JP3102368U - Die casting machine for vertical press - Google Patents

Abstract

An object of the present invention is to provide a die casting apparatus for die casting of a cage type electric motor.
An apparatus for die-casting a cage-type electric rotor by a vertical press includes a plurality of lower die members and first and second rotary tables supporting a plurality of corresponding injection units. The tables partially overlap and are rotated synchronously to sequentially align each lower die member and the corresponding injection unit with the upper die member at the metal injection workstation. Each injection unit is provided with a control cylinder and a gripping member, a sleeve and a plunger, and a biscuit removal station, respectively, corresponding to a metal injection station, and an injection sleeve and a lower die member are rotated by a rotary table. It is movably supported and is raised and driven toward a stacked stack of rotors at the metal injection station of the press.
[Selection diagram] Fig. 1

Description

  The present invention relates to a die-casting apparatus for vertical presses, and more particularly to an apparatus for die-casting a cage type electric rotor for a small or medium-sized motor.

  Small and medium motors refer to motors having a rotor with a diameter of 25 to 200 mm.

  Small and medium-sized electric motors are widely used in various fields, for example, to operate various servo mechanisms in the field of the automobile industry.

  In view of large consumption and the need to minimize or limit production costs, there is currently a trend to use horizontal presses with multi-die assemblies or with several independent dies.

  Each die is axially aligned with the corresponding die on the opposite side to clamp one or more stacks of steel laminates that define the body of the rotor.

  Each die is provided with one or more annular grooves that communicate with corresponding annular grooves in the other die through longitudinal slots or holes in the stack of rotor stacks. A molten metal, such as an aluminum alloy, is injected into this hole to form a shorting ring and a longitudinal bar of the cage for circulating current.

  Horizontal multi-die presses allow for high injection rates with relatively short cycle times and costs that are considered commercially acceptable.

  For example, pressing with a die having 12 to 14 cavities to produce a rotor with a diameter of 25 to 35 mm allows a working cycle of 35 to 40 seconds. This corresponds to the production of one rotor every 2.5-3.3 seconds.

  However, horizontal presses have a number of limitations and disadvantages, such as excessive overall dimensions, the presence of heavy molds that cause problems during replacement, high investment costs, and difficulty in maintenance.

  In addition, a strong force of typically about 300-600 tons is required to clamp the mold in a vertical press.

  For example, U.S. Pat. Nos. 5,069,086 and 5,086,086 disclose single-station vertical die-casting presses, which have a less cumbersome structure than horizontal presses and require less pressure and force to clamp the mold.

  Typically, these types of presses include an injection sleeve for containing the molten metal and a plunger or piston member for injecting the molten metal into the forming cavity of the die. However, this type of press has the disadvantage of low productivity and relatively high cycle times, especially when casting small or medium diameter rotors.

  In order to partly eliminate this disadvantage, US Pat. Nos. 5,059,009 and 5,069,098 propose the use of a vertical press with a rotating table for supporting a plurality of die members and a single injection unit. With this type of press, moderate automation can be achieved, but the operating cycle is still relatively high and it has been found that the injection capacity is low compared to horizontal presses.

  U.S. Pat. No. 6,037,037, which shows the newest prior art, relates to a vertical die-cast press comprising a frame, a rotary table for supporting a plurality of injection units, and a stationary lower die member arranged on the table. The stationary lower die member is aligned with the upper die member to clamp the stack of metal stacks from which the molten metal is to be injected.

  The lower die member, together with the upper die member, provides a die cast mold that is driven from above toward the metal distributor or gate plate and toward the injection unit, which is sometimes stationary at the metal transfer station of the press. An indexing control means is provided for controlling the movement of the rotary table moving each injection unit between a work station for receiving the molten metal and a metal transfer station for injecting into the die mold. .

  As described therein, the partially salinated injection residue or biscuit in the sprue hole in the gate plate, which remains attached to the undercut dovetail slot at the top of the plunger, causes the plunger to enter the injection sleeve. And separated by moving down.

  When the table is indexed and rotated, the injection unit with the biscuits is transferred to a metal receiving station, where the biscuits are firstly pressed by a pushing device before the sleeve is freshly poured and filled with molten metal. Must be removed.

