Tungsten carbide powder compression molding device
By evacuating and exhausting in advance, the air hole defects caused by gas residue during the pressing and forming process of tungsten carbide powder is solved, and the molding quality and practicality are improved.
Patent Information
- Application Number
- CN202421799660.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The prior art During the pressing and forming process of tungsten carbide powder, it is easy to cause residual gas in the mold, resulting in defects such as pores in the finished product.
By vacuuming and exhausting in advance, defects such as pores in tungsten carbide powder can be reduced, and molding quality and practicality can be improved. The specific implementation method includes extracting air in the chamber of the upper pressing cylinder and the forming die, and detecting the vacuum degree through a vacuum gauge, closing the valve after reaching the setting, preventing the piston pressure plate from entering the forming die and then exhausting.
It effectively reduces the remaining gaps in the tungsten carbide powder in the mold, reduces defects such as pores in the finished product, and improves molding quality and practicality.
Smart Images
Figure CN222844857U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tungsten carbide, in particular to a tungsten carbide powder pressing and molding device. Background Art
[0002] Tungsten carbide is a compound composed of tungsten and carbon. The pressing of tungsten carbide powder material is to use a mold to press tungsten carbide powder into product parts with certain shape, density, size and strength requirements. The Chinese invention patent application with the prior art publication number CN109822964A proposes a fully automatic tungsten carbide and titanium carbide powder hydraulic press. The hydraulic press is used for pressing and molding tungsten carbide powder. The hydraulic press automatically controls the process action procedures such as powder feeding, powder loading, powder shaking, fixed stroke, fixed pressure, exhaust, pressure holding, pressure relief, pressing and molding, demolding and other process flow actions. The product has uniform density, good size consistency, clear layers after sintering, stable working performance, high production efficiency, simple operation, convenient maintenance, long service life, environmental protection and safety.
[0003] However, the above-mentioned prior art uses the plunger to move throughout its stroke in the cylinder to expel the gas in the cylinder and eliminate vibration and creeping. Since the sealing between the plunger and the cylinder body is relatively high, it is easy for gas to remain between the cylinder body and the plunger, resulting in residual gaps in the tungsten carbide powder in the mold, causing defects such as pores in the finished product, and therefore needs to be improved. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides a tungsten carbide powder pressing and molding device which reduces defects such as pores in the tungsten carbide powder by vacuum exhausting in advance, thereby improving molding quality and practicality.
[0005] The utility model discloses a tungsten carbide powder pressing and forming device, comprises a base, a lifting push cylinder, an upper pressing cylinder and a pressing push cylinder, the fixed end of the lifting push cylinder is mounted on the base, the upper pressing cylinder is mounted on the piston rod of the lifting push cylinder, a chamber is arranged inside the upper pressing cylinder, and the fixed end of the pressing push cylinder is mounted on the upper pressing cylinder; it also comprises a vertical shaft, a piston pressing plate, a forming die, a vacuum tube and a vacuum gauge, a mold positioning structure is arranged in the middle of the base, a mold plug hole connected with the chamber is arranged at the lower part of the upper pressing cylinder, the plug hole is concentric with the positioning structure of the base, the upper end of the vertical shaft is connected with the lower end of the piston rod of the pressing push cylinder, the middle part of the vertical shaft is sealingly and slidingly connected with the top of the upper pressing cylinder, a piston pressing plate is installed at the lower end of the vertical shaft, the piston pressing plate is located in the chamber of the upper pressing cylinder, the lower end of the forming die is detachably inserted in the positioning structure of the base, the upper port of the forming die is detachably and sealably inserted with the plug hole of the upper pressing cylinder, the vacuum tube is installed on the upper pressing cylinder, the vacuum tube is connected with the chamber of the upper pressing cylinder, a valve and a vacuum gauge are arranged on the vacuum tube; when working, the forming die The tungsten carbide powder in the mold is in a state, and the lower end of the forming mold is inserted into the positioning structure of the base, and the piston rod of the lifting push cylinder is contracted to make the upper pressure cylinder descend, so that the upper port of the forming mold is inserted into the jack of the upper pressure cylinder, and the vacuum tube is connected to the external vacuum pump. The vacuum pump is turned on to extract the air in the cavity of the upper pressure cylinder and the forming mold through the vacuum tube, and the vacuum degree in the cavity of the upper pressure cylinder is detected by the vacuum gauge. When the vacuum degree reaches the set value, the valve of the vacuum tube is closed, and the piston rod of the pressing push cylinder is extended to push the vertical axis and the piston pressing plate downward, so that the piston pressing plate enters the upper port of the forming mold to press and form the tungsten carbide powder in the forming mold. Compared with the prior art, the air in the cavity of the upper pressure cylinder and the forming mold is extracted before the tungsten carbide powder is pressed and formed. After the piston pressing plate enters the forming mold, there is no need to exhaust, and there will be no residual air between the piston pressing plate and the forming mold, thereby reducing the residual gap in the tungsten carbide powder in the mold, effectively reducing the defects such as pores in the finished product, and improving the molding quality and practicality.
