Quick release device for machine tool load testing and method of installation

Abstract

The application discloses a quick dismounting device for machine tool loading test, which comprises an upper nut, an upper gasket, a lower gasket, a loading device lower cantilever, a lower nut and an electric cylinder, the lower nut is sleeved on the rotating shaft of the electric cylinder, the lower gasket is located on the lower nut, the loading device lower cantilever is sleeved on the lower nut, the upper nut is located on the top of the loading device lower cantilever, and the upper gasket is located between the upper nut and the loading device lower cantilever. When the upper nut and the lower nut are installed with the electric cylinder, the installation is completed through a conical sleeve of an intermediate connecting piece. The conical sleeve is detachably connected with the electric cylinder in a threaded mode, and the portability of the installation is improved. The quick dismounting device for five-axis machine tool spindle end loading test can protect the loading equipment and the electric cylinder, and improve the reliability and detection efficiency of the existing loading RTCP detection method.

Description

Technical Field

[0001] This invention belongs to the field of mechanical equipment assembly technology, specifically relating to a quick disassembly device and installation method for machine tool loading tests. Background Technology

[0002] With the continuous development of manufacturing technology, the machining accuracy of CNC machine tools is constantly improving, meeting higher precision requirements. During this development, error detection methods for machine tool accuracy are also constantly being updated and developed. Among them, instrument-based detection techniques have gradually matured, such as commonly used ballbars, laser trackers, and R-tests. Due to their advantages of high precision and efficiency, instrument-based detection methods are currently the primary method for detecting machine tool error data. However, during instrument-based detection, the machine tool is mostly in an unloaded state, while in actual machining, the machine tool is subjected to complex loads. Therefore, commonly used instrument-based detection methods cannot reflect the actual working state of the machine tool. If the machine tool spindle could be loaded simultaneously with instrument-based detection, the actual machining state of the machine tool could be simulated. Existing loading devices for machine tool spindles have the following problems:

[0003] 1. When using threaded connections to connect the electric cylinder shaft and the loading device, the assembly and disassembly process is cumbersome and inconvenient due to the space limitations and large overall structural mass of the loading device.

[0004] 2. When connecting the electric cylinder and the loading device, human error can easily damage the threads on the electric cylinder shaft, affecting the stability and safety of the connection process;

[0005] 3. Since electric cylinders can generate large loading forces, if there are machining errors that cause deviations in the transmission of loading forces when the electric cylinder is rigidly connected to the loading equipment, it will cause strong destructive forces to the loading equipment and the electric cylinder. Summary of the Invention

[0006] The purpose of this invention is to solve the above-mentioned problems and provide a quick disassembly device that can protect the loading equipment and electric cylinder, thereby improving the reliability and testing efficiency of the existing loading RTCP detection method for five-axis machine tool spindle end loading test.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is: a quick disassembly device for machine tool loading test, comprising an upper nut, an upper washer, a lower washer, a lower cantilever of a loading device, a lower nut, and an electric cylinder. The lower nut is sleeved on the rotating shaft of the electric cylinder, the lower washer is located on the lower nut, the lower cantilever of the loading device is sleeved on the lower nut, the upper nut is located at the top of the lower cantilever of the loading device, and the upper washer is located between the upper nut and the lower cantilever of the loading device.

[0008] Preferably, the upper nut has a "T" shaped cross-section and is provided with a first hole and a second hole. The first hole is located at the center of the upper nut, and the second hole is located around the first hole. The axes of the first hole and the second hole are parallel to each other.

[0009] Preferably, the lower nut has a "T" shaped cross-section and a through hole in the middle.

[0010] Preferably, the upper gasket has a ring structure, and the lower gasket has the same structure as the upper gasket.

[0011] Preferably, the lower cantilever of the loading device includes a lower cantilever base plate, a lower cantilever side plate, and a lower cantilever column. The lower cantilever side plate is located on both sides of the lower cantilever base plate and is fixedly connected to it as an integral device structure. The lower cantilever base plate and the lower cantilever column are fixedly connected to each other as an integral structure and are in the shape of an "L". The side of the lower cantilever side plate is fixedly connected to the lower cantilever column as an integral structure. The lower cantilever base plate is provided with a lower cantilever base plate through hole, and the lower cantilever base plate is sleeved on the lower nut.

