Diamond wire cutting device

Abstract

The invention relates to the technical field of machining, in particular to a diamond wire cutting device which comprises a rack, a driving wheel, a driven wheel, an auxiliary wheel and a diamond wire. The axis of the driving wheel is parallel to the axis of the driven wheel, auxiliary wheels in the direction perpendicular to the axis are arranged on the side faces of the driving wheel and the driven wheel correspondingly, the auxiliary wheels support the diamond wire from the side faces, and component force of a wire bow in the direction perpendicular to the plane of the diamond wire is counteracted; and the spatial position of the rack is adjusted through the mechanical arm, and the rack is adjusted to rotate through the tail end rotating shaft. The position of the diamond wire is restrained through the auxiliary wheel, the problems of deviation, vibration and the like of the diamond wire caused by a wire bow during curve cutting are solved, controllable and stable cutting within 180 degrees can be achieved through the auxiliary wheel, and the equipment stability is improved while the cutting precision is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a diamond wire cutting device. Background Art

[0002] Diamond wire cutting machine is a kind of equipment which uses diamond wire for cutting. Its principle is to achieve cutting through the high-speed movement of diamond wire and the friction with the object to be cut.

[0003] Diamond wire cutting has a wide range of uses. It can cut a variety of metal and non-metal materials, such as ceramics, glass, crystals, etc. In the semiconductor field, it is used to process electronic components such as silicon wafers; in the photovoltaic industry, cutting silicon wafers improves battery efficiency. It is especially suitable for high-hardness, high-value, easily broken brittle crystals, and is an important processing method in modern industry.

[0004] At present, the core uses of diamond wire include slicing and cutting and blanking operations. The cut formed by its cutting presents a simple plane shape. This is attributed to the fact that when the diamond wire cuts the material and moves forward, the material will exert resistance on the diamond wire along the tangent direction of the cutting point on the curved path, thereby causing the diamond wire to form a wire bow along this direction. This wire bow forms a certain angle with the center line of the wheel groove of the cutting guide wheel. If the cut is a curve, the tangent direction of each point on the curved cutting path is bound to be different, and the direction of the wire bow generated during the cutting process will continue to change. This continuous change in the direction of the wire bow will cause the diamond wire to swing and oscillate, as well as the oscillatory changes in the cutting resistance. These changes make it difficult to control the direction and size of the wire bow, and ultimately cause the actual cutting position to deviate from the pre-set walking trajectory, resulting in a reduction in cutting accuracy. In addition, the oscillations generated during the cutting process will also cause a series of problems such as wire breakage and wire derailment, making the equipment failure rate high.

[0005] To solve the above problems, some solutions have been proposed, such as the invention patent of a diamond wire cutting device with publication number CN115008322A, which discloses a method of ensuring that the cutting direction is tangent to the cutting path by moving the workpiece to achieve complex path cutting. This method can solve the problem of continuous changes in the wire bow to a certain extent, but because the cutting wire must be tangent to the path, when the direction of the curve changes rapidly, the workpiece and the wire saw need to move significantly, which has many restrictions on the movement speed and size of the workpiece. Summary of the invention

[0006] In view of this, the present invention aims to provide a diamond wire cutting device. An auxiliary wheel is designed on the basis of the traditional diamond wire cutting device to offset the component force perpendicular to the plane of the diamond wire, thereby solving the problem of the diamond wire causing position displacement in the wire groove due to the wire bow during curve cutting, thereby improving the accuracy of the cutting curve. At the same time, since the cutting direction is not restricted, it can adapt to a wide range.

[0007] To achieve the above object, the technical solution created by the present invention is implemented as follows: The invention provides a diamond wire cutting device, comprising: a frame, a driving wheel, a driven wheel and an auxiliary wheel rotatably connected to the frame, and a diamond wire wrapped around the cylindrical surfaces of the driving wheel and the driven wheel; Wherein, the axis of the driving wheel and the axis of the driven wheel are parallel to each other; At least two auxiliary wheels are arranged between the driving wheel and the driven wheel, and the axes of the auxiliary wheels are perpendicular to the axes of the driving wheel and the driven wheel; the cylindrical surface of the auxiliary wheels abuts against the diamond wire, and the rotation direction of the cylindrical surface of the auxiliary wheels is the same as the movement direction of the diamond wire, and the auxiliary wheels are used to bear the force perpendicular to the plane of the diamond wire.

[0008] Preferably, at least one tensioning wheel is further included, and the cylindrical surface of the tensioning wheel abuts against the diamond wire to adjust the tension of the diamond wire.

[0009] Preferably, the mechanical arm is connected to the frame, the mechanical arm is used to adjust the spatial position of the frame, and the mechanical arm can drive the frame to rotate relative to the mechanical arm.

