KR101922052B1 - Device for working lathe - Google Patents

Abstract

A lathe machining apparatus capable of preventing thermal deformation of a cylinder workpiece is disclosed.
This lathe processing apparatus is provided with a bed provided with a chuck for rotating a cylinder workpiece, a cutting tool mounted movably in the longitudinal direction of the bed to process the cylinder workpiece, A position measuring device for measuring the position of the cutting tool on the bed, a cutting oil supply unit provided on the other side of the bed for spraying the cutting oil onto the cylinder workpiece, and a coolant supply device for spraying coolant on the machining area of the cylinder workpiece, And a controller for controlling the coolant supply unit by receiving a position signal of the cutting tool from the position measuring unit.

Description

{DEVICE FOR WORKING LATHE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a lathe machining apparatus capable of preventing thermal deformation of a cylinder workpiece, and more particularly, to a lathe machining apparatus capable of preventing the temperature of a cylinder workpiece from being heated to a predetermined temperature or higher by continuously supplying cutting oil to a cylinder workpiece To a lathe processing apparatus.

In general, a lathe machining apparatus is a device for turning a workpiece or a workpiece on a chuck and performing a turning operation while transferring a bite, and includes a grasp of a workpiece, multi-step cutting in a predetermined shape using a plurality of cutting tools, Automatic lathes are known in which the emissions of the workpiece are fully automated.

In the modern machining industry, there are various kinds of automatic lathe for lathe processing machine, but the main spindle type automatic lathe such as NC lathe, CNC lathe, and machining center mainly includes head stock and tool post, Is automatically controlled by a numerical control system to perform a rotary cutting operation.

The machining operations that can be performed in the lathe machining apparatus include outer diameter cutting, inner diameter cutting, taper cutting, mop cutting, section cutting, cutting operation, relieving, formed cuttint, forming, threading, . After the workpiece is fixed to the chuck provided on the shelf, the chuck is rotated to cut the inner and outer diameters of the workpiece through the bite.

Particularly, in the case of machining a hydraulic cylinder through a lathe machining apparatus, the rod of the hydraulic cylinder has a structure in which the tip of the rod protrudes to the outside even when the rod is introduced into the cylinder as much as possible. Since the rod has both the function of the cylinder and the function of the rod, the inner diameter and the outer diameter of the cylinder must be precisely machined to prevent the loss of the working fluid.

In order to process the inner and outer diameters of the pipe type cylinder, it is preferable to proceed the cutting process while preventing the temperature of the machined surface from rising. However, in the case of the conventional cylinder machining apparatus, There is a problem that the cutting oil is excessively wasted.

Further, in the case of machining the outer diameter of the cylinder, since the time during which the cutting oil supplied to the outer wall of the cylinder stays on the outer wall of the cylinder is short, it is difficult to sufficiently cool the heat generated during the cylinder machining, so that thermal deformation easily occurs in the cylinder. There is a problem that precision processing may be difficult.

Korean Utility Model Publication No. 2000-0020909 (disclosed on December 15, 2000)

Embodiments of the present invention provide a lathe processing apparatus capable of continuously supplying a cutting oil to a cylinder workpiece to prevent the temperature of the cylinder workpiece from being heated to a predetermined temperature or higher.

Embodiments of the present invention also provide a lathe machining apparatus capable of continuous cooling of a cylinder workpiece without additional supply of cutting oil, thereby preventing waste of cutting oil.

According to one aspect of the present invention, there is provided a lathe processing apparatus comprising: a bed provided with a chuck for rotating a cylinder workpiece on one side thereof to provide a work space for machining a cylinder workpiece; A cutting tool movably mounted in the longitudinal direction of the bed to machine the cylinder workpiece; A position measuring device for measuring a position of the cutting tool on the bed; A coolant supply unit provided on the other side of the bed to discharge coolant to the cylinder workpiece; And a controller for receiving the position signal of the cutting tool from the position measuring device and controlling the cutting oil supply unit to inject the cutting oil to the machining part of the cylinder workpiece whose position is changed according to the movement of the cutting tool .

