CN108724139B - Marking device and method for steel pipe bent pipe - Google Patents
Marking device and method for steel pipe bent pipe Download PDFInfo
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- CN108724139B CN108724139B CN201810640301.9A CN201810640301A CN108724139B CN 108724139 B CN108724139 B CN 108724139B CN 201810640301 A CN201810640301 A CN 201810640301A CN 108724139 B CN108724139 B CN 108724139B
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- ruler
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- shaped groove
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H7/00—Marking-out or setting-out work
- B25H7/04—Devices, e.g. scribers, for marking
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- Mechanical Engineering (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
A marking device and method for steel pipe bend pipe, including two positioning seat assemblies and marking ruler; the positioning seat assembly comprises a base cushion block, a limiting plate, a T-shaped block and a fastening bolt, wherein the base cushion block is provided with a V-shaped groove for placing a steel pipe and a T-shaped groove in the vertical direction, the limiting plate is connected with the T-shaped block and is installed in the T-shaped groove and can move up and down along the T-shaped groove, the marking ruler comprises a fastening nut, a left ruler and a right ruler, the left end of the right ruler is connected with the right end of the left ruler, the fastening nut fixes the angle position formed by the left ruler and the right ruler, and the ruler edge of the marking ruler is provided with length scales for measuring the marking distance; during marking operation, the steel pipe bent pipe is horizontally arranged in the V-shaped grooves of the two base cushion blocks, the limiting plate moves along the T-shaped groove until the limiting plate is contacted with the steel pipe bent pipe and fixed, the marking ruler is abutted against the limiting plate, the fastening nut is screwed, the scale on the marking ruler is read, and the blanking size is marked by marking. The invention has the advantages of simple structure, convenient use, high reliability, wide application range and the like.
Description
Technical Field
The invention relates to manufacturing of a marine low-speed diesel engine, in particular to a marking device and method for a steel pipe elbow, and belongs to the technical field of diesel engine manufacturing.
Background
In the manufacture of marine low-speed diesel engine pipe fittings, a plurality of pipes of each piping system need to be bent, such as lubricating oil system piping, cooling water system piping, fuel system piping, air system piping and the like. In the process of bending various steel pipes, because the pipe needs to be clamped by the clamping die when the pipe bender bends the steel pipes, and the clamping die has the limit of the shortest length, when the length of some steel pipes is shorter than the length of the clamping die, the blank before bending needs to be left with a length margin, and after the steel pipes are bent, the excess length is cut according to the design size to remove.
At present, the method adopted for scribing and blanking the bent steel pipe of the marine diesel engine is that an operator flatly places the bent steel pipe on an operation table, uses a scribing pen to horizontally scribe the upper surface of the bent steel pipe, then uses two steel rulers to find an intersection point along an extension line of a straight line drawn on the steel pipe, marks and scribes on the steel pipe according to the length required by a drawing, and then cuts and blanks.
The currently used steel pipe elbow marking method has some disadvantages. In the process of elbow marking off, the operator is required to have higher professional operating skill, and the operation process is time-consuming and labor-consuming, at first the level is placed to the steel pipe return bend of needs, then utilize marking off pen to carry out the level marking off at the upper surface of steel pipe return bend, lean on along the straight line of drawing and put a steel ruler again, and need to guarantee that this steel ruler does not take place the displacement and remove, then extend along the straight line with another steel ruler on another section of steel pipe return bend and make two steel rulers intersect, the reading marking off again, the level will be put all the time in the whole process of putting the ruler. The manual operation procedures have more steps and complicated process, the measurement length is easy to generate errors, and the measurement precision cannot be guaranteed.
