Combined middle die for powder metallurgy

Abstract

The utility model discloses a combined middle die for powder metallurgy, which belongs to the technical field of middle dies for powder metallurgy and comprises a lower fixing sleeve, an inner die and an upper fixing sleeve, an assembly ring is integrally formed on the circumference of the inner die, the lower end of the inner die is embedded in the lower fixing sleeve, the assembly ring is positioned on the upper surface of the lower fixing sleeve, and the upper fixing sleeve is positioned on the lower surface of the inner die. A fixing groove corresponding to the assembling ring is formed in the upper fixing sleeve, the upper fixing sleeve is installed above the lower fixing sleeve, and the fixing groove is pressed on the upper surface of the assembling ring. The inner mold is matched with the lower fixing sleeve and the upper fixing sleeve and forms the combined middle mold after being locked through the fixing sleeve bolts, the lower fixing sleeve and the upper fixing sleeve serve as standing parts, and when the mold needs to be replaced, only the inner mold needs to be replaced, so that the mold universality and standardization are met, and meanwhile the mold replacement cost is reduced. And the manufacturing cost and the material cost of the mold are reduced, and the manufacturing period of the mold is shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder metallurgy middle molds, and in particular relates to a combined middle mold for powder metallurgy. Background Art

[0002] In the powder metallurgy molding process, the product is extruded and molded by the mutual movement of various mold components, and the middle mold is one of the core components. The powder metallurgy middle mold commonly used at present is an integrated design. When the molding part near the upper end of the middle mold reaches a certain amount of wear, it can only be scrapped as a whole.

[0003] In addition, in order to take into account the versatility and standardization of the mold frame, the outer dimensions of the middle mold are often designed according to the maximum product size that the tonnage press can produce. When producing most products, theoretically, such large outer dimensions are not required, which will cause unnecessary waste of mold materials and increase mold manufacturing costs.

[0004] Moreover, since the middle mold with an integral design often cannot be turned around for assembly and use, the service life of the middle mold is reduced. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a combined middle mold for powder metallurgy, which has the characteristics of meeting the universality and standardization of the mold, extending the service life of the mold, reducing the manufacturing cost of the mold, improving the assembly accuracy, and shortening the mold installation time.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combined middle die for powder metallurgy, comprising a lower fixed sleeve, an inner die and an upper fixed sleeve, wherein an assembly ring is integrally formed on the circumference of the inner die, the lower end of the inner die is embedded in the interior of the lower fixed sleeve, the assembly ring is located on the upper surface of the lower fixed sleeve, a fixing groove corresponding to the assembly ring is provided in the interior of the upper fixed sleeve, the upper fixed sleeve is installed above the lower fixed sleeve, and the fixing groove is pressed on the upper surface of the assembly ring.

[0007] In order to achieve the fixed connection between the upper fixing sleeve and the lower fixing sleeve, the upper fixing sleeve is further provided with a plurality of fixing countersunk holes, and the lower fixing sleeve is provided with fixing threaded holes corresponding to the fixing countersunk holes. The ends of the fixing sleeve bolts pass through the fixing countersunk holes and mesh with the fixing threaded holes.

[0008] In order to install the combined middle mold, further, the upper fixing sleeve is provided with a plurality of mounting countersunk holes, and the lower fixing sleeve is provided with mounting through holes corresponding to the mounting countersunk holes.

[0009] In order to enable the inner mold to be assembled in both directions, it can be turned over and used again after one end is worn, thereby extending the service life of the inner mold and reducing the cost of use. Furthermore, the assembly ring is located in the middle of the inner mold.

[0010] In order to achieve accurate positioning between the upper fixing sleeve and the lower fixing sleeve, further, a positioning groove is provided at the bottom of the upper fixing sleeve, and a positioning convex ring corresponding to the positioning groove is integrally formed on the upper part of the lower fixing sleeve.

