A kind of pitch-row comparing measuring apparatus
The utility model relates to distance between borehole surveying instrument technical field, especially relates to a kind of pitch-row comparing measuring apparatus that the distance between borehole of axial workpiece pin-and-hole, the plane cylindrical hole of axis parallel is measured.
At present in mechanical processing industry and manufacturing, for the pitch of holes of the pin-and-hole of axial workpiece, plane cylindrical hole from measurement normally adopt the methods such as special hole position cubing, three-dimensional coordinates measurement, vernier caliper measurement to measure.Special hole position cubing wherein can only qualitative discrimination, can not differentiate by reading, is subject to part processing aperture size impact, is difficult to accurately judge that whether workpiece is qualified, certified products may be mistaken for defectively, also unacceptable product may be judged to qualified outflow.Although three-coordinate measuring method can accurately judge, testing cost is high, is not suitable for a large amount of detections.Vernier caliper measurement method belongs to indirect measurement, first respectively with survey in slide calliper rule pin and outer survey pin measure between two holes farthest and minimum distance, then two measured values are added divided by 2, the calculated value obtaining is two hole centre distances; Or, first measure the maximum distance between two holes with surveying pin in slide calliper rule, then this measured value deducted to the half of tested two actual measurement aperture, hole sums; Or, first to survey pin outward with slide calliper rule and measure the minimum distance between two holes, then this measured value is added to the half of tested two actual measurement aperture, hole sums, the calculated value obtaining is two hole centre distances.Because vernier caliper measurement method needs reading repeatedly, and this reading is because error is inaccurate, and the measured reading result of different measuring personnel is the same not to the utmost, often occurs that result of determination is inconsistent; Add measured value for indirectly measuring, final measured value is calculated value, very not directly perceived, easily occurs calculating mistake.Therefore, existing various pitch-rows are measured inspection methods and are caused measuring that efficiency is lower, result of determination is unreliable, are also not suitable for a large amount of full inspection of hole in piece part distance to use.
Utility model content
The technical problems to be solved in the utility model is: the problem existing for prior art, a kind of pitch-row comparing measuring apparatus is provided, can carries out accurate reading differentiation apart from tolerance to measured hole, improve result of determination reliability, also can carry out mass detection, promote detection efficiency.
The technical problems to be solved in the utility model realizes by the following technical solutions: a kind of pitch-row comparing measuring apparatus, comprise pitch-row tolerance reading device, relative distance is adjustable two locating devices and positioning trimming device, described pitch-row tolerance reading device and holder are connected and fixed, one of them locating device is fixedly connected with positioning trimming device, and another locating device and positioning trimming device are all movably connected on holder; When measurement, fix measured piece by two locating devices, described positioning trimming device shows by pitch-row tolerance reading device with respect to the rectilinear motion distance of holder.
Further, described pitch-row tolerance reading device is dial gauge, and when measurement, the gauge head of described dial gauge directly contacts with positioning trimming device.
Further, described dial gauge is connected and fixed by dial indicator holder and holder, and described dial indicator holder bottom is flexibly connected with holder, and the table handle of dial indicator holder top holder and dial gauge is connected and fixed.
Further, locating device described in each comprises a location key seat and a register pin, described register pin and location key seat are mutually vertical and be flexibly connected, one of them location key seat is fixedly connected with positioning trimming device, and another location key seat is installed in holder draw-in groove and with respect to holder rectilinear motion.
Further, between described register pin and location key seat, become to be flexibly connected by the first set screws.
Further, described positioning trimming device is made up of stem stem, slider pad and stage clip, and described stem stem runs through slider pad and is fixedly connected with slider pad, and described slider pad is arranged in the chute on holder and by its activity displacement of stage clip control.
Further, the stage clip in described positioning trimming device is arranged in the counterbore of holder end, and is flexibly connected to adjust the elastic force of stage clip by screw plug and holder composition screw thread.
Further, the stage clip in described positioning trimming device arranges two, and is symmetrically distributed in stem stem both sides taking the central axis of stem stem as axis of symmetry.
Further, between described stem stem and slider pad, run through stem stem by fixed pin and slider pad is connected and fixed.
