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電大數(shù)控編程技術(shù)期末復(fù)習(xí)考試試題參考資料(數(shù)控編程技術(shù)題庫及答案電大考試)

時(shí)間:2022-06-03 13:05:35 試題

  下面是范文網(wǎng)小編整理的電大數(shù)控編程技術(shù)期末復(fù)習(xí)考試試題參考資料(數(shù)控編程技術(shù)題庫及答案電大考試),供大家參閱。

電大數(shù)控編程技術(shù)期末復(fù)習(xí)考試試題參考資料(數(shù)控編程技術(shù)題庫及答案電大考試)

  電大《數(shù)控編程技術(shù)》課程 基本功能指令的編程方法 一、填空題 1、用于控制開關(guān)量的功能指令是 。

  2、T0400的含義是 。

  3、采用恒線速度控制車削帶錐度的外圓時(shí),若線速度為200米/分鐘,最高轉(zhuǎn)速限定在1300轉(zhuǎn)/分鐘,正確的編程格式為 。

  4、直線進(jìn)給率的單位為 ;

  旋轉(zhuǎn)進(jìn)給率的單位為 。

  5、只有當(dāng)機(jī)床操作面板上的“選擇停止鍵”被按下,才能生效的暫停指令是 。

  二、填空題 1、G96 S150 表示切削點(diǎn)線速度控制在( 2、程序結(jié)束,并返回到起始位置的指令是( )。

  (A)M00 (B)M01 (C)M02 (D)M30 3、下列輔助功能,用于控制換刀的指令時(shí)( )。

 ?。ˋ)M05 (B)M06 (C)M08 (D)M09 4、當(dāng)執(zhí)行M02指令時(shí),機(jī)床( )。

 ?。ˋ)進(jìn)給停止、冷卻液關(guān)閉、主軸不停 (B)主軸停止、進(jìn)給停止、冷卻液關(guān)閉,但程序可以繼續(xù)執(zhí)行 (C)主軸停止、進(jìn)給停止、冷卻液未關(guān)閉、程序返回至開始狀態(tài) (D)主軸停止、進(jìn)給停止、冷卻液關(guān)閉、程序結(jié)束 三、判斷題 1、恒線速控制的原理是當(dāng)工件的直徑越大,進(jìn)給速度越慢。( )

  2、有些車削數(shù)控系統(tǒng),選擇刀具和刀具補(bǔ)償號只用T指令;

  而銑削數(shù)控系統(tǒng),通常用T指令指定刀具,用D、H代碼指定刀具補(bǔ)償號。( )

  3、用M02和M30作為程序結(jié)束語句的效果是相同的。( )

  四、簡答題 1、指令M00和M01有什么相同點(diǎn)?區(qū)別是什么 ? 2、在M功能代碼中,與主軸相關(guān)的代碼是哪些? 3、若某一程序沒有指定T功能,該程序能夠正常使用嗎?為什么? 常用準(zhǔn)備功能指令的編程方法 一、填空題 1、用于進(jìn)行平面選擇的G代碼是 。

  2、在編寫圓弧插補(bǔ)程序時(shí),若用半徑R指定圓心位置,不能描述 。

  3、在程序中,第一次出現(xiàn)G01、G02、G03等插補(bǔ)指令時(shí),必須編寫 指令。

  4、在FANUC數(shù)控系統(tǒng)中,程序段G04 P2000 的含義是 。而G04 的含義是 。

  5、圓心坐標(biāo)I、J、K表示圓弧 到圓弧 所作矢量分別在X、Y、Z軸上的分矢量。

  二、選擇題 1、( )指令與其它三個(gè)指令不屬于同組G代碼。

 ?。ˋ)G53 (B)G54 (C)G55 (D)G56 2、在同一程序段中使用兩個(gè)同組G指令,則( )。

  (A)最后一個(gè)有效 (B)第一個(gè)有效 (C)同時(shí)有效 (D)視具體情況而定 3、FANUC系統(tǒng)中,通過中間點(diǎn)返回參考點(diǎn)指令是( )。

 ?。ˋ)G27 (B)G28 (C)G29 (D)G30 4、程序段寫為G91 G0 X100 Y0 F100時(shí)( )。

 ?。ˋ)刀具以100 mm/min的速度移動至(100,0)處 (B)刀具以機(jī)床給定的速度移動至(100,0)處 (C)刀具以100 mm/min的速度在X方向移動100 mm,Y向不動 (D)刀具以機(jī)床給定的速度在X方向移動100 mm,Y向不動 5、在G55中設(shè)置的數(shù)值是( )。

