B-axis power tool rest simulation loading test bench

Abstract

This invention discloses a B-axis powered tool post simulation loading test bench, comprising: a B-axis powered tool post, upper and lower radial force loading modules, left and right radial force loading modules, axial force loading modules, axial torque loading modules, a rotary loading module, a combined tool holder, and a leveling platform; the B-axis powered tool post and the rotary loading module are both mounted on the leveling platform; the upper and lower radial force loading modules, left and right radial force loading modules, axial force loading modules, and axial torque loading modules are all mounted on the rotary loading module; one end of the combined tool holder is connected to the electric spindle of the B-axis powered tool post, and the other end is connected to the axial torque loading module. This invention, through the cooperation of the upper and lower radial force loading modules, left and right radial force loading modules, axial force loading module, axial torque loading module, and rotary loading module, can achieve comprehensive simulation dynamic loading of the spindle's radial force, axial force, and reverse torque, thereby shortening the test cycle and reducing test costs.

Description

Technical Field

[0001] This invention relates to the field of mechanical testing equipment technology, and more specifically to a B-axis power tool holder simulation loading test bench. Background Technology

[0002] CNC machine tools, as the "mother machines" of industry, are not only a crucial cornerstone of the machinery manufacturing industry but also a vital indicator of a nation's industrialization. The B-axis powered tool post, a key functional component of CNC machine tools, requires long-term fatigue testing to demonstrate its accuracy, lifespan, quality, and reliability. However, conducting reliability tests on the entire CNC machine tool is not only costly but also time-consuming and labor-intensive. Therefore, combining research and testing of B-axis powered tool post technologies is of great significance for improving the quality and performance of domestically produced B-axis powered tool posts. However, existing powered tool post simulation test benches simulate only single loading conditions, requiring the use of multiple different powered tool post simulation test benches for comprehensive testing, resulting in long testing cycles and high costs. Summary of the Invention

[0003] In view of this, the present invention provides a B-axis power tool holder simulation loading test bench, the purpose of which is to solve the problems existing in the prior art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A B-axis powered tool post simulation loading test bench includes: a B-axis powered tool post, a vertical radial force loading module, a horizontal radial force loading module, an axial force loading module, an axial torque loading module, a rotary loading module, a combined tool holder, and a ground level. The B-axis powered tool post and the rotary loading module are both mounted on the ground level. The vertical radial force loading module, the horizontal radial force loading module, the axial force loading module, and the axial torque loading module are all mounted on the rotary loading module. One end of the combined tool holder is connected to the electric spindle of the B-axis powered tool post, and the other end of the combined tool holder is connected to the axial torque loading module.

[0006] Preferably, the upper and lower radial force loading module includes a first bracket; the first bracket is disposed on the rotary loading module; a first guide sleeve is provided inside the first bracket; a first electric cylinder is provided at the top of the first bracket; a first connector is provided inside the first guide sleeve; the top of the first connector is connected to the output end of the first electric cylinder, and a first guide rod is provided at the bottom of the first connector; the bottom of the first guide rod extends downward to below the first guide sleeve and is provided with a first loading seat; two symmetrically arranged first roller driven bearings are provided at the bottom of the first loading seat; the first loading seat is located above the combined tool holder; a first disc spring, a first disc spring washer, and a first annular pressure sensor are sequentially sleeved on the outer side of the first guide rod from top to bottom; the first disc spring washer is disposed at the top of the first annular pressure sensor; the top of the first disc spring is sleeved on the bottom of the first connector, and the bottom of the first disc spring abuts against the top of the first disc spring washer; a first limiting ring is provided at the bottom of the first guide sleeve; the bottom of the first annular pressure sensor abuts against the top of the first limiting ring.

[0007] Preferably, the left and right radial force loading module includes a second support; the second support is disposed on the rotary loading module; a second electric cylinder is disposed on the second support; a second connector is disposed at the output end of the second electric cylinder; a second guide rod is disposed at the end of the second connector away from the second electric cylinder; a second guide sleeve is sleeved on the outside of the second connector and the second guide rod; the second guide sleeve is fixedly connected to the second electric cylinder; a second disc spring, a second disc spring washer, and a second annular pressure sensor are sleeved on the outside of the second guide rod; one end of the second disc spring is sleeved on the end of the second connector away from the second electric cylinder, and the other end of the second disc spring abuts against the side of the second disc spring washer near the second electric cylinder; the second disc spring washer is fixedly connected to the side of the second annular pressure sensor near the second electric cylinder; a second limiting ring is disposed at the end of the second guide sleeve away from the second electric cylinder; the second annular pressure sensor abuts against the side of the second limiting ring near the second electric cylinder; the end of the second guide rod away from the second electric cylinder extends to the outside of the second guide sleeve and is provided with a second loading seat; two symmetrically arranged second roller driven bearings are disposed on the side of the second loading seat away from the second guide rod.

