CN112629902A - Simulated cutting loading device of turning and rolling combined machine tool and using method - Google Patents
Simulated cutting loading device of turning and rolling combined machine tool and using method Download PDFInfo
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- CN112629902A CN112629902A CN202011511737.1A CN202011511737A CN112629902A CN 112629902 A CN112629902 A CN 112629902A CN 202011511737 A CN202011511737 A CN 202011511737A CN 112629902 A CN112629902 A CN 112629902A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a simulated cutting loading device of a turning and rolling combined machine tool and a using method thereof. The using method comprises the following steps: fixing the simulated cutting loading device on a machine tool workbench, and installing and clamping a test rod at a machine tool; the cutting force simulation loading assembly is used for generating an exciting force applied by testing, simulating the load characteristic of the machine tool in a machining state, and further testing the dynamic characteristic performance of the machine tool under the exciting load.
Description
Technical Field
The invention belongs to the technical field of machine tool performance testing, and particularly relates to a simulated cutting loading device of a turning and rolling combined machine tool and a using method thereof.
Background
At present, for numerical control machine tools, various cutting processes can be realized on the same machine tool, the production efficiency is improved, and the numerical control machine tool becomes indispensable processing equipment in various industries. Due to differences among machine tool manufacturing companies, machine tool products manufactured by the machine tool manufacturing companies often have differences in performance, and even the same batch of machine tools manufactured by the same machine tool manufacturing company can have differences. For users, it is desirable to purchase a machine tool product with good performance at a lower price, but the price of the machine tool is often related to the performance of the machine tool, and the better the performance of the machine tool is, the more expensive the price of the machine tool is, wherein the main reason is that the high cost is usually required for testing the performance of the machine tool.
Before the machine tool leaves a factory, testing the performance of the machine tool is an indispensable link, faults possibly occurring in the actual working process of the machine tool can be continuously found through testing the performance of the machine tool, the design of the machine tool can be continuously improved according to a test result until the limit performance of the machine tool is tested, and the machine tool is designed and shaped under the limit performance.
At present, machine tool performance tests are mainly carried out in two main modes: the first is realized by actually processing material objects by a machine tool, and the second is realized by simulating the processing process of the machine tool by a computer; although the first method can accurately realize the running condition of the machine tool during actual machining, a large amount of material objects and machining tools are consumed, and the test result is expensive; although the second method has low test cost, the reliability of the test result is low because the simulation test is performed only by the computer, and even if the performance test is simulated in the computer, the machine tool still cannot effectively avoid the occurrence of faults in the actual machining process.
Therefore, a brand-new machine tool performance testing means is urgently needed to be found, the stress condition of the machine tool in the actual machining process can be truly simulated, material objects and machining tools do not need to be consumed, the machine tool performance testing cost is effectively reduced, and the effects of ensuring the excellent performance of the machine tool and reducing the manufacturing cost of the machine tool are achieved.
The patent name of a main shaft radial loading device (application number: 201922092048) discloses a main shaft radial loading device, which comprises a main shaft detection rod and a radial force loading module; the radial force loading module comprises 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 be on test platform, and the condition of simulation lathe actual machining operating mode is in order to carry out the sports car experiment, but this patent can only produce the loading force of the radial one direction of main shaft, can not simulate the lathe actual processing totally and receive complicated loading force, and the suitability is not high.
The patent name is a loading experimental device (application number: 201720764482.7) for simulating the cutting force of a cutter, and discloses a loading experimental device for simulating the cutting force and the acting position of the cutter, which comprises a loading device capable of applying three-way force simultaneously, wherein a detection device for measuring the magnitude of the simulated loading three-way acting force is arranged on the loading device, and the loading device can realize the simulated loading of each position in space through the customization of accessories, but the patent can only generate static loading force and cannot simulate the machining condition of a machine tool under dynamic loading force.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the simulated cutting loading device of the turning and rolling combined machine tool and the using method thereof, which can truly simulate the stress condition of the machine tool in the actual machining process, do not need to consume material objects and machining tools, effectively reduce the cost of machine tool performance test, and reduce the manufacturing cost of the machine tool while ensuring the excellent performance of the machine tool.
The invention is realized by at least one of the following technical schemes.
