Machine tool transfer device and machine tool transfer method

Abstract

The present invention relates to a machine tool transfer device and a machine tool transfer method. The machine tool transfer device comprises: a bed; a plurality of structures movably arranged on the bed; and a transfer unit arranged on the bed to transfer the plurality of structures, and detachably coupled to any one of the plurality of structures to transfer the coupled structure.

Description

Machine tool transfer device and machine tool transfer method

[0001] The present invention relates to a transport device for a machine tool and a transport method for a machine tool, and more particularly, to a transport device for a machine tool and a transport method for a machine tool for transporting a structure by being detachably connected to any one of a plurality of structures.

[0002] In general, a machine tool refers to a machine used for the purpose of processing a metal / non-metal workpiece into a desired shape and size using an appropriate tool using various cutting or non-cutting processing methods.

[0003] Various types of machine tools, including turning centers, vertical / horizontal machining centers, gate-type machining centers, Swiss turns, electrical discharge machines, horizontal NC boring machines, and CNC lathes, are widely used in various industrial fields for their respective tasks.

[0004] Many types of machine tools in use today typically feature control panels utilizing numerical control (NC) or computerized numerical control (CNC) technology. These panels feature various function switches or buttons and a monitor.

[0005] In addition, the machine tool is equipped with a table on which the workpiece material is placed and transferred for processing the workpiece, a pallet for preparing the workpiece before processing, a spindle on which a tool or workpiece is combined and rotates, a tailstock for supporting the workpiece during processing, a vibration damper, etc.

[0006] Typically, in machine tools, the table, tool rest, spindle, tailstock, and oscillation unit are equipped with a transfer unit that moves along the transfer axis to perform various processing operations.

[0007] Additionally, machine tools generally use multiple tools for various processing operations, and tool magazines or turrets are used as tool storage spaces to store multiple tools.

[0008] Additionally, machine tools are generally equipped with an automatic tool changer (ATC) to retrieve or retract a specific tool from the tool magazine under the command of the numerical control unit in order to improve the productivity of the machine tool.

[0009] Additionally, machine tools are typically equipped with an automatic pallet changer (APC) to minimize downtime. The APC automatically exchanges pallets between the workpiece processing area and the workpiece installation area. Pallets can be loaded with workpieces.

[0010] Additionally, machine tools are broadly categorized into turning centers and machining centers based on their machining methods. Generally, turning centers rotate the workpiece, while machining centers process the workpiece with a rotating tool.

[0011] Generally, a machine tool capable of performing multiple machining processes, such as turning, milling, drilling, tapping, and boring, in a single workpiece step is called a multi-task center (or integrated mill turn center). Using such a multi-task center can reduce lead times, component counts, workloads, and workspace requirements, while also improving productivity and precision.

[0012] A turning center, also called a double lathe, is a device that processes a workpiece by rapidly rotating the workpiece mounted on the spindle and bringing the tool close to it.

[0013] In particular, the turning center may include a tailstock for fixedly supporting the free end of the workpiece.

[0014] In addition, in turning centers such as lathes, when machining workpieces such as long shafts, vibration is absorbed by the workpiece, preventing buckling and maintaining machining precision.

[0015] Depending on the type of processing being performed by the machine tool, a tailstock may be required, and in addition to the tailstock, additional structures (equipment) such as a vibration damper may also need to be placed within the machine tool.

[0016] Additionally, in order to improve processing precision, there are cases where it is necessary to move the structure so that the position of the structure being placed is correct.

[0017] In order to move the structure in this way, the transfer device of a conventional machine tool was in the form of a fixed ball screw nut that converts the rotational motion of a ball screw into linear motion and moves linearly.

[0018] A ball screw nut that moves in a straight line is assembled at the bottom of the structure and moves the structure by the rotation of the ball screw. However, since only one ball screw nut is configured for one ball screw, in order to move two or more structures, each ball screw and a motor to drive it had to be configured.

[0019] However, as in the case of the conventional machine tool transfer device, if only one ball screw nut is configured for one ball screw, a problem arose in that the application of multiple structures was limited due to space constraints.

[0020] For example, although both a steadiness rest and a tailstock must be used on a machine tool for machining, a problem has arisen in that only one of the steadiness rests and the tailstock must be selected and applied due to space constraints.

[0021] The present invention is intended to solve the above problems, and the purpose of the present invention is to provide a transport device for a machine tool and a transport method for a machine tool, which can overcome spatial limitations and improve user convenience and satisfaction by allowing a transport unit for transporting a structure to be detachably connected to any one of a plurality of structures and transporting the combined structure so that a plurality of structures can be applied to a machine tool.

