Automatic feeding device of wire cutting machine

Abstract

The utility model provides an automatic feeding device of a wire cutting machine, which is suitable for automatically feeding a cutting wire for cutting operation and comprises a driving module, a feeding module and a force sensor. The driving module comprises a driving wheel and a driven wheel which are opposite to each other in space, the cutting wire is wound on the driving wheel and the driven wheel, the cutting wire is driven by the driving wheel to rotate between the driving wheel and the driven wheel, and the cutting wire rotates from the driving wheel to the driven wheel. The force sensor is arranged at the axis of the driven wheel, the feeding module is connected with the driving module and is configured to drive the driving module and the cutting wire to abut against the to-be-cut material in the cutting direction, and the force sensor senses the tension of the cutting wire. Wherein the rotating direction is perpendicular to the cutting direction.

Description

Technical Field

[0001] This case relates to an automatic feeding device for a wire cutting machine, specifically an automatic feeding device for a wire cutting machine with a force sensor to sense changes in the tension of the cutting wire, thereby controlling the feeding or realizing automatic parameter adjustment. Background Art

[0002] A wire EDM (Wire Cutting Machine) utilizes a flexible wire for cutting. The wire is tensioned, and the tension varies depending on processing conditions (such as wire material and wire diameter). As the wire strikes the material being cut, it gradually forms a bow. Excessive feed speeds can easily result in uneven cut surfaces. Furthermore, traditional wire tension cannot be easily measured, nor can it automatically adjust the tension, making it impossible to maintain optimal wire tension for cutting.

[0003] Most designs currently on the market use motor current to determine wire tension for sawing. This method cannot accurately measure changes in wire tension, nor can it effectively control the feed rate of the current used for downward cutting. Unknown changes in wire tension can easily lead to blunting of the wire, resulting in a skewed cutting surface when cutting at the same feed rate. This is not only prone to breakage, but also affects operational efficiency. Furthermore, with traditional cutting wires, the lifespan of the wire cannot be determined during use. Often, the wire is not replaced until it breaks, requiring the machine to be stopped for wire replacement, severely impacting cutting efficiency.

[0004] In view of this, it is necessary to provide an automatic feeding device for a wire cutting machine with a force sensor, which uses the force sensor installed on the driven wheel to control the feeding conditions of the cutting wire, so that the feeding speed can be adjusted by the reaction force of the cutting to solve the problems of the known technology. Utility Model Content

[0005] The purpose of this application is to provide an automatic feed device for a wire cutting machine with a force sensor. The force sensor installed on the driven wheel is used as a condition control for the feeding of the cutting wire, so that the feed speed can be adjusted according to the reaction force of the cutting.

[0006] Another purpose of the present invention is to provide an automatic feeding device for a wire cutting machine, which senses the tension of the cutting wire through a force sensor, that is, the feeding rate can be adjusted according to a constant tension (the rate from top to bottom can be adjusted), thereby improving the cutting efficiency and also improving the cutting life of the cutting wire. Furthermore, since a force sensor is installed on the feeding device (on the driven wheel) to sense the tension of the cutting wire, the current sharpness of the cutting wire can be known, and the wire breakage problem will not occur due to excessive feeding after it becomes blunt. On the other hand, the tightness of the cutting wire can be adjusted according to the condition of constant force, so as to saw all materials of different hardness. There is no need for professional technicians to adjust the sawing parameters. The parameter adjustment is more convenient and automated, achieving the effect of automatic parameter adjustment.

[0007] Another object of this invention is to provide an automatic feed device for a wire cutting machine. When the sensor is mounted directly on the axis of the driven wheel, it can directly and accurately measure the tension of the cutting wire and the tension during sawing, thereby controlling the downward feed rate based on the accurate tension. Alternatively, the sensor can be connected to the base of the material to be cut. When the cutting wire cuts the material downward, the force sensor directly below the material can sense the change in the cutting wire tension through the reaction force, thereby controlling the feed or implementing automated parameter adjustment.

