KR100214452B1 - Chip conveyor driving device - Google Patents

Abstract

The present invention relates to a chip conveyor driving device that prevents shortening of the life of a motor and minimizes power consumption. The chip conveyor is a chip conveyor for transporting chips generated by workpiece processing. In the chip conveyor driving apparatus of a machine tool having a motor for driving a workpiece, and a magnetic switch for switching the power supply connected in series to the three-phase power supply stage and performing the workpiece machining according to at least one machining cycle, at least one machining cycle A counter for outputting a predetermined signal, a motor driver for operating the motor for a set time according to the output signal of the counter, and a timer for setting the set time. It can be configured to maximize the operating efficiency of the chip conveyor.

Description

Chip Conveyor Drive

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool, and more particularly, to a chip conveyor for conveying a cutting powder, ie, a chip, discharged as a machine tool such as a lathe cuts a workpiece.

In general, a machine tool such as a lathe performs cutting and the like in order to process a workpiece in a predetermined shape, so that chips are discharged, which are accumulated around the machine tool. Overly accumulating chips can adversely affect the machining of workpieces. Therefore, a chip conveyor for collecting and conveying the chips discharged during the workpiece processing so as not to be accumulated excessively is installed.

As shown in FIG. 1, the chip conveyor driving apparatus according to the related art receives an AC power through a switch (SW ₁ ) and a three-phase power stage for maintaining an operation cycle of the chip conveyor in an 'on' state. Motor (M) for driving a conveyor, a magnetic switch (MS) connected in series with the power stage of the three phases to switch AC power supply, when the AC power supplied to the motor (M) is in an overcurrent state is the motor The thermal contact (TH ₁ ) to cut off the power supply to (M), the magnetic switch excitation coil (MC ₁ ) for switching the magnetic switch (MS), the relay a contact to operate in conjunction with the magnetic switch excitation coil (MC ₁ ) MC _1a and relay b contact MC _1b , first and second timer excitation coils T ₁ and T2 for setting an operating time and a stopping time of the motor M, respectively, and the first and second parts. 2 In conjunction with timer excitation coil (T ₁ ) (T2) Is for displaying the operating states of the first and second timer relays (TRY ₁ ) (TRY ₂ ), relay excitation coil (MRY ₁ ), relay a contact (RY _1a ), relay b contact (RY _1b ), and chip conveyor. It comprises a lamp (L ₁ , L2).

Looking at the operation of the chip conveyor driving apparatus according to the prior art configured as described above are as follows.

First, when the user 'turns on' the switch SW ₁ , the magnetic switch exciting coil MC ₁ and the first timer exciting coil T ₁ are energized by being supplied with the operating power through the relay b contact RY _1b . Subsequently, since the magnetic switch MS, which is associated with this operation, is 'on', the motor M receives a three-phase AC power to operate the chip conveyor. At the same time, since the relay a contact MC _1a , which operates in conjunction with the magnetic switch exciting coil MC ₁ , is 'on', an operation state display lamp L ₂ is turned on to indicate that the chip conveyor is in operation.

Since the first timer excitation coil T ₁ is excited, the first timer relay TRY ₁ is 'on' after a predetermined time and the second timer relay TRY ₂ is 'on' because of its operation characteristic. The timer excitation coil T ₂ and the relay excitation coil MRY ₁ are excited by the operation power source. Therefore, the relay b contact point (RY _1b ), which operates in conjunction with the relay excitation coil (MRY ₁ ), is 'off', so that the magnetic switch excitation coil (MC ₁ ) is not supplied with operating power, so the magnetic switch (MS) which operates in connection with the relay excitation coil (MRY ₁ ) is not supplied. 'Off' the motor (M) stops operation. At the same time, the operation state display lamp L ₂ is turned off and the stop state display lamp L ₁ is turned on to indicate that the chip conveyor is in a stopped state.

Subsequently, the second timer excitation coil T ₂ is 'on' after the set time and the second timer relay TRY ₂ , which is associated with the second timer excitation coil T ₂ , is 'off' due to its operation characteristics. Due to this, the relay excitation coil MRY ₁ is not supplied with power, and thus the relay b contact RY _1b , which is linked with the relay excitation coil MRY ₁ , is 'on' again so that the magnetic switch excitation coil MC ₁ and the first timer excitation coil T _{1 are used.} This is powered and excited. Therefore, since the magnetic switch (MS) is 'on', the motor (M) operates to drive the chip conveyor.

