Tool magazine for machine tool

Abstract

The present invention relates to a tool magazine for a machine tool, the tool magazine comprising: a frame unit; a chain unit having a plurality of gripper units adjacently connected to each other and disposed at the frame unit to be rotatable in one closed loop shape; a sprocket unit coupled to the chain unit and disposed at the frame unit to rotate or support the chain unit; and a plurality of tool port units mounted on the plurality of gripper units, respectively, to accommodate tools, wherein each of the plurality of gripper units comprises: a pair of link units disposed to face each other; a gripper unit which is disposed at the pair of link units and into which the tool port unit is inserted and disposed; and a link pin for connecting the pair of link units with a pair of adjacent link units to each other.

Description

Tool magazine for machine tools

[0001] The present invention relates to a tool magazine for a machine tool, and more particularly, to a tool magazine for a machine tool that can reduce noise through frictionless operation and promote miniaturization of the tool magazine.

[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, CNC lathes, and multi-tasking machines, are widely used in various industrial fields for their respective tasks.

[0004] Among machine tools, a multi-tasking machine (MTM) is a turning center equipped with a multi-functional automatic tool changer (ATC) and a tool magazine, capable of performing a variety of machining operations, including turning, drilling, tapping, and milling. In a multi-tasking machine, the operator manually loads or replaces tools required for machining into the tool magazine.

[0005] 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.

[0006] 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.

[0007] 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.

[0008] Additionally, machine tools generally use multiple tools for various processing operations, and tool magazines or turrets are used as tool storage spaces for storing multiple tools.

[0009] These machine tools use multiple tools for various processing tasks, and a tool magazine is used as a tool storage space to store multiple tools.

[0010] 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.

[0011] 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.

[0012] In general, a machining center refers to a machine tool that is equipped with an automatic tool changer and can perform a wide range of processing such as lathes, milling machines, drilling machines, and boring machines by exchanging various types of tools. It is broadly divided into a vertical machining center with the axis mounted vertically and a horizontal machining center.

[0013] Typically, machine tools use a variety of tools to perform various machining operations, and these tools are stored in tool magazines.

[0014] Additionally, there are various types of tool magazines, and depending on the type, they can be categorized into matrix type, chain type, and drum type.

[0015] Typically, a matrix-type tool magazine stores multiple tools in tool compartments arranged in a matrix, and a servo-motor-driven tool changer moves along a Cartesian coordinate system to remove or install the corresponding tools from the tool compartment. While this matrix-type tool magazine offers the advantage of being able to store a large number of tools, it also has the disadvantage of taking up a large amount of installation space and requiring a lot of time for tool exchange.

[0016] Furthermore, drum-type tool magazines typically store small tools in a rotating drum-shaped magazine attached to the machine tool body. This structure requires no separate installation space and is integrated into the machine tool, facilitating quick tool changes. However, the limited tool storage capacity limits the availability of tools for a variety of machining tasks.

[0017] Meanwhile, a chain-type tool magazine installs a tool storage unit on a chain installed in an endless track along a certain path, drives a sprocket by a magazine motor composed of a servo motor, and moves tools stored in the tool storage unit to a tool exchange position while the chain engaged with the sprocket rotates along the path.

[0018] Chain-type tool magazines can store a relatively large number of tools depending on the arrangement of the tool storage compartment and the length of the chain. They are installed adjacent to the tool change location of the machine tool, so they have the advantage of reducing the installation area and shortening the tool change time compared to matrix-type tool magazines.

[0019] Depending on the configuration of the tool storage section, this chain-type tool magazine can be divided into a chain storage method in which tools are stored directly on the axis of the link pins forming the chain, and a tool port storage method in which tools are inserted into a tool port and stored together with the tool port in a gripper installed on the outside of the chain link.

[0020] The chain storage method offers the advantage of being compact due to the freedom of the chain's curved configuration. However, because the tool is directly mounted on the chain, a separate tool transport device is required and the cycle time is slow.

[0021] The tool port storage method, with the port inserted into a chain, can be implemented without a tool transport device, resulting in a fast cycle time. However, it has limitations in terms of curve configuration. In particular, the larger radius of curvature in the counter-curve (reverse feed section) increases the overall magazine layout, requiring a separate guide device to prevent the load from being concentrated on the port.

