CN214518024U - Energy-saving electric spark machine - Google Patents
Energy-saving electric spark machine Download PDFInfo
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- CN214518024U CN214518024U CN202120388429.8U CN202120388429U CN214518024U CN 214518024 U CN214518024 U CN 214518024U CN 202120388429 U CN202120388429 U CN 202120388429U CN 214518024 U CN214518024 U CN 214518024U
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Abstract
An energy-saving electric spark machine is composed of pulse power supply consisting of capacitor, high-frequency unit consisting of rectifier, high-frequency pulse circuit and step-down circuit, and control unit, rectifier circuit B, power module B and pulse generation and control circuit constitute, the output of control unit is connected with rectifier circuit A, rectifier circuit A all the way with high frequency pulse circuit, the step-down circuit, rectifier circuit B is connected in series in proper order, be connected with negative pole high frequency wire connector and anodal high frequency wire connector on the rectifier circuit B output, rectifier circuit A another way is connected with pulse generation and control circuit through power module B, pulse generation and control circuit output are connected on high frequency pulse circuit's output, pulse generation and control circuit input pass through the wire connection on the wire between step-down circuit and rectifier circuit B. The utility model discloses small, efficient precision is high, electric energy utilization is high, avoids climbing and trailing phenomenon.
Description
Technical Field
The utility model relates to a processing technology field, what specifically says so is an energy-saving electric spark machine.
Background
Most of traditional electric spark machining pulse power supplies adopt resistance current limiting type as shown in figure 1, so that voltage difference between direct current power supply voltage (80V) and spark gap maintaining voltage (20-25V) is completely applied to a current limiting resistor, the direct current power supply passes through the same current through the current limiting resistor and a machining gap, about 70% of electric energy of the direct current power supply is consumed on the current limiting resistor, and the electric energy utilization rate can only be about 30%. The heat of the current-limiting resistor makes the heat dissipation design of the direct current power supply stricter, which leads to further reduction of the energy efficiency of the power supply and increase of the volume of the power supply.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an energy-saving electric spark machine, small, efficient precision is high, electric energy utilization is high, avoids climbing and trailing phenomenon.
In order to realize the technical purpose, the adopted technical scheme is as follows: an energy-saving electric spark machine comprises a pulse power supply and a machine head for fixing an electrode, wherein a motor for driving the machine head to move up and down is arranged on the machine head, the pulse power supply comprises a capacitor, a high-frequency unit and a control unit, the capacitor is connected in parallel to the high-frequency unit, the high-frequency unit comprises a rectifying circuit A, a high-frequency pulse circuit, a voltage reduction circuit, a rectifying circuit B, a power supply module B and a pulse generation and control circuit, the output end of the control unit connected with a panel switch is connected with the rectifying circuit A, one output end of the rectifying circuit A is sequentially connected with the high-frequency pulse circuit, the voltage reduction circuit and the rectifying circuit B in series, the output end of the rectifying circuit B is connected with a negative high-frequency wire joint for connecting the electrode and a positive high-frequency wire joint for connecting a workpiece, the other output end of the rectifying circuit A is connected with the pulse generation and control circuit through the power supply module B, the output end of the pulse generating and controlling circuit is connected with the output end of the high-frequency pulse circuit, and the input end of the pulse generating and controlling circuit is connected with a lead between the voltage reducing circuit and the rectifying circuit B through a lead.
Pulse take place and control circuit put chip, full-bridge circuit and pulse transformer by the oscillation and the pulse width control chip of establishing ties in proper order and constitute, oscillation and pulse width control chip are connected with power module B, pulse transformer and high frequency pulse circuit connection.
Control unit and high frequency unit successive layer set up.
The control unit on be connected with and be used for placing two wires in clearance between electrode and work piece.
The utility model has the advantages that:
1. the electric spark machine is characterized in that the whole piece of the electric spark machine is designed in two parts, the machine head and the pulse power supply occupy small space, the electric spark machine and the pulse power supply can be connected in a span-separated mode, the electric spark machine is suitable for the environment with a small site, the pulse power supply is reasonably designed, an original switching power supply and a current limiting resistor are replaced by a high-frequency unit consisting of pulse circuits, the energy storage function from the time of processing clearance open circuit to the breakdown function during processing and the steady-state current processing function after breakdown can be met, the electric energy utilization rate of the whole circuit in actual processing without energy consumption elements reaches more than 80%, and the processing efficiency is improved by 30% compared with that of a conventional energy-saving pulse power supply.
