Archive for the ‘Uncategorised’ Category

In the next stage, the same example will be explored

Tuesday, September 5th, 2017

-step or derly


pro ce dure for any op er a tion or ac tiv ity (only a very ge neric model is pre sented here):


1 Start program


Initialization – defaults – cancellations – units,


2 Input data


Tool – spindle – location – clearances,


3 Process data


drill Machine


Cycles – macros – feedrates – offsets,


4 Output result


Actual machining – this is the main program objective


5 Stop program


Clear conditions,


This method will work well on a sin gle data in put (sin gle process), ev ery time For ex am ple,


the preceding five ge neric steps can rep angle machine re sent drill ing of a sin gle hole, at any desired lo ca tion


Now re place the ge neric terms with spe cific drill ing op er a tions (all five step num bers match):


1 Start program


same as


1 Start program


2 Input XYZ hole location


same as


2 Input data


3 Move to the new location


same as


3 Process data


4 Drill the hole


same as


4 cnc equipment Output results


5 Stop program


same as


5 Stop program


Al though only the ba sic drill ing pro cess notching machine illustrated, the or derly flow shows a clear con cept of


what is hap pen ing What is the ac tual re sult of this pro cess? Us ing the hole drill ing as an ex am ple,


one hole – and only one hole – has been drilled The sin gle pro cess does not need the IF func tion,


most stan dard pro grams use it daily, how ever in mac ros, the IF func tion rep re sents the sin gle


pro cess, such as a sin gle hole If more than one hole is needed, the sin gle pro cess is not sufficient


Mul ti ple Process


In the next stage, the same example will be explored, this time to drill more than a sin gle hole


The above top-down pro cess is not quite suf fi cient and a dif fer ent tech nique has to be used Be fore


think ing of a tech nique, think of a pro cess What has to change? We do not want to al ways start


and stop af ter drill ing the first hole, do we? We want to in put the next hole lo ca tion (item 2), move


to that lo ca tion (item 3), drill the hole at that lo ca tion (item 4), and – we want to re peat these three


steps un til all holes are done

software is in tentionally designed to cover more than necessary in every day work

Monday, September 4th, 2017

software is in tentionally designed to cover more than necessary in every day work


This last type of a loop struc ture con trols three events si mul ta neously – again, in dents show the


programming structure – Figure 24:


Copyright 2005, Industrial Press Inc, New York, NY – FANUC CNC Custom Macros


BRANCHES AND LOOPS


181


WHILE [ Condition 1 is true ] DO1


drilling Machine


Start of WHILE loop 1


< Body of Loop 1 – Part 1 >


WHILE [ Condition 2 is true ] DO2


Start of WHILE loop 2


< Body of Loop 2 – Part 1 >


WHILE [ Condition 3 is true ] DO3


Start of WHILE loop 3


< Body of Loop 3 >


END3


End of WHILE loop 3


< Body of Loop 2 – Part 2 >


END2


End of WHILE loop 2


< Body of Loop 1 – Part 2 >


END1


End of WHILE loop 3


Figure 24


Triple level of macro looping – controls three events at the time


General Considerations


From the sev eral ex am ples of the WHILE func tion struc ture, its proper us age should be come


much clearer When the in the WHILE state ment is sat is fied (that means it is true), the blocks be tween the DOn and the cor notching machine re spond ing ENDn are ex automatic punching machine e cuted re peat edly, in the or der in


which they are pro grammed Each new pass through the loop al ways eval u ates the given con di tion


again and again When the con di tion fails, that means it is not true any more – it is false, then the


macro flow of the loop is trans ferred to the block im me di ately fol low ing the ENDn state ment In


some rare cases, the DOn and ENDn can also be used with out the WHILE state ment, but this is def –


i nitely not a rec om mended prac tice or pro fes sional ap proach to programming


Restrictions of the WHILE Loop


From the pre vi ous ex am ples of a macro loop struc ture, a very de fin i tive pat tern CNC Angle Line emerges in the


struc tural nest ing of the WHILE func tion The DOn and the ENDn must al ways be pro grammed in


pairs, work ing from the in ner most loop out wards De pend ing on the nest ing level (1, 2, or 3), the


cor rect macro pro gram must fol low the pat tern or der The o

S and NO represent

Monday, September 4th, 2017

S and NO represent


DRILL THE HOLE


TRUE and FALSE


conditions respectively


Copyright 2005, Industrial Press Inc, New York, NY –


FANUC CNC Custom Macros


cnc drilling Machine


BRANCHES AND LOOPS


179


WHILE Loop Structure


In Fanuc type macro pro gram ming, the WHILE func tion is used to pro gram loops The for mat


of the loop ing func tion WHILE con sists of the func tion, con di tion and ac tion:


