JP2003211341A - Coolant liquid and cutting chip dispersion preventing device in circumference in main spindle head for machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of dispersion of cutting chips and coolant liquid to the circumference of a machining part during machining work of various types of machine tools such as a spindle through device, which is conventionally prevented by a vinyl short curtain suspended in the circumference of a main spindle head, but the vinyl curtain with no rigidity and poor durability is just a temporary expedient, and when a strong movable cover having the rigidity is used, a movable cover hem, a projecting part of a work, and a work clamping component are interfered with one another, exhibiting insufficient dispersion preventing effect. <P>SOLUTION: The movable cover 12 having the rigidity is positioned surrounding the main spindle head 1 of the machine tool and a cutting device 2 provided in the lower part of the main spindle head 1, and the movable cover 12, pulled downward by a spring 11, is vertically slidably supported outside of the main spindle head 1 via a vertical lift mechanism. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing coolant and chips from scattering around the spindle head of a machine tool, more specifically, for various machine tools such as a spindle through tool and a cutting device having an external coolant mechanism, during machining work. The present invention relates to a coolant liquid and chip scattering prevention device around a spindle head of a machine tool, which can efficiently prevent the generated coolant liquid and cutting chips from scattering.

[0002]

2. Description of the Related Art Various machine tools such as a tool for a spindle through which a rotary cutting tool such as a drill is rotatably supported at the tip of a spindle head and is driven by a spindle motor are widely used for cutting metal materials. . Further, an external coolant mechanism for cooling the cutting tool or the work during the cutting work is often provided. When cutting with these machine tools, it is inevitable that chips and coolant liquid generated by cutting will be scattered around the machined part.

[0003]

For this reason, as shown in FIG. 1, it has been attempted to suspend the vinyl Noren 24 around the spindle head 1 so as to cover the cutting tool 2, but the vinyl Noren 24 is also suspended. Is not rigid and has poor durability.
Since it is easily deformed when it interferes with the convex portion of 5 and the work clamp component, it was impossible to expect a sufficient scattering prevention effect without leaving a deadline.

On the other hand, if the periphery of the spindle head and the cutting tool is covered with an outer peripheral cover made of a rigid and rigid material such as a steel plate, the scattering of chips and coolant liquid generated during machining is effective. However, since the spindle head gradually descends in the direction of the workpiece as the machining progresses, the lower edge of the outer peripheral cover interferes with the convex portion of the workpiece, workpiece clamp parts, etc. In some cases, the outer peripheral cover was deformed or damaged. If the lower edge of the outer peripheral cover is separated from the cutting edge of the tool so as not to interfere with these, a large gap will be created between the lower edge of the outer peripheral cover and the workpiece, and the function of preventing scattering of cutting chips and coolant It will be greatly reduced.

Further, it is difficult to mount an outer peripheral cover having a sufficient effect on the periphery of the spindle head in a large-sized drilling machine, and it is difficult to attach the outer peripheral cover from the viewpoint of cost, and chips, coolant liquid, etc. are given up. In some cases, no measures were taken to prevent the scattering of.

An object of the present invention is to solve the above-mentioned conventional problems relating to the prevention of scattering of chips and coolant liquid generated during cutting work by various machine tools such as spindle through tools. Although it is not a makeshift one like vinyl noren, it uses a rigid and robust metal cover, and firmly covers the spindle head periphery without interfering with the convex parts of the work or work clamp parts, The purpose of the present invention is to provide a device for preventing coolant and chips from scattering around the spindle head of machine tools with high practical value that can effectively prevent the scattering of chips and coolant that occur during processing work. is there.

[0007]

According to the present invention, a movable cover 12 having rigidity is positioned so as to surround a spindle head 1 of a machine tool and a cutting tool 2 provided below the spindle head 1, and the movable cover 12 is provided. The spindle head 1 via a vertical lifting mechanism
By being supported by the spring 11 so that it can be slid up and down, while being pulled downward by the spring 11,
It is intended to prevent the coolant liquid and cutting chips from scattering around the spindle head during machining work. Further, in that case, a hydraulic cylinder 7 is used as the vertical moving mechanism, or a combination of a servo motor 19 and a ball screw 21 attached to the movable cover 12 is used.

