JPH0212651B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a fixing device for easily attaching, detaching, and replacing an anvil tip (guide bar) of a round bar straightening machine for straightening and polishing bent pipes, round bars, etc. It is something.

[Conventional technology]

Conventionally, this type of round bar straightening machine passes the material to be straightened between a pair of upper and lower straightening rolls whose roll axes are inclined at a predetermined angle with respect to the course of the material to be straightened and intersect with each other. As shown in Fig. 6, anvil chips (guide bars) a and anvil support plates b are installed on the left and right between the upper and lower straightening rolls to prevent the material to be straightened from flying out.
It is attached to the top with a plurality of bolts c, and is rotated to simultaneously remove black scale and polish the surface of the material to be straightened.

[Problem that the invention seeks to solve]

In the above-mentioned round bar straightening machine, the anvil chips (guide bars) placed on the left and right between the upper and lower straightening rolls were each attached with multiple bolts. Bolts need to be tightened and removed, and the anvil tip usually wears out in about 30 minutes and needs to be replaced, so installation and removal, including the narrow left and right arrangement between crossed straightening rolls, is troublesome.
There were problems in that the work was cumbersome and the replacement work took a considerable amount of time. Also, there was no suitable device for easily and quickly attaching and detaching the anvil tip.

The present invention has been devised in view of the above circumstances.

[Means for solving problems]

Means for solving the above problems will be explained below using FIGS. 1 to 5, which correspond to embodiments.

The material to be straightened is passed between the upper and lower straightening rolls 2 and 3 whose roll crossing angle and rolling reduction can be freely adjusted, and the movement is adjusted to the left and right between the upper and lower straightening rolls 2 and 3, respectively, to move up and down and toward the path of the material to be straightened. A support plate 4 is provided for an anvil tip 17 that can be freely arranged, and a restraining rod 8 is provided on one side of each support plate 4 so as to be rotatable about a pin 5, and a hydraulic cylinder 10 fixed on the support plate 4 is provided. By supplying pressure oil into the inside thereof, one end of the restraining rod 8 is pushed up and rotated against the return spring 12, and the anvil chip (guide bar) 17 placed on the front step edge of the support plate 4 is pressed and fixed at the other end. Tightening fitting 16 equipped with piston 13
and a hydraulic cylinder 19 on the lower surface of the other side of the support plate 4.
The piston 20 connected to the support plate 4 and the upper part of the shaft rod 23 attached to the center of the cylinder are screwed to the upper ends of the piston 20 through the support plate 4 and the notch 18 of the anvil chip 17, and a hydraulic cylinder is created by supplying pressure oil. 19. An anvil clamp device characterized in that the anvil chip 17 is clamped by being equipped with a clamping fitting 25 for crimping and fixing the anvil chip 17 on the support plate 4 by pressing down the shaft rod 23 and the nut 24.

[Effect]

In the present invention, with the above configuration, when the pressure oil passage of the hydraulic cylinder 10 of the one side fastening fitting 16 is opened, the return spring 1
The piston 13 is moved downward by the force of 2, the restraining rod 8 is rotated by the spring 7 about the pin 5, the tip restraining part 8a is separated from the anvil tip 17, the restraining is released, and the clamping member on the other side is When the pressure oil passage of the hydraulic cylinder 19 of 25 is opened, the hydraulic cylinder 19, the shaft rod 23, and the nut 24 are moved upward by the force of the return spring 21, and the pressure on the anvil chip 17 is released. It can be immediately and easily removed from the anvil support plate 4 through the anvil support plate 4.

Thus, when reinstalling a new anvil chip 17, the notch 18 of the anvil chip 17 is fitted into the shaft rod 23 attached to the center of the hydraulic cylinder 19, and the anvil chip 17 is fitted onto the support plate 4.
When pressure oil is fed into the hydraulic cylinder 10, the piston 13 and shaft rod head 14 push up one end of the restraining rod 8 against the return spring 12, and the rod rotates to push the anvil tip 17 onto the support plate 4 with its tip. When it is pressed and fixed, and pressure oil is sent to the hydraulic cylinder 19 on the other side, the piston 20 does not move, but instead the hydraulic cylinder 19, shaft rod 23, and nut 24 move downward, instantly moving the anvil chip 17 onto the support plate 4. It can be fixed by pressing.

Then, the anvil chips 17, 17 arranged on the left and right sides between the straightening rolls 2, 3 remove black scales from the surface of the material to be straightened as it rotates and progresses between the straightening rolls 2, 3, and polish the surface to make it beautiful. A perfect finish can be obtained.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes the main body of the round bar straightening machine, 2 and 3 upper and lower straightening rolls, and 4 anvil chips disposed on the left and right sides between the upper and lower straightening rolls 2 and 3, respectively. With 17 support plates,
Anvil tip (guide bar) on the front step edge
17 is placed in a polymerized manner. A bearing plate 6 is provided on one side of the upper surface of the support plate 4, and a restraining rod 8 having a hook portion 8b at the upper end and a restraining portion 8a at the tip is rotatably pivoted to this with the pin 5 as a fulcrum. 7 applies a force to rotate the restraining portion 8a in an upward direction away from the upper surface of the anvil chip 17.

Reference numeral 16 denotes a fastening fitting provided on one side of the support plate 4 directly below the hook portion 8b of the restraining rod 8, and includes a hydraulic cylinder 10 fixed to the support plate 4, a pressure oil passage 11 inside thereof, and a pressure oil passage. A piston 13 that rises against a return spring 12 due to feeding, and a hydraulic cylinder 10
The shaft rod 14 is fitted into the center of the piston 13 and has a head mounted on the upper end of the piston 13.

