A kind of pitch-row comparing measuring apparatus
The present invention relates to distance between borehole and measure Instrument technology field, especially relate to a kind of pitch-row comparing measuring apparatus of the distance between borehole measurement of the axial workpiece pin-and-hole of axis parallel, flat circle post holes.
At present in mechanical processing industry and manufacturing, for the pin-and-hole of axial workpiece, flat circle post holes pitch of holes from measurement be typically with the methods such as special hole position gauge, three-dimensional coordinates measurement, vernier caliper measurement and measure.Special hole position gauge therein can only qualitative discrimination, it is impossible to reading differentiates, being processed aperture size by part affects, and is difficult to accurately judge that whether workpiece is qualified, it is possible to be mistaken for by certified products defective, it is also possible to defective work is judged to qualified outflow.Although three-coordinate measuring method can accurately judge, but testing cost is high, is not suitable for a large amount of detection.Vernier caliper measurement method belongs to indirect measurement, namely measures the farthest and minimum distance between holes with survey foot in slide calliper rule and outer survey foot first respectively, then is added two measured values divided by 2, and obtained value of calculation is holes centre distance；Or, first with the maximum distance surveyed in slide calliper rule between foot measurement holes, then this measured value is deducted the half of tested holes actual measurement aperture sum；Or, first with the minimum distance surveyed outside slide calliper rule between foot measurement holes, then this measured value being added that tested holes surveys the half of aperture sum, obtained value of calculation is holes centre distance.Owing to vernier caliper measurement method needs reading repeatedly, and this reading is inaccurate due to error, and the reading result measured by different measuring personnel is the same not to the utmost, often occurs that result of determination is inconsistent；Adding measured value for indirectly measuring, final measured value is value of calculation, very not directly perceived, it is easy to occur calculating mistake.Therefore, existing various pitch-rows measure inspection method cause measuring inefficient, result of determination is unreliable, be also not suitable for hole in piece part from a large amount of entirely examine use.
Summary of the invention
The technical problem to be solved in the present invention is: for prior art Problems existing, it is provided that a kind of pitch-row comparing measuring apparatus, from tolerance, measured hole can be carried out accurate reading differentiation, improve result of determination reliability, also can carry out mass detection, promote detection efficiency.
The technical problem to be solved in the present invention realizes by the following technical solutions: a kind of pitch-row comparing measuring apparatus, including pitch-row tolerance reading plotter, adjustable two positioners of relative distance and positioning trimming device, described pitch-row tolerance reading plotter is connected fixing with fixing seat, one of them positioner is fixing with positioning trimming device to be connected, and another positioner and positioning trimming device are all movably connected on fixing seat；During measurement, two positioners fixing measured piece, described positioning trimming device is shown by pitch-row tolerance reading plotter relative to the rectilinear motion distance of fixing seat.
Further, described pitch-row tolerance reading plotter is dial gauge, and during measurement, the gauge head of described dial gauge directly contacts with positioning trimming device.
Further, described dial gauge is connected fixing by dial indicator holder with fixing seat, is flexibly connected with fixing seat bottom described dial indicator holder, and dial indicator holder top grip is connected fixing with the table handle of dial gauge.
Further, each described positioner includes a location key seat and an alignment pin, described alignment pin is mutually perpendicular to location key seat and is flexibly connected, one of them location key seat is fixing with positioning trimming device to be connected, and another location key seat is installed in fixing seat draw-in groove and relative to fixing seat rectilinear motion.
Further, described positioning trimming device is made up of stem stem, rocker piece and stage clip, and described stem stem runs through rocker piece and fixing with rocker piece is connected, and described rocker piece is arranged in the chute on fixing seat and is controlled its activity displacement by stage clip.
Further, the described stage clip in positioning trimming device is arranged in the counterbore of fixing seat end, and is flexibly connected, with fixing seat composition screw thread, the elastic force adjusting stage clip by screw plug.
Further, run through stem stem by steady pin between described stem stem and rocker piece and rocker piece is connected fixing.
Compared with prior art, the invention has the beneficial effects as follows: between adjustable for the standard component location and installation consistent with the pitch-row on measured workpiece to relative distance on measuring instrument two positioners, adjust positioning trimming device, and according to standard component actual size calibration hole from tolerance reading plotter zero-bit, as measured workpiece nominal size position.After adjustment calibration completes, take off standard component, change measured workpiece and can compare measurement, the tolerance value that the difference of measured value and zero-bit is on workpiece pitch-row size, this tolerance value is directly intuitively shown by pitch-row tolerance reading plotter, convenient reading, is not affected by processing dimension, therefore easy to operate, reliable, certainty of measurement is high；And may insure that the measurement numerical stability when high-volume is measured, it is greatly improved measurement efficiency, advantageously reduces testing cost.
