What is the role of the pulley

　　PulleyWhat is the role

The pulley is generally made of steel, aluminum alloy, cast iron, brass and other materials. The inner holes include round holes, D-shaped holes, and tapered holes. Surface treatment includes natural oxidation, blackening, zinc plating, color zinc plating and high frequency quenching. Today we look at the relevant knowledge of the pulley in the processing and its processing process.

The pulley belongs to the hub part, the general size is relatively large, and its manufacturing process is mainly casting and forging. Generally, the larger size design is casting, the material is generally cast iron (good casting performance), and cast steel is rarely used (poor casting performance of steel); generally speaking, the smaller can be designed as forgings, made of steel. Pulleys are mainly used for power transmission in remote places, such as power output of small diesel engines, agricultural vehicles, tractors, automobiles, mining machinery, mechanical processing equipment, textile machinery, packaging machinery, lathes, forging and pressing beds, power transmission of some small horsepower motorcycles, power transmission of agricultural machinery, air compressors, reducers, reducers, reducers, generators, cotton gins, etc.

What is the principle of choosing pulley?

The selection of various indicators and materials of the pulley is based on the principle of less raw materials, feasible process and low cost on the premise of meeting the requirements of use.

What are the transmission advantages of the pulley?

The advantages of the pulley drive are: the pulley drive can relieve the load impact; the pulley drive runs smoothly, with low noise and low vibration; the pulley drive structure is simple and easy to adjust; the manufacturing and installation accuracy of the pulley drive is not as strict as the meshing drive; the pulley drive has Overload protection function; the adjustment range of the center distance of the two shafts of the pulley drive is large. The disadvantages of belt transmission are: the pulley transmission has elastic sliding and slipping, the transmission efficiency is low, and the transmission ratio cannot be maintained; when the pulley transmission transmits the same large circumferential force, the profile size and pressure on the shaft are greater than the meshing transmission; the pulley transmission belt life Short. The diameter and other dimensions of the pulleys of various mechanical equipment are matched according to the reduction ratio, and are designed according to the working speed and motor speed.

what is the pulley processing flow?

When processing, according to the drawings to complete the corresponding processing work.

1. According to the requirements of the drawings, the shape of the belt should be roughly processed first, and the thickness, outer hole and inner hole should be paid attention.

2. According to the type of tooth slot required for tooth slot machining, cut and program the tooth slot for machining and forming the tooth slot.

3. For the inner hole groove, it is necessary to use a slotting machine or wire cutting. According to these, the processing of the inner hole groove is completed.

4. If the pulley you are processing has a rim, you only need to weld the rim to complete the entire processing process.

　　PulleyIt consists of a pulley and a closed endless belt with teeth on the surface. When moving, the cogs of the belt and the pulley will mesh together, which is too much in our lives. Through this continuous engagement, the pulleys generate power. Timing belt wheels are widely used, such as automobiles, tobacco, office equipment, textiles, lighting stage, steel machinery, instrumentation, etc.

Cut three samples with a length of 250 mm from one PJ V-ribbed belt, and mark a marking line with a spacing of 100mm at the middle position of the PJ V-ribbed belt. When more than three samples cannot be taken from one PJ V-ribbed belt, samples can be cut from the same batch of PJ V-ribbed belt, but must be indicated in the report. 7.4.2 High temperature resistance test method
Place the sample at 100 ℃ ± 2 ℃ for 96 h ± 1 h and then take it out. After standing at laboratory temperature for more than 2h, bend it along a cylinder with a diameter of 20 mm at a contact angle of at least 90 °.