[0008]

FIG. 2 is a side view of a first embodiment of a coolant and chip scattering prevention device around a spindle head of a machine tool according to the present invention, and FIG. 3 is a plan view thereof.

In the drawing, reference numeral 1 denotes a spindle head of a tool for spindle through, which is supported by a supporting arm 13 of a pedestal (not shown) so as to be vertically slidable. And this spindle head 1
A cutting tool 2 such as a drill is fixed to the lower end of the spindle, and is rotated by a spindle motor (not shown) installed above the spindle head 1. A guide protrusion 4 of the linear guide 22 is formed on the side surface of the spindle head 1 along the axis thereof, and a slider 5 of the linear guide 22 is attached to the guide protrusion 4.

A thick plate-shaped base block 6 is fixed to the outside of the slider 5, and a base portion 8 of a hydraulic cylinder 7 is attached to the base block 6, and the hydraulic cylinder is mounted on the base block 6. 7 is positioned such that its piston rod 9 is parallel to the axis of the spindle head 1.

An arm member 10 is provided on the side surface of the spindle head 1 below the guide ridge 4, and a spring 11 is stretched between the arm member 10 and the base block 6, so that the base is The block 6 is biased downward, that is, toward the work 15.

On the other hand, reference numeral 12 in the drawing denotes a movable cover, which is made of a rigid and rigid metal material such as a steel plate and surrounds the spindle head 1 from three sides excluding the supporting arm 13 side as shown in FIG. The end of the piston rod 9 is connected to the arm member 14 which is formed and is provided inside thereof to form a vertical drive mechanism, which slides up and down as the piston rod 9 expands and contracts. Reference numeral 23 in the drawing denotes a partition wall provided inside the movable cover 12 to prevent the coolant and the cutting chips from scattering toward the hydraulic cylinder 7. Further, 25 is a fixed cover, which is located above the movable cover 12.

The base block 6 supporting the hydraulic cylinder 7 is biased downward by a spring 11 and abuts against a stopper 16 at the lower end of the guide ridge 4 to hold its position. When the base block 6 receives an upward force stronger than the force, the slider 5 moves upward along the guide ridge 4 against the spring 11.

The vertical dimension of the movable cover 12 is such that there is a very small gap between the lower end 17 of the cutting tool 2 and the upper surface of the work 15 when the tip of the cutting tool 2 bites the work 15, as shown in FIG. It is a length that 18 can not be done.

This embodiment has the structure as described above, and the cutting tool 2 is rotated in the state shown in FIG.
5, the cutting progresses and the lower edge 17 of the movable cover 12
4, the movable cover 12 slides upward while being guided by the guide ridges 4 together with the hydraulic cylinder 7 against the elastic force of the spring 11, as shown in FIG. Therefore, no unreasonable force is applied to the lower edge 17 of the movable cover 12, and the lower edge 17 is not deformed or damaged.

In this way, when the cutting tool 2 reaches the inside of the work 15 by about 10 mm, at that point the hydraulic cylinder 7
5, the movable cover 12 is pulled up by an appropriate amount as shown in FIG. 5, and the operation is further continued.

In this embodiment, the movable cover 1
2 and the hydraulic cylinder 7 for sliding it vertically are elastically supported around the main shaft 1 by the linear guide 22 and the spring 11, so that a gap 18 between the lower edge 17 of the movable cover 12 and the upper surface of the work 15 is provided. Therefore, it is possible to perform work while keeping the amount to a minimum, and it is possible to efficiently prevent scattering of chips and coolant.

Next, with reference to FIGS. 6 and 7, a second embodiment of the device for preventing coolant and chips scattering around the spindle head of a machine tool according to the present invention will be described.

In this embodiment, a servomotor 19 is used instead of the hydraulic cylinder 7 in the first embodiment, and the rotary shaft 20 of the servomotor 19 is attached to the arm member 14 of the movable cover 12. The movable cover 12 is screwed onto a ball screw 21 provided, and the movable cover 12 slides in the vertical direction by a certain amount in proportion to the amount of rotation of the rotary shaft 20. Since the other parts are the same as those in the first embodiment, the same reference numerals are given and the description thereof will be omitted.

