Chamfer size comparison device and comparison method

Abstract

The present application relates to bolt detection technical field, specifically to a chamfer size comparison device and comparison method thereof, including the clamping seat, the clamping seat is provided with the alignment slot, the sliding slot width of alignment slot gradually narrows along the sliding direction, the clamping seat is provided with straight hole comparison hole, arc comparison hole, tapered comparison hole respectively, three comparison holes are all provided with contact sensing element, contact sensing element is electrically connected with sensing lamp one and sensing lamp two respectively, then according to the bolt type is inserted into corresponding straight hole comparison hole or arc comparison hole or tapered comparison hole, after the bolt cannot continue to insert, rotate the bolt at least one circle, when rotating the bolt, the opening and closing state of sensing lamp one and sensing lamp two is observed synchronously, the bolt is determined to be qualified if the light opening and closing state is met.The present application solves the technical problem of quickly comparing and judging the size precision of different chamfer type bolts.

Description

Technical Field

[0001] This invention relates to the field of bolt inspection technology, and more specifically, to a chamfer size comparison device and comparison method. Background Technology

[0002] In the field of aircraft manufacturing, due to the superior tensile and shear resistance of bolts, a large number of bolts are generally used for fastening in various parts of the aircraft. When installing bolts such as convex head fasteners, high-lock bolts, grooved bolts and blind fasteners, the fit between the chamfer shape of the bottom of the bolt head (such as flat bottom, round bottom, conical bottom) and the mounting hole directly affects the reliability and sealing of the connection.

[0003] The chamfered edges of the holes under the bolt heads are mainly to accommodate the transition radius at the intersection of the fastener head and the shank, ensuring that the fastener head fits properly with the part after installation. If the chamfer is too shallow, it may lead to poor head fit, affecting the mechanical strength of the fastener (excessive compressive stress on the surface and creep of the part material causing a decrease in the preload of the fastener), and also affecting the corrosion resistance of the assembly (a gap will exist under the head). If the chamfer at the hole opening is too deep, it reduces the bearing depth of the hole, which will also affect the mechanical strength.

[0004] However, there is a lack of suitable measuring tools for chamfer dimensions and angles. Traditional inspection methods mostly rely on manual visual inspection or random sampling using general measuring tools (such as calipers and templates). However, the number of bolt parts is huge. If every hole diameter is measured, a lot of manpower is needed to compare them one by one. There are no reference standards. Moreover, the chamfer dimensions of these bolt parts are small, and manual judgment is easily affected by subjective factors, resulting in a high misjudgment rate. Different specifications and types of bolt parts also require frequent replacement of inspection tools, making the operation cumbersome. Summary of the Invention

[0005] The purpose of this application is to provide a chamfer size comparison device and method, which solves the technical problem of quickly comparing and judging the dimensional accuracy of bolts with different chamfer types.

[0006] To solve the above-mentioned technical problems, the solution adopted in this application is as follows:

[0007] A chamfered size comparison device, including a card holder.

[0008] Preferably, the card holder has an alignment groove, and the width of the alignment groove gradually narrows along the sliding direction of the groove.

[0009] Preferably, the card holder is provided with a straight comparison hole, an arc-shaped comparison hole, and a conical comparison hole.

[0010] Preferably, straight hole comparison holes, arc-shaped comparison holes, and conical comparison holes of the same diameter are arranged at the same groove width position of the alignment groove, and the diameter of the straight hole comparison holes, arc-shaped comparison holes, and conical comparison holes is consistent with the groove width at that position.

[0011] Preferably, a contact sensor is provided in each of the straight hole comparison hole, the arc-shaped comparison hole, and the conical comparison hole, and the contact sensor is electrically connected to sensor lamp one and sensor lamp two, respectively.

[0012] Preferably, the contact sensing element includes a first contact and a second contact.

