JP3354795B2 - Spindle mounting equipment for pipe bending equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mandrel mounting device for a pipe bending device, and more particularly to a pipe bending device in which a ball mandrel is pivotally mounted on a front end surface of the mandrel.

[0002]

2. Description of the Related Art A conventional pipe bending apparatus M of this kind
As shown in FIGS. 3 and 4, the main mandrel 60 is inserted into the pipe material P, and the clamp mandrel 70 is inserted from the opening at the tip of the pipe material P, so that the ball mandrel 64 is accommodated in the pipe material P. The space 90 and a portion 90 corresponding to the accommodating space for the clamp mandrel 70 are clamped by the bending means 20 by the clamping means 40 and the pipe material P is pressed against the bending mold 20 by the pressing means 30. At the same time, the pipe material P is bent by rotating the bending die 20.

[0003]

However, as described above, when the portion 90 of the pipe material P corresponding to the space for accommodating the ball mandrel 64 and the space for accommodating the clamp mandrel 70 is clamped by the clamp means 40, This clamp portion 90 of the material P becomes extremely long, and as a result, the clamp portion 90 of the pipe material P must be cut to an appropriate length as a post-process of bending the pipe material P. yield of P in bending a pipe material P together with laborious bending had a shake disadvantage no choice Ru seat if worse.

[0004] In particular, as post-processing of cutting the pipe material P, operations such as deburring, cleaning, and diameter correction are required. There was an inconvenience that it was difficult to significantly improve the work efficiency of the bending operation.

An object of the present invention is to eliminate such inconvenience.

[0006]

In order to achieve the above-mentioned object, in a main shaft mounting device for a pipe bending device according to the present invention, a bending die and a pressing device are provided on a frame, and the main shaft is mounted via a mounting holder. Attach a metal, and install a clamping means on the bending mold, insert the main mandrel into a pipe material, and insert a clamp mandrel into a tip end of the pipe material. and pressing the pipe on the bending tool by the pressing means with clamping the bending tool by the clamping means and the pipe bending apparatus for main mandrel bending the pipe while rotating the bending tool together with the clamping means Mounting
In the apparatus, the main mandrel is interposed compressed elastic means between the mounting holder and Shukokoro gold with are pivotally attached to the ball mandrel into the distal end surface, said Shukokorokin to said mounting holder Therefore, since it can be pushed in against the elasticity of the compression elastic means,

As shown in FIG. 1, when inserting a clamp mandrel into a tip end of a pipe material, a ball mandrel and, consequently, a main mandrel are pushed in the direction of the mounting holder against the elasticity of the compression elastic means. As a result, most of the space for accommodating the ball core in the pipe material can be arranged inside the bending start point of the pipe material (on the side of the mounting holder), so that the clamp portion of the pipe material can be shortened. .

[0008]

1 and 2, M is a pipe bending device, and 10 is its frame. 20 is a bending mold,
It is rotatably installed on the frame 10. The pipe member P is bent by winding a pipe member P described later around the peripheral surface of the bending mold 20. Reference numeral 30 denotes a pressing die (corresponding to the “pressing means” of the present invention), which is installed in the frame 10 near the bending die 20. Also, 40
Is a clamping means, which is installed on the bending die 20. The functions of the pressing die 30 and the clamp means 40 will be described later.

Reference numeral 50 denotes a mounting holder, which is installed on the frame 10. Reference numeral 51 denotes a fitting hole, which is formed in the mounting holder 50. Reference numeral 52 denotes a through hole, which is formed at the bottom of the insertion hole 51 with the same axis.

Reference numeral 60 denotes a mandrel whose base is inserted into the insertion hole 51 of the mounting holder 50 so as to be able to advance and retreat. The mandrel 60 is inserted into the pipe material P. Reference numeral 61 denotes a guide bolt.
Protruding from the rear end face. The guide bolt 61 passes through the through hole 52 of the mounting holder 50 so as to be able to advance and retreat. Reference numerals 611 and 611 denote a pair of nuts, which are screwed to the distal ends of the guide bolts 61. These nuts 6
Reference numerals 11 and 611 form a so-called double nut structure to prevent the guide bolt 61 from coming off.

Reference numeral 62 denotes a compression spring (corresponding to "compression elastic means" of the present invention), which is disposed between the bottom surface of the insertion hole 51 of the mounting holder 50 and the main shaft 60.
For this reason, the main shaft 60 is inserted into the insertion hole 5 against the compression spring 62.
Can be pushed into one. FIG. 1 shows a state in which the mandrel 60 is pushed into the fitting hole 51.

