KR20220125453A - Workpiece support device of machine tool - Google Patents

Abstract

The present invention relates to a workpiece support device of a machine tool, comprising: a main spindle for clamping a workpiece to process the workpiece; a sub-spindle clamping the workpiece that is clamped to and processed by the main spindle; and a support unit installed on one side of the sub-spindle to move in conjunction with movement of the sub-spindle. The support unit moves forward and backward with respect to the sub-spindle according to the shape and type of the workpiece that is clamped to and processed by the main spindle, and selectively supports the workpiece clamped to the main spindle.

Description

Workpiece support device of machine tool

The present invention relates to a workpiece support device for a machine tool, and more particularly, to a workpiece clamped on the main spindle as the support unit moves back and forth with respect to the sub-spindle according to the shape and type of the workpiece clamped to the main spindle. It relates to a workpiece support device of a machine tool that can be selectively supported.

In general, a machine tool refers to a machine used for the purpose of machining a metal/non-metal workpiece into a desired shape and size using an appropriate tool by various cutting or non-cutting methods.

Various types of machine tools, including turning centers, vertical/horizontal machining centers, door machining centers, Swiss turns, electric discharge machines, horizontal NC boring machines, CNC lathes, etc., are widely used in various industrial sites for their respective purposes.

In general, various types of machine tools currently used have an operation panel to which a numerical control (NC) or computerized numerical control (CNC) technology is applied. Such an operation panel is provided with various function switches or buttons and a monitor.

In addition, the machine tool is a table on which a workpiece material is seated and transferred for processing the workpiece, a pallet for preparing the workpiece before processing, a spindle that rotates with a tool or workpiece combined, a tailstock for supporting the workpiece, etc. during processing, a vibration isolator etc. are provided.

In general, in a machine tool, a table, a tool rest, a main shaft, a tailstock, a vibration isolator, etc. are provided with a conveying unit conveying along a conveying axis in order to perform various machining.

In general, turning refers to rotating a workpiece, which is a material, and cutting a workpiece by contacting a cutting tool with the workpiece. In addition, today, products processed through turning have a variety of shapes and require high-precision processing, and a reduction in processing time is required.

In addition, one workpiece is continuously supplied, processed and cut, the cut part becomes a product, and the next cut part is supplied to the machining area to perform turning, and this turning method is called Swiss Turn. referred to in a way

Today, lathes or turning centers including Swiss Turn are typically used for turning, and have two spindles to process products with complex shapes to increase productivity and reduce machining time, and one It is also manufactured and used for the purpose of machining the surface other than the machined surface in the state of being clamped to the spindle.

However, in the conventional substern sub-spindle, the support method by the chuck is impossible or very inefficient to support the workpiece in the following three cases, resulting in a problem in that the machining quality of the workpiece is deteriorated.

First, according to the shape of the workpiece, there is a case where milling is performed outside the support area clamped and supported by the main spindle. In this case, there is a problem that the end support of the workpiece is impossible.

Second, in the case of a workpiece having a machining shape that cannot be chucked by a general chuck, in this case, a special chuck can be made and processed. There is a problem in that productivity is inefficient because a number of special chucks must be provided for this purpose.

Third, it is a case of machining soft materials such as plastics or soft materials that can cause dents or traces on the outer diameter of the workpiece when chucked on a sub spindle. In this case, a chuck made of a special soft material can be used. When a chuck made of a soft material is used, another problem arises in that the chips generated during the machining process are caught and traces or dents are generated on the outer diameter of the workpiece.

In addition, in order to prepare for the above-mentioned case, it can be supported by applying a tailstock. Since Swiss Turn equipment generally completes the front and rear surfaces of the workpiece, there was a problem that the front and/or rear tools interfere with the Swiss turn machining area.

In addition, if the sub-spindle and the tailstock are applied at the same time, the feed axis of the machine tool is added, and the modification of the peripheral unit is excessively required, which increases the manufacturing cost of the machine tool and hinders the miniaturization of the machine tool.

Republic of Korea Patent No. 10-1527229

The present invention is to solve the above problems, and an object of the present invention is to install a support unit on one side of the sub-spindle so that it moves in conjunction with the movement of the sub-spindle, and is clamped to the main spindle, and the shape and type of the workpiece to be processed It is to provide a workpiece support device of a machine tool that can selectively support the workpiece clamped to the main spindle as the support unit moves back and forth with respect to the sub spindle.

