CN204799897U - Wall tile precision casting mould floats in combustion chamber - Google Patents

Abstract

The utility model relates to a wall tile precision casting mould floats in combustion chamber, including base and the front mould of installing in proper order on the base, back mould, thimble board and limiting plate, and front mould, back mould, thimble board and limiting plate can the compound die and the cooperation form the cavity that is used for part one shot forming, install the wedge locking mechanism who is used for locking behind the compound die on front mould, back mould, thimble board and the limiting plate, be provided with first through -hole on the wall of back mould, when the front mould is in the compound die state with the back mould, leave the clearance between thimble board and the back mould, when the front mould was in the die sinking state with the back mould, the thimble board met with the back mould, and fixed mounting has a plurality of thimble on the thimble board, and the thimble all penetrates first through -hole. The utility model discloses can effectively fix a position processing air film hole and stream the post, part circular conical surface one shot forming has been realized to mount table on the forming part and bolt post well, makes the smooth demolding of part simultaneously, has deformation, non -damaging, need not follow -up hot pressing, has improved the production efficiency and the qualification rate of part effectively.

Description

Combustion chamber floating wall tile precision casting mold

[technical field]

The utility model belongs to precision casting mold field, particularly relates to combustion chamber floating wall tile precision casting mold.

[background technology]

Combustion chamber is one of large parts of aero-engine three, between compressor and turbine, being used for the converts chemical energy in fuel oil is heat energy, pressure-air after compressor pressure is heated to allowable temperature before turbine, to enter exhaust apparatus acting, the important indicator of turbine inlet temperature measured engine performance just.The short annular combustion chamber of current world advanced person, have employed new floating ancient piece of jade, round, flat and with a hole in its centre structure, reducing stress, using the materials with high melting point General Promotion performance of combustion chamber when using short ring type structure.

The mainly model casting of existing tile casting technique, first will cast the wax part of part, then on wax part, be stained with sand and make sand mo(u)ld with waxed work, melt with hot water or steam the wax removed in sand mo(u)ld, finally carries out parts of Casting with remaining arenaceous shell.Consider that wax part depanning moment is very easily out of shape expansion, accessory size demand cannot be ensured, reinforcement must be increased at certain position of part, part not modification during guarantee depanning.And casting technique also to weld cast rising head before wax part shell usually, this makes wax part create secondary deformation again.

Simultaneously because floating wall tile thickness only has 1-1.2mm and be covered with thousands of above and stream the gentle nib of post, an area be 150 × 60 square millimeters have on the surface 500 diameters be 1.2mm-1.5mm stream post and 400 diameters are the air film hole of 1.3mm, simultaneously these stream post and air film hole is distributed on taper seat, so the angular distribution of streaming existence 4 ° ~ 13 ° between post on it, therefore precision casting mould manufacture is very difficult.Existing casting technique is that tile is made plane, sees accompanying drawing 1, to be cast shaping after, then make taper seat by hot straightening mold thermal flexure mold pressing, this casting technique is concerning relatively simple Making mold.But cast floating wall tile out has internal stress to produce after hot pressing is bending, and very easily occur crackle, engine has potential safety hazard to exist, part low qualified.And tile one-shot forming forms taper seat, mainly there is following difficulties, also do not have corresponding mould to address these problems at present:

1) a little hole forming difficult problem for rising head junction will be considered during Design of Dies, when parts of Casting is shaping cut away rising head after how aperture is got through, ensure the final size of part;

2) thousands of apertures and stream post on taper seat location processing a difficult problem;

3) the loose core difficult problem of 5 bolt columns on normal for part, bolt column, along normal direction distribution, cannot extract along the die sinking direction of mould;

4) stream post in a mold because of the difficult problem that tired gas cannot be full of, up to a hundred stream post is blind hole on mould, and having air to there is nibs during pressure injection cannot be full of, and dimensional accuracy is difficult to ensure;

5) so thin-walled parts in a mold go out modulus problem, how to allow the smooth depanning of wax part, without distortion, without damaging, Mould operation is smooth and easy, is problem demanding prompt solution.

[utility model content]

The purpose of this utility model is to overcome problems of the prior art, provides one can one-time formed combustion chamber floating wall tile precision casting mold.

