Wire saw unit and wire cutting machine

Abstract

The utility model relates to the technical field of wire cutting, in particular to a fret saw unit and a wire cutting machine, the fret saw unit is arranged on a base body, the fret saw unit comprises a take-up and pay-off mechanism, a tension mechanism and a cutting mechanism, the tension mechanism is located between the take-up and pay-off mechanism and the cutting mechanism when observed in the running direction of a cutting wire, and the cutting mechanism is located between the take-up and pay-off mechanism and the cutting mechanism. Wherein the tension mechanism comprises a tension support; the tension wheel is pivotally arranged on the tension support; and the fixing part comprises a fixing seat, the fixing seat is arranged on the base body, and the tension support is arranged on the fixing seat in a manner of being capable of moving along a straight line. By means of the structure, the operation reliability and the cutting quality of the wire cutting machine are expected to be guaranteed on the premise that the number of the guide wheels is reduced. And the extra tension of the cutting line in the running process can be reduced. In addition, due to the arrangement of the fixing part, the tension mechanism can be developed towards the direction of modularization.

Description

Technical Field

[0001] The utility model relates to the technical field of wire cutting, and specifically provides a wire saw unit and a wire cutting machine. Background Art

[0002] Wire cutting machine is a kind of equipment which uses cutting wire (such as diamond wire, which is usually a cutting steel wire with tiny diamond particles embedded on the surface) to perform cutting operations such as truncation, squaring and slicing on hard and brittle materials to be processed (such as silicon rods (including single crystal silicon rods, polycrystalline silicon ingots, etc.), sapphire rods, magnetic rods, semiconductor rods, etc.).

[0003] Take the slicer that slices photovoltaic silicon rods (referred to as silicon rods) as an example. The slicer directly operates on the silicon rods through a cutting mechanism. For example, under normal circumstances, the wire cutting machine mainly includes three cutting main rollers (two on the top and one on the bottom) distributed in an inverted triangle shape. The cutting main rollers are processed with dense annular grooves. By densely winding the diamond wires at the positions corresponding to the annular grooves, a wire net that can continuously cut the silicon rods can be formed. Based on this, through the reciprocating motion of the diamond wire between the cutting mechanism and other structures of the wire cutting machine such as the retractable wire rollers, the diamond wire located between the two upper cutting main rollers can cut the workpiece.

[0004] Reference Figure 1 , Figure 1 A schematic diagram of the structure of a slicer according to an existing example is shown. Figure 1 As shown, in this example, the diamond wire of the existing slicer is between the winding rollers 01 of the left and right wire-reeling mechanisms. The cutting mechanism of the slicer usually includes two or three main rollers, and in this example, there are three main rollers, namely, the upper left main roller 021, the upper right main roller 022, and the lower main roller 023. In addition, the slicer includes at least six guide wheels (three on each side). Taking the left side as an example, the three guide wheels are the wire arrangement wheel 03, the tension wheel 04, and the reversing wheel 05. Based on this structure, the winding path of the slicer is: the winding roller on the left (taking the winding roller as the pay-off roller (the winding roller on the right is the take-up roller at this time) as an example, obviously, the function of the winding roller can be switched between the take-up roller and the pay-off roller. For example, assuming that the winding roller on the left is the take-up roller, the winding roller on the right is switched to the pay-off roller accordingly) → the left side (wire arranging wheel, tension wheel, reversing wheel) → main roller three → main roller two → main roller one → main roller three (multiple windings to form a wire mesh) → the right side (reversing wheel, tension wheel, wire arranging wheel) → the right winding roller.

[0005] On this basis, the inventor intends to propose a product form with a reduced number of guide wheels. This is because: the product form with a reduced number of guide wheels can not only reduce the user's investment costs in guide wheel consumables, etc., but also reduce the distance of the diamond wire from the main roller to the winding roller. On this basis, it is expected to reduce the negative impact caused by the additional tension caused by factors such as the inertia of the guide wheel, friction resistance, bending stress of the diamond wire bypassing the guide wheel, and torsional stress of the diamond wire caused by the non-ideal coplanarity between the guide wheels during operation, thereby improving the cutting quality of the slicer. Obviously, this is of great significance to the future application of ultra-fine wires and high-speed wire slicers. However, how to still ensure the operating reliability and cutting quality of the slicer is a technical problem that must be faced when proposing a product form with a reduced number of guide wheels.

