JPH0390221A - Deburring method for tubular member - Google Patents

Abstract

PURPOSE:To continuously and automatically deburr a tubular member by pushing a plug back through a plug driving member into a jig after deburring is completed. CONSTITUTION:The plug jig 3 is inserted into the inner space 1a of the tubular member 1 to be positioned so that the plug 2 is matched to each hole to be worked. The plug driving member 4 is lowered, a hook-like part 4a is inserted into the engagement hole 2a of the plug 2, turned 90 deg. and the engagement hole 2a of the plug 2 is engaged with a hook-like part 4a of the driving member 4 of the plug. The plug driving member 4 is raised and the plug 2 cooperates with the jig 7 to form a deburring part 1b. When deburring is completed, the plug driving member 4 is moved downward and the plug 2 is reset to the plug jig 3. The plug driving member 4 is turned 90 deg. and engagement between the hook part 4a and the engagement hole 2a of the plug 2 is released and the driving member 4 is removed upward. The plug jig 3 is taken out of the inner space 1a of the tubular member 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for burring a tubular member such as a floor duct.

(Prior art) When performing burring on a relatively long tubular member with a small inner diameter, such as a floor duct buried in the floor of a building, there are the following technical difficulties in the shell: There is. In other words, since the inner diameter of the workpiece is small, it is difficult to insert a processing tool inside the workpiece, especially when it is necessary to perform burring in the center of the workpiece.
Since the processing tool must be inserted deep into the workpiece and burring requires a very large force, it is necessary to insert the processing tool inserted into the workpiece Q from the inside to the outside. It is difficult to perform burring by extruding.

In order to perform burring on a tubular member while solving such technical difficulties, the following method has conventionally been adopted. That is, the plug that directly engages with the workpiece to perform the burring process and the plug driving member that applies force to the plug and moves it are separate members. First, the plug is attached to a plug jig, and a pilot hole is drilled at the position where the tubular member is to be burred. Next, a plug jig is inserted into the tubular member, and the plug on the plug jig is aligned with the hole formed by pilot hole machining (hereinafter referred to as a hole to be machined) and stopped.

Here, a plug driving member is inserted into the hole to be machined from outside the tubular member, and the tip of the plug driving member is engaged with the plug. Then, force is applied to the plug by the plug drive member, and burring is performed around the hole to be processed while pulling the plug out of the hole to be processed. When the burring process is completed, the plug jig is taken out from inside the tubular member, and the plug that is engaged with the plug drive member is removed and set in the plug jig in preparation for the next burring process.

(Problem to be Solved by the Invention) However, in the conventional burring method, after the burring process is completed, the operator must manually remove the plug that is engaged with the plug drive member and set it in the plug jig. Therefore, there is a problem that burring cannot be performed continuously and automatically, making it difficult to improve work efficiency.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for burring a tubular member, which allows continuous burring by automatically returning the plug into the plug jig after burring is completed. .

(Means for Solving the Problem) In order to achieve the above-mentioned object, in the present invention, a hole is formed at a burring position of a tubular member, and a burring plug housed in a plug jig is placed inside the tubular member. inserting the plug into the hole, inserting a plug drive member into the hole from outside the tubular member to engage the plug, and causing the plug drive member to move the plug into the hole. burring around the hole by moving the plug outward and engaging the plug with the hole;
In the method for burring a tubular member, the burring process is completed while the plug is engaged with the tubular member, and after the burring process is completed, the plug driving member is moved inward of the tubular member, The method is characterized in that the plug is returned into the plug jig located inside the tubular member through the hole to be processed.

(Function) In the burring method with this configuration, the plug is automatically returned to the plug jig inside the tubular member through the hole to be processed after the burring process is completed, so the plug must be removed manually after each cycle of the burring process. There is no need to reset the plug jig.

(Example) The following is a perspective view of an example of the present invention immediately after being subjected to burring processing, with reference to the drawings.
1 is a tubular member which is a workpiece, 2 is a plug for burring, 3 is a plug jig for storing the plug 2, and 4 is a plug driving member for displacing the plug 2. FIG. 1 shows that after the burring process is completed, the plug jig 3 moves in the direction A from the internal space 1a of the tubular member l, and the burring part 1b
This shows a state in which the plug drive member 4 has moved in the B direction from the processed hole 1c of the tubular member l in which the hole 1c has been formed. In the figure, 2& is an engagement hole formed in the plug, and the hook-shaped portion 4a of the plug driving member 4 is detachably engaged with this engagement hole 2a.

FIG. 2 is a perspective view of the tubular member l after the burring process, and the tubular member l has six burring parts 1b.
is formed.

