CN201094018Y

CN201094018Y - Flatness testing apparatus

Info

Publication number: CN201094018Y
Application number: CNU2007200546105U
Authority: CN
Inventors: 卜育才
Original assignee: Guangzhou Shipyard International Co Ltd
Current assignee: Cssc Offshore & Marine Engineering Group Co ltd; Guangzhou Shipyard International Co Ltd
Priority date: 2007-07-25
Filing date: 2007-07-25
Publication date: 2008-07-30
Anticipated expiration: 2017-07-25

Abstract

The utility model discloses a planeness detecting device which is provided with a cylinder, wherein, the side of the cylinder is provided with an otic placode, an adjusting bolt is screwed on the otic placode by threads, the inner part of the otic placode is provided with a shaft lever which is fixed inside the otic placode by a bearing, the upper end of the shaft lever is provided with two balance arms extending towards two sides, the bottoms of the balance arms are provided with flat and straight guide way with high planeness, the guide way is perpendicular to the shaft lever and is provided with a measuring instrument which can slide on the guide way. The superposition of the center line of the shaft lever and the reference line can be adjusted by adjusting a bolt, thereby ensuring that the guide way is parallel to an ideal plane; the measuring instrument is moved to different positions on the guide way and the shaft lever is rotated, therefore, the difference of the distance of each point on a circumference with different radius from the guide way can be detected, thereby measuring the planeness of the plane to be detected. The planeness detecting device has small number of parts, simple structure and low cost; the difference of the distance of each point on the measuring plane from the guide way is used to measure the planeness; so long as the plane accuracy of the guide way is high, the accuracy of the measuring instrument is high and the accuracy of the planeness measurement can be high.

Description

A kind of flatness checking device

Technical field

The utility model relates to a kind of device that is used for the flatness of detection plane.

Technical background

In the construction of main equipments such as boats and ships, some main equipment need be installed on the platform of the very high large-scale seat of flatness requirement degree, these large-scale seat bottoms are welded in Ship Structure usually or the end is taken, again platform is carried out plane processing after it can weld, also can carry out welding again after the processing of plane to its platform earlier.Carry out plane processing after the welding again, need that the large scale computer process equipment is transported to the working-yard and process, it can guarantee the flatness of large-scale seat platform, but needs the carrying large process equipment to the working-yard, comparatively consuming time and effort.And welding again after the seat platform being carried out plane processing does not then need to carry process equipment to the working-yard, and is more convenient and laborsaving, but the flatness of its platform can be difficult to because of the distortion that welding produces guarantee.For whether definite flatness of welding the platform of the large-scale seat in back meets the requirements, need carry out the measurement of flatness to the platform after the welding, existing measurement mechanism mainly contains vacuole formula level meter, dressing plate and laser measuring apparatus.Vacuole formula level meter, main by range estimation, it is not high that it measures precision, under the accuracy requirement condition with higher, can't adopt.Adopt dressing plate to measure the flatness of large-scale seat platform, then need to make very big dressing plate, dull and stereotyped area should be more approaching than the area of platform, can not be too small, in case flatness too small then can't measuring table integral body, and to make large-scale standard platform, its manufacture craft trouble, and expense is very high; Simultaneously large-scale standard platform easy deformation, its use and deposit all need very careful.Though laser measuring apparatus precision height, its apparatus expensive, complicated operation is had relatively high expectations to operating personnel, and it is very consuming time to measure the large scale plane.

The utility model content

The purpose of this utility model is to provide that a kind of cost is low, measuring accuracy can be very high, and can measure the flatness checking device on large scale plane.

Flatness checking device of the present utility model, include and sit tube, sit tube tube side otic placode is arranged, have on the otic placode by screw thread and revolve thereon adjusting bolt, sitting in the tube has axostylus axostyle, axostylus axostyle by bearing fixing in sitting tube, the balance arm that stretch oriented both sides, its upper end, the balance arm bottom is the high straight guide rail of flatness, and guide rail is vertical with axostylus axostyle, and the surveying instrument that can slide thereon is housed on the guide rail.

Flatness checking device of the present utility model, it is sat the tube tube and picks up the ears on the plate adjusting bolt is arranged, the center line of scalable axostylus axostyle overlaps with the vertical line of the ideal plane on tested plane, its axostylus axostyle by bearing fixing in sitting on the tube, axostylus axostyle can rotate relative to sitting tube, when surveying instrument is butted on the tested plane, measure on the circumference of surveying instrument place each point to the difference of the distance of guide rail by rotating shaft rod, by surveying instrument being moved to the guide rail diverse location, rotating shaft rod, both can measure the difference of the guide rail distance of having a few on each circumference, can calculate the flatness of lining face according to these differences, thereby determine whether flatness meets the requirements.Its component part is few, and is simple in structure, and cost is low.During measurement, it carries surveying instrument by axostylus axostyle and rotates, and surveying instrument can be measured the difference of the distance of the guide rail of having a few on its place circumference; Surveying instrument can move on guide rail, thereby as long as the circle that the guide rail rotation forms has covered whole tested plane, surveying instrument also is the flatness on the whole plane of energy measurement with regard to the difference of the guide rail distance of having a few in the tested plane of energy measurement.It comes measurement plane degree to guide rail apart from difference by each point on the measurement plane, as long as the plane precision height of guide rail, the precision height of surveying instrument, its measuring accuracy is just high, and the flatness of guide rail can guarantee high precision by finishing, surveying instrument also can be selected the high-acruracy survey instrument, thereby the precision of its measurement of planeness can be very high.In addition, balance arm and guide rail can be very long, thereby can measure the flatness on large scale plane.

