JPS5899706A - Centering method in drawing and twisting molding machine - Google Patents

Abstract

PURPOSE:To perform the centering accurately in a short time without skill, by performing the centering of a punch of a retaining ring by using a punch center measuring device having a displacement sensor attaching ring. CONSTITUTION:The attaching ring 41 for the displacement sensors 42a-42d is provided, and its outer diamter is made to equal to the outer diameter of the retaining ring to be centered. The displacement sensors 42a-42d are fixed so that they are symmetrical with respect to the center of the attaching ring 41, and they are spaced at 90 deg. one another. Amplifiers 43a-43d are provided in correspondence with the sensors 42a-42d, respectively. In an subtracting circuit 44, subtraction between the outputs of the amplifiers 43a and 43b and subtraction between the outputs of the amplifiers 43c and 43d are performed. The output of the subtracting circuit 44 is inputted to a microcomputer 46 through an AD converter 45, and the computed result is outputted to a printer 47.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for aligning a drawing sheath forming machine, and more particularly, to a method for recalibrating a drawing sheath forming machine;
Re-calibration sheath retaining ring for winter, which aligns the sheath and the finger for punching the ironed molded product with the punch.
This invention relates to a method for aligning an ironing die holding ring and a finger holding ring to a punch.

- A drawing and ironing machine used to form drawn and ironed can bodies used for beer cans, carbonated beverage cans, etc. (the thickness of the body wall is usually about 0.10 to 0.15 mm), etc. The clearance between the die, especially the final die, and the punch is very small, about 0.10 to 0.1-5 m. Therefore, the alignment of the two is extremely important, and even a slight deviation from the alignment tends to cause uneven thickness on the wall of the can body or damage to the can body.

By the way, the ram that attaches the punch is usually long and thin (for example, diameter 50cm, length 1.3!5m) and reciprocates in the horizontal direction, so even if a special bearing with measures to prevent vibration is used,
Especially for high-speed movements (e.g. 200 strokes per minute),
Slight swing of the punch and misalignment of the center with respect to the center in a stationary state cannot be avoided. Therefore, in the past, the alignment of the die and punch was done by moving the punch at a predetermined speed and listening to the sound of collision between the punch and die to check for contact between the punch and die, or by injecting quick-drying ink onto the inner circumferential surface of the die. The coating was applied in advance, and the coating was judged based on the state of peeling. Therefore, it takes a lot of time and a high degree of skill to remove the hot can body from the punch.If the punch is not aligned correctly, the fingers on the eccentric side must be Excessive frictional force acts on the claws, accelerating wear and shortening the lifespan of the fins.In particular, if the eccentricity is excessive, there may be insufficient contact between the fingers and the open end of the can body. However, there is a problem in that the can body is not removed from the punch and returns to the die section, which tends to damage the die. However, conventional alignment methods rely on skill;
It wasn't always satisfying.

It is an object of the present invention to solve the problems of the prior art described above.

In order to achieve the above object, the present invention provides a holding ring such as a recalibration die holding ring, an ironing die holding ring, and a finger holding ring for extracting ironed compacts in a drawing and ironing machine, and includes a displacement sensor and a displacement sensor mounting ring. A method of aligning the punch using a punch center measuring device, the displacement sensor mounting having an outer diameter equal to the outer diameter of the retaining ring fixes the ring to the support of the retaining ring and aligns the punch center. Using a measuring device, find the center of the punch, adjust the position of the support so that the center of the displacement sensor mounting ring matches the center of the punch, and then fix the retaining ring to the support. The present invention provides an alignment method characterized by the following.

The present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 is a dice set,
Recalibration die 2, recalibration die holding ring 3, first ironing die 4, first ironing die 5, first ironing die holding ring 6, second spacer 7, second ironing die 8, second ironing die holding Ring 9, third spacer 10, third ironing die 11, and third ironing die holding ring 12
He has become the lord. 13 Stritz j- for removing the body of a ladder can, with a plurality of fingers r-14
, ``An annular spring for bringing the claw portion 14a of the finger 14 into close contact with the punch 34 during extraction. 15, a buffer O-ring 516, and a finger retaining ring 17. Reference numeral 18 denotes a case for housing the strip e-13, which is an annular piston housed in an annular cylinder 22 in the nozzle plate 21 of the die set 1, and a conduit (not shown) passing through the guide hole 23. The die set 1 is pressed against the case 18 by the pressurized air supplied through the casing 18, and the die set 1 is fastened.

2. As shown in FIG. The lid 26 is supported at three points in the closed state by the horizontal leaf spring 27 fixed to the lower surface of the lid 26 placed on the block 25 and hinged to the housing 1-9 and the r-gear block 25. . In the example shown in FIG. 3, the angle θ between the line connecting the contact point a of each gouge block 25 and the retaining ring to the center 0 of the retaining ring and the vertical line is set to 45 degrees. The height of the gouge blocks 25 is adjusted by shims 28, and the shims 28 and the r-ge blocks 25 are fixed to the rails 24 by builds 29. As shown in FIGS. 1 and 2, the finger retaining ring 17 is also placed on the two r-ge blocks 30 and is tightened at the top with a screw 131! Supported by 13 points. The height of the gage block 30 is adjusted by shims 32 and the height of the gage block 30 is adjusted by shims 32.
The shim 32 is fixed to the case 18 by a delt 33. In the example shown in FIG. 1, the angle θ between the contact point of each gauge block 30 and the finger retaining ring 17, the line connecting the center O' of the finger retaining ring 17, and the vertical line is θ.
' is also set at 45 degrees.

34 is a punch, which is fixed to a ram (not shown);
The punch 34 is reciprocated in the horizontal direction via a ram or by a lance mechanism (not shown).

