JP3381696B2 - Drilling equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling device having a pressing means for pressing a work around a drilling position.

[0002]

2. Description of the Related Art As a drilling device, when a hole is formed in a work such as a printed wiring board by providing a pressing member for pressing the periphery of the drilling position of the work and forming a hole in the work with a drill. In addition, a structure is widely adopted in which the periphery of the processing position is pressed by a pressing member to prevent the deterioration of the processing position accuracy due to the slight vibration of the work. In addition, as a drilling device, a drill case in which a plurality of drills are arranged in a vertical position and arranged in a matrix is set at a predetermined position of the drilling device, and the used drill held on the drill chuck of the spindle is drilled. A new drill for the case and a drilling device that can be automatically replaced have also been proposed and put into practical use. Further, as a drilling device including the above-mentioned pressing member and configured so that a drill can be automatically replaced, a device in which an insertion hole through which a drill chuck can be inserted is formed in the pressing member has been put into practical use.

[0003]

By the way, as described above, in a hole drilling apparatus having a pressing member and capable of automatically exchanging a drill, it is necessary to form a large insertion hole through which a drill chuck can be inserted. Because there is
The position away from the drill is pressed by the pressing member,
There is a problem that the machining position accuracy is reduced due to a slight vibration of the work during drilling.

However, since the deterioration of the processing position accuracy due to such a slight vibration of the work is extremely slight, for example, a through hole having a smallest diameter of about 0.35 mm currently used in a printed wiring board is formed. In some cases, there is almost no problem. However, due to technological trends in recent years, the width of wiring formed on a single substrate is becoming narrower and the distance between lines is becoming narrower, and even for through holes such as through holes, for example, 0.2 to 0.15 mm. Since the use of extremely small through holes is being considered and it is possible that this tendency will be further promoted in the future, it is feared that the deterioration of machining position accuracy due to minute vibration of the workpiece will be a fatal defect. . Particularly, in order to improve productivity, when the through hole is formed in a state where a plurality of substrates are stacked, the accuracy of the processing position of the lower substrate is lowered by the shooting of the drill. Therefore, in order to secure sufficient processing position accuracy, it is necessary to reduce the number of substrates to be stacked, and it is conceivable that productivity will be significantly reduced.

An object of the present invention is to provide a drilling device capable of automatically improving the drilling position accuracy while making the drill automatically replaceable.

[0006]

MEANS FOR SOLVING THE PROBLEMS AND ACTION THEREOF The hole drilling apparatus according to the present invention is a first insertion hole for hole drilling having a size suitable for the drill, as a holding means for holding the periphery of the hole drilling position of the work. And a pressing member having a second insertion hole for exchanging a drill having a larger diameter than that, and having a pressing surface for pressing the work at least around the first insertion hole, and a pressing surface of the pressing member with respect to the work. comprising a pressing means for pressing, and switching means for switching a hole of the pressing member facing the drill by sliding operation of the pressing member into a first insertion hole and a second insertion hole Te, before
A housing mounted on the end of the spindle by the pressing means.
The space formed between the housing and the spindle
Connect the exhaust pipe that exhausts the air inside to the housing.
At the same time, the inside of the first insertion hole and the outside are connected to the pressing member.
By forming a communication hole through which the outside air flowing from the communication hole
Blow away the drill and chips around it into the housing
It is be one.

In this drilling device, during drilling, the first insertion hole is moved to the position facing the drill by the switching means, and in this state, the pressing surface of the pressing member is pressed against the workpiece. , A hole is formed in the work by the drill. Further, when exchanging the drill, the switching means moves the second insertion hole to a position facing the drill, and in this state, the drill chuck is moved to the second position.
The drill must be replaced by inserting it into the insertion hole.