3 to 13 are diagrams showing each step of the burring method of the present invention, and the burring method of the present invention will be explained below with reference to these figures.

First, as shown in FIG. 3, the plug 2 is set in the plug jig 3. As shown in FIG. 2, in order to form six burring portions on the tubular member l at once, the plugs 2 are respectively set in six plug jigs 3 arranged at predetermined intervals.

On the other hand, the burring portion of the tubular member 1 is drilled with a drill 5, and holes 1c to be machined corresponding to the number of burring portions to be formed are formed.

When the above processing preparations are completed, as shown in Figure 5,
The plug jig 3 is inserted into the internal space l of the tubular member l,
As shown in FIG. 6, the plug 2 is positioned to align with each hole 1c to be processed.

At this time, a burring jig 7 is placed around the hole 1c of the tubular member 1 to be processed.

Here, as shown in FIG. 7, the plug driving member 4 descends, inserts its hook-shaped portion 4a into the engagement hole 2a of the plug 2, and then rotates by 90 degrees as shown in FIG. do,
Engagement hole 2a of plug 2 and hook-shaped portion 4a of plug drive member 4
engages with.

When the engagement between the plug 2 and the plug drive member 4 is completed, the plug drive member 4 is raised as shown in FIG. As a result, the plug 2 engages around the hole 1c to be processed in the tubular member 1, and cooperates with the jig 7 to form a burring portion 1b around the hole 1c to be processed. At this time, since the peripheral surface (processed surface) of the plug 2 has a sufficient length, the burring process is completed while the plug 2 remains engaged with the burring part ib, as shown in FIG. There is.

When the burring process is completed, the plug drive member 4 is moved to the ninth position.
Move downward from the position shown in the figure and reset the plug 2 to the plug jig 3 as shown in Figure 1O.

Then, as shown in FIG.
Rotate by 0 degrees, and as shown in FIG. 12, disengage the hook-shaped portion 4 of the plug drive member 4 from the engagement hole 2a of the plug 2, and remove the plug drive member 4 from the hole 1c to be machined. Pull it out upwards. Then, as shown in FIG. 13, the plug jig 3 is taken out from the internal space 1& of the tubular member 1 in preparation for the next burring process.

In the above embodiment, the plug 2 housed in the plug jig 3 is held down by a spring (not shown) to prevent relative rotation with respect to the plug jig 3, and is also prevented from being lifted from the plug jig 3. ing.

(Effects of the Invention) As explained above, according to the method for burring a tubular member of the present invention, after the burring process is completed, the plug is pushed back into the plug jig by the plug driving member, so that the operator can manually hold the plug. There is no need to reset the plug jig. Therefore, it becomes possible to perform the burring process continuously on the tubular member, and automation can be achieved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the tubular member and the processing tool at the time when the burring method of the present invention is completed, FIG. 2 is a perspective view of the burred tubular member, and FIGS. 3 to 13 are, respectively, FIG. 3 is a diagram showing each step in implementing the method of the present invention, FIG. 3 is a step of setting a plug in a plug jig, FIG. 4 is a step of drilling a pilot hole in a tubular member, and FIG. FIG. 6 shows the step of inserting the plug into the tubular member, FIG. 6 shows the step of aligning the plug with the hole to be machined, and FIG. 7 shows the step of inserting the hook-shaped part of the plug drive member into the retaining hole of the plug. Figure 8 shows the process of engaging the hook-shaped part of the plug drive member with the engagement hole of the plug, Figure 9 shows the burring process, Figure 1O shows the plug reset process, and Figure 11 shows the plug drive member. FIG. 12 shows the step of releasing the engagement with the plug, FIG. 12 shows the step of pulling out the plug driving member, and FIG. 13 shows the step of removing the plug and the plug jig from the tubular member. ■...Tubular member lb...Verge 2...Plug 3...Plug jig 4a...Hook-shaped portion 1m...Internal space lc...Work hole 2a...Engagement hole 4... Plug drive member 7... Jig ring part q → q Fig. 7 Fig. 9

Claims (1)

[Claims] (1) A hole is formed at the burring position of the tubular member, a burring plug housed in a plug jig is inserted into the tubular member, the plug is placed in a position aligned with the hole, and the burring Inserting a plug driving member into the hole from the outside of the member and engaging the plug, moving the plug outward of the hole by the plug driving member, and engaging the plug with the hole. In a method for burring a tubular member, in which a burring process is performed around the hole, the burring process is completed while the plug is engaged with the tubular member, and after the burring process is completed,
moving the plug drive member inwardly of the tubular member;
A method for burring a tubular member, comprising returning the plug through the burred hole into the plug jig located inside the tubular member.