KR20230137174A - Tool cooling system of Machine tool - Google Patents

Abstract

The present invention relates to a tool cooling device for a machine tool including a tool rest body and a turret installed on the tool rest body and on which a plurality of tools are mounted, comprising: a base portion fixed to the tool rest body; an indexing unit rotatably installed on the base to index the turret; A clamping part installed on the base to be capable of linear reciprocating movement; and a cooling passage part formed in the clamping part and the indexing part to transfer cooling fluid for cooling the tool, wherein the clamping part is selectively clamped or unclamped with the indexing part so that the cooling fluid leaks. This relates to a tool cooling device for machine tools that has the feature of preventing damage.

Description

Tool cooling system of machine tool {Tool cooling system of Machine tool}

The present invention relates to a tool cooling device for a machine tool, and more specifically, to a tool cooling device for a machine tool in which a clamping portion is selectively coupled with an indexing portion to prevent cooling fluid from leaking.

In general, machine tools refer to machines used to process metal/non-metal workpieces into desired shapes and dimensions using appropriate tools using various cutting or non-cutting processing methods.

Various types of machine tools, including turning centers, vertical/horizontal machining centers, door-type machining centers, Swiss turns, electric discharge machines, horizontal NC boring machines, CNC lathes, and complex processing machines, are widely available in various industrial sites to suit the purpose of the work. It is being used.

Among machine tools, a complex machining machine refers to a turning center equipped with a multi-functional automatic tool changer (ATC) and tool magazine that performs various machining types such as turning, drilling, tapping, and milling. When an operator loads or exchanges tools required for processing in a multi-processing machine, he or she manually installs the tools into the tool magazine.

In general, various types of machine tools currently in use are equipped with an operating panel to which numerical control (NC) or computerized numerical control (CNC) technology is applied. This operating panel is equipped with various function switches or buttons and a monitor.

In addition, a machine tool includes a table on which the workpiece material is seated and transported for processing the workpiece, a pallet to prepare the workpiece before processing, a spindle on which the tool or workpiece is combined and rotated, a tailstock to support the workpiece, etc. during processing, and an anti-vibration tool. Equipped with etc.

In general, in machine tools, tables, tool rests, spindles, tailstocks, vibration stoppers, etc. are equipped with transfer units that transfer along a transfer axis to perform various machining.

Additionally, machine tools generally use multiple tools for various processing, and a tool magazine or turret is used as a tool storage location to store and store multiple tools.

These machine tools use multiple tools for various processing, and a tool magazine is used as a tool storage location to store multiple tools.

In addition, machine tools are generally equipped with an automatic tool changer (ATC) for withdrawing or storing a specific tool from a tool magazine according to a command from a numerical control unit in order to improve the productivity of the machine tool.

Additionally, machine tools are generally equipped with an automatic pallet changer (APC) to minimize non-processing time. The automatic pallet changer (APC) automatically exchanges pallets between the workpiece machining area and the workpiece installation area. A workpiece can be mounted on a pallet.

Additionally, machine tools are generally classified into turning centers and machining centers depending on the processing method. Generally, in turning centers, the workpiece rotates, and in machining centers, the workpiece is processed while the tool rotates.

A turning center, also commonly referred to as a lathe, is a device that processes a workpiece by rapidly rotating the workpiece mounted on a spindle and then approaching the tool.

Among these, the turning center is equipped with a number of tools and is equipped with a turret tool rest device that indexes the tools needed during the machining process.

In other words, the tool exchange operation in which a turning center moves one processing tool that was working in the machining position to the standby position and simultaneously brings one of the standby tools in the standby position to the machining position is called indexing.

As such, in machine tools, especially turning centers, indexing is required at least once for tool exchange during processing.

In addition, difficult-to-cut materials such as Inconel or titanium that require cryogenic processing have low thermal conductivity, so chips and tools are responsible for most of the heat recovery generated during processing. Accordingly, as the tool heats up during processing, its lifespan becomes very short, so cooling during processing is necessary to increase its lifespan.

Additionally, it is necessary to pre-cool the standby tool in order to maximize productivity by reducing the waiting time for machining.

In this way, the turret tool cooling device installed in the turning center cools the tool by supplying cryogenic cooling fluid such as liquid nitrogen or liquid carbon dioxide for cooling and pre-cooling of the tool processing difficult-to-cut materials.