[0022] The tool magazine of a conventional machine tool is configured by connecting link parts with link pins, and the chain rotates along a set path by driving a drive sprocket equipped with a magazine motor. The chain rotates in a closed loop form and moves in a straight and curved transport section.

[0023] In this way, when the chain of the tool magazine of a conventional machine tool moves along a curved transport section, the gripper units are bent by each other by the link pin.

[0024] In the conventional machine tool tool holder, the link pins were arranged so that they were offset to one side of the gripper unit. Even with this arrangement, when the chain moves along the forward curved feed section, the distance between the link portion and the adjacent link portion increases, so interference between the link portion and the adjacent link portion did not become a problem.

[0025] However, when the chain moves in a reverse curved transport section with the link pins arranged to one side of the gripper unit as in the past, the distance between the link portions and adjacent link portions must become shorter, so the radius of curvature of the reverse curved transport section becomes larger to prevent interference between the link portions and adjacent link portions.

[0026] Accordingly, the overall layout of the magazine equipment became larger, and the capacity of the tool storage was limited, making it impossible to mount all the tools required to perform complex processing.

[0027] The present invention is to solve the above problems, and the purpose of the present invention is to provide a tool magazine for a machine tool that aligns the centers of link pins connecting a pair of link parts and an adjacent pair of link parts with the centers of tool ports inserted and placed in a gripper part, so that no interference occurs between adjacent link parts with a small curvature even when the chain part is bent in either the process of moving the forward curved feed section or the process of moving the reverse curved feed section, thereby making the layout of the tool magazine compact.

[0028] In addition, another object of the present invention is to provide a tool magazine for a machine tool capable of reducing noise by arranging a support sprocket on a reverse curved transport section, thereby preventing noise from being generated due to friction caused by the port directly moving the guide as in the past.

[0029] In order to achieve the object of the present invention, a tool magazine of a machine tool according to the present invention comprises: a frame portion; a chain portion having a plurality of gripper units connected and arranged adjacent to each other, and rotatably arranged on the frame portion in a closed loop form; a sprocket portion arranged on the frame portion to be coupled to the chain portion and to rotate or support the chain portion; and a plurality of tool port portions respectively mounted on the plurality of gripper units to receive tools; wherein each of the plurality of gripper units may include a pair of link portions arranged to face each other; a gripper portion arranged on the pair of link portions into which the tool port portions are inserted and arranged; and a link pin connecting the pair of link portions and an adjacent pair of link portions to each other.

[0030] In addition, in another preferred embodiment of the tool magazine of the machine tool according to the present invention, the gripper units are flexibly connected to each other by the link pin, and the center of the link pin can coincide with the center of the tool port portion inserted and arranged in the gripper portion.

[0031] In addition, in another preferred embodiment of the tool magazine of the machine tool according to the present invention, the chain section includes a curved transport section having a straight transport section, a forward curved transport section, and a reverse curved transport section, and the straight transport section between the forward curved transport section and the reverse curved transport section can be arranged diagonally.

[0032] In addition, in another preferred embodiment of the tool magazine of the machine tool according to the present invention, the sprocket section may include a drive sprocket installed in a part of the frame section and generating power to rotate the chain section; one or more support sprockets installed on a reverse curved feed section of the chain section in the frame section; and one or more guide sprockets installed on a forward curved feed section of the chain section in the frame section, excluding a part where the drive sprocket is installed, and guiding the rotation of the chain section.

[0033] In addition, in another preferred embodiment of the tool magazine of the machine tool according to the present invention, the drive sprocket may have a plurality of gear teeth formed on the outer surface thereof, and the length of each gear tooth may be formed to be equal to or longer than the length from one end of the link portion to the center of the link pin.

[0034] In another preferred embodiment of the tool magazine of the machine tool according to the present invention, the drive sprocket has a plurality of gear teeth formed on the outer surface, and a space is formed between the adjacent gear teeth to avoid interference with the tool port portion, and each of the gear teeth is inserted between the pair of link parts and can rotate by supporting the link pin inserted into the pair of link parts.

