Blank pressing device for tungsten steel die machining

Abstract

The invention relates to the technical field of tungsten steel mold machining, in particular to a blank pressing device for tungsten steel mold machining, which comprises a working box and a supporting plate fixedly mounted on the side surface of the working box, a mold seat for loading tungsten steel powder is fixedly mounted at the top of the working box, and a demolding mechanism for discharging a mold blank is arranged in the working box; a feeding mechanism used for feeding tungsten steel powder is arranged at the top of the supporting plate. The extending end of the second air cylinder is controlled to be shrunk to be the shortest, at the moment, the piston is located between the air inlet pipe and the air outlet pipe, the air pump and the electric heating rod are started, airflow entering the discharging hopper is heated through the electric heating rod and discharged out of the output end of the discharging pipe, and in the process, water on the inner walls of the discharging hopper, the hose and the discharging pipe is cleared away; the influence on the water content of the tungsten steel powder is prevented, the spallation caused by the volume expansion of the mold blank is avoided, and the mechanical property and wear resistance of the product are ensured.

Description

Technical Field

[0001] This invention relates to the field of tungsten carbide mold processing technology, specifically to a blank pressing device for tungsten carbide mold processing. Background Technology

[0002] The pressing device for tungsten carbide mold processing is mainly used to press tungsten carbide material into mold blanks of specific shapes and sizes. The device usually consists of a frame, a pressing mechanism, a drive mechanism, etc. In the pressing process, tungsten carbide powder is first placed into the mold base, and then the drive mechanism is started to make the pressing mechanism move downward to press the tungsten carbide powder. After pressing is completed, the mold blank is taken out. Because the pressing device is placed in a humid environment for a long time, moisture will adhere to the inner wall of the hopper used to guide the tungsten carbide powder. During the process of feeding the tungsten carbide powder into the mold base, the moisture content of the tungsten carbide powder is easily affected, causing the volume of the mold blank to expand and produce delamination, reducing the mechanical properties and wear resistance of the product. At the same time, during the process of feeding the mold blank, the force pushing the mold blank is constant, and the instantaneous shear stress can easily cause the edge of the mold blank to crack or the surface to scratch. Summary of the Invention

[0003] The technical problem that this solution addresses is: (1) How to solve the problem that during the process of adding tungsten carbide powder into the mold base, the moisture content of the tungsten carbide powder is easily affected, causing the volume of the mold blank to expand and produce delamination, which reduces the mechanical properties and wear resistance of the product; (2) How to solve the problem that during the blanking process of the die blank, the instantaneous shear stress can easily cause the edge of the die blank to crack or the surface to scratch.

[0004] The objective of this invention can be achieved through the following technical solution: a pressing device for tungsten carbide mold processing, comprising a working box and a support plate fixedly installed on its side, a mold base for loading tungsten carbide powder is fixedly installed on the top of the working box, and a demolding mechanism for unloading the mold blank is provided inside the working box, and a feeding mechanism for feeding tungsten carbide powder is provided on the top of the support plate. The feeding mechanism includes a movable plate that is slidably connected to a support plate via a guide rail. A positioning plate is fixedly installed on the movable plate, and a feeding hopper is fixedly installed on the positioning plate. A drying unit for blowing dry the inner wall of the feeding hopper is provided on the front of the positioning plate.

[0005] A further technical improvement of the present invention is that a fixing plate is also fixedly installed on the movable plate, and an oblique hole is provided in the middle of the fixing plate. A feeding pipe is rotatably arranged in the oblique hole through a connecting shaft, and the input end of the feeding pipe is connected to the bottom of the feeding hopper through a flexible hose.

[0006] A further technical improvement of the present invention is that: the support plate is also fixedly mounted with a first cylinder for driving the moving plate, and an L-shaped frame is fixedly connected to the fixed plate, one end of the L-shaped frame being fixedly connected to the front of the feed tube input end by a tension spring.

