CROSS-REFERENCE TO RELATED APPLICATIONS

This application is the U.S. National Phase under 35 U.S.C. § 371 of International Application No. PCT/KR2018/012890 filed on Oct. 29, 2018, which in turn claims the benefit of Korean Application No. 10-2017-0154627, filed on Nov. 20, 2017, the disclosures of which are incorporated by reference into the present application.

FIELD OF THE DISCLOSURE

The present disclosure relates to a device for attaching and detaching tools in a magazine, and more particularly, to a device for attaching and detaching tools in a magazine of a machine tool, the device being capable of attaching or detaching a tool having directionality to or from each gripper of the magazine of the machine tool while accurately adjusting a fixed position of the tool.

BACKGROUND OF THE DISCLOSURE

In general, a machine tool refers to a machine used to process metal/non-metal workpieces in a desired shape and dimension using a suitable tool by using various types of cutting or non-cutting methods.

Various types of machine tools including a turning center, a vertical/horizontal machining center, a door-type machining center, a Swiss turning machine, an electric discharge machine, a horizontal NC boring machine, a CNC lathe and a multi-tasking machining center are being widely used in various industrial sites to suit the purpose of the corresponding work.

The multi-tasking machining center, among the machine tools, refers to a turning center equipped with a multifunctional automatic tool changer (ATC) and a tool magazine in order to perform various types of processing such as turning machining, drilling, tapping, or milling. In the case of the multi-tasking machining center, an operator manually mounts a tool on a tool magazine when loading the tool required for machining or changing the tools.

In general, various types of currently used machine tools each have a control panel to which a numerical control (NC) technology or a computerized numerical control (CNC) technology is applied. The control panel is provided with a multifunctional switch or button, and a monitor.

In addition, the machine tool includes a table on which a material, i.e., a workpiece is seated and which transfers the workpiece to machine the workpiece, a palette used to prepare the workpiece to be machined, a main shaft coupled to a tool or the workpiece and configured to be rotated, and a tailstock and a steady rest configured to support the workpiece during machining.

In general, the machine tool is provided with a transfer unit configured to transfer the table, a tool post, the main shaft, the tailstock, and the steady rest along a transfer shaft in order to perform various types of machining.

In general, the machine tool uses a plurality of tools in order to perform various types of machining, and a tool magazine or a turret is used in the form of a tool storage place for receiving and storing the plurality of tools.

The machine tool uses the plurality of tools in order to perform various types of machining, and the tool magazine is used in the form of a tool storage place for receiving and storing the plurality of tools.

In general, the machine tool is equipped with the automatic tool changer (ATC) configured to withdraw a specific tool from the tool magazine or remount the tool on the tool magazine based on an instruction of a numerical control unit in order to improve productivity of the machine tool.

In general, the machine tool is equipped with an automatic palette changer (APC) in order to minimize the non-processing time. The automatic palette changer (APC) automatically changes the palettes between a workpiece machining region and a workpiece loading region. The workpiece may be mounted on the palette.

In general, the tool magazine of the machine tool is provided with a gripper installed at one side of a chain, the chain is installed between a driving sprocket and an idle sprocket, and the chain moves as the driving sprocket operates.

In the related art, a tool having directionality is not mounted on the gripper of the tool magazine of the machine tool in a state wherein a fixed position of the tool is accurately determined. For this reason, there is a problem in that the tool or a workpiece is damaged during the operation of the machine tool, which causes an increase in processing costs and a deterioration in precision when machining the workpiece.

In addition, the device for attaching and detaching tools in a magazine in the related art merely attaches or detaches a tool to or from the gripper of the magazine and cannot quickly determine directionality of the tool. Thus, an operator needs to carefully adjust the directionality of the tool while holding the tool with one hand in order to manually attach or detach the tool to or from the magazine, which causes an increase in time taken to attach or detach the tool and causes an increase in non-processing time. For this reason, there is a problem in that productivity of the machine tool deteriorates.

Moreover, in the case of the device for attaching and detaching tools in a magazine in the related art, the heavy tool, which is a heavy item, may be dropped or withdrawn while the operator attaches or detaches the tool to or from the gripper while adjusting the directionality of the relatively heavy tool. For this reason, there are problems in that a safety accident to the operator occurs and thus impairs the operator's safety. If a set of two or more operators performs work together in order to prevent the problem, an increase in costs and inconvenience of the operators.

Furthermore, the device for attaching and detaching tools in a magazine in the related art cannot be miniaturized because the device uses a cam. For this reason, there is a problem in that the large size of the device results in a great limitation in terms of an installation space for the device. In addition, because such a device cannot be installed in various machine tools, there is a problem in that a distribution rate of the device is reduced. Further, because of the large size of the device, there is a problem in that working time and manufacturing costs increase, and a distance between an operating mechanism and a power transmission mechanism of the device is increased, which causes a deterioration in safety and durability during the operation of the device.