Since the first insertion hole and the second insertion hole provided in the pressing member can be selectively moved to the position facing the drill by the switching means, the drill can be inserted through the first insertion hole as much as possible. It is configured with a small diameter so that a hole can be formed by a drill while pressing the periphery of the processing position that is as close as possible to the drilling position with the pressing surface, and the deterioration of the processing position accuracy due to minute vibration of the work can be minimized. At the same time, the second insertion hole can be configured to have a size that allows the drill chuck to be inserted loosely, and the drill can be smoothly and automatically exchanged through the second insertion hole.

Further, the housing being fitted on the end of the spindle is provided on the pressing means, since the exhaust pipe for discharging the air in the space formed between the housing and the spindle are in communication with the housing, during drilling It becomes possible to smoothly discharge the generated cutting chips to the outside. Further, to form a communication hole for communicating the outside and the first insertion hole in the press of <br/> pressing member, configured to blow off by the outside air flowing from the communicating hole swarf drill and its vicinity in housing
And, the discharge of the cutting chips can be performed more smoothly.

A guide groove for movably guiding the tip of the drill may be formed in the pressing member across the first insertion hole and the second insertion hole. According to this structure, the present invention can be applied without making a significant change in structure to the conventional drilling device having the pressing means.

It is preferable to set the hole diameter of the first insertion hole to 200 to 110% of the diameter of the largest drill used. When the diameter of the first insertion hole exceeds 200% of the diameter of the largest drill to be used, vibration of the work cannot be sufficiently prevented by the pressing member, and when it is less than 110%, during rotation of the drill. It is considered that the drill may come into contact with the inner wall surface of the first insertion hole and be damaged due to the runout of the core. Therefore, it is preferably set to 200 to 110%.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. As shown in FIG. 1, the boring machine 10 will be described. A rotary shaft, which is rotationally driven by a driving means (not shown), is rotatably mounted at the center of a substantially cylindrical spindle 11 arranged vertically. The drill 1 is detachably fixed to the lower end of the rotary shaft via a drill chuck 12, and a holding means 13 is externally mounted on the spindle 11, and a work W is provided by a holding member 30 provided on the holding means 13 (see FIG. 7). ) Is pressed to perform drilling.

The drill 1 includes a drill body 2 for drilling and a drill chuck 12 of the drilling device 10.
The shank portion 3 has a diameter larger than that of the drill body 2, and a truncated cone-shaped shoulder portion 4 is formed between the shank portion 3 and the drill body 2. There is. The drill 1 used in the present invention is basically
The printed wiring board 5 (see FIG. 7), etc., has a diameter of 0.3 to
It is preferably used for forming a very small through hole of 0.15 mm, but can be applied to a drill 1 having other sizes.

The work W as the object to be punched is not particularly limited, but in the present embodiment, as shown in FIG. 7, the printed wiring board 5 will be described as an example. When the printed wiring board 5 is to be perforated, a plurality of the printed wiring boards 5 are stacked and set on the lower plate 6, and a backing plate 7 made of an aluminum thin plate or a synthetic resin sheet is laid thereon. Drilling will be performed in this state.

As shown in FIGS. 1 to 6, the pressing means 13 has a first insertion hole 31 for drilling, which has a size suitable for the drill main body 2, and a second replacement hole 31 having a larger diameter than that.
A pressing member 30 having an insertion hole 32 and having a pressing surface 33 for pressing the work W at least around the first insertion hole 31; and a pressure contact means 14 for pressing the pressing surface 33 of the pressing member 30 against the work W. The switching means 15 is provided for switching the hole of the pressing member 30 facing the drill 1 to the first insertion hole 31 and the second insertion hole 32 by sliding the pressing member 30.

More specifically, a substantially cylindrical housing 16 is provided below the spindle 11 so as to surround the lower end of the spindle 11, and the pressing member 30 has the switching means 15 on the lower surface of the housing 16. It is slidably supported to the left and right through the spindle 11 and is vertically movable together with the housing 16 by the pressure contact means 14 to the spindle 11.

