JPH0341874Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) This invention is a differential speed type in which thread rolling is performed by rotating one round die at different speeds and in the same direction. This relates to rolling machines.

(Prior art) Conventionally, as for the differential speed rolling machine as mentioned above,
There is one described in Japanese Patent Publication No. 28-4461.

This differential speed rolling machine has a pair of round dies that rotate in the same direction and at different speeds and is arranged side by side in an upright manner, so that the threads formed on each of the pair of round dies are in phase with each other. Sometimes, the material is fed between the pair of round dies by a material supply mechanism.

As shown in FIGS. 6 and 7, the material feeding mechanism includes a plurality of (two in FIG. 6) pivots on the boss portion 101a of one of the pair of round dies 101, 102. Pinion 103 arrived,
103, a feed ring 104 formed with internal teeth 104a that mesh with these pinions 103, 103 and a large number of notches 104b for feeding the material, and an escape ring 105 that formed with internal teeth 105a that mesh with the pinions 103, 103, The feed ring 104 is designed to cover the thread 101b of the round die 101 on one side with its inner teeth 104a meshed with the pinions 103, 103, and the feed ring 104 covers the thread 101b of the round die 101 on one side. The ring 105 has its internal teeth 105a meshed with the pinions 103, 103 above the feed ring 104 in FIG.

In this case, the escape ring 105 has a locking piece 105b protruding toward the outer circumference of the die frame 1.
06, and the rotation of the circular die 101 on the one side in the rotational direction (in the direction of the arrow in FIG. 7) is regulated. , thereby causing the feed ring 104 to move toward the pinion 10
3, 103 at a predetermined speed (a pair of round dies 101, 102) together with the round die 101 on one side.
The feed ring 1 rotates at a speed that is half the peripheral speed difference of
Material 10 held by notch 104b of 04
0 is pushed between the pair of round dies 101 and 102. In addition, the escape ring 1
A relief spring 108 in a compressed state is provided on the lower surface of the locking piece 105b in FIG. In addition, the feed ring 104 is unavoidable during thread rolling.
A temporary delay in the rotational speed of the pair of round dies 101, 1 is absorbed through the escape ring 105.
This is done so as not to cause any trouble to the drive mechanism of 02. Further, the escape spring 108 uses its elastic force to return the feed ring whose rotational speed has temporarily decreased to the normal rotational position, so that the timing for pushing the subsequent material 100 is not deviated.

Note that the reference numeral 109 in FIG. 7 is a material conveyance path.

(Problems to be solved by the invention) However, in the conventional differential speed rolling machine described above, the components of the material feeding mechanism are arranged in a concentrated manner in the round die 101 on one side. Therefore, the structure is complicated, and maintenance of the material feeding mechanism is not easy.

In addition, the differential speed rolling machine described above absorbs a temporary delay in the rotational speed that occurs in the feed ring 104 of the material feeding mechanism during thread rolling, and returns the feed ring 104 to the normal rotational position. Since the relief ring 105 and relief spring 108 are used as a means for thread rolling, for example, there may be slight irregularities in shape and hardness of each material 100, and the feed ring 1 during thread rolling may be slightly uneven.
Temporary feed rate of 04 rotation speed is 100 for each material
If the escape spring 10 is different depending on
8 is not constant, the feed ring 104 may not be able to return to its normal rotational position, and as a result, the following material 100
However, there was a problem in that the timing of pushing between the pair of round dies 101 and 102 may be incorrect, resulting in defective products.

(Purpose of the invention) This invention was made by focusing on the above-mentioned problems, and it not only makes maintenance and management of the material feeding mechanism easier, but also improves the timing of pushing the material between a pair of round dies. It is an object of the present invention to provide a differential speed rolling machine that can prevent problems such as screws falling down due to deviation or material being thrown off by a die.

