CN206550146U - A kind of cold extrusion device of spiral bevel gear - Google Patents

Abstract

The utility model is the cold extrusion device of spiral bevel gear, is related to cold extruding technique, and especially a kind of reference cone angle is less than the tooth form cold extrusion device of 45 ° of spiral bevel gear, belongs to machinery manufacturing technology field.The device is main by hydraulic machine, and upper mould assembly and lower mould assembly are constituted, and rational in infrastructure, assembling is easy, and carrying out cold extrusion using the device processes easy to adjust, good manufacturability.

Description

A cold extrusion device for spiral bevel gear

technical field

The utility model relates to cold extrusion technology, in particular to a tooth-shaped cold extrusion device for a spiral bevel gear with a sub-cone angle less than 45°, and belongs to the technical field of mechanical manufacturing.

Background technique

Cold extrusion is the process of placing the metal blank in the cold extrusion die cavity (usually a die), at room temperature, applying pressure to the blank through the punch fixed on the press, so that the metal blank produces plastic deformation to obtain parts. method. Cold extrusion is one of the chip-free and chip-less parts processing technologies, and it is an advanced process method in metal plastic processing. Spiral bevel gears are important parts in machinery. Such parts have complex shapes and have been produced by milling. This traditional processing method has many procedures, low production efficiency, large material loss, and high cost, which is difficult to meet the needs of mass production. Cold extrusion technology has the advantages of high production efficiency, low material consumption, and high mechanical properties of products. Applying it to the production of spiral bevel gears can not only greatly reduce the production cost, but also improve the mechanical properties of the parts, and obtain high-quality products with high dimensional accuracy and small surface roughness. When the sub-cone angle of the spiral bevel gear is greater than 45°, it is only necessary to push the extruded part from the bottom to the top when the cold-extruded tooth is formed and ejected. However, when the sub-cone angle of the spiral bevel gear is less than 45°, when the cold-extruded tooth is formed and ejected from the die, the extrusion must be rotated from the bottom to the top while pressing the gear helix angle to make the extrusion The part is completely released from the die.

Contents of the invention

In order to solve this problem, the utility model provides a cold extruding device of a spiral bevel gear, which can cold extrude a spiral bevel gear with a sub-cone angle less than 45°.

The technical scheme adopted in the utility model is:

The cold extrusion device of the spiral bevel gear is mainly composed of a hydraulic machine tool, an upper die assembly and a lower die assembly. The hydraulic machine tool is a vertical four-column two-cylinder hydraulic machine, which has an upper hydraulic cylinder, a mobile table, a lower hydraulic cylinder and a workbench. The upper mold assembly is mainly composed of an upper mold and an upper template. The lower mold assembly is mainly composed of a large flange, a lower mold, a lower mold base, a guide column, a track assembly and a lower template. The track assembly is mainly composed of a small flange, a track body, a push rod and a shaft coupling. The lower mold base has a guide column installation hole, a cylinder with a cutout, an upper cylinder hole and a lower cylinder hole. The lower template has circular holes with cutouts. The track body has a square hole, a spiral groove, a cylinder I, a cylinder II and a mounting hole for a push rod. Described coupling has round hole I, cylindrical pin hole and lower hydraulic cylinder connecting hole.

The square head of the push rod fits with the square hole, and the round head of the push rod fits with the push rod installation hole. The cylinder II fits with the circular hole I. The small flange is connected with the coupling by three screws. The track body can rotate smoothly with the coupling. The cylindrical pin hole of the coupling is connected with the lower hydraulic cylinder through a cylindrical pin.

The lower mold is in interference fit with the upper cylindrical hole. The cylinder I is in clearance fit with the lower cylinder hole. The cylinder with the cutout is in interference fit with the circular hole with the cutout. The lower formwork is fixed on the workbench. The large flange is connected with the lower formwork by three screws. The guide post is fixed in the guide post installation hole. The front end of the guide column is inserted into the spiral groove.

The upper mold is in interference fit with the upper template. The upper mold assembly is fixed on the mobile platform. The central axis of the upper mold coincides with the lower mold.