[0011] In order to facilitate the hoisting of the combined middle mold, two symmetrically arranged hoisting threaded holes are further provided on the upper fixing sleeve.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The inner mold of the utility model cooperates with the lower fixing sleeve and the upper fixing sleeve, and forms a combined middle mold after being locked by the fixing sleeve bolts. The lower fixing sleeve and the upper fixing sleeve are used as spare parts. When the mold needs to be replaced, only the inner mold needs to be replaced. This reduces the manufacturing cost and material cost of the mold while meeting the universality and standardization of the mold, and shortens the production cycle of the mold;

[0014] 2. The assembly ring of the utility model is located in the middle of the inner mold, so that the inner mold can be assembled in both directions. After one end is worn, it can be turned over and used again, which prolongs the service life of the inner mold and reduces the use cost;

[0015] 3. The upper fixing sleeve of the utility model is provided with two symmetrically arranged lifting threaded holes, which is convenient for lifting the combined middle mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the inner mold of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the upper fixing sleeve of the utility model;

[0020] Figure 4 For this utility model Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0021] Figure 5 This is a schematic diagram of the structure of the lower fixing sleeve of the utility model;

[0022] Figure 6 For this utility model Figure 5 Schematic diagram of the cross-sectional structure at the middle BB;

[0023] Figure 7 This is a schematic diagram of the structure of the utility model after assembly;

[0024] In the figure: 1. fixing sleeve bolt; 2. lower fixing sleeve; 21. mounting through hole; 22. fixing threaded hole; 23. positioning convex ring; 3. inner mold; 31. assembly ring; 4. upper fixing sleeve; 41. mounting countersunk hole; 42. fixing countersunk hole; 43. lifting threaded hole; 44. fixing groove; 45. positioning groove; 5. middle mold fixing seat; 6. upper punch; 7. filling plate; 8. middle mold mounting bolt; 9. lower punch. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] See also Figure 1-7 The utility model provides the following technical solutions: a combined middle die for powder metallurgy, comprising a lower fixed sleeve 2, an inner die 3 and an upper fixed sleeve 4, wherein an assembly ring 31 is integrally formed on the circumference of the inner die 3, the lower end of the inner die 3 is embedded in the interior of the lower fixed sleeve 2, the assembly ring 31 is located on the upper surface of the lower fixed sleeve 2, a fixing groove 44 corresponding to the assembly ring 31 is provided in the interior of the upper fixed sleeve 4, the upper fixed sleeve 4 is installed above the lower fixed sleeve 2, and the fixing groove 44 is pressed on the upper surface of the assembly ring 31.

[0028] By adopting the above technical scheme, the inner mold 3 of the utility model cooperates with the lower fixed sleeve 2 and the upper fixed sleeve 4, and is locked by the fixed sleeve bolt 1 to form a combined middle mold. The lower fixed sleeve 2 and the upper fixed sleeve 4 are used as spare parts. When the mold needs to be replaced, only the inner mold 3 needs to be replaced. This reduces the manufacturing cost and material cost of the mold while meeting the universality and standardization of the mold, and shortens the production cycle of the mold.

[0029] Specifically, the upper fixing sleeve 4 is provided with a plurality of fixing countersunk holes 42, and the lower fixing sleeve 2 is provided with fixing threaded holes 22 corresponding to the fixing countersunk holes 42. The ends of the fixing sleeve bolts 1 pass through the fixing countersunk holes 42 and are meshed and connected with the fixing threaded holes 22.

[0030] By adopting the above technical solution, a fixed connection between the upper fixing sleeve 4 and the lower fixing sleeve 2 is achieved.

[0031] Specifically, the upper fixing sleeve 4 is provided with a plurality of mounting countersunk holes 41 , and the lower fixing sleeve 2 is provided with mounting through holes 21 corresponding to the mounting countersunk holes 41 .

[0032] The above technical solution is used to install the combined middle mold.

[0033] Example 2

[0034] The difference between this embodiment and the first embodiment is that, specifically, the assembly ring 31 is located in the middle of the inner mold 3 .

[0035] By adopting the above technical solution, the inner mold 3 can be assembled in both directions, so that after one end is worn, it can be turned over and used again, thereby extending the service life of the inner mold 3 and reducing the cost of use.