In the second embodiment, since the movable cover 12 is slid up and down by the servo motor 19 and the ball screw 21, the vertical movement of the movable cover 12 is controlled more finely by using the NC control method. It is possible. That is, the rising timing of the movable cover 12 and the slide amount can be programmed in advance, or N
Using the mirror image of the C function, the fixed cover 12 can be slid upward in synchronization with the downward movement of the spindle head 1 as shown in FIG. The gap between and can be made as small as possible, and the coolant and chips can be scattered more efficiently.

At this time, as in the case of the first embodiment, the servo motor 19 is attached to the spindle head 1 so as to be slidable up and down while being elastically pulled downward by the spring 11, so that the program should not be run. Even if a mistake is made to interfere with the convex portion on the upper surface of the work 15 or the work clamp member, the movable cover 12 slides upward together with the servo motor 19 against the elasticity of the spring 11, so that the movable cover 12 is prevented from being deformed or damaged. It

Although all of the above embodiments have described a spindle through tool as an example of a machine tool, various types of machine tools such as machine tools having an external coolant mechanism that may have splashes of coolant or cutting chips during processing work. It goes without saying that all machine tools are targeted.

[0023]

As described above, the device for preventing coolant and chips scattering around the spindle head of the machine tool according to the present invention is configured such that the movable cover can be appropriately slid upward as the machining progresses. This has the effect of minimizing the scattering of chips and coolant that are inevitably generated during processing work.

Further, since the movable cover is supported by the vertical drive mechanism so that it can be slid up and down while being pulled by a spring, even if the lower edge of the movable cover interferes with the upper surface of the work, it slides upward, so that it is movable. It has the effect of not applying excessive force to the cover, it will not be deformed or damaged, etc., and it is difficult to install a fixed cover for preventing the scattering of coolant and cutting chips. Moreover, it can be installed at low cost and has an extremely high practical value.

[Brief description of drawings]

FIG. 1 is a side view of an example of a conventional device for preventing the scattering of coolant and chips of a tool for spindle through using vinyl noren.

FIG. 2 is a side view of the first embodiment of the device for preventing coolant and chips scattering around the spindle head of a machine tool according to the present invention.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view showing a state where the fixed cover 12 contacts the surface of the work 15 and the fixed cover 12 slides upward.

[Fig. 5] Similarly, with the progress of processing, the hydraulic cylinder 7
FIG. 4 is a side view showing a state in which the fixed cover 12 is pulled up by operating the.

FIG. 6 is a side view of a second embodiment of a device for preventing coolant and chips scattering around a spindle head of a machine tool according to the present invention.

[Fig. 7] Similarly, as the machining progresses, the servo motor 19
FIG. 4 is a side view showing a state in which the fixed cover 12 is pulled up by a necessary amount by operating the.

[Explanation of symbols]

1 spindle head 2 cutting tools 4 guide ridges 5 slider 6 base blocks 7 hydraulic cylinder 8 base 9 Piston rod 10 arm material 11 spring 12 Movable cover 13 Supporting arm 14 Arm material 15 work 16 stopper 17 Lower edge 18 void 19 Servo motor 20 rotation axis 21 ball screw 22 Linear guide 23 partitions 24 Vinyl Noren 25 Fixed cover

Claims (3)

[Claims] 1. A movable cover 12 having rigidity is positioned so as to surround a spindle head 1 and a cutting tool 2 provided at a lower portion of the spindle head 1, and the movable cover 12 is moved up and down via a vertically elevating mechanism. An apparatus for preventing coolant and chips scattering around a spindle head of a machine tool, which is supported so as to be vertically slidable in a state of being pulled downward by a spring 11 on the outside of. 2. The device for preventing coolant and chips from scattering around the spindle head of a machine tool according to claim 1, wherein the vertical lifting mechanism is a hydraulic cylinder 7. 3. The scattering liquid for coolant and chips around the spindle head of a machine tool according to claim 1, wherein the vertically moving mechanism comprises a servomotor 19 and a ball screw 21 attached to the movable cover 12. apparatus.