CN200968844Y - Apparatus used for measuring odd number groove screwtap medium diameter - Google Patents

Abstract

The utility model relates to a device for measuring odd number fluted tap pitch diameter, consisting of a horizontal distancer. The floating workbench of the horizontal distancer is slidingly cooperated with the workbench, both ends of the floating workbench is fixed by two baffles, a thimble rack is arranged beyond the workbench. The utility model is characterized in that two baffles are provide with nicks on the top, the edge of floating workbench is positioned at the nicks, and the baffles are fixed on the workbench by bolts. The utility model with the applying of regular horizontal distancer could not only measuring the pitch diameter of varies odd number fluted taps, but also has advantages of accurate results, rapidly measuring and convenient operation.

Description

Be used for measuring the device in tap with odd slots footpath

Technical field

The utility model relates to a kind of surveying instrument, is specifically related to a kind of measurement mechanism that is used for measuring the tap with odd slots footpath.

Background technology

Therefore the pitch diameter of thread often needs to measure footpath in the screw tap, to guarantee the thread quality and the precision of product to be processed as the important parameter of screw tap product in commercial production.Usually measure and directly adopt horizontal length measuring machine in the cylindrical thread screw tap.Horizontal length measuring machine is a kind of length-measuring instrument that is combined by precision optical machinery, optical system and electric part, is mainly used in the measurement, cylindrical external thread of measurement, hole measuring, the cylindrical component of measurement, the bulb of parallel plane part that the footpath is measured, the footpath is measured etc. in the internal thread.It is measured, and the footpath measuring method is in the cylindrical external thread: referring to Fig. 5, two thimbles 3 of tested screw tap 2 usefulness horizontal length measuring machines are fixed on the worktable, with surveying cap 43 metering pins 1 are abutted against in the groove on the form of thread,, calculate the pitch diameter of thread with formula again by digital display case sense data.The advantage of horizontal metroscope is the measuring accuracy height, is to measure the gauging instrument that the footpath is the most frequently used in the cylindrical external thread, precision is higher at present.Because each land of tap with odd slots is pairing to be groove (ginseng Fig. 6), adopt said method metering pin can not be abutted against in the groove on the form of thread of screw tap, with horizontal length measuring machine footpath in the energy measurement tap with odd slots not.

Measure the method in footpath in the tap with odd slots at present, have following two kinds: 1. with three ditch screw tap somascopes measure footpath in the tap with odd slots (referring to Heilongjiang Province's standard metering management board and Harbin Institute of Technology write " the length metering handbook), this method is a comparative measurement method, promptly use with tested tap with odd slots in the footpath, the identical size with the thread form angle of pitch is also adjusted this measurement mechanism by footpath in the reality of standard screw thread gauge of calibrating, and then tap with odd slots compared measurement, measuring accuracy is low, is applicable in enormous quantities, the low tap with odd slots of accuracy requirement is measured; 2. utilizing thimble, measurement cutter and the combination of optics index sleeve to measure footpath in the tap with odd slots on universal tool-measuring microscope (publish referring to China Machine Press, " the universal tool-measuring microscope modus operandi " that Xu Xiaoen writes), in measuring process, screw tap workpiece of every measurement, in data handling procedure, must consider screw tap rotation θ angle, the compensation of the groove error of division and the data such as compensation of helix angle, therefore this measuring method is loaded down with trivial details, complicated, efficient is low, and the tap with odd slots that is only applicable to short run is measured.Therefore how measuring the middle footpath of tap with odd slots quickly and accurately, is a current problem that needs solution.

Summary of the invention

The purpose of this utility model provides a kind of device that is used for measuring the tap with odd slots footpath, adopts conventional horizontal length measuring machine, can measure footpath in the tap with odd slots of all size, and have measurement result accurate, measures fast, the simple advantage of method of operating.

The purpose of this utility model is achieved like this:

Comprise horizontal length measuring machine, the floating work bench and the worktable of horizontal length measuring machine are slidingly matched, two ends of floating work bench are fixed with baffle plate, the thimble support is positioned at the top of worktable, the top of two baffle plates is equipped with breach, the breach that the edge of floating work bench is arranged in, baffle plate is screwed on worktable.

