JPH0244609B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a transfer feeder for progressively conveying workpieces in a multi-process press, and in particular a transfer feeder in which a plurality of equally spaced stations are arranged in two rows in parallel. It is suitable for use in the transfer feeder of a press made of

(Prior Art) FIG. 6 is an explanatory diagram showing, as an example, a case where a cup-shaped product is molded using a transfer press using a thin plate-shaped material. In the figure, a thin sheet material is blanked and formed at a first station, the edge of the cup is trimmed at a second station, the edge of the cup is curled at a second station, and the material is reformed at a second station to become a product. The conventional transfer feeder used for such press working, as shown in the plan view in Fig. ₁ , a ₂ , a ₃ , a ₄ and these workpieces a (hereinafter referred to as fingers a ₁ ,
Fingers b ₁ , b ₂ , b 3 , b ₄ (indicated by b to represent the fingers in the following) for sequentially feeding the fingers b ₁ , b ₂ , b ₃ , b ₄ (denoted by b representing the fingers) are Feed bars C ₁ and C ₂ installed horizontally and parallelly on both sides
The feed bars C ₁ and C ₂ are mounted on the fifth
It moves in a horizontal rectangular manner in the order indicated by arrows S ₁ and S ₂ in the figure, making it possible to sequentially transport the workpiece a.

That is, when the pair of opposing fingers b and b move horizontally in parallel in the direction in which the feed bars C ₁ and C ₂ approach each other, they clamp the workpiece a located at the stations, and move the feed bar C ₁ in the station arrangement direction. , _C2 move, the workpieces 1 are transported all at once to the next station.

Next, when the feed bars C ₁ and C ₂ move horizontally in the direction away from each other, the fingers b and b leave the workpiece a that had been held between them on the station and move away, and the subsequent feed bars C ₁ and C ₂ move away from each other.
By moving backward in the station arrangement direction, the station returns to the position facing the first station and waits for the next workpiece to be held.

In this way, the conventional transfer feeder progressively conveys the workpiece by horizontal rectangular motion, but a pair of horizontally parallel feed bars progressively conveys the workpiece in a row at stations arranged at equal intervals. However, the only way to speed up conveyance was to increase the drive speed of the feed bar.

However, there are many restrictions on increasing the drive speed of the feed bar, and the limit has already been reached.However, if the press station is made of double rows and two rows of workpieces are transported at the same time, it is possible to increase the speed of the feed bar by using a single-row press. A transport capacity twice the workpiece transport speed can be obtained. Figure 7 shows the actual application developed by the present applicant in 1973.
159160 (Refer to Utility Model Application Publication No. 57-82430 Microfilm) FIG.

In the figure, , , and ′, ′, ′ respectively indicate six stations, a ₂ to a ₄ and
a ₂ ′ to _{a 4} ′ each indicate the workpiece, d ₂ to d ₄ each indicate the fingers, e ₁ , e ₂ , e ₁ ′, and e ₂ ′ each indicate the feed bar, and Fig. 7 shows the feed bar. shows the state in which it is in the retracted position.

Refer to Figure 5 for the operation order of the feed bar.
The feed bars e ₁ and e ₂ ′ move in a horizontal rectangle in the order indicated by the arrow S ₂ , and the feed bars e ₂ and e ₁ ′ move in a horizontal rectangle in the order indicated by the arrow S ₁ .

(Problems to be Solved by the Invention) In the double-row transfer feeder according to the prior art described above, the conveyance amount of the workpiece is doubled;
This has the great effect of doubling the production capacity of the press, but the dimension indicated by T in Fig. 7 becomes larger, and the depth dimension of the press bed and die set (mold) (the dimension in the T direction) increases. Grow bigger,
(simply about twice as much), therefore, the entire press needs to be large, which is not realistic.

Moreover, since the center guide of Utility Application No. 159,160 mentioned above moves in two directions, the center guide drive mechanism inevitably has the problem that troubles are more likely to occur because the space inside the press is narrow. .

