Simulation loading test bed for B-axis power tool rest

Abstract

The invention discloses a B-axis power knife rest simulation loading test bench which comprises a B-axis power knife rest, an up-down radial force loading module, a left-right radial force loading module, an axial force loading module, an axial torque loading module, a rotary loading module, a combined knife handle and horizon iron. The B-axis power tool rest and the rotary loading module are both arranged on the horizontal iron; the up-down radial force loading module, the left-right radial force loading module, the axial force loading module and the axial torque loading module are all arranged on the rotary loading module; one end of the combined knife handle is connected with an electric main shaft of the B-axis power knife rest, and the other end of the combined knife handle is connected with the torque loading module. Through cooperation of the up-down radial force loading module, the left-right radial force loading module, the axial force loading module, the axial torque loading module and the rotary loading module, comprehensive simulation dynamic loading of the radial force, the axial force and the reverse torque of the main shaft can be realized, so that the test period can be shortened, and the test cost can be reduced.

Description

Technical Field

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

[0002] As the mother machine of industry, CNC machine tools are not only an important cornerstone for the development of the machinery manufacturing industry, but also an important indicator for measuring a country's industrialization. As one of the key functional components of CNC machine tools, the B-axis power tool holder's accuracy, life, quality and reliability level can only be revealed after long-term fatigue loading. However, it is not only costly but also time-consuming and labor-intensive to put it on the entire CNC machine tool for reliability testing. Therefore, combining the research and testing of B-axis power tool holder related technologies is of great significance to improving the quality and performance of domestic B-axis power tool holders. However, the existing power tool holder simulation test bench has a single simulated loading condition, and multiple different power tool holder simulation test benches need to be used for comprehensive testing during the test, which has problems such as long test cycle and high test cost. 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] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A B-axis power tool holder simulation loading test bench comprises: a B-axis power tool holder, an upper and lower radial force loading module, a left and right radial force loading module, an axial force loading module, an axial torque loading module, a rotation loading module, a combined tool holder and a ground iron; the B-axis power tool holder and the rotation loading module are both arranged on the ground iron; the upper and lower radial force loading modules, the left and right radial force loading modules, the axial force loading module and the axial torque loading module are all arranged on the rotation loading module; one end of the combined tool holder is connected to the electric spindle of the B-axis power tool holder, 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 arranged on the rotation loading module; a first guide sleeve is arranged inside the first bracket; a first electric cylinder is arranged at the top of the first bracket; a first connector is arranged 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 arranged at the bottom of the first connector; the bottom end of the first guide rod extends downward to the bottom of the first guide sleeve and is provided with a first loading seat; two symmetrically arranged first roller follower bearings are arranged at the bottom of the first loading seat; the first loading seat is located above the combined tool handle; the outer side of the first guide rod is sequentially sleeved with a first disc spring, a first disc spring gasket and a first annular pressure sensor from top to bottom; the first disc spring gasket is arranged 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 gasket; a first limiting ring is arranged at the bottom of the first guide sleeve; the bottom end 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 arranged on the rotation loading module; a second electric cylinder is arranged on the second support; a second connector is arranged at the output end of the second electric cylinder; a second guide rod is arranged at the end of the second connector away from the second electric cylinder; a second guide sleeve is sleeved on the outer side 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 gasket and a second annular pressure sensor are sleeved on the outer side 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 gasket close to the second electric cylinder; the second disc spring gasket is fixedly connected to the side of the second annular pressure sensor close to the second electric cylinder; a second limiting ring is arranged 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 close to the second electric cylinder; the second guide rod extends to the outside of the second guide sleeve at one end away from the second electric cylinder and is provided with a second loading seat; the second loading seat is provided with two symmetrically arranged second roller follower bearings on the side 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 arranged on the rotation loading module; two symmetrically arranged third electric cylinders are provided on the third support; a third connecting head is provided at the output end of the third electric cylinder; a third disc spring is sleeved on the end of the third connecting head 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 gasket; 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 on the inner side of the connecting sleeve; and the thrust roller bearing is sleeved on the outer side of the combined tool handle.

