CN-122015615-A - Inner diameter measuring device with force measuring mechanism and inner diameter measuring method

CN122015615ACN 122015615 ACN122015615 ACN 122015615ACN-122015615-A

Abstract

The application discloses an inner diameter measuring device with a force measuring mechanism and an inner diameter measuring method, wherein the inner diameter measuring device comprises a hollow tubular ruler frame, the front or/and the rear of the ruler frame are hollowed, the left end of the ruler frame is detachably connected with a differential head, the right end of the ruler frame is detachably connected with a measuring head, the differential head comprises a micrometer screw rod, a threaded shaft sleeve, a fixed sleeve, a differential cylinder and a force measuring device, when the differential head is connected with the left end of the ruler frame, the micrometer screw rod extends out of the left end of the ruler frame, and when the measuring head is connected with the right end of the ruler frame, the right end of the measuring head extends out of the right end of the ruler frame. The measuring method of the application adopts the inner diameter measuring device. The application eliminates force measurement fluctuation caused by human factors during inner diameter measurement, ensures the accuracy of inner diameter measurement, and reduces the abrasion to the inner wall of a measured workpiece and a micrometer screw in the measurement process. The measuring head provided by the application has various specifications, is suitable for measuring the inner diameters of different sizes, and expands the universality of the inner diameter measuring device.

Inventors

CHEN XICHUN
ZHANG XIAOHUI
Ma Rugen
JIANG XIAOTING
ZHANG ZHIJUN

Assignees

沪东中华造船(集团)有限公司

Dates

Publication Date: 20260512
Application Date: 20260128

Claims (9)

1. The utility model provides an internal diameter measuring device with dynamometry mechanism, a serial communication port, including hollow tubular chi frame, the front of chi frame or/and the fretwork setting in back, the left end of chi frame is provided with first through round hole, the right-hand member of chi frame is provided with first through screw hole, first through round hole and first through screw hole all communicate with each other with the lumen of chi frame, first through round hole, first through screw hole and lumen all set up along the central axis of chi frame, the left end of chi frame is provided with the differential head, differential head and the left end detachable connection of chi frame, the differential head can be placed in the chi frame from the fretwork department of chi frame, the left end of chi frame is provided with the locking screw hole along the radial of chi frame, the right-hand member of chi frame is provided with the gauge head, the gauge head is detachable connection with the right-hand member of chi frame; The micro-head comprises a micro-screw, a threaded shaft sleeve, a micro-cylinder, a force measuring device and a fixed sleeve, wherein the micro-screw penetrates through the threaded shaft sleeve, the micro-screw is in threaded connection with the threaded shaft sleeve, the left end of the micro-screw extends out of the threaded shaft sleeve, the fixed sleeve is fixedly sleeved at the right end of the threaded shaft sleeve, the right side of the fixed sleeve is sleeved with a main sleeve, the main sleeve can move rotationally on the fixed sleeve to drive the micro-screw to move left and right, the surface of the fixed sleeve is provided with a scale, the left end of the main sleeve is provided with the force measuring device capable of driving the micro-screw to move left and right, when the force of the measuring end of the micro-screw reaches a preset value, the force measuring device cannot drive the micro-screw to move, the threaded shaft sleeve is fixed in the first through round hole to connect the micro-head with the left end of the scale frame, and a stop screw is arranged in the stop threaded hole to fix the length of the left end of the micro-screw extending out of the scale frame; The measuring head is in threaded connection with the first through threaded hole, and the right end of the measuring head stretches out of the right end of the ruler frame.
2. The device for measuring the inner diameter with the force measuring mechanism according to claim 1, wherein a second through threaded hole is formed in the left end of the scale frame along the radial direction of the scale frame, a fastening screw is connected to the second through threaded hole in a threaded manner, and when the differential head needs to be fixed to the left end of the scale frame, the end portion of the fastening screw penetrates through the second through threaded hole to enable the threaded shaft sleeve to abut against the inner wall of the first through round hole.
3. An internal diameter measurement device with a load cell according to claim 2, wherein the second through-threaded bore is at an angle of 90 degrees to the stop threaded bore.
4. The internal diameter measuring device with a force measuring mechanism according to claim 1, wherein the diameter of the first through circular hole is 0.05-0.1mm larger than the external diameter of the threaded shaft sleeve, and the left end face of the micrometer screw is spherical.
5. The device for measuring the inner diameter with the force measuring mechanism according to claim 1, wherein the measuring head comprises a cylindrical section and a threaded section matched with the first through threaded hole, the threaded section and the cylindrical section are fixedly connected in a coaxial center, the diameter of the threaded section is larger than that of the cylindrical section, the end face of the cylindrical end far away from the threaded section is spherical, and when the measuring head is fixed at the right end of the measuring frame, the cylindrical end extends out of the right end of the measuring frame.
6. The device of claim 5, further comprising a lock nut, wherein the lock nut is disposed around the threaded section and abuts against the right end of the frame after the measuring head is screwed into the first threaded hole.
7. An inner diameter measuring device with a force measuring mechanism as in claim 1, wherein the blade and the gauge head are both made of alloy steel.
8. The internal diameter measuring device with a force measuring mechanism as defined in claim 1, wherein the left end surface of the lumen is perpendicular to the central axis of the scale frame, and the diameter of the lumen is larger than the diameter of the first through circular hole.
9. An inner diameter measuring method, characterized in that an inner diameter measuring device with a force measuring mechanism according to any one of claims 1-8 is used, comprising the steps of: s1, rotating the differential head to a zero position, and placing the differential head in the ruler frame from the hollowed-out position of the ruler frame; S2, fixing a threaded shaft sleeve of the differential head in a first through hole at the left end of the scale frame, enabling the micrometer screw rod to extend out of the left end face of the scale frame, turning a stop screw in the stop threaded hole, and keeping the stop screw in a loose non-stop state before and during measurement; s3, selecting a measuring head with proper length according to the size of the measured inner diameter, rotating the measuring head from the outer side of a first through round hole at the right end of the ruler frame, adjusting the relative positions of the measuring head and the ruler frame to enable the distance between the right end face of the measuring head and the left end of the micrometer screw to be 2-3mm smaller than the measured inner diameter, and completing assembly of the inner diameter measuring device; s4, keeping zero position of the differential head, and measuring and recording the distance A from the right end of the cylindrical section on the ruler frame to the left end of the micrometer screw; S5, placing the inner diameter measuring device into the aperture to be measured, rotating the force measuring device to enable the left end of the micrometer screw rod to move leftwards, when the force measured at the measuring end of the micrometer screw rod reaches a preset value, enabling the force measuring device to be incapable of driving the micrometer screw rod to move, stopping the movement of the micrometer screw rod, enabling the stop screw rod to abut against the micrometer screw rod, recording the reading B of the differential head, and measuring the inner diameter R=A+B.

