CN102540975A - Turning and cutting control method of trivariant screw - Google Patents

Abstract

The invention relates to a turning and cutting control method of a trivariant screw, which comprises the following steps: (1) establishing a corresponding mathematic model; (2) converting the mathematic model to a method that guides a numerical control (NC) machine to conduct machining, developing a human-computer interface of a trivariant screw machining program by using Visual Basic language, and automatically generating the NC code of a numerical control program and simulating manufacturing of the numerical control code; (3) introducing Cut Viewer Turn special software to verify; and (4) actually operating with the numerical control machine. The method has low machining cost, and is simple and easy to use with no need to improve the device and purchase an advanced multi-axis linkage numerical control machine. Trivariant screws can be machined on many of exiting numerical control machines by only introducing a machining control program.

Description

Three become screw rods car, cut processing control method

Technical field:

The present invention relates to a kind of job operation of numerically controlled lathe, be specifically related to a kind of profiled screw, be i.e. the turning processing control method of three change screw rods of varying pitch, change groove depth, change groove width.

Background technology:

Three become screw rod is used for waterproof nylon slide fastener make-up machine; It is the screw rod in a kind of injection molding apparatus; This screw rod has varying pitch, change groove depth, becomes the modification characteristics of groove width (promptly three become screw rods); Be a kind of profiled screw of hi-tech, the structure of this screw rod will directly influence the injection mo(u)lding result of slide fastener make-up machine, influence the quality of waterproof nylon slide fastener product.

At present, three change screw rods are the difficult points in the profiled screw processing, at present domestic process equipments such as numerically-controlled machine, can't satisfy the processing technology requirement of this kind type shape screw rod; And external process technology all receives the protection of patent.In order to change this situation, the inventor proves new processing scheme through setting up mathematical model, arrives the numerically controlled lathe looming practice at last, and the final following new method of employing that confirms can process three anomaly screw rods fully.

Summary of the invention:

The purpose of this invention is to provide a kind of three become screw rods car, cut processing control method; It can be on common numerically-controlled machine; Through working out the program of corresponding digital control processing; Utilize the serial line interface loading routine, instruct numerically-controlled machine to carry out turning processing, thereby process the three change screw rods that suit the requirements.

In order to solve the existing problem of background technology; The present invention adopts following technical scheme: its operation steps is: 1, set up corresponding mathematical model; Shaping principle according to profiled screw; Set up polynomial expression variable-pitch propeller line, semisinusoidal and become and quicken helix, the even mathematical model of quickening helix, be three become screw rods digital control processing control provide fundamental basis; 2, this mathematical model is changed into instruct the numerically-controlled machine method for processing, utilize Visual Basic language development to go out the man-machine window interface that processing three becomes the screw rod programs, generate nc program NC code automatically, and this numerical control code is carried out machining simulation; 3, in order to verify the correctness of this job sequence; Introduce the checking of CutViewer Turn special software subsequently, CutViewer Turn is the application software that is specifically designed to the numerical control program machining simulation, can carry out milling emulation and turning emulation; The checking result shows that method is feasible fully; 4, use the numerically-controlled machine practical operation, this program is tested on the FANUC numerically-controlled machine, successfully processes one section three and becomes screw rod.

The present invention is based upon on the basis of mathematical model, is to obtain through lot of data analysis and calculating, and these data are used to instruct the program of establishment digital control processing, and the program that produces at last is also also uncomplicated, and this control method has originality and characteristic.

The present invention has following beneficial effect:

Abolish the patent monopolization of external numerically-controlled machine processing technology; Provide a kind of and just can produce the method for profiled screw through turning process for domestic, it is low that this method has processing cost, is simple and easy to the characteristics of usefulness; Need not improve equipment; Need not buy advanced multi-axis linkage numerical control lathe, only need to introduce the control program of one section processing, on a lot of existing numerically-controlled machines, just can process three anomaly screw rods.

Embodiment:

This embodiment adopts following technical scheme: its operation steps is: 1, set up corresponding mathematical model; Shaping principle according to profiled screw; Set up polynomial expression variable-pitch propeller line, semisinusoidal and become and quicken helix, the even mathematical model of quickening helix, be three become screw rods digital control processing control provide fundamental basis; 2, this mathematical model is changed into instruct the numerically-controlled machine method for processing, utilize Visual Basic language development to go out the man-machine window interface that processing three becomes the screw rod programs, generate nc program NC code automatically, and this numerical control code is carried out machining simulation; 3, in order to verify the correctness of this job sequence; Introduce the checking of CutViewer Turn special software subsequently, CutViewer Turn is the application software that is specifically designed to the numerical control program machining simulation, can carry out milling emulation and turning emulation; The checking result shows that method is feasible fully; 4, use the numerically-controlled machine practical operation, this program is tested on the FANUC numerically-controlled machine, successfully processes one section three and becomes screw rod.

This embodiment is to be based upon on the basis of mathematical model, is to obtain through lot of data analysis and calculating, and these data are used to instruct the program of establishment digital control processing, and the program that produces at last is also also uncomplicated, and this control method has originality and characteristic.

Three become the mathematics model analysis of screw rod: according to the shaping principle of profiled screw; Set up polynomial expression variable-pitch propeller line, semisinusoidal change acceleration helix, the even mathematical model of quickening helix; The characteristics of various variable-pitch propeller lines have been discussed, for the digital control processing control of studying three change screw rods is provided fundamental basis respectively.

The mathematical model of three change screw rods is explained as follows:

The equidistant helix equation:

$\left\{\begin{array}{c}P=P_{\mathrm{const}}\\ L=P_{\mathrm{const}}\×i\\ V=\frac{\mathrm{dL}}{\mathrm{dt}}=P_{\mathrm{const}}\×n\end{array}\right.---\left(1\right)$

P in the system of equations (1) _ConstFixed pitch for equidistant helix.

