JPS5925571Y2 - Pipe bending equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a bending device for pipe material equipped with a core bar, and in particular, a novel device that enables continuous plastic working by supplying the pipe material to the core bar from the rear of the core bar. This invention relates to a pipe bending device.

In general, a so-called dowel-type tube bending device is known as a device for plastically working a tube material, which performs bending by inserting a core metal into the tube material in order to prevent the tube material from collapsing during bending.

However, the conventional apparatus for the above-mentioned drawer set has various problems because it is configured so that the tube material is carried in (inserted) and carried out from the same direction.

That is, in the conventional device, as shown in FIG. 1, a core bar 2 is disposed facing a rotary table 1 for bending a pipe material p, and the rear end of a core bar 3 that holds this core bar 2 is adjusted in position. The pipe material P is fixed via a hydraulic cylinder 4 for use or directly fixed, and the pipe material P is carried into the core metal 2 and taken out after processing is completed from the front of the core metal 2, that is, from the direction of the rotary table 1. is configured to be performed.

For this reason, it is not possible to carry in and take out the pipe material p at the same time, which not only requires a lot of work time, but also the supply (carry-in) device (not shown) for the pipe material p is located near the rotary table 1 in front of the core metal 2. Therefore, space is a problem when installing the supply device in relation to the rotation space of the rotary table 1, which forces the device to be complicated and large, resulting in extremely poor workability.

In addition, in bending the tube material p, it is required that the difference between the inner diameter of the tube material p and the outer diameter of the core metal 2 be as small as possible.
Because the device is configured to be inserted directly into the body, the insertion process is extremely difficult, and in order to solve this problem, the device must be made more complex and highly accurate, which inevitably increases costs. .

This invention was devised to solve the various problems mentioned above all at once, and its purpose is not only to enable continuous plastic working of pipe materials, but also to shorten working time and improve workability. To provide a pipe material bending device with a simple configuration.

A preferred embodiment of the present invention will be described in detail below with reference to the drawings starting from FIG.

In FIG. 2, 10 is a tube bending unit I. equipped with a rotary table 11, and a core bar 12 is disposed facing the units 1 to 10.

This core metal 12 is integrally formed at the tip of a core metal rod 13 having a smaller diameter, and this core metal rod 13 is held in a fixed position by being clamped at its approximately center and rear portions by core metal rod clamps 14a and 14b, respectively. has been done.

In the core bar clamps 14a and 14b, the length is set to accommodate the pipe material p during the separation between the front clamp 14a and the rear clamp 14b.
..., and are configured to operate independently so that at least one of them is always in a pinched state.

On the other hand, at the rear of the core rod 13, a tube material supply means 16 is disposed for supplying the tube material p and inserting it into the rear part of the core rod 13.

This tube material supply means 16 includes a tube material take-out machine 16 a that takes out the tube materials p one by one from a pile of pipe materials p and supplies them onto the rear axis of the core metal rod 13 , and a tube material take-out machine 16 a that takes out the tube materials p one by one from a pile of tube materials p and supplies them onto the rear axis of the core metal rod 13 . extruder 16b consisting of a pneumatic cylinder that urges the tube material p supplied on the rear axis of the core bar 13 in the direction of the core bar 13 and inserts it into the core bar 13;
The tube material take-out machine 16a and the extruder 16b are configured to interlock to sequentially and intermittently supply and insert the tube material p into the rear part of the core bar 13.

A transfer means 17 is disposed below the core rod 13 to transfer the tube p inserted into the rear part of the core rod 13 by the tube supply means 16 to the core 12. It is composed of a feeder chuck 17a and a cart chuck 1b, which carry out a so-called length-taking motion of clamping and moving forward, releasing and retreating.

The feeder chuck 17a is the front clamp 14a
It is configured to reciprocate on a rail 18a laid along the core bar 13 between the rear clamp 14b and the rear clamp 14b by means of a drive means (not shown) such as a chain, and waits near the rear clamp 14b. When the tube material p is inserted into the rear part of the core rod 13, it is held and clamped by the front clamp 14a.
The structure is such that the receiver is transferred to the carriage chuck 17b.

The cart chuck 17b is configured to reciprocate by a hydraulic cylinder (not shown) on a rail 18a laid along the core bar 13 between the tube bending unit 10 and the front clamp 14a, and Clamp 14a
The tube material p is received from the feeder chuck 17a in the vicinity, and is transferred toward the tube material bending unit 10 in order to hold it and position it for bending.

