A preparation process of diamond blade

Abstract

The invention discloses a preparation process of a diamond blade, which specifically comprises the following steps: S1, preparing a rough blank of a diamond blade; S2, hot pressing and sintering, placing the rough blank in a sintering mold, the material of the sintering mold is hot working die steel, based on the thickness of the rough blank itself, the rough blank is adaptively pressed in the sintering mold, and then the rough blank is sintered to form a shaped blade blank; S3, rough machining, sequentially performing a first polishing on the surface of the shaped blade blank, performing a wire cutting on the inner hole, and grinding the outer circle of the shaped blade blank to obtain a fine blade blank; S4, fine polishing, performing a second polishing on both sides of the fine blade blank using a diamond polishing pad; S5, coating, coating the surface of the fine blade blank after fine polishing is completed, the optimization of the entire process of the invention improves the durability and hardness of the fine blade blank, thereby improving the cutting performance of the fine blade blank, and avoiding the lip effect of the cutting product and scrapping.

Description

Technical Field

[0001] The present invention relates to the technical field of production of diamond blades, and more specifically, to a preparation process of diamond blades. Background Art

[0002] BGA (Ball Grid Array) is a new type of packaging developed in the world in the early 1990s. This packaging technology occupies a major position in small, light, high-performance packaging. It has now developed into a mature high-density packaging technology, mainly suitable for the packaging of PC chipsets, microprocessors / controllers, ASICs, gate arrays, memories, DSPs, PDAs, PLDs and other devices. In the process from BGA packaging to processing, the cutting process is one of the most important links, which directly affects the production cost and output.

[0003] At present, diamond blades are widely used to cut BGA package substrates. This cutting method can achieve high-precision cutting and easily ensure cutting quality. However, many processing defects usually occur during the cutting process, such as edge collapse, burrs, and lip effects. The reasons for these defects are the asynchronous radial and lateral wear of the diamond blade. Usually, as the cutting length increases, the radial consumption is too slow, causing excessive wear on both sides, which in turn causes abnormal changes in the shape of the cutting edge.

[0004] In view of the above problems, the traditional sintering mold is made of graphite and is free sintering. The thickness of the blade cannot be accurately controlled. Graphite is very easy to carbonize and wear, which will lead to poor thickness uniformity of the sintered blade. The thickness does not meet the cutting requirements and needs to be ground with a double-sided grinder. Silicon carbide free abrasives need to be added during the grinding process. The surface diamond of the blade processed by this process is high and the actual thickness of the binder is low. Therefore, the surface diamond is very easy to fall off during the cutting process. Usually, only 1-2Km can be cut. After the surface diamond falls off, the blade will become narrower, resulting in the actual size of the cut product being too large or a lip effect, which will lead to scrapping. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a process for preparing a diamond blade.

[0006] To achieve the above object, the present invention provides a process for preparing a diamond blade, which specifically comprises the following steps:

[0007] S1. preparing a rough blank of a diamond blade, wherein the rough blank has an inner hole;

[0008] S2, hot pressing and sintering, placing the rough blank in a sintering mold, the material of the sintering mold is hot working die steel, based on the thickness of the rough blank itself, the rough blank is adaptively pressed in the sintering mold, and then the rough blank is sintered into a formed blade blank;

[0009] S3, rough processing, sequentially polishing the surface of the formed blade blank, wire cutting the inner hole, and grinding the outer circle of the formed blade blank to obtain a fine blade blank;

[0010] S4, fine polishing, use diamond polishing pad to perform secondary polishing on both sides of the fine knife blank. During the secondary polishing process, continue to add cerium oxide polishing powder until both sides of the fine knife blank are bright;

[0011] S5, coating, after the fine polishing of the fine blade blank is completed, a coating is applied on the surface.

[0012] Furthermore, in step S2, a blank placement plate is provided at the center of the sintering mold, and the blank is rotated so as to be adaptively pressed in the sintering mold.

