KR101623293B1 - Multi-step heading machine - Google Patents

Abstract

A multi-step heading machine of the present invention includes a base portion, a die block, a plurality of dies, a ram, a punch block, a plurality of punches, and a drive portion, the die blocks being divided into die units and arranged in the width direction of the base portion Each of the die blocks has a lateral reference surface and a vertical reference surface formed in the vicinity of the center in the width direction and the vertical direction and the base portion (back plate) has a plurality of lateral direction reference members and upper and lower reference members A horizontal clamping mechanism and a vertical clamping mechanism, wherein the punch block is divided in units of punches and arranged in the width direction of the ram, and each punch block has a horizontal reference plane and a vertical reference plane, A horizontal clamping mechanism, and a vertical clamping mechanism. Thus, the centering defect between the die and the punch when the forming heat is generated in the head forming can be reduced, and high head forming accuracy can be ensured.

Description

Multi-step heading machine {MULTI-STEP HEADING MACHINE}

The present invention relates to a multi-step heading machine for head-forming a workpiece in a plurality of steps by a plurality of sets of dies and punches.

In a multi-step heading machine in which a workpiece is head-formed by a plurality of processes to produce a part having a predetermined shape, as disclosed in, for example, Patent Document 1, a plurality of sets of dies and punches are coaxially arranged to face each other, And the workpiece is conveyed in turn by a conveying mechanism. The die is of a fixed type provided on the side of the base, and the punch is of a movable type provided on the side of the ram that reciprocally drives. Normally, by exchanging dies and punches, parts having different shapes can be manufactured. There is a multi-step heading machine in which a die block and a punch block are used in order to shorten the working time in the replacement work of the die and the punch, and to facilitate the work easily and reliably.

In the multi-step heading machine of this type, a plurality of dies are mounted on the die block at predetermined intervals and mounted on the seating surface of the base portion. Then, the die replacing operation is carried out by separating the die block from the base portion, replacing the die, and then reinstalling the die portion in the base portion. By using the die block, the operator can perform the replacement work of the die in a good work environment outside the base portion, rather than at the place where the base portion is made. Therefore, the exchange operation is facilitated and the reliability of the die mounting is also improved. Similarly, in the punch block mounted on the seating surface of the ram, a plurality of punches can be exchanged from the outside of the base portion.

Japanese Utility Model Publication Disclosure Publication H05-93954

However, when the head forming process is continued with the multi-step heading machine, the heat of molding is accumulated, and not only the die and the punch but also the die block and the punch block increase in temperature and thermally expand. In order to suppress this, cooling oil which also serves as lubrication is used, but a certain degree of thermal expansion is inevitable. At this time, in many cases, the degree of thermal expansion differs between the die block and the punch block, and in general, thermal expansion is remarkable in the die block that pressurizes the forming force. As a result, the spacing between the dies is increased, resulting in a deviation in the spacing between the punches. That is, centering defects occur between the opposing die and the punch, leading to a reduction in the accuracy of heading forming.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the background art described above, and it is an object of the present invention to provide a multi-step heading machine capable of reducing centering defects between a die and a punch when forming heat is generated, do.

A multi-step heading machine of the present invention comprises a base, a die block detachably mounted on the base, a plurality of dies interchangeably mounted on the die block, a ram reciprocally driven in the longitudinal direction of the base, A punch block detachably mounted on the punch block, a plurality of punches which are exchangeably mounted on the punch block and pressurized by the workpiece to advance the head forming of each process by aligning the die and the axis, and a driving unit for driving the ram Wherein the die block is divided in the die unit and arranged in the width direction of the base portion, and each of the divided die blocks has a lateral reference surface formed in the vicinity of the center in the width direction, And the upper and lower reference surfaces formed in the vicinity of the center, A lateral clamping mechanism that fixes the respective die blocks in a state of being spaced apart from each other in the width direction in a state in which the lateral reference surfaces are in contact with the lateral direction reference members, And a vertical clamp mechanism for vertically fixing the die blocks in a state in which the upper and lower reference surfaces are in contact with the upper and lower reference members, wherein the punch block is divided into the punch units Wherein each of the divided punch blocks is arranged in the width direction of the ram and has a horizontal reference surface formed in the vicinity of the center in the width direction and a vertical reference surface formed in the vicinity of the center in the vertical direction, A plurality of lateral direction reference members to which the lateral direction reference surfaces of the transverse direction reference surfaces contact, A plurality of upper and lower reference members in contact with the upper and lower reference planes of the respective punch blocks, and a plurality of upper and lower reference members which are in contact with the upper and lower reference members And a vertical clamping mechanism for vertically fixing the punch blocks.

