外文翻譯--銑床夾具設(shè)計特點

1、Milling fixture design features First, the main types of milling machine fixture and structure of the form Milling fixture for machining parts on the main plane, groove, keyway, spline, and the gap as well as face shape. Usually as a result of milling fixture table together with the feed movement, i

2、n different ways according to the feed milling fixture can be divided into straight-line feed type, feed circular mode and rely on three types of feed-type 1. Linear feed-type milling fixture This type of milling machine with the most. Fixture installed in the milling machine table, the processing i

3、n a straight line with the feed table by way of movement. According to the workpiece quality, structure and production quantities will be designed as a one-piece fixture points more than the parallel and more than a row followed by clamping of the linkage approach, sometimes the use of sub-degree in

4、stitutions, both to improve production efficiency 2. Circle-type milling machine fixture feed Circle feed milling in the case of non-stop loading and unloading the workpiece, the general is a multi-tasking, and in the milling machine rotary table use. This fixture is compact and easy to operate, mob

5、ile time and auxiliary time overlap is high-performance milling fixture, for use in high-volume production 3. By mold milling fixture This module depends on the milling machine with a fixture used in dedicated or universal milling machines on the processing of various non-circular surface On the rol

6、e of mold is to make access to supplementary motor workpiece to form a profile campaign. Movement by way of the main feed through mode can be divided into straight-line milling machine fixture and circle into the feed to the two. Second, the design features of milling fixture As a result of milling

7、and cutting force cutting more and more intermittent cutting edge, easy processing of vibration, so they should pay attention to the design of milling machine fixture: clamping force to be sufficient self-locking and anti-stroke; fixture installation to be accurate and reliable , that is, when the p

8、rocessing installation and the proper use of directional keys on the knife device; specific folder have sufficient stiffness and stability, the structure must be reasonable As a result of milling and cutting force cutting more and more intermittent cutting edge, easy processing of vibration, so they

9、 should pay attention to the design of milling machine fixture: clamping force to be sufficient self-locking and anti-stroke; fixture installation to be accurate and reliable , that is, when the processing installation and the proper use of directional keys on the knife device; specific folder have

10、sufficient stiffness and stability, the structure must be reasonable 1 Directional keys Directional key position, also known as keys, installed on the bottom of the vertical slot fixture, generally with two, an in a straight line, the farther the distance, the higher the precision-oriented, with scr

11、ew fastening in the specific folde匚 Directional keys work with the milling machine with table-shaped slot in the machine tool fixture to determine the correct position; can absorb part of the cutting torque, reducing the load on clamping bolt to increase the stability of the fixture, so flat and som

12、e special drilling jig boring machine fixture is also frequently used Directional keys are rectangular and round two. 2. Of the knife device Devices on the knife block and knife by the side of the foot of the fixture and tool used to determine the relative position The structure of the form of a kni

13、fe depends on the shape of the surface processing Directional high-precision fixture should not be used or heavy directional keys, but in the specific folder on one elongated side processing as a base to look for is the installation location calibration fixture.Knife block on the pin and screw faste

14、ner commonly used in the specific folder, its location should be easy-to-use plug-foot on the knife, without prejudice to the workpiece loading and unloading On the knife when the knife cutter block with a plug in between the feet with the knife tool to avoid direct contact block or cause damage to

15、the knife blade block premature wear. Cypriot Cypriot feet are flat feet and two-foot cylindrical plug, the thickness and diameter of 3 5mm, manufacturing tolerance h6 Side of the knife block and feet have been standardized (the design can be found in the relevant manual), use the total fixture Seda

16、t map scale should be marked on the knife block size and the work surface and positioning the location between the components. Devices should be installed on the blade of the knife and is easy to cut one end of the workpiece 3. Folder specific design To improve the milling fixture installed in the m

17、achine tool stability, reduce its intermittent cutting may be caused by vibration, not only in the specific folder have sufficient stiffness and strength, their height and width ratio should also be appropriate, a general H / B 三 1 1.25, in order to reduce the fixture center of gravity, so that as c

18、lose as possible to the workpiece surface countertops. In addition, we must set a reasonable and ear blocks to strengthen the tendons If the folder specific wide, can be set up in the same side of two T-slot milling machine table equidistant between the ears Block; of heavy-duty milling fixtures, sp

19、ecific folders should also be set up at both ends of the rings, such as lifting holes or to carry. In the milling process, the often installed in the milling fixture table, together with the jig with the workpiece feed table for movement.In the milling process, the often installed in the milling fix

20、ture table, together with the jig with the workpiece feed table for movement. According to the workpiece feed means of general milling fixture can be divided into the following two types: 1. Linear feed-type milling fixture o In the milling process, the often installed in the milling fixture table,