In order to achieve the above object, the utility model adopts following technical scheme:

The front mould comprising base and install successively on base, rear mold, ejector retainner plate and limiting plate, and front mould, rear mold, ejector retainner plate and limiting plate can also coordinate formation to be used for the shaping cavity of part by one-step by matched moulds, front mould, rear mold, ejector retainner plate and limiting plate are provided with the wedge lock mechanism for locking after matched moulds; The wall of rear mold is provided with the first through hole; When front mould and rear mold are in matched moulds state, leave gap between ejector retainner plate and rear mold, when front mould and rear mold are in die opening state, ejector retainner plate connects with rear mold; And ejector retainner plate is installed with several thimbles, thimble all penetrates the first through hole, and wherein the end of a part of thimble is positioned at the first through hole, formed for part on stream post shaping stream column type chamber, the end of residue thimble penetrates that cavity is interior to connect with front mould; Rear mold, ejector retainner plate with limiting plate offers the second through hole and third through-hole that are connected, and the overlap being movably installed with erecting bed on part in the second through hole shaping is loosed core, the tubular being movably installed with bolt column on part in third through-hole shaping is loosed core.

Further, loose core on front mould is provided with, formed and be used for the shaping rising head die cavity of the rising head that is connected with part, penetrate thimble end in cavity with on loose core and to connect with front mould.

Further, rear mold and limiting plate are fixedly mounted on base, and front mould and ejector retainner plate can slide, and front mould and ejector retainner plate are provided with synchronous stripper apparatus.

Further, synchronous stripper apparatus comprises and can rotarily drive ejector retainner plate and move and the lever spanner resetted towards rear mold, and lever spanner is arranged on limiting plate, ejector retainner plate is provided with the servo-actuated push rod connected with front mould.

Further, base is horizontally disposed with and it is provided with the guide rail slided for front mould, and front mould and rear mold are vertical setting, forms Horizontal mould-opening structure.

Further, the lower retaining mechanism that wedge lock mechanism comprises retaining mechanism and arranges in rear mold, in the outside of front mould, compound module is installed, the outside of compound module and limiting plate is inclined-plane, form the wedge shape that upper end size is less than lower end size, upper retaining mechanism is closely fastened on to coordinate in this wedge shape and with lower retaining mechanism and connects.

Further, be matched in clearance between the first through hole in thimble and rear mold.

Further, limiting plate is provided with loosing core the spring of die sinking and location ripple pearl for tubular of cooperation.

Compared with prior art, the utility model has following useful technique effect:

The utility model by arranging the first through hole on front mould, and in the first through hole, penetrate the thimble of cooperation, by the first through hole and end, the thimble cooperation in the first through hole is formed and streams column type chamber, meets depth of cavity requirement, achieves the shaping with densely covered small column class part, connected by remaining thimble end and front mould simultaneously, for the formation of air film hole, air film hole can be processed and streams post by effective location, and the setting that the second through hole and overlap are loosed core, the erecting bed on forming part can be performed well in, the setting that third through-hole and tubular are loosed core, the bolt column on forming part can be performed well in, make the utility model quick in the application, convenient, simultaneously after forming parts, overlap is loosed core and tubular is loosed core is movable installation, can directly extract out, effectively avoid the interference between thimble, also just avoid and conical surface part stream the interference between post, damage can not be caused by opposing connection fluidization tower, after front mould and rear mold die sinking, connected with rear mold by ejector retainner plate again, now drive thimble is ejected part by ejector retainner plate, the first through hole wherein serves good guide effect, ensure that the ejecting force for part is even simultaneously, prevent because undue force cause streaming the fracture of post, the utility model achieves the one-shot forming of part taper seat, making the smooth depanning of part simultaneously, without distortion, without damaging, without the need to follow-up hot pressing, effectively improve production efficiency and the qualification rate of part.

Further, the utility model is loosed core by arranging, and directly by rising head and component integration integrally, namely serves and strengthens anti-deformation effect, and the secondary deformation produced when turn avoid welding rising head, also improves production efficiency simultaneously.

Further, the utility model, by arranging synchronous stripper apparatus, effectively ensures the stability in part ejection process.

