A tool for checking the perpendicularity of the axis of a honed hole of a workpiece

Abstract

The utility model discloses a work piece honing hole's axle verticality testing fixture relates to machine tool auxiliary equipment technical field. The work piece honing hole's axle verticality testing fixture, one end of fixed clamping arm is rotatably connected with movable clamping arm, and the movable clamping arm is fixedly connected with the dog on it, is provided with the connecting barrel in the fixed clamping arm, the upper portion fixed connection of connecting barrel has instrument board, the lower portion fixed connection of connecting barrel has connecting piece, and the rotatable connecting of spring shaft has in connecting piece, and the fixed connection of reset spring has in spring shaft, and the fixed connection of inspection rod has below spring shaft, and detection subassembly, and connecting barrel, instrument board, connecting piece, spring shaft, inspection rod form modular clamping fixed with the dog of fixed clamping arm and movable clamping arm, when the detection subassembly appears abrasion because long -term use, such as inspection rod end abrasion, spring shaft elasticity fatigue, instrument board precision drift, only need to rotate movable clamping arm and loosen the dog, can directly take out the whole detection subassembly, and main parts such as support arm, threaded rod do not need to disassemble.

Description

Technical Field

[0001] This utility model relates to the field of machine tool auxiliary equipment technology, and in particular to a tool for checking the perpendicularity of the axis of a workpiece honing hole. Background Technology

[0002] In the field of machining, honing is widely used in the processing of key components such as engine cylinder liners, hydraulic valve holes, and precision bearing seats because it can significantly improve the dimensional accuracy, shape accuracy, and surface roughness of the inner hole of the workpiece. Among them, the perpendicularity of the honing hole axis to the workpiece datum surface is a core form and position tolerance index, which directly affects the assembly accuracy, motion stability, and service life of the parts. If the perpendicularity deviation exceeds the allowable range, it can easily lead to problems such as uneven assembly clearance, motion jamming, and sealing failure, and even cause the failure of the whole machine. Therefore, this index needs to be accurately detected by special inspection tools.

[0003] In mass production scenarios, inspection work needs to meet the requirements of high efficiency and continuous operation. The daily inspection volume can typically reach hundreds to thousands of pieces. As the core functional carrier of the inspection tool, the measurement component must withstand high-frequency insertion, removal, fitting, and deviation sensing cycles, and its wear rate is much higher than that in sporadic inspection scenarios. Specifically, the high-load characteristics of mass measurement directly lead to repeated friction between the inspection rod tip and the workpiece hole wall, causing tip wear and dimensional deviations. The elastic components are subjected to long-term cyclic force, causing elastic coefficient drift and reduced reset accuracy. The sensing elements and display modules experience accuracy drift and data response delay due to continuous signal output. The clamping components undergo fatigue deformation and positioning accuracy decay due to high-frequency opening and closing. These problems cause the measurement accuracy of the measurement component to decline rapidly. If not handled in time, it will directly cause a batch of defective workpieces to flow into subsequent processes, resulting in serious economic consequences such as rework, scrap, assembly failure, and order loss. Therefore, mass production scenarios place extremely high demands on the accuracy maintenance and rapid replacement of measurement components.

[0004] The existing inspection fixtures mostly use welding, multiple sets of bolts, or embedded interference fits for the measuring components and main structure, without independent modular design. When replacing them, it is necessary to disassemble the main and related parts step by step. Replacing a single component is time-consuming and requires special tools such as torque wrenches and Allen wrenches. For tachometer-based production lines, long downtime will lead to work-in-process accumulation and production interruption. In order to avoid capacity loss, companies are often forced to continue testing with components whose accuracy has exceeded the standard, which will cause batch quality risks.

[0005] Therefore, developing a honing hole shaft perpendicularity gauge with rapid clamping and fixing characteristics, enabling rapid replacement of inspection components, precise positioning, and immediate restoration of accuracy, has become a pressing technical challenge in this field. Utility Model Content

[0006] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a workpiece honing hole axis perpendicularity inspection tool that can solve the above-mentioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a workpiece honing hole axis perpendicularity inspection tool, comprising a base, a support foot fixedly connected to the lower part of the base, a three-jaw chuck rotatably connected to the base; a support arm fixedly connected to the rear end of the upper part of the base, a sliding groove opened in the support arm, a threaded rod rotatably connected in the sliding groove, a slider threadedly connected to the threaded rod, and the slider slidingly connected to the sliding groove;

[0008] The base is equipped with a first motor and a second motor. The output end of the first motor is fixedly connected to a three-jaw chuck, and the output end of the second motor is fixedly connected to a threaded rod.

