Long boring bar device for machine tools

Abstract

The long boring bar device of the machine tool according to the present application includes a turret for accommodating a plurality of tools, and a boring bar unit installed on the turret, the boring bar unit including a holder detachably coupled to the turret, a boring bar clippably or releasably coupled to the holder, and a head tool clippably or releasably coupled to the boring bar, and by automatically replacing the head tool using an automatic tool changer, non-processing time caused by disassembly and assembly of the boring bar or the head tool can be reduced, productivity of the machine tool can be greatly improved, and when the long boring bar is not used, the long boring bar device is simply separated from the turret to prevent interference between devices that can occur during processing, thereby improving safety and reliability of the machine tool.

Description

TECHNICAL FIELD

[0001] The present invention relates to a long boring bar device of a machine tool, and more particularly, to a long boring bar device of a machine tool in which a boring bar is detachably coupled to a holder, and a head tool is detachably coupled to the boring bar, so that non-processing time can be reduced and productivity of the machine tool can be improved by automatically replacing the head tool using an automatic tool changer. BACKGROUND

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

[0003] Various kinds of machine tools such as a turning center, a vertical / horizontal machining center, a portal machining center, a gang tool, an electric discharge machining machine, a horizontal NC drill, a CNC lathe, a compound processing machine, etc. are widely used in various industrial sites according to the purpose of the corresponding work.

[0004] The compound processing machine in the machine tool refers to a turning center equipped with a tool magazine and a multi-functional automatic tool changer (ATC) performing various processes having different processing modes such as turning processing, drilling processing, tapping processing, and milling processing. In the compound processing machine, a worker manually mounts a tool on the tool magazine when loading or exchanging a tool required for processing.

[0005] Generally, the various machine tools currently used are provided with a control console applying numerical control (NC) or computerized numerical control (CNC) technology. Such a control console is provided with various function switches or buttons and a monitor.

[0006] In addition, the machine tool is provided with a transfer table for placing a workpiece, i.e., a material, and transferring the workpiece for processing, a pallet for preparing the workpiece before processing, a spindle coupled to a tool or a workpiece to rotate, a tailstock for supporting the workpiece during processing, a shockproof device, etc.

[0007] Generally, in the machine tool, the transfer table, the tool holder, the spindle, the tailstock, the shockproof device, etc. are provided with a transfer unit transferred along a transfer axis to perform various processes.

[0008] In addition, generally, in order to perform various processes, the machine tool uses a plurality of tools, and uses a tool magazine or a turret in the form of a tool storage place accommodating and storing the plurality of tools.

[0009] In order to perform various processes, the machine tool uses a plurality of tools, and uses a tool magazine in the form of a tool storage place accommodating and storing the plurality of tools.

[0010] Generally, in order to improve productivity of a machine tool, the machine tool is provided with an automatic tool changer (ATC) which extracts or accommodates a specific tool from a tool magazine by a command of a numerical control unit.

[0011] In addition, generally, in order to minimize non-processing time, the machine tool is provided with an automatic palette changer (APC). The automatic palette changer (APC) automatically exchanges a palette between a workpiece processing area and a workpiece setting area. The palette can load a workpiece.

[0012] In addition, generally, the machine tool is roughly classified into a turning center and a machining center according to a processing method. Among them, the turning center is provided with a turret tool holder which can install many tools and index a tool necessary during processing.

[0013] As shown in FIG. 1, the machine tool, particularly the turning center, accommodates a plurality of tools in a turret 2 in order to smoothly process a workpiece and improve productivity. Figures 1 to 2

[0014] The turret 2 is rotated by a driving device. That is, the turret is rotated by the driving device, so that a necessary tool can be selected according to a processing procedure of the machine tool for a workpiece 7.

[0015] As shown in FIG. 2, in the machine tool such as the turning center, the workpiece 7 is rotated by a driving device such as a servo motor in a state where the workpiece 7 is clamped by a chuck 6. In this case, in order to process an inner diameter or an outer diameter of the workpiece, a boring bar 3 is used. Figure 1 As the machine tool of the existing turning center, the boring bar cannot be directly coupled to the turret, so that, after the turret is installed in a holder 4 with a plurality of bolts, the boring bar 3 is installed in the holder 4, so that the inner diameter or the outer diameter of the workpiece 7 is processed.

[0016] In addition, as in the machine tool of the existing turning center, as shown in FIG. 3, an outer diameter tool holder 9 is installed in the turret 2, and an outer diameter tool 8 is used to process an outer diameter of the workpiece or the like.

[0017] Figure 2 As shown in FIG. 4, in the long boring bar device of the existing machine tool, since the holder needs to be installed or detached from the turret with a plurality of bolts, there is a problem in that a lot of time is required, and productivity is reduced.

[0018] Figure 1 As shown in FIG. 4, in the long boring bar device of the existing machine tool, since the holder needs to be installed or detached from the turret with a plurality of bolts, there is a problem in that a lot of time is required, and productivity is reduced.

[0019] ​​​Further, in the long boring bar device of the existing machine tool, since a pipe must be additionally installed to supply cutting oil to the tool tip formed at the front end of the boring bar, there is a problem in that miniaturization of the device cannot be pursued, space utilization is reduced, the equipment becomes complicated, and manufacturing costs increase.

[0020] Further, as shown in Figure 2 the long boring bar device of the existing machine tool, when the long boring bar is not used (when another tool is used to machine a workpiece), the long boring bar interferes with and collides with other devices, and thus there is a problem in that the equipment is damaged, resources are wasted, and safety accidents occur. In order to prevent such a problem, the long boring bar is detached from the turret when the long boring bar is not used, but at this time, many bolts must also be loosened, which will cause problems in that it takes time and is inconvenient for workers.

[0021] Further, in the long boring bar device of the existing machine tool, when the tool tip of the long boring bar needs to be replaced due to frequent machining, the tool tip cannot be automatically replaced alone, and it takes a lot of time to replace the tool tip, and thus there is a problem in that work efficiency decreases as non-machining time increases, machining costs increase, and machining accuracy decreases.

