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Capital Tool Industries
CTI is a long established company producing quality Gear Cutting Tools. We specialize in the manufacture of Gear Hobs, Worm Gear Hobs, Involute Gear Cutters, Gear Shaper Cutters, Gear Shaving Cutters & all types of Milling Cutters.

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IDC-USA
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NSK Corporation
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Yaskawa America, Inc.
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Articles About generation


1 Basic Gear Generation Designing the Teeth (September/October 1991)

The finished gear engineer, the man who is prepared for all emergencies, must first of all know the basic design principles. Next he must be well versed in all sorts of calculations which come under the heading of "involute trigonometry."

2 Crowned Spur Gears: Optimal Geometry and Generation (September/October 1988)

Involute spur gears are very sensitive to gear misalignment. Misalignment will cause the shift of the bearing contact toward the edge of the gear tooth surfaces and transmission errors that increase gear noise. Many efforts have been made to improve the bearing contact of misaligned spur gears by crowning the pinion tooth surface. Wildhaber(1) had proposed various methods of crowning that can be achieved in the process of gear generation. Maag engineers have used crowning for making longitudinal corrections (Fig. 1a); modifying involute tooth profile uniformly across the face width (Fig. 1b); combining these two functions in Fig. 1c and performing topological modification (Fig. 1d) that can provide any deviation of the crowned tooth surface from a regular involute surface. (2)

3 Efficient Methods for the Synthesis of Compound Planetary Differential Gear Trains for Multiple Speed Ratio Generation (July/August 1990)

This article presents an efficient and direct method for the synthesis of compound planetary differential gear trains for the generation of specified multiple speed ratios. It is a train-value method that utilizes the train values of the integrated train components of the systems to form design equations which are solved for the tooth numbers of the gears, the number of mating gear sets and the number of external contacts in the system. Application examples, including vehicle differential transmission units, rear-end differentials with unit and fractional speed ratios, multi-input functions generators and robot wrist joints are given.

4 Solid Model Generation of Involute Cylindrical Gears (September/October 2003)

This paper presents approximate and accurate methods to generate solid models of involute cylindrical gears using Autodesk Inventor 3-D CAD software.

5 The Next Generation of Gear Specialists (January/February 1996)

AGMA has an excellent Training School for Gear Manufacturing. It's a great product providing a great service to the gear industry. Thus far we've educated 117 employees from 71 companies; students range from new hires with no experience to company presidents. Essentially every class since December, 1992, has been sold out.

6 Gear Tooth Profile Determination From Arbitrary Rack Geometry (November/December 1988)

This article describes a method of obtaining gear tooth profiles from the geometry of the rack (or hob) that is used to generate the gear. This method works for arbitrary rack geometries, including the case when only a numerical description of the rack is available. Examples of a simple rack, rack with protuberances and a hob with root chamfer are described. The application of this technique to the generation of boundary element meshes for gear tooth strength calculation and the generation of finite element models for the frictional contact analysis of gear pairs is also described.

7 Synthesis of Spiral Bevel Gears (March/April 1991)

There are different types of spiral bevel gears, based on the methods of generation of gear-tooth surfaces. A few notable ones are the Gleason's gearing, the Klingelnberg's Palloid System, and the Klingelnberg's and Oerlikon's Cyclo Palliod System. The design of each type of spiral bevel gear depends on the method of generation used. It is based on specified and detailed directions which have been worked out by the mentioned companies. However, there are some general aspects, such as the concepts of pitch cones, generating gear, and conditions of force transmissions that are common for all types of spiral bevel gears.

8 The Latest Gear Generation - Interview with Jan Klingelnberg (October 2013)

This is the first of a new series of Gear Technology profiles of individuals you should know in the gear industry.

9 Generation of Helical Gears with New Surface Topology by Application of CNC Machines (January/February 1994)

Analysis of helical involute gears by tooth contact analysis shows that such gears are very sensitive to angular misalignment leading to edge contact and the potential for high vibration. A new topology of tooth surfaces of helical gears that enables a favorable bearing contact and a reduced level of vibration is described. Methods for grinding helical gears with the new topology are proposed. A TCA program simulating the meshing and contact of helical gears with the new topology has been developed. Numerical examples that illustrate the proposed ideas are discussed.

10 Latest Generation of Quieter Plastic Gears Can Take the Heat (November/December 2005)

Ten years ago, most mainstream gear manufacturers didn't even consider plastics as an option, especially in higher power applications.

11 The New Power Generation--With All Eyes on Washington, U.S. Wind Industry Seeks Expansion (January/February 2008)

Long before oil, climate change and energy demand were making headlines in Washington, Minnesota State Auditor Rebecca Otto and her husband installed a wind energy system on their property in Minnesota.

