JP3653500B2 - Anti-coolant liquid and chip splash prevention device around spindle head of machine tool - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a coolant liquid and chip scattering prevention device around the spindle head of a machine tool, and more particularly, to a coolant liquid and chips generated during machining operations in various machine tools such as a spindle through tool and a cutting device having an external coolant mechanism. The present invention relates to a coolant solution and a chip scattering prevention device around a spindle head of a machine tool that can efficiently prevent the scattering of the machine tool.
[0002]
[Prior art]
Various machine tools are widely used for cutting metal materials, including a spindle-through tool that is supported by a rotary cutting tool such as a drill at the tip of a spindle head and driven by a spindle motor. In many cases, an external coolant mechanism that cools a cutting tool or a workpiece during a cutting operation is provided. When cutting with these machine tools, it is inevitable that chips and coolant generated by cutting scatter around the processed part.
[0003]
[Problems to be solved by the invention]
For this reason, as shown in FIG. 1, the vinyl nolen 24 is suspended so as to cover the cutting tool 2 around the spindle head 1, but the vinyl nolen 24 is not rigid and lacks durability, Further, since it easily deforms when it interferes with the convex part of the work 15 or the work clamp parts, it is impossible to expect a sufficient scattering prevention effect without leaving the time zone.
[0004]
On the other hand, if the periphery of the spindle head and cutting tool is covered with a rigid outer cover made of a rigid material such as a steel plate, scattering of chips and coolant generated during machining operations can be effectively prevented. However, since the spindle head descends in the direction of the workpiece as the machining progresses, the lower edge of the outer peripheral cover interferes with the convex part of the workpiece and workpiece clamping parts, creating a gap. The outer cover may be deformed or damaged. If the lower edge of the outer cover is moved away from the tool edge so as not to interfere with these, a large gap will be created between the lower edge of the outer cover and the workpiece, and the function of preventing the scattering of chips and coolant liquid is It will drop significantly.
[0005]
In addition, it is difficult to install an outer peripheral cover with sufficient effect around the spindle head in large drilling machines, etc., giving up the outer cover from a cost standpoint, and measures against scattering of chips and coolant. There was a case that I did not take at all.
[0006]
An object of the present invention is to solve the above-mentioned conventional problems relating to prevention of scattering of chips and coolant generated during cutting work by various machine tools such as a spindle-through tool, such as vinyl nolene, etc. It is not too late like this, and while using a rigid and sturdy metal cover, it securely covers the periphery of the spindle head without interfering with the convex part of the work or work clamp parts, etc. It is an object of the present invention to provide an apparatus for preventing coolant and chips from being scattered around the spindle head of a machine tool having a high practical value that can effectively prevent the chips and coolant that are generated during the process from being scattered.
[0007]
[Means for Solving the Problems]
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 at a lower portion of the spindle head 1, and the movable cover 12 is moved to the spindle through an up-and-down lifting mechanism. on the outside of the head 1, by allowed to vertically slidably supported in a state of being urged downwardly by a weak pressing force of the spring 11 than the pressing force of the upper and lower elevating mechanism, around the spindle head generated during machining operations It is intended to prevent splashing of coolant and chips. In this case, the hydraulic cylinder 7 is used as the up-and-down lifting mechanism, or a combination of the servo motor 19 and the ball screw 21 attached to the movable cover 12 is used.
[0008]
Embodiment
FIG. 2 is a side view of the first embodiment of the coolant and chip scattering prevention device around the spindle head of the machine tool according to the present invention, and FIG. 3 is a plan view thereof.
[0009]
In the figure, reference numeral 1 denotes a spindle head of a spindle through tool, which is supported by a support arm 13 of a gantry (not shown) so as to be vertically slidable. A cutting tool 2 such as a drill is fixed to the lower end of the spindle head 1 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 of the spindle head 1, and a slider 5 of the linear guide 22 is attached to the guide protrusion 4.
[0010]
A base block 6 having a thick plate shape 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. The piston rod 9 is positioned so as to be parallel to the axis of the spindle head 1.
[0011]
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. It is biased downward, that is, toward the workpiece 15. The spring force of the spring 11 is set to be weaker than the extension force of the piston rod 9 of the hydraulic cylinder 7.
[0012]
On the other hand, reference numeral 12 in the figure denotes a movable cover, which is made of a solid metal material having rigidity such as a steel plate, and is formed so as to surround the spindle head 1 from three sides except for the support arm 13 side as shown in FIG. The upper end of the piston rod 9 is connected to the arm member 14 provided on the inner side of the arm member 14 to constitute a vertical drive mechanism. The arm member 14 slides up and down as the piston rod 9 expands and contracts. In the figure, reference numeral 23 denotes a partition wall provided on the inner side of the movable cover 12, which prevents the coolant liquid and chips from scattering in the direction of the hydraulic cylinder 7. Reference numeral 25 denotes a fixed cover, which is positioned above the movable cover 12.
[0013]
The base block 6 supporting the hydraulic cylinder 7 is urged downward by a spring 11 and abuts against the stopper 16 at the lower end of the guide ridge 4 to keep its position, and is stronger than the spring force of the spring 11. When the base block 6 receives an upward force , the slider 5 moves upward along the guide protrusion 4 against the spring 11.
[0014]
The vertical dimension of the movable cover 12 is such that a very small gap 18 is formed between the lower end 17 and the upper surface of the work 15 in a state where the tip of the cutting tool 2 is caught on the work 15 as shown in FIG. There is no length.