In order to achieve the object of the present invention, there is provided a workpiece support device for a machine tool according to the present invention, comprising: a main spindle clamping the workpiece to process the workpiece; a sub-spindle that is clamped to the main spindle and clamps the processed workpiece; and a support unit installed on one side of the sub-spindle so as to move in conjunction with the movement of the sub-spindle, wherein the support unit is clamped to the main spindle and mounted on the sub-spindle according to the shape and type of the workpiece to be processed. It is possible to selectively support the workpiece clamped to the main spindle by moving back and forth with respect to the main spindle.

In addition, in a preferred embodiment of the device for supporting the work piece of the machine tool according to the present invention, the support unit comprises: an actuator unit; a connection part coupled and installed on one side of the actuator part; a rod part extending from the actuator part through the connection part and linearly reciprocating according to the driving of the actuator part; a transmission unit disposed in a linear reciprocating motion inside the connection unit so as to be drawn into or out of the connection unit in conjunction with the rod unit; and a support part coupled to one side of the transfer part to selectively support the workpiece clamped to the main spindle.

In addition, in a preferred embodiment of the device for supporting a workpiece for a machine tool according to the present invention, when the workpiece clamped to the main spindle is supported, the feed amount of the sub spindle is adjusted in real time according to the change in the load amount due to the feed of the sub spindle. Thus, it is possible to adjust the supporting force of the work piece.

In addition, in a preferred embodiment of the device for supporting the work piece of the machine tool according to the present invention, the support unit supports the work clamped to the main spindle. In response to a change in the load amount of the support unit, the support unit separates from the linear movement of the rod unit. can be additionally linearly moved to adjust the bearing force of the workpiece in real time.

In addition, in a preferred embodiment of the device for supporting the work piece of the machine tool according to the present invention, the support unit includes: a housing unit coupled to one side of the transmission unit; a base portion disposed to be linearly reciprocally movable inside the housing portion so as to be drawn into the housing portion or drawn out of the housing portion; and a tip part which is detachably coupled and installed on one side of the base part to contact and support the workpiece clamped to the main spindle.

In addition, in a preferred embodiment of the workpiece support device of the machine tool according to the present invention, the base portion, the piston portion is arranged to be reciprocating linearly inside the housing portion; a flange portion protruding from a portion of the piston portion; and a shaft part inserted and installed in the piston part so as to be rotatable with respect to the piston part.

In addition, in a preferred embodiment of the workpiece support device of the machine tool according to the present invention, the housing portion is in contact with the flange portion during linear reciprocation of the piston portion to limit the linear reciprocation distance of the piston portion. It may include; a stepped portion formed to be stepped.

In addition, in a preferred embodiment of the workpiece support device of the machine tool according to the present invention, the support portion is formed through the housing portion in order to linearly reciprocate the piston portion, the flow passage for introducing or outflowing the fluid into the housing portion; may include.

In addition, in a preferred embodiment of the device for supporting the work piece of the machine tool according to the present invention, the support unit may include a bearing portion disposed between the piston portion and the shaft portion; and a cap unit detachably coupled and installed to one side of the housing unit.

In the workpiece support device of a machine tool according to the present invention, the support unit is installed on one side of the sub-spindle, moves in conjunction with the movement of the sub-spindle, and moves forward and backward relative to the sub-spindle. In case of outside the area clamped and supported by the main spindle according to Even when it is impossible to support the end of the workpiece in the conventional Swiss turn, such as when machining soft materials that may cause dents or traces, the support unit enables strong support in the center of the workpiece, thereby improving processing precision. there is

In addition, in the workpiece support device of the machine tool according to the present invention, the support unit does not move independently, but moves in conjunction with the movement of the sub-spindle to prevent interference with the front and/or rear tool in the Swiss turn machining area. It is possible to maintain the finished product processing on the front and rear surfaces of the workpiece, which is a general characteristic of Swiss turn equipment, while improving the machining quality. Therefore, it is possible to reduce the manufacturing cost of the machine tool and promote the miniaturization of the machine tool.

Furthermore, the workpiece support device of the machine tool according to the present invention controls the feed amount of the sub spindle in real time according to the change in the load amount due to the feed of the sub spindle when supporting the workpiece clamped to the main spindle, so that the support unit primarily supports the workpiece. By adjusting the supporting force to support and, according to the change in the load amount of the supporting unit, the supporting unit is moved in a fine straight line separately from the linear movement of the rod unit to secondarily adjust the supporting power of the work piece in real time to precisely match the shape and type of the work piece. It has the effect of improving the quality of the processed workpiece because it can be adjusted.

