JPS61209836A - Roller type work rest - Google Patents

Abstract

PURPOSE:To prevent chips from piling up on rollers by providing two rollers on the end of a slider which can be positioned, vertically in parallel and opposite to one roller which moves nearly on a horizontal plane, across a workpiece interposed in between. CONSTITUTION:A workpiece W is placed on a temporary table K, and actuators 1, 6 are operated to extend a rod 1a upward and a rod 6a leftward, and a roller R4 is brought into contact with the workpiece W from left via a link 2 while rollers R5, R6 are also brought into contact with the workpiece W from right via a slider 3. In order to stop the slider 3 in a position corresponding to the diameter of the workpiece W, a multiple-step stopper 10 is previously projected out by means of a piston 8 of the actuator 7 of a positioning mechanism 4 via a rod 9 and brought into contact with the front end of the boss 3a of the slider 3, to support the slider 3 in an accurate position. Since the two rollers R5, R6 are provided on end of the slider 3, vertically in parallel and opposite to the roller R4, piling up of ships on rollers due to a knife H' can be reduced, prevent the workpiece from being scratched.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a work rest that supports a workpiece in a lathe or the like, particularly a roller type work rest.

(Prior Art) As shown in FIG. 2, the conventionally known roller type work rest has two rollers R1 and R2 arranged horizontally in parallel with a workpiece W to be supported in between. The supporting stand B and one roller R3 facing the two rollers R1 and R2 are configured to be movable by an automatic alignment device M via arms AI and A2, respectively. , there is one that adjusts the positions of rollers R1, R2, and R3.

Further, as shown in FIG. 3, one roller R4 that can rotate via a cylinder C and a link L with the workpiece W to be supported sandwiched therebetween, and a replaceable support base B' are arranged vertically. There is one in which two rollers R5 and R6 are placed facing each other.

(Problems to be Solved by the Invention) Among the conventionally known roller type work rests, the one shown in FIG. 2 has an arm A1. Through A2
- Move roller R3, support base B and move roller R1, I? 2
．． Not only does the automatic centering device M for moving and supporting R3 to a position where it can be accurately supported by the workpiece W become complicated, but also, for example, when turning a hole, it is difficult to apply the cutting tool H as shown in Fig. 2. If this is done, there is a drawback that errors in the vertical direction of the work rest consisting of rollers R1, R2, and R3 directly appear as errors in diameter.

In addition, chips may accumulate on the rollers R2 and R3 of the work rest, which may damage the workpiece W.

In the case shown in Fig. 3, if the cutting tool H is applied to the workpiece W as shown in the figure, the above-mentioned error problem and the influence of the accumulation of chips will not occur, but workpieces W with different diameters can be produced in a mixed flow. In this case, support stand B.

It is necessary to replace each roller R5 and R6, and of course, a support stand with several high-precision rollers attached must be prepared for replacement, and there is also a risk of contact with the workpiece W during replacement. There is also.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention has two rollers facing two movable rollers on a horizontal plane with a workpiece to be supported sandwiched therebetween. To provide a roller type work rest in which the sliders are arranged vertically in parallel at the tip of a slider, and the slider is slidably positioned so as to be positionable.

That is, in the present invention, to explain this with reference to FIG.
Two rollers R5, facing the roller R4 arranged so as to be rotatable by the loft 1a and the link 2,
R6 is arranged vertically in parallel at the tip of the slider 3,
The slider 3 is positioned on a fixed base 5 so that it can be positioned by a positioning mechanism 4, and is slidable by an actuator 6 and its rod 6a.

(Function) When turning the workpiece W by the above means, actuators 1 and 6 are operated backward to rotate link 2 to the left, move roller R4 away from the position shown in FIG. 1, and move slider 3. Move to the right in Figure 1 and move rollers 1 to 5. Similarly, R6 is moved away from the position shown in FIG. and 6 to extend the rod 1a upward and the rod 6a to the left, apply the roller R4 to the workpiece W from the left via the link 2, and move the rollers R5 and R6 to the right via the slider 3. Then, apply it to the workpiece W. At this time, in order to stop the slider 3 at a position corresponding to the diameter of the workpiece W, a stopper (multi-stage stopper) 10 is projected in advance via a rod 9 by the piston 8 of the actuator tough of the positioning mechanism 4, for example. Slider 3 on the outermost side (first stage)
By bringing the front end of the boss 3a into abutment and then removing the temporary stand K, the workpiece W is supported at an accurate position.

