A machine tool wire wheel device for KDP and DKDP crystal wire cutting machine

Abstract

The present application relates to a kind of machine tool wire wheel devices for KDP and DKDP crystal wire cutting machine, the device includes left mounting plate, left mounting frame, top mounting frame, right mounting frame, right mounting plate and several wire wheels etc..When cutting KDP and DKDP crystal, the present application plays the role of increasing transmission efficiency, reducing wire wheel wear and reducing line jitter when running.The present application improves the stability when cutting KDP and DKDP crystal through tension control system, and the tension control of cutting can be adjusted, can improve the flatness of KDP and DKDP crystal cutting surface cut out, using the stable air thrust output provided by cylinder, can avoid or reduce the vibration of diamond wire when cutting.

Description

Technical Field

[0001] This invention patent belongs to the field of cutting technology, specifically relating to a machine tool wire wheel device for KDP crystal and DKDP crystal wire cutting machines. Background Technology

[0002] Among optical functional crystal materials, potassium dihydrogen phosphate crystals (KDP and DKDP crystals) possess excellent properties such as high nonlinearity and laser damage threshold. These crystals are key crystal materials for high-power lasers and are often used as crystal materials for optical frequency doublers and optoelectronic switching elements in high-power lasers. Large-aperture KDP and DKDP crystal elements are core components of inertial confinement laser fusion.

[0003] Currently available KDP and DKDP crystal cutting machines have a large sheave spacing, which makes the cutting wire prone to vibration and unstable tension during movement. Furthermore, the excessive wrap angle of the sheaves makes the cutting wire prone to breakage, reducing its lifespan. Additionally, because KDP and DKDP crystals are soft and brittle materials, it is difficult to cut a smooth surface. Since crystal cutting plays a crucial role as the first step in machining, the cutting yield, surface quality, and subsurface quality all directly impact the final cost. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a wire wheel device for wire cutting machines used for KDP and DKDP crystals. This device increases transmission efficiency, reduces wire wheel wear, and minimizes wire vibration during operation when cutting KDP and DKDP crystals. Simultaneously, it reduces stress during the cutting process, effectively minimizing crystal deformation. Furthermore, the drive of this wire wheel device is located on the side of the machine rather than in the center, allowing for better tension control.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A machine tool wire wheel assembly for KDP and DKDP crystal wire cutting machines, the assembly comprising a left mounting plate, a left mounting bracket, a top mounting bracket, a right mounting bracket, and a right mounting plate. The left and right mounting brackets are used to mount the driven wheel and support the top mounting bracket. The left and right mounting brackets are symmetrically mounted relative to the top mounting bracket and are secured using threaded connections.

[0007] Furthermore, the left mounting plate is equipped with a drive spool, a first driven spool, a ninth driven spool, and a tenth driven spool. The drive spool is used to drive the movement of the diamond cutting wire on each spool. The left mounting plate is both the starting point and the ending point of the diamond cutting wire's movement. The wrap angle between the drive spool and the diamond cutting wire should reach 160°~180° to increase friction and prevent the diamond cutting wire from slipping during crystal cutting.

[0008] Furthermore, a second driven wheel is provided on the left mounting bracket. A third, fourth, fifth, and sixth driven wheel are provided on the top mounting bracket, and a seventh driven wheel is provided on the right mounting bracket. This arrangement of driven wheels increases transmission efficiency and reduces wire vibration during operation. The wrap angle between all the aforementioned driven wheels and the diamond cutting wire should be between 45° and 90° to minimize wear on the diamond cutting wire during the cutting process.

[0009] Furthermore, the third and sixth driven wheels on the top mounting bracket should be tangent to the upper edge of the top mounting bracket, and the fourth and fifth driven wheels should be tangent to the lower edge of the top mounting bracket. The angle between the line connecting the axes of the third and fourth driven wheels and the horizontal line is between 30° and 60°, and the angle between the line connecting the axes of the fifth and sixth driven wheels and the horizontal line is also between 30° and 60°.

