Pressing forming equipment for hard alloy machining through powder metallurgy method

Abstract

The invention discloses pressing forming equipment for hard alloy machining through a powder metallurgy method, and relates to the technical field of hard alloy machining through a powder metallurgy method. The device comprises an operation table, a protective cover is fixed to the top face of the operation table, and an anti-blocking device is arranged on the top face of the operation table; the anti-blocking device comprises a lifting air cylinder, an upper mold, a telescopic assembly rod, an inner hollow block, a lower pressing strip and an obtuse angle block. Through the arrangement of the anti-blocking device, the lifting air cylinder, the upper mold, the telescopic assembly rod, the inner hollow block, the lower pressing strip and the obtuse angle block are matched, when the telescopic assembly rod reaches the highest point, the upper mold continues to move upwards, the telescopic assembly rod pops up, and the telescopic assembly rod pushes the inner hollow block to move along the bottom edge of the obtuse angle block; the scraping plate in the inner hollow block loses the pressing of the lower pressing strip and pops up, the scraping plate moves along with the inner hollow block and scrapes the bottom surface of the upper mold, the purpose of cleaning condensed powder blocks on the bottom surface of the mold is achieved, and the phenomenon that the powder blocks sink on the surface of raw materials and consequently pressing fails is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of hard alloy processing by powder metallurgy method, and specifically relates to a pressing and forming device for hard alloy processing by powder metallurgy method. Background Technique

[0002] The pressing and forming device for hard alloy processing by powder metallurgy method is a device that forms alloy products by pressing or injecting alloy powder into a mold. Its raw materials are all pulverized and atomized to obtain hard alloy powder with the required particle size and shape, and it is a common tool for making hard alloys.

[0003] The patent with the patent announcement number CN212121652U discloses a pressing and forming device for hard alloy processing by powder metallurgy method, including a working platform. The bottom outer surface of the working platform is welded with a chassis seat, the top outer surface of the working platform is welded with a vertical plate, and a vertical frame is welded on the top outer surface of the working platform and close to one side of the vertical central axis of the vertical plate. A driving motor is bolted to the top outer surface of the vertical frame, and one end of the driving motor located inside the vertical frame is fixedly connected with a support plate, and an upper mold is fixedly connected to the outer surface of the support plate away from the inner top wall of the vertical frame. The pressing and forming device for hard alloy processing by powder metallurgy method described in this patent automatically completes scraping the material when the lower mold moves. The surface of the powder is relatively flat before pressing, which ensures the quality of the finished blank. In addition, there is no need for manual feeding and discharging, and it is transported by a conveying device, which improves the efficiency of pressing and forming and brings a better application prospect.

[0004] At present, the pressing and forming devices for hard alloy processing by powder metallurgy method on the market still have the following problems: during the long-term pressing and forming process, there may be residual hard lumps adhering to the contact surface between the pressing block and the powder, which will cause notches and depressions in the subsequent pressed products, resulting in damage to the products and reducing the qualified rate. Therefore, it is necessary to design a pressing and forming device for hard alloy processing by powder metallurgy method that can clean the contact surface of the pressing block. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a pressing and forming device for hard alloy processing by powder metallurgy method, which solves the problem that during the long-term pressing and forming process, there may be residual hard lumps adhering to the contact surface between the pressing block and the powder, which will cause notches and depressions in the subsequent pressed products, resulting in damage to the products and reducing the qualified rate, as mentioned in the above background technique.

[0006] To achieve the above object, the present invention is realized by the following technical solutions: A powder metallurgy method for a pressing and forming device for hard alloy processing, including an operating table, on the top surface of which a protective cover is fixed. On the top surface of the operating table, an anti-caking device, a leveling device, a discharging device and a positioning device are provided; The anti-caking device includes a lifting cylinder, an upper mold, a telescopic group rod, a hollow block, a lower pressing strip and an obtuse block. The lifting cylinder is fixed on the top surface of the inner wall of the protective cover, and the upper mold is fixed at the telescopic end of the lifting cylinder. The telescopic group rod is slidably installed on both sides of the inner wall of the protective cover, and a spring is provided between the telescopic group rod and the inner wall of the protective cover. The hollow block is fixed at the telescopic end of the telescopic group rod. A scraper is slidably installed on the top surface of the inner wall of the hollow block, and a spring is provided between the scraper and the inner wall of the hollow block. The lower pressing strip is fixed on the top surface of the upper mold, and the hollow block is located on the movement track of the lower pressing strip. The obtuse block is fixed on the back of the upper mold, and the hollow block is located on the movement track of the obtuse block. Start the lifting cylinder, the lifting cylinder drives the upper mold to move downward, the upper mold drives the lower pressing strip to move downward, the lower pressing strip drives the hollow block to move downward, and the hollow block drives the telescopic group rod to move downward. After the pressing is completed, the lifting cylinder drives the upper mold to move upward. Under the action of the spring force, the telescopic group rod rebounds upward, and the telescopic group rod drives the hollow block to rebound upward. When the telescopic group rod reaches the highest point, the upper mold continues to move upward. At this time, the telescopic group rod pops out, and the telescopic group rod pushes the hollow block to move along the bottom edge of the obtuse block. The scraper inside the hollow block pops out due to the loss of the pressing of the lower pressing strip. The scraper follows the hollow block to move and scrapes the bottom surface of the upper mold, achieving the purpose of cleaning the condensed powder blocks on the bottom surface of the mold, avoiding depressions on the surface of the raw materials caused by the powder blocks during the next pressing, and resulting in pressing failure. When pressing again, the upper mold drives the obtuse block to move downward, and the obtuse block squeezes open the hollow block, causing the hollow block to move to both sides and reset to both ends of the upper mold, so as to perform the next operation.

