A counterbore diameter and depth qualification device

Abstract

The utility model discloses a counterbore diameter and depth qualified detection device, including measuring rod, tubular structure's measuring body, wherein, measuring rod is located measuring body inner ring, and moves along the measuring body axial movement through spacing structure, the outer diameter of measuring rod both ends is respectively processed as the hole diameter of the lower difference and the hole diameter of the upper difference of the counterbore to be measured, is respectively used for measuring the hole diameter of counterbore, and the end face of the same side of measuring body on the hole diameter upper difference of measuring rod is the step surface, and the height difference of step surface is the depth tolerance of the counterbore to be measured, is used for measuring the hole depth of counterbore. The utility model integrates the detection function of counterbore diameter and depth in one detection device, realizes the qualified nature of the simultaneous detection of counterbore diameter and depth, and improves the detection efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a counterbore detection, in particular to a kind of counterbore diameter and depth qualification detection appliance. BACKGROUND

[0002] At present, the diameter detection appliance for various counterbores is mainly through gauge, and the through gauge is the minimum value of hole diameter tolerance, and the stop gauge is the maximum value of hole diameter tolerance, and whether the hole diameter is qualified is judged by the through gauge smoothly inserted into the hole and the stop gauge unable to insert into the hole during detection.The detection appliance for the depth of counterbore is mainly depth gauge, and whether the depth is qualified is judged by the height difference of insertion depth on standard gauge.The above-mentioned detection tools cannot simultaneously detect the qualification of diameter and depth of counterbore.

[0003] Other detection tools, such as caliper, depth gauge, internal diameter micrometer and three coordinates, wherein the measurement accuracy of caliper and depth gauge is low, which cannot meet the detection of high-precision holes;the internal diameter micrometer is limited to space structure, and some multi-segment holes or shallow holes are inconvenient to detect;the three coordinate instrument is complex to operate, long in detection period and high in cost, which is not suitable for large-scale detection on production line. UTILITY MODEL CONTENT

[0004] UTILITY MODEL OBJECT: The utility model aims to provide a kind of counterbore diameter and depth qualification detection appliance, which is simple in structure, convenient to operate, high in precision and capable of detecting hole diameter and hole depth.

[0005] TECHNICAL SCHEME: To achieve the above-mentioned purpose, the utility model discloses a kind of counterbore diameter and depth qualification detection appliance, which includes measuring rod and tubular structure measuring body, wherein the measuring rod is located in the inner ring of measuring body, and moves along the axial direction of measuring body by limiting structure, the outer diameter of the two ends of measuring rod is machined as lower difference and upper difference of the diameter of the counterbore to be measured respectively, the end face on the same side of measuring body as the upper difference of the diameter of measuring rod is stepped face, and the height difference of stepped face is the depth tolerance of the counterbore to be measured.

[0006] Among them, the limiting structure includes screw, rectangular groove is arranged on the outer ring of measuring rod in axial direction, counterbore is arranged on the corresponding position of measuring body in groove, screw passes through counterbore and goes into rectangular groove, and the axial movement of measuring rod is limited.

[0007] Among them, the outer diameter of measuring rod and the inner diameter of measuring body are gap matched.

[0008] Among them, the inner ring of measuring body is formed by cutting step into minimum inner diameter end and maximum inner diameter end, the minimum inner diameter end is matched with the end where lower difference of the diameter of measuring rod is located, and the maximum inner diameter end is matched with the end where upper difference of the diameter of measuring rod is located.

[0009] Among them, the two end faces of measuring rod are perpendicular to central axis.

[0010] The measuring rod is a columnar structural member made of metal material.

[0011] Beneficial effects: the utility model has the advantages that: 1, the utility model integrates the detection function of counterbore diameter and depth in one detector, realizes the qualification of simultaneously detecting counterbore diameter and depth, and improves detection efficiency; 2, the detector is composed of a measuring rod, a measuring body and a limiting structure, and has simple structure and is easy to manufacture and assemble; 3, counterbore detection operation is simple, and the detector is suitable for large-batch counterbore detection on a production line. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a sectional view of the detector;

[0013] Figure 2 It is a schematic diagram of detecting qualified counterbore diameter at the lower end of the detector;

[0014] Figure 3 It is a schematic diagram of detecting qualified counterbore diameter and depth at the lower end of the detector. DETAILED DESCRIPTION

[0015] The technical scheme of the utility model will be described in detail below in combination with embodiments and drawings.

[0016] As shown in the drawings, the counterbore diameter and depth qualification detector comprises a measuring rod 1, a screw 2 and a measuring body 3. Figure 1 The measuring body 3 is a tubular structure, the measuring rod 1 is a columnar structure, the measuring rod 1 is sleeved in the inner ring of the measuring body 3, and the screw 2 is used for limiting.

[0017] A counterbore hole matched with the screw 2 is arranged on the surface of the measuring body 3 in the radial direction, a rectangular groove is arranged on the outer ring of the measuring rod 1 in the axial direction, the head of the screw 2 penetrates through the counterbore hole and goes deep into the rectangular groove. The measuring rod 1 can axially move relative to the measuring body 3 through the limiting action of the screw 2 and the rectangular groove.

[0018] The measuring rod 1 and the measuring body 3 are made of T10A, the two ends are ground, and quenching treatment is performed. The screw 2 is a half counterbore screw standard fastener in accordance with GB / T 74.

