JPH05138413A - Cutter relief device for boring processing machine - Google Patents

Abstract

PURPOSE:To perform adjustment of a cutter and its relief amount simply by turning and displacing a cam body by means of a driving device so as to move a work rest. CONSTITUTION:A cutter relief device 7 possesses a work rest 8, a rest supporting member 16 that supports this work rest 8 capably of moving it on the main body of the cutter relief device for a boring processing machine, a cam body 17 that is provided by engaging with this rest supporting member 16, and a driving device 18 to turn and displace this cam body 17. And, a work is moved by operating the driving device 18 to move the work rest 8 by the cam body 17 through the rest supporting member 16, thereby interference between a cutter and the processing part of the work can be avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter relief device for boring machines.

[0002]

2. Description of the Related Art A boring machine 1 includes a base 2 and a machining jig 3 provided at the center of an upper portion of the base 2 as shown in FIG.
And a work clamper 4 provided above the processing jig 3 and a spindle unit 5 provided so as to face both sides of the processing jig 3, and the work clamper 4 carries the work clamper 4 onto the processing jig 3. The formed work is machined by a cutter 5a attached to the spindle 6 of the spindle unit 5. And the cutter relief device 7
As shown in FIG. 4, the work jig 8 is provided on the machining jig 3, the guide rod 10 that is inserted into the main body 9 of the machining jig 3 and movably supports the work jig 8, and the work rod. An ejector cylinder 12 provided with a rod 11 engaged with the base 8 and a relief device cylinder 1 in which a rod 13 is provided in series at a rear portion of the ejector cylinder 12 and is capable of abutting against a piston 14 of the ejector cylinder 12.
5 and. And the relief device cylinder 15
The rod 13 of the relief device cylinder 15 moves to the ejector cylinder 12 side by injecting the pressure oil into the lower part of the rod, contacts the piston 14 of the ejector cylinder 12, advances the rod 11, and is engaged with the rod 11. The work pedestal 8 is moved upward with the guide rod 10 as a guide, and the work portion of the work on the work pedestal 8 is moved to a position where it does not interfere with the cutter 5a. Next, referring to FIGS. 5 to 8 for the cutter relief,
The case of line boring will be described. In the line boring, as shown in FIG. 5, the boring bar 5b, in which the cutter 5a faces a certain direction and stops rotating, is inserted into the hole 3b with respect to the hole 3b of the fixed work 3a before processing, After that, the boring bar 5b is rotated and axially fed to perform hole processing. When the boring bar 5b is inserted into the hole 3b before processing, the cutter 5a and the hole 3b interfere with each other when the center of the boring bar 5b and the center of the hole 3b are aligned. The center of the bar 5b is offset from the center of the hole 3b, and the cutter 5a and the hole 3b
And the clearances Δc and Δc are provided between the boring bar 5b and the hole 3b.
The amount of shift in this case is the cutter relief (c). It should be noted that FIG. 7 shows a state in which the cutter 5a is inserted into the hole 3b in the state where the cutter relief (c) is given.
Shows the state where the hole relief is completed by giving the cutter relief (c).

[0003]

However, in the above-mentioned conventional cutter relief device 7, the stroke of the rod 13 of the relief device cylinder 15 directly corresponds to the cutter relief amount corresponding to the displacement between the cutter 5a and the workpiece machining portion. Therefore, when a minute amount of cutter relief is required, it is necessary to delicately control the injection of pressure oil into the relief device cylinder 15, and to adjust the cutter relief amount, the ejector cylinder 12 is provided with an adjusting mechanism (workpiece). It is necessary to add the height of the pedestal 8 or the length of the rod 11 of the ejector cylinder 12 to an adjustable type. As a result, the ejector section becomes complicated, cutting chips are likely to accumulate due to processing, and the cost of the apparatus increases.

In view of this, it is an object of the present invention to provide a cutter relief device for a boring machine capable of easily moving a work corresponding to a minute cutter relief amount and adjusting the cutter relief amount. It was made as.

