A tungsten powder compacting system for processing tungsten precision tool blanks

Abstract

The present invention relates to the technical field of metal powder compacting equipment, and discloses a tungsten powder pressing and forming system for processing tungsten precision tool blanks, comprising a stamping part, the stamping part being engaged and connected with a die, the stamping part comprising a punch with a trapezoidal design, a rubber strip in contact with the inner wall of the die being provided at the upper end of the side of the punch, the side of the punch being provided with a sealing structure, the sealing structure comprising a movable groove, an arc-shaped plate being embedded in the movable groove in an initial state, the inner wall of the arc-shaped plate being in contact with the outer surface of the circular shaft of the eccentric wheel. The invention is provided with an eccentric wheel, and the trapezoidal punch is wide at the top and narrow at the bottom. The rotation of the eccentric wheel can increase the bottom end area of ​​the punch, so that the punch can better adapt to different pressing requirements. During the pressing process, by changing the contact area between the punch and the die, a more uniform pressure can be applied to the tungsten powder, which helps to improve the density uniformity and quality stability of the pressed product.

Description

Technical Field

[0001] The invention relates to the technical field of metal powder compacting equipment, in particular to a tungsten powder compacting and forming system for processing tungsten precision tool blanks. Background Art

[0002] Powder metallurgy is an industrial technology that produces metal materials, composite materials, and various types of products by forming and sintering metal powders or using them as raw materials. Tungsten powder is mixed with other additives and then precisely pressed into tool blanks with specific shapes and dimensional accuracy. The tightly packed tungsten powder particles lay the foundation for subsequent processing and manufacturing.

[0003] In actual production, when the punch presses down on the die carrying tungsten powder, some tungsten powder will be ejected from the die gap due to factors such as mold processing accuracy limitations, assembly gaps, and suboptimal pressing process parameters. The ejected powder mainly comes from the edge area of ​​the mold cavity, resulting in a decrease in the local powder density in this area, causing the blank to present an uneven structure with low density at the edge and high density in the center after pressing. This density gradient will induce warping or cracking defects due to differential shrinkage during the subsequent sintering process. In addition, the ejected powder adheres to the upper surface of the mold, which will increase the friction between the mold and the blank during the output link after the blank is formed, interfering with the demolding process. Summary of the Invention

[0004] Technical problems solved

[0005] In response to the above-mentioned shortcomings of the prior art, the present invention provides a tungsten powder pressing and molding system for processing tungsten precision tool blanks, which can effectively solve the problem in the prior art that powder at the edge of the mold cavity is easily ejected through the mold gap during the pressing process.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a tungsten powder pressing and forming system for processing tungsten precision tool blanks.

[0008] include:

[0009] Concave die;

[0010] A stamping part, wherein the stamping part is engaged with the die, the stamping part comprises a trapezoidal punch, a rubber strip in contact with the inner wall of the die is provided at the upper end of the side of the punch, and a sealing structure is provided on the side of the punch;

[0011] A pressing mechanism, the pressing mechanism being located at the top of the stamping part;

[0012] The sealing structure includes a movable groove, in the initial state, an arc-shaped plate is embedded in the movable groove, the inner wall of the arc-shaped plate is in contact with the outer surface of the eccentric shaft, and an inclined wedge plate is provided at the bottom end of the eccentric wheel. The movement of the inclined wedge plate drives the eccentric wheel to rotate, and the eccentric wheel exerts an action on the arc-shaped plate to move it out from the inner wall of the punch and close to the inner wall of the die;

[0013] Wherein, the sealing structure further includes a side plate fixed to the bottom end of the outer wall of the arc-shaped plate, and the side plates move with the arc-shaped plate until they are in contact with each other.

[0014] Furthermore, a positioning groove is opened at the upper end of the inner part of the die, and a sealing member is provided on the inner wall of the positioning groove. The sealing member includes a fixed shaft hingedly connected to the side of the inner wall of the positioning groove, and a fixed plate is fixedly connected to the outer wall of the fixed shaft, and a sealing strip is provided on the side of the fixed plate.

[0015] Furthermore, the pressing mechanism includes a pressure frame electrically connected to a sensor inside the rubber strip, and a pressure plate fixedly connected to the bottom end of the pressure frame and in contact with the side of the inclined wedge plate.

