JP2014000583A - Thread rolling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce malfunction and noise due to vibration of a thread rolling device by suppressing vibration of a device body, and to improve productivity by a compact structure.SOLUTION: A thread rolling device includes a thread rolling section 40 rolling a thread to a screw stock and a screw stock supply section 30 feeding screw stocks one by one to the thread rolling portion 40 in a device body 10. The thread rolling section 40 includes a fixed die receiving rolling pressure when rolling the thread, a movable die which is reciprocated in an oblique direction by a crankshaft to roll the thread to the screw stock between the movable die and the fixed die, and a drive section 40 driving the crankshaft. The movable die is fixed to a slider which is formed by an aluminum alloy.

Description

  The present invention relates to a thread rolling device including a thread rolling section having a fixed die and a moving die that reciprocates.

  Conventionally, a thread rolling device that performs thread rolling with a fixed die attached to a base by reciprocating a moving die, reciprocates the moving die to perform thread rolling on a bolt material one by one. There was a problem of low.

  For this reason, flat dies composed of a fixed die and a moving die are arranged in a staggered manner with the ram in between, and when the ram advances, one flat die performs thread rolling, and when the ram moves backward, the other flat die There is one that can perform thread rolling with a die and perform thread rolling on two bolt materials by one reciprocation of a ram, thereby improving productivity (Patent Document 1).

Japanese Patent Laid-Open No. 11-151545

  However, in this case, the set-up work at the time of rolling is performed on the fixed die side, but since flat dies are arranged in a staggered pattern, the work must be moved to the opposite side, and workability is poor. Since a setup adjustment space is also required on the opposite side, a large work space is required. For this reason, it is preferable to improve the productivity by increasing the speed at which the moving die is reciprocated without arranging the flat dies in a staggered manner, but by reciprocating the moving die at a high speed, There is a risk that vibration will increase, causing malfunction due to shaking of the device, and causing noise.

  The present invention has been made in view of the above points, and by suppressing vibration of the apparatus main body, it is possible to reduce malfunctions and noise due to apparatus shaking, and to improve productivity with a compact structure. An object is to provide a rolling device.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 is a thread rolling portion that rolls a screw to a screw material,
A screw material supply unit that feeds one screw material into the thread rolling unit one by one;
The thread rolling part is
A fixed die that receives rolling pressure when rolling the screw;
A moving die that is reciprocated in a diagonal direction by a crankshaft, and for rolling a screw on the screw material between the fixed die,
A drive unit for driving the crankshaft,
The moving die is fixed to a slider;
In the screw rolling device, the slider is an aluminum alloy.

  The invention according to claim 2 is the screw rolling device according to claim 1, wherein the center of gravity of the device main body is set at a position below the thread rolling portion.

In the invention according to claim 3, the proportion of the weight distribution of the apparatus main body is:
The lower part excluding the thread rolling part is 6-8,
The screw rolling device according to claim 1, wherein an upper portion including the thread rolling portion is 4 to 2.

The invention according to claim 4 is provided with a weight for preventing vibration of the device in the device body,
The thread rolling device according to any one of claims 1 to 3, wherein the weight is disposed at a position below the thread rolling portion.

  With the above configuration, the present invention has the following effects.

  In the first aspect of the present invention, the apparatus main body is provided with a screw rolling part that rolls a screw into the screw material, and a screw material supply part that feeds one screw material into the screw rolling part. The part includes a fixed die that receives a rolling pressure when rolling the screw, a moving die that is reciprocated in a slanting direction by the crankshaft, and rolls the screw into the screw material between the fixed die and the crank. A moving die fixed to the slider, and the slider is made of an aluminum alloy. Even if the moving die is reciprocated at a high speed by the driving portion, the slider is made of an aluminum alloy. Thus, it is possible to suppress the vibration of the apparatus main body, reduce malfunctions and noise caused by the shaking of the apparatus, and improve productivity with a compact structure.

  According to the second aspect of the present invention, the vibration of the apparatus main body can be suppressed by setting the gravity center position of the apparatus main body to a position below the thread rolling portion and lowering the gravity center position of the apparatus main body.

  In the invention according to claim 3, the proportion of the weight distribution of the apparatus main body is 6 to 8 in the lower part excluding the thread rolling part, and 4 to 2 in the upper part including the thread rolling part. By lowering the position of the center of gravity of the main body, vibration of the apparatus main body can be suppressed.

  In the invention according to claim 4, the apparatus main body is provided with a weight for preventing vibration of the apparatus, the weight is disposed below the thread rolling portion, and the apparatus main body has a simple structure with the weight. By lowering the position of the center of gravity, vibration of the apparatus main body can be suppressed.