[0008] Preferably, the axial force loading module includes a third support and a push plate; the third support is disposed on the rotary loading module; the third support is provided with two symmetrically arranged third electric cylinders; the output end of the third electric cylinder is provided with a third connector; a third disc spring is sleeved on the end of the third connector away from the third electric cylinder; the other end of the third disc spring is connected to the push plate through a third disc spring washer; a third annular pressure sensor is provided on the side of the push plate away from the third electric cylinder; a connecting sleeve is provided on the side of the third annular pressure sensor away from the push plate; a thrust roller bearing is sleeved inside the connecting sleeve; the thrust roller bearing is sleeved on the outside of the combined tool holder.

[0009] Preferably, the axial torque loading module includes a second motor; the second motor is mounted on the third support; the second motor is located between the two third electric cylinders; a second torque sensor is provided on the third support; one end of the second torque sensor is connected to the output end of the second motor, and the other end of the second torque sensor is connected to the end of the combined tool holder away from the B-axis power tool holder.

[0010] Preferably, the third support is provided with a motor base; the motor base is provided with a second reducer; the second motor is fixedly connected to the second reducer; the output end of the second motor is connected to the input end of the second reducer; the second torque sensor is fixedly connected to the third support through a sensor support base; the two ends of the second torque sensor are respectively provided with a first coupling and a second coupling; the end of the first coupling away from the second torque sensor is fixedly connected to the output end of the second reducer; the end of the second coupling away from the second torque sensor is fixedly connected to the combined tool holder.

[0011] Preferably, the rotary loading module includes a base plate; the base plate is fixedly connected to the top of the ground rail; the top of the base plate is provided with a first arc-shaped guide rail pair and a second arc-shaped guide rail pair arranged opposite to each other; the top of the first arc-shaped guide rail pair and the second arc-shaped guide rail pair are provided with an arc-shaped flat plate; the top of the arc-shaped flat plate is provided with a module support; the top of the module support is provided with a first motor; the module support is provided with a first torque sensor and a transmission shaft; the output end of the first motor is connected to the transmission shaft through the first torque sensor; the bottom end of the transmission shaft is provided with a gear; the top of the base plate is provided with an arc-shaped rack; the gear is meshed with the arc-shaped rack.

[0012] Preferably, the top of the module support is provided with a first reducer; the first motor is disposed on the top of the first reducer; the output end of the first motor is connected to the input end of the first reducer; the first torque sensor is fixedly connected to the inside of the module support through a sensor mounting bracket; a third coupling and a fourth coupling are respectively provided at both ends of the first torque sensor; the end of the third coupling away from the first torque sensor is fixedly connected to the output end of the first reducer; the end of the fourth coupling away from the first torque sensor is fixedly connected to the drive shaft.

[0013] Preferably, the top of the base plate is provided with a first track support platform and a second track support platform; the first arc-shaped guide rail pair is fixedly connected to the top of the first track support platform; and the second arc-shaped guide rail pair is fixedly connected to the top of the second track support platform.

[0014] The present invention achieves the following technical effects compared to the prior art:

[0015] 1) This invention, through the cooperation of upper and lower radial force loading modules, left and right radial force loading modules, axial force loading modules, axial torque loading modules and rotation loading modules, can realize comprehensive simulation dynamic loading of spindle radial force, axial force and reverse torque. This can more accurately simulate the axial and radial cutting forces and cutting torques experienced by the B-axis power tool post during actual machining, thereby shortening the long test cycle of the B-axis power tool post in the research and development and testing stage and reducing test costs.

[0016] 2) In this invention, both the upper and lower radial force loading modules and the left and right radial force loading modules contact the combined tool holder through roller driven bearings and apply loads, resulting in high loading accuracy. At the same time as contact loading, the roller driven bearings rotate at high speed to perform dynamic loading. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a B-axis power tool holder simulation loading test bench according to the present invention;

[0018] Figure 2 A schematic diagram of the B-axis power tool holder and the pad block;

[0019] Figure 3 This is a structural schematic diagram of the upper and lower radial force loading module;

[0020] Figure 4 This is a structural schematic diagram of the left and right radial force loading module;

[0021] Figure 5 This is a structural schematic diagram of the axial force loading module and the axial torque loading module;

[0022] Figure 6 This is a cross-sectional view of the axial force loading module;

[0023] Figure 7 This is a schematic diagram of the rotary loading module.