[0036] Example 3

[0037] The present embodiment is different from the first embodiment in that: specifically, a positioning groove 45 is provided at the bottom of the upper fixing sleeve 4 , and a positioning convex ring 23 corresponding to the positioning groove 45 is integrally formed on the top of the lower fixing sleeve 2 .

[0038] By adopting the above technical solution, accurate positioning between the upper fixing sleeve 4 and the lower fixing sleeve 2 is achieved through the cooperation between the positioning protruding ring 23 and the positioning groove 45 .

[0039] Example 4

[0040] The present embodiment is different from the first embodiment in that: specifically, the upper fixing sleeve 4 is provided with two symmetrically arranged lifting threaded holes 43 .

[0041] By adopting the above technical solution, it is convenient to hoist the combined middle mold.

[0042] The assembly steps of the utility model are as follows:

[0043] (1) Insert the inner mold 3 into the inner cavity of the lower fixed sleeve 2;

[0044] (2) Assemble the upper fixing sleeve 4 to the top of the lower fixing sleeve 2 and tighten it with the fixing sleeve bolts 1 to form a combined middle mold;

[0045] (3) Screw the hanging bolts into the hanging threaded holes 43 to hang the assembled middle mold onto the middle mold fixing base 5;

[0046] (4) After cooperating with the upper punch 6 and the lower punch 9, the middle die mounting bolt 8 is engaged with the threaded hole on the middle die fixing base 5 and tightened;

[0047] (5) Then install the filling plate 7 to complete the assembly of the combined middle mold.

[0048] To sum up, the inner mold 3 of the utility model cooperates with the lower fixing sleeve 2 and the upper fixing sleeve 4, and is locked by the fixing sleeve bolt 1 to form a combined middle mold. The lower fixing sleeve 2 and the upper fixing sleeve 4 are spare parts. When the mold needs to be replaced, only the inner mold 3 needs to be replaced, thereby meeting the universality and standardization of the mold while reducing the manufacturing cost and material cost of the mold and shortening the production cycle of the mold; the assembly ring 31 of the utility model is located in the middle position of the inner mold 3, so that the two directions of the inner mold 3 can be assembled, so that after one end is worn, it can be turned over and used again, extending the service life of the inner mold 3 and reducing the cost of use; the upper fixing sleeve 4 of the utility model is provided with two symmetrically arranged lifting threaded holes 43, which are convenient for lifting the combined middle mold.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A combined middle die for powder metallurgy, characterized in that: It includes a lower fixed sleeve, an inner mold and an upper fixed sleeve, wherein an assembly ring is integrally formed on the circumference of the inner mold, the lower end of the inner mold is embedded in the interior of the lower fixed sleeve, the assembly ring is located on the upper surface of the lower fixed sleeve, and a fixing groove corresponding to the assembly ring is provided in the interior of the upper fixed sleeve. The upper fixed sleeve is installed above the lower fixed sleeve, and the fixing groove is pressed on the upper surface of the assembly ring.

2. The combined middle die for powder metallurgy according to claim 1, characterized in that: The upper fixing sleeve is provided with a plurality of fixing countersunk holes, and the lower fixing sleeve is provided with fixing threaded holes corresponding to the fixing countersunk holes.

3. The combined middle die for powder metallurgy according to claim 2, characterized in that: The end of the fixing sleeve bolt passes through the fixing countersunk hole and is engaged with the fixing threaded hole.

4. The combined middle die for powder metallurgy according to claim 1, characterized in that: The upper fixing sleeve is provided with a plurality of mounting countersunk holes, and the lower fixing sleeve is provided with mounting through holes corresponding to the mounting countersunk holes.

5. The combined middle die for powder metallurgy according to claim 1, characterized in that: The assembly ring is located in the middle of the inner mold.

6. The combined middle die for powder metallurgy according to claim 1, characterized in that: A positioning groove is provided at the bottom of the upper fixing sleeve, and a positioning convex ring corresponding to the positioning groove is integrally formed on the top of the lower fixing sleeve.

7. The combined middle die for powder metallurgy according to claim 1, characterized in that: The upper fixing sleeve is provided with two symmetrically arranged lifting threaded holes.

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