In addition, the workpiece support device of the machine tool according to the present invention moves forward and backward relative to the sub-spindle when the use of the support unit is not required. there is an effect

In addition, the workpiece support device of the machine tool according to the present invention does not require the use of a special chuck to process the workpiece of a shape and material that cannot be supported by the sub-spindle, so that the special chuck must match 1:1 with the workpiece As a result, there is an effect that can solve the problems of productivity inefficiency caused by the provision of a large number of special chucks for various processing and the cost increase caused by the application of special chucks that cost a lot of manufacturing cost.

In addition, in the workpiece support device of the machine tool according to the present invention, the support unit can support the workpiece clamped on the main spindle even if the sub spindle does not chuck, so the support unit supports the workpiece clamped on the main spindle and precisely the primary workpiece It has the effect of maximizing productivity because it is possible to process secondary workpieces through the sub-spindle at the same time while machining.

In addition, the workpiece support device of the machine tool according to the present invention can support the workpiece by allowing the support unit to enter the unit without interference even when machining the thread willing unit among the options of the Swiss turn equipment, so it can perform ultra-precision threading. can have an effect.

1 shows a perspective view of a workpiece support device of a machine tool according to the present invention.
FIG. 2 is a cross-sectional view taken along part AA of FIG. 1 in a state in which the main spindle is removed.
Figure 3 is a view showing in detail the support unit of the workpiece support device of the machine tool according to the present invention.
Figure 4 shows a view of a state in which the support unit of the workpiece support device of the machine tool is retracted according to the present invention.
5 is a view showing a state in which the support unit of the support unit of the workpiece support of the machine tool according to the present invention is advanced.
FIG. 6 is an enlarged view of part B of FIG. 4 .
FIG. 7 is an enlarged view of part C of FIG. 5 .
8 is a view showing a state in which the workpiece support device of the machine tool according to the present invention enters and supports the thread willing unit during processing of the thread willing (thread processing) unit.
9 is a cross-sectional view taken along the DD portion of FIG. 8 in a state in which the main spindle is removed.

Hereinafter, with reference to the drawings of the workpiece support device of the machine tool according to an embodiment of the present invention will be described in detail. The embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. And, in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numbers refer to like elements throughout.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of description.

The terminology used herein is for the purpose of describing the embodiments, and therefore is not intended to limit the present invention. In this specification, the singular also includes the plural, unless specifically stated otherwise in the phrase. As used herein, “comprise” and/or “comprising” refers to the presence of one or more other components, steps, operations and/or elements mentioned. or addition is not excluded.

Figure 1 shows a perspective view of a workpiece support device of a machine tool according to the present invention, Figure 2 shows a cross-sectional view taken along section A-A of Figure 1 in a state in which the main spindle is removed.

Figure 3 is a view showing in detail the support unit of the workpiece support device of the machine tool according to the present invention, Figure 4 is a view showing a state in which the support unit of the support unit of the workpiece support device of the machine tool according to the present invention is retracted.

5 is a view showing a state in which the support unit of the work support device of the machine tool is advanced according to the present invention, Figure 6 is an enlarged view of the portion B of FIG.

7 is an enlarged view of part C of FIG. 5, and FIG. 8 is a state in which the workpiece support device of the machine tool according to the present invention enters and supports the thread willing unit during processing of the thread willing (screw processing) unit. It is a drawing.

9 is a cross-sectional view taken along a portion D-D of FIG. 8 in a state in which the main spindle is removed.

A work support device 1 of a machine tool according to the present invention will be described with reference to FIGS. 1 to 9 . As shown in FIGS. 1 to 9 , the workpiece support device 1 of a machine tool according to the present invention includes a main spindle 100 , a sub spindle 200 , and a support unit 300 .

The main spindle 100 clamps the workpiece 2 to machine the workpiece 2 .

The sub spindle 200 is clamped to the main spindle 100 to clamp the machined workpiece 2 .

The sub-spindle 200 is installed adjacent to the main spindle 100 and clamped to the main spindle 100 to process the workpiece 2 that has been machined first. That is, the sub-spindle 200 may be clamped to the main spindle and simply process a pre-machined workpiece as needed. Alternatively, the sub-spindle 200 may be clamped to the main spindle and clamped to a different surface or the same surface of the pre-machined workpiece by clamping it to obtain a different type of workpiece. processing can be performed.

The support unit 300 of the workpiece support device 1 of the machine tool according to the present invention is installed on one side of the sub spindle 200 so as to move in conjunction with the movement of the sub spindle 200 .