[0015]
This embodiment has the configuration as described above, and in the state shown in FIG. 2, the cutting tool 2 is rotated to start machining the workpiece 15, and the cutting tool 2 bites the workpiece 15 and cutting proceeds. When the lower edge 17 of the movable cover 12 comes into contact with the upper surface of the work 15, the movable cover 12 is guided by the guide ridge 4 together with the hydraulic cylinder 7 against the elastic force of the spring 11, as shown in FIG. While sliding upwards. Therefore, excessive force is not applied to the lower edge 17 of the movable cover 12, and the lower edge 17 is not deformed or damaged.
[0016]
In this way, when the cutting tool 2 reaches about 10 mm in the workpiece 15, the hydraulic cylinder 7 is actuated at that time, and the movable cover 12 is lifted upward by an appropriate amount as shown in FIG. to continue.
[0017]
In this embodiment, the movable cover 12 and the hydraulic cylinder 7 that slides the movable cover 12 in the vertical direction are elastically supported around the main shaft 1 by the linear guide 22 and the spring 11. The work can be performed while keeping the gap 18 between the upper surface of the workpiece 17 and the upper surface of the workpiece 15 to a minimum, and it is possible to efficiently prevent the scattering of chips and coolant.
[0018]
Next, based on FIG. 6, FIG. 7, 2nd embodiment of the spindle head periphery coolant liquid and chip | tip scattering device which concerns on this invention is described.
[0019]
In this embodiment, a servo motor 19 is used instead of the hydraulic cylinder 7 in the first embodiment, and the rotating shaft 20 of the servo motor 19 is provided on the arm member 14 of the movable cover 12. The movable cover 12 slides a certain amount in the vertical direction in proportion to the amount of rotation of the rotary shaft 20. In addition, since the other part is the same as the above-mentioned 1st embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0020]
In the second embodiment, since the movable cover 12 is vertically slid by the servo motor 19 and the ball screw 21, the vertical movement of the movable cover 12 can be further controlled by using the NC control method. It is. In other words, the rising timing and slide amount of the movable cover 12 are programmed in advance, and the fixed cover 12 is moved upward in synchronization with the lowering of the spindle head 1 as shown in FIG. 7 using a mirror image of the NC function. The gap between the lower edge 17 of the movable cover 12 and the upper surface of the work 15 can be made as small as possible, and the coolant liquid and chips can be scattered more efficiently.
[0021]
At this time, 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 as in the case of the first embodiment. Even if the movable cover 12 slides upward against the elasticity of the spring 11 together with the servo motor 19 even when trying to interfere with the convex portion of the upper surface 15 or the work clamp member, deformation and damage of the movable cover 12 are prevented.
[0022]
In the above-described embodiments, the spindle through tool is described as an example of a machine tool. Of course, it is all subject to this.
[0023]
【The invention's effect】
As described above, the spindle head peripheral coolant liquid and the chip scattering prevention device of the machine tool according to the present invention are adapted to slide the movable cover appropriately upward in accordance with the progress of processing. This has the effect of minimizing the splattering of the chips and coolant that are generated automatically.
[0024]
In addition, since the movable cover is slidably supported while being urged downward by a spring together with its vertical drive mechanism, even if the lower edge of the movable cover interferes with the upper surface of the work, it slides upward, so the movable cover It does not apply excessive force, has the effect of not being deformed or damaged, etc., and has also been used for large-scale drilling machines that have conventionally been difficult to install a fixed cover for preventing the dispersion of coolant and chips. It can be installed at low cost and has extremely high practical value.
[Brief description of the drawings]
FIG. 1 is a side view of an example of an anti-scattering device for coolant and chips of a conventional spindle-through tool using vinyl nolen.
FIG. 2 is a side view of the first embodiment of the coolant around the spindle head and the chip scattering preventing device of the machine tool according to the present invention.
FIG. 3 is a plan view of the same.
4 is a side view showing a state where the fixed cover 12 is in contact with the surface of the work 15 and the fixed cover 12 is slid upward. FIG.
FIG. 5 is a side view of the state where the hydraulic cylinder 7 is operated and the fixed cover 12 is pulled upward as the machining progresses.
FIG. 6 is a side view of a second embodiment of the coolant around the spindle head and the chip scattering prevention device of the machine tool according to the present invention.
7 is a side view showing a state where the servo motor 19 is operated and the fixed cover 12 is lifted upward by a necessary amount as the machining progresses. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Spindle head 2 Cutting tool 4 Guide protrusion 5 Slider 6 Base block 7 Hydraulic cylinder 8 Base 9 Piston rod 10 Arm material 11 Spring 12 Movable cover 13 Support arm 14 Arm material 15 Workpiece 16 Stopper 17 Lower edge 18 Gap 19 Servo motor 20 Rotating shaft 21 Ball screw 22 Linear guide 23 Bulkhead 24 Vinyl nolene 25 Fixed cover

Claims (3)

The spindle head 1 and allowed position of the movable cover 12 has rigidity so as to surround the cutting tool 2 provided at the lower portion of the spindle head 1, on the outside of the spindle head 1 the movable cover 12 through the vertical lifting mechanism, the while urged toward the spring 11 weaker pressing force than the pressing force of the downward vertical lifting mechanism, vertically slidable spindle head peripheral coolant for a machine tool, characterized in that allowed support and chip scattering prevention device . 2. The machine head spindle periphery coolant liquid and chip scattering prevention device according to claim 1, wherein the vertical lifting mechanism is a hydraulic cylinder. The apparatus for preventing coolant around the spindle head of the machine tool and the swarf scattering of the machine tool according to claim 1, wherein the vertical elevating mechanism comprises a servo motor (19) and a ball screw (21) attached to the movable cover (12).

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