Double-shaft numerical control drive wire storage barrel movement mechanism for wire cut electrical discharge machining tool

Abstract

A double-shaft numerical control wire storage barrel movement driving mechanism for a wire cut electrical discharge machining tool comprises a wire barrel, a left support, a right support, a carriage and a carriage seat, and is characterized in that a wire barrel rotation driving mechanism is composed of a wire barrel driving servo motor, and a wire barrel axial movement driving mechanism is mainly composed of a lead screw, a nut and a carriage driving servo motor. According to the scheme, rotation of the wire storage barrel and axial movement of the wire storage barrel are independently driven by a servo motor movement system capable of being digitally controlled, and associated movement of the rotation of the wire storage barrel and the axial movement of the wire storage barrel can be achieved by digitally controlling the servo motor. Therefore, independent numerical control movement of rotation and axial movement of the wire storage barrel can be met, and the requirement for numerical control linkage of rotation and axial movement of the wire storage barrel can be met. In this way, different requirements of the machine tool during automatic wire threading and actual cutting are well met.

Description

Technical Field

[0001] The utility model relates to the technical field of electric spark wire cutting processing, in particular to a double-axis numerical control driven wire storage drum motion mechanism for electric spark wire cutting machine tools. Background Art

[0002] CNC reciprocating wire EDM (wire EDM) machines (WEDMs) are widely used as metal cutting equipment for machining complex, precise parts in a variety of manufacturing industries, including molds, aerospace, automotive, energy, precision instruments, medical devices, and electronics. They play a vital role in industrial production. Wire EDM utilizes a continuously moving thin metal wire (called an electrode wire) as an electrode to erode metal and cut the workpiece into shape using pulsed spark discharges. Wire threading is required both before and during the wire cutting process. Currently, most WEDMs require manual threading. Manual threading is highly specialized and requires specialized personnel. It is also complex, demanding, labor-intensive, and inefficient. To address this, researchers have been diligently researching and developing fully automatic wire threading devices and methods for WEDMs. Fully automatic wire threading is a complex and detailed system engineering in the field of wire-cut EDM technology. It has high process requirements, many difficulties and high technical difficulty. It has long been a technical problem in this field. Among them, how to design the wire storage drum movement mechanism and realize numerical control of the wire storage drum is one of the technical difficulties that need to be overcome.

[0003] The electrode of the CNC reciprocating wire EDM machine completes the EDM cutting of the workpiece through the reciprocating motion of hundreds of meters long molybdenum wire. The machine tool realizes the reciprocating motion of the electrode wire by the reciprocating motion of the wire storage drum through the circumferential rotation and axial wire arrangement motion, so that the electrode wire is wound and arranged in an orderly manner on the wire storage drum.

[0004] The existing wire drum motion mechanism uses a wire drum shaft that is rotatably mounted on a wire drum support. The wire drum support is fixedly connected to a carriage, which is connected to the carriage seat via guide rails. The carriage is driven by a screw-nut pair, allowing it to move axially along the wire drum. One end of the wire drum shaft is connected to the motor shaft, and the other end is connected to the carriage's screw drive via a gear or pulley. When the motor drives the wire drum to rotate, the gear or pulley pair drives the carriage axially along the wire drum, driving the carriage axially along the wire drum. Each rotation of the wire drum causes the carriage to move axially one wire-discharging distance. Reversing the motor drives the wire drum in the opposite direction, winding and discharging the wire, resulting in a reciprocating cycle. This motion mechanism synchronizes the rotation and axial movement of the wire drum, preventing them from moving independently. However, automated wire threading in machine tools requires both independent and coordinated rotation and digital control of the wire drum's axial movement. To address this technical problem, the present utility model designs a motion mechanism that allows both independent and coordinated digital control of the rotation and axial movement of the wire drum. Utility Model Content

