On the basis of the CAK6150 ordinary CNC lathes, the corresponding technical innovations were made, namely CAK6150P CNC lathes. The bottleneck and difficulties encountered in the processing of the rope core drill pipe joint thread are described here. At the same time, the corresponding parameters of the technical transformation are compared with those before the transformation, and the feasibility is analyzed, and the technical transformation is proposed. The program, as well as the mechanical and electrical parameters, interface issues, etc. are explained. The test proves that it has strong reliability and significant economic benefits.
Keywords: Drill pipe threading; CNC lathes; Retrofitting Currently, with the advancement of geological exploration and exploration needs, the production volume and demand for exploration equipment are showing a rising trend. The local mining bureaus have to meet the development needs to meet the exploration work. Needs, have carried out the corresponding equipment product research and development work to varying degrees, especially the drill pipe thread processing and the research and development manifests the integrated value which integrates the research and development, the production and the sale together. In view of this processing technology must rely on the objectivity of CNC lathes, it is necessary to explore the optimization of many CNC lathes.
1 Drill pipe threading problems and causes 1.1 Problems The rope core drill pipe has been drilled in the field and the depth of drilling has reached 2010.26 meters. Therefore, the market is in short supply. For the drilling of the drill pipe, there is currently a special CNC pipe thread lathe, but the cost of processing the thread of the lathe is high and it is not affordable, and it is difficult to popularize. For many units, its high price is a big obstacle. In this way, how to use the current common CNC lathes to process high-strength, high-quality rope core drill pipe joint threads has become the focus of research. However, according to statistics, ordinary CNC lathes cannot guarantee thread quality standards. For example: 1 Because the drill pipe joints are mostly made of alloy materials and have a hard texture, it is very difficult to reprocess the steel after it has been tempered; 2 because the thread pitch is large, Moreover, the finish is relatively low, and there are obvious chatter marks. Therefore, it is very difficult to achieve good results with a forming knife. 3 Because the precision of the processing is not enough, the sealing performance of the thread may be poor, and the effect of the sealing test of the thread is directly affected. ;4 In the finishing stage of thread processing, the pitch is smaller than the original one, which causes errors for practical applications and affects the practical application effect.
1.2 Reasons The above problems are mainly caused by the material and the CNC lathe setting.
1) The material material problem is as described above: 1 The alloy material of the drill rod joint is harder, so it adds a difficult factor for processing; 2 The thread pitch reaches 8mm, the cutting force with the forming knife is large, and the thread cannot be guaranteed. Smoothness and precision; 3CAK6150P ordinary CNC lathe toolholder uses AK3080×6 six-station horizontal CNC tool holder, insufficient strength; 4 the tail pitch becomes smaller, which is related to the dynamic nature of the CNC system and servo mechanism, so the CAK6163 CNC lathe should be used. instead.
2) CNC lathe setting problems The corresponding settings of CAK6150P CNC lathe are as follows: 1 The operating system adopts Omori III III CNC system; 2X axis servo motor is: SGMG-05AAB0.45kw4P1500r/min; 3Z axis servo motor is: SGMG-09/13AAB0.85 / 1.3kW4P1500r/min; 4 tool holder adopts AK3080 × 6 six-station horizontal CNC tool holder produced by Yantai, Shandong, speed is lO00r/min; 5 spindle motor is YD132M-4/2P8/6.8kw two-speed motor.
2 Selection and Application of Retrofit Schemes for CNC Lathes In view of the above problems, they must be reconstructed in a timely manner to make up for their technical and economic needs. For this purpose, the transformation plan for CNC lathes needs to be determined first, and the precautions for each transformation section must be clarified. . The test object is the CAK6152 CNC lathe processing joint thread. The transformation of various components of the technical transformation program CAK6152P, related electrical measures, and transformation value analysis are as follows.
2.1 Determination of the modified part of the CAK6152P and precautions 1) By using the CAK6152 CNC lathe to process the thread, the chatter marks of the thread can be effectively eliminated, and the smoothness of the thread can be significantly improved. It can be seen that the bed of the CAK6152P not only satisfies its requirement for strength, but also saves The support cost for large lathes.