[0022] In order to achieve the object of the present invention, a transport device of a machine tool according to the present invention may include a bed; a plurality of structures movably arranged on the bed; and a transport unit arranged on the bed to transport the plurality of structures, and detachably coupled to any one of the plurality of structures to transport the coupled structure.

[0023] In addition, in another preferred embodiment of the transport device of the machine tool according to the present invention, a control unit for controlling the operation of the transport unit and the plurality of structures may be further included.

[0024] In addition, in another preferred embodiment of the transport device of the machine tool according to the present invention, the plurality of structures may each include a base portion disposed on the bed; and a sensing portion disposed on a part of the base portion.

[0025] In addition, in another preferred embodiment of the transport device of the machine tool according to the present invention, the transport unit may include a screw unit extending longitudinally on the bed; a coupling unit selectively coupled to the structure, and a separation nut unit that moves linearly on the screw unit by rotation of the screw unit; and a dog unit arranged on the separation nut unit to detect the sensing unit.

[0026] In addition, in another preferred embodiment of the transport device of the machine tool according to the present invention, the plurality of structures further include a clamping unit that is arranged to be movable up and down on the base unit and selectively clamps or unclamps the bed and the transport unit;

[0027] When the clamping part is lowered under the control of the control unit, the clamping part and the bed can be unclamped, and the clamping part and the separation nut part can be clamped.

[0028] In addition, in another preferred embodiment of the transport device of the machine tool according to the present invention, when the clamping part is raised according to the control of the control part, the clamping part and the bed can be clamped, and the clamping part and the separation nut part can be unclamped.

[0029] In addition, in another preferred embodiment of the transport device of the machine tool according to the present invention, the control unit determines the transport order of the plurality of structures, and controls the operation of the separating nut unit according to the determined transport order to adjust the transport direction and transport amount of the separating nut unit so as to sequentially transport the plurality of structures.

[0030] In addition, in another preferred embodiment of the transport device of the machine tool according to the present invention, the control unit can transport the structure to be transported sequentially by limiting the transport amount of the structure to be transported in the next order to the maximum allowable transport amount range in order to prevent interference between the plurality of structures transported sequentially through the separation nut unit.

[0031] In addition, in another preferred embodiment of the transport device of the machine tool according to the present invention, the clamping portion may include a piston portion that is arranged to be able to be raised and lowered inside the base portion by pressure flowing in or out; a rod portion that is vertically extended so that one end is coupled to the piston portion to be able to be raised and lowered together with the piston portion inside the base portion, and the other end is formed to protrude outward from the base portion, and the other end is complementarily coupled to the coupling portion; and a brake pad portion that is coupled to the other end of the rod portion and is moved up and down in conjunction with the raising and lowering movement of the rod portion to selectively come into contact with a guide portion of the bed.

[0032] In addition, in another preferred embodiment of the transport device of the machine tool according to the present invention, the brake pad portion may include a main body portion to which the load portion is coupled; and a wing portion that is formed by bending downward along the width direction of the main body portion and extending thereto and is selectively coupled with the guide portion.

[0033] In addition, in another preferred embodiment of the transport device of the machine tool according to the present invention, the brake pad portion may be installed and coupled to the load portion so that the lower end of the load portion protrudes lower than the lower end of the main body portion.

[0034] In order to achieve the object of the present invention, a method for transporting a machine tool according to the present invention comprises the steps of: storing a processing program, information on each of the plurality of structures, a target position for each of the plurality of structures, and data on an approach restriction distance between adjacent structures among the plurality of structures, in order to transport a plurality of structures sequentially without interference between the plurality of structures by the operation of a separation nut unit; determining a transport order of the plurality of structures; moving the separation nut unit according to the determined transport order and stopping at a fixed position with respect to a priority structure; lowering a clamping unit of the priority structure to unclamp the priority structure from a bed and clamping it to the separation nut unit; moving a separation nut unit to which the priority structure is attached to transport the priority structure to a pre-stored target position; raising a clamping unit of the priority structure to clamp the priority structure from a bed and unclamp it from the separation nut unit; And it may include a step of moving only the separation nut part separated from the above-mentioned priority structure according to the decision transfer order and stopping at the correct position with respect to the next priority structure.

[0035] In addition, in another preferred embodiment of the method for transporting a machine tool according to the present invention, the movement distance of the separated separation nut part can be calculated at a step in which only the separated separation nut part moves and stops at a fixed position with respect to the next-order structure.

