A flatness detection device for an inner square and outer round annular product
By designing a combination of support plate, fixing cylinder, locking screw, positioning column and micrometer, the problem of insufficient flatness detection accuracy in the middle part of the inner circle and outer square ring product in the existing technology is solved, and fast and accurate flatness detection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINXI IND GRP
- Filing Date
- 2025-06-24
- Publication Date
- 2026-06-19
AI Technical Summary
Existing technologies are insufficient for accurately detecting the flatness of the middle part of an inner circle and outer square ring product, and feeler gauges have inadequate detection accuracy.
A flatness testing device was designed, comprising a support plate, a fixed cylinder, locking screws, a positioning post, and a micrometer. The device is supported on the product to be tested by the positioning post, and the flatness difference is measured by the micrometer probe. Accurate testing is achieved by zeroing the device with a standard plate.
It enables rapid and accurate flatness detection of products with inner circles and outer squares, thus improving detection accuracy.
Smart Images
Figure CN224382383U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a flatness testing device for annular products with an inner circle and an outer square, belonging to the field of product flatness measurement technology. Background Technology
[0002] For a certain ring-shaped product with an inner circle and an outer square, accurate flatness measurement is required. The existing inspection method uses a feeler gauge and a standard block. The standard block is placed on the surface to be inspected, and the feeler gauge is inserted through an opening into the gap between the standard block and the perimeter of the surface. The maximum value is the flatness value. This method cannot measure the flatness of the central portion. Furthermore, the feeler gauge itself is a flat surface, making it difficult to accurately measure the flatness of the surface being measured. Utility Model Content
[0003] The purpose of this invention is to provide a device for detecting the flatness of annular products with an inner circle and an outer square.
[0004] The objective of this utility model is achieved through the following technical solution:
[0005] The purpose of this utility model is to provide a flatness testing device for annular products with an inner circle and an outer square shape. The device includes a support plate with a set of micrometer through holes vertically opened on its surface; fixed cylinders fixed to the support plate at each micrometer through hole; locking screws with openings connected to the side walls of each fixed cylinder; three positioning posts arranged in a triangle fixed to the lower surface of the support plate; and a micrometer passing through both the fixed cylinders and the micrometer through holes. The micrometer is vertically positioned by the locking screws.
[0006] The lower support points of the three positioning posts are located on the same reference plane; the flatness difference between the corresponding point of the plane to be measured and the reference plane is measured by the probe of each micrometer.
[0007] Work process
[0008] When measuring flatness, firstly, the flatness is zeroed using a standard plate with a flat upper surface. The three positioning posts of the flatness testing device are then supported on the upper surface of the standard plate, and the pointer readings of the micrometer probes are adjusted to be uniform. Next, the zeroed flatness testing device is used to test the flatness of the surface of the product to be tested. The three positioning posts of the flatness testing device are supported on the surface of the product to be tested, and the pointer readings of the micrometers are observed. If the change in the micrometer pointer reading from the zeroed pointer reading is less than the required flatness value, the flatness of the surface of the product to be tested is qualified; otherwise, it is unqualified.
[0009] Beneficial effects
[0010] The flatness detection device of this invention enables rapid detection of the flatness of the surface of the product under test with high accuracy. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the flatness detection device of this utility model;
[0012] Figure 2 for Figure 1 AA view;
[0013] Figure 3 for Figure 1 Top view. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0015] Example
[0016] like Figure 1-3 As shown, the purpose of this utility model is to provide a flatness testing device for annular products with an inner circle and an outer square shape. The device includes a support plate 1 with a set of micrometer through holes vertically opened on its surface; a fixing cylinder 5 fixed to each micrometer through hole on the support plate 1; locking screws 4 with openings connected to the side walls of each fixing cylinder 5; three positioning posts 2 arranged in a triangle on the lower surface of the support plate 1; and a micrometer 6 passing through each fixing cylinder 5 and the micrometer through hole. The micrometer 6 is vertically positioned by fixing the locking screws 4.
[0017] The lower support points of the three positioning posts 2 are located on the same reference plane; the flatness difference between the corresponding point of the plane to be measured and the reference plane is measured by the probe of each micrometer 6.
[0018] Work process
[0019] When measuring flatness, firstly, the flatness is zeroed using a standard plate 3 with a flat upper surface. The three positioning posts 2 of the flatness testing device are supported on the upper surface of the standard plate 3, and the pointer readings of the probes of each micrometer 6 are adjusted to be uniform. Then, the flatness testing device, after being zeroed, is used to test the flatness of the surface to be tested. The three positioning posts 2 of the flatness testing device are supported on the surface to be tested, and the pointer readings of each micrometer 6 are observed. If the change in the pointer reading of the micrometer 6 compared to the pointer reading after zeroing is less than the required flatness value, the flatness of the surface to be tested is qualified; otherwise, it is unqualified.
Claims
1. A device for detecting flatness of an inner square outer round annular product, characterized in that, The device includes a support plate with a set of micrometer through holes vertically on its surface, a fixing cylinder fixed to each micrometer through hole on the support plate, locking screws with openings connected to the side walls of each fixing cylinder, three positioning posts arranged in a triangle on the lower surface of the support plate, and a micrometer passing through each fixing cylinder and the micrometer through hole. The micrometer is vertically positioned by fixing the locking screws. The lower support points of the three positioning posts are located on the same reference plane. The flatness difference between the corresponding point of the plane to be measured and the reference plane is measured by the probe of each micrometer.