As described above, the chip conveyor driving apparatus according to the related art drives the chip conveyor to repeat the operation and stop states according to each timer setting time while the switch SW ₁ maintains the 'on' state.

The chip conveyor driving apparatus according to the related art repeats the operation and the stop regardless of the amount of the chip load, thereby shortening the life of the motor driving the same and increasing power consumption.

Accordingly, an object of the present invention is to provide a chip conveyor driving device capable of preventing the shortening of a motor life and minimizing power consumption.

1 is a sequence diagram showing a chip conveyor driving apparatus according to the prior art,

2 is a sequence diagram showing a chip conveyor driving apparatus according to the present invention,

3 is a timing diagram showing an operation state of each part of the chip conveyor driving apparatus according to the present invention.

Explanation of symbols for the main parts of the drawings

M: Motor TH ₁ : Thermal Contact

MS: Magnetic switch SW ₁ : Switch

MC ₁ : Magnetic switch excitation coil L ₁ , L ₂ : Lamp

T ₁ , T ₂ , T ₃ : 1st to 3rd timer excitation coil

TRY _1, TRY ₂ , TRY ₃ : First to Third Timer Relays

RY _1a , RY _2a , RY _3a , RY _4a , RY _5a , RY _6a , RY _7a , RY _8a , MC _1a : Relay a contact

RY _1b , MC _1b : Relay b contact 11: Counter

The present invention is a chip conveyor for transporting a chip generated by the workpiece processing, a motor receiving the AC power through the three-phase power stage to drive the chip conveyor, the magnetic connection is connected in series to the three-phase power stage magnetic switch In a chip conveyor driving apparatus for a machine tool having a switch and performing a workpiece machining in accordance with at least one machining cycle, a number of times that one or more machining cycles are finished is counted, and a constant signal is output when the value is equal to a set value. And a counter for driving the motor for a set time according to the output signal of the counter, and a timer for setting the set time.

Hereinafter, a chip conveyor driving apparatus according to the present invention will be described with reference to the accompanying drawings.

2 is a sequence diagram showing a chip conveyor driving apparatus according to the present invention, Figure 3 is a timing diagram showing the operating state of each part of the chip conveyor driving apparatus according to the present invention.

Before explaining the chip conveyor driving apparatus of the present invention, the internal sequence of the machine tool in which the chip conveyor is used is a machining cycle for machining the workpiece once and maintaining the position, and finishing the machining cycle once and returning to the original position. There are several types of workpiece machining cycles, such as machining cycles which are terminated afterwards and machining cycles in which the workpiece machining is repeatedly repeated several times.

As shown in FIG. 2, the chip conveyor driving device according to the present invention includes a plurality of relay a contacts (RY _2a , RY _3a , and RY _4a ) connected in parallel and 'on' according to each processing cycle completion signal. When any one of the plurality of relay contacts a (RY _2a , RY _3a , RY _4a ) connected in parallel is turned on, the relay exciting coil MRY ₅ is energized and the relay exciting coil MRY ₅ is energized. The counter 11 and the counter 11 that count the number of times the machining cycle is completed according to the 'on' and 'off' of the relay a contact RY _{5a that} operates in conjunction and outputs a constant signal when the counting value is equal to the set value. Magnetic switch (MS) for switching the AC power supply through the three-phase power terminal in accordance with the output signal of the), the motor (M) for driving the chip conveyor by receiving the three-phase AC power in accordance with the switching operation of the magnetic switch (MS) ), The three phase AC power supply is Current state, if "off" is the thermal contact (TH ₁₎ to cut off the power supply to the motor (M), the magnetic switch excitation coil (MC ₁₎ for switching the magnetic switch (MS), setting time, that is, a motor ( A third timer excitation coil T ₃ and a third timer relay TRY ₃ for setting an operation time of M), and a plurality of relay excitation coils MRY ₆ , MRY ₇ , and MRY operating in association with the respective components. ₈ ) and the relay a contact (RY _6a, RY _7a, RY _8a ).

The operation of the chip conveyor driving device configured as described above is as follows.

First, as shown in _FIGS . _3A and _3B , when any one of the relay a contacts RY _2a , RY _3a , and RY _4a 'on' is turned on by the processing cycle termination signal, it is associated with this. The operating relay exciting coil MRY ₅ is excited by the operating power source. Subsequently, the relay a contact RY _5a , which operates in conjunction with the relay excitation coil MRY ₅ , is 'on', so as shown in FIG. 3C, the counter 11 recognizes that the machining cycle has been completed once and counts a value. Increases by 1. When the workpiece machining continues and a machining cycle termination signal is generated accordingly, when the counting value of the counter 11 becomes a set value, that is, 5, a predetermined signal is output to apply the operating power to the relay exciting coil MRY ₆ . The relay excitation coil (MRY ₆ ) is temporarily excited.

