CN114905103A - Numerical control wire cutting machining equipment and automatic wire threading method thereof - Google Patents

Abstract

The invention relates to a numerical control wire cutting processing device and an automatic wire feeding method thereof, and the structure of the device comprises a rack, wherein a wire barrel, a bearing frame and a conductive workbench are arranged on the rack; the wire barrel is movably arranged on the frame, and the electrode wire is coiled on the wire barrel; an upper wire frame device and a lower wire frame device for the wire electrode to move are arranged on the bearing frame; the conductive working table is insulated and separated from the frame and is positioned between the upper wire frame device and the lower wire frame device; the wire feeding frame device and the wire discharging frame device are respectively and movably arranged on the bearing frame, and/or the conductive workbench is movably arranged on the rack; the wire feeding frame device or the wire discharging frame device is provided with a connecting sleeve device for storing and automatically pushing a connecting sleeve and a wire shearing and connecting device for shearing and connecting electrode wires. This structure can realize many times conversion angle and circulation wiring, threading work to also can carry out complicated automatic processing operation in unmanned on duty, and promote the machining precision, the practicality is strong.

Description

Numerical control wire cutting machining equipment and automatic wire threading method thereof

Technical Field

The invention relates to numerical control wire cutting processing equipment and an automatic wire threading method thereof.

Background

The numerical control wire cutting processing is a branch of electric spark processing, and is to cut a workpiece by utilizing a wire electrode (molybdenum wire, copper wire and zinc wire) through spark discharge. In the numerical control linear cutting machining, the relative motion of a workpiece and a wire electrode is controlled by digital information, and the numerical control linear cutting machining tool is commonly used for machining high-hardness materials, fine structures, complex shapes, high-precision size parts and high-surface-quality parts.

Numerically controlled wire cutting machines are generally classified into three categories: a fast wire-moving linear cutting machine, a medium wire-moving linear cutting machine and a slow wire-moving linear cutting machine; taking a fast wire-moving linear cutting machine as an example, the wire electrode reciprocates at a high speed, and the wire-moving speed is 8m/s to 10 m/s. The working principle is as follows: the electrode wire passes through a small hole pre-drilled on a workpiece and is driven by a wire barrel through a guide wheel to reciprocate and alternately move, the workpiece is arranged on a conductive working table through an insulating plate, and the conductive working table moves in two coordinate directions of a horizontal plane X, Y respectively according to a given control program to synthesize a curve track of any plane. The pulse power supply applies pulse voltage to the electrode wire and the workpiece, the electrode wire is connected with the negative pole of the pulse power supply, and the workpiece is connected with the positive pole of the pulse power supply. When an electric pulse is coming, a spark discharge is generated between the electrode wire and the workpiece, the instantaneous temperature of the center of a discharge channel can reach more than 10000 ℃, the high temperature melts the metal of the workpiece and even gasifies a small amount, the high temperature also gasifies part of the working solution between the electrode wire and the workpiece, and the gasified working solution and metal steam are instantaneously and rapidly thermally expanded and have the characteristic of explosion. The thermal expansion and the local micro-explosion eject the melted and gasified metal material to realize the electro-erosion cutting processing of the workpiece material.

In view of the above structure, the existing numerical control wire cutting machine tool needs manual wire threading, the wire threading needs professional operation, the process is complex, in the wire cutting process, if other cutting needs to be processed on the same workpiece, a worker needs to watch, after the cutting is finished at a position, the wire threading is performed manually, the cutting of the next round is finished, the production efficiency is low, and the processing cost is high.

Therefore, further improvements are necessary.

Disclosure of Invention

The invention aims to provide numerical control wire cutting processing equipment and an automatic wire feeding method thereof, so as to overcome the defects in the prior art.

A numerical control wire-electrode cutting processing equipment who designs according to this purpose includes the frame, its characterized in that: the frame is provided with a wire barrel, a bearing frame and a conductive workbench.

The wire barrel is movably arranged on the rack, and the electrode wire is coiled on the wire barrel.

And the carrying frame is provided with an upper wire frame device and a lower wire frame device for the wire electrode to run.

The conductive workbench is insulated and separated from the rack and is positioned between the upper wire rack device and the lower wire rack device.

The upper coil holder device and the lower coil holder device are respectively and movably arranged on the bearing frame, and/or the conductive workbench is movably arranged on the rack.

And the wire feeding frame device or the wire discharging frame device is provided with a connecting sleeve device for storing and automatically pushing a connecting sleeve and a wire shearing and connecting device for shearing and connecting the electrode wire.

The frame is provided with a wire barrel frame, and the wire barrel frame slides back and forth on the frame; the wire barrel rotates on the wire barrel frame in a reciprocating mode, and a groove used for collecting the electrode wires and/or the connection sleeve is formed in the wire barrel frame.

The lower bobbin device comprises a lower bobbin X shaft seat, a lower bobbin Y shaft seat and a lower bobbin Z shaft seat.

And the lower frame X shaft seat is in guide type left-right sliding fit with the lower frame Y shaft seat.

And the lower frame Y shaft seat is in guide type up-and-down sliding fit with the lower frame Z shaft seat.

And the lower frame Z shaft seat is in guide type front-back sliding fit with the bearing frame.

A lower traction wheel set and a lower lead wheel set are also arranged on the lower frame X shaft seat; the lower lead wheel set is arranged at the outer end of the lower frame X shaft seat; the lower frame X-axis seat is provided with a lower clamp and a lower lead driver corresponding to the lower lead wheel group; an off-line winding and unwinding buffer group is further arranged between the lower traction wheel group and the lower lead wheel group; and the lower traction wheel set, the lower lead wheel set or the lower line winding and unwinding buffer group is also provided with a lower line tension detector.

The wire feeding rack device comprises a feeding X shaft seat, a feeding Y shaft seat and a feeding Z shaft seat.

And the upper frame X shaft seat is in guide type left-right sliding fit with the upper frame Y shaft seat.

And the upper frame Y shaft seat is in guide type up-and-down sliding fit with the upper frame Z shaft seat.

And the upper frame Z shaft seat is in guide type front-back sliding fit with the bearing frame.

An upper traction wheel set and an upper wire wheel set are also arranged on the upper frame X shaft seat; the upper lead wheel set is arranged at the outer end of the upper frame X shaft seat; the upper frame X shaft seat is provided with an upper clamp and an upper lead driver corresponding to the upper lead wheel group; an upper line receiving and releasing buffer group is also arranged between the upper traction wheel group and the upper lead wheel group; and an on-line tension detector is further arranged on the upper traction wheel set, the upper wire guide wheel set or the on-line winding and unwinding buffer group.

The connection sleeve device comprises a connection sleeve frame, a connection sleeve register and an ejector; the connecting sleeve frame is movably arranged on the wire feeding frame device; the connecting sleeve register is disassembled and assembled on the connecting sleeve frame, and a plurality of connecting sleeves are stored on the connecting sleeve register; the ejector is movably arranged on the connecting sleeve register and pushes the connecting sleeves one by one to the connecting ports of the connecting sleeve register when moving.