[0008] In order to achieve the aforementioned purpose, the present invention provides an automatic feeding device for a wire cutting machine, which is suitable for automatically feeding a cutting wire for cutting operations. The automatic feeding device for a wire cutting machine includes a driving module, a feeding module, and a force sensor. The driving module includes a driving wheel and a driven wheel, and the driving wheel and the driven wheel are opposite to each other in space, wherein the cutting wire is wound around the driving wheel and the driven wheel, and the cutting wire is driven by the driving wheel to rotate between the driving wheel and the driven wheel, wherein the cutting wire forms a rotation direction from the driving wheel to the driven wheel. The feeding module is connected to the driving module and is configured to drive the driving module and the cutting wire to contact the material to be cut along the cutting direction, wherein the rotation direction and the cutting direction are perpendicular to each other. The force sensor is arranged on the axis of the driven wheel and is configured to sense the tension of the cutting wire.

[0009] In one embodiment, the wire-cut automatic feeding device further includes a control module electrically connected to the force sensor, the driving module, and the feeding module.

[0010] In one embodiment, the control module receives the tension of the cutting wire sensed by the force sensor, and controls the driving wheel of the driving module to drive the rotation rate of the cutting wire according to the tension of the cutting wire, or controls the feeding module to drive the driving module and the cutting wire to feed the material to be cut along the cutting direction according to the tension of the cutting wire.

[0011] In one embodiment, when the tension of the cutting wire is within a tension threshold range, the control module controls the driving module to maintain the feed rate and the rotation speed. When the tension of the cutting wire exceeds the tension threshold range, the feed rate is reduced or the rotation rate is increased. When the tension of the cutting wire does not reach the tension threshold range, the feed rate is increased or the rotation rate is reduced.

[0012] In one embodiment, the force sensor includes a force-bearing portion and a fixed portion, which are arranged axially, wherein the driven wheel is concentrically mounted on the force-bearing portion through a bearing. The force sensor allows sensing the force of the cutting wire acting on the driven wheel through the force-bearing portion, thereby sensing the tension of the cutting wire.

[0013] In one embodiment, the driving wheel and the driven wheel have the same radius, are arranged parallel to each other and are located at the same horizontal height, wherein the cutting wire is wound around the outer periphery of the driving wheel and the driven wheel.

[0014] In order to achieve the aforementioned purpose, the present invention further provides an automatic feeding device for a wire cutting machine, which is suitable for automatically feeding a cutting wire for cutting operations. The automatic feeding device for a wire cutting machine includes a driving module, a feeding module, and a force sensor. The driving module includes a driving wheel and a driven wheel, and the driving wheel and the driven wheel are opposite to each other in space, wherein the cutting wire is wound around the driving wheel and the driven wheel, and the cutting wire is driven by the driving wheel to rotate between the driving wheel and the driven wheel, wherein the cutting wire forms a rotation direction from the driving wheel to the driven wheel. The force sensor is arranged at the bottom of the material to be cut. The feeding module is connected to the driving module and is configured to drive the driving module and the cutting wire to abut against the top of the material to be cut along the cutting direction. The rotation direction and the cutting direction are perpendicular to each other, and when the cutting wire abuts against the top of the material to be cut, the force sensor senses the tension of the cutting wire.

[0015] In one embodiment, the force sensor is a radial force sensor having a radial force sensing direction perpendicular to the cutting direction.

[0016] In one embodiment, the automatic feeding device of the wire cutting machine further includes a control module, which is electrically connected to the force sensor, the driving module, and the feeding module.

[0017] In one embodiment, the control module receives the tension of the cutting wire sensed by the force sensor, and controls the driving wheel of the driving module to drive the rotation rate of the cutting wire according to the tension of the cutting wire, or controls the feeding module to drive the driving module and the cutting wire to feed the material to be cut along the cutting direction according to the tension of the cutting wire.

[0018] In one embodiment, when the tension of the cutting wire is within a tension threshold range, the control module controls the driving module to maintain the feed rate and the rotation speed. When the tension of the cutting wire exceeds the tension threshold range, the feed rate is reduced or the rotation rate is increased. When the tension of the cutting wire does not reach the tension threshold range, the feed rate is increased or the rotation rate is reduced.

[0019] In one embodiment, the force sensor is an axial force sensor having an axial force sensing direction parallel to the cutting direction.

