Yarn tightening device of micro-cutting machine and jade micro-cutting machine

Abstract

The utility model relates to the technical field of micro-cutting machines, in particular to a wire tightening device of a micro-cutting machine and a jade micro-cutting machine, the wire tightening device comprises a machine base, a wire cylinder and a tensioning assembly, the wire cylinder is used for winding cutting wires, the wire cylinder and the machine base are assembled in a rotating mode, the tensioning assembly comprises an upper swing arm and an upper pressing wheel, and the upper swing arm and the upper pressing wheel are arranged on the machine base. One end of the upper swing arm is rotationally assembled with the machine base, the upper pressing wheel is rotationally assembled at the other end of the upper swing arm, the upper pressing wheel abuts against the cutting line and is used for pressing the cutting line, the cutting line is a micro-diamond line, the outer ring wall of the wire cylinder is wound with multiple circles of cutting line, and the cutting line is arranged on the outer ring wall of the wire cylinder. The upper pressing wheel is tightly pressed above the cutting line through the gravity of the upper pressing wheel, the structure is simple, the possibility that the upper pressing wheel moves under the acting force of the cutting line when tensioning the cutting line is reduced, the cutting line is kept stable in the cutting process, the cutting line is kept in a stable tensioning state in the cutting process, and the cutting efficiency is improved. And the cutting precision and the cutting quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-cutting machines, in particular to a wire tightening device for a micro-cutting machine and a jade micro-cutting machine. Background Art

[0002] A micro-cutting machine utilizes the hardness and wear resistance characteristics of a cutting wire. By driving the cutting wire to contact the object to be cut through the rotation of a wire spool, the cutting wire scrapes on the surface of the object to be cut, thereby achieving cutting. Since a large amount of heat is generated during the cutting process, it is necessary to spray a coolant to reduce the heat during cutting and ensure the cutting quality and the service life of the cutting wire.

[0003] A micro-cutting machine is a high-efficiency and high-precision cutting device, widely used in the cutting and processing of hard materials such as stone, glass, and silicon wafers. Especially in occasions that require high precision and high-quality cutting, such as the processing of jade, the micro-cutting machine plays an important role. The shapes of natural jade are mostly irregular or cannot meet the specific requirements of jewelry processing. Therefore, before jade is used for jewelry processing, it needs to be cut and processed by a micro-cutting machine to be cut into specific sizes and shapes to form exquisite jewelry or artworks.

[0004] During the processing of a micro-cutting machine, the tightness of the cutting wire directly affects the cutting quality and efficiency. If the cutting wire is too loose, it will cause the cutting wire to shake during cutting, affecting the cutting accuracy and stability. If the cutting wire is too tight, it will increase the wear of the cutting wire, shorten the service life of the cutting wire, and at the same time increase the energy consumption of the cutting machine and reduce the cutting efficiency. Therefore, the micro-cutting machine in the prior art is provided with a tensioning wheel, and the cutting wire is located on the tensioning wheel, and the cutting wire is tensioned by the movement of the tensioning wheel. In this way, the tensioning wheel is under pressure, and under the action of the cutting wire, it is easy for the tensioning wheel to move, thereby reducing the tensioning effect. Secondly, since the acting force of the cutting wire is on the tensioning wheel, it is difficult to control the adjustment amount when adjusting the tensioning wheel, and the operation is difficult, affecting the tensioning adjustment efficiency of the cutting wire. Content of the Utility Model

[0005] In order to optimize the tensioning method of the cutting wire and improve the tensioning effect of the cutting wire, the present application provides a wire tightening device for a micro-cutting machine and a jade micro-cutting machine.

[0006] The wire tightening device for a micro-cutting machine and the jade micro-cutting machine provided by the utility model adopt the following technical solutions:

[0007] In the first aspect, the utility model provides a wire tightening device for a micro-cutting machine, adopting the following technical solutions:

[0008] A wire tensioning device for a micro-cutting machine, comprising a machine base, a wire cylinder, and a tensioning assembly. The wire cylinder is used for winding a cutting wire, and the wire cylinder is rotationally assembled with the machine base. The tensioning assembly includes an upper swing arm and an upper pressing wheel. One end of the upper swing arm is rotationally assembled with the machine base, and the upper pressing wheel is rotationally assembled at the other end of the upper swing arm. The upper pressing wheel abuts against the cutting wire and is used for pressing the cutting wire tightly.

[0009] Preferably, the axis of the upper pressing wheel is arranged parallel to the axis of the wire cylinder, and the upper pressing wheel is located above the wire cylinder.

[0010] Preferably, a limiting groove is formed on the outer ring wall of the upper pressing wheel, and the cutting wire is located in the limiting groove and moves back and forth.

[0011] Preferably, the outer ring wall of the upper pressing wheel has an annular protrusion, and the limiting groove is located on the annular protrusion.

[0012] Preferably, the machine base further includes a support frame and a base. The wire cylinder is rotatably assembled with the support frame, and the support frame is horizontally slidably assembled with the base.

[0013] Preferably, a plurality of groups of counterweight blocks are further included. The counterweight blocks are detachably assembled with the upper swing arm and are arranged close to the upper pressing wheel.

