CN110883503B - Special tool for grinding and matching diffuser pipe of scavenging box of marine diesel engine and manufacturing method - Google Patents
Special tool for grinding and matching diffuser pipe of scavenging box of marine diesel engine and manufacturing method Download PDFInfo
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- CN110883503B CN110883503B CN201811054470.0A CN201811054470A CN110883503B CN 110883503 B CN110883503 B CN 110883503B CN 201811054470 A CN201811054470 A CN 201811054470A CN 110883503 B CN110883503 B CN 110883503B
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses a special tool for grinding and matching a diffuser pipe of a scavenging box of a marine diesel engine and a manufacturing method, wherein the tool comprises a structural part, an inclined flange and a cylindrical part, the structural part is provided with a rib plate structure, the inclined flange is provided with an aligning rib structure, and the manufacturing method comprises blank manufacturing, machining, welding, milling and aligning ribs, heat treatment and spraying of the tool; compared with the prior art, the invention has the advantages that: the tool is safe and reliable, and the cost is low; after processing, the diffuser pipe is directly researched and assembled by using a tool, so that a large amount of manpower and material resources are saved; the problem of actual assembly site cross operation is solved, site fire is avoided, and the control effect on the external quality of the host is achieved.
Description
Technical Field
The invention relates to a special tool and a manufacturing method, in particular to a special tool and a manufacturing method for researching and matching a diffuser pipe of a scavenging box of a marine diesel engine.
Background
The scavenging box, the diffuser pipe and the supercharger are key circulating exhaust parts of the low-speed diesel engine, the scavenging box is an assembly foundation, the diffuser pipe is a cylindrical part and is connected with an inclined flange of the scavenging box, the supercharger is positioned on the datum plane of the scavenging box, and the flange of the supercharger is connected with the flange of the diffuser pipe, so that a set of complete exhaust system installation mode before assembly is formed.
The technical requirements of the low-speed diesel engine in the prior art are assembly field development, namely, a supercharger is lifted by a crane in the assembly process, upper and lower flanges of a diffuser pipe are developed, and position spot welding is determined. The time and labor are wasted under the field cross operation, and potential safety hazards exist in the field fire.
Disclosure of Invention
In order to effectively solve the technical problems, the invention provides a manufacturing method of a special tool for researching and matching a diffuser pipe of a scavenging box of a marine diesel engine, which is characterized by comprising the following steps of:
the method comprises the following steps: processing a structural part blank, and welding a plate rib;
step two: machining the structural member blank, the tubular member and the inclined flange;
step three: welding the structural part, the tubular part, the inclined flange and the alignment rib to form a tool;
step four: milling an alignment rib;
step five: and (4) carrying out heat treatment and spraying on the tool.
According to the manufacturing method of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine, the preferable method is as follows: in the second step, machining the inclined flange by adopting a special numerical control gantry milling machine to mill an inclined flange surface finished product, wherein the roughness of the inclined flange surface is Ra3.2; and drilling a hole in the flange face.
According to the manufacturing method of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine, the preferable method is as follows: in the fifth step, an annealing process is adopted for the heat treatment of the structural member blank, and the annealing process comprises the following steps: heating, heat preservation and cooling: firstly, feeding a tool into a furnace at 50 ℃, heating to 600 ℃ at a heating speed of 100 ℃/h, and then preserving heat for 3 hours; finally, the temperature is reduced by 50 ℃/h.
The special tool manufactured according to the manufacturing method of the special tool for researching and matching the diffuser pipe of the marine diesel engine scavenging air box comprises the following steps: structure, oblique flange, tube-shape spare, wherein: the structure is welded with one end of the tubular part, the inclined flange is welded with the other end of the tubular part, an inclined hole structure is arranged on the inclined flange, a rib plate structure is arranged on the structure, an alignment rib structure is further arranged on the inclined flange, and the alignment rib structure is welded on the axis of the inclined flange.
According to above marine diesel engine sweep gas case diffuser pipe bedding in special frock is joined in marriage, preferred: the structural part is provided with a lifting lug.
