203, die cavity; 101, ejector rod; 102, control mechanism; 121, connecting rod 1; 122, self-separating connecting member; 123, connecting rod 2; 221, longitudinal displacement block ; 222, fixed block; 223, transverse block; 224, connecting block; 225, release control rod; 226, guide groove; 227, clamping block one; 228, clamping block two; 801, piston cylinder; 802, piston member; 821, piston ring; 822, sealing plate; 823, adjusting plate; 301, small diameter section; 302, large diameter section; 701, enlarged adjusting section; 702, reduced adjusting section; 703, connecting section. DETAILED DESCRIPTION

[0018] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given. However, the protection scope of the present invention is not limited to the following embodiments. In the description of the present invention, words indicating directions or positional relationships such as "front", "rear", "left", and "right" 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0019] The embodiment discloses a forging ejection mechanism for a front drive axle of a vehicle, such as Figure 1-Figure 10 As shown, it includes a lifting member 1, and the lifting member 1 is arranged at the inner cavity of the lower die of the forging die 2. Through the arrangement of the lifting member 1, after each forging is completed, the lifting member 1 can push out the forging in the inner cavity of the lower die; like Figure 1-Figure 3As shown, the forging die 2 includes an upper die base 201, a lower die base 202 and a die cavity 203. The upper die base 201 and the lower die base 202 are molded together and the blank is forged into the required forging through the die cavity 203, and the lifting member 1 is arranged inside the die cavity 203 of the lower die base 202. After each forging is completed, when the upper die base 201 moves up and returns, the forging inside the die cavity 203 of the lower die base 202 is ejected by the lifting member 1, so as to facilitate the demolding of the forging.

[0020] like Figure 1-Figure 6 As shown, the lifting member 1 specifically includes a push rod 101 and a control mechanism 102 for controlling the push rod 101 to rise. A through hole 3 is longitudinally opened inside the lower mold base 202, and the through hole 3 penetrates the bottom wall of the mold cavity 203 of the lower mold base 202, and the push rod 101 is slidably inserted in the through hole 3, so that the push rod 101 can move up and down. In addition, it should be noted that the outer circumferential outer wall of the push rod 101 is in contact with and slidably cooperates with the inner wall of the through hole 3, and the push rod 101 is In other words, the top surface of the push rod 101 and the bottom wall of the die cavity 203 of the lower die base 202 form a complete die cavity molding surface, and the edge of the top surface of the push rod 101 smoothly transitions with the bottom wall of the die cavity 203 of the lower die base 202, avoiding the top surface of the push rod 101 being higher or lower than the bottom wall of the die cavity 203 of the lower die base 202, thereby avoiding the formation of indentations on the bottom surface of the forging during forging and affecting the product quality.

[0021] Considering that the push rod 101 is driven by the spring 6, the top surface of the push rod 101 must be higher than the bottom wall of the die cavity 203, so that when the die is closed forging, the spring 6 is compressed and the push rod 101 will have an upward force, which can easily cause an indentation on the bottom surface of the forging.

[0022] Furthermore, in this embodiment, the lifting member 1 is configured to be driven by the upward movement of the upper die base 201, so that the ejector pin 101 rises. Therefore, under normal conditions, the top surface of the ejector pin 101 can be kept on the same plane as the bottom wall of the die cavity 203 of the lower die base 202, so as to prevent the ejector pin 101 from being higher than the bottom wall of the die cavity 203. Specifically, Figure 1-Figure 5 As shown, the control mechanism 102 includes a connecting rod 121, a self-separating connecting piece 122 and a connecting rod 2 123. Specifically, the connecting rod 121 is fixedly provided on both sides of a section of the top rod 101 located inside the through hole 3, and the other end of the connecting rod 121 extends to both sides of the outside of the lower mold base 202, and the connecting rod 2 123 is fixedly provided below the two sides of the upper mold base 201, and the bottom end of the connecting rod 2 123 is detachably connected to the end of the connecting rod 121 located outside the lower mold base 202 through the self-separating connecting piece 122.

