KR20030063286A - Manufacturing processs of scarffing pipe's connecting pin - Google Patents

Abstract

PURPOSE: An apparatus for forming scaffolding pipe connecting pins is provided to improve productivity and obtain solid connecting pin body without welding front and rear connection parts of cut element by continuously forming steel plate workpiece from first and second notching cutting processes to post-treatment process. CONSTITUTION: The apparatus is characterized in that first notching cutting die, second notching cutting die, wave type upper and lower dies(8a,8b), upper and lower dies(9a,9b) the central part of which is formed in a curved shape and pipe forming upper and lower dies(10a,10b) are installed on upper and lower workbenches(11a,11b) with being spaced apart from each other in a certain distance so that cut elements(1a,1b,1c) are transferred between the upper and lower dies by conveyor, left side front and rear catching grooves, front and rear transfer pin inserting holes, transfer band of one side, connection part of the transfer band and front side surface cutting part are notching cut in first notching cutting process, a flat plate shaped cut element(1a) is obtained by notching cutting right side front and rear catching grooves, front and rear stiffening ring compression holes, other side transfer band, connection part of the other side transfer band and rear side surface cutting surface in second notching cutting process, a wave type cut element(1b) is formed by transferring the cut element(1a) to a space between the upper and lower dies(8a,8b) using the conveyor in first bending process, a gutter shaped cut element(1c) is formed by transferring the formed cut element(1b) to a space between the upper and lower dies(9a,9b) the central part of which is formed in a curved shape in second bending process, the gutter is formed into a pipe by transferring the formed cut element(1c) to a space between the pipe forming upper and lower dies(10a,10b) in third bending process, and a connection part of connecting pin body connected to the transfer band is cut in post-treatment process.

Description

Manufacturing process of scarffing pipe's connecting pin}

The present invention relates to a molding apparatus for pipe connecting pins for scaffolds mainly used in construction sites.

Conventionally, scaffolding pipe connecting pin forming apparatus has been known, but it cuts a pipe having a thickness of about 3mm to a predetermined length to form a guide and a locking groove at both ends thereof, and a reinforcement of a separate pipe at the center. It is fixed by inserting the ring for molding, such a molding apparatus or method has a problem that the productivity is lowered due to the occurrence of a lot of defective products, so as to improve the advantage "Applicant's application for registration of a single-pipe connecting pin (utility model registration agent) No. 260675) ", when cutting 3mm thick steel plate, notching cut by press to make the locking groove and the locking jaw at the same time, then folded it into a tubular shape, and then welded the joints thereof. The cost savings were effective, but the defects in the welding work and the deterioration of the supporting strength due to the material deterioration in the welding process of the joint A.

The present invention has been made to solve the above problems, the subject matter of the present invention is to install a primary and secondary notching cutting mold, upper and lower wave molds, center curved mold, tubular molding mold on the work table at regular intervals, the upper and lower molds By installing a conveyor line to transfer the cutting pieces between the materials to form a connecting pin body in a continuous process, the description of the forming process, the first notching cutting process 101 of the iron plate → the second notching cutting process (102) → The first bending process (103) → The second bending process (104) → The third bending process (105) → The post-treatment process (106) is composed continuously to improve the productivity of the product, such as shortening the work time It is an improvement.

1 is a device schematic diagram of the present invention

FIG. 2 is a longitudinal cross-sectional view of the A, B and C portions of FIG.

3 is a process display diagram of the present invention

Figure 4 is a perspective view of the connection pin unfolded state of the present invention

Figure 5 is a perspective view of the connecting pin product of the present invention

* Explanation of symbols for main parts of the drawings

1-Connecting Pin Body 1a, 1b, 1c-Cutting 2

3-feed fitting 4-reinforcement ring crimp 5, 5a-side cut

6-feed band 6a connection 7-1st notching cutting mold

7a-second notched cutting mold 8a, 8b-wave type

9a, 9b-Center Curved Upper and Lower Molds 10a, 10b-Tube Molding Upper and Lower Molds

11-upper workbench 11a-lower workbench12-conveyor

(101) primary notching cutting process (102) secondary notching cutting process

(103) First Bending Process (104) Second Bending Process

(105) Third Bending Process (106) Post-Processing Process

First, in the apparatus thereof, the first notch cutting mold 7, the second notch cutting mold 7a, the wave-shaped upper and lower molds 8a and 8b, and the center curved shape with a predetermined interval on the upper and lower work benches 11 and 11a. The upper and lower molds 9 and 9a and the tubular molding upper and lower molds 10a and 10b are installed, and a conveyor 12 for transferring the cutting pieces 1a, 1b and 1c is installed between the upper and lower molds. The installed locking hole is to be caught by the locking pin installed on the worktable (11) (11a).