The utility model provides a car rolls compound lathe simulation cutting loading device, includes cross slip table, base, rigid support, work piece motion simulation subassembly, loading power amplification subassembly, cutting power simulation loading subassembly and test rod, the pedestal mounting in on the cross slip table, rigid support install in on the base, work piece motion simulation subassembly install in the rigid support middle part, cutting power simulation loading unit mount is in the rigid support upper end, loading power amplification unit mount in inside the rigid support, loading power amplification subassembly upper end with cutting power simulation loading subassembly is connected, loading power amplification subassembly middle part with work piece motion simulation subassembly is connected.
Preferably, the workpiece motion simulation assembly comprises a test rod mounting shell, a linear sliding table, a linear guide rail, a push rod and a gradient generation part; the test rod is sleeved in the test rod mounting shell, and the test rod mounting shells are separated in half; the test rod installation shell with the push rod is articulated, test rod installation shell with the push rod rotates at the pin joint, the push rod with the slope produces the part and connects, the slope produces the part and installs on the linear sliding table, linear sliding table inlays in on the linear guide rail, the linear guide rail sets up in the rigid support.
Preferably, the cutting force simulation loading assembly comprises a vibration exciter, a first connecting part and a vibration exciter mounting base, the vibration exciter is connected with the first connecting part, the vibration exciter mounting base is connected with the rigid support, and a vibration isolation pad is arranged between the vibration exciter mounting base and the rigid support; the vibration exciter is arranged on the vibration exciter mounting base.
Preferably, the linear sliding table is sleeved on the linear guide rail, a rail seat is additionally arranged between the linear sliding table and the linear guide rail, and the rail seat is provided with a guide roller; the linear sliding table is in sliding fit with the linear guide rail through a guide roller; the linear guide rail is connected with the rigid support;
the test rod both ends are the round shaft, and the interlude is the spline.
Preferably, the loading force amplifying assembly comprises a lever and a second connecting part, the lever is connected with the push rod, and the lower end of the lever is connected with a hinge arranged on the rigid support.
Preferably, the surface of the base is provided with an arc-shaped dovetail groove, the rigid support is subjected to angle adjustment along the arc-shaped dovetail groove according to experimental requirements, so that the included angle alpha between the exciting force generated by the vibration exciter and the horizontal plane of the axial lead of the test rod is within +/-90 degrees, radial cutting component force and tangential cutting component force generated by cutting in the machining process of the simulation machine tool are generated, and the ratio of the radial cutting component force to the tangential cutting component force depends on the horizontal included angle alpha between the exciting force and the axial lead of the test rod.
Preferably, the gradient generating part enables the exciting force generated by the vibration exciter and the axial line of the test rod to form an included angle beta on a vertical plane, the cutting force vertical to the horizontal plane generated by cutting in the machining process of the simulation machine tool is generated, and the included angle beta formed by the exciting force and the axial line of the test rod is +/-90 degrees.
Preferably, the test rod mounting shell is provided with a locking bolt, and the test rod mounting shell are fixed in the z direction through the locking bolt, so that the test rod mounting shell transmits the acting force generated by the vibration exciter in the vertical direction to the test rod;
the vibration exciter simulates periodic hobbing cutting force generated by a multi-tooth hob during hobbing, simulates intermittent turning force generated by a single-blade lathe tool during turning for processing discontinuous surfaces, and simulates periodic milling force generated by a multi-blade milling cutter during milling for cutting workpieces.
Preferably, the cutting force simulation loading assembly has a lever characteristic, the length of a lever fulcrum and a force arm is adjustable, the simulation loading force is amplified through the adjustment of the lever fulcrum and the length of the force arm of the loading force amplification assembly, and the amplification factor of the loading force is 1 when the position of a loading point of the exciting force is adjusted to be consistent with the position of the lever fulcrum.
Preferably, the vibration exciter can generate a vibration frequency of less than or equal to 2000Hz and an exciting force of less than or equal to 700N.
Preferably, the vibration exciter can generate exciting force in a certain range, the vibration frequency range is 0-25KHz, and the exciting force range is 0-900N.
Preferably, the 120Hz vibration frequency generated by the vibration exciter can simulate the working frequency of the hobbing cutter during hobbing; the 500N exciting force generated by the vibration exciter can simulate the cutting force of the hobbing cutter during hobbing.
Preferably, the length ratio of the power arm to the resistance arm of the lever is 1.5: 1, the cutting force loading assembly can amplify the simulation loading force by 1.5 times through the loading force amplifying assembly.