[0035] In addition, in another preferred embodiment of the tool magazine of the machine tool according to the present invention, each of the support sprockets may have a plurality of gear teeth formed on the outer surface thereof, and the length of each of the gear teeth may be formed to be equal to or shorter than the length of the gear tooth.

[0036] In another preferred embodiment of the tool magazine of the machine tool according to the present invention, the support sprocket has a plurality of gear teeth formed on the outer surface, and a cavity is formed between the adjacent gear teeth to avoid interference with the tool port portion, and each gear tooth is inserted between the pair of link parts and can support and rotate the link pin inserted into the pair of link parts.

[0037] In addition, in another preferred embodiment of the tool magazine of the machine tool according to the present invention, a tension adjusting unit that is coupled to one or two or more of the one or more guide sprockets and adjusts the tension of the chain unit may be further included.

[0038] In addition, in another preferred embodiment of the tool magazine of the machine tool according to the present invention, a guide portion arranged in the frame portion to support the chain portion together with the sprocket portion may be further included.

[0039] In addition, in another preferred embodiment of the tool magazine of the machine tool according to the present invention, the guide portion may include at least one first guide portion arranged to face the support sprocket with respect to the chain portion on a reverse curved feed section of the chain portion; and at least one second guide portion arranged to face the drive sprocket and the guide sprocket with respect to the chain portion on a forward curved feed section of the chain portion.

[0040] In addition, in another preferred embodiment of the tool magazine of the machine tool according to the present invention, an auxiliary guide part installed on the linear transport section of the chain part to guide movement of the chain part may be further included.

[0041] The tool magazine of the machine tool according to the present invention has the center of the link pin connecting a pair of link parts and an adjacent pair of link parts with each other and the center of the tool port part inserted and arranged in the gripper part, so that even if the chain part is bent in either the process of moving the forward curved feed section or the process of moving the reverse curved feed section, there is no interference between the adjacent link parts with a small curvature, thereby promoting miniaturization and weight reduction of the tool magazine device, and at the same time promoting compactness of the machine tool, thereby having the effect of maximizing space utilization.

[0042] In addition, the tool magazine of the machine tool according to the present invention can prevent noise from being generated due to friction caused by the port directly moving the guide as in the past by arranging the support sprocket on the reverse curved feed section, thereby reducing noise and improving the working environment, and increasing the stability and reliability of the machine tool.

[0043] In addition, the tool magazine of the machine tool according to the present invention can mount multiple tools, thereby promoting convenience for the operator, preventing safety accidents caused by tool movement or mounting, and reducing work costs.

[0044] 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.

[0045] Figure 1 is a front view of a tool magazine of a machine tool according to an embodiment of the present invention.

[0046] Fig. 2 shows a perspective view of a gripper unit of a tool magazine of a machine tool according to an embodiment of the present invention.

[0047] Fig. 3 shows a perspective view of a chain section of a tool magazine of a machine tool according to an embodiment of the present invention.

[0048] Fig. 4 shows a front view of a tool port mounted on a gripper unit of a tool magazine of a machine tool according to an embodiment of the present invention.

[0049] Fig. 5 shows a cross-sectional view of a drive sprocket of a tool magazine of a machine tool according to an embodiment of the present invention.

[0050] Fig. 6 shows a cross-sectional view of a support sprocket of a tool magazine of a machine tool according to an embodiment of the present invention.

[0051] Hereinafter, a tool magazine of 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.

[0052] 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.

[0053] 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.

[0054] Fig. 1 is a front view of a tool magazine of a machine tool according to an embodiment of the present invention. Fig. 2 is a perspective view of a gripper unit of a tool magazine of a machine tool according to an embodiment of the present invention.

[0055] Fig. 3 is a perspective view of a chain section of a tool magazine of a machine tool according to an embodiment of the present invention. Fig. 4 is a front view of a gripper unit of a tool magazine of a machine tool according to an embodiment of the present invention, with a tool port installed therein.

