Cold extrusion processing fixture for internal thread of cylindrical nut, anti-twist chuck and processing method
A nut internal thread, cold extrusion technology, applied in the direction of manufacturing tools, threaded products, metal processing equipment, etc., can solve problems such as large volume and multiple production spaces, achieve firm clamping, improve automation, and enhance strength. Effect
Pending Publication Date: 2019-10-08
三门驰骋汽配有限公司
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Problems solved by technology
However, this device is large in size and needs to occupy more production space, and because the larger the nominal diameter of the internal thread, the greater the torsional force on the nut and clamp when the thread is pressurized, and the greater the pressure on the support that supports the nut. , the device is only suitable for the processing of internal threads of hexagon nuts with a nominal diameter of M12-M24.
In addition, if a non-standard cylindrical nut is processed, a special clamping device for the cylindrical surface of the cylindrical nut is required to prevent the cylindrical nut from shaking due to excessive force during processing, and the above-mentioned device does not have the above considerations, so here The fully automatic vibration cold extrusion plastic forming device for thread is not suitable for cylindrical nuts
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[0061] The patent application of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments (embodiments). The specific embodiments described here are only used to explain the patent application of the present invention, but not as the basis for limiting the patent application of the present invention.
[0062] see Figure 1-8, the first fixture provided by the present application: a fixture for cold extrusion processing of cylindrical nut internal thread, including a rotary chuck assembly 5 arranged on the operating platform 1, and a clamping assembly 7 and a limiter used in conjunction with the rotary chuck assembly 5 Position plate 8; the rotary chuck assembly 5 can rotate around the axis and fixed axis, including a positioning chuck 51 stacked from top to bottom, an anti-twist chuck 52 and a receiving chuck 53, and the three chucks pass through The bolts are fixedly connected, and the edge of the positioning...
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The application relates to a cold extrusion processing fixture for the internal thread of a cylindrical nut, an anti-twist chuck and a processing method. The cold extrusion processing fixture for theinternal thread of the cylindrical nut comprises a rotary chuck component arranged on an operating platform, and a clamping component and a limiting plate which are used in cooperation with the rotarychuck component; and the rotary chuck component can be rotated around the fixed axis, and comprises a locating chuck, the anti-twist chuck and a bearing chuck which are stacked from top to bottom. The cold extrusion processing fixture for the internal thread of the cylindrical nut has the functions of double limitation, limit and support separation and firm clamping. According to the anti-twist chuck provided by the application, through arrangement of a transition notch, the thickness is increased, and the torsional strength is improved; internal threads with larger nominal diameter can be machined; according to the cold extrusion processing method for the internal thread of the cylindrical nut, the internal air pressure of the nut is stable during tapping, and cooling liquid can flow smoothly; and the purposes of preventing the cylindrical nut from falling off and loosening the nut in a fixed point mode can be achieved through a stop plate.
Description
technical field [0001] The patent application of the present invention relates to the technical field of thread forming, in particular to a jig for cold extrusion processing of a cylindrical nut internal thread, an anti-twist chuck and a processing method. Background technique [0002] In the prior art, the processing of internal threads mostly adopts the processing method of removing material, such as using an internal thread turning tool to turn and process threads on a lathe, using a tap to tap a thread on a drill press, a lock bed, or a lathe, or using a thread milling cutter on a lathe. Methods such as milling and processing threads on the machining center. [0003] Different from the traditional cutting and tapping methods mentioned above, cold extrusion forming of internal thread is an emerging internal thread forming process, which uses the edge teeth of the taper part of the extrusion tap to extrude the workpiece metal of the prefabricated bottom hole, so that The ...
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IPC IPC(8): B21H3/08B21H9/00
CPCB21H3/08B21H9/00
Inventor 缪巍巍周文彬周俊
Owner 三门驰骋汽配有限公司