Tumbling steel belt shot blasting machine

Introduction of Tumbling steel belt shot blasting machine

gear drive

The main advantages of the gear transmission are: ① constant instantaneous transmission ratio, smooth operation, accurate and reliable transmission, and can transmit motion and power between any two shafts in space; ② suitable for a wide range of power and speed, power from tiny values close to zero Up to tens of thousands of kilowatts, the peripheral speed is very low to 300m / s; ③High transmission efficiency, η = 0.92 ～ 0.98, in common mechanical transmission, the transmission efficiency of the gear is high; ④Reliable operation, long service life; Outer profile Small size and compact structure.

The main disadvantages of gear transmission: high precision in manufacturing and installation, special equipment manufacturing, and high cost, it is not suitable for transmission between two shafts at a long distance.

The basic requirements that the gear transmission should meet are: ① The instantaneous transmission ratio is unchanged, the impact, vibration and noise are small, which can ensure better transmission stability and higher motion accuracy; ② Under the premise of small size and light weight, the wheel The teeth have high strength, good wear resistance, and large carrying capacity, which can achieve the expected working life.

Belt drive

The main advantages of belt transmission: ① cushioning and vibration absorption, stable transmission and low noise; ② belt transmission is driven by friction, and slippage between the contact surface of the belt and the pulley during overload can prevent damage to other parts; ③ is suitable for the central moment of two shafts Larger occasions; ④ The structure is simple, manufacturing, installation and maintenance are more convenient, and the cost is low.

Disadvantages of belt transmission: ① can not guarantee the accurate transmission ratio; ② requires a larger tension, which increases the stress of the shaft and the bearing; ③ the overall size of the entire transmission device is large and not compact; ④ the life of the belt Shorter, lower transmission efficiency.

In view of the above characteristics, the belt drive is mainly suitable for: ① High-speed occasions, mostly used for the first-stage transmission of the prime mover output. ②Small and medium power transmission, usually no more than 50 kw. ③ The transmission ratio generally does not exceed 7, and the maximum is 10. ④ The transmission ratio is not required to be very accurate.

Chain drive

The chain transmission has some characteristics of belt transmission and meshing transmission. Its advantages are: the chain transmission has no elastic sliding and slipping, and can maintain an accurate average transmission ratio; the transmission size is relatively compact; it does not require a lot of tension and acts on the shaft. The load is small; the bearing capacity is large; the efficiency is high (η = 0.95 ～ 0.98). At the same time; chain drive can absorb vibration and mitigate impact, simple structure, low processing cost, low installation accuracy requirements, suitable for transmission with large center distance, and can work in harsh environments with high temperature, high humidity and heavy oil pollution.

The disadvantages of the chain drive are: it is not stable enough at high speeds; there are shocks and noise in the drive; it is not suitable for use in drives with large load changes and rapid reverse rotation; it can only be used for drives between parallel shafts; High transmission.

Applicable occasions of chain transmission: widely used in transmission with large center distance, multi-axis, and average transmission ratio requirements. The chain drive can be used in the harsh environment of open transmission, low-speed heavy-duty transmission and well-lubricated high-speed transmission. The power transmitted by the roller chain is usually below 100kw, the chain speed is below 15m / s, and the transmission ratio I <= 7. At present, the maximum transmission power can reach 500kw, and the maximum center distance can reach 8m.

　　Automotive Shot Blasting and Peening solutions

　　Sandblasting is to use compressed air to spray abrasive to the surface of workpiece at high speed. The purpose of sandblasting is to improve the appearance quality of workpiece surface by removing oxide layer and rust. Shot peening is to make the high-speed hard particles (generally steel particles) hit the surface of metal workpiece, in order to improve the fatigue strength of metal surface. Sand blasting and shot blasting are two different processes and different tools are used. However, both of them can be recycled.

　　The technology of shot blasting cleaning machine replaces the common cold and hot forming process to form large thin-walled aluminum parts, which can not only avoid the residual tensile stress on the surface of the parts, but also obtain the favorable compressive stress for the parts.

　　It should be noted that the service temperature of the parts treated by shot blasting machine should not be too high, otherwise the compressive stress will disappear automatically at high temperature, thus the expected effect will be lost. Their service temperature is determined by the material of the parts, which is about 260-290 ℃ for general steel parts and 170 ℃ for aluminum parts.