JPS59225832A - Press die - Google Patents

Abstract

PURPOSE:To enable lamination of planks without inclining the same by mounting freely rotatably and vertically movably dies to a die plate, providing a lifter device which moves upward and downward the dies and a driving device which rotates the dies and positioning the die during descending thereof. CONSTITUTION:Dies 10, 11 are provided on a lower die 8 of a press type die set and the die 11 is mounted freely rotatably and vertically movably in the aperture 10 of a die plate 12. A steel plate 1 is then fed to a direction A and is correctly positioned by using pilot hols 2. The steel plate is blanked 4... stepwise by blanking edges 4a... of the die 10 until finally a plank 6 is blanked by the blanking blade 6a of the die 11. When a prescribed number of the planks 6 are blanked, the die 11 is moved upward by a lifter device 15 and a pin 19 is removed from a positioning hole 20 then the die 11 is rotated at a prescribed angle around the point O by means of a driving device 16 via a rack 17 and a gear 14. The addition of the deviation in the thickness of the steel plate is thus prevented and the lamination of the planks is made possible without inclining the same.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press die that is attached to a press machine and used for shearing.

In general, sheet metal press processing has the advantage that products with accurate dimensions and shapes can be obtained, making it suitable for mass production, and that it is easy to automate processing and does not require a high degree of skill. For this reason, it is widely used in rotating machines that require high machining accuracy, such as machining stator cores of electric motors.

This stator core has conventionally been formed by stacking blanks punched from steel plates using a press die. To explain this punching process, Fig. 1 is a plan view of a steel plate showing the punching process, in which a steel plate (11) formed in a band shape is sent intermittently in the direction of arrow A and punched in stages. The steel plate +11 is positioned accurately by the pilot pin (not shown) that fits into the pilot hole (21), that is, the center of the punch (not shown) and the center line of each punched part.
It is positioned at a position where the line and the intersection of the YY line coincide. When the steel plate (1) is fed sequentially, the punching process proceeds step by step, first to the slot grooves (3) in the stator core, then to the rotor shaft hole (4), and to the rotor blank (5). A stator core blank (6) as shown in FIG. 2 is processed. A stator core is formed by stacking a large number of these stator core blanks (6).

However, in conventional press dies of this type, the steel plates (1) are stacked in large numbers.
If there is a deviation in plate thickness during rolling forming, the laminated stator core (7) will have an error added only on one side, as shown in Figure 3, and the problem will be that the laminated stator core (7) is tilted by Hl-H2. was there.

The present invention has been developed in view of the above circumstances, and has an extremely simple configuration in which the die is attached to the die plate so that it can be rotated and raised or lowered at will, a lifter device and a drive device are provided, and the die is positioned when it is lowered. To provide a press die that can stack blanks without tilting them.

Hereinafter, its configuration and the like will be explained in detail with reference to embodiments shown in the drawings.

FIG. 4 is a plan view showing the press mold according to the present invention. In the same figure, the symbol (8) indicates the lower mold of the press mold die set formed in a rectangular shape. The mold (8) is provided with a protruding guide post (9) for positioning an upper mold (not shown) disposed opposite to the mold (8). (Iol and (Ill) are the first and second dies placed on the lower mold (8) of the press die set, and these dies QOI, (1,]J are arranged so that they extend on the same straight line. The first die 00) is used to punch out the shaft hole (3) of the rotor, the slot groove (4) of the stator core, the nine rotor blanks (5), and the blades (3a) and (4m).
, (5a) are provided at predetermined intervals, and a pilot hole (2a) into which a pilot pin fits is bored.