In this case, the coolant supply unit is fixed to the other side of the bed; A transfer screw extending from the body to be parallel with the bed; A spray tank movable along the feed screw and capable of receiving cutting oil therein; A driving screw disposed in parallel with the feed screw so as to be driven to be driven by the jetting tank and providing a driving force to the jetting tank for jetting the cutting oil toward the cylinder workpiece; And a guide bar for guiding the movement of the jetting tank.

The cutting oil supply unit may include a leakage preventive member positioned at both end sides of the cylinder workpiece so that the cutting oil is received in the inner space of the cylinder workpiece; And a supply hose connected to the injection tank to supply the injection oil accommodated in the inner space to the injection tank.

The leakage preventing member may include a finishing ring disposed on an inner wall of the end portion of the cylinder workpiece; And a sealing member disposed between the finishing ring and the inner wall surface of the end portion of the cylinder workpiece.

The position measuring device may further include: a light emitting unit including a plurality of light emitting diodes for emitting light of different colors toward the cutting tool; And a light receiving unit for measuring optical characteristics of the plurality of light emitting diodes reflected from the cutting tool.

Embodiments of the present invention are advantageous in that cutting fluid cooled below a certain temperature is supplied to the cylinder workpiece to effectively cool the cylinder workpiece during machining to prevent thermal deformation of the cylinder workpiece during machining.

Further, the embodiments of the present invention can recover and reuse the cutting oil used for cooling the cylinder workpiece through the supply hose, so that the cylinder workpiece can be continuously cooled without additional supply of cutting oil, There is an advantage that waste can be prevented.

In addition, embodiments of the present invention can accurately measure the position of the cutting tool using an optical measuring instrument, so that when the cutting tool is moved in the longitudinal direction of the bed, the moving speed of the cutting tool and the moving speed of the jetting tank can be matched .

In addition, the embodiments of the present invention have the advantage that the machining portion of the cylinder workpiece can be effectively cooled even if a small amount of cutting oil is used, by accurately spraying the cutting oil on the machining portion of the cylinder workpiece.

1 is an overall side view showing a lathe processing apparatus according to an embodiment of the present invention.
Fig. 2 is a side sectional view of the cutting oil supply unit shown by partially cutting the "AA"
3 is a rear view of the cutting oil supply unit shown in Fig.
4 is a block diagram illustrating the control logic of the lathe processing apparatus according to one embodiment of the present invention.
5 is a state diagram showing a state in which a jetting tank of a cutting oil supply unit is moved according to movement of a cutting tool in a lathe processing apparatus according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION The following description is one of many aspects of the claimed invention and the following description may form part of the detailed description of the invention. However, the detailed description of known configurations or functions in describing the present invention may be omitted for clarity.

While the invention is susceptible to various modifications and its various embodiments, it is intended to illustrate the specific embodiments and the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

And terms including ordinals such as first, second, etc. may be used to describe various elements, but the constituent elements are not limited by such terms. These terms are used only to distinguish one component from another. It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

FIG. 2 is a side sectional view of a cutting oil supply unit shown partially cutting the "AA" line portion of FIG. 1, and FIG. 3 is a cross-sectional view of the cutting tool according to the first embodiment of the present invention. FIG. 4 is a block diagram showing the control logic of the lathe processing apparatus according to an embodiment of the present invention. Referring to FIG.

1 to 4, a lathe machining apparatus according to an embodiment of the present invention includes a bed 100, a cutting tool 200, a position measuring machine 300, a coolant supply unit 400, and a controller (not shown) 500).

Specifically, the bed 100 may be provided as a workbench for machining workpieces. A cutting chuck 110 for holding and rotating the workpiece may be provided at one side of the bed 100 and a cutting oil supply unit 400 for supplying the cutting oil O may be provided at the other side of the bed 100 .

The bed 100 is provided with the necessary components for machining the cylinder work S such as a cutting tool 200, a position measuring machine 300, a coolant supply unit 400 and a controller 500 . In the present embodiment, the cutting operation of the hollow cylinder work S is performed on the bed 100, but the present invention is not limited thereto. The bed 100 may be provided with a process for machining various types of workpieces Of course, the work can be done.

