Cold forging press lower knockout device

Abstract

The present application relates to metal plastic forming equipment technical field, specifically, a kind of cold forging press bottom ejector, comprising: cold forging machine body, the cold forging machine body has workbench, the workbench is used to lay lower die, the cold forging machine body and the workbench are provided with relay type jacking part, according to the characteristics of forging and lower die, first with slow, smooth jacking, with speed-up jacking seamless relay type ejection to forging is forced to eject, that is, ensure not to damage forging, also maximize to improve production efficiency, prevent on the production efficiency of ejection link to produce influence, in the process of completing ejection return stroke, it can be simultaneously cleaned to the inside of lower die cavity, so that the oxide scale scrap and other residual foreign matter produced in the process of forging in lower die cavity is removed, the ejection action and die cleaning function are organically combined, the removal of residual foreign matter in lower die cavity is realized, the cleanliness of lower die cavity is restored, and then the forging quality and die life are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of metal plastic forming equipment technology, and more specifically, to a lower ejector device for a cold forging press. Background Technology

[0002] A cold forging press is a forging device that applies pressure to a metal billet at room temperature, causing it to flow plastically within a die to obtain parts of the desired shape and size. Compared to hot forging, cold forging offers higher forming precision, better surface quality, and higher material utilization. Furthermore, due to the work hardening effect, the strength of the forgings is significantly improved. Therefore, cold forging plays a crucial role in the mass production of precision parts.

[0003] The forming process of cold forging is accompanied by strong metal flow. The contact pressure between the forging and the mold cavity surface is large. After forming, the forging is often tightly attached to the lower mold cavity and cannot be detached by gravity. This requires the cold forging press to be able to force the forging out of the lower mold.

[0004] Existing ejector devices, such as those using connecting rods, cams, and hydraulic ejector devices, have significant shortcomings. The connecting rod structure connects the ejector rod to the press slide. When the slide returns upwards, the connecting rod drives the ejector rod to rise synchronously, passing through the worktable and ejecting the forging from the lower die. This structure is simple, requires no additional power source, and the ejector action is synchronized with the slide movement. However, the ejector stroke and slide stroke are in a fixed ratio, making independent adjustment based on die height and forging shape impossible. Changing to dies with different heights often requires a cumbersome adjustment process. Furthermore, the ejector force directly depends on the slide return force, making independent control of the encasing force for different forgings impossible. Hydraulic ejector devices... The material ejector controls the lifting and lowering of the piston rod through a hydraulic system, pushing the ejector rod to eject the forging. The ejection force is adjustable, and the ejection stroke can be set as needed, making it more adaptable. However, after cold forging, the forging and the lower mold cavity are in a completely fitted state, and the contact surface bears huge residual pressure. This means that in the initial stage of ejection, what needs to be overcome is not sliding friction, but strong static friction. Therefore, the initial stage of ejection needs to be slow and stable to overcome static friction and prevent impact damage to the forging. After the forging starts to move, it can be accelerated appropriately to improve efficiency. However, both the hydraulic ejector and the linkage structure eject at a basically uniform speed throughout the process, which affects the overall production efficiency to some extent. Summary of the Invention