[0007] A further technical improvement of the present invention is that: the drying unit includes an adjusting pipe connected to the side wall of the hopper, the adjusting pipe is arranged horizontally, and an air inlet pipe and an air outlet pipe are respectively connected to the bottom two sides of the adjusting pipe; an air pump is provided on the top of the moving plate, the output end of the air pump is connected to the input end of the air inlet pipe, and the output end of the air outlet pipe is in frontal contact with the input end of the hopper pipe.

[0008] A further technical improvement of the present invention is that: an L-shaped rod is rotatably provided on the front side of the positioning plate, a baffle plate for blocking the hopper is fixedly installed at one end of the L-shaped rod, and an electric heating rod is fixedly installed at the bottom of the baffle plate, with the electric heating rod positioned close to the regulating tube.

[0009] A further technical improvement of the present invention is that: a second cylinder arranged horizontally is fixedly installed on the positioning plate. The extended end of the second cylinder movably passes through the adjusting pipe and is fixedly installed with a piston. The extended end of the second cylinder is also movably connected to the other end of the L-shaped rod through the first lever. By controlling the extended end of the second cylinder to retract to its shortest length, the piston is located between the air inlet pipe and the air outlet pipe. The air pump and the electric heating rod are turned on, so that the airflow entering the feeding hopper is heated by the electric heating rod and discharged from the output end of the feeding pipe. During this process, the moisture on the inner wall of the feeding hopper, hose and feeding pipe is cleaned off to prevent it from affecting the moisture content of the tungsten steel powder and to avoid causing the mold blank to expand and crack, thus ensuring the mechanical properties and wear resistance of the product. Then, the extended end of the second cylinder is controlled to extend to its longest length, so that the piston slides to the end of the adjusting pipe close to the feeding hopper. The airflow will blow out from the output end of the air outlet pipe. While blowing open the feeding pipe, the tension of the tension spring causes the feeding pipe to swing back and forth, so that the tungsten steel powder discharged from the output end of the feeding pipe can be evenly spread in the mold base.

[0010] A further technical improvement of the present invention is that: the demolding mechanism includes a guide sleeve fixedly connected to the inner wall of the working box, a square rod slidably disposed on the inner wall of the guide sleeve, the square rod being arranged longitudinally, and a push plate being fixedly installed in the middle of the square rod.

[0011] A further technical improvement of the present invention is that: a push sleeve is movably sleeved on the square rod between the push plate and the guide sleeve, a second lever is fixedly installed on the front side of the push sleeve, and a flip plate is rotatably arranged on the inner wall of the working box on one side of the square rod, and the middle part of the flip plate is movably connected to the second lever.

[0012] A further technical improvement of the present invention is that: the top end of the square rod movably passes through the work box and the mold seat, and a feeding plate is fixedly installed thereon; the edge of the feeding plate is slidably connected to the inner wall of the mold seat; a thrust spring is elastically provided between the push plate and the push sleeve; the extended end of the hydraulic cylinder is controlled to retract to its shortest length, and the lifting rod is pulled up by the lifting plate, which in turn drives the flipping plate to rotate, so that the second lever and the push sleeve move upward. The push sleeve pushes the thrust spring, providing a gradually increasing thrust to the push plate, which facilitates the square rod and the feeding plate to stably feed the mold blank in the mold seat, avoiding instantaneous shear stress that could cause the edge of the mold blank to crack or the surface to scratch.

[0013] A further technical improvement of the present invention is that: a lifting rod is provided on the other side of the square rod, the lifting rod is arranged longitudinally, the top end of the lifting rod movably passes through the work box, and a fixing pin is fixedly connected to the bottom end of the lifting rod. The fixing pin is slidably connected to one end of the flip plate, and the fixing pin is located below the flip plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are: In use, this invention involves controlling the extension end of the second cylinder to retract to its shortest length. At this point, the piston is positioned between the inlet and outlet pipes. The air pump and electric heating rod are activated, allowing the airflow entering the hopper to be heated by the electric heating rod and discharged from the outlet pipe. During this process, moisture on the hopper, hose, and inner wall of the discharge pipe is removed, preventing it from affecting the moisture content of the tungsten carbide powder and avoiding expansion of the mold blank that could cause delamination. This ensures the mechanical properties and wear resistance of the product. Then, the extension end of the second cylinder is extended to its longest length, causing the piston to slide to the end of the adjusting pipe near the hopper. The airflow will then blow out from the outlet pipe, opening the discharge pipe. Simultaneously, the tension spring causes the discharge pipe to oscillate back and forth, facilitating the uniform distribution of the tungsten carbide powder discharged from the outlet pipe into the mold base.