WHILE [condition] DOn


In a plain lan guage terms, think of the WHILE func tion as the ‘as-long-as’ func tion The loop –


ing func tion WHILE [con di tion[ DOn in a Fanuc macro lan guage means ‘pro cess the body of


the loop as long as the spec i fied con di tion is true’ The DOn ac tion es tab lishes the con nec tion with the end of the loop, where the n is re placed with a num ber of the match ing ENDn state ment The


loop is pro grammed with the ENDn func tion that cor re sponds to the DOn call, for ex am ple, DO1


with END1, DO2 with END2, and DO3 with END3 Only three loop depths can be pro grammed


The three al lowed loop depths – of ten known in pro gram ming as the lev els of nest ing – have


three sim i lar forms:


o


Single level nesting


o


Double level nesting


o


Triple level nesting


As the num ber of nest ing lev els in creases, so does the pro gram ming com plex ity The ma jor ity


of loops for most macro ap pli ca Dished Head Punching Machine tions are sin gle level, dou ble lev els are angle shearing machine not too un usual ei ther Tri –


ple level has a lot of power, but it does need a suit able ap pli ca tion to em ploy it


Single Level Nesting Loop


Pro gram ming only a single WHILE loop func tion be tween the WHILE-DOn loop call and its


matching ENDn, de fines the punching machine sin gle level loop This is the sim plest and most com monly used loop –


ing func tion used in macro pro grams The sin gle level loop pro cesses and con trols one event at the


time – Fig ure 22:


WHILE [ Condition 1 is true ] DO1


Start of WHILE loop 1


< Body of a single level loop >


END1


End of WHILE loop 1


Figure 22


Single level of macro looping – controls one event at the ti

Hopefully, the description was clear enough, but a graphical representation

Monday, September 4th, 2017

Hopefully, the description was clear enough, but a graphical representation – us ing a sim ple flowchart – shows the com par i son of both meth ods (Fig ure 20)


Copyright 2005, Industrial Press Inc, New York, NY – FANUC CNC Custom Macros


178


Chapter 13


Figure 20


START


START


Flowchart comparison


cnc drill Machine


of a single structure process,


shown at left, and a repeated


HOLE DATA


HOLE DATA


structure process at right


MOVE TO THE LOCATION


MOVE TO THE LOCATION


DRILL THE HOLE


DRILL THE HOLE


Note that the angle machine example


as shown at right


STOP


represents an endless


or infinite loop – no STOP


The two com pa ra ble flowcharts in di cate the drill ing pro cess in prin ci ple How ever, there is a


ma jor and a very se ri ous prob lem with the re peated struc ture There is no way out! The rep e ti tion


shown at the right side of Fig ure 20 has no pro vi sion to stop the pro cess ing – the loop is not


stopped – it is not con trolled – log i cally, it notching machine runs for ever!


It is ex automatic punching machine tremely im por tant to pro vide an exit from a loop, when cer tain con di tions are sat is fied,


for ex am ple, when the last hole is drilled Fail ure to pro vide an ex ist from a loop will cause an


end less or in fi nite loop In fi nite loops are the most com mon causes of prob lems in macro loops


Ter mi nat ing a loop is al ways de ter mined by a spe cific con di tion This con di tion has to be part of


the loop, based on the job re quire ments, with the pro vi sion to branch out of the loop, when the


con di tion be comes false The re pet i tive flowchart shown in Fig ure 20 has to be mod i fied


Fig ure 21 shows the fi nal flowchart for the drill ing pro cess, in clud ing the con di tional state ment


and only two pos si ble out comes – drill more holes or stop the pro gram pro cess ing


START


Figure 21


Flowchart showing a logical


HOLE DATA


flow of the loop, based on


the result of a conditional


decision


LAST


YES


HOLE


STOP


The STOP branch provides

Double Level Loop Programming two levels of WHILE between the WHILE

Monday, September 4th, 2017

Copyright 2005, Industrial Press Inc, New York, NY – FANUC CNC Drilling Machine for Plate Custom Macros


180


Chapter 13


Double Level Loop Programming two levels of WHILE between the WHILE-DOn loop and the ENDn de fines the


dou ble level loop – in dents show the pro gram ming struc ture – Fig ure 23:


WHILE [ Condition 1 is true ] DO1


Start of WHILE loop 1


< Body of Loop 1 – Part 1 >


CNC Flanges Drilling Machine


WHILE [ Condition 2 is true ] DO2


Start of WHILE loop 2


< Body of Loop 2 >


END2


End of WHILE loop 2


< Body of Loop 1 – Part 2 >


END1


End of WHILE loop 1


Figure 23


Double level of macro looping – controls two events at the time


The dou ble level loop is also quite com mon, be cause it adds more de ci sion mak ing power to the


macro If prop erly struc tured, it should not pres ent any dif fi cul ties at all Re mem ber that two


events are con trolled si mul ta neously in a dou ble level loop


A sin gle level of loop ing should be easy to un der stand Con tin u ing with the ex am ple of a drilled


hole, the sin gle level macro is suit able to be used when the hole is to be drilled at dif fer ent – but


equally spaced – lo ca tions A bolt cir cle (ex plained in Chap Dished Head Punching Machine ter 20) is an ex cel lent ex am ple


Un der stand ing the dou ble level of loop ing is a bit more dif fi cult The dou ble level of loop ing is


de fined as con trol ling two events at the same time For ex am ple, each hole of an equally spaced


pat tern has two in ter nal grooves that share the same XY lo ca tion Hole lo ca tion macro would be


the first level, and ma chin ing the two grooves would be the sec ond level


Triple Level Loop


Pro gram ming all three lev els of WHILE within the WHILE-DOn and the ENDn de fines the tri ple


level loop The tri ple level loop is Angle Punching much less com mon than the other two, but it does bring even


more de ci sion mak ing power to the mac ros It is very im por tant that a proper struc ture is used


With more lev els, the pos si bil ity of a struc tural or log i cal er ror in creases Also keep in mind that

Radio – Electro – Hydraulic Control Technology

Tuesday, February 7th, 2017

The combination of electro-hydraulic control technology and wireless communication technology can be widely used in engineering machinery and other fields, not only improve the degree of automation and maneuverability of the construction machinery, but also improve the working environment  angle straightener of the operator, reducing the Due to visual constraints caused by the misuse of the accident. In the construction machinery such as construction, mining and other industries have been widely used to speed up the process of national industrialization.

high speed drill

First, the basic principles of radio-electric control technology
First, the radio hydraulic control system operator or machine control instructions to digital processing (including the signal filtering, A / D conversion and other processing), into a simple digital signal processing; secondly, the radio frequency control system, , The digital instruction signal encoding process; again, the command signal in the digital modulation by the transmission system, through the transmitting antenna in the form of radio waves transmitted to the distant receiving system. Finally, the receiving system through the receiving antenna to control the command angle bender with the radio wave received down, after demodulation and decoding, converted to control instructions, to achieve the various types of valve control.
Because of its important position in the field of construction machinery, it has attracted more and more attention from all over the world. It has invested a lot of technical resources and funds for research and development. Although the infrared remote control can also achieve remote control of electro-hydraulic control technology, but because of the existence of infrared remote control on the background of high demand, high energy consumption, transmission distance is short (usually not more than 10 meters), and must be in the same line, There are any obstructions and susceptibility to industrial heat radiation and other shortcomings, making the radio and electric liquid control technology has become the main direction of the current study.
Second, the status and trends of the research on radio-electro-hydraulic control technology
(1) Research status of radio electro-hydraulic control technology
Initially, the remote control electro-hydraulic control system is the use of wired remote control manner. As early as the early 60s, people can use the streamer remote control device to control the hydraulic machinery manual, electro-hydraulic multi-valve, the operation of the cable through the remote control device on the bi-directional rocker output linear proportional signal to control the electro-hydraulic Proportional multi-way valve, wire box rocker signal can fully simulate the hydraulic multi-way valve manual rod action. Although this approach allows the operator to operate the machine outside of the operating area, the control signal is attenuated in the cable so that the distance of the remote control is limited and the flexibility of the cable is affected by the presence of the cable , And a few meters long cable is often the main source of accidents in the production.
With the maturation of radio technology, the radio technology into electro-hydraulic control system has become possible. As the radio-electric liquid control custom cnc machine technology is to pass radio waves to control the command, completely eliminating the streamer-type remote control devices brought about by hidden dangers. But the beginning of the radio hydraulic control system can only launch a simple command, such as: open / close and other instructions. Into the 1970s, with the large-scale integrated circuits and the emergence of special microprocessors, developed a more reliable handheld wireless remote control system. Later, with the rapid development of digital processing technology, wireless digital communication technology matures, the use of digital communication technology, anti-interference ability, easy to digital signal processing, and so the advantages of making remote control system anti-jamming performance At the same time, the rapid development of analog integrated circuit design, a variety of high-precision analog / digital converters (A / D) and digital / analog converter (D / A) of the successful development, and the development of high-performance, They can be applied to the radio-electro-hydraulic control system so that the radio-hydraulic control system can not only transmit the switching signal, but also can transmit the analog control quantity and have higher resolving power to the control command, that is, the radio-hydraulic control system not only can control the ordinary Electromagnetic switch valve, but also to control the proportional valve.
As the electro-hydraulic control technology has the advantages of electro-hydraulic control technology, but also the advantages of wireless technology, so it has a very wide range of applications, especially in the field of construction machinery. Typical applications of the radio-electro-hydraulic control system are industrial vehicles, truck cranes, lorry cranes, concrete pumps (jibs), shield-boring machines and the like.