[0005] The purpose of this invention is to provide a material ejector device for a cold forging press to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides a lower ejector device for a cold forging press, comprising: a cold forging press body, a worktable on the cold forging press body, the worktable being used to arrange the lower die, and a relay-type lifting part being provided on the cold forging press body and the worktable; The relay-type lifting unit can continuously lift upwards at varying speeds to force the forging out of the lower mold cavity through the worktable; The relay-type lifting section can push out the forgings in the lower mold cavity to different degrees with different lifting forces; The relay-type lifting section can add a lubricating medium between the forging and the lower die to facilitate the demolding of the forging; The relay-type lifting unit brushes away residual foreign matter inside the lower mold during the return stroke. Further, the relay-type lifting unit includes: A screw jack, wherein the screw jack is installed inside the cold forging machine and located below the worktable; Hydraulic cylinders, two of which are respectively disposed on both sides of the screw jack; A top material beam is connected to the output shafts of the two hydraulic cylinders, and the output end of the screw jack is aligned upwards with the middle of the top material beam. A plurality of the aforementioned sliding sleeves are disposed within the worktable, with both ends of the plurality of sliding sleeves extending out of the worktable; A plurality of the top material rods are connected to the top material crossbeam, and the plurality of the top material rods are vertically upward and respectively fit and pass through the plurality of the slip sleeves; The lubrication brush assembly consists of two sets of lubrication brush assemblies, one part of which is respectively set on the two top material rods on the outer side, and the other part is evenly distributed on the cold forging machine body; When the screw jack and the two hydraulic cylinders are started respectively, the top beam can be lifted upwards, so that the top rods can be pushed upwards along the straight line of the sleeves.

[0007] Furthermore, the cold forging machine body is provided with two cylindrical bases, and the inner walls of the two cylindrical bases are provided with annular inner liner. A metal platform plate is slidably installed inside the annular inner liner. Several arc-shaped electromagnets are embedded in the circumference of the annular inner liner, and the several arc-shaped electromagnets are connected to an external power supply. Several of the aforementioned arc-shaped electromagnets are in contact with the side of the metal platform disk; The two hydraulic cylinders are respectively mounted on the two metal platform panels.

[0008] Furthermore, the lubrication brush assembly includes: A ring-moving structure, wherein the ring-moving structure is embedded in the top material rod; A movable top plate, which is mounted on the annular structure; A back pad, which is fixedly installed on the movable top piece and located at the rear; A flexible air tube is disposed on the movable top plate and adjacent to the back pad; A rigid handle is mounted on the movable top plate by a torsion spring and located in front of the back pad and the soft air tube. The rigid handle and the back pad squeeze the soft air tube in the middle. A long strip airbag is vertically mounted on the rigid handle. The bottom of the long strip airbag is connected to a connecting pipe, which passes through the rigid handle and connects to the flexible air tube. A concealed groove is opened on the side of the top material rod. When the long strip airbag is upright, it enters the concealed groove so that the long strip airbag does not protrude from the top material rod. An air pump, which is mounted on the body of the cold forging machine; The conveying pipe is connected to the air pump, and the conveying pipe is connected to the flexible air pipe through the inside of the top material rod; A metering pump is installed on the cold forging machine body. The lower end of the metering pump is connected to the conveying pipe, and the upper end is connected to the outlet of the hopper containing lubricating fluid. The top of the elongated air bag has several small leaks.

[0009] Furthermore, the ring-shifting structure includes: An arc-shaped groove is embedded in the side of the top material rod, and the movable top plate is slidably mounted on the top of the arc-shaped groove; A sliding vertical bar, wherein the sliding vertical bar is slidably disposed within the arc-shaped groove; The two air pipes are concealed inside the top material rod and are connected to an external high-pressure air pump through the inside of the top material rod. Two metal shaping strips are inserted into the two air tubes at one end and extend from both sides of the arc-shaped groove into the arc-shaped groove, respectively connecting to the two sides of the sliding vertical strip. The end of the metal shaping strip inserted into the air tube is disc-shaped and slides in close to the air tube.

[0010] Furthermore, the metal shaping strip is attached to the inner wall of the arc-shaped groove.

[0011] Furthermore, the surface of the elongated airbag has rubber bumps.