2. Through adding the wire of connecting at the control unit between work piece and electrode, need not artifical the regulation, this spark machine can be according to gap voltage, carries out servo adjustment automatically, makes processing more meticulous accuracy, promotes machining efficiency.
Drawings
FIG. 1 is a schematic block diagram of the prior art;
FIG. 2 is a schematic block diagram of the present invention;
fig. 3 is a schematic block diagram of a control unit of the present invention;
fig. 4 is a schematic block diagram of the pulse generation and control circuit of the present invention.
Detailed Description
As shown in figure 2, an energy-saving electric spark machine, by pulse power supply, and be used for the aircraft nose of fixed electrode to constitute, be equipped with on the aircraft nose and be used for driving the aircraft nose motor that reciprocates, electrode detachable installs on the aircraft nose, be equipped with in the bottom of aircraft nose and be used for fixed work piece base, perhaps the work piece is placed in other position, correspond processing through removing the aircraft nose, the aircraft nose drives the electrode and reciprocates, produce when making electrode and work piece contact and discharge, realize electric spark machining with the electroerosion principle, can change the electrode as required, realize different size different shape processing. The pulse power supply and the handpiece are mutually independent, the pulse power supply is small in size, and the handpiece can be suitable for being used in parts with narrow space and small contact surfaces and is more convenient.
The pulse power supply comprises a capacitor, a high-frequency unit and a control unit, wherein the high-frequency unit provides discharge pulses, and the control unit is used for controlling the lifting of the machine head, the starting and stopping of the machine head and the on-off of the high-frequency unit and can be controlled through a panel switch. The capacitor is connected in parallel to the high-frequency unit, and in the automatic processing process, the energy storage and absorption capacity of the capacitor reduces the climbing and tailing phenomena of the pulse width, and the processing characteristics are improved.
The high-frequency unit consists of a rectifying circuit A, a high-frequency pulse circuit, a voltage reduction circuit, a rectifying circuit B, a power supply module B and a pulse generating and controlling circuit, the output end of the controlling unit connected with a panel switch is connected with the rectifying circuit A, one output end of the rectifying circuit A is sequentially connected with the high-frequency pulse circuit, the voltage reduction circuit and the rectifying circuit B in series, the output end of the rectifying circuit B is connected with a negative high-frequency wire connector used for connecting an electrode and a positive high-frequency wire connector used for connecting a workpiece, the two joints can be respectively connected with the workpiece and the electrode by utilizing high-frequency wires, the other output end of the rectifying circuit A is connected with a pulse generating and controlling circuit through a power supply module B, the pulse generating and controlling circuit is connected with a high-frequency pulse circuit, and the pulse generating and controlling circuit is connected with a lead between the high-frequency pulse circuit and the voltage reducing circuit through a lead.
After the initial voltage 220V is input into the control unit, the control unit is powered on, whether the 220V voltage is introduced into the high-frequency unit is controlled through the panel switch, the 220V voltage is input into the high-frequency unit, the 220V voltage is input into the rectifying circuit A and then is respectively output to the power supply module B and the high-frequency pulse circuit, the power supply module B outputs +/-24V to supply power for the pulse generation and control circuit, the pulse generation and control circuit generates a pulse signal, and the pulse signal is input into the high-frequency pulse circuit. The rectification circuit A converts alternating current 220v into direct current 308v through full-bridge rectification, supplies power to the high-frequency pulse circuit, the high-frequency pulse circuit receives a pulse signal, generates a high-frequency pulse signal, adjusts the direct current into XHz pulses, the high-frequency pulse signal is converted into 80v pulses through the voltage reduction circuit and the rectification circuit B, a negative high-frequency wire connected with the high-frequency unit is connected to the electrode, and a positive high-frequency wire connected with the high-frequency unit is connected to a workpiece. The machine head is controlled to descend through the panel switch, after the electrode contacts the workpiece, the positive electrode and the negative electrode of the high-frequency power supply start to strike sparks, and the contact position of the electrode and the workpiece starts to be machined.
When the spark machine works, the input end of the pulse generating and controlling circuit is connected to a lead between the high-frequency pulse circuit and the rectifying circuit B through a lead and is used for detecting the current between the workpiece and the electrode, if the detected current is small, the pulse generating and controlling circuit increases the pulse width, and if the detected current is large, the pulse generating and controlling circuit decreases the pulse width.
