Internal and external thread angle gauge assembly suitable for directional thread detection

Abstract

The utility model relates to an internal and external thread angle testing fixture assembly suitable for directional thread detection, comprising an internal thread angle testing fixture and an external thread angle testing fixture, the front part of an axial through hole of an external thread testing fixture main body is provided with an internal thread, and the rear part is slidably connected with an external thread positioning sleeve; the front end face of the external thread detection tool body and the front end face of the external thread positioning sleeve form a first positioning face and a second positioning face of the external thread angle detection tool respectively, the internal thread detection tool body is provided with external threads, and the internal thread positioning sleeve and the locking sleeve are both provided with internal threads and are screwed on the internal thread detection tool body. The angle scale sleeve is slidably connected with the internal thread detection tool body, and the front end face of the internal thread detection tool body and the front end face of the internal thread positioning sleeve form a first positioning face and a second positioning face of the internal thread angle detection tool respectively. According to the utility model, the thread detection of the directional thread can be facilitated, the processing of the directional thread is further facilitated, the cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to an internal and external thread angle inspection tool assembly adapted for directional thread inspection. Background Technology

[0002] In several scenarios, the purpose of directional / positioning threads is to ensure that two parts have a set relative angle / orientation after being screwed together. For example, after screwing a rotating part onto a fixed part (the relatively fixed part among two mutually screwed parts, such as a base), the front of the rotating part faces the same direction as the front of the base, or a specific point on the rotating part is aligned with a specific point on the fixed part or is located in the same axial direction, with the same angle. Since the starting angle (angular position of the starting point) of internal and external thread machining, thread machining quality, thread fit clearance, thread pitch, and thread nominal diameter all affect the realization of the above assembly requirements, the current machining solution usually involves milling multiple sample parts to find the machining data of the sample part that meets the assembly requirements, and then machining based on the machining data of the sample part. Therefore, the preparation cycle in production is long, raw material waste is serious, and production costs are high.

[0003] On the other hand, although existing thread ring gauges and thread plug gauges can be used as internal thread angle gauges and external thread angle gauges respectively to detect the internal and external thread angles in directional threads, the relative rotation angle (attitude) between rotating parts and fixed parts after they are screwed together by directional threads is affected by a variety of factors. The effect after assembly cannot be determined solely based on the starting angle of the internal and external threads obtained by the test. Furthermore, these gauges cannot be used to carry out process inspection to ensure the assembly effect after directional thread processing. Utility Model Content

[0004] The purpose of this invention is to provide a thread inspection tool that can be used for process inspection in directional thread processing, so as to facilitate thread inspection of directional threads, thereby facilitating the processing of directional threads, and helping to reduce costs and improve production efficiency.

[0005] The technical solution of this utility model is: an internal and external thread angle gauge assembly adapted for directional thread detection, comprising an internal thread angle gauge (thread ring gauge, hereinafter referred to as internal thread gauge) and an external thread angle gauge (thread plug gauge, hereinafter referred to as external thread gauge). The external thread angle gauge has an external thread gauge body, and the internal thread angle gauge has an internal thread gauge body. The external thread gauge body is cylindrical (or tubular, with an axial through hole). The front part of the axial through hole of the external thread gauge body has an internal thread (the internal thread parameters are determined according to the external thread parameters being detected). The rear part of the axial through hole of the external thread gauge body (the area behind the front internal thread in the axial through hole) is slidably connected (e.g., with clearance fit) to an external thread positioning sleeve. The external thread positioning sleeve has a locking mechanism for fixing it to the external thread gauge body. The front end face of the external thread gauge body constitutes the first positioning surface of the external thread angle gauge (which can be called the gauge). The A-positioning surface of the component, the front end face of the external thread positioning sleeve constitutes the second positioning surface of the external thread angle gauge (which can be called the B-positioning surface of the gauge component), the internal thread gauge body is provided with external threads (the external thread parameters are determined according to the internal thread parameters to be detected, for example, the rough-machined internal thread), and an internal thread positioning sleeve (or sleeve), an angle scale sleeve and a locking sleeve are sequentially fitted on the front and back, the internal thread positioning sleeve and the locking sleeve are both provided with internal threads, screwed (threaded connection) on the internal thread gauge body, the angle scale sleeve is slidably connected to the internal thread gauge body (a movable connection that allows the angle scale sleeve to slide on the internal thread angle gauge, for example, clearance fit), the front end face of the internal thread gauge body constitutes the first positioning surface of the internal thread angle gauge (which can be called the C-positioning surface of the gauge component), and the front end face of the internal thread positioning sleeve constitutes the second positioning surface of the internal thread angle gauge (which can be called the D-positioning surface of the gauge component).

