Composite milling center and control system thereof

Abstract

The invention relates to the technical field of milling machining, and discloses a composite milling machining center and a control system thereof, the milling machining center adopts an upper and lower computer structure, machining equipment adopts a structure of a tool changing main shaft and a drilling bag, the requirements of milling and rapid drilling are both considered and met, list machining is adopted, and the machining efficiency is improved. The problem that traditional multi-variety single-piece machining needs frequent manual program switching is solved, the production efficiency is improved, manual misoperation is reduced, the suction cup can lift a workpiece, a cutter can be lowered to the position below the workpiece, the problems of cutter milling and side edge milling at any angle are solved, and the machining efficiency is improved. The parameterized tool path is written in advance through software, and the tool path is adjusted by adjusting parameters, so that the efficiency is improved, and the requirements on operators are also reduced.

Description

Technical Field

[0001] The invention relates to the technical field of milling processing, and in particular to a compound milling processing center and a control system thereof. Background Art

[0002] Drilling, sawing and milling are common processes in the furniture industry. The drilling, sawing and milling compound processing center is designed to achieve the three processings at the same time. At present, the CNC system of numerical control equipment loads a processing file, and then processes in batches. After the batch of products is processed, the next processing file is selected and loaded (manual selection, loading or sending is required). This method cannot adapt to the mixed production line of multiple varieties and single pieces, as well as the high-efficiency production needs, and is also not conducive to the information management of production and factories.

[0003] At the same time, the current CNC system of numerical control equipment cannot realize real-time monitoring of the working status of the milling machining center. Most of them are detected periodically by manual labor. This method has a strong lag and may cause processing failure, thereby wasting production resources. Summary of the invention

[0004] The purpose of the present invention is to provide a composite milling machining center and a control system thereof to solve the above technical problems.

[0005] A composite milling machining center, the machining center comprising: an upper control component and a lower motion component;

[0006] The upper control component is responsible for data processing and human-computer interaction, and the lower motion component is responsible for the execution of processing actions;

[0007] The upper control assembly includes an electrical box and an operating table;

[0008] The lower motion assembly includes a mounting frame, four light curtain support frames are arranged in an array on both sides of the mounting frame, a processing device is arranged on one side of the top of the mounting frame, a plurality of movable aluminum squares are arranged in an array on the other side of the top of the mounting frame, each of the aluminum squares is provided with a plurality of suction cups for easy disassembly, and two symmetrically distributed foot switches are arranged on both sides of the bottom of the mounting frame;

[0009] A positioning rod and a bracket are provided at the bottom of the aluminum square. The bracket is used to control the lifting of the aluminum square, and the positioning rod is used to fix the position of the aluminum square.

[0010] The lower motion assembly also includes a vacuum pump, which is used to control the suction cup.

[0011] A control system for a composite milling machining center, wherein the working method of the control system comprises:

[0012] Step S1, the central control software extracts and analyzes the processing information file;

[0013] Step S2, setting the workstation and auxiliary parameters;

[0014] Step S3: After activating the processing, according to the processing information previously extracted by the central control software and the configuration of the tool table, the tool is automatically matched to output the processing G code file of the current panel to be processed, and sent to the controller;

[0015] Step S4, loading the board and starting processing;

[0016] Step S5: After the processing is completed, the controller feeds back a completion signal to the central control software, and the central control software generates a processing G code for the next plate to be processed and sends it to the controller;

[0017] Step S6, continue to the next board and start processing.

[0018] As a further description of the solution of the present invention, the specific working process of step S4 includes:

[0019] Step S41, according to the size of the panel, move the aluminum square left and right, and select a suitable position to place the suction cup;

[0020] Step S42, stepping on one of the foot switches to lift the positioning rod and the bracket;

[0021] Step S43, loading;

[0022] Step S44, step on another foot switch to start the vacuum pump adsorption and lower the bracket.

[0023] As a further description of the solution of the present invention, the system is also provided with a parameter monitoring module for monitoring the working parameters of the compound milling machining center during operation, analyzing the working parameters, and evaluating the working status of the compound milling machining center.

