Assembly used for synthesizing composite sheet with cylindrical protrusion at tail and synthesis method thereof

Abstract

The present invention relates to an assembly used for synthesizing a composite sheet with a cylindrical protrusion at the tail and a synthesis method thereof; the assembly comprises a metal cup A, a metal cup B and an auxiliary ring; diamond micropowder is mixed with a binder and is arranged at the bottom of the metal cup A; a cemented carbide substrate is pressed on top of the diamond micropowder, the bottom is a large cylinder, and the top is a small cylinder coaxially connected to the large cylinder; the auxiliary ring is in the shape of a gasket corresponding to the small cylinder and is sleeved outside the small cylinder; the metal cup B is buckled and mounted on the top of the small cylinder; the auxiliary ring is made of a high-temperature and high-pressure resistant material. The steps of the synthesis method are: 1. preparing raw materials, 2. high-temperature and high-pressure synthesis, and 3. mechanical processing; the present invention uses the auxiliary ring to support the metal cup A during high-temperature and high-pressure synthesis to ensure the formation of the composite sheet; the metal cup A ensures that the diamond powder is formed and connected to the cemented carbide bottom; during mechanical processing, the auxiliary ring can reduce the cutting difficulty of the cylindrical protrusion, reduce the cutting processing cost of the cylindrical protrusion, and improve processing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of diamond composite sheet synthesis, in particular to an assembly used for synthesizing a composite sheet with a cylindrical protrusion at the tail and a synthesis method thereof. Background Art

[0002] The composite sheet with a cylindrical protrusion at the tail is provided with a cylindrical protrusion at the tail for installation. The current method for synthesizing a composite sheet with a hole in the middle is as follows: Step 1, prepare the raw materials. Select appropriate diamond micropowder and cemented carbide matrix, mix them, and place them inside a metal cup; Step 2, high temperature and high pressure synthesis. Place the prepared raw materials into a talc block to form a synthetic block; place the synthetic block into a six-sided top press for high temperature and high pressure synthesis; Step 3, mechanical processing. Peel off the outer metal cup, and then process the cemented carbide matrix through mechanical processing methods such as grinding or turning to form a cylindrical protrusion.

[0003] However, cemented carbide has high wear resistance and toughness, and many turning tools are made of tungsten carbide. Turning carbide with turning tools results in rapid tool wear, resulting in high processing costs. Grinding is also less efficient, with significant grinding wheel wear, high grinding wheel wear costs, and low grinding efficiency. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and to provide an assembly used for synthesizing a composite sheet with a cylindrical protrusion at the tail and a synthesis method thereof.

[0005] The technical solution of the present invention is: a composite sheet with a cylindrical protrusion at the tail is synthesized using a combination of metal cup A, metal cup B and an auxiliary ring; diamond micropowder is mixed with a binder and arranged at the bottom of metal cup A; a cemented carbide substrate is pressed above the diamond micropowder, the bottom is a large cylinder, and the top is a small cylinder coaxially connected to the large cylinder; the cemented carbide substrate is obtained by mixing tungsten carbide powder and cobalt powder in a certain proportion, pressing at room temperature, and sintering at high temperature under micro-pressure; the auxiliary ring is in the shape of a gasket corresponding to the small cylinder and is sleeved on the outside of the small cylinder; the position of the auxiliary ring corresponds to the part of the outer side of the cylindrical protrusion that needs to be cut; metal cup B is buckled on the top of the small cylinder; the auxiliary ring is made of high-temperature and high-pressure resistant material, and has certain strength and high-temperature resistance characteristics; the auxiliary ring supports metal cup B to ensure the formation of the composite sheet; metal cup A and metal cup B ensure that the diamond powder is formed and connected to the cemented carbide bottom as a whole.

[0006] Preferably, the auxiliary ring is obtained by mixing, pressing and sintering magnesium oxide powder; the melting point of magnesium oxide is 2852°C.

[0007] Preferably, the lower edge of metal cup B overlaps with the upper edge of metal cup A; metal cup A and metal cup B form a closed state, which can prevent foreign objects from entering the interior of metal cup A and metal cup B.

