JPS63168229A - Bending device for tube material - Google Patents

Abstract

PURPOSE:To prevent the deformation of a tube material at the bending time and to improve the workability as well by performing a bending by feeding a tube material to a pressing mechanism with inserting a mandrel, then winding it in a specific pitch diameter. CONSTITUTION:A work is started by inserting the mandrel M fitted to a mandrel supporting rod to the stipulated position of a tube material T. The tube material T is press-fitted by a pair of pressing rubber rollers 31a, 31b provided on a bending device 10 and the rubber rollers 21a, 21b for driving. A coil like tube material T1 is then made by bending the tube material T by ascending a coil forming roller 52 and driving a driving clamp roller 41. With the device of this composition the product of excellent quality can be manufactured with good efficiency.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tube bending device, and more specifically to a tube that can bend hollow pipe material into a coil shape without deforming it. This invention relates to a material bending device.

[Prior art]

Conventionally, pipes (tube materials) for transporting fuel and heat exchange pipes used for heat exchange have been bent into coil shapes due to installation space issues and thermal efficiency.

By the way, in the conventional device for bending a tube material as described above, a straight tube material is placed on a guide device, and the tip side of the tube material is held by the guide device while a drive device is used to bend the tube material into a coil diameter shaping device. Coil tube material with a fixed pitch was manufactured by feeding the material.

However, in the case of such conventional devices, when the tube material is clamped and fed into the coil diameter shaping device, the tube material is held while being fed with a constant pressure, which causes the diameter of the tube material to change. In addition, since everything from feeding the material to bending was done manually, work efficiency was extremely poor, and setup changes due to changes in pitch diameter or coil diameter were difficult. The work was extremely difficult.

[Purpose of the invention]

This invention was devised by focusing on such conventional problems, and its purpose is to avoid deforming or crushing the tube material when bending the tube material, and to ensure accuracy at all times. In addition, since the tube extrusion means extrudes the tube with a constant pressure force, it is extremely easy to bend the tube, and it is also possible to change the pitch diameter or coil An object of the present invention is to provide a tube material bending device that can easily perform setup change work associated with a change in diameter.

[Structure of the invention]

In order to achieve the above object, the present invention has a bending device body provided on a frame on a pedestal, and a tube material inserted into a mandrel is fed to the bending device at a constant feed rate on one side of the frame. The bending device main body includes a tube material feeding mechanism provided on the frame, and a lifting mechanism that presses the tube material onto the feeding mechanism with a predetermined pressure. A small (
A material clamping mechanism, one of which is driven, a tube material coil diameter adjustment device, and a pinch adjustment device that adjusts the pitch of the tube material coil diameter. The device is equipped with extrusion means for feeding the tube material inserted through the mandrel into the bending device main body at a constant speed, so the mandrel is inserted when feeding or bending the tube material. The gist of this invention is to be able to automatically bend the tube material without deforming or crushing it and always maintaining a constant product accuracy.

[Embodiments of the invention]

The present invention will be described in detail below based on the accompanying drawings.

Figure 1 is a front view of a folding device embodying this invention;
The figure shows a side view thereof, and FIG. 3 shows a sectional view of the means for extruding the tube material W.

The bending device includes a bending device body 1.0 provided on a frame 2 on a pedestal 1, and a bending device body 1.0 provided on one side of the frame 2.
A tube material supply device 10 that supplies the tube material W inserted into the mandrel M to the bending device 10 at a constant feed rate.
It is composed of 0.

The bending device main body 10 includes a tube material feeding mechanism 20 provided on the frame 2, and a vertically movable pressing mechanism 30 that presses the tube material T with a predetermined pressure on the feeding mechanism 20. On the material extrusion side of the feeding mechanism 20 and the pressing mechanism 30, there is a material clamping mechanism 40, at least one of which is driven, and a coil diameter adjusting device 5 for the tube material T.
0, and a pitch adjusting means 60 for adjusting the pitch of the coil diameter of the tube material T.

Further, the tube material supplying device 100 includes extrusion means 110 for feeding out the mandrel M and the tube material T inserted through the mandrel M into the bending device main body 10 at a constant speed.

A tube material feeding mechanism 20 provided on the frame 2
Two rubber rollers 21a and 21b are arranged in parallel along the supply line XX of the tube material T, and this rubber roller 21a.

