CN206425406U - A kind of punch-head assembly and compression molding device - Google Patents

Abstract

The utility model is related to compression molding technology field, and in particular to a kind of punch-head assembly and compression molding device, the punch-head assembly include：First drift, with the first acting surface towards preformed product embryo material；At least one core bar, is arranged in first drift and stretches out first acting surface, and the core bar is suitable to bounce back when by punching press active force.Punch-head assembly and compression molding device that the utility model is provided, are conducive to improving the compression molding quality of product with holes, are prevented effectively from core bar and damaged products.

Description

A kind of punch-head assembly and compression molding device

Technical field

The utility model is related to compression molding technology field, and in particular to a kind of punch-head assembly and compression molding device.

Background technology

In train disk braking system, brake pad is one of critical component, and brake force is applied to by brake clamp On brake pad, make the brake pad and brake disc of brake pad, absorb kinetic energy, train braking is stopped.In brake pad Batch production process in, friction piece product compacting be used as important procedure, it is ensured that friction piece steady quality is most important.Friction piece Product compacting is to improve friction volume density, lift the committed step of properties of product.Optimize mould structure, realize that friction piece product is steady It is fixed to suppress imperative in batches.

For the compression molding of friction piece product with holes, the upper punch of compression molding device of the prior art has and production The core bar that the hole site of product institute band is engaged and set beyond drift pressure surface, during compression molding, upper punch and core bar Towards former motion, the preformed product embryo material in the forming cavity of former is suppressed, after the size and formed product of core bar Hole size and height quite, core bar is stretched into the hole of preformed product embryo material during compacting, for prevent hole excessive shrinkage, Ensure the density of material near the relative position and hole wall in hole, still, the relatively described drift of core bar described in prior art is consolidated Fixed to set, in actual production process, because the preforming embryo material dimensional accuracy of product is not high, embryo material is likely to occur blocked up or mistake Thin situation, when embryo material is blocked up, the axial height in the hole for the product that the drift suppressed under preset pressure is molded More than core bar axial length, cause core bar can not still stretch into bottom hole when being come downwards to upper punch at maximum displacement, thus core bar without Method device to hole bottom point progress is spacing, and then situations such as bottom hole of shaped article is deformed, flash is excessive occurs, influences product matter Amount；Equally, when embryo material is excessively thin, bottom hole is exceeded when core bar is come downwards at maximum displacement with upper punch, particularly with product Blind hole, such case easily causes blind hole makes its bottom surface crushing or even be punched through under the punching press of core bar, while also to core bar Head causes damage.

Utility model content

Therefore, the technical problems to be solved in the utility model be to overcome in the prior art product with holes in compression molding When, the shaping locating effect of drift core bar device to hole is poor, shaped article quality conformance is poor, and easily causes core bar and damaged products Defect, so as to provide a kind of compression molding quality for being conducive to improving product with holes, be prevented effectively from core bar and damaged products Punch-head assembly.

Further provide for a kind of compression molding device with above-mentioned punch-head assembly.

The technical solution adopted in the utility model is as follows：

A kind of punch-head assembly, including：First drift, with the first acting surface towards preformed product embryo material；At least one Individual core bar, is arranged in first drift and stretches out first acting surface, the core bar is suitable to by punching press active force When bounce back.

The sliding cavity being slidably matched with the core bar, the core bar and institute are formed along pressing direction in first drift State the resilient bias for being provided between sliding cavity and making the core bar stretch out the first acting surface direction.

The core bar stretches out the first acting surface part and is provided with radial groove.

It is additionally provided between the core bar and the sliding cavity for preventing the core bar from deviating from the limit of first acting surface Bit architecture.

The position limiting structure includes taking shape in the boss of the radial dimension increase on the core bar, and is slided located at described The limited step that intracavitary coordinates with the boss face, the boss is extend out at maximum displacement and the limiting stand in the core bar The limiting stand terrace of rank offsets.

