Abstract

said loading trolley (20) and removal trolley (30) are vertically movable, by means of respective controlled lifts (22, 32), between a lower position and one or more service positions in which they are arranged adjacent to said jigs (1, 10).

IPC Classes  ?

• B29C 44/34 - Component parts, details or accessories; Auxiliary operations
• B29C 44/12 - Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
• B29L 31/44 - Furniture or parts thereof

Abstract

A machine for folding sheet metal (L) has at least one sheet metal supporting tool (14) movable along a first axis (X), at least one sheet metal pressing tool (30) movable along a second axis (Y), and at least one sheet metal folding tool (17) movable along at least the first and the second axis (X,Y); the sheet metal folding tool (17) has a cylindrical bar (18) with a flat face (19) on which the sheet metal (L) to be folded rests; the cylindrical bar (18) is rotatably supported to rotate during the folding step around a profile of the sheet metal pressing tool (30). Folds with a rounded angle are thus obtained with a simple, cheap and reliable machine.

IPC Classes  ?

• B21D 5/04 - Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work

Abstract

A machine for bending sheet metal provides at least one sheet metal resting tool, at least one sheet metal pressing tool, and at least one sheet metal bending tool, parallel to one another; for moving the tools along a first and a second axis perpendicular to one another at least two electric motors are provided for moving the sheet metal pressing tool along the second axis, at least two electric motors for moving the sheet metal bending tool along the first axis and at least two electric motors for moving the sheet metal bending tool along the second axis; a command and control unit connected to the electric motors commands and controls the driving of the electric motors to maintain the parallelism between the tools in the operating step. In this manner, using hydraulic drives is avoided.

IPC Classes  ?

• B21D 5/04 - Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
• B21D 5/00 - Bending sheet metal along straight lines, e.g. to form simple curves

Abstract

A system is provided for tightening tie rods of a press formed by a base with a supporting plane, a head, a framework consisting of at least one pair of columns that connect the head to the supporting base, a tool or mould-holding ram driven with reciprocating motion to and from the supporting plane, at least one tie rod (19) received inside a respective column to join the base, the head and the column, in which the ends of each tie rod (19) are threaded and one of the ends is at the base whereas the other is at the head; the system for tightening provides that on the two ends of the tie rod (19) two respective internally threaded toothed wheels (21) are screwed, one of which acts on the base and the other acts on the head to fix the various parts together, and that there is at least one mechanical device (24) for reducing the operating force, which is drivable manually from the exterior and suitable for coupling with the toothed wheel (21) to tighten the tie rod (19). This system for tightening does not increase overall dimensions and is cheap.

IPC Classes  ?

• B30B 15/04 - Frames; Guides
• B21J 13/04 - Frames; Guides
• F16B 31/04 - Screwed connections specially modified in view of tensile load; Break-bolts for maintaining constant tensile load
• B25B 29/02 - Bolt tensioners
• B30B 15/08 - Accessory tools, e.g. knives; Mountings therefor

Abstract

A sheet- metal punching machine (10) provides a punching unit (11) having a slide (15) that is movable along an axis (X), on which are mounted a series of punches, a corresponding series of dies, and a series of actuators (20); each punch is driven by a respective actuator (20) and is drivable singly or jointly with other punches. The machine further provides a positioning unit (12) that is able to remove and move the sheet metal along an axis (Y) that is perpendicular to the axis (X) along which the slide (15) moves and able to rotate the sheet metal, to take the sheet metal to the correct position at the punches and the respective dies. A simple and compact punching machine is thus obtained, that enables single punching or simultaneous multiple punching to be carried out, and enables the sheet metal to be positioned correctly with a low risk of damage to the sheet metal.

IPC Classes  ?

• B21D 28/04 - Centering the work; Positioning the tools
• B21D 28/26 - Perforating, i.e. punching holes in sheets or flat parts
• B21D 43/14 - Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by turning devices, e.g. turn-tables
• B21D 28/24 - Perforating, i.e. punching holes

Abstract

A machine (10) for bending sheet metal (L) provides at least one sheet metal resting tool (18), at least one sheet metal pressing tool (36A-D), and at least one sheet metal bending tool (25), parallel to one another; for moving the tools (18,25,36A-D) along a first (X) and a second axis (Y) perpendicular to one another at least two electric motors are provided for moving the sheet metal pressing tool (36A-D) along the second axis (Y), at least two electric motors (M2) for moving the sheet metal bending tool (25) along the first axis (X) and at least two electric motors (M3) for moving the sheet metal bending tool (25) along the second axis (Y); a command and control unit connected to the electric motors (M2,M3) commands and controls the driving of the electric motors (M2,M3) to maintain the parallelism between the tools (18,25,36A-D) in the operating step. In this manner, using hydraulic drives is avoided.

IPC Classes  ?

• B21D 5/04 - Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work

Abstract

A punching machine (10) for metal sheet; the machine (10) comprises a C- shape support frame (11) having means for supporting a metal sheet (14) to be punched, arranged within a cavity between a lower arm (11 A) and an upper arm (11 B). The punching machine (10) further comprises a plurality of dies (15) within respective seats of the lower arm (11 A); a plurality of punching units (16) within respective seats of the upper arm (11 B), and a support (23), suitable for being turned upwards, for a plurality of control cylinders (17) for the punching units (16), wherein the support (23) with the control cylinders (17) can be rotated between a lowered position, wherein the control cylinders are axially aligned with respective punching units (16), and a raised position wherein the support (23) with the control cylinders (17) are angularly spaced apart from the punching units (16).

IPC Classes  ?

• B21D 28/24 - Perforating, i.e. punching holes