JP3148287U - Tip saw - Google Patents

Abstract

The present invention relates to a chip saw for cutting relatively soft objects such as paper and corrugated paper, and a chip saw for reducing cutting resistance by reducing chips and paper dust generated when cutting the corrugated paper. provide. In a tip saw, a saw blade tip whose blade edge is tilted forward in the rotational direction is brazed to a tip seat of a circular base metal, and a mountain-shaped head ridge line and a head chamfered surface are formed on the head, and a blade tip is formed on the front surface A saw blade tip having a sharp cutting edge with a bowl shape having a sorting blade surface centered on an edge is provided. [Selection] Figure 1

Description

  The present invention relates to a chip saw that cuts relatively soft objects such as paper and corrugated paper, and aims to reduce cutting resistance by reducing chips and paper dust generated when cutting the corrugated paper. Related to the tip saw.

  There is a demand for efficient cutting of relatively soft objects such as paper and corrugated paper, and in order to respond to this, paper or corrugated paper is experimentally cut with a general wood cutting tip saw. As a result, a large amount of chips and paper dust accompanying cutting are generated and attached to the cut object, and the chip is covered like a hat on the blade edge of the saw tooth, and as a result, it receives a cutting action through the chip. As a result, there is a problem in that the cutting object tends to be shredded without being cut by the saw blade, the cutting surface of the cutting object becomes rough and rough, and the cutting resistance increases. .

  In order to solve the problem that the cutting surface of the cut object becomes rough and the problem that the cutting force increases, when cutting a relatively soft object such as paper or cardboard with a tip saw, cutting is performed if the saw blade is tilted forward in the rotation direction. Although the force of the tip saw works in the direction of drawing in, the cutting resistance can be reduced and the cutting can be pushed lightly, but on the other hand, the cutting experiment may cause problems that the cutting edge of the saw blade is covered with cutting chips and paper dust Was found out.

  The most important aspect of the present invention is that the blade edge is tilted forward by 3 to 35 degrees in the direction of rotation in the tip saw, and the saw blade tip having the sharp edge of the hook shape is brazed to the tip seat of the circular base metal. In order to realize this, first, the edge of the saw blade tip is formed on the tip seat in the rotational direction of the saw blade formed in the outer periphery of the circular base metal at intervals of 10 to 50 mm. In a tip saw brazed to a tilting posture forwardly tilted from 3 degrees to 35 degrees forward in the rotational direction from a state where the diameter of the saw blade is aligned with the diameter line, the cutting edge of the saw blade tip has a bowl shape and a sorting angle of 15 degrees It has a ridgeline blade surface of 120 degrees and a length of 3 to 15 mm and a sharp edge with a tip angle of 35 to 85 degrees at its tip, and the saw blade tip head is ridgeline from 45 to 150 degrees Chamfered in a chevron shape so that the width is circular A symmetric hard saw blade tip with a blade width 0.1 to 1.6 mm wider than the width of the gold is brazed to the tip of the circular base metal. There is an advantage of preventing chips and paper dust from being cut.

  The chip saw of the present invention has the above-described solution and the specific advantages associated therewith, and suppresses almost all chips and paper dust generated when cutting relatively soft objects such as paper and corrugated paper, There is an advantage that the cutting object can be lightly pressed by reducing the cutting resistance without covering the cutting edge of the saw-tooth with the chips and paper powder accompanying the cutting.

  A chip seat having 30 saw teeth 3 formed at intervals of 35 mm by laser cutting on the outer circumference of a circular base metal 2 having a width of 1.4 mm and a diameter of 305 mm, and inclined forward by 15 degrees from the diameter line in the rotation direction F. 8 is processed. A cemented carbide tip 4 mm wide, 5 mm long and 1.8 mm wide is brazed to the chip seat 8, and the head ridge line 9 first escapes 15 degrees backward in the rotational direction F from the circular base metal tangent L3. The head chamfered surface 10 having a chamfered angle α of 90 degrees is formed by machining the head chamfered surface 10 with the head angle chamfered by 45 degrees symmetrically by cutting to the dent angle S1. Thereafter, the front surface of the cemented carbide tip is tilted 75 degrees symmetrically to form a bowl-shaped saw blade tip having a cutting edge 8 having a cutting angle of β30 degrees, a cutting edge 7 and a cutting edge 6 having a tip angle γ60 degrees.

  When the thickness of the cut object is 100 mm, the diameter of the circular base metal 2 is 305 mm and the width T of the circular base metal 2 is 1.4 mm. This is set in a timely manner according to the conditions of the cut object.

