CN1686639A - Continuous casting device of non-ferrous metal drum type casting parts - Google Patents

Abstract

A conticaster for casting the non-ferrous metal drums is composed of machine frame, crystallizer installed on the machine frame, the runnber bush on said crystallizer, and a drawing mechanism under crystallizer and with sand core in said crystallizer for generating internal shape of casting. Its advantages are high setting speed, fine structure and high mechanical performance of castings.

Description

Continuous casting device of non-ferrous metal drum type casting parts

Technical field

The invention belongs to nonferrous materials moulding production field, particularly a kind of continuous casting device of non-ferrous metal drum type casting parts.

Background technology

In the prior art, non-ferrous metal drum class part mainly adopts the method for casting or forging to make.The non-ferrous metal drum class part simple for outer shape, that interior shape is complicated, mechanical property requirements is high, traditional production method is: water earlier and outpour the non-ferrous metal ingot casting, with the method for forging it is forged into barrel-shaped blank again, then, process interior shape with the method for machining again.But some position or some special shape are difficult to realize that therefore, the normal method of riveted joint that adopts is made processing up with the method for machining.When some more specifically shape or position, in the time of also can't realizing with the method for riveted joint, just can only process with the method for welding.The non-ferrous metal drum class part of producing like this, though can satisfy the requirement of mechanical property aspect, the cycle of processing is long, production cost is high, and also still there are a lot of problems in the mechanical performance at welding and riveted joint position.Therefore, said method is difficult to produce the satisfactory non-ferrous metal drum class of quality part, and the non-ferrous metal drum class part of producing also is difficult to satisfy the requirement on using.

At present, developed countries is produced this type of part and is mainly taked the method for casting, and promptly with the method one-time cast-forming of casting, has removed process such as machining and riveted joint, welding from, has shortened the production cycle, has also reduced production cost.In recent years, domestic also the beginning produced non-ferrous metal drum class part with the method for casting, and through testing and detecting, the non-ferrous metal drum class part that casts out can reach requirement basically aspect mechanical property, and near international most advanced level.But because the casting method built-in problem also has defectives such as many shrinkage cavities, shrinkage porosite in the inside of non-ferrous metal drum class part, and can't thoroughly eliminate, the mechanical performance of its inwall installation position also is difficult for guaranteeing.Simultaneously, the labour intensity of Foundry Production is big, and production environment is abominable, the percent defective height of foundry goods, and the metal bath utilization rate is low.

Continuous casting is a kind of method of metal material moulding, and this method can be produced the solid blank of all size, also can produce hollow tubular blank.Existing continuous casting process units mainly is made of frame, crystallizer, junner bush and pair roller squash type draw-gear etc.Crystallizer and junner bush are installed on the frame, and junner bush is positioned at the top of crystallizer, and pair roller squash type draw-gear is installed in the below of crystallizer, and the blank after the crystallization is constantly pulled out from crystallizer.When the casting tubular blank, also need an inner core is set in crystallizer, this inner core is fixed in the crystallizer, is used to form the inwall of tubular blank, and when continuous casting, inner core does not move with tubular blank.Described pair roller squash type draw-gear is made of the compression roller of paired setting, elastic pressuring clamping device, drive unit etc.Elastic pressuring clamping device is pressed on compression roller on the blank, and relatively rotates under the drive of drive unit, according to certain speed drawing blank.Because continuous casting adopts crystallizer that metal bath is forced cooling, casting cycle carries out continuously, and, the top of metal bath is opened wide all the time, therefore, it has effectively eliminated the defective such as shrinkage cavity, shrinkage porosite of foundry goods inside, and makes the further refinement of metallographic structure of foundry goods, thereby has improved the quality of foundry goods.The problem that above-mentioned continuous casting apparatus exists is, can only form projection or groove longitudinally in the inside of foundry goods, can't form horizontal or oblique projection or groove in the inside of foundry goods, can not cast out the boss or the groove of circle or rectangle in the inside of foundry goods.Thereby existing continuous casting apparatus also can't be produced interior shape complexity, non-ferrous metal drum class part that mechanical property requirements is high.