[0015] In use, the extended end of the hydraulic cylinder is controlled to retract to its shortest length. The lifting plate pulls the lifting rod upward, which, together with the fixing pin, drives the flipping plate to rotate. This causes the second lever and the push sleeve to move upward. The push sleeve pushes the thrust spring, providing a gradually increasing thrust to the push plate. This facilitates the square rod and the material feeding plate to stably feed the mold blank into the mold base, avoiding instantaneous shear stress that could cause the mold blank to crack at the edge or scratch on the surface. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the overall front structure of the present invention; Figure 3 This is a schematic diagram of the feeding mechanism of the present invention; Figure 4 This is a three-dimensional schematic diagram of the feeding mechanism structure of the present invention; Figure 5 This is a schematic diagram of the demolding mechanism of the present invention; Figure 6 This is a three-dimensional schematic diagram of a partial structure of the demolding mechanism of the present invention.

[0018] In the diagram: 1. Storage bin; 2. Support frame; 3. Feeding mechanism; 4. Support plate; 5. Working box; 6. Mold base; 7. Lifting plate; 8. Discharge pipe; 9. Demolding mechanism; 10. Guide rod; 11. Hydraulic cylinder; 301. Baffle plate; 302. Piston; 303. L-shaped rod; 304. Second cylinder; 305. Positioning plate; 306. Air outlet pipe; 307. Air inlet pipe; 308. Moving plate; 309. Fixed. 310. Plate; 311. Feeding pipe; 312. Inclined hole; 313. Flexible hose; 314. Feeding hopper; 315. Electric heating rod; 316. Adjusting pipe; 317. First cylinder; 318. Air pump; 319. L-shaped frame; 901. Feeding plate; 902. Push plate; 903. Pushing sleeve; 904. Square rod; 905. Fixing pin; 906. Tilting plate; 907. Lifting rod; 908. Guide sleeve; 909. Second lever. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-6 As shown, a pressing device for processing tungsten carbide molds includes a working box 5 and a support plate 4 fixedly installed on its side. A mold base 6 for loading tungsten carbide powder is fixedly installed on the top of the working box 5, and a demolding mechanism 9 for unloading the mold blank is provided inside the working box 5. A feeding mechanism 3 for feeding tungsten carbide powder is provided on the top of the support plate 4.

[0021] Please see Figure 2 and Figure 3 As shown, the above-mentioned feeding mechanism 3 includes a movable plate 308 that is slidably connected to the support plate 4 via a guide rail. A positioning plate 305 is fixedly installed on the movable plate 308, and a feeding hopper 313 is fixedly installed on the positioning plate 305. A drying unit for blowing dry the inner wall of the feeding hopper 313 is provided on the front side of the positioning plate 305.

[0022] Please see Figure 3 As shown, a fixed plate 309 is also fixedly installed on the movable plate 308. An oblique hole 311 is provided in the middle of the fixed plate 309. A feed pipe 310 is rotatably installed in the oblique hole 311 through a connecting shaft. The input end of the feed pipe 310 is connected to the bottom of the feed hopper 313 through a flexible hose 312.

[0023] Please see Figure 2 and Figure 3 As shown, the support plate 4 is also fixedly mounted with a first cylinder 316 for driving the moving plate 308, and an L-shaped frame 318 is fixedly connected to the fixed plate 309. One end of the L-shaped frame 318 is fixedly connected to the front of the input end of the feed tube 310 through a tension spring.

