Materials for Spring

From M
       Material for Helical Springs:         Authors: R.S. KHURMI    J.K. GUPTA

The material of the spring should have high fatigue strength, high ductility, high resilience and
it should be creep resistant. It largely depends upon the service for which they are used i.e. severe
service, average service or light service.

Severe service means rapid continuous loading where the ratio of minimum to maximum
load (or stress) is one-half or less, as in automotive valve springs.
 Average service includes the same stress range as in severe service but with only intermittent
operation, as in engine governor springs and automobile suspension springs.

Light service includes springs subjected to loads that are static or very infrequently varied, as in
safety valve springs.
The springs are mostly made from oil-tempered carbon steel wires containing 0.60 to 0.70 per
cent carbon and 0.60 to 1.0 per cent manganese. Music wire is used for small springs. Non-ferrous
materials like phosphor bronze, beryllium copper, monel metal, brass etc., may be used in special
cases to increase fatigue resistance, temperature resistance and corrosion resistance.
DESIGN OF MACHINE ELEMENTS, DIPLOMA MACHINE DESIGN

Engineering Applications of Spring

From M
Source:- Machine Design Authors:- R.S:khurmi, J.K:gupta
1. To cushion, absorb or control energy due to either
shock or vibration as in car springs, railway
buffers, air-craft landing gears, shock absorbers
and vibration dampers.
2. To apply forces, as in brakes, clutches and springloaded
valves.
3. To control motion by maintaining contact between
two elements as in cams and followers.
4. To measure forces, as in spring balances and
engine indicators.
5. To store energy, as in watches, toys, etc.

GOVERNMENT OF KARNATAKA DEPARTMENT OF TECHNICAL EDUCATION BOARD OF TECHNICAL EXAMINATIONS DIPLOMA ANNUAL (SUPPLY/SEMESTER SCHEME) THEORY EXAMINATIONS -NOV 2011 PROVISIONAL TIME-TABLE

             GOVERNMENT OF KARNATAKA  DEPARTMENT OF TECHNICAL EDUCATION 
                                  BOARD OF TECHNICAL EXAMINATIONS
             DIPLOMA ANNUAL (SUPPLY/SEMESTER SCHEME) THEORY   EXAMINATIONS -NOV   2011
                                    PROVISIONAL   TIME-TABLE

COURSE    :           9ME        MECHANICAL ENGG. (GENERAL)                                   (NEW SCHEME)

YR     SUB         QPCODE                                         SUBJECT NAME                                              DAY                DATE                        TIME


1       01          9CP01E       ENGLISH COMMUNICATION                                                     MON    28/11/2011              09 -         12

1       02          9SC01M      APPLIED MATHEMATICS-I                                                          TUE    29/11/2011              09 -         12

1       03          9EE01E       BASIC ELECTRICAL & ELECTRONICS ENGG                        FRI     02/12/2011              09 -         12

1       04          9ME01D      ENGG GRAPHICS (CONVENTIONAL)                                        WED    07/12/2011              09 -         13

2       02          9SC03S        APPLIED SCIENCE                                                                            FRI     25/11/2011              09 -         12

2       03          9ME02M     MECHANICAL ENGG. SCIENCE                                                THUR   08/12/2011              09 -         12

2       01          9SC02M      APPLIED MATHEMATICS-II                                                        SUN    11/12/2011              09 -         12

3       01          9ME31         ENGINEERING MECHANICS & S.O.M                                       SAT    26/11/2011              09 -         12

3       03          9ME33         MANUFACTURING TECHOLOGY-I                                           MON    05/12/2011              09 -         12

3       04          9ME34         MECHANICAL MEASURMENTS & METROLOGY                  FRI     09/12/2011              09 -         12

3       02          9ME32         FLUID MECHANICS & MACHINARY                                       MON    12/12/2011              09 -         12

4       01          9ME41         THEORY OF MACHINES                                                                 FRI     25/11/2011              14 -         17

4       02          9ME42         THERMAL ENGINEERING-I                                                         TUE    29/11/2011              14 -         17

4       03          9ME43         MANUFACTURING TECHNOLOGY-II                                        FRI     02/12/2011              14 -         17

4       04          9ME44         FLUID POWER ENGINEERING                                                    WED    07/12/2011              14 -         17

5       04          9ME54         MECHATRONICS                                                                              SAT    26/11/2011              14 -         17

5       02          9ME52         THERMAL ENGINEERING-II                                                       MON    28/11/2011              14 -         17

5       03          9ME53         D/N   OF MACHINE ELEMENTS                                                   SAT    03/12/2011              14 -         17

5          01        9ME51            BASIC MGMT SKILL & INDIAN CONSTN                SUN     11/12/2011      14        -           17
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