However, the conventional turret tool cooling device moves one machining tool from the machining position to the standby position and simultaneously performs an indexing operation (rotation) to bring one of the standby tools in the standby position to the machining position. Since the fixed clamping part and the rotating indexing part are coupled to each other even during the cooling process, there was a problem in that the sealing part disposed between the clamping part and the indexing part to prevent leakage of cooling fluid was damaged by repeated rotation of the indexing part.

In addition, in the conventional turret tool cooling device, the sealing part disposed between the clamping part and the indexing part is damaged to prevent leakage of cooling fluid, so it costs money and time to replace the damaged sealing part, and the cooling fluid leaking through the damaged sealing part is used in the work. There was a problem that the durability of the machine tool was reduced due to damage to the machine, and the quality of the machined workpiece was deteriorated due to cryogenic machining being performed without a sufficient amount of cooling fluid being supplied to the tool due to loss of leaked cooling fluid.

Republic of Korea Patent Publication No. 10-2014-0056160

The present invention is intended to solve the above problems. The present invention is that while the turret is not indexing, the clamping part is clamped with the indexing part and comes into close contact with the sealing part, and while the turret is indexing, the clamping part is unclamped with the indexing part so that the clamping part is It relates to a tool cooling device for a machine tool that prevents damage to the sealing part by rotating the indexing part while spaced apart from the sealing part and prevents leakage of cooling fluid.

In order to achieve the purpose of the present invention, a tool cooling device for a machine tool according to the present invention includes a tool rest body and a turret installed on the tool rest body and on which a plurality of tools are mounted. A base portion fixed to the tool rest body; an indexing unit rotatably installed on the base to index the turret; A clamping part installed on the base to enable linear reciprocating movement; And a cooling passage part formed in the clamping part and the indexing part to transfer cooling fluid for cooling the tool, wherein the clamping part is selectively clamped with the indexing part to prevent the cooling fluid from leaking. can do.

In addition, in another preferred embodiment of the tool cooling device for a machine tool according to the present invention, it may include a sealing part disposed between the indexing part and the clamping part.

In addition, in another preferred embodiment of the tool cooling device for a machine tool according to the present invention, while the turret is not indexing, the clamping portion is clamped with the indexing portion to bring the sealing portion into close contact with the clamping portion and the indexing portion, While the turret is indexing, the clamping part may be unclamped from the indexing part so that the clamping part may be spaced apart from the sealing part.

In addition, in another preferred embodiment of the tool cooling device for a machine tool according to the present invention, it further includes an operating unit that linearly reciprocates the clamping unit, wherein the operating unit includes: a flow path portion formed in the base portion; and a chamber portion formed between the base portion and the clamping portion to selectively communicate with the flow path portion.

Additionally, in another preferred embodiment of the tool cooling device for a machine tool according to the present invention, the flow path portion includes: a first flow path portion through which fluid flows in or out; and a second flow path portion formed to be vertically spaced apart from the first flow path portion.

Additionally, in another preferred embodiment of the tool cooling device for a machine tool according to the present invention, the chamber portion includes: a first chamber portion selectively communicating with the first flow path portion; and a second chamber portion formed to be vertically spaced apart from the first chamber portion and selectively communicating with the second flow path portion.

Additionally, in another preferred embodiment of the tool cooling device for a machine tool according to the present invention, the cooling passage portion includes a supply passage formed in the clamping portion; And a transmission passage formed in the indexing portion. The delivery passage may be selectively communicated with the supply passage according to the indexing angle of the indexed turret.

In addition, in another preferred embodiment of the tool cooling device for a machine tool according to the present invention, while the turret is not indexing, the clamping portion descends through the fluid flowing into the first chamber portion from the first passage portion. The supply passage and the transmission passage are in communication, so that the processing tool for processing the workpiece can be cooled and the standby tool can be pre-cooled with the cooling fluid delivered through the supply passage.

In addition, in another preferred embodiment of the tool cooling device for a machine tool according to the present invention, while the turret is indexing, the supply is supplied as the clamping part rises through the fluid flowing into the second chamber part from the second flow path part. The indexing unit may rotate while the flow path and the transmission flow path are spaced apart.

