A method of manufacturing forging extrusion

 

The invention relates to the processing of metals by pressure and can be used when the drop-forging hot forging. Original blank produced from a rod, rebuff, and then form a semi-finished product. When forming the semi-finished extruded rod and pre-form flange with dimensions in plan in the range of 0.9-1.0 of the corresponding dimensions on the plan are permanently stamped forgings. Then spend the final stamping with the displacement of the metal in the scrap angle 5-85othe vertical axis of the forging. The draught of the original piece can produce inserts with a shaped contact surface or movable in the radial direction of the ring. Prefabricated form for one, two or three of the transition. Depending on the purpose of the forging, extruding the rod may be solid or hollow. The result is the reduction of metal consumption. 7 C.p. f-crystals, 4 Il.

The invention relates to the processing of metals by pressure and can be used when the drop-forging hot forging.

A known method of manufacturing forging extrusion, including moulded draught in conical dies, extrusion conical rod with ignoreme the ing the stamping in the outdoor stamp with simultaneous extrusion of the rod and forming a flange forgings (Sokolov, H. L. Hot forming by extrusion. - M.: Mashinostroenie, 1967, 192 S. p. 83, 84, Fig.28).

The disadvantage of this method is its low flexibility. Only the forging of bodies of revolution with a simple configuration of the flange part can be obtained without saltanovka end Burr intermediate product in the body of the forging.

In addition, elements of the flange part forgings are formed only in the final open stream, which leads to additional consumption of metal that is displaced into the overflow.

The uncertainty of the ratio in between permanently stamped forging and semi-finished product makes it difficult to use the method to obtain forgings, other than those discussed in the known method.

A known method of manufacturing forging extrusion, including draught of the original billet, extrusion of a rod with a pre-forming thickening with dimensions in plan, exceeding the size of the plan are permanently stamped forgings, final forging open die (Sementi C. M. , Acero I. L., Volosov N. N. Advanced technology, equipment and automation of forging and stamping production of KAMAZ. - M.: Mashinostroenie, 1989, 304 S., ill., page 173-174, Fig.83).

The disadvantage of the two is the Lebanon.

The technical result in the method of manufacturing forging extrusion, including a draft of the original piece, forming a semi-finished product by extruding rod with the preliminary formation of the flange, the final open stamping, is achieved by the fact that the prefabricated form with the dimensions of the flange part in the plan in the range of 0.9-1.0 of the corresponding dimensions on the plan are permanently stamped forgings, and the final forging is carried out with a displacement of the metal in the scrap angle 5-85othe vertical axis of the forging.

The draught of the original piece carry on the inserts shaped contact surface.

Draft initial workpiece is carried out in movable in the radial direction of the ring.

The formation of semi-finished conducted in a single transition in the closed die.

The formation of the semi-finished product is carried out in two transitions, and the first transition form the final element of the rod with the dimensions of the final element of the rod permanently stamped forgings.

The formation of semi spend three transitions.

Squeeze the hollow rod.

Squeeze a continuous rod.

The formation of the material with sized in the range of 1.0 to 0.9 from the meet the th to the size permanently stamped forgings. This provides a solid base of semi-finished product in the stamp for final forming and reduces the consumption of metal. In addition, this approach enables to use on the stage of semi closed stamps. By forging in closed dies, there is a danger of formation of the end of the Burr. However, these dimensions mechanical Burr, located on the perimeter of the flange thickening, during the final stamping is displaced into the overflow, thereby eliminating saltanovka end of the Burr in the body of the forging.

The formation of the material with dimensions in plan, exceeding the size of the plan are permanently stamped forgings (as in the prototype), leads to excess consumption of metal and reloading equipment, so the upper range, equal to 1.0, is the largest from the point of view of economy of metal, resistance stamps and energy cost savings.

During the formation of the material with size less than 0.9m from the corresponding dimensions on the plan are permanently stamped forgings leads to uncertainty reaches the upper edge of the semi-finished product, which is the end of the Burr, and there is a danger of saltanovka Burr in the body of the forging.

Eviction meta is in the fin at an angle less than the 5oleads to rasklinivanie stamp and reloading equipment. In addition, difficult subsequent trimming Burr.

The optimal value of the angle of displacement of the metal in the scrap are within 25-65o.

If you want to run based on the element of the forging, upsetting the original piece carry on the inserts shaped contact surface.

In the manufacture of the circular forgings for additional savings metal draught spend movable in the radial direction of the ring.

Depending on the complexity of configuration forging, flange portion and the rod, for example straight or stepped, forming a semi-finished product is carried out in one or several transitions. When forming the semi-finished product in a few transitions to first form the final element of the rod with the dimensions of the final element of the rod permanently stamped forgings, on the next transition form the following from the terminal portion of the section of the rod, then the rod is formed finally. This approach is consistent forming elements of forging allows to reduce the consumption of the metal in the scrap for the final stamping, to reduce the clamping and increase the resistance of the stamps.