[0005]

In order to achieve the above object, the present invention avoids interference between the cutter and the work portion of the work when the cutter is inserted in the work portion of the boring machine. In order to provide a displacement between the cutter and the work in order to provide a cutter relief device, the cutter relief device includes a work pedestal, a pedestal support member that movably supports the work pedestal on the apparatus body, and the pedestal support. A cam body provided by engaging with the member and a drive device for rotationally displacing the cam body are provided, and the drive device is operated to move the work cradle by the cam body through the cradle support member. Thus, the work is moved, and a displacement is given between the cutter and the work portion of the work to avoid interference.

[0006]

When the drive device is operated to rotationally displace the cam body, the pedestal support member moves via the cam body, and the work cradle moves. Then, along with this, the work on the work pedestal moves and a predetermined amount of displacement can be obtained between the cutter and the work portion of the work, and therefore interference between the cutter and the work can be avoided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in FIGS. 1 and 2 by using the same reference numerals for the same components as those in the prior art.

The cutter relief device 7 includes a work support 8
A pedestal support member 16 for movably supporting the work pedestal 8 on a main body 9 as an apparatus main body, a cam body 17 engaged with the pedestal support member 16 and the cam body 1.
A drive device 18 for rotatively displacing 7 and an ejector cylinder 12 are provided.

The work pedestal 8 has a rectangular shape when viewed from above, and a work is placed on the upper surface thereof, and the placed work is clamped to the work pedestal 8 by a clamp device (not shown) as usual. ing.

The pedestal support member 16 has guide rods 10 fixed to the four corners of the lower surface of the work pedestal 8 and a connecting member 19 for connecting between two adjacent lower end portions of these guide rods 10. The two guide rods 10 and one connecting member 19 are formed in an upward U-shape. A rod 20 is provided downward at the center of the connecting members 19. The guide rod 10 is slidably supported by the main body 9 and the rod 20 is slidably supported by the guide member 21, and is vertically moved by the drive device 18 and the cam body 17.

The cam body 17 has a bearing 22 as shown in FIG.
A shaft portion 23 pivotally supported on the shaft portion 23, an eccentric shaft portion 24 extending on both sides of the shaft portion 23 so as to be eccentric to a center of the shaft portion 23 by a predetermined amount, and one eccentric shaft portion 24 A cam shaft 26 including a shaft portion 25 extending outward and a cam shaft 2
An arm member 28 fitted to the shaft portion 25 of No. 6 and fixed to the key 27
And have. The lower portion of the rod 20 is in contact with these eccentric shaft portions 24. The outer end side of the shaft portion 25 is supported by the processing jig body 9 by a bearing 29.

The drive device 18, as shown in FIG. 1, includes a hydraulic cylinder 30, a shaft 31, a link member 32, and
And a connecting member 33.

The hydraulic cylinder 30 is mounted on the main body 9 with the rod 34 facing downward, and the shaft 31 is joined to the rod 34. A recess 35 is formed on the surface of the shaft 31 near the lower end thereof, and a spherical portion 36 formed on one end of the V-shaped link member 32 is formed in the recess 35. Has been inserted. Further, the V-shaped bent portion of the link member 32 is supported by the main body 9 by the shaft 37, and the connecting member 33 is connected between the other end of the link member 32 and the arm member 28. There is. And the ejector cylinder 1
2 is fixed to the main body 9 so that the rod 11 is engaged with the lower surface of the central portion of the work cradle 8. 3
Reference numeral 8 indicates an adjusting screw stopper, and 39 indicates a stopper pad.

Next, regarding the case where the value of the eccentricity amount is set to (y) by the cutter relief device 7 when the eccentric shaft portion 24 is rotated by 90 ° (when the work cradle 8 requires the maximum stroke). The operation will be described.

