JP2003251509A - Tool for precision machining, machining device, and precision machining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool for precise machining for performing minute diameter drill machining easily at low cost by feeding a machining tool such as a drill with high precision even when using a general-purpose machining device. <P>SOLUTION: This tool for precise machining is provided with a mounting adapter 30 fixed to a main spindle 13, a first arm 34 extended in the direction crossing the axial direction from the mounting adapter 30, a female screw hole 34a provided in the first arm 34, a male screw bar 41 which is screw-fitted in the female screw hole 34a, protrudes a part of it onto a plate member W side along the axial direction from the first arm 34, and lets its tip part abut on a horizontally fixed block 17 on which a workpiece is put, and a disc 42 for rotating the male screw bar 41 around its axis by a predetermined angle. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precision machining jig, a machining device and a precision machining method for performing precision machining such as drilling for forming a hole having a minute diameter, and particularly at low cost and high cost. Related to those that can perform accurate processing.

[0002]

2. Description of the Related Art As a method for machining a minute hole, there are electric discharge machining, electron beam machining, laser machining, drilling and the like. Of these, drilling is the most general and simple method. 2.6 μm diameter among commercially available drills
The smallest drill is a drill that can be chucked on a general-purpose drilling machine and is easily available, and has a diameter of 40 μm.

However, in the micro-diameter drilling, even if there is a drill having a desired diameter, it is not possible to easily make a hole, and the swinging of the rotary shaft of the drilling machine is suppressed, the chucking accuracy of the drill is improved, and the drilling is excessive. It is necessary to prevent drill feed. Therefore, for example, there is also a method of using a dedicated machine for micro-diameter drilling, which can perform micro-diameter drilling with high accuracy by strictly controlling the torque when sending the drill.

[0004]

The following problems have been encountered in the drilling using the special machine for the above-mentioned small-diameter drilling. That is, in a special-purpose machine, since a hole having a small diameter is machined by controlling the torque when sending a drill, the torque is measured with high accuracy.
For this reason, the apparatus becomes expensive, and since it is a dedicated machine for micro-diameter drilling, it is difficult to introduce the dedicated machine in a factory or the like where the frequency of micro-diameter drilling is low. On the other hand, if such a dedicated machine is not used, it is necessary to send the drill in micron order, but there is no one that can send the drill with such high precision.

Therefore, according to the present invention, even when a general-purpose processing device is used, by sending a processing tool such as a drill with high precision, it is possible to perform precision drilling for easily carrying out small-diameter drilling at low cost. It is an object of the present invention to provide a processing jig, a processing device, and a precision processing method.

[0006]

In order to solve the above problems and achieve the object, the precision machining jig, the machining apparatus and the precision machining method of the present invention are configured as follows.

(1) In a precision machining jig to which a drill for making a hole in a workpiece is attached and which is detachably attached to a spindle driven along the axial direction of the drill, An attachment / detachment portion fixed to the main shaft, an arm portion extending from the attachment / detachment portion in a direction intersecting the axial direction, a female screw hole provided in the arm portion, and screwed into the female screw hole. A male screw rod for projecting a part of the arm portion from the arm portion toward the workpiece along at least the axial direction and abutting the tip end thereof on a workbench on which the workpiece is placed. And a rotating portion for rotating the male screw rod about its axis by a predetermined angle.

(2) The precision machining jig described in (1) above is characterized by comprising a measuring means for measuring the amount of movement of the spindle in the axial direction.

(3) In a precision machining jig to which a machining tool for machining a workpiece is attached and which is detachably attached to a spindle driven along the machining direction of the machining tool, An attachment / detachment portion fixed to the main shaft, an arm portion extending from the attachment / detachment portion in a direction intersecting the axial direction of the drill, a female screw hole provided in the arm portion, and a screw thread in the female screw hole. A part for projecting from the arm portion to the workpiece side along at least the axial direction while abutting the tip end thereof to a work table on which the workpiece is placed. It is characterized by including a male screw rod and a rotating portion for rotating the male screw rod around its axis by a predetermined angle.