The wire shearing and refuting device comprises a wire shearing and refuting frame and a wire shearing and refuting device; the wire shearing and connecting frame is movably arranged on the wire feeding frame device; the wire shearing and plugging device is a pneumatic shearing pliers knife and is arranged on the wire shearing and plugging frame and moves along with the wire shearing and plugging frame and is close to a plugging port of the plugging sleeve device.

The wire shearing and connecting device is provided with a shearing position and a clamping position.

The wire shearing and refuting device shears the electrode wire through the shearing position.

The wire shearing and plugging device clamps the plugging sleeve through the cutter clamping position so as to realize that the broken ends of the two electrode wires in the plugging sleeve are connected.

And a drill bit is also arranged on the wire feeding frame device or the wire discharging frame device.

An automatic wire feeding method of numerical control wire cutting processing equipment is characterized in that: the original positions of the upper traction wheel set and the lower traction wheel set are used as positioning coordinate axes of the wire guide shaft, and the system can control the upper traction wheel set and the lower traction wheel set to move at any point in a set stroke range;

when the electrode wires need to be transferred from one processing hole to another processing hole, the upper and lower clamping devices are started, the electrode wires on the upper side and the lower side of the conductive workbench are fixed, the tension of the electrode wires of the wire barrel is kept, the connection sleeve device is started to cut the electrode wires on the upper side and the lower side of the conductive workbench to form an opening, and the lower traction wheel set is reversed to retract the electrode wires without tension and keep the broken ends of the electrode wires at the position close to the port of the lower clamping device; then, the upper wire frame device and the lower wire frame device respectively slide back and forth and left and right, or the conductive workbench drives the workpiece to slide back and forth and left and right; until the electrode wire on the upper wire frame device is aligned above the working wire penetrating hole, the electrode wire on the lower wire frame device is aligned below the working wire penetrating hole, at the moment, the lower wire frame device moves to be close to the workpiece along the Y-axis direction, the broken end of the electrode wire on the lower wire frame device is opposite to the working wire penetrating hole, the lower traction wheel set rotates forwards, the lower wire winding and unwinding buffer group is used for unwinding the wire and leading out the electrode wire, the wire penetrates through the workpiece and penetrates into the connection sleeve, the upper traction wheel set rotates forwards, the upper wire winding and unwinding buffer group is used for unwinding the wire and leading out the electrode wire, and the wire penetrates through the workpiece and penetrates into the connection sleeve; starting the connecting sleeve device, connecting broken ends of the two electrode wires, loosening the upper and lower clamping devices, storing the section of the electrode wire with the recovered connecting sleeve in a groove by a wire barrel, and setting the electrode wire of the connecting sleeve section as a non-working section when the subsequent linear cutting machining works in a reciprocating manner; during the working process, the upper wire frame device and the lower wire frame device can be opposite to or staggered, so that the workpiece can be processed into conical surfaces, straight holes and curved surfaces with irregular angles.

Through the improvement of the structure, compared with the prior art, the invention has the following advantages:

1. the wire barrel can rotate relative to the rack and slide back and forth, so that the problem that the wire electrode and/or the connection sleeve are damaged due to uneven winding, accumulation and contact friction with the rack or the wire barrel rack when the wire electrode and/or the connection sleeve are wound and released is effectively solved, and the wire electrode and/or the connection sleeve can be uniformly distributed on the wire barrel.

2. The lower frame X shaft seat provided with the lower traction wheel set and the lower lead wheel set can slide left, right, up, down, front and back relative to the conductive workbench on the rack, so that the wire electrode of the lower wire frame device can be as close as possible to and aligned with the workpiece wire penetrating hole of the conductive workbench when the wire electrode penetrates, the wire penetrating connection precision of the wire electrode is improved, the wire penetrating quality of the wire electrode is guaranteed, and the problem that the wire electrode breaks when working is avoided.

3. The upper frame X-axis seat provided with the upper traction wheel set, the upper lead wheel set, the connection sleeve device and the shearing wire feeding device can slide left, right, up, down and front relative to the conductive workbench on the frame, so that the electrode wire positioned on the upper wire frame device can be close to and aligned with the workpiece wire feeding hole of the conductive workbench as much as possible when the wire is fed, the wire feeding connection precision of the electrode wire is improved, the wire feeding quality of the electrode wire is ensured, and the problem that the electrode wire is broken when the electrode wire works is avoided.

4. The sleeve device of plugging into can deposit a plurality of sleeve of plugging into to be convenient for numerical control wire cut electrical discharge machining equipment can hold a plurality of sleeves of plugging into in order to accomplish the continuous work of plugging into of wire electrode, improves production efficiency, simultaneously, the silk device of plugging into of cutting can realize cutting of wire electrode, also can mutually support with the sleeve device of plugging into, realize that the wire electrode of two breakdowns plugs into, and then let whole last line frame device can realize the walking silk of wire electrode, disconnection, and plug into, in order to satisfy numerical control wire cut electrical discharge machining equipment's continuous processing demand.

5. The drill bit can follow the upper wire frame device or the lower wire frame device can drill a workpiece placed on the conductive workbench when moving left, right, up, down, front and back, so that the workpiece can be placed on the conductive workbench without drilling in advance, the convenience and the efficiency of workpiece cutting and processing are improved, the positions of the wire penetrating holes of the workpiece can be quickly and accurately found by two disconnected electrode wires when the electrode wires are connected, and the connection efficiency of the electrode wires is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1-3 are schematic perspective views of an embodiment of the present invention.

Fig. 4 is a schematic front structure diagram according to an embodiment of the invention.

Fig. 5 is a schematic top view of the structure according to an embodiment of the invention.

Fig. 6 and 7 are schematic views of the assembly structure of the receiving frame, the feeding frame device, the connection sleeve device and the wire cutting device.

Fig. 8 and 9 are schematic exploded structural diagrams of the receiving frame, the wire feeding frame device, the connection sleeve device and the wire shearing and connecting device.

Fig. 10 and 11 are schematic views of the assembling structure of the receiving frame and the lower rack device.

Fig. 12 and 13 are schematic exploded structural views of the receiving frame and the lower rack device.

Fig. 14 and 15 are schematic partial enlarged assembly structure diagrams of the upper thread frame device, the connection sleeve device and the wire cutting device.

Fig. 16 and 17 are schematic partial enlarged and exploded structural diagrams of the upper thread frame device, the connection sleeve device and the wire cutting device.

Fig. 18 is a schematic sectional assembly structure diagram of the connection sleeve device and the wire shearing device.

Fig. 19 and 20 are schematic exploded structural views of the connection sleeve device.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

The invention is further described with reference to the following figures and examples.

Referring to fig. 1-20, the numerical control wire cutting processing device comprises a frame 1, wherein a wire barrel 3, a bearing frame 11 and a conductive workbench (not shown in the figure, a workpiece 29 is arranged above the conductive workbench, and the conductive workbench is similar to a frame shape) are arranged on the frame 1.

The wire cylinder 3 is movably arranged on the frame 1 and is wound with the electrode wire 5.

The supporting frame 11 is provided with an upper wire frame device A and a lower wire frame device B for the wire electrode 5 to run.

The conductive workbench is insulated and separated from the machine frame 1 and is positioned between the upper wire frame device A and the lower wire frame device B.

