JP3203522B2 - Transfer press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer press for pressing a product having a predetermined shape through a plurality of continuous steps.

[0002]

2. Description of the Related Art In a conventional transfer press, dies composed of upper dies and lower dies corresponding to a plurality of continuous processing steps are arranged at predetermined intervals along a material feeding direction. ing. The initial material sent by means known to those skilled in the art is located at the first processing position. Next, a first press working is performed by a corresponding first mold. This material is then caught by the fingers and sent to the next step, the second processing position, where it is positioned. The next material is positioned at the first processing position. The first press working by the first mold,
The second press working is simultaneously performed by the second mold, respectively. In this way, the material is finished into a predetermined product through a plurality of processing steps.

[0003]

However, the conventional transfer press described above has the following problems to be solved. (1) The material is sent to each processing step by a finger mechanism. Thus, as is well known to those skilled in the art,
The material feeding mechanism and its control become very complicated. (2) There are provided a number of upper and lower dies corresponding to a plurality of processing steps, which are individually mounted on a moving body or a fixed body by bolts. Therefore, when the form of the product to be processed is different, or in maintenance or the like, the molds must be replaced individually by operating bolts. As a result, the work of exchanging the mold becomes complicated, the burden on the operator is great, and the time required for exchanging the mold becomes extremely long. Since the time required for exchanging the dies becomes extremely long, it takes a long time especially when processing a large variety of small quantities of products, and the operation efficiency is extremely poor. (3) Since the configuration of the mold itself is complicated and its processing is difficult, the cost of the mold is high. (4) The entire transfer press becomes complicated and expensive.

The main object of the present invention is therefore to greatly simplify the material feeding mechanism and its control,
By providing an improved transfer press, the mold changing operation can be performed extremely easily, and as a result, the cost can be significantly reduced and the time required for changing the mold can be significantly reduced. is there.

Other objects of the present invention will become apparent from the following description of embodiments of a transfer press constructed according to the present invention, which will be described in detail with reference to the accompanying drawings.

[0006]

According to the present invention, there is provided, according to the present invention, an upper die and a lower die for processing a material, wherein the lower die is arranged along a moving direction of the material. A plurality of dies, a plurality of through-holes provided in a transfer plate disposed on an upper surface of each of the dies, and a processing hole provided in each of the dies, synchronized with rotation of a crankshaft. A knockout member provided so as to be able to move up and down at a predetermined timing, wherein the upper die is moved up and down by the crankshaft and positioned at an upper position corresponding to each of the processing holes, and the transfer plate is The transfer plate is configured to be able to reciprocate at a predetermined timing synchronized with the rotation of the crankshaft between the processing position and the pre-process position, and the transfer plate is positioned at the processing position and the pre-process position. When each of the through-holes is positioned coaxially with the corresponding processing hole of each of the dies, each of the knockout members is raised after the transfer plate is positioned at the pre-process position. Each of its upper surfaces is positioned substantially flush with the upper surface of each of the dies, and then the transfer plate is moved to the processing position to position the upper surface of each of the knockout members. A transfer press, wherein each of the materials to be transferred is transferred to the processing position.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a transfer press improved according to the present invention.

Referring to FIGS. 1 to 4, a transfer press improved according to the present invention includes an upper die and a lower die for processing a material 2. The lower die includes a plurality of dies 4 arranged along a material feeding direction (from left to right in FIG. 1) and a plurality of dies 4 provided on a transfer plate 6 arranged on the upper surface 5 of each of the dies 4. Through hole 8
(See also FIG. 5 and FIG. 6) and a knockout provided so as to be able to move up and down in a machining hole 10 provided in each of the dies 4 at a predetermined timing synchronized with the rotation of the crankshaft 11 (see FIG. 7). And a member 12.

The main body frame 14 includes a die holder 16.
Are fixed via a die holder clamp 18.
The bolster plate 2 is located below the die holder 16.
0 is fixedly arranged. Each of the dies 4 is supported by protruding from the upper surface of the die holder 16 by partially fitting into an annular support recess 22 formed on the upper surface of the die holder 16. An annular groove 24 is formed on the outer peripheral surface of each of the dies 4, and each of the annular grooves 24 is positioned at a position protruding from the upper surface of the die holder 16. As is apparent from FIG. 4, a plurality of support keys 26 are arranged on the upper surface of the die holder 16 so as to extend in a tangential direction so as to be able to be inserted into and removed from each of the annular grooves 24. Both ends of each of the support keys 26
Key guide 2 orthogonally arranged to each of support keys 26
8 on the upper surface of the die holder 16 via the bolt 3
0 (see FIG. 3). Key guide 28
On the lower surface orthogonal to the support key 26 at both ends of the
A guide groove 32 into which the support key 26 fits is formed.

