JPS61136704A - Radial drilling machine - Google Patents

Abstract

PURPOSE:To facilitate zero-point setting for the reference of a spindle center by installing, on a foundation, a free-flow type spindle head movable in each of longitudinal, lateral and vertical directions, and a table movable in both longitudinal and lateral directions. CONSTITUTION:After moving a spindle head 35 in each of longitudinal, lateral and vertical directions, a lever 38 is pulled to have a spindle 36 lowered. Subse quently, a drill edge 41 and the conical part of a replaced centering probe (not shown infigure) are fitted toward the hole of a work W until they correctly set in there. A slide base 31, a strut 32 and a slider (not shown in figure) are clamped respectively and the digital counter 20, 21 of a table 10 are reset as well as the position of the spindle head 35is fixed, thus the zero-point setting for a reference is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) This invention relates to a free-flow type radial drilling machine.

(Prior Art) A conventional drilling machine and its related technology, such as a milling machine, have the following features in terms of structure and effect.

■ Conventionally, there have been free-flow type radial drilling machines that can move the spindle head in the front and back, left and right, and up and down directions, but their tables have been limited to fixed types. This drilling machine has the feature that it can quickly drill holes in workpieces that have already been marked or punched.

■Also, conventional drill presses with a cross table have a cross table attached to the base, and the cross table can be forcibly driven forward, backward, left and right, but the spindle head can only be moved up and down.

■Furthermore, conventional milling machines and boring machines have a structure in which the spindle head moves vertically and horizontally, and the base is forcibly driven back and forth.

(Problems to be Solved by the Invention) However, each of the above-mentioned conventional techniques also has the following problems.

In the drilling machine (2), the table on which the work is placed does not move, so it is not suitable for tasks such as quickly drilling multiple holes with fixed pitch intervals when the work does not have pilot holes for marking or punching.

With the drilling machine (2), it was not possible to quickly align the spindle center with the reference hole or reference surface of the workpiece, or so-called reference zero point alignment.

That is, since the cross table is forcedly driven, the table cannot be moved freely. Therefore,
It was necessary to adjust the reference zero point using a dial gauge or visually confirming the approach to the centering lever.

In the milling machine and boring machine (2), like the above-mentioned drilling machine with a cross table, the table was forcibly driven, so it was not possible to quickly set the reference zero point.

Structure of the Invention (Means for Solving the Problems) A free-flow spindle head that can move in the front-back, left-right, and up-down directions, and a table that can move in both the front-back and left-right directions are provided on a base. I took this method.

(Function) To adjust the reference zero point of the spindle center, move the free-flow type spindle head in each direction and align the centering probe attached to it with the workpiece. This is done by two steps. At this time, there is no need to move the table. Therefore, the reference zero point alignment can be performed quickly and easily.

Further, when drilling holes, the table on which the work is installed is moved back and forth and left and right. Therefore, accurate drilling can be performed with high positional accuracy and pitch accuracy without providing a pilot hole for marking or punching on the workpiece.

In addition, since the spindle head is a free-flow type, if there are workpieces in various positions on the table, if multiple workpiece mounting jigs are installed on the table, or if the hole pitch of the workpiece is large, etc. The head can be easily moved when resetting zero point adjustment, etc.

(Example) An example of a radial drilling machine embodying the present invention will be described below with reference to the drawings.

As shown in Figures 1 to 4, two slide pars 2 for forward and backward feeding extending in the front-rear direction are fixed on the base 1, and an intermediate support plate 3 is movable back and forth on the slide pars 2. It is placed. That is, four slide bushes 4 attached to the front and rear of the lower surface of the intermediate support plate 3 are slidably fitted to the slide par 2. Slide bush 4
Of these, the sliding surface for the slide par 2 is made of synthetic resin that has low sliding resistance and excellent wear resistance.

A support member 5 having a female threaded hole is attached to the intermediate portion of all slide bushes 4 of the intermediate support plate 3. A feed shaft 6 having a male thread (worm) on the outer periphery is screwed into this female threaded hole, and the feed shaft 6 extends back and forth between the two slide pars 2. The front end of the feed shaft 6 is rotatably supported by a bearing 7 but cannot be moved back and forth, and a handle 8 for forward and backward feeding is attached to the front end of the feed shaft 6.

Two slide pars 9 for left-right feeding extending in the left-right direction are fixed on the intermediate support plate 3, and a table 10 is placed above the slide pars 9 so as to be movable left and right.

That is, four slide bushes 11 similar to the slide bushes 4 are attached to the left and right sides of the lower surface of the table 10, and are slidably fitted to the slide pars 9 for left and right feeding.

A rack gear 12 extending left and right is provided at the center of the support plate 23 on the lower surface of the table 10, and a small-diameter pinion gear 13 meshes with the rack gear 12.

