Innovation, the key is to play the leading role of innovation in the innovation of science and technology. We have placed at the core of the overall development of science and technology innovation Location and develop technology, branding, quality as the core competitive advantages of regional innovation, better u of the multiplier effect on economic development. To strengthen scientific and technological cooperation. Around the forest and mineral resources of the deep processing, exploitation of technical innovation to promote transfer, transformation, application and popularization of scientific and technological achievements. We should improve the system of science and technology. Thoroughly implement the Central stream of deepening the reform of science and technology programme and the province issued regulations on scientific and technological progress, promoting the region's science and technology enterpris three years action plan, optimize the allocation of scientific resources, maximum relea innovation potential of science and technology, and strive to better enterpri in ed industry and beyond, and more "new Board" listing. Sought to improve science and technology projects and administration. Strengthening science and technology innovation projects top design, and strive with national and provincial "Thirteen-Five" technology plans, actively ek national and provincial major science and technology projects, industrial projects and demonstration projects, supporting science and technology enterpris to increa scientific and technological investment in rearch and development and technology, rearch and Development Center, forming a number of te
chnologies and products with independent intellectual property rights. (Specific to the XX, we will continue to do a good job in agricultural rearch and demonstration of County agriculture Park, rural agricultural demonstration ba into full play the dual role of active counties to build cooperation with the provincial Agricultural University, introduction of advanced scientific rearch and experiments in promotion, promoting "produce, learn, rearch" development. Strengthening grass-roots agricultural technicians system construction and management to progressively increa the agricultural "nsible" quantities to build County XX County planting structure adjustment of agricultural technology-savvy experts. ), Third, we must strengthen human resources support. Talent is supporting the development of the first resource. Both the development of new industries, or corporate development requires talent as a lead. I was personnel structure characteristic of traditional forestry, professional and technical personnel more than 85% for culture, education, health and forestry personnel, pure business managers is less than 12%, with the capability of rearch and development professionals is not enough 1%, talent as a whole cultural structure of structure and low level of development
国家职业资格初级车工理论试题( A )
单位姓名
单项选择题判断题成绩得分得分得分
一.单项选择题(选择一个正确的答案,将相应的字母填入题内的括号中。每题1.5分,满分75分)
火龙果的切法1. 变换()箱外的手柄,可以使光杠得到各种不同的转速。
A. 主轴箱
B. 溜板箱
C. 交换齿轮箱
D. 进给箱
2. 主轴的旋转运动通过交换齿轮箱、进给箱、丝杠或光杠、溜板箱的传动,使
刀架作()进给运动。
A. 曲线
B. 直线
C. 圆弧
3、()的作用是把主轴旋转运动传送给进给箱。
A. 主轴箱
B. 溜板箱
C. 交换齿轮箱
4. 车床的丝杠是用()润滑的。
A. 浇油
B. 溅油
C. 油绳
D. 油脂杯
5. 车床尾座中、小滑板摇动手柄转动轴承部位,一般采用()润滑。
A. 浇油
B. 弹子油杯
C. 油绳
D. 油脂杯
6. 粗加工时,切削液应选用以冷却为主的()
A. 切削液
B. 混合液
C. 乳化液
7. 切削用量中()对刀具磨损的影响最大。
A. 切削速度
B. 进给量
C. 进给速度
D. 背吃刀量
8. 加工铸铁等脆性材料时,应选用()类硬质合金。
A. 钨钛钴
B. 钨钴
C. 钨钛
9. 刀具的前角面和基面之间的夹角是()。
A. 楔角
B.刃倾角
C.前角
10. 前角增大能使车刀()。
A.刃口锋利
B.切削锋利
C.排泄不畅
11. 选择刃倾角是应当考虑()因素的影响。
A.工件材料
B. 刀具材料
C.加工性质
12. 车外圆时,切削速度计算式中的直径D是指()直径。
A.待加工表面
B.加工表面
C. 已加工表面
13. 粗车时为了提高生产率,选用切削用量时,应首先取较大的()