[0006] Preferably, the main body of the internal thread gauge is cylindrical, and its front end face is planar (located in the same plane) and perpendicular to its axis.

[0007] Preferably, the front end face of the internal thread positioning sleeve is planar (located in the same plane) and perpendicular to its axis.

[0008] Furthermore, the axis of the internal thread positioning sleeve and the axis of the internal thread inspection fixture body are on the same straight line (or overlap).

[0009] Preferably, the outer side of the angle scale sleeve is provided with an angle scale (usually in the form of a scale). The angle scale can usually be a 360° scale that can be encircled, or it can be only in a local area in the circumferential direction, depending on the actual testing needs.

[0010] The inner diameter of the angle scale sleeve can be larger than (slightly larger than) the major diameter of the outer thread of the internal thread gauge body, so as to allow the angle scale sleeve to slide on the internal thread gauge body, and the fit clearance is within the allowable range.

[0011] Preferably, the angle scale sleeve is provided with a locking mechanism for securing it to the body of the internal thread gauge.

[0012] Preferably, the locking mechanism of the angle scale sleeve is a threaded fastening mechanism. For example, the side wall of the angle scale sleeve is provided with a radially through fastening screw hole, and an angle scale sleeve clamping screw (or fastening screw) is screwed into the fastening screw hole on the side wall of the angle scale sleeve. The angle scale sleeve clamping screw can be regarded as a set screw (tightening screw). When the angle scale sleeve clamping screw is tightened, its inner end is pressed against the internal thread gauge body, thereby realizing the fixation of the angle scale sleeve on the internal thread gauge body.

[0013] The locking mechanism of the angle scale sleeve can be one or more (for example, two symmetrically arranged).

[0014] Preferably, the main body of the external thread gauge is cylindrical, and its front end face is planar (located in the same plane) and perpendicular to its axis.

[0015] Preferably, the front end face of the external threaded positioning sleeve is planar (located in the same plane) and perpendicular to its axis.

[0016] Furthermore, the axis of the external thread positioning sleeve and the axis of the external thread inspection fixture body are on the same straight line (or overlap).

[0017] Preferably, the front end (front end) of the outer side (outer circumferential surface) of the external thread gauge body is provided with an angle scale (usually in the form of a scale). The angle scale can usually be a 360° scale that can go around the whole circle, or it can be only in a local area in the circumferential direction, depending on the actual testing needs.

[0018] The outer front surface of the main body of the external thread gauge can be in the shape of a cone (frustum), and the angle scale of the front end of the outer surface of the main body of the external thread gauge is set on the cone.

[0019] The outer diameter of the external thread positioning sleeve is smaller than (slightly smaller than) the inner diameter of the axial through hole of the external thread gauge body in its area (active area), thereby realizing the sliding connection between the external thread positioning sleeve and the external thread gauge body, and the fitting clearance is within the allowable range.

[0020] Preferably, the locking mechanism of the external threaded positioning sleeve is a threaded fastening mechanism. For example, the side wall of the external thread positioning sleeve is provided with a radially extending fastening screw hole (blind hole or through hole), and an external thread positioning sleeve clamping screw (or fastening screw) is screwed into the fastening screw hole on the side wall of the external thread positioning sleeve. The side wall of the external thread gauge body is provided with an axially extending strip hole (a hole with a long strip cross-section, whose axial dimension and position should meet the sliding requirements of the external thread positioning sleeve). The external thread positioning sleeve clamping screw passes through the corresponding strip hole on the side wall of the external thread gauge body, and its head protrudes outside the strip hole (or, protrudes outside the external thread gauge body) and its size is larger than the width of the strip hole (the size in the width direction of the strip hole is larger than the width of the strip hole, that is, a size / shape that is not allowed to pass through the strip hole is adopted). When the external thread positioning sleeve clamping screw is tightened, the head of the external thread positioning sleeve clamping screw is pressed against the external thread gauge body, thereby realizing the fixation of the external thread positioning sleeve on the external thread gauge body.

