A wire cutting machine

Abstract

The utility model relates to a kind of line cutting machine, including cutting chamber, multiple guide pulleys located in cutting chamber, line net arranged to guide pulley and sealing device located at the end of guide pulley, wherein, sealing device generates airflow at the end of guide pulley, airflow prevents foreign matter from entering line net interior through the end of guide pulley.Using the present scheme, the present scheme generates airflow at the end of guide pulley by setting sealing device at the end of guide pulley, and the airflow forms a barrier and guide to foreign matter, preventing foreign matter and the like from entering the line net interior along the end of guide pulley, which protects the line net, effectively improving the service life of the line net, line net slot and guide pulley, thereby ensuring cutting quality to improve the stability of the line cutting machine when in use.

Description

Technical Field

[0001] This utility model relates to the field of single-crystal silicon wire cutting technology, and in particular to a wire cutting machine. Background Technology

[0002] Multi-wire cutting machines are a type of precision machining equipment widely used in industries such as semiconductors and photovoltaics. Their working principle is that the guide wheel drives the diamond wire to reciprocate at high speed through rotation, and with the assistance of cutting fluid, the workpiece is cut.

[0003] The rotation of the guide wheel generates a vortex force, which causes foreign objects such as cutting fluid to enter the wire mesh under the action of the vortex force, damaging the wire groove and affecting the cutting quality. Utility Model Content

[0004] Based on this, a wire cutting machine is provided to solve the problem in the prior art where, when the guide wheel rotates, the cutting fluid enters the wire mesh through the end of the guide wheel, thus affecting the cutting quality.

[0005] On one hand, this utility model provides a wire cutting machine, including: a cutting chamber, a plurality of guide rollers located inside the cutting chamber, a wire mesh arranged on the guide rollers, and a sealing device located at the end of the guide rollers, wherein,

[0006] The sealing device generates airflow at the end of the guide wheel, which prevents foreign objects from entering the wire mesh through the end of the guide wheel.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] In one implementation, the sealing device generates an upward airflow that surrounds the end of the guide wheel.

[0009] In one implementation, the sealing device includes: a flow guide located below the end of the guide wheel, and having a hollow cavity and a plurality of air outlets disposed on the side wall of the flow guide and communicating with the hollow cavity.

[0010] In one implementation, the guide is elongated and sealed at one end, while the other end is connected to the air source.

[0011] In one implementation, the length direction of the guide element is perpendicular to the axial direction of the guide wheel.

[0012] In one implementation, the air vents are evenly spaced along the length of the guide.

[0013] In one implementation, the vent is located on the side wall of the upper part of the guide.

[0014] In one implementation, the sealing device further includes:

[0015] The auxiliary support has at least a horizontal support surface extending along the length of the guide member, and the guide member is disposed on the horizontal support surface.

[0016] In one implementation, the sealing device further includes:

[0017] The main support is fixed inside the cutting chamber and has a hollow structure. The auxiliary support is set on the main support.

[0018] In one implementation, the wire cutter also includes:

[0019] The drainage box, which is installed on the main support and communicates with the hollow structure of the main support, at least guides foreign objects that are prevented from entering the wire mesh by the airflow of the sealing device into the hollow structure of the main support.

[0020] The beneficial effects of this utility model are as follows: When the cutting machine is running, the rotating guide wheel easily generates a rotating airflow, which makes it easy for foreign objects such as cutting fluid in the wire cutting chamber to enter the wire mesh area from the end of the guide wheel under the action of the airflow, thereby damaging the wire groove and affecting the cutting quality. This solution, by setting a sealing device at the end of the guide wheel, generates airflow at the end of the guide wheel, which forms a barrier and guide for foreign objects, preventing them from entering the wire mesh along the end of the guide wheel, thus protecting the wire mesh and effectively improving the service life of the wire mesh, wire mesh groove and guide wheel, thereby ensuring cutting quality and improving the stability of the wire cutting machine during use. Attached Figure Description

[0021] Figure 1 This is a partial structural diagram of a multi-wire cutting machine in one embodiment;

[0022] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0023] Figure 3 This is a schematic diagram of the sealing device in one embodiment;

[0024] Figure 4 This is a partial structural schematic diagram of the sealing device in one embodiment;

[0025] Figure 5 A partial cross-sectional view illustrating the relative positions of the guide wheel and the sealing device in one embodiment;

[0026] Figure 6 This is a schematic diagram of the gas flow direction and the rotation direction of the guide wheel in one embodiment;

[0027] Figure 7 This is a partial structural diagram of a multi-wire cutting machine in another embodiment;

[0028] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B.

