Method for production of puncheons for pressing cup-type items
FIELD: technological processes.
SUBSTANCE: half-finished product with business end is obtained from workpiece and processed. It undergoes thermal processing and polishing. Then cog profile is worked out by method of electroerosion on the lateral surface of business end of half-finished product.
EFFECT: improved quality of obtained item.
The invention relates to the processing of metals by pressure and can be used for the manufacture of punches extrusion product type glass having a toothed profile in the inner cavity, such as buildings shrapnel ammunition.
A known method of manufacture of forging dies for extrusion products type glass inner toothed profile (see patent RU 2080550 C1, F42B 12/24, 27.05.1997,).
However, the known method does not provide the manufacture of the toothed profile of the tool is of good quality, because its manufacture is made by milling and due to the low roughness of the tooth surface during extrusion products have significant specific efforts, which reduces the resistance of the punch and the quality of the gear profile.
Application after milling grinding toothed profile of the punch is difficult due to possible differences in the angular divergence of the teeth during processing even in the centres, but also because of the small size of teeth, size "L" and radius "R" (figure 2).
Task to be solved by the present invention is directed, is to eliminate these shortcomings.
This is achieved by a method for manufacturing of forging dies for extrusion products type of glass with an inner toothed profile includes the segment of the workpiece, obtaining a semi-finished product, with working parts, it is the processing, heat treatment, grinding semi-finished and further forming on the side of the working part of the gear profile by the method of electric discharge machining.
A significant sign of "... the subsequent formation on the side of it (punch) working part serrated profile by the method of electric discharge machining allows you to provide the technical result increased operational qualities of a punch for manufacturing toothed profile with high purity processing, the accuracy of the angular positioning of the teeth, reduction of specific efforts during extrusion products of type a glass of obtaining high-quality toothed profile of the products and increase tool life.
The ability to achieve a technical result - the quality of manufacture of the toothed profile of the punch with high purity processing - see the book "Dimensional electrical processing of materials", edited by Awholesale, Moscow Higher school", 1978, p.69, 15th row from the top "...it is possible to ensure high precision machining", p.70, 5th line from the bottom "... providing high quality machined surfaces".
The toothed profile of the punch is made on Japanese equipment - coordinate-bonding wire EDM installation CNC SODICK company - technical specifications are attached.
The increment angle - 0,00833...° (20") Angular accuracy - 30" Precision machining - within 7-10 mm to 300 mm stroke axial feed The best surface roughness processing to 0.025 m Ra (class 12)
Figure 1 shows the punch, the method of manufacture of which is described in the present invention,
figure 2 - node 1 in figure 1;
figure 3 is a view As in figure 2.
The method is as follows.
Cut from rod billet handle surface and the working part "P" of the prefabricated plug, conduct heat treatment and surface grinding and working part "P". Then spend the formation of the toothed profile "P" copper electrode EDM processing.
Thus, when carrying out the claimed invention, the following conditions are true:
- means embodying the invention in its implementation, are intended for use in industry, namely in the manufacture of forging dies for extrusion products type of glass used, in particular, in the manufacture of products with internal toothed profile housings shrapnel ammunition;
for the claimed invention in the form in which it is characterized in the claims, is confirmed in moznosti its implementation using the described tools and methods;
- means embodying the invention in its implementation, is able to obtain the technical result;
- therefore, the claimed invention meets the condition of paternopoli and industrial applicability.
Proof is the fact the manufacture of punches and products - buildings shrapnel ammunition Federal state unitary enterprise "plant them. Sergo"
The method of manufacture of forging dies for extrusion products type of glass with an inner toothed profile, characterized in that it includes the segment of the workpiece, obtaining a semi-finished product, with working parts, processing, heat treatment, grinding semi-finished and further forming on the side of the working part of the gear profile by the method of electric discharge machining.
FIELD: restoration works, possibly in machine engineering and repairing shops of agricultural-industrial complex.
SUBSTANCE: method comprises steps of applying copper layer onto surface of opening of slide valve body made of cast iron by electric spark working; then removing applied layer of copper till thermal diffusion zone and applying layer of low- or medium-carbon steel onto surface of slide. Such layer is applied by electric spark working in apparatus with discharge energy 0.81 - 1.66 J at electrode feed in range 0.2 - 0.4 mm/rev and at revolution number of slide 8 - 16 rev/min. Then lands of slide are smoothly rolled and lapped, and film of brass is applied onto them by anti-friction abrasive free finish working.