[0013] Preferably, when the first contact and the second contact are triggered simultaneously, the first sensor light is in the on state and the second sensor light is in the off state.

[0014] Preferably, the first contact and the second contact are located on adjacent insertion surfaces on the straight hole comparison hole.

[0015] Preferably, the edge of the arc-shaped comparison hole is set as an arc-shaped hole edge, and the first contact and the second contact are located on adjacent insertion surfaces of the arc-shaped hole edge on the arc-shaped comparison hole.

[0016] Preferably, the edge of the tapered comparison hole is set as a tapered hole edge, and the first contact point and the second contact point are located at both ends of the surface of the tapered hole edge on the tapered comparison hole.

[0017] The alignment groove is slidably provided with bolts.

[0018] The groove width at the sliding start end of the alignment groove is set to the maximum diameter width of the threaded column end of the bolt, and the groove width at the sliding end of the alignment groove is the minimum diameter width of the threaded column end of the bolt.

[0019] The alignment groove is vertically inserted through the inclined platform, the upper surface of the inclined platform is an inclined surface, and the minimum diameter width end of the alignment groove is set at the inclined bottom end of the inclined surface.

[0020] Several alignment marks are evenly and fixedly arranged on the inclined surface of the ramp.

[0021] The first and second contacts are electrically connected to a dual-input AND gate module, which is electrically connected to a relay. The normally open and normally closed contacts of the relay are electrically connected to the on / off control terminals of sensor lamp one and sensor lamp two, respectively.

[0022] The card holder is also fixedly provided with several marking plates, the positions of which correspond to the positions of the straight hole comparison hole, the arc-shaped comparison hole, and the conical comparison hole, respectively.

[0023] A method for comparing chamfer dimensions includes the following steps:

[0024] S1: The induction lamp two is normally open. Place the bolt part at the position of the maximum groove width of the alignment groove. After the bolt part meets the alignment condition, it slides down to the alignment mark.

[0025] S2: Insert it into the corresponding straight hole comparison hole, arc comparison hole or conical comparison hole according to the type of bolt part.

[0026] S3: After the bolt part cannot be inserted further, rotate the bolt part at least one full turn.

[0027] S4: Observe the opening and closing states of the induction lamp one and the induction lamp two synchronously when rotating the bolt part. If it meets the lighting opening and closing states, it is determined that the bolt part is qualified.

[0028] Preferably, the alignment conditions include:

[0029] The threaded column end of the bolt part can be inserted into the alignment groove.

[0030] The bolt part can correspond to the alignment mark.

[0031] Preferably, the determination conditions for the lighting opening and closing states are as follows:

[0032] During the rotation process, if the induction lamp two is always in the closed state from the normally open state and the induction lamp one is always in the open state from the normally closed state, then the bolt part comparison is qualified.

[0033] During the rotation process, if the induction lamp two is always in the normally open state or the induction lamp one is always in the normally closed state, then the bolt part comparison is unqualified.

[0034] During the rotation process, if the induction lamp two or the induction lamp one is in the lighting flashing state, then the bolt part comparison is unqualified.

[0035] The technical solution of this application has at least the following advantages and beneficial effects:

[0036] In order to solve the problem that traditional chamfer size measurement tools require manual quality inspection and judgment, the present invention sets chamfer comparison holes, and double contacts are arranged in each comparison hole and connected to the induction lamp. When the bottom of the nail head of the bolt part is in contact with the chamfer surface of the hole opening and the threaded column end is in contact with the hole wall at the same time, a qualified signal will be triggered, and the detection result is visually reflected by the change of the lighting color, without manual quality inspection reading or experience judgment. Thus, the standard hole position contacts are used to reduce the comparison misjudgment caused by defects such as the tilt of the bolt part and the partial contact with the hole position during manual measurement.