In addition, in another preferred embodiment of the tool cooling device for a machine tool according to the present invention, it may further include a detection unit that detects whether the clamping unit is clamped with the indexing unit.

In addition, in another preferred embodiment of the tool cooling device for a machine tool according to the present invention, the supply passage includes a machining supply passage formed through a portion of the clamping portion and receiving a cooling fluid for cooling the machining tool; and a preliminary supply passage formed through a portion of the clamping portion to be spaced apart from the machining supply passage at a predetermined angle around an indexing axis in order to pre-cool the spare tool.

In addition, in another preferred embodiment of the tool cooling device for a machine tool according to the present invention, each of the plurality of transmission passages has one side selectively communicating with the machining supply passage or the preliminary supply passage according to the indexing angle of the turret. A communication part extending as far as possible through the indexing part; and an extension part bent at the other side of the communication part and extending adjacent to the tool mounted on the turret so as to be perpendicular to the indexing axis in order to cool the processing tool or pre-cool the standby tool.

In the tool cooling device for a machine tool according to the present invention, the fixed clamping part is not coupled to the rotating indexing part even during indexing (rotation) of the turret as in the prior art, but the clamping part is unclamped with the indexing part so that the clamping part is connected to the sealing part. It prevents the sealing part from being damaged by rotating the indexing part when it is spaced apart from the machine, and reduces the time and cost to replace the damaged sealing part, thereby improving the durability of the machine tool and minimizing the maintenance costs of the machine tool.

In addition, the tool cooling device for a machine tool according to the present invention supplies cooling fluid to the tool in a state where the clamping part is clamped to the indexing part and the sealing part disposed between the clamping part and the indexing part is in close contact while the turret is not indexing, thereby sealing the tool. By sealing the gap between the clamping part and the indexing part more completely than before and allowing the cooling fluid to flow, it prevents the cooling fluid from leaking through the gap between the clamping part and the indexing part, and ensures that a sufficient amount of cooling fluid is supplied. There is an effect of improving the quality of the machined workpiece by performing cryogenic processing while it is being supplied to the processing tool.

Moreover, the tool cooling device for a machine tool according to the present invention implements the clamping or unclamping operation of the clamping part and the unclamping part accurately and firmly through the flow path part and the chamber part, and the operation part that moves the clamping part in a straight line reciprocates, so that the indexing operation of the turret is determined. Accordingly, the clamping part is selectively clamped in close contact with the indexing part, or the clamping part is unclamped so that the indexing part is spaced apart, thereby preventing damage to the sealing part, preventing malfunction of the machine tool, and improving the reliability and stability of the machine tool.

Figure 1 shows a perspective view from above of a tool cooling device for a machine tool according to the present invention.
Figure 2 shows a top view of a tool cooling device for a machine tool according to the present invention.
FIG. 3 shows a cross-sectional view taken along line BB shown in FIG. 2.
Figure 4 shows a cross-sectional view taken along line AA shown in Figure 2 in a state in which the clamping part is clamped with the indexing part.
Figure 5 shows a detailed view of the clamping part clamped with the indexing part.
Figure 6 shows a cross-sectional view taken along line AA shown in Figure 2 in a state in which the clamping part is unclamped with the indexing part.
Figure 7 shows a detailed view of the clamping part and the indexing part in an unclamped state.
Figure 8 is a diagram showing a perspective view of the clamping part and the indexing part, respectively.

Hereinafter, a tool cooling device for a machine tool according to an embodiment of the present invention will be described in detail with reference to drawings. The embodiments introduced below are provided as examples so that the idea of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. Also, in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numerals refer to like elements throughout the specification.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. These embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is provided. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of explanation.

The terminology used herein is for describing embodiments and is therefore not intended to limit the invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprise” and/or “comprising” refers to the presence of one or more other components, steps, operations and/or elements. or does not rule out addition.

Figure 1 shows a perspective view from above of a tool cooling device for a machine tool according to the present invention. Figure 2 shows a top view of a tool cooling device for a machine tool according to the present invention.

Figure 3 shows a cross-sectional view taken along line B-B shown in Figure 2. Figure 4 shows a cross-sectional view taken along line A-A shown in Figure 2 in a state in which the clamping part is clamped with the indexing part.

