Tool for radial forging
The invention relates to the processing of metals by pressure, and in particular to a tool for radial forging used in forging presses in chetyrehpostovyh forging devices and radial crimp machines. The tool contains two pairs located in mutually perpendicular planes Boykov with cutouts. Boiky have two pairs are displaced relative to each other along a longitudinal axis inclined working surfaces. Each pair consists of a adjacent to each other long and short surfaces. When closing Boykov long working surfaces form two spaced criss-cross diamond pattern. The result is increased productivity and more intensive deformation study of the cast structure of the metal workpieces. 4 Il.
The invention relates to the processing of metals by pressure, and in particular to a tool for radial forging used in forging presses in chetyrehpostovyh forging devices and radial crimp machines (RUM).
It can be used in machine-building and metallurgical industry for the production of products with a long axis, such as rods, what such products, as well as in the production of forgings made of structural steel, stainless, heat-resistant and difficult-to-deform alloys, for perkova cast metal ingots and continuously cast billets in the deformed blank.
A well-known tool for radial forging, containing two pairs located in mutually perpendicular planes Boiko chetyrehsetovom forging device (see, for example, Japanese application No. 58-12088, class B 21 J 9/06, 9/02, 13/02, publ. 07.03.83).
The tool provides a high efficiency of the process due to intensive metal flow in the direction of the longitudinal axis of the workpiece when the quadripartite compression.
The disadvantage of this tool is a weak deformation study of cast metal structure and, hence, low quality forged metal.
Also known instrument for forging, comprising upper and lower Boiky with notches having inclined to the plane of the connector working side surfaces located crosswise (see USSR Author's certificate No. 393018, class B 21 J 13/02, publ. 10.08.73,, bull. No. 33).
When crafting this tool improves development and reduced anisotropy metal forgings compared to the hammering tool with a flat rabza the large broadening of the workpiece when the clamping her two strikers, and the lack of high quality metal.
In the proposed tool for radial forging the task by changing its design, to improve process performance and more intense deformation development of cast structure of the metal billet.
This object is achieved in that the tool for radial forging, containing two pairs located in mutually perpendicular planes of the heads with cut surfaces which are arranged crosswise, what's new is that Boiky have two pairs of displaced relative to each other along the longitudinal axis of the brisk business of inclined surfaces, each of which consists of adjacent to each other long and short surfaces (Fig.1). For example, the striker 3 (Fig.1) a pair of working surfaces and an nm offset from the pair of working surfaces md and ad along the longitudinal axis of this brisk and long working surfaces nm and ad adjacent to the short working surfaces and an md and are arranged crosswise. When closing Boykov 1-4 (Fig.1) inclined surfaces form two spaced crosswise of the rhombus abcd and ekmn.
Patented tool for radial forging work is satisfactory divorced strikers 1-4 and compresses all four sides. When exposed to the workpiece inclined working surfaces of the heads is its radial compression while turning one part of the deformation zone relative to another. From the effects of inclined be a'b' is the rotation part of the deformation zone in the direction of arrow q, and from the effects of inclined surfaces ad' dc' - rotating part of the deformation zone in the direction of arrow q’ in the opposite direction of the arrow q (Fig.2). When exposed to the inclined surfaces k'm and ek is the rotating part of the deformation zone in the direction of arrow u, and when exposed to the inclined surfaces nm' e'n' - rotating part of the deformation zone in the direction of arrow u' in the opposite direction of the arrow u (Fig.2). At the same time with a single radial reductions billet produce plastic shift by turning some parts of the deformation zone relative to the other, avoiding unidirectional fiberizing and reduce the anisotropy of the metal forgings and improve the working of the metal in the zones of the complicated deformation. Compared to forging two strikers quadrilateral forging tool proposed design provides a more intensive process.
For predotvrascheny 6-8 (Fig.3).
When the compression of the workpiece 9 large cross section of this design tool provides the segmentation of the flow of displacement of the metal in the deformation zone, improving this study cast metal structure, especially in the surface zone of the workpiece (Fig.4). In this case, the active role is played also a short inclined surfaces of the heads.
In Fig.4 the arrows indicate the direction of displacement of the metal at the introduction into the body billet short and long inclined working surfaces of the heads. Repeatedly changing the direction of metal flow during the introduction of the working surfaces in the body of the workpiece, and repeating plastic shifts plots of the deformation zone reduce the anisotropy of the metal and the improvement of the deformation study of its structure. Due to the four-way compression blanks provided more intensive stretching of the workpiece and, consequently, improving the performance of the forging process.
Tool for radial forging, containing two pairs located in mutually perpendicular planes of the heads with cut surfaces which are arranged crosswise, wherein b is values, each of which consists of adjacent to each other long and short surfaces, with the gnashing of Boykov long working surfaces form two spaced criss-cross diamond pattern.
FIELD: metal working.
SUBSTANCE: hard alloy matrix has casing, bushing pressed in the case and hard alloy insertion. Bushing has multifaced hole. Hard alloy insertion is composed by several sections made in form of trapezoidal-section prisms which have cut angles at their non-working edges. Number of sections corresponds to number of faces of item to be headed. Cuts of angles are made symmetrically to faces of working edge. Slits are made in several places of multifaced hole bushing at the ponts where faces cross each other.
EFFECT: improved resistance of matrix; simplified assembly.
3 cl, 1 dwg
FIELD: forging and forming processes and equipment, namely manufacture of elongated forgings with thickened portions and lateral branches.
SUBSTANCE: die set includes deforming punch, die with vertical parting, struts in the form of truncated pyramids having wedge-shaped slopes for mounting die; units for securing struts to supporting plate. Die is placed in struts with possibility of motion relative to them. Struts have double-sided mutually opposite slopes. Elastic member is placed under die. Maximum compression value of said elastic member by means of effort corresponding to effort of clamping die halves in struts is equal to value of descending die at forging process.
EFFECT: enhanced reliability and rigidity of die set.
2 cl, 1 dwg, 1 ex
FIELD: plastic working of metals, possibly operations for finish working of forgings of double-end box nut wrenches.
SUBSTANCE: die set includes upper and lower plates with guiding columns, punch for punching operation mounted on upper plate, stripper, lower die for punching, half-open trimming lower die and trimming punch. Trimming lower die is mounted on upper plate; it has cutting edge and cavity arranged behind collar of cutting edge and designed for freely placing forging of nut wrench. Trimming punch is mounted on lower plate and it has embracing supporting surface for fixing forging at trimming and straightening operations.
EFFECT: enhanced quality of forging.
9 dwg, 1 ex