[Structure of the invention] (Means for solving the problem) This invention consists of a pair of round dies that rotate at different speeds and in the same direction, and a material feeder that feeds the material between the pair of round dies. In a differential speed rolling machine equipped with a mechanism, the pair of round dies are arranged horizontally, and the material feeding mechanism is arranged in the same plane as the pair of round dies and in the arrangement direction of the pair of round dies. an actuator that forcibly pushes the material between the pair of round dies from a direction orthogonal to the pair of round dies; A rotating signal block is provided to be rotatable in accordance with the rotation path of the signal block, and detects the timing when the phases of a pair of round dice match when the signal block approaches, and sends an operation signal to the actuator. It is characterized by being equipped with a switch for controlling the timing of material pushing to be output.

In this case, the actuator may be an air cylinder or a hydraulic cylinder, but it is more desirable to use an air cylinder that can push the material more flexibly.

(Example) This invention will be explained below based on the drawings.

1 to 5 show a differential speed rolling machine according to an embodiment of this invention.

That is, this differential speed rolling machine 1 mainly has the following features:
It consists of a drive section 2, a rolling section 20, and a material feeding mechanism.

As shown in FIG.
A motor 3 and a speed reducer 4 are provided inside the motor 3 surrounded by c. These motors 3 and reducers 4
is provided so that the respective output shafts 3a and input shafts 4a are parallel to each other and the distance between both shafts 3a and 4a can be adjusted, and an imaginary The output of the motor 3 is transmitted to the speed reducer 4 by passing a belt 6 shown by the line. An output sprocket 7 is attached to the output shaft 4b protruding from the upper surface of the reducer 4 (the front side in FIG. 2), and a first sprocket 8 and a second sprocket are provided on the same plane as the output sprocket 7. A chain 10 shown by a phantom line is extended over the motor 9 to transmit the output of the motor 3. In this case, the first and second sprockets 8 and 9 are both attached to the lower end portions of die shafts 21 and 21 of the rolling portion 20, which will be described later, and have different numbers of teeth, so that the die shafts 21, 21 rotate in the same direction but at different speeds.

Further, in FIG. 2, reference numeral 11 denotes an idle sprocket of an idler (not shown), which is located in the same plane as the sprockets 7, 8, and 9, and extends across the sprockets 7, 8, and 9. The tension of the chain 10 can be adjusted.

The rolled portion 20 is shown in FIGS. 1, 4, and 5.
As shown in the figure, a guide plate 23 is provided on the bed 2a that is separated from the drive section 2, and stoppers 24, 24 that extend upward from the bed 2a.
and two guide bars 25, 25 facing the guide plate 23 provided across the upper end portions of these stoppers 24, 24 in FIG. The die shafts 21, 2
A pair of round dies 26, 26 supported by 1 are horizontally arranged and attached via bar slides 27, 27 and plate slides 28, 28. In addition, in FIGS. 4 and 5, the first
Only the left side of the rolled portion 20 in the plan view of the figure is shown.

As shown in FIGS. 4 and 5, on the upper surface of the guide plate 23, a substantially concave slide body receiving portion 23a is formed along the longitudinal direction, and at the mounting position of the round die 26. Correspondingly,
Two shaft holes 23b are provided through which the die shaft 21 is inserted with a sufficient margin. Note that FIG. 4 shows only one shaft hole 23b. Then, the slide body receiving portion 2 of this guide plate 23
3a, the lower end of the plate slide body 28 in FIG. , is adapted to slide along the slide body receiving portion 23a, and nuts 29a, 30a
The position is fixed by tightening. Further, this plate slide body 28 is formed with a shaft insertion hole 28a that corresponds to the shaft hole 23b of the guide plate 23 and into which the die shaft 21 is inserted with a sufficient margin. A self-aligning roller bearing 31 is provided on the upper side (on the side opposite to the guide plate 23).

Then, such a plate slide body 28
As shown in FIG. 1, a pair of round dies 26,
Two sets are provided corresponding to the round dies 26, and the round dies 26, 26 can be moved close to each other and separated from each other by the above-mentioned mutual sliding movement.

