RU2246366C1 - Die set for making corrugated sheet parts - Google Patents

Abstract

FIELD: plastic working of metals, namely sheet forming processes and equipment.

SUBSTANCE: die set includes movable upper plate with members for fastening on press slide; punch; die with bending protrusions. Punch is mounted on die through rotary unit. Bearing surface of punch in zone of transmitting effort is cylindrical one. Slides are mounted on bearing surface of punch. There are grooves on lateral surfaces of punch. Upper surfaces of slides and grooves are equidistant relative to bearing surface of punch. Rollers mounted on jaws of plate are arranged in said grooves with possibility of motion. Fixing members for orienting sheet blanks are mounted in die.

EFFECT: enhanced accuracy, lowered number of operations at making corrugations on sheet blank with use of standard press equipment.

4 cl, 3 dwg

Description

The invention relates to the processing of metals by pressure, namely to sheet stamping.

Known stamp by ed. testimonial. USSR No. 592482, in which the molding of corrugations occurs under the influence of punches having the ability to move freely relative to each other due to their articulation on movable levers mounted on spring-loaded creepers. During the operation of the stamp, the bending force depends on the spring resistance and cannot be arbitrarily large, therefore this stamp can only be used for processing sheets of small thicknesses, the height of the corrugation is limited by the magnitude of the spring travel.

Known stamp by ed. testimonial. USSR No. 1509154, adopted by the authors for the prototype, containing the upper and lower plates, with a punch and a matrix attached to them, the upper plate is attached to a rotary beam of a non-standard press. Parts are manufactured sequentially and include preliminary bending of one corrugation wall and calibration of the next.

The disadvantage of this stamp is the need to create specialized equipment, which leads to additional costs; low productivity of the stamp is due to the fact that in one stroke of the press is flexible and calibration of only one corrugation; low accuracy of manufacturing parts due to the accumulation of errors when moving and basing parts. This stamp does not allow to manufacture a part with an arbitrary shape of the corrugation (one wall must necessarily be made with a right angle, as it is used for fixing in steps). In this stamp, there is no latch for the first step, which does not allow to obtain an identical configuration of the first corrugation on the received parts.

This invention solves the problem of creating a stamp that runs on standard press equipment, which increases the accuracy of the corrugations on the sheet part and reduces the number of technological operations for producing corrugations.

To achieve the technical result indicated in the stamp for the manufacture of sheet metal parts with corrugations, including a movable upper plate with fastening elements on the press slide, a punch, a matrix with bending protrusions, the punch is fixed to the matrix through a rotary assembly, the support surface of the punch in the force transfer zone is cylindrical, The runners are fixed on the supporting surface of the punch, grooves are made on the sides of the punch, the upper surface of the runners and grooves is made equidistant to the supporting surface of the punch, in the grooves are mounted with the ability to move the rollers, mounted on the cheeks of the plate, on the matrix mounted clamps for the orientation of the sheet blanks.

In addition, the grooves are made with access to the working surface of the punch.

In addition, the runners are made of soft metal.

In addition, the runners are made of bronze.

A distinctive feature of the proposed stamp is the presence of a rotary assembly mounted on the die with which the punch is connected, which makes it possible to rotate the punch during the translation of the press slide through the supporting surfaces of the punch and plate, which allows one to bend all corrugations when the punch is rotated relative to the matrix and the final calibration of the part at the end of the stroke in one stroke of the press, get a better part. The supporting surface of the punch in the zone of transmission of force is cylindrical. The runners are fixed on the supporting surface of the punch, designed to transmit forces from the press through the supporting surface of the plate when converting the vertical translational movement of the press slider into the rotational movement of the punch. On the lateral sides of the punch, grooves are made so that their upper surface and the surface of the runners are equidistant to the supporting cylindrical surface of the punch. In the grooves with the ability to move installed rollers mounted on the cheeks of the plate to return the stamp to its original position during the reverse stroke of the press. The matrix is equipped with clamps to orient sheet blanks.

