The name of bench drill chuck is drill chuck. The drill chuck consists of a drill sleeve, an elastic dial ring, a connecting block and a back cover. Drill chuck is mainly used for household DC and AC electric drills. Its biggest advantage is that it is easy to lock, as long as you hold the front and rear sleeves of the chuck and tighten them, you can use it. According to the different internal structure of drill chuck, the applicable electric drill is also different.
The three main parameters of drill chuck are precision, clamping force and clamping range. Accuracy is used to control the runout of tools such as clamping handles to ensure the accuracy of machining holes. The clamping force is to ensure that the clamped handle tool does not slip and prevent the handle tool from slipping and not working.
Generally speaking, the accuracy of chuck used for bench drill is relatively high, while the accuracy of chuck used for hand drill is relatively low. The clamping range is used to control the minimum and maximum diameters of chuck clamping tools to meet the work needs. Under normal circumstances, the maximum clamping range is only about 0. 3mm larger than the chuck specification.
If it is too large, it will greatly waste materials and increase the production cost of the chuck. Theoretically, the minimum clamping range can be very small, but if it is too small, the rejection rate of manufacturers will rise and the cost will increase.
Extended data:
Drill chuck is divided into wrench type and hand tight type. The chuck of wrench drill needs to be tightened by pulling wheel, which is mainly used in machine tool industry, such as bench drill and hand electric drill. Hand-held drill chuck clamps the chuck by holding the front and rear sleeves, which is mainly used for hand electric drills.
Because the chuck of the wrench drill is tightened by the wrench wheel, which is a bevel gear with an extension arm, the torque input can be increased during the tightening process, so the clamping force of the chuck is large. Wrench chuck is widely used because of its simple structure, easy parts processing, low price and reliable performance.
Wrench chuck can be divided into light, medium and heavy according to its use. The difference between light and heavy mainly depends on the structure of its mother sleeve. Light chuck mother sleeve is formed by stamping, and heavy chuck is formed by cold extrusion, with high strength? .
The market is dominated by manual wrench drill chuck and manual wrench-free drill chuck (that is, hand-tight drill chuck). Its fatal weakness is insufficient clamping force, that is, it slips during work and cannot be used normally. Patented products solve the problem of insufficient clamping force.
This kind of drill chuck is similar to the hand-held drill chuck in appearance, and the operation method is the same, that is, the clamping force can be manually input, but when the clamping force manually input is insufficient, the clamping force can be automatically input, thus successfully completing the drilling work. Both positive and negative situations can be used, which is more suitable for supporting impact electric drills and is a replacement product.
References:
Baidu encyclopedia-drill chuck