Summary of the invention

The technical problem to be solved in the present invention is, overcome problems such as the casting quality that exists in the above-mentioned prior art is poor, internal structure difficult forming, casting flaw, the complete accurate continuous casting device of non-ferrous metal drum type casting parts of internal structure such as good, the no shrinkage cavity of a kind of casting quality, shrinkage porosite are provided.

The present invention has a frame, crystallizer is housed on frame, junner bush is housed above the crystallizer, and its special character is that a haulage gear is arranged below crystallizer, on the drawing head of haulage gear, core is installed, core is arranged in crystallizer, utilizes the profile of crystallizer formation foundry goods, forms the interior shape of foundry goods with core, with haulage gear foundry goods and core are pulled straight from crystallizer again, thus the continuous casting of realization non-ferrous metal drum class foundry goods.

The invention has the advantages that:

1, adopt water mold that non-ferrous metal drum class foundry goods is forced cooling, so the setting rate of metal bath is fast, the solidified structure refinement has guaranteed that foundry goods has the good mechanical performance; Mode with continuous casting is produced foundry goods, and for foundry goods has been created desirable consecutive solidification condition, thereby the inside of foundry goods be difficult for to form casting flaws such as shrinkage cavity, shrinkage porosite, thereby improved the quality of foundry goods greatly.

2, adopt the inner core of core as foundry goods, and core is along with the formation and the foundry goods of foundry goods move downward synchronously, because motion mutually between core and the foundry goods, thereby, can produce the groove or the boss of different shape on the surface of core, no matter how complicated the interior shape of non-ferrous metal drum class foundry goods is, all can realize one-shot forming, and the surface quality of foundry goods is good, and internal structure is complete accurately.

3, casting speed is convenient to control, and casting length can arbitrarily be adjusted according to status of equipment, and casting process is realized automation control easily, and production environment is good, and labour intensity is low, operation, and the utilization rate height of metal bath easily, and the casting wasted product rate is low, the production efficiency height.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3, Fig. 4 are the structural representations of other embodiments of the present invention.

The specific embodiment

Embodiment 1:

As depicted in figs. 1 and 2, the present invention has a frame 1, and frame 1 usefulness sheet material and section bar welding are made; Crystallizer 13 is housed on the platform on frame 1 top, and crystallizer 13 is closed jacket structure for water, and a water inlet and delivery port are arranged respectively at an upper portion thereof and at a lower portion thereof; Junner bush 14 is housed on crystallizer 13, junner bush 14 is made of inner ring, outer ring, annular bottom plate, cone and annular supporting plate, annular bottom plate is positioned at the bottom of inner ring and outer ring, cone is positioned at the bottom of outer ring, the annular supporting plate is positioned at the outside of outer ring, the annular supporting plate is supported on junner bush 14 on the bearing 12, and bearing 12 is installed on the platform on frame 1 top; Several through holes 27 are arranged on the annular bottom plate of junner bush 14, and the effect of through hole 27 is that the nonferrous metal melts that is cast in the junner bush 14 is leaked downwards uniformly, and through hole 27 has 8 in the present embodiment, can increase and decrease according to actual needs; A haulage gear is arranged below crystallizer 13, described haulage gear is made of sliding support and drive unit, sliding support is made of guide rod 4, connecting plate 8 and connecting plate 2, described guide rod 4 adopts two, also can adopt three or four, to improve the stability of sliding support, connecting plate 8 and connecting plate 2 are separately fixed at the two ends of guide rod 4, and the three constitutes an integral body; Described guide rod 4 is installed in the fairlead 7, and fairlead 7 is fixed on the gripper shoe 6, and gripper shoe 6 is fixed on the frame 1, thereby sliding support is moved up and down in frame 1; Described drive unit is by screw 3, leading screw 5, gear 22, gear 23, reductor 25 and motor 26 constitute, screw 3 is fixed on the connecting plate 2 of sliding support, leading screw 5 matches with screw 3, its upper end is installed on the gripper shoe 6, the lower end is installed on the base plate of frame 1 by holder 24, gear 23 is installed in the bottom of leading screw 5, reductor 25 and motor 26 are installed on the base plate of frame 1, the turning cylinder of motor 26 is connected with the power shaft of reductor 25, gear 22 is fixed on the output shaft of reductor 25, and be meshed with gear 23, drive leading screw 5 rotations, because screw 3 is fixed, so the rotation of leading screw 5 has caused moving up and down of sliding support; Core 15 is installed on the drawing head of haulage gear, core 15 is arranged in crystallizer 13, transverse concave groove 17, longitudinal fluting 16, oblique groove 18, circular groove 19 and rectangular recess 21 are arranged on core 15, round boss and rectangular boss perhaps are set on core 15, to satisfy the interior shape requirement of foundry goods, the size of above-mentioned groove or boss, position and quantity determine that according to actual needs the preparation method of core 15 is identical with the preparation method of existing casting sand core; Described drawing head is made of bearing 9, backing plate 10 and core supporting plate 11, bearing 9 is fixed on the connecting plate 8 of sliding support, core supporting plate 11 is fixed on the core 15, backing plate 10 is between bearing 9 and core supporting plate 11, be used for regulating the port thickness of foundry goods 20, locate with pin between bearing 9, backing plate 10 and the core supporting plate 11, and be bolted together; The diameter of described core supporting plate 11 is greater than the diameter of backing plate 10, so that after nonferrous metal melts is solidified foundry goods 20 is spurred downwards; The present invention utilizes the inwall of crystallizer 13 to form the profile of foundry goods 20, form the interior shape of foundry goods 20 with core 15, again with haulage gear continuous pulling out from crystallizer 13, thereby realize the continuous casting of non-ferrous metal drum class foundry goods with foundry goods 20 and core 15.

