Workpiece support device of machine tool

Abstract

The present invention relates to a workpiece support device for a machine tool for supporting a large workpiece having a receiving portion formed through or indented, wherein the workpiece support device comprises: a base unit on which the workpiece is seated; and a determining unit that is received in the receiving portion while the workpiece is seated on the base unit; wherein the determining unit sets the workpiece on the base unit based on the receiving portion by selectively changing the position in which the receiving portion is positioned in the base unit in correspondence with the shape and position of one or more receiving portions formed on the workpiece.

Description

Technology Field

[0001] The present invention relates to a workpiece support device for a machine tool, and more specifically, to a workpiece support device for a machine tool in which a workpiece is set on a base unit based on a receiving portion by selectively changing the position of a determination unit disposed on a base unit in correspondence with the shape and position of the receiving portion, so as to enable precision machining by firmly and accurately supporting various types of large workpieces having a receiving portion formed through or indented. Background Technology

[0003] Generally, a machine tool refers to a machine used for the purpose of processing metal or non-metal workpieces into a desired shape and dimensions using a suitable tool through various cutting or non-cutting methods.

[0004] Various types of machine tools, including turning centers, vertical / horizontal machining centers, gantry machining centers, Swiss turns, electrical discharge machining machines, horizontal NC boring machines, and CNC lathes, are widely used in various industrial sites to suit the specific tasks of the operation.

[0005] In general, various types of machine tools currently in use are equipped with control panels that utilize numerical control (NC) or computerized numerical control (CNC) technology. These control panels are equipped with various function switches or buttons and monitors.

[0006] In addition, the machine tool is equipped with a table on which the raw material serving as the workpiece is placed and which is transported for processing the workpiece, a pallet for preparing the workpiece before processing, a spindle on which the tool or workpiece is combined and rotates, a tailstock for supporting the workpiece during processing, a vibration dampener, etc.

[0007] Workpieces that are the target of processing for machine tools can be broadly classified into four types. First, there are large workpieces with an external focus, such as a bed, which refers to a large, heavy workpiece where the external shape of the workpiece becomes the important processing surface.

[0008] The second refers to small to medium-sized workpieces with an external shape focus, such as columns or saddles, where the external shape of the workpiece serves as the critical machining surface.

[0009] Thirdly, it refers to a small-to-medium-sized internal center workpiece, such as a small head, which is a small workpiece equipped with a receiving portion that penetrates or is embedded in the workpiece, and the portion where such a receiving portion is formed becomes the important machined surface.

[0010] Fourth, it refers to a medium-to-large internal workpiece, such as a heavy workpiece like a large head or rotary body, equipped with a receiving portion that penetrates or is recessed into the workpiece, wherein the portion where this receiving portion is formed becomes the critical machined surface.

[0011] When setting a workpiece on a support device for precision machining of a workpiece, in the first and second cases among the four types described above, the workpiece can be set by positioning it based on the outer shape because the outer shape is an important machining surface, and in the third case, since it is small, the workpiece can be set by pressing the inner shape against it.

[0012] Referring to FIG. 1, conventionally, especially in the fourth case (large-sized workpiece with an inner center), the position where the workpiece is placed is determined based on the outer shape of the workpiece (2), that is, sides A and B in FIG. 1, and then the workpiece is set in a workpiece support device to perform processing of the workpiece.

[0013] However, in the case of medium-to-large workpieces centered on the inner shape, there was a problem in that the position where the workpiece is set is determined based on the outer shape (A, B) of the workpiece, even though the important processing surface is the inner shape of the workpiece, that is, the receiving part (3, 4) formed in the workpiece, and thus the position of the workpiece is not reflected in the shape of the inner shape of the workpiece.

[0014] In addition, when the machining allowance of the raw material is uneven, if the inner shape of the workpiece where the receiving portion is formed—that is, the inner surface of the workpiece where the receiving portion is formed—is machined, it becomes under-machined or, conversely, over-machined, resulting in a problem where the machining cannot be performed precisely. Prior art literature

[0016] Republic of Korea Registered Patent No. 10-1861105 The problem to be solved

[0017] The present invention aims to solve the above-mentioned problems. The objective of the present invention is to provide a workpiece support device for a machine tool that allows for precision machining by firmly and accurately supporting a large workpiece having a receiving portion formed through or indented, based on the receiving portion which is an important processing part of the workpiece, and by selectively changing the position of a determination unit placed on the base unit in correspondence with the shape and position of the receiving portion formed in various ways depending on the type of workpiece, thereby conveniently supporting various types of workpieces at an accurate position, increasing the work efficiency of the operator, and minimizing non-processing time. means of solving the problem

