Large-tonnage powder metallurgy equipment
Through the design of the molded structure, the use of components such as the molded linkage and gear balls, the quantitative ejection of lubricating liquid and real-time removal of powder are achieved, which solves the mold wear and powder residue problems in large-tonnage powder metallurgy equipment, and improves production accuracy and equipment stability.
Patent Information
- Application Number
- CN202510688005.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2025-08-01
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Large-tonnage powder metallurgy equipment has problems with mold wear and metal powder residue, resulting in high maintenance costs and low production accuracy.
Using a molded structure, through the reciprocating movement of the molded linkage, combined with the gear ball, spray piston and suction air duct, the quantitative spraying of lubricant liquid and real-time removal of powder are achieved, ensuring the lubrication of the inner wall of the mold and the uniform feeding of the powder.
It reduces mold wear, improves production accuracy, and reduces equipment maintenance costs and shutdown and maintenance frequency.
Smart Images
Figure CN120394866A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of powder metallurgy, and specifically relates to a large-tonnage powder metallurgy equipment. Background Art
[0002] In the wave of the transformation of the manufacturing industry towards high-end and precision, traditional processing technologies face many bottlenecks when producing complex-structured and high-performance metal components. As an advanced near-net-shape forming process, powder metallurgy technology effectively solves problems such as the difficulty of preparing special materials and low material utilization rate by pressing and sintering metal or alloy powders into components of the required shape. However, the demand for large-size, high-density, and high-strength components such as superalloy turbine disks in the aerospace field, high-strength transmission gears in the automotive industry, and wear-resistant bearings in energy equipment is increasing continuously. Conventional powder metallurgy equipment can no longer meet the production requirements. Large-tonnage powder metallurgy equipment, with its powerful pressing ability, can make the powder fully densify under high pressure, greatly improving the performance of components. It has become the core equipment to break through technical bottlenecks, meet the needs of high-end manufacturing, and promote the development of the powder metallurgy industry towards high added value, occupying an increasingly important position in the modern industrial system.
[0003] During the operation of large-tonnage powder metallurgy equipment, there are multiple challenges hidden in the process of the upper punch, core rod, and lower punch cooperating to compact metal powder. When the core rod inserts into the female die cavity along with the pressing actions of the upper and lower punches, the metal powder in the cavity will generate intense friction due to extrusion. This high-frequency friction will not only accelerate the wear of the inner wall of the female die cavity but also cause irreversible damage to the surface of the core rod, resulting in a decrease in die accuracy. And the wear of the die will be directly reflected in the quality of the billet, causing problems such as dimensional deviation and excessive surface roughness in the subsequent produced parts. In addition, there are also hidden dangers in the metal powder filling process. When filling powder into the female die cavity through the metal powder funnel, it is inevitable that there will be powder remaining on the surface of the lower punch. These remaining metal powders will increase the friction force between the metal powder funnel, upper punch, and lower punch, not only aggravating the wear between components but also shortening the service life of the die and related components, significantly increasing the equipment maintenance cost and the frequency of shutdown for maintenance.
[0004] Therefore, a large-tonnage powder metallurgy equipment is proposed. Summary of the Invention
[0005] The purpose of the present invention is to provide a large-tonnage powder metallurgy equipment to solve the problems raised in the above background art.
[0006] To achieve the above purpose, the present invention provides the following technical solution: A large-tonnage powder metallurgy equipment, comprising: A machine table; A metal powder supply structure, which is connected to the right side of the upper surface of the machine table by bolts; A molding structure, which is installed on the left side of the upper table surface of the machine table by bolts; The molding structure includes a rail vehicle. A protruding block is connected to the upper surface of the rail vehicle by bolts. A material channel is opened above the inside of the protruding block. On the left and right sides of the material channel through the feeding port, gear balls are rotatably arranged inside the protruding block. The upper side of the gear ball meshes with a driven gear rotatably arranged inside the protruding block. The shaft end of the driven gear close to the material channel is fixed to a bevel gear set rotatably arranged inside the protruding block. Among them, the upper shaft end of the bevel gear set on the left side is fixed to a cam, and a spray piston is in sliding contact with the cam surface of the cam. The piston end of the spray piston is slidably inserted into the inside of the fog pressure liquid channel, and a hydraulic spring is pressed against the piston end of the spray piston. An atomizing nozzle mounting interface is installed at the front end port of the fog pressure liquid channel, and is connected with a spray head spraying obliquely downward in cooperation with the atomizing nozzle mounting interface. The upper end of the rotating shaft of the cam extends out of the protruding block and is fixed to a toothed belt wheel of a toothed belt wheel set, and is in transmission connection with a conveying screw rod rotatably arranged inside the material extraction air duct in cooperation with the toothed belt wheel set. At least two suction holes are opened through the front end of the material extraction air duct to the left and right sides of the feeding port of the material channel. An extraction fan is installed inside the material extraction air duct, and the impeller shaft end of the extraction fan is in transmission connection with the bevel gear set on the right side in cooperation with the toothed belt wheel set.
