JPS637487Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field The present invention relates to a cutting fluid supply device for a machine tool, and has a plurality of cutting fluid nozzles that can automatically change the jetting angle of the cutting fluid according to the length and diameter of the tool. This invention relates to a cutting fluid supply device for machine tools.

Prior Art When supplying cutting fluid or cutting oil to the cutting section of a machine tool, the angle of the cutting fluid supply nozzle is automatically adjusted within the pivot angle range according to the length of the cutting tool,
A cutting fluid supply device that changes the cutting fluid injection angle is already known. In addition, there is already a cutting fluid injection device in which multiple cutting fluid injection ports are rotatably provided on a coolant plate attached to the front of the spindle head of a machine tool, and the cutting fluid is supplied from multiple directions to the tool during cutting. It is publicly known. However, in the case of the former known device, a method is adopted in which a single cutting fluid supply nozzle is pivoted by the action of a fluid pressure cylinder device, and therefore, depending on the workpiece shape and tool type, the cutting fluid supply nozzle may be Appropriate cutting fluid supply may not be possible. For example, when cutting is performed by inserting the cutting edge of a tool into a recess of a workpiece, the cutting fluid may not reach the machining location by adjusting the pivoting of one cutting fluid supply nozzle. In order to eliminate this inconvenience and ensure that cutting fluid is supplied to the desired location, multiple cutting fluid supply nozzles are provided around the tool spindle, and at this time, an actuator that changes the injection angle of the cutting fluid supply nozzle is installed. It is conceivable to provide one for each nozzle so that all the cutting fluid supply nozzles are automatically and independently oriented in any spray direction. However, such a configuration inevitably has problems in that it becomes difficult to control the operation of the actuator, and the structure around the tool spindle becomes complex and disordered, making it difficult for the tool spindle to approach the workpiece.

On the other hand, in the case of the latter known cutting fluid supply device mentioned above, a method is adopted in which the rotation of the plurality of cutting fluid injection ports is manually adjusted, which not only reduces the automation rate of the machine tool but also reduces the rotation. In order to make adjustments, the operator must approach a dangerous machining area where chips and cutting fluid are scattered, which poses problems in terms of operability and health and safety.

Purpose of the invention Therefore, in view of the above-mentioned conventional technical problems, the purpose of the present invention is to make it effective when applied to machine tools, especially automatic machine tools that automatically perform cutting of workpieces by changing tools. As a cutting fluid supply device, the jetting angle of multiple cutting fluid nozzles can be changed all at once using a single actuator placed near the tool spindle head, and the structure of the actuator itself can be changed using simple mechanical elements. It is therefore an object of the present invention to provide a cutting fluid supply device for a machine tool constructed as described above.

Composition of the invention According to the invention, a plurality of cutting fluid nozzles are pivotally provided in a machine frame portion surrounding the tool spindle of a spindle head of a machine tool and have injection openings facing the tip of the tool spindle; a rotatable cam disc attached to the machine frame and having a plurality of cam grooves for adjusting nozzle pivoting cam-engaged with the plurality of cutting fluid nozzles; and a rotatable cam disc for rotating the cam disc. a nozzle pivoting drive device that simultaneously pivots the injection openings of the plurality of cutting fluid nozzles in respective desired injection directions via the plurality of cam grooves; and a cutting fluid supply coupled to the plurality of cutting fluid nozzles. A cutting fluid supply device for a machine tool is provided, characterized in that it is equipped with a source. With this configuration, if the cam disk is rotated by starting the drive device for pivoting the nozzle described above, the plurality of the above-mentioned units can be rotated according to the tool dimensions such as tool length and tool diameter. The cutting fluid nozzles can be pivoted in unison to change their spray angle. Therefore, by adjusting the amount of rotation of the cam disk, cutting fluid can be automatically supplied from multiple directions at the same time from multiple cutting fluid nozzles toward the machining location where the tool and workpiece are engaged in cutting. Moreover, unlike the case of a single cutting fluid supply nozzle, the cutting fluid can always reach the machining location. The drive device for pivoting the nozzle described above may be composed of a gear provided on the outer periphery of the cam disk, a drive gear that meshes with the gear, and a motor that provides rotational motion to the drive gear. Alternatively, instead of the driving gear, a rack may be meshed with the gear of the cam disk, and a cylinder device may be used to impart reciprocating motion to the rack. Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

