Hemant Tools - Pune Team

HEMANT TOOLS PVT. LTD. - Pune
PLOT NO. BG/SEI/10/5, NEAR PHILIPS,
ABOVE STANDARD MACHINE TOOLS,
BHOSARI , PUNE-411026
Ph No-020-27129013/65103482

Email ID – pune@hemanttools.co.in , vp@hemanttools.co.in

1) Ms Shrutica - Office Co-Ordianator. -Ph No-020-27129013/65103482

2) Mr. Shailesh - accounts.pune@hemanttools.co.in - 9225625895

G76 - Thread Turning Programe

G76 Programming Example
The G76 requires two (2) lines to give all the information needed to perform the
cycle. It may seem complicated at first but the information is just a numerical description
of the thread. We’ll start by looking at the first (1st) line of the cycle one (1) address at a
time.
LINE #1
G76 P _1 _ _2 _ _ 3_ Q _____ R _____
P has six (6) digits. They are used in three (3) groups of two (2) digits each. The
first group marked #1 indicates the number of finish pass you want to take. All of the
finish stock is taken on the first pass and the remaining passes will all be spring passes
(also called dead passes or pressure passes). In order to take one finish pass and two
spring passes the first two digits of address P will be 03.
The second group of three digits is called the thread pull out. This makes the tool
pull out of the thread, at a 45-degree angle, before reaching the programmed end point.
You use this to prevent a sharp groove at the back of the thread. When you have a thread
relief groove already machined on the part you may not need to use this. In that case the
digits will be 00. In order to pull out ½ thread pitch before the end you would make the
digits 05, to pull out a full thread before the number would be 10.
The last group marked 03 is the thread angle designation. It is used to control the
in feed angle as each pass is taken. This feature keeps the force of cut directed on the
leading edge of the insert. The standard angle in the USA is 60 degree so the last two
digits would be 60. Only the following numbers can be used in this cycle. 80, 60, 55, 30,
29 and 00. You can use different numbers with different thread to help eliminate trouble.
One method would be to use the number 55 with a 60-degree thread. This will put most
of the load on the front of the insert but will also put some on the backside for support.
To obtain the following results the address P will be as such. 1 finish pass 1
spring pass, pull out ½ thread before the end of the thread and a standard 60-degree
thread. P will look like this P020560.
The next address is Q, this is the minimum depth of cut that the cycle will take.
The control calculates its passes and reduces the depth for each pass. With out a
minimum you would end up only taking extremely small amount at the bottom of the
thread. Q is a radial amount and is modal. It remains in effect until changed.
The next address, R, is the finish stock to be left for the finish pass to take. This
will allow a consistent amount of stock to be taken during finishing. All of the stock will
be taken with the first pass and all remaining passes will be spring passes.
Lets look at the first line complete with .005” finish stock and .001” minimum
depth of cut.
G76 P020560 Q10 R50;
That is everything that should go on the first line. You need to end the first line
with an EOB to start the second line. The second line will start with the code G76 just
like the first line. You may also notice that most of the addresses are the same as the first
line. Not to worry, the presence of X and Z tell the control that the address is the same
but the meaning is different.
X is the first address that we come to. It designates the finished diameter of the
thread. This would be the minor diameter for an O/D thread and the major diameter for
an I/D thread. You must take into account that the insert will have a radius put on it from
the carbide manufacturer.
Z is the next address and is the finished Z position at the end of the thread. This is
the point farthest from the start point. You must take into account the acceleration and
deceleration of the axis. This means that you must start the thread about one or two
threads in front of the actual start. You must feed past the required end point by ½ to 1
thread.
The P address is the thread height on one side. You can get this information from
the machineries handbook or other such source. This is measured from the major to
minor diameter on one side only.
Q is the depth of cut on the first pass. The control uses this together with P to
determine the total number of passes it will take. The first pass will always be the deepest
because there is the least amount of tool pressure. From the first pass on the depth of cut
will be less and less each consecutive pass.
R is the amount of taper for taper threads. It is taken as a radial measurement and
the direction is critical. The direction is determined by moving from the start point to the
end point. This is only used for taper threads and is zero or completely omitted if not
needed.
F is the thread lead or distance per revolution between each thread. This is
required to cut the proper thread.
All other rules of threading applied to this cycle, they are as follows.
1) You must be in G97 mode
2) You must maintain the same Z start position
3) You must start your tool clear of the part in X and Z
4) You must start the thread at least one to two threads in front of part
5) You must finish at least ½ to 1 thread after your full thread requirement
6) To recut a thread you cannot change spindle speed, Z start position, Z offset or
use a different tool without risk of destroying the thread.
The finished cycle may look like this:
G00 G97 X2.0 Z.2 S500 M03;
G76 P020560 Q10 R50;
G76 X1.4 Z-1.0 P500 Q100 R0 F.1;
G00 X CLEAR Z CLEAR.