[0022] Therefore, there is an urgent need to develop a long boring bar device of a machine tool in which the long boring bar is a device that can simply attach or detach a turret to or from a holder, and can simply automatically or manually attach or detach the long boring bar to or from the holder, and can automatically attach or detach a tool head to or from the long boring bar when the tool head needs to be replaced, in order to perform replacement. SUMMARY

[0023] TECHNICAL PROBLEM

[0024] The present application is proposed to solve the above problems, and aims to provide a long boring bar device of a machine tool in which a boring bar is detachably coupled to a holder through a first clamping portion, and a head tool is automatically detachably attached to the boring bar through a second clamping portion, so that when the head tool needs to be replaced, the head tool is automatically replaced by an automatic tool changer, thereby reducing non-working time due to attachment or detachment of the boring bar or attachment or detachment of the head tool, and greatly improving productivity of the machine tool, and in addition, when the long boring bar is not used, the long boring bar device can be simply separated from the turret to prevent collision due to interference between devices that can occur during machining, thereby improving safety and reliability of the machine tool, and supplying hydraulic pressure, air pressure, and cutting oil through a flow path formed in the inside of the long boring bar, thereby pursuing miniaturization of the device, increasing convenience for workers, and improving productivity of the machine tool.

[0025] TECHNICAL SOLUTION

[0026] To achieve the object of the present invention, a long boring bar device of a machine tool according to the present invention, wherein a turret for accommodating a plurality of tools can be included, and a boring bar unit installed on the turret, the boring bar unit having a holder detachably coupled to the turret, a boring bar clippable or unclippable coupled to the holder, and a head tool clippable or unclippable coupled to the boring bar.

[0027] Further, as a preferred other embodiment of the long boring bar device of a machine tool according to the present invention, the holder of the long boring bar device of a machine tool can include a housing portion having a first accommodation groove at one side, a first clamping portion formed in the inside of the housing portion adjacent to the first accommodation groove for clamping or unclamping the boring bar, an inflow portion formed at the other side of the housing portion for supplying hydraulic and pneumatic pressures to the inside of the housing portion, and an outflow portion formed at the one side of the housing portion in communication with the inflow portion for discharging the hydraulic and pneumatic pressures flowing into the inside of the housing portion to the outside of the housing portion.

[0028] Further, as a preferred other embodiment of the long boring bar device of a machine tool according to the present invention, the boring bar of the long boring bar device of a machine tool can include a main body portion having a second accommodation groove at one side, a second clamping portion formed in the inside of the main body portion adjacent to the second accommodation groove for clamping or unclamping the head tool, a connection portion formed at the other side of the main body portion so as to be in communication with the outflow portion when the boring bar is clamped by the holder to supply the hydraulic and pneumatic pressures discharged from the outflow portion to the inside of the main body portion, and a tool shank portion formed at the other side of the main body portion to be combined with the first clamping portion when the boring bar is clamped by the holder.

[0029] Further, as a preferred other embodiment of the long boring bar device of a machine tool according to the present invention, the head tool of the long boring bar device of a machine tool can include a machining portion for machining the inner diameter or the outer diameter of a workpiece, and a combination portion formed at the other side of the machining portion to be combined with the second clamping portion when the head tool is clamped by the boring bar.

[0030] Further, as a preferred other embodiment of the long boring bar device of a machine tool according to the present invention, the first clamping portion of the holder of the long boring bar device of a machine tool can include a rotating portion rotatably inserted into the housing portion, a first cylinder moving forward or backward with respect to the tool shank portion according to the rotating direction of the rotating portion, and a first locking portion provided to be revolvable along a first inclined surface formed at one side of the first cylinder.

[0031] Also, as a preferred other embodiment of the long boring bar device of the machine tool according to the present application, the tool shank portion of the boring bar of the long boring bar device of the machine tool can be provided with a first mounting groove recessed in the inner circumferential surface of the other side of the tool shank portion; the boring bar and the holder are moved forward with respect to the tool shank portion by rotation of the first cylinder through the rotation portion, whereby the first locking portion formed in the front end of one side of the first locking portion is clamped by being engaged into the first mounting groove while being rotated along the first inclined surface.

[0032] Also, as a preferred other embodiment of the long boring bar device of the machine tool according to the present application, the main body portion of the boring bar of the long boring bar device of the machine tool can include a first flow path portion that is communicated with the connection portion and is formed through the inside of the main body portion, and a second flow path portion that is communicated with the connection portion and is formed through the inside of the main body portion.

[0033] Also, as a preferred other embodiment of the long boring bar device of the machine tool according to the present application, the second clamping portion of the boring bar of the long boring bar device of the machine tool can include a second cylinder that is moved forward or backward with respect to the coupling portion by hydraulic pressure flowing in from the first flow path portion or the second flow path portion, and a second locking portion that is provided to be rotatable along a second inclined surface formed in one side of the second cylinder.

[0034] Also, as a preferred other embodiment of the long boring bar device of the machine tool according to the present application, the coupling portion of the head tool of the boring bar unit of the long boring bar device of the machine tool can include a second mounting groove recessed in the inner circumferential surface of the other side of the coupling portion.

[0035] Also, as a preferred other embodiment of the long boring bar device of the machine tool according to the present application, the head tool and the boring bar of the boring bar unit of the long boring bar device of the machine tool can be clamped by being engaged into the second mounting groove while being rotated along the second inclined surface of the second locking portion formed in the front end of one side of the second locking portion as the second cylinder is moved forward by hydraulic pressure flowing in from the first flow path portion, and can be released from the second mounting groove while being rotated along the second inclined surface of the second locking portion as the second cylinder is moved backward by hydraulic pressure flowing in from the second flow path portion.

[0036] Also, as a preferred other embodiment of the long boring bar device of the machine tool according to the present application, the main body portion of the boring bar of the long boring bar device of the machine tool can be provided with a third flow path portion that is communicated with the connection portion and is formed through the inside of the main body portion, in order to supply air pressure for confirming whether the head tool and the boring bar are clamped normally.

