JP3347416B2 - Press working method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press working method, and more particularly, to a press working method for continuously working while successively transporting a work composed of panel members in a plurality of steps including drawing as a first step. Things.

[0002]

2. Description of the Related Art In general, when a panel component for an automobile is manufactured by press working, a work composed of a panel member is sequentially conveyed in a plurality of steps (for example, a trimming step, a flange step, etc.) in which drawing is the first step. (See, for example, Japanese Patent Application Laid-Open No. 2-207929).

FIG. 8 shows a basic structure in a multi-step press working method.

That is, five upper and lower dies A ₁ , B _{1 to} A ₅ , B ₅ are arranged in a line, and these dies A ₁ B ₁ to A ₅ are arranged.
A _5, B ₅ by the first step S ₁ (i.e., drawing) fifth from
Processing up to step S ₂ (that is, wrist life processing) is to be sequentially performed on the work W. And
The work W processed in the first step S _{1 to} the fifth step S ₅ is transferred to a transfer device (in the illustrated case, a cross bar C _1).
It has become to be sequentially transported to the next process by ~C only ₅ are shown). Reference numeral 1 denotes a press slide for moving the upper dies A ₁ and A ₂ up and down, 2 denotes a second press slide for moving the upper dies A _{3 to} A ₅ up and down, 3 denotes a blank holder in the lower die A ₁ , and 4 denotes a blank holder. Cushion pins for supporting the blank holder 3 with respect to a die cushion device (not shown);
Is a truck for mold exchange.

[0005]

By the way, in the above-described multi-step press working method, when the working of a predetermined lot of a certain panel part is completed, the mold is replaced to process another panel part. It is to be done.

[0006] In this case, even after the last machining of a workpiece prior to a predetermined number of lots completed in the first step S ₁ is finished second
Processing up to step S ₂ ~ fifth step S ₅ is continued. At this time, since the first step S ₁ has a not be carried workpiece, as shown in FIG. 9, so that the on the lower die B ₁ in the first step S ₁ is not present work. Therefore, in the first step S ₁ , the upper mold A ₁ hits the lower mold B ₁ four times until the last work W is processed in the fifth step S ₅ . .

[0007] However, the lower mold in the first step S ₁ B ₁
Since foreign matters such as squeeze chips and cuttings often exist around the periphery, these foreign matters are removed by the lower mold B ₁ during blanking.
Will adhere to the shape surface. Then, when the mold is replaced, the foreign matter remains between the upper and lower molds A ₁ and B _1. If the foreign matter is not wiped off when the mold is used again, the foreign matter of the mold during the press working is removed. This causes rust, which leads to a decrease in product quality. Thus, at present, foreign matter is wiped every time a new mold is set up. However, there is a problem that a loss is increased in operation and a time loss is caused, thereby lowering the operation rate.

Also, when the mold is replaced, the first step S _{1 is performed.}
Must the upper die A ₁ is ineffective once to load the order nothing is on the lower die B _1, automatically workpiece W in. Therefore, at present has been decided to carry a work by hand to the first step S ₁ after the mold setup, there is a problem that the workability is deteriorated.

The present invention has been made in view of the above points, and is directed to a first step (ie, a first step) in a multi-step press working method.
It is an object of the present invention to prevent foreign matter such as drawn scum and chips from intervening between the molds when the molds are exchanged in the drawing process.

[0010]

According to the present invention, as a means for solving the above-mentioned problems, a workpiece made of a panel member is continuously processed by sequentially performing a plurality of steps including drawing as a first step. In the press working method, a new work is carried into the first process after the last work in a predetermined number of working lots has been processed in the first process, and until the last work is completed. The processing work in the first step is not transported, and after the processing of the last work is completed, the mold is replaced while the processing work is sandwiched between the upper and lower dies in the first step.

[0011]

According to the present invention, the following effects can be obtained by the above means.

