KR20240149612A - Machine tool - Google Patents

Abstract

The present invention relates to a machine tool, wherein a tool loading area (B) for loading a tool (20) onto a gripper (620) and a tool exchange area (A) for exchanging a tool (20) of a spindle (400) are separated from each other at a position apart from each other, and the tension of a chain (630) can always be maintained at an appropriate tension using a tension adjusting unit (800), and the chain (630) located in the tool exchange area (A) can be restrained using a positioning unit (900).

Description

Machine tool {MACHINE TOOL}

The present invention relates to a machine tool, and more specifically, to a technology for a machine tool in which a tool loading area and a tool changing area are separated, a tension adjusting unit for adjusting the tension of a chain are provided, and a positioning unit for restricting the movement of a gripper when changing tools is provided in the tool changing area.

In general, a machine that processes a metal or non-metal material by cutting or non-cutting using an appropriate tool is called a machine tool. Machine tools include general-purpose machine tools such as lathes, milling machines, grinders, drilling machines, tapping machines, and boring machines, as well as NC (Numerical Control) machine tools, CNC (Computer Numerical Control) machine tools, turning centers, and machining centers.

A machine tool is equipped with a table on which the workpiece is placed and transferred for processing, a pallet for preparing the workpiece before processing, a spindle for rotating the tool or workpiece, a tailstock for supporting the workpiece during processing, and a quiescent plate.

Additionally, the machine tool is equipped with a transfer unit that moves the table, tool rest, spindle, tailstock, and vibration damper along the transfer axis.

These machine tools use a number of tools for various processing tasks, and tool magazines or turrets are used as tool storage spaces to store and store a number of tools.

Additionally, the machine tool is equipped with an automatic pallet changer (APC) to minimize non-processing time.

An automatic pallet changer (APC) automatically exchanges pallets between the workpiece processing area and the workpiece installation area, and the pallets can be loaded with workpieces.

In addition, the machine tool is equipped with an automatic tool changer (ATC) to withdraw or retract a specific tool from the tool magazine according to a command from the numerical control unit in order to improve the productivity of the machine tool.

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 spindle mounted vertically and a horizontal machining center.

A vertical machining center is equipped with a bed, a saddle installed on the upper part of the bed, a table installed on the saddle and on which a workpiece is placed, a column vertically installed at the rear of the bed, a spindle mounted on the column, a power transmission system and an electronic control system for driving the spindle and controlling its operation, and may additionally be equipped with an automatic tool changer, a tool magazine, and a spindle for clamping tools.

The matters described as background technology above are only intended to enhance understanding of the background of the present invention, and should not be taken as an acknowledgment that they correspond to prior art already known to those skilled in the art.

KR 10-2019-0115228A

The purpose of the present invention is to prevent sensor detection errors due to processing chips or coolant dust when detecting a tool loaded into a gripper using a sensor in the tool loading area, in which a tool loading area for loading a tool into a gripper and a tool exchange area for exchanging a tool of a spindle are separated from each other in a machine tool equipped with a tool magazine, thereby improving processing errors.

In addition, the machine tool of the present invention has another purpose of having a tension adjusting unit for adjusting the tension of the chain installed separately from the motor drive unit, thereby maintaining the tension of the chain uniformly over the entire section.

In addition, the machine tool of the present invention has another purpose in that a positioning unit for restricting movement of a gripper during tool exchange is provided in a tool exchange area, and particularly, the positioning unit is configured to fix a part directly connected to the gripper, thereby improving the precision of positioning and enhancing processing precision and stability.

In order to achieve the above-mentioned purpose, the machine tool of the present invention comprises: a tool magazine having a plurality of grippers for storing tools; and a spindle for rotating tools by combining tools for processing a workpiece; and characterized in that a tool loading area for loading tools into the grippers and a tool exchange area for exchanging tools of the spindle are separated from each other at positions spaced apart from each other.

The above tool loading area and tool exchange area are characterized by being positioned apart from one side and the front of the tool magazine.