Without leads, my transition would be struggling. To improve the talent mechanism. Recently, the Central Government issued a circular on opinions on deepening the reform of talent development system aimed at stimulating innovation to create the maximum of entrepreneurial activity. We to actual rearch developed implement views of implementation approach, further perfect prefectural last year introduced of 19 article talent policy, to through flexible introduced talent, and joint construction development center, and cooperation established focus laboratory, measures solution local talent short problem, implementation technology results pricing shares, and equity option incentive, and Division, award approach, guarantees talent to knowledge, and skills, and management, innovation elements participation interests distribution, in-depth implementation "students introduced engineering" and "local students return engineering", Rever the shortage situation as soon as possible. To further optimize the allocation of talent. Establishing and perfecting the talent flow system, improving horizontal and vertical mobility, promoting talent in the orderly flow of units with different properties and different areas, improve the wages, health benefits, job appraisal, pension policy, encouraging talent flows to the ba first, production line, especially tho business park, enterpri incubator ... Policy, Tai Hing talent in the whole society, love, weight, using
only wind, talent innovation create profit, honor, status, efforts to create a social media environment to encourage innovation, failure tolerated. Four to foster the market. Vibrant market, it is an important foundation for economic transformation and development. Inspire creativity is to enhance endogenous impetus for economic development. Padded short I industrial Panel, accelerating the pace of development, must be hard work on fostering market players. To activate the stock of State-owned enterpris. Through the transformation and upgrading of traditional industries, reshape the industry chain and the supply chain, more soft values. (XX, to highlight the industrial development plan, lead cultivation and created on board the enterpri, in the "Thirteen-Five" period, added on board the Enterpri 4, on the regulation of industrial enterpris reached 5. While breakthrough clean energy into industrial development, optimizing the structure of XX energy play XX water rich in resources, important clean-energy ba in Northern XX build XXX). Growth of non-public economy. Active encourages, and support and guide non--public economic development, around General Secretary pointed out that of development encountered of market of iceberg, and financing of Alpine, and transformation of volcano this "three at big mountain", developed has breakthrough of with to, and tax, and financial, support policy, to really helped really help, support Lin Gebei, and constant friends, and beyond, non-public enterpri put products do fine, and put
A. 背吃刀量
B. 进给量
C. 切削速度
14. 切断时的背吃刀量等于()。
A. 直径之半
B. 刀头宽度
C.刀头长度
15. 切断刀折断的主要原因是()。
A. 刀头宽度太宽
B. 副偏角和副后角太大
C.切削速度高
16. 麻花钻横刃太长,钻削时会使()增大。
A. 主切削力
rrb400B. 轴向力
C.径向力
17. 对于同一圆锥体来说,锥度总是()。
A. 等于斜度
B.等于斜度的两倍
C.等于斜度的一半
18. 一个工件上有多个圆锥面时,最好是采用()法车削。
A.转动小滑板
无题四首B.偏移尾座
C.靠模
D.宽刃刀切削
19. 圆锥管螺纹的锥度是()。
A. 1:20
B. 1:5
C. 1:16
20. 套类工件加工的特点是()。
A. 刀杆刚性差
B.用定尺寸刀具加工孔,不用测量
C. 不用观察孔的切削情况
D. 质量比外圆容易保证
21. 为了确保安全,在车床上锉削成形面时应()握锉刀刀柄。
A.左手
B. 右手
C.双手
22. 滚花时应选择()的切削速度。
A. 较高
B. 中等
C.较低
23. 硬质合金车刀高速车削螺纹,适应于()。
A.单件
B.特殊规格的螺纹
C.成批生产
24. 硬质合金车刀螺纹的切削速度一般取()m/min。
dearA. 30~50
B. 50~70
C. 70~90
25. 车床上的传动丝杠是()螺纹。
A.梯形
B.三角
C.矩形
26. 机床照明灯应选()V供电。
A. 220
B. 110
C. 36
D. 80
27. 为了减少刀具磨损,刀具前角应()。
A. 小些
B. 较小些
C. 大些
D. 较大些
28. 螺纹的配合精度主要是取决于螺纹中径的( )。
A. 公差
B. 偏差
C. 实际尺寸
D. 公称尺寸
29. 车通孔时,内孔车刀刀尖应装得()刀杆中心线。
开班仪式讲话稿A. 高于
B. 低于
C. 等高于
D. 都可以
30. 钻孔时的背吃刀量是麻花钻()。
A.直径尺寸B.半径尺寸C.半径的1/2
31. 车削深孔时,刀杆刚性差容易让刀,因此工件会产生()误差。
A.平行度B.垂直度C.圆柱度
32. 基本偏差代号n和p的轴与基本偏差代号为H的孔可以构成( )。
A.间隙配合B.过渡配合C.过盈配合D.过渡配合或过盈配合
33. 为了保证各主要加工表面都有足够的余量,应选择( )的面为粗基准。
A. 毛坯余量最小
B. 毛坯余量最大
C. 毛坯余量居中
D. 任意
34. 螺纹有五个基本要素,它们是()。
A.牙型、直径、螺距、旋向和旋合长度B.牙型、直径、螺距、线数和旋向
C.牙型、直径、螺距、导程和线数D.牙型、直径、螺距、线数和旋合长度
35. 普通三角形螺纹中径计算公式是( )
A. d2=d-P B.d2=d-0.5P C.d2 =d-0.6495P
36. 为了确保安全,在车床上锉削成形面时应()握锉刀刀柄。dota2饰品交易
A. 左手
B.右手
C. 双手
37. 标准公差共分( )等级。
A. 12
B. 20
C. 18
38. 车床用的三爪自定心卡盘、四爪单动卡盘属于( )的夹具.