When the workpiece has a small diameter like W', after placing the workpiece W' on the temporary table K and centering it in the position shown in FIG. If the front end of the boss 3a is brought into contact with the position 10a corresponding to the diameter of 2 (for example, the second stage), and the actuator 6 is operated forward in this state, the rollers R5 and R6
protrudes to the left as shown by the dashed line and stops at a position corresponding to the diameter of the workpiece W', and together with the roller R4 operated by the actuator 1, holds the workpiece W' at an accurate position.

(Example) The example shown in Fig. 4 and the following shows an original roller type work rest that is used in mixed production of two types of workpieces, for example, the crankshaft S shown in Fig. 5. A base 12 is a sliding base that is attached to the base 11 with bolts 13, and a rail 14 is fixed to the sliding base 12 with bolts 15. A slider 16 is slidably disposed above.

A roller support part 17 is fixed to the front of the slider 16 (on the left side in FIG. 4) with a bolt, and rollers R5 and R6 are attached to the forked tip part 17a of the roller support part 17.
are supported by pins 19 at a distance from each other in the vertical direction.

One end of a rod 20 is fixed to the rear end of the slider 16, and the other end of the rod 20 is connected to an actuator 21.

Reference numeral 22 denotes a bracket provided with a stopper bolt 23, which is fixed to the sliding table 12 and supports the rod 20 through it.

A bracket 24 supports the actuator 21, and is attached to the rear end of the base 11 (on the right side in FIG. 4).

Furthermore, 25 is a switch 26, 26' for operating the actuator.
This is a contact that operates the slider 16 and is fixed to the slider 16 via a rod 27.

Reference numeral 28 designates a bracket fixed to the base 11 with bolts 29, on which a figure 7 link arm 30 is pivotally supported, a roller R4 is pivotally supported on one end of the arm 30 by a pin 31, and a roller R4 is pivotally supported on the other end of the arm 30. is rod 3 of actuator 32
3 are connected with a pin 34.

Reference numeral 35 is a contact similar to that described above, which opens and closes the operating switch 36 of the actuator 32.

Reference numeral 37 denotes a positioning mechanism for the slider 16, which consists of an actuator mounted on the base 11 and a multistage stopper 40 mounted on the tip of the rod 39.
0 is arranged so that it passes through the slide table 12 and the rail 14 and slides in a hole 41 made perpendicular to the rail 14, and its tip projects into a long hole 16a made in the lower surface of the slider 16. ing.

In the illustrated case, the stopper 40 has two stages, the first stage being an outer upper end portion 40a of the stopper 40, and the second stage being a notch portion 40b at the upper end. Note that it is preferable that the actuator 38 be provided with something similar to the contacts 25 and 35, but this will be omitted.

The rollers R4, R5, and R6 are opposed to each other across the journal portion J of the crankshaft S, for example, but when the crankshaft S is supported by the rollers R4, R5, and R6, the axis of the roller R4 is aligned with the journal portion J. The intermediate point of each axis of the rollers R5 and R6 is on the line 43, which is parallel to the rail 14 passing through the axis of the roller 85. It is necessary that the line 43 connecting R6 is perpendicular to the above line 42.

In the embodiment, the slider 16 slides on a rail 14 that is slightly more diagonal than horizontal as shown in FIG. 4(a), but the rail 14 may of course be horizontal. Furthermore, it may be downward to the left in FIG. 4(a). The point is that, as mentioned above, problems due to chips do not occur and the influence of vertical errors of the rollers R4, R5, and R6 is within a range that can be affected by the precision of the crankshaft S.

In the embodiment of the present invention configured as above, now,
The slider 16 is connected to the crankshaft S shown in FIG. 4(a).
The rear edge 16b of the elongated hole 16a formed in the lower surface of the slider 16 is further to the right of the position where the multi-stage stopper 40 is supported.
Therefore, the rollers 125 and R6 have moved to the right from the position shown in the figure, and the stopper bolt 23 and the pin 16C protruding from the slider 16 have collided and stopped, and the roller R4 has moved to the right. 7 figure link arm 3
0, it is assumed that the position is rotated to the left from the position shown in the figure.