Further, the utility model is by arranging lever spanner, ejecting and resetting of ejector retainner plate can be completed like a cork by lever principle design depression bar, simultaneously by arranging servo-actuated push rod, when ejector retainner plate drives thimble to eject, can effectively promote part to move together with front mould, part be taken out, and avoids overturning.

Further, the utility model, by adopting Horizontal mould-opening structure, simplifies mould structure, all directions is loosed core and is convenient to locking and extracts.

Further, the utility model wedge lock mechanism is easy for installation, locking fast and stable.

Further, between the first through hole in the utility model thimble and rear mold, adopt matched in clearance, ensure the exhaust in part forming process, effectively ensure the dimensional accuracy of part.

[accompanying drawing explanation]

Fig. 1 be existing tile part by planar development, the structural representation of thermal flexure after cast;

Fig. 2 is the structural representation of the utility model ejection system and automatic drawing mechanism;

Fig. 3 is the structural representation that the utility model removes upper retaining mechanism.

Fig. 4 is structural representation of the present utility model;

Fig. 5 is top view of the present utility model;

Fig. 6 is the Facad structure schematic diagram of the utility model ejector retainner plate and thimble;

Fig. 7 is the structure schematic diagram of the utility model ejector retainner plate and thimble;

Fig. 8 is the circular cone one-shot forming of tile part in the utility model and the structural representation of Strip casting rising head;

Wherein, 1-base, 2-front mould, 3-rear mold; 4-ejector retainner plate, 5-thimble, 6-lever spanner, the servo-actuated push rod of 7-, 8-part, 9-rising head, 10-streams post, and 11-bolt column, 12-is loosed core; 13 pads, retaining mechanism under 14-, 15-limiting plate; 16-guide rail; 17-overlap is loosed core, the upper retaining mechanism of 18-.

[detailed description of the invention]

Below in conjunction with accompanying drawing, the utility model is described in further details.

See Fig. 2 to Fig. 7, the base 1 that the utility model comprises level and compound module, front mould 2, rear mold 3, ejector retainner plate 4 and the limiting plate 15 vertically installed successively from front to back on base 1.See Fig. 8, the part 8 formed by the utility model and rising head 9 are integral type structure, it also comprise several and stream post 10, several air film holes, five bolt columns and four erecting beds.

See Fig. 2 to Fig. 5, base 1 is arranged guide rail 16, front mould 2 can on the guide rail 16 of base 1 slide anteroposterior, ejector retainner plate 4 also can slide anteroposterior, and rear mold 3 and limiting plate 15 are fixed, and form Horizontal mould-opening structure; Front mould 2 is provided with and looses core 12, on loose core and 12 to coordinate with rear mold 3 and connect, form part 8 and the integrated cavity of rising head 9, and wherein on loose core on 12 and comprise several projections, and snap in the groove of front mould 2, formed and be used for the shaping rising head die cavity of rising head 9, above loose core and 12 to match with rear mold 3, ejector retainner plate 4 and limiting plate 15 and form the one-time formed die cavity of part 8.

The molding structure of part 8: the wall of rear mold 3 is provided with the first through hole; When front mould 2 and rear mold 3 are in matched moulds state, leave gap between ejector retainner plate 4 and rear mold 3, when front mould 2 and rear mold 3 are in die opening state, ejector retainner plate 4 connects with rear mold 3.

See Fig. 6 to Fig. 7, ejector retainner plate 4 is installed with several thimbles 5, thimble 5 all penetrates the first through hole, and wherein the end of a part of thimble 5 is positioned at the first through hole, formed be used on part 8 stream post 10 shaping stream column type chamber, residue thimble 5 end with on loose core 12 and front mould 2 connect, for the some air film holes on forming part 8; Rear mold 3, ejector retainner plate 4 with limiting plate 15 offers the second through hole and third through-hole that are connected, and the overlap being provided with activity in the second through hole looses core 17, shaping for the erecting bed on part 8, wherein overlapping loosing core 17 is that the cylindricality core being used for erecting bed endoporus on forming part 8 is connected formation with the insert being used for shaping erecting bed outer shroud, the overlap cylindricality core of loosing core on 17 and insert end all will with on loose core 12 and front mould 2 connect, be convenient to form erecting bed endoporus and outer shroud; The tubular be movably installed with in third through-hole for the bolt column 11 on part 8 is shaping is loosed core, limiting plate 15 is provided with cooperation for making tubular loose core the spring of die sinking and location ripple pearl.

