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Bench fitter technical grade post standard

I. Definition of occupation

According to the technical requirements, use locksmith tools and drilling machines to process, trim and assemble workpieces.

Second, the scope of application

Manufacturing, marking, scraping and assembly of parts; Operation and maintenance of special equipment, such as vertical drill, rocker drill and bench drill.

Third, the technical grade line

Elementary, intermediate and advanced

Junior fitter

I. Knowledge requirements

1. Name, model, specification, performance, structure and transmission system of self-use equipment.

2. Lubrication system, usage rules and maintenance methods of self-use equipment.

3. Names, specifications, uses, usage rules and maintenance methods of commonly used tools, fixtures and measuring tools.

4. Types, brands, specifications and performance of commonly used tools; Influence of tool geometry parameters on cutting performance: reasonably selecting cutting parameters and methods to improve tool life.

5. Types, brands, mechanical properties, cutting performance and knowledge of thermal expansion during cutting of commonly used metal materials; Common sense of metal heat treatment.

6. Types and uses of commonly used lubricating oils; Types and uses of common cutting fluids and their effects on surface roughness.

7. Basic knowledge of mechanical drawing, tolerance fit, form and position tolerance and surface roughness.

8. Common sense of mathematical calculation.

9. Basic knowledge of mechanical transmission and typical mechanism.

10. Introduction of hydraulic transmission and pneumatic transmission.

1 1. Basic knowledge of locksmith's operation and assembly.

12. Structure, transmission and indexing method of the indexing head.

13. Understand the determination of machining allowance of parts.

14. Types and use of jig.

15. Knowledge of structure and use of quick change chuck and tapping chuck.

16. Types, uses and sizes of threads; Method for determining the diameter of thread bottom hole and round rod during tapping.

17. Scraping knowledge; Principle and method of scraping original flat plate.

18. Grinding knowledge; Types and preparation methods of abrasives.

19. Correction and bending methods of metal bars and plates.

20. Types, uses, dimensions of various parts of the spring and methods for determining the force.

2 1. Causes of waste products and preventive measures.

22. General process knowledge of related work.

23. General electrical knowledge and safe use of electricity; Composition and application of machine tool electrical equipment.

24. Safety technical regulations.

Second, the skill requirements

1. Use and maintain self-use equipment.

2. Select and maintain various tools, fixtures and measuring tools for personal use.

3. Grinding of various cutter heads and drills; Quenching and sharpening of scraper, chisel, sample punching, needle mark and gauge mark.

4. Understand part drawings and assembly drawings, draw simple part drawings, and correctly implement process regulations.

5. Selection of datum plane for general workpiece marking and installation of workpiece during marking.

6. Select reasonable drilling parameters according to workpiece materials and cutting tools.

7. Install universal workpieces on universal and special fixtures.

8. For scribing, drilling, tapping and reaming of common workpieces (the contact area of tapered holes by coloring method is more than 70%), the surface roughness of reaming can reach Ra 1.6? m .

9. Scrape the flat plate with 2-level accuracy.

10. Make angle template and simple arc template.

1 1. All kinds of springs with steel wire diameter less than 3mm are coiled.

12. Assembly of parts of general machinery and general assembly of simple machinery (hoist, electric hoist, etc.). ).

13. Correctly implement safety technical operation procedures.

14. It meets the requirements of post responsibility system and civilized production.

Three. Examples of works

1. There should be no obvious deviation when tapping the screw hole below M20.

2. Scraping both planes is 350mm? 250mm right-angle iron (bending plate), the accuracy reaches level 2.

3. Make a positive six-force analysis board (component) with a gap of not more than 0.05mm, which can exchange directions relatively.

4. Will. 50mm？ Cut a 50 mm round bar file into a regular hexahedron. The tolerance zone of basic dimensions is h8, the tolerance values of flatness and verticality are 0.04mm, and the surface roughness is Ra 1.6? m .

5. Drill eight reamers on the same circumference of a steel plate with a thickness of 20mm? What is the position tolerance value of each hole for the equally divided hole of 16H8? 0.2mm, surface roughness Ra 1.6? m .

6. The processing and assembly of the tailstock of the horizontal lathe or the assembly of the sliding box meet the technical requirements.

7. The assembly of simple machinery such as hoist or electric hoist meets the technical requirements.

Intermediate fitter

I. Knowledge requirements

1. Names, uses, use and maintenance methods of commonly used measuring instruments.

2. The structure, use, adjustment and maintenance methods of common tools and fixtures (including combined fixtures).

3. Basic knowledge of metal cutting principles and tools.

4. Basic knowledge of hydraulic transmission.

5. Have knowledge of drawing complex part drawings and simple assembly drawings.

6. Working principle and structure of general mechanical equipment (pumps, fans, freezers and typical machine tools, etc.). ).