[0009] A connecting arm is fixedly connected to the slider, a fixed clamping arm is fixedly connected to the top of the connecting arm, a movable clamping arm is rotatably connected to one end of the fixed clamping arm, and a pawl is fixedly connected to the movable clamping arm.

[0010] A connecting cylinder is provided in the fixed clamping arm. An instrument panel is fixedly connected to the upper part of the connecting cylinder, and a connecting piece is fixedly connected to the lower part of the connecting cylinder. A spring shaft is rotatably connected in the connecting piece, and an inspection rod is fixedly connected to the lower part of the spring shaft.

[0011] Preferably, the fixed clamping arm has a slot adapted to the clamping claw.

[0012] Preferably, an anti-slip pad is fixedly connected to the bottom of the support leg.

[0013] Preferably, the base has heat dissipation holes.

[0014] Preferably, the fixed clamping arm and the inner side of the movable clamping arm are fixedly connected with anti-slip strips.

[0015] Preferably, the three-jaw chuck has a soft protective pad on the inner side of the jaws.

[0016] Preferably, the cross-section of the slider is a T-shaped structure, and the groove is a T-shaped groove adapted to the slider.

[0017] Preferably, a return spring is sleeved on the outside of the spring shaft.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The workpiece honing hole axis perpendicularity gauge, inspection component, connecting cylinder, instrument panel, connecting parts, spring shaft, and inspection rod are modularly clamped and fixed by the jaws of the fixed clamping arm and the moving clamping arm, rather than being rigidly welded to the main structure such as the connecting arm and the slider or locked with complex bolts. When the inspection component wears due to long-term use, such as wear at the end of the inspection rod, elastic fatigue of the spring shaft, or drift of the instrument panel accuracy, it is only necessary to rotate the moving clamping arm to loosen the jaws, and the entire inspection component can be directly removed without disassembling the main components such as the support arm and the threaded rod, thus avoiding the reference offset or structural damage caused by disassembling the main body.

[0020] 2. The workpiece honing hole axis perpendicularity inspection fixture starts with the second motor. Its output end drives the threaded rod in the slide groove of the support arm to rotate. Since the slider is threadedly connected to the threaded rod and slides in the slide groove, the rotational motion of the threaded rod is converted into the vertical linear motion of the slider along the slide groove. The slider drives the fixed clamping arm, the movable clamping arm and the entire set of inspection components, the connecting cylinder, the instrument panel, the connecting parts, the spring shaft and the inspection rod to rise and fall synchronously until the lower end of the inspection rod is inserted into the honing hole of the workpiece, and the inspection rod is in contact with the inner wall of the honing hole. During this period, the clamping angle of the chuck can be adjusted by rotating the movable clamping arm to help fix the radial position of the inspection rod and avoid deviation in the non-inspection direction during the inspection process. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of a workpiece honing hole perpendicularity inspection tool according to the present invention.

[0023] Figure 2 This is a schematic diagram of a workpiece honing hole perpendicularity inspection tool according to the present invention.

[0024] Figure 3 This is a cross-sectional schematic diagram of a workpiece honing hole perpendicularity inspection fixture according to the present invention.

[0025] Figure 4 This is a cross-sectional schematic diagram of a workpiece honing hole perpendicularity inspection tool according to the present invention.

[0026] Reference numerals in the attached diagram: 1. Base; 2. Support leg; 3. Support arm; 4. Slide groove; 5. Threaded rod; 6. Three-jaw chuck; 7. First motor; 8. Second motor; 9. Slider; 10. Connecting arm; 11. Heat dissipation hole; 12. Connecting cylinder; 13. Instrument panel; 14. Connecting piece; 15. Spring shaft; 16. Inspection rod; 17. Fixed clamping arm; 18. Moving clamping arm; 19. Jaw. Detailed Implementation

[0027] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Please see Figure 1-4 This utility model provides a technical solution: a workpiece honing hole axis perpendicularity inspection tool, including a base 1, a support leg 2 fixedly connected to the bottom of the base 1, a three-jaw chuck 6 rotatably connected to the base 1, an anti-slip pad fixedly connected to the bottom of the support leg 2, a heat dissipation hole 11 opened at the rear end of the base 1, and a soft protective pad fixedly connected to the inner side of the jaws of the three-jaw chuck 6.