Front mould 2 and ejector retainner plate 4 are provided with synchronous stripper apparatus, comprise the lever spanner 6 be arranged on limiting plate 15, ejector retainner plate 4 is provided with the servo-actuated push rod 7 connected with front mould 2, lever spanner 6 can rotate and connect with ejector retainner plate 4, when lever spanner 6 rotates by promote ejector retainner plate 4 towards its on front side of rear mold 3 move, servo-actuated push rod 7 simultaneously on ejector retainner plate 4 will promote front mould 2 Slideslip forward, and the thimble 5 on ejector retainner plate 4 will promote part 8, make part 8 and the synchronous demoulding of front mould 2.

Be matched in clearance between the first through hole in thimble 5 and rear mold 3, ensure the exhaust in part forming process, effectively ensure the dimensional accuracy of part.

Front mould 2, rear mold 3, ejector retainner plate 4 and limiting plate 15 are provided with the wedge lock mechanism for locking after matched moulds, the lower retaining mechanism 14 that wedge lock mechanism comprises retaining mechanism 18 and arranges in rear mold 3, the outside of compound module and limiting plate 15 is inclined-plane, form the wedge shape that upper end size is less than lower end size, upper retaining mechanism 18 is closely fastened on to coordinate in this wedge shape and with lower retaining mechanism 14 and connects.

The utility model main working process and principle: first snap on front mould 2 and loose core 12, then by loose core 12 and rear mold 3 carry out matched moulds, now part thimble 5 end will with on loose core 12 and front mould 2 fit, ejector retainner plate 4 and limiting plate 15 connect, then penetrate in rear mold 3 overlap loose core 17 and tubular loose core, locked by upper retaining mechanism 18 and lower retaining mechanism 14, and casting mouth is being set with module and front mould 2 joint, inject wax from casting mouth and carry out the shaping of part 8 and rising head 9, after shaping, take off successively retaining mechanism 18 and on loose core 12, the spring now coordinated and location ripple pearl will loose core to tubular and carry out die sinking, take out overlap and loose core 17, and then promote ejector retainner plate 4 by lever spanner 6, thimble 5 on ejector retainner plate 4 promotes part 8 and rising head 9, servo-actuated push rod 7 simultaneously on ejector retainner plate 4 promotes front mould 2, carry out part 8, the synchronous demoulding of rising head 9 and front mould 2, until ejector retainner plate 4 connects with rear mold 3, post 10 will be streamed and release the first through hole completely, erecting bed is released the second through hole, ejector retainner plate 4 is driven to automatically reset by lever spanner 6, then promote front mould 2 along guide rail 16 Slideslip forward, until bolt column 11 departs from third through-hole completely, take out part 8 and the rising head 9 of one, complete one-shot forming.

Can one-shot forming in the cavity that the utility model makes part 8 and rising head 9 be formed in front mould 2 and rear mold 3 etc., the precision casting mold that the utility model provides can be made the one-shot forming of tile foundry goods, press bending operation without the need to subsequent thermal, and the distortion difficult problem that can solve on mould after the depanning of wax part, for the production of the precision casting mould of fanjet combustion chamber floating wall tile, key effect is played to the floating wall tile foundry goods accuracy of manufacture.

The utility model is exactly the precision casting mold developed for novel short annular combustion chamber floating wall tile, adopt horizontal die structure, the forming surface of mould is changed into taper seat shaping by original planar shaping, rising head 9 and part 8 are directly merged into entirety by outer conical surface, so namely, serve and strengthen anti-deformation effect, the secondary deformation produced when turn avoid welding rising head, also improves production efficiency simultaneously, achieves the industry conical floating wall tile one-shot forming first.This mould mainly have employed automatic mold splitting technology, reasonable layout mould core pulling position and running gate system integral structure, all represent the highest level of industry investment casting mould design, casting technique is changed into part 8 taper seat essence type casting moulding, without the need to follow-up hot pressing, improve part qualification rate with this; Innovate in the processing of mould employ laser boring, high precision electro cuts, the laser welding technology of many thimbles 5 and ejector retainner plate 4 and the overall High Speed Milling Operation of many thimbles are processed top type technology etc. and completed the little hole machined streaming post and air film hole, greatly improve the range of work of precision component, and overcome an a series of difficult problem.

