JPH06708A - Drilling method and device - Google Patents

Abstract

PURPOSE:To eliminate or simplify a work to remove remaining chips and burrs by a method wherein, when a hole is formed in a work by means of a drill, chips integrally remaining at the opening edge of a hole and burrs produced at the opening edge of the hole are reliably cut away on the drill protrusion side of the work without being influenced by lowering of cutting quality of the drill. CONSTITUTION:A hole is formed through a work 35 by means of a drill 13 as a pressure pad 25 is butted against the surface of the work 35, through which the tip of the drill 13 is protruded, in a state to push back the pressure pad 25 by means of a thrust force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling method for drilling a workpiece by a drill, and a work fixture (Work F) used for the drilling method.
and a drilling device.

[0002]

BACKGROUND ART Generally, when a hole is drilled through a work piece, chips are not cut off and remain integrally on the opening edge of the hole on the surface of the work piece on the projecting side of the drill. As for the remaining chips, the material of the work piece is soft,
When it is rich in ductility and ductility, it is likely to occur in the case of soft metals such as mild steel, copper, copper alloys, aluminum, and aluminum alloys, and when the workpiece is small or spherical, The work of removing the remaining chips was extremely troublesome. Furthermore, when the drill was in an annealed state and the sharpness was reduced, the remaining chips became significantly more likely to occur.

[0003]

An object of the present invention is, when a hole is drilled through a workpiece with a drill, without being affected by the reduction in the sharpness of the drill, on the drill projecting side of the workpiece, the opening edge of the hole. A method of drilling that reliably separates all the chips remaining in the hole and avoids burrs at the opening edge of the hole, or reduces or simplifies the work of removing the remaining chips and burrs. , A work fixture used for the drilling method, and a drilling device.

[0004]

[Means corresponding to the problem and its action]
The method of drilling is to punch a hole through the workpiece with the drill while abutting the pressure pad against the surface of the workpiece where the tip of the drill is projected while pushing it back with a predetermined thrust force. On the projecting surface of the drill, the chips that remain integrally at the opening edge of the hole and burrs that occur at the opening edge of the hole, in particular, cap-shaped burs or lid-shaped burrs, are supported by the pressure pad while the drill It is about to be separated.

The present invention also provides that the work fixture used in the drilling method has a work set surface and is fixedly arranged on the table, and the workpiece can be supported on the work set surface. On the work fixture body, the guide bore formed in the work fixture body with an inner diameter larger than the drill diameter and formed on the work set surface, and the work set surface side, A work clamp located in relation to the guide bore on the work fixture body and capable of fixedly fastening the workpiece to the work set surface and a reciprocating slide on the guide bore. A pressure pad that is movably mated and abuts against the workpiece with a predetermined thrust force. The workpiece is fixed and the drill is placed in a rotating state, respectively, and the drill is used to drill a hole through the workpiece, and at that time, the opening of the hole at the drill projecting surface of the workpiece. This is a place where the drill is to separate the chips and burrs that are left integrally on the edge and burrs that occur at the opening edge of the hole, in particular, capsular burs and lid burrs, while supporting the pressure pad. .

Further, the present invention provides that the work fixture used in the drilling method has a work set surface and is fixedly supported by the chuck, and the work piece can be supported on the work set surface. A spindle type work fixture body, and a guide bore that is formed coaxially with the spindle type work fixture body by opening on the work set surface with an inner diameter larger than the drill diameter. A work clamp that is fixedly assembled to the chuck and that allows the work piece to be fixedly clamped to the work set surface and reciprocally slidably mated to the guide bore And a pressure pad that is abutted in a state of being pushed back by a predetermined thrust force. The non-rotating parts are respectively drilled through the hole in the workpiece with the drill, and at that time, the chips and the chips that remain integrally at the opening edge of the hole on the surface of the drill protruding of the workpiece. A burr generated at the opening edge of the hole, particularly a cap-shaped burr and a lid-shaped burr, is supported by the pressure pad, and the drill is allowed to separate the chips and burrs.

Still further, according to the present invention, a drilling device is
A table that supports the workpiece, a spindle that faces the table, is brought closer to the table, and is moved away from the table; and a gear box that rotates the spindle.
A drill fixedly supported on the spindle and a work fixture fixedly arranged on the table with a work set surface and capable of supporting the workpiece on the work set surface.・ A guide that is formed in the work fixture body by opening it in the work set surface with an inner diameter larger than the body and drill diameter
On the bore and its work set surface side, the guide
A work clamp located on the work fixture body in relation to the bore and capable of fixedly clamping the work piece to the work set surface and reciprocally slidable on the guide bore A work fixture assembled with a pressure pad that is fitted to the workpiece and is pushed back to the workpiece with a predetermined thrust force, the workpiece being fixed and the drill being rotated. Place it, drill it through the hole in the workpiece, and then,
While supporting the chips that remain integrally at the opening edge of the hole and burrs that occur at the opening edge of the hole, especially the cap-shaped burr and the lid-shaped burr, on the pressure pad of the workpiece. The drill is about to remove the chips and burrs.

Further, in the present invention, the punching device includes a chuck that is rotatably arranged on a head stock and supports a work piece, a chuck that is positioned facing the chuck, is brought close to the chuck, and is moved away from the chuck. A drill head, a drill that is fixedly supported by the drill head, and a workpiece set surface that is fixedly supported by the chuck and is capable of supporting the workpiece on the work set surface. Spindle type work fixture body, guide formed on the work set surface with an inner diameter larger than the drill diameter and coaxially formed on the spindle type work fixture body.
Bore fixedly attached to the chuck, and
A work clamp that enables the work piece to be fixedly fixed to the work set surface, and a state in which the work piece is reciprocally slidably fitted in the guide bore and is pushed back to the work piece with a predetermined thrust force. A work fixture assembled with a butted pressure pad, the workpiece in a rotating state, the drill in a non-rotating state, the drill drilling a hole in the workpiece, and At that time, chips that remain integrally at the opening edge of the hole and burrs that occur at the opening edge of the hole on the surface of the workpiece where the drill protrudes, especially capsular burrs and lid burrs, etc. It is about to let the drill separate the chips and burrs while supporting them on the pad.

