CN200998874Y - Carpenter flat drill - Google Patents

Abstract

The utility model discloses a woodworker flat drill, which is composed of a drill pipe and a tabular drilling section, a drill tip is distributed on the drilling section, an arc groove in reverse direction is provided at a front cutter edge at the two sides of the drilling section; the arc groove comprises an abeam arc groove and a drill tip arc groove. The utility model provides a flat drill with sharp cutter edge with good cutting effect.

Description

A kind of Woodworking flat drill

Technical field

The utility model relates to carpenter's cutting element, specifically is a kind of Woodworking flat drill.

Background technology

The Woodworking flat drill of people's use at present all is made up of the drilling section of drilling rod and flat, be distributed with apex point on the drilling section, on two side knife surfaces of drilling section, dug rightabout cutting groove, as shown in Figure 1, the cross section of described cutting groove be one trapezoidal, this Woodworking flat drill utilizes straight line to become the angle principle, its cutting anterior angle size can not be done very greatly, otherwise edge of a knife insufficient strength is easily burst apart, because the anterior angle Angular Dimension is less, so adopt the edge of a knife of Woodworking flat drill of this cutting groove sharp inadequately, cutting angle is difficult to break through more than-5 ° during operation, and cutting effect is bad.

The utility model content

For overcoming the deficiency of above-mentioned technology, the utility model provides a kind of Woodworking flat drill, makes the edge of a knife of chit drill sharper, and cutting effect is better.

For achieving the above object, adopt following technical scheme:

A kind of Woodworking flat drill is made up of the drilling section of drilling rod and flat, is distributed with apex point on the drilling section, and it is characterized in that: the edge of a knife is provided with rightabout deep-slotted chip breaker before the both sides of drilling section; Described deep-slotted chip breaker comprises horizontal deep-slotted chip breaker and apex point deep-slotted chip breaker.

The utility model is processed with the opposite deep-slotted chip breaker of direction on the edge of a knife of drilling section both sides, the cutting groove that deep-slotted chip breaker is present relatively, it is on the bigger situation of cutting anterior angle, can also guarantee the intensity of the edge of a knife, solved the sharp inadequately shortcoming of the present Woodworking flat drill edge of a knife well, had the advantages that the edge of a knife is sharp, cutting effect is good.

Description of drawings

The profile of Fig. 1, present Woodworking flat drill edge of a knife cutting groove;

Fig. 2, structural representation of the present utility model;

Fig. 3, the horizontal deep-slotted chip breaker A-A of the utility model profile;

Fig. 4, the utility model apex point deep-slotted chip breaker B-B profile;

Fig. 5, the utility model deep-slotted chip breaker forming principle figure.

The specific embodiment

Shown in Fig. 2-4, a kind of Woodworking flat drill is made up of the drilling section 2 of drilling rod 1 and flat, is distributed with apex point 21 on the drilling section 2, and the edge of a knife is provided with rightabout deep-slotted chip breaker before the both sides of drilling section 2.The deep-slotted chip breaker of each side is divided into 23 two sections of horizontal deep-slotted chip breaker 22 and apex point deep-slotted chip breakers.

As shown in Figure 5, process the edge of a knife, utilize the principle of cutting a=90 °-arccos of anterior angle (R/N) with shaping dies, from its shaping principle as can be known, change N, R and can obtain different a angles, a angle is big more, the edge of a knife can be sharp more, for improving a angle, can reduce R and increase the N distance.

The utility model is processed with the opposite deep-slotted chip breaker of direction on the edge of a knife of drilling section both sides, the cutting groove that deep-slotted chip breaker is present relatively, it is on the bigger situation of cutting anterior angle, can also guarantee the intensity of the edge of a knife, solved the sharp inadequately shortcoming of the present Woodworking flat drill edge of a knife well, had the advantages that the edge of a knife is sharp, cutting effect is good.

Claims (1)

1, a kind of Woodworking flat drill is made up of the drilling section of drilling rod and flat, is distributed with apex point on the drilling section, and it is characterized in that: the edge of a knife is provided with rightabout deep-slotted chip breaker before the both sides of drilling section; Described deep-slotted chip breaker is divided into horizontal deep-slotted chip breaker and apex point deep-slotted chip breaker.

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