[0007] Preferably, the molding structure includes a molding main body, which is a large-tonnage hydraulic system of powder metallurgy equipment and is composed of components such as a guide frame and a large-tonnage hydraulic jack. Among them, the guide frame is connected to the left side of the upper surface of the machine table by bolts, the hydraulic jack is fixed to the upper surface of the guide frame by bolts, and the output end of the hydraulic jack is movably connected with a die punching assembly in cooperation with a die pressing linkage frame. The die pressing linkage frame and the die punching assembly are both slidably connected with the guide frame in cooperation with a sleeve arranged integrally. The die punching assembly includes parts such as an upper die punch, a lower die punch, a female die and a core rod.
[0008] Preferably, tooth grooves are provided on the upper surface of the lower die punch of the die punching assembly on both the left and right sides of the female die. A main control hydraulic piston is fixedly arranged on the rear side of the support arm in cooperation with the frame plate connected to the hydraulic jack of the die pressing linkage frame. The piston end of the main control hydraulic piston is slidably and sealingly inserted into the interior of the first hydraulic cylinder body. Under the up-and-down traction drive of the hydraulic jack, the main control hydraulic piston will press out and draw in the safety liquid stored inside the first hydraulic cylinder body. The first hydraulic cylinder body is fixedly arranged on the rear side of the frame plate on the die pressing main body guide frame. An interface communicating with the interior of the first hydraulic cylinder body is installed at the upper end of the first hydraulic cylinder body. The interface is fixedly communicated with the interface provided at the front end of the second hydraulic cylinder body through a pipeline. The second hydraulic cylinder body is bolted to the rear side of the upper surface of the machine table. A passive piston is slidably and sealingly arranged inside the second hydraulic cylinder body. The shaft rod of the passive piston passes through the second hydraulic cylinder body and is fixedly connected to the connecting seat at the bottom of the rail vehicle. A spring is fixedly arranged inside the second hydraulic cylinder body, and the rear end of the spring abuts against the piston end of the passive piston. Rail wheels are installed at the four corners of the bottom surface of the rail vehicle and reciprocate back and forth along the slide rail in cooperation with the rail wheels. The slide rail is fixedly arranged on the rear side of the upper surface of the machine table and is symmetrically distributed along the left and right sides of the second hydraulic cylinder body.
[0009] Preferably, a vibration assembly can be arranged inside the material channel to assist in feeding the internal metal powder. Micro-convex wear-resistant protective sheets are fixedly arranged at intervals on the front and rear sides of the through-feed port of the material channel on the lower surface of the protruding block.
[0010] Preferably, the gear rolling balls are arranged corresponding to the tooth grooves in the front and rear directions, and the gear rolling balls will engage and drive with the tooth grooves under the drive of the protruding block.
[0011] Preferably, a communicating lubricating liquid replenishing channel is opened in the protruding block along the path of the mist pressure channel, and a one-way valve opening towards the inside of the mist pressure channel is installed inside the channel.
[0012] Preferably, a pressure relief valve opening towards the mist spray head installation interface is installed at one end of the mist pressure channel close to the mist spray head installation interface, and a one-way valve is installed inside the mist pressure channel close to the spray piston position.
[0013] Preferably, the toothed belt pulley group is composed of two toothed belt pulleys and a toothed belt for driving the two toothed belt pulleys. The material extraction air duct is an L-shaped hole channel and is opened directly below the material channel inside the protruding block, and the upper end of the material extraction air duct is communicated with the material channel.
