Universal machine slot detection jig

Abstract

The utility model discloses a general type machine adds groove detection tool, including mounting bracket, horizontal detection stage, measuring table, locking bolt and replaceable detection head subassembly. Horizontal detection stage is fixed on mounting bracket, has the detection end face of level, and the center is equipped with through -hole, and the side wall is equipped with locking screw hole. The shaft sleeve of measuring table is from below and can slide up and down, and the detection rod front end protrudes detection end face and is connected detection head. Locking bolt is used for locking the position of shaft sleeve. Detection head subassembly contains at least round head and sharp head two models, and can dismantle replacement. Still include correction flat plate, is used for zero before measurement. The tool gathers groove depth and groove bottom flatness detection in an organic whole, and through replacing detection head and adjusting the height of measuring table, adapts to different groove type, cooperates with anti -rotation guide rail and replaceable wear -resistant board, realizes high accuracy, high efficiency, high universality detection, reduces operation difficulty and comprehensive cost.

Description

Technical Field

[0001] This utility model relates to the field of processing and testing fixtures, and in particular to a general-purpose machining groove testing fixture. Background Technology

[0002] In industries such as machinery manufacturing, automotive parts, and mold making, the depth of grooves on workpieces and the flatness of their bottom surfaces are critical dimensions affecting assembly accuracy and performance. Traditional depth measurement often relies on handheld tools such as depth calipers, requiring operators to manually align the reference surface for measurement. This method is highly susceptible to human error, resulting in poor repeatability of measurement results, making it difficult to meet the quality control requirements of mass production, and also has low inspection efficiency. For inspecting the flatness of the groove bottom, an alternative method is typically required, such as using a dedicated platform with a lever dial indicator or a coordinate measuring machine (CMM). This means that two different sets of equipment and two independent operating procedures are needed to complete the measurement of the two key indicators of the same groove, increasing inspection time, equipment costs, and operational complexity. Furthermore, for specific groove types or dimensions, factories often manufacture dedicated limit plug gauges or single-function inspection fixtures. These fixtures can only perform single-item measurements, cannot obtain specific numerical values, and become obsolete once the product changes, leading to high fixture management costs.

[0003] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a general-purpose machining groove inspection fixture to solve the above problems.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solution of this utility model and for the convenience of those skilled in the art to understand it. It should not be assumed that the above content is known to those skilled in the art simply because it has been described in the background section of this utility model. Utility Model Content

[0005] To overcome the shortcomings of the prior art, the present invention aims to disclose a universal machining groove inspection fixture.

[0006] This utility model discloses a general-purpose machined groove inspection fixture, comprising:

[0007] Mounting rack;

[0008] A horizontal testing table is fixedly mounted on a mounting frame. The horizontal testing table has a horizontal testing end face and a through hole is provided in a direction perpendicular to the testing end face. The side wall of the through hole is provided with a locking thread hole.

[0009] The gauge includes a bushing and a detection rod slidably disposed within the bushing. The bushing is inserted from the opposite side of the detection end face and slidably disposed within the through hole. The front end of the detection rod extends from one side of the detection end face and forms the detection end.

[0010] Locking bolts, screwed into locking threaded holes, are used to adjustably lock the bushing in different positions within the through hole;

[0011] A replaceable inspection head assembly includes at least two different types of inspection heads, which are detachably connected to the front end of the inspection rod. This adapts to different inspection scenarios such as wide flat grooves, narrow slits, and V-shaped apex points.

[0012] A preferred technical solution further includes a calibration plate, which can be placed on the detection end face and cover the through hole. This plate is used to press the detection head to a position theoretically flush with the detection end face before measurement, enabling a quick and accurate zeroing operation of the gauge and ensuring the consistency of the measurement reference.

[0013] Preferred technical solution: The replaceable detection head assembly includes a round-headed detection head for detecting planar grooves and a pointed detection head for detecting narrow slots or positioning points. It can be replaced with a simple screw-on rotation.

[0014] Preferred technical solution: The mounting frame includes a base and a support structure mounted on the base, with a horizontal measuring platform mounted on top of the support structure. This provides space for the installation of the gauge.

[0015] Preferred technical solution: The detection end face is a detachable wear-resistant plate. This wear-resistant plate serves as a consumable and protective component, and can be replaced individually after wear.

[0016] Preferred technical solution: The gauge is a dial indicator. It provides high-precision displacement measurement readings.

[0017] Preferred technical solution: The inner wall of the through hole is provided with a linear guide structure, and the outer circumference of the bushing is provided with a groove that mates with the linear guide structure. This structure can effectively prevent the bushing from rotating within the through hole, ensuring that the movement direction of the detection rod is strictly perpendicular to the detection end face, thereby improving measurement stability and repeatability.

[0018] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0019] This invention integrates absolute groove depth measurement and groove bottom relative flatness assessment into a single fixture. Users only need to perform a single clamping setup to sequentially complete the testing of these two key indicators, simplifying the process and significantly improving efficiency. By providing a high-precision testing end face and combining it with electronic or mechanical gauges, human error in alignment is eliminated from a hardware perspective. The use of a calibration plate for rapid zeroing and an anti-rotation linear guide design ensures high stability during the measurement process, resulting in accurate measurement data and good consistency across different operators and time periods. The "replaceable testing head" and "adjustable gauge height" design are the core of this fixture's versatility. By changing the testing head to different shapes (such as round or pointed heads) and adjusting the initial position of the gauge, one fixture can handle groove testing of various shapes and depths, achieving a leap from specialized to general-purpose, significantly reducing overall testing costs. It also greatly reduces operational difficulty. Without complex debugging and experience-based judgment, ordinary inspectors can quickly and accurately complete the testing, which is conducive to the standardization of quality control standards. The inspection end face is a detachable wear-resistant plate, which can be replaced individually after wear, extending the overall service life of the fixture. It is easy to maintain and inexpensive. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a general-purpose machined groove testing fixture according to the present invention.