  However, this type of press does not yet provide a significant reduction in molding cycle time. The parts of the operation necessary for die-casting the rotor, in particular the cleaning operation of the dies, the loading of the metal stack, the injection of the molten metal, the casting of the rotor and the separation of the biscuits, take place at the following time at the same metal transfer station. Performed, which increases the casting cycle time.

  In addition, all clamping forces are transmitted directly on the axis of rotation of the support table, which causes large stresses on the table and the axis of rotation due to bending moments, which in turn cause the pressing of the press. Deformation or dysfunction may result.

Therefore, compared to known vertical presses, this type of press has a significantly shorter cycle time for casting, and especially as far as the manufacture of small or medium rotors is concerned.
Further improvements are needed to achieve a cycle time relatively equal to or shorter than the cycle time of a horizontal press.

In addition, there is a need to provide a vertical die cast press with high ergonomic properties to facilitate operator work during casting and during press maintenance work.
U.S. Pat. No. 4,088,178 U.S. Pat. No. 4,799,534 U.S. Pat. No. 3,315,315 U.S. Pat. No. 3,866,666 U.S. Pat. No. 5,660,223

  The main purpose of this model is to provide a die-casting device for die-casting of vertical presses, especially for electric motors of the cage type, thereby significantly reducing the die-casting cycle compared to known vertical presses. And a significantly limited cycle time relatively similar to or shorter than the cycle time of a horizontal press.

  A further object of this model is to provide an apparatus for die-casting an electric rotor having high ergonomic properties to facilitate the use and maintenance of the rotor by an operator.

  A key feature of this model is a vertical-press die-casting device for die-casting an electric rotor, which comprises a rotary table supporting a plurality of lower die members at an angle to each other, and a corresponding plurality of metal members. A rotary table for supporting the injection unit is provided. Here, the injection unit is axially movable with respect to the support table, and one of these turntables partially overlaps at the metal injection station and selectively and sequentially places each die member. , Configured and arranged to align with a corresponding injection unit, and sequentially moving the die member and the injection unit at another working station of the press.

  Each injection unit is axially positioned with a corresponding lower die member and upper die member, corresponding to a central injection or metal transfer station, under the control of an indexing means that moves the two tables incrementally synchronously. It is possible to match.

  In particular, each injection unit is movably supported axially relative to the respective table between a lowered position and a raised position, wherein the injection unit is driven tightly with respect to the lower die member. Is done.

  With this solution it is also possible to increase the productivity compared to a conventional vertical press, compared to a horizontal press for casting rotors with a diameter equal to or greater than 200/250 mm. It is particularly advantageous, for example, to make this type of press particularly suitable for forming small or medium-sized rotors having a diameter in the range of 25 to 200 mm, while at the same time, in terms of productivity, such a press should be a horizontal press. Further advantages remain over the advantages.

According to the present model, this problem has been solved by providing a die casting device for vertical presses. This device
A first turntable supporting a plurality of metal injection units;
A second rotary table supporting a plurality of lower die members,
The first and second turntables partially overlap and, when indexed and rotated, overlap each die member with each injection unit and with the upper die member at the metal injection station of the press. Is configured to allow alignment with these,
First and second indexing means for sequentially rotating the first and second tables to carry each lower die member and each injection unit around a plurality of respective workstations comprising metal injection stations of the press;
Each of the lower die members and each of the injection units are movably supported in a lower disconnected position, and an upper position, wherein both the injection units and the lower die members are connected to a metal injection station of a press. It is engaged in the aligned position and is driven upwards towards the stacked stack of rotors.

  These and further features according to the present model will become more apparent from the following description with reference to the accompanying drawings.

  The die casting apparatus according to the present invention is a die casting apparatus for a die-cast electric rotor of a vertical press, a first rotary table for supporting a plurality of metal injection units, and a plurality of lower die members. The first turntable and the second turntable partially overlap each other, and when they are indexed and rotated, the first turntable and the second turntable are in contact with each injection unit of each lower die member. The first and second indexing means are configured to allow for superposition and alignment with the upper die member at the metal injection station of the press, wherein the first and second indexing means comprise: The second table is rotated sequentially to connect each lower die member and each injection unit to the press having the metal injection station of the press. And each of the lower die members and each of the injection units are movably supported from an upper cut-off position, wherein both the injection units and the lower die members are in the upper position. Are engaged and movably supported from an upper position that is driven upward relative to the stack of rotor stacks, the positions being aligned with the metal injection station of the press, thereby achieving the above objectives .

