JPH02284852A - Transfer type machine work device - Google Patents

Abstract

PURPOSE:To softly correspond even to an extreme change of production require ment amount by providing a bypass conveying line, which conveys a workpiece finishing work in the first work stage successively to a side of the second work line synchronously with first work line, between first and second work lines. CONSTITUTION:During work in the preceding work stage S2 and the first work stage S3, a lifter 17 is lifted, and a workpiece W, finishing work, is fed to the upper of a lifter 18 by a friction roller conveyer 19, waiting before the next cycle is started in the first work line 10. The workpiece W, when the next cycle is started, is conveyed to a transfer stage S4 by reversely operating a subtransfer device 14, simultaneously operated with a subtransfer device 13, step-feeding each stage S6, S5 on the second work line 11. The workpiece is fed to a side of a friction roller conveyer 4 by the other transfer device 6 simultaneously operated with a transfer device 5, and the work-finished workpiece W is fed back to a side of a main conveying line 1.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a transfer type machine in which two types of workpieces flowing randomly on the same line are machined on a dedicated machining stage depending on the type of the workpieces. related to machining equipment.

BACKGROUND OF THE INVENTION In conventional techniques, for example, in a machining line for cylinder heads of internal combustion engines, two types of cylinder heads having different numbers of cylinders, valve mechanisms, etc. are machined on the same machining line.

Figure 3 shows an example of this. 1 is a main conveyance line composed of a combination of a plurality of flick/yon roller conveyors 2, 3.4 and direct feed type transfer devices 5, 6. A sent,
Two types of B workpieces W are intermittently transported by this main transport line 1.

The transfer bars 7.8 of the transfer devices 5, 6 are capable of reciprocating in the axial direction and are rotatable at the same time, and as shown in FIG. hook and transport one pitch at a time.

Reference numeral 10 indicates a first processing line that is branched from the main transport line 1 and is intended for processing workpieces W of type A, and reference numeral 11 is a first processing line that is branched from the main transport line 1 and is intended for processing workpieces W of type B. The second processing line, S2. is A
, B is a finishing stage configured around a machining unit 12 shared by two types of workpieces W. 1st. One of the second processing lines 10, 11 is selectively operated, and when one is operating, the other processing line is at rest.

Each processing line 10.11 is equipped with a lift-and-carry type sub-transfer device 13 or 14 capable of forward and reverse operation, and a transfer stage shared with the main transfer line 1 is centered around this sub-transfer device 13.14. S1
In addition to S4, a pre-processing stage S or S5, and a subsequent first processing stage S3 or second processing stage SIl are provided. Each processing stage S
,,S3゜S5. Processing units 15 and 16 are provided at S.

Friction roller conveyor 2.34i; l:t.

Friction roller conveyor 2
, 3, the workpiece W is transferred to the transfer stage S,
, S, and is parked therein, and at that time, the type of the workpiece W is specified by a type detection means (not shown).

The workpiece W whose type has been specified in the previous stage of the transfer stage S is once transferred to the transfer stage S8 by the transfer device 5, regardless of the type.

When the workpiece W on the transfer stage S1 is of type B, the sub-transfer device 13 does not operate at all, and the workpiece W waits for the transfer device 5 to operate in the next cycle and is transferred to the friction roller conveyor 3 side. sent.

On the other hand, when the workpiece W on the transfer stage S1 is of type A, the workpiece W is transferred from the transfer stage S1 to the pre-processing stage S, by the normal rotation operation of the sub-transfer device 13.
The material is further transported sequentially from the pre-processing stage St to the first processing stage S, and required machining such as poling is performed at each stage S, . Further, the workpiece W that has been processed in the processing stage S3 is again transported to the transfer stage S via the preprocessing stage St by the reverse operation of the subtransfer device 13, and the workpiece W is transferred from the friction roller conveyor 2. When the next workpiece W is loaded onto the mounting stage S1, it is sent to the friction roller conveyor 3 side by the transfer device 5.