[0010] Preferably, it also includes a workpiece fixing table, a water tank and a base, the workpiece fixing table is arranged in the water tank, and the water tank is arranged on the base.

[0011] Preferably, the cylindrical surfaces of the driving wheel and the driven wheel are both provided with wire grooves for limiting the position of the diamond wire and preventing it from falling off.

[0012] Preferably, the auxiliary wheels include a first auxiliary wheel and a second auxiliary wheel, wherein the distance between the first auxiliary wheel and the driving wheel along the diamond line direction is less than the sum of the radius of the driving wheel and the radius of the first auxiliary wheel; and the distance between the second auxiliary wheel and the driven wheel along the diamond line direction is less than the sum of the radius of the driven wheel and the radius of the second auxiliary wheel.

[0013] Compared with the prior art, the invention can achieve the following beneficial effects:

[0014] The present invention designs an auxiliary wheel based on the traditional diamond wire cutting device, which can offset the component force perpendicular to the plane of the diamond wire through the auxiliary wheel. The auxiliary wheel can accurately control the position of the diamond wire, improve the accuracy of the diamond wire cutting curve, and avoid the diamond wire swinging, oscillating, and even wire breaking and derailment caused by the continuous change of the wire bow direction during the curve cutting process. In addition, the design of the auxiliary wheel allows the diamond wire cutting device to feed and cut in any direction within 180°, reducing the possibility of interference between the diamond wire and the workpiece being cut, greatly improving the adaptability of diamond wire cutting, allowing the device to adapt to more complex boundary cutting and process more diverse shapes.

[0015] The present invention realizes controllable and stable cutting within 180° through auxiliary wheels, and can effectively compensate for the bending of the wire bow, so that it can be used for cutting large-size workpieces. In addition, the bending direction and size of the wire bow are controllable and calculable. In the process of high-precision cutting, targeted compensation can be performed to further improve the accuracy of the cutting trajectory. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings: Figure 1 is a schematic diagram of the whole cutting of the diamond wire cutting device provided in an embodiment of the present invention; Figure 2 is a schematic diagram of the structure of a rack provided according to an embodiment of the present invention; Figure 3 is a force analysis diagram of a diamond wire during a curve cutting process provided by an embodiment of the present invention; Figure 4 is a force deformation diagram of the diamond wire in the X direction during the curve cutting process provided by an embodiment of the present invention; Figure 5 It is a force deformation diagram of the diamond wire in the Y direction during the curve cutting process provided by an embodiment of the present invention.

[0017] Reference numerals include: Robotic arm 1, frame 2, driving wheel 21, driven wheel 22, tensioning wheel 23, first auxiliary wheel 24, second auxiliary wheel 25, diamond wire 26, workpiece fixing platform 3, water tank 4, base 5, workpiece 6. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the invention clearer, the invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the invention and do not constitute a limitation to the invention. Similar components in different embodiments use associated similar component numbers. In the following embodiments, many detailed descriptions are to enable the invention to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other components, materials, and methods. In some cases, some operations related to the invention are not shown or described in the specification, in order to avoid the core part of the invention being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to form various implementation methods. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary sequence, unless otherwise specified that a certain sequence must be followed.

[0020] In the description of the invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0021] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] See also Figure 1 and Figure 2 In one embodiment of the present invention, a diamond wire cutting device is provided. The device is a cutting device based on a robot arm 1. The robot arm 1 can be used to position and control the cutting tool. Specifically, the device includes: a robot arm 1, a frame 2, a workpiece fixing table 3, a water tank 4 and a base 5, wherein the frame 2 is a cutting tool used to cut the workpiece 6 according to the set cutting path. The frame 2 is fixed at the end of the robot arm 1. The spatial position of the frame 2 is adjusted by the robot arm 1, and the end of the robot arm 1 can also drive the frame 2 to rotate, so that the angle of the frame 2 relative to the robot arm 1 changes. The workpiece fixing table 3 is used to fix the workpiece 6 to be cut to ensure that the workpiece 6 will not be displaced during the cutting process. The workpiece fixing table 3 is set in the water tank 4 to ensure that the waste such as high-temperature debris, sparks and liquid generated by cutting falls into the water tank 4, which is convenient for the collection and cleaning of waste on the one hand. On the other hand, it also avoids the safety hazard caused by the splashing of high-temperature waste. The water tank 4 and the robot arm 1 are both fixed on the base 5. The base 5 is used to support and fix various mechanical components, play a role in stabilizing the mechanical equipment, and ensure the normal and stable operation of the cutting device.

