Exam Point of view:- The clearance formula with shear stress (tao) is a material strength dependent formula, so no need to multiply with thickness as far as exams are concerned. (as you would be provided only one of these two not both if you are to find clearance) (only if comparative clearance is to be checked both tao & thickness would be provided in question) Industrial Practical Approach: - While, practically in mfg. industries the material of the sheet is known and we don't waste time to calculate by shear force as shear stress value is unknown and cannot perform testing of the material so there we use the percentage rule of thickness for that particular as shown in video for C.I, M.S. etc. the percentage to be taken may depend on its constituent concentration. The dimensions obtained by percentage rule are a bit bigger than the one by shear stress formula to always be on a safer side. All industries have a chart/table of clearance values & % of thickness prepared based on past experiences for the materials they generally work with. Hope it clears your concept.👍
Actually the % of thickness as I mentioned is not some calculative method but one based on experience from trial & error. It depends on the material to be press-worked and the thickness itself. But In most cases it can range from 0.15% to a 20% maximum. Based on my observations from different workshops. But it can vary.
Kindly watch the lecture in 720p. The words will be readable. Or you can just download the whole PPT for reference from the link provided in the video description of the Press Tools - 6
you can either switch to 480p or higher for better visibility of font or Download the PPT itself for reference and edit as per your liking. The download link is in video description.
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Good knowledge of press tool.I hope to ask about the equation of clearance C=0.0032*tao^0.5 is multiplied by Thickness or no.
Exam Point of view:-
The clearance formula with shear stress (tao) is a material strength dependent formula, so no need to multiply with thickness as far as exams are concerned. (as you would be provided only one of these two not both if you are to find clearance) (only if comparative clearance is to be checked both tao & thickness would be provided in question)
Industrial Practical Approach: -
While, practically in mfg. industries the material of the sheet is known and we don't waste time to calculate by shear force as shear stress value is unknown and cannot perform testing of the material so there we use the percentage rule of thickness for that particular as shown in video for C.I, M.S. etc. the percentage to be taken may depend on its constituent concentration. The dimensions obtained by percentage rule are a bit bigger than the one by shear stress formula to always be on a safer side.
All industries have a chart/table of clearance values & % of thickness prepared based on past experiences for the materials they generally work with.
Hope it clears your concept.👍
@@OriginseShala Yes sir, clear how much about the percentage of thickness as practical.
Actually the % of thickness as I mentioned is not some calculative method but one based on experience from trial & error. It depends on the material to be press-worked and the thickness itself. But In most cases it can range from 0.15% to a 20% maximum. Based on my observations from different workshops. But it can vary.
Very very good explain thank you 🙏🙏🙏🙏🙏🙏🙏 esi tarah or bhi topic per video banate raho bahut help hogi
your welcome
Good knowledge for press tool design engineer 🙏👍👍
thanks
Esi hi classes mould theory pr bhi bana de bahot help hogi sir please 🙏🏿🙏🏿
If the part getting burr at one side after 30000 parts of production,then at that time how to solve the burr issue
Please help
Good explanation
Thank you very much 😊
You're welcome 😊
Bold the letter size whenever I saw your video letter size is not visual condition.
Kindly watch the lecture in 720p. The words will be readable. Or you can just download the whole PPT for reference from the link provided in the video description of the Press Tools - 6
sir plese change ur projecter colour. can. can’t visible ur. sentence
you can either switch to 480p or higher for better visibility of font or Download the PPT itself for reference and edit as per your liking. The download link is in video description.
Thank you very much sir
Most welcome