[0007] According to the above technical solution, the anti-caking device further includes a pressing block, a telescopic ring and a hollow plate. The pressing block is fixed on the bottom surface of the upper mold, the telescopic ring is fixed on the bottom surface of the upper mold, the hollow plate is fixed at the telescopic end of the telescopic ring, and exhaust holes are provided on the side surface of the telescopic end of the telescopic ring. When the upper mold moves downward, it will drive air flow, and these air flows are likely to cause the metal powder raw materials to be blown away. Therefore, the hollow plate and the exhaust holes provided on the side surface of the telescopic end of the telescopic ring are used to guide the downward air flow, so that the downward air flow is discharged from the bottom surface of the hollow plate to the exhaust holes on the side surface. The pressing block moves downward. When the hollow plate contacts the raw materials, the pressing block continues to press down, causing the telescopic ring to contract. The pressing block fills the hollow part of the hollow plate, making the bottom surface of the entire upper mold smooth and flat. In this way, the stability of the powder raw materials during downward pressing can be maintained, achieving the purpose of avoiding the blowing away of metal powder.

[0008] According to the above technical solution, the leveling device includes a first screw, a moving block, a lower mold, a telescopic connecting rod, a collection box, a spring-back rod, and a leveling plate. The first screw is fixed to the output end of the motor, and the motor is fixed to the left side of the operating table. The moving block is threadedly connected to the outer wall of the first screw. The top of the moving block penetrates and is slidably installed on the top surface of the operating table. The lower mold is clamped to the top of the moving block. One end of the telescopic connecting rod is fixed to both sides of the top of the moving block, and the collection box is fixed to the other end of the telescopic connecting rod. The spring-back rod is fixed to both sides of the inner wall of the protective cover, and the leveling plate is fixed to the telescopic end of the spring-back rod. Start the motor, the motor drives the first screw to rotate, the first screw drives the moving block to move backward, the moving block drives the lower mold to move to the pressing point. Before the lower mold reaches the pressing point, it will pass through the bottom of the spring-back rod and the leveling plate. The contact surface between the highest points of the leveling plate and the lower mold is automatically adjusted by the spring-back rod and the leveling plate. The excess powder on the lower mold is scraped and cleaned by the leveling plate, making the powder surface flat, improving the quality of the pressed alloy finished product. At the same time, the moving block drives the telescopic connecting rod to move backward, and the telescopic connecting rod drives the collection box to move backward. The collection box is used to collect and store the scraped powder, avoiding material waste and keeping the inside of the machine clean.

[0009] According to the above technical solution, the leveling device further includes a toothed plate, a convex block, a second screw, a gear, and a pushing plate. The toothed plate is fixed to the right side of the telescopic connecting rod, the convex block is fixed to the top surface of the leveling plate, the left end of the second screw is rotatably installed on the right side of the convex block, the gear is fixed to the right end of the second screw, the gear is located on the movement track of the toothed plate, and the pushing plate is threadedly connected to the outer wall of the second screw. The pushing plate is slidably installed on the top surface of the leveling plate. When the telescopic connecting rod moves backward, the telescopic connecting rod drives the toothed plate to move backward, the toothed plate drives the gear to rotate, the gear drives the second screw to rotate, and the second screw drives the pushing plate to move. The powder in the collection box is leveled and sorted by the pushing plate, avoiding the powder from accumulating in the middle of the collection box, resulting in limited loading capacity of the collection box, improving the loading capacity of the collection box, and reducing the frequency of manual cleaning.

[0010] According to the above technical solution, the unloading device includes an elastic square block, a round rod, a sliding template, and a trapezoidal block. The sliding template is slidably installed inside the lower mold. The round rod is fixed to both sides of the sliding template. Square through grooves for the movement of the round rod are provided on both sides of the lower mold. The trapezoidal block is fixed to the top surface of the operating table, and the trapezoidal block is located on the movement track of the round rod. The elastic square block is fixed to both sides of the lower mold, and the round rod is located on the movement track of the elastic square block. When the lower mold moves backward after pressing, the lower mold drives the sliding template to move backward, the sliding template drives the round rod to move backward. During the movement of the round rod, it will pass through and squeeze the trapezoidal block. The trapezoidal block squeezes the round rod to move upward, the elastic square block contracts, and the round rod drives the sliding template to move upward. Using the misalignment between the sliding template and the lower mold, the finished product after pressing is automatically demolded, reducing the workload of the staff and greatly improving the production efficiency.

[0011] According to the above technical solution, the discharging device further includes a semi-circular block, a connecting plate and a knocking column. The semi-circular block is fixed on the top surface of the trapezoidal block. The semi-circular block is located on the movement track of the round rod. The connecting plate is fixed on the outer side of the trapezoidal block through a spring. The connecting plate is located on the movement track of the round rod. The knocking column is fixed on the side of the connecting plate close to the trapezoidal block. The knocking column penetrates through the side surface of the trapezoidal block. The lower die is located on the movement track of the knocking column. When the round rod slides over the top surface of the trapezoidal block, the round rod will squeeze and collide with the semi-circular block. Coupled with the downward pressure of the elastic square block, the round rod will move up and down continuously. The round rod drives the sliding template to move up and down continuously. By using the vibration of the sliding template, the demoulding efficiency is improved, and the damage during the demoulding of the finished product can also be reduced. At the same time, the round rod squeezes the top of the connecting plate, the connecting plate moves away from the trapezoidal block, and the connecting plate drives the knocking column to move away from the trapezoidal block. When the round rod falls into the groove at the top of the connecting plate, under the action of the spring force, the connecting plate rebounds towards the trapezoidal block, and the connecting plate drives the knocking column to rebound towards the trapezoidal block. The knocking column impacts the side surface of the lower die, so as to achieve the purpose of vibrating the lower die, making the demoulding smoother and further increasing the demoulding success rate.

