KR102550674B1 - Apparatus And Method for Adjustment And Transfer of Workpiece on Machine Tool - Google Patents

Abstract

The present invention relates to an apparatus and method for positioning and transferring a workpiece of a machine tool, which can improve processing accuracy by accurately detecting and adjusting the position of a flange of a workpiece in a machine tool and then transferring the workpiece to a chuck. A workpiece position adjustment and transfer device of a machine tool according to one form of, a fixed frame which is installed to be fixed to one side of the chuck of the machine tool; A transfer frame movably installed on the fixed frame and moving to a position close to or away from the chuck of the machine tool; a driving unit for horizontally transporting the transfer frame with respect to the fixed frame; A position including a rotation member installed to rotate about one axis on the transfer frame, a holder installed on one end of the rotation member to releasably fix the workpiece, and a rotation drive unit that transmits rotational force to the rotation member. coordination department; a sensor mount member fixedly installed to the transfer frame; a position detection sensor installed on the sensor mount member to detect a position of a flange of the workpiece fixed to the holder; and a controller configured to adjust the direction of the workpiece by operating the rotary driving unit according to information on the flange position of the workpiece detected by the position detection sensor.

Description

Apparatus And Method for Adjustment And Transfer of Workpiece on Machine Tool}

The present invention relates to a machine tool, and more particularly, to an apparatus and method for positioning and transferring a workpiece of a machine tool, which detects and adjusts a flange position of a workpiece in the machine tool and then transfers the workpiece to a chuck.

In general, a grinding machine includes a chuck for holding a workpiece and a grinding wheel for grinding the workpiece, and transfers the workpiece to the chuck for holding the workpiece before machining.

However, if there is an abnormality in the workpiece before grinding, a fatal defect may occur in the grinding machine. It affects the surface roughness and performance of the product, resulting in a problem of lowering the competitiveness of the product.

In particular, in the case of grinding a workpiece having a plurality of corners formed on the flange, alignment of the workpiece is very important.

However, conventional machine tools, such as grinding machines, check whether or not there is an abnormality in a workpiece before machining, but cannot accurately align the direction of a workpiece to be fixed to a chuck. This becomes a factor that minutely degrades the performance of the machine tool and degrades the processing quality.

Republic of Korea Utility Model Registration No. 20-0227467 Republic of Korea Patent No. 10-1135270

The present invention is to solve the above problems, and an object of the present invention is to accurately detect and adjust the flange position of a workpiece in a machine tool, and then transfer the workpiece to a chuck, thereby improving machining accuracy. It is to provide a workpiece position adjustment and transfer device and method.

An apparatus for positioning and transporting a workpiece of a machine tool according to one aspect of the present invention for achieving the above object includes a fixed frame fixed to one side of a chuck of the machine tool; A transfer frame movably installed on the fixed frame and moving to a position close to or away from the chuck of the machine tool; a driving unit for horizontally transporting the transfer frame with respect to the fixed frame; A position including a rotation member installed to rotate about one axis on the transfer frame, a holder installed on one end of the rotation member to releasably fix the workpiece, and a rotation drive unit that transmits rotational force to the rotation member. coordination department; a sensor mount member fixedly installed to the transfer frame; a position detection sensor installed on the sensor mount member to detect a position of a flange of the workpiece fixed to the holder; and a controller configured to adjust the direction of the workpiece by operating the rotary driving unit according to information on the flange position of the workpiece detected by the position detection sensor.

A plurality of position detection sensors are disposed on the sensor mount member at regular intervals to detect the position of a corner portion formed on the flange of the workpiece.

The sensor mount member may include a sensor mount frame formed in a circular ring shape surrounding the outside of the workpiece, and a plurality of sensor brackets arranged at regular intervals on the sensor mount frame to fix the position detection sensor. .

A plurality of frame fastening holes are arranged along the circumferential direction of the sensor mount frame, and a bracket fastening hole corresponding to the frame fastening hole is formed to pass through the sensor bracket, and a bolt is fastened through the frame fastening hole and the bracket fastening hole, so that the sensor A bracket may be fixed to the sensor mount frame.