[0005] The utility model provides a dual-axis CNC driven wire drum motion mechanism for an electric spark wire cutting machine tool, which aims to solve the problem that the existing wire drum motion mechanism cannot satisfy the problem that the wire drum rotation and axial movement can be both independently CNC-controlled and CNC-linked.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a dual-axis CNC-driven wire storage drum motion mechanism for an electric spark wire cutting machine tool, comprising a wire drum, a left support, a right support, a carriage, a carriage seat, a wire drum rotation drive mechanism, and a wire drum movement drive mechanism, wherein:

[0007] The wire drum is rotatably mounted on the left and right supports through the wire drum shaft. The left and right supports are fixedly mounted on the carriage. The carriage is linearly connected to the carriage seat. The carriage movement direction is parallel to the wire drum axis. The carriage seat is fixed relative to the machine tool.

[0008] Its innovation lies in:

[0009] The wire drum rotation drive mechanism is mainly composed of a wire drum drive servo motor, which is connected to the wire drum shaft to drive the wire drum to rotate around its own axis in a numerically controlled manner.

[0010] The wire drum moving drive mechanism is mainly composed of a screw rod, a nut and a carriage driving servo motor. The screw rod is rotatably installed relative to the carriage seat, the screw rod axis is parallel to the wire drum axis, the nut is fixedly installed relative to the carriage, the screw rod and the nut are coaxially matched, and the carriage driving servo motor is connected to the screw rod drive, thereby driving the wire drum to perform CNC movement along its own axis direction.

[0011] The relevant contents of the above technical solution are explained as follows:

[0012] 1. In the above scheme, a guide rail pair is set between the carriage and the carriage seat. The guide rail pair consists of a guide rail and a slider. One of the guide rail and the slider is fixed relative to the carriage, and the other is fixed relative to the carriage seat. In the assembled state, the guide rail and the slider are in rolling cooperation, and the moving direction of the slider is parallel to the axis of the wire drum.

[0013] 2. In the above solution, a wire drum motor seat is provided for the wire drum driving servo motor, the wire drum motor seat is fixedly connected to the right support, and the wire drum driving servo motor is fixedly installed on the right support through the wire drum motor seat.

[0014] 3. In the above solution, a carriage motor base is provided for the carriage drive servo motor, the carriage motor base is fixedly connected to the carriage base, and the carriage drive servo motor is fixedly mounted on the carriage base through the carriage motor base.

[0015] 4. In the above solution, the wire drum driving servo motor is fixedly connected to the protruding end of the wire drum shaft through a coupling.

[0016] 5. In the above scheme, the output end of the carriage-driven servo motor has a screw-nut pair in which the screw and the motor shaft are integrated, wherein the carriage-driven servo motor is fixedly connected to the carriage seat through the carriage motor seat, and the nut is fixedly connected to the carriage through the nut seat.

[0017] 6. In the above solution, a screw seat is provided for the lead screw, the lead screw is rotatably connected to the screw seat, and the screw seat is fixedly mounted on the carriage seat. A nut seat is provided for the nut, the nut is fixedly connected to the nut seat, and the nut seat is fixedly mounted on the carriage. The carriage drive servo motor is fixedly connected to the carriage seat via the carriage motor seat, and the output shaft of the carriage drive servo motor is fixedly connected to the lead screw extension shaft via another coupling.

[0018] 7. In the above solution, the carriage driving servo motor and the screw are connected through a gear pair or a pulley pair.

[0019] 8. In the above solution, a travel switch is provided for the axial movement of the wire drum. The travel switch is arranged between the carriage and the carriage seat in the direction of movement and is used to control the extreme position of the axial movement of the wire drum.

[0020] The design principle and concept of this utility model are as follows: To address the problem that existing wire drum motion mechanisms cannot satisfy the requirement for both independent numerical control and numerical linkage of wire drum rotation and axial movement, this utility model independently drives the wire drum rotation and axial movement using a set of digitally controlled servo motor motion systems, while the linked movement of the wire drum rotation and axial movement can be achieved through digital control of the servo motor. This satisfies the requirement for both independent numerical control of the wire drum rotation and axial movement, as well as the requirement for numerical linkage of the wire drum rotation and axial movement. Therefore, it effectively solves the technical problem that when a machine tool performs automated wire threading, the wire drum rotation and axial wire discharge movement need to be both independent and linked, and digitally controlled.