That is, the support unit 300 of the workpiece support device 1 of the machine tool according to the present invention does not move separately according to a separate drive from the sub spindle 200, but the position of the support unit by the movement of the sub spindle is also fluctuates

In the case of the machine tool support device according to the present invention, the support unit does not move independently of the sub-spindle like the tailstock, but moves in conjunction with the sub-spindle. And/or it is possible to maintain the finished product processing on the front and rear surfaces of the workpiece, which is a general characteristic of Swiss Turn equipment, while improving the machining quality by preventing the occurrence of interference with the rear tool, and excessive use of peripheral units of the machine tool. Since it is linked according to the feed of the sub-spindle without the need to modify or add an additional feed axis, it is possible to reduce the manufacturing cost of the machine tool and to reduce the size of the machine tool.

In addition, the support unit 200 of the workpiece support device 1 of the machine tool according to the present invention is clamped to the main spindle 100 and front and rear for the sub spindle 200 according to the shape and type of the workpiece 2 to be processed. It is possible to selectively support the workpiece clamped to the main spindle 100 by moving it.

The shape and type of the workpiece 2 refers to a workpiece having a machining shape that cannot be chucked by a general sub-spindle when the workpiece clamped to the main spindle and processed is out of the area clamped and supported by the main spindle according to the shape of the workpiece. In this case, in the case where it is impossible to support the end of the workpiece in the conventional Swiss turn, such as in the case of machining a soft material that can cause dents or traces on the outer diameter of the workpiece when chucked on a soft material such as plastic or a sub spindle, It may mean a case of a general work piece, not a case.

In addition. Forward means moving in a direction adjacent to the main spindle 100 , and backward means moving in a direction away from the main spindle 100 .

Specifically, the support unit 300 includes an actuator unit 310 , a connection unit 320 , a rod unit 330 , a transmission unit 340 , and a support unit 350 .

The actuator part 310 is installed at the rear of the support unit and serves to linearly reciprocate the rod part 330 by inflowing pneumatic or hydraulic pressure, and the connection part 320 is one side of the actuator part 310 (that is, 3 to 5 are coupled to the left side).

The rod part 330 is disposed extending from the actuator part 310 through the connection part 320, and as described above, the actuator part 310 is driven by pneumatic or hydraulic pressure flowing into the actuator part 310. The rod part 330 is linearly reciprocated.

The transfer unit 340 is linearly reciprocated in conjunction with the linearly reciprocating rod 330 so as to be drawn into the inside of the connecting unit 320 or drawn out of the connecting unit 320 as it linearly reciprocates. It is arranged to be reciprocally movable.

The support part 350 is coupled to one side of the delivery part 340 to selectively support the workpiece clamped to the main spindle 100 .

That is, when the rod part 330 is drawn out of the actuator part by the driving of the actuator part as shown in FIG. 5, the transmission part interlocking therewith is also drawn out of the connection part, and the support part coupled to one side of the connection part is also in the direction adjacent to the main spindle. As it moves, the workpiece clamped to the main spindle is supported when support is required according to the shape and type of the workpiece to be processed by being clamped to the main spindle.

Conversely, as shown in FIG. 4 , when the actuator unit is driven into the actuator unit, the transmission unit interlocking therewith is also drawn into the connection unit, and the support unit coupled to one side of the connection unit is also moved away from the main spindle as it moves away from the main spindle. If support is not required depending on the shape and type of the workpiece being processed, the workpiece clamped to the main spindle is not supported.

As such, in the workpiece support device of the machine tool according to the present invention, the support unit is installed on one side of the sub-spindle, moves in conjunction with the movement of the sub-spindle, and moves forward and backward relative to the sub-spindle. If it is outside the area clamped and supported by the main spindle depending on the shape of Even when it is impossible to support the end of the workpiece in the conventional Swiss turn, such as when machining soft materials that may have dents or traces, the support unit can support it firmly in line with the center of the workpiece, improving processing precision. have.

In addition, in the workpiece support device of the machine tool according to the present invention, since the support unit moves forward and backward with respect to the sub-spindle, if support is required according to the shape and type of the workpiece clamped on the main spindle, the support unit advances and supports, When the use of the unit is not required, the support unit is moved backwards on the sub spindle to prevent the interference between the equipment in advance without removing the support unit when processing general workpieces.

3 to 7 , the support part 350 of the workpiece support device 1 of the machine tool according to the present invention includes a housing part 351 , a tip part 357 , a base part 353 , and a flow path part 358 . ) is included.