Disclosure of Invention
The invention provides a marking device and method for a steel pipe elbow, aiming at solving the problems of complicated marking and blanking operation, low precision, low working efficiency and the like of an operator in the existing steel pipe elbow marking process, and achieving the effects of improving marking reliability, improving marking precision, reducing operation difficulty and improving working efficiency. The marking of the steel pipe elbow in the scheme is specially pointed out
Based on the above purpose, the technical scheme provided by the invention is as follows:
a marking device for a steel pipe elbow is used for marking and blanking the elbow of a marine low-speed diesel engine and is characterized by comprising two positioning seat assemblies and a marking ruler;
the positioning seat assembly can move and comprises a base cushion block, a limiting plate, a T-shaped block and a fastening bolt, wherein a V-shaped groove with an upward opening for placing a steel pipe is formed in the lower portion of the base cushion block, a T-shaped groove facing the V-shaped groove and along the vertical direction is formed in the inner side wall surface of the base cushion block, the limiting plate is connected with the T-shaped block and is installed in the T-shaped groove together, the limiting plate is located above the V-shaped groove, and the limiting plate and the T-shaped block can move up and down along the T-shaped groove and press the steel pipe located in the V-shaped groove;
the scribing ruler comprises a fastening nut, a left ruler and a right ruler, a round hole is formed in the right end of the left ruler, a threaded cylinder perpendicular to the ruler surface is arranged at the left end of the right ruler, the round hole is sleeved into the threaded cylinder to connect the left ruler with the right ruler, the fastening nut is screwed into the threaded cylinder to fix the angle positions of the left ruler and the right ruler, and length scales used for measuring scribing distances are arranged on the edges of the left ruler and the right ruler.
As a further improvement, the positions of the round hole and the threaded cylinder are positioned at the intersection point of the extension lines of the ruler edge with the length scales of the left ruler and the ruler edge with the length scales of the right ruler.
As a further improvement, the left ruler and the right ruler can rotate around the threaded cylinder to adjust an included angle between the left ruler and the right ruler; the included angle can be fixed by screwing the fastening nut.
As a further improvement, the T-shaped block is provided with a threaded hole, the limiting plate is provided with a through hole, the fastening bolt penetrates through the through hole and is screwed into the threaded hole of the T-shaped block, and the position of the limiting plate is adjusted and fixed through the fastening bolt.
As a further improvement, the longitudinal direction of the V-shaped groove is spatially vertical to the longitudinal direction of the T-shaped groove.
As a further improvement, the angle formed by the two surfaces of the V-shaped groove is 120 degrees, and the position of the V-shaped groove is symmetrical about a vertical plane.
As a further improvement, the limiting plate is provided with a protruding part for positioning, and the protruding part is embedded into the T-shaped groove.
As a further improvement, the front part of the limit plate is provided with a positioning surface for positioning the marking ruler, and the distance from the positioning surface to the rear side surface is equal to the distance from the lowest point of the V-shaped groove of the base cushion block to the inner side wall surface.
As a further improvement, the thickness of the joint of the left ruler and the right ruler is half of the thickness of the ruler bodies of the left ruler and the right ruler.
The other technical scheme of the invention is as follows:
a marking method for a steel pipe bent pipe realized by the marking device comprises the following specific steps:
1) respectively placing two ends of a steel pipe bent pipe in V-shaped grooves of two base cushion blocks, and adjusting the positions of the two base cushion blocks to enable the steel pipe bent pipe to be in a horizontal state, wherein the center of the steel pipe bent pipe is naturally positioned on a vertical symmetrical surface of the V-shaped grooves;
2) loosening the fastening bolts to adjust the position of the limiting plate, enabling the limiting plate to move along the T-shaped groove until the limiting plate contacts the upper edge of the steel pipe bent pipe, and screwing the fastening bolts to fix the limiting plate;
3) and tightly abutting the left ruler and the right ruler of the marking ruler on the positioning surfaces of the front part of the limiting plate, screwing the fastening screw cap, reading the scales on the marking ruler, marking the blanking size, and finishing the marking operation of the steel pipe bent pipe.
The working principle of the invention is as follows:
when the steel pipe bent pipe is stably placed on the two base cushion block V-shaped grooves, the center of the steel pipe bent pipe is naturally positioned on a vertical symmetrical surface of the V-shaped grooves, the vertical height of the limiting plate is adjusted, so that the limiting plate is in contact with the pipe, and the distance from the positioning surface to the rear side surface on the limiting plate is equal to the distance from the lowest point of the base cushion block V-shaped groove to the inner side wall surface, so that the contact position and the center line of the steel pipe bent pipe are on the same vertical plane; and the side with scales on the marking ruler is abutted against the positioning surfaces of the two limiting plates, the intersection point of the left straight ruler and the right straight ruler on the marking ruler is the intersection point of the central lines of the two straight pipes on the elbow, the length from the intersection point to the position needing to be cut can be read out only according to the scales on the marking ruler, the distance position is marked, the elbow marking operation is completed, and then cutting and blanking are carried out according to the marking marks.
