阅读说明：本技术 一种叶片的铸造方法 (A kind of casting method of blade ) 是由 李昆 李永新 冯周荣 马文治 苏志东 张生存 于 2019-08-31 设计创作，主要内容包括：本发明属于铸造技术领域,特别涉及一种叶片的铸造方法,包括以下步骤：采用叶片的出水边朝上、进水边朝下的竖直放置方式,将若干件同尺寸类型的叶片旋转排列为一圈进行铸造工艺设计；然后通过模拟软件根据铸造工艺设计模拟出整体砂型；最后采用3D打印制作整体砂型。采用本发明提供的叶片的铸造方法,有效提高了冒口利用率,是现有技术中的出品率34％提高至39％,可节约约5t的钢合金钢水,且在满足铸件复杂的结构以及铸造所需的强度的同时,减少了芯盒制作等步骤,缩短了铸造周期,显著地提高了叶片的生产效率,减少工人的工作量。(The invention belongs to casting technology fields, in particular to a kind of casting method of blade, the following steps are included: using blade outlet edge upward, water inlet side vertical modes of emplacement directed downwardly, by several blades with Dimension Types be rotatably arranged for one circle carry out casting Technology Design；Then whole sand mold is simulated according to casting Technology Design by simulation softward；Whole sand mold is finally made using 3D printing.Using the casting method of blade provided by the invention, effectively increase riser utilization rate, it is that yield rate 34% in the prior art is improved to 39%, the steel alloy molten steel of about 5t can be saved, and while the intensity needed for the structure that meets casting complexity and casting, reduces core box production, shorten casting cycle, the production efficiency for improving blade significantly reduces the workload of worker.)

1. a kind of casting method of blade, which comprises the following steps:

Step S1, using blade outlet edge upward, water inlet side vertical modes of emplacement directed downwardly, by several with Dimension Types Blade, which is rotatably arranged, carries out casting Technology Design for a circle；

Step S2 makes whole sand mold using 3D printing.

2. the casting method of blade according to claim 1, which is characterized in that the blade being rotatably arranged in the step S1 Quantity be 12~20.

3. the casting method of blade according to claim 1, which is characterized in that casting Technology Design packet in the step S1 It includes: placing open riser between the outlet edge of adjacent blades, setting riser is subsidized below the open riser.

4. the casting method of blade according to claim 3, which is characterized in that the riser subsidy is arranged in adjacent two leaf On the outlet edge of piece, and extend along blade.

5. the casting method of blade according to claim 4, which is characterized in that the riser subsidizes the benefit extended along blade Contracting distance is 4 times of casting modulus.

6. the casting method of blade according to claim 4, which is characterized in that the riser subsidizes the thickness extended along blade Degree is designed using spheronization.

7. the casting method of blade according to claim 1, which is characterized in that 3D printing production is whole in the step S2 Sand mold process includes: the design feature of the dimensional parameters and whole sand mold in conjunction with 3D printing equipment, if whole sand mold is split as Dry sand core, prints each sand core using 3D printing equipment.

8. the casting method of blade according to claim 7, which is characterized in that if whole sand mold is split as the original of dry sand core Then: when splitting sand core, integral sand core, each sand core divisional plane and horizontal plane are divided between two neighboring blade.

9. the casting method of blade according to claim 8, which is characterized in that positioning is arranged on each sand core division surface Slot.

Technical field

The invention belongs to casting technology field, in particular to a kind of casting method of blade.

Background technique

Turbine blade structure includes water inlet side, outlet edge, upper crown, lower anchor ring, and blade is horizontally arranged, whole ruler Modest ability, height is low, wall thickness is relatively uniform, in the casting Technology Design method of the prior art, carries out in lower anchor ring setting open riser Feeding, and multiple subsidy optimization feeding gradients are set, sand core is made using core box, the method for sand core permutation and combination is formed.It is existing The casting method yield rate for having technology to use is low, and occupied space is big, and placer iron is relatively high, and serious waste resin sand, cost is difficult to Control；And there are drawbacks in terms of manufacturing the sand core period, and it is long using the core box production sand core time, since sand core quantity is more, lead Cause casting cycle long.

Summary of the invention

The object of the present invention is to provide a kind of casting methods of blade, and more than one piece is rotatably arranged with the blade of Dimension Types, And change the casting direction of blade in the prior art, and carry out sand core production using 3D printing technique, to overcome in the prior art Deficiency.

The object of the present invention is achieved like this:

A kind of casting method of blade, comprising the following steps:

Step S1, using blade outlet edge upward, water inlet side vertical modes of emplacement directed downwardly, by several with size class The blade of type, which is rotatably arranged, carries out casting Technology Design for a circle.

Step S2 makes whole sand mold using 3D printing.

As a further solution of the present invention: the quantity for the blade being rotatably arranged in the step S1 is 12~20；It is low It will lead to placer iron than high in the range, resin sand waste is serious；Casting mold thickness deficiency will be will appear higher than the range, exist and alter The hidden danger of steel.

As a further solution of the present invention: casting Technology Design includes: the water outlet in adjacent blades in the step S1 Open riser is placed between side, effectively increases riser utilization rate；Setting riser is subsidized below the open riser.

As a further solution of the present invention: need to guarantee when casting Technology Design in the step S1 adjacent two pieces blade it Between minimum mold thickness be 150mm.

As a further solution of the present invention: the riser subsidy is arranged on the outlet edge of adjacent two blade, and along leaf Piece extends.

As a further solution of the present invention: the riser subsidy is the 4 of casting modulus along the feeding distance that blade extends Times.

