Simple Indexing in Milling Machine:
- Index Plate-. An index plate is a round metal plate with a series of six or extra circles of evenly spaced holes; the index pin on the crank can ...
- Simple Indexing-. Simple indexing on a milling machine is passed out through the use also a plain indexing head or universal dividing head.
- Compound Indexing-. ...
- Differential Indexing-. ...
- Direct Indexing-. ...
How to index on a milling machine?
Simple indexing on a milling machine is passed out through the use also a plain indexing head or universal dividing head. This process of indexing involves the use of a worm, crank, index head, and worm wheel.
How does a direct indexing machine work?
Direct indexing is able by an additional index plate fixed to the index head spindle. The motionless plunger in the index head fits the holes in the index plate. By moving the plate with hand to index directly, the spindle with the workpiece turns an equal distance.
What are the different methods of indexing?
There are five methods of indexing. (5) Angular indexing. 1. Direct Indexing: In this case, the dividing head has an index plate, fitted directly on the spindle. The intermediate use of worm and worm-wheel is avoided. The index plate has 24 holes and the periphery of job can be divided into 2, 3, 4, 6, 8 and 12 equal parts directly.
What is indexing in machining?
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.
What are the methods of indexing in milling operations?
There are the following indexing methods employed in a milling machine.Linear Indexing.Differential Indexing.Angular Indexing.Direct Indexing.Simple Indexing.Compound Indexing.
Why is indexing done on milling machine?
Meaning of Indexing: This is accomplished with the help of a milling attachment known as dividing head, which is an accessory to the milling machine. It helps to divide the job periphery into a number of equal divisions, i.e., square, hexagonal octagonal, etc.
What is indexing how indexing is done for manufacturing gear?
The indexing head is the operation of dividing the periphery of a workpiece into any number of equal parts. While cutting the spur gear, an equal spacing of the teeth on the gear blank is performed by indexing.
What is index plate in milling machine?
An index plate is a machine tool that clamps the workpiece on the chuck or between two centers and makes it rotate, index and position. The index plate is one of the important accessories of the milling machine. Most of them are suitable for CNC machine tools, grinding machines, and all kinds of special machines.
What is the method of indexing?
The indexing method means the approach used to measure the amount of change, if any, in the index. Some of the most common indexing methods include ratcheting (annual reset), and point-to-point.
What are the types of indexing?
There are primarily three methods of indexing:Clustered Indexing.Non-Clustered or Secondary Indexing.Multilevel Indexing.
What is indexing explain any two methods of indexing?
Indexing is a small table which is consist of two columns. Two main types of indexing methods are 1)Primary Indexing 2) Secondary Indexing. Primary Index is an ordered file which is fixed length size with two fields. The primary Indexing is also further divided into two types 1)Dense Index 2)Sparse Index.
What is indexing in mechanical?
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.
What is an indexing plate?
Definition of index plate : a graduated circular plate or one with circular rows of holes differently spaced that is used in machines (as for graduating circles or cutting gear teeth)
How does an indexing head work?
8:5611:41How to Use a Dividing Head - YouTubeYouTubeStart of suggested clipEnd of suggested clipFor angular indexing you need to know how many degrees the spindle turns with each turn of theMoreFor angular indexing you need to know how many degrees the spindle turns with each turn of the handle. That's found by dividing 360. The number of degrees in a circle. By. The gear reduction. So on
Simple Indexing in Milling Machine
The index plate is a circular plate consisting of a series of six or more circles of evenly spaced holes; the index pin on the crank can be inserte...
Index Plate-
An index plate is a round metal plate with a series of six or extra circles of evenly spaced holes; the index pin on the crank can put in in any ho...
Simple Indexing
Simple indexing on a milling machine is passed out through the use also a plain indexing head or universal dividing head. This process of indexing...
Compound Indexing
As the number of divisions necessary on the job is external, the vary of simple indexing methods of compound indexing is used. Operation is passed...
Differential Indexing-
At times a number of divisions are necessary, which cannot be achieved through simple indexing by the index plates frequently supplied. Get these d...
Direct Indexing-
The creation of several index heads allows the worm to be detached as of the worm wheel, creation a possible faster way of indexing, call direct in...
Plain Indexing-
Assume it is preferred to mill spur gear by 8 equally spaced teeth. As 40 turns of index crank will turn spindle one full revolve, one-eighth of 40...
Indexing Operation-
Two follow exemplar explain how to index plate is used to get any preferred part of an entire spindle turn by plain indexing.
What is indexing in a machine?
Indexing is an operation of dividing a periphery of a cylindrical workpiece into equal number of divisions by the help of index crank and index plate. Because the operator of the machine may want to rotate the part to an arbitrary angle indexing plates are used to ensure the part is accurately positioned.
What is an index plate?
The index plate is a circular plate consisting of a series of six or more circles of evenly spaced holes; the index pin on the crank can be inserted into any hole in any circle. Interchangeable plates are regularly furnished with the most divided heads, the required spacing for most gears, bolt heads, milling cutters, splines, etc.
How many teeth does a milling machine have?
This process of indexing involves the use of a worm, crank, index head, and worm wheel. The worm wheel usually carries 40 teeth, with the worm is single-threaded. By this arrangement, as a crank completes one revolution, ...
How many holes are in a direct index plate?
Direct index plates generally have 24 holes and present a rapid means of milling squares, hexagons, taps, and soon. Some number of divisions which is a factor of 24, can be indexed rapidly and suitably by the direct indexing method.
What is the operation of rotating the job through a required angle between two successive cuts?
