A method for automatic wire threading in wire cutting

Abstract

The present invention discloses an automatic wire threading method for wire cutting, which at least includes the following processes: starting automatic wire threading; detecting whether copper wire exists; straightening the copper wire, if the straightening fails, outputting a result of automatic wire threading failure, if the straightening is successful, entering the next step; cutting the copper wire, if the cutting fails, outputting a result of automatic wire threading failure, if the cutting is successful, entering the next step; judging whether there is wire or not in a mechanism; if there is no wire, discharging waste wire, if the waste wire removal fails, outputting a result of automatic wire threading failure; if there is wire, entering the next step; starting wire threading, if the wire threading fails, outputting a result of automatic wire threading failure; if the wire threading is successful, outputting a result of automatic wire threading success.

Description

Technical Field

[0001] The invention relates to the technical field of wire cutting, in particular to an automatic wire threading method for wire cutting equipment. Background Art

[0002] According to existing data (360 Library), the CNC wire EDM process primarily involves the following three steps: 1. Pulse discharge between the wire electrode and the workpiece; 2. Wire-feeding motion of the wire electrode along its axial direction (vertical or Z direction); and 3. CNC-controlled motion of the workpiece relative to the wire electrode in the X and Y planes. Therefore, as the component in direct contact with the workpiece, the wire electrode plays a crucial role.

[0003] The wire transport mechanism plays a key role in the wire cutting process. A Chinese patent, with authorization publication number CN205342121U, is disclosed in the prior art. The patent is titled "A Wire Transport Mechanism for a Low-Speed Wire Cutting Machine." The mechanism includes a first pulley, a second pulley, a third pulley, a fourth pulley, a fifth pulley, a seventh pulley, a broken wire sensor, a tension sensor, a first pressure roller, a second pressure roller, a tension roller, a wire speed roller, an electrode wire, a wire drawing roller, and a wire storage drum. The wire storage drum is wound around the electrode wire, which is connected to the wire drawing roller via the first, second, third, fourth, fifth, and seventh pulleys. A tension roller, a first pressure roller, a tension sensor, and a broken wire sensor are sequentially disposed between the first and second pulleys. A wire speed roller is disposed between the fifth and seventh pulleys, and the wire speed roller cooperates with the second pressure roller.

[0004] However, there is a lack of sufficient feedback and judgment in the specific process from determining whether the copper wire exists to the final successful automatic wire threading, which is also one of the important directions for technical improvement. Summary of the Invention

[0005] The purpose of the present invention is to provide a wire cutting automatic wire threading method, which has sufficient feedback judgment links from judging whether the copper wire exists to the final successful automatic wire threading.

[0006] The object of the present invention is achieved as follows: a method for automatic wire threading of wire cutting, comprising an automatic wire threading step, which includes the following process:

[0007] 1. Start automatic threading;

[0008] 2. Detect whether copper wire exists;

[0009] 3. Straighten the copper wire. If the straightening fails, the result of automatic wire threading failure will be output. If the straightening is successful, go to the next step.

[0010] 4. Cut the copper wire. If the cutting fails, the result of automatic wire threading failure will be output. If the cutting is successful, go to the next step.

[0011] 5. Determine whether the mechanism has silk or not;

[0012] If there is no wire, the waste wire will be discharged. If the waste wire removal fails, the result of automatic wire threading failure will be output;

[0013] If there is silk, go to the next step;

[0014] 6. Start threading. If threading fails, the result of automatic threading failure will be output; if threading succeeds, the result of automatic threading success will be output.

[0015] Furthermore, the copper wire straightening step is included, and the step includes the following process:

[0016] First, the upper and lower positions of the copper wire are fixed;

[0017] Second, output the copper wire straightening tension;

[0018] 3. Switch the driver working mode;

[0019] Fourth, output copper wire straightening power supply;

[0020] 5. Driver feedback determines the process of copper wire straightening;

[0021] If there is an exception and the maximum timeout setting is exceeded, the straightening failure result will be output;

[0022] If the maximum timeout setting is not exceeded, re-judge;

[0023] Sixth, if the driver feedback determines that the copper wire straightening process is normal, the copper wire will be straightened and cooled by air blowing;

[0024] 7. The copper wire is straightened.

[0025] Furthermore, the method includes a step of determining whether the copper wire exists. During the wire transportation process, the driver AB phase feedback is used; if the copper wire exists, the output is "there is wire"; if not, the output is "no wire".

[0026] Furthermore, the step of cutting the copper wire is included, and the sub-steps of this step are as follows:

[0027] 1. The upper and lower positions of the copper wire are fixed;

[0028] 2. Output copper wire cutting tension;

[0029] 3. Switch the driver working mode;

[0030] 4. Driver feedback judgment link: if an abnormality occurs and the maximum timeout setting is exceeded, the result of shear failure will be output; if not, continue to judge;

[0031] 5. Output copper wire and cut off the power supply to start cutting operation;

[0032] 6. Determine whether the cutting is completed. If not, and the maximum timeout setting is exceeded, the result of the copper wire cutting failure is output. If the maximum timeout setting is not exceeded, continue to judge; if so, the result of the copper wire cutting completion is output.