[0006] Preferably, it also includes a vibration motor, which is installed on the upper pressing cylinder; before pressing the tungsten carbide powder, the vibration motor runs to vibrate the upper pressing cylinder and the forming mold, so that the tungsten carbide powder in the forming mold is more dense and uniform.
[0007] Preferably, a sealing ring is further included, and a sealing ring is arranged on the inner wall of the insertion hole of the upper pressure cylinder; the sealing ring seals and fills the space between the outer wall of the forming mold and the inner wall of the insertion hole of the upper pressure cylinder to improve the sealing effect.
[0008] Preferably, it also includes a feeding hopper and a feeding valve, the lower end of the feeding hopper extends into the chamber of the upper pressing cylinder, the lower part of the chamber of the upper pressing cylinder is funnel-shaped, the bottom of the funnel is aligned with the upper end of the jack of the upper pressing cylinder, and a feeding valve is arranged at the lower end of the feeding hopper; tungsten carbide powder is input into the chamber of the upper pressing cylinder through the feeding hopper, and is input into the forming mold through the funnel at the lower part of the chamber of the upper pressing cylinder, so as to realize efficient filling of tungsten carbide powder, and the feeding valve closes the lower end of the feeding hopper after the filling is completed.
[0009] Preferably, it also includes a sliding rod and a limit plate. The sliding rod is installed on the upper pressure cylinder. A limit plate is arranged on the top of the sliding rod. The diameter of the limit plate is larger than the sliding rod. The fixed end of the pressing push cylinder is slidably connected to the sliding rod, and the limit plate limits the pressing push cylinder. The pressing push cylinder is lifted and lowered on the upper part of the upper pressure cylinder through the sliding rod and the limit plate, and the limit plate limits the lifting and lowering of the pressing push cylinder. When the piston rod of the pressing push cylinder is extended to push the vertical axis and the piston pressure plate to descend to press the tungsten carbide powder in the forming mold, the pressing push cylinder rises under the action of the reaction force and is blocked by the limit plate, thereby achieving a certain buffering effect.
[0010] Preferably, it also includes an impact block and a lifting assembly, the impact block is slidably installed on the vertical axis, and the lifting assembly is arranged on the vertical axis, the lifting assembly drives the impact block to rise along the vertical axis and then fall to hit the piston pressure plate; when the piston rod of the pressing push cylinder is extended, it pushes the vertical axis and the piston pressure plate to press the tungsten carbide powder in the forming die, at this time, the fixed end of the pressing push cylinder reaches the high position of the slide rod and is blocked by the limit plate, the lifting assembly drives the impact block to rise along the vertical axis and then releases it, so that the impact block falls and hits the piston pressure plate, the above operation is repeated, so that the piston pressure plate compacts the tungsten carbide powder in the forming die again, thereby improving the pressing and molding quality of the tungsten carbide powder, and during the compacting process, the fixed end of the pressing push cylinder gradually descends along the slide rod.
