CN200957665Y - Hard-alloy paster forming mould - Google Patents

Abstract

An up punch is arranged on the top of a female mold while a limiter is arranged outside the up punch. A left down punch and a right down punch are arranged at the lower end of the female mold while the upper end surface of the left down punch and the upper end surface of the right down punch form a step-like structure. The up punch, the left down punch, the right down punch and the female mold form a flat mold chamber in the shape of the number 7. a counter pressure cushion is arranged at the lower end of the female mold while the lower end surface of the right down punch contacts the upper end surface of the counter pressure cushion and a through hole is arranged on the counter pressure cushion and at the opposing position against lower end of the left down punch to facilitate the lowering of the left down punch.. The utility model is simple in structure, produces a product with homogeneous density, is easy to form a big curve in the product and solves the problem that the existing hard alloy mold is prone to cause inhomogeneous densities at different parts of the product and breakage at the bending of the product and is hard to mold a product with big curve when molding a product of irregular shape.

Description

Carbide SMD Forming Die

technical field

The utility model relates to a cemented carbide patch forming die, which belongs to the technical field of forming dies.

technical background

A molding die for ceramics and hard alloy products with holes (patent number: CN02134064.1), including inner and outer mold sets, inner mold cavity, partition plate, upper and lower punches and mandrel, and each layer of blank and blank Partitions are separated from the punch, and the upper and lower punches are equipped with mandrel holes; each partition is movably matched with the cavity wall and can slide up and down along the inner wall of the cavity, and the upper and lower punches are movable. On the corresponding upper and lower partitions, the mandrel connects the upper and lower corresponding blanks, partitions and punches in series. The above-mentioned molds can be used to form products with regular shapes, but if they are used to form products with irregular shapes, it is easy to cause the density of the products to be different, and the corners of the products are prone to breakage. At the same time, for products with large curvature The products are difficult to shape.

Contents of the invention

The purpose of the utility model is to provide a cemented carbide patch molding die with simple structure, uniform density of molded products, and easy formation of large arcs of products, which solves the problem of existing hard alloy molding molds when molding irregularly shaped products. , It is easy to cause the density of the product to be different, and the corner of the product is prone to breakage. At the same time, it is difficult to form a product with a large curvature.

The above-mentioned technical purpose of the utility model is mainly solved by the following technical solutions: the upper end of the die is provided with an upper punch, and a limiter is provided outside the upper punch; the lower end of the die is provided with a left lower punch and a right lower punch; A stepped arrangement is formed between the end face and the upper end face of the right lower punch. The upper punch, left lower punch, right lower punch and die form a "7"-shaped sheet cavity. The lower end of the die is provided with a back pressure pad. The lower end surface of the lower punch is in contact with the upper end surface of the back pressure pad, and the back pressure pad is provided with a through hole to facilitate the sliding of the left lower punch corresponding to the lower end of the left lower punch. During production, place the left lower punch and the right lower punch in the die, then place the die on the back pressure pad, the lower end surface of the right lower punch and the lower end face of the die are supported on the upper surface of the back pressure pad, while the left lower punch The lower end of the back pressure pad is aligned with the through hole of the back pressure pad, and the back pressure pad is placed on the press table, remove the stopper to take out the upper punch, inject the predetermined alloy powder into the mold cavity, and then reinstall the upper punch and the limiter The end surface of the press head acts on the upper end surface of the upper punch, while the left lower punch moves down in the through hole of the back pressure pad due to the unsupported lower end surface, and the upper end surface of the upper punch is flat with the upper end surface of the stopper. Stop; then remove the back pressure pad, turn the whole mold upside down so that the upper end surface of the stopper and the upper end surface of the upper punch are against the working table of the press, and the end surface of the pressure head of the press acts on the end surface of the left lower punch, so that the left lower punch The lower end face of the die and the lower end face of the die and the lower end face of the right lower punch can be cut flat to complete the molding of the product. Among them, the alloy powder in the mold cavity is roughly distributed to various positions of the mold cavity after the initial molding of the upper punch, and under the molding action of the left lower punch, the alloy powder in the mold cavity is evenly distributed to each position of the mold cavity to form Because the alloy powder is evenly distributed throughout the corners and curved surfaces required by the product, problems such as corner breakage will not occur after the product is molded and sintered, which greatly improves the pass rate of the product.

Preferably, the limiter is provided with a central through hole, and the upper end of the upper punch is located in the central through hole. Wherein, the diameter of the central through hole of the limiter is larger than the outer diameter of the upper end of the upper punch, and the two are coaxial.

Preferably, the left and right die surfaces of the die are in an arc shape, the left face of the left lower punch is in an arc structure matching the left die face of the die, and the right face of the right lower punch is in an arc shape matching the right die face of the die. Surface matching arc structure. Because the utility model can evenly distribute the alloy powder in the mold cavity, the arc surface of the product can be directly formed by the mold of the utility model.

