JP4051126B2 - Attachment for backside processing in machine tools - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an attachment for back surface processing in a machine tool.
[0002]
[Prior art]
For example, as shown in FIG. 3, when one end of the workpiece 1 is formed in a bifurcated shape,
When processing both the processing surfaces 2 and 3 which oppose, as shown in FIG. 4, the taper shank axis | shaft 5 is fitted to the spindle head 4, and the surface 2 is processed by the side cutter 6 pivotally attached to the taper shank axis | shaft 5. , 3 was processed.
Further, as shown in FIG. 5, a taper shank shaft 5 is fitted to the spindle head 4, an L-shaped special attachment 7 is attached to the taper shank shaft 5, and the cutting tools 8, 9 are attached to both ends of the special attachment 7. The processing surfaces 2 and 3 are also processed by mounting the.
[0003]
Each of the means shown in FIGS. 4 and 5 is cantilever, so that the rigidity is insufficient, the accuracy of the machining surface is poor, the shape on the workpiece side is limited, and machining is often difficult. .
[0004]
Therefore, the cutting tools 8 and 9 are attached to one end of a dedicated machine tool 10 adapted to the shape of the workpiece 1 configured to be movable in the X-axis direction and the Y-axis direction shown in FIG. What can perform the processing of 3 came to be used.
[0005]
[Problems to be solved by the invention]
Since the dedicated machine tool is a machine according to the shape of the workpiece, machining is easy,
Although the rigidity is sufficient, there is a problem that it cannot be applied to other workpieces, the equipment cost is high, and an extra machine installation area is required.
[0006]
Therefore, in the present invention, an NC machine tool having two opposing shafts is used, attachments having tapered shanks fitted to both spindle heads are used, and one of the spindles is rotated to firmly hold the cutting tools on both sides. So that the work can be performed.
[0007]
[Means for Solving the Problems]
The present invention relates to the other taper shank holder for fitting a rotatable taper shank shaft penetrating the attachment main body to one main spindle head of two opposing horizontal main spindles and supporting the attachment main body on the opposite side of the one main spindle head. Is fitted to the other spindle head, and a driven gear that is rotated by a main shaft gear that is attached to the tapered shank shaft is attached to a part of the attachment, and a cutting tool is fixed to both ends of the driven shaft that is attached to the driven gear. The backside processing attachment for machine tools was constructed.
[0008]
In the attachment for processing the back surface, a reference pad that contacts the spindle head is attached to one end of the attachment body, the locating shaft fixed to the attachment body is fixed to the opposite side of the reference pad, and the locating shaft is inserted into the taper shank holder . by further incorporating a spring into the interior of the tapered shank holder, by Rukoto is pressed against the attachment body to the other of the spindle head through a locate shaft by a spring, further also projected the locate pin to one end of the work table The above-mentioned problems were solved by installing the table table so that the attachment main body can be mounted and fixed .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. In a machine tool having opposed spindle heads 4 and 25, a tapered shank shaft 5 penetrating into the attachment body 11 in one spindle head 4. It fitted a tapered portion 5 ', held in Purusuta head 12.
Further, a gear support portion 13 extending downward is provided on the side of the attachment main body 11 opposite to the main spindle head 4. Then, the main shaft gear 14 is attached to the tapered shank shaft 5 at the upper portion of the gear support portion 13, and the idle gear 15 meshing with the main shaft gear 14 is attached to the idle shaft 16 positioned in parallel with the tapered shank shaft 5, An idle shaft 16 is mounted on the gear support portion 13, and a driven gear 17 that meshes with the idle gear 15 is attached to a driven shaft 18 that penetrates the lower portion of the gear support portion 13.
[ 0010 ]
Further, the cutting tools 19 and 20 are fixed to both ends of the driven shaft 18, respectively, and the machining surfaces 2 and 3 of the workpiece 1 are cut by the rotation of the cutting tools 19 and 20.
[ 0011 ]
A lid 21 is fixed to the peripheral surface of the end portion of the tapered shank shaft 5 at the upper part of the gear support portion 13 of the attachment body 11 so as to cover a part of the main shaft gear 14 and the idle gear 15. .
[ 0012 ]
Further, a lid 22 penetrating the driven shaft 18 is fixed to the lower portion of the gear support portion 13 to cover the driven gear 17 and a part of the idle gear 15.
Further, the shaft end of the idle shaft 16 is covered by fitting the lid 23 between the lid bodies 21 and 22.
[ 0013 ]
Further, a locating shaft 24 having a central axis positioned on an extension line of the central axis of the tapered shank shaft 5 is fixed to the lid body 21. A taper shank holder 26 fitted to another spindle head 25 is positioned on the extension line of the locating shaft 24. In the drawing, 27 is a pull-scan data head, securing the tapered shank holder 26.
[ 0014 ]
The tapered shank holder 26 is provided with a holder portion 29 having a hollow portion 28 on the tapered shank shaft 5 side, and a spacer 30 is fixed to the end portion of the holder portion 29. One end of the spacer 30 is also located inside the holder portion 29, the other end is located outside the locating shaft 24, and the central portion is connected to a plurality of pins 32, 32 fixed to the locating shaft 24 via pads 31. It is in contact.
[ 0015 ]
A plurality of spring holes 33 are provided in the outer peripheral portion of the holder portion 29, the springs 34 are fitted, the locating shaft 24 is pressed by the springs 34 through the pads 31, and the attachment body 11 is brought into contact with the spindle head 4. It presses against the reference plate 35 that is in contact.
[ 0016 ]
In the figure, reference numeral 36 denotes a reference pad, which is fixed to the attachment body 11 and has a free end in contact with the reference plate 35. 37 is a dowel pin, fixed to the attachment body 11, so as to position the attachment body 11 is fitted into the positioning hole 38 having a free end on the reference plate 35.