To ensure operational safety and ease of assembly, the grooves are made with access to the supporting surface of the punch, which ensures, if necessary, the rollers out of engagement with the punch. The exit of the rollers occurs if the press slider rises above the maximum opening height of the stamp, which protects the stamp from breakage.

The runners can be made of soft metal, such as bronze or another material that provides a minimum coefficient of friction, which can significantly improve performance with reduced slip, reduced wear of the stamp, increase its maintainability and ensure smooth rotation of the punch.

The proposed stamp for the manufacture of sheet metal parts with corrugations is illustrated by the drawings shown in figures 1-3.

Figure 1 shows a stamp in the open position at the time of the start of bending of the part; figure 2 shows the stamp, which is in the closed position at the end of bending sheet blanks; figure 3 is a view aa in figure 2.

The stamp for the manufacture of parts with corrugations from sheet blanks contains a rotary punch 1 mounted on the matrix 2 through a rotary assembly formed by the upper bracket 3 and the lower bracket 4 connected by the axis 5. The upper plate 6 with fastening elements on the press slide (not shown). The cheeks 7 are fixed to the plate 6, on which the rollers 8 are mounted, installed in the grooves of the punch 1. The grooves 9 are made with the output 10 on the supporting surface of the punch 1. The supporting surface of the punch in the force transfer zone is made in the form of a cylindrical segment equal to or greater than the opening angle stamp, which provides the conversion of the translational movement of the plate 6, mounted on the slider of the press, in the rotational movement of the punch 1 due to sliding. On the supporting surface of the punch 1, the runners 11 are fixed, the surface 12 mating with the plate 6 which is made equidistant to the supporting surface of the punch 1. The upper surfaces 13 of the grooves 9 are made equidistant to the supporting surface of the punch 1. On the matrix 2 are mounted clamps 14 for sheet blanks 15. In particular, the clamp 14 can be made with grooves for adjusting the position of the sheet stock on the matrix. The mating surfaces of the plate 7 and the runners 11 represent a pair of slip, designed to increase the wear resistance of the stamp, as well as contributing to the smooth rotation of the punch. The skids 11 to reduce sliding friction are made of soft bronze, and the plate 6 is made of steel, which allows to achieve a minimum coefficient of friction.

The stamp for the manufacture of parts with corrugations from sheet blanks is designed for use on standard press equipment and works as follows. The sheet blank 15 is placed on the matrix 2 between the clamps 14, after which the force from the press slide through the mating surfaces of the plate 7 and the runners 11 is transmitted to the punch 1 and is converted into a rotary movement of the punch relative to the axis 4. There is a gradual bending of one corrugation and preliminary lifting of the material to form the next corrugation, at the end of the rotation of the punch 1 is the final calibration of all corrugations of the part. With the reverse movement of the press slide, the force through the rollers 7 is transmitted to the upper surfaces 13 of the grooves and the punch 1 returns to its original position, while the working parts of the stamp open.

Claims (4)

1. A stamp for the manufacture of sheet metal parts with corrugations, including a movable top plate with fastening elements on a press slide, a punch, a die with bending protrusions, characterized in that the punch is mounted on the die through a rotary assembly, the supporting surface of the punch in the force transfer zone is cylindrical, The runners are fixed on the supporting surface of the punch, grooves are made on the sides of the punch, the upper surfaces of the runners and grooves are made equidistant to the supporting surface of the punch, installed in the grooves with the possibility of In order to move the rollers, fixed on the cheeks of the plate, clamps are installed on the matrix to orient the sheet blanks. 2. The stamp according to claim 1, characterized in that the grooves are made with access to the supporting surface of the punch. 3. The stamp according to claim 1, characterized in that the runners are made of soft material. 4. The stamp according to claim 3, characterized in that the runners are made of bronze.

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