JPS6020107B2 - High-speed headless thread rolling equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rolling device for unreliable screws, more specifically,
The present invention relates to a high-speed screw rolling device that uses a flat die to manufacture a screw that is different from a screw having a head such as a bolt screw.

[Prior art] In a thread rolling device using a secondary flat die, one of the two flat dies is engraved with the shape of the thread to be used to roll a thread groove into the material. The other die reciprocates at regular intervals, and while the reciprocating die passes the fixed die, the material is transferred between the two flat dies. is pressed to form a thread register in the material, that is, to roll the thread.

In this type of conventional thread rolling device using a flat die, one of the flat dies is fixed, so if the stroke of the reciprocating die is lengthened, the overall length of the device becomes unduly long.

Therefore, when rolling a thread into a material, it is necessary to apply considerable pressure to the material fed between the fixed die and the reciprocating die.

Therefore, when rolling small screws with a diameter of 3 mm or less, especially those with a hexagonal hole in the head, or set screws with slots, the double flat die should be used. There is a small risk that the hexagonal hole or slot may become deformed and crushed due to the pressing force during the manufacturing process. The high-speed thread rolling device according to the present invention is a novel high-speed unreliable thread rolling device in which two flat dies each having a thread shape are reciprocated in opposite directions. This is what we provide.

Note that Japanese Patent Publication No. 47-37345 discloses a method for reciprocating two flat dies in opposite directions.
It is disclosed that each of the flat dies is moved about a feeding table and a fixed table. However, the invention described in this publication does not move both dies to roll a thread, but manually rotates the material to be made into a thread, and then restores the flat die after rolling. This disclosure discloses a means for rolling screws at high speed, but does not disclose means for rolling screws at high speed. According to this invention, the length of the flat dies is made longer than that of the conventional one, and by rolling threads in the material between the flat dies, the pressure applied to the material can be reduced.

Furthermore, it is possible to roll threads at a higher speed than with conventional flat die thread rolling devices.

That is, for example, in the conventional flat die type screw rotating device, to manufacture a small screw with a diameter of about 3 sides, the speed is about 10 to 2 solids per minute, but according to the device of the present invention, , it is possible to roll at least twice as many screws per minute, for example about 50 to 150 screws per minute.
Therefore, an object of the present invention is to provide a high-speed unreliable thread rolling device suitable for mass production.

Another object of the present invention is to provide a high-speed unreliable screw rolling device that is particularly suitable for rolling setscrews with relatively small stems that have slots or hexagonal holes on the top plane of the screw. be. The above-mentioned objects and other objects, advantages and features of the invention will be made clearer by the description of the embodiments of the high-speed unreliable thread rolling machine of the invention, which are set forth in detail with reference to the accompanying drawings.

As shown in FIG. 1, a high-speed unreliable screw rolling device 10 of the present invention includes a machine stand 11 and a material supply device 12 for rolling unreliable screws (hereinafter simply referred to as "screws"). ing.

The material supply device 12 can be a well-known commercially available electromagnetic feeder capable of containing a large number of materials and feeding the materials by vibration of the device 12. As shown in FIG. 2, a pair of guides 14 and 15 are fixed at an interval along the longitudinal direction of the machine base 11 on the upper part of the machine base 11 of the high-speed unreliable screw shifting device 10. .

Each of these guides 14 and 15 is provided with flat dies 17 and 18 on one side, that is, on the opposite side, with a groove for rolling a thread in the material.
The mounting surfaces 19 are arranged to face each other and to be able to reciprocate in opposite directions, that is, in the direction of arrow A or arrow B, during operation. In order to do the above, a slider 20 is provided to support one of the flat dies 17 and to reciprocate along the guide 14.

One longitudinal end of the slider 20, the end on the arrow A side, is formed with a U-shaped notch 21, which is pivotally connected to one end of a connecting rod 23 by a pin member 22. The other end of the connecting rod 23 is pivotally connected to a portion of the rotating disk 25 near the outer circumferential edge of the rotating disk 25 at a pin portion 24 . The rotary disk 25 is mounted on the end of the main shaft 26 so as to rotate together with the main shaft 26, and the main shaft 26 is connected to a flywheel 27 which is rotated by a suitable transmission device such as a motor. As can be seen from the above configuration, one flat die 17 fixed to the slider 20' reciprocates in the direction of arrow A or B along the guide 14 in the longitudinal direction of the combination 11 by rotation of the main shaft 26.

Like the flat die 17, a slider 2 is provided to support the flat die 18 and reciprocate it along the guide 15.
8 is provided.

