JP2001353608A - Pressure foot device of drilling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a pad member from being deflected and elastically deformed by the press contact with a work, a surface of the work from being dented by the deflection and elastic press contact, and the work from being warped, and to realize the excellent drilling. SOLUTION: A drill projecting part 5 is formed in the pad member 4, an air passage 8 capable of communicating the inside in an air suction body 1 with the outside thereof is formed, and member is formed of an elastic material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure foot device of a drilling machine used for drilling a plurality of printed circuit boards, for example.

[0002]

2. Description of the Related Art Conventionally, as a pressure foot device of a drilling machine of this kind, a pressure foot device is disposed around a drill mounted on a spindle and is movable in contact with and away from a workpiece in the axial direction of the spindle. An intake main body disposed, an exhaust port connected to an air suction source and a fitting port formed in the intake main body, and a fitting surface of the intake main body having a contact surface capable of pressing and contacting a workpiece. There is known a structure in which a pad member is provided, a drill projecting portion is formed in the pad member, and an air passage that allows communication between the inside and the outside of the intake main body is formed.

In the simultaneous drilling of a plurality of printed circuit boards, the suction body is moved in the axial direction of the spindle so as to be in contact with the workpiece and the contact surface of the pad member is pressed into contact with the workpiece. When performing drilling by drilling by rotating and advancing the spindle, vibration and lifting of the printed circuit board are prevented by pressing contact of the pad member, and the inside of the suction body is passed through the air passage from the outside provided by the air suction source from the outside. It is configured such that chips are removed and cooled by an air current reaching the dust collector via the dust collector.

[0004]

However, in the case of the above-mentioned conventional structure, the suction body is moved with respect to the workpiece to bring the contact surface of the pad member into press contact with the workpiece, and the chips are removed by an air current. While performing drilling on multiple printed circuit boards, the pad member is made of metal or hard synthetic resin, so that the surface of the workpiece is pressed by the pressure contact, or the surface of the workpiece is pressed. Pressing chips present on the surface of the workpiece to create pressure scratches on the surface of the workpiece,
In addition, pressing the positioning pins for positioning the workpiece causes inadequate close contact, resulting in reduced chip removal performance due to air currents, and may result in damage to the workpiece. are doing.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem, and among the present invention, the invention described in claim 1 is arranged around a drill mounted on a spindle. An intake main body which is provided and is disposed so as to be able to contact and separate from the workpiece in the axial direction of the spindle, wherein the intake main body has an exhaust port and a fitting port connected to an air suction source. Forming and disposing a pad member having a contact surface capable of pressing and contacting the workpiece at the fitting opening of the intake body,
A pressure for a drilling machine, characterized in that the pad member is formed with a drill projecting portion, an air passage which allows communication between the inside and the outside of the suction body is formed, and the pad member is formed of an elastic body. In the foot device.

According to a second aspect of the present invention, an annular groove is formed in a fitting opening of the intake main body, and an annular projection that can be fitted in the annular groove is formed integrally with the pad member. The invention according to claim 3 is characterized in that the contact surface of the pad member is formed to have a middle-high surface shape.

[0007]

1 to 9 show an embodiment of the present invention. FIGS. 1 to 5 show a first embodiment, FIGS. 6 and 7 show a second embodiment, FIGS. 8 and 9. Is a third embodiment.

In the first embodiment shown in FIGS. 1 to 5, reference numeral 1 denotes an intake main body, which is disposed around a drill D mounted on a spindle S which is rotated by a drive mechanism (not shown) and which is not shown. An air suction source (not shown) is provided on the side surface of the suction main body 1 so as to be movable in contact with and away from a plurality of stacked printed boards as the workpieces W in the axial direction of the spindle S by the moving mechanism. And a fitting port 3 formed at the bottom.

Reference numeral 4 denotes a pad member, which is made of an elastic material such as synthetic rubber having elasticity or a soft synthetic resin. A fitting portion 6 fitted and fixed to the fitting opening portion 3 is formed, a bottom surface is formed on a contact surface 7 capable of pressing and contacting the workpiece, and the contact surface 7 is formed by connecting a bottom surface of the pad member 4 to a middle-high tapered surface. To form the shape of the middle and high surface 7a. The contact surface 7 allows the inside and outside of the intake body 1 to communicate with each other.
And a plurality of groove-shaped air passages 8 extending in a tangential direction tangent to a radius centered on the axis.

Since the first embodiment of the present invention has the above configuration, in the simultaneous drilling of a plurality of printed circuit boards as the workpiece W, as shown in FIGS.
Is lowered in the axial direction of the spindle S to contact and move with the workpiece W, and the contact surface 7 of the pad member 4 is pressed against the workpiece, and drilling is performed by the drill D by rotating the spindle S and moving forward. Processing is performed, and the press contact of the pad member 4 prevents the vibration and lifting of the printed circuit board, and at the same time, from the outside provided by the air suction source to the dust collector through the air passage 8 and the inside of the suction body 1. The chips are removed and cooled by the spiral air flow N. At this time, the pad member 4 is formed of an elastic body. Deformation, by this bending elastic pressing contact to prevent the surface of the workpiece W from being pressed and scratched, to prevent the workpiece W from being warped, and to press the chips existing on the surface of the workpiece. Also The contact surface 7 is prevented from being bent to cause a pressing scratch due to chips on the surface of the workpiece, and even if the positioning pin for positioning the workpiece is pressed, good contact is achieved, and cutting by the spiral air current is performed. The powder removal performance can be maintained, and good drilling can be performed.

