JP2514022Y2 - Displacement adjustment device for hydraulic cylinder in metal edge processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a metal used for rolling a precision-grade screw or a parallel screw on the outer peripheral surface of the end of a metal tube or a metal round bar, for example. A metal material that is attached to a material end processing machine and adjusts the displacement amount of the hydraulic cylinder body to rotate the rolling processing die according to the diameter of the end of the metal material to be rolled. The present invention relates to a displacement amount adjusting device for a hydraulic cylinder in an end processing machine (hereinafter, simply referred to as a displacement amount adjusting device in this specification).

(Prior Art) For example, a parallel screw is formed at an end portion of a metal pipe incorporated in a link mechanism or the like which constitutes a suspension of an automobile, in order to screw a nut for connecting the metal pipe and another member. There is a need.

As a processing machine for metal end parts used in such cases,
Those shown in FIGS. 2 to 3 have been proposed by the present inventors. The rolling machine shown in FIGS. 2 to 3 will be described below.

In FIG. 2, reference numerals 1 and 2 denote rocking pieces whose one ends are pivotally supported by three pivots 2 and 2, respectively, which are provided in a fixed portion, and inner ends of the rocking pieces 1 and 1 respectively. Shafts 3 and 3 are provided on the portion, and rolling dies 4 and 4 are pivotally supported on the shafts 3 and 3.

Inside the guide wall 6 formed on the front surface of the housing 5 of the metal material end processing machine, a rotating ring 7 is provided around the pivots 2 and 2 as the main body 11 of the hydraulic cylinder 10 described later is displaced. It is rotatably installed.

Guide pieces 8, 8 are provided on the front surface of the rotating ring 7, and these guide pieces 8, 8 are used for the swing pieces 1, 1 respectively.
Are engaged with the guide grooves 9 provided on the.

As shown in FIG. 3, a hydraulic cylinder 10 for rotating the rotary ring 7 is provided inside the housing 5. The lower end of the rod 12 of the hydraulic cylinder 10 is attached to the housing 5
Inserted into the hole provided on the bottom of the, the upper end of the rod 12
A through hole formed in the upper surface of the housing 5 is inserted, and a cap nut 13 is screwed to an end portion having a male screw portion that protrudes from the upper surface of the housing 5. A piston 29 fixed to the intermediate portion of the rod 12 is oil-tightly fitted inside the main body 11. Therefore, when pressure oil is supplied to and discharged from the main body 11 of the hydraulic cylinder 10, the main body 11 of the hydraulic cylinder 10 is displaced in the vertical direction in FIG.

Furthermore, on the outer peripheral surface of the intermediate portion of the main body 11 of the hydraulic cylinder 10,
The protruding pin 14 which is an engaging member is fixedly provided. The projecting pin 14 is projected from the front surface of the housing 5 through a through hole 30 formed in the front surface of the housing 5 and extending in the vertical direction, and is locked in a through hole 15 formed in the rotating ring 7 and extending in the left and right direction. The rotary ring 7 is rotated in accordance with the displacement of the main body 11 of the hydraulic cylinder 10.

When a screw or the like is formed at the tip of a metal material such as a metal pipe by the metal material edge processing machine configured as described above, the tip of the metal material is placed inside the plurality of rolling dies 4, 4. Then, by supplying pressure oil to the main body 11 of the hydraulic cylinder 10, the main body 11 of the hydraulic cylinder 10 is displaced upward in FIG.

As a result, the rotary ring 7 engaged with the projecting pin 14 fixedly provided on the outer peripheral surface of the intermediate portion of the main body 11 is rotated clockwise in FIG. 2, and further, the swinging pieces 1, about the pivots 2, 2. Along with the rocking of 1 the rolling dies 4, 4 pivotally supported by the rocking pieces 1, 1 rotate to press the outer peripheral surface of the end portion of the metal material.

As a result, a screw or the like is formed on the outer peripheral surface of the end portion of the metal material by rolling.

By the way, with the processing machine for metal material end parts as described above,
Since there are various diameters of metal materials that are plastically processed such as screws on the outer peripheral surfaces of the ends, the amount of rotation of the rolling dies 4 and 4 depends on the diameter of these metal materials. Must be changed.

The amount of rotation of the rolling dies 4 and 4 is determined by the rotation ring 7
The amount of displacement of the main body 11 of the hydraulic cylinder 10 must be adjustable because it changes with the amount of rotation of the main body 11 of the hydraulic cylinder 10.

For this reason, in the above-described metal material end processing machine, a displacement amount adjusting device as shown in FIG. 3 is provided.

That is, the lower end portion of the bar member 16 having the male screw portion 17 formed in the upper half portion is inserted into the hole provided in the bottom plate of the housing 5, and
The upper end of the rod is inserted into a through hole 18 formed in the upper plate of the housing 5 via a slide bearing, and a knob 19 is provided at the end of the rod 16 protruding from the housing 5.