Compared with the prior elbow marking operation mode, the method has the following advantages:
1. the scribing precision is high. The center line of the surface of the pipe is scribed by utilizing the characteristic that the distance from the positioning surface to the rear side surface of the limiting plate is the same as the distance from the center of the pipe to the inner side wall surface of the base cushion block, so that the scribing precision is higher than that of the prior art; the intersection point of the marking ruler is utilized, so that the position of the intersection point is more accurate than the position of the intersection point found by utilizing two steel rulers along the extension line of a straight line drawn on a steel pipe at present, and the blanking precision is higher.
2. The application range is wide. The scribing device can adapt to the diameter of
The marking of the elbow basically covers all elbows of the marine low-speed diesel engine in the application range.
3. The operation is convenient. The streaking apparatus requires less operator skill.
4. The working efficiency is high. The invention reduces the complicated procedures of the operator and effectively improves the working efficiency of the operator.
Drawings
FIG. 1 is a schematic of the present invention.
Fig. 2 is a schematic view of a base block.
Fig. 3 is a schematic view of a stopper plate.
Fig. 4 is a schematic diagram of a T-block.
Figure 5 is a schematic view of a fastening nut.
Figure 6 is a schematic view of the left ruler.
Figure 7 is a schematic view of the right straightedge.
Fig. 8 is a schematic view of a fastening bolt.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples. All equivalent changes and modifications made according to the contents of the present specification should fall within the scope of the claims of the present application.
Referring to fig. 1, fig. 1 shows a marking and blanking operation of a steel pipe elbow marking device for a marine low-speed diesel engine elbow, which can be used for marking and blanking a steel pipe elbow with a diameter of
Bending the steel pipe; the scribing device comprises two positioning seat assemblies and a scribing ruler.
The locating seat assembly can move and comprises a base cushion block 1, a limiting plate 2, a T-shaped block 3 and a fastening bolt 6.
Referring to fig. 2, a V-shaped groove 11 for placing a steel pipe is formed in the lower portion of the base cushion block 1, an opening of the V-shaped groove 11 faces upward, an angle formed by two surfaces of the V-shaped groove 11 is 120 °, and the positions of the two surfaces are symmetrical with respect to a vertical plane. The inner side wall surface 14 of the base cushion block 1 is provided with a T-shaped groove 12 along the vertical direction, the T-shaped groove 12 faces the V-shaped groove 11, and the longitudinal direction of the V-shaped groove 11 is vertical to the longitudinal direction of the T-shaped groove 12 in a space mode.
The limiting plate 2 and the T-shaped block 3 are connected together through the fastening bolt 6 and are arranged in the T-shaped groove 12. The limiting plate 2 is positioned above the V-shaped groove 11, and the limiting plate 2 and the T-shaped block 3 can move up and down along the T-shaped groove 12 and press the steel pipe positioned in the V-shaped groove 11.
Referring to fig. 3, a through hole 22 is formed in the limiting plate 2, referring to fig. 4, a threaded hole 31 is formed in the T-shaped block 3, and the fastening bolt 6 (see fig. 5) penetrates through the through hole 22 and is screwed into the threaded hole 31 of the T-shaped block 3; the vertical position of the limiting plate 2 can be adjusted and fixed by the fastening bolt 6. The rear side 23 of the limiting plate 2 is provided with a boss 21 for positioning, and the boss 21 is embedded into the T-shaped groove 12 of the base cushion block 1. The front part of the limiting plate 2 is provided with a positioning surface 24 for positioning the marking ruler, and the distance from the positioning surface 24 to the rear side surface 23 is equal to the distance from the lowest point of the V-shaped groove 11 of the base cushion block 1 to the inner side wall surface 14.
Referring to fig. 1, the scribing ruler comprises a fastening nut 7, a left ruler 4 and a right ruler 5.