[0024] The frame 2 serves as a carrier for the diamond wire 26 to cut the workpiece 6, and its overall shape is a C-shaped structure. The concave area in the middle of the C structure prevents the frame 2 from obstructing the cutting of the workpiece 6 during the cutting process. The frame 2 is provided with a driving wheel 21, a driven wheel 22, a tensioning wheel 23, a first auxiliary wheel 24, a second auxiliary wheel 25 and a diamond wire 26, wherein the driving wheel 21 and the driven wheel 22 are connected to the frame 2 in a rotating manner. In addition, at least one tensioning wheel 23 is also provided on the frame 2, and the axes of the driving wheel 21, the driven wheel 22 and the tensioning wheel 23 are parallel to each other. Wire grooves are provided on the cylindrical surfaces of the driving wheel 21, the driven wheel 22 and the tensioning wheel 23, and the diamond wire 26 is wound in the cylindrical wire grooves of the driving wheel 21, the driven wheel 22 and the tensioning wheel 23. The wire groove design can effectively limit and prevent the diamond wire 26 from falling off during the operation of the cutting device. A moving path of the diamond wire 26 is formed along the driving wheel 21 , the driven wheel 22 and the tensioning wheel 23 , and a plane surrounded by the diamond wire 26 is called a diamond wire plane.

[0025] It should be noted that the position of the tension wheel 23 can be adjusted within a small range. By adjusting the tension wheel 23, the tension on the diamond wire 26 can be adjusted. It is necessary to avoid the diamond wire 26 from being derailed due to too little tension, and to avoid the diamond wire 26 from being broken due to too much tension.

[0026] It can be understood that the driving wheel 21 is the power source for the diamond wire 26 to move and cut, and is connected to the motor output shaft on the frame 2. The motor rotates to drive the driving wheel 21 to rotate, and the driving wheel 21 drives the driven wheel 22 and the tensioning wheel 23 to rotate synchronously through the diamond wire 26, thereby realizing the rapid movement of the diamond wire 26. The diamond wire 26 can cut the workpiece 6 in a high-speed movement state.

[0027] See also Figure 3 In the process of cutting the workpiece 6 with the diamond wire 26, it is inevitable to cut along a curved path. Since the reaction force F of the workpiece 6 on the diamond wire 26 during the cutting process is along the tangent direction of each point on the cutting path, with the cutting point as the origin and the cutting plane of the workpiece 6 as the xoy plane, the reaction force F on the diamond wire 26 can be decomposed into the force along the diamond wire plane. and the force perpendicular to the plane of the diamond wire , where the force This will cause the diamond wire 26 to swing and oscillate.

[0028] Since the cutting path is a curve, the direction of the reaction force F on the diamond wire 26 is constantly changing during the curve cutting process, which further causes the wire bow of the diamond wire 26 to constantly change. When the diameter of the diamond wire 26 is large, it will cause the diamond wire 26 to deviate from the preset cutting path, resulting in a decrease in cutting accuracy. Even in severe cases, it may cause the diamond wire 26 to detach from the wire groove, resulting in problems of derailment or wire stretching. For the highly moving diamond wire 26, when derailment or wire stretching occurs, there is an extremely high safety risk. In order to suppress the lateral deviation of the diamond wire 26 caused by the change of the wire bow, the embodiment of the present invention also sets at least two auxiliary wheels on the frame 2 to constrain the wire bow. Specifically, in the embodiment of the present invention, only two auxiliary wheels are designed as an example, that is, a first auxiliary wheel 24 and a second auxiliary wheel 25 abutting against the diamond wire 26 are set between the driving wheel 21 and the driven wheel 22, and the first auxiliary wheel 24 and the second auxiliary wheel 25 are both rotatably connected to the frame 2. Since the diamond wire 26 abuts against the first auxiliary wheel 24 and the second auxiliary wheel 25, the first auxiliary wheel 24 and the second auxiliary wheel 25 will be driven to rotate synchronously during the rotation of the diamond wire 26. The rotation design of the first auxiliary wheel 24 and the second auxiliary wheel 25 can effectively prevent the diamond wire 26 from cutting the first auxiliary wheel 24 and the second auxiliary wheel 25.