 ?。ˋ)工件坐標(biāo)系的原點(diǎn)相對機(jī)床坐標(biāo)系原點(diǎn)偏移量 (B)刀具的長度偏差值 (C)工件坐標(biāo)系的原點(diǎn) (D)工件坐標(biāo)系原點(diǎn)相對于對刀點(diǎn)的偏移量 6、數(shù)控系統(tǒng)中,( )指令在加工過程中是模態(tài)的。

 ?。ˋ)G01、F (B)G27、G28 (C)G04 (D)M02 7、在使用G54~G59指令建立工件坐標(biāo)系時(shí),就不再用( )指令。

 ?。ˋ)G90 (B)G17 (C)G49 (D)G92 三、判斷題 1、G90/G91是用于絕對/增量尺寸選擇的代碼,無論什么數(shù)控系統(tǒng),都必須用這兩個(gè)代碼進(jìn)行絕對/增量尺寸的模式轉(zhuǎn)換。( )

  2、在平面內(nèi)任意兩點(diǎn)移動,用G00與G01編程的刀具運(yùn)動軌跡相同,只是運(yùn)動速度不同。( )

  3、G00指令下的移動速度可以由F代碼改變。( )

  4、用R指定圓弧半徑大小時(shí),當(dāng)R為“-”值時(shí),說明該圓弧的圓心角小于180°。( )

  5、使用快速定位指令G00時(shí),刀具運(yùn)動軌跡可能是折線,因此,要注意防止出現(xiàn)刀具與工件干涉現(xiàn)象。( )

  四、簡答題 1、配置前置刀架和后置刀架的數(shù)控車床,加工圓弧時(shí)它的順逆方向有何區(qū)別? 2、指令G00和G01有何區(qū)別? 五、編程題 1、根據(jù)圖所示零件的輪廓尺寸,分別在G90、G91方式,用G00、G01指令按刀具軌跡(虛線為快速移動軌跡)寫出加工程序,并填入程序單中。

  S 圖 車削零件輪廓 表1程序單 N G X Z F 1 2 3 4 5 6 7 8 9 10 11 12 2、仔細(xì)閱讀下列程序,根據(jù)程序單,在坐標(biāo)網(wǎng)格中畫出刀具運(yùn)行的軌跡和零件輪廓。

  表2 試題2的程序單 N G X Z F 1 G00 X50 Z1 2 G01 Z- F160 3 Z-25 4 X75 5 Z-50 6 Z- 7 X100 Z-75 8 Z-100 9 X101 10 G00 X125 Z25 圖 坐標(biāo)網(wǎng)格 3、根據(jù)圖所示零件的輪廓尺寸,分別在G90、G91方式,用G00、G01、G02/G03指令按刀具軌跡(虛線為快速移動軌跡)寫出加工程序,并填入程序單中。

  S 圖 試題3的零件輪廓 N G X Z I K F 1 2 3 4 5 6 7 8 9 10 11 4、零件的形狀、尺寸及刀具路線如圖所示。在G90方式,用G00、G01、G02/G03指令寫出刀具運(yùn)行軌跡的NC程序,填入程序清單。

  S 圖 試題4的零件輪廓 N G X Z I K F 1 2 3 4 5 6 7 8 9 10 11 121314155、加工如圖所示零件,利用直線和圓弧插補(bǔ)指令,編寫外輪廓精加工和切槽程序。

  圖 典型車削零件 刀具補(bǔ)償指令及其編程方法 一、填空題 1、指令G41的含義是 ;

  指令G42的含義是 。

  2、刀具半徑補(bǔ)償分為 、 、 3個(gè)步驟。

  3、取消刀具半徑補(bǔ)償?shù)?種編程方式是 、 。

  4、取消刀具長度補(bǔ)償?shù)?種編程方式是 、 。

  5、在銑削加工中,采用順銑時(shí)刀具半徑補(bǔ)償為 ;

