JPH01146314A - Automatic assembly equipment of transformer core - Google Patents

Abstract

PURPOSE: To enable assembling the core of a transformer at a high speed without needing waiting time to each overhead type traveling crane, by installing each specific retaining frame, four platforms, and four overhead type traveling cranes. CONSTITUTION: The following are installed; a retaining frame 10 capable of moving between a station A for loading core thin plates and a station B for inclining a formed core, four independent platforms 7-9 for storing three columns and thin plates of a lower side yoke, which can move between thin plate supplying position around the retaining frame 10 of the station A and the position for loading thin plates which distant from the station A, and four overhead type traveling cranes 113 which can move radially around the station A, lift up thin plates from corresponding platforms 7-9, and arrange them on the retaining frame 10 when the crane is in the position of the station A.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic transformer core assembly device, particularly a type with three columns and two yokes, namely a fourth
Assemble the transformer core of the type with left column 1 on one side, right column 2 on the other side, column 3 in the middle, yoke 4 on the bottom side and yoke 5 on the top side as shown in the figure. Regarding automatic assembly machines that can.

However, the definitions of "right side,""center,""leftside,""upperside," and "lower side" are used only to simplify the following description.

[Prior art and problems to be solved by the invention]

It is well known that the core of a transformer consists of a thin plate structure. In this case, the sheet metal structure is divided into several layers, stacked one on top of the other, but suitably staggered so that the lines of joints never lie in the same plane.

FIG. 4 is a plan view schematically showing a transformer core of the type described above.

When assembling the transformer core, the upper yoke is installed at a later stage. The automatic assembly device according to the invention therefore only concerns the assembly of the sheets forming the three columns and the lower yoke.

As shown in FIG. 5, the core component, whether yoke or column, consists of several steps (11 in the example shown), the number of steps being always an odd number; The core is designated by the symbol ˜Gll, and is configured such that the cross section of each element of the core is substantially inscribed within a circle.

Obviously, the central step G6 is the thickest, and the remaining steps are arranged symmetrically on both sides of the central step.

Each step is composed of several layers of identical sheets, the number of which is generally between 2 and 4.

The various layers forming the core can be arranged sequentially in two different ways. In other words, one is "simple superposition method J
(simple superimposition)
The other is known as “complex superposition method J (com
plex superimposition).

FIG. 6 shows a pattern according to the simple superimposition method, where consecutive lines indicate the position of identical and superimposed lamellas of the i-th layer and dotted lines indicate the (i-1) and (i-th)
+1) Indicate the position of the identical and overlapping lamina of the th layer.

In this arrangement, the lamellae of each successive layer alternately occupy one of the two positions shown.

FIG. 7 shows a compound superposition pattern in which continuous lines at the ends of the columns and the lower yoke and in the central region of the lower yoke indicate the position of the central layer lamina. Meanwhile, the dotted lines indicate the positions of the overlapping layers of the central layer, and the ends of the overlapping layers are cut asymmetrically and staggered between the preset minimum and maximum values. ing.

For each step, the thin plates in both columns and the lower yoke are all the same, but for each layer, the thin plates are assembled alternately in the longitudinal direction.

One of the central columns and the same step lamellas are identical, but assembled in such a way that in opposite positions each layer is arranged symmetrically with respect to the central layer.

The thin plate forming the core is composed of a silicon steel plate of a suitable thickness (usually 0.2 to 0.4 mm) made of hardened particles.

The sheets are obtained from the silicon steel sheet by stamping and then metallized in reverse order relative to the order in which they must be laminated to form each element of the core (see Figures 8 to 10). will be integrated on the platform.

From the platforms 7.8 and 9 the sheets are transferred to a suitable support frame 10 (see FIG. 11). The support frame has three longitudinal members and two intersecting members to reproduce the shape of the transformer core.

In fact, the sheets of columns 1.2 and 3 must be transferred onto the three longitudinal members, and the sheets of yokes 4 and 5 onto the two intersecting members.

