JPS6036905B2 - Inner surface super finishing attachment for drilling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an internal superfinishing attachment for a drilling machine.

Conventionally, precision hole processing equipment includes internal grinding machines, jig grinding machines, honing machines, super finishing machines, lapping machines, etc., but these machines are expensive and not common.

Therefore, the present invention aims to enable super-finishing and lapping processing by simply attaching a simple attachment to the most common and inexpensive machine tool drilling machine, and to obtain low-cost, high-precision hole drilling. Its purpose is to provide an inner surface superfinishing attachment for use. An embodiment of the present invention will be described below based on the accompanying drawings. First, the structure of the mounting part of a commercially available drilling machine will be briefly described. Reference numeral 1 denotes an immovable drilling machine body, and a slide quill 2 is provided in a bore la inside thereof so as to be slidable in the vertical direction. 3 is the pole board itself!
It meshes with a rack gear 4 rotatably provided.

Reference numeral 5 denotes a main shaft which is fitted with iron so as to play in the bore la of the pole board main body 1 and the bore 2a of the slide quill 2. so that it can move in unison with 2,
Moreover, it is rotatably provided via bearings 7 and 8.

A tapered bore 5a is formed at the lower tip of the main shaft 5. Reference numeral 9 denotes a tool such as a drill, the upper end of which is a tapered projection ga.

Therefore, if you want to use it as a drilling machine, you just need to attach this drill 9 to the main shaft 5, and if you want to use it for other purposes, you can remove this drill 9 and provide various attachments as described below. All you need to do is install a super finishing tool.

The present invention is a novel and progressive approach to this point. Next, the configuration of an embodiment of the attachment 10, which is a main part of the present invention, will be described in detail.

Reference numeral 11 denotes an attachment mounting member, the upper end of which is a tapered projection 11a, and the lower end of which is provided with a slide hole 12.

A keyway 12a is formed in the slide hole 12 of the attachment member 11. 13 is a tool mounting member, and as shown in FIG. 3, the upper side thereof is a small diameter sliding shaft portion 13.
a, the middle part thereof becomes a large folding part 13b, and the lower part thereof becomes a tapered protruding part 13c.

A cam groove 14 is provided in the large diameter portion 13b of the tool mounting member 13.
is formed. The cam groove 14 is provided in the large portion 13b of the tool mounting member 13 in such a manner that, when developed, recesses 14a and protrusions 14b alternately and regularly appear repeatedly, as shown in FIG. Further, the small sliding shaft portion 13a of the tool mounting portion 13 has a key groove 15 formed on its outer periphery. The tool mounting part village 13 is
The small diameter sliding shaft portion 13a is slidably inserted into the slide hole 12 of the attachment mounting member 11. At this time, keys 16 are provided in the key groove 12a of the slide hole 12 and the key groove 15 of the small diameter sliding shaft portion 13a, as shown in FIGS. 2 and 5. Therefore, the attachment mounting member 11 and the tool mounting member 13 are integrated in the rotational direction, and are attached to each other so that they can move relative to each other while being guided by the key 16 in the axial direction. Reference numeral 17 denotes an attachment surrounding member, and a bolt 18 is screwed into the upper annular protrusion 17a, a large through hole 19 is formed in the center thereof, and a through hole 20 is further formed in the flange portion 17b below the bolt 18. There is.

A bolt 21 is inserted into the through hole 20, and a nut 2 is inserted into the bolt 21 so as to sandwich the flange portion 17a.
2 is screwed on. A cam follower 23 is fixed to the head of the bolt 21 and is configured to constantly engage with the cam groove 14 of the work odor mounting member 13. In order to attach the attachment 10 having such a configuration to the main shaft 5 of a drilling machine as shown in FIG. Strongly insert the portion 11a into the tapered bore 5a of the main shaft 5, and then slide the slide quill 2.
The lower tip 2b of the attachment surrounding member 17
When the bolt 18 provided on the upper annular protrusion 17a is guided deeply into the upper annular protrusion 17a and then moved forward, the attachment mounting member 11 and the attachment enclosing part village 17 are integrated so as not to move. connected to.

Further, the structure of another modified embodiment of the attachment 10', which is the essential part of the present invention, will be explained in detail.

Reference numeral 11' designates an attachment mounting member, the upper end of which is a tapered protrusion 11'a, and the lower end of which is provided with a slide hole 12'.

