KR101862011B1 - Collision prevention apparatus and method for machine's moving member - Google Patents

Abstract

The present invention discloses an apparatus and method for preventing collision of a conveying member for a machine tool. The apparatus for preventing collision of a feeder for a machine tool includes a mechanical hydraulic pressure section 12 having a hydraulic circuit for moving the injection bars 11a and 11b provided on the transfer body back and forth and the injection bars 11a and 11b A conveyance body engaging portion 10 including a sensing sensor 13 for sensing whether or not it is coupled to the tool rest 70; An operation unit 20 for user input; A motor (30) connected to the tool rest (70) and providing a driving force for movement of the tool rest (70); A drive (40) providing a signal for driving the motor (30); And a control unit (60) for controlling the conveying unit coupling unit (10), the operation unit (20) and the drive (40), and the controller (60) And controls a target position of the conveying member based on a current position of the conveying member stored in advance so as to prevent the conveying member from colliding with the adjacent conveying member.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collision prevention apparatus and method for a machine tool,

The present invention relates to an apparatus and method for preventing collision of a conveying member for a machine tool, and more particularly, to an apparatus and method for preventing collision of a conveying member for a machine tool, , It is possible to eliminate the speed limit of the conveying body against the collision, and to control the collision of the conveying body for the machine tool, which can predictably control the collision, can be used overlapping with the existing method, Device and method thereof.

Among various machine tools, a conveyor such as a tailstock, a spindle and a sub-spindle is applied for a horizontal lathe.

Particularly, since the conveying members of the tailstock, the spur gear and the sub spindle use the lower conveying surface of the horizontal lathe in common, there is always a risk of mutual collision when these conveying members are conveyed.

Therefore, there is a need for a means for preventing collision of the conveyer for machine tools, which is applied in various forms.

At present, there are many ways to reduce the impact of mechanical collision or to reduce the impact by simply sensing the collision with a sensor. However, this method is not preventable and is a post-measure.

This will be discussed in more detail.

First, it is a mechanical impact compensator, which relieves only impacts on collision, and relies on the user's eyes.

In the case of such a mechanical impact compensating device, the collision compensation is not performed when the mechanical impact range is larger than the predetermined design distance.

Second, it is a device for sensing by a sensor after a collision, and detecting the collision after collision, thereby confirming the axis transfer and warning.

However, in the case of a sensing device using such a post collision sensor, there is a problem that the sensor is damaged when a high-speed collision occurs.

Third, the sensor measures the distance between the transported objects. In this case, the cost of the sensor is high, and additional mechanical structures are required. In particular, it has the drawback that it becomes difficult to detect when a sensor fails.

Therefore, there is a need for an alternative to the anti-collision device of the feed structure for the machine tool which has an improved structure in consideration of these matters as a whole.

Korean Utility Model Application No. 20-1998-0028748

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a hardware device which can be easily implemented by adding a software device to an existing hardware device, A collision avoidance device for a conveying body for a machine tool capable of eliminating a speed limit of a conveying body in comparison with a conveying body and capable of predictive control of a collision, And to provide such a method.

In order to achieve the above-mentioned object, the present invention is characterized in that the present invention includes a feed mechanism including a mechanical hydraulic portion having a hydraulic circuit for moving the injection bar provided in the transfer member back and forth, and a detection sensor for detecting whether the injection bar is coupled to the tool bar Body coupling portion; An operation unit for inputting the user; A motor coupled to the tool base and providing a driving force for movement of the tool base; A drive for providing a signal for driving the motor; And a control unit for controlling the conveying unit coupling unit, the operation unit, and the drive, wherein the control unit controls the conveying unit, the operation unit, and the drive so that the conveying unit is prevented from colliding with the adjacent conveying unit when the conveying unit is moved to the target position And controls the target position of the conveyance body based on the stored current position of the conveyance body.

The present invention further provides the following specific embodiments with respect to the above embodiment of the present invention.