The support frame 10 must be suitably formed sufficiently rigid to carry out the operations to be imposed on the transformer core after the correct stacking of the laminae has been completed.

[Means and operations for solving the problem] The assembly device according to the invention has the object of automatically stacking the core laminae correctly starting from a platform which has to be arranged around the support frame. have.

According to the invention, therefore, a transformer core automatic for transformers of the type with three parallel columns and two yokes, in which the core laminations are stacked alternately in "simple" or "complex" form. An assembly device comprising a support frame movable between a station for loading core laminations and a station for tilting the formed core, and four for storing the laminations of the three columns and the lower yoke.
two independent platforms movable between a laminate supply position around a support frame of said loading station and a laminate loading position of said frame remote from said loading station; and said support frame; four overhead traveling cranes movable radially around the loading station of the crane, comprising means for lifting and moving and lowering the lamina in a horizontal plane, the lamina being moved radially around the loading station of the crane; adapted to be lifted from a platform and placed on the support frame when the crane is in position at the loading station. .

The support platform can be moved, for example via rails, from the location of loading the sheets in the reverse order as described above to a corresponding position around the support frame of the core being erected.

After the platform is ``empty'' due to assembly of the core on the support frame, it is returned to the loading area and prepared to form another core, and all of the core except the upper yoke is removed. Preparations are made to open up the area around the support frame into which the laminates have now been loaded.

At this point, the support frame is moved to another station where it is tilted into a vertical position so that the transformer can be completed.

According to the invention, four independent overhead traveling cranes are used to load the various core sheets in serial form onto the support frame from the various platforms.

These overhead traveling cranes are arranged in a ring around the supporting frame loading station and are sufficiently set back to allow the frame to move freely to and from the tipping station.

The circular arrangement of four overhead traveling cranes allows each of the cranes to operate sequentially and sequentially. However, each of these operation orders is 1
It is necessary that both the lowering of the frame supporting the sheets and the lifting of the empty frame be staggered so that they alternate without interruption.

The next two stages are identical, except that different cranes are used.

In this way, different laminas are successively placed on the support frame.

Of course, the movements of the four overhead traveling cranes must be programmed to take into account the different displacements of each lamella depending on the chosen arrangement.

In this way, the assembly of the transformer core can be done quickly without requiring waiting time for each individual overhead traveling crane.

EXAMPLES FIGS. 4 to 11 have already been illustrated in the first part of this specification, and the same figures are therefore used only for reference.

FIG. 1 shows a plan view of the support frame IO of the transformer core being assembled. The support frame 10 moves along rails 110 between a loading station (A) and a transformer core tilting station (B). At the loading station (A) the support frame 10
is in a horizontal position, on which the various core laminations are stacked in a continuous manner.

Once the core sheets have been stacked, the support frame IO is moved along the guide rails 110 from the loading station (A) to the diagonal station (B).

In FIG. 1, the support frame IO is illustrated in a still horizontal position at the tilting station (B). The support frame 10 is tilted into a vertical position by rotating it around its lower edge 111 using suitable equipment in a later step (not shown) which is not relevant to the invention.

The rails 110 must extend sufficiently to allow the frame IO to move between stations (A) and (B).

Referring to FIG. 1, there are two pairs of guide rails 112/S and 11 on the left and right sides of the loading station (A).
2/D are arranged, and these rails terminate at the front position without intersecting the rails 110 of the support frame 10.

Two symmetrically arranged overhead traveling cranes 113/ used for assembling the left and right columns of the transformer core at station (A)
S and 113/D are these rails 112. /S and 112/D.

Especially with reference to FIGS. 1 to 3, the overhead traveling crane 113/D is a rail! It will be seen that it is a gantry crane moving along 12/D.

The crane has a frame 114 with suction cups, which is actuated by scissor-like arms 115 for vertical movement. This scissor-like arm is directed by a frame 116 that does not move vertically.