In addition, the center guide bar of Utility Model Publication No. 60-27542 developed by the applicant has a fixed center guide bar, and the position of the workpiece is regulated by the finger attached to the side food bar and the outer circumference of the flange of the workpiece. This is done by hitting the center guide,
If the material of the workpiece is thin or anisotropic, the outer circumference of the flange will not be a perfect circle until the trimming process, and even if the outer circumference of the flange is placed against the center guide, the position will be incorrect. There were problems in that accurate regulation was not always possible, and since the center guide was fixed, the design had to be made so that the mold coming down from above would not hit the center guide bar.

It is an object of the present invention to solve the above-mentioned problems and to provide a press transfer method with a simple structure and high productivity.

(Means and effects for solving the problem) The present invention has been made in view of the above points, and is made by inverting a cup-shaped container, which is a workpiece illustrated in FIG. The shape of the side wall (indicated by γ in FIG. 6) is molded into the final shape at the first station (that is, the side wall shape is the same from the first station to the second station).
The die set of the press is configured as shown in FIG. The feed bar on the opposite side is configured to move in a horizontal rectangular direction, and the feed bar on the opposite side is configured to move only back and forth so as to come into contact with the side wall of the cup-shaped container when transporting the workpiece as a rod-shaped guide support. The workpiece is held between the fingers, comes into contact with the rod-shaped guide support, and is transported between the stations while sliding.
In addition to accurately positioning the workpiece in the direction perpendicular to the feed direction, regulations on mold structure, size, and installation are relaxed, making maintenance and mold replacement easier, and is highly productive. A method can be obtained.

(Example) An example of the present invention will be described below based on the drawings.

FIGS. 1a and 1b are plan views schematically showing the main parts of the transfer feeder of the present invention,
〜indicates the station number, 1 ₁ ,
1 ₂ , 1 ₃ , and 1 ₄ are workpieces being press-formed, and the details of the forming process will be explained using FIG. 2a.

That is, FIG. 2a is an explanatory diagram of the case where a cup-shaped product is manufactured by molding from a thin plate-like material as an example, and 1 ₁ to 1 ₄ are workpieces molded at processing stations ~, respectively. The processing process is explained using conventional technology (see Figure 6).
Therefore, I will omit it.

α indicates the shape of the side wall of the workpiece, and one of the features of the present invention is that it is the same from the first station to the second station.

Figures 2a and 2b show cross-sectional shapes of the rod-shaped guide support ₂₂ shown in Figure 1a, and in Figure 2a, the support ₂₂ moves forward toward the workpiece, and the workpiece indicated by α It shows a state in which it is in contact with the side wall of.

The cross-sectional shape of the guide support 2 ₂ in FIG. 2a is a circle, but it has a trapezoidal shape as shown by 2 ₂ ″ in FIG. 2b, and the shape of the part that contacts the side wall of the workpiece is α. It is also possible to have a shape that follows the shape shown in .

Returning to FIG. 2a, the shape of the workpiece indicated by the chain double-dashed line is the guide support ₂ or 2.
This diagram schematically shows that the depth of the cup-shaped shape of the workpiece can be made shallow to the extent that ₂ ' can come into contact with the side wall of the workpiece indicated by α.

Returning to FIGS. 1a and 1b, 3 ₁ to 3 ₄ are fingers attached to the finger support 2 ₁ , respectively.
FIG. 1a shows the position where the finger support 2 ₁ and the guide support 2 ₂ are retreated relative to the workpiece,
From this state, the workpieces 11 to 14 are moved forward toward the workpieces as shown by arrows _P1 and _P2, respectively, and the fingers 31 to 14 are moved to the workpieces ₁₁ to ₁₄ , respectively, as shown in FIG. _1b .
At the same _time , the guide support 2 ₂ comes into contact with the workpiece, and then the finger support 2 ₁
The workpieces move in the direction of the arrow Q shown in Figure b, and are conveyed to the next station while sliding while contacting the guide support ₂₂ .

In other words, finger support 2 ₁ is S ₁ in FIG.
The guide support 2 ₂ is configured to move in a parallel rectangular direction as _shown in FIG.