[0023] More specifically, when the upper die base 201 and the lower die base 202 are closed, the connecting rod 1 121 and the connecting rod 2 123 are connected by the self-separating connecting piece 122, and when the upper die base 201 moves upward, the connecting rod 2 123 drives the connecting rod 1 121 upward through the self-separating connecting piece 122, and the separation of the self-separating connecting piece 122 is controlled by the distance between the upper die base 201 and the lower die base 202. In other words, when the upper die base 201 is moved up and reset by the forging machine, when the upper die base 201 moves up to a certain height, the self-separating connecting piece 122 separates the connecting rod 2 123 and the connecting rod 1 121, and then the connecting rod 1 121 loses its upward force, and the push rod 101 falls under its own weight.

[0024] Through the above arrangement, each time forging is performed, the upper die seat 201 moves downward, and the second connecting rod 123 moves toward the first connecting rod 121. When the upper die seat 201 and the lower die seat 202 are forged, the first connecting rod 121 and the second connecting rod 123 are connected through the self-separating connecting piece 122. After the forging is completed, when the upper die seat 201 moves upward and resets, the upper die seat 201 moves upward to drive the second connecting rod 123 upward, and the second connecting rod 123 drives the first connecting rod 121 upward through the self-separating connecting piece 122, so that the ejector rod 101 inside the through hole 3 moves upward, and then the ejector rod 101 ejects the forging inside the die cavity 203 of the lower die seat 202. It should be noted that when the upper mold base 201 moves downward, before the upper mold base 201 and the lower mold base 202 are closed, the second connecting rod 123 can be connected to the first connecting rod 121 through the self-separating connecting piece 122.

[0025] Key References Figure 6 Key slots 4 are respectively provided on both sides of the lower die base 202, and the key slots 4 are in a long strip shape and arranged longitudinally, and the key slots 4 are connected with the through holes 3, and the key slots 4 also penetrate the end surfaces of both sides of the lower die base 202, and one end of the connecting rod 121 on both sides of the push rod 101 passes through the key slot 4 and extends to the outside of the lower die base 202, and the connecting rod 121 and the key slot 4 are movably plug-in matched, and the connecting rod 121 has a longitudinal movable space inside the key slot 4.

[0026] like Figure 1 , Figure 2 , Figure 4 and Figure 7As shown, the self-separating connecting member 122 includes a longitudinal block 221, a fixed block 222, a transverse block 223, a connecting block 224, a separation control rod 225, a guide groove 226, a clamping block 1 227 and a clamping block 228, wherein the longitudinal block 221 is fixedly arranged at one end of the connecting rod 121 located outside the lower die base 202, and the longitudinal block 221 can move vertically up and down along with the connecting rod 121, and a fixed block 222 is fixedly arranged on one side of the longitudinal block 221, and a transverse block 223 is arranged at the rear end of the fixed block 222, and the transverse block 223 is slidably arranged on one side of the longitudinal block 221, and at the front end surface of the transverse block 223 A slide bar 5 is fixedly provided, and the other end of the slide bar 5 slides through the fixed block 222 and extends to the front end of the fixed block 222. A connecting block 224 is fixedly provided at one end of the slide bar 5 located at the front end of the fixed block 222, and a separation control rod 225 is fixedly provided on the side of the connecting block 224 facing the lower die base 202. In addition, a guide groove 226 is provided on the side of the lower die base 202 facing the separation control rod 225, and one end of the separation control rod 225 is inserted into the inside of the guide groove 226, and one end of the separation control rod 225 contacts the rear end groove wall of the guide groove 226. A spring 6 is also provided between the transverse block 223 and the fixed block 222. , and the spring 6 is sleeved on the outer wall of the slide bar 5 for supporting between the transverse block 223 and the fixed block 222, and the clamping block 1 227 is fixedly arranged at the rear end of the transverse block 223, and the rear end surface of the clamping block 1 227 is set as an inclined surface, and accordingly, a clamping block 228 is fixedly arranged at the bottom of the connecting rod 2 123, and the length of the clamping block 228 along the front-to-back direction is greater than the length of the connecting rod 2 123 along the front-to-back direction, and the connection point between the connecting rod 2 123 and the clamping block 228 is at the rear end of the upper end surface of the clamping block 228, so that the connecting rod 2 123 and the clamping block 228 are specifically L-shaped, and the clamping block 228 The side facing the direction of the clamping block 227 is also set as an inclined surface, and the specific configuration is that when the clamping block 228 moves downward, the clamping block 228 contacts the inclined surface of the clamping block 227 through the inclined surface and moves the clamping block 227 toward the front end, so that the clamping block 228 can be moved to the bottom of the clamping block 227, and then through the action of the spring 6, the clamping block 227 rebounds and moves to the top of the clamping block 228 to limit the clamping block 228, so that the clamping block 228 will drive the clamping block 227 to move upward when it moves upward, thereby driving the connecting rod 121 to move upward, so that the top rod 101 moves upward.