[0014] Preferably, one end of the suction hole has several suction ports penetrating downward through the protruding block, and the suction ports are evenly distributed on the left and right sides of the feeding port of the protruding block.
[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the setting of the molding structure, when the molding linkage frame moves up and down, the main control hydraulic piston reciprocates in the first hydraulic cylinder body. Through the pressing and suction of the safety liquid, the passive piston in the second hydraulic cylinder body is driven to drive the rail vehicle and the protruding block to move back and forth, so that the pressing action of the molding linkage frame is precisely synchronized with the back-and-forth movement of the protruding block. Without an additional power source, while simplifying the mechanical structure, it ensures seamless connection between auxiliary functions such as lubrication and powder cleaning and the pressing process; 2. Through the setting of the molding structure, when the protruding block moves forward, the gear ball engages with the lower die punch tooth groove, and the driven gear and bevel gear set drive the cam to rotate. The cam pushes the spray piston to reciprocate in the mist pressure liquid channel through the sliding contact between the cam surface and the spray piston, and cooperates with the one-way valve and pressure relief valve in the mist pressure liquid channel to realize the quantitative inhalation, pressurization and atomized spraying of the lubricating liquid, which is precisely aligned with the inner wall of the female mold cavity and the core rod; at the same time, the cam drives the conveying screw to rotate through the toothed belt pulley set, and the right bevel gear set drives the suction fan to blow backward, forming a negative pressure in the material suction air duct. The residual powder on the surface of the lower die punch is sucked in real time through the suction hole and discharged through the conveying screw, and the vibration assembly in the material duct assists in the uniform feeding of the metal powder. In this way, while reducing friction and wear and avoiding powder residue, it ensures the stability of the pressing process and the accuracy of the blank, and reduces the equipment maintenance cost and the shutdown and maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is the overall structure view of the present invention Figure 1 ; Figure 2 is the overall structure view of the present invention Figure 2 ; Figure 3 is the overall sectional view of the present invention; Figure 4 is the schematic diagram of the rail vehicle and the protruding block of the present invention; Figure 5 is the schematic diagram of the bottom of the protruding block of the present invention; Figure 6 is the sectional view of the rail vehicle, the protruding block and their connection structure of the present invention; Figure 7 is the disassembled view of the rail vehicle, the protruding block and their internal structures of the present invention; Figure 8 is the sectional view of the protruding block of the present invention; Figure 9 is the schematic diagram of the internal structure of the protruding block of the present invention; Figure 10 is of the present invention Figure 3 enlarged view at A in.
[0017] In the figure: 1. Machine table; 2. Metal powder supply structure; 3. Molding structure; 31. Molding main body; 32. Molding linkage frame; 321. Main control hydraulic piston; 322. First hydraulic cylinder body; 33. Molding punch assembly; 331. Tooth groove; 34. Slide rail; 35. Rail vehicle; 351. Passive piston; 352. Second hydraulic cylinder body; 36. Protruding block; 361. Gear rolling ball; 3611. Driven gear; 3612. Bevel gear set; 3613. Cam; 3614. Spray piston; 3615. Hydraulic spring; 3616. Tooth belt pulley set; 3617. Conveyor screw; 3618. Extraction fan; 36�. Material channel; 3621. Protective sheet; 363. Material extraction air duct; 3631. Suction hole; 364. Mist pressure liquid duct; 3641. Pressure relief valve; 3642. Atomizing nozzle installation interface. Detailed implementation manners
