TWI656928B - Hole forming apparatus - Google Patents

Abstract

The drilling device of the present invention is a drilling device that drills a workpiece by moving a main shaft portion capable of mounting a drill bit along an axial direction of the drill bit, and is characterized by comprising: a hose, which is The front end portion has a suction port for collecting cutting chips during drilling; the hose is connected to the first end portion closer to the base end side than the suction port, and is fixed to a first fixing portion that moves together with the main shaft portion.

Description

Drilling device

The invention relates to a drilling device.

There is known a drilling device that drills a printed circuit board or the like by drilling. When machining is performed by this drilling device, a large amount of cutting chips may occur, so that there is a possibility that damage to the printed circuit board due to the cutting chips or failure of the drilling device may occur due to blockage of the cutting chips.

For example, the drilling device described in Japanese Patent Application Laid-Open No. 2008-168404 (hereinafter, referred to as Patent Document 1) includes a drill bit for perforating a workpiece, and a backing plate for drilling Abutting on the object to be processed; and a support body having a shim plate protrudingly provided on one side thereof and having an air suction port on the one side; and a suction means which is cutting to occur when drilling is performed by a drill The crumbs are attracted into the support body.

According to the drilling device described in Patent Document 1, cutting chips can be efficiently collected.

However, the drilling device of the prior art can be regarded as: the front end of a duct hose is connected to a chip discharge port for surrounding a dust collecting part around the drill bit, thereby collecting cutting during drilling Crumbs. However, in the prior art drilling device, the distal end of the telescopic hose is installed near the drill bit, and therefore during the drilling process, tension occurs in the telescopic hose due to the relative movement of the tip of the drill and the telescopic hose. As a result, the drill bit is tightened by the telescopic hose, which may reduce the position accuracy of the drill bit during processing. Therefore, the drilling device of the prior art has room for improvement in terms of improving machining accuracy.

Accordingly, the present invention provides a drilling device capable of efficiently processing cutting chips while machining with excellent accuracy.

The drilling device of the present invention is a drilling device that drills a workpiece by moving a main shaft portion capable of mounting a drill bit along an axial direction of the drill bit, and is characterized in that: The front end portion has a suction port for collecting cutting chips during drilling; the hose is connected to the first end portion closer to the base end side than the suction port, and is fixed to a first fixing portion that moves together with the main shaft portion.

According to the present invention, since the hose is fixed to the first fixing portion moving together with the main shaft portion closer to the base end side than the suction port, the relative movement of the drill and the front end portion of the hose can be suppressed. This makes it possible to use the first fixing portion to absorb a change in tension that occurs when the hose moves at the main shaft portion, so that it is possible to prevent the change in tension of the hose from acting on the suction port. Therefore, it is possible to obtain a drilling device capable of efficiently processing cutting chips while performing machining with excellent accuracy.

The above-mentioned drilling device is characterized by comprising: a body portion; The main shaft portion is supported so as to be movable in the axial direction of the drill bit; the hose is fixed to the base end side closer to the fixing portion of the first fixing portion, and is fixed to the first portion fixed to the main body portion. 2 fixing portions, and the hose is bent between the first fixing portion and the second fixing portion.

According to the present invention, since the hose is closer to the base end side than the fixing portion of the first fixing portion and is fixed to the body portion by the second fixing portion in a bent state, the main shaft portion can be absorbed by the bent portion to the body The tension of the hose changes when the part moves. Therefore, it is possible to prevent a change in the tension of the hose from acting on the main shaft portion via the first fixing portion.

In the above drilling device, the suction port is connected to the main shaft portion through a connection portion, and a buffer member is disposed between the connection portion and the main shaft portion.

According to the present invention, since the suction port of the hose is connected to the main shaft portion via a buffer member, even if a tension occurs near the front end of the hose due to a change in suction pressure or the like, the change in the tension can be absorbed by the buffer member. . Therefore, it is possible to prevent a change in the tension of the hose from acting on the main shaft portion.

