CN116719276A - Optimization method and system based on numerical control machining program feed speed - Google Patents

Abstract

The application provides an optimization method and system based on a numerical control machining program feed speed, and relates to the technical field of numerical control machining. Matching a machine tool component with a machine tool in Vericut according to the motion relation and an accessory structure of the machine tool, and selecting a machine tool system and a cutter corresponding to the design; setting relevant parameters in preset three-dimensional software, checking, then importing the parameters into Vericut, and optimizing a required program by adopting at least one optimizing mode. After the numerical control machining program is optimized through Vericut, the feeding speed of the numerical control machining program changes along with the change of blank allowance, so that one person can realize three machines or four machines, the machining efficiency is improved, the cutter loss is reduced, and the machine tool is protected.

Description

Optimization method and system based on numerical control machining program feed speed

Technical Field

The application relates to the technical field of numerical control machining, in particular to a numerical control machining program feed speed-based optimization method and system.

Background

At present, numerical control machine tools are increasingly popular, numerical control machining technologies are also increasingly popularized, and for batch products or products with longer machining periods, how to reduce or replace repeated labor of workers, so that one person, two machines or three machines or even multiple machines in the numerical control machining industry are realized? What is the production model not realized with reduced production efficiency and increased tool consumption?

Some domestic enterprises always advance the feeding speed optimization in the numerical control production process, the advancing direction is mainly in the aspect of machine tool hardware, namely, the main shaft load in the machining process is perceived through adding a sensor, and when the main shaft load is larger than a set standard value, the machine tool reduces the speed; when the load of the main shaft is smaller than the set standard value, the machine tool is accelerated, namely the self-adaptive machining is realized. However, since the feed speed of the machine tool is very fast, the time interval for which the load of the spindle is fed back by the sensor is insufficient to change the feed speed in time, so that the domestic enterprises slowly discard the optimization mode.

However, the blank is uneven or can not be expressed in a computer through software, and the blank can not be optimized, so that the technical problem which is needed to be solved by the person skilled in the art is urgent.

Disclosure of Invention

The application aims to provide an optimization method based on a numerical control machining program feed speed, which can change along with the change of blank allowance after Vericut optimization, and specifically comprises the following steps: when the blank allowance is larger than the set standard, the feeding speed is reduced; when the blank allowance is smaller than the set standard, the feeding speed is increased, namely, the self-adaptive machining is performed.

Another object of the present application is to provide an optimizing system based on a feeding speed of a nc machining program, which is capable of running an optimizing method based on a feeding speed of a nc machining program.

Embodiments of the present application are implemented as follows:

in a first aspect, an embodiment of the present application provides a method for optimizing a feeding speed based on a numerical control machining program, including matching a machine tool component in Vericut according to a motion relationship and an accessory structure of the machine tool, and selecting a machine tool system and a tool corresponding to the designed machine tool; setting relevant parameters in preset three-dimensional software, checking, then importing the parameters into Vericut, and optimizing a required program by adopting at least one optimizing mode.

In some embodiments of the present application, the matching machine tool components according to the motion relation and the accessory structure of the machine tool in Vericut, and selecting the machine tool system and the tool corresponding to the design, includes: and (3) carrying out three-dimensional modeling on each component of the machine tool and blanks and workpieces required in numerical control machining, and carrying out corresponding simplification on the premise of not reducing the geometric space of each component of the machine tool in the modeling process so as to accelerate the simulation speed.

In some embodiments of the application, the foregoing further comprises: and optimizing the feeding speed by taking the feeding acceleration limit of the machine tool as a constraint according to the cutter position point and the processing feeding speed information in each component of the machine tool.

In some embodiments of the application, the foregoing further comprises: smoothing the machining feed speed by using a cubic B spline curve fitting method to obtain a final optimized machining feed speed curve, calculating the compensation quantity of each axis profile error by using the cutter point and the optimized machining feed speed, and realizing offline compensation of the cutter rail profile error, thereby improving the profile precision.

In some embodiments of the present application, the setting and checking the related parameters in the preset three-dimensional software, and then importing the parameters into Vericut, and optimizing the required program in at least one optimization mode includes: when the model of each component of the machine tool is built, the smoothness of the model is detected in preset three-dimensional software, and if the smoothness is unqualified, the model of each component of the machine tool is adjusted by changing the coordinates of the control points.

In some embodiments of the application, the foregoing further comprises: the optimization is performed by adopting an optimization mode of at least one of volume removal, chip thickness & volume, depth/width table, chip thickness & force, chip thickness & power and chip thickness only.

In some embodiments of the present application, the setting related parameters in the preset three-dimensional software and checking, then importing the parameters into Vericut, and optimizing the required program by adopting at least one optimization mode further includes: and combining the motion chain and the mutual position relation of the machine tool used for actual machining in the Vericut optimizing function module, and configuring a related operating system to optimize a program required by machining.