[0012] Furthermore, the ejector device of the cold forging press also includes several hollow rings respectively disposed on the top of several of the sleeves, and the several hollow rings are flush with the worktable, and several suction ports are opened on the several hollow rings. Each of the hollow rings is connected to a connecting pipe, which connects to an external negative pressure suction device through the inside of the workbench.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a relay-type lifting section to generate powerful force, uniformly and forcefully lifting the forging to ensure its smooth ejection from the lower die, completing the ejection process. The relay-type lifting section is completely independent, not relying on the power of the cold forging machine itself, offering high flexibility. The lifting force and height can be independently adjusted according to the die height, forging shape, and die clamping force, resulting in high adaptability and ensuring better application in actual ejection processes. Targeting the characteristics of the forging and lower die, the relay-type lifting section first uses a slow, stable lifting motion, followed by a rapid, seamless relay ejection to forcefully eject the forging. This ensures no damage to the forging and maximizes overall production efficiency, preventing... The ejection process impacts production efficiency. The relay-type lifting unit continuously applies lubricant between the forging and the lower die during the lifting process, significantly reducing the difficulty of ejection and effectively promoting the demolding process of the forging, thereby further improving efficiency. At the same time, it avoids excessive friction that could damage the forging, ensuring safe ejection. In addition, during the return stroke of the ejection process, the relay-type lifting unit can simultaneously clean the interior of the lower die cavity, removing residual foreign matter such as oxide scale and debris generated during the forging process. This organically combines the ejection action with the die cleaning function, achieving the removal of residual foreign matter in the lower die cavity, restoring the cleanliness of the lower die cavity, and thus ensuring the quality of the forging and the life of the die. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 A perspective view of the present invention is shown; Figure 2 A second perspective view of the present invention is shown; Figure 3 A third perspective view of the present invention is shown; Figure 4 A fourth perspective view of the present invention is shown; Figure 5 A fifth perspective view of the present invention is shown; Figure 6 A sixth perspective view of the present invention is shown; Figure 7 A seventh perspective view of the present invention is shown; Figure 8 An eighth perspective view of the present invention is shown; Figure 9 A ninth perspective view of the present invention is shown; Figure 10 The present invention is shown. Figure 4 Enlarged view of point A; Figure 11 The present invention is shown. Figure 5 Enlarged view of point B; Figure 12 The present invention is shown. Figure 6 Enlarged view of point C; Figure 13 The present invention is shown. Figure 6 Enlarged view of point D; Figure 14 The present invention is shown. Figure 7 Enlarged view of point E; Figure 15 The present invention is shown. Figure 8 Enlarged view at point F; Figure 16 The present invention is shown. Figure 9 Enlarged view of point G.

[0016] In the figure, the same reference numerals represent the same structural element, wherein: 1. Cold forging machine body; 2. Worktable; 3. Relay lifting unit; 31. Screw jack; 32. Hydraulic cylinder; 33. Top material beam; 34. Slipper; 35. Top material rod; 36. Lubrication brush assembly; 361. Ring-moving structure; 3611. Arc groove; 3612. Sliding vertical bar; 3613. Air pipe; 3614. Metal shaping soft strip; 362. Movable top plate; 363. Back pad; 364. Soft air pipe; 365. Hard handle; 366. Long strip air bag; 367. Air pump; 368. Delivery pipe; 369. Metering pump; 4. Cylindrical base; 5. Annular inner liner; 6. Metal platform plate; 7. Arc-shaped electromagnet; 8. Hollow ring; 9. Suction port. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0018] like Figures 1-16 As shown, a cold forging press lower ejector device includes: a cold forging press body 1, a worktable 2 on the cold forging press body 1, the worktable 2 being used to set the lower die, and a relay-type lifting part 3 being provided on the cold forging press body 1 and the worktable 2. The relay-type lifting unit 3 can continuously lift upwards at different speeds to force the forging out of the lower mold cavity through the worktable 2; The relay-type lifting section 3 can eject the forgings in the lower mold cavity to different degrees with different lifting forces; The relay-type lifting section 3 can add a lubricating medium between the forging and the lower die to facilitate the demolding of the forging; The relay-type lifting section 3 sweeps away residual foreign objects inside the lower die during the return stroke. It generates powerful force to uniformly and forcefully lift the forging, ensuring its smooth ejection from the lower die and completing the ejection process. Furthermore, the relay-type lifting section 3 is completely independent, not relying on the power of the cold forging machine body 1 itself, offering high flexibility. The lifting force and height can be independently adjusted according to the die height, forging shape, and the magnitude of the encasing force, resulting in high adaptability and ensuring better application in actual ejection processes. Targeting the characteristics of the forging and lower die, the relay-type lifting section 3 first uses a slow, stable lifting motion, followed by a rapid, seamless relay-type ejection to forcefully eject the forging, ensuring no damage to the forging and maximizing efficiency. To improve overall production efficiency and prevent any impact on production efficiency during the ejection process, the relay-type lifting unit 3 continuously applies lubricant between the forging and the lower die during the ejection process. This significantly reduces the difficulty of ejection, effectively promotes the demolding process of the forging, and further improves efficiency. At the same time, it avoids excessive friction that could damage the forging, ensuring safe ejection. In addition, during the return stroke of the ejection process, the relay-type lifting unit 3 can simultaneously clean the interior of the lower die cavity, removing residual foreign matter such as oxide scale and debris generated during the forging process. This organically combines the ejection action with the die cleaning function, achieving the removal of residual foreign matter in the lower die cavity, restoring the cleanliness of the lower die cavity, and thus ensuring the quality of the forging and the life of the die.