It is preferable that at least one of the transverse clamping mechanism of the base portion and the transverse clamping mechanism of the ram is to fix all die blocks and / or all punch blocks in the width direction by a connection clamping mechanism driven by a common operation source Do.

The connecting clamp mechanism may include a transmission rod for transmitting the operation force of the operation source to the next process in sequence, a bell link member for pressing and moving the die block or the punch block by being pivoted by the transmission rod, And an elastic member that resists the bell-link member.

At least one of the die block and the punch block may be provided with an engaging member for mutually displacing the blocks.

In the multi-step heading machine of the present invention, the die blocks, which are conventionally integrated products for mounting a plurality of dies, are divided into individual die blocks and are arranged apart from each other. Further, a reference plane is provided near the centers of the individual die blocks in the width direction and the vertical direction, and fixed to the base portion. Similarly, the punch block is divided into punch blocks for each punch and separated from each other, while a reference surface is provided near the center in the width direction and the vertical direction, and fixed to the ram. Thus, even if the individual die blocks and the punch blocks are thermally expanded by the forming heat, they are spaced apart from each other, so that they do not affect other blocks. Further, the individual die blocks and punch blocks are thermally expanded in the width direction and the vertical direction with almost the center as a reference. On the other hand, in the conventional integrated die block and punch block, since the end face of the block is pressed and fixed to the seating surface, the center is displaced by the thermal expansion. That is, according to the present invention, displacement of the center of the block coinciding with the central axis of the die and the punch can be reduced as compared with the prior art. Therefore, the displacements of the central axes are reduced in the dies and the punches mounted on the individual die blocks and punch blocks, and the centering defects between the die and the punch are reduced, and high heading accuracy can be ensured.

Further, in the configuration in which the lateral clamping mechanism is a connection clamping mechanism, the widthwise fixation of a plurality of blocks can be driven by a common operation source, and an operator for each block is not required, and the cost can be reduced.

In addition, in the configuration in which the connection clamp mechanism includes the transmission rod, the bell link member, and the elastic member, since the connection clamp mechanism can be realized with a simple configuration, the cost can be remarkably reduced.

Further, in the configuration in which at least one of the die block and the punch block includes the engaging member that mutually displaceably couples the blocks, a plurality of blocks can be collectively separated and mounted, thereby reducing the amount of replacement work, , The axis alignment of the die and the punch can be easily and reliably advanced from the outside of the base portion. Further, since the engaging members are mutually displaceably connected to each other between the blocks, thermal expansion is not disturbed.

1 is a plan view for explaining the overall configuration of a multi-processing heading machine according to a first embodiment of the present invention.
Fig. 2 is a front view showing five die blocks mounted on a back plate on the base side. Fig.
Fig. 3 is a plan view showing five die blocks mounted on a back plate on the base portion side.
4 is a side sectional view of the die block mounted on the back plate of the base portion.
5 is a front view of the back plate.
Fig. 6 is a perspective view schematically illustrating the shape of the rear surface viewed from the front of the die block.
7 is a plan view showing a part of a lateral clamping mechanism for fixing the die block in the width direction.
8 is a plan view showing the overall configuration of a multi-processing heading machine according to a second embodiment of the present invention.
9A is a front view of a back plate on the side of a base portion on which seven die blocks are mounted and fixed.
9B is a right side view of the back plate.