FIG. 1 is a partial front view showing the main parts of the cutting fluid supply device for a machine tool according to the present invention, and FIG.
It is a side view seen from the direction of the arrow in the figure. 1 and 2, reference numeral 10 denotes a spindle head of a machine tool, and a spindle 12 is supported inside the spindle head 10 so as to be rotatable at high and low speeds. Tools 14 having various dimensions such as tool length and tool diameter are mounted on this main shaft 12. Note that if the machine tool is an ordinary machine tool such as a boring machine that is operated by an operator's operation, the tool 14 is also attached to and detached from the spindle 12 by the operator's operation, but a well-known automatic tool It is well known that in the case of automatic machine tools equipped with an exchange device, various tools 14 are automatically exchanged between the tool magazine and the spindle 12.

When tools 14 of various tool sizes are attached to and detached from the spindle 12 by automatic exchange, the attached tools 14
The position of the cutting part where the workpiece and the workpiece to be cut engage are also different, for example, the end face 12a of the main shaft 12.
Conditions such as the axial distance from the center to the cutting part differing depending on the tool length, and the radial distance from the central axis C of the spindle 12 to the cutting part differing depending on the tool diameter, etc. occur. do. For these various conditions, the cutting fluid injection supply direction is automatically adjusted according to the difference in tool dimensions, and the main shaft 12 is always maintained.
It is necessary to supply cutting fluid at the same time from multiple directions to the cutting work point of the tool 14 attached to the tool 14 to appropriately supply the cutting fluid.

Now, according to the present invention, a plurality of cutting fluid nozzles 16 are provided around the tip of the outermost machine frame 10a of the spindle head 10. These cutting fluid nozzles 16 each have a cutting fluid injection port 18 that opens toward the front of the spindle head 10, and are supplied from a cutting fluid supply source (not shown) through a conduit 26 in the direction of arrow "S". Cutting fluid is supplied to the rear end 20.
Note that, as a method for distributing and supplying cutting fluid from the conduit 26 to each rear end 20 of each cutting fluid nozzle 16, the conduit 26 itself is configured in advance with a plurality of conduits of the same number as the number of nozzles, and the cutting fluid is distributed through the plurality of conduits. The cutting fluid may be supplied to each cutting nozzle 16 individually from a single cutting fluid supply source, or the machine frame 1
One supply member 40 is provided in a fixed arrangement around the fluid supply member 40, and a common fluid path communicating with the conduit 26 is formed inside this fluid supply member 40, and the common fluid path and the rear end 20 of each cutting fluid nozzle 16 are connected to each other. It is also possible to have a structure that communicates with the Each cutting fluid nozzle 16 is pivotally attached to the periphery of the machine frame 10a so that the spray angle θ of the cutting fluid with respect to the central axis C of the spindle head 10 can be varied in size. For example, when connecting the plurality of conduits 26 and the plurality of cutting fluid nozzles 16 described above, a bracket is fixedly attached or integrally formed around the machine frame 10a, and each cutting fluid is connected to the bracket through a pivot member. The structure may be such that the nozzles 16 are pivotally mounted, and when the liquid supply member 40 is fixedly provided on the machine frame 10a, the rear end 20 of each cutting liquid nozzle 16 is formed into a spherical bearing structure to supply the liquid. The liquid member 40 is rotatably received in a spherical seat formed in a common liquid path, and the cutting liquid injection port 18 and the liquid supply member 40 are commonly connected to each other in the rear end 20 of the spherical bearing, regardless of the injection angle θ. It is sufficient to form a liquid path that is always in communication with the liquid path.