[0014] Preferably, the tensioning assembly further includes a lower swing arm, a lower top wheel, and a tensioning motor. The fixed end of the tensioning motor is connected to the machine base. One end of the lower swing arm is axially connected to the rotating end of the tensioning motor, and the lower top wheel is rotationally assembled at the other end of the lower swing arm. The lower top wheel is located below the wire cylinder and is used for tightly pressing the cutting wire.

[0015] Preferably, a distance sensor and a processor are further included. The distance sensor is assembled on the machine base and is used for detecting the swinging distance of the upper swing arm. The distance sensor is electrically connected to the processor, and the processor is electrically connected to the tensioning motor and is used for outputting a rotation signal.

[0016] Preferably, an upper wire wheel and an upper wire frame are further included. One end of the upper wire frame is rotationally assembled with the machine base and is located on the side of the wire cylinder away from the tensioning assembly, and the upper wire wheel is rotationally assembled at the other end of the upper wire frame.

[0017] In a second aspect, the present utility model provides a jade micro-cutting machine, adopting the following technical solution: A jade micro-cutting machine includes the wire tensioning device of the above-mentioned micro-cutting machine, and further includes a cutting device for cutting jade. The wire tensioning device and the cutting device are arranged at intervals, and the cutting wire is wound between the wire tensioning device and the cutting device.

[0018] The beneficial effects of the present utility model are:

[0019] It is pressed tightly above the cutting wire by the gravity of the upper pressing wheel, with a simple structure, reducing the possibility of the upper pressing wheel moving under the action of the cutting wire when tensioning the cutting wire, keeping the cutting wire stable during the cutting process, maintaining a stable tension state of the cutting wire during the cutting process, improving the cutting accuracy and cutting quality. Secondly, by adding or reducing the counterweight block to change the downward pressure of the upper pressing wheel, it is convenient for the operator to adjust the tension of the cutting wire, suitable for adjusting the tightness of different cutting wires, and meeting the cutting requirements of different materials.

[0020] Through the cooperation of the upper pressing wheel and the lower jacking wheel, the real-time monitoring and dynamic adjustment of the tension degree of the cutting wire are realized, keeping the best tension state of the cutting wire, making the cutting process smoother, improving the cutting efficiency and productivity. Secondly, the linkage effect of the upper pressing wheel and the lower jacking wheel ensures the uniform tension of the cutting wire in the up and down directions, improving the stability of the cutting process. The uniform and moderate tension helps to reduce the wear of the cutting wire and extend the service life of the cutting wire. In addition, the lower jacking wheel automatically tensions, reducing the need for manual adjustment, simplifying the operation process, and reducing the operation difficulty.

[0021] Through the integrated design of the wire feeding wheel and the machine base, it is convenient to replace the cutting wire during the machining process of the micro-cutting machine, enabling the operator to quickly complete the replacement of the cutting wire, reducing the downtime of the equipment, and improving the production efficiency. Brief Description of the Drawings

[0022] Figure 1 is the front perspective view in the present application;

[0023] Figure 2 is the rear perspective view in the present application;

[0024] Figure 3 is the front view in the present application;

[0025] Figure 4 is the rear view of the wire tightening device in the present application;

[0026] Figure 5 is the sectional perspective view in the present application;

[0027] Figure 6 is Figure 5 the partial enlarged view at A in

[0028] Figure 7 is the partial perspective view in the present application;

[0029] Figure 8 is Figure 7 the right view in

[0030] Figure 9 isFigure 7 The top view in

[0031] Figure 10 is a schematic diagram of two sets of cutting areas in Embodiment 2 of the present application.

[0032] Explanation of reference numerals in the drawings: 1, machine base; 101, support frame; 1011, sliding lead screw; 1013, driving wheel; 1014, driven wheel; 1015, belt; 102, base; 103, first cover; 104, transverse movement frame; 1041, transverse movement lead screw; 105, longitudinal movement frame; 1053, longitudinal movement lead screw motor; 106, second cover; 107, third cover; 108, outer cover; 2, wire spool; 201, cutting wire; 202, rotating motor; 301, upper swing arm; 3011, insertion rod; 302, upper pressing wheel; 3021, limiting groove; 3022, annular protrusion; 303, counterweight; 304, lower swing arm; 305, lower top wheel; 306, tensioning motor; 307, distance sensor; 4, upper wire wheel; 401, upper wire frame; 501, reversing wheel; 5011, first reversing wheel; 5012, second reversing wheel; 5013, third reversing wheel; 5014, fourth reversing wheel; 5015, fifth reversing wheel; 5021, first cutting area; 5022, second cutting area; 5023, third cutting area; 503, upper guide wheel; 504, lower guide wheel; 6, receiving member; 601, cutting motor. Detailed implementation manners

[0033] This part will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, so as to be able to intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0034] In the description of the present application, if it involves orientation description, such as "upper", "lower", "front", "rear", "left", "right", etc., the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application 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, so it cannot be understood as a limitation on the present application. When a certain feature is referred to as "set", "fixed", "connected" to another feature, it can be directly set, fixed, connected to another feature, or indirectly set, fixed, connected to another feature.