[0020] In one embodiment, the driving wheel and the driven wheel have the same radius, are arranged parallel to each other and are located at the same horizontal height, wherein the cutting wire is wound around the outer periphery of the driving wheel and the driven wheel.

[0021] In order to achieve the aforementioned purpose, the present invention further provides a control method for an automatic feeding device of a wire cutting machine, wherein the automatic feeding device of the wire cutting machine includes a driving module, a feeding module and a force sensor. The driving module drives the cutting wire to move in the rotation direction, and the feeding module is configured so that the driving module drives the driving module and the cutting wire to move in the cutting direction relative to the material to be cut, wherein the rotation direction and the cutting direction are perpendicular to each other. The control method includes the following steps: (a) starting the cutting operation of the material to be cut, the feeding module drives the driving module and the cutting wire to approach the material to be cut, and the force sensor enters the measurement mode to sense the real-time tension of the cutting wire; (b) judging the difference between the real-time tension measured by the force sensor and the tension critical value; (c1) when the real-time tension measured by the force sensor exceeds the tension critical value, judging to adjust the feed rate of the feeding module to drive the driving module and the cutting wire in the cutting direction relative to the material to be cut or to change the rotation rate of the driving wheel of the driving module to drive the cutting wire; when it is necessary to adjust the feed rate of the feeding module to drive the driving module and the cutting wire in the cutting direction relative to the material to be cut, reducing the feed rate degree; when it is necessary to change the rotation rate of the driving wheel of the driving module to drive the cutting wire, increase the rotation rate of the driving wheel; (c2) when the real-time tension measured by the force sensor does not reach the tension critical value, determine to adjust the feed rate of the driving module to drive the driving module and the cutting wire along the cutting direction relative to the material to be cut or change the rotation rate of the driving wheel of the driving module to drive the cutting wire; when it is necessary to adjust the feed rate of the driving module to drive the driving module and the cutting wire along the cutting direction relative to the material to be cut, increase the feed speed; when it is necessary to change the rotation rate of the driving wheel of the driving module to drive the cutting wire, reduce the rotation rate of the driving wheel; and (d) repeat step (b) until the cutting operation of the material to be cut is completed.

[0022] The driving module includes a driving wheel and a driven wheel, which are opposite to each other in space, wherein the cutting wire is wound around the driving wheel and the driven wheel, and the cutting wire is driven by the driving wheel to rotate between the driving wheel and the driven wheel, wherein the cutting wire forms a rotation direction from the driving wheel to the driven wheel.

[0023] The force sensor is arranged at the axis of the driven wheel, wherein the feed module is connected to the drive module and is configured to drive the drive module and the cutting wire to contact the material to be cut along the cutting direction, and the force sensor senses the tension of the cutting wire.

[0024] In one embodiment, the force sensor includes a force-bearing portion and a fixed portion, which are arranged axially, wherein the driven wheel is concentrically mounted on the force-bearing portion through a bearing, so that the force-bearing portion of the force sensor can sense the force exerted by the cutting wire on the driven wheel, and thus sense the tension of the cutting wire.

[0025] In one embodiment, the force sensor is a radial force sensor having a radial force sensing direction perpendicular to the cutting direction.

[0026] The force sensor is arranged at the bottom of the material to be cut, wherein the feed module is connected to the drive module, and is configured so that the drive module drives the drive module and the cutting wire to contact the top of the material to be cut along the cutting direction.

[0027] In one embodiment, the force sensor is an axial force sensor having an axial force sensing direction parallel to the cutting direction.

[0028] In one embodiment, steps (b) to (d) are implemented by a control module, which is electrically connected to the force sensor, the drive module, and the feed module to implement closed-loop control. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram showing the appearance and structure of the automatic feeding device of the wire cutting machine of the first embodiment of this case.

[0030] Figure 2 1 is a block diagram showing an automatic feeding device for a wire cutting machine according to a first embodiment of the present invention.

[0031] Figure 3 It is a schematic diagram showing the structure of the automatic feeding device of the wire cutting machine of the first embodiment of the present invention before performing the cutting operation.

[0032] Figure 4 It is a schematic structural diagram showing the automatic feeding device of the wire cutting machine of the first embodiment of the present invention when performing a cutting operation.

