KR20220118202A - Apparatus And Method for Adjustment And Transfer of Workpiece on Machine Tool - Google Patents

Abstract

The present invention relates to an apparatus and a method for adjusting and transferring of a workpiece in a machine tool, which accurately detects and adjusts a position of a flange of a workpiece in a machine tool, and transfers the workpiece to a chuck, thereby improving the precision of machining. The apparatus according to one aspect of the present invention includes: a fixed frame which is installed to be fixed on one side of a chuck of a machine tool; a transfer frame which is installed to be movable with respect to a fixed frame and moves to a position close to or distant from the chuck of the machine tool; a driving unit which horizontally transfers the transfer frame with respect to the fixed frame; a position adjusting unit which includes a rotating member installed to rotate around one axis with respect to the transfer frame, a holder installed at one end of the rotating member and fixes the workpiece to be releasable, and a rotating drive unit transmitting rotational force to the rotating member; a sensor mount member which is installed to be fixed to the transfer frame; a position detection sensor which is installed in the sensor mount member and detects the position of the flange of the workpiece fixed to the holder; and a control unit which operates the rotating drive unit according to the position information of the flange of the workpiece detected by the position detection sensor to adjust the direction of the workpiece.

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 adjusting the position of a workpiece in a machine tool and transferring the workpiece to a chuck after detecting and adjusting the flange position of the workpiece in the machine tool.

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

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

In particular, when grinding a workpiece in which a plurality of edges are formed on the flange, alignment of the workpiece is very important.

However, in a conventional machine tool such as a grinding machine, the operation of checking the presence or absence of an abnormality in the workpiece before processing is performed, but it does not accurately align the direction of the workpiece to be fixed to the chuck. This is a factor that slightly degrades the performance of the machine tool and reduces the machining quality.

Republic of Korea Registered Utility Model No. 20-0227467 Republic of Korea Patent Registration 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 position of the flange of the workpiece in the machine tool, and then transfer the workpiece to the chuck to improve the machining precision. It is to provide an apparatus and method for positioning and transporting a workpiece.

In accordance with one aspect of the present invention for achieving the above object, there is provided an apparatus for positioning and transferring a workpiece of a machine tool, comprising: a fixed frame that is fixedly installed on one side of a chuck of a machine tool; a transfer frame that is movably installed on the fixed frame and moves closer to or away from the chuck of the machine tool; a driving unit for horizontally transporting the transport frame with respect to the fixed frame; A position comprising a rotating member installed on the transfer frame to rotate about one axis, a holder installed at one end of the rotating member to releasably fix a workpiece, and a rotational driving unit transmitting rotational force to the rotating member coordinator; a sensor mount member fixedly installed to the transfer frame; a position detection sensor installed on the sensor mounting member to detect a position of a flange of a workpiece fixed to the holder; and a control unit for controlling the direction of the workpiece by operating the rotation drive unit according to the flange position information of the workpiece detected by the position detection sensor.

A plurality of the position detection sensors are arranged at regular intervals on the sensor mounting member to detect a position of a corner portion formed on a flange of a 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 in the sensor mount frame in a circumferential direction, and a bracket fastening hole corresponding to the frame fastening hole is formed in the sensor bracket to penetrate through the frame fastening hole and the bolt is fastened through the bracket fastening hole. 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 surface or a lower surface of the guide rail, and the guide rail is installed on the sensor bracket. A guide rib moving along An elastic coupling member for fixing the position of the bracket may be installed.

In addition, the workpiece position adjustment and transport device of the present invention further comprises a height adjustment means for moving the sensor mount frame upward with respect to the transport frame by a certain distance to adjust the height of the position detection sensor according to the shape and size of the workpiece. can do.

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

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 that moves up and down by a holder actuator is installed adjacently to the inclined surface, and each holder is connected to each other by a compression spring. can

The method of adjusting and transporting the position of the workpiece of the machine tool by using the position adjustment and transfer device of the workpiece of the 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) controlling the direction of the workpiece by the control unit operating the rotation drive unit according to the flange position information of the workpiece detected by the position detection sensor; and,

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

may include

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

According to the present invention, it is possible to fix the workpiece to the chuck in a state in which the position of the workpiece is accurately adjusted by using the workpiece position adjustment and transfer device before fixing the workpiece to the chuck. As described above, when the workpiece is transferred to the chuck in a state where the position of the workpiece is precisely aligned and the grinding process is performed, machining precision can be improved.