The use method of the simulated cutting loading device of the turning and rolling combined machine tool comprises the following steps:
firstly, selecting a machine tool which needs to be subjected to performance testing, and determining a cutting force F, a vertical cutting component force Fz, a radial cutting component force Fx and a tangential cutting component force Ft which need to be simulated before testing; the size of the cutting force F is adjusted by setting vibration exciter parameters, the calculation formula of the vertical cutting force component is Fz ═ F · cos beta, the calculation formula of the radial cutting force component is Fx ═ F · sin beta, and the calculation formula of the tangential cutting force component is Ft ═ F · sin β cos alpha;
step two, mounting the simulated cutting loading device on a workbench of a machine tool, and adjusting the positions of the cross sliding table and the test rod, the horizontal included angle alpha between the exciting force and the axial lead of the test rod and the included angle beta between the exciting force and the axial lead of the test rod so that the test rod is mounted at the workpiece clamping position of the machine tool and clamped;
step three, setting the exciting force F required by the simulated cutting test determined in the step one in the vibration exciter;
generating a testing set exciting force by using the cutting force simulation loading assembly, starting the machine tool and simulating the actual running state of the machine tool under a stress condition, and further testing the machine tool performance under the current exciting force condition;
and step five, resetting the exciting force, and repeating the step three to finish the machine tool performance test under different exciting force conditions.
Compared with the prior art, the invention has the beneficial effects that:
1. the test can be carried out without consuming the workpiece, and the test cost is low;
2. the specifications of the test rod 5 and the test rod mounting shell 1 can be changed according to the actual size of the test machine tool, and the applicability is high;
3. the invention can realize various test modes including specified exciting force test and frequency sweep test, can simulate the stress condition in the actual processing of common machine tools in the market, such as lathes, gear hobbing machines, milling machines and the like, and has strong function.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a perspective view of a simulated cutting loading device of a turning and rolling combined machine tool according to an embodiment of the invention;
FIG. 2 is an assembly view of a workpiece motion simulation assembly according to an embodiment of the present invention;
FIG. 3 is a schematic view of a test stick according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a linear slide table and a linear slide rail according to an embodiment of the present invention;
FIG. 5 is an assembly view of a loading force amplifying assembly according to an embodiment of the present invention;
FIG. 6 is an assembly view of a cutting force simulation loading assembly in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view of the connection among the rigid support, the workpiece motion simulation assembly, the loading force amplification assembly and the cutting force simulation loading assembly according to the embodiment of the present invention;
FIG. 8 is a schematic view of a base structure according to an embodiment of the present invention;
in the figure, 30-workpiece motion simulation module, 40-loading force amplification module, 50-cutting force simulation loading module, 1-test rod installation shell, 2-bolt, 3-locking bolt, 4-linear sliding table, 5-test rod, 6-push rod, 7-gradient generation component, 8-lever, 9-first connecting component, 10-vibration exciter, 11-vibration exciter installation base, 12-vibration isolation pad, 13-rigid support, 14-base, 15-cross sliding table, 16-second connecting component, 17-movable bottom plate, 18-hinge pin, 19-linear guide rail, 20-rail seat, 21-guide roller.
Detailed Description
In order to facilitate an understanding of the invention, the invention is described in further detail below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, a simulated cutting loading device of a turning and rolling compound machine tool comprises: the device comprises a cross sliding table 15, a base 14, a rigid support 13, a workpiece motion simulation assembly 30, a loading force amplification assembly 40, a cutting force simulation loading assembly 50 and a test rod 5.
The rigid support 13 is shown supporting 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, the base 14 fastens the whole device on the cross sliding table 15 through a universal clamping bolt, a hand wheel is arranged on the cross sliding table 15, and the position of the cross sliding table 15 is adjusted through the hand wheel; the rigid support 13 is mounted on the base 14;
as shown in fig. 2, the workpiece motion simulation module 30 includes a test stick mounting housing 1, a linear slide 4, a linear guide rail 19, a push rod 6, and a gradient generation section 7. The test rod mounting shell 1 can be separated in half, the two parts of the test rod mounting shell 1 are connected by using the bolts 2, the test rod mounting shell 1 is connected with the push rod 6 through the hinge pin 18, and the test rod mounting shell and the push rod can rotate at a hinge point; the test rod 5 is sleeved in the test rod mounting shell 1; the push rod 6 is connected with a gradient generating component 7; the gradient generating part 7 is installed on the linear sliding table 4 and connected with the linear sliding table 4 through bolts. The linear sliding table 4 is embedded on the linear sliding rail 19; the linear slide 19 is arranged in the rigid support 13.
