There are many different types of hinges in use today. Every brand/model of range or oven seems to use a different hinge design. Hinges get buckled, twisted and noisy and require replacement.
My video on typical ways to repair oven hinges can be found in my "Oven Video and Manual Section". Following are various hinge lock mechanisms that make replacement easier:
Temporary Lock Pin - Any Screw or a Tiny Screw Driver Will Do