[0027] Please refer to Figure 4The guide groove 226 is specifically configured as a quadrilateral and is concavely opened toward the side wall of the lower mold base 202, and the top wall of the guide groove 226 is configured as a hypotenuse, and the hypotenuse of the top wall of the guide groove 226 is configured so that the vertex of the front groove wall is higher than the vertex of the rear groove wall, so that when the separation control rod 225 moves up along the rear groove wall of the guide groove 226 and moves to the top of the guide groove 226, the separation control rod 225 can be guided toward the front end direction by the guidance of the hypotenuse of the top of the guide groove 226, so that when the connecting rod 1 121 moves up under the drive of the connecting rod 2 123, the separation control rod 225 will also move up synchronously. When the separation control rod 225 moves up, it will contact the hypotenuse of the guide groove 226, so that the separation control rod 225 is moved toward the front end direction, and then the clamping block 228 is driven to move, so that the clamping block 228 is separated from the clamping block 1 227, so that the connection between the connecting rod 1 121 and the connecting rod 2 123 is separated.

[0028] Through the above arrangement, in actual work, when the upper mold base 201 moves downward, the upper mold base 201 first moves downward to drive the connecting rod 2 123 to move downward, and the connecting rod 2 123 moves downward to drive the clamping block 228 to move downward. It should be noted that the front end edge of the bottom of the clamping block 228 is on the inclined surface of the clamping block 228 in the longitudinal direction, so that the clamping block 228 can move forward through the inclined surface to move the clamping block 1 227 forward. Therefore, after the upper mold base 201 moves downward to drive the clamping block 228 to move downward, after the clamping block 228 contacts the inclined surface of the clamping block 1 227, the clamping block 228 will push the clamping block 1 227 in the front end direction during the downward movement through the guidance of the inclined surface, and then as the clamping block 228 continues to move downward, it will move to the bottom of the clamping block 1 227. At this time, when there is no clamping block 228, Under the limit of the connecting block 228, the clamping block 1 227 will move to the top of the clamping block 228 through the rebound of the spring 6, and then the upper die base 201 continues to move down until the mold is closed. After the forging is completed, the upper die base 201 moves up. The upper die base 201 moves up through the connection between the clamping block 1 227 and the clamping block 228, so that the upper die base 201 drives the connecting rod 121 to move up, and then the push rod 101 moves up to eject the forging inside the die cavity 203. When the upper die base 201 continues to move up, the separation control rod 225 moves up to the upper bevel of the guide groove 226 at the same time, and the separation control rod 225 moves forward through the guidance of the bevel, so that the clamping block 1 227 is separated from the clamping block 228, so that after the forging is ejected, the push rod 101 stops moving up, and the forging is removed at this time.

