Variable File Name For Creating External Links

I am working on a research project of which details cannot be disclosed. I basically have many worksheets which each contain 3D positional data and I am plotting overlaid graphs using multiple worksheets. I have gotten them to work where I manually enter the names of the worksheets, but I am trying to use the CELL("filename") command to get the current worksheet's name, then using a substitute command to change certain fields, then I would like to use the string name created by those functions to call a global variable in another worksheet which defines a range. I will try to give an example.

Say I have 3 worksheets for arbitrary measurements:
1) filename 1mm
2) filename 2mm
3) filename 3mm

I would like to graph all 3 sets of data in worksheet "filename 1mm", using the fact that everything in the filenames are the same except for the 1/2/3mm part. I have a template of which I will be copy/pasting data from numerous data sets and then each worksheet has defined names "X_vals" and "Y_vals" which give me dynamic ranges for the data I wish to plot from that worksheet.

When I type the names manually--i.e. " 'filename 2mm'!X_vals" everything works fine, but when I try to create the exact same string dynamically using indirect/substitute/left/right etc, it does not let me do it. I am able to create a dynamic string with a range, such as " 'filename 2mm'!C10:C100" but then when I change it to " 'filename 2mm!X_vals" it just gives me #REF!.

I guess my question is just is there any way to use the indirect function to create a string name dynamically which references a defined name in another worksheet? If not possible with just simple excel functions, is there a way to do this with a macro? I am not exactly familiar with VBA in excel, though I know how to run macros.