上海Application of powder metallurgy in motorcycle field

Life is inseparable from transportation. As a convenient transportation work after 2000, the development speed of motorcycles is self-evident. According to the data, the output of motorcycles in China was only 50000 in 1981, rose to 5.22 million in 1994, rose to 17.74 million in 2005, rose to 21.26 million in 2006, rose to 25.46 million in 2007, rose to 27.5 million in 2008, and will fluctuate in the next few years, with 25.47 million in 2009 and 26.59 million in 2010, In 2011, 27 million vehicles were produced * * *.

According to the statistics of the China Association of Automobile Manufacturers, although the domestic motorcycle production has decreased at present, it is still a very large market. In 2016, the motorcycle output was 16.8 million, in 2017, 17.135 million, and in 2018, 15.57 million. In 2019, with the gradual completion of the national four standards, China's motorcycle production capacity showed a steady and growing trend, including 17.367 million in 2019, 11.5% YoY in 2018,

Such a huge output has opened up a huge and broad market for the development of powder metallurgy production. In view of the characteristics of powder metallurgy parts that are suitable for mass production, material saving, energy saving, uniform quality, can manufacture parts with complex shapes, low production cost, and high production efficiency, we should vigorously develop powder metallurgy parts for motorcycles and strengthen the application of powder metallurgy parts in motorcycle manufacturing. For example, the early domestic motorcycle brands, such as "Jialing", "Jinan", "Hongdu", "Xingfu" and "Nanfang", used dozens of kinds of powder metallurgy, covering all parts of the engine and frame. These P/M parts have been produced and used for a long time, and their performance and process are stable. They have made important contributions to material saving, energy saving and motorcycle production cost reduction.

The powder metallurgy parts made by domestic motorcycle engine Dongmu powder metallurgy manufacturers include:

1. Oil pump shaft sleeve

2. Shaft sleeve

3. Spacer sleeve

4. Control cam and plunger cam

5. Water pump shaft sleeve

6. Outer rotor of oil pump

7. Input and output oil pipe mounting base

8. Inlet and exhaust valve seat rings

9. Inlet and exhaust valve guide

10. Positioning plate

11. Lower the inner and outer rotors of the oil pump

12. Inner rotor of oil pump

13. Electric starting bushing and pressing block

14. Rocker arm support column

15. Inlet and exhaust valve guide

16. Driven gear of oil pump

17. Foot start pinion

18. Intermediate gear sleeve

19. Electric starting intermediate gear

20. Mounting rod shaft sleeve

21. Right copper sleeve of driving wheel

22. Inlet and exhaust valve seat rings

With the improvement of foreign powder metallurgy technology, domestic large powder metallurgy manufacturers began to use the technology introduced from Japan. Among them, Dongmu Group took the lead in introducing new technology into China in the domestic * * * powder metallurgy company, changing the backward situation of China's technology from a high level. At present, more than 15 domestic motorcycle manufacturers have cooperated or joint ventures with Japanese motorcycle companies. In Japan, the powder metallurgy parts used in motorcycle production are basically low-density, medium density and uncomplicated.

In Japan, the * * * * of motorcycles that * * * has matured early is also a part of the powder metallurgy industry used in * * *'s early research and mass production of motorcycles. The * * * early powder metallurgy plant is Hitachi Powder Metallurgy Co., Ltd. The motorcycle parts used at that time are:

1. Cam sprocket

2. Recoil gear

3. Tensioner sprocket

4. Internal and external starter reduction gear

5. Gear movement of primary drive

6. Oil pipe

7. Primary driven gear

8. Timing chain wheel

9. Starter sprocket

10. Spindle gear

11. Secondary shaft

12. Valve element

13. Spacer

14. Roller cage

15. Roller

16. Recoil gear support

17. Variable speed cam support

18. Clutch riser cam and pivot

19. Adjustable pulley

20. Plunger cam

21. Turbine

In Taiwan, the powder metallurgy factory of * * * in Taiwan at that time had a Baolai company. In 1997, the annual production capacity could reach about 1.8 billion Taiwan dollars. This company produced more * * * motorcycle parts in its early days. At that time, there were 9 manufacturers of motorcycle factories in Taiwan. In the early 1990s, Taiwan's annual production capacity of motorcycles was about 1.5 million, while Taiwan's guaranteed capacity of motorcycles was 10 million, so motorcycle parts were also highly valued, The motorcycle accessories made of powder metallurgy include:

1. Clutch riser cam

2. Clutch hub bushing

3. Spring seat of recoil starter

4. Drive gear B

5. Centrifuge center

6. Primary driven gear

7. Inner and outer rotors of oil pump

8. Clutch riser cam

9. Clutch riser arm

10. Bushing

11. Timing chain wheel

12. Starter drive sprocket

13. Rocker arm pivot

14. Crankshaft washer

15. Secondary shaft bushing

16. Spacer sleeve

17. Guide ring

18. Valve guide

19. Clutch release lever

20. Bushing

21. Brake pad

22. Rod

23. Rear Swivel Arm Bushing

24. Oil valve

25. Front fork piston and guide tube

26. Rear Cushion Spring Guide