JP3176162U - Rotating nozzle for coolant and coolant injection device - Google Patents

Abstract

The present invention provides a coolant rotating nozzle excellent in chip removal function and a coolant injection device using the same.
A rotary nozzle for coolant that injects coolant supplied by a coolant supply pipe. A cylindrical nozzle support cylinder 21 attached to the coolant supply pipe (connection pipe 13), and a cylindrical nozzle member having a base end portion 25 rotatably supported in the nozzle support cylinder and a tip end portion serving as a coolant injection port 28A. 23. The coolant injection port of the nozzle member is disposed at a position shifted from the rotation axis of the base end portion, and the coolant injection direction from the coolant injection port of the nozzle member is inclined with respect to the rotation axis of the base end portion. .
[Selection] Figure 2

Description

  The present invention relates to a rotary nozzle for coolant and a coolant injection device.

In cutting and grinding, in order to remove heat and chips generated in a work part of a workpiece, a coolant such as a cutting agent or an abrasive is sprayed on the work part.
Conventionally, as nozzles for injecting coolant, there are nozzles (see Patent Document 1) that allow coolant to be injected intensively on a processing site, and nozzles that can adjust the direction of coolant injection (see Patent Document 2). Are known.

The former nozzle forms a plurality of flow holes parallel to the axis of the nozzle in the nozzle, and by injecting the coolant from the injection port through the plurality of flow holes, the coolant injection angle is reduced, and the processing part is The structure allows the coolant to be injected intensively.
In the latter nozzle, a resin tube is inserted into the joint body, and a nozzle body having a spherical portion on the outer periphery of the base end portion is fitted outside the resin tube, and the spherical portion of the nozzle body is supported so as to be slidable. The structure is such that the direction of coolant injection can be adjusted by screwing the tightening nut into the joint body and changing the direction of the nozzle body.

Japanese Utility Model Publication No. 7-24542 JP 2008-36810 A

All of the conventional nozzles described above have a structure that allows the coolant to be intensively injected to a desired position such as a machining site, so that the swarf scattered over the entire machining space of the machine tool is about to flow out of the machining space. Then, it is necessary to arrange a large amount of nozzles so that the entire processing space can be covered, and a large amount of coolant is required to be supplied to the nozzles.
Therefore, if the coolant injection angle from the nozzle is increased so that the coolant spreads over a wide range of the processing space so that the number of nozzles is reduced, the injection force of the coolant is weakened. It will decline.

  The purpose of the present invention is to provide a coolant rotating nozzle capable of injecting coolant in a wide range and with a high injection force, that is, a coolant rotating nozzle excellent in chip removal function and a coolant injection device using the same. There is to do.

  The rotary nozzle for coolant of the present invention is a rotary nozzle for coolant that injects coolant supplied by a coolant supply pipe, and a cylindrical nozzle support tube attached to the coolant supply pipe, A cylindrical nozzle member rotatably supported in a nozzle support cylinder and having a distal end portion serving as a coolant injection port, and the coolant injection port of the nozzle member is disposed at a position shifted from the rotation axis of the base end portion The coolant injection direction from the coolant injection port of the nozzle member is inclined with respect to the rotation axis of the base end portion, and the inclination axis does not intersect the rotation axis. It is characterized by that.

According to this device, when the coolant is supplied, the supplied coolant passes through the cylindrical nozzle member that is rotatably supported in the nozzle support cylinder from the coolant supply pipe, and is injected from the coolant injection port at the tip. The
At this time, the coolant injection port of the nozzle member is disposed at a position shifted from the rotation axis of the base end portion, and the coolant injection direction from the coolant injection port of the nozzle member is inclined with respect to the rotation axis of the base end portion. And since the inclination axis is in a direction that does not intersect the rotation axis, the nozzle member is rotated with the base end portion as the rotation axis by the injection force of the coolant injected from the coolant injection port.
Then, since the coolant injection port of the nozzle member is swung with the base end portion as the rotation axis, the coolant from the coolant injection port is also injected radially with the base end portion as the rotation axis, resulting in a wide range and high injection of coolant. Can be injected with force. Therefore, since the chips scattered in a wide range can be efficiently discharged (removed), it is possible to provide a rotary nozzle for coolant having an excellent chip removing function.