In some embodiments of the application, the foregoing further comprises: corresponding cutting parameters are designated for each cutting condition according to the current cutting condition and the material removal amount, and then a new numerical control NC code program is outputted.

In a second aspect, an embodiment of the present application provides an optimization system based on a feeding speed of a numerical control machining program, which includes a modeling module, configured to match a machine tool with a machine tool component in Vericut according to a motion relationship and an accessory structure of the machine tool, and select a machine tool system and a tool corresponding to the design;

and the optimizing module is used for setting related parameters in preset three-dimensional software, checking, then leading the parameters into Vericut, and optimizing a needed program by adopting at least one optimizing mode.

In some embodiments of the application, the above includes: at least one memory for storing computer instructions; at least one processor in communication with the memory, wherein the at least one processor, when executing the computer instructions, causes the system to perform: the modeling module and the optimizing module.

In a third aspect, embodiments of the present application provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method as any one of the methods of optimizing feed speed based on a numerical control machining program.

Compared with the prior art, the embodiment of the application has at least the following advantages or beneficial effects:

after being optimized by Vericut, the feeding speed of the numerical control machining program changes along with the change of blank allowance, and specifically comprises the following steps: when the blank allowance is larger than the set standard, the feeding speed is reduced; when the blank allowance is smaller than the set standard, the feeding speed is increased, namely, the self-adaptive machining is performed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of steps of an optimizing method based on a feeding speed of a numerical control machining program according to an embodiment of the present application;

FIG. 2 is a detailed schematic diagram of steps of an optimizing method based on a feeding speed of a numerical control machining program according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an optimizing system module based on a feeding speed of a numerical control machining program according to an embodiment of the present application;

fig. 4 is an electronic device provided in an embodiment of the present application.

Icon: 10-a modeling module; 20-an optimization module; 101-memory; 102-a processor; 103-communication interface.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

It should be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The various embodiments and features of the embodiments described below may be combined with one another without conflict.

Example 1

Referring to fig. 1, fig. 1 is a schematic diagram of steps of an optimizing method based on a feeding speed of a numerical control machining program according to an embodiment of the present application, which is as follows:

step S100, matching a machine tool component with a machine tool in Vericut according to the motion relation and the accessory structure of the machine tool, and selecting a machine tool system and a cutter corresponding to the design;

in some embodiments, the workpiece and the blank can be a blank in the original blank and the machining process and a numerical control machining program from three-dimensional software such as UG, pro/e and Cimeitron, and the workpiece and the blank can also be contained in an imported Vericut generated in special software, and a corresponding machine tool model is built in the Vericut.

In some embodiments, the machine model is created by analyzing the motion relationship between machine tool components, collecting relative positional parameters between machine tool components, adding the geometric model of the components and the settings of other machine tool parameters, respectively. Then calling a corresponding machine tool (machine tool file), calling a control system file matched with the machine tool, defining a woolen and machining coordinate system, establishing or calling a tool library, adding a program according to the machining process sequence, and setting a programming origin point to perform machine tool simulation. And then optimizing the numerical control program through the advantages of program speed optimization, the principle of program speed optimization, optimizing parameter setting, optimizing the program operation process, setting corresponding parameters in optimizing control, optimizing report and file comparison before and after optimization.

Step S110, setting relevant parameters in preset three-dimensional software, checking, then importing the parameters into Vericut, and optimizing a needed program in at least one optimization mode.

In some embodiments, a machine tool model is collocated: drawing the shape of each component of the machine tool in preset three-dimensional software, or calling out a machine tool model in the three-dimensional software, guiding out the STL format of each component, guiding into Vericut, matching the machine tool according to the motion relation and the accessory structure of the machine tool, and selecting a machine tool system and a tool corresponding to the designed machine tool;

then, introducing a workpiece, a blank (including a blank in a machining process) and a numerical control machining program into Vericut from preset three-dimensional software, setting related parameters, and checking whether problems of interference, over-cutting, machine tool collision, critical collision and the like exist;

finally, at least one (including one) optimization mode such as volume removal, chip thickness & volume, depth/width table, chip thickness & force, chip thickness & power, chip thickness only and the like is adopted in the Vericut optimization function module, corresponding cutting parameters are designated for each cutting condition according to the current cutting condition and material removal amount, and then a new numerical control NC code program is output. The program adds some program segments, except for improving the feed rate, or because of changing the feed rate, but does not change the original tool path.

Example 2

Referring to fig. 2, fig. 2 is a detailed schematic diagram of steps of an optimizing method based on a feeding speed of a numerical control machining program according to an embodiment of the present application, which is as follows:

step 200, three-dimensional modeling is carried out on each component of the machine tool and blanks and workpieces required in numerical control machining, and in the modeling process, corresponding simplification is carried out on the premise of not reducing the geometric space of each component of the machine tool so as to speed up simulation.