[0033] Furthermore, the step of discharging the waste silk is included, and the sub-steps of this step are as follows:

[0034] 1. Fix the position of waste silk;

[0035] 2. Start the waste discharge wheel;

[0036] 3. Determine whether the elimination is completed. If not, the maximum timeout setting is exceeded, and the waste wire elimination fails. If it does not exceed the maximum timeout setting, re-determine; if so, the waste wire elimination is completed.

[0037] Furthermore, the wire threading step is included, which includes the following steps:

[0038] 1. Start threading the silk;

[0039] 2. Go over the nose of the plane;

[0040] 3. Pass the lower nose;

[0041] 4. Pass the lower guide wheel;

[0042] 5. Rear take-up wheel;

[0043] 6. Threading is completed.

[0044] Furthermore, in the above-mentioned threading steps, each step requires winding judgment;

[0045] If yes, then determine whether the maximum number of winding times is exceeded: if yes, threading fails; if not, output winding elimination action;

[0046] If so, you can also directly perform the detour elimination action;

[0047] If not, continue with the normal wire threading operation.

[0048] The beneficial effects of the present invention are:

[0049] 1. From judging whether the copper wire exists to the final successful automatic threading, there are sufficient feedback and judgment links;

[0050] 2. In the key wire threading steps, from the beginning of wire threading to the subsequent take-up wheel, each step has a winding judgment link and a winding elimination action, which improves the process effect of the wire threading method;

[0051] 3. In the automatic wire threading process, from drawing the copper wire to starting the wire threading, each step has a judgment link, so as to strictly control the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of judging whether the copper wire exists in the present invention.

[0053] Figure 2 It is a schematic diagram of the process of straightening copper wire.

[0054] Figure 3 It is a schematic diagram of the process of cutting copper wire.

[0055] Figure 4 It is a schematic diagram of the process of waste silk discharge.

[0056] Figure 5 It is a schematic diagram of the wire threading process.

[0057] Figure 6 It is a schematic diagram of the automatic wire threading process. DETAILED DESCRIPTION

[0058] The following is a combination of the embodiments of the present invention Figure 1-6 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0059] like Figure 1-6 As shown, a wire cutting automatic wire threading method is provided, which includes the following steps.

[0060] like Figure 1 As shown in the figure, it is the step of judging whether the copper wire exists. During the wire running process, the driver AB phase feedback is used; if the copper wire exists, the output is "there is wire"; if not, the output is "no wire".

[0061] Figure 2 This is the step of straightening the copper wire. The sub-steps of this step are as follows:

[0062] First, the upper and lower positions of the copper wire are fixed;

[0063] Second, output the copper wire straightening tension;

[0064] 3. Switch the driver working mode;

[0065] Fourth, output copper wire straightening power supply;

[0066] 5. Driver feedback determines the process of copper wire straightening;

[0067] If there is an exception and the maximum timeout setting is exceeded, the straightening failure result will be output;

[0068] If the maximum timeout setting is not exceeded, re-judge;

[0069] Sixth, if the driver feedback determines that the copper wire straightening process is normal, the copper wire will be straightened and cooled by air blowing;

[0070] 7. The copper wire is straightened.

[0071] Figure 3 This is the step of cutting the copper wire. The sub-steps of this step are as follows:

[0072] 1. The upper and lower positions of the copper wire are fixed;

[0073] 2. Output copper wire cutting tension;

[0074] 3. Switch the driver working mode;

[0075] 4. Driver feedback judgment link: if an abnormality occurs and the maximum timeout setting is exceeded, the result of shear failure will be output; if not, continue to judge;

[0076] 5. Output copper wire and cut off the power supply to start cutting operation;

[0077] 6. Determine whether the cutting is completed. If not, and the maximum timeout setting is exceeded, the result of the copper wire cutting failure is output. If the maximum timeout setting is not exceeded, continue to judge; if so, the result of the copper wire cutting completion is output.

[0078] Figure 4 This is the step of discharging the waste silk. The sub-steps of this step are as follows:

[0079] 1. Fix the position of waste silk;

[0080] 2. Start the waste discharge wheel;

[0081] 3. Determine whether the elimination is completed. If not, the maximum timeout setting is exceeded, and the waste wire elimination fails. If it does not exceed the maximum timeout setting, re-determine; if so, the waste wire elimination is completed.

[0082] Figure 5 This is the threading step, which includes the following steps:

[0083] 1. Start threading the silk;

[0084] 2. Go over the nose of the aircraft;

[0085] 3. Pass the lower nose;

[0086] 4. Pass the lower guide wheel;

[0087] 5. Rear take-up wheel;

[0088] 6. Threading is completed.