In this case, since the contact surface 7 of the pad member 4 is formed to have a middle-high surface 7a, the contact surface 7a of the pad member 4 is strongly positioned near the drill D of the workpiece W. By pressing and contacting, the vibration and lifting of the workpiece W can be satisfactorily prevented, and the removal and cooling of the chips by the airflow N can be favorably performed.

The second embodiment shown in FIGS. 6 and 7 shows an alternative structure. In this case, an O-ring groove-shaped annular groove 3a is formed in the fitting opening 3 of the intake main body 1, and the elastic composite is formed. Pad member 4 made of an elastic material such as rubber or soft synthetic resin
And a half-shaped annular convex portion 4a of an O-ring which can be fitted into the annular groove portion 3a is integrally formed with the fitting portion 6 of the pad member 4.
Is formed on the middle-high seating surface 4b so that the contact surface 7 is
b, and a plurality of radially extending concave grooves 8 around the axis of the intake body 1 are formed on the seat surface 4b so that the inside and outside of the intake body 1 can communicate with each other. A through hole-shaped air passage 8 is formed in the middle part of the member 7.

In the second embodiment, the same functions and effects as those of the first embodiment can be obtained, and an O-ring groove-shaped annular groove is formed in the fitting opening 3 of the intake main body 1. 3
a is formed, and the pad member 4 is integrally formed with a half-shaped annular projection 4a of an O-ring that can be fitted into the annular groove 3a, so that the fitting opening 3 and the pad member 4 are closely fitted. Therefore, the airflow N can be satisfactorily obtained, and the chips can be removed and cooled.

The third embodiment shown in FIGS. 8 and 9 shows another structure. In this case, an annular groove 3a is formed in the fitting opening 3 of the intake main body 1, and the elastic urethane rubber, synthetic resin, or the like is used. An annular projection 4a that can be fitted into the annular groove 3a is formed integrally with the fitting portion 6 of the pad member 4 made of an elastic material, and a tapered surface 4c is formed on the peripheral edge of the bottom surface of the pad member 4 to increase the height. The contact surface 7 is formed on a middle and high surface 7b, and the contact surface 7 can communicate between the inside and the outside of the intake main body 1 to form a plurality of grooves extending radially around the axis of the intake main body 1. The air passages 8 are formed.

In the third embodiment, the same operation and effect as those of the second embodiment can be obtained.

It should be noted that the present invention is not limited to the above-described embodiment, and the intake body 1, the exhaust port 2, the fitting port 3,
The length, size, shape, structure, and the like of the pad member 4 and the like are designed to be appropriately changed.

[0017]

As described above, according to the first aspect of the present invention, at the time of simultaneous drilling of a workpiece, the suction body is moved in the axial direction of the spindle to move the workpiece. The contact surface of the pad member is pressed against the workpiece by contacting and moving, and the pressing contact of the pad member prevents vibration and lifting of the printed circuit board, and removes and cools chips by an air current generated by an air suction source. In this case, since the pad member is formed of an elastic body, the pad member is bent and elastically deformed by the pressing contact with the workpiece, and is pressed against the surface of the workpiece by the bending elastic pressing contact. It prevents scratching and warping of the workpiece, and even when pressing chips existing on the surface of the workpiece, the contact surface is bent and the pressing scratches are generated by the chips on the surface of the workpiece. In addition, even if the positioning pin for positioning the workpiece is pressed, close contact is made well, the performance of removing chips by airflow can be maintained, and good drilling can be performed. it can.

According to the second aspect of the present invention, an annular groove is formed in the fitting opening of the intake main body, and an annular projection which can be fitted in the annular groove is formed integrally with the pad member. Therefore, the fitting opening and the pad member can be closely fitted to each other, so that the airflow can be favorably obtained, and the removal and cooling of the chips can be performed. Since the contact surface of the pad member is formed to have a middle-high surface shape, the contact surface of the pad member comes into contact with the workpiece by strongly pressing the position near the drill, and the vibration of the workpiece is reduced accordingly. And lifting can be satisfactorily prevented, and swarf removal and cooling by airflow can be favorably performed.

As described above, the intended purpose can be sufficiently achieved.

[Brief description of the drawings]

FIG. 1 is a partial perspective view of a first embodiment of the present invention.

FIG. 2 is a partial perspective view of the first embodiment of the present invention.

FIG. 3 is a partial bottom view of the first embodiment of the present invention.

FIG. 4 is an overall sectional view of the first embodiment of the present invention.

FIG. 5 is a partial sectional view of a second embodiment of the present invention.

FIG. 6 is a partial bottom view of the second embodiment of the present invention.

FIG. 7 is a partial sectional view of a second embodiment of the present invention.

FIG. 8 is a partial sectional view of a third embodiment of the present invention.

FIG. 9 is a partial bottom view of the third embodiment of the present invention.

[Explanation of symbols]

 W Workpiece D Drill S Spindle 1 Intake body 2 Exhaust port 3 Fitting port 4 Pad member 5 Drill protruding port 7 Contact surface 8 Air passage

Claims (3)

[Claims] An intake body is provided around a drill mounted on a spindle, and is disposed so as to be able to contact and separate from a workpiece in an axial direction of the spindle. Forming an exhaust port and a fitting port connected to an air suction source, disposing a pad member having a contact surface capable of pressing and contacting a workpiece at the fitting port of the intake main body; A pressure foot device for a drilling machine, characterized in that a protrusion is formed, an air passage that allows communication between the inside and the outside of the intake main body is formed, and the pad member is formed of an elastic body. 2. The device according to claim 1, wherein an annular groove is formed at a fitting opening of the intake body, and an annular protrusion that can be fitted into the annular groove is formed integrally with the pad member. Drilling machine pressure foot device. 3. The pressure foot device for a drilling machine according to claim 1, wherein the contact surface of the pad member is formed in a middle-high surface shape.