CN216828547U - Floating press forming tool for complex special-shaped salt core - Google Patents

Abstract

The utility model relates to a salt core production and processing technical field discloses a unsteady pressure moulding frock for complicated special-shaped salt core very much. The salt core pressing die comprises a pressing die set, an outer die frame set, an inner die frame set, an ejector pin and a thin oil cylinder, wherein the pressing die set is used for being matched with a floating core, a lower die set and the like for pressing and forming, the ejector pin is used for ejecting a salt core pressing finished product under the matching of the inner die frame set, and the ejector pin, the lower die set, the floating core and the ejector pin form a pressing cavity. The utility model discloses the salt core density of producing is sufficient, compact structure, intensity are high, has improved the qualification rate and the quality of product, and the cost is lower.

Description

Floating press forming tool for complex special-shaped salt core

Technical Field

The utility model relates to a salt core production and processing technology field, in particular to a unsteady pressure equipment of moulding dress for complicated special-shaped salt core.

Background

The production process of the salt core comprises a pressing procedure, wherein loose and low-density raw materials are extruded into a compact and high-density salt core blank, and the process is similar to the powder metallurgy technology. The most complex special-shaped salt core has a structure with small bosses (as shown in fig. 1), and the cross-sectional shapes of the salt core at any position of the whole circumference are different (as shown in fig. 2, the cross-sectional shapes A-F are different).

The complex special-shaped salt core has the following two problems in the processing technology:

1. the simple compression molding process has the defects of insufficient density, loose structure and low strength at the small boss molding part; this drawback not only results in a high product reject rate, but also presents a certain quality risk during use by the customer.

2. The non-uniformity of the section shapes leads to the fact that the forming cutter with lower cost cannot be used for processing, and the engraving and milling process has the problem of high cost.

Disclosure of Invention

The utility model discloses a remedy prior art's defect, provide a unsteady suppression molding tool that is used for complicated special-shaped salt core of density height, closely knit, the high workable of intensity.

The utility model discloses a realize through following technical scheme:

a floating press forming tool for a complex special-shaped salt core is characterized by comprising a pressing die set, an outer die frame set, an inner die frame set, a thimble and a thin oil cylinder, wherein the pressing die set comprises an upper die set, a middle die set, a lower die set, a floating core and an ejection core, the upper die set and the middle die set are fixed together, the outer die frame set comprises an outer bottom template and an upper template which are connected through an outer stand column, and a through hole is formed in the middle of the outer bottom template; the inner formwork assembly comprises: the inner bottom template is carried on the outer bottom template, the inner bottom template is fixedly connected with a thimble positioning plate through an inner upright post, the inner bottom template is provided with a thin oil cylinder, the output end of the thin oil cylinder is fixedly connected with a thimble bearing plate, and the thimble bearing plate is provided with two thimbles; the lower module is fixed on the upper template; the floating core, the ejection core and the lower module are all of hollow structures, the ejection core and the floating core are positioned in the lower module, and the upper surface of the floating core is flush with the upper surface of the lower module; a spring seat is also arranged in the ejection core, a spring is arranged on the spring seat, and the upper end of the spring is connected with the floating core; the lower part of the floating core is positioned in the ejection core, and the outer diameter of the floating core is equal to the inner diameter of the ejection core; the outer diameter of the floating core is smaller than the inner diameter of the lower die set; an ejection core fixing plate is fixed on the ejector pin positioning plate and fixedly connected with an ejection core through a connecting rod penetrating through the upper template; the ejector pin upwards passes through the ejector pin positioning plate, the upper template and the ejector core in sequence.

The outer bottom template is provided with an outer guide column, and the inner bottom template is sleeved on the outer guide column.

And an inner guide post is arranged on the inner bottom template, and the thimble bearing plate is sleeved on the inner guide post.

The lower die set comprises a first die plate and a second die plate, a cylinder is arranged between the first die plate and the second die plate, the first die plate, the cylinder and the second die plate are fixed together, and the second die plate is fixed on the upper die plate.

The floating core is connected with a guide rod, and the guide rod penetrates through the upper template downwards.

