The pair of bolts should be aligned with the upper and lower centers to ensure the verticality of the upper part. The misalignment amount should not exceed 1mm. It can be inspected by wire hammer and square rule. When the positioning welding is docked, the spot welding is carried out at the root with <3.2 electrode, and the positioning is strengthened in the upper spot welding fixture. Fixtures can be made of N63 angle steel and welded with J422 welding rod.
The welding process first welds the root, the post-weld transition layer, the surface root weld is applied with a large current, <3.2 electrode is welded to ensure penetration, no defects, and the defect is found to be polished and re-welded by a polishing machine. The root weld is 1/5 of the diameter of the circumference, the transition layer is 3/5 of the diameter of the circumference, and the surface layer is 1/5 of the diameter of the circumference.
Each layer of welding is inspected to ensure the quality of the welding. Each layer of the weld shall be inspected. After the root inspection is passed, the transition layer shall be welded. After the transition layer is passed, the surface layer shall be welded. In addition, the welding shall be inspected at any time during the welding process. Quality, found to be defective immediately removed re-welding.
Selection of welding energy and control of interlayer temperature The transition layer and surface layer welding use small line energy, multi-pass welding, and the interlayer temperature is controlled below 50e. Welding parameters see welding parameters welding part welding diameter mm welding current A welding voltage V welding speed cm / s root 3.2110140221012 transition layer 41150 022 251 214 surface layer 41501 022 251 2511146.5 quality measures preheating the workpiece before welding, preheating temperature control around 150e, can effectively prevent crack. After welding, due to the cold brittleness of No. 50 steel, it is easy to produce hydrogen-induced cracking. Insulation measures should be taken. Winding with 50mm of <20mm asbestos rope, keeping it for 2h3h, slowly cooling it to room temperature, then assembling it, in order to ensure the verticality of the bolt after welding. Degree, the welding should be carried out circle by circle.
Non-destructive testing performs a coloring test on the surface layer in accordance with JB4730-9. The economic benefit analysis adopts the cost of the overall replacement process: spare parts cost 20,000 yuan; construction and auxiliary materials cost 60,000 yuan; construction period 10d. The cost of welding repair method: spare parts cost 0 million yuan; construction and auxiliary materials fee 20,000 yuan; construction period 2d. From the above comparison, it can be seen that the welding method can greatly reduce the engineering cost and construction period, and at the same time, it has won time for the manufacturer and created certain economic benefits.
Conclusion By adopting the above process measures, the triple-gear bolts of the China Plate Factory have fully met the requirements for use after welding, and the operation status has been good since the recovery of production. It can be seen that for the welding of special steel materials, as long as the appropriate welding materials are selected and a reasonable welding process is adopted, excellent welding quality can be obtained to meet the requirements of users.