[0037] Moreover, as a preferred other embodiment of the long boring bar device of the machine tool according to the present application, the main body portion of the boring bar of the long boring bar device of the machine tool can be provided with a fourth flow path portion that communicates with the connection portion and is formed through the inside of the main body portion in order to supply air pressure for washing the second clamping portion and the second accommodating groove when the head tool is replaced.

[0038] Moreover, as a preferred other embodiment of the long boring bar device of the machine tool according to the present application, the main body portion of the boring bar of the long boring bar device of the machine tool can be provided with a fifth flow path portion that communicates with the connection portion and is formed through the inside of the main body portion in order to supply cutting oil supplied to the inside of the housing portion through the inflow portion and discharged to the outside of the housing portion through the outflow portion to the head tool.

[0039] Effects of Invention

[0040] In the long boring bar device of the machine tool according to the present application, the following effects are obtained; since the boring bar is detachably mounted on the holder by a simple rotation operation of the rotation portion of the first clamping portion, the convenience of the worker can be increased, and when the long boring bar is not used, the maintenance time and cost due to damage of the equipment caused by collision due to interference of the long boring bar with other equipment can be reduced, and resource waste is prevented, and the processing cost is reduced.

[0041] In addition, in the long boring bar device of the machine tool according to the present application, the following effects are obtained; since the head tool is automatically detachably coupled to the boring bar by the second clamping portion that operates by air pressure supplied through the first flow path portion and the second flow path portion formed in the inside of the boring bar, when the head tool needs to be replaced, the head tool is automatically replaced using an automatic tool changer or the like, so that non-processing time can be minimized, the productivity of the machine tool is greatly improved, and the processing accuracy is increased.

[0042] Moreover, in the long boring bar device of the machine tool according to the present application, the following effects are obtained; whether the head tool and the boring bar are clamped or released is confirmed by air pressure supplied by the third flow path portion, so that misoperation can be prevented, and safety and reliability are improved.

[0043] In addition, in the long boring bar device of the machine tool according to the present application, the following effects are obtained; hydraulic pressure, air pressure, and cutting oil are supplied through the flow path formed in the inside of the boring bar, so that miniaturization of the device can be achieved, manufacturing cost and manufacturing time can be reduced, and space utilization can be greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 Conceptual diagram showing a conventional long boring bar device of a machine tool.

[0045] Figure 2 This is a conceptual diagram illustrating a collision caused by interference in the state of an existing long boring bar device being installed.

[0046] Figure 3 A conceptual diagram of a machine tool is shown with the long boring bar device according to the invention installed.

[0047] Figure 4 A perspective view of a long boring bar device for a machine tool according to the present invention is shown.

[0048] Figure 5 Show Figure 4 An exploded perspective view of the long boring bar device of the machine tool shown.

[0049] Figure 6 A rear perspective view of the retainer of the long boring bar device of the machine tool according to the present invention is shown.

[0050] Figure 7 A cross-sectional view of the long boring bar device of the machine tool according to the present invention is shown.

[0051] Figure 8 Show Figure 7 An enlarged view of part A shown.

[0052] Figure 9 Show Figure 7 An enlarged view of part B shown.

[0053] Figure 10 A transparent perspective view of a long boring bar device for a machine tool according to the present invention is shown. Detailed Implementation

[0054] The following is a detailed description of a long boring bar device for a machine tool according to an embodiment of the present invention. The embodiments described below are provided as examples to fully convey the spirit of the invention to those skilled in the art. Therefore, the present invention is not limited to the embodiments described below and can be embodied in other forms. Furthermore, in the figures, the size and thickness of the device are shown enlarged for convenience. Throughout the specification, the same reference numerals denote the same constituent elements.

[0055] The advantages, features, and techniques of this invention, as well as the embodiments described below, will become clear from the accompanying drawings. However, this invention is not limited to the following embodiments and can be embodied in various other forms. These embodiments make the disclosure of this invention more complete and provide a full scope of the invention to those skilled in the art. Throughout the specification, the same reference numerals denote the same constituent elements. For clarity, the dimensions and relative dimensions of layers and regions in the figures are shown enlarged.

[0056] The terminology used in this specification is for illustrative purposes and does not limit the invention. Unless otherwise specified in this specification, the singular forms also include the plural forms. The terms "comprise" and / or "comprising" as used in this specification mean that the mentioned constituent elements, steps, actions, and / or components do not exclude the presence or addition of more than one other constituent element, step, action, and / or component.

[0057] Figure 3 A conceptual diagram of a machine tool is shown with the long boring bar device according to the invention installed. Figure 4 A perspective view of a long boring bar device for a machine tool according to the present invention is shown. Figure 5 Show Figure 4 An exploded perspective view of the long boring bar device of the machine tool shown. Figure 6 A rear perspective view of the retainer of the long boring bar device of the machine tool according to the present invention is shown. Figure 7 A cross-sectional view of the long boring bar device of the machine tool according to the present invention is shown. Figure 8 Show Figure 7 An enlarged view of part A shown. Figure 9 Show Figure 7 An enlarged view of part B shown. Figure 10 A transparent perspective view of a long boring bar device for a machine tool according to the present invention is shown.

[0058] The following definitions apply to the terms used: "Inner (middle)" refers to the side of a component that is relatively close to the center. Figures 3 to 10 The inner side of the space in the middle, "outer (outer)" refers to the side of the same component that is relatively far from the center, that is Figures 3 to 10 The outer side of the space within the component. "Front" refers to the direction closer to the workpiece on the same component, while "rear" refers to the direction farther from the workpiece on the same component. "One side (one end)" refers to one end of the same component along its length, and "the other side (the other end)" refers to the portion of the same component opposite to "one side (one end)," that is, the other end portion along the length of the same component. In other words, "one side (one end)" refers to... Figures 3 to 10 The left direction in the middle, "the other end (the other end)" refers to Figures 3 to 8 To the right of the middle.