[0006] In addition, the current tension wheel adjusts the tension fluctuation by swinging along the tension swing rod. However, the angle adjustment corresponding to the swing actually involves adjustments in two directions. Such an adjustment process often brings additional tension due to the friction resistance of the diamond wire during operation, the bending stress of the diamond wire when it passes around the guide wheel, and the torsional stress of the diamond wire caused by the non-ideal coplanarity between the guide wheels. This will possibly affect the cutting quality of the slicer.

[0007] Therefore, this field needs a new technical solution to solve the above technical problems. Utility Model Content

[0008] The utility model aims to at least partially solve the above-mentioned technical problems. Specifically, it solves the technical problem of how to improve the influence of tension fluctuation regulation on the cutting quality of the slicer while ensuring the operating reliability of the slicer as much as possible when proposing a product form with reduced number of guide wheels.

[0009] In a first aspect, the utility model provides a wire saw unit, which is arranged on a base body, and the wire saw unit includes a wire retracting and releasing mechanism, a tension mechanism and a cutting mechanism. When observed along the running direction of the cutting line, the tension mechanism is located between the wire retracting and releasing mechanism and the cutting mechanism, wherein the tension mechanism includes: a tension support; a tension wheel, which is pivotally arranged on the tension support; and a fixing part, which includes a fixing seat, and the fixing seat is arranged on the base body, and the tension support is arranged on the fixing seat in a manner that it can move along a straight line.

[0010] This structure can reduce the extra tension of the cutting line caused by friction resistance, bending stress of the cutting line bypassing the guide wheel, and torsional stress of the cutting line caused by the non-ideal coplanarity between the guide wheels. In addition, the setting of the fixing part can promote the development of the tension mechanism in the direction of modularization.

[0011] It is understandable that those skilled in the art can determine the structural form of the fixing seat and the specific way of setting it on the base body according to actual needs, such as fixed connection, integral molding, etc.

[0012] In addition, it is understandable that those skilled in the art can determine the direction of movement, the range of movement, the structure / mechanism on which the movement depends, etc. according to actual needs.

[0013] For the above-mentioned wire saw unit, in a possible embodiment, the wire retracting and paying-out mechanism includes a first wire retracting and paying-out mechanism and a second wire retracting and paying-out mechanism, and the tension mechanism includes a first tension mechanism and a second tension mechanism, and the first tension mechanism and the second tension mechanism are arranged between the first wire retracting and paying-out mechanism and the second wire retracting and paying-out mechanism, and are arranged along the running direction of the cutting line.

[0014] Through such a configuration, an arrangement mode of the tension mechanism in the two guide wheel wire saw units is provided.

[0015] For the above-mentioned wire saw unit, in a possible embodiment, the tension support is arranged on the fixed seat in a manner that it can move in a straight line parallel to a first direction, wherein the first direction is a running direction of the cutting line between the tension wheels of the first tension mechanism and the second tension mechanism.

[0016] Through such a configuration, an arrangement mode of the tension mechanism in the two guide wheel wire saw units is provided.

[0017] It can be understood that the parallel here should be understood as approximately parallel.

[0018] For the above-mentioned wire saw unit, in a possible implementation manner, the fixing portion includes a driving transmission mechanism, and the driving transmission mechanism drives the tension support to move along a straight line.

[0019] Such a configuration provides a possible way for the tension bearing to achieve its linear movement.

[0020] It is understandable that those skilled in the art can determine the specific form of the drive transmission mechanism according to actual needs, such as setting the drive part and the transmission part separately or integrating them.

[0021] For the above-mentioned wire saw unit, in a possible implementation, the drive transmission mechanism includes a driving component and a screw-nut mechanism, the driving component can drive the screw of the screw-nut mechanism to rotate, and the nut of the screw-nut mechanism is fixedly connected to the tension support or integrally formed.

[0022] Through such a structure, a possible implementation method for the drive transmission of the tension support is provided, for example, the driving component can be a driving motor, a rotating module, or other component that can realize rotation output.

[0023] For the above-mentioned wire saw unit, in a possible implementation manner, the driving component is a servo motor; and / or the power output end of the driving component is connected to the screw of the screw-nut mechanism through a coupling; and / or a linear guide mechanism adapted to the tension support is provided on the fixed seat.

