CN111121670A - Laser measurement method for ship shafting - Google Patents
Laser measurement method for ship shafting Download PDFInfo
- Publication number
- CN111121670A CN111121670A CN201911205399.6A CN201911205399A CN111121670A CN 111121670 A CN111121670 A CN 111121670A CN 201911205399 A CN201911205399 A CN 201911205399A CN 111121670 A CN111121670 A CN 111121670A
- Authority
- CN
- China
- Prior art keywords
- shafting
- wire
- stern
- point
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
Abstract
The invention provides a laser measurement method for a ship shafting, which comprises the following steps: step 1, determining a theoretical central line of a shafting; step 2, measuring a shafting centerline stern target point A; and 3, measuring a bow reference point B in the center line of the shafting, and finally centering the shafting by using laser. The invention has the beneficial effects that: in the whole shipbuilding process, the data accuracy can be effectively improved, and the problems of inconvenient adjustment of laser equipment, unstable equipment, large section measurement error and the like are solved.
Description
Technical Field
The invention relates to the technical field of offshore drilling platforms, in particular to a laser measurement method for a ship shafting.
Background
The shafting stern tube measurement is a key link in the shafting installation process, and a change curve of the stern tube inclination is calculated by measuring a series of data before epoxy pouring and after epoxy pouring, so that the reliable operation of the ship shafting is guaranteed. The self-container ship is firstly built, the operation needs the manufacturer to use the tile tin blue to assist in measurement, the outside cooperation cost is increased, the condition of increasing the production period occurs, and the project propulsion is influenced. In order to enhance the production progress control, enhance the process management, carry out the intensive research of the process units in the electromechanical work area and develop the autonomous measurement test. The process group changes the measuring method from a piano wire drawing to laser measurement, but the problems of inconvenient adjustment, instable equipment, larger cross section measuring error and the like also occur.
Disclosure of Invention
In order to overcome the defects of the prior art, the technical scheme of the invention provides a laser measurement method for a ship shafting, which is realized through the following technical scheme
A laser measurement method for a ship shafting comprises the following steps:
firstly, adopting a steel wire drawing method to find out bow and stern points of a theoretical center line of a shafting on a left side and a right side, and then utilizing laser to carry out final centering on the shafting;
step 2, measuring a shafting centerline stern target point A; respectively hanging plumb lines on the hull plates at the left side and the right side of the FR-1 rib position, wherein the distance L is equal to the radius of a hanging line and the radius of a stay wire, and tying a line section on the vertical line by taking the hull division base line as a reference, wherein the line section is a stern target point A;
step 3, determining a fore datum point B of a center line of a shafting:
a foreign punching hole is punched beside a measuring mark point on the base line surface of the ship body, the distance L is equal to the radius of the suspension wire and the radius of the stay wire, when the plumb bob tip is aligned with the mark point, the stay wire should be tightly attached to the suspension plumb line, and the position of the bow reference point B is determined;
a stern stay pulley frame is arranged at the FR-2 rib position of the stern of the ship, the weight of a steel wire hanger is 15kg, a bow stay frame is arranged at the FR44 rib position of the port and starboard, and a light target support is arranged at the stay point of FR6+250 rib positions;
on a stern stay wire pulley frame arranged at FR-2 rib positions of a left side and a right side of a stern of a ship, a laser hole centering measuring device is placed, a laser point projection A point light target (FR21 rib position light target) projects a B target point light target, and the position of the laser hole centering measuring device is adjusted according to computer output parameters and then is fixed;
after the laser hole centering measuring device is positioned, the steel wire stay wires on the port and starboard sides can be detached.
The invention has the beneficial effects that: in the whole shipbuilding process, the data accuracy can be effectively improved, and the problems of inconvenient adjustment of laser equipment, unstable equipment, large section measurement error and the like are solved.
Drawings
FIG. 1 is a schematic drawing of a wire drawing process in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a bracket at a B point of a bow in the embodiment of the invention.
Fig. 3 is a schematic structural view of a stern point a bracket in the embodiment of the invention.