[0036] In addition, in another preferred embodiment of the transport method of the machine tool according to the present invention, after the step of moving only the separated separation nut part and stopping at a fixed position with respect to the next-order structure, the step of lowering the clamping part of the next-order structure to clamp the next-order structure to the separation nut part while unclamping the next-order structure from the bed; the step of converting the distance between the sensing parts of each of the adjacent structures among the plurality of structures into a distance using pre-stored data and a pre-stored access restriction distance; the step of calculating the maximum allowable transport amount range of the next-order structure using the pre-stored data, the conversion result, and the calculation result; the step of moving the separation nut part to which the next-order structure is attached so as to transport the next-order structure to a pre-stored target position within the calculated maximum allowable transport amount range of the next-order structure; the step of raising the clamping part of the next-order structure to clamp the next-order structure to the bed while unclamping the next-order structure to the separation nut part; And it may include a step of moving only the separation nut part separated from the above-mentioned structure according to the decision transfer order and stopping at the correct position for the next-order structure.

[0037] The transport device of a machine tool and the transport method of the machine tool according to the present invention have the effect of overcoming spatial constraints and improving user convenience and satisfaction by allowing a transport unit for transporting a structure to be detachably connected to any one of a plurality of structures and sequentially transporting the connected structures so that a plurality of structures can be applied to the machine tool.

[0038] In addition, the transfer device of a machine tool and the transfer method of a machine tool according to the present invention can clamp / unclamp between a structure and a transfer unit through a single operation without a complex operation of a clamping unit, and can clamp / unclamp between a structure and a bed, thereby having the effect of being able to transfer multiple structures quickly and conveniently.

[0039] Furthermore, the transfer device and transfer method of the machine tool according to the present invention have the effect of promoting stability and reliability of the machine tool by limiting the transfer amount of a structure to be transferred in the next order to the maximum allowable transfer amount range in order to prevent interference between a plurality of structures transferred sequentially.

[0040] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0041] Figure 1 shows an overall conceptual diagram of the transport device structure of a machine tool according to one embodiment of the present invention.

[0042] Figure 2 is a drawing showing the transport concept of the transport section of the transport device of a machine tool according to one embodiment of the present invention.

[0043] Figure 3 shows a state in which the structure and the separation nut portion of the transport device of a machine tool according to one embodiment of the present invention are clamped.

[0044] FIG. 4 shows a state in which the structure and bed of a transport device of a machine tool according to one embodiment of the present invention are unclamped and the structure and the separation nut portion are clamped.

[0045] Figure 5 shows the structure of a transport device of a machine tool according to one embodiment of the present invention and a state in which a separation nut portion is unclamped.

[0046] FIG. 6 shows a state in which the structure and bed of a transfer device of a machine tool according to one embodiment of the present invention are clamped and the structure and the separation nut part are unclamped.

[0047] FIGS. 7 to 9 are drawings showing a process of sequentially transporting a plurality of structures without interference between the plurality of structures by controlling the transport direction and transport amount of a separation nut portion of a transport device of a machine tool according to one embodiment of the present invention.

[0048] Figure 10 shows a procedure diagram of a transfer method of a machine tool according to one embodiment of the present invention.

[0049] Hereinafter, a transport device and a transport method for a machine tool according to an embodiment of the present invention will be described in detail with reference to drawings. The embodiments introduced below are provided as examples to ensure that those skilled in the art can sufficiently convey the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below and may be embodied in other forms. In addition, in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numbers represent like elements throughout the specification.

[0050] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below 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 only 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. Like reference numerals designate like elements throughout the specification. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of description.

[0051] The terminology used herein is for the purpose of describing embodiments and is therefore not intended to be limiting of the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise. As used herein, the terms "comprise" and / or "comprising" do not exclude the presence or addition of one or more other components, steps, operations, and / or elements mentioned.

[0052] Fig. 1 is a diagram showing an overall concept of a transport device structure of a machine tool according to one embodiment of the present invention. Fig. 2 is a diagram showing a transport concept of a transport section of a transport device of a machine tool according to one embodiment of the present invention.

[0053] Fig. 3 illustrates a state in which the structure and the separating nut portion of the transport device of a machine tool according to one embodiment of the present invention are clamped. Fig. 4 illustrates a state in which the structure and the bed of the transport device of a machine tool according to one embodiment of the present invention are unclamped and the structure and the separating nut portion are clamped.

[0054] Fig. 5 illustrates a state in which the structure and the separating nut portion of the transport device of a machine tool according to one embodiment of the present invention are unclamped. Fig. 6 illustrates a state in which the structure and the bed of the transport device of a machine tool according to one embodiment of the present invention are clamped and the structure and the separating nut portion are unclamped.

[0055] FIGS. 7 to 9 are drawings showing a process of sequentially transporting a plurality of structures without interference between the plurality of structures by controlling the transport direction and transport amount of a separation nut portion of a transport device of a machine tool according to one embodiment of the present invention.

[0056] Figure 10 shows a procedure diagram of a transfer method of a machine tool according to one embodiment of the present invention.