[0011] Preferably, the lifting assembly comprises a screw, a motor, an unlocking plate group, two half-threaded sleeves and a special-shaped block, the screw is vertically rotatably mounted on the piston pressure plate, the motor is mounted on the vertical axis through a bracket, the output shaft of the motor is transmission connected to the screw, the unlocking plate group is mounted on the lower part of the bracket, downward push rods are arranged on both sides of the unlocking plate group, a downward wedge block is arranged in the middle of the unlocking plate group, a mounting slot is arranged on the impact block, the two half-threaded sleeves are relatively horizontally slidably mounted on the upper part of the mounting slot of the impact block, threads matching the screw are arranged on the opposite surfaces of the two half-threaded sleeves, the inner edges of the upper ends of the two half-threaded sleeves are arranged with inclined surfaces matching the wedge block of the unlocking plate group, and the lower end outer edges of the two half-threaded sleeves are arranged with guiding inclined surfaces, the special-shaped block is slidably mounted on the lower part of the mounting slot of the impact block, top plates are arranged on both sides of the special-shaped block, the two top plates respectively extend above the impact block along the two side edges of the mounting slot of the impact block, and the two top plates are connected to the two The push rods are aligned, and two pushing surfaces matching the guiding inclined surfaces of the two half-threaded sleeves are arranged in the middle of the special-shaped block; when the tungsten carbide powder in the forming mold needs to be compacted, when the impact block falls on the piston pressure plate, the special-shaped block is pressed into the mounting slot hole of the impact block, so that the pushing surface of the special-shaped block pushes the two half-threaded sleeves inward to push the clamping screw, so that the threads of the two half-threaded sleeves are meshed with the threads of the screw, the motor drives the screw to rotate, and the threads of the screw and the two half-threaded sleeves lift the impact block. When the two push rods of the unlocking plate group are respectively aligned with the top plates of the special-shaped block, the impact block continues to rise, thereby pushing the special-shaped block to the lower part of the mounting slot hole of the impact block, so that the two pushing surfaces of the special-shaped block are disengaged from the guiding inclined surfaces of the two half-threaded sleeves, and the impact block continues to rise so that the wedge-shaped block of the unlocking plate group pushes the two half-threaded sleeves to both sides through the inclined surfaces of the two half-threaded sleeves, so that the two half-threaded sleeves loosen the screw, and at this time the impact block naturally falls and hits the piston pressure plate, which is practical.
[0012] Compared with the prior art, the utility model has the following beneficial effects: the air in the cavity of the upper pressing cylinder and the forming mold is extracted before the tungsten carbide powder is pressed into shape, and there is no need to exhaust air after the piston pressing plate enters the forming mold, and no air will remain between the piston pressing plate and the forming mold, thereby reducing the residual gaps in the tungsten carbide powder in the mold, effectively reducing the generation of defects such as pores in the finished product, and improving the forming quality and practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a front sectional structural schematic diagram of the utility model;
[0014] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;
[0015] Figure 3 It is a schematic diagram of the axonometric structure of the utility model;
[0016] Figure 4 It is a schematic diagram of the structure of the pressing push cylinder, vertical shaft, piston pressure plate and impact block;
[0017] Figure 5 It is a schematic diagram of the structure of the pressing push cylinder, vertical shaft, piston plate and impact block in the exploded state;
[0018] Figure 6 It is a schematic diagram of the structure of the impact block, the semi-threaded sleeve and the special-shaped block in the exploded state.
[0019] Markings in the attached figure: 1. Base; 2. Lifting push cylinder; 3. Upper pressure cylinder; 4. Pressing push cylinder; 5. Vertical axis; 6. Piston pressure plate; 7. Forming mold; 8. Vacuum tube; 9. Vacuum gauge; 10. Vibration motor; 11. Sealing ring; 12. Feeding hopper; 13. Feeding valve; 14. Sliding rod; 15. Limiting plate; 16. Impact block; 17. Screw; 18. Motor; 19. Unlocking plate group; 20. Semi-threaded sleeve; 21. Special-shaped block. DETAILED DESCRIPTION
[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.