The wire feeding frame device A and the wire discharging frame device B are respectively and movably arranged on the bearing frame 11, and/or the conductive workbench is movably arranged on the machine frame 1. Namely, the upper wire frame device A, the lower wire frame device B and the conductive workbench can be movably matched with each other.

The wire feeding frame device A or the wire discharging frame device B is provided with a connecting sleeve device C for storing and automatically pushing the connecting sleeve 34 and a wire shearing and connecting device D for shearing and connecting the electrode wire 5.

Specifically, a silk tube frame 2 is arranged on the frame 1, and the silk tube frame 2 slides back and forth on the frame 1; the wire cylinder 3 rotates back and forth on the wire cylinder frame 2 and is provided with a groove 6 for collecting the electrode wire 5 and/or the connection sleeve 34.

The silk tube frame 2 is arranged on the frame 1, and a silk tube frame driving device is arranged between the silk tube frame and the frame 1; the silk tube frame 2 slides on the frame 1 back and forth under the driving of the silk tube frame driving device; a wire cylinder driving device 4 is arranged between the wire cylinder 3 and the wire cylinder frame 2; the wire drum 3 is rotated back and forth on the wire drum frame 2 by the wire drum driving device 4.

In the embodiment, the wire barrel 3 can rotate on the wire barrel frame 2 in a reciprocating manner by using the driving action of the wire barrel driving device 4, and meanwhile, the wire barrel frame 2 can slide on the rack 1 in a front-back manner by using the driving action of the wire barrel frame driving device, so that the wire barrel 3 can finally rotate and slide in a front-back manner relative to the rack 1, and the problems that the electrode wire 5 and/or the connection sleeve 34 are damaged due to uneven winding and unwinding, accumulation and contact friction with the rack 1 or the wire barrel frame 2 are effectively avoided, so that the electrode wire 5 and/or the connection sleeve 34 can be uniformly distributed on the wire barrel 3.

Since the wire barrel frame 2 can slide back and forth on the machine frame 1, the electrode wires 5 can be collected on the wire barrels 3, and the connection sleeves 34 can be collected on the grooves 6.

Wherein the cover 34 of plugging into can be used for two electrode wires 5 of disconnection to plug into, plug into the cover 34 when using the back, need collect it, plug into the cover 34 simultaneously its surface can be higher than the surface of electrode wire 5 when using, consequently will plug into cover 34 and collect on recess 6, can avoid the winding influence to electrode wire 5, guarantees that electrode wire 5 can smoothly receive and release on a silk section of thick bamboo 3.

The groove 6 is positioned at the end part or the middle part of the wire cylinder 3 and is annularly and concavely arranged along the periphery of the wire cylinder 3 or is concavely arranged at any position on the surface of the wire cylinder 3. Namely, the groove 6 can be annularly concave at any position of the periphery of the wire cylinder 3, and can also be concave at any position of the surface of the wire cylinder 3.

The groove 6 is preferably annularly and concavely arranged along the periphery of one end of the wire barrel 3, so that not only is more electrode wires 5 wound, but also the interference of the connection sleeve 34 on the electrode wires 5 during collection can be avoided.

Further, the two ends of the wire barrel 3 are respectively provided with a limiting part 7 for limiting the winding position of the electrode wire 5 and/or the connection sleeve 34. This spacing portion 7 can be injectd wire electrode 5 and the winding position of the cover 34 of plugging into to avoid wire electrode 5 and the cover 34 of plugging into because of unable spacing when collecting, break away from the problem of a silk section of thick bamboo 3, improve a collection stability of a silk section of thick bamboo 3 to wire electrode 5 and the cover 34 of plugging into.

In order to improve the rotation stability of the wire barrel 3, bearing seats 8 are respectively arranged at two ends of the wire barrel 3 and respectively rotate on the wire barrel frame 2 through the bearing seats 8. The wire cylinder driving device 4 is fixedly arranged on the wire cylinder frame 2, and the power output end of the wire cylinder driving device is in driving connection with one end of the wire cylinder 3. The wire barrel 3 can rotate on the wire barrel frame 2 in a reciprocating mode through the matching of the wire barrel driving device 4 and the bearing seat 8, and the rotating direction of the wire barrel is shown by an arrow in fig. 3.

In order to ensure that the wire barrel frame 2 can stably and smoothly slide on the rack 1, a Z-axis guide rail 9 of the wire barrel frame is arranged between the wire barrel frame 2 and the rack 1; the silk tube frame 2 is guided to slide on the frame 1 in a reciprocating way through a silk tube frame Z-axis guide rail 9.

Further, a Z-axis guide rail 9 of the wire bobbin holder is horizontally and fixedly arranged on the rack 1; the silk tube frame 2 is provided with a silk tube frame Z-axis slide block 10, and the silk tube frame Z-axis slide block 10 is in guiding fit with a silk tube frame Z-axis guide rail 9. In the embodiment, the guide rail 9 of the bobbin frame Z axis is preferably fixed on the frame 1 in the front-back direction, so that the bobbin frame 2 can slide on the frame 1 in the front-back direction through the matching of the guide rail 9 of the bobbin frame Z axis and the slide block 10 of the bobbin frame Z axis.

The silk tube frame driving device and the silk tube driving device 4 are servo driving motors or pneumatic drivers. The wire barrel holder driving device and the wire barrel driving device 4 of the present embodiment preferably employ a servo driving motor.

In this embodiment, a ball screw bearing is disposed between the screw bobbin holder 2 and the frame 1, and the screw bobbin holder driving device is matched with the ball screw bearing, so that the screw bobbin holder 2 can be driven to slide back and forth on the frame 1.

As shown in fig. 10-13, the lower bobbin device B includes a lower bobbin X-axis seat 12, a lower bobbin Y-axis seat 13, and a lower bobbin Z-axis seat 14.

The lower frame X shaft seat 12 is in guiding type left-right sliding fit with the lower frame Y shaft seat 13.

The lower frame Y shaft seat 13 is in guiding type up-and-down sliding fit with the lower frame Z shaft seat 14.

The lower frame Z shaft seat 14 is in guide type front-back sliding fit with the bearing frame 11.

Further, lower frame driving components are respectively arranged between the lower frame X shaft seat 12 and the lower frame Y shaft seat 13, between the lower frame Y shaft seat 13 and the lower frame Z shaft seat 14, and between the lower frame Z shaft seat 14 and the bearing frame 11, and are respectively in sliding fit with each other left and right, up and down, and front and back through the lower frame driving components. The lower frame driving component at least comprises a driver, and the driver is a servo driving motor or a pneumatic driver.

In this embodiment, the lower frame driving components are respectively arranged between the lower frame X shaft seat 12 and the lower frame Y shaft seat 13, between the lower frame Y shaft seat 13 and the lower frame Z shaft seat 14, and between the lower frame Z shaft seat 14 and the receiving frame 11, and the driving effects of the different lower frame driving components are utilized to enable the components to be in sliding fit with each other left and right, up and down, and front and back, so that the lower frame X shaft seat 12 provided with the lower traction wheel set 15 and the lower wire wheel set 16 can slide left and right, up and down, and front and back relative to the conductive workbench on the rack 1, and the wire electrode 5 located in the lower frame device B can be as close as possible to and aligned with the workpiece wire penetrating hole of the conductive workbench during wire penetrating, thereby improving the wire penetrating and connecting accuracy of the wire electrode 5, ensuring the wire penetrating quality of the wire electrode 5, and avoiding the problem that the wire electrode 5 breaks during operation.

