Tool for detecting rigidity of disc spring of oscillating main shaft

Abstract

The utility model discloses a tool for detecting rigidity of a disc spring of a swinging head main shaft, which relates to the technical field of measuring tools and comprises a base plate, a central groove is arranged in the middle of the base plate, a central hole penetrating through the base plate is arranged in the middle of the central groove, and a gasket for placing the disc spring is arranged in the central groove. A center hole is formed in the base plate, a pulling assembly used for applying pulling force to the disc spring is arranged below the center hole, hanging ring assemblies used for hanging the base plate are arranged at the four corners of the base plate, a connecting cylinder base is arranged on one side of the base plate, and an inner rotating block is rotationally connected into the connecting cylinder base. Based on the principle of'gravity loading-deformation measurement ', a standard weight is hung to enable the disc spring to be stressed, then the compression amount of the disc spring is measured and compared with a theoretical value, whether the rigidity of the disc spring is normal or not can be visually and accurately judged, the technical bottleneck that faults of the disc spring are difficult to check is effectively solved, and the performance state of the disc spring is clear at a glance.

Description

Technical Field

[0001] This utility model relates to the field of measuring tool technology, specifically a tool for testing the stiffness of a oscillating head spindle disc spring. Background Technology

[0002] In modern machining, the swivel head is a commonly used accessory for gantry machining centers. After the swivel head is installed on the machine tool, the cutting tool is installed in the BT50 tapered hole at the front end of the swivel head spindle. The spindle of the swivel head uses a disc spring as the core component for tool tensioning. The elastic deformation of the disc spring generates tension force to ensure that the tool maintains precise positioning during high-speed rotation machining. According to industry standards and actual machining requirements, the tension force provided by the disc spring must be strictly controlled within the range of 1500-1800 kgf. Excessive tension will cause excessive wear on the contact surface between the tool and the spindle, affecting machining accuracy; insufficient tension may cause the tool to loosen, or even cause a safety accident. Therefore, accurate testing of the disc spring performance is an important part of spindle maintenance.

[0003] When the spindle pull force is abnormal, maintenance personnel need to adjust or troubleshoot the disc spring assembly. However, as a standard elastic element, the performance abnormality of the disc spring is often concealed: fatigue damage to a single disc spring cannot be directly determined by visual inspection, and conventional measuring tools can only measure the outer diameter, thickness, and free height of the disc spring, but cannot obtain its core performance parameter—stiffness (i.e., the amount of deformation of the disc spring under a specific load). Abnormal stiffness is the main cause of unstable pull force. For example, problems such as plastic deformation of the disc spring due to long-term load, defects in heat treatment processes, or material fatigue can all cause its actual stiffness to deviate from the design value, thereby affecting the accuracy of the spindle pull force.

[0004] Current industrial testing methods mainly rely on specialized equipment such as spring compression testing machines and stiffness testing machines. While these devices can accurately measure the load-deformation curves of disc springs, they have significant limitations: First, the equipment is bulky and heavy, requiring fixed installation in laboratories or specialized testing locations, making it unsuitable for rapid on-site troubleshooting during disc spring adjustments; second, the cost of a single unit is generally over several hundred thousand yuan, and operation requires the participation of professional technicians, making frequent use of such equipment for routine maintenance uneconomical for small and medium-sized processing enterprises; third, the testing process is complex, requiring the disassembly of the disc spring assembly and transportation to the testing location, which prolongs the disc spring adjustment time and affects production efficiency.