[0057] As illustrated in FIGS. 1 to 9, the transport device (1) of the machine tool according to the present invention is a device that can transport multiple structures through one transport unit by being detachably attached to the transport unit structure.

[0058] Specifically, the transfer device (1) of the machine tool according to the present invention includes a bed (100), a structure (200), a transfer unit (300), and a control unit (400).

[0059] The bed (100) of the transfer device (1) of the machine tool according to the present invention is installed on the ground or a base, and a structure (200) is arranged.

[0060] The structure (200) of the transfer device (1) of the machine tool according to the present invention may be composed of multiple pieces.

[0061] For example, it can be a pressure plate for fixing and supporting the free end of a workpiece, and it can also be a vibration isolator for preventing buckling by absorbing vibration of the workpiece.

[0062] The structure (200) can be movably placed on the bed (100).

[0063] Each of the above plurality of structures (200) may include a base portion (210), a clamping portion (220), and a sensing portion (230).

[0064] The base part (210) is placed on the bed (100).

[0065] A clamping part (220) can be placed on the inside of the base part (210).

[0066] The clamping part (220) is arranged to be movable up and down on the base part (210) so as to selectively clamp or unclamp the bed (100) and the transport part (300).

[0067] Specifically, the clamping portion (220) may include a piston portion (221), a load portion (222), a brake pad portion (223), and a cover portion (224).

[0068] The cover part (224) is placed on the inner lower part of the base part (210) and forms a chamber that can introduce or release pressure into the space formed by covering the lower space of the base part (210).

[0069] A piston part (221) and a part of a rod part (220) are placed in the chamber and operate by pressure.

[0070] The piston part (221) is positioned so as to be able to rise and fall on the inside of the base part (100) by the inflow or outflow pressure.

[0071] When pressure is introduced into the upper part of the piston part (221), the piston part (221) descends, and when pressure is introduced into the lower part of the piston part (221), the piston part (221) rises.

[0072] The load section (222) is connected to the piston section (221) on one side so that it moves up and down together with the piston section (221) on the inside of the base section (210).

[0073] Specifically, the load section (222) can be raised and lowered together with the piston section (221) by the piston section (221) that is arranged to be raised and lowered on the inside of the base section (100) by the inflow or outflow pressure.

[0074] Meanwhile, the other side of the load portion (222) is formed to extend vertically so as to protrude outward from the base portion (210).

[0075] In addition, the other end of the load section (222) is complementarily connected to the connecting section (321) formed in the separation nut section (320), which is a component of the transport section (300), according to the elevation.

[0076] Specifically, when the load section (222) rises, the other end of the load section (222) and the coupling section (321) are separated from each other and the coupling is released (unclamped), and when the load section (222) descends, the other end of the load section (222) and the coupling section (321) are complementarily coupled (clamped) to each other.

[0077] The brake pad part (223) is coupled to the other side of the load part (222) and moves up and down in conjunction with the up and down movement of the load part (222) to selectively come into contact with the guide part (110) of the bed (100).

[0078] The brake pad portion (223) is placed on the outer lower part of the base portion (210) and selectively comes into contact with the guide portion (110) of the bed (100) to clamp or unclamp with the bed.

[0079] The brake pad portion (223) may include a main body portion (2231) and a wing portion (2232).

[0080] The main body (2231) is the part to which the load part (222) is connected.

[0081] That is, it is connected to the other side of the load section (222).

[0082] The wing portion (2232) is formed by bending downward along the width direction of the main body portion (2231) and extending, and can be selectively combined with the guide portion (110).

[0083] Specifically, when the load section (222) rises, the brake pad section (223) also rises together with the load section (222), and the upper surface of the wing section (2232) of the brake pad section (223) comes into contact with the lower surface of the guide section (110) of the bed (100), thereby clamping the structure (200) and the bed (100).

[0084] Conversely, when the load section (222) is lowered, the brake pad section (223) is also lowered together with the load section (222), so that the upper surface of the wing section (2232) of the brake pad section (223) is separated from the lower surface of the guide section (110) of the bed (100), and the structure (200) and the bed (100) are unclamped.

[0085] The other end of the load section (222) and the coupling section (321) are separated from each other and the coupling is released (unclamped), and when the load section (222) is lowered, the other end of the load section (222) and the coupling section (321) are complementarily coupled (clamped) to each other.

[0086] The above brake pad part (223) can be installed and connected to the load part (222) so that the lower end (DD) of the load part protrudes lower than the lower end (CC) of the main body part (2231).

[0087] When formed in this manner, as described later, the clamping / unclamping operation of the structure and the transport unit and the unclamping / clamping operation of the structure and the bed can be implemented simultaneously with only one rising or lowering operation of the piston unit (221).