[0019] To achieve the objective of the present invention, a workpiece support device for a machine tool according to the present invention is a workpiece support device for a machine tool having a receiving portion formed by penetration or indentation, wherein the workpiece support device comprises: a base unit on which the workpiece is seated; and a determination unit that is received in the receiving portion while the workpiece is seated on the base unit; wherein the determination unit can set the workpiece on the base unit based on the receiving portion by selectively changing the position in which it is placed in the base unit in correspondence with the shape and position of the receiving portion formed in one or more places on the workpiece.

[0020] In addition, in another preferred embodiment of the workpiece support device of the machine tool according to the present invention, the determination unit may include: one or more mounting portions formed on the base unit; one or more center guide portions detachably coupled to the mounting portions; and a detachment prevention portion that prevents the center guide portions from detaching from the mounting portions.

[0021] In addition, in another preferred embodiment of the workpiece support device of the machine tool according to the present invention, the center guide portion may each include: a body portion installed in the mounting portion; a vertical portion formed to extend vertically on the upper part of the body portion; a lifting / lowering portion inserted and installed in the vertical portion to move up and down along the vertical portion; an elastic portion disposed between the body portion and the lifting / lowering portion to elastically support the lifting / lowering portion; and one or more push portions that slide in contact with the inner surface of the workpiece where the receiving portion is formed when the workpiece is seated on the base unit to pressurize and support the workpiece.

[0022] In addition, in another preferred embodiment of the workpiece support device of the machine tool according to the present invention, the push portion may each include: a sliding portion having one side pivotally coupled to the vertical portion; and a connecting portion having one side pivotally coupled to the sliding portion and the other side pivotally coupled to the lifting / lowering portion, thereby raising / lowering the lifting / lowering portion in conjunction with the pivoting motion of the sliding portion.

[0023] In addition, in another preferred embodiment of the workpiece support device of the machine tool according to the present invention, the base unit may include: a base portion; a rotate portion rotatably coupled to the base portion; and a stopper portion for limiting the rotation angle of the rotate portion.

[0024] In addition, in another preferred embodiment of the workpiece support device of the machine tool according to the present invention, each of the mounting portions is formed in a circular manner in multiple numbers on the rotating portion or is formed to extend radially from the center of the receiving portion on the rotating portion, and the method of joining the mounting portion and the body portion may be changed in correspondence with the shape of the mounting portion.

[0025] In addition, in another preferred embodiment of the workpiece support device of the machine tool according to the present invention, when each of the mounting portions is formed in a circular shape in the rotating portion, the body portion can be inserted into one of the plurality of circular shapes formed in the mounting portion, and then the body portion is rotated so that a part of the body portion is caught in the anti-detachment portion, thereby allowing the body portion to be coupled to the mounting portion.

[0026] In addition, in another preferred embodiment of the workpiece support device of the machine tool according to the present invention, when each of the mounting portions is formed to extend radially with respect to the center of the receiving portion of the rotating portion, the body portion may be installed by being coupled to the mounting portion through a pin that penetrates the body portion and is coupled to one of a plurality of fastening holes formed in the mounting portion.

[0027] In addition, in another preferred embodiment of the workpiece support device of the machine tool according to the present invention, the stopper portion may include: a catch portion protruding from a part of the rotate portion; and a pair of catch projection portions extending vertically and parallel to the catch portion on the base portion so as to catch the catch portion according to the rotational direction of the rotate portion.

[0028] In addition, in another preferred embodiment of the workpiece support device of the machine tool according to the present invention, the base unit may further include a confirmation unit having an indicator formed on the locking part to check the angle at which the rotate part has rotated, and a display part formed on the base part adjacent to the indicator.

[0029] In addition, in another preferred embodiment of the workpiece support device of the machine tool according to the present invention, it may further include one or more clamping parts installed on the base unit, wherein the portion contacting the workpiece is formed by knurling to support or clamp the workpiece. Effects of the invention

[0031] The workpiece support device of the machine tool according to the present invention has the effect of enabling precision machining by firmly and accurately supporting the workpiece, thereby preventing problems such as instability or damage to the wooden mold during the casting process of large workpieces, particularly those having a receiving portion formed through or indented, in the state of a cast raw material, where it is difficult to expect uniform quality dimensions, and furthermore, when determining the machining position of such raw material based on the outer shape of the workpiece as in the conventional method, the inner shape, that is, the receiving portion, is over-cut or under-cut, so as to prevent the machining precision from decreasing.