First, the ejector cylinder 12 is lifted to mount the work on the work support 8. Next, as shown in FIG. 1, when the eccentric shaft portion 24 rotates 90 °, the eccentric shaft portion 2
The dimension between the lower surface of the adjusting screw stopper 38 and the upper surface of the sputter pad 39 is adjusted while detecting the dimension of the rising of 4 by (y) while being detected by a cutter relief detection device (not shown). Then, the hydraulic cylinder 30 is operated to extend the rod 34 and move the shaft 31 downward.
Then, the link member 32 rotates in the clockwise direction indicated by the arrow A in FIG. 1, and the connecting member 33 moves in the leftward direction indicated by the arrow B. Therefore, the arm member 28 rotates in the clockwise direction indicated by the arrow C, the shaft portion 23 rotates, and the eccentric shaft portion 24 rotates 90 ° as indicated by the chain double-dashed line in FIG. The upper surface rises by a value (y) to be applied. Then, the eccentric shaft portion 24
The rod 20 engaged with is moved up by (y) in the direction indicated by the arrow D, and the work pedestal 8 is moved up via the pedestal support member 16. Here, the work is clamped at a position raised by the cutter relief amount (c) by clamping the work with a clamp device (not shown). Then, a cutter (not shown) is inserted into the work, and then the work is released from the clamp, the hydraulic cylinder 30 is operated to retract the rod 34, and the eccentric shaft portion 24 is moved to the arrow C in FIG.
Cutter relief amount (c)
Is set to zero and the work is clamped again. As a result, the work is clamped at the processing position and the work is started. After the processing is completed, the cutter relief device 7 again displaces the cutter and the work so that the cutter and the work do not interfere with each other and the cutter is pulled out from the work.

The cutter relief amount (c) can be adjusted as follows. For example, when the value of the amount of eccentricity is desired to be smaller than the value of (y), the rotation of the eccentric shaft portion 24 may be smaller than 90 °. Therefore, the lower surface of the adjusting screw stopper 38 and the stopper pad 3
9 and the upper surface of the eccentric shaft portion 24 is 90 degrees.
The eccentric shaft portion 24 is rotated by a predetermined angle smaller than 90 ° by adjusting the rotation angle to be smaller than 90 °, so that the value of the eccentricity is set to a value smaller than the value of (y). You can In this way, the adjustment screw stopper 38
By adjusting the dimension between the stopper pad 39 and the stopper pad 39, the hydraulic cylinder 30 operates with the dimension between the adjusting screw stopper 38 and the stopper pad 39 as the stroke, so the cutter relief amount corresponding to this stroke is set. It can be easily adjusted.

[0017]

As described above, according to the present invention, the cutter relief device is provided with the work pedestal and the pedestal support member for movably supporting the work pedestal on the apparatus main body. A work is moved by engaging a cam member with a support member and rotating and displacing the cam member by a driving device to move the work, thereby providing a displacement between the cutter and the work portion of the work. Therefore, the minute movement amount by the drive device can be reduced by the cam body, and therefore, the minute cutter relief amount can be easily set. Further, since the cutter relief device can be configured as in the illustrated embodiment, the cam and the drive device can be provided in the upper space of the main body of the device, so that the member cannot obstruct the adjustment of the cutter relief amount. This is advantageous in that it can be performed without any need, and the piping around the processing jig is reduced, and the accumulation of chips can be easily removed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a cutter relief device of a boring machine according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a side view of the boring machine.

FIG. 4 is a vertical sectional view of a cutter relief device of a conventional boring machine.

FIG. 5 is an explanatory diagram of a cutter relief.

FIG. 6 is an explanatory diagram of a cutter relief.

FIG. 7 is an explanatory diagram of a cutter relief.

FIG. 8 is an explanatory diagram of a cutter relief.

[Explanation of symbols]

 1 Boring Machine 7 Cutter Relief Device 8 Work Cradle 12 Ejector Cylinder 16 Cradle Support Member 17 Cam Body 18 Drive Device 24 Eccentric Shaft 26 Cam Shaft 30 Hydraulic Cylinder 38 Adjusting Screw Stopper 39 Stopper Plate

Claims (1)

[Claims] 1. A cutter relief device provided in a boring machine for providing a displacement between a cutter and a work in order to avoid interference between the cutter and the work part when the cutter is inserted into the work part. The cutter relief device includes a work pedestal, a pedestal support member that movably supports the work pedestal on the apparatus main body, a cam body that is provided in engagement with the pedestal support member, and the cam body. A drive unit for rotationally displacing the drive unit, and the drive unit is operated to move the work pedestal through the pedestal support member by the cam body, thereby moving the work, and between the cutter and the processing unit of the work. A cutter relief device for boring machines, which is characterized in that displacement is given to avoid interference.