Main shaft rigidity detection device

Abstract

The utility model discloses a main shaft rigidity detection device, and relates to the technical field of machining detection, one end of a support of a support frame is provided with a tool clamp mechanism, a multi-station detection mechanism is arranged between two opposite groups of position correction sliding tables, the top end of a support arm is provided with a force sensor, and the force sensor is connected with a force sensor. And distance measuring sensors opposite to the force sensor are symmetrically arranged above the support arm of the rotating arm along the sliding direction of the propelling sliding table. According to the design, the static pressure main shaft is mechanically clamped and fixed based on the tool clamp mechanism, then the multi-station detection mechanism is moved to the side of the static pressure main shaft by utilizing the horizontal braking of the combination of the position correction lead screw and the position correction sliding table, and the static pressure main shaft is detected in an axial or radial state by utilizing the rotation and propulsion position correction of the multi-station detection mechanism. According to the invention, the rigidity of the static pressure main shaft can be detected flexibly and variably, the detection is more flexible and varied, the detection capability is stronger, the modularization adaptability is better, and the static pressure main shaft can be detected continuously and uninterruptedly.

Description

Technical Field

[0001] The utility model relates to the field of machining detection, in particular to a spindle stiffness detection device. Background Art

[0002] Generally speaking, the greater the stiffness of the spindle bearing, the stronger its resistance to external forces. Improving the stiffness of the machine tool spindle is an important means to ensure the machining accuracy of the machine tool, improve production efficiency and extend the life of the machine tool. Especially for precision machine tools, a hydrostatic spindle is usually used as its spindle structure. Before the assembly of the hydrostatic spindle and during subsequent assembly and use, it is necessary to use a detection device to detect its stiffness to ensure its qualification. For example, as shown in the device for detecting the static stiffness of the electric spindle disclosed in the China Patent Network (publication announcement number CN219798653U), this type of detection device uses an axial moving mechanism in the form of a knob push. It is very convenient to apply axial force to the electric spindle by moving the moving end of the axial moving mechanism, and the spindle stiffness can be detected without disassembly.

[0003] However, the spindle stiffness detection devices described in the aforementioned patents and currently available on the market still have some shortcomings: while existing detection devices reduce the effort required for assembly and disassembly, direct testing by mounting the detection device on the spindle still requires extensive and cumbersome procedures, and can only perform a single axial stiffness test, resulting in relatively low detection capabilities. Therefore, those skilled in the art have provided a spindle stiffness detection device to address the issues raised in the aforementioned background technology. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides a spindle stiffness detection device, which solves the problem of relatively low detection capability of the prior spindle stiffness detection device proposed in the above background art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A spindle stiffness detection device includes a support frame;

[0006] A fixture mechanism is installed at one end of the support frame;

[0007] The two sides of the support frame are symmetrically connected with calibration screws, and the outer sides of the shafts of the two groups of calibration screws are symmetrically sleeved with horizontally opposite calibration slides, and a multi-station detection mechanism is installed between the two opposite groups of calibration slides;

[0008] The multi-station detection mechanism includes a rotating table installed between two groups of calibration slides, a rotating motor is installed in the middle of the base frame of the rotating table, and a rotating shaft is installed at the output end of the rotating motor, a rotating arm is installed at the top of the shaft of the rotating shaft, and the support arm of the rotating arm is provided with a propulsion slide rail and a propulsion screw rod from bottom to top, and the outer side of the shaft rod of the propulsion screw rod is provided with a propulsion slide rail guided by the propulsion slide rail, a support arm is provided at the upper end of the platform of the propulsion slide, a force sensor is provided at the top of the support arm of the support arm, and a distance measuring sensor opposite to the force sensor is symmetrically provided above the support arm of the rotating arm along the sliding direction of the propulsion slide.

[0009] As a further technical solution of the present invention: a propulsion handwheel is installed at one end of the shaft of the propulsion screw.

[0010] As a further technical solution of the present invention: the sensing direction of the distance sensor is the same as the force direction of the force sensor.