At this time, if a certain amount of chips are discharged each time the machining cycle is progressed and five or more machining cycles are processed based on the machining cycle in which the most chips are discharged, chips may be accumulated too much and flow down the chip conveyor. Can be. Therefore, when the machining cycle is completed five times, the counter stores 5 as a set value.

Subsequently, as shown in FIG. 3D, the third timer excitation coil T ₃ and the relay are connected by a linking operation leading from the relay a contact RY _{6a to the} relay excitation coil MRY _{7 to the} relay a contact RY _7a . The excitation coil (MRY ₈ ) receives the operating power.

At this time, the relay exciting coil MRY ₇ is temporarily excited by the linking operation leading to the counter 11 → relay exciting coil MRY ₆ → relay a contact RY _6a , and then relay a contacting point ( RY _7a ) and the third timer relay TRY ₃ are self-holding.

Since the relay excitation coil MRY ₈ is excited, the relay a contact RY _8a is 'on' and the magnetic switch excitation coil MC ₁ is excited, so the magnetic switch MS is turned on and the three-phase AC power supply is excited. Is supplied to the motor M, and the motor M operates as shown in FIG. Therefore, the chip conveyor is driven to carry the chip.

On the other hand, the third timer excitation coil T ₃ is applied with the operating power, and as shown in FIG. 3E, after the set time, that is, 15 seconds, is excited, and accordingly, the third timer relay TRY ₃ has a ''Off', the operation power supply to the relay exciting coil (MRY ₇ ) is stopped. Subsequently, the relay a contact RY _7a operating in conjunction with this is 'off' and the supply of operating power to the relay exciting coil MRY ₈ and the third timer exciting coil T ₃ is cut off. Therefore, the relay a contact point RY _8a operating in conjunction with the relay excitation coil MRY ₈ is 'off', and thus, the supply of operating power to the magnetic switch excitation coil MC ₁ is cut off, and the magnetic switch MS is 'off'. As shown in FIG. 3F, the motor M stops operating.

When the machining cycle is finished 5 times and the counter 11 counts this and outputs a constant signal, the motor operates for 15 seconds by the interlocking operation of various relay excitation coils, relay contacts, timer excitation coils, and timer relays. Drive and stop.

As described above, the chip conveyor driving apparatus of the present invention counts the end times of the machining cycles by using the internal sequence signal indicating the end of the machining cycles, and reaches the end of the cycles set in proportion to the chip generation amount. It is driven to transport the accumulated chips on the chip conveyor.

Since the chip conveyor driving device according to the present invention carries the chip by driving the chip conveyor at the end of a predetermined cycle of processing, the chip conveyor and the driving time of the motor according to the related art are drastically reduced and the power consumption is also reduced compared to the conventional technology. There is an effect to maximize the operation efficiency.

Claims (5)

Chip conveyor for transporting chips generated by workpiece processing, motor for receiving AC power through three-phase power stage and driving the chip conveyor, magnetic switch connected in series with the three-phase power stage and switching power supply In the chip conveyor driving apparatus of the machine tool having a workpiece processing according to at least one machining cycle A counter unit for counting the number of times the one or more processing cycles ends and outputting a predetermined signal when the value is equal to a set value; A motor driving unit operating the motor for a predetermined time according to the output signal of the counter unit; Chip conveyor driving device characterized in that it comprises a timer for setting the set time. The method of claim 1, The counter unit includes a plurality of relay a contacts connected in parallel to each other and operating according to the one or more processing cycle termination signals. A first relay exciting coil coil excited according to the operation of the plurality of relay contacts a connected in parallel; A first relay a contact cooperating with the first relay excitation coil; And a counter for counting the number of times the processing cycle ends according to the operation of the first relay a contact. The method of claim 1, The motor driving unit and the second to fourth relay to sequentially operate in accordance with the output signal of the counter; And a magnetic switch exciting coil configured to operate in conjunction with the fourth relay to turn on or off the magnetic switch. The method of claim 1, The set value is 3 to 7 times and the chip conveyor drive device characterized in that the variable setting according to the contents of the processing cycle. The method of claim 1, The set time is a chip conveyor driving device, characterized in that 10 to 20 seconds.

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