According to another aspect of the present invention, a guide rail is installed along the circumferential direction of the sensor mount frame, a wave-shaped positioning plate is installed on an upper or lower surface of the guide rail, and the guide rail is installed on the sensor bracket. A guide rib moving along is formed to protrude, and the guide rib moves up and down elastically by the bending of the positioning plate, and when the sensor bracket stops, the sensor for the sensor mount frame is elastically inserted into the groove part of the positioning plate An elastic coupling member for fixing the position of the bracket may be installed.

In addition, the apparatus for positioning and transporting a workpiece of the present invention further includes a height adjusting means for adjusting the height of the position detection sensor according to the shape and size of the workpiece by moving the sensor mount frame upward with respect to the transfer frame by a certain distance. can do.

A plurality of the holders are arranged at regular intervals along the circumferential direction, and each holder can fix the inner circumferential surface of the hollow part of the workpiece while moving in the radial direction of the workpiece by a linear motion device installed inside the rotating member.

In addition, an inclined surface is formed on the inner surface of the upper end of each of the plurality of holders, and a hemispherical holder operating tool moving up and down by a holder actuator is installed in contact with the inclined surface, and each holder is connected to each other by a compression spring. can

A method for adjusting and transferring the position of a workpiece of a machine tool using the device for positioning and feeding a workpiece of a machine tool according to the present invention as described above,

(S1) mounting the workpiece to the holder of the positioning unit;

(S2) detecting the position of the flange of the workpiece with a position detection sensor;

(S3) adjusting the direction of the workpiece by operating the rotary drive unit according to the flange position information of the workpiece detected by the position detection sensor; and,

(S4) transferring the workpiece to a position where it can be gripped by the chuck by the drive unit horizontally moving the transfer frame by a predetermined distance;

can include

A plurality of position detection sensors may be disposed on the sensor mount member at regular intervals to detect the position of a corner portion formed on the flange of the workpiece.

According to the present invention, the workpiece can be fixed to the chuck in a state in which the position of the workpiece is accurately adjusted using the workpiece position adjustment and transfer device before fixing the workpiece to the chuck. In this way, when the workpiece is transferred to the chuck in a state in which the position of the workpiece is precisely aligned, and grinding processing is performed, machining accuracy can be improved.

1 is a perspective view showing an apparatus for positioning and transporting a workpiece of a machine tool according to an embodiment of the present invention.
FIG. 2 is a side view of the work piece positioning and conveying device shown in FIG. 1;
FIG. 3 is a longitudinal sectional view of the device for positioning and transporting a workpiece shown in FIG. 1;
4 is a cross-sectional view of main parts of another embodiment of a device for positioning and transporting a workpiece according to the present invention.
5A and 5B are cross-sectional views showing main parts of another embodiment of a device for positioning and transporting a workpiece according to the present invention.
Fig. 6 is a cross-sectional view of the work piece positioning and conveying device shown in Fig. 5A.
7 is a longitudinal sectional view showing another embodiment of a work piece positioning and conveying device according to the present invention.

With reference to the accompanying drawings, an apparatus and method for adjusting the position of a workpiece and transferring a machine tool according to embodiments of the present invention will be described in detail. Since the present invention can have various changes and various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals have been used for like elements throughout the description of each figure. In the accompanying drawings, the dimensions of the structures are shown enlarged than actual for clarity of the present invention, or reduced than actual in order to understand the schematic configuration.

Also, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. Meanwhile, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

1 to 3 show a device for positioning and transporting a workpiece of a machine tool according to an embodiment of the present invention, and the device for positioning and transporting a workpiece of a machine tool according to this embodiment is fixedly installed in the machine tool. The fixed frame 10, the transport frames 21 and 22 that are movably installed on the fixed frame 10 and move to a position close to or away from the chuck (not shown) of the machine tool, and the fixed frame 10 A driving unit that horizontally transfers the transfer frame, a positioning unit 30 that fixes the workpiece W and performs a positioning function, a sensor mount member fixedly installed to the transfer frame 21 and 22, and a sensor mount member fixed to the sensor mount member. A plurality of position detection sensors 60 installed to detect the position of the flange F of the workpiece W fixed to the position adjusting unit 30, and the workpiece detected by the position detection sensor 60 ( W) includes a control unit (not shown) for adjusting the direction of the workpiece by operating the position adjusting unit 30 according to the location information of the flange F.

