A simulation cutting loading device and usage method for a turning-rolling composite machine tool

Abstract

The present invention discloses a simulation cutting loading device and a usage method for a turning-rolling composite machine tool. The device includes a cross slide, a base, a rigid support, a workpiece motion simulation component, a loading force amplification component, a cutting force simulation loading component, and a test rod. The base is installed on the cross slide, the rigid support is installed on the base, the workpiece motion simulation component is installed in the middle of the rigid support, the cutting force simulation loading component is installed at the upper end of the rigid support, and the loading force amplification component is installed inside the rigid support and is connected to the cutting force simulation loading component at the upper end. The steps of the usage method are as follows: Fix the simulation cutting loading device to the machine tool workbench, install the test rod at the machine tool tooling and clamp it; Use the cutting force simulation loading component to generate the excitation force applied to the test, simulate the load characteristics of the machine tool in the processing state, and then test the dynamic characteristic performance of the machine tool under the excitation load.

Description

Technical Field

[0001] The present invention belongs to the technical field of machine tool performance testing, and particularly relates to a simulation cutting loading device for a turning-rolling compound machine tool and a using method thereof. Background Art

[0002] Currently, for numerically controlled machine tools, multiple cutting processes can be achieved on the same machine tool, improving production efficiency and becoming an indispensable processing device in many industries. Due to differences among machine tool manufacturing enterprises, the performance of the manufactured machine tool products often varies. Even for the same batch of machine tools manufactured by the same machine tool manufacturing enterprise, there are also differences. For users, they hope to purchase machine tool products with excellent performance at a relatively low price. However, the price of a machine tool is often related to its performance. The more excellent the performance of the machine tool, the more expensive the price. The main reason is usually that testing the performance of the machine tool requires high costs.

[0003] Before the machine tool leaves the factory, testing the performance of the machine tool is an indispensable link. By testing the performance of the machine tool, faults that may occur during the actual working process of the machine tool can be continuously discovered. According to the test results, the design of the machine tool can be continuously improved until the ultimate performance of the machine tool is tested and the machine tool design is finalized under the ultimate performance.

[0004] Currently, there are mainly two mainstream methods for machine tool performance testing: The first is achieved by the machine tool actually processing material objects, and the second is achieved by computer-simulating the machine tool processing process. Although the first method can accurately reflect the operating conditions of the machine tool during actual processing, it requires consuming a large amount of material objects and cutting tools, and the test results are expensive. Although the second method has a very low test cost, since it only relies on computer simulation testing, the reliability of the test results is very low. Even if the performance test is completed in the computer, faults still cannot be effectively avoided during the actual processing of the machine tool.

[0005] Therefore, there is an urgent need to find a brand-new machine tool performance testing method that can truly simulate the stress conditions during the actual processing of the machine tool, without consuming material objects and cutting tools, effectively reducing the machine tool performance testing cost, and achieving the effect of ensuring excellent machine tool performance while reducing the machine tool manufacturing cost.

[0006] The patent titled "A Spindle Radial Loading Device" (Application No.: 201922092048) discloses a spindle radial loading device, which includes a spindle inspection bar and a radial force loading module; the radial force loading module includes a driving device, a mounting seat, and a contact head device. The driving device is fixed on the mounting seat, and the contact head device is installed on the driving device. This patent can simulate the actual machining conditions of a machine tool on a test platform to conduct a running-in experiment. However, this patent can only generate a loading force in one direction of the spindle radial direction and cannot fully simulate the complex loading forces experienced during actual machining of a machine tool, resulting in low applicability.

[0007] The patent titled "A Loading Experiment Device for Simulating Tool Cutting Force" (Application No.: 201720764482.7) discloses a loading experiment device for simulating tool cutting force and acting position. The device includes a loading device capable of applying three-directional forces simultaneously. A detection device for measuring the magnitudes of the three-directional forces of the simulated loading is installed on the loading device. The loading device can achieve simulated loading at various positions in space through customization of accessories. However, this patent can only generate static loading forces and cannot simulate the machining conditions of a machine tool under dynamic loading forces. Summary of the Invention

[0008] Aiming at the problems existing in the prior art, the present invention provides a turning-rolling compound machine tool simulation cutting loading device and a using method, which can truly simulate the force conditions during the actual machining process of a machine tool, and do not require the consumption of material objects and cutting tools, effectively reducing the cost of machine tool performance testing, and can reduce the manufacturing cost of the machine tool while ensuring excellent performance of the machine tool.