[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0019] Please refer to Figures 1 to 10 , the present invention provides a technical solution for a large-tonnage powder metallurgy equipment: A large-tonnage powder metallurgy equipment, comprising: A machine table 1, which is a fixed bottom structure and is internally provided with an electrical and control system, a safety and protection system, etc.; A metal powder supply structure 2, which is an automatic powder feeding structure of the powder metallurgy equipment and is connected to the right side of the upper surface of the machine table 1 by bolts; A molding structure 3, including a hydraulic system, an upper molding punch, a lower molding punch, a female mold, a core rod, a mold sleeve, etc., and is installed on the left side of the upper surface of the machine table 1 by bolts for pressing metal powder into a blank with a specific shape and size; Among them, the molding structure 3 includes a molding main body 31. The molding main body 31 is a large-tonnage hydraulic system of the powder metallurgy equipment, which is composed of components such as a guide frame and a large-tonnage hydraulic jack. Among them, the guide frame is connected to the left side of the upper surface of the machine table 1 by bolts, and the hydraulic jack is fixed to the upper surface of the guide frame by bolts. Moreover, the output end of the hydraulic jack is movably connected to the molding linkage frame 32 and the molding punch assembly 33 in cooperation. The molding linkage frame 32 and the molding punch assembly 33 are both slidably connected to the guide frame in cooperation with the integrally arranged bushings. The molding punch assembly 33 includes parts such as an upper molding punch, a lower molding punch, a female mold, and a core rod. Among them, on the upper surface of the lower die punch, tooth grooves 331 are provided on the left and right sides of the female die. On the rear side of the plate of the die pressing linkage frame 32 where it is connected to the hydraulic jack, a main control hydraulic piston 321 is fixedly arranged in cooperation with the support arm. The piston end of the main control hydraulic piston 321 is slidably and sealingly inserted into the interior of the first hydraulic cylinder body 322. And under the up and down traction drive of the hydraulic jack, the main control hydraulic piston 321 will press out and draw inwards the safety liquid stored inside the first hydraulic cylinder body 322. The first hydraulic cylinder body 322 is fixedly arranged on the rear side of the plate on the guide frame of the die pressing main body 31. And at the upper end of the first hydraulic cylinder body 322, an interface communicating with the interior of the first hydraulic cylinder body 322 is installed. And the interface is fixedly communicated with the interface arranged at the front end of the second hydraulic cylinder body 352 through a pipeline, so as to input and output the safety liquid inside the first hydraulic cylinder body 322 to the interior of the second hydraulic cylinder body 352. The second hydraulic cylinder body 352 is connected to the rear side of the upper surface of the machine table 1 by bolts. And a passive piston 351 is slidably and sealingly arranged inside the second hydraulic cylinder body 352. And the shaft rod of the passive piston 351 passes through the second hydraulic cylinder body 352 and is fixedly connected to the connecting seat at the bottom of the rail car 35. A spring is fixedly arranged inside the second hydraulic cylinder body 352. And the rear end of the spring presses against the piston end of the passive piston 351. Rail wheels are installed at the four corners of the bottom surface of the rail car 35. And they reciprocate back and forth along the slide rail 34 in cooperation with the rail wheels. The slide rail 34 is fixedly arranged on the rear side of the upper surface of the machine table 1 and is symmetrically distributed along the left and right of the second hydraulic cylinder body 352. A protruding block 36 is connected to the upper surface of the rail car 35 by bolts. The protruding block 36 is a right trapezoidal three-dimensional structure with a lower front and a higher rear. And inside the protruding block 36, a material channel 362 is parallelly opened along the inclined path of the inclined surface above. And the lower inclined end of the material channel 362 penetrates the protruding block 36 downward according to the size of the female die cavity. A vibration assembly can be arranged inside the material channel 362 to assist in feeding the internal metal powder. And on the lower surface of the protruding block 36, micro-convex wear-resistant protective sheets 3621 are fixedly arranged at intervals on the front and rear sides of the through-feed port of the material channel 362. Inside the protruding block 36, gear balls 361 are rotatably arranged on both the left and right sides of the through-feed port of the material channel 362. And the gear balls 361 are arranged corresponding to the tooth grooves 331 front and back. And the gear balls 361 will be meshed and driven with the tooth grooves 331 under the drive of the protruding block 36. The upper side of the gear ball 361 is meshed and driven with a driven gear 3611 rotatably arranged inside the protruding block 36. The driven gear 3611 is a ratchet structure. And it will rotate under force when the rail car 35 drives the protruding block 36 to move forward and will idle when the rail car 35 drives the protruding