According to an embodiment of the present invention, the apparatus may further include a comparator that compares the current position and the target position of the conveying member with the interference position of the conveying member, and transmits the compared value to the control unit.

According to an embodiment of the present invention, the control unit transmits an instruction from the operation unit to the mechanical hydraulic unit, the comparator and the drive, and generates an alarm with a result of the comparator, So as to stop the vehicle.

According to another aspect of the present invention, there is provided a method of processing a plurality of objects, the method comprising: proceeding with a preceding flow of individually checking and storing current positions of a plurality of objects; And a control unit for controlling a normal flow to control any one of the conveying members to which an instruction is given based on a current position and a target position of the conveying members stored in advance so that the conveying members do not collide with each other, Wherein the step of advancing the normal flow comprises the steps of: issuing a feed command to one of the feeders; A step of clamping a bar coupling of a tool bar for transferring the injection bar of the transfer body and the corresponding transfer body for transferring the transfer body to which the command is issued; Determining whether the corresponding conveying body has reached a target position in the course of feeding the corresponding conveying body by the tool rest; Determining whether the corresponding conveying member has reached an interference area; And stopping the power source for conveying the conveyance body or generating an alarm when the conveyance body reaches the interference area. The present invention also provides a method of preventing collision of a conveyance body for a machine tool.

According to the present invention, it is possible to easily implement the present invention by adding a software device to an existing hardware device, as well as effectively prevent a collision between the transported objects, to eliminate the speed limit of the transported object in preparation for collision, Predictive control is possible, it can be used in duplication with the existing method, and the range of the interference region can be expressed in a fluid manner.

1 to 6 are conceptual diagrams for explaining an apparatus for preventing collision of a conveying member for a machine tool according to an embodiment of the present invention.
7 is a control block diagram of an anti-collision apparatus for a transfer tool for a machine tool according to an embodiment of the present invention.
FIG. 8 is a flowchart of a method of preventing collision of a conveying member for a machine tool according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 to 6 are conceptual diagrams for explaining a collision avoidance apparatus for a transfer tool for a machine tool according to an embodiment of the present invention, and FIG. 7 is a cross-sectional view of a collision avoidance apparatus for a machine tool according to an embodiment of the present invention. Fig.

Referring to these figures, the apparatus for preventing collision of a conveying member for a machine tool according to a preferred embodiment of the present invention includes a conveying body coupling unit 10, an operation unit 20, a motor 30, a drive 40, 60).

The transfer body coupling portion 10 includes a mechanical hydraulic pressure portion 12 having a hydraulic circuit for moving injection bubbles 11a and 11b provided on the transfer body back and forth, And a sensing sensor (13) for sensing whether or not it is coupled to the base (70).

In the case of Figs. 1 and 2, since the dust proof mouth is transferred by the tool rest 70, the dust proof spout becomes the transfer body at this time. In the case of Figs. 3 and 4, The pressure-sensitive bar becomes a conveying body.

As shown in Figs. 1 to 4, injection bars 11a and 11b are respectively provided in the dustproof box and the tailstock as conveying bodies. Although not shown in detail, the injection bars 11a and 11b may be operated on the mechanical hydraulic pressure section 12, that is, protruded to be coupled to the bar coupling section 71 of the tool rest 70. [

The operation portion 20 is an input portion of the user. The operation unit 20 can be an MDI panel and a screen, and can be divided into an input method using a manual button or an input method using an automatic mode.

The motor 30 is connected to the tool rest 70 and provides a driving force for transferring the tool rest 70. [ In a preferred embodiment of the present invention, the motor 30 may be a general motor or a servo motor. In the case of the servo motor, since the distance control is possible, it is not necessary to follow the flow of this embodiment.

The drive (40) is instructed to be conveyed by the controller (60) and generates a signal for driving the motor (30).

