FI57708B - PRECISIONSMAETANORDNING FOER CYLINDRISKA FOEREMAOL - Google Patents

Description

RSrTl γβ1 μ ή υ Ltuusj u LKAisu cr? «JSBTl & LBJ UTLÄGGNINGSSKRIPT 5 770 8 C (45) Patent ayonnetty 10 10 1980 L4Qiiv Patent cneddelat v * '(51) Kv.ik? / N» ta3 B 24 B 49 / 00 ENGLISH I - FI N LAN D (21) P * t «mlh« k * nw * —Ht * ntun * ftknJng 78081 + 1 (22) Hftkemfopiivi — Anaöknlngidtg 17-03 · 78 (23) Altntpllvl — GlMglMttdag 17-03 -78 (41) Tullut lulktolcsi - Blhrlt offmtllg 1Ö. 09.79 register groupings (44) NihtMWp ™). k »« l.jull «Tam pvm.-

Petent- och registerstyrelsen '/ AmMcm uttagd och utUkrtfwn publieurad 30.06.80 (32) (33) (31) Pyydttty «Tuoikaus — Begird priorlt · * (71) T: mi Johde, Korppaantie 3 B, 00300 Helsinki 30, Finland-Finland (Fl) (72) Kauko Hakkarainen, Helsinki, Finland-Finland (FI) (Jh) CG Gädeke (54) Precision measuring device for cylindrical objects - Precisionsmätanordning för cylindriska förem & l

The invention relates to a precision measuring device for cylindrical objects, in particular large rolls, e.g. paper machine rolls, which is electronically operated and equipped with a digital display and a printer device, and which can be mounted on a fixed centrifugal grinder or lathe carriage and perpendicular to the roll. However, the basic idea of the invention is that due to the structure of the measuring device itself, the measuring device itself does not follow the direction of the carriage in a straight line, but the surface of the roll to be measured.

The practice so far in measuring the diameter of large cylinders has mainly been the so-called on the rider and mechanical micrometers, in which case the measurement result has been inaccurate. Attempts have also been made to use an electronic measuring instrument in connection with a rider, but the result has been unsatisfactory due to the structure of the device and human actions. It was also not possible to measure up to the end edge of the roll. In particular, the paper industry and the quality of paper in modern high-speed machines have suffered from deformed rollers.

The object of the present invention is to provide a highly accurate roll measuring device, which has been developed over the years in cooperation with roll grinders and which consists of several solutions known per se, which together form a new, accurate whole.

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The device according to the invention is mainly characterized in that said measuring arc is provided with three tips with a rotating roller, namely an electronic measuring tip spring-loaded against the roll on one side of the roll, a fixed but adjustable counter-tip on the opposite side of the roll, and a fixed but the gauge with its own (reduced) weight rests against the roll, that due to the ball bearing structures the gauge is easily movable both in the longitudinal direction of the gauge shaft and around the horizontal pin, i.e. in both vertical and horizontal magnification, so it closely follows the roll surface even during roll rotation, e.g. the dipstick with its measuring devices is supported by a support column, which in turn can be attached to the carriage of a fixed-center grinder or lathe by means of a stand, and the weight acting on the dipstick roll is reduced in itself with a known adjustable counterweight.

The invention will now be described in more detail with reference to the accompanying drawing, which shows an embodiment of the invention.

Attached to the measuring arc 1 are three tips with a pivoting roller 2, namely a measuring tip 4 movable at the electronic measuring head 3, spring-loaded against the roll 5 (indicated by broken lines), a counter tip 6 on the opposite side of the roll, fixed horizontally and longitudinally 7, which is fixed to a vertically adjustable rod and on which the measuring arc 1 rests against the roll 5. Tip rods 6 and 7 are provided with scales and fixing screws. The rollers 2 are mounted by ball bearings on tip pieces 8, which are likewise fixed by ball bearings at the ends of the tip rods 4, 6 and 7 so as to be free to pivot about the center line of said rods. The rollers 2 are eccentric with respect to the center line of the rods, so that they, like the grand piano legs, always settle in the right direction with respect to the direction of movement.

The measuring arc 1 is a housing structure and is filled with pre-cooked styrofoam granule and swollen with steam to dampen vibrations. The measuring arc 1, which is provided with a handle 9, can be easily changed to a different size because it is attached to the sliding arm 10 by a mounting bracket 11 and a steering wheel screw 12. The sliding arm 10 is also a housing structure and is formed at one end by a slide carriage with 16 roller bearing rollers. moves along the rectangular slide tube 13. The other end of the slide tube 13, which is ground 3,5708 and hard sintered steel, is mounted on a support piece 14 by a horizontal pin 15 and ball bearings. An arm 16 is fastened to the slide tube 13 by two bolts, in the figure of which a counterweight 17 of the measuring arc 1 is movably attached to the right side.

The entire above-mentioned combination, the measuring arc 1, the sliding arm 10, the slide tube 13 »arm 16 and the counterweight 17, is thus pivotable around a horizontal pin 15 and the measuring arc 1 and the sliding arm 10 with slide slides are further supported by roller bearings sliding along the slide tube 13. is easily movable in each direction in a plane perpendicular to the pin 15 and the roller 5.