[0024] Through such a configuration, a possible structural form of the fixed part is given, and as a type of driving motor, such as a servo motor, it has the advantage of being able to accurately control parameters such as position, speed, acceleration, etc. For example, the linear guide mechanism is a linear guide rail, a slide groove (cooperating with a slider on the tension support), etc.

[0025] For the above-mentioned wire saw unit, in a possible implementation manner, the tension mechanism includes a tension rotating assembly, and the tension wheel is rotatably connected to the tension support via the tension rotating assembly.

[0026] Through such a configuration, a possible structural form is provided for the tension wheel to realize its rotation.

[0027] It is understandable that those skilled in the art can determine the specific structural form of the tension rotating assembly according to actual needs. For example, a shaft is provided on the tension support, and the tension wheel is provided at one end of the shaft away from the tension support through a bearing.

[0028] For the above-mentioned wire saw unit, in a possible implementation manner, at least a portion of the tensioning mechanism can be deflected relative to a deflection axis of the base body.

[0029] With such a configuration, it is possible to achieve that the tension wheel has a deviation correction function while being able to adjust tension fluctuations.

[0030] It is understandable that technical personnel in this field can determine the relationship between the deflection axis and the movement range / direction of the tension support according to actual needs. For example, the deflection axis may or may not be within the plane of movement, and the deflection axis and the movement direction may be parallel or have an angle (such as vertical, etc.).

[0031] It is understandable that those skilled in the art can determine the specific structural form for achieving deflection according to actual needs. For example, any mechanism that can achieve deflection by means of the external force of the cutting wire on the wheel groove of the tension wheel can be used, such as the mechanism that can include but is not limited to a universal coupling, a gear set, etc.

[0032] For the above-mentioned wire saw unit, in a possible implementation manner, the deflection axis is parallel to the moving direction of the tension support.

[0033] This configuration provides a specific relationship between the deflection axis and the displacement direction of the tension support.

[0034] For the above wire saw unit, in a possible implementation manner, the tension mechanism includes a counterweight assembly.

[0035] With such a configuration, it is possible to ensure that during the deflection process, the center of gravity of the deflected component assembly is always located on the deflection axis, thereby ensuring the stability of the wire saw unit during the deflection process.

[0036] It is understandable that those skilled in the art can determine the structural form, number, location and setting method of the counterweight assembly according to actual needs, such as a fixed structure or a movable structure. For example, the configuration assembly can be set on a connecting component, or it can be set on other components that deflect together with the connecting component. For example, the counterweight assembly includes a counterweight rod and a counterweight block arranged on the counterweight rod, and the counterweight block can move in a spiral along the counterweight rod. In addition, the counterweight block includes one or more, and the structural form, installation direction, movement direction, etc. of the multiple counterweight blocks can be the same or different.

[0037] In a second aspect, the utility model provides a wire cutting machine, which comprises the wire saw unit described in any one of the above items.

[0038] It can be understood that the wire cutting machine has all the technical effects of the wire saw unit described in any of the above items, which will not be repeated here.

[0039] For the above-mentioned wire cutting machine, in a possible implementation manner, the wire cutting machine is a slicer.

[0040] Through such a structure, a specific structural form of the wire cutting machine is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The following takes the workpiece to be processed as a silicon rod to be cut (hereinafter referred to as silicon rod) and the wire cutting machine as a slicer as an example, and describes the preferred embodiment of the utility model with reference to the accompanying drawings, in which:

[0042] Figure 1 A schematic structural diagram of a slicer according to an existing example is shown;

[0043] Figure 2 A schematic diagram showing the structure of a tension mechanism of a slicer of a conventional example;

[0044] Figure 3 A schematic diagram showing the working principle of a tension mechanism of a slicer according to an existing example;

[0045] Figure 4 A schematic diagram showing the structure of a slicer according to an embodiment of the utility model; and

[0046] Figure 5 A structural schematic diagram of a tension mechanism of a slicer according to an embodiment of the utility model is shown.

