JP2000061718A - Portable hole working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the rotation and feed speeds of a cutting tool variable, and drilling possible even in a corner part, moreover smoothly and correctly move the cutting tool to a working position. SOLUTION: In this portable hole working machine moving a workpiece to drill many holes on the workpiece, a main body frame 31 is movably fitted onto a base frame to be fixed on the workpiece via a rail. A spindle 33 is elevating/rotation freely provided on the frame 31 to perform the elevating and rotation by a servo motor M2 and an inverter motor M1 respectively, to make the feed speed, etc., of a cutting tool variable, and also increase accuracy. A servo motor M2 is made parallel to the spindle 33, and part of the spindle 33 is made approachable to a corner part to facilitate working in the corner parts. The movement of the working machine to the working position can be smooth and correct by the movement of the working machine on the rail.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable hole drilling machine which is placed on a workpiece such as a metal plate to machine a large number of holes in the workpiece.

[0002]

2. Description of the Related Art When drilling holes in a metal plate, use a tabletop drilling machine for small workpieces, and a radial drilling machine for larger workpieces. It is a gate-type five-sided processing machine, and it is usually done individually.

However, when the work piece is large and cannot be placed on a radial drilling machine or a five-sided working machine, an electromagnet drilling machine (commonly known as a magnet drilling machine) or an air drilling machine is used for the human power of the operator. (See Japanese Patent Application Laid-Open No. 5-138416).

Also, when a certain device is completed and hole drilling is required after the installation is completed, the electromagnet type drilling machine,
Alternatively, an air drilling machine is used to drill holes by the manual labor of workers.

Further, for processing on a vertical surface, it is not possible to use an electromagnet type drilling machine, and when using an air drilling machine or a relatively small hole (15 mm or less), a hand drilling machine or JP-A-9- 131607
This is done by a drilling device as shown in the publication.

[0006]

The perforating process by the electromagnet drilling machine is adopted for the processing of the flat surface (vertical hole), but the processing of the vertical surface is not done in principle. Because it is a magnet type, it is easy to come off and dangerous. If it is carried out, the capacity of the magnet should be increased to prevent the magnet from coming off, but it is not possible to avoid danger and it is a waste of electricity.

Further, in the electromagnet type drilling machine and the air drilling machine, it is necessary to move the entire apparatus for drilling at one place for the next drilling. For this reason, the accuracy of the positional relationship between holes (hole pitch) is poor. That is, it is not suitable for processing a plurality of holes.

The drilling device described in Japanese Patent Laid-Open No. 9-131607 can be suitable when the work piece is a shaped steel, but the mounting method for a large surface area becomes complicated.

Further, in a drilling machine using a motor as a drive source, since the motor is arranged on the same axis as the drill (cutting tool), for example, it is impossible to drill a hole near the corner at a right angle. There are cases.

Although each of the above-described hole drilling machines has the above-mentioned problems, the portable machine breaks the drill because the speed of feeding the drill depends on the experience and feeling of the operator by operating the handle. Accidents are easy to occur. Further, in the case where the workpiece is hard steel (S440C etc.) or SUS630 having a surface hardness Hs50 or more obtained by heat treatment (quenching),
It cannot be supported unless the cutting tool is made of high speed steel (high speed steel). In this case, unless the processing speed (feeding speed and rotation speed (cutting speed) of the cutting tool) is optimized, the wear of the high speed steel becomes severe. An accident occurs where the cutting tool is chipped on the surface (machined surface). In order to avoid such a problem, it requires skill to manually optimize the processing speed.

Under the above circumstances, the present invention has the first problem that the feeding speed and the cutting speed can be varied with high accuracy even in the portable hole drilling machine. As far as possible, the second problem is to make it possible, and the third problem is to make it possible to move the processing position smoothly and accurately.

[0012]

In order to achieve the above-mentioned first object, the present invention relates to the rotation speed (cutting speed) of the spindle for mounting the cutting tool in the axial direction (feed speed) by a servomotor. ) Is variably carried by the inverter motor.
If it is variable, the optimum processing state can be obtained. The servomotor can obtain high feed accuracy, and the inverter motor is less expensive than the servomotor.