It is a perspective view of a screw rolling device. It is a perspective view of a parts feeder and a screw raw material supply part. It is a top view of a screw raw material supply part and a screw rolling part. It is a disassembled perspective view of the drive part of a screw rolling part. It is a disassembled perspective view of a moving die. It is a figure which shows the sending-out state of the screw raw material supply part from a parts feeder. It is a figure which shows the state before the screw rolling of a screw raw material. It is a figure which shows the state of the screw rolling of a screw raw material. It is a figure which shows the screw rolling operation | movement of a screw rolling part. It is a figure which shows the relationship between the rotation speed of a screw rolling apparatus, and the vibration value of an apparatus main body.

  Hereinafter, embodiments of the thread rolling device of the present invention will be described. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.

  The thread rolling device of this embodiment will be described with reference to FIGS. 1 is a perspective view of a screw rolling device, FIG. 2 is a perspective view of a parts feeder and a screw material supply unit, FIG. 3 is a plan view of the screw material supply unit and the screw rolling unit, and FIG. 4 is a drive of the screw rolling unit. FIG. 5 is an exploded perspective view of the moving die, FIG. 6 is a view showing the state of feeding the screw material supply unit from the parts feeder, and FIG. 7 is a view showing a state before screw rolling of the screw material, FIG. 8 is a diagram showing the thread rolling state of the screw material, FIG. 9 is a diagram showing the screw rolling operation of the screw rolling unit, and FIG. 10 is a diagram showing the relationship between the rotational speed of the screw rolling device and the vibration value of the device main body. FIG.

[Overall configuration of thread rolling device]
As shown in FIG. 1, the screw rolling device 1 of this embodiment includes a part feeder 20, a screw material supply unit 30, a screw rolling unit 40, and an oil tank unit 50 in the device main body 10. The part feeder 20, the screw material supply unit 30, and the screw rolling unit 40 are disposed on the upper portion of the apparatus body 10. The screw rolling unit 40 is located in the center, and the screw material is transferred from the part feeder 20 to the screw material supply unit 30. The screw materials are supplied one by one, aligned by the screw material supply unit 30, and fed into the screw rolling unit 40 one by one at a predetermined timing. An oil tank portion 50 is disposed on the upper front side of the apparatus main body 10, and oil stored in the oil tank portion 50 is supplied to the cutting portion of the fixed die 41 and lubricated.

The apparatus main body 10 includes a drive source for driving the parts feeder 20, a drive source for driving the screw material supply unit 30, a drive source for driving the screw rolling unit 40, a drive source for driving the oil tank unit 50, and the like. A control device for controlling the driving source is arranged (not shown).
An iron plate 11 is used for the bottom plate of the apparatus main body 10, thereby constituting a weight having a predetermined weight. Further, an iron plate 12 is provided at the lower portion of the oil tank portion 50, thereby constituting a weight having a predetermined weight. Further, an iron plate 13 is provided inside the apparatus main body 10, thereby constituting a weight having a predetermined weight.

[Parts feeder]
As shown in FIGS. 1, 2, and 6, the parts feeder 20 is disposed on the upper portion of the apparatus body 10 and includes a storage portion 21 and a vibration portion 22. A conveying groove 23 is formed in a spiral shape from the bottom to the top inside the storage unit 21, and the screw material P stored in the storage unit 21 is vibrated by vibrating the vibration unit 22 by a motor of a drive source. Enters the conveying groove 23. Then, the screw material P is suspended by supporting the head of the screw material P in the spiral conveyance groove 23 by vibration, and in this state, the screw material P is aligned in a line along the conveyance groove 23. The screw material P is supplied to the screw material supply unit 30 from the uppermost part.

[Screw material supply section]
1, 2, 3, and 7 to 9, the screw material supply unit 30 includes a chute rail 31 and a chute rail presser 32, aligns the screw materials P in a row, and obliquely below And the screw material P is fed into the thread rolling portion 40 one by one.

  In this embodiment, the chute rail 31 is disposed with an inclination of, for example, 30 degrees. The chute rail presser 32 is supported by a support screw 33 at a distance from the chute rail 31. A support shaft 34 is provided at the lower end portion of the chute rail presser 32, and a screw material presser 35 is rotatably provided with the support shaft 34 as a fulcrum.

  The screw material holder 35 is provided with an adjustment screw 36, and the tip of the adjustment screw 36 abuts the chute rail 31, and the pressing portion 35 a of the screw material holder 35 causes the head of the screw material P to be moved by the adjustment screw 36. Adjust the interval between pressing positions. A coil spring 37 is attached to the shaft portion of the support shaft 34, one end portion 37a is locked to the screw material presser 35, and one end portion 37b is locked to the screw material presser 35 so that the screw material presser 35 is always screwed. The material P is urged so as to hold the head of the material P.