Preferably, the upper left corner of the right lower punch is in an arc-shaped chamfered structure. The upper left corner of the right lower punch has an arc-shaped chamfer structure, which can form an arc-shaped corner at the corner of the formed product, and the corner of the product is not easy to crack.

Preferably, a wedge-shaped structure is provided at the lower right corner of the upper punch. Among them, the wedge-shaped structure at the lower right corner of the upper punch can form a wedge-shaped surface on the product.

Therefore, the utility model has the characteristics of simple structure, uniform density of shaped products, and easy formation of large arcs of products.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is a structural representation of a product molded by the utility model;

FIG. 3 is a top view of FIG. 2 .

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Embodiment 1: As shown in Figure 1, the upper end of the die 1 is provided with an upper punch 2, and the upper punch 2 is provided with a stopper 3, and the stopper 3 is provided with a central through hole 31, and the upper end of the upper punch 2 is located in the central through hole In 31, a wedge-shaped structure 21 is provided at the lower right corner of upper punch 2. The lower end of the die 1 is provided with a left lower punch 4 and a right lower punch 5, and the upper end surface 41 of the left lower punch 4 and the upper end face 51 of the right lower punch 5 form a stepped setting. The left die surface 11 and the right die face of the die 1 12 is an arc structure, the left side 42 of the left lower punch 4 is an arc structure matching the left die surface 11 of the die 1, and the right face 52 of the right lower punch 5 is an arc structure matching the right die face 12 of the die 1 , the upper left corner of the right lower punch 5 is in an arc-shaped chamfering structure. The upper punch 2, the left lower punch 4, the right lower punch 5 and the die 1 form a "7"-shaped sheet cavity 8, the lower end of the die 1 is provided with a back pressure pad 6, and the lower end surface of the right lower punch 5 and the back pressure pad 6 is in contact with the upper end face, and the back pressure pad 6 is provided with a through hole 61 corresponding to the lower end of the left lower punch 4 to facilitate the sliding of the left lower punch.

During production, the left lower punch 4 and the right lower punch 5 are placed in the die 1, and then the die 1 is placed on the back pressure pad 6, and the lower end surface of the right lower punch 5 and the lower end face of the die 1 are supported on the back pressure pad. The upper surface of the pad 6, and the lower end of the left lower punch 4 is aligned with the through hole 61 of the back pressure pad 6, the back pressure pad 6 is placed on the press table, the stopper 3 is removed to take out the upper punch 2, and the predetermined alloy The powder is injected into the mold cavity 8, and then the upper punch 2 and the stopper 3 are reinstalled. The end surface of the press head acts on the upper end surface of the upper punch, while the pressure of the left lower punch acts on the through hole of the back pressure pad due to the lack of support on the lower end surface. Move inside and down, the upper end surface of the upper punch and the upper end surface of the stopper are flat and stop; then remove the back pressure pad, turn the whole mold upside down so that the upper end surface of the stopper and the upper end surface of the upper punch are against the working table of the press , the end face of the pressure head of the press acts on the end face of the left lower punch, so that the lower end face of the left lower punch is cut flat with the lower end face of the die and the lower end face of the right lower punch to complete the molding of the product. The formed product 9 is shown in the figure 2 and Figure 3. Among them, the alloy powder in the mold cavity is roughly distributed to various positions of the mold cavity after the initial molding of the upper punch, and under the molding action of the left lower punch, the alloy powder in the mold cavity is evenly distributed to each position of the mold cavity to form The corners 10 and large arc surfaces 13, 14, 15, 16 required by the product, because the alloy powder is evenly distributed everywhere, so the problem of corner fracture will not occur after the product is molded and sintered, which greatly improves the qualification of the product Rate.

Claims (5)

1, a kind of carbide alloy paster shaping mould, the die upper end is provided with upper punch, the upper punch peripheral hardware has stop, it is characterized in that described die lower end is provided with the lower-left towards dashing with the bottom right, form step-like setting between the upper surface that upper surface that the lower-left dashes and bottom right dash, described upper punch, lower-left dash, the bottom right dashes and die forms " 7 " font sheet die cavity, the die lower end is provided with counter-pressure cushion, the lower surface that the bottom right dashes contacts with the upper surface of counter-pressure cushion, and counter-pressure cushion is provided with towards lower end corresponding to the lower-left to be convenient to the lower-left and to sweep away sliding through hole.

2, carbide alloy paster shaping mould according to claim 1 is characterized in that described stop is provided with central through hole, and the upper end of described upper punch is positioned at central through hole.

3, carbide alloy paster shaping mould according to claim 1 and 2, the curved structure of left and right sides die face that it is characterized in that described die, the left side that described lower-left dashes is the arcuate structure that the left die face with die matches, and the right side that described bottom right dashes is the arcuate structure that the right die face with die matches.

4, carbide alloy paster shaping mould according to claim 1 and 2 is characterized in that the curved chamfering structure in the upper left corner that described bottom right dashes.

5, carbide alloy paster shaping mould according to claim 1 and 2 is characterized in that the lower right corner of described upper punch is provided with wedge structure.

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