The utility model has the advantages that:

the utility model discloses the salt core density of producing is sufficient, compact structure, intensity are high, has improved the qualification rate and the quality of product, and the cost is lower.

Drawings

The invention will be further described with reference to the accompanying drawings:

FIG. 1 is a schematic structural view of a salt core;

FIG. 2 is a schematic cross-sectional view of the salt core at different positions;

FIG. 3 is a schematic cross-sectional view of the filling step of the present invention;

FIG. 4 is an enlarged view of a portion a of FIG. 3;

FIG. 5 is a schematic sectional view of the first stage of the pressing step of the present invention;

FIG. 6 is an enlarged view of the structure at b in FIG. 5;

FIG. 7 is a schematic cross-sectional view of the second stage of the pressing step of the present invention;

FIG. 8 is an enlarged view of the structure at c in FIG. 7;

FIG. 9 is a schematic sectional view of the first stage of the demolding process of the present invention;

FIG. 10 is an enlarged view of the structure at d in FIG. 9;

FIG. 11 is a schematic sectional view of the second stage of the demolding process of the present invention;

FIG. 12 is an enlarged view of the structure at e in FIG. 11;

FIG. 13 is a schematic sectional view of the returning step of the present invention;

FIG. 14 is an enlarged view of the structure at f in FIG. 13; .

In the figure, 1 an outer bottom template, 2 an upper template, 3 thimbles, 4 thin oil cylinders, 5 outer stand columns, 6 outer guide columns, 7 inner bottom templates, 8 inner stand columns, 9 thimble positioning plates, 11 thimble supporting plates, 12 upper modules, 13 middle modules, 131 crisscross parts, 14 second templates, 15 cylinders, 16 first templates, 17 ejection cores, 18 flanges, 19 ejection core fixing plates, 20 spring seats, 21 springs, 22 floating cores, 23 guide rods, 24 small bosses, 25 bulk materials, 26 material adding, 27 pressing cavities and 28 salt cores are pressed to form finished products.

Detailed Description

The attached drawings are specific embodiments of the invention. As shown in fig. 3 to 14, the floating press molding tool for the complex special-shaped salt core comprises a pressing mold set, an outer mold set, an inner mold set, an ejection core 17, a floating core 22, an ejector pin 3 and a thin oil cylinder 4, wherein:

the outer formwork group comprises an outer sole formwork 1 and an upper formwork 2, the outer sole formwork 1 is fixedly connected with the upper formwork 2 through an outer upright post 5, and through holes are formed in the centers of the outer sole formwork 1 and the upper formwork 2; an outer guide post 6 is mounted on the outer bottom form 1.

The internal mold frame set comprises: an inner bottom template 7 carried on the outer bottom template 1, wherein the inner bottom template 7 is sleeved on the outer guide post 6 and can slide up and down on the outer guide post 6, the inner bottom template 7 is connected with a thimble positioning plate 9 through an inner upright post 8, an inner guide post (not shown in the figure) is arranged on the inner bottom template 7, a thimble bearing plate 11 is arranged between the inner bottom template 7 and the thimble positioning plate 9, the thimble bearing plate 11 is sleeved on the inner guide post and can move up and down on the inner guide post, a thin oil cylinder 4 is also arranged on the inner bottom template 7, the output end of the thin oil cylinder 4 faces upwards, and the output end is fixedly connected with the thimble bearing plate 11.

The pressing die set comprises an upper die set 12, a middle die set 13 and a lower die set, wherein the upper die set 12 and the middle die set 13 are fixed together and are arranged on a pressing structure of a four-column press when in use; lower module is installed on cope match-plate pattern 2, and its concrete structure is: a second template 14 fixed on the upper template 2, a cylinder 15 is arranged on the second template 14, a first template 16 is arranged on the cylinder 15, the first template 16 is in a convex structure, then the first template 16, the cylinder 15 and the second template 14 are fixed together by bolts, and a through hole between the first template 16 and the second template 14 is smaller than the inner diameter of the cylinder 15.

