Jig And Fixtures.pptx

7/26/2019 Jig And Fixtures.pptx

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Jig and

Fixtures


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Design Guidelines for Manual Assembly

Minimise the number of standard different parts use standard

parts.

minimise the number of parts.

avoid or minimise part orientation during assembly (i.e. prefer

symmetrical parts).

prefer easily handled parts that do not tangle or nest ithin one

another.


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!educes " eliminates the efforts of mar#ing$ measuring and setting

of or#piece on a machine

!educes product cycle time.

Mass production

Assembly operation becomes easy$

%o re&ection

'ncreases production capacity.

or#ing by more than one tool on the same or#piece is possible.

peed$ feed rate and depth of cut can be set to higher values due to

rigidity of clamping.

*perators or#ing becomes comfortable

emi+s#illed operators can be assigned the or#.

,o need to e-amine the uality of product

Advantages of /igs and 0i-tures


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tudy of or#piece and finished component si1e and geometry.

2ype and capacity of the machine$ its e-tent of automation.

3rovision of locating devices in the machine.

Available clamping arrangements in the machine.

Available inde-ing devices$ their accuracy.

4valuation of variability in the performance results of the machine.

!igidity and of the machine tool under consideration.

tudy of e&ecting devices$ safety devices$ etc.

!euired level of the accuracy

!euirements


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Jig and Fixture specifcation or locating


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a L R

8+8

9+9 :;+;

b L R

8+8

9+9 :

;+; :


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c L R

8+8 :

9+9 :;+; :

d L R

8+8 : :

9+9 :

;+; :


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e L R

8+8 : :

9+9 : :

;+; :

f L R

8+8 : :9+9 : :

;+; : :


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Machining a or#piece


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Machining a or#piece


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!edundancy

% t


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%ocators

hape

0lat


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0lat %ocator

5 li d i l % t


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5ylindrical %ocator

5 i l % t


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5onical %ocator


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0acing And tops

Doels and spigot


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Doels and spigot


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5lamping

hould rigidly hold the or#piece.2he or#piece being clamped should not be damaged due to clamping pressure

5lamping pressure should be enough to over come the operating pressure

5lamping device should be capable to be unaffected by the vibrations

hould also be user friendly$5lamping and releasing should be easy and less time consuming.

Maintenance should also be easy.

5lamping pressure should be directed toards the support surfaces

5lamping faces should be hardened by proper treatments

5lamping *peration


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5lamping *peration

cre 5lamping


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cre 5lamping

6oo# 5lamping


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6oo# 5lamping

7ridge 5lamping


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7ridge 5lamping

4dge 5lamping


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4dge 5lamping

6eel 5lamping


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6eel 5lamping


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%atch 5lamping


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%atch 5lamping

6inged 5lamping


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6inged 5lamping

edge 5lamping


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edge 5lamping


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edge 5lamp

=uic# acting 5lamp


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=uic# acting ,ut


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5am operated ,ut


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2oggle operated ,ut


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2oggle operated ,ut


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2oggle operated ,ut


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2oggle operated ,ut


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3oer 5lamp


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3oer 5lamp


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2ypes of 7ush


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2ypes of 7ush


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5lassification of /ig

2emplate /ig

3late /ig

5hannel /ig

l ifi i f i


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5hannel and %eaf /ig

Diameter /ig

5lassification of /ig


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Angle 3late2urn *ver 3late


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7o- /ig

%atch type /ig


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andich type /ig


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'nde- /ig


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6o >>>


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6o >>>


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Modular Fixture


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Jig And Fixtures.pptx

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