The fixing frame 10 is fixedly installed on one side of a chuck (not shown) of the machine tool. The fixed frame 10 is provided with a driving unit for horizontally moving the transport frames 21 and 22 and the transport frames 21 and 22 .

The transfer frames 21 and 22 include a horizontal transfer frame 21 installed to be horizontally movable along a horizontal guide member 23 by a horizontal driving unit installed in the fixed frame 10, and the horizontal transfer frame 21 ) Includes a vertical transfer frame 22 installed to move in the vertical direction along the vertical guide member 24 by the vertical drive unit installed in the.

The driving unit includes a horizontal driving unit for horizontally moving the horizontal transfer frame 21 with respect to the ground on the fixed frame 10, and the vertical transfer frame 22 from the horizontal transfer frame 21 to the ground ) includes a vertical drive for moving in a direction perpendicular to The horizontal driving unit and the vertical driving unit may be configured by applying a known linear motion device, for example, a motor and a ball screw rotated by the motor, and coupled to the outer surface of the ball screw to rotate the ball screw. A nut portion moving in the longitudinal direction of the screw may be included. In addition, a known linear movement device such as a linear motor, or a motor and a plurality of pulleys, a timing belt wound around and rotating a plurality of pulleys, or a pneumatic cylinder may be applied.

The position adjusting unit 30 includes a rotating member 31 installed to rotate about one axis (an axis perpendicular to the ground in this embodiment) of the vertical transfer frame 22, and the rotating member 31 It is installed on one end of the holder 32 for releasably fixing the workpiece, and a rotation drive unit for transmitting rotational force to the rotation member 31.

The holder 32 is configured to detachably fix the inner circumferential surface of the workpiece W while being inserted into the hollow of the workpiece W. In this embodiment, a plurality of holders 32 are constant along the circumferential direction. Arranged at intervals, each holder 32 fixes the inner circumferential surface of the workpiece W while moving in the radial direction of the workpiece W by a linear motion device such as a pneumatic cylinder installed inside the rotating member 31 do. A holder guide rail 32a and a holder guide protrusion 31a are installed between the lower end of the rotating member 31 and the upper end of the holder 32 .

In order to move the plurality of holders 32 as one linear motion device, as shown in FIGS. 5A, 5B and 6, an inclined surface 34 is formed on the inner surface of the upper end of the holder 32. And, the holder actuator 35 in the form of a hemisphere that moves up and down by the holder actuator 36 is installed in contact with the inclined surface 34, and each holder 32 is connected to each other by a compression spring 37 can be configured to Therefore, when the holder actuating member 35 descends by the holder actuator 36, the holder actuating member 35 descends along the inclined surface 34 of the holder 32 so that the plurality of holders 32 simultaneously operate on the compression spring 37. ) overcoming the elastic force of the workpiece W, and when the holder actuator 35 rises by the holder actuator 36, the plurality of holders 32 are moved by the elastic force of the compression spring 37 At the same time, while being closed, the fixed state of the holder 32 and the workpiece W is released.

Referring again to FIGS. 1 to 3 , the rotating member 31 is formed in a cylindrical shape, and an upper end is connected to a rotation drive motor 33 constituting a rotation drive unit to rotate. The rotation drive motor 33 is electrically connected to a controller (not shown) and receives a control signal from the controller (not shown) to rotate.

The position detection sensor 60 is installed in various numbers and intervals according to the shape and size of the flange F of the workpiece W, etc. In this embodiment, three corners are formed on the flange F of the workpiece W. There is, three position detection sensors 60 are arranged at regular intervals on the sensor mount member, that is, at intervals of 120 ° so that each corner formed on the flange F can be individually detected and position coordinates can be calculated. As the position detection sensor 60, a known proximity sensor or the like can be applied.

The sensor mount member has a circular ring shape surrounding the outside of the workpiece W, and the sensor mount frame 40 fixed to the horizontal transfer frame 21 and the sensor mount frame 40 are spaced at regular intervals. It includes a plurality of sensor brackets 50 arranged and fixing the position detection sensor 60.