[0016] Furthermore, a sliding groove symmetrically opened at the top of the punch is slidably connected to the pressure plate, and a groove is opened at the bottom of the sliding groove to facilitate the movement of the inclined wedge plate, and the inclined wedge plate adopts a design with a symmetrical tilted top.

[0017] Furthermore, movable shafts are fixedly connected to both ends of the arc-shaped plate, and the movable shafts are slidably connected to the grooves provided on the inner wall of the punch, and the grooves are composed of transverse grooves and oblique grooves.

[0018] Furthermore, a fixing bracket is provided on the outer wall of the movable shaft, and a telescopic spring is provided on a side of the fixing bracket close to the slide groove.

[0019] Furthermore, the side edges of the side panels are designed with beveled edges, and the beveled surfaces are provided with flexible layers. The heights of adjacent side panels are different, and the heights of symmetrical side panels are the same.

[0020] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0021] The present invention is equipped with an eccentric wheel and a trapezoidal punch with a wide top and narrow bottom. Rotating the eccentric wheel can increase the bottom area of ​​the punch, making the punch more adaptable to different pressing requirements. During the pressing process, by changing the contact area between the punch and the die, more uniform pressure can be applied to the tungsten powder, helping to improve the density uniformity and quality stability of the pressed product.

[0022] The rotation of the eccentric wheel can drive the sealing structure to move, so that the sealing structure can better fit the inner wall of the die, forming a good sealing effect, preventing tungsten powder from leaking from the gap between the punch and the die during the pressing process, ensuring the cleanliness of the pressing environment, and also avoiding material waste and equipment pollution caused by tungsten powder leakage;

[0023] During the rotation of the eccentric wheel, its side can rub and clean the bottom of the sealing strip at the upper end of the inner wall of the die. This function can promptly remove the tungsten powder particles attached to the sealing strip, prevent the accumulation of tungsten powder from affecting the sealing effect, extend the service life of the sealing strip, and thus ensure the reliability and stability of the entire sealing system;

[0024] After the pressing is completed, the eccentric wheel returns to its initial position when the punch rises, so that the lower position of the punch returns to its original position, reducing the contact area and friction between the punch and the pressed product, making it easier for the punch to be removed from the pressed product, and reducing the risk of cracks, deformation or surface damage to the blank due to excessive demoulding force, which is beneficial to improving the yield and quality of the blank. It also makes it easier to disassemble the mold and subsequent maintenance work, thereby improving production efficiency and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0026] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the separation of the concave and convex mold structures according to an embodiment of the present invention;

[0028] Figure 3 Schematic diagram of the die structure of an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the sealing structure of an embodiment of the present invention;

[0030] Figure 5 Schematic diagram of the male mold structure according to an embodiment of the present invention;

[0031] Figure 6 Schematic cross-sectional view of the internal structure of the punch according to an embodiment of the present invention;

[0032] Figure 7 Schematic diagram of the curved plate structure according to an embodiment of the present invention.

[0033] The numbers in the figure represent: 1. die; 11. positioning groove; 12. sealing part; 121. sealing strip; 122. fixed plate; 123. fixed shaft; 2. stamping part; 21. punch; 22. rubber strip; 23. sealing structure; 231. movable groove; 232. arc plate; 233. side plate; 234. fixing frame; 235. telescopic spring; 236. movable shaft; 237. eccentric wheel; 238. inclined wedge plate; 24. slide groove; 25. groove; 3. pressing mechanism; 31. pressure frame; 32. pressure plate. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] The present invention will be further described below with reference to the embodiments.

[0036] Example:

[0037] See also Figure 1-Figure 7 The present invention provides a technical solution for a tungsten powder compacting system for processing tungsten precision tool blanks:

[0038] refer to Figure 1 and Figure 2 The device includes a stamping part 2, a die 1 and a pressing mechanism 3. The pressing mechanism 3 is located at the top of the stamping part 2. The pressing mechanism 3 includes a pressure frame 31. The bottom end of the pressure frame 31 is fixedly connected to a pressure plate 32. The stamping part 2 is engaged with the die 1. The stamping part 2 includes a trapezoidal punch 21. The upper end of the side of the punch 21 is provided with a rubber strip 22 that contacts the inner wall of the die 1. A sensor is provided inside the rubber strip 22 to control the movement of the pressure frame 31 when it is subjected to pressure. A sealing structure 23 is provided on the side of the punch 21.