[0024] Please see Figure 3 and Figure 4 As shown, the drying unit includes an adjusting pipe 315 connected to the side wall of the feeding hopper 313. The adjusting pipe 315 is arranged horizontally, and an air inlet pipe 307 and an air outlet pipe 306 are respectively connected to the bottom two sides of the adjusting pipe 315. An air pump 317 is provided on the top of the moving plate 308. The output end of the air pump 317 is connected to the input end of the air inlet pipe 307, and the output end of the air outlet pipe 306 is in contact with the front of the input end of the feeding pipe 310.

[0025] Please see Figure 3 As shown, an L-shaped rod 303 is rotatably provided on the front of the positioning plate 305. A baffle plate 301 for blocking the feed hopper 313 is fixedly installed at one end of the L-shaped rod 303. An electric heating rod 314 is fixedly installed at the bottom of the baffle plate 301. The electric heating rod 314 is located near the regulating tube 315.

[0026] Please see Figure 3 and Figure 4As shown, a second cylinder 304 arranged horizontally is also fixedly installed on the positioning plate 305. The extended end of the second cylinder 304 movably passes through the adjusting pipe 315 and is fixedly mounted with a piston 302. The extended end of the second cylinder 304 is also movably connected to the other end of the L-shaped rod 303 through the first lever. By controlling the extended end of the second cylinder 304 to retract to its shortest length, at this time, the piston 302 is located between the air inlet pipe 307 and the air outlet pipe 306. The air pump 317 and the electric heating rod 314 are turned on, so that the airflow entering the hopper 313 is heated by the electric heating rod 314 and discharged from the output end of the discharge pipe 310. During this process, the discharge... Moisture on the inner walls of the hopper 313, hose 312, and feed pipe 310 is removed to prevent it from affecting the moisture content of the tungsten carbide powder and to avoid causing the mold blank to expand and crack, thus ensuring the mechanical properties and wear resistance of the product. Then, the extension end of the second cylinder 304 is controlled to extend to its maximum length, so that the piston 302 slides to the end of the regulating pipe 315 near the feed hopper 313. The airflow will blow out from the output end of the air outlet pipe 306, opening the feed pipe 310. At the same time, the tension of the tension spring causes the feed pipe 310 to swing back and forth, so that the tungsten carbide powder discharged from the output end of the feed pipe 310 can be evenly spread in the mold base 6.

[0027] Please see Figure 2 and Figure 5 As shown, the demolding mechanism 9 includes a guide sleeve 908 fixedly connected to the inner wall of the work box 5. A square rod 904 is slidably arranged on the inner wall of the guide sleeve 908. The square rod 904 is arranged longitudinally, and a push plate 902 is fixedly installed in the middle of the square rod 904.

[0028] Please see Figure 5 and Figure 6 As shown, a push sleeve 903 is movably sleeved on the square rod 904 between the push plate 902 and the guide sleeve 908. A second lever 909 is fixedly installed on the front of the push sleeve 903. A flip plate 906 is rotatably arranged on the inner wall of the work box 5 on one side of the square rod 904. The middle part of the flip plate 906 is movably connected to the second lever 909.

[0029] Please see Figure 5 and Figure 6As shown, the top end of the aforementioned square rod 904 movably passes through the work box 5 and the mold base 6, and a feeding plate 901 is fixedly installed thereon. The edge of the feeding plate 901 is slidably connected to the inner wall of the mold base 6. A thrust spring is elastically provided between the push plate 902 and the push sleeve 903. The extended end of the control hydraulic cylinder 11 is retracted to its shortest length, and the lifting rod 907 is pulled upward by the lifting plate 7. In conjunction with the fixing pin 905, the flip plate 906 is rotated, causing the second lever 909 and the push sleeve 903 to move upward. The push sleeve 903 pushes the thrust spring, providing a gradually increasing thrust to the push plate 902, which facilitates the square rod 904 and the feeding plate 901 to stably feed the mold blank in the mold base 6, avoiding instantaneous shear stress that could cause the edge of the mold blank to crack or the surface to scratch.

[0030] Please see Figure 5 and Figure 6 As shown, a lifting rod 907 is provided on the other side of the aforementioned square rod 904. The lifting rod 907 is arranged longitudinally, and the top end of the lifting rod 907 can be moved through the work box 5. A fixing pin 905 is fixedly connected to the bottom end of the lifting rod 907. The fixing pin 905 is slidably connected to one end of the flip plate 906, and the fixing pin 905 is located below the flip plate 906.