The apparatus for preventing collision of a conveying member for a machine tool according to another preferred embodiment of the present invention further comprises a comparator (50). The comparator 50 compares the current position and the target position of the conveying member with the interference position of the conveying member, and transmits the compared value to the control unit 60.

The control unit 60 serves to control the conveying member coupling unit 10, the operation unit 20, the comparator 50, and the drive 40. [

That is, in this embodiment, when the conveying body is moved to the target position by the driving of the motor 30, the controller 60 controls the current position of the conveying body previously stored so as to prevent the conveying body from colliding with the adjacent conveying body And the target position of the conveying body is controlled based on this.

The control unit 60 transmits a command from the operating unit 20 to the mechanical hydraulic pressure unit 12, the comparator 50 and the drive 40, And controls to generate an alarm or stop the operation of the motor 30 with the result.

This will be described in detail with reference to FIG. 1 and FIG. As described above, the conveying member in Fig. 1 and Fig. 2 is a dust-proofing member, and the pressure-receiving member is a fixing member at a position spaced apart from the same axis.

First, the current position of the anti-vibration plate and the pressure-sensitive zone is checked and stored. That is, when the tool rest 70 is moved to the anti-vibration mouth so that the injection bar 11a of the anti-dust mouth is coupled to the bar joining portion 71 of the tool rest 70, the position may be the current position of the anti-

Likewise, when the tool rest 70 is moved to the pressure point so that the injection bar 11b of the pressure restraining bar is engaged with the bar fitting portion 71 of the tool rest 70, the position may be the current position of the pressure restraining bar. The current position of the shock absorber and the pressure-sensitive bar is stored in advance. For example, in FIG. 1, the current position of the dust-tightening zone is Z200, and the current position of the pressure-sensitive zone is Z500.

In this state, the current position of the anti-vibration barrel and the pressure-sensitive bar is preliminarily stored, and an instruction is issued to move the anti-vibration barrel of the transfer chain, for example, to the target position of the Z400 through the operation unit 20. [

2, the tool rest 70 is moved to the anti-vibration mouth so that the injection bar 11a of the anti-dust mouth is engaged with the bar engagement portion 71 of the tool rest 70. In this state, .

At this time, since the present position of the pressure-sensitive bands is stored in advance as Z500, it can be moved quickly without any interference or collision when moving the discharge port to the position of Z400. If an instruction is issued to move the discharge chain of the transfer chain through the operation unit 20 to the target position of the Z500, for example, the interference region with the tail pad is expected, so that the control unit 60 determines that the break- The motor 30 which drives the tool rest 70 can be stopped or an alarm can be generated. After that, it is possible to move out of the interference area by only the handle mode (HANDLE MODE).

This operation can be equally applied to conveying the tail pad in Figs. 3 and 4. Fig.

As a result, for the application of the present invention, a preceding flow for checking and storing the current position of the conveying body disposed on the machine tool must be performed in advance. The preceding flow is described above.

On the other hand, the number of preceding flows may vary from equipment to equipment. For example, three forward flows are required for equipment with two outriggers and one retractor, and one forward flow is required for equipment with one servo boom and one retractor. This is because the vibration springs are operated as servo motors.

In the case of a machine with two spindles and one subspindle (servo driven), two preceding flows are required, and one machine has one spindle and one subspindle (driven by a tool). Two preceding flows are required.

On the other hand, the method and calculation for setting the interference region (or interference position) can be proceeded as follows. The following matters are merely examples, and the scope of the present invention is not limited to these matters.

The sum of the distance A in FIG. 5 (a) and the distance B in FIG. 5 (b) is the minimum distance of collision. Therefore, the range of the interference position (or interference region) can be set under the following conditions. The interference region can be changed flexibly according to the A value and the B value.

Example (1). In this case, the earth guard is moved to the tool rest 70 for transfer.

The interference conditions at this time are as follows.

