Chen Jianjun of Railway Construction Heavy Industry was elected "Huxiang Craftsman" in Hunan Province

May 06, 2024

Recently，Hunan Province celebrates“May Day”International Labor Day Conference and the Second Huxiang Craftsmen Release Ceremony Held in Changsha，Chen Jianjun, an employee of China Railway Construction Heavy Industry, was honorably elected“Huxiang craftsmen”。

Video：Huxiang craftsmen——Chen Jianjun

Chen Jianjun，Boring worker of General Manufacturing Plant of Production Support System of China Railway Construction Heavy Industry，Senior technician，Chen Jianjun Skills Master Studio、Director of Labor Model Innovation Studio，Enjoy special government allowances。He is mainly responsible for the processing of the key components of the Shield Machine.，It is the largest diameter Shield Machine in China.、The world's longest undersea high-speed rail tunnel Shield Machine、The world's largest diameter shield machine main bearing and so on.“First”“Most”The successful development of high-end equipment has made important contributions.，He has successively won the locomotive medal of the All-China Railway Federation of Trade Unions.、Technical expert of Hunan Province、Craftsmen of Hunan state-owned enterprises、Master of skills in Changsha、Model worker of Changsha Economic Development Zone、Changsha craftsmen、Honorary titles such as Top Ten Young Technical Experts of China Railway Construction。

Rigorous and realistic，Study hard

Work hard and practice craftsmanship

On April 30, the Hunan Federation of Trade Unions released the exclusive poster of Huxiang craftsmen.

Chen Jianjun takes the lead in giving full play to the spirit of craftsmen，Lead the team to overcome difficulties，Study and improve the process and method，It saves nearly 1 million yuan for enterprises every year.。He organized and implemented the gearbox, the core component of the shield machine.“Gearbox advanced processing method”，The processing efficiency of the gearbox is improved，But also ensures the machining precision of the mounting holes of the gears of the gearbox.。The main bearing of shield machine is listed in 35 items that restrict the development of China's industry.“Stuck in the neck”Key technologies，He invented a four-axis machine tool eccentric clamping workpiece processing method.，And solve that problem that the radius of the radial retain of the main bearing of the shield machine is too large.、The problem that the existing horizontal boring and milling equipment cannot carry out rotary symmetrical processing，Localization of Main Bearings of Power-assisted Shield Machine，Opening up the whole industry chain of shield machine“The last link”。

Processing method proposed by Chen Jianjun“CNC Boring and Milling Machine 3+Application of Automatic Compensation for Workpiece Zero Offset in 1-Axis Machining”In a national journal《Metal working》Published and evaluated on“Excellent author”Title。He innovated and invented the curvature gradient layered feed processing method to solve the technical problems of shell cavity processing.，Breaking the technical blockade.，And filed a patent application.。He led the team to actively participate in process improvement and innovation.，Obtained Railway Construction Heavy Industry for many times“A master of innovation”Title，More than 10 patent applications have been submitted，Three patents have been granted.，Become the pursuit of excellence of China Railway Construction Heavy Industry“Craftsman spirit”A typical representative of。

Demonstrate by yourself，Teach by example

Indefatigably pass on ingenuity

As the world's leading manufacturer of high-end underground engineering equipment，Product manufacturing of China Railway Construction Heavy Industry，There are extremely high requirements for the ability and accomplishment of skilled workers.。Chen Jianjun makes full use of Changsha City“Chen Jianjun Skills Master Studio”And China Railway Construction Corporation“Chen Jianjun Model Worker and Craftsman Talent Innovation Studio”Platform，Insist on carrying out“Mentors and apprentices”Activity，Strengthen the training of CNC technology professionals，Accumulated training of more than 100 numerical control skills backbone。

When the company introduces CNC drilling and milling machining center，He shouldered the burden of training ordinary drillers to become CNC drillers.，Opened cross-type of work、The pioneer of training without foundation。The backbone of the skills he has developed，Some of them have obtained technical experts in China's railway construction.，Some of them have won 100 excellent craftsmen in Changsha.。He himself has been evaluated many times in a row.“Excellent teachers and apprentices”“Master and Apprentice Achievement Award”。Said his disciples.，Whether it is theoretical knowledge learning、Hands-on training，Or conduct oneself in the world，The master is their model.。

Chen Jianjun is also an industry professor at Hunan Vocational College of Labor and Personnel.，Make regular trips to campus，To teach practical professional courses that are not accessible to teachers and students on campus，And combined with more than 20 years of valuable experience in front-line production to share and pass on to students“Craftsman spirit”，Encourage them to learn solid skills.，Become a skilled person、Serve the country with skills。

Face the difficulties，Keep improving，

Highlight the true qualities of craftsmen

November 2023，Chen Jianjun and other 13 railway construction workers were awarded“Changsha craftsmen”

Craftsman，With a perfect fire、A consummate skill，Witness the nobility and greatness in the ordinary。Faced with on-site production problems，Chen Jianjun never flinched，Lead the team to face difficulties。

In Gwangyang, Korea-In the process of machining the integral panel of the cutter head of the shield machine in Lishui Project，Over-thick facing panel、The margin is large、Large number of tool holders and large amount of machining、Complicated situations such as urgent construction period，Chen Jianjun did not hesitate to take over this arduous task.。He works with R & D technicians.，By optimizing the process and cutting parameter，Innovative use of manual and off-line programming complementary and improved processing methods.，Finally, the processing task was completed in only 6 days.，The efficiency has increased by nearly four times.。

At the critical moment of domestic trial production of the main bearing of the shield machine，In order to improve the clamping efficiency，He carefully designed the mother of the whole process of 9 meters of tooling.。In order to ensureOThe bottom surface of the groove is not scratched to affect the sealing and appearance quality，He pushed the use of CNC tools for chamfering and demonstrated it himself.。In the face of difficulties，Chen Jianjun always faces difficulties，Pursue excellence in work，Highlight the true qualities of craftsmen。