JPS59205209A - Spindle head used in drilling machine for printed substrate - Google Patents

Abstract

PURPOSE:To enable a drill in different length to be used further minimize its vertical stroke to a necessary limit so as to enable its drilling to be performed, by adjusting the distance between ends of the drill and a pressure foot to a prescribed length. CONSTITUTION:In the case of a spindle head controlled by numerical control or the like and used in a drilling machhine for a printed substrate a housing 6 fixes the upper part of a spindle 1 to a vertically moving device. While a screw 9 lifts or lowers a cylinder 3, piston 4 and a collar 5 together with a nut 10 in accordance with a times of its rotation. Further the collar 5, whose vertical movement is automatically adjusted, replaces the drill 5 of small and large diameters with each other in accordance with the previously programmed order, also enabling shallow and deep holes to be successively drilled. In such way, drilling work can be performed by easy operation in accordance with hole sizes of multiple kinds.

Description

[Detailed description of the invention] The present invention is directed to a burr that is controlled by numerical control or the like.

The plate hole drilling is related to the spindle head used in the machine. When drilling a thin plate such as a printed circuit board using a tool such as a drill, drill the specified hole.

It is necessary to firmly fix the thin plate (hereinafter collectively referred to as the printed circuit board) when the tool is pulled out. Conventionally,
As shown in FIG. 1, a ditril 2 is attached to the tip of a spindle 1 by a chuck 1a, and a pressure foot 14 is arranged near the tip of the drill 2 so as to be movable along the axis of the drill 2. . The pressure shaft 14 is attached to a piston 4 which is slidably fitted into a sliding portion 3a of a cylinder 3 formed coaxially with the spindle 1 on the outside of the spindle 1, and to the other end of this piston. It consists of the following colors.

A flange 3b formed at the lower end of the cylinder 3 and a flange 4a formed at the upper end of the piston 4 are engaged with each other, and the inner wall of the cylinder 3 and the outer wall of the spindle 1 are connected to the flange portion of the piston 4. .

A fluid passageway 16 is provided in the thione bar 15 formed by the
.

A constant pressure is compressed through a pneumatic source (not shown).

Supplied with air.

The cylinder 3 is attached to a vertical movement device (not shown).

and is fixed to the base 1'7I: below the drill 3.

The printed circuit board 18 is lowered or raised toward the printed circuit board 18.

Ru.

When drilling a hole in the printed circuit board 18, the spindle 1 descends together with the cylinder 3, and the protrusion 5a formed below the collar 5 first contacts the printed circuit board 18 and pushes the printed circuit board 18 onto the base 17. This prevents it from rising. When the spindle 1 further descends, the cylinder 3 and piston 4 are separated from each other by the flange portion 3b and the flange portion 4.
a is separated, and the flange portion 4a is attached to the inner wall 3a of the cylinder 3.
The volume of the chamber 15 is reduced while sliding. When the tip 2a of the drill 2 protrudes from the lower end of the collar 5, a hole of a predetermined depth is drilled in the printed circuit board 18, and then the spindle 1 returns to its original position (raises). As spindle 1 rises, Chang.

After the volume of the bar 15 increases and the drill 2 is pulled out from the printed circuit board 10, the collar 5 is pulled up.

It will be done.

The diameter of the processing drill 2 is determined by the size of the hole drilled in the printed circuit board 18, but Q, Q5In! ng
.

~6.35 a g has been put into practical use. Drill,.

There are various lengths of the drill 2 depending on the diameter of the drill 2. In the conventional spindle head mentioned above, the dimension from the lower end of the chuck 1a to the lower end of the protrusion 5a of the collar 5 is constant; 2. If the value changes, the depth of the hole that can be machined will be limited. .

there were. In addition, if the drill 2 is short, the idle cutting time (distance) until the tip of the drill 2 comes into contact with the printed circuit board 18 will be longer, so there will be a limit when drilling at high speed. There was that.

In addition, the depth of the hole to be drilled varies depending on the diameter of the drill.
Specifically, it is about 0.29 to 1.6 u.

Thus, for example, using a drill of 0.05 mmg.

To drill a hole with a depth of 0.2 mm, the spindle is moved 1.
.

Giving involves a lot of wasted time.

The present invention eliminates the above-mentioned drawbacks of the prior art and reduces the distance between the drill tip and the presser foot tip.

It is possible to use drills of different lengths by adjusting the length to a predetermined length, and the drill can be drilled with a minimum vertical stroke of 1°.

Drilling holes in printed circuit boards, which improves productivity, is the main axis of the machine.

It's the head.

Embodiments of the present invention will be described and explained in detail below using the drawings.

Fig. 2 shows a 4°, 3 for printed circuit board according to the present invention.

This is a vertical cross-sectional view showing one embodiment of the spindle head.
Parts that are the same as those in the figure are given the same reference numerals. A housing 6 fixes the upper part of the spindle 1 to a vertical movement device (not shown). Reference numeral 7 denotes an L-shaped bracket attached to one end of the housing 6, to which a screw 9 parallel to the axis of the spindle 1 and a motor 8 for rotating the screw 9 are attached. Reference numeral 10 denotes an L-shaped bracket provided protruding from the outside of the cylinder 3, and the part interfering with the screw 9° is a nut with a thread formed therein.

Cylinder 3 can slide on the outer wall of spindle 1.

combined. Depending on the number of rotations of screw 9.

Cylinder 3, piston 4, force along with synat 10.

The roller 5 is pulled up or pulled down.

