JPS61182743A - Positioning device for non-circular work - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is a device for positioning workpieces, in particular piston rings which can be arranged one on top of the other, and which is provided with markings in the area of its peripheral surface. The invention relates to a positioning device for non-circular workpieces, comprising a directional drive, an identification device and a holding device.

[Conventional technology]

A non-circular piston ring blank having markings in the form of a material thickening in the area of the peripheral surface is known from DE-O 82800813. In addition, a centering notch can be provided. In particular, the positioning of the stacked materials takes place in that the mass is rotated by a drive. In that case, the thickening rests against the stop, or the notch must fit into a centering shaft of smaller diameter.

Furthermore, the positioning device for the non-circular piston ring is 1-P.
S 2840863, and in this device,
In this case, two rollers, at least one of which has a driving capacity (in which case the superimposed rings are carried by their own weight), are provided between the rollers with brake pieces having a constant height relative to the rollers. , thus one or more rings are braked and positioned in a region of the surface that differs from the normal non-circular shape. It is designed to be listed.

Even ignoring the circumferential alignment inaccuracies due to friction, weight differences, etc. mentioned above, these two devices do not allow operator intervention to separate rings that are glued together. However, it has the disadvantage that several piston rings remain glued so that only one ring is aligned and the other ring or rings are not aligned.

[Problems to be solved by the present invention]

The basic objective of the invention is therefore that non-circular workpieces are automatically aligned and cleaned simultaneously, or that all stacked workpieces are uniformly aligned to a reference point for subsequent machining. The object of the present invention is to provide a device capable of aligning workpieces that are significantly irregular (having different diameters) so that the workpieces are aligned with each other.

[Means for solving problems]

This object is achieved according to the invention by allowing the workpiece to be removed radially from the drive and pressed against a stop. The workpieces, in particular piston rings, can be aligned in groups by means of devices such as those described in the prior art. When this is completely done, the workpiece is driven by
In this case, for example, each superimposed workpiece, which is removed from the centering axis and is pressed radially against the stop, is individually positioned. After axially fixing the workpiece group positioned in this way, subsequent machining operations, such as internal and external machining, take place.

The workpiece can be removed from the drive by means of radially synchronously displaceable jaws arranged side by side on both sides of the drive, viewed in the circumferential direction, and by means of two prismatic stops l. It is preferable to be able to press the stopper. Alternatively, the stopper can be formed in the shape of a roller.

A preferred embodiment of the invention provides that the jaws are provided in the region of the inner circumference of the workpiece and the stop is provided in the region of the outer circumference of the workpiece, the jaws and/or the stops being aligned when viewed in the axial direction. It is made to be approximately equal to the axial length of the workpiece.

As mentioned above, the jaws need to be able to displace radially and synchronously. In order to do this simply, it has been proposed to connect the jaws to each other radially on the outside of the drive.

Depending on the unevenness of the surfaces of the individual stacked workpieces, it is effective to cover the jaws and/or the stop with an elastic layer in order to sufficiently compensate for the differences.O If the stop is formed in the form of a roller It has been proposed to make the axial spacing of the rollers adjustable, in which case at least one roller can be driven in one circumferential direction.

Depending on the application, at least one roller can optionally be driven eccentrically. With this configuration, the rollers can optionally form an additional drive and can also be driven eccentrically. (If there are piston rings that are glued to each other, at least one
The eccentric rotation of the two rollers causes them to be vertically impacted until they are separated from each other and aligned. When such an action is performed.

For example, the distance between the roller axes is increased to the extent that the roller is removed from the outer peripheral surface of the workpiece. To compensate for inaccuracies, the entire mass is radially pressed and axially fixed against spaced stationary rollers by said kind;
The equipment for reprocessing is removed ( entnehmen
). Site conditions need to be suitable so that the drive of the rollers can be structurally replaced by a cam, crank drive, etc.

The form of the markings on the workpiece is not important to the invention. This marking can also be formed, for example, by an incision that is mechanically scanned by a centered axis. However, it is also possible to consider optically or magnetically scannable workpiece identification markings, which can be scanned by suitable devices and cause the workpiece to stop in a certain area ◇ [ Embodiments] Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a principle diagram of a position adjustment device for several non-circular piston rings arranged in the axial direction.

The piston ring 1 has a mark in the shape of the notch 2 on the inner peripheral surface 3.
In preparation for this, they are passed through the frame 4 in an irregular manner. A rotation adjustment shaft 5 (drive device) is attached to this frame 4. Due to the friction between the inner peripheral surface 3 and the organizing shaft 5,
It comes to fit into the organizing shaft 5 which is formed with a small piston.