[0047] List of reference numerals:

[0048] 01, winding roller; 021, main roller one; 022, main roller two; 023, main roller three; 03, wire arrangement wheel; 04, tension wheel; 041, tension motor; 042, tension swing rod; 05, reversing wheel;

[0049] 100. Slicer;

[0050] 1. Framework;

[0051] 2. Cutting room; 3. Winding room;

[0052] 4. Cutting mechanism;

[0053] 41. first cutting main roller; 42. second cutting main roller; 43. third cutting main roller;

[0054] 5. Retracting and releasing wire mechanism;

[0055] 51. Pay-off and take-up rollers;

[0056] 6. Tension mechanism;

[0057] 61. Fixed seat; 62. Servo motor; 63. Coupling; 64. Screw nut mechanism; 65. Tension support; 66. Tension wheel; 67. Linear guide; 68. Tension rotating assembly; 69. Counterweight assembly;

[0058] 7. Tension adjustment axis;

[0059] 8. Deflection axis;

[0060] 9. Diamond wire. DETAILED DESCRIPTION

[0061] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the present embodiment is described in a manner in which the deflection axis is roughly parallel to the tension adjustment axis corresponding to the moving direction of the tension wheel, it is obvious that those skilled in the art can flexibly adjust according to actual needs, such as an angle between the two, the two axes with the angle are not coplanar, etc.

[0062] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0063] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", 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 direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In addition, in order to better illustrate the present invention, many specific details are given in the following specific embodiments, and those skilled in the art should understand that the present invention can also be implemented without certain specific details. In some examples, the principle of the slicer well known to those skilled in the art is not described in detail in order to highlight the main purpose of the present invention.

[0065] Three types of wire cutting machines are cutters, squarers and slicers. Taking the workpiece to be processed as a silicon rod as an example, the cutter is mainly used to cut a longer silicon rod into a shorter silicon rod (such as a silicon rod with a circular cross section, referred to as a round rod). Specifically, a silicon rod is cut into multiple sections by cutting along the radial direction of the silicon rod. The squarer is mainly used to cut a round rod into a silicon rod with a rectangular cross section (such as a square) (referred to as a square rod, if the square rod at this stage has not been ground, it can usually be called a rough rod). Specifically, the edge of the round rod is removed by cutting along the axial direction of the silicon rod to cut the round rod into a square rod. The slicer is mainly used to cut the square rod (such as the square rod at this stage that has been ground, usually referred to as a finished rod) that meets the precision standard by multi-wire cutting along its radial direction to obtain a thin slice to be used. The utility model mainly takes a slicer with a wire mesh as an example to illustrate the wire cutting machine.

[0066] On the basis of the slicer with a six-guide wheel structure mentioned in the background technology, the inventor intends to propose a product form with a reduced number of guide wheels. This is because: the product form with a reduced number of guide wheels can not only reduce the user's investment in guide wheel consumables, but also reduce the distance of the diamond wire from the main roller to the winding roller. On this basis, it is expected to reduce the negative impact caused by the additional tension caused by factors such as the inertia of the guide wheel, friction resistance, bending stress of the diamond wire bypassing the guide wheel, and torsional stress of the diamond wire caused by the non-ideal coplanarity between the guide wheels during operation, thereby improving the cutting quality of the slicer. Obviously, this is of great significance to the future application of ultra-fine wires and high-speed wires in slicers. However, how to still ensure the operating reliability and cutting quality of the slicer is a technical problem that must be faced when proposing a product form with a reduced number of guide wheels.

[0067] Main reference Figure 4 , Figure 4 The structural schematic diagram of a slicer according to an embodiment of the utility model is shown. Figure 4 As shown, in a possible embodiment, the slicer 100 includes a frame 1 (the frame or a structure fixedly connected to the frame can be regarded as a base), and the frame is formed with a cutting chamber 2 at the top and two winding chambers 3 at the left and right sides below. The wire saw unit of the slicer mainly includes a cutting mechanism 4 arranged in the cutting chamber and two wire-retracting and unwinding mechanisms 5 respectively arranged in the two winding chambers, and a tension mechanism 6 is arranged between the cutting mechanism 4 and each wire-retracting and unwinding mechanism 5. The wire-retracting and unwinding mechanism 5 includes a wire-retracting and unwinding roller 51, and the diamond wire 9 as a cutting wire can reciprocate between the wire-retracting and unwinding rollers of the two wire-retracting and unwinding mechanisms. In this example, the cutting mechanism 4 includes a first cutting main roller 41, a second cutting main roller 42 and a third cutting main roller 43 distributed in an inverted triangle, and the cutting main rollers (41, 42) are located above the third cutting main roller 43. Tension mechanisms 6 are respectively arranged between the third cutting main roller 43 and the two wire-retracting and unwinding mechanisms 5 on the left and right sides. In this way, through the reciprocating motion of the diamond wire between the two retractable and retractable rollers, the tension wheel mechanism on the corresponding side and the cutting mechanism, the silicon rod can be cut along its radial direction to obtain silicon wafers. Specifically, the diamond wire wound by the retractable and retractable roller in the "release" function is guided by the tension wheel of the tension mechanism on the corresponding side to the cutting mechanism composed of cutting main rollers (41, 42, 43), and then guided by another tension wheel to the retractable and retractable roller in the "retract" function, and the retractable and retractable rollers on both sides perform retracting and retracting alternately. Based on this, the wire net formed by the moving diamond wire 9 between the cutting main rollers (41, 42) located above can be used to cut the silicon rod waiting for processing that moves downward. If the frame is provided with a threading area between the cutting chamber and the winding chamber on the corresponding side, the diamond wire in the winding chamber can extend into the cutting area through the threading area.