[0088] The sensing unit (230) is placed on a part of the base unit (210) adjacent to the clamping unit (220).

[0089] The sensing unit (230) is placed on the outside of the base unit (210) and detects the dog unit (330) of the transport unit (300).

[0090] When the sensing unit (230) detects the dog unit (330) of the transfer unit (300), the coupling position of the separation nut unit and the structure is established.

[0091] The transfer unit (300) of the transfer device (1) of the machine tool according to the present invention is placed on the bed (100) to transfer the plurality of structures (200).

[0092] In addition, the transport unit (300) can transport the combined structure (200) by detachably connecting a part of the transport unit (300) to any one of the plurality of structures (200).

[0093] That is, multiple structures (200) can be moved on a bed (100) by utilizing one transfer unit (300).

[0094] The transfer unit (300) may include a screw unit (310), a separation nut unit (320), and a dog unit (330).

[0095] The screw section (310) is arranged to extend longitudinally along the bed (100).

[0096] A screw thread may be formed on the outer surface of the screw portion (310).

[0097] The separation nut part (320) moves linearly on the screw part (310) by the rotation of the screw part (310).

[0098] The separation nut portion (320) may have a coupling portion that is selectively coupled with the above structure.

[0099] The separation nut part (320) may have a coupling part (321) that is selectively coupled with the clamping part (220) by the up-and-down movement of the clamping part (220).

[0100] The coupling portion (321) can be formed by being recessed into the upper surface of the separation nut portion (320) so as to accommodate the other end of the load portion (222) as shown in the drawing.

[0101] The dog part (330) is placed in the separation nut part (320) and detects the sensing part provided in the structure (200) and can then confirm the position of the structure (200) that is coupled with the separation nut part (320).

[0102] The control unit (400) of the transfer device (1) of the machine tool according to the present invention can control the operation of the transfer unit (300) and the plurality of structures (200).

[0103] Referring to FIG. 4, when the clamping part (220) is lowered under the control of the control part (400), the clamping part (220) and the bed (100) are unclamped, while the clamping part (220) and the separation nut part (320) are clamped.

[0104] Specifically, the operation of the clamping part (220) is controlled according to the control of the control part (400), so that when the piston part (221) descends, the load part (222) also descends.

[0105] In this way, as the load section (222) is lowered, the brake pad section (223) positioned on the other side of the load section (222) is also lowered and unclamped by being spaced apart from the guide section (110) of the bed (100) by the lowered length of the load section (222).

[0106] And, by lowering the load section (222), the other end of the load section (222) and the coupling section (321) are complementarily coupled to each other and clamped.

[0107] Referring to FIG. 6, when the clamping part (220) rises under the control of the control part (400), the clamping part (220) and the bed (100) are clamped, while the clamping part (220) and the separation nut part (320) are unclamped.

[0108] Specifically, the operation of the clamping part (220) is controlled according to the control of the control part (400), and when the piston part (221) rises, the load part (222) also rises.

[0109] In this way, as the load section (222) rises, the brake pad section (223) positioned on the other side of the load section (222) also rises and comes into contact with the guide section (110) of the bed (100) to be unclamped.

[0110] And, by the rise of the load section (222), the other end of the load section (222) and the connecting section (321) are separated from each other and unclamped.

[0111] In this way, the transfer device of a machine tool and the transfer method of a machine tool according to the present invention can clamp / unclamp between a structure and a transfer unit through a single operation without complex operation of a clamping unit, and can clamp / unclamp between a structure and a bed, thereby enabling rapid and convenient transfer of multiple structures.

[0112] In addition, the control unit (400) determines the transfer order of the plurality of structures (200), and controls the operation of the separation nut unit (320) according to the determined transfer order, thereby controlling the transfer direction and transfer amount of the separation nut unit (320) to sequentially transfer the plurality of structures (200).

[0113] Specifically, the control unit (400) sequentially detects the sensing unit of the structure (20) that is first transferred among the plurality of structures (200) or the sensing unit of the structure (21) that is to be transferred next in order by the dog unit (330) to control the transfer direction and transfer amount of the separation nut unit (320) so that the plurality of structures (200) can be transferred sequentially.

[0114] In this way, the transport device of a machine tool and the transport method of a machine tool according to the present invention can overcome spatial limitations and improve user convenience and satisfaction by allowing a transport unit for transporting a structure to be detachably connected to any one of a plurality of structures and sequentially transporting the connected structures so that a plurality of structures can be applied to the machine tool.

[0115] In addition, the control unit can transport the structure (21) to be transported in the next order by limiting the transport amount to the maximum allowable transport amount range in order to prevent interference between the plurality of structures (200) transported sequentially through the separation nut unit (320).