According to above marine diesel engine sweep gas case diffuser pipe bedding in special frock is joined in marriage, preferred: the rib plate structures are horizontally and vertically distributed on the structural member, and the number of the rib plate structures is 6-10.
According to above marine diesel engine sweep gas case diffuser pipe bedding in special frock is joined in marriage, preferred: one side surface of the alignment rib structure on the inclined flange is 3-8mm lower than the same side surface of the inclined flange.
According to above marine diesel engine sweep gas case diffuser pipe bedding in special frock is joined in marriage, preferred: the diameter of the inclined hole structure is 18mm-25mm, and the internal roughness of the inclined hole structure is as follows: and Ra6.3.
According to above marine diesel engine sweep gas case diffuser pipe bedding in special frock is joined in marriage, preferred: the material of the structural member is Q235B plate.
According to above marine diesel engine sweep gas case diffuser pipe bedding in special frock is joined in marriage, preferred: the oblique flange is a 15-degree flange.
Compared with the prior art, the invention has the advantages that: the special tool and the manufacturing method for researching and matching the diffuser pipe flange by using the tool to simulate the supercharger and moving forwards in the research and matching process are provided, and the method for researching and matching the diffuser pipe flange by connecting the supercharger and the diffuser pipe through a crane in the assembling process is avoided. On the premise of ensuring the quality and the safety, the production efficiency is greatly improved, and the production cost is saved.
Drawings
FIG. 1 is a flow chart of a manufacturing method of a special tool for researching and matching a diffuser pipe of a scavenging box of a marine diesel engine.
FIG. 2 is a structural diagram of a special tool for researching and matching a diffuser pipe of a scavenging box of a marine diesel engine.
FIG. 3 is a front view of a special tool for researching and matching a diffuser pipe of a scavenging box of a marine diesel engine.
FIG. 4 is a sectional view in the A-A direction of a front view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 5 is a top view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 6 is a C-C cross sectional view of a top view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 7 is a partially enlarged view in the direction B of a cross section in the direction C-C of a top view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 8 is a schematic view of a special tool for bedding and preparing a diffuser pipe of a scavenging box of a marine diesel engine, which is connected with the scavenging box and then used for bedding and preparing a diffuser pipe flange.
Detailed Description
Preferred embodiment 1
FIG. 1 is a flow chart of a manufacturing method of a special tool for researching and matching a diffuser pipe of a scavenging box of a marine diesel engine.
FIG. 2 is a structural diagram of a special tool for researching and matching a diffuser pipe of a scavenging box of a marine diesel engine.
FIG. 3 is a front view of a special tool for researching and matching a diffuser pipe of a scavenging box of a marine diesel engine.
FIG. 4 is a sectional view in the A-A direction of a front view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 5 is a top view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 6 is a C-C cross sectional view of a top view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 7 is a partially enlarged view in the direction B of a cross section in the direction C-C of a top view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 8 is a schematic view of a special tool for bedding and preparing a diffuser pipe of a scavenging box of a marine diesel engine, which is connected with the scavenging box and then used for bedding and preparing a diffuser pipe flange.
The manufacturing method of the special tool for researching and matching the diffuser pipe of the marine diesel engine scavenging box is characterized by comprising the following steps of:
the method comprises the following steps: processing a structural part blank, and welding a plate rib;
step two: machining the structural member blank, the tubular member and the inclined flange;
step three: welding the structural part, the tubular part, the inclined flange and the alignment rib to form a tool;
step four: milling an alignment rib;
step five: and (4) carrying out heat treatment and spraying on the tool.
In the second step of this embodiment, the machining of the oblique flange is performed by using a special numerical control gantry milling machine to mill the finished product of the oblique flange surface, and the roughness of the oblique flange surface is ra 3.2; and drilling a hole in the flange face.
In the fifth step of this embodiment, an annealing process is adopted for the heat treatment of the structural member blank, and the annealing process includes: heating, heat preservation and cooling: firstly, feeding a tool into a furnace at 50 ℃, heating to 600 ℃ at a heating speed of 100 ℃/h, and then preserving heat for 3 hours; finally, the temperature is reduced by 50 ℃/h.