(4) In a processing apparatus for processing a workpiece using a processing tool, a workbench on which the workpiece is placed,
It is equipped with a spindle that reciprocates toward this work table and has a processing tool attached to its tip, and a precision machining jig that is fixed to this spindle. The precision machining jig is removable from the spindle. An attachment / detachment portion fixed to the arm portion, an arm portion extending from the attachment / detachment portion in a direction intersecting the axial direction of the drill, and a female screw hole having an axis provided in the arm portion and parallel to the axial direction, For being screwed into this female screw hole and projecting at least a part thereof from the arm portion in the traveling direction of the drill, the tip end portion thereof is brought into contact with a work table on which the workpiece is placed. A male threaded rod,
And a rotating portion for rotating the male screw rod about its axis by a predetermined angle.

(5) In a precision machining method in which a machining tool for machining a workpiece is provided at the tip and is attached to a spindle that reciprocates along the machining direction, the spindle is driven in the axial direction, and The processing tool contacting step of bringing the tip of the processing tool into contact with the work piece, and the male threaded rod being screwed into the female screw hole provided in the fixing member attached to the spindle, the tip of the work piece A screwing step of abutting against the mounted work table, a separating step of rotating the male screw rod to separate the male screw rod from the work table by a predetermined dimension, and driving the main shaft in its axial direction. The present invention is characterized by including a processing step of processing the workpiece with the processing tool, and a restriction step of restricting the movement of the spindle by the tip of the male screw rod contacting the work table.

[0012]

FIG. 1 is a general-purpose drilling machine 1 to which a precision machining jig 20 according to an embodiment of the present invention is attached.
0 is a perspective view, FIGS. 2 to 5 are diagrams showing respective parts of the precision machining jig 20, and FIG. 6 is an explanatory diagram showing machining steps.

The general-purpose drilling machine 10 includes a workbench 11, a spindle drive section 12 mounted on the workbench 11 by a support column (not shown), and an arrow Z in FIG.
The main shaft 13 reciprocating in the direction, the rotary shaft 14 attached to the main shaft 13, the chuck mechanism 15 attached to the tip of the rotary shaft 14 for fixing the drill D, and the plate material W that is the workpiece. And a supporting base 16 for

On the workbench 11, horizontal fixing blocks 17, 18 for abutting against the male screw rod 41 of the feed amount adjusting gauge 40 of the precision machining jig 20 and the tip of the spindle 52 of the dial gauge 50, which will be described later, are stacked. It is rare.

A precision machining jig 20 is removably attached to the spindle 13. The precision machining jig 20 includes a mounting adapter 30 mounted on the spindle 13, a feed amount adjusting gauge 40 mounted on a first arm 34 of the mounting adapter 30 described later, and a second arm 35 of the mounting adapter 30 described later. Dial gauge 50 attached to
It has and.

The mounting adapter 30 is shown in FIGS.
As shown in (d), it is provided with a first member 31 and a second member 32 that are arranged opposite to each other with the main shaft 13 interposed therebetween. The first member 31 and the second member 32 sandwich the outer periphery of the main shaft 13 by the recess 31a of the first member 31 and the recess 32a of the second member 32, and the screw hole 31b of the first member 31 and the second member 3 are formed.
It fastens with the bolt 33 inserted in the 2nd through-hole 32b. In order to adjust the difference between the inner diameter of the recess 31a and the recess 32a and the outer circumference of the main shaft 13, (a) of FIG.
A spacer 34 having a semicircular cross section as shown in (b) may be sandwiched.

The first member 31 has a first arm 34 and a second arm 35 extending on both sides thereof. First
The arm 34 is provided with a hole 34a in which a female screw is formed. Further, the second arm 35 is provided with a recessed portion 35a in which a female screw is formed.

The feed amount adjusting gauge 40 includes a male screw rod 41 having a male screw (pitch) screwed into the hole 34a.
And a disc 42 provided on the upper end of the male screw rod 41,
And a pointer 43 attached to the disk 42.

On the side surface of the disk 42, 100 grooves 42a and one notch 42b are cut at equal intervals. Groove 42a
Is used as a scale. For example, assuming that the thread pitch of the male screw rod 41 is 0.5 mm and the number of the grooves 42a is 100, when the scale is rotated by one scale, the male screw rod 41 becomes 0.0
It will be advanced by 05 mm. A pointer 43 that is inserted into the notch 42b of the disk 42 is used as a scale guide.

The dial gauge 50 includes a meter section 51 and
A spindle 52 attached to the meter unit 51 is provided. A bracket (not shown) provided on the back surface side of the meter unit 51 is fastened by a bolt (not shown) inserted into the recess 35a of the second arm 35. The axial displacement of the spindle 52 is displayed on the meter unit 51.