  Each injection unit comprises a sleeve and a plunger movable axially in the sleeve, the device comprising a cooling means for cooling the lower die member and a separable, grasping biscuit on the plunger of each injection unit. Gripping means, and first and second control means selectively operable to continuously raise the sleeve relative to the lower die, the first and second control means respectively comprising: Lowering, thereby removing said biscuit from said lower die member and moving into said injection sleeve, disconnecting said injection unit from said die member at said metal injection station of said casting press, and control means. May be provided.

  A programmable electronic control unit that activates the first control means and the second control means to sequentially remove the biscuit from the lower die member by rearward movement of the plunger; The plunger may be retracted into the injection sleeve, and the injection sleeve may be separated from the lower die.

  A housing bush for the rotor slidably supported relative to the upper die member; thrust means provided and configured to remove the rotor from the upper die member; and removing the rotor from the housing bush. And control means operable with a fluid for moving the housing bush relative to the upper die member of the press.

  The thrust means may include a thrust member extending coaxially with the control means for removing the rotor from the housing bush.

  The thrust member may be operatively connected to a single-acting cylinder.

  The control means for removing the rotor comprises first and second linear actuators, wherein the control unit sequentially activates the first and second actuators while removing the rotor from the housing bush. May be programmed to cause the

  A biscuit removal station between the metal receiving station and the metal injection station, comprising a fixed gripper for the injection sleeve and an axially movable gripper for the plunger, the fixed and movable gripper comprising: As the support table of the injection unit rotates, each injection sleeve and associated plunger may be adapted and configured to engage and disengage.

  A locking device may be provided for locking the housing bush while injecting the molten metal into a stack of rotor stacks, and corresponding lower and upper die members of the press.

  The first control means for raising the injection unit may be configured at the same height on both sides of the second control means for the plunger of the injection unit.

  Each lower die member may be movably supported by the rotary table making a short vertical movement with respect to the upper die member toward a stop shoulder on the second rotary table of the press.

  The present invention provides a die-casting device for the die-casting of vertical presses, in particular of cage-type electric motors, whereby a significant reduction of the die-casting cycle can be achieved compared to known vertical presses. It is possible to achieve a very limited cycle time relatively similar to or shorter than the cycle time of a horizontal press.

  According to the present invention, it is possible to provide an apparatus for die-casting an electric rotor having high ergonomic characteristics in order to facilitate use and maintenance of the rotor by an operator.

  The general features of this model are shown below using a preferred embodiment.

  As shown in FIG. 1, a vertical press provided with a die casting device for forming a cage of an electric rotor supports each of a first rotary table 11 and a second rotary table 12 that rotate according to respective vertical axes. A frame 10 for carrying out. The second table 12 is arranged at a position that partially overlaps the first turntable 11. The second table 12 supports a plurality of lower die members 14 and the first table 11 has a corresponding plurality of injections to be conveyed continuously around a corresponding number of workstations, as described below. The unit 13 is supported.

  Each injection unit 13 moves axially relative to the table 11 between a raised position and a lowered position toward the lower die member 14 corresponding to the central injection or metal transfer station shown in FIGS. It is movable.

  An electric rotor of the cage type usually comprises a stack of metal stacks P and a metal cage for calculating the current, the two cages being longitudinally in the slots of the stacked stack between the shorting rings at the ends. Includes multiple bars that extend.

  Each table 11 and 12 is configured to rotate progressively synchronously using respective electric power index control means 15 and 16, so that each injection unit 13 is axially moved with the corresponding lower die member 14. And sequentially moving and stopping the upper die casting member 17 in an aligned arrangement and corresponding to a metal transfer station for injecting molten metal into the stack of die members and the stack clamped therebetween. .