The special tool for researching and matching the diffuser pipe of the marine diesel engine scavenging air box is characterized in that a structural member 100 is welded with one end of a cylindrical member 300, an inclined flange 200 is welded with the other end of the cylindrical member 300, an inclined hole structure 201 is arranged on the inclined flange 200, a rib plate structure 101 is arranged on the structural member 100, an aligning rib structure 210 is further arranged on the inclined flange 200, and the aligning rib structure 210 is welded on the central axis of the inclined flange 200.
The structural member 100 of the present embodiment is provided with a lifting lug 102. The lifting lug 102 is designed on the top of the main body, and the force calculation is qualified. The lifting lug is welded at the top of the tool, so that the tool is convenient to lift. The manual adjustment and positioning are accurate, economic and practical, and the equipment has reliable safety.
The special tool for researching and matching the diffuser pipe of the marine diesel engine scavenging box simulates the actual size of a supercharger, and comprises a 15-degree inclined flange surface and an upper circumferential hole, and is divided into a main body and accessories. The main body is a tool structure 100 welded by Q235B, rib plate structures 101 are arranged on the tool structure 100, the rib plate structures 101 are horizontally and vertically distributed on the tool structure 100, and 6-10 rib plate structures 101 are arranged.
The inclined flanges are processed and formed according to a numerical control milling machine, and the circumferential holes are uniformly distributed. The accessories comprise positioning M20 bolts and nuts, and the number of the positioning M20 bolts and nuts is determined according to the joint face holes of the scavenging air box and the supercharger. The manufacture of the tool needs to be carried out by the working procedures of blank welding, heat treatment, machining and research and preparation. The structural member 100 is connected to one end of the cylindrical member 300 by welding, and the inclined flange 200 is connected to the other end of the cylindrical member 300 by welding.
The diameter of the inclined hole structure 201 of the embodiment is 18mm-25mm, and the internal roughness of the inclined hole structure 201 is as follows: and Ra6.3. The diameter of the hole structure is consistent with that of the hole of the scavenging box, and the hole has no obvious burr.
The structural member 100 of the present embodiment is a Q235B board.
The beveled flange 200 of this embodiment is a 15 ° flange.
The method for pre-bedding the diffuser flange by adopting the special tool for bedding and bedding the diffuser of the marine diesel engine scavenging box comprises the following steps: firstly, mounting a tooling structural member 100 on a positioning surface of a scavenging air box 600 through a positioning bolt; then, taking the position as a reference, adjusting the position of the flange 800 to be prepared of the diffuser pipe 500, and performing spot welding; and finally, dismantling the diffuser pipe 500 to a welding finished product in the previous process, and wrapping the diffuser pipe with insulation.
After the tool is used up, the tool is preferably stored in a brushing oil mode and is used by a host computer after being placed off a platform, and management is convenient.
The cable support of the scavenging box needs to be considered in advance and cannot interfere with the tool.
Preferred embodiment 2
FIG. 1 is a flow chart of a manufacturing method of a special tool for researching and matching a diffuser pipe of a scavenging box of a marine diesel engine.
FIG. 2 is a structural diagram of a special tool for researching and matching a diffuser pipe of a scavenging box of a marine diesel engine.
FIG. 3 is a front view of a special tool for researching and matching a diffuser pipe of a scavenging box of a marine diesel engine.
FIG. 4 is a sectional view in the A-A direction of a front view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 5 is a top view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 6 is a C-C cross sectional view of a top view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 7 is a partially enlarged view in the direction B of a cross section in the direction C-C of a top view of the special tool for researching and matching the diffuser pipe of the scavenging box of the marine diesel engine.
FIG. 8 is a schematic view of a special tool for bedding and preparing a diffuser pipe of a scavenging box of a marine diesel engine, which is connected with the scavenging box and then used for bedding and preparing a diffuser pipe flange.