The above-mentioned tool magazine includes a chain coupled with a gripper and a motor drive unit connected to the chain and generating power for moving the chain; and is characterized in that a tension adjustment unit for adjusting the tension of the chain is provided at a position spaced apart from the motor drive unit.

The tension adjustment unit is characterized by including: a chain guide rotatably coupled to a base frame of a tool magazine about a rotation axis at a position spaced apart from a motor drive unit; a support block fixed to the base frame and spaced apart from one end of the chain guide; a bolt penetrating the support block so that a tip contacts one end of the chain guide and adjusts the gap between one end of the chain guide and the support block when rotating; and a spring installed so that both ends are supported by one end of the chain guide and the support block.

When the above bolt is rotated, the chain guide rotates around the rotation axis, and when the chain guide rotates, the tension of the chain passing through the circumference of the chain guide is adjusted so that the tension is maintained by a spring.

The above tension adjustment unit is characterized by further including an auxiliary screw that is rotatably connected to the base frame by penetrating the chain guide and that can adjust the gap between one side of the chain guide and the support block when rotating, thereby additionally adjusting the tension of the chain by changing the spring force of the spring.

The tool changing area is provided with a positioning unit that further restricts movement of the gripper when exchanging a tool coupled to the spindle in the tool changing area; the positioning unit is characterized by directly restricting and fixing a coupling pin of a chain coupled to the gripper.

The above positioning unit is characterized by including a cylinder fixed to the base frame of the tool magazine in the tool exchange area; and a positioning guide connected to the cylinder, which moves forward and backward when the cylinder is operated and prevents movement of the gripper by restricting a chain located in the tool exchange area when a coupling pin of the chain is inserted into a restraining groove formed at the tip when the chain moves forward.

The above positioning unit is characterized by further including a guide bracket that is fixed to the base frame and comes into contact with the positioning guide to guide the forward and backward movement of the positioning guide.

The above positioning unit is characterized by further including a sensor bracket coupled to the positioning guide; and a sensor fixed to the base frame and detecting the sensor bracket when the positioning guide moves and generating a signal for controlling the operation of the cylinder.

The machine tool according to the present invention has a configuration in which a tool loading area for loading a tool into a gripper and a tool exchange area for exchanging a tool of a spindle are separated from each other at positions, so that when detecting a tool loaded into the gripper through a sensor, sensor detection errors due to processing chips or coolant dust can be prevented, thereby having the effect of preventing processing errors in advance.

In addition, the machine tool according to the present invention can prevent sagging of the gripper by always maintaining the tension of the chain at an appropriate tension using the tension adjustment unit, thereby preventing vibration and noise as well as breakage or damage to the tool. In particular, since the tension adjustment unit is provided at a position separate from the motor drive unit, there is an effect of maintaining the tension of the chain uniformly over the entire section of the chain.

In addition, the machine tool according to the present invention can prevent movement of the gripper by restraining the chain when exchanging tools of the spindle using the positioning unit provided in the tool exchange area, and in particular, the positioning unit is configured to directly restrain and fix the coupling pin of the chain located in the tool exchange area, thereby improving the precision of positioning and enabling accurate tool exchange, thereby achieving the effect of improving processing precision and stability.

Figure 1 is a drawing of a machine tool according to the present invention;
Figure 2 is a drawing of a tool magazine of a machine tool.
Figure 3 is a plan view of Figure 2;
Figure 4 is a drawing of the motor drive unit.
Figures 5 and 6 are drawings of a tension control unit according to the present invention.
Figures 7 and 8 are drawings before and after operation of the positioning unit according to the present invention.
Figure 9 is a drawing for explaining a configuration in which a tool loading area and a tool exchange area are separated from each other according to the present invention.
Figure 10 is a flow chart for explaining the process of loading a tool into an empty gripper in a tool loading area according to the present invention.
Figure 11 is a flowchart for explaining a process of exchanging a tool of a spindle in a tool exchange area according to the present invention.

Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing symbols, identical or similar components will be given the same reference numerals and redundant descriptions thereof will be omitted.

