A preparation method of an alumina ceramic numerical control cutter

Abstract

This invention belongs to the field of alumina ceramic technology, and in particular, a method for preparing alumina ceramic CNC cutting tools. The method includes step one: screening. High-purity alumina powder is selected, and large particles and impurities are removed. This method for preparing alumina ceramic CNC cutting tools involves setting up a grinding device to grind the screened alumina powder. The synchronous operation of the drive mechanism and the grinding mechanism causes the grinding jar and the ball rod to rotate. Because the rotation speeds of the grinding jar and the drive frame are different, it helps to uniformly mix the materials, ensuring a more uniform material distribution during the grinding process. A filter screen prevents excessively large particles from entering the mixing jar, allowing it to continue grinding and ensuring uniformity. This solves the technical problem that when grinding alumina, insufficiently ground powder needs to be manually screened and ground again, increasing processing time and cost, leading to reduced production efficiency.

Description

Technical Field

[0001] This invention relates to the field of alumina ceramics technology, and in particular to a method for preparing alumina ceramic CNC cutting tools. Background Technology

[0002] Alumina possesses extremely high hardness and wear resistance, making it an ideal material for manufacturing high-performance cutting tools. Its chemical stability allows it to perform exceptionally well in high-temperature and corrosive environments. To improve the performance of alumina ceramics, powder metallurgy processing is typically employed, including uniform mixing of powders, forming (such as pressing or injection molding), and high-temperature sintering. The sintering process transforms the powder into a dense ceramic body, thereby significantly improving its strength and wear resistance.

[0003] Typically, alumina is ground and mixed with sintering aids, then pressed into shape, degreased, and sintered. Finally, it is polished to obtain cutting tools. However, when grinding alumina, insufficiently ground powder needs to be manually screened and ground again, which increases processing time and cost, leading to reduced production efficiency. Moreover, if the mixing with sintering aids is insufficient, the effect of the sintering aids will be reduced, which may lead to pores, cracks, or other defects during sintering, affecting the density and overall quality of the product. Summary of the Invention

[0004] In existing methods for preparing CNC tools for alumina ceramics, insufficiently ground powder requires manual screening and re-grinding, increasing processing time and cost. Furthermore, inadequate mixing with sintering aids reduces the effectiveness of the aids and affects the density of the product. Therefore, this invention proposes a method for preparing CNC tools for alumina ceramics.

[0005] The present invention proposes a method for preparing alumina ceramic CNC cutting tools, comprising step one: screening: selecting high-purity alumina powder and removing large particles and impurities.

[0006] Step 2: Grinding: Place the screened powder into a grinding device and grind the powder.

[0007] Step 3: Mixing: The finely ground alumina powder is mixed evenly with the sintering aid in the grinding equipment.

[0008] Step 4: Molding: Place the powder mixed in Step 3 into a press and press it into shape.

[0009] Step 5: Degreasing: Place the tool that was pressed and shaped in Step 4 under low temperature and heat it to remove the binder and form a degreased blank.

[0010] Step 6: Sintering: Place the degreased cutting tool into the sintering furnace. After sintering, slowly cool it down.

[0011] Step 7: Machining: Rough machining is performed using a CNC lathe, followed by fine machining using a grinding machine, and finally polishing to obtain the cutting tool.

[0012] Preferably, the grinding equipment in step two includes a collection tank with locking rollers, a grinding device, an opening and closing device, and a mixing device.

[0013] The grinding device is located inside the collection tank and grinds the screened alumina powder. The grinding device includes a drive mechanism and a grinding mechanism. The drive mechanism includes a drive frame, and the rotation of the drive frame drives the grinding mechanism to rotate. The grinding mechanism includes a ball rod, and the rotation of the ball rod grinds the alumina powder.

[0014] The opening and closing device is located inside the collection tank and conveys the ground alumina powder into the mixing device. The opening and closing device includes a fan plate and an opening and closing mechanism. The opening and closing mechanism includes a deflection rod, and the deflection of the deflection rod drives the fan plate to open and close.

[0015] The mixing device is located on the inner wall of the collection tank and mixes the sintering aid and the ground alumina powder. The mixing device includes a mixing plate, and the rotation of the mixing plate mixes the sintering aid and the ground alumina powder.

[0016] Preferably, the driving mechanism further includes a motor, which is fixedly mounted on the outer surface of the collection tank. The output shaft of the motor is slidably sleeved with a driving gear, and a driving electromagnet is fixedly mounted on the output shaft of the motor. A driving spring that forces the driving gear to reset is also fixedly mounted on the output shaft of the motor.

[0017] The above technical solution uses a motor to drive the drive gear to rotate, which in turn drives an electromagnet to control the gear's lifting and lowering. A drive spring then resets the drive gear, thus achieving precise control and adjustment.

