DD132581B1 - METHOD AND ARRANGEMENT FOR TRANSPORT CONTROL OF WORKPIECES - Google Patents

Description

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Arrangement for the transport control of workpieces Field of application of the invention

The invention relates to an arrangement for the transport control of workpieces in highly productive plants, preferably the semiconductor production with an input and an output tray, the workpieces are arranged after runs of a processing cycle in the output tray on workpiece locations that correspond to those in the input tray.

Characteristic дет known technical solutions

There are various forms of transport control of factory t из keη b known.

The DL-WP 93 3I8 describes a device for the control of workpiece transport devices, in which workpieces lie on Werkstücicträgern a support plate. These workpieces are detected by a light scanner and then removed by means of a gripper.

If a workpiece carrier does not carry a workpiece, the next workpiece carrier is automatically approached until a workpiece is detected and processed. The DI, -WP 120 399 describes a control of the pub ρ P of K ^ gozines used in magazine articles. In this invention the Апзслі "Or Hube öec Xagasixiß is automatically determined by бог РІУло of the carrier ₅ Ho in acc ί.ίΐ ^ ε.ζ ± η i.

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Furthermore, solutions are known in which, if the workpieces are to be stored in an output magazine on such work stations, which correspond to those in the input tray, the possible gaps in the input magazine treated as workpieces v / ground, d. H. that no "work piece" is machined in a cycle of the machine, which leads to considerable unproductive times, which are disadvantageous especially in automatic production equipment.

Object of the invention

The object of the invention is to provide an arrangement for the transport control of workpieces, which allows workpieces are removed from a technologically-related gaps having input magazine without idle and stored after processing in a Ausgabemaga-зin the corresponding workpiece locations, so that the identity of the workpiece characterizing position is retained in the magazine. The number of individual processing stations must be variable and necessary magazine changes must have no influence on the processing status.

The invention is based on the object by recognizing and storing the numbers of occupied workpiece spaces of the input magazine in consideration of any gaps between them during the passage of the workpieces through the processing section to control the transfer into the output magazine so that in these the "workpieces on workpiece positions are stored, which correspond to those in the input tray.

In this case, a workpiece must be removed at each transport cycle, so that sie, on each processing station of the processing section is a workpiece.

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Features of the invention

In the arrangement according to the invention, an input magazine is assigned an input counter and an output counter is assigned to the output magazine. The outputs of the input counter are connected to a register block consisting of a corresponding number of shift registers.

Here, the condition 2 ⁿ ^ η with η as the number of workpiece locations in input or output magazine and m as the number of shift registers or as a counter capacity of the input counter and the output counter.

The shift registers have r digits, where r specifies the highest possible number of transport steps in the processing path

 Furthermore, the associated outputs of the shift registers and the output counter are linked in equivalent circuits whose outputs are combined in a first UKD gate whose output is connected to the dynamic input of a bistable multivibrator and an evaluation logic. Their other inputs are the output of an output workpiece probe associated with the last processing station and the output of the bistable multivibrator. Furthermore, the outputs of the evaluation logic are connected to a workpiece output, a drive of the output magazine and a second AND gate.

Finally, an astable multivibrator is connected to the second input of the second UIiD gate. In turn, the output of the second AND gate and the signal of the transport clock is linked to an OR gate whose output is applied as a shift clock to the clock inputs dex shift register.

Furthermore, a zero position of the two counters and the shift register is provided, whereby the zero position can be effected such that the counters and the shift registers rvS are provided with an arbitrary number of 2 ^lTl .

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When the input magazine is scrolled down, the number of workpieces in the input magazine is counted.

When detecting a workpiece in position n. Of the input magazine, the input counter also contains the information П .; ,

By the following machine command of the transport clock, the information n-j_ is stored in the first places of the shift registers

 After a maximum of r transport steps, this workpiece passes from the nth workpiece space of the input magazine to the last processing station. There the output workpiece sensor signals the presence of the workpiece. At the same time the information n ^ reaches the last digits of the shift registers.

Since the output counter is still on the number of workpiece space of the previous workpiece, the equivalence is deleted.

This causes the bistable divultivator to be turned on. The voltage applied to the Auswertelogik signal C of the output of the bistable multivibrator forms with the output of the first AND gate A, the logical function of the output magazine drive B on the third output of the evaluation logic.

D = T AC

After reaching equivalence, i. H. after the necessary magazine stroke number of the output magazine, the output counter is also on n ^ becomes D = C

and there follows the command of the workpiece output E on the second output of the evaluation logic

E = AAC = I

If the workpiece has been dispensed into the dispensing magazine in the correct position ni , the bistable multivibrator is reset by means of the signal B of the output workpiece sensor and a new transport cycle TT is possible because a new workpiece has been detected in the input magazine.

