CN206716966U

CN206716966U - For casting the nonshrink easing core of propeller mesopore

Info

Publication number: CN206716966U
Application number: CN201720237848.5U
Authority: CN
Inventors: 孙向涛; 胡传林
Original assignee: ZHENJIANG ZHONGCHUAN WARTSILA PROPELLER CO Ltd
Current assignee: ZHENJIANG ZHONGCHUAN WARTSILA PROPELLER CO Ltd
Priority date: 2017-03-13
Filing date: 2017-03-13
Publication date: 2017-12-08
Anticipated expiration: 2027-03-13

Abstract

The utility model discloses a kind of nonshrink easing core for being used to cast propeller mesopore, it is divided into riser segments and mesopore body section, the top of the riser segments is cylinder, bottom is truncated cone-shaped, transition connects between top and bottom, and the mesopore body section is highly horizontally divided into crosspiece along mesopore, and the crosspiece is again along longitudinally split into some vertical blocks, the riser segments are water-glass sand material, and the mesopore body section is chill material.The utility model has the advantages that：1st, core split is designed, for the rising head structure different with mesopore body design and uses different materials, riser feeding effect is further lifted, and mesopore and end face shrinkage defect are greatly improved, and the mesopore especially suitable for super-huge propeller is cast；2nd, chill causes mesopore to be convenient to clean, and repeatable utilization；3rd, mesopore castability is significantly lifted, and significantly reduces soldering, improves operating efficiency and casting technique yield rate, has been saved casting metal, has been reduced production cost.

Description

For casting the nonshrink easing core of propeller mesopore

Technical field

It is particularly a kind of to be used to cast to form the core of cast-internal structure when the utility model is related to a kind of casting The core of propeller mesopore.

Background technology

The casting of propeller mesopore, because of the particularity of its structure, using core structure, centring hole uses strickle moulding, entirely Portion uses the moulded core of water-glass sand.But water-glass sand is also easy to produce in the case where being contacted for a long time with high-temperature metal Scab problem, increase follow-up mesopore cleaning difficulty, during machine adds, mesopore is second-rate, generally produces shrinkage defect, blade root Position be also easy to produce large area shrinkage cavity phenomenon, there is problem in feeding, large end face equally exists shrinkage porosite phenomenon, these be required for subsequently through Soldering could eliminate, and solder joint is more, will necessarily increase soldering man-hour, increase production cost.

Super-huge propeller, more than 50 tons, oar shell length is generally less than finished weight in more than 1700mm, propeller wall thickness Blade root thickness, blade root guide margin to large end face length are more than 200mm, and these features make it that its casting difficulty is also increasing, Mesopore and large end face casting flaw problem are more prominent, and Foundry Production is faced with bigger challenge.Traditional core structure, not Adapt to existing product casting to require, can not particularly meet that the mesopore casting of super-huge propeller requires.

Utility model content

Purpose of utility model：It is used to cast in propeller in view of the above-mentioned problems, the purpose of this utility model is to provide one kind The core in hole, improve shrinkage porosite, the casting flaw of shrinkage cavity, improve product castability.

Technical scheme：A kind of nonshrink easing core for being used to cast propeller mesopore, is divided into riser segments and mesopore body section, institute The top for stating riser segments is cylinder, and bottom is truncated cone-shaped, and transition connection between top and bottom, the mesopore body section is in Hole is highly horizontally divided into crosspiece, and for the crosspiece again along longitudinally split into some vertical blocks, the riser segments are water-glass sand material, The mesopore body section is chill material.

According to mesopore height, optimal, the mesopore body section is at least divided into two crosspieces.

According to median pore diameter, optimal, the crosspiece is divided into 8~10 pieces of vertical blocks, in order to subsequently enter to chill Row cleaning.

Optimal, the crosspiece is divided into the vertical block along radius.

Optimal, the crosspiece is divided into the vertical block.

Optimal, gap is left between the vertical block, the gap is 18~22mm, so that chill is under the condition of high temperature Free wxpansion can be reached, the and can free shrink in cooling procedure, in order to subsequently clear up chill, chill can be repeated Utilize.

Optimal, connected between the adjacent crosspiece for step, its lower surface of the crosspiece of top is concave surface, lower section Its upper surface of the crosspiece is convex surface, is on the one hand easy to being relatively fixed between crosspiece, on the other hand can prevent molten metal from entering Enter inside core, play sealing function.