The sliding cavity includes the first sub- cavity for being suitable to accommodate the resilient bias, and with the described first sub- cavity Connection is set and suitable for the second sub- cavity of the receiving core bar.

The resilient bias is the elastic pressuring spring being coaxially disposed with the core bar, and axial one end of the elastic pressuring spring is supported On the inwall of the sliding cavity, the axial other end is against the one end of the core bar in first drift.

A kind of compression molding device, including：Former, with through forming cavity, for limiting preformed product embryo material Outline；Above-mentioned punch-head assembly；And second drift, second be oppositely arranged with the first acting surface with first drift Acting surface；First drift is arranged on the axial two ends of the forming cavity with second drift and makees relative ramming motion simultaneously Coordinate with the forming cavity to preformed product embryo material punch forming.

Second drift is adapted to extend into the forming cavity, and first acting surface is pressure surface, second effect Face is pressure-bearing surface.

Also include the first travel mechanism, with the first guidance set set along pressing direction, can be led along described first The first mounting bracket moved back and forth to component, and the first drive mechanism that driving first mounting bracket is moved back and forth, it is described First drift is installed on first mounting bracket.

Also include the second travel mechanism, can be along institute with along the second axially arranged guidance set of second drift State the second mounting bracket that the second guidance set is moved back and forth, and the second driving machine that driving second mounting bracket is moved back and forth Structure, the former is installed on second mounting bracket.

The locating slot stretched into suitable for the location division of preformed product embryo material is formed on the pressure-bearing surface of second drift.

Technical solutions of the utility model, have the following advantages that：

1. the punch-head assembly that the utility model is provided, including with the first acting surface towards preformed product embryo material, with And at least one core bar of first acting surface is arranged in first drift and stretches out, the core bar is suitable to rushed Bounced back during pressure active force, the setting that bounces back of core bar, reducing will to the dimensional accuracy of preformed product embryo material in compression molding Ask, for the through hole on preformed product embryo material, the stretching maximum length of scalable core bar is not less than through hole axial length； For the blind hole on preformed product embryo material, the preset pressure of compression molding forming machine is certain, and when embryo material is blocked up, blind hole hole depth increases Plus, the scalable setting of core bar avoids bar length when core bar is fixedly installed and is less than hole depth, causes core bar can not device to hole bottom point progress It is spacing, so occur shaped article bottom hole deformation or flash it is excessive situations such as；When embryo material is excessively thin, blind hole hole depth reduces, core When bar touches hole bottom, acted on and bounced back by stamping press, it is to avoid core bar length is more than hole depth when core bar is fixedly installed, caused pair The crushing in bottom hole face is even punched through, while it also avoid the damage caused to core bar head, adds the service life of core bar.

2. form the sliding cavity set along pressing direction, institute in the punch-head assembly that the utility model is provided, the first drift Stating core bar can be slidably matched with the sliding cavity, and being provided between core bar and sliding cavity makes core bar stretch out the first acting surface The resilient bias in direction, the setting of the resilient bias enables core bar along pressing direction elastic telescopic, when core bar is rushed When pressing active force effect, resilient bias compression, core bar steadily bounces back into sliding cavity, when punching press active force is eliminated, core bar Acted on and resetted by the elastic-restoring force of resilient bias, it is steady to stretch out the first acting surface.

3. the punch-head assembly that the utility model is provided, the part that core bar stretches out the first acting surface is provided with radial groove, by During compression molding, the powder chip of embryo material enters in the first drift unavoidably, increase core bar abrasion, influences the normal of drift Use, therefore radial groove, during the reciprocal telescopic of core bar, its step surface forms annular scraper, to the contained structure of core bar Powder between core bar is back and forth scraped, and the powder between the contained structure and core bar of core bar is easier to flow to footpath In the receiving space formed to groove, as core bar stretches out the first acting surface, powder chip is taken out of first drift, be conducive to punching The normal of head is used.