[0024] Figure 8 This is a cross-sectional view of the rotary loading module;

[0025] Figure 9 This is a flowchart of the simulated loading test steps of the present invention;

[0026] In the diagram: 1. B-axis power tool post; 2. Upper and lower radial force loading module; 201. First bracket; 202. First electric cylinder; 203. First connector; 204. First guide sleeve; 205. First disc spring; 206. First disc spring washer; 207. First annular pressure sensor; 208. First loading seat; 209. First roller driven bearing; 210. First guide rod; 3. Left and right radial force loading module; 301. Second support; 302. Second electric cylinder 303. Second connector; 304. Second guide sleeve; 305. Second disc spring; 306. Second disc spring washer; 307. Second annular pressure sensor; 308. Second loading seat; 309. Second roller driven bearing; 310. Second guide rod; 4. Axial force loading module; 401. Third electric cylinder; 402. Third connector; 403. Third disc spring; 404. Third disc spring washer; 405. Push plate; 406. Third annular pressure sensor ; 407. Connecting sleeve; 408. Thrust roller bearing; 409. Third support; 5. Axial torque loading module; 501. Second motor; 502. Second reducer; 503. Motor mount; 504. First coupling; 505. Sensor support; 506. Second torque sensor; 507. Second coupling; 6. Rotary loading module; 601. First motor; 602. First reducer; 603. Module support; 604. Third coupling; 60 5. First torque sensor; 606. Sensor mounting bracket; 607. Fourth coupling; 608. Second arc-shaped guide rail pair; 609. Second track support platform; 610. Arc-shaped flat plate; 611. Drive shaft; 612. Gear; 613. First arc-shaped guide rail pair; 614. First track support platform; 615. Base plate; 616. Arc-shaped rack; 7. Combined tool holder; 701. Tool holder connecting rod; 702. Test tool holder body; 8. Ground leveling iron; 9. Pad block. Detailed Implementation

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

[0028] Example

[0029] Reference Figure 1-8 As shown, this invention discloses a B-axis powered tool holder simulation loading test bench, comprising: a B-axis powered tool holder 1, an upper and lower radial force loading module 2, a left and right radial force loading module 3, an axial force loading module 4, an axial torque loading module 5, a rotary loading module 6, a combined tool holder 7, and a ground level 8; the B-axis powered tool holder 1 and the rotary loading module 6 are both mounted on the ground level 8; the upper and lower radial force loading module 2, the left and right radial force loading module 3, the axial force loading module 4, and the axial torque loading module 5 are all mounted on the rotary loading module 6; one end of the combined tool holder 7 is connected to the electric spindle of the B-axis powered tool holder 1, and the other end of the combined tool holder 7 is connected to the axial torque loading module 5.

[0030] The above technical solution, through the cooperation of upper and lower radial force loading modules, left and right radial force loading modules, axial force loading modules, axial torque loading modules, and rotational loading modules, can achieve comprehensive simulation of dynamic loading of spindle radial force, axial force, and reverse torque. This enables a relatively accurate simulation of the axial and radial cutting forces and cutting torque experienced by the B-axis power tool holder during actual machining. Consequently, it solves the problems of long test cycles and high costs in the research and development and testing phases of B-axis power tool holders, as well as the lack of reference sources in the current loading and testing methods for B-axis power tool holder testing devices.

[0031] In this embodiment, the upper and lower radial force loading module 2 includes a first bracket 201; the first bracket 201 is disposed on the rotary loading module 6; a first guide sleeve 204 is provided inside the first bracket 201; a first electric cylinder 202 is provided at the top of the first bracket 201; a first connector 203 is provided inside the first guide sleeve 204; the top of the first connector 203 is connected to the output end of the first electric cylinder 202, and a first guide rod 210 is provided at the bottom of the first connector 203; the bottom of the first guide rod 210 extends downward to below the first guide sleeve 204 and is provided with a first loading seat 208; two first roller driven bearings 209 are provided at the bottom of the first loading seat 208; the first roller driven bearings 209 are symmetrically arranged; the first loading seat 208 is located above the combined tool holder 7; a first disc spring 205, a first disc spring washer 206, and a first annular pressure sensor 207 are sequentially sleeved on the outside of the first guide rod 210 from top to bottom; the first disc spring washer 206 is disposed at the top of the first annular pressure sensor 207; the top of the first disc spring 205 is sleeved with... The first connector 203 is located at the bottom end, and the bottom end of the first disc spring 205 abuts against the top end of the first disc spring washer 206; the bottom end of the first guide sleeve 204 is provided with a first limiting ring; the bottom end of the first annular pressure sensor 207 abuts against the top end of the first limiting ring; in use, the first electric cylinder 202 drives the first connector 203 to move downward, the first connector 203 drives the first guide rod 210 to move downward, the first guide rod 210 drives the first loading seat 208 to move downward, the first loading seat 208 drives the two first roller driven bearings 209 to move downward, the two first roller driven bearings 209 abut against the combined tool holder 7 and apply load, thereby realizing the loading of radial force on the upper and lower positions of the B-axis power tool holder. During this process, the first connector 203 presses the first disc spring 205 downward, and the first disc spring 205 applies force to the first annular pressure sensor 207 through the first disc spring washer 206, so that the magnitude of the load applied to the combined tool holder 7 by the upper and lower radial force loading module 2 can be detected by the first annular pressure sensor 207.