  In order to reduce the stress on the upper rotating table 12, the lower die member 14 is movably supported by the same table 12, thereby allowing a short vertical movement for tightening the stack P against the upper die member 17. To

  This is made possible by providing each lower die member 14 with an annular flange 63 which rests on the lower shoulder 64 of the pedestal in the turntable 12 with short vertical movement, as shown in FIGS. 12 and 9. Since the annular flange 63 has a thickness smaller than the height of the pedestal, it has a small gap 65 in the lowered state as compared with the upper stop ring 66 (see FIGS. 4 and 9), and Movement becomes possible.

  The same upper die member 17 is supported for up and down movement by the control unit 18 and is therefore connected to the frame 10 of the press.

  The turntables 11 and 12 are preferably in the form of a Maltese cross having four diametrically opposed arms, as shown in FIG. 10, and a corresponding number of injection units 13 and respective The member 14 is supported.

  In the example shown, the lower turntable 11 has four injection units 13 each comprising an injection sleeve 19 for containing the amount of molten metal indicated on the meter and a plunger 20 movable axially in this sleeve 19. Are supported at an angle of 90 °.

  Therefore, the upper turntable 17 supports four lower die members 14 at an angle of 90 °.

  Each injection sleeve 19 in the metal injection station is driven relative to the lower die member 14 of the turntable 12 and is in a raised position in FIG. 2 and at a slight distance from the table 12 on which the sleeve 19 is located, FIG. Can be moved to and from the lowered position shown in FIG.

  The sleeve 19 is guided in the axial direction by vertical movement by a guide bush 21 extending from the rotary table 11.

  For example, a plurality of four rods 22 corresponding to four corners of the rectangle extend downward from the sleeve 19, and the rods 22 are connected at their ends to a square flange 23, and the lower table 11 rotates. In the meantime, it is designed to engage with the fixed gripping member 24. The gripping member 24 is in the form of a fork member including two brackets 25 fixed to the upper surface of the support bush 26, and the bush 26 passes through a support plate 27 extending in a horizontal direction with respect to the support bush 26, and a first bushing 26. Connected to control means.

  The first control means comprises, for example, two hydraulic cylinders 28 ′ and 28 ″ arranged horizontally below the plate 27 and arranged symmetrically with respect to the vertical axis of the press, Hydraulic cylinders 28 ′, 28 ″ connect the frame 10 of the press with the side edges of the support plate 27.

  Within each injection sleeve 19, slide the thrust plunger 20 with the rod 20 'connected to the wide end 29 by the neck portion 29', the neck portion 29 'and the head 29 are then indexed by the table 11. During the rotation, it engages with a movable gripping member 30 connected to the second control means.

  The upper end of the plunger 20 is provided with gripping means for gripping a biscuit of residual metal which becomes a sprue hole 14 'lacking the die member 14 due to solidification of the previously injected molten metal.

  Preferably, the biscuit gripping means comprises at least one horizontally extending and tapering dovetail slot 20 '' on the front face of the plunger 20 having a radial profile diverging or converging.

  As shown in FIGS. 1 and 2, the movable gripping member 30 is a hydraulic control fixed below the plate 27 in a central position between the two side cylinders 28 ', 28' 'of the first control means. It is fixed to the upper end of the rod 31 of the second control means, which is fixed to the upper end of the rod of the second control means, such as the cylinder 32.

  The cylinders 28 ′, 28 ″ are arranged horizontally and at the same height as the second control means 32 of the injection unit 13, whereby a consistent reduction in the overall height dimensions of the device and the turntable 11 and Twelve low configurations are achieved, thus improving the ergonomics of the molding equipment in that it facilitates operator work.

  As shown in FIG. 6, the raising and lowering unit 18 of the upper die member 17 includes a bush 33 for accommodating the stacked stack P of the electric rotor, and a bush 33 having the upper die member 17 and the lower die member 14. Together define die casting.

  Each lower die member 14 and upper die member 17 may include one or more annular cavities for molding a corresponding number of rotors, especially rotors of small dimensions, for example, 30 mm, with four for each lower die member 14. It is possible to provide up to three cavities, but only one cavity is possible for larger size rotors (eg, 60 mm).

  The lifting and lowering unit 18 shown in FIGS. 6, 7 and 8 includes a cylindrical slide member 34 for supporting the housing bush 33, and the slide member 33 is provided on the upper crosspiece 10 'of the support frame 10. It is vertically movable along the guide hole in.