A first embodiment for carrying out the present invention will be described with reference to Figs. 1 to 7. Fig. 1 is a plan view for explaining the overall configuration of a multi-processing heading machine 1 according to a first embodiment of the present invention. The multi-step heading machine 1 according to the embodiment sequentially performs five steps of heading forming on a workpiece by a combination of five sets of dies 4 and punches 7. [ The multi-step heading machine 1 includes a base portion 2, five sets of die blocks 3 and a die 4, a ram 5, five sets of punch blocks 6 and punches 7, 8), and a wire material cutting / feeding unit, a transfer unit, a knockout unit, and a trimming unit (not shown).

The base portion 2 is a housing for arranging the respective portions, and is formed firmly. On the left side of the base portion 2 in the drawing, a back plate 21 extending in the width direction is provided. The die block 3 is divided into five units of the die 4 and is detachably fixed to the back plate 21 so as to be arranged in the width direction of the base unit 2. [ The five dies 4 are replaceably mounted on the front side (left side in the figure) of each die block 3, and a predetermined machining die is formed on the entire front side in the figure.

The ram 5 is held on the right side of the base portion 2 in a manner capable of reciprocating in the longitudinal direction (left and right direction in the drawing) with respect to the base portion 2. The punch block 6 is divided into five punches 7, and arranged in the width direction of the ram 5 to be detachably fixed. The five punches 7 are replaceably mounted in front of the respective punch blocks 6 (on the right side in the figure), and a predetermined machining mold is formed on the front surface in the rightward direction in the figure.

5 sets of dies 4 and punches 7 are set opposite to each other with a common axis and when the ram 5 is driven after the workpiece is mounted on each die 4, Is driven to the right in the figure, so that the head forming press proceeds by pressurizing the workpiece. The upper side of the set of the die 4 and the punch 7 (the set of the die block 3 and the punch block 6) is the upstream process and the lower side of the drawing is the downstream process.

A wire material cutting and feeding section is provided so as to cut a workpiece having a predetermined length from a long wire rod and supply the workpiece to a set of the most upstream of the die 4 and the punch 7. [ In addition, a transfer section is provided for transferring the workpiece to and from each set, and for transferring the workpiece sequentially. In addition, a knockout portion is provided to discharge the pressurized workpiece from each set of die 4. Further, a trimming portion is provided to remove the processing debris from the finished workpiece in the last set.

A motor 81 is provided as a driving source of the driving section 8 for driving the ram 5, the wire material cutting / feeding section, the transfer section, the knockout section, and the trimming section. As the motor 81, for example, an induction motor that operates with a three-phase AC power source can be used. A flywheel 82 is provided for accumulating and discharging the driving force output by the motor 81. The driving force from the flywheel 82 is reduced by the reduction gear pair 83 and input to the crankshaft 84 that drives the ram 5. [ The rotational motion is converted into the reciprocating motion by the crank shaft 84, and the ram 5 is reciprocally driven with respect to the base portion 2. [ A PKO cam 85 is provided at the other end of the crankshaft 84 so as to rotate integrally.

A driving force is branched from the crankshaft 84 to the side shaft 87 through the pair of gears 85 and the pair of bevel gears 86. [ The cutter cam 88 and the transfer cam 89 are integrally rotated on the side shaft 87. A transfer drive 8A is provided on the side shaft 87 to drive the pusher cam 8B and the five open-close cams 8C. The feed cam 8E, the five knock-out cams 8F and the trimming cam 8G are driven to be interlocked with each other via the pair of bevel gears 8D in the side shaft 77. [ The feed cam 8E is connected to the feed roller 8H to drive it.

The wire member cutting and feeding section is driven by the PKO cam 85, the cutter cam 88, and the feed roller 8H in the driving section 8 described above. Further, the transfer portion is interlockingly driven by the transfer cam 89 and the open-close cam 8C. Further, the knockout cam 8F drives a knockout pin (not shown) to discharge the workpiece from the die 4, whereby the knockout portion is interlocked and driven. The trimming cam 8G also causes the trimming unit to be interlocked and driven.