[0018] Preferably, the outer surface of the collection tank is rotatably connected to the outer surface of the drive frame via a bearing. A rotating gear is fixedly installed on the outer surface of the drive frame. After the drive gear is reset, it meshes with the rotating gear. A drive bevel gear is rotatably connected to the outer surface of the drive frame. A rotating bevel gear is rotatably connected to the outer surface of the drive frame. The rotating bevel gear meshes with the drive bevel gear. A rotating rod is fixedly installed on the outer surface of the rotating bevel gear.

[0019] Through the above technical solution, the electromagnet is de-energized, the drive spring resets the drive gear and meshes with the rotating gear, causing the drive frame to rotate. This drives the rotating bevel gear connected to it to rotate on the drive bevel gear while rotating on its own axis. The rotating bevel gear is fixedly installed with the rotating rod, which can drive the rotating rod to rotate on its own axis while revolving around the revolution. The drive bevel gear provides the rotation trajectory while ensuring the stability of the rotation.

[0020] Preferably, the grinding mechanism further includes a grinding jar, which is rotatably connected to the outer surface of the drive frame. A filter screen is fixedly installed on the inner wall of the grinding jar, and a support rod is rotatably connected to the outer surface of the rotating rod. The outer surface of the support rod is fixedly installed to the outer surface of the grinding jar.

[0021] Through the above technical solution, the grinding tank is rotatably connected to the drive frame. The rotating rod drives the rotating support rod to revolve, thereby driving the grinding tank, which is fixedly installed with the support rod, to rotate. Since the gear ratio of the drive bevel gear and the rotating bevel gear is different, the rotation speed of the grinding tank and the drive frame is different, which helps to uniformly mix the materials and ensures that the material distribution is more uniform during the grinding process. The filter screen prevents excessively large particles from entering the mixing tank and allows them to continue grinding, so as to ensure the uniformity of grinding.

[0022] Preferably, the outer surface of the drive frame is rotatably connected to the inner wall of the groove of the cue stick, a connecting rod is rotatably connected to the outer surface of the cue stick, a moving block is threadedly connected to the outer surface of the drive frame, and the outer surface of the moving block is rotatably connected to the inner wall of the groove of the connecting rod.

[0023] Through the above technical solution, the drive frame is rotatably connected to the cue stick, driving its rotation without affecting its deflection. Since the moving block is threadedly connected to the drive frame, it drives the drive frame to rotate and move. The movement of the moving block causes the connecting rod, which is rotatably connected to the cue stick, to deflect. As the cue stick rotates, the rotation diameter gradually increases from bottom to top. The gradually increasing diameter helps to improve the grinding effect and ensure the uniformity of powder grinding. The rotation of the grinding jar can help to evenly distribute the powder and reduce the problem of insufficient grinding in the bottom area.

[0024] Preferably, the opening and closing mechanism further includes an opening and closing rod, the outer surface of which is rotatably connected to the outer surface of the grinding tank via a support rod, the outer surface of which drives the opening and closing rod to rotate via a bevel gear set, a rotating gear is slidably sleeved on the outer surface of the opening and closing rod, a rotating electromagnet is fixedly installed on the outer surface of the opening and closing rod, and a rotating spring is fixedly installed on the outer surface of the opening and closing rod to force the rotating gear to reset.

[0025] Through the above technical solution, the rotating rod drives the opening and closing rod to rotate through the bevel gear set, which in turn drives the rotating gear that is slidably sleeved with it to rotate. When the rotating electromagnet is energized, the rotating gear meshes with the opening and closing gear and drives it to rotate. When the rotating electromagnet is de-energized, the rotating spring resets the rotating gear and disengages it, so as to accurately control the opening and closing of the fan plate.

[0026] Preferably, a ring is fixedly installed on the outer surface of the grinding jar, and a support ring is slidably inserted into the outer surface of the ring via a support column. A splitting gear is fixedly installed on the outer surface of the support ring. After the rotating gear descends, it meshes with the splitting gear. The outer surface of the support ring is rotatably connected to the inner wall of the groove of the deflection rod. The inner wall of the groove of the deflection rod is rotatably connected to the outer surface of the fan plate. The outer surface of the fan plate is rotatably connected to the inner wall of the groove of the ring.

[0027] Through the above technical solution, the circular ring and the support ring are slidably connected, so the deflection of the support ring does not affect the circular ring. When the rotating electromagnet is energized, the rotating gear meshes with the opening and closing gear, driving it to rotate, which in turn drives the deflection rod connected to it to deflect. Thus, the deflection rod causes the fan plate connected to it to deflect on the circular ring connected to it, so as to control the opening and closing of the fan plate and allow the ground alumina powder to enter the mixing tank.

