CN204747486U - Preparation mould of tungsten cobalt carbide spare - Google Patents

Abstract

The utility model discloses a tungsten cobalt carbide spare's preparation mould, it includes mounting plate, the shaping cylinder, lower fixed terrace die, the auxiliary positioning ring, go up movable terrace die, the lower tip of lower fixed terrace die inlays and inserts in the terrace die mounting hole of mounting plate, the lower end of fixed terrace die inlays and inserts to the shaping through-hole lower tip of shaping cylinder, the lower tip of going up movable terrace die inlays and inserts to shaping through-hole upper end, the auxiliary positioning ring is set up in shaping cylinder upper surface, the inner wall of lower fixed terrace die upper surface, the lower surface of upper movable terrace die and shaping through-hole encloses jointly and becomes the shaping cavity; through the structure design, this preparation mould of tungsten cobalt carbide spare has modern design, simple structure, the efficient advantage of suppression, promptly the utility model discloses can accomplish tungsten cobalt carbide spare press forming operation effectively.

Description

A preparation mold for tungsten-cobalt cemented carbide parts

technical field

The utility model relates to the technical field of hard alloy parts processing, in particular to a mold for preparing tungsten-cobalt hard alloy parts.

Background technique

Cemented carbide is a kind of cermet tool material prepared by powder metallurgy with refractory metal compounds (WC, TaC, TiC, NbC, etc.) as the matrix and transition metals (Co, Fe and Ni) as the binder phase. ; Due to the extremely high melting point of carbides, it is difficult to produce them by methods such as melting and casting. As a tool and structural material, cemented carbide has a series of excellent performance characteristics, specifically: 1. It has high hardness and wear resistance, and has good red hardness, which exceeds the normal temperature hardness of high-speed steel at 600 °C. , which exceeds the normal temperature hardness of carbon steel at 1000°C; 2. It has a high elastic modulus and good rigidity at room temperature; 3. It has good chemical stability. Some grades of cemented carbide can resist acid and alkali corrosion, even No obvious oxidation at high temperature; 4. High compressive strength, up to 6000MPa; 5. Electrical conductivity and thermal conductivity are equivalent to iron and iron alloys; 6. Low thermal expansion coefficient.

With its high hardness, high bending strength and high cost performance, cemented carbide has been used in metal cutting, rock drilling, rock drilling, stone cutting, metal forming molds and structural parts, wear-resistant parts and grinding for many years. It has been widely used in hard particles and corrosion-resistant materials.

As an important type of cemented carbide, tungsten-cobalt cemented carbide is also widely used; among them, for the production process of tungsten-cobalt cemented carbide products, it generally includes powder preparation, mixture preparation, pressing , sintering and post-processing steps. Press forming in the manufacturing process of tungsten-cobalt cemented carbide products is a process of processing the mixture into a compact with a certain density, strength, shape and size. The relative uniformity of the density of each part of the tungsten-cobalt cemented carbide compact , There is no delamination and crack phenomenon, which is the technical key to ensure the geometric shape and dimensional accuracy of the sintered blank and reduce waste products.

Utility model content

The purpose of the utility model is to provide a preparation mold of tungsten-cobalt hard alloy parts, which has novel design, high pressing efficiency and simple structure.

In order to achieve the above object, the utility model is realized through the following technical solutions.

A preparation mold for tungsten-cobalt cemented carbide parts, including a horizontally arranged installation bottom plate, a cylindrical shaped cylinder with a central axis extending vertically is installed on the upper end side of the installed bottom plate, and the formed cylinder The lower end surface of the lower end is built on the upper surface of the installation base plate, and the core of the forming cylinder is provided with a forming through hole extending along the central axis of the forming cylinder and completely penetrating up and down;

