JPS6049853A - Device for adjusting decelerating position of die clamping for direct pressure type die casting machine - Google Patents

Abstract

PURPOSE:To simplify considerably the operation for adjusting a rod for adjusting the decelerating position conforming to the thickness of dies determined from the displacement of a moving platen in the stage of exchanging the dies by calculating the adequate length of said rod and sliding the rod. CONSTITUTION:The displacement of a moving platen 3 with respect to a stationary plate 1 detected by the 1st linear scale sensor 20 upon completion of mating of upper and lower dies 5, 6 is converted to a die thickness H by the die thickness conversion circuit of a microcomputer 30. The output from said circuit is inputted to an arithmetic circuit for a rod length where the adequate effective length L1 of a rod 13 for adjusting the decelerating position conforming to the thickness H is calculated. On the other hand, the present effective length L2 of the rod 13 in the stage of mating the dies is detected by the 2nd linear scale sensor 23 and is preliminarily stored. The difference between the lengths L1 and L2, i.e., the extent of the movement of the rod 13 necessary for obtaining the length L1 is calculated by the arithmetic circuit. A servocontrol motor 33 is actuated by the operation of a data input device 25 and the effective length of the rod 13 is adjusted to attain the length L1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold clamping deceleration position adjusting device for a direct pressure type die casting machine.

In a typical die-casting machine, the main ram lowers the moving platen to fully align the upper and lower molds attached to the moving platen, while the main ram is provided separately from the main ram to open the mold. The mold is opened by raising the top ff1t using a pull bank cylinder.

In die-casting machines that use this method,
When the moving platen is fully lowered, it is important to control it so that it descends at a relatively high speed until just before the upper and lower molds are brought together, and when the molds are brought together, the two molds are brought together slowly and slowly. The structure shown in FIGS. 1 and 2 is used in this case. In the figure, 1 is a fixed platen, 2 is a main 2m, 3 is a moving platen that is guided by a dieper 4 and moves up and down, 5 is an upper die attached to this moving platen 3, and 6 is attached to a base platen 7. It is a lower type.

Further, 8 is an injection cylinder, and 9 is a pullback cylinder.

The cylinder tube 10 of the pull bank cylinder 9 is attached to the fixed platen 1, while the pull back cylinder F9
A pullback ram 11 inserted into the moving platen 3 is connected to the moving platen 3. Furthermore, the pull bank cylinder 9 is provided with a deceleration position adjusting rod 13 inserted into the casing 12.

A total of 7 oil drainage boats 14 weighing 14 &~14 g are formed in the cylinder tube 10 of the pullback cylinder 9, and when the moving platen 3 is lowered (during mold alignment), the pullback ram 11 moves into the oil drainage boats. By sequentially closing the chambers 14 from the top, the total discharge area of the hydraulic oil discharged from the chamber 15 to the boat 16 gradually becomes smaller. As a result, the descending speed of the moving platen 3 is gradually reduced as it approaches the lower die 6.

Furthermore, by forming a plurality of fine fixed orifices 917 at the tip of the deceleration position adjustment rod 13, more precise deceleration control is possible immediately before the mold fitting of the upper mold 5 to the lower mold 6. That is, in FIG. 2, just before the lower mold 6 and upper mold 5 are brought together, for example, 14 of the oil drain boats 14 &
If ~14d is assumed to be blocked by the pullback ram 11, all the hydraulic oil discharged from the remaining oil drain ports ) 14e~14g passes through the fixed throttle 17 on the deceleration position adjustment rod 13 side and flows to the boat 16 side. Therefore, more fine deceleration control is performed than when the fixed throttle 917 is not used together.

The position where the deceleration effect is generated by the fixed throttle 17 is determined by the deceleration position adjusting rod 1 depending on the mold thickness of the upper and lower molds 5.6.
It can be changed by adjusting the vertical position of 3. That is, the effective dimension when the deceleration position adjustment condom 13 is fully tightened in advance.

If the mold thickness is Hm, then =L+1+
The mold clamping deceleration position by the fixed throttle 17 is adjusted by completely loosening the deceleration position adjustment rod 13 manually until the value (C-H) is reached. Here, C is determined by the type δ
is a constant.