Figure 5 shows a detailed view of the clamping part and the indexing part in a clamped state. Figure 6 shows a cross-sectional view taken along line A-A shown in Figure 2 in a state in which the clamping part is unclamped with the indexing part.

Figure 7 shows a detailed view of the clamping part and the indexing part in an unclamped state. Figure 8 is a diagram showing a perspective view of the clamping part and the indexing part, respectively.

The tool cooling device 1 for a machine tool according to the present invention will be described with reference to FIGS. 1 to 8. As shown in Figures 1 to 8, the tool cooling device 1 for a machine tool according to the present invention includes a tool rest body 100, a turret 200, a base part 300, an indexing part 400, and a clamping part. It includes (500), a cooling passage part (600), a sealing part (700), an operating part (800), and a sensing part (900).

The tool post body 100 of the tool cooling device 1 for a machine tool according to the present invention is installed on a bed or a part of the body of the machine tool not shown in the drawing.

The turret 200 of the tool cooling device 1 of the machine tool according to the present invention is installed on the tool rest body 100, and a plurality of tools 3 and 4 are mounted thereon.

The turret 200 can store a variety of tools, such as cutting tools needed for machining workpieces, tools used for external turning and internal turning, as well as tools needed for drilling or milling work.

Specifically, the turret 200 is divided into angles around the indexing axis C and radially accommodates a plurality of tools.

In Figure 1, the turret is shown as being divided into 12 angles at an angle of 30 degrees, but it is not necessarily limited to this and may be divided into desired angles as needed.

That is, the turret of the tool cooling device for the machine tool according to the present invention is divided into 36 angles at a 10-degree angle, 24 angles at a 15-degree angle, or 9 angles at a 40-degree angle, or , it can be angle-divided into 6 angles at a 60-degree angle, angularly divided into 5 angles at a 90-degree angle, angularly divided into 3 angles at a 120-degree angle, or angularly divided into 2 angles at a 180-degree angle.

The base portion 300 of the tool cooling device 1 of the machine tool according to the present invention is fixedly installed on the tool rest body 100.

That is, the base portion 300 is fixed without rotating even while the turret 200 is indexed. Additionally, as shown in FIGS. 3 to 7, the base portion may be composed of several blocks.

In addition, although not necessarily limited to this, the base portion 300 may be provided with a connection block 310 formed at the top, the connection block 310 is also fixed, and the detection unit 900 is connected as will be described later. It may be placed in block 310.

The indexing unit 400 of the tool cooling device 1 of the machine tool according to the present invention is rotatably installed on the base unit 300 and serves to index the turret 200. That is, the indexing unit 400 is used to rotate the turret 200 and is installed across the turret and the tool rest body to index the plurality of tools 3 and 4 mounted on the turret 200.

Additionally, the indexing unit 400 is installed to extend through the turret 200 and rotates according to the driving of the driving unit 410.

The driving unit 410 is installed on the tool rest body 100 and provides rotational power to the indexing unit 400. That is, the drive unit 410 rotates the turret 200 and selectively provides rotational power to the turret 200 so that the workpiece can be processed with a desired tool among the plurality of tools 3 and 4 mounted on the turret.

Although not necessarily limited to this, the driving unit 410 may be formed as a servo motor. Additionally, the driving unit 410 operates by commands from the PLC or numerical control unit.

In addition, the numerical control unit includes numerical control (NC) or computerized numerical control (CNC) and has various numerical control programs built in.

That is, the numerical control unit is equipped with a driving program for the servomotor, a tool operation program, etc., and the corresponding program is automatically loaded and operated as the numerical control unit is driven. In addition, the numerical control unit communicates with the main operation unit and the PLC using a predetermined protocol.

In addition, the main operation unit includes a screen display program and a data input program according to screen display selection, displays a software switch on the display screen according to the output of the screen display program, and turns the software switch on/off. It performs the function of recognizing and issuing input/output commands for machine operation.

In addition, although not necessarily limited to this, the main operation unit is installed in the housing, case, or one side of the machine tool and includes various function switches or buttons and a monitor that can display various information.

PLC (Programmable Logic Controller) performs communication with the numerical control unit or main operation unit according to a predetermined protocol and performs the function of executing control commands through this communication. In other words, the PLC operates by receiving control commands according to the numerical control program of the numerical control unit or the main operation unit.