[0013] Furthermore, the above-mentioned sintering mold includes a mold tray and a cover plate. A rotatable positioning rod is provided at the center position of the mold tray. The placement plate is fixed on the positioning rod. The bottom of the positioning rod extends below the mold tray. The inner hole of the rough blank passes through the positioning rod and is placed on the placement plate. The cover plate is provided with a pressure plate that can elastically move up and down. When the cover plate is closed on the mold tray, the pressure plate elastically presses the rough blank on the placement plate.

[0014] Furthermore, the structure of the sintering mold also includes a base plate, a cover plate is provided with a plurality of guide rods, the base plate is provided with a plurality of guide grooves, the guide grooves are provided with buffer springs, the guide rods are movably arranged inside the guide grooves and fixedly connected to the buffer springs, and the pressure plate is rotatably arranged on the base plate.

[0015] Furthermore, a docking joint is provided on the top of the positioning rod, and a docking port is provided at the center of the pressure plate. When the pressure plate is pressed tightly on the rough blank, the docking joint is positioned and clamped in the internal docking joint of the docking port, so that the docking joint synchronously drives the pressure plate to rotate.

[0016] Furthermore, the above-mentioned docking joints and docking ports are both hexagonal.

[0017] Furthermore, a rotating handle is provided at the bottom of the positioning rod.

[0018] Furthermore, the placement plate is circular, and is surrounded by side panels, the height of which is smaller than the positioning rod.

[0019] Furthermore, the coating is any one of a diamond coating, a diamond-like coating, a physical vapor deposition coating, and a titanium nitride coating.

[0020] The technical effects and advantages of the present invention are as follows: the sintering mold made of hot working die steel has good wear resistance, and can accurately control the thickness of the blade by adaptively pressing the rough blank into the sintering mold each time. In the subsequent first polishing and second polishing, only the surfaces of the formed blade blank and the refined blade blank are polished, and the thickness of the final refined blade blank is not changed. Finally, the required coating is applied on the surface according to the cutting requirements of the refined blade blank. The optimization of the entire process improves the durability and hardness of the refined blade blank, thereby improving the cutting performance of the refined blade blank and avoiding the lip effect of the cut product and scrapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a side structural diagram of the sintering mold of the present invention.

[0022] Figure 2 It is a projection diagram of the positioning rod of the present invention on the placement plate.

[0023] Figure 3 It is a cross-sectional view of the surface of the pressing plate of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 creative work are within the scope of protection of the present invention.

[0025] like Figures 1 to 3 A specific implementation of the present invention specifically includes the following steps:

[0026] S1. preparing a rough blank of a diamond blade, wherein the rough blank has an inner hole;

[0027] S2, hot pressing and sintering, placing the rough blank in a sintering mold 1, the material of the sintering mold 1 is hot working die steel, based on the thickness of the rough blank itself, the rough blank is adaptively pressed in the sintering mold 1, and then the rough blank is sintered to form a formed blade blank;

[0028] S3, rough processing, sequentially polishing the surface of the formed blade blank, wire cutting the inner hole, and grinding the outer circle of the formed blade blank to obtain a fine blade blank;

[0029] S4, fine polishing, use diamond polishing pad to perform secondary polishing on both sides of the fine knife blank. During the secondary polishing process, continue to add cerium oxide polishing powder until both sides of the fine knife blank are bright;

[0030] S5, coating, after the fine polishing of the fine blade blank is completed, a coating is applied on the surface.

[0031] In the present invention, the sintering mold 1 made of hot working die steel has good wear resistance. At the same time, the rough blank is adaptively pressed in the sintering mold 1 each time, so the thickness of the blade can be accurately controlled. In the subsequent first polishing and second polishing, only the surface of the formed blade blank and the refined blade blank is polished, and the thickness of the final refined blade blank is not changed. Finally, according to the cutting needs of the refined blade blank, the required coating is applied on the surface. The optimization of the entire process improves the durability and hardness of the refined blade blank, thereby improving the cutting performance of the refined blade blank and avoiding the lip effect of the cut product and scrapping.