[0019] The outer diameter of one end of the measuring rod 1 is processed to be the minimum value of the tolerance of the diameter of the measured counterbore, that is, the lower difference of the diameter, and the outer diameter of the other end is processed to be the maximum value of the tolerance of the diameter of the measured counterbore, that is, the upper difference of the diameter. The planes of the two ends are perpendicular to the central axis of the measuring rod. The outer diameter of the measuring rod 1 is matched with the inner diameter of the measuring body 3. The inner ring of the measuring body 3 forms a minimum inner diameter end and a maximum inner diameter end through cutting steps. The minimum inner diameter end is matched with the end where the lower difference of the diameter of the measuring rod 1 is located, and the maximum inner diameter end is matched with the end where the upper difference of the diameter of the measuring rod 1 is located. Meanwhile, the steps can further limit the direction of the minimum inner diameter end of the measuring rod 1 relative to the measuring body 3. Figure 3(When moving downwards) the movement is limited.

[0020] The end of measuring rod 1 with the lower diameter difference can penetrate into the standard countersunk hole to measure the hole depth, while the end with the upper diameter difference cannot penetrate into the standard countersunk hole.

[0021] The end where the maximum inner diameter of measuring body 3 is located ( Figure 3 The upper end of the hole is ground into a step with a height difference between the left and right sides that corresponds to the tolerance range of the countersunk hole depth to be measured; the other end is a flat surface. Figure 3 (the lower end of the middle).

[0022] When the measuring rod 1 is assembled with the measuring body 3, the end of the measuring rod 1 where the upper diameter difference is located is on the same side as the end of the measuring body 3 where the height difference is located. The screw 2 passes through the countersunk hole of the measuring body 3, and its head extends into the rectangular groove of the measuring rod 1. At the same time, the height difference between the end face of the measuring rod 1 where the lower diameter difference is located and the flat end of the measuring body 3 is controlled. Figure 3 The distance between the lower end face of the measuring rod 1 and the lower end face of the measuring body 3 is the nominal value of the depth of the counterbore to be measured.

[0023] During measurement, first extend the end of the measuring rod 1 containing the upper diameter difference from the measuring body 3 and insert it into the countersunk hole. If it can be inserted, the countersunk hole diameter is determined to be too large and is considered unqualified. If it cannot be inserted, proceed to the next step of testing. Figure 2 As shown;

[0024] Extend the end of the measuring rod 1 where the aperture difference is located from the measuring body 3 and insert it into the countersunk hole. If it cannot be inserted, the aperture is determined to be too small and unqualified. If it can be inserted, proceed to the next step of testing.

[0025] The planar end of measuring body 3 ( Figure 3 The lower end of the measuring rod 1 is placed against the plane of the countersunk hole opening, and the end face where the lower diameter difference of the measuring rod 1 is located is brought into contact with the bottom plane of the countersunk hole. Figure 3 As shown, the testing instrument is rotated 90 degrees to the left and right. If the end face of the aperture difference of the measuring rod 1 is higher than the high end of the height difference of the measuring body 3 (i.e., Figure 3 If the upper end of the measuring rod 1 protrudes beyond the highest point of the measuring body 2, the hole depth is determined to be too small and unqualified. If, at this time, the end face of the measuring rod 1 where the hole diameter difference is located is lower than the lower end of the height difference end of the measuring body 3 (i.e., Figure 3 If the upper end of the measuring rod 1 is lower than the lowest end of the measuring body 2, the hole depth is deemed too large and unqualified. If the end face of the measuring rod 1 where the hole diameter difference is located is between the high end and the low end of the height difference end of the measuring body 3, it is a qualified countersunk hole.

Claims

1. A test instrument for the conformity of countersunk hole diameter and depth, characterized in that, The utility model relates to a measuring device for measuring the depth tolerance of a counterbore, comprising a measuring rod (1) and a tubular measuring body (3), wherein the measuring rod (1) is located in the inner ring of the measuring body (3) and moves axially along the measuring body (3) through a limiting structure, the outer diameter of the two ends of the measuring rod (1) is machined to be the lower difference and the upper difference of the counterbore diameter to be measured respectively, the end face of the measuring body (3) on the same side as the upper difference of the diameter of the measuring rod (1) is a stepped face, and the height difference of the stepped face is the depth tolerance of the counterbore to be measured.

2. The bore diameter and depth qualification apparatus of claim 1, wherein, The limiting structure comprises a screw (2), a rectangular groove is arranged on the outer ring of the measuring rod (1) in the axial direction, a countersunk hole is arranged on the measuring body (3) at the corresponding position of the groove, the screw (2) penetrates into the rectangular groove through the countersunk hole, and the axial movement of the measuring rod (1) is limited.

3. The bore diameter and depth qualification apparatus of claim 1, wherein, The outer diameter of the measuring rod (1) is gap-fitted with the inner diameter of the measuring body (3).

4. The bore diameter and depth qualification apparatus of claim 3, wherein, The inner ring of the measuring body (3) is formed by cutting a step into a minimum inner diameter end and a maximum inner diameter end, the minimum inner diameter end is matched with the end where the lower difference of the diameter of the measuring rod (1) is located, and the maximum inner diameter end is matched with the end where the upper difference of the diameter of the measuring rod (1) is located.

5. The bore diameter and depth qualification apparatus of claim 1 wherein, The two end faces of the measuring rod (1) are planes perpendicular to the central axis.

6. The bore diameter and depth qualification apparatus of claim 1 wherein, The measuring rod (1) is a columnar structural member made of metal material.

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