[0037] To address the challenge of comparing the chamfers of numerous bolts of varying diameters and types, this invention utilizes a mounting slot with gradually decreasing width to quickly determine the bolt diameter. Furthermore, it incorporates multiple comparison holes (straight, arc-shaped, and conical) and a contact sensing system at different thread specifications. This allows for the simultaneous detection of three common chamfer types—flat-bottom, round-bottom, and conical-bottom—under different thread specifications, eliminating the need for frequent changes in size comparison fixtures and reducing the complexity of the comparison process. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the present invention.

[0039] Figure 2 This is a top view of the structure of the present invention.

[0040] Figure 3 This is a front view structural diagram of the present invention.

[0041] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0042] Figure 5 This is a cross-sectional view of the straight hole comparison hole in this invention.

[0043] Figure 6 This is a cross-sectional view of the arc-shaped comparison hole in this invention.

[0044] Figure 7 This is a cross-sectional view of the conical comparison hole in this invention.

[0045] Figure 8 This is a cross-sectional view of the present invention. Figure 2 .

[0046] In the diagram: 1-Card holder, 2-Alignment groove, 21-Sloping platform, 22-Alignment mark, 3-Straight hole comparison hole, 31-Straight hole wall one, 32-Outer plane of hole one, 4-Arc-shaped comparison hole, 41-Arc-shaped hole edge, 42-Outer plane of hole two, 43-Straight hole wall two, 5-Conical comparison hole, 51-Conical hole edge, 52-Straight hole wall three, 6-Contact sensor, 61-First contact, 62-Second contact, 7-Induction lamp one, 8-Induction lamp two, 9-Identification plate. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. The terms "center," "upper," "lower," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the figures, or the orientation or positional relationships commonly used when the product is in use, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation on this application. It should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] Example

[0050] Please refer to Figures 1-8 The present invention provides a chamfer size comparison device for comparing the chamfer shape accuracy of the hole edge under the fastener nail head, and determining whether the fit between the fastener and the installation position meets the requirements. It includes a card holder 1, the bottom surface of the card holder 1 is set horizontally so that the card holder 1 can be placed horizontally and maintain its own levelness. The card holder 1 is provided with an alignment groove 2, and a bolt is slidably inserted in the alignment groove 2. The threaded column end of the bolt slides in the groove.

[0051] The width of the alignment groove 2 gradually narrows along the sliding direction of the groove. The width of the groove at the beginning of the sliding of the alignment groove 2 is the maximum diameter width of the threaded column end of the bolt, and the width of the groove at the end of the sliding of the alignment groove 2 is the minimum diameter width of the threaded column end of the bolt. When bolts of different specifications (i.e. different thread diameters) slide in the alignment groove 2, the size and specifications of the bolts can be initially evaluated by the limiting and locking position of the alignment groove 2.

[0052] Furthermore, straight hole comparison hole 3, arc-shaped comparison hole 4, and conical comparison hole 5 are respectively provided on the card holder 1, so that different types of bolts can be inserted to compare the fit of the installation.

[0053] Please refer to the following: Figure 3 and Figure 4In this embodiment, the straight hole alignment hole can be used to insert bolts with matching flat-bottomed nail heads, the arc-shaped comparison hole 4 can be used to insert bolts with matching round-bottomed nail heads, and the conical comparison hole 5 can be used to insert bolts with matching conical-bottomed nail heads (i.e., traditional countersunk bolts). This allows for comparison of the size fit of the chamfered bottom of different nail heads, increasing applicability.

[0054] Preferably, since bolts of different specifications have different thread diameters when their dimensions are compared, the diameters of the corresponding comparison holes also need to correspond one by one. Therefore, the card holder 1 is provided with several straight comparison holes 3, arc comparison holes 4, and conical comparison holes 5 with different diameters.