[0009] Preferably, the axial torque loading module includes a second motor; the second motor is arranged 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, a motor seat is provided on the third support; a second reducer is provided on the motor seat; 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 seat; a first coupling and a second coupling are respectively provided at both ends of the second torque sensor; an end of the first coupling away from the second torque sensor is fixedly connected to the output end of the second reducer; and an 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 iron; the top of the base plate is provided with a first arc guide pair and a second arc guide pair which are relatively arranged; the tops of the first arc guide pair and the second arc guide 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 inside; 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 rack; the gear is meshingly connected with the arc rack.

[0012] Preferably, a first reducer is provided at the top of the module support; the first motor is arranged at 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 fixing 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 transmission shaft.

[0013] Preferably, a first track support platform and a second track support platform are provided at the top of the base plate; 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] Compared with the prior art, the present invention has achieved the following technical effects:

[0015] 1) The present invention can realize the comprehensive simulation dynamic loading of the spindle radial force, axial force and reverse torque by cooperating with the upper and lower radial force loading modules, the left and right radial force loading modules, the axial force loading module, the axial torque loading module and the rotation loading module, so as to more accurately simulate the axial, radial cutting force and cutting torque of the B-axis power tool holder during actual processing, thereby shortening the test cycle of the B-axis power tool holder in the research and development and testing stages and reducing the test cost.

[0016] 2) In the present invention, the upper and lower radial force loading modules and the left and right radial force loading modules are in contact with the combined tool holder through roller follower bearings and apply loads, with high loading accuracy. During contact loading, the roller follower bearings rotate at high speed to perform dynamic loading. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 This is a schematic diagram of the structure of the B-axis power tool holder and the cushion block;

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

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

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

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

[0023] Figure 7 It is a structural schematic diagram of the rotation loading module;

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

[0025] Fig. 9 It is a flow chart of the simulated loading test steps of the present invention;

[0026] In the figure: 1, B-axis power tool holder; 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 gasket; 207, first annular pressure sensor; 208, first loading seat; 209, first roller follower bearing; 210, first guide rod; 3, left and right radial force loading module; 301, second bracket; 302, second electric cylinder; 303, second connector; 304, second guide sleeve; 305, second disc spring; 306, second disc spring gasket; 307, second annular pressure sensor; 308, second loading seat; 309, second roller follower 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 gasket; 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 seat; 504, first coupling; 505, sensor support seat; 506, second torque sensor; 507, second coupling; 6, rotation loading module; 601, first motor; 602, first reducer; 603, module support; 604, third coupling; 60 5. First torque sensor; 606. Sensor fixing bracket; 607. Fourth coupling; 608. Second arc guide pair; 609. Second track support platform; 610. Arc plate; 611. Transmission shaft; 612. Gear; 613. First arc guide pair; 614. First track support platform; 615. Bottom plate; 616. Arc rack; 7. Combined tool handle; 701. Tool handle connecting rod; 702. Test tool handle body; 8. Level iron; 9. Pad. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example

[0029] Reference Figure 1-8 As shown, the present invention discloses a B-axis power tool holder simulation loading test bench, comprising: a B-axis power 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 rotation loading module 6, a combined tool holder 7 and a ground iron 8; the B-axis power tool holder 1 and the rotation loading module 6 are both arranged on the ground iron 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 arranged on the rotation 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.

[0030] The above technical scheme can realize the comprehensive simulation dynamic addition of the spindle radial force, axial force and reverse torque by coordinating the upper and lower radial force loading modules, the left and right radial force loading modules, the axial force loading module, the axial torque loading module and the rotation loading module, so as to more accurately simulate the axial, radial cutting forces and cutting torques that the B-axis power tool holder is subjected to during actual processing, thereby solving the problems of long test cycle and high cost of the B-axis power tool holder in the research and development and testing stages, as well as the problem that the current loading detection method of the B-axis power tool holder test device has no reference source.