[0005] Troubleshooting oscillating spindles is typically "on-site": technicians need to locate the problem quickly to avoid production interruptions due to excessive testing time. Therefore, we provide an oscillating spindle disc spring stiffness testing tool to address the aforementioned issues. Utility Model Content

[0006] The purpose of this invention is to provide a tool for testing the stiffness of the spindle disc spring of a swivel head, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A tool for testing the stiffness of a spindle disc spring includes a base plate. A central groove is formed in the middle of the base plate, and a central hole is formed in the center of the central groove. A shim for placing the disc spring is provided in the central groove. A pulling assembly for applying tension to the disc spring is provided below the central hole. Each of the four corners of the base plate is provided with a lifting ring assembly for suspending the base plate. A connecting sleeve is provided on one side of the base plate. An inner rotating block is rotatably connected to the connecting sleeve. A rectangular measuring rod is fixedly connected to the upper end of the inner rotating block. A measuring assembly for detecting the deformation of the disc spring is provided on the rectangular measuring rod.

[0009] As a further embodiment of this utility model: the pulling assembly includes a connecting sleeve, both ends of which are provided with internal threads. A second eye bolt is connected to the internal thread at the lower end of the connecting sleeve, and the internal thread at the upper end of the connecting sleeve is connected to the threaded head at the bottom of the pull rod.

[0010] As a further embodiment of this utility model: the lifting eye assembly includes threaded holes, which are respectively opened at the four corners of the base plate, and each threaded hole is threaded with a first lifting eye screw.

[0011] As a further embodiment of this utility model: the measuring component includes a measuring sleeve, which is slidably connected to a rectangular measuring rod, and an L-shaped measuring rod is fixedly connected to one side of the measuring sleeve.

[0012] As a further improvement of this utility model: the upper end of the rectangular measuring rod is fixedly connected to a limiting slider, and the limiting slider is slidably connected to the L-shaped measuring rod.

[0013] As a further improvement of this utility model, the surface of the rectangular measuring rod is engraved with scale markings.

[0014] As a further improvement of this utility model, the four corners of the substrate are all rounded.

[0015] As a further improvement of this utility model: a flange is fixedly connected to the lower end of the connecting cylinder seat, and the flange is fixed to the base plate with screws.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model is based on the principle of "gravity loading-deformation measurement". By suspending a standard weight to subject the disc spring to force, and then measuring its compression and comparing it with the theoretical value, it can intuitively and accurately determine whether the stiffness of the disc spring is normal. It effectively solves the technical bottleneck of difficult disc spring fault diagnosis and makes the performance status of the disc spring clear at a glance.

[0018] 3. With its compact and portable design, this utility model tool can be used directly on-site. It has low manufacturing costs, which greatly reduces the testing costs for enterprises. It is also easy to operate, and debugging personnel can get started after simple training. The testing time for a single disc spring can be controlled within 10 minutes, which greatly improves the efficiency of troubleshooting. It successfully breaks through the multiple limitations of professional testing equipment in terms of usage scenarios, cost and efficiency.

[0019] 4. This utility model directly simulates the force direction and load form of the disc spring in the spindle, making the measurement process closer to the actual working conditions. It effectively avoids errors caused by the difference between the laboratory testing environment and the on-site working conditions, ensuring that the test results truly reflect the performance of the disc spring in actual work. It realizes the accurate detection of disc spring stiffness on the oscillating head debugging site, and provides reliable technical support for the efficient maintenance of the oscillating head spindle. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the broaching mechanism inside the oscillating head spindle.

[0021] Figure 2 This is a schematic diagram of the structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the bottom structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the substrate structure in this utility model.

[0024] Figure 5 This is a schematic diagram of the disassembled structure of the pull component in this utility model.

[0025] Figure 6 This is a cross-sectional view of the substrate and gasket in this utility model.

[0026] The components are: 1. Base plate; 2. First eye bolt; 3. Disc spring; 4. L-shaped measuring rod; 5. Limiting slider; 6. Rectangular measuring rod; 7. Measuring sleeve; 8. Inner rotating block; 9. Connecting sleeve seat; 10. Washer; 11. Second eye bolt; 12. Center hole; 13. Connecting sleeve; 14. Center groove; 15. Threaded hole; 16. Internal thread; 17. Scale graduations; 18. Pull rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-6 In this embodiment of the utility model, a tool for testing the stiffness of a spindle disc spring includes a base plate 1. The four corners of the base plate 1 are rounded, and the rounded corners can prevent injury to workers when they accidentally bump into them.