Therefore, when the bolt 30 is loosened, each support key 26 can be pulled out from each annular groove 24 along the guide groove 32. Thereby, each die 4 can be easily removed from the annular support recess 22 of the die holder 16. The end on the extraction side of each support key 26 projects a predetermined length from the side surface of the key guide 28 so as to be pinched by a finger. When each die 4 is mounted in each annular support recess 22 of the die holder 16, each support key 26
Is inserted from one side of each guide groove 32 to the other side,
Since each support key 26 fits in each annular groove 24, the key guide 28 may be fastened to the die holder 16 with a bolt 30. By the simple operation described above, each die 4 is securely mounted on the die holder 16. Although not shown, it is preferable to provide a stop means (positioning means) when each support key 26 is inserted from one side of each guide groove 32 to the other side. In addition, each support key 2
If one end of the support key 6 is fixed by a connecting member (not shown) orthogonal to the one end, all the support keys 26 can be inserted and removed at once using the connecting member. 1 and 4 is a holder of the proximity sensor 36 (see FIG. 1), which is arranged above the plurality of support keys 26 at a predetermined interval.

Referring to FIG. 1, FIG. 3 and FIG.
Are formed in a circular shape except for those located at the left end in FIGS. 1 and 4. The upper part of the die 4 located at the left end has a rectangular shape when viewed from a plane. The processing hole 10 of the die 4 at the left end is formed by a ring member 40 mounted at the center thereof. A rectangular support member 38 having the same rectangular shape as viewed from above is attached to the rectangular upper surface 5 of the die 4. The support member 38 is formed in a channel shape, and the transfer plate 6 is movably positioned in a rectangular space formed between the support member 38 and the rectangular upper surface 5. Ring-shaped dies 42 and 44 are attached to the center of the support member 38 in a superimposed manner. The dies 42 and 44 are formed with the processing holes 13 coaxial with the processing holes 10, respectively. Dies 42 and 4
4, a groove 46 (see FIG. 1) is formed in which the band-shaped material 2 having a predetermined width can move.

Referring to FIGS. 1 and 2, each of knockout members 12 includes a knockout 50, a knockout spacer 52, and a knockout pin 54, which are arranged so as to overlap from above in this order. The knockout 50 located at the uppermost part is vertically movably fitted into a guide hole formed below the processing hole 10 of the die 4,
The upper end is positioned so as to move up and down in the processing hole 10 of the die 4. The knockout spacer 52 located at the intermediate portion is fitted in a guide hole formed in the die holder 16 so as to be vertically movable. The outer peripheral portions of knockout 50 and knockout spacer 52 are circular. The knockout pin 54 located at the lowest position is fitted in a guide hole formed in the bolster plate 20 so as to be vertically movable. Each of these guide holes is formed coaxially, so that each of the knockout 50, the knockout spacer 52, and the knockout pin 54 are coaxially positioned. At a portion of the bolster plate 20 corresponding to a lower portion of the knockout pin 54, a cutout portion 56 having a right angle is formed as shown in FIG. Therefore, the lower part of the knockout pin 54 is
0 protrudes downward from the guide hole. At the lower end of each of the knockout pins 54, a pair of notches 58 extending in parallel along the axial direction are formed. The outer peripheral portion of each knockout pin 54 is circular except for the notch 58.

Referring to FIGS. 9 and 10, a shaft 60 is rotatably supported by the main body frame 14. Axis 6
At 0, the same number of knockout levers 62 as the knockout members 12 are supported. Each knockout lever 62
Have substantially the same configuration, and only one of them will be described. The knockout lever 62 is provided with the key 6 on the shaft 60.
4 and the mounting position is defined. One end of the knockout lever 62 is shown in FIGS.
The knockout lever 62 is securely attached to the shaft 60 by tightening the divided portion with a bolt. The other end of knockout lever 62 is formed in a fork shape. This fork portion is engaged with a pair of notches 58 of the corresponding knockout pin 54. A step 59 is formed at the upper end of the notch 58. The end of the shaft 60 is
A lever 66 is attached to the cam housing 65 formed at the end of the cam housing 65 by the same means as the knockout lever 62. One end of the lever 66 is associated so as to reciprocate by a cam provided at the end of the crankshaft 11, which will be described later in detail.

