Die for trimming after forging

Abstract

The invention belongs to the technical field of forging processing, and particularly relates to a post-forging trimming die which comprises a punch, a discharging plate, an air cylinder, an elastic part and a movable plate, the discharging plate movably sleeves the punch and is used for pushing down flashes, a material pushing part is arranged on the discharging plate and comprises the air cylinder connected to a trimming machine, the telescopic end of the air cylinder is connected with a positioning plate, and the elastic part is arranged on the positioning plate. The lower end face of the positioning plate is connected with an elastic piece, the elastic piece comprises a screw and a spring arranged on the screw in a sleeving mode, the screw is movably sleeved with a movable plate, the lower end face of the movable plate is connected with the discharging plate, and a counterbore is formed in the upper end face of the movable plate and used for spring positioning. The push plate and the guide column are matched to move in the guide groove so as to guarantee stable force transmission, the gasket is arranged at the bottom of the movable plate and used for dispersing pressure, the punch controls a bottom dead center to enter the female die by 5-6 mm on a press machine, and rapid stripping of flashes is achieved in combination with pre-compression counter-acting force of the elastic piece and thrust of the air cylinder.

Description

Technical Field

[0001] The invention belongs to the technical field of forging processing, and in particular relates to a forging post-cutting die. Background Art

[0002] In the forging process, in order to meet the size requirements of parts and remove excess flash, trimming dies are widely used in the subsequent processing of forgings. Traditional trimming dies are mainly composed of punches and dies. During trimming, the punch enters the die and cuts off the flash around the forging. However, in actual applications, the cut flash is often wrapped around the punch, and the forging falls from the die. Under this structure, the flash usually needs to be manually knocked or removed manually, which cannot meet the beat stability requirements of modern automated forging production lines.

[0003] In order to improve production efficiency and reduce the amount of work done by workers, some technical solutions introduce a rigid stripper plate into the trimming die. The stripper plate is rigidly connected to the die. When the punch moves up, the flash is blocked by the stripper plate, and the flash falls off the punch. However, due to the limited space between the stripper plate and the die, this structure is difficult to arrange automated devices and cannot fully meet the needs of the forging intelligent production line.

[0004] In addition, in order to meet the needs of automated production, some technologies apply the elastic stripper plate structure in the stamping die to the forging trimming die. The elastic stripper plate is connected to the upper die part through a spring. When the punch enters the die, the spring is compressed. After the trimming is completed, as the punch rises, the spring reaction force will eject the flash and realize the flash removal. The advantage of this structure is that there is a large space when the mold is opened, and it is easy to arrange the automated device. However, the disadvantage of this solution is that when the spring returns to a free state, the flash is easy to remain on the die, resulting in the inability of the automated manipulator to remove the flash in time according to the beat, affecting the efficiency and stability of automated production.

[0005] In view of the above technical deficiencies, some structural designs combining cylinders and springs have emerged. By combining the cylinder with the rectangular spring, the pre-compression of the rectangular spring is used to provide sufficient unloading force, so that the flash during trimming can fall off the punch smoothly, and at the same time, the necessary flash pressing force is provided to ensure the stability of the position of the forging during trimming and prevent the forging from deformation or warping. However, when the punch needs to enter 5-6mm below the die edge to ensure the smooth fall of the forging, the clamping force of the cut flash will increase over time due to the influence of thermal expansion and contraction, resulting in the need for greater unloading force, which is difficult to meet by simply relying on the thrust provided by the cylinder.

[0006] Therefore, the current post-forging trimming die still has the following technical problems in the flash unloading process: how to reasonably arrange the die structure in a limited space, and use the synergy of the spring and the cylinder to provide sufficient unloading force and flash pressing force, so as to ensure the quality of the forgings while achieving fast and stable flash removal, and meet the automation requirements of the forging intelligent production line. This technical problem needs to be solved urgently. Summary of the invention

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide a forging back trimming die, which can realize the fast and stable removal of the flash from the punch.