[0024] As a further description of the solution of the present invention, the specific working process of evaluating the working status of the composite milling machining center includes:

[0025] First, the processing risk coefficient is calculated according to the processing parameters;

[0026] Secondly, calculate the product risk factor based on the parameters of the finished product;

[0027] Finally, the working status of the compound milling machining center is evaluated according to the finished product processing risk factor and the product risk factor.

[0028] As a further description of the solution of the present invention, the process of obtaining the processing risk coefficient includes:

[0029] According to the properties of the material to be processed and the processing requirements, the standard data curve V0(t) of the milling speed changing with time and the standard data curve W0(t) of the tool speed changing with time during the milling process are set;

[0030] Obtain the actual data curve V(t) of milling speed changing with time and the actual data curve W(t) of tool speed changing with time during milling process;

[0031] The processing risk factor is calculated by the following formula:

[0032]

[0033] Among them, f(V(t), W(t))=πdW(t) / 1000;

[0034] Where ρ is the machining risk coefficient, t1 is the machining start time, t2 is the machining end time, f(V(t), W(t)) is the milling speed-tool speed relationship function, α, β and γ are weight coefficients, and d is the tool observation point diameter.

[0035] As a further description of the solution of the present invention, the process of obtaining the product risk coefficient includes:

[0036] Obtain the actual parameter values ​​of the finished product after milling, and then calculate the product risk factor using the following formula:

[0037]

[0038] Among them, σ is the product risk coefficient, n is the number of parameter items, i∈[1,n]; A i is the detection value of the i-th parameter, A i0 is the standard value of the i-th parameter, d i is the reference value of the i-th parameter, k i is the weight coefficient of the i-th parameter.

[0039] As a further description of the solution of the present invention, the process of evaluating the working status of the compound milling machining center includes:

[0040] The mathematical model of the working state coefficient of the compound milling machining center is constructed, and the expression is:

[0041] C = ρ * σ;

[0042] The working state coefficient C of the compound milling machining center is compared with the set working state coefficient threshold C0 of the compound milling machining center. If C is greater than or equal to C0, it is judged that the operating state of the compound milling machining center is abnormal; otherwise, it is judged that the operating state of the compound milling machining center is normal.

[0043] Beneficial effects of the present invention: 1. The milling machining center of the present invention adopts an upper and lower computer structure, that is, the upper computer is a PC, and the lower computer is a motion controller; the PC is responsible for data processing and human-computer interaction, and the lower computer is responsible for the execution of machining actions. The upper and lower computers are connected and communicated via PCI-E. The machining equipment adopts a tool-changing spindle plus a drill package structure, which takes into account and meets the needs of milling and fast drilling. The present invention adopts list processing to solve the trouble of frequent manual program switching required for traditional multi-variety single-piece processing, and also improves production efficiency and reduces manual misoperation. The suction cup provided in the present invention can lift the workpiece and the knife can be lowered under the workpiece, which solves the problem of profile milling and milling processing at any angle of the side. The parameterized tool path is written in advance by the software, and the tool path is adjusted by adjusting the parameters, which improves efficiency and reduces the requirements of the operator.

[0044] 2. The present invention obtains the standard data curve V0(t) of the milling speed changing with time and the standard data curve W0(t) of the tool speed changing with time during the machining process according to the properties of the material to be machined, and then monitors the actual data curve V(t) of the milling speed changing with time and the actual data curve W(t) of the tool speed changing with time during the milling process in real time, and substitutes the obtained parameters into the formula to calculate the machining risk coefficient of the milling machining center, obtains the actual parameter values ​​of the finished product after the milling process is completed, and calculates the product risk coefficient in combination with the standard values ​​of various parameters, and constructs the working state coefficient C of the composite milling machining center calculated by the mathematical model of the working state coefficient of the composite milling machining center according to the machining risk coefficient and the product risk coefficient, and compares the working state coefficient C of the composite milling machining center with the set working state coefficient threshold C0 of the composite milling machining center. If C is greater than or equal to C0, it is judged that the operating state of the composite milling machining center is abnormal, otherwise, it is judged that the operating state of the composite milling machining center is normal. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described below in conjunction with the accompanying drawings.