[0033] Figure 5 Schematic diagram showing the appearance and structure of the force sensor in the first embodiment of the present invention.

[0034] Figure 6 Schematic diagram showing the force measurement direction of the force sensor in the first embodiment of the present invention.

[0035] Figure 7 Schematic diagram showing the installation position of the force sensor in the second embodiment of this case.

[0036] Figure 8 It is a schematic diagram showing the structure of the automatic feeding device of the wire cutting machine of the second embodiment of the present invention before performing the cutting operation.

[0037] Figure 9 It is a schematic structural diagram showing the automatic feeding device of the wire cutting machine of the second embodiment of the present invention when performing a cutting operation.

[0038] Figure 10 This is a flow chart showing the control method of the automatic feeding device of the wire cutting machine in this case.

[0039] Description of Reference Numerals

[0040] 1. 1a: Automatic feeding device of wire cutting machine,

[0041] 10: Cutting wire,

[0042] 20: driver module,

[0043] 21: driving wheel,

[0044] 22: driven wheel,

[0045] 23: bearings,

[0046] 30, 30a: feed module,

[0047] 40, 40a: force sensor,

[0048] 41: force-bearing part,

[0049] 42: fixed part,

[0050] 43: Cables,

[0051] 50: control module,

[0052] 9: Material to be cut,

[0053] 91: Top,

[0054] 92: bottom,

[0055] D1: direction of rotation,

[0056] D2: cutting direction,

[0057] F: Directional force,

[0058] J: axis,

[0059] X, Y, Z: axes. DETAILED DESCRIPTION

[0060] Some typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various variations in different aspects without departing from the scope of the present invention, and that the descriptions and figures herein are intended to be illustrative, not limiting, of the present invention. For example, if the following description of the present invention describes a first feature disposed on or above a second feature, this includes embodiments in which the first feature and the second feature are in direct contact, as well as embodiments in which an additional feature may be disposed between the first and second features, such that the first and second features are not in direct contact. Furthermore, different embodiments of the present invention may use repeated reference symbols and / or indicia. This repetition is for the purpose of simplicity and clarity and is not intended to limit the relationship between the various embodiments and / or the described exterior structures. Furthermore, to facilitate description of the relationship between one component or feature and another component or features in the drawings, spatially related terms such as "above," "below," and similar terms may be used. Spatially relative terms are intended to encompass different orientations of a device in use or operation in addition to the orientations depicted in the drawings. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and the description of the spatially relative terms used interpreted accordingly. Furthermore, when a component is referred to as being "connected to" or "coupled to" another component, it can be directly connected to or coupled to the other component, or intervening components may be present. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0061] Figure 1 It is a schematic diagram showing the appearance and structure of the automatic feeding device of the wire cutting machine of the first embodiment of this case. Figure 2 1 is a block diagram showing an automatic feeding device for a wire cutting machine according to a first embodiment of the present invention. Figure 3 It is a schematic diagram showing the structure of the automatic feeding device of the wire cutting machine of the first embodiment of the present invention before performing the cutting operation. Figure 4 It is a schematic structural diagram showing the automatic feeding device of the wire cutting machine of the first embodiment of the present invention when performing a cutting operation. Figure 5 Schematic diagram showing the appearance and structure of the force sensor in the first embodiment of the present invention. Figure 6 This is a schematic diagram showing the force measurement direction of the force sensor in the first embodiment of this case. Figures 1 to 4As shown, in this embodiment, the present invention provides an automatic feeding device 1 for a wire cutting machine, which is suitable for automatically feeding a cutting wire 10 for cutting operations. The automatic feeding device 1 for a wire cutting machine includes a cutting wire 10, a driving module 20, a feeding module 30, and a force sensor 40. The driving module 20 includes a driving wheel 21 and a driven wheel 22, which are opposite to each other in space, for example, both are axially parallel to the Y axis and are arranged side by side at the same horizontal height on the X axis. The dimensions of the driving wheel 21 and the driven wheel 22 have the same radius, for example, but are not limited to this. In this embodiment, the cutting wire 10 is wound around the outer periphery of the driving wheel 21 and the driven wheel 22, and the cutting wire 10 is driven by the driving wheel 21 to rotate between the driving wheel 21 and the driven wheel 22. The cutting wire 10 also forms a rotation direction D1 between the driving wheel 21 and the driven wheel 22. In this embodiment, the force sensor 40 is positioned at the axis J of the driven wheel 22. The feed module 30 is connected to the drive module 20 and is configured to drive the drive module 20 and the cutting wire 10 along a cutting direction D2, for example, downwardly against the top 91 of the material 9 to initiate the cutting operation. At the start of the cutting operation, the force sensor 40 senses the horizontal force acting on the cutting wire 10 and, therefore, the change in tension in the cutting wire 10. In this embodiment, the rotation direction D1 (e.g., parallel to the X-axis) and the cutting direction D2 (e.g., parallel to the Z-axis) are perpendicular to each other.