[0021] The beneficial effects of this utility model are as follows: Because it includes internal and external thread angle gauges, it can separately detect the internal and external thread angles in directional threads. By coordinating with appropriate machining processes, after machining the external thread, the starting angle for internal thread machining is determined based on the detection data of the external thread's starting angle and assembly requirements. This ensures that the internal and external threads conform to the set starting angle relationship, meeting the angle / orientation requirements between the two parts that engage after product assembly. Furthermore, because both the internal and external thread angle gauges are equipped with axially adjustable positioning sleeves, the axial position of the positioning sleeves can be adjusted according to the thread design requirements, effectively expanding the applicable range. Since the angle scale sleeve of the internal thread angle gauge is rotatable, it can be calibrated for difference detection according to the process detection requirements of directional threads. Using the calibrated internal thread angle gauge, the difference in the starting angle of the internal thread can be directly read, reducing data processing steps and facilitating use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the internal thread angle measuring tool involved in this utility model;

[0023] Figure 2 This is a schematic diagram of the external thread angle measuring tool involved in this utility model;

[0024] Figure 3 This is a flowchart illustrating the directional thread processing and inspection process involved in using the thread inspection tool of this utility model to perform directional thread processing.

[0025] The markings in the diagram are as follows: 10. External thread gauge body; 11. Front end face of the external thread gauge body; 12. Strip hole; 13. Front end of the outer side of the external thread gauge body; 15. Internal thread at the front of the axial through hole of the external thread gauge body; 20. External thread positioning sleeve; 21. Front end face of the external thread positioning sleeve; 24. External thread positioning sleeve clamping screw; 30. Internal thread gauge body; 31. Front end face of the internal thread gauge body; 35. External thread on the internal thread gauge body; 40. Internal thread positioning sleeve; 41. Front end face of the internal thread positioning sleeve; 50. Angle scale sleeve; 54. Angle scale sleeve clamping screw; 60. Locking sleeve. Detailed Implementation

[0026] See Figures 1 to 3 This type of thread inspection tool is an internal and external thread angle inspection tool assembly (or inspection tool assembly), comprising an internal thread angle inspection tool and an external thread angle inspection tool. The external thread angle inspection tool has an external thread inspection tool body 10, and the internal thread angle inspection tool has an internal thread inspection tool body 30. For any internal and external thread angle inspection tool assembly, there can be one external thread angle inspection tool and two internal thread angle inspection tools, one for roughing internal thread angle inspection and one for finishing internal thread angle inspection. The thread pitch diameter of the roughing internal thread angle inspection tool is smaller than that of the finishing internal thread angle inspection tool, for example, 0.6 mm smaller, as a finishing allowance. The thread pitch diameters of the external thread angle inspection tool and the finishing internal thread angle inspection tool are based on the inspection requirements of the corresponding thread design. The roughing internal thread angle inspection tool can be used for process measurement after the roughing of the internal thread is completed to determine the starting angle of the internal thread required for roughing. The finishing internal thread angle inspection tool is used for quality inspection of the internal thread after finishing. The tooling assembly may not include a tooling for inspecting the angle of the finished internal thread. Instead, other suitable tools can be used to inspect the quality of the internal thread, depending on the actual needs.

[0027] The main body of the external thread gauge is cylindrical. The front part of the axial through hole of the main body of the external thread gauge is provided with an internal thread 15. The rear part of the axial through hole of the main body of the external thread gauge is slidably connected (e.g., clearance fit) to an external thread positioning sleeve 20. The external thread positioning sleeve is provided with a locking mechanism for fixing it to the main body of the external thread gauge. The front end face 11 of the main body of the external thread gauge constitutes the first positioning surface of the external thread angle gauge, and the front end face 21 of the external thread positioning sleeve constitutes the second positioning surface of the external thread angle gauge.

