[0038] The present invention will be further described in detail below in conjunction with the drawings.
[0039] See figure 1 As shown, the measured part 8, because the diameter D of the large-size steel wire bearing track hole 8-1 is greater than 500mm, and there is a hole 8-2 smaller than D at both ends of the hole, so the general plug gauge cannot be placed into the large-size steel In the bearing track hole, or the gauge cannot be removed from the hole after being put into the measurement. Although the part 8 can be measured on the coordinate machine after processing, the measurement efficiency is too low and it cannot be measured on the machine tool.
[0040] See figure 2 with image 3 As shown, the gauge for measuring the diameter of a large-size steel wire bearing track hole of the present invention includes a main body 1, a sleeve 3, a probe 4 and an elastic member 6 for moving the main body 1, and is characterized in that: the main body 1 It is composed of a large measuring cylinder G, a measuring column E connected to the left side of the large measuring cylinder G, and a connecting part 1-1 on the right side; the left end surface of the large measuring cylinder G is the first predetermined value measuring surface C, and the connecting part The outer end of 1-1 is the main body measuring surface Y; the sleeve 3 is provided with an axial hole M with one end open, and the axial hole M is slidably connected to the measuring column E of the main body 1; Is the second predetermined value measuring surface B; the sleeve 3 and the probe 4 are detachably connected through the connecting hole 3-1 and the connecting portion 4-1, and the probe 4 has a probe measuring surface X; the first The gap distance A between the predetermined value measurement surface C and the second predetermined value measurement surface B is a predetermined value, and the gap distance A is greater than the aperture D at both ends of the measured part 8 The diameter difference between the diameter D of the steel wire bearing track hole and the diameter D is 5-10mm; the elastic member 6 is installed between the bottom of the axial hole M and the measuring column E; it also includes a restricting the measuring column E in the casing 3 The limit mechanism of the sliding range in the axial hole M; therefore, after the elastic member 6 is compressed strongly, the gauge can be smoothly placed in the wire bearing track hole of the measured part 8. After no force is applied, the gauge can be pushed by the force of the elastic member 6. The casing 3 is opened to drive the probe measuring surface X of the probe 4 to fully contact the wire bearing track hole of the part 8. At the same time, the gap distance A between the first predetermined value measurement surface B and the second predetermined value measurement surface C is a predetermined value, The gap distance A is greater than the aperture D at both ends of the measured part 8 The diameter difference from the diameter D of the steel wire bearing track hole is 5-10 mm, which can ensure that after the elastic member 6 is compressed, the gauge can be smoothly inserted into the large-sized steel wire bearing track hole.
[0041] The limiting mechanism includes a limiting member 7 provided on the casing 3 and a limiting slot F provided in a corresponding position on the measuring column E; the limiting member 7 extends inwardly on the limiting slot F of the measuring column E , The length of the limit slot F and the aperture D at both ends of the measured part 8 It is compatible with the diameter D of the wire bearing track hole. This allows the entire gauge to move within the restricted range for ease of use.
[0042] The limiting member 7 is a pin or screw, and the corresponding position of the sleeve 3 is provided with a pin hole or a screw hole for fixing the pin or screw; the limiting groove F is a solid groove or a strip with arcs at both ends 形槽. This allows the restriction mechanism to be selectively processed and manufactured, and thus the processing and manufacturing are convenient and easy.
[0043] The measuring surface X of the probe has an axial width H, and the main measuring surface Y has an axial width H; Axial width H and axial width H The range is 0.5~1.5mm, and it is symmetrical to the common axis of this gauge. This can reduce the contact area between the probe measuring surface X and the main measuring surface Y and the steel wire bearing track hole, so that the width of the probe measuring surface X and the main measuring surface Y does not affect the measurement of the diameter D of the steel wire bearing track hole.
[0044] The axial width H and the axial width H Both are 1mm. This kind of effect is better.
[0045] One end of the sleeve 3 has a connecting hole 3-1, the corresponding end of the probe 4 is provided with a connecting portion 4-1, and the sleeve 3 and the probe 4 are detachably connected through the connecting hole 3-1 and the connecting portion 4-1 . Therefore, the replacement and adjustment of the sleeve 3 and the probe 4 are flexible and convenient.
[0046] The connecting hole 3-1 and the connecting portion 4-1 are screw holes and corresponding bolts or pin holes and corresponding pins 5 respectively. This allows the processing and manufacturing of the connecting hole 3-1 and the connecting portion 4-1 to be selected according to needs, which is more convenient.
[0047] The elastic member 6 is a spring or an elastic rubber member, and there is no specific limitation, as long as any elastic member has an elastic effect. The key is to have sufficient elasticity to achieve the required effect.
[0048] See Figure 4 As shown, the gauge of the present invention also has a cooperating plug 2. The two ends of the plug gauge 2 are the qualified measuring terminal T and the unqualified measuring terminal Z; when used, the qualified measuring terminal T and the unqualified measuring terminal Z are placed respectively The longitudinal dimension A of the qualified measurement end T between the first predetermined value measurement surface B and the second predetermined value measurement surface C And the longitudinal dimension A of the unqualified measuring end Z It is compatible with the tolerance of the diameter D of the large-size steel wire bearing track hole. Therefore, the diameter tolerance of the large-size steel wire bearing track hole is converted into the set dimensional tolerance of the distance A between the first predetermined value measurement surface B and the second predetermined value measurement surface C, so that the diameter D of the large-size steel wire bearing track hole Converted to measuring the gap distance A, the gap distance A can be measured directly with the plug gauge 2, and the pass or fail of the qualified measuring end T and the unqualified measuring end Z can be used to determine whether the part size is qualified.
[0049] See Figure 5 As shown, the method for measuring the diameter of a large-size steel wire bearing track hole of the present invention is characterized in that it includes the following steps:
[0050] 1) Debugging distance D; Hold the sleeve 3 and the main body 1 with both hands, and compress the elastic member 6 inward to make the distance D between the main measurement surface Y and the measurement surface X Less than the inner diameter D of the measured part 8;
[0051] 2) Initial position; put the gauge into the position of the inner diameter D of the product part 8 to be measured;
[0052] 3) Keep in contact; hold the sleeve 3 and the main body 1, and make the main body 1 move outward under the action of the elastic member 6, driving the measuring surface X and main measuring surface Y of the probe and the large-size steel wire bearing track hole of the part 8. Surface contact
[0053] 4) Qualification judgment; move the gauge in a small range by hand so that the gauge can be located at the diameter D of the large-size steel wire bearing track hole. When measuring on the machine tool, use the GB/T6093-2001 gauge block measurement according to the size of the gauge block And the said gauge A to ensure the distance D between the main measuring surface Y and the measuring surface X The actual size when the smallest dimension D of the inner diameter of the tested product part 8 is equal, calculate the actual size of the large-size steel wire bearing track hole of the part 8 and judge whether the inner diameter D of the tested product part 8 is qualified;
[0054] 5) Select the plug gauge; if the calculated actual diameter is smaller than the specified value of part 8, you can directly feed according to the actual measured value to ensure that the product part 8 can be 100% qualified. If you do not need the actual size of the inner diameter D of the large-size steel wire bearing track hole to be measured, you can directly use the plug gauge 2 to measure the gap distance A of the gauge. If the longitudinal dimension A of the qualified measuring end T of the plug gauge 2 is The surface can be inserted between the first predetermined value measurement surface C and the second predetermined value measurement surface B, and the longitudinal dimension A of the unqualified measurement end Z If the surface cannot be inserted, it is judged that the size of part 8 is qualified.