[0028] Preferably, the mixing device further includes a mixing tank, which is fixedly installed on the inner wall of the collection tank. A fixing rod is fixedly installed on the inner wall of the mixing tank. A support frame is rotatably sleeved on the outer surface of the fixing rod. A rotating block is rotatably connected to the inner wall of the groove of the support frame. A sleeve is fixedly installed on the inner wall of the mixing tank. The sleeve is located outside the fixing rod. The inner wall of the groove of the sleeve is rotatably connected to the outer surface of the mixing plate. The outer surface of the mixing plate is rotatably sleeved on the inner wall of the groove of the rotating block. The outer surface of the mixing plate is rotatably connected to the inner wall of the groove of the mixing tank.

[0029] Through the above technical solution, the fixed rod is rotatably connected to the support frame, which limits its position without affecting its rotation and lifting. The support frame is rotatably connected to the rotating block. The mixing plate, which is rotatably connected to the mixing tank and the casing respectively, drives the support frame to deflect and lift through the rotating block that is rotatably connected to it. Thus, the rotation of one mixing plate drives the rotation of multiple mixing plates.

[0030] Preferably, a mixing rod is rotatably connected to the outer surface of the collection tank, and a mixing gear is fixedly installed on the outer surface of the mixing rod. After the driving gear rises, it meshes with the mixing gear. One end of the mixing rod drives the mixing plate to rotate through a bevel gear set. The outer surfaces of one mixing plate and the outer surfaces of another mixing plate are rotatably connected by a synchronous belt through a synchronous pulley.

[0031] The above technical solution drives the electromagnet to be energized, which drives the gear to rise and mesh with the mixing gear, thereby rotating the mixing rod that is rotatably connected to the collection tank. The mixing rod drives the mixing plate to rotate through the bevel gear set. Since one mixing plate is rotatably connected to another mixing plate and the synchronous belt through the synchronous pulley, the mixing plates are rotated synchronously, so that the alumina powder and sintering aid in the mixing tank can be effectively and uniformly mixed.

[0032] The beneficial effects of this invention are as follows:

[0033] 1. By setting up a grinding device, the screened alumina powder is ground. The motor drives the drive gear to rotate, the drive electromagnet is de-energized, and the drive spring resets the drive gear to mesh with the rotating gear, causing the drive frame to rotate. This causes the rotating bevel gear to rotate on the drive bevel gear it meshes with, while simultaneously rotating on its own axis. The rotating bevel gear drives the rotating rod to rotate on its own axis and revolve around the central axis. The rotating rod drives the support rod to revolve around the central axis, thereby causing the grinding tank to rotate. The filter screen prevents excessively large particles from entering the mixing tank. The moving block is threadedly connected to the drive frame and drives it to rotate and move. The movement of the moving block causes the connecting rod, which is rotatably connected to the ball rod, to deflect. This causes the ball rod to rotate while gradually increasing the rotation diameter from bottom to top. This solves the technical problem that when grinding alumina, insufficiently ground powder needs to be manually screened and ground again, increasing processing time and cost, and leading to reduced production efficiency.

[0034] 2. By setting up an opening and closing device, the ground alumina powder is conveyed into the mixing device. The rotating rod drives the opening and closing rod to rotate through the bevel gear set, which drives the rotating gear that is slidably sleeved with it to rotate. When the rotating electromagnet is energized, the rotating gear meshes with the opening and closing gear and drives it to rotate. When the rotating electromagnet is de-energized, the rotating spring resets the rotating gear and disengages it. When the rotating electromagnet is energized, the rotating gear meshes with the opening and closing gear and drives the support ring to rotate, which drives the deflection rod connected to it to deflect. Thus, the deflection rod causes the fan plate connected to the rotating ring to deflect on the rotating ring, so as to control the opening and closing of the fan plate and allow the ground alumina powder to enter the mixing tank. This solves the technical problem that when grinding alumina, insufficiently ground powder needs to be manually screened and ground again, which increases processing time and cost and leads to reduced production efficiency.

[0035] 3. By setting up a mixing device, the sintering aid and the ground alumina powder are mixed. The fixed rod is rotatably connected to the support frame, and the support frame is rotatably connected to the rotating block. The mixing plate, which is rotatably connected to the mixing tank and the sleeve, drives the support frame to deflect and rise through the rotating block, thereby driving multiple mixing plates to rotate through the rotation of one mixing plate. The driving electromagnet is energized, driving the gear to rise and mesh with the mixing gear, driving the mixing rod, which is rotatably connected to the collection tank, to rotate. The mixing rod drives the mixing plate to rotate through the bevel gear set. Since one mixing plate is rotatably connected to another mixing plate and the synchronous belt through the synchronous pulley, the mixing plates are ensured to rotate synchronously, so that the alumina powder and sintering aid in the mixing tank can be effectively and uniformly mixed. This solves the technical problem that if the mixing is insufficient, the effect of the sintering aid will be reduced, which may lead to pores, cracks or other defects during sintering, affecting the density and overall quality of the product. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a method for preparing alumina ceramic CNC cutting tools proposed in this invention;

[0037] Figure 2 This is a perspective view of the driving electromagnet structure for a method of preparing alumina ceramic CNC cutting tools proposed in this invention.

