JP2835584B2 - Workpiece counterboring machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing material for a printed circuit board, a clock board, an IC package, etc.
Say The present invention relates to a work counterboring machine used for performing a plurality of recessed counterbores of the same depth on the surface of (1).

[0002]

2. Description of the Related Art Conventionally, as one example of this kind, there is Japanese Utility Model Publication No.
There is one described in JP-A 1-16027. The purpose of this embodiment is to increase the centering property of the workpiece holder, and as shown in FIG. 11, a housing (vertical moving member) 60 of a work counterboring machine and a vertical slide in the housing 60 are provided. A spindle 61 movably supported, a tool (counterbore cutter) 62 rotatably held by the spindle 61 and processing a workpiece, and a lower wall surface 64 of a cylinder 63 fixed to a lower end surface of the housing 60 , A piece (pressure foot) 66 fixed to the lower end face of the piston 65, and a plurality of springs 67 slidably provided on the lower end face of the piece 66. And a workpiece presser piece (presser bush) 68 connected to the piece 66 through the intermediate portion.

[0003] In the above configuration, the workpiece pressing piece (pressing bush) 68 during processing is fixed by the frictional force generated between the processed product and the press ring 68a of the pressing bush 68. Even if the pressure foot 66 moves in the horizontal direction, it remains at the processing position. When the holding bush 68 separates from the work material, the holding bush 68
7 moves to the center of the pressure foot 66 by the spring force of 7, and returns to the same center position as the tool (counterbore cutter) 62.

[0004] However, in the above configuration, although the centering property of the holding bush 68 can be improved, the holding bush 68 includes a plurality of springs,
Pressure foot 66 via a plurality of mounting bolts
Since it must be mounted directly on the surface, the mounting is troublesome, and the use of a spring has a problem in durability. Further, when forming a large number of concave counterbores, the starting point of depth processing is required. When an acoustic emission (hereinafter, referred to as “AE”) generated when the tool tip hits a work material is detected as a signal, AE is also generated from a spring mounting portion. AE cannot be detected accurately, and therefore, it is difficult to accurately specify the value of the counterbore depth from the upper surface of the work material on the NC control operation panel. .

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, the present invention makes it possible to attain the centering property of the holding bush without using a spring or a mounting bolt. Attaching the holding bush to the foot is easy, and the AE generated when the tool tip hits the workpiece next time is changed from the AE generated from other members.
In the case where a large number of recessed counterbores are machined and formed without being disturbed by E, the NC control operation panel receives the counterbore depth from the upper surface of the work material as a depth machining start point signal. An object of the present invention is to obtain a work material counterbore capable of accurately specifying a numerical value.

[0006]

A work counterboring machine according to the present invention comprises a horizontal slide plate provided on the upper surface of a lower support and horizontally moved in the X-axis direction by the driving force of an X-axis servomotor. A work material setting table plate provided on the upper surface of the horizontal slide plate and horizontally moved in the Y-axis direction by the driving force of the Y-axis servo motor; and a Z-axis servo device provided on the front surface of the upper support table. A vertical moving member that moves vertically in the Z-axis direction by a driving force of a motor; a main shaft provided on the vertical moving member; and a work material rotatably supported by the main shaft and driven by a motor built in the main shaft. A plurality of replaceable drills for drilling a set, and a control device electrically connected to the servomotors of the respective axes and controlling the rotation of the respective servomotors. Can be moved up and down A pressure foot is provided, and a support member that forms a chamber with a sliding plate and a support plate is fixedly provided on the lower surface of the pressure foot, and is attracted in accordance with the polarities of a plurality of magnetic substances provided on the support plate. A centering plate having an AE sensor is movably provided on an arm protruding from a notch of the supporting member, the centering of the centering plate. The hole is provided with a holding bush.

[0007]

When the pressure foot and the supporting member are lowered, the pressing ring of the holding bush first arrives at a predetermined surface of the work material, and then when the pressing force is further applied to the holding bush, the slide pad is moved to the centering plate by the supporting member. Up until it comes into contact with the inner wall surface of the sliding plate. At this time, the first magnetic body on the support plate side and the second magnetic body on the core-center plate side are separated.
Then, when the spindle descends and the tool hits the surface of the work material, AE generated at that time is detected by the AE sensor via the holding bush.

When the counterbore machining is started and the horizontal sliding plate is moved by the X-axis servomotor and the table plate is moved by the Y-axis servomotor in the horizontal direction (front and rear, left and right), FIG. As shown in FIG. 8, the centering plate moves with the work material and the table plate due to frictional resistance with the work material. At this time, the centering plate slides inside the support member via the slide pad, while rotating while stopping at the position of the tool 16 on the pressure foot side. At this time, the annular contact portion of the centering plate is always in the chamber of the support member.

