CN1218801C - Die holder for forming multilayer templets in powder compacting - Google Patents

Abstract

The present invention provides a die holder for forming multilayer templets in powder compacting, which comprises a punch, a punch connecting socket, a templet, a templet drive rod, a female die, a guide post, etc., wherein the punch is connected with the punch connecting socket; the punch connecting socket and the female die are connected to the templet; both the number of lower punches and the number of lower punch connecting sockets are two or more than two; the two or more than two lower punches and lower punch connecting sockets are respectively and orderly connected in a matching mode; each lower punch connecting socket is respectively connected with each independent lower templet in a matching mode. Utilizing the present invention can compact powder parts of multiple table-board and complex shape according to the requirement of practical production, which has a wide range of application; parts manufactured by the present invention have high processing precision and even density, and cracks can not be generated, which can better ensure the processing quality of complex parts; the present invention has high automation degree; utilizing the present invention can obviously save production facilities and investment cost and can enhance the production efficiency. The die holder for forming multilayer templets in powder compacting can be better suitable for the processing field of powder parts.

Description

Multi-layer template powder compression molding mold base

                      

The invention relates to a mold base for a powder compacting machine, in particular to a multi-layer template powder compacting mold base.

Background technique

Powder metallurgy is the technology of manufacturing metal powder and using metal powder (including mixed non-metal powder) as raw material to manufacture materials and products by forming-sintering method. The uniaxial rigid mold compression forming method is currently widely used in the powder metallurgy industry. The traditional powder metallurgy mold base can only produce one kind of parts, and different parts need to be designed with different mold bases, which often increases the cost and shortens the production cycle. Long; the existing powder metallurgy mold base is composed of mold, mold support and adapter, which are used to transfer powder, control the pressing speed of movable die punch and keep the female die, die punch and mandrel at appropriate relative positions. The position device, when compacting parts with complex shapes and multi-tables, in order to prevent the uneven density of the green compact, it is necessary to use the powder transfer technology to rearrange the powder after filling, and the sequence of the movable die punching action and The pressing speed is controlled; the existing multi-layer formwork uses adjusting screws, stoppers or wedge blocks to control the movement of the die punch to achieve the purpose of pressing out multi-table parts, as disclosed in the Chinese utility model patent No. 01239490.4 A "powder molding machine mold frame stopper adjustment mechanism", this adjustment mechanism is to use the stopper to adjust the position of the mold, but this kind of control structure cannot effectively control the position and movement speed of different die punches separately , during the pressing process, due to the uncoordinated punching movement and the elastic deformation of the adjusting screw, stop block and wedge block, the density of the compact is uneven and cracks appear, so it is difficult to ensure the forming quality of complex parts; in order to achieve higher pressing accuracy High multi-table parts, in the Chinese utility model patent No. 01239491.2, a "double upper punch mechanism for powder molding machine mold frame" is disclosed. The structure of the seat can press the parts of two table tops. If you need to press parts with different heights on the table, you need to adjust the fixing nut under the outer punch seat to move the outer punch seat down. The action mode of shifting has poor accuracy, high work intensity and low degree of automation, and because the outer punching seat cannot actually fix its position well when it is adjusted and moved down, it is inevitable that the applied force lags behind when pressing parts. , This will also easily lead to uneven density of the green compact.

Contents of Invention

The object of the present invention is to overcome the shortcoming of prior art, provide a kind of reasonable structure, simple and convenient control multi-layer formwork powder compacting mold base, can carry out independent movement (displacement and speed) and pressure control to each layer die punch, Improve the quality of the compact, and at the same time be able to press and form complex-shaped, multi-table parts, realize the processing and manufacturing of series parts, and improve production efficiency.

The purpose of the present invention is achieved through the following technical solutions: the multi-layer formwork powder compacting mold frame includes an upper die punch, a lower die punch, a die punch connection seat, an upper template, a lower template, a template driving rod, a female mold, and a female mold seat . The guide column is characterized in that: it also includes an integrated oil cylinder, and the integrated oil cylinder drives 3 lower templates through the template driving rod, and the template driving rod passes through the backing plate to connect with the lower template, and the 3 lower templates drive 3 lower molds punching, and each lower die punch is connected to the lower die punching connecting seat through the lower die stamping ring, each lower die punching connecting seat is respectively connected to each independent lower die plate through bolts, and 2 upper die plates drive 2 upper die punches, and The upper die punch is fixed on the upper die punch base through the upper die stamping ring, and the upper die punch base is connected with the upper template through bolts through the spacer.

The integrated oil cylinder is composed of 12 oil cylinders, and 4 oil cylinders are evenly distributed under each layer of lower formwork to ensure that the force of the lower formwork is evenly balanced.