[0029] After the ejector pin 101 ejects the forging and the clamping block 1 27 is separated from the clamping block 2 28, the ejector pin 101 will drop rapidly due to the gravity of the forging and the ejector pin 101, which makes it difficult for the operator to take out the forging. As a result, the forging will quickly move down and return to the die cavity 203 after being ejected, making it inconvenient to operate. Therefore, it is necessary to reduce the descending speed of the ejector pin 101 after the forging is ejected so that the operator can have time to take out the forging before the ejector pin 101 drops and resets.

[0030] In this embodiment, if Figure 5 As shown, a deceleration mechanism 8 is provided below the ejector rod 101 to decelerate the downward movement of the ejector rod 101, thereby preventing the ejector rod 101 from rapidly descending after ejecting the forging, causing the operator to have no time to take out the forging.

[0031] Specifically, Figure 5 , Figure 6 and Figure 8 As shown, the deceleration mechanism 8 includes a piston cylinder 801 and a piston member 802, wherein the piston cylinder 801 is arranged inside the through hole 3, more specifically, the through hole 3 includes a small diameter section 301 and a large diameter section 302, wherein the small diameter section 301 is used to limit the push rod 101, the push rod 101 is slidably inserted inside the small diameter section 301, and the large diameter section 302 is arranged below the small diameter section 301, and the piston cylinder 801 is arranged inside the large diameter section 302, and the piston cylinder 801 is slidably provided with the piston member 802 inside, and the outer circumferential outer wall of the piston member 802 is slidably sealed with the inner wall of the piston cylinder 801, the bottom end of the push rod 101 slides through the top wall of the piston cylinder 801 and extends to the inside of the piston cylinder 801, and the connection between the push rod 101 and the top wall of the piston cylinder 801 is set to be slidingly sealed. The piston cylinder 801 is sealed, and one end of the push rod 101 is fixedly connected to the piston member 802, so that the up and down movement of the push rod 101 will drive the piston member 802 to move up and down in the piston cylinder 801. In addition, a flow groove 9 is longitudinally opened in the piston member 802, and a liquid is provided in the piston cylinder 801, so that when the piston member 802 moves in the piston cylinder 801, the liquid flows through the flow groove 9. By setting the size of the flow groove 9, when the piston member 802 moves up and down in the piston cylinder 801, the moving speed of the piston member 802 can be adjusted, and then the moving speed of the push rod 101 can be adjusted, so as to achieve the purpose of reducing the descending speed of the push rod 101 after the push rod 101 is separated from the separation connecting piece 122 after ejecting the forging.

[0032] Furthermore, in this embodiment, if Figure 8 and Fig. 9As shown, the piston member 802 is specifically configured to include a piston ring 821, a sealing plate 822 and an adjusting plate 823, wherein the outer circumferential outer wall of the piston ring 821 is slidably sealed with the inner wall of the piston cylinder 801, and a sealing plate 822 is fixedly arranged on the top of the piston ring 821, and the sealing plate 822 covers the top opening of the piston ring 821, and the bottom end of the push rod 101 is fixedly connected to the sealing plate 822 and is concentrically arranged, and a flow groove 9 is opened inside the sealing plate 822, and a plurality of flow grooves 9 are arranged, and the flow grooves 9 are arranged in a fan shape, and the flow grooves 9 pass through the upper and lower end surfaces of the sealing plate 822, and the plurality of flow grooves 9 are arranged in a ring array with the center of the sealing plate 822 as the center, and an adjusting plate is arranged above the sealing plate 822. 823, and an inner hole is opened at the center of the adjusting plate 823, through which the adjusting plate 823 is rotatably sleeved on the outside of the top rod 101, the lower end surface of the adjusting plate 823 is fitted with the upper end surface of the sealing plate 822, and an adjusting groove 10 is opened on the adjusting plate 823, the adjusting groove 10 runs through the upper and lower end surfaces of the adjusting plate 823, the adjusting groove 10 and the flow groove 9 on the sealing plate 822 are also arranged in a fan shape, and the size of the adjusting groove 10 is the same as the flow groove 9, the number of the adjusting groove 10 is the same as the flow groove 9, and the multiple adjusting grooves 10 are arranged in a circular array with the center of the adjusting plate 823 as the center. By rotating the adjusting plate 823, the adjusting groove 10 and the flow groove 9 are aligned or staggered up and down, thereby adjusting the water flow rate of the piston member 802.