On the other hand, as shown in FIG.
5a and 25a, and the bar slide body 27 is fitted between these without any gap. Similar to the plate slide body 28, this bar slide body 27 is constructed by operating a push bolt 33 and a pull bolt 34 provided on the stopper 24, as shown in FIG. The bar slide body 27 can be slid along the portion 25a, and the sliding position can be fixed by tightening the nuts 33a and 34a. A self-aligning roller bearing 35 is provided corresponding to the self-aligning roller bearing 31 provided in the.

Further, as shown in FIG. 1, two sets of bar slide bodies 27 are disposed on the guide bars 25, 25, so that a pair of round dies 26, 26 are spaced close to each other.

As shown in FIGS. 4 and 5, the round die 26 connects the upper end of the die shaft 21 in FIG. The bar slide body 27 is supported by the self-aligning roller bearing 35, and the part from the approximate center to the bottom end in FIG. It is installed on. That is, the die shaft 21 is allowed to have a slight inclination with respect to the bar slide body 27 and the plate slide body 28 by the self-aligning roller bearings 35 and 31, and the slide bodies 27, 28
are the guide bar 25 and the guide plate 23, respectively.
Since the upper part is slidable, when installing the pair of round dies 26, 26 into the frame, the distance between the pair of round dies 26, 26 must be adjusted, and the guide plate of the die shafts 21, 21 must be adjusted. 23 can be adjusted easily and accurately. In this case, the round die 26 has an annular locking portion 21a formed approximately at the center of the die shaft 21, and ring nuts 36, 36 provided at the upper end of the die shaft 21 in FIG. A bearing cover 37, a die collar 38, a round die 26, a die spacer 39, and a washer 40 are fitted in order from below and are firmly fixed. Further, the die shaft 21 to which the round die 26 is fixed in this manner holds the inner race 31a of the self-aligning roller bearing 31 provided on the plate slide body 28 with the annular locking portion 21a and the ring nut 41. It is placed in a sandwiched state via a spacer 42, and is prevented from moving in the vertical direction in FIG. 4 with respect to the plate slide body 28, that is, the guide plate 23.

Note that 43 and 44 in FIGS. 4 and 5 are blocks and clamps for fixing the bar slide body 27 and plate slide body 28 to the guide bar 25 and the guide plate 23, respectively, and 45 and 46 are , a self-aligning roller bearing 3 provided on each of the slide bodies 27 and 28;
5 and 31 are each a bearing fixing plate to prevent them from coming off.

As shown in FIG. 1, the material feeding mechanism includes an air cylinder 51 as an actuator that pushes the material W between the pair of round dies 26, 26. This air cylinder 51 is attached to a plate 52 provided on the bed 2a of the rolled portion 20.
It is fixed via cylinder brackets 53, 53, and in this case, the air cylinder 51 is configured such that its cylinder rod 54 moves horizontally and in a direction perpendicular to the arrangement direction of the pair of round dies 26, 26. It is fixed as . On the rolled portion 20 side of the air cylinder 51, opposing plate-shaped guide springs 55, 55 are provided.
is in a direction perpendicular to the arrangement direction of the pair of round dies 26, 26, and one end 55a, 55 of these
a are provided so as to face between the round dies 26, 26, respectively, and a feed blade 56 attached to the tip 54a of the cylinder rod 54 moves these guide springs 55 as the air cylinder 51 pushes out. , 55, the material W supplied to the guide springs 55, 55 through a linear feeder 70 (described later) is forcibly pushed between the pair of round dies 26, 26. (the state shown by the imaginary line in FIG. 1).

