JPS59196104A - Spindle head of drilling machine - Google Patents

Abstract

PURPOSE:To enable a spindle head to easily correspond to a product for its model change, by changing the arranged position of each spindle within a plane x, y. CONSTITUTION:Ball threads 15a, 15b, 15c, 15d, being turned by driving x-axis motion driving power sources 13a, 13b, 13c, 13d, cause x-axis slide bases 11a, 11b, 11c, 11d to move in the direction of an x-axis along x-axis slide bars 121, 122, 123, 124. Further ball threads 19b, 19c, turned by driving y-axis motion driving power sources 17ab, 17cd, cause y-axis slide bases 14b, 14d, 14a, 14c to move in the direction of a y-axis along y-axis slide bars 16bd, 16ac, thus the arrangement of a position of each spindle 10a, 10b, 10c, 10d is changed within a plane x, y corresponding to a product for its model change.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a CNC drilling machine mechanism, and in particular to the structure of its multi-axis spindle head.

Usually, in a special-purpose drilling machine used in the automobile industry, etc., the gearing head (single-axis or multi-axis spindle head that holds a cutting tool) differs depending on the product model. For example, the gearing head of a drilling machine used to process crankcases is either made new or undergoes major modifications every time a product model changes.

In addition, in such a dedicated processing machine, it takes a long time to replace and install the gearing head, which is one of the factors that increases the cost of the product.

Furthermore, although the manufacturing cost of the gigang head is high, the life cycle of products has become shorter in recent years, so the investment amount for manufacturing the gigang head is enormous. And this is an amount that cannot be ignored in terms of product manufacturing costs.

In order to easily cope with model changes of products, the present invention has the following features:
The purpose is to propose a CNC drilling machine mechanism that can change the arrangement of each spindle of a multi-axis spindle head.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A conventional drilling machine as a dedicated machine and a multi-spindle head according to the present invention will be described below with reference to the drawings.

FIG. 1 is a conceptual perspective view of an example of a conventional drilling machine as a special-purpose machine.

This dedicated processing machine has a slide guide 2 on the top surface of a bed 1 of the processing machine, and a sliding part 3 that is slidably placed on top of the slide guide 2. A spindle drive part 5 driven by a motor 4 is attached to this. A multi-axis spindle head 6 (guyang head) is attached to the spindle drive unit 5. The arrangement of each spindle 7 in the multi-axis spindle head 6 differs for each multi-axis spindle head corresponding to the product model. Processing workpiece 9 attached to jig 8 (
For example, ball machining on a crankcase is performed by moving the spindle head 6 in the Z-axis direction along a slide guide.

In this case, the arrangement of the spindle 7 is fixed for the two orthogonal axes (x-axis, y-axis) that are perpendicular to the two axes, so in this type of gearing head, the entire gearing head can be replaced in response to model changes. There must be.

The spindle head of the present invention has two perpendicular axes (x-axis, y-axis,
It has the structure shown in FIG. 2 so that the arrangement of the spindle can be changed in the axial plane.

FIG. 2 is a conceptual partial sectional front view of the spindle head of the present invention viewed from the (x, y) plane.

Here, the coordinate system is the same as in FIG.

That is, each spindle has two axes, and by moving the spindle head in the Z-axis direction U, the workpiece 9 is machined. Then, two orthogonal axes (x
The position of each spindle can be varied along the y-axis, y-axis). In FIG. 2, the x-axis is perpendicular to the plane of the paper, and the x- and y-axes are directions indicated by arrows.

The structure of the spindle head shown in FIG. 2 is as follows. That is, four spindles 10a, 10b, 10c, 10d are arranged parallel to the two axes (perpendicular to the plane of the paper K) to form four X-axis slide spaces lla, llb, lc.
, mounted on the lid. Each spindle independently has a rotational driving force source (motor) (not shown). The above X-axis slide base lla, llb.

11c, lid is X-axis slide par 12. , 12.
, 123.12. It is formed so that it can be moved along (
For example, it has a structure in which two parallel X-axis sliders 12 slidably penetrate the slide base).

Furthermore, in order to move the X-axis slide base along the slider, each X-axis slide base is independently driven by a drive power source for X-axis movement (for example, a pulse motor).
It has 13a, 13b, 13c, and 13d. The driving force sources for each X-axis movement are mounted on the y-axis slide bases 14a, 14b, 14c, and 14d, respectively (the above-mentioned X-axis sliders 12., 12. are 14a).

between 14b and 12. , 12. (bridge between 14c and 14d) ball screws 15a and 15b, respectively.
, 15c and 15d are connected to the X-axis slide base.

Note that it is preferable that each X-axis movement drive source and each X@slide pace be connected as shown in the previous two figures.

That is, for example, the ball screw 15a that connects the X-axis movement driving force source 13a and the X-axis slide base lla connects the X-axis slide base 14a and the X-axis slide base lla.
It does not screw together with b, but simply penetrates through them, and screws only with xs slide base lla. Similarly, 15b connecting 13b and Ilb does not screw into 14b and 11b, but simply passes through them, and screws only into Ilb. When connected in this way, X@slide bases lla and Ilb are
The entire range between the shaft slide bases 14a44b can be moved.