The ejection core 17 is positioned in the lower die set and on the upper die plate 2, the ejection core is cylindrical as a whole, a flange 18 extends out of the lower end of the ejection core, the outer diameter of the ejection core 17 is the same as that of the through hole of the first die plate 16, the upper end of the ejection core extends into the through hole of the first die plate 16, the lower end of the ejection core 17 is fixedly connected with a connecting rod (not shown in the figure), the connecting rod passes through the upper die plate 2 and then is fixedly connected with an ejection core fixing plate 19, the ejection core fixing plate 19 is fixed on the ejector pin positioning plate 9, and the connecting rod is movably connected with the upper die plate 2, namely, the connecting rod can move up and down; a spring seat 20 is arranged in the ejection core 17, a plurality of springs 21 are arranged in the spring seat 20, the upper ends of the springs 21 are fixed on a floating core 22, the lower part of the floating core 22 is positioned in the ejection core 17 and is contacted with the ejection core 17, and under the normal condition, the upper surface of the floating core 22 is flush with the upper surface of the first module; the floating core 22 is fixedly connected with a guide rod 23 through a bolt, and the guide rod 23 penetrates through the upper template 2 downwards and can move up and down.

The ejector core 17 is provided with two through holes for the ejector pin 3 to pass through, after the ejector pin 3 passes through, the top end of the ejector pin is lower than the upper end surface of the ejector core 17, and the reserved space is the area formed by the small bosses 24, so the four walls of the space are not regular planes, but surfaces matched with the outer surfaces of the small bosses.

The upper die set 12 is configured as shown in fig. 3, and has a T-shape, and the diameter of the lower end surface thereof is the same as that of the upper end surface of the first die plate 16.

The middle module 13 is a cross-shaped star as shown in fig. 5 and 6, and the diameter of the lower end surface of the middle module is the same as that of the upper end surface of the floating core 22.

And a small boss 24, the cross-shaped cross part of the middle module, the inner wall of the first template 16, the outer wall of the floating core 22, the ejector pin 3 and the upper end of the ejector core 17 jointly form a pressing cavity 27.

The criss-cross of the middle die set, the inner wall of the first die plate 16, the outer wall of the floating core 22 and the upper end of the ejector core 17 form a pressing cavity 27 together where the small bosses 24 are not provided.

The cross section of the pressing cavity is the same as that of the salt core, namely, the inner wall of the first template 16, the outer wall of the floating core 22 and the surface of the ejection core 17, which is matched with the outside of the salt core, are formed.

The working process is as follows (the upper die set 12 is fixed on the lower pressing mechanism of the four-column press, and the inner bottom die plate 7 is fixed on the upper jacking mechanism of the four-column press):

first-step filling:

as shown in fig. 3 to 4, the inner frame assembly is in the lower position, the upper surface of the floating core 22 is flush with the upper surface of the first mold plate 16, the piston of the thin cylinder 4 is in the lower position, and the filling is performed in a scraping manner by a drop-in method, so that the bulk material 25 and the material 26 at the small boss 24 fill the whole pressing cavity 27.

And a second step of pressing:

this step is divided into two stages, as shown in FIGS. 5 to 8

The first stage is as follows: the upper die set 12 and the middle die set 13 are pressed down until the lower end face of the middle die set 13 is in contact with the upper surface of the floating core 22 set, and the rest parts are kept still.

And a second stage: the upper die set 12 and the middle die set 13 continue to be pressed downwards and drive the floating core 22 to move downwards together, and the spring 21 is compressed; meanwhile, the piston of the thin oil cylinder 4 moves upwards to drive the thimble bearing plate 11 and the thimble 3 to move upwards, the two actions of the ascending of the thimble 3 and the descending of the floating core 22 are carried out synchronously, when the upper die set 12 and the middle die set 13 move to the die assembly position, namely the lower surface of the upper die set 12 is contacted with the first template 16, the thimble 3 moves to the forming size (namely the thimble bearing plate 11 moves to the position of the thimble positioning plate 9), and then the pressure maintaining is carried out for 0.5-1 second, so that the salt core pressing finished product 28 is ensured to be stressed uniformly.