[0032] In addition, the workpiece support device of the machine tool according to the present invention has a structure in which, when a workpiece having a receiving portion formed by a push portion is seated on the base unit, the sliding portion of the push portion slides in contact with the inner surface of the workpiece having the receiving portion formed, thereby pressurizing and supporting the workpiece; that is, a structure in which the movement of the lifting and lowering portion, which is elastically supported by the elastic portion and the pivoting structure of the sliding portion and the connecting portion, is automatically performed. By firmly seating the workpiece based on the receiving portion of the workpiece, stable machining of the same quality can be repeatedly performed even if there is a deviation in the machining allowance, thereby improving the quality of the workpiece and enhancing the stability and reliability of the machine tool.

[0033] In addition, the workpiece support device of the machine tool according to the present invention determines the position of the workpiece based on the outer shape of the workpiece as in the conventional method, and in addition, if the machining allowance of the raw material is uneven (biased), the tool is overloaded, causing the tool to break or the workpiece to be damaged and the raw material to be discarded. By determining the position based on the inner shape of the workpiece where the receiving portion is formed and performing machining at an accurate position, the tool is prevented from breaking and machining is performed. This prevents damage to the workpiece and promotes uniform machining based on the inner shape of the workpiece, thereby preventing damage to the workpiece and reducing machining costs.

[0034] Furthermore, the workpiece support device of the machine tool according to the present invention has a determination unit formed in various forms such that the center guide part's push part is formed with one or more push parts, for example, one or three push parts, and can be applied to various types of receiving parts by optimally combining and applying them according to the diameter of the receiving part. In addition, the center guide part can be selectively changed so that it is positioned on the base unit in correspondence with the shape and position of the receiving part formed in various ways depending on the type of workpiece, thereby conveniently supporting various types of workpieces at an accurate position and increasing the work efficiency of the operator.

[0035] In addition, the workpiece support device of the machine tool according to the present invention has the effect of preventing vibration of the machine tool during processing or the workpiece from being pushed due to overload, as the clamping part that supports or clamps the workpiece is formed with a knurling process at the part that contacts the workpiece, thereby increasing the frictional force with the workpiece.

[0036] In addition, the workpiece support device of the machine tool according to the present invention has a structure in which a rotating part is rotatably coupled to a base part and a workpiece is seated on the upper part of the rotating part, so that the workpiece can be quickly set based on the centerline when setting the workpiece, thereby having the effect of minimizing non-processing time by reducing the workpiece setting time. Brief explanation of the drawing

[0038] FIG. 1 shows a conceptual diagram of the workpiece setting criteria of a workpiece support device of a conventional machine tool. FIG. 2 shows a workpiece mounted on a workpiece support device of a machine tool according to one embodiment of the present invention. FIG. 3 shows a perspective view of a workpiece support device of a machine tool according to an embodiment of the present invention. FIG. 4 shows a perspective view of FIG. 2 with the determination unit and the clamping part removed. FIG. 5 shows an enlarged view of part C in FIG. 4. FIG. 6 shows a perspective view of a center guide part of a workpiece support device of a machine tool according to an embodiment of the present invention. FIG. 7 shows a side view of a center guide part of a workpiece support device of a machine tool according to an embodiment of the present invention. FIG. 8 shows a perspective view of a center guide part when there are multiple push parts of a workpiece support device of a machine tool according to an embodiment of the present invention. FIG. 9 is a drawing showing the state in which a center guide part is coupled to a mounting part when a mounting part is formed to extend radially with respect to the center of a receiving part in a rotating part. FIG. 10 is a drawing showing the process of a center guide part being coupled to a mounting part when a mounting part is formed in a circular shape in a rotating part. Specific details for implementing the invention

[0039] Hereinafter, a workpiece support device of a machine tool according to an embodiment of the present invention will be described in detail with reference to the drawings. The embodiments introduced below are provided as examples to ensure that the concept of the present invention is 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. Also, in the drawings, the size and thickness of the device, etc., may be exaggerated for convenience. Throughout the specification, the same reference numerals indicate the same components.

[0040] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity of description.