[0059] refer to Figures 3 to 10 This describes the long boring bar device for a machine tool according to the present invention. For example... Figures 3 to 10 As shown, the long boring bar device of the machine tool according to the present invention includes a turret 10 and a boring bar unit 20. The boring bar unit 20 includes a retainer 100, a boring bar 200 and a head tool 300.

[0060] Additionally, the machine tool 1 equipped with the long boring bar device according to the present invention includes: a turret 10, a boring bar unit 20, a tool post 30, a spindle 40, and a tool magazine 50.

[0061] The turret 10 houses multiple cutting tools, including the boring bar unit 20. That is, the turret 10 can accommodate various cutting tools required for the machining operations of the machine tool 1. Figure 3 As shown, the turret 10 can accommodate various tools, including not only tools for external and internal turning, but also tools required for drilling or milling operations.

[0062] like Figure 3 As shown, the turret 10 is rotatably mounted on a portion of the tool post 30 via a drive unit. That is, the turret is indexably mounted on the tool post. Additionally, although not shown, the tool post 30 is mounted on a portion of the machine tool body or bed.

[0063] Although not in Figure 3 As shown, the drive unit of the turret is mounted on the tool holder 30 and provides rotational power to the turret 10. The drive unit selectively provides rotational power to the turret 10, so that the workpiece is machined with the desired tool from among a plurality of tools housed in the turret by rotating the turret 10. However, it is not limited to this; the drive unit may be formed by a servo motor. Furthermore, the drive unit operates according to instructions from a PLC or CNC unit.

[0064] In addition, the numerical control unit, including NC (numerical control) or CNC (computerized numerical control), stores various numerical control programs internally. That is, the numerical control unit internally stores the driver programs for the drive units, i.e., servo motors, the tool running programs, etc., and these programs are automatically loaded and started when the numerical control unit is driven. Furthermore, the numerical control unit communicates with the main control unit and the PLC through a predetermined protocol.

[0065] The main operation unit includes a screen display program and a data input program based on the screen display selection. By outputting the screen display program, a software switch is displayed on the screen, and the on / off state of the software switch is identified, thereby executing the function of issuing input / output commands for machine tool actions.

[0066] In addition, the main control unit is equipped with a display, which is set on the machine tool’s housing, casing, or side, and can display various function switches or buttons and various information, but is not limited to this.

[0067] A PLC (Programmable Logic Controller) communicates with the numerical control unit or main operating unit through a predetermined protocol to execute control commands. In other words, the PLC receives control commands from the numerical control program of the numerical control unit or main operating unit and performs actions accordingly.

[0068] The retainer 100 of the boring bar unit 20 is detachably coupled to the turret 10. That is, the retainer is detachably connected to one side of the turret to support the boring bar. However, it is not limited to this; the retainer 100 can be detachably attached to the turret 10 by bolts, rivets, or the like.

[0069] The boring bar 200 is coupled so that it can be clamped or released by the retainer 100. That is, a head tool is detachably mounted at one end of the boring bar to machine the inner or outer diameter of the workpiece, and the other end of the boring bar is supported by the retainer and detachably mounted on the turret. However, it is not limited to this, the boring bar can be formed from a hollow cylindrical member with a predetermined length and diameter.

[0070] The head tool 300 is coupled so that it can be clamped or released by the boring bar 300.

[0071] That is, because the head tool is detachably mounted at one end of the boring bar, and the other end of the boring bar is detachably mounted on the retainer and supported by the turret, the boring bar unit can smoothly perform operations such as expanding the inner diameter of the workpiece or improving the surface accuracy of the inner diameter of the workpiece. For example, in a turning center, the boring bar unit 20 can be used to machine the inner or outer diameter of medium or large hollow pipes used for gas pipelines or oil pipelines.

[0072] The boring bar unit 20 of the long boring bar device of the machine tool according to the present invention is mounted on the turret 10. Specifically, as shown... Figure 3 As shown, the boring bar unit 20 can be stored in the tool magazine 50, which is located adjacent to the spindle 40, and then installed on the turret 10 by an automatic tool changer according to the instructions of the CNC unit.

[0073] That is, such as Figure 3 As shown, machine tool 1 includes a spindle 40 mounted on a bed or floor (not shown), and a chuck 2 connected to the spindle 40, rotating with the spindle as it rotates. Multiple jaws are formed in the chuck to support a workpiece 3. Although not shown, the spindle rotates via a drive device such as a servo motor, and the rotation of the spindle causes the chuck and the workpiece held by the chuck to rotate as well.

[0074] The tool magazine 5 is disposed adjacent to the spindle. More specifically, the tool magazine is installed outside the machining area to protect the stored tools from foreign matter such as chips and cutting oil that fly out during workpiece machining. Furthermore, this tool magazine can be installed as part of the spindle or outside the machine tool, allowing it to be moved by other drive devices such as ball screws, linear guides, or servo motors.

[0075] like Figure 3 As shown, the tool holder 30 is movably mounted on the bed (not shown) via a drive mechanism. Therefore, in order to machine the workpiece, the optimal travel distance is achieved by using multiple tools mounted on the turret to machine the workpiece.

[0076] Thus, the boring bar unit 20 can be stored in the tool magazine 50 with the retainer 100, boring bar 200, and head tool 300 all clamped together, and then installed on the turret 10 by the automatic tool changer according to the instructions of the CNC unit. Alternatively, if needed, the boring bar unit 20 can be stored in the tool magazine 50 with only the retainer 100 always installed on the turret 10 and the boring bar 200 and head tool 300 all engaged, and then clamped onto the retainer installed on the turret 10 by the automatic tool changer according to the instructions of the CNC unit.

[0077] Preferably, when it is necessary to replace the head tool 300, other head tools 300 stored in the tool magazine 50 can be automatically clamped or released by the second clamping part 220 to the retainer 100 mounted on the turret 10, and by the first clamping part 120 to the boring bar 200 clamped to the retainer, so that the replacement can be easily performed by the automatic tool changer.

