CN105665643A

CN105665643A - Manufacturing method of 3D printing slant lathe bed casting

Info

Publication number: CN105665643A
Application number: CN201610214959.4A
Authority: CN
Inventors: 苗润青; 李栋
Original assignee: Ningxia Kocel Pattern Co Ltd
Current assignee: Shared Intelligent Equipment Co., Ltd.
Priority date: 2016-04-08
Filing date: 2016-04-08
Publication date: 2016-06-15
Anticipated expiration: 2036-04-08
Also published as: CN105665643B

Abstract

The invention relates to a manufacturing method of a 3D printing slant lathe bed casting. The manufacturing method of the 3D printing slant lathe bed casting comprises the following steps: a, setting a mould filling position, namely according to a pouring position setting principle, setting a casting guide rail at the bottom of a pouring direction; b, designing a pouring system form, and adopting an open type pouring system; c, adopting vertical core division, and carrying out core division on each inner cavity in the length direction, wherein quantity of the divided cores is one more than the quantity of the inner cavities; d, designing a sand core structure, after the core division is finished, carrying out cut-down and shape follow-up on sand cores, and then setting a locating structure which can be independently located at the bottom of each sand core; and e, carrying out combined core locating design, before a combined core is produced, brushing coating used for casting at a pouring system on a sand mould and the periphery of the pouring system, placing clay laths along the circumference, after the coating is dried, placing a filter screen on a locating sand mould, and carrying out final sand flowing, pouring and mould dismantling. The manufacturing method of the 3D printing slant lathe bed casting has the beneficial effects that sand usage amount, production cost and guide rail defect incidence rate in 3D printing of a slant lathe bed casting are effectively reduced, and production efficiency is improved.

Description

A kind of 3D prints the manufacture method of oblique bed casting

Technical field

The present invention relates to a kind of 3D of utilization printing technique to manufacture the casting method of oblique bed casting, be specifically related to a kind of 3D and print the manufacture method of oblique bed casting, belong to industrial machinery processing class field.

Background technology

In the industrial production, lathe is widely used in the processing of the parts such as instrument and meter, electronics, light industry, standard component, bearing industry, automobile fitting industry. Wherein, oblique bed casting is the main parts size of high-accuracy machining tool. In conventional cast industry, adopting pure manual manufacture, the production efficiency of this kind of scheme is low, and quality is unstable. Along with development and the popularization of 3D printing technique, oblique lathe bed is adopted the casting of 3D printing technique. 3D prints cored-up mould and belongs to containerless casting, saves moulding and the big operation of coremaking two, improves production efficiency and steady quality significantly. Printing a point core principle (point core quantity is few and facilitates sand removal flow coat) according to the peculiar structure of oblique lathe bed and 3D, it is adopted vertical point core, namely core is relatively independent in the horizontal direction. Include foundry goods profile, pouring and riser systems and other supplementary structure in each piece of core, for guaranteeing casting accuracy, core assembly need to be positioned by other frock.

It is longer that oblique lathe bed structure shows as length, and wall is thin. Uniformly, steadily, quickly filling type to realize molten iron in casting process, traditional handicraft running gate system is generally: cross gate adopts " U " type (as shown in Figure 1), returns guide rail, multipoint mode influent stream at the bottom of ingate. But, core design must comprise running gate system and guarantee certain mold thickness, considerably increases 3D and prints sand using amount, and placer iron ratio increases. According to counting statistics, running gate system sand body amasss the 10%-20% typically constituting from cumulative volume. Higher, lower in cost in order to make 3D print production efficiency, it is necessary to reduce this part sand using amount. For this, how to provide a kind of efficiently, the oblique bed casting manufacture method of low cost, be the purpose studied of the present invention.

Summary of the invention

In order to overcome the deficiencies in the prior art, the present invention provides a kind of 3D to print the manufacture method of oblique bed casting, by the improvement to casting system, reduce 3D and print placer iron ratio such that it is able to the 3D reducing oblique lathe bed prints sand using amount, improves production efficiency, reduce production cost, thus improving product quality.

In order to solve above-mentioned technical problem, the technical solution adopted in the present invention is: a kind of 3D prints the manufacture method of oblique bed casting, comprises the following steps:

Step a, fills type position and arranges, and according to pouring position setting principle, foundry goods guide rail is arranged on the bottom in cast direction;

Step b, running gate system form design, according to Design of Runner System principle, adopt unchoked running system, the sectional area ratio of described open casting system is 1:1.5-2:2-4, the sprue of described running gate system is arranged on termination, casting length direction, cross gate is located at bottom foundry goods, passageway oblique cut grafting is on cross gate top, guide rail influent stream is returned at the bottom of ingate, molten iron steadily enters intermediate rail by ingate after drainage screen, on described drainage screen top, slag trap is set, from intermediate rail to both sides drain, described drainage piece cross section guarantees that three guide rail liquid levels can rise simultaneously,

Step c, core piecemeal, adopt vertical point core, carry out a point core according to each grade of inner chamber on length direction, point more than inner chamber number one of core quantity;

Step d, sand core structure designs, after dividing core, carry out core cutting down conformal under ensureing mold thickness and bulk strength premise, core and close-over separating surface are cross gate top planes, such sand core structure does not comprise cross gate and bottom mold thickness, and then arranging bottom each piece of core can the location structure of location-independent;

Step e, core assembly Position Design, vertical point core, show as relatively independent in the horizontal direction, need to position, adopt close-over location, be formed can position the sand mold of perfect cooperation with core by mould, described sand mold includes location structure and running gate system, and each core arranges 2-3 positioning table; Before producing core assembly, close-over upper system and periphery thereof are brushed foundry facing and place mud bar along week, prevent runout, treat that coating is dried, location close-over places drainage screen, subsequently core is successively placed on the close-over of location by lower core location in order, after carrying out last quicksand, cast, shake out, namely obtains described oblique bed casting.