In the coolant rotating nozzle according to the present invention, it is preferable that the coolant injection port of the nozzle member is gradually wider and flattened toward the tip.
According to this device, since the coolant injection port is gradually wider and flattened toward the tip, the coolant passing through the nozzle member toward the coolant injection port at the tip hits the flat portion. Then, since a rotational force is given to the nozzle member thereby, it can be rotated at a higher speed. Moreover, since a coolant is injected radially from a coolant injection port, the chip removal effect can be further enhanced.

In the rotary nozzle for coolant of the present invention, a male screw is formed on the outer peripheral surface of the tip of the coolant supply pipe, and a collar portion larger than the outer diameter of the tip is formed on the outer periphery of the intermediate portion of the nozzle support tube. It is preferable that the cap nut which penetrates the front-end | tip part of the said nozzle support cylinder, holding the said collar part, is screwed together by the said external thread.
According to this device, if the cap nut is removed from the male screw of the coolant supply pipe, the nozzle member can be detached from the coolant supply pipe together with the nozzle support tube. For this reason, even when the nozzle is regularly cleaned, it can be easily attached and removed, so that maintenance work can be easily performed.

A coolant injection device of the present invention is a coolant injection device that injects coolant into a machining space of a machine tool, and is connected to a coolant supply pipe disposed in the machining space of the machine tool and the coolant supply pipe The coolant rotary nozzle includes any one of the above-described coolant rotary nozzles.
According to this device, chips scattered in the processing space of the machine tool can be efficiently removed. At the same time, since the coolant can be sprayed onto the work part and tool of the workpiece, the heat generated in them can be efficiently removed.

The figure which shows the example which applied the coolant injection apparatus of this invention to the machine tool. The perspective view which shows the rotary nozzle for coolant of this invention. The figure seen from the III arrow direction of FIG. Sectional drawing which shows the rotary nozzle for coolant same as the above. The figure which shows the modification 1 of the rotary nozzle for coolant same as the above. The figure which shows the modification 2 of the rotary nozzle for coolant same as the above. The figure which shows the modification 3 of the rotary nozzle for coolant same as the above.

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a horizontal machining center as a machine tool to which a coolant injection device of the present invention is applied.
The horizontal machining center 1 includes a base 2 and a column 3 arranged on one side of the base 2. A first table 4 is provided on the upper surface of the base 2 so as to be movable in the front-rear direction (X-axis direction). It is provided to be movable. A spindle head 6 is provided in the column 3 so as to be movable up and down (Y-axis direction). The spindle head 6 includes a spindle 7 that is horizontally supported and rotated by a motor (not shown). A machining tool 8 is attached to the tip of the main shaft 7 so as to be exchanged by an automatic tool changer (ATC) (not shown). The periphery of the base 2, that is, the periphery and the upper surface of the processing space is covered with a cover 9.

The coolant injection device 10 is connected to a coolant supply main pipe 11 disposed at an upper position in the processing space, a coolant supply branch pipe 12 branched from the coolant supply main pipe 11, and the coolant supply main pipe 11 and the coolant supply branch pipe 12. A plurality of coolant rotary nozzles 20 connected via a pipe 13.
When coolant is supplied to the coolant supply main pipe 11 by a pump (not shown), the coolant passes through the coolant supply main pipe 11, the coolant supply branch pipe 12, and the connection pipe 13 from the coolant rotary nozzle 20 into the processing space. After being injected, the fuel is collected below the base 2, returned to the pump through a filter (not shown), and then circulated through the path by the pump.
As shown in FIG. 4, the connection pipe 13 is formed with a male thread 13 </ b> A at the outer peripheral portion and a tapered surface 13 </ b> B that gradually increases in diameter toward the tip end surface of the connection pipe 13. Yes. Here, the coolant supply main pipe 11, the coolant supply branch pipe 12 and the connection pipe 13 constitute a coolant supply pipe.

  As shown in FIGS. 2, 3, and 4, the coolant rotary nozzle 20 includes a cylindrical nozzle support cylinder 21 that is attached to a coolant supply main pipe 11 or a coolant supply branch pipe 12 via a connection pipe 13, and a basic nozzle support cylinder 21. A cylindrical nozzle member 23 whose end is rotatably supported in the nozzle support cylinder 21 and whose tip is a coolant injection port, and a cap nut 29 that detachably attaches the nozzle support cylinder 21 to the connection pipe 13 are provided. Configured.