When the pressure foot rises, even if the center position of the center hole of the holding bush and the center position of the center hole of the pressure foot are misaligned, the centering plate is attracted to the plurality of magnetic members on the support member side. Then, it returns to the center of the center hole of the pressure foot.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows an entire work material counterbore machine used for forming a large number of recessed counterbores having the same depth on the surface of a work material such as a printed circuit board, a clock board, an IC package, or the like. Show. First, 1 is a lower support, 2 is an upper support mounted on the rear upper surface of the lower support 1, and 3 is a pair of front-rear first guide rails provided in parallel with the upper surface of the lower support 1. 4 and 4 are horizontal sliding plates guided.

The horizontal sliding plate 3 is an X-axis servo motor 5
The first driving force provided on the upper surface of the lower support base 1 by the driving force of
It horizontally moves in the X-axis (front-back) direction via the screw rod 6 (ball screw).

Reference numeral 7 designates a work material setting table plate guided by a pair of second guide rails 8, 8 provided in parallel with the upper surface of the horizontal slide plate 3. The table plate 7 is driven by a driving force of a Y-axis servomotor 9 fixedly provided at one end (the right side in FIG. 1) of the horizontal sliding plate 3.
It horizontally moves in the Y-axis (lateral) direction crossing the X-axis via the second horizontal screw rod 10. The second screw rod 10 is appropriately supported on the horizontal slide plate 3 so as to be located between the second guide rails 8. Therefore, the first guide rails 4, 4 and the second guide rails 8, 8 and the first screw rod 6 and the second screw rod 10 are arranged so as to cross each other.

Reference numeral 11 denotes a vertical moving member (spindle saddle) which is guided by a pair of third guide rails 12, 12 provided on the front surface 2a of the upper support 2 in the vertical direction. Usually, two or more vertical moving members 11 are provided, and vertically move in the Z-axis (longitudinal) direction via the third screw 14 by the driving force of the Z-axis servo motor 13.

Reference numeral 15 denotes a main shaft (spindle) provided on the vertical moving member 11. A motor is built in the main shaft 15, and the driving force of the motor causes a tool (counterbore cutter) 16 shown in FIG. 2 to rotate at high speed.

Reference numeral 17 denotes a work material such as a printed board, a watch board, an IC package, or the like. This work material 17 is directly fixed on the upper surface of the table plate 7 via the reference pin 51. A spare or replacement cutter group 52 having a different diameter is arranged on the table plate 7 via a tool post group 53. Reference numeral 18 denotes a control device that controls the rotation of each of the X-axis servomotor 4, the Y-axis servomotor 7, the Z-axis servomotor 10, and the main shaft 12.

FIGS. 2 to 8 show an embodiment of a main part of the present invention. As described above, 11 is a vertical moving member that moves in the Z-axis direction, 15 is a spindle that is provided on the vertical moving member 11 so as to be able to move up and down, and 16 is a tool that is rotatably held by the spindle 15. It is.

Reference numeral 19 denotes a pair of vertical air cylinders provided on the upper surface of the vertical moving member 11 in the left and right directions. The operating rods 19a of these air cylinders 19 pass through the vertical moving member 11.

Reference numeral 20 denotes a pressure foot fixedly attached to the protruding end of the operating rod 19a of the air cylinder 19. The pressure foot 20 is a hat-shaped steel cross section, and has a large-diameter guide fitting hole 20a into which the lower end of the spindle 15 is fitted, and a guide fitting hole 20a at the center.
And a small-diameter center hole 20b communicating therewith.

A suction hole 20c for sucking chips generated from the work material 17 at the time of machining is formed at an appropriate position on the peripheral body of the pressure foot 20.
A dust hose 21 connected to a dust collector (not shown) is appropriately attached to c.

Reference numeral 22 denotes an annular support member fixedly provided on the lower surface of the pressure foot 20. In this embodiment, the support member 22 is fixed to the lower surface of the pressure foot 20 and has a channel-shaped slide plate 23, and is fixed to the slide plate 23 on the lower side to form a required space or chamber 24. And a support plate 25 having a channel shape in cross section.