[0019] Optionally, the relay-type lifting unit 3 includes: Screw jack 31 is installed inside the cold forging machine body 1 and located below the worktable 2; Two hydraulic cylinders 32 are respectively installed on both sides of the screw jack 31; The top material beam 33 is connected to the output shaft of two hydraulic cylinders 32, and the output end of the screw jack 31 is aligned upward with the middle of the top material beam 33. Slipper 34, several slipper 34 are set inside the workbench 2, and the two ends of several slipper 34 extend out of the workbench 2; A number of top material rods 35 are connected to the top material crossbeam 33, and the number of top material rods 35 are vertically upward and respectively attached to and pass through a number of sliding sleeves 34; Lubrication brush assembly 36: Two sets of lubrication brush assemblies 36 are respectively set on the two top material rods 35 on the outer side, and the other part is evenly distributed on the cold forging machine body 1; When the screw jack 31 and the two hydraulic cylinders 32 are started respectively, the top beam 33 can be lifted upwards, so that several top rods 35 can be pushed upwards in a straight line along several sleeves 34. The speed of the hydraulic cylinder 32 is faster than that of the screw jack 31. However, the screw jack 31 is driven directly by the rotation of the motor, and the mechanical parts are in rigid contact. When it is necessary to start a heavy object, the torque can continue to accumulate until the force exceeds the critical point of static friction. This breakthrough process is relatively crisp. Once the movement begins, due to the linear relationship of the mechanical transmission, the speed is high. It can be immediately controlled within an extremely low range. Therefore, during the ejection process, the screw jack 31 is first activated to lift the ejection beam 33 (simultaneously, two hydraulic cylinders 32 are activated to move synchronously with the screw jack 31), thereby lifting several ejection rods 35 and causing them to move continuously upward until they enter the lower die on the worktable 2. Afterward, several ejection rods 35 make contact with the forging at multiple points, evenly transmitting the lifting force to the forging, breaking through static friction, and slowly and steadily lifting the forging. After passing through the initial lifting stage, the screw jack is stopped once the forging begins to move. While machine 31 continues to operate, the two hydraulic cylinders 32 are kept running, and the two hydraulic cylinders 32 are used for ejection. At this time, the screw jack 31 disengages from the ejection beam 33, completing the relay. Compared with the ejection by the screw jack 31, the two hydraulic cylinders 32 can achieve a faster ejection speed, ejecting the forging completely from the lower die more quickly and holding it in place. The forging is lifted evenly and powerfully, ensuring that it is successfully forced out of the lower die, completing the ejection action. Furthermore, the hydraulic cylinders 32 and the screw jack 31 are used as the ejection power sources, which are completely independent. It does not rely on the power of the cold forging machine body 1 itself, has high flexibility, and can independently adjust the lifting force and lifting height according to the mold height, forging shape and the magnitude of the mold wrapping force. It has high adaptability, thus ensuring that it can be better applied to the actual ejection process. In addition, considering the characteristics of the forging and the lower mold, it first uses slow and stable lifting, and then uses high-speed lifting to force the forging out in a seamless relay ejection. This ensures that the forging is not damaged and maximizes the overall production efficiency, preventing the ejection process from affecting the production efficiency.

