Gökçe Dil 3. week unanswered

Standard part: A standard part ia a member of a class of parts that has a generic function and is manufactured routinely without reference to its use in any particular product. Examples of standard parts are screws, blots, rivets, buttons, gears, springs etc.

Design for manufacturing: a structured approach, Corrado Poli, pg. 2

Onur OZAYDIN_3rd_Week_UNANSWERED_TERMS

@ Stable Schedule

ANSWER: FOR JIT TO BE SUCCESSFUL, WORK MUST FLOW SMOOTHLY WITH MINIMAL PERTURBATION FROM NORMAL OPERATIONS. PERTURBATIONS REQUIRE CHANGES IN OPERATING PROCEDURES-INCREASES AND DECREASES IN PRODUCTION RATE, UNSCHEDULED SETUPS, VARIATIONS FROM THE REGULAR WORK ROUTINE, AND OTHER EXCEPTIONS. PERTURBATIONS IN DOWNSTREAM OPERATIONS (i.e. FINAL ASSEMBLY) TEND TO BE AMPLIFIED IN UPSTREAM OPERATIONS (i.e. PARTS FEEDING) A MASTER PRODUCTION SCHEDULE THAT REMAINS RELATIVELY CONSTANT OVER TIME IS ONE WAY OF ACHIEVING SMOOTH WORK FLOW AND MINIMIZING DISTURBANCES AND CHANGES IN PRODUCTION.

(REF: FUNDAMENTALS OF MODERN MANUFACTURING, GROOVER M. P., JOHN WILEY & SONS 2007, PAGE 965)

@ Production and Inventory Control (PIC)

ANSWER: A COMPUTER BASED PIC SYSTEM IS DESIGNED TO OPTIMIZE THE RESOURCES OF THE COMPANY (i.e. THE FINANCIAL RESOURCES, THE MATERIALS, THE WORK LOADS) FOR A GIVEN REQUIRED VOLUME OF PRODUCTION. IT TAKES INTO ACCOUNT THE PLANNING OF THE RESOURCES REQUIRED FOR THE PRODUCTION PROCESS AND THE MONITORS THE WAY IT IS CARRIED OUT. IT INCLUDES A VAST RANGE OF FUNCTIONS, FROM THE ELABORATION OF MANUFACTURING PROGRAMMES TO THE MONITORING OF WORKSHOP OPERATIONS AND COVERS ALL THE COORDINATING ACTIVITIES SUCH AS THE DEFINITION OF THE PRODUCT STRUCTURES (TECHNICAL DATABASE OF THE BILLS OF MATERIALS AND MANUFACTURING SCHEDULES), STOCK CONTROL, MRP CALCULATIONS, PURCHASING, WORKSHOP SCHEDULING etc.

(REF: PRINCIPLES OF CIM, JEAN-BAPTISTE WALDNER, WILEY 1992, PAGE 162)

503101307 Onur OZAYDIN

Buğra Cengiz 030060178 3.week Term 4

 

• Multiple process controlstations located throuhout the plant to control of the indivual loops and devices of the process

• A central control room equipped with operator stations, where supervisory control of the plant is accomplished.

Groover, Automation, Production Systems and CIM. P.102

With the development of the microprocessor, it became feasible to connect multiple microcomputers together to share and distribute the process control workload, The term distributed control system (DCS) is uded to describe such a configuration. which consists of the following components and features:

• Local operator stations ditributed throughout the plant. This provides the DCS with redundancy. If a control failure occurs in the central control room. the local operator stations take over the central control functions. If a local operator station fails, the

other local operator stations assume the functions of the failed station.

• All process and operator stations interact with each other by means of a communications

network, or a data highway as it is often called

Gökhan Güngör (3rd week)

1- Make or Buy
2- Life Expectancy
3- Use Value
4- Esteem Value (Prestige Value)
5- Recycling
6- Green Engineering
7- Resolution
8- Rule of 10
9- Hundred Percent Inspection
10- Acceptance Sampling

Evrim Berk 030060161 3rd Week

Depth Of Cut: The depth of cut is determined by the width of the chip. During the roughing operation, the depth of cut is usually much more greater than that of the finishing operation.. For turning, it is one-half the difference between the inner and the outer diameters of the workpiece.

(Computer Aided Manufacturing, Chang T., Wysk R.A., Wang H., 2nd edition, 1998, Page: 141)

Geometric Transformations: In order to manipulate a modeling object in the space, geometric transformations are used. There are two kinds of geometric transformation, that of transforming the object and transforming the coordinate system. First one moves the object within the existing coordinate frame, such as moving the primitives in solid modelling. Second one moves the coordinate system, and then the object is viewed from the new coordinate frame such as finding a better view or doing a 2-D orthogonal projection. The transformation methods are the same for both cases, except the signs are changed.

(Computer Aided Manufacturing, Chang T., Wysk R.A., Wang H., 2nd edition, 1998, Page: 106)

Resolution: Resolution is also called sensivity. It is the smallest increment of motion of the machine components.