block 36 to move backward. The shaft end of the driven gear 3611 close to the material channel 362 is fixed to one of the bevel gears of a bevel gear set 3612 rotatably arranged inside the protruding block 36. The bevel gear set 3612 is composed of two bevel gears rotatably arranged inside the protruding block 36 and meshing with each other. Among them, the upper shaft end of one of the bevel gears of the bevel gear set 3612 located on the left is fixed to a cam 3613 also rotatably arranged inside the protruding block 36.Moreover, the rear side of the cam surface of the cam 3613 is always in sliding contact with a spray piston 3614. The piston end of the spray piston 3614 is slidably and sealingly inserted into the interior of the mist pressure liquid passage 364. A hydraulic spring 3615 is fixedly arranged at the piston end of the spray piston 3614, and the other end of the hydraulic spring 3615 is fixedly arranged on the inner wall of the mist pressure liquid passage 364. A lubricating liquid replenishing liquid passage communicating with each other is opened in the interior of the protruding block 36 along the path of the mist pressure liquid passage 364. A one-way valve opening towards the interior of the mist pressure liquid passage 364 is installed in the interior of the liquid passage. One end of the mist pressure liquid passage 364 extends through to the front end of the protruding block 36, and an atomizing nozzle installation interface 3642 is installed at the through port, and is connected with a spray head spraying obliquely downwards in cooperation with the atomizing nozzle installation interface 3642. A pressure relief valve 3641 opening towards the atomizing nozzle installation interface 3642 is installed at one end of the path of the mist pressure liquid passage 364 close to the atomizing nozzle installation interface 3642, and a one-way valve is installed in the interior of the mist pressure liquid passage 364 close to the position of the spray piston 3614.,
[0020] During operation, the large-tonnage hydraulic jack drives the die pressing linkage 32 to move up and down, driving the die punching assembly 33 to press. When the linkage moves, the main control hydraulic piston 321 reciprocates in the first hydraulic cylinder block 322. When moving upwards, the safety liquid is pressed out to the second hydraulic cylinder block 352, pushing the passive piston 351 to drive the rail vehicle 35 and the protruding block 36 to approach the die pressing structure 3; when moving downwards, the safety liquid flows back, and the passive piston 351 drives the rail vehicle 35 and the protruding block 36 to move away from the die pressing structure 3 under the action of the spring. When the protruding block 36 moves forward, the gear ball 361 meshes with the lower die punching tooth groove 331, driving the driven gear 3611 to drive the cam 3613 to rotate through the left-side bevel gear set 3612, pushing the spray piston 3614 to reciprocally extrude the lubricating liquid in the mist pressure liquid passage 364. When the pressure of the lubricating liquid reaches the threshold value of the pressure relief valve 3641, it is sprayed towards the female mold cavity through the spray head to lubricate parts such as the inner wall and the mandrel, reducing friction and wear.
[0021] To sum up, through the setting of the die pressing structure 3, by means of the reciprocating movement of the main control hydraulic piston 321 in the first hydraulic cylinder block 322 when the die pressing linkage 32 moves up and down, through the pressing out and suction of the safety liquid, the passive piston 351 in the second hydraulic cylinder block 352 is driven to drive the rail vehicle 35 and the protruding block 36 to move back and forth, enabling the pressing action of the die pressing linkage 32 to be precisely synchronized with the back-and-forth movement of the protruding block 36. Without an additional power source, while simplifying the mechanical structure, it ensures seamless connection between auxiliary functions such as lubrication and powder cleaning and the pressing process; Through the setting of the stamping structure 3, when the protruding block 36 moves forward, the gear rolling ball 361 meshes with the lower die punching tooth groove 331, and drives the cam 3613 to rotate through the driven gear 3611 and the bevel gear set 3612. The cam 3613 pushes the spray piston 3614 to reciprocate in the mist pressure liquid channel 364 through the sliding contact between the cam surface and the spray piston 3614, and cooperates with the one-way valve and the pressure relief valve 3641 in the mist pressure liquid channel 364 to realize the quantitative inhalation, pressurization and atomized ejection of the lubricating liquid, and accurately align the inner wall of the female mold cavity and the mandrel.
