MP – I BROACHING machines MADE BY : SHRIYANSH SINGH (130950119127) RONAK SONI(130950119106) SUMIT K. SINGH(130950119132) SHIVAM RANA(130950119103) VIRAJ VICHARE(130950119141) SHUBHAM(130950119091)

Introduction : Broaching is a machining process that uses a toothed tool, called a broach, to remove material. Broaching is an unusual machining process because it has the feed built into the tool.

Introduction : A broach is effectively a collection of single point cutting tools arrayed in sequence, cutting one after the other; its cut is analogous to multiple passes of a shaper. A Broach is a special multipoint cutting tool. Broaches are shaped similar to a saw, except the teeth height increases over the length of the tool. The broach contains three distinct sections: One for roughing, Another for semi-finishing, and The last one for finishing.

Semi Finishing Finishing Broach Broach Roughing broach

Broaches

Introduction : Broaching speeds vary from 20 to 120 surface feet per minute (SFPM). This results in a complete cycle time of 5 to 30 seconds. Most of the time is consumed by the return stroke, broach handling, and work piece loading and unloading.

Classification of broaching Machines : According to nature and direction of cutting Horizontal Broaching Machine Vertical Broaching Machine Continuous Broaching Machine According to the purpose Internal Broaching Machine External Broaching Machine

Classification of broaching Machine : According to the construction of the broach tool Solid Broaching Machine Inserted tooth Broaching Machine Progressive Cut Broaching Machine Built-up Broaching Machine According to the function Keyway Broaching Machine Burnishing Broaching Machine Splining Broaching Machine Round-Hole Broaching Machine Surface Broaching Machine

Classification of broaching Machine : According to the number of main slides Single Broaching Machine Double Broaching Machine Multiple slides Broaching Machine According to the motion of Broach tool Straight-line Broaching Machine Stationery Broach tool Broaching Machine

Broach tool :

broaches

Kinds of broaches :

Broaching samples :

Suitable materials : BRASS BRONZE COPPER ALLOYS ALUMINIUM GRAPHITE HARD RUBBERS WOOD COMPOSITES PLASTIC.

Broaching machines : Horizontal Broaching Machine : In this type, the broach moves in horizontal direction relatively with the workpiece. Otherwise, the workpiece is set in horizontal motion relative to the broach. Both internal and surface broaching can be performed using HBM.

Horizontal Broaching Machine :

Vertical Broaching Machine : The working of vertical broaching machine is similar to that of horizontal broaching machine. Here, either the broach is set in vertical motion instead of horizontal motion. It is further classifies into 3 types, namely Pull up type Pull down type Push down type

Vertical Broaching Machine :

Continuous broaching machine : Continuous type : This type is used for mass production of smaller parts. The broaches are fitted into a belt driven by a set of pulleys, such that the workpiece is held normal to the broach.

CONTINOUS BROACHING MACHINE

rotary broaching machine : Rotary type : This machine has a rotary table and vertical column. The broach is fitted horizontally above the table. A series of fixtures are mounted on the rotay table for locating and holding work pieces. They move past the stationarey broaches. Rotary broaching machines are limited to small parts. They are used for squaring distributor shaft, slotting and the facing of smaller parts.

ROTARY BROACHING MACHINE

Broaching – specifications : Broaching speeds vary from 20 to 120 surface feed per minute (SFPM). This results in a complete cycle time of 5 to 30 seconds. Most of the time is consumed by the return stroke, broach handling, and workpiece loading and unloading. Common internal holes can range from 0.125 to 6 in (3.2 to 150 mm) in diameter but it is possible to achieve a range of 0.05 to 13 in (1.3 to 330 mm).

Broaching – specifications : Surface broaches' range is usually 0.075 to 10 in (1.9 to 250 mm), although the feasible range is 0.02 to 20 in (0.51 to 510 mm). Tolerances are usually ±0.002 in (±0.05 mm), but in precise applications a tolerance of ±0.0005 in (±0.01 mm) can be held. Surface finishes are usually between 16 and 63 microinches (μin), but can range from 8 to 125 μin.[10] There may be minimal burrs on the exit side of the cut.

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