[0078] As a result, in the long boring bar device of the machine tool according to the present invention, the retainer 100 is detachably connected to the turret 10, and not only are the retainer 100 and the boring bar 200 detachably connected, but the head tool is also detachably connected to the boring bar 200. Thus, when it is necessary to replace the head tool 300, the head tool 300 can be replaced simply and easily. Moreover, with the reduction of non-working time, productivity can be improved and the convenience of the workers can be greatly improved.

[0079] like Figures 4 to 10 As shown, the holder 100 of the long boring bar device of the machine tool according to the present invention includes a housing portion 110, a first clamping portion 120, an inflow portion 130 and an outflow portion 140.

[0080] The outer casing 110 forms the shape of the retainer 100 and provides space for forming the first clamping portion 120, the inflow portion 130, and the outflow portion 140. Additionally, a first receiving groove 111 is formed on one side of the outer casing 110 for inserting the other side of the boring bar. That is, the outer casing 110 has a recessed first receiving groove on one side for inserting the shank portion of the boring bar to support the boring bar when the shank portion 240 of the boring bar is clamped or released by the first clamping portion. However, it is not limited to this; the first receiving groove 111 is formed in a shape corresponding to the shank portion 240, thereby accommodating the shank portion and supporting the boring bar when it is clamped by the retainer.

[0081] The first clamping part 120 is formed inside the outer casing 110 adjacent to the first receiving groove 111 to clamp or release the boring bar 200. That is, the first clamping part 120 is disposed inside one side of the outer casing adjacent to the first receiving groove, and the boring bar is clamped or released from the retainer manually by operating the rotating part (described later) or automatically by hydraulic means (figures omitted). Specifically, the first clamping part can clamp or release the boring bar relative to the retainer manually or automatically by a manually operated bolt cam structure or an automatically operated hydraulic cylinder.

[0082] Therefore, the long boring bar device of the machine tool according to the present invention can increase the convenience of the operator, and when the long boring bar device is not in use, by preventing collisions caused by interference between the boring bar and other devices, it can reduce the waste of resources caused by equipment damage, save equipment maintenance time and costs, and improve machining accuracy.

[0083] An inlet portion 130 is formed on the other side of the housing portion 110 to supply hydraulic, pneumatic and cutting oil to the interior of the housing portion.

[0084] An outlet 140 is formed on one side of the outer casing 110, communicating with an inlet 130, to discharge hydraulic pressure, air pressure, and cutting oil flowing into the interior of the outer casing to the exterior of the outer casing. That is, the hydraulic pressure, air pressure, and cutting oil discharged through the outlet are transmitted to the first, second, third, fourth, and fifth flow paths formed through the main body of the boring bar (described later).

[0085] Furthermore, specifically, the inflow section 130 and the outflow section 140 are interconnected by multiple flow paths formed through the interior of the outer casing. Specifically, the interior of the outer casing has multiple flow paths, each formed individually and penetrating the interior of the outer casing. One end of each flow path is connected to the outflow section, and the other end is connected to the inflow section. Furthermore, each flow path can be supplied with different hydraulic pressure, pneumatic pressure, and cutting oil through multiple holes in the inflow and outflow sections. Additionally, assembly sections and couplings are formed in the inflow and outflow sections to prevent leakage of hydraulic pressure, pneumatic pressure, and cutting oil, ensuring stable connection during clamping or loosening, thereby improving the stability and reliability of the machine tool and ensuring cleanliness.

[0086] Thus, the hydraulic pressure used for automatically operating the second clamping part for clamping or releasing the boring bar and head tool (described later), the air pressure used to check whether the clamping is normal, and the cutting oil supply line supplied when machining the workpiece with the machining part of the head tool are all formed inside the boring bar of the retainer. There are no bypass lines or areas where installation is impossible due to mechanical interference. Therefore, unnecessary lines can be minimized, the machine tool can be miniaturized, space utilization can be greatly improved, and manufacturing costs can be reduced.

[0087] like Figures 4 to 10 As shown, the boring bar 200 of the long boring bar device of the machine tool according to the present invention includes a main body 210, a second clamping part 220, a connecting part 230, and a tool holder part 240.

[0088] The main body 210 forms the shape of the boring bar 200 and provides space for forming the second clamping part 220, the connecting part 230, and the tool holder part 240. However, it is not limited to this; it is formed as a hollow cylinder penetrating the interior of the main body 210 and has a predetermined length and diameter. Furthermore, a second receiving groove 211 is formed on one side of the main body 210 for inserting the other side of the head tool. That is, the main body 110 has a second receiving groove recessed along its length on one side, which supports the head tool when the head tool's connecting part 320 (described later) is clamped or released by the second clamping part. However, it is not limited to this; the second receiving groove 211 is formed in a shape corresponding to the connecting part 320 to accommodate the connecting part and support the head tool when it is clamped to the boring bar.

[0089] The second clamping part 220 is formed inside the main body 210 adjacent to the second receiving groove 211 to clamp or release the head tool 300. That is, the second clamping part 220 is disposed inside one side of the main body adjacent to the second receiving groove, and the head tool is clamped onto or released from the boring bar automatically by hydraulic pressure supplied by the first and second flow paths (described later) or manually by means of a bolt block or the like (figures omitted). Specifically, the second clamping part can clamp the head tool onto or release it from the boring bar manually or automatically by means of a manually operated bolt cam structure or an automatically operated hydraulic cylinder structure, etc.

[0090] Therefore, according to the long boring bar device of the machine tool of the present invention, when it is necessary to change the head tool, the head tool is automatically changed by an automatic tool changer or the like, thereby minimizing non-working time, greatly improving the productivity of the machine tool, improving machining accuracy, and increasing the stability and reliability of the machine tool.