12 Future Demands Next Generation of Standards and Practices in Gear Industry (May 2010)

Gear manufacturers are moving into an era that will see changes in both engineering practices and industry standards as new end-products evolve. Within the traditional automotive industry, carbon emission reduction legislation will drive the need for higher levels of efficiency and growth in electric and hybrid vehicles. Meanwhile, the fast growing market of wind turbines is already opening up a whole new area of potential for gearbox manufacturers, but this industry is one that will demand reliability, high levels of engineering excellence and precision manufacturing.

13 Kinematical Simulation of Face Hobbing Indexing and Tooth Surface Generation of Spiral Bevel and Hypoid Gears (January/February 2006)

In addition to the face milling system, the face hobbing process has been developed and widely employed by the gear industry. However, the mechanism of the face hobbing process is not well known.

14 Meshing of a Spiral Bevel Gear Set With 3-D Finite Element Analysis (March/April 1997)

Recent advances in spiral bevel gear geometry and finite element technology make it practical to conduct a structural analysis and analytically roll the gear set through mesh. With the advent of user-specific programming linked to 3-D solid modelers and mesh generators, model generation has become greatly automated. Contact algorithms available in general purpose finite element codes eliminate the need for the use and alignment of gap elements. Once the gear set it placed in mesh, user subroutines attached to the FE code easily roll it through mesh. The method is described in detail. Preliminary result for a gear set segment showing the progression of the contact line load is given as the gears roll through mesh.

15 Structural Analysis of Teeth With Asymmetrical Profiles (July/August 1997)

This article illustrates a structural analysis of asymmetrical teeth. This study was carried out because of the impossibility of applying traditional calculations to procedures involved in the specific case. In particular, software for the automatic generation of meshes was devised because existing software does not produce results suitable for the new geometrical model required. Having carried out the structural calculations, a comparative study of the stress fields of symmetrical and asymmetrical teeth was carried out. The structural advantages of the latter type of teeth emerged.

16 Eliot K. Buckingham (July/August 1997)

His resume reads like that of many gear engineers of his generation: the stint in the army during World War II; the break for college in the late 40s; deliberately vague descriptions of projects for the Air Force in the New Mexico desert in the early 50s; the corporate engineering jobs later on in the decade.

17 Introduction to ISO 6336 What Gear Manufacturers Need to Know (July/August 1998)

ISO 6336 Calculation of Load Capacity of Spur and Helical Gears was published in 1997 after 50 years of effort by an international committee of experts whose work spanned three generations of gear technology development. It was a difficult compromise between the existing national standards to get a single standard published which will be the basis for future work. Many of the compromises added complication to the 1987 edition of DIN 3990, which was the basic document.

18 A Huge Success (September/October 1995)

Sivyer Steel Corporation, Bettendorf, IA, an ISO-9002-certified casting specialist, is familiar with tackling tough jobs. The company has built an international reputation as a supplier of high-integrity castings, especially those which require engineering and/or full machining. Its not unusual for Sivyer's customers, especially those in the mining, recycling, power generation, valve and nuclear fields, to ask the foundry to produce a one-of-a-kind casting - often something revolutionary - but AnClyde Engineered Products' request was a special challenge, even for Sivyer.

19 No Compromising on Quality at Allison Transmission (July 2014)

Gleason 350GMS helps put higher quality, more reliable gears into its next-generation TC10 automatic transmission.

20 Cutting Hardened Gears (November/December 2002)

The need for improved power transmissions that use gears and gearboxes with smaller overall dimensions and with lower noise generation has left manufacturing engineers searching for different methods of gear processing. This search has led to the requirement of hardened gears.

21 The Math of Noncircular Gearing (July/August 2000)

Noncircular gearing is not new. There are well-documented articles covering standard and high order elliptical gears, sinusoidal gears, logarithmic spiral gears, and circular gears mounted eccentrically. What these designs have in common is a pitch curve defined by a mathematical function. This article will cover noncircular gearing with free-form pitch curves, which, of course, includes all the aforementioned functions. This article also goes into the generation of teeth on the pitch curve, which is not usually covered in the technical literature. Needless to say, all this is possible only with the help of a computer.

22 IMTS 2010 Poised for Manufacturing Resurgence (July 2010)

Manufacturing is a hot topic everywhere these days, what with economic stimulus plans targeting the struggling industry worldwide. Many hopes are tied to a manufacturing recovery to bring us further up out of the economic doldrums of 2007–2008. Most indicators show that manufacturing is climbing back, so what better time for the International Manufacturing Technology Show (IMTS) 2010 to witness first hand the next generation’s technology.

23 Gear Failure Analysis Involving Grinding Burn (January/February 2009)

When gears are case-hardened, it is known that some growth and redistribution of stresses that result in geometric distortion will occur. Aerospace gears require post case-hardening grinding of the gear teeth to achieve necessary accuracy. Tempering of the case-hardened surface, commonly known as grinding burn, occurs in the manufacturing process when control of the heat generation at the surface is lost.

