Auxiliary tool for measuring thickness of screw countersunk head

Abstract

The utility model provides an auxiliary tool for measuring the thickness of a screw countersunk head, the surface of the auxiliary tool is provided with a plurality of measuring holes, the measuring holes are arranged at intervals, and after the tooth part of the screw enters the measuring holes, the end surfaces of the measuring holes support the bearing surface of the screw so as to stabilize the vertical state of the screw; when the thickness of the screw countersunk head is measured, the measuring tool clamps the end part of the screw and the end part of the auxiliary tool at the same time, so that the thickness of the screw countersunk head is measured. According to the utility model, the auxiliary measuring tool is used for accommodating the tooth part of the screw and supporting the countersunk head part of the screw, so that the screw to be measured can be kept in a vertical state in the measuring process, and the measuring tool can quickly obtain the thickness of the countersunk head of the screw by measuring the total length of the auxiliary tool and the screw.

Description

TECHNICAL FIELD

[0001] The utility model belongs to screw precision measurement technical field especially relates to a kind of auxiliary tools for screw countersunk head thickness measurement. BACKGROUND

[0002] As a kind of widely used in many fields such as machinery, building and other connecting pieces, its quality detection is crucial. The size parameter of screw head, especially head thickness, has a key influence on the connection performance and use safety of screw.

[0003] At present, for most of the screw with arc structure head (such as disc head, round head, large offset head, etc.), the head thickness detection is realized by determining the distance between the highest point of arc surface and the bottom of screw head. However, since the measured point and the plane are not on the same horizontal line, this special geometric structure leads to many difficulties in measuring head thickness.

[0004] The existing measurement method usually needs to rely on projector or two-dimensional and above grade measuring instruments. These high-grade measuring instruments can complete the measurement task to a certain extent, but have many limitations. First of all, they have special requirements for measuring environment, such as temperature, humidity, cleanliness and other environmental factors, which need to be strictly controlled, otherwise it may affect the measurement accuracy. Secondly, the whole measurement process is complex, which needs to be operated by professional personnel, and the measurement time is long, which leads to low efficiency. Because of its complicated operation steps, slow data feedback speed, it cannot meet the timeliness demand in production process. In addition, when measuring with these instruments, points need to be taken on the arc surface, and the point taking operation on the arc surface itself is easy to produce error, which will further cause the measured head thickness data to have certain deviation, thereby affecting the accurate judgment of screw quality, which is not conducive to the production and assembly of precision parts. UTILITY MODEL CONTENTS

[0005] In order to solve the problem of complicated screw measuring process and insufficient precision in the production process of precision parts in the background art, the utility model provides the following technical scheme:

[0006] An auxiliary tool for screw countersunk head thickness measurement, the surface of the auxiliary tool is provided with a plurality of measuring holes, each measuring hole is arranged at intervals, after the tooth part of the screw enters the measuring hole, the end face of the measuring hole supports the bearing surface of the screw to stabilize the vertical state of the screw, when measuring the thickness of the screw countersunk head, the measuring tool clamps the end of the screw and the end of the auxiliary tool at the same time, to complete the measurement of the thickness of the screw countersunk head.

[0007] Wherein, the diameter of each measuring hole is different.

[0008] Further, the edge of the end of each measuring hole is provided with a chamfer.

[0009] Further, the chamfer angle of each of the measuring holes is equal and the direction of the chamfer of each of the measuring holes is the same.

[0010] Further, the diameter of each of the measuring holes is smaller than the maximum diameter of the screw countersunk head to be measured and larger than the diameter of the screw tooth to be measured.

[0011] Further, the chamfer angle of each of the measuring holes is larger than the fillet of the screw bearing surface to be measured.

[0012] Further, the depth of each of the measuring holes is larger than the length of the screw.

[0013] Beneficial effects: the auxiliary measuring tool of the utility model contains the tooth of the screw and supports the countersunk head part of the screw, so that the screw to be measured can keep vertical state in the measuring process, and the measuring tool can quickly obtain the screw countersunk head thickness by measuring the total length of the auxiliary measuring tool and the screw. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a perspective structural schematic view of the auxiliary tool for screw countersunk head thickness measurement according to the utility model embodiment.

[0015] Figure 2 It is a sectional structure schematic view of the auxiliary tool for screw countersunk head thickness measurement according to the utility model embodiment. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the present application more clear, the utility model will be described in further detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model.

[0017] It should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the patent and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the patent.

[0018] Figure 1 It is a perspective structural schematic view of the auxiliary tool for screw countersunk head thickness measurement according to the utility model embodiment.

[0019] REFERENCE Figure 1, the auxiliary tool 1 for screw countersunk thickness measurement is in the shape of a cylinder as a whole, and a plurality of measuring holes 11 are arranged on the end face of the auxiliary tool 1 in intervals. The extending direction of each measuring hole 11 is the same as the extending direction of the auxiliary tool 1, and the depth of each measuring hole 11 is greater than the total length of the corresponding screw 2 to be measured. After the tooth part of the screw 2 to be measured enters the measuring hole 11, the end face of the measuring hole 11 supports the bearing surface of the screw 2 so as to stabilize the vertical state of the screw 2. When the countersunk thickness of the screw 2 is measured, the measuring tool clamps the end part of the screw 2 and the end part of the auxiliary tool 1 at the same time, so that the countersunk thickness of the screw 2 can be quickly measured.