[0032] In this embodiment, a first V-groove is provided at the middle position of the bottom end of the first loading seat 208; the first roller driven bearing 209 is symmetrically arranged on the left and right sides of the first V-groove.

[0033] In this embodiment, the first roller driven bearing 209 is fastened to the first loading seat 208 by the cooperation of the first external threaded rod, upper and lower flat washers and upper and lower hexagonal nuts.

[0034] In this embodiment, the left and right radial force loading module 3 includes a second support 301; the second support 301 is disposed on the rotary loading module 6; a second electric cylinder 302 is disposed on the second support 301; a second connector 303 is disposed at the output end of the second electric cylinder 302; a second guide rod 310 is disposed at the end of the second connector 303 away from the second electric cylinder 302; a second guide sleeve 304 is sleeved on the outer side of the second connector 303 and the second guide rod 310; the second guide sleeve 304 is fixedly connected to the second electric cylinder 302; the second guide rod 310... A second disc spring 305, a second disc spring washer 306, and a second annular pressure sensor 307 are sleeved on the outer side of the second connector 303. One end of the second disc spring 305 is sleeved on the end of the second connector 303 away from the second electric cylinder 302, and the other end of the second disc spring 305 abuts against the side of the second disc spring washer 306 near the second electric cylinder 302. The second disc spring washer 306 is fixedly connected to the side of the second annular pressure sensor 307 near the second electric cylinder 302. A second guide sleeve 304 has a second limiting ring at the end away from the second electric cylinder 302. The second annular pressure sensor... Sensor 307 abuts against the second limiting ring near the second electric cylinder 302; the second guide rod 310 extends away from the second electric cylinder 302 to the outside of the second guide sleeve 304 and is provided with a second loading seat 308; the second loading seat 308 is provided with two symmetrically arranged second roller driven bearings 309 on the side away from the second guide rod 310; in use, the second electric cylinder 302 drives the second connector 303 to move left and right, the second connector 303 drives the second guide rod 310 to move left and right, and the second guide rod 310 drives the second loading seat 309 to move left and right. 8. Moving left and right, the second loading seat 308 drives the second roller driven bearing 309, causing the second roller driven bearing 309 to abut against the combined tool holder 7 and apply a load, thereby realizing the loading of radial force in the left and right directions of the B-axis power tool holder. During this process, the second connector 303 squeezes the second disc spring 305, and the second disc spring 305 applies a force to the second annular pressure sensor 307 through the second disc spring washer 306. Thus, the magnitude of the load applied to the combined tool holder 7 by the left and right radial force loading module 3 can be detected by the second annular pressure sensor 307.

[0035] In this embodiment, a second V-groove is provided at the middle position of the bottom end of the second loading seat 308; the second roller driven bearing 309 is symmetrically arranged on the left and right sides of the second V-groove.

[0036] In this embodiment, the second roller driven bearing 309 is fastened to the second loading seat 308 by the cooperation of the second external threaded rod, left and right flat washers and left and right hexagonal nuts.

[0037] In this embodiment, the axial force loading module 4 includes a third support 409 and a push plate 405; the third support 409 is disposed on the rotary loading module 6; the third support 409 is provided with two third electric cylinders 401 arranged symmetrically on the left and right; the output end of the third electric cylinder 401 is provided with a third connector 402; a third disc spring 403 is sleeved on one end of the third connector 402 away from the third electric cylinder 401; the other end of the third disc spring 403 is connected to the push plate 405 through a third disc spring washer 404; a third annular pressure sensor 406 is provided on the side of the push plate 405 away from the third electric cylinder 401; a connecting sleeve 407 is provided on the side of the third annular pressure sensor 406 away from the push plate 405; a thrust roller bearing 408 is fixedly sleeved on the inner side of the connecting sleeve 407; the inner ring of the thrust roller bearing 408 is fixedly sleeved on the outer side of the tool holder connecting rod 701 of the combined tool holder 7; the tool holder connecting rod 701 is provided with a connection to the thrust roller bearing 408. The annular limiting stage, which cooperates with the 408, is used to limit the connecting sleeve 407. During use, the third electric cylinder 401 drives the push plate 405 to move along the central axis of the combined tool holder 7 via the third disc spring 403 and the third disc spring washer 404. The push plate 405 then drives the connecting sleeve 407 to move along the central axis of the combined tool holder 7, thus achieving a fixed value loading of axial thrust or tension on the B-axis power tool holder. The connecting sleeve of the thrust roller bearing adopts a through-hole design, using the connecting sleeve to limit the thrust roller bearing, which improves machining accuracy, coaxiality, and bearing life. Multiple positioning and fine-tuning structures are designed in the B-axis power tool holder and axial force loading module to facilitate the alignment and adjustment of the B-axis power tool holder electric spindle and axial loading device during assembly. This ensures the test bench meets testing and process requirements, facilitates machining, assembly, and operation, and provides accurate loading, making it highly practical.