[0038] Figure 3 This is a perspective view of the drive spring structure for a method of preparing alumina ceramic CNC cutting tools proposed in this invention.

[0039] Figure 4 This is a perspective view of the drive bevel gear structure for a method of preparing alumina ceramic CNC cutting tools proposed in this invention;

[0040] Figure 5 This is a perspective view of the filter screen structure of a method for preparing alumina ceramic CNC cutting tools proposed in this invention;

[0041] Figure 6 This is a perspective view of the ball-and-bar structure of a method for preparing alumina ceramic CNC cutting tools proposed in this invention;

[0042] Figure 7 This is a perspective view of the fan plate structure of a method for preparing alumina ceramic CNC cutting tools proposed in this invention;

[0043] Figure 8 This is a perspective view of the deflection rod structure in a method for preparing alumina ceramic CNC cutting tools proposed in this invention.

[0044] Figure 9 This is a perspective view of the sleeve structure of a method for preparing alumina ceramic CNC cutting tools proposed in this invention;

[0045] Figure 10 This is a perspective view of the fixing rod structure in a method for preparing alumina ceramic CNC cutting tools proposed in this invention.

[0046] Figure 11 This is a perspective view of the support frame structure for a method of preparing alumina ceramic CNC cutting tools proposed in this invention;

[0047] Figure 12 This is a perspective view of the hybrid rod structure of a method for preparing alumina ceramic CNC cutting tools proposed in this invention.

[0048] In the diagram: 1. Collection tank; 2. Motor; 21. Drive gear; 22. Drive electromagnet; 23. Drive spring; 3. Drive frame; 31. Rotating gear; 32. Drive bevel gear; 33. Rotating bevel gear; 34. Rotating rod; 4. Grinding tank; 41. Filter screen; 42. Support rod; 5. Ball rod; 51. Connecting rod; 52. Moving block; 6. Opening / closing rod; 61. Rotating gear; 62. Rotating electromagnet; 63. Rotating spring; 7. Ring; 71. Support ring; 72. Opening / closing gear; 73. Deflecting rod; 74. Fan plate; 8. Mixing tank; 81. Fixed rod; 82. Support frame; 83. Rotating block; 84. Sleeve; 85. Mixing plate; 9. Mixing rod; 91. Mixing gear; 92. Synchronous belt. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0050] A method for preparing alumina ceramic CNC cutting tools includes step one: screening: selecting high-purity alumina powder and removing large particles and impurities.

[0051] Step 2: Grinding: Place the screened powder into a grinding device and grind the powder.

[0052] Step 3: Mixing: The finely ground alumina powder is mixed evenly with the sintering aid in the grinding equipment.

[0053] Step 4: Molding: Place the powder mixed in Step 3 into a press and press it into shape.

[0054] Step 5: Degreasing: Place the tool that was pressed and shaped in Step 4 under low temperature and heat it to remove the binder and form a degreased blank.

[0055] Step 6: Sintering: Place the degreased cutting tool into the sintering furnace. After sintering, slowly cool it down.

[0056] Step 7: Machining: Rough machining is performed using a CNC lathe, followed by fine machining using a grinding machine, and finally polishing to obtain the cutting tool.

[0057] Reference Figures 1-12 The grinding equipment in step two includes a collection tank 1 with locking rollers, a grinding device, an opening and closing device, and a mixing device.

[0058] like Figure 2-6 As shown, a grinding device is provided for grinding the screened alumina powder. The grinding device is located inside the collection tank 1 and grinds the screened alumina powder. The grinding device includes a drive mechanism and a grinding mechanism. The drive mechanism includes a drive frame 3. The rotation of the drive frame 3 drives the grinding mechanism to rotate. The grinding mechanism includes a ball rod 5. The rotation of the ball rod 5 grinds the alumina powder.