[0010] Furthermore, the right mounting plate is fixed with an eighth driven wheel, a fixed plate, a cylinder, and a tension wheel guide rail. A displacement sensor is mounted on the fixed plate, and a ranging rod is located on top of the displacement sensor. One end of a connecting plate is connected to the ranging rod, and the other end is connected to a pneumatic actuator. The tail of the pneumatic actuator is connected to the cylinder, and the top is connected to the guide rail connector. The tension wheel and the guide rail connector are connected together and mounted on the tension wheel guide rail. The displacement sensor allows for precise measurement of the slider's displacement, enabling precise adjustment of the tension wheel to accommodate diamond cutting wires of different lengths and models, ensuring the diamond cutting wire remains taut at all times.

[0011] Furthermore, the diamond cutting wire used to cut the crystal passes sequentially through the active wire wheel, the first passive wheel, the second passive wheel, the third passive wheel, the fourth passive wheel, the fifth passive wheel, the sixth passive wheel, the seventh passive wheel, the tension wheel, the eighth passive wheel, the ninth passive wheel, and the tenth passive wheel, and finally returns to the active wire wheel.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] Existing KDP and DKDP crystal cutting machines are bulky, cut small crystals, and have low space utilization. This invention uses diamond wire loops, which are fixed to the machine according to the position of the wire pulley. This increases space utilization and allows for the cutting of large-sized KDP and DKDP crystals.

[0014] This invention uses diamond toroidal wire, which makes wire replacement more convenient and simple compared to existing long single-wire winding technology.

[0015] This invention features a unique tension control system that, compared to existing KDP and DKDP cutting technologies, can improve the stability of KDP and DKDP crystal cutting. Furthermore, the tension control during cutting is adjustable, which can improve the flatness of the cut surface of the KDP and DKDP crystals.

[0016] The tension control of this invention uses a cylinder to provide a stable air thrust output. Because it uses air thrust, this tension control system has good anti-vibration performance and can avoid or reduce vibration of diamond wire during cutting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the machine tool reel device of the present invention.

[0018] Figure 2 This is a structural diagram of the tension control system of the machine tool thread pulley device of the present invention.

[0019] In the diagram: 1-Left mounting plate; 2-Left mounting bracket; 3-Top mounting bracket; 4-Right mounting bracket; 5-Right mounting plate; 6-Driving reel; 7-First driven reel; 8-Ninth driven reel; 9-Tenth driven reel; 10-Second driven reel; 11-Third driven reel; 12-Fourth driven reel; 13-Fifth driven reel; 14-Sixth driven reel; 15-Seventh driven reel; 16-Eighth driven reel; 17-Displacement sensor; 18-Cylinder; 19-Guide rail connector; 20-Connecting plate; 21-Tension wheel guide rail; 22-Tension wheel; 23-Fixing plate; 24-Distance measuring rod; 25-Cylinder connector; 26-Pneumatic actuator; 27-Diamond cutting wire. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the scope of protection of the present invention.

[0021] Example

[0022] like Figure 1As shown, a machine tool wire sheave device for KDP and DKDP crystal wire cutting machines includes a left mounting plate 1, a left mounting bracket 2, a top mounting bracket 3, and a right mounting bracket 4; wherein the active wire sheave 6, the first passive sheave 7, the ninth passive sheave 8, and the tenth passive sheave 9 are mounted on the left mounting plate 1; the second passive sheave 10 is mounted on the left mounting bracket 2; the third passive sheave 11, the fourth passive sheave 12, the fifth passive sheave 13, and the sixth passive sheave 14 are mounted on the top mounting bracket 3; and the seventh passive sheave 15 is mounted on the right mounting bracket 4; the right mounting plate 5 is the tension control system of the machine tool wire sheave device, and includes an eighth passive sheave 16, a displacement sensor 17, a cylinder 18, a guide rail connector 19, a connecting plate 20, a tension wheel guide rail 21, a tensioning wheel 22, a fixing plate 23, a measuring rod 24, a cylinder connector 25, and a pneumatic push rod 26;