Referring to fig. 6, a circular hole 41 is formed in the right end of the left ruler 4, referring to fig. 7, a threaded cylinder 51 perpendicular to the ruler surface is formed in the left end of the right ruler 5, the circular hole 41 is sleeved into the threaded cylinder 51 to connect the left ruler 4 and the right ruler 5, and the left ruler 4 and the right ruler 5 can rotate around the threaded cylinder 51 to adjust an included angle between the left ruler 4 and the right ruler 5; the thickness of the lap joint of the left ruler 4 and the right ruler 5 is half of the thickness of the ruler bodies of the left ruler 4 and the right ruler 5. The fastening nut 7 (see fig. 8) is screwed into the thread cylinder 51 to fix the angle position of the included angle formed by the left ruler 4 and the right ruler 5, the length scales 42 and 52 used for measuring the scribing distance are respectively arranged on the ruler edges of the left ruler 4 and the right ruler 5, and the positions of the round hole 41 and the thread cylinder 51 are positioned at the intersection point of the ruler edge of the left ruler 4 with the length scales 42 and the ruler edge of the right ruler 5 with the length scales 52.
The marking method for the bent steel pipe by the marking device comprises the following specific steps (see figure 1):
1) two ends of the steel pipe bent pipe are respectively arranged in the V-shaped grooves 11 of the two base cushion blocks 1, the positions of the two base cushion blocks 1 are adjusted, the steel pipe bent pipe is in a horizontal state, and the center of the steel pipe bent pipe is naturally positioned on a vertical symmetrical plane of the V-shaped grooves 11.
2) And loosening the fastening bolts 6 to adjust the position of the limiting plate 2, enabling the limiting plate 2 to move along the T-shaped groove 12 until the limiting plate 2 contacts the upper edge of the steel pipe bent pipe, and screwing the fastening bolts 6 to fix the limiting plate 2.
3) And (3) abutting the left ruler 4 and the right ruler 5 of the marking ruler against the positioning surface 24 at the front part of the limiting plate 2, screwing the fastening nut 7, reading the scale on the marking ruler, marking the blanking size, and finishing the marking operation of the bent steel pipe.
The scope of the invention is not limited to the embodiments described above, but also encompasses other variants and alternatives which are obvious for the invention.
Claims (8)
1. A marking device for a steel pipe elbow is used for marking and blanking the elbow of a marine low-speed diesel engine and is characterized by comprising two positioning seat assemblies and a marking ruler;
the positioning seat assembly can move and comprises a base cushion block, a limiting plate, a T-shaped block and a fastening bolt, wherein a V-shaped groove with an upward opening for placing a steel pipe is formed in the lower portion of the base cushion block, a T-shaped groove facing the V-shaped groove and along the vertical direction is formed in the inner side wall surface of the base cushion block, the limiting plate is connected with the T-shaped block and is installed in the T-shaped groove together, the limiting plate is located above the V-shaped groove, and the limiting plate and the T-shaped block can move up and down along the T-shaped groove and press the steel pipe located in the V-shaped groove;
the scribing ruler comprises a fastening nut, a left ruler and a right ruler, wherein a round hole is formed in the right end of the left ruler, a threaded cylinder perpendicular to the ruler surface is arranged at the left end of the right ruler, the round hole is sleeved in the threaded cylinder to connect the left ruler with the right ruler, the fastening nut is screwed into the threaded cylinder to fix the angle position formed by the left ruler and the right ruler, and length scales used for measuring the scribing distance are arranged on the edges of the left ruler and the right ruler;
the rear side face of the limiting plate is provided with a protruding portion used for positioning, the protruding portion is embedded into the T-shaped groove, the front portion of the limiting plate is provided with a positioning face used for positioning the marking ruler, and the distance from the positioning face to the rear side face is equal to the distance from the lowest point of the base cushion block V-shaped groove to the inner side wall face.
2. The line drawing device for the steel pipe elbow as claimed in claim 1, wherein the position of the circular hole and the threaded cylinder is at the intersection point of the extension line of the length scale of the left ruler and the length scale of the right ruler.
3. The line marking device for the steel pipe elbow as claimed in claim 1, wherein the left ruler and the right ruler can rotate around the threaded cylinder to adjust an included angle between the left ruler and the right ruler; the included angle can be fixed by screwing the fastening nut.