  Upon completion of the injection process and solidification, the slide member 34 is then operatively connected to means for removing the rotor from the housing bush 33. The rotor removal means comprises a first linear actuator such as a hydraulic cylinder 35 having a hollow piston 36 and a hollow piston rod 37. The hollow piston rod is connected to the upper die member 17 of the die cast mold.

  The cylinder 35 supporting the slide member 34 and the housing bush 33 extends upward from the upper crosspiece 10 ′ of the frame 10 and is connected to two hydraulic cylinders 39 ′, 39 ″ by a crossbar 38.

  The flat piston rod 37 constitutes a guide for a means for removing the rotor from the upper die member 17 when removing the molded product. The rotor removing means includes a bar 41 extending coaxially with the cylinder 35. The bar 41 is connected at its upper end to the piston 40 of a single-acting cylinder. A push element 42 is provided at the lower part of the bar 41, for example in the form of an upwardly facing bowl-shaped element, to push down the stack of magnetic laminations P of the rotor and to remove it from the die member 17.

  If the side locking device 43 is tightened against the lower die member 14 during the injection of the molten metal, this side locking device is provided to lock the slide member 34 and thus the housing bush 33. You.

  The die-casting device further comprises means for supporting the edge of the turntable 12 at the injection or metal transfer station, whereby any resistance which causes a stack of magnetic laminations during insertion into the housing bush 33, and The weight of the movable component of the unit 18 that rises while removing the rotor from the housing bush 33 is reduced. As shown in FIG. 6, the support means is, for example, in the form of a vertical arm 44 connected to the crosspiece 10 ′ of the frame 10, the lower end of which is a fork-shaped element 45 facing the edge of the table 11. To engage and support the edge of the table.

  The apparatus further comprises means for forced circulation of a cooling fluid to cool the lower die 14, allowing more efficient heat distribution, thereby achieving rapid solidification of the molten metal. As shown in FIG. 9, each lower die member 14 includes a channel 46 for circulation of cooling fluid supplied by a pressurized fluid source 47 through a rotary coupling (not shown). As far as possible in advance, it allows the solidification of the biscuit to be accelerated and allows the biscuit to be removed, removed from the lower die 14 and removed.

  In order to facilitate cooling of the rotor, the housing bushing 33 also has channels for circulating fluid which can influence the temperature but not reduce it excessively, without jeopardizing the metallic properties. (Not shown).

  As a result of working procedures specially designed to take advantage of the capabilities of the device itself, the above-described die-casting device provides a significant reduction in cycle time, and consequently increases the output.

  In particular, the four injection units 13 supported by the turntable 12 can be sequentially moved to workstations A1, A2, A3 and A4 (FIG. 10), where the following operations can be performed simultaneously.

  A1-At this workstation, the amount of molten metal indicated on the meter, taken from a melting furnace (not shown) located adjacent to the casting device, is supplied to the sleeve 19.

  A2-At this workstation, by utilizing the rotation of the table 12, first each sleeve 19 and plunger 20 is operatively connected to a respective hydraulic control cylinder 28 ', 28' 'and 32, where , In line with the lifting unit 18 of the upper die member 17 at the metal injection station. At A2, the sleeve 19 is raised toward the lower die member 14 in the upper position, driving the die member 14 upward toward the stacked stack P and the upper die member. Accordingly, the molten metal is transferred into the mold by raising the plunger 20, and the metal is injected through the sprue hole 14 'into the lower die 14, the pack of the laminated P, and the upper die member 14, and finally, After the set cooling time has elapsed, the plunger 20 and the injection sleeve 19 are lowered, and the lower die 14 is removed from the biscuit 48 in the sprue hole 14 'according to the exact procedure shown. 19 are separated.

  A3-At this station, the biscuit 48 is removed from the plunger 20 and delivered onto the chute 49 by a thrust member 50 actuated by a unique hydraulic cylinder 50 '(for illustrative purposes, turned sideways). 5)).

  A4-Each injection sleeve 19 at this station is cleaned and lubricated before returning to the metal receiving station A1.

  Thus, the lower die member 14 supported by the turntable 12 can be sequentially transferred to various workstations B1, B2, B3 and B4, where the following operations are performed simultaneously.

