CN101829890B - Reaming and boring method capable of solving concentric problem of multi-section shaft holes - Google Patents

Abstract

The invention relates to a reaming and boring method capable of solving the concentric problem of multi-section shaft holes. The method comprises the following steps of: 1, preparing a roughing reamer, wherein the reamer bar is provided with three groups of reamers; 2, roughly reaming, namely, making the front and rear reamers cut into an object and then allowing the middle reamer to enter the object after the front and rear holes are reamed so as to find the concentric position under the rigidity action of the reamer bar per se; 3, preparing a centering boring cutter, wherein the front and rear sections are positioning polish rods; the middle section is a group of blades where two to six blades are arranged symmetrically; and the length of each blade is 5 to 8 mm; and 4, reaming a center hole by using the centering boring cutter, namely, allowing the front and rear sections of polish rods to enter the roughly reamed front and rear holes of a shell and then reaming and boring the holes by using the middle centering boring blades, wherein the centering boring blades are short and have small areas contacting with the center hole, so that the capacity for centering the holes concentrically is high. The method has the advantages of meeting assembling requirement and reducing labor intensity of staff, along with greatest improvement on the concentricity of the main shaft holes of the shell after the process.

Description

A kind of reaming and boring method that solves more piece axis hole concentric problem

Technical field:

The present invention relates to machining, can proofread and correct the concentric of more piece axis hole with fraising well, is the instrument with simple economy, reaches more piece (more than three joints) the concentric a kind of processing method of axis hole.

Background technology:

The ream of more piece axis hole all is that requirement three joints or more piece blade are cut the blank entity simultaneously for a long time, and the hole hinge is logical.For example industrial sewing machine casing spindle hole generally has three joints (or more than three joints), and it is logical to cut simultaneously the axis hole hinge with the joint of three on same axle reamer, and there are a lot of problems in this ream mode:

1, because material is inhomogeneous, when reamer cut in the hole, because the contact area of reamer blade and axis hole is bigger, so be subjected to radial load big, reamer can be easy to be pushed to the soft side of material and cause decentraction;

2, three joint reamers can make the radial rigidity of knife bar weaken and the correcting action of the aperture location that weakens owing to the manufacturing reason of blade chip space.

3, ream is stressed big simultaneously with upper shaft hole for three joints, and labor strength is big.

Summary of the invention:

In order to overcome the porous decentraction problem of processing sewing machine main shaft in enormous quantities, the invention provides new processing technology and the specific purpose tool of a cover, change the reamer pitch, increase and hold up boring cutter.This technology and specific purpose tool have not only solved the porous concentric problem of machine spindle, and alleviate working strength of workers.

It is as follows that the present invention solves the technical scheme steps that its problem adopts:

One, prepare roughing reamer, three groups of reamers are housed on the knife bar, respectively corresponding with the aperture of design, behind the hole steric retardation of the position of middle reamer than the centre;

Two, thick hinge, two joint reamers are cut earlier entity before and after allowing, after two holes are hinged before and after treating, a middle joint reamer enters again, reamer is after the two groups of reamers in front and back find theoretical center in the middle of making, and middle reamer carries out ream again, can change the cutting data of revolution intermediate blades according to the speed of feed, thereby reduce the suffered Radial resistant force of intermediate blades, can under the effect of knife bar self rigidity, find concentric position;

Three, prepare to hold up boring cutter, front and back two joints are the location polished rod, and the centre is one group of blade, has 2～6, is arranged symmetrically with, and blade lengths is 5～8mm, and what is called is held up boring, are exactly under the condition of the front and back of interstitial hole with the lead support, the boring interstitial hole;

Four, with holding up boring cutter hinge mesopore, hold up boring cutter before and after joint be polished rod, be introduced into the slightly casing front and rear gaps of hinge, hold up the boring cutter sheet to begin boring in the middle of then and ream, hold up the boring cutter leaf length shorter and the mesopore contact area is little, the concentric ability of trimming hole is strong, mainly plays the boring effect; The symmetry blade can guarantee pore size, in the process only in joint boring cutter work, further revise the concentricity of interstitial hole and front and rear gaps;

Five, prepare bottoming reamer, its structure is identical with roughing reamer, and three groups of reamers are housed on the knife bar, and respectively corresponding with the aperture of design, the position of middle reamer lags behind than middle hole site;

Six, carrying out ream with bottoming reamer, is that front and back two joints are cut earlier forward and backward hole equally, and with intermediate blades incision casing interstitial hole, principle is with just cutting with scissors again.

The invention has the beneficial effects as follows through this processing back cabinet spindle hole concentricity to obtain maximum the improvement that can satisfy matching requirements, staff labor intensity is reduced.

