JP2552291Y2 - Material supply equipment for machine tools - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material supply device for a machine tool such as a forming machine, and more particularly to a material supply device for intermittently supplying a long material such as a strip or a wire by a predetermined length.

[0002]

2. Description of the Related Art For example, in a forming machine,
A material supply device for intermittently supplying a long material, and various forming mechanisms for forming the fed material into a predetermined shape, and the like are provided. In addition to the drive at the timing, the cycle from the start of the supply of the material by the material supply device to the end of the predetermined forming operation by the forming mechanism is repeated as one cycle.

In this case, the forming operation by the above-described forming mechanism is performed between the end of the supply operation of the material by the material supply device and the start of the supply operation of the next material. In the material supply device of the above, the forming operation must be performed within a period of about one half of one cycle.

[0004] Therefore, in the case where complicated forming is required, it may be difficult to execute all necessary forming operations within the above-mentioned period. In order to solve this problem, for example, the time required for performing complex molding is secured by increasing the period of one cycle, that is, the time from the start of material supply to the end of all predetermined molding operations. However, there is a problem that the time required for material supply becomes longer than necessary, the efficiency is reduced, and the cost is increased.

[0005] Therefore, in the forming machine as described above, the material supply time is shortened without increasing the period of one cycle, and a sufficiently long molding time is ensured. It was desired to be able to be easily formed.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed to meet the above-mentioned demand, and is an apparatus capable of quickly and reliably performing a material supply operation in a machine tool such as a forming machine as described above. The purpose is to provide.

[0007]

In order to achieve the above object, a material supply apparatus according to the present invention has the following configuration. That is, in a reciprocating material supply device that intermittently supplies a long material, a reciprocating carrier that intermittently supplies the material by a predetermined length while sandwiching the material, and a screw shaft that reciprocates the carrier, A female screw member screwed to the screw shaft and rotatably provided on the carrier so as to be freely movable with the carrier, and a motor for independently rotating the screw shaft and the female screw member in the same direction, The carrier is reciprocated at a speed difference between the two motors.

[0008]

As described above, the screw shaft for reciprocating the carrier, and the female screw member screwed to the screw shaft and provided on the carrier so as to be freely rotatable and movable integrally with the carrier,
Each carrier is independently rotated in the same direction by a motor, and the carrier is reciprocated at a speed difference between the two motors. Therefore, the material supply operation in a machine tool such as a forming machine is performed independently and efficiently from the machining operation. It is possible to make it.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described with reference to an example in which the present invention is applied to a material supply device of a forming machine. FIG. 1 is a front view of a main part of a forming machine provided with a material supply device according to the present invention, FIG. 2 is an enlarged front view of a part of the material supply device, and FIG. 3 is an enlarged sectional view taken along line AA in FIG. .

In FIG. 1, reference numeral 1 denotes a forming machine body, a material supply device 2 for supplying a material W such as a metal strip or a wire to a front surface of a surface plate 1a, and a press mechanism for punching the material W into a predetermined shape. A plurality of forming mechanisms 4 for forming the material 3 and the material W into a predetermined shape are arranged. The above-described press mechanism 3 is arranged as necessary. For example, when processing a wire, the press mechanism 3 may be omitted and a cutter or the like may be mounted. The type and number of the forming mechanism 4 are appropriately selected according to the type of the processing material and the content of the forming process, and are radially provided at predetermined positions around the cored bar 5 as shown in the figure.

A main gear 6 for driving the above-described mechanisms 3 and 4 is built in the machine body 1.
It is rotationally driven at a predetermined peripheral speed by a motor or the like omitted in the figure. With the rotation of the main gear 6, the mechanisms 3 and 4 are operated at a predetermined timing via a driven gear (not shown) meshing with the main gear 6.

The material supply device 2 includes a reciprocating carrier 7 for intermittently supplying a long material W intermittently by a predetermined length, and the carrier 7 is movable along a guide member 8. In addition, the carrier 7 is provided with a holder 9 for holding the material W between the carrier 7 and the holder 9 so as to be swingable about a shaft 10.
The material W is sandwiched between the holder 9 and the side surface of the carrier. Reference numeral 11 denotes a spring that constantly biases the holder 9 in a direction away from the carrier 7, 12 denotes a pressing member that presses the holder 9 against the carrier 7 against the spring 11, and the pressing member 12 is a cam 13. It is configured to move parallel to the holder 9 at a predetermined timing.