That is, after the last work in a predetermined number of processing lots has been processed in the first step, one new work is carried in to the first step, and the transfer of the work to the next step is completed. Since the work is not performed until the work is completed, the work is interposed between the upper and lower molds in the first process until the work of the last work is completed and the mold is set up. Adhesion of foreign matter to the mold surface due to the blanking in the first step, which has occurred in the method, is almost completely prevented. In addition, after the machining of the last work is completed, the mold is exchanged in a state where the work is sandwiched between the upper and lower molds in the first process. Since the workpiece already exists, the blanking after the die setup is also avoided.

[0013]

According to the present invention, there is provided a press working method in which a work composed of panel members is continuously worked in a plurality of steps, in which drawing work is a first step, while the work is continuously carried out. After the first work is processed in the first step, one new work is carried into the first step, and the processed work in the first step is not transported until the last work is completed. After the completion of the machining of the last work, the mold is exchanged in a state where the machined work is sandwiched between the upper and lower molds in the first process, so that the first process is performed until the machining of the last work is completed and at the time of mold setup. The work is interposed between the upper and lower molds, so that foreign matter adheres almost completely to the mold surface due to the blanking that occurred in the conventional method. Will be prevented, there is an excellent effect that the foreign matter to prevent foreign matter bite wipe operation can prevent a reduction in operating rate becomes unnecessary.

Further, after the completion of the machining of the last work, the mold is exchanged in a state where the work is sandwiched between the upper and lower molds in the first step. Since the work already exists between the molds, it is not necessary to manually input the work in order to avoid the blanking in the first step after the mold setup, which has an effect of greatly contributing to the improvement of the workability.

[0015]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

The multi-step press device used in the press working method of the present embodiment is also the same as that described in the section of the prior art, and as shown in FIG.
_1, B ₁ to A _5, B ₅ and is configured to have linearly arranged, these molds A ₁ B ₁ to A _5, B by ₅ first step S ₁ (i.e.,
The processing from the drawing processing) to the fifth step S ₂ (that is, the wrist life processing) is to be sequentially performed on the work W.

The work W processed in the first to fifth steps S _{1 to} S ₅ is transferred to a transfer device T (only cross bars C _{1 to} C ₅ are shown in the figure). Is to be sequentially conveyed to the next process. Reference numeral 1 denotes a first press slide for moving the upper dies A ₁ and A ₂ up and down, 2 denotes a second press slide for moving the upper dies A _{3 to} A ₅ up and down, 3 denotes a blank holder in the lower mold A ₁ , Reference numeral 4 denotes a cushion pin for supporting the blank holder 3 with respect to a die cushion device 6 described later, and reference numeral 5 denotes a carriage for exchanging a mold.

As shown in FIG. 7, the transfer device T includes a pair of guide rails 11 extending above the lower dies B _{1 to} B _{5 in} the direction in which the dies are arranged. Is moved horizontally, and the crossbar C _1-
C ₅ (Note that FIG. 7 shows only the crossbars C ₁ and C ₂ )
Pairs of carriages D ₁ , D ₁ each of which can be vertically moved.
To D _5, D ₅ (Incidentally, it is shown only child carriage D _1, D ₂ in FIG. 4) and is horizontally moved along the guide rails 11, 11, connected to the slave carriage D ₁ to D ₅ parent truck D ₀ which is connected via a rod 12, 12 is configured by a drive mechanism 13 for vertically moving the guide rail 11, 11 together is horizontally driven parent truck D _0. A short sub-guide rail 14 is attached to the lower end of one of the guide rails 11, 11 at a position corresponding to the _first step S1, and the sub-guide rail 13 has a workpiece W before processing.
The loader 15 for carrying in is horizontally movably supported.

The drive mechanism 13 includes a press slide 1,
A first power transmission means 16 for converting the vertical movement of the second motor into rotational movement about a horizontal axis, and a second power transmission for converting the output from the first power transmission means 16 into a rotational movement about a vertical axis. Means 17, a third power transmission means 18 for converting the output of the second power transmission means 17 into a rotational movement about a horizontal axis, and a gear for transmitting the output of the third power transmission means 18 to the camshaft 19. A mechanism 20, cams 21 and 22 for horizontal movement and vertical movement pivotally mounted on the cam shaft 19,
1 and 22, a horizontal movement arm 23 and a vertical movement link mechanism 24, and the horizontal movement arm 23
And it is configured to vertically moving link mechanism 24 by a connecting rod 25, 26 connected to the parent truck D _0.

