Magnetic fixed table type circular runout measuring device for short shaft parts

Abstract

A magnetic fixed table circular runout measuring device for short shaft parts, comprising a base, a rotating platform, a micrometer and a micrometer mounting frame; the upper end surface of the base is provided with a boss of a cylindrical structure, a workpiece positioning seat is provided at the center of the top of the boss, and a permanent magnet ring is embedded on the upper end surface of the boss; the rotating platform is provided with a center hole, the rotating platform is sleeved on the outside of the boss through the center hole, and a micrometer mounting frame is provided on one side of the rotating platform; the micrometer is fixed on the micrometer mounting frame, and its measuring head points to the central axis of the workpiece positioning seat. The present invention has the characteristics of simple structure, convenient operation and accurate measurement results, and solves the problem of radial circular runout measurement of small and medium-sized short shaft parts.

Description

Technical Field

[0001] The invention relates to a radial circular runout measuring device for a rotating workpiece, in particular to a magnetically fixed table-type radial circular runout measuring device suitable for short-axis parts, belonging to the technical field of testing and measuring. Background Art

[0002] The circular runout of a rotating workpiece is a comprehensive error. For example, the radial circular runout of a rotating workpiece includes not only the axis translation, tilt, and bending that cause coaxiality errors, but also the roundness error in the shape error of the same cross section. In order to meet the geometric tolerance requirements of the rotating workpiece and ensure the processing quality of the workpiece, it is necessary to measure the radial circular runout of the workpiece during the processing.

[0003] The measurement of the circular runout of a rotating workpiece is usually carried out on a circular runout measuring instrument, that is, the workpiece is supported by the circular runout measuring instrument, and then the measuring device is rotated to read the micrometer value to obtain the measurement result. However, the traditional circular runout measuring instrument is more suitable for measuring the circular runout of large long-axis parts, while for small and medium-sized short-axis parts, the use of the traditional circular runout measuring instrument also requires the configuration of an auxiliary support mechanism, which has the problem of a large number of measuring instrument parts and cumbersome operating steps. Summary of the invention

[0004] The invention provides a magnetically fixed table-type circular runout measuring device for short shaft parts with simple structure and convenient operation, so as to meet the requirements for radial circular runout measurement of small and medium-sized short shaft parts.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A magnetic fixed table circular runout measuring device for short shaft parts comprises a base, a rotating platform, a micrometer and a micrometer mounting frame; a boss of a cylindrical structure is provided on the upper end surface of the base, a workpiece positioning seat is provided at the center of the top of the boss, and a permanent magnet ring is embedded on the upper end surface of the boss; the rotating platform is provided with a center hole, the rotating platform is sleeved on the outside of the boss through the center hole, and a micrometer mounting frame is provided on one side of the rotating platform; the micrometer is fixed on the micrometer mounting frame, and its measuring head points to the central axis of the workpiece positioning seat.

[0007] The magnetic fixed table circular runout measuring device for short shaft parts has a bearing installed between the center hole of the rotating platform and the boss, and the bearing is a radial ball bearing.

[0008] In the magnetically fixed table-type circular runout measuring device for short-axis parts, the permanent magnetic ring is embedded at the outer peripheral position of the workpiece positioning seat.

[0009] The above-mentioned magnetic fixed table circular runout measuring device for short-axis parts, the micrometer mounting frame includes a large rotating arm and a small rotating arm; one end of the large rotating arm is assembled with a threaded hole set on the rotating platform through a locking bolt, and the other end is hingedly assembled with one end of the small rotating arm through a locking screw; the other end of the small rotating arm is provided with a micrometer assembly hole, and a locking bolt is provided in the axial direction of the end face of the small rotating arm.

[0010] The above-mentioned magnetically fixed table-type circular runout measuring device for short-axis parts, the locking bolt is provided with a butterfly nut.