[0041] The terms used herein are for describing embodiments and are therefore not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used in this specification, "comprise" and / or "comprising" do not exclude the presence or addition of one or more other components, steps, actions, and / or elements to the mentioned components, steps, actions, and / or elements.

[0042] FIG. 1 shows a conceptual diagram of the workpiece setting standard of a workpiece support device of a conventional machine tool, and FIG. 2 shows a workpiece mounted on a workpiece support device of a machine tool according to one embodiment of the present invention.

[0043] FIG. 3 shows a perspective view of a workpiece support device of a machine tool according to one embodiment of the present invention, and FIG. 4 shows a perspective view of FIG. 2 with the determination unit and the clamping part removed.

[0044] FIG. 5 shows an enlarged view of part C in FIG. 4, and FIG. 6 shows a perspective view of a center guide part of a workpiece support device of a machine tool according to one embodiment of the present invention.

[0045] FIG. 7 and FIG. 6 show a side view of a center guide portion of a workpiece support device of a machine tool according to one embodiment of the present invention, and FIG. 8 shows a perspective view of a center guide portion when there are multiple push portions of a workpiece support device of a machine tool according to one embodiment of the present invention.

[0046] FIG. 9 is a drawing showing the state in which the center guide part is coupled to the mounting part when the mounting part is formed to extend radially with respect to the center of the receiving part in the rotating part, and FIG. 10 is a drawing showing the process of the center guide part being coupled to the mounting part when the mounting part is formed in a circular shape in the rotating part.

[0047] A workpiece support device (1) of a machine tool according to an embodiment of the present invention will be described with reference to FIGS. 2 to 10. As shown in FIGS. 2 to 10, the workpiece support device (1) of a machine tool according to an embodiment of the present invention includes a base unit (100), a determination unit (200), and a clamping part (300).

[0048] A base unit (100) of a workpiece support device (1) of a machine tool according to one embodiment of the present invention serves to support a workpiece (2) on which it is placed, and constitutes the lower part of the workpiece support device.

[0049] Referring to FIG. 2, a workpiece (2) that is seated on a workpiece support device (1) of a machine tool according to one embodiment of the present invention can be formed in various ways, and in particular, it is a support device for supporting a large, heavy workpiece, that is, a workpiece (2) with an inner center, that is, a workpiece in which the part where the support part is formed becomes an important surface for processing.

[0050] The workpiece (2) can be formed with various external shapes, and the receiving portions (3, 4) formed can also be made of various shapes and numbers.

[0051] Specifically, the receiving portion can be divided into a large diameter (about 280 to 600 mm) (3) and a small diameter (about 150 to 300 mm) (4), and the crystal unit (200) can be modified in various ways depending on the diameter of the receiving portion.

[0052] Referring to FIGS. 3 and 4, the base unit (100) of the workpiece support device (1) of a machine tool according to one embodiment of the present invention specifically includes a base part (110), a rotate part (120), a stopper part (130), and a verification part (140).

[0053] The base portion (110) of the base unit (100) may be fixedly installed on the bed or pallet of a machine tool, although it is not shown in the drawing.

[0054] The rotation part (120) of the base unit (100) is rotatably coupled to the base part, and a mounting part (210) is formed on the upper part, and a center guide part (220) and an anti-detachment part (230) are installed.

[0055] Thus, the workpiece support device of the machine tool according to the present invention has a structure in which a rotating part is rotatably coupled to a base part and a workpiece is seated on the upper part of the rotating part, allowing the workpiece to be set quickly based on a centerline when setting the workpiece, thereby minimizing non-processing time by reducing the workpiece setting time.

[0056] Referring to FIGS. 4 and 5, the stopper portion (130) of the base unit (100) is intended to limit the rotation angle of the rotate portion and specifically includes a catch portion (131) and a catch projection portion (132).

[0057] The catch portion (131) is formed protruding from a part of the rotate portion (120), and the catch portion (132) is formed as a pair and is formed to extend vertically (upward direction) parallel to the catch portion (131) of the base portion (110) so that the catch portion (131) is caught according to the rotation direction (i.e., clockwise or counterclockwise) of the rotate portion (120).

[0058] As such, the stopper part of the base unit of the workpiece support device (1) of the machine tool according to one embodiment of the present invention limits the angle at which the rotate part rotates so that the rotate part rotates only within the range necessary to quickly set the workpiece based on the centerline, thereby preventing the heavy workpiece from being excessively rotated, thereby threatening the safety of the operator or the workpiece from falling and being damaged.