[0046] Figure 1 This is a schematic diagram of the structure of a composite milling machining center provided by the present invention. Figure 1 ;

[0047] Figure 2 This is a schematic diagram of the structure of a composite milling machining center provided by the present invention. Figure 2 ;

[0048] Figure 3 It is a station layout diagram of a composite milling machining center provided by the present invention;

[0049] Figure 4 The present invention is a schematic diagram of a positioning mechanism of a composite milling machining center. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] See also Figure 1 , Figure 2 As shown, the present invention is a compound milling machining center, the machining center comprises: an upper control component and a lower motion component;

[0052] The upper control component is responsible for data processing and human-computer interaction, and the lower motion component is responsible for the execution of processing actions;

[0053] The upper control assembly includes an electrical box 1 and an operating table 2;

[0054] The lower motion assembly comprises a mounting frame 3, four light curtain support frames 4 are arranged in an array on both sides of the mounting frame 3, a processing device 5 is arranged on one side of the top of the mounting frame 3, a plurality of movable aluminum squares 6 are arranged in an array on the other side of the top of the mounting frame 3, each of the aluminum squares 6 is provided with a plurality of suction cups 7 for easy disassembly, and two symmetrically distributed foot switches 8 are arranged on both sides of the bottom of the mounting frame 3;

[0055] A positioning rod and a bracket are provided at the bottom of the aluminum square 6. The bracket is used to control the lifting of the aluminum square 6, and the positioning rod is used to fix the position of the aluminum square 6.

[0056] The lower motion assembly further comprises a vacuum pump, which is used to control the suction cup 7 .

[0057] Through the above technical scheme, the milling machining center of the present invention adopts an upper and lower computer structure, that is, the upper computer is a PC, and the lower computer is a motion controller; the PC is responsible for data processing and human-computer interaction, and the lower computer is responsible for the execution of machining actions. The upper and lower computers are connected and communicated through PCI-E. The machining equipment 5 adopts a tool-changing spindle plus a drill package structure, which takes into account and meets the needs of milling and fast drilling. The present invention adopts list processing to solve the trouble of frequent manual switching of programs required for traditional multi-variety single-piece processing, and also improves production efficiency and reduces manual misoperation. The suction cup provided in the present invention can lift the workpiece and the knife can go under the workpiece, which solves the problem of profile milling and milling processing at any angle of the side. The parameterized tool path is written in advance by the software, and the tool path is adjusted by adjusting the parameters, which improves efficiency and reduces the requirements of the operator.

[0058] A control system for a composite milling machining center, wherein the working method of the control system comprises:

[0059] Step S1, the central control software extracts and parses multiple processing information files, the file format is MPR, BAN, DXF, XML, etc. output by the order splitting software;

[0060] Step S2, setting the workstation and auxiliary parameters;

[0061] Step S3, after activating the processing, according to the processing information previously extracted by the central control software, such as the position, depth and size of the hole or slot and the configuration of the tool table, the tool is automatically matched to output the processing G code file of the current plate to be processed, and sent to the controller;

[0062] Step S4, loading the board and starting processing;

[0063] Step S5: After the processing is completed, the controller feeds back a completion signal to the central control software, and the central control software generates a processing G code for the next plate to be processed and sends it to the controller;

[0064] Step S6, continue to the next board and start processing.

[0065] See also Figure 3 , Figure 4 The workstations are that the processing table has a total of 4 origins, that is, 4 groups of backings, divided into left and right areas, and the processing table is divided into: left area front backing full table workstation N, left area front backing left table workstation S, left area back backing full table workstation N1, left area back backing left table workstation S1, right area front backing full table workstation M, right area front backing right table workstation R, right area back backing full table workstation M1, right area back backing right table workstation R1, a total of 8 workstations;

[0066] The auxiliary parameters include processing mode and processing method selection, among which the processing modes are: default (processing at N stations), single-zone fixed processing (any of the 8 stations can be selected), double-zone fixed processing (select one of the stations N, S, N1, S1 in the left zone, and select one of the stations MRM1, R1 in the right zone), and four-plate mode (processing is performed at four stations S, S1, R, and R1); the processing methods are: sequential processing (processing is completed in the order of loading), and reciprocating processing (after processing is completed, return to the first one to continue processing).