Beneficial effect：Compared with prior art, the utility model has the advantages that：1st, core split is designed, for rising head The structures and use different material, riser feeding effect different with mesopore body design are further lifted, mesopore and end face contracting Loose defect is greatly improved, and the mesopore especially suitable for super-huge propeller is cast；2nd, chill causes mesopore to be convenient to clean, and It is repeatable to utilize；3rd, mesopore castability is significantly lifted, and significantly reduces soldering, improves operating efficiency and casting technique goes out Product rate, casting metal is saved, has reduced production cost.

Brief description of the drawings

Fig. 1 is the utility model structure diagram；

Fig. 2 is the crosspiece upper surface schematic diagram of embodiment 1；

Fig. 3 is the structural representation that the utility model casts propeller mesopore.

Embodiment

Below in conjunction with the accompanying drawings and specific embodiment, the utility model is furtherd elucidate, it should be understood that these embodiments are only used for Illustrate the utility model rather than limitation the scope of the utility model, after the utility model has been read, art technology Modification of the personnel to the various equivalent form of values of the present utility model falls within the application appended claims limited range.

A kind of nonshrink easing core for being used to cast propeller mesopore, as shown in accompanying drawing 1,2, is divided into riser segments 1 and mesopore sheet Body section 2, two parts make respectively.

Riser segments 1 are an entirety, and all water-glass sand materials, top is cylinder 11, and bottom is truncated cone-shaped 12, on Portion forms transition with bottom and is connected.

The all chill materials of mesopore body section 2, it is segmented, it is horizontal along height according to mesopore height, mesopore body section 2 2~3 crosspieces 21 are divided into, are connected between adjacent crosspiece 21 for step, its lower surface of crosspiece of top is concave surface, under Its upper surface of crosspiece of side is convex surface, is on the one hand easy to being relatively fixed between crosspiece, on the other hand can prevent from casting When molten metal enter core inside, play sealing function.According to median pore diameter, crosspiece 21 is divided into 8 along radius longitudinal direction decile again ~10 pieces of vertical blocks 22,18~22mm gap 23 is left between vertical block 22, so that chill can reach freely under the condition of high temperature Expansion, the and can free shrink in cooling procedure, in order to subsequently clear up chill, can be reused to chill.

Accompanying drawing 3 is the structural representation that the utility model casts propeller mesopore, and 3 be rising head, and 4 be oar shell.Riser segments phase Than in original overall circular table structure, being more favorable for feeding a casting, riser feeding effect is further lifted, and mesopore and end face lack Fall into and be greatly improved.

Claims

A kind of 1. nonshrink easing core for being used to cast propeller mesopore, it is characterised in that：It is divided into riser segments (1) and mesopore body section (2), the top of the riser segments (1) is cylindrical (11), and bottom is truncated cone-shaped (12), transition connection between top and bottom, The mesopore body section (2) is highly horizontally divided into crosspiece (21) along mesopore, and the crosspiece (21) is again along longitudinally split into some Vertical block (22), the riser segments (1) are water-glass sand material, and the mesopore body section (2) is chill material.
2. the nonshrink easing core according to claim 1 for being used to cast propeller mesopore, it is characterised in that：The mesopore sheet Body section (2) is at least divided into two crosspieces (21).
3. the nonshrink easing core according to claim 1 for being used to cast propeller mesopore, it is characterised in that：The crosspiece (21) 8~10 pieces of vertical blocks (22) are divided into.
4. the nonshrink easing core according to claim 1 for being used to cast propeller mesopore, it is characterised in that：The crosspiece (21) it is divided into the vertical block (22) along radius.
5. the nonshrink easing core for being used to cast propeller mesopore according to claim 1 or 4, it is characterised in that：The horizontal stroke Section (21) is divided into the vertical block (22).
6. the nonshrink easing core according to claim 1 for being used to cast propeller mesopore, it is characterised in that：The vertical block (22) gap (23) is left between, the gap is 18~22mm.
7. the nonshrink easing core according to claim 1 for being used to cast propeller mesopore, it is characterised in that：The adjacent horizontal stroke Connected between section (21) for step, the crosspiece (21) of top its lower surface is concave surface, and the crosspiece (21) of lower section is thereon Surface is convex surface.