[0009] The present invention is achieved by at least one of the following technical solutions.

[0010] A turning-rolling compound machine tool simulation cutting loading device includes a cross slide, a base, a rigid support, a workpiece motion simulation component, a loading force amplification component, a cutting force simulation loading component, and a test bar. The base is installed on the cross slide, the rigid support is installed on the base, the workpiece motion simulation component is installed in the middle of the rigid support, the cutting force simulation loading component is installed at the upper end of the rigid support, the loading force amplification component is installed inside the rigid support, the upper end of the loading force amplification component is connected to the cutting force simulation loading component, and the middle of the loading force amplification component is connected to the workpiece motion simulation component.

[0011] Preferably, the workpiece motion simulation component includes a test bar mounting housing, a linear slide, a linear guide rail, a push rod, and a slope generating component; the test bar is sleeved in the test bar mounting housing, and the test bar mounting housing is split in half; the test bar mounting housing is hinged to the push rod, and the test bar mounting housing rotates at the hinge point with the push rod. The push rod is connected to the slope generating component, the slope generating component is mounted on the linear slide, the linear slide is embedded on the linear guide rail, and the linear guide rail is arranged in the rigid support.

[0012] Preferably, the cutting force simulation loading component includes a vibrator, a first connecting component, and a vibrator mounting base. The vibrator is connected to the first connecting component, the vibrator mounting base is connected to the rigid support, and a vibration isolation pad is provided between the vibrator mounting base and the rigid support; the vibrator is mounted on the vibrator mounting base.

[0013] Preferably, the linear slide is sleeved on the linear guide rail, and a track seat is installed between the linear slide and the linear guide rail. The track seat is provided with guide rollers; the linear slide and the linear guide rail are in sliding fit through the guide rollers; the linear guide rail is connected to the rigid support;

[0014] Both ends of the test bar are round shafts, and the middle section is a spline.

[0015] Preferably, the loading force amplification component includes a lever and a second connecting component. The lever is connected to the push rod, and the lower end of the lever is connected to a hinge provided on the rigid support.

[0016] Preferably, the surface of the base is provided with an arc trapezoidal groove, and the rigid support is adjusted at an angle along the arc trapezoidal groove according to the experimental requirements, so that the excitation force generated by the vibrator forms an angle α with the horizontal plane of the axis line of the test bar in the range of ±90 degrees, simulating the radial and tangential cutting component forces generated by cutting during the machine tool processing. The ratio of the radial and tangential cutting component forces depends on the horizontal angle α between the excitation force and the axis line of the test bar.

[0017] Preferably, the slope generating component makes the excitation force generated by the vibrator form an angle β with the axis line of the test bar in the vertical plane, simulating the cutting force perpendicular to the horizontal plane generated by cutting during the machine tool processing. The angle β formed by the excitation force and the axis line of the test bar is in the range of ±90 degrees.

[0018] Preferably, the test bar mounting housing is provided with a locking bolt, and the test bar and the test bar mounting housing are fixed in the z direction through the locking bolt, so that the test bar mounting housing transmits the vertical acting force generated by the vibrator to the test bar;

[0019] The vibrator simulates the periodic hobbing cutting force generated by a multi-tooth hob during hobbing, the interrupted turning force generated by a single-edge turning tool during turning of a discontinuous surface, and the periodic milling force generated by a multi-edge milling cutter during milling of a workpiece.

[0020] Preferably, the cutting force simulation loading component has a lever feature, and the lever fulcrum and the length of the force arm are adjustable. By adjusting the lever fulcrum and the length of the force arm of the loading force amplification component, the simulation loading force is amplified. When the loading point position of the exciting force is adjusted to be the same as the lever fulcrum position, the loading force amplification factor is 1.

[0021] Preferably, the vibrator can generate a vibration frequency less than or equal to 2000 Hz and an exciting force less than or equal to 700 N.

[0022] Preferably, the vibrator can generate a certain range of exciting forces, with a vibration frequency range of 0 - 25 KHz and an exciting force range of 0 - 900 N.

[0023] Preferably, the 120 Hz vibration frequency generated by the vibrator can simulate the working frequency of the hob during hobbing; the 500 N exciting force generated by the vibrator can simulate the cutting force of the hob during hobbing.