(Manufacturing Engineering and Technology, Kalpakjian S., Schmid S.R., 5th edition, Page: 1159)

Push System: In traditional manufacturing, the parts are made in batches, placed in inventory, and used whenever necessary. This approach is known as a push system, meaning that parts are made according to a schedule and are placed in inventory to be used whenever they are needed.

(Manufacturing Engineering and Technology, Kalpakjian S., Schmid S.R., 5th edition, Page: 1226)

Gökçe Dil 3. week

1.Annealing
2.Brinell Hardness
3.Final Product
4.Raw material
5.Semifinished part
6.Innovation
7.Custom part
8.standard parts
9.Bulk deformation
10.Sintering

Burcu Atay, 140060029, 3rd Week

Feature-Based Design

The consept of feature-based design was advanced as an attempt to simplify mechanical process design as an extension of CAD. In this approach, a mechanical design consists of a collection of standard geometric features, accompanied by standard processes to create these features. The list of such features includes prismatic shapes, cylinders, cones, slots, holes, rounds, fillets, etc. The potential of this approach was found to be limited since in many situations it is difficult, if not impossible, to describe a mechanical design in terms of a limited set of standard geometric features.
(Dorf, R.C., Kusiak, A., Handbook of Design, Manufacturing and Automation, 1994, John Wiley & Sons, Inc.,pg. 124-125)

Generative Process Planning (GPP)

GENPLAN is an acronym for GENerative process PLANning system, developed ar Lockheed, Georgia (Tulkoff, 1981). It is one of the most sophisticated generative systems. It uses a Group Technology-based coding scheme that covers both part geometry and process variables to generate comprehensive operations. GENPLAN is oriented towards a spesific environment. The initial GENPLAN was developed in 1976 based on CAM-I's CAPP system. At present, it has been split into two parts, Fabrication GENPLAN and Assembly GENPLAN. GENPLAN is being integrated with other companies's systems to increase the efficiency of the enterprise, such as interfacing it with a management decision support system, an automatic shop loading and scheduling system, and a tool order processing and accountability system.
(Zhang, H-C, Alting, L., Computerized manufacturing process planning systems, 1994,Chapman & Hall,1st Edition, pg. 210-211)

Inspection Planning

A popular manufacturing development is error free six-sigma manufacturing which seeks to ensure that bad parts are almost never produces. Part inspection is vital for this goal not only to discard bad parts but also to provide closed loop control on the quality of the products beibg produced. Consequently, inspection planning is treated as an integral part of manufacturing planning. Several research problems remain unresolved in inspection planning. To decide which problem to concentrate on, it should focus on the product characteristics with the greatest influence on a product's performance. At the same time, it should avoid the cost of inspecting characteristics with little significance. Inspection planning is deeply involved with such product modelling issues as representations of dimensions and tolerances, assembly relationships, and finally, with functions and behaviours of physical configurations.
(Nasr, E.A., Kamrani, A.K., Computer-based design and manufacturing: an information-based approach, 2007, Springer, pg.77)

Annealing

Glass products usually have undesirable şnternal stresses after forming, which reduce their strength. Annealing is done to retrieve these stresses; the treatment therefore has the same function in glassworking as it does in metalworking. Annealing involves heating the glass to an elevated temperature and holding it for a certain period to eliminate stresses and temperature gradients; then slowly cooling the glass to supress stress formation, followed by more rapid cooling to room temperatyre. Common annealing temperatures are around 500°C (900°F). The lenght of time product is held at the temperature, as well as the heating and cooling rates during the cycle, depend on thickness of the glass, the usual rule being that the required annealing time varies with the square of thickness.

Annealing in modern glass factories is performed in tunnel-like furnaces, called lehrs, in which the produxtss flow slowly through the hot chamber on conveyors. Burners are located only at the front end of the chamber, so that the glass experiences the required heating and cooling cycle.

(Groover, M.P., Fundamentals of modern manufacturing : materials, processes, and systems, Wiley Internatiol, 2002, 2nd Edition, pg. 253)

Onur OZAYDIN___3rd Week

1-Varient system

2-Hierarchical Coding

3-Polycodes

4-Life cycle engineering

5-Capital Cost

6-Indirect-labor cost

7- Computer-aided sorfware engineering (CASE)

8-Stable Schedule (About JIT)

9- Fourth-Generation Language (4GL)

10-Production and Inventory Control (PIC)

503101307 ONUR ÖZAYDIN

Gani Can Öz - 3rd Week

1 Bar Code

2 Optical Detectors

3 Vision Sensors

4 Access Control Protocol

5 Database Management System

6 Shot Peening

7 Finite Difference Method

8 Paperless Design

9 Manufacturing Properities of Materials

10 Green Desgin

Ozlem Salman (3rd week)

1 CNC Lathe

2 CNC Milling

3 CNC Welding

4 Cutting tool

5 Spindle

6 Turret

7 Chuck

8 Cutting speed

9 Feed rate

10 Depth of cut

A. Selim PARLAKYİĞİT - 3rd Week

1. Statistical Quality Control
2. AS/RS
3. Sensor Fusion
4. Product Liability
5. Preproduction Prototypes
6. Generative System (in CAPP System)
7. The multiClass System
8. The KK-3 System
9. Fixed and Variable-Sequence robots
10.Adjustable-Force Clamping