[0068] Compared with the existing slicer with six guide wheels mentioned in the background technology, the structure of the slicer in the embodiment omits the wire arrangement wheel and the reversing wheel and improves the slicer into a two-guide wheel structure. Based on this structure, it is still assumed that the winding roller on the left is the winding roller (the winding roller on the right is the unwinding roller at this time), and the winding path of the slicer is: the winding roller on the left → the tension wheel on the left → the third main roller → the second main roller → the first main roller → the third main roller (multiple windings to form a wire mesh) → the tension wheel on the right → the winding roller on the right, and the completed winding path only passes through two guide wheels.

[0069] Reference Figure 2 and Figure 3 , Figure 2 A schematic diagram showing the structure of a tension mechanism of a slicer according to a conventional example. Figure 3 FIG. 2 is a schematic diagram showing the working principle of the tension mechanism of a slicer according to an existing example. Figure 2 and Figure 3As shown, the tension mechanism of the existing example mainly includes a tension wheel 04 and its drive transmission mechanism. The drive transmission mechanism mainly includes a tension motor 041 and a tension swing rod 042. The tension motor that outputs a constant torque can balance the initial tension value of the diamond wire. In this way, when the tension on the diamond wire changes, the left and right swing of the tension swing rod (around the tension swing axis) can buffer the tension change on the diamond wire, so that the tension on the diamond wire remains in a relatively stable state. Specifically, during the operation of the tension mechanism, the tension motor continuously outputs a constant torque. Taking the example of the diamond wire winding to the left, due to the existence of the constant torque M output by the tension motor, the tension wheel is thus subjected to a rightward force F (constant torque M / length of the tension swing rod). Assuming that the diamond wire wound on the tension wheel generates a leftward pulling force (denoted as F1 and F2 respectively, where F1 is the tension provided by the cutting main roller to the diamond wire, and F2 is the tension provided by the wire winding roller to the diamond wire). When the rotational speed of the cutting main roller matches the rotational speed of the wire winding roller (equilibrium state), F1 + F2 = F, so the tension swing rod will not swing (in the zero position). When the rotational speed of the cutting main roller does not match the rotational speed of the wire winding roller, the resultant force of F1 and F2 will be different from F. At this time, if F1 + F2 > F, the tension swing rod swings to the left, and if F1 + F2 < F, the tension swing rod swings to the right to buffer the tension change of the diamond wire. At this time, the encoder on the tension motor will capture and identify the left / right swing posture of the tension swing rod. Based on this, the rotational speed of the wire winding roller can be adjusted to balance the tension on the diamond wire, so that the tension swing rod returns to the zero position. It can be seen that the tension mechanism of the existing example adjusts the tension fluctuation by swinging. Based on the adjustment method of the existing example, the frictional resistance during the operation of the diamond wire, the bending stress of the diamond wire bypassing the guide wheel, and the torsional stress of the diamond wire caused by the imperfect coplanarity between the guide wheels often bring additional tension, which will affect the cutting quality of the slicing machine to a certain extent. Moreover, the generation of additional tension is also not conducive to the development of the slicing machine in the direction of ultra-fine wire and high wire speed of the diamond wire. In view of this, the present invention adjusts the tension mechanism from a swinging adjustment method to a mobile adjustment method.

[0070] Mainly referring to Figure 5 , Figure 5 shows a schematic structural diagram of a tension mechanism according to an embodiment of the present invention. As Figure 5 shown, in a possible implementation manner, the adjustment method of the tension mechanism 6 is adjusted from the swinging adjustment of the tension wheel realized by means of the tension swing rod to the mobile adjustment of linear movement along the tension adjustment axis 7.