[0038] The above technical solution uses two third electric cylinders to correct the deviation of the power center from the loading center. After the third electric cylinder, which is in an eccentric position, is corrected by the thrust roller bearing, it transmits the force to the loading center position without generating an additional eccentric bending moment, thereby maximizing the axial loading of the B-axis power tool holder.

[0039] In this embodiment, the axial torque loading module 5 includes a second motor 501; the second motor 501 is mounted on a third support 409; the second motor 501 is located between two third electric cylinders 401; a second torque sensor 506 is mounted on the third support 409; one end of the second torque sensor 506 is connected to the output end of the second motor 501, and the other end of the second torque sensor 506 is connected to the end of the combined tool holder 7 away from the B-axis power tool holder 1; in use, the second motor 501 drives the combined tool holder 7 to rotate through the second torque sensor 506, thereby realizing torque loading on the B-axis power tool holder 1.

[0040] In this embodiment, a motor mount 503 is provided on the third support 409; a second reducer 502 is provided on the motor mount 503; a second motor 501 is fixedly connected to the second reducer 502; the output end of the second motor 501 is connected to the input end of the second reducer 502; a second torque sensor 506 is fixedly connected to the third support 409 through a sensor support 505; a first coupling 504 and a second coupling 507 are respectively provided at both ends of the second torque sensor 506; the end of the first coupling 504 away from the second torque sensor 506 is fixedly connected to the output end of the second reducer 502; the end of the second coupling 507 away from the second torque sensor 506 is fixedly connected to the tool holder connecting rod 701 on the combined tool holder 7.

[0041] In this embodiment, the rotary loading module 6 includes a base plate 615; the base plate 615 is fixedly connected to the top of the ground plane 8; the base plate 615 is arranged opposite to the B-axis power tool holder 1; the base plate 615 has an arc-shaped structure; the top of the base plate 615 is provided with a first arc-shaped guide rail pair 613 and a second arc-shaped guide rail pair 608 arranged opposite to each other; the top of the first arc-shaped guide rail pair 613 and the second arc-shaped guide rail pair 608 is provided with an arc-shaped flat plate 610; the top of the arc-shaped flat plate 610 is provided with a module support 603; the top of the module support 603 is provided with a first motor 601; the module support 603 is provided with a first torque sensor 605 and a drive shaft 611 inside; the output end of the first motor 601 is connected to the drive shaft 611 through the first torque sensor 605; the drive shaft 611 The bottom end is provided with a gear 612; the top end of the base plate 615 is provided with an arc-shaped rack 616; the gear 612 meshes with the arc-shaped rack 616; in use, the first motor 601 drives the transmission shaft 611 to rotate through the first torque sensor 605, the transmission shaft 611 drives the gear 612 to rotate, the gear 612 meshes with the arc-shaped rack 616, so that the gear 612 moves along the arc-shaped rack, thereby driving the arc-shaped plate 610 to move along the first arc-shaped guide rail pair 613 and the second arc-shaped guide rail pair 608, and then driving the upper and lower radial force loading module 2, the left and right radial force loading module 3, the axial force loading module 4 and the axial torque loading module 5 on the arc-shaped plate 610 to move together, so as to realize the torque loading of the B-axis of the B-axis power tool holder.

[0042] In this embodiment, a first reducer 602 is provided at the top of the module support 603; a first motor 601 is provided at the top of the first reducer 602; the output end of the first motor 601 is connected to the input end of the first reducer 602; a first torque sensor 605 is fixedly connected to the inside of the module support 603 through a sensor mounting bracket 606; a third coupling 604 and a fourth coupling 607 are respectively provided at both ends of the first torque sensor 605; the end of the third coupling 604 away from the first torque sensor 605 is fixedly connected to the output end of the first reducer 602; the end of the fourth coupling 607 away from the first torque sensor 605 is fixedly connected to the drive shaft 611.