[0012] According to the above technical solution, the positioning device includes a limiting plate, a telescopic square column, a damping rod and a baffle. The telescopic square column is fixed on the top surface of the inner wall of the protective cover. The limiting plate is fixed at the telescopic end of the telescopic square column. The top end of the limiting plate is located on the movement track of the upper die. The damping rod is fixed at the bottom of the limiting plate. The baffle is fixed at the front end of the damping rod. The baffle is located on the movement track of the lower die. When the lower die reaches the pressing point, in order to ensure that the upper die and the lower die can be aligned, the lower die is limited by the limiting plate to achieve the purpose of positioning, making the pressing more accurate. When the pressing is over and the upper die moves upward, the upper die drives the limiting plate to move upward, and the telescopic square column contracts, so that interlocking unlocking can be carried out to achieve the positioning and release of the lower die. At the same time, when the lower die collides with the limiting plate, since the lower die is loaded with metal powder, it is easy for the powder to fly out due to the impact, resulting in the lack of pressing material. Therefore, the baffle is used to contact the lower die first. The lower die pushes the baffle, and the baffle squeezes the damping rod. The damping rod is used to buffer and decelerate the lower die to achieve the purpose of preventing the metal powder in the lower die from flying, improving the yield of the pressed product and avoiding the waste of materials.

[0013] According to the above technical solution, the positioning device further includes a fastener, an elastic column and a chamfered block. The fastener is fixed on both sides of the limit plate, the elastic column is fixed on both sides of the lower mold, the chamfered block is fixed at the top of the elastic column, and the fastener is located on the movement track of the chamfered block. When the lower mold moves backward and approaches the limit plate, the lower mold drives the elastic column to move backward, the elastic column drives the chamfered block to move backward, the chamfered block collides with the front end of the fastener, the chamfered block is squeezed and moves downward, the chamfered block drives the elastic column to contract. When the front end of the fastener reaches the front end of the chamfered block, the elastic column pops out, and the chamfered block is stuck into the bottom of the fastener, so as to achieve the purpose of fixing the relative positions of the lower mold and the limit plate, making the positioning more accurate, and also avoiding misoperation and movement of the lower mold during the pressing process. When the limit plate moves upward, the limit plate drives the fastener to move upward, so that it can be unfastened automatically, making the device more convenient and automated to use.

[0014] The present invention provides a powder metallurgy method for a pressing and forming device used in the processing of cemented carbide. It has the following beneficial effects: (1) Through the setting of the anti-caking device in the present invention, the lifting cylinder, the upper mold, the telescopic group rod, the hollow block, the lower pressing strip and the obtuse angle block cooperate. When the telescopic group rod reaches the highest point, the upper mold continues to move upward. At this time, the telescopic group rod pops out, and the telescopic group rod pushes the hollow block to move along the bottom edge of the obtuse angle block. The scraper inside the hollow block pops out without the pressing of the lower pressing strip. The scraper follows the hollow block to move and scrapes the bottom surface of the upper mold, achieving the purpose of cleaning the condensed powder block on the bottom surface of the mold, and avoiding that in the next pressing, the powder block causes a depression on the surface of the raw material, resulting in the failure of pressing. The pressing block, the telescopic ring and the hollow plate cooperate. By using the exhaust holes opened on the side surfaces of the telescopic ends of the hollow plate and the telescopic ring to guide the downward pressing air flow, the downward pressing air flow is discharged from the bottom surface of the hollow plate to the side exhaust holes. The pressing block moves downward. When the hollow plate touches the raw material, the pressing block continues to press down, causing the telescopic ring to contract. The pressing block fills the hollow part of the hollow plate, making the bottom surface of the entire upper mold smooth and flat. In this way, the stability of the powder raw material during downward pressing can be maintained, achieving the purpose of avoiding the blowing away of the metal powder.

[0015] (2) Through the setting of the leveling device in the present invention, the first screw, the moving block, the lower mold, the telescopic connecting rod, the collecting box, the spring-back rod and the leveling plate cooperate. By using the spring-back rod and the leveling plate, the contact surface between the leveling plate and the highest point of the lower mold is automatically adjusted. The leveling plate is used to scrape and clean the excess powder on the lower mold, making the powder surface flat, improving the quality of the pressed alloy finished product. At the same time, the moving block drives the telescopic connecting rod to move backward, and the telescopic connecting rod drives the collecting box to move backward. The collecting box is used to collect and store the scraped powder, avoiding material waste and keeping the inside of the machine clean. The toothed plate, the convex block, the second screw, the gear and the push plate cooperate. The toothed plate drives the gear to rotate, the gear drives the second screw to rotate, and the second screw drives the push plate to move. The push plate is used to level and sort the powder in the collecting box, avoiding the limited loading capacity of the collecting box caused by the powder accumulation in the middle of the collecting box, improving the loading capacity of the collecting box and reducing the frequency of manual cleaning.

[0016] (3) Through the setting of the unloading device in the present invention, the elastic square block, the round rod, the sliding template and the trapezoidal block cooperate. When the round rod moves, it will pass through and squeeze the trapezoidal block. The trapezoidal block is squeezed to make the round rod move upward, the elastic square block shrinks, and the round rod drives the sliding template to move upward. By using the dislocation between the sliding template and the lower mold, the finished product after pressing and forming is automatically demolded, reducing the workload of the staff and greatly improving the production efficiency. The semi-circular block, the connecting plate and the knocking column cooperate. When the round rod slides over the top surface of the trapezoidal block, the round rod will squeeze and collide with the semi-circular block. Combined with the downward pressure of the elastic square block, the round rod drives the sliding template to move up and down continuously. By using the jitter of the sliding template, the demolding efficiency is improved, and the damage during the demolding of the finished product can also be reduced. The round rod squeezes the top of the connecting plate, and the connecting plate drives the knocking column away from the trapezoidal block. When the round rod falls into the groove at the top of the connecting plate, under the action of the spring force, the connecting plate rebounds towards the trapezoidal block, and the connecting plate drives the knocking column to rebound towards the trapezoidal block. The knocking column impacts the side of the lower mold, so as to achieve the purpose of vibrating the lower mold and making the demolding smoother, further increasing the success rate of demolding.