As shown in fig. 2, a plane on which the push rod 6 is mounted on the gradient generating component 7 forms a certain angle with a horizontal plane, and the specific angle can be changed according to actual needs, wherein the gradient generating component 7 has different specifications.
The test rod mounting shell 2 is provided with a locking bolt 3, and the test rod mounting shell are fixed in the z direction through the locking bolt, so that the test rod mounting shell transmits acting force generated by the vibration exciter in the vertical direction to the test rod;
as shown in fig. 3, the upper and lower ends of the test rod 5 are in the shape of a circular shaft, and the middle section is in the shape of a spline and is matched with the spline on the inner side of the test rod mounting housing 1;
the push rod 6 is provided with a threaded hole and is connected with the gradient generating component 7 through a bolt.
As shown in fig. 4, the linear sliding table 4 is of a concave structure, and the linear sliding table 4 is sleeved on the linear sliding rail 19. The linear guide rail is characterized in that rail bases 20 are additionally arranged at two ends of the linear guide rail 19, grooves are formed in the outer side surfaces of the rail bases 20, guide rollers 21 are arranged in the grooves, and the linear sliding table 4 is in sliding fit with the linear guide rail 19 through the guide rollers 21.
And the linear sliding rail 19 is provided with a threaded hole and is connected with the rigid support 13 through a bolt.
The movable bottom plate 17 is installed inside the rigid support 13, and threaded holes are formed around the movable bottom plate 17 and can be in threaded connection with the rigid support 13. The workpiece motion simulation assembly 30 is adjustable in position in the z-direction of the rigid support 13 by means of the movable base 17.
As shown in fig. 6, the cutting force simulation loading assembly 30 includes a first connection member 9, an exciter 10, an exciter mounting base 11, and an isolator pad 12. The vibration exciter 10 is mounted on the vibration exciter mounting base 11; the middle of one end of the first connecting component 9 is hollowed, the lever 8 can be installed with the first connecting component 9 through the hollowed part, a threaded hole is formed in the other end of the first connecting component 9, and the first connecting component 9 is connected with the vibration exciter 10 through threads; the vibration exciter mounting base 11 is provided with a threaded hole and is connected with the rigid support 13 through a bolt; the vibration isolation pad 12 is arranged between the vibration exciter mounting base 11 and the rigid support 13, and can isolate the influence of vibration generated by the machine tool on the vibration exciter in the movement process of the machine tool.
In one embodiment, the vibration exciter 10 is of a model SA-JZ070, can generate vibration frequency less than or equal to 2000Hz and excitation force less than or equal to 700N, can generate maximum amplitude of +/-12.5 mm, adopts an output mode of a push rod, can generate vibration frequency of 120Hz, can simulate the working frequency of a hobbing cutter during hobbing, enables the simulated machining process of the whole device to be more consistent with the actual condition, and enables the test result to be more accurate.
As shown in fig. 5 and 7, the loading force amplifying assembly 40 includes a lever 8 and a second connecting part 16, the lever 8 is connected with the push rod 6 by a hinge pin, one side of the second connecting part 16 is provided with a round hole, the other side of the second connecting part 16 is T-shaped, the second connecting part 16 is mounted at the bottom of the rigid bracket 13 by the other side of the T-shaped structure, the lever 8 is connected with the round hole at one side of the second connecting part 16 by the hinge pin, and the lever 8 can rotate on the second connecting part 16.
The upper end of a lever 8 in the loading force amplifying assembly 40 is connected with an exciter 10 in the cutting force simulation loading assembly 50, the middle part of the lever is connected with a push rod 6 in the workpiece motion simulation assembly 30, and the cutting force simulation loading assembly 50 amplifies the generated exciting force through the cutting force amplifying assembly 40 and transmits the amplified exciting force to the workpiece motion simulation assembly 30.
In this embodiment, the length ratio of the power arm to the resistance arm of the lever 8 is 1.5: 1, the exciting force generated by the cutting force simulation loading assembly 50 can be amplified by 1.5 times.
As shown in fig. 8, an arc-shaped trapezoidal groove is formed on the surface of the base 14, and the rigid support 13 can drive the loading force amplifying assembly 40, the cutting force simulation loading assembly 50, the linear sliding table 4, the push rod 6, the gradient generating component 7, the movable bottom plate 17, and the linear guide rail 19 to rotate on the base 14.
The position of the x and y coordinate directions of the cross sliding table 15 is adjusted through a hand wheel, the cross sliding table can be locked after adjustment is finished, and practical use can be facilitated through adjustment of the x and y coordinate directions of the cross sliding table 15.
