RU2510734C1 - Die for making u-shape parts from blanks - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly, to stamping and can be used for making U-shape parts. Punch shoe accommodates bending male dies while die shoe supports male die with recessed thrusts arranged with clearance therewith. Note here that punch shoe supports piercing dies to cut lateral skews for contact with recessed thrusts ahead of flexible blank and finished part cutting die. Note also that clearance between recessed thrusts relative to male die faces makes at least the billet depth to allow finished part withdrawal at billet displacement.

EFFECT: higher efficiency, simplified design.

4 dwg

Description

The invention relates to the processing of metals by pressure, in particular to stamping dies and can be used for the manufacture of U-shaped parts.

A stamp is known for the manufacture of U-shaped parts from a sheet blank 31, comprising bending punches 3 mounted on the top plate 1, a puncheon 11 installed on the bottom plate 9 and drowning stops 12 (see copyright certificate SU 414031, IPC B21D 35/00, 09.24.1974 ) is a prototype.

In this stamp, the shelves of the part are flexible in the transverse direction relative to the direction of movement of the workpiece, which complicates the design of the stamp due to the need for an additional device to remove the part from the stamp, which reduces its productivity.

The technical result, which the invention is directed to, is to streamline the design and increase productivity.

The technical result is achieved in that in the stamp for the manufacture of U-shaped parts from a sheet blank, containing bending punches mounted on the upper plate, a punch installed on the lower plate and drowning stops located with a gap relative to it, unlike the prototype, it is equipped with the top plate with cutting punches for cutting technological side cuts in the workpiece - bevels that serve to touch the drowning stops in front of the flexible workpiece, and the punch cuts the finished part, while Azores drowning between abutments relative to the face of the punch is not less than the workpiece thickness for removing the finished workpiece while moving the workpiece.

Figure 1 shows a stamp for the manufacture of parts of a U-shaped form from a sheet blank; figure 2 is the lower half of the stamp, a top view; figure 3 is a section aa in figure 2 (with the open position of the stamp); figure 4 - the same, with the closed position of the stamp.

The stamp contains on the top plate a matrix 1 consisting of a clamp 2 and bending punches 3, punching punches 4 for cutting technological side cuts - bevels 5 in the workpiece 6, a buffer 7, a punch of segments 8 of the finished part 9.

On the bottom plate are installed: a punch 10, guide strips 11 for a sheet stock 6, temporary stops 12 and 13, as well as drowning stops 14 located with a gap between the drowning stops relative to the faces of the punch 10 not less than the thickness of the workpiece to ensure removal of the finished part 9 when moving blanks 6. Stops 14 are spring-loaded with a spring 15.

The stamp works as follows.

At the beginning of the work, the sheet strip blank 6 is fed along the punch 10 between the guide strips 11 to the temporary stop 12, which is previously extended to the blank 6, then the stop 12 is retracted, and the cutting punches 4 are cut at the end of the blank 6 technological side cuts - bevels 5. Next, the blank 6 moves to the temporary stop 13 and the following side cuts - bevels 5 are again cut in the workpiece 5. The temporary stops 12 and 13 no longer participate in work with the workpiece being processed. The workpiece 6, having side cuts - bevels 5, is fed by the first cuts formed on the end face of the workpiece - bevels 5 until these bevels touch the drowning stops 14.

During the working stroke of the press punch, the workpiece 6 is pressed by a clamp 2 to the punch 10 and the bending punches 3 bend the workpiece 6 to a U-shape, while the bending punches 3 press on the stops 14, which are recessed in the bottom plate. At the same time, punching punches 2 cut the following technological side cuts - bevels 5, and a punch of segments 8 cuts off the finished part 9 from the workpiece 6.

When lifting the upper plate, the drowning stops 14 return to their original position. When moving the workpiece 6, the shelves of the part 9 pass between the faces of the punch 10 with a gap relative to the sinking stops 14 and the finished part 9 is removed from the stamp, and the workpiece 6 is touched by technological side cuts - bevels 5 of the stops 14 and the stamp is ready to make the next part.

The invention is industrially applicable.

Confirmation is the fact of the development of design documentation and the manufacture of stamped U-shaped parts from sheet blanks.

Claims (1)

A stamp for the manufacture of U-shaped parts from a sheet blank, containing bending punches mounted on the upper plate, a punch installed on the lower plate and drowning stops located with a gap relative to it, characterized in that it is equipped with cutting punches mounted on the upper plate for cutting in the blank technological side cuts-bevels, which serve to touch the drowning stops in front of a flexible workpiece, and the punch cuts the finished part, while the gap between the drowning stops relative to her punch is not less than the thickness of the workpiece to ensure removal of the finished part when moving the workpiece.

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