The second die (11) is formed into a substantially cylindrical shape, as shown in FIG. Opening (1
31, and is installed so that it can rotate freely and move up and down while being guided. A punching knife (6a) for punching the outside of the stator core blank (6) is formed at the upper opening edge of this second die (111), and the outer circumferential edge at the lower end protrudes in the radial direction. A gear (14) is engraved to drive 11j to rotate around point 0. (The first gear is provided through the lower die (8) of the press die set, and the tip is connected to the second die (Ill). A lifter device (16) is provided on the lower die (8) of the press die set and engages with the gear (141).
This is a drive device equipped with a cylinder (LFD) that moves this rack Q7) forward and backward. 01 is a positioning pin protruding from the lower mold (8) of the press die set, and this positioning pin 0!J is the second When the old die J is lowered, it fits into the positioning hole formed in the second die fi13 and positions the second die 01) at a predetermined position.

In the press die constructed in this way, as shown in Fig. 6, the steel plates (1) that are successively fed in the input direction are correctly positioned by the pilot holes (21) and then inserted into the first die (1).
1, step by step punch out the shaft hole (4) of the rotating shaft, the slot groove (3) of the stator core, and the blank (5) for the 2-rotor, and finally punch out the blank (5) for the stator core through the second die 01). blank(
6) can be punched out. Furthermore, if the second die Qll is raised by the lifter device σ1 and the positioning pin 09 is removed from the positioning hole (A), the second die Qll can be rotated around the point O by the drive device 06). can.

Therefore, first, a predetermined number of stator core blanks (6
), the drive device (16) rotates the second die αD by a predetermined angle so that the shape matches the punched stator core blank (6), and at this position, the second die αD is 2
After fitting the die (Ill) to the positioning pin 01 and positioning it accurately, the stator core blank (6) can be punched out.In other words, by rotating the second die 0D, the second The stamped stator core blank (6) supported by the die (11) can be rotated by a predetermined angle relative to the stator core blank (6) to be punched.

In addition, in the above embodiment, the stator core blank (6
), but the present invention is not limited to this, and it goes without saying that it can be applied to press dies that punch out various blanks.

As explained above, according to the present invention, the die is mounted so as to be rotatable and can be raised and lowered, and a lifter device and a drive device are provided.
Since the die is positioned during descent, the blank can be punched out at an accurate position, and by rotating the die, the punched blank can be rotated at a predetermined angle relative to the blank to be punched.

Therefore, since the stacking position of the blanks can be shifted, even if there is a deviation in the thickness of the steel plates, the error in the plate thickness is prevented from being added, and the blanks can be stacked without tilting.

[Brief explanation of drawings]

Fig. 1 is a plan view of a steel plate showing a conventional punching process, Fig. 2 is a plan view showing a blank for a stator core, Fig. 3 is a side view showing a conventional stator core, and Fig. 4 is a plan view of a steel plate according to the present invention. FIG. 5 is a plan view showing such a press die, FIG. 5 is a sectional view taken along the line V-V in FIG. 4, and FIG. 6 is a plan view of a steel plate showing a punching process. (11... steel plate, (ill... second gui, (
121... Die plate, 0ω... Lifter device, (16)... Drive device, (19... Positioning bin. Agent Masuo Oiwa (7) Figure 1 Figure 2 ■ ■ ■ Third area: Procedural amendment (voluntary) 1. Indication of the case Japanese Patent Application No. 58-93690 2. Name of the invention Press type; 3. Relationship with the case of the person making the amendment Address of the patent applicant Tokyo Chiyoda-ku Kuunouchi 2 IT'+2-3
-F'J. Name (601,) Mitsubishi Electric Corporation Representative Kata
111f-2 8 Part 4, Agent (1) Detailed explanation column of the invention in the specification (2) Figure space 6, Contents of amendment (1) [Rotor Punching out the shaft hole (3) --- with a sword (3a), (4a),
(5a) Correct 1 as follows. [Rotor shaft hole (4), stator core slot groove (3)
. Punching out the rotor blank (5) with a drawn knife (4a), (3
a). (5a) J (2) Correct Figure 4 on a separate sheet. that's all

Claims (1)

[Claims] A press mold, characterized in that a die is rotatably and freely mounted on a die plate so as to be freely raised and lowered, and a lifter device for raising and lowering the die and a drive device for rotating the die are provided, and the die is positioned at the time of lowering.