[0031] In the present embodiment, the upper and lower radial force loading module 2 comprises a first bracket 201; the first bracket 201 is arranged on the rotating loading module 6; a first guide sleeve 204 is arranged inside the first bracket 201; a first electric cylinder 202 is arranged at the top of the first bracket 201; a first connector 203 is arranged 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 arranged at the bottom of the first connector 203; the bottom end of the first guide rod 210 extends downward to the bottom of the first guide sleeve 204 and is provided with a first loading seat 208; two first roller follower bearings 209 are arranged at the bottom of the first loading seat 208; the first roller follower bearings 209 are symmetrically arranged; the first loading seat 208 is located above the combined tool handle 7; the first disc spring 205, the first disc spring gasket 206 and the first annular pressure sensor 207 are arranged in sequence on the outer side of the first guide rod 210 from top to bottom; the first disc spring gasket 206 is arranged at the top of the first annular pressure sensor 207; the top end of the first disc spring 205 is sleeved It is arranged at the bottom end of the first connecting head 203, and the bottom end of the first disc spring 205 abuts against the top end of the first disc spring gasket 206; the first guide sleeve 204 is provided with a first limiting ring at the bottom end; the bottom end of the first annular pressure sensor 207 abuts against the top end of the first limiting ring; when in use, the first electric cylinder 202 drives the first connecting head 203 to move downward, the first connecting head 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 follower bearings 209 to move downward, the two first roller follower bearings 209 abut against the combined tool handle 7 and apply load, thereby realizing the loading of radial forces in the upper and lower directions of the B-axis power tool holder. In this process, the first connecting head 203 squeezes the first disc spring 205 downward, and the first disc spring 205 applies a force to the first annular pressure sensor 207 through the first disc spring gasket 206, so that the load size applied by the upper and lower radial force loading module 2 to the combined tool handle 7 can be detected by the first annular pressure sensor 207.

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

[0033] In this embodiment, the first roller follower bearing 209 is fastened and installed on the first loading seat 208 by means of a first externally 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 arranged on the rotation loading module 6; a second electric cylinder 302 is arranged on the second support 301; a second connector 303 is arranged at the output end of the second electric cylinder 302; a second guide rod 310 is arranged at one end of the second connector 303 away from the second electric cylinder 302; a second guide sleeve 304 is arranged outside 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 is provided with a second guide sleeve 304; the second guide sleeve 304 is fixedly connected to the second electric cylinder 302; the second guide rod 310 is provided with a second guide sleeve 304; the second guide sleeve 304 is fixedly connected to the second electric cylinder 302; the second guide rod 310 is provided with a second guide sleeve 304; the second guide sleeve 310 is fixedly connected to the second electric cylinder 302; the second guide sleeve ... 0 is sleeved with a second disc spring 305, a second disc spring washer 306 and a second annular pressure sensor 307; 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 close to the second electric cylinder 302; the second disc spring washer 306 is fixedly connected to the side of the second annular pressure sensor 307 close to the second electric cylinder 302; a second limiting ring is provided at the end of the second guide sleeve 304 away from the second electric cylinder 302; the second annular pressure sensor The sensor 307 abuts against the second limiting ring on the side close to the second electric cylinder 302; the second guide rod 310 extends to the outside of the second guide sleeve 304 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 follower bearings 309 on the side away from the second guide rod 310; when 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 30 8 moves left and right, the second loading seat 308 drives the second roller follower bearing 309, so that the second roller follower bearing 309 contacts with the combined tool handle 7 and applies load, thereby realizing the loading of radial force in the left and right directions of the B-axis power tool holder. In this process, the second connecting head 303 squeezes the second disc spring 305, and the second disc spring 305 applies force to the second annular pressure sensor 307 through the second disc spring gasket 306, so that the load size applied by the left and right radial force loading module 3 to the combined tool handle 7 can be detected by the second annular pressure sensor 307.