The manufacturing method of the special tool for researching and matching the diffuser pipe of the marine diesel engine scavenging box is characterized by comprising the following steps of:
the method comprises the following steps: processing a structural part blank, and welding a plate rib;
step two: machining the structural member blank, the tubular member and the inclined flange;
step three: welding the structural part, the tubular part, the inclined flange and the alignment rib to form a tool;
step four: milling an alignment rib;
step five: and (4) carrying out heat treatment and spraying on the tool.
In the second step of this embodiment, the machining of the oblique flange is performed by using a special numerical control gantry milling machine to mill the finished product of the oblique flange surface, and the roughness of the oblique flange surface is ra 3.2; and drilling a hole in the flange face.
In the fifth step of this embodiment, an annealing process is adopted for the heat treatment of the structural member blank, and the annealing process includes: heating, heat preservation and cooling: firstly, feeding a tool into a furnace at 50 ℃, heating to 600 ℃ at a heating speed of 100 ℃/h, and then preserving heat for 3 hours; finally, the temperature is reduced by 50 ℃/h.
The special tool for researching and matching the diffuser pipe of the marine diesel engine scavenging air box is characterized in that a structural part 100 is welded with one end of a cylindrical part 300, an inclined flange 200 is welded with the other end of the cylindrical part 300, an inclined hole structure 201 is arranged on the inclined flange 200, a rib plate structure 101 is arranged on the structural part 100, an alignment rib structure 210 is further arranged on the inclined flange 200, and the alignment rib structure 210 is welded on the axis line of the inclined flange 200.
The structural member 100 of the present embodiment is provided with a lifting lug 102. The lifting lug 102 is designed on the top of the main body, and the force calculation is qualified. The lifting lug is welded at the top of the tool, so that the tool is convenient to lift. The manual adjustment and positioning are accurate, economic and practical, and the equipment has reliable safety.
The special tool for researching and matching the diffuser pipe of the marine diesel engine scavenging box simulates the actual size of a supercharger, and comprises a 15-degree inclined flange surface and an upper circumferential hole, and is divided into a main body and accessories. The main part is the frock structure 100 of Q235B welding, has gusset structure 101 on the frock structure 100, and gusset structure 101 level and vertical distribution have 6 on structure 100, gusset structure (101).
The inclined flanges are processed and formed according to a numerical control milling machine, and the circumferential holes are uniformly distributed. The accessories comprise positioning M20 bolts and nuts, and the number of the positioning M20 bolts and nuts is determined according to the joint face holes of the scavenging air box and the supercharger. The manufacture of the tool needs to be carried out by the working procedures of blank welding, heat treatment, machining and research and preparation. The structural member 100 is connected to one end of the cylindrical member 300 by welding, and the inclined flange 200 is connected to the other end of the cylindrical member 300 by welding.
The diameter of the inclined hole structure 201 of the embodiment is 20mm-22mm, and the internal roughness of the inclined hole structure 201 is as follows: and Ra6.3. The diameter of the hole structure is consistent with that of the hole of the scavenging box, and the hole has no obvious burr.
The structural member 100 of the present embodiment is a Q235B board.
The beveled flange 200 of this embodiment is a 15 ° flange.
The method for pre-bedding the diffuser flange by adopting the special tool for bedding and bedding the diffuser of the marine diesel engine scavenging box comprises the following steps: firstly, mounting a tooling structural member 100 on a positioning surface of a scavenging air box 600 through a positioning bolt; then, taking the position as a reference, adjusting the position of the flange 800 to be prepared of the diffuser pipe 500, and performing spot welding; and finally, dismantling the diffuser pipe 500 to a welding finished product in the previous process, and wrapping the diffuser pipe with insulation.
After the tool is used up, the tool is preferably stored in a brushing oil mode and is used by a host computer after being placed off a platform, and management is convenient.
The cable support of the scavenging box needs to be considered in advance and cannot interfere with the tool.
After processing, the diffuser pipe flange is directly researched and assembled by using a tool, so that a large amount of manpower and material resources are saved; the problem of actual assembly site cross operation is solved, site fire is avoided, and the control effect on the external quality of the host is achieved.