[0035] In the description of the present application, if "several" is involved, it means one or more; if "multiple" is involved, it means more than two; if "greater than", "less than", or "exceeding" is involved, it should be understood as not including the number itself; if "above", "below", or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0036] In addition, unless otherwise defined, the technical terms and scientific terms used in the present application shall have the same meanings as those commonly understood by those skilled in the technical field to which the present application pertains. The terms used in the present application are only for describing specific embodiments and are not intended to limit the present application. It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0037] Example 1: As Figure 1-9 shown, a wire tensioning device for a micro-cutting machine includes a machine base 1, a wire reel 2, and a tensioning assembly. The wire reel 2 is used for winding a cutting wire 201, and the wire reel 2 is rotationally assembled with the machine base 1. The tensioning assembly includes an upper swing arm 301 and an upper pressing wheel 302. One end of the upper swing arm 301 is rotationally assembled with the machine base 1, and the upper pressing wheel 302 is rotationally assembled at the other end of the upper swing arm 301. The upper pressing wheel 302 abuts against the cutting wire 201 and is used for pressing the cutting wire 201. The cutting wire 201 is a micro-diamond wire. Multiple turns of the cutting wire 201 are wound around the outer circumferential wall of the wire reel 2. By rotating the wire reel 2 forward and backward, the cutting wire 201 moves back and forth, thereby realizing the cutting function. The tensioning method of using the gravity of the upper pressing wheel 302 to press the cutting wire 201 has a simple structure and good pressing effect. When the cutting wire 201 moves back and forth by rotating the wire reel 2 forward and backward, the cutting wire 201 is in a tensioned state, thereby improving the cutting effect. By pressing the gravity of the upper pressing wheel 302 above the cutting wire 201, the structure is simple, and when the upper pressing wheel 302 tensions the cutting wire 201, the possibility of moving due to the acting force of the cutting wire 201 is reduced, so that the cutting wire 201 remains stable during the cutting process, and the cutting wire 201 remains in a stable tensioned state during the cutting process, improving the cutting accuracy and cutting quality.

[0038] In terms of the assembly position of the upper pressing wheel 302, the axis of the upper pressing wheel 302 is arranged parallel to the axis of the wire cylinder 2, and the upper pressing wheel 302 is located above the wire cylinder 2. One end of the upper swing arm 301 rotatably assembled with the machine base 1 is located obliquely above the upper pressing wheel 302. Both the upper swing arm 301 and the upper pressing wheel 302 are located obliquely above the wire cylinder 2. The upper pressing wheel 302 swings with the length of the upper swing arm 301 as the radius, so as to realize the tensioning of the cutting wire 201.

[0039] In order to improve the pressing stability of the upper pressing wheel 302 on the cutting wire 201 and prevent the cutting wire 201 from deviating from the upper pressing wheel 302 when the cutting wire 201 moves back and forth, a limiting groove 3021 is provided on the outer ring wall of the upper pressing wheel 302. The cutting wire 201 is located in the limiting groove 3021 and moves back and forth. By providing the limiting groove 3021, when the cutting wire 201 moves back and forth, the limiting groove 3021 plays a role in limiting the cutting wire 201, preventing the cutting wire 201 from detaching from the upper pressing wheel 302, so as to ensure the stability of the pressing action of the upper pressing wheel 302 on the cutting wire 201.

[0040] If the cutting wire 201 is wound around the wire cylinder 2 at the same axial position, it will cause the cutting wire 201 to be stacked radially with each other. When the wire cylinder 2 rotates, the diameter of each turn of the cutting wire 201 is different, so that the pressing stroke of the tensioning component is in a dynamic change process, which is not conducive to the stable cutting of the cutting wire 201. In order to solve the above technical problems and make the pressing stroke of the pressing component tend to be stable, the cutting wire 201 needs to be wound around the outer ring wall of the wire cylinder 2 at equal intervals along the axis of the wire cylinder 2. Therefore, the machine base 1 further includes a support frame 101 and a base 102. The wire cylinder 2 is rotatably assembled with the support frame 101, and the support frame 101 is horizontally slidably assembled with the base 102. When the wire cylinder 2 rotates, the support frame 101 moves horizontally, that is, moves along the axis of the wire cylinder 2, so as to wind the cutting wire 201 around the outer ring wall of the wire cylinder 2 at equal intervals. When the wire cylinder 2 rotates back and forth, the diameter of the cutting wire 201 wound around the wire cylinder 2 is limited, so that the pressing stroke of the pressing component tends to be stable. At the same time, the position of the cutting wire 201 passing through the upper pressing wheel 302 is determined and the same, so as to reduce the axial length of the upper pressing wheel 302 and the axial length of the limiting groove 3021. Preferably, the axial length of the limiting groove 3021 is 1.2-1.5 times the outer diameter of the cutting wire 201.