[0024] Preferably, the ratio of the length of the power arm to the length of the resistance arm of the lever is 1.5:1, and the cutting force loading component can amplify the simulation loading force by 1.5 times through the loading force amplification component.

[0025] The usage method of the simulation cutting loading device for a turning-hobbing composite machine tool includes the following steps:

[0026] Step 1: Select a machine tool that needs to be tested for performance. Before the test, first determine the cutting force F, vertical cutting component force Fz, radial cutting component force Fx, and tangential cutting component force Ft required for the simulation; the magnitude of the cutting force F is adjusted by setting the parameters of the vibrator. The calculation formula for the vertical cutting component force is Fz = F·cosβ, the calculation formula for the radial cutting component force is Fx = F·sinβ, and the calculation formula for the tangential cutting component force is Ft = F·sinβcosα;

[0027] Step 2: Install the simulation cutting loading device on the workbench of the machine tool, adjust the positions of the cross slide and the test rod, and the horizontal angle α between the exciting force and the axis of the test rod and the angle β formed by the exciting force and the axis of the test rod, so that the test rod is installed at the workpiece clamping position of the machine tool and clamped;

[0028] Step 3: Set the exciting force F required for the simulation cutting test determined in Step 1 on the vibrator;

[0029] Step 4: Use the cutting force simulation loading component to generate the excitation force set in the test, start the machine tool, and simulate the actual operating state of the machine tool under the force condition, so as to test the performance of the machine tool under the current excitation force condition;

[0030] Step 5: Reset the excitation force, repeat Step 3, and complete the performance test of the machine tool under different excitation force conditions.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. The test can be carried out without consuming workpieces, and the test cost is low;

[0033] 2. The specifications of the test rod 5 and the test rod mounting housing 1 can be replaced according to the actual size of the test machine tool, and the applicability is high;

[0034] 3. The present invention can realize a variety of test methods, including specified excitation force test and sweep frequency test, and can simulate the force conditions in the actual processing of common machine tools such as lathes, hobbing machines, and milling machines on the market, and has powerful functions. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 It is a three-dimensional view of a turning and hobbing composite machine tool simulation cutting loading device according to an embodiment of the present invention;

[0037] Figure 2 It is an assembly drawing of a workpiece motion simulation component according to an embodiment of the present invention;

[0038] Figure 3 It is a schematic structural diagram of a test rod according to an embodiment of the present invention;

[0039] Figure 4 It is a schematic structural diagram of a linear slide and a linear guide according to an embodiment of the present invention;

[0040] Figure 5 It is an assembly drawing of a loading force amplification component according to an embodiment of the present invention;

[0041] Figure 6 It is an assembly drawing of a cutting force simulation loading component according to an embodiment of the present invention;

[0042] Figure 7Schematic diagram of the connection relationship among the rigid support, workpiece motion simulation component, loading force amplification component, and cutting force simulation loading component according to an embodiment of the present invention;

[0043] Figure 8 Schematic diagram of the base structure according to an embodiment of the present invention;

[0044] In the figure, 30 - workpiece motion simulation component, 40 - loading force amplification component, 50 - cutting force simulation loading component, 1 - test bar installation housing, 2 - bolt, 3 - locking bolt, 4 - linear slide, 5 - test bar, 6 - push rod, 7 - slope generating component, 8 - lever, 9 - first connecting component, 10 - exciter, 11 - exciter installation base, 12 - vibration isolation pad, 13 - rigid support, 14 - base, 15 - cross slide, 16 - second connecting component, 17 - movable base plate, 18 - hinge pin, 19 - linear guide rail, 20 - track base, 21 - guide roller. Detailed implementation manners

[0045] To facilitate the understanding of the present invention, the following further detailed description of the present invention is given in conjunction with the accompanying drawings and specific embodiments. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0048] As Figure 1 shown, a turning-rolling composite machine tool simulation cutting loading device includes: a cross slide 15, a base 14, a rigid support 13, a workpiece motion simulation component 30, a loading force amplification component 40, a cutting force simulation loading component 50, and a test bar 5.

