DIE FOR PUNCHING REAMED HOLES

Abstract

This utility model relates to metal forming and can be used in process tooling for producing holes with curved elements in parts. A stamping die comprises a lower plate with a punch matrix containing holes and an upper plate. A shank for securing the stamp to the press ram is secured to the outer portion of the upper plate. A punch holder with punches is mounted to the inner portion of the upper plate through a gasket. A puller is attached to the upper plate through a buffer. The punches are pressed into the punch holder and are hexagonal with an angled sharpening on one side. The technical result consists in increasing the number of usable parts. 2 ill.

Description

[0001] The utility model relates to the technology of combined stamping used in the manufacture of electrode bases in autonomous power supply batteries for marine and river navigation equipment.

[0002] Various types of technological equipment and tooling can be used to manufacture electrode bases, for example:

[0003] ERMAKSAN ETP Servo 1250x2000 Coordinate Punch Press https: / / metal-stanki.ru / product / koordinatno-probivnoy-press-ermaksan-serii-etp-servo / offer-456 / . However, when using this equipment, after receiving a part with the specified characteristics according to the design documentation, it will be necessary to additionally stamp the fixing elements for the electrolyte, which significantly increases both the material and time costs for producing one element.

[0004] Standard stamping typically uses two to three dies to punch holes in specified locations, cut process holes for pressing, and then press the reamed holes to the specified dimensions to ensure reliable retention of the electrolyte inside the battery. However, this method is labor-intensive due to the need to manufacture additional tooling. Furthermore, equipment errors at any stage of stamping can lead to deviations from the specified parameters in the design documentation.

[0005] The disadvantages of these options for obtaining suitable parts are the use of additional expensive equipment and increased technological time for the production of just one electrode base.

[0006] The technical result of the utility model is an increase in the number of serviceable parts (a decrease in the number of defective parts) and a reduction in the time spent on installation, equipment adjustment and production of the finished part of the electrode base for autonomous current sources.

[0007] The technical result is achieved due to the fact that the stamp includes a lower plate with a punch-matrix with holes fixed to it, an upper plate on the outer part of which a shank is fixed for fixing the stamp on the press slider, and on the inner part of the upper plate, a punch holder with hexagonal punches pressed into it, sharpened on one side at an angle of 60°, is installed through a gasket, and a puller is attached to the upper plate through a buffer.

[0008] Fig. 1 shows a finished part of the electrode base for autonomous current sources.

[0009] Fig. 2 shows a stamp for punching reamed holes in the base of the electrode of an autonomous current source.

[0010] The stamp includes a lower plate 1 with a punch-matrix 2 fixed to it; a shank 8 for fixing the stamp on the press ram is fixed on the outer part of the upper plate 7; a punch holder 5 with punches 4 pressed into it (in this version, seventy-seven are installed) is fixed on the inner part of the upper plate 7 through a gasket 6; a puller 3 is fixed to the upper plate 7 through a buffer 9. The number of punches can be any, depending on the task.

[0011] Using this type of stamp allows for the production of parts with specified characteristics and parameters, with curved fixing elements for the electrolyte, without the use of additional time costs, and without the introduction of separate purchased equipment.

[0012] The stamp works as follows.

[0013] Lower plate 1 is mounted on the crank press table by its shank 8. Upper plate 7 is secured to the crank press ram using the clamp provided on the press. After adjusting the press stroke height, the part is mounted on punch die 2 and a test punch is made of the reamed hole. In this case, when the press is closed, the puller 3, secured through the buffer 9 to the upper plate 7, begins to compress, securing the workpiece tightly in its place, and the punches 4, secured to the upper plate 7 through the punch holder 5, begin to pierce, notch and squeeze the material into the round holes of the punch-matrix 2. After the impact has been made and the press is opened, the workpiece is removed from the punch-matrix 2 with tweezers and the height of the squeeze is measured; if the height corresponds to the specified characteristics in the design documentation, then stamping continues in the normal mode.By using hexagonal punches 4 sharpened on one side at an angle of 60° and round holes in the punch-matrix 2, a single blow pierces the material, punching at the junction of the hexagonal punches 4 with the mating part, and due to the frictional force of the punch on the workpiece material, the punched parts are turned out into the free spaces of the round holes of the punch-matrix 2. Moreover, the suitable parts obtained by this method can be used immediately from the stamp in further production.

[0014] Four punches made of hexagonal rod with a 60° sharpening angle provide convenient piercing of the workpiece. A smaller angle will squeeze the material out before piercing, which will reduce efficiency and increase stress on the flat part of the workpiece. At a higher angle, the excessively sharp tip will chip or become dull after the first 10 strikes, reducing the number of defective parts. The hexagonal shape of the punch allows for quick and accurate punching of the corners for subsequent pressing to specified specifications, without the use of additional equipment or tooling. This reduces time costs and the number of defective parts. The puller, which houses the punches, allows for the removal of the workpiece without damaging the flatness of the part.In the lower part (fixed) there is a punch-matrix with round holes for the free movement of the workpiece material. During the stamping operation, this design of the stamp ensures the quick and accurate removal of finished products, reducing the number of defective products, while the process is carried out faster, reducing time costs due to the fact that 3 technological operations are performed per strike, on one stamp.

[0015] Using this die design not only allows us to produce parts with the parameters specified in the design documentation, but also reduces the time required to produce additional devices.

[0016] Thus, the proposed die design reduces the amount of tooling required to produce parts of this type, reduces the number of manufacturing operations, and shortens the production time per component. The resulting units will fully comply with the specifications specified in the design documentation and meet rigidity standards for securely holding components in autonomous power sources.

Claims

A stamp for producing holes with curved elements by punching, comprising a lower plate with a punch-matrix with holes fixed thereto, an upper plate, on the outer part of which a shank is fixed for fixing the stamp on the press slider, and on the inner part a punch holder with punches is installed through a gasket, and a puller attached to the upper plate through a buffer, characterized in that the punches are pressed into the punch holder and are made hexagonal with a sharpening located at an angle on one side.

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