JPH10314871A - Feed bar driving device of transfer press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To speedily drive a feed bar and to provide a feed bar driving device of small number of parts. SOLUTION: A feed bar driving device of a transfer press is provided with a feed carrier 13 connected with a feed bar 11 so as to be freely movable up and down and in the right and left direction and to be restricted from the forth and back movement, and a feed unit 16 to move the feed carrier 13 forth and back. The feed unit 16 is composed of a feeding linear motor 71 whose fixing part 72 is attached to a press frame 15 and whose moving part 73 is attached to the feed carrier 13 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feed bar drive device of a transfer press used for, for example, sheet metal working.

[0002]

2. Description of the Related Art In a conventional apparatus of this kind, a feed bar is connected to a feed bar so that the feed bar can move freely in the vertical and horizontal directions, but the movement in the front and rear direction is restricted. A feed unit that moves back and forth.The feed unit includes a rotary motor and a transmission mechanism that converts the rotational motion of the output shaft of the motor into reciprocating linear motion and transmits the linear motion to the feed carrier. Machine, rack and pinion, etc.
There are known components composed of zero or more parts.

[0003]

In the above-mentioned conventional apparatus, there is always play in the connection between the parts constituting the transmission mechanism, and the play generates vibration, thereby increasing the operation speed of the feed bar. Had limitations.

In addition, since the number of parts is large, the number of parts processing / assembly time is increased, and maintenance is troublesome.

An object of the present invention is to solve the above problems,
An object of the present invention is to provide a transfer press feed bar driving device that enables high-speed operation of a feed bar and requires a small number of parts.

[0006]

A feed bar driving device for a transfer press according to the present invention has a structure in which the feed bar is free to move vertically and horizontally but is restrained from moving forward and backward. In a transfer bar feeder for a transfer press, the feed bar drive includes a feed carrier and a feed unit for moving the feed carrier back and forth, wherein the feed unit has a fixed part mounted on the press frame and a moving part mounted on the feed carrier. It is characterized by being constituted by a motor.

In the feed bar drive device of the transfer press according to the present invention, the feed unit is constituted by a feed linear motor having a fixed portion mounted on the press frame and a moving portion mounted on the feed carrier. The feed operation is performed by the motor. Since the linear motor has no rotating parts and a small number of parts, high-speed operation of the feed bar is possible.

Further, the feed bar driving device has a lift carrier connected so that the feed bar can freely move in the front-rear direction but restrains the vertical movement thereof. There is a clamp carrier connected so that the movement is free, but the movement in the left-right direction is restricted, and a clamp unit for moving the clamp carrier right and left, and the clamp unit moves the fixed part to the apparatus frame. When the parts are constituted by linear motors for clamping attached to the respective clamp carriers, the feed bar can be clamped by the linear motor in addition to the feed operation.

In addition, the feed bar driving device is further provided with a lift unit for moving the lift carrier up and down. The lift unit has a fixed part mounted on the clamp carrier and a moving part mounted on the lift carrier. When constituted by a motor, the feed bar can be lifted by a linear motor in addition to the feed operation and the clamping operation.

In addition, in order to cause the feed bar to perform a clamping operation in addition to the feeding operation, the feed bar driving device allows the feed bar to move freely in the front-rear direction, but restricts the movement in the vertical direction. And a clamp carrier that is connected to the clamp carrier so that the left and right movement of the clamp carrier is free, but the vertical movement is restricted, and a clamp unit that moves the clamp carrier left and right. May be provided, and the clamp unit may be constituted by a linear motor for clamping in which a fixed portion is attached to the lift carrier and a moving portion is attached to the clamp carrier.

Further, in order to cause the feed bar to perform a lift operation in addition to the feed operation and the clamp operation,
The drive device may include a lift unit that moves the lift carrier up and down, and the lift unit may be configured by a lift linear motor having a fixed portion attached to the device frame and a moving portion attached to the lift carrier.

If the fixed portion is made of an armature, the moving portion is made of a magnetic field, and the length of the moving portion is smaller than the length of the fixed portion, the total space length required for the operation of the linear motor is reduced. This is advantageous because the minimum is required.

When a linear motor is installed in a press, the housing is often mounted in a cantilevered state on a press frame with the linear motor housed in a box-shaped housing. In such a case, if the length of the linear motor is long, the possibility of a vibration problem increases.

Further, when the armature is set to the movable side, it is necessary to move the power supply cable connected to the armature as a flexible one. During the high-speed reversal operation, a malfunction which may be caused by the vibration of the power supply cable is required. However, if the armature is fixed, there is no need to worry.

It is preferable that the fixed portion is constituted by a plurality of divided pieces connected in a straight line.