A vertically arranged lower fixed punch is installed between the lower end of the forming cylinder and the installation base plate, and an upwardly opening punch installation hole is provided in the middle of the upper surface of the installation base plate, and the lower end of the lower fixed punch is embedded Inserted into the punch mounting hole of the mounting base plate, the upper end of the lower fixing punch extends to the upper end side of the mounting base plate and is inserted into the lower end of the forming through hole of the forming cylinder;

The upper end side of the forming cylinder is equipped with an auxiliary positioning ring in the shape of a ring and an upper movable punch arranged vertically, the auxiliary positioning ring is arranged horizontally and horizontally and the lower end surface of the auxiliary positioning ring is set on the forming cylinder The upper surface of the upper movable punch is embedded in the center hole of the auxiliary positioning ring and the lower end of the upper movable punch is embedded in the upper end of the forming through hole of the forming cylinder, the lower surface of the upper movable punch and the lower fixed The upper surface of the punch and the inner wall of the forming through hole together form a molding chamber; when the molding chamber is filled with tungsten-cobalt cemented carbide powder, the upper end of the upper movable punch extends to the upper end of the auxiliary positioning ring ; After the tungsten-cobalt cemented carbide powder in the molding chamber is pressed and formed, the upper end surface of the upper movable punch is level with the upper end surface of the auxiliary positioning ring.

Wherein, the outer diameter of the auxiliary positioning ring is equal to the outer diameter of the forming cylinder.

The beneficial effects of the utility model are: a preparation mold of a tungsten-cobalt cemented carbide part described in the utility model, which includes a mounting base plate, a forming cylinder, a lower fixed punch, an auxiliary positioning ring, and an upper movable punch, The lower end of the lower fixed punch is inserted into the punch mounting hole of the installation base plate, the upper end of the lower fixed punch is inserted into the lower end of the forming through hole of the forming cylinder, and the lower end of the upper movable punch is inserted into the upper end of the forming through hole The auxiliary positioning ring is set on the upper surface of the forming cylinder, and the upper surface of the lower fixed punch, the lower surface of the upper movable punch and the inner wall of the forming through hole are jointly enclosed to form a forming cavity; through the above structural design, the tungsten-cobalt hard The preparation mold of tungsten carbide parts has the advantages of novel design, simple structure and high pressing efficiency, that is, it can effectively complete the pressing and forming operation of tungsten-cobalt cemented carbide parts.

Description of drawings

The utility model is further described below using the drawings, but the embodiments in the drawings do not constitute any limitation to the utility model.

Fig. 1 is the structural representation of the preparation mold of the present utility model.

Fig. 2 is an exploded schematic diagram of the preparation mold of the present invention.

Fig. 3 is a structural schematic view of the mold for the present invention during pressing.

Fig. 4 is a schematic structural view of the mold for the present invention after the pressing is completed.

Fig. 5 is a structural schematic diagram of the preparation mold of the present invention when the forming cylinder retreats from the formed tungsten-cobalt cemented carbide part.

Fig. 6 is a schematic diagram of the structure of the preparation mold of the present invention after the forming cylinder retreats from the formed tungsten-cobalt cemented carbide part.

In Figures 1 to 6 include:

1——Installation base plate 11——Punch mounting hole

2——molding cylinder 21——molding through hole

3——Lower fixed punch 4——Auxiliary positioning ring

41——center hole 5——upper movable punch

6 - molding chamber 7 - tungsten cobalt cemented carbide powder

8——tungsten-cobalt cemented carbide parts.

Detailed ways

The utility model will be described below in conjunction with specific embodiments.

As shown in Figures 1 to 6, a preparation mold for tungsten-cobalt cemented carbide parts includes a horizontally arranged installation base plate 1, the upper end side of the installation base plate 1 is equipped with a Vertically extending forming cylinder 2, the lower end surface of forming cylinder 2 is built on the upper surface of installation base plate 1, and the core of forming cylinder 2 is provided with a molding extending along the central axis of forming cylinder 2 and completely penetrating up and down. Through hole 21.