[0009]

DESCRIPTION OF SPECIFIC EXAMPLES Specific examples of the drilling method of the present invention, the work fixture used in the drilling method, and the drilling device will be described below with reference to the drawings. FIG. 1 shows a specific example 10 of the drilling device of the present invention applied to the heat transfer tube drilling of a copper alloy multi-tube heat exchanger part 35 as a workpiece, and in this drilling device 10, the drilling device of the present invention is drilled. Example 20 of the work fixture used in the method was utilized to carry out the drilling method of the present invention. In particular, this drilling device 10
Has a large number of spindles 12, 12, 12, 12, ... And a drill 13, 1 is attached to the spindles 12, 12, 12, 12 ,.
, 13 are fixedly supported, and the gang head (not shown) is fixed, and the table 11 is moved upward to be assembled into a structure in which a large number of drilling operations are simultaneously performed. . Of course, the gang
The head is equipped with a gear box and the power of the electric motor is passed through the gear box to its spindle 12,1.
2, 12, 12, ... and transmitted to the main shafts 12, 12,
12, 12, ... Are rotated.

Further, the work fixture 20 used in the drilling device 10 is
It is fixedly arranged on the table 11 with a set face 22, and the heat exchanger part 35 is attached to the work piece.
A work fixture body 21 supported on the set surface 22 and a large number of guide bores 23, 23, 23, 23 formed in the work fixture body 21 by being opened in the work set surface 22. ... and on the side of the work set surface 22 thereof, arranged in the work fixture body 21 in relation to the large number of guide bores 23, 23, 23, 23, ..., and the heat exchanger parts thereof. 35 to the work set surface 22
Fixedly fixed to the work clamp 24 and the large number of guide bores 23, 23, 23, 23, ... It was assembled with a large number of pressure pads 25, 25, 25, 25, ...

The work fixture body 2
A clamp (1) is a tee head bolt positioned on the table 11 and fitted in the tee slot of the table 11 and a nut screwed to the bolt, as usual. It was fastened and fixed to the table 11 by means (not shown).

Further, this work fixture 20
Then, the many pressure pads 25, 25, 25,
25, ... are heat transfer tube holes 36, 3 in the heat exchanger part 35.
A large number of drills 13, 1 for drilling 6, 36, 36, ...
Since it was made in the sleeve where the tips of 3, 13, 13, ... are received correspondingly, the large number of guide bores 23,
23, 23, 23, ... are the drills 13, 13, 1
The outer diameter of 3, 13, ... Is opened on the work set surface 22 with an inner diameter larger than the so-called drill diameter, and the sleeves 25, 25, 25, 25 ,. It was formed on the work fixture body 21 where possible to guide.

A vice is used as the work clamp 24, and the vice 24 has a fixed jaw 26,
Movable jaw 27 and its fixed and movable jaws 2
It was composed of a threaded rod (not shown) that clamps the heat exchanger component 35 between 6 and 27. Of course, a chuck may be used as the work clamp 24.

The large number of pressure pads 25, 25,
25, 25, ... are harder than the heat exchanger part 35,
And the large number of drills 13, 13, 13, 13, ...
Made of a softer metal material into a sleeve, the multiple sleeves 25, 25, 25, 25, ... also use the tip for the work pressure surface 28, and the work pressure surface 28 is further It was cut into a tapered surface having an angle larger than the tip angle of the drill and recessed in the recess 29.

Further, each of the numerous sleeves 25, 25, 25, 25, ... Machined in this way,
The corresponding guide bores 23, 23, 23, 23, ...
Compression coil springs 30, 30, 3 arranged in
The compression coil springs 30, 30 are supported by 0, 30, ... And are pushed back by a predetermined thrust force.
, 30, 30, ..., Butt against the heat exchanger component 35. The predetermined thrust force is such that the drills 13, 13, 13, 13, ...
Immediately before the heat transfer tube holes 36, 36, 36, 36, ... Are penetrated into the heat transfer tube hole 36, and the heat transfer tube hole 36 is opened in the surface of the heat exchanger part 35 where the drill tip is projected. Chips that remain integrally at the opening edges of 36, 36, 36, ... Or their heat transfer tube holes 36, 36, 36, 3
A place where thin plate burrs, so-called lid burrs, which are generated at the opening edges of 6, are held without being released from the drills 13, 13, 13, 13 ,.
, As it passes through the heat exchanger part 35 and is further fed to its sleeves 25, 25, 25, 25 ,. , 13, 13, ... Escape from the drill 13, 13, 13, 13 ,.
5,25,25, ... Set so as to avoid cutting, in this case the drill 13,1 at a predetermined speed.
It was decided according to the thrust force required to send 3, 13, 13, ....

As such, the sleeves 25, 25, 2
.. are abutted against the heat exchanger part 35 in a state of being pushed back by a predetermined thrust force, so that the drills 13, 13, 13, 13 ,.
When the heat transfer tube holes 36, 36, 36, 36, ... Are pierced into the heat exchanger 5, the heat exchanger part 35 is not separated on the surface of the heat exchanger component 35 on the side where the drill projects , The chips that remain integrally at the opening edges of the heat transfer tube holes 36, 36, 36, 36, ... And the burrs formed at the opening edges of the heat transfer tube holes 36, 36, 36, 36 ,. 25, 25, 25, 25, ... are held in the initial outer shape of the heat exchanger component 35,
The chips are positively separated from the heat exchanger part 35, and the burrs are separated from the heat exchanger part 35 or left small in the heat exchanger part 35, while the drills 13, 13 , 13, 13, ... by cutting the sleeves 25, 25, 25, 25,
It is possible to avoid being damaged. Of course, the strength of the compression coil springs 30, 30, 30, 30, ... Corresponds to the predetermined thrust force. That is, the compression coil springs 30, 30, 30, 3
The strength of 0, ... is that the chips and burrs are the drill 1
3,13,13,13, ... are securely cut off and adjusted so that the drill 13,13,13,13, ... is not cut into the sleeve 25,25,25,25 ,. There is.