[0059] Specifically, in order to achieve precise control and adjustment of the drive gear 21, the drive mechanism also includes a motor 2. The motor 2 is fixedly installed on the outer surface of the collection tank 1. The output shaft of the motor 2 is slidably sleeved with the drive gear 21. The output shaft of the motor 2 is fixedly installed with a drive electromagnet 22. The output shaft of the motor 2 is fixedly installed with a drive spring 23 that forces the drive gear 21 to reset. The motor 2 drives the drive gear 21 to rotate, the drive electromagnet 22 controls the drive gear 21 to rise and fall, and the drive spring 23 resets the drive gear 21 to achieve precise control and adjustment.

[0060] Specifically, in order to provide a rotational trajectory for the rotating bevel gear 33 while ensuring rotational stability, the outer surface of the collection tank 1 and the outer surface of the drive frame 3 are rotatably connected by bearings. A rotating gear 31 is fixedly installed on the outer surface of the drive frame 3. After the drive gear 21 is reset, it meshes with the rotating gear 31. A drive bevel gear 32 and a rotating bevel gear 33 are rotatably connected to the outer surface of the drive frame 3. The rotating bevel gear 33 meshes with the drive bevel gear 32. A rotating rod 34 is fixedly installed on the outer surface of the rotating bevel gear 33. When the drive electromagnet 22 is de-energized, the drive spring 23 resets the drive gear 21 and meshes with the rotating gear 31, causing the drive frame 3 to rotate. This causes the rotating bevel gear 33, which is rotatably connected to it, to rotate on the drive bevel gear 32 while rotating on its own axis. The rotating bevel gear 33 is fixedly installed with the rotating rod 34, which can drive the rotating rod 34 to rotate on its own axis while revolving around the sun. The drive bevel gear 32 provides a rotational trajectory while ensuring rotational stability.

[0061] Specifically, to prevent excessively large particles from entering the mixing tank 8 and continuing grinding to ensure uniform grinding, the grinding mechanism also includes a grinding tank 4. The grinding tank 4 is rotatably connected to the outer surface of the drive frame 3. A filter screen 41 is fixedly installed on the inner wall of the grinding tank 4. A support rod 42 is rotatably connected to the outer surface of the rotating rod 34. The outer surface of the support rod 42 is fixedly installed to the outer surface of the grinding tank 4. The grinding tank 4 is rotatably connected to the drive frame 3. The rotating rod 34 drives the rotatably connected support rod 42 to revolve, thereby driving the grinding tank 4, which is fixedly installed to the support rod 42, to rotate. Since the gear ratio of the drive bevel gear 32 and the rotating bevel gear 33 is different, the rotation speed of the grinding tank 4 and the drive frame 3 is different, which helps to uniformly mix the materials and ensure a more uniform material distribution during the grinding process. The filter screen 41 prevents excessively large particles from entering the mixing tank 8 and continuing grinding to ensure uniform grinding.

[0062] Specifically, to help distribute the powder evenly and reduce the problem of insufficient grinding in the bottom area, the outer surface of the drive frame 3 is rotatably connected to the inner wall of the groove of the ball rod 5. The outer surface of the ball rod 5 is rotatably connected to a connecting rod 51, and the outer surface of the drive frame 3 is threadedly connected to a moving block 52. The outer surface of the moving block 52 is rotatably connected to the inner wall of the groove of the connecting rod 51. Through the rotatable connection between the drive frame 3 and the ball rod 5, the ball rod 5 is driven to rotate without affecting its deflection. Since the moving block 52 is threadedly connected to the drive frame 3, it is driven to rotate and move. The movement of the moving block 52 causes the connecting rod 51, which is rotatably connected to it and the ball rod 5, to deflect. As the ball rod 5 rotates, the rotation diameter gradually increases from bottom to top. The gradually increasing diameter helps to improve the grinding effect and ensure the uniformity of powder grinding. The rotation of the grinding jar 4 can help distribute the powder evenly and reduce the problem of insufficient grinding in the bottom area.

[0063] like Figure 7-8 As shown, an opening and closing device is provided in order to transport the ground alumina powder into the mixing device. The opening and closing device is located inside the collection tank 1 and transports the ground alumina powder into the mixing device. The opening and closing device includes a fan plate 74 and an opening and closing mechanism. The opening and closing mechanism includes a deflection rod 73. The deflection of the deflection rod 73 drives the fan plate 74 to open and close.

[0064] Specifically, in order to precisely control the opening and closing of the fan plate 74 and allow the ground alumina powder to enter the mixing tank 8, the opening and closing mechanism also includes an opening and closing rod 6. The outer surface of the opening and closing rod 6 is rotatably connected to the outer surface of the grinding tank 4 via a support rod. The outer surface of the rotating rod 34 drives the opening and closing rod 6 to rotate via a bevel gear set. A rotating gear 61 is slidably sleeved on the outer surface of the opening and closing rod 6. A rotating electromagnet 62 is fixedly installed on the outer surface of the opening and closing rod 6. A rotating spring 63 is fixedly installed on the outer surface of the opening and closing rod 6 to force the rotating gear 61 to reset. The rotating rod 34 drives the opening and closing rod 6 to rotate via the bevel gear set, which in turn drives the rotating gear 61, which is slidably sleeved with it, to rotate. When the rotating electromagnet 62 is energized, the rotating gear 61 meshes with the opening and closing gear 72, driving it to rotate. When the rotating electromagnet 62 is de-energized, the rotating spring 63 resets the rotating gear 61 and disengages it, so as to precisely control the opening and closing of the fan plate 74.