According to the drilling device of the present invention, since the hose is fixed to the first fixing portion that moves together with the main shaft portion closer to the base end side than the suction port, the relative movement of the drill and the front end portion of the hose can be suppressed. This makes it possible to use the first fixing portion to absorb a change in tension that occurs when the hose moves at the main shaft portion, so that it is possible to prevent the change in tension of the hose from acting on the suction port. Therefore, it is possible to obtain a drilling device capable of efficiently processing cutting chips while performing machining with excellent accuracy.

1‧‧‧Drilling device

2‧‧‧ frame

3‧‧‧ cover

5‧‧‧Workbench

10‧‧‧Processing Department

11‧‧‧stand (main body)

11a‧‧‧Mounting Department

11b‧‧‧ support

12‧‧‧ Guide for Spindle

14‧‧‧ Spindle moving mechanism

14a‧‧‧Workbench

16‧‧‧ 2nd fixed part

20‧‧‧ Spindle Holder

21‧‧‧The first fixed part

23‧‧‧ Spindle

24‧‧‧Motor Department

26‧‧‧ spring member

30‧‧‧ Dust collection department

30a‧‧‧ opening

30b‧‧‧Exhaust

31‧‧‧Cylinder

31a‧‧‧drilling

32‧‧‧ cushion

40‧‧‧hose

40a‧‧‧Front end

40b‧‧‧The first fixed part

40c‧‧‧The second fixed part

41‧‧‧Suction port

43‧‧‧Connection Department

45‧‧‧O ring (buffer member)

D‧‧‧drill

W‧‧‧ Workpiece

Figure 1 is a perspective view of a drilling device.

Figure 2 is a front view of the processing section.

Fig. 3 is a cross-sectional view of a dust collecting portion.

Fig. 4 is a front view of the connecting portion.

Fig. 5 is a side view of the machining portion on the left.

Fig. 6 is an enlarged front view of the lower portion of the main shaft portion during drilling.

Fig. 7 is an enlarged front view of the lower portion of the main shaft portion during the drilling process.

Hereinafter, embodiments of the present invention will be described based on the drawings.

Fig. 1 is a perspective view of a drilling device according to this embodiment. In addition, the drilling device is used in a state where it is placed on the installation surface. In the figure, the arrow UP is defined as upward, the arrow FR is defined as forward, and the arrow LH is defined as left.

As shown in FIG. 1, the drilling device 1 moves the main shaft portion 23 to which the drill bit D (see FIG. 2) can be mounted in the up-down direction and moves along the axial direction (up-down direction) of the drill D. This drills a workpiece W such as a printed circuit board. The drilling device 1 includes: a frame body 2; and a cover body 3 covering the upper surface of the frame body 2.

The frame body 2 is formed in a rectangular parallelepiped shape. A work table 5 on which the work W is placed in the horizontal direction is arranged on the upper surface of the housing 2. The work table 5 is formed by, for example, a linear actuator (linear A workpiece table moving mechanism (not shown) composed of an actuator, etc. is configured to be movable along the front-back direction within a predetermined range on the upper surface of the housing 2.

In addition, a pair of processing portions 10 are arranged on the upper surface of the housing 2 along the left-right direction. The pair of processing sections 10 are configured to be individually movable in the left-right direction within a predetermined range by a gantry moving mechanism (not shown) formed of, for example, a linear actuator. The pair of processed portions 10 are plane-symmetrical with respect to a surface orthogonal to the left-right direction. Therefore, in the following description, the processing portion 10 on the left side will be mainly described, and the portions corresponding to the processing portion 10 on the left side of the processing portion 10 on the right side are denoted by the same reference numerals and description thereof will be omitted.

Figure 2 is a front view of the processing section.

As shown in FIG. 2, the processing section 10 includes: a stand 11 (corresponding to the “body section” in the request); and a spindle section 23; and a spindle holding section 20 for holding the spindle section 23; and The main shaft moving mechanism 14 moves the main shaft holding portion 20 in the vertical direction, and the hose 40 has a suction port 41 at the front end portion 40 a for collecting cutting chips during drilling.

The gantry 11 supports the main shaft portion 23 so as to be movable in the vertical direction. The gantry 11 includes: a mounting portion 11a for mounting the main shaft holding portion 20 and the spindle moving mechanism 14; and a support portion 11b for connecting the mounting portion 11a and the gantry moving mechanism.

