CN214290739U - Novel squirrel cage motor rotor centrifugal casting die capable of cutting off pouring gate - Google Patents

Abstract

The utility model discloses a novel squirrel cage electric motor rotor centrifugal casting mould of sprue can be amputated relates to the mould design field of big-and-middle-sized squirrel cage three-phase asynchronous motor cast aluminum rotor casting. The device comprises an upper die, a middle die, a lower die, a gate cutting die tire, a molding and gate cutting shunting cap, a false shaft part and other parts. The upper die mainly comprises: the upper die base, the upper die breather plug, the upper die, the bolt and the pin are assembled; the lower die comprises: the lower die, the lower die base, the lower die vent plug, the bolt and the pin are assembled; the dummy shaft portion is formed of: the false shaft, key, panel, clamping ring, clamp plate are constituteed. Adopt the utility model discloses behind the above-mentioned structure, optimized production technology to guarantee to improve the purpose of cast aluminium rotor casting efficiency, improved finished product quality, reduced working strength simultaneously, the utility model has the advantages of simple structure, set up reasonable, the cost of manufacture low.

Description

Novel squirrel cage motor rotor centrifugal casting die capable of cutting off pouring gate

Technical Field

The utility model discloses a novel squirrel cage electric motor rotor centrifugal casting mould of sprue can be amputated, the mould design field of the big-and-middle-sized squirrel cage three-phase asynchronous motor cast aluminum rotor casting of concretely relates to.

Background

The squirrel-cage motor is a three-phase asynchronous motor formed by welding or casting aluminum bars or copper bars and short-circuit rings instead of winding a rotor winding by insulated wires, and is called a squirrel-cage motor. The squirrel-cage motor is one of three-phase asynchronous motors, which are divided into a squirrel-cage motor and a wound-rotor motor. The three-phase squirrel-cage asynchronous motor has the advantages of small volume, light weight, good quality and the like, so the three-phase squirrel-cage asynchronous motor is widely applied to agricultural production and township enterprises.

The cast aluminum rotor has the following advantages: (1) the groove shape of the rotor is not limited by the section of copper or aluminum, and the optimal shape can be flexibly designed according to the requirement of electromagnetic performance; (2) the cast aluminum conductor is filled in the whole rotor slot, the slot fullness rate is close to 100 percent, and heat conduction and dissipation are facilitated; (3) the cage bars, the end rings and the iron core form a firm whole, so that a rotor iron core fastener can be omitted or simplified; (4) the rotor fan blades, the cage bars, the end rings and the balance columns are cast at the same time, so that the heat dissipation efficiency can be improved; (5) the cast aluminum rotor has a symmetrical and compact structure and is easy to achieve mechanical balance; (6) short production period, less working hours and low cost. Is suitable for mass production.

Therefore, in the current motor manufacturing industry, the squirrel-cage three-phase asynchronous motor has wide production requirements, however, after the traditional cast aluminum rotor is poured, a pouring gate left on a cast aluminum iron core is removed mainly by means of manual chiseling, the workload is large, the section quality is poor, the method can not improve the working efficiency, and the working strength of workers can not be reduced. Therefore, a simple and rapid gate cutting process is required. In order to solve the problem, the patent designs a novel centrifugal casting mold for a squirrel-cage motor rotor, wherein the sprue can be cut off.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved is as follows:

to the not enough in the centrifugal casting technology of current rotor, the utility model provides a novel squirrel cage motor rotor centrifugal casting mould that can amputate runner has solved the problem that provides in the above-mentioned background art.

The technical scheme is as follows:

a centrifugal casting mould for squirrel-cage motor rotor with removable sprue is composed of upper mould, middle mould, lower mould, sprue-cutting shunting cap, false axle, etc.

One of them novel squirrel cage motor rotor centrifugal casting mould that can excise runner go up the mould mainly by: the upper die comprises an upper die base (1), an upper die vent plug (2), an upper die (3), a bolt (11) and a pin (12); the lower die comprises: the lower die comprises a lower die (8), a lower die seat (9), a lower die vent plug (10), a bolt (11) and a pin (12); the dummy shaft portion is formed of: the artificial shaft (4), the key (14), the gib (15), the pressing ring (6) and the pressing plate (7).

