Workpiece loading device and machining device for machining tiny deep holes

A loading device, deep hole technology, applied in metal processing equipment, manufacturing tools, boring/drilling, etc., can solve the problems of affecting processing efficiency and processing accuracy, limited vibration drilling efficiency, irregularity of workpieces to be drilled, etc. , to improve the processing quality, improve the life of the drill bit, and achieve the effect of good drilling effect

Inactive Publication Date: 2014-02-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When using this kind of intelligent tool for processing, at the same time as traditional processing, only rely on the vibration of the cutting surface of the tool, the vibration form applied to the workpiece to be drilled is single, and the efficiency of vibration drilling is limited
In addition, when the tool applies torsional vibration to the workpiece to be drilled, the workpiece to be drilled will generate irregular and uncontrollable vibrations, which will affect the processing efficiency and precision

Method used

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  • Workpiece loading device and machining device for machining tiny deep holes
  • Workpiece loading device and machining device for machining tiny deep holes
  • Workpiece loading device and machining device for machining tiny deep holes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 , 2 As shown, the workpiece loading device for small deep hole processing includes a base 83, an upper cover 81 for carrying the workpiece 9 to be drilled, and a protective shell 82 connecting the base 83 and the upper cover 81; the base 83 and the upper cover 81 , the protective shell 82 is coaxial, and there is a torsional vibration generating mechanism in the protective shell 82. The torsional vibration generating mechanism includes a torsional driver 85 that generates torsional vibration and an excitation device that provides an excitation signal for the torsional vibration driver; the torsional driver 85 produces torsional vibration by smart materials . Common smart materials include piezoelectric fibers, magnetostrictive materials, electrostrictive materials, shape memory aggregates, piezoelectric ceramic materials and other materials that can change the physical properties of materials in response to external signals.

[0036] Such as image 3...

Embodiment 2

[0045] Such as Figure 8 As shown, the small deep hole processing device includes a drilling machine 1, a main shaft 2, a drill bit clamp 3 fixed with the main shaft 2, a drill bit 7, an intelligent material that drives the bit 7 torsionally vibrate, and the above-mentioned workpiece loading device 8, the drill bit 7 and the workpiece loading The device 8 vibrates in reverse torsion.

[0046] Such as Figure 9 As shown, the structure that limits the torsional vibration of the driving drill bit 7 is as follows: the smart material is a plurality of torsional vibration sheets 61, the torsional vibration sheets 61 are evenly distributed on the side of the torsional actuation base 62, and the torsional actuation base 62 is fixed to the drill bit holder 3 , The slip ring 5 for applying a drive signal to the torsional vibrating sheet 61 is provided on the drill holder 3 .

[0047] The torsional actuator base 61 is in the shape of a regular prism, and the torsional vibrating sheet 6...

Embodiment 3

[0050] The difference between this embodiment and Embodiment 2 is that in order to further improve the processing efficiency and precision, the drill bit 7 is also made to produce axial high-frequency micro-vibration while torsional vibration, and the structure that produces axial high-frequency micro-vibration As follows: the drill bit 7 and the clip 3 are fixedly connected to the piezoelectric stack actuator 4 that generates axial vibration. Piezoelectric ceramics apply excitation signals, such as Figure 10 shown. All the other structures are the same as in Example 2.

[0051] Under the combined action of the axial high-frequency micro-amplitude vibration and the circumferential torsional vibration, the drill bit 7 generates combined axial and circumferential vibrations to complete the small deep hole processing of the workpiece 9 to be drilled, the processing efficiency is improved, and the processing accuracy is improved. improve.

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PUM

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Abstract

A workpiece loading device for machining tiny deep holes comprises a base, an upper cover and a protection shell, wherein the upper cover is used for bearing a workpiece to be drilled, and the protection shell is connected with the base and the upper cover. The base, the upper cover and the protection shell are coaxially arranged. A torsional vibration generating mechanism is arranged inside the protection shell and comprises a torsional actuator for generating torsional vibration and an exciting device for providing an exciting signal for the torsional vibration actuator. The torsional actuator generates the torsional vibration through intelligent materials. The machining device for machining the tiny holes comprises a drilling machine, a main shaft, a drill bit clamp, a drill bit, an intelligent material for driving the drill bit to be torsionally vibrated and a workpiece loading device, wherein the drill bit clamp is fixedly connected with the main shaft, and the drill bit and the workpiece loading device are reversely and torsionally vibrated. The workpiece loading device and the machining device have the advantages that the tiny hole machining efficiency and the machining precision can be improved.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a workpiece loading device and a processing device for small deep hole processing. technical background [0002] With the development of the machinery industry, the requirements for the processing quality of mechanical parts are getting higher and higher. When ordinary drilling is used for small deep hole processing, the drill used is small in diameter and poor in rigidity. When there are hard points in the center, excessive or uneven force when feeding, chip blocking, unstable drill bit angular displacement, and random and uncontrollable excitation frequency, the torque will increase rapidly, forming a strong force in the process of machining. Due to torsional vibration, the drill bit will be twisted and deformed, and when the deformation reaches a certain level, the drill bit will be broken; when drilling a small deep hole, due to the small and deep hole diameter, the tool ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B41/00
CPCB23B41/00
Inventor 魏燕定杨依领娄军强武敏谢锋然赵晓伟林晨阳
Owner ZHEJIANG UNIV
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