The peripheral walls 23a and 25a of the sliding plate 23 and the supporting plate 25 are provided with a total of four notches 26 for forming windows at required locations as shown in FIG. A center hole 27 corresponding to the center hole 20b of the pressure foot 20 is formed at the center of the slide plate 23 located above the support member 22, while the support plate 25 located below the center hole 27 has an annular shape. A large-diameter hole 28 that forms the horizontal support wall 25b is formed. In the annular horizontal support wall 25b, a plurality of magnetic bodies 29 are buried at predetermined intervals, in this embodiment, a total of three magnetic bodies 29 are buried.

Reference numeral 30 denotes a core-centering plate movably supported by the support member 22 and having a plurality of second magnetic members 31 that are attracted in accordance with the polarity of the magnetic member 29. The centering plate 30 has a center hole 32 slightly larger in diameter than the center hole 20b of the pressure foot,
The inner wall surface 2 of the sliding plate 23 accommodated in the room 24
3b, an annular contact portion 34 having a plurality of slide pads 33 slidingly in contact with it, and a total of three protrusions 3 projecting from the annular contact portion 34 and having the second magnetic body 31 on the lower surface.
5 and one of these projections 35 is a window-shaped notch 2
6 and an arm portion 36 extending from the annular contact portion 34 so as to protrude from one of them.

A pressing bush 38 having a pressing ring 37 on the lower surface is formed in the center hole 32 of the centering plate 30.
Is fixedly fitted, and the tip of the tool 16 at the time of machining is
AE that is directly detected through the holding bush 38 and the support member 22 integral with the AE generated when the AE strikes
A sensor 40 is provided.

The pressing ring 37 is provided with a groove 39 for inflow of air so that the chips can be easily sucked when the chips are sucked on the pressure foot 20 side. The holding bush 38 is detachably provided by a fixing tool 41 as shown in FIG.

In the above configuration, when the Z-axis servo motor 13 is driven to lower the vertical moving member 11, and when the operating rod 19a of the air cylinder 19 is extended and the pressure foot 20 and the supporting member 22 are lowered. As shown in FIG. 6, first, the pressing ring 37 of the pressing bush 38 arrives at a predetermined surface of the work material 17, and then the pressing bush 3
When the pressing force is further applied to 8, the centering plate 30 rises until the slide pad 33 contacts the inner wall surface 23b of the slide plate 23 of the support member. At this time, the first magnetic body 29 on the supporting plate 25 side and the second magnetic body 31 on the core-centering plate 30 side are separated.
Then, when the spindle 15 descends and the tool 16 hits the surface of the workpiece 17, the AE generated at that time is detected by the AE sensor via the holding bush 38.

The counterbore machining is started, and the horizontal sliding plate 3 is now temporarily moved by the X-axis servomotor 5 and the table plate 7 is moved by the Y-axis servomotor 9 in the horizontal direction (front and rear, left and right). When moved, the centering plate 30 moves together with the work material 17 and the table plate 7 due to frictional resistance with the work material 17 as shown in FIGS. At this time, while the centering plate 30 slides in the room 24 of the support member 22 via the slide pad 33, the centering plate 30 rotates while stopping at the position of the tool 16 as it is. At this time, the centering plate 30
Is always in the chamber 24 of the support member 22.

Then, if the pressure foot 20 rises and the center position of the center hole of the presser bush 38 is shifted from that of the center hole 20b of the pressure foot 20, the centering plate 30 will The magnetic material 29 is attracted to each of the magnetic bodies 29 and returns to the center of the center hole 20b of the pressure foot 20, as shown in FIG.

[0029]

Next, FIGS. 9 and 10 show a second embodiment of the present invention. In the description of this embodiment, the same parts as those of the embodiment of the present invention are denoted by the same reference numerals, and overlapping description will be omitted.

The second embodiment differs from the first embodiment mainly in the pressing bush 38A and the pressing ring 37A.

That is, the diameter of the tool center holes 51 and 52 of the pressing bush 38A and the pressing ring 37A is determined by the center hole 20b of the pressure foot 20A or the supporting member 2.
The point is that it is formed smaller than that of the center hole 27 of the sliding plate 23 of 2A.

With this configuration, the holding bush 3
With 8A and the pressing ring 37A, it is possible to press the work 16A closer to the periphery of the recess of the work material formed by spotting.

[0033]

As is apparent from the above description, in the present invention, a support member fixedly provided on the lower surface of the pressure foot and forming a chamber with the sliding plate and the support plate is provided.
An arm portion that has a second magnetic body that is attracted in accordance with the polarity of a plurality of magnetic bodies provided on the support plate of the support member in the annular contact portion, and that protrudes from the notch of the support member; And a holding bush attached to the center hole of the centering plate.
The centering of the holding bush can be achieved without using mounting bolts or the like. The holding bush may be fitted into the center hole of the centering plate, so that the mounting is simple.