[0062] It should be noted that in another embodiment, the movement of the drive module 20 and the cutting wire 10 relative to the material 9 to be cut can be achieved by another feed module 30a. The feed module 30a, for example, is connected to the bottom of the material to be cut, and drives the material 9 to be cut upward toward the drive module 20 and the cutting wire 10, so that the drive module 20 and the cutting wire 10 contact the top 91 of the material to be cut 9, and the cutting operation begins. This embodiment is not limited to this.

[0063] In one embodiment, the automatic wire cutting feed device 1 further includes a control module 50 electrically connected to the force sensor 40, the drive module 20, and the feed module 30. The control module 50 is configured to receive the tension of the cutting wire 10 sensed by the force sensor 40 and, based on the tension of the cutting wire 10, control the feed module 30 to drive the drive module 20 and the cutting wire 10 along the cutting direction D2 relative to the material 9 to be cut, or to control the rotation rate of the driving wheel 21 of the drive module 20 to drive the cutting wire 10. Because the force sensor 40 is directly mounted on the axis J of the driven wheel 22, it can directly measure the tension of the cutting wire 10 and can directly and accurately measure the tension during sawing. The accurate tension can then be used to control the downward feed rate of the feed module 30, the rotation speed of the driving wheel 21, or the upward feed rate of the feed module 30a, thereby achieving the application of automated parameter adjustment.

[0064] like Figures 4 to 6 As shown, in this embodiment, the force sensor 40 includes a force-bearing portion 41 and a fixing portion 42, which are arranged along the axial direction (i.e., the axis J direction). The required sensing signal and power supply are conventionally connected to the control module 50 (such as Figure 2 In this embodiment, the driven wheel 22 is connected to the bearing 23 (as shown in FIG. Figure 1 As shown, the force sensor 40 is concentrically mounted on the force-bearing portion 41. The force-bearing portion 41 of the force sensor 40 can measure the directional force F in the horizontal direction (i.e., the X-axis direction). In other words, in this embodiment, the force sensor 40 can be a radial force sensor, with a radial force sensing direction perpendicular to the cutting direction D2. Thus, the force-bearing portion 41 of the force sensor 40 can sense the force acting on the driven wheel 22 by the cutting wire 10, such as the directional force F in the horizontal direction, and thus sense the tension of the cutting wire 10. Of course, the type and size specifications of the force sensor 40 relative to the driven wheel 22 can be adjusted according to actual application requirements, and the present invention is not limited to this.