The clamping part 500 of the tool cooling device 1 of the machine tool according to the present invention is installed on the base part 300 to be capable of linear reciprocating movement.

Referring to Figures 4 to 7, the clamping part 500 is disposed on the upper part of the indexing part 400, and the clamping part reciprocates in a straight line (i.e., reciprocates up and down in the drawing) to selectively clamp the indexing part 400. or unclamped.

In addition, although not necessarily limited to this, the clamping part 500 may be provided with a block part 510 formed at the top, and the block part 510 also reciprocates in a straight line (i.e., reciprocates up and down in the drawing). , As will be described later, the detection unit 900 can detect the up and down movement of the block unit and detect whether the clamping unit is clamped or unclamped with the indexing unit.

The cooling passage portion 600 of the tool cooling device 1 of the machine tool according to the present invention is for cooling one or more tools mounted on the turret 200, and contains a cooling fluid for cooling the tools 2 and 3. It is formed in the clamping part 500 and the indexing part 400 to transmit.

Specifically, the cooling passage portion 600 includes a supply passage 610 formed in the clamping portion 500 and a transmission passage 620 formed in the indexing portion 400, and the transmission passage 620 is indexed. It is selectively communicated with the supply passage 610 according to the indexing angle of the turret 200.

Although not shown in the drawing. The cooling fluid supply source is installed outside the tool cooling device of the machine tool or inside or outside the cover of the machine tool and stores cryogenic cooling fluid to supply cryogenic cooling fluid to the tool through a cooling passage.

This cryogenic cooling fluid can be formed of liquid nitrogen or liquid carbon dioxide.

One side of the base passage 10 is connected to receive cooling fluid supplied from a cooling fluid supply source, and the other side is connected to the supply passage 610.

Specifically, the base flow path 10 includes a processed base flow path 11 and a preliminary base flow path 12.

The machining base passage 11 is for supplying cooling fluid for cooling the machining tool 3, and the spare base passage 12 is for supplying cooling fluid for pre-cooling the standby tool 4.

In other words, if only two base passages 10, the processing base passage 11 and the spare base passage 12, are installed, the cooling fluid can be supplied to a plurality of transmission passages.

In addition, the control unit 20 is installed on the base passage 10 to control the cooling fluid supplied from the cooling fluid supply source to be supplied or blocked to the supply passage 610.

Specifically, the control unit 20 includes a first control unit 21 and a second control unit 22, and the first control unit 21 is installed on the processing base flow path 11 to receive water from the cooling fluid supply source. The supplied cooling fluid can be supplied or blocked through the processing supply passage 611, which will be described later, and when the cooling fluid is supplied, the flow rate of the supplied cooling fluid can be adjusted as needed.

In addition, the second control unit 22 is installed on the spare base passage 12 to supply or block the cooling fluid supplied from the cooling fluid supply source to the spare supply passage 612, which will be described later, and the cooling fluid is supplied. If available, the flow rate of the supplied cooling fluid can be adjusted as needed.

And the first control unit 431 and the second control unit 432 may be formed as solenoid valves.

A solenoid valve is an electromagnetic valve. When electricity is applied, the flange rises and the valve opens. When electricity is cut off, the valve automatically closes due to the weight of the flange.

Referring to Figures 4 and 6, the supply passage 610 includes a processing supply passage 611 and a preliminary supply passage 612. Since the supply passage 610 is formed in the clamping portion 500 that does not rotate while the turret 200 is indexing, the supply passage 610 is also fixed and does not rotate while the turret is indexing.

The processing supply passage 611 is formed through a portion of the clamping portion 500 to receive cooling fluid for cooling the processing tool 3 currently being processed.

The spare supply passage 612 is provided with a machining supply passage 611 centered on the indexing axis (C-C) in a part of the clamping part 500 in order to pre-cool the spare tool to be used in the next machining after the machining of the machining tool is completed. It is formed through and spaced apart at a predetermined angle.

That is, the supply passage 610, like the base passage 10 described above, can supply cooling fluid to a plurality of delivery passages as will be described later if only two processing supply passages 611 and preliminary supply passages 612 are installed.

Referring to Figures 4 and 6, there may be a plurality of transmission passages 620, and the transmission passages 620 are formed in the indexing unit 400, which rotates while the turret 200 is indexing, as described above. The transmission passage 620 is also rotated while the turret 200 is indexing.