[0055] Preferably, in order to quickly identify bolts of different specifications and facilitate the insertion of bolts into the corresponding alignment holes, straight hole comparison holes 3, arc comparison holes 4, and conical comparison holes 5 of the same diameter are arranged at the same groove width position of the alignment groove 2, and the diameter of each comparison hole is consistent with the groove width at that position. This allows bolts of different specifications to be quickly inserted into the alignment holes corresponding to the sliding position after sliding and limiting within the alignment groove 2, thereby enabling the screening of bolts of different specifications and pairing them with straight hole comparison holes 3, arc comparison holes 4, and conical comparison holes 5 of the same diameter and groove width.

[0056] It is worth noting that, in order for the bolts inserted into the alignment groove 2 of the card holder 1 to slide quickly to the limit position without requiring the operator to manually adjust them each time, the alignment groove 2 is vertically installed on the inclined platform 21. The upper surface of the inclined platform 21 is an inclined plane, and the minimum diameter width end of the alignment groove 2 is set at the inclined bottom end of the inclined plane. After the operator puts the bolts into the alignment groove 2, the bolts can automatically slide down to the limit position through the inclined plane under the force of gravity.

[0057] It is worth noting that national standard bolts have fixed diameter specifications (such as M6 and M7 bolts). Therefore, the limiting positions of bolts of different specifications within the alignment groove 2 are fixed. Consequently, several alignment marks 22 are evenly and fixedly arranged on the inclined surface of the ramp 21. Each alignment mark 22 corresponds to the limiting groove width of each bolt of a certain diameter. This allows workers to quickly determine the specifications and dimensions of a bolt by matching it with different alignment marks 22, and insert it into the corresponding straight hole comparison hole 3, arc comparison hole 4, or conical comparison hole 5. They can also quickly determine whether the specifications and dimensions of a bolt meet national standard requirements by checking whether the bolt is aligned with the alignment mark 22.

[0058] Furthermore, in order to compare and inspect the chamfering accuracy of the bolt head bottom of different types of bolts, please refer to... Figures 4-7In this embodiment, contact sensors 6 are provided in the straight hole comparison hole 3, the arc-shaped comparison hole 4, and the conical comparison hole 5. The contact sensors 6 are electrically connected to the first sensor lamp 7 and the second sensor lamp 8, respectively. The first sensor lamp 7 and the second sensor lamp 8 are connected to a power source. When the bolt is inserted into the corresponding comparison hole, different numbers of contacts are triggered by the degree of matching and fit between the bolt and the comparison hole, thereby controlling the different sensor lamps to brighten. This allows the staff to directly judge whether the chamfer size of the bottom of the inserted bolt head meets the requirements by the change in light.

[0059] The contact sensing element 6 includes a first contact 61 and a second contact 62.

[0060] Preferably, the first contact 61 and the second contact 62 are electrically connected to a dual-input AND gate module. The AND gate module is electrically connected to a relay. The normally open and normally closed terminals of the relay are respectively connected to the opening control terminals of sensor lamp 7 and sensor lamp 8. In the initial state, sensor lamp 8 is set to red and is normally open, while sensor lamp 7 is set to green and is normally closed. When a bolt is inserted into the comparison hole for detection and comparison, the color change of sensor lamp 7 and sensor lamp 8 can be used to determine whether the bolt has been triggered by the contact and whether the bolt has passed the test.

[0061] Preferably, when the first contact 61 and the second contact 62 simultaneously send trigger signals, the AND gate module receives both signals, the relay closes, its normally closed terminal opens, and its normally open terminal closes (the initial state of the relay is that the normally closed terminal is closed and the normally open terminal is open). At this time, the second sensor lamp 8 is turned off, and the first sensor lamp 7 is turned on. If the first contact 61 and the second contact 62 do not simultaneously send trigger signals (i.e., send a single contact signal or do not send any trigger signals), the AND gate module does not send control signals (the AND gate module will only send control signals to the relay when it receives two trigger signals simultaneously). Therefore, the relay maintains its initial state, the second sensor lamp 8 remains normally open, and the first sensor lamp 7 remains normally closed.

