DE8007959U1 - Outside diameter measuring device - Google Patents

Description

- 1 outside diameter measuring device .

The innovation relates to a device for measuring the
Outside diameter of ring-shaped workpieces, in particular of radial shaft sealing rings, consisting of
two opposing stops, of which f

one connected to a measuring device and the other jf

is radially adjustable in relation to the workpiece, and- \

at least one other, also adjustable, connection:

beat in the form of a roll that is roughly in the middle *

between the first two attacks and around halfway
Workpiece diameter is offset laterally to it.

It is common knowledge to use measuring instruments as they are

have been written to measure the outside diameter §

of ring-shaped workpieces, especially radial - |

Shaft seals to be used. These show as measuring inputs i;

set on measuring cutting edges, which on the one hand only have to be used once

can be turned, i.e. after wear of the \

Support surface are thrown away, as reworking §

is too expensive and, on the other hand, no exact input |

hold the knife edge parallelism. Furthermore |

disadvantageous in the above device can be seen. I.

that for adjustment to the outside diameter to be measured one |

Adjusting discs with very fine steps (approx. 1 mm) |

are necessary, the with a diameter to be measured |

range from approx. 15 mm to approx. 250 mm for housing |

result in a multitude of tool cabinets. ; f

Another disadvantage is the high cost factor for the | Acquisition or replacement of damaged setting discs |

ben see. The adjustable measuring insert and the stop |

are cumbersome when adjusting the pre- i

ί - 2 -

f; direction to a certain diameter to the respective

I have brought up the adjusting disk and then fastened it. I Furthermore, the dimensions of the shim must also be included in the

I. Measurement result can be recorded. This results in a re-

I 5 relatively tedious adjustment of the device, which I especially when the workpiece diameter is changed frequently

ii has an adverse effect.

I The innovation is based on the task of a device I 10 according to the generic part of the main protection claim

j ·· with simple means in such a way that the prior

I essentially eliminated the disadvantages described

k the.

15 This object is achieved according to the innovation in that the roller and the radially adjustable stop in a defined Relationship to each other can be delivered together on the workpiece, such that for a one-time adjustment the device to a certain diameter instead

20 is worked directly with gauge blocks with adjusting washers. This results in both a considerable reduction in costs and ease of use when setting up the Contraption.

The roller is preferably inclined at about 45 ° to the two opposing stops Slotted hole can be guided. In order to achieve a positive guidance of the role, that is, that the role and the stop move together this can be done using a lever system with the

30 be connected radially adjustable stop. An elongated hole is also made in the lever. The lever is like that integrated into the device that the two long

holes form an angle of about 90 "to each other. This Angular ratio is necessary to ensure a trouble-free, so do not allow hooking movement of the role.

As already mentioned, in order to obtain a simple geometry, there is an angular offset of 45 ° to the two stops preferred. This ensures that the roller is always in the middle between the two stops regardless of which diameter range is approached. The ratio in which the roller to the radially adjustable The stop must be adjusted radially, is 1: 2 with a 45 ° arrangement, but here not the one in the elongated hole traveled distance is addressed.

Notwithstanding this 45 ° arrangement, there is also the possibility of the roller at a different angle, for example 30 "in relation to the two stops, although it is not absolutely necessary that the role then always engages in the middle between the two stops on the workpiece. In this case it is only important that the second elongated hole in the lever is also arranged at an angle of 90 ° to the first elongated hole.

The delivery of the stop and the role can be solved in different ways. For one thing, it offers based on the preferred form of the device, a purely mechanical solution, whereby the lever system is connected to a feed device in the form of a threaded rod. This can be done after the adjustment Lever system can then be locked in the predetermined position in order to eliminate measurement differences. The lock takes place so that the lever system with at least one

Another guide rod is connected, which runs parallel to the threaded rod.

As a further solution, in addition to the electrical one, that is, one that interacts with the adjustable stops Motors, hydraulic or pneumatic delivery options which can be used in particular for mass testing.

It is also proposed that the two opposite stops with interchangeable inserts, in particular Hexagonal inserts, to be provided. On the one hand, they are cheaper to buy than conventional ones Cutting edges and on the other hand with wear up to

t5 can be used three times.

According to a further idea of the innovation, the two opposing attacks in relation to the Workpiece height adjustable in the axial direction without changing its parallelism. This can be done by a Fine drive happen, which can be formed by a threaded rod with a very low pitch. Other possibilities, such as hydraulic or pneumatic delivery are also conceivable.

This height adjustability has the great advantage that workpieces, but especially radial shaft sealing rings can be measured with a circumferential approach. This is done in such a way that with such workpieces diä both stops axially so far from their basic setting adjusted so that the resulting difference in the axial thickness of the shoulder on the shaft seal

speaks, so this can easily be pushed under the stops.

In order to display or evaluate the measurement result, in addition to conventional dial gauges, in which the one stop is connected to a button, inductive or capacitive displacement transducers are also used, with the Displacement sensors have the advantage that their output signals are sent to a downstream computer can, which can sort out the rejects faster than the human, especially in the case of mass testing Eye by reading the dial gauge.