The multi-layer formwork powder pressing forming formwork is connected with the closed-loop control system; specifically, the closed-loop control system is connected with the oil cylinder controlling the formwork, and the speed, displacement and pressure of the die punching are monitored by controlling the formwork.

The working principle of the multi-layer formwork powder pressing molding mold base is: according to the requirements of the multi-table complex shape parts to be processed, the processing requirements of the multi-table complex shape parts are realized by adjusting the relative positions of each die punch, and different parts are produced. It is only necessary to replace the female mold and die punch instead of the entire mold base; the integrated oil cylinder set in this mold base can apply force evenly to the template, so that the powder parts can be uniformly pressed, making the pressed parts uniform in density and improving Its pressing quality; in addition, the closed-loop control system set by this mold base can realize a series of complex operations such as pressurization-relieving-pressure-holding-unloading during the pressing process according to the different processing requirements of different parts, and carry out separate operations on each layer of die punching. The precise movement (displacement and speed) and pressure control can improve the movement precision and pressing quality, so as to achieve better processing effect.

Compared with the prior art, the present invention has the following advantages and effects: (1) the multi-layer formwork powder compacting mold base can be used to press powder parts with multiple tables and complex shapes according to actual production needs, and has a wide range of applications; (2) the present invention The integrated oil cylinder set on the multi-layer formwork powder pressing forming mold base can make the parts bear uniform force during the pressing process, and the set closed-loop control system can control and realize different pressing processes according to the requirements of different processing techniques, so the multi-layer formwork powder The parts manufactured by the press-forming mold base have high processing precision, uniform density, and no cracks, which can better ensure the processing quality of complex parts; The operation adjustment can be completed automatically by the control system, and does not need manual adjustment as in the prior art, so its degree of automation is high and the production efficiency is high; The production of different series of parts only needs to replace the female mold and die punch of the mold base, and does not need to replace the entire mold base. Therefore, compared with the existing equipment that needs to replace different mold bases for the production of different parts, the present invention can significantly save Production equipment investment costs, and can greatly improve production efficiency.

Description of drawings

Fig. 1 is a schematic structural view of the multi-layer template powder compression molding mold base of the present invention.

Fig. 2 is a diagram of the process steps for processing the complex parts with two upper, lower and three table tops by the multi-layer formwork powder press forming mold base shown in Fig. 1 .

Detailed ways

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example

Fig. 1 has shown a kind of structural form of the present invention, as can be seen from Fig. 1, this multi-layer formwork powder press molding formwork comprises the following parts: guide column 1, connecting plate 2, formwork oil cylinder 3, connecting block 4, connecting Rod pressure ring 5, connecting rod 6, lower middle formwork driving rod 7, lower inner formwork 8, lower middle formwork 9, lower outer formwork driving rod 10, lower outer formwork 11, lower outer die punching connection seat 12, female die seat 13 , Upper outer die punching 14, upper template guide sleeve 15, upper template 16, upper inner die punching base 17, upper inner die punching ring 18, upper outer die punching base 19, pad 20, upper inner die punching 21, female die 22. Gaskets 23, 24, lower outer die punch 25, lower outer die punch ring 26, snap ring 27, lower middle die punch 28, lower middle die punch ring 29, lower inner die punch 30, lower inner die punch ring 31 , the lower middle die punch connection seat 32, the lower inner die punch connection seat 33, the core rod 34, the core rod pressure ring 35, the lower inner die punch drive rod 36, the backing plate 37, the core rod connection seat 38, the oil cylinder box 39, the die Frame backing plate 40, lower die punch block 41, upper outer die stamping ring 42, "T" block 43, upper pressure block 44; the specific position and connection relationship of each component is: the upper template 16 passes through the "T" block 43 and upper pressing block 44 are connected on the slide block (not shown in Fig. 1 ) of the powder compacting machine, driven by the slide block; the upper outer die punch 14 is fixed on the upper outer die punch base 19 by the upper outer die stamping ring 42 Above, the upper outer punching base 19 is connected to the upper template 16 by bolts through the pad 20, so the upper outer punching 14 can move with the upper template 16; the upper inner punching 21 passes through the upper inner die stamping ring 18 and the upper inner die The punch base 17 is connected with the upper drive cylinder of the powder compacting machine. The lower inner die punching 30 is connected with the lower inner die punching connecting seat 33 through the lower inner die punching ring 31, and the lower inner die punching connecting seat 33 is connected on the lower inner template 8; the lower middle die punching 28 is connected with the lower middle die punching ring 29 The lower middle die punching connecting seat 32 is connected, and the lower middle die punching connecting seat 32 is installed on the lower middle template 9; the lower outer die punching 25 is connected with the lower outer die punching connecting seat 12 through the lower outer die punching ring 26, and the lower outer die punching Punch connecting seat 12 is installed on the lower outer formwork 11. The female mold 22 is fixedly assembled in the female mold base 13 through the gaskets 23 and 24, and is connected with the lower drive cylinder of the powder compacting machine through the guide post 1 and the connecting plate 2. There are 12 oil cylinders 3 for the formwork, 4 in each group, divided into 3 groups, and each group drives the lower outer formwork 11 through the lower outer formwork drive rod 10, the lower middle formwork drive rod 7, and the lower inner die punch drive rod 36. , lower middle formwork 9, lower inner formwork 8; formwork cylinder 3 is installed in the cavity under backing plate 37, the lower outer formwork drive rod 10 of formwork cylinder 3, lower middle formwork drive rod 7, lower inner die punch The driving rod 36 passes through the backing plate 37 and is connected with the lower outer formwork 11, the lower middle formwork 9, and the lower inner formwork 8 respectively; a lower die punch block 41 is arranged on the backing plate 37 for the positioning of the lower formwork, lowering the The impact of the driving rod on the backing plate 37 and the cylinder box 39 during the pressing process. The core rod 34 is connected to the core rod connecting seat 38 through the core rod clamping ring 35, the core rod connecting seat 38 is connected to one end of the connecting rod 6, and the other end of the connecting rod 6 is connected to the connecting block 4 through the connecting rod clamping ring 5, The connection block 4 is connected to and driven by the central drive cylinder of the lower drive cylinder.