[0091] A connecting portion 230 is formed on the other side of the main body and communicates with the outlet portion 140 when the boring bar 200 is clamped by the retainer 100, so as to supply hydraulic pressure, air pressure, or cutting oil discharged from the outlet portion to the interior of the main body 210. That is, the connecting portion 230 communicates with the first, second, third, fourth, and fifth flow path portions described later, and when clamped by the retainer, it engages with the outlet portion through the assembly portion or coupling, thereby transmitting the hydraulic pressure, air pressure, or cutting oil discharged from the outlet portion to the first, second, third, fourth, and fifth flow path portions.

[0092] The shank portion 240 is formed on the other side of the main body portion 210 and engages with the first clamping portion when the boring bar 200 is clamped by the retainer 100. Specifically, the shank portion 240 is formed in a shape corresponding to the first receiving groove 111 so that it can be introduced into or drawn out of the first receiving groove 111, thereby engaging or disengaging with the first clamping portion through the action of the first clamping portion.

[0093] Furthermore, the handle portion 240 has a first mounting groove 241 recessed on the inner circumferential surface of the other side of the handle portion. That is, the first mounting groove 241 is recessed in the circumferential direction along the inner circumferential surface of the other side of the handle portion.

[0094] like Figures 4 to 10 As shown, the head tool 300 of the long boring bar device of the machine tool according to the present invention includes a machining section 310 and a connecting section 320.

[0095] The machining section 310 is used to machine the inner or outer diameter of a workpiece. A cutting head for machining the workpiece can be formed at the front end or one side of the machining section 310. Furthermore, the machining section 310 can be formed into various shapes depending on the type and size of the workpiece to be machined.

[0096] The engagement portion 320 is formed on the other side of the machining portion 310 and engages with the second clamping portion 220 when the head tool 300 is clamped to the boring bar 200. Specifically, the engagement portion 320 is formed in a shape corresponding to the second receiving groove 211 so that it can be introduced into or drawn out of the second receiving groove 211, thereby engaging or disengaging with the second clamping portion through the action of the second clamping portion.

[0097] Furthermore, the joint portion 320 has a second mounting groove 321 recessed on the inner circumferential surface of the other side of the joint portion. That is, the second mounting groove 321 is recessed in the circumferential direction along the inner circumferential surface of the other side of the joint portion.

[0098] like Figures 7 to 10 As shown, the first clamping part 120 of the holder 100 of the long boring bar device of the machine tool according to the present invention includes: a rotating part 121, a first cylinder 122, a first locking part 124 and a first elastic part 126.

[0099] The rotating part 121 is rotatably inserted into the outer casing 110. That is, the rotating part 121 is rotatably inserted into the outer casing in such a way that it is adjacent to the first receiving groove and intersects the length direction of the first receiving groove.

[0100] The first cylinder 122 is configured to move forward or backward relative to the tool holder depending on the rotation direction of the rotating part 121. For example, when the rotating part is rotated clockwise inside the housing 110, the first cylinder moves forward toward the tool holder to clamp the boring bar; conversely, when the rotating part is rotated counterclockwise, the first cylinder moves backward toward the tool holder to release the boring bar. Furthermore, the first cylinder 122 has a first inclined surface 123, which is tapered along a flange surface protruding from the front end of a side adjacent to the first receiving groove of the first cylinder.

[0101] The first locking part 124 is rotatably disposed along a first inclined surface formed on one side of the first cylinder.

[0102] A first elastic portion 126 is disposed between the first locking portion and the other end of the first cylinder portion to provide elastic force to the first cylinder when the first cylinder moves backward. Thus, by providing elasticity to the first cylinder by a restoring force when the first cylinder moves backward, the convenience of the operator can be improved, and the device can be miniaturized and compacted. However, it is not limited to this; the first elastic portion 126 may be formed of a compression spring.

[0103] refer to Figure 7 and Figure 8 Explain the clamping or releasing mechanism of the boring bar and the retainer.

[0104] As the first cylinder rotates through the rotating part, the boring bar and the clamp move forward relative to the tool holder. The first locking part formed at the front end of one side of the first locking part rotates along the first inclined surface and engages with the first mounting groove. Conversely, as the first cylinder rotates in the opposite direction through the rotating part, the boring bar and the retainer move backward relative to the tool holder. The first locking part formed at the front end of one side of the first locking part rotates along the first inclined surface, thereby disengaging from the first mounting groove and being released.

[0105] Specifically, during the clamping process of the boring bar and the holder, if the rotating part is rotated clockwise or counterclockwise by the operator or a control signal, the first cylinder moves forward toward the tool holder. As the first cylinder moves forward toward the tool holder (moving in the direction adjacent to the first receiving groove), the first locking part rotates and rises along the first inclined surface. Consequently, the first locking part engages with the first mounting groove, and the boring bar is clamped to the holder. Conversely, when releasing the boring bar and the holder, if the rotating part is rotated in the opposite direction to the clamping process by the operator or a control signal, the first cylinder moves backward relative to the tool holder (moving away from the first receiving groove). As the first cylinder moves backward relative to the tool holder, the first locking part rotates downward along the first inclined surface. Consequently, it releases from the first mounting groove and disengages from the first locking part, causing the boring bar to release from the holder.

[0106] Thus, in the long boring bar device of the machine tool according to the present invention, the boring bar can be detachably installed on the retainer by a simple rotation operation of the rotating part of the first clamping part, thereby increasing the convenience of the operator. Furthermore, when the boring bar is not in use, collisions caused by interference between the long boring bar and other equipment are prevented, thereby reducing maintenance time and costs caused by equipment damage, preventing resource waste, and reducing processing costs.

[0107] like Figure 10 As shown, the main body 210 of the boring bar 200 of the long boring bar device of the machine tool according to the present invention includes: a first flow path 212, a second flow path 213, a third flow path 214, a fourth flow path 215, and / or a fifth flow path 216.

[0108] The first flow path 212 is connected to the connecting part and is formed through the interior of the main body. That is, the first flow path is formed through the interior of the main body in such a way that one end of the first flow path is connected to the second clamping part and the other end is connected to the connecting part, thereby transmitting the hydraulic pressure flowing into the connecting part to the second clamping part, providing power to move the second cylinder (described later) forward.