4. The scribing apparatus for a steel pipe bend according to claim 1, wherein the T-shaped block has a threaded hole, the position-limiting plate has a through hole, and the fastening bolt is screwed into the threaded hole of the T-shaped block through the through hole, and the position of the position-limiting plate is adjusted and fixed by the fastening bolt.
5. The line drawing device for bent steel pipes according to claim 1, wherein the longitudinal direction of the V-shaped groove is spatially perpendicular to the longitudinal direction of the T-shaped groove.
6. The scribing apparatus for a steel pipe elbow according to claim 1, wherein the two surfaces of the V-shaped groove form an angle of 120 ° and are positioned symmetrically with respect to a vertical plane.
7. The line marking device for the steel pipe elbow as claimed in claim 1, wherein the thickness of the joint of the left ruler and the right ruler is half of the thickness of the ruler body of the left ruler and the right ruler.
8. A marking method for a steel pipe elbow pipe, which is realized by the marking device of claim 1, is characterized by comprising the following specific steps:
1) respectively placing two ends of a steel pipe bent pipe in V-shaped grooves of two base cushion blocks, and adjusting the positions of the two base cushion blocks to enable the steel pipe bent pipe to be in a horizontal state, wherein the center of the steel pipe bent pipe is naturally positioned on a vertical symmetrical surface of the V-shaped grooves;
2) loosening the fastening bolts to adjust the position of the limiting plate, enabling the limiting plate to move along the T-shaped groove until the limiting plate contacts the upper edge of the steel pipe bent pipe, and screwing the fastening bolts to fix the limiting plate;
3) and tightly abutting the left ruler and the right ruler of the marking ruler on the positioning surfaces of the front part of the limiting plate, screwing the fastening screw cap, reading the scales on the marking ruler, marking the blanking size, and finishing the marking operation of the steel pipe bent pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810640301.9A CN108724139B (en) | 2018-06-21 | 2018-06-21 | Marking device and method for steel pipe bent pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810640301.9A CN108724139B (en) | 2018-06-21 | 2018-06-21 | Marking device and method for steel pipe bent pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108724139A CN108724139A (en) | 2018-11-02 |
| CN108724139B true CN108724139B (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810640301.9A Active CN108724139B (en) | 2018-06-21 | 2018-06-21 | Marking device and method for steel pipe bent pipe |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807851A (en) * | 2019-03-20 | 2019-05-28 | 海洋石油工程（青岛）有限公司 | Pipeline quickly looks for the tool and method of point location |
| CN110524450B (en) * | 2019-07-26 | 2021-06-01 | 中国航空工业集团公司济南特种结构研究所 | Reposition of redundant personnel strip location frock |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100791541B1 (en) * | 2006-10-31 | 2008-01-03 | 한국전력공사 | Apparatus for drawing check on pipe |
| CN201313305Y (en) * | 2008-11-21 | 2009-09-23 | 鞍山钢铁集团公司 | Fast scribing tool of elbow of steel pipe |
| CN103448050A (en) * | 2013-08-21 | 2013-12-18 | 苏州市合昌电器有限公司 | Marking assisting device |
| CN205271986U (en) * | 2015-12-22 | 2016-06-01 | 郑州万达重工股份有限公司 | Large -scale return bend scribed circle ruler |
| CN206140482U (en) * | 2016-10-19 | 2017-05-03 | 上海中船三井造船柴油机有限公司 | A marking tool for steel pipe return bend |
-
2018
- 2018-06-21 CN CN201810640301.9A patent/CN108724139B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100791541B1 (en) * | 2006-10-31 | 2008-01-03 | 한국전력공사 | Apparatus for drawing check on pipe |
| CN201313305Y (en) * | 2008-11-21 | 2009-09-23 | 鞍山钢铁集团公司 | Fast scribing tool of elbow of steel pipe |
| CN103448050A (en) * | 2013-08-21 | 2013-12-18 | 苏州市合昌电器有限公司 | Marking assisting device |
| CN205271986U (en) * | 2015-12-22 | 2016-06-01 | 郑州万达重工股份有限公司 | Large -scale return bend scribed circle ruler |
| CN206140482U (en) * | 2016-10-19 | 2017-05-03 | 上海中船三井造船柴油机有限公司 | A marking tool for steel pipe return bend |
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| CN108724139A (en) | 2018-11-02 |
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