Next, the structure of the die block 3 and the mounting structure of the base block 2 will be described in detail. Fig. 2 is a front view of the five die blocks 3 mounted on the back plate 21 of the base portion 2, Fig. 3 is a plan view, and Fig. 4 is a side sectional view. 5 is a front view of the back plate 21, and Fig. 6 is a perspective view schematically showing the shape of the rear surface viewed from the front face of the die block 3.

As shown in Figs. 2 and 3, the five die blocks 3 have substantially the same shape. The die blocks 3 are fixed so as to be spaced apart from each other by a distance d in the width direction of the base portion 2. [ Although the distance d is shown exaggerated in the drawing, it is actually less than 1 mm, and even if the die block 3 thermally expands due to the forming heat generated during the head forming, it does not interfere with each other. The die block 3 has a die mounting hole 31 at the front center. The die 4 which is replaceably inserted into the die mounting hole 31 is fixed by a mounting member 32 and a mounting bolt 33 provided above and below the die mounting hole 31.

A handle 34 is provided on the right side of the die block 3 at the right end of Fig. 2 so that the die block 3 can be moved in the lateral direction in Fig. In addition, at an upper end and a lower end of the die block 3 other than the left end of Fig. 2, there is provided an engaging member 35 which is capable of mutually displacing relative to each other. The engaging member 35 can be moved to the right together with the die block 3 on the left side in the drawing.

3 and 4, each die block 3 is detachably fixed to the back plate 21 on the side of the base portion 2 disposed on the rear side, Is determined. More specifically, each die block 3 is provided with slide grooves 36, 36 extending in the width direction and opening toward the back surface at positions higher and lower than the die mounting holes 31 on the back side, respectively . The groove height inside the slide groove 36 is larger than the opening height.

On the other hand, pulling clamp mechanisms 22 and 22 for pulling the die block 3 in the backward direction and fixing the die block 3 are provided at two positions corresponding to the slide grooves 36 on the front surface of the back plate 21. The pulling clamp mechanism 22 is constituted by a cylinder chamber 23, a clamp member 24, and a hydraulic mechanism (not shown). The cylinder chamber 23 is a cylinder-shaped oil-tight closed space formed in the back plate 21. The clamp member 24 is a shaft-shaped member whose middle portion is thin and whose front side and rear side are enlarged. The enlarged locking portion 25 on the front side of the clamp member 24 is capable of engaging with the slide groove 36 of the die block 3. The enlarged piston portion 26 on the rear side of the clamp member 24 is disposed in the cylinder chamber 23 in an oil-tight manner. The hydraulic mechanism not shown introduces and discharges hydraulic oil into the rear space 27 on the rear side of the piston 26 in the cylinder chamber 23 to advance and retract the clamp member 24. [

In order to separate the die block 3 from the mounting state shown in Figs. 2 to 4, first, the laterally-described clamping mechanism 2A and the later-described upper and lower clamping mechanism 2K are released. Then, the hydraulic mechanism of the pulling clamp mechanism 22 is operated to introduce operating oil into the rear space 27 to advance the clamp member 24. Then, the handle 34 of the die block 3 on the right end of Fig. 2 is pulled to the right. Thereby, the five die blocks 3 are connected and moved together by the action of the engaging member 35, and can be separated. Conversely, in order to mount the die block 3 on the back plate 21, the clamp member 24 is first advanced and the slide groove 36 is formed in the engaging portion 25 at the tip end of the clamp member 24, The five die blocks 3 are aligned and loaded. Next, the hydraulic mechanism is operated to discharge the operating oil in the rear space 27, retract the clamp member 24, and pull the die block 3 to fix it. As described above, the pulling clamp mechanism 22 advances the fixing and positioning of the die block 3 in the forward and backward directions. Finally, the lateral clamping mechanism 2A advances the positioning in the width direction (the width direction of the base portion 2), and the vertical clamping mechanism 2K advances the positioning in the vertical direction.