[0012] Preferably, the electric cylinder is model SEA803-967, the rotating shaft of the electric cylinder is M20×1.5, the effective stroke is 50mm, the maximum stroke is 50mm, the lead screw of the electric cylinder is 5mm, the rated push and pull force is 13KN, the rated speed is 25mm / sec, the servo motor power is 400W, and the servo motor rated speed is 3000rpm.

[0013] The beneficial effects of this invention are:

[0014] 1. The present invention provides a quick disassembly device for machine tool loading testing, which can protect the loading equipment and electric cylinder, thereby improving the reliability and testing efficiency of the existing loading RTCP testing method.

[0015] 2. This invention generates a loading force through an electric cylinder, and uses a loading device to transmit the loading force to the machining spindle, thereby completing the loading of the machine tool spindle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a quick disassembly device for machine tool loading test according to the present invention;

[0017] Figure 2 This is a schematic diagram of the end face structure of the nut in this invention;

[0018] Figure 3 This is a cross-sectional view of the nut in this invention;

[0019] Figure 4 This is a cross-sectional view of the nut of the present invention;

[0020] Figure 5 This is a cross-sectional view of the gasket structure of the present invention;

[0021] Figure 6 This is a schematic diagram of the lower cantilever structure of the loading device of the present invention;

[0022] Figure 7 This is a cross-sectional structural schematic diagram of the lower cantilever of the loading device of the present invention;

[0023] Figure 8 This is a cross-sectional structural schematic diagram of the conical sleeve of the present invention.

[0024] Explanation of reference numerals in the attached drawings: 1. Upper nut; 2. Upper washer; 3. Lower cantilever of loading device; 4. Lower nut; 5. Electric cylinder; 6. Lower washer; 7. Conical sleeve; 11. First hole of upper nut; 12. Second hole of upper nut; 31. Lower cantilever base plate; 32. Lower cantilever side plate; 33. Lower cantilever column; 34. Through hole of lower cantilever base plate; 41. Through hole of lower nut; 331. Groove of lower cantilever column; 332. First through hole of lower cantilever column; 333. Second through hole of lower cantilever column. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0026] like Figures 1 to 8 As shown, the present invention provides a quick disassembly device for machine tool loading test, including an upper nut 1, an upper washer 2, a lower washer 6, a loading device lower cantilever 3, a lower nut 4, and an electric cylinder 5. The lower nut 4 is sleeved on the rotating shaft of the electric cylinder 5, the lower washer 6 is located on the lower nut 4, the loading device lower cantilever 3 is sleeved on the lower nut 4, the upper nut 1 is located at the top of the loading device lower cantilever 3, and the upper washer 2 is located between the upper nut 1 and the loading device lower cantilever 3.

[0027] When installing the upper nut 1 and lower nut 4 with the electric cylinder 5, they are connected via the intermediate connecting piece tapered sleeve 7. The tapered sleeve 7 and the electric cylinder 5 are connected by a detachable thread, which increases the ease of installation.

[0028] The end face of the upper nut 1 is hexagonal, and the cross-section of the upper nut 1 is T-shaped. The upper nut 1 is provided with a first hole 11 and a second hole 12. The first hole 11 is located at the center of the upper nut 1, and the second hole 12 is located around the first hole 11. The axis of the first hole 11 and the axis of the second hole 12 are parallel to each other.

[0029] The first hole 11 of the upper nut is an M20 threaded through hole, designed for threaded connection with the electric cylinder 5. In actual use, the first hole 11 of the upper nut can be changed and set according to the size of the rotating shaft of the electric cylinder 5, so that the upper nut 1 and the electric cylinder 5 can be better connected. The first hole 11 of the upper nut is generally suitable for rotating shafts of 10-30mm. There are six second holes 12 of the upper nut, arranged circumferentially around the first hole 11 of the upper nut.

