In recent years, digital and intelligent construction machinery and equipment have achieved great results on the basis of early-stage innovative research and development. A batch of intelligent construction machinery with functions such as auxiliary operations, fleet management, special operations, remote control, and life cycle management has been practically applied. , It solves some difficult problems in construction well. Especially in the manufacturing of core parts of construction machinery, due to the continuous improvement of design, manufacturing, testing, and inspection capabilities and levels, the efficiency has been greatly improved, and new breakthroughs and progress have been made in realizing import substitution.
On August 7, the 2020 Construction Machinery and Key Parts Manufacturing Technology Online Forum hosted by the Metalworking Magazine was successfully held in the Beijing Machinery Studio. With the theme of "innovation, smart manufacturing, green", this forum invited industry leaders such as Su Zimeng, executive vice president and secretary-general of China Construction Machinery Industry Association, and Yang Xiaodong, vice president of Beijing Huade Hydraulic Industry Group Co., Ltd. Research Institute. Business experts, as well as corporate representatives such as Danobat, SCHUNK, Walter, Arnold, Siemens, etc. attended this online forum and gave wonderful reports. At the same time, Zheng Jinchuan, deputy chief engineer of Beijing Institute of Machinery Industry Automation, was invited as a guest studio for interactive exchanges.
This forum adopted an online live broadcast, and off-site guests and audience interacted with the forum site through video connections. The forum was broadcast simultaneously on Kyushu Cloud Broadcasting, Metalworking Online, Metalworking Knowledge Service Platform (APP), and new media platforms such as WeChat, Weibo, and Toutiao of Metalworking Magazine. So far, this forum has attracted 21,000 people to watch. For details, please see the report below.
Industry leaders and expert reports
Analysis of market operation and product technology development in construction machinery industry
Executive Vice President and Secretary General of China Construction Machinery Industry Association
Su Zimeng
Secretary-General Su shared the current overall development status of the construction machinery industry from three aspects: industry operation analysis, future industry market trends, and industry product technology development thinking.
Comprehensive analysis shows that the cumulative sales growth of 8.13% of the 12 complete machine products included in the association's statistics from January to May is a reasonable level. The sales in the first quarter were much lower than expected, and the sales in the second quarter compensated for the gap between sales in the first quarter and expected. The overall situation in the second quarter was better than that in the first quarter, and the sales in the first half of the year will show a trend of low and high. The 25 excavator companies included in the statistics in June 2020 sold a total of 24,625 excavators of various types, a year-on-year increase of 62.9%. From January to June 2020, a total of 170,425 excavators were sold, a year-on-year increase of 24.2%; of which, 155,893 were domestic, a year-on-year increase of 24.8%, and 14,532 were exported, a year-on-year increase of 17.8%.
Looking forward to 2020, it is expected that the domestic construction machinery market demand will grow steadily. Judging from the current situation, this year's construction machinery exports will show greater pressure, and it will be more difficult to maintain growth. It is expected that the construction machinery market demand will maintain steady development in 2021, and the new and updated market demand will work together.
Intelligent manufacturing of high-end hydraulic components for construction machinery
Vice President of Research Institute of Beijing Huade Hydraulic Industry Group Co., Ltd.
Yang Xiaodong
As one of the core components of construction machinery, hydraulic components have attracted much attention from the industry for their manufacturing technology and development. Dean Yang introduced the application and typical technology of high-end hydraulic components of construction machinery as a whole, such as the overall solution of hydraulic system related to cranes, shield machines, excavators, coal drilling rigs and other fields. Share the current industry's most concerned about high-end engineering machinery pumps, motor accessories, multi-way valves, pilot valves, main valves and other related manufacturing technologies. Taking the high-end multi-way valve as an example, it focuses on its development overview, structural composition, as well as the complex flow channel integrated valve body rapid deburring technology and rapid cleaning technology, integrated multi-way valve honing technology, and elongated holes. Key technologies such as processing and testing of precision parts, as well as intelligent manufacturing such as pilot valve and main valve intelligent assembly line and automatic test technology. Finally, Dean Yang also analyzed the intelligent trend of high-end hydraulic component manufacturing and briefly introduced the intelligent manufacturing plan of Huade Hydraulics.