[0008] To achieve the above object, the present invention provides the following technical solutions: A forging post-trimming die comprises a punch for trimming a forged workpiece, a stripper plate is movably sleeved on the punch, the stripper plate is used to push down the flash wrapped on the punch, and a pusher is arranged on the upper end surface of the stripper plate, and the pushers are diagonally distributed on the stripper plate; The pusher comprises a cylinder connected to the trimming machine, the cylinder is connected to a positioning plate, and the lower end surface of the positioning plate is connected to an elastic member; The elastic member comprises a screw connected to the bottom of the positioning plate, and a spring is sleeved on the screw; The movable sleeve on the screw is provided with a movable plate, the movable plate is located at the bottom of the spring, and the lower end surface of the movable plate is connected with the unloading plate.

[0009] Further, the cylinder comprises a cylinder body, and a push plate is connected to the telescopic end of the cylinder body; The bottom of the cylinder body is symmetrically provided with guide grooves; The upper end surface of the push plate is fixedly connected with a guide column corresponding to the guide groove; The guide post extends into the guide groove.

[0010] Furthermore, a threaded hole is symmetrically provided on the lower end surface of the push plate, and a first connecting hole corresponding to the threaded hole is penetrated through the bottom of the positioning plate.

[0011] Furthermore, guide holes are symmetrically formed through the positioning plate, the guide holes correspond to the screws, and one end of the screw is connected to the guide hole.

[0012] Furthermore, a countersunk hole corresponding to the spring is symmetrically opened on the upper end surface of the movable plate, and the bottom end of the spring extends into the countersunk hole.

[0013] Furthermore, a gasket is provided at the bottom of the movable plate, and a second through hole is symmetrically opened on the gasket; A second connecting hole corresponding to the second through hole is formed through the upper end surface of the movable plate; The gasket is penetrated by a first through hole corresponding to the countersunk hole.

[0014] Furthermore, a connecting plate is fixedly connected to the top of the cylinder body, and fixing holes are symmetrically opened on the connecting plate.

[0015] Furthermore, the maximum compression of the spring is 20% of its own length.

[0016] Furthermore, when the punch is mounted on the press, its bottom dead point is 5-6 mm from the punch into the die.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention realizes the efficient stripping function of the cut flash through the active cooperation between the stripper plate and the punch. During the trimming operation, the flash is wrapped around the punch. When the punch rises, the stripper plate contacts and presses the flash, and the combined force of the cylinder and the elastic member is used to push the flash out of the punch. The elastic member provides a stable flash pressing force through pre-compression to ensure that the forging does not deform during the trimming process, and at the same time enables the flash to be stably separated from the punch. This structure solves the problem that the traditional rigid stripper has limited space and cannot arrange automated equipment, and improves the stability and efficiency of the unloading process.

[0018] The present invention effectively solves the shortcomings of a single elastic stripper plate structure by combining the use of a cylinder and a spring. During the trimming process, the cylinder provides an initial thrust to push the stripper plate upward, while the spring generates a reaction force through a pre-compression state to ensure that the stripper plate can stably push out the flash. The maximum compression of the spring 342 is limited to 20% of its own length, ensuring that the spring will not be damaged due to excessive compression during operation, while having sufficient resilience; this design avoids the problem of flash remaining on the die, ensuring that the manipulator can accurately remove the flash according to the production rhythm, thereby meeting the requirements of the forging intelligent production line.

[0019] The present invention sets a guide groove at the bottom of the cylinder body of the cylinder, and sets a guide column on the push plate. The guide column and the guide groove cooperate with each other to realize the smooth operation of the push plate in the cylinder, prevent the push plate from deflecting, and ensure the stability and accuracy of the thrust transmission path. In addition, the positioning plate and the push plate are fixed by threaded holes and connecting holes, which further enhances the stability of the pusher; the elastic member under the positioning plate is precisely positioned by the guide hole and the screw, ensuring that the spring is evenly stressed and avoiding the spring from deflecting during the compression process. This structure effectively improves the reliability of the mold and avoids the jamming phenomenon during the unloading process.

