GB2080953A

GB2080953A - Checking the Alignment of Several Bores, in Particular Bearing Bores, Located One Behind the Other

Info

Publication number: GB2080953A
Application number: GB8120683A
Authority: GB
Original assignee: Maschinenfabrik Weingarten AG
Current assignee: Maschinenfabrik Weingarten AG
Priority date: 1980-07-04
Filing date: 1981-07-03
Publication date: 1982-02-10
Also published as: FR2486227A1; DE3025343A1; GB2080953B; DE3025343C2

Abstract

A target 16 sightable through a straight line setting telescope for checking the alignment of a plurality bores e.g. bearing bores, located one behind the other, is arranged to be vertically adjustable on a base member 2 thereby obviating the necessity for separate targeted machined bushes in the separate bores. Cylinders 3 support the base 2 in a bore, and the vertical position of the target 16 on pillars 4, 6 determined by conventional gauge blocks 8 is fixed by a screw 9 adjustable in a beam 13 secured to the pillars. For larger bores a larger base member may be provided, the base member 2 carrying the target 16 being supported thereby. <IMAGE>

Description

SPECIFICATION Measuring Mark Pick-up for Checking the Alignment of Several Bores, in Particular Bearing Bores, Located One Behind the Other The invention relates to a measuring mark pick-up for checking the alignment of several bores, in particular bearing bores, located one behind the other.

For a troublefree shaft bearing, which particularly in the case of larger machine tools may consist of several bores located one behind the other, it is necessary that the individual bores align with each other exactly. For the insertion and machining of the bearing bushes to be inserted in the bore, it is necessary to check to what extent alignment errors exist between the individual bores. For this purpose one uses a straight line setting telescope, which is aligned with the centre point of the reference bore. A deviation from the reference value was hitherto ascertained due to the fact that so-called measuring marks were incorporated in steel bushes which were inserted in the corresponding bore.Since the most varied bore hole diameters occur especially in the case of single-part production, separate bushes for the measuring marks thus had to be produced, which required an enormous' consumption of time and materials.

This is where the present invention comes into being and the objective of the latter is to develop an apparatus which in a simple manner by way of the actual diameter of the bore aligns the measuring mark exactly with the centre of the bore, without a separate apparatus being necessary for each individual bore.

This is achieved according to the present invention with a measuring mark pick-up of the afore-described construction due to the fact that the measuring mark pick-up is arranged to be vertically adjustable on a base member.

Rollers or cylinders are arranged in the lateral marginal regions of the base member for an exact support.

Further features of the invention are described in sub-claims 3 to 8.

Due to the ability of the measuring mark pickup to be adjusted vertically, the use of the latter is ensured in the most varied bores. For other manufacturing reasons, gauge blocks are available in any workshop, in which case the distance of the centre point of the measuring mark from the base member of the measuring mark pick-up according to the invention can be calculated in the simplest manner from the dimensions given.

If the measuring mark pick-up is to be inserted in a considerably larger bore, then an additional bridge is simply provided according to the invention.

It is thus possible to cover all possible bores with a relatively small apparatus in conjunction with bridges of various sizes.

The invention is described in detail with reference to the drawings illustrating a preferred embodiment: Figure 1 is a side view of the measuring mark pick-up, partly in section, Figure 2 is a corresponding front view likewise partly in section and Figure 3 is a front view of the measuring mark pick-up using an additional bridge.

The measuring mark pick-up 1 consists essentially of a mounting support 1 5 in which the actual measuring mark 16 is fixed with a threaded ring 17. The mounting support 1 5 is guided on two guide pillars 4 and 6, which are in turn fastened in a base member 2 for example by means of a threaded pin 7. Rollers or cylinders 3 are located in the lateral lower marginal regions of the base member 2, which rollers are attached for example by means of a cheese-head screw to the base member 2. The reference numerals 8 designate gauge blocks, the gauge and number of which is chosen so that the value X results, which can in turn be ascertained by calculation in the simplest manner.According to the arrangement of the corresponding gauge blocks 8, the measuring mark pick-up 1 is then fixed by a cheese-head screw 9, which is mounted in a cross-member 1 3.

The general equation

serves for calculating the height X of the gauge blocks u.

In this case,

in which case d, designates the bore hole diameter. All other values are given by the construction. X is thus

If the apparatus is to be inserted in a larger bore, then as shown in figure 3, it can be provided with a bridge 12, which in turn comprises rollers or cylinders 14 in the lateral marginal regions. The bridge 12 and base member 2 can be connected by a screw, for which suitable bores 18 and 19 are provided.

Claims

1. Measuring mark pick-up for checking the alignment of several bores, in particular bearing bores located one behind the other, wherein the measuring mark pick-up is arranged to be vertically adjustable on a base member.