Referring to FIG. 2, bolster plate 20
Is formed with a hole 68 that has one end open to the side and the other end to each of the guide holes of the knockout pin 54. A knockout brake 70, a spring 72, and a retainer screw 74 are inserted into each of the holes 68, respectively. As a result, the knockout brake 70 is
2 presses against the side of the knockout pin 54. The knockout brake 70 is used to prevent galling.
In this example, phosphor bronze is used. When the fork portion of the knockout lever 62 moves upward by the rotation of the shaft 60, the knockout pin 54, the knockout spacer 52, and the knockout 50 simultaneously move upward by a predetermined stroke. When the fork portion of the knockout lever 62 moves downward, the fork portion of the knockout lever 62 moves downward along the notch 58 of the knockout pin 54 and separates from the step portion 59 at a predetermined distance. This is because the knockout pin 54, the knockout spacer 52, and the knockout 50 are held at the raised position by the friction of the knockout brake 70 when no external force is applied.

Referring to FIGS. 5 and 6, the transfer plate 6 has a rectangular shape when viewed from above. Each of the through holes 8 of the transfer plate 6 is constituted by a transfer ring 78 detachably mounted (press-fitted) in a mounting hole 76 formed in the transfer plate 6. The transfer ring 78 has a flange portion formed at one end in the axial direction, and has an inner peripheral portion and an outer peripheral portion formed in a circular shape. The number of the through holes 8, that is, the number of the transfer rings 78 is, for example, 6 in the case of the number of the dies 4 (the number of processing steps is 6) and one transport hole for sending out the final processed material. Are provided.

At one end of the transfer plate 6,
A feed end 80 is provided. The sending end 80
A bracket 82 attached to one end of the transfer plate 6 and a bolt 84 engaged with the bracket 82
It is composed of The axial position of the bolt 84 is adjustable. The head of the bolt 84 is
It is associated with a cam provided at the end of the crankshaft 11 via a lever provided therein, but details thereof will be described later. Although not shown, a return end is provided at the other end of the transfer plate 6. The return end is also formed by a bolt that can be adjusted in the axial direction. A cylinder end bracket 86 is attached to the center of the upper surface of one end of the transfer plate 6. A central portion of the cylinder end bracket 86 has a channel shape opened toward one end of the transfer plate 6, and a through hole is formed in the channel portion in a vertical direction, and a pin 88 is inserted into the through hole. I have. An annular groove 90 is formed at the tip of the headed pin 88. A screw hole is formed at the bottom of the cylinder end bracket 86 such that one end is opened on one side surface of the cylinder end bracket 86 and the other end is opened in a through hole. A ball plunger 92 is engaged with the screw hole. When the pin 88 is inserted into the through hole, the ball plunger 92 engages with the annular groove 90. As a result, the pin 88 is held by the cylinder end bracket 86 so as to be freely extracted. The pin 88 is connected to an air cylinder disposed in the cam housing 64, which will be described later.

Referring again to FIGS. 1 to 3, the upper die is moved up and down by a crankshaft 11 and is positioned at an upper position corresponding to each of the processing holes 10. Specifically, the crankshaft 11 is connected to an upper crosshead means 94 as a moving body. The upper crosshead means 94 comprises an upper crosshead 96 in this example.
And a punch plate base 98 attached to the lower surface thereof
And The connection between the upper crosshead 96 and the crankshaft 11 is well known and will be described briefly here without being illustrated. That is, four guide holes are provided in the main body frame 14 in the vertical direction (two of them are shown in FIG. 9), and guide rods are fitted into these guide holes so as to be vertically movable. ing. An upper cross head 96 is attached to the upper end of each guide rod, and an under cross head is attached to the lower end. The undercross head is connected to the crankshaft 11 via the connecting rod.
Is linked to Therefore, when the crankshaft 11 rotates, the upper crosshead 96 is moved up and down along each guide hole together with each guide rod.

A punch plate 100 is mounted on a lower surface of the punch plate base 98. Each upper mold is
In this example, a punch shank 102 is included. A support hole 104 for supporting each punch shank 102 is formed in the punch plate 100. At the position where each support hole 104 is formed, the tangential direction of each support hole 104 extends from one side of the punch plate 100 toward the other side.
Two mutually parallel key holes 106 are formed. Each key hole 106 is formed so as to extend by notching a part of the inner peripheral surface of each support hole 104. At the upper end of each punch shank 102, a support portion 108 that can fit into the support hole 104 is formed. An annular groove 110 is formed on the outer peripheral surface of each support portion 108. When the support portion 108 of each punch shank 102 is fitted in the support hole 104, a part of each annular groove 110 is
Are positioned to form a part of. Each of the punch shanks 102 is detachably attached to the punch plate 100 by inserting the support pin 112 with a head into each of the key holes 106 and holding the insertion position so as to be able to be pulled out by the holding means 113.