Marine signal lamps

CHT4 CHAT LAMP

CXD8-CDX Daylight Signal Lamp

CXH1-10B DOUBLE-DECK Starboard Light

CXH1-11P STARBOARD LIGHT

CXH1-101P DOUBLE-DECK STARBOARD LIGHT

CXH1-102P DOUBLE-DECK STARBOARD LIGHT

CXH1-102PL DOUBLE-DECK STARBOARD LIGHT

CXH2-10B DOUBLE-DECK PORT LIGHT

CXH2-11P PORT LIGHT

CXH2-101P DOUBLE-DECK PORT LIGHT

CXH2-102P DOUBLE-DECK PORT LIGHT

CXH2-102PL DOUBLE-DECK PORT LIGHT

CXH3-10B DOUBLE-DECK MASTHEAD LIGHT

CXH3-11P MASTHEAD LIGHT

CXH3-101P DOUBLE-DECK MASTHEAD LIGHT

CXH3-102P DOUBLE-DECK MASTHEAD LIGHT

CXH3-102PL DOUBLE-DECK MASTHEAD LIGHT

CXH4-10B DOUBLE-DECK STERN LIGHT

CXH4-11P STERN LIGHT

CXH4-101P DOUBLE-DECK STERN LIGHT

CXH4-102P DOUBLE-DECK STERN LIGHT

CXH4-102PL DOUBLE-DECK STERN LIGHT

CXH5-1 TOP LIGHT

CXH5-1A TOP LIGHT

CXH5-1B TTOP LIGHT

CXH6-10B DOUBLE-DECK ALL-AROUND LIGHT

CXH6-11P ALL AROUND LIGHT

CXH6-101P DOUBLE-DECK ALL-AROUND LIGHT

CXH6-102P DOUBLE-DECK ALL-AROUND LIGHT

CXH6-102PL DOUBLE-DECK ALL-AROUND LIGHT

CXH7 PANAMA STEERING LAMP

CXH8-1 Anchor LIGHT

CXH10-1 TRACK LIGHTS

CXH11 SUEZ SIGNAL LIGHT

CXH13 BOWLIGHT

CXH14 FLASHING SIGNAL LIGHT

CXH17 SIGNAL LIGHT

JJD1-1 ROTATION WARNING LIGHT

Fluorescent lamp

CBD1 Wall lamp

CBD2-N Wall lamp

CBD5 Wall lamp

CBD6 All lamp

CBD17-A,CBD17-B Fluorescent mirror light

CBD17-C,CBD17-EB Fluorescent mirror light

CBD17-D,CBD17-F B Fluorescent mirror light

CKS2 Bedside lamp

CKS3 Bedside lamp

CKS21 Bedside lamp

CKS21-A Bedside lamp

CPD1-1 Singal bulb ceiling light

CPD1-2 Double bulb ceiling light

CPD1-2N Double bulb ceiling light

CPD2-1 Singal bulb ceiling light

CPD30-1N Circular Fluorescent ceiling light

CTD1 Desk lamp

CTD2 Desk lamp

CTD5-N Desk lamp

CTD6 Desk lamp

CTD7 Desk lamp

HODU-8,HODU-15,HODU-20 Fluorescent mirror light

HODU-8A,HODU-15A,HODU-20A Fluorescent mirror light

HY-YJ203D Fluorescence induction lamp

HY-YJ203S Fluorescence induction lamp

HY-YJ204 Fluorescence induction lamp

HY-YJ205 Fire emergency lighting

JBY15-1,JBY15-1E,JBY20-1,JBY20-1E,JBY30-1,JBY30-1E Fluorescent walkway lights

JCY20-1,JCY40-1 Fluorescent ceiling light

JCY21-2L,JCY41-2L Fluorescent ceiling light

JCY22-2,JCY22-2E,JCY32-2,JCY32-2E,JCY42-2,JCY42-2E Fluorescent ceiling light

JCY22-2EF,JCY32-2EF,JCY42-2EF Fluorescent ceiling light

JCY23-2,JCY23-2E,JCY33-2,JCY33-2E,JCY43-2,JCY43-2E Fluorescent ceiling light

JCY23-2EF,JCY33-2EF,JCY43-2EF Fluorescent ceiling light

JCY24-2,JCY24-2E,JCY34-2,JCY34-2E,JCY44-2,JCY44-2E Fluorescent ceiling light

JCY24-2EF,JCY34-2EF,JCY44-2EF Fluorescent ceiling light

JCY25-2P,JCY25-2PE Fluorescent ceiling light

JCY26-1,JCY26-2,JCY26-2E,JCY26-2EF Fluorescent ceiling light

JCY27-1B,JCY27-2B Fluorescent ceiling light

JCY28-1,JCY28-2,JCY48-1,JCY48-2 Fluorescent ceiling light

JCY28-2B,JCY48-2B Fluorescent ceiling light

JCY28-2G,JCY48-2G Fluorescent ceiling light(With battery)

JCY202-2,JCY201-2,JCY402-2,JCY401-2 Fluorescent ceiling light(With battery)

JDY15-1 Seed light

JPY15-2,JPY15-2E,JPY30-2,JPY30-2E Fluorescent ceiling light

JPY20-2,JPY20-2E,JPY40-2,JPY40-2E Fluorescent ceiling light

JPY20-2A Fluorescent grille lamp(stainless steel)

JPY20-2B Fluorescent grille lamp

JPY20-3A Fluorescent grille lamp(stainless steel)