[0021] Due to the application of the above technical solution, the utility model has the following advantages and effects:

[0022] 1. This utility model innovatively designs a wire transport and arrangement mechanism with independent CNC drive for wire drum rotation and drag plate movement, achieving more control functions and meeting the requirements of automatic wire threading of machine tools. Specifically, under the control of the machine tool control system:

[0023] (1) The wire drum drive servo motor can drive the wire drum to independently perform digital circumferential positioning, and determine the circumferential clamping and wire releasing position of the wire drum wire clamp during the automatic wire threading process;

[0024] (2) The carriage drive servo motor can drive the carriage to make independent digital movements, and determine the relative axial position of the wire drum, wire clamp and electrode wire during automatic wire threading;

[0025] (3) The wire drum drive servo motor drives the wire drum to rotate and the carriage drive servo motor drives the carriage axial movement for CNC linkage;

[0026] First, according to the requirements of automatic wire threading, large and small pitches can be linked to complete wire winding and wire arrangement;

[0027] Second, it can collect and release the wire according to the requirements of automatic wire threading;

[0028] Third, during processing, reciprocating, high-speed wire winding and wire arranging are carried out according to the wire arrangement distance requirements;

[0029] (4) The rotation speed of the silk drum and the movement speed of the drag plate are digitally adjustable;

[0030] (5) The length of the wire can be digitally calculated and controlled, and the electrode wire used for discharge cutting can be digitally controlled in sections and partitions according to processing requirements.

[0031] 2. The utility model adopts a carriage driven servo motor to independently drive the carriage, which adds a servo motor but eliminates the transmission gear (pulley) and transmission belt. By adopting a servo motor with its own lead screw, the rotating support seat and bearing of the lead screw are eliminated, resulting in a simple structure and easy assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Attachment Figure 1 This is a front view of an embodiment of the utility model;

[0033] Attachment Figure 2 This is a top view of an embodiment of the utility model;

[0034] Attachment Figure 3 It is a left view of an embodiment of the present utility model.

[0035] In the above figures: 1. Left support; 2. Wire drum clamp; 3. Wire drum; 4. Wire drum shaft; 5. Right support; 6. Coupling; 7. Wire drum motor seat; 8. Wire drum drive servo motor; 9. Slide plate; 10. Slide plate seat; 11. Slide plate drive servo motor; 12. Slide plate motor seat; 13. Screw rod; 14. Nut; 15. Nut seat; 16. Guide rail; 17. Slider; 18. Travel switch. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0037] Example: A dual-axis CNC-driven wire storage drum motion mechanism for wire-cut electric discharge machines

[0038] like Figure 1-3As shown, the dual-axis CNC driven wire storage drum motion mechanism includes a wire drum 3, a left support 1, a right support 5, a carriage 9, a carriage seat 10, a wire drum rotation drive mechanism and a wire drum movement drive mechanism (see Figure 1 ).in:

[0039] The wire drum 3 is rotatably mounted on the left support 1 and the right support 5 via the wire drum shaft 4 (see Figure 1 ), the left support 1 and the right support 5 are fixedly mounted on the carriage 9 (see Figure 1 ), the carriage 9 is connected to the carriage seat 10 by linear movement (see Figure 1 ), the moving direction of the carriage 9 is parallel to the axis of the yarn drum 3 (see Figure 1 ), the carriage seat 10 is fixed relative to the machine tool (see Figure 1 ).

[0040] The wire drum rotation drive mechanism is mainly composed of a wire drum drive servo motor 8 (see Figure 1 ), the wire drum drive servo motor 8 is connected to the wire drum shaft 4. In this embodiment, the wire drum drive servo motor 8 is fixedly connected to the protruding end of the wire drum shaft 4 through the coupling 6 (see Figure 1 ), thereby driving the wire drum 3 to perform numerically controlled rotation around its own axis.