  The chute rail 31 is suspended while supporting the head of the screw material P, and the chute rail holder 32 is arranged in a row along the chute rail 31 in a state in which the head of the screw material P is prevented from being lifted. The screw materials P are aligned, moved obliquely downward, and the screw material P is fed into the thread rolling unit 40 from the feeding unit 38 one by one.

  The feeding portion 38 includes a lateral pressing plate 38a, a vertical pressing plate 38b, and a pressing pin 38c. The horizontal pressing plate 38a is movably disposed between the tip end portion of the chute rail 31 and the fixed die 41 of the screw rolling portion 40, and the vertical pressing plate 38b is arranged between the side portion of the chute rail 31 and the screw rolling portion 40. It is arranged so as to be movable between the moving die 42. The push pin 38c is formed so as to enter between the most advanced screw material P with the tip end portion 38c1 aligned and the next screw material P, and is disposed so as to be movable in the same direction as the lateral push plate 38a.

  As shown in FIG. 8, the operation of the feeding portion 38 is such that the lateral pressing plate 38a is stopped at the advanced position, and at this time, the screw material P is fed from the feeding passage 38d by the lateral pressing plate 38a. The vertical push plate 38b moves forward to push the screw material P, the push pin 38c stops at the retracted position, and the moving die 42 starts moving forward (FIG. 8A).

  The vertical push plate 38b moves forward to close the outlet of the feed passage 38d and stops, and the moving die 42 moves forward to roll the screw into the screw material P with the fixed die 41. At this time, the push pin 38c moves forward, and the lateral push plate 38a moves backward (FIG. 8B).

The vertical push plate 38b moves forward to close the outlet of the feed passage 38d and stops, and the horizontal push plate 38a stops at the reverse position to open the entrance of the feed passage 38d. The push pin 38c moves forward and enters between the most advanced screw material P in which the tip end portion 38c1 is aligned and the next screw material P. As a result, the most advanced screw material P is pushed out by the tip end portion 38c1 of the push pin 38c and enters the feed passage 38d, and the moving die 42 starts to move backward (FIG. 8C).
The vertical push plate 38b moves forward to block the outlet of the feed passage 38d and stops, and the horizontal push plate 38a moves forward to move the screw material P in the feed passage 38d toward the outlet. The push pin 38c starts moving backward, and the moving die 42 moves backward (FIG. 8D).

  The vertical push plate 38b moves backward to open the outlet of the feed passage 38d, the horizontal push plate 38a moves forward, the screw material P of the feed passage 38d is fed from the outlet, the moving die 42 is located at the reverse position, and the push pin 38c is It is in the reverse drive position (FIG. 8 (e)).

[Thread rolling part]
As shown in FIGS. 3 to 5, the screw rolling unit 40 includes a fixed die 41, a moving die 42, and a drive unit 43, and rolls a screw on the screw material P. The fixed die 41 is fixed to the fixed block 41a by a presser 41b, a bolt 41c, and the like. The fixed block 41a is attached to the apparatus main body 10 and receives a rolling pressure when rolling a screw. The moving die 42 is fixed to the slider 42a by a presser 42b, a bolt 42c, and the like. A threaded groove 42d is formed on the processing surface of the moving die 42, and a screw is rolled into the screw material P with the fixed die 41. To do. The slider 42a is made of an aluminum alloy, is lightened, and is slidably provided on the apparatus main body 10. In this embodiment, the surface of the aluminum alloy is plated.

  The drive unit 43 drives the crankshaft 43a. A connecting pin 43d is rotatably inserted into the distal end portion 43b of the crankshaft 43a via a sleeve 43c. The connecting pin 43d is fixedly connected to the slider 42a by a bolt 43e. An eccentric bush 43g, a sleeve 43h, a rotating cylinder 43i, and a bolt 43j are inserted into the connecting rod 43f of the crankshaft 43a. The bolt 43j is attached to the flywheel 43k and fixedly connected thereto by a bolt 43l. The flywheel 43k is fixed to the front end portion of the drive shaft 43m by a bolt 43n. The distance between the connecting pin 43d and the bolt 43j is adjusted by rotating the eccentric bush 43g, thereby adjusting the positions of the fixed die 41 and the moving die 42.

  A drive pulley 43o is fixed to the drive shaft 43m, and a rotational force is transmitted to the drive pulley 43o from a drive source such as a motor via a belt 43p. The rotational force from the drive source such as a motor is transmitted to the drive pulley 43o via the belt 43p, and the flywheel 43k is rotated by rotating the drive shaft 43m, and the moving die 42 is reciprocated in the oblique direction by the crankshaft 43a. Then, the screw is rolled into the screw material P with the fixed die 41.

  In this embodiment, the slider 42a is made of an aluminum alloy, is reduced in weight, and is slidably provided on the apparatus main body 10. Thus, the center of gravity of the apparatus main body 10 is set at a position below the thread rolling portion 40. Even if the moving die 42 is reciprocated at a high speed by the drive unit 40, the slider 42a is made of an aluminum alloy, so that the vibration of the apparatus body 10 can be suppressed, It is possible to reduce noise and improve productivity with a compact structure.