Via suitable trolleys 117 and 118,
Frame 116 is movable both laterally and vertically in a horizontal plane.

The configuration schematically illustrated in FIGS. 2 and 3 is merely an example.

An important point to note is that the overhead traveling crane 113/D has the rail 11 perpendicular to the rail 110.
2/D, the slats of the right-hand column have to be conveyed from the platform 7 to the support frame 10 located at station (A).

This lateral movement (with respect to FIG. 1) must be accompanied by a vertical movement in order to lift each sheet from the stacking platform 7 and lower it onto the frame 10.

In addition to the dirt, auxiliary trolleys 117 and 118 that move slightly in the horizontal plane allow positioning of the slats according to the pattern illustrated in FIGS. 6 and 7, if desired. must be done.

Platforms 7.8 and 9 move from their respective working positions along the perimeter of the station (A) to the loading position (
(not shown). In this case, each platform has a corresponding overhead traveling crane 113/D, 113/
It must move in such a way that it does not interfere with the movement of S, 113/A and 113/B, and therefore runs on independent rails.

FIG. 2 shows the guide rail 119 arranged between the rails 112/D with respect to the platform 7 for the right-hand column.

The thin plates are arranged in piles 102 on the plant platform 7.
The sheets are lifted one by one by the suction cup frame. After that, in the next step, the gantry crane 113/
D is the support frame 1 located at station (A)
The transformer core runs above the location of the right column 2 of the transformer core, which is positioned on the 0.

In this position, auxiliary trolleys 117 and 118 move the suspended lamellas as shown in FIGS. Used to place the array in its correct final position in staggered conditions as required.

In a further step, the laminate is placed on top of the column 2 which is being assembled. After this, the frame 114 is lifted and the gantry crane 113/D is moved back.

Further, the gantry crane 113/D can function as the gantry crane 113/S without interference.

In other words, the left and right column lamellas are
They may also be positioned simultaneously with symmetrical movements.

Referring to FIG. 1, below the loading station (A) there is a third gantry crane 11 used to load the laminations of the lower yoke 4 onto the support frame lO.
3/B is placed.

The shape and operation of this gantry crane 113/B are similar to those of the overhead traveling crane 113/B.
/D and 113/S.

Therefore, the crane 113/B can move the guide rail 112/
B and acts in cooperation with a stacking platform 9 containing a lamella for the lower yoke.

Referring to FIG. 1, the shape of the gantry crane 113/A located above the station (^) is somewhat different. In fact, this crane's guide rail 112/
A is supported by a trolley 123, and the trolley 12
3 can move laterally on an auxiliary rail 124 orthogonal to the guide rail 110 of the support frame 10.

In actual operation, traveling crane 113/A operates almost symmetrically to traveling crane 113/B.

The former differs from the latter in that the former runs longer on the rail 112/A. This is because the traveling crane 113/A has to position the slats of the central column between the left and right columns and therefore must actually travel to the central part of the frame 10.

In addition to this, the auxiliary trolley 123 is connected to the rail 110
When moving from station (A) to station (B) after the assembly of the core thin plates is completed, the frame 10 has a free path. I will provide a.

Furthermore, it should be noted that the lifting frame 11
4 must carry out the operation of lifting the thin plate as well as the operation of lowering the thin plate, and also adjust the position back and forth in the horizontal plane with respect to the frame 10, taking into account the misalignment of the thin plates of different layers. There must be.

Only some of these modes of operation interfere with the corresponding operations of other frames 114.

Therefore, the movement of the various overhead traveling cranes must be programmed in such a way that work is continuous from one crane to another, thereby allowing all cranes to function continuously at a high production rate. Must be.

Accordingly, the operation of the overhead traveling crane and auxiliary equipment is preferably programmed and controlled by a computer. Furthermore, the crane and equipment are positioned and equipped with control sensors that can provide the necessary input data to the computer.