[0008] Preferably, metal cup B includes an intermediate circular plate, a top circular plate, an outer circular ring and an inner circular ring; the top of the outer circular ring is connected to the outer edge of the intermediate circular plate; the lower end of the inner circular ring is connected to the inner edge of the intermediate circular plate; the upper end of the inner circular ring is connected to the edge of the top original plate; the bottom of the auxiliary ring is connected to the top of the intermediate circular plate; the inner wall of the auxiliary ring is connected to the outer wall of the inner ring; the auxiliary ring is sleeved outside the inner circular ring, which is conducive to the cutting of the auxiliary ring.

[0009] Furthermore, the top of the top circular plate is flush with the top of the auxiliary ring, so that the top circular plate and the auxiliary ring can be supported together.

[0010] Furthermore, the side surface of the auxiliary ring does not exceed the outer wall of the metal cup armor so as to bear the pressure together.

[0011] Furthermore, the auxiliary ring is obtained by mixing and pressing sodium chloride and zirconium dioxide; when the auxiliary ring is 75% to 90% sodium chloride and 10% to 25% zirconium dioxide, because the melting point of sodium chloride is 800°C, during high-temperature and high-pressure synthesis at 1450°C to 1550°C, a portion of the auxiliary ring sodium chloride material may diffuse along the gap between metal cup A and cemented carbide to the lower diamond layer; but metal cup B separates the sodium chloride on the outside.

[0012] A method for synthesizing an assembly for synthesizing a composite sheet with a cylindrical protrusion at the tail, comprising the following steps:

[0013] ①Prepare raw materials

[0014] Select appropriate diamond micropowder and cemented carbide matrix, mix them, and place them inside the metal cup A; the bottom of the cemented carbide matrix is ​​a large cylinder, and the top is a small cylinder coaxially connected to the large cylinder. It is obtained by mixing tungsten carbide powder and cobalt powder in a certain proportion, pressing at room temperature, and sintering at high temperature under slight pressure; the diamond micropowder is mixed with an appropriate amount of binder and placed at the bottom of the metal cup A; the large cylinder is placed on top of the diamond micropowder; the auxiliary ring is in the shape of a gasket corresponding to the small cylinder and is fitted outside the small cylinder; the position of the auxiliary ring corresponds to the part of the outer side of the cylindrical protrusion that needs to be cut; the metal cup B is buckled and installed on the top of the small cylinder; the auxiliary ring is made of high-temperature and high-pressure resistant material, and has certain strength and high-temperature resistance characteristics;

[0015] ②High temperature and high pressure synthesis

[0016] The prepared raw materials are placed into a pyrophyllite block to form a composite block. The pyrophyllite block is equipped with heating devices, pressure transmission devices, and heat conduction devices to facilitate high-temperature and high-pressure synthesis. The composite block is placed in a six-sided top press for high-temperature and high-pressure synthesis. The synthesis pressure is 5.5-7.5GPa and the synthesis temperature is 1450-1550℃. The auxiliary ring supports the metal cup B to ensure the formation of the composite sheet. The metal cups A and B ensure that the diamond powder is formed and connected to the cemented carbide bottom.

[0017] ③Machining

[0018] The synthetic block is taken out and the talc block is peeled off; the outer metal cup is peeled off using a sandblasting process to expose the internal composite sheet body; the outer circle of the composite sheet is cut until the outer diameter of the composite sheet reaches the outer diameter of the finished composite sheet; the top of the composite sheet is plane-cut until the height of the composite sheet reaches the height of the finished composite sheet; the auxiliary ring part is cut to form a cylindrical protrusion; because the auxiliary ring is much less difficult to process than the diamond layer or cemented carbide, the cutting cost of the cylindrical protrusion is reduced and the processing efficiency is improved.

[0019] Preferably, the top of metal cup B is connected to the top of the auxiliary ring, and the auxiliary ring is covered inside metal cup B; in step ②, the auxiliary ring is first put on the outside of the small cylinder; and then metal cup B is buckled on the top of the auxiliary ring.