2) On this basis, the use of AK3080 × 6 horizontal CNC tool holder, it is found that its strength is not enough, for this, it is replaced by LDB-120, 6163 vertical CNC tool holder, found that the vibration pattern disappears, the strength also meets the requirements, It is worth mentioning that we should pay attention to replace the LDB-120, 6163 vertical CNC tool post, its interface with the original AK3080 × 6 horizontal CNC tool holder to be effectively connected, its main performance is how to arrange the excess tool bit line, How to deal with a signal line with one tool post locked in place, and the machine reads high and low levels in three aspects. The specific measures are as follows. 1 Keep the parameters related to the tool holder unchanged, that is, keep the six stations of the ladder diagram; 2 Because the system only recognizes 1-4 positions, it is always high for the redundant two tool station signal lines. Because the low level is effective, so keep both in an invalid state; 3 Omori-III system provides that the in-position signal is active high, so it should always be kept high, that is, it is always in a valid state, and LDB-120,6163 vertical CNC tool holder is locked, so no need to re-confirm the signal; 4 according to the CAK6150P electrical diagram tool holder T code can be seen high level of locking signal can be directly connected to the positive power supply, can be in the power supply A resistor R is connected in parallel between the positive electrode and the signal line, and the result shows that R is between 151O and 22OO at 24V; when the power supply is at 12V, the resistance R is between 620 and 15OO, and 0.5 W. When the connection between the Hall element and the machine PLC is active low, the wiring is shown in the figure below.
3) The spindle center of the CAK615OP CNC lathe is high, so as long as the LDB4-120, 6163 tool holder height is appropriate, no backing plate is required. In addition, the height of the modified CAK6152P sliding table has been measured to be 230 mm, so the bottom surface can only use the 200×200 6163 lathe NC tool holder instead of the 240×240 6163A CNC tool holder.
4) The unmodified CAK6152 CNC lathe uses the FANUC-0i-mate system. The CAK6152P retrofit program does not need to be replaced because the thread tailing problem in the system has nothing to do with the CNC system. This problem can be selected through investigation and consultation. The thread instructions are resolved. In addition, in the application process, when the tool holder is installed, it is only necessary to punch according to the size, and then the bolt can be used for fixing. Of course, in order to maintain the stability of the device, glue must be used for the bolt.
2.2 Corresponding electrical adjustment measures 1) According to the manual contents of Omori IIII, the parameters 7100.0 and 7100.1 related to the tool holder station are to be converted into four or six stations; at the same time, through the electrical schematic diagram of the CAK6150P CNC lathe, the tool holder in the ladder diagram will be The seven codes of 1002.1-1002.7 also perform four-six-station conversions. 2) The electrical configuration of the AK3080×6 horizontal CNC tool holder manufactured by Yantai Universal Co., Ltd. is as follows: 1 24V DC power is used for the tool holder power; 2) the effective output of the work position Hall element is low; 3 Toolholder contains the toolholder Lines, positive lines, motor lines, and power lines total 13. The LDB-120,6163 vertical CNC tool post power supply for CAK6150P CNC lathes after conversion is 24V DC (compatible); there are 10 toolholder bit lines, motor wires and power cords (not compatible). Reduced 3 lines compared to the pre-retrofit.
2.3 Analysis of Economic Advantages of Transformation 2.3.1 Economic Advantages Through the transformation of CAK6152 CNC lathes, this will not only save a lot of money for the purchase of equipment, but also greatly improve the exploration and development capabilities of technical practices. It is reliable, effective, and the processed thread of the drill pipe not only disappears from the chatter marks, but also achieves the standard of precision and production efficiency. Moreover, this kind of technical transformation of ordinary CNC lathes has a good high-strength rope core drill pipe production capacity, not only significantly increased the production capacity, but also has a greater economic value.
2.3.2 Precautions:
As mentioned above, after the transformation of the CAK6152 CNC lathe, that is, the alteration of the CAK6152P numerical control lathe, the amount of change is relatively small, and the relatively complicated FANUC-0i-mate system does not need to be changed, not only effectively solving the production of the drill pipe thread. The amount of processing, but also in the quality of the acceptance of testing equipment, can be described as a multi-purpose, the most cost-effective transformation program. Of course, in the specific transformation process, the following issues need to pay attention: 1 When wiring, firstly measure the level value of the valid signal and the invalid signal to improve the follow-up wiring method and improve the reference; 2 should pay attention to the short-circuit fault, ie The high level of the bit signal must not be directly connected to the positive pole of the power supply; 3 The output wiring of the Hall element should be the same as the PLC input wiring mode; 4 When the tool holder is installed, the tool holder and the machine number must be one to one, ie 1 corresponds to I. , 3 corresponds to III, 5 corresponds to V to prevent machining errors.
3 Summary This article through the general CAK6152 CNC lathe related technology research, as well as the production of drill pipe threading encountered bottlenecks and difficulties, some of its parameters and components were reconstructed, and specific transformation techniques and precautions were analyzed. Through experiments and workshop practice, this program can effectively improve the efficiency of drilling rod threading. It can be seen that the CAK6152P CNC lathe optimization program established on the basis of the CAK6152 CNC lathe not only broke through the technical bottleneck of the CAK6152 CNC lathe thread machining, but also greatly reduced the production costs, in order to change the market for high-strength ropes The situation in which the supply of core drill pipe exceeds supply has laid a solid foundation, and it also provides a powerful reference for the re-optimization of CNC lathes and the creation of higher economic value.
