CN2424855Y

CN2424855Y - Fitting type broaching tool

Info

Publication number: CN2424855Y
Application number: CN 00228096
Authority: CN
Inventors: 胡悦怡
Original assignee: Xiangji Metal Products Co ltd
Current assignee: Xiangji Metal Products Co ltd
Priority date: 2000-05-12
Filing date: 2000-05-12
Publication date: 2001-03-28
Anticipated expiration: 2010-05-12

Abstract

The utility model discloses a fitting type broaching tool, which comprises a knife bar, blades and a fastening piece. At least two pieces of blades is sheathed on the knife bar, and the blades is tightened by the fastening piece, which is positioned on the front and the back ends of the knife bar, and is movably connected with the knife bar. The front end of the knife bar can be connected with a pull bar, a spacing sleeve is arranged between every two adjacent blades, and the diameter of the blades is increased from the front end of the knife bar to the back end of the knife bar one by one. The fitting type broaching tool can thoroughly clean up obstructions of a steel pipe, which makes the inside of the pipe smooth and clean, and can raise the concentricity of a plastic lining layer when the inside of the pipe is lined with plastic.

Description

The assembled broaching tool

The utility model relates to a kind of cutting element, especially relates to a kind of assembled broaching tool of removing barrier in the steel pipe.

In the prior art, common useful flexible axle drilling tool, instruments such as pneumatic impact wrench and high-pressure fluid spray gun are removed the barrier in the steel pipe, and these instruments can reach certain cutting effect, are applicable to the steel pipe of no specific use.But need serve as a contrast the welding galvanized pipe of moulding for some, remove the barrier such as convex weld, list edge in the steel pipe, the cutting of these instruments does not just reach requirement, the residual volume of convex weld is bigger, especially the cutting in the long steel pipe is seemed that efficient is lower, mould in the process of layer at inner lining of steel pipe like this, greatly reduce the concentricity of lining, finally reduced the construction quality of pipeline.

The purpose of this utility model provides a kind of assembled broaching tool that can thoroughly machine away the interior convex weld of long and short steel pipe and other barrier.

For achieving the above object, the utility model comprises knife bar, blade and securing member, have at least two blades to be sleeved on the knife bar, tighten up with the movable securing member that connects of knife bar by being positioned at the knife bar front and back ends, be provided with spacer sleeve between every adjacent knife blades, the diameter of blade increases one by one from knife bar front end to rear end.

As further improvement of the present utility model, between the securing member of knife bar front end and minimum diameter blade, be provided with the frustum of fluting, make broaching tool enter in the pipe easily; Between the securing member of knife bar rear end and maximum gauge blade, be provided with gland, be convenient to fastening.

As further improvement of the present utility model, the rear side of each blade is provided with cushion rubber, and the diameter of cushion rubber is identical with the diameter of maximum blade, has prevented the eccentric cutting of blade.

After adopting such structure, compare with prior art and to have following advantage: during (1) cutting, blade is ascending to be cut layer by layer to barrier in the steel pipe, and spacer sleeve is as chip space between the blade, guarantee the smooth, clean of the interior cutting of pipe, also can suitably increase the internal diameter of steel pipe simultaneously; (2) each blade rear side is provided with the cushion rubber with maximum blade same diameter, and resilient cushion rubber contacts with tube wall, prevents blade eccentric cutting in complex-shaped tube chamber, in the time of can guaranteeing that managing liner moulds, and the concentricity of plastic lining layer; (3) whole broaching tool can assemble according to the length of cutting steel pipe, and is convenient and swift.

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the side schematic view of wherein a kind of assembled broaching tool of the utility model;

Fig. 2 is the blade side view of assembled broaching tool shown in Figure 1.

As shown in Figure 1, the assembled broaching tool comprises knife bar 1, blade and securing

member

3,6, have at least two blades to be sleeved on the knife bar 1, by being positioned at the knife bar front and back ends, tighten up with the movable securing member that connects of knife bar, the frustum 5 of a fluting is arranged between the blade 21 of the securing member 3 of knife bar front end and diameter minimum, and groove can be aimed at convex weld makes broaching tool enter in the pipe easily; Between the securing member 6 of knife bar rear end and the maximum blade 22 of diameter, gland 10 is arranged, be convenient to fastening blade, the diameter that is sleeved on knife bar 1 cutter increases one by one from knife bar front end to rear end, during cutting, blade is ascending to be cut layer by layer to barrier in the steel pipe, guarantee the smooth of the interior cutting of pipe, also can suitably increase the internal diameter of steel pipe simultaneously; Be provided with spacer sleeve 7 between every adjacent knife blades, spacer sleeve 7 had both held out against the cushion rubber 8 of blade and blade rear side, blade is maintained a certain distance, enough chip spaces are provided, the arc groove 9 of the barrier that cuts below blade land as shown in Figure 2 enters chip space; Cushion rubber 8 diameters of each blade rear side are identical with the diameter of maximum blade 22, and resilient cushion rubber 8 contacts with tube wall, prevent blade eccentric cutting in complex-shaped tube chamber, in the time of can guaranteeing that managing liner moulds, and the concentricity of plastic lining layer.

During built-up broach, there is externally threaded knife bar 1 rear end to be screwed into two nuts at two ends earlier,, is inserted in gland 10 from knife bar 1 front end in order then as the securing member 6 of rear end, cushion rubber 8, the blade 22 of diameter maximum, spacer sleeve 7 is formed last cutting unit; And being inserted in cushion rubber 8, blade 2 and spacer sleeve 7 are formed second cutting unit reciprocal, repeat afterwards to be inserted in and second assembly that cutting unit reciprocal is identical, but the diameter of blade reduce gradually; Arrived last cutting unit, be inserted in cushion rubber 8 and diameter smallest blades 21 after, be inserted in the frustum 5 of fluting, screw on as the nut of end fastener 3 before the knife bar 1, compress the whole parts on the knife bar.What and blade space of blade assembles according to the steel pipe length of cutting, knife bar can connect upper connecting rod 11 foremost, pull bar is contained on the broaching machine of long stroke and spurs broaching tool to cutting in the steel pipe.

Claims

1, a kind of assembled broaching tool, comprise knife bar (1), blade and securing member (3,6), have at least two blades to be sleeved on the knife bar (1), tighten up by being positioned at the movable securing member that connects of knife bar front and back ends and knife bar, it is characterized in that: be provided with spacer sleeve (7) between every adjacent knife blades, the diameter of blade increases one by one from knife bar front end to rear end.

2, assembled broaching tool according to claim 1 is characterized in that: be positioned at the frustum (5) that is provided with fluting between the securing member (3) of knife bar front end and the minimum diameter blade (21).

3, assembled broaching tool according to claim 1 is characterized in that: be positioned between the securing member (6) of knife bar rear end and the maximum gauge blade (22) and be provided with gland (10).

4, assembled broaching tool according to claim 1 is characterized in that: the land below of blade is provided with arc groove (9).

5, according to each described assembled broaching tool of claim 1 to 4, it is characterized in that: the rear side of each blade is provided with cushion rubber (8).

6, assembled broaching tool according to claim 5 is characterized in that: the diameter of cushion rubber (8) is identical with the diameter of maximum blade (22).