4. the punch-head assembly that the utility model is provided, is additionally provided between core bar and sliding cavity for preventing core bar from deviating from first The position limiting structure of acting surface, when core bar is conducted oneself with dignity or pressure from other weight members by the biasing force of resilient bias, core bar Effect, during with the trend for going out the first acting surface, position limiting structure can prevent core bar from deviating from, it is ensured that drift is worked continuously.

5. the utility model provide compression molding device, including with through forming cavity former, can limit pre- The outline of shaped article embryo material, in addition to the punch-head assembly and the second drift, the second drift have and the first drift The second acting surface that first acting surface is oppositely arranged, two drifts are arranged on the axial two ends of forming cavity and make relative ramming motion, Under the profile limitation of forming cavity, the relative ramming motion of two drifts is suppressed preformed product embryo material, obtains densification Shaped article.

6. the compression molding device that the utility model is provided, the second drift is stretched into forming cavity, its second acting surface is to hold Pressure surface, the first acting surface of the first drift is pressure surface, and the second drift is fixedly installed, and the first drift is along pressing direction towards close Or the direction away from the second drift is moved, complete to the compressing of preformed product embryo material.

7. the compression molding device that the utility model is provided, former is installed on the second mounting bracket, the second mounting bracket can Moved along the second drift axial reciprocating, the demoulding after being easy to product compressing.

8. formed on the compression molding device that the utility model is provided, the pressure-bearing surface of the second drift suitable for preformed product The locating slot that the location division of embryo material is stretched into, it is to avoid embryo material is shifted over during compressing by stamping press effect, causes hole Position occur deviation, or even deformation of products.

Brief description of the drawings

, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, describe below In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the sectional view of the punch-head assembly provided in embodiment one of the present utility model；

Fig. 2 is the front view of the core bar shown in Fig. 1；

Fig. 3 is the sectional view of the compression molding device provided in embodiment two of the present utility model；

Fig. 4 is the sectional view that the second drift shown in Fig. 3 coordinates with former.

Description of reference numerals：

The drifts of 1- first；The acting surfaces of 11- first；12- core bars；13- radial grooves；14- sliding cavities；15- resilient bias； 16- boss；17- limiting stand terraces；2- formers；21- forming cavities；The drifts of 3- second；The acting surfaces of 31- second；32- locating slots；4- First travel mechanism；The guidance sets of 41- first；The mounting brackets of 42- first；The drive mechanisms of 43- first；The travel mechanisms of 5- second；51- Second guidance set；The mounting brackets of 52- second；The drive mechanisms of 53- second.

Embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, sheet The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality Novel protected scope.

, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outer " are, based on orientation shown in the drawings or position relationship, to be only Described for the ease of description the utility model and simplifying, rather than to indicate or imply that signified device or element must have specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.

, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Concrete meaning of the language in the utility model.

As long as in addition, technical characteristic involved in the utility model different embodiments disclosed below is each other Not constituting conflict can just be combined with each other.

Embodiment one

Fig. 1 is the sectional view of the punch-head assembly provided in embodiment one of the present utility model；Fig. 2 is the core bar shown in Fig. 1 Front view.As illustrated in fig. 1 and 2, the punch-head assembly that the present embodiment is provided, including drift installing plate and the first drift 1, first Drift 1, which has in the first acting surface 11 towards preformed product embryo material, the first drift 1, forms the cunning set along pressing direction Dynamic chamber 14, the sliding cavity 14 includes interconnected the first sub- cavity and the second sub- cavity, wherein being provided with bullet in the first sub- cavity Property bias piece 15, provided with a core bar 12 in the second sub- cavity, the opening shaping of the second sub- cavity is on the first acting surface 11, bullet Property bias piece 15 cavity wall of the first sub- cavity is against along one end in its telescopic direction, the other end is against core bar 12 positioned at the first punching One end in first 1, core bar 12 can reciprocatingly slide along the second sub- cavity, and core bar 12 is in the fexible bias pressure of resilient bias 15 Under power effect, with the trend for stretching out the first acting surface 11.