Keywords: Drill pipe threading; CNC lathes; Retrofitting Currently, with the advancement of geological exploration and exploration needs, the production volume and demand for exploration equipment are showing a rising trend. The local mining bureaus have to meet the development needs to meet the exploration work. Needs, have carried out the corresponding equipment product research and development work to varying degrees, especially the drill pipe thread processing and the research and development manifests the integrated value which integrates the research and development, the production and the sale together. In view of this processing technology must rely on the objectivity of CNC lathes, it is necessary to explore the optimization of many CNC lathes.
1 Drill pipe threading problems and causes 1.1 Problems The rope core drill pipe has been drilled in the field and the depth of drilling has reached 2010.26 meters. Therefore, the market is in short supply. For the drilling of the drill pipe, there is currently a special CNC pipe thread lathe, but the cost of processing the thread of the lathe is high and it is not affordable, and it is difficult to popularize. For many units, its high price is a big obstacle. In this way, how to use the current common CNC lathes to process high-strength, high-quality rope core drill pipe joint threads has become the focus of research. However, according to statistics, ordinary CNC lathes cannot guarantee thread quality standards. For example: 1 Because the drill pipe joints are mostly made of alloy materials and have a hard texture, it is very difficult to reprocess the steel after it has been tempered; 2 because the thread pitch is large, Moreover, the finish is relatively low, and there are obvious chatter marks. Therefore, it is very difficult to achieve good results with a forming knife. 3 Because the precision of the processing is not enough, the sealing performance of the thread may be poor, and the effect of the sealing test of the thread is directly affected. ;4 In the finishing stage of thread processing, the pitch is smaller than the original one, which causes errors for practical applications and affects the practical application effect.
1.2 Reasons The above problems are mainly caused by the material and the CNC lathe setting.
1) The material material problem is as described above: 1 The alloy material of the drill rod joint is harder, so it adds a difficult factor for processing; 2 The thread pitch reaches 8mm, the cutting force with the forming knife is large, and the thread cannot be guaranteed. Smoothness and precision; 3CAK6150P ordinary CNC lathe toolholder uses AK3080×6 six-station horizontal CNC tool holder, insufficient strength; 4 the tail pitch becomes smaller, which is related to the dynamic nature of the CNC system and servo mechanism, so the CAK6163 CNC lathe should be used. instead.
2) CNC lathe setting problems The corresponding settings of CAK6150P CNC lathe are as follows: 1 The operating system adopts Omori III III CNC system; 2X axis servo motor is: SGMG-05AAB0.45kw4P1500r/min; 3Z axis servo motor is: SGMG-09/13AAB0.85 / 1.3kW4P1500r/min; 4 tool holder adopts AK3080 × 6 six-station horizontal CNC tool holder produced by Yantai, Shandong, speed is lO00r/min; 5 spindle motor is YD132M-4/2P8/6.8kw two-speed motor.
2 Selection and Application of Retrofit Schemes for CNC Lathes In view of the above problems, they must be reconstructed in a timely manner to make up for their technical and economic needs. For this purpose, the transformation plan for CNC lathes needs to be determined first, and the precautions for each transformation section must be clarified. . The test object is the CAK6152 CNC lathe processing joint thread. The transformation of various components of the technical transformation program CAK6152P, related electrical measures, and transformation value analysis are as follows.
2.1 Determination of the modified part of the CAK6152P and precautions 1) By using the CAK6152 CNC lathe to process the thread, the chatter marks of the thread can be effectively eliminated, and the smoothness of the thread can be significantly improved. It can be seen that the bed of the CAK6152P not only satisfies its requirement for strength, but also saves The support cost for large lathes.
2) On this basis, the use of AK3080 × 6 horizontal CNC tool holder, it is found that its strength is not enough, for this, it is replaced by LDB-120, 6163 vertical CNC tool holder, found that the vibration pattern disappears, the strength also meets the requirements, It is worth mentioning that we should pay attention to replace the LDB-120, 6163 vertical CNC tool post, its interface with the original AK3080 × 6 horizontal CNC tool holder to be effectively connected, its main performance is how to arrange the excess tool bit line, How to deal with a signal line with one tool post locked in place, and the machine reads high and low levels in three aspects. The specific measures are as follows. 1 Keep the parameters related to the tool holder unchanged, that is, keep the six stations of the ladder diagram; 2 Because the system only recognizes 1-4 positions, it is always high for the redundant two tool station signal lines. Because the low level is effective, so keep both in an invalid state; 3 Omori-III system provides that the in-position signal is active high, so it should always be kept high, that is, it is always in a valid state, and LDB-120,6163 vertical CNC tool holder is locked, so no need to re-confirm the signal; 4 according to the CAK6150P electrical diagram tool holder T code can be seen high level of locking signal can be directly connected to the positive power supply, can be in the power supply A resistor R is connected in parallel between the positive electrode and the signal line, and the result shows that R is between 151O and 22OO at 24V; when the power supply is at 12V, the resistance R is between 620 and 15OO, and 0.5 W. When the connection between the Hall element and the machine PLC is active low, the wiring is shown in the figure below.