If the fixed part, that is, the armature is divided and manufactured at a certain length, a large number of small parts will be manufactured. Therefore, since the mass production effect is obtained, the cost is reduced and the quality is improved. Further, the total length of the armature can be freely set by increasing or decreasing the number of divided pieces. Furthermore, if a failure occurs in a certain divided piece,
It is possible to replace only the divided piece having the defect.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

In the following description, front and rear refer to the right side of FIG. 1 as the front and the opposite side to the rear with reference to FIG.
The left and right are defined as left and right when viewed from behind.

The transfer press is provided with a pair of left and right feed bars 11 extending in the front-rear direction, and below the feed bars 11 near both front and rear ends thereof.
A pair of left and right front and rear clamp / lift units 12 for moving left and right and up and down respectively, and both feed bars 11 are free to move up and down and left and right, but are restricted from moving back and forth. And a pair of left and right feed carriers 13
A pair of left and right L-shaped connecting members 14 respectively connecting the rear end of the feed carrier 13 and the feed carrier 13, and a left and right pair of right and left mounted on a press body (not shown) projecting rearward and suspending the feed carrier 13 to be able to move back and forth It includes a pair of brackets 15 and a pair of left and right feed units 16 for moving the feed carrier 13 back and forth.

The left and right feed bars 11, the clamp / lift unit 12, the feed carrier 13, the connecting member 14, the bracket 15, and the feed unit 16 are the same.

A front and rear horizontal feed guide rail 21 extending in the front-rear direction is provided at a place where the clamp / lift unit is provided on the lower surface of the feed bar 11. On the rear end face of the feed bar 11, a lift guide member 22 with a vertical guide groove is provided.

The clamp / lift unit 12 has a box-shaped casing 32 having a slit 31 extending in the left-right direction on the top wall.
And an operating rod 33 that is passed through the slit 31 and protrudes upward. A drive mechanism (not shown) is housed in the casing 32. The driving mechanism is a well-known one driven by a rotary motor. The actuation rod 33 is moved left and right and up and down by the drive mechanism. Feed guide rail at the end of the operating rod 33
Feed guide member with vertical guide groove fitted to 21
34 are installed. The horizontal movement and the vertical movement of the operating rod 33 cause the feed bar 11 to perform a clamping operation and a lifting operation.

A motor mounting ridge 41 is provided at the center of the upper surface of the feed carrier 13 in the left-right direction, and a pair of motor-groove guide members 42 with guide grooves extending parallel to each other in the front-rear direction are provided on both sides thereof. . On the lower surface of the feed carrier 13, a pair of front and rear clamp guide rails 43 extending in the left-right direction in parallel with each other are provided.

On the rear surface of the connecting member 14, a lift guide member is provided.
A lift guide rail 51 fitted into 22 is provided. On the upper surface of the connecting member 14, a clamp guide rail 43
A clamp guide member 52 with a guide groove into which the groove is fitted is provided.

On the lower surface of the bracket 15, there are provided motor housing recesses 61, both ends of which are extended in the front-rear direction, into which the ridges 41 for mounting the motor are fitted at intervals in the left-right direction.
A pair of left and right motor guide rails 62 fitted into the motor guide member 42 is provided at the opening edge.

The feed unit 16 is constituted by a synchronous linear motor 71 for feed. Linear motor
71 has a pair of coil plates 72 as fixed parts and a pair of magnet plates 73 as moving parts. Double coil plate
Reference numeral 72 is vertically fixed to the opposite side surface of the motor housing recess 61. The two magnet plates 73 are vertically fixed to the opposite side surface of the motor mounting ridge 41.

When a current is applied to the coil plate 72 so as to generate a moving magnetic field, the magnet plate 73 moves by receiving a force attracted and repelled by the current. The feed carrier 13 is moved together with the magnet plate 73, so that the feed bar 11 performs a feed operation. During the feed operation,
The clamp operation of the feed bar 11 by the clamp / lift unit 12 is performed by the clamp guide member 43 and the clamp guide rail 52, and the lift operation is performed by the lift guide member.
22 and lift guide rail 51 cancel each. The linear motor 71 is replaced with a synchronous motor,
An induction type may be used.

Next, modified examples of other various usage examples of the linear motor will be described. In the following description, FIGS.
The same reference numerals are given to the portions corresponding to the portions indicated by, and the description thereof is omitted.

FIG. 5 shows a feed operation of the feed bar 11,
The figure shows that all of the clamping operation and the lifting operation are performed by a linear motor.