[0021] Example 1
[0022] like Figures 1 to 3As shown, a tungsten carbide powder pressing and molding device comprises a base 1, a lifting push cylinder 2, an upper pressing cylinder 3 and a pressing push cylinder 4, wherein the fixed end of the lifting push cylinder 2 is mounted on the base 1, the upper pressing cylinder 3 is mounted on the piston rod of the lifting push cylinder 2, a chamber is arranged inside the upper pressing cylinder 3, and the fixed end of the pressing push cylinder 4 is mounted on the upper pressing cylinder 3; it also comprises a vertical shaft 5, a piston pressing plate 6, a molding die 7, a vacuum tube 8 and a vacuum gauge 9, a mold positioning structure is arranged in the middle of the base 1, a mold jack connected to the chamber is arranged at the lower part of the upper pressing cylinder 3, the jack is concentric with the positioning structure of the base 1, the upper end of the vertical shaft 5 is connected to the lower end of the piston rod of the pressing push cylinder 4, the middle part of the vertical shaft 5 is sealingly and slidably connected to the top of the upper pressing cylinder 3, the piston pressing plate 6 is arranged at the lower end of the vertical shaft 5, the piston The pressing plate 6 is located in the chamber of the upper pressure cylinder 3, the lower end of the forming mold 7 is detachably inserted into the positioning structure of the base 1, the upper port of the forming mold 7 is detachably sealed and inserted with the socket of the upper pressure cylinder 3, the vacuum tube 8 is installed on the upper pressure cylinder 3, the vacuum tube 8 is connected with the chamber of the upper pressure cylinder 3, and a valve and a vacuum gauge 9 are arranged on the vacuum tube 8; it also includes a vibration motor 10, which is installed on the upper pressure cylinder 3; it also includes a sealing ring 11, the inner wall of the socket of the upper pressure cylinder 3 is provided with a sealing ring 11, and it also includes a feeding hopper 12 and a feeding valve 13, the lower end of the feeding hopper 12 extends into the chamber of the upper pressure cylinder 3, the lower part of the chamber of the upper pressure cylinder 3 is funnel-shaped, the bottom of the funnel is aligned with the upper end of the socket of the upper pressure cylinder 3, and the lower end of the feeding hopper 12 is provided with a feeding valve 13.
[0023] During operation, the lower end of the forming die 7 is inserted into the positioning structure of the base 1, and the piston rod of the lifting cylinder 2 is contracted to make the upper pressure cylinder 3 descend, so that the upper port of the forming die 7 is inserted into the insertion hole of the upper pressure cylinder 3, and the sealing ring 11 seals and fills the outer wall of the forming die 7 with the inner wall of the insertion hole of the upper pressure cylinder 3 to improve the sealing effect. The tungsten carbide powder is input into the chamber of the upper pressure cylinder 3 through the feeding hopper 12, and is input into the forming die 7 through the funnel at the lower part of the chamber of the upper pressure cylinder 3 to achieve efficient filling of the tungsten carbide powder. After the filling is completed, the feeding valve 13 closes the lower end of the feeding hopper 12. Before pressing the tungsten carbide powder, the vibration motor 10 runs to vibrate the upper pressure cylinder 3 and the forming die 7, so that the tungsten carbide powder in the forming die 7 is more compact and uniform. The vacuum tube 8 is connected to an external vacuum pump, and the vacuum pump is turned on The air in the cavity of the upper pressing cylinder 3 and the forming die 7 is extracted through the vacuum tube 8, and the vacuum degree in the cavity of the upper pressing cylinder 3 is detected by the vacuum meter 9. When the vacuum degree reaches the set value, the valve of the vacuum tube 8 is closed, and the piston rod of the pressing cylinder 4 is extended to push the vertical axis 5 and the piston pressing plate 6 downward, so that the piston pressing plate 6 enters the upper port of the forming die 7 to press the tungsten carbide powder in the forming die 7. Compared with the prior art, the air in the cavity of the upper pressing cylinder 3 and the forming die 7 is extracted before the tungsten carbide powder is pressed and molded. After the piston pressing plate 6 enters the forming die 7, there is no need to exhaust, and no air will remain between the piston pressing plate 6 and the forming die 7, thereby reducing the residual gap in the tungsten carbide powder in the mold, effectively reducing the defects such as pores in the finished product, and improving the molding quality and practicality.