As a further solution of the present invention: the riser subsidy is designed along the thickness that blade extends using spheronization, is led to Cross spheronization design riser subsidy, at the same solve two blades because feeding gradient it is unsmooth caused by local molten steel premature solidification, riser Not the problem of middle molten steel benefit is not got off, preferably to guarantee feeding.

As a further solution of the present invention: it includes: in conjunction with 3D that 3D printing, which makes whole sand mold process, in the step S2 The design feature of the dimensional parameters of printing device and whole sand mold, is split as several sand cores for whole sand mold, utilizes 3D printing Equipment prints each sand core, carries out a group core after each sand core printing and whole sand mold is made.

As a further solution of the present invention: if whole sand mold is split as the principle of dry sand core: when splitting sand core, adjacent Divide integral sand core, each sand core divisional plane and horizontal plane between two blades.

As a further solution of the present invention: locating slot is set on each sand core division surface.

The casting method of blade provided by the invention, since the outlet edge wall thickness of blade is big, water inlet side wall thickness is small, using leaf The outlet edge of piece upward, water inlet side vertical modes of emplacement directed downwardly, the rationally effective feeding gradient having using blade itself, Reduce the arrangement quantity of riser；Several blades with Dimension Types are rotatably arranged and are cast for a circle, are rotatably arranged When on the basis of guaranteeing that minimum mold thickness is 150mm between adjacent two pieces blade, radius of turn is smaller, saves resin sand amount and gets over It is more, space utilization rate is significantly improved using rotation mode arrangement casting, reducing placer iron ratio, (placer iron ratio is in Foundry Production The ratio between molding sand consumption and production casting amount)；And using the technological design for placing open riser between the outlet edge of adjacent blades Method effectively increases riser utilization rate, is that yield rate 34% in the prior art is improved to 39%, the steel that can save about 5t closes Golden molten steel.

Since the mode period of traditional core box production sand core is longer, and core box goes out the mode of core and is difficult to meet several blades rotations The structure of intensity needed for one circle arrangement casting and complexity, the present invention make whole sand mold using 3D printing, and rationally setting is whole If sand mold is split as the principle of dry sand core, while the structure and casting for meeting casting complexity required intensity, reduce Core box production and etc., casting cycle is shortened, improves the production efficiency of blade significantly, reduces the workload of worker.

Detailed description of the invention

Attached drawing 1 is the structural schematic diagram of blade of the present invention；

Attached drawing 2 is that blade of the present invention is rotatably arranged as a circle arrangement schematic diagram；

Attached drawing 3 is that position view is arranged in open riser of the present invention；

Attached drawing 4 is the whole sand mold structural schematic diagram of the present invention；

In figure: 100- outlet edge；200- water inlet side；300- open riser；The subsidy of 400- riser.

Specific embodiment

In conjunction with attached drawing of the invention, a technical solution of inventive embodiments is further described in detail.

In the present invention unless specifically defined or limited otherwise, term shall be understood in a broad sense, for the common of this field For technical staff, the concrete meaning of term in the present invention can be understood as the case may be.

A kind of casting method of blade, comprising the following steps:

Step S1, using blade outlet edge 100 upward, the water inlet vertical modes of emplacement directed downwardly of side 200, it is same by several The blade of Dimension Types, which is rotatably arranged, carries out casting Technology Design for a circle.

Specifically, direction is consistent when each blades arrangement, and the quantity for the blade being rotatably arranged is 12~20, is lower than the range Placer iron be will lead to than high, resin sand waste is serious；Casting mold thickness deficiency will be will appear higher than the range, exist and alter the hidden of steel Suffer from.

Preferably, casting Technology Design includes: the placement open riser 300 between the outlet edge 100 of adjacent blades, is effectively mentioned High riser utilization rate；Riser is set below open riser 300 and subsidizes 400, the water outlet of adjacent two blade is arranged in riser subsidy 400 On side 100, and extend along blade, riser subsidy 400 is along 4 times that the feeding distance that blade extends is casting modulus.Riser subsidy 400 along blade extend thickness using spheronization design, by spheronization design riser subsidy 400, while solution two blades because The problem of local molten steel premature solidification caused by feeding gradient is unsmooth, molten steel benefit is not got off in riser, preferably to guarantee feeding. And it need to guarantee that minimum mold thickness is 150mm between adjacent two pieces blade when casting Technology Design.

Step S2 makes whole sand mold using 3D printing.

Specifically, it includes: the dimensional parameters and whole sand mold in conjunction with 3D printing equipment that 3D printing, which makes whole sand mold process, Design feature, whole sand mold is split as several sand cores, prints each sand core using 3D printing equipment, each sand core printing finishes After carry out a group core whole sand mold be made.

Preferably, if whole sand mold is split as the principle of dry sand core: when splitting sand core, dividing between two neighboring blade Integral sand core can pass through leaf in this way to avoid sand mold divisional plane when group core so that single piece vanes are in complete sand core Piece casting, causes finally to be poured rear blade casting and fash casting flaw occurs.

Preferably, when splitting sand core, each sand core divisional plane and horizontal plane, two sand cores are not mutually when organizing core under core in this way Interference reduces the risk of sand core scratch damage, so that lower core group core is convenient.

Preferably, locating slot is set on each sand core division surface, and positioned in alignment slot when organizing core can ensure that sand core group core position in this way It is accurate to set, and while being guarantee group core is accurate, numbers on the non-fitting surface of each sand core, during core under reduction group core There is mistake.