Fig. 4 is a schematic structural diagram of an application of the laser measurement method in the embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
A laser measurement method for a ship shafting comprises the following steps:
firstly, adopting a steel wire drawing method to find out bow and stern points of a theoretical center line of a shafting on a left side and a right side, and then utilizing laser to carry out final centering on the shafting;
step 2, measuring a shafting centerline stern target point A; respectively hanging plumb lines on the hull plates at the left side and the right side of the FR-1 rib position, wherein the distance L is equal to the radius of a hanging line and the radius of a stay wire, and tying a line section on the vertical line by taking the hull division base line as a reference, wherein the line section is a stern target point A;
step 3, determining a fore datum point B of a center line of a shafting:
a foreign punching hole is punched beside a measuring mark point on the base line surface of the ship body, the distance L is equal to the radius of the suspension wire and the radius of the stay wire, when the plumb bob tip is aligned with the mark point, the stay wire should be tightly attached to the suspension plumb line, and the position of the bow reference point B is determined;
a stern stay pulley frame is arranged at the FR-2 rib position of the stern of the ship, the weight of a steel wire hanger is 15kg, a bow stay frame is arranged at the FR44 rib position of the port and starboard, and a light target support is arranged at the stay point of FR6+250 rib positions;
on a stern stay wire pulley frame arranged at FR-2 rib positions of a left side and a right side of a stern of a ship, a laser hole centering measuring device is placed, a laser point projection A point light target (FR21 rib position light target) projects a B target point light target, and the position of the laser hole centering measuring device is adjusted according to computer output parameters and then is fixed;
after the laser hole centering measuring device is positioned, the steel wire stay wires on the port and starboard sides can be detached.
In the embodiment of the invention, an Easy-Laser flatness measuring device is adopted for Laser measurement.
The first embodiment is as follows:
as shown in fig. 1-3, in the embodiment of the present invention, the drilling platform or the ship is a biaxial system, and the shafting is composed of a propeller shaft (stern shaft), a propeller (with a fixed draft tube), a hydraulic coupling, a reduction gearbox, etc. The center of the surface of the propeller disk is positioned at FR6+250 mm, is 2850mm away from the baseline of the ship body and is above the baseline; the output flange end of the reduction box is at the rib position FR42+1144.8 and is 3627.6mm away from the baseline of the ship body. The total length of two shafting is 29.705m, the inclination angle of the shafting central line to the ship body base line is 1.5 degrees, and the two shafting central lines are symmetrically arranged with a distance of 8750mm from the midship line surface.
Firstly, a steel wire drawing method is adopted on the left and right sides to find out fore and aft points for determining a theoretical center line of a shafting. Then, final centering of the shafting is performed with laser. The wire drawing steel wire is a piano wire with the diameter phi of 0.8mm, a stern wire drawing pulley frame is arranged at the rib position FR-2 of the stern of the ship, and the weight of the steel wire hanger is 15kg (see figure 1). A bow stay (see figure 2) is arranged at the rib position of the FR44 on the port and the starboard. And arranging a light target bracket at a bracing wire point at the FR6+250 rib position (see figure 3).
Due to the characteristics of the ship, the screw propeller fixing guide pipe welded with the ship body is arranged at the stern part. Therefore, the stern stay wire pulley yoke is required to be provided with a steel wire stay wire hanging point and a platform for placing and fixing the laser collimator. When the guide pipe is installed and welded, the center displacement deviation of the guide pipe needs to be controlled by pulling a wire.
Step 2, adjusting the theoretical center line of the shafting by the steel wire stay wire
Determination of shafting centerline stern target point A
And (3) hanging plumb lines on hull plates of the ship at 8750mm positions away from midship line surfaces on left and right sides of the FR-1 rib positions respectively, wherein the hanging points can be moved left and right and fixed, the hanging plumb lines are required to be tightly attached to stay wire steel wires (ship split baselines), and the plumb lines are respectively positioned at the same sides of the two split baselines. Namely, a foreign hole is punched beside a measuring mark point on the base line surface of the ship body, and the distance L is equal to the radius of the suspension wire plus the radius of the stay wire steel wire. When the plumb bob tip is aligned with the mark point, the stay wire steel wire is tightly attached to the plumb line. At the FR6+250 rib position, taking the hull part base line as a reference, taking H-2850 mm (error is +/-0.5) on the vertical line to form a line joint, and the line joint is a stern target point A.