A + B + Clearance <Zts - Current position of Z axis

(Zts: current position of the pressure regulator)

Example (2). In this case, the cardiopulmonary bearing is transferred to the tool rest 70 by being moved.

The interference conditions at this time are as follows.

A + B + allowable distance <Z axis current position - Zsr

(Zsr: current location of the earth)

Example (3). In this case, a servo type shock absorber is applied.

The interference conditions at this time are as follows.

Transferring the ballast: A + B + Clearance <Zts - Current position of B axis

Trimmed belt feed: A + B + clearance <Z-axis current position - B-axis current position

Example (4). In this case, a servo-type tailstock is applied.

The interference conditions at this time are as follows.

Distance to earth moving: A + B + Clearance <B axis current position - Z axis current position

Trimmed belt feed: A + B + clearance <B axis current position - Zsr

On the other hand, in the case of applying two vibration proofs and one retractor, it can be arranged as shown in FIG.

At this time, the discharge point 1 transfer: A + C + clearance distance <Zsr2 - Z axis current position

Current position of Z axis - Current position of Z axis - Zsr1 and A + B + allowable distance <Zts - Current position of Z axis

Strand transport: A + B + clearance <Z-axis current position - Zsr2

FIG. 8 is a flowchart of a method of preventing collision of a conveying member for a machine tool according to an embodiment of the present invention.

As described above, according to the present invention, there is provided a method for preventing collision of a conveying member for a machine tool, comprising the steps of: proceeding with a preceding flow of individually checking and storing current positions of a plurality of conveying members; And controlling the movement of any one of the conveying members to which the command is issued based on the current position and the target position of the conveying members stored in advance so as not to be collided with the conveying members.

First, a step of proceeding with a preceding flow for individually checking and storing the current positions of a plurality of conveying members will be described with reference to FIGS. 1, 2, and 8. FIG.

The preceding flow starts (S11). That is, the tool bar 70 is moved to the transmission chain anti-vibration member in a state where the injection bar 11a and the bar coupling portion 71 of the tool bar 70 are clamped to each other (S12) (S13).

When the tool rest 70 reaches the final reached position (S14), the injection bar 11a and the bar joining portions 71 of the tool rest 70 are unclamped mutually (S15). However, if the tool rest 70 can not reach the final reached position, it continues to work until it is reached.

Then, the coupled state and the unclamped state are checked through the detection sensor 13 (S16). When the confirmation is made, the coordinates at that time, that is, the Z axis coordinates are stored (S17) (S18). In the same manner, the coordinates of the current position of the trapezoid bar in Figs. 1 and 2 are checked and stored.

If the signal is not confirmed by the detection sensor 13, an alarm is generated (S19), then released after a predetermined time (S20), and then fed back to the step S15.

On the other hand, assuming that the above-mentioned preceding flow has proceeded, the normal flow starts (S21).

In other words, in FIG. 1 and FIG. 2, after storing the current position coordinates of the anti-vibration barrel and the pressure-sensitive bar in advance through the preceding flow, the normal flow of how to move the anti-vibration barrel is proceeded.

And a feed command of the conveying body is generated (S22). Then, in a state in which the injection bar 11a and the bar coupling portion 71 of the tool rest 70 are clamped to each other (S23), the tool rest 70 reaches the target position of the transfer chain stop (S24 ). If the target position has been reached, the process proceeds to step S15.

If the tool rest 70 has reached the target position, the tool rest 70 is terminated. If the tool rest 70 has not reached the target position, it is checked whether the tool rest 70 has reached the interference area (S25). This is possible because the coordinates of the current position of the traction sheave are stored in advance.

As a result of the determination, when the interference area is reached, the operation of the motor 30 is stopped and an alarm is generated (S26). Thereafter, it is necessary to move out of the interference area. In this case, the operation can be proceeded to a handle mode (S27). Thereafter, it is possible to continue the determination as to whether or not the interference area is out of the range (S28).