7. Principle and structure of internal combustion engine.

8. Prepare the basic knowledge of mechanical equipment assembly process specification.

9. Marking methods for complex workpieces (including large and deformed workpieces).

10. Types and uses of cams, calculation and marking methods of dimensions of each part; Marking method of curve; Expansion method of cone and polyhedron.

1 1. Balance types, basic principles and correction methods of rotating parts.

12. knowledge of babbit casting of bearing bush.

13. Assembly method of precision sliding bearing and rolling bearing.

14. Quality requirements and inspection methods of gearbox assembly.

15. Factors affecting general mechanical accuracy, methods of checking accuracy and factors affecting measurement accuracy.

16. the influence of machine tool accuracy on workpiece accuracy, and the methods to improve workpiece machining accuracy and refine surface roughness.

17. working principle, structure and application knowledge of hydrostatic guide rail and hydrostatic bearing.

18. Methods to prevent deformation when machining workpieces.

19. Basic knowledge of CNC machine tools.

20. General machine tool processing knowledge, general workpiece processing technology.

2 1. Knowledge of production technology management.

Second, the skill requirements

1. Understand more complicated assembly drawings and draw complicated parts drawings.

2. According to the technical requirements of the workpiece, prepare the processing technology.

3. Design and draw a simple process equipment diagram.

4. Drill small holes, inclined holes, deep holes, holes, butt holes and cross holes that meet the requirements of drawings on complex workpieces.

5. Three-dimensional scribing of workpieces with complex shapes.

6. Grinding taper inspection spindle and high-precision machine tool spindle hole, contact quality, accuracy and surface roughness meet the technical requirements.

7. According to the technical requirements of mechanical equipment, prepare the assembly process sequence.

8. Dynamic and static balance of rotating parts.

9. Test the performance of various hydraulic components on the hydraulic test bench.

10. Assemble compressor, air hammer, press and high-pressure pump, etc. , meet the technical requirements.

1 1. Assemble a typical machine tool and check the accuracy.

12. According to the quality of the workpiece and the operation of the machine tool, distinguish whether the machine tool works normally.

Three. Examples of works

1. leveling the leveling ruler or bridge leveling ruler with the length of 1500mm, with the accuracy of 1.

2. The marking and manufacturing of disc cam meet the technical requirements.

3. Draw the processing line of roots blower shell and blade.

4. Drilling of complex hydraulic valve body (such as control box).

5. Drill and ream three 620mm holes on a steel plate with a thickness of 20 mm, with a center distance of 100mm and a surface roughness of Ra3.2? M, what is the tolerance value of the position? 0. 1 mm.

6. Assemble a horizontal lathe, which meets the technical requirements.

7. Assemble the guideway grinder to meet the technical requirements.

8. Assemble a 7.36kW diesel engine to meet the technical requirements.

9. Machining workpieces and assembly parts with corresponding complexity.

Senior fitter

I. Knowledge requirements

1. Working principle of precision measuring instrument.

2. Principles of common mechanical parts and various mechanisms

3. The working principle and structure of complex and high-precision mechanical equipment.

4. Quality inspection and evaluation methods of new products after assembly.

5. Compilation method of complex workpiece processing technology and assembly process specification for precision and complex mechanical equipment.

6. Various extrusion processing methods.

7. Basic knowledge of machine tool electrical control.

8. Knowledge of hydraulic transmission.

9. Basic knowledge of improving productivity.

10. Basic knowledge of microcomputer application.

Second, the skill requirements

1. Design advanced process equipment, draw process equipment drawings, and prepare assembly process regulations.

2. Put forward suggestions for improving the technological process of key parts processing.

3. In the trial production of new products, qualified parts are processed according to the technical requirements of difficult parts.

4. Grinding workpieces with high precision and complex shapes.

5. Solve the technical problems in fitter's operation and assembly, and assemble large, precise, complex and high-speed mechanical equipment.

6. Assemble new products that meet technical requirements according to the drawings; Assemble and adjust program control and CNC machine tools.

7. Understand the mechanical and electrical schematic diagram.

8. Apply and popularize new technologies, new processes, new equipment and new materials.

Three. Examples of works

1. Workpiece with high grinding accuracy and complex shape, tolerance level lT4, surface roughness Ra0.05? m .

2. Parts with high machining accuracy and complex shapes meet the technical requirements.

3. Assemble the gear grinding machine that meets the technical requirements.

4. Assemble a large high-speed internal combustion engine, which meets the technical requirements.

Assembly and adjustment of new electromechanical integration equipment such as program-controlled machine tools and CNC machine tools.

Those certificates are invalid for those who engage in technology in society. What the company needs is 5~ 10 years of practical work experience.