CN210024662U - Dynamic stiffness measuring device of process system based on common lathe - Google Patents
Dynamic stiffness measuring device of process system based on common lathe Download PDFInfo
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- CN210024662U CN210024662U CN201920866960.4U CN201920866960U CN210024662U CN 210024662 U CN210024662 U CN 210024662U CN 201920866960 U CN201920866960 U CN 201920866960U CN 210024662 U CN210024662 U CN 210024662U
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Abstract
The utility model discloses a dynamic stiffness survey device of process systems based on engine lathe, including setting up the measuring force device who is used for measuring the dorsad force that the cutter received on the lathe saddle, measuring force device is connected with the host computer electricity, and the last still electricity of host computer is connected with the deformation measuring device who is used for detecting the radial deformation of work piece, and the lathe setting is arranged in outward to the deformation measuring device, and the last still electricity of host computer is connected with display and control panel, and display and host computer are connected power supply through the control switch electricity respectively. The utility model discloses can directly survey out the dynamic stiffness of process system, can need not again approximate analog measurement rigidity under quiescent condition, also can no longer need use loaded down with trivial details theory to deduce and calculate, can directly measure the dynamic stiffness of process system through the experimental method under operating condition, the survey process is simple, and convenient popularization and application has very big promotion effect to relevant teaching and scientific research.
Description
Technical Field
The utility model belongs to the technical field of mechanical dynamics, concretely relates to dynamic stiffness survey device of process system based on engine lathe.
Background
In mechanical processing, a complete process system is formed by a machine tool, a clamp, a cutter and a workpiece, and the rigidity of the process system is an important parameter for evaluating the process system and directly influences the processing precision. The rigidity is divided into static rigidity and dynamic rigidity according to whether the process system is in a static state or a working state. The static stiffness is the stiffness of the process system measured by approximately simulating the working state under the static condition of the process system, and compared with the static stiffness, the dynamic stiffness can more accurately reflect the actual stiffness of the process system. The chuck, the tailstock, the workpiece and the tool rest on the common lathe are the most typical process systems, static rigidity measurement is more in the current research for measuring the rigidity of the process system on the common lathe, dynamic rigidity measurement research is relatively less, the only research on the dynamic rigidity measurement is mostly in the modes of theoretical derivation calculation and the like, the process is complex, and the practical application is difficult.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a dynamic stiffness survey device of processing system based on engine lathe to solve the not enough of prior art.
The technical scheme of the utility model is that:
the utility model provides a dynamic stiffness survey device of process systems based on engine lathe, is used for measuring the measuring force device of the dorsad force that the cutter received including setting up on the lathe saddle, measuring force device is connected with the host computer electricity, still be electrically connected with the deformation measuring device who is used for detecting the radial deflection of work piece on the host computer, the setting of lathe is arranged in to the deformation measuring device external, still be electrically connected with display and control panel on the host computer, display and host computer are connected power supply through control switch electricity respectively.
Preferably, the force measuring device comprises a cutting force measuring instrument, and the cutting force measuring instrument is built in the lathe tool rest.
Preferably, the force measuring device comprises a force measuring sensor, and the force measuring sensor is arranged in the lathe tool rest.
Preferably, the deformation amount measuring device is a laser displacement sensor.
Preferably, a signal amplifier for amplifying the back force detection signal is provided in a connection circuit between the deformation amount measuring device and the main body.
Compared with the prior art, the utility model provides a pair of dynamic stiffness survey device based on lathe's process system can utilize this device directly to determine process system dynamic stiffness, can not need again approximate simulation survey rigidity under quiescent condition, also can no longer need use loaded down with trivial details theory to deduce and calculate, can directly measure process system dynamic stiffness through experimental method under operating condition, and the survey process is simple, and convenient popularization and application has very big impetus to relevant teaching and scientific research.
Drawings
Fig. 1 is a schematic view of the overall structure of the testing device of the present invention.
Detailed Description
The utility model provides a dynamic stiffness determination device of process system based on lathe, it is right to combine the schematic structure diagram of figure 1 below the utility model discloses explain.
As shown in fig. 1, a dynamic stiffness measuring device of a general lathe-based process system comprises a force measuring device arranged on a lathe carriage and used for measuring a back force applied to a tool, wherein the force measuring device is electrically connected with a host machine, the host machine is also electrically connected with a deformation measuring device used for detecting a radial deformation of a workpiece, the deformation measuring device is arranged outside the lathe, the host machine is also electrically connected with a display and a control panel, and the display and the host machine are respectively and electrically connected with a power supply through a control switch;
the main machine is used for receiving the measuring signals sent by the force measuring device and the deformation measuring device in real time, calculating the measuring signals in real time, storing the measuring signals and synchronously displaying the measuring signals on the display.
The purpose of arranging the deformation measuring device outside the lathe is to avoid the influence of machine tool vibration and prevent the influence of vibration on measuring precision.
As a further preferred embodiment of the present invention, the force measuring device comprises a cutting force measuring instrument, and the cutting force measuring instrument is built in the lathe saddle.
Specifically, the cutting force measuring instrument is preferably a three-phase cutting force measuring instrument DJ-CL-1 of Chongqing Dijia technology.
As a further preferred embodiment of the present invention, the force measuring device comprises a force measuring sensor, which is built-in on the lathe carriage.
Specifically, the load cell is preferably CT4 of a load cell of dynamic measurement systems limited.
As a further preferred embodiment of the present invention, the main component of the deformation amount measuring device is a laser displacement sensor.
Specifically, the laser displacement sensor is preferably a laser triangular displacement sensor LT10030 by juligh corporation, italy.