Description of drawings

Fig. 1 is a kind of user mode synoptic diagram of flatness checking device;

Fig. 2 is a kind of user mode synoptic diagram of flatness checking device.

Embodiment

Embodiment 1, as Fig. 1, and a kind of flatness checking device, include and sit tube 1, sitting 1 side of tube has otic placode 2, has on the otic placode 2 by screw thread to revolve thereon adjusting bolt 3, and sitting in the tube 1 has axostylus axostyle 4, axostylus axostyle 4 is fixed in by bearing 5 to be sat in the tube 1, the balance arm 6 that stretch oriented both sides, its upper end, the balance arm bottom is the high straight guide rail 7 of flatness, guide rail 7 is vertical with axostylus axostyle 4, the surveying instrument that can slide thereon is housed on the guide rail 7, and surveying instrument is a dial gauge 8.

When its measurement has the plane of center pit 14, by draw in the center of center pit 14 one with the perpendicular line 15 in the ideal plane on tested plane, as datum line (the ideal plane level, datum line can be plumb line; When the ideal plane tilted, datum line was a vertical line); To sit in tube 1 installation and the center pit 14, the adjusting bolt 3 on its plate 2 of picking up the ears offsets with center pit 14, and axostylus axostyle 4 is placed in outside the datum line; By regulating the adjusting bolt 3 on the otic placode 2, the center line of axostylus axostyle 4 is overlapped with datum line; Dial gauge on the guide rail 78 bottoms and measured plane are pushed against, rotary shaft 4,6 years dial gauge 8 circular motion of balance arm are measured the difference to the distance of balance arm 6 of each point on the circumference; Move dial gauge along guide rail 7, rotary shaft 4 is measured on the circumference of different radii each point to the difference of guide rail 7 distances, by relatively all measure apart from difference, calculate the flatness on tested plane, thereby whether the flatness of judging tested plane meets the requirements.

When being used to measure the plane that does not have center pit 14,, need on tested plane, to fix a supplemental cartridge 13 earlier as Fig. 2, draw in the center of supplemental cartridge 13 one with the perpendicular line 15 in the ideal plane on tested plane, as datum line; Other is identical with the situation that center pit 14 is arranged.

The above-mentioned detection device component part is few, and is simple in structure, and cost is low.By each point on the measurement plane to guide rail apart from difference come the measurement plane degree, as long as the plane precision height of guide rail, the precision height of surveying instrument, the precision of the measurement of planeness just can be very high.Surveying instrument can also use surveying instruments such as micrometer caliper, laser range finder to substitute except dial gauge 8.In addition, for large-sized plane, as long as the size of balance arm 6 and guide rail 7 is enough with regard to energy measurement.

Overlap with datum line for the ease of adjusting axostylus axostyle 4 center lines, the different directions on axostylus axostyle 4 same section can be offered a plurality of adjustment holes 9 that are used to help to adjust the position.Whether calliper can deeply be adjusted in the hole, measure the axostylus axostyle center and overlap with datum line.

Pick-up unit uses certain hour rear rail 7 to be out of shape, not vertical with axostylus axostyle 4, may therefore need scrap or processing again, under the situation of guide rail 7 distortion, can not scrap and processing again in order to make, just can continue to use, can brace 10 be installed between axostylus axostyle 4 middle parts and balance arm 6 ends, brace 10 length are adjustable, the guide rail 7 of distortion can be evened up by the length of adjusting brace 10, thereby can continue to use.In addition, brace 10 can also play the distortion of certain inhibition guide rail 7.

Brace 10 can be two sections, spins by bolt 11 and nut 12.Also can be that the structure that screws can be pulled out in the end, it be prior art.

Claims

1. flatness checking device, it is characterized in that: include and sit tube (1), sit tube (1) tube side otic placode (2) is arranged, have on the otic placode (2) by screw thread and revolve thereon adjusting bolt (3), sit in the tube (1) axostylus axostyle (4) is arranged, axostylus axostyle (4) is fixed in by bearing (5) to be sat in the tube (1), the balance arm (6) that stretch oriented both sides, its upper end, the balance arm bottom is the high straight guide rail (7) of flatness, guide rail (7) is vertical with axostylus axostyle (4), and guide rail is equipped with the surveying instrument that can slide thereon on (7).

2. flatness checking device according to claim 1 is characterized in that: the different directions on axostylus axostyle (4) same section offers a plurality of adjustment hole (9).

3. flatness checking device according to claim 1 is characterized in that: brace (10) is installed, brace (10) adjustable length between the end of axostylus axostyle (4) middle part and balance arm (6).