JPY20-3B Fluorescent grille lamp

JPY21-2N,JPY21-2EN,JPY41-2N,JPY41-2EN Fluorescent ceiling light

JPY22-2,JPY22-2E Fluorescent ceiling light

JPY23-2,JPY23-2E Fluorescent ceiling light

JPY24-1,JPY24-2 Fluorescent ceiling light

JPY25-2,JPY45-2 Fluorescent ceiling light

JPY26-2 Fluorescent ceiling light

JPY27-2L,JPY27-2EL,JPY47-2L,JPY47-2EL Fluorescent ceiling light

JPY30-2A Fluorescent grille lamp(stainless steel )

JPY40-2A Fluorescent grille lamp(stainless steel )

JPY40-2B Fluorescent grille lamp

JPY43-2,JPY43-2E Fluorescent ceiling light

JPY202-2,JPY201-2 Fluorescent ceiling light(With battery)

JTY06-1 Fluorescence bedside lamp

JTY08-1 Fluorescence bedside lamp

JTY08-1A,JTY15-1A Fluorescence bedside lamp

JTY08-1C Fluorescence bedside lamp

JXQ-1 Tube light

JXQ-2 Tube light

JXQ-3 Tube light

JXQ-4 Tube light

JXQ-5 Tube light

Project-light lamp

TG5,TG6 Signal searchlight

TG1-B Project-light lamp

TG2-B Project-light lamp

TG3-N Project-light lamp

CTG3-N Project-light lamp

TG4 Project-light lamp

TG7 Project-light lamp

TG7-A Project-light lamp

TG11 Project-light lamp

TG13 Project-light lamp

TG14-N Project-light lamp

TG15 Project-light lamp

TG17A Project-light lamp

TG19 Project-light lamp

TG26,TG27 Search light

TG28 Search light

TG26-B,TG27-B

TG28-B Search light

TZ1 Search light

TZ2 Search light

TZ3 Search light

TZ4,TZ5 Suez Canal searchlight

TG3-AN Signal light

CTG3-AN Project-light lamp

TG26-A,TG27-A Search light

TG28-A Search light

TZ1-A Search light

TZ3-A Search light

TZ2-A Search light

Explosion-proof lamp

CFD4 Incandescent explosion-proof lamp

CFD1 Incandescent explosion-proof lamp

CFB1 Explosion-proof induction lamp

CFT2 Explosion-proof project-light lamp

CFT1-N Explosion-proof project-light lamp

CFS1 Hand explosion-proof lamp

CFT3 Explosion-proof project-light lamp

CFY22-2,CFY42-2 Fluorescent explosion-proof ceiling lamp

CFY21-2,CFY41-2 Fluorescent explosion-proof ceiling lamp

CFY20-2,CFY20-1,CFY30-2,CFY30-1,CFY40-2,CFY40-1 Fluorescent explosion-proof lamp

CFD3-1 Explosion-proof lamp

CFD3 Explosion-proof lamp

CFD2 Explosion-proof lamp

Incandescent lamps

CCD1-2 Ceiling light

CCD1-2A Ceiling light all of plastic

CCD2-1-2 Ceiling light

CCD3-2 Ceiling light

CCD3-3 Ceiling light

CCD4-1 Ceiling light

CCD5-2 Ceiling light

CCD5-2B Ceiling light

CCD6-2 Ceiling light

CCD6-2B Ceiling light

CCD7 Ceiling light

CCD8-L Ceiling light

CCD9-2-2N Ceiling light

CCD9-3-2N Ceiling light

CCD9-5,CCD9-5A Ceiling light

CCD9-6,CCD9-6A Ceiling light

CCD11-A Ceiling light

CCD11-B Ceiling light

CCD13 Underwater light

CCD15-2 Ceiling light

CGD1 High power lights

CGD2 Warehouse light

CGD3-2 Warehouse light

CSD1 Hand lamp

CSD2 Hand lamp

CSD3 Hand lamp

CSD6 Hand lamp

CSD7 Hand lamp

CSD8 Hand lamp

DS7-1M Working light

DS7-2M Working light

DS7-2M-A Working light

DS7-3M Working light

DS7-4M Working light

W Working light

WB-1 Wall lamp

WB-2 Wall lamp

WB-2A Wall lamp

WB-2B Wall lamp


Marine Electric Spare Parts

Starboard Light, Marine Flood Light, Daylight Signal Lamp, Marine Explosion Lamp

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