357502268-C-clamp-ppt.pptx

design

1. DESIGN AND ANALYSIS OF C-CLAMP WITH VARIOUS MATERIALS

2. ABSTRACT Design & Analysis of Mechanical Systems plays a backbone Role of success of particular Systems . The engineering design & Analysis process is a multi-step process including the research, conceptualization, feasibility assessment, establishing design requirements, preliminary design, detailed design, production planning and tool design, and finally production. C-Clamp Mechanical Systems, studied in this project has many applications starting from bench to rocket science . in this project we taken a two different material in consideration and find which one is preferable for the hold the work piece under the clamping principle.

3. What is Clamping? Once work piece is located, it is necessary to press it against locating surfaces and hold it there against the force acting upon it. The tool Designer refers to this action as clamping and the mechanisms used for this action are known as clamps. Clamping Principles Clamp should firmly hold the work piece without distorting it. Should overcome the maximum possible force exerted on work piece by using minimum clamping force Easy to operate

4. Types of Clamping Mechanical Actuation Clamps Pneumatic and Hydraulic Clamps Vacuum Clamping Magnetic Clamping Electrostatic Clamping Non Mechanical Clamping Special Clamping Operations

5. C-CLAMP: Name of this clamp is because of its “C” shaped body. C-clamp has a fixed jaw on one end and screw type jaw on other. Adjusting the screw closed the jaw and applies pressure. C-clamp is use to hold two object flush together. It is also use for carried out various operations on small job of wood & metal like filing, finishing, axe saw cutting etc. Clamps or G-clamps are typically made of steel or cast iron.

6. It is required to design a C-clamp for holding the jobs on the shop floor limiting dimension of the job are as follows H max = 150 mm W max =150mm The maximum clamping force required to hold the job is 10kN. The clamp is manually operated PROBLEM SPECFICATION

7. Sr . no Name of the component quantity Material 1 C-frame 1 Cast-steel grade 26-52 2 Screw 1 Steel 45C8 3 Nut 1 Phosphor bronze grade-1 4 Handle 1 Steel 30C8 5 Thrust pad 1 Steel 30C8 6 Set screw 1 Commercial steel 7 Hexagonal nut 1 Commercial steel

8. Formula used in frame design and screw design Z = 24,134 mm 3 CALCULATION     Two types of threads are popular for power screws- square and trapezoidal. In applications like lead-screw of lathe, trapezoidal threads are use because wear is series problem. The axial wear of trapezoidal threads is compensated by drawing the two halves of a split type nut to gather.

9. RESULTANT STRESSES σ 1 = t 1 – c 2 = (0.189 − 1.367) =-1.178 N/mm 2 σ 2 = t 1 + t 2 =0.189 + 1.367 = 1.556 N/mm 2 From above we can see that σ 2 is greater than σ 1 so compare the permissible stress with σ 2 .Here, σ 2 ˂ σ [ c] So , c-frame is safe in compression. A = (H − 2t)t + 2(B × t) = (60-24)12+2(48×12)

10. DESIGN OF SCREW ROD : Here, the screw rod is subjected to the compressive stress so check the rod in compression as under: Formula uses in screw rod design Hence σ c , < σ [ c ] so screw rod is safe in compression σ c = 95N/mm 2

11. DESIGN OF CAP SCREW In the cap screw area at the thread section is minimum hence; there is possibility of failure in Compression so checking it in the compression: Formula uses in cap screw design σ c = 44.06 N/mm 2 Hence, σc < σ[c] so cap screw is safe in compression

12. DESIGN OF JAW The jaw is also check in compression: Formula uses in jaw design σ c = 32.28 N/mm 2 Hence, σc < σ[c] so cap jaw is safe in compression

13. DESIGN OF HANDLE Formula uses in handle design When we applied the effort p1 at the end of handle, it is subjected to the bending. So check the handle in bending: α = 4.666˚ tan ϕ = µ ϕ = 5.711˚

14. Now, torque transmitted through screw rod: Mt =17,854.14 N/mm2 The torque transmitted through the handle is same as in screw rod: M b = p * L = (100*270) N/mm 2 Now, find the bending stress induced in handle due to effort p1 and compare it with the permissible bending stress. As, per bending equation: σ b =32Mb/πd σ b =100 N/mm2 d= 15 mm   Hence, σb < σ [b ] so handle is safe in bending. In this whole design of c-clamp, we found that the dimensions which are selected for modeling is safe in all the failures.  

15. Object Name Static Structural (B5) State Solved Definition Physics Type Structural Analysis Type Static Structural Solver Target ANSYS Mechanical Options Environment Temperature 22. °C Generate Input Only No MODEL AND ANALYSIS

16. Static load distribution graph

17. Uploaded IGES model of C-clamp in Workbench

18. Mesh model of C-clamp

19. stress model of C-clamp For structural steel:

20. For aluminum alloy stress model of C-clamp

21. safety factor model of C-clamp For structural steel

22. For aluminum alloy safety factor model of C-clamp

23. RESULT AND DISCUSSION In the project of C-clamp, we mainly consider the factor of griping of workspace at load condition without failure The whole design focuses on how the values of stresses Here, the basic concept is established for choosing the best material combination for given load The above analysis is fully made of structural steel and aluminum alloy compared to both material structural steel had a good safer value in all kind of analysis The handle part and the thrust pad are become safer than the structural steel, because the handle part more affected in the aluminum alloy.

24. Function Aluminum alloy Steel Stress value Min = 1.901 e 05 pa Max = 1.122 e 10 pa   Min = 4.15 e 04 pa Max =1.05 e 09 pa   Safety factor Min =2.27 e -02   Min =0.2381 RESULT AND DISCUSSION