CN206253649U - Powder metallurgy vibration shaping mould - Google Patents

Abstract

The utility model discloses a powder metallurgy vibration forming mold, which belongs to the field of powder metallurgy molds and is used for solving the problems of poor fluidity and difficult demoulding of existing molds. It includes a movable mold, a fixed mold located above the movable mold, and a demoulding mechanism. The fixed mold includes a base, a support located above the base, a one-way serial machine motor installed on the support, and a The first fixed die seat, the second fixed die seat located above the first fixed die seat, the fixed die punch located in the second fixed die seat; the demoulding mechanism is located on the inner side of the support; The motors include a first one-way serial motor and a second one-way serial motor. The technical scheme provides a powder metallurgy vibration forming mold, which realizes the flow of powder in the mold through the vibration of a motor, and is easy to demould and easy to operate.

Description

Powder metallurgy vibration forming die

technical field

The utility model belongs to the field of powder metallurgy molds, in particular to a powder metallurgy vibration forming mold.

Background technique

Compression molding puts metal powder into a steel mold cavity, and presses the powder through a die punch to form it.

The powder contained in the mold cavity during the molding process will produce the so-called "arch bridge" phenomenon due to the friction and mechanical engagement between the particles, forming many pores of different sizes. When pressing, the volume of the powder body is compressed, and the process is generally expressed by the relative density of the compact - pressing pressure curve (Figure 1). In the initial stage, the powder particles move relative to each other and redistribute, and the pores are filled, so that the density of the green compact increases sharply and reaches the maximum packing density; at this time, the powder particles have been compacted with each other, so when the pressing pressure increases, the density of the green compact is almost unchanged, the curve appears flat. Then continue to increase the pressing pressure, and the powder particles will undergo elastic or plastic deformation or brittle fracture, which will further densify the green compact. Due to the mechanical meshing between particles and the attractive force between metal atoms on the contact surface, the pressed powder becomes a compact with a certain strength. Regarding the powder compaction theory, since Walker (E.E.Walker) announced his argument in 1923, there have been dozens of theoretical and empirical formulas, among which Aji (L.F.Athy, 1930), Barishin (Μ.Ю.Бальшин, 1938), Kawakita Koo (1963) and other formulas have certain practical significance; however, these theories are still in the exploratory stage. Compression pressure and compact density distribution During the molding process, the compression pressure is mainly consumed in the following two parts: ① Overcoming the friction between powder particles (called internal friction) and the deformation resistance of powder particles; ② Overcoming the impact of powder particles on the mold wall The friction force (called external friction force). Due to the existence of external friction, the density distribution of the green compact formed by compression molding is actually non-uniform. For example, in one-way pressing, the part closer to the punch of the pressure die has a higher density, and the part farther away has a lower density. During bidirectional pressing (actually a combination of two unidirectional pressings), the density at both ends of the green compact along the direction parallel to the pressure is higher, and the central part is lower. Adding lubricant to the powder or coating it on the mold wall can improve the non-uniformity of green compact density.

In the traditional powder metallurgy pressing process, the plastic fluidity of powder metallurgy is poor, and the products produced by simply leveling and pressing during pressing have low yield and low quality, and the existing powder metallurgy mold demoulding is more troublesome.

Contents of the invention

The purpose of the utility model is to provide a powder metallurgy vibration forming die with good fluidity and convenient and simple demoulding.