[0022] As an embodiment of the present invention, as Figures 3 to 9 shown, the upper end of the rotating shaft of the cam 3613 extends out of the protruding block 36 and is fixed to one of the toothed belt wheels of the toothed belt wheel set 3616, and is in transmission connection with the conveying screw 3617 rotatably arranged inside the material extraction air duct 363 through the toothed belt wheel set 3616. The toothed belt wheel set 3616 is composed of two toothed belt wheels and a toothed belt for driving the two toothed belt wheels. The material extraction air duct 363 is an L-shaped duct, and is opened directly below the material duct 362 inside the protruding block 36, and the upper end of the material extraction air duct 363 is communicated with the material duct 362. At least two suction holes 3631 are opened through the left and right sides of the feeding port of the material duct 362 at the front end of the material extraction air duct 363, and one end of each suction hole 3631 has several suction ports penetrating downward through the protruding block 36, and the suction ports are evenly distributed on the left and right sides of the feeding port of the protruding block 36. The suction of the metal powder by the suction holes 3631 will not affect the pressing and feeding of the metal powder. A suction fan 3618 that blows backward is installed on the path of the material extraction air duct 363, and the impeller shaft end of the suction fan 3618 is in transmission connection with one of the bevel gears of the toothed belt wheel set 3616 rotatably arranged inside the protruding block 36 and the bevel gear set 3612 on the right side, and the internal path of the material extraction air duct 363 is inclined backward and downward from the position of the suction fan 3618.
[0023] During operation, the cam 3613 drives the conveying screw 3617 to rotate through the toothed belt wheel set 3616, and the right bevel gear set 3612 drives the suction fan 3618 to blow backward, so that a negative pressure is formed in the material extraction air duct 363, and the residual metal powder in the lower die punch is inhaled through the suction holes 3631 and discharged by the conveying screw 3617, reducing friction and wear.
[0024] In summary, through the setting of the molding structure 3, the rotating cam 3613 drives the conveying screw 3617 to rotate through the toothed pulley set 3616, and the right bevel gear set 3612 drives the extraction fan 3618 to blow air backward, creating a negative pressure in the extraction air duct 363. The residual powder on the surface of the lower die punch is sucked in real time through the suction holes 3631 and discharged through the conveying screw 3617. The vibration assembly in the material duct 362 assists in evenly feeding the metal powder. In this way, while reducing friction and wear and avoiding powder residue, the stability of the pressing process and the precision of the blank are ensured, and the equipment maintenance cost and the shutdown and maintenance frequency are reduced.
[0025] Working principle: During operation, the large-tonnage hydraulic jack drives the molding linkage frame 32 to move up and down, driving the die punch assembly 33 (upper die punch, lower die punch, female die, mandrel, etc.) to perform the pressing action. During the up and down movement of the molding linkage frame 32, the main control hydraulic piston 321 reciprocates in the first hydraulic cylinder block 322. When the hydraulic jack pulls the molding linkage frame 32 upward, the main control hydraulic piston 321 presses out the safety liquid in the first hydraulic cylinder block 322, and the safety liquid is input into the second hydraulic cylinder block 352 through the pipeline, pushing the passive piston 351 to move forward, driving the rail car 35 to move forward along the slide rail 34, making the protruding block 36 approach the molding structure 3; when the hydraulic jack pulls the molding linkage frame 32 downward, the main control hydraulic piston 321 sucks in the safety liquid in the first hydraulic cylinder block 322, and the safety liquid in the second hydraulic cylinder block 352 flows back. Under the action of the spring, the passive piston 351 moves backward, driving the rail car 35 to move backward along the slide rail 34, making the protruding block 36 move away from the molding structure 3; During the forward movement of the protruding block (36) along with the rail vehicle (35), the gear rolling ball (361) meshes with the tooth groove (331) on the lower die punch for transmission. The rotation of the gear rolling ball (361) drives the rotation of the driven gear (3611). The driven gear (3611) is driven by the bevel gear set (3612). The left bevel gear set (3612) drives the cam (3613) to rotate. The surface of the cam (3613) is in sliding contact with the spray piston (3614), causing the spray piston (3614) to reciprocate within the mist pressure liquid channel (364). The hydraulic spring (3615) serves as a buffer and for resetting. When the spray piston (3614) moves forward, it squeezes the lubricating liquid within the mist pressure liquid channel (364), forcing the one-way valve within the mist pressure liquid channel (364) to