As a further preferred embodiment of the present invention, a signal amplifier for amplifying the detection signal of the back force is provided in the connection circuit between the deformation amount measuring device and the main unit.
Specifically, the model of the signal amplifier is preferably AD 22055.
Specifically, the host CPU is at least an Intel core i5 or other processor with performance comparable to Intel core i 5.
As shown in fig. 1, the laser beam emitted by the laser displacement sensor is opposite to the back force applied to the tool nose of the tool on the tool rest, and is symmetrical in the horizontal plane with respect to the axis of the workpiece, and the specific installation position of the laser displacement sensor can be determined in turn according to the laser beam range of the selected laser displacement sensor.
Specifically, the host machine comprises an integrated circuit mainly comprising a CPU, and is used for measuring the back force F measured by the force measuring devicePThe deformation y measured by the deformation measuring device is introduced into a CPU after being processed by functional modules such as amplification, A/D conversion and the like, and the rigidity K is F in the CPU according to a formulapY is calculatedThe rigidity of the process system is output and displayed on a display, and a matched control panel is used for inputting an external instruction and displaying the back force F in real timePAnd the deformation amount y and the rigidity K.
The working principle is as follows: when the process system based on the common lathe works, a workpiece rotates at a high speed, and a force measuring device arranged in a tool rest measures the back force FPSignals are sent to the host, and F is paired in the hostPThe signal is amplified, A/D converted and other functional modules are processed and then sent to CPU for processing, meanwhile, the laser beam emitted by the laser displacement sensor irradiates the surface of the outer circle of the workpiece at the same axial position with the tool nose of the tool, the radial deformation y signal data of the rotating workpiece is measured and sent to the host, the deformation y data is amplified, A/D converted and other functional modules through the data acquisition card module in the host and then sent to CPU for processing, and the CPU processes the back force FpAnd the deformation amount y, and the like, the following functions are mainly realized:
(1) for the collected back force FpThe measured stiffness K is meaningful only if the deformation y is such that the data are synchronized with the operating state.
(2) For the collected data, according to the rigidity formula K ═ FpAnd obtaining the system rigidity K after the calculation processing of/y.
(3) Back force F to the relevant datapAnd the deformation amount y and the rigidity K are output and displayed.
(4) The central CPU and the control panel can realize data interaction and man-machine conversation functions.
In the use process, because the force measuring device is internally provided with the sensor, if the loading and the unloading are needed in the cutting process, the cutting process needs to be carried out slowly, so that the sensor is prevented from being overloaded and damaged due to too fast loading. In addition, because the main structure of the deformation measuring device is a laser displacement sensor, the deformation measuring device is a precise instrument, and the deformation measuring device needs to be kept properly, handled lightly, and the signal line of the sensor is forbidden to be pulled, and liquid such as water, oil stains and the like is forbidden to be sprayed on the sensor, otherwise the performance of the sensor is unstable, and even the sensor stops working.
Before the measuring tool is used, the force measuring device and the deformation measuring device are connected with the rear end electric connecting end of the instrument box, a power supply is switched on, the instrument can enter a measuring interface, man-machine interaction can be carried out by utilizing a display and a control panel, during measurement, each parameter of the system is to zero the measured values of the force measuring sensor and the laser displacement sensor, a machine tool is started after the zero setting, a special tool rest is used for processing a workpiece, and meanwhile, the measured values of the force measuring sensor and the laser displacement sensor and the calculated value of the dynamic stiffness K of the system are displayed in real time through the display.
The utility model provides a pair of dynamic stiffness survey device of process system based on center lathe can utilize this device directly to survey out process system dynamic stiffness, can not need again approximate simulation survey rigidity under quiescent condition, also can no longer need use loaded down with trivial details theory to deduce and calculate, can directly measure process system dynamic stiffness through experimental method under operating condition, and the survey process is simple, conveniently popularizes and applies, has very big promotion effect to relevant teaching and scientific research.
The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.
Claims (5)
1. The dynamic stiffness measuring device is characterized by comprising a force measuring device which is arranged on a lathe tool rest and used for measuring the back force applied to a cutter, wherein the force measuring device is electrically connected with a host machine, the host machine is also electrically connected with a deformation measuring device which is used for detecting the radial deformation of a workpiece, the deformation measuring device is arranged outside the lathe, the host machine is also electrically connected with a display and a control panel, and the display and the host machine are respectively and electrically connected with a power supply through control switches.
2. A dynamic stiffness measurement device for a lathe-based process system as claimed in claim 1, wherein the force measurement device comprises a cutting force measurement instrument, the cutting force measurement instrument being built into a lathe carriage.
3. A dynamic stiffness measurement device for a machine tool based process system as claimed in claim 1 wherein the load cell includes a load cell built into the tool post of the machine tool.
4. The dynamic stiffness measuring device of a lathe-based process system according to claim 1, wherein the deformation measuring device is a laser displacement sensor.
5. The dynamic stiffness measuring device of a lathe-based process system according to claim 1, wherein a signal amplifier for amplifying the back force detection signal is provided in a connection circuit between the deformation measuring device and the main machine.
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| CN201920866960.4U CN210024662U (en) | 2019-06-11 | 2019-06-11 | Dynamic stiffness measuring device of process system based on common lathe |
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| CN201920866960.4U CN210024662U (en) | 2019-06-11 | 2019-06-11 | Dynamic stiffness measuring device of process system based on common lathe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103078A (en) * | 2019-06-11 | 2019-08-09 | 贵州理工学院 | A kind of dynamic stiffness measurement device of the process system based on center lathe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103078A (en) * | 2019-06-11 | 2019-08-09 | 贵州理工学院 | A kind of dynamic stiffness measurement device of the process system based on center lathe |
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