If less than r transport steps are necessary, then the workpiece of the nj_-th workpiece space is already on the last processing station and is recognized by the output workpiece filler, although the information n is still within the shift register and the last digits of the shift register are the information of the previous workpiece has. At the same time there is still the equivalence

A = 1

The signal B results in a signal 3? = A AB, which leaves the pulses AMV of the astable multivibrator through the second UMD gate

 The shift clock ST thus results in

ST = TT V (AIW A (A AB))

and is connected to the clock input of the shift registers. As a result, the pulses AE7 store the current information of the input counter until the information r> - ^ reaches the last digits of the register block. Thereafter, the output message is set to the appropriate workpiece position as described.

When the upper workpiece positions η in the magazines are reached, the magazine is changed and the new one is moved to the first workstation.

The register block need not be reset in this case, but the information of the free Werkstückplätae from the last workpiece of the old magazine to the first workpiece is new magazine is already described benefits.

embodiment

The invention is explained in more detail in an embodiment and with reference to a drawing.

In the exemplary embodiment, magazine input and output via a processing G tr echo 'nit the one-processing stations verbund or .. The workpieces .igabe and tool output

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are provided with drives for the magazine stroke and for removal or input of the workpieces.

Furthermore, the input magazine is assigned an input sensor sensor and the last processing station has an output workpiece sensor. These parts are not shown.

The input magazine is assigned an input counter 1, which counts the workpiece positions in the input magazine as input magazine lifting steps EMS, and whose capacity m is dimensioned such that 2.times.N, where .eta. Is the number of workpiece positions in the input magazine.

The m outputs of the input counter 1 are connected to the inputs of the m shift register 4 of the register block 3. The m outputs of the shift registers 4 are linked to the m outputs of the output counter 1 of the same type of output counter 2 in equivalent circuits 5 whose m outputs form the inputs of a first AND gate б. The output counter counts the output magazine strokes AMS. The output of the first UlTD gate б is applied to the dynamic input of a bistable multivibrator 7 and to an evaluation logic 8.

The signal B of the workpiece output sensor is also applied to the evaluation logic 8 and to the reset input of the bistable multivibrator 7, while the output C of the bistable multivibrator 7 also at the evaluation logil: 8 is applied

 The evaluation logic 8 consists of a first UITD link

12 with an ITegator 15 upstream of the logical function

D = AAC

V70 when D is connected to the drive of the magazine hub of the issue magazine, there is still a second UUD link

13 of the logical function

E = AAC where E is connected to the drive of the workpiece output

and a third UKD link of the logical function

Έ = А Л В where ΐ is connected to a second UITD-Gstier 9.

With dew second TffiD gate 9 is still an astable multivibrator 10, with the output of the TIFD gate 9, an OR gate 11 and rait the output of the GDER-G-atters 11 nine the Takteingrrge the shift register 4 is connected as a shift clock ST. Furthermore, with the second input of the ODIJk gate 11, the signal TT of the transport cycle of the processing path is connected. In addition, a zero position 0 is the counter 1; 2 and the shift register 4 is provided.

Claims (1)

20 0 8 6 Erf ir.dungsan sprue Ii Arrangement for Trsnsportsteuerung of "workpieces from a possibly straddling input tray on a consisting of at least one processing station processing section in a Ausgebemageziru characterized in that the input magazine an input counter (1) and the output magazine an output counter (2) is assigned, that continue the outputs the input counter (1) are connected to a register block (3) consisting of a corresponding number of shift registers (4), further that the associated outputs of the shift registers (4) and the output counter (2) are linked in equivalence circuits (5), their outputs are anusangemaßt in a first ТЛШ gate (6), whose output is connected to the dynamic input of a bistable multivibrator (7) and a Auswertelogik (8) whose other inputs the signal (B) of a Ausgangsewerl-Cstückfühlers, the associated with the last processing station, and the output of the bistable M Ultivibrators (7) -ind, that further the outputs of the Auswertelogik (8) with a workpiece output (E), a drive of the Ausgabemgazines (D) and a second UI-ID gate (9) is connected, that finally the pulses (AKV ) of an astable multivibrator (10) against the second UIiD gate (9) whose output is associated with the signal (TT) of the transport clock in an ODEil gate (11) whose output is applied to the clock inputs of the shift registers (4) , For this 1 page drawings