In order to achieve the second object of the present invention, the spindle and the driving motor thereof are not arranged on the same axis, but the spindle and the shaft center of the driving motor are installed in parallel. If the two are parallel, the diameter of the motor is usually larger than that of the spindle portion, so that the cutting tool can be brought closer to the wall surface by the smaller diameter at the corner.

In order to achieve the third object, the present invention makes a main body frame having a perforation mechanism movable on a base frame. The movement on the base frame can be configured by a rail or the like, and can be performed smoothly and accurately as compared with the case where the main body frame is moved directly on the workpiece.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION As an embodiment of the invention for achieving the above-mentioned first object, there is provided a portable hole drilling machine which is placed on a workpiece to machine a large number of holes in the workpiece. A main body frame placed on the work piece is provided with a spindle having a cutting tool attached to a lower end thereof so as to be rotatable and vertically movable, and a quill for rotatably supporting the spindle is vertically movable. A configuration may be adopted in which rotation is performed by an inverter motor provided on the main body frame and rotation of the quill is performed by a servo motor provided on the main body frame.

As an embodiment of the invention for achieving the above-mentioned second object, there is provided a portable hole drilling machine which is placed on a workpiece to machine a large number of holes in the workpiece. A spindle having a cutting tool attached to its lower end is rotatably and vertically movable on a body frame placed on an object, and a quill for rotatably supporting the spindle at its upper end is also vertically movable. The drive gear is movably in the axial direction and integrally fitted in the rotation direction by spline coupling, and the drive gear is rotatably provided on the main body frame and can be rotated by an electric motor provided on the main body frame. Insert a screw shaft with the same axis as the spindle into the quill and insert it into the spindle so that it can move back and forth.The screw shaft is the output shaft provided on the body frame. It may be employed a configuration which is rotated by the screw shaft and parallel motor.

With this configuration, in addition to the advantage that the cutting tool can be brought close to the wall surface, the accuracy of the cutting tool is increased because the cutting tool is fed by the screw shaft. This is more accurate when used in combination with a servomotor.

An embodiment of the invention that achieves the third object is as follows.
It is possible to adopt a configuration in which the main body frame can be moved along the surface of the work piece and fixed at a predetermined position on a base frame that is placed and fixed on the work piece, and the movement can be performed by a linear guide or the like. It is preferable to use the above rails, and the base frame is fixed by well-known means such as bolting, magnet fixing, and clamping. If the movement is numerically controlled by driving a servomotor, the accuracy can be improved. But in general, bolt holes
It does not require high accuracy and may be moved to the punching position by marking manually.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a portable hole drilling machine of the present invention is shown in FIG.
4 to FIG. 4, in this embodiment, as shown in FIG. 1, a plate-shaped base frame (width: 400 mm, length: 2150).
mm) 10 is provided with a movable table 20, and the processing machine 30 is provided on the movable table 20.

The base frame 10 has a suspension ring 1 on its side surface.
1 is provided, and a hook such as a crane is locked to the suspension wheel 11 to lift the base frame 10 to move the portable hole drilling machine to a required position. Rails 12 and 13 are provided on the upper surface of the base frame 10, and a movable table 20 is mounted on the rails 12 and 13 via a linear guide 21 so as to be movable in the longitudinal direction of the base frame 10. In the figure, 14 is a through hole formed at a required position of the base frame 10, and the base frame 10 is fixed to the base through the through hole 14. That is, this portable hole drilling machine is fixed to the base of the workpiece (see FIG. 8B).