[0049] The rigid support 13 shown supports the workpiece motion simulation assembly 30, the loading force amplification assembly 40, and the cutting force simulation loading assembly 50. The rigid support 13 is placed on the base 14, and the base 14 fastens the entire device to the cross slide 15 through a common clamping bolt. A handwheel is provided on the cross slide 15 to adjust the position of the cross slide 15; the rigid support 13 is installed on the base 14;

[0050] As Figure 2 shown, the workpiece motion simulation assembly 30 includes a test bar mounting housing 1, a linear slide 4, a linear guide rail 19, a push rod 6, and a slope generating component 7. The test bar mounting housing 1 can be separated into two halves, and the two parts of the test bar mounting housing 1 are connected by bolts 2. The test bar mounting housing 1 and the push rod 6 are connected by a hinge pin 18, and the two can rotate at the hinge point; the test bar 5 is sleeved inside the test bar mounting housing 1; the push rod 6 is connected to the slope generating component 7; the slope generating component 7 is installed on the linear slide 4 and is connected to the linear slide 4 by bolts. The linear slide 4 is embedded on the linear guide rail 19; the linear guide rail 19 is arranged in the rigid support 13.

[0051] As Figure 2 shown, the plane on the slope generating component 7 where the push rod 6 is installed forms a certain angle with the horizontal plane, and the specific angle can be changed by replacing the slope generating components 7 of different specifications according to actual needs.

[0052] The test bar mounting housing 1 is provided with a locking bolt 3, and the test bar and the test bar mounting housing are fixed in the z direction through the locking bolt, so that the test bar mounting housing transmits the vertical force generated by the exciter to the test bar;

[0053] As Figure 3 shown, the upper and lower ends of the test bar 5 are in the shape of a round shaft, and the middle section is in the shape of a spline, which is matched with the spline inside the test bar mounting housing 1;

[0054] The push rod 6 is provided with a threaded hole and is connected to the slope generating component 7 by bolts.

[0055] As Figure 4 shown, the linear slide 4 adopts a concave structure, and the linear slide 4 is sleeved on the linear guide rail 19. Both ends of the linear guide rail 19 are equipped with track seats 20, and the outer surface of the track seat 20 is provided with a groove, and a guide roller 21 is arranged in the groove. The linear slide 4 and the linear guide rail 19 are in sliding fit through the guide roller 21.

[0056] The linear guide rail 19 is provided with a threaded hole and is connected to the rigid support 13 by bolts.

[0057] It should be noted that the movable bottom plate 17 is installed inside the rigid support 13. Threaded holes are provided around the movable bottom plate 17, and it can be threadedly connected to the rigid support 13. The workpiece motion simulation component 30 can adjust its position in the z direction of the rigid support 13 through the movable bottom plate 17.

[0058] As Figure 6 shown, the cutting force simulation loading component 50 includes a first connecting member 9, a vibrator 10, a vibrator mounting base 11 and a vibration isolation pad 12. The vibrator 10 is installed on the vibrator mounting base 11; one end of the first connecting member 9 is hollowed out in the middle, and the lever 8 can be installed with the first connecting member 9 through the hollowed-out part. Threaded holes are provided at the other end of the first connecting member 9, and the first connecting member 9 and the vibrator 10 are threadedly connected; Threaded holes are provided on the vibrator mounting base 11 and are bolted to the rigid support 13; The vibration isolation pad 12 is placed between the vibrator mounting base 11 and the rigid support 13, and can isolate the influence of the vibration generated by the machine tool itself during the movement of the machine tool on the vibrator.

[0059] In one embodiment, the model of the vibrator 10 is SA-JZ070, which can generate a vibration frequency less than or equal to 2000 Hz and an exciting force less than or equal to 700 N. The maximum amplitude that can be generated is ±12.5 mm, and the output mode is a push rod. This model of vibrator can generate a vibration frequency of 120 Hz, which can simulate the working frequency of the hobbing cutter during hobbing processing, making the simulated processing process of the entire device more in line with the actual situation and the test results more accurate.

[0060] As Figure 5 、 Figure 7 shown, the loading force amplification component 40 includes a lever 8 and a second connecting member 16. The lever 8 and the push rod 6 are connected by a hinge pin. One side of the second connecting member 16 is provided with a round hole, and the other side structure is T-shaped. The second connecting member 16 is installed at the bottom of the rigid support 13 through the T-shaped structure on the other side. The lever 8 is connected to the round hole on one side of the second connecting member 16 through a hinge pin, and the lever 8 can rotate on the second connecting member 16.