In the figure, reference numeral 14 denotes a clamp mechanism for holding the supplied material W, and a fixing receiving member 15 provided on the upper surface of the machine body.
And the rod 16 that moves forward and backward toward the material W. Reference numeral 17 denotes a return spring of the rod 16, and reference numeral 18 denotes a rotating disk for driving the rod, which is configured to advance and retreat the rod 16 via a swing arm 19 by a cam 18a provided on a peripheral surface of the disk 18. is there.

The reciprocating carrier 7 reciprocates between a screw shaft 21 and a female screw member 22 screwed thereto. The screw shaft 21 is inserted through a through hole 7a formed in the carrier 7. The female screw member 22 is disposed in parallel with the guide member 8 so as to be freely rotatable in the through hole 7 a via a bearing 23 and movably held integrally with the carrier 7 in the axial direction of the screw shaft 21. I have.

The screw shaft 21 and the female screw member 22 use a ball screw in this embodiment, and are formed on the outer peripheral surface of the screw shaft 21 and the inner peripheral surface of the female screw member 22 as shown in FIG. A ball 24 for lubrication is filled between the spiral grooves 21a, 22a having a semicircular cross section, and a passage 22b for circulating the ball 24 is provided in the female screw member 22. In FIG. 1, reference numeral 25 denotes a motor for driving a female screw member mounted on the side surface of the carrier 7. In this embodiment, a servomotor is used, and the female screw member 22 is rotationally driven in a predetermined direction via gears 26 and 27. Configuration. 28
Is a bearing provided in the carrier through hole 7a on the side opposite to the female screw member 22, and 29 is a female screw member. In this embodiment, a ball screw having substantially the same configuration as the female screw member 22 is used.

The screw shaft 21 is rotatably supported by a bearing member 30, and a screw shaft driving motor 31 for rotating the screw shaft 21 is used as shown in FIG.
Is attached via a support member 32 to the inner surface of the surface plate 1a. In this embodiment, a servo motor is also used as the screw shaft driving motor 31, and the screw shaft 21 is rotated at a predetermined speed in a fixed direction via gears 33 and 34 and bevel gears 35 and 36. .

In the above configuration, the screw shaft 21 and the female screw member 22 are rotated in the same direction by the motors 31 and 25, respectively, and one of the rotation speeds is made faster or slower than the other. ,
The carrier 7 is moved forward and backward along the guide member 8. For example, the screw shaft 21 is always rotated at a predetermined speed in the direction of arrow a in FIG. 2, and the female screw member 22 is faster in the same direction as the screw shaft 21. When rotated, the carrier 7 can be advanced leftward in FIG. 2, and when rotated slower than the screw shaft 21, the carrier 7 can be retracted rightward in FIG. When the female screw member 22 is rotated at the same speed in the same direction as the screw shaft 21, the carrier 7 can be stopped at that position.

Therefore, the material supply operation can be performed, for example, in the following manner. That is, until the supply of the material W is started, the screw shaft 21 and the female screw member 22 are rotated at the same speed in the same direction, for example, the direction of the arrow a in FIG. To stop. When the material W is supplied, the pressing member 12 is pressed against the holder 9 by the cam 13 to hold the material W sent between the holder 9 and the carrier 7 via the guide roller 37 or the like. By rotating the female screw member 22 faster than the screw shaft 21 in the same direction as described above, the carrier 7 is advanced leftward in FIG.

When the female screw member 22 is returned to the same rotation speed as the screw shaft 21 when the material W has been supplied for a predetermined length, the movement of the carrier 7 to the left is stopped and the material supply operation is completed. . In this state, the clamp mechanism 14 is operated to advance the reciprocating rod 16, and when the material W is sandwiched between the rod 16 and the fixed receiving member 15, a punching process is performed by the press mechanism 3. It is guided to the forming mechanism 4 without being separated, and is formed into a predetermined shape.