  On the B1-die 14, a stack of magnetic laminations P taken out of the conveyor 51 by the rotating arm 52 of the manipulator is loaded.

  B2--At this workstation, the stack of magnetic stacks P that are pre-loaded is surrounded by a housing bush 33. This is realized by operating the unit 18 that supports the bush 33 and the upper die member 17. Thereby, an injection mold of the molten metal is formed together with the lower die member 14.

  B3- At this workstation, after the rotor R has been removed from the lower die member 14 by a suitable extrusion cylinder 62 (FIG. 11), the rotor R is picked up by the rotating arm 53 (FIG. 10) and The stack P is transferred onto a conveyor 54 on the apparatus side facing the conveyor 51 side in order to supply the stack.

  B4-The lower die 14 undergoes a final cleaning and lubrication step after the molded rotor R has been removed.

  According to this model, the reduction in casting cycle time is achieved primarily during the biscuit 48 removal and removal process. In particular, once the molten metal has been injected into the slots of the stack P and the cavities of the casting dies 14, 17, corresponding to the injection metal stations A2, B2, the molten metal is cooled rapidly, whereby the die The temperature of lower die member 14 is affected by the forced circulation of cooling fluid through channels 46 in 14. This causes rapid shrinkage of the metal, thereby facilitating subsequent removal of biscuit 48 from lower die 14.

  To facilitate movement of the plunger 20 within the sleeve 19, these temperatures are also affected by a cooling fluid circulated through a suitable channel (not shown).

  Next, the plunger 20 is first moved back by actuating the hydraulic cylinder 32 (shown in FIG. 3), thereby breaking the biscuit 48 by the short-circuit ring of the rotor R. The rearward movement of the plunger 20 causes the removal of the biscuit 48 from the lower die member 14 and the attraction of the biscuit inside the injection sleeve 19.

  The injection sleeve 19 is further lowered by actuating the hydraulic cylinders 28 'and 28' '(shown in FIG. 4), thus disconnecting the injection sleeve from the lower die 14 and thereby the tables 11 and 12 Rotation becomes possible. The lowering of the injection sleeve 19 described above can be performed simultaneously with or subsequent to the retraction of the plunger 20, which is in the range of a few millimeters, preferably 1 to 10 mm, and therefore of the injection sleeve 19 Enables quick movement.

  In this way, it is possible to rotate the table 12, thereby moving the injection unit 13 from the workstation A2 to the workstation A3 for removing and removing the biscuit 48.

  Two brackets 57 designed to engage the flanges 23 of each injection unit 13 during rotation of the table 12, corresponding to the workstation described above for removing the biscuits 48 (shown in FIG. 5). An operating means is provided, such as a jet cylinder 55 connected to a second or fixed gripping member 56 having

  Similarly, the widening head 29 at the rear end of the rod of the plunger 20 then engages with a second or movable gripping member 58 connected to the rod of the ejection cylinder 55 while the table 12 rotates. I do. The ejection cylinder is movable between a front position and a rear position.

  Thus, the ejection cylinder 55 may be controlled, thereby raising the plunger 20 far enough to raise the biscuit 48 outside the injection sleeve 19, until the biscuit 48 is released from the dovetail gripping means 20 ''. Sliding horizontally allows the side thrust member 50 to remove the biscuit 48.

  To facilitate engagement and / or disengagement between the widening head 29 of the plunger 20 and the second or movable gripping member 58, the movable gripping member 58 is acted upon and moved slightly forward. A bias spring means 59, such as a coil spring, is provided corresponding to the rearward position, thereby limiting the drag between the head 29 and the gripping member 58 and the resulting wear.

  Once the molten metal has solidified, the rotor R is removed from the housing bush 33 by exerting a first downward thrust on the rotor R, holding it against the lower die member, and at the same time the bush 33 is free upward. To be able to slide.

  The short circuit ring of the rotor, in turn, exerts a second axial downward thrust on the stack of magnetic stacks P by actuating the rotor removal means and lowering the piston 40 to which the push element 42 is connected. It is removed from the upper die member 17.

  The upward movement of the bush 33 is then continued by actuating the hydraulic cylinders 39 'and 39' ', whereby the upper table 12 can be rotated, shifting the rotor towards the work station B3. Then, a take-out process is performed.

