Bearing special measuring tools

In order to ensure product quality, improve test efficiency, test the bearings in the process, using a large number of special measuring tools, which are used most exclusive standard.
1. Standard components
        Currently each bearing plant sources with different standard parts, factory conditions (tools) manufactured by the factory machine repair workshop, only part of the standard parts standard parts, such as the groove diameter selected by the production part. Conditions do not have the facility in addition to a portion of purchased or homemade, almost all parts of the selection by the manufacturer. In general, high precision standard parts manufactured specifically selected by the production of precision parts as standard parts are lower, but so long as a reasonable and proper selection, can also guarantee quality of products bearing parts. Selection of measuring task is to measure them frequently and regularly performed for measuring performance of the test, as a user, must strictly abide by measuring and instrumentation system.
        In addition to the metering chamber benchmark parts, standard parts company in the production workshop basically selected by the production of the part, according to technical conditions certified by the measuring chamber after, you can use as a standard. When measuring chamber test, the standard label manufacturing the standard size and number, the actual size of the standard is based on standard test card issued written prevail. In addition, the end face of the outer diameter or standard also marked with a "|" mark, which is a standard part of the measuring point position, so when the tip sheet adjustment table (or tables corresponding to the tip of the fulcrum) must be in "|" mark on it.
1) Width standard
        The width of the standard used to test the bearing inner ring, an outer ring width. The width of standard parts and G903 series gauges and instruments compatible measure the width of the ring. Face does not allow standard bumps, burrs. There are a amount of work surface bumps and burrs shall re-certification, in order to avoid measurement error.
2) diameter and the outer diameter of standard parts
        Diameter and the outer diameter of standard parts were used to test bearing inner diameter and outer diameter. The inner diameter of the bearing, the outer diameter of the main dimensions of the bearing, is an important project decisions bearing quality. Therefore, the diameter and the outer diameter of the calibration standard must be accurate.
        Member and the inner diameter of the inner diameter of D923 series with the measuring instrument and meter, measure the inner diameter, the inner diameter and the reference amount of variation in a single radial plane runout end face diameter. The outside diameter of standard parts and D913 series with an outer diameter measuring instrument and meter, measure the outside diameter size, the amount of change in the outside diameter in a single radial plane, bus to the base end face of the outer diameter surface inclination amount of change.
3) groove diameter of standard parts
        The groove diameter and outer groove diameter of standard parts were used to check the bearing inner and outer diameter of the channels selected by the product out of parts, its groove diameter, curvature ditch, ditch symmetry, a single radial plane groove diameter change amount and other items must be qualified. Channel standard since the beginning of the outer ditch standard.
        Inner member and the inner channel standard D022 series ditch measuring instrument and meter fitted, used to measure the diameter of the inner channel, the channel diameter variation amount within a single radial plane. Member and the outer channel standard D012 series outer groove meter and instrument matching can be used to measure the diameter of the outer channel, single radial plane inside and outside the channel diameter variation amount.
4) clearance and vibration standard
        Clearance and vibration standard parts were used to examine bearing clearance and vibration, selected by the product out. Clearance of standard parts and X092 series radial clearance gauges and instruments fit, measure the bearing radial clearance. Vibration standard and S0910 or BVT-1 vibration meter fitted, measure bearing vibration acceleration (or velocity) level.
        Use standard should be noted:
        A. There are certain standard technical requirements, such as nominal size and the actual deviation, geometric accuracy, position accuracy, hardness, appearance (including surface roughness and surface defects), so in use must be gently, to prevent damage. Wipe cleaned after use, into the position.
        B. Often encountered in actual production between the standard error, which is marked by the contents of the two standard certification card will be of the form, the part of the measured results are inconsistent, indicating that the actual standard deviation inconsistent labeling information, requires further verification standard, generally allows two standard error of mismatched 0.001mm, if it exceeds the range, should stop using, re-certification.
        C. Standard parts and thermal expansion and contraction of the physical phenomena ferrule, ferrule measured by the impact of cutting temperature during processing, the coefficient of expansion of the size of standard room temperature radically different, because there is a temperature difference between the two (the temperature difference) causing measurement errors. Especially the bearing parts, cylindrical grinding, the temperature difference is particularly evident, which requires the bearing parts and standard parts or close to the same temperature (usually called "Warming"), and then to check on the table. Precision bearings parts to produce more to pay attention to the temperature difference between the issue.
        "One way Warming is on the table, placed between the standard bearing parts, parked for some time (about 15min) and then to be checked. Another method is to be measured on standard processing machine parts cutting fluid "Warming", such as the outer diameter of grinding parts, its fast cutting speed, adjust the machine after the need for timely measure, which requires regular calibration with standard measuring instruments, due to the standard parts has been placed in the machine cutting fluids, while fluid due to the exigencies of cutting heat temperature increases, the temperature of standard parts also will be increased, in such a situation on the table will be reduced with the standard error of the table, to ensure measurement precision processing.
2. Common gauge
1) the amount of curvature R ditch Regulation
        Ditch R curvature gauge (commonly known as the chromosphere scratch), shown in Figure 2-8, the ball across the face to check for R Ring Raceway curvature of the workpiece surface, the gauge will dip balls were ditch curvature inspection less Xuhong Dan.
        Plug diameter maximum limit and minimum limit, namely a large range and small range. Check the rings painted on the channel, and then use a large range of Ring Raceway were scraping the case of red on the channel remaining on the surface was observed in the light, to check the roundness of the valley and the arc of the radius of the curvature.
        Curvature gauge in the production of a large range of intentionally made longer, the small range made shorter, and the gauge marked with the number and size.
2) plug
        Plug shape as shown in Figure 2-9, is used to check the aperture, both ends of the cylindrical surface of the plug is to check the aperture face in the middle portion of the handle. Cylindrical Face divided "over the side" and "end-stop." Check with the plug "over end" to check the hole, "over the end" to enter the hole; with plug "toe" to check the hole, "toe" can not enter the hole, indicating that this piece is qualified, or ineligible.
        Plug the hole is generally used to check the accuracy of the less demanding, I use in the inner and outer blank check dust groove groove diameter.
        Should be used to gauge attention to the problem:
        A. It must be cleared prior to use dust and oil gauge and workpiece, so as not to affect the measurement accuracy.
        B. Not too much force measurement, but firmly and evenly into the measurement part, saw "the end", "toe" of the measurement results and.
        C. Gauge measuring parts should be checked three parts.