Broach


Also found in: Dictionary, Thesaurus, Medical, Legal, Acronyms, Idioms, Wikipedia.

Broach,

city, India: see BharuchBharuch
, formerly Broach,
city (1991 pop. 139,029), Gujarat state, W India, on the Gulf of Khambat. A port at the mouth of the Narmada River, Bharuch ships cotton, wheat, and timber and manufactures textiles, ink, and glass.
..... Click the link for more information.
.

Broach

A half pyramid above the corners of a square tower to provide a transition to an octagonal spire.

Broach

 

a metalcutting tool with multiple blades used on broaching machines to machine outer surfaces and through-holes. The following broaches are distinguished, based on the shape of the surface to be worked: cylinder, faceted (square, hexagonal, and so forth), spline, keyway, flat surface, and shaped surface broaches.

Figure 1. Broaches: (a) for internal broaching, (b) for external broaching; (1) pull end, (2) and (5) front and rear pilots, (3) cutting section, (4) finishing section

In broaches used for internal broaching (Figure 1, a), the teeth are arranged on a tapered cutting section; they carry out the major work of cutting the final layer of stock to size. The finishing section of the broach has from three to eight teeth. The first of these cut a very thin layer of metal and give the hole its final shape; the other teeth are spares and are used after the broach is reground. Broaches for external broaching (Figure 1, b) are manufactured in the shape of a rectangular bar and have cutting and finishing sections.

In addition to cutting broaches, there are burnishing broaches, which do not cut, but rather smooth and flatten metal. The flattened layer produced by such broaches has high resistance to wear. The teeth of burnishing broaches do not have cutting angles; they are sometimes positioned on the finishing section of the broach.

broach

[brōch]
(mechanical engineering)
A multiple-tooth, barlike cutting tool; the teeth are shaped to give a desired surface or contour, and cutting results from each tooth projecting farther than the preceding one.

broach

1. In quarrying, to free stone blocks from the ledge by cutting out the webbing between holes drilled close together in a row.
2. To finish a stone surface with broad diagonal parallel grooves cut by a pointed chisel.
3. A half pyramid above the corners of a square tower to provide a transition to an octagonal spire.
4. A spire sometimes springing from a tower without an intermediate parapet.
5. Any pointed ornamental structure.

broach

1. a long tapered toothed cutting tool for enlarging holes
2. a roof covering the corner triangle on the top of a square tower having an octagonal spire
3. a pin, forming part of some types of lock, that registers in the hollow bore of a key
4. a tool used for tapping casks
References in periodicals archive ?
Broach operators are now able to enter and store multiple programs for producing a family of parts--thus providing exactly the type of machining versatility that today's industrial manufacturers demand.
American Broach has invested significantly in its business over the last eight years, from machine tools to software to employees, and that investment is yielding results," said Ken Nemec, president, American Broach & Machine.
Lapointe Hudson Broach, a division of Pioneer Broach Co.
The markets and products of MHI and Federal Broach are highly complementary, with more than 95% of MHI's machine tool and cutting tool sales coming from Asia and about 80% of Federal Broach's sales emanating from North America and Europe.
At IMTS 2012, MHIA and Federal Broach will jointly propose systems capable for high-speed precision machining of workpieces, including gears.
Federal Broach headquartered in Harrison, Michigan, where they manufacture Federal Broach-brand and Detroit Broach- brand cutting tools and machines.
American Broach & Machine Company is focused on quality processes and investing in manufacturing capability in order to make the world's highest quality internal spline broach cutting tools for gears and spline parts," said Ken Nemec, president, American Broach & Machine Company.
As a leader in the manufacture of spiral gullet and button gullet broach bars, General Broach--GBC--had to take extra measures to ensure the concentration of coolant remained at the proper level to maintain a tight emulsion.
Designed specifically for the Swiss-type and gang-style lathes, the Genevieve Swiss 2160 rotary broach head eliminates the need to indicate the broach to center making setups faster and easier.
Main problems associated with turn-broach roughing of cast steel was swarf clearance, as in the early stages of the broach cut, swarf length can be 3-4 inches, unlike cast iron which chips easily.
We don't broach the subject of corporate control as we should.
Issues such as breaking bad news to a client, critizing a subordinate's work, getting a bank loan - even how to send a meal back at a restaurant and broach the subject of a prenuptial agreement to a future spouse - are addressed.