  采用逆銑時(shí)刀具半徑補(bǔ)償為 。

  二、選擇題 1、程序段G17 G01 G41 X0 Y0 D01F150中的D01的含義是( )。

  (A)刀具編號 (B)刀具補(bǔ)償偏置寄存器的編號 (C)直接指示刀具補(bǔ)償?shù)臄?shù)值 (D)刀具方位的編號 2、具有刀具半徑補(bǔ)償功能的數(shù)控系統(tǒng),可以利用刀具半徑補(bǔ)償功能,簡化編程計(jì)算;

  對于大多數(shù)數(shù)控系統(tǒng),只有在( )移動指令下,才能實(shí)現(xiàn)刀具半徑補(bǔ)償?shù)慕⒑腿∠?/p>

 ?。ˋ)G40 、G41和 G42 (B)G43、G44和G80 (C)G43、G44和G49 (D)G00或G01 3、對于FANUC系統(tǒng),( )指令不能取消長度補(bǔ)償? (A)G49 (B)G44 H00 (C)G43 H00 (D)G41 4、在下列程序段中,能夠建立刀具長度補(bǔ)償似( )的程序段。

 ?。ˋ)G01 G42X100 Y20 D01F200 (B)G02 G41X100 Y20 R50 D01 F200 (C)G01 G43X100 Z20 H01 F200 (D)G03 G42X100 Y20 R50 H01 F200 5、在數(shù)控銑削加工中,刀具補(bǔ)償功能除對刀具半徑進(jìn)行補(bǔ)償外,在用同一把刀進(jìn)行粗、精加工時(shí),還可進(jìn)行加工余量的補(bǔ)償,設(shè)刀具半徑為r,精加工時(shí)半徑方向余量為△,則最后一次粗加工走刀的半徑補(bǔ)償量為( )。

 ?。ˋ)r (B)r+△ (C)△ (D)2 r+△ 6、刀具長度補(bǔ)償值的地址用( )。

 ?。ˋ)D×× (B)H×× (C)R×× (D)J×× 7、執(zhí)行G90 G01 G44 H02 Z-50 F100(H02為2mm)程序段后,刀具的實(shí)際移動距離為( )。

 ?。ˋ)48 mm (B)52 mm (C)50 mm (D)54 mm 三、判斷題 1、對于FANUC系統(tǒng),G43與G44的刀具長度偏置補(bǔ)償方向是一致的。( )

  2、對于沒有刀具半徑補(bǔ)償功能的數(shù)控系統(tǒng),編程時(shí)不需要計(jì)算刀具中心的運(yùn)動軌跡,可按零件輪廓編程。( )

  3、輪廓銑削時(shí),刀具補(bǔ)償?shù)慕⑴c取消一定在輪廓上才能生效。( )

  四、簡答題 1、簡述刀具補(bǔ)償?shù)淖饔茫?2、刀具半徑補(bǔ)償?shù)慕⑴c取消,通常在什么移動指令下生效? 3、當(dāng)立銑刀的長度磨損后,刀具長度補(bǔ)償值取正值還是取負(fù)值? 五、編程題 1、刀具起點(diǎn)在(-40,0),法向切入(-20,0)點(diǎn),切一個(gè)f40 mm的整圓工件,并法向切出返回點(diǎn)(-40,0),刀具軌跡如圖所示。利用刀具半徑補(bǔ)償指令,編寫零件的輪廓加工程序。

  圖 輪廓銑削刀具軌跡 2、用f16的立銑刀精銑 f34mm的孔,孔深為12 mm,工件坐標(biāo)系原點(diǎn)為孔的中心與上表面的交點(diǎn)處,要求切向進(jìn)退刀和刀具半徑補(bǔ)償功能,試編寫加工程序。