[0031] Please see Figure 1 and Figure 2 As shown, a support frame 2 is fixedly installed on the top of the work box 5. A hydraulic cylinder 11 is fixedly inserted into the top of the support frame 2. A lifting plate 7 is fixedly connected to the extended end of the hydraulic cylinder 11. A pressing block is fixedly installed at the bottom of the lifting plate 7. The size of the pressing block corresponds to the size of the inner wall of the mold base 6.

[0032] Please see Figure 2 As shown, the side of the lifting plate 7 is fixedly connected to the top of the lifting rod 907, and guide rods 10 are movably inserted at the four corners of the lifting plate 7. The guide rods 10 are arranged longitudinally, and the two ends of the guide rods 10 are fixedly connected to the top of the work box 5 and the support frame 2, respectively.

[0033] Please see Figure 2 and Figure 3 As shown, a longitudinally arranged storage bin 1 is also fixedly installed on the top of the support frame 2. The storage bin 1 contains a sufficient amount of tungsten steel powder, and the bottom end of the storage bin 1 is fixedly connected to a discharge pipe 8. A control valve is fixedly installed in the middle of the discharge pipe 8, and the output end of the discharge pipe 8 corresponds to the input end of the hopper 313.

[0034] Working principle: When using this invention, firstly, as... Figure 3 and Figure 4As shown, by controlling the extension end of the second cylinder 304 to retract to its shortest position, the piston 302 is located between the inlet pipe 307 and the outlet pipe 306. Then, the air pump 317 and the electric heating rod 314 are activated, causing the airflow entering the hopper 313 from the inlet pipe 307 to be heated by the electric heating rod 314 and discharged from the output end of the discharge pipe 310. During this process, moisture on the inner walls of the hopper 313, hose 312, and discharge pipe 310 is removed, preventing it from affecting the moisture content of the tungsten carbide powder and avoiding expansion of the mold blank that could cause delamination. This ensures the mechanical properties and wear resistance of the product. Figure 3 and Figure 4 As shown, the extended end of the second cylinder 304 is then controlled to extend to its maximum length, causing the piston 302 to slide to the end of the regulating pipe 315 near the hopper 313. Airflow will then blow out from the output end of the outlet pipe 306, opening the hopper 310. Simultaneously, the tension spring causes the hopper 310 to oscillate back and forth, facilitating the even distribution of tungsten carbide powder discharged from the output end of the hopper 310 within the mold base 6. During this process, the first lever drives the L-shaped rod 303 to rotate, causing the baffle plate 301 to separate from the hopper 313. Figure 2 and Figure 3 As shown, the first cylinder 316 extends to its maximum length, causing the moving plate 308 to move laterally to a set position, so that the output end of the feeding pipe 310 faces the inside of the mold base 6. This opens the control valve, allowing the tungsten carbide powder in the storage tank 1 to enter the mold base 6. After feeding is completed, the control valve is closed promptly, the first cylinder 316 retracts, causing the moving plate 308 to reset. This controls the hydraulic cylinder 11 to extend from half its length to its maximum length, pressing the tungsten carbide powder in the mold base 6 into a compact. Figure 2 , Figure 5 and Figure 6 As shown, by controlling the extended end of the hydraulic cylinder 11 to retract to its shortest length, during this process, the lifting plate 7 pulls the lifting rod 907 upward, which, in conjunction with the fixing pin 905, drives the tilting plate 906 to rotate, causing the second lever 909 and the push sleeve 903 to move upward, as shown. Figure 2 and Figure 5 As shown, by pushing the push sleeve 903 to push the push spring, the push plate 902 is provided with a gradually increasing thrust, which makes it easier for the square rod 904 and the material feeding plate 901 to stably feed the mold blank in the mold base 6, and avoid instantaneous shear stress that could cause the mold blank edge to crack or the surface to scratch.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A blank pressing device for processing tungsten carbide molds, comprising a work box (5) and a support plate (4) fixedly installed on its side, characterized in that: The top of the work box (5) is fixedly installed with a mold base (6) for loading tungsten steel powder, and the inside of the work box (5) is provided with a demolding mechanism (9) for unloading the mold blank. The top of the support plate (4) is provided with a feeding mechanism (3) for feeding tungsten steel powder. The feeding mechanism (3) includes a movable plate (308) slidably connected to the support plate (4), a positioning plate (305) is fixedly installed on the movable plate (308), a feeding hopper (313) is fixedly installed on the positioning plate (305), and a drying unit for blowing dry the inner wall of the feeding hopper (313) is provided on the front of the positioning plate (305).

