Rigidity measuring clamp of mechanical main shaft

Abstract

The utility model discloses a rigidity measuring clamp for a mechanical main shaft, which relates to the technical field of main shaft detection and comprises symmetrically arranged main shaft supports, a mechanical main shaft is fixed on the upper portions of the main shaft supports, the end portion of the mechanical main shaft is connected with a frame body structure, and a rigidity measuring sensing component is movably arranged in the frame body structure. And the end part of the frame body structure is connected with a driving device which can drive the rigidity measuring sensing component to extrude the mechanical main shaft. According to the rigidity measuring clamp for the mechanical main shaft, accurate measurement of the rigidity of the mechanical main shaft is achieved through the ingeniously-designed structural combination, and the convenience, accuracy and efficiency of measurement are greatly improved. Specifically, the clamp utilizes a manually-driven adjusting bolt and a hand wheel structure, does not need to depend on large, complex and expensive test equipment, and remarkably reduces the measurement cost, so that small enterprises or laboratories can also easily undertake the measurement task.

Description

Technical Field

[0001] The utility model relates to the technical field of spindle detection, in particular to a rigidity measuring fixture for a mechanical spindle. Background Art

[0002] In the fields of machining and manufacturing, the performance of mechanical spindles is crucial. Spindle rigidity is a key indicator of its quality and reliability. Accurately measuring spindle rigidity is crucial for ensuring machining accuracy, improving production efficiency, and ensuring the long-term stability of the equipment. Traditional methods for measuring spindle rigidity often face numerous challenges. For one thing, existing measurement methods may rely on large, complex, and expensive testing equipment. This equipment not only takes up a lot of space but also has high operating and maintenance costs, making it financially unaffordable for small businesses or laboratories.

[0003] For example, some high-precision mechanical testing instruments require professional technicians to operate, which increases labor costs and technical barriers. On the other hand, general fixtures may have applicability issues when measuring the rigidity of mechanical spindles. Mechanical spindles of different types, specifications and shapes require specific clamping methods to ensure measurement accuracy. However, existing fixtures are often not well adapted to the characteristics of various spindles, which may lead to problems such as unstable clamping and large measurement errors. For example, for some slender spindles, ordinary fixtures may not provide sufficient support force, which can easily cause the spindle to bend and deform during the measurement process, thereby affecting the rigidity measurement results.

[0004] Furthermore, with the continuous advancement of machining technology, the requirements for spindle rigidity measurement accuracy and efficiency are becoming increasingly stringent. In areas such as high-speed machining and precision machining, even slight changes in rigidity can significantly impact machining quality. Therefore, more accurate and efficient rigidity measurement fixtures are needed to meet the demands of modern manufacturing. Furthermore, traditional measurement methods can be time-consuming, hindering production schedules and reducing a company's competitiveness.

[0005] In summary, the existing mechanical spindle rigidity measurement methods and fixtures have shortcomings in terms of cost, applicability, accuracy and efficiency. There is an urgent need to develop a new type of mechanical spindle rigidity measurement fixture to meet the needs of the ever-evolving machining industry. Utility Model Content

[0006] In response to the shortcomings of the existing technology, the present invention provides a fixture for measuring the rigidity of a mechanical spindle. During lathe machining, the rigidity of the spindle has a significant impact on machining accuracy and surface quality. Therefore, accurately measuring the rigidity of the spindle is crucial for evaluating lathe performance, optimizing machining processes, and improving product quality. However, existing measurement methods and fixtures have several shortcomings, such as low accuracy, poor applicability, severe eccentricity, complex operation, and high cost. This fixture can accurately and stably clamp mechanical spindles of different specifications, providing reliable support for rigidity measurement and improving measurement accuracy and efficiency.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a mechanical spindle rigidity measurement fixture, including a symmetrically arranged spindle support, a mechanical spindle is fixed on the upper part of the spindle support, the end of the mechanical spindle is connected to a frame structure, a rigidity measurement sensor component is movably arranged inside the frame structure, and a driving device is connected to the end of the frame structure, and the driving device can drive the rigidity measurement sensor component to squeeze the mechanical spindle, thereby detecting the rigidity of the mechanical spindle.