[0017] (4) Through the setting of the positioning device, the limiting plate, telescopic square column, damping rod and baffle cooperate. The limiting plate is used to limit the lower die, achieving the purpose of positioning and making the pressing more accurate. At the same time, when the lower die collides with the limiting plate, since the lower die is filled with metal powder, the powder is likely to fly out due to the impact, resulting in the lack of pressing material. Therefore, the baffle contacts the lower die first. The lower die pushes the baffle, and the baffle squeezes the damping rod. The damping rod is used to buffer and decelerate the lower die, achieving the purpose of preventing the metal powder in the lower die from flying, improving the yield rate of pressing and avoiding material waste. The fastener, elastic column and chamfering block cooperate. When the front end of the fastener reaches the front end of the chamfering block, the elastic column pops out, and the chamfering block is stuck into the bottom of the fastener, thereby achieving the purpose of fixing the relative position of the lower die and the limiting plate, making the positioning more accurate and also avoiding misoperation and movement of the lower die during the pressing process. When the limiting plate moves upward, the limiting plate drives the fastener to move upward, so that it can be automatically unfastened, making the device more convenient and automated to use. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the whole of the present invention; Figure 2 is an internal schematic diagram of the whole of the present invention; Figure 3 is a schematic diagram of the anti-caking device of the present invention; Figure 4 is an enlarged schematic diagram of part a of the anti-caking device of the present invention; Figure 5 is a schematic diagram of the leveling device of the present invention; Figure 6 is a schematic diagram of the unloading device of the present invention; Figure 7 is an enlarged schematic diagram of part b of the unloading device of the present invention; Figure 8 is a schematic diagram of the positioning device of the present invention; Figure 9 is an enlarged schematic diagram of part c of the positioning device of the present invention.

[0019] In the figure: 11, operating platform; 12, protective cover; 2, anti-caking device; 3, leveling device; 4, discharging device; 5, positioning device; 21, lifting cylinder; 22, upper die; 23, telescopic group rod; 24, hollow block; 25, lower pressing strip; 26, obtuse angle block; 27, pressing block; 28, telescopic ring; 29, hollow plate; 31, screw rod 1; 32, moving block; 33, lower die; 34, telescopic connecting rod; 35, collection box; 36, rebounding rod; 37, leveling plate; 38, toothed plate; 39, convex block; 310, screw rod 2; 311, gear; 312, pushing plate; 41, elastic square block; 42, round rod; 43, sliding template; 44, trapezoidal block; 45, semi-circular block; 46, connecting plate; 47, knocking column; 51, limiting plate; 52, telescopic square column; 53, damping rod; 54, baffle plate; 55, fastener; 56, elastic column; 57, chamfered block. Specific implementation manner

[0020] 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.

[0021] Please refer to Figures 1-9, an embodiment of the present invention is: a powder metallurgy method for a pressing and forming device for processing cemented carbide, including an operating table 11, a protective cover 12 is fixed on the top surface of the operating table 11, and an anti-caking device 2, a leveling device 3, a discharging device 4 and a positioning device 5 are arranged on the top surface of the operating table 11; the anti-caking device 2 includes a lifting cylinder 21, an upper die 22, a telescopic group rod 23, a hollow block 24, a lower pressing strip 25 and an obtuse block 26. The lifting cylinder 21 is fixed on the top surface of the inner wall of the protective cover 12. When the lifting cylinder 21 is started, the upper die 22 is fixed on the telescopic end of the lifting cylinder 21. The lifting cylinder 21 drives the upper die 22 to move downward. The telescopic group rod 23 is slidably installed on both sides of the inner wall of the protective cover 12. A spring is arranged between the telescopic group rod 23 and the inner wall of the protective cover 12. The hollow block 24 is fixed on the telescopic end of the telescopic group rod 23. A scraper is slidably installed on the top surface of the inner wall of the hollow block 24. A spring is arranged between the scraper and the inner wall of the hollow block 24. The lower pressing strip 25 is fixed on the top surface of the upper die 22. The upper die 22 drives the lower pressing strip 25 to move downward. The hollow block 24 is located on the movement track of the lower pressing strip 25. The lower pressing strip 25 drives the hollow block 24 to move downward. The hollow block 24 drives the telescopic group rod 23 to move downward. The obtuse block 26 is fixed on the back of the upper die 22. The hollow block 24 is located on the movement track of the obtuse block 26. After the pressing is completed, the lifting cylinder 21 drives the upper die 22 to move upward. Under the action of the spring force, the telescopic group rod 23 rebounds upward. The telescopic group rod 23 drives the hollow block 24 to rebound upward. When the telescopic group rod 23 reaches the highest point, the upper die 22 continues to move upward. At this time, the telescopic group rod 23 pops out. The telescopic group rod 23 pushes the hollow block 24 to move along the bottom edge of the obtuse block 26. The scraper inside the hollow block 24 pops out without the pressing of the lower pressing strip 25. The scraper follows the hollow block 24 to move and scrapes the bottom surface of the upper die 22, achieving the purpose of cleaning the condensed powder blocks on the bottom surface of the die, avoiding the powder blocks causing depressions on the surface of the raw material during the next pressing, resulting in the failure of the pressing. When pressing again, the upper die 22 drives the obtuse block 26 to move downward. The obtuse block 26 squeezes open the hollow block 24, causing the hollow block 24 to move to both sides and reset to both ends of the upper die 22, so as to perform the next operation.

