CN110207574A - A kind of aviation screw cross recess depth detection apparatus and its detection method - Google Patents

Abstract

The invention relates to a screw cross groove depth detection device for aviation and a detection method thereof, which includes an indicating dial indicator, and also includes: a measurement base, which is arranged on a zero calibration plane, and is used to support various measurement components; an opening guide bush, It is set in the measuring base to provide vertical guidance for the indicating dial indicator; the knurled screw is tightened and set on the side end surface of the measuring base to fix the position of indicating the dial indicator; the special measuring head is set on the Indicate the end of the dial indicator and cooperate with the measuring base to assist the indication dial indicator to measure. The specific steps of its use are as follows: S1: assembly; S2: detection; the invention is simple, fast and accurate to ensure the manufacturing of cross screws Strength requirements, its positioning, calibration, disassembly, and easy operation ensure the reliability of the product. At the same time, it improves the detection speed and saves manufacturing costs.

Description

An aviation screw cross groove depth detection device and detection method thereof

technical field

The invention relates to a depth detection device, in particular to a depth detection device and a detection method for an aviation screw cross groove.

Background technique

In the manufacture of aviation aircraft products, aviation cross-recessed screws are widely used in the connection of aircraft body structures. They are the load-bearing parts of the mechanical connection of aviation aircraft. It is very important to control and detect the depth of the cross groove, but there is no general inspection tool for measuring the depth of the cross groove.

At present, the depth detection of the cross groove of aviation screws can only be controlled indirectly through the penetration depth of the cross punch. Due to the influence of the elastic deformation of the material, the actual depth of the cross groove is not equal to the penetration depth of the cross punch. depth, it is necessary to detect the depth of the cross groove after stamping. Therefore it is extremely necessary to invent a kind of screw cross recess depth detection device for aviation.

Contents of the invention

In order to solve the above problems, the present invention proposes a device for detecting the depth of cross grooves of aviation screws and a method for using the same.

A screw cross recess depth detection device for aviation, including an indicating dial indicator for measurement and display, and also includes:

The measuring base is set on the zero-calibration plane and is used to support various measuring components;

The open guide bush is arranged in the measuring base and is used to provide vertical direction guidance for the indicating dial indicator;

Tighten the knurled screw and set it on the side end surface of the measuring base to fix the position of the indicating dial indicator;

The special measuring head is arranged at the end of the indicating dial indicator and cooperates with the measuring base, and is used to assist the indicating dial indicator to measure.

The measuring base is provided with an internal thread for tightening the knurled screw, a measuring inner hole 1 for cooperating with the opening guide bush, and a measuring inner hole 2 for cooperating with the special measuring head. The interference of the measuring inner hole 2 is kept between 0.002 mm and 0.005 mm, and the longitudinal section of the measuring base is tapered.

The opening guide bush is provided with an opening inner hole which cooperates with the indicating dial indicator, and the clearance is 0.015mm-0.025mm.

The special measuring head is provided with a spherical surface capable of contacting the maximum depth of the measured cross groove, a tapered surface that is kept out of contact with the inner wall of the measured cross groove, and an outer circle that is kept in cooperation with the second clearance of the measurement inner hole. The amount is 0.015mm to 0.025mm.

The detection method using the screw cross groove depth detection device for aviation, the specific steps are as follows:

S1: Assembly: a: Match the special measuring head with the measuring inner hole 2 of the measuring base, and control the gap between 0.015mm and 0.025mm;

b: Match the opening guide bush with the measuring inner hole 2 of the measuring base, keep the interference between 0.002mm and 0.005mm, and fit it with the measuring base by tightening the knurled screw;

c: Match the indicating dial indicator with the opening inner hole of the opening guide bushing, the gap is controlled between 0.015mm and 0.025mm, so that the ball head of the indicating dial indicator and the special measuring head fit without gap, and the knurling is tightened The screw is firmly in contact with the opening guide bush;

S2: Detection: a: Through the calibration plane at the lower end of the measuring base being aligned with the spherical surface of the special measuring head, point the pointer of the dial indicator to the "0" position;

b: Put the end face of the Phillips screw to be tested flat against the measuring base, and the spherical surface of the special measuring head freely falls into the bottom of the cross groove of the screw, indicating the difference between the pointer of the dial indicator and the original "0" value, which is the cross groove of the screw. processing depth.