Next, the operation of the punching device 10 will be described with respect to the heat exchanger component 35. In advance, the work
The fixture 20 is positioned on the table 11 and clamped with bolt-nut clamps, and the work fixture 20 has its heat exchanger components 35 attached to the work fixture body 21. It is placed on the work set surface 22, clamped by its vise 24 and fixedly supported on the work set surface 22, so that it drives its electric motor and, via its gear box, it Spindle 12,1
2, 12, 12, ... Rotate the drill 13, 1
Rotate 3, 13, 13, ....

Next, the other electric motor is operated so that the table 11 is automatically fed upward at a constant speed by the other exercise machine.
In that way, when the table 11 is fed upward by the other electric motor at a predetermined speed, the heat exchanger part 3 set in the work fixture 20.
5 is drilled by the drills 13, 13, 13, 13, ....

As the table 11 is automatically fed, the drills 13, 13, 13, 13, ... Are penetrated through the heat exchanger part 35 by forming a large number of heat transfer tube holes 36, 36, 36, 36 ,. Immediately before the heat exchanger parts 35
On the drill protruding side of the heat transfer tube holes 36, 36,
Chips and burrs are integrally formed on the opening edges of 36, 36, ... Without being separated, but the chips and burrs that are left uncut are integrally formed.
The compression coil spring 30, 30, 30, 30,
Is held by the sleeves 25, 25, 25, 25, ... that are abutted against the heat exchanger component 35 and cut by the drills 13, 13, 13, 13 ,. The separated chips and burrs are separated and the sleeves 25, 25, 25, 25,
… Smoothly moved inside.

Further, the table 11 is automatically fed so that the drills 13, 13, 13, 13, ... Are provided in the heat exchanger part 35 with a large number of heat transfer tube holes 36, 36, 36 ,.
36, ... Is penetrated, and when the drill tip contacts its sleeve 25, 25, 25, 25, ..., The sleeve 25, 25, 25, 25 ,. It was avoided that the drills 13, 13, 13, 13, ... were pushed back by the thrust force of 13, ... and the drills 13, 13, 13, 13, ... were cut into the sleeves 25 and damaged.

The table 11 is continuously fed automatically. When the table 11 is fed to a predetermined position, it is automatically stopped and returned to its original position. In this way, when the heat exchanger tube 35 is drilled in the heat exchanger part 35 and then the heat exchanger part 35 is removed from the work fixture 20,
The chips and burrs are separated from the heat exchanger component 35 without leaving any residue, and after the boring process, the work of removing the chips and burrs usually performed on the heat exchanger component 35 is omitted. It was

FIG. 2 shows another embodiment 40 of the drilling device of the present invention applied to the heat transfer tube drilling of the above-mentioned copper alloy multi-tube heat exchanger part 35, and this drilling device 40. Then, another embodiment 45 of the work fixture used in the drilling method of the present invention was utilized to carry out the drilling method of the present invention. This punching device 40
Work Fixture 4 that was utilized for
5 has a work set surface 47 and its table 11
Fixedly arranged on and its heat exchanger part 35
And the work set surface 47 that supports the work set surface 47 on the work set surface 47.
Opened in the work fixture body 4
The guide bore 48 formed in 6 and the work set surface 47 side of the guide bore 48 in relation to the guide bore 48 in the work fixture body 46 and the heat exchanger component 35 The work clamp 24 fixedly fixed to the work setting surface 47 and the guide bore 48 are reciprocally slidably fitted to the work clamp 24 and pushed back to the heat exchanger component 35 by a predetermined thrust force. It was assembled with the applied pressure pad 49.

The work fixture body 4
6 was positioned on the table 11 and clamped and fixed to the table 11 with a clamp. Of course, the clamp is the clamp used for the work fixture body 21 described above.

In addition, this work fixture 45
Then, the pressure pad 49 is replaced by the heat exchanger component 3
Since the heat transfer tube holes 36, 36, 36, 36, ... are drilled in 5, the tips of the numerous drills 13, 13, 13, 13, ...
The guide bore 48 is formed in the work fixture body 46 with an inner diameter that allows the plate-shaped block 49 to be fitted together so that it can slide back and forth in the vertical direction.

The pressure pad 49 is harder than the heat exchanger component 35 and the drill 13,1.
The drill 13, which is made of a metal material softer than 3, 13, 13, ..., into the aforementioned plate-shaped block, and drills heat transfer tube holes 36, 36, 36, 36, ... In its heat exchanger part 35. A large number of depressions 52, 52, 52, 52, ... Corresponding to the number of 13, 13, 13 ,.
9 formed on the work pressure surface 50. in this case,
The depressions 52, 52, 52, 52, ... Have a large number of lands 51, 5 where the work pressure surface 50 of the plate-like block 49 is partially shaved off and left.
1, 51, 51, ... And a taper surface having an angle larger than the drill tip angle is formed at the opening edge, and the depressions 52, 52, 52, 52 ,. Chip drop hole 5 where it penetrates block 49
3, 53, 53, 53, ... Are correspondingly opened.

The plate-shaped block 49 is supported on the table 11 by a large number of compression coil springs 30, 30, 30, 30, ... And is pushed back by a predetermined thrust force to the heat exchanger. It was struck against the part 35. The predetermined thrust force is applied to the drill 13, 1
The heat exchanger parts 3, 13, 13, ... Where the drill tips are projected immediately before the heat exchanger parts 35 are penetrated through the heat transfer tube holes 36, 36, 36, 36 ,. The heat transfer tube holes 36, 36, 3 opened on the surface of 35
Chips that remain integrally at the opening edges of 6, 36, ... Or lid-shaped burrs that occur at the opening edges of the heat transfer tube holes 36, 36, 36, 36 ,.
Where the drills 13, 13, 13, 13, ... are held without being missed from the heat exchanger parts 3.
When it passes through 5 and is further sent to the plate-like block 49, the plate-like block 49 is inserted into the drill 13,
Escape from 3,13, ... the drill 13,13,13,
.. are set so as to avoid cutting into the plate-like block 49, in which case the thrust force required to feed the drills 13, 13, 13, 13, .. Was decided accordingly.