The horizontal movement arm 23 is provided with a link mechanism 27 for horizontally moving the loader 15.

In this embodiment, the connection between the first power transmission means 16 and the second power transmission means 17 is released, and the coupling between the two power transmission means 16 and 17 is released.
Is connected to the drive shaft of the motor 28. Reference numerals 30 and 31 are horizontal movement arms 2
Reference numeral 3 denotes a cylinder for pressing the vertical movement link mechanism 24 against the cams 21 and 22, and reference numeral 32 denotes a torque balance cylinder.

In the above configuration, the press thrusts 1, 2
Of the first, second and third power transmission means 16,
The rotation is transmitted as rotation of the camshaft 19 via the camshafts 19 and 18, and the rotation of the cams 21 and 22 accompanying the rotation of the camshaft 19 causes the arm 23 for horizontal movement and the link mechanism 2 for vertical movement
4 by operating the guide rail 11 together with the moved horizontally along the parent truck D ₀ to the guide rail 11
And crossbars C _{1 to} C ₅
Is moved as shown by the arrow M. In the case of this embodiment, the loader 15 also the crossbar C ₁ ~
It is moved in the horizontal direction and the vertical direction in conjunction with the C _5.

The die cushion device 6 is shown in FIG.
As shown in FIG. 7, a first gas cylinder 61 for elastically supporting the cushion pin 4 and a second gas cylinder 62 having a piston 63 interlocked with the expansion and contraction of the first gas cylinder 61.
And a hydraulic chamber 65 for locking the operation of the piston rod 64 of the piston 63. The piston rod 64 is locked by the supply of hydraulic pressure to the hydraulic chamber 65, and the first and second gas cylinders 61,
62 is to be disabled. Note that, when the hydraulic pressure is not supplied to the hydraulic chamber 65, the first and second gas cylinders 61 and 62 function as gas dampers, which are essential functions.

Next, a description will be given of a press working method using the press machine configured as described above.

In a normal press working, as shown in FIG. 1, a work W carried in by a loader 15 is processed in each of a first step S ₁ to a fifth step S ₅ as in the prior art. It becomes the desired pressed part. At this time, the die cushion device 6 is in an unlocked state, and the blank holder 3 is in an ascending state by the pushing force of the die cushion device 6.

[0026] However, after the last of the work W at a predetermined processing lot number is processed in a first step S _1, as shown in FIG. 2, newly in the first step S ₁ 1
Like the 'carries the said end of the workpiece W is machined workpiece W between the first step S ₁ to complete processing' workpiece W so that do not carry.

[0027] Here, during the first processing for the new workpiece W 'that has been carried into the first step S ₁ (i.e., upper die A ₁
At the time of the first descent operation), the die cushion device 6
The hydraulic pressure is supplied to the hydraulic chamber 65 at
4 was a locked state, by forming a state in which the upper die A ₁ can not rise in the first gas cylinder 61 also increases,
Stop the increase of the blank holder 3 in the lower mold B _1, has a workpiece W 'to form the lower than unloading position P by the cross bar C _1. Therefore, as shown in FIG. 3, the work W of the second step S _{1 to} the fifth step S ₅ is respectively conveyed to the next step, but the work W ′ of the first step S ₁ is not conveyed and so that the is left on the mold B _1.

The press working to the processing of the fifth step S ₅ for the last workpiece W while continuing the locked state of the piston rod 64 mentioned above is completed is performed.

Accordingly, as in the prior art, the blanking is not performed in the first step S ₁ until the processing of the last work W is completed, so that the drawing residue and the cutting powder are formed on the lower mold A _1. No foreign matter adheres.

When the processing of the last work W is completed, the molds are exchanged. As shown in FIG. 4, the molds are exchanged between the upper and lower molds A ₁ , B _{1 to} A ₅ , B. It is performed with ₅ superimposed. At this time, the hydraulic pressure is released from the hydraulic chamber 65 in the die cushion device 6, and the first and second gas cylinders 61 and 62 are unlocked.