[0024] Example 2
[0025] like Figures 3 to 6As shown, on the basis of Example 1, it also includes a slide bar 14 and a limit plate 15, the slide bar 14 is installed on the upper pressure cylinder 3, the limit plate 15 is set on the top of the slide bar 14, the diameter of the limit plate 15 is larger than the slide bar 14, the fixed end of the pressing push cylinder 4 is slidably connected with the slide bar 14, and the limit plate 15 limits the pressing push cylinder 4; it also includes a collision block 16 and a lifting assembly, the collision block 16 is slidably installed on the vertical shaft 5, and the lifting assembly is set on the vertical shaft 5. The lifting assembly drives the collision block 16 to rise along the vertical shaft 5 and then fall to hit the piston pressure plate 6. The lifting assembly includes a screw 17, a motor 18, an unlocking plate group 19, two semi-threaded sleeves 20 and a special-shaped block 21, the screw 17 is vertically rotatably installed on the piston pressure plate 6, the motor 18 is installed on the vertical shaft 5 through a bracket, the output shaft of the motor 18 is transmission-connected with the screw 17, the unlocking plate group 19 is installed at the lower part of the bracket, and the unlocking plate group 19 Downward push rods are provided on both sides, a downward wedge block is provided in the middle of the unlocking plate group 19, and a mounting slot is provided on the impact block 16. Two half-threaded sleeves 20 are relatively horizontally slidably installed on the upper part of the mounting slot of the impact block 16, and threads matching the screw 17 are provided on the opposite surfaces of the two half-threaded sleeves 20. The inner edges of the upper ends of the two half-threaded sleeves 20 are provided with inclined surfaces matching the wedge blocks of the unlocking plate group 19, and the lower outer edges of the two half-threaded sleeves 20 are provided with guiding inclined surfaces. The special-shaped block 21 is slidably installed in the lower part of the mounting slot of the impact block 16, and top plates are provided on both sides of the special-shaped block 21. The two top plates extend above the impact block 16 along the two side edges of the mounting slot of the impact block 16 respectively, and the two top plates are aligned with the two push rods of the unlocking plate group 19. Two pushing surfaces matching the guiding inclined surfaces of the two half-threaded sleeves 20 are provided in the middle of the special-shaped block 21.
[0026] The pressing push cylinder 4 is lifted and lowered on the upper part of the upper pressing cylinder 3 by the sliding rod 14 and the limiting plate 15. The limiting plate 15 limits the lifting and lowering of the pressing push cylinder 4. When the piston rod of the pressing push cylinder 4 is extended to push the vertical shaft 5 and the piston pressure plate 6 to descend to press and form the tungsten carbide powder in the forming die 7, the pressing push cylinder 4 is raised under the action of the reaction force and is limited and blocked by the limiting plate 15 to achieve a certain buffering effect. When the piston rod of the pressing push cylinder 4 is extended to push the vertical shaft 5 and the piston pressure plate 6 to press and form the tungsten carbide powder in the forming die 7, the fixed end of the pressing push cylinder 4 reaches the high position of the sliding rod 14 and is limited and blocked by the limiting plate 15. When the tungsten carbide powder in the forming die 7 needs to be compacted, when the impact block 16 falls on the piston pressure plate 6, the special-shaped block 21 is pressed into the mounting slot of the impact block 16, so that the pushing surface of the special-shaped block 21 pushes the two half-threaded sleeves 20 inward to push the clamping screw 17, so that the threads of the two half-threaded sleeves 20 are aligned with the screw 17. The threads are engaged, and the motor 18 drives the screw 17 to rotate. The threads of the screw 17 and the two half-threaded sleeves 20 lift the impact block 16. When the two push rods of the unlocking plate group 19 are aligned with the top plates of the special-shaped block 21 respectively, the impact block 16 continues to rise, thereby pushing the special-shaped block 21 to the lower part of the mounting slot of the impact block 16, so that the two pushing surfaces of the special-shaped block 21 are disengaged from the guiding inclined surfaces of the two half-threaded sleeves 20. The impact block 16 continues to rise so that the wedge block of the unlocking plate group 19 pushes the two half-threaded sleeves 20 to both sides through the inclined surfaces of the two half-threaded sleeves 20, so that the two half-threaded sleeves 20 loosen the screw 17. At this time, the impact block 16 naturally falls and hits the piston pressure plate 6. The above operation is repeated, so that the piston pressure plate 6 compacts the tungsten carbide powder in the forming die 7 again, thereby improving the pressing and molding quality of the tungsten carbide powder. During the compaction process, the fixed end of the pressing push cylinder 4 gradually descends along the slide rod 14.