The X-axis slide bases 14a, 14b, 14c, and 14d to which the driving force source for X-axis movement is attached are y
16ac and 16bdK. (For example, the y-axis slide bar is
Slideably passes through the shaft slide base. ) and the X-axis slide bases 14a and 14b as a pair, and the y-axis slide bases 16ac and 16b as a pair, and 14c and 14d as a pair.
To move along d, each pair is independent Ky
Drive power source for X-axis movement (e.g. pulse motor) 17ab
, has 17 cd.

The drive power sources 17ab and 17cd for X-axis movement are attached to a two-axis slide base 18. Here, the Z-axis slide base 8 is connected to the y-axis slide base 16.
It is a rectangular frame whose two sides in the y-axis direction are ac and 16bd. The driving force source 17ab for y-axis movement is connected to the X-axis slide base 13b, and the driving force source 17cd is connected to 13c via ball screws 19b and 19c, respectively. The ball screws 19b and 19c are bridged between sides parallel to the X-axis of the two-axis slide base 18 in parallel with the Y-axis sliders 16ac and 16bd, and
b is screwed only with the y-axis slide base 13b, and 19c is 1
Screws only with 3c.

When the ball screw 19b is rotationally driven by the rotational drive of 1.7ab, 13b and 13g move as a pair in the y-axis direction along the y#I slide pars 16bd and 16acK, respectively. The same applies to 13c and 13d. Since the X-axis slide base can move over the entire length of the Y-axis slide pars 16bd and 16ac, it is preferable that the driving force source for X-axis movement and the X-axis slide base be arranged as shown in FIG. That is, the driving force source 17cd for y-axis movement is the X-axis slide base 13a, 1
Among 3c, screw together the farthest one (13c) and the closest one (1
There is no bond with 3a).

Since the spindle head of the present invention has such a structure, the y-axis slide par 16bd.

16ac [along the y-axis slide bay y, 14 b,
14d, 14a.

14c can move in the y-axis direction, and the X-axis slide base 11a along the X-axis slide par 12.

11b, llc, and lid can move in the X-axis direction. That is, each spindle 10a in the X and y planes.

10b, ioc, 10d f7) arrangement can be changed.

The two-axis slide base 18 is held so as to be slidable along a z-axis slide bar parallel to the two axes, and is moved in two-axis directions by rotation of a ball screw 210 screwed into the two-axis slide base 18. In order to move close to and away from the workpiece 9 fixed to the holder 8, the ball screw 21 has an independent two-axis drive power source (not shown) for rotationally driving it.

Since the spindle head of the present invention has the above-described structure, the arrangement of the spindle can be easily changed in response to a model change of the product. Moreover, the effect of shortening the setup time when changing a workpiece is brought about.

Furthermore, in the spindle head of the present invention, since the spindles move in pairs in the y-axis direction, it is easy to drill two parallel rows of holes in a workpiece.

When the spindle head of the present invention is used, it is also possible to control the rotation angle of the ball screw using a preset human power signal and move the spindle unit to a set position (for each process). Therefore, with the spindle head of FIG. 1, it is difficult to drill holes when the distance between the holes is very short, but with the spindle head of the present invention, the process can be performed in two steps.
It is also possible to drill holes independently of the distance between the holes by dividing the hole into several times.

Note that it is naturally possible to provide a function of self-determination using a microprocessor so that the spindles do not interfere with each other (mechanical collision or contact).

Since the spindle head of this drilling machine has a relatively simple structure, the price is also lower than that of a CNC drilling machine.

■7 Therefore, it is useful not only in the automobile industry but also in processing plants that produce a wide variety of products in small quantities.

[Brief explanation of the drawing]

FIG. 11 is a conceptual perspective view of a drilling machine having a spindle head according to the prior art, and FIG. 2 is a conceptual partial sectional front view of the spindle head according to the present invention, viewed from the (x, y) plane. 10a, 10b, 10c, 10d---・
- spindle, 11a, 1.1b, llc,
lid -x-axis slide base, 12, ,12.
, 128.124...X-axis slide bar, 1
3a, 13b, 13c, 13d--X-axis movement driving force source, 14a, 14b, 14c
, 14d - V-axis slide base, 15a, 15b
, 15c, 15d---ball screw,
16ac, 16bd...X-axis slide bar, 17 ab, 17 cd...X-axis movement driving force source, 18...Z-axis slide base, 19b
, 19c...Ball screw, 20...
...Z-axis slide bar, 21...Ball screw.

Claims (3)

[Claims] (1) It is held slidably along a two-axis slide bar parallel to the y-axis, and the two-axis
A Z-axis slide base, which is a rectangular frame that can be moved by an axial movement driving force source, and an X-axis slide bar, which is two sides of the rectangle of the two-axis slide booth, are held slidably, and the X-axis four X-axis slide bases that can be moved by an X-axis motion drive power source via ball screws parallel to the slide bars;
The above-mentioned an X-axis slide base that can be moved by an X-axis motion drive power source attached to the X-axis slide base via a ball screw parallel to the X-axis slide bar;
A spindle head for a drilling machine, comprising a spindle having an axis parallel to the axis, and a rotational driving force source for driving the spindle. (2) The spindle head for a drilling machine according to claim 1, wherein the X-axis movement driving force source and the X-axis movement driving force source are pulse motors. (3) The above-mentioned pulse motor and the above-mentioned two-axis movement driving power source. 3. A spindle head for a drilling machine according to claim 2, wherein the rotational driving force source for driving said spindle is controlled by a microprocessor.