The suffixes "module" and "part" used for components in the following description are given or used interchangeably only for the convenience of writing the specification, and do not have distinct meanings or roles in themselves.

In describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiments disclosed in this specification, the detailed description is omitted.

In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The terms are used only to distinguish one component from another.

When it is said that a component is "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but there may also be other components present in between.

On the other hand, when it is said that a component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this specification, it should be understood that the terms “comprises” or “has” and the like are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

In addition, the unit or control unit included in names such as motor control unit (MCU) and hybrid control unit (HCU) are terms widely used to name control devices (Controller) that control vehicle-specific functions, and do not mean a generic function unit.

The controller may include a communication device that communicates with other controllers or sensors to control the functions it is responsible for, a memory that stores operating systems or logic commands and input/output information, and one or more processors that perform judgments, calculations, decisions, etc. necessary for controlling the functions it is responsible for.

Hereinafter, a machine tool according to a preferred embodiment of the present invention will be described with reference to the attached drawings.

The machine tool according to the present invention includes a bed (100), a table (200), a column (300), a spindle (400), a saddle (500), a tool magazine (600), and a transport unit (700), as shown in FIGS. 1 to 11.

The bed (100) is installed on the ground or base of the work site, serves as a support for processing the workpiece (10), and provides a space and support function for installing parts required for processing the workpiece (10).

A table (200) is installed on top of a bed (100), and a workpiece (10) is placed on the table (200).

The table (200) may be configured as a fixed table or a rotary table, and may move and rotate vertically, horizontally, and in height on top of the bed (100) as needed.

The column (300) is movably installed on the side or top of the bed (100), and for example, can be installed upward in the height direction with respect to the bed (300).

The column (300) can be moved horizontally or vertically on the upper part of the bed (100) by the column transfer unit (710) constituting the transfer unit (700).

The spindle (400) can be installed on the spindle (410), and the spindle (410) and the spindle (400) can be installed on the column (300) so as to be able to move up and down in the height direction.

The spindle (400) including the main shaft (410) can move the column (300) in the height direction along one side by the spindle feeder (720) constituting the feeder (700).

A tool (20) for machining a workpiece (10) is coupled to a spindle (400), and the workpiece (10) is machined by rotating the tool (20).

Through the up-and-down movement of the spindle (410) and the spindle (400), the tool (20) coupled to the spindle (400) and the tool (20) loaded in the gripper (620) of the tool magazine (600) can be exchanged with each other.

Additionally, to improve productivity, the spindle (400) may be configured in multiples, and up to eight may be installed as needed.

The saddles (500) are installed on the upper part of the bed (100) and perform the function of supporting the column (300). The saddles constituting the transfer part (700) are installed so as to be able to move horizontally and vertically on the upper part of the bed (100) by the transfer part (730).

The tool magazine (600) is equipped with a plurality of grippers (620) into which a plurality of tools (20) are loaded and stored, and the tools (20) loaded into the grippers (620) can be supplied to and mounted on the spindle (400) according to the machining program of the machine tool, etc.

The tool magazine (600) can be provided as an integral part with the column (300) or the saddle (500). For example, the base frame (610) of the tool magazine (600) can be formed as an integral part with or combined with the frame of the column (300) or the frame of the saddle (500). Through this, tool expandability is ensured, separation with respect to the spindle (410) is prevented, and the tool magazine (600) can be miniaturized and made lightweight, and high-speed movement of the column (300), the saddle (500), and the spindle (400) is enabled.

A tool magazine (600) according to the present invention includes a base frame (610), a plurality of grippers (620) into which tools (20) are loaded and stored, a chain (630) that integrally connects the plurality of grippers (620), and a motor drive unit (640) that is installed on the base frame (610) and connected to the chain (630) to generate power for movement of the chain (630).

The base frame (610) may be formed integrally with or combined with the frame of the column (300) or the frame of the saddle (500).

The base frame (610) may be formed in a circular or rectangular shape, and when formed in a rectangular shape, may have a straight section extending in a straight line and a curved section at the corner connecting the straight sections.