Adopted such scheme, when footpath in the tap with odd slots was measured, the left and right end margin of floating work bench laid respectively in the breach of baffle plate, screws with the adjustment screw, and floating work bench can not left and rightly be floated and rotation.The thimble support is by being bolted to the floating work bench top, and two thimbles clamp tap with odd slots.Combine with the single needle mensuration with horizontal length measuring machine during measurement, do not need standard screw thread gauge just can measure, can measure footpath in the tap with odd slots with a metering pin to footpath in the tap with odd slots, therefore, measuring method is simple, and can be used for tap with odd slots in enormous quantities and measure, and the accuracy of detection height.

The utility model can be used for measuring the middle footpath of the tap with odd slots of all size.

The utility model cost is low, high efficiency, and measuring in the tap with odd slots footpath only needs 0.5 minute, and uncertainty of measurement is 0.0024mm, can satisfy the measurement to all size, in enormous quantities, tap with odd slots that accuracy requirement is high.

The utility model can be used for the horizontal length measuring machine of various models, all can reach effect described in the utility model.

The utility model is described in further detail below in conjunction with the drawings and the specific embodiments.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A portion cutaway view Amplified image of Fig. 1;

Fig. 3 is that the B of Fig. 1 is to view;

Fig. 4 is for measuring the synoptic diagram in footpath in the tap with odd slots;

Fig. 5 is a footpath instrumentation plan in the cylindrical external thread;

Fig. 6 is the structure diagram of tap with odd slots.

In the accompanying drawing: 1 is metering pin, and 2 is tap with odd slots, and 3 is thimble, and 4 for surveying cap, and 5 is master bar, and 6 is baffle plate, 7 for adjusting screw, and 8 is floating work bench, and 9 is the thimble support, and 10 is worktable, and 11 is screw, 12 is base, and 13 for surveying seat, and 14 is the digital display case, and 15 is measuring staff, and 16 is breach.

Embodiment

With reference to Fig. 1, survey seat 13 in the horizontal length measuring machine and be slidingly fitted on the guide rail of base 12, and be positioned at any position on the guide rail by revolving hand.Measuring staff 15 clearance fit are in surveying seat 13, and the grating chi is fixed in the measuring staff 15, and the stroke value of measuring staff axially-movable transfers signals in the digital display case 14 by the sensor-based system of grating chi, carry out electronic fine-grained, counting and show numerical value with charactron.Survey cap 4 usefulness bolt tightenings and cooperate the end that is installed in measuring staff 15, the bracket clamp that hangs metering pin is connected on the front end of measuring staff 15, and metering pin 1 is suspended on the place ahead of surveying cap by support.

Worktable 10 cooperations of horizontal length measuring machine are installed on the base 12, with revolving any position that hand is positioned at base, according to the method adjustment in the instrument operation instructions, make worktable can do 0～105mm lifting.Left and right two end faces at worktable 10 are fixed (referring to Fig. 2) with screw 11 and baffle plate 6 respectively, the top of baffle plate is provided with breach 16, described indentation, there is provided with screw, the screw of the breach on two baffle plate tops is two, perhaps the screw of the breach on one of them baffle plate top is two, and the screw of the breach on another baffle plate top is one.Floating work bench 8 is movably connected in the upper surface of worktable 10, and its relative worktable can be done moving horizontally of positive and negative 5mm, and rotates positive and negative 4 ° around table axis.The left and right end margin of floating work bench 8 lays respectively in the breach of baffle plate, between floating work bench edge and the baffle plate breach spacing distance that is not less than 3mm is arranged.4 or 3 adjust on the threaded hole that screw 7 is installed in baffle plate 6 breach and screw, and floating work bench can not left and rightly be floated and rotation.Thimble support 9 is by being bolted to floating work bench 8 tops, and two thimbles 3 that are provided with in opposite directions on the thimble support 9 are positioned on the same axial line, and two thimbles clamp tap with odd slots 2.