[0065] Specifically, in order to control the opening and closing of the fan plate 74 and allow the ground alumina powder to enter the mixing tank 8, a ring 7 is fixedly installed on the outer surface of the grinding tank 4. A support ring 71 is rotatably connected to the inner wall of the groove of the ring 7. An opening and closing gear 72 is fixedly installed on the outer surface of the support ring 71. After the rotating gear 61 descends, it meshes with the opening and closing gear 72. The outer surface of the support ring 71 is rotatably connected to the inner wall of the groove of the deflection rod 73. The inner wall of the groove of the deflection rod 73 is rotatably connected to the outer surface of the fan plate 74. The outer surface of the fan plate 74 is rotatably connected to the inner wall of the groove of the ring 7. Through the rotatable connection between the ring 7 and the support ring 71, the rotation of the support ring 71 does not affect the ring 7. When the rotating electromagnet 62 is energized, the rotating gear 61 meshes with the opening and closing gear 72, driving it to rotate. This drives the deflection rod 73, which is rotatably connected to it, to deflect. Thus, through the deflection rod 73, the fan plate 74, which is rotatably connected to it, deflects on the rotatably connected ring 7, so as to control the opening and closing of the fan plate 74 and allow the ground alumina powder to enter the mixing tank 8.

[0066] like Figure 9-12 As shown, a mixing device is provided to mix the sintering aid and the ground alumina powder. The mixing device is located on the inner wall of the collection tank 1 and mixes the sintering aid and the ground alumina powder. The mixing device includes a mixing plate 85, and the rotation of the mixing plate 85 mixes the sintering aid and the ground alumina powder.

[0067] Specifically, in order to drive the rotation of multiple mixing plates 85 by rotating one mixing plate 85, the mixing device also includes a mixing tank 8. The mixing tank 8 is fixedly installed on the inner wall of the collection tank 1. A fixing rod 81 is fixedly installed on the inner wall of the mixing tank 8. A support frame 82 is rotatably sleeved on the outer surface of the fixing rod 81. A rotating block 83 is rotatably connected to the inner wall of the groove of the support frame 82. A sleeve 84 is fixedly installed on the inner wall of the mixing tank 8. The sleeve 84 is located outside the fixing rod 81. The inner wall of the groove of the sleeve 84 is rotatably connected to the outer surface of the mixing plate 85. The outer surface of the mixing plate 85 is rotatably sleeved with the inner wall of the groove of the rotating block 83. The outer surface of the mixing plate 85 is rotatably connected with the inner wall of the groove of the mixing tank 8. It is rotatably sleeved with the support frame 82 through the fixing rod 81, which limits its position without affecting its rotation and lifting. The support frame 82 is rotatably connected with the rotating block 83. The mixing plate 85, which is rotatably connected with the mixing tank 8 and the sleeve 84 respectively, drives the support frame 82 to deflect and lift through the rotating block 83 that is rotatably sleeved with it. Thus, the rotation of one mixing plate 85 drives the rotation of multiple mixing plates 85.

[0068] Specifically, to ensure that the mixing plate 85 rotates synchronously and that the alumina powder and sintering aid in the mixing tank 8 can be effectively and uniformly mixed, a mixing rod 9 is rotatably connected to the outer surface of the collecting tank 1. A mixing gear 91 is fixedly installed on the outer surface of the mixing rod 9. After the drive gear 21 rises, it meshes with the mixing gear 91. One end of the mixing rod 9 drives the mixing plate 85 to rotate through a bevel gear set. The outer surfaces of one mixing plate 85 and the outer surfaces of another mixing plate 85 are rotatably connected to a synchronous belt 92 through a synchronous pulley. When the drive electromagnet 22 is energized, the drive gear 21 rises and meshes with the mixing gear 91, driving the mixing rod 9, which is rotatably connected to the collecting tank 1, to rotate. The mixing rod 9 drives the mixing plate 85 to rotate through the bevel gear set. Since one mixing plate 85 and the other mixing plate 85 and the synchronous belt 92 are rotatably connected through a synchronous pulley, the mixing plate 85 rotates synchronously, ensuring that the alumina powder and sintering aid in the mixing tank 8 can be effectively and uniformly mixed.