[0116] Referring to Fig. 7, in order to calculate the transport distance of the plurality of structures (200) sequentially transported through the separation nut part (320), after the transport of the first-priority structure (20) is completed, the separation nut part (320) moves to the next-priority structure (21) and measures the distance (D1) between the first-priority structure (20) and the next-priority structure (21).

[0117] For example, when the separation nut part (320) starts to move to the next-priority structure (21) after the transfer to the target position of the first-priority structure (20) is completed, the dog part (330) turns off the signal of the sensing part (230) of the first-priority structure (20) and measures the rotational speed of the servo motor that operates the screw part from the moment the signal of the sensing part (230) of the first-priority structure (20) turns off, and when the signal of the sensing part (230) of the next-priority structure (21) turns on, the measurement of the rotational speed of the servo motor is stopped and the distance (D1) between the first-priority structure (20) and the next-priority structure (21) is measured in real time and stored in the control part (400).

[0118] Referring to FIG. 8, when the transport unit (300) moved to the next-order structure (21) is positioned at the correct position to be clamped with the next-order structure (21), the signal of the sensing unit (230) of the next-order structure (21) is turned on, and in order to transport the next-order structure (21), the next-order structure (21) and the bed (100) are unclamped by the on signal of the sensing unit (230) of the next-order structure (21) and the lowering signal of the clamping unit of the next-order structure (21), so that the next-order structure (21) can be moved on the bed, and the next-order structure (21) and the transport unit (300) are clamped to prepare to transport the next-order structure (21) through the transport unit (300).

[0119] Referring to Fig. 9, when the next-order structure (21) coupled to the transfer unit (300) starts to transfer to the target position, the signal of the sensing unit (230) of the next-order structure (21) turns OFF and the rotation speed of the servo motor starts to be measured in real time.

[0120] In this process, when the worker inputs data by setting the access restriction distance (D2) between the first-priority structure (20) and the second-priority structure (21), the control unit (400) converts the data into the distance (D3) between the sensing units of each adjacent structure among the plurality of structures based on the stored data and the stored access restriction distance.

[0121] The control unit (400) calculates the maximum allowable transfer amount range (D4) by subtracting the distance (D1) between the first-priority structure (20) and the second-priority structure (21) converted into the distance (D3) between the sensing units of each adjacent structure, and limits the transfer amount of the structure (21) to be transferred in the second-priority to the maximum allowable transfer amount range (D4).

[0122] In this way, the transfer device and transfer method of the machine tool according to the present invention can prevent interference between a plurality of structures that are transferred sequentially by limiting the transfer amount of the structure to be transferred in the next order to the maximum allowable transfer amount range, thereby promoting the stability and reliability of the machine tool.

[0123] Referring to FIG. 10, a method of transferring a machine tool according to the present invention will be described.

[0124] As illustrated in FIG. 10, the transfer method of the machine tool includes a data storage step (S1), a transfer order determination step (S2), a separation nut part movement, a first-priority structure fixed position stop step (S3), a first-priority structure clamping part lowering step (S4), a first-priority structure target position transfer step (S5), a first-priority structure clamping part raising step (S6), a separation nut part movement, a next-priority structure fixed position stop step (S7), a next-priority structure clamping part lowering step (S8), a sensing part distance conversion step (S9), a next-priority structure maximum allowable transfer amount range calculation step (S10), a next-priority structure target position transfer step (S11) within the calculated range, a next-priority structure clamping part raising step (S12), and a separation nut part movement followed by a next-priority structure fixed position stop step (S13).

[0125] The overall operating principle, control method, and equipment configuration of the transfer method of the machine tool according to the present invention are the same as those of the transfer device of the machine tool described above, and the differences will be explained below with emphasis on the differences.

[0126] The present invention relates to a transfer method of a machine tool for sequentially transferring and fixing a plurality of structures (200) without interference between the plurality of structures (200) by the operation of a separation nut part (320).

[0127] First, in order to sequentially transport a plurality of structures (200) without interference between the plurality of structures (200) by the operation of the separation nut part (320), a processing program, information on each of the plurality of structures (200), a target position for each of the plurality of structures (200), and data on the approach restriction distance (D2) between adjacent structures among the plurality of structures are stored.

[0128] After the data storage step (S1), the transfer order of multiple structures (200) that fit the processing program is determined.

[0129] After the transfer order determination step (S2), the separation nut part (320) moves according to the determined transfer order and stops at the correct position with respect to the priority structure (20).

[0130] The correct position is recognized by the movement of the above separation nut part (320) and the dog part (330) of the transfer part (300) detecting the sensing part (230) of the priority structure (20).