[0041] In terms of the specific structure of the sliding of the support frame 101 and the base 102, this embodiment further includes a sliding lead screw 1011 and a sliding block. The sliding block is threadedly connected with the sliding lead screw 1011, and the support frame 101 is connected to the sliding block. In order to improve the stability of the horizontal movement of the support frame 101, a slide rail and slider are provided between the support frame 101 and the base 102. Specifically, the slide rail is connected to the base 102, one end of the slider is connected to the support frame 101, and the other end of the slider is slidably assembled with the slide rail.

[0042] In terms of the specific structure for driving the wire spool 2 to rotate, this embodiment further includes a driving wheel 1013, a driven wheel 1014, a belt 1015, and a rotating motor 202. The rotating motor 202 is assembled on the support frame 101 for rotating the wire spool 2. The driving wheel 1013 is axially connected to the wire spool 2, and the driven wheel 1014 is axially connected to the sliding lead screw 1011. The belt 1015 is wound between the driving wheel 1013 and the driven wheel 1014 and is used to transmit torque, thereby realizing the interlocking control of the rotation of the wire spool 2 and the movement of the wire spool 2, and improving the smoothness of the wire spool 2 for winding and unwinding the cutting wire 201.

[0043] In terms of the specific structure for controlling the reciprocating movement of the cutting wire 201 when the wire spool 2 rotates, this embodiment further includes locking screws for connecting the cutting wire 201 to the wire spool 2. There are two sets of locking screws, and the two sets of locking screws are respectively screwed at both ends of the wire spool 2 in the axial direction. One end of the cutting wire 201 is wound around the outer wall of one set of locking screws. By tightening this locking screw, the connection between one end of the cutting wire 201 and the wire spool 2 is completed. Then, rotate the wire spool 2 and cooperate with the movement of the support frame 101 to make the cutting wire 201 evenly wound around the outer wall of the axis of the wire spool 2. Similarly, wind the other end of the cutting wire 201 around the outer wall of the other set of locking screws. By tightening this locking screw, the connection between the other end of the cutting wire 201 and the wire spool 2 is completed.

[0044] Since the inner wall of the limiting groove 3021 of the upper pressing wheel 302 abuts against the cutting wire 201, the wear rate at the limiting groove 3021 is faster than that of the outer wall of the upper pressing wheel 302. Therefore, the outer wall of the upper pressing wheel 302 has an annular protrusion 3022, and the limiting groove 3021 is located on the annular protrusion 3022. The annular protrusion 3022 can adopt a quenching process to improve the hardness of the annular protrusion 3022, thereby reducing the wear rate and improving the service life. By adopting local quenching treatment, the production and manufacturing cost of the upper pressing wheel 302 is reduced. Or, the annular protrusion 3022 is made of hard alloy, such as tungsten steel, and is nested on the outer wall of the upper pressing wheel 302 to form the annular protrusion 3022. By setting different materials, the wear degree at the limiting groove 3021 is reduced.

[0045] To further enhance the pressing effect of the upper pressing wheel 302 on the cutting wire 201 and ensure that the cutting wire 201 is in a tensioned state, this embodiment further includes several sets of counterweight blocks 303. The counterweight blocks 303 are detachably assembled with the upper swing arm 301 and are arranged close to the upper pressing wheel 302. By providing the counterweight blocks 303, the downward pressure of the upper pressing wheel 302 is increased, thereby enhancing the tensioning effect on the cutting wire 201. The counterweight blocks 303 are detachably assembled with the upper swing arm 301, so that the magnitude of the downward pressure can be changed by increasing or decreasing the number of counterweight blocks 303, and the downward pressure of the upper pressing wheel 302 is enhanced.

[0046] In terms of the specific assembly structure of the counterweight 303 and the upper swing arm 301, the counterweight 303 is provided with a communication hole, and the upper swing arm 301 is provided with an insertion rod 3011 protruding upward. The counterweight 303 is detachably assembled with the insertion rod 3011 through its communication hole.

[0047] In order to further enhance the tensioning effect of the tensioning assembly on the cutting wire 201, the tensioning assembly further includes a lower swing arm 304, a lower idler wheel 305, and a tensioning motor 306. The fixed end of the tensioning motor 306 is connected to the machine base 1. One end of the lower swing arm 304 is pivotally connected to the rotating end of the tensioning motor 306. The lower idler wheel 305 is rotatably assembled at the other end of the lower swing arm 304. The lower idler wheel 305 is located below the wire reel 2 and is used to press against the cutting wire 201. By rotating the tensioning motor 306, the lower swing arm 304 is driven to swing downward towards the cutting wire 201, so that the lower idler wheel 305 presses upward against the cutting wire 201, thereby achieving the tensioning effect of the cutting wire 201. When the wire reel 2 rotates to make the cutting wire 201 move back and forth, the tensioning assembly tensions the upper and lower ends of the cutting wire 201. Since the lower idler wheel 305 is driven by the tensioning motor 306, even if the cutting wire 201 is located above the lower idler wheel 305, the tensioning motor 306 can provide the torque for the lower idler wheel 305 to overcome the cutting wire 201 and move the lower idler wheel downward, thereby ensuring the stability of the lower idler wheel 305 pressing against the cutting wire 201.