[0008] Furthermore, the frame structure comprises a plurality of connecting rods and a base plate, wherein the plurality of connecting rods are connected to the edge of the end of the mechanical main shaft by bolts, and the base plate is installed at one end of the plurality of connecting rods away from the mechanical main shaft.

[0009] Furthermore, a measurement auxiliary plate is installed at the end of the mechanical main shaft and located at the center of the plurality of connecting rods.

[0010] Furthermore, the rigidity sensing component includes several guide columns, a moving block, a sensor fixing seat, and a pressure sensor. Several guide columns are fixed inside the base plate, the moving block is slidably connected to the outside of the several guide columns, the sensor fixing seat is installed at one end of the moving block facing the mechanical main shaft, and the pressure sensor is installed inside the sensor fixing seat.

[0011] Furthermore, the rigidity sensing component further includes a data collector and a data line. The data collector is connected to the pressure sensor via the data line. After the connection, the data measured by the pressure sensor can be transmitted to the data collector.

[0012] Furthermore, the driving device includes an adjusting bolt and a handwheel, the adjusting bolt is threadedly connected to the inside of the base plate, the handwheel is installed on one end of the adjusting bolt, and the other end of the adjusting bolt is against the moving block.

[0013] Furthermore, the adjusting bolt and the handwheel are connected and fixed via an end key.

[0014] The utility model provides a mechanical spindle rigidity measurement fixture. Compared with the existing technology, it has the following advantages:

[0015] 1. This mechanical spindle rigidity measurement fixture, through its ingeniously designed structural combination, enables precise measurement of mechanical spindle rigidity, significantly improving measurement convenience, accuracy, and efficiency. Specifically, the fixture utilizes a manually driven adjustment bolt and handwheel structure, eliminating the need for large, complex, and expensive test equipment. This significantly reduces measurement costs, making it easy for even small businesses or laboratories to undertake measurement tasks. It also ensures stable clamping of the mechanical spindle during measurement, effectively avoiding measurement errors caused by unstable clamping.

[0016] 2. The fixture also ensures the linear motion of the pressure sensor during the measurement process through the setting of four guide columns and moving blocks, further improving the accuracy and reliability of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model for performing a rigidity test on a mechanical spindle;

[0018] Figure 2 This is a schematic diagram of the disassembled structure of the fixture of the utility model;

[0019] Figure 3 This is a schematic diagram of the assembly structure of the fixture of the utility model;

[0020] Figure 4 for Figure 1 Schematic diagram of the structure in which the mechanical spindle and fixture are separated.

[0021] Figure 5 for Figure 1 A half-section view of

[0022] Figure 6 for Figure 1 A partial cross-sectional view of .

[0023] In the figure: 1. Spindle support; 2. Mechanical spindle; 3. Connecting rod; 4. Base plate; 5. Measurement auxiliary plate; 6. Moving block; 7. Guide column; 8. Sensor fixing seat; 9. Pressure sensor; 10. Adjustment bolt; 11. Handwheel; 12. Data collector; 13. Data cable; 14. Terminal key. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-6 The utility model provides a technical solution: a mechanical spindle rigidity measurement fixture, which is used to accurately measure the rigidity of the mechanical spindle and ensure the stability and accuracy of the mechanical spindle during operation. It mainly consists of two spindle supports 1, six connecting rods 3, a base plate 4, a measurement auxiliary plate 5, a moving block 6, four guide columns 7, a sensor fixing seat 8, a pressure sensor 9, an adjustment bolt 10, a handwheel 11, a data collector 12, a data cable 13 and an end key 14.

[0026] Specifically, during the testing process, the mechanical spindle 2 to be tested is first placed inside the two spindle supports 1 (both spindle supports 1 are provided with "V"-shaped grooves to constrain the placed mechanical spindle 2). Both ends of the mechanical spindle 2 include flanges (the flanges are an inherent structure of the mechanical spindle 2). After placement, the two flanges fit neatly on the outside of the two spindle supports 1. In this way, when pressure is applied during testing, the mechanical spindle 2 will not move laterally. Subsequently, the measurement auxiliary plate 5 is bolted to the end of the mechanical spindle 2 that is under pressure during testing, and then the six connecting rods 3 are bolted to the inherent countersunk holes of the mechanical spindle 2.