[0039] refer to Figure 5 、 Figure 6 and Figure 7The sealing structure 23 includes a movable groove 231. In the initial state, an arc-shaped plate 232 is embedded in the movable groove 231. The inner wall of the arc-shaped plate 232 fits the outer surface of the circular shaft of the eccentric wheel 237. An inclined wedge plate 238 is provided at the bottom end of the eccentric wheel 237. The inclined wedge plate 238 adopts a symmetrically inclined design at the top. The movement of the inclined wedge plate 238 drives the eccentric wheel 237 to rotate. The eccentric wheel 237 exerts an action on the arc-shaped plate 232 to move it out from the inner wall of the punch 21 and close to the inner wall of the die 1. The two ends of the arc-shaped plate 232 are fixedly connected with movable shafts 236. The movable shaft 236 is slidably connected to the groove 25 opened on the inner wall of the punch 21. The groove 25 consists of a transverse groove and an inclined groove.

[0040] The sealing structure 23 also includes a side plate 233 fixed to the bottom end of the outer wall of the arc plate 232. The side plates 233 move with the arc plate 232 until they fit together. The side edges of the side plates 233 are designed with bevel edges, and the bevels are provided with a flexible layer. The heights of adjacent side plates 233 are different, while the symmetrical side plates 233 have the same height. The top of the punch 21 is symmetrically provided with a slide groove 24 that is slidably connected to the pressure plate 32. The lower part of the slide groove 24 is provided with a groove that facilitates the movement of the inclined wedge plate 238. The outer wall of the movable shaft 236 is provided with a fixing frame 234. A telescopic spring 235 is provided on the side of the fixing frame 234 close to the slide groove 24.

[0041] During use, the bottom of the punch 21 contacts the tungsten powder, slowly compacting it. The side seal 12 adheres to the sidewall of the punch 21, forming a preliminary sealing barrier that prevents small amounts of tungsten powder from entering the gap during the descent of the punch 21. When the punch 21 first contacts the tungsten powder, the tungsten powder is unlikely to be ejected. At this point, the pressure of the punch 21 on the tungsten powder has not yet formed a significant squeezing effect. The external forces acting on the tungsten powder are primarily the weight of the punch 21 and the initial slight contact pressure. The significant pressure differential and flow tendency sufficient to force the tungsten powder out of the die gap have not yet formed. Furthermore, the tungsten powder is relatively loosely distributed within the die 1 at this point. The friction and cohesive forces between the particles still maintain the overall stability of the powder to a certain extent, preventing it from ejecting from the gap.

[0042] However, in the prior art, as the punch 21 begins to slowly move downward, entering the early stages of compaction, the pressure on the tungsten powder gradually increases, the air between the powders is gradually expelled, and the tungsten powder begins to be compressed. At this stage, when the pressure reaches a certain level, the tungsten powder may begin to eject from the gap between the dies. This is because as the pressure increases, the friction and cohesion between the tungsten powder particles gradually become unable to resist external forces, and relative sliding and flow begin to occur, making tungsten powder ejection more likely in the early stages of compaction. In the later stages of compaction, the tungsten powder has been compressed to a higher density, and the gaps between the particles become smaller. In theory, the possibility of tungsten powder ejection is reduced. At this time, it is more important to fully compact the tungsten powder. Therefore, in order to reduce the splashing of tungsten powder during the compaction process, the present invention adopts a sealing structure 23 to seal the gap between the die 1 and the punch 21.

[0043] Before pressing, the punch 21 is in its upper initial position, and the eccentric wheel 237 is in its initial state. At this point, the bottom and side areas of the punch 21 are relatively small, allowing it to smoothly enter the die 1 without generating severe friction with the tungsten powder. The side sealing structure 23 fits against the sidewalls of the punch 21, forming a preliminary sealing barrier to prevent a small amount of tungsten powder from entering the gap during the descent of the punch 21. When the punch 21 descends close to the tungsten powder, the rubber strip 22 contacts the seal 12, causing the sensor within the seal 12 to drive the pressure frame 31 downward. The pressure frame 31 then drives the pressure plate 32 downward, which applies force to the wedge plate 238. The force on the wedge plate 238 pushes the eccentric wheel 237 to begin rotating.