[0022] The anti-caking device 2 further includes a pressing block 27, a telescopic ring 28, and a perforated plate 29. The pressing block 27 is fixed to the bottom surface of the upper mold 22, the telescopic ring 28 is fixed to the bottom surface of the upper mold 22, the perforated plate 29 is fixed to the telescopic end of the telescopic ring 28. Exhaust holes are provided on the side surface of the telescopic end of the telescopic ring 28. When the upper mold 22 moves downward, it will drive air flow, and these air flows are likely to blow away the raw metal powder materials. Therefore, the perforated plate 29 and the exhaust holes provided on the side surface of the telescopic end of the telescopic ring 28 are used to guide the downward air flow, so that the downward air flow is discharged from the bottom surface of the perforated plate 29 to the side exhaust holes. The pressing block 27 moves downward. When the perforated plate 29 contacts the raw materials, the pressing block 27 continues to press downward, causing the telescopic ring 28 to contract. The pressing block 27 fills the hollow part of the perforated plate 29, so that the bottom surface of the entire upper mold 22 remains smooth and flat. In this way, the stability of the powder raw materials during downward pressing can be maintained, and the purpose of preventing the metal powder from being blown away can be achieved.

[0023] The leveling device 3 includes a first screw 31, a moving block 32, a lower mold 33, a telescopic connecting rod 34, a collecting box 35, a rebounding rod 36, and a leveling plate 37. The first screw 31 is fixed to the output end of the motor, and the motor is fixed to the left side of the operating table 11. When the motor is started, the motor drives the first screw 31 to rotate. The moving block 32 is threadedly connected to the outer wall of the first screw 31. The first screw 31 drives the moving block 32 to move backward. The top of the moving block 32 penetrates and is slidably installed on the top surface of the operating table 11. The lower mold 33 is clamped to the top of the moving block 32. The moving block 32 drives the lower mold 33 to move to the pressing point. One end of the telescopic connecting rod 34 is fixed to both sides of the top of the moving block 32, and the collecting box 35 is fixed to the other end of the telescopic connecting rod 34. The rebounding rods 36 are fixed to both sides of the inner wall of the protective cover 12, and the leveling plate 37 is fixed to the telescopic ends of the rebounding rods 36. Before the lower mold 33 reaches the pressing point, it will pass through the bottom of the rebounding rods 36 and the leveling plate 37. The contact surface between the leveling plate 37 and the highest point of the lower mold 33 is automatically adjusted by using the rebounding rods 36 and the leveling plate 37. The excess powder on the lower mold 33 is scraped and cleaned by using the leveling plate 37, so that the surface of the powder is flat, improving the quality of the pressed alloy finished product. At the same time, the moving block 32 drives the telescopic connecting rod 34 to move backward, and the telescopic connecting rod 34 drives the collecting box 35 to move backward. The collecting box 35 is used to collect and store the scraped powder, avoiding material waste and keeping the inside of the machine clean.

[0024] The leveling device 3 further includes a toothed plate 38, a bump 39, a second screw 310, a gear 311, and a push plate 312. The toothed plate 38 is fixed to the right side of the telescopic connecting rod 34. When the telescopic connecting rod 34 moves backward, the telescopic connecting rod 34 drives the toothed plate 38 to move backward. The bump 39 is fixed to the top surface of the leveling plate 37. The left end of the second screw 310 is rotatably installed on the right side of the bump 39. The gear 311 is fixed to the right end of the second screw 310. The gear 311 is located on the movement track of the toothed plate 38. The toothed plate 38 drives the gear 311 to rotate, and the gear 311 drives the second screw 310 to rotate. The push plate 312 is threadedly connected to the outer wall of the second screw 310. The push plate 312 is slidably installed on the top surface of the leveling plate 37. The second screw 310 drives the push plate 312 to move, and the powder in the collection box 35 is leveled and sorted by the push plate 312, so as to avoid the powder accumulating in the middle of the collection box 35, resulting in the limited loading capacity of the collection box 35, improve the loading capacity of the collection box 35, and reduce the frequency of manual cleaning.

[0025] During use, the lifting cylinder 21 is started, and the lifting cylinder 21 drives the upper die 22 to move downward. The upper die 22 drives the lower pressing strip 25 to move downward. The lower pressing strip 25 drives the hollow block 24 to move downward. The hollow block 24 drives the telescopic group rod 23 to move downward. After the pressing is completed, the lifting cylinder 21 drives the upper die 22 to move upward. Under the action of the spring force, the telescopic group rod 23 rebounds upward. The telescopic group rod 23 drives the hollow block 24 to rebound upward. When the telescopic group rod 23 reaches the highest point, the upper die 22 continues to move upward. At this time, the telescopic group rod 23 pops out, and the telescopic group rod 23 pushes the hollow block 24 to move along the bottom edge of the obtuse block 26. The scraper inside the hollow block 24 pops out without the pressing of the lower pressing strip 25. The scraper follows the hollow block 24 to move and scrapes the bottom surface of the upper die 22, so as to achieve the purpose of cleaning the condensed powder block on the bottom surface of the die, avoid the powder block causing depressions on the surface of the raw material during the next pressing, resulting in the failure of pressing. When pressing down again, the upper die 22 drives the obtuse block 26 to move downward. The obtuse block 26 squeezes open the hollow block 24, causing the hollow block 24 to move to both sides and reset to both ends of the upper die 22, so as to perform the next operation; when the upper die 22 moves downward, it will drive air flow, and these air flows are likely to cause the metal powder raw material to be blown away. Therefore, the hollow plate 29 and the exhaust holes opened on the side surface of the telescopic end of the telescopic ring 28 are used to divert the downward air flow, so that the downward air flow is discharged from the bottom surface of the hollow plate 29 to the side exhaust holes. The pressing block 27 moves downward. When the hollow plate 29 contacts the raw material, the pressing block 27 continues to press down, causing the telescopic ring 28 to contract. The pressing block 27 fills the hollow part of the hollow plate 29, so that the bottom surface of the entire upper die 22 remains smooth and flat, so as to keep the powder raw material stable during pressing and achieve the purpose of avoiding the metal powder from being blown away.