[0056] Fig. 5 shows a cross-sectional view of a driving sprocket of a tool magazine of a machine tool according to an embodiment of the present invention. Fig. 6 shows a cross-sectional view of a supporting sprocket of a tool magazine of a machine tool according to an embodiment of the present invention.

[0057] A tool magazine (1) of a machine tool according to the present invention will be described with reference to FIGS. 1 to 6.

[0058] As illustrated in FIGS. 1 to 6, a tool magazine (1) of a machine tool according to one embodiment of the present invention includes a frame portion (100), a chain portion (200), a sprocket portion (300), a tool port portion (400), a tension adjusting portion (500), a guide portion (600), and an auxiliary guide portion (700).

[0059] A tool magazine (1) of a machine tool according to one embodiment of the present invention stores a plurality of tools to supply the most suitable tool for machining to the spindle according to the machining program or machining status of the machine tool or the operator.

[0060] According to one embodiment of the present invention, a frame part (100) of a tool magazine (1) of a machine tool forms the outer shape of the tool magazine (1) of the machine tool and is installed adjacent to a processing area of ​​the machine tool.

[0061] According to one embodiment of the present invention, the chain portion (200) of the tool magazine (1) of the machine tool is arranged in the frame portion (100) so as to be rotatable in a closed loop form.

[0062] Referring to FIG. 1, the chain section (200) is capable of rotating in a closed loop shape on the frame section (100), so that the chain section (200) passes through a straight transport section (220) and a curved transport section (230) while rotating.

[0063] Meanwhile, the curved transport section (230) can be divided into a forward curved transport section (231) and a reverse curved transport section (232).

[0064] The forward curve transfer section (231) refers to a section in which the tool port section (400) is moved by bending toward the outside of the chain section (200).

[0065] That is, in the process of moving along the forward curve transport section, the distance between the link section and the adjacent link section increases.

[0066] The reverse curve transfer section (232) refers to a section in which the tool port section (400) is moved by bending toward the inside of the chain section (200).

[0067] That is, in the process of moving along the forward curve transport section, the distance between the link section and the adjacent link section becomes closer.

[0068] And referring to FIG. 1, the straight transport section (220) between the forward curve transport section (231) and the reverse curve transport section (232) of the chain section (200) can be arranged diagonally.

[0069] Specifically, the straight transport section (200) of the chain section arranged on the outside of the 'ㄷ' shaped frame section of Fig. 1 is arranged in a straight line, but the straight transport section (200) of the chain section arranged on the inside of the 'ㄷ' shaped frame section is arranged diagonally.

[0070] In this way, the straight transport section (220) between the forward curve transport section (231) and the reverse curve transport section (232) can minimize the size of the entire magazine to some extent just by being arranged diagonally.

[0071] In addition, the straight transport section (220) between the forward curve transport section (231) and the reverse curve transport section (232) is arranged diagonally, and as described later, the center (2111) of the link pin is aligned (XX) with the center (410) of the tool port section inserted into the gripper section (212), thereby maximizing the compactness effect of the magazine size.

[0072] Meanwhile, the chain section (200) is formed by a plurality of gripper units (210) that are connected and arranged adjacent to each other.

[0073] Each of the above plurality of gripper units (210) may include a link portion (211), a gripper portion (212), and a link pin (213).

[0074] The link portion (211) may be formed in a pair, and a pair of link portions (211) are arranged to face each other.

[0075] The gripper part (212) is arranged on the pair of link parts (211) so that the tool port part (400) can be inserted and arranged.

[0076] The gripper part (212) may be formed integrally with a pair of link parts (211), or may be formed as a pair of gripper parts on each of a pair of link parts (211).

[0077] The link pin (213) is coupled by penetrating through the overlapping portion between the pair of link parts (211) and the adjacent pair of link parts (211) to connect the pair of link parts (211) and the adjacent pair of link parts (211) to each other.

[0078] Additionally, the gripper units (210) are flexibly connected to each other by the link pin (213).

[0079] Referring to Fig. 4, the center (2111) of the link pin is arranged to coincide (XX) with the center (410) of the tool port portion inserted into the gripper portion (212).