A mechanism for causing the feed bar 11 to perform a feed operation is constituted by a feed carrier 13, connecting members 14, 15 brackets 15, and a feed unit 16, similarly to the mechanism shown in FIGS. Feed unit 16
Consists of a linear motor 71. However, here, only one coil plate 72 and one magnet plate 73 of the linear motor 71 are shown for simplification.

On the lower surface of the feed bar 11, a feed guide rail 111 is provided. Feed guide rail
A feed guide member 113 provided on a lift carrier 112 is fitted on the 111. Lift carrier 11
2 is connected to the clamp carrier 1 via the lift unit 114.
15 are concatenated. The lift unit 114 includes a lift linear motor 116. The lift linear motor 116 includes a magnet plate 117 fixed to the lift carrier 112 and a coil plate 118 fixed to the clamp carrier 115. Clamp carrier
115 is the press body 121 via the clamp unit 119
It is connected to. The clamp unit 119 includes a clamp linear motor 122. Linear motor for clamping
Reference numeral 122 denotes a magnet plate 123 fixed to the clamp carrier 115 and a coil plate 124 fixed to the press body 121.

The feed operation of the feed bar 11 is performed by the feed unit 16, the lift operation is performed by the lift unit 114, and the clamp operation is performed by the clamp unit 119.

FIG. 6 shows a case where all of the feed operation, the clamp operation and the lift operation of the feed bar 11 are performed by a linear motor, as in FIG. 5, but the arrangement of the lift carrier and the clamp carrier is different. The opposite is true.

On the lower surface of the feed bar 11, a feed guide rail 131 is provided. Feed guide rail
A feed guide member 133 provided on a clamp carrier 132 is fitted to 131. A lift carrier 135 is connected to the clamp carrier 132 via a clamp unit 134. The clamp unit 134 is
It is constituted by a linear motor 136 for clamping.
The linear motor 136 for clamping is
And a coil plate 138 fixed to the lift carrier 135. The lift carrier 135 is connected to a press body 141 via a lift unit 139. The clamp unit 139 includes a linear motor 142 for clamping. The lift linear motor 142 includes a magnet plate 143 fixed to the lift carrier 135 and a coil plate 144 fixed to the press body 141.

The feed operation of the feed bar 11 is performed by the feed unit 16 and the clamp unit 134 is operated.
Lift operation is performed, and the lift unit 139 performs a clamp operation.

FIG. 7 shows the lift unit 114 shown in FIG.
, A different lift unit is employed.

The lift unit 151 includes a clamp carrier.
It has an operating rod 152 which is raised and lowered by a drive mechanism (not shown) built in 115 and connected to the lift carrier 112. The drive mechanism is a well-known drive mechanism driven by a rotary motor, similarly to the clamp / lift unit shown in FIGS.

FIG. 8 shows the lift unit 139 shown in FIG.
, A different lift unit is employed.

The lift unit 151 is moved up and down by a drive mechanism (not shown) built in the press body 141 and connected to a lift carrier 132 by an operating rod 15.
Has 2 The drive mechanism is a well-known drive mechanism driven by a rotary motor, as described above.

Further, a preferred specific example of the linear motor in the cases shown in FIGS. 1 to 4 will be described with reference to FIG.

The coil plate 72 is made of an armature of a linear motor, and connects two identical coil plates 72a and 72b in series.
This is the fixed side. 72 of coil plates to connect
The number of a and 72b may be three or more. Magnet plate 73
Is composed of the field of a linear motor, which is made movable. Assuming that the stroke of the feed bar is L and the length of the magnet plate 73 is L ′, the length of the coil plate 72 is L + L ′.

In the above description, the lengths of the coil plates 72a and 72b and the magnet plate 73 indicate the minimum substantially effective length that can function as a linear motor. Coil plate 72a,
72b is a coil wound around iron core teeth,
No extra teeth or slots shall be present at the end of the iron core. The magnet plate 73 has magnets attached to the base plate at a predetermined pitch, but the base plate does not protrude from the magnets at both ends.

When a linear motor having such a configuration is employed, the length of the linear motor can be reduced. Also, there is no need to move the power supply cable connected to the armature.

Assuming that the armature 201 is fixed and the field 202 is movable as shown in FIG.
Is L ′, the length of the field 202 is L + L ′, and the length of the field 202 determined by the motor is 2L + L ′.

FIG. 15B shows a case where the armature 203 is on the movable side and the field 204 is on the fixed side. In this case, the length of the motor of the armature 203 can be L + L '. However, when the armature 203 is set to the movable side, the possibility of occurrence of a vibration problem increases. Further, in this case, it is necessary to move the power supply cable as a flexible one, and a malfunction may occur due to the vibration of the power supply cable during the high-speed reversal operation.