[0029] Appendix Figure 1-5 and attached Figure 7-8 In the diagram, the components represented by each number are as follows:

[0030] 1. Guide wheel;

[0031] 2. Sealing device;

[0032] 211. Air guide; 211-1. Air outlet;

[0033] 212. Plug; 213. Regulating valve;

[0034] 22. Auxiliary support; 23. Main support;

[0035] 24. Drainage box;

[0036] 4. Cutting chamber; 5. Drain outlet; 6. Wire mesh;

[0037] Appendix Figure 6 In the diagram, the components represented by each number are as follows:

[0038] a. The arrow indicates the direction of rotation of the guide wheel;

[0039] b. Vertical lines indicate the direction of airflow when it is blown out from the guide. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit its scope. It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. The structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0041] A wire cutting machine, see Figure 1 and Figure 2 It includes a cutting chamber 4, multiple guide wheels 1 located in the cutting chamber 4, a wire mesh 6 arranged on the guide wheels 1, and a sealing device 2 located at the end of the guide wheels 1, wherein the sealing device 2 generates airflow at the end of the guide wheels 1, and the airflow prevents foreign objects from entering the wire mesh 6 through the end of the guide wheels 1.

[0042] With this solution, during operation, the rotating guide wheel 1 easily generates a rotating airflow, which can cause foreign objects such as cutting fluid in the wire cutting chamber 4 to easily enter the wire mesh 6 area from the end of the guide wheel 1, thus damaging the wire groove and affecting the cutting quality. This solution addresses this by installing a sealing device 2 at the end of the guide wheel 1. The sealing device 2 generates airflow at the end of the guide wheel 1, which blocks and guides foreign objects, preventing them from entering the wire mesh 6 along the end of the guide wheel 1. This protects the wire mesh 6, effectively extending the service life of the wire mesh 6, the wire mesh 6 groove, and the guide wheel 1, thereby ensuring cutting quality and improving the stability of the wire cutting machine during operation. Furthermore, the structural design of this application occupies little space, avoiding increases in equipment size and cost, and has a wide range of applications.

[0043] See Figure 7 and Figure 8 The positional relationship between the wire mesh 6, the sealing device 2, and the guide wheel 1 can be clearly seen in the figure. The wire mesh 6 is tightly arranged on the guide wheel 1, and in order to prevent the wire mesh at the edge of the guide wheel 1 from being affected by the side wall of the cutting chamber, a blank area without wire mesh is left at the end of the guide wheel 1. This blank area forms a channel connecting the outside and inside of the wire mesh. During the wire cutting process, the rotating airflow generated by the rotation of the guide wheel will cause foreign objects such as cutting fluid in the cutting chamber to enter the inside of the wire mesh from the blank area, enter the wire groove, damage the wire groove, and affect the cutting quality.

[0044] In the embodiments, see Figure 2 The sealing device 2 generates airflow at the end of the guide wheel 1, which blocks and guides foreign objects, preventing them from entering the wire mesh 6 along the end of the guide wheel 1 and thus protecting the wire mesh 6. In this embodiment, the arrangement of the sealing device 2 is not specifically limited, nor is the direction of the gas blown out by the sealing device 2 restricted, as long as it is different from the direction of the rotating airflow generated by the rotation of the guide wheel and can guide foreign objects away from the opening at the end of the guide wheel. Furthermore, the airflow blown out by the sealing device 2 can also form a gas barrier surface, effectively shielding the end of the guide wheel 1.

[0045] In the prior art, see Figure 6 The rotation direction of the guide wheel is shown by arrow a. The rotation of guide wheel 1 generates a rotating airflow in the same direction as arrow a. Foreign matter such as cutting fluid in the cutting chamber will enter the wire mesh from the end of guide wheel 1 under the action of the rotating airflow. In some embodiments, see... Figure 5 and Figure 6 The sealing device 2 generates a vertically upward airflow, such as Figure 6As shown in Figure b, the airflow surrounds the end of the guide wheel 1. In this way, the upward airflow forms an airflow barrier surface surrounding the end of the guide wheel 1 from bottom to top. Foreign objects such as cutting fluid at the end of the guide wheel 1 move upward under the action of the vertical upward airflow of the sealing device 2, and counteract the rotating airflow generated by the rotation of the guide wheel 1, thus preventing them from being carried into the wire mesh by the rotating airflow, thereby effectively improving the protection effect of the wire mesh 6.