Using the general-purpose drilling machine 10 and the precision machining jig 20 thus constructed, the micro-diameter drilling is carried out as follows. First, the plate material W to be processed is fixed to the chuck mechanism 15. A fixing jig may be used if necessary.

The precision machining jig 20 is attached to the spindle 13. At this time, the type of the horizontal fixed block 18 is exchanged and the number of the accumulated parts is increased so that the tip of the spindle 52 of the dial gauge 50 contacts the horizontal fixed block 18.

Next, the chuck mechanism 15 of the general-purpose drilling machine 10
The drill D is attached to, and the spindle 13 is lowered to a position where the blade edge of the drill D contacts the surface of the plate material W. The scale of the meter portion 51 of the dial gauge 50 at the time of contact is set to the zero point. Further, the type of the horizontal fixed block 17 is exchanged, the number of the horizontal fixed block 17 is increased, etc. so that the tip of the male screw rod 41 of the feed amount adjusting gauge 40 contacts the horizontal fixed block 17.

Next, the disk 42 is rotated by a necessary amount to raise the cutting amount t1 from the horizontal fixed block 17 by the first cutting amount as shown in FIG. 6 (a). Then, after slightly raising the main shaft 13, the rotation of the rotary shaft 14 is started at 1100 to 2900 rpm, and the main shaft 13 is slowly lowered,
The cutting of the plate material W is started.

Cutting progresses as the spindle 13 descends, and when the tip of the male screw rod 41 of the feed amount adjusting gauge 40 abuts on the horizontal fixed block 17, the descending is regulated, so that the spindle 13 also stops descending. At this time, as shown in FIG. 6B, the cutting edge of the drill D has advanced to the plate material W by a depth t1. The scale of the dial gauge 50 indicates t1.

Next, the disk 42 is rotated by a necessary amount, and as shown in FIG. 6 (c), is raised by the second cutting amount t2 from the horizontal fixed block 17. Then, after slightly raising the spindle 13, the spindle 13 is slowly lowered to restart the cutting of the plate material W.

Cutting progresses as the spindle 13 descends, and when the tip of the male screw rod 41 of the feed amount adjusting gauge 40 abuts on the horizontal fixed block 17, the descending is regulated, so that the spindle 13 stops descending. At this point, as shown in FIG. 6D, the cutting edge of the drill D advances into the plate material W by a depth t2. At this time, the scale of the meter portion 51 of the dial gauge 50 indicates t1 + t2 which is the sum of the first cutting amount t1 and the second cutting amount t2.

The above process is repeated. In addition, as appropriate
Remove chips, etc. and supply lubricating oil as needed. Then, when the scale of the dial gauge 50 becomes equal to or larger than the thickness of the plate material W, the cutting work is finished.

The feed amount is preferably reduced gradually.
That is, the feed amount is increased at the beginning of processing, and the feed amount is decreased as the hole becomes deeper. For example, 0.3 mm
In case of the hole, the feed amount is 0.02mm, 0.01mm,
It is 0.005 mm.

As described above, when the drilling is performed using the general-purpose drilling machine 10 and the precision machining jig 20 according to the present embodiment, the drill D can be fed in minute amounts, and the hole machining can be performed with high accuracy. It can be carried out. Specifically, thickness 3
mm stainless plate has a diameter of 0.3 mm and a thickness of 1 mm
0.25 mm, 0.2 mm for the stainless steel plate of 0.15 mm, 0.1 m for the 0.3 mm thick stainless steel plate
m drilling was possible.

The present invention is not limited to the above embodiment. That is, in the above-mentioned example, the pitch of the male screw is 0.5 mm and the scale of the feed amount adjusting gauge 40 is 1
The amount of progress per scale is 0.005
Although it is set to mm, it can be appropriately changed depending on the diameter of the drill, the thickness and material of the workpiece. Instead of the horizontal fixed block, a horizontal fixed whose height can be freely adjusted may be used.

Although the general-purpose drilling machine has been described,
By manufacturing an attachment adapter for other processing machines according to the diameter of the spindle, it can be used for a lathe push cup and a vertical milling machine (where the spindle can be moved up and down manually). In particular, when attached to a milling machine, it is possible to determine the hole processing position by using the XYZ stage, and by using it together with the position (Magnet) scale,
More accurate drilling is possible. Of course, various modifications can be made without departing from the scope of the present invention.