The holding means 113 has one end opened on one surface of the punch plate 100 and the other end provided with each key hole 106.
Screw holes formed in the punch plate 100 so as to open to the holes, and a ball plunger 114 engaged with each screw hole.
And an annular groove 116 formed at a predetermined position of each support pin 112. When each support pin 112 is inserted into each key hole 106, the ball plunger 114 is configured to engage with the annular groove 116 of each support pin 112. Ball plunger 1 not shown in detail
Numeral 14 is a member well known to those skilled in the art, and has a hole formed at its axial center with one end open and the other end closed. A spring is inserted into this hole, and is held by being biased by a spring so that the ball does not come out of the opened end and a part of the ball projects in the axial direction. The other end of the ball plunger 114 has a hexagonal hole (recess)
Are formed. Therefore, when the ball of the ball plunger 114 is engaged with the annular groove 116 of the support pin 112, the support pin 112 is automatically held at a predetermined insertion position of the key hole 106. Further, it is easy to pull out the support pin 112 in the axial direction.

At the lower end of each punch shank 102, a punch is provided integrally with or separately from the punch shank 102. In the example of FIG. 1, the punch shank 102 at the left end
Is provided with a punch 118 integrally therewith. The next three punch shanks 102 are provided with punches 118 separately therefrom. Each of the separate punches 118 has a different shape depending on the shape to be machined, but each of them is detachably attached to the lower end of the punch shank 102 by a bolt through an attachment hole formed at the center thereof. The outer peripheral portion of each punch shank 102 is formed in a circular shape. Further, the outer peripheral portion and the inner peripheral portion of the punch 118 are formed in a circular shape.

A stripper sleeve 120 is fitted to at least a part (two in FIG. 1) of each of the punch shanks 102 so as to be movable in a predetermined range in the axial direction. The lower end of the stripper sleeve 120 is fitted to the outer periphery of the punch 118 and is constantly urged downward by an urging means provided on the upper crosshead 96.

The attachment of the stripper sleeve 120 will be described with reference to FIG. A support rod 122 is screwed to the upper cross head 96. Support rod 1
Retainers 124 and 126 are fitted to 22.
The upper position of the retainer 124 is regulated by a nut 123 screwed to the support rod 122, and the retainer 12
6 is regulated by the upper surface of the upper cross head 96. Between the retainers 124 and 126,
A spring 128 has been inserted. A plurality of, for example, four rods 130 are attached to the retainer 126 located below. Each rod 130 is vertically movably fitted into a through hole formed in the upper crosshead 96. At the lower end of each rod 130 is another rod 13 with a head.
The upper ends of 2 are in contact. The other rods 132 are respectively a punch plate base 98 and a punch plate 10.
0 so that it can be freely moved up and down in another through-hole formed in
Their lower ends project downward from the punch plate 100 and are in contact with the upper surface of the stripper sleeve 120.
Since the outer diameter of the punch 118 is formed larger than the outer diameter of the lower end of the punch shank 102, the lower position of the stripper sleeve 120 is regulated by the upper end of the punch 118. Thus, when upper crosshead 96 moves, for example, to the uppermost position, stripper sleeve 120
Is connected to the rod 130 and the other rod 1 by the spring 128.
It is urged to the lowermost position via 32. The outer peripheral portion and the inner peripheral portion of the stripper sleeve 120 are formed in a circular shape. At the time of processing to be described later, the stripper sleeve 12
Reference numeral 0 is configured to movably fit into the through hole 8 of the transfer plate 6.

Next, a cam mechanism for operating the transfer plate 6 and the knockout member 12 will be described with reference to FIG.
This will be described with reference to FIG. An end cam 134 is attached to an end of the crankshaft 11 protruding into the cam housing 65. A plate cam 136 is attached to the back side of the end cam 134. In the cam housing 65, a shaft 138 is rotatably supported on both sides thereof. One end of each of two levers 140 and 142 is integrally attached to the shaft 138 by a key. The lever 140 is attached downward and the lever 142 is attached upward. A roller 144 as a cam follower is rotatably provided at the other end of the lever 140. A roller 146 is rotatably provided at the other end of the lever 142. An air cylinder 148 is mounted at an upper position in the cam housing 65. The end of the piston rod 150 of the air cylinder 148 is connected to the transfer plate 6. That is, a connecting portion having a through hole is provided at the end of the piston rod 150, and this through hole is positioned at the center of the cylinder end bracket 86 of the transfer plate 6, and the pin 88 is inserted. Be linked. The air cylinder 148 is connected to an air source (not shown), and acts to pull the transfer plate 6 in the direction of the arrow in FIG. For this reason, the head of the bolt 84 attached to the feed end 80 of the transfer plate 6 is attached to the roller 146 of the lever 142.
, And the roller 144 of the lever 140 is pressed against the cam face 135 of the end cam 134.