EFFECT: increased resource of slide valve.
FIELD: plastic working of materials, preferably metals, possibly in machine engineering for making tools for forming processes.
SUBSTANCE: method comprises steps of preliminarily making of easy-to-work material model of one member of tool in scale 1:1; making concrete form for producing reinforced concrete at using said model as bottom of form; applying layer of liquid material containing filler onto model; placing reinforcement in concrete form; then filling form with concrete; after curing of concrete, removing form and applying liquid material onto working surface of formed member of tool; using formed first member of tool and additional concrete form for making second member of tool from concrete kind no less than 500 and using as filler quartz sand, basalts or gneisses.
EFFECT: simplified low-cost process of manufacturing forming tool.
8 cl, 3 ex
FIELD: technological processes.
SUBSTANCE: for parts production cold-upsetting tool is used in the form of multi-position unit. Unit includes five positions and contains puncheons, thrusters, assembled matrixes and strippers. Assembled matrix in the fourth position is installed motionlessly and is equipped with reduction step at the insert. Stripper of the fourth position is arranged with the opening, in which spring-loaded puncheon is installed. Cut billet is subjected to setting and calibration with leveling of butt ends and formation of conical marks. By means of further billet setting head is created. Then opening is pressed out in the billet and its external diameter is reduced with formation of step. Reduction of diameter is carried out in motionless matrix with insert, which has reduction step. For that purpose billet is displaced until it thrusts stripper with spring-loaded puncheon with its butt-end. Puncheon is installed in billet pressed out opening. Later billet is displaced together with puncheon and stripper via reduction step of matrix. After that billet opening is interweaved.
EFFECT: expansion of technological resources.
2 cl, 4 dwg
FIELD: technological processes.
SUBSTANCE: for one technological operation two types of pressing are carried out. As one type direct pressing of metal is used from container to its exit via calibrating zone. The second type is equal-channel angular pressing with provision of shift deformations in metal. Direct pressing is carried out prior to angular pressing. Shift deformations at angular pressing are provided immediately after metal exit from calibrating zone of direct pressing. Pressing is performed in the device that contains puncheon, matrix with two crossing channels and container. Container is installed above the matrix. Container cavity forms inlet part of vertically installed matrix channel. Area of inlet part cross section exceeds cross section area of vertically installed channel. The latter is arranged in the form of calibrating belt for direct pressing of metal from container. Height of belt makes 4-10 mm, and its diameter is equal to diameter of matrix second channel.
EFFECT: production of long-length items with high mechanical properties from different structural materials with simultaneous reduction of power intensity.
6 cl, 4 dwg, 3 ex
FIELD: construction equipment.
SUBSTANCE: rod ends are made with thickenings which have screw. For rods joining joiner is used with inner screw. Thickenings on rod ends are received on forging press fitted with equipment for cold heading of reinforcing rod ends. As stated device for disembarkation forging die is used, having longitudinal channel along the length for operation security with long reinforced rods.
EFFECT: provision of process capability widening of used equipment with serviceability and economic feasibility preservation.
20 cl, 12 dwg
SUBSTANCE: forging is performed in several passes by means of an upper flat and a lower cut out strikers. The lower striker has an impression in a shape of a scalene triangle. During the first pass a blank by compression is shaped into a scalene triangle with an obtuse angle 100-105° and a lesser acute angle 29-34°. During the following passes the blank is placed in the same strikers with support of a lesser side of the triangle of its cross section on a bigger side of a scalene triangle of cross section of the impression of the lower striker.
EFFECT: risk of defect formation is excluded.
12 dwg, 6 ex
FIELD: pressure shaping; manufacture of blanks from materials at preset structure including submicro-crystalline structure and nano-crystalline structure at respective level of physico-mechanical properties.
SUBSTANCE: proposed method consists in successive deformation cycles of initial blank by compression in height, thus obtaining blank with lateral faces. Proposed method ensures smooth plastic flow of material of blank in opposite directions along axis perpendicular to direction of application of deformation force. Each deformation cycle includes placing the blank in device, subjecting it to deformation, withdrawing the blank from device and re-setting for next cycle. Device proposed for realization of this method has working part with cavity and upper and lower punches. Working cavity consists of two parts: upper and lower. Lower part is widened along one of its horizontal axes.