[0032] The workpiece to be inspected is placed on the three-jaw chuck 6 of the base 1. The radial clamping action of the three-jaw chuck 6 makes the workpiece coaxially fixed on the upper surface of the base 1, ensuring that the rotation center of the workpiece coincides with the rotation center of the three-jaw chuck 6, providing a stable reference for subsequent perpendicularity inspection.

[0033] A support arm 3 is fixedly connected to the rear end of the base 1. A slide groove 4 is opened in the support arm 3. A threaded rod 5 is rotatably connected in the slide groove 4. A slider 9 is threadedly connected to the threaded rod 5. The slider 9 is slidably connected to the slide groove 4.

[0034] The base 1 is equipped with a first motor 7 and a second motor 8. The output end of the first motor 7 is fixedly connected to the three-jaw chuck 6, and the output end of the second motor 8 is fixedly connected to the threaded rod 5.

[0035] A connecting arm 10 is fixedly connected to the slider 9. A fixed clamping arm 17 is fixedly connected to the top of the connecting arm 10. A movable clamping arm 18 is rotatably connected to one end of the fixed clamping arm 17. A pawl 19 is fixedly connected to the movable clamping arm 18. Anti-slip strips are fixedly connected to the inner sides of the fixed clamping arm 17 and the movable clamping arm 18.

[0036] A connecting cylinder 12 is provided in the fixed clamping arm 17. An instrument panel 13 is fixedly connected to the upper part of the connecting cylinder 12. A connecting piece 14 is fixedly connected to the lower part of the connecting cylinder 12. A spring shaft 15 is rotatably connected in the connecting piece 14. A return spring is fixedly connected to the spring shaft 15. An inspection rod 16 is fixedly connected to the lower part of the spring shaft 15.

[0037] The inspection rod 16 is rotatably connected to the connector 14 via the spring shaft 15. The spring shaft 15 has elastic reset characteristics, which allows the inspection rod 16 to always be in contact with the inner wall of the honing hole. When there is a perpendicularity deviation in the honing hole axis, the radial displacement of the inner wall of the hole during the workpiece rotation will push the inspection rod 16 to swing slightly around the spring shaft 15. This swing is transmitted to the upper connecting cylinder 12 through the connector 14, and then converted into a mechanical displacement signal inside the connecting cylinder 12.

[0038] Working principle: The workpiece to be tested is placed on the three-jaw chuck 6 of the base 1. Through the radial clamping action of the three-jaw chuck 6, the workpiece is coaxially fixed on the upper surface of the base 1, ensuring that the rotation center of the workpiece coincides with the rotation center of the three-jaw chuck 6, providing a stable reference for subsequent perpendicularity testing. The protective pads on the inner side of the jaws of the three-jaw chuck 6 protect the workpiece.

[0039] The second motor 8 is started, and its output end drives the threaded rod 5 in the slide groove 4 of the support arm 3 to rotate. Since the slider 9 is threadedly connected to the threaded rod 5 and slides in the slide groove 4, the rotational motion of the threaded rod 5 is converted into the vertical linear motion of the slider 9 along the slide groove 4. The slider 9 drives the fixed clamping arm 17, the movable clamping arm 18 and the entire set of detection components, the connecting cylinder 12, the instrument panel 13, the connecting piece 14, the spring shaft 15 and the inspection rod 16 to rise and fall synchronously until the lower end of the inspection rod 16 is inserted into the honing hole of the workpiece and the inspection rod 16 is in contact with the inner wall of the honing hole. During this period, the clamping angle of the chuck 19 can be adjusted by rotating the movable clamping arm 18 to help fix the radial position of the inspection rod 16 and avoid deviation in the non-detection direction during the detection process.

[0040] Start the first motor 7, whose output end directly drives the three-jaw chuck 6 to make the workpiece rotate at a constant speed around its own axis. Due to the perpendicularity deviation between the workpiece honing hole axis and the reference surface, the upper surface of the base 1, the inner wall of the hole will generate a periodic radial force on the inspection rod 16 during the rotation.

[0041] The inspection rod 16 is rotatably connected to the connector 14 via the spring shaft 15. The spring shaft 15 has elastic reset characteristics, which allows the inspection rod 16 to always be in contact with the inner wall of the honing hole. When there is a perpendicularity deviation in the honing hole axis, the radial displacement of the inner wall of the hole during the workpiece rotation will push the inspection rod 16 to swing slightly around the spring shaft 15. This swing is transmitted to the upper connecting cylinder 12 through the connector 14, and then converted into a mechanical displacement signal inside the connecting cylinder 12.