In this way, the plate-shaped block 49 is abutted against the heat exchanger component 35 while being pushed back by the predetermined thrust force, so that the drills 13, 1 are
, Are penetrated through the heat exchanger part 35 by forming heat transfer tube holes 36, 36, 36, 36, ..., On the surface of the heat exchanger part 35 on the drill-through side, The heat transfer tube holes 36, 36, 36, 3 without being separated
Chips that remain integrally at the opening edges of 6, and lid burrs formed at the opening edges of the heat transfer tube holes 36, 36, 36, 36, ... 35, the chips are reliably separated from the heat exchanger part 35, and the burr is separated from the heat exchanger part 35, or to the heat exchanger part 35. It remains small, but on the other hand, it is avoided that the drills 13, 13, 13, 13, ... Cut into the plate-like block and scratch the plate-like block 49. Of course, the strength of the compression coil springs 30, 30, 30, ... Was set corresponding to the predetermined thrust force. That is, the strength of the compression coil springs 30, 30, 30, ... Is such that the chips and burrs are the drills 13, 13, 13, 13 ,.
Be surely cut off, and the drill 13,13,
.. are adjusted to such an extent that the plate-shaped block 49 is not cut.

Next, the work fixture 45
The operation of the punching device 40 using the heat exchanger will be described for the heat exchanger part 35. In advance, the work fixture 45 is positioned on the table 11 and fixed by the clamp, and the work fixture 45 has the heat exchanger part 35 of the work fixture body 46. It is placed on the work set surface 47, clamped by the vise 24 and fixedly supported on the work set surface 47, so that it drives the electric motor and, via the gear box, it The spindles 12, 12, 12, 12, ... Are rotated to rotate the drills 13, 13, 13, 13 ,.

Next, another electric motor is driven to automatically feed the table 11 upward at a constant speed by another exercise machine.
In that way, when the table 11 is sent upward by the other electric motor at a predetermined speed, the heat exchanger part 3 set in the work fixture 45.
5 is drilled by the drills 13, 13, 13, 13, ....

As the table is automatically fed, the drills 13, 13, 13, 13, ...
When a large number of heat transfer tube holes 36, 36, 36, 36, ...
Chips and burrs are integrally formed at the opening edges of 6, and are not separated, but the chips and burrs that are left uncut and integrally are the compression coil spring 30. , 30, 30, ... Held by the plate-shaped block 49 abutting against the heat exchanger component 35, cut by the drills 13, 13, 13, 13 ,. And then
The separated chips and burrs were smoothly moved to the chip drop holes 53, 53, 53, 53, ....

Further, the table 11 is automatically fed so that the drills 13, 13, 13, 13, ... Are provided in the heat exchanger part 35 with a large number of heat transfer tube holes 36, 36, 36 ,.
When the drill block 36 is penetrated and the drill tip comes into contact with the plate block 49, the plate block 49
Is pushed back by the thrust force of the drills 13, 13, 13, 13, ... and escapes, and the drills 13, 13, 13,
It was avoided that 13, ... Cut into the plate-shaped block 49 and scratched.

The table 11 is continuously fed automatically. When the table 11 is fed to a predetermined position, it is automatically stopped and returned to its original position. In this way, after the heat exchanger tube 35 is drilled in the heat exchanger part 35, the heat exchanger part 35 is removed from the work fixture 45,
The chips and burrs are separated from the heat exchanger component 35 without leaving any residue, and after the boring process, the work of removing the chips and burrs usually performed on the heat exchanger component 35 is omitted. It was

FIG. 3 shows another embodiment 60 of the drilling device of the present invention applied to the drilling of a spherical part 95 as a workpiece. Of course, this drilling device 60 is used in the drilling method of the present invention. Another embodiment 70 of the work fixture is utilized to carry out the drilling method of the present invention. The punching device 60 includes a base (not shown), a table 61 movably supported on the base, and a column (not shown) adjacent to the table 61 and fixedly arranged on the base. ), A slide head (not shown) supported by the column and guided vertically above the table 61, a single main shaft (not shown) supported by the slide head, and an electric motor (not shown). Gear box (not shown) directly connected to the main shaft, and a drill 6 fixedly supported on the main shaft.
2 and Work Fixture 70.

The work fixture 70, which has been utilized in the punching device 60, is fixedly arranged on the table 61 with the work set surface 52, and the spherical part 95 is attached. A work fixture body 71 supported by the work set surface 72, and a guide bore formed in the work fixture body 71 by opening in the work set surface 72 with an inner diameter larger than the drill diameter. 73, and above the work set surface 72, is disposed on the work fixture body 71 in relation to the guide bore 73, and the spherical part 95 is fixed to the work set surface 72. Work clamp 7
4 and a pressure pad 75 fitted to the guide bore 73 so as to be reciprocally slidable and abutted against the spherical part 95 in a state of being pushed back by a predetermined thrust force,
The pressure pad 75 was assembled to include a stopper 76 for suppressing the protrusion of the pressure pad 75.

The work fixture body 7
No. 1 was positioned on the table 61 and fastened and fixed to the table 61 with a bolt-nut (not shown).

A vice is used as the work clamp 74, and the vice 74 is attached to the fixed jaw 78 protruding from the work set surface 72 of the work fixture body 71 and the fixed jaw 78. A movable jaw 79 that is moved closer and further away, a screw support stand 80 that is projected in relation to the fixed and movable jaws 78, 79 on the work set surface 72 of the work fixture body 71, and the screw A bolt 8 that is screwed into a screw hole 81 of a support stand 80 and has its tip connected to its movable jaw 79.
It consisted of 2 and. Then, in this vise 74, the spherical part 95 is sandwiched between the fixed and movable jaws 78 and 79, and by turning the bolt 82, it is tightened between the fixed and movable jaws 78 and 79 to set the work set. The surface 72 can be fixedly fastened. Of course, the bolt 82 can be replaced with a threaded rod with a handle.