[0020] The movable plate structure of the present invention has been carefully designed. The upper end surface of the movable plate is provided with a countersunk hole for accurate positioning of the bottom end of the spring to ensure the stability of the force state of the spring. A gasket is arranged at the bottom of the movable plate to achieve a stable connection with the unloading plate through the second through hole and the second connecting hole. The gasket effectively disperses the pressure transmitted by the movable plate, reduces structural wear during the unloading process, and prolongs the service life of the mold. In addition, through the cooperation of the screws and the guide holes, the movable plate can move up and down, and smoothly transmit the reaction force of the elastic member to the unloading plate, ensuring the smooth detachment of the flash during the unloading process.

[0021] The present invention controls the bottom dead point of the punch on the press so that the punch enters the die 5-6mm, achieving the function of smoothly dropping the forging; at a position 5-6mm above the punch, the flash is pushed out by the combined force of the elastic member and the cylinder, thereby solving the problem that the flash is difficult to separate from the punch due to the increased clamping force due to thermal expansion and contraction. Through this design, the automation level of the trimming process is effectively improved, the stability of the production cycle is guaranteed, and the needs of modern forging intelligent production lines are met.

[0022] In summary, the present invention solves the technical problems of the inability of traditional trimming dies to stably remove materials, limited structural space, and easy residual burrs in automated production lines by integrating reasonable structural design and coordinated work of components such as cylinders, elastic parts, unloading plates and movable plates. The present invention has a reasonable structural design and has an efficient and stable unloading function, which can meet the requirements of intelligent production, reduce the labor intensity of workers, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A top view of the present invention; Figure 2 It is a front view of the present invention; Figure 3 It is a structural schematic diagram of the material pushing member of the present invention; Figure 4 It is a structural schematic diagram of the cylinder of the present invention; Figure 5 It is a structural schematic diagram of the positioning plate of the present invention; Figure 6 It is a structural schematic diagram of the movable plate of the present invention; Figure 7 It is a schematic structural diagram of the elastic member of the present invention.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Unloading plate; 2. Punch; 3. Pushing parts; 31. Cylinder; 311, cylinder body; 3111, guide groove; 312, connecting plate; 3121, fixing hole; 313, push plate; 3131, guide column; 3132, threaded hole; 32. Positioning plate; 321. Guide hole; 322. First connecting hole; 33, movable plate; 331, second connecting hole; 332, countersunk hole; 333, gasket; 3331, first through hole; 3332, second through hole; 34. Elastic part; 341. Screw; 342. Spring. DETAILED DESCRIPTION

[0025] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0026] See also Figure 1-7 A post-forging trimming die comprises a punch 2 for trimming a forged workpiece; a stripper plate 1 is movably sleeved on the punch 2, and the stripper plate 1 is used to push down the flash wrapped on the punch 2; during the forging process, the flash will generate a clamping force due to thermal expansion and contraction, resulting in an increase in the demand for the stripping force; therefore, the stripper plate 1 achieves stable unloading through a reasonable structural design; a pusher 3 is provided on the upper end surface of the stripper plate 1, and the pusher 3 is diagonally distributed on the stripper plate 1, and is used to provide a balanced thrust for the stripper plate 1; the pusher 3 comprises a cylinder 31 connected to the trimming machine, and the cylinder 31 provides an initial thrust for the stripper plate 1 to ensure that the flash can be smoothly separated from the punch 2; a positioning plate 32 is connected to the telescopic end of the cylinder 31 The positioning plate 32 is used to transmit the thrust of the cylinder 31; the lower end surface of the positioning plate 32 is connected to an elastic member 34, and the elastic member 34 includes a screw 341 connected to the bottom of the positioning plate 32, and a spring 342 is sleeved on the screw 341; the spring 342 provides sufficient reaction force through pre-compression to ensure that the unloading plate 1 can be stably reset after trimming, and at the same time provides flash pressing force to prevent the forging from deforming during trimming; a movable plate 33 is movably sleeved on the screw 341, and the movable plate 33 is located at the bottom of the spring 342; the movable plate 33 evenly distributes the unloading force to the unloading plate 1 through the force transmission path to ensure the stability of the unloading process; the lower end surface of the movable plate 33 is connected to the unloading plate 1 to form a stable unloading structure.