Accompanying drawing explanation
Fig. 1 is the front view of a kind of pitch-row comparing measuring apparatus of the present invention.
Fig. 2 is the top view of a kind of pitch-row comparing measuring apparatus of the present invention.
Fig. 3 is the right view of a kind of pitch-row comparing measuring apparatus of the present invention.
Labelling in figure: 1-dial gauge, 2-dial indicator holder, 3-the first screw, 4-location key seat, 5-alignment pin, 6-stem stem, 7-steady pin, 8-rocker piece, 9-fixes seat, 10-the second screw, 11-stage clip, 12-screw plug, 13-chute, 14-the 3rd screw.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with the drawings and specific embodiments, the present invention is described in detail.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
A kind of pitch-row comparing measuring apparatus as shown in Figure 1, Figure 2, Figure 3 shows, mainly include dial gauge 1, location key seat 4 and be secured to alignment pin 5, stem stem 6 and the rocker piece 8 and the stage clip 11 that connect, dial gauge 1 therein corrects the pitch-row tolerance reading with measured workpiece for the zeroing of measuring instrument, this dial gauge 1 is connected fixing by dial indicator holder 2 with fixing seat 9, the top grip of described dial indicator holder 2 is connected fixing with the table handle of dial gauge 1, then utilizes two the second screws 10 to form the removable screw thread filled with fixing seat 9 and be flexibly connected and fix bottom it.Described alignment pin 5 is arranged in location key seat 4 hole and is mutually perpendicular to location key seat 4, by the first screw 3 tightening between alignment pin 5 and location key seat 4.This measuring instrument includes two positioners being made up of 5, location key seat 4 of an alignment pin and first screw 3 respectively altogether, the location key seat 4 in a positioner of end that keeps left is arranged in the long straight line draw-in groove on fixing seat 9 and can be for linear motion relative to fixing seat 9, when needs position, it is possible to adopt the 3rd screw 14 stationary positioned key seat 4.Described stem stem 6, rocker piece 8 and stage clip 11 collectively constitute a positioning trimming device, stem stem 6 therein is arranged in the through hole of fixing seat 9 and is slidably matched with fixing seat 9 composition, simultaneously, stem stem 6 is run through rocker piece 8 and is connected with being fixed by cylindrical steady pin 7 between rocker piece 8, and described steady pin 7 runs through stem stem 6 and rocker piece 8.Described rocker piece 8 is arranged in the chute 13 on fixing seat 9 and can move in chute 13 along stem stem 6 axis direction, and its activity displacement is controlled to reset by stage clip 11.Owing to pitch-row tolerance value when reality is measured is generally less than 1 millimeter, therefore, the lateral length of chute 13 is unsuitable excessive, generally big than the lateral length of rocker piece 82 millimeters.
The location key seat 4 kept right on this measuring instrument in a positioner of end is arranged in the draw-in groove on rocker piece 8, and by the 3rd screw 14 tightening, as shown in Figure 2.Owing to the location key seat 4 at two ends left and right on measuring instrument all can relative to fixing seat 9 linear slide, and the sliding scale of the location key seat 4 of left end is more than the sliding scale of the location key seat 4 of right-hand member, therefore, the relative distance being arranged between on location key seat 4 two alignment pins 5 can also regulate, to adapt to the measurement needs of different pore size and pitch-row workpiece.The location key seat 4 of measuring instrument right-hand member is fixing connection with rocker piece 8, and therefore its sliding scale, direction all keep synchronization consistent with the sliding scale of rocker piece 8, direction, and rocker piece 8 passes through the elastic reset of stage clip 11 in measuring instrument work process.Described stage clip 11 is arranged in the counterbore of fixing seat 9 end, and forms screw thread by screw plug 12 with fixing seat 9 and be flexibly connected the elastic force adjusting stage clip 11.In order to make the relative distance between two alignment pins 5 regulate stable, reliable, must assure that the slip of rocker piece 8 keeps concordance on the whole, for this, two stage clips 11 can be set, and it is symmetrically distributed in stem stem 6 both sides with the central axis of stem stem 6 for axis of symmetry, these two stage clips 11 press against rocker piece 8 two ends all the time, and its elastic force adjusts by screw plug 12.Such structure can so that the rocker piece 8 two ends active force that is subject to stage clip 11 be of substantially equal, thus ensureing rocker piece 8 not reason two ends unbalance stress and producing deflection, guarantee that its glide direction remains consistent, therefore, may insure that the relative distance between two alignment pins 5 is stable, improve the accuracy of testing result, reliability.