[0033]

According to the present invention, even with a general-purpose processing device, it is possible to easily perform a small-diameter drilling process by sending a processing tool such as a drill with high accuracy. Become.

[Brief description of drawings]

FIG. 1 is a perspective view showing a general-purpose drilling machine to which a precision machining jig according to an embodiment of the present invention is attached.

2A and 2B are diagrams showing the precision machining jig, wherein FIG. 2A is a left side view, FIG. 2B is a plan view, FIG. 2C is a right side view, and FIG.
Is a front view.

3A and 3B are views showing a spacer incorporated in the precision machining jig, wherein FIG. 3A is a front view and FIG. 3B is a plan view.

4A and 4B are diagrams showing a feed amount adjusting gauge incorporated in the precision machining jig, wherein FIG. 4A is a front view and FIG. 4B is a plan view.

5A and 5B are views showing a pointer incorporated in the precision machining jig, wherein FIG. 5A is a side view and FIG. 5B is a front view.

FIG. 6 is an explanatory view showing a process of drilling using the precision machining jig.

[Explanation of symbols]

10-General purpose drilling machine 13 ... Spindle 14 ... Rotation axis 15 ... Chuck mechanism 17, 18 ... Horizontal fixed block 20 ... Precision processing jig 30 ... Mounting adapter 34 ... First arm 34a ... hole 40 ... Feed amount adjustment gauge 41 ... Male threaded rod 42 ... Disc 50 ... Dial gauge 52 ... Spindle D ... drill W ... Plate

Claims (5)

[Claims] 1. A precision machining jig to which a drill for making a hole in a workpiece is attached, and which is detachably attached to a spindle driven along the axial direction of the drill, wherein And an arm portion extending in a direction intersecting the axial direction from the attachment / detachment portion, a female screw hole provided in the arm portion, and being screwed into the female screw hole. A male screw rod for projecting a part of the arm portion toward the workpiece along at least the axial direction and abutting the tip portion thereof on a workbench on which the workpiece is placed. A jig for precision processing, comprising: a rotating part for rotating the male screw rod about its axis by a predetermined angle. 2. The precision machining jig according to claim 1, further comprising measuring means for measuring the amount of movement of the spindle in the axial direction. 3. A precision machining jig to which a machining tool for machining a workpiece is attached, and which is detachably attached to a spindle driven along the machining direction of the machining tool. An attachment / detachment portion fixed to the main shaft, an arm portion extending from the attachment / detachment portion in a direction intersecting with the axial direction of the drill, a female screw hole provided in the arm portion, and a screwing engagement with the female screw hole. A male member for projecting a part of the arm portion from the arm portion toward at least the workpiece side along the axial direction and abutting the tip end thereof on a workbench on which the workpiece is placed. A precision machining jig, comprising: a threaded rod; and a rotating portion that rotates the male threaded rod around its axis by a predetermined angle. 4. A processing apparatus for processing a work piece using a work tool, a work table on which the work piece is placed, and a reciprocating movement toward the work table, and the work tool attached to the tip thereof. And a precision machining jig fixed to the main spindle. The precision machining jig is provided with an attachment / detachment portion detachably fixed to the main spindle, and from the attachment / detachment portion in the axial direction of the drill. An arm portion extending in the intersecting direction, a female screw hole provided in the arm portion and having an axis parallel to the axial direction, and screwed into the female screw hole, and at least from the arm portion of the drill. A male screw rod for projecting a part of it in the traveling direction and bringing its tip end into contact with the workbench on which the workpiece is placed, and a male screw rod around the axis by a predetermined angle. And a rotating part for rotating. Processing apparatus according to claim and. 5. A precision machining method in which a machining tool for machining a workpiece is provided at the tip and is attached to a spindle that reciprocates along the machining direction, wherein the spindle is driven in the axial direction and the processing is performed. A process tool contacting step of bringing the tip of the tool into contact with the workpiece, and a male screw rod being screwed into a female screw hole provided in a fixing member attached to the spindle, the tip being mounted on the workpiece. A screwing step of abutting the work table placed thereon, a separating step of rotating the male screw rod to separate the male screw rod from the working table by a predetermined dimension, and driving the main shaft in the axial direction thereof. Precise machining characterized by including a machining step for machining the workpiece with a machining tool, and a regulation step for regulating the movement of the spindle by contacting the tip of the male screw rod with the work table. Method.