Description of drawings:

Fig. 1 slightly cuts with scissors the spindle hole schematic diagram

Fig. 2 holds up boring hinge spindle hole schematic diagram

Among the figure: 1, roughing reamer deutomerite blade, 2, save blade in the roughing reamer, 3, roughing reamer prosthomere blade, 4, hold up lead behind the boring cutter, 5, hold up the boring cutter sheet, 6, hold up lead before the boring cutter.

Specific embodiments

Below in conjunction with accompanying drawing and with industrial sewing casing upper shaft hole ream is that the present invention is further described for embodiment:

One, in Fig. 1, prepare roughing reamer, three groups of reamers are housed on the knife bar, they are joint blade 2 and roughing reamer prosthomere blades 3 in roughing reamer deutomerite blade 1, the roughing reamer, and are corresponding with the aperture of design respectively, behind the hole steric retardation of the position of middle reamer than the centre;

Two, in Fig. 1, thick hinge, two joint reamers are cut earlier entity before and after allowing, after treating that the front Kong Erkong of main shaft metapore and main shaft is hinged, a middle joint reamer enters the main shaft mesopore again, makes and saves blade 2 in the roughing reamer after the two groups of reamers in front and back find theoretical center, middle reamer carries out ream again, can change the cutting data of revolution intermediate blades according to the speed of feed, thereby reduce the suffered Radial resistant force of intermediate blades, can under the effect of knife bar self rigidity, find concentric position;

Three, in Fig. 2, boring cutter is held up in preparation, before and after two joints namely hold up behind the boring cutter lead 4 and hold up boring cutter front guide post 6 for the location polished rod, the centre is that one group of blade is namely held up boring blade 5, has 4, is arranged symmetrically with, blade lengths is 6mm, what is called is held up boring, is exactly under the condition of the front and back of interstitial hole with the lead support, the boring interstitial hole;

Four, in Fig. 2,, hold up boring cutter front and back joint to be polished rod with holding up boring cutter hinge mesopore, be introduced into the slightly casing front and rear gaps of hinge, the middle then boring cutter sheet 5 of holding up begins the borings fraising, holds up boring cutter sheet 5 length shorter, little with the mesopore contact area, the concentric ability of trimming hole is strong, mainly plays the boring effect; The symmetry blade can guarantee pore size, in the process only in joint boring cutter work, further revise the concentricity of interstitial hole and front and rear gaps;

Five, prepare bottoming reamer, its structure is identical with roughing reamer, and three groups of reamers are housed on the knife bar, and respectively corresponding with the aperture of design, the position of middle reamer lags behind than middle hole site;

Six, carrying out ream with bottoming reamer, is that front and back two joints are cut earlier forward and backward hole equally, and with intermediate blades incision casing interstitial hole, principle is with just cutting with scissors again.

Claims (1)

1. reaming and boring method that solves more piece axis hole concentric problem is characterized in that step is as follows:

One, prepare roughing reamer, three groups of reamers are housed on the knife bar, respectively corresponding with the aperture of design, behind the hole steric retardation of the position of middle reamer than the centre;

Two, thick hinge, two joint reamers are cut earlier entity before and after allowing, after two holes are hinged before and after treating, a middle joint reamer enters again, reamer is after the two groups of reamers in front and back find theoretical center in the middle of making, and middle reamer carries out ream again, can change the cutting data of revolution intermediate blades according to the speed of feed, thereby reduce the suffered Radial resistant force of intermediate blades, can under the effect of knife bar self rigidity, find concentric position;

Three, prepare to hold up boring cutter, front and back two joints are the location polished rod, and the centre is one group of blade, and the 2-6 sheet is arranged, and is arranged symmetrically with, and blade lengths is 5-8mm, and what is called is held up boring, are exactly under the condition of the front and back of interstitial hole with the lead support, the boring interstitial hole;

Four, with holding up boring cutter hinge mesopore, joint is polished rod before and after holding up boring cutter, be introduced into the slightly casing front and rear gaps of hinge, hold up boring blade to begin the boring fraising then, hold up boring blade Length Ratio reamer short, symmetrical blades can guarantee pore size, in the process only in joint boring cutter work, further revise the concentricity of interstitial hole and front and rear gaps;

Five, prepare bottoming reamer, its structure is identical with roughing reamer, and three groups of reamers are housed on the knife bar, and respectively corresponding with the aperture of design, the position of middle reamer lags behind than middle hole site;

Six, carrying out ream with bottoming reamer, is that front and back two joint bottoming reamers are cut earlier forward and backward hole equally, again with intermediate blades incision casing interstitial hole.

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