[0048] In order to enhance the linkage effect between the upper pressing wheel 302 and the lower pressing wheel 305, so as to achieve the tension stability of the cutting wire 201, this embodiment further includes a distance sensor 307 and a processor. The distance sensor 307 is assembled on the machine base 1 and is used to detect the swing distance of the upper swing arm 301. The distance sensor 307 is electrically connected to the processor, and the processor is electrically connected to the tensioning motor 306 and is used to output a rotation signal. The distance sensor 307 is an inductive distance sensor. The distance sensor 307 is located below the upper swing arm 301. Since the upper pressing wheel 302 presses the cutting wire 201 by gravity, it is a floating pressing, while the lower pressing wheel 305 presses the cutting wire 201 by the rotation angle of the tensioning motor 306, which is a micro-quantitative pressing. When the cutting wire 201 is in a loose state, the upper pressing wheel 302 drives the upper swing arm 301 to move downward under the action of gravity. At this time, the distance sensor 307 detects the movement signal of the lower swing arm 304 and inputs the signal to the processor. The processor outputs a rotation signal to the tensioning motor 306, and the tensioning motor 306 rotates to drive the lower swing arm 304 to rotate upward, and the lower pressing wheel 305 presses the cutting wire 201 tightly. As the wire reel 2 rotates, the tension of the cutting wire 201 is transmitted to the upper pressing wheel 302 to overcome the gravity of the upper pressing wheel 302, causing the upper swing arm 301 to move away from the distance sensor. Thus, the dynamic adjustment of the tension degree of the cutting wire 201 is realized. Through the cooperation of the distance sensor 307 and the processor, the real-time monitoring and dynamic adjustment of the tension degree of the cutting wire 201 can be achieved, maintaining the best tension state of the cutting wire 201, making the cutting process smoother, improving the cutting efficiency and productivity. Secondly, the linkage effect between the upper pressing wheel 302 and the lower pressing wheel 305 ensures the uniform tension of the cutting wire 201 in the up and down directions, improving the stability of the cutting process. The uniform and appropriate tension helps to reduce the wear of the cutting wire 201 and extend the service life of the cutting wire 201. In addition, the lower pressing wheel 305 automatically tensions, reducing the need for manual adjustment, simplifying the operation process, and reducing the operation difficulty.

[0049] The cutting wire 201 is wound on the upper wire wheel 4 in a roll. In the prior art, the upper wire wheel 4 and the micro-cutting machine are designed separately. When the cutting wire 201 breaks and needs to be replaced with a new one, it is time-consuming and laborious to find the upper wire wheel 4 to complete the threading. In order to facilitate winding the cutting wire 201 from the upper wire wheel 4 to the wire reel 2, this embodiment further includes an upper wire wheel 4 and an upper wire rack 401. One end of the upper wire rack 401 is rotatably assembled with the machine base 1 and is located on the side of the wire reel 2 away from the tensioning assembly. The upper wire wheel 4 is rotatably assembled at the other end of the upper wire rack 401. The upper wire wheel 4 is integrally designed with the micro-cutting machine, which is convenient for replacing the cutting wire 201 during the processing of the micro-cutting machine. Through the integral design of the upper wire wheel 4 and the machine base 1, the time for finding the upper wire wheel 4 is saved, the replacement of the cutting wire 201 is quickly completed, the downtime of the equipment is reduced, and the production efficiency is improved.

[0050] To improve the safety of the operation, this embodiment further includes a first cover 103, which covers the outside of the wire reel 2 and the tensioning assembly, reducing the risk of injury caused by the breakage of the cutting wire 201 during movement.

[0051] Embodiment 2: As Figure 1-10 shown, a cutting device of a micro-cutting machine includes a machine base 1, a wire reel 2 around which a cutting wire 201 is wound, and a wire transmission wheel set for transmitting the cutting wire 201. The wire reel 2 is rotationally assembled with the machine base 1 and is used for winding and unwinding the cutting wire 201. The conveying wheel set includes at least four sets of reversing wheels 501, and the four sets of reversing wheels 501 are arranged in pairs, one above the other. One end of the cutting wire 201 is connected to the wire reel 2, and the other end of the cutting wire 201 is sequentially wound around the outer ring walls of the reversing wheels and then connected to the wire reel 2, forming at least two cutting areas. Through the arrangement of multiple sets of reversing wheels 501 and the improvement of the wire winding method of the cutting wire 201, one cutting wire 201 can form at least two cutting areas and is driven by the same wire reel 2. When the wire reel 2 rotates, at least two objects to be cut can be cut simultaneously, improving the cutting efficiency.

[0052] Through the arrangement of multiple sets of reversing wheels 501, one cutting wire 201 can form at least two cutting areas, realizing the simultaneous cutting of at least two objects to be cut, greatly improving the cutting efficiency and production progress. Secondly, compared with the traditional method of requiring multiple sets of wire reels 2 for multiple cutting wires 201, the designed multi-wire cutting device only needs one wire reel 2 to realize the coordinated operation of multiple cutting wires 201, reducing the equipment cost and operation cost. The cutting wires 201 in the multi-wire cutting device are driven by the same wire reel 2, improving the convenience of equipment operation and the stability of the cutting process. Moreover, the multi-wire cutting device can ensure the uniform tension and stable operation between multiple sets of cutting wires 201, improving the cutting quality and accuracy, and ensuring the consistency of the cutting processing quality.