[0059] Referring to FIGS. 4 and 5, the verification part (140) of the base unit (100) is for verifying the angle at which the rotate part (120) has rotated and includes an indicator part (141) formed on the locking part (131) and a display part (142) formed on the base part (110) adjacent to the indicator part (141).

[0060] That is, the indicator part acts as a scale, and the display part can indicate the rotated angle or the limit line on which the rotate part can be rotated.

[0061] As such, the verification part of the base unit of the workpiece support device (1) of the machine tool according to one embodiment of the present invention can indicate the angle at which the rotate part is rotated or the limit line at which it can be rotated, thereby preventing the operator from excessively rotating the rotate part in advance and improving work convenience.

[0062] A determination unit (200) of a workpiece support device (1) of a machine tool according to one embodiment of the present invention is received in a receiving portion (3, 4) while the workpiece (2) is seated on a base unit (100).

[0063] Referring to FIGS. 3 to 10, the determination unit (200) specifically includes a mounting part (210), a center guide part (220), and an anti-detachment part (230).

[0064] The mounting portion (210) of the decision unit (200) can be formed with one or more base units (100), that is, one or multiple units, and is a part that is coupled to the center guide portion.

[0065] Although not necessarily limited to this, the mounting portion (210) may be formed by being recessed into the rotating portion (120) or protruding from the rotating portion (120) so as to accommodate the body portion (221) of the center guide portion (220).

[0066] The center guide portion (220) of the decision unit (200) can be made of one or more, that is, one or multiple, and is detachably coupled to the mounting portion (210).

[0067] That is, the center guide part (220) can be inserted and coupled to a selected mounting part (210) among a plurality of mounting parts (210) so that it can be accurately received at the center (D) of the receiving part according to the shape of the receiving part (3, 4) of the workpiece, particularly the diameter or formed position of the receiving part, or can be moved in a straight reciprocating motion along the mounting part (210).

[0068] Specifically, the center guide section (220) includes a body section (221), a vertical section (222), a lifting / lowering section (223), an elastic section (224), and a pushing section (225).

[0069] The body part (221) is installed on the mounting part (210) and is the lower part of the center guide part, and the vertical part (222) is formed to extend vertically (in the Z-axis direction of FIGS. 6 to 8) on the upper part of the body part (221) and serves as a column.

[0070] Additionally, the lifting / lowering member (223) is installed by being inserted into the vertical member (222) so as to be lifted / lowered along the vertical member (222), and the elastic member (224) is positioned between the body member (221) and the lifting / lowering member (223) to elastically support the lifting / lowering member (223). The elastic member may be installed by housing the vertical member, or it may be installed separately on the outside of the vertical member.

[0071] The push portion (225) can be one or more, that is, one or multiple, and when the workpiece (2) is seated on the base unit (100), it slides in contact with the inner surface of the workpiece (2) where the receiving portion (3, 4) is formed, thereby serving to pressurize and support the workpiece (2).

[0072] Each of the push sections (225) includes a sliding section (226) which has one side pivotally connected to a vertical section (222), and a connecting section (227) which has one side pivotally connected to the sliding section (226) and the other side pivotally connected to a lifting / lowering section (223), thereby raising / lowering the lifting / lowering section (223) in conjunction with the pivoting movement of the sliding section (226).

[0073] The anti-detachment part (230) of the decision unit (200) can be made of one or more, that is, one or multiple, and is intended to prevent the center guide part (220) from detaching from the mounting part (210).

[0074] As shown in FIGS. 3, 4, 9 and 10, the anti-detachment part (230) is installed to cover a part of the mounting part (210) and is formed to be caught on the anti-detachment part so that when the body part (221) of the center guide part (220) is received in the mounting part (210), the body part is not detached from the mounting part.

[0075] A determination unit (200) of a workpiece support device (1) of a machine tool according to one embodiment of the present invention can set the workpiece (2) in the base unit (100) based on the receiving portions (3, 4) by selectively changing the position in which the workpiece (2) is placed in the base unit (100) in correspondence with the shape and position of one or more receiving portions (3, 4) formed in the workpiece (2).

[0076] That is, the receiving portions (3, 4) formed in one or more places on the workpiece (2) can be divided into cases where the diameter is large and cases where it is small, as described above. In this case, through the method of combining the center guide portion and the mounting portion described later, the center guide portion is received at the center (D) of the receiving portion, and the push portion of the center guide portion uniformly presses the inner surface of the workpiece where the receiving portion is formed, so that the workpiece (2) can be set on the base unit (100) based on the receiving portions (3, 4).