[0020] Preferably, the above-mentioned composite sheet with a cylindrical protrusion at the synthetic tail is synthesized using the assembly used; the metal cup B includes a middle circular plate, a top circular plate, an outer circular ring and an inner circular ring; the top of the outer circular ring is connected to the outer edge of the middle circular plate; the lower end of the inner circular ring is connected to the inner edge of the middle circular plate; the upper end of the inner circular ring is connected to the edge of the top original plate; the bottom of the auxiliary ring is connected to the top of the middle circular plate; the inner wall of the auxiliary ring is connected to the outer wall of the inner ring; the auxiliary ring is sleeved on the outside of the inner circular ring; in step ②, first sleeve the metal cup B on the outside of the small cylinder; then sleeve the auxiliary ring on the top of the metal cup B.

[0021] The beneficial effects of the present invention are as follows: the assembly used for the composite sheet with a cylindrical protrusion at the tail of the present invention has the following advantages:

[0022] (1) The auxiliary ring of the present invention supports the metal cup during high temperature and high pressure synthesis to ensure the formation of the composite sheet; the metal cup ensures the formation of the diamond powder and is connected to the cemented carbide bottom; during machining, the auxiliary ring can reduce the cutting difficulty of the cylindrical protrusion, reduce the cutting processing cost of the cylindrical protrusion, and improve the processing efficiency;

[0023] (2) The top of the top circular plate of the present invention is flush with the top of the auxiliary ring, so that the top circular plate and the auxiliary ring can be supported together.

[0024] The synthesis method can reduce the cutting difficulty of the cylindrical protrusion during mechanical processing, reduce the cutting processing cost of the cylindrical protrusion, and improve the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a cutaway perspective view of the assembly in Example 1;

[0026] Figure 2 is a sectional perspective view of the assembly in Example 2;

[0027] Figure 3 is a cutaway perspective view of the raw material in Example 3;

[0028] Figure 4 is a cutaway perspective view of the raw material in Example 4;

[0029] Figure 5 This is a physical picture of the present invention after high temperature and high pressure synthesis;

[0030] In the figure: 1. Diamond powder, 2. Carbide substrate, 21. Large cylinder, 22. Small cylinder, 3. Metal cup A, 4. Metal cup B, 41. Middle circular plate, 42. Top circular plate, 43. Outer circular ring, 44. Inner circular ring, 5. Auxiliary ring. DETAILED DESCRIPTION

[0031] Example 1: See Figure 1 , a composite sheet with a cylindrical protrusion at the tail is synthesized using an assembly comprising a metal cup A 3, a metal cup B 4 and an auxiliary ring 5; diamond powder 1 is mixed with a binder and is arranged at the bottom of the metal cup A 3; a cemented carbide substrate 2 is pressed on top of the diamond powder 1, with a large cylinder 21 at the bottom and a small cylinder 22 coaxially connected to the large cylinder 21 at the top; the cemented carbide substrate 2 is obtained by mixing tungsten carbide powder and cobalt powder in a certain proportion, pressing at room temperature, and sintering at high temperature under micro-pressure; the auxiliary ring 5 is in the shape of a gasket corresponding to the small cylinder 22 and is sleeved on the outside of the small cylinder 22; the position of the auxiliary ring 5 corresponds to the part of the outer side of the cylindrical protrusion that needs to be cut; the metal cup B 4 is buckled on the top of the small cylinder 22; the auxiliary ring 5 is made of high-temperature and high-pressure resistant material, and has certain strength and high-temperature resistance; the auxiliary ring 5 supports the metal cup B 4 to ensure the formation of the composite sheet; the metal cup A 3 and the metal cup B 4 ensure that the diamond powder is formed and connected to the cemented carbide bottom as a whole.

[0032] Compared with the prior art, the present invention utilizes the auxiliary ring 5 to support the metal cup 3 during high-temperature and high-pressure synthesis to ensure the formation of the composite sheet; the metal cup 3 ensures the formation of the diamond powder and is connected to the cemented carbide bottom as a whole; during machining, the auxiliary ring 5 can reduce the cutting difficulty of the cylindrical protrusion, reduce the cutting processing cost of the cylindrical protrusion, and improve the processing efficiency.

[0033] The lower edge of the metal cup B 4 overlaps with the upper edge of the metal cup A 3 ; the metal cup A 3 and the metal cup B 4 form a closed state, which can prevent foreign objects from entering the interior of the metal cup A 3 and the metal cup B 4 .