open. Then, the lubricating liquid flows through the one-way valve towards the atomizing nozzle installation interface (3642) and temporarily stays between the one-way valve and the pressure relief valve (3641). As the spray piston (3614) reciprocates within the mist pressure liquid channel (364), it cooperates with the liquid path with one-way input to continuously draw in the lubricating liquid and continuously push the lubricating liquid into the space between the one-way valve and the pressure relief valve (3641) inside the mist pressure liquid channel (364). As the lubricating liquid accumulates between the one-way valve and the pressure relief valve (3641), the pressure of the lubricating liquid will reach the pressure relief pressure of the pressure relief valve (3641). Then, the lubricating liquid is sprayed obliquely downward through the spray head connected to the atomizing nozzle installation interface (3642). At this time, the front end of the protruding block (36) just moves to the position of the female die, and the spray head is facing the female die cavity. In this way, the inner wall of the female die cavity, the core rod and other parts can be lubricated to reduce friction and wear. At the same time, the cam (3613) drives the conveying screw (3617) to rotate through the toothed belt pulley set (3616). The right bevel gear set (3612) drives the suction fan (3618) to rotate. The suction fan (3618) blows air backward, creating a negative pressure within the material suction air duct (363). The residual metal powder on the surface of the lower die punch is sucked into the material suction air duct (363) through the suction holes (3631) and discharged through the conveying screw (3617), avoiding the increase in friction caused by the residual powder and the aggravation of component wear. The vibration component within the material duct (362) assists in feeding the metal powder to ensure uniform powder filling. Through the collaborative work of the above components, the high-efficiency pressing of metal powder by large-tonnage powder metallurgy equipment is achieved, and at the same time, problems such as die wear and powder residue are solved; During the backward movement of the protruding block (36) along with the rail vehicle (35), the gear rolling ball (361) meshes and rotates in reverse with the tooth groove (331) on the lower die punch. The rotation of the gear rolling ball (361) will drive the driven gear (3611) to rotate idly. The idling driven gear (3611) will not drive the cam (3613), the suction fan (3618) and the conveying screw (3617) to rotate through the bevel gear set (3612); The above process will be continuously executed during the powder metallurgy process.
[0026] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A large-tonnage powder metallurgy equipment, comprising: A machine table (1); A metal powder supply structure (2), bolted to the right side of the upper surface of the machine table (1); A molding structure (3), bolted to the left side of the upper surface of the machine table (1), characterized in that: The molding structure (3) includes a rail car (35), the upper surface of the rail car (35) is bolted with a protruding block (36), a material channel (362) is opened above the inside of the protruding block (36), and on both the left and right sides of the material channel (362) penetrating the feeding port inside the protruding block (36), gear balls (361) are rotatably arranged. The upper side of the gear ball (361) is engaged with a driven gear (3611) rotatably arranged inside the protruding block (36). The shaft end of the driven gear (3611) close to the material channel (362) is fixed to a bevel gear set (3612) rotatably arranged inside the protruding block (36). Among them, the upper shaft end of the bevel gear set (3612) on the left side is fixed to a cam (3613), and a spray piston (3614) is in sliding contact with the cam surface of the cam (3613). The piston end of the spray piston (3614) is slidably inserted into the inside of the mist pressure liquid channel (364), and a hydraulic spring (3615) is pressed against the piston end of the spray piston (3614). An atomizing nozzle installation interface (3642) is installed at the front end port of the mist pressure liquid channel (364), and is connected with an atomizing nozzle spraying obliquely downward in cooperation with the atomizing nozzle installation interface (3642). The upper end of the rotating shaft of the cam (3613) extends out of the protruding block (36) and is fixed to a toothed belt wheel of a toothed belt wheel set (3616), and is in transmission connection with a conveying screw (3617) rotatably arranged inside a material extraction air duct (363) in cooperation with the toothed belt wheel set (3616). At least two suction holes (3631) are opened through the front end of the material extraction air duct (363) to the left and right sides of the feeding port of the material channel (362). An extraction fan (3618) is installed inside the material extraction air duct (363), and the impeller shaft end of the extraction fan (3618) is in transmission connection with the bevel gear set (3612) on the right side in cooperation with the toothed belt wheel set (3616).