Further, as a means for setting the feed amount of the cart chuck 17b, as shown in FIG. Mechanism 19 is used.

The fixed stopper 19b of this stopper mechanism 19 has a plurality of l-flange pieces 22 disposed in different steps on the outer periphery of a cylindrical shape 21 rotated by a driving machine 20 along the circumferential direction thereof, which abut against the movable stopper 19a. By rotating the cylindrical body 21 and selecting an arbitrary stopper piece 22, the feed origin of the cart chuck 17b can be arbitrarily set, and the feed amount of the pipe material p can be set. has been done.

On the other hand, in the core bar clamps 14a and 14b, the side clamp 14a and the rear clamp 14b are opened and closed in accordance with the movement of the tube material p being transferred along the core metal rod 13 by the transfer means 17, so that the tube material p is The core bar 13 is configured to be able to pass therethrough, and to operate in a manner that allows the core bar 13 to be held in a constant position at all times as described above.

It goes without saying that the core bar clamps 14a, 14b, the tube material supply means 16, and the transfer means 17 are controlled in operation by a control means so as to continuously supply the tube material p to the core metal 12.

The tube material bending unit 10 includes a rotary table 11 and a biasing tool 2 that urges the tube material p to prevent the tube material p from bending during molding.
As shown in FIG. 4, the rotary table 11 consists of a mold 24 in which an annular groove 24a with a semicircular cross section is formed in a cylinder and a pipe support part 24b, and a pipe support part of this mold 24. Pressing body 25 that presses and supports the tube material p on 24 b
It is equipped with

This pressing body 25 is provided so as to be freely protrusive and retractable in the direction of the tube support section 24b via a hydraulic cylinder 25a, and its tip is moved up and down along an inclined guide 24C formed at the lower part of the tube support section 24b when moving. A tube support arm 25b is pivotally connected to the tube support arm 25b.
b is configured to be lifted along the inclined guide 24C by moving in the direction of the tube material support section 24b, and collide with the tube material support section 24b to sandwich the tube material p.

Further, the rotary table 11 has a rotary shaft 26 on the central axis of the mold 24, and a rotation angle setting stopper 27 is attached to the rotary shaft 26 as shown in FIG.

This rotation angle setting stopper 27 includes an origin stopper piece 27a that abuts with an origin stopper 28, and a retractable stopper 29.
A replaceable mounting member having a stopper piece 27 b that abuts against the stopper piece 27 b that sets the rotation angle θ.
When b comes into contact with the stopper 29, the rotary table 11
is now stopped.

Therefore, if the rotation angle setting stoppers 27 having different rotation angles θ formed between the stop stopper 29 and the stop stopper piece 27 b are mounted on the rotary shaft 26 in multiple stages, the rotary table 11 can be used to bend the pipe material p. The corners and the number of bending stages can be set arbitrarily.

A similar mechanism as described above is provided in the cart chuck 17b, and the twist angle during plastic bending of the pipe p is set.

Next, the operation of the above embodiment will be described.

Now, the rear clamp 14b is in an open state, the core rod 13 is held only by the front clamp 14a, and the preceding pipe material p is held in the bogie chuck 17b and plastically worked by the pipe material bending unit) 10. In this case, the tube material p, which is first taken out from the tube material take-out machine 16a and pushed toward the core metal rod 13 by the extruder 16b, is inserted into the rear part of the core metal rod 13 through the open rear clamp 14b. .

When the tube material p is inserted into the rear part of the core bar 13, the feeder chuck 1 is placed in advance in the vicinity of the rear clamp 14b and is on standby.
7a is the front clamp 1 that holds the tip of the tube material p.
After transferring to 4a, open the pipe p and attach the rear clamp 1.
Return to 4b and wait.

At this time, the rear clamp 14b is closed to hold the core bar 13, and the front clamp 14a is switched to the open state.

As a result, the tube material p is carried between the front clamp 14a and the rear clamp 14b, and waits until the plastic working of the preceding tube material p is completed.

Next, the cart chuck 17b and the tube bending unit 10
When the plastic working of the preceding pipe material p is completed, the cart chuck 17b retreats to the vicinity of the front chuck 17a, and the feeder chuck 17a, which was in a standby state, moves forward while holding the rear part of the pipe material p. The truck chuck 1 is inserted through the front clamp 14a that opens the tube material p.
Pass the uke to 7b.

Next, the cart chuck 17b moves forward toward the tube bending unit 10 while holding and rotating the tube p, determines the twisting position and bending position of the tube p, and the tube bending unit 10 starts plastic working.