Step S210, optimizing the feeding speed by taking the feeding acceleration limit of the machine tool as a constraint according to the cutter position point and the processing feeding speed information in each component of the machine tool.

And S220, smoothing the machining feed speed by using a cubic B spline curve fitting method to obtain a final optimized machining feed speed curve, and calculating the error compensation quantity of each shaft profile by using the cutter point and the optimized machining feed speed to realize offline compensation of the cutter profile error, thereby improving the profile accuracy.

And step S230, when the model of each component of the machine tool is constructed, detecting the light smoothness in preset three-dimensional software, and if the light smoothness is not qualified, adjusting the model of each component of the machine tool by changing the coordinates of the control points.

And step S240, optimizing by adopting an optimization mode of at least one of volume removal, chip thickness & volume, depth/width table, chip thickness & force, chip thickness & power and chip thickness only.

Step S250, combining the motion chain and the mutual position relation of the machine tool used in actual machining in the optimizing function module of Vericut, configuring a related operating system, and optimizing a program required by machining.

Step S260, corresponding cutting parameters are designated for each cutting condition according to the current cutting condition and the material removal amount, and then a new numerical control NC code program is output.

In some embodiments, a three-dimensional model is built in UG modeling from the actual dimensions of the machine tool, and from the kinematic chain case, i.e. two main chains of drive-relations: machine tool body to blank and machine tool body to tool. The machine tool motion tree is built, all parts of the machine tool are output to all motion axis positions of Vericut software respectively in STL format files, and then assembly and rotation axis selection are carried out according to actual position relations. The machine tool simulation model which is the same as the actual motion situation is obtained through continuous debugging.

Process motion simulation was performed in software Vericut: the generated NC code file is input into the established machine tool motion simulation model to perform machine tool machining simulation, and whether the problems of interference, over-cutting, machine tool collision, critical collision and the like exist or not is checked. If the problem exists, the processing programming is modified, and if the problem does not exist, the VERIVU is applied to optimize the feeding speed.

An OptiPath module of Vericut software is applied to assign an optimal feed rate to each cutting condition according to the current cutting condition and the material removal amount, and then a new NC code program is outputted. The procedure is the same as the original except for improving the feed rate, and the original tool path is not changed.

In some embodiments, the cubic B-spline curve fitting algorithm divides the cubic B-spline curve equation B-spline curve into an approximate fitting and an interpolation fitting, wherein the approximate fitting is the characteristic point, the interpolation fitting is the characteristic point, but the interpolation fitting needs to obtain the control point through inverse calculation, and then the control point is fitted to the B-spline curve equation with the characteristic point. Two fitting algorithms will be presented here at a time. First, the curve equation for B-splines is described. The total equation for the B-spline curve is:

P(t)＝∑ni＝0PiFi,k(t)P(t)＝\sum_{i＝0}^{n}P_{i}F_{i,k}(t)(1)

where PiP _ i is the control music.

Aiming at the problems of running characteristics of a feed shaft in a 'continuous path' running mode in high-performance complex curved surface part high-feed speed machining, large line profile error of a cutter machining track curve and further reduction of surface profile precision of a high-performance complex curved surface part machining surface, the feed speed is optimized by using the jerk and the acceleration limit of the feed shaft machined by a numerical control machine tool as constraint conditions, and on the basis, the profile error compensation quantity of each feed shaft of the numerical control machine tool is calculated, so that the cutter machining track curve profile error compensation is realized, and finally, the profile precision of the high-performance complex curved surface part is improved.

Example 3

Referring to fig. 3, fig. 3 is a schematic diagram of an optimizing system module based on a feeding speed of a numerical control machining program according to an embodiment of the present application, which is as follows:

the modeling module 10 is used for importing a workpiece, a blank and a numerical control machining program into Vericut from preset three-dimensional software, and simultaneously building a corresponding machine tool model in Vericut;

and the optimizing module 20 is configured to optimize the required program in at least one optimizing mode in the optimizing functional module of Vericut.

As shown in fig. 4, an embodiment of the present application provides an electronic device including a memory 101 for storing one or more programs; a processor 102. The method of any of the first aspects described above is implemented when one or more programs are executed by the processor 102.

And a communication interface 103, where the memory 101, the processor 102 and the communication interface 103 are electrically connected directly or indirectly to each other to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The memory 101 may be used to store software programs and modules that are stored within the memory 101 for execution by the processor 102 to perform various functional applications and data processing. The communication interface 103 may be used for communication of signaling or data with other node devices.

The Memory 101 may be, but is not limited to, a random access Memory 101 (Random Access Memory, RAM), a Read Only Memory 101 (ROM), a programmable Read Only Memory 101 (Programmable Read-Only Memory, PROM), an erasable Read Only Memory 101 (Erasable Programmable Read-Only Memory, EPROM), an electrically erasable Read Only Memory 101 (Electric Erasable Programmable Read-Only Memory, EEPROM), etc.