Explaining the press-contact means 14, a substantially cylindrical saddle 17 is externally fitted and fixed to the spindle 11, and a pair of left and right air cylinders 18 are provided on the upper portion of the saddle 17 with piston rods 19 directed downward. It is attached through the bracket. A support portion 20 that protrudes outward is integrally formed at a lower portion of the saddle 17 at a position corresponding to the air cylinder 18, and a guide rod 21 is vertically movably mounted on the support portion 20. The upper end of the guide rod 21 is connected to the lower end of the piston rod 19, the lower end of the guide rod 21 is connected to the bracket portion 22 of the housing 16, and the housing 16 is connected to the left and right air cylinders 18 via the guide rod 21. 1 is moved up and down to a descending position shown by a solid line and an ascending position shown by an imaginary line. As the pressure contact means 14, any structure can be adopted as long as it can support the housing 16 so as to be able to move up and down.

As shown in FIGS. 1 to 4, the housing 16 is composed of a bottomed, substantially cylindrical member fitted to the lower end of the spindle 11, and the spindle 16 is housed in the housing 16.
An exhaust space 23 is formed between the lower surface of the housing 1 and the housing 16, and an exhaust pipe 24 communicating with the exhaust space 23 is connected to a side wall of the housing 16.

The switching means 15 will be described with reference to FIGS.
As shown in FIG. 4, an opening 25 extending in the left-right direction is formed in a substantially central portion of the lower wall of the housing 16 in the front-rear direction, and a slide plate 26 is formed on the lower surface of the housing 16 so as to close the opening 25. An oval-shaped opening 27 is provided at the center of the slide plate 26, and the pressing member 30 is fixed so as to close the opening 27. The slide plate 26 is attached to the housing 16 slidably in the left-right direction via a pair of front and rear guide members 28 fixed to the lower surface of the housing 16, and the slide plate 26 is driven in the left-right direction on the front side of the housing 16. An air cylinder 29 is provided for this purpose, and as shown in FIG.
When the slide plate 26 is operated to the left end position by the air cylinder 29 and the first insertion hole 31 moves to the center line of the spindle 11, the first insertion hole 31 faces the drill 1, and as shown in FIG. Further, when the slide plate 26 is operated to the right end position and the second insertion hole 32 is arranged on the center line of the spindle 11, the second insertion hole 32 is configured to face the drill 1.

As shown in FIGS. 1 to 6, the pressing member 30 is fixed to the slide plate 26 from the lower side, and a substantially oval protruding portion 34 protruding downward is formed in the central portion of the lower surface thereof. The first insertion hole 31 is formed in the center of the right radius of the protrusion 34, and the second insertion hole 32 is formed in the center of the left radius of the protrusion 34. Holding member 3
A mortar-shaped recess 35 is formed on the right side of the upper surface of 0,
The first insertion hole 31 communicates with the lower end of the recess 35, the upper half of the first insertion hole 31 communicates with the second insertion hole 32 through the guide groove 36, and the lower end of the drill 1 has the guide groove 36. It is configured so as to be able to move between both insertion holes 31 and 32 via. The pressing member 30 and the slide plate 26 may be integrally formed, but since the pressing member 30 contacts the work W, a metal material such as a soft aluminum alloy so that the work W is not scratched or the like. It is preferable that the slide plate 2 is made of a resin material or a resin material, and since it is worn by contact with the work W, it can be easily replaced.
It is preferable that it is configured by a member different from 6.

A flat pressing surface 33 which is pressed against the work W is formed on the lower surface of the protruding portion 34, and the pressing surface 33 is pressed against the work W on the lower surface of the protruding portion 34 on the second insertion hole 32 side. In this state, three groove portions 37 that communicate the second insertion hole 32 with the outside are formed, and the outside air introduced into the housing 16 through the groove portions 37 causes the cutting chips generated during the drilling process from the exhaust pipe 24. It is configured to be discharged. A communication hole 38 that communicates with the first insertion hole 31 is formed in the projecting portion 34 on the first insertion hole 31 side.
The cutting air adhering to the drill 1 is blown off by the outside air introduced from.