21b has a sprocket 2 on the shaft 22 as shown in FIG.
3 is provided. And on sprocket 23,
An operating handle 24 provided on the side of the pedestal 1 is connected to a sprocket 26 provided on a drive shaft 25 via a chain 27 .

Therefore, when the operating handle 24 is rotated in a certain direction,
Sprocket 26→chain 27→sprocket 23 to rubber roller 21a.

21b is rotationally driven in a fixed direction.

Furthermore, pressing rubber rollers 31a and 31b constituting a pressing mechanism 30 are disposed on the rubber rollers 21a and 21b, and these pressing rubber rollers 31a and 31b are rotated by a guide plate 33 that moves up and down along a guide rail 32. Possibly supported. The guide plate 33 is connected to a rod 35 of a cylinder 34 installed on the frame 2, and the pressing rubber roller 312 is connected to the rod 35 of a cylinder 34 installed on the frame 2.
, 31b on the rubber rollers 21a, 21b to press the rubber rollers 31a, 31t) and the rubber roller 21.
A and 21b sandwich and hold the tube material T into which the mandrel M is inserted.

In addition, 36 is a guide roller provided along the supply line XX of the tube material T.

Next, a material clamping mechanism 40 provided on the supply line XX on the material extrusion side between the feeding mechanism 20 and the pressing mechanism 30
A drive clamp roller 41 is disposed parallel to the rubber rollers 21a and 21b, and a clamp roller 42 is disposed above the drive clamp roller 41.

The drive clamp roller 41 is provided with a guide groove 41a for guiding the tube material T, and has a guide groove 41a for guiding the tube material T, and the drive clamp roller 41 has a guide groove 41a for guiding the tube material T.
Similarly to b, a sprocket (not shown) provided on the shaft 43 connects the sprocket 26 provided on the drive shaft 25 of the operating handle 24 provided on the side of the pedestal 1 and the chain 2.
7, and by rotating the operating handle 24, it is driven in a fixed direction in synchronization with the rubber rollers 21a and 21b.

Further, the clamp roller 42 is rotatably supported by a cylinder 44 installed on the frame 2.
The clamp roller 4I is moved up and down by the operation of the clamp roller 4I.

Next, the device 50 for adjusting the coil diameter of the tube material T is provided with a lifting cylinder 51 in the opposite direction installed at the bottom of the pedestal 1, and a coil forming roller 52 having a guide groove 52a at the tip of the lifting cylinder 51 up and down. A guide member 53 is attached so as to be movable in the direction.

The coil forming roller 52 can be raised and lowered along the guide member 53 by rotating a coil diameter adjustment ring 54 provided on the side of the lifting cylinder 51, and can be positioned according to the coil curvature. ing.

Moreover, 55 is a scale provided on the side of the guide member 53, and is used when positioning the front coil forming roller 52.

Further, the pitch adjusting means 60 for adjusting the pitch of the coil diameter of the tube material T includes the pressing rubber rollers 31a, 31
This pitch adjustment means 60 is provided on the frame 2 between the frame 2 and the clamp roller 42, and an adjustment guide 62 is attached to the tip of a guide shaft 61 provided on the frame 2 that can move forward and backward. A handle 63 for moving the guide shaft 61 forward and backward is provided at the end. Note that a dial gauge 64 for adjusting the pitch is provided in contact with the upper part of the guide shaft 61.

Next, in the tube material supply gel 100, an extrusion means 110 is attached to the frame 2 of the bending device main body 10 via a bracket bearing 101.

As shown in FIG. 3, this extrusion means 110 includes a tube feeder 112 having a piston 111 slidably mounted therein, which is slidably held on a bracket bearing 101, and inside the center of the tube feeder 112. On the side of the lock nut 113. A mandrel support rod 115 is inserted through a length adjustment nut 114.

As shown in FIG. 4, a screw 116 is formed at the tip of the mandrel support rod 115 to attach the mandrel M, and the rear end of the mandrel M is screwed into the screw 116.

Also, 117, 118, 119 are tube feeders 11
2 and an O-ring provided on the piston 111.

A locking portion 120 having a concave cross section for locking the rear end of the tube material T is formed on the side surface of the piston 111, and when the tube material T is inserted through the mandrel M, the rear end portion is attached to the locking portion 120. It is designed to come into contact with.

Next, a method for bending the tube material T will be explained with reference to FIG.