[0131] After the separation nut part movement and the priority structure position stopping step (S3), the clamping part (220) of the priority structure (20) is lowered to unclamp the priority structure (20) from the bed (100) and clamp it to the separation nut part (320).

[0132] That is, the priority structure (20) is unclamped from the bed (100) and is in a state where it can move on the bed (100), and the priority structure (20) is clamped to the separation nut part (320) and is in a state where it can be moved by the separation nut part (320).

[0133] After the priority structure clamping section lowering step (S4), the separation nut section (320) to which the priority structure (20) is attached moves to transport the priority structure (20) to a preset target position.

[0134] After the step (S5) of moving the priority structure to the target position, the clamping part (220) of the priority structure (20) is raised to clamp the priority structure (20) to the bed (100) and unclamp it to the separation nut part (320).

[0135] That is, the priority structure (20) is clamped to the bed (100) and is strongly fixed to the bed (100) to prevent the priority structure (20) from being moved away from the target position due to an external load that may occur during processing.

[0136] In addition, the priority structure (20) is in a state where only the unclamping separation nut part (320) is separated from the separation nut part (320) and can move independently.

[0137] This completes the transfer of the priority structure (20) to the target location.

[0138] After the priority structure clamping section rising step (S6), only the separation nut section (320) separated from the priority structure (20) moves according to the decision transfer order and stops at the correct position with respect to the next priority structure (21).

[0139] The fixed position is recognized by the movement of the above-mentioned separation nut part (320) and the dog part (330) of the transfer part (300) detecting the sensing part (230) of the next-order structure (21).

[0140] Meanwhile, at the stage where only the separated separation nut part (320) moves and stops at the fixed position with respect to the next-priority structure (21), the movement distance of the separated separation nut part (320) is calculated to measure the distance (D1) between the first-priority structure (20) and the next-priority structure (21).

[0141] After the step (S7) of moving the separation nut part and stopping the position of the next-order structure, the clamping part (220) of the next-order structure (21) is lowered to unclamp the next-order structure (21) from the bed (100) and clamp it to the separation nut part (320).

[0142] That is, the next-order structure (21) is unclamped from the bed (100) and can move on the bed (100), and the next-order structure (21) is clamped to the separation nut part (320) and can be moved by the separation nut part (320).

[0143] After the step of lowering the clamping section of the next-order structure (S8), the distance (D3) between the sensing sections of each adjacent structure among the plurality of structures is converted by the stored data and the stored access restriction distance (D2).

[0144] After the sensing section distance conversion step (S9), the maximum allowable transfer amount range (D4) of the above-mentioned next-order structure (21) is calculated in real time using the stored data, conversion result, and calculation result.

[0145] After the step (S10) of calculating the maximum allowable transfer amount range of the next-order structure, the separation nut part (320) to which the next-order structure (21) is attached moves so that the next-order structure (21) is transferred to a pre-stored target position within the calculated maximum allowable transfer amount range (D4) of the next-order structure (21).

[0146] After the step (S11) of moving the next-order structure to the target position within the calculated range, the clamping part (220) of the next-order structure (21) is raised to clamp the next-order structure (21) to the bed (100) and unclamp it to the separation nut part (320).

[0147] That is, the secondary structure (21) is clamped to the bed (100) and is strongly fixed to the bed (100) to prevent the secondary structure (21) from being moved away from the target position due to an external load that may occur during processing.

[0148] In addition, the secondary structure (21) is in a state where only the unclamping separation nut part (320) is separated from the separation nut part (320) and can move independently.

[0149] After the step of raising the clamping part of the next-order structure (S12), only the separation nut part (320) separated from the next-order structure (21) moves according to the decision transfer order and stops at the correct position for the next-order structure.

[0150] Multiple structures can be sequentially transferred by repeating the above-described process.

[0151] Although the detailed description of the present invention described above has been described with reference to preferred embodiments of the present invention, it will be understood by those skilled in the art or having ordinary knowledge in the art that various modifications and changes can be made to the present invention without departing from the spirit and technical scope of the present 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 defined by the claims.

[0152] <Explanation of symbols>

[0153] 100: Bed

[0154] 200: Structure

[0155] 300: Transport section

[0156] 400: Control Unit

Claims

1. Bed; A plurality of structures movably arranged on the bed; and A transport device for a machine tool, characterized in that it includes a transport unit disposed on the bed to transport the plurality of structures, and detachably coupled to any one of the plurality of structures to transport the combined structure.

2. In paragraph 1, A transfer device for a machine tool, characterized in that it further includes a control unit that controls the operation of the transfer unit and the plurality of structures.