According to the present invention having such a structure and method, the following effects can be provided.

First, it can be easily implemented by adding a software device to an existing hardware device.

Secondly, it is possible to effectively prevent collision between the conveying members.

Third, the speed limit of the conveyance body against the collision can be eliminated.

Fourth, predictive control of collision becomes possible.

Fifth, the collision avoidance apparatus can be configured in a duplex manner by using the method in duplication with the existing method. In other words, it is possible to use the shock type mechanical sensing device redundantly.

Sixth, the range of the interference region can be expressed in a fluid manner. For example, in the case of using various kinds of sizes of the discharge ports, it is only necessary to change the parameter values according to the size of the discharge ports.

Seventh, there is no fear of failure because the distance between the conveying members is not a sensor. Even if a malfunction occurs at the coupling portion between the dust-proof mouth and the tool rest 70, there is no possibility of interference because the transfer itself is impossible.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

10: conveying member engaging portions 11a, 11b: injection bar
12: Mechanical hydraulic section 13: Sensing sensor
20: Operation section 30: Motor
40: drive 50: comparator
60: control unit 70: tool stand

Claims (4)

A mechanical hydraulic pressure section 12 provided with hydraulic circuits for causing the injection bars 11a and 11b provided respectively in the plurality of transfer members to move forward and backward and a mechanism for determining whether the injection bars 11a and 11b are coupled to the tool rest 70 A conveyance body engaging portion 10 including a sensing sensor 13 for sensing an object to be inspected;
An operation unit 20 for user input;
A motor (30) connected to the tool rest (70) and providing a driving force for movement of the tool rest (70);
A drive (40) providing a signal for driving the motor (30); And
And a control unit (60) for controlling the carrier assembly (10), the operation unit (20), and the drive (40)
The control unit 60 proceeds to a preceding flow for individually checking and storing the current positions of the plurality of conveying members, and when one of the plurality of conveying members is moved to the target position, Controls one of the plurality of conveying members to which the command is given based on the current position and the target position of the plurality of conveying members stored in advance so as to prevent the collision with the body,
Wherein said normal flow is a step of lowering a feed command to one of said plurality of feeders and feeding said injection bar (11a, 11b) of said feeder to said feeder Clamps the bar coupling part of the tool rest 70 for transferring the target object to the tool rest 70, and judges whether or not the corresponding transfer body has reached the target position in the process of transferring the corresponding transfer object by the tool rest 70, Wherein the controller is configured to determine whether the conveying body has reached the interference area and stop the motor for conveying the conveying body or generate an alarm when the conveying body reaches the interference area. And the collision prevention device for the transfer member.
The method according to claim 1,
Further comprising a comparator (50) for comparing the current position and the target position of the conveying member with the interference position of the conveying member and transmitting the compared value to the control unit (60) Crash prevention device.
3. The method of claim 2,
The control unit (60)
A command from the operating unit 20 is transmitted to the mechanical hydraulic pressure unit 12, the comparator 50 and the drive 40,
And an alarm is generated with a result of the comparator (50), or the operation of the motor (30) is stopped.
Proceeding with a preceding flow of individually checking and storing the current position of a plurality of conveying members; And
The controller controls a normal flow so as to control any one of the interfering positions to which the feeders are commanded based on the current position and the target position of the feeders stored in advance so that the feeders do not collide with each other at the time of feeding the feeders ; &Lt; / RTI &gt;
In the normal flow proceeding step,
A step of feeding a feed command to one of the feeders;
A step of clamping a bar coupling of a tool bar for transferring the injection bar of the transfer body and the corresponding transfer body for transferring the transfer body to which the command is issued;
Determining whether the corresponding conveying body has reached a target position in the course of feeding the corresponding conveying body by the tool rest;
Determining whether the corresponding conveying member has reached an interference area; And
And stopping the power source for feeding the conveyance body or generating an alarm when the conveyance body reaches the interference area.

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