Due to the upward movement of the piston 13, the shaft head 14
The hook portion 8b at one end of the restraining rod 8 is pushed up and rotated through the holding rod 8, and the anvil tip 17 on the support plate 4 is pressed by the restraining portion 8a at the tip.

Reference numeral 25 denotes a tightening fitting installed on the lower surface of the other side of the support plate 4, and includes a hydraulic cylinder 19 and a pressure oil passage 2 inside it.
2 and a piston 20 whose upper end is appropriately fixed to the support plate 4.
and a headed shaft rod 23 fitted into the center of the hydraulic cylinder 19 from below. It is configured to suppress 17.

When pressure oil is sent to the tightening fitting 16 from the hydraulic joint 15, the piston 13 and the shaft head 14 rise and push up the hook 8b at one end of the restraining rod 8, so that the restraining rod 8 is rotated around the pin 5, and its The anvil chip 17 is pressed and fixed on the support plate 4 by the holding part 8a at the tip, and when the clamping fitting 25 sends pressure oil from the hydraulic joint 26, the piston 20 is connected to the lower surface of the support plate 4, so the hydraulic cylinder 19 and shaft 2
3 is pulled down, and the anvil chip 17 is crimped and fixed on the support plate 4 with the nut 24 at the upper end of the shaft, so that the anvil chip 17 can be immediately attached and fixed.

When the hydraulic circuits of these fastening fittings 16 and 25 are opened, the piston 13 on one side moves downward by the force of the return spring 12, and the restraining rod 8 is moved by the spring 7 into the pin 5.
The pressure on the anvil tip 17 is released by rotating around the center, and the other side is released from the hydraulic cylinder 1 by the force of the return spring 21.
9. Since the shaft rod 23 and the nut 24 move upward and the pressure exerted by the nut 24 on the anvil chip 17 is released, the anvil chip 17 can be easily attached/detached and replaced.

Reference numeral 27 denotes a side frame provided over the stay shafts 28, 28 on both the front and rear sides of the round bar straightening machine main body 1, and the support plate 4 is attached to this side frame 27.
Hydraulic motor 2 for raising and lowering the anvil and holding the anvil so that it can be adjusted up and down and moved forward and backward toward the path of the material to be straightened.
A vertical adjustment device 30 by means of 9 and a forward/backward adjustment device 32 by rotation of a handle 31 are installed to set the position of the anvil tip 17 relative to the material to be straightened.

[Effects of the Invention] Since the present invention has the above-described configuration, the anvil chips installed on the left and right sides between the straightening rolls in a round bar straightening machine can be hydraulically operated by tightening fittings installed on both sides of the support plate of the anvil chip. can be quickly and easily installed and removed by
Moreover, since the anvil tip is always clamped and crimped onto the support plate and fixed by hydraulic pressure, it is possible to suppress vibration and return (loosening) when straightening the round bar.
Also, the anvil tip (guide bar) is frequently replaced due to wear caused by removal of black scales from the material to be straightened and polishing.
The replacement work can be simplified and speeded up, and the troublesome work of tightening and removing a large number of mounting bolts, which is conventional, can be eliminated by a simple structure. Moreover, this fixing device can be installed in a narrow space of the cross-arranged straightening rolls without getting in the way.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional plan view of a round bar straightening machine equipped with the device of the present invention, FIG. 2 is a front view of FIG. Fig. 4 is a sectional view showing the anvil tip fixing device on the other side, Fig. 5 is a relationship diagram between the anvil tip fixing device of the present invention and an anvil support device that can be adjusted vertically and horizontally, and Fig. 6 is a conventional anvil tip fixing method. A plan view showing. 1 is the straightening machine body, 2 is the upper straightening roll, 3 is the lower straightening roll, 4 is the support plate, 5 is the pin, 6 is the receiver,
7 is a spring, 8 is a restraining rod, 8a is a hook, 8b
1 is a tip holding part, 10 is a hydraulic cylinder, 12 is a return spring, 13 is a piston, 14 is a shaft rod, 16 is a tightening fitting, 17 is an anvil tip, 18 is a notch, 1
9 is a hydraulic cylinder, 20 is a piston, 21 is a return spring, 23 is a shaft rod, 24 is a nut, and 25 is a tightening fitting.

Claims (1)

[Claims] 1 A restraining rod is provided on one side of the support plate of the anvil chip, which is disposed on the left and right between the upper and lower straightening rolls through which the material to be straightened passes, and is rotatable around a pin, and a hydraulic pressure fixed on the support plate is installed. A cylinder and a piston that pushes up and rotates a restraining rod against a return spring by supplying pressure oil into the cylinder, and presses and fixes an anvil chip (guide bar) placed on the front stage edge of a support plate with its tip. A hydraulic cylinder is attached to the lower surface of the other side of the support plate, a piston is connected to the support plate, and the upper part of the shaft rod attached to the center of the cylinder is attached to the upper end of the support plate through the notch of the anvil chip. The hydraulic pressure in a round bar straightening machine is characterized in that the anvil chip is clamped by fixing the anvil chip, and is equipped with a shaft rod by supplying pressure oil, and a tightening fitting that crimps and fixes the anvil chip on the support plate by compressing the nut. Type anvil clamp device.