JPH0686896U - Automatic bender in transfer forging press - Google Patents

Abstract

(57) [Summary] [Purpose] Includes a highly efficient bending process in a transfer forging press. [Structure] An outside fixed bending mold 2 adjacent to a lower mold 1A for the first molding process within an operating range of a transfer device 7.
The movable bending die 3 which can move in the horizontal direction facing the die is attached and an appropriate driving means is added. A vertical cylinder 4 is provided between both molds. [Effect] Preliminary bending and forming is consistently performed with high productivity similar to the original forming action, which greatly contributes to cost reduction. It is resistant to severe hot forging, and has superior maintenance advantages compared to conventional products.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of molding efficiency of a transfer forging press.

[0002]

[Prior art]

 The transfer press fits multiple upper and lower molds to the upper and lower bolsters, supplies the material from one side of the press, and grips it on the gripper (finger) of the transfer bar of the transfer device that connects the left and right sides of the press to operate. It is fitted into the mold of the molding process, and when the molding is completed, the molded material is grasped and lifted by the operation of the transfer bar and transferred to the adjacent mold for the second molding process, and another unmolded material is Insert into one molding die. This is a multi-step press that carries out extremely high-efficiency molding work by simultaneously performing the four-step molding work using a plurality of, for example, four metal molds by sequentially repeating this process.

By the way, in the transfer press among the presses for the purpose of forging, it is often very advantageous and highly efficient to bend the material in advance before the first forming process. For example, to form deformed members such as arms bent into a dogleg shape, the material is bent into a dogleg shape and then subjected to multiple pressing processes such as crushing and punching. Is said to be one of the keys to improving productivity. Conventionally, the orientation of the work piece is different between the first bending step and the subsequent crushing step and roughing step, so after finishing the bending step with a bending press, the material is inverted 90 ° with a manipulator etc. and another forging is performed again. The press was ready to continue the molding work.

However, in this mode, there is a problem of the cost of installing another press and the place to occupy the press, and in the case of hot forging, high heat work of transferring a material heated to a high temperature, It is obvious that there are unfavorable points from the viewpoint of productivity, such as the problem of quality such as the deterioration of formability due to the temperature decrease of the material, and several conventional techniques have been proposed to solve this problem. There is. For example, FIG. 4 shows a conventional technique disclosed in Japanese Utility Model Laid-Open No. 3-68 941. A bending die is provided at the forefront of a die 101 as an original transfer press, and an upper die which is vertically moved. A mold 102 and a lower mold 103 facing the mold 102 are attached to each other, and a pusher 103 for extruding a bent material and a reversing mechanism 104 for changing the direction of the material by 90 ° are formed together with the pusher 103. ing. In this way, the bend forming part can be incorporated into the forging press to perform bending work, and it can be sent to the next forming process by the reversing mechanism, so a separate forging press for bending can be omitted and the temperature of the material can be prevented from lowering. He claims that he was able to achieve the effect. In addition, there is also Japanese Utility Model Laid-Open No. 3-68942, which has substantially the same effect.

FIG. 5 shows another conventional technique provided by Japanese Utility Model Publication No. 59-29836. The purpose of this invention is to use a wedge-shaped slide cam to change the downward pressure of the ram of the press machine to a horizontal pressure and perform punching, shearing, bending, etc. In the figure, when the cam driver 105 fixed to the upper die of the press machine descends together with the ram (not shown), the inclined surface 106 of the cam driver descends while slidingly contacting the inclined surface 108 of the cam slide 107, so that the cam slide is an inclined surface. It is configured to move horizontally by the pressing force converted from vertical to horizontal via. In addition to this, as a conventional technique for converting a vertical pressing force to a horizontal direction by using a slide cam, there is a technique disclosed in Japanese Examined Patent Publication No. 3-40675.