  Further, an iron plate 11 is used for the bottom plate of the apparatus main body 10, thereby forming a weight having a predetermined weight, and an iron plate 12 is provided at the lower portion of the oil tank portion 50, thereby having a predetermined weight. A weight is formed, and an iron plate 13 is provided inside the apparatus main body 10, thereby forming a weight having a predetermined weight, and the apparatus main body 10 is provided with a weight for preventing vibration of the apparatus. Is located below the screw rolling part 40, and the center of gravity of the apparatus main body 10 is set below the screw rolling part 40, so that vibration of the apparatus main body 10 can be suppressed.

  The ratio of the weight distribution of the apparatus main body 10 is 6 to 8 in the lower part excluding the thread rolling part 40, and 4 to 2 in the upper part including the thread rolling part 40. The vibration of the apparatus main body 10 can be suppressed.

  Next, the slider 42a is formed of an aluminum alloy, is reduced in weight, and is provided so as to be slidable on the apparatus main body 10, whereby the center of gravity of the apparatus main body 10 is set to a position below the thread rolling portion 40. FIG. 10 shows the vibration of the apparatus main body 10 and the vibration of the apparatus main body 10 of the comparative example in which the slider 42a is formed of a casting.

  In the comparative example, the slider was formed of a casting, and the weight was 1500 g. In the example, the slider was formed of an aluminum alloy, and the weight was 580 g.

  In the comparative example, vibration values were measured at a drive shaft rotation speed of 700 R / min and a drive shaft rotation speed of 900 R / min (FIGS. 10A and 10B). When the rotational speed of the drive shaft is 700 R / min, the average vibration value is 1.26 g. When the rotational speed of the drive shaft is 900 R / min, the average vibration value is 1.56 g. When the rotational speed is increased, the vibration value increases. Become.

  In the example, the vibration value was measured at a rotational speed of the drive shaft of 1000 R / min (FIG. 10C). At a drive shaft speed of 1000 R / min, the vibration value average is 1.25 g. Even when the drive speed is increased, the vibration value average at a drive shaft speed of 700 R / min in the comparative example is substantially the same as 1.26 g. there were. Therefore, by suppressing the vibration of the apparatus main body, it is possible to reduce malfunctions and noise caused by the apparatus shaking, and to improve productivity with a compact structure.

Also, an iron plate is used for the bottom plate of the device body, an iron plate is provided at the lower part of the oil tank, an iron plate is provided inside the device body, the weight is positioned below the thread rolling portion, and the center of gravity of the device body Similarly, in the example in which was set at a position below the thread rolling portion, the vibration value could be suppressed even if the rotational speed was increased.
Also, the proportion of the weight distribution of the apparatus main body is the same as that of the apparatus main body in the embodiment in which the lower part excluding the thread rolling part is 6 to 8 and the upper part including the screw rolling part is 4 to 2. Vibration could be suppressed.

  The present invention can be applied to a screw rolling device including a screw rolling part having a fixed die and a reciprocating moving die, and suppresses vibrations of the device main body, thereby reducing malfunctions and noise caused by shaking of the device, and is compact. With a simple structure, it is possible to improve productivity.

DESCRIPTION OF SYMBOLS 1 Screw rolling apparatus 10 Apparatus main body 11, 12, 13 Iron plate 20 Parts feeder 21 Storage part 22 Vibration part 23 Groove part 30 Groove | groove 30 Screw raw material supply part 31 Chute rail 32 Chute rail press 38 Feeding part 40 Screw rolling part 41 Fixed die 41a Fixed block 42 Moving die 42a Slider 43 Drive part 43a Crankshaft 50 Oil tank part P Screw material

Claims (4)

A thread rolling part that rolls a screw on a thread material;
A screw material supply unit that feeds one screw material into the thread rolling unit one by one;
The thread rolling part is
A fixed die that receives rolling pressure when rolling the screw;
A moving die that is reciprocated in a diagonal direction by a crankshaft, and for rolling a screw on the screw material between the fixed die,
A drive unit for driving the crankshaft,
The moving die is fixed to a slider;
The screw rolling device, wherein the slider is an aluminum alloy.   The thread rolling device according to claim 1, wherein the center of gravity of the device body is set at a position below the thread rolling portion. The proportion of weight distribution of the device body is:
The lower part excluding the thread rolling part is 6-8,
The screw rolling device according to claim 1, wherein an upper portion including the thread rolling portion is 4 to 2. The device body includes a weight for preventing vibration of the device,
The thread rolling device according to any one of claims 1 to 3, wherein the weight is disposed at a position below the thread rolling portion.