With the above configuration, when the crankshaft 11 rotates, the lever 142 is reciprocated between the solid line position and the two-dot chain line position by the action of the end cam 134. Thereby, the transfer plate 6 is reciprocated between the machining position and the pre-process position at a predetermined timing synchronized with the rotation of the crankshaft 11. The direction of movement is the left-right direction in FIGS. 7 and 1, and FIGS. 7 and 1 show the processing position. When the transfer plate 6 moves one step to the left, it becomes the pre-process position.

In the cam housing 65, another rotating shaft 1 is provided.
One end of a lever 154 is integrally attached to 52. The other end of the lever 154 is connected to one end of the lever 60 via a connecting rod 156. A roller 158 that is a cam follower is rotatably provided on the lever 154. Another air cylinder 160 is mounted in the cam housing 65. The end of the piston rod 162 of the air cylinder 160 is
4 is positioned so as to abut on the side. The air cylinder 160 is connected to an air source (not shown), and acts to rotate the lever 154 in the clockwise direction (the arrow direction) in FIG. 8 via the piston rod 162 when the press is operated. Therefore, the roller 158 of the lever 154 is pressed against the cam face 137 of the plate cam 136. With the above configuration, when the crankshaft 11 rotates, the plate cam 136
The lever 66 reciprocates between the solid line position and the two-dot chain line position in FIG.
Is moved up and down at a predetermined timing synchronized with the rotation of the crankshaft 11.

Referring to FIG. 9, when the transfer plate 6 is positioned at the processing position and the pre-process position, each of the through holes 8 corresponds to the corresponding processing hole 8 of each of the dies 4.
The movement stroke is defined so as to be positioned coaxially with. Of course, even if the through hole 8 located at the left end in FIG. 1 is positioned at the pre-process position, there is no corresponding processing hole 8, so this case is excluded.

After the transfer plate 6 has been positioned in the pre-process position, each of the knockout members 12 is raised so that its upper surface, ie, each of the upper surfaces of the knockouts 50, is substantially flush with the upper surface of each of the dies 4. It is positioned in. Next, as the transfer plate 6 moves to the processing position, each material located on the upper surface of each knockout member 12 is transferred to the processing position while being held in the through hole 8 of the transfer plate 6. As described above, the movement stroke and operation timing of each of the transfer plate 6 and the knockout member 12 are defined.

Next, the operation of the transfer press will be described with reference to FIGS. FIG. 1 shows a state in which the crankshaft 11 is at the bottom dead center position (therefore, the upper die is at the lowest position) and press working has been performed in each lowering step. That is, FIG. 1 shows a first processing step from the left, up to the second, third, and fourth processing steps.

In the first processing step, the belt-shaped material 2
Through a groove 46 between the dies 42 and 44, for example, from left to right in FIG. 3 and from front to back in FIG. 1, by an intermittent feed mechanism known to those skilled in the art. The material 2 is first punched in dies 42 and 44 by means of a punch 118 formed integrally with the punch shank 102, and is then formed secondarily by the die 4. In the first processing step, the material 2 is stamped into a disk shape.

In a second processing step, which is the second step from the left in FIG. 1, the disk-shaped material 2 formed in the first processing step is squeezed in a die 4 into a dish shape.

In the third processing step, which is the third step from the left in FIG. 1, the end of the dish-shaped material 2 formed in the second processing step is cut into a ring shape.
The portion cut into a ring shape is configured to rise together with the punch 118 while being attached thereto, to be dropped into a trapping chamber 119 provided above the punch 118, and to be forcibly discharged by air at the same time. I have.

In the fourth processing step, which is the fourth step from the left in FIG. 1, the dish-shaped material 2 whose end has been cut in the third processing step is squeezed into a shallow cup shape. The material 2 is sent out from a transport hole (not shown) after the following two processing steps, but the description is omitted.

The forming processing in the above-described processing steps is performed substantially simultaneously in synchronization with the rotation of the crankshaft 11.
In each processing step, the knockout members 12 located on the lower surface of the molded material 2 are moved downward according to the respective processing strokes, and are held at the respective positions by the friction of the knockout brake 70 described above. As will be described later, the fork portion of the knockout lever 62 has already been positioned at a predetermined distance below the step portion 59 of the notch 58 of the knockout pin 54 at this time.

When the crankshaft 11 is raised toward the top dead center, each punch 118 is moved together with the upper cross head 96.
Moves upward. During this time, in the processing step where the material 2 is difficult to separate from the punch 118, the stripper sleeve 1
20 acts to strip material 2 from punch 118. Each of the punches 118 is provided with the molded material 2
It does not project from the upper surface of the die 4 and moves upward leaving the upper surface of the knockout 50. After each punch 118 is pulled out of the through hole 8 of the transfer plate 6, the transfer plate 6 is moved to the left from the processing position in FIG. 1, stops at a pre-process position (not shown), and is held at that position. You. The first through hole 8 from the left is located at the left position in the first processing step. The second through hole 8 from the left is positioned coaxially with the processing hole 10 of the die 4 in the first processing step. The third through hole 8 from the left is positioned coaxially with the processing hole 10 in the second processing step. The fourth through hole 8 from the left is positioned coaxially with the processing hole 10 in the third processing step. The middle part is omitted below, and the seventh through-hole 8 from the left (not shown) is positioned coaxially with the processing hole 10 in the sixth processing step (not shown).