The movable table 20 is capable of moving the rails 12 and 13 on the base frame 10 in the left-right direction (the left-right direction in FIG. 1), and pushes and pulls it to move it to a desired position by human power. The position is fixed by raising and lowering the handle 23. The fine adjustment of the movement amount at this time is performed by turning the handle 23 '. A main body frame 31 of the processing machine 30 is movable back and forth (vertical direction in FIG. 2) on the moving table 20.
The guide member 24 fixed to the movable table 20 prevents the upward movement of the movable table 20 and maintains the standing state. Movement of the processing machine 30 (main body frame 31) in the front-rear direction is accurately performed by turning the handle 22. These movements and fixings are well-known mechanisms of the same construction as those on a lathe. In the figure, 25 is a fixing screw provided on a protruding piece on the lower side surface of the moving table 20, and when the processing machine 30 is located at a predetermined position at the left end of the base frame 10 (state of FIG. 1),
The processing machine 30 is fixed to the base frame 10 by screwing it into the screw hole of the base frame 10 to prevent movement during transportation.

The details of the processing machine 30 are shown in FIG. 4, and a support sleeve 32 is provided on one side of the main body frame 31 so as to be able to move up and down, and a spindle 33 is inserted into this sleeve 32 via a bearing 34 so as to be rotatable. It is supported. A shank hole 35 is formed at the lower end of the spindle 33, and a cutting tool such as a drill D is fitted and mounted in the hole 35.

A spline shaft 34a extends from the middle of the spindle 33 to the vicinity of the upper end thereof.
Reference numeral 4a is vertically movably fitted to a drive gear 36 rotatably provided on the body frame 31. Its drive gear 36
Is rotated by an inverter motor M ₁ on the main body frame 31 via a gear mechanism 37, and this rotation also rotates the spindle 33.

The upper end of the spindle 33 is connected to the body frame 3
1 is rotatably supported by a quill 40 that can move up and down via a bearing 41, and a screw shaft 42 is screwed into a screw bearing 40a of the quill 40.
Is inserted in the hole 33 '. The screw shaft 42 is rotatably supported by a bearing 43 of the main body frame 31, and is rotated by a servo motor M ₂ adjacent to the screw shaft 42 via a gear mechanism 44. The rotation of the screw shaft 42 raises and lowers the quill 40, that is, the spindle 33, and the downward movement determines the feed rate of the cutting tool.

This embodiment is constructed as described above, and is placed on a work piece, a drill D is mounted on a spindle 33 as shown in FIG. 4, both motors M ₁ and M ₂ are driven, and the speed thereof is adjusted. By controlling, drilling is performed at the required drill rotation speed and feed speed. At this time, since the spindle 33 and its feed motor M ₂ are provided in parallel, it is possible to bring the spindle W as close as possible to the wall W as shown in FIG. 4, and it is relatively easy to drill a hole near the corner (distance L). . Further, if the counterbore D'shown in FIG. 5 is attached, counterbore processing can be performed, and in addition, a milling blade or the like can be attached. In the figure, d is a spot facing blade.

Next, if a more concrete example of use of this embodiment is shown, for example, an existing manual forging press machine is modified into a forging press machine A with a transfer feed device B shown in FIG. In this case, upper and lower molds P ₁ ... P ₅ , Q ₁ ... Q ₅
The size of the die holder H changes due to the different position and number of the holes. Therefore, when the mounting hole of the die holder H is not on the bed G, the mounting hole is formed according to this embodiment. For example, in addition to the mounting hole c shown by the solid line in FIG. 7, the mounting hole c shown by the chain line is formed.

In this case, first, the base frame 10 is placed on the bed G so that the shaft center of the spindle 33 corresponds to the mounting holes c of each chain line, and as shown in FIG. To bed G. That is, as shown in FIG. 8A, the screw piece 50 is welded and fixed to the bed G, and the horse clamp 51 and the bolt 52 are fixed to the screw piece 50.
Then, the base frame 10 is fixed to the bed G, or the screw base 53 is welded and fixed to the bed G, and the bolt 52 is screwed into the through hole 14 of the base frame 10 and the like. Fix with.

After fixing the base frame 10, the processing machine 30 is moved back and forth and left and right to form the mounting hole c at a required position. When all the mounting holes c cannot be machined at one fixed position of the base frame 10, the screw piece 50 or the screw base 53 is removed from the bed G, and the base frame 10 is fixed to another position by welding again. Fix and drill holes.