The beneficial effects of the utility model are:

The cold extrusion device of the spiral bevel gear is reasonable in structure and easy to assemble, and it is convenient to adjust for cold extrusion processing and has good manufacturability.

Description of drawings

Below in conjunction with the figure of the present utility model further explanation:

Fig. 1 is a schematic structural view of the device of the present invention.

Fig. 2 is an exploded view of the device of the present invention.

Fig. 3 is a schematic structural view of the hydraulic machine tool.

Fig. 4 is an exploded view of the upper mold assembly.

Fig. 5 is an exploded view of the lower mold assembly.

Figure 6 is an exploded view of the track assembly.

Fig. 7 is a schematic structural view of the lower mold base.

Fig. 8 is a structural schematic diagram of the lower template.

9 and 10 are structural schematic diagrams of the track body.

11 and 12 are structural schematic diagrams of the coupling.

In the figure, 1. Hydraulic machine tool, 2. Upper mold assembly, 3. Lower mold assembly, 4. Upper hydraulic cylinder, 5. Mobile table, 6. Lower hydraulic cylinder, 7. Workbench, 8. Upper mold, 9 .Upper template, 10. Large flange, 11. Lower mold, 12. Lower mold base, 13. Guide column, 14. Track assembly, 15. Lower template, 16. Track body, 17. Ejector, 18. Coupling Device, 19. guide post installation hole, 20. cylinder with cutout, 21. upper cylinder hole, 22. lower cylinder hole, 23. circular hole with cutout, 24. square hole, 25. spiral groove, 26. cylinder I, 27 .Cylinder II, 28. Ejector pin mounting hole, 29. Round hole I, 30. Cylindrical pin hole, 31. Lower hydraulic cylinder connecting hole, 32. Small flange.

detailed description

The cold extrusion device of the spiral bevel gear is mainly composed of the hydraulic machine tool 1 , the upper die assembly 2 and the lower die assembly 3 . See Figure 1 and Figure 2.

The hydraulic machine tool 1 has the upper hydraulic cylinder 4 , the moving table 5 , the lower hydraulic cylinder 6 and the workbench 7 . See Figure 3.

The upper mold assembly 2 is mainly composed of the upper mold 8 and the upper template 9 . See Figure 4.

The lower mold assembly 3 is mainly composed of the large flange 10 , the lower mold 11 , the lower mold base 12 , two guide columns 13 , the track assembly 14 and the lower template 15 . See Figure 5.

The track assembly 14 is mainly composed of the small flange 32 , the track body 16 , the push rod 17 and the coupling 18 . See Figure 6.

The lower mold base 12 has two guide post mounting holes 19 uniformly distributed about the central axis, the notched cylinder 20 , the upper cylinder hole 1 and the lower cylinder hole 22 . See Figure 7.

The lower template 15 has the circular hole 23 with a cutout. See Figure 8.

The track body 16 has the square hole 24 , two spiral grooves 25 uniformly distributed about the central axis, the cylinder I26 , the cylinder II 27 and the ejector rod installation hole 28 . See Figure 9 and Figure 10.

The shaft coupling 18 has the circular hole I 29 , the cylindrical pin hole 30 and the lower hydraulic cylinder connecting hole 31 . See Figure 11 and Figure 12.

The square head of the push rod 17 fits with the square hole 24 , and the round head of the push rod 17 fits with the push rod installation hole 28 .

The cylinder II 27 cooperates with the circular hole I 29 . The small flange 32 is connected with the coupling 18 by three screws. The track body 16 can rotate smoothly with the coupling 18 . The straight pin hole 30 of the coupling 18 is connected with the lower hydraulic cylinder 6 through a straight pin.

The lower mold 11 is in interference fit with the upper cylindrical hole 21 . The cylinder I 26 is in clearance fit with the lower cylinder hole 22 . The notched cylinder 20 is in interference fit with the notched circular hole 23 . The large flange 10 is connected with the lower template 15 by three screws. The two guide posts 13 are respectively fixed in the two guide post installation holes 19 . The front end of the guide column 13 is inserted into the spiral groove 25 . The lower mold assembly 3 is fixed on the workbench 7 through the lower template 15 .