[0071] Continue to refer to Figure 5In a possible implementation, the tension mechanism 6 mainly includes a fixed seat 61, a drive transmission mechanism arranged on the fixed seat 61, a tension support 65 and a tension wheel 66, wherein the drive transmission mechanism mainly includes a servo motor (drive component) 62 and a screw nut mechanism 64, the power output shaft of the servo motor is connected to the screw of the screw nut mechanism 64 through a coupling 63 to drive the screw to rotate, and the nut of the screw nut mechanism 64 is fixedly connected to the tension support 65. At the same time, a linear guide rail 67 adapted to the tension support 65 is arranged on the fixed seat, so that under the action of the drive transmission mechanism, the tension support can move along the linear guide rail, that is, move along the direction of the tension adjustment axis 7.

[0072] In a possible implementation, the tension wheel 66 is disposed on the tension support 65 through a tension rotation assembly 68. For example, the tension rotation assembly 68 may include but is not limited to: the tension rotation assembly includes a rotating shaft and a bearing, one rotating end of which is fixedly disposed on the tension support, and the tension wheel is rotationally connected to the other end of the rotating shaft through the bearing; the tension rotation assembly includes a rotatably connected shaft and a sleeve (such as a bearing disposed therebetween), wherein the shaft is fixedly disposed on the tension support, wherein the sleeve is fixedly connected to the tension wheel or is integrally formed, so that the tension wheel can realize its rotation relative to the tension support based on the rotation of the sleeve relative to the shaft.

[0073] In order to ensure that the center of gravity of the structure including the tension wheel (the tension support other than the tension wheel, etc.) during the deflection process can fall on the deflection axis to avoid the diamond wire from being out of the groove and wearing eccentrically, the tension mechanism includes a counterweight assembly 69, such as a counterweight assembly usually including one or more counterweight blocks. It is understandable that those skilled in the art can determine the structural form and number of the counterweight blocks, the way they constitute the counterweight assembly, the specific way the counterweight assembly constitutes the tension mechanism, etc. according to actual needs. Exemplarily, the counterweight block is arranged on the base through a counterweight bracket. In order to reduce the weight of the counterweight bracket and avoid the weight of the counterweight bracket itself from affecting the center of gravity of the structure including the tension wheel that performs deflection motion, the counterweight support can be subjected to weight reduction treatment such as processing a weight reduction groove, partial thinning, etc.

[0074] Referring to the functions of the slicer with a six-guide wheel structure in the existing example, in addition to adjusting the tension fluctuation on the diamond wire to buffer the tension change on the diamond wire, there is also a problem that needs to be solved: when the diamond wire is deflected in the wire groove of the tension wheel, it is necessary to offset the deflection to a certain extent at least by the deflection movement of the diamond wire and related structures along the deflection axis 8, and thereby reduce or avoid the risk of wire breakage caused by friction between the diamond wire and the wire groove of the tension wheel.

[0075] Specifically, in an ideal state, when the diamond wire entering (or leaving) the wire groove of the tension wheel 66 is not deflected, the diamond wire entering the wire groove of the tension wheel 66 from the retracting and unreeling roller 51 should be roughly in the plane where the center line of the wire groove is located. When the diamond wire entering (or leaving) the wire groove of the tension wheel 66 is deflected (the diamond wire deviates from the plane where the center of the wire groove of the tension wheel is located), the tension wheel 66 will be subjected to force due to the deflection of the diamond wire and thus cause the tension wheel 66 and related structures such as the tension support 65 and the linear module to produce a certain amount of deflection around the deflection axis, thereby reducing the degree of wear between the diamond wire and the wire groove of the tension wheel, and thus seeking to reduce the probability of the diamond wire breaking. In addition, based on the deflection movement, it is also possible to effectively avoid phenomena such as the diamond wire slipping out of the wire groove. At the same time, in the case where the deflection phenomenon has already occurred, the degree of deflection can be determined by detection components such as distance sensors. Based on this, the tension wheel is corrected to a position consistent with the ideal state through corresponding correction measures (such as moving the take-up and pay-off rollers along their axial direction, etc.).