The cutting tool 200 can be installed so as to be movable in the longitudinal direction of the bed 100 for machining the cylinder work S. [ As the cutting tool 200 is moved in the longitudinal direction of the bed 100, the cylinder work S can be machined (cut) in the longitudinal direction as the cutting tool 200 moves.

The position measurer 300 can measure the position of the cutting tool 200 moving on the bed 100 in real time and apply a position signal to the controller 500 about the position of the measured cutting tool 200. The position signal of the cutting tool 200 measured by the position measuring device 300 is transmitted to the controller 500 and can be calculated at the moving speed of the cutting tool 200 in the controller 500. [ At this time, the moving speed of the cutting tool 200 is the same as the moving speed of the machining portion of the cylinder work S, which is processed by the cutting tool 200.

The position measuring device 300 may be configured as an optical measuring device for measuring the position of the cutting tool 200 using light. For example, the position measuring apparatus 300 may include a light emitting unit 310 that emits light toward the cutting tool 200, a light emitting unit 310 that measures the distance of the cutting tool 200 by measuring light reflected from the cutting tool 200 And a light receiving unit 320.

The light emitting unit 310 may include a plurality of light emitting diodes that emit light of different colors. The plurality of light emitting diodes are spaced apart in a matrix form (a row and a column form) toward the cutting tool 200, so that the cutting tool 200, including the machining portion of the cylinder workpiece S, The light can be widely irradiated toward the peripheral configuration of the light source.

The light receiving unit 320 receives the light reflected from the cutting tool 200 and can analyze the optical characteristics of the received light. The light characteristics of the light emitted from the light emitting diode measured at the light receiving unit 320 may include light intensity, chromaticity, peak wavelength, main wavelength, illuminance, color temperature, and color rendering. The light receiving unit 320 receives the light reflected from the cutting tool 200 and analyzes it by matching it with the layout in which the plurality of light emitting diodes are arranged to analyze the light at the specific position reflected by the cutting tool 200, It is possible to accurately output the position of the work S with respect to the machining area.

As described above, the light receiving unit 320 can match the light reflected by the machining portion of the cylinder workpiece S among the light of various colors reflected by the cutting tool 200 to the arrangement type in which the light emitting diodes are arranged, It is possible to accurately measure the position of the cylinder workpiece S on which the cutting is performed with respect to the machining portion. Position information on the machining portion of the cylinder workpiece S measured through the light receiving portion 320 is applied to the controller 500. [

In addition to the optical measuring device, the position measuring device 300 may be used with various types of measuring devices for effectively detecting the position of the cutting tool 200. For example, an ultrasonic measuring device for measuring the position of the cutting tool 200 using ultrasonic waves, or a laser measuring device for measuring a distance through a laser sensor may be used as the position measuring device 300.

The cutting oil supply unit 400 can smoothly process and cool the cylinder workpiece S by spraying the cutting oil O on the backside of the machining area or the machining area of the cylinder workpiece S machined by the cutting tool 200 Can be implemented.

The cutting oil supply unit 400 includes a main body 410, a spray tank 430 for spraying the cutting oil O to the processing site through the spray nozzle 431, a delivery screw 420 for delivering the spray tank 430 A driving screw 440 for providing driving force to the jetting tank 430 and a guide bar 450 for guiding the movement of the jetting tank 430. These conveying screws 420, the driving screws 440 and the guide bars 450 may be horizontally connected to the main body 410 so as to be parallel to the bed 100. These conveying screws 420, the driving screws 440, And the end of the guide bar 450 can be supported by the support piece 460. [

Here, the main body 410 may include a feed motor (not shown) that provides power to move the jet tank 430 and a drive motor (not shown) that provides the necessary driving force to the jet tank 430 . The driving screw 440 is driven and connected to the driving motor to drive the driving force required for spraying and supplying the cutting oil O to the spray tank 430 430). The guide bar 450 guides the movement path of the injection tank 430 when the injection tank 430 is moved, and the balance of the injection tank 430 can be stably maintained.