Next, the positioning structure in the width direction and the vertical direction of the die block 3 will be described in detail. 5, two lateral reference members 28 and 28 and a vertical reference member 29 are projected forward from the front face of the back plate 21 in correspondence with the respective die blocks 3 . On the other hand, as shown in Fig. 6, two lateral reference notches 37, 37 and a vertical reference notch 39 are provided on the back surface of each die block 3. A vertical surface formed in the vicinity of the center in the width direction of the die block 3 among the circumference of the lateral reference notch 37 serves as the lateral reference surface 38. [ A horizontal upper surface formed in the vicinity of the center of the die block 3 in the vertical direction of the periphery of the upper and lower reference notches 39 serves as the upper and lower reference surfaces 3A.

The two lateral reference planes 38 of the die block 3 are respectively engaged with the side faces 281 of the lateral reference member 28 of the back plate 21 when the die block 3 is mounted on the back plate 21. [ On the left side in Fig. 5 becomes the normal positioning state in the width direction. The state in which the upper and lower reference planes 3A of the die block 3 are in contact with the upper surface 291 of the upper and lower reference members 29 of the back plate 21 from above is a normal positioning state in the up and down direction.

In order to stabilize the normal positioning state in the width direction and the vertical direction described above, the back plate 21 is provided with the lateral clamping mechanism 2A and the vertical clamping mechanism 2K. The upper clamping mechanism 2K is disposed on the upper side of the back plate 21 as shown in Fig. 4, and is composed of a bell link member 2L, a pressing member 2M, and an actuator 2N. The bell link member 2L is a member bent in an L shape and supported so as to be swingable at a bending position 2L1. An actuator 2N is connected to one end 2L2 of the bell link member 2L. A pressing member 2M is fixed to the other end 2L3 of the bell link member 2L and the pressing member 2M is in contact with the upper face 37 of the die block 3. [ The actuator 2N may be a hydraulic mechanism, but is not limited thereto.

The die block 3 is carried into the front side of the back plate 21 and the pulling clamp mechanism 22 is operated to pull the die block to the back plate 21 and then the actuator 2N is operated. Then, in Fig. 4, the bell link member 2N swings in the counterclockwise direction, and the pressing member 2M presses the die block 3 downward and moves. The upper and lower reference planes 3A of the die block 3 reliably come into contact with the upper faces 291 of the upper and lower reference members 29 of the back plate 21. [ The actuator 2N stably maintains this contact state during heading molding.

On the other hand, as shown in Fig. 5, the transverse clamping mechanism 2A is provided at the upper and lower portions of the back plate 21. As shown in Fig. Fig. 7 is a plan view showing a part of the transverse clamping mechanism 2A for fixing the die block 3 in the width direction, and the lower side of Fig. 7 corresponds to the right side of Fig. The transverse clamping mechanism 2A is a connection clamping mechanism driven by an actuator 2B serving as a common operation source and fixes five entire die blocks 3 in the width direction. The transverse clamping mechanism 2A includes an actuator 2B and five sets of transmission rods 2C, a bell link member 2D and a coil spring 2E corresponding to elastic members provided for each die block 3 Consists of.

As shown in Fig. 5, the actuator 2B is provided on the right side surface of the back plate 21 in the figure, and is capable of moving the head transmission rod 2C1 to the left in the drawing. The actuator 2B may be a hydraulic mechanism, but is not limited thereto. As shown in Fig. 7, five transmission rods 2C and five bell-link members 2D are alternately arranged and arranged in the width direction of the back plate 21. As shown in Fig. The bell link member 2D is an arm-shaped member extending in a straight line and is supported so as to be swingable in the central portion 2D1. The forward and rearward transmission rods 2C are in contact with one end 2D2 of the bell link member 2D. The other end 2D3 of the bell link member 2D is in contact with the widthwise pressing surface 3B of each die block 3. A coil spring 2E is inserted between the width direction pressing surface 3B and the width direction fixing portion 2F on the back plate 21 side. 7, the attitude of the bell link member 2D when the transverse clamp mechanism 2A is operated and the die block 3 is fixed is indicated by a solid line, and the bell link member 2D when the braking member is released, Is indicated by a one-dot chain line.