Further, a guide rod 20 is provided in parallel with the rod 16 at a position near the rod 16 and away from the hydraulic cylinder 10. Then, the rod 16 is screwed into the female screw portion 22 of the nut member 21, and the guide rod 20 is inserted into the through hole 23, whereby the knob
When the bar member 16 is rotated by rotating 19 and the nut member 21,
Is designed to go up and down. In addition, a concave hole is provided at the lower end of the bar member 16, and a compression spring is fitted in the concave hole to give upward elasticity to the bar member 16 to prevent the bar member 16 from rattling.

Further, the nut member 21 is provided with a proximity switch 25 via the arm 24, and the upper end of the main body 11 of the hydraulic cylinder 10 is
When this proximity switch 25 is approached to a predetermined proximity, this is detected, and a controller (not shown) controls the supply and discharge of pressure oil to stop the main body 11.

With the displacement amount adjusting device configured as described above, the body of the hydraulic cylinder 10 is adjusted so as to adjust the amount of rotation of the rolling dies 4, 4 according to the diameter of the end of the metal material to be rolled.
To adjust the displacement of 11, perform as follows.

That is, by rotating the knob 19, the nut member 21 is moved up and down to a desired position. As the nut member 21 moves up and down, the proximity switch 25 provided on the nut member 21 via the arm 24 is positioned at a desired height. Since the relationship between the turning amount of the rolling dies 4 and 4 and the displacement amount of the main body 11 of the hydraulic cylinder 10 is displayed in the vicinity of the knob 19, the knob 19 is rotated by an appropriate amount while watching this display. Then, the nut member 21 is moved up and down so that the proximity switch 25 is located at a desired height.

When the above work is completed, the end of the metal material is inserted between the rolling dies 4 and 4, and the pressure oil is supplied to the hydraulic cylinder 10 to displace the main body 11 of the hydraulic cylinder 10 to rotate it. The rolling dies 4 and 4 are rotated through the ring 7 to roll a screw or the like on the end portion of the metal material, but if the main body 11 reaches a predetermined position due to the presence of the proximity switch 25. Since the controller controls the supply and discharge of the pressure oil to stop the displacement of the main body 11, the rolling dies 4 and 4 are rotated by a desired amount according to the diameter of the end of the metal material. .

(Problems to be solved by the invention) However, in the displacement amount adjusting device as described above, the following inconvenience occurs.

That is, when the proximity switch 25 detects that the body 11 of the hydraulic cylinder 10 reaches a predetermined height, the proximity switch 25
The controller controls the supply and discharge of the pressure oil by the signal from and stops the displacement of the main body 11, but at this time, the main body 11 of the hydraulic cylinder 10 does not immediately stop due to its own inertial force. Moreover, the amount of movement due to the inertial force slightly changes due to the viscosity of the oil that changes with temperature changes, etc., so the stop position of the main body 11 inevitably changes from time to time.
In this way, since the stop position of the main body 11 of the hydraulic cylinder 10 varies, the amount of rotation of the rolling dies 4, 4 also varies,
It is not preferable when forming a parallel screw or a precision screw that requires high accuracy.

The displacement amount adjusting device of the present invention is designed to solve the above-mentioned inconvenience.

(Means for Solving the Problem) A displacement amount adjusting device of the present invention is formed on a plurality of rolling dies and a plurality of rolling dies pivotally supported by shafts provided on a plurality of swinging pieces. A plurality of guide pieces that engage with the guide grooves are supported, and a rotating ring provided on the front surface of the housing and an engaging member that engages with the rotating ring are fixed to the main body in order to rotate the rotating ring. The main body of the hydraulic cylinder is attached to a metal material end processing machine composed of a hydraulic cylinder that is displaceable with the supply and discharge of pressure oil, and adjusts the amount of rotation of the rolling die. The amount of displacement is adjusted.

In order to adjust the displacement amount of the main body of the hydraulic cylinder, a displacement amount adjusting device of the present invention is provided with a rod member having a male screw portion, a nut member screwed to the male screw portion, and parallel to the rod member. , A guide rod that disables rotation of the nut member by inserting it into a through hole formed in the nut member, a proximity switch provided on the nut member, and displacement of the body of the hydraulic cylinder by a signal from the proximity switch. And a stopper protruding from the nut member to a position facing one end surface of the main body of the hydraulic cylinder.

(Operation) The displacement amount adjusting device according to the present invention configured as described above operates as follows.

That is, when adjusting the displacement amount of the main body of the hydraulic cylinder, first, the rod member is rotated to move the nut member up and down, and the proximity switch provided on the nut member is positioned at a desired height.

After the adjustment of the displacement amount of the body of the hydraulic cylinder due to the lifting and lowering of the nut member is completed, next, in order to perform plastic working on the outer peripheral surface of the metal material end, the hydraulic cylinder is rotated to rotate the rolling die. Pressure oil is introduced into the main body to displace the main body of this hydraulic cylinder, but if the main body comes close to the proximity switch to a predetermined proximity, the proximity switch detects this,
A controller stops the body.

