Pneumatic metal-work tool

A pneumatic metal-work tool comprising:

• a) a piston having a piston rod;
• b) a casing assembly having a control valve on a first end and a cylindrical hole receiving the piston and the piston rod on a second end thereof;
• c) a hydraulic push-rod assembly including:
• i) a first threaded base having a center cylindrical hole and being threadedly connected on a first end to the second end of the casing assembly, the piston rod extending through the cylindrical hole in the first threaded base;
• ii) a connection pipe having a center cylindrical hole, and a first end threadedly connected to a second end of the first threaded base;
• iii) a second threaded base having a center cylindrical hole, a short rod on a first end inserted into the cylindrical hole of said connection pipe;
• a ring-shaped plate positioned on the second end of said connection pipe, and a round rod on a second end thereof;
• the second end thereof having a threaded hole for receiving a punch assembly;
• iv) a threaded sleeve having a cylindrical hole and positioned around the second threaded base and threadedly connected to a second end of the connection base, such that ring-shaped plate of the second threaded base is held against the second end of the connection base by the threaded sleeve;
• v) a push rod having a ring-shaped plate with a first round rod on a first end thereof, and said first round rod inserted in the cylindrical hole of said threaded sleeve;
• a second end of said ring-shaped plate having a second round rod;
• the second end of said push rod having an elongated cylindrical hole defining a hydraulic chamber, the first end thereof having a threaded hole and a cylindrical hole for receiving a threaded bolt;
• vi) a spring mounted on the first round rod of said push rod and positioned between said ring-shaped plate of the push rod and said short rod of said second threaded base;
• vii) a ring seal and a first O-ring mounted on outer surface of the second round rod of the push rod;
• a first retaining ring mounted on the second end of the push rod;
• said ring seal and first O-ring being in close contact with a surface of the cylindrical hole in said connection pipe;
• and
• viii) a threaded bolt with a second O-ring mounted in the threaded hole on the first end of said push rod;
• and
• d) a punch assembly is an edging assembly and includes:
• i) an opening at a first end of a C-shaped base;
• both sides of said opening having a cylindrical hole respectively receiving an edge-punching base and a punch head of said punch shaft;
• a second end of said C-shaped base furnished with a threaded cylinder, of which a center being furnished with a cylindrical hole for receiving a punch shaft and a spring;
• ii) a spring mounted in the cylindrical hole of threaded cylinder of said C-shaped base, and outer end thereof being in contact against a shoulder of a punch shaft;
• iii) said punch shaft mounted in said cylindrical hole of said C-shaped base;
• one end thereof having a short shaft being in contact with the first end of said push rod, while other end thereof having an edging slot on said punch head and facing said opening;
• and
• iv) an edge-punching base mounted in the cylindrical hole on an outer side of said opening of said C-shaped base and having a round disk with an edging slot.

A pneumatic metal-work tool comprising:

• a) a casing assembly, and a hydraulic push-rod assembly;
• said hydraulic push-rod assembly including:
• b) a first threaded base threadedly connected on a first end to an outer end of said casing assembly;
• a center cylindrical hole thereof for receiving a piston rod inserted into a cylindrical hole of a push rod;
• c) a connection pipe having a center cylindrical hole, a first end threadedly connected to a second end of the first threaded base on said casing assembly, while other end thereof being mounted with a threaded base;
• then, a threaded sleeve mounted on outside thereof;
• d) a second threaded base having a center cylindrical hole, a short rod on a first end inserted into the cylindrical hole of said connection pipe;
• a ring-shaped plate positioned on the second end of said connection pipe;
• a second end thereof furnished with a threaded hole for receiving a punch assembly;
• e) a threaded sleeve having a cylindrical hole and positioned around the second threaded base and threadedly connected to a second end of the connection base, such that ring-shaped plate of the second threaded base is held against the second end of the connection base by the threaded sleeve;
• f) a push rod having a ring-shaped plate with a first round rod on a first end, and said first round rod inserted in the cylindrical hole of said threaded sleeve;
• a second end of said ring-shaped plate having a second round rod;
• the second end of said push rod having an elongated cylindrical hole defining a hydraulic chamber, while the first end thereof having a threaded hole and a cylindrical hole for receiving a threaded bolt;
• g) a spring mounted on the first round rod of said push rod, and positioned between said ring-shaped plate of the push rod and the short rod of said threaded base;
• h) a ring seal and a first O-ring mounted on outer surface of the second round rod of the push rod;
• a first retaining ring mounted on the second end of the push rod;
• said ring seal and first O-ring being in close contact with a surface of a cylindrical hole in said connection pipe;
• i) a threaded bolt with a second O-ring mounted in the threaded hole on the first end of said push rod.

A pneumatic metal-work tool comprising:

• a casing assembly, a hydraulic push-rod assembly and a punch assembly;
• said punch assembly being mounted on a second threaded base of said hydraulic push-rod assembly, and said punch assembly including:
• a C-shaped base having an opening on a first end and two sides of the opening having fixed holes for receiving a guide sleeve and a punch base respectively;
• a second end thereof having a threaded cylinder with cylindrical hole for receiving a spiral spring and a punch shaft;
• the punch shaft including a short shaft, two guide shafts having different diameters, and a round shaft;
• said short shaft being in contact with the first end of said push rod;
• said two guide shafts being in contact with two cylindrical holes in the C-shaped base having different diameters respectively;
• outer end of said round shaft mounted with said spiral spring, and a punch head mounted in said guide sleeve;
• the spiral spring mounted on said round shaft of said punch shaft;
• a positioning plate mounted a cylindrical hole of said threaded cylinder, and being in contact with said spiral spring;
• the guide sleeve mounted in a first fixed hole on a first side of said opening, and center thereof having a cylindrical hole for receiving a punch head of said punch shaft;
• the punch base mounted in a second fixed hole of a second side of said opening, and said punch base having a punch hole;
• and
• a threaded positioning ring mounted on a threaded portion of a threaded cylinder of said C-shaped base.

A pneumatic metal-work tool comprising:

• a casing assembly, a hydraulic push-rod assembly and a punch assembly;
• said punch assembly being mounted on a second threaded base of said hydraulic push-rod assembly, and said punch assembly including:
• a C-shaped base having an opening at a first end thereof;
• opposing sides of said opening having two cylindrical holes respectively for receiving an edge-punching base and a punch head of said punch shaft;
• a second end of said C-shaped base furnished with a threaded cylinder, of which a center being furnished with a cylindrical hole for receiving a punch shaft and a spring;
• the spring mounted in the cylindrical hole of the threaded cylinder of said C-shaped base, and outer end thereof being in contact against a shoulder of said punch shaft;
• the punch shaft mounted in said cylindrical hole of said C-shaped base;
• a first end thereof having a short shaft being in contact with the first end of said push rod, while a second end thereof having an edging slot on said punch head and facing said opening;
• and
• an edge-punching base mounted in the cylindrical hole on an outer side of said opening of said C-shaped base and having a round disk with an edging slot.