[0109] The second flow path 213 is connected to the connecting part and is formed through the interior of the main body. That is, it is formed through the interior of the main body in such a way that one end of the first flow path is connected to the second clamping part and the other end is connected to the connecting part, thereby transmitting the hydraulic pressure flowing into the connecting part to the second clamping part, providing power to move the second cylinder (described later) backward.

[0110] Thus, in the long boring bar device of the machine tool according to the present invention, the head tool is automatically and detachably attached to the boring bar via a second clamping part, wherein the second clamping part is hydraulically operated by a first flow path and a second flow path formed inside the main body of the boring bar, thereby automatically changing the head tool via a tool changer based on a signal from the CNC unit when the head tool needs to be changed. This minimizes non-machining time, greatly improves the productivity of the machine tool, and increases machining accuracy.

[0111] The third flow path 214 is connected to the connecting part and is formed through the interior of the main body. Specifically, one end of the third flow path is connected to the second receiving groove, and the other end is connected to the connecting part, thus transmitting the air pressure flowing into the connecting part to the second receiving groove to confirm whether the head tool and boring bar are properly clamped. An air gap sensor or similar device is installed adjacent to one end of the third flow path. When automatically changing the head tool based on whether the air pressure supplied through the third flow path flows out, it confirms whether the head tool is properly clamped by the boring bar to prevent malfunctions, thereby greatly improving the reliability and safety of the machine tool.

[0112] The fourth flow path 215 is connected to the connecting part and is formed through the interior of the main body. Specifically, one end of the fourth flow path is connected to one side of the second clamping part and the second receiving groove, while the other end is connected through the interior of the main body. This allows the second clamping part and the second receiving groove to be cleaned when the head tool is changed using air pressure flowing into the connecting part. Thus, when the head tool is automatically changed by the automatic tool changer by moving the second clamping part forward or backward using hydraulic pressure supplied by the first and second flow paths via signals from the CNC unit, the second clamping part and the second receiving groove are cleaned by air pressure supplied by the fourth flow path. This removes foreign matter from the second clamping part and the second receiving groove, maintains a stable clamping state between the boring bar and the head tool, improves machining accuracy, prevents malfunctions, enhances the safety and reliability of the machine tool, and improves operator convenience.

[0113] The fifth flow path 216 is connected to the connecting part and is formed through the interior of the main body. Specifically, the fifth flow path is formed by connecting one end to the machining part and the other end to the connecting part, thus ensuring a rapid and smooth supply of cutting oil to the connecting part when machining a workpiece. Specifically, when the boring bar is clamped by the retainer, the cutting oil flowing into the retainer's outer housing through the inlet and outlet through the outlet is supplied to the tip of the head tool via the connecting part and the fifth flow path. This minimizes tool damage caused by frictional heat, increasing the head tool's life and improving machining accuracy. Furthermore, by eliminating unnecessary wiring, the long boring bar device can be minimized, thereby reducing overall machine tool manufacturing costs and time, and significantly improving space utilization.

[0114] like Figures 7 to 10 As shown, the second clamping part 120 of the boring bar 200 of the long boring bar device of the machine tool according to the present invention includes: a second cylinder 221, a second locking part 223 and a second elastic part 225.

[0115] The second cylinder 221 is configured to move forward or backward relative to the coupling portion via hydraulic pressure flowing in from the first or second flow path. Furthermore, the second cylinder 221 includes a first hydraulic pressure inflow groove and a second hydraulic pressure inflow groove. That is, for example, when the hydraulic pressure in the first hydraulic pressure inflow groove increases due to the hydraulic pressure flowing in from the first flow path 212, the second cylinder moves forward toward the coupling portion (moves in the direction adjacent to the second receiving groove) to clamp the head cutter; conversely, when the hydraulic pressure in the second hydraulic pressure inflow groove increases due to the hydraulic pressure flowing in from the second flow path 213, the second cylinder moves backward toward the coupling portion (moves away from the second receiving groove) to release the head cutter. Additionally, the second cylinder 221 has a second inclined surface 222, which is tapered along a flange surface protruding from the front end of a side adjacent to the second receiving groove of the second cylinder.

[0116] The second locking part 223 is rotatably disposed along a second inclined surface formed on one side of the second cylinder.

[0117] The second elastic portion 225 is disposed between the second locking portion and the other end of the second cylinder portion to provide elastic force to the second cylinder when the second cylinder moves backward. In this way, when the second cylinder moves backward, the second elastic portion provides elasticity through restoring force, thereby improving the convenience of the operator and the miniaturization and compactness of the device. However, it is not limited to this, the second elastic portion 225 may be formed by a compression spring.

[0118] refer to Figure 7 and Figures 9 to 10 Explain the clamping or releasing mechanism of the head tool and boring bar.

[0119] As the head tool and boring bar move forward (towards the direction adjacent to the second receiving groove) with the hydraulic pressure flowing in from the first flow path via the second cylinder, the second locking portion formed at the front end of one side of the second locking portion rotates along the second inclined surface and clamps into the second mounting groove. Conversely, as the head tool and boring bar move backward with the hydraulic pressure flowing in from the second flow path via the second cylinder, the second locking portion rotates along the second inclined surface and is released from the second mounting groove.

[0120] Specifically, when the head tool is clamped by the boring bar, hydraulic pressure is supplied from the hydraulic supply source through the inflow and outflow sections and the connecting section to the first hydraulic inflow groove via the control signal of the CNC unit. When the hydraulic pressure in the first hydraulic inflow groove increases, the second cylinder moves forward toward the connecting section. As the second cylinder moves forward toward the connecting section (moving in the direction adjacent to the second receiving groove), the second locking part rotates to rise along the second inclined surface. As a result, the second locking part engages with the second mounting groove, and the head tool is automatically clamped to the boring bar. Conversely, when the head tool is released from the boring bar, hydraulic pressure is supplied from the hydraulic supply source through the inlet and outlet sections and the connecting section to the second hydraulic inflow groove via the control signal of the CNC unit. As the hydraulic pressure in the second hydraulic inflow groove increases, the second cylinder moves backward toward the joint (moving away from the second receiving groove). As the second cylinder moves backward relative to the joint, the second locking part rotates to descend along the second inclined surface. As a result, the second locking part is released from the second mounting groove, and the head tool is released from the boring bar.