Fig. 2 shows the process principle of using the multi-layer formwork powder compacting formwork of the present invention to process complex parts with two upper and lower three tables, and the specific steps are as follows——

In Fig. 2(a), the upper punch, the lower punch and the female die are in the powder loading position, and the powder is filled into the space formed by the lower punch and the female die.

In Fig. 2(b), in order to prevent the powder from splashing out when the upper die is pressed down, keep the position of the lower die still, and move the female die up a short distance to form a splash-proof space on the powder.

In Fig. 2(c), the upper die is pressed down and reaches the position where it is in contact with the powder.

In Figure 2(d), the upper die punch continues to press down, and the lower die punch also moves down to a certain extent, and the powder is redistributed in the cavity and gradually compacted.

In Figure 2(e), the upper die punches to the lowest position, and the lower die punch also moves down to the lowest position, at this time the powder is pressed to the minimum volume; 1. The specific motion parameters of the lower die punch are determined by the pressing process conditions of different parts.

In Figure 2(f), the pressure of the upper die punch is released to allow the part to rebound to a certain extent; according to the needs of actual process conditions, sometimes the pressure is maintained or partially relieved.

In Figure 2(g), the female die and the upper and lower die punches go up for a certain distance at the same time to prepare for the compaction of the parts.

demoulding. In Fig. 2(h), the die and core rod descend.

In Figure 2(i), the middle mandrel exits the part compact.

In Fig. 2(j), the upper die punch is returned, and the part compact comes out.

To sum up, the multi-layer formwork powder compacting formwork provided by the present invention can well solve the problem of uneven green compact density in the process of pressing complex parts with upper two lower three tables. It is only necessary to replace the female mold and die punch to press similar parts, so the multi-layer formwork powder pressing forming mold base has good versatility, can obviously reduce production cost, and improve production efficiency.

Similarly, the multi-layer formwork powder compacting mold frame formed by connecting other numbers of upper die punches and lower die punches in a manner similar to or identical to the structure of the present invention also belongs to the technical content of the present invention and does not exceed the protection of the present invention. out of range.

Claims (2)

1. A multi-layer formwork powder press forming mold base, comprising an upper die punch, a lower die punch, a die punch connection seat, an upper die plate, a lower die plate, a die plate driving rod, a female die, a female die holder, and a guide post, characterized in that : It also includes an integrated oil cylinder, the integrated oil cylinder drives 3 lower templates through the template driving rod, and the template driving rod passes through the backing plate to connect with the lower template, the 3 lower templates drive 3 lower die punches, and each lower die punch The stamping ring of the lower die is connected with the connecting seat of the lower die punch, and the connecting seats of each lower die punch are respectively connected with each independent lower die plate through bolts, and the two upper die plates drive two upper die punches, and the upper die punches are punched through the upper die The ring is fixed on the punching base of the upper die, and the base of the upper die punching is connected with the upper formwork by bolts through the spacer. 2. The mold base for multi-layer formwork powder pressing and forming according to claim 1, characterized in that: the integrated oil cylinder is composed of 12 oil cylinders, and 4 oil cylinders are evenly distributed under the lower formwork of each layer.