3. In accordance with paragraph 2, Each of the above multiple structures is A base portion placed on the above bed; and A transport device for a machine tool, characterized in that it includes a sensing unit arranged on a part of the base portion.

4. In paragraph 3, The above transport unit, A screw portion extending longitudinally along the above bed; A separation nut part having a coupling part that is selectively coupled with the above structure and moves linearly on the screw part by rotation of the screw part; and A transport device for a machine tool, characterized in that it includes a dog part arranged in the separation nut part to detect the sensing part.

5. In paragraph 4, The above plurality of structures further include a clamping unit that is arranged to be movable up and down on the base unit and selectively clamps or unclamps the bed and the transport unit; A transport device for a machine tool, characterized in that when the clamping part is lowered under the control of the control part, the clamping part and the bed are unclamped, and the clamping part and the separation nut part are clamped.

6. In paragraph 5, A transport device for a machine tool, characterized in that when the clamping part rises under the control of the control part, the clamping part and the bed are clamped, and the clamping part and the separation nut part are unclamped.

7. In accordance with paragraph 4, The above control unit, A transport device for a machine tool, characterized in that the transport order of the plurality of structures is determined, and the operation of the separation nut part is controlled according to the determined transport order, thereby controlling the transport direction and transport amount of the separation nut part to sequentially transport the plurality of structures.

8. In paragraph 7, The above control unit, A transport device for a machine tool characterized in that the transport amount of a structure to be transported in the next order is limited to the maximum allowable transport amount range to prevent interference between the plurality of structures transported sequentially through the above separation nut section.

9. In paragraph 4, The above clamping part, A piston part arranged to be able to rise and fall inside the base part by the inflow or outflow of pressure; A rod part having one end joined to the piston part so as to move up and down together with the piston part on the inside of the base part, and the other end extended vertically so as to protrude outward from the base part, and the other end complementarily joined to the joining part; and A transfer device for a machine tool, characterized in that it includes a brake pad part that is connected to the other side of the load part and moves up and down in conjunction with the up and down movement of the load part and selectively comes into contact with the guide part of the bed.

10. In paragraph 9, The above brake pad part, A main body part to which the above load part is coupled; and A transport device for a machine tool, characterized in that it includes a wing portion that is formed by bending downward along the width direction of the main body portion and extending, and is selectively combined with the guide portion.

11. In paragraph 10, A transfer device for a machine tool, characterized in that the brake pad portion is installed and joined to the load portion so that the lower end of the load portion protrudes lower than the lower end of the main body portion.

12. A step of storing a processing program, information on each of the plurality of structures, a target position for each of the plurality of structures, and data on an approach restriction distance between adjacent structures among the plurality of structures in order to sequentially transport a plurality of structures without interference between the plurality of structures by the operation of the separation nut section; A step of determining the transfer order of multiple structures; A step in which the above separation nut part moves according to the decision transfer order and stops at a fixed position with respect to the priority structure; A step of lowering the clamping part of the above-mentioned priority structure and clamping the above-mentioned priority structure to the separation nut part while unclamping the above-mentioned priority structure from the bed; A step of moving a separation nut part to which the above-mentioned priority structure is attached and transferring the above-mentioned priority structure to a pre-stored target position; A step of raising the clamping part of the above-mentioned priority structure to clamp the above-mentioned priority structure to the bed and unclamping it to the above-mentioned separation nut part; and A transfer method of a machine tool, characterized in that it includes a step of moving only a separation nut part separated from the above-mentioned priority structure according to the decision transfer order and stopping at a fixed position with respect to the next priority structure.

13. In paragraph 12, A method for transferring a machine tool, characterized in that the movement distance of the separated separation nut part is calculated in a step in which only the separated separation nut part moves and stops at a fixed position with respect to a next-order structure.

14. In paragraph 13, After the step of moving only the separated separation nut part and stopping at the correct position for the next-order structure, A step of lowering the clamping part of the above-mentioned structure and clamping the above-mentioned structure to the separation nut part while unclamping the above-mentioned structure from the bed; A step of converting the distance between sensing units of each adjacent structure among the plurality of structures into a distance using pre-stored data and pre-stored access restriction distance; A step of calculating the maximum allowable transfer amount range of the above-mentioned structure using the stored data, conversion results, and output results; A step of moving a separation nut part to which the above-mentioned structure is attached and transferring the above-mentioned structure to a pre-stored target position within the calculated maximum allowable transfer amount range of the above-mentioned structure; A step of raising the clamping part of the above-mentioned structure to clamp the above-mentioned structure to the bed and unclamping it to the separation nut part; and A transfer method of a machine tool, characterized in that it includes a step of moving only a separation nut part separated from the above-mentioned structure according to the decision transfer order and stopping at a fixed position with respect to the next-order structure.

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