[0027] like Figures 1 to 6As shown, a tungsten carbide powder pressing and molding device of the utility model, when working, firstly, the lower end of the molding die 7 is inserted into the positioning structure of the base 1, and the piston rod of the lifting push cylinder 2 is contracted to make the upper pressing cylinder 3 descend, so that the upper port of the molding die 7 is inserted into the jack of the upper pressing cylinder 3, and the tungsten carbide powder is input into the chamber of the upper pressing cylinder 3 through the feeding hopper 12, and is input into the molding die 7 through the funnel at the lower part of the chamber of the upper pressing cylinder 3, and then the vacuum tube 8 is connected to the external vacuum pump, and the vacuum pump is turned on to extract the air in the chamber of the upper pressing cylinder 3 and the molding die 7 through the vacuum tube 8, and the vacuum degree in the chamber of the upper pressing cylinder 3 is detected by the vacuum meter 9. When the vacuum degree reaches the set value, the valve of the vacuum tube 8 is closed, and then the piston rod of the pressing push cylinder 4 is extended to push the vertical shaft 5 and the piston plate 6 downward, so that the piston plate 6 enters the molding die 7 The tungsten carbide powder in the forming die 7 is pressed and formed in the upper port. At this time, the fixed end of the pressing push cylinder 4 reaches the high position of the slide rod 14 and is blocked by the limit plate 15. The lifting assembly drives the impact block 16 to rise along the vertical axis 5 and then releases it, so that the impact block 16 falls and hits the piston pressure plate 6. The above operation is repeated, so that the piston pressure plate 6 compacts the tungsten carbide powder in the forming die 7 again. During the compaction process, the fixed end of the pressing push cylinder 4 gradually descends along the slide rod 14. Finally, the compaction is completed, the piston rod of the pressing push cylinder 4 contracts to remove the piston pressure plate 6 from the forming die 7, and the feeding valve 13 is opened to inflate the chamber of the upper pressing cylinder 3 through the feeding hopper 12. The piston rod of the lifting push cylinder 2 is extended to push the upper pressing cylinder 3 to rise, so that the upper end of the forming die 7 is disengaged from the jack of the upper pressing cylinder 3, and the forming die 7 can be taken out from the base 1.
[0028] The main functions achieved by this utility model are:
[0029] 1. By vacuuming and exhausting in advance, the defects such as pores in tungsten carbide powder can be reduced and the molding quality can be improved;
[0030] 2. It can compact tungsten carbide powder and improve the quality of pressing.
[0031] 3. It can realize efficient filling of tungsten carbide powder.
[0032] The utility model is a tungsten carbide powder pressing and molding device, and its installation method, connection method or setting method are all common mechanical methods, and can be implemented as long as it can achieve its beneficial effects; the lifting push cylinder 2, pressing push cylinder 4, vertical shaft 5, piston pressure plate 6, molding die 7, vacuum gauge 9, sealing ring 11, vibration motor 10, feeding hopper 12, feeding valve 13, sliding rod 14, impact block 16, screw 17, and motor 18 of the tungsten carbide powder pressing and molding device of the utility model are purchased on the market, and technical personnel in the industry only need to install and operate them according to the accompanying instruction manual, without the need for technical personnel in this field to pay creative labor.
[0033] All technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A tungsten carbide powder pressing and molding device, comprising a base (1), a lifting push cylinder (2), an upper pressing cylinder (3) and a pressing push cylinder (4), wherein the fixed end of the lifting push cylinder (2) is mounted on the base (1), the upper pressing cylinder (3) is mounted on the piston rod of the lifting push cylinder (2), a chamber is arranged inside the upper pressing cylinder (3), and the fixed end of the pressing push cylinder (4) is mounted on the upper pressing cylinder (3); characterized in that: It also includes a vertical shaft (5), a piston pressure plate (6), a forming die (7), a vacuum tube (8) and a vacuum gauge (9); a mold positioning structure is arranged in the middle of the base (1); a mold plug hole connected to the chamber is arranged in the lower part of the upper pressure cylinder (3); the plug hole is concentric with the positioning structure of the base (1); the upper end of the vertical shaft (5) is connected to the lower end of the piston rod of the pressing cylinder (4); the middle part of the vertical shaft (5) is sealingly slidably connected to the top of the upper pressure cylinder (3); the lower end of the vertical shaft (5) is installed with a piston pressure plate (6); the piston pressure plate (6) is located in the chamber of the upper pressure cylinder (3); the lower end of the forming die (7) is detachably inserted into the positioning structure of the base (1); the upper port of the forming die (7) is detachably sealedly inserted into the plug hole of the upper pressure cylinder (3); the vacuum tube (8) is installed on the upper pressure cylinder (3); the vacuum tube (8) is connected to the chamber of the upper pressure cylinder (3); a valve and a vacuum gauge (9) are arranged on the vacuum tube (8).