[0044] Different from the structure with overall rigid connection, the linkage between the above structures can reduce direct force during the pressing process and avoid damage. In addition to the fixed frame 234, there is also an eccentric wheel 237. When the bottom end of the arc plate 232 is parallel to the bottom surface of the punch 21 for compaction operation, the eccentric wheel 237 can also apply force to the arc plate 232 to prevent the arc plate 232 from moving upward under force.

[0045] The rotation of the eccentric wheel 237 causes the arc plate 232 to gradually move from a state of being completely embedded in the movable groove 231 to the outside of the movable groove 231. The arc plate 232 fills the gap between the punch 21 and the die 1, further reducing the gap. Specifically, the protruding portion of the eccentric wheel 237 gradually expands outward, filling the gap between the punch 21 and the die 1, and enhancing the sealing effect. At the same time, while the eccentric wheel 237 rotates to expand the sealing area, its contour dynamically scrapes the sealing strip 121 on the inner wall of the die 1, and the relative displacement generated by the eccentric distance is continuously removed from the surface of the sealing strip 121. This cleaning process is carried out synchronously with the pressing action. Through the periodic movement of the eccentric wheel 237, the real-time self-cleaning of the sealing structure 23 is achieved, avoiding sealing failure and mold adhesion caused by powder accumulation, effectively extending the service life of the mold, reducing the frequency of manual cleaning, and improving production efficiency.

[0046] After eccentric wheel 237 rotates into position, its bottom surface and seal 12 on the side of die 1 form a gradient sealing interface. This structure effectively eliminates the powder leakage problem caused by mold gaps in traditional static seals. Through precise angle control of eccentric wheel 237, quantitative adjustment of the sealing area is achieved. Even under high-pressure pressing conditions, the micro-gap sealing accuracy can be maintained, ensuring that tungsten powder does not overflow laterally during the compression process, significantly improving the density uniformity and dimensional consistency of the formed blank. As punch 21 continues to press downward, the increased area of ​​punch 21 subjects the tungsten powder to uniform and stable pressure, reducing the problem of powder extrusion caused by uneven pressure. The sealing structure 23 and eccentric wheel 237 work together to effectively prevent tungsten powder from being ejected from the gap.

[0047] The punch 21 adopts a trapezoidal design that is narrow at the bottom and wide at the top. The narrow end of the trapezoidal punch 21 contacts the tungsten powder first, which can play a good guiding and positioning role, so that the punch 21 can be more accurately aligned with the tungsten powder in the die 1, reducing the uneven distribution of tungsten powder or mold damage caused by positioning deviation; and because the narrow end contacts first, compared with the flat punch 21, under the same pressure, the narrow end of the trapezoidal punch 21 has a smaller contact area with the tungsten powder and a larger pressure per unit area, which can make the tungsten powder subject to a larger local pressure in the initial stage, which helps to initially compact the tungsten powder and make it easier to distribute evenly in the subsequent pressing process. At the same time, it can also reduce the possibility of tungsten powder splashing around during the initial pressing.

[0048] As punch 21 presses downward, the trapezoidal sides gradually come into contact with the tungsten powder, increasing the contact area. The pressure on the tungsten powder is evenly distributed to more areas, achieving gradual compaction of the tungsten powder. This gradual compaction method avoids excessive stress concentration within the tungsten powder caused by a sudden increase in pressure, thereby improving the density uniformity and structural stability of the compacted tungsten powder body.

[0049] When the side of the trapezoidal punch 21 contacts the tungsten powder, it will generate a certain lateral force on the tungsten powder, causing the tungsten powder to generate a certain degree of lateral flow in the die 1, which helps to fill every corner of the die 1. Especially for some dies 1 with complex shapes, it can better ensure the uniform filling of tungsten powder in the mold and reduce the formation of pores and defects.

[0050] After the pressing is completed, the eccentric wheel 237 rotates synchronously in the opposite direction when the punch 21 rises, driving the sealing structure 23 to quickly retract to the initial state, so that the lower part of the punch 21 returns to the narrow end shape. This modular shrinkage design significantly reduces the demolding resistance, and the demolding force is reduced compared to the traditional rectangular punch 21. The narrow end shape is combined with the trapezoidal taper to form a natural demolding guide, avoiding friction damage between the blank and the side wall of the mold, and ensuring the surface finish and dimensional accuracy of the formed blank. This structure is controlled by the rotation angle of the eccentric wheel 237, and the sealing area and contact pressure of the punch 21 can be flexibly adjusted. It is compatible with tungsten powder raw materials with different particle size distributions and fluidity, as well as diverse blank forming requirements.