The beneficial effects of the present invention are: compared to the traditional method where the exact depth of the cross groove cannot be obtained due to the influence of the elastic deformation of the material, but the depth of the cross groove must be detected after stamping and forming, resulting in low processing efficiency, the present invention is simple, fast and accurate The manufacturing strength requirement of the Phillips screw is guaranteed, and its positioning, calibration, disassembly, and operation are simple, ensuring the reliability of the product, and at the same time, improving the detection speed and saving the manufacturing cost.

Description of drawings

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

Fig. 1 is the front view structure schematic diagram of the present invention;

Fig. 2 is the structural schematic diagram of indicating dial gauge of the present invention;

Fig. 3 is a schematic structural view of the opening guide bushing of the present invention;

Fig. 4 is a side view structural schematic diagram of the opening guide bush of the present invention;

Fig. 5 is the structure schematic diagram of tightening knurled screw of the present invention;

Fig. 6 is a schematic structural view of a dedicated measuring head of the present invention;

Fig. 7 is a schematic structural diagram of the measurement base of the present invention.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further elaborated below.

As shown in Figures 1 to 7, an aviation screw cross groove depth detection device includes an indicating dial indicator 1 for measurement and display, and also includes:

The measuring base 5 is set on the zero-calibration plane and is used to support each measuring component;

The opening guide bushing 2 is arranged in the measuring base 5, and is used to provide a vertical direction guide for the indicating dial indicator 1;

Tighten the knurled screw 3, which is arranged on the side end surface of the measuring base 5, and is used to fix the position indicating the dial indicator 1;

The dedicated measuring head 4 is arranged at the end of the indicating dial indicator 1 and cooperates with the measuring base 5 to assist the indicating dial indicator 1 to perform measurement.

A in Figure 1 is the zero plane.

Compared with the traditional method where the exact depth of the cross groove cannot be obtained due to the influence of the elastic deformation of the material, and the depth of the cross groove must be detected after stamping and forming, resulting in low processing efficiency, the invention is simple, fast and accurate to ensure the manufacturing strength requirements of the cross screw , its positioning, calibration, disassembly, and easy operation ensure the reliability of the product. At the same time, it improves the detection speed and saves the manufacturing cost.

The measuring base 5 is provided with an internal thread 5a cooperating with the tightening knurled screw 3, a measuring inner hole 1 5b cooperating with the opening guide bush 2, and a measuring inner hole 2 5c cooperating with the special measuring head 4. The interference between the opening guide bush 2 and the measuring inner hole 2 5c is kept between 0.002 mm and 0.005 mm, and the longitudinal section of the measuring base 5 is tapered.

The opening guide bush 2 is provided with an opening inner hole 2a that cooperates with the indicating dial indicator 1, and the gap is 0.015mm-0.025mm.

The outer surface of the tightening knurled screw 3 is provided with an internal thread for increasing the friction of the outer surface.

The special-purpose measuring head 4 is provided with a spherical surface 4a capable of contacting the maximum depth of the measured cross groove, a tapered surface 4b kept out of contact with the inner wall of the measured cross groove, and an outer circle 4c kept in clearance fit with the measuring inner hole 2 5c , the gap amount is 0.015 mm to 0.025 mm.

The detection method using the screw cross groove depth detection device for aviation, the specific steps are as follows:

S1: Assembly: a: Match the special measuring head 4 with the measuring inner hole 2 5c of the measuring base 5, and control the gap between 0.015mm and 0.025mm;

b: Cooperate the opening guide bush 2 with the measurement inner hole 2 5c of the measurement base 5, keeping an interference between 0.002mm and 0.005mm, and cooperate with the measurement base 5 by tightening the knurled screw 3;

c: Match the indicating dial indicator 1 with the opening inner hole 2a of the opening guide bush 2, and control the gap between 0.015mm and 0.025mm, so that the ball head of the indicating dial indicator 1 fits the special measuring head 4 without gap , by tightening the knurled screw 3 and contacting the opening guide bush 2, the opening guide bush 2 is squeezed inward by the tightening force of the knurled screw 3, so that the clamping indicator dial indicator 1 is firm;