[0020] Optionally, the cold forging machine body 1 is provided with two cylindrical bases 4, and the inner walls of the two cylindrical bases 4 are provided with annular inner liner 5. A metal platform plate 6 is slidably installed inside the annular inner liner 5. Several arc-shaped electromagnets 7 are embedded in the circumference of the annular inner liner 5. The several arc-shaped electromagnets 7 are connected to an external power supply. Several arc-shaped electromagnets 7 are attached to the side of the metal platform disk 6; Two hydraulic cylinders 32 are respectively mounted on two metal platform plates 6. When the screw jack 31 is started to lift the material, the two hydraulic cylinders 32 are not started initially, allowing the screw jack 31 to lift the material independently. At this time, the lifting beam 33 moves upward, pulling the two hydraulic cylinders 32 upward. The metal platform plate 6 then moves upward along the annular inner liner 5. After the forging begins to move, the screw jack 31 is stopped and the external power supply is immediately turned on, energizing several arc-shaped electromagnets 7 to generate attraction, firmly holding the metal platform plate 6 in place, thus fixing the two hydraulic cylinders 32 in their current position. Simultaneously, the two hydraulic cylinders 32 are started, and the lifting is then performed by the two hydraulic cylinders 32. The hydraulic cylinders 32 accumulate energy by compressing hydraulic fluid, thus breaking through static... During friction, the accumulated energy is released instantly, resulting in a forward surge. This method prevents the hydraulic cylinder 32 from participating in the initial lifting stage of breaking static friction, ensuring that only the screw jack 31 performs reliable, slow, and stable lifting, avoiding excessive impact force that could damage the forging. This further highlights the targeted lifting method. After lifting is completed, the external power supply is turned off, and the attraction of several arc-shaped electromagnets 7 to the metal platform plate 6 disappears. The metal platform plate 6 loses its fixed point and falls naturally under the weight of the metal platform plate 6, the hydraulic cylinder 32, and the lifting beam 33, ensuring that the metal platform plate 6, the hydraulic cylinder 32, the lifting beam 33, and several lifting rods 35 are reset for the next lifting operation.