In order to be able to change the position of the position detection sensor 60 according to the shape, size, type, etc. of the flange F of the workpiece W, a plurality of frame fastening holes along the circumferential direction of the sensor mount frame 40 41 is arranged, and the sensor bracket 50 has a bracket fastening hole 51 corresponding to the frame fastening hole 41 formed to penetrate, so that the sensor bracket 50 on the sensor mount frame 40 After the position adjustment is finished, the sensor bracket 50 may be fixed to the sensor mount frame 40 by fastening the bolt 42 through the frame fastening hole 41 and the bracket fastening hole 51 .

Alternatively, as shown in FIG. 4, a guide rail 45 is installed along the circumferential direction of the sensor mount frame 40, and a wave-shaped positioning plate is installed on the upper or lower surface of the guide rail 45. 46 is installed, and a guide rib 55 moving along the guide rail 45 is formed to protrude from the sensor bracket 50, and the guide rib 55 has a bend of the positioning plate 46. Elastic coupling that fixes the position of the sensor bracket 50 with respect to the sensor mount frame 40 while being elastically moved up and down by the sensor bracket 50 is elastically inserted into the groove portion of the positioning plate 46 when it stops A member 56 may be installed. The elastic coupling member 56 is elastically supported with respect to the guide rib 55 by the compression coil spring 57.

A detailed description of a method of adjusting and transferring the position of a workpiece of a machine tool using the workpiece position adjustment and transfer device having the above configuration is as follows.

The workpiece W is mounted on the holder 32 of the position adjusting unit 30 . At this time, the holder 32 is inserted into the hollow part of the workpiece W, and then the linear motion device is operated to open the holder 32 to fix the workpiece W.

Subsequently, the position of the corner portion formed on the flange F of the workpiece W is detected by the plurality of position detection sensors 60 . A position sensing signal by the position detection sensor 60 is transmitted to a controller (not shown). Accordingly, the control unit (not shown) applies a control signal to the rotation drive motor 33 of the position adjusting unit 30 based on the position detection signal transmitted by the position detection sensor 60 to rotate the rotation member 31 and , The position of the workpiece W is accurately adjusted.

When the position adjustment process as described above is completed, the controller (not shown) applies a control signal to the drive unit to horizontally move the horizontal transfer frame 21 a certain distance with respect to the fixed frame 10, and then the vertical transfer frame 22 ) is moved in the vertical direction with respect to the horizontal transfer frame 21 to transfer the workpiece W to a position where it can be gripped by the chuck.

In this way, before fixing the workpiece W to the chuck of the machine tool, the workpiece W is placed on the chuck in a state in which the position of the workpiece W is precisely adjusted using the workpiece position adjustment and transfer device of the present invention. When fixed, the grinding process proceeds in a state in which the position of the workpiece W is precisely aligned, so that the quality of processing can be improved.

On the other hand, as described above, when detecting the position of the workpiece (W), when the height of the position detection sensor 60 is to be adjusted according to the shape and size of the workpiece (W), the sensor as shown in FIG. 7 A height adjustment means for moving the mount frame 40 upward by a predetermined distance relative to the horizontal transfer frame 21 may be additionally configured. The height adjustment means may be configured by applying a known linear motion device. In this embodiment, the height adjustment means is installed to extend vertically in the horizontal transfer frame 21 to guide the vertical movement of the sensor mount frame 40. An elevating guide member 71, a ball screw 72 installed to extend vertically on the horizontal transfer frame 21, an elevating motor 73 rotating the ball screw 72, and the ball screw 72 It is coupled to the outer surface of the ball screw 72 and includes a nut portion 74 that moves in the longitudinal direction of the ball screw 72 according to the rotation of the ball screw 72, and the nut portion 74 is coupled to the sensor mount frame 40 .

In the above, the present invention has been described in detail with reference to the examples, but those skilled in the art to which the present invention belongs will be able to make various substitutions, additions, and modifications without departing from the technical idea described above. Of course, it should be understood that such modified embodiments also belong to the protection scope of the present invention, which is determined by the utility model registration claims attached below.