[0062] Please refer to Figure 5In this embodiment, the straight hole comparison hole 3 is a straight hole, which is vertically inserted into the card holder 1. The hole wall of the straight hole comparison hole 3 is the straight hole wall 31, and the outer surface of the upper end of the straight hole comparison hole 3 is the outer surface 32. The first contact 61 and the second contact 62 are respectively set on the outer surface 32 and the straight hole wall 31. When the flat-bottomed screw head is inserted into the straight hole comparison hole 3, if the screw head meets the requirements, the bottom end of the screw head will be in contact with the outer surface 32 and the threaded end will be in contact with the straight hole wall 31, thereby triggering the first contact 61 and the second contact 62 at the same time, causing the first sensor light 7 to turn on (green light) and the second sensor light 8 to turn off (red light), so that the worker can quickly judge that the screw head is qualified. Conversely, if the threaded end of the screw head is tilted or the bottom of the screw head is not flat, the two contacts cannot be triggered at the same time, causing the first sensor light 7 to turn off (green light) and the second sensor light 8 to turn on (red light), indicating that it is unqualified.

[0063] The design uses two contact points to sense two adjacent different planes of the flat-bottomed bolt. Compared to a design where a single contact point is easily triggered, even if the bolt has defects such as tilted threaded end or uneven head, only a single contact point can be triggered, and the two contacts cannot be triggered simultaneously. This maintains the accuracy of the contact point's detection and comparison of the bolt.

[0064] Please refer to Figure 6 In this embodiment, the arc-shaped comparison hole 4 is a straight hole, which is vertically inserted into the card holder 1. The hole wall of the arc-shaped comparison hole 4 is a straight hole wall 43, the upper edge of the arc-shaped comparison hole 4 is an arc-shaped hole edge 41, and the outer surface of the upper edge of the arc-shaped comparison hole 4 is an outer plane 42. The first contact point 61 and the second contact point 62 are respectively set on the outer plane 42 and the straight hole wall 43. When the round-bottomed screw head bolt is inserted into the arc-shaped comparison hole 4, if the bolt meets the requirements, the round bottom of the screw head and the edge of the arc-shaped hole will meet the requirements. 41. When the bolt head is aligned, the bottom end of the bolt head is aligned with the outer plane of the hole 42, and the threaded end is aligned with the straight hole wall 43. This simultaneously triggers the first contact 61 and the second contact 62, causing the first sensor light 7 to turn on (green light) and the second sensor light 8 to turn off (red light). This allows the worker to quickly determine that the bolt is a qualified product. Conversely, if the threaded end of the bolt is tilted or the bottom of the bolt head is irregular, the two contacts cannot be triggered simultaneously, causing the first sensor light 7 to turn off (green light) and the second sensor light 8 to turn on (red light), indicating that the bolt is unqualified.

[0065] The design incorporates two different planes adjacent to the arc-shaped hole edge 41 of the round-bottomed bolt component, which are set to sense the two contacts simultaneously. This ensures that the bolt component can only trigger the two contacts when the arc-shaped hole edge 41 meets the chamfering requirements of the bottom of the nail head, thereby maintaining the accuracy of the contact's detection and comparison of the bolt component.

[0066] Please refer to Figure 7In this embodiment, the conical comparison hole 5 is a countersunk straight hole, which is vertically inserted into the card holder 1. The hole wall of the conical comparison hole 5 is a straight hole wall 52. The upper edge of the arc-shaped comparison hole 4 is a conical hole edge 51, which is an inverted cone. The first contact point 61 and the second contact point 62 are both located on the surface of the conical hole edge 51, and are respectively located at the upper and lower parts of the cone shape. When the conical bottom screw head bolt is inserted into the comparison hole of the conical hole edge 51, if the bolt meets the requirements, the conical bottom of the screw head and the bolt head will meet the requirements. The tapered hole edge 51 is in contact with the bottom of the nail head, which is in contact with the surface of the tapered hole edge 51. The threaded column end is in contact with the straight hole wall 52, thus simultaneously triggering the first contact 61 and the second contact 62, causing the sensor light 7 to turn on (green light) and the sensor light 8 to turn off (red light), allowing the worker to quickly determine that the bolt is a qualified product. Conversely, if the threaded column end of the bolt is tilted or the tapered bottom of the nail head is irregular, the two contacts cannot be triggered simultaneously, causing the sensor light 7 to turn off (green light) and the sensor light 8 to turn on (red light), indicating that it is unqualified.

