Device for manufacturing hollow parts draught

 

(57) Abstract:

Usage: metal forming, in particular the production of hollow parts with a profile on the part of the inner surface. The inventive device for the precipitation of hollow workpieces comprises upper and lower plates, the matrix, the punch, the frame and the ejector. Traverse lift ejector rods connected with the upper plate with the possibility of vertical movement within the mandrel. When the ejector and yoke rigidly interconnected and biased relative to the matrix, located on the crumbs that are installed on the bottom plate. The mandrel is made with a smooth bottom and profile top work areas. The upper section is placed the safety device workpiece having a profile corresponding to the profile of the mandrel. The bottom plate has a cross-shaped slot on the top plane under the yoke. While the depth of the groove corresponds to the thickness of the bar. 4 Il.

The invention relates to the processing of metals by pressure, in particular the production of products draught, and can be used in the production of parts mainly to the profile of the internal cavity.

A device for the manufacture of parts asadministrative spring-loaded terminals, before upsetting protruding above the mirror matrix, at the moment of precipitation buried in the nest, and after precipitation again rising above the mirror together with the item.

However, in this solution for springs in the lower plate is executed release. This weakens the plate. By increasing its thickness increases the intensity of the device. When reducing the thickness of the plate it sags, the reduced tool life and part quality due to deflection.

The closest in technical essence to the invention is a device for manufacturing hollow parts intended for precipitation hollow workpieces. This unit has a frame, which forms the inner surface of the part. The mandrel is performed stepwise: the bottom level with the bottom plate of the device form the lower working surface for precipitation. The mandrel is simultaneously the release of the original piece, and ejector parts of the matrix.

However, there is a need for removal of parts from the mandrel, which increases the complexity and reduces performance. The disadvantages of the device include the presence of hydraulic ejection and removal, which limits the choice of presses narrows technological capabilities.

The purpose of the invention is the expansion of technological capabilities, increase productivity and reduce the complexity, the removal of restrictions when choosing equipment.

This is achieved by a device for manufacturing hollow parts draught, containing upper and lower plates, the matrix, the punch, the mandrel with the working surface and the ejector equipped with a traverse lift ejector made in the form of detachable cross members rigidly connected with the upper plate rods, ejector made ring rigidly mounted on the transverse concentric with the mandrel and the matrix in the annular cavity formed by their external and internal working surfaces and is spring-loaded relative to the matrix associated with the bottom plate of biscuits, a frame rigidly mounted on the bottom plate and located diametrically through the slots placed in them by the cross, the height of which exceeds the stroke of the bar, while the working surface of the mandrel performed sequentially located profile and smooth areas in the upper part of the mandrel is the safety ring blanks, the cross section of which corresponds to the cross-sectional profile section of the mandrel and the bottom plate of the IG. 3 is a General view of the device of Fig. 4 - the bottom of the unit plan.

The device consists of an upper 1 and lower 2 plates, matrix 3, a plunger 4, the mandrel 5, the safety device 6, the ejector 7, the head plate 8, crackers rods 9 and 10. The punch 4 is fixed on the top plate 1. The mandrel 5 is installed in the bottom plate 2 and has two diametrically arranged slot, which has a yoke 8 with the possibility of vertical movement. The traverse is made in the form of a cross of two separate plates.

When assembling, first put one of the plates, then the second and each of them is rigidly attached to the piston 7 by screws 11. The whole system of the ejector - spring-loaded yoke relative to the lower plane of the matrix 3 by means of springs 12. Matrix 3 is posted on the crackers 9 installed on the bottom plate between the plate beam-crossings, and through the crumbs attached to the bottom plate 2. The mandrel, the ejector and the matrix is set relative to each other concentrically. The mandrel has a smooth and a profile part.

On the core side of the mandrel 5 is placed the safety device 6 having a profile corresponding to the profile of the mandrel, but is made smaller in size. Thrust 10 rigidly connected with the upper plate 1 by nuts 13, and at their, equal to the height of the bar, and openings for the passage of the rod 10 by screws 14. The device has a column guides 15 and sleeve 16.

The device operates as follows. The workpiece 17 is installed with a fixation on the safety device 6. When the press slide down falls the upper part of the device. Thrust 10 move down and let go of the yoke 8. Under the action of the spring 12, the ejector 7 and the yoke 8, fastened by screws 11 are omitted. When the contact plug 4 with the workpiece she pushed with the annular gap between the matrix 3 and the parts of the mandrel 4. When the traverse 8 is buried in the groove of the bottom plate 2 and rests on the plate, the ejector 7 is based on the yoke 8 and the plate 2, starts the deformation of the workpiece draft. The outer diameter of the part is calibrated by 3 matrix, smooth inner diameter of the smooth portion of the mandrel 5, in the flow of metal in the hollow profile section of the mandrel 5 is made relevant portion of the part. Upon reaching the desired height details draught stops. When the movement of the press slide up under the action of the rod 10 yoke 8 with the ejector 7 moving upward, the spring 12 is compressed, stamped parts rises. When the ejector is returned to its original position, i.e., padnimae one of its surface and can be removed from the zone of the device. Again set the workpiece, the process repeats.

The use of the invention allows to expand the technological capabilities by obtaining various forms of parts to increase the performance and reduce the complexity due to the rapid fixing of the workpiece before the draft stamp and opportunities after popping removal stamped parts, to expand the range of pressure equipment by combining the device functions deformation and ejection independent ejector system presses. (56) USSR Author's certificate N 1704896, CL 21 J 5/12, 1989.

DEVICE FOR MANUFACTURING HOLLOW PARTS DRAUGHT, mainly with a profile on their inner surface, comprising upper and lower plates, the matrix, the punch, the mandrel with the working surface and the ejector, wherein it is provided with a head plate lifting ejector made in the form of detachable cross members rigidly connected with the upper plate rods, ejector made ring rigidly mounted on the transverse concentric with the mandrel and the matrix in the annular cavity formed by their external and internal working surfaces, and is spring-loaded relative to the matrix relating the mi through the slots placed in them by the cross, the height of which exceeds the stroke of the bar, while the working surface of the mandrel is formed of successive profile and smooth areas in the upper part of the mandrel is the safety ring blanks, the cross section of which corresponds to the cross-sectional profile section of the mandrel and the bottom plate is made grooves under the crossbar depth equal to the thickness of the bar.

 

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