The mounting portion 11a is formed in a rectangular plate shape when viewed from the front surface before the ribs are provided. A front surface of the mounting portion 11a is provided with: The holding portion 20; the main shaft moving mechanism 14; and three main shaft guides 12 which support the main shaft holding portion 20 so as to be slidable in the vertical direction.

The spindle moving mechanism 14 is, for example, a linear actuator or the like, and includes a table 14a that moves in the vertical direction. The spindle moving mechanism 14 is disposed at the left end of the front surface of the mounting portion 11a.

The three main shaft guides 12 are rail-like members extending in the vertical direction. The three spindle guides 12 are arranged on the right side of the spindle moving mechanism 14 in front of the mounting portion 11a, and are mounted at equal intervals in the left-right direction.

The main shaft holding portion 20 is formed in a U-shape with an opening at the bottom, and is formed along the vertical direction with left and right sides. The main shaft holding portion 20 is mounted on the three main shaft guides 12 so as to be slidable. More specifically, the main shaft holding portion 20 is attached to the right and center main shaft guides 12 in the right portion thereof, and holds the main shaft portion 23 by the front surface. At this time, the main shaft portion 23 is located at a substantially intermediate position of the main shaft guide 12 disposed on the right side and the center in front view. In addition, the main shaft holding portion 20 extends outward from the upper end of the right portion toward the left, and is connected to the upper end of the left portion. The left portion of the spindle holding portion 20 is attached to the left spindle guide 12 and is connected to the table 14 a of the spindle moving mechanism 14. As a result, the spindle holding portion 20 can be driven in the vertical direction.

The support portion 11b extends upward from the gantry moving mechanism, further extends to the right above the frame body 2, and is connected to a corner portion at the lower left of the mounting portion 11a. The mounting portion 11a is supported by the support portion 11b, whereby the mounting portion 11a can be placed on the workpiece W placed on the workpiece table 5. Side, the workpiece W is relatively moved in the forward, backward, leftward, and rightward directions.

The main shaft portion 23 includes a motor portion 24 and a dust collection portion 30 disposed at a lower end of the motor portion 24. The motor portion 24 has a cylindrical shape extending in the vertical direction, and rotates a drill D attached to the lower end thereof about an axis in the vertical direction. The diameter of the drill D is, for example, about 3 mm, and is mounted so as to protrude downward from the lower end of the motor portion 24.

Fig. 3 is a cross-sectional view of a dust collecting portion.

As shown in FIG. 3, the dust collecting unit 30 is formed in a rectangular box shape in front view, and is arranged to cover the drill D. The dust collection unit 30 includes an opening portion 30a formed on the upper surface, a discharge port 30b formed on the right side surface, and a cylindrical portion 31 protruding from the lower surface. The opening portion 30 a is formed so that the lower end portion of the motor portion 24 can be fitted, and a packing 32 is mounted between the motor portion 24 and the opening portion 30 a. The dust collecting unit 30 is slidable to the outer peripheral surface of the motor unit 24 by the inner peripheral surface of the opening portion 30a, and is capable of moving the motor unit 24 upward and downward in a state where the gap is blocked by the gasket 32. The discharge port 30b is connected to a suction port 41 (see FIG. 2) of the hose 40 through a connection portion 43 described later. The cylindrical portion 31 is coaxial with the cylindrical motor portion 24. A drilled hole 31 a is formed below the cylindrical portion 31 so as to be coaxial with the drill D mounted on the main shaft portion 23. The inner diameter of the hole 31a is slightly larger than the outer diameter of the drill D.

Returning to FIG. 2, the dust collecting portion 30 is supported in a state of being biased downward with respect to the motor portion 24 by a pair of elastic members 26 fixed to the spindle holding portion 20. Bit D, contained in front view Inside the dust collecting portion 30, the dust collecting portion 30 is supported upward and upward toward the motor portion 24, thereby being inserted into the bore 31 a and protruding downward from the cylindrical portion 31.

Fig. 4 is a front view of the connecting portion.