As described above, the crankshaft S is placed on the temporary stand K at the beam processing position, one end is chucked, and the amount of protrusion of the multi-stage stopper 40 into the elongated hole 16a of the slider 16 is adjusted so that the crankshaft For example, journal part J
, select whether the rear edge 16b of the long hole 16a of the slider 16 should be brought into contact with the side surface 40a of the multistage stopper 40 or the notch 40b, and move the actuator 38 forward to move the multistage stopper 40. 40 protrudes into the elongated hole 16a of the slider 16. (In this example, initially the side surface 40a of the multistage stopper 40 is
The description will be made assuming that the contact point contacts the rear edge 16b of. ) In this state, when the actuator 21 is operated forward, the slider 16 is moved to the left on the rail 14 by the rod 20 in FIG. stops when it comes into contact with
The positions of rollers R5 and R6 are determined.

Next (or at the same time), when the actuator 32 is moved forward, the figure 7 link arm 30 is rotated to the right by the rod 33, and the roller R4 comes into contact with the journal portion J of the crankshaft S, and further pushes the journal portion. J is pressed against the rollers R5 and R6, whereby the crankshaft S is held accurately and alignment is completed.

When the crankshaft machining is completed in this state,
Move the actuator 32 backward to move the figure 7 link arm 3.
0 to the left and release roller R4 from the crankshaft S.

Thereby, the crankshaft S can be taken out without interfering with the roller R4.

Thereafter, when machining a crankshaft whose journal portions J have the same diameter, it is sufficient to move only the roller R4 without moving the slider 16 and keeping the rollers R5 and R6 in the same position.

When machining a crankshaft with a different journal diameter, for example, a small diameter, leave the slider 16 in the position shown in FIG. After the edge 16b is separated from the multistage stopper 40, the actuator 38 is operated backward to lower the notch 40b of the multistage stopper 40 to a position where the rear edge 16b of the slider 16 comes into contact with it.

If the actuator 32 is operated forward here, the slider 16 will move until the rear edge 16b of the elongated hole abuts the notch 40b of the multi-stage stopper 40, and will stop there.
Rollers R5 and R6 are positioned further to the left in FIG. 4, and together with roller R4, accurately support the small diameter crankshaft.

(Effects) The roller-type work rest of the present invention has two rollers aligned vertically at the tip of a slider, facing a single movable roller on a horizontal surface with a workpiece to be supported in between. In addition, since the slider is installed so that it can be positioned and slid, the possibility that chips generated during machining will accumulate on the roller is reduced. There is no risk of damaging the workpiece.

Further, the positions of the rollers R5 and R6 can be adjusted very easily, and there is no problem in the mixed flow production of workpieces having different diameters. Furthermore, by applying the cutting tool to the workpiece as shown in FIG. 1, the influence of errors on the work rest on the workpiece is extremely reduced, and accuracy is stabilized.

[Brief explanation of the drawing]

FIG. 1 is a basic configuration diagram of the roller type work rest of the present invention.
Figures 2 and 3 are basic configuration diagrams of a conventional work rest, Figure 4 (a) is a front view of the work rest of the present invention, and Figure 4 (b).
) is a plan view of the same, and FIG. 5 is a view seen from the left side of FIG. 4(a). R1-R6...Roller, B, Il'...Support stand, hoop, edge"...Workpiece member, C...Schilling, H
,H"...cutting tool, K...temporary stand, 1.6...
・Actuator, 2...link, 3...
Slider, 4... Positioning mechanism, 5... Fixing base, 7... Cylinder, 8... Piston, 9...
...Loft, 10...Stopper, 11...Base,
12...Sliding base, 14...Rail, 16...Slider, 17...Roller support part, 20.33.
39...Loft, 21.32.38...Actuator, 30...7-shaped link arm, 37...Positioning mechanism, 40...Multi-stage stopper, S...Crankshaft. Figure 1 Figure 2 Figure 3

Claims (3)

[Claims] (1) Two rollers are arranged vertically in parallel at the tip of a slider facing one movable roller on a substantially horizontal plane across the workpiece to be supported, and the slider is slidable so as to be positionable. A roller-type work rest that is installed so that it can be moved. (2) A roller-type work rest according to claim 1, wherein the slider is configured to be slid on a substantially horizontal surface by an actuator and to have a plurality of stopping positions determined by a positioning mechanism. (3) The roller type workpiece according to claim 2, wherein the positioning mechanism comprises a multistage stopper movable in a direction substantially perpendicular to the sliding direction of the slider, and an actuator that slides the stopper. Rest.