Said measuring device support piece 14 is movably attached to the support column 18 so that the support piece 14 with a cylindrical opening corresponding to the diameter of the support column 18 and a vertical gap is raised or lowered to the desired height by means of a screw spindle 19 and a palm or the arm is left behind the arm 16 in the drawing). The height position of the support column 18 relative to the base 22 can also be adjusted and fixed by means of a screw and an arm 23. The base 22 may be bolted to the roller grinder or lathe carriage. The movement of the measuring arc 1 and the sliding arm 10 along the slide tube 13 can be limited by means of stops 24 movable along a rod, one end of which is attached to the slide slide of the sliding arm 10 and the other end to the support column end of the slide tube 13.

The electronic measuring head 3 continuously provides measuring results via a line 25, which partly passes inside the measuring arc 1, to a display box 26, which may be located anywhere, but in this case is fixed in a visible position to the upper end of the support column 18 by means of a support arm 27. The display box 26 has a 7-segment digital display 28 with 16 mm high let letters and in addition a printer that writes the measurement results to the paper strip 29. The writing speed can be adjusted in a range of 3 times / sec by clock timing and by means of a steering wheel. - 1 time / 2 min. The measuring range for the roll diameter is 300 mm to 1500 mm and the measuring accuracy is 0.01 mm to 0.002 mm.

In the drawing, the outlines of the parts are shown in broken lines with the roll 5 in an anomalous position. Such a position is, of course, exaggerated, in reality it is only a matter of 100 parts by mm, it just shows how the parts move. The measuring tips 4 and 6 thus press against the roll 5 by the force of the helical spring at the measuring head 3 and the support tip 7 by the weight of the moving parts (reduced by the counterweight 17).

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Regarding the details of the device, it should be mentioned that the rollers 2 in this case are cylindrical and are equipped with scrapers made of a thin (0.02 mm) steel plate, which always keep the rollers 2 clean.

As mentioned at the beginning, electronic measuring instruments for hand-pushing have been used so far to measure rolls. in the case of riders whose measurement accuracy currently reaches the same as that of the measuring device according to the invention, but are more limited and slower in use. Compared to these devices, the measuring device according to the invention achieves the following advantages: The device makes it possible to center the roll on a grinder, measure only with an electronic measuring tip (horizontal movement of the measuring arc locked) at both ends of the roll and center the roll according to measurement results.

- Because it is possible to measure with the device while the roll is rotating and during machining, defects in the roll can be easily corrected.

- The device can perform both roll curvature and oval or throw measurements.

- It is also possible to measure the wet roll with the device, there is no need to dry the roll in between.

- The measuring, counter and support tips are not abrasive, but are based on swiveling rollers, so the surface of the roller is not damaged and no dirt accumulates on the site (thanks to the scrapers).

- Thanks to the design of the rollers, the surface of the roll can be measured all the way to the end edge of the roll and the roll can also come over the end edge to the surface of the roll (provided that the roll is in a suitable position).

- The measuring arches are light and easy to cast to a smaller or larger size.

It is clear from the above that the precision measuring device according to the invention achieves a significant time saving, especially when the roll does not have to be stopped and dried during the measurement. In addition, it should be noted that in this way, oval defects can be eliminated as accurately as possible during the grinding step.

Claims (3)

1. Precision measuring device for cylindrical objects, especially for large rollers, e.g. paper machine rollers, which device operates electronically and is provided with a digital indication (28), a printed printer device (29), and which can be attached to the sledge of a centered grinding machine or lathe, and which device is provided with a plane perpendicular to that below measurement being the roll (5) movable measuring cup (1), characterized in that three tips (4, 6, 7) provided with the pivot rollers (4) are attached to said measuring cup (1), namely one at the roll (5). one side located against the roller spring-loaded electronic measuring tip (4), a fixed but adjustable counterpoint (6) located at the opposite side of the roller (5) and a highest point located at the top of the roller (5) by means of which the adjustable support tip (7) the measuring cup (1) with its own (lightened) weight rests on the roller (5), the measuring cup (1) with the aid of ball bearing structures is easily movable longitudinally in the longitudinal direction of the measuring cup (1) sliding arm (10) and about a horizontal pin (15) , or thus bed in the vertical and road-right direction, so that it no The surface of the roller (5) also closely follows-under the rotation of the roller, e.g. during processing, the measuring cup (1) and measuring instruments are supported by a support pillar (18), which in turn can be fixed by means of a base (22) to the sledge of a fixed-center grinding machine or lathe, and that the measuring cup (1) against the roller (5) ) effective weight is relieved by an adjustable counterweight (17) known per se. Measuring device according to claim 1, characterized in that the measuring cup (1) is fixed by means of a fastening screw (11) and a steering wheel screw (12) to a sliding arm (10), at whose other end there is formed a slide bearing sliding bearing, which is lightweight and accurately movable along a square sliding tube (13), the other end of which is supported by a support piece (14) with the aid of a horizontal pin (15) and ball bearing, whereby as a continuation of the sliding tube (13), on the other side of the support piece (14) there is a continuation arm (16) and a counterweight (17) which is slidably attached thereto, and that the support piece (14) is slidably mounted on the support pillar (18) in height. Measuring device according to claim 1, characterized in that the pivotable rollers (2) with ball bearings are mounted on the tip pieces (8), which are also attached with ball bearings to the ends of the tip rods (4,6,7) so that they are freely pivotable about the center line of the rods and that the rollers (2) are eccentric with respect to this center line, whereby they always point in the right direction, and that the rollers (2) are additionally provided with two (0.02 mm) scrapers.