Embodiment 2:

As shown in Figure 3, its structure such as embodiment 1, difference is, described drive unit is made of tooth bar 28, gear 29, reductor 25 and motor 26, the upper end of tooth bar 28 is fixed on the connecting plate 2 of sliding support, and the lower end of tooth bar 28 is installed in by holder 30 on the base plate of frame 1, and gear 29 is fixed on the output shaft of reductor 25, and be meshed with tooth bar 28, drive sliding supports by tooth bar 28 and move up and down.

Embodiment 3:

As shown in Figure 4, its structure such as embodiment 1, difference is, on core 15, also has horizontal strip bulge 31, strip bulge 31 also can be determined according to the interior shape requirement of foundry goods 20 around core 15 half cycles around 15 1 weeks of core, perhaps on core 15, be provided with and vertically reach oblique strip bulge, to satisfy the interior shape requirement of foundry goods 20; Described drive unit is a hydraulic jack 32, and the upper end of hydraulic jack 32 is installed on the connecting plate 2 of sliding support, and the lower end is installed on the base plate of frame 1, and hydraulic jack 32 drives sliding support and moves up and down.

During operation, earlier produce corresponding core 15 according to the interior shape of foundry goods 20, again core 15 is fixed on the drawing head of haulage gear, then, check the gap of core 15 and crystallizer 13 inwalls, make core 15 concentric with crystallizer 13, and with the end opening of crystallizer 13 and 11 sealings of core supporting plate, the metal bath of handling well is poured in the crystallizer 13, treat that metal bath is full of three of crystallizer 13/two o'clock, start haulage gear, foundry goods 20 and core 15 are pulled straight from crystallizer 13, and the control poring rate, the metal bath liquid level position in the crystallizer 13 is remained unchanged, finish up to continuous casting, after treating foundry goods 20 coolings, it is taken off, clean core 15 from the internal cleaning of foundry goods 20, smooth two ends can obtain the satisfactory non-ferrous metal drum class of interior shape part.

Claims (3)

1, a kind of continuous casting device of non-ferrous metal drum type casting parts, it has a frame, crystallizer is housed on frame, junner bush is housed above the crystallizer, it is characterized in that, a haulage gear is arranged below crystallizer, on the drawing head of haulage gear core is installed, core is arranged in crystallizer.

2, continuous casting device of non-ferrous metal drum type casting parts according to claim 1, it is characterized in that, transverse concave groove, longitudinal fluting, oblique groove, circular groove and rectangular recess are arranged on core, or round boss, rectangular boss, or horizontal, vertical, oblique strip bulge.

3, continuous casting device of non-ferrous metal drum type casting parts according to claim 1 is characterized in that, described haulage gear is made of sliding support and drive unit.

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