〔Effect of the invention〕

As described above, according to the present invention, the core of the transformer can be assembled at high speed without requiring waiting time for each overhead traveling crane.

[Brief explanation of the drawing]

1 is a plan view showing the arrangement of four overhead traveling cranes according to the invention with loading stations and stations for tilting the support frame; FIG. 2 is a plan view showing the arrangement of four overhead traveling cranes according to the invention; FIG. A cross-sectional view of one of the cranes seen from the X-X line, Figure 3 is the first
4 is a plan view showing the layout of a transformer core with three columns and two yokes, and FIG. 5 is a cross-sectional view taken along line Figure 6 is a diagram showing how the laminae of the transformer core are stacked on top of each other according to the ``simple stack''arrangement; Figure 7 is similar to Figure 6. In the diagram, "composite superposition method"
Figures 8 to 10 are diagrams showing the platform on which the column and lower yoke laminae are stacked in the reverse order of core assembly; Figure 11 is a diagram showing the arrangement of the transformer core laminae. FIG. 3 schematically shows a support frame for the invention, which must be formed sufficiently rigidly so that it can be tilted into a vertical position after stacking the core lamellas; (Explanation of symbols) A: Loading station, B: Incline station, 7 to 9: Platform, 10: Support frame, 113/port, 113/S, 113/B
,113/A...overhead traveling crane, 1
14... Frame, 115... Scissor-shaped arm, 11
7.118... Trolley (bicycle parking), 124... Auxiliary rail.

Claims (7)

[Claims] 1. Automatic transformer core assembly equipment for transformers of the type with three parallel columns and two yokes, in which the core laminae are stacked alternately in "simple" or "complex" form, comprising: a support frame (10) movable between a loading station (A) and a station for tilting the formed core (B), and a support frame (10) for storing the lamina of the three columns and the lower yoke; Four independent platforms (7-9) for sheet feeding positions around the support frame (10) of said loading station (A) and for sheet loading of said frame remote from said loading station (A). four overhead traveling cranes (113/D, 113/S, 113) movable radially around the loading station (A) of the support frame (10);
/B, 113/A), comprising means for lifting said lamella, moving it in a horizontal plane and lowering said lamella, said lamella being lifted from a corresponding platform (7-9) of said crane and said crane automatic transformer core assembly apparatus, characterized in that it is adapted to be placed on said support frame (10) when in the position of a loading station (A). 2. 2. The automatic transformer core assembly apparatus of claim 1, wherein each of said platforms and each of said overhead traveling cranes are provided with independent rails. 3. The overhead traveling crane (113/D,
113/S, 113/B, 113/A) each comprises a frame (114) suitably equipped with a suction cup, which frame lifts the laminate from the corresponding platform (7-9) and Automatic transformer core assembly apparatus according to claim 1, characterized in that the laminae are arranged on the support frame (10) one at a time. 4. Each of the frames (114) with said suction cups is provided with lifting and positioning means (115), preferably in the form of scissors, and movable in a horizontal plane to effect slight adjustments in the positioning of said lamina. Possible means (117, 118
4. The transformer core automatic assembly apparatus according to claim 3, further comprising: ). 5. The overhead traveling crane located between the loading station (A) and the tilting station (B) is provided with auxiliary guiding means (124), which allow the crane to move from one station (A) to the other station ( B) or vice versa when said crane is moved by said auxiliary guiding means to said frame (1)
3. The automatic transformer core assembly apparatus according to claim 2, wherein the transformer core automatic assembly apparatus is adapted to be removed from the path of 0). 6. Automatic transformer core assembly apparatus according to claim 1, characterized in that it comprises control and checking means, preferably comprising a computer. 7. capable of supplying necessary input signals to the computer;
7. The automatic transformer core assembly apparatus of claim 6, further comprising an appropriate number of positioning sensors for the various moving elements.