In the inachi transitions and used stamps before the final stamping uses a private stamp.

Comparative analysis of the proposed technical solution with the prototype shows that the inventive method of manufacturing forging extrusion differs from the prototype.

In the prototype form the semi-finished product dimensions flange part in more dimensions on the plan are permanently stamped forgings. Thus, due to the excess metal output end Burr beyond forgings.

In the proposed method, form a semi-finished product dimensions flange part in the plan in the range of 1.0 to 0.9 from the corresponding dimensions on the plan are permanently stamped forgings.

In the prototype, the final forging is carried out with a displacement of the metal in the scrap in the horizontal direction.

In the proposed method, the stamping is carried out with a displacement of the metal in the scrap angle 5-85othe vertical axis of the forging. This allows you to send end Burr to Burr.

These distinctive features provide the ability to obtain stable forging extrusion with minimal material costs. Thus, this solution meets the criterion of "novelty".

The analysis of patents, patents and scientific and technical information did not reveal the use of new MoE technical solution meets the criterion of "inventive step".

In Fig. 1 presents technological transitions stamping of Fig.2 - on the beginning and on the right end of the precipitation, Fig.3 - left start, and the right end-forming semi-finished product in closed die; Fig.4 - left start, and the right end of the final forging open die.

A method of manufacturing a hollow flange forgings is implemented as follows.

Monotonous forgings get a few transitions, for example three, in which the source of the workpiece 1, obtained from a rod, rebuff, receiving the workpiece 2, then form a semi-finished product 3, then, by deforming the semi-finished product 3, get permanently stamped forgings 4 overflow 5.

The source of the workpiece 1, obtained from a rod, rebuff between the inserts 6 and 7. Inserts can be flat or shaped contact surface. In the particular case to obtain a strictly defined lateral surface after precipitation, the precipitate is carried out in the ring.

Received in the first passage of the workpiece 2 is passed to the stamp of the second transition, which consists of a matrix 8, the punch 9 and the ejector 10. Upset the workpiece 2 is installed in the cavity of the matrix 8. When the movement of the press slide down the punch 9 in the matrix 8 deforms upset the workpiece 2, forming prefabricado transition consisting of a matrix 11, the punch 12 and the ejector 13. When the movement of the press slide down the punch 12 deforms the semi-finished product 3 in the matrix 11, the result is finally stamped forgings 4 fin 5. After completion of process of deformation of the press slide is lifted up, and finally stamped forgings 4 is removed from the matrix 11 of the ejector 13.

A specific example of the forging shaft-pinion steel HTA GOST 4543-71.

The original billet with a diameter of 100 mm and a height of 135 mm is heated in an induction heater to forging temperature, served in the block stamp heat punching press in the first position of stamping and rebuff to the diameter of the sphere equal to 127 mm is Mounted the workpiece placed in the stream for extrusion to form a semi-finished product with a flange diameter of 132 mm and a shaft diameter of 41 mm and Then in the final stream to produce the complete formation of the head flange part forgings diameter 132,5 mm and the calibration rod parts at the same time to avoid saltanovka end Burr spend the displacement of the metal in the scrap at 45o.

Compared with the prototype of the proposed method for the manufacture of forgings by squeezing more economical.

2. The method according to p. 1, characterized in that the draught of the original piece carry on the inserts shaped contact surface.

3. The method according to p. 1, characterized in that the draught of the original billet is carried out in movable in the radial direction of the ring.

4. The method according to p. 1, characterized in that the formation of semi-finished conducted in a single transition in the closed die.

5. The method according to p. 1, characterized in that the formation of the semi-finished product is carried out in two transitions, and the first transition form the final element of the rod with the dimensions of the final element of the rod permanently stamped forgings.

6. The method according to p. 1, characterized in that the formation of semi spend three transitions.

7. The method according to p. 1, characterized in that the extruded hollow rod.

8. The method according to p. 1,

 

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FIELD: plastic working of metals in different branches of industry.

SUBSTANCE: apparatus includes supporting plate and housing with openings and duct. Punch, upper and lower stops are mounted in housing. Said stops may be in contact with blank by their flat notched surface. Movable lower stop is arranged in openings of housing and on supporting plate; it engages with said plate by its smooth surface. Hydraulic cylinder joined by its rod with lower stop is mounted on supporting plate. Upper stop is in the form of cylinder mounted in housing in such a way that it restricts together with punch inner cylindrical cavity of hydraulic system providing motion of lower stop. Said hydraulic system also includes duct of housing and hydraulic cylinder.

EFFECT: enlarged manufacturing possibilities of apparatus due to increased range of changing relation of shear deformation to compression deformation of blank.

2 dwg

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