[0011] The above-mentioned magnetic fixed table circular runout measuring device for short-axis parts, the base is a square base, and threaded holes, open slots and leveling components are provided at the four corners of the square base; the open slots are perpendicular to the axis of the threaded holes, and the leveling components include leveling studs and leveling knobs; the leveling studs are screwed into the threaded holes; the leveling knobs are fixedly assembled with the leveling studs, and the leveling knobs are placed in the open slots.

[0012] The above-mentioned magnetic fixed table-type circular runout measuring device for short-axis parts, the base is also provided with a bubble level, and the bubble level is embedded in the side of the base.

[0013] The above-mentioned magnetic fixed table circular runout measuring device for short-axis parts, the base is also provided with a workpiece positioning seat lifting mechanism and a center positioning hole, the workpiece positioning seat lifting mechanism and the workpiece positioning seat are both located in the center positioning hole of the base, the workpiece positioning seat lifting mechanism includes a compression spring and a locking screw plug, the locking screw plug is installed at the bottom of the center positioning hole, and a compression spring is arranged between the locking screw plug and the workpiece positioning seat.

[0014] The present invention is a magnetically fixed table-type circular runout measuring device for short-axis parts. The short-axis workpiece to be tested is placed on a boss of a base, and the workpiece to be measured can be positioned by a workpiece positioning seat, and the workpiece can be fixed by the adsorption of a permanent magnetic ring, and a micrometer is fixed on a rotating platform through a micrometer mounting frame, so that the measuring head of the micrometer points to the workpiece positioning seat, and the measuring head of the micrometer is always in elastic contact with the rotating surface of the workpiece to be measured. With the rotation of the rotating platform, the contact of the micrometer measuring head reciprocates, and the value read by the dial of the micrometer is the circular runout of the rotating surface of the workpiece to be measured. The micrometer mounting frame of the present invention adopts a hinged assembly structure of a large rotating arm and a small rotating arm, which can adjust the installation position of the micrometer according to the size of the measured part, has good universal performance, and can also be removed and folded for storage in the non-working state of the present invention. The present invention also sets leveling components at the four corners of the base, so that the horizontality of the base can be adjusted to ensure the accuracy of the measurement result. It can be seen that the present invention has the characteristics of simple structure, convenient operation and accurate measurement results, and solves the problem of radial circular runout measurement of small and medium-sized short shaft parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 is a schematic diagram of the base structure;

[0017] Figure 3 is a schematic diagram of the cross-sectional structure of the base;

[0018] Figure 4 is a schematic diagram of the rotating platform structure;

[0019] Figure 5 This is a schematic diagram of the structure of the micrometer mounting frame;

[0020] Figure 6 It is a schematic diagram of the working state of the present invention;

[0021] Figure 7 yes Figure 6 K-direction view;

[0022] Figure 8 It is a schematic diagram of the present invention when the micrometer mounting frame is in a folded state.

[0023] The list of reference numbers in the figure is:

[0024] 1. Base, 1-1. Boss, 1-2. Workpiece locating seat, 1-3. Permanent magnetic ring, 1-4. Leveling stud, 1-5. Leveling knob, 1-6. Bubble level, 1-7. Compression spring, 1-8. Locking screw, 1-9. Center locating hole, 1-10. Open slot; 2. Rotating platform, 2-1. Center hole, 2-2. Threaded hole set on the rotating platform; 3. Micrometer, 3-1. Measuring head; 4. Micrometer mounting frame, 4-1. Small swivel arm, 4-2. Large swivel arm, 4-3. Locking screw, 4-4. Butterfly nut, 4-5. Micrometer assembly hole; 5. Bearing; 6. Workpiece. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 4The present invention is a magnetic fixed table circular runout measuring device for short shaft parts, comprising a base 1, a rotating platform 2, a micrometer 3 and a micrometer mounting frame 4; the upper end surface of the base 1 is provided with a boss 1-1 of a cylindrical structure, a workpiece positioning seat 1-2 is arranged at the top center of the boss 1-1, and an annular permanent magnet ring 1-3 is embedded around the upper end surface of the boss 1-1; the rotating platform 2 is provided with a center hole 2-1, the rotating platform 2 is sleeved on the outside of the boss 1-1 through the center hole 2-1, and a radial ball bearing 5 is installed between the center hole 2-1 of the rotating platform 2 and the boss 1-1, and a micrometer mounting frame 4 is arranged on one side of the rotating platform 2; the micrometer 3 is fixed on the micrometer mounting frame 4, and its measuring head points to the central axis of the workpiece positioning seat 1-2.

