CN212495844U

CN212495844U - Automatic electrode wire tension adjusting device

Info

Publication number: CN212495844U
Application number: CN202021292898.1U
Authority: CN
Inventors: 范圣耀; 曾文萱
Original assignee: Wuxi Institute of Technology
Current assignee: Wuxi Institute of Technology
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-02-09
Anticipated expiration: 2030-07-06

Abstract

The utility model relates to a wire electrode tensile force automatic regulating apparatus is applicable to the wire electrode tensile force automatic regulating of high-speed reciprocal spark-erosion wire cutting machine. An automatic electrode wire tension adjusting device is characterized by comprising a tension wheel, a pressing wheel swing arm, a swing arm fixing rotating shaft, a fixing bottom plate, an upper limiting sensor, a lower limiting sensor, a spring, an air cylinder and a controller; the device comprises a frame, a cylinder, a pressing wheel, a fixing base plate, a pressing wheel swing arm, a cylinder, a pressing wheel, a pressing base plate, an upper limiting sensor and a lower limiting sensor, wherein the cylinder is arranged on the frame; the spring is equipped with to pinch roller swing arm upside, and spring one end is fixed at pinch roller swing arm upside, and the spring other end is fixed on PMKD.

Description

Automatic electrode wire tension adjusting device

Technical Field

The utility model relates to a wire electrode tensile force automatic regulating apparatus is applicable to the wire electrode tensile force automatic regulating of high-speed reciprocal spark-erosion wire cutting machine.

Background

The influence of the high-speed reciprocating wire cut electric discharge machine on the machining precision mainly comes from the shape and position change of the electrode wire, and the tension fluctuation and the single-side discharge of the electrode wire are main factors causing the shape and position change of the electrode wire cut for many times. In the multiple machining process, asymmetric single-side discharging is unavoidable, so that the tension fluctuation of the electrode wire cut for multiple times can be effectively controlled only to stabilize the shape and position change of the electrode wire. The existing various high-speed wire-moving tension control technologies are based on a single-side gravity hammer tensioning mechanism, and when the mechanism cuts up and down wires for many times, the sudden change of the wire electrode tension inevitably causes the change of the shape and position of the wire electrode, so that the surface of a workpiece has reversing stripes penetrating through the whole cutting surface. In addition, some wire electric discharge machines use a spring type tension control mechanism. The non-constancy of the spring force itself does not meet the increasingly high processing requirements.

Therefore, the wire electrode is tensioned essentially in a hammer type tensioning mode, a spring type tensioning mode or other modes, and tension fluctuation caused by various factors of a wire conveying system is not compensated, so that the problem of stability of the tensioning force of the wire electrode cannot be solved really, and the problem of shape change of the wire electrode cannot be solved fundamentally.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned weak point provides a wire electrode tensile force automatic regulating apparatus, arouses through the wire electrode tensile force that the pinch roller floats to drive the sensor gauge head in the swing arm and remove, give the controller tensile force signal, the controller is according to tensile force size, and the cylinder is given to the give-out order, and the cylinder passes through the flexible of cylinder pole, adjusts the take-up pulley, thereby reaches the purpose of automatically regulated tensile force.

An automatic electrode wire tension adjusting device is realized by adopting the following technical scheme:

an automatic electrode wire tension adjusting device comprises a tension wheel, a pressing wheel swing arm, a swing arm fixing rotating shaft, a fixing base plate, an upper limiting sensor, a lower limiting sensor, a spring, an air cylinder and a controller.

The cylinder is installed in the frame, and the take-up pulley is equipped with on cylinder pole upper portion, and pinch roller swing arm one end is passed through swing arm fixed rotation axle and is installed in the frame, and the pinch roller is equipped with to the pinch roller swing arm other end, and pinch roller swing arm rear side is equipped with two anti-dazzling posts. The fixed baseplate is installed on the frame, and the fixed baseplate is equipped with upper limit sensor and lower limit sensor, and upper limit sensor and lower limit sensor mounted position are corresponding respectively with two shading columns of pinch roller swing arm rear side, cooperate. The upper limit sensor and the lower limit sensor are connected with the controller through control signal lines.

The spring is equipped with to pinch roller swing arm upside, and spring one end is fixed at pinch roller swing arm upside, and the spring other end is fixed on PMKD.

The upper limit sensor and the lower limit sensor adopt photoelectric sensors.

The controller adopts a PLC programmable controller.

The working principle is as follows:

the utility model provides a wire electrode tensile force automatic regulating apparatus can automatically regulated wire electrode tensile force, when spark-erosion wire cutting during operation, pinch roller 6 presses on the wire electrode in the motion, if the tensile force is too big, the wire electrode can tighten, raise the pinch roller, the pinch roller can drive the pinch roller swing arm like this, use fixed rotation axis as the center, clockwise upwards rotate, thereby drive the shading post at the pinch roller swing arm back, block up spacing photoelectric sensor, it gives controller (PLC) to go up spacing sensor signals, the controller sends the instruction and gives the cylinder, the cylinder pole shrink, reduce the take-up pulley and give the wire electrode tensile force. Vice versa, if the tensioning force undersize, the wire electrode can loosen and collapse, put the pinch roller down, the pinch roller can drive the pinch roller swing arm like this, use the fixed rotation axis of swing arm as the center, anticlockwise rotation, thereby drive the shading post at the pinch roller swing arm back, cover lower spacing photoelectric sensor, lower spacing sensor signals gives controller (PLC), the controller gives the instruction and gives the cylinder, the cylinder pole is flexible, it is upwards to stimulate the pinch roller swing arm through the spring, increase take-up pulley 1 and give the wire electrode tensioning force, reach the purpose of automatically regulated tensile force.