For realizing above-mentioned technical purpose, the technical scheme that the utility model adopts is as follows:

A powder metallurgy vibration forming mold, including a movable mold, a fixed mold located above the movable mold, and a demoulding mechanism, the fixed mold includes a base, a support located above the base, and a one-way string machine installed on the support Motor, the first fixed die seat positioned above the support, the second fixed die seat positioned above the first fixed die seat, and the fixed punch punch positioned in the second fixed die seat;

The support is located on the edge of the base, the support and the base are connected by bolts, the one-way serial machine motor is located on the left and right sides of the fixed die, the first fixed die base is connected to the support by bolts, the The second fixed die seat is placed on the first fixed die seat, the horizontal displacement is limited by positioning pins between the first fixed die seat and the second fixed die seat, and a mold cavity is opened in the second fixed die seat , the mold cavity and the punch of the fixed punch are matched in shape, and the punch of the fixed punch is placed in the cavity;

The demoulding mechanism is located on the inner side of the support;

The one-way tandem motor includes a first one-way tandem motor and a second one-way tandem motor, the first one-way tandem motor is installed horizontally, and the second one-way tandem motor is at an angle of 45 degrees to the horizontal Install.

With the above-mentioned technical scheme, the one-way series machine motor vibrates the powder loaded into the mold cavity, making the powder more compact. The installation positions of the first one-way series machine motor and the second one-way series machine motor are different, and one is installed horizontally , one is installed at 45 degrees, one realizes vibration in the horizontal direction, and the other realizes vibration in the vertical direction, so as to achieve a better compaction effect, reduce the gap between the powders, and improve the molding quality of the mold.

It is further defined that the demoulding mechanism includes a demoulding vertical block, a demoulding ejector pin bolt arranged laterally, a demoulding lever with one end sleeved on the demoulding ejector pin bolt, a demoulding cushion block located above the demoulding vertical block, The demoulding positioning plate above the demoulding pad, and the demoulding ejector pin above the demoulding positioning plate;

The lower end of the demoulding vertical block can be connected to the base by bolts, or can be welded or integrally formed and fixedly connected to the base. There are 2 demoulding levers, and the demoulding levers are arranged front and back. The demoulding levers include The short rod part, the connecting part and the long rod part, the short rod part, the connecting part and the long rod part are integrally formed or connected by welding, the angle between the short rod part and the long rod part is 100-120 degrees, and the detachment The mold positioning plate and the first fixed die base are paired with through holes, and the two ends of the demoulding ejector rod are placed in the through holes.

The establishment of the demoulding mechanism makes demoulding easier, and the demoulding can be realized by simply pulling the long rod, and there are 2 demoulding levers, which can use symmetrical force, and the force on the fixed punch punch is more uniform, preventing the Sets the offset of the die punch.

It is further defined that the moving die includes a moving die punch, a first moving die body above the moving die punch, a second moving die body above the first moving die body, and the shape of the moving die punch matches the die cavity , the moving die punch is connected to the first moving die body through bolts, and the second moving die body is connected to the first moving die body through bolts.

They are all connected by bolts, which are easy to assemble and disassemble. According to the shape of different parts, the punch of the movable punch, the punch seat of the second fixed die and the punch of the fixed punch can be replaced.

It is further defined that the lower end of the first movable mold body is provided with a limit block, the limit block is hollow, the two ends of the limit block are open, and the inner side of the opening of the upper end of the limit block is provided with a ring-shaped protrusion. The upper end of the limiting block is connected to the first movable model body through the upper opening through the bolt.

The function of the limit block is that it can be replaced according to the thickness of different mold finished parts.

It is further defined that the end of the short rod is in the shape of an arc.

Prevent excessive stress concentration.

Further defined, the included angle between the short rod part and the long rod part is 120 degrees.

as a specific size.

Compared with the prior art, the utility model has good fluidity and convenient demoulding.

Description of drawings

The utility model can be further illustrated by the non-limitative embodiments provided by the accompanying drawings;

Fig. 1 is the top view of the powder metallurgy vibration forming mold of the present invention;

Fig. 2 is the sectional view of A-A direction in Fig. 1;

Fig. 3 is the sectional view of the side of the powder metallurgy vibration forming mold of the utility model;

Fig. 4 is the structural representation of demoulding lever;

The main component symbols are explained as follows:

Moving mold 1, fixed mold 2, demoulding mechanism 3,

Base 21, support 22, one-way serial machine motor 23, first fixed punching die seat 24, second fixed punching die seat 25, fixed punching die punch 26, positioning pin 4, die cavity 5,