  3、如圖所示。零件的左端外圓f64尺寸已加工完畢,利用刀尖圓弧半徑補(bǔ)償功能,編寫零件右端外輪廓的精加工程序。

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  R15 請您刪除一下內(nèi)容,O(∩_∩)O謝謝?。。?015年中央電大期末復(fù)習(xí)考試小抄大全,電大期末考試必備小抄,電大考試必過小抄請您刪除一下內(nèi)容,O(∩_∩)O謝謝!?。?015年中央電大期末復(fù)習(xí)考試小抄大全,電大期末考試必備小抄,電大考試必過小抄The battle for young viewers CCTV is embracing Internet culture and working with independent producers on TV shows to woo audiences under 35. Han Bing bin reports. After charming audiences with his warm smile for 14 years, China Central Television host Li Jiaming recently found himself targeted by a group of young netizens unhappy with his style. The complaints came after Li hosted the premiere of Rising Star on Oct 31. It is a singing competition show that originated in Israel. Many young netizens found his hosting style slow and boring and mocked it as “CCTV evening gala style“. They even initiated an online campaign to replace him. The 40-year-old host's reaction to the criticism was surprising. During the second episode, he jokingly called himself “the slow Jiaming“ and acted much younger, talking faster and louder. “It's like selling a product. When the customers file a complaint, you must change,“ says Li. “In the Internet age, you get feedback very quickly. These young people are so cute. When you're willing to change for them, they will quickly like you back.“ In order to win more young viewers, CCTV is relying on programs such as Rising Star to embrace Internet culture. In Rising Star, a studio audience and fans watching on television vote for their favorite singers in real time, using the instant-messaging app WeChat. Rising Star was designed to be a live broadcast, but the Chinese version isn't because of policy reasons. Still, WeChat votes by viewers at home are still a major factor in determining which contestants advance to the next round. In the show's latest episode, more than million votes were cast via WeChat. “Now the competition among entertainment shows is very fierce. Audiences have more diverse needs. CCTV needs to embrace an open attitude, interact with young audiences and blend with the Internet,“ says Lyu Yitao, director of CCTV's entertainment channel. The producer of Rising Star, Enlight Media, says the program will have “a phenomenal effect“ given CCTV's audience base nationwide. “But it comes with a challenge,“ says Zhang Hang, chief producer of the program and CEO of Enlight Media's TV business. Unlike top-ranking provincial satellite channels such as Hunan TV, which have a large base of young fans thanks to a series of phenomenally popular entertainment and reality shows, CCTV productions are usually more conservative and serious, and thus have a much older audience base. “If we were to run this program on Hunan, we may attract twice as many viewers,“ says Zhang. “But since we didn't make it there, we now have to make the best out of the given conditions. And it means we have to make certain compromises.“ When the current season of Rising Star ends, Zhang says his company will conduct an overall evaluation of the program and make adjustments for future seasons. Although audience ratings haven't lived up to Zhang's expectations, he says the program has already helped CCTV attract more young people. According to Enlight Media, the number of people ages 15 to 35 who watched the first episode of Rising Star was 76 percent higher than the usual audience for CCTV entertainment productions. In order to attract young audiences, CCTV has been working with independent production companies. As one of CCTV's closest partners, Enlight Media has produced several entertainment and reality shows for the company's channels, including the Chinese version of The Biggest Loser on CCTV's business channel and an original teenager talent show Shaonian Zhongguo-qiang (Strong Young Chinese) on CCTV1. This year CCTV also licensed EE-Media, the producer of the popular Super Girl talent shows, to produce the talk show Hi! 2014, hosted by Taiwan pop star Harlem Yu and one of China's most popular TV stars Xie Na. The show is geared toward younger audiences. Canxing Productions, which rose to fame with the success of its Voice of China series on Zhejiang TV, also produced two talent shows for CCTV. One is an original production called Songs of China, which ended up as one of CCTV's most watched programs of 2014. The State Administration of Press, Publication, Radio, Film and Television announced earlier this year that, starting in 2015, only one music talent show can be aired nationwide during prime time each season, and there can be only one program based on foreign formats each year. However, domestic media report that such policies don't apply to CCTV, meaning it will become a highly desired platform by production companies. Wang Changtian, CEO of Enlight Media, confirmed to the Shanghai Securities News that its programs scheduled to air on CCTV next year, which include at least two reality shows, won't be affected. A kung fu-themed reality show, produced by Canxing, is also reportedly scheduled to run on CCTV next year. CCTV is “very active. The level of its acceptance of new ideas is even beyond my imagination,“ says Zhang Hang. “Our cooperation with CCTV will surely continue.“ When winter comes, nothing is more relaxing than a hot spring bath. For thousands of years, natural mineral-rich hot spring baths have also been used to relieve health ailments. The water found in natural hot springs contains a variety of different minerals, and the most common one is sulfur. It has a “rotten egg“ smell but is excellent for skin. The sulfur-containing water might be just what the doctor ordered when it comes to relieving pain, stress, itchy skin, arthritis and more. Hot springs resorts are thriving as biting cold winter arrives. Here we take a look at some of the best natural hot springs China has to offer.

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