Then, since the processed workpieces W of type A and the unprocessed type B workpieces W are randomly input to the friction roller conveyor 3 side, the same procedure as above is carried out in the second processing line 11. Processing of workpiece W of type B is then performed.

Problems to be Solved by the Invention In the conventional machining apparatus as described above, the first machining line 10 and the second machining line 11 are operated selectively depending on the type of workpiece W, Moreover, the workpiece W that has been processed on the processing line 10.11 is transferred to the processing line 10.11. Sub-transfer device 1 which is the center of II
Since the next workpiece W cannot be introduced unless it is returned to the main conveyance line 1 side by the reverse operation of step 3 or 14, when the production m of workpieces W of type A and the production amount of workpieces W of type B are balanced, Although this is not a particular problem, it becomes a problem when the proportion of work W of type A to the total production volume increases extremely.

In other words, even if the proportion of workpieces W of type A increases dramatically, as long as the processed workpieces W are returned to the main transport inlet side by the reverse operation of the transfer device 13, the cycle time will still be the same as before. As a result, it will not be possible to meet the production demands for workpieces W of type A.

The present invention was made in view of the above problems.
The purpose is to provide a transfer-type machining device that can flexibly respond even when the production volume of one of the workpieces increases dramatically.

Means for Solving the Problems As described above, the present invention is a transfer-type machining device that machining two types of workpieces that flow randomly on the same line. , a branch is formed in the middle of the main transport line, and one type of workpiece is transported from the main transport line to the first processing stage, and the workpiece that has been processed in the first processing stage is transferred to the main transport line. A first machining line equipped with a conveying means capable of forward and reverse operation to return the workpiece, and a main conveyance line that is branched from the downstream side of the branch of the first machining line, and carries the other workpiece to the main conveyance line. a second processing line equipped with a transport means capable of forward and reverse operation for transporting workpieces from the first processing stage to the second processing stage and returning the workpieces processed at the second processing stage to the main transport line; It is arranged between the machining line and the second machining line, and the workpieces that have been machined in the first machining stage are sequentially transferred to the machining line side of cylinder 2 in synchronization with the machining cycle of the first machining line. It is characterized by being equipped with a bypass conveyance line for conveyance.

According to this structure, for example, when the main focus is on processing only the above-mentioned type A workpiece, the workpiece that has been processed on the first processing line can be transferred without using the conveyance means of the first processing line ( It is transported to the second processing line using the bypass transport line, and returned to the main transport line side using the transport means of this second processing line.As a result, the processing is carried out using the transport means of the first processing line. Cycle time can be shortened by the time required to return finished workpieces to the main transport line.

Embodiment FIG. 1 is a diagram showing an embodiment of the present invention, and parts common to FIG. 3 are given the same reference numerals.

In this embodiment, as shown in FIG.
．． Lifters 17.18 are provided at the rear of the So, and a friction roller conveyor 19 as a bypass conveyance line is provided between each lifter 17.18 to interconnect the first and second processing lines 10.11. It is.

A drive-type roller conveyor is mounted on each lifter 17 and 18, and the lifter 17 has the function of sending the workpiece W picked up by the lifter 17 to the 7-reaction roller conveyor 19 side. On the other hand, the other lifter 18 has a function of sending the workpiece W picked up by the lifter 18 to the processing stage Sll side of the second processing line 11.

In the machining device configured in this way, when the production amount of workpieces W of type A and the production amount of workpieces W of type B are almost balanced, the lifters 17 and 18 and the friction roller conveyor 19 are After the machine is stopped, each workpiece W is processed in the same manner as before.

On the other hand, when the production amount of workpieces W of type A increases significantly, processing is performed by switching to a bypass conveyance line method using a friction roller conveyor 19.

That is, as shown in FIG. 2, the first processing line 10
When the machining of the workpiece W at the machining stage S is completed,
The sub-transfer device 13 is operated in the normal direction without being operated in the reverse direction, and the processed workpiece W is transferred to the lifter 17.
Transport it to above.