[0077] Referring to FIGS. 3, 6, 7, and 9, specifically, for example, when the diameter of the receiving portion is large (about 280 to 600 mm) (3), three center guide portions, each equipped with one push portion (225), are arranged at an even 120° interval on mounting portions (212) formed radially with respect to the center (D) of the receiving portion, and all three center guide portions can be received in the receiving portion (3).

[0078] In this case, as described below, the positions of the three center guide parts can be conveniently changed so that the sliding part of the push portion of each center guide part contacts the inner surface of the workpiece where the receiving portion is formed, thereby elastically pressing the inner surface of the workpiece where the receiving portion is formed.

[0079] Referring to FIGS. 3, FIGS. 8, and FIGS. 10, specifically, for example, when the diameter of the receiving portion is small (about 150 to 300 mm) (4), each receiving portion (4) is equipped with three push portions (225) and each center guide portion is provided, and the center guide portion can be mounted on a circular mounting portion (211).

[0080] In this case, as described below, the position of the center guide part can be conveniently changed so that the sliding parts of the three push parts of the center guide part are arranged to come into contact with the inner surface of the workpiece where the receiving part is formed, thereby elastically pressing the inner surface of the workpiece where the receiving part is formed.

[0081] As such, the workpiece support device of the machine tool according to the present invention enables precision machining by firmly and accurately supporting the workpiece, thereby preventing problems such as instability or damage to the wooden mold during the casting process of large workpieces, particularly those having a receiving portion formed through or indented, in the state of a cast raw material, where it is difficult to expect uniform quality dimensions, and furthermore, when determining the machining position based on the outer shape of the workpiece as in the conventional method, the inner shape, that is, the receiving portion, is over-cut or under-cut, so as not to occur, the workpiece is set on the base unit based on the receiving portion, which is an important machining part of the workpiece.

[0082] In addition, each mounting portion (210) of the determination unit (200) of the workpiece support device (1) of the machine tool according to one embodiment of the present invention may be formed in a circular shape (211) in the rotation portion (120) or formed radially extending (212) with respect to the center (D) of the receiving portion in the rotation portion (120).

[0083] In addition, the body portion (221) of the center guide portion (220) that is selectively coupled to each mounting portion (210) may have a method of coupling between the mounting portion (210) and the body portion (221) that corresponds to the shape of the mounting portion (210).

[0084] Referring to FIG. 10, we first examine the case where the mounting portion (210) is formed in a circular shape (211) on the rotating portion (120). (For example, this can be applied when the diameter of the receiving portion is small (about 150 to 300 mm) (4).)

[0085] When each mounting part (210) is formed in a circular shape (211) on the rotating part,

[0086] The mounting portion is formed in a circular shape (211), and as described above, a part of the mounting portion is covered by a detachment prevention portion.

[0087] In this case, the shape of the body part is formed to correspond to the shape of the part excluding the portion covered by the anti-detachment part from the shape of the mounting part.

[0088] Accordingly, when the body part (221) is inserted into one of the plurality of circular parts formed in the mounting part (211) and the body part (221) is rotated, a part of the body part (221) is caught on the anti-detachment part (230).

[0089] In this way, when each mounting part (210) is formed in a circular shape (211) on the rotating part (120), the body part (221) can be conveniently attached and detached from the mounting part by inserting the body part (221) vertically into the mounting part and then rotating it.

[0090] In addition, the position of the center guide can be conveniently changed so that the center guide is positioned at a desired location as needed by attaching and detaching the mounting part to one or more of the selected mounting parts among the multiple mounting parts (211).

[0091] Referring to FIG. 9, we examine the case where the mounting portion (212) is formed to extend radially from the center (D) of the receiving portion to the rotating portion (120). (For example, this can be applied when the diameter of the receiving portion is large (approx. 280 to 600 mm) (3).)

[0092] In the case where each mounting portion (212) is formed to extend radially with respect to the center (D) of the receiving portion in the rotating portion (120),

[0093] The mounting portion is formed to extend radially with respect to the center (D) of the receiving portion, and as described above, a part of the mounting portion is covered by the anti-detachment portion.

[0094] In this case, the body part (221) is provided with a stepped portion (2211) formed with a step, and the shape of the body part is formed to correspond to the shape of the mounting part.