W: Workpiece F: Flange
10: fixed frame 21: horizontal transfer frame
22: vertical transfer frame 23: horizontal guide member
24: vertical guide member 30: position adjustment unit
31: rotating member 32: holder
33: rotation drive motor 35: holder operating tool
36: holder actuator 37: compression spring
40: sensor mount frame 41: frame fastening hole
42: bolt 45: guide rail
46: positioning plate 50: sensor bracket
51: bracket fastening hole 55: guide rib
56: elastic coupling member 57: compression coil spring
60: position detection sensor 71: lifting guide member
72: ball screw 73: lifting motor
74: nut part

Claims (10)

A fixed frame fixedly installed on one side of the chuck of the machine tool;
A transfer frame movably installed on the fixed frame and moving to a position close to or away from the chuck of the machine tool;
a driving unit for horizontally transporting the transfer frame with respect to the fixed frame;
A position including a rotation member installed to rotate about one axis on the transfer frame, a holder installed on one end of the rotation member to releasably fix the workpiece, and a rotation drive unit that transmits rotational force to the rotation member. coordination department;
a sensor mount member fixedly installed to the transfer frame;
a position detection sensor installed on the sensor mount member to detect a position of a flange of the workpiece fixed to the holder; and,
a control unit for adjusting the direction of the workpiece by operating the rotary drive unit according to the flange position information of the workpiece detected by the position detection sensor;
Including,
The plurality of position detection sensors are disposed on the sensor mount member at regular intervals to detect the position of a corner portion formed on the flange of the workpiece,
The sensor mount member is a machine tool including a sensor mount frame formed in a circular ring shape surrounding the outside of a workpiece, and a plurality of sensor brackets arranged at regular intervals on the sensor mount frame to fix the position detection sensor. A device for positioning and transporting workpieces. delete delete The method of claim 1, wherein a plurality of frame fastening holes are arranged along the circumference of the sensor mount frame, and bracket fastening holes corresponding to the frame fastening holes are formed to pass through the sensor bracket, so that the frame fastening holes and the bracket fastening holes are formed. A device for positioning and transporting workpieces of machine tools in which the sensor bracket is fixed to the sensor mount frame by fastening bolts through it. The method of claim 1, wherein a guide rail is installed along the circumferential direction of the sensor mount frame, a wave-shaped positioning plate is installed on an upper or lower surface of the guide rail, and the sensor bracket moves along the guide rail. A guide rib is formed so as to protrude, and the guide rib moves up and down elastically by the bending of the positioning plate, and when the sensor bracket stops, it is elastically inserted into the groove of the positioning plate and the position of the sensor bracket relative to the sensor mount frame A device for positioning and transporting a workpiece of a machine tool in which an elastic coupling member for fixing is installed. The position of the workpiece of the machine tool according to claim 1, further comprising a height adjusting means for adjusting the height of the position detection sensor according to the shape and size of the workpiece by moving the sensor mount frame upward by a predetermined distance with respect to the transfer frame. adjustment and conveying devices. According to claim 1, wherein the plurality of holders are arranged at regular intervals along the circumferential direction, and each holder is moved in the radial direction of the workpiece by a linear motion device installed inside the rotating member, and the inner circumferential surface of the hollow part of the workpiece A device for positioning and transporting workpieces of machine tools to fix the The method of claim 7, wherein an inclined surface is formed on the inner surface of the upper end of each of the plurality of holders, a hemispherical holder operating tool moving up and down by a holder actuator is installed in contact with the inclined surface, and each holder is a compression spring A device for positioning and transporting workpieces of machine tools connected to each other by A method of adjusting and transferring the position of a workpiece of a machine tool by using the device for positioning and transferring a workpiece of a machine tool according to any one of claims 1 and 4 to 8,
(S1) mounting the workpiece to the holder of the positioning unit;
(S2) detecting the position of the flange of the workpiece with a position detection sensor;
(S3) adjusting the direction of the workpiece by operating the rotary drive unit according to the flange position information of the workpiece detected by the position detection sensor; and,
(S4) transferring the workpiece to a position where it can be gripped by the chuck by the drive unit horizontally moving the transfer frame by a predetermined distance;
Position adjustment and transfer method of the workpiece of the machine tool comprising a. [Claim 10] The method of claim 9, wherein a plurality of position detection sensors are disposed on the sensor mount member at regular intervals to detect a position of a corner portion formed on a flange of the workpiece.

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