[0027] See also Figure 1 , Figure 5 The magnetic fixed table circular runout measuring device for short-axis parts described in the present invention has a micrometer mounting frame 4 comprising a large rotating arm 4-2 and a small rotating arm 4-1; one end of the large rotating arm 4-2 is assembled with a threaded hole 2-2 arranged on the rotating platform through a locking bolt, and the other end is hingedly assembled with one end of the small rotating arm 4-1 through a locking screw 4-3; the other end of the small rotating arm 4-1 is provided with a micrometer assembly hole 4-5, and a locking bolt is arranged in the axial direction of the end face of the small rotating arm 4-1; the locking bolt is provided with a butterfly nut 4-4.

[0028] See also Figure 1 , Figure 2 , Figure 3 The magnetic fixed table circular runout measuring device for short shaft parts described in the present invention has a square base 1, and threaded holes, open grooves and leveling components are provided at the four corners of the square base. The leveling components include leveling studs 1-4 and leveling knobs 1-5; the leveling studs 1-4 are screwed into the threaded holes provided at the four corners of the base; the leveling knobs 1-5 are fixedly assembled with the leveling studs 1-4, and the leveling knobs 1-5 are placed in the open grooves 1-10 provided at the four corners of the base 1.

[0029] See also Figure 1 , Figure 2 The magnetic fixed table circular runout measuring device for short shaft parts of the present invention is also provided with a bubble level 1-6 on its base 1, and the bubble level 1-6 is embedded on the four sides of the base 1.

[0030] See also Figure 1 , Figure 3The magnetic fixed table circular runout measuring device for short-axis parts described in the present invention is also provided with a workpiece positioning seat lifting mechanism and a center positioning hole 1-9 on its base 1. The workpiece positioning seat lifting mechanism and the workpiece positioning seat 1-2 are both located in the center positioning hole 1-9 of the base. The workpiece positioning seat lifting mechanism includes a compression spring 1-7 and a locking screw plug 1-8. The locking screw plug 1-8 is installed at the bottom of the center positioning hole 1-9, and the compression spring 1-7 is installed between the locking screw plug 1-8 and the workpiece positioning seat 1-2.

[0031] See also Figure 6 , Figure 7 , Figure 8 When the present invention is used to measure the radial circular runout of a short-axis rotating workpiece 6, the horizontality of the base 1 is first adjusted by the leveling components arranged at the four corners of the base 1, and then the short-axis workpiece 6 to be detected is placed on the boss 1-1 of the base 1, and the workpiece 6 to be measured is positioned by the workpiece positioning seat 1-2, and the workpiece 6 is fixed by the adsorption effect of the permanent magnetic ring 1-3, and the micrometer 3 is fixed on the rotating platform 2 through the micrometer mounting frame 4, so that the measuring head 3-1 of the micrometer 3 points to the workpiece positioning seat 1-2, and the measuring head 3-1 of the micrometer 3 is always in elastic contact with the rotating surface of the workpiece 1 to be measured. As the rotating platform 2 rotates, the contact of the measuring head 3-1 of the micrometer 3 reciprocates, and the value read by the dial of the micrometer 3 is the circular runout of the rotating surface of the measured workpiece 6. The dial gauge mounting frame 4 of the present invention adopts a hinged assembly structure of a large rotating arm 4-2 and a small rotating arm 4-1, and one end of the large rotating arm 4-2 is assembled with a threaded hole 2-2 set on the rotating platform through a locking bolt. Therefore, the installation position of the dial gauge 3 can be adjusted according to the size of the measured part, and has good universal performance. The dial gauge 3 can also be dismantled and folded for storage in the non-working state of the present invention (such as the attached Figure 8 shown).