A pair of chain gears 30, 31 and chains 32, 33 are used to cause the slider 28 to reciprocate. That is, the chain gear 3 chain 32 attached to the machine base 11
are cooperating. One end of the chain 32 is connected to the end of the slider 20 on the arrow A side, and the other end of the chain 32 is connected to the end of the slider 28 on the arrow A side. Further, one end of the chain 33 that cooperates with the other chain gear 31 is connected to the end of the slider 20 on the arrow B side, and the other end of the chain 33 is connected to the slider 20.
8 on the arrow B side. With the above configuration, as the main shaft 26 rotates, one slider 20
moves along the guide 14 in the direction of arrow A, the other slider 28 moves in the direction of arrow B, and both sliders 20
and 28 can reciprocate in opposite directions. Next, a device for feeding the material M between the flat dies 17 and 18 of the high-speed cockscomb thread rolling device 10 of the present invention will be described in detail.

As shown in FIG. 3, this device first consists of a material supply head 3
5.

The material supply head 35 has a flat die 17 or 18 in the direction of arrow A.
It consists of a block section 37 that is cantilever-supported by a suitable beam member 36 (FIG. 2) on the machine base 11 so as to be located above the end in the direction of arrow A when the machine moves in the direction of. The block member 37 is provided vertically through it with a hole 38 for receiving the material M to be rolled, the upper end of the hole 38 being fitted with a suitable flexible conduit 39 for supplying the material M, which is known per se. It is connected to device 12. A large number of materials M accommodated in the material supply device 12 are
Sequentially and continuously, they are fed and aligned through the conduit 39 into the upright holes 38 of the block member 37 of the material supply head 35. As shown in FIG. 4, the hole 3 of the block member 37
Only the first piece M of the material M fed into hole 38
A relay plate member 40 and a material receiving plate 41 are provided to cooperate with the material supply head 35 as a device for taking out the material.

That is, in order to attach the relay plate member 40 to the machine stand 11 in close proximity to the lower surface of the block member 37 of the material supply head 35, the relay slope member 40 is cantilevered on a support device 42 attached to a part of the machine stand 11. I support it. Relay slope member 40
The free machine extends below the material supply head 35 and stores one material M, at a position aligned with the hole 38 of the flock member 37.
A sekiguchi 43 is provided to accept the . Relay slope member 40
Below the material M. is received in the opening □43. is supported on the top surface of the slider 28 to prevent it from falling,
A material receiving plate 41 reaching below the head 35 is fixed. It is desirable to adjust the level of the head 35 so that the distance between the lower surface of the head 35 and the upper surface of the receiving plate 41 almost matches the length of the material M to be rolled. As will be described later, if the closed opening 43 of the relay slope member 40 is empty without any material M, the first piece of material M from the hole 38 of the material supply head 35 will be transferred to the relay plate village 40. It falls into the opening 43 and is supported on the receiving plate 41.

As shown in FIG. 2, a material feeding device 45 is installed adjacent to the flat die 18 on the arrow A side of the slider 28.
The age is set so that it moves with 8. This material feeding device 45 supplies the material M from inside the Sekiguchi 43 of the relay Itabemura 40.
, and sends the fin to a position close to the end on the arrow B side of the flat die 17 in order to feed the fin between the flat dies 17 and 18. As shown in FIGS. 5 and 6, the material feed device 45 consists of a casing 46 which, at the end of the travel of the slattider 28 in the direction of the arrow A, corresponds to the position of the opening 43 in the relay plate member 40. An aligned material receiving portion 47 is provided at a portion adjacent to the flat die 18.

Below the material receiving part 47 is a flat die 17 containing a material M.
, 18 is provided with a bottom surface 48 to prevent the device from falling below the operating surface 0 of the device. As the slider 28 moves in the direction of arrow A with this bottom surface 48 as a base, the push plate 50 can be moved in a direction perpendicular to the longitudinal axis of the slider 28.
is provided on the casing 46 so as to be pressed in the opposite direction of the slider 20 by a coil spring 51. A pin 52 extending upward is attached to the upper part of the push plate 50, and the upper part of the pin 52 protrudes through a slot 53 provided on the upper surface of the casing 46, and is attached to the upper surface of the casing 46 with a pivot 54. It is in contact with the tip 56 of the attached lever 55.