[0046] In some embodiments, see Figure 3 and Figure 4 The sealing device 2 includes a flow guide 211, which is located below the end of the guide wheel 1 and has a hollow cavity and multiple air outlets 211-1 disposed on the side wall of the flow guide 211 and communicating with the hollow cavity. In this way, the hollow cavity of the guide member 211 is used for the introduction of gas. The guide member 211 includes an air outlet 211-1, which has multiple outlets and is connected to the hollow cavity of the guide member 211. The air outlet 211-1 is used for the blowing out of gas and forms an airflow barrier surface. The guide member 211 with the hollow cavity is convenient for storing gas, thereby ensuring the gas output of each outlet 211-1 so that the formed barrier surface is dense and has a good shielding effect. The gas is blown out of the guide member 211 through the outlet 211-1. Along the arrangement of the outlets 211-1 and the gas output direction, a continuous and dense barrier and guiding airflow is formed to prevent impurities from entering the interior of the wire mesh 6.

[0047] In the embodiments, see Figure 3 and Figure 4 The diameter of the vent 211-1 can be 0.5mm.

[0048] In some embodiments, see Figure 3 and Figure 4 The guide element 211 is elongated and sealed at one end, while the other end is connected to the gas source. This allows gas to enter the guide element 211 along the gas source, and then the gas is blown out along the air outlet 211-1 opened on the guide element 211 to form a gas flow path.

[0049] In some embodiments, see Figure 5 and Figure 6 The length direction of the guide member 211 is perpendicular to the axial direction of the guide wheel 1. This ensures that the airflow generated by the gas blown out by the guide member 211 effectively surrounds the guide wheel 1, thus providing all-round protection. In this way, foreign objects can be prevented from entering the wire mesh 6 area of ​​the cutting line from the end of the guide wheel 1, ensuring the stability and safety of the cutting process. At the same time, this layout also helps to keep the wire mesh 6 clean and dry, reducing the risk of damage or performance degradation of the wire mesh 6 due to contact with foreign objects.

[0050] See Figure 6The air guide rotates clockwise, and the air outlet direction of the air guide 211 is in the vertical direction and surrounds the guide wheel when it blows to the guide wheel 1.

[0051] In this embodiment, the length direction of the guide member 211 is perpendicular to the axial direction of the guide wheel 1, and the length of the guide member 211 is greater than the diameter of the guide wheel 1, so as to ensure that the gas blown out by the guide member 211 covers a sufficiently large area of ​​the end of the guide wheel 1.

[0052] In some embodiments, see Figure 4 The air outlets 211-1 are evenly spaced along the length of the guide member 211. In this way, the guide member 211 is elongated, and the air outlets 211-1 are arranged along the length of the guide member 211 to ensure the width of the airflow blown out by the formed sealing device. This allows the cutting fluid in the area covered by the airflow to move from bottom to top under the guidance of the airflow, preventing it from entering the wire mesh from the end of the guide wheel 1.

[0053] In some embodiments, see Figure 5 The airflow blown out along the air outlet 211-1 forms an airflow blocking surface. Regarding the direction of the blocking surface, the blocking surface can be set perpendicular to the axis of the guide wheel 1, or the blocking surface can have a certain angle with the axis of the guide wheel 1, such as an acute angle. Regarding the shape of the blocking surface, as long as the blocking surface forms a tight planar blocking airflow, the shape of the blocking surface is not restricted. For example, the blocking surface can be a plane and the corresponding air outlet 211-1 is arranged in a straight line, or the blocking surface can be a curved surface and the corresponding air outlet 211-1 is not arranged in the same straight line.

[0054] In the embodiments, see Figure 5 The airflow obstruction surface is planar and perpendicular to the axis of guide wheel 1. In this way, the direction of the obstruction surface is defined. When the obstruction surface is planar, the obstruction surface can be utilized to the maximum extent and its thickness can be reduced, thereby reducing the space occupied by the obstruction surface in the multi-wire cutting machine.

[0055] In some embodiments, the air outlet 211-1 is disposed on the side wall of the upper side of the guide member 211. This allows the air outlet 211-1 to blow air upward along the top of the guide member 211.

[0056] In some embodiments, one end of the guide member 211 is sealed by a plug 212, and the other end is connected to the gas source through a regulating valve 213. Thus, the middle part of the guide member 211 is used to contain gas; the guide member 211 is formed into a hollow structure with open ends, such that one end of the guide member 211 is connected to the plug 212, and the other end of the guide member 211 is connected to the gas source through the regulating valve 213; the hollow structure with open ends of the guide member 211 simplifies the manufacturing process and reduces costs.