  The nozzle support cylinder 21 has a flange 22 having an inner diameter that is substantially the same as the inner diameter of the connection pipe 13 and an outer diameter that is slightly smaller than the outer diameter of the connection pipe 13 at an intermediate position on the outer peripheral surface. One end surface of the flange 22 is abutted against the front end surface of the connection pipe 13, and the other end surface is held by the cap nut 29.

The nozzle member 23 includes a nozzle body 24 and a nozzle tip 28 attached to the tip of the nozzle body 24.
The nozzle body 24 includes a cylindrical base end 25 that is rotatably fitted to the inner diameter of the nozzle support cylinder 21, a cylindrical bent portion 26 that is bent at a right angle from the tip of the base end 25, A cylindrical distal end portion 27 is bent at a right angle from the distal end of the bent portion 26 to the side opposite to the base end portion 25. The open end of the base end portion 25 is widened to the outside at a right angle to form a flange portion 25 </ b> A, and a collar 31 is inserted between the flange portion 25 </ b> A and the nozzle support cylinder 21.
The nozzle tip portion 28 is a cylindrical shape whose base end is fitted to the tip end portion 27 of the nozzle main body portion 24, and is flattened in the middle from the base end toward the tip end and is gradually widened from the base end. The coolant injection port 28 </ b> A is inclined at a predetermined angle α with respect to the rotation axis of the 24 base end portions 25 and is bent in a direction in which the inclination axis does not intersect the rotation axis. That is, the coolant injection port 28 </ b> A is disposed at a position shifted from the rotation axis of the base end portion 25 by a predetermined distance a, and the coolant injection direction from the coolant injection port 28 </ b> A is predetermined with respect to the rotation axis of the base end portion 25. It is inclined at an angle α, and the inclination axis does not intersect the rotation axis.

  The cap nut 29 has a through hole 29 </ b> A through which the tip of the nozzle support cylinder 21 penetrates at the center, and is screwed into the male screw 13 </ b> A of the connection pipe 13 while holding the flange 22 inside.

In such a configuration, when the coolant is supplied, the supplied coolant passes through the nozzle member 23 rotatably supported in the nozzle support cylinder 21 from the coolant supply main pipe 11, the coolant supply branch pipe 12 and the connection pipe 13. It is injected from the coolant injection port 28A at the tip.
At this time, the coolant injection port 28A is disposed at a position deviated from the rotation axis of the base end 25, and the coolant injection direction from the coolant injection port 28A is inclined with respect to the rotation axis of the base end 25, and Since the inclined axis is in a direction that does not intersect the rotational axis, the nozzle member 23 is rotated about the base end 25 as the rotation axis by the injection force of the coolant injected from the coolant injection port 28A.
Then, since the coolant injection port 28A of the nozzle member 23 is turned with the base end portion 25 as the rotation axis, the coolant from the coolant injection port 28A is also injected radially. As a result, the coolant can be injected over a wide range and with a high injection force, so that chips scattered over a wide range can be efficiently discharged (removed). Therefore, the rotary nozzle for coolant excellent in the chip removal function can be provided.

  Further, since the coolant injection port 28A is gradually wider and flattened toward the front end, the coolant passing through the nozzle member 23 toward the coolant injection port 28A hits the flat portion. Then, since the rotational force is given to the nozzle member 23 by this, it can be rotated at higher speed. In addition, the coolant is injected radially by the wide tip shape of the coolant injection port 28A. Therefore, the chip removal effect can be further enhanced.

  Further, a male screw 13A is formed on the outer peripheral surface of the tip of the connection pipe 13, and a flange 22 is formed on the outer periphery of the intermediate portion of the nozzle support tube 21. The tip of the nozzle support tube 21 is held while holding the flange 22 Since the cap nut 29 to be penetrated is screwed to the male screw 13A, the nozzle member 23 can be removed from the connection pipe 13 together with the nozzle support tube 21 by removing the cap nut 29 from the male screw 13A of the connection pipe 13. it can. For this reason, even when the nozzle is regularly subjected to maintenance work, for example, cleaning or the like, it is easy to attach and remove, so the maintenance work can be easily performed.