Compared with prior art, the beneficial effects of the utility model are: by and measured workpiece on the consistent standard component location and installation of pitch-row between two adjustable locating devices of relative distance on measuring instrument, adjust positioning trimming device, and according to standard component physical size calibration hole apart from tolerance reading device zero-bit, as measured workpiece nominal size position.After adjustment has been calibrated, take off standard component, change measured workpiece and can compare measurement, the difference of measured value and zero-bit is the tolerance value of pitch-row size on workpiece, this tolerance value is directly intuitively shown by pitch-row tolerance reading device, conveniently reads, and not affected by processing dimension, therefore easy to operate, reliable, measuring accuracy is high; And can guarantee the measurement numerical stability in the time of in enormous quantities measurement, and greatly promote measurement efficiency, be conducive to reduce testing cost.
Brief description of the drawings
Fig. 1 is the front view of a kind of pitch-row comparing measuring apparatus of the utility model.
Fig. 2 is the vertical view of a kind of pitch-row comparing measuring apparatus of the utility model.
Fig. 3 is the right view of a kind of pitch-row comparing measuring apparatus of the utility model.
Mark in figure: 1-dial gauge, 2-dial indicator holder, 3-the first screw, 4-location key seat, 5-register pin, 6-stem stem, 7-fixed pin, 8-slider pad, 9-holder, 10-the second screw, 11-stage clip, 12-screw plug, 13-chute, 14-the 3rd screw.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the drawings and specific embodiments, the utility model is elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
A kind of pitch-row comparing measuring apparatus as shown in Figure 1, Figure 2, Figure 3 shows, mainly comprise dial gauge 1, location key seat 4 and the register pin 5 being fixedly connected with it, stem stem 6 and slider pad 8 and stage clip 11, dial gauge 1 is wherein for the zeroing correction of measuring instrument and the pitch-row tolerance reading of measured workpiece, this dial gauge 1 is connected and fixed by dial indicator holder 2 and holder 9, the top holder of described dial indicator holder 2 and the table handle of dial gauge 1 are connected and fixed, and its bottom utilizes two the second screws 10 and holder 9 to form the removable screw thread filling and is flexibly connected and fixes.Described register pin 5 is arranged in location key seat 4 holes and is mutually vertical with location key seat 4, passes through the first screw 3 tightenings between register pin 5 and location key seat 4.This measuring instrument comprises that two respectively by a register pin 5, location key seat 4 and the locating device that the first screw 3 forms altogether, the location key seat 4 keeping left in a locating device of end is arranged in the long straight line draw-in groove on holder 9 and can be with respect to holder 9 moving linearly, in the time that needs are located, can adopt the 3rd screw 14 stationary positioned key seats 4.Described stem stem 6, slider pad 8 and a positioning trimming device of stage clip 11 common compositions, stem stem 6 is wherein arranged in the through hole of holder 9 and is slidably matched with holder 9 compositions, simultaneously, stem stem 6 run through slider pad 8 and and slider pad 8 between be fixedly connected with by columniform fixed pin 7, described fixed pin 7 runs through stem stem 6 and slider pad 8.Described slider pad 8 is arranged in the chute 13 on holder 9 and can in chute 13, moves along stem stem 6 axis directions, and its activity displacement is controlled reset by stage clip 11.Pitch-row tolerance value during due to actual measurement is generally less than 1 millimeter, and therefore, the lateral length of chute 13 is unsuitable excessive, than the lateral length of slider pad 8 large 2 millimeters conventionally.
The location key seat 4 of keeping right on this measuring instrument in a locating device of holding is arranged in the draw-in groove on slider pad 8, and by the 3rd screw 14 tightenings, as shown in Figure 2.Because the location key seat 4 at left and right two ends on measuring instrument all can be with respect to holder 9 linear slide, and the sliding scale of the location key seat 4 of left end is greater than the sliding scale of the location key seat 4 of right-hand member, therefore, the relative distance being arranged between two register pins 5 on location key seat 4 also can 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 to be fixedly connected with slider pad 8, and therefore its sliding scale, direction all keep synchronous consistent with sliding scale, the direction of slider pad 8, and slider pad 8 passes through the elastic reset of stage clip 11 in the measuring instrument course of work.Described stage clip 11 is arranged in the counterbore of holder 9 ends, and is formed screw thread and be flexibly connected to adjust the elastic force of stage clip 11 by screw plug 12 and holder 9.In order to make two relative distance modification stabilities between register pin 5, reliable, must ensure that the slip of slider pad 8 keeps consistency on the whole, for this reason, two stage clips 11 can be set, and be symmetrically distributed in stem stem 6 both sides taking the central axis of stem stem 6 as axis of symmetry, these two stage clips 11 press against slider pad 8 two ends all the time, and its elastic force is adjusted by screw plug 12.It is substantially equal that such structure can make slider pad 8 two ends be subject to the acting force of stage clip 11, thereby ensure not reason two ends unbalance stress and produce deflection of slider pad 8, guarantee that its glide direction remains consistent, therefore, can guarantee that two relative distances between register pin 5 are stable, improve accuracy, the reliability of testing result.