[0023] like Figure 1 As shown, the machine tool wire reel device includes a diamond cutting wire 27. Before processing, the model and length of the diamond cutting wire 27 are determined. The diamond cutting wire 27 is first fitted into the drive reel 6, and then sequentially fitted into the tenth driven reel 9 in a clockwise order from the first driven reel 7. Before cutting begins, the cylinder 18 is opened to tighten the diamond cutting wire 27. Then, the displacement sensor 17 reads the distance the tension wheel 22 moves forward, which is the initial wire elongation. When cutting begins, the diamond cutting wire 27 starts from the drive reel 6 and rotates counterclockwise from the first driven reel 7 on the left mounting plate 1 to the second driven reel 10 on the left mounting bracket 2. The second driven reel 10 rotates clockwise, driving the diamond cutting wire 27 to the top mounting bracket 3. After the third driven reel 11 on the top mounting bracket 3 rotates clockwise, the fourth driven reel 12 rotates counterclockwise, the fifth driven reel 13 rotates counterclockwise, and the sixth driven reel 14 rotates clockwise, it is moved to the position of the right mounting bracket 4. The diamond cutting wire 27 rotates clockwise on the eighth driven wheel 16 on the right mounting bracket 4, passes through the counterclockwise rotating tension wheel 22 on the right mounting plate 5, and then re-enters the left mounting plate 1 via the clockwise rotating eighth driven wheel 16. Finally, it passes through the clockwise rotating ninth driven wheel 8 and the counterclockwise rotating tenth driven wheel 9 on the left mounting plate 1, returning to the driving wire wheel 6.

[0024] like Figure 2 As shown, the right mounting plate 5 is the tension control system for the machine tool thread pulley device; the system includes a distance measurement part and a tension control part; the right mounting plate 5 is the base of the entire system; the distance measurement part is located at the top of the right mounting plate 5 and includes a displacement sensor 17, a distance measuring rod 24 and a connecting plate 20; the tension control part is installed below the distance measurement part and includes a tension wheel 22, a cylinder 18, a pneumatic push rod 26, an eighth driven wheel 16 and a tension wheel guide rail 21.

[0025] The displacement sensor 17 is connected to the fixing plate 23. The fixing plate 23 is fixed to the right mounting plate 5 using nuts. The fixing plate 23 has multiple openings to facilitate adjustment of the position and orientation of the displacement sensor 17.

[0026] The cylinder 18 is located below the displacement sensor 17. The cylinder connector 25 is fixed together with the cylinder 18. The cylinder connector 25 has multiple openings to adjust the position and direction of the cylinder 18. After the cylinder 18 is placed parallel to the displacement sensor 17, the cylinder connector 18 is fixed to the right mounting plate 5 with nuts.

[0027] One end of the connecting plate 20 is vertically fixed to the front end of the displacement sensor ranging rod 24, and the other end is vertically fixed to the front end of the pneumatic rod 26, which can ensure that when the pneumatic rod 26 moves back and forth, it drives the ranging rod 24 to move synchronously.

[0028] like Figure 2 As shown, the tension wheel 22 is fixed together with the guide rail connector 19 and slidably connected to the tension wheel guide rail 21, which is fixed to the right mounting plate 5 by a nut. The other end of the guide rail connector 19 is engaged in the groove at the front end of the pneumatic actuator 26, connecting the pneumatic actuator 26 to the tension wheel 22. The pneumatic actuator 26 moves back and forth, causing the tension wheel 22 to slide on the tension wheel guide rail 21.

[0029] The eighth passive wheel 16 is fixed at a certain distance below the cylinder 18. The eighth passive wheel 16 and the tension wheel 22 are both placed inside the cutting line. The eighth passive wheel 16 serves as a positioning device for the cutting line to fix its position. The pneumatic push rod 26 pushes the tension wheel 22 to adjust the tension of the cutting line. At the start of cutting, an initial air pressure is applied to cylinder 18. The thrust of cylinder 18 is transmitted to tension wheel 22 via pneumatic push rod 26, which then tightens the diamond cutting wire 27. Once tightened, the diamond cutting wire 27 generates tension. After a period of cutting, the diamond cutting wire 27 will lengthen due to fatigue. As the wire lengthens, the tension decreases, and the cutting force also decreases. Consequently, the measuring rod 24 in front of displacement sensor 17 is also lengthened, causing a change in the reading of displacement sensor 17. As the sensor reading increases, the air pressure applied to cylinder 18 also increases. This increased air pressure leads to a greater thrust on the wire, which in turn increases the tension. The amount of air pressure increase is adjusted based on the increase in the sensor reading, thereby controlling the wire tension to remain within a stable range.

