JPS63171222A - Pipe material burring processing equipment - Google Patents

Abstract

PURPOSE:To enable a mass production with less workers by forming a flange part by extruding a spherical punch from the side hole of a pipe stock with the cooperation of the punch holding means inserted from both ends of the pipe stock and a punch pressing means. CONSTITUTION:A pair of holder blocks 7, 8 are set each other and after constraining the blocks 7, 8 to avoid a die opening by supporting a pipe stock P forming a prepared hole H in advance with its constraint a cam pin 13 is descended for the punch 10 on a supporting pin 12. When a cam face 15 is brought into contact with the punch 10 with the descent of the cam pin 13, the punch 10 is extruded toward the outside from the inside of the pipe stock P with being guided by a guide groove 12. In the process of the punch 10 being extruded the peripheral edge part of the prepared hole H is spreaded to form the flange part F having the inner diameter equiv. to the diameter of the punch 10. A mass production is thus enabled by eliminating the need for a troublesome arrangement work.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an apparatus for forming seven flange parts on a part of a cylindrical body of a pipe material by a purling process.

Conventional technology For example, Ift: As shown in Figure 10, @, a hole is formed to secondarily form a flange portion F on a part of a cylindrical body (hereinafter simply referred to as the body) B of a pipe material P. In this case, as shown in FIG. 0, it is preferable to use a so-called purring process in which a pilot hole H previously formed in the body B is expanded outward.

For example, as shown in Figure @l1, the pipe material Pt is restrained and supported by the holder blocks 1 and 2 having a split structure, and the spherical punch 3 is inserted into the inside of the pipe material P, while the eyepole) 4t is inserted from the prepared hole H side. - Insert and screw together with the punch 3. Then, by a pulling means not shown, the eye bolt 4t is connected to the punch 3t? By pulling it out, the peripheral edge of the pilot hole H expands to form the 7 flange portion F.

Problems to be Solved by the Invention When the device structure as described above is adopted, it is necessary to connect and disconnect the punch 3 and the eye bolt 4 each time, and when connecting the punch 3 and the eye bolt 4, it is necessary to 5 is troublesome and requires a lot of man-hours for setup work. However, it was not suitable for mass production, which involves processing large amounts of pipe material.

Means for Solving the Problems The present invention aims to provide an apparatus that can efficiently perform the purling process on pipe materials as described above. A device for bending and forming a flange portion protruding perpendicularly to the axis of a cylindrical body by performing burring to widen and expand a pre-formed pilot hole, the support for restraining and supporting a pipe material. means, and a punch forming a spherical surface to be inserted into the inside of the pipe material.
A punch holding means is inserted from one end of the pipe material and holds the punch on the axis of the prepared hole, and a slope portion is formed at the tip of the pipe material and is inserted from the other end of the pipe material and comes into contact with the punch. and a punch pressing means for pushing the punch from the inside to the outside of the cylindrical body in cooperation with the holding means.

Function As described above, if the punch pressing means is pushed in while the punch is held on the axis of the pilot hole by the punch holding means, the punch is pushed out by contact with the sloped part of the punch pressing means, and the flange part is pushed out. molded.

Embodiment Figures 1 to 3 are diagrams showing the first embodiment of the present invention.
is a lower holder; 7 and 8 are holder blocks with a nine-part structure provided as supporting means on the lower holder 6; by aligning these pair of holder blocks 7 and 8 with each other, a pilot hole H is formed in advance. The pipe material P is restrained and supported. One holder block 7.8 is formed with an escape hole 9 for forming a flange liF.

10 A spherical punch inserted into the inside of the pipe material P, f
＠ as a punch holding means fixed to the lower holder 6
This holding pin IH-t is inserted into the inside of the pipe material P from Tm of the pipe material P, while an arcuate guide 1' equal to the curvature of the punch lO is provided on the obliquely cut upper end surface.
1l12 is formed. The height position of the guide groove 12 is set at a position where the center of the punch 10 placed on the guide groove 12 and the axis of the flange portion F to be formed coincide with each other.

13 is a cam pin as a punch pressing means inserted from the upper end of the Hype material P. This cam pin 13 fl is fixed to a press ram 14 that moves up and down relative to the lower holder 6, for example, while a punch 10 [@ oblique A cam surface 15 having a shape is formed.