As the pressure pad 75, a sleeve made of alloy tool steel is used, and the sleeve 75 uses the tip for the work pressure surface 83, and the work
The pressure surface 83 is further cut into a tapered surface having an angle larger than the tip angle of the drill and is recessed in the recess 84,
Further, a long hole 85 is formed at a predetermined position.
After being so machined, the sleeve 75 is
It was manufactured by quenching to a hardness harder than the spherical part 95 and softer than the drill 62. Of course, this long hole 8
5 inserts the tip of its stopper 76, and
The length and width of the sleeve 75 which is slidably slid back and forth in the guide bore 73 are regulated by the length and width, and the protrusion of the sleeve 75 is projected to the work set surface 72. The sleeve 75 was punched in the sleeve 75 at a position where it was suppressed.

The sleeve 75 has a guide
Fit into bore 73, and its guide bore 7
3 is supported by a compression coil spring 87, which is secured to a spring seat 86 corresponding to the bottom of 3,
Then, it was abutted against the spherical part 95 in a state of being pushed back by a predetermined thrust force. Its predetermined thrust force,
That is, the strength of the compression coil spring 87 is
The drill 62 is the same as in the case of the plate block 49 described above.
Was decided according to the thrust force required to send.

As the stopper 76, a screw rod having a pin 88 formed at its tip is used.
The work fixture body 71 is screwed into a threaded hole 77 which is drilled and threaded at a predetermined position, the pin 88 is inserted into the long hole 85 of the sleeve 75, and the nut 89 is used to insert the work fixture.
It was stopped by the body 71.

Next, the operation of the punching device 60 will be described for the spherical part 95. First, the work fixture 70 is positioned on the table 61 and secured with bolts and nuts, and the work fixture
The fixture 70 has its spherical part 95 placed on the work set surface 72 of its work fixture body 71, clamped with its vise 74, and fixedly supported on the work set surface 72. Is set and set.

As such, the spherical part 95 is moved by the work fixture 70 to the table 61.
Once set on, the punching device 60 will
The electric motor is operated, the main shaft is rotated by the electric motor through the gear box to rotate the drill 62, and thereafter, the drill 62 is operated in the same manner as a normal electric motor direct connection type upright drilling machine. It was

In this drilling device 60 as well as in the above-described drilling devices 10 and 40, immediately before the drill 62 penetrates the spherical part 95 by making a hole 96, the drilling side of the spherical part 95 is exposed. At the opening edge of the hole 96, the cap-shaped chips 97 are integrally formed without being separated as shown in FIG. 4, but the cap-shaped chips 97 which are not separated and are integrally left. Is held by its compression coil spring 87 in its sleeve 75 abutting its spherical part 95 and its drill 62
It was cut off from the spherical part 95. Further, the drill 62 is further fed to the spherical part 95.
When the drill tip contacts the sleeve 75, the sleeve 75 is
The thrust force of the drill 62 was used to push it back and escape, and it was avoided that the drill 62 would cut into the sleeve 75 and damage it.

FIGS. 5 and 6 show a further embodiment 100 of the punching device of the invention applied to the drilling of a spherical part 95 as a workpiece, and of course, the drilling device 100 is of the invention. Still another embodiment 110 of the work fixture used in the drilling method was utilized to carry out the drilling method of the present invention. The punching device 100 includes a bed (not shown), an electric motor (not shown), a gear box (not shown) and the like, and a head stock fixedly arranged on the bed (see FIG. (Not shown), rotatably disposed on the head stock and coupled to the gear box, and chuck 101 supporting the spherical part 95, reciprocally disposed on the bed and on the head stock. A carriage (not shown) that is moved closer and further away,
And a drill head (not shown) or the like, which is fixedly positioned and supported on the carriage facing the chuck 101, and is brought close to and away from the chuck 101 with the carriage. It is assembled into a lathe structure and the drill 62 is fixedly supported on its drill head and used, and its work fixture 110 is its spherical part 95.
Was fixedly attached to the chuck 101.

The work fixture 110 utilized in the punching device 100 has a work set surface 112 and is fixedly supported by the chuck 101, and the spherical part 95 is attached to the work fixture. Spindle type work fixture body 111 which can be supported on the work set surface 112 and its drill 6
Work set surface 11 with an inner diameter larger than the outer diameter of 2
2 and a guide bore 113 coaxially formed in the spindle-shaped work fixture body 111, and fixedly assembled to the chuck 101, and the spherical part 95 of the work set. A work clamp 114 fixedly fixed to the surface 112 and a pressure pad which is reciprocally slidably fitted to its guide bore 113 and abutted against the spherical part 95 while being pushed back by a predetermined thrust force. 115 and a stopper 116 for suppressing the protrusion of the pressure pad
It was assembled including and.

The work fixture body 1
11 is manufactured in a spindle shape which makes the chuck 101 easy to grip, and the spherical part 95 needs to be appropriately separated from the chuck 101 and set in front of the chuck 101 during drilling. In the axial direction, a butt flange 117 is formed on the outer peripheral surface that is located at a predetermined distance from the tip, and a structure is adopted that makes it easy to set the spherical component 95 on the chuck 101. Further, in this spindle type work fixture body 111, the tip end surface was used as the work set surface 112, and was processed into a tapered surface. In particular, the work set surface 112 was machined into an inclined surface forming an angle of 45 degrees from the axis to finish the tapered surface. Further, this spindle type work fixture body 111 was drilled so that a pin could be driven into a predetermined position.

The work clamp 114 is a ball clamp.
Clamping block 11 with chuck holes 119
8. Tee head bolt 121 for removably and fixedly fastening the clamping block 118 to the chuck 101, and the Tee head bolt 1
It is composed of a nut 122 that is screwed to 21. Of course, the ball chuck hole 119 is formed by the spherical part 9
The inner diameter was determined where 5 was retained.

In addition, the clamping block 118
Is coaxially connected to the ball chuck hole 119 and is fitted to the tip portion of the spindle-shaped work fixture body 111.
Is formed to facilitate the centering when the chuck 101 is assembled.