The innovation is shown in the drawing and is described in more detail below. Show it

Figure 1 schematic diagram of the measuring device Figure 2 representation of the lever system FIG. 3 Simplified representation of the mode of operation of the measuring device

The device 1 shown in Figure 1 consists essentially of a plate 2 on which at a distance to each other two opposing stops 3.4 and a stop roller 5 are arranged. The stops 3.4 have inserts 6.7, which the service life of the Increase device 1 by using it several times. The stop 3 is via a button 21 with a dial gauge 8 connected, while the stop 4 is arranged at the free end 9 of a lever 10. The stop roller 5 is can be guided in an elongated hole 11 running at an angle of approximately 45 ° to the stops 3, 4. The radial to be measured - white

Lendichtring 12 is at three points 13,14,15 with his Circumference on the corresponding surfaces 3, 4, 5 and is therefore statically determined. The ring 12 is as shown placed against the yielding stop 3 in the device 1, and the dial gauge 8, which has been previously calibrated indicates whether the ring 12 is within the tolerance range or not. The lever system 16 is shown in dashed lines, About which the stop roller 5 in the elongated hole 11 on the to be measured ring 12 can be guided. The levers 10 and 10 are connected to one another and by a threaded rod 17 can be advanced in the direction of the ring 12. With a locking body is referred to, the one time on a certain Diameter set parts 3.5 attached to further guides 19.

For measuring radial shaft rings with radially protruding Approaches there is the possibility of axially relating the stops 3, 4 by means of a fine drive 30 to adjust on the workpiece that the approach is easily guided under the stops 3.4.

In Figure 2, the lever system 16 is shown, which has an elongated hole 20, which is 90 ° in the installed state the slot 11 is and the stop roller 5 leads.

25th

FIG. 3 shows a simplified representation of the mode of operation of the device 1 shown in FIG. 1. Indicated are two different workpiece diameters 22.23, which are arranged between the stops? 4.25 and 24.25 ' are. The third stop 26,26 'is located in the middle between the two Hitiin'ler opposite Stops 24.25 and is around half the workpiece

diameter laterally offset. The stop 26.26 ' can be guided along the line 27, which runs at an angle of approximately 45 ° to the two stops 24, 25. In this way it is ensured that triangles 28,29 with a right angle can always be formed in the system while the other two angles complement each other equally (45 ° each). As a result, the stop 26,26 ' always in the midst of the other two attacks 24.25 and 24.25 'al "the circumference of the workpieces 22.23 attacks.

The delivery ratio a: b, which is necessary for the interpretation of the Lever system 10.16 (Figure 1) is decisive, is 1: 2 in the device mentioned, that is with a workpiece change from 22 to 23, the full diameter difference b at the stop 25 'is in the downward movement a, while at the stop 26 'there is only half the difference in diameter in the downward movement along the Line 27 makes up.

As already mentioned, there is of course the possibility to change the angle for the third stop 26 between the two stops 24, 25, with others Requirements for the interpretation of the lever 10.16 result.

Claims (1)

• ♦ * f · • · · · t t - 1 protection claims: . Device for measuring the outer diameter of ring-shaped workpieces, in particular radial shaft service rings, consisting of two, each other opposing attacks, one of which with connected to a measuring device and the other 1n is radially adjustable with respect to the workpiece, and at least one further, also adjustable stop in the form of a role, which is approximately in the . Center between the first two stops and offset to the side by half the workpiece diameter located, characterized in that the roller (5) and the stop (4) in a defined Ratio to each other can be delivered together on the workpiece (12). . · Device according to claim 1, characterized in that the roller (5) is at approximately 45 ° to the stops (3, 4) inclined elongated hole (11) in a base plate (2) can be guided. . Device according to claims 1 and 2, characterized in that the stop (4) and the Roller (5) are connected to one another via a lever system (16). . Device according to claims 1 to 3, characterized in that the lever system (16) also has an elongated hole (20). . Device according to claims 1 to 4, characterized characterized in that the elongated holes (11, 20) are arranged offset from one another by 90 °. . Device according to claims 1 to 5, characterized in that the lever system (16) with a delivery device (17) is connected. . Device according to claims 1 to 6, characterized characterized in that the feed device (17) consists of a threaded rod. . Device according to Claim 7, characterized in that the stop (4) and / or the roller (5) after adjustment to a workpiece diameter to be measured on at least one further guide rod (19) can be locked. . Device according to Claims 1 to 5, characterized in that the delivery of the stop (4) and the roller (5) takes place hydraulically or pneumatically. . Device according to Claims 1 to 9, characterized in that the two opposite Stop (3, 4) are formed from interchangeable inserts. . Device according to claims 1 to 10, characterized in that the two opposite Stops (3, 4) are adjustable in height in relation to the workpiece (12) in the axial direction. . Device according to claims 1 to 11, characterized in that the height adjustment by means of a fine drive takes place.