Wire electrode tension control device and wire cutting electric discharge machining equipment having the same

Abstract

This invention provides a wire tension control device. The wire tension control device is used to adjust an array of wire poles, wherein the array of wire poles includes a plurality of wire poles. The wire tension control device includes a wire feeding module and a wire tension module. The wire feeding module includes a first motor, a second motor, a wire feeding shaft, and a wire take-up shaft. The first motor is connected to the wire feeding shaft and the second motor is connected to the wire take-up shaft, which are respectively connected to the two ends of the wire poles. The first motor and the second motor are used to control and drive the wire poles to move at a wire feeding speed. The wire tension module includes a pressure rod. The pressure rod is disposed between the wire feeding shaft and the wire take-up shaft and is used to apply pressure to the wire poles to control the wire poles to have the same wire tension.

Claims

1. A wire tension control device for adjusting an array of wire poles, wherein the array of wire poles includes a plurality of wire poles, the wire tension control device comprising: a wire feeding module including a first motor, a second motor, a wire feeding shaft and a wire take-up shaft, the first motor being connected to the wire feeding shaft and the second motor being connected to the wire take-up shaft, the wire feeding shaft and the wire take-up shaft being respectively connected to the two ends of the wire poles, the first motor and the second motor being used to control and drive the wire poles to move at a wire feeding speed; and a wire tension module including a pressure bar disposed between the wire feeding shaft and the wire take-up shaft, the pressure bar contacting the wire poles and being used to apply pressure to the wire poles to control the wire poles to have the same wire tension.

2. The wire tension control device of claim 1 further includes a plurality of counterweight mechanisms disposed between the wire feed shaft and the wire take-up shaft and above the wire poles, each counterweight mechanism including a counterweight element, each counterweight mechanism contacting each wire pole and used to adjust the wire tension of each wire pole by means of the weight of the counterweight element, wherein the weight of the counterweight element is between 1g and 5g.

3. The linear tension control device of claim 1, wherein the linear tension module further includes a spring and a guide rod, the guide rod including a first end and a second end, the spring being sleeved on the first end and the pressure rod being connected to the second end, the spring being used to generate a spring restoring force to push the guide rod to move, and the guide rod driving the pressure rod to move, wherein the spring restoring force is the pressure.

4. The linear electrode tension control device as claimed in claim 1, wherein the first motor and the second motor drive the linear electrodes to move in a manner that they rotate at a constant speed.

5. The linear electrode tension control device as claimed in claim 1, wherein the first motor rotates in a manner that gradually decelerates and the second motor rotates in a manner that gradually accelerates, drives the linear electrodes to move.

6. A wire electrical discharge machining apparatus with a wire electrode tension control device, comprising: a body having a receiving space; a top cover disposed above the body; an array of wire electrodes disposed in the receiving space and including a plurality of wire electrodes for machining a workpiece; and a wire electrode tension control device, further comprising: A wire feeding module includes a first motor, a second motor, a wire feeding shaft, and a wire take-up shaft. The wire feeding shaft and the wire take-up shaft are disposed in the accommodating space. The first motor is connected to the wire feeding shaft, and the second motor is connected to the wire take-up shaft. The wire feeding shaft and the wire take-up shaft are respectively connected to the two ends of the wire electrodes. The first motor and the second motor are used to control and drive the wire electrodes to move at a wire feeding speed. A wire tension module is disposed on the upper cover. The wire tension module includes a pressure rod disposed in the accommodating space and located between the wire feeding shaft and the wire take-up shaft. The pressure rod contacts the wire electrodes and is used to apply pressure to the wire electrodes to control the wire electrodes to have the same wire tension.

7. The wire EDM apparatus with a wire electrode tension control device as claimed in claim 6 further comprises a plurality of counterweight mechanisms disposed in the receiving space and located between the wire feed shaft and the wire take-up shaft and above the wire electrodes, each counterweight mechanism comprising a counterweight element, each counterweight mechanism contacting each wire electrode and used to adjust the wire tension of each wire electrode by means of the weight of the counterweight element, wherein the weight of the counterweight element is between 1g and 5g.

8. The wire EDM apparatus with a wire tension control device as claimed in claim 6, wherein the wire tension module further includes a spring and a guide rod, the guide rod having a first end and a second end, the first end being fixed to the upper cover and the spring being sleeved on the first end, the pressure rod being connected to the second end, the spring being used to generate a spring restoring force to push the guide rod to move, and the guide rod driving the pressure rod to move, wherein the spring restoring force is the pressure.

9. The wire EDM apparatus with a wire electrode tension control device as claimed in claim 6, wherein the first motor and the second motor drive the wire electrodes to move in a manner that they rotate at a constant speed.

10. The wire EDM apparatus with a wire electrode tension control device as claimed in claim 6, wherein the first motor drives the wire electrodes to move in a manner that gradually decelerates and the second motor drives the wire electrodes in a manner that gradually accelerates.

11. The wire EDM apparatus with a wire electrode tension control device as claimed in claim 6 further includes a power module electrically connected to the array of wire electrodes, the power module including a plurality of power supply units, and the power supply units respectively providing power to the wire electrodes.

12. The wire EDM apparatus with a wire electrode tension control device as claimed in claim 6, further comprising a processing platform disposed in the accommodating space, the processing platform comprising a plurality of processing guide grooves, and the wire electrodes respectively moving in the processing guide grooves, wherein the distance between two adjacent processing guide grooves is greater than 300 μm.

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