[0033] Therefore, through the above arrangement, when the piston member 802 moves upward under the drive of the push rod 101, the flow groove 9 and the adjustment groove 10 can be aligned vertically by rotating the adjustment plate 823, thereby increasing the water flow rate of the piston member 802, reducing the resistance to the upward movement of the piston member 802, and making the push rod 101 move upward more smoothly. After the push rod 101 moves upward to push out the forging and separates from the separation connector 122, the adjustment plate 823 can be rotated to make the adjustment groove 10 and the flow groove 9 staggered vertically, so that part of the flow groove 9 is covered, thereby reducing the water flow rate of the piston member 802, so that the push rod 101 reduces the downward movement speed when moving downward, so that the staff has sufficient time to take out the forging before the forging descends into the mold cavity 203, avoiding the forging from returning to the mold cavity 203 quickly as the push rod 101 descends, and then after the forging is taken out, the adjustment plate 823 can be rotated again to increase the water flow rate, so that the push rod 101 can be quickly descended alone.

[0034] Specifically, in order to realize the rotation of the adjustment plate 823, as Figure 8-Figure 10 As shown, a guide rod 11 is fixedly arranged on the outer circumferential wall of the adjustment plate 823, and a guide slot 7 is opened on the inner wall of the piston cylinder 801, and the guide rod 11 is movably inserted into the guide slot 7. The slot width of the guide slot 7 matches the outer diameter of the guide rod 11, and the outer wall of the guide rod 11 fits with the slot wall of the guide slot 7; The guide slot 7 is specifically configured to include an enlarged adjustment section 701, a reduced adjustment section 702 and a connecting section 703, wherein the enlarged adjustment section 701 is configured to extend straightly upward from the bottom of the inner wall of the piston cylinder 801, and the reduced adjustment section 702 is configured to extend straightly downward from the top of the inner wall of the piston cylinder 801, and the reduced adjustment section 702 is located above the enlarged adjustment section 701. It should be noted that in the direction of the circumference of the piston cylinder 801, the enlarged adjustment section 701 and the reduced adjustment section 702 are respectively located on the circumference of the piston cylinder 801. Different positions, and specifically configured as follows: when the guide rod 11 is located inside the expanding adjustment section 701, the flow groove 9 is aligned with the adjustment groove 10 up and down, so that the water flow rate is increased; and when the guide rod 11 is located inside the reducing adjustment section 702, part of the space of the flow groove 9 is covered by the upper adjustment plate 823, so that the water flow rate of the piston member 802 is reduced, and the reducing adjustment section 702 is connected to the expanding adjustment section 701 through the connecting section 703, and the connection between the reducing adjustment section 702 and the expanding adjustment section 701 and the connecting section 703 is smoothly transitioned.

[0035] Through the above arrangement, when the piston member 802 moves upward, the guide rod 11 will also be inside the guide slot 7, and when the guide rod 11 is located in the expansion adjustment section 701, the water flow rate of the piston member 802 is large, so that the piston member 802 moves upward smoothly, and when the push rod 101 pushes the forging out, the guide rod 11 will enter the reduction adjustment section 702, thereby reducing the water flow rate at this time, and then after the self-separation connecting member 122 is separated, by reducing the water flow rate, the descending speed of the piston member 802 inside the piston cylinder 801 is slowed down, so that the staff can take out the forging, and then as the piston member 802 moves downward, the guide rod 11 enters the expansion adjustment section 701 again, so that the water flow rate of the piston member 802 becomes larger, and then the piston member 802 descends faster, so that the return speed of the push rod 101 becomes faster.