Source - Internet

Higbee Cut /Thread - Blunt Cut - Blunt Thread

I will try my best to explain how it is cut.First what you want to acheive is to remove the part of the thread which is usually a small fin on the turned 45 degree angle portion of the part blank up to where it is a full profile 60 degree thread form.To do this you use a grooving tool after you are done with the threading cycle. First off you must calibrate your threading and grooving tools to the face of the part (or zero.This is where an important trick lies hidden. The center or tip of the threading tip has to be calibrated so it is equal to the leading edge of the groove tool and the groove insert must be as wide or wider than the base of the thread form (an 1/8" wide insert will work up to 8 pitch. etc) Lets say you are doing 10 pitch threads 1" thread length. Now with your regular threading cycle when you program your length you will get 1 full inch of thread and your first full thread length will be z-.100" (a starting length to be deburred) Now program your grooving tool(also in the same threading cycle as used to thread with) to a depth of z-.100" and you are starting to get a deburred thread. You will only need a couple of deburring passes to remove the burr (so play with the starting x value). But there is more to explain !! Spindle rpm and the machines rapid traverse rate will determine the amount of angle of ramp on the deburred thread. The machines rapid rate will stay constant so for a squarer ramp run slower rpms and a tapered ramp more rpms. Only one more tip if after calibrating the tools you have to adjust the z length of cut you must offset the z length equally on both tools.

Not an easy operation to describe with just words and no pictures.We normally leave a 45 plus a little bit of the minor diameter to the + side of the start thread but the higbee cut looks WAY better. might be a tricky deal on a manual lathe with no stop mechanism but Looks like cake on cnc. I looked around the shop and found a coupler that shows exactly what it should look like.Now ..... if I can just make this link work!! http://photos.msn.com/myfiles/folderview.aspx?Folder=4gPozhciq6ZTdypEPFXEQi ctJ*RhGuXgXweAIQIykiw%24 (http://photos.msn.com/myfiles/folderview.aspx?Folder=4gPozhciq6ZTdypEPFXEQictJ*R hGuXgXweAIQIykiw%24)
I have found the G32 threading cycle to be perfect for stuff like this. G32 allows you to control the tool anyway you want to under a threading feed. In the manual for my Haas SL-30 the example is a continuous thread that goes from straight to tapered, then back to straight (I'd be interested to see the nut for this screw). With G32 you can change the vary the pitch while threading. I can't think of an application for this, but it might come in handy sometime. We use this cycle all the time for higby ends, and for taking the spring out of long threaded parts. In other words, you can program a thread that moves the tool into the piece at a variable taper rate to compensate for deflection.

Source - Internet.

Mitutoyo

MITUTOYO - Measuring Instruments
MITUTOYO is the undisputed leader in Measuring and Metrological Instruments World wide..Mitutoyo Products are renowned internationally for their precision and accuracy... Mitutoyo is known world over for their variety and accuracy of measuring instruments and maintain the widest range of Mechanical ,Digital and Electronic instruments for final inspection..With continual development and innovation the large spectrum of products are designed to cater to all kinds and sizes of industries , at every stage of ProductionFor more info click here

Hemant Tools

http://www.hemanttools.com

HistoryThe firm was established in 1954 known as Hemant Tools Trading Co. a family managed organization. In the course of time Two more firms were added Ms Kantilal Keshavalal in 1965 and Tools & Gauges in 1979.All the companies were merged in 1989 for making a consolidated effort, for a planned growth and Hemant Tools Pvt. Ltd. was formed.The company was formed in the heart of the hardware market [ Nagdevi] with only a meager staff of 3. The Business at that time was only for Hand tools and Garage tools. Hemant Tools has flourished and now is One of the Biggest Companies in the Marketing of cutting Tools and Measuring Instruments in India. Hemant Tools now has Branch Offices at Pune, Banglore, Coimbatore and has 40 engineers under its wings in other major industrial cities. Reflecting this success and growth The Company Head Office too has now relocated from Nagdevi to Worli.
Business ConceptHemant Tools markets High Quality Products which contribute in giving Innovative solutions to our clients and thereby increasing their productivity and profits. The marketing policy of Hemant Tools is based on the following core values: Technical Support , Quality Service , Team spirit.
In to the FutureHemant Tools's success and growth continues as a result of giving Quality service and a desire to give the customer innovative tooling solutions.To take the Engineering industries in India technologically forward by introducing them to the latest tooling innovations in the world.
CEO Message
A voyage of 55 years and we sail as a young and dynamic organisation looking ahead to cover the whole of India with global connections. Accompanied with the goal of growth we strive to achieve it with our values and ethical working.."Hemant Tools has abided by having a Motto "Keeping Customers First" .. We strive to give Quality Solutions and Quality Service to customers Nation wide"