[0030] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, this invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of this invention, without departing from the scope of this invention, should be within the protection scope of this invention.

Claims

1. A machine tool wire wheel device for wire cutting machines of KDP and DKDP crystals, characterized in that, Includes left mounting plate (1), left mounting bracket (2), top mounting bracket (3), right mounting bracket (4), right mounting plate (5) and diamond cutting wire (27); The left mounting bracket (2) and the right mounting bracket (4) are symmetrically fixed on both sides of the top mounting bracket (3), the left mounting plate (1) is fixed at the bottom of the left mounting bracket (2), and the right mounting plate (5) is fixed at the bottom of the right mounting bracket (4). The left mounting plate (1) is provided with a drive wheel (6), a first driven wheel (7), a ninth driven wheel (8), and a tenth driven wheel (9). The left mounting bracket (2) is provided with a second driven wheel (10). The top mounting bracket (3) is fixed with a third driven wheel (11), a fourth driven wheel (12), a fifth driven wheel (13), and a sixth driven wheel (14) in sequence. The upper periphery of the third driven wheel (11) and the sixth driven wheel (14) is tangent to the upper edge of the top mounting bracket (3), and the lower periphery of the fourth driven wheel (12) and the fifth driven wheel (13) is tangent to the lower edge of the top mounting bracket (3). The angle between the line connecting the axis of the third driven wheel (11) and the axis of the fourth driven wheel (12) and the horizontal line is between 30° and 60°. The angle between the line connecting the axis of the fifth driven wheel (13) and the axis of the sixth driven wheel (14) and the horizontal line is between 30° and 60°. The included angle is also between 30° and 60°; the right mounting bracket (4) is provided with a seventh passive wheel (15), the right mounting plate (5) is fixed with an eighth passive wheel (16), a fixing plate (23) for mounting the displacement sensor (17), a cylinder (18) and a tension wheel guide rail (21), a measuring rod (24) is provided on the top of the displacement sensor (17), one end of the connecting plate (20) is connected to the measuring rod (24), and the other end is connected to the air push rod (26). The tail of the air push rod (26) is connected to the cylinder (18), and the top is connected to the guide rail connector (19). The tension wheel (22) and the guide rail connector (19) are connected together and set on the tension wheel guide rail (21); the bottom of the displacement sensor (17) is fixed on the right mounting plate (5) by the fixing plate (23), and the connecting plate (20) is vertically fixed to the front end of the measuring rod (24) of the displacement sensor (17) using a nut; The cylinder (18) is located below the displacement sensor (17) and is mounted on the right mounting plate (5) via the cylinder connector (25), keeping it parallel to the displacement sensor (17); the other end of the connecting plate (20) is vertically fixed to the front end of the pneumatic push rod (26) to ensure that the pneumatic push rod (26) and the distance measuring rod (24) move synchronously. The wrap angle between the drive spool (6) and the diamond cutting wire (27) is 160°~180°; The wrap angle between all passive wheels and the diamond cutting line (27) is 45°~90°; The eighth passive wheel (16) is fixed below the cylinder (18). The axis of the eighth passive wheel (16) is 25cm~35cm to the right and 5cm~8cm below the tension wheel (22). The eighth passive wheel (16) serves as a positioning device for the cutting line to fix its position. The pneumatic rod (26) pushes the tension wheel (22) to adjust the tension of the cutting line. The diamond cutting wire (27) passes sequentially through the driving wire wheel (6), the first passive wheel (7), the second passive wheel (10), the third passive wheel (11), the fourth passive wheel (12), the fifth passive wheel (13), the sixth passive wheel (14), the seventh passive wheel (15), the tension wheel (22), the eighth passive wheel (16), the ninth passive wheel (8), and the tenth passive wheel (9), and returns to the driving wire wheel (6).

2. The machine tool wire wheel device for KDP and DKDP crystal wire cutting machines according to claim 1, characterized in that, The tension wheel (22) is fixed together with the guide rail connector (19) and slidably connected with the tension wheel guide rail (21). A slot is made at the front end of the air push rod (26) to fix the guide rail connector (19) in the slot at the front end of the air push rod (26). The tension wheel guide rail (21) is fixed on the right mounting plate (5) by a nut.

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