[0057] In the embodiments, see Figure 4The guide element 211 has a thin-walled structure, which increases the volume of gas contained inside the guide element 211, and also achieves the effect of weight reduction and material saving.

[0058] In the embodiments, see Figure 4 The sealing device 2 includes a regulating valve 213, which is located between the air source and the guide member 211. The regulating valve 213 is used to regulate the air volume. In this way, the regulating valve 213 is set to facilitate the control of the gas flow rate, thereby controlling the air volume according to the specific operating conditions inside the cutting machine, which facilitates expanding the application range of the sealing device 22.

[0059] For details, see Figure 4 The regulating valve 213 can be an L-shaped regulating valve 213. The structural features and technical effects of the L-shaped regulating valve 213 are as follows: its valve body and valve core are L-shaped. By rotating or moving the valve core, the cross-sectional area of ​​the gas flow channel is changed. When the valve core is in different positions, the size of the opening through which the gas can pass changes, thereby achieving the regulation of the gas flow rate. During the process of gas flowing through the L-shaped regulating valve 213, the L-shaped channel will produce a throttling effect on the gas. Due to the change in the shape and size of the channel, the gas will be subject to a certain resistance when flowing, thereby changing the gas pressure and flow rate. The L-shaped regulating valve 213 can also control the flow direction of the gas.

[0060] Compared to the ordinary control valve 213, the advantages of the L-shaped control valve 213 are: the gas in the ordinary control valve 213 usually flows in a linear direction, while the L-shaped control valve 213 can make the gas flow direction change significantly; in addition, the flow regulation of the L-shaped control valve 213 is relatively sensitive, and a large flow change can be caused by a small change in the valve core opening.

[0061] In some embodiments, see Figure 3 The sealing device 2 also includes an auxiliary support 22, which has at least a horizontal support surface extending along the length of the guide member 211, and the guide member 211 is disposed on the horizontal support surface. In this way, the position of the sealing device 2 is fixed by the auxiliary support 22 to determine the position of the guide member 211, so that the upward airflow blown out by the guide member 211 closely surrounds the circumference of the guide wheel 1.

[0062] In some embodiments, see Figure 3 The sealing device 2 also includes a main support 23, which is fixed inside the cutting chamber and has a hollow structure. An auxiliary support 22 is mounted on the main support 23. In this way, the main support 23 supports the auxiliary support 22, thereby fixing the position of the guide member 211.

[0063] In this embodiment, the cutting chamber 4 of the wire cutting machine is equipped with three guide wheels 1. The three guide wheels 1 are axially parallel to each other and arranged in a triangular structure with the first and second guide wheels 1 on top and the third guide wheel 1 located below the middle position of the first and second guide wheels 1. After diamond wire is wound around the three guide wheels 1, the first guide wheel 1, the second guide wheel 1, the third guide wheel 1, and the diamond wire together form the internal space of the wire mesh. The main support 23 is inverted V-shaped and has two inclined bottom legs, which facilitates the fixing of the main support 23 inside the cutting machine; the first guide wheel 1 and the second guide wheel 1 are located on both sides of the bottom legs of the main support 23, and the third guide wheel 1 is located between the two bottom legs of the main support 23. The auxiliary support 22 is fixed to the bottom leg of the main support 23. To ensure a horizontal support surface, the auxiliary support 22 is triangular. The first side of the triangle is fixed to the bottom leg of the main support 23 according to its inclination. The second side is horizontal, forming a horizontal support surface. The third side connects the first and second sides. Thus, the auxiliary support 22 is located below the first and second guide wheels 1, placing the sealing device below them as well. The sealing device generates an upward airflow below the first and second guide wheels 1. This airflow is directed away from the internal space of the wire mesh, allowing foreign matter such as cutting fluid to be kept away from the internal space of the wire mesh by this airflow, preventing it from entering.

[0064] In one embodiment, the wire cutting machine further includes a drainage box 24. The main support 23 is a hollow, thin-walled tubular structure with openings at both the top and bottom. The drainage box 24 is located above the top of the main support 23 and is also a thin-walled structure. The hollow structure of the drainage box 24 communicates with the hollow structure of the main support 23, at least guiding foreign objects prevented from entering the wire mesh by the airflow of the sealing device 2 into the hollow structure of the main support 23. After the airflow of the sealing device guides foreign objects such as cutting fluid away from the internal space of the wire mesh from bottom to top, they can enter the drainage box 24. The cutting fluid entering the drainage box 24 flows out sequentially from the hollow structures of the drainage box 24 and the main support 23.