The lower frame driving component is a servo driving motor or a pneumatic driver. The lower carriage driving assembly of this embodiment preferably employs a servo driving motor.

Specifically, a lower frame X-axis driving assembly is arranged between the lower frame X-axis seat 12 and the lower frame Y-axis seat 13, and the lower frame X-axis driving assembly comprises a lower frame X-axis ball screw bearing 17 and a lower frame X-axis servo driving motor 18.

The lower frame X-axis ball screw bearing 17 is arranged between the lower frame X-axis seat 12 and the lower frame Y-axis seat 13; the lower frame X-axis servo driving motor 18 is fixedly arranged on the lower frame X-axis seat 12 or the lower frame Y-axis seat 13, and the power output end of the lower frame X-axis servo driving motor is in driving connection with the lower frame X-axis ball screw bearing 17.

A lower frame X-axis guide rail 19 and a lower frame X-axis sliding block 20 are also arranged between the lower frame X-axis seat 12 and the lower frame Y-axis seat 13 and are in guiding type left-right sliding fit through the lower frame X-axis guide rail 19 and the lower frame X-axis sliding block 20.

The lower frame X-axis servo driving motor 18 of the embodiment is fixedly arranged on a lower frame Y-axis seat 13, a lower frame X-axis guide rail 19 is arranged on one side surface of the lower frame Y-axis seat 13, a lower traction wheel set 15 and a lower lead wheel set 16 are respectively arranged on one side surface of a lower frame X-axis seat 12, and a lower frame X-axis sliding block 20 is arranged on the other side surface of the lower frame X-axis seat 12. The lower frame X shaft seat 12 can slide on the lower frame Y shaft seat 13 in a guiding mode through the matching of a lower frame X shaft ball screw bearing 17, a lower frame X shaft servo driving motor 18, a lower frame X shaft guide rail 19 and a lower frame X shaft sliding block 20.

Further, a lower frame Y-axis driving assembly is arranged between the lower frame Y-axis seat 13 and the lower frame Z-axis seat 14, and the lower frame Y-axis driving assembly includes a lower frame Y-axis ball screw bearing 21 and a lower frame Y-axis servo driving motor 22.

The lower frame Y-axis ball screw bearing 21 is arranged between the lower frame Y-axis seat 13 and the lower frame Z-axis seat 14; the lower frame Y-axis servo driving motor 22 is fixedly arranged on the lower frame Y-axis seat 13 or the lower frame Z-axis seat 14, and the power output end of the lower frame Y-axis servo driving motor is in driving connection with the lower frame Y-axis ball screw bearing 21.

A lower frame Y-axis guide rail 23 and a lower frame Y-axis slide block 24 are also arranged between the lower frame Y-axis seat 13 and the lower frame Z-axis seat 14 and are in guiding type up-and-down sliding fit with each other through the lower frame Y-axis guide rail 23 and the lower frame Y-axis slide block 24.

In this embodiment, the lower carriage Y axis servo driving motor 22 is fixedly arranged on the lower carriage Z axis seat 14, the lower carriage Y axis guide rail 23 is arranged on one side surface of the lower carriage Z axis seat 14, and the lower carriage Y axis slide block 24 is arranged on the other side surface of the lower carriage Y axis seat 13. The lower frame Y-axis seat 13 can slide on the lower frame Z-axis seat 14 in a guiding manner up and down through the matching of a lower frame Y-axis ball screw bearing 21, a lower frame Y-axis servo drive motor 22, a lower frame Y-axis guide rail 23 and a lower frame Y-axis slide block 24.

Further, a lower frame Z-axis driving assembly is arranged between the lower frame Z-axis seat 14 and the bearing frame 11, and the lower frame Z-axis driving assembly comprises a lower frame Z-axis ball screw bearing 25 and a lower frame Z-axis servo driving motor 26.

The lower Z-axis ball screw bearing 25 is arranged between the lower Z-axis seat 14 and the bearing frame 11; the lower frame Z-axis servo drive motor 26 is fixedly arranged on the lower frame Z-axis seat 14 or the bearing frame 11, and the power output end of the lower frame Z-axis servo drive motor is in driving connection with the lower frame Z-axis ball screw bearing 25.

A lower Z-axis guide rail 27 and a lower Z-axis slide block 28 are also arranged between the lower Z-axis seat 14 and the bearing frame 11, and are in guiding type front-back sliding fit through the lower Z-axis guide rail 27 and the lower Z-axis slide block 28.

The lower frame Z-axis servo driving motor 26 of the embodiment is fixedly arranged on the bearing frame 11, the lower frame Z-axis guide rail 27 is arranged at the bottom of the bearing frame 11, and the lower frame Z-axis slide block 28 is arranged at the top of the lower frame Z-axis seat 14. The lower frame Z-axis seat 14 can slide on the bearing frame 11 in a guiding type through the matching of a lower frame Z-axis ball screw bearing 25, a lower frame Z-axis servo drive motor 26, a lower frame Z-axis guide rail 27 and a lower frame Z-axis slide block 28.

The lower lead wheel set 16 is arranged at the outer end of the lower frame X shaft seat 12; the lower frame X shaft seat 12 is provided with a lower clamp and a lower lead driver corresponding to the lower lead wheel set 16; the lower clamp is arranged to fix the electrode wire 5 on the lower wire wheel set 16 and maintain the tension of the electrode wire 5, and the lower wire driver is arranged to drive the electrode wire 5 on the lower wire wheel set 16 so that the electrode wire 5 can slide towards the direction of the workpiece wire through hole.

An offline winding and unwinding buffer group 30 is further arranged between the lower traction wheel group 15 and the lower lead wheel group 16, and partial wire electrodes 5 can be buffered on the lower frame X shaft seat 12 through the offline winding and unwinding buffer group 30, so that the wire electrodes 5 can be connected for use.

The lower traction wheel set 15, the lower lead wheel set 16 or the lower wire winding and unwinding buffer group 30 are further provided with a lower wire tension detector, and the lower wire tension detector can be used for detecting tension of the electrode wire 5, so that the tension is ensured at the time of wire winding of the electrode wire 5 on the lower traction wheel set 15, the lower lead wheel set 16 and the lower wire winding and unwinding buffer group 30, and the stability of the electrode wire 5 during wire winding on the lower wire frame device B is improved.

As shown in fig. 6-9, the upper line frame device a includes an upper frame X axis seat 50, an upper frame Y axis seat 51, and an upper frame Z axis seat 52.

The upper frame X shaft seat 50 is in guiding type left-right sliding fit with the upper frame Y shaft seat 51.

The upper frame Y shaft seat 51 is in guiding type up-and-down sliding fit with the upper frame Z shaft seat 52.

The upper frame Z shaft seat 52 is in guide type front-back sliding fit with the bearing frame 11.