EFFECT: enhanced homogeneity of ultrafine-grained structure at improved mechanical properties.
9 cl, 4 dwg, 1 tbl, 1 ex
FIELD: plastic working of metals, possibly ingot and billet forging in forging presses and in radial-squeezing machines.
SUBSTANCE: four strikers are mounted in holders having inclined planes supporting anti-friction plates. Holders of upper and lower strikers are joined through kinematics links holders of lateral strikers. Centering guides are mounted on inclined planes of holders of upper and lower strikers or on inclined planes of holders of lateral strikers. Centering guides are arranged in centering grooves restricted by walls of grooves of lateral striker holders or holders of upper and lower strikers and lateral planes of respective anti-friction plates. Apparatus also includes lateral transferring guides with F-shaped cross section. Width of working surface of each striker consists 0.5 - 0.9 of width of its supporting surface. Relation S1/S2 of total surface area of contact of anti-friction plates of holders of lateral strikers and anti-friction plates of holders of upper and lower strikers in closed apparatus (S1) and total surface area of projections of working surfaces of lateral strikers on lengthwise symmetry plane of apparatus (S2) exceeds value 2.5.
EFFECT: increased useful life period of apparatus.
2 cl, 7 dwg
FIELD: plastic working of metal, possibly manufacture of hollow thin-wall parts.
SUBSTANCE: method comprises steps of producing initial blank; calibrating it; then pressing it out and drawing. Near-bottom cylindrical portion of wall and bottom portion are shaped in die. Diameter of said die is less than diameter of part by value of elastic deformation of wall of near-bottom portion of part.
EFFECT: improved quality of ready part.
4 dwg, 1 ex
FIELD: plastic working of metals, possibly manufacture of rod like fastening articles with heads having curvilinear supporting surface, such as clamp bolts for joining rails of railway road.
SUBSTANCE: cutting off operation is realized by means of tool having die, punch and knocking out member. Rod portion of blank of rod article is placed in hole of die having recess. At initial stage of cutting off operation by action of punch upon end face of head the last is embedded into cut-off die. Then simultaneously punch and cutting edges of die are cut into body of head at clamping cut-off metal between end surfaces of punch and die. Said cut-off metal is separated from head by pushing rod article through opening of punch. Cutting edges of die are cut into bode of head by depth consisting of 0.65 - 0.80 of height of article head while preventing contact of faces of head part placed between cutting edges of die with die surface. Distance between cutting edges of die providing cutting-off of mutually opposite faces of head consists of 0.95 - 0.99 of similar distance between cutting edges of punch. Height of die recess consists of 0.65 - 0.80 of head height.
EFFECT: improved quality of articles, enhanced strength of tool.
2 cl, 4 dwg
FIELD: plastic working of metals, possibly production of forged pieces.
SUBSTANCE: apparatus for making forged pieces having length to diameter relation more than 3 includes power hydraulic cylinder on plunger of which upper striker is mounted. Lower striker is mounted in rotary mechanism. The last is in the form of kinematics pair having gear wheel and racks rigidly secured to plungers of hydraulic cylinders. Apparatus also includes second power hydraulic cylinder whose plunger is mounted in gear wheel with possibility of axial motion and rigidly joined with lower striker. Both power hydraulic cylinders separately through pipelines and throttles are communicated with respective hydraulic cylinders of rotary mechanism.
EFFECT: improved design of apparatus, increased degree of plastic deformation of blank at its single mounting operation in apparatus.
FIELD: plastic working of metals, possibly realization of blank working operations designed for developing high technology of thermo-mechanical working.
SUBSTANCE: apparatus includes housing where lower stop and both movable relative to housing punch and upper stop are arranged. Said stops have notched surfaces for engaging with blank and their ends are in contact respectively with punch and supporting plate. Stops may move relative to punch and supporting plate in mutually opposite directions normal relative to axis of housing. Apparatus is also provided with two wedges. Housing may move relative to supporting plate and it includes two annular grooves arranged in upper and lower parts of housing and designed for placing said wedges. Upper and lower stops form with wedges wedge pairs.
EFFECT: simplified design of apparatus, increased efforts applied to blank.
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