Enterprise Special Report
Automated grinding solution for hydraulic components
Danobat Grinding Machine Sales Manager
Deng Jiyong
Solarus boring and milling machining center construction machinery industry structural parts solutions
Solarus Boring and Milling Machine Sales Manager
Meng Yafeng
First of all, Manager Deng mainly introduced the solutions of Danobat internal and external cylindrical grinder, centerless grinder, and heavy internal and external cylindrical grinder. Focus on sharing the high-speed cylindrical grinding machine LG (combined with CBN traditional abrasive grinding or high-speed diamond grinding, using the B-axis and a wide range of wheel headstock options of the electric spindle, so that multiple operations can be performed in a single setting. Suitable for external, Surface, taper, overall shape, peeling and internal grinding of external circles), internal and arc grinding machines OVERBECK (modular machine design to achieve the simplest grinding to highly complex grinding tasks on one device, each device The expansion can be applied to automation applications), high-efficiency centerless grinding ESTARTA-400/650 (the machine has good rigidity, can keep high-precision machine components to a minimum under the harshest conditions, can achieve the best reliability, and can achieve full CNC unmanned On-duty grinding and closed-loop post-processing measurement), and advanced grinding technology and equipment such as HG heavy-duty internal and external cylindrical grinding machine solutions.
Secondly, Manager Meng introduced the standard model for basic processing and the combined multi-station system; the head-to-head boring and milling machine tool and the advanced solution combined with the multi-station system; and the single machine + pallet system, the head boring and milling machine + pallet system, and the head Different forms of automated production lines such as boring and milling machine tools + pallet system + shared tool magazines have further shared typical industrial application cases of automated production lines and tool management cases. In addition, advanced tooling and technology such as key supporting fixtures and milling heads were introduced.
Flexible clamping technology solutions for construction machinery
SCHUNK clamping technology product manager
Cai Yongjie
Manager Cai focused on the clamping application cases of cantilever, hydraulic valve body and frame structure, shared the experience of optimizing the clamping scheme of hydraulic valve body, and showed related SCHUNK products. When clamping large blanks, the traditional clamp has a large interference surface, which is inconvenient to feed and the parts that can be processed are relatively limited. After using the zero-point quick-change system, the fixture form is more concise, which can realize "one-side clamping and five-side processing", which expands the working space.
When processing large structural parts of construction machinery, due to the long alignment time, there is a problem of vacant machine tools. SCHUNK’s rapid fixture change-over technology and scheme can reduce the waiting and downtime of the machine tool, and take advantage of the high repeatability of zero-point quick change. Set up the alignment station to increase the utilization rate of the machine tool, thereby increasing the production efficiency.
For the batch processing of small structural parts, SCHUNK provides a multi-station vise KSM2 fixture solution. Through the wedge structure, the movable jaws can be changed or positioned arbitrarily, which has high flexibility and can process multiple workpieces at a time to better guarantee Consistency of workpiece processing quality. When clamping semi-finished or finished workpieces, the SCHUNK CNC precision vise KSG can adjust the clamping range without using other tools. The electro-permanent magnetic chuck is very flexible to use, does not require additional parts, has high precision and is widely used, and is suitable for application scenarios such as train rail processing.
High-efficiency tool solutions for hole machining of hydraulic parts of construction machinery
Walter Application and Industry Development Manager
Du Yiwei
Manager Du introduced in detail the complete tool solutions for drilling and thread processing of hydraulic parts of construction machinery. Through multiple practical application videos, they comprehensively demonstrated the performance of Walter's related products in different processing scenarios.