Further, upper frame driving components are respectively arranged between the upper frame X shaft seat 50 and the upper frame Y shaft seat 51, between the upper frame Y shaft seat 51 and the upper frame Z shaft seat 52, and between the upper frame Z shaft seat 52 and the bearing frame 11, and are respectively in sliding fit with each other left and right, up and down, and front and back through the driving components.

In this embodiment, the upper frame driving components are respectively arranged between the upper frame X-axis seat and the upper frame Y-axis seat, between the upper frame Y-axis seat and the upper frame Z-axis seat, and between the upper frame Z-axis seat and the receiving frame, and the driving effects of different upper frame driving components are utilized to enable the components to respectively realize left-right, up-down, front-back sliding fit, so as to finally enable the upper traction wheel set 53, the upper lead wheel set 54, the connection sleeve device C, and the connection wire device D to slide left, right, up, down, front and back relative to the conductive workbench on the rack 1, so that the wire electrode 5 located on the upper frame device a can be as close as possible to the workpiece wire penetrating hole of the conductive workbench during wire penetrating, thereby improving the wire penetrating and connecting accuracy of the wire electrode 5, ensuring the wire penetrating quality of the wire electrode 5, and avoiding the problem that the wire electrode 5 breaks during operation.

Moreover, the connecting sleeve device C can store a plurality of connecting sleeves 34, so that the numerical control wire-electrode cutting processing equipment can hold a plurality of connecting sleeves 34 to complete continuous connecting work of the electrode wire 5, the production efficiency is improved, meanwhile, the wire cutting device D can realize cutting of the electrode wire 5 and can also be matched with the connecting sleeve device C to realize connecting of two disconnected electrode wires 5, and further the whole wire feeding frame device A can realize wire feeding, disconnecting and connecting of the electrode wire 5 to meet the continuous processing requirements of the numerical control wire-electrode cutting processing equipment.

The upper frame driving component is a servo driving motor or a pneumatic driver. The racking drive assembly of this embodiment preferably employs a servo drive motor.

Specifically, an upper frame X-axis driving assembly is arranged between the upper frame X-axis seat 50 and the upper frame Y-axis seat 51, and the upper frame X-axis driving assembly comprises an upper frame X-axis ball screw bearing 57 and an upper frame X-axis servo driving motor 58.

The upper frame X-axis ball screw bearing 57 is arranged between the upper frame X-axis seat 50 and the upper frame Y-axis seat 51; the upper frame X-axis servo driving motor 58 is fixedly arranged on the upper frame X-axis seat 50 or the upper frame Y-axis seat 51, and the power output end of the upper frame X-axis servo driving motor is in driving connection with the upper frame X-axis ball screw bearing 57.

An upper frame X-axis guide rail 59 and an upper frame X-axis sliding block 60 are further arranged between the upper frame X-axis seat 50 and the upper frame Y-axis seat 51 and are in guiding type left-right sliding fit with each other through the upper frame X-axis guide rail 59 and the upper frame X-axis sliding block 60.

An upper frame X-axis servo driving motor 58 of the embodiment is fixedly arranged on an upper frame Y-axis seat 51, an upper frame X-axis guide rail 59 is arranged on one side surface of the upper frame Y-axis seat 51, an upper traction wheel set 53, an upper conducting wire wheel set 54 and a wire shearing and plugging device D are respectively arranged on one side surface of an upper frame X-axis seat 50, and an upper frame X-axis slide block 60 and a plugging sleeve device C are arranged on the other side surface of the upper frame X-axis seat 50. The upper frame X-axis seat 50 can slide on the upper frame Y-axis seat 51 in a guiding manner through the matching of an upper frame X-axis ball screw bearing 57, an upper frame X-axis servo drive motor 58, an upper frame X-axis guide rail 59 and an upper frame X-axis sliding block 60.

An upper frame Y-axis driving assembly is arranged between the upper frame Y-axis seat 51 and the upper frame Z-axis seat 52 and comprises an upper frame Y-axis ball screw bearing 61 and an upper frame Y-axis servo driving motor 62.

The upper frame Y-axis ball screw bearing 61 is arranged between the upper frame Y-axis seat 51 and the upper frame Z-axis seat 52; an upper frame Y-axis servo drive motor 62 is fixedly arranged on the upper frame Y-axis seat 51 or the upper frame Z-axis seat 52, and the power output end of the upper frame Y-axis servo drive motor is in driving connection with an upper frame Y-axis ball screw bearing 61.

An upper frame Y-axis guide rail 63 and an upper frame Y-axis slide block 64 are also arranged between the upper frame Y-axis seat 51 and the upper frame Z-axis seat 52 and are in guiding type up-and-down sliding fit with each other through the upper frame Y-axis guide rail 63 and the upper frame Y-axis slide block 64.

An upper rack Y-axis servo driving motor 62 of the embodiment is fixedly arranged on an upper rack Z-axis seat 52, an upper rack Y-axis guide rail 63 is arranged on one side surface of the upper rack Z-axis seat 52, and an upper rack Y-axis sliding block 64 is arranged on the other side surface of the upper rack Y-axis seat 51. The upper frame Y-axis seat 51 can slide on the upper frame Z-axis seat 52 in a guiding manner up and down through the matching of an upper frame Y-axis ball screw bearing 61, an upper frame Y-axis servo drive motor 62, an upper frame Y-axis guide rail 63 and an upper frame Y-axis slide block 64.

An upper Z-axis driving assembly is arranged between the upper Z-axis seat 52 and the bearing frame 11 and comprises an upper Z-axis ball screw bearing 65 and an upper Z-axis servo driving motor 66.

The upper frame Z-axis ball screw bearing 65 is arranged between the upper frame Z-axis seat 52 and the bearing frame 11; the upper frame Z-axis servo drive motor 66 is fixedly arranged on the upper frame Z-axis seat 52 or the bearing frame 11, and the power output end of the upper frame Z-axis servo drive motor is in driving connection with the upper frame Z-axis ball screw bearing 65.

An upper frame Z-axis guide rail 67 and an upper frame Z-axis slide block 68 are also arranged between the upper frame Z-axis seat 52 and the bearing frame 11, and are in guiding type front-back sliding fit through the upper frame Z-axis guide rail 67 and the upper frame Z-axis slide block 68.

The upper Z-axis servo drive motor 66 of the embodiment is fixedly arranged on the bearing frame 11, the upper Z-axis guide rail 67 is arranged at the top of the bearing frame 11, and the upper Z-axis slide block 68 is arranged at the bottom of the upper Z-axis seat 52. The upper Z-axis seat 52 can slide on the bearing frame 11 in a guiding manner through the matching of an upper Z-axis ball screw bearing 65, an upper Z-axis servo drive motor 66, an upper Z-axis guide rail 67 and an upper Z-axis slide block 68.

The upper lead wheel set 54 is arranged at the outer end of the upper frame X shaft seat 50; the upper frame X shaft seat 50 is provided with an upper clamp and an upper lead driver corresponding to the upper lead wheel group 54; the upper clamp can fix the electrode wire 5 on the upper lead wheel group 54 and keep the tension of the electrode wire 5, and the upper lead driver can drive the electrode wire 5 on the upper lead wheel group 54, so that the electrode wire 5 can slide towards the direction of the workpiece wire-through hole.