[0041] The wire drum moving drive mechanism is mainly composed of a screw rod 13, a nut 14 and a carriage driving servo motor 11 (see Figure 1 ), the screw rod 13 is rotatably mounted relative to the carriage seat 10, the axis of the screw rod 13 is parallel to the axis of the wire drum 3, the nut 14 is fixedly mounted relative to the carriage 9, the screw rod 13 and the nut 14 are coaxially matched, the carriage drive servo motor 11 is connected to the screw rod 13, thereby driving the wire drum 3 to move along its own axis in a numerically controlled manner. In this embodiment, in order to simplify the structure and reduce costs, the output end of the carriage drive servo motor 11 is equipped with a screw rod and a nut pair (see Figure 1 ), wherein the carriage drive servo motor 11 is fixedly connected to the carriage seat 10 via the carriage motor seat 12 (see Figure 1 ), the nut 14 is fixedly connected to the carriage 9 via a nut seat 15. However, the present invention is not limited to this embodiment. A screw seat (not shown) may be provided for the screw rod 13, with the screw rod 13 rotatably connected to the screw seat, which is then fixedly mounted on the carriage seat 10. A nut seat 15 is also provided for the nut 14, with the nut 14 fixedly connected to the nut seat 15, which is then fixedly mounted on the carriage 9. The carriage drive servo motor 11 is fixedly connected to the carriage seat 10 via the carriage motor seat 12. The output shaft of the carriage drive servo motor 11 is fixedly connected to the extended shaft of the screw rod 13 via another coupling. Alternatively, the carriage drive servo motor 11 and the screw rod 13 may be connected via a gear pair or pulley pair. These are all concepts readily understood and appreciated by those skilled in the art.

[0042] In this embodiment, a guide rail pair is provided between the carriage 9 and the carriage seat 10, and the guide rail pair is composed of a guide rail 16 and a slider 17 (see FIG. Figure 3 ), one of the guide rail 16 and the slider 17 is fixed relative to the carriage 9, and the other is fixed relative to the carriage seat 10. In the assembled state, the guide rail 16 and the slider 17 are in rolling engagement, and the moving direction of the slider 17 is parallel to the axis of the wire drum 3. Specifically in this embodiment, the guide rail 16 is fixedly connected to the carriage seat 10, and the slider 17 is fixedly connected to the carriage 9 (see Figure 3 ).

[0043] In this embodiment, a wire drum motor seat 7 (see FIG. Figure 1 ), the wire drum motor seat 7 is fixedly connected to the right support 5, and the wire drum drive servo motor 8 is fixedly installed on the right support 5 through the wire drum motor seat 7 (see Figure 1 ).

[0044] In this embodiment, a carriage motor base 12 is provided for the carriage drive servo motor 11 (see Figure 1 ), the carriage motor base 12 is fixedly connected to the carriage base 10, and the carriage drive servo motor 11 is fixedly installed on the carriage base 10 through the carriage motor base 12 (see Figure 1 ).

[0045] In this embodiment, a travel switch 18 is provided for the axial movement of the wire drum 3 (see FIG. Figure 3 ), the travel switch 18 is arranged between the carriage 9 and the carriage seat 10 in the moving direction, and is used to control the extreme position of the axial movement of the wire drum 3.