Vardex

VARGUS - Thread Turning and Thread Milling Tools
VARGUS Vargus is a world-leading manufacturer of high-quality cutting and deburring tools for the metals and plastics industry.Established in 1960 in Nahariya, Israel, VARGUS is the tooling division of the NEUMO Ehrenberg Group, one of Europe's largest privately owned manufacturers and distributors of stainless steel products and metal cutting tools.This tradition of innovation continues with industry-leading solutions from the company's two best known product lines - VARDEX threading solutions and SHAVIV hand-deburring solutions.Today VARDEX is the undisputed market leading threading program, with tens of thousands of thread turning and thread milling tooling solutions, available from stock or tailor-made special tools. VARGUS also makes the MINIPRO line of miniature tooling for machining small-diameter parts, and a range of cutting tools for boring, groove turning and milling applicationsThe VARGUS Product Line is mainly divided into 3 main Product lines.For more info click here
Thread TurningThread Turning - Vargus was the first company to produce the first Triangular Lay down Threading Insert....Vargus Threading Inserts are precision Ground Inserts as compared to others who have only Sintered Inserts... This gives an out and out advantage in performance and consistency... VARDEX has the largest variety of Threading Inserts as Standard Catalogue tools ranging from ISO , ACME , TR , API , BUTRESS ,HUGHES etc.... Vardex is also the leader in making Special Threads as per the customers Requirement...
VARGUS now is the Only Supplier WORLD WIDE to devlop the New Patented Revalation in Threading ... Vardex has 6 Edge Threading Insert V6...This is the proof of the continuous R and D and the hunger to be the Market Leaders in the Threading Technology.
Thread Milling Vargus - #1 in Thread Milling!Vargus offers the most comprehensive Thread Milling solutions in the industry.
VARGUS thread milling carbide cutting tool system has been recognized as the industry standard since its initial patented "trapezoidal" indexable system design was introduced.
As CNC technology for milling threads races forward, and as thread milling becomes ever more popular as an excellent solution for manufacturing threads of many types, Vargus continues to offer new and updated solutions to the machining specialist.The new MITM Thread Milling is a boon to customers looking for Cycle time Reduction...
Solid Thread MillingVARGUS Also has a Complete Wide Range of SOLID CARBIDE THREAD MILLS... Starting from M 1.4 The Solid Carbide ranges as under Solid Carbide Stright Flute Thread Mills Helical Thread Mills Helicool Thread Mills [thru coolant] Millipro Thread Mills [FOR SMALL DIA] Deep Hole Thread MillsFor more info click here
MiniPro - Turning Tools for Small BoresAs the world progresses to miniaturization, and the parts to be machined are getting smaller and smaller, the machinist is forced to find specialty tools and expert solutions to meet this growing challenge.Together with shrinking tolerances, the requirement for repeatability and indexability increase exponentially. Having the right tools is an absolute must.Whether you have to thread, groove or bore, the Vargus MiniPro line provides you with those perfect tools to get the job done, perfectly.., the first time.The Vargus MiniPro line was designed to provide an answer to nearly every machining operation performed on miniature, high-precision components. MiniPro includes a wide-range of both indexable and solid carbide solutions for threading, grooving or boring holes down to 2mm diameter in a wide range of materials.
MicroScopeAs This comprehensive line of solid carbide Micro Tools is the newest addition to the MiniPro family of products. Vargus, a pioneer of solid carbide miniature tooling systems, designed MicroScope with an improved design for ease of use, higher precision, and maximum repeatability. MiniPro MicroScope is an improved, new generation 1-sided tool which joins the unique-design and economical 2-sided Micro line for a complete solution to threading, boring, round and square grooving, face-turning of holes down to 2 mm in diameter. Ask for the NEW MicroScope catalog or download here