First, the mandrel support rod 115 attached to the tube feeder 112 with the lock nut 113 is attached by assembling the mandrel M to the screw 116, and then forming a straight tube material T from the tip of the mandrel M.
Insert it to the specified position.

Next, the cylinder 34 provided in the bending device main body IO is lowered under pressure, and a pair of pressing rubber rollers 31a, 31b attached in parallel to the guide plate 33 and a pair of driving rubber rollers 218, 21b are pressed. Crimp the tube material T with.

Next, the cylinder 44 of the coil diameter adjusting device 50 is lowered under pressure, and the clamp roller 42 is attached to the drive clamp roller 41.
Clamp the tip side of the tube material T through the .

Then, in order to position the coil forming roller 52 according to the coil curvature, the coil diameter adjustment ring 54 is rotated to align the indicator 55a with the scale 55.
The lifting cylinder 51 is pressurized and raised, and the tip of the tube material T is bent by the coil forming roller 52.

The pitch of the coil can be adjusted by rotating the handle 63.
The amount of movement of the pitch adjustment guide 62 is adjusted by a dial gauge 64.

Next, working pressure fluid (air) is introduced into the tube feeder 112 and pressurized, and the piston 111
Pressure feeds by contacting the terminal part of the Next, the operating handle 24
By rotating in the direction of the arrow, the rubber rollers 21a, 21b and the drive clamp roller 41 are rotationally driven via the sprocket 26 → chain 27 → sprocket 23 as described above, so the operating handle 24 is rotated according to the number of turns. Coiled tube material T by operation
1 is molded.

〔Effect of the invention〕

The present invention includes a bending device main body provided on a frame on a pedestal as described above, and a tube provided on one side of the frame for feeding a tube material inserted into a mandrel to the bending device at a constant feed rate. The bending device main body includes a tube material feeding mechanism provided on the frame, and a lifting mechanism that presses the tube material with a predetermined pressure on the feeding mechanism and is movable up and down. A material clamping mechanism, at least one of which is driven, a tube material coil diameter adjustment device, and a pitch adjustment means for adjusting the pitch of the tube material coil diameter are disposed on the material extrusion side of the feeding mechanism and the pressing mechanism. The tube material feeding device includes a mandrel and extrusion means for feeding the tube material inserted through the mandrel into the bending device main body at a constant speed, so that the tube material supply device When bending, the tube material will not be deformed or crushed, and products with high precision can be manufactured at all times.Also, the tube material is extruded with a constant pressing force by the tube material extrusion means. The bending operation is extremely easy, and furthermore, the pitch diameter and the changeover work associated with the change of the coil diameter can be easily performed.

In addition, since a rubber roller is used as the drive roller,
The tube material can be fed reliably without slipping, and the pressing force of the pressing mechanism and the material clamping mechanism can be freely changed, making it possible to release twisting during coil processing of the tube material. This method has the effect of making it possible to process a smooth coil, and furthermore, since the coil pitch can be measured and the number of turns per coil diameter can be adjusted during molding, there is no need to adjust the pitch after the molding process.

[Brief explanation of the drawing]

Figure 1 is a front view of a folding device embodying this invention;
3 is a sectional view of the means for extruding the tube material, FIG. 4 is an explanatory view of the mandrel rod, and FIG. 5 is a front view of the bending device showing the operating state of the present invention. DESCRIPTION OF SYMBOLS 1... Frame, 2... Frame, 10... Bending device main body, 20... Tube material feeding mechanism, 30...
Pressing mechanism, 40... Material clamping mechanism, 50... Coil diameter adjustment device, 60... Pinch adjustment means, 100.
...Tube material supply device, M...Mandrel, T...
・Tube material.

Claims (1)

[Claims] It consists of a bending device main body provided on a frame on a pedestal, and a tube material supply device provided on one side of the frame for feeding the tube material inserted into the mandrel to the bending device at a constant feed rate, The bending device main body includes a feeding mechanism for the tube material provided on the frame, and a pressing mechanism that can be raised and lowered to press the tube material with a predetermined pressure on the feeding mechanism. A material clamp mechanism, at least one of which is driven, a coil diameter adjustment device for the tube material, and a pitch adjustment means for adjusting the pitch of the coil diameter of the tube material are disposed on the material extrusion side of the tube, A tube material bending device, wherein the material supply device includes a mandrel and extrusion means for feeding the tube material inserted through the mandrel into the bending device main body at a constant speed.