The use method of the simulated cutting loading device of the turning and rolling combined machine tool comprises the following steps:
firstly, selecting a machine tool which needs to be subjected to performance testing, and determining a cutting force F, a vertical cutting component force Fz, a radial cutting component force Fx and a tangential cutting component force Ft which need to be simulated before testing; the magnitude of the cutting force F is adjusted by setting parameters of the vibration exciter 10, the vertical cutting component force is calculated by the formula Fz ═ F · cos β, the radial cutting component force is calculated by the formula Fx ═ F · sin β, and the tangential cutting component force is calculated by the formula Ft ═ F · sin β cos α.
Mounting the simulated cutting loading device on a workbench of a machine tool, and adjusting the positions of the cross sliding table 15 and the test rod 5, the horizontal included angle alpha between the exciting force and the axial lead of the test rod and the vertical included angle beta between the exciting force and the axial lead of the test rod so that the test rod 5 is mounted at the workpiece clamping position of the machine tool and clamped;
step two, setting the exciting force F required by the simulated cutting test determined in the step one;
thirdly, generating a testing set exciting force by using the cutting force simulation loading assembly 30, starting the machine tool and simulating the actual running state of the machine tool under a stress condition, and further testing the machine tool performance under the current exciting force condition;
and step four, resetting the exciting force, and repeating the step three to finish the machine tool performance test under different exciting force conditions.
The invention provides a brand-new machine tool performance testing means, and after the machine tool simulation cutting loading device with brand-new design is assembled with a machine tool for use, the loading force and the impact force borne by the machine tool in the actual machining process can be truly simulated, the recording force and the impact force in the x direction, the y direction and the z direction can be generated simultaneously, material objects and machining tools are not consumed, the machine tool performance testing cost is effectively reduced, and meanwhile, a performance testing result conforming to the actual situation can be obtained.
The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A simulated cutting loading device of a turning and rolling compound machine tool is characterized by comprising a cross sliding table (15), a base (14), a rigid support (13), a workpiece motion simulation assembly (30), a loading force amplification assembly (40), a cutting force simulation loading assembly (50) and a test rod (5), the base seat (14) is arranged on the cross sliding table (15), the rigid support (13) is arranged on the base seat (14), the workpiece motion simulation component (30) is arranged in the middle of the rigid support (13), the cutting force simulation loading assembly (50) is arranged at the upper end of the rigid support (13), the loading force amplifying assembly (40) is arranged inside the rigid bracket (13), the upper end of the loading force amplifying assembly (40) is connected with the cutting force simulation loading assembly (50), the middle part of the loading force amplifying assembly (40) is connected with the workpiece motion simulation assembly (30).
2. The simulated cutting loading device of the turning and rolling compound machine tool according to claim 1, characterized in that the workpiece motion simulation assembly (30) comprises a test rod mounting shell (1), a linear sliding table (4), a linear guide rail (19), a push rod (6) and a gradient generating part (7); the test rod (5) is sleeved in the test rod mounting shell (1), and the test rod mounting shells (1) are separated in half; test stick installation shell (1) with push rod (6) are articulated, test stick installation shell (1) with push rod (6) rotate at the pin joint, push rod (6) with the slope produces part (7) and connects, the slope produces part (7) and installs on linear slip table (4), linear slip table (4) are set up in on linear guide rail (19), linear guide rail (19) set up in rigid support (13).
3. The machine tool simulated cutting loading device of claim 2, wherein: the cutting force simulation loading assembly (50) comprises a vibration exciter (10), a first connecting part (9) and a vibration exciter mounting base (11), the vibration exciter (10) is connected with the first connecting part (9), the vibration exciter mounting base (11) is connected with the rigid support (13), and a vibration isolation pad (12) is arranged between the vibration exciter mounting base (11) and the rigid support (13); the vibration exciter (10) is installed on the vibration exciter installation base (11).
4. The simulated cutting loading device of the turning and rolling compound machine tool as claimed in claim 3, characterized in that: the linear sliding table (4) is sleeved on the linear guide rail (19), a rail seat is additionally arranged between the linear sliding table (4) and the linear guide rail (19), and the rail seat is provided with a guide roller; the linear sliding table (4) is in sliding fit with the linear guide rail (19) through a guide roller; the linear guide (19) is connected with the rigid support (13);
the two ends of the test rod (5) are round shafts, and the middle section of the test rod is a spline.