[0076] In this example, the deflection axis 8 is located below the aforementioned tension adjustment axis 7 (such as an axis at a position corresponding to the approximate middle of the linear module and having a direction roughly consistent with the moving direction of the tension support 65) and the two are roughly parallel. Obviously, those skilled in the art can use any reasonable method to achieve the deflection movement of the tension wheel 66 and its related structures according to actual needs. In addition, the specific directions of the tension adjustment axis 7 and the deflection axis 8 and the relative positional relationship between the two can also be flexibly adjusted according to actual needs. As a simple example, the deflection of the tension wheel can be achieved by a component including a universal coupling (the universal coupling includes a rotatable first shaft and a second shaft, the first shaft is connected to a structure related to the tension wheel, and the second shaft is connected to a base or a structure fixed relative to the base).

[0077] It can be seen that in the preferred embodiment of the present invention, by changing the way the tension wheel adjusts its tension fluctuation from swinging adjustment to linear reciprocating motion adjustment, it can ensure that the diamond wire between the tension wheel and the cutting mechanism always remains in a horizontal state during the adjustment of the tension fluctuation, thereby reducing the possibility of tension fluctuation of the diamond wire, thereby reducing the additional tension of the diamond wire caused by the friction resistance of the diamond wire during operation, the bending stress of the diamond wire bypassing the guide wheel, and the torsional stress of the diamond wire caused by the non-ideal coplanarity between the guide wheels, thereby reducing the negative impact of the additional tension on the slicer, and ultimately expected to improve the cutting quality of the slicer, which is of great significance to the development and research of the application trend of "ultra-fine wire and high wire speed" of diamond wire in the slicing field in the future.

[0078] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A wire saw unit, characterized in that: The wire saw unit is arranged on the base body, and comprises a wire retracting and releasing mechanism, a tension mechanism and a cutting mechanism. Observing along the running direction of the cutting line, the tension mechanism is located between the wire-reeling and wire-releasing mechanism and the cutting mechanism. Wherein, the tension mechanism comprises: Tension support; a tension wheel pivotally disposed on the tension support; and The fixing part comprises a fixing seat, wherein the fixing seat is arranged on the base body, and the tension support is arranged on the fixing seat in a manner of being movable along a straight line.

2. The wire saw unit according to claim 1, characterized in that The wire-retracting and -releasing mechanism comprises a first wire-retracting and -releasing mechanism and a second wire-retracting and -releasing mechanism. The tension mechanism includes a first tension mechanism and a second tension mechanism, wherein the first tension mechanism and the second tension mechanism are arranged between the first wire-retracting and -releasing mechanism and the second wire-retracting and -releasing mechanism, and are arranged along the running direction of the cutting line.

3. The wire saw unit according to claim 2, characterized in that The tension support is arranged on the fixing seat in a manner that it can move along a straight line parallel to the first direction. Wherein, the first direction is the running direction of the cutting line between the tension wheels of the first tension mechanism and the second tension mechanism.

4. The wire saw unit according to claim 2 or 3, characterized in that The fixing portion comprises a driving transmission mechanism, and the driving transmission mechanism drives the tension support to move along a straight line.

5. The wire saw unit according to claim 4, characterized in that The drive transmission mechanism comprises a drive component and a screw-nut mechanism, wherein the drive component can drive the screw of the screw-nut mechanism to rotate, and the nut of the screw-nut mechanism is fixedly connected to the tension support or is integrally formed.

6. The wire saw unit according to claim 5, characterized in that The driving component is a servo motor; and / or The power output end of the driving component is connected to the screw of the screw-nut mechanism through a coupling; and / or The fixing seat is provided with a linear guide mechanism adapted to the tension support.

7. The wire saw unit according to claim 1, characterized in that The tension mechanism comprises a tension rotating assembly, and the tension wheel is pivotally arranged on the tension support through the tension rotating assembly.

8. The wire saw unit according to claim 1, characterized in that At least a portion of the tensioning mechanism is deflectable relative to a deflection axis of the base body.

9. The wire saw unit according to claim 8, characterized in that The deflection axis is parallel to the moving direction of the tension support.

10. The wire saw unit according to claim 8, characterized in that The tension mechanism includes a counterweight assembly.

11. A wire cutting machine, characterized in that: The wire cutting machine comprises the wire saw unit according to any one of claims 1 to 10.

12. The wire cutting machine according to claim 11, characterized in that: The wire cutting machine is a slicer.

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