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DESIGN AND CONSTRUCTION OF MULTIPLE LATHE TOOL POST

DESIGN AND CONSTRUCTION OF MULTIPLE LATHE TOOL POST

Abstract

A lathe tool post is a special clamping device that rigidly holds the lathe tool or tooling to the carriage of the lathe. A basic lathe tool post is designed to hold one turning or facing tool. More typically, a multiple lathe tool post might hold multiple tools, depending on the configuration of the lathe.
To use a multi-tool post, the lathe operator locks the desired tool into place, then locates the center line of the spindle with the cutting edge of the tool. The operator might need several attempts adjusting the tool post and tooling until the lathe tooling has been correctly centered. After it has been centered and clamped, the turning or facing tools should remain with the correct center line orientation while the new tools, also clamped by the same post, are bought into the cutting position.

CHAPTER ONE
1.0                                                        INTRODUCTION
The lathe is a machine tool used principally for shaping pieces of metal (and sometimes wood or other materials) by causing the workpiece to be held and rotated by the lathe while a tool bit is advanced into the work causing the cutting action. The basic lathe that was designed to cut cylindrical metal stock has been developed further to produce screw threads, tapered work, drilled holes, knurled surfaces, and crankshafts. Modern lathes offer a variety of rotating speeds and a means to manually and automatically move the cutting tool into the workpiece. Machinists and maintenance shop personnel must be thoroughly familiar with the lathe and its operations to accomplish the repair and fabrication of needed parts.
A lathe tool post is a special clamping device that rigidly holds the lathe tool or tooling to the carriage of the lathe. A basic lathe tool post is designed to hold one turning or facing tool.
If lathe tooling is swapped in and out frequently, a single-tool post might become a hindrance. Often, a single-tool post is replaced by a multi-tool post, quick-change tool post or an indexable tool post. Each of these types of posts can hold two tools or more. Having a tool post that is capable of holding multiple tools might reduce the operator’s setup and/or changeover time between lathe jobs.
To use a multi-tool post, the lathe operator locks the desired tool into place, then locates the center line of the spindle with the cutting edge of the tool. The operator might need several attempts adjusting the tool post and tooling until the lathe tooling has been correctly centered. After it has been centered and clamped, the turning or facing tools should remain with the correct center line orientation while the new tools, also clamped by the same post, are bought into the cutting position.
An indexable tool post allows the operator to unlock, index and re-lock the tooling without disturbing the position of the tooling relative to the center line of the lathe. A quick-change tool post can be easily removed from and replaced onto the lathe. These are especially useful when the tooling requirements exceed the tool capacity of a single post. This way, a series of tooling can be prepared ahead of time and exchanged as needed.
In addition, lathes also can be equipped with a rear tool post. To use a rear tool post, usually the cutting edge of the tooling faces upside down as compared with the tooling on the front tool post. This allows the operator to use both front and rear sets of tooling while running the lathe in the same direction.
Sometimes tool posts can be removed from the lathe altogether. This is done for accessibility or to replace them with optional tooling. Inside diameter/outside diameter (ID/OD) grinding or milling attachments are sometimes used in place of a lathe tool post.
1.2                                              PURPOSE OF THE PROJECT
The purpose of the lathe tools post is to rigidly hold the lathe tool or tooling to the carriage of the lathe.
1.3                                                   AIM OF THE PROJECT
The aim of this work is to design a multiple lathe post tools which is one of the major part of lathe machine that will be able to rigidly hold the lathe tool or tooling to the carriage of the lathe.
1.4                                         SIGNIFICANCE OF THE PROJECT
In using the multiple lathe post tools, lathe operator locks the desired tool into place, then locates the center line of the spindle with the cutting edge of the tool. The operator might need several attempts adjusting the tool post and tooling until the lathe tooling has been correctly centered. After it has been centered and clamped, the turning or facing tools should remain with the correct center line orientation while the new tools, also clamped by the same post, are bought into the cutting position.

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