Abstract
To solve the problems of poor sawing surface quality, severe blade wear and high power consumption caused by unreasonable working parameters in the process of Caragana korshinskii (C.K.) stumping, this study explored the effects of branch diameter (D), sawing speed (vc), feeding speed (vf), cutting inclination (α), number of circular saw teeth (T) and moisture content (M) on sawing power consumption (P) and sawing surface quality (A) through a single-factor test using a homemade branch sawing bench. Based on the Box–Behnken design principle, a multi-factor test was carried out based on a single-factor test with vc, vf, α and T as influencing factors and with P and A as targets, establishing a regression model. The test results show that the sawing power consumption (P) increases with increasing D, decreases with increasing M, and decreases first and then increases with increasing vc, vf, α and T; the sawing surface quality (A) increases first and then decreases with increasing D, increases with increasing M, and first increases and then decreases with increasing vc, vf, α and T. The optimum combination of parameters for the regression model was obtained with vc of 45.24 m/s, vf of 0.34 m/s, α of 10° and T of 100, which resulted in the P of 177.46 J and A of 85.87%. The errors between the predicted and actual values of P and A are 3.1% and 6%, respectively. The study can provide information to support the development of subsequent C.K. stubble equipment.
Highlights
Caragana korshinskii (C.K.), as one of the most important plants for sand fixation, can improve desertification in Western China [1,2,3], and plays an important role in the management of desertification of China [4,5]
Stubble rejuvenation is an important measure in the management of sandy shrubs during their growth and is the key to the healthy and sustainable development of shrubbery forests [7]
Exploring the performance parameters of the C.K. branches is of significant importance to the development of stubble equipment
Summary
Caragana korshinskii (C.K.), as one of the most important plants for sand fixation, can improve desertification in Western China [1,2,3], and plays an important role in the management of desertification of China [4,5]. Stubble rejuvenation is an important measure in the management of sandy shrubs during their growth and is the key to the healthy and sustainable development of shrubbery forests [7]. Depending on the growth characteristics of C.K., the branches need to be stumped once every 3–5 years, otherwise its growth slows down and even dies naturally [8]. The main harvesting method of C.K. is manual cutting or using backpack cutters for stubble harvesting, which is inefficient, labor heavy and damaging to the body [9]. As the planted area continues to expand, relying on manual cutting cannot meet production requirements, and the need for mechanized stubble harvesting equipment is becoming increasingly urgent. Exploring the performance parameters of the C.K. branches is of significant importance to the development of stubble equipment
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