A precision indexing device and method for large shaft parts

A technology of shaft parts and indexing devices, which is applied in the field of processing and manufacturing, can solve the problems of positioning and alignment errors affecting indexing accuracy, increasing indexing torque, and affecting indexing accuracy, so as to achieve good indexing accuracy and eliminate indexing Influence of accuracy, effect of easy operation

Active Publication Date: 2016-11-30
CHONGQING GEARBOX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is to install the general-purpose indexing head and the top seat at both ends of the part, and the V-shaped support in the middle to operate the indexing head for indexing; specifically, the indexing head is fixed on the machine tool table, and the rotation of the indexing head drives the rotation of the part for indexing , the gravity of the parts increases the indexing torque, which seriously affects the indexing accuracy. It is very complicated to adjust the coaxial operation of the indexing device and the support device; the second is to install a special indexing tool with pin holes or polygons on the shaft end, and locate or Align polygons for indexing; it needs to manufacture special indexing tooling, tooling manufacturing errors and positioning alignment errors affect the indexing accuracy, and it is only suitable for indexing at one or several set angles, and has poor versatility; The third is to install the alignment block at the end of the shaft, and to perform indexing through polar coordinate alignment on the high-precision CNC machine tool
It requires the use of high-precision CNC machine tools, and the alignment requires repeated fine-tuning of the parts, which is cumbersome to operate

Method used

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  • A precision indexing device and method for large shaft parts
  • A precision indexing device and method for large shaft parts
  • A precision indexing device and method for large shaft parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 see figure 1 , figure 2 , image 3 , a precision indexing device for large shaft parts, including three equal-height V-shaped irons 2 for supporting shaft parts 1 and fixed on a working platform, and a general-purpose indexing plate 4 for indexing; Among them, two equal-height V-shaped irons 2 are respectively supported on two equal-diameter outer cylindrical sections of the shaft part 1, and the other equal-height V-shaped iron 2 is supported on the other end of the shaft part 1 whose diameter is smaller than the aforementioned two cylindrical sections. The tail section is provided with equal-thickness pads 8 on the V-shaped two support surfaces of the equal-height V-shaped iron 2, and the thickness of the equal-thickness pads 8 is equal to the radius difference between two unequal-diameter cylindrical sections; wherein, The indexing plate 4 is clamped and fixed on the outer circle of one end of the shaft part 1 by the four-jaw chuck 3, and by adjustin...

Embodiment 2

[0031] Example 2 , see figure 1 , figure 2 , image 3 , a precision indexing method for large shaft parts, comprising the following steps.

[0032] The first step includes the sub-steps of parts installation and alignment and index plate installation and alignment.

[0033]The parts installation and alignment are divided into steps, including first installing the large-scale shaft part 1 to be processed by milling on the working platform through three equal-height V-shaped irons 2, and the three equal-height V-shaped irons 2 Cooperate with the positioning groove of the milling machine table through the positioning key provided on it for positioning, and fix the V-shaped iron 2 with the milling machine table; wherein, two equal-height V-shaped irons 2 are supported on the two shaft parts 1 respectively. The outer cylindrical section of equal diameter, another equal height V-shaped iron 2 is supported on the other end tail section of the shaft part 1 whose diameter is sma...

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Abstract

The invention discloses a precision indexing device and a method for large shaft parts. The device comprises V-shaped iron used for fixing shaft parts and fixed on a working platform as well as a general indexing panel; the indexing panel is clamped and fixed on the external circle at one end of the shaft parts by a four-jaw chuck; the rotary table of the indexing panel is coaxial to the shaft parts; a dial indicator is arranged on the base of the indexing panel by using a magnetometer base; the working platform is fixedly connected with a proofreading block which is used for recording the initial position of the base of the indexing panel by using the dial indicator and proofreading the base of the indexing panel. The indexing method comprises the steps of installation and alignment of parts, installation and alignment of the indexing panel, recording of the initial position of the indexing panel, single rotation of the base of the dial panel and synchronous rotation and resetting along with the parts. The indexing device is simple in structure, high in indexing precision and strong in commonality; the indexing method is convenient to operate, and meanwhile, the influence of the weight of the shaft parts to the indexing precision is eliminated.

Description

technical field [0001] The invention relates to the technical field of processing and manufacturing, in particular to a precision indexing device and method in the circumferential direction of large shaft parts. Background technique [0002] To process splines, gears, keyways, etc. on large shaft parts, it is necessary to rotate the parts for indexing in the circumferential direction, and the accuracy of the indexing determines the machining accuracy. There are three main conventional indexing methods for large shaft parts. One is to install the general-purpose indexing head and the top seat at both ends of the part, and the V-shaped support in the middle to operate the indexing head for indexing; specifically, the indexing head is fixed on the machine tool table, and the rotation of the indexing head drives the rotation of the part for indexing , the gravity of the parts increases the indexing torque, which seriously affects the indexing accuracy. It is very complicated to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q16/06
CPCB23Q16/10B23Q17/2291
Inventor 姚世屈阙洪军谭小龙姚攀吴鑫
Owner CHONGQING GEARBOX
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