[0026] Start the motor. The motor drives the first screw 31 to rotate. The first screw 31 drives the moving block 32 to move backward. The moving block 32 drives the lower mold 33 to move to the pressing point. Before the lower mold 33 reaches the pressing point, it will pass through the bottom of the spring-back rod 36 and the leveling plate 37. The spring-back rod 36 and the leveling plate 37 are used to automatically adjust the contact surface between the highest point of the leveling plate 37 and the lower mold 33. The leveling plate 37 is used to scrape and clean the excess powder on the lower mold 33, making the powder surface flat and improving the quality of the pressed alloy finished product. At the same time, the moving block 32 drives the telescopic connecting rod 34 to move backward. The telescopic connecting rod 34 drives the collection box 35 to move backward. The collection box 35 is used to collect and store the scraped powder, avoiding material waste and keeping the inside of the machine clean. When the telescopic connecting rod 34 moves backward, the telescopic connecting rod 34 drives the toothed plate 38 to move backward. The toothed plate 38 drives the gear 311 to rotate. The gear 311 drives the second screw 310 to rotate. The second screw 310 drives the push plate 312 to move. The push plate 312 is used to level the powder in the collection box 35, avoiding powder accumulation in the middle of the collection box 35, which limits the loading capacity of the collection box 35, improving the loading capacity of the collection box 35 and reducing the frequency of manual cleaning.

[0027] Please refer to Figures 1-9 , on the basis of the above embodiments, in another embodiment of the present invention, The unloading device 4 includes an elastic square block 41, a round rod 42, a sliding template 43 and a trapezoidal block 44. The sliding template 43 is slidably installed on the inner wall of the lower mold 33. When the lower mold 33 moves backward after pressing, the lower mold 33 drives the sliding template 43 to move backward. The round rod 42 is fixed on both sides of the sliding template 43. The sliding template 43 drives the round rod 42 to move backward. Square through grooves for the movement of the round rod 42 are opened on both sides of the lower mold 33. The trapezoidal block 44 is fixed on the top surface of the operating table 11. The trapezoidal block 44 is located on the movement track of the round rod 42. The round rod 42 will pass through and press the trapezoidal block 44 during the movement. The trapezoidal block 44 is pressed to make the round rod 42 move upward. The elastic square block 41 is fixed on both sides of the lower mold 33. The round rod 42 is located on the movement track of the elastic square block 41. The elastic square block 41 contracts. The round rod 42 drives the sliding template 43 to move upward. Using the dislocation between the sliding template 43 and the lower mold 33, the automatically demoulding of the pressed and formed product is realized, reducing the workload of the staff and greatly improving the production efficiency.

[0028] The discharging device 4 further includes a semi-circular block 45, a connecting plate 46 and a knocking column 47. The semi-circular block 45 is fixed on the top surface of the trapezoidal block 44. The semi-circular block 45 is located on the movement track of the round rod 42. When the round rod 42 slides over the top surface of the trapezoidal block 44, the round rod 42 will squeeze and collide with the semi-circular block 45. Combined with the downward pressure of the elastic square block 41, the round rod 42 will move up and down continuously. The connecting plate 46 is fixed on the outside of the trapezoidal block 44 through a spring. The round rod 42 drives the sliding template 43 to move up and down continuously. By using the vibration of the sliding template 43, the demoulding efficiency can be improved, and the damage during the demoulding of the finished product can also be reduced. The connecting plate 46 is located on the movement track of the round rod 42. At the same time, the round rod 42 squeezes the top of the connecting plate 46, and the connecting plate 46 moves away from the trapezoidal block 44. The knocking column 47 is fixed on the side of the connecting plate 46 close to the trapezoidal block 44. The connecting plate 46 drives the knocking column 47 to move away from the trapezoidal block 44. The knocking column 47 penetrates the side surface of the trapezoidal block 44. The lower die 33 is located on the movement track of the knocking column 47. When the round rod 42 falls into the groove on the top of the connecting plate 46, under the action of the spring force, the connecting plate 46 rebounds towards the trapezoidal block 44, and the connecting plate 46 drives the knocking column 47 to rebound towards the trapezoidal block 44. The knocking column 47 hits the side surface of the lower die 33, so as to achieve the purpose of vibrating the lower die 33, making the demoulding smoother and further increasing the demoulding success rate.