The die block 3 is carried to the front side of the back plate 21 and the pulling clamp mechanism 22 is operated to pull the die block 3 to the back plate 21 and then the actuator 2B is operated. 7, the transmission rod 2C is driven upward in the drawing to sequentially transmit the operating force so that the five belleville members 2D oscillate in the counterclockwise direction respectively and the other end 2D3 moves in the width direction pressing surface 3B). At this time, a reaction force is generated in the coil spring 2E to adjust the swing angle of the bell link member 2D, and the operation force applied to the five die blocks 3 is equalized. This operation is respectively performed by the upper and lower transverse clamp mechanisms 2A and the two width direction reference planes 38 of the respective die blocks 3 are disposed on the side surfaces 281 of the width direction reference member 28 of the back plate 21. [ . The actuator 2B stably maintains this contact state during heading molding.

On the other hand, the punch block 6 mounted on the ram 5 also has the same structure as that of the die block 3, and a mounting structure. That is, the punch block 6 is divided into five punches 7, and is fixed so as to be spaced apart from each other in the width direction of the ram 5. Each of the divided punch blocks 6 has a horizontal reference surface formed in the vicinity of the center in the width direction and a vertical reference surface formed in the vicinity of the center in the vertical direction. The ram 5 has five horizontal sets of upper and lower reference members and five upper and lower reference members and a horizontal clamping mechanism and a vertical clamping mechanism in contact with the lateral reference surface of the punch block 6. The punch block 6 is provided with a handle 34 and an engaging member 35 which are the same as the die block 3.

Each of the horizontal reference planes 38 and the upper and lower reference planes 3A, the lateral reference members 28 and the upper and lower reference members 29 are arranged such that the centers of the die block 3 and the punch block 6 coincide with each other. . Therefore, even if the die block 3 and the punch block 6 are separated, the actual mounting situation is simulated using the adjustment jig from the outside of the base portion 2 so that the centers of the protrusions 3 and 6 are matched , The die 4 to be mounted, and the punch 7 in advance.

According to the multi-step heading machine 1 of the first embodiment, the die blocks which were conventionally integrated products for mounting the plurality of dies 4 are divided into individual die blocks 3 for each die 4, d. A width direction reference plane 38 and a vertical reference plane 3A are provided near the centers of the individual die blocks 3 in the width direction and the vertical direction and are fixed to the back plate 21. [ On the other hand, the structure and mounting structure of the punch block 6 are the same as those of the die block 3. Thus, even if the individual die blocks 3 and the punch blocks 6 are thermally expanded, they are spaced apart from each other, so that they do not affect other blocks. Further, since the individual die block 3 and the punch block 6 thermally expand in the width direction and the vertical direction with almost the center as a reference, displacement of the center of the block is reduced as compared with the prior art. Therefore, displacement of the center of the shaft is reduced in the die 4 and the punch 7, and the centering defect between the die 4 and the punch 7 is reduced, thereby ensuring high heading accuracy.

The lateral clamping mechanism 2A is a connection clamping mechanism including the transferring rod 2C, the bell link member 2D and the coil spring 2E, so that the cost can be remarkably reduced .

Since the die block 3 and the punch block 6 are provided with the engaging member 35, it is possible to collectively separate and mount the plurality of blocks, thereby reducing the amount of replacement work, And the punch 7 can be easily and reliably moved from the outside of the base portion 2.

Next, a multi-processing heading machine according to the second embodiment will be described mainly with reference to Figs. 8 and 9, which are different from the first embodiment. Fig. 8 is a plan view showing the entire configuration of the multi-processing heading machine 1X according to the second embodiment of the present invention. The multiprocessing heading machine of the second embodiment sequentially performs the 7-step heading forming on the workpiece by a combination of 7 sets of dies and punches. The multi-process heading machine is composed of a base portion 2X, seven sets of die blocks 3X and a die, a ram 5X, seven sets of punch blocks 6X, a punch, a drive motor 8X, and the like.