And a wire pulling steel wire on the heavy pulley is hung on the wire pulling frame, the wire pulling steel wire is tightly attached to a plumb line by means of left and right movement of the adjusting device, and the light target is moved to enable a steel wire node of the positioning wheel to be intersected with a light target point A, so that the stern target point is initially positioned.
Measuring axial center line bow datum point B
A round hole plate is arranged on a wire pulling frame respectively arranged on bottom panels in a ship body on the left side and the right side at a position 8750mm away from a centerline plane at FR43+345 rib positions of a propulsion cabin, piano wires penetrate through a hole with the diameter of phi 1mm in the center of the hole plate, and the position adjustment of the steel wire wires is realized by adjusting the position of the hole plate by an adjusting bolt.
According to the size of an installation drawing (M50203-425 and 001 shafting arrangement drawing), the distance H from the baseline of the hull at the rib position FR43+345 to the coupling centerline at the output end of the reduction gearbox is 3627.6mm (the error is +/-0.5). It is important to note that the plane of the circular orifice plate facing the stern is the plane measured from which the center height is based, so this plane must be at the rib position of FR43+ 345.
And (3) positioning a point 8750mm away from the centerline plane, and drilling a foreign hole beside the measurement mark point of the hull baseline plane, wherein the distance L is the radius of the suspension wire plus the radius of the stay wire steel wire. When the plumb bob tip is aligned with the mark point, the stay wire steel wire is tightly attached to the plumb line. If the deviation exists, the position adjusting device on the wire pulling frame is adjusted, so that the steel wire in the center of the orifice plate is contacted with the vertical line, and the position of the bow reference point B is determined.
On a stern stay wire pulley frame arranged at FR-2 rib positions of a left side and a right side of a stern of a ship, a laser hole centering measuring device is placed, a laser point projection A point light target (FR21 rib position light target) projects a B target point light target, the position of the laser hole centering measuring device is adjusted according to computer output parameters, and then the laser hole centering measuring device is fixed.
After the laser hole centering measuring device is positioned, the steel wire stay wires on the port and starboard sides can be detached. Except that the propeller fixed guide pipe is installed by using a steel wire stay wire, the subsequent shafting component is assembled by using a laser hole to center a light spot emitted by a measuring device to a front light target and a rear light target installed in a component inner hole, an adjusting bolt seat is welded on the component, and the component is moved by using an adjusting bolt to perform centering, as shown in figure 4.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A laser measurement method for a ship shafting is characterized by comprising the following steps:
step 1, determining a theoretical central line of a shafting:
firstly, adopting a steel wire drawing method to find out bow and stern points of a theoretical center line of a shafting on a left side and a right side, and then utilizing laser to carry out final centering on the shafting;
step 2, measuring a shafting centerline stern target point A; respectively hanging plumb lines on the hull plates at the left side and the right side of the FR-1 rib position, wherein the distance L is equal to the radius of a hanging line and the radius of a stay wire, and tying a line section on the vertical line by taking the hull division base line as a reference, wherein the line section is set as a stern target point A;
step 3, determining a fore datum point B of a center line of a shafting:
drilling a foreign punching hole beside a measuring mark point on the base line surface of the ship body, wherein the distance L is equal to the radius of the suspension wire and the radius of the stay wire, and when the plumb bob tip is aligned with the mark point, the stay wire should be tightly attached to the suspension plumb line and is determined as the position of a bow reference point B;
a stern stay pulley frame is arranged at the FR-2 rib position of the stern of the ship, the weight of a steel wire hanger is 15kg, a bow stay frame is arranged at the FR44 rib position of the port and starboard, and a light target support is arranged at the stay point of FR6+250 rib positions;
on a stern stay wire pulley frame arranged at FR-2 rib positions of a left side and a right side of a stern of a ship, a laser hole centering measuring device is placed, a laser point projection A point light target (FR21 rib position light target) projects a B target point light target, and the position of the laser hole centering measuring device is adjusted according to computer output parameters and then is fixed;
after the laser hole centering measuring device is positioned, the steel wire stay wires on the port and starboard sides can be detached.