[0065] Figure 7 Schematic diagram showing the installation position of the force sensor in the second embodiment of this case. Figure 8 It is a schematic diagram showing the structure of the automatic feeding device of the wire cutting machine of the second embodiment of the present invention before performing the cutting operation. Figure 9 This is a schematic diagram showing the structure of the automatic feeding device of the wire cutting machine of the second embodiment of the present invention when performing cutting operation. In this embodiment, please refer to Figures 7 to 9 , automatic feeding device 1a of wire cutting machine and Figures 1 to 3 The wire cutting machine automatic feeding device 1 shown is similar, and the same component numbers represent the same components, structures and functions. Unlike the aforementioned embodiment in which the force sensor 40 is installed on the axis J of the driven wheel 22, in this embodiment, the force sensor 40a is arranged at the bottom 92 of the material to be cut 9. The force sensor 40a is, for example, at least one axial force sensor, having an axial (parallel to the Z-axis direction) force sensing direction, parallel to the cutting direction D2. The feeding module 30 is connected to the driving module 20, and is configured to drive the driving module 20 and the cutting wire 10 to abut against the top 91 of the material to be cut 9 along the cutting direction D2. The force sensor 40a can sense the tension of the cutting wire 10 through the reaction force. In this way, the control module 50 (such as Figure 2As shown), the force sensor 40a can receive the tension of the cutting wire 10 sensed by the force sensor 40a, and control the feeding module 30 according to the tension of the cutting wire 10, thereby driving the driving module 20 and the cutting wire 10 to feed the material 9 to be cut along the cutting direction D2 or controlling the driving wheel 21 of the driving module 20 to drive the rotation rate of the cutting wire 10. Since the force sensor 40a is installed on the side of the material 9 to be cut, the tension of the cutting wire 10 can be measured by the reaction force, and the real-time tension during sawing can be directly and accurately measured, thereby controlling the downward feed rate of the feeding module 30 or the rotation speed of the driving wheel 21 by the accurate tension, and realizing the application of automatic adjustment parameters. Of course, the control module 50 (as shown) Figure 2 The control parameters of the driving module 20 and the feeding module 30 can be adjusted according to actual application requirements, but the present invention is not limited thereto.

[0066] From the above, please refer to Figure 2 、 Figure 3 and Figure 8 When the cutting wire 10 cuts the material 9 to be cut, the load fluctuates violently. If the cutting load is too small when the material removal rate of the material 9 to be cut is low, the advantage of the efficient cutting of the circular cutting wire 10 cannot be fully utilized. If the cutting load is too large when the material removal rate of the material 9 to be cut is high, the cutting quality cannot be guaranteed, which may eventually lead to poor cutting effect and reduced service life of the cutting wire 10. Since the automatic feeding device 1 of the wire cutting machine in this case can sense the tension change of the cutting wire 10 through the force sensors 40 and 40a, it can control the feeding module 30 to drive the driving module 20 and the cutting wire 10 to a feed rate relative to the material 9 to be cut along the cutting direction D2 or control the driving wheel 21 of the driving module 20 to drive the cutting wire 10 to rotate at a certain speed. In other words, this invention also adjusts the cutting rate of the cutting wire 10 by adjusting the feed speed of the feed module 30 and / or the rotation rate of the driving active wheel 21, and also adjusts the tension of the cutting wire 10, thereby controlling the value of the actual tension measured during the cutting process and maintaining a constant cutting load, thereby improving processing efficiency and ensuring consistency in processing accuracy and quality. At the same time, since the maximum load of the cutting wire 10 is also limited, it is beneficial to maintain the cutting capacity of the cutting wire 10, improve the service life of the cutting wire, and reduce tool costs. The following further describes the control method of the automatic feed device 1, 1a of the wire cutting machine in this invention.

[0067] Based on the structure of the aforementioned automatic feeding device 1, 1a for a wire cutting machine, the control module 50 electrically connected to the force sensors 40, 40a, the drive module 20, and the feed modules 30, 30a can also sense the real-time tension of the cutting wire 10 via the force sensors 40, 40a to implement closed-loop control. First, when the automatic feeding device 1, 1a for a wire cutting machine starts a cutting operation of a material 9 to be cut, the feed modules 30, 30a drive the drive module 20 and the cutting wire 10 to approach the material 9 to be cut, and the force sensors 40, 40a enter a measurement mode to sense the real-time tension of the cutting wire 10. Of course, this embodiment is not limited to the feed module 30 driving the drive module 20 and the cutting wire 10 to approach the material 9 to be cut, or the feed module 30a driving the material 9 to be cut to approach the drive module 20 and the cutting wire 10. The following embodiment is described using the feed module 30 driving the drive module 20 and the cutting wire 10 to approach the material to be cut, and is not intended to limit this embodiment. In addition, in this embodiment, the force sensor 40 can be mounted on the axis J of the driven wheel 22 or the bottom 92 of the material 9 to be cut, but the present invention is not limited to this. Once the cutting wire 10 reaches the top 91 of the material 9 to be cut, the force sensors 40 and 40a can measure the real-time tension of the cutting wire 10. Then, the control module 50 receives the tension of the cutting wire 10 sensed by the force sensors 40 and 40a, and determines whether there is a difference between the real-time tension measured by the force sensors 40 and 40a and a predetermined optimal tension threshold value based on the measured real-time tension. The tension threshold value can be a range of optimized operating conditions. If the real-time tension measured by the force sensors 40 and 40a falls within the range of the tension threshold value, it means that the cutting wire 10 is cutting the material 9 to be cut under optimized cutting conditions.