Each of the plurality of transmission passages 620 specifically includes a communication portion 621 and an extension portion 622.

The communicating portion 621 is formed to extend through the indexing portion 400 so that one side selectively communicates with the processing supply passage 611 or the preliminary supply passage 612 according to the indexing angle of the turret 200.

The extension part 622 is bent on the other side of the communication part 621 to cool the processing tool or pre-cool the standby tool and is attached to the tool (3.4) mounted on the turret 200 perpendicular to the indexing axis (C). are formed adjacent to each other.

Both the communication part 621 and the extension part 622 may be formed of an insulating tube.

One side is selectively in communication with the supply passage 610, that is, the processing supply passage 611 or the preliminary supply passage 612, according to the indexing angle of the turret, and the other side of the transmission passage is divided at an angle around the indexing axis (C). It is formed to extend through the rotating part 330 to be adjacent to one of the plurality of tools radially stored in the turret.

The sealing part 700 of the tool cooling device 1 of the machine tool according to the present invention is disposed between the indexing part 400 and the clamping part 500.

The sealing part 700 closes the gap between the indexing part 400 and the clamping part 500 in the process of cooling fluid flowing through the cooling passage part 600 formed in the indexing part 400 and the clamping part 500. This is to prevent cooling fluid from leaking through.

The sealing portion 700 is not necessarily limited to this, but may be made of an O-ring.

The clamping part 500 of the tool cooling device 1 of the machine tool according to the present invention can be selectively clamped or unclamped with the indexing part 400 to prevent cooling fluid from leaking.

Referring to Figures 4 and 5, specifically, while the turret 200 is not indexing, the clamping part 500 is clamped with the indexing part 400 to connect the sealing part 700 to the clamping part 500 and the indexing part 400. ) and adhere closely to it.

That is, while the turret 200 is not indexing, cooling fluid is supplied to the tool for cryogenic machining.

In this process, the clamping part 500 is clamped with the indexing part 400, so that the sealing part 700 is pressed from the top by the clamping part 500 and the indexing part 400 is pressed from the bottom to be in perfect contact with the sealing part 700 more than before. It is possible to prevent cooling fluid from leaking through the gap between the indexing unit 400 and the clamping unit 500.

In addition, referring to FIGS. 6 and 7, while the turret 200 is indexing, the clamping part 500 is unclamped from the indexing part 400, so that the clamping part 500 is spaced apart from the sealing part 700. maintain

That is, while the turret 200 is indexing, with no cooling fluid supplied, the clamping unit 500 does not rotate and only the indexing unit 400 rotates.

In this process, the clamping part 500 is unclamped with the indexing part 400, so that, unlike the prior art, the clamping part 500 is spaced apart from the sealing part 700, that is, the clamping part 500 and the indexing part do not rotate. By completely separating the sealing part 700 disposed at 400 and rotating together and then indexing, the sealing part 700 can be prevented from being damaged by the indexing operation.

In this way, in the tool cooling device for a machine tool according to the present invention, the fixed clamping part is not coupled to the rotating indexing part even during indexing (rotation) of the turret as in the prior art, but the clamping part is unclamped with the indexing part and the clamping part is sealed. It prevents the sealing part from being damaged by rotating the indexing part while separated from the part, and reduces the time and cost to replace the damaged sealing part, thereby improving the durability of the machine tool and minimizing the maintenance cost of the machine tool.

In addition, the tool cooling device for a machine tool according to the present invention supplies cooling fluid to the tool in a state where the clamping part is clamped to the indexing part and the sealing part disposed between the clamping part and the indexing part is in close contact while the turret is not indexing, thereby sealing the tool. By sealing the gap between the clamping part and the indexing part more completely than before and allowing the cooling fluid to flow, it prevents the cooling fluid from leaking through the gap between the clamping part and the indexing part, and ensures that a sufficient amount of cooling fluid is supplied. The quality of the processed workpiece can be improved by performing cryogenic processing while it is being supplied to the processing tool.

The operating unit 800 of the tool cooling device 1 of the machine tool according to the present invention serves to linearly move the clamping unit back and forth. Specifically, the operating unit 800 includes a flow path unit 810 and a chamber unit 820.