[0065] In the embodiments, see Figure 3The drainage box 24 is a polygonal box-shaped structure including a first opening and a second opening. The first opening is located on the top surface of the drainage box 24; the second opening is located on the side of the drainage box 24 facing the guide wheel 1. The cutting fluid during the operation of the multi-wire cutting machine enters the drainage box 24 through the first and second openings, then enters the main support 23 and flows out along the bottom of the main support 23. Thus, the top surface of the drainage box 24 has a first opening to allow the cutting fluid blown by the sealing device 2 or splashed cutting fluid to enter the drainage box 24 through the first opening at the top of the drainage box 24; the drainage box 24 has a second opening on the side near the guide wheel 1 to allow the cutting fluid splashed on the guide wheel 1 and inside the cutting machine to enter the drainage box 24 through the second opening and flow out; in addition, the drainage box 24 is located in the middle of the main support 23, and the sealing devices 2 fixed on the two auxiliary supports 22 are located on both sides of the main support 23, so that the drainage box 24 simultaneously serves to drain the fluid from the sealing devices 2 on both sides.

[0066] In the embodiments, see Figure 3 and Figure 5 There are two auxiliary supports 22 that are symmetrically fixed on the main support 23, and the corresponding guide wheels 1 are symmetrically arranged on both sides of the main support 23.

[0067] In the embodiments, see Figure 3 and Figure 5 The main support 23 has a hollow tubular structure, such as a square or round tube, which facilitates the flow of cutting fluid along the inside of the main support 23 while also reducing weight; the auxiliary support 22 has a thin plate-like structure, such as an L-shaped structure.

[0068] In the embodiments, see Figure 1 The multi-wire cutting machine also includes a drain port 5, which is located in the middle of the bottom surface of the cutting chamber 4. This drain port 5 is designed to allow the cutting fluid to drain from the bottom of the cutting machine, preventing it from accumulating there.

[0069] Among them, see Figure 1 An inclined guide slope extends from the inner periphery of the bottom of the cutting chamber 4 toward the drain port 5. This makes the drain port 5 the lowest point of the bottom of the cutting chamber 4, so as to facilitate the accumulation of cutting fluid at the bottom of the multi-wire cutting machine and enter the drain port 5 along the guide slope, and then flow out from the drain port 5.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0072] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. The embodiments described above merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A wire cutting machine, characterized in that, include: The cutting chamber, a plurality of guide wheels (1) located within the cutting chamber, a wire mesh (6) arranged on the guide wheels (1), and a sealing device (2) located at the ends of the guide wheels, wherein, The sealing device (2) generates airflow at the end of the guide wheel, and the airflow prevents foreign objects from entering the wire mesh (6) through the end of the guide wheel (1).

2. The wire cutting machine according to claim 1, characterized in that, The sealing device (2) generates an upward airflow that surrounds the end of the guide wheel (1).

3. The wire cutting machine according to claim 1, characterized in that, The sealing device (2) includes: a flow guide (211), which is located below the end of the guide wheel (1) and has a hollow cavity and a plurality of air outlets (211-1) disposed on the side wall of the flow guide (211) and communicating with the hollow cavity.

4. The wire cutting machine according to claim 3, characterized in that, The guide (211) is long and narrow, with one end sealed and the other end connected to the air source.

5. The wire cutting machine according to claim 4, characterized in that, The length direction of the guide member (211) is perpendicular to the axial direction of the guide wheel (1).

6. The wire cutting machine according to claim 5, characterized in that, The air outlets (211-1) are evenly spaced along the length of the guide (211).

7. The wire cutting machine according to claim 6, characterized in that, The air outlet (211-1) is located on the side wall of the upper side of the guide (211).

8. The wire cutting machine according to claim 3, characterized in that, The sealing device (2) further includes: Auxiliary support (22) having at least a horizontal support surface extending along the length direction of the guide (211), the guide (211) being disposed on the horizontal support surface.

9. The wire cutting machine according to claim 8, characterized in that, The sealing device (2) further includes: The main support (23) is fixed inside the cutting chamber and has a hollow structure. The auxiliary support (22) is mounted on the main support (23).

10. The wire cutting machine according to claim 9, characterized in that, The wire cutting machine also includes: A drainage box (24) is disposed on the main support (23) and communicates with the hollow structure of the main support (23). It at least guides the foreign matter that is prevented from entering the wire mesh by the airflow of the sealing device (2) to the hollow structure of the main support (23).

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