With reference to Fig. 1,3 and Fig. 4, the utility model is measured the process in footpath in the tap with odd slots:

Master bar is a right cylinder, and its two ends are respectively arranged with centre hole, and described centre hole matches with thimble on the horizontal metroscope.Master bar is made of high-quality tool steel, and quenching hardness is HRC56～62.The master bar surface roughness Ra is 0.1, and the right alignment of the relative centre hole of master bar cylindrical is 0.001, and cylindricity is 0.002, and the diameter of master bar is identified with the above gauge block of the fourth class.The effect of master bar is to determine the initial value of horizontal metroscope and determine to measure axis and measured axis normal.

Master bar 5 is placed on the thimble support and clamps with two thimbles.Metering pin 1 is suspended on the support that is connected to measuring staff, move and survey seat 13 and measuring staff 15, survey cap 4 is contacted with master bar 5, adjust four and adjust screw 7, look for " turning point " according to the method in the instrument operation instructions, make survey cap 4 parallel with master bar 5, because surveying cap 4 is mounted on the end face of measuring staff 15, and with measuring staff 15 motions, survey cap 4 and measuring staff 15 and inner grating chi composition slotted line, so when the axis normal of surveying cap 4 and master bar 5 explanation measurement axis X and master bar 5 when parallel, then measure the axis normal of axis X and master bar 5, it is vertical with measured axis Y promptly to measure axis X.Half determines initial value to get it according to the certified value Φ (being assumed to be Φ 20.003mm) of master bar 5 then, and promptly the numerical value that shows of digital display case 14 equals the master bar certified value

(being assumed to be 10.0015mm).

After instrument is adjusted, select metering pin 1 according to metering pin computing formula (1) earlier.

$d_0=\frac{\mathrm{<figure-callout\; id="2"\; label="p"\; filenames="Y20062011163700092.png,Y20062011163700102.png"\; state="\{\{state\}\}">p</figure-callout>}}{2\cos \mathrm{\&alpha;}/2}---\left(1\right)$

In the formula: d ₀For metering pin diameter P is the thread form angle for pitch α

Tap with odd slots is installed on the thimble support and clamps with two thimbles, a metering pin 1 of choosing is placed in the alveolus of tap with odd slots 2, mobile measuring staff 15, survey cap 4 is contacted with metering pin 1, rotate tap with odd slots 2, on digital display case 14, read maximal value N, calculate footpath in the screw tap by formula (2).

${\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="Y20062011163700092.png,Y20062011163700102.png"\; state="\{\{state\}\}">d</figure-callout>}}_2=2N-d_0(1+\frac{1}{\sin \mathrm{\&alpha;}/2})+\frac{\mathrm{<figure-callout\; id="2"\; label="p"\; filenames="Y20062011163700092.png,Y20062011163700102.png"\; state="\{\{state\}\}">p</figure-callout>}}{2}\mathrm{ctg}\frac{\mathrm{\&alpha;}}{2}---\left(2\right)$

In the formula: d ₂Be footpath in the tap with odd slots, N is the measured value that shows on the digital display case, d ₀Be the metering pin diameter, α is a tap with odd slots thread form angle, and P is a screw tap pitch.

In order to improve measuring accuracy, measure in several directions respectively, to eliminate the morpheme error of product, calculate mean value at last and be defined as footpath in this screw tap.

Claims (3)

1. one kind is used for measuring tap with odd slots device directly, comprise horizontal length measuring machine, the floating work bench and the worktable of horizontal length measuring machine are slidingly matched, two ends of floating work bench are fixed with baffle plate, the thimble support is positioned at the top of worktable, it is characterized in that: the top of two baffle plates is equipped with breach, the breach that the edge of floating work bench is arranged in, and baffle plate is screwed on worktable.

2. the device that is used for measuring the tap with odd slots footpath according to claim 1, it is characterized in that: the indentation, there on described baffle plate top is provided with screw.

3. the device that is used for measuring the tap with odd slots footpath according to claim 2, it is characterized in that: the screw of the breach on described two baffle plate tops is two, perhaps the screw of the breach on one of them baffle plate top is two, and the screw of the breach on another baffle plate top is one.

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