Therefore, when the mold is used again, the work W 'is interposed between the upper and lower molds A ₁ and B ₁ in the first step S ₁ , and the first step after the mold setup is performed. must be turned by hand work in order to avoid ineffective at S ₁ is eliminated.

[0032] In the case of this embodiment, as shown in FIG. 5, the workpiece W on the lower die B ₁ in the already first step S ₁ when die replacement 'due to the presence of, the workpiece W' Second
It must be done conveying in the step S ₂ and the loading of the workpiece W to the first step S _1, at this time, the transfer device T
The clutch means 29 by switching operation switched to the power transmission path from the press slide system to the motor system, by operating only the crossbar C ₁ -C _5, as shown in FIG. 6 in,
The first step S carrying the workpiece W to ₁ and the first step S ₁ from the second
Process and transport of the workpiece W 'to S ₂ is performed.

As described above, according to the present embodiment, the last workpiece W in the predetermined number of processing lots is changed to the first step S _1.
First step 'carries the said end of the workpiece W is machined workpiece W between the first step S ₁ to complete processing' new single workpiece W to S ₁ does not carry after being processed in After completion of the machining of the last work W, the mold exchange is performed in a state where the work W 'is sandwiched between the upper and lower molds A ₁ and B ₁ in the first step S ₁ , and No. 1 until machining is completed and during mold setup
Since the workpiece W 'is interposed between the upper and lower dies A ₁ and B _{1 in the} step S _1, the workpiece W' is formed on the surface of the dies by the blanking which occurs in the conventional method. becomes the adhesion of foreign matter is almost completely prevented, with a decrease in the operating rate foreign matter wiping operation becomes unnecessary for preventing foreign matter bite can be prevented, and below the first step S ₁ after the mold setup already it will be present a work W 'between the mold a _1, B _1, the first step after the die setup S ₁
This eliminates the need for manually inputting a work in order to avoid a blank hit in the work, which greatly contributes to improvement of workability.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a state during normal press working in a press working apparatus used in a press working method of the present invention.

FIG. 2 is a schematic configuration diagram showing a state in which the last work of a predetermined number of processing lots has been processed in a second step in a press working apparatus used in the press working method of the present invention.

FIG. 3 is a schematic configuration diagram showing a state where the last work of a predetermined number of processing lots has been processed in a third step in a press processing apparatus used in the press processing method of the present invention.

FIG. 4 is a schematic configuration diagram showing a state when a die is replaced in a press working apparatus used in the press working method of the present invention.

FIG. 5 is a schematic configuration diagram showing a state after a mold setup in a press working apparatus used in the press working method of the present invention.

FIG. 6 is a schematic configuration diagram showing a work loading state after a die setup in a press working apparatus used in the press working method of the present invention.

FIG. 7 is a perspective view of a transfer device in a press working device used in the press working method of the present invention.

FIG. 8 is a schematic configuration diagram showing a normal working state in a press working device used in a conventional press working method.

FIG. 9 is a schematic configuration diagram showing a state after the last work of a predetermined number of processing lots has been processed in a first step in a press processing apparatus used in a conventional press processing method.

[Explanation of symbols]

1, 2 is a press slide, 3 is a blank holder, 4 is a cushion pin, 5 is a trolley, 6 is a die cushion device,
A ₁ to A ₅ is the upper die, B ₁ .about.B ₅ is a lower mold, C ₁ -C ₅ crossbar, S ₁ to S ₅ are first to fifth steps, W, W 'is a work.

Claims (1)

(57) [Claims] 1. A press working method for continuously working while successively transporting works made of panel members by a plurality of steps in which drawing work is a first step, wherein the last work in a predetermined working lot number is A new work is carried into the first step after being processed in the first step, and the processed work in the first step is not transported until the last work is completed. A press working method, wherein after the completion of the working, the mold is exchanged in a state where the work is sandwiched between the upper and lower molds in the first step.