  The working process is repeated iteratively to cast further rotors, with the table 11 supporting the injection unit 13 and the table 12 supporting the lower die member 14 progressively or in index mode, the workstations A1, A2, At each of A3 and A4, and at each of workstations B1, B2, B3 and B4, the respective operations described above are performed simultaneously to rotate synchronously.

  FIG. 11 shows a hydraulic control diagram of the die casting apparatus. Here, each hydraulic control cylinder is controlled by a respective solenoid valve 60A-60H that receives a control signal from an electronic control unit CPU programmed to control the circulating operation of the device.

  In particular, hydraulic power unit 61 provides pressurized fluid to solenoid valves 60A-60H that control the operation of the hydraulic cylinders of the device in response to signals received from the CPU.

  The CPU then obtains the indexed outlet signal from the turntables 11 and 12, which allows to adjust various exercises.

  In addition, the CPU is programmed to operate the first control means 28 ′ and 28 ″ of the injection sleeve 19 and the second control means 32 of the plunger 20, and optionally, to move the plunger 20 into the injection sleeve 19. The biscuit is removed from the rotor and removed from the lower die member 14, and the injection sleeve 19 is lowered to separate it from the lower die 14.

  The following two comparative tables 1 and 2 obtained respectively from the tests performed on the vertical press according to the model and on the conventional horizontal press show that the die-casting device according to the model has a significant advantage over the conventional horizontal press. It is shown that.

上記の表から、同じ直径のロータについて、各ロータをキャスティングする本モデルによる装置によって必要とされる時間は、小さい直径のロータの水平プレスの時間と等しく、より大きい寸法のロータについてはかなり短いことが見出される。

From the above table, it can be seen that for rotors of the same diameter, the time required by the apparatus according to this model for casting each rotor is equal to the time for horizontal pressing of smaller diameter rotors and considerably shorter for larger size rotors. Is found.

  Therefore, considering that the investment required to purchase a vertical press according to this model is smaller compared to a horizontal press, the smaller the overall dimensions and the greater the ergonomics of the operator, the greater the investment required by this model. It is clear that vertical press equipment has significant advantages over both conventional vertical and horizontal presses.

  What has been described and illustrated with reference to the accompanying drawings is given by way of example only to illustrate general features and preferred embodiments of the model. Accordingly, other modifications and alterations to the apparatus for casting an electric rotor are thereby possible without departing from the scope of the appended utility model claims.

  An apparatus for die-casting a cage-type electric rotor by a vertical press includes a plurality of lower die members and first and second rotary tables supporting a plurality of corresponding injection units. The tables partially overlap and are rotated synchronously to sequentially align each lower die member and the corresponding injection unit with the upper die member at the metal injection workstation. Each injection unit is provided with a control cylinder and a gripping member, sleeve and plunger, respectively, which can be engaged and disengaged, and a biscuit removal station corresponding to the metal injection station, respectively. It is movably supported and is raised and driven toward a stack of rotor stacks at the metal injection station of the press.

  As described above, the present invention has been exemplified using the preferred embodiment of the present invention, but the present invention should not be construed as being limited to this embodiment. It is understood that the scope of the present invention should be construed only by the claims of the utility model. It is understood that those skilled in the art can implement an equivalent range based on the description of the present invention and common technical knowledge from the description of the specific preferred embodiments of the present invention. It is understood that the contents of the patent documents cited in the present specification should be incorporated by reference into the present specification in the same manner as the content itself is specifically described in the present specification.

