Quick dismounting device for machine tool loading test and mounting method

Abstract

The invention discloses a quick dismounting device for a 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, and is characterized in that the lower nut sleeves a rotating shaft of the electric cylinder, the lower gasket is positioned on the lower nut, the loading device lower cantilever sleeves the lower nut, the upper nut is positioned at the top of the loading device lower cantilever, and the upper gasket is positioned at the top of the loading device lower cantilever. And the upper gasket is positioned between the upper nut and the lower cantilever of the loading device. When the upper nut and the lower nut are installed with the electric cylinder, the installation is completed through a conical sleeve of a middle connecting piece. And the conical sleeve is in detachable threaded connection with the electric cylinder, so that the mounting portability is improved. According to the quick dismounting device for the five-axis machine tool spindle end loading test, loading equipment and an electric cylinder can be protected, so that the reliability and the detection efficiency of an existing loading RTCP detection method are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical equipment assembly, and in particular relates to a quick disassembly device and an installation method for a machine tool loading test. Background Art

[0002] With the continuous development of manufacturing technology, the machining accuracy of CNC machine tools is constantly improving and can meet higher precision requirements. During its development, the error detection methods for machine tool accuracy are also constantly updated and developed. Among them, the detection technology of instrument detection method has gradually matured, such as the commonly used ballbar, laser tracker and R-test, etc. Due to its advantages of high precision and high efficiency, the technical method of instrument detection method is currently the most important method for detecting machine tool error data. However, during the detection process of instrument detection method, the machine tools are mostly in no-load state, and the machine tools will be subjected to complex loads during the actual processing process, so the commonly used instrument detection method cannot reflect the actual working state of the machine tools. If the machine tool spindle can be loaded while using the instrument detection method, the actual processing state of the machine tool can be simulated. The existing loading equipment for loading the machine tool spindle has the following problems:

[0003] 1. When the electric cylinder shaft and the loading device are connected by threaded connection, the assembly and disassembly process is cumbersome and inconvenient due to the limited space of the loading device and the large overall structure mass;

[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 the electric cylinder can generate a large loading force, when the electric cylinder is rigidly connected to the loading device, if there is a processing error that causes a deviation in the transmission process of the loading force, it will have a strong destructive force on the loading device and the electric cylinder. Summary of the invention

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

[0007] In order to solve the above 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 gasket, a lower gasket, 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 gasket 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 gasket is located between the upper nut and the lower cantilever of the loading device.

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

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

[0010] Preferably, the upper gasket is an annular 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 bottom plate, a lower cantilever side plate and a lower cantilever column. The lower cantilever side plates are located on both sides of the lower cantilever bottom plate and are fixedly connected to form an integrated device structure. The lower cantilever bottom plate is fixedly connected to the lower cantilever column as an integrated structure and presents an "L"-shaped structure. The side surface of the lower cantilever side plate is fixedly connected to the lower cantilever column as an integrated structure. A lower cantilever bottom plate through hole is provided on the lower cantilever bottom plate, and the lower cantilever bottom plate is sleeved on the lower nut.

[0012] Preferably, the model of the electric cylinder is SEA803-967, the rotating shaft of the electric cylinder is M20×1.5, the effective stroke is 50mm, the maximum stroke is 50mm, the screw lead 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 rated speed of the servo motor is 3000rmp.

[0013] The beneficial effects of the present invention are:

[0014] 1. The quick disassembly device for machine tool loading test provided by the present invention can protect the loading equipment and the electric cylinder, so as to improve the reliability and detection efficiency of the existing loading RTCP detection method.