24 Gleason Cutter Head Improves Tool Life and Productivity (November/December 2009)

The Pentac Plus is the latest generation of Gleason’s Pentac bevel gear cutting system. It is designed to allow much higher tool life and improved productivity, especially for cutters using multiple face blade geometry.

25 Grinding of Spur and Helical Gears (July/August 1992)

Grinding is a technique of finish-machining, utilizing an abrasive wheel. The rotating abrasive wheel, which id generally of special shape or form, when made to bear against a cylindrical shaped workpiece, under a set of specific geometrical relationships, will produce a precision spur or helical gear. In most instances the workpiece will already have gear teeth cut on it by a primary process, such as hobbing or shaping. There are essentially two techniques for grinding gears: form and generation. The basic principles of these techniques, with their advantages and disadvantages, are presented in this section.

26 Pitting and Bending Fatigue Evaluations of a New Case-Carburized Gear Steel (March/April 2008)

This study quantified the performance of a new alloy and has provided guidance for the design and development of next-generation gear steels.

27 Brick by Brick (September 2011)

Lego inspires the next generation of engineers, manufacturers and scientists.

28 Estimating Hobbing Times (July/August 1989)

Hobbing is a continuous gear generation process widely used in the industry for high or low volume production of external cylindrical gears. Depending on the tooth size, gears and splines are hobbed in a single pass or in a two-pass cycle consisting of a roughing cut followed by a finishing cut. State-of-the-art hobbing machines have the capability to vary cutting parameters between first and second cut so that a different formula is used to calculate cycle times for single-cut and double-cut hobbing.

29 Hard Finishing and Fine Finishing Part 1 (September/October 1989)

Profitable hard machining of tooth flanks in mass production has now become possible thanks to a number of newly developed production methods. As used so far, the advantages of hard machining over green shaving or rolling are the elaborately modified tooth flanks are produced with a scatter of close manufacturing tolerances. Apart from an increase of load capacity, the chief aim is to solve the complex problem of reducing the noise generation by load-conditioned kinematic modifications of the tooth mesh. In Part II, we shall deal with operating sequences and machining results and with gear noise problems.

30 More IMTS Stuff (September/October 2002)

Student Summit Introduces Next Generation to Manufacturing The IMTS 2002 Show offers an opportunity for students, ranging from grade school to college, to take part in the exhibition.

31 IMTS 2004: Recovery in the Gear Pavilion (November/December 2004)

Tom Lang liked what he saw in the Gear Generation Pavilion at IMTS 2004. Standing in his booth, Kapp Technologies’ vice president/general manager talked with many attendees during the show and afterward said: “We had an increase of both quality and quantity of visitors.”

News Items About generation

1 Mahr Introduces New Generation of Digital Calipers (October 14, 2010)
Mahr Federal has introduced a new generation of its popular line of MarCal digital calipers. Included are a number of innovations, such a... Read News

2 Mahr Introduces Next Generation Indicator Line (August 15, 2011)
Mahr Federal has introduced the next generation of its well-established µMaxµm line of digital indicators. In addition to the... Read News

3 Seco Offers New Generation of Tip Drills (January 4, 2012)
Seco's new generation of Crownloc Plus exchangeable tip drills takes holemaking to the next level by increasing output and decreasing... Read News

4 Hexagon Metrology Offers Next Generation of Romer Absolute Arm (April 8, 2014)
Hexagon Metrology recently announced the next generation of the Romer Absolute Arm. The enhanced portable measuring arm features optimized ergonomics... Read News

5 Sandvik Introduces Next Generation of Insert Grades (May 1, 2006)
The GC1030, GC4240 and GC4225 from Sandvik Coromant were designed to enhance productivity in steel milling operations. The GC1030 and ... Read News

6 Zoller Introduces Next Generation Tool Presetter (March 21, 2014)
The new Smile combines decades of experience and user-oriented development with typical Zoller innovation. The state-of-the-art Zoller myTouch... Read News

7 Seco Releases Next Generation Minimaster (September 30, 2011)
Seco introduced its original Minimaster line of end mills with replaceable carbide inserts nearly 25 years ago. Today, the company is pre... Read News

8 Scott Knoy Receives AGMA Next Generation Award (April 28, 2014)
German Machine Tools of America (GMTA, formerly American Wera) proudly announces the winning of the prestigious Next Generation award... Read News

9 Mori Seiki/DMG Launch Next-Generation of Machine Tools (December 16, 2011)
Mori Seiki has started taking orders for the Ultrasonic 65 monoBLOCK equipped with ultrasonic machining functions and the Lasertec 65 Sha... Read News

10 Okuma Introduces Next Generation Wheel Cell (February 15, 2013)
Okuma America Corporation recently announced the launch of the new All-Okuma wheel cell. The new wheel cell includes the new MB-56VA-AW a... Read News