Polynomial expression helix equation:

$\left\{\begin{array}{c}L=P_{0}i+(4L_m-P_m{i}_m-3P_0{i}_m)i^3/i_m^3+(\frac{1}{2}{P}_m{i}_m+\frac{3}{2}{P}_0{i}_m-2L_m)i^4/i_m^4\\ P=P_0+(12L_m-3P_m{i}_m-9P_0{i}_m)i^2/i_m^3+(2P_m{i}_m+6P_0{i}_m-8L_m)i^3/i_m^4\\ H=H_0+\frac{i}{i_m}\mathrm{\ΔH}\\ d=d_0+\frac{i}{i_m}\mathrm{\Δd}\end{array}\right.---\left(2\right)$

Become and quicken the helix equation:

$\left\{\begin{array}{c}L=\frac{P_m+P_0}{2}i-\frac{i_m}{\mathrm{\π}}\×\frac{P_m-P_0}{2}\sin \left(\frac{i}{i_m}\mathrm{\π}\right)\\ P=\frac{P_m+P_0}{2}-\frac{P_m-P_0}{2}\cos \left(\frac{i}{i_m}\mathrm{\π}\right)\\ H=H_0+\frac{i}{i_m}\mathrm{\ΔH}\\ d=d_0+\frac{i}{i_m}\mathrm{\Δd}\end{array}\right.---\left(3\right)$

$\left\{\begin{array}{c}L=i\×P_0+i^2\×\mathrm{\ΔP}\\ P=P_0+(2i-1)\×\mathrm{\ΔP}\\ H=H_0+\frac{i}{i_m}\mathrm{\ΔH}\\ d=d_0+\frac{i}{i_m}\mathrm{\Δd}\end{array}\right.---\left(4\right)$

When the screw rod uniform rotation, the axial velocity V on the screw spiral line then:

V＝p×n＝p ₀×n+Δp×n(2i-1) (5)

The axial acceleration of variable-pitch propeller line screw rod, through differentiate can get acceleration a to speed V:

$a=\frac{\mathrm{dV}}{\mathrm{dt}}=n\frac{\mathrm{dV}}{\mathrm{di}}=2n^2\mathrm{\ΔP}---\left(6\right)$

Three become the numerical control program exploitation and machining simulation explanation of screw rod:

1, the numerical control program exploitation and the machining simulation of three change screw rods; At first analyze the processing features of three change screw rods; According to mathematical model; Utilize Visual Basic language development to go out the man-machine window interface that processing three becomes the screw rod program, generate nc program NC code automatically, and this numerical control code is carried out machining simulation.

2, programme to the digital control processing of three change screw rods; At first in Visual Basic, set up one three window interface that becomes the screw rod job sequence; The parameter object attribute, input text frame, order button of shaping screw etc. then are set on user interface, in program code, add then three become screw rods the mathematical model expression formula, through click event " calculatings " button execution event procedure; Accomplish the computing of program code; The text of output nc program generates the application program that suffix is called " .exe " at last, and detailed VB program code is seen appendix B.Move this application program; Eject the man-machine window interface of " calculating the screw rod job sequence "; Import three change screw rod parameters to be processed; The correlation parameters such as length, pitch, groove depth, groove width that comprise screw rod, button click " calculating " can generate this three become the numerical control NC program code of screw rod text.

Embodiment:

On the FANUC numerically-controlled machine, the column type mould steel of processing is fixed with tool, set relative program; Choose the cutter that carries out turning processing (, selecting different numbering cutters for use) according to the actual conditions of the groove depth of each section groove of screw rod, groove width, pitch, compiled program after; Utilize the nc program of serial line interface transmission screw rod, end of transmission can attempt calling relevant program; Attempt a room feed (not adding tool and mould steel), after obtaining relevant three-dimensional coordinate parameter, further adjust vernier device and tool; To guarantee the time processing moulding, this also is an important method that improves the converted products qualification rate.Treat all ready after, start numerically-controlled machine equipment, formal processing and manufacturing three becomes screw rods, treat that three sections program run finish after, three become screw rods processing just accomplished, finished product is unloaded from tool, measure, check, warehouse-in.Like this, one section digital control processing of satisfying critical component shaping screw in the waterproof nylon slide fastener make-up machine has just been accomplished.

On the FANUC numerically-controlled machine, utilize the nc program of serial line interface transmission screw rod, processing and manufacturing three becomes screw rod.Through detect three become screw rods parameter, and compare analysis with theoretical model, the result show three become screw rods nc program be rationally feasible, satisfy the digital control processing requirement of critical component shaping screw in the waterproof nylon slide fastener make-up machine.

Claims (1)

1. Three become screw rods car, cut processing control method; The operation steps that it is characterized in that it is: 1, set up corresponding mathematical model; Shaping principle according to profiled screw; Set up polynomial expression variable-pitch propeller line, semisinusoidal and become and quicken helix, the even mathematical model of quickening helix, be three become screw rods digital control processing control provide fundamental basis; 2, this mathematical model is changed into instruct the numerically-controlled machine method for processing, utilize Visual Basic language development to go out the man-machine window interface that processing three becomes the screw rod programs, generate nc program NC code automatically, and this numerical control code is carried out machining simulation; 3, in order to verify the correctness of this job sequence; Introduce the checking of CutViewer Turn special software subsequently, CutViewer Turn is the application software that is specifically designed to the numerical control program machining simulation, can carry out milling emulation and turning emulation; The checking result shows that method is feasible fully; 4, use the numerically-controlled machine practical operation, this program is tested on the FANUC numerically-controlled machine, successfully processes one section three and becomes screw rod.