JP2010089188A - Device for feeding cutting oil to tool attached to spindle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for feeding cutting oil to a tool attached to a spindle capable of positively and reliably feeding the cutting oil to the tool attached to the spindle of a machine tool. <P>SOLUTION: A moving body 1 reciprocating along the axial direction of a spindle is arranged at an outer circumference of a spindle cylinder 4, and a nozzle 2 for cutting oil fixed to the moving body 1 is advanced and retracted. Cutting oil to a tool 5 is fed from the nozzle 2 for cutting oil advanced to the vicinity of the tool 5. Thus, the cutting oil of a sufficient amount can be fed to the tool 5 side. When the cutting oil need not be fed, the nozzle 2 for cutting oil is retracted, and returned to a position not forming any obstacle. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cutting oil supply device for a tool mounted on a spindle of a machine tool. In particular, the present invention can positively and surely perform a tool when a cutting oil supply is necessary, and is an obstacle when the supply is unnecessary. The present invention relates to a cutting oil supply device for a tool attached to a main shaft that is formed so as to be housed in a non-contained part.

For example, a tool from an automatic tool changer or the like is inserted into and removed from the spindle of the machine tool, and a desired workpiece is processed by the tool. At the time of machining the workpiece, it is usually necessary to supply cutting oil. For this reason, there are conventionally various cutting oil supply means, such as “Patent Document 1” and “Patent Document 2”.
JP-A-9-57573 (FIG. 1) Japanese Patent Laid-Open No. 10-249669 (FIG. 1)

  “Patent Document 1”, “Japanese Unexamined Patent Publication No. 9-57573”, “Liquid Turbine Built-In Tool Holder and Liquid Circulation Method Used in This Holder” Main liquid passage formed by opening the liquid supplied from the tank (22) side storing the liquid on the base end side shank portion (3) side toward the front end side of the holder body (2). (10) The liquid supplied into the main liquid passage (10) is supplied to the tool (19) attached to the tip of the holder body (2).

  Further, “Cutting fluid supply device to spindle for machine tool” in “JP-A-10-249669” of “Patent Document 2” supplies fluid into a fluid passage formed through a central portion of the spindle. The fluid is supplied to the workpiece (44) from the center of the tool (29) mounted on the main shaft to supply the fluid to the workpiece.

  As described above, the conventional supply device for cutting oil or the like is configured to supply cutting oil or the like to the tool or the workpiece side through a supply path for the fixed cutting oil or the like. Also, in most of the prior art cutting oil supply devices not disclosed here, the supply passage for cutting oil or the like is mostly fixed.

  In the machining of a machine tool or the like, it is necessary to supply cutting oil as described above. However, this supply is necessary at the time of machining the workpiece, and the cutting oil or the like is positively and reliably applied during machining. It must be supplied to the tool or workpiece side. When the supply passage for cutting oil or the like is a fixed type, it is impossible to change the supply passage, and the above function cannot be performed. It is desirable to accurately supply the coolant to the cutting point so that the tool length can be changed.

  The present invention was invented in view of the above circumstances, and when supplying cutting oil, the cutting oil can be supplied to the processing point accurately even if the tool length is changed positively with respect to the tool or workpiece, When cutting oil supply is unnecessary, it is stored in an unobstructed position, and the cutting oil supply direction can be directed to the tool or workpiece side to supply the cutting oil positively and reliably. An object of the present invention is to provide a cutting oil supply device for a tool mounted on a spindle that is compactly assembled as a whole.

  In order to achieve the above object, the present invention provides an apparatus for supplying cutting oil to a tool mounted on a spindle of a machine tool, wherein the apparatus is provided on the outer surface of a spindle cylinder. A movable body that is reciprocally held along the axial direction, and a cutting oil nozzle that is connected to the movable body at the base end side and protrudes substantially in the axial direction and communicates with a cutting oil supply source. It is characterized by that.