Further, a vertically arranged lower fixing punch 3 is installed between the lower end of the forming cylinder 2 and the installation base plate 1, and an upwardly opening punch mounting hole 11 is provided in the middle of the upper surface of the installation base plate 1. The lower end of the lower fixed punch 3 is inserted into the punch mounting hole 11 of the mounting base 1, and the upper end of the lower fixed punch 3 extends to the upper end of the mounting base 1 and is inserted into the forming through hole of the forming cylinder 2. 21 lower end.

Further, the upper end side of the molding cylinder 2 is equipped with an auxiliary positioning ring 4 in the shape of a ring and an upper movable punch 5 arranged vertically, the auxiliary positioning ring 4 is horizontally arranged and the auxiliary positioning ring The lower end surface of 4 is built on the upper surface of the forming cylinder 2, the upper movable punch 5 is embedded in the center hole 41 of the auxiliary positioning ring 4 and the lower end of the upper movable punch 5 is embedded in the forming cylinder 2. The upper end of the through hole 21, the lower surface of the upper movable punch 5, the upper surface of the lower fixed punch 3 and the inner wall of the forming through hole 21 jointly form a molding chamber 6; when the molding chamber 6 is filled with tungsten cobalt When the cemented carbide powder 7, the upper end of the upper movable punch 5 extends to the upper end side of the auxiliary positioning ring 4; The upper end face of the upper end face is level with the upper end face of the auxiliary positioning ring 4.

The preparation mold of the utility model will be described in detail below in combination with the specific action process, specifically: firstly, the lower fixed punch 3 and the forming cylinder 2 are installed on the installation base plate 1, and the lower end of the lower fixed punch 3 is inserted into the In the punch mounting hole 11 of the installation base plate 1, the forming cylinder 2 is placed on the upper surface of the installation base plate 1 and the upper end of the lower fixed punch 3 is aligned and inserted into the lower end of the forming through hole 21 of the forming cylinder 2; Then the tungsten-cobalt cemented carbide powder 7 is filled into the molding chamber 6 from the upper opening of the forming through hole 21, after the tungsten-cobalt cemented carbide powder 7 is filled, the lower end of the upper movable punch 5 is aligned Align and insert to the upper end of the forming through hole 21, and place the auxiliary positioning ring 4 on the upper surface of the forming cylinder 2; The entire set of molds is moved to the workbench of the punching machine, the lower surface of the installation base plate 1 is placed on the upper surface of the workbench of the punching machine, the upper movable punch 5 is aligned with the punch of the punching machine and the upper movable punch 5 is positioned at the punch of the punching machine. directly below the head; after the mold is placed on the punching machine table in place, start the punching machine and make the punch of the punching machine face down to press the upper movable punch 5, and the upper movable punch 5 moves down and the mold in the forming chamber 6 The tungsten-cobalt cemented carbide powder 7 is compacted and compacted. When the upper end surface of the upper movable punch 5 is level with the upper end surface of the auxiliary positioning ring 4, the punch of the punching machine is controlled to move upward and reset, and the stamping action ends and The tungsten-cobalt cemented carbide part 8 is pressed; after the tungsten-cobalt cemented carbide part 8 is pressed, the auxiliary positioning ring 4 is removed from the upper surface of the forming cylinder 2, and the forming cylinder 2 is lifted and turned upside down , the upper movable punch 5 and the lower fixed punch 3 are reversed and reversed synchronously with the forming cylinder 2. At this time, the upper movable punch 5 is located below the forming cylinder 2, and the lower fixed punch 3 is located above the forming cylinder 2; After the forming cylinder 2 is reversed and in place, insert the upper movable punch 5 into the punch mounting hole 11 of the installation base plate 1, and place the auxiliary positioning ring 4 on the reversed forming cylinder 2 On the surface, start the punching machine again and make the punch of the punching machine face down to press the upper end surface of the auxiliary positioning ring 4, the auxiliary positioning ring 4 moves down, and the forming cylinder 2 faces downward under the driving action of the auxiliary positioning ring 4 Move and gradually withdraw from the pressed and formed tungsten-cobalt cemented carbide parts 8; when the forming cylinder 2 is against the upper surface of the installation base plate 1, control the punch of the punching machine to move up and reset, and the pressed and formed The tungsten-cobalt cemented carbide part 8 is taken out from the mould, and the demoulding action is completed.