[0051] During the demoulding process, the shape of the trapezoidal punch 21 can also play a certain self-centering role, so that the blank maintains a relatively stable position during demoulding and is not prone to displacement or shaking, which helps to realize automated demoulding operations and improve production efficiency and product consistency.

[0052] This mechanism utilizes the movement of the eccentric wheel 237 on the side of the punch 21. Early in the pressing process, when the punch 21 descends to its upper portion and contacts the sealing strip 121, this movement is captured by a sensor and fed back to the intelligent controller. The controller then issues a command, driving a specific control structure to apply force to the eccentric wheel 237, causing it to begin rotating. This rotation cleverly achieves dynamic filling of the gap between the punch 21 and the die 1, ensuring a well-sealed environment during the pressing process and effectively preventing tungsten powder leakage.

[0053] When the arc plate 232 moves to the edge of the groove 25 of the punch 21, it moves downward a certain distance. At this time, the bottom end of the arc plate 232 is flush with the bottom end of the punch 21, and the arc plate 232 drives the side plate 233 to move. The side edge of the side plate 233 adopts a bevel design, and the bevel is provided with a flexible layer. When the arc plate 232 moves downward, it drives the side plate 233 to move downward. The heights of adjacent side plates 233 are different, and the symmetrical side edges have the same height. At the same time, the corresponding groove 25 edge position heights are also matched therewith. The side plate 233 is high, the groove 25 has a larger depth and a smaller slope. The side plate 233 is low, the groove 25 has a smaller depth and a larger slope. When it moves downward, During the process, the side panel 233 at a low position can quickly move to a position flush with the bottom surface of the punch 21 due to its small depth and large slope. After the side panel 233 at a low position moves to the corresponding position, the side panel 233 at a high position will move to the corresponding position due to its large depth. On the contrary, during the upward movement of the side panel 233 at a low position, it takes a long time to move to the initial position due to its large slope. At this time, the side panel 233 at a high position moves quickly to the initial position due to its small slope. Under the action of the same driving force, the side panels 233 at different heights are recovered, and due to the different recovery speeds, there is no motion interference between them.

[0054] The eccentric wheel 237 rotates inside the punch 21, and its eccentric part gradually squeezes the upper part of the arc plate 232. The arc plate 232 overcomes the friction and moves toward the side of the die 1. The arc plate 232 drives the movable shaft 236 to slide along the groove 25. The arc plate 232 moves downward under the restriction of the fixing frame 234 until it reaches a suitable position. The bottom end of the fixing frame 234 is flush with the bottom surface of the punch 21, thereby increasing the area of ​​the bottom end of the punch 21. After the pressing is completed, the eccentric wheel 237 is not restricted and returns to its original position under the push of gravity and the arc plate 232. At the same time, the arc plate 232 returns to its initial position under the action of the telescopic spring 235.

[0055] Through precise gap filling and good sealing performance, the leakage of tungsten powder and the problems of pores and defects inside the blank are reduced, the density uniformity and dimensional accuracy of the product are improved, thereby improving the overall quality of the product.

[0056] refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A positioning groove 11 is provided at the upper end of the inner part of the die 1, and a sealing member 12 is provided on the inner wall of the positioning groove 11. The sealing member 12 includes a fixed shaft 123 hingedly connected to the side of the inner wall of the positioning groove 11, and a fixed plate 122 is fixedly connected to the outer wall of the fixed shaft 123. A sealing strip 121 is provided on the side of the fixed plate 122.

[0057] After the pressing process is completed, the punch 21 moves upward. When it contacts the sealing strip 121 again, the sensor senses this movement again and transmits it to the intelligent controller. The controller responds quickly, and the eccentric wheel 237 then rotates in the opposite direction. When the eccentric wheel 237 moves in the opposite direction, its contour interacts with the lower end of the sealing strip 121, generating an upward thrust, causing the sealing strip 121 and the fixed plate 122 fixed to it to rotate upward synchronously. This action not only significantly increases the space above the die 1, providing ample space for demolding operations and reducing the difficulty of demolding, but also moves the sealing strip 121 out of the die 1 to an area that is easy to clean, facilitating timely cleaning and maintenance of the sealing strip 121 and ensuring the long-term stability of the sealing performance.