[0068] When the control module 50 determines that the real-time tension of the cutting wire 10 measured by the force sensors 40, 40a exceeds a set tension threshold, it can be inferred that the cutting wire 10 is tending to be overloaded. At this time, the control module 50 can further determine whether it is necessary to adjust the feed rate of the driving module 20 and the cutting wire 10 driven by the feed module 30 along the cutting direction D2 relative to the material 9 to be cut, or to change the rotation rate of the driving wheel 21 of the driving module 20 driving the cutting wire 10. For example, if it is necessary to adjust the feed rate of the driving module 20 and the cutting wire 10 driven by the feed module 30 along the cutting direction D2 relative to the material 9 to be cut, the feed speed can be reduced, and / or if it is necessary to change the rotation rate of the driving wheel 21 of the driving module 20 driving the cutting wire 10, the rotation rate of the driving wheel 21 can be increased to reduce the load on the cutting wire 10 during the cutting operation, improve cutting efficiency, and achieve optimized control.

[0069] On the other hand, when the control module 50 determines that the real-time tension of the cutting wire 10 measured by the force sensors 40, 40a does not reach the set tension threshold, it can be inferred that the cutting efficiency of the cutting wire 10 is poor. At this time, the control module 50 can further determine whether it is necessary to adjust the feed rate of the driving module 20 and the cutting wire 10 driven by the feed module 30 along the cutting direction D2 relative to the material 9 to be cut, or to change the rotation rate of the driving wheel 21 of the driving module 20 driving the cutting wire 10. For example, if it is necessary to adjust the feed rate of the driving module 20 and the cutting wire 10 driven by the feed module 30 along the cutting direction D2 relative to the material 9 to be cut, the feed speed can be increased, and / or if it is necessary to change the rotation rate of the driving wheel 21 of the driving module 20 driving the cutting wire 10, the rotation rate of the driving wheel 21 can be reduced to improve the cutting efficiency of the cutting operation of the cutting wire 10 and achieve optimized control.

[0070] In this embodiment, the control module 50, electrically connected to the force sensor 40, the drive module 20, and the feed module 30, can implement closed-loop control throughout the entire cutting operation. Specifically, when the cutting wire 10 cuts the top 91 of the material 9 to be cut, the feed rate of the feed module 30 and / or the rotational speed of the driving wheel 21 are controlled based on the real-time tension of the cutting wire 10. This control continues until the cutting wire 10 reaches the bottom 92, completing the cutting operation of the material 9. The control module 50 then terminates the aforementioned closed-loop control. Thus, the automatic feed device 1, 1a of the wire cutting machine can automatically adjust the feed rate or rotational speed during the cutting operation to improve cutting efficiency and extend the cutting life of the cutting wire 10. Furthermore, the real-time tension of the cutting wire 10 measured by the force sensors 40, 40a can be used to determine the current sharpness of the cutting wire 10. The control module 50 can also saw materials of varying hardness under constant force conditions, eliminating the need for a professional technician to adjust the sawing parameters, achieving the effect of automatic parameter adjustment. Of course, the setting, adjustment and control of the parameters by the control module 50 can be adjusted according to actual application requirements, and the present invention is not limited thereto and will not be further elaborated.