The AE generated when the tool tip hits the workpiece can be accurately detected without being disturbed by the AE generated from other members. Therefore, when forming a large number of concave counterbores, a work material that can accurately specify the value of the counterbore depth from the upper surface of the work material on the NC control operation panel as a starting point signal of the depth processing. You can get a spotting machine.

[0035]

[Brief description of the drawings]

1 to 8 show a first embodiment of the present invention, and FIGS.
Is a second embodiment of the present invention.

[0036]

FIG. 1 is a perspective view showing the entire apparatus of a first embodiment.

[0037]

FIG. 2 is a schematic explanatory view showing a state in which a vertical moving member is separated from a work material.

[0038]

FIG. 3 is an explanatory view of a main part (a support member 22 and a centering plate 30).

[0039]

FIG. 4 is a schematic cross-sectional explanatory view of a main part (particularly showing a position of an AE sensor).

[0040]

FIG. 5 is a schematic sectional explanatory view of a main part.

[0041]

FIG. 6 is a schematic sectional explanatory view of a main part.

[0042]

FIG. 7 is an explanatory diagram of a main part (relationship between a support member 22 and a centering plate 30).

[0043]

FIG. 8 is an explanatory diagram of an operating state.

[0044]

FIG. 9 is a schematic sectional explanatory view of a main part of the second embodiment.

[0045]

FIG. 10 is a schematic sectional explanatory view of a main part of a second embodiment.

[0046]

FIG. 11 is a schematic explanatory view showing a conventional example.

[0047]

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lower support stand, 2 ... Upper support stand, 3 ... Horizontal moving plate, 5
... Servo motor for X axis, 7 ... Table plate, 9 ... Servo motor for Y axis, 11 ... Vertical moving member, 13 ... Servo motor for Z axis, 15 ... Spindle, 16, 16A ... Drill, 17 ... Machining material, 20, 20A ... pressure foot, 22, 22A ... support member, 23 ... sliding plate, 24 ...
Chamber, 25: Support plate, 26: Notch, 29, 31: Magnetic body, 30: Centering plate, 36: Arm, 37, 37A: Pressing ring, 38, 38A: Pressing bush 40: AE
sensor.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Teruo Iwasaki 667-66, Fukaya-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Yoshikazu Nakazawa 117-Mansaka Homaki, Naka-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Shin Maeno, Kanagawa (38) Inventor Shuhei Shimizu 68-31, Kodai, Minami-ku, Yokohama-shi, Kanagawa, Japan (56) References Real public 1986-16027 (JP, Y2) (58) Survey Field (Int.Cl. ⁶ , DB name) B23B 47/28 B23B 49/00 B23C 3/00 B23Q 17/09

Claims (4)

(57) [Claims] 1. A horizontal sliding plate provided on an upper surface of a lower support base and horizontally moved in the X-axis direction by a driving force of a servomotor for the X-axis; A work material setting table plate horizontally moved in the Y-axis direction by the driving force of the servomotor, and a vertical moving member provided on the front surface of the upper support table and vertically moved in the Z-axis direction by the driving force of the Z-axis servomotor A spindle provided on the vertical moving member, and a plurality of replaceable drills rotatably supported on the spindle and drilling a work material set by a driving force of a motor built in the spindle, and A control device that is electrically connected to the servomotors of each axis, and controls the rotation of each servomotor. The vertical movement member is provided with a pressure foot that can be moved up and down through a cylinder. A support member for forming a chamber with a sliding plate and a support plate is fixedly provided on the lower surface of the foot, and a second magnetic body that is attracted in accordance with the polarity of the plurality of magnetic bodies provided on the support plate is provided. A centering plate having an AE sensor is movably provided on the supporting member in an arm portion having an annular contact portion and protruding from a notch of the supporting member, and a holding bush is attached to a center hole of the centering plate. Workpiece counterbore machine characterized by being done. 2. The work material seat according to claim 1, wherein a plurality of slide pads are provided on an upper surface of the core-centering plate so as to be in sliding contact with an inner wall surface of the slide plate of the support member. Boring machine. 3. The machine according to claim 1, wherein the diameter of the center hole for the tool of the holding bush and the pressing ring is smaller than the center hole of the pressure foot. 4. The work counterbore according to claim 1, wherein the diameter of the tool center hole of the holding bush and the pressing ring is smaller than the center hole of the sliding plate of the support member. Machine.