[0021] Optionally, the lubrication brush assembly 36 includes: The ring-moving structure 361 is embedded in the top material rod 35; The movable top plate 362 is mounted on the ring-moving structure 361; Back pad 363 is fixedly installed on the movable top piece 362 and located at the rear; The flexible air tube 364 is mounted on the movable top plate 362 and is close to the back pad 363. The rigid handle 365 is mounted on the movable top plate 362 by a torsion spring and is located in front of the back pad 363 and the soft air tube 364. The rigid handle 365 and the back pad 363 squeeze the soft air tube 364 in the middle. The long strip airbag 366 is vertically mounted on the rigid handle 365. The bottom of the long strip airbag 366 is connected to a connecting pipe, which passes through the rigid handle 365 and connects to the flexible air tube 364. The side of the top rod 35 has a concealed groove. When the long strip airbag 366 is upright, it enters the concealed groove so that the long strip airbag 366 does not protrude from the top rod 35. Air pump 367 is installed on the cold forging machine body 1; Pipe 368 is connected to air pump 367 and is connected to soft air pipe 364 through the inside of top material rod 35. Metering pump 369 is installed on the cold forging machine body 1. The lower end of metering pump 369 is connected to delivery pipe 368, and the upper end is connected to the outlet of a hopper containing lubricating fluid. The top of the elongated air bag 366 has several small openings. Under normal conditions, the hard handle 365 is kept upright under the action of a torsion spring, allowing the elongated air bag 366 to enter the concealed groove. At this time, the hard handle 365 squeezes the soft air tube 364, flattening it. After the forging begins to move and there is space between the forging and the lower die, the air pump 369 is started. 7. Begin inflation. Compressed air is continuously supplied into the flexible air tube 364 through the supply pipe 368, gradually inflating the flexible air tube 364 and allowing it to expand and then gradually return to its original position. The expansion of the flexible air tube 364 compresses the rigid handle 365 forward, causing it to swing forward around the torsion spring. This causes the long strip air bag 366 to also swing forward, tilting into a tilted position. Align the long strip air bag 366 with the bottom edge of the forging. Compressed gas continuously enters the long strip air bag 366 through the connecting pipe between the flexible air tube 364 and the long strip air bag 366. Finally, the lubricant is ejected from several small outlets at the top of the elongated airbag 366. Simultaneously, the metering pump 369 is activated, quantitatively delivering the lubricant from the hopper into the delivery pipe 368. Once inside the delivery pipe 368, the lubricant is carried by the pressurized compressed airflow, sequentially entering the flexible air pipe 364 and the elongated airbag 366. Finally, it is ejected from the small outlets at the top of the elongated airbag 366 by the airflow, thus applying the lubricant between the forging and the lower die. Alternatively, the force of the air pump 367 can be increased to... The airbag 366 continuously inflates and deforms, allowing it to squeeze between the forging and the lower die to a certain extent. This directly discharges lubricant between the forging and the lower die, effectively promoting the demolding of the forging and greatly reducing the difficulty of ejection, thus improving efficiency. At the same time, it avoids excessive friction that could damage the forging, ensuring safe ejection. Additionally, the airflow ejected from the airbag 366 can cool the die and the forging, thereby shortening the interval between two processing steps and reducing the subsequent cooling waiting time required for the forging.

[0022] Optionally, the ring-shift structure 361 includes: Arc-shaped groove 3611 is embedded in the side of the top material rod 35, and movable top piece 362 is slidably installed on the top of arc-shaped groove 3611. The sliding vertical bar 3612 is slidably disposed within the arc-shaped groove 3611; Air pipes 3613, two air pipes 3613 are concealed inside the top material rod 35, and the two air pipes 3613 are connected to an external high-pressure air pump through the inside of the top material rod 35. Metal shaping flexible strips 3614: One end of each of the two metal shaping flexible strips 3614 is inserted into one of the two air tubes 3613, and the other end extends from both sides of the arc-shaped groove 3611 into the arc-shaped groove 3611, respectively connecting to the two sides of the sliding vertical strip 3612. The end of the metal shaping flexible strip 3614 inserted into the air tube 3613 is disc-shaped, and the end is slidably fitted into the air tube 3613. During the return stroke of several push rods 35 after the push material is completed, the long strip airbag 366 is kept in an oblique swinging posture, or the air pump 367 is strengthened. The air pressure causes the long strip airbag 366 to continuously inflate and undergo adaptive shape changes within the lower mold, adhering to the inner wall of the lower mold. The external high-pressure air pumps connected to the two air pipes 3613 are regularly and continuously activated. When one external high-pressure air pump is activated, the high-pressure airflow generated by it pushes the end of the metal shaping strip 3614 within the air pipe 3613. This causes the metal shaping strip 3614 to push the sliding vertical bar 3612 along the arc-shaped groove 3611. Simultaneously, the movable top plate 362 and the long strip airbag 3616... 66 also moves together. At this time, the metal shaping strip 3614 on the other side of the sliding vertical bar 3612 is pressed into the air pipe 3613 on that side. After the sliding vertical bar 3612 moves into place, another external high-pressure air pump is started to push the sliding vertical bar 3612 back. This is repeated, so that the two long strip airbags 366 sweep back and forth in the lower mold. The friction between the two long strip airbags 366 and the lower mold is used to clean the inside of the lower mold cavity, sweeping away residual foreign matter such as oxide scale and debris generated during the forging process. This eliminates the need for manual cleaning of the mold interior by blowing or other methods after the ejection process ends and before the next processing. As several ejector rods 35 gradually descend, residual foreign objects are continuously collected and swept downwards. After the ejector rods 35 reset, the internal cleaning of the mold is completed. This organically combines the ejection action with the mold cleaning function, achieving the removal of residual foreign objects in the lower mold cavity, restoring the cleanliness of the lower mold cavity, preventing residual foreign objects from being pressed into the surface of the forging or aggravating mold wear during the next forging, and ensuring the quality of the forging and the life of the mold.