[0043] In this embodiment, the drive shaft 611 is rotatably connected to the module support 603 via bearings and an end cap.

[0044] In this embodiment, the top of the base plate 615 is provided with a first track support platform 614 and a second track support platform 609; the first arc-shaped guide rail pair 613 is fixedly connected to the top of the first track support platform 614; and the second arc-shaped guide rail pair 608 is fixedly connected to the top of the second track support platform 609.

[0045] In this embodiment, the first arc-shaped guide rail pair 613 includes a first arc-shaped guide rail and two first sliders slidably connected to the first arc-shaped guide rail; the first arc-shaped guide rail is fixedly connected to the top of the first track support platform 614; and the first sliders are fixedly connected to the bottom of the arc-shaped flat plate 610.

[0046] In this embodiment, the second arc-shaped guide rail pair 608 includes a second arc-shaped guide rail and two second sliders slidably connected to the second arc-shaped guide rail; the second arc-shaped guide rail is fixedly connected to the top of the second track support platform 609; and the second sliders are fixedly connected to the bottom of the arc-shaped flat plate 610.

[0047] In this embodiment, the first bracket 201, the second support 301 and the third support 409 are all fixedly connected to the top of the arc-shaped plate 610.

[0048] In this embodiment, a pad 9 is fixedly connected to the top of the ground plane 8; the B-axis power tool holder 1 is fixedly connected to the pad 9.

[0049] In this embodiment, pads are provided at all four corners of the pad 9; U-shaped grooves are provided on the pads; the pad 9 is fixedly connected to the top of the ground iron 8 by the U-shaped grooves and T-shaped screws; the pads are provided with adjusting bolts to assist in the alignment adjustment of the electric spindle of the B-axis power tool holder and the axial torque loading module during the assembly of the test bench.

[0050] In this embodiment, the combined tool holder 7 includes a tool holder connecting rod 701 and a test tool holder body 702; the tool holder connecting rod 701 is connected to the test tool holder body 702; the end of the test tool holder body 702 away from the tool holder connecting rod 701 is connected to the electric spindle of the B-axis power tool holder 1; the end of the tool holder connecting rod 701 away from the test tool holder body 702 is connected to the second coupling 507.

[0051] Loading process:

[0052] When both the B-axis portion and the spindle portion of the B-axis power tool holder 1 are in the gear plate locking state, it is the static loading test condition of the electric spindle. Under the action of the control system, the first electric cylinder 202 and the second electric cylinder 302 apply vertical and horizontal radial forces to the combined tool holder 7 through the first roller driven bearing 209 and the second roller driven bearing 309, respectively. The two third electric cylinders 401 apply axial forces to the combined tool holder 7 through the thrust roller bearing 408. The static limit load of the B-axis power tool holder 1 under loading in different directions is tested respectively.

[0053] When the B-axis gear plate is locked, the B-axis hydraulically locked, and the B-axis motor torque locked, it is the static loading test condition of the B-axis. Under the action of the control system, the first motor 601 and the first reducer 602 drive the arc plate 610 to rotate through the meshing of the gear 612 and the arc rack 616, which in turn drives the combined tool holder 7 to rotate, providing a torque in the opposite direction to the B-axis, and testing the B-axis limit torque of the B-axis power tool holder 1.

[0054] When the B-axis portion and spindle portion of the B-axis power tool holder 1 are in an active state, under reliable loading conditions, the second electric cylinder 302 applies radial force to the combined tool holder 7 via the second roller driven bearing 309 under the control system. The two third electric cylinders 401 simultaneously apply axial force to the combined tool holder 7 via the thrust roller bearing 408. The second motor 501 and the second reducer 502 are connected to the combined tool holder 7 via the second coupling 507 and transmit torque to the electric spindle of the B-axis power tool holder 1 via a flat key. The first motor 601 and the first reducer 602 drive the arc plate 610 to rotate via the meshing of the gear 612 and the arc rack 616, thereby driving the combined tool holder 7 to rotate and providing a reverse torque to the B-axis of the B-axis power tool holder 1. The combined synergistic effect of the four components achieves simulated actual working condition loading of the B-axis power tool holder 1.