[0027] See also Figure 1-7The cylinder 31 includes a cylinder body 311, which serves as the main structure of the cylinder and provides a power source; the telescopic end of the cylinder body 311 is connected to a push plate 313, which is used to transmit the thrust of the cylinder 31 to the unloading plate 1; to ensure the smooth operation of the push plate 313, the bottom of the cylinder body 311 is symmetrically provided with guide grooves 3111, which provide precise guidance for the movement of the push plate 313; the upper end surface of the push plate 313 is fixedly connected with a guide column 3131 corresponding to the guide groove 3111, and the guide column 3131 extends into the guide groove 3111 to achieve stable sliding of the push plate 313 in the cylinder 31; the cooperation between the guide column 3131 and the guide groove 3111 effectively prevents the push plate 313 from deflecting, thereby ensuring the stability of the thrust transmission.

[0028] See also Figure 1-7 The lower end surface of the push plate 313 is symmetrically provided with a threaded hole 3132; the threaded hole 3132 corresponds to the first connecting hole 322 that passes through the bottom of the positioning plate 32; the first connecting hole 322 is used to fix the positioning plate 32 and the push plate 313 to form a stable thrust transmission path; through the cooperation of the threaded hole 3132 and the first connecting hole 322, the overall structure of the pusher 3 is ensured to be firm, avoiding loosening or deviation during operation.

[0029] See also Figure 1-7 The positioning plate 32 is symmetrically provided with guide holes 321, which correspond to the screws 341; one end of the screw 341 is connected to the guide hole 321 to guide and position the screw 341; the design of the guide hole 321 ensures the force stability of the spring 342 and avoids the spring 342 from deflecting when being compressed or released; at the same time, through the guide hole 321, the screw 341 can move smoothly on the positioning plate 32 to ensure the stable operation of the elastic member 34.

[0030] See also Figure 1-7 The upper end surface of the movable plate 33 is symmetrically provided with a countersunk hole 332 corresponding to the spring 342; the countersunk hole 332 is used to accommodate the bottom end of the spring 342, so that the spring 342 always maintains uniform force during the compression process; the bottom end of the spring 342 extends into the countersunk hole 332, and through the structural design of the countersunk hole 332, the elastic force of the spring 342 can be effectively transmitted to the movable plate 33, thereby realizing a stable unloading process.

[0031] See also Figure 1-7A gasket 333 is provided at the bottom of the movable plate 33. The gasket 333 serves as a buffer structure between the movable plate 33 and the unloading plate 1, and effectively disperses the pressure transmitted by the movable plate 33; second through holes 3332 are symmetrically opened on the gasket 333, and the second through holes 3332 are used for fixing and penetrating the screws 341; a second connecting hole 331 corresponding to the second through hole 3332 is opened on the upper end surface of the movable plate 33, and the second connecting hole 331 further strengthens the connection strength between the movable plate 33 and the gasket 333; a first through hole 3331 corresponding to the countersunk hole 332 is also opened on the gasket 333, and the first through hole 3331 is used for positioning and installing the spring 342, to ensure that the spring 342 is subjected to uniform force and does not displace in the working state.

[0032] See also Figure 1-7 A connecting plate 312 is fixedly connected to the top of the cylinder body 311. The connecting plate 312 serves as a fixing component between the cylinder 31 and the trimmer to provide stable support for the cylinder 31. Fixing holes 3121 are symmetrically opened on the connecting plate 312. The fixing holes 3121 are used to firmly mount the connecting plate 312 on the trimmer to ensure the stability of the cylinder 31 during operation. The fixed connection between the connecting plate 312 and the cylinder body 311 enables the cylinder 31 to maintain stable operation during the extension and retraction process to avoid shaking or deviation.

[0033] See also Figure 1-7 , the maximum compression of the spring 342 is 20% of its own length; by limiting the compression of the spring 342, it is ensured that the spring 342 still has sufficient resilience in the maximum compression state to prevent the spring 342 from being damaged due to excessive compression; at the same time, the unloading force provided by the spring 342 works together with the thrust of the cylinder 31 to achieve rapid detachment of the flash.