[0006]

[Problems to be solved by the device]

 It can be appreciated that the conventional technique exemplified above eliminates the need for a separate press for bending. However, the conventional technique of FIG. 4 requires a procedure for changing the orientation of the material in the press by 90 °, and the shape of the molded product for which such a request is made is usually an unequal irregular shape. Since it is unavoidable that the posture becomes unstable during reversal, it is not always acceptable as the best configuration. The mechanism also becomes more complicated, and the moving parts are strongly affected by the heat of the high-temperature material, so there is an unavoidable disadvantage in terms of maintenance.

The prior art shown in FIG. 5 is based on the idea of applying a slide cam, and as described, it may be suitable for a sheet metal press specializing in forming such as punching, shearing, and plate bending. However, it is quite doubtful to apply it to a forging press that forms a material heated to a high temperature. As is well known, when a material heated to a high temperature is pressed and deformed forcibly, it is inevitable that the scale peels off from the surface and is scattered around. There is a great deal of concern that such a scale will be caught in the slanting surface where the cam driver and cam slide are in sliding contact, so maintenance becomes extremely troublesome, and if this control is neglected, the forging press may malfunction and lead to failure. There is also the problem of being easy.

An object of the present invention is to provide a transfer forging press including a bending shape having a simple structure and high productivity in order to solve the problems described above.

[0009]

[Means for Solving the Problems]

 The automatic bender of the transfer forging press according to the present invention is such that, in the transfer forging press P, the fixed bending die 2 is attached to one end adjacent to the lower die 1A for the first forming process within the operating range of the transfer device 7, The above-mentioned problem was solved by mounting a movable bending mold 3 facing the fixed bending mold 2 so as to be movable in the horizontal direction together with a driving means, and by providing a vertical cylinder 4 in the middle of the both molds.

In this configuration, the horizontal movement of the movable bending die is performed by the horizontal cylinder 5 engaged with the outer surface of the die, or the slide of the slider 61 and the forging press engaged with the outer surface of the die. 8 and the frame 83 of the forging press are preferably connected by a link mechanism 6 formed by three levers 62, 62, 64 which are rotatably connected to each other and also connected to each other.

[0011]

[Action]

 The material conveyed to the feed inlet side adjacent to the lower die for the first forming process of the forging press enters between the fixed bending die and the movable bending die, where the movable bending die is moved in the lateral direction. Move to and deform the material. When the prescribed molding is completed, the pressing force is released and the material becomes free. In this state, the vertical cylinder operates from below and the material rises with the material placed on it, reaching the level line where the transfer bar operates. Here, the transfer device operates to grip the material, insert the material into the adjacent first die, and continuously perform a plurality of molding processes similar to the conventional one.

[0012]

【Example】

 FIG. 2 is a schematic plan view showing the layout of the entire forging line according to the embodiment of the present invention. 1 (A) and 1 (B) are an enlarged plan view and a vertical sectional front view of one main part of an embodiment of the present invention. In FIG. 2, the raw material W heated to a predetermined temperature by the heater 10 is supplied into the automatic roll 12 by the conveyor 11 and is automatically roll-formed, and then transferred by the transfer forging press P by the conveyor 13 and the pusher 14. The transfer bar 71 of the apparatus 7 is loaded to a predetermined position within the operating range. This position is naturally set below the transfer bar and below the range in which the gripper 72 moves. The transfer bar 71 repeats the movement in the three-dimensional direction at a predetermined timing by the driving force of the transfer cam boxes 73 and 74 provided on both sides of the press.

As detailed in both figures of FIG. 1, at this position, a plurality of molding dies 1 are arranged side by side, a fixed bending mold 2 adjacent to a first molding lower mold 1 A, It corresponds to the opened hollow portion of the movable bending die 3 that is movably provided so as to face the fixed bending die. At this position, the material is sandwiched and pressed by the horizontal horizontal pressing force (pressure in the right direction in the figure), and the material is bent into the shape engraved in both dies. Kick The material W that has been bent and formed is lifted by the operation of the vertical cylinder 4 provided in the lower part together with the bottom plate on which it is placed, and reaches the level line where the gripper 72 of the transfer bar 71 operates, and the gripper 72 pulls from both sides. Extend to grip the material, move (advance) to the first molding die 1A, and insert the material into the die. The following is carried over to the same operation as the conventional transfer forging press, and a plurality of molding processes corresponding to the number of molds simultaneously proceed. That is, the transfer forging press P suspends a plurality of upper molds 9 on an upper bolster 81 that moves up and down together with the slides 8, and fits the lower molds 1 to the lower bolster 82 placed on the bed so as to face each other. During that time, a plurality of forming processes of the material W are simultaneously progressed.