[0030] The lower nut 4 has a "T" shaped cross-section, and a lower nut through hole 41 is provided in the middle of the lower nut 4. In this embodiment, the upper nut 1 and the lower nut 4 are arranged symmetrically.

[0031] The lower nut has an M20 threaded through hole, which is used to connect with the electric cylinder 5 via a threaded connection. The threaded through hole can be changed according to the size of the rotating shaft of the electric cylinder being used, and is generally suitable for rotating shafts of 10 to 30 mm.

[0032] The upper washer 2 has a ring structure, and the lower washer 6 has the same structure as the upper washer 2. Both upper washer 2 and lower washer 6 are elastic washers. Both upper washer 2 and lower washer 6 are made of fluororubber, with an outer diameter of 45mm and an inner diameter of 29.9mm. In actual use, the size of the washers can be adjusted according to the size of the upper nut 1 and the lower nut 4, and the material can be selected according to the application scenario and the load to be borne.

[0033] The lower cantilever 3 of the loading device includes a lower cantilever base plate 31, lower cantilever side plates 32, and a lower cantilever column 33. The lower cantilever side plates 32 are located on both sides of the lower cantilever base plate 31 and are fixedly connected to it as an integral structure. The lower cantilever base plate 31 and the lower cantilever column 33 are fixedly connected to each other as an integral structure and are in an "L" shape. The sides of the lower cantilever side plates 32 are fixedly connected to the lower cantilever column 33 as an integral structure. The lower cantilever base plate 31 is provided with a lower cantilever base plate through hole 34, and the lower cantilever base plate 31 is sleeved on the lower nut 4. The lower cantilever column 33 is a column structure.

[0034] In this embodiment, there are two lower cantilever side plates 32, which are symmetrically distributed. A lower cantilever column groove 331 is provided on the surface of the lower cantilever column 33, and the cross-section of the lower cantilever column groove 331 is rectangular. The top of the lower cantilever column 33 protrudes to form a columnar structure. The top of the lower cantilever column 33 is provided with a first lower cantilever column through hole 332 and a second lower cantilever column through hole 333. The axis of the first lower cantilever column through hole 332 coincides with the axis of the top protrusion of the lower cantilever column 33. There are two lower cantilever column through holes 333, which are arranged in parallel, and the axes of the first lower cantilever column through holes 332 and the second lower cantilever column through holes 333 are perpendicular to each other.

[0035] The model of electric cylinder 5 is SEA803-967. The rotating shaft of electric cylinder 5 is M20×1.5, the effective stroke is 50mm, the maximum stroke is 50mm, the lead screw of electric cylinder 5 is 5mm, the rated push and pull force is 13KN, the rated speed is 25mm / sec, the servo motor power is 400W, and the servo motor rated speed is 3000rpm.

[0036] In the use of this invention, the loading device is connected to the main shaft.

[0037] The present invention also provides a method for installing a quick disassembly device for machine tool loading tests, comprising the following steps:

[0038] S1. When connecting experimental equipment using the quick-release device of the present invention, first connect the lower nut 4 in the quick-release device to the shaft of the electric cylinder 5 through threaded connection, and then place the lower washer 6 on the lower nut 4.

[0039] S2. After completing step S1, the tapered sleeve 7 is threaded to the electric cylinder 5, and then the lower cantilever 3 of the loading device is connected to the lower nut 4 in a hole-shaft mating manner.

[0040] like Figure 5 As shown, in this embodiment, the diameters of the two ends of the tapered sleeve 7 are A1 and A2, respectively, with A1 being larger than A2. The interior of the tapered sleeve 7 has a threaded structure, with the first hole 11 of the upper nut and the through hole 41 of the lower nut both being internally threaded holes, and the shaft end of the electric cylinder 5 having an externally threaded structure.

[0041] S3. First, unscrew the tapered sleeve 7, then connect the upper nut 1 and the electric cylinder 5 with threads. An upper washer 2 is provided between the upper nut 1 and the lower cantilever 3 of the loading device. After tightening the upper nut 1 of the quick-release device, the connection and installation of the experimental equipment can be completed.