Reference numeral 63 denotes a cylinder portion, which is formed on the front surface of the mandrel 60. Reference numeral 64 denotes a ball mandrel, and a connecting pin 64 is provided at the open end of the cylinder portion 63.
1 for pivotal connection. The pipe material P is drawn out according to the ball mandrel 64. 65 is a plunger, and the cylinder portion 63 of the spindle 60 is provided.
It is inserted so that it can advance and retreat. Reference numeral 631 denotes a positioning compression spring, and the cylinder portion (of the main shaft 60) is provided.
The plunger 63 is arranged between the bottom surface of the plunger 63 and the plunger 63. For this reason, the upper surface of the plunger 63 is pressed against the rear end of the ball mandrel 64.

Reference numeral 70 denotes a clamp mandrel, which is inserted into the opening at the tip of the pipe material P. This clamp mandrel 70
Is used to bend the pipe material P by the clamping means 40.
This is for preventing the pipe material P from being deformed when it is held at 0.

Next, the operation of the pipe bending apparatus M will be described with reference to FIGS.

First, as shown in FIG. 1, the mandrel 60 is inserted into the pipe material P. Then, the main mandrel 60 is brought into contact with the bending mold 20 with the vip material P inserted. Thereafter, the pressing die 30 is operated to press the pipe material P against the bending die 20. Thereafter, the clamp mandrel 70 is inserted through the opening at the tip of the pipe material P, and the ball mandrel 64 is pushed in against the elasticity of the compression spring 62. In this state (the state of FIG. 1), the clamp mandrel 70 is fixed to the pipe material P. And the clamp part 80 of the pipe material P is clamped by the clamp means 40,
As shown in FIG. 2, the pipe material P is bent by rotating the bending die 20 clockwise. At this time, with the return of the compression spring 62 in accordance with the extension of the pipe material P, the main mandrel 60 and thus the ball mandrel 64 advance following the clamp mandrel 80, and the bending mold 20 is rotated by the target angle. Stop (see state in FIG. 2). Then, the clamp member 40 and the pressing die 30 are released, and the pipe material P is removed from the main core 60.

[0016]

According to the present invention, there is provided an apparatus for attaching a spindle to a pipe bending apparatus according to the present invention, wherein a bending die and pressing means are provided on a frame, and the spindle is attached via an attachment holder.
And, a clamping means is installed on the bending mold, and the main mandrel is inserted into the pipe material and a clamp mandrel is inserted into a tip end of the pipe material. In this state, the pipe material is removed by the clamping means. together sandwiching the bending mold to press the pipe into the bending tool by the pressing means, and, for bending pipes main equipment bending the pipe while rotating the bending tool together with the clamping means
In mandrel mounting device, said main mandrel is interposed compressed elastic means between the mounting holder and Shukokoro gold with are pivotally attached to the ball mandrel into the distal end surface, the attachment of the Shukokorokin Because it can be pushed into the holder against the elasticity of the compression elastic means,

As shown in FIG. 1, when inserting a clamp mandrel into the tip end of a pipe material, the ball mandrel and, consequently, the main mandrel are pushed in the direction of the mounting holder against the elasticity of the compression elastic means. As a result, most of the space for accommodating the ball core in the pipe material can be arranged inside the bending start point of the pipe material (on the side of the mounting holder), so that the clamp portion of the pipe material can be shortened. .

Therefore, if the mandrel mounting device for a pipe bending device according to the present invention is used, the pipe material can be bent in a state of an appropriate length. As a result of omitting the process, the bending efficiency of the pipe material is improved and the yield in bending the pipe material is improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main core mounting device for a pipe bending device according to the present invention in a plan view (with a pipe material mounted).

FIG. 2 is a cross-sectional view of the main metal mounting device for a pipe bending device in a plan view (in a state where a pipe material is bent).

FIG. 3 is a diagram of a conventional example corresponding to FIG. 1;

FIG. 4 is a diagram of a conventional example corresponding to FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Frame 20 ... Bending mold 30 ... Pressing mold (pressing means) 50 ... Mounting holder 60 ... Main mandrel 40 ... Clamping means P ... Pipe material 70 ... Clamping mandrel 64 ... Ball mandrel 62 ... Compression spring (compression elastic means) ) M ... pipe bending device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B21D 9/03 B21D 7/025

Claims (1)

(57) [Claims] 1. A frame is provided with a bending die and pressing means, a main shaft is mounted via a mounting holder, and
Clamping means is installed on the bending mold, and the main mandrel is inserted into the pipe material and a clamp mandrel is inserted into the tip end of the pipe material. In this state, the pipe material is bent by the clamping means. the pressing the pipe on the bending tool by the pressing means with clamping and winding the pipe bending apparatus for main mandrel bending the pipe while rotating the bending tool together with the clamping means
In biasing device, said main mandrel is interposed compressed elastic means between the mounting holder and Shukokoro gold with are pivotally attached to the ball mandrel into the distal end surface, said Shukokorokin to said mounting holder On the other hand, a main shaft mounting device for a pipe bending device, which can be pushed in against the elasticity of the compression elastic means.