US-12623302-B2 - Machine tool

US12623302B2US 12623302 B2US12623302 B2US 12623302B2US-12623302-B2

Abstract

The present disclosure relates to a machine tool including a bed, a table tiltably installed on the bed and configured such that a workpiece is seated on the table, a saddle movably installed on the bed, a column movably installed on the saddle, a spindle movably and tiltably installed on the column and configured to clamp or unclamp a tool and process a workpiece, and a stacking unit configured to perform stacking processing on the workpiece, in which the stacking unit is detachably mounted on the spindle while substituting for a tool to be clamped to the spindle and changing a mounting position of the stacking unit depending on a stacking processing position of the workpiece.

Inventors

Seonghoon Jeong

Assignees

DN SOLUTIONS CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20210422
Priority Date: 20200429

Claims (8)

1 . A machine tool comprising: a bed; a table tiltably installed on the bed and configured such that a workpiece is seated on the table; a saddle movably installed on the bed; a column movably installed on the saddle; a spindle movably and tiltably installed on the column and configured to clamp or unclamp a tool and process a workpiece; a stacking unit configured to perform stacking processing on the workpiece; and a storage unit configured to store the stacking unit and change the mounting position of the stacking unit in case of mounting the stacking unit on the spindle, wherein the stacking unit is detachably mounted on the spindle while substituting for a tool to be clamped to the spindle and changing a mounting position of the stacking unit depending on a stacking processing position of the workpiece, wherein the stacking unit comprises: an optic part configured to perform laser stacking processing on the workpiece; a support part having one side coupled to the optic part; and a mounting part installed at the other side of the support part and detachably coupled to a tool clamping part provided on the spindle.
2 . The machine tool of claim 1 , comprising: a transfer unit configured to transfer the saddle, the column, and the spindle.
3 . The machine tool of claim 2 , comprising: a control unit configured to control operations of the transfer unit, the stacking unit, and the storage unit to automatically change the mounting position of the stacking unit in case of mounting the stacking unit on the spindle in accordance with the stacking processing position of the workpiece and the order of the stacking processing.
4 . The machine tool of claim 1 , wherein the storage unit comprises: a base part provided on the bed or the table and extending in a height direction; a cam box part installed on the base part; a shaft part having one side rotatably installed on the cam box part; and a change part installed at the other side of the shaft part and configured to be rotatable in conjunction with the shaft part and hold the stacking unit.
5 . The machine tool of claim 4 , wherein the cam box part comprises: a housing part; a cam follower installed on the housing part and configured to restrict and guide a rotation angle of the change part; and a driving part installed on the housing part and generate power for rotating the cam follower.
6 . The machine tool of claim 5 , wherein a process of clamping or unclamping the stacking unit held by the change part to or from the tool clamping part is performed as the spindle moves forward or rearward toward or away from the change part after the spindle tilts to be parallel to the mounting part held by the change part.
7 . The machine tool of claim 6 , wherein to perform the stacking processing on a first stacking processing position by the stacking unit, the change part holding the stacking unit rotates to a first preparation position, the spindle moves to the change part after tilting, and the stacking unit is clamped to the spindle so that the stacking unit is positioned at a first mounting position.
8 . The machine tool of claim 6 , wherein to perform the stacking processing on a second stacking processing position by the stacking unit, the change part holding the stacking unit rotates to a second preparation position, the spindle moves to the change part after tilting, and the stacking unit is clamped to the spindle so that the stacking unit is positioned at a second mounting position.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is the U.S. National Phase under 35 U.S.C. § 371 of International Application No. PCT/KR2021/005107 filed on Apr. 22, 2021, which in turn claims the benefit of Korean Application No. 10-2020-0052944, filed on Apr. 29, 2020, the disclosures of which are incorporated by reference into the present application. FIELD OF THE DISCLOSURE The present disclosure relates to a machine tool, and more particularly, to a machine tool in which a stacking unit is detachably mounted on a spindle while substituting for a tool to be clamped to the spindle and changing, by a storage unit, a mounting position of the stacking unit depending on a stacking processing position of a workpiece, thereby minimizing interference, expanding a stacking processing area, and maximizing productivity. 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 to suit the purpose of the corresponding work in various industrial sites. 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, 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 a machining process 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 spindle 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 the machining process. In general, the machine tool is provided with a transfer unit configured to transfer the table, a tool post, the spindle, the tailstock, and the steady rest along a transfer shaft in order to perform various types of machining operations. Further, the machine tool uses a plurality of tools in order to perform various types of machining operations, 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. Further, the machine tool is generally equipped with an automatic palette changer (APC) in order to minimize the non-machining 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 addition, 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, a machining center refers to a machine tool that has the automatic tool changer and changes various types of tools to perform various types of machining that may be performed by lathes, milling machines, drilling machines, boring machines, and the like. The machining center is mainly classified into a horizontal machining center and a vertical machining center in which a spindle is vertically mounted. The vertical machining center may include a bed, a saddle installed above the bed, a table installed on the saddle and configured to allow a workpiece to be placed on the table, a column vertically mounted behind the bed, a spindle mounted on the column, a power transmission system configured to operate the spindle, and an electronic control system configured to control the operation of the spindle. The vertical machining center may further include an automatic tool changer, and a headstock configured to clamp a tool magazine and a tool. In addition, the machining center is generally subdivided into a column moving type machining center, a saddle moving type machining center, and a ram type machining center. In general, the column movin