The measuring instrument operation principle of the present invention is as follows: before measuring, first, selects the alignment pin 5 of corresponding external diameter according to the pore size of tested part and is respectively mounted in two location key seats 4, utilizing the first screw 3 tightening.Then, one of them location key seat 4 is installed in the straight line draw-in groove of fixing seat 9, another location key seat 4 is fixed in the draw-in groove at rocker piece 8 top with the 3rd screw 14, pitch-row according to tested part moves and adjusts the relative distance between two alignment pins 5 in the position of the location key seat 4 of measuring instrument left end, when making between workpiece location and installation to two alignment pin 5, rocker piece 8 is in the centre position of chute 13, and namely the gap on rocker piece 8 both sides is essentially identical.After meeting this condition, then by the location key seat 4 of measuring instrument left end with the 3rd screw 14 tightening.During measurement, the first just center to stem stem 6 by the gauge head center of dial gauge 1, and directly contact with its end face；Again by between the standard component location and installation consistent with workpiece pore size and pitch-row length to two alignment pin 5, adjust dial gauge 1 clip position and rotate dial plate, and the scale value zero-bit according to standard component actual size calibration dial gauge 1, as workpiece nominal size position.Dial gauge 1 takes off standard component after having calibrated, and changes measured workpiece, and owing to stage clip 11 has elasticity, therefore, the pointer beat of the mobile drive dial gauge 1 of rocker piece 8 and stem stem 6, the difference of gained measured value and zero-bit is the deviation value of measured workpiece size.When clockwise direction in zero-bit of the pointer of dial gauge 1, deviation value is negative value；When counter clockwise direction in zero-bit of the pointer of dial gauge 1, deviation value be on the occasion of.
Two described location key seats 4 are the adjustment parts of measuring instrument, and its relative distance is adjustable.It is pointed out that the location key seat 4 of the end that keeps left is except can between the long straight line draw-in groove on fixing seat 9 except linear slide, it is also possible to reverse 180 ° are arranged in this draw-in groove, and by the 3rd screw 14 tightening；Similarly, keeping right the location key seat 4 of end can also in reverse 180 ° of draw-in groove being arranged on rocker piece 8, and by the 3rd screw 14 tightening, so can expand the relative distance between two alignment pins 5 further, so that measuring instrument adapts to larger range of tested part pitch-row.Described alignment pin 5 is the renewal part of measuring instrument, tested part according to different pore size is equipped with, the diameter of alignment pin 5 is replaceable, therefore, by location key seat 4, the adjustment of both alignment pins 5 or change and can meet the measurement needs of different pore size and pitch-row workpiece, and the distance between borehole of axle class pin-and-hole that two centerline holes are parallel to each other, flat circle post holes can be measured quickly and easily.Due to alignment pin 5 and measured piece elasticity intimate contact location, it is possible to get rid of clamping interference or the clamping gap impact on measured value that Dimension Measurement deviation causes, it is ensured that accurate positioning and testing result are reliable.
To sum up, measured workpiece is carried out plane positioning by the two of axis parallel alignment pins 5 by the measuring instrument of the present invention, is driven the pointer beat of dial gauge 1 by the elastic displacement of rocker piece 8 so that it is indicating value change, and demonstrates corresponding deviation value.Therefore, by adopting the standard component i.e. available present invention to compare measurement, not by the impact of measured workpiece processing dimension, not only convenient and reliable operation, detection efficiency are high, and it is high to measure numerical stability, precision, data intuitive display, it is simple to grasp.By changing various sizes of alignment pin 5 and the relative position adjusted between location key seat 4, can measure various axle class pin-and-hole, flat circle post holes pitch of holes from.If increasing other auxiliary accessories, it may also be used for measured hole, to the distance between face, is a kind of broad-spectrum universal pitch-row comparing measuring apparatus, both can use in work pieces process, it is also possible in the finish turn inspection of workpiece.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, it is noted that all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.