[0067] As a further description of the solution of the present invention, the specific working process of step S4 includes:

[0068] Step S41, according to the size of the plate, move the aluminum square 6 left and right, and select a suitable position to place the suction cup 7;

[0069] Step S42, step on one of the foot switches 8 to lift the positioning rod and the bracket;

[0070] Step S43, loading;

[0071] Step S44, step on another foot switch 8 to start the vacuum pump adsorption and lower the bracket.

[0072] As a further description of the solution of the present invention, the system is also provided with a parameter monitoring module for monitoring the working parameters of the compound milling machining center during operation, analyzing the working parameters, and evaluating the working status of the compound milling machining center.

[0073] As a further description of the solution of the present invention, the specific working process of evaluating the working status of the composite milling machining center includes:

[0074] First, the processing risk coefficient is calculated according to the processing parameters;

[0075] Secondly, calculate the product risk factor based on the parameters of the finished product;

[0076] Finally, the working status of the compound milling machining center is evaluated according to the finished product processing risk factor and the product risk factor.

[0077] As a further description of the solution of the present invention, the process of obtaining the processing risk coefficient includes:

[0078] According to the properties of the material to be processed and the processing requirements, the standard data curve V0(t) of the milling speed changing with time and the standard data curve W0(t) of the tool speed changing with time during the milling process are set;

[0079] Obtain the actual data curve V(t) of milling speed changing with time and the actual data curve W(t) of tool speed changing with time during milling process;

[0080] The processing risk factor is calculated by the following formula:

[0081]

[0082] Among them, f(t(t), W(t))=πdW(t) / 1000;

[0083] Where ρ is the machining risk coefficient, t1 is the machining start time, t2 is the machining end time, f(V(t), W(t)) is the milling speed-tool speed relationship function, α, β and γ are weight coefficients, and d is the tool observation point diameter.

[0084] As a further description of the solution of the present invention, the process of obtaining the product risk coefficient includes:

[0085] Obtain the actual parameter values ​​of the finished product after milling, and then calculate the product risk factor using the following formula:

[0086]

[0087] Among them, σ is the product risk coefficient, n is the number of parameter items, i∈[1,n]; A i is the detection value of the i-th parameter, A i0 is the standard value of the i-th parameter, d i is the reference value of the i-th parameter, k i is the weight coefficient of the i-th parameter.

[0088] As a further description of the solution of the present invention, the process of evaluating the working status of the compound milling machining center includes:

[0089] The mathematical model of the working state coefficient of the compound milling machining center is constructed, and the expression is:

[0090] C = ρ * σ;

[0091] The working state coefficient C of the compound milling machining center is compared with the set working state coefficient threshold C0 of the compound milling machining center. If C is greater than or equal to C0, it is judged that the operating state of the compound milling machining center is abnormal; otherwise, it is judged that the operating state of the compound milling machining center is normal.

[0092] Through the above technical scheme, this embodiment obtains the standard data curve V0(t) of the milling speed changing with time and the standard data curve W0(t) of the tool speed changing with time during the machining process according to the properties of the material to be machined, and then monitors the actual data curve V(t) of the milling speed changing with time and the actual data curve W(t) of the tool speed changing with time during the milling process in real time, and substitutes the obtained parameters into the formula to calculate the machining risk coefficient of the milling machining center, obtains the actual parameter values ​​of the finished product after the milling process is completed, and calculates the product risk coefficient in combination with the standard values ​​of various parameters, and constructs the working state coefficient C of the composite milling machining center calculated by the mathematical model of the working state coefficient of the composite milling machining center according to the machining risk coefficient and the product risk coefficient, and compares the working state coefficient C of the composite milling machining center with the set working state coefficient threshold C0 of the composite milling machining center. If C is greater than or equal to C0, it is judged that the operating state of the composite milling machining center is abnormal, otherwise, it is judged that the operating state of the composite milling machining center is normal.