The utility model provides a wire electrode tensile force automatic regulating apparatus reasonable in design, compact structure, owing to be provided with the take-up pulley, the pinch roller swing arm, the fixed rotation axis of swing arm, PMKD, go up spacing sensor, lower spacing sensor, a spring, cylinder and controller, it floats to arouse the pinch roller through the wire electrode tensile force, thereby it removes to drive the sensor gauge head in the swing arm, give the controller to tensile force signal, the controller is according to tensile force size, send the instruction for the cylinder, the cylinder passes through the flexible of cylinder pole, adjust the take-up pulley, thereby reach the purpose of automatically regulated tensile force. In the machining process, the wire electrode is not directly contacted with a workpiece, and the influence of various factors on the machining precision is finally expressed in the form of the vibration form and position change of the wire electrode. The automatic electrode wire adjusting device has the advantages that the tensioning force has great influence on the vibration of the electrode wire, the phenomenon that the shape and position of the electrode wire are changed abnormally due to the fact that the tensioning force fluctuates due to factors such as reciprocating wire moving and creep relaxation of the electrode wire can be avoided, and the purposes of stabilizing the processing performance and improving the processing precision are achieved finally.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of an automatic electrode wire tension adjusting device.

Fig. 2 is a schematic view of an installation structure of an upper limit sensor and a lower limit sensor of an automatic electrode wire tension adjusting device.

In the figure: 1. the tensioning wheel, 2, cylinder pole, 3, cylinder, 4, pinch roller swing arm, 5, swing arm fixed rotation axis, 6, pinch roller, 7, PMKD, 8, spring, 9, wire electrode, 10, go up spacing sensor, 11, lower spacing sensor, 12, shading post.

Detailed Description

Referring to the attached drawings 1 and 2, the automatic electrode wire tension adjusting device comprises a tension wheel 1, a compression wheel 6, a compression wheel swing arm 4, a swing arm fixing rotating shaft 5, a fixing bottom plate 7, an upper limiting sensor 10, a lower limiting sensor 11, a spring 8, an air cylinder 3 and a controller.

The cylinder 3 is installed in the frame, and the take-up pulley 1 is equipped with on 2 upper portions of cylinder pole, and 4 one ends of pinch roller swing arm are installed in the frame through swing arm fixed rotation axis 5, and pinch roller 6 is equipped with to the 4 other ends of pinch roller swing arm, and 4 rear sides of pinch roller swing arm are equipped with two shading columns 12. The fixed base plate 7 is installed on the frame, the fixed base plate 7 is provided with an upper limit sensor 10 and a lower limit sensor 11, and the installation positions of the upper limit sensor 10 and the lower limit sensor 11 are respectively corresponding to and matched with two shading columns 12 on the rear side of the pinch roller swing arm 4. The upper limit sensor 10 and the lower limit sensor 11 are connected with the controller through control signal lines.

Spring 8 is equipped with to the 4 upside of pinch roller swing arm, and 8 one ends of spring are fixed on 4 upsides of pinch roller swing arm, and the other end of spring 8 is fixed on PMKD 7.

The upper limit sensor 10 and the lower limit sensor 11 adopt photoelectric sensors.

The controller adopts a PLC programmable controller.

The utility model provides a wire electrode tensile force automatic regulating apparatus can the automatic adjustment 9 tensile forces of wire electrode, when spark-erosion wire cutting during operation, pinch roller 6 presses on the wire electrode 9 in the motion, if the tensile force is too big, wire electrode 9 can be tightened, lift pinch roller 6, pinch roller 6 can drive pinch roller swing arm 4 like this, use fixed rotation axis 5 as the center, clockwise rotation upwards, thereby drive the shading post 12 at the 4 backs of pinch roller swing arm, cover upper limit photoelectric sensor, it gives controller (PLC) to go up spacing sensor 10 signals, the controller sends the instruction and gives the cylinder, the cylinder pole shrink, reduce take-up pulley 1 and give wire electrode 9 tensile force. Vice versa, if the tensioning force is too little, wire electrode 9 can be slack, put down pinch roller 6, pinch roller 6 can drive pinch roller swing arm 4 like this, use fixed rotation axis 5 of swing arm as the center, anticlockwise rotation, thereby drive the shading post 12 at the 4 back of pinch roller swing arm, cover lower spacing photoelectric sensor, lower spacing sensor 11 signals gives controller (PLC), the controller sends out the instruction and gives cylinder 3, cylinder pole 2 is flexible, it is upwards to stimulate pinch roller swing arm 4 through spring 8, increase take-up pulley 1 and give wire electrode 9 tensioning force, reach the purpose of automatically regulated tensioning force.

Claims

1. An automatic electrode wire tension adjusting device is characterized by comprising a tension wheel, a pressing wheel swing arm, a swing arm fixing rotating shaft, a fixing bottom plate, an upper limiting sensor, a lower limiting sensor, a spring, an air cylinder and a controller;

the device comprises a frame, a cylinder, a pressing wheel, a fixing base plate, a pressing wheel swing arm, a cylinder, a pressing wheel, a pressing base plate, an upper limiting sensor and a lower limiting sensor, wherein the cylinder is arranged on the frame;

2. The automatic electrode wire tension adjusting device according to claim 1, wherein the upper limit sensor and the lower limit sensor are mounted at positions corresponding to and matched with two shading columns on the rear side of the swing arm of the pinch roller respectively.

3. The automatic electrode wire tension adjusting device according to claim 1, wherein the upper limit sensor and the lower limit sensor are connected with the controller through control signal lines.

4. The automatic electrode wire tension adjusting device according to claim 1, wherein the upper limit sensor and the lower limit sensor are photoelectric sensors.

5. The automatic electrode wire tension adjusting device according to claim 1, wherein the controller is a PLC programmable controller.