[0055] Experimental principle:

[0056] Reference Figure 9As shown, during the static loading detection of the electric spindle, only the corresponding module motor driver needs to be started individually under the control system to apply a static ultimate load to the B-axis power tool holder 1; during the B-axis static loading detection, only the motor driver of the rotary loading module 6 needs to be started individually under the control system to apply an ultimate torque load to the B-axis of the B-axis power tool holder 1; during the reliability loading, the loading method needs to be based on the loading load spectrum, which is calculated based on the dynamic cutting load analysis of the machining conditions. The load spectrum will apply a static ultimate load to the B-axis power tool holder 1. The test time ti corresponding to the rotational speed spectrum Ni, radial force load spectrum Ri, axial force load spectrum Zi, electric spindle torque load spectrum Ti, and B-axis torque load spectrum Bi of frame 1 are integrated together. For example, the electric spindle starts to rotate at a speed of N1. At this time, the actual radial force on the electric spindle at this speed is R1, the axial force is Z1, the electric spindle torque is T1, and the B-axis torque is B1. After this part of the integrated loading process, the rotational speed is changed after the time period t1, and the loading of N2, R2, Z2, T2, and B2 corresponding to the next time period T2 begins. The subsequent process is similar.

[0057] Experimental procedure:

[0058] At the start of the test, the corresponding loading program is used according to the loading conditions. For example, in the reliability loading condition, the load spectrum program is started first. The loading command of the load spectrum will control the left and right radial force loading module 3, axial force loading module 4, axial torque loading module 5 and rotary loading module 6 to work simultaneously through the loading control system, jointly applying four loads to the combined tool holder 7, thereby indirectly simulating the load state of the B-axis power tool holder 1 under actual working conditions. During this process, each annular pressure sensor, each torque sensor and each sensor that detects the performance of the B-axis power tool holder 1 will monitor and collect various state characteristics of the B-axis power tool holder 1 in real time and feed them back to the data acquisition and monitoring system. Moreover, the annular force sensor and torque sensor will feed back the force and torque loading status to the loading control system in real time, so that the loading control system can adjust the force and torque loading in real time, thereby making the entire loading cycle more accurate.

[0059] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A B-axis dynamic tool post simulation loading test bench, characterized in that, include: The B-axis power tool holder (1), the upper and lower radial force loading module (2), the left and right radial force loading module (3), the axial force loading module (4), the axial torque loading module (5), the rotary loading module (6), the combined tool holder (7), and the ground plate (8); the B-axis power tool holder (1) and the rotary loading module (6) are both mounted on the ground plate (8); the upper and lower radial force loading module (2), the left and right radial force loading module (3), the axial force loading module (4), and the axial torque loading module (5) are all mounted on the rotary loading module (6); one end of the combined tool holder (7) is connected to the electric spindle of the B-axis power tool holder (1), and the other end of the combined tool holder (7) is connected to the axial torque loading module (5); The upper and lower radial force loading module (2) includes a first bracket (201); the first bracket (201) is disposed on the rotary loading module (6); a first guide sleeve (204) is provided inside the first bracket (201); a first electric cylinder (202) is provided at the top of the first bracket (201); a first connector (203) is provided inside the first guide sleeve (204); the top of the first connector (203) is connected to the output end of the first electric cylinder (202), and a first guide rod (210) is provided at the bottom of the first connector (203); the bottom of the first guide rod (210) extends downward to below the first guide sleeve (204) and is provided with a first loading seat (208); the bottom of the first loading seat (208) is provided with two A first roller driven bearing (209) is symmetrically arranged; the first loading seat (208) is located above the combined tool holder (7); the first guide rod (210) is fitted with a first disc spring (205), a first disc spring washer (206) and a first annular pressure sensor (207) from top to bottom on the outer side; the first disc spring washer (206) is disposed on the top of the first annular pressure sensor (207); the top of the first disc spring (205) is fitted on the bottom of the first connector (203), and the bottom of the first disc spring (205) abuts against the top of the first disc spring washer (206); the bottom of the first guide sleeve (204) is provided with a first limiting ring; the bottom of the first annular pressure sensor (207) abuts against the top of the first limiting ring.

2. The B-axis dynamic tool post simulation loading test bench according to claim 1, characterized in that, The left and right radial force loading module (3) includes a second support (301); the second support (301) is disposed on the rotary loading module (6); a second electric cylinder (302) is disposed on the second support (301); a second connector (303) is disposed at the output end of the second electric cylinder (302); a second guide rod (310) is disposed at the end of the second connector (303) away from the second electric cylinder (302); a second guide sleeve (304) is sleeved on the outside of the second connector (303) and the second guide rod (310); the second guide sleeve (304) is fixedly connected to the second electric cylinder (302); a second disc spring (305), a second disc spring washer (306), and a second annular pressure sensor (307) are sleeved on the outside of the second guide rod (310); one end of the second disc spring (305) is sleeved on the second connector (303) away from the second electric cylinder (302). One end of the second electric cylinder (302) and the other end of the second disc spring (305) abut against the side of the second disc spring washer (306) near the second electric cylinder (302); the second disc spring washer (306) is fixedly connected to the side of the second annular pressure sensor (307) near the second electric cylinder (302); the second guide sleeve (304) is provided with a second limiting ring at the end away from the second electric cylinder (302); the second annular pressure sensor (307) abuts against the side of the second limiting ring near the second electric cylinder (302); the second guide rod (310) extends to the outside of the second guide sleeve (304) at the end away from the second electric cylinder (302) and is provided with a second loading seat (308); the second loading seat (308) is provided with two symmetrically arranged second roller driven bearings (309) on the side away from the second guide rod (310).