Further, in stepb, the minimum range of described cross gate distance foundry goods guide rail is not less than 100mm.

Further, in step d, described sand core structure includes foundry goods profile, pouring and riser systems, lifting structure, location structure, clamping structure.

The invention has the beneficial effects as follows: the 3D effectively reducing oblique bed casting prints sand using amount, production cost and guide rail defect incidence rate; Improve production efficiency.

Accompanying drawing explanation

Fig. 1 is running gate system schematic diagram after oblique bed casting improves.

Fig. 2 is oblique bed casting tradition running gate system schematic diagram.

Fig. 3 is that oblique bed casting 3D prints cored-up mould process schematic.

Fig. 4 is two kinds of running gate system core comparison diagrams.

Wherein: foundry goods profile 1, core 2, U-shaped cross gate 3, filter net sheet 4, ingate 5, cross gate 6, passageway sheet 7, scum silica frost bag 8, drainage piece 9, sand core positioning structure 10, location close-over 11, close-over location fit structure 12.

Detailed description of the invention

In order to make those skilled in the art be more fully understood that technical scheme, below in conjunction with specific embodiment, the present invention is described in further detail.

Below in conjunction with accompanying drawing 1-4, the present invention is further analyzed.

It is by the improvement to running gate system that a kind of 3D of the present invention prints the manufacture method of oblique bed casting, reduces 3D and prints placer iron ratio: cross gate is arranged on foundry goods bottom, returns guide rail influent stream at the bottom of ingate, cancels running gate system and takes up room; Technical solution of the present invention description includes following five step: a successively, fills the setting of type position;B, running gate system form design; C, core piecemeal; D, core concrete structure design; E, core assembly Position Design, as following:

Step a, fills type position and arranges, and according to pouring position setting principle (important feature is arranged on cast bottom, direction) as far as possible, guide rail belongs to casting important feature, should be arranged on the bottom in cast direction.

Step b, running gate system form design, according to Design of Runner System principle (fast Quick pouring, steady steadily cast, multiple spot influent stream alive and ingate are avoided flinging core as far as possible), adopt the sectional area ratio 1:1.5-2:2-4 of unchoked running system, sprue is arranged on termination, casting length direction, cross gate is located at bottom foundry goods and (is not less than 100mm from guide rail minimum range), passageway oblique cut grafting is on cross gate top, guide rail influent stream is returned at the bottom of ingate, molten iron steadily enters intermediate rail by ingate after drainage screen, on drainage screen top, slag trap is set, can scum silica frost and be unlikely to blocking drainage screen, for realizing Stable Filling, from intermediate rail to both sides drain, drainage piece cross section need to guarantee that three guide rail liquid levels can rise simultaneously by calculating or simulate, it is to avoid turbulent flow occurs.

Step c, core piecemeal, oblique bed casting structure each grade of inner chamber in the longitudinal direction is relatively independent, and sidewall gusset mostly is a plane, should adopt vertical point core, carry out a point core according to each grade of inner chamber on length direction, point more than inner chamber number one of core quantity.

Step d, core concrete structure designs, and after point core, carries out core cutting down conformal under ensureing mold thickness and bulk strength premise. As in figure 2 it is shown, core and close-over separating surface are cross gate top planes, such sand core structure does not comprise cross gate and bottom mold thickness, is effectively reduced 3D sand using amount; Traditional running gate system as shown in Figure 1 is not then accomplished. Last setting bottom each piece of core can the location structure of location-independent. Core after design should comprise foundry goods profile, pouring and riser systems, lifting structure, location structure, clamping structure etc.

Step e, core assembly Position Design, vertically divides core, shows as relatively independent in the horizontal direction, need to position.

As it is shown on figure 3, the technical program adopts close-over location, namely can positioning the sand mold of perfect cooperation with core by mould formation, sand mold includes location structure and running gate system, and each core arranges 2-3 positioning table; Before producing core assembly, close-over upper system and periphery thereof brush foundry facing and along arranging mud bar week, it is prevented that runout. Treat that coating is dried, place drainage screen in relevant position, subsequently core is successively placed on the tire of location by lower core location in order; Required oblique bed casting can be obtained after last quicksand, cast, shake out.

As shown in Figure 4, effectively reduce this series products 3D and print with shown in sand 10%-20%(Fig. 4 dash area), production efficiency is greatly improved, reduces production cost; Oblique bed casting adopts above running gate system, effectively reduces guide rail defect incidence rate.

Above technical scheme provided herein being described in detail, principle and the embodiment of the application are set forth by embodiment used herein, and the explanation of above example is only intended to help and understands the present processes and core concept thereof; Simultaneously for one of ordinary skill in the art, according to the thought of the application, all will change in specific embodiments and applications, in sum, this specification content should not be construed as the restriction to the application.

Claims

1. the manufacture method of the 3D oblique bed casting of printing, it is characterised in that comprise the following steps:

2. a kind of 3D according to claim 1 prints the manufacture method of oblique bed casting, it is characterised in that: in stepb, the minimum range of described cross gate distance foundry goods guide rail is not less than 100mm.

3. a kind of 3D according to claim 1 prints the manufacture method of oblique bed casting, it is characterised in that: in step d, described sand core structure includes foundry goods profile, pouring and riser systems, lifting structure, location structure, clamping structure.