[0067] Specifically, two contact points are set at both ends of the tapered surface of the tapered hole edge 51 of the tapered bottom bolt component, so that the bolt component can only trigger the two contact points on its tapered surface simultaneously when the tapered hole edge 51 meets the chamfering requirements of the bottom end of the nail head, thereby maintaining the accuracy of the contact point detection and comparison of the bolt component.

[0068] Additionally, please refer to Figure 1 In practical applications, to prevent mistake-proofing, several label plates 9 are fixedly installed on the card holder 1. The positions of the label plates 9 correspond to the positions of the straight hole comparison hole 3, the arc-shaped comparison hole 4, and the conical comparison hole 5, respectively. The label plates 9 are marked with the type of comparison hole, which makes it easy for staff to quickly identify and match them.

[0069] In this embodiment, workers need to pair and compare bolts of different types and specifications. During the actual comparison process, it is necessary to follow the requirements to accurately compare and inspect each bolt. To achieve this effect, a method for comparing chamfer dimensions is also designed, with the following steps:

[0070] S1: Sensor light 28 is normally open. Place the bolt into the maximum width position of the alignment slot 2. After the bolt meets the alignment conditions, it slides down to the alignment mark 22.

[0071] Alignment conditions include:

[0072] The threaded end of the bolt can be inserted into the alignment groove 2.

[0073] The bolts can correspond to alignment mark 22.

[0074] S2: Insert the bolt into the corresponding straight hole comparison hole 3, arc-shaped comparison hole 4, or conical comparison hole 5 according to the type of bolt;

[0075] Bolt types include flat-bottomed head bolts, round-bottomed head bolts, and conical-bottomed head bolts.

[0076] S3: If the bolt cannot be inserted further, rotate the bolt at least one full turn.

[0077] S4: When rotating the bolt, simultaneously observe the on / off status of sensor light 7 and sensor light 8. If the on / off status of the lights is correct, the bolt is considered qualified; otherwise, it is unqualified.

[0078] The conditions for determining the on / off status of the lights are as follows:

[0079] If, during the rotation, sensor light 28 remains in the off state from the normally open state, and sensor light 7 remains in the on state from the normally closed state, then the bolt is considered qualified.

[0080] If, during rotation, sensor light 28 remains in the normally open state, or sensor light 7 remains in the normally closed state, then the bolt is considered unqualified.

[0081] If, during rotation, sensor light 28 or sensor light 17 is flashing, then the bolt is considered unqualified.

[0082] The various embodiments of the present invention have now been described in detail. To avoid obscuring the concept of the invention, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions of this invention based on the above description, and the scope of the invention is defined by the appended claims.