3) The spindle center of the CAK615OP CNC lathe is high, so as long as the LDB4-120, 6163 tool holder height is appropriate, no backing plate is required. In addition, the height of the modified CAK6152P sliding table has been measured to be 230 mm, so the bottom surface can only use the 200×200 6163 lathe NC tool holder instead of the 240×240 6163A CNC tool holder.
4) The unmodified CAK6152 CNC lathe uses the FANUC-0i-mate system. The CAK6152P retrofit program does not need to be replaced because the thread tailing problem in the system has nothing to do with the CNC system. This problem can be selected through investigation and consultation. The thread instructions are resolved. In addition, in the application process, when the tool holder is installed, it is only necessary to punch according to the size, and then the bolt can be used for fixing. Of course, in order to maintain the stability of the device, glue must be used for the bolt.
2.2 Corresponding electrical adjustment measures 1) According to the manual contents of Omori IIII, the parameters 7100.0 and 7100.1 related to the tool holder station are to be converted into four or six stations; at the same time, through the electrical schematic diagram of the CAK6150P CNC lathe, the tool holder in the ladder diagram will be The seven codes of 1002.1-1002.7 also perform four-six-station conversions. 2) The electrical configuration of the AK3080×6 horizontal CNC tool holder manufactured by Yantai Universal Co., Ltd. is as follows: 1 24V DC power is used for the tool holder power; 2) the effective output of the work position Hall element is low; 3 Toolholder contains the toolholder Lines, positive lines, motor lines, and power lines total 13. The LDB-120,6163 vertical CNC tool post power supply for CAK6150P CNC lathes after conversion is 24V DC (compatible); there are 10 toolholder bit lines, motor wires and power cords (not compatible). Reduced 3 lines compared to the pre-retrofit.
2.3 Analysis of Economic Advantages of Transformation 2.3.1 Economic Advantages Through the transformation of CAK6152 CNC lathes, this will not only save a lot of money for the purchase of equipment, but also greatly improve the exploration and development capabilities of technical practices. It is reliable, effective, and the processed thread of the drill pipe not only disappears from the chatter marks, but also achieves the standard of precision and production efficiency. Moreover, this kind of technical transformation of ordinary CNC lathes has a good high-strength rope core drill pipe production capacity, not only significantly increased the production capacity, but also has a greater economic value.
2.3.2 Precautions:
As mentioned above, after the transformation of the CAK6152 CNC lathe, that is, the alteration of the CAK6152P numerical control lathe, the amount of change is relatively small, and the relatively complicated FANUC-0i-mate system does not need to be changed, not only effectively solving the production of the drill pipe thread. The amount of processing, but also in the quality of the acceptance of testing equipment, can be described as a multi-purpose, the most cost-effective transformation program. Of course, in the specific transformation process, the following issues need to pay attention: 1 When wiring, firstly measure the level value of the valid signal and the invalid signal to improve the follow-up wiring method and improve the reference; 2 should pay attention to the short-circuit fault, ie The high level of the bit signal must not be directly connected to the positive pole of the power supply; 3 The output wiring of the Hall element should be the same as the PLC input wiring mode; 4 When the tool holder is installed, the tool holder and the machine number must be one to one, ie 1 corresponds to I. , 3 corresponds to III, 5 corresponds to V to prevent machining errors.
3 Summary This article through the general CAK6152 CNC lathe related technology research, as well as the production of drill pipe threading encountered bottlenecks and difficulties, some of its parameters and components were reconstructed, and specific transformation techniques and precautions were analyzed. Through experiments and workshop practice, this program can effectively improve the efficiency of drilling rod threading. It can be seen that the CAK6152P CNC lathe optimization program established on the basis of the CAK6152 CNC lathe not only broke through the technical bottleneck of the CAK6152 CNC lathe thread machining, but also greatly reduced the production costs, in order to change the market for high-strength ropes The situation in which the supply of core drill pipe exceeds supply has laid a solid foundation, and it also provides a powerful reference for the re-optimization of CNC lathes and the creation of higher economic value.
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