[0036] A demoulding method for a forged ejection mechanism of a vehicle driving front axle comprises the following steps: Step 1: Place the forging blank in the die cavity 203 of the lower die base 202, and operate the machine tool to move the upper die base 201 downward for forging; Step 2: When the upper die base 201 moves downward, the upper die base 201 first moves downward to drive the connecting rod 2 123 to move downward, and the connecting rod 2 123 moves downward to drive the clamping block 2 28 to move downward. The clamping block 2 228 moves downward to move the clamping block 1 227 forward by contacting the inclined surface of the clamping block 1 227. Therefore, after the upper die base 201 moves downward to drive the clamping block 228 to move downward, after the clamping block 2 228 contacts the inclined surface of the clamping block 1 227, the clamping block 2 228 will pass through the inclined surface. The guide pushes the clamping block 1 227 in the front end direction during the downward movement, and then as the clamping block 228 continues to move downward, it will move to the bottom of the clamping block 1 227. At this time, without the limit of the clamping block 228, the clamping block 1 227 will move to the top of the clamping block 228 through the rebound of the spring 6, and then the upper die seat 201 continues to move downward until the die is closed for forging. After the forging is completed, the machine tool moves the upper die seat 201 upward and resets; Step 3: The upper die base 201 moves upward. The upper die base 201 moves upward. Through the connection between the clamping block 1 227 and the clamping block 2 228, the upper die base 201 drives the connecting rod 121 to move upward, thereby causing the ejector rod 101 to move upward to eject the forging inside the die cavity 203. While the ejector rod 101 moves upward, it drives the piston member 802 to move upward. The guide plug rod 11 moves from the enlarged adjustment section 701 to the reduced adjustment section 702. At this time, the adjustment groove 10 is aligned with the flow groove 9 up and down, so that the water flow rate is increased, and the piston member 802 is smoothly moved upward with less obstruction. When the upper die base 201 continues to move upward, the separation control rod 225 is synchronously moved upward to the upper side of the guide groove 226. When the forging is pushed out, the guide rod 11 moves to the inside of the reducing adjustment section 702, so that the water flow rate decreases. As the upper die seat 201 continues to move upward, the separation control rod 225 is guided by the bevel to move the separation control rod 225 forward, thereby separating the clamping block 1 227 from the clamping block 2 228, and the ejector rod 101 stops moving upward. The ejector rod 101 moves downward due to the gravity and deadweight of the forging. At this time, since the guide rod 11 is located in the reducing adjustment section 702, the water flow rate of the piston member 802 decreases, and the piston member 802 is blocked and the descent slows down, which slows down the descent speed of the ejector rod 101. At this time, the staff removes the forging; Step 4: After the forging is removed, the piston 802 will continue to move downward and allow the guide rod 11 to enter the enlarged adjustment section 701, thereby accelerating the descending speed of the piston 802 and causing the ejector rod 101 to descend and reset.

[0037] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and range of equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A forging ejection mechanism for a front drive axle of a vehicle, comprising a lifting member (1), the lifting member (1) being arranged inside a die cavity (203) of a lower die seat (202) for lifting and demolding a forged part, characterized in that: The lifting member (1) comprises a lift rod (101) and a control mechanism (102) for controlling the lift rod (101) to rise; a through hole (3) is longitudinally provided inside the lower die base (202); the lift rod (101) is slidably inserted inside the through hole (3); and the top surface of the lift rod (101) and the bottom wall of the die cavity (203) of the lower die base (202) form a complete die cavity (203) molding surface; The push rod (101) is configured to be lifted by the upward movement of the upper die seat (201); the control mechanism (102) comprises a connecting rod 1 (121), a self-detachable connecting piece (122) and a connecting rod 2 (123); the outer wall of the push rod (101) is fixedly provided with the connecting rod 1 (121), and the other end of the connecting rod 1 (121) extends to the outside of the lower die seat (202) through a key groove (4); the lower part of the upper die seat (201) is fixedly provided with the connecting rod 2 (123), and the bottom end of the connecting rod 2 (123) is detachably connected to an end of the connecting rod 1 (121) located outside the lower die seat (202) through the self-detachable connecting piece (122); A deceleration mechanism (8) is provided below the push rod (101), and the deceleration mechanism (8) is used to decelerate the downward movement of the push rod (101).