[0042] The main feature of this invention is its ease of installation and disassembly of the experimental equipment. Installation can be completed in just the three steps described above. Disassembly of the experimental equipment simply requires unscrewing the upper nut 1, installing the conical sleeve, and then removing the lower cantilever 3 of the loading device. Furthermore, the quick-release device also serves to protect the threads and buffer stress.

[0043] In existing RTCP loading detection methods, an electric cylinder 5 is needed to generate loading force when loading the existing spindle, and an existing loading device is required to transmit the loading force to the machine tool spindle. This invention connects the electric cylinder shaft and the loading device. The invention uses two nuts to connect and fix the electric cylinder 5, significantly reducing the required operating space and allowing for convenient and quick assembly and disassembly. Since the electric cylinder 5 and the loading device are relatively heavy, this device effectively protects the threads on the electric cylinder shaft from damage due to human error during assembly. Furthermore, due to machining and machine tool errors, the loading device experiences some force when force is applied to the spindle. When the loading force is large, it can be destructive to the loading device. This invention uses a pair of elastic washers to buffer the force on the loading device, protecting it from damage.

[0044] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of the invention, and should be understood that the scope of protection of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the technical teachings disclosed in this invention without departing from the spirit of the invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. A quick disassembly device for machine tool loading testing, characterized in that: It includes an upper nut (1), an upper washer (2), a lower washer (6), a lower cantilever of the loading device (3), a lower nut (4), and an electric cylinder (5). The lower nut (4) is sleeved on the rotating shaft of the electric cylinder (5), the lower washer (6) is located on the lower nut (4), the lower cantilever of the loading device (3) is sleeved on the lower nut (4), the upper nut (1) is located at the top of the lower cantilever of the loading device (3), and the upper washer (2) is located between the upper nut (1) and the lower cantilever of the loading device (3). The upper nut (1) has a "T" shaped cross section. The upper nut (1) has a first hole (11) and a second hole (12). The first hole (11) is located at the center of the upper nut (1), and the second hole (12) is located around the first hole (11). The axis of the first hole (11) and the axis of the second hole (12) are parallel to each other. The lower nut (4) has a "T" shaped cross section and a lower nut through hole (41) in the middle. The upper gasket (2) has a ring structure, and the lower gasket (6) has the same structure as the upper gasket (2); The lower cantilever (3) of the loading device includes a lower cantilever base plate (31), a lower cantilever side plate (32) and a lower cantilever column (33). The lower cantilever side plate (32) is located on both sides of the lower cantilever base plate (31) and is fixedly connected to the lower cantilever column (33) as an integral structure. The lower cantilever base plate (31) and the lower cantilever column (33) are fixedly connected to each other as an integral structure and are in the shape of an "L". The side of the lower cantilever side plate (32) is fixedly connected to the lower cantilever column (33) as an integral structure. The lower cantilever base plate (31) is provided with a lower cantilever base plate through hole (34). The lower cantilever base plate (31) is sleeved on the lower nut (4). The number of lower cantilever side plates (32) is two and symmetrically distributed; the surface of the lower cantilever column (33) is provided with a lower cantilever column groove (331), and the cross section of the lower cantilever column groove (331) is a rectangular structure; the top of the lower cantilever column (33) protrudes to form a column structure, and the top of the lower cantilever column (33) is provided with a lower cantilever column first through hole (332) and a lower cantilever column second through hole (333), the axis of the lower cantilever column first through hole (332) coincides with the axis of the protrusion at the top of the lower cantilever column (33); the number of lower cantilever column second through holes (333) is two and arranged in parallel, and the axis of the lower cantilever column first through hole (332) and the axis of the lower cantilever column second through hole (333) are perpendicular to each other.

2. The quick disassembly device for machine tool loading testing according to claim 1, characterized in that: The electric cylinder (5) is model SEA803-967. The rotating shaft of the electric cylinder (5) is M20×1.5, the effective stroke is 50mm, the maximum stroke is 50mm, the lead of the electric cylinder (5) is 5mm, the rated push and pull force is 13KN, the rated speed is 25mm / sec, the servo motor power is 400W, and the servo motor rated speed is 3000rpm.

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