[0032] In the present invention, as a preferred solution, in step S2, a blank placement plate 2 is provided at the center of the sintering mold 1, and the blank placement plate 2 rotates so that the blank is adaptively pressed in the sintering mold 1.

[0033] In the present invention, since the surface of the rough blank is relatively rough, when the rough blank is placed on the placement plate 2, the placement plate 2 is rotated to adaptively adjust the position of the rough blank on the placement plate 2, so that the rough blank can be adaptively pressed in the sintering mold 1.

[0034] In the present invention, as a preferred embodiment, the sintering mold 1 includes a mold tray 11 and a cover plate 12. A rotatable positioning rod 3 is provided at the center of the mold tray 11. The placement plate 2 is fixed on the positioning rod 3. The bottom of the positioning rod 3 extends below the mold tray 11. The inner hole of the rough blank passes through the positioning rod 3 and is placed on the placement plate 2. The cover plate 12 is provided with a pressing plate 31 that can elastically move up and down. When the cover plate 12 is closed on the mold tray 11, the pressing plate 31 is elastically pressed on the rough blank on the placement plate 2.

[0035] In the present invention, the placement process of the rough blank on the sintering mold 1 is as follows: the rough blank is placed on the placement plate 2 through the positioning rod 3, and then the cover plate 12 is covered on the mold tray 11. At this time, the pressing plate 31 elastically presses the rough blank on the placement plate 2, and the bottom of the positioning rod 3 is rotated. The positioning rod 3 drives the placement plate 2 to rotate, so that the bottom of the rough blank can be tightly attached to the placement plate 2, thereby realizing adaptive adjustment of the position of the rough blank on the placement plate 2.

[0036] In the present invention, as a preferred embodiment, the structure of the sintering mold 1 also includes a base plate 4, a plurality of guide rods 41 are provided on the cover plate 12, the base plate 4 is provided with a plurality of guide grooves 42, a buffer spring 43 is provided inside the guide groove 42, the guide rod 41 is movably arranged inside the guide groove 42 and fixedly connected to the buffer spring 43, and the pressure plate 31 is rotatably arranged on the base plate 4.

[0037] In the present invention, the upward force of the blank is transmitted to the pressing plate 31 by the base plate 4 , and the base plate 4 presses the guide rod 41 to perform elastic movement up and down in the guide groove 42 , thereby realizing the elastic movement of the pressing plate 31 up and down.

[0038] In the present invention, as a preferred solution, a docking joint 5 is provided on the top of the positioning rod 3, and a docking port 51 is provided at the center of the pressure plate 31. When the pressure plate 31 is pressed tightly on the rough blank, the docking joint 5 is positioned and clamped in the inner docking joint 5 of the docking port 51, so that the docking joint 5 synchronously drives the pressure plate 31 to rotate.

[0039] In the present invention, when the cover plate 12 is covered on the mold tray 11, the docking joint 5 is aligned and stuck in the inside of the docking port 51. On the one hand, the cover plate 12 is positioned at the covering position of the mold tray 11. On the other hand, when the positioning rod 3 drives the placement disk 2 to rotate, the docking joint 5 synchronously drives the pressure plate 31 to rotate, so that the pressure plate 31 and the placement disk 2 at the upper and lower positions of the rough blank rotate synchronously, so that the upper and lower surfaces of the rough blank can fit more closely on the pressure plate 31 and the placement disk 2.

[0040] In the present invention, as a preferred solution, the docking joint 5 and the docking port 51 are both hexagonal.

[0041] In the present invention, both the docking joint 5 and the docking port 51 are hexagonal, ensuring that the docking joint 5 can drive the docking port 51 to rotate.

[0042] In the present invention, as a preferred solution, a rotating handle 6 is provided at the bottom of the positioning rod 3 .