[0015] 2. The present invention generates a loading force through an electric cylinder, and uses a loading device to transmit the loading force to the machine tool spindle, thereby completing the loading of the machine tool spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a quick disassembly device for machine tool loading test of the present invention;

[0017] Figure 2 It is a schematic diagram of the end surface structure of the upper nut of the present invention;

[0018] Figure 3 It is a schematic cross-sectional structural diagram of the upper nut of the present invention;

[0019] Figure 4 It is a schematic cross-sectional structural diagram of the lower nut of the present invention;

[0020] Figure 5 It is a schematic cross-sectional structural diagram of the upper gasket of the present invention;

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

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

[0023] Figure 8 It is a schematic cross-sectional view of the tapered sleeve of the present invention.

[0024] Explanation of the reference numerals: 1. upper nut; 2. upper gasket; 3. lower cantilever of loading device; 4. lower nut; 5. electric cylinder; 6. lower gasket; 7. tapered sleeve; 11. first hole of upper nut; 12. second hole of upper nut; 31. bottom plate of lower cantilever; 32. side plate of lower cantilever; 33. column of lower cantilever; 34. through hole of bottom plate of lower cantilever; 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 DESCRIPTION

[0025] The present invention will be further described below in conjunction with 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, comprising an upper nut 1, an upper gasket 2, a lower gasket 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 gasket 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 gasket 2 is located between the upper nut 1 and the loading device lower cantilever 3.

[0027] When the upper nut 1 and the lower nut 4 are installed with the electric cylinder 5, they are completed through the intermediate connecting member tapered sleeve 7. The tapered sleeve 7 and the electric cylinder 5 are detachably threadedly connected, which increases the portability of the installation.

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

[0029] The first hole 11 of the upper nut is a threaded through hole of M20, and its function is to complete the 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 used in conjunction, so that the upper nut 1 can be better connected with the electric cylinder 5. The first hole 11 of the upper nut is generally suitable for a rotating shaft of 10 to 30 mm. The number of the second holes 12 of the upper nut is six, and they are distributed circumferentially around the first hole 11 of the upper nut.

[0030] The cross section of the lower nut 4 is in a "T"-shaped structure, 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 through hole is an M20 threaded through hole, and its function is to complete the threaded connection with the electric cylinder 5. The threaded through hole can be changed according to the size of the rotating shaft of the electric cylinder used in conjunction, and is generally suitable for a rotating shaft of 10 to 30 mm.

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

[0033] The lower cantilever 3 of the loading device includes a lower cantilever bottom plate 31, a lower cantilever side plate 32 and a lower cantilever column 33. The lower cantilever side plates 32 are located on both sides of the lower cantilever bottom plate 31 and are fixedly connected to form an integrated device structure. The lower cantilever bottom plate 31 and the lower cantilever column 33 are fixedly connected to form an integrated structure and present an "L"-shaped structure. The side surface of the lower cantilever side plate 32 is fixedly connected to the lower cantilever column 33 to form an integrated structure. The lower cantilever bottom plate through hole 34 is provided on the lower cantilever bottom plate 31, and the lower cantilever bottom plate 31 is sleeved on the lower nut 4. The lower cantilever column 33 is a column structure.

[0034] In this embodiment, the number of the lower cantilever side plates 32 is two and they 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 a rectangular structure. The top of the lower cantilever column 33 is protruded to form a column structure, and the top of the lower cantilever column 33 is provided with a first through hole 332 of the lower cantilever column and a second through hole 333 of the lower cantilever column, and the axis of the first through hole 332 of the lower cantilever column coincides with the axis of the protrusion on the top of the lower cantilever column 33. The number of the second through hole 333 of the lower cantilever column is two and they are arranged in parallel, and the axis of the first through hole 332 of the lower cantilever column and the axis of the second through hole 333 of the lower cantilever column are perpendicular to each other.

[0035] The model of electric cylinder 5 is SEA803-967, the rotating axis 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 rated speed of the servo motor is 3000rmp.

[0036] During use, the present invention is connected to the existing loading device through the lower cantilever 3 of the loading device, and is connected to the existing main shaft through the electric cylinder 5.

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

[0038] S1. When connecting the experimental equipment through 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 cooperation, and then put the lower gasket 6 on the lower nut 4.