FIG. 4 shows the configuration of the center measuring device 40 of the punch 34. 41 is a displacement sensor (eddy current type) that measures the distance between the opposing surface portions of the punches 34;

Measurement accuracy 1 μm) 42a.

, 42b p-42c and 42d are attached by rings, the outer diameter of which is equal to the outer diameter of the retaining ring to be aligned (within ±5 μm). Displacement sensor 4
Both of the displacement sensors 2a and 42b1 and the displacement sensors 42c and 42d are centrally symmetrically fixed to the mounting ring 41, and the displacement sensors are arranged at 90 degree intervals. 43a, 43
b, 43c and 43d are amplifiers, 44 is a subtraction circuit, and 045 is an A-D conversion circuit which performs subtraction between the outputs of amplifiers 43a and 43b, and subtraction between the outputs of amplifiers 43c and 43d. The output is input to the micro convenience store 46. Data calculated by the microcomputer 46 is output to a Zolinter (or display) 47.

Alignment of a particular retaining ring, for example the third ironing die retaining ring 12, is carried out as follows @ tip lid 26
, release the pressurized air in the annular cylinder 22, and press the annular piston 20 to machine the die set 2.1°□hcz 4
M o1 Luha. Yaoi.

Next, the displacement sensor mounting ring 41, which has the same outer diameter and approximately the same thickness as the retaining ring 12, is mounted so that the adjacent displacement sensors 42a and 42d are diagonally aligned with each other in the center of each cage block 25. After placing it on the r-gear block 25 and tightening it with the annular piston 20, the lid 26 is closed and the punch 4 is reciprocated at a predetermined speed, and the punch center measuring device 40 is turned on.

indicates the value of By performing the above-mentioned subtraction process, a slight difference in the diameter of the punch 34 in the axial direction (the inner diameter of the body of a can such as a soda can is usually slightly smaller at the bottom of the body and near the opening end) can be calculated. , Sakunachitaru) will be compensated. For example, data is sampled every 2ms at 450
This data is processed by the microcoipulator 46 to take into account the average center-to-punch deflection of the punch 34). The average center and the installation match the center of the ring 41 +rr/, ii
[Mo&k” sri-f'Q + im the breath to J9
The printer 47 can output the s sauce. Based on the adjustment amount output above, adjust the height of each gauge protrusion 25 using the shim 28, and install the ring 41.
is aligned with the punch 34. Next, the attachment is fixed by removing and holding the ring 41. Hall 3 Shidoki Dice Holding Rin?
Since the alignment of the third ironing die 12 and the third ironing die 11 can be performed accurately during manufacture, the ironing die and the punch 34 can be aligned accurately.

The same applies to the re-drawing die °''2.

The alignment of the finger wire holding ring 17 is also done using the holding 1 non-17
．． The parts other than the plate in which the attachment ring 41 is removed and fixed using the delts 50 and screws 31 are the same as described above. In the above example, the position of the retaining ring was adjusted using Gage Pro, tucks and shims. This position adjustment is described, for example, in U.S. Pat. No. 3.7.35,628.
It is also possible to do this with only screws, as disclosed in No. 14H.

However, in the case of the screw type, it is difficult to stably make fine adjustments using the screw, and there are problems such as a decrease in adjustment accuracy due to scratches on the surface of the retaining ring that comes into contact with the screw. It is preferable to use the shim method, which does not have such problems.

According to the present invention, since the retaining rings such as the recalibration die retaining ring, the ironing die retaining ring, and the finger retaining ring are aligned with respect to the punch using a displacement device, even if there is some wobbling in the punch, However, it is possible to accurately perform f1 in a short period of time without requiring any skill, and therefore, it is possible to align the re-drawing die, ironing die, and Fissiger punch with ease and accuracy. This has the effect of preventing troubles caused by the deviation of the key R (4).

Fig. 1 is a side view on the exit side of a die section and part of a stripper of an example of a drawing and sheathing forming machine to which the present invention is applied;
The figure is a longitudinal cross-sectional view taken along the line ■-■ in Fig. 1, Fig. 3 is a longitudinal cross-sectional view taken along the line ■-■ in Fig. 2, and Fig. 4 is a punch center measuring device used in carrying out the present invention. FIG. 2 is a block diagram showing the configuration of an example.

3... Re-calibration die holding ring, 6... First ironing die holding ring, 9... Second ironing die holding ring, 12... Third ironing die holding ring, 25...
・Gooji block (support), 28...Shim, 3゜...Gooji block (support), 32...Shim, 3
4... Punch 45. O... Punch center measuring device, 41... Displacement sensor installation is a ring, 4, Z a
e 42 b-42c +42d...Displacement sensor.

Claims (3)

[Claims] (1) Measurement of a holding ring such as a recalibration die holding ring, a drawing die holding ring, and a finger holding ring for drawing out the ironed compact in a drawing-shidoki forming machine using a punch center equipped with a displacement sensor and a displacement sensor mounting ring. This is a method of aligning the punch using a mechanical tool, and the displacement sensor plate having an outer diameter equal to the outer diameter of the retaining ring is fixed to the support of the retaining ring, and the punch is centered on the punch. Using a measuring device to find the center of the punch, adjust the position of the support so that the center of the displacement sensor mounting ring matches the center of the punch, and then attach the retaining ring to the support. An alignment method characterized by fixing. (2) The punch center measuring device has two pairs of displacement sensors installed symmetrically to the center of the & position sensor, and subtracts one detected value from the pair of displacement sensors located symmetrically to the center. The alignment method according to claim 1, comprising a circuit. (3) The alignment method according to claim 1, wherein the support is an r-di block, and the position of the support is adjusted by a shim inserted under the goo-di block. pa