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

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

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

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 the machine tool of this embodiment is fixedly installed on the machine tool. With respect to the fixed frame (10), the transfer frames (21, 22) and the fixed frame (10) 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. A driving unit for horizontally transporting the transfer frame, a position adjusting unit 30 for fixing the workpiece (W) and performing a position adjustment function, a sensor mount member fixedly installed on the transfer frame (21, 22), and the sensor mount member A plurality of position detection sensors 60 for detecting the position of the flange F of the workpiece W installed and 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 position information of the flange (F).

The fixed frame 10 is fixedly installed on one side of the chuck (not shown) of the machine tool. A driving unit for horizontally moving the transfer frames 21 and 22 and the transfer frames 21 and 22 is installed in the fixed frame 10 .

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 on 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 a 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 moving 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. 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 the ball screw is coupled to the outer surface of the ball screw to rotate the ball screw. It may include a nut portion moving in the longitudinal direction of the screw. In addition, it can be configured by applying a known linear motion device such as a linear motor, or a motor and a plurality of pulleys, a timing belt wound around the plurality of pulleys, or a pneumatic cylinder.

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) on the vertical transfer frame 22, and the rotating member 31 It is installed at one end of the holder (32) for releasably fixing the workpiece, and includes a rotational drive unit for transmitting the rotational force to the rotating member (31).

The holder 32 is configured to separably fix the inner circumferential surface of the workpiece W while being inserted into the hollow portion of the workpiece W. In this embodiment, a plurality of holders 32 are constant along the circumferential direction. Arranged at intervals, each holder 32 is fixed to the inner peripheral 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 allow the plurality of holders 32 to move 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 a hemispherical holder actuating tool 35 that moves up and down by a holder actuator 36 is installed on the inclined surface 34 adjacently, and each holder 32 is connected to each other by a compression spring 37 It can be configured to Therefore, when the holder actuator 35 descends by the holder actuator 36, the holder actuator 35 descends along the inclined surface 34 of the holder 32, so that the plurality of holders 32 are simultaneously compressed by the compression spring 37. ), it spreads out and comes in close contact with the inner circumferential surface of the workpiece (W), and when the holder actuator 35 rises by the holder actuator 36, the plurality of holders 32 are formed by the elastic force of the compression spring 37. While being closed at the same time, the fixed state of the holder 32 and the workpiece W is released.

Referring back to FIGS. 1 to 3 , the rotating member 31 has a cylindrical shape, and the upper end thereof is connected to the rotation driving motor 33 constituting the rotation driving unit to rotate. The rotation driving motor 33 is electrically connected to a control unit (not shown) and rotates by receiving a control signal from the control unit (not shown).

The position detection sensor 60 is installed in various numbers and intervals depending on the shape and size of the flange F of the workpiece W, and in this embodiment, three corners are located on the flange F of the workpiece W. Exists, and three position detection sensors 60 are arranged at regular intervals on the sensor mounting member, that is, at intervals of 120°, so as to calculate position coordinates by individually detecting each edge formed on the flange (F). As the position detection sensor 60 , a known proximity sensor or the like may be applied.

The sensor mount member is formed in a circular ring shape surrounding the outer side of the workpiece (W) and fixed to the horizontal transport frame (21) with a sensor mount frame (40) and the sensor mount frame (40) at regular intervals. and a plurality of sensor brackets 50 arranged to fix the position detection sensor 60 .

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

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 disposed 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 is curved in the positioning plate 46 . An 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 A member 56 may be installed. The elastic coupling member (56) is elastically supported with respect to the guide rib (55) by a compression coil spring (57).

Hereinafter, a method of adjusting and transferring the position of the work piece of the machine tool using the work piece position adjustment and transfer device having the configuration as described above will be described in detail as follows.

The workpiece W is mounted on the holder 32 of the positioning unit 30 . At this time, after inserting the holder 32 into the hollow part of the workpiece W, the linear motion device is operated to spread the holder 32 to fix the workpiece W.

Next, the position of the edge portion formed on the flange (F) of the workpiece (W) is detected by a plurality of position detection sensors (60). The position detection signal by the position detection sensor 60 is transmitted to a control unit (not shown). Accordingly, the control unit (not shown) rotates the rotating member 31 by applying a control signal to the rotation driving motor 33 of the position adjusting unit 30 based on the position detection signal transmitted by the position detection sensor 60 , , precisely adjust the position of the workpiece (W).

