|Published (Last):||28 January 2008|
|PDF File Size:||4.44 Mb|
|ePub File Size:||20.51 Mb|
|Price:||Free* [*Free Regsitration Required]|
Successfully reported this slideshow. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime. Automatic machines. Upcoming SlideShare.
Like this presentation? Why not share! Embed Size px. Start on. Show related SlideShares at end. WordPress Shortcode. Published in: Engineering. Full Name Comment goes here. Are you sure you want to Yes No. Show More. No Downloads. Views Total views. Actions Shares.
Embeds 0 No embeds. No notes for slide. Automatic machines 1. Automatic lathes can be classified as follows: i Single spindle automatics ii Multi spindle automatics iii Chucking machines iv Horizontal spindle machines v Vertical spindle machines. In fully automatic lathes, once the machine is set up, all the movements related to the manufacturing cycle and also the loading of blanks and the unloading of machined parts are performed without the operator's participation.
In semiautomatic machines, the two latter movements are accomplished by the operator. Multi spindle machines have higher production rate as compared to single spindle machines. Less floor space as compared to horizontal spindle machines.
Turret and Capstan, both, are production machines and are usually of semiautomatic, type. Both turret and capstan lathes are provided with tool head, usually hexagon, to carry a set of tools and to supplement this by an additional slide carrying tools for cutting off and forming operations. A Capstan lathe is usually a small or medium size machine with the tool head carried upon a slide mounted in a saddle bolted to the bed of the lathe, while a turret lathe has the hexagon tool head mounted on a saddle sliding directly on the bed Capstan lathe has the hexagon tool head carried upon a slide mounted in a saddle bolted to the bed of the lathe Turret lathe has the hexagon tool head mounted on a saddle sliding directly on the bed.
Capstan lathe, having a relatively short stroke of the tool head and automatic indexing, results in a rapid presentation of the tools to the work The turret lathe, on the other hand, is suitable for long and heavy work. Size and Specification of Turret Lathes i Maximum diameter of bar that can be passed through the machine spindle ii Swing diameter of the workpiece iii Spindle speeds iv Feeds v Chuck size vi Drive motor capacity In most cases it is a merely flat piece of metal profile machined onto it.
It is attached to a shaft. As the cam rotates it is the profile or shape of the cam that causes the follower to move in a particular way. The movement of the follower is then transmitted to another mechanism or another part of the mechanism.
It is an intermittent gear where the drive wheel has a pin that reaches into a slot of the driven wheel and thereby advances it by one step. Turret indexing mechanism The rotating sleeve mounted on the guide bar carries the rear end of the bar stock. The other end of the bar stock passes through the spindle to project outside the collet chuck. Under the action of wire rope and weight, the sleeve and bar stock have a tendency to move to right i.
After the finished piece has been parted off, the chuck opens and thus the bar stock automatically moves forward and rests against the bar stop fitted on the turret. Multi Spindle Automat Parallel Type Same action on each spindle is performed Number of workpieces machined simultaneously will be equal to number of spindles Multi Spindle Automat Progressive Type Progressive type…..
Multi Spindle Automatic Screw Machines Automatic screw machines were developed for the high speed production of large numbers of identical precision parts. The machine tool has been designed to perform the maximum number of operations, either simultaneously, or in a very rapid sequence. Automatic Screw Machines…. Instead, the cutting tools are held and moved in radial slides. The stock is held and rotated by an accurately made collet.
Swiss Type Screw Machines…. Swiss Type Screw Machines.. You just clipped your first slide! Clipping is a handy way to collect important slides you want to go back to later. Now customize the name of a clipboard to store your clips. Visibility Others can see my Clipboard. Cancel Save.
US2358503A - Turret indexing mechanism - Google Patents
Indexing in reference to motion is moving or being moved into a new position or location quickly and easily but also precisely. When indexing a machine part, its new location is known to within a few hundredths of a millimeter thousandths of an inch , or often even to within a few thousandths of a millimeter ten-thousandths of an inch , despite the fact that no elaborate measuring or layout was needed to establish that location. In reference to multi-edge cutting inserts , indexing is the process of exposing a new cutting edge for use. Indexing is a necessary kind of motion in many areas of mechanical engineering and machining. An object that indexes , or can be indexed , is said to be indexable. Usually when the word indexing is used, it refers specifically to rotation.
This invention relates to turret indexing mechanism and more particularly for lathes, especially turret lathes. This application is a division of a copending application Serial No. The purpose of the invention is to effect an improved turret indexing mechanism adapted for automatic operation, in which all of the different working positions of the turret may be effected one after another if desired or some of them may be selectively passed over during the indexing, as predetermined by the adjustment of the mechanism. A further purpose is to provide improved transmission mechanism for tool and work supporting units or supports of a machine tool, and in a form, for improved cooperative relationship between different units. A further purpose is to provide an improved control mechanism for the transmission mechanism of tool and work supports of a machine tool, and particularly to provide controls for the individual supports suited for cooperation and interconnection between the controls of different supports.