Although the individual piston rings 1 are certainly aligned according to their markings i, there is a high defect rate in the subsequent processing steps due to differences in wall thickness. Therefore, after sorting, it is necessary to position all the piston rings 1 so that they are lined up on a certain reference plane. This means that the piston link 1 is removed from the organizing shaft 5 by two jaws 6 and 7 provided on the side of the organizing shaft 5 when viewed in the circumferential direction, and two stoppers abut against the outer circumferential surface 8 of the piston ring 1. 9
This is done in such a way that it is pressed against a angle of 10°. Jaw6.
7 are connected to each other by the crossbeams Ill and are fed synchronously in the direction of the inner circumferential surface 3. In order to obtain an ideal compensation for the difference, the elasticity 1 is
1i1112, 13.14.15 is crowned.

FIG. 2 shows another embodiment for arranging piston rings 1 one above the other. In this case, two rollers 16 and 17 having the same rotation direction are provided on the outer peripheral surface 8 of the piston ring 1.
is provided. As a result, the non-circular piston ring 1 is guided in the circumferential direction so that its notch 2 fits into the organizing shaft 5, which may also rotate. In rare cases, two or several piston rings may be glued to each other, so there is a risk that all piston rings 1 stacked one on top of the other may not be arranged uniformly.O Make sure all piston rings 1 are arranged. Therefore, the two rollers 16 and 17 are driven eccentrically. Therefore, sometimes a high pressure and sometimes a low pressure are applied to the individual non-circular piston rings 1, and the adhered rings are separated and arranged. When this is done, the rollers 16 , 17 are spaced apart, ie the axial spacing is increased so that the rollers 16 , 17 do not touch the peripheral surface 8 . Therefore, piston ring 1 is
It is removed from the sorting shaft 5 by the jaws 6, 7 and is pressed radially against rollers 16, 17 which serve as stops.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the invention, and FIG. 2 is a side view partially showing another embodiment of the invention. 1: Workpiece 2: Depth of cut 3: Workpiece inner surface 4: Frame 5: Drive device (rotation adjustment shaft) 6.7: Jaw 8: Workpiece outer surface 9.10: Stopper 11: Cross beam 12.13, 14, 15: Elastic layer 16. 17: Roller (stopper) Patent applicant: Getsue AG Agent: Tadashi Wakabayashi

Claims (1)

[Scope of Claims] 1) A positioning device for workpieces, in particular piston rings which can be arranged one on top of the other, and which is provided with markings in the area of its peripheral surface, comprising:
In a positioning device with a drive for moving the workpiece in the circumferential direction, an identification device and a holding device, the workpiece (1) can be removed radially from the drive (5) and the stoppers (9, 10 , 16, 17) A positioning device for a non-circular workpiece. 2) The workpiece is moved by means of jaws (6, 7) which, viewed in the circumferential direction, are arranged side by side next to the drive (5) and can be fed synchronously in the radial direction towards the workpiece (1). Claim 1, wherein the object (1) is removable from the drive device (5).
Apparatus described in section. 3) The device according to claim 1 or 2, which is capable of pressing the workpiece (1) against two stoppers (9, 10) provided in a prismatic shape. 4) The device according to claim 1 or 2, wherein the stoppers (16, 17) are formed in the form of rollers. 5) The jaws (6, 7) are provided on the inner peripheral surface (3) of the workpiece (1), and the stoppers (9, 10, 16, 17) are provided on the inner peripheral surface (3) of the workpiece (1).
) is provided on the outer circumferential surface (8) of claim 1.
The device according to any one of Items 1 to 4. 6) Workpiece (1) with jaws (6, 7) and/or stops (9, 10, 16, 17) arranged in the axial direction
6. A device according to claim 1, wherein the axial length of the device is substantially equal to the axial length of the device. 7) A device according to any one of claims 1 to 6, in which the jaws (6, 7) are connected to each other (11). 8) Device according to any one of claims 1 to 7, in which the stops (16, 17) are connected to each other. 9) Jaws (6, 7) and/or stoppers (9, 10,
9. Device according to claims 1 to 8, in which the elastic layer (16, 17) is covered by an elastic layer (12, 13, 14, 15). 10) according to any one of claims 1 to 9, in which the stoppers (9, 10, 16, 17) are repositionable in the direction of the corresponding peripheral surface (8); Device. 11) The device according to any one of claims 4 to 10, wherein the axial spacing of the rollers (16, 17) is adjustable. 12) Device according to claim 11, characterized in that at least one roller (16, 17) is drivable. 13) Device according to claim 11 or 12, characterized in that at least one roller (16, 17) is eccentrically drivable. 14) The rollers (16, 17) move the workpiece (
14. The device according to any one of claims 11 to 13, which is used for driving the item 1) and is also formed as a stopper surface.