Swiss type automatic lathe is a type of single spindle automatic lathe machine. The Swiss type automatic lathe machine is used for machining small and slender parts. This lathe is called by many names such as Swiss type automatic lathe, Sliding head automatic lathe, and moving headstock lathe machine. The headstock moves in the axial direction and so it is named as sliding head or moving headstock lathe machine.Swiss type automatic lathe machine diagramMost probably this type of lathe machine is used for mass production, manufacturing slender and tubular objects etc. Even small diameter parts can be machined by this lathe. It can machine those parts at an accuracy of 0.005 mm to 0.0120 mm. Both conventional automatic lathe and Swiss type automatic lathe are not the same, they are different from each other in many aspects.
The feed base of Swiss type lathe is mounted on the right side just next to the tool bracket and they can move along the bed. Their movement can be controlled by the plate cam which is fitted on the camshaft. The feed base attachment is used for performing multiple operations such as drilling, boring, and thread cutting.CamshaftIn Swiss type automatic lathe, the camshaft is mounted at the front of the machine to control the movement of the lathe parts. This shaft consists of three cams and they are fitted at three different places in the shaft. The bell cam camp is fitted at the right end of the shaft to control the movement of the sliding headstock. Plate cams are fitted in the middle and right end of the camshaft to control the movement of the tool bracket and feed base.Working principle of swiss type automatic lathe machineThe rotating collet in sliding headstock holds the bar stock. In headstock, the sliding movement is initiated by the belt cam which is attached to the camshaft. Hence the longitudinal feed is obtained. There is a hard round brush in the tool head or bracket which helps in guiding the bar stock. The tool bracket consists of five single point cutting tools to perform multiple operations.In the tool bracket, the bar stock is made to pass radial through the cutting tools. After headstock sliding and longitudinal feed is given, all tools in the tool head start removing the material from bar stock. These tools can be able to undergo multiple operations at the same time.
Swiss Type Automatic Lathe Pdf Free
Cutting operations like turning and farming are mostly done by the tools in a horizontal setup. The tools in the vertical setup can able to do other operations such as undercutting, chamfering, knurling and cutting off. The headstock comes back to its original position after finishing the machining process.Swiss type automatic lathe gearing diagramif(typeof ez_ad_units!='undefined')ez_ad_units.push([[300,250],'engineeringtribe_com-box-4','ezslot_1',260,'0','0']);__ez_fad_position('div-gpt-ad-engineeringtribe_com-box-4-0');The above line diagram is about a typical transmission in Swiss type automatic lathe machine. This lathe machine is equipped with two motors called the main motor and an independent drive. The main motor is directly connected with the back shaft and it drives it at high speed.Rotational motion of the back shaft is transmitted to the main camshaft using a lot of power transmission elements such as a worm, worm wheel, change gears, belt drives etc. The main camshaft and various cams such as bell cam or disc cam, tool cam, and end tool cam control the entire machine movements.Particularly the movement of the headstock and tool slides are controlled using this main motor. The independent motor drive controls the movement of the end attachments called feed base and end tools. There are three spindles available to carry end tools in the feed base and all the spindles can be either at rest or in movement.The feed base can be moved in sideways according to the position of the cam mounted in the camshaft. In Swiss type automatic lathe machine one complete revolution of the camshaft is considered as cycle time and it produces one compound at one revolution of the camshaft.
From 3D CAD file to machine-optimized G-code, ESPRIT unlocks the full potential of the Swiss-type turning center. It meets the demands of Swiss programming with a natural workflow powered by a full suite of milling and turning cycles, high-speed machining, and FreeForm cycles for simultaneous 3- and 5-axis milling. Fine-tune cutting paths with extensive control, minimize cycle times with multi-channel process synchronization, and reduce on-machine setup time with full simulation of the machine and the program. ESPRIT is the right choice for an all-in-one programming solution that produces edit-free G-code for all classes Swiss-type CNC turning centers.
In metalworking and woodworking, an automatic lathe is a lathe with an automatically controlled cutting process. Automatic lathes were first developed in the 1870s and were mechanically controlled. From the advent of NC and CNC in the 1950s, the term automatic lathe has generally been used for only mechanically controlled lathes, although some manufacturers (e.g., DMG Mori and Tsugami) market Swiss-type CNC lathes as 'automatic'.[3]
The term "automatic lathe" is still often used in manufacturing in its earlier sense, referring to automated lathes of non-CNC types. The first automatic lathes were mechanically automated and controlled by cams or tracers and pantographs. Thus, before electronic automation via numerical control, the "automatic" in the term "automatic machine tool" always referred implicitly to mechanical automation.