As the pressure pad 115, a sleeve made of alloy tool steel is used, and the sleeve 115 uses the tip for the work pressure surface 123, and the work pressure surface 123 is further 60 degrees from the axis. A dent 124, which was machined into a sloped surface and finished into a tapered surface, was recessed, and further, a pair of elongated holes 125 were drilled at predetermined positions. After being so machined, the sleeve 115 has its spherical parts 9
It was manufactured by quenching to a hardness harder than 5 and softer than the drill 62. Of course, the pair of long holes 125
The stopper 116 is inserted into the guide bore 113, and the sleeve 115 slid back and forth in the guide bore 113 is restricted in length and width so as to restrict the movement amount and rotation of the sleeve 115.
Then, the sleeve 115 projected at the work set surface 112 was punched in the sleeve 115 at a position where the protrusion of the sleeve 115 was suppressed.

The sleeve 115 is also fitted into its guide bore 113 and, with the pin 127, its spindle-shaped work fixture body 11.
Compression coil spring 1 where it was prevented from coming off
25, and was struck against the spherical part 95 while being pushed back with a predetermined thrust force. The predetermined thrust force, ie, the strength of the compression coil spring 126, was determined according to the thrust force required to feed the drill 62.

A straight pin is used as the stopper 116, and the stopper 116 is inserted into a pair of long holes 125 of the sleeve 115 fitted in the guide bore 113, so that the spindle-shaped work fixture body is formed. I was struck by 111.

Next, the operation of the punching device 100 will be described for the spherical part 95. First, the spindle-shaped work fixture body 111, in which the pressure pad 115 is fitted in the guide bore 113 in advance, is engaged with the chuck jaws and fixedly supported on the chuck 101, while the work piece
The spherical part 95 is previously fitted and placed in the ball chuck hole 119 of the clamp 114, and the tip portion of the spindle-shaped work fixture body 111 is fitted in the centering hole 120, so that the work clamp 114 is fixed. Attached to the chuck 101, and tightened with the T-head bolts-nuts 121 and 122, the work clamp 114 is attached to the chuck 10.
It is fixed at 1. As such, its work clamp 1
When 14 is clamped to its chuck 101, its spherical part 95 is fixedly supported and set on the work setting surface 112 of its spindle-shaped work fixture body 111.

Next, the punching device 100 operates its electric motor, and rotates the chuck 101 with the electric motor through the gear box to put the spherical part 95 in a rotating state. Then, the carriage 62 is moved onto the bed so as to approach the head stock, and the spherical part 95 is drilled with the drill 62.

In this drilling device 100 which carries out drilling in such a manner, similarly to the above-mentioned drilling device 60, when the drill 62 is about to be drilled through the spherical component 95 by drilling a hole 96, the spherical component As shown in FIG. 4, a cap-shaped chip 97 is integrally formed without being cut off at the opening edge of the hole 96 on the drill protruding side of 95, but it is left uncut. The cap-shaped chips 97 are the compression coil spring 1
It was held at its sleeve 115, which was abutted against its spherical part 95 at 26, cut with its drill 62 and separated from its spherical part 95. Also, when the drill 62 is further fed and penetrates the spherical part 95 through the hole 96, and when the drill tip contacts the sleeve 115, the sleeve 115 is pushed back by the thrust force of the drill 62. It was avoided that the drill 62 cuts into the sleeve 115 and scratches it.

The above-described punching device 10, 40, 60,
In 100, the pressure pads 25, 75, 115
Is embodied in a sleeve, and the pressure pad 49 is embodied in a plate-shaped block.
5, 49, 75, 115 can be further modified in various ways and can be embodied as pins, plungers, etc., and in such a case, the compression coil springs 30, 87, 126 are Alternatively, it can be replaced with hydraulic pressure. Also, the pressure pads 25, 49,
At 75, recesses 29, 52, 84 for receiving the drill tip are formed in the work pressure surfaces 28, 50, 83, and the recesses 29, 52, 84 are tapered with an angle larger than the drill tip angle. As described above, the tapered surface is set to an angle slightly larger than the drill tip angle, specifically, an angle larger than 2 to 3 degrees as in the drilling device 100. Is enough. In addition, the pressure pad 25,
49,75,115 are harder than its heat exchanger part 35 and spherical part 95, and its drill 13,1
Although described as having a hardness softer than 3, 13, 13, ..., And 62, the pressure pads 25, 49, 7 can be replaced if they are exchanged after each drilling process.
A material having a hardness of the work piece or a material hardened to the hardness can be used as the material 5,115, and the pressure pad 25, 49, 75, 115 is harder than the work piece. Any material or material that is hardened to its hardness is sufficient.

In addition, the above-described punching device 60, 100
Then, the means for preventing the pressure pads 75 and 115 from splashing out are the long holes 85 and 125 and the stoppers 76 and 1.
16, especially the stopper 76 is described as a threaded rod and the stopper 116 is described as a pin, however, the pop-out restraining means can be modified, for example, the stoppers 76, 116 can be provided in the sleeve thereof. It is replaced by a flange projecting around the perimeter of 75,115, and in that case its slot 85,125 is its guide bore 7
It suffices if the inner diameter can be widened so that 3,113 has a step that allows the flanges to be fitted together.

As is apparent from the embodiments of the present invention described with reference to the drawings as described above, those skilled in the art who have ordinary knowledge in the technical field to which the present invention pertains have the following contents of the present invention. In order to achieve the object of the invention, it is easy to obtain a mode that is derived from the technical essence of the invention, which is essential for the formation of the invention and is the nature of the invention, and which is objectively recognized as being inherent. Is embodied in.

[0057]

Benefits of the Invention As will be understood from the above, the drilling method of the present invention is such that the pressure pad is abutted against the surface of the workpiece from which the tip of the drill is ejected while being pushed back by a predetermined thrust force. Since it is about to drill a hole in the workpiece by the method of the present invention, when the hole is drilled in the workpiece by the drill, the opening of the hole in the drill projecting surface of the workpiece is opened. Chips that remain integrally on the edge and burrs that occur at the opening edge of the hole, especially cap and burr, are separated by the drill while being supported by the pressure pad, and the chip and The deburring operation is eliminated or simplified, which is very useful and practical for drilling through holes.