2. The blank pressing device for tungsten carbide mold processing according to claim 1, characterized in that, A fixed plate (309) is also fixedly installed on the movable plate (308). An oblique hole (311) is provided in the middle of the fixed plate (309). A feed pipe (310) is rotatably installed in the oblique hole (311) through a connecting shaft. The input end of the feed pipe (310) is connected to the bottom of the feed hopper (313) through a flexible hose (312).

3. The blank pressing device for tungsten carbide mold processing according to claim 2, characterized in that, The support plate (4) is also fixedly installed with a first cylinder (316) for driving the moving plate (308). An L-shaped frame (318) is fixedly connected to the fixed plate (309). One end of the L-shaped frame (318) is fixedly connected to the front of the input end of the feed tube (310) through a tension spring.

4. The blank pressing device for tungsten carbide mold processing according to claim 1, characterized in that, The drying unit includes an adjusting pipe (315) connected to the side wall of the feeding hopper (313). The bottom sides of the adjusting pipe (315) are respectively connected to an air inlet pipe (307) and an air outlet pipe (306). An air pump (317) is provided on the top of the moving plate (308). The output end of the air pump (317) is connected to the input end of the air inlet pipe (307). The output end of the air outlet pipe (306) is in front contact with the input end of the feeding pipe (310).

5. The blank pressing device for tungsten carbide mold processing according to claim 1, characterized in that, An L-shaped rod (303) is rotatably mounted on the front of the positioning plate (305). A baffle plate (301) is fixedly mounted on one end of the L-shaped rod (303). An electric heating rod (314) is fixedly mounted on the bottom of the baffle plate (301). The electric heating rod (314) is positioned close to the regulating tube (315).

6. The blank pressing device for tungsten carbide mold processing according to claim 1, characterized in that, A second cylinder (304) is fixedly installed on the positioning plate (305). The extended end of the second cylinder (304) movably passes through the adjusting tube (315) and is fixedly installed with a piston (302). The extended end of the second cylinder (304) is also movably connected to the other end of the L-shaped rod (303) through the first lever.

7. The blank pressing device for tungsten carbide mold processing according to claim 1, characterized in that, The demolding mechanism (9) includes a guide sleeve (908) fixedly connected to the inner wall of the work box (5). A square rod (904) is slidably arranged on the inner wall of the guide sleeve (908), and a push plate (902) is fixedly installed in the middle of the square rod (904).

8. The blank pressing device for tungsten carbide mold processing according to claim 7, characterized in that, A push sleeve (903) is movably sleeved on the square rod (904) between the push plate (902) and the guide sleeve (908). A second lever (909) is fixedly installed on the front of the push sleeve (903). A flip plate (906) is rotatably arranged on the inner wall of the work box (5) on one side of the square rod (904). The middle part of the flip plate (906) is movably connected to the second lever (909).

9. The blank pressing device for tungsten carbide mold processing according to claim 7, characterized in that, The top of the square rod (904) extends through the work box (5) and the mold base (6) and is fixedly installed with a feeding plate (901). A thrust spring is elastically provided between the push plate (902) and the push sleeve (903).

10. A blank pressing device for processing tungsten carbide molds according to claim 7, characterized in that, A lifting rod (907) is provided on the other side of the square rod (904). A fixing pin (905) is fixedly connected to the bottom end of the lifting rod (907). The fixing pin (905) is slidably connected to one end of the flip plate (906).

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