An online reeling and unreeling buffer group 69 is also arranged between the upper traction wheel group 53 and the upper lead wheel group 54; the upper wire take-up and pay-off buffer group 69 can buffer part of the electrode wires 5 on the upper rack X-axis seat 50, so that the electrode wires 5 can be used in a connection mode.

An upper line tension detector is also arranged on the upper traction wheel set 53, the upper lead wheel set 54 or the upper line releasing and storing buffer set 69. The setting of the online tension detector can detect the tension of the electrode wire 5, so that the electrode wire 5 can ensure the tension at the time of wire running on the upper traction wheel set 53, the upper lead wheel set 54 and the online reeling and releasing buffer set 69, and the stability of the electrode wire 5 during wire running on the upper wire rack device A is improved.

As shown in fig. 14 to 20, the docking sleeve device C includes a docking sleeve holder 31, a docking sleeve register 32, and an ejector 33; the connection sleeve frame 31 is movably arranged on the upper wire frame device A; the connection sleeve register 32 is disassembled and assembled on the connection sleeve frame 31, and a plurality of connection sleeves 34 are stored on the connection sleeve register; the ejector 33 is movably disposed on the docking sleeve register 32, and pushes a plurality of docking sleeves 34 one by one onto the docking ports 35 of the docking sleeve register 32 during movement.

This embodiment is provided with the cover device C of plugging into on last line frame device A, the cover register 32 of plugging into of cover device C of utilizing can deposit a plurality of cover 34 of plugging into, thereby be convenient for the wire cutting machine can hold a plurality of cover 34 of plugging into in order to accomplish the work of plugging into in succession of wire electrode 5, and the production efficiency is improved, and the ejector 33 on the cover register 32 of plugging into can push a plurality of cover 34 of plugging into automatically one by one to the mouth 35 of plugging into, so that two wire electrodes 5 that supply to break can penetrate the cover 34 both ends of plugging into respectively, thereby let the wire cutting device D of plugging into that sets up on last line frame device A accomplish two wire electrode 5 broken ends and connect, and the processing cost is low.

Specifically, a register cavity 36 is arranged in the connection sleeve register 32; the connecting sleeves 34 are adhered together in a straight line by the adhesive, so that the connecting sleeves 34 are stored in the storage cavity 36 in a front-back arrangement manner during assembly, and the assembly is convenient.

The connection port 35 is arranged at one end of the connection sleeve register 32 in a vertically penetrating manner; the connection port 35 is provided with a connection sleeve limiting portion 37 corresponding to the connection sleeve 34.

When the connection sleeve 34 is pushed to the connection port 35, the connection sleeve 34 can be limited on the connection sleeve limiting portion 37, and meanwhile, the upper and lower ports of the connection sleeve 34 are communicated with the upper and lower ports of the connection port 35, so that the electrode wire 5 can pass through the connection sleeve 34, and the connection sleeve 34 can move up and down on the connection port 35.

In order to facilitate the carrying and placing of the connection sleeve 34, the other end of the connection sleeve register 32 is provided with a storage port; a plurality of the connecting sleeves 34 are stored in the deposit cavity 36 through the storage ports; meanwhile, the plug 38 is mounted on the storage port.

When the connection sleeve 34 needs to be received, the plug 38 is detached from the storage opening, and the connection sleeve 34 can be stored in the storage cavity 36 through the storage opening. When the placement of the docking sleeve 34 is complete, the plug 38 is re-fitted over the storage opening to prevent foreign objects from entering the storage cavity 36 through the storage opening.

An elastic element 72 is arranged between the ejector 33 and the plug 38 or the connection sleeve register 32; the ejector 33 is elastically movably disposed in the storage cavity 36 through the elastic member 72, and pushes the plurality of docking sleeves 34 one by one onto the docking port 35 during movement.

The elastic member 72 may be a compression spring or a tension spring, and the elastic force thereof can act between the ejector 33 and the plug 38 or the connection sleeve register 32, so that the ejector 33 can move elastically toward the connection port 35, and the connection sleeves 34 can be pushed onto the connection port 35 one by one.

The elastic member 72 of this embodiment is a compression spring, one end of which is elastically positioned and sleeved on the ejector 33, and the other end of which is elastically positioned and sleeved on the plug head 38, and has a simple structure.

In order to facilitate the assembly of the connection sleeve frame 31, a register assembly part 39 is arranged on the connection sleeve frame 31; the docking sleeve register 32 is attached to and detached from the register mounting portion 39. That is, the docking cradle 31 can be removed from the register mounting portion 39 to facilitate the placement of several docking cradles 34 on the docking cradle registers 32.

Further, a first extension arm 40 is arranged on the upper line frame device a, a connection sleeve frame Z-axis guide rail 41 and a connection sleeve frame Z-axis slide block 42 are arranged between the first extension arm 40 and the connection sleeve frame 31, and are in guiding type front-back movable fit with each other through the connection sleeve frame Z-axis guide rail 41 and the connection sleeve frame Z-axis slide block 42.

In this embodiment, a Z-axis servo driving motor of the connection sleeve frame is disposed on the connection sleeve frame 31 or the first extension arm 40, the Z-axis servo driving motor of the connection sleeve frame can drive the connection sleeve frame 31, meanwhile, a Z-axis guide rail 41 of the connection sleeve frame is disposed on the first extension arm 40, and a Z-axis slider 42 of the connection sleeve frame is disposed on the connection sleeve frame 31. The connection sleeve frame 31 can move on the first extension arm 40 in a guiding manner in front through the matching of a connection sleeve frame Z-axis servo drive motor, a connection sleeve frame Z-axis guide rail 41 and a connection sleeve frame Z-axis slide block 42.

The wire cutting device D comprises a wire cutting frame 43 and a wire cutting device 44; the wire cutting frame 43 is movably arranged on the wire feeding frame device A; the wire shearing and plugging device 44 is a pneumatic shearing and clamping knife, is arranged on the wire shearing and plugging frame 43, moves along with the wire shearing and plugging frame 43 and is close to the plugging port 35 of the plugging sleeve device C.

The wire cutting device 44 is provided with a cutting position 70 and a clamping position 71, wherein the cutting position 70 is located at the rear side of the clamping position 71.

The wire cutter 44 cuts the wire electrode 5 through the cutting position 70.

The wire cutting device 44 clamps the connection sleeve 34 through the pincer position 71 to realize the broken connection of the two electrode wires 5 in the connection sleeve 34.

The connection sleeve 34 is an aluminum pipe, the wire shearing and connecting device 44 utilizes the shearing position 70 to shear the electrode wire 5, and utilizes the clamping position 71 to clamp, press and deform the connection sleeve 34 to the inner space thereof for clamping; when the two ends of the cut wire electrode 5 are inserted into the aluminum pipe, the two ends are clamped in the clamping and pressing deformed connection sleeve 34 by the wire cutting device 44.

Because the plurality of the connection sleeves 34 are adhered together, the forceps position 71 can pull the connection sleeve 34 positioned at the forefront while clamping the connection sleeve 34, so that the connection sleeve 34 positioned at the forefront is separated from other connection sleeves 34, and the broken end connection of two electrode wires is completed.