[0011] As a further technical solution of the present invention: a positioning motor for driving one set of positioning screw rods is provided on one side of the support frame, and the two opposite sets of positioning screw rods are connected by a synchronous belt transmission.

[0012] As a further technical solution of the present invention: the tooling fixture mechanism includes a tooling table installed at one end of the support frame bracket, the table frame of the tooling table is rotatably connected to a clamping screw rod, and clamping guide rails installed on the tooling table are symmetrically arranged on both sides of the clamping screw rod, and the outer side of the shaft of the clamping screw rod is symmetrically sleeved with a clamping slide guided by the clamping guide rail, and a clamping plate is installed above each group of clamping slides.

[0013] As a further technical solution of the present invention: a clamping motor is installed inside the frame of the tooling table along the axis direction of the clamping screw rod, and the clamping motor and the clamping screw rod are connected by a transmission belt.

[0014] As a further technical solution of the present invention: the clamping screw rod is bounded by a center line, and positive and negative thread teeth opposite to the two groups of clamping slides are symmetrically arranged on both sides of the center line.

[0015] The utility model provides a spindle stiffness detection device, which has the following beneficial effects compared with the prior art:

[0016] The spindle stiffness detection device of this design is based on the mechanical clamping and fixing of the hydrostatic spindle by a fixture mechanism, and then uses the horizontal braking of the positioning screw and the positioning slide to move the multi-station detection mechanism to the side of the hydrostatic spindle, and uses the rotation and propulsion positioning of the multi-station detection mechanism to perform flexible and varied stiffness detection on the hydrostatic spindle in an axial or radial state. Its detection is more flexible and varied, its detection capability is stronger, and its modular adaptability is better, so it can perform continuous and uninterrupted detection on the hydrostatic spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a spindle stiffness detection device;

[0018] Figure 2 This is a schematic diagram of the structure of a fixture mechanism in a spindle stiffness detection device;

[0019] Figure 3 This is a schematic diagram of the structure of a multi-station detection mechanism in a spindle stiffness detection device;

[0020] Figure 4 This is a schematic diagram of radial detection of a spindle stiffness detection device;

[0021] Figure 5 This is a schematic diagram of an axial detection device for detecting spindle stiffness.

[0022] In the figure: 1. Support frame; 2. Workbench; 3. Clamping plate; 4. Static pressure spindle; 5. Calibration motor; 6. Calibration screw; 7. Calibration slide; 8. Synchronous belt; 9. Rotary table; 10. Rotating arm; 11. Support arm; 12. Force sensor; 13. Distance sensor; 14. Clamping motor; 15. Transmission belt; 16. Clamping screw; 17. Clamping guide rail; 18. Clamping slide; 19. Rotating motor; 20. Rotating shaft; 21. Propelling handwheel; 22. Propelling slide rail; 23. Propelling screw; 24. Propelling slide. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-5The utility model provides a technical solution for a spindle stiffness detection device: a spindle stiffness detection device, comprising a support frame 1, a fixture mechanism is installed at one end of the support frame 1, the fixture mechanism comprises a tooling table 2 installed at one end of the support frame 1, the inside of the frame of the tooling table 2 is rotatably connected with a clamping screw rod 16, and both sides of the clamping screw rod 16 are symmetrically provided with clamping guide rails 17 installed on the tooling table 2, the outer side of the shaft of the clamping screw rod 16 is symmetrically sleeved with a clamping slide 18 guided by the clamping guide rail 17, and a clamping plate 3 is installed above each group of clamping slides 18, the inside of the frame of the tooling table 2 is along the clamping A clamping motor 14 is installed in the shaft direction of the screw rod 16, and the clamping motor 14 and the clamping screw rod 16 are connected by a transmission belt 15. The clamping screw rod 16 is bounded by the center line, and the two sides of the center line are symmetrically provided with positive and negative threads opposite to the two groups of clamping slides 18. By controlling the operation of the clamping motor 14, the clamping screw rod 16 is driven to rotate under the transit transmission of the transmission belt 15, and the positive and negative threads on the clamping screw rod 16 are used to push the relative clamping slides 18 to move in opposite directions along the clamping guide rail 17, and then push the clamping plates 3 to clamp, and mechanically clamp and fix the hydrostatic spindle 4 to perform stiffness detection on the hydrostatic spindle 4.