Claims

1. A magnetic fixed table type circular runout measuring device for short shaft parts, characterized in that: It comprises a base (1), a rotating platform (2), a dial gauge (3) and a dial gauge mounting frame (4); the upper end surface of the base (1) is provided with a boss (1-1) of a cylindrical structure, a workpiece positioning seat (1-2) is arranged at the top center of the boss (1-1), and a permanent magnet ring (1-3) is embedded in the upper end surface of the boss (1-1); the rotating platform (2) is provided with a center hole (2-1), the rotating platform (2) is sleeved on the outside of the boss (1-1) through the center hole (2-1), and a dial gauge mounting frame (4) is arranged on one side of the rotating platform (2); the dial gauge (3) is fixed on the dial gauge mounting frame (4), and its measuring head points to the central axis of the workpiece positioning seat (1-2).

2. The magnetic fixed table circular runout measuring device for short shaft parts according to claim 1 is characterized in that A radial ball bearing (5) is installed between the central hole (2-1) of the rotating platform (2) and the boss (1-1).

3. The magnetic fixed table type circular runout measuring device for short shaft parts according to claim 1 is characterized in that: The permanent magnetic ring (1-3) is embedded at a peripheral position on the outer side of the workpiece positioning seat (1-2).

4. The magnetic fixed table type circular runout measuring device for short shaft parts according to claim 1 is characterized in that: The dial gauge mounting frame (4) comprises a large rotating arm (4-2) and a small rotating arm (4-1); one end of the large rotating arm (4-2) is assembled with a threaded hole (2-2) provided on the rotating platform via a locking bolt, and the other end is hingedly assembled with one end of the small rotating arm (4-1) via a locking screw (4-3); the other end of the small rotating arm (4-1) is provided with a dial gauge assembly hole (4-5), and a locking bolt is provided in the direction of the end face axis of the small rotating arm (4-1).

5. The magnetic fixed table type circular runout measuring device for short shaft parts according to claim 4 is characterized in that: The locking bolt is provided with a butterfly nut (4-4).

6. The magnetic fixed table type circular runout measuring device for short shaft parts according to claim 5 is characterized in that: The base (1) is a square base, and threaded holes, open slots (1-10) and a leveling assembly are provided at the four corners of the square base, and the leveling assembly comprises a leveling stud (1-4) and a leveling knob (1-5); the leveling stud (1-4) is screwed into the threaded hole; the leveling knob (1-5) is fixedly assembled with the leveling stud (1-4), and the leveling knob (1-5) is placed in the open slot (1-10).

7. The magnetic fixed table type circular runout measuring device for short shaft parts according to claim 6 is characterized in that: The base (1) is also provided with a bubble level (1-6), and the bubble level (1-6) is embedded in the side of the base (1).

8. The magnetic fixed table type circular runout measuring device for short shaft parts according to claim 1, 6 or 7, characterized in that: The base (1) is also provided with a workpiece positioning seat lifting mechanism and a central positioning hole (1-9); the workpiece positioning seat lifting mechanism and the workpiece positioning seat (1-2) are both located in the central positioning hole (1-9) of the base; the workpiece positioning seat lifting mechanism comprises a compression spring (1-7) and a locking screw plug (1-8); the locking screw plug (1-8) is mounted at the bottom of the central positioning hole (1-9); and the compression spring (1-7) is installed between the locking screw plug (1-8) and the workpiece positioning seat (1-2).

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