  The invention according to claim 2 is characterized in that a plurality of nozzles for the cutting oil are arranged on the movable body.

  The invention according to claim 3 is characterized in that the cutting oil nozzle is arranged facing the tool side at the protruding end.

  The invention according to claim 4 is characterized in that the moving body is driven by a moving body driving unit held by the spindle cylinder.

According to the cutting oil supply apparatus of the first aspect of the present invention, the cutting oil nozzle for supplying the cutting oil to the tool or the workpiece side is held and protruded by the moving body that reciprocates in the axial direction along the outer surface of the spindle cylinder. When the cutting oil is supplied, the cutting oil nozzle can be moved forward and arranged in the vicinity of the tool or workpiece, so that the cutting oil can be positively and reliably supplied.
On the other hand, even if the tool length changes, the cutting oil can be accurately supplied to the machining position by moving in the axial direction.

  Further, according to the cutting oil supply device of the second aspect, since a plurality of cutting oil nozzles are arranged, the cutting oil can be sufficiently supplied to the tool or the workpiece.

  Further, according to the cutting oil supply device of the third aspect, the cutting oil nozzle can have its tip side directed to the tool side, and more reliable and effective cutting oil supply can be achieved.

  Further, according to the cutting oil supply device of the fourth aspect, since the moving body driving unit for reciprocating the moving body is held by the main shaft cylinder, the entire cutting oil supply device of the present invention can be compactly integrated. .

Embodiments of a cutting oil supply device for a tool mounted on a spindle of the present invention will be described in detail below with reference to the drawings.
As shown in FIGS. 4 and 5, the tool 5 accommodated in the automatic tool changer 7 is automatically changed into the spindle cylinder 4 of the headstock 6 via the arm 8. The spindle cylinder 4 is of a cylindrical type in the present embodiment, and the spindle stock 6 is movably supported on the column side (not shown).
The cutting oil supply device 100 to the tool mounted on the spindle of the present invention is arranged to be held by the spindle cylinder 4 as shown in FIGS. 4 and 5, and FIGS. Only the part relevant to the cutting oil supply apparatus 100 to the tool mounted on the spindle of the present invention in FIG. 5 is shown. Further, since the details of the main structure of the cutting oil supply device 100 to the tool mounted on the spindle of the present invention are shown in FIG. 1, the following description will be mainly given with reference to FIG. 1, FIG. 2, and FIG.

  The cutting oil supply device 100 to the tool mounted on the spindle of the present invention is roughly divided into a moving body 1, a cutting oil nozzle 2, a moving body drive unit 3 and the like that are held reciprocally by the spindle cylinder 4. Consists of.

  First, as shown in FIGS. 1 and 2, the moving body driving unit 3 is fixedly disposed at the rear portion of the main barrel 4. The moving body drive unit 3 is cantilevered by a support body 10 fitted in the rear portion of the main shaft cylinder 4 and a base end portion fixed to the upper and lower sides of the support body 10 and extending in the axial direction of the main shaft. The cylinder 11 includes a cylinder 12, a piston 12 that is supported in the cylinder 11 so as to reciprocate along the axial direction of the main shaft, and a hydraulic oil supply unit (not shown) that supplies hydraulic oil to the rear surface of the piston 12. Oil is supplied into the hydraulic oil supply chamber 13 at the rear end of the cylinder 11. Of course, the hydraulic oil is formed to enter and exit the hydraulic oil supply chamber 13.

  The movable body 1 includes a ring body 14 that is slidably supported on the outer periphery of the main shaft cylinder 4 and the outer periphery of the cylinder 11 via seals 16 and 17, and is fixed above and below the ring body 14 and protrudes in the axial direction of the main shaft. The cylinder 15 is connected to the tip of the piston 12.