Each knockout lever 62 raises each knockout 50 so that each of its upper surfaces is positioned substantially flush with the upper surface of each of the dies 4. Each material 2 is located on the upper surface of a respective knockout 50. In this state, each material 2 is positioned in each through hole 8 of the transfer plate 6 that has moved to the pre-process position. The crankshaft starts to descend. Next, the transfer plate 6 is moved from the pre-process position to the illustrated processing position. The transfer plate 6 is moved rightward from the previous process position, stops at the illustrated processing position, and is held at that position. Transfer plate 6
Each of the through holes 8 is formed with a corresponding one of the processing holes 1 of the die 4.
It is positioned coaxially with 0. In the process in which the transfer plate 6 moves from the pre-process position to the illustrated processing position, the material 2 located on the upper surface of each knockout 50
Are held in the through holes 8 of the transfer plate 6 and are automatically transferred to the processing positions on the downstream side by one step. Although not shown, at the right end position,
A transport hole for dropping and transporting the material 2 that has undergone the final processing step is provided. The transport hole is formed in a die-shaped member having the same upper surface as the upper surface of the die 4. Therefore, when the transfer plate 6 moves from the previous process position to the processing position, the material 2 at the final processing position (sixth processing position) is moved onto the transport hole by the through hole 8 of the transfer plate 6, and automatically. Is dropped and transported.

The crankshaft 11 is further lowered, and first, the punch 118 in the first machining step punches out the material 2 located in the groove 46 between the dice 42 and the dice 44. Then, as each punch 118 enters the corresponding through hole 8 of the transfer plate 6, each knockout lever 62 starts to descend almost simultaneously. Processing is started between the punch 118 and the die 4 in the order according to the processing stroke of each material 2. When the crankshaft 11 descends to the bottom dead center position,
The state shown in FIG. 1 is obtained again, and each of the materials 2 has been processed in a state of being advanced one step at a time. Before the crankshaft 11 reaches the bottom dead center position, each knockout lever 62 has finished descending to the lowest position. In each processing step, the processing stroke of the punch 118 downward from the upper surface of the die 4 is different as shown in the drawing.
In the state of FIG. 1, a gap is formed between each knockout lever 62 and the stepped portion 59 of each knockout pin 54 in accordance with each processing stroke difference.

As is clear from the above description, the material 2 in each processing step is moved to the downstream side by one step in association with the movement of the transfer plate 6 for each rotation of the crankshaft 11, and Processing is performed at the same time. The operation of the entire press is as described above. Next, the relationship between the operation timings of the crankshaft 11, the knockout member 12, and the transfer plate 6 will be described with reference to the fourth processing step from the left in FIG. 1 as an example. 1 and FIG. 11 will be described in detail. In FIG. 11, reference numeral 11 denotes a crankshaft, 12 denotes a knockout member, and 6 denotes an operation of a transfer plate. The horizontal axis represents the crank angle, which is common to all. The vertical axis represents a stroke between the bottom dead center and the top dead center in the crankshaft 11,
x indicates the maximum value. In the knockout member 12, the lift amount between the lowermost position and the uppermost position is represented,
y indicates the maximum value. In the transfer plate 6, a stroke between the processing position and the pre-process position is represented, and z indicates its maximum value.

At a point 12a at which the crankshaft 11 passes about 20 degrees from the top dead center, the knockout member 12 stops lifting (lift operation) and is positioned at the uppermost position. Knockout member 12 (knockout 50)
Is positioned on the same plane as the upper surface of the die 4. The material 2 located on the upper surface of the knockout member 12 is located in the through hole 8 of the transfer plate 6 on the same plane as the upper surface of the die. At the same timing as point 6a, the transfer plate 6 starts moving from the previous process position to the processing position.

At a point 6b where the crankshaft 11 is about 110 degrees from the top dead center, the transfer plate 6
Ends the movement from the previous process position to the processing position. 4th
The material 2 that has passed through the third processing step, which is the previous step, is transferred onto the die 4 in the processing step. The material 2 located on the die 4 in the fourth processing step is transferred onto the die 4 in the next step. At a point 12b at the same timing, the knockout lever 62 of the knockout member 12 starts descending, and the crankshaft 11 is positioned at the lowermost position, that is, the lift amount zero position at a point 12c about 150 degrees after the top dead center. Can be At the point 12b, the knockout member 12
Despite the drop of 2, the knockout brake 70 keeps the uppermost position. Therefore, at the point 12c, a gap is formed between the knockout lever 62 and the step portion 59 of the notch 58 of the knockout pin 54.