[0034] Example 2: See Figure 2 , Example 2 is basically the same as Example 1, and the similarities are not repeated here. The differences are as follows: Metal cup B 4 includes an intermediate circular plate 41, a top circular plate 42, an outer circular ring 43 and an inner circular ring 44; the top of the outer circular ring 43 is connected to the outer edge of the intermediate circular plate 41; the lower end of the inner circular ring 44 is connected to the inner edge of the intermediate circular plate 41; the upper end of the inner circular ring 44 is connected to the edge of the top original plate; the bottom of the auxiliary ring 5 is connected to the top of the intermediate circular plate 41; the inner wall of the auxiliary ring 5 is connected to the outer wall of the inner circular ring 44; the auxiliary ring 5 is sleeved outside the inner circular ring 44, which is beneficial to the cutting of the auxiliary ring 5.

[0035] The top of the top circular plate 42 is flush with the top of the auxiliary ring 5 so that the top circular plate 42 and the auxiliary ring 5 can be supported together.

[0036] The side surface of the auxiliary ring 5 does not exceed the outer wall of the metal cup armor 3, so that the side surface of the auxiliary ring 5 and the metal cup armor 3 can be supported together.

[0037] Auxiliary ring 5 is made of sodium chloride and zirconium dioxide through a mixing and pressing process. When auxiliary ring 5 is 75% to 90% sodium chloride and 10% to 25% zirconium dioxide, because the melting point of sodium chloride is 800°C, during high-temperature and high-pressure synthesis at 1450°C to 1550°C, some of the sodium chloride material in auxiliary ring 5 may diffuse through the gap into the lower diamond layer; however, metal cup B 4 isolates the sodium chloride on the outside.

[0038] Example 3: See Figure 3 A method for synthesizing an assembly for synthesizing a composite sheet with a cylindrical protrusion at the tail as described in Example 1 comprises the following steps:

[0039] ①Prepare raw materials

[0040] Select appropriate diamond powder 1 and cemented carbide matrix 2, mix them, and place them inside metal cup A 3; the bottom of the cemented carbide matrix 2 is a large cylinder 21, and the top is a small cylinder 22 coaxially connected to the large cylinder 21, which is obtained by mixing tungsten carbide powder and cobalt powder in a certain proportion, pressing at room temperature, and sintering at high temperature under slight pressure; the diamond powder 1 is mixed with an appropriate amount of binder and placed at the bottom of the metal cup A 3; the large cylinder 21 is placed on top of the diamond powder 1; the auxiliary ring 5 is in the shape of a gasket corresponding to the small cylinder 22 and is sleeved on the outside of the small cylinder 22; the position of the auxiliary ring 5 corresponds to the part of the outer side of the cylindrical protrusion that needs to be cut; the metal cup B 4 is buckled onto the top of the small cylinder 22; the auxiliary ring 5 is made of high-temperature and high-pressure resistant material, and has certain strength and high-temperature resistance characteristics;

[0041] ②High temperature and high pressure synthesis

[0042] The prepared raw materials are placed into a pyrophyllite block to form a composite block. The pyrophyllite block is equipped with heating devices, pressure transmission devices, and heat conduction devices to facilitate high-temperature and high-pressure synthesis. The composite block is placed in a six-sided top press for high-temperature and high-pressure synthesis. The synthesis pressure is 5.5-7.5GPa and the synthesis temperature is 1450-1550°C. The auxiliary ring 5 supports the metal cup B 4 to ensure the formation of the composite sheet. The metal cups A 3 and B 4 ensure that the diamond powder is formed and connected to the cemented carbide bottom.

[0043] ③Machining

[0044] The synthetic block is taken out and the talc block is peeled off; the outer metal cup is peeled off using a sandblasting process to expose the internal composite sheet body; the outer circle of the composite sheet is cut until the outer diameter of the composite sheet reaches the outer diameter of the finished composite sheet; the top of the composite sheet is plane-cut until the height of the composite sheet reaches the height of the finished composite sheet; the auxiliary ring 5 part is cut to form a cylindrical protrusion; because the auxiliary ring 5 is much less difficult to process than the diamond layer or cemented carbide, the cutting cost of the cylindrical protrusion is reduced and the processing efficiency is improved.