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

[0036] In this embodiment, the second roller follower bearing 309 is fastened and installed on the second loading seat 308 by means of a second externally threaded rod, left and right flat washers and left and right hexagon 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 arranged on the rotation loading module 6; two third electric cylinders 401 arranged symmetrically on the left and right are arranged on the third support 409; the output end of the third electric cylinder 401 is provided with a third connector 402; the third connector 402 is sleeved with a third disc spring 403 at one end 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 gasket 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 provided on the inner fixed sleeve of the connecting sleeve 407; the inner ring fixed sleeve of the thrust roller bearing 408 is arranged on the outer side of the tool handle connecting rod 701 of the combined tool handle 7; the tool handle connecting rod 701 is provided with a thrust roller shaft The annular limit platform matched with the bearing 408 is used to limit the connecting sleeve 407; when in use, the third electric cylinder 401 drives the push plate 405 to move along the central axis of the combined tool handle 7 through the third disc spring 403 and the third disc spring gasket 404, and the push plate 405 drives the connecting sleeve 407 to move along the central axis of the combined tool handle 7, which can realize the constant value loading of the axial thrust or tension of the B-axis power tool holder; wherein, the connecting sleeve of the thrust roller bearing adopts a through-hole design, and the connecting sleeve is used to limit the thrust roller bearing, which can make the processing accuracy higher, the coaxiality better, and the bearing service life longer; positioning and fine-tuning structures are designed in many places on the B-axis power tool holder and the axial force loading module, so as to facilitate the centering adjustment of the B-axis power tool holder electric spindle and the axial loading device during the assembly process, so that the test bench meets the test and process requirements, is easy to process, assemble and operate, and is accurate in loading, and has strong practical value.

[0038] The above technical solution corrects the deviation of the power center from the loading center through two third electric cylinders, so that the third electric cylinder in the eccentric position transmits the force to the loading center position after the thrust roller bearing is corrected, and no additional eccentric bending moment is generated, thereby maximizing the centered loading of the axial force 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 arranged 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 handle 7 away from the B-axis power tool holder 1; when in use, the second motor 501 drives the combined tool handle 7 to rotate through the second torque sensor 506, so as to realize torque loading on the B-axis power tool holder 1.

[0040] In this embodiment, a motor base 503 is provided on the third support 409; a second reducer 502 is provided on the motor base 503; 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 the sensor support base 505; the first coupling 504 and the 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 handle connecting rod 701 on the combined tool handle 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 horizontal iron 8; the base plate 615 is arranged opposite to the B-axis power tool holder 1; the base plate 615 is an arc-shaped structure; the top of the base plate 615 is provided with a first arc-shaped guide pair 613 and a second arc-shaped guide pair 608 arranged opposite to each other; the top of the first arc-shaped guide pair 613 and the second arc-shaped guide pair 608 are 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 inside of the module support 603 is provided with a first torque sensor 605 and a transmission shaft 611; the output end of the first motor 601 is connected to the transmission shaft 611 through the first torque sensor 605; the transmission shaft 611 A gear 612 is provided at the bottom end; an arc-shaped rack 616 is provided at the top of the bottom plate 615; the gear 612 is meshedly connected with the arc-shaped rack 616; when in use, the first motor 601 drives the transmission shaft 611 to rotate through the first torque sensor 605, and the transmission shaft 611 drives the gear 612 to rotate, and the gear 612 is meshed 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 pair 613 and the second arc-shaped guide pair 608, and then driving the upper and lower radial force loading modules 2, the left and right radial force loading modules 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; the first motor 601 is arranged 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 fixing bracket 606; a third coupling 604 and a fourth coupling 607 are respectively provided at both ends of the first torque sensor 605; the third coupling 604 is fixedly connected to the output end of the first reducer 602 at one end away from the first torque sensor 605; and the fourth coupling 607 is fixedly connected to the transmission shaft 611 at one end away from the first torque sensor 605.

[0043] In this embodiment, the transmission shaft 611 is rotatably connected to the module support 603 via a bearing and an end cover.

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

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

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

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

[0049] In this embodiment, pads are provided at the four corners of the pad 9; a U-shaped groove is opened on the pad; the pad 9 is fixedly connected to the top of the level iron 8 by the U-shaped groove and T-shaped screws; an adjusting bolt is provided on the pad to assist in the centering 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 handle 7 includes a tool handle connecting rod 701 and a test tool handle body 702; the tool handle connecting rod 701 is connected to the test tool handle body 702; the end of the test tool handle body 702 away from the tool handle connecting rod 701 is connected to the electric spindle of the B-axis power tool holder 1; the end of the tool handle connecting rod 701 away from the test tool handle body 702 is connected to the second coupling 507.