[0053] To improve the stability of the wire transmission wheel set in transmitting the cutting wire 201, an annular wire guiding groove is formed on the outer ring wall of the wheel body of the wire transmission wheel set, and the cutting wire 201 moves back and forth in the annular wire guiding groove.

[0054] To improve the smoothness of the cutting wire 201 being transported from the wire reel 2 to the reversing wheel 501, the wire transmission wheel set further includes an upper guide wheel 503, which is arranged between the wire reel 2 and the wire-changing wheel. The upper guide wheel 503 is located above the wire reel 2 and is externally tangent to the wire reel 2. By externally tangent setting of the upper guide wheel 503 and the wire reel 2, the smoothness of the cutting wire 201 moving back and forth between the wire reel 2 and the upper guide wheel 503 is improved.

[0055] In terms of the specific layout structure of the reversing wheel 501 and the upper guide wheel 503, the two sets of reversing wheels 501 located above include the first reversing wheel 5011 and the fourth reversing wheel 5014. The first reversing wheel 5011 and the upper guide wheel 503 are arranged at intervals. The vertical top wall of the first reversing wheel 5011 is externally tangent to the vertical top wall of the upper guide wheel 503, and the tangent line is parallel to the tabletop of the machine base 1. The fourth reversing wheel 5014 is arranged between the first reversing wheel 5011 and the upper guide wheel 503 and is located below this tangent line. One end of the cutting line 201 winds around above the upper guide wheel 503 after leaving the wire cylinder 2, winds around above the first reversing wheel 5011 after passing through the upper guide wheel 503. The fourth reversing wheel 5014 is arranged between the first reversing wheel 5011 and the upper guide wheel 503 and is located below this tangent line, which can prevent the risk of the cutting lines 201 contacting and interfering with each other when the cutting line 201 is sent back to the wire cylinder 2.

[0056] Preferably, the outer diameter of the upper guide wheel 503 is equal to the outer diameter of the reversing wheel 501.

[0057] In terms of the specific layout position of the two sets of reversing wheels 501 located below, the two sets of reversing wheels 501 located below include the second reversing wheel 5012. The second reversing wheel 5012 is located directly below the first reversing wheel 5011 and is externally tangent to the first reversing wheel 5011. The cutting line 201 winds around the first reversing wheel 5011 and the second reversing wheel 5012 to form the first cutting area 5021. One end of the cutting line 201 winds around above the upper guide wheel 503 after leaving the wire cylinder 2, winds around above the first reversing wheel 5011 after passing through the upper guide wheel 503. The cutting line 201 passes below the second reversing wheel 5012 after passing through the first reversing wheel 5011. Since the second reversing wheel 5012 is located directly below the first reversing wheel 5011 and is externally tangent to the first reversing wheel 5011, the cutting line 201 in the first cutting area 5021 is perpendicular to the tabletop of the machine base 1, which is convenient for cutting the object to be cut.

[0058] In terms of the specific arrangement positions of the two lower sets of reversing wheels 501, the two lower sets of reversing wheels 501 further include a third reversing wheel 5013. The axis of the third reversing wheel 5013 is on the same horizontal line as the axis of the second reversing wheel 5012. The third reversing wheel 5013 is located between the fourth reversing wheel 5014 and the second reversing wheel 5012, and the third reversing wheel 5013 is externally tangent to the fourth reversing wheel 5014. The cutting line 201 is wound around the third reversing wheel 5013 and the fourth reversing wheel 5014 to form a second cutting area 5022. Specifically, when the projection of the wire-changing wheel on the tabletop of the machine base 1, the first reversing wheel 5011 coincides with the second reversing wheel 5012. The third reversing wheel 5013 is located between the fourth reversing wheel 5014 and the second reversing wheel 5012. One end of the cutting line 201 winds around above the upper guide wheel 503 after coming from behind the wire spool 2, winds around above the first reversing wheel 5011 after passing through the upper guide wheel 503, passes under the second reversing wheel 5012 after passing through the first reversing wheel 5011, then passes under the third reversing wheel 5013, and passes above the fourth reversing wheel 5014 after passing through the third reversing wheel 5013. Since the third reversing wheel 5013 is externally tangent to the fourth reversing wheel 5014, the cutting line 201 of the second cutting area 5022 is perpendicular to the tabletop of the machine base 1, that is, the cutting line 201 of the second cutting area 5022 is parallel to the cutting line 201 of the first cutting area 5021, which facilitates cutting two sets of objects to be cut simultaneously and is conducive to controlling the cutting accuracy. Secondly, the axis of the third reversing wheel 5013 is on the same horizontal line as the axis of the second reversing wheel 5012, which improves the smoothness of the movement of the cutting line 201, thereby improving the cutting efficiency. Furthermore, by adjusting the center distance between the third reversing wheel 5013 and the third reversing wheel 5013, the distance between the cutting line 201 of the first cutting area 5021 and the cutting line 201 of the second cutting area 5022 is adjusted, so as to be compatible with the lengths of different objects to be cut.