[0069] Working principle: When grinding the screened alumina powder is required, motor 2 is started, driving electromagnet 22 to be de-energized, driving spring 23 to reset drive gear 21 and mesh with rotating gear 31, causing drive frame 3 to rotate. This causes rotating bevel gear 33, which is rotatably connected to it, to rotate on its own axis while meshing with drive bevel gear 32. Rotating bevel gear 33 drives rotating rod 34, which is fixedly mounted to it, to rotate on its own axis and revolve around the central axis. Rotating rod 34 is rotatably connected to support rod 42, thereby driving grinding jar 4, which is fixedly mounted to support rod 42, to rotate. Because the gear ratios of drive bevel gear 32 and rotating bevel gear 33 are different, the rotation speeds of grinding jar 4 and drive frame 3 are different, which helps to uniformly grind the powder. The mixture ensures a more uniform material distribution during the grinding process. The filter screen 41 prevents excessively large particles from entering the mixing tank 8, allowing it to continue grinding and ensuring uniformity. At the same time, the drive frame 3 drives the ball rod 5, which is rotatably connected to it, to rotate. Since the moving block 52 is threadedly connected to the drive frame 3, it drives the ball rod 5 to rotate and move. The movement of the moving block 52 causes the connecting rod 51, which is rotatably connected to the ball rod 5, to deflect. As the ball rod 5 rotates, the rotation diameter gradually increases from bottom to top. The gradually increasing diameter helps to improve the grinding effect and ensure the uniformity of powder grinding. The rotation of the grinding tank 4 can help to evenly distribute the powder and reduce the problem of insufficient grinding in the bottom area.

[0070] After grinding, the rotating rod 34 drives the opening and closing rod 6 to rotate through the bevel gear set, which in turn drives the rotating gear 61 to rotate. The rotating electromagnet 62 is energized, and the rotating gear 61 meshes with the opening and closing gear 72, driving it to rotate. This drives the deflection rod 73, which is rotatably connected to it, to deflect. Thus, the deflection rod 73 causes the rotatably connected fan plate 74 to deflect on the rotatably connected ring 7, controlling the unfolding of the fan plate 74. This allows the ground alumina powder to enter the mixing tank 8. After the fan plate 74 unfolds and closes, the rotating electromagnet 62 is de-energized, and the rotating gear 61 disengages from the opening and closing gear 72.

[0071] When the ground alumina powder enters the mixing tank 8, the driving electromagnet 22 is energized, and the driving gear 21 rises and meshes with the mixing gear 91, driving the mixing rod 9, which is rotatably connected to the collection tank 1, to rotate. The mixing rod 9 drives the mixing plate 85, which is rotatably connected to the mixing tank 8 and the sleeve 84, to rotate through the bevel gear set. This causes the rotating block 83, which is rotatably sleeved with the plate, to drive the support frame 82, which is rotatably connected to the rotating block 83, to rise and fall due to the deflection of the fixed rod 81, thus driving multiple mixing plates 85 to rotate through the rotation of one mixing plate 85. Since one mixing plate 85 is rotatably connected to another mixing plate 85 and the synchronous belt 92 through the synchronous pulley, the mixing plates 85 rotate synchronously, ensuring that the alumina powder and sintering aid in the mixing tank 8 can be effectively and uniformly mixed.