1) die sinking direction is determined: first establish part 8 putting position in a mold, by traditional upper lower open die mode, be improved to Horizontal mould-opening mode, use 12 shaping works completing rising head of loosing core, design servo-actuated push rod 7, promote while thimble 5 completes and deviate from the part 8 streaming post holes and air film hole at ejector retainner plate 4, the servo-actuated push rod 7 be set on ejector retainner plate 4 promotes front mould 2 and travels forward and finally thoroughly to be taken out by part 8.Such method solves the situation that horizontal die easy overturning when part 8 is released causes damaging, the structure achieving the one-body molded part 8 of running gate system and rising head 9 of innovation.There is the servo-actuated push rod 7 of the both sides of the guide rail 16 on base plate and front mould 2 and rear mold 3 to lead in mold movement simultaneously simultaneously, make mould more steady, smooth and easy.

2) matched moulds locking and automatic die opening mechanism is designed, utilize and be installed on spring in limiting plate 15 and location ripple pearl and complete the die sinking action that tubular looses core, utilize wedge pressure locking structure to complete mould assembling action and mold-locked by the cross component force of vertical clamping pressure, realize the automatic operation of all side cores and the reseting movement of ejector retainner plate 4.Ejecting of ejector retainner plate 4 can be completed like a cork by lever principle design depression bar thus promote part 8, rising head 9 and front mould 2 and move, make part 8 depart from template completely, thus realize the taking-up of part 8.

3) processing of post 10 and air film hole is streamed: it is shaping along cylinder to stream post 10, in order to easy to process on mould, first in rear mold 3, make the first through hole block with thimble 5 again, first through hole due to size less, first throw a hole into the laser of digital control perforating machine, then form with Precision wire of being careful (silk thread) cutting.Subsequently thimble 5 is bumped into ejector retainner plate 4 by upper laser weld firmly after meet depth of cavity requirement by High Speed Milling Operation processing thimble 5 top type again, wherein the end of part thimble 5 is in the first through hole, column type chamber is streamed in formation, another part passes completely through the first through hole, and connect with front mould 2 and the end face of above loosing core on the right side of 12, be convenient to the air film hole on forming part 8.

4) solve and stream post 10 and be stranded the difficult problem that gas and part 8 eject

Due to the particularity of part 8, stream post 10 and be difficult to depanning, and be not fully filled because tired conductance causes part 8.The method solved makes the first through hole in rear mold 3, and each first through hole mixes thimble 5, utilizes thimble 5 to eject and streams post 10, also utilizes the matched in clearance between thimble 5 and the first through hole to ensure the exhaust in part 8 forming process.Again thimble 5 is fixed on ejector retainner plate 4 by the mode of laser weld, utilizes the via hole of rear mold 3 to complete guiding, ensure that in the utility model die sinking process even for the ejecting force of part 8 simultaneously, prevent because undue force cause streaming the fracture of post 10.

5) solve bolt column and take out block and a perforations adding difficult problem

Because bolt column 11 becomes normal orientation with erecting bed with tile cambered surface, need overlap loose core 17 and tubular loosed core shaping.But because the distance between bolt column 11, erecting bed and thimble 5 is all very near, normal direction is loosed core and can be formed interference.So have employed overlapping insert design technology and movable install overlap loose core 17 and tubular loose core, avoid and interfere position.Come when the position of cutting away rising head after part casting complete has aperture not cast out, available laser adds work on foundry goods.

Part 8 of the present utility model is floating wall tile, its structural representation is see Fig. 6, the utility model effectively improves the qualification rate of tile foundry goods, for solid foundation has been established in new machine scientific research from now on, the manufacturing technology of combustion chamber flame tube floating tile is had raising at full speed, for China develop four generation aero-engine in the manufacturing and designing of precision casting mould, have accumulated rich experience, provide technical basis to the manufacture of later like parts investment casting mould design.