[0095] That is, the body part is inserted into the mounting part that is formed by extending radially with respect to the center (D) of the receiving part, and is received in a state where it is not detached by the anti-detachment part.

[0096] In this state, if the body part (221) is moved in a straight line along the mounting part (212), the position of the center guide part can be changed.

[0097] Additionally, the body portion (221) can be installed by being coupled to the mounting portion through a pin (214) that penetrates the body portion (221) and is coupled to one of the plurality of fastening holes (213) formed in the mounting portion (210).

[0098] That is, the body part can be conveniently connected to the mounting part by moving the body part in a straight line along the mounting part to the desired position and then inserting a pin (214) through the through hole (2212) formed in the body part and the fastening hole (213) formed in the mounting part.

[0099] In this way, when each mounting part (212) is formed to extend radially with respect to the center (D) of the receiving part, the body part can be conveniently attached to and detached from the mounting part by inserting or removing a pin (214) through the through hole (2212) formed in the body part and the fastening hole (213) formed in the mounting part.

[0100] In addition, if each mounting part (212) is formed to extend radially based on the center (D) of the receiving part, the body part (221) is inserted into the mounting part, and then the body part (221) is moved in a straight line along the mounting part (212) so that the center guide part can be conveniently positioned at a desired location as needed.

[0101] Thus, in the case where each mounting part is formed in a circular shape in the rotating part, the body part can be conveniently attached and detached from the mounting part by inserting the body part vertically into the mounting part and then rotating it; and in the case where the mounting part is formed extending radially from the center of the receiving part, the body part can be conveniently attached and detached from the mounting part by inserting or removing a pin through a through hole and a fastening hole formed in the mounting part.

[0102] In addition, if each mounting part is formed in a circular shape on the rotating part, the position of the center guide part can be conveniently changed by attaching and detaching the mounting part to one or more of the selected mounting parts among the multiple mounting parts so that the center guide part is positioned at a desired location as needed. If the mounting part is formed by extending radially from the center of the receiving part, or if it is formed on the body part, the position of the center guide part can be conveniently changed by inserting the body part into the mounting part and then moving the body part in a straight line along the mounting part so that the center guide part is positioned at a desired location as needed.

[0103] One or more clamping parts (300) of a workpiece support device (1) of a machine tool according to one embodiment of the present invention may be installed, and a part that contacts the workpiece to support or clamp the workpiece may be formed by knurling.

[0104] As such, the workpiece support device of the machine tool according to the present invention can prevent vibration of the machine tool or the workpiece from being pushed due to overload during processing by increasing the frictional force with the workpiece through the clamping part that supports or clamps the workpiece and the part that contacts the workpiece being formed by knurling.

[0105] The operating principle of the workpiece support device (1) of a machine tool according to one embodiment of the present invention is explained. First, the process of the workpiece (2) being seated on the workpiece support device is explained.

[0106] When moving the workpiece (2) from the top to the bottom to place it on the base unit (100), the sliding part (226) comes into contact with the receiving part (3, 4) of the workpiece (2), and the sliding part (226) rotates downward.

[0107] When the sliding part (226) rotates downward, the connecting part (227) also rotates in conjunction with the rotational movement of the sliding part (226), thereby lowering the lifting / lowering part (223) connected to the connecting part (227).

[0108] When the lifting / lowering part (223) lowers, the lifting / lowering part (223) presses the elastic part (224), so the elastic force of the elastic part (224) pressing the lifting / lowering part (223) in an upward direction acts on the sliding part.

[0109] Through this, the receiving portion (3, 4) of the workpiece (2) is firmly elastically pressed and supported by the sliding portion (226), and the workpiece is set on the base unit based on the receiving portion, thereby enabling the workpiece to be firmly and accurately supported.

[0110] Next, the process of removing the workpiece (2) from the workpiece support device is explained in the opposite way to the process of the workpiece being seated described above.

[0111] In this way, the workpiece support device of a machine tool according to the present invention has a structure in which, when a workpiece having a receiving portion formed by a push portion is seated on a base unit, the sliding portion of the push portion slides in contact with the inner surface of the workpiece having a receiving portion formed thereon to pressurize and support the workpiece; that is, a structure in which the operation of the lifting and lowering portion elastically supported by the sliding portion and the connecting portion is automatically performed, thereby firmly seating the workpiece based on the receiving portion of the workpiece, so that stable processing of the same quality can be repeatedly performed even if there is a deviation in the processing allowance, thereby improving the quality of the workpiece and enhancing the stability and reliability of the machine tool.