3. The B-axis dynamic tool post simulation loading test bench according to claim 1, characterized in that, The axial force loading module (4) includes a third support (409) and a push plate (405); the third support (409) is mounted on the rotary loading module (6); the third support (409) is provided with two symmetrically arranged third electric cylinders (401); the output end of the third electric cylinder (401) is provided with a third connector (402); a third disc spring (403) is sleeved on the end of the third connector (402) away from the third electric cylinder (401); the third disc spring (405) 03) The other end is connected to the push plate (405) via the third disc spring washer (404); the push plate (405) is provided with a third annular pressure sensor (406) on the side away from the third electric cylinder (401); the third annular pressure sensor (406) is provided with a connecting sleeve (407) on the side away from the push plate (405); a thrust roller bearing (408) is sleeved on the inner side of the connecting sleeve (407); the thrust roller bearing (408) is sleeved on the outer side of the combined tool holder (7).

4. The B-axis dynamic tool post simulation loading test bench according to claim 3, characterized in that, The axial torque loading module (5) includes a second motor (501); the second motor (501) is mounted on the third support (409); the second motor (501) is located between the two third electric cylinders (401); a second torque sensor (506) is provided on the third support (409); one end of the second torque sensor (506) is connected to the output end of the second motor (501), and the other end of the second torque sensor (506) is connected to the end of the combined tool holder (7) away from the B-axis power tool holder (1).

5. The B-axis dynamic tool post simulation loading test bench according to claim 4, characterized in that, The third support (409) is provided with a motor base (503); the motor base (503) is provided with a second reducer (502); the second motor (501) is fixedly connected to the second reducer (502); the output end of the second motor (501) is connected to the input end of the second reducer (502); the second torque sensor (506) is fixedly connected to the third support (409) through a sensor support base (505); the two ends of the second torque sensor (506) are respectively provided with a first coupling (504) and a second coupling (507); the end of the first coupling (504) away from the second torque sensor (506) is fixedly connected to the output end of the second reducer (502); the end of the second coupling (507) away from the second torque sensor (506) is fixedly connected to the combined tool holder (7).

6. The B-axis dynamic tool post simulation loading test bench according to claim 1, characterized in that, The rotary loading module (6) includes a base plate (615); the base plate (615) is fixedly connected to the top of the ground rail (8); the top of the base plate (615) is provided with a first arc-shaped guide rail pair (613) and a second arc-shaped guide rail pair (608) arranged opposite to each other; the top of the first arc-shaped guide rail pair (613) and the second arc-shaped guide rail pair (608) is provided with an arc-shaped flat plate (610); the top of the arc-shaped flat plate (610) is provided with a module support (603); the module support (603) is provided with a module support (603). 3) A first motor (601) is provided at the top; a first torque sensor (605) and a drive shaft (611) are provided inside the module support (603); the output end of the first motor (601) is connected to the drive shaft (611) through the first torque sensor (605); a gear (612) is provided at the bottom end of the drive shaft (611); an arc-shaped rack (616) is provided at the top of the base plate (615); the gear (612) is meshed with the arc-shaped rack (616).

7. The B-axis dynamic tool post simulation loading test bench according to claim 6, characterized in that, The top of the module support (603) is provided with a first reducer (602); the first motor (601) is provided at the top of the first reducer (602); the output end of the first motor (601) is connected to the input end of the first reducer (602); the first torque sensor (605) is fixedly connected to the inside of the module support (603) through a sensor mounting bracket (606); the first torque sensor (605) is provided with a third coupling (604) and a fourth coupling (607) at both ends respectively; the end of the third coupling (604) away from the first torque sensor (605) is fixedly connected to the output end of the first reducer (602); the end of the fourth coupling (607) away from the first torque sensor (605) is fixedly connected to the drive shaft (611).

8. The B-axis dynamic tool post simulation loading test bench according to claim 6, characterized in that, The top of the base plate (615) is provided with a first track support platform (614) and a second track support platform (609); the first arc-shaped guide rail pair (613) is fixedly connected to the top of the first track support platform (614); the second arc-shaped guide rail pair (608) is fixedly connected to the top of the second track support platform (609).

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