[0028] An angle scale is provided on the front end 13 of the outer side of the main body of the external thread inspection tool.

[0029] The locking mechanism of the external thread positioning sleeve is a threaded fastening mechanism. For example, the side wall of the external thread positioning sleeve is provided with a radially extending fastening screw hole, and an external thread positioning sleeve clamping screw 24 is screwed into the fastening screw hole on the side wall of the external thread positioning sleeve. The side wall of the external thread gauge body is provided with an axially extending strip hole 12. The external thread positioning sleeve clamping screw passes through the corresponding strip hole on the side wall of the external thread gauge body, and its head protrudes outside the strip hole and its size is larger than the width of the strip hole. When the external thread positioning sleeve clamping screw is tightened, the head of the external thread positioning sleeve clamping screw is pressed against the external thread gauge body, thereby fixing the external thread positioning sleeve on the external thread gauge body.

[0030] Typically, when machining internal and external threads, the default value for the thread starting angle is 0°. Internal and external threads are screwed in relative to each other during installation, with their starting points differing by 180°. Therefore, to facilitate the machining of external threads on workpieces, the starting angle of the external thread angle gauge is set to 180°.

[0031] The main body of the external thread angle gauge includes: an angle scale for viewing angle values; an internal thread structure, which is an important part involved in measurement; and the A-positioning surface of the gauge, which plays a positioning role in measurement and calibration.

[0032] The external thread positioning sleeve is movable and can measure the external thread angle of 10-60mm length; the B positioning surface of the gauge plays a positioning role in measurement and calibration.

[0033] The clamping screw is used to secure the external threaded positioning sleeve.

[0034] General usage of external thread angle gauges:

[0035] 1) When the internal thread locating surface of the angle gauge is used as the locating surface, the angle of the external thread to be measured can be directly measured and the angle deviation value can be read.

[0036] 2) When the external thread positioning surface of the angle gauge is used as the positioning surface, the external thread positioning sleeve should be adjusted to the required position first, the clamping screw should be fixed, and then the angle of the external thread should be measured and the angle deviation value should be read.

[0037] The internal thread gauge body has an external thread 35, and an internal thread positioning sleeve 40, an angle scale sleeve 50, and a locking sleeve 60 are sequentially fitted on its front and rear sides. Both the internal thread positioning sleeve and the locking sleeve have internal threads and are screwed onto the internal thread gauge body. The angle scale sleeve is slidably connected to the internal thread gauge body. The front end face 31 of the internal thread gauge body forms the first positioning surface of the internal thread angle gauge, and the front end face 41 of the internal thread positioning sleeve forms the second positioning surface of the internal thread angle gauge.

[0038] The locking mechanism of the angle scale sleeve is a threaded fastening mechanism. For example, the side wall of the angle scale sleeve is provided with a radially through fastening screw hole, and an angle scale sleeve clamping screw 54 is screwed into the fastening screw hole on the side wall of the angle scale sleeve. The angle scale sleeve clamping screw can be regarded as a set screw. When the angle scale sleeve clamping screw is tightened, its inner end is pressed against the internal thread gauge body, thereby realizing the fixation of the angle scale sleeve on the internal thread gauge body.

[0039] In the internal thread angle gauge, the positioning scale sleeve and the gauge body are separate, so the thread starting angle of the internal thread angle gauge does not need to be considered during the machining process.

[0040] Internal thread angle gauges include:

[0041] 1) The main body of the fixture includes: the external thread structure, an important part involved in measurement; and the fixture C positioning surface, which plays a positioning role in measurement and calibration.

[0042] 2) Internal thread positioning sleeve: It moves by rotating the thread and can measure the internal thread angle with a depth of 10-60mm; the positioning surface D of the gauge plays a positioning role in measurement and calibration.