The first one-way tandem motor 231, the second one-way tandem motor 232,

The demoulding vertical block 31, the demoulding ejector pin bolt 32, the demoulding lever 33, the demoulding spacer 34, the demoulding positioning plate 35, the demoulding ejector pin 36,

Short rod portion 331, connecting portion 332, long rod portion 333,

The movable die punch 11, the first movable die body 12, the second movable die body 13, the limit block 6, and the annular protrusion 7.

detailed description

In order to enable those skilled in the art to better understand the utility model, the technical solution of the utility model will be further described below in conjunction with the drawings and embodiments.

As shown in Figure 1, Figure 2, Figure 3, and Figure 4, the powder metallurgy vibration forming mold includes a movable mold 1, a fixed mold 2 located above the movable mold 1, and a demoulding mechanism 3. The fixed mold 2 includes a base 21, The support member 22 above the base 21, the one-way serial machine motor 23 installed on the support member 22, the first fixed die holder 24 above the support member 22, the second fixed die holder above the first fixed die holder 24 25. The fixed punch punch 26 located in the second fixed punch seat 25;

The support member 22 is located at the edge of the base 21, the support member 22 and the base 21 are connected by bolts, the one-way serial machine motor 23 is located on the left and right sides of the fixed die 2, the first fixed die base 24 is connected to the support member 22 by bolts, the second The fixed die seat 25 is placed on the first fixed die seat 24, the horizontal displacement is limited by the positioning pin 4 between the first fixed die seat 24 and the second fixed die seat 25, and a mold cavity is opened in the second fixed die seat 25 5. The mold cavity 5 matches the shape of the fixed punch punch 26, and the fixed punch punch 26 is placed in the mold cavity 5;

The demoulding mechanism 3 is located on the inner side of the support member 22;

The one-way tandem motor 23 comprises a first unidirectional tandem motor 231, a second unidirectional tandem motor 232, the first unidirectional tandem motor 231 is installed horizontally, and the second unidirectional tandem motor 232 is installed at 45 degrees to the horizontal .

The one-way serial motor 23 is available in the market, and can be connected to the supporting member by bolts, so no redundant description is given here.

Preferably, the demoulding mechanism 3 includes a demoulding vertical block 31, a demoulding ejector pin bolt 32 arranged laterally, a demoulding lever 33 with one end sleeved on the demoulding ejector pin bolt 32, and a demoulding lever 33 positioned above the demoulding vertical block 31. Pad 34, the demoulding positioning plate 35 above the demoulding pad 34, the demoulding ejector pin 36 above the demoulding positioning plate 35;

The demoulding vertical block 31 is preferably located in the middle of the base 21 .

The lower end of the demoulding vertical block 31 can be connected to the base 21 by bolts, or can be welded or integrally formed and fixedly connected with the base 21. There are 2 demoulding levers 33, which are arranged front and back, and the demoulding levers 33 include short rods. Part 331, connecting part 332, long rod part 333, short rod part 331, connecting part 332, long rod part 333 are integrally formed or welded, and the included angle of short rod part 331 and long rod part 333 is 100-120 degree, take off The mold positioning plate 35 and the first fixed die seat 24 have through holes in pairs, and the two ends of the demoulding ejector pin 36 are placed in the through holes.

The demoulding jack bolt 32 is sleeved inside the connecting portion 332 .

Preferably, the movable die 1 comprises a movable die punch 11, a first movable die body 12 positioned above the movable die punch 11, a second movable die body 13 positioned above the first movable die body 12, and the shape of the movable die punch 11 and The die cavity 5 is matched, the movable die punch 11 is connected to the first movable die body 12 by bolts, and the second movable die body 13 is connected to the first movable die body 12 by bolts.

