Early the next morning, Duan Yun came to the factory with the circuit board and plastic shell he had made.

Connecting lathe circuits is also quite a complex job.

With the design drawings in hand, Duan Yun began to connect the wiring to the machine.

Since the workshop was holding a shift meeting, the master of the maintenance team who cooperated with him did not come, Duan Yun simply rolled up his sleeves and worked alone.

Duan Yun's circuit design idea is very clear, retaining part of the circuit of the milling machine, spindle, cooling, hydraulic, axial and radial feed will now be axial feed and radial AC frequency conversion speed regulation, integrated circuit chip and drive feed two axes to change to CNC linkage. The main function of the original spindle, cooling and hydraulic circuits is to adjust the motor retention, plus two servo motors and drive circuits. Electrically control speed, steering, torque, and select motor start, stop, lock.

This simple and economical CNC system designed by Duan Yun has simple wiring, compact structure, reasonable design, accurate and reliable, good operation, and gives full play to the high reliability, strong anti-interference, and convenient debugging characteristics of PLC, especially the technical transformation scheme of PLC control two-dimensional motion, which is very suitable for the technical conditions of current domestic manufacturers.

Of course, there is still a lot of room for improvement in the current gear hobbing machine modified by Duan Yun, on the one hand, Duan Yun is currently using the cutter head of the ordinary milling machine, and if it can be replaced with a special gear hobbing tool in the future, then the processing efficiency and accuracy will be greatly improved.

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

The method used for the forming milling cutter that matches the shape of the tooth groove of the processed gear to process the tooth shape on the tooth blank is called the forming method. It can be machined with a disc cutter on a horizontal milling machine or with a finger milling cutter on a vertical milling machine.

The tooth profile of the milling gear belongs to the milling surface, so a special gear milling cutter - modular milling cutter should be used, and the modulus milling cutter can be selected according to the modulus and number of teeth of the gear. A gear milling cutter of the same modulus consists of a group of 8 numbers, and each size milling cutter is only suitable for gears with a certain number of teeth.

To complete a cogging, the workpiece must be indexed once, followed by the milling of the next cogging until the entire gear is completed. Therefore, when milling gears, the tooth blank should be sleeved on the mandrel and clamped with the indexing head chuck and the tailstock top.

Duan Yun's modified machine saves the workers from frequently adjusting the indexing head, and Duan Yun also equips the machine with an automatic loading and unloading device to realize the automation of a single machine, and the efficiency is naturally improved a lot.

However, Duan Yun's installation of so many workpiece motors and control systems is obviously not only for this efficiency improvement, but also to provide him with a lot of room for later improvement.

If Duan Yun can buy a special tool for the gear hobbing machine in China in the later stage, Duan Yun can quickly modify it into a double cutter head straight bevel gear milling machine, use two cutter teeth staggered milling cutter, and mill the left and right tooth surfaces of the same tooth groove according to the development method, the production efficiency will be improved again, and the machining accuracy will also be improved, which is very suitable for batch production.

However, when Duan Yun was connecting the line this morning, several main leaders in the factory and colleagues from the technical department also went to the workshop to start watching.

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

Although he is approaching retirement, Zhao Dongsheng still inspects various workshops every morning as usual, and he still speaks with great momentum when he holds meetings to guide work, and he doesn't see the slightest carrying.

"Secretary Zhao!"

Seeing Zhao Dongsheng coming over, Duan Yun immediately stepped forward and greeted him.

"How's the modification?" Zhao Dongsheng glanced at the modified somewhat bloated machine and asked Duan Yun.

"Now it's just a matter of connecting the circuits. Duan Yun replied with a smile.

"Is your gear hobbing machine durable?" Zhao Dongsheng frowned when he saw the bare lines and workpieces of the machine leaking outside.

Zhao Dongsheng is a person who likes to be clean and neat, although he doesn't understand the mechanical technical aspects, but seeing that the appearance of this machine is so rough, he can't help but question the performance of this machine.

"Secretary Zhao, don't look at the appearance of this machine, it's just because some workpieces are not polished and covered, and there is no problem with its practicality. Duan Yun explained.

"That's right. Zhao Dongsheng nodded when he heard this, and then asked: "Xiao Duan, I don't know much about technical things, I just want to remind you that you must pay attention to safety in this modification test, and if the machine test fails, you can do it again, but once there is an accident that causes casualties or the equipment is completely scrapped, then the matter is too big......

Zhao Dongsheng will strive for a stable word in everything, this is his style of doing things, in Zhao Dongsheng's view, Duan Yun's gear hobbing machine does not need to have much efficiency, as long as it can run stably without accidents, even if the improved efficiency is not high, he can still make a fuss about this technical transformation.

Zhao Dongsheng is not from a technical background, what he is good at is political work, Duan Yun has made a big contribution to sesame, with his mouth and the level of writing reports, he can also let Duan Yun get good honors and rewards, this is his most powerful place.

"Secretary Zhao, you're right, I'll take security measures. Duan Yun nodded when he heard this.

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

"Remember, safety first!" Zhao Dongsheng finished speaking, smiled and patted Duan Yun's shoulder, then turned around and left.

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

Although he felt that the probability of Duan Yun's successful modification of the gear hobbing machine was very low, the conversation between the two yesterday still made him curious about Duan Yun's technical transformation, so Cheng Changlin, who rarely went to the workshop, also came to the workshop early in the morning this time, wanting to see with his own eyes what tricks Duan Yun was playing this time.

"Chief Engineer Cheng is early!" Yesterday, Duan Yun called Cheng Changlin 'Uncle Cheng' at Cheng Qingyan's house, but after arriving at the unit, Duan Yun changed his position, after all, other workers in the workshop were present, so he called it so to let Cheng Changlin avoid suspicion.

"Hmm. Cheng Changlin replied expressionlessly, and then carefully observed around the machine.

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

"What are you ......" just after a careful observation for a while, Cheng Changlin saw some doorways of Duan Yun's modification plan, and said: "Your idea is a bit interesting, but your idea of refitting the indexing head has been there since the seventies, 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 indexing head, which is not uncommon, it can only be regarded as a small improvement, and the operation and maintenance are a little troublesome, prone to accidents, and are not suitable for large-scale promotion...... Also, what's going on with this circuit board in your hand?"