Since the foremost connection sleeve 34 is separated from the other connection sleeves 34, the wire cartridge 3 can collect the connection sleeve 34 and the connected wire electrode.

That is, the wire cutting and plugging device 44 not only can cut the wire electrode 5, but also can be matched with the plugging sleeve device C to plug two disconnected wire electrodes 5.

The wire feeding frame device A is provided with a second extension arm 45, a cut-and-refute frame Z-axis guide rail 46 and a cut-and-refute frame Z-axis slide block 47 are arranged between the second extension arm 45 and the cut-and-refute frame 43, and are in guiding type front-back movable fit with each other through the cut-and-refute frame Z-axis guide rail 46 and the cut-and-refute frame Z-axis slide block 47.

In this embodiment, the first extension arm 40 extends toward one side of the upper bobbin assembly a, and the second extension arm 45 extends toward the other side of the upper bobbin assembly a.

A cut-and-refute wire frame Z-axis servo driving motor is arranged on the cut-and-refute wire frame 43 or the second extension arm 45, the cut-and-refute wire frame Z-axis servo driving motor can drive the cut-and-refute wire frame 43, meanwhile, a cut-and-refute wire frame Z-axis guide rail 46 is arranged on the second extension arm 45, and a cut-and-refute wire frame Z-axis slide block 47 is arranged on the cut-and-refute wire frame 43. The refuting wire cutting frame 43 can move on the second extension arm 45 in a guiding manner in front through the matching of a refuting wire cutting frame Z-axis servo drive motor, a refuting wire cutting frame Z-axis guide rail 46 and a refuting wire cutting frame Z-axis slide block 47.

The scissor positions 70 and the pincer positions 71 of the wire cutting and plugging device 44 correspond to the connection port 35 in a front-back manner, and can move away from and close to each other, so that the wire electrode 5 can be conveniently moved, disconnected and plugged.

And a drill bit is also arranged on the wire feeding frame device A or the wire discharging frame device B.

Furthermore, the conducting workbench of the embodiment is fixedly arranged, a workpiece is placed on the conducting workbench, the workpiece is drilled with a workpiece wire penetrating hole through a drill, the workpiece can be placed on the conducting workbench without drilling in advance, the convenience and the efficiency of workpiece cutting processing are improved, the positions of the workpiece wire penetrating holes can be quickly and accurately found by the two disconnected electrode wires 5 when the two disconnected electrode wires are connected, and the connection efficiency of the electrode wires 5 is improved.

The electrode wire 5 positioned on the lower wire frame device B can move towards the direction of a workpiece wire through hole through the matching of the lower traction wheel set 15 and the lower lead wheel set 16. Because the X shaft seat 12 of the lower frame can move left, right, up, down, front and back, the electrode wire 5 can also move left, right, up, down, front and back relative to the workpiece wire feeding hole, and the electrode wire 5 can be close to and aligned with the lower part of the workpiece wire feeding hole as much as possible during wire feeding, so that the problem that the electrode wire 5 is bent and deformed when entering the workpiece wire feeding hole due to self gravity is avoided, and the electrode wire 5 can be ensured to accurately enter the workpiece wire feeding hole from the lower part of the workpiece

The electrode wire 5 positioned on the upper wire frame device A can slide towards the direction of a workpiece wire through hole through the matching of the upper traction wheel set 53 and the upper lead wheel set 54. Because the upper frame X shaft seat 50 can slide left, right, up, down, front and back, the electrode wire 5 can slide left, right, up, down, front and back relative to the workpiece wire feeding hole, and the electrode wire 5 can be close to and aligned with the upper part of the workpiece wire feeding hole as much as possible when feeding the wire, so that the problem of bending deformation of the electrode wire 5 when entering the workpiece wire feeding hole is avoided, and the electrode wire 5 can enter the workpiece wire feeding hole from the upper part of the workpiece accurately.

The automatic wire feeding method of the numerical control wire cutting processing equipment comprises the following steps:

the original positions of the upper traction wheel set 53 and the lower traction wheel set 15 are used as the positioning coordinate axes of the guide wire shaft, and the system can control the upper traction wheel set 53 and the lower traction wheel set 15 to move at any point in a set travel range. When the electrode wires 5 need to be transferred from one machining hole to another machining hole, the upper and lower clamping devices are started, the electrode wires 5 on the upper side and the lower side of the conductive workbench are fixed, the tension of the electrode wires 5 of the wire barrel 3 is kept, the connecting sleeve device C is started to cut the electrode wires 5 on the upper side and the lower side of the conductive workbench to form an opening, and the lower traction wheel set 15 is reversed to collect the electrode wires 5 without tension and keep the broken ends of the electrode wires 5 at the position close to the port of the lower clamping device; then, the upper wire frame device A and the lower wire frame device B respectively slide back and forth and left and right (or the conductive workbench drives the workpiece to slide back and forth and left and right) until the wire electrode 5 on the upper wire frame device A is aligned above the working wire penetrating hole, the wire electrode 5 on the lower wire frame device B is aligned below the working wire penetrating hole, at the moment, the lower wire frame device B moves to approach the workpiece along the Y-axis direction, the broken end of the wire electrode 5 on the lower wire frame device A is aligned with the working wire penetrating hole, the lower traction wheel set 15 rotates forwards, the lower wire winding and unwinding buffer set 30 discharges the wire and guides out the wire electrode 5, the wire electrode penetrates through the workpiece and penetrates into the connecting sleeve 34, the upper traction wheel set 53 rotates forwards, and the upper wire winding and unwinding buffer set 69 discharges the wire electrode and guides out the wire electrode 5, the wire electrode penetrates through the workpiece and penetrates into the connecting sleeve 34; the connecting sleeve device C is started, the two electrode wires 5 are connected in a broken end mode, the upper clamp device and the lower clamp device are loosened, the wire barrel 3 is used for recycling the section of the electrode wire 5 with the connecting sleeve 34 and is arranged in the groove 6, and when subsequent linear cutting machining works in a reciprocating mode, the section of the electrode wire 5 with the connecting sleeve 34 is set to be an inoperative section. In the working process, the upper and lower wire tension detectors are adjusted according to the data set by the system so as to finely adjust the tension of the wire electrode 5.

The upper coil holder device A and the lower coil holder device B can be opposite to or staggered, so that the workpiece can be processed into conical surfaces, straight holes and curved surfaces with irregular angles.

The foregoing is a preferred embodiment of the present invention, and the basic principles, principal features and advantages of the invention are shown and described. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (10)

1. The utility model provides a numerical control wire cut electrical discharge machining equipment, includes frame (1), its characterized in that: the frame (1) is provided with a wire cylinder (3), a bearing frame (11) and a conductive workbench;

the wire barrel (3) is movably arranged on the rack (1) and is wound with a wire electrode (5);

an upper wire frame device (A) and a lower wire frame device (B) for the wire electrode (5) to run are arranged on the bearing frame (11);

the conductive workbench is insulated and separated from the rack (1) and is positioned between the upper line frame device (A) and the lower line frame device (B);

the wire feeding frame device (A) and the wire discharging frame device (B) are respectively and movably arranged on the bearing frame (11), and/or the conductive workbench is movably arranged on the rack (1);

and the wire feeding frame device (A) or the wire discharging frame device (B) is provided with a connecting sleeve device (C) for storing and automatically pushing a connecting sleeve (34) and a wire cutting device (D) for cutting and connecting the electrode wire (5).