[0051] Loading process:

[0052] When the B-axis part and the spindle part of the B-axis power tool holder 1 are both in the gear locking state, it is the static loading detection condition of the electric spindle. Under the action of the control system, the first electric cylinder 202 and the second electric cylinder 302 respectively load the combined tool holder 7 with radial forces up and down and left and right through the first roller follower bearing 209 and the second roller follower bearing 309, and the two third electric cylinders 401 simultaneously load the combined tool holder 7 with axial forces through the thrust roller bearing 408, respectively testing the static limit load of the B-axis power tool holder 1 under loading in different directions;

[0053] When the B-axis gear disc is locked, the B-axis hydraulic pressure is locked, and the B-axis motor torque is locked, it is the static loading detection condition of the B-axis. Under the action of the control system, the first motor 601 and the first reducer 602 are engaged with the gear 612 and the arc rack 616 to drive the arc plate 610 to rotate, and then drive the combined tool holder 7 to rotate, providing the B-axis with a torque in the opposite direction, and testing the B-axis limit torque of the B-axis power tool holder 1;

[0054] When the B-axis part and the spindle part of the B-axis power tool holder 1 are in an active state, it is a reliability loading condition. Under the action of the control system, the second electric cylinder 302 loads the combined tool holder 7 with left and right radial forces through the second roller follower bearing 309, and the two third electric cylinders 401 simultaneously load the combined tool holder 7 with axial forces through the thrust roller bearing 408. The second motor 501 and the second reducer 502 are connected to the combined tool holder 7 through the second coupling 507, and transmit torque to the electric spindle of the B-axis power tool holder 1 through a flat key. The first motor 601 and the first reducer 602 drive the arc plate 610 to rotate through the meshing cooperation of the gear 612 and the arc rack 616, and then drive the combined tool holder 7 to rotate, providing a torque in the opposite direction for the B axis of the B-axis power tool holder 1. The comprehensive synergy of the four realizes the simulated actual working condition loading of the B-axis power tool holder 1.

[0055] Test principle:

[0056] Reference Fig. 9As shown, when the electric spindle is in the static loading detection state, it is only necessary to start the corresponding module motor driver separately under the action of the control system to load the B-axis power tool holder 1 with static limit load; when the B-axis is in the static loading detection state, it is only necessary to start the motor driver of the rotary loading module 6 separately under the action of the control system to load the B-axis of the B-axis power tool holder 1 with limit torque; when it is in the reliability loading state, the loading method needs to be based on the loading load spectrum, which is calculated based on the dynamic cutting load analysis simulation of the machining condition, and the load spectrum will be the B-axis power tool The frame 1 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 and their corresponding test time ti are integrated together. For example, the electric spindle starts to rotate at a speed of N1. At this time, the actual radial force borne by 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. This part of the comprehensive loading process changes the speed after the time period t1, and starts the loading of N2, R2, Z2, T2, and B2 corresponding to the next time period T2, and the subsequent process is similar.

[0057] Test process:

[0058] At the beginning of the test, the corresponding loading program is used for loading according to the corresponding 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 modules 3, the axial force loading module 4, the axial torque loading module 5 and the rotation loading module 6 to work simultaneously through the loading control system, and jointly apply four loads to the combined tool holder 7, thereby indirectly simulating the loading state of the B-axis power tool holder 1 under actual working conditions. In this process, each annular pressure sensor, each torque sensor and each sensor for detecting 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 feedback and store them in the data acquisition and monitoring system, and the annular force sensor and torque sensor will feedback the force and torque loading conditions 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 only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A B-axis powered tool holder simulation loading test bench, characterized in that: include: A B-axis power 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 rotation loading module (6), a combined tool holder (7) and a ground iron (8); the B-axis power tool holder (1) and the rotation loading module (6) are both arranged on the ground iron (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 arranged on the rotation 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).