The operation of rotating the job through a required angle between two successive cuts is termed as indexing. This is accomplished with the help of a milling attachment known as dividing head, which is an accessory to the milling machine.
How to cut gear of 42 teeth?
To Cut a Gear of 42 Teeth:- By rule over, divide 40 by 42, which equals 40/42 or 20/21 turns, 40 spaces on 42-hole circle or20 spaces on the 21-hole circle. To apply the rule given, choose a circle that has a number of holes dividable through the required fraction of turn concentrated to its lowly terms.
Indexing Head Definition
An indexing head, also known as a dividing head or spiral head, is a specialized tool that allows a workpiece to be circularly indexed; that is, easily and precisely rotated to preset angles or circular divisions.
1. Direct Indexing
The direct indexing is also called Rapid indexing, and it is used when a large number of pieces are indexed with a small division.
2. Simple or Plain Indexing
Simple indexing is also called as 9 indexing. It is more accurate and has a large range of indexing than rapid indexing.
3. Angular Indexing
The angular indexing is the Process of dividing the periphery of work in angular measurements.
4. Compound Indexing
In Compound indexing, there are two separate movements of the index crank in two different hole circles of one index plate to get the crank movement.
5. Differential Indexing
Available number of index plates with different hole circles, sometimes confine the range of plain indexing. In such cases, differential indexing is found to be more suitable. Between the indexing plate and spindle of dividing head, a certain set of the gears is incorporated extra. Dividing heads are provided with such standard set of gears.
What is the difference between compound indexing and simple indexing?
Compound Indexing: The principle of operation of compound indexing is the same as that of simple indexing, but the only difference is that compound indexing uses two different circles of one plate and hence also sometimes referred to as hit and trial method.
How many holes are in an index plate?
The intermediate use of worm and worm-wheel is avoided. The index plate has 24 holes and the periphery of job can be divided into 2, 3, 4, 6, 8 and 12 equal parts directly. This type indexing is most commonly used for indexing fixture. 2. Simple or Plain Indexing:
What is the ratio of a crank and spindle?
Instead of rotating the job through certain division on its periphery, sometimes it may be needed to rotate the job through certain angle. Angular indexing is used for this purpose. Since the crank and spindle ratio is 40 : 1 and hence when the crank moves through one revolution, the spindle or the job moves through 1/40 of revolution, i.e., the job will revolve through an angular movement of 9°.
What angle should a milling table be set at?
The table of the milling machine must be set at an angle (equal to the helix angle) to the normal position of the table. This is done so that when the job advances and at the same time revolves also, the impression left by the cutter in the job will be identical to the contour of the cutter.
How to rotate a job through required angle?
To rotate a job through required angle, one needs: (i) A device to rotate the job and. (ii) A source which can ensure that the job has been rotated through the desired angle. ADVERTISEMENTS: In dividing head, the first requirement is met by an index-crank and the second by the index plate.
What is indexing head?
The indexing head is the operation of dividing the periphery of a workpiece into any number of equal parts. While cutting the spur gear, an equal spacing of the teeth on the gear blank is performed by indexing.
Which is more accurate, simple indexing or rapid indexing?
Simple Indexing Head: Simple indexing is also called as 9 indexing. It is more accurate and has a large range of indexing than rapid indexing. For indexing, the dividing head spindle is turned by the index crank.
What is differential indexing?
1. Direct Indexing Head: The direct indexing is also called Rapid indexing, and it is used when a large number of pieces are indexed with a small division. This operation can be done in both plain and universal dividing head. When using the Universal head, the worm and worm wheel are first disengaged.
What is the N1 in indexing?
N 1 is the hole circle used by the crankpin. N 2 is hole circle used by the lock pin. n 1 is space moved by the crankpin in N 1 hole circle. n 2 is the spaces moved by the plate and the crankpin in N 2 hole circle. The basic knowledge about indexing, I think now you know.
What is the difference between machining and electrochemical?
The word machining means removal of any substance and the word electrochemical resembles the mode of energy used. The two terms combined together give rise to a process known as electrochemical...
How many degrees does a crank rotate?
There are 360 degrees in a circle, and then the index crank is rotated by 40 number of revolution, and the spindle rotates through 1 complete Revolution or by 360 degrees, one complete turn off the crank will cause the spindle and the work to rotate through 360/40=9 degrees.
Direct Indexing
Simple Or Plain Indexing
- Simple indexing is also called as 9 indexing. It is more accurate and has a large range of indexing than rapid indexing. For indexing, the dividing head spindle is turned by the index crank. The worm shaft carrying the crank has a single-threaded worm which meshes with worm gear having 40 teeth, 40 turns of the crank are necessary to rotate the ind...
Angular Indexing
- The angular indexing is the Process of dividing the periphery of work in angular measurements. There are 360 degrees in a circle, and then the index crank is rotated by 40 number of revolution, and the spindle rotates through 1 complete Revolution or by 360 degrees, one complete turn off the crank will cause the spindle and the work to rotate through 360/40=9 degrees. Therefore in o…
Compound Indexing
- In Compound indexing, there are two separate movements of the index crank in two different hole circles of one index plate to get the crank movement. The index plate is held stationary by Lock pin heed which engages with one of the whole circle of the index place from the back. For indexing first, the crankpin is rotated by the required number of the spaces in one of the holes o…
Differential Indexing
- Available number of index plates with different hole circles, sometimes confine the range of plain indexing. In such cases, differential indexing is found to be more suitable. Between the indexing plate and spindle of dividing head, a certain set of the gears is incorporated extra. Dividing heads are provided with such standard set of gears. During the differential indexing, the index-plate is u…