The processor 102 may be an integrated circuit chip with signal processing capabilities. The processor 102 may be a general purpose processor 102, including a central processor 102 (Central Processing Unit, CPU), a network processor 102 (Network Processor, NP), etc.; but may also be a digital signal processor 102 (Digital Signal Processing, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.

In the embodiments provided in the present application, it should be understood that the disclosed method, system and method may be implemented in other manners. The above-described method and system embodiments are merely illustrative, for example, flow charts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of methods and systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

In addition, functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.

In another aspect, an embodiment of the application provides a computer readable storage medium having stored thereon a computer program which, when executed by the processor 102, implements a method as in any of the first aspects described above. The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory 101 (ROM), a random access Memory 101 (RAM, random Access Memory), a magnetic disk or an optical disk, or other various media capable of storing program codes.

In summary, the method and the system for optimizing the feeding speed based on the numerical control machining program provided by the embodiment of the application can change the feeding speed of the numerical control machining program along with the change of the blank allowance after the feeding speed is optimized through Vericut, and specifically comprise the following steps: when the blank allowance is larger than the set standard, the feeding speed is reduced; when the blank allowance is smaller than the set standard, the feeding speed is increased, namely, the self-adaptive machining is performed.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. The optimizing method based on the numerical control machining program feeding speed is characterized by comprising the following steps of:

matching a machine tool component with a machine tool in Vericut according to the motion relation and the accessory structure of the machine tool, and selecting a machine tool system and a cutter corresponding to the design;

setting relevant parameters in preset three-dimensional software, checking, then importing the parameters into Vericut, and optimizing a required program by adopting at least one optimizing mode.

2. The method for optimizing feed speed based on numerical control machining program as set forth in claim 1, wherein the matching the machine tool component in Vericut according to the motion relation and the accessory structure of the machine tool, and selecting the machine tool system and the tool corresponding to the designed machine tool comprises:

and (3) carrying out three-dimensional modeling on each component of the machine tool and blanks and workpieces required in numerical control machining, and carrying out corresponding simplification on the premise of not reducing the geometric space of each component of the machine tool in the modeling process so as to accelerate the simulation speed.

3. The method for optimizing feed speed based on a numerical control machining program according to claim 2, further comprising:

and optimizing the feeding speed by taking the feeding acceleration limit of the machine tool as a constraint according to the cutter position point and the processing feeding speed information in each component of the machine tool.

4. A method of optimizing feed rate based on a numerical control machining program as set forth in claim 3, further comprising:

smoothing the machining feed speed by using a cubic B spline curve fitting method to obtain a final optimized machining feed speed curve, calculating the compensation quantity of each axis profile error by using the cutter point and the optimized machining feed speed, and realizing offline compensation of the cutter rail profile error, thereby improving the profile precision.

5. The optimizing method based on the feeding speed of the numerical control machining program according to claim 1, wherein the steps of setting relevant parameters in preset three-dimensional software, checking, then importing the parameters into Vericut, and optimizing the required program in at least one optimizing mode include:

when the model of each component of the machine tool is built, the smoothness of the model is detected in preset three-dimensional software, and if the smoothness is unqualified, the model of each component of the machine tool is adjusted by changing the coordinates of the control points.

6. The method of optimizing feed rate based on a numerical control machining program as set forth in claim 5, further comprising:

the optimization is performed by adopting an optimization mode of at least one of volume removal, chip thickness & volume, depth/width table, chip thickness & force, chip thickness & power and chip thickness only.

7. The optimizing method based on the feeding speed of the numerical control machining program according to claim 1, wherein the steps of setting relevant parameters in preset three-dimensional software, checking, then importing the parameters into Vericut, and optimizing the required program by adopting at least one optimizing mode further comprise:

and combining the motion chain and the mutual position relation of the machine tool used for actual machining in the Vericut optimizing function module, and configuring a related operating system to optimize a program required by machining.

8. The method of optimizing feed rate based on a numerical control machining program as set forth in claim 7, further comprising:

corresponding cutting parameters are designated for each cutting condition according to the current cutting condition and the material removal amount, and then a new numerical control NC code program is outputted.

9. An optimizing system based on numerical control machining program feed speed, which is characterized by comprising:

the modeling module is used for matching the machine tool assembly with the machine tool in the Vericut according to the motion relation and the accessory structure of the machine tool, and selecting and matching a machine tool system and a cutter corresponding to the design;

and the optimizing module is used for setting related parameters in preset three-dimensional software, checking, then leading the parameters into Vericut, and optimizing a needed program by adopting at least one optimizing mode.

10. A computer readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the method according to any of claims 1-8.