It needs to be further explained that in the process of pressing and forming the tungsten-cobalt cemented carbide part 8, the preparation mold of the present utility model ensures the thickness of the tungsten-cobalt cemented carbide part 8 through the auxiliary positioning ring 4, and the tungsten-cobalt cemented carbide part 8 pressed each time is hard. The thickness of quality alloy part 8 is consistent.

It should be further pointed out that the outer diameter value of the auxiliary positioning ring 4 is equal to the outer diameter value of the forming cylinder 2; through the design of the size and structure, in the utility model press-molded tungsten-cobalt cemented carbide part 8 and the demoulding process, use The operator can conveniently control the alignment of the outer peripheral wall of the auxiliary positioning ring 4 with the outer peripheral wall of the forming cylinder 2, thereby ensuring that the die is under a stable force when the punch of the punching machine acts.

Based on the above situation, it can be seen that through the above structural design, the preparation mold of the tungsten-cobalt cemented carbide parts of the present invention has the advantages of novel design, simple structure and high pressing efficiency, that is, the present invention can effectively complete the tungsten-cobalt cemented carbide parts. 8 Compression molding operations.

The above content is only a preferred embodiment of the present utility model. For those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation and scope of application. The content of this specification should not be understood as Limitations on the Invention.

Claims (2)

1. a tungsten-cobalt hard alloy part prepare mould, it is characterized in that: include the mounting base (1) arranged in horizontal cross, the upper end side of mounting base (1) be equiped with in cylindrical shape and central axis along the vertical forming cylinder body (2) extended, the lower surface of forming cylinder body (2) is erected on the upper surface of mounting base (1), and the central axis that the core of forming cylinder body (2) offers along forming cylinder body (2) extends and the forming through hole (21) run through completely up and down;

The lower solid punch (3) in vertically arranging is equiped with between the bottom of forming cylinder body (2) and mounting base (1), the centre position of mounting base (1) upper surface offers the punch installing hole (11) towards upper shed, the bottom of lower solid punch (3) is intercalated in the punch installing hole (11) of mounting base (1), and the upper end of lower solid punch (3) extends to the upper end side of mounting base (1) and is intercalated in forming through hole (21) bottom of forming cylinder body (2);

The upper end side of forming cylinder body (2) is equiped with the auxiliary positioning annulus (4) in toroidal and the upper movable punch (5) in vertical layout, auxiliary positioning annulus (4) is arranged in horizontal cross and the lower surface of auxiliary positioning annulus (4) is erected on the upper surface of forming cylinder body (2), in the centre bore (41) that upper movable punch (5) is flush-mounted in auxiliary positioning annulus (4) and the bottom of upper movable punch (5) is intercalated in forming through hole (21) upper end of forming cylinder body (2), the lower surface of upper movable punch (5), the upper surface of lower solid punch (3) and the inwall of forming through hole (21) enclose jointly dresses up shaping chamber (6), when being filled with tungsten-cobalt hard alloy powder (7) in forming cavity room (6), the upper end of upper movable punch (5) extends to the upper end side of auxiliary positioning annulus (4), after the tungsten-cobalt hard alloy powder (7) in forming cavity room (6) is compressing, the upper surface of upper movable punch (5) is concordant with the upper surface level of auxiliary positioning annulus (4).

2. a kind of tungsten-cobalt hard alloy part according to claim 1 prepare mould, it is characterized in that: the external diameter value of described auxiliary positioning annulus (4) is equal with the external diameter value of described forming cylinder body (2).