A. 通用
B.专用
C.组合
39. ( )的功能是在车床停止过程中是主轴迅速停止制动.
A. 变速机构
B.电动机
C. 制动装置
40. 车普通螺纹,车刀的刀尖角应等于()度。
A. 30
B. 55
C. 45
D. 60
41. 车通孔时,内孔车刀刀尖应装得()刀杆中心线。
A. 高于
B. 低于
C.等高于
D. 都可以
42. 以下不属于三爪卡盘的特点是()。
A.找正方便
B. 夹紧力大
C. 装夹效率高
D. 自动定心好
43. 三爪卡盘是车床的主要附件之一,主要特点是()。
A. 自动定心
工夫的近义词B. 自动夹紧
C. 不能自动定心
44. 生产中常用的刀具材料有()。
A. 铸钢
B. 铸铁
C.普通碳素钢
D.硬质合金钢
45. 切削运动就是工件和刀具之间的相对运动,车床主轴的转动是()。
A. 主运动
B.进给运动
C. 切削运动
46. 切削运动就是工件和刀具之间的相对运动,刀具的移动是()。
A. 主运动
B. 进给运动
C.切削运动
47. 台阶的长度尺寸可以用()来测量。
A. 量块
B. 百分表
C.钢板尺
D. 千分表
48. 精度为0.02mm的游标卡尺的原理,是将尺身上()mm等于游标50格刻
线的宽度。
A. 20
B. 50
C. 49
D. 19
49. 加工较长轴类零件,装夹刚性好的是()。
A. 两顶尖
B.一夹一顶
C. 自动定心卡盘
D. 四爪卡盘
50. 套类工件加工的特点是()。
A. 刀杆刚性差
B. 用定尺寸刀具加工孔,不用测量
C. 不用观察孔的切削情况
D. 质量比外圆容易保证
二、判断题(正确打√,不正确打×。每题1分,满分25分)
1. 开合螺母分开时,溜板箱及刀架都不会运动。()
2. 制动器的作用是在车床停机过程中,克服主轴箱中各运动件的旋转惯性,使主轴迅速停止转动。()
3. 千分尺是常用的精密量具之一,示值精度为0.01mm。( )
4. 夏季应选用粘度较高的液压油。( )
5. 机械工业中常用毫米作为长度的计量单位。()
6. 车工可以戴手套进行操作。()
7. 允许零件的尺寸变动量称为尺寸公差。( )
8. “未注尺寸公差”,表示该尺寸无公差。()
9. 凡装卸工件、更换刀具、测量加工表面以及变换速度时,必须先停车。()
10. 图样中标注的长度尺寸,没有计量单位都是毫米。()
11. 高速钢又叫锋钢、白钢,它们是高速切削的材料吗?()
12. 前角γ是车刀切削部分的主要工作角度,工件材料较软可取较大的前角,工
件材料较硬,可取较小的前角。()
13. 切削用量是指吃刀深度、走刀量和切削速度。()
14. 车削端面时由外向里进给时,切削速度逐渐变大。()
15. 同一基本尺寸的公差等级数字越大,其尺寸精度也越高。()
16. 90°车刀主要用来车削工件的外圆、端面和台阶。( )
17. 把φ60的毛坯棒料要车削成φ50时,其车削余量是10mm。单边余量是5mm。
(
)
18. 刀具、量具可以放在车床的导轨面上。()
过年是几月几号19. 车削零件时,一般都是粗车、半精车和精车三个阶段。()
20. 车工可以戴手套进行操作。()
21. 相邻两牙在中径线上的距离叫螺距。()
22. 圆柱度公差、同轴度公差及圆度公差都属于形状公差。()
23. 切削深度等于待加工表面直径减去已加工表面直径。()
24. 万能角度尺只是测量工件角度的一种角度量具。()
25. 精车时,刃倾角应取负值。()