Search Results for punch

Fig. 16 Punch compression. P is total punch load, L is length, Y is deflection, A is area of punch, and E is Young's modulus. More

Fig. 23 Guided punch. Courtesy of Durable Punch and Die Company More

Fig. 8 Punch force trajectories for samples 6 to 10 without process control. Punch force trajectories using constant binder force of 575 kN (65 tonf) More

Fig. 11 Punch force plots using process control and a reference punch force ( F p ) trajectory More

Fig. 58 Three types of failure in deep drawing. (a) Fracture over punch nose; punch nose radius is too sharp. (b) Chevron fracture in wall; die-profile radius is too sharp. (c) Vertical crack in thick-walled cups; die-profile radius may be too sharp, and blank edge may be poor. More

Fig. 6 Backward extrusion punch. A, nose angle; B, punch land; C, corner radius; D, relief angle More

Fig. 9 Shear punch test schematic. w , die-punch clearance; θ, shear angle; d , shear punch displacement; F , applied load; r punch , punch radius; r die , lower-die inner diameter; 1, shear punch; 2, upper die; 3, disc specimen; 4, lower die More

Fig. 10 Residual surface stresses for S5 steel punch. Source: Ref 11 More

Fig. 11 Damage to a punch after a double hit on a sizing press More

Fig. 6 Two-level compaction. (a) Single lower punch when h ≤ H /4. (b) Double lower punches when h > H /4. Source: Ref 3 More

Fig. 14 Effect of compressive stress on tubular punch More

Fig. 15 Tensile stresses in a tubular punch during compacting. Large arrows indicate action of powder on walls of punch. More

Fig. 3 Hole punching parameters. (a) Allowable sheet thickness-to-punch diameter for hole punching as a function of material shear strength. (b) Minimum punch diameter (hole size) as a function of material thickness for three materials: A, 195 MPa (28 ksi) copper; B, 345 MPa (50 ksi) steel; C More

Fig. 2 Schematic of nibbler setup with excessive gap between the punch and die, resulting in the formation of burrs on the workpiece More

Fig. 10 Galling on surface of punch after punching each of ten holes More

Fig. 17 Effect of punch-face shear on punching force More

Fig. 20 Relationship of punch diameter to material thickness More

Fig. 21 Ratio of material thickness to punch diameter as a function of shear strength More

Fig. 22 Minimum punch diameter (hole size) as a function of material thickness More

Fig. 26 Distance of punch travel through 3.2 mm ( 1 8 in.) thick flat naval brass stock (hardness, 62 HRB) for complete severance More