As shown in fig. 4, the pulse generating and controlling circuit is composed of an oscillation and pulse width controlling chip, an operational amplifier chip, a full bridge circuit and a pulse transformer which are connected in series in sequence, the oscillation and pulse width controlling chip is connected with the power module B, and the pulse transformer is connected with the high-frequency pulse circuit. The oscillation and pulse width control chip sends out rectangular waves, and high-power pulse signals are generated through the full-bridge circuit and the pulse transformer. The oscillation and pulse width control chip can adopt a PWM management chip.
The full-bridge circuit is composed of elements such as a universal switching tube, the switching time of the switching tube in the full-bridge circuit is controlled by the oscillation and pulse width control chip, the output current can be adjusted by changing the width of the pulse width, and the full-bridge circuit enables each processing period to have twice current release so that the system can generate larger processing current to meet wider processing range.
The control unit and the high-frequency unit are arranged layer by layer, so that the space can be saved, and the connection is more convenient.
As shown in fig. 3, the control unit includes a power module a, a single chip, a driving amplification chip, a relay module, and a motor driving module. The power module A converts the initial alternating current 220V into 12V, then converts the voltage into 5V voltage which can be used by a singlechip through a voltage stabilizing circuit, and drives a relay and a motor driving module through a driving amplification chip, wherein the relay module is a set of panel switches and is used for controlling on-off of various controllable circuits and equipment. The motor driving module comprises a driving chip and a motor chip, and can control the head motor to realize three states of ascending, descending and transient and stable states according to signals obtained by the single chip microcomputer.
In order to make the automation of the energy-saving electric spark machine higher, the control unit is connected with two leads used for being placed in a gap between an electrode and a workpiece, in the machining process, the two leads measure the voltage between the gap, the control unit can control a motor in a machine head to ascend or descend according to the size of the gap voltage, for example, when the average voltage of the gap is 20-25V when the average voltage of the machined iron sheet is perforated, the motor is kept in a temporary stable state, when the average voltage of the measured gap is lower than 20V, the control unit controls the electrode of the machine head to ascend to be in the gap with the workpiece, and when the voltage of the measured gap is higher than 25V, the control unit controls the electrode of the machine head to descend to enable the workpiece to be close to the electrode. The voltage signals of the two wires are connected to a driving chip of the control unit through circuit processing, and automatic adjustment is achieved through the motor driving module.
The details of the above are not described in the prior art.
Claims (4)
1. The utility model provides an energy-saving electric spark machine, by pulse power supply and be used for the aircraft nose of fixed electrode to constitute, be equipped with the motor that is used for driving the aircraft nose to reciprocate on the aircraft nose, its characterized in that: the pulse power supply comprises a capacitor, a high-frequency unit and a control unit, wherein the capacitor is connected in parallel with the high-frequency unit, the high-frequency unit comprises a rectifying circuit A, a high-frequency pulse circuit and a voltage reduction circuit, the output end of the control unit connected with the panel switch is connected with the rectification circuit A, one output end of the rectification circuit A is connected with the high-frequency pulse circuit, the voltage reduction circuit and the rectification circuit B are sequentially connected in series, a negative high-frequency wire connector used for connecting electrodes and a positive high-frequency wire connector used for connecting workpieces are connected to the output end of the rectification circuit B, the other output end of the rectification circuit A is connected with the pulse generation and control circuit through the power module B, the output end of the pulse generation and control circuit is connected to the output end of the high-frequency pulse circuit, and the input end of the pulse generation and control circuit is connected to a lead between the voltage reduction circuit and the rectification circuit B through a lead.
2. An energy efficient electric discharge machine as claimed in claim 1, characterized in that: the pulse generating and controlling circuit consists of an oscillation and pulse width controlling chip, an operational amplifier chip, a full-bridge circuit and a pulse transformer which are sequentially connected in series, wherein the oscillation and pulse width controlling chip is connected with the power module B, and the pulse transformer is connected with the high-frequency pulse circuit.
3. An energy efficient electric discharge machine as claimed in claim 1, characterized in that: the control unit and the high-frequency unit are arranged layer by layer.
4. An energy efficient electric discharge machine as claimed in claim 1, characterized in that: the control unit is connected with two leads used for placing a gap between the electrode and the workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120388429.8U CN214518024U (en) | 2021-02-22 | 2021-02-22 | Energy-saving electric spark machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120388429.8U CN214518024U (en) | 2021-02-22 | 2021-02-22 | Energy-saving electric spark machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214518024U true CN214518024U (en) | 2021-10-29 |
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ID=78235784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120388429.8U Active CN214518024U (en) | 2021-02-22 | 2021-02-22 | Energy-saving electric spark machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214518024U (en) |
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2021
- 2021-02-22 CN CN202120388429.8U patent/CN214518024U/en active Active
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