SHOP 2LATHE ACC.

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Information about SHOP 2LATHE ACC.
Education

Published on July 22, 2009

Author: zaido66

Source: authorstream.com

Slide 1: Ken Youssefi PDM I, SJSU 1 ENGINE LATHE ACCESSORIES OBJECTIVES : Ken Youssefi PDM I, SJSU 2 OBJECTIVES IDENTIFY & KNOW THE VARIOUS LATHE ACCESSORIES FAMILIARIZE ITS FUNCTION AND USES. Slide 3: Ken Youssefi PDM I, SJSU 3 INTRODUCTION MANY LATHE ACCESSORIES ARE AVAILABLE TO INCREASE THE VERSATILITY OF THE LATHE AND THE VARIETY OF WORK THAT CAN BE MACHINED. LATHE ACCESSORIES MAY BE DIVIDED INTO TWO CATEGORIES: WORK-HOLDING,-SUPPORTING,AND –DRIVING DEVICES (INCLUDE LATHE CENTERS,CHUCKS,FACEPLATES,MANDRELS,STEADY AND FOLLOWER RESTS,LATHE DOGS AND DRIVE PLATES.) CUTTING-TOOL-HOLDING DEVICES (INCLUDE VARIOUS TYPES OF STRAIGHT AND OFFSET TOOLHOLDERS, THREADING TOOLHOLDERS,BORING BARS,TURRET TYPE TOOLPOSTS, AND QUICK CHANGE TOOLPOST ASSEMBLIES.) Slide 4: Ken Youssefi PDM I, SJSU 4 CHUCKS ARE WORK HOLDING DEVICES,WHICH GRIP WORK OF VARIOUS SIZES AND SHAPE BY MEANS OF ADJUSTABLE JAWS.THERE ARE MANY TYPES OF CHUCK,BUT THE MOST COMMONLY USED ARE: UNIVERSAL CHUCK-A THREE JAW SELF CENTERING CHUCK.THIS CHUCK IS USED TO HOLD ROUND,TRIANGULAR,HEXAGONAL WORK.IT IS CONSTRUCTED SO THAT THE THREE JAWS MOVE SIMULTANEOUSLY IF OPERATED PROPERLY,THEY WILL ALIGN THE WORK ABOUT THE CENTER OF ROTATION IN THE SPINDLE. Slide 5: Ken Youssefi PDM I, SJSU 5 INDEPENDENT CHUCK-THIS CHUCK HAS FOUR JAWS THAT CAN BE MOVED INDEPENDENTLY OF EACH OTHER.THIS CHUCK ARE USED TO HOLD REGULAR AND IRREGULAR ODD SHAPED JOB/WORK. ADVANTAGES OF AN INDEPENDENT CHUCK: EACH JAW CAN BE MOVED INDEPENDENTLY BY TURNING A SCREW WITH A CHUCK KEY. WORK CAN BE HELD VERY FIRMLY BECAUSE EACH JAW OPPOSES THE OTHER. WORK CAN BE SETUP TO RUN VERY TRUE BY ADJUSTING THE JAWS AND CHECKING THE WORK WITH DIAL INDICATOR. EACH JAW CAN BE REVERSED INDEPENDENTLY TO ENABLE ODD SHAPED WORK TO BE HELD. CONCENTRIC CIRCLES MARKED ON THE FACE TO ASSIST IN LOCATING WORK CENTRALLY. Slide 6: Ken Youssefi PDM I, SJSU 6 This chuck holds steel work pieces by means of permanent magnets contained within the chuck. The face of the chuck is magnetized by inserting a key in the chuck and turning it (180 degree). The amount of magnetism may be controlled by turning the key only part of the required distance, in this manner, a work piece may be held light on the face MAGNETIC CHUCK Slide 7: Ken Youssefi PDM I, SJSU 7 This chuck provides a quick method for gripping work. This collect chuck is for precision work in the making parts for watches, typewriters, radios, components, etc. COLLET CHUCK Slide 8: Ken Youssefi PDM I, SJSU 8 COMBINATION CHUCK It is used for gripping irregular shaped job/work. Slide 9: Ken Youssefi PDM I, SJSU 9 Is used to hold and drive work that cannot be held between centers in a chuck. Slots in the face plate allow the work to be bolted in position. Counter balance must be used when large work is mounted out off-center on the face plate, this provides to lessen vibrations due to the force exerted by the work. FACEPLATE Slide 10: Ken Youssefi PDM I, SJSU 10 The plate is used to drive work that has been set up between centers. The plate rotates the work; it does not support it any way. A lathe carrier is used to connect the work with the plate which is known as Lathe Dog. DRIVEPLATE Slide 11: Ken Youssefi PDM I, SJSU 11 LATHE DOG STRAIGHT TAIL LATHE DOG BENT TAIL LATHE DOG Slide 12: Ken Youssefi PDM I, SJSU 12 Used as bearing support which is mounted in the Tailstock, while turning long/lengthy or slender job. It has pointed conical nose with standard included angle of 60 degree (it does not turn with the work). DEAD CENTER Slide 13: Ken Youssefi PDM I, SJSU 13 Used as bearing support which is mounted in the tailstock, it is used the same as Dead Center with the same included angle of 60 degree. It has an advantage compared with the dead center because it turns with the work; it has a bearing ball that enables the center to rotate with the work. LIVE CENTER Slide 14: Ken Youssefi PDM I, SJSU 14 Use as a support for long slender stock during turning operation. It is attached or fastened to the carriage and run together with the feed. FOLLOWER REST Slide 15: Ken Youssefi PDM I, SJSU 15 A device fastened to the bed ways, the adjustable jaws forming a bearing support for the work to hold it in centered position. It is used to support the end of long slender stock where the other end is held or centered in a chuck. STEADY REST Slide 16: Ken Youssefi PDM I, SJSU 16 It is mounted at the rear portion of the saddle. The slide is set at the desired angle so that the tool follows the angle set on the slide. The center line of the work is parallel to the center line of the machine; since the tool is traveling to the centerline of the machine a Taper is cut. Range of Taper is up to (10-12 degree only.) TAPER ATTACHMENT Slide 17: Ken Youssefi PDM I, SJSU 17 to hold the tool bit which is mounted in the Tool Post. Armstrong Tool Holder are commonly used which is of three types such as: Left hand, Right hand and Straight TOOL HOLDER Slide 18: Ken Youssefi PDM I, SJSU 18 A part of Lathe wherein the Cutting Tool is being carried, during the machining operation, commonly use Tool Post are (standard tool post, open side, turret block, quick change). TOOL POST

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