Device for quickly judging whether inner hole is qualified or not

Abstract

The utility model discloses a device for rapidly judging whether an inner hole is qualified or not, and belongs to the technical field of mechanical detection. The device is composed of a conducting ring, two groups of pole needles, an insulating rod and a circuit assembly. The exposed length of the pole needle corresponds to the maximum size and the minimum size of the depth of the inner hole, and the conductive loop is combined to control the on-off of the indicator lamp, so that the depth of the inner hole is quickly judged. The device is simple in structure and convenient to operate, can remarkably improve the detection efficiency and precision, and is suitable for batch detection of tiny inner holes of materials such as graphite.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical detection technical field, in particular to a kind of detection device based on material conductivity performance fast determination whether the inner hole depth of part is qualified. BACKGROUND

[0002] At present, for the detection of graphite and other materials small inner hole depth, usually adopt polar needle insertion hole, the exposed part of polar needle is measured by vernier caliper to indirectly calculate hole depth. This method has the following defects: (1) need to insert, measure and calculate multiple times, time-consuming is longer, and detection efficiency is low;(2) measurement result is influenced by operator experience and reading accuracy, and human error is big;(3) need manual comparison data, cannot realize real-time qualification judgment. Therefore, an urgent need for a kind of structure simple, detection fast and high-precision device to solve the above problems. UTILITY MODEL CONTENT

[0003] To solve the problems of low detection efficiency and large error of inner hole depth in the prior art, the utility model provides a kind of fast detection device based on conductivity, which directly determines whether the inner hole depth is qualified by indicating lamp, with the advantages of simple structure, convenient operation and intuitive result.

[0004] In order to achieve the above utility model purposes, the utility model adopts the following technical solutions:

[0005] A device for quickly determining whether the inner hole is qualified is provided, comprising:

[0006] The detection assembly is provided with two groups, including a first polar needle and a second polar needle, the first polar needle and the second polar needle correspond to the maximum and minimum allowable size of the measured inner hole depth respectively, the first polar needle and the second polar needle are provided with a conductive ring outside, the conductive ring is in contact with the wall of the measured inner hole, and the conductive ring is isolated from the first polar needle and the second polar needle by an insulating rod;

[0007] The circuit assembly includes a power supply and an indicating lamp in series, and the polar needle and the conductive ring in each detection assembly form an independent loop in series and are connected in parallel to the power supply and the indicating lamp.

[0008] Further, the length of the first polar needle and the second polar needle exposed from the conductive ring at the front end is the maximum size and the minimum size of the measured inner hole depth respectively.

[0009] Further, the front end of the conductive ring is provided with a tapered portion.

[0010] Further, the insulating rod is made of epoxy resin or ceramic material.

[0011] Further, the indicating lamp is an LED lamp.

[0012] Further, the conductive ring is a copper rod.

[0013] Further, the first pole needle or the second pole needle is connected with the positive pole of the power supply, and the conductive ring is connected with the negative pole of the power supply.

[0014] When the inner hole depth is qualified:

[0015] When the second pole needle is inserted, since the second pole needle corresponds to the minimum size of the hole depth, the qualified hole depth is necessarily greater than the extension length of the second pole needle, so that the second pole needle is in contact with the hole wall, and the bottom surface of the conductive ring is also in contact with the end surface of the hole, thereby the circuit is conducted, and the corresponding indicator lamp is bright.

[0016] When the first pole needle is inserted, since the first pole needle corresponds to the maximum size of the hole depth, the qualified hole depth is necessarily smaller than the extension length of the second pole needle, so that even if the second pole needle is in contact with the hole bottom, the bottom surface of the conductive ring is not in contact with the end surface of the hole, thereby the circuit is disconnected, and the corresponding indicator lamp is not bright.

[0017] In other cases, the inner hole depth is unqualified, including the case that the inner hole depth is equal to the minimum size or the maximum size, which is also determined as unqualified, for example, if the hole depth is smaller than the minimum size, the two groups of conductive rings cannot contact the end surface of the inner hole, and the indicator lamps are not bright; if the hole depth is greater than the maximum size, the two groups of conductive rings can contact the end surface of the inner hole, and the indicator lamps are bright.

[0018] The device for quickly determining whether the inner hole is qualified has the advantages that the device structure is simple, the manufacturing cost is low, and the device is easy to maintain; when the device detects the inner hole of the conductive material such as graphite, the result can be directly determined through the indicator lamp, without manual measurement or calculation, and the detection speed is fast; meanwhile, the human reading error is avoided, and the detection precision is high. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The figure is a structural schematic diagram of the device.