2. The numerical control wire-electrode cutting machining apparatus according to claim 1, characterized in that: the frame (1) is provided with a silk tube frame (2), and the silk tube frame (2) slides back and forth on the frame (1); the wire barrel (3) rotates on the wire barrel frame (2) in a reciprocating mode, and a groove (6) used for collecting the electrode wire (5) and/or the connection sleeve (34) is formed in the wire barrel frame.

3. The numerical control wire-electrode cutting machining apparatus according to claim 1, characterized in that: the lower bobbin device (B) comprises a lower bobbin X shaft seat (12), a lower bobbin Y shaft seat (13) and a lower bobbin Z shaft seat (14);

the lower frame X shaft seat (12) is in guide type left-right sliding fit with the lower frame Y shaft seat (13);

the lower frame Y shaft seat (13) is in guide type up-and-down sliding fit with the lower frame Z shaft seat (14);

the lower frame Z shaft seat (14) is in guide type front-back sliding fit with the bearing frame (11).

4. The apparatus according to claim 3, wherein: a lower traction wheel set (15) and a lower lead wheel set (16) are also arranged on the lower frame X shaft seat (12); the lower lead wheel set (16) is arranged at the outer end of the lower frame X shaft seat (12); the lower frame X shaft seat (12) is provided with a lower clamp and a lower lead driver corresponding to the lower lead wheel set (16); an offline winding and unwinding buffer group (30) is also arranged between the lower traction wheel group (15) and the lower lead wheel group (16); the lower traction wheel set (15), the lower lead wheel set (16) or the lower line winding and unwinding buffer set (30) are further provided with a lower line tension detector.

5. The numerical control wire-electrode cutting machining apparatus according to claim 1, characterized in that: the upper wire frame device (A) comprises an upper frame X shaft seat (50), an upper frame Y shaft seat (51) and an upper frame Z shaft seat (52);

the upper frame X shaft seat (50) is in guide type left-right sliding fit with the upper frame Y shaft seat (51);

the upper frame Y shaft seat (51) is in guide type up-and-down sliding fit with the upper frame Z shaft seat (52);

the upper frame Z shaft seat (52) is in guide type front-back sliding fit with the bearing frame (11).

6. The apparatus according to claim 5, wherein: an upper traction wheel set (53) and an upper wire wheel set (54) are also arranged on the upper frame X shaft seat (50); the upper lead wheel set (54) is arranged at the outer end of the upper frame X shaft seat (50); the upper frame X shaft seat (50) is provided with an upper clamp and an upper lead driver corresponding to the upper lead wheel set (54); an upper line releasing and releasing buffer group (69) is also arranged between the upper traction wheel group (53) and the upper lead wheel group (54); an upper wire tension detector is further arranged on the upper traction wheel set (53), the upper wire guide wheel set (54) or the upper wire take-up and pay-off buffer set (69).

7. The numerical control wire-electrode cutting machining apparatus according to claim 1, characterized in that: the connection sleeve device (C) comprises a connection sleeve frame (31), a connection sleeve register (32) and an ejector (33); the connecting sleeve frame (31) is movably arranged on the upper wire frame device (A); the connecting sleeve register (32) is disassembled and assembled on the connecting sleeve frame (31) and is provided with a plurality of connecting sleeves (34); the ejector (33) is movably arranged on the connecting sleeve register (32) and pushes the connecting sleeves (34) one by one to the connecting ports (35) of the connecting sleeve register (32) when the ejector is moved.

8. The numerical control wire-electrode cutting machining apparatus according to claim 1, characterized in that: the wire shearing and refuting device (D) comprises a wire shearing and refuting frame (43) and a wire shearing and refuting device (44); the wire shearing and connecting frame (43) is movably arranged on the wire feeding frame device (A); cut and refute silk ware (44) for pneumatic scissors pincers sword, and set up cut refute on the silk frame (43), and follow cut refute silk frame (43) activity, and be close to the mouth (35) of refuting of cover device (C).

9. The apparatus according to claim 8, wherein: the wire shearing and cutting device (44) is provided with a shearing position (70) and a clamping position (71);

the wire shearing and refuting device (44) shears the electrode wire (5) through a shearing position (70);

the wire shearing and plugging device (44) clamps the plugging sleeve (34) through a forceps position (71) so as to realize the broken end connection of the two electrode wires (5) in the plugging sleeve (34).

10. An automatic wire feeding method of numerical control wire cutting processing equipment is characterized in that: the original positions of the upper traction wheel set (53) and the lower traction wheel set (15) are used as the positioning coordinate axes of the thread guide shaft, and the system can control the upper traction wheel set (53) and the lower traction wheel set (15) to move at any point in a set stroke range;

when the electrode wires (5) need to be transferred from one machining hole to another machining hole, the upper and lower clamping devices are started, the electrode wires (5) on the upper side and the lower side of the conductive workbench are fixed, the tension of the electrode wires (5) of the wire barrel (3) is kept, the connection sleeve device (C) is started to cut the electrode wires (5) on the upper side and the lower side of the conductive workbench to form an opening, and the lower traction wheel set (15) is reversed to collect the electrode wires (5) without tension and keep the broken ends of the electrode wires (5) at the position close to the port of the lower clamping device; then, the upper wire frame device (A) and the lower wire frame device (B) respectively slide back and forth and left and right, or the conductive workbench drives the workpiece to slide back and forth and left and right; until the electrode wire (5) on the upper wire frame device (A) is aligned above the working wire feed hole, the electrode wire (5) on the lower wire frame device (B) is aligned below the working wire feed hole, at the moment, the lower wire frame device (B) moves to be close to a workpiece along the Y-axis direction, the broken end of the electrode wire (5) on the lower wire frame device (B) is aligned with the working wire feed hole, the lower traction wheel set (15) rotates forwards, the lower wire winding and unwinding buffer set (30) discharges the wire, the electrode wire (5) is led out, the workpiece passes through the workpiece and penetrates into the connecting sleeve (34), the upper traction wheel set (53) rotates forwards, the upper wire winding and unwinding buffer set (69) discharges the wire, the electrode wire (5) is led out, the connecting sleeve (34) passes through the workpiece and penetrates into the connecting sleeve (34), the connecting sleeve device (C) is started, the broken ends of the two electrode wires (5) are connected, the upper clamp device and the lower clamp device are loosened, the wire cylinder (3) stores the section of electrode wire (5) recovered with the connecting sleeve (34) in a groove (6), when the subsequent linear cutting machining works in a reciprocating mode, the electrode wire (5) at the section of the connecting sleeve (34) is set as a non-working section; during the working process, the upper wire frame device (A) and the lower wire frame device (B) can be opposite to or staggered, so that the workpiece can be processed into conical surfaces, straight holes and curved surfaces with irregular angles.

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