Novel squirrel cage electric motor rotor centrifugal casting mould's that can amputate runner theory of operation does: laminating the iron core rotor punching sheet on the dummy shaft, and placing a pressing ring embedded pressing plate under the assistance of an oil press when the iron core rotor punching sheet is laminated to a designed height; the upper die and the lower die are mounted in advance; the schematic of fig. 1 is vertically mounted on the centrifuge turntable after the iron core and the mold are preheated; starting a centrifuge, pouring molten aluminum which is smelted in advance from an upper die after the centrifuge reaches a specified rotating speed, casting a rotor core, and detaching the die after casting is finished; and cutting off the pouring gate while withdrawing the dummy shaft to finish casting.

(III) compare with prior art, the utility model has the following beneficial effects:

after the structure of the oil adding device is adopted, a novel squirrel cage motor rotor centrifugal casting mould of sprue has been optimized production technology to guarantee the purpose that improves cast aluminum rotor casting efficiency, improved finished product quality, reduced working strength simultaneously, the utility model has the advantages of simple structure, set up reasonable, the cost of manufacture low.

Drawings

Novel squirrel cage electric motor rotor centrifugal casting mould of sprue can amputate, the drawing concrete description is as follows:

fig. 1 is the overall structure installation schematic diagram of the present invention.

Fig. 2 is a gate cut mold.

Fig. 3 shows a molding and gate cutting manifold cap.

Fig. 4 is a schematic view showing a relative assembly relationship between the molding and gate cutting off and shunting cap and the gate cutting mold, which is shown in fig. 1.

FIG. 5 is a schematic view of a gate cutting mold.

Fig. 6 is a sectional view of the gate cut mold (fig. 5) a.

Fig. 7 is a view of a gate cut mold (fig. 5 and 6) K.

The parts in fig. 1 are specifically: the device comprises an upper die base (1), an upper die vent plug (2), an upper die (3), a dummy shaft (4), a middle die (5), a pressing ring (6), a pressing plate (7), a lower die (8), a lower die base (9), a lower die vent plug (10), a bolt (11), a pin (12), a rotor punching sheet (13), a key (14), an inlaid strip (15), a baffle (16), a forming and pouring gate cutting and shunting cap (17) and a pouring gate die tire (18).

Detailed Description

In order to make the utility model realize that the functions of technical means, creation characteristics and realization are easy to understand, the utility model is further explained below by combining the drawings and the detailed implementation mode. It is to be understood that the drawings in the following description are merely exemplary of some embodiments of the invention.

Referring to fig. 1, the following technical solutions are adopted in this embodiment: laminating an iron core rotor punching sheet (13) on the dummy shaft (4), and placing a pressing ring (6) and an embedded pressing plate (7) under the assistance of an oil press when the dummy shaft is laminated to a designed height; the upper die (3) and the lower die (8) are partially assembled in advance; after the iron core and the die are preheated, the iron core and the die are vertically arranged on a rotating disk of a centrifuge according to the schematic diagram of figure 1; starting a centrifugal machine, pouring molten aluminum liquid which is smelted in advance from a feeding port of an upper die after the centrifugal machine reaches a specified rotating speed, casting a rotor core, and detaching the die after casting is finished; and cutting off the pouring gate while withdrawing the dummy shaft to finish casting.

The false shaft removing process in the above embodiment specifically includes: after the iron core is cast on the centrifuge, the connecting rod between the upper die and the lower die is removed, and the upper die is removed; taking out the iron core and the middle mold together, wherein the middle mold can not be withdrawn temporarily, installing a gate cutting mold on the upper mold part, and inverting the iron core on a workbench of an oil press; and (3) removing the pressing ring (6) and the pressing plate (7), pressing the end part of the dummy shaft downwards by an oil press, ejecting the head part of the dummy shaft to the molding and sprue cutting and shunting cap (17) under the pressure, and cutting the sprue under the combined action of the molding and sprue cutting and shunting cap (17) and the sprue cutting mold (18), withdrawing the dummy shaft, arranging other related tools and returning.

Thus, the core casting and the gate cutting work are completed.

Claims (1)

1. The utility model provides a novel squirrel cage electric motor rotor centrifugal casting mould that can excise runner, structurally includes the upper die base, goes up mould breather plug, goes up mould, dummy shaft, well mould, clamping ring, clamp plate, lower mould, die holder, lower mould breather plug, bolt, round pin, rotor punching, key, panel, baffle, shaping and runner cut off the split stream cap, cut runner mould child, its characterized in that: the sprue cutting mold tyre and the molding and sprue cutting shunting cap are matched to form a notch which can directly cut off a sprue in the structure, and the notch is matched with the dummy shaft to directly cut off the sprue after the cast aluminum rotor is cast.

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