Cutting Oil Groove Slots In Milling Machine Tables

Gears are most important power transmission device used in mechanical assemblies. Gears are varies with respect to types , size , module, numbers of teeth on gears. Further gears may vary depending on pressure ration and pitch circle diameter. There are some manufacturing methods are available for producing the gears.

This includes cutting front and rear sight dovetails, milling the rear of a 1911 slide to accept a low-mount rear sight, and cutting front cocking grooves on the front of a 1911 slide. After completing this project, all my shooting buddies now want me to mill dovetails and front cocking grooves in their pistols! Mill Machining, Milling Process, Horizontal & Vertical Milling Machines Definition. Milling is a process performed with a machine in which the cutters rotate to remove the material from the work piece present in the direction of the angle with the tool axis. With the help of the milling machines one can perform many operations and functions starting from small objects to large ones. The original class of machine tools for milling was the milling machine (often called a mill). After the advent of computer numerical control (CNC) in the 1960s, milling machines evolved into machining centers: milling machines augmented by automatic tool changers, tool magazines or carousels, CNC capability, coolant systems, and enclosures.

Gear manufacturing can be divided into two categories namely forming and machining as shown in flow chart in Fig . Forming consists of direct casting, molding, drawing, or extrusion of tooth forms in molten, powdered, or heat softened materials and machining involves roughing and finishing operations.

Methods Of Manufacturing Of all types of Gears

AIM:
To machine gear to the given module and number of teeth in the given work piece.

TOOLS AND EQUIPMENT’S REQUIRED:
1. Milling machine
2. Vernier caliper
3. Mandrel.

PROCEDURE:

Cutting Oil Groove Slots In Milling Machine Tables

1. Calculate the gear tooth proportions.
Where,
Blank diameter = (Z + 2) m
Tooth depth = 2.25 m
Tooth width = 1.5708 m
Z = Number of teeth required
m = module
Indexing calculation
Index crank movement = 40 / Z

2. The dividing head and the tail stock are bolted on the machine table. Their axis must be set parallel to the machine table.
3. The gear blank is held between the dividing head and tail stock using a mandrel. The mandrel is connected with the spindle of dividing head by a carrier and catch plate.
4. The cutter is mounted on the arbor. The cutter is centered accurately with the gear blank.
5. Set the speed and feed for machining.
6. For giving depth of cut, the table is raised till the periphery of the gear blank just touches the cutter.
7. The micrometer dial of vertical feed screw is set to zero in this position.
8. Then the table is raised further to give the required depth of cut.
9. The machine is started and feed is given to the table to cut the first groove of the blank.
10. After the cut, the table is brought back to the starting position.
11. Then the gear blank is indexed for the next tooth space.
12. This is continued till all the gear teeth are cut.

CALCULATION:

Z = No.of teeth = 23
m = module = 2 mm

Blank Diameter = (Z + 2) *m
= (23 + 2) *2
= 50 mm

Tooth Depth = 2.25 m
= 2.25 *2
= 4.5 mm

Indexing Calculation
= 40 / Z
= 40 / 23
= 1.739

February 26, 2020

Milling and grinding are two common machining processes performed in the manufacturing industry. They both involve the removal of material from a workpiece, and they both support a wide variety of materials. Whether a workpiece is made of iron, aluminum, steel, copper or any other metal or alloy, it can probably be manipulated via milling or grinding. Milling and grinding aren’t the same, however. They each work in a different way to remove material from a workpiece.

What Is Milling?

Milling is a machining process that involves the use of a milling machine to remove material from a workpiece. Milling machines feature cutting blades that rotate while they press against the workpiece. The workpiece is secured in place so that it doesn’t rotate or otherwise rotate. During operation, though, the milling machine will press a rotating cutting tool against the stationary workpiece. As the cutting tool moves across the workpiece, it scraps off material, resulting in a smaller size.

Milling can be classified as either face or peripheral, depending on the position of the cutting tool. Face milling involves a cutting action at the corners of the cutting tool, whereas peripheral milling involves a cutting action that runs the circumference of the cutting tool. Peripheral milling is typically used for cutting deep slots and gear teeth.

What Is Grinding?

Grinding, on the other hand, is a machining process that involves the use of a disc-shaped grinding wheel to remove material from a workpiece. There are several types of grinding wheels, some of which include grindstones, angle grinders, die grinders and specialized grinding machines. Regardless of the grinding wheel, though, all grinding processes use abrasive particles to “grind” away material from a workpiece’s surface.

When a workpiece is exposed to a grinding wheel, some of its material will rub off. With that said, grinding is often used to both remove material from workpieces as well as polish workpieces. If a workpiece has a coarse surface, grinding can make it smoother. The abrasive particles on the grinding wheel will smooth and, therefore, polish the workpiece’s surface.

In Conclusion