At the same time, the workpiece W waiting in advance on the transfer stage S
is transferred to the pre-processing stage S, and the work W in the pre-processing stage S is sequentially transferred to the first processing stage S3, and preliminary work such as workpiece clamping is performed in the pre-processing stage S and the first processing stage S. After that, processing can proceed. Also, waiting for the sub-transfer device 13 to return,
The transfer device 5 transports the next workpiece clamp W from the friction roller conveyor 2 to the transfer stage S1 and waits.

As described above, the lifter 17 moves upward while processing is being performed in the pre-processing stage S and the first processing stage S, and the processed work W on the lifter 17 is transferred to the lifter 18 by the friction roller conveyor 19. and waits until the next cycle in the first processing line 10 starts. Then, the work W on the lifter 18 is transferred to each stage S8 on the second processing line 11 by the reverse operation of the sub-transfer device 14 which operates simultaneously with the sub-transfer device 13 at the start of the next cycle.
．． S, is step-fed and transported to the transfer stage S4. Then, the work W transferred to the transfer stage S4 is transferred to the friction roller conveyor 4 by the other transfer device 6 which operates simultaneously with the transfer device 5.
At this point, the processed type A workpiece W is returned to the main conveyance line 1 side.

In other words, while the next type A workpiece W is being processed on the first processing line 10, the processed workpiece W is simultaneously transferred to the transfer stage via the friction roller conveyor 19 and the second processing line 11. Therefore, compared to the case where the workpiece W that has been processed in the processing stage S3 of the first processing line 10 is returned to the transfer stage SI of the first processing line 10 each time, Cycle time can be significantly reduced.

In addition, in the bypass conveyance line method that focuses only on machining workpieces W of type A as described above, if a very small number of workpieces W of type B come flowing, the first machining line 10 is stopped. Then, the work W of type B is processed using the second processing line 11 as in the conventional case.

Effects of the Invention As described above, according to the present invention, when the production volume of one of two types of workpieces increases extremely, the processing line for the other workpiece can be used as part of the bypass conveyance line. Since processing can be performed, the cycle time can be significantly shortened when only processing workpieces whose production volume has increased, and it has the advantage of being able to respond flexibly to extreme changes in production requirements.

[Brief explanation of drawings]

FIG. 1 is an explanatory plan view showing an embodiment of the present invention, FIG. 2 is a time chart for explaining the operation of the machining device shown in FIG. 1, and FIG. 3 is an explanatory plan view of a conventional transfer type machining device. FIG. 4 is a side view of the transfer device of FIG. 3. l...Main transfer line, 5.6...Transfer device, IO...First processing line, 11...Second processing line, 13.14...Sub transfer device as a transfer means , 17.18-...lifter 19...
・Friction roller conveyor as a bypass conveyance line, S,, S4...Transfer stage, S! ＋S
S: pre-processing stage, S, l: first processing stage, S6: second processing stage, W: workpiece.

Claims (1)

[Claims] (1) In transfer-type machining equipment that machining two types of workpieces that flow randomly on the same line, there is a main transport line that transports the workpieces intermittently, and a line that branches off from the middle of the main transport line, and It is equipped with a transport means capable of forward and reverse operation for transporting either type of workpiece from the main transport line to the first processing stage and for returning the workpiece that has been processed in the first processing stage to the main transport line. A first processing line and a main transport line are branched from the downstream side of the branch part of the first processing line, and transport the other workpiece from the main transport line to the second processing stage. A second processing line equipped with a transport means capable of forward and reverse operation for returning the workpieces processed in the second processing stage to the main transport line, and between the first processing line and the second processing line. a bypass conveyance line disposed in the first machining stage, which sequentially conveys the workpiece that has been processed in the first machining stage to the second machining line side in synchronization with the machining cycle of the first machining line; Characteristic transfer type machining equipment.