The hose 40 is formed of an elastic material such as rubber. The front end portion 40 a of the hose 40 is connected to the dust collection portion 30 through the connection portion 43. As shown in FIG. 4, the connection portion 43 is formed of, for example, a metal material. The connecting portion 43 is an L-shaped cylindrical member having an upper end and a left end opening, and the upper end is embedded in the suction port 41 of the hose 40, and the left end is embedded in the discharge port 30b of the dust collecting portion 30 (see the first section). 3 images). Here, an O-ring 45 (corresponding to the "buffering member" in the claim) is arranged between the connection portion 43 and the discharge port 30b.

Fig. 5 is a side view of the machining portion on the left.

As shown in FIG. 2 and FIG. 5, the hose 40 is arranged upward from the front end portion 40 a and along the vertical direction. The hose 40 is fastened to the first fixing portion 40b closer to the base end side than the suction port 41, and is fixed to the first fixing portion 21 formed in the upper right portion of the spindle holding portion 20. Furthermore, as shown in FIG. 5, the hose 40 is fastened to the second fixing portion 40c closer to the base end side than the first fixing portion 40b, and is fixed to the second protrusion protruding from the upper right portion of the mounting portion 11a toward the rear.固定 部 16。 Fixed portion 16. The hose 40 is smoothly curved so that the upper side becomes convex under the side view between the first fixing portion 40b and the second fixing portion 40c. This makes it possible to absorb a change in the tension of the hose 40 that occurs when the spindle holding portion 20 (see FIG. 2) moves in the vertical direction.

The hose 40 sucks air by connecting a base end portion to a fan (not shown). As a result, since the inside of the dust collecting portion 30 connected to the hose 40 becomes a negative pressure, cutting chips generated during drilling are attracted through the gap between the drill D and the drilling 31a of the dust collecting portion 30 ( (See Figure 3).

The drilling operation of the drilling device 1 according to this embodiment will be described below. In addition, regarding the symbol of each component in the following description, refer to FIG. 2 and FIG. 5. In the following description, a series of printed circuit boards will be described as an example of the workpiece W.

When the drilling device 1 drills the workpiece W, the drill D is first moved toward a predetermined position opposite to the workpiece W by the workpiece table moving mechanism and the rack moving mechanism. At this time, an X-ray camera or the like (not shown) is used to capture the formation pattern of the circuit of the workpiece W, and the position where the drilling is performed is accurately measured.

Figures 6 and 7 are enlarged front views of the lower portion of the main shaft portion during drilling.

Next, as shown in FIG. 6, the spindle holding portion 20 is moved toward the workpiece W, and the lower surface of the cylindrical portion 31 of the dust collecting portion 30 is brought into contact with the surface of the workpiece W. At this time, since the spindle holding portion 20 moves downward with respect to the gantry 11, the hose 40 is deformed between the first fixing portion 40b and the second fixing portion 40c. Here, the hose 40 is fixed so as to be bent between the first fixing portion 40b and the second fixing portion 40c. Therefore, the hose 40 is capable of absorbing a change in tension due to deformation between the first fixing portion 40b and the second fixing portion 40c. Furthermore, because of the hose 40, the front end portion 40a and the bent portion are located at the first fixing portion 21 of the bag. On the opposite side, it is possible to prevent the change in tension occurring in the bent portion from affecting the front end portion 40a. Therefore, the main shaft portion 23 can be moved toward the workpiece W without being affected by the change in the tension of the hose 40, and it is possible to prevent the drilling position from shifting.

Next, as shown in FIG. 7, the spindle holding portion 20 is further moved toward the workpiece W. At this time, since the lower surface of the cylindrical portion 31 of the dust collecting portion 30 is in contact with the workpiece W, the dust collecting portion 30 moves the motor portion 24 relatively upward while continuously lowering the motor portion 24 further. Thereby, the drill D attached to the lower end of the motor portion 24 protrudes downward from the drilled hole 31 a (see FIG. 3) of the dust collecting portion 30 and drills a hole in the workpiece W. At this time, a fan (not shown) connected to the base end portion of the hose 40 is operated, and the dust collecting portion 30 is in a state of sucking air from the bore 31a. Therefore, cutting chips generated by the drilling process can be sucked from the drilling 31a and sent to the hose 40 through the discharge port 30b (see FIG. 3).