And the implementation process thereof will be described in detail with reference to FIGS. 3 and 2 as follows.

(1) First Notching Process (101)

In the notching cutting of 3mm thick steel plate according to the purpose, the front and rear locking groove 2 and the two front and rear transfer pin fitting holes 3 and the transfer band 6 on one side and its connecting portion 6a and the front side cutout Notch cut (5).

(2) Notching Process (102)

The front and rear engaging holes (2) and the front and rear reinforcing ring pressing holes (4), the other transfer band (6), the connecting portion (6a) and the rear side cutout portion (5a) of the left side cut in the above step is notched cut The cut piece 1a of the phase is shaped.

(3) 1st bending process (103)

The flat cut piece 1a obtained in the above notching step is transferred between the wave-shaped upper and lower molds 8a and 8b as shown in "A of FIG. 2", and the upper die 8a is pressed down by a press. The flat cut piece 1a is formed into a wave shaped cut piece 1b.

(4) Secondary Bending Process (104)

The wave-shaped cut piece 1b obtained in the first bending process is transferred between the center curved upper and lower molds 9a and 9b as shown in " B " in FIG. 2, and the upper mold 9a is pressed down to form a trough shape. The cut pieces 1c are molded.

(5) 3rd Bending Process (105)

By transferring the groove-shaped cut piece 1c with the cut portion obtained in the secondary bending process between the tubular upper and lower molds 10a and 10b as shown in FIG. 2C, and pressing the upper die 10a downwardly. The trim obtains a tubular connecting pin body 1 which is fully tightly coupled.

(6) 6th process-post-processing process (106)

The connecting pin body 1 is completed by cutting the connecting part 6a of the transfer band 6 connected to the left and right sides of the tubular connecting pin body 1.

If the above-described implementation is carried out in a consistent work process, it is possible to obtain a tight and rigid connection pin body 1 without welding the front and rear joints of the cutting piece 1a.

As described above, in the present invention, in forming a connecting pin of a scaffolding pipe used in a construction site, workability is performed by performing a molding process from the primary and secondary notching cutting to the completion of the product in a continuous process. In addition to increasing the pressure, the compression hole (4) formed in the center of the connecting pin body (5) by inserting a reinforcing ring provided separately so that the locking jaw caused by rolling when the crimp can be caught, as well as firmness It is very useful invention because it can greatly contribute to strengthening the market competitiveness because of its acidity and merchandise.

Claims (1)

Primary notching cutting mold (7), secondary notching cutting mold (7a) and wave type upper and lower molds (8a) and (8b) and center curved upper and lower molds (9a) at regular intervals on the upper and lower working tables (11) (11a). ) 9b and tubular mold up and down molds 10a and 10b are installed so that the cutting pieces 1a, 1b and 1c are transferred by the conveyor 12 between the upper and lower molds and the first notching cutting process 101 is performed. ) Notching cut the left front and rear locking groove (2) and the front and rear transfer pin fitting hole (3) and one side of the transfer band (6), its connecting portion (6a) and the front side cut portion (5a) and the second notching cutting process In (102), the right front and rear engagement grooves 2, the front and rear reinforcement ring pressing holes 4, the other transfer band 6, its connecting portion 6a and the rear side cutout portion 5a are notched and cut to cut the flat plate 1a. ) And then transfer it between the wave-shaped upper and lower molds 8a and 8b by the conveyor 12 to form the wave-shaped bending piece 1b and the central curved upper and lower molds 9a. The second bending process 104 for forming the trough-shaped cutting piece 1c by conveying it between the blades 9b and between the tube forming upper and lower molds 10a and 10b to close the troughs to the tubular body. The third bending process 105 and the post-processing step 106 of cutting the connection portion 6a of the connecting pin body 1 connected to the transfer band 6 of the scaffolding pipe connecting pin Molding apparatus.