[0042] The instrument panel 13 above the connecting cylinder 12 is connected to the internal mechanical structure, converting the mechanical displacement signal received by the connecting cylinder 12 into a readable value or pointer deflection angle. The reading of the instrument panel 13 directly reflects the perpendicularity deviation of the honing hole shaft. When the reading is zero, it indicates that the perpendicularity meets the requirements. When the reading exceeds the set threshold, it indicates that the workpiece is unqualified.

[0043] After the inspection is completed, the first motor 7 and the second motor 8 are turned off, the three-jaw chuck 6 is released to remove the workpiece, and the second motor 8 drives the slider 9 to reset the inspection component, thus completing a single inspection cycle.

[0044] The testing assembly, including the connecting cylinder 12, instrument panel 13, connector 14, spring shaft 15, and inspection rod 16, is modularly clamped and fixed by the fixed clamping arm 17 and the jaws 19 of the movable clamping arm 18, rather than being rigidly welded to the main structure such as the connecting arm 10 and the slider 9 or locked with complex bolts. When the testing assembly wears down due to long-term use, such as wear at the end of the inspection rod 16, elastic fatigue of the spring shaft 15, or drift in the accuracy of the instrument panel 13, the entire testing assembly can be directly removed by simply rotating the movable clamping arm 18 to loosen the jaws 19, without having to disassemble the main components such as the support arm 3 and the threaded rod 5, thus avoiding reference offset or structural damage caused by disassembling the main body.

[0045] The connection reference of the detection component, the contact surface of the fixed clamping arm 17, and the clamping positioning point of the jaw 19 adopt a standardized design. This not only allows for quick replacement of spare detection components of the same specification, restoring accuracy through direct replacement, but also enables adaptation to special detection components with different apertures and different detection accuracy requirements. For example, replacing the longer inspection rod 16 or the higher precision instrument panel 13 does not require modification of the main body of the fixture. When the accuracy of a certain type of detection component decreases, the corresponding module can be replaced specifically without replacing the entire fixture, reducing maintenance costs while ensuring the consistency of accuracy for each type of detection task.

[0046] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A workpiece honing hole axial perpendicularity inspection fixture, comprising a base (1), characterized in that: A support leg (2) is fixedly connected to the bottom of the base (1), and a three-jaw chuck (6) is rotatably connected to the base (1). A support arm (3) is fixedly connected to the rear end of the base (1). A sliding groove (4) is provided in the support arm (3). A threaded rod (5) is rotatably connected in the sliding groove (4). A slider (9) is threadedly connected to the threaded rod (5), and the slider (9) is slidably connected to the sliding groove (4). The base (1) is equipped with a first motor (7) and a second motor (8) respectively. The output end of the first motor (7) is fixedly connected to the three-jaw chuck (6), and the output end of the second motor (8) is fixedly connected to the threaded rod (5). A connecting arm (10) is fixedly connected to the slider (9), a fixed clamping arm (17) is fixedly connected to the top end of the connecting arm (10), a movable clamping arm (18) is rotatably connected to one end of the fixed clamping arm (17), and a pawl (19) is fixedly connected to the movable clamping arm (18). A connecting cylinder (12) is provided in the fixed clamp arm (17). An instrument panel (13) is fixedly connected above the connecting cylinder (12). A connector (14) is fixedly connected below the connecting cylinder (12). A spring shaft (15) is rotatably connected in the connector (14). An inspection rod (16) is fixedly connected below the spring shaft (15).

2. The workpiece honing hole axial perpendicularity inspection tool according to claim 1, characterized in that: The fixed clamping arm (17) is provided with a slot that matches the chuck.

3. The workpiece honing hole axial perpendicularity inspection tool according to claim 2, characterized in that: An anti-slip pad is fixedly connected to the bottom of the support leg (2).

4. The workpiece honing hole axial perpendicularity inspection tool according to claim 3, characterized in that: The base (1) has heat dissipation holes (11).

5. The workpiece honing hole axial perpendicularity inspection tool according to claim 4, characterized in that: The fixed clamping arm (17) and the moving clamping arm (18) are fixedly connected to the inner side of the anti-slip strip.

6. The workpiece honing hole axial perpendicularity inspection tool according to claim 5, characterized in that: The three-jaw chuck (6) has soft protective pads on the inner side of the jaws.

7. The workpiece honing hole axial perpendicularity inspection tool according to claim 6, characterized in that: The cross-section of the slider (9) is a T-shaped structure, and the groove (4) is a T-shaped groove adapted to the slider (9).

8. The workpiece honing hole axial perpendicularity inspection tool according to claim 7, characterized in that: A return spring is sleeved on the outside of the spring shaft (15).

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