Split plug type die for pressing hard alloy dry bag

Abstract

The utility model relates to a split plug type die for pressing a hard alloy dry bag, which comprises a female die, a plug taper sleeve, a plug core sleeve and a core rod, the female die is provided with a female die cavity, the plug taper sleeve is matched in the female die cavity, the plug taper sleeve is provided with a through hole, one end of the plug taper sleeve is provided with an inner conical surface, and the plug core sleeve is assembled on the inner conical surface. The outer conical surface of the plug core sleeve is matched with the inner conical surface of the plug taper sleeve, after matching, the upper end face of the plug core sleeve is flush with the upper end face of the plug taper sleeve, and the inner through hole of the plug core sleeve is matched with the core rod. The inner shape and the outer shape of the machined hard alloy soft blank are both special-shaped, and machining operation of the inner shape and the outer shape can be completed only through one-time clamping; the same plug supports the core rod and the core sleeve which are used for fixing the diameter female die and the length of the pressed blank, and the core rod and the core sleeve have high universality and are not limited to be matched with a certain specific plug; the plug does not need to be taken out completely, and die damage is avoided; the requirements of all pressed blanks with different lengths can be met only by manufacturing a general core rod; when the hard alloy dry bag is formed, the core rod cannot be bent.

Description

Technical Field

[0001] The utility model relates to a split plugging type die for pressing a hard alloy dry bag, which is used for performing dry bag forming on unpressed powder materials and belongs to the technical field of hard alloy preparation. Background Art

[0002] In the molding of cemented carbide dry bags, the length of the mold is generally fixed. In order to mold billets of different lengths, a common method is to make plugs of different lengths. If the inner hole needs to be pressed, a core rod is required, and the plug also needs to have an inner hole.

[0003] Different lengths of blanks are matched with core rods of different lengths, and corresponding inner hole plugs need to be configured. This results in the need to produce a large number of molds (including dry bag female molds) to meet the needs of different products. The plugs need to be knocked out and replaced repeatedly, causing damage to the molds and waste of labor costs.

[0004] At the same time, core rods of various lengths are prone to bending during pressing, resulting in the inability to form the pressed blanks or even damage to the equipment. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the prior art and provide a split plugging die for pressing a hard alloy dry bag.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] The split plug-type mold for pressing a cemented carbide dry bag is characterized in that it comprises a female mold, a plug cone sleeve, a plug core sleeve and a core rod, the female mold has a female model cavity, the plug cone sleeve is fitted in the female model cavity, the plug cone sleeve is provided with a through hole, one end of the plug cone sleeve has an inner cone surface, the plug core sleeve is fitted on the inner cone surface, the outer cone surface of the plug core sleeve is matched with the inner cone surface of the plug cone sleeve, after matching, the upper end surface of the plug core sleeve is flush with the upper end surface of the plug cone sleeve, and the inner through hole of the plug core sleeve is matched with the core rod.

[0008] Furthermore, in the above-mentioned split plugging mold for pressing the cemented carbide dry bag, the female mold cavity is circular or square.

[0009] Furthermore, in the above-mentioned split plug-type mold for pressing a cemented carbide dry bag, the outer shape of the plug cone sleeve is interference fit or clearance fit with the female model cavity.

[0010] Furthermore, in the above-mentioned split plug-type mold for pressing a cemented carbide dry bag, the inner cone surface of the plug cone sleeve has a straight section.

[0011] Furthermore, in the above-mentioned split plugging mold for pressing the cemented carbide dry bag, the inner through hole of the plugging core sleeve and the outer shape of the core rod are clearance-matched.

[0012] Furthermore, in the above-mentioned split plugging mold for pressing the cemented carbide dry bag, the length of the core rod is smaller than the length of the female mold.

[0013] Furthermore, in the above-mentioned split plug-type mold pressed by the cemented carbide dry bag, the material of the female mold is polyurethane, the material of the plug cone sleeve and the plug core sleeve are both metal, and the material of the core rod is metal, and its hardness is higher than the hardness of the plug cone sleeve and the plug core sleeve.

[0014] Compared with the prior art, the present invention has significant advantages and beneficial effects, which are specifically embodied in the following aspects:

[0015] ① The utility model is a split plug type mold for processing a hard alloy soft blank with both inner and outer shapes. The inner and outer shapes can be processed by only one clamping operation; the same plug can support a core rod with a fixed diameter female mold and a fixed length of the pressed blank, which greatly reduces the number and cost of mold opening;

[0016] ② The core sleeve has strong versatility and is not limited to matching with a specific plug. There is no need to completely remove the plug, which greatly reduces labor intensity and avoids damage to the mold. There is no need to make a large number of core rods, only universal core rods are needed to meet the needs of all different lengths of compacts, greatly reducing production costs.

[0017] ③ When the cemented carbide dry bag is formed, the core rod will not bend, ensuring the smooth forming of the pressed blank.