Slide hole 12' of this attachment mounting member 11'
A keyway 12'a is formed in the. Reference numeral 13' denotes a tool mounting member, and as shown in FIG. 3, the upper side thereof becomes a small sliding shaft part 13'a, the middle thereof becomes a large diameter part 13'b, and the lower part thereof becomes a tapered protruding part 13'. c.

A cam groove 14' is formed in the large section 13'b of the work odor mounting member 13'. When this cam groove 14' is expanded, as shown in FIG.
The large-diameter portion 13'M of the tool mounting member 13' is provided such that "b" is alternately and regularly repeated. Also, the small diameter sliding shaft portion 13 of the work odor mounting member 13'
'a has a keyway 15' formed on its outer periphery.
The tool mounting member 13' has a small sliding shaft portion 13'a.
However, the slide hole 1 of the attachment mounting member 11'
2'. At this time, a key 16' is provided in the key groove 12'a of the slide hole 2' and the key groove 15' of the small diameter sliding shaft portion 13'a, as shown in FIG. For this reason, the attachment mounting member 11'
and the tool mounting member 13' are integrated in the rotational direction,
It is axially guided by the key 16' and assembled so as to be relatively movable. Reference numeral 17' denotes an attachment surrounding member, whose upper cover 24' and annular protrusion 17'a are fixed by bolts 25', and bolts 18 are attached to the annular protrusion 17'a.
' are attached, large through holes 19', 19' are formed in the center thereof and the center of the lid part 24', and further a through hole 20' is formed in the flange part 17'b' below. There is.

A bolt 21' is inserted into the through hole 20', and a nut 22' is screwed onto the bolt 21' so as to sandwich the flange portion 17b. A cam follower 23' is fixed to the head of the bolt 21' and is configured to constantly engage with the cam groove 14' of the tool mounting section 13'.

Further, 26', 27', and 28' are bearings provided between the attachment mounting member 11r, the annular protrusion 17'a of the attachment surrounding member 17', and the lid 24'. In order to attach the attachment 10' having such a configuration to the main shaft 5 of a drilling machine as shown in FIG.
It is only necessary to first remove the drill 9 from the main shaft 5 and then forcefully insert the tapered protrusion 11'a of the attachment mounting member 11' into the tapered bore 5a of the main shaft 5.

Here, the function of the bolt 18' screwed onto the annular protrusion 17'a of the attachment surrounding member 17' will be explained. In particular, the attachment surrounding member 17 is directly connected to the bolt 18 with respect to the slide quill 2 of the pole board. If the bolts 18' are not tightened, the bolts 18' support the drilling machine body 1 to tighten the attachment surrounding member 1.
The cam follower 23' fixed to the flange portion 17'b serves to vibrate the tool mounting member 13' vertically.

Incidentally, numeral 29 shown in FIG. 6 is a superfinishing tool such as a diamond reamer, which is composed of a mounting part 29a, a guide part 29b, a finishing part 29c, a roughing part 29d, and a pilot part 29e.

This tool 29 connects the mounting portion 29a to the work odor mounting member 13.
All you have to do is firmly insert it into the tapered protrusion 13c. In addition, the workpiece has a machining hole 31 up to three rivers.
In the above configuration, the operation of the attachment 10 according to the embodiment of the present invention will be explained first.

In FIG. 6, when the attachment mounting member 11 is rotated in a predetermined direction by the main shaft 5, the tool mounting member 13 is rotated together via the key 16; Since the cam follower 23 attached to the immovable attachment surrounding member 17 is engaged with the cam groove 14, it is forcibly guided by the shape of the cam groove 14, and the small sliding shaft portion 13a is The attachment mounting member 10 slides in the slide hole 12 vertically in a so-called vibrating manner. As a result, the tapered protrusion 13c of the tool mounting member 13
At the same time as the tool 29 attached to the tool 29 rotates, the tool 29 also moves in the vertical direction. Then, when the pinion gear 3 of the drilling machine is rotated by a power (not shown), the slide quill 2 of the drilling machine starts to descend via the rack gear 4, and the attachment surrounding member fixed to the slide quill 2 by the bolt 18 17 is also lowered, and the cam follower attached to the attachment surrounding member 17 is lowered.
Since the tool 23 forcibly pushes down the work odor attachment member 13 via the cam groove 14, the tool 29 starts machining while rotating and vertically vibrating.