On the other hand, the cutting oil nozzle 2 is composed of a pipe-like member that extends in the axial direction of the main shaft by connecting the base end portion to the ring body 14, and the cutting oil from a cutting oil supply source (not shown) is supplied to the inside thereof. Is done. Further, as shown in FIG. 3, a plurality of nozzles 2 for the cutting oil are equally arranged along the circumferential direction of the ring body 14.
Further, as shown in FIG. 4, the cutting oil nozzle 2 has a bent portion 2a whose tip is bent toward the tool 5 side.

  As shown in FIGS. 4 and 5, a limit switch 9 for confirming the backward movement of the cylinder 15 is disposed at the rear end of the spindle cylinder 4.

Next, the operation of the cutting oil supply device 100 to the tool mounted on the spindle of the present invention will be described mainly with reference to FIG.
When the hydraulic oil is introduced into the hydraulic oil supply chamber 13 from the hydraulic oil supply source, the piston 12 moves toward the left in FIG. 1, and the cylinder 15 fixed to the piston 12 moves accordingly. Since the cylindrical body 15 is integrally connected to the ring main body 14, the ring main body 14 moves forward (to the left in FIG. 1). This state is indicated by a two-dot chain line in FIGS.

  Since the cutting oil nozzle 2 is fixed integrally with the ring main body 14, the cutting oil nozzle 2 advances as the ring main body 14 advances. As a result, the tip of the cutting oil nozzle 2 moves to the vicinity of the tool 5. Further, since there is a bent portion 2a at the tip of the cutting oil nozzle 2, the outlet of the cutting oil is positioned in the vicinity of the tool 5, thereby sufficiently supplying the cutting oil to the tool side to a long and short tool. it can.

  When the supply of the cutting oil is unnecessary or the tool length is short, the piston 12 moves backward by discharging the hydraulic oil in the cylinder 11 and the cutting oil nozzle 2 returns to the retracted end position. The backward end is confirmed by the limit switch 9.

  In the above description, the main cylinder 4 is a cylinder, and the moving body drive unit 3 of the moving body 1 is as described above. However, the present invention is not limited to this, and the same technical category having the same and similar functions. Of course, these are applied.

  Although the present invention has been described with respect to the cutting oil supply device around the spindle of the machine tool, the present invention can be applied to other departments that require cutting oil, hydraulic oil, and the like, and its use range is wide.

Sectional drawing which shows the detailed structure of the principal part of the cutting oil supply apparatus to the tool with which the main axis | shaft of this invention is mounted | worn. The fragmentary sectional view which shows the whole structure of the cutting oil supply apparatus to the tool with which the main axis | shaft of this invention is mounted | worn. FIG. 3 is an A arrow view of FIG. 2. The top view which shows the relationship between the cutting oil supply apparatus to the tool with which the main axis | shaft of this invention is mounted | worn, and an automatic tool change apparatus. B arrow view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Moving body 2 Cutting oil nozzle 2a Bending part 3 Moving body drive part 4 Spindle cylinder 5 Tool 6 Headstock 7 Automatic tool changer 8 Arm 9 Limit switch 10 Support body 11 Cylinder 12 Piston 13 Hydraulic oil supply chamber 14 Ring body 15 Cylindrical body 16 Seal 17 Seal 100 Cutting oil supply device for tool mounted on spindle

Claims (4)

  A cutting oil supply device to a tool mounted on a spindle of a machine tool, the device being held on an outer surface of a spindle cylinder so as to be reciprocally movable along an axial direction of the spindle, A cutting oil supply device for a tool mounted on a main shaft, comprising: a cutting oil nozzle connected to a base end side and projecting in a substantially axial direction and communicating with a cutting oil supply source.   The cutting oil supply device to the tool mounted on the main shaft according to claim 1, wherein a plurality of nozzles for the cutting oil are arranged on the movable body.   The cutting oil supply device for a tool mounted on a spindle according to claim 1 or 2, wherein the cutting oil nozzle is disposed at a protruding end thereof toward the tool side.   2. The cutting oil supply device for a tool mounted on a spindle according to claim 1, wherein the moving body is driven by a moving body drive unit held by the spindle cylinder.

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