[0043] 3) Angle scale sleeve: Rotate to zero and check the angle value;

[0044] 4) Clamping screw: Used to fix the angle scale sleeve to the internal thread positioning sleeve after the angle scale sleeve has been rotated to zero;

[0045] 5) Locking sleeve: After calibration, it is used to fix the internal thread positioning sleeve.

[0046] Common methods for inspecting internal thread angles:

[0047] The machining process for directional threads can be as follows: First, use a roughing gauge to make a preliminary measurement of the internal thread angle, make fine adjustments, and then perform finishing. Then, use a finishing gauge to measure the internal thread angle. The thread pitch diameter of the roughing gauge is 0.6mm smaller than the normal one, which is the finishing allowance.

[0048] When the external thread locating surface of the angle gauge is used as the locating surface, the locating sleeve of the external thread angle gauge should first be adjusted to the required position, and the internal thread angle gauge should be screwed into it. After tightening, the locating scale sleeve of the internal thread angle gauge should be fitted with the external thread angle gauge, and the 0° scale line on the locating scale sleeve should be aligned and calibrated with the 0° scale line on the external thread angle gauge. Then, the clamping screw on the internal thread angle gauge should be tightened. Finally, the internal thread angle should be measured, and the angle deviation value should be read.

[0049] When the internal thread locating surface of the angle gauge is used as the locating surface, the above method should also be adopted: first calibrate and then perform internal thread angle detection, and read the angle deviation value.

[0050] When setting up two processes for internal thread machining—roughing and finishing—the internal thread angle is first initially measured using an internal thread angle gauge suitable for the rough-machined internal thread. During the subsequent finishing process, the initial angle is finely adjusted based on the preliminary measurement data. After finishing, the internal thread angle is measured again using an internal thread gauge suitable for the finished internal thread. The thread pitch diameter of the internal thread gauge used after roughing is 0.6 mm smaller than that used for normal thread inspection (e.g., for inspecting the internal thread after finishing). This is the finishing allowance.

[0051] Machining and inspection process for directional threads:

[0052] 1. External threaded parts

[0053] 1) External thread milling and measurement: The dimensional accuracy of the external thread of the part is measured using a thread ring gauge of relevant accuracy. The go gauge must be passable and the no-go gauge must be no-go. When machining the external thread first, the preset value of the thread machining start angle can be set to 0°.

[0054] 2) Based on the mating relationship, use an external thread angle gauge to inspect the machined external thread parts. Among these,

[0055] i) When the mating relationship is that the bottom surface of the external thread of the part is in contact with the top surface of the internal thread, first loosen the two clamping screws on the external thread angle gauge, then screw the external thread of the part completely into the external thread angle gauge, so that the bottom surface of the external thread of the part is in close contact with the positioning surface A of the gauge, and read the angle scale value. Then, according to the requirements of the assembly angle in the drawing, calculate the starting angle of the internal thread machining.

[0056] ii) When the mating relationship is that the top surface of the external thread of the part is positioned with the bottom surface of the internal thread, first loosen the two clamping screws on the external thread angle gauge, adjust the position of the external thread positioning sleeve of the gauge so that the dimension between the positioning surface A and the positioning surface B of the gauge is consistent with the depth dimension of the internal thread hole to be measured, then tighten the two clamping screws on the external thread angle gauge, then screw the external thread of the part into the body of the external thread angle gauge so that the top surface of the external thread of the part is in close contact with the positioning surface B of the gauge, and read the angle scale value. Then, according to the requirements of the assembly angle in the drawing, calculate the starting angle for internal thread machining.

[0057] 2. Internal threaded parts

[0058] 1) The calculation method for the starting angle of rough machining of internal threads is: starting angle of rough machining of internal threads = 180° ± angle measured by external thread angle gauge ± assembly angle.

[0059] 2) Use the calculated starting angle for roughing the internal thread to perform rough milling of the internal thread, leaving a 0.3mm allowance on each side, and use a roughing internal thread starting angle gauge for process measurement.