The earliest mechanically automated lathes were geometric lathes, including rose engine lathes. In industrial contexts during the Machine Age, the term "automatic lathe" referred to mechanical screw machines and chuckers.
Since the maturation of CNC, the implicit dichotomy of "manual versus automatic" still exists, but because CNC is so ubiquitous, the term "automatic" has lost some of its distinguishing power. All CNC machine tools are automatic, but the usage in the machining industries does not routinely call them by that term. The term "automatic", when it is used at all, still often refers implicitly to cam-operated machines. Thus a 2-axis CNC lathe is not referred to as an "automatic lathe" even if fully automated.
Small- to medium-sized cam-operated automatic lathes are usually called screw machines or automatic screw machines. These machines work on parts that (as a rough guide only) are up to 80 millimetres (3.1 in) in diameter and 300 millimetres (12 in) in length. Screw machines almost invariably do bar work, meaning a length of bar stock passes through the spindle and is gripped by the chuck (usually a collet chuck). As the part is being machined, the entire length of bar stock is rotated with the spindle. When the part is done, it is 'parted' from the bar, the chuck in released, the bar fed forward, and the chuck closed again, ready for the next cycle. The bar-feeding can happen by various means, including pulling-finger tools that grab the bar and pull or roller bar feed that pushes the bar from behind.
Larger cam-operated automatic lathes are usually called automatic chucking lathes, automatic lathes, automatic chuckers, automatics, or chuckers. The 'chucker' part of the name comes from the workpieces being discrete blanks, held in a bin called a "magazine", and each one takes a turn at being chucked and machined. (This is analogous to the way that each round of ammunition in the magazine of a semi-automatic pistol gets its turn at being chambered.) The blanks are either individual forgings or castings, or they are pre-sawn pieces of billet. However, some members of this family of machine tools turn bar work or work on centers (e.g., the Fay automatic lathe). Regarding bar work of large diameter (for example, 150 millimetres (5.9 in) or more), it is merely an academic point whether it is called "screw machine work" or just "automatic work".
Screw machines, being the class of automatic lathes for small- to medium-sized parts, are used in the high-volume manufacture of a vast variety of turned components. During the Swiss screw machining process, the workpiece is supported with a guide bushing, near the cutting tool.[5]
The definition of the term screw machine has changed with changing technology. Any use of the term prior to the 1840s, if it occurred, would have referred ad hoc to any machine tool used to produce screws. That is, there would have been no established differentiation from the term screw-cutting lathe. When turret lathes were developed in the 1840s, the term screw machine was applied to them in overlapping usage with the term turret lathe. In 1860, when some of the movements, such as turret indexing, were mechanically automated, the term automatic screw machine was applied, and the term hand screw machine or manual screw machine was retronymously applied to the earlier machines. Within 15 years, the entire part-cutting cycle had been mechanically automated, and machines of the 1860 type were retronymously called semi-automatic. From that time on, machines with fully automated cycles were usually called automatic screw machines, and eventually, in the usage of most people in the machining industries, the term screw machine no longer was used to refer to manual or semi-automatic turret lathes, having become reserved for one class of machine, the fully mechanically automated type. This narrow meaning of screw machine remained stable from about the 1890s until the 1950s. (Brown & Sharpe continued to call some of their hand-operated turret lathe models "screw machines", but most machinists reserved the term for automatics.) Within this class called screw machines there were variations, such as single-spindle versus multispindle, horizontal-turret versus vertical-turret, etc.
An automatic chucking machine is similar to an automatic screw machine; both use spindles in production. The use of spindles, which are able to drill, bore and cut the workpiece, allows several functions simultaneously on both machines. A key difference between the machines is that the automatic chucker handles larger work, which due to its size is more often chucking work and less often bar work.[6] The Fay automatic lathe was a variant that specialized in turning work on centers. While a screw machine is limited to around 80 millimetres (3.1 in) practice, automatic chuckers are available that can handle up to 300 millimetres (12 in) chucks. The chucks are air-operated. Many of these machines are multispindle (more than one main spindle). 2ff7e9595c
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