[0020] In the figure, 1 is a conductive ring, 11 is a tapered part, 2 is an insulating rod, 3 is a first pole needle, 4 is a second pole needle, 5 is a power supply, and 6 is an indicator lamp. DETAILED DESCRIPTION

[0021] The specific implementation manner of the device for quickly determining whether the inner hole is qualified is described below, so that the person skilled in the art can understand the device for quickly determining whether the inner hole is qualified, but it should be clear that the device for quickly determining whether the inner hole is qualified is not limited to the range of the specific implementation manner, and for the person skilled in the art, as long as various changes are within the spirit and range of the device for quickly determining whether the inner hole is qualified limited and determined by the appended claims, the changes are obvious, and all the device for quickly determining whether the inner hole is qualified created by using the device for quickly determining whether the inner hole is qualified is within the protection.

[0022] For example, Figure 1As shown, the device for quickly determining whether the inner hole is qualified comprises:

[0023] The detection assembly is provided with two groups, including the first pole needle 3 and the second pole needle 4, the first pole needle 3 and the second pole needle 4 correspond to the maximum and minimum allowable size of the measured inner hole depth respectively, the first pole needle 3 and the second pole needle 4 are both provided with the conductive ring 1, the conductive ring 1 is in contact with the inner hole wall, and the conductive ring 1 is isolated from the first pole needle 3 and the second pole needle 4 through the insulating rod 2;

[0024] The circuit assembly comprises the power supply 5 and the indicator light 6 in series, and the pole needle and the conductive ring 1 in each group of detection assemblies form an independent loop in series and are connected in parallel to the power supply and the indicator light.

[0025] The length of the first pole needle 3 and the second pole needle 4 exposed from the front end of the conductive ring 1 is the minimum size and the maximum size of the measured inner hole depth respectively. The front end of the conductive ring 1 is provided with a tapered portion 11. The insulating rod 2 is made of insulating materials such as epoxy resin or ceramic, so that the pole needle is disconnected from the conductive ring 1. The indicator light 6 is an LED light, and the conductive ring 1 is a copper rod or a red copper rod with good conductivity. The first pole needle 3 or the second pole needle 4 is connected to the positive pole of the power supply, and the conductive ring 1 is connected to the negative pole of the power supply.

[0026] Taking the detection of the inner hole of a graphite part as an example:

[0027] Step 1: According to the design size of the measured hole depth, the exposed lengths of the first pole needle 3 and the second pole needle 4 are designed as Lmax and Lmin respectively, Lmin is the minimum size of the design size, and Lmax is the maximum size of the design size;

[0028] Step 2: Insert the first pole needle 3 into the hole, if the indicator light 6 does not light, the hole depth is less than Lmax;

[0029] Step 3: Insert the second pole needle 4 into the hole, if the indicator light 6 lights, the hole depth is greater than Lmin;

[0030] If both steps 2 and 3 are satisfied, it is determined that the hole depth is qualified; otherwise, it is determined that the hole depth is unqualified.

[0031] Those skilled in the art should understand that although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application. Obviously, those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application fall within the scope of the claims of the present application, the present application also intends to include these modifications and changes.

Claims

1. A device for quickly determining whether an internal bore is acceptable, characterized in that, The utility model relates to a kind of detection device for inner hole depth, including: Detection component is provided with two groups, including first pole needle and second pole needle, the first pole needle and the second pole needle respectively correspond the maximum and minimum allowable size of the measured inner hole depth, the first pole needle and the second pole needle are all provided with electrically conductive ring outside, the electrically conductive ring is contacted with the measured inner hole wall, and electrically conductive ring is isolated with the first pole needle and the second pole needle by insulating stick; Circuit component includes power supply and indicating lamp in series, and pole needle in each detection component is connected to power supply and indicating lamp in series and forms independent loop with electrically conductive ring.

2. The apparatus of claim 1, wherein, The length of the first pole needle and the second pole needle exposed from the electrically conductive ring at front end is the maximum size and minimum size of the measured inner hole depth respectively.

3. The apparatus of claim 1, wherein, The front end of the electrically conductive ring is provided with a tapered portion.

4. The apparatus of claim 1 wherein, The insulating stick is epoxy resin or ceramic material.

5. The apparatus of claim 1 wherein, The indicating lamp is LED lamp.

6. The apparatus of claim 1, wherein, The electrically conductive ring is copper bar.

7. The apparatus of claim 1 wherein, The first pole needle or the second pole needle is connected with the positive pole of the power supply, and the electrically conductive ring is connected with the negative pole of the power supply.

Images