[0080] In this way, when the center (2111) of the link pin is arranged to coincide (XX) with the center (410) of the tool port portion inserted into the gripper portion (212), the angle of refraction between the gripper unit and the adjacent gripper unit, which are refracted by the link pin during the process of moving the forward curved transport section (231) while the chain portion (200) rotates (230) along the curved transport section, and the angle of refraction between the gripper unit and the adjacent gripper unit, which are refracted by the link pin during the process of moving the reverse curved transport section (232), are the same or nearly similar, so that no interference can be caused between adjacent link portions with a small curvature regardless of which way they are refracted.

[0081] Accordingly, when the chain moves in a reverse curved transport section with the link pins arranged to one side of the gripper unit, as in a tool magazine of a conventional machine tool, the distance between the link portion and the adjacent link portion must be shortened, so the problem of the radius of curvature of the reverse curved transport section becoming larger to prevent interference between the link portion and the adjacent link portion can be solved.

[0082] In this way, the tool magazine of the machine tool according to the present invention aligns the centers of the link pins connecting a pair of link parts and an adjacent pair of link parts with the centers of the tool ports inserted and arranged in the gripper part, so that even if the chain part is bent in either the process of moving the forward curved feed section or the process of moving the reverse curved feed section, there is no interference between adjacent link parts with a small curvature, thereby promoting miniaturization and weight reduction of the tool magazine device, and at the same time promoting compactness of the machine tool, thereby maximizing space utilization.

[0083] According to one embodiment of the present invention, the sprocket part (300) of the tool magazine (1) of the machine tool may be arranged on the frame part (100) to be coupled with the chain part (200) and to rotate or support the chain part (200).

[0084] Referring to FIG. 1, the sprocket portion (300) may include a drive sprocket (310), a support sprocket (320), and a guide sprocket (330).

[0085] The drive sprocket (310) is installed on a part of the frame portion (100) and can generate power to rotate the chain portion (200).

[0086] A motor for rotating the driving sprocket (310) may be mounted on the driving sprocket (310).

[0087] Referring to FIG. 5, the drive sprocket (310) has a plurality of gear teeth (311) formed on the outer surface, and the length (H) of each gear tooth may be formed to be equal to or longer than the length (h) from one end of the link portion to the center of the link pin.

[0088] That is, as the position of the link pin (213) is changed as described above, the length (H) of the gear teeth must be formed to be equal to or longer than the length from one end of the link part to the center of the link pin (h) so that the plurality of gear teeth (311) and the plurality of link pins (213) can be sequentially engaged and the chain part (200) can be rotated through the rotational drive of the drive sprocket (310).

[0089] Referring to FIG. 5, the drive sprocket (310) has a plurality of gear teeth (311) formed on the outer surface, and a space (312) may be formed between adjacent gear teeth (311) to avoid interference with the tool port portion (400).

[0090] And, each of the gear teeth (311) can be inserted between the pair of link parts (211) and rotated by supporting the link pin (213) inserted into the pair of link parts (211).

[0091] That is, while the drive sprocket (310) rotates, a plurality of gear teeth (311) are sequentially introduced between a pair of link parts (211) and support the link pin (213) inserted into the pair of link parts (211), thereby rotating the link pin (213).

[0092] In addition, a plurality of gear teeth (311) are formed on the outer surface of the drive sprocket (310), and a space (312) is formed between the adjacent gear teeth (311), so that the tool port part (400) is accommodated in the space (312), and thus interference with the tool port part (400) can be avoided in the process of the gear teeth rotating the link pin (213).

[0093] Referring to FIGS. 1 and 6, the support sprocket (320) is installed on the reverse curved transfer section (232) of the chain section (200) in the frame section (100), and one or more support sprockets (320) may be installed in the frame section (100) according to the type of magazine.

[0094] If the guide part (600) is placed in the same position instead of the support sprocket (320) on the reverse curved transfer section (232) of the chain part (200), the tool port part (400) mounted on the gripper part (212) comes into direct contact with the guide part (600).

[0095] Meanwhile, in the reverse curve transfer section (232), the tool port section (400) receives the load of both the chain section (200) and the tool located at the top.