FIG. 3 is a plan view schematically showing a main part of a transfer feeder according to an embodiment used in a transfer press having a double-row station of the present invention. In the figures, the same reference numerals are used for members belonging to one row (the lower row of the double rows in FIG. 3) and corresponding to those explained in FIG. Parts belonging thereto which correspond to those described in FIG. In FIG. 3, finger supports 2 ₂ and 2 ₂ ' are respectively S ₁ in FIG.
And the horizontal rectangular movement shown by S ₂ , the guide support 2
₂ and 2 ₂ ' move back and forth toward their respective workpieces in the same way as explained in FIGS. 1a and 1b, so the details will be omitted.

As can be easily seen by comparing FIG. 1a with the prior art in FIG. 4, the depth dimension of the press (vertical dimension in FIGS. 1a and 4) is It is smaller and requires a smaller press, and the guide support (2 ₂ in Figure 1) only needs to move forward and backward relative to the workpiece, which greatly simplifies the structure of the transfer feeder. This has a great effect. Further, the present invention is particularly effective when press working is performed using double rows of stations in order to increase the conveyance speed of the workpiece.

That is, when comparing the one in FIG. 3, which is an embodiment of the present invention, and the one in FIG. 7, which is a specific example of the prior art, the dimension R in FIG. 3 is smaller than the dimension T in FIG. 7. can be made significantly smaller (about half or less if the size of the workpiece is subtracted), so it can be seen that the press mold and press can be much smaller than conventional ones.

(Effects of the Invention) This invention is made as detailed above, and not only can the structure of the transfer feeder be greatly simplified, but also the press mold and press can be made much smaller than conventional ones. This makes it possible to provide a transfer feeder with a simple structure and high productivity, which can be effectively applied to single-row and double-row stations.

In particular, this invention provides a press transfer method that has the following technical effects by reciprocating the guide support that functions as a center guide bar only in the direction perpendicular to the feeding direction of the workpiece. is obtained.

a Since the body of the workpiece is regulated by the guide support, the workpiece can be accurately positioned perpendicular to the feeding direction.

b Since the guide support moves in the right angle direction,
Regulations on mold structure, size, installation, etc. are relaxed, making maintenance and mold changes easier.

c. Since the guide support does not move in the direction in which the workpiece is fed, the drive mechanism for the guide support is simplified and troubles are less likely to occur.

d Since the body of the workpiece slides on the side of the guide support, there is no need for fingers.

[Brief explanation of the drawing]

FIG _. 1 is a plan view schematically showing the main parts of an apparatus for carrying out the method of the present invention, _{and FIG} . 1b shows them in the advanced position. FIG. 2a is an explanatory diagram of one embodiment of molding a cup-shaped container using the transfer feeder according to the present invention;
The figure is a plan view schematically showing the main parts of an embodiment of the present invention applied to a transfer press having a double-row station, and FIG. 4 is a diagram illustrating the main parts of an embodiment of a conventional transfer feeder. FIG. 5 is an explanatory diagram of the rectangular movement of the transfer feeder of the one shown in FIG. 4, FIG. The figure is a plan view schematically showing the main parts of an embodiment of a prior art transfer feeder having double rows of stations. ,,,,...Station, 1 ₁ ~
1 ₄ , 1 ₁ ′ to 1 ₄ ′ ... Workpiece, 2 ₁ to _{2 1} ' ... Finger support, 2 ₂ , 2 ₂ ', 2 ₂ '' ... Guide support, 3 ₁ to 3 ₅ ... Finga.

Claims (1)

[Claims] 1. In a press transfer feeder consisting of a plurality of stations arranged in two parallel rows at equal intervals,
The die set of the press is configured so that the side wall shape of the workpiece is formed into the final shape at the first station, and workpiece clamping fingers are provided inside at respective positions facing each station on one side of the transfer feeder. A finger support equipped with a finger support is provided, and the other side has a cross-sectional shape such that it comes into contact with the side wall of the workpiece, and the length of the entire station has the same cross-sectional shape in the axial direction. A rod-shaped guide support is provided, and the finger support is reciprocated in the workpiece feed direction and moved forward and backward relative to the workpiece, and the rod-shaped guide support is moved in synchronization with the forward and backward movement of the finger support. A press transfer method characterized by transferring a workpiece by moving the workpiece only back and forth.