On the other hand, when the pressing member 12 is retracted from the holder 9 when the material W is fixed by the clamp mechanism 14 as described above, the holder 9 is
The fixed state of the material W is released by rotating in a direction away from the material W. In this state, when the female screw member 22 is rotated at a lower speed than the screw shaft 21 in the same direction as described above, the carrier 7 retreats rightward in FIG. 2 and returns to the original supply operation start position. When the rotation speed is returned to the same as that of the screw shaft 21, the carrier 7 can be stopped at that position.

The above-described material supply operation is performed by the motors 25 and 31.
The rotation speed, the driving time, and the like are set in advance, and the driving is performed in accordance with the rotation speed and the driving time.
Further, by appropriately changing the rotation speed of the female screw member 22 with respect to the screw shaft 21, the material supply speed can be appropriately adjusted.
Can be set arbitrarily independently of the processing operation by.
Further, the screw shaft 21 and the female screw member 22 are rotated in the same direction, and the reciprocating carrier 7 for supplying the material is moved forward and backward by a difference in rotation speed between the two, so that the operation is smooth, quick and reliable. A material supply operation can be performed.

In the above embodiment, the rotation speed of the screw shaft 21 is kept constant and the rotation speed of the female screw member 22 is changed. However, the rotation speed of the female screw member 22 is kept constant, and the rotation speed of the screw shaft 21 is kept constant. The rotation speed may be changed. In the illustrated example, only one of the female screw members 22 and 29 is rotationally driven by the motor 25, but both may be rotationally driven by the motor. Alternatively, when one of the female screw members 22 and 29 is driven by a motor as in the embodiment, the side that is not rotationally driven by the motor is free to rotate in the circumferential direction with respect to the screw shaft 21 instead of using the female screw member. Alternatively, a bearing member slidable in the axial direction may be used.

In this embodiment, the pressing member 12 and the clamp mechanism 14 are moved forward and backward by cams 13 and 18a, respectively, and the cams 13 and 18a are driven by the main gear 6 at a predetermined timing. However, each of the cams 13 and 18a may be driven by, for example, the screw shaft driving motor 31, or a dedicated motor for driving each of the cams 13 and 18a may be separately provided. Alternatively, the pressing member 12 and the clamp mechanism 14 can be driven by an electromagnetic plunger or the like without using a motor or a cam as described above.

[0024]

As described above, according to the present invention, in a reciprocating material supply device for intermittently supplying a long material W, the material W is intermittently supplied by a predetermined length while being sandwiched. A reciprocating carrier 7, a screw shaft 21 for reciprocating the carrier 7, and a female screw member 22 screwed to the screw shaft 21 and provided on the carrier 7 so as to be freely rotatable and movable integrally with the carrier 7. A motor 25 for independently rotating the screw shaft 21 and the female screw member 22 in the same direction;
Since the carrier 7 is reciprocated at a speed difference between the two motors 25 and 31, the material supply operation can be performed smoothly and quickly, and various types of processing in a machine tool such as a forming machine can be performed. The material supply operation can be executed independently without affecting the operation. In addition, there is an effect that it can be easily incorporated into various existing machine tools.

[Brief description of the drawings]

FIG. 1 is a front view of a forming machine including a material supply device according to the present invention.

FIG. 2 is a partially enlarged cross-sectional view.

FIG. 3 is an enlarged sectional view taken along line AA in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine main body 2 Material supply device 3 Press mechanism 4 Molding mechanism 7 Carrier 9 Holder 21 Screw shaft 22 Female screw member 25 Female screw member drive motor 31 Screw shaft drive motor W Material

Claims (2)

(57) [Scope of request for utility model registration] 1. A reciprocating material supply device for intermittently supplying a long material, a reciprocating carrier for intermittently supplying the material by a predetermined length while holding the material, and a screw for reciprocating the carrier. A motor having a shaft and a female screw member screwed to the screw shaft and rotatably provided on the carrier so as to be freely rotatable and movable integrally with the carrier, and independently rotating the screw shaft and the female screw member in the same direction. Wherein the carrier is reciprocated at a speed difference between the two motors. 2. The material supply device for a machine tool according to claim 1, wherein a ball screw is used for the screw shaft and the female screw member.