21、together with the jig with the workpiece feed table for movement 2. Circle feed milling fixture.Such fixtures are commonly used in the milling machine with rotary table, the workpiece table, together with the fixture with the continuous, slow movement of the rotary feed, no parking will be loading a

22、nd unloading the workpiece According to the processing requirements of the two cutter head can also be rough at the same time, finishing Milling is a flat, keyway, gear and a variety of forming surface processing methods commonly used Processing the workpiece in the milling machine, the general adop

23、tion of the following types of clamping methods: (1) directly in the milling machine table clamping a large workpiece clamping often directly in the table, with stud、plate compactor, which need to dial indicator methods, tools such as zoned to find the needle surface and the cutter is processing rel

24、ative position. (2) vice flat tool used for clamping the workpiece in the shape of a simple, small parts, general machine tools can be used in clamping vice in the mouth, the need to ensure that when used in machine vice the correct position. (3) dividing head with the workpiece clamping, the need f

25、or indexing of the workpiece, the general direct clamping head in the sub-degrees. In addition, indexing of the workpiece without dividing head with clamping processing is also very convenient. (4) with V-shaped frame workpiece clamping method is generally applicable to shaft parts, in addition to h

26、aving a better than neutral, but also to bear a greater cutting force. 銃床夾具設(shè)計特點 一、銃床夾具的主要類型及結(jié)構(gòu)形式 銃床夾具主要用于加工零件上的平面、凹槽、鍵槽、花鍵、缺口及各種成形 面。由于銃削加工通常是夾具隨工作臺一起作進給運動,按進給方式不同銖床夾 具可分為直線進給式、圓周進給式和靠模進給式三種類型。 1. 直線進給式銃床夾具 這類銖床用得最多。夾具安裝在銖床工作臺上，加工中隨工作臺按直線進給 方式運動。 根據(jù)工件質(zhì)量、結(jié)構(gòu)及生產(chǎn)批量,將夾具設(shè)計成單件多點、多件平行和多件 連續(xù)依次夾緊的聯(lián)動方式，有時還要采用分

27、度機構(gòu)，均為了提高生產(chǎn)效率。 2. 圓周進給式銃床夾具 圓周進給銖削方式在不停車的情況下裝卸工件，一般是多工位,在有回轉(zhuǎn)工 作臺的銖床上使用。 這種夾具結(jié)構(gòu)緊湊，操作方便，機動時間與輔助時間重罷，是高效銃床夾具, 使用于大批量生產(chǎn)。 3. 靠模銃床夾具 這種帶有靠模的銃床夾具用在專用或通用銃床上加工各種非圓曲面?？磕５?作用是使工件獲得輔助運動,形成仿形運動。按主進給運動方式,靠模銃床夾具 可分為直線進給和圓周進給兩種。 二、銃床夾具的設(shè)計要點 由于銃削加工切削用量及切削力較大,又是多刃斷續(xù)切削，加工時易產(chǎn)生振 動，因此設(shè)計銃床夾具時應(yīng)注意:夾緊力要足夠且反行程自鎖；夾具的安裝要準 確可靠,即

28、安裝及加工時要正確使用定向鍵、對刀裝置；夾具體要有足夠的剛度 和穩(wěn)定性，結(jié)構(gòu)要合理。 1 定向鍵 定向鍵也稱定位鍵,安裝在夾具底面的縱向槽中,般用兩個，安在一條直 線上，其距離越遠，導向精度越高，用螺釘緊固在夾具體上。 定向鍵通過與銃床工作臺上的形槽配合確定夾具在機床上的正確位置；還能 承受部分切削扭矩，減輕夾緊螺栓的負荷，增加夾具的穩(wěn)定性，因此平面夾具及 有些專用鉆錘床夾具也常使用。 定向鍵有矩形和圓形兩種。 定向精度要求高或重型夾具不宜采用定向鍵,而是在夾具體上加工出一窄長 面作為找正基面來校正夾具的安裝位置。 對刀裝置由對刀塊和塞尺組成,用來確定夾具和刀具的相對位置。對刀裝置 的結(jié)構(gòu)形式取決于加工表面的形狀。 對刀塊常用銷釘和螺釘緊固在夾具體上,其位置應(yīng)便于使用塞尺對刀,不妨 礙工件裝卸。對刀時,在刀具與對刀塊之間加_塞尺,避免刀具與對刀塊直接接 觸而損壞刀刃或造成對刀塊過早磨損。塞尺有平塞尺和圓柱形塞尺兩種，其厚度 和直徑為3 5mm,制造公差h6。對刀塊和塞尺均已標準化(設(shè)計時可查閱相關(guān)手 冊)，使用時,夾具總圖上應(yīng)標明塞尺尺寸及對刀塊工作表面與定位元件之間的