<Modification>
The present invention is not limited to the above-described embodiments, but includes modifications and improvements as long as the object of the present invention can be achieved.
In the above-described embodiment, the base body portion 24 is rotatably fitted to the inner diameter of the nozzle support cylinder 21, the bent portion 26 bent at a right angle from the base end portion 25, and the bent portion 26. However, the present invention is not limited to this, and as shown in FIG. 5, the bent portion 26 is 90 ° with respect to the proximal end portion 25. Even if it is formed by being bent obliquely at an angle of less than 0 ° and the tip portion 27 is bent at about 135 ° with respect to the bent portion 26, substantially the same effect as in the above example can be expected.

  Further, as shown in FIG. 6, the nozzle main body 24 is composed of a base end portion 25 that is rotatably fitted to the inner diameter of the nozzle support cylinder 21, and a bent portion 26 that is bent from the base end portion 25. The nozzle tip 28 may be fitted to the bent portion 26. That is, the tip end portion 27 of the nozzle body 24 may be omitted.

Moreover, in the said embodiment, although the nozzle member 23 was comprised by two members, the nozzle main-body part 24 and the nozzle front-end | tip part 28, you may comprise these by one member. That is, the tip portion of the nozzle body 24 may be formed to be gradually wider and flattened toward the tip.
Further, as shown in FIG. 7, the nozzle tip 28 is omitted, the tip 27 of the nozzle body 24 is tilted at a predetermined angle α with respect to the rotation axis of the base 25, and the tilt axis is You may bend in the direction which does not cross | intersect with respect to a rotating shaft. Even in this case, substantially the same effect can be expected.

  Further, in the machine tool of the above embodiment, the horizontal machining center 1 is capable of moving the workpiece W in the X-axis direction and the Z-axis direction and the main shaft 7 is movable in the Y-axis direction. In other words, the present invention can be applied to all machine tools that perform machining while the relative movement of the spindle 7 (the table on which the workpiece W is placed) and the spindle 7 moves relative to each other.

  The present invention can be used for efficient discharge of chips in machine tools.

1 ... Horizontal machining center (machine tool),
10 ... Coolant injection device,
11 ... Coolant supply main pipe (coolant supply pipe),
12 ... coolant supply branch pipe (coolant supply pipe),
13 ... Connection piping (coolant supply piping),
13A ... Male thread,
20 ... Rotary nozzle for coolant,
21 ... Nozzle support tube,
22 ... Buttocks,
23 ... Nozzle member,
24 ... Nozzle body,
23 ... Nozzle member,
25 ... proximal end,
28 ... Nozzle tip,
28A ... Coolant injection port,
29 ... Cap nut.

Claims (4)

A coolant rotating nozzle for injecting coolant supplied by a coolant supply pipe,
A cylindrical nozzle support tube attached to the coolant supply pipe;
A cylindrical nozzle member having a base end portion rotatably supported in the nozzle support cylinder and a tip end portion serving as a coolant injection port;
The coolant injection port of the nozzle member is disposed at a position shifted from the rotation axis of the base end portion, and the coolant injection direction from the coolant injection port of the nozzle member is relative to the rotation axis of the base end portion. The coolant rotating nozzle is characterized in that the inclined axis is in a direction that does not intersect the rotational axis. The rotary nozzle for coolant according to claim 1,
The coolant nozzle of the nozzle member is formed so as to be gradually wider and flattened toward the tip. In the rotary nozzle for coolant according to claim 1 or 2,
A male screw is formed on the outer peripheral surface of the tip of the coolant supply pipe,
A flange having a diameter larger than the outer diameter of the tip is formed on the outer periphery of the intermediate portion of the nozzle support cylinder,
A rotary nozzle for coolant, wherein a cap nut that passes through the tip of the nozzle support tube while holding the flange is screwed into the male screw. A coolant injection device for injecting coolant into a machining space of a machine tool,
A coolant supply pipe disposed in the processing space of the machine tool;
A coolant rotating nozzle connected to the coolant supply pipe;
The coolant injection nozzle according to any one of claims 1 to 3, wherein the coolant rotation nozzle is the coolant rotation nozzle.

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