Tool exchange of the spindle (400) is performed in a straight section on the front side of the base frame (610), and the straight section on the front side of the base frame (610) where tool exchange is performed can be defined as a tool exchange area (A).

A tool (20) loaded and stored in the gripper (620) can be moved to the tool exchange area (A) of the base frame (610) and then exchanged with a tool (20) of the spindle (400).

A plurality of grippers (620) are provided to load and store a tool (20), and the plurality of grippers (620) are connected as one unit by a chain (630), and one tool (20) can be loaded and stored on each gripper (620).

A chain (630) connects a plurality of grippers (620) integrally and moves along a closed loop circulatory path along a guide provided on a base frame (610), and through the movement of the chain (630), a tool (20) loaded on a gripper (620) can be moved to a tool exchange area (A) of the base frame (610) where a spindle (400) is located.

The motor drive unit (640) may include a motor (641) that is fixed to the base frame (610) and generates rotational power for the rotational circulation of the chain (630), and a sprocket (642) to which the chain (630) is coupled and which rotates with the power of the motor (641).

The motor drive unit (640) can be installed in one curved section of the base frame (610) to easily generate rotational power.

An embodiment according to the present invention may be provided with a tension adjustment unit (800) for adjusting the tension of a chain (630) at a location spaced apart from a motor drive unit (640).

The tension adjustment unit (800) is installed on the base frame (610) of the tool magazine (600) and can adjust the tension of the chain (630).

The tension of the chain (630) may change due to ambient temperature, time, high-speed rotation of the gripper (620), mounting of a high-load tool (20), etc., and thus the tension of the chain (630) may loosen, causing the gripper (620) to sag.

In this way, if a change in tension occurs in the chain (630), vibration or noise occurs when the chain (630) moves, and in particular, if the gripper (620) sag occurs, tool exchange with the spindle (400) does not proceed properly, resulting in breakage or damage to the tool.

To prevent this, the embodiment according to the present invention enables the chain (630) to always maintain an appropriate tension through the tension adjustment unit (800), thereby preventing the gripper (620) from sagging.

The tension control unit (800) according to the present invention is provided at a position spaced apart from the motor drive unit (640). For example, the motor drive unit (640) may be installed in one curved section of the base frame (610) and the tension control unit (800) may be installed in the other curved section of the base frame (610) spaced apart from the motor drive unit (640).

In this way, when the tension control unit (800) is installed at a location separate from the motor drive unit (640), the tension of the chain (630) located far from the motor drive unit (640) can be maintained evenly.

A tension control unit (800) according to the present invention includes a chain guide (820) that is rotatably coupled to a base frame (610) about a rotation axis (810) in a curved section of a base frame (610) spaced apart from a motor driving unit (640), a support block (830) that is fixed to the base frame (610) and spaced apart from one end of the chain guide (820), a bolt (840) that penetrates the support block (830) so that its tip contacts one end of the chain guide (820) and adjusts the gap between one end of the chain guide (820) and the support block (830) when rotating, and a spring (850) that is installed so that both ends are supported by one end of the chain guide (820) and the support block (830).

When the bolt (840) is rotated, the chain guide (820) rotates around the rotation axis (810), and when the chain guide (820) rotates, the chain (630) passing through the circumference of the chain guide (820) is maintained in tension by the spring (850), so that the tension of the chain (630) is adjusted to an appropriate level.

In addition, the tension adjustment unit (800) according to the present invention may further include an auxiliary screw (860) that is rotatably connected to the base frame (610) by penetrating the chain guide (820) and that allows the gap between one side of the chain guide (820) and the support block (830) to be adjusted when rotating, thereby additionally adjusting the tension of the chain (630) through changes in the spring force of the spring (850).

The tension of the chain (630) can be further adjusted in microscopic units by enabling microscopic rotation of the chain guide (820) through the auxiliary screw (860).