[0025] The two sides of the support frame 1 are symmetrically connected with calibration screws 6, and the outer sides of the shafts of the two groups of calibration screws 6 are symmetrically sleeved with horizontally opposite calibration slides 7. One side of the support frame 1 is provided with a calibration motor 5 that drives one group of calibration screws 6, and the two opposite groups of calibration screws 6 are connected by a synchronous belt 8. By controlling the operation of the calibration motor 5 and under the linkage transmission of the synchronous belt 8, the two groups of calibration screws 6 are driven to operate in linkage, pushing the corresponding calibration slide 7 to slide horizontally, and then pushing the multi-station detection mechanism to move horizontally, and the multi-station detection mechanism is moved close to the pressing spindle 4 for stiffness detection.

[0026] A multi-station detection mechanism is installed between the two opposite sets of calibration slides 7. The multi-station detection mechanism includes a rotating table 9 installed between the two sets of calibration slides 7. A rotating motor 19 is installed in the middle of the base frame of the rotating table 9, and a rotating shaft 20 is installed at the output end of the rotating motor 19. A rotating arm 10 is installed at the top of the shaft of the rotating shaft 20. The support arms of the rotating arm 10 are sequentially provided with a propulsion slide 22 and a propulsion screw 23 from bottom to top, and the outer side of the shaft of the propulsion screw 23 is provided with a propulsion slide 24 guided by the propulsion slide 22. The upper end of the frame of the propulsion slide 24 is provided with a support arm 11. A propulsion handwheel 21 is installed at one end of the shaft of the propulsion screw 23. By controlling the operation of the rotating motor 19, the combination of the rotating shaft 20 and the rotating arm 10 is driven to rotate and swing, so that the combination of the force sensor 12 and the distance sensor 13 is detected in a radial or axial state relative to the static pressure main shaft 4. Then, by rotating the propulsion handwheel 21, the propulsion screw 23 is driven to rotate, and the propulsion slide 24 is pushed to slide along the propulsion slide rail 22, so that the force sensor 12 is applied close to the static pressure main shaft 4 to apply pressure, and the distance sensing of the distance sensor 13 is used to perform axial or radial stiffness detection.

[0027] A force sensor 12 is provided at the top of the support arm 11, and a distance sensor 13 is symmetrically provided above the support arm of the rotating arm 10 along the sliding direction of the propulsion slide 24 and opposite to the force sensor 12. The sensing direction of the distance sensor 13 is the same as the force direction of the force sensor 12. The force sensor 12 is used to apply pressure to the static pressure main shaft 4. While applying force, the distance sensing of the distance sensor 13 is used to monitor the distance change of the static pressure main shaft 4. The values ​​of force and distance change are used to analyze and detect its stiffness and stress.

[0028] The working principle of the present invention is as follows: when the rigidity detection device is used to detect the rigidity of the static pressure main shaft 4, the static pressure main shaft 4 is hung on the workbench 2, and the combined operation of the clamping motor 14 and the transmission belt 15 is controlled to drive the clamping screw rod 16 to rotate, and the positive and negative threads on the clamping screw rod 16 are used to push the relative clamping slide 18 to move in opposite directions along the clamping guide rail 17, and then push the clamping plate 3 to clamp, so as to mechanically clamp and fix the static pressure main shaft 4;

[0029] After the static pressure spindle 4 is clamped and fixed, the calibration motor 5 is controlled to work, and under the linkage transmission of the synchronous belt 8, the two sets of calibration screws 6 are driven to operate in a linkage manner, pushing the corresponding calibration slide 7 to slide horizontally, and then pushing the multi-station detection mechanism to move horizontally, and the multi-station detection mechanism is brought close to the static pressure spindle 4 to perform stiffness detection work;