The flow path portion 810 is formed in the base portion 300 and serves as a passage through which fluid flows in or out. The incoming or outgoing fluid may be hydraulic and/or pneumatic. Specifically, the flow path portion 810 includes a first flow path portion 811 and a second flow path portion 812.

Referring to FIGS. 4 to 7 , the first passage portion 811 is a passage through which fluid flows in or out, and is formed through the upper portion of the base portion 300.

The second flow path portion 812 is formed to be vertically spaced apart from the first flow path portion 811, and, referring to FIGS. 4 to 7, is formed to penetrate the lower portion of the base portion 300.

The chamber portion 820 is formed between the base portion 300 and the clamping portion 500 to selectively communicate with the flow path portion 810. The chamber portion 820 is a portion that stores fluid flowing in through the flow path portion 810, and specifically includes a first chamber portion 821 and a second chamber portion 822.

The first chamber portion 821 is selectively in communication with the first flow path portion 811 and stores the fluid flowing in from the first flow path portion 811 or transfers the fluid stored in the first chamber portion 821 to the first flow path portion. It leaks out through (811).

The second chamber portion 822 is formed to be spaced apart from the first chamber portion 821 in the vertical direction and selectively communicates with the second flow path portion 812 to store fluid flowing in from the second flow path portion 812 or to store fluid flowing in from the second flow path portion 812. The fluid stored in the second chamber portion 822 flows out through the second flow path portion 812.

Referring to FIG. 5, the tool cooling device 1 of the machine tool according to the present invention uses fluid flowing from the first passage portion 811 to the first chamber portion 821 while the turret 200 is not indexing. As the clamping part 500 descends, the supply passage 610 and the delivery passage 620 are connected to cool the processing tool 3 for processing the workpiece with the cooling fluid delivered through the supply passage 610 and the standby tool ( 4) is pre-cooled.

That is, as described above, as the clamping unit 500 descends, cryogenic processing is performed in a clamped state with the indexing unit 400.

In addition, referring to FIG. 7, the tool cooling device 1 of the machine tool according to the present invention cools the clamping part through the fluid flowing from the second flow path part 812 to the second chamber part 822 while the turret is indexing. As 500 rises, the indexing unit 400 rotates while the supply passage 610 and the delivery passage 620 are spaced apart.

That is, as described above, as the clamping unit 500 rises, the turret performs an indexing operation in an unclamped state with the indexing unit 400.

In this way, the tool cooling device for a machine tool according to the present invention implements the clamping or unclamping operation of the clamping part and the unclamping part accurately and firmly through the flow path part and the chamber part, and the operation part that moves the clamping part in a straight line reciprocates, so as to determine whether the turret is indexed. Accordingly, the clamping part is selectively clamped in close contact with the indexing part, or the clamping part is unclamped so that the indexing part is spaced apart, thereby preventing damage to the sealing part, preventing malfunction of the machine tool, and improving the reliability and stability of the machine tool.

The detection unit 900 of the tool cooling device 1 of the machine tool according to the present invention serves to detect whether the clamping unit 500 is clamped with the indexing unit 400.

Although it is not specifically limited to this. The detection unit 900 may include a clamping detection unit 910 and an unclamping detection unit 920.

As described above, referring to FIGS. 4 to 7, the clamping unit 500 is disposed on the upper part of the indexing unit 400, and the clamping unit moves linearly (i.e., reciprocates up and down in the drawing) to selectively move the indexing unit ( 400) and clamped or unclamped.

In addition, although not necessarily limited to this, the clamping part 500 may be provided with a block part 510 formed at the top, and the block part 510 also moves in a straight line (i.e., moves up and down in the drawing). .

And as described above, the sensing unit 900 can be placed on the connection block 310 formed on the upper part of the base unit 300, where the turret 200 is fixed even if the clamping unit moves in a straight line.

That is, the clamping detection unit 910 detects the block unit 510 that is lowered when the clamping unit 500 is lowered to check whether it is clamped, and the unclamping detection unit 920 detects whether the clamping unit 500 is ascending. In this case, unclamping can be checked by detecting the block part 510 rising together.

In this way, the tool cooling device for a machine tool according to the present invention is equipped with a detection unit to check whether the clamping or unclamping operation of the clamping unit and the unclamping unit is performed accurately. If the detection unit detects clamping, cooling fluid is supplied to the tool. By performing cryogenic processing to prevent incorrect processing due to heat generation, processing precision is improved, and when the sensor detects unclamping, the turret indexing operation is implemented to prevent malfunction of machine tools and improve user convenience. You can do it.