Preferably, the lower end of the first movable mold body 12 is provided with a limiter 6, the limiter 6 is hollow, the two ends of the limiter 6 are open, the inner side of the upper end opening of the limiter 6 is provided with an annular protrusion 7, and the limiter 6 is hollow. 6. The upper end is connected to the first movable model body 12 through the upper end opening by bolts.

Preferably, the end of the short rod portion 331 is in the shape of an arc.

Optimally, the included angle between the short rod part 331 and the long rod part 333 is 120 degrees, and the situation of 120 degrees is shown in FIG. 3 .

The method of using this mold is to pull the long rod part 333 so that the short rod part 331 does not touch the demoulding pad 34, then fill the mold cavity 5 with powder, turn on the one-way serial machine motor 23 to reduce the gap between the powder, Then the movable die 1 is pressed down to compact the powder into shape.

The powder metallurgy vibration forming mold provided by the utility model has been introduced in detail above. The description of specific embodiments is only used to help understand the method and core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (6)

1. A powder metallurgy vibration forming mold, comprising a movable mold, a fixed mold positioned above the movable mold, characterized in that: it also includes a demoulding mechanism, and the fixed mold includes a base, a support located above the base, and a support mounted on the support The one-way serial machine motor on the top, the first fixed die seat located above the support, the second fixed die seat located above the first fixed die seat, and the fixed die punch located in the second fixed die seat; The support is located on the edge of the base, the support and the base are connected by bolts, the one-way serial machine motor is located on the left and right sides of the fixed die, the first fixed die base is connected to the support by bolts, the The second fixed die seat is placed on the first fixed die seat, the horizontal displacement is limited by positioning pins between the first fixed die seat and the second fixed die seat, and a mold cavity is opened in the second fixed die seat , the mold cavity and the punch of the fixed punch are matched in shape, and the punch of the fixed punch is placed in the cavity; The demoulding mechanism is located on the inner side of the support; The one-way tandem motor includes a first one-way tandem motor and a second one-way tandem motor, the first one-way tandem motor is installed horizontally, and the second one-way tandem motor is at an angle of 45 degrees to the horizontal Install. 2. The powder metallurgy vibration forming mold according to claim 1, characterized in that: the demoulding mechanism comprises a demoulding vertical block, a demoulding ejector bolt arranged laterally, and a demoulding ejector bolt with one end sleeved on the demoulding ejector bolt. The mold lever, the demoulding pad positioned above the demoulding vertical block, the demoulding positioning plate positioned above the demoulding pad, the demoulding ejector pin positioned above the demoulding positioning plate; The lower end of the demoulding vertical block can be connected to the base by bolts, or can be welded or integrally formed and fixedly connected to the base. There are 2 demoulding levers, and the demoulding levers are arranged front and back. The demoulding levers include The short rod part, the connecting part and the long rod part, the short rod part, the connecting part and the long rod part are integrally formed or connected by welding, the angle between the short rod part and the long rod part is 100-120 degrees, and the detachment The mold positioning plate and the first fixed die base are paired with through holes, and the two ends of the demoulding ejector rod are placed in the through holes. 3. The powder metallurgy vibration forming die according to any one of claims 1-2, characterized in that: the movable die comprises a movable die punch, a first movable die body located above the movable die punch, a first movable die body located above the first movable die The second moving die body above the die body, the shape of the moving die punch matches the die cavity, the moving die punch is connected to the first moving die body by bolts, and the second moving die body is connected to the first moving die body by bolts Dynamic phantom. 4. The powder metallurgy vibration forming mold according to claim 3, characterized in that: the lower end of the first movable mold body is provided with a limit block, the limit block is hollow, and the two ends of the limit block are open , the inner side of the opening of the upper end of the limiting block is provided with an annular protrusion, and the upper end of the limiting block is connected to the first movable mold body through the opening of the upper end by bolts. 5. The powder metallurgy vibration forming die according to claim 2, characterized in that: the end of the short rod is in the shape of an arc. 6. The powder metallurgy vibration forming die according to claim 2, characterized in that: the angle between the short rod part and the long rod part is 120 degrees.