2. The large-tonnage powder metallurgy equipment according to claim 1, characterized in that: The molding structure (3) includes a molding main body (31), the molding main body (31) is a large-tonnage hydraulic system of the powder metallurgy equipment, which is composed of components such as a guide frame and a large-tonnage hydraulic jack. Among them, the guide frame is bolted to the left side of the upper surface of the machine table (1), the hydraulic jack is bolted to the upper surface of the guide frame, and the output end of the hydraulic jack is movably connected with a die punching assembly (33) in cooperation with a molding linkage frame (32). The molding linkage frame (32) and the die punching assembly (33) are both slidably connected with the guide frame through an integrally arranged bushing. The die punching assembly (33) includes parts such as an upper die punch, a lower die punch, a female die, and a core rod.
3. A large-tonnage powder metallurgy equipment according to claim 2, characterized in that: On the upper surface of the lower punch of the die punching assembly (33), tooth grooves (331) are provided on the left and right sides of the female die. On the rear side of the support arm of the pressing linkage frame (32) in cooperation with the hydraulic jack, a main control hydraulic piston (321) is fixedly arranged. The piston end of the main control hydraulic piston (321) is slidably and sealingly inserted into the interior of the first hydraulic cylinder body (322). And under the up and down traction drive of the hydraulic jack, the main control hydraulic piston (321) will press out and draw in the safety liquid stored inside the first hydraulic cylinder body (322). The first hydraulic cylinder body (322) is fixedly arranged on the rear side of the support plate on the guiding frame of the pressing main body (31). And at the upper end of the first hydraulic cylinder body (322), an interface communicating with the interior of the first hydraulic cylinder body (322) is installed. And the interface is fixedly communicated with the interface arranged at the front end of the second hydraulic cylinder body (352) through a pipeline. The second hydraulic cylinder body (352) is connected to the rear side of the upper surface of the machine table (1) by bolts. And a passive piston (351) is slidably and sealingly arranged inside the second hydraulic cylinder body (352). And the shaft rod of the passive piston (351) passes through the second hydraulic cylinder body (352) and is fixedly connected to the connecting seat at the bottom of the rail car (35). A spring is fixedly arranged inside the second hydraulic cylinder body (352). And the rear end of the spring abuts against the piston end of the passive piston (351). At the four corners of the bottom surface of the rail car (35), rail wheels are installed. And the rail car moves back and forth along the rail (34) in cooperation with the rail wheels. The rail (34) is fixedly arranged on the rear side of the upper surface of the machine table (1) and is symmetrically distributed along the left and right sides of the second hydraulic cylinder body (352).
4. A large-tonnage powder metallurgy equipment according to claim 1, characterized in that: Inside the material channel (362), a vibration assembly can be arranged to assist in feeding the internal metal powder. And on the lower surface of the protruding block (36), protective sheets (3621) are fixedly arranged at intervals on the front and rear sides of the through feeding port of the material channel (362).
5. A large-tonnage powder metallurgy equipment according to claim 1, characterized in that: The gear rolling ball (361) is arranged corresponding to the tooth groove (331) in the front and rear. And the gear rolling ball (361) will engage and drive with the tooth groove (331) under the drive of the protruding block (36).
6. A large-tonnage powder metallurgy device according to claim 1, characterized in that: Inside the protruding block (36), a lubricating liquid replenishing liquid channel communicating with the mist pressure liquid channel (364) is opened on the path of the mist pressure liquid channel. And a one-way valve opening towards the inside of the mist pressure liquid channel (364) is installed inside the liquid channel.
7. A large-tonnage powder metallurgy device according to claim 1, characterized in that: On the path of the mist pressure liquid channel (364), a pressure relief valve (3641) opening towards the mist spraying nozzle installation interface (3642) is installed at one end close to the mist spraying nozzle installation interface (3642). And a one-way valve is installed inside the mist pressure liquid channel (364) close to the spraying piston (3614).
8. A large-tonnage powder metallurgy equipment according to claim 1, characterized in that: The toothed belt wheel set (3616) is composed of two toothed belt wheels and a toothed belt for driving the two toothed belt wheels. The material suction air duct (363) is an L-shaped hole channel and is opened directly below the material channel (362) inside the protruding block (36). And the upper end of the material suction air duct (363) is communicated with the material channel (362).
9. A large-tonnage powder metallurgy equipment according to claim 1, characterized in that: One end of the suction hole (3631) is provided with a plurality of suction ports that penetrate downward through the protruding block (36), and the suction ports are evenly distributed on the left and right sides of the feeding port of the protruding block (36).