Aiming at the difficulties of deep hole drilling, Walter has launched an efficient deep hole drilling product-DC170 series carbide drills, which adopt a wrap-around ligament design to provide better head support and more adequate head support during the drilling process. Coolant storage space, reliable process, longer tool life, higher hole quality and lower production cost. The DC170 product series is comprehensive and widely used. It can drill deep holes from 3 times the diameter to 30 times the diameter and has good processing performance.
For thread processing, Walter's recently launched TC115 and TC216 enhanced general-purpose taps are economical and versatile. Steel parts, ductile iron and aluminum alloys can be processed. Among them, the TC115 blind hole tap has a low manufacturing cost and has a 45° helix angle, which is suitable for processing threads with a depth of 3 times the diameter. TC216 is a through hole tap with a front chip removal design on the head.
In addition, Manager Du also introduced the synchronous tapping tool holder AB735 with micro-compensation capability, blade thread milling cutters T2711, T2712 and T2713 suitable for processing large diameter threads, as well as thread tools and thread processing methods used in pipe thread processing Wait.
Engineering machinery processing technology
Chairman Arnold
Koas
Mr. Ke mentioned in the report that construction machinery has a wide range of uses. Its core electro-hydraulic servo control system and internal combustion engine power system have complex processing techniques, and require high tool structure and accuracy. Mr. Ke gave a further introduction on the valve block processing of the electro-hydraulic servo control system and the electronic control injector parts of the internal combustion engine power system.
When the valve block is processed, there are many steps, forming surfaces and intersecting holes, which have strict requirements for dimensional accuracy, high requirements for hole surface roughness and coaxiality, and large processing difficulty coefficients. Based on specific processing cases, Mr. Ke analyzed the key points of the valve block forming hole processing, and gave corresponding drill bit models that can meet the specified requirements for different processing scenarios, and the person in charge of Arnold R&D center demonstrated the on-site tool processing conditions . Next, Mr. Ke explained the machining cases of electronically controlled injector parts, shared the optimization results of drill bits suitable for different machine tools in view of actual machining problems, listed relevant parameters for comparison, and summarized the machining advantages of specific tools.
Engineering machinery solutions based on Siemens Solid Edge
Senior Solution Consultant of Siemens Industrial Software
Jia Zhongwen
Consultant Jia pointed out that the rapid development of construction machinery puts forward higher requirements on the reliability, accuracy and repeatability of equipment, and the rapid customization of standard product series according to customer requirements has become a design trend. In order to meet the needs of customers at different stages in the entire R&D process, Siemens provides corresponding solutions.
Siemens Solid Edge software can be used to produce realistic images, quickly and easily create rich 3D product information, visualize products, and allow customers to understand and inspect products intuitively and clearly. Solid Edge is also suitable for process management and conceptual design, which can accurately assess costs and the time from order to delivery before sales, reducing business risks. Solid Edge PARTcommunity is used for "non-customized" supplier component selection. It can select the preferred configuration based on experience and standards, and minimize the development cost of customized products. Solid Edge's synchronization technology can be used to quickly draw drawings and achieve two-dimensional and three-dimensional integration to complete better designs. This function of the software makes it easier to eliminate design errors before manufacturing, shorten design time, speed up design progress, improve modification speed and reuse rate, and make delivery faster and more profitable. Solid Edge can also be used for electrical wiring design and drawing, integrating 2D electrical schematics and PCB into 3D design, making cables of the correct length, and accurately predicting system performance. In addition, the software's simulation function can also be used for structural analysis. As a tool for steel structure design and detail description, it also has outstanding advantages in the design and development of sheet metal parts.
In recent years, the overall development quality of China's construction machinery industry has steadily improved, and various indicators such as economic benefits, labor productivity, R&D investment intensity, digital and intelligent achievements, and green development have been significantly improved. With the development of the western region and the construction of the Belt and Road Initiative, in the future, the pace of infrastructure construction will not stop, and construction machinery will still be indispensable. It is expected that relevant companies will develop smart tools, software, equipment, production lines, etc. that are helpful to production, further highlight the advantages of serialization and complete sets of construction machinery products, and better provide equipment guarantee for national economic construction.
