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1、盘角齿轮加工工艺及钻孔夹具设计（外文翻译）院 系： 光信息机电工程系 专 业： 机械设计制造及其自动化 姓 名： 指导教师： 二九年五月1.Machining Technology Handbook, Volume 1 M. Muong for Machinery Industry Press, 1991Work piece in the clamping fixture In the machining process, the work piece by the cutting force, centrifugal force, inertia force, such as the rol
2、e of, in order to ensure that these external force, the work piece can remain in the fixture by the positioning of the processing to determine the location of components, and should be no vibration or displacement, fixture structure should be set up reliable work piece clamping device folder will be
3、 in prison. First, the composition of clamping devices Many different types of clamping devices, but their structures are composed of two parts. 1. Power plant The source of clamping force, one human; second is generated by a power device. The device can generate power as the power unit fixture. Com
4、monly used in power plant are: pneumatic devices, hydraulic devices, electrical devices, electromagnetic devices, gas - liquid interaction devices and vacuum devices. Fixture as a result of manual clamping force from the human, so it does not power plants. 2. Clamping part Receive and impart into th
5、e original clamping force to clamp the task force and part of the implementation of the general composition of the following agencies: 1) to accept the original force of bodies. Such as handles, nuts, and used to connect the institutions, such as cylinder piston rod. 2) Force the middle of delivery.
6、 Such as hinges, levers and so on. 3)Clamping components. Such as plate, such as screws. Force delivery of them in the middle of the original transmission of force to the process of clamping devices can play, such as changes in the direction of force to change the size of forces, as well as the role
7、 of self-locking and so on. Second, the basic requirements for clamping device Without damaging the work piece positioning accuracy, and quality assurance process under the premise of clamping devices should be enabled to: 1. The size of the appropriate clamping force. It is necessary to ensure that
8、 the work piece in the whole process of its stable position, vibration small, but also so that the work piece does not produce excessive clamping deformation. 2. Technology is good. The complexity of the clamping device should be suited to the production of the Program, to ensure production efficien
9、cy, its structure should be kept simple, easy to manufacture and maintenance. 3. Good use. The operation of clamping device should be convenient, safe and labor-saving. Third, the basic Clamp The original force into a clamping force through the clamping body to achieve. Among the many institutions i
10、n the clamping wedge oblique, spiral, and by their eccentric combination of the most common application of clamping. (A) Wedge Clamp Wedge used as components or transmission of the clamping device clamping body known as the Wedge Clamp. Wedge clamping directly, the oblique wedge of the self-locking
11、conditions are: Wedge angle smaller than the work piece Wedge, Wedge and folders between the concrete and the friction angle. Namely: a f1 + f2 In order to ensure a reliable self-locking, manual clamping generally take a = 6 8 . Using pneumatic or hydraulic device drivers do not need the self-lockin
12、g oblique wedge, it is desirable to a = 15 35 . Wedge clamp is simple in structure, than by large, self-locking features such as performance, it is widely available. (B) Helical Clamp Used as intermediate screw transmission components are collectively referred to as the clamping screw clamping body
13、organs. Because of its simple structure, reliable clamping, common good, and as a result of the small helix angle, spiral of self-locking clamping body good, clamping force and the clamping itinerary are larger fixture on manual with the most a clamping body. 1. Simple screw clamp body The simplest
14、spiral as a result of the direct use of clamping bodies pressed work piece screw head, so easy to damage the surface of the work piece under pressure, or driven rotating work piece. So often in the head with swinging Press. Press with the work piece as a result of friction between the Press and the
15、torque is greater than the friction between the screw torque, screw together with the Press will not rotate. Clamping action slow, time-consuming loading and unloading the work piece is a single spiral Another drawback of the Clamp. To overcome this shortcoming, the rapid clamping bodies can be. 2.
16、Clamp screw plate Institutions in the clamping, the use of spiral plate is very common, common structure of the spiral structure of a typical plate size has been standardized, the designer can refer to the relevant national standards and fixture design manual design. (C) Eccentric Clamp With eccentric pieces, dir
