發(fā)動機凸輪軸新物流及中心架的改進設計

17800字 38頁

摘要
凸輪軸是整個發(fā)動機的核心部件之一，它控制著發(fā)動機各氣門進排氣的準確性，而當今的發(fā)動機的設計以及關鍵技術已經從機構的設計轉變?yōu)楦呖萍嫉木茉O計上了。隨著人們環(huán)境意識的不斷增強，人們對汽車的尾氣排放提出了更高的要求，怎樣提高燃料在發(fā)動機燃燒室的燃燒率，已經成為當前汽車攻關的主要方向。目前對凸輪軸和中心架雖然已有一定實驗與理論研究，但是仍然存在三個關鍵問題：一是中心架適應性較差，它只能加工特定的加工對象，不能很好的滿足加工多個品種的需要。二是中心架支撐塊對凸輪軸的支撐是直接頂住，摩擦非常嚴重，加大了產品加工過程當中的表面被刮傷的可能性。三是中心架在加工過程中采用彈簧來始終保持支撐塊對產品的支撐，彈簧隨產品的直徑變小不斷伸長，彈簧的彈力也會不斷的減小，即對產品的支撐力也不斷減小，使得產品的加工質量受到嚴重影響。為此，本設計研究的主要內容是對凸輪軸的加工工序以及作為輔助裝置的中心架進行一定的改進設計，以很好的解決以上問題，使發(fā)動機的產品質量和生產效率均得到顯著提高。
本設計主要研究內容及其創(chuàng)新性工作如下：
1、針對現有的凸輪軸物流和中心架存在的缺陷，根據凸輪軸和中心架工作原理，探索設計一種改進的，性價比更高的凸輪軸加工工序以及作為輔助裝置的中心架。
2、針對目前生產流程路線上存在許多諸如交叉、倒流和搬運次數過多，搬運距離太長的現象，改進凸輪軸車間布局和凸輪軸加工工藝，并重新對車間的設備方位進行調整，加以解決。
3、運用一個表面焊有YG6物質的磙子代替當前的焊塊，改目前的滑動摩擦為滾動摩擦，以達到減小摩擦力和減少工件表面刮傷的可能性問題。

關鍵詞：凸輪軸，物流，中心架，生產工藝，結構改進



The improved design for the engine camshaft’new logistics
and the center frame
Abstract
Camshaft is one of the most important parts in the engine, it controls the engine the accuracy of the valve inlet and exhaust, and today's engine design and key technology has change from the design of the institutions to the high-tech precision design.Along with the people unceasing enhancement in environmental consciousness, people on car exhaust emission is put forward higher requirements, how to increase the rate of fuel combustion in the engine combustion chamber, has become the main direction of the current automobile research.At present although for camshaft and center frame has certain experimental and theoretical research, but there are still three key problems: The first is that center frame’s adaptability is poorer, it can only be machining specific object, not very good to satisfy the needs of processing varieties.The second is that center frame’s support piece of support for the camshaft is directly to resist, friction is very serious, increased the product processing process of the possibility of surface is scratched.The third is that Center frame used in the process of machining the spring to keep support to product support, the spring with smaller diameter of the product unceasingly elongates, the decrease of the elastic spring will also constantly, the support for the product has been reduced, makes the product processing quality is severely affected.To this end, the main content of this design research is the machining process of the camshaft and as auxiliary device at the center of the frame to certain design improvements, in a very good solve the above problem, the engine of the product quality and production efficiency are improved significantly.
This design research contents and innovative work is as follows:
1. Camshaft and logistics center for the existing defects, according to the working principle of the CAM shaft and the center frame, explore the design of an improved, higher cost performance camshaft machining process as well as the center of the assist device.
2. Based on the current production process route as there are many such as cross, put back the clock and the number of handling too much, and transport distance is too long phenomenon, improve the camshaft workshop layout and camshaft processing technology, equipment of workshop and azimuth adjustment, addressed.
3. Using a stone roller surface welding with YG6 material to replace the current welding pieces, change the current sliding friction into rolling friction, in order to achieve reduce friction and reduce the possibility of surface scratch problem.
Key words： Camshaft；Logistics；Center frame ；Improved structure；Production process



目錄
第一章 緒論 1
1.1研究的目的及意義 1
1.2研究的背景 2
1.3國內外的現狀及發(fā)展 2
1.4進行可行性分析及系統(tǒng)設計方案 3
1.5中心架的分析 4
第二章 凸輪軸車間布局和凸輪軸加工工藝 5
2.1凸輪軸車間平面布局 5
2.1.1工廠的平面布置定義 5
2.1.2現場平面布置及物流初始狀態(tài)介紹 6
2.2 凸輪軸的生產工藝流程與分析 6
2.2.1凸輪軸的生產工藝（原工藝） 6
2.2.2凸輪軸的生產流程 7
2.2.3 分析 8
第三章 凸輪軸生產的改進 10
3.1.凸輪軸的車間布局改進 10
3.2.凸輪軸的生產工藝和流程的改進 10
3.2.1改造后的加工工藝： 10
3.2.2加工工藝的改進 11
3.3.3物流改進后的經濟效益 12
第四章 凸輪軸加工動作分析 14
4.1 動作分析概況 14
4.2 動作分析實例 14
4.3 改進后..