Further, the work fixture used in the drilling method of the present invention has a work set surface and is fixedly arranged on the table, and the workpiece can be supported on the work set surface. On the work fixture body, the guide bore formed in the work fixture body with an inner diameter larger than the drill diameter and formed on the work set surface, and the work set surface side, A work clamp located in relation to the guide bore on the work fixture body and capable of fixedly fastening the workpiece to the work set surface and a reciprocating slide on the guide bore. A pressure pad that is movably mated and abuts against the workpiece with a predetermined thrust force. Then, in the work fixture used in the drilling method of the present invention, the workpiece is fixed, the drill is placed in the rotating state, respectively, and the drill is used to drill a hole through the workpiece, and At that time, on the drill projecting surface of the workpiece, the chips that remain integrally at the opening edge of the hole and burrs that occur at the opening edge of the hole, in particular, caps and burrs, are formed on the pressure pad. It is separated by the drill while being supported by
The removal of the chips and burrs after drilling is eliminated or simplified, which is very useful and practical for drilling through.

Further, the work fixture used in the drilling method of the present invention has a work set surface and is fixedly supported by the chuck, so that the workpiece can be supported on the work set surface. A spindle-type work fixture body, and a guide bore that is formed coaxially in the spindle-type work fixture body with an inner diameter larger than the drill diameter and is opened in the work set surface. A work clamp, which is fixedly assembled to the chuck and which allows the work piece to be fixedly clamped to the work set surface, and reciprocally slidably fitted to the guide bore, is attached to the work piece. Since it includes a pressure pad that is abutted while being pushed back by a predetermined thrust force, it is used in the drilling method of the present invention. In the work fixture, the workpiece is placed in a rotating state and the drill is placed in a non-rotating state, and the drill is used to drill a hole in the workpiece, and at that time, the workpiece is protruded. At the surface, chips that remain integrally at the opening edge of the hole and burrs that occur at the opening edge of the hole, particularly cap and burr, are separated by the drill while being supported by the pressure pad, The removal of the chips and burrs after drilling is eliminated or simplified, which is very useful and practical for drilling through.

Furthermore, the punching device of the present invention includes a table for supporting a workpiece, a spindle positioned facing the table, brought closer to the table, and further away from the table, and a gear box for rotating the spindle. And a drill fixedly supported on the spindle and a work piece having a work set surface fixedly arranged on the table and capable of supporting the workpiece on the work set surface. Fixture body, a guide formed in the work fixture body by opening on the work set surface with an inner diameter larger than the drill diameter
On the bore and its work set surface side, the guide
A work clamp located on the work fixture body in relation to the bore and capable of fixedly clamping the work piece to the work set surface and reciprocally slidable on the guide bore In the drilling device of the present invention, the workpiece is fixed because it includes a work fixture assembled with a pressure pad that is fitted to the workpiece and pushed back to the workpiece with a predetermined thrust force. , Placing each of the drills in a rotating state and drilling a hole through the work piece with the drill, and at that time, at the drill projecting surface of the work piece, the cutting remains integrally at the opening edge of the hole. Any burrs on the debris or the opening edge of the hole, especially the cap and lid burrs, are separated by the drill while being supported by the pressure pad. Is its or easier the chips and remove burrs operation after drilling is eliminated, as a result, it is very useful and practical for drilling to be penetrated.

Further, the drilling device of the present invention includes a chuck rotatably arranged on the head stock and supporting a workpiece, and a drill positioned facing the chuck, brought close to the chuck, and moved away from the chuck. A head, a drill fixedly supported by the drill head, and a work set surface, fixedly supported by the chuck, and capable of supporting the workpiece on the work set surface Spindle type work fixture body, which has an inner diameter larger than the drill diameter
A guide bore that is open in the set face and is coaxially formed in the spindle-shaped work fixture body, fixedly assembled to the chuck, and the workpiece fixed to the work set face. Work clamp that can be fastened to the work piece, and a pressure piece that is reciprocally slidably fitted in the guide bore and abutted against the work piece with a predetermined thrust force.
Since it includes a work fixture assembled with a pad, in the drilling device of the present invention, the workpiece is placed in a rotating state, the drill is placed in a non-rotating state, and the drill penetrates the workpiece. Drilling, and at that time, chips that remain integrally at the opening edge of the hole and burrs that occur at the opening edge of the hole, especially capsular burrs and lid burrs, at the drill projecting surface of the workpiece, It is supported by the pressure pad and cut off by the drill, eliminating or simplifying the removal of chips and burrs after drilling, which makes it very useful and practical for drilling through Target.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a specific example of a hole forming device of the present invention applied to heat transfer tube hole processing of a copper alloy multi-tube heat exchanger part.

FIG. 2 is a partial cross-sectional view showing another specific example of the hole punching device of the present invention applied to heat transfer tube hole processing of a copper alloy multi-tube heat exchanger part.

FIG. 3 is a partial cross-sectional view showing another specific example of the punching device of the present invention applied to punching a spherical component.

4 is a cross-sectional view of a spherical component that has been drilled by the drilling device shown in FIG.

FIG. 5 is a partial cross-sectional view showing another specific example of the boring device of the present invention applied to boring a spherical component.

6 is a sectional view showing a partially enlarged view of the punching device shown in FIG.