[0046] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A dual-axis CNC driven wire storage drum motion mechanism for an electric spark wire cutting machine tool, comprising a wire drum (3), a left support (1), a right support (5), a carriage (9), a carriage seat (10), a wire drum rotation drive mechanism, and a wire drum movement drive mechanism, wherein: The wire drum (3) is rotatably mounted on a left support (1) and a right support (5) via a wire drum shaft (4); the left support (1) and the right support (5) are fixedly mounted on a carriage (9); the carriage (9) is linearly connected to a carriage seat (10); the movement direction of the carriage (9) is parallel to the axis of the wire drum (3); and the carriage seat (10) is fixed relative to the machine tool; Its characteristics are: The wire drum rotation drive mechanism is mainly composed of a wire drum drive servo motor (8), which is connected to the wire drum shaft (4) to drive the wire drum (3) to rotate around its own axis in a numerically controlled manner; The wire drum moving drive mechanism mainly consists of a screw rod (13), a nut (14) and a carriage driving servo motor (11), wherein the screw rod (13) is rotatably mounted relative to the carriage seat (10), the axis of the screw rod (13) is parallel to the axis of the wire drum (3), the nut (14) is fixedly mounted relative to the carriage (9), the screw rod (13) and the nut (14) are coaxially matched, and the carriage driving servo motor (11) is drivingly connected to the screw rod (13), thereby driving the wire drum (3) to perform numerical control movement along its own axis direction.

2. The dual-axis CNC driven wire storage drum motion mechanism according to claim 1, characterized in that: A guide rail pair is provided between the carriage (9) and the carriage seat (10), and the guide rail pair is composed of a guide rail (16) and a slider (17). One of the guide rail (16) and the slider (17) is fixed relative to the carriage (9), and the other is fixed relative to the carriage seat (10). In the assembled state, the guide rail (16) and the slider (17) are in rolling engagement, and the moving direction of the slider (17) is parallel to the axis of the wire drum (3).

3. The dual-axis CNC driven wire storage drum motion mechanism according to claim 1, characterized in that: A wire drum motor seat (7) is provided for the wire drum driving servo motor (8), the wire drum motor seat (7) is fixedly connected to the right support (5), and the wire drum driving servo motor (8) is fixedly mounted on the right support (5) through the wire drum motor seat (7).

4. The dual-axis CNC driven wire storage drum motion mechanism according to claim 1, characterized in that: A carriage motor base (12) is provided for the carriage drive servo motor (11), the carriage motor base (12) is fixedly connected to the carriage base (10), and the carriage drive servo motor (11) is fixedly mounted on the carriage base (10) through the carriage motor base (12).

5. The dual-axis CNC driven wire storage drum motion mechanism according to claim 1, characterized in that: The wire drum driving servo motor (8) is fixedly connected to the protruding end of the wire drum shaft (4) via a coupling (6).

6. The dual-axis CNC driven wire storage drum motion mechanism according to claim 1, characterized in that: The output end of the carriage driving servo motor (11) is provided with a screw nut pair in which a screw and a motor shaft are integrated, wherein the carriage driving servo motor (11) is fixedly connected to the carriage seat (10) via the carriage motor seat (12), and the nut (14) is fixedly connected to the carriage (9) via the nut seat (15).

7. The dual-axis CNC driven wire storage drum motion mechanism according to claim 1, characterized in that: A screw seat is provided for the screw rod (13), the screw rod (13) is rotatably connected to the screw seat, and the screw seat is fixedly mounted on the carriage seat (10); a nut seat (15) is provided for the nut (14), the nut (14) is fixedly connected to the nut seat (15), and the nut seat (15) is fixedly mounted on the carriage (9). The carriage drive servo motor (11) is fixedly connected to the carriage seat (10) through the carriage motor seat (12), and the output shaft of the carriage drive servo motor (11) is fixedly connected to the extended shaft of the screw rod (13) through another coupling.

8. The dual-axis CNC driven wire storage drum motion mechanism according to claim 7, characterized in that: The carriage driving servo motor (11) and the screw rod (13) are connected via a gear pair or a pulley pair.

9. The numerically controlled wire storage drum movement mechanism according to claim 1, characterized in that: A travel switch (18) is provided for the axial movement of the wire drum (3). The travel switch (18) is arranged between the carriage (9) and the carriage seat (10) in the movement direction and is used to control the extreme position of the axial movement of the wire drum (3).

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