[0020] Figure 2 It is a sectional structure schematic view of the auxiliary tool for screw countersunk thickness measurement according to the utility model embodiment.

[0021] Referring to Figure 2 Specifically, the diameters of each measuring hole 11 are different, and the diameters are set according to the screw 2 specifications commonly used in the processing factory. The edge of the end part of each measuring hole 11 is provided with a chamfer 111 matched with the screw 2 to be measured, and the angles of the chamfers 111 arranged at the end part of each measuring hole 11 are equal and the directions are the same. In the embodiment, the chamfers 111 of each measuring hole 11 are all inclined upward. Further, the diameter of each measuring hole 11 is greater than the diameter of the screw 2 to be measured, and the chamfer 111 at the end part of each measuring hole 11 is greater than the round angle (or chamfer) of the countersunk part of the corresponding screw 2 to be measured. The edge of the countersunk part of the screw 2 to be measured is provided with a round angle (or chamfer), and after the tooth part of the screw 2 to be measured completely enters the measuring hole 11, the bearing surface of the screw 2 to be measured abuts against the end part of the corresponding measuring hole 11, so that the screw 2 to be measured keeps a vertical state in the measuring hole 11. In the above vertical state, the axial direction of the tooth part of the screw 2 is perpendicular to the end face of the auxiliary tool 1, and the lower edge of the countersunk part of the screw 2 abuts against the end face of the auxiliary tool 1.

[0022] When the measurement is performed, after the tooth part of the screw 2 enters the measuring hole 11, the measuring end of the measuring tool clamps one side of the auxiliary tool 1 and the countersunk part of the screw 2 away from the auxiliary tool 1, so that the total length can be quickly obtained. Since the length of the auxiliary tool 1 is a fixed value, the measuring personnel can quickly obtain the countersunk thickness of the screw 2 by obtaining the total length.

[0023] In summary, the auxiliary measuring tool contains the tooth part of the screw and supports the countersunk part of the screw, so that the screw to be measured can keep a vertical state in the measurement process. The measuring tool can quickly obtain the countersunk thickness of the screw by measuring the total length of the auxiliary tool and the screw.

[0024] The specific embodiments of the utility model are described above. Other embodiments are within the scope of the appended claims.

[0025] The terms "exemplary," "example," and the like are used as adjectives to indicate that something is used as an example, instance, or illustration. The terms "exemplary," "example," and the like do not denote "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing a thorough understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described embodiments.

[0026] The above describes optional implementation manners of the embodiments of the present application in combination with the drawings, but the embodiments of the present application are not limited to the specific details in the above implementation manners, and various simple modifications can be made to the technical solutions of the embodiments of the present application within the technical concept scope of the embodiments of the present application, and these simple modifications all belong to the protection scope of the embodiments of the present application.

[0027] The above description of the content of the present specification is provided so that any ordinary person skilled in the art can implement or use the content of the present specification. Various modifications to the content of the present specification are obvious to those skilled in the art, and the general principles defined herein can also be applied to other variants without departing from the protection scope of the content of the present specification. Therefore, the content of the present specification is not limited to the examples and designs described herein, but is consistent with the broadest scope of the principles and novel features disclosed herein.

Claims

1. An aid for measuring the thickness of a countersunk screw, characterised in that, The auxiliary tool (1) is provided with a plurality of measuring holes (11), each measuring hole (11) is arranged at intervals, after the tooth part of the screw (2) enters the measuring hole (11), the end face of the measuring hole (11) supports the bearing surface of the screw (2) to stabilize the vertical state of the screw (2); when measuring the thickness of the screw (2), the measuring tool clamps the end of the screw (2) and the end of the auxiliary tool (1) at the same time, so as to complete the thickness measurement of the screw (2).

2. An aid for measuring the thickness of a countersunk screw head as claimed in claim 1, wherein, The diameters of each measuring hole (11) are different.

3. An aid for measuring the thickness of a countersunk screw head as claimed in claim 2, wherein, The edge of the end of each measuring hole (11) is respectively provided with a chamfer (111).

4. An aid for measuring the thickness of a countersunk screw head as claimed in claim 3, wherein, The angles of the chamfers (111) of each measuring hole (11) are equal, and the directions of the chamfers of each measuring hole (11) are the same.

5. An aid for measuring the thickness of a countersunk screw head as claimed in claim 4, wherein, The diameter of each measuring hole (11) is smaller than the maximum diameter of the corresponding measured screw (2) countersunk head, and the diameter of each measuring hole (11) is greater than the diameter of the corresponding measured screw (2) tooth part.

6. An aid for measuring the thickness of a countersunk screw head as claimed in claim 4, wherein, The angle of the chamfer (111) of each measuring hole (11) is greater than the round angle of the corresponding measured screw (2) bearing surface.

7. An aid for measuring the thickness of a countersunk screw head as claimed in claim 6, wherein, The depth of each measuring hole (11) is greater than the length of the corresponding screw (2).

Images