WO2012007956A1

WO2012007956A1 - Laser fire protection system (lfps)

Info

Publication number: WO2012007956A1
Application number: PCT/IN2010/000631
Authority: WO
Inventors: Arvindbhai Lavjibhai Patel
Original assignee: Arvindbhai Lavjibhai Patel
Priority date: 2010-07-14
Filing date: 2010-09-20
Publication date: 2012-01-19

Abstract

Laser fire protection system used to prevent the diamond break due to fire on any unwanted focal point inside the diamond. Graphite layer is creates on the diamond surface before sawing process by applying high temperature of 800°c to 1000°c. Additional beam bender and camera mount assembly, is placed in the path of laser beam during the sawing process, for the quality of the laser beam remains consistent through out the process. This bender again reflects the LASER beam that passes through first beam bender and another camera mount monitors the size of the beam and it's quality by capturing the video of this beam. It continuously forwards the data to the system and system continuously analyzes the quality of more beam and side of the beam. If quality and size differ from defined value then it immediately display warning signal on the screen and stops the machine.

Description

LASER FIRE PROTECTION SYSTEM (LFPS)

Field of the Invention

The present invention relates to laser fire protection system, which is provided in the machine to prevent breakage of the diamond. Due to the crystallize structure of the diamonds, some time it is broken due to fire inside the unwanted focal point, when laser strikes on the diamond stone. Background of the Invention

For the numbers of counties in the filed of diamond manufacturing are using laser sawing method to cut the one piece diamond into two or multi piece diamonds. Laser sawing of diamonds is beginning to revolutionize the diamond-cutting industry, Not only does the laser saw offer savings in time and money, but it also enables the cutting of material virtually unworkable by conventional methods and makes available an almost limitless assortment of fancy shapes. The modern technology of the laser (light amplification by the stimulated emissions of radiation) has penetrated the ancient art of diamond cutting. The use of lasers represents one of the greatest technological advances for the diamond cutter since the advent of the conventional diamond saw in the 1930s. In the hands of a competent operator, the laser saw can save time and money, and can greatly reduce the risk associated with conventional cutting methods.

The art of laser sawing is, for the most part, a well-kept secret. Although the manufacturers of laser diamond-cutting equipment are careful about releasing statistics on the number of units currently in use in the diamond industry, unofficial sources estimate that there are approximately 15 units in the U.S. and a total of 50 united in operation worldwide. In many cases, diamond cutters with adjacent offices are not aware that their neighbors have laser facilities. In contrast to conventional cutting methods, in which the saw as well as the stone being cut move, the beam in laser sawing remains stationary; the cutter needs only to focus further into the stone as the sawing progresses. The diamond is mounted in a dop similar to those used in conventional cutting, and then placed on the x-y platform. The desired cut is preprogrammed into a computer linked to the platform; the platform then moves the diamond through the beam in a back-and-forth motion precisely as determined by the system operator.

Once the beam reaches the stone and the platform begins to move, the sawing starts. At the point where the laser beam strikes the diamond, the temperature is extremely high so, diamond may get broken, because diamond is a crystallize structure and when laser source is strikes inside any unwanted focal point then the diamond is broken or damaged. To overcome this problem, the present invention "LASER FIRE PROECTION SYSTEM (LFPS)" is invented. In the present invented system, before sawing process takes place, graphite layer is created on the diamond stone by laser beam it self. This graphic layer prevents fire to take place during sawing process.

Description of the Invention

The present invention is described with greater specific and clarity with reference to following drawings:

Fig.l represents the single and multi die fixtures Fig.2 represents the sawing fixture

Fig.3 represents the focusing mount

Fig.4 represents the laser power management system

This LASER fire protection system is provided in the machine to prevent breakage of diamond. Due to the crystallize structure of diamond, diamond may get broken due to fire inside any unwanted focal point, when the laser strikes on diamond stone. In the present invention system, before sawing process is applied to the diamond. A graphite layer is created on the diamond stone by laser beam itself. This graphite layer prevents fire to take place during the sawing process. To create such graphite layer on the diamond, very high temperature 800° C to 1000° C is applied to the diamond. Diamond is converted into the graphite at such high temperature so, this graphite layer prevents fire to take place during sawing process. This in results not only increase the productivity but also eliminates the loss of money due to breakage of diamond. In the present invention X, Y and Z axis are provided for the horizontal and vertical motion of the fixture. Stopper motors provide the motion to the axes.

As shown in Fig.2, sawing fixture is providing to hold the diamond stone during sawing process. There are two types of sawing fixture are used to hold the diamond.

1. LFPS single die sawing fixture

2. LFPS multi die sawing fixture

3. Twin side sawing fixture (TSS)

As shown in Fig.l, the diamond is fitted at the end of the axis in the sawing fixture. Single die fixture is used for one diamond at a time. Diamond is located at the end of the axis where vacuum is generated which holds the diamond. The motor attached can rotate 360 ⁰ and laser beam strikes upon the stone. This is how cutting takes place.

The multi die sawing fixture is consists of multi dies to hold multiple diamonds at once. It can hold multiple diamonds at a single time. The function of the fixture is same as single die sawing fixture but value then it immediately display warning signal on the screen and stops the machine. By this way in the present invention system, continuous quality LASER power achieved which is result increase the productivity. Summary of the Invention

In the diamond sawing process when consistent laser power is applied, due to any unwanted focal point inside the diamond, it may break the diamond. To prevent from this brakeage, by the use of present invented laser fire protection system, graphite layer is creates on the diamond surface to prevent diamond from the broken and it also eliminates the loss of money due to breakage of diamond.

Claims

LASER FIRE PROTECTION SYSTEM (LFPS) consists with single/multi die sawing fixture or TSS fixture, focusing mount and laser power management system wherein,

diamond is hold by single/multi die sawing fixture or twin side sawing fixture;

focusing mount is mounted on the Z-axis to focal the length for varying dimension of diamond stone and fixture;

additional beam bender and camera assembly is mounted in the path of laser beam where this bender again reflects the LASER beam that passes through first beam bender and another camera mount monitors that size of the beam and its quality by capturing the video of this beam;

graphite layer is create on the diamond stone before sawing process by applying very high temperature 800° C to 1000° C diamond.

LASER FIRE PROTECTION SYSTEM (LFPS) as claimed in claim 1 wherein laser power management system to maintain the quality laser power, it continuously forward the data to the system and continuously analyzes the quality of beam more and size of beam.

3. LASER FIRE PROTECTION SYSTEM (LFPS) as claimed in claim 1 and 2 wherein when quality and size is differ from the pre defined value, it display warning single and stop the machine.

4. LASER FIRE PROTECTION SYSTEM (LFPS) as claimed in claim 1 diamond is located at the end of the axis where vacuum is generated which hold the diamond. 5. LASER FIRE PROTECTION SYSTEM (LFPS) as claimed in claim 1 stepper motor is attached with the sawing fixture to rotates die at 360° and laser beam strikes upon the stone.

6. LASER FIRE PROTECTION SYSTEM (LFPS) as claimed in claim 1, wherein single die, multi die and twin side die sawing fixture are provided to hold the sawing fixture.

7. LASER FIRE PROTECTION SYSTEM (LFPS) as claimed in claim 1 and 6 wherein the TSS fixture is a fixture with multiple die that rotates two side 180°

8. LASER FIRE PROTECTION SYSTEM (LFPS) as claimed in claim 1 wherein LED holder is provided with focusing mount to ensure the better vision.