The setting that bounces back of core bar 12, reduces the dimension precision requirement to preformed product embryo material in compression molding, right Through hole on preformed product embryo material, the stretching maximum length of scalable core bar 12 is not less than through hole axial length；Pin To the blind hole on preformed product embryo material, the preset pressure of compression molding forming machine is certain, when embryo material is blocked up, the increase of blind hole hole depth, The scalable setting of core bar 12 avoids when core bar 12 is fixedly installed bar length and is less than hole depth, cause core bar 12 can not device to hole bottom point enter Row it is spacing, and then occur shaped article bottom hole deformation or flash it is excessive situations such as；When embryo material is excessively thin, blind hole hole depth reduces, When core bar 12 touches hole bottom, acted on and bounced back by stamping press, it is to avoid the length of core bar 12 is more than hole when core bar 12 is fixedly installed It is deep, cause the crushing of device to hole bottom surface or even punch through, while it also avoid the damage caused to the head of core bar 12, add core bar 12 Service life.

Specifically, the first drift 1 that the present embodiment is provided, is additionally provided between core bar 12 and sliding cavity 14 for preventing core bar The position limiting structure of 12 the first acting surfaces 11 of abjection, the position limiting structure includes taking shape in the radial dimension increase on the core bar 12 Boss 16, and the limited step formed by the diameter difference of the first sub- cavity and the second sub- cavity, the boss 16 is described Core bar 12 is extend out at maximum displacement to offset with the limiting stand terrace 17.

Specifically, as shown in Fig. 2 the part that core bar 12 stretches out the first acting surface 11 is provided with radial groove 13, due to mould During molded, the powder chip of embryo material enters in sliding cavity 14 unavoidably, and increase core bar 12 weares and teares, and the normal of influence drift makes With, therefore radial groove 13, during the reciprocal telescopic of core bar 12, its step surface forms annular scraper, in sliding cavity 14 Powder is back and forth scraped, and the powder in sliding cavity 14 is easier to flow in the receiving space of the formation of radial groove 13, As core bar 12 stretches out the first acting surface 11, powder chip is taken out of first drift 1, be conducive to the normal of drift to use.

Further, as the alternative embodiment of above-described embodiment one, the surface forming of the first drift has along punching press side To the groove of setting, core bar is placed in the groove, and can be reciprocatingly slided along the groove, elastic provided with accommodating in groove First sub- groove of bias piece, and accommodate the second sub- groove of core bar.

Further, as the alternative embodiment of above-described embodiment one, the first drift is not provided with resilient bias, core bar It can be stretched out by deadweight in the first acting surface, the hole for stretching into preformed product embryo material, it is big in the punching press active force effect being subject to When it is conducted oneself with dignity, core bar bounces back into the first drift.

Further, as the alternative embodiment of above-described embodiment one, the first drift is not provided with position limiting structure, when first Drift is arranged on the lower section of preformed product embryo material, and core bar is acted on by punching press active force, and elasticity of compression bias piece is descending, works as punching press Active force is removed, and the elastic-restoring force of resilient bias promotes core bar to reset upwards, until at core bar to maximum displacement, core bar is remote One end from product embryo material is still located in the first drift.

Further, as the alternative embodiment of above-described embodiment one, the resilient bias is made up of elastomeric material Elastomer block.

Further, as the alternative embodiment of above-described embodiment one, the core bar number of the first drift can also be two It is individual, three or multiple, the setting number of core bar is consistent with the number in the hole on preformed product embryo material.

Embodiment two

Fig. 3 is the sectional view of the compression molding device provided in embodiment two of the present utility model；Fig. 4 is shown in Fig. 3 The sectional view of second drift 3.As shown in Figures 3 and 4, the present embodiment provide a kind of compression molding device, including with through The former 2 of forming cavity 21, can limit the outline of preformed product embryo material, in addition to the punch-head assembly and the second drift 3, the second drift 3 has the second acting surface 31 that the first acting surface 11 with the first drift 1 is oppositely arranged, and two drifts are arranged on into The axial two ends of die cavity 21 and the relative ramming motion of work, under the profile limitation of forming cavity 21, the relative ramming motion of two drifts Preformed product embryo material is suppressed, the shaped article of densification is obtained.