FIG. 3 shows another embodiment of the present invention. That is, the point different from the previous example is that in this example, the drive source for pressing the movable bending die 3 in the horizontal direction to move and perform bending is diverted from the vertical movement of the slide 8 instead of the horizontal cylinder. is there. If the movement of the slide is diverted, it is not necessary to separately provide a special drive source, which is an advantage. However, the use of slide cams, which is included in the prior art, is not suitable for hot forging in the face of severe conditions from the viewpoint of sliding on inclined surfaces that must be strictly controlled. Many things have already been mentioned. In the present invention, in order to eliminate the concern, a link mechanism 6 having a simple structure and relatively durable under adverse conditions is applied. That is, the slider 61 engaged with the tail of the movable bending die 3, the three levers 62 that rotatably connect the slider, the frame 83, and the slide 8 of the forging press, and also interconnect them. The link mechanism 6 is formed by 63 and 64, and the slide lifting movement is converted into the horizontal movement of the movable bending die 3.

[0015]

[Effect of device]

 Since the present invention has the configuration described above, the preliminary bending process can be performed consistently within the operating range of the transfer device of the transfer forging press with the same high productivity as the original forming process, and the production cost can be improved. It has the effect of making a great contribution to the reduction of There is no need for a reversing mechanism between the upper and lower bolsters in the press, which simplifies the mechanism in the vicinity of where severe heat conditions are encountered, greatly reducing maintenance complexity, and uneven material shape. There is no need to consider the unstable attitude when reversing as it is. It has a structure that is relatively resistant to the scattering of high-heat scale, which is an unavoidable condition for a forging press, and has the advantage of daily work that it can continue work with less trouble during operation compared to the past. Can not be overlooked.

[Brief description of drawings]

FIG. 1 is a plan view (A) and a vertical sectional front view (B) showing an embodiment of the present invention.

FIG. 2 is a schematic plan view showing an entire layout to which the embodiment is applied.

FIG. 3 is a front view showing another embodiment.

FIG. 4 is a partially longitudinal front view showing a conventional technique.

FIG. 5 is a vertical sectional front view showing another conventional technique.

[Explanation of symbols]

 1 Press lower mold 2 Fixed bending mold 3 Movable bending mold 4 Vertical cylinder 5 Horizontal cylinder 6 Link mechanism 7 Transfer device 8 Slide 10 Heater 11 Conveyor 12 Automatic roll 13 Conveyor 14 Pusher 61 Slider 62 Lever 63 Lever 64 Lever 71 Transfer Bar 72 Gripper 73 Transfer cam box 74 Transfer cam box 81 Upper bolster 82 Lower bolster 83 Frame P Transfer forging press W Material

Claims (3)

[Scope of utility model registration request] 1. In a transfer forging press P,
A fixed bending die 2 is attached to one end of the transfer device 7 adjacent to the lower die 1A for the first forming step within the operating range of the transfer device 7, and the movable bending die is opposed to the fixed bending die 2 and is movable in the horizontal direction. An automatic bender in a transfer forging press, characterized in that a mold 3 is attached together with driving means, and a vertical cylinder 4 is provided between the two molds. 2. The automatic bender in a transfer forging press according to claim 1, wherein the horizontal movement of the movable bending die is performed by a horizontal cylinder 5 engaged with an outer surface of the die. 3. The slider according to claim 1, wherein the movable bending die is rotatably connected to the slider 61, the slide 8 of the forging press, and the frame 83 of the forging press, which are engaged with the outer surface of the die. An automatic bender in a transfer forging press, which is characterized by a link mechanism 6 formed by three levers 62, 62, 64 that are also connected to each other.