The machine tool according to the present invention may further include a positioning unit (900) provided in a tool exchange area (A) and restricting movement of a gripper (620) when exchanging a tool (20) coupled to a spindle (400) in the tool exchange area (A).

The positioning unit (900) is installed on the base frame (610) of the tool magazine (600) and restrains the chain (630) to which the gripper (620) is coupled so that the chain (630) does not move when changing tools of the spindle (400) in the tool changing area (A).

Through this, the shaking of the gripper (620) loaded with the tool (20) in the tool exchange area (A) can be prevented, and the accuracy of the position of the tool (20) loaded on the gripper (620) when exchanging tools of the spindle (400) can be improved, thereby enabling accurate tool exchange, improving the reliability of the machine tool, and maximizing processing precision and stability.

An embodiment according to the present invention is characterized in that a positioning unit (900) is provided in a tool exchange area (A) and directly restrains and fixes a coupling pin (631) of a chain (630) coupled with a gripper (620), thereby improving the precision of positioning and enabling accurate tool exchange, thereby achieving the advantage of improving processing precision and stability.

Figure 7 shows the state before operation of the positioning unit (900), and Figure 8 shows the state after operation.

As described above, the positioning unit (900) according to the present invention includes a cylinder (910) fixed to a base frame (610) of a tool magazine (600) in a tool exchange area (A), and a positioning guide (920) connected to the cylinder (910) so as to move forward and backward when the cylinder (910) is operated, and to prevent movement of a gripper (620) by inserting a coupling pin (631) of a chain (630) into a restraining groove (921) formed at the tip when the chain moves forward, thereby restraining a chain (630) located in the tool exchange area (A).

The cylinder (910) is installed fixedly on the base frame (610) of the tool magazine (600) and spaced apart from one side of the chain (630) located in the tool exchange area (A), and may be composed of a pneumatic cylinder or a hydraulic cylinder.

The cylinder (910) has a cylinder rod that moves forward and backward when the cylinder (910) is in operation, and a positioning guide (920) is coupled to the cylinder rod to move forward and backward together with the cylinder rod.

A restraining groove (921) in the shape of a concave groove that is recessed inward is formed at the tip of the positioning guide (920). When the positioning guide (920) moves forward toward the chain (630), a connecting pin (631) connecting adjacent chains (630) is inserted into the restraining groove (921). Through this, the positioning guide (920) restrains the chain (630) located in the tool exchange area (A), thereby preventing movement of the gripper (620).

The positioning unit (900) according to the present invention may further include a guide bracket (930) that is fixed to the base frame (610) of the tool magazine (600) and comes into contact with the positioning guide (920) to guide the forward and backward movement of the positioning guide (920).

The guide bracket (930) may be installed so as to be positioned above the positioning guide (920) and come into contact with the upper surface of the positioning guide (920), and may also be installed so as to come into contact with the side surface of the positioning guide (920) as needed.

In addition, the positioning unit (900) according to the present invention may further include a sensor bracket (940) coupled to the positioning guide (920), and a sensor (950) fixed to the base frame (610) of the tool magazine (600) and detecting the sensor bracket (940) when the positioning guide (920) moves and generating a signal for controlling the operation of the cylinder (910).

The sensor (950) may be configured in multiple units for failsafe purposes and may be configured as a non-contact sensor.

The machine tool according to the present invention is characterized in that the tool loading area (B) for loading the tool (20) into the gripper (620) and the tool exchange area (A) for exchanging the tool (20) of the spindle (400) are separated from each other at a position apart from each other.

In the past, tool loading was performed with an empty gripper before the tool of the spindle was exchanged in the tool change area, and when the tool was loaded into the gripper, a sensor detected the tool loaded into the gripper to determine whether the tool was loaded into the gripper.

However, the tool change area coincides with the machining area where the tool coupled to the spindle processes the workpiece, and as a result, dust caused by machining chips and coolant may be generated in the tool change area, which may result in the sensor not being able to properly detect the tool loaded into the gripper when loading the tool in the tool change area.