In this plastic working, as shown in FIG. 6, the feeding operation of the tube material p by the measuring movement of the cart chuck 17b with the feed amount set in advance, the twisting operation, the tube material bending unit 10 with the bending angle and number of bending stages set. rotary table 11
The bending process of the tube material p is performed at the same time, and thereby the plastic working of the tube material p is sequentially and continuously completed.

Next, when the predetermined number of bending steps by the interlocking action of the cart chuck 17b and the pipe bending unit 10 are completed and the rear end of the pipe p passes the front clamp 14a, the front clamp 14a closes and holds the core rod 13. Then, the rear clamp 14b switches to the open state.

During the above process, the tube material p taken out from the tube material take-out machine 16a is inserted into the rear part of the core bar 13 by the extruder 16b as described above, and the above-mentioned process is then repeated to continuously produce a large number of tube materials p one by one. plastically processed.

Therefore, since the pipe material p is carried into the core metal 12 from the core metal rod 13 behind the core metal 12, since the core metal rod 13 is generally thinner than the core metal 12, the work of carrying in or inserting the pipe material p can be performed very easily. Coupled with this, the loading and unloading operations of the pipe material p can be carried out at the same time, thereby improving work efficiency and shortening the working time.

In addition, in plastic working, the rotary table 11 in the tube bending unit 10 is configured to move the tube support arm 25b in and out as shown in FIG. Even if the tube material support arm 25b is separated from the tube material support part 24b, the tube material p can be sent out in the unloading direction without the tube material support arm 25b getting in the way. Unlike conventional equipment, in which the pipe material is fed back to its original position and then the pipe material is bent and positioned, the return of the rotary table 11 and the bending position of the pipe material by the feeding operation can be performed simultaneously, and the work time is reduced compared to the conventional device. It is much shorter than the device.

Furthermore, the cart chuck 17b is configured to include a stopper mechanism 19 as shown in FIG. 3, and the rotary table 11 is configured to include a rotation angle setting stopper 27 on the rotating shaft 26 as shown in FIG. Therefore, the stopping becomes extremely reliable, and the accuracy of the feed amount (feed dimension) of the tube material, the bending angle and the twisting angle of the tube material can be improved.

It should be noted that the present invention is not limited to the above-mentioned embodiment. For example, the transfer means 17 may be configured to include only the cart chuck 17b, and the tube material p may be transferred directly from the tube material supply means 16.
Of course, various implementations can be made without departing from the technical idea stated in the claims for utility model registration.

In summary, the present invention provides the following remarkable effects.

(1) Since the pipe material is supplied to the core metal from the rear of the core bar, it is possible to perform plastic working of the pipe material continuously, and the pipe material can be carried in and out at the same time, which greatly reduces the working time. In addition to being able to shorten the time,
Since the pipe materials are carried in and the processed pipe materials are carried out in one direction, space is not complicated and workability can be improved.

(2) Since the structure is simple, it can be manufactured easily and provided at low cost.

[Brief Description of the Drawings] Fig. 1 is a schematic configuration diagram of a conventional device, Fig. 2 is a schematic plan view of a tube bending device showing a preferred embodiment of the present invention, and Fig. 3 is a schematic plan view of a pipe bending device showing a preferred embodiment of the present invention.
The figure is a side view showing the stopper mechanism of the cart chuck, Figure 4 is a partially enlarged side view of the rotary table, Figure 5 is a schematic configuration diagram showing the rotation angle setting mechanism of the rotary table, and Figure 6 is pipe material bending. FIG. 3 is a partial plan view for explaining the movement of the unit and the cart chuck. In the figure, p is a tube material, 12 is a core bar, 13 is a core bar, 16 is a tube supply means, 17 is a tube material transfer means, and 14a and 14b are core bar clamps.

Claims (1)

[Scope of utility model registration request] In a pipe material bending device that includes a cored metal rod with a metal core formed at the tip thereof and that inserts a pipe material into the core metal and performs plastic processing, the pipe material is disposed behind the cored metal rod and supplies the tube material to the rear of the cored metal rod. a pipe material supplying means for inserting the pipe material, a pipe material transfer means for transporting the pipe material inserted by the supply means to the core metal along the core metal rod, and a pipe material transporting means for transporting the core metal rod according to the movement of the pipe material transferred by the transfer means. What is claimed is: 1. A bending device for a pipe material, comprising: a core bar clamp for holding the core metal bar constant, and configured to plastically work the pipe material while supplying the pipe material from the rear of the core metal rod to the core metal.