The housing part 351 is coupled to one side of the delivery part 340 and moves according to the movement of the delivery part 340 , and a base part 353 , a tip part 357 , a bearing part 360 , etc. are disposed therein. It serves to protect these parts.

In addition, the housing part 351 is in contact with the flange part 355 during linear reciprocation of the piston part 354 to be described later to limit the linear reciprocation distance of the piston part 354. Inside the housing part 351 It includes a stepped portion 352 formed to be stepped.

The tip portion 357 is detachably coupled to one side of the base portion 353 to directly contact the workpiece clamped to the main spindle 100 to support the workpiece clamped to the main spindle 100 .

Specifically, the tip portion 357 may be coupled to the shaft portion 356 among the base portion 353 and rotated together with the shaft portion as will be described later.

6 and 7 , the base part 353 is linearly reciprocally disposed inside the housing part 351 so as to be drawn into the housing part 351 or drawn out of the housing part 351 . .

The base part 353 can be drawn out of the housing part as shown in FIG. 6 and can be linearly reciprocated so that it can be drawn into the housing part as shown in FIG. It can be done separately from the linear movement of

Specifically, the base part 353 includes a piston part 354 , a flange part 355 , and a shaft part 356 .

The piston part 354 is disposed so as to be linearly reciprocally movable inside the housing part 351 , and serves as a driving source for linearly reciprocating the base part 353 .

The flange part 355 is formed to protrude from a part of the piston part 354 , and the flange part 355 is disposed adjacent to the stepped part 352 of the above-described housing part 351 to reciprocate linearly of the piston part 354 . During movement, the flange portion 355 is in contact with the stepped portion 352 to limit the linear reciprocating distance of the piston portion 354 .

The shaft part 356 is inserted into the piston part 354 so as to be rotatable with respect to the piston part 354 and rotates the tip part 357 installed on the shaft part 356 so that the tip part 357 is attached to the main spindle. It serves to allow the workpiece 2 to rotate smoothly when supporting the clamped workpiece.

Referring to FIG. 3 , the flow passage 358 is formed to pass through the housing 351 to linearly reciprocate the piston 354 , and serves as a passage through which a fluid flows into or out of the housing 351 .

In addition, although not shown in the drawings, the flow path part 358 is a pneumatic or hydraulic pump or pneumatic or hydraulic tank that supplies pneumatic or hydraulic pressure to the flow path part 358 in order to linearly reciprocate the piston part 354 . It is connected and installed through a pipe such as a hydraulic pressure supply source and a hose, and various valves are installed on the pipe.

The pneumatic or hydraulic power source supplies or recovers the pneumatic or hydraulic pressure according to the workpiece processing program, etc. through a numerical control device or PLC (Programmable Logic Controller).

The support unit 300 of the workpiece support device 1 of the machine tool according to the present invention includes a bearing part 360 and a cap part 370 .

The bearing part 360 is disposed between the piston part 354 and the shaft part 356 and serves to support a load generated when the shaft part 350 rotates, and the cap part 370 is the housing part 351 . It is installed detachably on one side and serves to prevent foreign substances such as chips or dust generated from the outside from penetrating into the inside of the support unit.

The workpiece support device 1 of the machine tool according to the present invention supports the workpiece 2 clamped to the main spindle 100 in real time according to the change in the amount of load caused by the transfer of the sub spindle 200. It is possible to adjust the support force of the work piece 2 by adjusting the feed amount.

As described above, the support unit 300 is installed on one side of the sub-spindle 200 to move in conjunction with the movement of the sub-spindle 200 . That is, the support unit 300 does not move independently of the sub-spindle 200, but moves together with the sub-spindle.

That is, in the workpiece support device of the machine tool according to the present invention, since the support unit moves together with the sub spindle, when supporting the workpiece clamped to the main spindle, the load amount by the feed of the sub spindle is primarily fed back, and the feed amount of the sub spindle in real time can be adjusted to adjust the supporting force that the support unit primarily supports the workpiece.

In addition, the support unit 300 of the workpiece support device 1 of the machine tool according to the present invention supports the workpiece 2 clamped to the main spindle 100 according to the change in the load amount of the support part 350 when the rod part ( Separately from the linear movement of the 330), the support unit 350 may be additionally linearly moved to adjust the bearing force of the work piece in real time.