[0029] In this application, the broaching mechanism inside the oscillating head spindle mainly consists of a disc spring 3 and a pull rod 18. Limiting plates are provided at both ends of the pull rod 18, allowing the disc spring 3 to be compressed when the pull rod 18 is subjected to tension. The lower end of the pull rod 18 is equipped with a threaded head for connection, as follows: Figure 1 As shown, when the spindle is in the drawbar state, the drawbar 18 will be subjected to the drawbar force in the direction of the arrow in the figure. Affected by this drawbar force, the disc spring 3 will be compressed. Different drawbar forces correspond to different compression amounts of the disc spring 3.

[0030] A central groove 14 is provided in the middle of the substrate 1, and a central hole 12 is provided in the center of the central groove 14, penetrating the substrate 1. A washer 10 for placing the disc spring 3 is provided in the central groove 14. A pulling assembly for applying tension to the disc spring 3 is provided below the central hole 12. The pulling assembly includes a connecting sleeve 13. Both ends of the connecting sleeve 13 are provided with internal threads 16. A second eye screw 11 is connected to the internal thread 16 at the lower end of the connecting sleeve 13. The internal thread 16 at the upper end of the connecting sleeve 13 is connected to the threaded head at the bottom of the pull rod 18. When pulling, the upper end of the connecting sleeve 13 is connected to the threaded head at the lower end of the pull rod 18 through the internal thread 16, and then the second eye screw 11 is connected to the lower end of the connecting sleeve 13. During testing, an object of a specific weight can be suspended on the second eye screw 11 so that the disc spring 3 bears a constant gravitational load in the vertical direction, simulating the force state when the spindle is tightening the tool.

[0031] Each of the four corners of the substrate 1 is provided with a lifting ring assembly for suspending the substrate 1. The lifting ring assembly includes a threaded hole 15, which is respectively opened at the four corners of the substrate 1. A first lifting ring screw 2 is threaded into each of the threaded holes 15. In use, the first lifting ring screw 2 is connected into the threaded hole 15, and then the crane can smoothly lift the substrate 1 through the four first lifting ring screws 2.

[0032] A connecting sleeve 9 is provided on one side of the base plate 1. An inner rotating block 8 is rotatably connected inside the connecting sleeve 9. A rectangular measuring rod 6 is fixedly connected to the upper end of the inner rotating block 8. A measuring component for detecting the deformation of the disc spring 3 is provided on the rectangular measuring rod 6. The measuring component includes a measuring sleeve 7, which is slidably connected to the rectangular measuring rod 6. An L-shaped measuring rod 4 is fixedly connected to one side of the measuring sleeve 7. A limit slider 5 is fixedly connected to the upper end of the rectangular measuring rod 6, and the limit slider 5 is slidably connected to the L-shaped measuring rod 4. The surface of the rectangular measuring rod 6... The surface is engraved with scale graduations 17; the lower end of the connecting cylinder seat 9 is fixedly connected to a flange, which is fixed to the base plate 1 with screws; the deformation of the disc spring 3 before and after being subjected to force can be measured by the sliding measuring sleeve 7 and the L-shaped measuring rod 4, which are provided and work together with the scale graduations 17; the inner rotating block 8 can rotate inside the connecting cylinder seat 9, so that when loading or removing the disc spring 3 and the pull rod 18, the L-shaped measuring rod 4 can be turned to one side, so that the L-shaped measuring rod 4 is not above the center hole 12, thereby facilitating the loading and removal of the disc spring 3 and the inner rotating block 8.

[0033] The working principle of this utility model is as follows: When in use, the first eye screw 2 is installed into the threaded hole 15 on the base plate 1, then the washer 10 is placed into the center groove 14, the puller mechanism is taken out from the swing head spindle, kept in its original state, and placed on the washer 10. The pull rod 18 of the puller mechanism passes through the center hole 12, and the connecting sleeve 13 is installed into the threaded head at the lower end of the pull rod 18 by threads. The second eye screw 11 is installed into the lower end of the connecting sleeve 13 by threads.