[0022] In the above attached diagrams, 1 is the mounting bracket; 11 is the base; 12 is the support structure; 2 is the horizontal testing platform; 21 is the testing end face; 22 is the through hole; 23 is the locking threaded hole; 24 is the locking bolt; 3 is the gauge; 31 is the bushing; 32 is the testing rod; 33 is the testing head assembly; and 4 is the calibration plate. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and their synonyms, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] In this application, the terms "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this utility model and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0027] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," "fitting," and "fitting" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Similarly, "fitting" can mean completely or partially fitted. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Example:

[0030] like Figure 1 As shown, this utility model discloses a universal machined groove inspection fixture. The main components of this utility model will be described in detail below:

[0031] A sturdy mounting bracket 1 made of cast iron includes a base 11 and a support structure 12 vertically fixed thereon.

[0032] The horizontal testing platform 2 is fixed to the top of the support structure 12 by bolts. The upper surface of the horizontal testing platform 2 is precision ground to form a smooth, horizontal testing end face 21. It is also a detachable wear-resistant plate, which can be easily replaced after wear. The center of the horizontal testing platform 2 is machined with a precision round hole as a through hole 22, and its side wall has radially opened locking thread holes 23.

[0033] In this embodiment, a mechanical dial indicator is used for gauge 3. The bushing 31 of gauge 3 is inserted into the through hole 22 from below the horizontal testing platform 2, with a clearance fit allowing the bushing 31 to slide up and down. The testing rod 32 of gauge 3 passes through the center of the bushing 31, with its top end extending above the testing end face 21. A locking bolt 24 is screwed into the locking threaded hole 23. When it is necessary to fix the height of gauge 3, tighten the bolt 24 so that its end presses against the outer wall of the bushing 31.

[0034] The replaceable detection head assembly 33 includes various detection heads. It primarily uses hemispherical round-head detection heads and conical pointed-head detection heads; in this embodiment, it uses hemispherical round-head detection heads. The tails of these detection heads can be directly screwed onto the front end of the detection rod 32 for quick replacement.

[0035] In addition, this utility model is equipped with a high-precision calibration plate 4. The bottom surface of the plate is ground to achieve extremely high flatness, and its size is larger than the opening of the through hole 22, so that it can completely cover and be placed stably on the detection end face 21.

[0036] To further improve guiding accuracy, an axial groove is machined on the inner wall of the through hole 22 as a linear guide structure, while a precisely fitted protrusion is embedded on the outer wall of the bushing 31 as a sliding groove. This structure ensures that the bushing 31 can only move in the vertical direction, completely eliminating the possibility of rotation.

[0037] Working principle:

[0038] Depth Measurement: Select and install the appropriate measurement head. Place the calibration plate 4 on the measurement end face 21, press the measurement head down until it is aligned with the measurement end face 21, adjust the height of the dial indicator 3, and zero the dial indicator at this position. Remove the calibration plate 4, place the workpiece reference surface on the measurement end face 21, and let the measurement head fall to the bottom of the groove to be measured. The dial indicator reading at this time is the groove depth. When changing the workpiece for measurement, simply place the new workpiece reference surface on the measurement end face 21, let the measurement head fall to the bottom of the groove to be measured, and the dial indicator reading at this time is the groove depth of the new workpiece. No readjustment of the dial indicator is required.

[0039] Flatness inspection: Place the inspection head at a point on the bottom of the groove and zero it. Keeping the fixture stationary, move the workpiece horizontally so that the inspection head contacts other points on the bottom of the groove. Record the difference in the dial indicator readings at each point. This sequence of differences reflects the flatness of the groove bottom surface. It should be noted that the flatness inspection of this invention is mainly for continuous planes machined by CNC, where the flatness variation is continuous rather than randomly distributed.

[0040] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A general-purpose machined groove testing fixture, characterized in that, include: Mounting rack; A horizontal testing platform is fixedly mounted on the mounting frame. The horizontal testing platform has a horizontal testing end face and a through hole is provided in a direction perpendicular to the testing end face. The side wall of the through hole is provided with a locking thread hole. The gauge includes a bushing and a detection rod slidably disposed within the bushing. The bushing is inserted from the opposite side of the detection end face and slidably disposed within the through hole. The front end of the detection rod extends from one side of the detection end face and forms a detection end. A locking bolt is screwed into the locking threaded hole to adjustably lock the bushing at different positions within the through hole; A replaceable detection head assembly comprising at least two different models of detection heads, the detection heads being detachably connected to the front end of the detection rod.

2. The universal machined groove testing fixture according to claim 1, characterized in that: It also includes a calibration plate that can be placed on the detection end face and cover the through hole.

3. The universal machined groove testing fixture according to claim 1, characterized in that: The replaceable detection head assembly includes a round-headed detection head for detecting planar grooves and a pointed detection head for detecting slots or positioning points.

4. The universal machined groove testing fixture according to claim 1, characterized in that: The mounting frame includes a base and a support structure disposed on the base, and the horizontal testing platform is mounted on the top of the support structure.

5. The universal machined groove testing fixture according to claim 1, characterized in that: The detection end face is detachably covered with a wear-resistant plate.

6. The universal machined groove inspection fixture according to claim 1, characterized in that: The scale mentioned is a per mille scale.

7. The universal machined groove testing fixture according to claim 1, characterized in that: The inner wall of the through hole is provided with a linear guide structure, and the outer periphery of the bushing is provided with a sliding groove that mates with the linear guide structure.

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