A cam follower 57 is rotatably attached to the other end of the lever 55. This cam follower 57 is
It cooperates with a cam plate 58 fixed to the upper part of the cam plate 58. This cam plate 5
8 has a tapered end on the arrow B side as clearly shown in FIGS. 2 and 5. That is, slider 28
Before reaching the final position of movement in the direction of arrow B, the pin 52 is held by the tip 56 of the lever 55 so that the push plate 50 does not move due to the action of the spring 51; As the cam follower 57 approaches the final position of the movement, the cam follower 57 gradually moves along the tapered surface of the cam plate 58, and the lever 56 stops holding the pin 52, causing the push plate 50 to coil. Due to the action of the spring 51, the flat die 1
The material inserted in front of the push plate 50 of the material receiving part 47 is sent out to the side of the flat die 17. As can be understood from the above explanation, after the material M is received in the entrance 43 of the relay slope member 40, the slider 28 moves in the direction of arrow A, and the opening 43 of the relay slope member 40 allows the material to be fed into the opening 43 of the relay slope member 40. Upon reaching the position aligned with the material receiving part 47 of the device 45, the material M in the gate 43 falls into the material receiving part 47 of the material feeding device 45, and then is moved by the action of the cam plate 58 and the cam follower 57. The push plate 50 is pushed out toward the side surface of the flat die 17 by the action of the coil spring 51, and the material M in the receiving part 47,
is pressed against the side surface of the flat die 17 by the push plate 50, and the slider 28 is pressed in the direction of the arrow A of the slider 20.
As the material M moves in the direction of arrow B, the material M is inserted between both flat dies 17 and 18, and a thread is rolled on the periphery of the material by the flat dies 17 and 18.

The thus rolled material M. is the final position of the flat die 18 moved in the direction of arrow A, and escapes from the ends of the flat die 17 on the arrow A side and the flat die 18 on the arrow B side, and falls into the receiver 60 provided on the machine base 11. The thread is guided through an inclined chute 61 to the outside of the machine base 11 of the high-speed thread rolling machine 10. By the way, at the end of the movement of the slider 28 in the direction of the arrow A, the opening 43 of the relay plate member 40 and the material feeding device 4 are connected to each other.
5 are aligned with the material receiving portion 47 of the relay plate member 4.
0 falls into the material receiving part 47 of the material feeding device 45, but the movement of the slider 28 in the direction of arrow A is caused by the opening 4
3 and the material receiving part 47, the direction of the movement of the slider 28 is changed in order to accurately drop and insert the material M from the closing opening 43 into the material receiving part 47. It is desirable to allow time for this.

In order to achieve this purpose, in one embodiment of the high-speed thread rolling machine of the present invention, as shown in FIG. A coil spring 66 is disposed on the shaft 65 between the support device 42 and a part of the machine base 11, and the support device 42 is moved along the guide rod 67 fixed to the part of the machine base 11 in the direction of the arrow. It is mounted so that it can be moved in the direction of A.

The support device 42 is provided with a suitable protrusion 68 and is fitted with an adjustable screw 69. On the other hand, the arrow A of the slider 28
A suitable elastic member, such as a coil spring 70, is attached to the side end.
A block section 71 is attached so that it can slide.

From the above-described structure, when the slider 28 moves in the direction of arrow A and the block member 71 of the slider 28 is in a position where the gate 43 of the relay slope member 40 and the material receiving part 47 of the material feeding device 45 are aligned, an end surface of which contacts the end of the adjustable screw 69 of the relay plate member support device 42;
Furthermore, if the slider 28 is set to move in the direction of arrow A, the opening 4
3 and the material receiving portion 47 as desired, the insertion time of the material M from the opening □43 of the IJ race slope member 40 into the receiving portion 47 of the material feeding device 45 can be extended. can. In addition, IJ Le Itabe Village 40
The material M. is injected into the opening □43. In order to more precisely insert the material into the receiving part 47 of the material feed device 46, a compressed air injection device 75 is arranged adjacent to the block member 37 of the material feed head 35. The injection device 75 is provided with an upright injection nozzle 76 whose upper end is connected via a suitable conduit 77 to a source of compressed air (not shown in the figures). When the end surface of the slider 28 comes into contact with the relay plate support device 42, that is, at the position where the opening □ 43 of the relay slope member 40 and the receiving part 47 of the material feeding device 45 coincide, compressed air is injected from the nozzle 76 and the slider 28 in the direction of arrow A, aligning the nozzle 76 with the opening 43 and the receiving part 47, and by a jet of compressed air from the nozzle 76,
The material M is actively fed into the receiving section 47. As described above, the material M is transferred from the gate 43 of the relay plate member 40 into the material receiving portion 47 of the material feeding device 45.
, falls and is inserted, the opening □ 43 becomes empty and a device for preventing the material M accommodated in the hole 38 of the material supply head 35 from falling into the material receiving part 47 is provided. can be provided.