The upper mold 8 is in interference fit with the upper template 9 . The upper mold assembly 2 is fixed on the mobile platform 5 . The central axis of the upper mold 8 coincides with the lower mold 11 .

The machine tool adjustment steps are as follows:

(1) Assembling the upper die assembly 2 and the lower die assembly 3 respectively, the upper die assembly 2 is fixed on the mobile platform 5, and the lower die assembly 3 is passed through the lower template 15 is fixed on the workbench 6, and the coupling 18 is connected with the lower hydraulic cylinder 6 through a cylindrical pin.

(II) Adjust the center positions of the upper mold assembly 2 and the lower mold assembly 3 so that the central axes of the upper mold 8 and the lower mold 11 coincide.

(III) Adjust the vertical position of the mobile platform 5 .

(IV) Setting the working parameters of the hydraulic machine tool 1 .

The cold extrusion processing steps are as follows:

(1) Put the metal blank to be extruded in the lower die 11.

(II) The hydraulic machine tool 1 starts extrusion mode. The upper hydraulic cylinder 4 moves downward, the moving table 5 moves downward, and the upper mold assembly 2 moves downward. Under the pressure of the upper mold 8, the metal blank flows in the lower mold 11 towards the tooth groove of the lower mold 11 and the lower outlet of the mold, and the material at the lowermost end of the center of the metal blank flows to the direction of the ejector pin 17. head. After being extruded in place, the upper hydraulic cylinder 4 moves upward, the mobile table 5 moves upward, and the upper mold assembly 2 moves upward and returns to the initial position.

(III) The hydraulic machine tool 1 starts the ejection mode. The lower hydraulic cylinder 6 moves upward, and the track assembly moves upward. Since the lower mold base 12 and the two guide columns 13 are fixed, the track body 16 rotates while moving upward. , the ejector rod 17 rotates together with the extruded part while moving upwards, and the extruded part is ejected and successfully demolded.

(IV) Take out the extruded part, the lower hydraulic cylinder 6 moves downward, the track assembly 14 moves downward, and returns to the initial position. Complete a production process cycle.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also make appropriate changes and modifications to the above embodiment. Therefore, the utility model is not limited to the specific implementation manners disclosed above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims (1)

1. A cold extrusion device of a spiral bevel gear mainly consists of a hydraulic machine tool, an upper mold assembly and a lower mold assembly, and is characterized in that: said hydraulic machine tool is a vertical four-column two-cylinder hydraulic press with an upper hydraulic cylinder, mobile table, lower hydraulic cylinder and workbench; the upper mold assembly is mainly composed of upper mold and upper template; the lower mold assembly is mainly composed of large flange, lower mold, lower mold base, guide column, track assembly and The lower formwork is formed; the track assembly is mainly composed of a small flange, a track body, a push rod and a coupling; the lower mold base has a guide post mounting hole, a cylinder with a cutout, an upper cylinder hole and a lower cylinder hole; The lower template has round holes with cutouts; the track body has square holes, spiral grooves, cylinder I, cylinder II and ejector rod installation holes; the coupling has round holes I, cylindrical pin holes and lower hydraulic cylinder connection holes The square head of the ejector rod is matched with the square hole, and the round head of the ejector rod is matched with the ejector rod installation hole; the cylinder II is matched with the round hole I; the track body can be matched with the described The shaft coupling rotates smoothly; the straight pin hole of the shaft coupling is connected with the lower hydraulic cylinder through a straight pin; the lower mold is in interference fit with the upper cylindrical hole; the cylinder I and the The lower cylindrical hole is clearance fit; the cylinder with notch is interference fit with the round hole with notch; the lower template is fixed on the workbench; the guide column is fixed in the guide column installation hole; the upper mold interference fit with the upper mold; the upper mold assembly is fixed on the moving table; the central axis of the upper mold coincides with the lower mold.