2. The shafting adjustment method according to claim 1, wherein said guy wire steel wire is a piano wire with a diameter of Φ 0.8 mm.
3. The shafting adjustment method according to claim 1, wherein the hanging points can be moved left and right and fixed, and a plumb line is required to be hung to be tightly attached to a guy wire, namely, a ship hull split base line.
4. The shafting adjustment method according to claim 1, wherein the wire pulling wire on the heavy pulley is hung on the wire pulling frame, the plumb line is tightly hung by moving the adjusting device left and right, and the light target is moved to enable the wire node of the positioning wheel to intersect with the light target point A, so as to set the initial positioning of the stern target point.
5. A method of shafting alignment as claimed in claim 1 wherein said shafting member assembly is centered by laser hole alignment measuring means for projecting a light spot to front and rear targets mounted in bores in the member, adjusting bolt seats are welded to the member, and the member is moved using the adjusting bolts for centering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911205399.6A CN111121670A (en) | 2019-11-29 | 2019-11-29 | Laser measurement method for ship shafting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911205399.6A CN111121670A (en) | 2019-11-29 | 2019-11-29 | Laser measurement method for ship shafting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111121670A true CN111121670A (en) | 2020-05-08 |
Family
ID=70496402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911205399.6A Pending CN111121670A (en) | 2019-11-29 | 2019-11-29 | Laser measurement method for ship shafting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111121670A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747696A (en) * | 2020-12-17 | 2021-05-04 | 武昌船舶重工集团有限公司 | Axial lighting system and hull structure reloading shafting center line determination method |
| CN114111569A (en) * | 2021-10-29 | 2022-03-01 | 沪东中华造船(集团)有限公司 | Method for correcting position of middle bearing of inclined shaft system |
| CN114408120A (en) * | 2022-01-21 | 2022-04-29 | 中船黄埔文冲船舶有限公司 | Flow guide pipe positioning and mounting method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0015654A1 (en) * | 1979-02-08 | 1980-09-17 | The Rank Organisation Limited | Method for positional setting of constructional components of a ship's propulsion unit |
| CN102815370A (en) * | 2012-09-04 | 2012-12-12 | 中船桂江造船有限公司 | One-step centering ship shafting mounting method |
| CN102914278A (en) * | 2012-10-16 | 2013-02-06 | 中国长江航运集团宜昌船厂 | Method of applying total station to irradiating alignment and positioning of ship axis |
| CN102944878A (en) * | 2012-11-13 | 2013-02-27 | 江苏科技大学 | Laser positioning detection system of automatic ship mooring system |
| CN105160988A (en) * | 2015-09-29 | 2015-12-16 | 大连经济技术开发区拉特激光技术开发有限公司 | Shafting alignment and piping layout training system |
| CN206241903U (en) * | 2016-12-09 | 2017-06-13 | 江苏省镇江船厂（集团）有限公司 | Marine shafting datum axis determines frock |
| CN108759725A (en) * | 2018-03-27 | 2018-11-06 | 广船国际有限公司 | A kind of underwater axis measurement method and measuring device |
| CN109556483A (en) * | 2018-12-29 | 2019-04-02 | 南通象屿海洋装备有限责任公司 | A kind of the die Zhao Zhong mechanism and alignment method of ship tail-pipe |
| CN109878634A (en) * | 2019-03-29 | 2019-06-14 | 浙江国际海运职业技术学院 | Marine shafting bracing wire technique |
-
2019
- 2019-11-29 CN CN201911205399.6A patent/CN111121670A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0015654A1 (en) * | 1979-02-08 | 1980-09-17 | The Rank Organisation Limited | Method for positional setting of constructional components of a ship's propulsion unit |
| CN102815370A (en) * | 2012-09-04 | 2012-12-12 | 中船桂江造船有限公司 | One-step centering ship shafting mounting method |