However, in such a conventional mold clamping deceleration position adjustment device, it is necessary to readjust the position of the deceleration position adjustment rod 13 each time when changing molds with different mold thicknesses. This is undesirable because the number of setup steps increases. In particular, if the adjustment is not carried out properly, the deceleration effect of the mold clamping speed will depend almost exclusively on the oil drain boat of the Puruban cylinder, and a large impact will occur when the upper mold and lower mold come together. It turns out.

In view of the above-mentioned points, the present invention has been made with the object of simplifying the adjustment work of the deceleration position adjustment rod.

In the present invention, as shown in FIG. 3, the amount of displacement of the moving platen 3 with respect to the fixed field 1 is detected by the first linear scale sensor 20, and the displacement of the moving platen 3 with respect to the fixed field 1 is detected by the first linear scale sensor 20. On output, the mold thickness is converted into a suitable mold thickness in a mold thickness conversion circuit 21 based on a data table stored in advance.

Then, from the output of the mold thickness conversion circuit 21, a suitable length of the deceleration position adjustment rod 13 corresponding to the mold thickness is calculated in the kelondo length calculation circuit 22.

On the other hand, the actual effective length of the deceleration position adjustment rod 13 is
Detected by the linear scale sensor 23, this w, 2
The difference sound calculation circuit 2 between the value obtained from the linear scale center t-23 and the value obtained by the previous rod length calculation circuit 22.
Calculate in step 4. By inputting the value obtained by this arithmetic circuit 24 as the rod movement amount through, for example, the data input device 25, the deceleration position adjustment rod 13 is slid through the servo control circuit 26 and the servo drive mechanism tank 27. , -f: Adjust the effective length of the rod 13 to 9.

Next, a more specific embodiment of the present invention will be explained based on drawings of a tray. However, the same reference numerals are used throughout for the same parts as in the conventional example described above.

FIG. 4 is a diagram showing an embodiment of the present invention.

As shown in the figure, a first jl=l near scale sensor 2 is disposed as a bridge between the fixed platen 1 and the moving platen 3 via a platen 18, 19'e, and the sensor body 28 is fixed. One end of the two sensor rods is fixed to the panel 1 and to the moving platen 3, respectively. This linear scale sensor +J-20 is connected to the microcomputer 30.1. The microcomputer 30 has a moving platen 3 that corresponds to the fixed platen 1 when the upper mold 5 and the lower mold 6 are tightly matched when exchanging the amount of metal.
The relative displacement amount is detected by the linear scale sensor 20 and inputted.

In addition, a second linear scale sensor 23 is similarly arranged between the deceleration position adjustment rod 13 and the casing 12, with the sensor body 31 on the casing 12 and the sensor rod 32 on the deceleration position adjustment rod 13 side. fixed for each. The effective length formula of the deceleration position adjusting rod 13 is detected by the linear scale Sentsu-23 and input to the microcomputer 30.

33 is a servo motor attached to the casing 12, 34
3 is a worm provided on the output shaft of the servo motor 33;
5 is a worm wheel provided integrally with the deceleration position adjustment rod 13; - The servo drive mechanism 27 comprises a servo drive mechanism 27, and the servo drive M427 has a function for adjusting the effective length of the deceleration position adjustment rod 13 in response to a command from the data input device 25, as will be described later. There is.

Here, the operation of the above-mentioned apparatus will be explained in relation to FIG. 3 as well as a flowchart (FIG. 5) for executing its control.

First, when replacing the mold, use the mode selector switch on the control panel (not shown). Set it to the "mold change" position. and,
After attaching the upper mold 5 and the lower mold 6t to the required positions, two mold alignments are performed using the weight of the upper mold 5. Completion of this mold matching is detected by a limit switch (not shown).

When the mold matching is completed, the amount of displacement of the Moving's Latin 3 detected by the first linear scale 7-Fu 20 is
In the mold thickness conversion circuit 21, the corresponding mold thickness H is converted based on a data table stored in advance, and the display 36
It is visually displayed. In other words, the upper and lower molds 5 installed earlier
, 6 can be indirectly measured from the amount of displacement of the moving latin 3, and the mold thickness dimension H is displayed on the display 36.