S2: Detection: a: By measuring the calibration plane at the lower end of the base 5 and the spherical surface 4a of the special measuring head 4, pointing the pointer 1 of the indicator dial to the "0" position;

b: Put the end face of the Phillips screw to be tested flat with the measuring base 5, and the spherical surface 4a of the special measuring head 4 freely falls into the bottom of the cross groove of the screw, indicating the difference between the pointer of dial indicator 1 and the original "0" value, which is The processing depth of the cross groove of the screw is detected by the processing depth of the cross groove, so as to control the processing depth and ensure the product quality.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and what are described in the above-mentioned embodiments and description are only the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention also has various Variations and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. A screw cross groove depth detection device for aviation, comprising an indicating dial indicator (1) for measurement and display, characterized in that: also includes: The measuring base (5) is set on the zero-calibration plane and is used to support each measuring component; The opening guide bushing (2), arranged in the measuring base (5), is used to provide vertical direction guidance for the indicating dial indicator (1); Tighten the knurled screw (3) and set it on the side end surface of the measuring base (5) to fix the position indicating the dial indicator (1); The special measuring head (4) is arranged at the end of the indicating dial indicator (1) and cooperates with the measuring base (5), and is used to assist the indicating dial indicator (1) to perform measurement. 2. A device for detecting the depth of a screw cross groove for aviation according to claim 1, characterized in that: said measuring base (5) is provided with an internal thread (5a) that cooperates with the tightening knurled screw (3) ), measuring inner hole one (5b) matched with the opening guide bushing (2), measuring inner hole two (5c) matched with the special measuring head (4), the opening guiding bushing (2) and the measuring inner hole The interference of the second hole (5c) is kept between 0.002mm and 0.005mm, and the longitudinal section of the measuring base (5) is tapered. 3. An aviation screw cross groove depth detection device according to claim 1, characterized in that: the opening guide bush (2) is provided with an opening inner hole that cooperates with the indicating dial indicator (1) (2a), the amount of clearance is 0.015 mm to 0.025 mm. 4. A device for detecting the depth of cross grooves of aviation screws according to claim 1, characterized in that: the special measuring head (4) is provided with a spherical surface (4a) capable of contacting the maximum depth of the cross grooves to be measured 1. Keep the tapered surface (4b) not in contact with the inner wall of the measured cross groove, and keep the outer circle (4c) that fits with the gap between the second inner hole (5c) and the gap between 0.015mm and 0.025mm. 5. Utilize the detection method of a kind of aviation screw cross groove depth detection device described in any one of claims 1 to 4, it is characterized in that: its specific steps are as follows: S1: Assembly: a: Match the special measuring head (4) with the measuring inner hole 2 (5c) of the measuring base (5), and control the gap between 0.015mm and 0.025mm; b: Match the opening guide bushing (2) with the measuring inner hole 2 (5c) of the measuring base (5) to keep an interference between 0.002mm and 0.005mm, and measure by tightening the knurled screw (3) The base (5) cooperates; c: Match the indicating dial indicator (1) with the opening inner hole (2a) of the opening guide bushing (2), and control the gap between 0.015mm and 0.025mm, so that the ball head of the indicating dial indicator (1) and The special measuring head (4) fits without gap, and is firmly in contact with the opening guide bushing (2) by tightening the knurled screw (3); S2: Detection: a: By measuring the calibration plane at the lower end of the base (5) and the spherical surface (4a) of the special measuring head (4), the pointer of the dial indicator (1) is aligned with the "0" position; b: Put the end face of the Phillips screw to be tested flat against the measuring base (5), and the spherical surface (4a) of the special measuring head (4) falls freely into the bottom of the cross groove of the screw, indicating that the pointer of the dial gauge (1) is in line with the original The difference between the values of "0" is the processing depth of the cross groove of the screw.