According to this embodiment, as shown in FIG. 1, the pair of holder blocks 7 and 8 are restrained by a pressure means (not shown) so as not to open the mold, and then the cam pin is pressed against the punch 10 with the holding pin ll. Lower by 1:l. When the cam pin 13 descends, its cam surface 15 contacts the punch IO, and the punch IO
is pushed out from the inside of the pipe material P toward the outside while being guided by the guide groove 12. Then, the punch lO is pushed out and the peripheral edge of the prepared hole H is expanded by the filtering hole, forming a seven-lunge $F having an inner diameter equal to the diameter of the punch lO.

FIGS. 4 and 5 are diagrams showing a second embodiment of the present invention. In this embodiment, the recovery of punches and the like are completely automated based on the structure of the first embodiment.

In Fig. 4 and @Fig.
A holder block 18, which constitutes the entire holding means, is fixed to the lower holder 16 along with the pads mentioned above, and a pair of slide cams 21 and 22, to which a holding bottle 19 and a cam pin 20 are fixed, are fixed to the lower holder 16. Blocks 18 and 18 are arranged so as to face each other.

The holder block 18 has an escape hole 23 and a die 24 is buried therein.
A ninth punch collection hole 26 for collecting 5 punches is formed. A lifter block 28 is disposed on the lower holder 16 side and moves up and down by the action of a cylinder n, and the lifter block 28 is connected to the punch recovery hole 26.
It has a function of pushing up the punch 25 collected from the pipe material P to the same height position. 29 This is a guide plate that regulates the ascending and descending locus of Havonte 25.

On the other hand, a pad 30 for restraining the pipe material Pt is elastically supported on the drive holder 17 via an elastic body 31, and a pair of drive cams 3 corresponding to the slide cams 21 and 22 are supported on the drive holder 17.
1 and 32 are fixed. And slide cam 2
1 and the drive cam 31 and the slide cam 22 and the drive cam 32 come into sliding contact with each other, so that the holding bin 19
And the cam bin 20 slides. 33 are return springs that bias the slide cams 21 and 22, respectively.

In this embodiment, the pipe material P? Once set, the upper holder 17t is lowered to perform molding, but at this time, it is pushed up by the punch 25 and the half lifter block 28 and is waiting at the imaginary line position Q1.

Then, when the upper holder 17 descends, the pad 30 moves to the pipe material P? After pressing, the drive cam 31 and the slide cam 21 and the drive cam 32 and the slide cam 22 sequentially come into sliding contact. When the slide cam 21 moves forward due to the sliding contact between the drive cam 31 and the slide cam 21, the holding bin 19 enters the inside of the pipe material P from one end along with the punch 25, and holds it at the punch 25t-imaginary line position 11Q2. At the same time, lifter block 29 is 1 in WJ4 diagram! Descend to the line position and wait.

On the other hand, when the slide cam n moves forward due to the sliding contact between the drive cam 32 and the slide cam 22, it enters the inside of the cam bin 2012 from the other end of the vibe material P, and its oblique cam surface comes into contact with the punch 25. As a result, the punch 25 sandwiched between the holding pin 19 and the cam pin 20 is pushed out of the relief hole 23 due to the slope effect of each cam surface, thereby forming the flange portion F.

The punch 251-t pushed out from the relief hole 23 passes through the punch recovery 26 and is guided onto the lifter block device, where it waits until the next cycle.

When the upper holder 17 is raised after the completion of forming the flange portion F, the slide cams 21 and 22 are moved backward by the action of the return spring wings, and the holding pin 19 and the cam pin are removed from the pipe material P. Then, after waiting for the holding bin 19 to retreat to the most retracted position, the lifter block 4 rises to push up the punch 25, and thereafter the above-described operation is repeated.

Here, in the second embodiment, all the drive cams 31 and 32 and the slide cam 21 are used for the vertical movement of the water table 17.
, 22, the holding bin 19 and the cam bin 20 are converted into sliding motion, but the holding bin 19 and the cam bin 20 may also be directly slid by, for example, a hydraulic cylinder.

6 to 9 are diagrams showing the @3 embodiment of the present invention, and in this embodiment, the 1. Second Example and J! The punch is always attached to the holding bottle.