2. A tungsten carbide powder compacting device as claimed in claim 1, characterized in that: It also includes a vibration motor (10), which is mounted on the upper pressing cylinder (3).
3. A tungsten carbide powder compacting device as claimed in claim 1, characterized in that: It also comprises a sealing ring (11), and the sealing ring (11) is arranged on the inner wall of the insertion hole of the upper pressure cylinder (3).
4. A tungsten carbide powder compacting device as claimed in claim 1, characterized in that: It also includes a feeding hopper (12) and a feeding valve (13), the lower end of the feeding hopper (12) extends into the chamber of the upper pressure cylinder (3), the lower part of the chamber of the upper pressure cylinder (3) is funnel-shaped, the bottom of the funnel is aligned with the upper end of the insertion hole of the upper pressure cylinder (3), and the feeding valve (13) is arranged at the lower end of the feeding hopper (12).
5. A tungsten carbide powder compacting device as claimed in claim 1, characterized in that: It also includes a slide bar (14) and a limit plate (15), wherein the slide bar (14) is mounted on the upper pressing cylinder (3), the limit plate (15) is arranged on the top of the slide bar (14), the diameter of the limit plate (15) is larger than the slide bar (14), the fixed end of the pressing push cylinder (4) is slidably connected to the slide bar (14), and the limit plate (15) limits the pressing push cylinder (4).
6. A tungsten carbide powder compacting device as claimed in claim 5, characterized in that: It also comprises a striking block (16) and a lifting assembly. The striking block (16) is slidably mounted on the vertical shaft (5). The lifting assembly is arranged on the vertical shaft (5). The lifting assembly drives the striking block (16) to rise along the vertical shaft (5) and then fall to strike the piston pressure plate (6).
7. A tungsten carbide powder compacting device as claimed in claim 6, characterized in that: The lifting assembly comprises a screw rod (17), a motor (18), an unlocking plate group (19), two semi-threaded sleeves (20) and a special-shaped block (21), wherein the screw rod (17) is vertically rotatably mounted on a piston pressure plate (6), the motor (18) is mounted on a vertical shaft (5) through a bracket, the output shaft of the motor (18) is transmission-connected with the screw rod (17), the unlocking plate group (19) is mounted at the lower part of the bracket, downward push rods are arranged on both sides of the unlocking plate group (19), a downward wedge-shaped block is arranged in the middle of the unlocking plate group (19), a mounting slot is arranged on the impact block (16), the two semi-threaded sleeves (20) are relatively horizontally slidably mounted on the upper part of the mounting slot of the impact block (16), and the two semi-threaded sleeves (20) are relatively horizontally slidably mounted on the upper part of the mounting slot of the impact block (16), and the two semi-threaded sleeves (20) are relatively horizontally slidably mounted on the upper part of the mounting slot of the impact block (16). The two semi-threaded sleeves (20) are provided with threads matching the screw rod (17) on the opposite surface, the inner edges of the upper ends of the two semi-threaded sleeves (20) are provided with inclined surfaces matching the wedge blocks of the unlocking plate group (19), the outer edges of the lower ends of the two semi-threaded sleeves (20) are provided with guiding inclined surfaces, the special-shaped block (21) is slidably installed at the lower part of the installation slot hole of the impact block (16), and top plates are provided on both sides of the special-shaped block (21), and the two top plates extend above the impact block (16) along the two side edges of the installation slot hole of the impact block (16), and the two top plates are aligned with the two push rods of the unlocking plate group (19), and two pushing surfaces matching the guiding inclined surfaces of the two semi-threaded sleeves (20) are provided in the middle of the special-shaped block (21).
Citation Information
Patent Citations
Full-automatic tungsten carbide and titanium carbide powder hydraulic machine
CN109822964A