In this case, the sensor may detect that the tool has been loaded even though the tool has not been loaded into the empty spindle, which may result in a sensing error, and the sensing error may also result in a machining error because the tool required for machining is not supplied to the spindle.

The present invention is characterized in that the tool loading area (B) for loading the tool (20) into the gripper (620) and the tool exchange area (A) for exchanging the tool (20) of the spindle (400) are separated from each other at positions that fundamentally block the sensing error of the sensor, thereby having the advantage of preventing machining errors in advance.

The machine tool according to the present invention is configured such that a tool loading area (B) is located on one side of the base frame (610) of a tool magazine (600) and a tool exchange area (A) is located in front of the base frame (610), thereby separating the tool loading area (B) and the tool exchange area (A) into different areas.

Figure 10 illustrates a flow chart of the process of loading a tool (20) into an empty gripper (620) in the tool loading area (B).

As shown, when a tool registration command occurs (step S1), a tool (20) is loaded into an empty gripper (620) in the tool loading area (B). (step S2)

The task of loading a tool (20) with an empty gripper (620) can be done manually by a worker or automatically using a machine.

When a tool (20) is loaded onto a gripper (620) in the tool loading area (B), a sensor detects the tool loaded onto the gripper (620) and recognizes the tool number (step S3), and the control panel determines whether the tool number loaded onto the gripper (620) and the tool number coupled to the spindle (400) are the same number (step S4).

If it is determined in the above step S4 that the numbers are not the same, the tool registration task of loading the tool (20) into the gripper (620) is completed (step S5). If it is determined that the numbers are the same, an error signal is generated and the tool registration task is stopped (step S6).

Figure 11 illustrates a flow chart of the process of exchanging a tool (20) of a spindle (400) in a tool exchange area (A).

As shown, when a tool change command is generated after the tool registration task is completed (step S11), the motor drive unit (640) operates under the control of the control panel and the chain (630) moves to call an empty gripper (620) matching the number of the tool (20) coupled to the spindle (400) to the tool change area (A). (step S12)

When the empty gripper (620) is called and moves to the tool exchange area (A), the positioning unit (900) located in the tool exchange area (A) operates to restrain the chain (630) located in the tool exchange area (A), thereby preventing the movement of the called gripper (620), and in this state, the tool (20) coupled to the spindle (400) is returned to the empty gripper (620) called to the tool exchange area (A). (Step S13)

After the return of the tool is completed, the chain (630) is released from restraint by the opposite operation of the positioning unit (900), and the motor drive unit (640) is operated by the control of the control panel, and the chain (630) moves so that another gripper (620) loaded with the tool (20) to be exchanged is called and moved to the tool exchange area (A). (Step S14)

After the gripper (620) loaded with the tool (20) to be exchanged is called to the tool exchange area (A), the chain (630) is restrained again by the operation of the positioning unit (900) to prevent movement of the gripper (620), and in this state, the tool (20) loaded on the gripper (620) is mounted on an empty spindle (400) to complete the tool exchange operation. (Steps S15 and S16)

As described above, the machine tool according to the present invention has a configuration in which the tool loading area (B) for loading the tool (20) into the gripper (620) and the tool exchange area (A) for exchanging the tool (20) of the spindle (400) are separated from each other at positions spaced apart from each other, so that when detecting the tool (20) loaded into the gripper (620) through the sensor, sensor detection errors due to processing chips or coolant dust can be prevented, thereby having the advantage of preventing processing errors in advance.

In addition, the machine tool according to the present invention can always maintain the tension of the chain (630) at an appropriate tension by using the tension adjustment unit (800), thereby preventing the sagging of the gripper (620), thereby preventing vibration and noise as well as breakage or damage to the tool, and in particular, since the tension adjustment unit (800) is provided at a position spaced apart from the motor drive unit (640), there is an advantage in that the tension of the chain (630) can be uniformly maintained over the entire section of the chain (630).