[0045] The top of the metal cup B 4 is connected to the top of the auxiliary ring 5, and the auxiliary ring 5 is covered inside the metal cup B 4; in step ②, the auxiliary ring 5 is first put on the outside of the small cylinder 22; then the metal cup B 4 is buckled on the top of the auxiliary ring 5.

[0046] Example 4: See Figure 4 A method for synthesizing an assembly for synthesizing a composite sheet with a cylindrical protrusion at the tail as described in Example 2 comprises the following steps:

[0047] In step ②, firstly, the metal cup B 4 is sheathed on the outside of the small cylinder 22 ; and then the auxiliary ring 5 is sheathed on the top of the metal cup B 4 .

Claims

1. An assembly for a composite sheet with a cylindrical protrusion at the tail, characterized in that: It includes metal cup A, metal cup B and an auxiliary ring; diamond micropowder is mixed with a binder and arranged at the bottom of metal cup A; a cemented carbide substrate is pressed on top of the diamond micropowder, the bottom is a large cylinder, and the top is a small cylinder coaxially connected to the large cylinder; the auxiliary ring is a gasket shape corresponding to the small cylinder and is sleeved outside the small cylinder; metal cup B is buckled and installed on the top of the small cylinder; the auxiliary ring is made of high-temperature and high-pressure resistant material, and is obtained by mixing, pressing and sintering magnesium oxide powder or mixing and pressing sodium chloride and zirconium dioxide.

2. The assembly for synthesizing a composite sheet with a cylindrical protrusion at the tail according to claim 1, characterized in that: The auxiliary ring is obtained by mixing, pressing and sintering magnesium oxide powder.

3. The assembly for synthesizing a composite sheet with a cylindrical protrusion at the tail according to claim 1, characterized in that: The lower edge of metal cup B overlaps with the upper edge of metal cup A.

4. The assembly for synthesizing a composite sheet with a cylindrical protrusion at the tail according to claim 1, characterized in that: Metal cup B includes a middle circular plate, a top circular plate, an outer circular ring and an inner circular ring; the top of the outer circular ring is connected to the outer edge of the middle circular plate; the lower end of the inner circular ring is connected to the inner edge of the middle circular plate; the upper end of the inner circular ring is connected to the edge of the top original plate; the bottom of the auxiliary ring is connected to the top of the middle circular plate; and the inner wall of the auxiliary ring is connected to the outer wall of the inner ring.

5. The assembly for synthesizing a composite sheet with a cylindrical protrusion at the tail according to claim 4, characterized in that: The top of the top circular plate is flush with the top of the auxiliary ring.

6. The assembly for synthesizing a composite sheet with a cylindrical protrusion at the tail according to claim 4, characterized in that: The side surface of the auxiliary ring does not exceed the outer wall of the metal cup armor.

7. A method for synthesizing an assembly for synthesizing a composite sheet with a cylindrical protrusion at the tail according to claim 1, comprising the following steps: ①Prepare raw materials Select appropriate diamond powder and a suitable amount of binder, mix them and put them into the metal cup; Place the large cylinder on top of the diamond powder; the auxiliary ring is outside the small cylinder; and the metal cup is mounted on the top of the small cylinder. ②High temperature and high pressure synthesis Put the prepared raw materials into the pyrophyllite block to form a synthetic block; put the synthetic block into a six-sided top press for high temperature and high pressure synthesis; ③Machining The composite block is removed and the pyrophyllite block is peeled off; the outer metal cup is peeled off using a sandblasting process; the outer circle of the composite sheet is cut until the outer diameter of the composite sheet reaches the outer diameter of the finished composite sheet; the top of the composite sheet is plane-cut until the height of the composite sheet reaches the height of the finished composite sheet; and the auxiliary ring part is cut to form a cylindrical protrusion.

8. The synthesis method according to claim 7, wherein: The top of metal cup B is connected to the top of the auxiliary ring; in step ②, first put the auxiliary ring outside the small cylinder; then buckle metal cup B on the top of the auxiliary ring.

9. The synthesis method according to claim 7, characterized in that: The composite sheet with a cylindrical protrusion at the tail as claimed in claim 4 is synthesized using the assembly used; in step ②, first, metal cup B is sheathed outside the small cylinder; and then the auxiliary ring is sheathed on the top of metal cup B.

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