6 and 7, the holder block 35 is fixed to the lower holder 36, the pad 37 is elastically supported by the upper holder 41 via the spacer wings, the pack plate 39, and the elastic body 40f. There is. Further, the pad 37 is provided with a knockout bottle 43 which is biased by an elastic body center.

Reference numeral 44 denotes a holding bottle with a slanted tip. As shown in FIG. A generally spherical punch 46 is slidably connected to the groove.

47 Hakambin, with a punch 46 at the tip of the cambin 47.
In addition to forming an oblique cam surface 49 corresponding to the side cam surface 48, a slot mso capable of receiving the tip of the holding bottle 44 is formed.

In this embodiment, as shown in FIG. 9, inside the t-pipe material P that is set above the holder block, the paddle holding bin 44 and the cam bin 47 are opposed to each other, and the pad 37
Press the yoshivibe material P=2. Then, when the holding pin 44 and the cam bin 47 are advanced by the same amount from the state shown in FIG. 9, the punch 46 is coming into sliding contact with the holding pin 44.
14').

That is, the punch 41t sandwiched between the holding bin 44 and the cam bin 47
After forming the flange IIF, when the holding pin 44 and the cam pin 47 are retreated, the punch 46 and the cam pin 43 are pushed out along the axial direction of the flange part F, thereby forming the flange part F. It is pushed back to holding bin 4.
Even after the punch 46 is extracted from the 4t-pipe material P, the punch 46 is self-retained in the holding bin 44 by the dovetail groove connection.

In the case of this embodiment, since the punch 44 is always attached to the holding bottle 44, there is no need to collect the punch each time as in the second embodiment.

Effects of the Invention According to the present invention, a spherical punch is extruded by cooperation between a punch holding means inserted from both ends of a pipe material and a punch pressing means to perform purling on a flange portion. Processing can be performed efficiently without the need for troublesome setup work, and productivity is significantly improved.

[Brief explanation of the drawing]

Figure @1 is a sectional view showing the first embodiment of the present invention, Figure @2 is a perspective view of Figure 1, Figure 3 is a sectional view taken along line I-1 in Figure 1, and Figure 4 is a cross-sectional view of the first embodiment of the present invention. Cross-sectional view showing the second embodiment of the invention, No. 5
The figure is a sectional view taken along the v-v line in Fig. 4, I! Fig. 6 is a sectional view showing the third embodiment of the present invention, and Fig. WJ7 is a cross-sectional view showing the third embodiment of the present invention.
■A cross-sectional view along the line, Figure 8 is an exploded perspective view of the main part of Figure 6,
Figure 9 is an explanatory diagram of the operation of Figure 6, 109th prisoner, @ ,
(C) A An explanatory diagram showing the forming process 8 of pipe material, and FIG. 11 is a sectional view of a conventional processing device. 7.8...Holder block as support means, IO・
...Punch, 11... Holding bottle as punch holding means, 13... Cam pin as punch pressing means, 15
...Cam surface as a slope portion, 18...Holder block, 19...Holding bin, 20...Cam bin, 25...
... Punch, 30... Pad (supporting means), A...
Cam surface, 35... Holder block, 37... Pad, shrine... Holding bottle, 46... Punch, 47... Cam pin, 49... Cam surface, P... Pipe material, B・・・
- Cylindrical body, H... pilot hole, F... flange part. Fig. 1 7.8----Izu\Rudabros'7 15-1---
Zumu Cl0---r gunna P----
---Ha If Journey 11-----41: *Pia
H-1---IK13---Zumbin
F--1--Frump County Figure 6 Figure 10 (A) (B) (C) Figure 11

Claims (1)

[Claims] (1) A device that performs a purring process to widen and widen a pilot hole previously formed in a cylindrical body of a pipe material, and then bends and forms a flange that protrudes in a direction orthogonal to the axis of the cylindrical body. A support means for restraining and supporting the pipe material, a punch having a spherical surface that is inserted into the pipe material, and a punch that is inserted from one end of the pipe material to hold the punch on the axis of the prepared hole. The punch holding means is inserted from the other end of the pipe material, and a sloped portion that contacts the punch is formed at the tip, and in cooperation with the punch holding means, the punch is directed from the inside to the outside of the cylindrical body. A purling processing apparatus for pipe material, characterized in that it is comprised of a punch pressing means for extruding.