Particularly, in order to accommodate the cutting oil O injected through the injection tank 430 into the inner space of the cylinder work S, the cutting oil supply unit 400 is provided with the oil leakage preventing member 420 located at the both end sides of the cylinder work S, And a supply hose 480 connected to the spray tank 430 to provide the spray tank 430 with the coolant O accommodated in the inner space.

The leakage preventive member 470 includes a tube-shaped closing ring 471 disposed on the inner wall of the end portion of the cylinder work S and a stop ring 471 disposed between the closing ring 471 and the inner wall surface of the end portion of the cylinder work S Shaped sealing member 472 made of a ring-shaped elastic material. When air is supplied to the finishing ring 471, the finishing ring 471 is expanded to a predetermined volume to block the end portion of the cylinder work S. The coolant O sprayed into the inner space of the cylinder work S is finished Can be accommodated in the inner space of the cylinder work (S) by the ring (471).

Of course, the oil leakage preventing member 470 may be provided in various forms for accommodating the coolant O for a predetermined time in addition to the configuration of the closing ring 471 and the sealing member 472. [ For example, when the coolant supply unit 400 is installed outside the cylinder work S, the oil leakage preventing member 470 may be provided in the form of a reservoir located under the cylinder work S.

The supply hose 480 is supplied with a suction force for sucking the cutting oil O from the drive motor and can supply the coolant O contained in the inner space of the cylinder work S to the spray tank 430. The supply hose 480 continuously circulates the cooling of the cylinder workpiece S without further supply of the cutting oil O by recirculating the coolant O contained in the inner space of the cylinder work S to the injection tank 430 can do. As a result, excessive waste of the cutting oil O can be prevented in advance.

The controller 500 receives the position signal of the cutting tool 200 from the position measuring device 300 and calculates the moving speed of the cutting tool 200. The controller 500 calculates the moving speed of the cutting tool 200, And the rotation motor of the cutting oil supply unit 400 is controlled by the calculated rotation speed so that the cutting oil is supplied to the machining portion of the cylinder work S which varies in position in accordance with the movement of the cutting tool 200, (O) can be accurately sprayed.

For example, since the moving speed of the cutting tool 200 is the same as the moving speed of the machining area, and the rotating speed of the rotating motor is proportional to the moving speed of the machining area, the controller 500 controls the cutting tool 200, The rotational speed of the rotary motor in which the moving speed of the machined portion becomes equal to the jetting position of the cutting oil O can be calculated by using the position signal of the rotary shaft 200. [ The controller 500 applies the operation signal corresponding to the calculated rotational speed of the rotary motor to the cutting oil supply unit 400 so that the machining part of the cylinder work S can be cooled with only a small amount of the cutting oil O have.

Hereinafter, the operation of the present invention will be described.

5 is a state diagram showing a state in which a jetting tank of a cutting oil supply unit is moved according to movement of a cutting tool in a lathe processing apparatus according to an embodiment of the present invention.

1 and 2, the worker may install one end of the cylinder work S so as to be rotatably supported on the working chuck 110 of the bed 100, and the cutting tool 200 as the cylinder work S In a suitable position of the bed 100. [ At this time, oil leakage preventing members 470 for receiving the cutting oil O are provided at both ends of the cylinder work S.

Thereafter, when a power source for machining the cylinder workpiece S is applied to the lathe machining apparatus, processing of the cylinder workpiece S is progressed through the cutting tool 200 in accordance with an operation signal of the controller 500, , And the cutting oil (O) is sprayed to the back surface of the machining area through the spray tank (430) of the cutting oil supply unit (400).

At this time, the cutting oil O sprayed on the inner diameter surface of the cylinder work S is received in the inner space of the cylinder work S by the oil leakage preventing member 470, and sufficiently absorbs heat from the cylinder work S . Thereby, the temperature of the cylinder work S can be prevented from being overheated to the set temperature or more.