[ 0017 ]
An attachment table 40 is installed at one end of the work table 39 for performing the machining operation shown in FIG. 2, and the attachment main body 11 can be installed by providing several attachment pins 41, 41 on the attachment table 40. .
[ 0018 ]
The embodiment of the present invention is configured as described above. By fitting the tapered portion 5 'of the tapered shank shaft 5 and the tapered shank holder 26 to the both spindle heads 4 and 25 , the attachment body 11 can be removed from both sides. It is held in a state of being pinched .
At this time, the attachment main body 11 is positioned by the reference pad 36 and the dowel pin 37 by the spring 34 provided on the holder portion 29 via the locate shaft 24 and pressed against the reference plate 35 in contact with the spindle head 4 to thereby attach the attachment main body 11. Is securely held on both spindle heads 4, 25.
[ 0019 ]
When the spindle of the spindle head 4 is rotated, the taper shank shaft 5 is rotated and the spindle gear 14 is also rotated. By this rotation, the driven gear 17 is also rotated through the idle gear 15 to rotate the driven shaft 18.
[ 0020 ]
By the rotation of the driven shaft 18, both the cutting tools 19 and 20 are rotated, and the machining surface 2 of the workpiece 1 is cut by one of the cutting tools 19.
At this time, both the spindle heads 4 and 25 are moved in the X-axis direction which is the head direction of the taper shank shaft 5, the Y-axis direction which is orthogonal to the X-axis horizontally, and the Z-axis direction which moves up and down with respect to the workpiece 1. The processed surface 2 is processed by moving it.
[ 0021 ]
Thereafter, both spindle heads 4 and 25 are moved in the X-axis direction to bring the cutting tool 20 into contact with the machining surface 3, and both spindle heads 4 and 25 are moved in the X, Y, and Z-axis directions for machining.
In this process, one spindle head 25 is not rotated and is brought into a stopped state.
[ 0022 ]
After the operation is completed, both spindle heads 4 and 25 are moved in the Y-axis direction, the attachment body 11 is positioned on the attachment table 40 and fixed by the locating pins 41 and 41, and the tapered shank shaft 5 and the tapered shank holder 26 are moved. It was separating the two spindle head 4, 25 is moved in the X-axis direction, both the spindle head 4, 25 is to allow other machining operations in a work table 39.
[ 0023 ]
After the machining operation is completed, only the spindle head 25 is retracted alone, the taper shank holder 26 is detached, and the taper shank holder 26 is separated from the locating shaft 24 and separated from the attachment main body 11, and the taper shank holder 26 is removed. if desorb only as a normal tool holder, it is possible to store in the tool magazine with automatic tool converter.
[ 0024 ]
The present invention is not limited to the above-described embodiment, and any NC machine tool having an opposed horizontal axis spindle head such as an opposed horizontal manning center and a double-headed 5-face milling machine. All are applicable.
[ 0025 ]
【The invention's effect】
Since the attachment main body is supported by the spindle heads on both sides with the above-described configuration and action of the present invention, both the cutting tools are in a both-end holding state, and the fork-shaped inner surface machining is efficiently and highly performed. It can be carried out with accuracy, and it is not necessary to install an expensive dedicated machine tool, and it can be handled only by adding an attachment, so it is economical.
[ 0026 ]
Moreover, since the attachment mounting device is provided, the attachment can be prepared at one end of the work table, and storage is easy.
[ 0027 ]
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an attachment for vertical surface machining in a machine tool of the present invention.
FIG. 2 is a front view of the attachment placement device.
FIG. 3 is a perspective view of a fork-like workpiece.
FIG. 4 is a sectional view of a conventional cutting apparatus.
FIG. 5 is a cross-sectional view of a cutting device using another attachment.
FIG. 6 is a front view of a conventional dedicated machine tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Workpiece 2 Work surface 3 Work surface 4 Spindle head 5 Tapered shank shaft 6 Side cutter 7 Attachment 8 Cutting tool 9 Cutting tool 10 Machine tool 11 Attachment main body 12 Pull stud 13 Gear support part 14 Manual gear 15 Idle gear 16 Idle gear 17 driven gear 18 driven gear 19 cutting tool 20 cutting tool 21 lid body 22 lid body 23 lid 24 locate shaft 25 spindle head 26 taper shank holder 27 pull stud 28 hollow shaft 29 holder portion 30 spacer 31 pad 32 pin 33 spring hole 34 spring 35 Reference plate 36 Reference pad 37 Dowel pin 38 Positioning hole 39 Work table 40 Attachment table 41 Locate pin

Claims (4)

  A rotatable taper shank shaft that passes through the attachment main body is fitted to one main spindle head of two opposing horizontal main spindles, and the other tapered shank holder that supports the attachment main body on the opposite side of the one main spindle head is used as the other main spindle. It is fitted to the head, a driven gear that is rotated by a main shaft gear attached to the tapered shank shaft is attached to a part of the attachment, and a cutting tool is fixed to both ends of the driven shaft that is attached to the driven gear. Attachment for backside processing in machine tools.   2. A reference pad that abuts the spindle head is attached to one end of the attachment body, a locating shaft fixed to the attachment body is fixed to the opposite side of the reference pad, and the locating shaft is fitted into a tapered shank holder. Attachment for backside processing of machine tools.   The attachment for back surface processing in a machine tool according to claim 2, wherein a spring is built in the taper shank holder, and the attachment main body is pressed against the other spindle head by a spring through a locating shaft. The attachment body is detachably fixed by a locate pin on a table table installed at one end of the work table, and a pair of opposing spindle heads can be detached from the attachment body. The attachment for back surface processing in the machine tool of Claim 1 characterized by the above-mentioned.

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