[0043] In the present invention, when the positioning rod 3 is rotated, the rotating handle 6 is driven to rotate manually, so that the positioning rod 3 can be rotated conveniently.

[0044] In the present invention, as a preferred solution, the placement tray 2 is circular, and surrounding side panels 7 are provided around the placement tray 2 , and the height of the side panels 7 is smaller than the positioning rod 3 .

[0045] In the present invention, the side plate 7 is provided to limit the position of the rough blank on the placement plate 2, ensuring that the formed blade blank is formed inside the side plate 7, thereby ensuring the integrity of the formed blade blank.

[0046] In the present invention, as a preferred embodiment, the coating is any one of a diamond coating, a diamond-like coating, a physical vapor deposition coating, and a titanium nitride coating.

[0047] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0048] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0049] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A process for preparing a diamond blade, characterized in that: Specifically include the following steps: S1, preparing a rough blank of a diamond blade, wherein the rough blank has an inner hole; S2, hot pressing and sintering, placing the rough blank in a sintering mold (1), wherein the sintering mold (1) is made of hot working die steel, and based on the thickness of the rough blank, the rough blank is adaptively pressed in the sintering mold (1), and then the rough blank is sintered to form a shaped blade blank; S3, rough processing, sequentially polishing the surface of the formed blade blank, wire cutting the inner hole, and grinding the outer circle of the formed blade blank to obtain a fine blade blank; S4, fine polishing, use diamond polishing pad to perform secondary polishing on both sides of the fine knife blank. During the secondary polishing process, continuously add cerium oxide polishing powder until both sides of the fine knife blank are bright; S5, coating, after the fine polishing of the fine blade blank is completed, coating is applied on the surface; In the step S2, a blank placement plate (2) is provided at the center of the sintering mold (1), and the blank placement plate (2) is rotated so that the blank is adaptively pressed in the sintering mold (1); The sintering mold (1) comprises a mold tray (11) and a cover plate (12); a rotatable positioning rod (3) is provided at the center of the mold tray (11); the placement plate (2) is fixed on the positioning rod (3); the bottom of the positioning rod (3) extends below the mold tray (11); the inner hole of the rough blank passes through the positioning rod (3) and is placed on the placement plate (2); the cover plate (12) is provided with a pressing plate (31) that can elastically move up and down; when the cover plate (12) is closed on the mold tray (11), the pressing plate (31) elastically presses the rough blank on the placement plate (2); In the steps S3 and S4, the first polishing and the second polishing do not change the thickness of the fine blade blank; A docking joint (5) is provided at the top of the positioning rod (3), and a docking port (51) is provided at the center of the pressing plate (31). When the pressing plate (31) is pressed against the rough blank, the docking joint (5) is positioned and clamped inside the docking port (51), so that the docking joint (5) synchronously drives the pressing plate (31) to rotate.

2. A process for preparing a diamond blade according to claim 1, characterized in that: The structure further comprises a base plate (4), the cover plate (12) being provided with a plurality of guide rods (41), the base plate (4) being provided with a plurality of guide grooves (42), the guide grooves (42) being provided with buffer springs (43), the guide rods (41) being movably arranged inside the guide grooves (42) and being fixedly connected to the buffer springs (43), and the pressing plate (31) being rotatably arranged on the base plate (4).

3. The process for preparing a diamond blade according to claim 1, characterized in that: The docking joint (5) and the docking port (51) are both hexagonal.

4. The process for preparing a diamond blade according to claim 1, characterized in that: A rotating handle (6) is provided at the bottom of the positioning rod (3).

5. The process for preparing a diamond blade according to claim 1, characterized in that: The placement plate (2) is circular, and surrounding side plates (7) are provided around the placement plate (2), wherein the height of the side plates (7) is smaller than that of the positioning rods (3).

6. The process for preparing a diamond blade according to claim 1, characterized in that: The coating is any one of a diamond coating, a diamond-like coating, and a titanium nitride coating.

Images