[0034] During measurement, a crane is used to smoothly lift the base plate 1 using the first eye bolt 2. The puller mechanism placed on the pad 10 is visually inspected to ensure it is vertical and without significant tilt. Then, a pre-weighed object is hung on the second eye bolt 11, causing the disc spring 3 to bear a constant gravitational load in the vertical direction, simulating the force state when the spindle is tightening the tool. At this time, the weight of the object will compress the disc spring 3. Then, the L-shaped measuring rod 4 is slid to the top of the pull rod 18, and the value on the scale 17 is recorded to obtain the height of the disc spring 3 after compression. Then, the weight is removed, allowing the disc spring 3 to return to its free state. The L-shaped measuring rod 4 is then slid to the top of the pull rod 18 again, and the value on the scale 17 is recorded to obtain the height of the disc spring 3 in its free state. The actual compression of the disc spring 3 is obtained by subtracting the two height values. Then, the theoretical compression of the disc spring 3 is calculated based on the weight of the object. If the theoretical compression and the actual compression are consistent, it indicates that the disc spring is not faulty. If they are inconsistent, it indicates that the stiffness of the disc spring 3 is problematic.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Although this specification describes embodiments, not every embodiment contains only one technical solution. This method of description is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tool for testing the stiffness of a spindle disc spring, comprising a base plate (1), characterized in that: The substrate (1) has a central groove (14) in the middle, and a central hole (12) through the substrate (1) is provided in the center of the central groove (14). A pad (10) for placing the disc spring (3) is provided in the central groove (14). A pulling component for applying tension to the disc spring (3) is provided below the central hole (12). A hanging ring component for suspending the substrate (1) is provided at each of the four corners of the substrate (1). A connecting cylinder seat (9) is provided on one side of the substrate (1). An inner rotating block (8) is rotatably connected in the connecting cylinder seat (9). A rectangular measuring rod (6) is fixedly connected to the upper end of the inner rotating block (8). A measuring component for detecting the deformation of the disc spring (3) is provided on the rectangular measuring rod (6).

2. The tool for testing the stiffness of a spindle disc spring according to claim 1, characterized in that, The pulling assembly includes a connecting sleeve (13), both ends of which are provided with internal threads (16). A second eye bolt (11) is connected to the internal thread (16) at the lower end of the connecting sleeve (13), and the internal thread (16) at the upper end of the connecting sleeve (13) is connected to the threaded head at the bottom of the pull rod (18).

3. The tool for testing the stiffness of a spindle disc spring according to claim 1, characterized in that, The lifting eye assembly includes threaded holes (15), which are respectively opened at the four corners of the base plate (1), and each threaded hole (15) is threaded with a first lifting eye screw (2).

4. The tool for testing the stiffness of a spindle disc spring according to claim 1, characterized in that, The measuring assembly includes a measuring sleeve (7), which is slidably connected to a rectangular measuring rod (6), and an L-shaped measuring rod (4) is fixedly connected to one side of the measuring sleeve (7).

5. The tool for testing the stiffness of a swivel spindle disc spring according to claim 4, characterized in that, The upper end of the rectangular measuring rod (6) is fixedly connected to a limiting slider (5), and the limiting slider (5) is slidably connected to the L-shaped measuring rod (4).

6. The tool for testing the stiffness of a swivel spindle disc spring according to claim 4, characterized in that, The rectangular measuring rod (6) has scale markings (17) engraved on its surface.

7. The tool for testing the stiffness of a spindle disc spring according to claim 1, characterized in that, The four corners of the substrate (1) are all rounded.

8. The tool for testing the stiffness of a spindle disc spring according to claim 1, characterized in that, The lower end of the connecting cylinder seat (9) is fixedly connected to a flange, which is fixed to the base plate (1) with screws.

Images