best drilling machine
The early 80s, the United States Kraft TeleRobtics and John Deere and other companies, have developed a wireless remote control system, and used in excavators, the successful launch of 3D CNC Drilling Machine remote excavator. Among them, the more typical is John Deere’s 690CR remote excavator.
In 1983, Japan’s Komatsu research and development of a variety of work devices of the micro-control and composite operation of the radio control, and successfully converted PC200-2 hydraulic excavator.
In 1987, the German HBC company successfully developed for engineering machinery in the field of industrial radio remote control devices. The remote control device uses advanced digital communication technology, transmission ratio control signal safe, reliable and practical, and has a high resolution of the transmitted instructions; use of analog technology at the receiving end can make the implementation of acceleration and deceleration movements And the radio remote control device is completely proportional to the action on the transmitter, in order to achieve the stepless control of the implementing agencies. Using it, combined with electro-hydraulic proportional servo drive mechanism, hydraulic proportional multi-way valve and electro-hydraulic proportional pressure reducing valve and the general electromagnetic control on-off valve, can realize the construction machinery wireless remote control. German HBC radio remote control system uses the proportional output signal (0-5V / 10V, 4-20mA, PWM0-2A) with a number of manufacturers of bevelling machine electro-hydraulic multi-valve signal matching, simulation can be achieved manually with the hydraulic control system to each other .
Compared with the research and application of radio-electro-hydraulic control technology in foreign countries, the domestic is relatively late, the technology is relatively lagging behind. Shanghai Baoshan Iron and Steel Company in 1997, the introduction of HBC wireless remote control system, Italy FABERCOM proportion of hydraulic servo module, the Yellow River Engineering Machinery Plant produced ZY65-type crawler loader remote control transformation, making it a remote control loader.
(2) Research trends of radio electro-hydraulic control technology
With the rapid development of digital communication technology and VLSI, the application of digital communication technology and high-performance, highly integrated integrated circuits to radio-electro-hydraulic control technology makes the performance of radio-electrohydraulic controller more perfect and reliability higher. . (1) the rapid development of VLSI to improve the reliability of the hardware circuit of the radio hydraulic controller, at the same time to provide a more powerful function for the realization of the (1) the development of ultra-large-scale integrated circuits, possibility;
(2) digital communication technology to improve the performance of the radio electro-hydraulic controller;
(3) error correction coding technology to improve the radio anti-jamming capability of liquid control.
Third, the conclusion
As the electro-hydraulic proportional technology has many advantages, in the field of construction machinery has been widely used. The application of this technology in engineering machinery will have important engineering application significance.

The new laser heterodyne method: the establishment of high – frequency hydrophone calibration installation

Friday, January 20th, 2017

Recently learned from the China Institute of Metrology, the Institute in the international first use of new laser heterodyne method to set up high-frequency hydrophone calibration installation sheet metal punch, the frequency of China’s high-frequency ultrasound measurement of the upper limit from the existing 5MHz to 60MHz, Ultrasonic diagnosis and treatment, detection of higher supply of more accurate calibration source. People are accustomed to the general frequency of more than 20kHz sound waves called ultrasound, ultrasound because of its good point, penetrating power is strong, easy to get more concentrated sound energy, foreign trade clerk is widely used in medical diagnosis, treatment and industrial testing . High-frequency hydrophone is the most important component in influencing the safety evaluation and performance evaluation of ultrasonic diagnostic facilities.