As shown in Fig. 9, this material fall prevention device is as follows:
A vertical arm 81 of the L-shaped member 80 is movably attached to the supply head 35 by a guide pin 82, and the L-shaped member 8
A bottom arm 83 of the 0 extends to the underside of the supply head 35.

This L-shaped member 80 is formed by suitable means such as a spring 84.
Normally, the bottom arm 83 opens the hole 37 of the supply head 35. On the other hand, a pressing member 85 is provided protruding from an appropriate part of the slider 28, and when the slider 28 moves in the direction of arrow A and the hole 37 of the supply head 35 and the material receiving part 47 of the material feeding device 45 are aligned, The pressing part 85 presses the arm 81 of the L-shaped part 80 against the force of the spring 84,
The bottom arm 83 closes the opening of the hole 37 of the head 35 to prevent the material M from falling downward. As mentioned earlier, the material M rolled between the flat dies 17 and 18 falls down into the receiver 6 and is sent out to the outside. A compressed air injection device 90 can be arranged above the location of the receiver 60. As explained in detail above, in the high-speed unreliable thread rolling device of this invention, the pair of flat dies 17 and 18 reciprocate linearly in opposite directions. Even if the length of the flat dies 17 and 18 is increased, the operating stroke can be shortened, and the diameter of the material to be rolled is small. Can be molded without increasing the pressure applied to the material. Although the preferred embodiments of the high-speed headless thread rolling device of the present invention have been described above, the device of the present invention can be implemented with various modifications within the technical content described in the claims. be.

[Brief explanation of the drawing]

Fig. 1 is an elevational view showing the entire high-speed unreliable thread rolling device of the present invention, Fig. 2 is a partially cutaway plan view showing the main parts, and Fig. 3 is a view of the material supply head. FIG. 4 is a partially cutaway cross-sectional view showing the raceway slope member support device; FIG. 4 is a schematic cross-sectional view illustrating the relationship between the material supply head and the raceway slope member;
Fig. 5 is a plan view showing the material feeding device, and Fig. 6 is a plan view showing the material feeding device.
A schematic sectional view taken along the line - in the figure in the direction of arrow A, Fig. 7 is a partial sectional view showing the relationship between the opening □ of the relay plate member and the material receiving part of the material feeding device, and Fig. 8 is a compression FIG. 9 is a partial cross-sectional view illustrating the relationship between the air injection nozzle and the material receiving part, and FIG. 9 is a schematic diagram showing the material fall prevention device. The relationship between the symbols and the rhombus in the attached drawings is as follows. 10... High-speed unreliable screw rolling device, 11... Machine base, 1
2... Material supply device, 17, 18...
Flat die, 20, 28...Slider, 30, 31...Chain gear, 32, 33...Chain, 35...
...Material supply head, 40...Relay slope member,
41... Material receiving plate, 42... Relay slope member support device, 43... Relay plate opening □, 45...
・Material feeding device, 47... Material receiving section, 57... Cam follower, 58... Cam plate, 76... Compressed air injection/slip, 80...
...L-shaped member of material fall prevention device. Figure 1 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 9 Figure 2 Figure 8

Claims (1)

[Scope of Claims] 1. A machine base, a material supply device that accommodates a large number of materials for rolling headless screws, a material supply head that receives materials from the material supply device in alignment, and a device for taking out a piece of material from the material supply head; a material feed device for inserting the material from the material take-out device between a pair of flat dies; (a) actively reciprocates one of the pair of flat dies in the longitudinal direction of the machine base by rotation of a main shaft; (b) a device that causes the other flat die to reciprocate in the longitudinal direction of the machine base in a counter-reciprocating manner to the one flat die in accordance with the movement of the one flat die; ) A plate member having the material extraction device mounted on the machine base and having an opening for receiving only one of the materials, and a material receiving plate disposed below the plate member and reciprocating together with the other flat die. (d) The material feeding device is attached adjacent to the other flat die, and a material receiving part is provided between the end of the other flat die, and The material in the opening is fitted into the material receiving part by injecting compressed air at a position where the material receiving part and the opening of the material taking out device are aligned by movement of the die. High-speed headless thread rolling equipment. 2. The device for reciprocating the other flat die includes a pair of chain gears and a chain that cooperates with each of the chain gears,
One end of each of the chains is connected to the end of the one flat die, and the other end of the chain is connected to the end of the other flat die, and according to the reciprocating movement of the one flat die. 2. The high-speed headless thread rolling apparatus according to claim 1, wherein said other flat die is reciprocated in a direction opposite to said other flat die.