However, although the pressing surface 33 is provided near the first insertion hole 31 and near the second insertion hole 32 in FIGS. 5 and 6, if it is provided near the first insertion hole 31, Second
It is not always necessary to form in the vicinity of the insertion hole 32. Further, in this case, the lower surface near the second insertion hole 32 is set higher than the pressing surface 33 near the first insertion hole 31, so that the pressing member 30 is pressed against the work W even when the pressing member 30 is pressed against the work W. 2 Since the insertion hole 32 is in a state of communicating with the outside,
It becomes possible to omit the groove portion 37. Moreover, the surface pressure of the pressing surface 33 near the first insertion hole 31 with respect to the work W can be increased, and vibration of the work W during drilling can be more effectively prevented, which is preferable.

The first insertion hole 31 has a size slightly larger than the diameter of the drill body 2, and the diameter of the first insertion hole 31 is 200 to 110% of the diameter of the largest drill body 2 used. Preferably, it is set to 140 to 120%. That is, the diameter of the drill body 2 is 200
%, The gap between the drill main body 2 and the inner surface of the first insertion hole 31 becomes too wide, and the vibration of the work W during drilling reduces the machining position accuracy. Is likely to come into contact with and damage the inner wall surface of the first insertion hole 31 due to runout during rotation of the drill body 2, and therefore it is preferably set to 200 to 110%.

The second insertion hole 32 has a size slightly larger than the outer diameter of the drill chuck 12, and when the drill 1 is replaced, the drill chuck 12 is inserted into the second insertion hole 32 so that the drill 1 is outside the housing 16. Are configured to be interchangeable.

Next, the operation of the boring machine 10 will be described. When drilling the work W,
First, as shown in FIG. 7A, the position of the pressing member 30 is switched by the switching unit 15 so that the first insertion hole 31 faces the drill 1, and the housing 16 and the pressing member 30 are pressed by the pressure contact unit 14. The spindle 11 is moved so that the drill 1 is located at a height position separated from the work W by a set distance while maintaining this state.
Also, the pressing means 13 is lowered by a lifting means (not shown).

Next, as shown in FIG. 7 (b), the pressing member 14 is moved down to the lower position side by the pressing means 14, and the pressing surface 33 of the pressing member 30 is pressed against the work W.

Next, as shown in FIG. 7C, the drill chuck 12 is lowered to project the drill 1 below the pressing member 30 through the first insertion hole 31 to form a hole in the work W. By forming and discharging the air in the housing 16 from the exhaust pipe 24, the cutting chips generated during the drilling process are discharged to the outside of the housing 16 via the exhaust pipe 24. That is, the first insertion hole 31 is set to a size that fits the drill 1 as described above, and the first insertion hole 31
Since the pressing surface 33 in the vicinity is arranged as close as possible to the machining position by the drill 1, the pressing surface 33 is used for the work W.
By holding down, it is possible to prevent the work W from vibrating during the drilling process, and prevent the accuracy of the drilled position from decreasing. Further, since it is possible to prevent the hole shooting due to the deterioration of the hole processing position accuracy, it is possible to prevent the hole processing position accuracy from being lowered as much as possible even when a plurality of printed wiring boards 5 are stacked to perform the hole drilling process. Becomes

Next, while discharging the cutting dust generated during the drilling process to the outside of the housing 16 through the exhaust pipe 24,
Contrary to the above, while the work W is being held by the holding member 30, the drill chuck 12 is raised and the drill 1 is extracted from the work W.

Next, when exchanging the drill 1, first, as shown in FIG.
The insertion hole 32 is moved to a position facing the drill 1, and the spindle 11 is moved so that the drill 1 is positioned above the drill case 40 that stocks the used drill 1. Next, as shown in FIG. 8B, the drill chuck 12 is moved downward through the second insertion hole 32 to load the used drill 1 into the loading hole 41 of the drill case 40,
Raise the drill chuck 12. Next, the spindle 11 is moved so that the drill chuck 12 is located above the drill case having the same construction as the drill case 40 in which the unused drill 1 is stocked, and the drill chuck is inserted through the second insertion hole 32. 12 is moved downward, the unused drill 1 loaded in the drill case is held by the drill chuck 12, and the drill chuck 12 is retracted,
The drill 1 will be replaced.

