A variable diameter elastic mandrel clamping device
A clamping device and elastic core technology, applied in the field of machining fixtures, can solve the problems of poor workpiece positioning and anti-deformation capabilities
Active Publication Date: 2016-08-17
HEFEI METALFORMING MACHINE TOOL
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a variable-diameter elastic mandrel clamping device for workpieces with inaccurate inner diameters and poor anti-deformation capabilities of the fixtures in the prior art, which are suitable for inaccurate inner diameters and require a certain degree of resistance. Capable of processing deformation and workpieces with temperature changes and frequent replacement during processing, easy to clamp, and can carry a certain amount of rotational force
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[0023] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only for explaining the present invention, and are not intended to limit the present invention.
[0024] Such as figure 1 figure 2 A variable diameter elastic mandrel clamping device is shown, including a mandrel 1, a jacket 2, a first elastic member 3, and a second elastic member 4. One end of the mandrel 1 is a truncated cone 11 with successively smaller diameters, and the other end is a cylinder 12 with equal diameters. The diameter of the cylinder 12 is smaller than the maximum diameter of the truncated cone 11 , and the cylinder 12 is coaxial with the truncated cone 11 . The casing 2 comprises several petals 21 which can be combined into a cylindrical shape. The two...
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The invention discloses a reducing elastic mandrel clamping device which comprises a mandrel, an outer sleeve, a first elastic part and a second elastic part. A cone frustum with the diameter sequentially decreased is arranged at one end of the mandrel, and an equal-diameter cylinder is arranged at the other end of the mandrel. The outer sleeve comprises a plurality of segments which can be combined into a cylinder, grooves are formed in two ends of the outer wall of the outer sleeve, and the second elastic part is arranged in the grooves. A conical cavity for containing the cone frustum is formed inside one end of the outer sleeve, and a first baffle plate is arranged on the end face of the outer sleeve. A cylindrical cavity for containing the first elastic part is arranged inside the other end of the outer sleeve, and a second baffle plate is arranged on the end face of the outer sleeve. The cone frustum and the first elastic part are limited inside the outer sleeve by the first baffle plate and the second baffle plate. By the aid of elastic reducing mandrel technology, the reducing elastic mandrel clamping device is applicable to workpieces with inaccurate inner diameters, simple and convenient in clamping and capable of bearing a certain rotating force. A pressure spring is positioned in the outer sleeve, the workpieces cannot be abraded, rust stains on the inner walls of the workpieces cannot enter the gap of the pressure spring to cause mechanism failure, and mechanism failure caused by heating and annealing of the pressure spring due to machining is avoided.
Description
technical field [0001] The invention relates to a machining fixture, in particular to a variable-diameter elastic mandrel clamping device. Background technique [0002] Fixtures are process devices used to fasten parts quickly during processing to keep machine tools, tools and parts in correct relative positions. Fixtures are an indispensable part of mechanical processing. Driven by the development of machine tool technology in the direction of high speed, high efficiency, precision, compound, intelligence and environmental protection, fixture technology is developing in the direction of high precision, high efficiency, modularity, combination, general purpose and economy . At present, for workpieces with deviations in the inner diameter, relatively small processing force and temperature changes during processing, commonly used quick clamping fixtures include: cylindrical mandrel fixtures, small taper conical mandrel fixtures and spring leaf mandrel fixtures. [0003] Cyli...
Claims
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IPC IPC(8): B23B31/40B23K37/053
CPCB23K37/0531
Inventor 李琴林赵磊任建忠
Owner HEFEI METALFORMING MACHINE TOOL