Measuring instrument principle of work of the present utility model is as follows: before measurement, first, select the register pin 5 of corresponding external diameter and be fit into respectively in two location key seats 4 according to the pore size of tested part, utilizing the first screw 3 tightenings.Then, one of them location key seat 4 is installed in the straight line draw-in groove of holder 9, another location key seat 4 use the 3rd screw 14 is fixed in the draw-in groove at slider pad 8 tops, move in the position of the location key seat 4 of measuring instrument left end and adjust the relative distance between two register pins 5 according to the pitch-row of tested part, while making between workpiece location and installation to two register pin 5, the centre position of slider pad 8 in chute 13, the gap on slider pad 8 both sides is basic identical.Meet after this condition, then by the 3rd screw 14 tightenings of the location key seat of measuring instrument left end 4 use.When measurement, directly contact first by the just center to stem stem 6, the gauge head center of dial gauge 1, and with its end face; Again by between standard component location and installation to two register pin 5 consistent with workpiece pore size and pitch-row length, adjust dial gauge 1 clip position and rotate dial plate, and according to the scale value zero-bit of standard component physical size calibration dial gauge 1, as workpiece nominal size position.Dial gauge 1 takes off standard component after having calibrated, and changes measured workpiece, because stage clip 11 has elasticity, therefore, and the mobile pointer beat that drives dial gauge 1 of slider pad 8 and stem stem 6, the difference of gained measured value and zero-bit is the deviate of measured workpiece size.In the time of clockwise direction in zero-bit of the pointer of dial gauge 1, deviate is negative value; In the time of counter clockwise direction in zero-bit of the pointer of dial gauge 1, deviate be on the occasion of.
The adjustment part that two described location key seats 4 are measuring instruments, its relative distance is adjustable.The location key seat 4 that it is pointed out that the end that keeps left between can the long straight line draw-in groove on holder 9 linear slide, all right reverse 180.Be arranged in this draw-in groove, and by the 3rd screw 14 tightenings; Similarly, keeping right the location key seat 4 of end also can reverse 180.Be arranged in the draw-in groove on slider pad 8, and by the 3rd screw 14 tightenings, can expand further like this two relative distances between register pin 5, so that measuring instrument adapts to wider tested part pitch-row.Described register pin 5 is renewal parts of measuring instrument, be equipped with according to the tested part of different pore size, the diameter of register pin 5 is replaceable, therefore, by location key seat 4, register pin 5 the two adjustment or change and can meet the measurement needs of different pore size and pitch-row workpiece, and can measure quickly and easily the axle class pin-and-hole that two centerline holes are parallel to each other, the distance between borehole of plane cylindrical hole.Because register pin 5 contacts location with measured piece elasticity gapless, can get rid of clamping interference or the clamping gap impact on measured value that Dimension Measurement deviation causes, guarantee that accurate positioning and testing result are reliable.
To sum up, measuring instrument of the present utility model carries out plane positioning by two register pins 5 of axis parallel to measured workpiece, drives the pointer beat of dial gauge 1 by the elastic displacement of slider pad 8, makes its indicating value change, and demonstrates corresponding deviate.Therefore, by adopting standard component can utilize the utility model to compare measurement, be not subject to the impact of measured workpiece processing dimension, not only convenient and reliable operation, detection efficiency are high, and measure numerical stability, precision is high, data intuitive display, is convenient to grasp.By changing the register pin 5 of different size and adjusting the relative position between location key seat 4, the pitch of holes that can measure various axle class pin-and-holes, plane cylindrical hole from.If increase other auxiliary accessories, also can be used for measured hole to the distance between face, be a kind of broad-spectrum universal pitch-row comparing measuring apparatus, both can in workpiece processing, use, also can be used for the finish turn inspection of workpiece.
The foregoing is only preferred embodiment of the present utility model and oneself; not in order to limit the utility model; it should be pointed out that all any amendments of doing within spirit of the present utility model and principle, be equal to replacement and improvement etc., within all should being included in protection domain of the present utility model.