Thirdly, demolding:

this step is divided into two stages, as shown in FIGS. 9 to 12

The first stage is as follows: after the pressure maintaining is finished, the upper die set 12 and the middle die set 13 move upwards, and meanwhile, the floating core 22 moves upwards together with the upper die set 12 and the middle die set 13 under the action of the elastic force of the spring 21 until the upper surface of the floating core 22 is flush with the upper surface of the first template 16, and the upper die set 12 and the middle die set 13 continue to move upwards to the initial position.

And a second stage: and starting an upper jacking mechanism of the four-column press to drive the inner bottom template 7 to ascend, so that the whole inner framework group ascends to drive the ejection core fixing plate 19, the ejection core 17 and the salt core pressed finished product 28 to move upwards together until the salt core pressed finished product 28 is ejected to a desired position, wherein in the whole mold ejection process, the piston of the thin oil cylinder 4, the thimble supporting plate 11, the thimble positioning plate 9 and the thimble 3 are kept in the positions of the second step, and the thin oil cylinder 4 is in a pressure maintaining state.

The fourth step is to withdraw: as shown in fig. 13 and 14

The upper jacking mechanism of the four-column press withdraws, the whole inner die frame set descends to drive the ejector pin 3 to descend, meanwhile, the piston of the thin oil cylinder 4 retracts, the ejector pin bearing plate 11, the ejector pin positioning plate 9 and the ejector pin 3 also descend to the initial position, and the ejector core 17 also descends to the initial position.

The process is repeated in this way, and continuous production is realized.

Other technical features than those described in the specification are known to those skilled in the art.

Claims (5)

1. A floating press forming tool for a complex special-shaped salt core is characterized by comprising a pressing die set, an outer die frame set, an inner die frame set, a thimble and a thin oil cylinder, wherein the pressing die set comprises an upper die set, a middle die set, a lower die set, a floating core and an ejection core, the upper die set and the middle die set are fixed together, the outer die frame set comprises an outer bottom template and an upper template which are connected through an outer stand column, and a through hole is formed in the middle of the outer bottom template; the inner formwork assembly comprises: the inner bottom template is carried on the outer bottom template, the inner bottom template is fixedly connected with a thimble positioning plate through an inner upright post, the inner bottom template is provided with a thin oil cylinder, the output end of the thin oil cylinder is fixedly connected with a thimble bearing plate, and the thimble bearing plate is provided with two thimbles; the lower module is fixed on the upper template; the floating core, the ejecting core and the lower module are all of hollow structures, the ejecting core and the floating core are positioned in the lower module, and the upper surface of the floating core is flush with the upper surface of the lower module; a spring seat is also arranged in the ejection core, a spring is arranged on the spring seat, and the upper end of the spring is connected with the floating core; the lower part of the floating core is positioned in the ejection core, and the outer diameter of the floating core is equal to the inner diameter of the ejection core; the outer diameter of the floating core is smaller than the inner diameter of the lower die set; an ejection core fixing plate is fixed on the ejector pin positioning plate and fixedly connected with an ejection core through a connecting rod penetrating through the upper template; the ejector pin upwards sequentially penetrates through the ejector pin positioning plate, the upper template and the ejector core; the upper end of the ejector pin is lower than the upper end of the ejector core.

2. The floating press-forming tool for the salt core with the complex profile according to claim 1, wherein the outer bottom template is provided with an outer guide column, and the inner bottom template is sleeved on the outer guide column.

3. The floating press-forming tooling for the salt core with the complex profile according to claim 1, wherein the inner bottom template is provided with an inner guide post, and the thimble bearing plate is sleeved on the inner guide post.

4. The floating press forming tool for the complex profiled salt core as claimed in claim 1, wherein the lower die set comprises a first die plate and a second die plate, a cylinder is arranged between the first die plate and the second die plate, the first die plate, the cylinder and the second die plate are fixed together, and the second die plate is fixed on the upper die plate.

5. The floating press-forming tool for the complex profiled salt core as claimed in claim 1, wherein the floating core is connected with a guide rod, and the guide rod passes through the upper die plate downwards.

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