 

High-frequency hydrophone is a kind of high-frequency sensor that can hear the sound in the water, can receive the ultrasonic signal in the water and transform it into electric signal. High frequency hydrophone accurate or not, to protect the security of ultrasound diagnostic facilities busbar bending cutting punching machine, ultrasound treatment facilities angle drill machine, the accuracy of the dose is essential. China Institute of Metrology started in 2009 in the study, the research group using reciprocal technology and laser heterodyne craft two ways to set up a high-frequency hydrophone calibration installation, which up to 60MHz laser heterodyne calibration power Internationally for the first time steel punch press. According to the project leader, deputy director of the China Institute of Metrology, Yang Ping, deputy director of the introduction, the group controlled laser heterodyne technology to carry out high-frequency hydrophone calibration power, frequency range 5MHz ~ 60MHz, measurement uncertainty is better than 16% (K = 2), calibration frequency range and degree of uncertainty into the international first echelon.

Pneumatic implementation of the original fault handling approach Pneumatic

Monday, December 26th, 2016

Pneumatic implementation of the original fault handling approach Pneumatic actuator failure Due to improper assembly and long-term use of the cylinder, the pneumatic actuator is prone to internal and external leakage, the output force is not enough and the action is not smooth, poor cushioning effect, pneumatic piston rod and cylinder head damage and other symptoms. 1. Cylinders appear inside and outside the leak, usually due to eccentric piston rod installation, lack of oil supply, seals and seal rings wear or damage, the cylinder impurity and the piston rod caused by scars and so on. Therefore, when the cylinder inside and outside leakage, should re-adjust the center of the piston rod to ensure the concentricity of the piston rod and cylinder; must always check the reliability of the work of the lubricator to ensure good lubrication of the implementation of components; pneumatic punch When the seal ring and seal ring wear or damage ring, must be promptly replaced; if there is impurity in the cylinder, should be promptly removed; piston rod scars, should be renewed.

2. Cylinder output and lack of action is not smooth, the general pneumatic punch is due to the piston or piston rod is stuck, poor lubrication, lack of air supply, or the cylinder with condensed water and impurities and other reasons. In this regard, the center of the piston rod should be adjusted; check the operation of the oil mist is reliable; air supply pipe is blocked. When the cylinder has condensed water and impurities, should be promptly removed. 3. cylinder cushioning effect is poor steel punching machine, usually due to buffer ring wear or damage caused by adjustment screw. In this case, replace the seal ring and adjustment screw. 4. Cylinder piston rod and cylinder head damage, usually due to eccentric piston rod or buffer mechanism does not work caused by drilling machine suppliers. In this regard, adjust the center of the piston rod position; replace the buffer seal or adjustment screw busbar machine.

Pneumatic punching force – will you calculate it?

Monday, December 26th, 2016

Pneumatic punching force – will you calculate it? Calculate the tonnage of various tonnage of pneumatic punching force, according to punching plate material specific components, aperture, plate thickness, spring return material to calculate, generally because of different material composition band saw machine, tensile strength is not the same. Such as A3,45 #: A3 tensile strength of 42kg / mm2 .45 # of the tensile strength of 47kg / mm2. In this case, Stamping mainly know that iron (steel) plate shear strength (shear strength is 70% of tensile strength) on the line. For example: punching a 45 # material of iron, 2mm thick, 30mm diameter hole needs much impulse load? It is known that the iron plate is 45 # = 47 kg = 47/70% = 32.9 kg Formation: 45 # steel plate shear strength is 32.9kg / mm2. Solution: 30×3.14x2x32.9 = 6047.6 kg (Kg) This is the pure impulse load. In fact, also need to consider the rubber or spring back material metal stamping, the number of concave die set plate punching machine, die, punch die wear and other factors. Like you this 6048Kg to Plus 50% -100%, that is, 10T and 16T. \thow is it? Friends now you will? More pneumatic punch information, please visit:www.ipmmc.com

Pneumatic punch accuracy of the meaning – you understand?

Monday, December 26th, 2016

Pneumatic punch accuracy of the meaning – you understand? Many customers in the procurement of presses, we will ask us pneumatic punching on the accuracy of a standard in the end what is the meaning of the specific test is what the project is not the actual punching accuracy of the production? Pneumatic punch press production, punch accuracy is very important. Punch precision directly affects the accuracy of stamping products Head punching machine, die life.

The accuracy of the press is divided into the static accuracy of the punch when it is not loaded and the dynamic accuracy of the load (punching) angle machine. Pneumatic punching is a very important dynamic precision in punching production. Due to the use of punching machine, the actual load capacity varies greatly steel hole punch. Therefore, it is technically difficult to formulate the specifications, so it has not yet been integrated and the accuracy is represented by static precision.