2. A forging ejection mechanism for a front drive axle of a vehicle as claimed in claim 1, characterized in that: The self-separating connecting member (122) comprises a longitudinal moving block (221), a fixed block (222), a transverse moving block (223), a connecting block (224), a separation control rod (225), a guide groove (226), a first clamping block (227) and a second clamping block (228), wherein the longitudinal moving block (221) is fixedly arranged at one end of the connecting rod (121) located outside the lower die base (202), a fixed block (222) is fixedly arranged on one side of the longitudinal moving block (221), and a sliding rod (5) is slidably inserted into the interior of the fixed block (222), and a rear end of the sliding rod (5) is fixedly arranged A lateral movement block (223) is provided, and a connecting block (224) is fixedly provided at the front end of the slide rod (5); a separation control rod (225) is fixedly provided on one side of the connecting block (224); a guide groove (226) is provided on a side of the lower die base (202) facing the separation control rod (225); one end of the separation control rod (225) is inserted into the guide groove (226); the first clamping block (227) is fixedly provided at the rear end of the lateral movement block (223) and its rear end surface is provided as an inclined surface; and a second clamping block (228) is fixedly provided at the bottom of the second connecting rod (123).

3. A forging ejection mechanism for a front drive axle of a vehicle as claimed in claim 2, characterized in that: The top groove wall of the guide groove (226) is arranged to be inclined, and one end of the separation control rod (225) contacts the rear end groove wall of the guide groove (226). A spring (6) is also arranged between the transverse block (223) and the fixed block (222) for supporting the transverse block (223) and the fixed block (222). The length of the second clamping block (228) along the front-to-back direction is greater than the length of the second connecting rod (123) along the front-to-back direction. The connection point between the second connecting rod (123) and the second clamping block (228) is located at the rear end of the upper end surface of the second clamping block (228). The surface of the second clamping block (228) facing the first clamping block (227) is also arranged to be an inclined surface.

4. A forging ejection mechanism for a front drive axle of a vehicle as claimed in claim 3, characterized in that: The deceleration mechanism (8) comprises a piston cylinder (801) and a piston member (802), wherein the piston cylinder (801) is arranged inside the through hole (3) and is filled with liquid, wherein the piston cylinder (801) is slidably provided with a piston member (802) inside the piston cylinder (801), wherein the bottom end of the push rod (101) passes through the top wall of the piston cylinder (801) and extends to the inside of the piston cylinder (801) and is connected to the piston member (802), wherein the connection between the push rod (101) and the top wall of the piston cylinder (801) is provided with a sliding seal, and wherein a flow groove (9) for passing liquid is longitudinally provided inside the piston member (802).

5. A forging ejection mechanism for a front drive axle of a vehicle as claimed in claim 4, characterized in that: The piston member (802) comprises a piston ring (821), a sealing plate (822) and an adjusting plate (823); the outer circumferential wall of the piston ring (821) is slidably sealed with the inner wall of the piston cylinder (801); a sealing plate (822) is fixedly arranged on the top of the piston ring (821); the bottom end of the push rod (101) is fixedly connected to the sealing plate (822) and is arranged concentrically; the circulation groove (9) is opened vertically through the sealing plate (822); an adjusting plate (823) is arranged above the sealing plate (822), and the adjusting plate (823) is rotatably sleeved on the outside of the push rod (101); the adjusting plate (823) and the sealing plate (822) are fitted with each other; an adjusting groove (10) is opened longitudinally through the adjusting plate (823); the adjusting groove (10) and the circulation groove (9) are both arranged in a fan shape and a plurality of them are respectively arranged; the adjusting groove (10) and the circulation groove (9) are both arranged in a ring array.