A large-diameter reduction gear 14 attached to the same shaft as the pinion gear 13 meshes with a feed shaft 15 having gears on its outer periphery. The feed shaft 15 extends back and forth on the right side of the slider 2 for forward and backward feeding, and the front end of the feed shaft 15 is rotatably but not movably back and forth supported by a bearing 16. A large-diameter reduction gear 17 is attached to the front end of the feed shaft 15, and a left-right feed handle 19 is attached to the same shaft as a small-diameter reduction gear 18 that meshes with the gear 17.

With the above configuration, as the handle 8 for forward/backward feeding and the handle 19 for left/right feeding rotate, the table 10
is designed to move back and forth and left and right. Distance traveled by table 10 per revolution of each handle 8.19 (
The feed amount) is set to approximately 10 mm. Also,
On the sides of each handle 8° 19 are digital counters 20, 2 that display the distance the table IO has moved back and forth or left and right.
1 is provided. The digital counters 20 and 21 used in this embodiment are inexpensive wire drawer type counters, and are of the type that store the cumulative value even if they are set to zero in the middle.

Note that a general work chuck 22 for holding a work is placed on the table 10.

Next, other parts of this embodiment will be explained.

A column 32 is fitted into the slide base 31 from the upper surface thereof so as to be movable up and down, and a joint 33 is attached to the upper end of the column 32. A slider 34 is fitted into the joint 33 from the front thereof so as to be movable back and forth, and a spindle head 35 is supported at the front end of the slider 34.

The above slide base 31, support column 3.2 and slider 34
Each has a hydraulic movement mechanism (not shown) for moving left and right, up and down, and front and back, and a clamp mechanism therefor, and the movement mechanism is driven by operating a handle (not shown). As described above, the spindle head 35 is configured as a free-flow type that can move in the front and rear, left and right, and up and down directions by the slide base 31, the support column 32, the joint 33, and the slider 34.

A spindle 36 extends downward from the spindle head 35, and the spindle 36 is rotated by a motor 37 provided at the top of the spindle head 35, and is rotated by a lever 3 provided at the side of the spindle head 35.
It is designed to move up and down by manually operating 8. Quick change holder 3 is attached to spindle 35.
9 is attached to the holder 37, and a drill chuck 4o or a centering probe to be described later is detachably attached to the holder 37. A drill blade 41 is detachably attached to the drill chuck 40.

Next, the centering probe, which is a jig that is attached to the quick change holder 39 and used when performing reference zero point alignment of the spindle center, will be described.

The centering probe 51 shown in FIG. 5 is used when the reference for zero point alignment is a hole P provided in the workpiece W, and the lower part has an apex 52 that enters the hole P at the center of the spindle. It has a conical portion 53 provided for extension. The centering probe 54 shown in FIG. 6 is used when the reference for zero point alignment is a vertical surface Q provided on the workpiece W, and the lower part has a cylinder cut in half. It has a semi-cylindrical member 56 having a vertical surface 55 on an extension of the spindle center. This vertical surface 5
5 comes into contact with the vertical surface Q.

Now, the usage method of this embodiment configured as above will be explained, and the effects will also be described.

First, in order to perform the reference zero point alignment of the spindle center with respect to the reference hole P provided in the workpiece W such as a round object, as shown in FIG. The workpiece W is held between the two, and the centering probe 51 is attached to the quick change holder 39.

Next, after moving the spindle head 35 in the front and back, left and right, and up and down directions, the lever 38 is pulled to lower the spindle 36, and the conical part 53 of the centering probe 51 is brought into proper contact with the hole P of the workpiece W. Insert until the end. In this state, clamp the slide purse 31, support column 32, and slider 34, respectively, and remove the spindle head 3.
By fixing the position of 5 and resetting the digital counters 20 and 21 of the table 10, the reference zero point adjustment is completed.

To align the reference zero point of the spindle center with respect to the vertical surface Q provided on the workpiece W such as a plate, a centering probe 52 is used as shown in FIG. It is sufficient to carry out the same procedure as the reference zero point adjustment described above, except that the reference zero point is brought into proper contact with the vertical surface Q of the workpiece W.

As mentioned above, in this embodiment, the reference zero point alignment of the spindle center can be performed very quickly and easily by simply moving the Rad 35 in each direction to the free-flow type spindle without moving the table 10. can.

Next, in order to drill a hole in the workpiece W, the drill chuck 40 and the drill blade 41 are attached to the quick change holder 39, and the digital counters 20, 21 are moved so that the drill bit 41 is positioned above the hole-drilling position of the workpiece W. It is sufficient to move the table 10 according to the display and punch a hole in the workpiece W by operating the lever 38. At this time, there is no need to move the spindle head 35. By accurately moving the table 10 in the front, rear, left and right directions, it is possible to accurately drill holes with a positional accuracy of about 1 mm, without having to scribe or punch pilot holes in the workpiece W.

