Countercurrent 1982

Chapter 280 Safety Measures
Early the next morning, Duan Yun came to the factory with the circuit board and plastic case he had finished.

Wiring up the lathe circuit is also a rather complicated job.

Holding the designed drawings, Duan Yun began to connect the wiring to the machine.

Since the workshop was changing shifts and holding a shift meeting, the maintenance master who cooperated with him did not come, so Duan Yun simply rolled up his sleeves and started working alone.

Duan Yun's circuit design idea is very clear, retaining part of the circuit of the milling machine, spindle, cooling, hydraulic pressure, axial and radial feed, now the axial feed and radial AC frequency conversion speed regulation, integrated circuit chip needs and drive The feed two axes are changed to numerical control linkage.The main function of the original main shaft, cooling, and hydraulic circuits is to use the drive circuit to adjust the motor retention, plus two servo motors and drive circuits.Electrically controls speed, direction, torque and selects motor start, stop, lock.

This simple and economical CNC system designed by Duan Yun has simple wiring, compact structure, reasonable design, accurate and reliable operation, and fully utilizes the characteristics of high reliability, strong anti-interference and convenient debugging of PLC. The technical transformation plan of Weiwei Sports is very suitable for the technical conditions of current domestic manufacturers.

Of course, the gear hobbing machine modified by Duan Yun still has a lot of room for improvement. On the one hand, Duan Yun still uses the cutter head of an ordinary milling machine. If he can replace it with a special gear hobbing tool in the future, then the processing efficiency and accuracy will be improved. will also increase significantly.

Since there is no dedicated gear hobbing machine head, Duan Yun's current gear hobbing machine still uses the traditional gear forming method.

The method used to process the tooth shape on the tooth blank with a form milling cutter that conforms to the shape of the tooth groove of the processed gear is called the forming method.Machining can be done with a disc cutter on a horizontal milling machine or with a finger cutter on a vertical milling machine.

The tooth shape of the milling gear belongs to the milling surface, so a special gear milling cutter-modulus milling cutter is used, and the modulus milling cutter can be selected according to the module and number of teeth of the gear.Gear milling cutters of the same module are composed of 8 numbers, and each number of milling cutters is only suitable for gears with a certain range of teeth.

To process a tooth groove to complete a tooth groove, the workpiece must be indexed once, and then the next tooth groove must be milled until the entire gear is completed.Therefore, when milling gears, the tooth blank should be placed on the mandrel, and clamped with the dividing head chuck and the top of the tailstock.

Duan Yun's modified machine saves the workers from frequently adjusting the dividing head. In addition, Duan Yun also equips the machine with an automatic loading and unloading device to realize stand-alone automation, which naturally improves the efficiency a lot.

However, Duan Yun's installation of so many workpiece motors and control systems is obviously not only for the improvement of efficiency, but also provides a lot of room for his later improvement.

If Duan Yun can buy special tools for gear hobbing machines in China in the later stage, Duan Yun can quickly convert it into a double-cutter straight bevel gear milling machine, using two interlaced milling cutters to mill the same tooth slot according to the generation method For the left and right tooth surfaces, the production efficiency will be improved again, and the machining accuracy will also be improved, which is very suitable for mass production.

However, when Duan Yun was connecting the lines this morning, several main leaders in the factory and colleagues from the technical department also came to the workshop to watch.

Secretary Zhao Dongsheng was the first to come to the workshop.

Although he is approaching retirement, Zhao Dongsheng still inspects the workshops every morning as usual, and he is still very imposing when he guides the work in meetings, and he can't see the slightest portability.

"Secretary Zhao!"

Seeing Zhao Dongsheng approaching, Duan Yun immediately stepped forward to greet him.

"How's the modification going?" Zhao Dongsheng asked Duan Yun after taking a look at the somewhat bloated machine that had been modified.

"The only thing missing is the connection of the circuit." Duan Yun replied with a smile.

"Is your gear hobbing machine durable?" Zhao Dongsheng frowned when he saw the exposed wires and workpieces of the machine.

Zhao Dongsheng is a person who likes to be clean and tidy. Although he doesn't know much about mechanical technology, seeing how rough the appearance of this machine has been modified, he can't help but doubt the performance of this machine.

"Secretary Zhao, don't look at the appearance of this machine. It's just because some workpieces have not been polished and covered. In fact, there is no problem in practical use. If it passes the test, it will look much better with the addition of a casing. .” Duan Yun explained.

"That's it." Zhao Dongsheng nodded when he heard the words, and then asked: "Xiao Duan, I don't know much about technical matters, so I just want to remind you that you must pay attention to safety during this modification test. If the machine test fails You can do it all over again, but if an accident causes casualties or the equipment is completely scrapped, it will be a big deal..."

Zhao Dongsheng will strive for stability in everything he does. This is his style of doing things. In Zhao Dongsheng's view, the gear hobbing machine made by Duan Yun does not need to be very efficient. Not high, he can still make a fuss about this technological transformation.

Zhao Dongsheng is not from a technical background, but is good at political work. Duan Yun has made a lot of contributions. With his mouth and the level of writing reports, Duan Yun can also get good honors and rewards. This is his most powerful place .

"Secretary Zhao, you are right. I will take safety measures." Duan Yun nodded upon hearing this.

In fact, Duan Yun has safety protection measures in this technical transformation plan, but the protective shell will only be installed after the circuit is installed.

"Remember, safety first!" After Zhao Dongsheng finished speaking, he patted Duan Yun on the shoulder with a smile, then turned and left.

Not long after Zhao Dongsheng left, Cheng Changlin came to the workshop.

Although Duan Yun felt that the possibility of successfully modifying the gear hobbing machine was very low, the conversation between the two of them yesterday made him curious about Duan Yun's technical transformation, so Cheng Changlin, who rarely leaves the workshop, had an unprecedented early morning. So I came to the first workshop, wanting to see for myself what kind of tricks Duan Yun is playing this time.

"Morning, Mr. Cheng!" Duan Yun called Cheng Changlin "Uncle Cheng" at Cheng Qingyan's home yesterday, but when he arrived at the unit, Duan Yun changed his title to him. After all, other workers in the workshop were present, so he called Cheng Changlin to avoid suspicion.

"En." Cheng Changlin replied blankly, and then carefully observed the machine around.

Unlike Zhao Dongsheng, Cheng Changlin is a master of technology, and he knows the structure and processing principles of various equipment in the factory.

"You are..." After observing carefully for a while, Cheng Changlin saw some ways of Duan Yun's modification plan, and said, "Your idea is a bit interesting, but your idea of ​​​​retrofitting the dividing head has been around since the 70s." , that is, one set of gears is connected to the X-axis of the milling machine, and the other set of gears is connected to the universal dividing head. Large-scale promotion... Also, what's the situation with this circuit board in your hand?"

(End of this chapter)