The machining hole 31 of the workpiece 30 is connected to the pilot part 2 of the tool 29.
9e, the rough processing section 29d, and the finishing section 29c, and finally the guide section 29b is guided into the processing hole 31 to complete the processing. In this way, the machined surface of the machined hole 31 of the workpiece 30 has a cycurve pattern unique to superfinishing. Prior to this, the workpiece 30 is machined with a hole 3.
If you want to increase the number by 1, you can use a drilling machine as shown in FIG. 1 and drill holes with a drill 9.

Moreover, the tool exchange between the drill 9 and the diamond reamer 29 is performed using the attachment 10 according to one embodiment of the present invention.
If you use the diamond reamer 2 as shown in Figure 6,
It is possible to use tools such as No. 9.

Next, attachment 1 according to another modified embodiment of the present invention
The effect of 0' will be explained.

When the main shaft 5 is rotated by a rotational force transmitted from a power source (not shown), the attachment mounting member 11' rotates in a predetermined direction as shown in FIG. This rotational force of the attachment mounting member 11' is also transmitted to the tool mounting member 13' via the key 16', but at that time,
The cam follower 23' of the attachment surrounding member 17', which is made immovable by the bolt 18' on the drilling machine body 1', is engaged in the cam groove 14' of the tool mounting part village 13'. , is forcibly guided by the shape of the cam groove 14', and the small diameter sliding shaft portion 13'a vibrates vertically within the slide hole 12' of the attachment mounting portion 10'. Do some physical exercise. As a result, the tool 29 attached to the tapered protrusion 13'c of the work odor attachment member 13' also rotates, and at the same time,
They move together in the vertical direction. This attachment 10
' can be used in a drilling machine in which the attachment surrounding member 17' cannot be directly fixed to the slide quill 2. - As described above, according to the present invention, it is possible to perform super finishing using the most common and inexpensive drilling machine, and it is compact and can be installed on any type of drilling machine.

In other words, by incorporating the attachment directly into the main shaft of the drilling machine, it has become possible to attach it as an attachment to any type of drilling machine. In addition, it is easy to replace the small-diameter sliding shaft part and cam groove of the tool mounting member, and the vibration frequency and amplitude, which are important for superfinishing, can be easily changed depending on the hole diameter size, processing accuracy, and material of the workpiece. On the other hand, by attaching this attachment to a jig polar or milling machine, hole diameter accuracy and hole pitch accuracy can be ensured at the same time.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part of a pole machine, Fig. 2 is a cutaway front view of the main part showing an embodiment of the inner surface superfinishing attachment for a drilling machine according to the present invention, and Fig. 3 is an enlarged view of the tool mounting area in Fig. 2. FIG. 4 is an enlarged development view of the cam groove in FIG. 3, FIG. 5 is a sectional view taken along the line A-A in FIG. FIG. 7 is a front view with a main part cut away showing another modified embodiment of the inner surface superfinishing attachment for a drilling machine according to the present invention. 11, 11'... Attachment mounting member, 1
1a, 11'a... 7-perform protrusion, 12, 12'
......Slide hole, 13, 13'...Tool mounting member, 13a, 13'a...4.Hōto moving shaft part, 1
3b, 13'b...Large diameter part, 13c, 13'c...
...7 Par-shaped protrusion, 14, 14'... Cam groove, 17, 17'... Attachment surrounding village, 17
a, 17'a... Upper annular protrusion, 17b, 17'
b...Lower flange part, 18, 18'...
...Bolt, 19, 19'...Through hole, 23
, 23'... force muffler. Figure 1 Figure 2 Figure 3 Figure 5 Figure 4 Figure 6 Figure 7

Claims (1)

[Claims] 1. An attachment mounting member whose upper end is a tapered protrusion and whose lower end is provided with a slide hole, and a small diameter sliding shaft that is slidably inserted into the slide hole of the attachment mounting member. , a cam groove is formed in the large diameter part in the middle, and a tapered protrusion is provided downwardly, and a tool mounting member that can rotate integrally with the attachment mounting member; The upper annular protrusion has a bolt for stopping rotation, and a through hole is formed in the center to loosely fit the attachment mounting member,
The inner surface superfinishing attachment for a drilling machine further comprises an attachment surrounding member having a cam follower fixedly attached to the lower flange portion to be permanently engaged with the cam groove of the tool mounting member.