On the other hand, a cam disk 28 is rotatably provided around the machine frame 10a of the spindle head 10 to which the plurality of cutting fluid nozzles 16 are attached. The rotating structure of the cam disk 28 may be such that the cam disk 28 is mounted around the machine frame 10a via a sleeve-shaped sliding bearing or a rotary bearing. The cam disk 28 also has a plurality of cam grooves 30 as shown in FIG.
are formed, each of the cutting fluid nozzles 16 described above penetrates each of the cam grooves 30, and the cam grooves 30 are
0 hole wall and the outer periphery of each cutting fluid nozzle 16 are in cam engagement as described below. In other words, the cam groove 30 is such that the cam disk 28 is connected to the machine frame 10 as described above.
When the cutting fluid nozzles 16 are rotated around point a, the cutting fluid nozzles 16 are rotated so as to change the cutting fluid jet direction of each of the engaged cutting fluid nozzles 16, that is, the jet angle θ in FIG. 1 within a pre-designed and selected angle range. It has a cam shape for pivoting. The specific shape of the cam may be, for example, a substantially elliptical diagonal groove as shown in FIG. Further, the outer periphery of the cam disc 28 is formed as an external gear 32, and the cam disc 28 is attached to the external gear 32.
The machine frame 10a of the spindle head 10 is used as a rotational drive source in advance.
A drive gear 34 attached to the output shaft of a motor 38 fixedly attached to the outer periphery is engaged with the drive gear 34.
Therefore, when the motor 38 is rotated in the forward or reverse direction, the cam disk 28 is rotated at a reduced speed in the forward or reverse direction in accordance with a constant tooth ratio between the external gear 32 and the drive gear 34. Therefore, if the cam groove 30 is formed in advance so that the cutting fluid injection angle θ of each cutting nozzle 16 is made smaller by the forward rotation of the cam disk 28, then by the reverse rotation of the cam disk 28, the cutting fluid injection angle θ of each cutting nozzle 16 is reduced. The cutting fluid injection angle θ becomes larger. Therefore, by adjusting the amount of rotation of the cam disk 28 according to the tool dimensions of the tool 14 mounted on the main shaft 12, the cutting fluid can be sprayed from the cutting fluid spout 18 of each cutting nozzle 16 to a desired point on the tool 14. It can be supplied by injection. The present invention is characterized in that it is possible to direct the plurality of cutting fluid nozzles 16 all at once in a desired cutting fluid injection direction by rotating the single cam disc 28. For this purpose, if the amount of rotation of the motor 38 is adjusted using, for example, an electric volume (not shown), the cam disk 28 will rotate over a desired rotation angle, and all the cutting nozzles 16 will be oriented in the desired cutting fluid injection direction. In addition, when the tools 14 are automatically exchanged in a fixed order between the main spindle 12 of the machine tool and the tool magazine of the automatic tool changer, the tool number of each tool 14 and the cam disk 2
8 and the rotation amount is stored in advance in the automatic control device of the machine tool, and each time, the automatic control device controls the rotation amount of the motor 38 so that the cam disk 28 corresponds to each tool 14. If the cutting fluid is rotated by the rotation angle, it is possible to automatically control the jetting direction of the cutting fluid that is jetted from each cutting fluid injection port 18 of the cutting fluid nozzle 16 toward the processing section.

In addition, the shape of the plurality of cam grooves 30 formed in the cam disk 28 is designed in consideration of the fact that when cutting fluid is injected, the tip tends to droop downward due to the influence of gravity, and each cutting It is preferable that the cutting fluid injection angles θ of the fluid nozzles 16 are not necessarily made equal, but are corrected so that they each reach the desired cutting fluid supply point of the processing section. Furthermore, if a plurality of cutting fluid nozzles 16 are arranged at equal intervals around the machine casing 10a of the spindle head 10, the cutting fluid jet flow converging in a substantially conical shape can spray the tool 14 and the workpiece to be cut. The structure is such that it is supplied toward the cutting section. However, for example, two cutting fluid nozzles 16 are arranged close to each other as a pair, a plurality of such pairs of cutting fluid nozzles 16 are arranged at appropriate intervals around the machine frame 10a, and two strips are applied to the machining area from multiple directions. A configuration may also be adopted in which a cutting fluid jet stream is supplied.