[Explanation of symbols]

 11 Table 12 Spindle 13 Drill 20 Work Fixture 21 Work Fixture Body 23 Guide Bore 24 Work Clamp 25 Precious Pad (Sleeve) 45 Work Fixture 46 Work Fixture Body 48 Guide Bore 49 Precious Pad (Plate Block) 70 Work Fixture 71 Work Fixture Body 73 Guide Bore 74 Work Clamp 75 Precious Pad (Sleeve) 110 Work Fixture 111 Work Fixture Body 113 Guide Bore 114 Work Clamp 115 Pressure Pad (Sleeve)

Claims (35)

[Claims] 1. A drilling method in which a pressure pad is abutted against the surface of a work piece from which the tip of the drill is projected in a state of being pushed back by a predetermined thrust force while the work piece is drilled by the drill. 2. A work fixture body having a work set surface fixedly arranged on a table and capable of supporting a workpiece on the work set surface, and a work diameter larger than a drill diameter. A guide bore formed in the work fixture body at an inner diameter and formed in the work set surface, and the work fixture body in relation to the guide bore on the work set surface side. And a work clamp that allows the work piece to be fixedly fastened to the work set surface, and is reciprocally slidably fitted in the guide bore to provide a predetermined thrust force to the work piece. Work fixture used for drilling methods, including a pressure pad that is abutted while being pushed back by. 3. The work fixture used in the drilling method of claim 2, wherein the pressure pad is harder than the workpiece. 4. The work fixture used in the drilling method of claim 2, wherein the pressure pad is harder than the workpiece and softer than the drill. 5. The work fixture used in the drilling method of claim 2, wherein the pressure pad is abutted against the workpiece with a compression spring. 6. The work fixture used in the drilling method of claim 2, wherein the pressure pad is hydraulically abutted against the workpiece. 7. The pressure pad forms a recess in the work pressure surface for receiving a drill tip, and the recess is recessed in a tapered surface having an angle greater than the drill tip angle. Work fixture used in the drilling method described in. 8. The work fixture used in the drilling method according to claim 2, wherein the pressure pad is formed on a sleeve. 9. The work fixture used in the drilling method according to claim 2, wherein the pressure pad is formed in a plate-shaped block. 10. The work fixture used in the drilling method according to claim 2, wherein the pressure pad is formed in a plate-shaped block having a depression. 11. The work fixture used in the drilling method according to claim 2, wherein the pressure pad is formed in a plate-shaped block with holes. 12. A spindle type work fixture body having a work set surface fixedly supported by a chuck and capable of supporting a work piece on the work set surface, and a drill diameter rather than a drill diameter. With a large inner diameter, the spindle type work
A guide bore coaxially formed in the fixture body, and a work clamp fixedly assembled to the chuck and enabling the work piece to be fixedly fastened to the work set surface, A work fixture used in a drilling method, comprising: a pressure pad that is reciprocally slidably fitted in the guide bore and abutted against the workpiece while being pushed back by a predetermined thrust force. 13. The work fixture used in the drilling method of claim 12, wherein the pressure pad is harder than the workpiece. 14. The work fixture used in the drilling method of claim 12, wherein the pressure pad is harder than the workpiece and softer than the drill. 15. The work fixture used in the drilling method of claim 12, wherein the pressure pad is abutted against the workpiece with a compression spring. 16. The work fixture used in the drilling method of claim 12, wherein the pressure pad is hydraulically abutted against the workpiece. 17. The pressure pad forms a recess in the work pressure surface for receiving a drill tip, and
The work fixture used in the drilling method according to claim 12, wherein the recess is recessed by a tapered surface having an angle larger than the drill tip angle. 18. The work fixture used in the drilling method of claim 12, wherein the pressure pad is formed on a sleeve. 19. A table for supporting a work piece, and a table positioned so as to face the table and brought close to the table,
And, the main shaft to be moved away, the gear box for rotating the main shaft, the drill fixedly supported by the main shaft, the work set surface, and the fixedly arranged on the table, and A work fixture body that allows a work piece to be supported on its work set surface, and a guide bore formed in the work fixture body that is opened in the work set surface with an inner diameter larger than the drill diameter. , A work clamp located on the work set surface side in relation to the guide bore in the work fixture body, and allowing the workpiece to be fixedly fastened to the work set surface , And the guide bore so as to be slidable back and forth and pushed back to the workpiece with a predetermined thrust force. Drilling apparatus comprising a work fix Chua assembled in devoted Puresha pad. 20. The punching device of claim 19, wherein the pressure pad is harder than the workpiece. 21. The pressure pad is harder than the workpiece and softer than the drill.
A drilling device according to item 9. 22. The punching device of claim 19, wherein the pressure pad is abutted against the workpiece with a compression spring. 23. The drilling device of claim 19, wherein the pressure pad is hydraulically abutted against the workpiece. 24. The pressure pad forms a recess in the work pressure surface for receiving a drill tip, and
20. The drilling device according to claim 19, wherein the recess is recessed by a tapered surface having an angle larger than the drill tip angle. 25. The punching device of claim 19, wherein the pressure pad is formed on the sleeve. 26. The punching device according to claim 19, wherein the pressure pad is formed in a plate-shaped block. 27. The punching device according to claim 19, wherein the pressure pad is formed in a plate-shaped block having a depression. 28. The punching device according to claim 19, wherein the pressure pad is formed in a plate-shaped block with a hole. 29. A chuck rotatably disposed on a head stock to support a workpiece, a drill head positioned facing the chuck, brought closer to the chuck, and further away from the chuck, and the drill head. Fixedly supported on the chuck and a spindle type work fixture which has a work set surface and is fixedly supported on the chuck and enables the work piece to be supported on the work set surface. Body, guide bore formed in the work set surface with an inner diameter larger than the drill diameter and coaxially formed in the spindle type work fixture body, fixedly assembled to the chuck, and A work clamp that allows the work piece to be fixedly clamped to the work set surface, and
Workpiece assembled with a pressure pad that is reciprocally slidably fitted in the guide bore and abutted against the workpiece with a predetermined thrust force.
A drilling device including a fixture. 30. The punching device of claim 29, wherein the pressure pad is harder than the workpiece. 31. The pressure pad is harder than the workpiece and softer than the drill.
A drilling device according to item 9. 32. The punching device of claim 29, wherein the pressure pad is abutted against the workpiece with a compression spring. 33. The punching device of claim 29, wherein the pressure pad is hydraulically abutted against the workpiece. 34. The pressure pad forms a recess in the work pressure surface for receiving a drill tip, and
30. The drilling device according to claim 29, wherein the recess is recessed by a tapered surface having an angle larger than the drill tip angle. 35. The punching device of claim 29, wherein the pressure pad is formed on the sleeve.