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Hydraulic expansion mandrel

A technology of expanding mandrel and hydraulic pressure, applied in the direction of expanding mandrel, gear teeth, gear cutting machine, etc., can solve the problems of difficult maintenance and manufacturing, high cost, complex structure, etc., and achieve the effect of improving stability

Inactive Publication Date: 2020-10-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although some existing hydraulic expansion mandrels on the market can also guarantee the accuracy requirements, their structures are complex, costly, and relatively difficult to maintain and manufacture.

Method used

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  • Hydraulic expansion mandrel
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Effect test

Embodiment Construction

[0013] In order to clearly illustrate the technical characteristics of the present solution, the present invention will be further elaborated below through specific implementation modes and in conjunction with the accompanying drawings.

[0014] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, a hydraulic expansion mandrel includes a shaft body 1, a shaft core 2, a set screw 3, a sealing ring 4, a push rod 5 and hydraulic oil 6, the shaft body 1 is a hollow integral structure, and the left end of the shaft body 1 is provided with Shaft shoulder, two positioning notches are arranged on the outer circumference of the shaft shoulder, the two positioning notches are arranged symmetrically, and the inside of the shaft body 1 is provided with a top hole, a threaded hole, a positioning hole and a thin-walled light hole. The outer circumference of the shaft core 2 is provided with a plurality of circumferential ring grooves, the sealing ring 4 is installed in the circu...

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Abstract

The invention relates to the field of machining and detection of gears, slotting cutters, gear shaving cutters and hobbing cutters, in particular to a high-precision hydraulic expansion mandrel for accurately clamping to-be-treated pars in machining and detection. The hydraulic expansion mandrel comprises a shaft body, a shaft core, a set screw, a sealing ring, a push rod and hydraulic oil. The shaft core is screwed into a cavity of the shaft body through a wrench, the set screw in the shaft core is screwed tightly, the push rod is pushed to move axially along a positioning pin hole of the shaft core, a hydraulic oil medium in the cavity flows, a thin-wall smooth hole in the shaft body generates uniform elastic deformation under the action of pressure and expands tightly, and high-precision clamping on hub hole walls of gears, slotting cutters, gear shaving cutters and hobbing cutter hubs is achieved. By adopting the structure and the method, the clearance between the mandrel and the hub hole walls of the parts is eliminated, and the machining and detection precision of the parts such as the gears, the slotting cutters, the gear shaving cutters and the hobbing cutters is improved.

Description

technical field [0001] The invention relates to the field of processing and testing of gears, gear shaping cutters, shaving cutters and hobs, in particular to a high-precision hydraulic expansion mandrel used for precise clamping of parts to be processed in manufacturing and testing. Background technique [0002] Mandrels are commonly used connectors for gears, gear shaping cutters, shaving cutters, and hob processing and inspection. They are divided into ordinary mandrels, taper mandrels, mechanical expansion mandrels, and hydraulic expansion mandrels. Ordinary mandrels, taper mandrels, and mechanical expansion mandrels have low positioning and clamping accuracy, making it difficult to guarantee processing and testing accuracy. The working surface of the hydraulic expansion mandrel is continuously closed, and the hydraulic pressure is applied by manual or other automatic tools, and the elastic deformation of the elastic parts is used to expand and tighten the inner holes of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23F23/06B23B31/40
CPCB23B31/40B23F23/06
Inventor 王洪祥王储
Owner HARBIN INST OF TECH
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