The present invention has been described above, focusing on the illustrated embodiment, but by rotating a single cam disk 28, a plurality of cutting fluid nozzles 16 are simultaneously directed in a desired direction corresponding to differences in tool dimensions. Various modifications can be made based on the orientation, for example, the motor 38 drives the externally toothed drive gear 34 and the cam disc 28.
Instead of a configuration in which the cam disc 28 is rotationally driven through engagement with the external gear 32, the cam disc 28
It is also possible to have a configuration in which a linear rack is meshed with the external gear 32, and the rack is moved in a linear reciprocating manner by a hydraulic or pneumatic cylinder device. Further, in the case of the above-mentioned embodiment in which the rear end 20 of each cutting nozzle 16 is formed into a spherical bearing structure, each cutting nozzle 16 swings only within one plane in which the cutting fluid injection angle θ is changed in size. Practically speaking, it is desirable to arrange a guide disk having an appropriate guide restriction groove in front of the cam disk 28.

Effects of the invention As is clear from the above explanation, according to the invention, a single cam disc driven by a single motor or cylinder device is used as an actuator to simultaneously pivot a plurality of cutting fluid nozzles. Cutting fluid can be sprayed towards the machining area from any direction.
When applied to automatic machine tools such as NC machine tools such as machining centers, cutting fluid supply that appropriately corresponds to various tool sizes can be achieved using an automatic control method. In addition, in the present invention, a cutting fluid supply device for a machine tool is constructed whose main structural elements are multiple cutting fluid nozzles, one cam disk, and a cam disk rotation device driven by gear transmission, and the device has a complicated and special mechanical structure. Since no elements are used, the overall structure is simple, and since various structures are not installed around the spindle head in a messy and complicated manner, the accessibility of the tool spindle to the workpiece is maintained well. Furthermore, since the cutting fluid is supplied from multiple directions by automatically adjusting the cutting fluid jet direction from multiple cutting fluid nozzles, there may be blind spots in the cutting fluid supply unlike when supplying from a single conventional nozzle. In addition, since there is no manual intervention by the operator, safety can be ensured, which in turn improves the accuracy, reliability and automation rate of machine tool cutting, and also extends the useful life of the tool.

[Brief explanation of the drawing]

Fig. 1 is a partial front view showing the main parts of an embodiment of the cutting fluid supply device for a machine tool according to the present invention;
The figure is a partial side view seen from the direction of the arrow in FIG. 1. 10...Spindle head, 10a...Machine frame, 12...Spindle, 14...Tool, 16...Cutting fluid nozzle, 18
... Cutting fluid injection port, 20 ... Rear end, 26 ... Conduit, 28 ... Cam disk, 30 ... Cam groove, 32 ...
...External gear, 34... Drive gear, 38... Motor.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A plurality of cutting fluid nozzles which are rotatably provided in a machine frame surrounding the tool spindle of the spindle head of a machine tool and have injection openings facing the tip of the tool spindle. ,
a plurality of cam grooves for adjusting nozzle pivoting which are cam-engaged with the plurality of cutting fluid nozzles; a rotatable cam disk attached to the machine frame; a nozzle pivoting drive device that pivots the injection openings of the plurality of cutting fluid nozzles in the respective desired injection directions via the plurality of cam grooves; and a cutting device coupled to the plurality of cutting fluid nozzles. 1. A cutting fluid supply device for a machine tool, comprising: a fluid supply source. 2 Utility Model Registration Scope of Claim 1 In the cutting fluid supply device for a machine tool as set forth in claim 1, the drive device for pivoting the nozzle includes a gear provided on the outer periphery of the cam disc and a drive gear meshing with the gear. and,
A cutting fluid supply device for a machine tool, comprising a motor that provides rotational motion to the drive gear. 3 Utility Model Registration Scope of Claim 1 In the cutting fluid supply device for a machine tool, the drive device for pivoting the nozzle includes a gear provided on the outer periphery of the cam disk, and a rack that meshes with the gear. , and a cylinder mechanism that provides reciprocating motion to the rack.