Further, the material feeding mechanism may be arranged as shown in FIGS.
As shown in the figure, a first signal sprocket 57 is attached to the output shaft 4b of the speed reducer 4 together with the output sprocket 7, and is connected in the same plane as this through a chain 58 shown in phantom lines in FIG. A second signal sprocket 59, a signal block 61 provided protruding in the diametrical direction on a sprocket shaft 60 with the second signal sprocket 59 fixed to one end 60a, and a signal block 61 provided when the approach of the signal block 61 is detected. It is equipped with a proximity switch 62 for controlling the timing of material pushing through which current flows.

The first and second signal sprockets 57, 5
9 sets the number of teeth and diameter of each of the pair of round dies 26, 26 so that the phases of the threads of the pair of round dies 26, 26 consistently match each time the second signal sprocket 59, that is, the sprocket shaft 60 rotates once. are doing.

The signal block 61 is located on the other end (upper end in FIG. 3) 60b side of the sprocket shaft 60;
The b side protrudes upward from a through hole 2b formed on the right side of the bed 2a in FIG. 1, and is supported as described later. In the through hole 2b,
A cylindrical member 63 having a bottom portion 63a is connected to the bottom portion 6.
A flanged bushing portion 63 formed on the outside of 3a.
The sprocket shaft 60 is fitted with the signal block 61 into the shaft through hole 63c provided in the bottom 63a of the cylindrical member 63.
The other end 60b including the cylindrical member 63 is supported through two roller bearings 64, 64 with the other end 60b protruding into the interior of the cylindrical member 63. In this case, between the stepped portion 60c formed on the other end 60b side of the sprocket shaft 60 and the shaft through hole 63c, and between the second signal sprocket 59 and the shaft through hole 6.
3c, there are thrust ball bearings 65, 65, respectively.
is provided, and the sprocket shaft 60 is fixed in the axial direction so as not to cause any hindrance to its rotation.

The proximity switch 62 consists of a head 62a, a threaded part 62b, and a detection part 62c, and the threaded part 62b is screwed into a switch mounting hole 66a formed in an operation cover 66 that closes an opening 63d of the cylindrical member 63. It is fixed at The operation cover 66 has an annular projection 66b, and the annular projection 66b is fitted into an annular step 63e formed in the opening 63d of the cylindrical member 63 to close the opening 63d. It is set as. In this case, the detection portion 62c of the proximity switch 62 is located inside the cylindrical member 63 above the rotation path of the signal block 61 that rotates together with the sprocket shaft 60. Then, the operation cover 66
is rotatable relative to the cylindrical member 63, so that the detection portion 62c of the proximity switch 62 can be rotated along the rotation path of the signal block 61.

That is, while the signal block 61 rotates once by the output of the motor transmitted via the first and second signal sprockets 57 and 59, the shapes formed on the pair of round dies 26 and 26, respectively, are By ensuring that the phases of the screw threads are constantly matched, and by rotating the operation cover 66 and installing the detecting section 62c of the proximity switch 62 above the current position of the signal block 61,
It is possible to accurately detect the timing of pressing the material W, and when the signal block 61 approaches below the detection part 62c,
From this proximity switch 62 to the air cylinder 51
An operation signal is output to the air cylinder 51 to cause the air cylinder 51 to perform a pushing operation. Further, if a deviation occurs between the operating timing of the air cylinder 5 and the timing at which the phases of the threads of the pair of round dies 26 and 26 match during thread rolling, the operating cover 66 By slightly rotating and moving the installation location of the proximity switch 62,
The operating timing of the air cylinder 51 can be easily adjusted.

Also, the through hole 2b formed in the bed 2a
The cylindrical member 63 has an elliptical shape along the vertical direction in FIG. By constantly pressing downward in FIG. 1, the first and second signal sprockets 5
This is to prevent the chain 58, which is stretched between 7 and 59, from loosening.