When the position adjustment process as described above is completed, the controller (not shown) applies a control signal to the driving unit to horizontally move the horizontal transfer frame 21 with respect to the fixed frame 10 by a certain distance, 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 that 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 accurately adjusted using the workpiece position adjustment and transfer device of the present invention. When fixed, the machining quality can be improved because the grinding process proceeds in a state in which the position of the workpiece W is precisely aligned.

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

In the above, the present invention has been described in detail with reference to the embodiments, but those of ordinary skill in the art to which the present invention pertains may make various substitutions, additions and modifications within the scope not departing from the technical spirit described above. Of course, it should be understood that such modified embodiments also fall within the protection scope of the present invention as defined 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: positioning unit
31: rotating member 32: holder
33: rotation drive motor 35: holder operation 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: elevating guide member
72: ball screw 73: elevating motor
74: nut part

Claims (10)

a fixed frame that is fixedly installed on one side of the chuck of the machine tool;
a transfer frame that is movably installed on the fixed frame and moves closer to or away from the chuck of the machine tool;
a driving unit for horizontally transporting the transport frame with respect to the fixed frame;
A position comprising a rotating member installed on the transfer frame to rotate about one axis, a holder installed at one end of the rotating member to releasably fix a workpiece, and a rotational driving unit transmitting rotational force to the rotating member coordinator;
a sensor mount member fixedly installed to the transfer frame;
a position detection sensor installed on the sensor mounting member to detect a position of a flange of a workpiece fixed to the holder; and,
a control unit for controlling the direction of the workpiece by operating the rotation drive unit according to the flange position information of the workpiece detected by the position detection sensor;
Workpiece positioning and feeding device of a machine tool comprising a. According to claim 1, wherein a plurality of the position detection sensors are arranged at regular intervals on the sensor mounting member to detect the position of the edge portion formed on the flange of the workpiece position adjustment and transfer device of the machine tool. The sensor mount frame of claim 2, wherein the sensor mount member comprises a sensor mount frame formed in a circular ring shape surrounding the outside of the workpiece, and a plurality of sensors arranged at regular intervals on the sensor mount frame to fix the position detection sensor. A device for positioning and transporting a workpiece in a machine tool including a bracket. According to claim 3, wherein a plurality of frame fastening holes are arranged in the circumferential direction of the sensor mount frame, the sensor bracket is formed to have a bracket fastening hole corresponding to the frame fastening hole through, the frame fastening hole and the bracket fastening hole A device for adjusting the position and transferring the workpiece position of a machine tool in which the sensor bracket is fixed to the sensor mount frame by fastening the bolt through it. The guide rail according to claim 3, wherein a guide rail is installed along a circumferential direction of the sensor mount frame, a wave-shaped positioning plate is installed on an upper surface or a lower surface of the guide rail, and the sensor bracket moves along the guide rail. The position of the sensor bracket with respect to the sensor mount frame while being elastically inserted into the groove of the positioning plate when the sensor bracket stops while moving elastically up and down by the bending of the positioning plate on the guide rib A device for adjusting the position and transporting the workpiece position of a machine tool in which an elastic coupling member for fixing is installed. According to claim 3, wherein the position of the workpiece of the machine tool further comprises a height adjustment means for moving the sensor mount frame upward a predetermined distance with respect to the transfer frame to adjust the height of the position detection sensor according to the shape and size of the workpiece. Adjustment and transfer device. The inner circumferential surface of the hollow part of the workpiece according to claim 1, wherein a plurality of the holders are arranged at regular intervals along the circumferential direction, and each holder moves in the radial direction of the workpiece by a linear motion device installed inside the rotating member. A device for positioning and transporting the workpiece of a machine tool designed to fix 8. 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, and a hemispherical holder actuating tool that moves up and down by a holder actuator is installed on the inclined surface in connection with each other, and each holder has a compression spring. A device for positioning and transporting workpieces of machine tools connected to each other by means of A method of adjusting and transferring the position of a workpiece of a machine tool using the position adjustment and transfer device of the machine tool according to any one of claims 1 to 8, comprising:
(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) controlling the direction of the workpiece by the control unit operating the rotation drive unit according to the flange position information of the workpiece detected by the position detection sensor; and,
(S4) the driving unit horizontally moving the transfer frame by a predetermined distance to transfer the workpiece to a position that can be gripped by the chuck;
A method of positioning and transferring a workpiece of a machine tool comprising a. [Claim 10] The method of claim 9, wherein a plurality of the position detection sensors are arranged at regular intervals on the sensor mounting member to detect the position of a corner portion formed on the flange of the workpiece.

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