[0071] In summary, this case provides an automatic feeding device for a wire cutting machine with a force sensor, which uses a force sensor installed on a driven wheel as a condition control for feeding the cutting wire, so that the feed speed can be adjusted by the reaction force of the cutting. By sensing the tension of the cutting wire through the force sensor, the feed rate can be adjusted according to a constant tension (the rate can be adjusted from top to bottom), thereby improving the cutting efficiency and also improving the cutting life of the cutting wire. Furthermore, since a force sensor is installed on the feeding device (on the driven wheel) to sense the tension of the cutting wire, the current sharpness of the cutting wire can be known, and the wire breakage problem will not occur due to excessive feeding after it becomes blunt. On the other hand, the tightness of the cutting wire can be adjusted according to the condition of constant force to saw all materials of different hardness. There is no need for professional technicians to adjust the sawing parameters. The parameter adjustment is more convenient and automated, achieving the effect of automatic parameter adjustment. When the sensor is mounted directly on the axis of the driven wheel, it can directly measure the tension of the cutting wire and accurately measure the tension during sawing, thereby controlling the downward feed rate through accurate tension. Alternatively, the sensor can be connected to the base of the material to be cut. When the cutting wire is sawing downwards, the force sensor directly below the material can sense the change in the cutting wire tension through the reaction force, thereby controlling the feed or realizing the application of automatic parameter adjustment.

[0072] The present invention may be modified in various ways by those skilled in the art without departing from the scope of the patent application.

Claims

1. An automatic feeding device for a wire cutting machine, suitable for automatically feeding a cutting wire for cutting operation, wherein: The automatic feeding device of the wire cutting machine includes: A drive module comprising a driving wheel and a driven wheel, the driving wheel and the driven wheel being spatially opposed to each other, wherein the cutting wire is wound around the driving wheel and the driven wheel, and the cutting wire is driven by the driving wheel to rotate between the driving wheel and the driven wheel, wherein the cutting wire forms a rotation direction from the driving wheel to the driven wheel; a feeding module connected to the driving module and configured to drive the driving module and the cutting wire to abut against a material to be cut along a cutting direction, wherein the rotation direction and the cutting direction are perpendicular to each other; and A force sensor is disposed on an axis of the driven wheel and is configured to sense the tension of the cutting wire.

2. The automatic feeding device for wire cutting machine according to claim 1, wherein: The device further includes a control module electrically connected to the force sensor, the driving module and the feeding module.

3. The automatic feeding device for wire cutting machine according to claim 1, wherein: The force sensor includes a force-bearing part and a fixed part, which are arranged along an axial direction, wherein the driven wheel is concentrically mounted on the force-bearing part through a bearing. The force sensor allows the force of the cutting wire acting on the driven wheel to be sensed through the force-bearing part, thereby sensing the tension of the cutting wire.

4. The automatic feeding device for a wire cutting machine according to claim 1, wherein: The driving wheel and the driven wheel have the same radius, are arranged parallel to each other and are located at the same horizontal height, wherein the cutting wire is wound around the outer periphery of the driving wheel and the driven wheel.

5. An automatic feeding device for a wire cutting machine, suitable for automatically feeding a cutting wire for cutting operation, wherein: The automatic feeding device of the wire cutting machine includes: A drive module comprising a driving wheel and a driven wheel, the driving wheel and the driven wheel being spatially opposed to each other, wherein the cutting wire is wound around the driving wheel and the driven wheel, and the cutting wire is driven by the driving wheel to rotate between the driving wheel and the driven wheel, wherein the cutting wire forms a rotation direction from the driving wheel to the driven wheel; a force sensor disposed at the bottom of a material to be cut; and A feeding module is connected to the driving module and is configured to drive the driving module and the cutting wire to abut the top of the material to be cut along a cutting direction, wherein the rotation direction and the cutting direction are perpendicular to each other, and when the cutting wire abuts the top of the material to be cut, the force sensor senses the tension of the cutting wire.

6. The automatic feeding device for a wire cutting machine according to claim 5, wherein: The force sensor is a radial force sensor having a radial force sensing direction perpendicular to the cutting direction.

7. The automatic feeding device for a wire cutting machine according to claim 5, wherein: The device further includes a control module electrically connected to the force sensor, the driving module and the feeding module.

8. The automatic feeding device for a wire cutting machine according to claim 5, wherein: The force sensor is an axial force sensor having an axial force sensing direction parallel to the cutting direction.

9. The automatic feeding device for a wire cutting machine according to claim 5, wherein: The driving wheel and the driven wheel have the same radius, are arranged parallel to each other and are located at the same horizontal height, wherein the cutting wire is wound around the outer periphery of the driving wheel and the driven wheel.

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