[0029] The positioning device 5 includes a limit plate 51, a telescopic square column 52, a damping rod 53 and a baffle 54. The telescopic square column 52 is fixed on the top surface of the inner wall of the protective cover 12. The limit plate 51 is fixed on the telescopic end of the telescopic square column 52. When the lower die 33 reaches the pressing point, in order to ensure that the upper die 22 and the lower die 33 can be aligned, the limit plate 51 is used to limit the lower die 33 to achieve the purpose of positioning, making the pressing more accurate. The top of the limit plate 51 is located on the movement track of the upper die 22. When the pressing is completed and the upper die 22 moves upward, the upper die 22 drives the limit plate 51 to move upward, and the telescopic square column 52 contracts, so that the linkage unlocking can be carried out to achieve the positioning and release of the lower die 33. The damping rod 53 is fixed at the bottom of the limit plate 51, and the baffle 54 is fixed at the front end of the damping rod 53. The baffle 54 is located on the movement track of the lower die 33. At the same time, when the lower die 33 collides with the limit plate 51, since the lower die 33 is loaded with metal powder, it is easy for the powder to fly out due to the impact, resulting in the lack of pressing materials. Therefore, the baffle 54 is used to contact the lower die 33 first. The lower die 33 pushes the baffle 54, and the baffle 54 squeezes the damping rod 53. The damping rod 53 is used to buffer and decelerate the lower die 33 to achieve the purpose of preventing the metal powder in the lower die 33 from flying, improving the yield of the pressed product and avoiding the waste of materials.

[0030] The positioning device 5 further includes a fastener 55, an elastic column 56, and a chamfered block 57. The fastener 55 is fixed on both sides of the limit plate 51, and the elastic column 56 is fixed on both sides of the lower die 33. When the lower die 33 moves backward and approaches the limit plate 51, the lower die 33 drives the elastic column 56 to move backward. The chamfered block 57 is fixed at the top of the elastic column 56, and the elastic column 56 drives the chamfered block 57 to move backward. The fastener 55 is located on the movement track of the chamfered block 57. The chamfered block 57 collides with the front end of the fastener 55, and the chamfered block 57 is squeezed and moves downward. The chamfered block 57 drives the elastic column 56 to contract. When the front end of the fastener 55 reaches the front end of the chamfered block 57, the elastic column 56 pops out, and the chamfered block 57 is stuck at the bottom of the fastener 55, so as to achieve the purpose of fixing the relative positions of the lower die 33 and the limit plate 51, making the positioning more accurate and also avoiding misoperation and movement of the lower die 33 during the pressing process. When the limit plate 51 moves upward, the limit plate 51 drives the fastener 55 to move upward, so that it can be automatically unfastened, making the device more convenient and automated to use.

[0031] During use, when the lower die 33 moves backward after the pressing is completed, the lower die 33 drives the sliding template 43 to move backward. The sliding template 43 drives the round rod 42 to move backward. During the movement of the round rod 42, it will pass through and squeeze the trapezoidal block 44. The trapezoidal block 44 is squeezed to make the round rod 42 move upward, and the elastic square block 41 contracts. The round rod 42 drives the sliding template 43 to move upward. By using the dislocation between the sliding template 43 and the lower die 33, the finished product after pressing is automatically demolded, reducing the workload of the staff and greatly improving the production efficiency. When the round rod 42 slides over the top surface of the trapezoidal block 44, the round rod 42 will squeeze and collide with the semi-circular block 45. Coupled with the downward pressure of the elastic square block 41, the round rod 42 will move up and down continuously. The round rod 42 drives the sliding template 43 to move up and down continuously. By using the jitter of the sliding template 43, the demolding efficiency is improved, and the damage during the demolding process of the finished product can also be reduced. At the same time, the round rod 42 squeezes the top of the connecting plate 46, and the connecting plate 46 moves away from the trapezoidal block 44. The connecting plate 46 drives the knocking column 47 to move away from the trapezoidal block 44. When the round rod 42 falls into the groove on the top of the connecting plate 46, under the action of the spring force, the connecting plate 46 rebounds towards the trapezoidal block 44, and the connecting plate 46 drives the knocking column 47 to rebound towards the trapezoidal block 44. The knocking column 47 impacts the side of the lower die 33, so as to achieve the purpose of vibrating the lower die 33, making the demolding smoother and further increasing the demolding success rate.

[0032] When the current die 33 reaches the pressing point, in order to ensure that the upper die 22 and the lower die 33 can be aligned, the limiting plate 51 is used to limit the lower die 33 to achieve the purpose of positioning, making the pressing more accurate. After the pressing is completed, the upper die 22 moves upward, and the upper die 22 drives the limiting plate 51 to move upward, and the telescopic square column 52 contracts, so that linkage unlocking can be carried out to achieve the positioning and release of the lower die 33. At the same time, when the lower die 33 collides with the limiting plate 51, since the lower die 33 is loaded with metal powder, the powder is likely to fly out due to the impact, resulting in the lack of pressing material. Therefore, the baffle 54 is used to contact the lower die 33 first. The lower die 33 pushes the baffle 54, and the baffle 54 squeezes the damping rod 53. The damping rod 53 is used to buffer and decelerate the lower die 33 to achieve the purpose of preventing the metal powder in the lower die 33 from flying, improving the yield rate of pressing and avoiding the waste of materials. When the lower die 33 moves backward and approaches the limiting plate 51, the lower die 33 drives the elastic column 56 to move backward, the elastic column 56 drives the chamfered block 57 to move backward, the chamfered block 57 collides with the front end of the fastener 55, the chamfered block 57 is squeezed and moves downward, and the chamfered block 57 drives the elastic column 56 to contract. When the front end of the fastener 55 reaches the front end of the chamfered block 57, the elastic column 56 pops out, and the chamfered block 57 is clamped into the bottom of the fastener 55, so as to achieve the purpose of fixing the relative position of the lower die 33 and the limiting plate 51, making the positioning more accurate and also avoiding misoperation and movement of the lower die 33 during the pressing process. When the limiting plate 51 moves upward, the limiting plate 51 drives the fastener 55 to move upward, so that it can be self-unfastened, making the device more convenient and automated to use.