[0059] In order to further increase the number of cutting areas and thus improve the cutting efficiency, the conveying wheel set includes a lower guide wheel 504 and five groups of reversing wheels 501. The axis of the fifth reversing wheel 5015 is on the same horizontal line as the axis of the fourth reversing wheel 5014 and is located between the fourth reversing wheel 5014 and the upper guide wheel 503. The tangent line between the vertical bottom wall of the lower guide wheel 504 and the vertical bottom wall of the wire drum 2 is parallel to the tabletop of the machine base 1. The lower guide wheel 504 is located below the fifth reversing wheel 5015 and is externally tangent to the fifth reversing wheel 5015. The cutting wire 201 is wound around the fifth reversing wheel 5015 and the lower guide wheel 504 to form a third cutting area 5023. The five groups of reversing wheels are the first reversing wheel 5011, the second reversing wheel 5012, the third reversing wheel 5013, the fourth reversing wheel 5014, and the fifth reversing wheel 5015. One end of the cutting wire 201 is wound around above the upper guide wheel 503 after leaving the wire drum 2, passes through the upper guide wheel 503 and then is wound around above the first reversing wheel 5011. After passing through the first reversing wheel 5011, the cutting wire 201 passes below the second reversing wheel 5012, then passes below the third reversing wheel 5013. After passing through the third reversing wheel 5013, the cutting wire 201 passes above the fourth reversing wheel 5014. After passing through the third reversing wheel 5013, the cutting wire 201 then passes above the fifth reversing wheel 5015. After passing through the fifth reversing wheel 5015, the cutting wire 201 passes below the lower guide wheel 504. Since the lower guide wheel 504 is externally tangent to the fifth reversing wheel 5015, the cutting wire 201 in the third cutting area 5023 is perpendicular to the tabletop of the machine base 1, that is, the cutting wire 201 in the third cutting area 5023 is parallel to the cutting wire 201 in the second cutting area 5022, so as to facilitate cutting three groups of objects to be cut simultaneously and facilitate controlling the cutting accuracy. Secondly, the tangent line between the vertical bottom wall of the lower guide wheel 504 and the vertical bottom wall of the wire drum 2 is parallel to the tabletop of the machine base 1, improving the smoothness of the movement of the cutting wire 201 between the lower guide wheel 504 and the wire drum 2, thus improving the cutting efficiency.

[0060] Preferably, the outer diameter of the lower guide wheel 504 is equal to the outer diameter of the reversing wheel 501.

[0061] When the cutting wire 201 cuts the object to be cut, a fixture is required to clamp the object to be cut. This embodiment further includes a receiving member 6 for fixing the object to be cut. The machine base 1 further includes a moving frame and a base 102. The moving frame is slidably assembled with the base 102. The receiving member 6 is assembled on the moving frame. The receiving member 6 is arranged corresponding to the cutting area. The moving frame slides along the base 102 to move the receiving member 6 back and forth towards the cutting wire 201, so as to complete the cutting operation of the object to be cut on the receiving member 6.

[0062] In terms of the specific structure of the assembly between the moving frame and the base 102, the moving frame includes a transverse moving frame 104 and a longitudinal moving frame 105. The transverse moving frame 104 slides horizontally on the longitudinal moving frame 105 through a transverse lead screw and nut, and the longitudinal moving frame 105 slides longitudinally on the base 102 through a longitudinal lead screw and nut. Through the horizontal and longitudinal movement of the moving frame, the horizontal and longitudinal movement of the receiving member 6 is realized, so as to complete the cutting feed of the object to be cut and the adjustment of the cutting depth.

[0063] In terms of the specific structure of the transverse moving frame 104 sliding horizontally on the longitudinal moving frame 105 through a transverse lead screw and nut, it further includes a transverse lead screw 1041, a transverse nut, and a transverse lead screw 1041 motor. The transverse lead screw 1041 is rotationally assembled with the longitudinal moving frame 105, the transverse lead screw 1041 motor is assembled on the longitudinal moving frame 105 for rotating the transverse lead screw 1041, the transverse nut is threadedly connected to the transverse lead screw 1041, the transverse moving frame 104 is connected to the transverse nut, and a transverse slide rail and slider are also provided between the transverse moving frame 104 and the longitudinal moving frame 105.

[0064] In terms of the specific structure of the longitudinal moving frame 105 sliding longitudinally on the base 102 through a longitudinal lead screw and nut, it further includes a longitudinal lead screw, a longitudinal nut, and a longitudinal lead screw motor 1053. The longitudinal lead screw is rotationally assembled with the base 102, the longitudinal lead screw motor 1053 is assembled on the base 102 for rotating the longitudinal lead screw, the longitudinal nut is threadedly connected to the longitudinal lead screw, the longitudinal moving frame 105 is connected to the longitudinal nut, and a longitudinal slide rail and slider are also provided between the longitudinal moving frame 105 and the base 102.