2. Measuring mark pick-up as claimed in claim 1, wherein the base member comprises rollers or cylinders in its lateral marginal regions.

3. Measuring mark pick-up as claimed in claim 1 or 2, wherein the rollers or cylinders have an equal spacing with respect to a vertical line passing through the centre of the measuring mark.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Measuring Mark Pick-up for Checking the Alignment of Several Bores, in Particular Bearing Bores, Located One Behind the Other The invention relates to a measuring mark pick-up for checking the alignment of several bores, in particular bearing bores, located one behind the other. For a troublefree shaft bearing, which particularly in the case of larger machine tools may consist of several bores located one behind the other, it is necessary that the individual bores align with each other exactly. For the insertion and machining of the bearing bushes to be inserted in the bore, it is necessary to check to what extent alignment errors exist between the individual bores. For this purpose one uses a straight line setting telescope, which is aligned with the centre point of the reference bore. A deviation from the reference value was hitherto ascertained due to the fact that so-called measuring marks were incorporated in steel bushes which were inserted in the corresponding bore.Since the most varied bore hole diameters occur especially in the case of single-part production, separate bushes for the measuring marks thus had to be produced, which required an enormous' consumption of time and materials. This is where the present invention comes into being and the objective of the latter is to develop an apparatus which in a simple manner by way of the actual diameter of the bore aligns the measuring mark exactly with the centre of the bore, without a separate apparatus being necessary for each individual bore. This is achieved according to the present invention with a measuring mark pick-up of the afore-described construction due to the fact that the measuring mark pick-up is arranged to be vertically adjustable on a base member. Rollers or cylinders are arranged in the lateral marginal regions of the base member for an exact support. Further features of the invention are described in sub-claims 3 to 8. Due to the ability of the measuring mark pickup to be adjusted vertically, the use of the latter is ensured in the most varied bores. For other manufacturing reasons, gauge blocks are available in any workshop, in which case the distance of the centre point of the measuring mark from the base member of the measuring mark pick-up according to the invention can be calculated in the simplest manner from the dimensions given. If the measuring mark pick-up is to be inserted in a considerably larger bore, then an additional bridge is simply provided according to the invention. It is thus possible to cover all possible bores with a relatively small apparatus in conjunction with bridges of various sizes. The invention is described in detail with reference to the drawings illustrating a preferred embodiment: Figure 1 is a side view of the measuring mark pick-up, partly in section, Figure 2 is a corresponding front view likewise partly in section and Figure 3 is a front view of the measuring mark pick-up using an additional bridge. The measuring mark pick-up 1 consists essentially of a mounting support 1 5 in which the actual measuring mark 16 is fixed with a threaded ring 17. The mounting support 1 5 is guided on two guide pillars 4 and 6, which are in turn fastened in a base member 2 for example by means of a threaded pin 7. Rollers or cylinders 3 are located in the lateral lower marginal regions of the base member 2, which rollers are attached for example by means of a cheese-head screw to the base member 2. The reference numerals 8 designate gauge blocks, the gauge and number of which is chosen so that the value X results, which can in turn be ascertained by calculation in the simplest manner.According to the arrangement of the corresponding gauge blocks 8, the measuring mark pick-up 1 is then fixed by a cheese-head screw 9, which is mounted in a cross-member 1 3. The general equation serves for calculating the height X of the gauge blocks u. In this case, in which case d, designates the bore hole diameter. All other values are given by the construction. X is thus If the apparatus is to be inserted in a larger bore, then as shown in figure 3, it can be provided with a bridge 12, which in turn comprises rollers or cylinders 14 in the lateral marginal regions. The bridge 12 and base member 2 can be connected by a screw, for which suitable bores 18 and 19 are provided. Claims

4. Measuring mark pick-up as claimed in any one of claims 1 to 3, wherein the measuring mark pick-up is arranged to be vertically adjustable on two guide pillars.

5. Measuring mark pick-up as claimed in any one of claims 1 to 4, wherein the accurate vertical adjustment is achieved by means of gauge blocks which are located between the measuring mark pick-up and the base member.

6. Measuring mark pick-up as claimed in any one of claims 1 to 5, wherein fixing of the measuring mark pick-up is achieved after adjustment by the gauge blocks by way of a cheese-head screw, which is guided in a cross-bar interconnecting the guide pillars.

7. Measuring mark pick-up as claimed In any one of claims 1 to 6, wherein the measuring mark pick-up device is detachably connected to a bridge, which extends beyond the lateral dimension of the base member of the actual measuring mark pick-up.

8. Measuring mark pick-up as claimed in claim 7, wherein the bridge is also equipped with rollers or cylinders.

9. Measuring mark pick-up, substantially as herein described with reference to and as illustrated in the accompanying drawings.