[0060] 3) Process Measurement: Based on the mating relationship, calibrate the internal thread angle gauge using an external thread angle gauge. Among these,

[0061] i) When the mating relationship is such that the bottom surface of the internal thread of the part is in contact with the upper end surface of the external thread for positioning:

[0062] a) First, loosen the two clamping screws on the external thread angle gauge. Adjust the position of the external thread positioning sleeve of the gauge so that the dimension between the positioning surface A and the positioning surface B of the gauge is consistent with the internal thread depth dimension of the part. Then tighten the two clamping screws on the external thread angle gauge. Next, screw the body of the internal thread angle gauge into the body of the external thread angle gauge so that the positioning surface C of the internal thread angle gauge is in close contact with the positioning surface B of the external thread gauge. Adjust the position of the internal thread positioning sleeve and the angle scale sleeve so that the positioning surface D of the gauge is 3-5mm away from the positioning surface A of the gauge. Tighten the locking sleeve to fix it. Then loosen the clamping screws on the internal thread angle gauge. Align the 0° mark on the angle scale sleeve with the scale line of the external thread angle gauge (refer to the drawing requirements) for calibration. Finally, tighten the clamping screws to complete the calibration of the internal thread angle gauge.

[0063] b) Screw the calibrated internal thread angle gauge body into the threaded inner hole of the part to be measured, so that the C positioning surface of the gauge is in close contact with the bottom surface of the threaded hole of the part, and read the difference between the angle scale line (reference line / datum line of the angle position) on the part and the 0° line of the gauge to obtain the adjustment angle difference value of the internal thread finishing.

[0064] ii) When the mating relationship is such that the upper end face of the internal thread of the part is in contact with the lower bottom face of the external thread for positioning:

[0065] a) First, loosen the two clamping screws on the external thread angle gauge. Adjust the position of the external thread positioning sleeve of the gauge so that the dimension between the positioning surface A and the positioning surface B of the gauge is consistent with the external thread height dimension of the part. Then tighten the two clamping screws on the external thread angle gauge. Next, screw the body of the internal thread angle gauge into the body of the external thread angle gauge so that the positioning surface C of the internal thread angle gauge is in close contact with the positioning surface B of the external thread gauge. Adjust the position of the internal thread positioning sleeve and the angle scale sleeve so that the positioning surface D of the gauge is also in close contact with the positioning surface A of the gauge. Tighten the locking sleeve to fix it. Then loosen the clamping screws on the internal thread angle gauge. Align the 0° mark on the angle scale sleeve with the scale line of the external thread angle gauge (refer to the drawing requirements) for calibration. Finally, tighten the clamping screws to complete the calibration of the internal thread angle gauge.

[0066] b) Screw the calibrated internal thread angle gauge body into the threaded inner hole of the part to be tested, so that the D positioning surface of the gauge is in close contact with the bottom surface of the threaded hole of the part, and read the difference between the angle scale line on the part and the 0° line of the gauge to obtain the adjustment angle difference value of the internal thread finishing.

[0067] 4) Compare the values ​​of the internal and external thread angle gauges to obtain the difference, and calculate the starting angle of the finished thread. The calculation method is: starting angle of the finished thread = angle value of the rough milling internal thread ± angle difference measured by the roughing gauge.

[0068] 5) Based on the calculated finishing angle parameters, adjust the starting point value of the thread machining in the CNC machining program within the finishing allowance range. The calculation method is: Adjustable angle range = ±(single-sided finishing allowance × tan30 × 360 / pitch). If the adjustment exceeds the adjustable angle range, scrap will be generated.

[0069] 6) Measure the dimensional accuracy of the internal thread machining using a thread plug gauge of the appropriate accuracy. The go gauge should pass and the no-go gauge should not. Measure the internal thread assembly angle using a precision internal thread angle gauge. The calibration process and measurement method are the same as those for the roughing internal thread angle gauge, so they will not be repeated here. Note that if the measured angle is out of tolerance, and the 0° line of the gauge is to the right of the angle mark on the part, it cannot be adjusted and the part will be scrapped. If the 0° line of the gauge is to the left of the angle mark on the part, the assembly angle can be slightly adjusted using the following method.