The base portion 2X is a box-shaped housing for arranging the respective portions, and is formed firmly. On the left side of the base portion 2X, a back plate 9 extending in the width direction is provided. The die block 3X is divided into seven die units and is arranged in the width direction of the base portion 2 and fixed to the back plate 9. [ The seven dies are replaceably mounted on the front (left side in the figure) of each die block 3X, and a predetermined machining die is formed on the entire surface facing the left side in the drawing.

The ram 5X is held substantially in the center of the base portion 2 so as to be capable of reciprocating in the longitudinal direction (left and right direction in the figure) with respect to the base portion 2. [ The punch block 6X is divided into seven punch units and is arranged and fixed in the width direction at the front position of the ram 5X (the right position of the paper in Fig. 8). The seven punches are replaceably mounted on the front (right side in the figure) of each punch block 6X, and a predetermined machining mold is formed on the entire surface facing the right side in the figure.

The seven sets of dies and punches are set to face each other with a common axial center. When the ram 5X is driven after the workpiece is mounted on each die, the punch is driven to the right in the drawing to pressurize the workpiece So that the head forming process is performed. Of the sets of dies and punches (set of die block 3X and punch block 6X), the upper side in the figure is the upstream process and the lower side in the figure is the downstream process.

A drive motor 8X is disposed at one end in the longitudinal direction of the base portion 2X and at the other end in the longitudinal direction of the base portion 2 A rotating table 100 and a calibration mechanism 101 constituting a supply unit are disposed. The drive force of the drive motor 8X is transmitted to each part via a power transmission shaft, a gear, and a cam mechanism (not shown). By this driving force, the ram 5X is reciprocally driven with respect to the base portion 2X. A part of the driving force is transmitted to the wire rod cutting and supplying section, and the workpiece is cut from the long wire rod. Further, a part of the driving force is transmitted to the transfer section, and the workpiece is transferred from the wire material cutting and feeding section to the uppermost die and punch, and further transferred to the downstream side.

Next, the mounting structure of the die block 3X to the base portion 2 will be described in detail. 9A is a front view of the back plate 9 on the side of the base for mounting and fixing the seven die blocks 3X. Fig. 9B is a right side view of the back plate 9. Fig. The die blocks 3X indicated by broken lines in Fig. 9B are arranged and fixed in the width direction of the front face of the back plate 9. Fig. In Fig. 9A, the central vertical planes C1 to C7 in the width direction of the regularly fixed positions of the respective die blocks 3X and the common central horizontal plane CV in the vertical direction are shown.

Two lateral reference members 91 and 92 and upper and lower reference members 93 (vertically spaced apart from each other) corresponding to the regular fixing positions of the respective die blocks 3X Hatching display) is projected forward. The right lateral reference planes 911 and 921 of the lateral reference members 91 and 92 are superimposed on the central vertical planes C1 to C7. Upper and lower reference surfaces 931 on the upper side of the upper and lower reference member 93 are superimposed on the central horizontal surface CV.

On the other hand, on the die block 3X side, there are formed a reference surface contacting with the lateral reference surfaces 911 and 921 from the right side and a reference surface contacting with the upper and lower reference surfaces 931 from above. Therefore, when the die block 3X is pressed from the upper side downward while being pressed from the right side to the left side in Fig. 9A by using a lateral clamping mechanism and a vertically clamping mechanism (not shown), accurate positioning can be performed. That is, the reference surface of the die block 3X is positioned and fixed in the state of being in contact with the lateral reference surfaces 911, 921 and the upper and lower reference surfaces 931 of the back plate 9. At this time, the axis center of the die mounted at the center of the die block 3X coincides with the center line where the central vertical planes (C1 to C7) intersect with the central horizontal plane (CV).