[0121] Thus, in the long boring bar device of the machine tool according to the present invention, the head tool is automatically and detachably attached to the boring bar via the second clamping part, wherein the second clamping part is actuated by hydraulic pressure supplied by the first flow path and the second flow path formed inside the boring bar. Therefore, when it is necessary to replace the head tool, the head tool is automatically replaced by an automatic tool changer or the like, thereby minimizing non-machining time, greatly improving the productivity of the machine tool, and increasing machining accuracy.

[0122] In the detailed description of the present invention described above, preferred embodiments of the invention have been referenced. However, it should be understood that various modifications and alterations can be made to the invention by those skilled in the art or those with ordinary knowledge in the art, without departing from the spirit and technical scope of the invention as described in the claims. Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description, but is determined by the scope of the claims.

[0123] Symbol Explanation

[0124] 1: Machine tool, 10: Turret, 20: Boring bar unit, 30: Tool post, 40: Spindle, 50: Tool magazine, 100: Holder, 110: Housing, 120: First clamping part, 130: Inlet part, 140: Outlet part, 200: Boring bar, 210: Main body part, 220: Second clamping part, 230: Connecting part, 240: Tool holder part, 300: Head tool, 310: Machining part, 320: Connecting part.

Claims

1. A long boring bar device for a machine tool, characterized in that, include: A turret is used to hold multiple cutting tools; as well as The boring bar unit is mounted on the turret. The boring bar unit comprises: A retainer is detachably coupled to the turret; The boring bar is clamped or loosely coupled to the retainer; as well as The head cutter is clamped or loosely coupled to the boring bar. The retainer includes: The outer casing has a first receiving groove on one side; A first clamping portion is formed inside the outer casing adjacent to the first receiving groove for clamping or releasing the boring bar; An inflow section, formed on the other side of the outer casing, supplies hydraulic and pneumatic pressure to the interior of the outer casing; and An outlet portion, formed on one side of the outer casing portion in communication with the inflow portion, is used to discharge hydraulic and pneumatic pressure flowing into the interior of the outer casing portion to the exterior of the outer casing portion. The boring bar includes: The main body has a second receiving groove on one side; A second clamping portion is formed inside the main body adjacent to the second receiving groove for clamping or releasing the head cutter; A connecting portion, formed on the other side of the main body, communicates with the outlet portion when the boring bar is clamped by the retainer, so as to supply hydraulic and pneumatic pressure discharged from the outlet portion to the interior of the main body; and The tool holder portion, formed on the other side of the main body portion, engages with the first clamping portion when the boring bar is clamped by the retainer. The first clamping part includes: A rotating part is rotatably inserted into the outer casing. The first cylinder moves forward or backward relative to the tool holder in accordance with the rotation direction of the rotating part; and The first locking part is configured to rotate along a first inclined surface formed on one side of the first cylinder.

2. The long boring bar device for a machine tool according to claim 1, characterized in that, The head-mounted cutting tool includes: Machining section, used for machining the inner or outer diameter of workpieces; and A connecting portion is formed on the other side of the machining portion, which engages with the second clamping portion when the head tool is clamped by the boring bar.

3. The long boring bar device for a machine tool according to claim 1, characterized in that, The handle portion has a first mounting groove recessed into the inner circumferential surface on the other side of the handle portion; The boring bar and the retainer move forward relative to the tool holder as the first cylinder rotates through the rotating part, thereby engaging the first locking part formed on one front end of the first locking part with the first mounting groove and being clamped as it rotates along the first inclined surface.

4. The long boring bar device for a machine tool according to claim 2, characterized in that, The main body includes: A first flow path portion is formed, which communicates with the connecting portion and extends through the interior of the main body portion; and The second flow path is connected to the connecting part and is formed by penetrating the interior of the main body.

5. The long boring bar device for a machine tool according to claim 4, characterized in that, The second clamping part includes: The second cylinder moves forward or backward relative to the joint by hydraulic pressure flowing in from the first or second flow path; and The second locking part is configured to rotate along a second inclined surface formed on one side of the second cylinder.

6. The long boring bar device for a machine tool according to claim 5, characterized in that, The joint includes a second mounting groove, which is recessed into the inner circumferential surface of the other side of the joint.

7. The long boring bar device for a machine tool according to claim 6, characterized in that, The head cutter and the boring bar move forward with the second cylinder via hydraulic pressure flowing in from the first flow path, thereby causing the second locking portion formed on one front end of the second locking portion to rotate along the second inclined surface and engage with the second mounting groove to be clamped. The head cutter and the boring bar move backward with the second cylinder through the hydraulic pressure flowing in from the second flow path, thereby releasing the second locking part from the second mounting slot as it rotates along the second inclined surface.

8. The long boring bar device for a machine tool according to claim 4, characterized in that, The main body has a third flow path section, which supplies air pressure to confirm whether the head tool and the boring bar are properly clamped. The third flow path section is connected to the connecting part and is formed through the interior of the main body.

9. The long boring bar device for a machine tool according to claim 4, characterized in that, The main body has a fourth flow path, which is connected to the connecting part and is formed through the interior of the main body in order to supply air pressure for cleaning the second clamping part and the second receiving groove when changing the head cutter.

10. The long boring bar device for a machine tool according to claim 1, characterized in that, The main body has a fifth flow path, which is connected to the connecting part and is formed through the interior of the main body to supply cutting oil, which is supplied to the interior of the outer shell through the inflow part and discharged to the exterior of the outer shell through the outflow part, to the head tool.

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