[0061] The upper end of the lever 8 in the loading force amplification component 40 is connected to the vibrator 10 in the cutting force simulation loading component 50, and the middle part is connected to the push rod 6 in the workpiece motion simulation component 30. The cutting force simulation loading component 50 amplifies the generated exciting force through the loading force amplification component 40 and transmits it to the workpiece motion simulation component 30.

[0062] In this embodiment, the ratio of the length of the power arm to the resistance arm of the lever 8 is 1.5:1, and the exciting force generated by the cutting force simulation loading component 50 can be amplified by 1.5 times.

[0063] AsFigure 8 As shown, an arc trapezoidal groove is provided on the surface of the base 14, and the rigid support 13 can drive the loading force amplification assembly 40, the cutting force simulation loading assembly 50, the linear slide 4, the push rod 6, the slope generating component 7, the movable base plate 17, and the linear guide rail 19 to rotate on the base 14.

[0064] The positions of the x and y coordinate directions of the cross slide 15 are adjusted by hand wheels. After the adjustment is completed, it can be locked. The adjustment of the x and y coordinate directions of the cross slide 15 facilitates actual use.

[0065] A method for using the simulation cutting loading device of a turning-rolling composite machine tool includes the following steps:

[0066] Step 1: Select a machine tool that needs to be performance-tested. Before the test, first determine the cutting force F, the vertical cutting component force Fz, the radial cutting component force Fx, and the tangential cutting component force Ft required for the simulation; the magnitude of the cutting force F is adjusted by setting the parameters of the vibrator 10. The vertical cutting component force is calculated by the formula Fz = F·cosβ, the radial cutting component force is calculated by the formula Fx = F·sinβ, and the tangential cutting component force is calculated by the formula Ft = F·sinβcosα.

[0067] Step 2: Install the simulation cutting loading device on the workbench of the machine tool, adjust the positions of the cross slide 15 and the test rod 5, and the horizontal angle α between the exciting force and the axis line of the test rod and the vertical angle β formed by the exciting force and the axis line of the test rod, so that the test rod 5 is installed at the workpiece clamping position of the machine tool and clamped;

[0068] Step 2: Set the exciting force F required for the simulation cutting test determined in Step 1;

[0069] Step 3: Use the cutting force simulation loading assembly 50 to generate the exciting force set for the test, start the machine tool and simulate the actual operating state of the machine tool under the force condition, and then test the performance of the machine tool under the current exciting force condition;

[0070] Step 4: Reset the exciting force and repeat Step 3 to complete the performance test of the machine tool under different exciting force conditions.

[0071] The present invention provides a brand-new means for testing the performance of a machine tool. Through the newly designed machine tool simulation cutting loading device, after being assembled and used with the machine tool, it can truly simulate the loading force and impact force received during the actual machining process of the machine tool, and can simultaneously generate the recording force and impact force in the x, y, and z directions. It does not consume material objects and cutting tools, effectively reduces the cost of machine tool performance testing, and at the same time can obtain performance test results that conform to the actual situation.

[0072] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A simulation cutting loading device for a turning-rolling composite machine tool, characterized in that It includes a cross slide (15), a base (14), a rigid support (13), a workpiece motion simulation component (30), a loading force amplification component (40), a cutting force simulation loading component (50) and a test bar (5). The base (14) is installed on the cross slide (15), the rigid support (13) is installed on the base (14), the workpiece motion simulation component (30) is installed in the middle of the rigid support (13), the cutting force simulation loading component (50) is installed at the upper end of the rigid support (13), the loading force amplification component (40) is installed inside the rigid support (13), the upper end of the loading force amplification component (40) is connected to the cutting force simulation loading component (50), and the middle of the loading force amplification component (40) is connected to the workpiece motion simulation component (30); The cutting force simulation loading component (50) has a lever feature, where the lever fulcrum and the length of the force arm are adjustable. By adjusting the lever fulcrum and the length of the force arm of the loading force amplification component (40), the simulated loading force is amplified. When the loading point position of the exciting force is adjusted to be the same as the lever fulcrum position, the loading force amplification factor is 1; when the length ratio of the power arm to the resistance arm is 1.5:1, the loading force generated by the cutting force simulation loading component can be amplified by 1.5 times. The workpiece motion simulation component (30) includes a test rod mounting housing (1), a linear slide (4), a linear guide rail (19), a push rod (6), and a slope generating component (7). The test rod (5) is sleeved inside the test rod mounting housing (1), and the test rod mounting housing (1) is separated into two halves. The test rod mounting housing (1) is hinged to the push rod (6), and the test rod mounting housing (1) rotates at the hinge point with the push rod (6). The push rod (6) is connected to the slope generating component (7), and the slope generating component (7) is mounted on the linear slide (4). The linear slide (4) is embedded on the linear guide rail (19), and the linear guide rail (19) is arranged in the rigid support (13). The cutting force simulation loading component (50) includes an exciter (10), a first connecting component (9), and an exciter mounting base (11). The exciter (10) is connected to the first connecting component (9), and the exciter mounting base (11) is connected to the rigid support (13). A vibration isolation pad (12) is provided between the exciter mounting base (11) and the rigid support (13). The exciter (10) is mounted on the exciter mounting base (11). The linear slide (4) is sleeved on the linear guide rail (19), and a track seat is installed between the linear slide (4) and the linear guide rail (19). The track seat is provided with guide rollers. The linear slide (4) and the linear guide rail (19) are in sliding fit through the guide rollers. The linear guide rail (19) is connected to the rigid support (13). Both ends of the test rod (5) are round shafts, and the middle section is a spline. The loading force amplification component (40) includes a lever (8) and a second connecting component (16). The lever (8) is connected to the push rod (6), and the lower end of the lever (8) is connected to a hinge provided on the rigid support (13).