Further, in the case of the displacement adjusting device of the present invention, even if the body tries to be displaced beyond the stop position due to the inertial force of the body of the hydraulic cylinder, the stopper comes into contact with the end surface of the body, and the displacement further occurs. Prevent.

Therefore, the main body of the hydraulic cylinder always stops at the desired position.

(Embodiment) The present invention will be described in more detail with reference to the illustrated embodiment.

FIG. 1 shows an essential part of an embodiment of the present invention, which is A- in FIG.
It is a figure corresponding to the A section.

The configuration and operation of the metal material end processing machine provided with the displacement amount adjusting device of the present invention are the same as those of the conventional example described above, and are not the gist of the present invention, so the description thereof will be omitted. ,
The features of the present invention will be described below.

Also in the displacement amount adjusting device of the present invention, the rod 16 and the guide rod 20 are provided in the housing 5 as in the above-mentioned conventional example, and the rod 16 is provided with the female screw portion 22 provided in the nut member 26. The guide rod 20 is inserted into the through hole 23 while being screwed into. Then, by rotating the knob 19 provided on the upper end portion of the rod member 16, the rod member 16 is rotated, and the nut member 26 can be moved up and down along the rod member 16.

The end surface of the nut member 26 on the hydraulic cylinder 10 side is projected so as to face the upper end of the main body 11 of the hydraulic cylinder 10, and a stopper plate 27 is provided on the lower surface of this projection to form a stopper 28.

Further, a proximity switch 25 is provided on the side surface of the stopper 28, and when the upper end of the main body 11 comes close to the proximity switch 25 by a predetermined distance, the upper end surface of the main body 11 collides with the stopper plate 27. At the same time, based on the signal from the proximity switch 25, a controller (not shown) controls the supply and discharge of pressure oil to stop the main body 11.

In the displacement amount adjusting device of the present invention configured as described above, the operation of setting the height position of the proximity switch 25 and stopping the displacement of the main body 11 of the hydraulic cylinder 10 by the proximity switch 25 have been described above. It is almost the same as the conventional displacement amount adjusting device.

However, in the displacement adjusting device of the present invention, even if the main body 11 of the hydraulic cylinder 10 tries to further rise beyond the desired stop position due to the influence of inertial force, the main body 11
The upper end surface of the abutment abuts the stopper 28 existing at the desired stop position and cannot be further raised.

Therefore, the main body 11 of the hydraulic cylinder 10 always stops at the desired position regardless of the change in the viscosity of the pressure oil.

As a result, as the body 11 is displaced, the rotating ring 7
The amount of rotation of the rolling dies 4 and 4 that rotate via such members as described above is always as desired, and it becomes possible to perform accurate plastic working on the end of the metal material.

(Advantage of the Invention) Since the displacement amount adjusting device of the present invention is constructed and operates as described above, it is possible to always stop the hydraulic cylinder body at a desired position, and it is possible to obtain high accuracy like a parallel screw or a precision screw. It is possible to easily perform the plastic working required.

[Brief description of drawings]

FIG. 1 shows an essential part of an embodiment of the present invention, which is AA of FIG.
A view corresponding to a cross section, FIG. 2 is a front view of a metal material end processing machine provided with a displacement amount adjusting device of the present invention, and FIG. 3 shows a conventional displacement amount adjusting device, similar to FIG. FIG. 1: swinging piece, 2: pivot, 3: axis, 4: rolling die, 5: housing, 6: guide wall, 7: rotating ring, 8: guide piece, 9: guide groove, 10: hydraulic cylinder, 11: body, 12: rod, 13: cap nut, 14: protruding pin, 15: through hole, 16: bar material, 17: male screw part,
18: through hole, 19: pick, 20: guide rod, 21: nut member, 22: female screw part, 23: through hole, 24: arm, 25: proximity switch, 26: nut member, 27: stopper plate, 28 : Stopper, 29: Piston, 30: Through hole.

Claims (1)

(57) [Scope of utility model registration request] 1. A housing for supporting a plurality of rolling dies pivotally supported on shafts provided on a plurality of rocking pieces and a plurality of guide pieces engaging with guide grooves formed on each rocking piece. A rotary ring provided on the front surface of the main body, and an engaging member that engages with the rotary ring is fixed to the main body to rotate the rotary ring, and the main body can be displaced as the pressure oil is supplied and discharged. A metal material end processing machine which is attached to a metal material end processing machine including a hydraulic cylinder and which adjusts the displacement of the body of the hydraulic cylinder in order to adjust the rotation amount of the rolling die. A displacement adjusting device for a hydraulic cylinder, comprising a rod member having a male screw portion, a nut member screwed to the male screw portion, a through hole formed in the nut member in parallel with the rod member. A guide rod that disables rotation of this nut member by inserting it,
A proximity switch provided on the nut member, a controller for stopping the displacement of the main body of the hydraulic cylinder by a signal from the proximity switch, and the nut member protruding to a position facing one end surface of the main body of the hydraulic cylinder. Displacement adjusting device for a hydraulic cylinder in a metal material end processing machine, which comprises a stopper.