[0030]

According to the boring machine of the present invention,
The first and second insertion holes are formed in the pressing member, and a simple switching mechanism is provided to selectively switch the insertion holes facing the drill. Vibration of the work during machining can be effectively prevented by the pressing member, and the machining position accuracy of the hole can be significantly improved.

Further, the housing being fitted on the end of the spindle is provided on the pressing means, since the exhaust pipe for discharging the air in the space formed between the housing and the spindle are in communication with the housing, when the hole formation It becomes possible to smoothly discharge the generated cutting chips to the outside.

Furthermore, since the form communication holes for communicating the the outer first insertion hole in the pressing member, the chips of the drill and its vicinity can Succoth Fukitoba into the housing by the outside air flowing from the communicating hole As a result , chips can be discharged more smoothly.

By forming a guide groove for movably guiding the tip of the drill over the first insertion hole and the second insertion hole in the pressing member, the pressing means of the present invention can be applied without making a great change to the conventional drilling device. Can be applied. 200 to 1 of the diameter of the largest drill that uses the diameter of the first insertion hole
When it is set to 10%, it is possible to effectively prevent the vibration of the work, improve the machining position accuracy of the hole, and prevent damage to the drill due to runout.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional front view of a main part of a drilling device.

FIG. 2 is a bottom view of the holding means.

FIG. 3 is a front view of the holding means.

FIG. 4 is a plan view of the holding means.

FIG. 5 is a vertical sectional view of the pressing member.

FIG. 6 is a perspective view of a holding member.

[Figure 7] Operation explanatory diagram during drilling

[Fig. 8] Operation explanatory diagram when exchanging the drill

[Explanation of symbols]

1 drill 2 drill body 3 shank part 4 shoulder part 5 Printed wiring board 6 Lower plate 7 Reliable plate 10 Processing device 11 Spindle 12 Drill chuck 13 Holding means 14 pressure contact means 15 switching means 16 Housing 17 Saddle 18 Air cylinder 19 Piston rod 20 Support 21 Guide rod 22 Bracket part 23 Exhaust space 24 Exhaust pipe 25 Opening 26 slide plate 27 opening 28 Guide member 29 Air cylinder 30 Holding member 31 First insertion hole 32 second insertion hole 33 pressing surface 34 Projection 35 Recess 36 guide groove 37 groove 38 Communication hole W work

Claims (3)

(57) [Claims] 1. A first insertion hole for drilling, which has a size suitable for the drill, and a second insertion hole for exchanging a drill, which has a larger diameter than the first insertion hole, as pressing means for pressing the periphery of a drilling position of a workpiece. And a pressing member having a pressing surface that presses the work at least around the first insertion hole, a pressure contact means for pressing the pressing surface of the pressing member against the work, and a drill by a sliding operation of the pressing member. Switching means for switching the facing hole of the pressing member between the first insertion hole and the second insertion hole, and the pressing means is mounted on the end of the spindle.
A housing is provided, and it is formed between the housing and the spindle.
The exhaust pipe that discharges the air in the space
While communicating with each other, the pressing member is connected to the inside of the first insertion hole.
Form a communication hole that communicates with the outside, and flow in from the communication hole
The outside air is used to remove the chips from the drill and its vicinity inside the housing.
A drilling device characterized by being blown off to the inside. 2. A first insertion hole and a second insertion hole in the pressing member.
Guide that movably guides the drill tip across the hole
The drilling device according to claim 1, wherein a groove is formed . 3. The largest using the hole diameter of the first insertion hole.
Claim set to 200 to 110% of the diameter of the drill.
The drilling device according to 1 or 2.