When drilling a plurality of holes consecutively, it is sufficient to move the table 10 by the pitch of the holes as described above.
, a pitch accuracy of about 1 mm can be achieved.

Furthermore, by configuring the spindle head 35 as a free flow type, the following effects are achieved.

■ Regardless of whether reference zero point adjustment is required, Table 10
No matter where on the workpiece there is, the spindle head 35 can be quickly brought to the desired position for drilling.

- Since the top of the table 10 can be used fully, it is possible, for example, to perform work on both a round object mounting tool (index table) and a plate object mounting jig while both are installed on one table.

■ Even if the workpiece has a hole pitch that exceeds the movable distance of the table 10 in the front and rear and left and right directions, the table 10 and spindle head 35 can be moved again and the reference zero point can be aligned with the already machined hole, thereby eliminating markings with a single tightening. You can continue processing without it.

■ When performing reference zero point alignment, with conventional fixed spindle head types, the table was forced to move, causing the centering probe to hit too much, which could damage the probe or the workpiece. However, in this embodiment, the reference zero point adjustment can be performed while the table 10 is stopped, so the above damage does not occur.

Furthermore, this embodiment also has the following effects.

(a) Since the table 10 moves based on the sliding movement (bar slide) between the slide bushes 4 and 11 and the slide par 2.9, it is not affected by chips.

(b) The sliding surfaces of the slide bushes 4 and 11 are made of synthetic resin with low sliding resistance and excellent wear resistance, so the force required to move the table 10 is small and the durability is high. It's also expensive. Additionally, once refueled, it is maintenance-free.

(c) The amount of table movement per handle rotation is approximately 1
Since the length is increased to 0 mm, rapid movement is possible.

(d) Since the quick change holder 39 is adopted, centering probes, drill blades, taps, etc. can be easily and quickly attached and detached.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and may be modified and embodied as desired without departing from the spirit of the invention, for example, as follows.

(1) The movement mechanism of the spindle head 35 is not limited to the hydraulic mechanism described above, and may be modified by providing a gear mechanism such as a male screw (worm) and a female screw, a rack and a binion, etc. on the slide base 31, the support column 32, and the slider 34. .

(2) Regarding the movement mechanism of the table 10, it is also possible to change the gear configuration, reduction ratio, etc.

Effects of the Invention As detailed above, the present invention allows the reference zero point alignment of the spindle center to be performed very quickly and easily.
Not only is it possible to drill holes in accurate positions without marking or punching pilot holes on the workpiece, but the spindle head can be quickly moved to the desired hole position, and the hole pitch exceeds the table's movable distance. Even if the workpiece has a standard zero point, machining can be continued without scribing by simply resetting the reference zero point, and the centering probe or the workpiece will not be damaged when adjusting the reference zero point, which is an excellent effect.

[Brief explanation of drawings]

Each figure shows an embodiment embodying the present invention; FIG. 1 is a front view thereof, FIG. 2 is a right side view thereof, FIG. The figure is a sectional view of the main part showing the horizontal movement mechanism of the table, Figure 5 is a front view showing the state in which the centering probe is attached to the quick change holder, and Figure 6 is the state in which another centering probe is attached. FIG. 1... Base, 10... Table, 35... Spindle head. Patent applicant Odai Iron Works Co., Ltd. Agent
Patent Attorney On 1) Hironobu Figure 1

Claims (1)

[Claims] 1. A free-flow type spindle head (35) that can move in the front-rear, left-right, and up-down directions, and a table (10) that can move in both the front-back and left-right directions are mounted on a base (1). ) A radial drilling machine characterized by being equipped on the top. 2. The spindle head (35) is supported by a slide base (31), a column (32), a joint (33), and a slider (34) connected in order from the base (1), and the slide base (31), column The radial drilling machine according to claim 1, wherein the (32) and the slider (34) are provided with a hydraulic mechanism for moving the spindle head (35) in each of the directions. 3. Two slide bars (2) for forward and backward feeding extending in the front-rear direction are fixed on the base (1), and the top of the slide bush (4) is slidably fitted to the slide bar (2). An intermediate support plate (3) is attached to the intermediate support plate (3), and two slide bars (9) for left-right feeding extend in the left-right direction on the intermediate support plate (3).
is fixed, and the table (1) is placed on the slide bush (11) which is slidably fitted to the slide bar (9).
0) is attached to the radial drilling machine according to claim 1. 4. A screw mechanism is provided below the intermediate support plate (3) to move it in the front-back direction, and a gear mechanism is provided below the table (10) to move it in the left-right direction. The radial drilling machine according to claim 3, characterized in that: 5. The radial drilling machine according to claim 3, wherein the sliding surface of the slide bush (4, 11) against the slide bar (2, 9) is made of synthetic resin.