[0058] The convenient demoulding design and easy cleaning and maintenance features reduce demoulding time and mold maintenance time, reduce equipment downtime, improve production efficiency, and reduce production costs. It also reduces tungsten powder contamination of molds and equipment, reduces mold wear and corrosion, extends the service life of molds and equipment, and reduces equipment repair and replacement costs.

[0059] The operator can easily clean and inspect the sealing strip 121 removed from the die 1 to remove the attached tungsten powder particles and ensure good sealing performance. After cleaning, wait for the next pressing cycle.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A tungsten powder compacting system for processing tungsten precision tool blanks, characterized in that: include: Concave die (1); A stamping part (2), the stamping part (2) being engaged with the die (1), the stamping part (2) comprising a trapezoidal-shaped punch (21), a rubber strip (22) in contact with the inner wall of the die (1) being provided at the upper end of the side of the punch (21), and a sealing structure (23) being provided on the side of the punch (21); A pressing mechanism (3), the pressing mechanism (3) being located at the top end of the stamping part (2); The sealing structure (23) includes a movable groove (231), wherein an arc-shaped plate (232) is embedded in the movable groove (231) in an initial state, wherein the inner wall of the arc-shaped plate (232) is in contact with the outer surface of the circular shaft of the eccentric wheel (237), and an inclined wedge plate (238) is provided at the bottom end of the eccentric wheel (237), wherein the inclined wedge plate (238) moves to drive the eccentric wheel (237) to rotate, and the eccentric wheel (237) exerts an action on the arc-shaped plate (232) to move it out from the inner wall of the punch (21) and approach the inner wall of the die (1); The sealing structure (23) further comprises a side plate (233) fixed to the bottom end of the outer wall of the arc-shaped plate (232), and the side plate (233) moves with the arc-shaped plate (232) to fit each other.

2. The tungsten powder compacting system for processing tungsten precision tool blanks according to claim 1 is characterized in that: A positioning groove (11) is provided at the upper end of the inner portion of the die (1), a sealing member (12) is provided on the inner wall of the positioning groove (11), the sealing member (12) comprises a fixed shaft (123) hingedly connected to the side of the inner wall of the positioning groove (11), a fixed plate (122) is fixedly connected to the outer wall of the fixed shaft (123), and a sealing strip (121) is provided on the side of the fixed plate (122).

3. The tungsten powder compacting system for processing tungsten precision tool blanks according to claim 1 is characterized in that: The pressing mechanism (3) comprises a pressure frame (31) electrically connected to the rubber strip (22), and a pressure plate (32) is fixedly connected to the bottom end of the pressure frame (31) and is in contact with the side of the inclined wedge plate (238).

4. The tungsten powder compacting system for processing tungsten precision tool blanks according to claim 3, characterized in that: The top of the punch (21) is symmetrically provided with a slide groove (24) that is slidably connected to the pressure plate (32). The lower portion of the slide groove (24) is provided with a groove that facilitates the movement of the inclined wedge plate (238). The inclined wedge plate (238) is designed with a symmetrically inclined top.

5. The tungsten powder compacting system for processing tungsten precision tool blanks according to claim 1, characterized in that: The two ends of the arc-shaped plate (232) are fixedly connected with movable shafts (236), and the movable shafts (236) are slidably connected to the grooves (25) provided on the inner wall of the punch (21), and the grooves (25) are composed of transverse grooves and oblique grooves.

6. The tungsten powder compacting system for processing tungsten precision tool blanks according to claim 5, characterized in that: A fixing frame (234) is provided on the outer wall of the movable shaft (236), and a telescopic spring (235) is provided on a side of the fixing frame (234) close to the slide groove (24).

7. The tungsten powder compacting system for processing tungsten precision tool blanks according to claim 1, characterized in that: The side edges of the side panels (233) are designed with beveled edges, and the beveled surfaces are provided with flexible layers. The heights of adjacent side panels (233) are different, and the heights of symmetrical side panels (233) are the same.

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