At a point 11a after the crankshaft 11 has finished moving the transfer plate 6 from the pre-process position to the processing position, the punch 118 starts to enter the through hole 8 of the transfer plate 6. Further, the drawing of the material 2 is started at a point 11b which is about 140 degrees after the top dead center, and the drawing is ended at a point 11c which is a bottom dead center. The material 2 is lowered by the punch 118 from the upper surface of the die 4 by a predetermined working stroke during a period from the point 11b where the drawing is performed to the point 11c. Accordingly, knockout member 12 is also lowered by the same stroke. Such a movement of the knockout member 12 corresponds to the point 12b in FIG.
It is indicated by a dotted line passing through 12e and 12f. Therefore, a solid line passing through the points 12b and 12c indicates the movement of the knockout lever 62. The difference between the dotted line and the solid line is the difference between the knockout lever 62 and the step 59 of the knockout pin 54 described above.
And the gap between them.

When the crankshaft 11 passes the bottom dead center 11c and reaches a point 11d (about 250 degrees from the top dead center),
The punch 118 comes out of the through hole 8 of the transfer plate 6. At the subsequent point 6c, the transfer plate 6 starts moving from the machining position to the preceding process position, and ends the movement at the point 6d where the crankshaft 11 has passed about 340 degrees from the top dead center. Since the material 2 is supported on the upper surface of the knockout member 12 at a position lower than the upper surface of the die 4 by a predetermined stroke, the material 2 does not move due to the movement of the transfer plate 6. At a point 12d at the same timing, the knockout lever 62 starts to rise, and when it rises by the gap, it comes into contact with the step portion 59.
This is the point 12g. From the point 12g to the point 12a, the knockout member 12 is lifted up by the knockout lever 62 as shown by a solid line, and is held at the uppermost position. When the crankshaft 11 makes one rotation, the above operation is repeated.

As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above embodiments, and various changes or modifications can be made within the scope of the present invention. is there.

[0043]

According to the present invention described above based on one embodiment, the following effects can be obtained. (1) Since the material is sent to each processing step automatically by moving the transfer plate, the material feeding mechanism and its control are significantly simplified. Therefore, the cost of the material feeding mechanism and its control can be significantly reduced. (2) The upper die is configured to be attached / detached by an operation of inserting / removing a support pin into / from a key hole. On the other hand, the lower die is configured to be attached and detached by an operation of attaching and detaching a key guide and an operation of inserting and removing a support pin from an annular groove.
Therefore, the work of replacing the mold is facilitated, the burden on the operator is greatly reduced, and the time required for replacement is significantly reduced. Since the time required for changing the mold is significantly reduced, the operation efficiency is improved remarkably, particularly when a large variety of small products are processed. (3) The outer periphery and / or the inner periphery of the upper mold and the lower mold are formed in a circular shape. Therefore, the configuration of the mold is simplified, and machining on a lathe becomes possible, so that machining is facilitated and the cost of the mold is significantly reduced. (4) a punch and stripper sleeve in the upper mold;
The product can be changed only by exchanging five components such as a transfer ring, a die and a knockout member in the lower die. Therefore, also in this aspect, the operation efficiency in the case of processing a variety of small quantities of products is significantly improved. (5) The entire transfer press is simplified and can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a part of one embodiment of a transfer press improved according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a partial view of a die portion viewed from above.

FIG. 5 is a top view showing a part of the transfer plate.

FIG. 6 is a sectional view taken along the line CC of FIG. 5;

FIG. 7 is a longitudinal sectional view of a cam and a cam follower portion.

8 is a sectional view taken along the line DD in FIG. 7;

FIG. 9 is a sectional view taken along the line EE of FIG. 7;

FIG. 10 is a view of the lever portion of FIG. 9 as viewed from above.

FIG. 11 is a diagram showing an operation timing of a member operated by a cam.