5. The simulated cutting loading device of the turning and rolling compound machine tool as claimed in claim 4, characterized in that: the loading force amplifying assembly (20) comprises a lever (8) and a second connecting part (16), the lever (8) is connected with the push rod (6), and the lower end of the lever (8) is connected with a hinge arranged on the rigid support (13).
6. The simulated cutting loading device of the turning and rolling compound machine tool according to claim 5, characterized in that the surface of the base (14) is provided with an arc-shaped trapezoidal groove, the rigid support (13) is angularly adjusted along the arc-shaped trapezoidal groove according to experimental requirements, so that the included angle alpha between the exciting force generated by the vibration exciter (10) and the horizontal plane of the axial lead of the test rod is +/-90 degrees, and the ratio of the radial cutting component force to the tangential cutting component force depends on the horizontal included angle alpha between the exciting force and the axial lead of the test rod due to the radial cutting component force and the tangential cutting component force generated by cutting in the process of the simulated machine tool.
7. The simulated cutting loading device of the turning and rolling compound machine tool as claimed in claim 6, characterized in that: the gradient generating part (7) enables an exciting force generated by the vibration exciter (10) and the axial line of the test rod to form an included angle beta on a vertical plane, the cutting force which is generated by cutting and is perpendicular to a horizontal plane in the machining process of the simulation machine tool is simulated, and the range of the included angle beta formed by the exciting force and the axial line of the test rod is +/-90 degrees.
8. The simulated cutting loading device of the turning and rolling compound machine tool according to claim 7, characterized in that: the testing rod mounting shell (1) is provided with a locking bolt, and the testing rod (5) and the testing rod mounting shell (1) are fixed in the z direction through the locking bolt, so that the testing rod mounting shell (1) transmits acting force generated by the vibration exciter (10) in the vertical direction to the testing rod (5);
the vibration exciter (10) simulates periodic hobbing cutting force generated by a multi-tooth hobbing cutter during hobbing, simulates intermittent turning force generated by a single-blade turning tool during turning for processing discontinuous surfaces, and simulates periodic milling force generated by a multi-blade milling cutter during milling for cutting workpieces.
9. The simulated cutting loading device of the turning and rolling compound machine tool according to claim 8, characterized in that: the cutting force simulation loading assembly (50) has the lever characteristic that the length of a lever fulcrum and a force arm is adjustable, the simulation loading force is amplified through the adjustment of the lever fulcrum and the length of the force arm of the loading force amplification assembly (40), and when the position of a loading point of an exciting force is adjusted to be consistent with the position of the lever fulcrum, the amplification factor of the loading force is 1.
10. The use method of the simulated cutting loading device of the rolling and turning compound machine tool as claimed in claim 9, is characterized by comprising the following steps:
firstly, selecting a machine tool which needs to be subjected to performance testing, and determining a cutting force F, a vertical cutting component force Fz, a radial cutting component force Fx and a tangential cutting component force Ft which need to be simulated before testing; the size of the cutting force F is adjusted by setting vibration exciter parameters, the calculation formula of the vertical cutting force component is Fz ═ F · cos beta, the calculation formula of the radial cutting force component is Fx ═ F · sin beta, and the calculation formula of the tangential cutting force component is Ft ═ F · sin β cos alpha;
step two, mounting the simulated cutting loading device on a workbench of a machine tool, and adjusting the positions of the cross sliding table (14) and the test rod (5), the horizontal included angle alpha between the exciting force and the axial lead of the test rod, and the included angle beta between the exciting force and the axial lead of the test rod, so that the test rod (5) is mounted at the clamping position of a machine tool workpiece and clamped;
step three, setting the exciting force F required by the simulated cutting test determined in the step one in a vibration exciter (10);
generating a testing set exciting force by using the cutting force simulation loading assembly (50), starting the machine tool and simulating the actual running state of the machine tool under a stress condition, and further testing the machine tool performance under the current exciting force condition;
and step five, resetting the exciting force, and repeating the step three to finish the machine tool performance test under different exciting force conditions.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615730A (en) * | 2022-10-08 | 2023-01-17 | 巨冈精工(广东)股份有限公司 | Oscillating turntable type five-axis machine tool simulated cutting force loading device |
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2020
- 2020-12-18 CN CN202011511737.1A patent/CN112629902A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615730A (en) * | 2022-10-08 | 2023-01-17 | 巨冈精工(广东)股份有限公司 | Oscillating turntable type five-axis machine tool simulated cutting force loading device |
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