The hose 40 in the state shown in Fig. 7 is compared with the state shown in Figs. 2 and 6 between the front end portion 40a and the first fixing portion 40b, and the compression direction occurs in a vertical direction. Of tension. Here, the dust collecting portion 30 can move the motor portion 24 only in the vertical direction as described above. Therefore, the change in the tension in the up-down direction of the hose 40 does not act on the drill D via the dust collecting portion 30, and it is possible to suppress the deviation of the drilling position in the left-right direction before and after the drill D.

In addition, even if tension occurs in the hose 40 due to fluctuations in suction pressure, etc., and the tip portion 40a of the hose 40 is slightly displaced in the front-rear, left-right, and left-right directions, the O-ring 45 is disposed between the dust collecting portion 30 and the connecting portion 43. (See (See Fig. 4) The small displacement of the front end portion 40 can still be absorbed. Thereby, it is possible to suppress a change in tension occurring at the end portion 40 a before the hose 40 and to act on the drill D.

As described above, the drilling device 1 according to the present embodiment includes the hose 40 having the suction port 41 at the distal end portion 40 a for collecting cutting chips during drilling. The hose 40 is fastened to the proximal end side than the suction port 41 and is fixed to the first fixing portion 21 that moves together with the main shaft portion 23.

According to this configuration, since the hose 40 is fixed to the first fixing portion 21 that moves together with the main shaft portion 23 closer to the base end side than the suction port 41, the relative movement of the drill D and the front end portion 40a of the hose 40 can be suppressed . This makes it possible to absorb the change in tension of the hose 40 when the main shaft portion 23 moves by using the first fixing portion 21, so that it is possible to prevent the change in tension of the hose 40 from acting on the suction port 41. Therefore, it is possible to obtain a drilling device capable of efficiently processing cutting chips while performing machining with excellent accuracy.

The hose 40 is fastened to the proximal end side than the first fixing portion 40b, is fixed to the second fixing portion 16 fixed to the stand 11, and is bent between the first fixing portion 40b and the second fixing portion 40c. .

According to this configuration, since the hose 40 is closer to the base end side than the first fixing portion 40b and is fixed to the stand 11 by the second fixing portion 16 in a bent state, the main shaft portion 23 can be absorbed in the bent portion. A change in the tension of the hose 40 that occurs when the gantry 11 is moved. Therefore, it is possible to prevent a change in the tension of the hose 40 from acting on the main shaft portion 23 via the first fixing portion 21.

The suction port 41 is connected to the main shaft portion 23 (dust collection portion 30) through the connection portion 43, and an O-ring 45 is disposed between the connection portion 43 and the main shaft portion 23.

According to this configuration, since the suction port 41 of the hose 40 is connected to the main shaft portion 23 via the O-ring 45, even if tension occurs near the front end of the hose 40 due to a change in suction pressure, etc., the O-ring can still be 45 absorbs this change in tension. Therefore, it is possible to prevent a change in the tension of the hose 40 from acting on the main shaft portion 23.

In addition, the present invention is not limited to the above-described embodiments described with reference to the drawings, but various modifications can be considered within the technical scope thereof.

For example, in the embodiment described above, although the O-ring 45 is disposed as the buffer member between the connection portion 43 and the dust collecting portion 30, it is not limited to this. For example, the buffer member may be a bellows type pipe, and the connection portion 43 itself may be a bellows type pipe. In this case, it is preferable that the bellows-type pipe has a higher stretchability than the hose 40.

In addition, as long as it does not deviate from the meaning of this invention, the component of the said embodiment can be replaced with a well-known component suitably.

Claims (2)

A drilling device is a drilling device that drills a workpiece by moving a main shaft portion capable of mounting a drill bit along an axial direction of the drill bit, and is characterized by comprising: a hose at a front end portion A suction port for collecting cutting chips during drilling; and a main body portion supporting the main shaft portion so as to be movable in the axial direction of the drill bit; the hose is located closer to the base end side than the suction port And is fixed to the first fixing portion that moves together with the main shaft portion, is closer to the base end side than the fixing portion of the first fixing portion, and is fixed to the second fixing portion fixed to the main body portion; and The hose is bent between the first fixing portion and the second fixing portion. According to the drilling device of claim 1, the suction port is connected to the main shaft portion through a connection portion, and a buffer member is arranged between the connection portion and the main shaft portion.