Further, the differential speed rolling machine 1 has the bed 2
A straight feeder 70 is provided on a. This linear feeder 70 is operated by a motor 7 as shown in FIG.
1 and a mount block 74 to which tracks 72 and 73 are fixed. By vibrating the material W on the tracks 72 and 73, the material W is moved in the direction of the guide springs 55 and 55. In this case, the proximal end 72a of the track (the track on the left in FIG. 1) 72 is connected via a chute to a machine tool (not shown) such as a machining machine that performs a pre-process of thread cutting.

1 is a material holding arm, and while the air cylinder 51 is not operating, the material W is held by the guide springs 55, 5.
5.

As explained above, in this embodiment, the signal block 61 provided on the sprocket shaft 60
The timing when the phases of the threads of the pair of round dies 26 and 26 match is detected by the proximity switch 62 and the close proximity switch 62, but this is not limited to this, and other configurations may be used. For example, a cam-shaped signal block is attached to the sprocket shaft 60, and a micro switch for controlling the material pushing timing that can come into contact with the cam is provided, and when these contact, the pair of round dies 2
It is also possible to detect the timing when the phases of the 6 and 26 screw threads match.

[Effect of the invention] As explained above, according to this invention,
In a differential speed rolling machine equipped with a pair of round dies that rotate at different speeds and in the same direction, and a material feeding mechanism that feeds the material between the pair of round dies, the pair of round dies are While being arranged horizontally, the material feeding mechanism forcibly pushes the material between the pair of round dies in the same plane as the pair of round dies and from a direction perpendicular to the arrangement direction of the pair of round dies. an actuator, a signal block that rotates once in a period in which the phases of the screw threads formed on the pair of round dies match in conjunction with the pair of round dies; and a signal block that is rotatable in accordance with the rotation path of the signal block. The structure includes a material pushing timing control switch which detects the timing when the phases of the pair of round dies coincide with each other due to the approach of the signal block and outputs an operation signal to the actuator. Maintenance and management of the feeding mechanism becomes extremely easy, and
This prevents a lag between the timing when the threads of the pair of round dies match and the timing when the material is pushed between the pair of round dies, or the material is thrown off, resulting in defective products. In addition to being able to prevent this problem, it is also possible to finely adjust the timing of pushing the material, so it can bring about the very excellent effect of always being able to obtain highly accurate screws.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a differential speed rolling machine according to an embodiment of this invention, Fig. 2 is a schematic explanatory diagram of the arrangement inside the drive section of the differential speed rolling machine of Fig. 1, and Fig. 3 is a plan view showing a differential speed rolling machine according to an embodiment of the invention. A sectional view taken along the line A-A in FIG. 1, and FIGS. 4 and 5 are views showing the left side of the rolling part of the differential speed rolling machine in FIG. A sectional view and an explanatory view taken from the direction of arrow B in FIG. 4, and FIGS. 6 and 7 are a fragmented sectional view and a top view, respectively, showing the material feeding mechanism of a conventional differential speed rolling machine, as seen from the front direction. It is a fractured sectional view seen from the direction. 1... Differential speed rolling machine, 26, 26... A pair of round dies, 51... Air cylinder (actuator), 61... Signal block, 62... Proximity switch (switch for controlling the material pushing timing).

Claims (1)

[Scope of utility model registration request] In a differential speed rolling machine equipped with a pair of round dies that rotate at different speeds and in the same direction, and a material feeding mechanism that feeds the material between the pair of round dies, the pair of round dies are While being arranged horizontally, the material feeding mechanism forcibly pushes the material between the pair of round dies in the same plane as the pair of round dies and from a direction perpendicular to the arrangement direction of the pair of round dies. an actuator, a signal block that rotates once in a period in which the phases of the screw threads formed on the pair of round dies match in conjunction with the pair of round dies; and a signal block that is rotatable in accordance with the rotation path of the signal block. It is characterized by comprising a switch for material pushing timing control, which is installed in the actuator and detects the timing when the phases of the pair of round dies coincide with each other due to the approach of the signal block, and outputs an operation signal to the actuator. Differential speed rolling machine.