[0096] In this way, when the tool port part (400) slides along the guide part (600) while the tool port part (400) is under load, friction occurs between the tool port part (400) and the guide part (600), causing noise.

[0097] In order to solve the above problem, in the present invention, the support sprocket (320) is installed on the reverse curved transfer section (232) of the chain section (200) in the frame section (100).

[0098] That is, since the tool port part (400) is supported and rotates by the support sprocket (320), noise reduction can be achieved through friction reduction of the tool port part (400).

[0099] In this way, the tool magazine of the machine tool according to the present invention can prevent noise from being generated due to friction caused by the port directly moving the guide as in the past by arranging the support sprocket on the reverse curved feed section, thereby reducing noise and improving the working environment, and increasing the stability and reliability of the machine tool.

[0100] Meanwhile, referring to FIG. 6, each of the support sprockets (320) has a plurality of gear teeth (321) formed on the outer surface thereof, and the length (D) of each gear tooth may be formed to be equal to or shorter than the length (H) of the gear tooth.

[0101] That is, the length (D) of the gear teeth can be formed to be equal to or shorter than the length (H) of the gear teeth so that the chain part (200) can be rotated by sequentially engaging a plurality of the gear teeth (321) and a plurality of the link pins (213) through the rotational drive of the support sprocket (320).

[0102] Referring to FIG. 6, the support sprocket (320) has a plurality of gear teeth (321) formed on the outer surface, and a cavity (322) may be formed between adjacent gear teeth (321) to avoid interference with the tool port portion (400).

[0103] And, each of the gear teeth (321) can be inserted between the pair of link parts (211) and rotated by supporting the link pin (213) inserted into the pair of link parts (211).

[0104] That is, as the support sprocket (320) rotates, a plurality of gear teeth (321) are sequentially introduced between a pair of link parts (211) and support the link pin (213) inserted into the pair of link parts (211), thereby allowing the link pin (213) to rotate.

[0105] In addition, a plurality of gear teeth (321) are formed on the outer surface of the support sprocket (320), and a cavity (322) is formed between the adjacent gear teeth (321), so that the tool port part (400) is accommodated in the cavity (322), and thus interference with the tool port part (400) can be avoided in the process of the gear tooth (321) rotating the link pin (213).

[0106] The guide sprocket (330) is installed on the forward curved transport section (231) of the chain section (200) in the frame section (100), excluding the section where the drive sprocket (310) is installed, and serves to guide the rotation of the chain section.

[0107] One or more guide sprockets (330) can be installed in the frame portion (100) according to the type of magazine.

[0108] According to one embodiment of the present invention, the tool magazine (1) of a machine tool comprises a plurality of tool port sections (400), and each tool port section (400) is mounted on the plurality of gripper units (210) to store a tool.

[0109] According to one embodiment of the present invention, the tension adjusting unit (500) of the tool magazine (1) of the machine tool can be arranged to be coupled to one or two or more of the one or more guide sprockets (330) to adjust the tension of the chain unit (200).

[0110] If the chain part (200) is stretched due to repeated use of the chain part (200), the rotation of the chain part (200) may not be smooth.

[0111] In order to prevent the rotation of the chain part (200) from not being smooth, a tension adjusting part (500) is arranged in combination with one or two or more of the guide sprockets (330) to maintain the tension of the chain part (200) constant.

[0112] According to one embodiment of the present invention, the guide part (600) of the tool magazine (1) of the machine tool is arranged in the frame part (100) to support the chain part (200) together with the sprocket part (300).

[0113] The guide part (600) may include a first guide part (610) and a second guide part (620).

[0114] The first guide part (610) can be arranged to face the support sprocket (320) with respect to the chain part (200) on the reverse curved transfer section (232) of the chain part (200).

[0115] Additionally, one or more support sprockets (320) may be placed on the frame portion (100) to correspond to the number of support sprockets (320).

[0116] The second guide part (620) can be arranged to face the drive sprocket (310) and the guide sprocket (330) with respect to the chain part (200) on the forward curved transport section (231) of the chain part (200).

[0117] Additionally, one or more may be placed in the frame portion (100) to correspond to the number of the drive sprocket (310) and the guide sprocket (330).