2. The B-axis powered tool holder simulation loading test bench according to claim 1, characterized in that: The upper and lower radial force loading module (2) comprises a first bracket (201); the first bracket (201) is arranged on the rotation loading module (6); a first guide sleeve (204) is arranged inside the first bracket (201); a first electric cylinder (202) is arranged at the top of the first bracket (201); a first connector (203) is arranged 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 arranged 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 The invention relates to a first roller follower bearing (209) symmetrically arranged; the first loading seat (208) is located above the combined knife handle (7); the first disc spring (205), the first disc spring gasket (206) and the first annular pressure sensor (207) are sequentially sleeved on the outer side of the first guide rod (210) from top to bottom; the first disc spring gasket (206) is arranged at the top of the first annular pressure sensor (207); the top of the first disc spring (205) is sleeved 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 gasket (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.

3. The B-axis powered tool holder simulation loading test bench according to claim 2, characterized in that: The left-right radial force loading module (3) comprises a second support (301); the second support (301) is arranged on the rotation loading module (6); a second electric cylinder (302) is arranged on the second support (301); a second connector (303) is arranged at the output end of the second electric cylinder (302); a second guide rod (310) is arranged at one 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); a second disc spring (305), a second disc spring gasket (306) and a second annular pressure sensor (307) are sleeved on the outer side 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) abuts against the second disc spring gasket (306) close to the second electric cylinder (302); the second disc spring gasket (306) is fixedly connected to the second annular pressure sensor (307) close to the second electric cylinder (302); the second guide sleeve (304) is provided with a second limiting ring at one end away from the second electric cylinder (302); the second annular pressure sensor (307) abuts against the second limiting ring close to the second electric cylinder (302); the second guide rod (310) extends from one end 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 follower bearings (309) at one side away from the second guide rod (310).

4. The B-axis powered tool holder simulation loading test bench according to claim 1, characterized in that: The axial force loading module (4) comprises a third support (409) and a push plate (405); the third support (409) is arranged on the rotation loading module (6); two symmetrically arranged third electric cylinders (401) are arranged on the third support (409); a third connector (402) is arranged at the output end of the third electric cylinder (401); a third disc spring (403) is sleeved on one end of the third connector (402) away from the third electric cylinder (401); the third disc spring (403) 03) The other end is connected to the push plate (405) through a third disc spring gasket (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 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 handle (7).

5. The B-axis powered tool holder simulation loading test bench according to claim 4, characterized in that: The axial torque loading module (5) comprises a second motor (501); the second motor (501) is arranged on the third support (409); the second motor (501) is located between the two third electric cylinders (401); a second torque sensor (506) is arranged 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).

6. The B-axis powered tool holder simulation loading test bench according to claim 5, characterized in that: A motor seat (503) is provided on the third support (409); a second reducer (502) is provided on the motor seat (503); 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 seat (505); a first coupling (504) and a second coupling (507) are respectively provided at two ends of the second torque sensor (506); an 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); and an end of the second coupling (507) away from the second torque sensor (506) is fixedly connected to the combined tool holder (7).

7. The B-axis powered tool holder simulation loading test bench according to claim 1, characterized in that: The rotary loading module (6) comprises a bottom plate (615); the bottom plate (615) is fixedly connected to the top of the ground iron (8); the top of the bottom plate (615) is provided with a first arc-shaped guide pair (613) and a second arc-shaped guide pair (608) which are arranged opposite to each other; the tops of the first arc-shaped guide pair (613) and the second arc-shaped guide pair (608) are 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 (60 3) A first motor (601) is provided at the top; a first torque sensor (605) and a transmission shaft (611) are provided inside the module support (603); the output end of the first motor (601) is connected to the transmission shaft (611) through the first torque sensor (605); a gear (612) is provided at the bottom end of the transmission shaft (611); an arc-shaped rack (616) is provided at the top end of the bottom plate (615); the gear (612) is meshedly connected with the arc-shaped rack (616).

8. The B-axis powered tool holder simulation loading test bench according to claim 7, characterized in that: A first reducer (602) is provided at the top of the module support (603); 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 fixing frame (606); a third coupling (604) and a fourth coupling (607) are respectively provided at two 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 transmission shaft (611).

9. The B-axis powered tool holder simulation loading test bench according to claim 7, characterized in that: A first track support platform (614) and a second track support platform (609) are provided at the top of the base plate (615); 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).

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