[0023] Optionally, the metal shaping strip 3614 is attached to the inner wall of the arc groove 3611, that is, the metal shaping strip 3614 completely fills the space between the arc grooves 3611. The arc groove 3611 restricts the metal shaping strip 3614, preventing unnecessary deformation of the metal shaping strip 3614 and preventing it from not being able to advance smoothly. This ensures that the metal shaping strip 3614 moves along the arc groove 3611 to push the sliding vertical bar 3612, thus ensuring reliability.

[0024] Optionally, the surface of the long strip airbag 366 has rubber bumps. The dense rubber bumps effectively increase the friction between the long strip airbag 366 and the lower mold when the long strip airbag 366 swings and rubs against the inner wall of the lower mold. This effectively improves the strength and ability of the long strip airbag 366 to sweep away residual foreign objects, allowing the long strip airbag 366 to better clean the inside of the lower mold and improve the cleaning effect of removing residual foreign objects.

[0025] Optionally, the ejector device of the cold forging press also includes several hollow rings 8 respectively set on the top of several sleeves 34, and the several hollow rings 8 are flush with the worktable 2, and several suction ports 9 are opened on the several hollow rings 8. Several hollow rings 8 are connected to connecting pipes, which are connected to an external negative pressure suction device through the inside of the workbench 2. The residual foreign matter brushed off continuously falls onto the hollow rings 8. At this time, the external negative pressure suction device is activated, and negative pressure is generated at all the suction ports 9 through the connecting pipes, which sucks away all the residual foreign matter brushed off onto the hollow rings 8 and inside the lower mold. No further manual cleaning of the accumulated residual foreign matter is required, and the cleaning of the lower mold is completely completed.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A material ejector device for a cold forging press, characterized in that, include: The cold forging machine body (1) has a worktable (2) on it. The worktable (2) is used to set the lower die. The cold forging machine body (1) and the worktable (2) are equipped with a relay lifting part (3). The relay-type lifting part (3) can continuously lift upwards in a relay-speed manner to force the forging in the lower mold cavity to be ejected through the worktable (2); The relay-type lifting section (3) can push out the forgings in the lower mold cavity to different degrees with different lifting forces; The relay lifting section (3) can add a lubricating medium between the forging and the lower die to promote the demolding of the forging; The relay-type lifting part (3) brushes away residual foreign matter in the lower mold during the return stroke.

2. The ejector device for a cold forging press as described in claim 1, characterized in that, The relay-type lifting unit (3) includes: Screw jack (31), the screw jack (31) is installed inside the cold forging machine body (1) and located below the worktable (2); Hydraulic cylinders (32), two hydraulic cylinders (32) are respectively disposed on both sides of the screw jack (31); The top material beam (33) is connected to the output shaft of the two hydraulic cylinders (32), and the output end of the screw jack (31) is aligned upward with the middle of the top material beam (33). Slipper sleeves (34), a plurality of slipper sleeves (34) are disposed inside the worktable (2), and the two ends of the slipper sleeves (34) extend out of the worktable (2). A top material rod (35) is connected to the top material crossbeam (33), and the top material rod (35) is vertically upward and respectively attached to and passes through the several slip sleeves (34). Lubrication brush assembly (36): Two sets of lubrication brush assemblies (36) are respectively set on the two top rods (35) on the outer side, and the other part is evenly distributed on the cold forging machine body (1); When the screw jack (31) and the two hydraulic cylinders (32) are started respectively, the top beam (33) can be lifted upward so that the top rods (35) can be lifted straight up along the sleeves (34).