[0039] S2. On the basis of completing step S1, the tapered sleeve 7 is threadedly connected to the electric cylinder 5, and then the lower cantilever 3 of the loading device is connected to the lower nut 4 by hole-shaft matching.

[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, and A1 is larger than A2. The interior of the tapered sleeve 7 is a threaded structure, the upper nut first hole 11 and the lower nut through hole 41 are both internal threaded holes, and the shaft end of the electric cylinder 5 is an external threaded structure.

[0041] S3. The conical sleeve 7 needs to be unscrewed first, and then the upper nut 1 and the electric cylinder 5 are threadedly connected. An upper gasket 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 the present invention is that it is easy to install and disassemble the experimental equipment, wherein the installation only requires the above three steps to complete the equipment installation. When disassembling the experimental equipment, it is only necessary to unscrew the upper nut 1, install the conical sleeve, and then remove the lower cantilever 3 of the loading device. In addition, the quick-release device also has the functions of protecting the thread and force buffering.

[0043] In the existing loading RTCP detection method, when loading the existing spindle, it is necessary to use an electric cylinder 5 to generate a loading force, and at the same time, the existing loading device is required to transfer the loading force to the machine tool spindle. The electric cylinder shaft and the loading device are connected by the present invention. The present invention realizes the connection and fixation with the electric cylinder 5 through two upper and lower nuts. When used, the requirements for the operating space can be greatly reduced, and assembly and disassembly can be very convenient and quick. Since the weight of the electric cylinder 5 and the loading device is heavy, in order to prevent human error during the assembly process from causing damage to the threads on the electric cylinder shaft, this device is used to effectively protect the threads from damage. In addition, due to processing errors and machine tool errors, when force is applied to the spindle, the loading device will be affected by a part of the force. When the loading force is large, it will have a destructive effect on the loading device. The present invention uses a pair of elastic gaskets to buffer the force applied to the loading device and protect the loading device from damage.

[0044] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A quick disassembly device for machine tool loading test, characterized in that: The invention comprises an upper nut (1), an upper gasket (2), a lower gasket (6), a lower cantilever of a 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 gasket (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 on the top of the lower cantilever of the loading device (3); and the upper gasket (2) is located between the upper nut (1) and the lower cantilever of the loading device (3).

2. A quick disassembly device for machine tool loading test according to claim 1, characterized in that: The cross section of the upper nut (1) is in a T-shaped structure. The upper nut (1) is provided with an upper nut first hole (11) and an upper nut second hole (12). The upper nut first hole (11) is located at the center of the upper nut (1), and the upper nut second hole (12) is located around the upper nut first hole (11). The axis of the upper nut first hole (11) and the axis of the upper nut second hole (12) are parallel to each other.

3. A quick disassembly device for machine tool loading test according to claim 1, characterized in that: The cross section of the lower nut (4) is in a "T"-shaped structure, and a lower nut through hole (41) is provided in the middle of the lower nut (4).

4. A quick disassembly device for machine tool loading test according to claim 1, characterized in that: The upper gasket (2) is an annular structure, and the lower gasket (6) has the same structure as the upper gasket (2).

5. The quick disassembly device for machine tool loading test according to claim 1, characterized in that: The loading device lower cantilever (3) comprises a lower cantilever bottom plate (31), a lower cantilever side plate (32) and a lower cantilever column (33); the lower cantilever side plates (32) are located on both sides of the lower cantilever bottom plate (31) and are fixedly connected to form an integrated device structure; the lower cantilever bottom plate (31) and the lower cantilever column (33) are fixedly connected to form an integrated structure and present an "L"-shaped structure; the side surface of the lower cantilever side plate (32) and the lower cantilever column (33) are fixedly connected to form an integrated structure; a lower cantilever bottom plate through hole (34) is provided on the lower cantilever bottom plate (31); and the lower cantilever bottom plate (31) is sleeved on the lower nut (4).

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

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