Description

Inner diameter measuring device with force measuring mechanism and inner diameter measuring method Technical Field The invention relates to the technical field of precise measurement, in particular to an inner diameter measuring device with a force measuring mechanism and an inner diameter measuring method. Background In the field of manufacturing large-scale equipment such as ship construction, precise measurement of the aperture of equipment or workpieces is a key link for ensuring the assembly quality. Currently, vernier calipers or internal micrometer are commonly used in the industry to make such measurements. However, the prior art has obvious limitations that firstly, the vernier caliper has the problems of insufficient neutrality and positioning precision in the process of measuring the inner diameter due to the structural principle, so that the measured value has high dispersity and low precision, and the high precision requirement is difficult to meet, and secondly, the measurement precision of the inside micrometer is superior to that of the vernier caliper, but the measurement result of the inside micrometer is systematically larger than that of the outside micrometer, mainly because the conventional inside micrometer lacks a unified force measuring device, the measurement result is highly dependent on the hand feeling and experience of an operator, and the measurement force controlled by manual touch is different from person to person, so that obvious force measuring errors are directly introduced. Practice shows that the measurement difference of different operators by using the existing inside micrometer can reach 5-15 mu m generally, and the accuracy and consistency of measurement data are seriously affected. Therefore, in order to eliminate force fluctuation caused by human factors, reduce systematic errors between inner and outer diameter measurement, and realize unification and reliability of measurement results, there is an urgent need for an inner diameter measurement device capable of providing a constant measurement force. Disclosure of Invention Aiming at the defects in the prior art, the application provides an inner diameter measuring device with a force measuring mechanism and an inner diameter measuring method, so as to solve the technical problems of lower measuring precision and the like of the inner diameter measuring device in the prior art. In order to achieve the aim of the invention, the technical scheme provided by the invention is as follows: The utility model provides an internal diameter measuring device with dynamometry mechanism, including hollow tubular chi frame, the preceding or/and the back fretwork setting of chi frame, the left end of chi frame is provided with first through round hole, the right-hand member of chi frame is provided with first through screw hole, first through round hole and first through screw hole all communicate with each other with the lumen of chi frame, first through round hole, first through screw hole and lumen all set up along the central axis of chi frame, the left end of chi frame is provided with the differential head, differential head and the left end of chi frame can dismantle the connection, differential head can be placed in the chi frame from the fretwork department of chi frame, the left end of chi frame is provided with the locking screw hole along the radial of chi frame, the right-hand member of chi frame is provided with the gauge head, the gauge head can dismantle with the right-hand member of chi frame and be connected; The micro-head comprises a micro-screw, a threaded shaft sleeve, a micro-cylinder, a force measuring device and a fixed sleeve, wherein the micro-screw penetrates through the threaded shaft sleeve, the micro-screw is in threaded connection with the threaded shaft sleeve, the left end of the micro-screw extends out of the threaded shaft sleeve, the fixed sleeve is fixedly sleeved at the right end of the threaded shaft sleeve, the right side of the fixed sleeve is sleeved with a main sleeve, the main sleeve can rotate on the fixed sleeve to move so as to drive the micro-screw to move left and right, the surface of the fixed sleeve is provided with a scale, the left end of the main sleeve is provided with the force measuring device capable of driving the micro-screw to move left and right, when the force of the measuring end of the micro-screw reaches a preset value, the force measuring device cannot drive the micro-screw to move, the threaded shaft sleeve is fixed in the first through round hole so as to connect the micro-head with the left end of the scale frame, the micro-screw extends out of the left end of the scale frame, and a stop screw is arranged in the stop screw so as to fix the length of the left end of the micro-screw extending out of the scale frame The measuring head is in threaded connection with the first through threaded hole, and the right end of the measuring head stretches out of the r