Specifically, in addition to the first travel mechanism 4, the first drift 1 is oppositely arranged with the second drift about 3, the second drift 3 Be fixedly installed on by drift installing plate on the support frame of press, the first drift 1 using the first travel mechanism 4 towards close to or it is remote Direction from the second drift 3 is moved back and forth, and first travel mechanism 4 includes being installed on support frame as described above, and along punching press The first guidance set 41 that direction is set, and the first mounting bracket 42 that can be moved back and forth along first guidance set 41, First drift 1 is installed on the first mounting bracket 42 by drift installing plate, and the first acting surface 11 is pressure surface, the second acting surface 31 For pressure-bearing surface；Former 2 is monoblock type former 2, is arranged between the first drift 1 and the second drift 3, and the second drift 3 is suitable to Stretch into the forming cavity 21 of former 2, former 2 realizes the relative shifting with the shaped article on pressure-bearing surface by the second travel mechanism 5 It is dynamic, the demoulding is completed, second travel mechanism 5 is included along the second axially arranged guidance set 51, Neng Gouyan of the second drift 3 The second mounting bracket 52 that second guidance set 51 is moved back and forth, and the second driving machine that the second mounting bracket 52 of driving is moved back and forth Structure 53, former 2 is installed on the second mounting bracket 52, and the drive mechanism 53 of the first drive mechanism 43 and second is hydraulic driving machine Structure.

In addition, forming the locating slot stretched into suitable for the location division of preformed product embryo material on the pressure-bearing surface of the second drift 3 32, it is to avoid embryo material is shifted over during compressing by stamping press effect, cause the position in hole to occur deviation, or even product Deformation.

The compression molding device provided in the present embodiment, its course of work is as follows：Start the second drive mechanism 53, driving the Two mounting brackets 52 are moved along the second guidance set 51 towards the first drift 1, drive the former 2 that is located on the second mounting bracket 52 along the Two drifts 3 are moved at maximum displacement, and now the pressure-bearing surface of the second drift 3 is located in the forming cavity 21 of former 2, by preforming production Product embryo material is positioned on the pressure-bearing surface in forming cavity 21, starts the first drive mechanism 43, and the first mounting bracket 42 of driving is led along first Moved to component 41 towards the second drift 3, drive the first drift 1 being located on the first mounting bracket 42 towards preformed product embryo material Pressure, core bar 12 is stretched into the hole of product embryo material, as stamping press increases, and the first drift 1 continues to move towards the second drift 3, Resilient bias 15 in the sliding cavity 14 of first drift 1 is compressed, and core bar 12 bounces back into sliding cavity 14, in pressing process, cloudy Mould 2 is influenceed by the active force of product dispensing, and the direction for being directed away from the first drift 1 along the second guidance set 51 is moved, side compacting Side is stripped；After the completion of compacting, start the first travel mechanism 4 and drive the first drift 1 to be directed away from the motion of the direction of the second drift 3, will Shaped article takes out, and next preformed product embryo material is changed, into next compressing process.

Further, as the alternative embodiment of above-described embodiment two, the second drift is relative up and down with the first drift to be set Put, the second acting surface is pressure surface, the first acting surface is pressure-bearing surface, and the pressure-bearing surface of the first drift is adapted to extend into the forming cavity of former Interior, the first drift is fixedly installed, and the second drift is driven towards the direction motion closer or far from the first drift by travel mechanism.

Further, as the alternative embodiment of above-described embodiment two, the first drift is horizontally opposed with the second drift Set, the first drift being capable of move toward one another or opposite motion with the second drift.