2. The simulated cutting loading device of a turning-rolling compound machine tool according to claim 1, wherein The surface of the base (14) is provided with an arc-shaped trapezoidal groove. The rigid support (13) is adjusted at an angle along the arc-shaped trapezoidal groove according to experimental requirements, so that the included angle α between the exciting force generated by the exciter (10) and the horizontal plane of the axis of the test rod ranges from ±90 degrees, simulating the radial and tangential cutting component forces generated during machine tool machining due to cutting. The ratio of the radial and tangential cutting component forces depends on the horizontal included angle α between the exciting force and the axis of the test rod.

3. The simulation cutting loading device of a turning-rolling composite machine tool according to claim 1, characterized in that: The slope generating component (7) causes the exciting force generated by the exciter (10) to form an angle β with the axis line of the test bar in the vertical plane, simulating the cutting force perpendicular to the horizontal plane generated by cutting during the machining process of the machine tool. The range of the angle β formed by the exciting force and the axis line of the test bar is ±90 degrees.

4. A simulation cutting loading device for a turning-rolling composite machine tool according to claim 1, characterized in that: The test bar mounting housing (1) is provided with locking bolts. The test bar (5) is fixed to the test bar mounting housing (1) in the z direction through the locking bolts, so that the test bar mounting housing (1) transmits the vertical acting force generated by the exciter (10) to the test bar (5); the exciter (10) simulates the periodic hobbing cutting force generated by a multi-tooth hob during hobbing, the interrupted turning force generated by a single-edge turning tool during turning when machining a discontinuous surface, and the periodic milling force generated by a multi-edge milling cutter during milling when cutting a workpiece.

5. A method for using the simulation cutting loading device of the turning-rolling composite machine tool according to claim 1, characterized in that, It includes the following steps: Step 1: Select a machine tool that needs to be subjected to performance testing. Before the test, first determine the cutting force F, vertical cutting component force Fz, radial cutting component force Fx, and tangential cutting component force Ft required for simulation; the magnitude of the cutting force F is adjusted by setting the parameters of the exciter. The calculation formula for the vertical cutting component force is Fz = F·cosβ, the calculation formula for the radial cutting component force is Fx = F·sinβ, and the calculation formula for the tangential cutting component force is Ft = F·sinβcosα. Step 2: Install the simulated cutting loading device on the workbench of the machine tool, adjust the positions of the cross slide (15) and the test bar (5), and the horizontal angle α between the exciting force and the axis line of the test bar and the angle β formed by the exciting force and the axis line of the test bar, so that the test bar (5) is installed at the workpiece clamping position of the machine tool and clamped. Step 3: Set the exciting force F required for the simulated cutting test determined in Step 1 on the exciter (10). Step 4: Use the cutting force simulation loading component (50) to generate the exciting force set for the test, start the machine tool and simulate the actual operating state of the machine tool under the force condition, and then test the performance of the machine tool under the current exciting force condition. Step 5: Reset the exciting force and repeat Step 3 to complete the performance testing of the machine tool under different exciting force conditions.

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