6. A forging ejection mechanism for a front drive axle of a vehicle as claimed in claim 5, characterized in that: A guide rod (11) is fixedly arranged on the outer circumferential wall of the adjustment plate (823); a guide slot (7) is provided on the inner wall of the piston cylinder (801); the guide rod (11) is movably inserted into the guide slot (7); the guide slot (7) comprises an enlarging adjustment section (701), a reducing adjustment section (702) and a connecting section (703); the enlarging adjustment section (701) is arranged to extend straightly upward from the bottom of the inner wall of the piston cylinder (801); the reducing adjustment section (702) is arranged to extend straightly downward from the top of the inner wall of the piston cylinder (801); the reducing adjustment section (702) is located above the enlarging adjustment section (701); the reducing adjustment section (702) and the enlarging adjustment section (701) are connected via the connecting section (703); and the reducing adjustment section (702) and the enlarging adjustment section (701) are staggered on the circumferential line of the piston cylinder (801).

7. A forging ejection mechanism for a front drive axle of a vehicle as claimed in claim 6, characterized in that: When the guide rod (11) is located inside the enlarging adjustment section (701), the circulation slot (9) and the adjustment slot (10) are aligned vertically; when the guide rod (11) is located inside the reducing adjustment section (702), part of the space of the circulation slot (9) is covered by the upper adjustment plate (823).

8. A demoulding method for a forging ejection mechanism of a vehicle drive front axle according to claim 7, characterized in that: The following steps are involved: Step 1: placing the forging blank in the die cavity (203) of the lower die seat (202), and operating the machine tool so that the upper die seat (201) moves downward for forging; Step 2: The second connecting rod (123) moves downward synchronously with the upper die seat (201) and drives the second clamping block (228) to move downward. The second clamping block (228) moves downward until it contacts the first clamping block (227) and pushes the first clamping block (227) forward. As the second clamping block (228) continues to move downward, it moves to the bottom of the first clamping block (227). At this time, the first clamping block (227) will rebound through the spring (6) to move the first clamping block (227) to the top of the second clamping block (228). Then, the upper die seat (201) continues to move downward until the die is closed for forging. After the forging is completed, the machine tool moves the upper die seat (201) upward and resets. Step 3: The upper die seat (201) moves upwards through the connection between the clamping block 1 (227) and the clamping block 2 (228), so that the upper die seat (201) drives the connecting rod 1 (121) to move upwards, thereby causing the ejector rod (101) to move upwards to eject the forging inside the die cavity (203). When the ejector rod (101) moves upwards, it drives the piston member (802) to move upwards, and the guide rod (11) moves from the enlarged adjustment section (701) to the reduced adjustment section (702). At this time, the adjustment groove (10) and the flow groove (9) are aligned vertically, so that the water flow rate increases. When the upper die seat (201) continues to move upwards, the separation control rod (225) is synchronously moved upwards to the upper bevel of the guide groove (226). When the forging is ejected, the guide rod (11) moves to the inside of the reduction adjustment section (702), reducing the amount of water passing through. As the upper die seat (201) continues to move upward, the separation control rod (225) is guided by the bevel to move the separation control rod (225) forward, thereby separating the clamping block 1 (227) from the clamping block 2 (228). The ejector rod (101) stops moving upward and moves downward due to the gravity and deadweight of the forging. At this time, the guide rod (11) is located inside the reduction adjustment section (702), reducing the amount of water passing through. The piston member (802) moves downward at a slower speed, and the ejector rod (101) moves downward at a slower speed, thereby removing the forging. Step 4: After the forging is removed, the piston (802) will continue to move downward and allow the guide rod (11) to enter the expansion adjustment section (701), thereby accelerating the descending speed of the piston (802), so that after the forging is removed, the ejector rod (101) descends and resets.

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