In the utility model, have employed overlapping insert design technology, all stream post automatic ejection system, wax part anti-deforming structure, gas nib and stream the process technology of post, solve an aperture deep hole forming difficult problem, part ejects a difficult problem, along cone method to stud and the shaping difficult problem of erecting bed.Make mould quick, convenient in the application, effectively improve production efficiency and the qualification rate of wax part.This mold is the highest, the state-of-the-art mould of manufacturing process of the accuracy of manufacture in series of tiles Making mold in recent years, has very strong complex art representative, for mould similar from now on have accumulated rich experience.

Claims (8)

1. combustion chamber floating wall tile precision casting mold, it is characterized in that: the front mould (2) comprising base (1) and install successively on base (1), rear mold (3), ejector retainner plate (4) and limiting plate (15), and front mould (2), rear mold (3), ejector retainner plate (4) and limiting plate (15) can also coordinate formation to be used for part (8) one-time formed cavity by matched moulds, front mould (2), rear mold (3), ejector retainner plate (4) and limiting plate (15) are provided with the wedge lock mechanism for locking after matched moulds; The wall of rear mold (3) is provided with the first through hole; When front mould (2) and rear mold (3) are in matched moulds state, gap is left between ejector retainner plate (4) and rear mold (3), when front mould (2) and rear mold (3) are in die opening state, ejector retainner plate (4) connects with rear mold (3); And ejector retainner plate (4) is installed with several thimbles (5), thimble (5) all penetrates the first through hole, and wherein the end of a part of thimble (5) is positioned at the first through hole, formed be used on part (8) stream post (10) shaping stream column type chamber, the end of residue thimble (5) penetrates in cavity and connects with front mould (2); Rear mold (3), ejector retainner plate (4) with limiting plate (5) offers the second through hole and third through-hole that are connected, and be movably installed with in the second through hole and loose core (17) for the overlap that the erecting bed on part (8) is shaping, the tubular be movably installed with in third through-hole for the bolt column (11) on part (8) is shaping is loosed core.

2. combustion chamber according to claim 1 floating wall tile precision casting mold, it is characterized in that: be provided with loose core (12) on front mould (2), formed and be used for the shaping rising head die cavity of the rising head (9) that is connected with part (8), penetrate thimble (5) end in cavity with on to loose core (12) and front mould (2) connects.

3. combustion chamber according to claim 1 floating wall tile precision casting mold, it is characterized in that: rear mold (3) and limiting plate (15) are fixedly mounted on base (1), front mould (2) and ejector retainner plate (4) can slide, and front mould (2) and ejector retainner plate (4) are provided with synchronous stripper apparatus.

4. combustion chamber according to claim 3 floating wall tile precision casting mold, it is characterized in that: synchronous stripper apparatus comprises and can rotarily drive ejector retainner plate (4) and move and the lever spanner (6) resetted towards rear mold (3), lever spanner (6) is arranged on limiting plate (15), ejector retainner plate (4) is provided with the servo-actuated push rod (7) connected with front mould (2).

5. the combustion chamber floating wall tile precision casting mold according to claim 1 or 3, it is characterized in that: base (1) is horizontally disposed with and it is provided with the guide rail (16) slided for front mould (2), front mould (2) and rear mold (3) are vertical setting, form Horizontal mould-opening structure.

6. combustion chamber according to claim 1 floating wall tile precision casting mold, it is characterized in that: wedge lock mechanism comprises retaining mechanism (18) and the lower retaining mechanism (14) in the upper setting of rear mold (3), in the outside of front mould (2), compound module is installed, the outside of compound module and limiting plate (15) is inclined-plane, form the wedge shape that upper end size is less than lower end size, upper retaining mechanism (18) is closely fastened on to coordinate in this wedge shape and with lower retaining mechanism (14) and connects.

7. combustion chamber according to claim 1 floating wall tile precision casting mold, is characterized in that: be matched in clearance between the first through hole in thimble (5) and rear mold (3).

8. combustion chamber according to claim 1 floating wall tile precision casting mold, is characterized in that: limiting plate (15) is provided with loosing core the spring of die sinking and location ripple pearl for tubular of cooperation.