Further, as the alternative embodiment of above-described embodiment two, former is split type former, and forming cavity is by two Sub- former is involuted, and the now demoulding is not required to set the second travel mechanism that can be moved axially along the second drift, it is only necessary to set Any sub- former can be driven to be directed away from the travel mechanism of another sub- former direction motion, you can realize the de- of shaped article Mould.

Further, as the alternative embodiment of above-described embodiment two, first drive mechanism and the second driving machine Structure is electric driving mechanism, or is magnetic driving mechanism.

Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or Among the protection domain that variation is created still in the utility model.

Claims (12)

1. a kind of punch-head assembly, it is characterised in that including：

First drift (1), with the first acting surface (11) towards preformed product embryo material；

At least one core bar (12), is arranged in first drift (1) and stretches out first acting surface (11), the core bar (12) it is suitable to bounce back when by punching press active force.

2. punch-head assembly according to claim 1, it is characterised in that be molded in first drift (1) along pressing direction There is the sliding cavity (14) being slidably matched with the core bar (12), being provided between the core bar (12) and the sliding cavity (14) makes The core bar (12) stretches out the resilient bias (15) in the first acting surface (11) direction.

3. punch-head assembly according to claim 2, it is characterised in that the core bar (12) stretches out first acting surface (11) partly it is provided with radial groove (13).

4. punch-head assembly according to claim 2, it is characterised in that between the core bar (12) and the sliding cavity (14) It is additionally provided with for preventing the core bar (12) from deviating from the position limiting structure of first acting surface (11).

5. punch-head assembly according to claim 4, it is characterised in that the position limiting structure includes taking shape in the core bar (12) boss (16) of the radial dimension increase on, and coordinate in the sliding cavity (14) with the boss (16) face Limited step, the boss (16) extend out to the limiting stand terrace at maximum displacement with the limited step in the core bar (12) (17) offset.

6. the punch-head assembly according to any one of claim 2-5, it is characterised in that the sliding cavity (14) includes being suitable to The first sub- cavity of the resilient bias (15) is accommodated, and setting is connected and described suitable for accommodating with the described first sub- cavity Second sub- cavity of core bar (12).

7. the punch-head assembly according to any one of claim 2-5, it is characterised in that the resilient bias (15) be with The elastic pressuring spring that the core bar (12) is coaxially disposed, axial one end of the elastic pressuring spring is against the inwall of the sliding cavity (14) On, the axial other end is against the one end of the core bar (12) in first drift (1).

8. a kind of compression molding device, it is characterised in that including：

Former (2), with through forming cavity (21), the outline for limiting preformed product embryo material；

Punch-head assembly any one of claim 1-7；And

Second drift (3), the second acting surface being oppositely arranged with the first acting surface (11) with first drift (1) (31)；

First drift (1) is arranged on the axial two ends of the forming cavity (21) with second drift (3) and makees relative punching Pressure motion simultaneously coordinates to preformed product embryo material punch forming with the forming cavity (21).

9. compression molding device according to claim 8, it is characterised in that second drift (3) is adapted to extend into described In forming cavity (21), first acting surface (11) is pressure surface, and second acting surface (31) is pressure-bearing surface.

10. compression molding device according to claim 8, it is characterised in that also including the first travel mechanism (4), have The first guidance set (41) set along pressing direction, can be moved back and forth along first guidance set (41) first is installed Frame (42), and the first drive mechanism (43) that driving first mounting bracket (42) moves back and forth, the first drift (1) peace Loaded on first mounting bracket (42).

11. the compression molding device according to claim 9 or 10, it is characterised in that also including the second travel mechanism (5), , can be past along second guidance set (51) with along axially arranged the second guidance set (51) of second drift (3) The second mounting bracket (52) moved again, and the second drive mechanism (53) that driving second mounting bracket (52) moves back and forth, The former (2) is installed on second mounting bracket (52).

12. the compression molding device according to any one of claim 9-10, it is characterised in that second drift (3) Pressure-bearing surface on form the locating slot (32) stretched into suitable for the location division of preformed product embryo material.