In the above description, an example of using a linear motor has been described. In addition, any one or two of the feed operation, the clamp operation and the lift operation of the feed bar are driven by the linear motor. ,
It may be driven by a known rotary motor.

In the above, the feed operation, the clamp operation and the lift operation of the left and right feed bars are driven by separate linear motors. Therefore, the timing,
The feed operation, the clamp operation, and the lift operation can be performed by changing the stroke or the like.

[0048]

According to the present invention, there is provided a feed bar driving device for a transfer press which enables high-speed operation of the feed bar and requires a small number of parts.

[Brief description of the drawings]

FIG. 1 is a plan view of a driving device according to the present invention.

FIG. 2 is a side view of the device.

FIG. 3 is a vertical sectional view taken along a line III-III in FIG. 2;

FIG. 4 is a perspective view of a main part of the device.

FIG. 5 is a perspective view showing a modification of the apparatus.

FIG. 6 is a perspective view showing another modified example of the device.

FIG. 7 is a perspective view showing still another modified example of the device.

FIG. 8 is a perspective view showing still another modified example of the device.

FIG. 9 is an explanatory diagram showing a specific configuration example of a linear motor.

FIG. 10 is an explanatory diagram showing another specific configuration example of the linear motor.

[Explanation of symbols]

 11 Feed bar 13 Feed carrier 15 Bracket 16 Feed unit 71 Linear motor 72 Coil plate 73 Magnet plate

Continuing from the front page (72) Inventor Mitsumune Araki 1-28-28 Jiyugaoka, Kanazu-cho, Sakai-gun, Fukui Prefecture Inside Fukui Machinery Co., Ltd. (72) Hiroyuki Makino 1-28-28 Jiyugaoka, Kanazu-cho, Sakai-gun, Fukui Fukui Inside Machinery Co., Ltd. (72) Inventor Kenji Nishida 1-28-28 Jiyugaoka, Kanazu-cho, Sakai-gun, Fukui Prefecture Inside (72) Inventor Masatada Tanaka 1-28-28, Jiyugaoka, Kanazu-cho, Sakai-gun, Fukui Prefecture Fukui Machinery Co., Ltd.

Claims (7)

[Claims] The feed bar is connected to the feed bar so that it can move freely in the vertical and horizontal directions, but the movement in the front and rear direction is restricted, and a feed unit that moves the feed carrier back and forth. The feed unit 16 of the transfer press, comprising: a feed unit 16;
A feed bar driving device for a transfer press, comprising a feed linear motor 71 in which a moving portion 73 is attached to the feed carrier 13. 2. A lift carrier 112 which is connected so that the feed bar 11 is free to move in the front-rear direction, but is restrained from moving in the vertical direction.
The clamp carrier 11 is connected so that its vertical movement is free, but its horizontal movement is restricted.
5 and a clamp unit 119 for moving the clamp carrier 115 right and left.
2. A feed bar driving device for a transfer press according to claim 1, wherein the fixed portion is constituted by a clamping linear motor in which the fixed portion is attached to the device frame and the moving portion is attached to the clamp carrier. 3. A lift unit 114 for moving the lift carrier 112 up and down is provided.
Fixing part 118 to clamp carrier 115, moving part 117
3. A feed bar driving device for a transfer press according to claim 2, wherein the feed bar driving device comprises a lift linear motor mounted on each of the lift carriers. 4. The clamp bar 132 is connected to the feed bar 11 such that the feed bar 11 is free to move in the front-rear direction, but is restrained from moving in the vertical direction.
132 is free to move in the horizontal direction, but is restricted in vertical movement.
135 and a clamp unit 134 for moving the clamp carrier 132 right and left.
Move the fixed part 138 to the lift carrier 138 and the moving part 13
2. A feed bar driving device for a transfer press according to claim 1, wherein said feed bar driving device comprises a linear motor for clamping 136 mounted on each of said clamp carriers 132. 5. A lift unit 139 for vertically moving a lift carrier 135, wherein the lift unit 139 is
5. The feed bar driving device for a transfer press according to claim 4, wherein the fixed portion 144 is constituted by an apparatus frame 141 and the moving portion 143 is constituted by a lift linear motor 142 attached to a lift carrier 135, respectively. 6. The fixed part 72 is made of an armature, the moving part 73 is made of a magnetic field, and the length of the moving part 73 is smaller than the length of the fixed part 72. A feed bar driving device for a transfer press according to one of the preceding claims. 7. The feed bar driving device for a transfer press according to claim 6, wherein the fixed portion 72 is constituted by a plurality of divided pieces 72a, 72b connected in a straight line.