Although the detailed description of the present invention described above has been described with reference to preferred embodiments of the present invention, those skilled in the art or those skilled in the art will understand the present invention as described in the patent claims to be described later. It will be understood that the present invention can be modified and changed in various ways without departing from the spirit and technical scope. Therefore, the technical scope of the present invention should not be limited to what is described in the detailed description of the specification, but should be defined by the scope of the patent claims.

100: tool post body,
200: Turret,
300: base part,
400: Indexing unit.
500: Clamping part.
600: Cooling passage part.
700: Sealing part.
800: Operating unit.
900: Sensing unit.

Claims (12)

In the tool cooling device for a machine tool including a tool rest body and a turret installed on the tool rest body and on which a plurality of tools are mounted,
A base portion fixed to the tool rest body;
an indexing unit rotatably installed on the base to index the turret;
A clamping part installed on the base to be capable of linear reciprocating movement; and
It includes a cooling passage part formed in the clamping part and the indexing part to transfer cooling fluid for cooling the tool,
A tool cooling device for a machine tool, wherein the clamping portion is selectively clamped with the indexing portion to prevent the cooling fluid from leaking.
According to paragraph 1,
A tool cooling device for a machine tool, comprising a sealing part disposed between the indexing part and the clamping part.
According to paragraph 2,
While the turret is not indexing, the clamping portion is clamped with the indexing portion to bring the sealing portion into close contact with the clamping portion and the indexing portion,
A tool cooling device for a machine tool, wherein while the turret is indexing, the clamping part is unclamped from the indexing part so that the clamping part is spaced apart from the sealing part.
According to paragraph 3,
It further includes an operating unit that moves the clamping unit in a linear reciprocating manner,
The operating unit,
A flow path portion formed in the base portion; and
A tool cooling device for a machine tool, comprising a chamber portion formed between the base portion and the clamping portion to selectively communicate with the flow path portion.
According to paragraph 4,
The euro section,
a first flow path through which fluid flows in or out; and
A tool cooling device for a machine tool, comprising: a second flow path portion formed to be vertically spaced apart from the first flow path portion. According to clause 5,
The chamber part,
a first chamber portion selectively communicating with the first flow path portion; and
A tool cooling device for a machine tool, comprising: a second chamber portion formed to be vertically spaced apart from the first chamber portion and selectively communicating with the second flow path portion.
According to clause 6,
The cooling passage part,
a supply passage formed in the clamping part; and
It includes; a transmission passage formed in the indexing portion.
A tool cooling device for a machine tool, characterized in that the delivery passage selectively communicates with the supply passage according to the indexing angle of the indexed turret.
In clause 7,
While the turret is not indexing, as the clamping unit descends through the fluid flowing into the first chamber from the first flow passage, the supply passage and the delivery passage are communicated, and the workpiece is cooled with the cooling fluid delivered through the supply passage. A tool cooling device for a machine tool, characterized in that it cools the processing tool and precools the standby tool.
In clause 7,
While the turret is indexing, the clamping part rises through the fluid flowing into the second chamber part from the second flow path, and the indexing part rotates while the supply flow path and the transmission flow path are spaced apart. Tool cooling system of the machine.
According to paragraph 2,
A tool cooling device for a machine tool, further comprising a detection unit that detects whether the clamping unit is clamped with the indexing unit.
In clause 7,
The supply flow path is,
a machining supply passage formed through a portion of the clamping portion to receive a cooling fluid for cooling the machining tool; and
A tool cooling device for a machine tool, comprising: a spare supply passage formed through a portion of the clamping portion to be spaced apart from the machining supply passage at a predetermined angle around an indexing axis in order to pre-cool the spare tool.
According to clause 11,
Each of the plurality of transmission channels is,
a communication portion extending through the indexing portion so that one side selectively communicates with the processing supply passage or the preliminary supply passage according to an indexing angle of the turret; and
An extension part bent on the other side of the communication part and extending adjacent to the tool mounted on the turret so as to be perpendicular to the indexing axis in order to cool the processing tool or pre-cool the standby tool. Tool cooling system of the machine.

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