[0070] 7) Minor angle adjustments after finishing, the specific method is as follows:

[0071] i) If the internal thread machining dimensional accuracy is qualified but the assembly angle requirement is not met, the upper side of the thread profile needs to be adjusted. The formula is: Upper side adjustment amount = Minimum angle difference / 360 × Pitch, where: Minimum angle difference refers to the minimum angle amount to move on the current angle deviation to meet the angle range required on the drawing. For example: If the minimum angle difference is 10° and the pitch is 1.5mm, then the upper side adjustment amount = 10 / 360 × 1.5 ≈ 0.042mm, that is, the machine tool Z-axis is raised by 0.042mm before machining;

[0072] If the assembly angle requirement has been met but the thread size accuracy has not been met, the lower side needs to be corrected while ensuring the thread depth. This means that the machine tool Z-axis should be lowered by a certain value before machining. The specific value depends on the actual situation.

[0073] External thread machining process flow chart:

[0074]

[0075] External thread machining process flow chart:

[0076]

[0077]

[0078] The milling process referred to in this utility model includes the commonly known milling process, as well as other processing means that can perform the required thread processing.

[0079] Unless otherwise specified, the preferred and optional technical means disclosed in this utility model can be arbitrarily combined to form several different specific embodiments when one preferred or optional technical means is a further limitation of another technical means.

Claims

1. A male and female thread angle gauge assembly adapted for directional thread inspection, comprising a female thread angle gauge and a male thread angle gauge, the male thread angle gauge provided with a male thread gauge body, the female thread angle gauge provided with a female thread gauge body, characterised in that The outer thread gauge body is cylindrical, the front part of the axial through hole of the outer thread gauge body is provided with an internal thread, the rear part of the axial through hole of the outer thread gauge body is slidably connected with an outer thread positioning sleeve, the outer thread positioning sleeve is provided with a locking mechanism for fixing the outer thread positioning sleeve with the outer thread gauge body, the front end face of the outer thread gauge body constitutes a first positioning face of the outer thread angle gauge, the front end face of the outer thread positioning sleeve constitutes a second positioning face of the outer thread angle gauge, the internal thread gauge body is provided with an external thread, and an internal thread positioning sleeve, an angle scale sleeve and a locking sleeve are sequentially sleeved on the internal thread gauge body in front and back, the internal thread positioning sleeve and the locking sleeve are both provided with an internal thread and are screwed on the internal thread gauge body, the angle scale sleeve is slidably connected with the internal thread gauge body, the front end face of the internal thread gauge body constitutes a first positioning face of the internal thread angle gauge, and the front end face of the internal thread positioning sleeve constitutes a second positioning face of the internal thread angle gauge.

2. The internal and external thread angle gauge assembly of claim 1, wherein The internal thread gauge body is cylindrical, and the front end face thereof is planar and perpendicular to the axis thereof.

3. The internal and external thread angle gauge assembly of claim 1, wherein The front end face of the internal thread positioning sleeve is planar and perpendicular to the axis thereof.

4. The internal and external thread angle gauge assembly of claim 1 wherein The outer side face of the angle scale sleeve is provided with an angle scale.

5. The internal and external thread angle gauge assembly of claim 1 wherein The angle scale sleeve is provided with a locking mechanism for fixing the angle scale sleeve on the internal thread gauge body.

6. The internal and external thread angle gauge assembly of claim 5, wherein The locking mechanism of the angle scale sleeve is a threaded fastening mechanism.

7. The internal and external thread angle gauge assembly of claim 1 wherein The outer thread gauge body is cylindrical, and the front end face thereof is planar and perpendicular to the axis thereof.

8. The internal and external thread angle gauge assembly of claim 1 wherein The front end face of the outer thread positioning sleeve is planar and perpendicular to the axis thereof.

9. The internal and external thread angle gauge assembly of claim 1 wherein The front end of the outer side face of the outer thread gauge body is provided with an angle scale.

10. The internal and external thread angle gauge assembly of claim 1 wherein The locking mechanism of the outer thread positioning sleeve is a threaded fastening mechanism.

Images