Claims

1. A chamfer size comparison device, characterized in that, Including booth seating (1); The card holder (1) is provided with an alignment groove (2), and the width of the alignment groove (2) gradually narrows along the sliding direction of the groove. The card holder (1) is provided with a straight hole comparison hole (3), an arc-shaped comparison hole (4), and a conical comparison hole (5). The straight hole comparison hole (3), the arc comparison hole (4), and the conical comparison hole (5) of the same diameter are arranged at the same groove width position of the alignment groove (2), and the hole diameter of the straight hole comparison hole (3), the arc comparison hole (4), and the conical comparison hole (5) are consistent with the groove width at that position; Contact sensing elements (6) are provided in the straight hole comparison hole (3), the arc-shaped comparison hole (4), and the conical comparison hole (5). The contact sensing elements (6) are electrically connected to the first sensor lamp (7) and the second sensor lamp (8) respectively. The contact sensing element (6) includes a first contact (61) and a second contact (62); When the first contact (61) and the second contact (62) are triggered simultaneously, the first sensor (7) is in the on state and the second sensor (8) is in the off state. The first contact (61) and the second contact (62) are located on adjacent insertion surfaces on the straight hole comparison hole (3); The edge of the arc-shaped comparison hole (4) is set as an arc-shaped hole edge (41), and the first contact (61) and the second contact (62) are located on the adjacent insertion surface of the arc-shaped hole edge (41) on the arc-shaped comparison hole (4); The edge of the conical comparison hole (5) is set as a conical hole edge (51), and the first contact point (61) and the second contact point (62) are located at both ends of the surface of the conical hole edge (51) on the conical comparison hole (5).

2. The chamfer size comparison device according to claim 1, characterized in that, The alignment groove (2) is slidably provided with bolts; The sliding groove width of the starting end of the alignment groove (2) is set to the maximum diameter width of the threaded column end of the bolt, and the sliding groove width of the sliding end of the alignment groove (2) is the minimum diameter width of the threaded column end of the bolt.

3. The chamfer size comparison device according to claim 2, characterized in that, The alignment groove (2) is vertically inserted on the inclined platform (21), the upper surface of the inclined platform (21) is an inclined surface, and the minimum diameter width end of the alignment groove (2) is set at the inclined bottom end of the inclined surface.

4. The chamfer size comparison device according to claim 3, characterized in that, Several alignment marks (22) are uniformly and fixedly arranged on the inclined surface of the inclined platform (21).

5. The chamfer size comparison device according to claim 1, characterized in that, The first contact (61) and the second contact (62) are electrically connected to the dual-input AND gate module. The AND gate module is electrically connected to the relay. The normally open and normally closed terminals of the relay are electrically connected to the opening control terminals of the first sensor lamp (7) and the second sensor lamp (8), respectively.

6. The chamfer size comparison device according to claim 1, characterized in that, The card holder (1) is also fixedly provided with several identification plates (9), and the positions of the identification plates (9) correspond to the positions of the straight hole comparison hole (3), the arc-shaped comparison hole (4), and the conical comparison hole (5), respectively.

7. A method for comparing chamfer dimensions, characterized in that, Includes the following steps: S1: The second sensor light (8) is normally open. Place the bolt into the maximum slot width position of the alignment slot (2). After the bolt meets the alignment conditions, it slides down to the alignment mark (22). S2: Insert the bolt into the corresponding straight hole comparison hole (3), arc-shaped comparison hole (4), or conical comparison hole (5) according to the type of bolt; S3: If the bolt cannot be inserted further, rotate the bolt at least one full turn; S4: When rotating the bolt, observe the opening and closing status of sensor light 1 (7) and sensor light 2 (8) simultaneously. If the opening and closing status of the lights is consistent, the bolt is deemed qualified.

8. The chamfer size comparison method according to claim 7, characterized in that, The alignment conditions include: The threaded end of the bolt can be inserted into the alignment groove (2); The bolts can correspond to the alignment mark (22).

9. The chamfer size comparison method according to claim 7, characterized in that, The conditions for determining the on / off state of the lights are as follows: During the rotation, if the second sensor lamp (8) remains in the off state from the normally open state and the first sensor lamp (7) remains in the on state from the normally closed state, then the bolt is qualified. If, during the rotation, the second sensor lamp (8) remains in the normally open state, or the first sensor lamp (7) remains in the normally closed state, then the bolt is considered unqualified. If, during rotation, either sensor light 2 (8) or sensor light 1 (7) is flashing, then the bolt is considered unqualified.

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