| CN102914278A (en) * | 2012-10-16 | 2013-02-06 | 中国长江航运集团宜昌船厂 | Method of applying total station to irradiating alignment and positioning of ship axis |
| CN102944878A (en) * | 2012-11-13 | 2013-02-27 | 江苏科技大学 | Laser positioning detection system of automatic ship mooring system |
| CN105160988A (en) * | 2015-09-29 | 2015-12-16 | 大连经济技术开发区拉特激光技术开发有限公司 | Shafting alignment and piping layout training system |
| CN206241903U (en) * | 2016-12-09 | 2017-06-13 | 江苏省镇江船厂（集团）有限公司 | Marine shafting datum axis determines frock |
| CN108759725A (en) * | 2018-03-27 | 2018-11-06 | 广船国际有限公司 | A kind of underwater axis measurement method and measuring device |
| CN109556483A (en) * | 2018-12-29 | 2019-04-02 | 南通象屿海洋装备有限责任公司 | A kind of the die Zhao Zhong mechanism and alignment method of ship tail-pipe |
| CN109878634A (en) * | 2019-03-29 | 2019-06-14 | 浙江国际海运职业技术学院 | Marine shafting bracing wire technique |
Non-Patent Citations (1)
| Title |
|---|
| 谭仁臣: "《船舶辅机与轴系》", 31 January 2017 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747696A (en) * | 2020-12-17 | 2021-05-04 | 武昌船舶重工集团有限公司 | Axial lighting system and hull structure reloading shafting center line determination method |
| CN114111569A (en) * | 2021-10-29 | 2022-03-01 | 沪东中华造船(集团)有限公司 | Method for correcting position of middle bearing of inclined shaft system |
| CN114408120A (en) * | 2022-01-21 | 2022-04-29 | 中船黄埔文冲船舶有限公司 | Flow guide pipe positioning and mounting method |
| CN114408120B (en) * | 2022-01-21 | 2023-08-29 | 中船黄埔文冲船舶有限公司 | Positioning and mounting method for honeycomb duct |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111121670A (en) | Laser measurement method for ship shafting | |
| JP6557749B2 (en) | Floating caisson model testing apparatus and multi-degree-of-freedom working method | |
| KR100830243B1 (en) | Final sighting | |
| KR200411896Y1 (en) | Jig for checking stern tube position | |
| WO2022011978A1 (en) | Boring and mounting technique for ship shaft and rudder systems | |
| CN101357674B (en) | Mounting method of steering column | |
| CN102336250B (en) | Method for installing rudder horn | |
| CN102745308B (en) | Method for carrying bulk freighter body stern part assembly | |
| CN104527922B (en) | Accurate positioning method of anchor bolt hole of marine main engine | |
| CN114043171B (en) | Manufacturing method of curve cable tower steel anchor box | |
| CN111071404A (en) | Ship shafting adjusting method | |
| CN113148058B (en) | Process for installing and positioning double rudder sleeve and tail casting in stage of sectional construction | |
| CN109591958B (en) | Method for accurately positioning track of ship tail shaft entering trolley | |
| CN113320659B (en) | Method for assembling flange and barrel of double-angle steering oar of ship | |
| CN112455623B (en) | Pipe laying operation system installation method of pipe laying ship | |
| CN111591409B (en) | Process method for improving forward reverse propelling precision of construction process | |
| US9582945B2 (en) | Rigging methods to calibrate control bodies of vehicles, and related systems | |
| CN103925864B (en) | Utilize ballast for cruising piping installs the method that positioning assisting tooling carries out installing location | |
| CN210392616U (en) | Large-diameter cylinder section butt joint device | |
| CN104443334B (en) | A kind of all-rotation device Accessory Members high accuracy installation method | |
| CN110171525B (en) | Method for pulling wire of nacelle | |
| CN104647254B (en) | Tailing axle bracket installation method | |
| CN114655384B (en) | Installation method of ship telescopic azimuth thruster | |
| KR20140124576A (en) | Method for measuring accuracy of steering block of ship | |
| CN114408120B (en) | Positioning and mounting method for honeycomb duct |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200508 |