Claims (3)
1. The manufacturing method of the special tool for researching and matching the diffuser pipe of the marine diesel engine scavenging box is characterized by comprising the following steps of: a structural member (100), an inclined flange (200), tube-shape spare (300), the one end welding of structure (100) and tube-shape spare (300), oblique flange (200) and the other end welding of tube-shape spare (300), be provided with inclined hole structure (201) on oblique flange (200), be provided with gusset structure (101) on structure (100), still be provided with alignment muscle structure (210) on oblique flange (200), alignment muscle structure (210) welding is on oblique flange (200) axis, be provided with lug (102) on structure (100), gusset structure (101) level and vertical distribution are on structure (100), gusset structure (101) have 6-10, the side surface of alignment muscle structure (210) on oblique flange (200) is less than inclined flange (200) homonymy surface 3mm-8mm, the diameter of inclined hole structure (201) is 18mm-25mm, the inside roughness of inclined hole structure (201): ra6.3, the structural member (100) is made of a Q235B plate, and the inclined flange (200) is a 15-degree flange;
the manufacturing method comprises the following steps:
the method comprises the following steps: manufacturing a blank, processing the structural part blank, and welding a plate rib;
step two: machining, namely machining the structural member blank, the tubular part and the inclined flange;
step three: welding, wherein a structural part, a tubular part, an inclined flange and an alignment rib are welded into a tool;
step four: milling an alignment rib;
step five: and (4) carrying out heat treatment and spraying on the tool.
2. The manufacturing method of the special tool for researching and matching the diffuser pipe of the marine diesel engine scavenging air box according to claim 1, is characterized in that: machining the inclined flange by using a numerical control planer type milling machine, and milling an inclined flange surface finished product, wherein the roughness of the inclined flange surface is Ra3.2; and drilling a hole in the flange face.
3. The manufacturing method of the special tool for researching and matching the diffuser pipe of the marine diesel engine scavenging air box according to claim 1, is characterized in that: in the fifth step, an annealing process is adopted for the heat treatment of the structural member blank, and the annealing process comprises the following steps: heating, heat preservation and cooling: firstly, feeding a tool into a furnace at 50 ℃, heating to 600 ℃ at a heating speed of 100 ℃/h, and then preserving heat for 3 hours; finally, the temperature is reduced by 50 ℃/h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054470.0A CN110883503B (en) | 2018-09-11 | 2018-09-11 | Special tool for grinding and matching diffuser pipe of scavenging box of marine diesel engine and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054470.0A CN110883503B (en) | 2018-09-11 | 2018-09-11 | Special tool for grinding and matching diffuser pipe of scavenging box of marine diesel engine and manufacturing method |
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| CN110883503A CN110883503A (en) | 2020-03-17 |
| CN110883503B true CN110883503B (en) | 2021-06-29 |
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| CN113941812A (en) * | 2021-11-02 | 2022-01-18 | 上海中船三井造船柴油机有限公司 | Positioning tool and mounting method for air inlet flange of scavenging manifold of marine diesel engine |
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| JP3127276B2 (en) * | 1993-01-13 | 2001-01-22 | 株式会社竹中工務店 | Pile horizontal resistance increase method |
| CN1179118C (en) * | 1999-11-08 | 2004-12-08 | 罗桂荣 | Gas turbine |
| CN200968782Y (en) * | 2006-04-28 | 2007-10-31 | 刘振利 | Fluid jet water mixer |
| CN101053857A (en) * | 2007-02-12 | 2007-10-17 | 曹学文 | Super-sonic diffuser for super-sonic vortex flow natural gas separator |
| CN203655421U (en) * | 2013-12-11 | 2014-06-18 | 沪东重机有限公司 | Bracket for high-power marine diesel engine booster |
| CN205445762U (en) * | 2015-12-22 | 2016-08-10 | 沪东重机有限公司 | Chilled(cooling) water supply (CWS) device of marine medium speed diesel booster |
| CN208729661U (en) * | 2018-09-11 | 2019-04-12 | 大连船用柴油机有限公司 | Marine diesel scavenging air box diffuser pipe bedding-in special tooling |
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