Therefore, in the case of a small diameter drill, that is, a short drill, 1. .

is the dimension t from the tip of the chuck to the bottom edge of the collar.

In the case of a short and large diameter drill, that is, a long drill, the dimension t can be shortened. Also,.

Instead of the motor 8, the screw 9 may be rotated by a manual handle, and the screw 9 may be rotated by 5.4 degrees.

The shaft is attached to the nut 10 by a cam device.

It is also possible to adjust the vertical movement of the collar 5. .

Furthermore, by automatically adjusting the vertical movement of the collar 5, the diameters of small diameter drills and large diameter drills can be adjusted to the same size.

Shallow holes and deep holes can also be machined one after the other by changing according to the programmed order. Furthermore, if the diameter of the drill is detected using a chuck section or the like, the vertical movement of the collar 5 can be automatically adjusted.

FIG. 3 shows another embodiment of the present invention, in which the same parts as in the previous I+· are given the same reference numerals. 11 forms a flange 4a at one end thereof, which engages with the cylinder 3.

Remove the inner wall at the other end between it and the outer wall of spindle 1.

The first piston has a cylindrical gap 19 formed therein.

It is. 12 is the piston 11 of fang 1 and the spindle 11-
.

It is slidably provided in the gap 19 formed in the gap.

This is the ninth piston. and a first piston 11.

At a corresponding position on the outside of the second piston 12 is a plug.

Rackets 7 and 10 protrude from one bracket.

7 is provided with a motor 8 and a screw 9, and 11. .

The other bracket 10 is provided with a thread corresponding to the screw 9. When the motor 8 is rotated, the screw 9. Since the collar 5 is pulled up or pulled down via the second piston 12 of the bracket 10,
From the tip of the chuck to the bottom of the collar, depending on the thickness or length of the drill.

The dimension t can be adjusted.

FIG. 4 shows still another embodiment of the present invention.

In FIG. 3, the second piston is constructed integrally with the collar 5, and a bracket 10 is formed on the collar 5 at an angle of 11 degrees.

FIG. 5 shows still another embodiment of the present invention.

It is slidably assembled with the piston 4 below the stone 4.

A rounded tip bushing 13 is provided to attach the piston 4.

A bracket 7 is provided at one end, and a motor 8 and a screw 9 are attached to this bracket 71-1. A bracket 10 is provided at one end of the tip bush 13, and a female thread is formed in this bracket 10 to correspond to the screw 9. There is. Therefore, when the motor 8 is driven, the screw 9
rotates, and the tip bushing 13 is pulled up or down via the bracket 10, so that the dimension t from the tip of the chuck 1a to the bottom end of the tip bushing 13 can be adjusted depending on the thickness or length of the drill. can.

Figures 2 and 6 show still another embodiment of the invention, in which the cylinder 3
An inverted-shaped bracket 20 fixed to the spindle 1 is provided so as to extend above the spindle 1.
A motor 8 and a screw 9 are attached to the holder. An inverted U-shaped bracket 10 is provided at the upper end of the spindle 1, and the middle of the bracket 10 at 111 corresponds to the screw 9.

A female thread is formed. Hence the motor.

8 is driven, screw 9. The spindle 1 is pulled up or down via the bracket 10°.

Therefore, the 1-dimension between the tip of the chuck 1a and the lower end of the collar 5 can be adjusted.

Motor 8 and screw 9 in the above embodiment of the present invention
This includes, but is not limited to, motors and belts.

Motor and chain, motor and rack, pinion.

Cylinder, solenoid, rotary linenoid, etc. 7.

can be replaced with a combination of In other words, it is possible to appropriately adopt other mechanisms such as adjusting the distance t between the spindle and the collar or tip bushing in accordance with the length of the drill.

Although the chamber 15 is formed on the outer periphery of the spindle 1, the present invention is not limited to this, and a similar main and shaft center may be provided by providing one or more air cylinders separately from the spindle 1 along the axis of the spindle 1. The head can be configured.

As described above, the present invention provides a spindle tip 1. .

The drill attached to the section and the axial direction of this drill.

A pretschaf formed to be movable relative to the .

and this pressure foot with the above drill.

Print with a device and a device that adjusts the relative movement distance of the print.

Since board hole drilling relies on the machine spindle, the protrusion dimension of the drill can be adjusted according to the length and width of the drill, making it possible to drill holes for a wide variety of hole diameters with simple operations. can. Furthermore, the length of the drill, which is related to the thickness of the drill, is determined by detecting the thickness of the drill and automatically adjusting the protrusion of the drill according to the length of the drill.

Since the extension dimensions can be adjusted, program operations can be easily performed.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of a spindle head for a conventional printed circuit board with holes, Fig. 2 is a longitudinal cross-sectional view of an embodiment of the present invention, and Fig. 3 is a longitudinal cross-sectional view of another embodiment of the present invention. 4 to 6 are longitudinal sectional views showing still other embodiments of the present invention. 1 Niji spindle, 2 Nitrile, 3 Nijilinda,
4: Piston, 5: Collar, 6: C1. . Uzing, 7: Bracket, 8: Motor. 9: screw, 10 nib bracket, 11: bi. Stones 2 and 12: Pistons 1 and 13: Tips. Shu.

Claims (1)

[Claims] A drill attached to the tip of a spindle, a pressure foot formed to be relatively movable in the axial direction of the drill, and an adjustment for adjusting the relative movement distance between the pressure foot and the drill. A printing base comprising a device. The plate hole is the machine spindle head.