3. The ejector device for a cold forging press as described in claim 2, characterized in that, The cold forging machine body (1) is provided with two cylindrical bases (4), and the inner walls of the two cylindrical bases (4) are provided with annular inner liner (5). A metal platform plate (6) is slidably installed inside the annular inner liner (5). Several arc-shaped electromagnets (7) are embedded in the circumference of the annular inner liner (5), and the several arc-shaped electromagnets (7) are connected to an external power supply. Several of the arc-shaped electromagnets (7) are in contact with the side of the metal platform disk (6); The two hydraulic cylinders (32) are respectively mounted on the two metal platform discs (6).

4. The ejector device for a cold forging press as described in claim 3, characterized in that, The lubrication brush assembly (36) includes: A ring-moving structure (361) is embedded in the top rod (35); A movable top plate (362) is mounted on the ring-moving structure (361); A back pad (363) is fixedly mounted on the movable top piece (362) and located at the rear. A flexible air tube (364) is disposed on the movable top plate (362) and adjacent to the back pad (363). A rigid handle (365) is mounted on the movable top plate (362) by a torsion spring and is located in front of the back pad (363) and the soft air tube (364). The rigid handle (365) and the back pad (363) squeeze the soft air tube (364) in the middle. A long strip airbag (366) is vertically mounted on the rigid handle (365). The bottom of the long strip airbag (366) is connected to a connecting pipe, which passes through the rigid handle (365) and connects to the flexible air tube (364). A concealed groove is opened on the side of the top material rod (35). When the long strip airbag (366) is upright, it enters the concealed groove so that the long strip airbag (366) does not protrude from the top material rod (35). An air pump (367) is mounted on the cold forging machine body (1); The conveying pipe (368) is connected to the air pump (367), and the conveying pipe (368) is connected to the soft air pipe (364) through the inside of the top material rod (35); Metering pump (369) is installed on the cold forging machine body (1). The lower end of the metering pump (369) is connected to the conveying pipe (368), and the upper end is connected to the outlet of the hopper containing lubricating fluid. The top of the long strip air bag (366) has several small leaks.

5. The ejector device for a cold forging press as described in claim 4, characterized in that, The ring-shift structure (361) includes: An arc-shaped groove (3611) is embedded in the side of the top material rod (35), and the movable top piece (362) is slidably installed on the top of the arc-shaped groove (3611). A sliding vertical bar (3612) is slidably disposed within the arc-shaped groove (3611); Air pipes (3613), two air pipes (3613) are concealed inside the top material rod (35), and the two air pipes (3613) are connected to an external high-pressure air pump through the inside of the top material rod (35); Metal shaping strips (3614): One end of each of the two metal shaping strips (3614) is inserted into the two air tubes (3613), and the other end extends from both sides of the arc groove (3611) into the arc groove (3611) and is connected to the two sides of the sliding vertical strip (3612). The end of the metal shaping strip (3614) inserted into the air tube (3613) is in the shape of a disc, and the end is fitted and slidably installed in the air tube (3613).

6. The ejector device for a cold forging press as described in claim 5, characterized in that, The metal shaping strip (3614) is attached to the inner wall of the arc groove (3611).

7. The ejector device for a cold forging press as described in claim 6, characterized in that, The surface of the elongated airbag (366) has rubber bumps.

8. The ejector device for a cold forging press as described in claim 7, characterized in that, The cold forging press also includes a number of hollow rings (8) respectively set on the top of the several sleeves (34), and the several hollow rings (8) are flush with the worktable (2), and several suction ports (9) are opened on the several hollow rings (8). Each of the hollow rings (8) is connected to a connecting pipe, which is connected to an external negative pressure suction device through the inside of the workbench (2).

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