The coolant O accommodated in the inner space of the cylinder work S can be supplied to the injection tank 430 through the supply hose 480. At this time, Can be injected again onto the inner surface of the cylinder work (S) through the injection tank (430). Since the coolant O can be reused through the supply hose 480 as described above, it is possible to continuously cool the cylinder work S without further supply of the coolant O, and the excessive amount of the coolant O Waste can be prevented.

5, when the moving speed of the cutting tool 200 and the moving speed of the jet tank 430 are matched with each other when the cutting tool 200 is moved in the longitudinal direction of the bed 100, Even if a small amount of cutting oil O is used, it is possible to effectively cool the back surface of the machining area of the cylinder work S. [

For example, the controller 500 calculates the rotation speed of the rotary motor, which is equal to the moving speed of the machined portion and the injection position of the cutting oil O, using the position signal of the cutting tool 200 applied from the position measuring machine 300 An operating signal corresponding to the calculated rotational speed of the rotary motor is applied to the cutting oil supply unit 400 so that the moving speed of the cutting tool 200 and the moving speed of the spray tank 430 can be matched with each other Thus, it is possible to effectively cool the back side of the machined portion of the cylinder work S through a small amount of cutting oil.

As described above, according to the present invention, by supplying the cutting oil cooled to a certain temperature or lower to the cylinder workpiece, it is possible to effectively cool the cylinder workpiece during machining to prevent thermal deformation of the cylinder workpiece generated during machining, The coolant used for cooling the cylinder workpiece can be recovered and reused, so that cooling of the cylinder workpiece can be continuously performed without additional supply of cutting oil, excessive waste of cutting oil can be prevented, The moving speed of the cutting tool and the moving speed of the jetting tank can be matched with each other when the cutting tool is moved in the longitudinal direction of the bed by accurately measuring the position of the cutting tool using the cutting tool, By correct injection, even if a small amount of cutting oil is used, the machining area of the cylinder workpiece It has excellent advantages such as they can be effectively cooled.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each constituent element depending on the application field or can combine or substitute the embodiments in a form not clearly disclosed in the embodiments of the present invention, Of the range. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that such modified embodiments are included in the technical idea described in the claims of the present invention.

100: Bed 200: Cutting tool
300: Position measuring instrument 400: Coolant supply unit
410: Main body 420: Feed screw
430: jet tank 440: driving screw
450: guide bar 460: support piece
470: Oil leakage prevention member 480: Supply hose
500: controller

Claims (5)

A bed provided on one side of the chuck for rotating the cylinder workpiece, the workpiece being provided with a working space for machining the cylinder workpiece;
A cutting tool movably mounted in the longitudinal direction of the bed to machine the cylinder workpiece;
A position measuring device for measuring a position of the cutting tool on the bed;
A coolant supply unit provided on the other side of the bed to discharge coolant to the cylinder workpiece; And
And a controller for receiving the position signal of the cutting tool from the position measuring device and controlling the cutting oil supply unit to inject the cutting oil to a machining part of the cylinder workpiece whose position is changed according to the movement of the cutting tool,
The position-
A light emitting unit including a plurality of light emitting diodes for emitting light of different colors toward the cutting tool; And
And a light receiving unit for measuring optical characteristics of the plurality of light emitting diodes reflected by the cutting tool. The method according to claim 1,
The coolant supply unit
A main body fixedly installed on the other side of the bed;
A transfer screw extending from the body to be parallel with the bed;
A spray tank movable along the feed screw and capable of receiving cutting oil therein;
A drive screw disposed in parallel with the feed screw to be driven to the injection tank and providing a driving force to the injection tank for injecting the cutting oil toward the cylinder workpiece; And
And a guide bar for guiding the movement of the jet tank. 3. The method of claim 2,
The coolant supply unit
A leakage preventive member positioned at both end sides of the cylinder workpiece so that the cutting oil is received in the inner space of the cylinder workpiece; And
Further comprising a supply hose connected to the jet tank to supply the jetting tank with the cutting oil accommodated in the inner space. The method of claim 3,
The leakage preventing member
A finishing ring disposed on an inner wall of an end of the cylinder workpiece; And
And a sealing member disposed between the finishing ring and the inner wall surface of the end portion of the cylinder workpiece. delete

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