DISCLOSURE

Summary

The present disclosure has been made in an effort to solve the above-mentioned problems, and an object of the present disclosure is to provide a device for attaching and detaching tools in a magazine, wherein a fixed position of a tool having directionality is accurately adjusted with respect to the magazine of the machine tool and then the tool is easily attached to or detached from each of the grippers of the magazine, by operations of first and second gears of a driving unit and a turning operation of a base of a manipulation unit, and as a result, it is possible to improve productivity and precision when machining a workpiece, reduce maintenance costs by preventing damage to the workpiece or the tool, improve rigidity and durability by decreasing a clearance and minimizing a length of the base by the configuration wherein the gears of the driving unit are operated, make it easy to mount the device on magazines of various machine tools because of reduction in size of the device, improve an operator's safety and convenience, and improve reliability and safety of the machine tool because of a stable operation thereof. In order to achieve the object of the present disclosure, a device for attaching and detaching tools in a magazine according to the present disclosure includes: a housing unit having a plurality of grippers configured to clamp a tool by pressing fingers, the housing unit having a main body part installed on a support frame of the magazine; a driving unit rotatably installed on the main body part and configured to apply pressure to the fingers of the gripper or release the fingers; and a manipulation unit turnably installed on the main body part and configured to provide rotational power to the driving unit, wherein the device is capable of adjusting a fixed position of the tool to be clamped by the gripper, while attaching or detaching the tool to or from the gripper by turning the manipulation unit.

In addition, according to another exemplary embodiment of the device for attaching and detaching tools in a magazine according to the present disclosure, the driving unit of the device for attaching and detaching tools in a magazine may include: a first rotary shaft installed to be coupled to a part of the main body part; a first gear installed on the first rotary shaft and configured to rotate in a direction equal to a direction wherein the manipulation unit is turned; a second rotary shaft installed on a part of the main body part so as to be in parallel with and spaced apart from the first rotary shaft; and a second gear installed on the second rotary shaft and configured to engage with the first gear and rotate in a direction opposite to the direction wherein the first gear rotates.

In addition, according to another exemplary embodiment of the device for attaching and detaching tools in a magazine according to the present disclosure, the first gear of the device for attaching and detaching tools in a magazine may include a first pressing portion provided at a lower portion of the first gear and configured to press the finger of the gripper, and the second gear may include a second pressing portion provided at a lower portion of the second gear and configured to press the fingers of the gripper in conjunction with the first pressing portion.

In addition, according to another exemplary embodiment of the device for attaching and detaching tools in a magazine according to the present disclosure, the driving unit of the device for attaching and detaching tools in a magazine may further include: a third rotary shaft installed on a part of the main body part so as to be in parallel with and spaced apart from the first rotary shaft and the second rotary shaft; and a third gear installed on the third rotary shaft and configured to engage with the second gear and rotate in a direction opposite to the direction wherein the second gear rotates.

In addition, according to another exemplary embodiment of the device for attaching and detaching tools in a magazine according to the present disclosure, the manipulation unit of the device for attaching and detaching tools in a magazine may include: a connecting part connected to the first rotary shaft or the third rotary shaft; a base installed to be coupled to the connecting part; a positioning part provided at a lower portion of the base and configured to adjust a fixed position of the tool to be clamped by the gripper; and a catching part provided at the lower portion of the base so as to be spaced apart from the positioning part and configured to restrict a turning angle of the base.

In addition, according to another exemplary embodiment of the device for attaching and detaching tools in a magazine according to the present disclosure, the manipulation unit of the device for attaching and detaching tools in a magazine may further include a detection part configured to detect whether the base is turned.

In addition, according to another exemplary embodiment of the device for attaching and detaching tools in a magazine according to the present disclosure, the housing unit of the device for attaching and detaching tools in a magazine may include a stopper installed at one side of the main body part and configured to restrict the turning angle of the base by coming into contact with the catching part when the base is turned.

In addition, according to another exemplary embodiment of the device for attaching and detaching tools in a magazine according to the present disclosure, the stopper of the device for attaching and detaching tools in a magazine may include: a coupling portion coupled to one side of the main body part; and a bent portion extending from one end of the coupling portion so as to be bent in a direction wherein the base is turned.

According to the device for attaching and detaching tools in a magazine according to the present disclosure, the fixed position of the tool having directionality is accurately adjusted with respect to the magazine of the machine tool, and then the tool is easily attached to or detached from each of the grippers of the magazine, by the operations of the first and second gears of the driving unit and the turning operation of the base of the manipulation unit. As a result, it is possible to improve precision when machining the workpiece, quickly adjust the fixed position of the tool, minimize the non-processing time, and improve productivity of the machine tool.

In addition, according to the device for attaching and detaching tools in a magazine according to the present disclosure, the fixed position of the tool having directionality is accurately adjusted with respect to the magazine of the machine tool and then the tool is attached to or detached from the gripper, such that it is possible to prevent the tool from being placed at an incorrect tool position and thus to prevent the workpiece or the tool from being damaged during the machining. As a result, it is possible to reduce costs required to maintain the machine tool and maximize reliability and stability of the machine tool.

Further, according to the device for attaching and detaching tools in a magazine according to the present disclosure, a clearance may be decreased and a length of the base may be minimized by the configuration wherein the gears of the driving unit are operated, thereby improving rigidity and durability.

Furthermore, according to the device for attaching and detaching tools in a magazine according to the present disclosure, it is possible to make it easy to mount the device on magazines of various machine tools because of the reduction in size of the device, improve a distribution rate of the device, and maximize safety and convenience of operators.