[0118] According to one embodiment of the present invention, the auxiliary guide part (700) of the tool magazine (1) of the machine tool is installed on the straight transport section (220) of the chain part (200) to guide the movement of the chain part (200).

[0119] 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.

[0120] <Explanation of symbols>

[0121] 1: Tool magazine,

[0122] 100: Frame part,

[0123] 200: Chain section,

[0124] 300: Sprocket section,

[0125] 400: Tool port section,

[0126] 500: tension control unit,

[0127] 600: Guide Department,

[0128] 700: Auxiliary guide section.

Claims

1. Frame section; A chain section having a plurality of gripper units connected and arranged adjacent to each other and arranged in a frame section so as to be rotatable in a closed loop form; A sprocket portion arranged on the frame portion to rotate or support the chain portion by being combined with the chain portion; and It includes a plurality of tool port portions each mounted on the plurality of gripper units to store tools; Each of the above plurality of gripper units, A pair of link members arranged so as to face each other; A gripper portion arranged in the above pair of link portions and into which the tool port portion is inserted; and A tool magazine for a machine tool, characterized in that it includes a link pin connecting the pair of link parts and an adjacent pair of link parts to each other.

2. In paragraph 1, A tool magazine for a machine tool, characterized in that the gripper units are flexibly connected to each other by the link pin, and the center of the link pin coincides with the center of the tool port portion inserted into the gripper portion.

3. In paragraph 2, The above chain section includes a curved transport section having a straight transport section, a forward curved transport section, and a reverse curved transport section, A tool magazine for a machine tool, characterized in that the straight transport section between the forward curve transport section and the reverse curve transport section is arranged diagonally.

4. In paragraph 2, The above sprocket part, A drive sprocket installed on a part of the above frame portion and generating power to rotate the chain portion; One or more support sprockets installed on the reverse curved transport section of the chain section in the frame section; and A tool magazine for a machine tool, characterized in that it includes one or more guide sprockets installed on a forward curved transport section of the chain section in the frame section, excluding the section where the drive sprocket is installed, to guide the rotation of the chain section.

5. In paragraph 4, The above drive sprocket has multiple gear teeth formed on the outer surface, A tool magazine for a machine tool, characterized in that the length of each of the gear teeth is formed to be equal to or longer than the length from one end of the link portion to the center of the link pin.

6. In paragraph 4, The above driving sprocket has multiple gear teeth formed on the outer surface, and a space is formed between adjacent gear teeth to avoid interference with the tool port portion. A tool magazine for a machine tool, characterized in that each of the gear teeth is inserted between the pair of link parts and supports and rotates the link pin inserted into the pair of link parts.

7. In paragraph 5, Each of the above-mentioned support sprockets has multiple gear teeth formed on the outer surface, A tool magazine for a machine tool, characterized in that the length of each of the gear teeth is formed to be equal to or shorter than the length of the gear tooth.

8. In paragraph 5, The above support sprocket has multiple gear teeth formed on the outer surface, and a cavity is formed between the adjacent gear teeth to avoid interference with the tool port portion. A tool magazine for a machine tool, characterized in that each of the gear teeth is inserted between the pair of link parts and supports and rotates the link pin inserted into the pair of link parts.

9. In paragraph 4, A tool magazine for a machine tool, characterized in that it further includes a tension adjusting unit that is coupled to one or two or more of the above one or more guide sprockets to adjust the tension of the chain section.

10. In paragraph 4, A tool magazine for a machine tool, characterized in that it further includes a guide portion arranged on the frame portion to support the chain portion together with the sprocket portion.

11. In paragraph 10, The above guide part, At least one first guide part arranged to face the support sprocket with respect to the chain part on the reverse curved transport section of the chain part; and A tool magazine for a machine tool, characterized in that it includes at least one second guide portion arranged to face the drive sprocket and the guide sprocket with respect to the chain portion on the forward curved transport section of the chain portion.

12. In paragraph 3, A tool magazine for a machine tool, characterized in that it further includes an auxiliary guide section installed on the straight transport section of the chain section to guide the movement of the chain section.

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