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Printed board drilling method and printed board machining apparatus

A technology for printed circuit boards and processing equipment, which is applied in the direction of mechanically removing conductive materials, etc., can solve the problems of the actual roundness of the positioning accuracy of the processing quality, the easy breakage of the drill, and the decline of the processing efficiency, so as to improve the processing accuracy and improve the processing efficiency. The effect of processing efficiency

Inactive Publication Date: 2009-12-02
HITACHI SEIKO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the deflection z of the drill tip becomes considerably large, not only the processing quality such as the positioning accuracy of the hole and the actual roundness of the drilled hole decreases, but also the processing efficiency decreases because the drill is easily broken

Method used

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  • Printed board drilling method and printed board machining apparatus
  • Printed board drilling method and printed board machining apparatus
  • Printed board drilling method and printed board machining apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0045] Figure 1A with 1B is a front view showing the main part of the printed circuit board processing equipment of the present invention, and figure 2 is a table showing the stored record contents of the processing state data table of the present invention. Note that with Figure 5 Components with the same components and functions are denoted by the same reference numerals, and their descriptions will not be repeated here.

[0046] Such as Figure 1A with 1B As shown in , the spindle head (spindle moving device) 7 supports a first cylinder (presser foot positioning device) 8 with a second cylinder (presser foot positioning device) 25 as an intermediate piece. The pressure of the second cylinder 25 is substantially greater than the pressure of the first cylinder 8 . The stroke of the second cylinder 25 is L (here, 8 mm).

[0047] The presser foot 10 is composed of a body portion 10a and a head cover 10b, which is removably attached to the body portion 10a.

[0048] Su...

no. 2 example

[0058] Next, an example of setting the bit protrusion length A by means of a stopper (butting type position setting device) inside the spindle head will be described.

[0059] During the setting of the bit extension A by means of the stop block 20, the position of the stop block 20 has to be changed according to the specified bit extension A. FIG.

[0060] In this case, the stopper 20 may be provided to be movable in the axial direction, or a member movable in the radial direction may be provided axially in front of the end surface of the stopper 20 in the chuck. The drill extension A can be shortened by moving the movable member to position the drill, and the drill extension A can be extended by abutting the rear end of the drill against a stopper.

[0061] The invention is also applicable to conventional mandrels because by providing a drill with a short overall length, the position of the stop does not need to be changed.

no. 3 example

[0063] The following will continue to refer to image 3 with Figure 4 A third embodiment will be described, which is partially modified from the first and second embodiments described above. image 3 is a side view showing the main part of the printed circuit board processing equipment of the third embodiment of the present invention; and Figure 4 is along image 3 Sectional view taken along line B-B in middle. Note that the same elements as those in the first and second embodiments are denoted by the same reference numerals, and description thereof will not be repeated here.

[0064] The printed circuit board processing apparatus of the third embodiment has a guide mechanism (presser foot positioning device) 100 instead of the second cylinder 25 described above. In addition, the presser foot 10 is locally modified and connected to a not-shown vacuum source (suction device) via an intermediate piece connection 80 and a suction port 81 provided thereon.

[0065] The guid...

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PUM

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Abstract

The present invention provides a printed circuit board drilling method and a printed circuit board processing apparatus, which can improve, for example, positioning accuracy of holes, roundness of processed holes, etc., by minimizing the amount of deflection of the drill tip Such processing quality, and improve processing efficiency. Corresponding to the type of drill bit or the manner in which it is used, the extension length of the drill bit out of the mandrel when gripped by the mandrel is predetermined. Select a drill bit corresponding to the shape of the hole to be drilled in the printed circuit board, and cause the mandrel to clamp the drill bit so that the selected drill bit protrudes out of the mandrel by an extension length corresponding to the selected drill. Then, the movement of the mandrel relative to the printed circuit board is controlled, and the selected drill bit is rotationally driven by the mandrel to drill holes in the printed circuit board.

Description

technical field [0001] The present invention relates to a method for drilling a printed circuit board and a printed circuit board processing device for processing holes on the printed circuit board by using a drill. Background technique [0002] The dimensions of the holes drilled on the printed circuit board are required to be very precise in the depth direction. Japanese Patent No. 2559788 has disclosed a machining apparatus that calculates the distance between the head of the presser foot and the tip of the cutter before machining, and controls the feed distance of the spindle head based on the distance. This technique will be described below. [0003] Figure 5 It is a front sectional view of the main part of conventional printed circuit board processing equipment. [0004] Such as Figure 5 As shown, the printed circuit board 1 is fixed on the workbench 2 . A ring 4 surrounds and is attached to the drill bit 3 . The drill bit 3 is rotatably fixed by the spindle 6 vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K3/04
Inventor 铃木伸彦长沢胜浩
Owner HITACHI SEIKO LTD
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