In addition, the machine tool according to the present invention can prevent movement of the gripper (620) by restraining the chain (630) when exchanging the tool (20) of the spindle (400) using the positioning unit (900) provided in the tool exchange area (A), and in particular, the positioning unit (900) is configured to directly restrain and fix the coupling pin (631) of the chain (630) located in the tool exchange area (A), thereby improving the precision of positioning and enabling accurate tool exchange, thereby having the advantage of improving processing precision and stability.

While the present invention has been illustrated and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that the present invention may be variously improved and modified without departing from the technical spirit of the invention as defined by the following claims.

10 - Workpiece 20 - Tool
100 - Bed 200 - Table
300 - Column 400 - Spindle
410 - Headstock 500 - Saddles
600 - Tool Magazine 610 - Base Frame
620 - Gripper 630 - Chain
631 - Coupling pin 640 - Motor drive unit
641 - Motor 642 - Sprocket
700 - Transfer section 710 - Column transfer section
720 - Spindle feed 730 - Saddle feed
800 - Tension adjustment unit 810 - Rotation shaft
820 - Chain guide 830 - Support block
840 - Bolt 850 - Spring
860 - Auxiliary screw 900 - Positioning unit
910 - Cylinder 920 - Positioning Guide
921 - Restraint Home 930 - Guide Bracket
940 - Sensor Bracket 950 - Sensor
A - Tool exchange area B - Tool loading area

Claims (10)

A tool magazine having a plurality of grippers for storing tools; and
A tool for machining a workpiece is combined and includes a spindle for rotating the tool;
A machine tool characterized in that a tool loading area for loading a tool into the gripper and a tool changing area for changing a tool of the spindle are separated from each other at positions spaced apart from each other. In claim 1,
A machine tool characterized in that the tool loading area and the tool changing area are positioned apart from each other on one side and in front of the tool magazine. In claim 1,
The above tool magazine includes a chain combined with a gripper and a motor drive unit connected to the chain to generate power for moving the chain;
A machine tool characterized in that it is provided with a tension adjustment unit for adjusting the tension of a chain at a position separated from the motor drive unit. In claim 3,
The above tension adjustment unit is a chain guide that is rotatably connected to the base frame of the tool magazine about a rotation axis at a position separate from the motor drive unit;
A support block fixed to the base frame and spaced apart from one end of the above chain guide;
A bolt that penetrates the above support block, contacts one end of the chain guide, and adjusts the gap between one end of the chain guide and the support block when rotating; and
A machine tool characterized by including a spring installed so that both ends are supported by one end of the chain guide and a support block. In claim 4,
A machine tool characterized in that when the above bolt is rotated, the chain guide rotates around the rotation axis, and when the chain guide rotates, the tension of the chain passing around the chain guide is adjusted so that the tension is maintained by a spring. In claim 4,
A machine tool characterized in that the tension adjustment unit further includes an auxiliary screw that is rotatably connected to the base frame by penetrating the chain guide and that can adjust the gap between one side of the chain guide and the support block when rotating, thereby additionally adjusting the tension of the chain by changing the spring force of the spring. In claim 1,
Further comprising a positioning unit provided in the tool changing area and restraining the movement of the gripper when exchanging a tool coupled to a spindle in the tool changing area;
A machine tool characterized in that the above positioning unit directly restrains and fixes the coupling pin of the chain coupled with the gripper. In claim 7,
The above positioning unit is a cylinder fixed to the base frame of the tool magazine in the tool exchange area; and
A machine tool characterized by including a positioning guide which is connected to the cylinder, moves forward and backward when the cylinder is in operation, and prevents movement of the gripper by restricting the chain located in the tool change area by inserting the chain's engaging pin into a restraining groove formed at the tip when the chain moves forward. In claim 8,
A machine tool characterized in that the above positioning unit further includes a guide bracket that is fixed to the base frame and contacts the positioning guide to guide the forward and backward movement of the positioning guide. In claim 8,
The above positioning unit comprises a sensor bracket coupled to a positioning guide; and
A machine tool further comprising a sensor fixed to the base frame and detecting the movement of the positioning guide when the sensor bracket is moved and generating a signal for controlling the operation of the cylinder.

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