FIG. 1 shows a front view of a vertical press with a device for die-casting a cage-type electric rotor according to the present model. FIG. 2 shows an enlarged detail of FIG. 1 for the injection plunger in the advanced position. FIG. 3 shows an enlarged detail of FIG. 2 with the sleeve of the injection unit in an elevated position with respect to the lower part and the biscuits in the sleeve. FIG. 4 shows an enlarged detail of FIG. 2 for the injection unit in the lowered position. FIG. 5 shows a station for removing biscuits and a corresponding injection unit. FIG. 6 shows another enlarged detail view of FIG. 1, showing the rotor clamped between the upper and lower die members, and the device for removing the rotor molding. FIG. 7 shows an enlarged detail of FIG. FIG. 8 shows another enlarged detail of FIG. FIG. 9 is a sectional view of the lower die cast member. FIG. 10 is a plan view of a turntable for supporting and moving the lower die member and the injection unit around respective work stations of the press. FIG. 11 shows a control diagram of the die casting apparatus of FIG.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 11 Rotary table 12 Rotary table 13 Injection unit 14 Lower die member 15 Electric power index control means 16 Electric power index control means 17 Upper die member 18 Unit 19 Sleeve 20 Plunger 21 Guide bush 22 Rod 23 Flange 24 Fixed gripping member 25 Bracket 26 Bush 27 Support plate 28 'Hydraulic cylinder 28''Hydraulic cylinder 30 Movable gripping member 32 Control means 34 Slide member 35 Hydraulic cylinder 36 Hollow piston 38 Crossbar 39 Hydraulic cylinder 44 Vertical arm 47 Fluid source

Claims (11)

A die casting device for a vertical press die casting electric rotor,
A first turntable for supporting a plurality of metal injection units;
A second rotary table for supporting a plurality of lower die members,
The first turntable and the second turntable partially overlap and, when they are indexed and rotated, overlap each lower die member with each injection unit and the metal of the press. At the injection station, these are configured to allow alignment with the upper die member,
A first and a second indexing means rotate the first table and the second table sequentially to replace each lower die member and each injection unit with a plurality of respective ones comprising the metal injection station of the press. Provided around the workstation,
Each of the lower die members and each of the injection units are movably supported from an upper cut-off position, wherein in the upper position, both the injection units and the lower die members are engaged to form a stacked stack of rotors. A die casting apparatus movably supported from an upper position that is driven upwardly with respect to, and whose positions are aligned with a metal injection station of the press. Each injection unit comprises a sleeve and a plunger axially movable in the sleeve, the device comprising:
Cooling means for cooling the lower die member,
Detachable gripping means for gripping a biscuit on the plunger of each injection unit;
First and second control means selectively operable to continuously raise the sleeve relative to the lower die, wherein the first and second control means lower the plunger and the sleeve of the metal injection unit, respectively. Control means for removing the biscuit from the lower die member, moving into the injection sleeve, and disconnecting the injection unit from the die member at the metal injection station of the casting press. A die casting apparatus according to claim 1.   A programmable electronic control unit that activates the first control means and the second control means to sequentially remove the biscuit from the lower die member by rearward movement of the plunger; 3. The die casting apparatus according to claim 2, wherein the plunger is retracted into the injection sleeve and the injection sleeve is separated from the lower die.   A housing bush for the rotor slidably supported on the upper die member; thrust means provided and configured to remove the rotor from the upper die member; and removing the rotor from the housing bush. 2. The die casting apparatus according to claim 1, further comprising control means operated by a fluid for moving the housing bush with respect to an upper die member of the press.   The die casting apparatus according to claim 4, wherein the thrust means includes a thrust member extending coaxially with the control means for removing the rotor from the housing bush.   The die casting apparatus according to claim 5, wherein the thrust member is operably connected to a single-acting cylinder.   The control means for removing the rotor comprises first and second linear actuators, wherein the control unit sequentially activates the first and second actuators while removing the rotor from the housing bush. 4. The die casting apparatus of claim 3, wherein the apparatus is programmed to cause the die casting.   A biscuit removal station between the metal receiving station and the metal injection station, comprising a fixed gripper for the injection sleeve and an axially movable gripper for the plunger, the fixed and movable gripper comprising: 3. The die casting apparatus of claim 2, wherein the support table of the injection unit is adapted and configured to engage and disengage each injection sleeve and associated plunger as the support table rotates.   The die casting apparatus according to claim 4, comprising a locking device for locking the housing bush while injecting the molten metal into a stack of rotor stacks, and corresponding lower and upper die members of the press.   3. The die casting apparatus according to claim 2, wherein the first control means for raising the injection unit is arranged at the same height on both sides of the second control means for the plunger of the injection unit. .   2. The method of claim 1, wherein each lower die member is movably supported by the rotary table making a short vertical movement relative to the upper die member toward a stop shoulder on the second rotary table of the press. The die casting apparatus as described.

Images