JP3068262U - Spot peeling cutter - Google Patents

Abstract

(57) [Abstract] (with correction) [PROBLEMS] To provide a long-life spot peeling cutter for cutting a hardened welded portion by employing a cemented carbide alloy for a blade. SOLUTION: The welding portion is reliably positioned, the core is started without swaying, the upper sheet metal and the lower sheet metal are peeled off, and the lower sheet metal part has a flat state without leaving any protrusions and recesses. . Carbide cutting edge 7 effective for cutting weld hardened parts
Was adopted for the outer ring part, and high-speed steel, which is effective for centripetal properties such as displacement, deflection, and swimming, was used for the center drill 3. It features a shared cutting method.

Description

[Detailed description of the invention]

[0001] The present invention relates to a blade for peeling off a sheet metal of a spot welded portion, and reliably removes a welded portion by a freehand operation of an operator without shifting a fixed position. In other words, the spot-peeling cutter is characterized in that a spot-welded circular shape is cut in the upper sheet metal of the overlapped sheet metal, and a minimum center drill mark recess is formed in the lower sheet metal of the overlapped sheet metal, but removed as flat as possible. It is about.

[Prior Art] Conventionally, in order to peel off a sheet metal overlapped at a spot welded portion, a blade having a size larger than that of a spot welding surface is used to weld an upper sheet metal with an area of one steel type and one shape of two blades. This was a work in which the cutting was stopped before cutting the lower sheet metal. However, the life of the blade was short due to the hardening during welding.

[Problems to be Solved by the Invention] For cutting the above-mentioned hardened welded portion, there is provided a long-life spot peeling cutter employing a cemented carbide as a blade.

[Means for Solving the Problems] In order to achieve the above object, the present invention combines two types of cutting sharing and blade steel types to form an outer ring portion having a spot welding area with a cemented carbide cutting edge. It is characterized by an effective division of roles, in which the inner core is left to tough high-speed steel.

[0005] [Embodiment of the present invention] [0005] The present invention is a cutter capable of cutting the area of one spot welded portion with two cutting area sharing, two steel types and different shaped blades, and peeling off a large number of spot weld hardened portions. It is.

Embodiment Hereinafter, the spot peeling cutter of the present invention will be described in detail based on an embodiment. FIG. 1 is a perspective view showing the spot peeling cutter of the present invention. FIG. 2 is a sectional view. Referring to FIG. 1 and FIG. 2, the spot peeling cutter is roughly adjusted with a main body 2 of a cylindrical tool and a center drill 3, a screw 4 for stopping and stopping the drill and a projection adjusting rod 5 for the center drill. The screw 6, the outer ring portion cutting carbide blade 7, and the protrusion 8 are formed.

When the center drill 3 first starts drilling at a fixed position for spot welding peeling, and when the centering is secured, when the drill 3 is drilled up to the protruding amount 8, the cutting edge 7 of the outer ring part cutting starts drilling, and Drill the upper sheet metal and stop drilling when the tip hits the lower sheet metal. As a result, the upper sheet metal and the lower sheet metal that have been spot-welded repeatedly are separated from each other, and the role of the spot peeling is completed.

In the adjustment of the protruding amount of the cutting edge of the inner core portion and the outer ring portion, when the depth of the welding recess at the spot weld is large, the protruding amount of the center drill is small, so that the shoulder of the drill has the concave portion. In some cases, the centering property could not be ensured due to the contact with the edge, so the structure was such that the protrusion amount 8 could be adjusted.

FIG. 3 shows a conventional spot peeling drill A and a spot peeling cutter B. Each of them has two blades and the cutting edge portion is made of high-speed steel of the same material. Some have a coated surface to increase hardness.

[Effects of the Invention] As can be understood from the above description of the embodiments, the present invention has the structure described in the claims, so that the welding operation for the peeling operation at the overlapped portion of the spot welding is performed. The hardened part can now cut a large number of outer ring parts with carbide cutting blades. The high-speed steel that can cope with slippage or misalignment of the position is used for cutting the inner core for final positioning.

[Brief description of the drawings]

FIG. 1 is a perspective view of a spot peeling cutter of the present invention.

FIG. 2 is a sectional view of the spot peeling cutter of the present invention.

FIG. 3 shows a conventional spot peeling drill and a spot peeling cutter.

[Explanation of symbols]

 1, spot peeling cutter 2, blade body 3, center drill 5, adjustment rod 7, carbide blade

Claims (2)

[Utility model registration claims] The present invention relates to an operation for peeling a spot welded portion of a laminated sheet metal, wherein a circular shape of the welded portion is divided into two, an outer ring portion cutting and an inner core portion cutting, and each of the circular shapes is simultaneously cut with a different blade. The cutting edge is cut using an annular perforated cutting tool provided with a cutting edge on the outer peripheral surface of the cylindrical body, and the cutting tool that cuts off the inner core part left behind by cutting is performed using a center drill. A spot peeling cutter characterized in that a circular welded part is cut with a tool combining blades. 2. The method according to claim 1, wherein the circular drilling tool for cutting the outer ring portion is provided with a carbide cutting tool capable of coping with a high peripheral speed, and the peripheral speed of the inner core portion is zero or a low peripheral speed range. The two are combined using a high-speed steel center drill that has toughness and can secure centripetality with the sharpness of the tip.The positional relationship of the combination is the cutting of the center drill inside the cutting edge of the outer annular drilling tool. The tip of the blade is 0,7mm ~ 1,2
A spot peeling cutter characterized by protruding mm and starting drilling from the center drill first.