[0030] Then, when the radial state detection work is carried out (as shown in the attached manual Figure 4As shown in the figure, the force sensor 12 and the distance sensor 13 are aligned with the shaft of the static pressure main shaft 4. Then, by turning the propulsion hand wheel 21, the propulsion screw 23 is driven to rotate, and the propulsion slide 24 is pushed along the propulsion slide rail 22. The force sensor 12 is brought close to the static pressure main shaft 4 to apply pressure. While applying force, the distance sensor 13 is used to monitor the distance change of the static pressure main shaft 4. The force and distance change values ​​are used to analyze and detect the stiffness and stress of the static pressure main shaft;

[0031] And when the axial state detection work is carried out (as shown in the attached manual Figure 5 As shown), by controlling the operation of the rotating motor 19, the combined rotation of the rotating shaft 20 and the rotating arm 10 is driven to rotate and swing, and the force sensor 12 and the distance sensor 13 are aligned with the shaft head of the hydrostatic spindle 4 to perform axial stiffness detection on the hydrostatic spindle 4. The detection is more flexible and has better modular adaptability, and can perform continuous and uninterrupted detection on the hydrostatic spindle 4.

[0032] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A spindle stiffness detection device, characterized in that: comprising a support frame (1); A fixture mechanism is installed at one end of the support frame (1); The support frame (1) has calibration screw rods (6) connected to both sides of the support frame in a symmetrical manner, and the outer sides of the shafts of the two groups of calibration screw rods (6) are symmetrically sleeved with horizontally opposed calibration slides (7), and a multi-station detection mechanism is installed between the two opposite groups of calibration slides (7); The multi-station detection mechanism includes a rotating table (9) installed between two groups of calibration slides (7), a rotating motor (19) is installed in the middle of the base frame of the rotating table (9), and a rotating shaft (20) is installed at the output end of the rotating motor (19), a rotating arm (10) is installed at the top of the shaft of the rotating shaft (20), and the support arm of the rotating arm (10) is provided with a propulsion slide (22) and a propulsion screw (23) from bottom to top, and the outer side of the shaft of the propulsion screw (23) is provided with a propulsion slide (24) guided by the propulsion slide (22), a support arm (11) is provided at the upper end of the platform of the propulsion slide (24), a force sensor (12) is provided at the top of the support arm of the support arm (11), and a distance sensor (13) opposite to the force sensor (12) is symmetrically provided above the support arm of the rotating arm (10) along the sliding direction of the propulsion slide (24).

2. A spindle stiffness detection device according to claim 1, characterized in that: One end of the shaft of the propulsion screw rod (23) is provided with a propulsion hand wheel (21).

3. A spindle stiffness detection device according to claim 1, characterized in that: The sensing direction of the distance sensor (13) is the same as the force direction of the force sensor (12).

4. A spindle stiffness detection device according to claim 1, characterized in that: A positioning motor (5) for driving one set of positioning screw rods (6) is provided on one side of the support frame (1), and the two opposite sets of positioning screw rods (6) are connected by a synchronous belt (8).

5. The spindle stiffness detection device according to claim 1, characterized in that: The tooling fixture mechanism includes a tooling table (2) installed at one end of a support frame (1), a clamping screw rod (16) is rotatably connected to the inside of the tooling table (2), and clamping guide rails (17) installed on the tooling table (2) are symmetrically arranged on both sides of the clamping screw rod (16), and a clamping slide (18) guided by the clamping guide rail (17) is symmetrically sleeved on the outer side of the shaft of the clamping screw rod (16), and a clamping plate (3) is installed above each group of clamping slides (18).

6. A spindle stiffness detection device according to claim 5, characterized in that: A clamping motor (14) is installed inside the frame of the tooling table (2) along the axis direction of the clamping screw rod (16), and the clamping motor (14) and the clamping screw rod (16) are connected by a transmission belt (15).

7. A spindle stiffness detection device according to claim 5, characterized in that: The clamping screw rod (16) is bounded by a center line, and both sides of the center line are symmetrically provided with positive and negative screw teeth opposite to the two groups of clamping slides (18).

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