[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A powder metallurgy method for a pressing and forming device used in the processing of cemented carbide, including an operating table (11), and a protective cover (12) is fixed on the top surface of the operating table (11), characterized in that: On the top surface of the operation table (11), there are an anti-caking device (2), a leveling device (3), a discharging device (4), and a positioning device (5); the anti-caking device (2) includes a lifting cylinder (21), an upper mold (22), a telescopic group rod (23), a hollow block (24), a lower pressing strip (25), and an obtuse-angle block (26). The lifting cylinder (21) is fixed on the top surface of the inner wall of the protective cover (12), the upper mold (22) is fixed on the telescopic end of the lifting cylinder (21), the telescopic group rod (23) is slidably installed on both sides of the inner wall of the protective cover (12), a spring is arranged between the telescopic group rod (23) and the inner wall of the protective cover (12), the hollow block (24) is fixed on the telescopic end of the telescopic group rod (23), a scraping plate is slidably installed on the top surface of the inner wall of the hollow block (24), a spring is arranged between the scraping plate and the inner wall of the hollow block (24), the lower pressing strip (25) is fixed on the top surface of the upper mold (22), the hollow block (24) is located on the movement track of the lower pressing strip (25), the obtuse-angle block (26) is fixed on the back of the upper mold (22), and the hollow block (24) is located on the movement track of the obtuse-angle block (26).

2. The powder metallurgy method for producing a pressing and forming device for hard alloy processing according to claim 1, characterized in that: The anti-caking device (2) further includes a pressing block (27), a telescopic ring (28), and a hollow plate (29). The pressing block (27) is fixed on the bottom surface of the upper mold (22), the telescopic ring (28) is fixed on the bottom surface of the upper mold (22), the hollow plate (29) is fixed on the telescopic end of the telescopic ring (28), and exhaust holes are formed on the side surface of the telescopic end of the telescopic ring (28).

3. The powder metallurgy method for manufacturing a compacting and forming device for hard alloy processing according to claim 2, wherein: The leveling device (3) includes a first screw rod (31), a moving block (32), a lower mold (33), a telescopic connecting rod (34), a collecting box (35), a rebounding rod (36), and a leveling plate (37). The first screw rod (31) is fixed on the output end of the motor, the motor is fixed on the left side of the operation table (11), the moving block (32) is threadedly connected to the outer wall of the first screw rod (31), the top of the moving block (32) penetrates through and is slidably installed on the top surface of the operation table (11), the lower mold (33) is clamped on the top of the moving block (32), one end of the telescopic connecting rod (34) is fixed on both sides of the top of the moving block (32), the collecting box (35) is fixed on the other end of the telescopic connecting rod (34), the rebounding rods (36) are fixed on both sides of the inner wall of the protective cover (12), and the leveling plate (37) is fixed on the telescopic end of the rebounding rod (36).

4. A powder metallurgy method for a compacting and forming device for hard alloy processing according to claim 3, characterized in that: The leveling device (3) further includes a toothed plate (38), a convex block (39), a second screw rod (310), a gear (311), and a pushing plate (312). The toothed plate (38) is fixed on the right side of the telescopic connecting rod (34), the convex block (39) is fixed on the top surface of the leveling plate (37), the left end of the second screw rod (310) is rotatably installed on the right side of the convex block (39), the gear (311) is fixed on the right end of the second screw rod (310), the gear (311) is located on the movement track of the toothed plate (38), the pushing plate (312) is threadedly connected to the outer wall of the second screw rod (310), and the pushing plate (312) is slidably installed on the top surface of the leveling plate (37).

5. The powder metallurgy method for manufacturing a compacting and forming device for hard alloy processing according to claim 4, characterized in that: The discharging device (4) includes an elastic square block (41), a round rod (42), a sliding template (43) and a trapezoidal block (44). The sliding template (43) is slidably installed on the inner wall of the lower die (33). The round rod (42) is fixed on both sides of the sliding template (43). Square through grooves for the movement of the round rod (42) are formed on both sides of the lower die (33). The trapezoidal block (44) is fixed on the top surface of the operating table (11). The trapezoidal block (44) is located on the movement track of the round rod (42). The elastic square block (41) is fixed on both sides of the lower die (33). The round rod (42) is located on the movement track of the elastic square block (41).

6. A powder metallurgy method for a compacting and forming device for processing cemented carbide, characterized in that: The discharging device (4) further includes a semi-circular block (45), a connecting plate (46) and a knocking column (47). The semi-circular block (45) is fixed on the top surface of the trapezoidal block (44). The semi-circular block (45) is located on the movement track of the round rod (42). The connecting plate (46) is fixed on the outer side of the trapezoidal block (44) through a spring. The connecting plate (46) is located on the movement track of the round rod (42). The knocking column (47) is fixed on the side of the connecting plate (46) close to the trapezoidal block (44). The knocking column (47) penetrates through the side surface of the trapezoidal block (44). The lower die (33) is located on the movement track of the knocking column (47).

7. A powder metallurgy method for a pressing and forming device for processing cemented carbide, characterized in that: The positioning device (5) includes a limiting plate (51), a telescopic square column (52), a damping rod (53) and a baffle plate (54). The telescopic square column (52) is fixed on the top surface of the inner wall of the protective cover (12). The limiting plate (51) is fixed on the telescopic end of the telescopic square column (52). The top end of the limiting plate (51) is located on the movement track of the upper die (22). The damping rod (53) is fixed at the bottom of the limiting plate (51). The baffle plate (54) is fixed at the front end of the damping rod (53). The baffle plate (54) is located on the movement track of the lower die (33).

8. A powder metallurgy method for a compacting and forming device for processing cemented carbide, characterized in that: The positioning device (5) further includes a fastener (55), an elastic column (56) and a chamfered block (57). The fastener (55) is fixed on both sides of the limiting plate (51). The elastic column (56) is fixed on both sides of the lower die (33). The chamfered block (57) is fixed on the top end of the elastic column (56). The fastener (55) is located on the movement track of the chamfered block (57).

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