[0065] In order to further improve the cutting efficiency, this embodiment further includes a cutting motor 601 for rotating the receiving member 6. The fixed end of the cutting motor 601 is connected to the transverse moving frame 104, and the rotating end of the cutting motor 601 is axially connected to the receiving member 6. It is worth mentioning that the receiving member 6 is arranged in a disc shape. Through the rotation of the object to be cut and the movement of the cutting wire 201, the cutting efficiency is improved. Specifically, when there are three cutting areas, there are three groups of receiving members 6. The receiving member 6 is located on the right side of the cutting wire 201, that is, at the end far from the wire drum 2, and the rotation direction of the middle group of receiving members 6 is opposite to that of the other two groups of receiving members 6.

[0066] The receiving member 6 can rotate quickly, cooperate with the movement of the cutting wire 201, control the rotation speed and direction of the receiving member 6, ensure the accuracy and cutting quality of the cutting process, and improve the cutting efficiency. Secondly, the setting of the disc-shaped receiving member 6 can accommodate multiple objects to be cut at the same time, increasing the processing amount per unit time.

[0067] To improve the safety of the operation, this embodiment further includes a second cover 106, a third cover 107, and an outer cover 108. The second cover 106 covers the outer sides of the upper guide pulley 503, the fifth reversing pulley 5015, the fourth reversing pulley 5014, and the first reversing pulley 5011. The third cover 107 covers the outer sides of the second reversing pulley 5012, the third reversing pulley 5013, and the lower guide pulley 504. The outer cover 108 covers the outer sides of the second cover 106, the third cover 107, the receiving member 6, and the cutting motor 601, and the outer cover 108 is located on the transverse moving frame 104, reducing the risk of injury caused by the breakage of the cutting wire 201 during movement.

[0068] Embodiment 3: As Figure 1-10 shown, a jade micro-cutting machine includes a wire tightening device of a micro-cutting machine for winding and unwinding a cutting wire 201 in Embodiment 1 and a cutting device of a micro-cutting machine for cutting jade in Embodiment 2. The wire tightening device and the cutting device are arranged at intervals, and the cutting wire 201 is wound between the wire tightening device and the cutting device. The cutting device includes a receiving member 6 for fixing the jade to be cut, and the cutting wire 201 is a micro-diamond wire.

[0069] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A wire tightening device for a micro-cutting machine, characterized in that: It includes a machine base, a wire reel, and a tensioning assembly. The wire reel is used to wind the cutting line, and the wire reel is rotatably assembled with the machine base. The tensioning assembly includes an upper swing arm and an upper pressure wheel. One end of the upper swing arm is rotatably assembled with the machine base, and the upper pressure wheel is rotatably assembled on the other end of the upper swing arm. The upper pressure wheel abuts against the cutting line and is used to press the cutting line.

2. The wire tightening device of a micro-cutting machine according to claim 1, characterized in that: The axis of the upper pressing wheel is arranged parallel to the axis of the wire drum, and the upper pressing wheel is located above the wire drum.

3. The wire tightening device of a micro-cutting machine according to claim 1, characterized in that: The outer ring wall of the upper pressing wheel is provided with a limiting groove, and the cutting line is located in the limiting groove and moves back and forth.

4. The wire tightening device of a micro-cutting machine according to claim 3, characterized in that: The outer ring wall of the upper pressing wheel has an annular protrusion, and the limiting groove is located on the annular protrusion.

5. The wire tightening device of a micro-cutting machine according to claim 1, characterized in that: The machine base also includes a support frame and a base. The wire drum and the support frame are rotatably assembled, and the support frame and the base are transversely slidably assembled.

6. The wire tightening device of a micro-cutting machine according to claim 1, characterized in that: It also includes a plurality of groups of counterweight blocks, which are detachably assembled with the upper swing arm and are arranged close to the upper pressure wheel.

7. The wire tightening device of a micro-cutting machine according to claim 1, characterized in that: The tensioning assembly also includes a lower swing arm, a lower top wheel, and a tensioning motor. The fixed end of the tensioning motor is connected to the machine base, one end of the lower swing arm is axially connected to the rotating end of the tensioning motor, and the lower top wheel is rotatably assembled with the other end of the lower swing arm. The lower top wheel is located below the wire reel and is used to tighten the cutting line.

8. The wire tightening device of a micro-cutting machine according to claim 7, characterized in that: It also includes a distance sensor and a processor. The distance sensor is mounted on the machine base and is used to detect the swing distance of the upper swing arm. The distance sensor is electrically connected to the processor. The processor is electrically connected to the tensioning motor and is used to output a rotation signal.

9. The wire tightening device of a micro-cutting machine according to claim 1, characterized in that: It also includes an upper wire wheel and an upper wire rack. One end of the upper wire rack is rotatably assembled with the machine base and is located on a side of the wire drum away from the tensioning assembly. The upper wire wheel is rotatably assembled on the other end of the upper wire rack.

10. A jade micro-cutting machine, characterized in that: It comprises a wire tightening device of a micro-cutting machine as described in any one of claims 1 to 9, and also comprises a cutting device for cutting jade, wherein the wire tightening device and the cutting device are arranged at an interval, and the cutting wire is wound between the wire tightening device and the cutting device.

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