[0029] The first auxiliary wheel 24 is close to the driving wheel 21, and the second auxiliary wheel 25 is close to the driven wheel 22. The axis of the first auxiliary wheel 24 is perpendicular to the axis of the driving wheel 21, and the axis of the second auxiliary wheel 25 is perpendicular to the axis of the driven wheel 22. Figure 4 and Figure 5 In the process of curve cutting, the diamond wire cutting device of the embodiment of the present invention can cut at any angle within the range of 180°. In the process of the direction of the reaction force F constantly changing, the first auxiliary wheel 24 and the second auxiliary wheel 25 will always play a role of lateral support for the diamond wire 26, and the diamond wire 26 will still be affected by the component force. The influence of the wire bow is generated, and the deflection center of the diamond wire 26 in the X direction is Figure 4 In and However, the section of the diamond wire 26 from the driving wheel 21 to the first auxiliary wheel 24 will not be affected by the force The effect of is that this section of diamond wire 26 will not produce lateral wire bow, thereby ensuring that the diamond wire 26 will not escape from the wire grooves of the driving wheel 21 and the driven wheel 22, avoiding the problem of wire derailment. The lateral deflection center of the diamond wire 26 from the first auxiliary wheel 24 to the second auxiliary wheel 25 is Figure 5 In and Since the first auxiliary wheel 24 and the second auxiliary wheel 25 suppress the wire bow, this will in turn reduce the wire bow size of the diamond wire 26 from the first auxiliary wheel 24 to the second auxiliary wheel 25, and can also effectively reduce the degree of cutting deviation and improve the path cutting accuracy.

[0030] As a feasible embodiment, under normal circumstances, in order to ensure that the first auxiliary wheel 24 and the second auxiliary wheel 25 do not affect the cutting process, and at the same time, to avoid the first auxiliary wheel 24 and the second auxiliary wheel 25 from excessively suppressing the wire bow, resulting in excessive tension on the diamond wire 26 and wire breakage, the distance between the first auxiliary wheel 24 and the driving wheel 21 along the movement direction of the diamond wire 26 should be less than the sum of the radius of the driving wheel 21 and the radius of the first auxiliary wheel 24; similarly, the distance between the second auxiliary wheel 25 and the driven wheel 22 along the movement direction of the diamond wire 26 should be less than the sum of the radius of the driven wheel 22 and the radius of the second auxiliary wheel 25.

[0031] As a feasible embodiment, by designing a force sensor to measure the tension of the diamond wire 26, the wire bow size during the cutting process can be obtained. Based on the wire bow data, the robot arm 1 and the frame 2 can be adjusted to compensate for the processing trajectory, reduce the cutting error caused by the deviation of the diamond wire 26, and achieve high-precision curve cutting.

[0032] As a feasible embodiment, the diamond wire cutting device provided in the embodiment of the present invention can install the frame 2 on a CNC machine tool to achieve cutting of workpieces 6 with higher precision or larger size.

[0033] As a feasible embodiment, a retractable wire system may be configured for the diamond wire 26 to use a longer diamond wire 26 to achieve a more durable cutting effect.

[0034] In short, the above description is only a preferred embodiment of this specification and is not intended to limit the protection scope of this specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this specification shall be included in the protection scope of this specification.

[0035] The systems, devices, modules or units described in one or more of the above embodiments may be implemented by a computer chip or entity, or by a product having a certain function. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0036] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0037] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0038] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Claims

1. A diamond wire cutting device, characterized in that: include: A frame, a driving wheel, a driven wheel and an auxiliary wheel rotatably connected to the frame, and a diamond wire wrapped around the cylindrical surfaces of the driving wheel and the driven wheel; Wherein, the axis of the driving wheel and the axis of the driven wheel are parallel to each other; At least two auxiliary wheels are arranged between the driving wheel and the driven wheel, and the axes of the auxiliary wheels are perpendicular to the axes of the driving wheel and the driven wheel; the cylindrical surface of the auxiliary wheel abuts against the diamond wire, and the rotation direction of the cylindrical surface of the auxiliary wheel is the same as the movement direction of the diamond wire, and the auxiliary wheel is used to bear the force perpendicular to the plane of the diamond wire.

2. The diamond wire cutting device according to claim 1, characterized in that: It also includes at least one tensioning wheel, the cylindrical surface of which abuts against the diamond wire to adjust the tension of the diamond wire.

3. The diamond wire cutting device according to claim 1, characterized in that: It also includes a mechanical arm, which is connected to the frame. The mechanical arm is used to adjust the spatial position of the frame, and the mechanical arm can drive the frame to rotate relative to the mechanical arm.

4. The diamond wire cutting device according to claim 3, characterized in that: It also includes a workpiece fixing platform, a water tank and a base. The workpiece fixing platform is arranged in the water tank, and the water tank is arranged on the base.

5. The diamond wire cutting device according to claim 1, characterized in that: Wire grooves for limiting the position of the diamond wire and preventing it from falling off are provided on the cylindrical surfaces of the driving wheel and the driven wheel.

6. The diamond wire cutting device according to claim 1, characterized in that: The auxiliary wheels include a first auxiliary wheel and a second auxiliary wheel, wherein the distance between the first auxiliary wheel and the driving wheel along the diamond wire direction is less than the sum of the radius of the driving wheel and the radius of the first auxiliary wheel; and the distance between the second auxiliary wheel and the driven wheel along the diamond wire direction is less than the sum of the radius of the driven wheel and the radius of the second auxiliary wheel.

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