Further, the output of the mold thickness conversion circuit 21 can be inputted to the arithmetic circuit 22 in terms of rod length, where the appropriate effective length of the deceleration position adjustment rod 13 commensurate with the mold thickness II is calculated. Here, as shown in FIG. 2, the dimension when the deceleration position adjustment rod 13 is fully tightened is '(L., and the mold thickness determined by the mold thickness conversion circuit 21 is 'kH.' The appropriate length of the deceleration position adjustment rod 13, beam, = L
o+ (C-H) is criticized.

On the other hand, the current effective length 'GLt of the deceleration position adjustment rod 13 at the time of mold matching is determined by the second linear scale sensor 2.
3 and the memory circuit 38 is detected at the same time as the mold matching is completed.
The data of this effective length and the appropriate length previously calculated by the rod length calculation circuit 22 can be input to the calculation circuit 24. Then, the arithmetic circuit 24 calculates the difference -L between ri, t, and t, and the result of the calculation is visually displayed on the display 37. In other words, the appropriate length L+ of the deceleration position adjustment rod 13 commensurate with the mold thickness H
The amount of movement of the rod 13 required to reach the desired position is determined.

Then, by inputting the data permanently displayed on the display 37 by operating the keyboard of the data input device 25, the servo motor 33 is activated, and the deceleration position adjustment rod 13 is moved through the worm 34 and the worm wheel 35. The effective length of the rod 13 can be adjusted to the appropriate length Ll.

The reason why all data for adjusting the deceleration position is manually input by keyboard operations is as follows. In other words, the mode selection switch mentioned above is
When the "Mold change" position is selected, the next mold opening will be performed unless data is manually entered using the keyboard operation described above.
By interlocking so that all operations cannot be performed,
This is to avoid neglecting to adjust the deceleration position FA adjustment roller when replacing the mold.

As is clear from the above description, the present invention has the effect of greatly simplifying the adjustment work of the deceleration position adjustment rod when replacing the mold.1.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a direct pressure type die + cast machine equipped with a Grubac ram cylinder f and a deceleration position adjustment rod, Fig. 2 is an enlarged sectional view of the main part of Fig. 1, and Fig. 3 shows the configuration of the present invention. The block diagram in FIG. 4 is an overall explanatory diagram showing one embodiment of the present invention, and the box diagram in box 5 is a flowchart for executing the control. 1... Fixed board, 3... Moving's Latin, 5...
... Upper die, 6... Lower die, 9... Pullback ram cylinder, 13... Deceleration position adjustment rod, 20... First
linear scale sensor, 21... mold thickness conversion circuit,
22...Rondo long awn calculation circuit, n...Second linear scale sensor, 24...Arithmetic circuit, 25...
Data input device, 26... Length-water control circuit, 27...
・Servo drive mechanism, 30... microcomputer,
33... Servo motor. Figure 1 Figure 2

Claims (1)

[Claims] (1) A direct pressure die-casting machine is equipped with a pullback drum cylinder that makes deceleration control sound during mold matching, and this pullback cylinder is equipped with a deceleration position adjustment rondo that controls fine adjustment of the deceleration control. A first linear scale sensor that detects the entire amount of displacement of the moving platen with respect to the board, a mold thickness conversion circuit that converts the output of the first linear scale sensor to a corresponding mold thickness, and the mold thickness conversion circuit. A rod length calculation circuit that receives the output and calculates the appropriate length of the deceleration position adjustment rod commensurate with the mold thickness, and is attached to the deceleration position adjustment rod,
a second detecting the actual effective length of the deceleration position adjustment rond;
a linear scale set y+j-, an arithmetic circuit that receives the outputs of the rod length arithmetic circuit and the second linear scale sensor and calculates the difference sound between the two rivers, and a deceleration position adjustment rond that receives the output of the arithmetic circuit. Full sliding length - Bo drive 4
A mold clamping deceleration position adjustment device for a rotation pressure type die-casting machine, which is completely characterized by being constructed from the KS 41't.