Further, it can be applied not only to the hole drilling on the plane but also to the hole drilling on the side surface. For example, the column h of the bed G shown in FIG.
When mounting the base b of the transfer feed device B on
The base frame 10 may be welded and fixed to the column h via the screw piece 50 or the like to form a hole.

In the embodiment, the processing machine 30 can be moved back and forth, right and left by the base frame 10 and the movable table 20, but the processing machine 30 is directly placed and fixed on the work piece. You can also

[0031]

As described above, according to the present invention, since the cutting tool is fed by the servo motor and the rotation thereof is performed by the inverter motor, highly accurate drilling can be performed. Further, since the spindle and its feed motor are provided in parallel, it is relatively easy to drill holes in the corners. Furthermore, since the processing machine itself can be moved on the base frame,
The processing position can be moved smoothly and accurately.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment.

FIG. 2 is a plan view of the same embodiment.

FIG. 3 is an enlarged left side view of essential parts of the embodiment.

4 is a cross-sectional view of the main part of FIG.

FIG. 5 shows a counterbore tool, (a) is a front view and (b) is a bottom view.

6A and 6B show a forging press machine with a transfer feed device, which is one example of use of this embodiment, in which FIG. 6A is a schematic partially cut plan view and FIG.

FIG. 7 is an explanatory diagram of the same usage example.

FIG. 8 is an explanatory view of attachment to a bed according to this embodiment.

[Explanation of symbols]

10 base frame 12 and 13 rail 20 moving base 21 linear guide 23 handle 30 processing machine 31 main body frame 32 sleeve 34 spindle 34a spline shaft 36 drive gear 40 quill 42 screw shaft 50 screw piece 51 horse clamp 52 bolt 53 screw base M ₁ inverter Motor M ₂ Servo motor D Drill D'Spotting tool G Base (bed, workpiece)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Eiji Nakamura             Next to 917 Takadacho, Kohoku Ward, Yokohama City, Kanagawa Prefecture             Hama Retrofit Co., Ltd. F-term (reference) 3C036 EE10 EE18

Claims (4)

[Claims] 1. A workpiece G placed on a workpiece G to be processed.
A portable hole drilling machine for drilling a large number of holes in a main body frame 31 placed on the workpiece G, and a spindle 33 having cutting tools D and D ′ attached to the lower end thereof can be rotated and moved up and down. And the spindle 3
A quill 40 that rotatably supports 3 is provided so that it can be raised and lowered.
Rotation of the spindle 33 is performed by an inverter motor M ₁ provided on the main body frame 31, and lifting and lowering of the quill 40 is performed by a servo motor M ₂ provided on the main body frame 31, respectively. Machine. 2. The work G is placed on the work G to be processed.
A portable hole drilling machine for drilling a large number of holes in a main body frame 31 placed on the workpiece G, and a spindle 33 having cutting tools D and D ′ attached to the lower end thereof can be rotated and moved up and down. And the spindle 3
40 for rotatably supporting 3 with its upper end
Is provided so as to be able to move up and down, and the drive gear 3 is splined to the spindle 33.
7 is movably in its axial direction and is integrally fitted in its rotational direction, and its drive gear 37 is rotatably provided on the main body frame 31 and can be rotated by an electric motor M ₁ provided on the main body frame 31. A screw shaft 42 having the same axis as the spindle 33 is threaded through the quill 40 and inserted into the spindle 33 so as to be able to move back and forth. The output shaft provided in the main body frame 31 is parallel to the screw shaft 42. A portable hole drilling machine characterized by being rotated by an electric motor M ₂ . 3. The portable hole drilling machine according to claim 2, wherein the spindle rotating electric motor M ₁ is an inverter motor, and the screw shaft rotating electric motor is a servomotor M ₂ . 4. The body frame 31 is movable along the surface of the workpiece G and can be fixed at a required position on the base frame 10 mounted and fixed on the workpiece G. The portable hole drilling machine according to any one of claims 1 to 3, which is characterized.