As a result, even if the individual die block 3X thermally expands, the axis of the die is not displaced at all, or even if it is displaced, because the die center 3X spreads around the center vertical faces C1 to C7 and the center horizontal face CV, It is a little. The fixing method based on the central vertical planes C1 to C7 and the center horizontal plane CV is also adopted in the punch block 6X so that the axial center of the punch is not displaced at all or even if it is displaced very little. Therefore, in the second embodiment, the centering defect between the die and the punch can be reliably reduced, and a very high heading accuracy can be ensured.

The present invention relates to a transfer type multi-step heading machine for transferring and delivering a work piece to and from each step of the transfer part, a sequential transfer method for separating the product at the end by progressing a plurality of steps of press- And the like.

1, 1X: Multi process heading machine
2, 2X: base portion
21: back plate
22: pulling clamp mechanism
24: clamp member
28: transverse direction reference member
29: Upper and lower reference member
2A: Horizontal clamping mechanism
2B: Actuator (operator)
2C: Delivery load
2D: Belt link member
2E: coil spring (elastic member)
2K: Up and down clamping mechanism
2L: Belt link member
2M: pressing member
2N: Actuator (Operator)
3, 3X: die block
31: Die mounting hole
34: Handle
35: engaging member
36: Slide groove
38: lateral reference plane
3A: Upper and lower reference plane
4: Die
5, 5X: RAM
6, 6X: Punch block
7: Punch
8:
8X: drive motor
9: Back plate
91, 92: transverse direction reference member
93: Upper and lower reference member
C1 to C7: central vertical plane
CV: Center horizontal plane

Claims (4)

A base block, a die block detachably mounted on the base block, a plurality of dies interchangeably mounted on the die block, a ram reciprocally driven in the longitudinal direction of the base portion, a punch block detachably mounted on the ram, A plurality of punches which are replaceably mounted on the punch block and are pressed against the workpiece to advance the head of each process by aligning the die and the axis, and a driving unit for driving the ram,
The die blocks are divided into die units and are arranged so as to be spaced apart from each other in the width direction of the base portion. Further, each of the divided die blocks is formed in a lateral reference surface formed in the vicinity of the center in the width direction and in the vicinity of the center in the vertical direction And an upper and lower reference surface,
Wherein the base portion includes a plurality of lateral direction reference members to which the lateral direction reference surfaces of the respective die blocks contact, and a plurality of lateral direction reference members which are fixedly spaced apart from each other in the width direction in a state in which the lateral direction reference surface is in contact with the lateral direction reference member A plurality of upper and lower reference members in contact with the upper and lower reference planes of the die blocks, and a vertical clamp mechanism for vertically fixing the respective die blocks in a state in which the upper and lower reference surfaces are in contact with the upper and lower reference members, Respectively,
The punch block is divided into the punch units and arranged to be spaced apart from each other in the width direction of the ram, and each of the divided punch blocks is formed in a lateral reference plane formed in the vicinity of the center in the width direction and in the vicinity of the center in the vertical direction And an upper and lower reference surface,
Wherein the ram includes a plurality of lateral direction reference members to which the lateral reference planes of the respective punch blocks contact, and a plurality of lateral reference members which are fixedly spaced apart from each other in the width direction in a state in which the lateral direction reference surface is in contact with the lateral direction reference member A plurality of upper and lower reference members to which the upper and lower reference surfaces of the punch blocks come into contact and upper and lower clamping mechanisms for fixing the punch blocks in the vertical direction in a state in which the upper and lower reference surfaces are in contact with the upper and lower reference members, Multi-process heading machine. The method according to claim 1,
At least one of the transverse clamping mechanism of the base portion and the transverse clamping mechanism of the ram is a multi-processing heading machine for fixing all die blocks and / or all punch blocks in the width direction by a connection clamping mechanism driven by a common operation source . 3. The method of claim 2,
Wherein the connection clamp mechanism comprises a transmission rod for transmitting the operation force of the operation source to the next process in sequence, a bell link member which is driven by the transmission rod and swings to press each of the die blocks or each of the punch blocks, And an elastic member that resists the link member. 4. The method according to any one of claims 1 to 3,
Wherein at least one of the die block and the punch block has an engaging member which is mutually displaceably connected between the blocks.

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