[0018] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the specific implementation of the utility model. The purpose and other advantages of the utility model can be achieved and obtained by the structures specifically pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 : A schematic diagram of the structure of the split plugging mold of the utility model;

[0021] Figure 2 : Schematic diagram of the structure of the female mold;

[0022] Figure 3 : Schematic diagram of the structure of the plug cone sleeve;

[0023] Figure 4 : Schematic diagram of the structure of the plug core sleeve;

[0024] Figure 5 : Schematic diagram of the structure of the core rod. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the utility model.

[0026] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the utility model, directional terms and order terms are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] like Figures 1 to 5 As shown, the split plug-type mold for pressing cemented carbide dry bags comprises a female mold 1, a plug cone sleeve 2, a plug core sleeve 3 and a core rod 4. The female mold 1 has a female model cavity 5. The female mold outer shape 6 is adjusted according to the needs of the dry bag press. The plug cone sleeve 2 is fitted in the female model cavity 5. The female model cavity 5 is round or square. The plug cone sleeve outer shape 8 is interference fit or clearance fit with the female model cavity 5. The plug cone sleeve 2 is provided with a through hole 9, one end of which has an inner cone surface 10, and the inner cone surface 10 has a straight section 11. The plug core sleeve 3 is assembled at the inner cone surface 10, and the outer cone surface 14 of the plug core sleeve 3 is matched with the inner cone surface 10 of the plug cone sleeve 2. After matching, the upper end face 16 of the plug core sleeve is flush with the upper end face 12 of the plug cone sleeve, the inner through hole 15 of the plug core sleeve 3 is matched with the core rod 4, and the core rod outer shape 17 is clearance fit with the inner through hole 15.

[0028] The material of the female mold 1 is polyurethane, the material of the plug cone sleeve 2 and the plug core sleeve 3 are both metal, the material of the core rod 4 is metal, and its hardness is higher than that of the plug cone sleeve 2 and the plug core sleeve 3, and the length of the core rod 4 is less than the length of the female mold 1.

[0029] During specific application, the upper end face 12 of the plug cone sleeve is placed inward into the female model cavity 5, so that the female mold bottom surface 7 is flush with the bottom surface 13 of the plug cone sleeve; then the core rod outer shape 17 is matched with the inner through hole 15 of the plug core sleeve 3, and the female model cavity 5 is inserted from the other side, and the outer cone surface 14 of the plug core sleeve 3 is matched with the inner cone surface 10.

[0030] It can process carbide soft blanks with special shapes inside and outside, and complete the processing of the inside and outside shapes with only one clamping.

[0031] When the core rod needs to be replaced, the plug core sleeve 3 can be knocked out from the bottom surface 13 end of the plug cone sleeve.

[0032] If the core rod 4 is not required to participate in the forming, the inner mold of the plug core sleeve 3 is made solid.

[0033] The same plug can support the core rod of the fixed diameter female mold and fixed pressed billet length, which greatly reduces the number and cost of mold opening.

[0034] There is no need to completely remove the plug, which greatly reduces labor intensity and avoids damage to the mold.

[0035] The core sleeve has strong versatility and is not limited to matching with a specific plug.

[0036] There is no need to make a large number of core rods. Only universal core rods are needed to meet the needs of all billets of different lengths, which greatly reduces production costs.

[0037] When the cemented carbide dry bag is formed, the core rod will not bend, ensuring the smooth forming of the compact.

[0038] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0039] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. The split plugging die for pressing hard alloy dry bags is characterized by: The invention comprises a female mold (1), a plug cone sleeve (2), a plug core sleeve (3) and a core rod (4); the female mold (1) has a female mold cavity (5); the plug cone sleeve (2) is matched in the female mold cavity (5); the plug cone sleeve (2) has a through hole (9) and one end thereof has an inner cone surface (10); the plug core sleeve (3) is assembled on the inner cone surface (10); the outer cone surface (14) of the plug core sleeve (3) matches with the inner cone surface (10) of the plug cone sleeve (2); after matching, the upper end surface (16) of the plug core sleeve is flush with the upper end surface (12) of the plug cone sleeve; the inner through hole (15) of the plug core sleeve (3) matches with the core rod (4).

2. The split plugging die for pressing a cemented carbide dry bag according to claim 1, characterized in that: The female mold cavity (5) is circular or square.

3. The split plugging die for pressing a cemented carbide dry bag according to claim 1, characterized in that: The plug cone sleeve outer shape (8) and the female mold cavity (5) are interference fit or clearance fit.

4. The split plugging die for pressing a cemented carbide dry bag according to claim 1, characterized in that: The inner cone surface (10) of the plug cone sleeve (2) has a straight section (11).

5. The split plugging die for pressing a cemented carbide dry bag according to claim 1, characterized in that: The inner through hole (15) of the plug core sleeve (3) and the outer shape (17) of the core rod are clearance-matched.

6. The split plugging die for pressing a cemented carbide dry bag according to claim 1, characterized in that: The length of the core rod (4) is shorter than the length of the female mold (1).

7. The split plugging die for pressing a cemented carbide dry bag according to claim 1 or 6, characterized in that: The female mold (1) is made of polyurethane, the plug cone sleeve (2) and the plug core sleeve (3) are both made of metal, and the core rod (4) is also made of metal, and its hardness is higher than that of the plug cone sleeve (2) and the plug core sleeve (3).

Images