[0112] Although the detailed description of the present invention described above has been explained with reference to preferred embodiments of the invention, those skilled in the art or those with ordinary knowledge in the relevant technical field will understand that various modifications and changes can be made to the present invention without departing from the spirit and technical scope of the invention as set forth in the claims below. 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 determined by the claims. Explanation of the symbols

[0114] 1 : Workpiece support device of a machine tool 2 : Workpiece 3: Receiving part with a large diameter of the workpiece 4: Receiving part with a small diameter of the workpiece 100 : Base unit 110 : Base section 120 : Rotate section 130 : Stopper part 140 : Confirmation section 200 : Decision Unit 210 : Mounting part 220 : Center Guide Section 230 : Anti-detachment part 300 : Clamping part

Claims

Claim 1 A workpiece support device of a machine tool for supporting a large workpiece having a receiving portion formed by penetration or indentation, wherein the workpiece support device comprises: a base unit on which the workpiece is seated; and a determination unit received in the receiving portion while the workpiece is seated on the base unit; wherein the determination unit comprises: one or more mounting portions formed on the base unit; one or more center guide portions detachably coupled to the mounting portions; and a detachment prevention portion that prevents the center guide portions from detaching from the mounting portions; wherein each of the center guide portions comprises: a body portion installed on the mounting portion; a vertical portion extending vertically from the upper part of the body portion; a lifting / lowering portion inserted and installed in the vertical portion to move up and down along the vertical portion; and an elastic portion disposed between the body portion and the lifting / lowering portion to elastically support the lifting / lowering portion. A workpiece support device for a machine tool comprising: one or more push members that slide in contact with the inner surface of the workpiece where the receiving portion is formed when the workpiece is seated on the base unit and pressurize and support the workpiece; wherein the determining unit sets the workpiece on the base unit based on the receiving portion by selectively changing the position in which the workpiece is placed on the base unit in correspondence with the shape and position of the receiving portion formed on the workpiece. Claim 2 delete Claim 3 delete Claim 4 A workpiece support device for a machine tool according to claim 1, wherein each of the push members comprises: a sliding member, one side of which is pivotally coupled to the vertical member; and a connecting member, one side of which is pivotally coupled to the sliding member and the other side of which is pivotally coupled to the lifting / lowering member, thereby raising / lowering the lifting / lowering member in conjunction with the pivoting movement of the sliding member. Claim 5 A workpiece support device for a machine tool according to claim 4, wherein the base unit comprises: a base portion; a rotate portion rotatably coupled and installed to the base portion; and a stopper portion for limiting the rotation angle of the rotate portion. Claim 6 A workpiece support device for a machine tool according to claim 5, wherein each of the mounting portions is formed in a circular manner in multiple numbers on the rotating portion or is formed to extend radially from the center of the receiving portion on the rotating portion, and the body portion is characterized in that the method of joining the mounting portion and the body portion is changed in correspondence with the shape of the mounting portion. Claim 7 A workpiece support device for a machine tool according to claim 6, characterized in that, when each of the above-mentioned mounting parts is formed in a circular shape on the above-mentioned rotating part, the body part is inserted into one of the plurality of circular shapes formed on the above-mentioned mounting part, and the body part is rotated so that a part of the body part catches on the above-mentioned anti-detachment part, thereby coupling the body part to the above-mentioned mounting part. Claim 8 A workpiece support device for a machine tool, characterized in that, in the case where each of the above-mentioned mounting portions is formed to extend radially with respect to the center of the above-mentioned receiving portion in the above-mentioned rotating portion, the body portion is coupled to the mounting portion through a pin that penetrates the body portion and is coupled to one of a plurality of fastening holes formed in the mounting portion. Claim 9 A workpiece support device for a machine tool according to claim 5, wherein the stopper part comprises: a catch portion formed protruding from a part of the rotate part; and a pair of catch projection portions formed extending vertically and parallel to the catch portion on the base part so as to catch the catch portion according to the rotational direction of the rotate part. Claim 10 A workpiece support device for a machine tool according to claim 9, wherein the base unit further comprises a confirmation unit having an indicator formed on the locking part to check the angle at which the rotation part has rotated, and a display part formed on the base part adjacent to the indicator. Claim 11 A workpiece support device of a machine tool, further comprising, in claim 1, one or more clamping parts installed on the base unit, wherein the portion contacting the workpiece is formed by knurling to support or clamp the workpiece.

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