As described above, as the base part 353 of the support part 350 is linearly and reciprocally disposed inside the housing part 351, the tip part detachably installed in the base part is linearly and reciprocally moved, which ultimately The position of the tip part 357 supporting the workpiece clamped to the main spindle is changed, so that the support force of the tip part supporting the workpiece clamped to the main spindle is finely and precisely controlled.

As described above, when the workpiece support device of the machine tool according to the present invention supports the workpiece clamped to the main spindle, it is primarily supported by adjusting the feed amount of the sub spindle in real time according to the change in the load amount due to the feed of the sub spindle. As well as adjusting the support force the unit supports the workpiece. According to the change in the load amount of the support part, the base part is arranged to be reciprocally movable in a straight line inside the housing part separately from the linear movement of the rod part. It is possible to precisely control the bearing force according to the characteristics of the fruit and to improve the quality of the processed workpiece.

In addition, referring to FIGS. 8 and 9 , in the workpiece support device of the machine tool according to the present invention, the support unit 300 is installed on one side of the sub spindle 200 , and compared to the sub spindle 200 , it is compact and slim. Since the subspindle can move forward and backward independently of the spindle, even when machining is applied by applying the thread willing unit, only the support unit can be advanced so that it can be drawn into the interior of the thread willing unit without interference.

As such, the workpiece support device of the machine tool according to the present invention can support the workpiece by allowing the support unit to enter the unit without interference even when machining the thread willing unit among the options of the Swiss turn equipment, so that super-precision threading can be performed. have.

In the detailed description of the present invention described above, although it has been described with reference to preferred embodiments of the present invention, those skilled in the art or those having ordinary skill in the art will It will be understood that various modifications and variations of the present invention can be made without departing from the spirit and scope of the present invention. Accordingly, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1: Workpiece support device of a machine tool, 2: Workpiece
3: Tool, 4: Thread Willing Unit
100: main spindle, 200: sub spindle,
300: support unit, 310: actuator unit,
320: connection part, 330: rod part,
340: transfer part, 350: support part,
360: bearing part, 370: cap part,

Claims (9)

a main spindle clamping the workpiece to machine the workpiece;
a sub-spindle that is clamped to the main spindle and clamps the processed workpiece; and
Including; a support unit installed on one side of the sub-spindle to move in conjunction with the movement of the sub-spindle;
The support unit is clamped to the main spindle and moves back and forth with respect to the sub-spindle according to the shape and type of the workpiece to be processed to selectively support the workpiece clamped to the main spindle. Device.
According to claim 1,
The support unit is
actuator unit;
a connection part coupled and installed on one side of the actuator part;
a rod part extending from the actuator part through the connection part and linearly reciprocating according to the driving of the actuator part;
a transfer unit disposed in a linear reciprocating manner inside the connecting unit so as to be drawn into the connecting unit or drawn out of the connecting unit in conjunction with the rod unit; and
and a support part coupled to one side of the transfer part to selectively support the workpiece clamped to the main spindle.
3. The method of claim 2,
A workpiece support device for a machine tool, characterized in that when supporting the workpiece clamped to the main spindle, the support force of the work piece is adjusted by adjusting the feed amount of the sub spindle in real time according to a change in the load amount caused by the feed of the sub spindle.
3. The method of claim 2,
When the support unit supports the workpiece clamped on the main spindle, according to the change in the load amount of the support part, the support part is additionally linearly moved separately from the linear movement of the rod part to adjust the bearing force of the workpiece in real time. The workpiece support of the machine.
5. The method of claim 3 or 4,
The support part,
a housing unit coupled to one side of the transmission unit;
a base portion disposed to be linearly reciprocally movable inside the housing portion so as to be drawn into the housing portion or drawn out of the housing portion; and
and a tip part which is detachably coupled to one side of the base part to contact and support the workpiece clamped to the main spindle.
6. The method of claim 5,
The base part,
a piston unit disposed to be linearly reciprocating within the housing unit;
a flange portion protruding from a portion of the piston portion; and
A workpiece support device for a machine tool comprising a; shaft portion inserted and installed in the piston portion so as to be rotatable with respect to the piston portion.
7. The method of claim 6,
The housing part,
A step portion formed to be stepped on the inside of the housing portion so as to be in contact with the flange portion during the linear reciprocating movement of the piston portion to limit the linear reciprocating distance of the piston portion;
7. The method of claim 6,
The support part,
and a flow path part formed through the housing part to linearly reciprocate the piston part to introduce or outflow fluid into the housing part.
7. The method of claim 6,
The support unit is
a bearing part disposed between the piston part and the shaft part; and
and a cap part detachably coupled and installed to one side of the housing part.

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