[0089] In the above links, each step requires detour judgment;

[0090] If so, determine whether the maximum number of winding times is exceeded: if so, threading fails; if not, output a winding elimination action (such as controlling the forward and reverse movement of the wheel group for adjustment);

[0091] If so, you can also directly perform the detour elimination action;

[0092] If not, continue with the normal wire threading operation.

[0093] Figure 6 It is the step of automatic wire threading, including the following steps:

[0094] 1. Start automatic threading;

[0095] 2. Detect whether copper wire exists;

[0096] 3. Straighten the copper wire. If the straightening fails, the result of automatic wire threading failure will be output. If the straightening is successful, go to the next step.

[0097] 4. Cut the copper wire. If the cutting fails, the result of automatic wire threading failure will be output. If the cutting is successful, go to the next step.

[0098] 5. Determine whether the mechanism has silk or not;

[0099] If there is no wire, the waste wire will be discharged. If the waste wire removal fails, the result of automatic wire threading failure will be output;

[0100] If there is silk, go to the next step;

[0101] 6. Start threading. If threading fails, the result of automatic threading failure will be output; if threading succeeds, the result of automatic threading success will be output.

[0102] During the automatic wire threading process, the following mechanical actions are performed:

[0103] 1. The tension wheel rotates clockwise to feed the wire;

[0104] 2. The copper wire passes through the copper tube;

[0105] 3. Enter the upper nose;

[0106] 4. Holes through the workpiece;

[0107] 5. If there is an obstacle during the threading process, the winding sensing point will sense it and cause the tension wheel to reverse a certain angle, so that the copper wire can pass through smoothly.

[0108] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in the present invention, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through an intermediate connecting component, and the specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0109] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be embraced herein, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

[0110] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A wire cutting automatic wire threading method, characterized in that: Including automatic wire threading step, which includes the following process:

1. Start automatic threading; 2. Detect whether copper wire exists; 3. Straighten the copper wire. If the straightening fails, the result of automatic wire threading failure will be output. If the straightening is successful, go to the next step.

4. Cut the copper wire. If the cutting fails, the result of automatic wire threading failure will be output. If the cutting is successful, go to the next step.

5. Determine whether the mechanism has silk or not: If there is no wire, the waste wire will be discharged. If the waste wire removal fails, the result of automatic wire threading failure will be output; If there is silk, go to the next step; 6. Start threading. If threading fails, the result of automatic threading failure will be output; if threading succeeds, the result of automatic threading success will be output; The copper wire straightening step includes the following processes: First, the upper and lower positions of the copper wire are fixed; Second, output the copper wire straightening tension; 3. Switch the driver working mode; Fourth, output copper wire straightening power supply; 5. Driver feedback determines the process of copper wire straightening; If there is an exception and the maximum timeout setting is exceeded, the straightening failure result will be output; If the maximum timeout setting is not exceeded, re-judge; Sixth, if the driver feedback determines that the copper wire straightening process is normal, the copper wire will be straightened and cooled by air blowing; 7. The copper wire is straightened.

2. The automatic wire threading method for wire cutting according to claim 1, characterized in that: The method includes the steps of judging whether the copper wire exists. During the wire running process, the driver AB phase feedback is adopted. If the copper wire exists, the output is that the copper wire exists; if not, the output is that the copper wire does not exist.

3. The automatic wire threading method for wire cutting according to claim 1, characterized in that: The step of cutting the copper wire is included, and the sub-steps of this step are as follows:

1. The upper and lower positions of the copper wire are fixed; 2. Output copper wire cutting tension; 3. Switch the driver working mode; 4. Driver feedback judgment link: if an abnormality occurs and the maximum timeout setting is exceeded, the result of shear failure will be output; if not, continue to judge; 5. Output copper wire and cut off the power supply to start cutting operation; 6. Determine whether the cutting is completed. If not, and the maximum timeout setting is exceeded, the result of the copper wire cutting failure is output. If the maximum timeout setting is not exceeded, continue to judge; if so, the result of the copper wire cutting completion is output.

4. The automatic wire threading method for wire cutting according to claim 3, characterized in that: The process includes the step of discharging the waste silk, and the sub-steps of this step are as follows:

1. Fix the position of waste silk; 2. Start the waste discharge wheel; 3. Determine whether the elimination is completed. If not, the maximum timeout setting is exceeded, and the waste wire elimination fails. If it does not exceed the maximum timeout setting, re-determine; if so, the waste wire elimination is completed.

5. The automatic wire threading method for wire cutting according to claim 4, characterized in that: Including the wire threading step, which includes the following steps:

1. Start threading the silk; 2. Go over the nose of the aircraft; 3. Pass the lower nose; 4. Pass the lower guide wheel; 5. Rear take-up wheel; 6. Threading is completed.

6. The automatic wire threading method for wire cutting according to claim 5, characterized in that: In the above-mentioned threading steps, each step requires winding judgment; If yes, then determine whether the maximum number of winding times is exceeded: if yes, threading fails; if not, output winding elimination action; If so, you can also directly perform the detour elimination action; If not, continue with the normal wire threading operation.

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