[0027] Then, install the four guide pillars 7 inside the base plate 4, and then sleeve the moving block 6 on the outside of the four guide pillars 7. Then, install the pressure sensor 9 connected to the data cable 13 inside the sensor fixing base 8. Then, install the entire sensor fixing base 8 and pressure sensor 9 at the end of the moving block 6.

[0028] Then, the adjusting bolt 10 is threadedly connected to the inside of the base plate 4, and the hand wheel 11 is fixed to the end of the adjusting bolt 10 through the end key 14, while the other end thread of the adjusting bolt 10 is against the moving block 6;

[0029] Finally, the base plate 4 is mounted on the ends of the six connecting rods 3, and the other end of the data line 13 is connected to the data collector 12;

[0030] When conducting a rigidity test, the staff manually cranks the handwheel 11, thereby driving the adjusting bolt 10 to rotate. Since the adjusting bolt 10 is threadedly connected to the base plate 4, when the adjusting bolt 10 rotates, the handwheel 11 and the adjusting bolt 10 as a whole will move horizontally toward the moving block 6. During the movement, the end of the adjusting bolt 10 will contact the moving block 6. When the handwheel 11 is continued to be cranked, the adjusting bolt 10 will push the moving block 6 along the direction of the four guide columns 7, gradually approaching the measurement auxiliary plate 5. At the same time, the sensor fixing seat 8 and the pressure sensor 9 will also move synchronously. During the movement, the pressure sensor 9 will contact the measurement auxiliary plate 5. After contact, pressure will be generated. At this time, the pressure sensor 9 will transmit the pressure data to the data collector 12 through the data line 13. By continuously cranking the handwheel 11, the pressure applied will become greater and greater, thereby detecting the rigidity performance of the mechanical spindle 2.

[0031] It should be noted that the data detected by the pressure sensor 9 is transmitted to the data collector 12 via the data line 13 , which is a well-known technology and will not be described in detail here.

Claims

1. A mechanical spindle rigidity measuring fixture, comprising a symmetrically arranged spindle support (1), a mechanical spindle (2) being fixed on the upper portion of the spindle support (1), characterized in that: The end of the mechanical main shaft (2) is connected to a frame structure, a rigidity sensing component is movably provided inside the frame structure, and the end of the frame structure is connected to a driving device, which can drive the rigidity sensing component to squeeze the mechanical main shaft (2), thereby detecting the rigidity of the mechanical main shaft (2).

2. The rigidity measuring fixture for a mechanical spindle according to claim 1, characterized in that: The frame structure comprises a plurality of connecting rods (3) and a base plate (4), wherein the plurality of connecting rods (3) are connected to the edge of the end of the mechanical main shaft (2) by bolts, and the base plate (4) is installed at the end of the plurality of connecting rods (3) that is away from the mechanical main shaft (2).

3. The rigidity measuring fixture for a mechanical spindle according to claim 2, characterized in that: A measurement auxiliary plate (5) is installed at the end of the mechanical main shaft (2) and located at the center of the plurality of connecting rods (3).

4. The rigidity measuring fixture for a mechanical spindle according to claim 2, characterized in that: The rigidity sensing component comprises a plurality of guide columns (7), a moving block (6), a sensor fixing seat (8), and a pressure sensor (9), wherein the plurality of guide columns (7) are fixed inside the base plate (4), the moving block (6) is slidably connected to the outside of the plurality of guide columns (7), the sensor fixing seat (8) is installed at one end of the moving block (6) facing the mechanical main shaft (2), and the pressure sensor (9) is installed inside the sensor fixing seat (8).

5. The rigidity measuring fixture for a mechanical spindle according to claim 4, characterized in that: The rigidity sensing component further comprises a data collector (12) and a data line (13). The data collector (12) is connected to the pressure sensor (9) via the data line (13). After the connection, the data measured by the pressure sensor (9) can be transmitted to the data collector (12).

6. The rigidity measuring fixture for a mechanical spindle according to claim 2, characterized in that: The driving device comprises an adjusting bolt (10) and a hand wheel (11), wherein the adjusting bolt (10) is threadedly connected to the interior of the base plate (4), the hand wheel (11) is mounted on one end of the adjusting bolt (10), and the other end of the adjusting bolt (10) abuts against the moving block (6).

7. The rigidity measuring fixture for a mechanical spindle according to claim 6, characterized in that: The adjusting bolt (10) and the hand wheel (11) are connected and fixed via an end key (14).

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