Non-standard design work involves a wide range of aspects, because the nature of the profession is to be able to solve all aspects of the problem, so require non-standard design workers have a wide range of learning and knowledge, the more knowledge, the more effective work, the more knowledge, more experience in solving problems, the more, the faster, more accurate. Today, I share the mistakes and overlooked details that are easy to make when designing non-standard machinery, I hope it will help you!

First, the mechanical design of the major errors that must not occur

1. contrary to the laws and regulations allow the design

2. not in line with the contents of the contract, or with the customer and the internal meeting of the company decided matters

3. no design basis (excluding empirical design or feasible innovative design, invention design)

4. does not meet the functional requirements and production capacity requirements

5. cannot be disassembled

6. Large errors in the selection of models

7. Wrong choice of material for important parts

8. large errors in the formula and parameters in the calculation book

9. major dimensional, elevation, coordinate, etc. errors

10. Serious interference occurs

11. Excessive surplus of equipment capacity

12. Safety hazards exist

13. other major errors

Second, the mechanical design of some general mistakes are easy to make

1. not in line with the drafting regulations

2. Calculation (calculation) is not enough

3. technical requirements and operational requirements (notes on the drawings) are not enough

4. wrong material list and parts list

5. inconvenience in inspection and maintenance

6. general collisions

7. Errors or deficiencies in tolerances, roughness, geometric accuracy, etc.

8. general dimensional errors

9. view errors

10. errors in text or statements, etc. (more than 5 in total are considered as 1 general error)

11. other general errors

Third, the mechanical design is easy to ignore a few details

1. design of lubrication points for rotating parts (manual or automatic)

2. the design of the rotating part of the safety cover (with an observation door)

3. more than twenty kilograms of weight parts design lifting screw holes or lifting lugs

4. bearing seat mounting position design positioning and load-bearing adjustment bolts

5. Design of adjustment shims for the connection surface involving height change or adjustment

6. design the positioning pin or positioning block for the bolted parts

7. Distinguish between field welded parts and factory welded parts

8. Indicate special welds for non-universal welding requirements

9. Cutaway oil seal reflects oil seal direction

10. design double nut relaxation for large connections

11. Note the range of non-painting

12. range of motion of moving parts (start and end position) and motion trajectory indication

13. safety design of working and non-working state

14. strengthen the load-bearing parts (such as reinforcement) and weaken the non-load-bearing parts (such as weight reduction holes)

15 improve the design of linear tolerance, fit tolerance and form tolerance

16. Reasonable design of processing roughness

17. Accurate preparation of technical requirements