[0093] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A compound milling machining center, characterized in that: The machining center comprises: an upper control component and a lower motion component; The upper control component is responsible for data processing and human-computer interaction, and the lower motion component is responsible for the execution of processing actions; The upper control component comprises an electrical box (1) and an operating table (2); The lower motion component comprises a mounting frame (3), four light curtain support frames (4) are arranged in an array on both sides of the mounting frame (3), a processing device (5) is arranged on one side of the top of the mounting frame (3), a plurality of movable aluminum squares (6) are arranged in an array on the other side of the top of the mounting frame (3), each of the aluminum squares (6) is provided with a plurality of suction cups (7) for easy disassembly, and two foot switches (8) are symmetrically arranged on both sides of the bottom of the mounting frame (3); A positioning rod and a bracket are provided at the bottom of the aluminum square (6), the bracket is used to control the lifting of the aluminum square (6), and the positioning rod is used to fix the position of the aluminum square (6); The lower motion assembly further comprises a vacuum pump, which is used to control the suction cup (7).

2. A control system for a composite milling machining center, used to control the composite milling machining center according to claim 1, characterized in that: The working method of the control system includes: Step S1, the central control software extracts and analyzes the processing information file; Step S2, setting the workstation and auxiliary parameters; Step S3: After activating the processing, according to the processing information previously extracted by the central control software and the configuration of the tool table, the tool is automatically matched to output the processing G code file of the current panel to be processed, and sent to the controller; Step S4, placing the board on the plate and starting processing; Step S5: After the processing is completed, the controller feeds back a completion signal to the central control software, and the central control software generates a processing G code for the next plate to be processed and sends it to the controller; Step S6, continue to the next board and start processing.

3. The control system of a compound milling machining center according to claim 2, characterized in that: The specific working process of step S4 includes: Step S41, according to the size of the plate, move the aluminum square (6) left and right, and select a suitable position to place the suction cup (7); Step S42, stepping on one of the foot switches (8) to lift the positioning rod and the bracket; Step S43, loading; Step S44, step on another foot switch (8) to start the vacuum pump adsorption and lower the bracket.

4. The control system of a compound milling machining center according to claim 3, characterized in that: The system is also provided with a parameter monitoring module for monitoring the working parameters of the compound milling machining center during operation, analyzing the working parameters, and evaluating the working status of the compound milling machining center.

5. The control system of a compound milling machining center according to claim 4, characterized in that: The specific working process of evaluating the working status of the compound milling machining center includes: First, the processing risk coefficient is calculated according to the processing parameters; Secondly, calculate the product risk factor based on the parameters of the finished product; Finally, the working status of the compound milling machining center is evaluated according to the finished product processing risk factor and the product risk factor.

6. The control system of a compound milling machining center according to claim 5, characterized in that: The process of obtaining the processing risk coefficient includes: According to the properties of the material to be processed and the processing requirements, the standard data curve V0(t) of the milling speed changing with time and the standard data curve W0(t) of the tool speed changing with time during the milling process are set; Obtain the actual data curve V(t) of milling speed changing with time and the actual data curve W(t) of tool speed changing with time during milling process; The processing risk factor is calculated by the following formula: Among them, f(V(t), W(t))=πdW(t) / 1000; Where ρ is the machining risk coefficient, t1 is the machining start time, t2 is the machining end time, f(V(t), W(t)) is the milling speed-tool speed relationship function, α, β and γ are weight coefficients, and d is the tool observation point diameter.

7. The control system of a compound milling machining center according to claim 5, characterized in that: The process of obtaining the product risk coefficient includes: Obtain the actual parameter values ​​of the finished product after milling, and then calculate the product risk factor using the following formula: Among them, σ is the product risk coefficient, n is the number of parameter items, i∈[1,n]; A i is the detection value of the i-th parameter, A iO is the standard value of the i-th parameter, d i is the reference value of the i-th parameter, k i is the weight coefficient of the i-th parameter.

8. The control system of a compound milling machining center according to claim 5, characterized in that: The process of evaluating the working status of the compound milling machining center includes: The mathematical model of the working state coefficient of the compound milling machining center is constructed, and the expression is: C = ρ * σ; The working state coefficient C of the compound milling machining center is compared with the set working state coefficient threshold C0 of the compound milling machining center. If C is greater than or equal to C0, it is judged that the operating state of the compound milling machining center is abnormal; otherwise, it is judged that the operating state of the compound milling machining center is normal.

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