[0034] See also Figure 1-7 When the punch 2 is installed on the press, its bottom dead point is 5-6mm from the punch into the die; by controlling the bottom dead point of the punch 2, the forging can be smoothly removed from the die after trimming, thereby reducing the friction resistance between the forging and the die; at the same time, the flash is pushed out by the combined force of the spring 342 and the cylinder 31 at a position 5-6mm above the punch 2, thereby ensuring that the flash can quickly detach from the punch 2, thereby meeting the requirements for efficient operation of the intelligent forging production line.

[0035] The working principle of the present invention is: During the trimming operation, the flash cut off from the forging will be wrapped around the punch 2. When the punch 2 rises, the flash will also rise synchronously with the punch 2. During the rising process, the flash will contact the lower end surface of the stripper plate 1 and apply pressure to the bottom surface of the stripper plate 1. The pressure is transmitted to the movable plate 33 connected to the stripper plate 1 through the stripper plate 1. The movable plate 33 also applies pressure to the spring 342 mounted on the screw 341, causing the spring 342 to undergo elastic deformation. When the compression of the spring 342 reaches the maximum value, the cylinder 311 starts to run and applies pressure to the top of the spring 342 through the positioning plate 32. The pressure is transmitted to the stripper plate 1 through the spring 342 and the movable plate 33, thereby pushing down the flash wrapped around the punch 2.

[0036] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A forging post-trimming die, comprising a punch (2) for trimming a forged workpiece, a stripper plate (1) being movably sleeved on the punch (2), the stripper plate (1) being used to push down the flash wrapped on the punch (2), characterized in that: The upper end surface of the discharge plate (1) is provided with a material pushing piece (3), and the material pushing piece (3) is distributed diagonally on the discharge plate (1); The pusher (3) comprises a cylinder (31) connected to the trimmer, the cylinder (31) is connected to a positioning plate (32) at the top, and the lower end surface of the positioning plate (32) is connected to an elastic member (34); The elastic member (34) comprises a screw (341) connected to the bottom of the positioning plate (32), and a spring (342) is sleeved on the screw (341); A movable plate (33) is provided on the movable sleeve of the screw (341). The movable plate (33) is located at the bottom of the spring (342), and the lower end surface of the movable plate (33) is connected to the discharge plate (1).

2. The forging post-trimming die according to claim 1, characterized in that: The cylinder (31) comprises a cylinder body (311), and a push plate (313) is connected to the telescopic end of the cylinder body (311); The bottom of the cylinder body (311) is symmetrically provided with guide grooves (3111); A guide post (3131) corresponding to the guide groove (3111) is fixedly connected to the upper end surface of the push plate (313); The guide post (3131) extends into the guide groove (3111).

3. The forging post-trimming die according to claim 2, characterized in that: A threaded hole (3132) is symmetrically provided on the lower end surface of the push plate (313), and a first connecting hole (322) corresponding to the threaded hole (3132) is penetrated through the bottom of the positioning plate (32).

4. The forging post-trimming die according to claim 2, characterized in that: The positioning plate (32) is symmetrically provided with guide holes (321), the guide holes (321) correspond to the screws (341), and one end of the screws (341) is connected to the guide holes (321).

5. The forging post-trimming die according to claim 2, characterized in that: A countersunk hole (332) corresponding to the spring (342) is symmetrically opened on the upper end surface of the movable plate (33), and the bottom end of the spring (342) extends into the countersunk hole (332).

6. The forging post-trimming die according to claim 1, characterized in that: A gasket (333) is provided at the bottom of the movable plate (33), and second through holes (3332) are symmetrically formed through the gasket (333); A second connection hole (331) corresponding to the second through hole (3332) is formed through the upper end surface of the movable plate (33); The gasket (333) is provided with a first through hole (3331) corresponding to the countersunk hole (332).

7. The forging post-trimming die according to claim 2, characterized in that: A connecting plate (312) is fixedly connected to the top of the cylinder body (311), and fixing holes (3121) are symmetrically formed through the connecting plate (312).

8. The forging post-trimming die according to claim 1, characterized in that: The maximum compression of the spring (342) is 20% of its own length.

9. The forging post-trimming die according to claim 1, characterized in that: When the punch (2) is mounted on the press, its bottom dead point is 5-6 mm from the punch into the die.

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