Part sinking pit P value detection gauge
By using a part countersunk P-value detection gauge, combined with a digital dial indicator and a probe, the problem of large measurement error in part countersunk depth was solved, and accurate control of rivet head protrusion was achieved.
Patent Information
- Application Number
- CN202423188902.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In the existing technology, the measurement error of the recess depth P value of the part is relatively large, which makes it impossible to accurately control the amount of rivet head protrusion after riveting.
A part countersunk P-value inspection gauge is adopted, including a digital dial indicator, a dial indicator base and a probe. The P-value of the part countersunk is accurately measured by reading the digital dial indicator. The amount of protrusion after riveting is controlled by combining the G-value and P-value tolerance of the rivet.
It enables precise control of the recess depth of parts, ensuring that the protrusion of the rivet head after riveting is within the expected range, and reducing measurement errors.
Smart Images
Figure CN223538255U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a gauge for detecting the P-value of part recesses, belonging to the field of fastener assembly technology. Background Technology
[0002] With the development of the industry, the requirements for the protrusion of the rivet head after riveting are becoming increasingly stringent. Riveting is a common assembly connection method in the aerospace field, and the protrusion of the rivet head after riveting, such as... Figure 1 As shown, the size is affected by the rivet head thickness and the countersunk depth. The rivet head thickness can be accurately controlled using the P-value. The rivet P-value is as follows: Figure 2 As shown, the depth of the sinker is usually controlled by the angle and the thickness at the bottom of the hole. Typical sinker dimensions are marked as follows: Figure 3 As shown, this control method results in a large error in the depth of the sinkhole, and the amount of protrusion after riveting cannot be accurately controlled.
[0003] To effectively control the protrusion of the rivet head after riveting, the industry has begun to use the P-value to control the recess depth of parts. The P-value for part recess is, for example... Figure 4 As shown, the recess depth P value of a part cannot be accurately detected using projection. To address this issue, the industry currently uses a projection method after the injection molding material solidifies into a model. However, this method has a large measurement error and cannot accurately control the recess depth of the part. Utility Model Content
[0004] The present invention aims to solve the technical problem that the measurement error of the dimple depth P value is too large, which makes it impossible to accurately control the dimple depth of the parts and the amount of protrusion after riveting cannot be accurately controlled.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0006] The part recess P-value detection gauge includes a digital dial indicator, a dial indicator base, and a probe; the digital dial indicator base is installed at the bottom of the digital dial indicator, and a probe of suitable size and the same angle as the part recess is installed below the dial indicator base.
[0007] The beneficial effects of adopting the above technical solution are:
[0008] This invention allows for a direct determination of the P-value of the countersunk in a part by reading the measurement value from a dial indicator. This enables the control of the P-value tolerance (error) of the rivet and the P-value tolerance of the countersunk in the part to determine the range of rivet head protrusion after riveting. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of a structure where the rivet head protrudes after riveting using existing technology.
[0010] 4-Rivet, 5-Part A, 6-Part B.
[0011] Figure 2 This is a schematic diagram of the P-value structure of the rivet.
[0012] Figure 3 This is a schematic diagram showing the dimensions of a standard sinkhole.
[0013] Figure 4 This is a schematic diagram of the recess depth structure of a part with a P value.
[0014] Figure 5 This is a schematic diagram of the G-value gauge structure.
[0015] Figure 6 This is a schematic diagram of the structure of the part recess P-value detection gauge of this utility model.
[0016] In the diagram: 1-Digital dial indicator, 2-Dial indicator base, 3-Probe.
[0017] Figure 7 for Figure 6 A schematic diagram of the probe structure.
[0018] Figure 8 This is a schematic diagram of the structure of the part recess P-value detection gauge and G-value gauge combined in this utility model.
[0019] Figure 9 This is a schematic diagram of the structure of the part A when measuring the part A with the part recess P-value detection gauge of this utility model. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0021] The part recess P-value detection gauge includes a digital dial indicator 1, a dial indicator base 2, and a probe 3; the digital dial indicator 1 is mounted on the bottom of the dial indicator base 2, and the probe 3, which is of suitable size and at the same angle as the part recess, is mounted below the dial indicator base 2.
[0022] A method for controlling the amount of rivet head protrusion after riveting includes the following steps:
[0023] Step 1: Select a probe 3 of appropriate size and angle with the same diameter as the recess size and angle of part A5. Figure 7 As shown, it is mounted on dial indicator base 2;
[0024] Step Two: Select the corresponding G-value gauge based on the G-value of the recess in part A5. After the G-value gauge is flush with the dial indicator base 2, zero the dial indicator. Figure 8 As shown;
[0025] Step 3: After placing the probe 3 into the recess of part A5, align the dial indicator base 2 with the surface of part A5, and determine the P value of the rivet based on the value displayed on the digital dial indicator 1. Figure 6 As shown;
[0026] Step 4: Based on the measured depth of the recess in part A5, machine it to the same value as the G and P values of the rivet.
[0027] Step 5: After riveting the processed part A5 to rivet 4 and part B6, the amount of rivet head protrusion after riveting can be controlled.
[0028] This invention, under the same angle conditions, uses the same G and P values as the rivet to control the depth of the countersink in the part, and controls the amount of protrusion after riveting by adjusting the tolerance (error) of the P value. The protrusion range = W1 + W2 (Note: W1 is the rivet P value error, and W2 is the part countersink P value error).
Claims
1. A gauge for detecting the P-value of a part's recess, characterized in that: It includes a digital dial indicator (1), a dial indicator base (2), and a probe (3); the digital dial indicator (1) is mounted on the bottom of the dial indicator base (2), and a probe (3) of suitable size and the same angle as the recess of the part is mounted below the dial indicator base (2).