[Explanation of symbols]

 2 Material 4 Dice 6 Transfer Plate 8 Through Hole 10 Working Hole 11 Crankshaft 12 Knockout Member 16 Die Holder 24 Annular Groove 26 Support Key 28 Key Guide 50 Knockout 52 Knockout Spacer 54 Knockout Pin 58 Notch 59 Step 62 Knockout Lever 70 Knockout 78 Transfer ring 96 Upper crosshead 100 Punch plate 102 Punch shank 104 Support hole 106 Key hole 110 Annular groove 112 Support pin 114 Ball plunger 118 Punch 120 Stripper sleeve 134 End cam 136 Plate cam

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B30B 13/00 B21D 43/05 B30B 15/32

Claims (6)

(57) [Claims] An upper die and a lower die for processing a material, wherein the lower die is arranged on a plurality of dies arranged along a moving direction of the material and on an upper surface of each of the dies. A plurality of through holes provided in the transfer plate, and a knockout member provided in a processing hole provided in each of the dies so as to be vertically movable at a predetermined timing synchronized with the rotation of the crankshaft, The upper die is moved up and down by the crankshaft and positioned at an upper position corresponding to each of the processing holes, and the transfer plate is synchronized between the processing position and the pre-process position with the rotation of the crankshaft. When the transfer plate is positioned at the processing position and the pre-process position, each of the through holes is configured to correspond to the corresponding one of the dies. After being positioned coaxially with the hole and the transfer plate being positioned in the pre-process position, each of the knockout members is raised so that each of its upper surfaces is substantially identical to the upper surface of each of the dies. Transfer press positioned on a surface and then moving the transfer plate to the processing position, whereby each of the materials located on the upper surface of each of the knockout members is transferred to the processing position. . 2. A moving body is connected to the crankshaft so as to move up and down. A punch plate is attached to a position below the moving body, and the punch plate supports each of the upper dies. Support holes are formed, and at positions where the support holes are formed, two parallel tangential directions extending from one side of the punch plate toward the other side of the punch plate. Key holes are respectively formed, and each of the key holes is
Each of the support holes is formed so as to extend by cutting out a part of the inner peripheral surface thereof. Each of the upper dies has a support portion formed at an upper end thereof so as to fit into the support hole. An annular groove is formed on the outer peripheral surface of the key hole, and in a state where each of the support portions is fitted into each of the corresponding support holes, a part of each of the annular grooves becomes a part of each of the key holes. Each of the upper dies is detachably attached to the punch plate by the support pin being inserted into each of the key holes and the insertion position being held by the holding means so as to be able to be pulled out. The transfer press according to claim 1, wherein 3. An upper crosshead means is connected to the crankshaft so as to move up and down, and a punch plate is attached to a position below the upper crosshead means. A support hole for supporting the punch shank included in each of the is formed,
At each of the formation positions of the support holes, two parallel key holes are formed, which are tangential to each of the support holes and extend from one side of the punch plate toward the other side. Each of the key holes is formed to extend by notching a part of the inner peripheral surface of each of the support holes, and a support portion that can fit into the support hole is provided at an upper end of each of the punch shanks. An annular groove is formed on an outer peripheral surface of each of the support portions, and a portion of each of the annular grooves is formed when the support portion of each of the punch shanks is fitted in the support hole. Are positioned so as to constitute a part of each of the key holes, the support pins are inserted into each of the key holes, and the insertion position is held by the holding means so as to be able to be pulled out. That it is detachably attached to the punch plate Transfer press according to claim 1, symptoms. 4. The holding means has a screw hole formed in the punch plate such that one end is opened on one surface of the punch plate and the other end is opened on each of the key holes. A ball plunger engaged with each of the support pins, and an annular groove formed at a predetermined position on each of the support pins. When each of the support pins is inserted into each of the key holes, the support The transfer press according to claim 2 or 3, wherein the ball plunger is configured to engage with the annular groove of each of the pins. 5. Each of the dies is supported by projecting from the upper surface of the die holder by fitting a part of the dies into an annular support recess formed in the upper surface of the die holder. An annular groove is formed on the outer peripheral surface, and each of the annular grooves is positioned at a position protruding from the upper surface of the die holder. On the upper surface of the die holder, a plurality of support keys are provided. The two ends of each of the support keys are arranged in parallel so as to extend in the tangential direction so as to be able to be inserted and removed with respect to each of the support keys, and the die holder is provided through key guides arranged orthogonal to each of the support keys. 2. The transfer press according to claim 1, wherein said transfer press is detachably fixed to said upper surface. 6. Each of the through holes of the transfer plate is constituted by a transfer ring detachably mounted in a mounting hole formed in the transfer plate, and a lower end of each of the punch shanks is provided with a punch. Is provided integrally with or separately from the punch shank, and at least a part of each of the punch shank includes:
A stripper sleeve is movably fitted in a predetermined range in the axial direction, and a lower end portion of the stripper sleeve is fitted to an outer peripheral portion of the punch, and by a biasing means provided on the upper crosshead, The punch shank, the punch, the stripper sleeve,
An outer periphery of the transfer ring, at least a portion of each of the knockout members and each of the dies,
4. The transfer press according to claim 3, wherein the outer peripheral portion and the inner peripheral portion are formed in a substantially circular shape.