[0072] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for preparing CNC cutting tools for alumina ceramics, characterized in that: Including step one: screening: selecting high-purity alumina powder and removing large particles and impurities; Step Two: Grinding: The screened powder is put into a grinding device and ground by the grinding device; Step 3: Mixing: The finely ground alumina powder is evenly mixed with the sintering aid in the grinding equipment; Step 4: Molding: Place the powder mixed in Step 3 into a press and press it into shape; Step 5: Degreasing: Place the tool that was pressed and shaped in Step 4 under low temperature and heat it to remove the binder and form a degreased blank; Step Six: Sintering: Place the degreased cutting tools into the sintering furnace. After sintering, slowly cool down. Step 7: Machining: Rough machining is performed using a CNC lathe, followed by finish machining using a grinding machine, and finally polishing to obtain the cutting tool; The grinding equipment in step two includes a collection tank (1) with locking rollers, a grinding device, an opening and closing device, and a mixing device; The grinding device is located inside the collection tank (1) and grinds the screened alumina powder. The grinding device includes a driving mechanism and a grinding mechanism. The driving mechanism includes a driving frame (3). The rotation of the driving frame (3) drives the grinding mechanism to rotate. The grinding mechanism includes a ball rod (5). The rotation of the ball rod (5) grinds the alumina powder. The driving mechanism also includes a motor (2), which is fixedly installed on the outer surface of the collection tank (1). The output shaft of the motor (2) is slidably sleeved with a drive gear (21), and the output shaft of the motor (2) is fixedly installed with a drive electromagnet (22). The output shaft of the motor (2) is fixedly installed with a drive spring (23) that forces the drive gear (21) to reset. The outer surface of the collection tank (1) is rotatably connected to the outer surface of the drive frame (3) via bearings. A rotating gear (31) is fixedly installed on the outer surface of the drive frame (3). After the drive gear (21) is reset, it meshes with the rotating gear (31). A drive bevel gear (32) is rotatably connected to the outer surface of the drive frame (3). A rotating bevel gear (33) is rotatably connected to the outer surface of the drive frame (3). The rotating bevel gear (33) meshes with the drive bevel gear (32). A rotating rod (34) is fixedly installed on the outer surface of the rotating bevel gear (33). The grinding mechanism also includes a grinding tank (4), which is rotatably connected to the outer surface of the drive frame (3). A filter screen (41) is fixedly installed on the inner wall of the grinding tank (4). A support rod (42) is rotatably connected to the outer surface of the rotating rod (34). The outer surface of the support rod (42) is fixedly installed to the outer surface of the grinding tank (4). The outer surface of the drive frame (3) is rotatably connected to the inner wall of the groove of the ball stick (5), the outer surface of the ball stick (5) is rotatably connected to a connecting rod (51), the outer surface of the drive frame (3) is threadedly connected to a moving block (52), and the outer surface of the moving block (52) is rotatably connected to the inner wall of the groove of the connecting rod (51). The opening and closing device is located inside the collection tank (1) and conveys the ground alumina powder into the mixing device. The opening and closing device includes a fan plate (74) and an opening and closing mechanism. The opening and closing mechanism includes a deflection rod (73). The deflection of the deflection rod (73) drives the fan plate (74) to open and close. The mixing device is located on the inner wall of the collection tank (1) and mixes the sintering aid and the ground alumina powder. The mixing device includes a mixing plate (85), and the rotation of the mixing plate (85) mixes the sintering aid and the ground alumina powder. The mixing device also includes a mixing tank (8), which is fixedly installed on the inner wall of the collection tank (1). A fixing rod (81) is fixedly installed on the inner wall of the mixing tank (8). A support frame (82) is rotatably sleeved on the outer surface of the fixing rod (81). A rotating block (83) is rotatably connected to the inner wall of the groove of the support frame (82). A sleeve (84) is fixedly installed on the inner wall of the mixing tank (8). The sleeve (84) is located outside the fixing rod (81). The inner wall of the groove of the sleeve (84) is rotatably connected to the outer surface of the mixing plate (85). The outer surface of the mixing plate (85) is rotatably sleeved on the inner wall of the groove of the rotating block (83). The outer surface of the mixing plate (85) is rotatably connected to the inner wall of the groove of the mixing tank (8). A mixing rod (9) is rotatably connected to the outer surface of the collection tank (1). A mixing gear (91) is fixedly installed on the outer surface of the mixing rod (9). After the drive gear (21) rises, it meshes with the mixing gear (91). One end of the mixing rod (9) drives the mixing plate (85) to rotate through a bevel gear set. The outer surfaces of one mixing plate (85) and the outer surfaces of the other mixing plate (85) are rotatably connected by a synchronous belt (92) through a synchronous pulley.

2. The method for preparing alumina ceramic CNC cutting tools according to claim 1, characterized in that: The opening and closing mechanism also includes an opening and closing rod (6). The outer surface of the opening and closing rod (6) is rotatably connected to the outer surface of the grinding jar (4) through a support rod. The outer surface of the rotating rod (34) drives the opening and closing rod (6) to rotate through a bevel gear set. A rotating gear (61) is slidably sleeved on the outer surface of the opening and closing rod (6). A rotating electromagnet (62) is fixedly installed on the outer surface of the opening and closing rod (6). A rotating spring (63) is fixedly installed on the outer surface of the opening and closing rod (6) to force the rotating gear (61) to reset.

3. The method for preparing alumina ceramic CNC cutting tools according to claim 2, characterized in that: A ring (7) is fixedly installed on the outer surface of the grinding jar (4). A support ring (71) is slidably inserted into the outer surface of the ring (7) through a support column. A gear (72) is fixedly installed on the outer surface of the support ring (71). After the rotating gear (61) descends, it meshes with the gear (72). The outer surface of the support ring (71) is rotatably connected to the inner wall of the groove of the deflection rod (73). The inner wall of the groove of the deflection rod (73) is rotatably connected to the outer surface of the fan plate (74). The outer surface of the fan plate (74) is rotatably connected to the inner wall of the groove of the ring (7).

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