  As shown in FIG. 1, saw blades 3 are formed on the outer periphery of the circular base metal 2 at intervals of 32 mm using a laser cutting machine, and tilted forward by 15 degrees from the circular base metal diameter line L1 in front of the tip saw rotation direction F. The chip seat 4 is provided in the state. If this interval is less than 10 mm, the number of carbide tips increases and the cost is increased, and if it is greater than 50 mm, the surface of the cut object during cutting becomes rough. In addition, since the angle of the tip seat 4 becomes the tip edge forward tilt angle S1 of the saw blade tip 5 after machining the carbide tip, the cutting object is pushed back unless it is tilted 3 degrees or more forward in the tip saw rotation direction F with respect to the circular base metal diameter line L1. Since the force acts in the direction, the cutting resistance increases, and when it is tilted by 35 degrees or more, the cut object is pulled and the cut surface of the cut object becomes rough. These are set in a timely manner within a specified range according to the cutting conditions.

  As shown in FIGS. 2 and 3, a cemented carbide tip having a width of 4 mm, a length of 5 mm, and a width of 1.8 mm is brazed to the tip seat 4 of the saw blade 3 to obtain a saw blade tip 5. The length of the cemented carbide tip is the length of the cutting edge 8 when the saw blade tip 5 is formed. If the length is 3 mm or less, the cut object is affected by the circular base metal 2 when the cutting depth is large. Further, if the length is longer than 15 mm, the price of the cemented carbide chip increases, and the cost of the chip saw 1 increases. Since the width of the cemented carbide tip shown in FIG. 4 is the width W of the saw blade tip, in order to prevent friction between the workpiece and the circular base metal 2, the width is 0.2 mm wider than the thickness of the circular base metal 2. Is suitable. When the difference between the width T of the circular base metal and the width W of the saw blade tip is 0.1 mm or less, the friction of the circular base metal 2 is greatly ground and bent. The width that spreads the workpiece increases and the cutting resistance increases. The size of the cemented carbide tip is set in a timely manner within a specified range according to cutting conditions.

  The saw blade tip 5 of the tip seat 4 shown in FIGS. 1 and 6 is shaved from the circular base metal tangent line L3 to the back of the tip saw rotation direction F so that the head edge ridge line S2 is 15 degrees. When the head edge ridge line S2 is 2 degrees or less, the head ridge line 9 of the saw blade tip 5 comes into contact with the cutting object during cutting and the resistance increases, and when it exceeds 20 degrees, the tip angle γ decreases and the cutting edge 6 decreases. Insufficient strength to cause defects. These are set in a timely manner within a specified range according to the cutting conditions.

  Next, as shown in FIG. 4, the head chamfered surface 10 inclined by 45 degrees symmetrically with respect to the head of the saw blade tip 5 cut at 15 degrees is machined, and the head chamfering angle α is 90 degrees. A mountain-shaped head ridge line 9 is formed. At this time, when the head chamfering angle α is 150 ° or more, the contact between the cutting object and the blade surface 7 of the saw blade tip 5 becomes large and the cutting surface becomes rough, and when the head chamfering angle α is 45 ° or less, the strength of the cutting edge 6 is insufficient. Wake up. These are set in a timely manner within a specified range according to the cutting conditions.

  Next, as shown in FIG. 5, the front surface of the saw blade rotation direction F of the saw blade tip 5 is tilted 75 degrees symmetrically left and right, and the knife-like double blade surface 7 and the blade edge 8 are formed so that the cutting angle β is 30 degrees. . When the sorting angle β is 120 degrees or more, the cutting resistance at the time of cutting increases. These are set in a timely manner within a specified range according to the cutting conditions.

  The tip angle γ is an angle obtained by subtracting the head edge ridge angle S2 and the blade edge forward tilt angle S1 from 180 degrees.

When the tip saw 1 is used to cut a relatively soft object such as paper or corrugated cardboard with the tip saw, the cutting edge 6 first pierces the cut object. After that, since the blade edge 8 is tilted forward in the tip saw rotation direction F, the cutting is proceeded so as to draw the workpiece. Then, the cut object is pushed and spread by the double-edged surface 7. Since the head of the saw blade tip 5 is chamfered at this time, the contact area between the two blade surfaces 7 of the saw blade tip 5 and the cut object is narrowed, and the resistance can be minimized, so that the cutting force is reduced and the surface of the cut object is also smooth. Finishing, almost no chips and paper dust are generated, so good cutting work can be done.

Partial oblique view of the tip saw Enlarged oblique view of saw blade tip Enlarged oblique view of saw blade tip Front view of saw blade insert Top view of saw blade tip Side view of saw blade tip

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tip saw 2 Circular base metal 3 Saw tooth 4 Tip seat 5 Saw blade tip 6 Cutting edge 7 Blade surface 8 Cutting edge 9 Head ridge line 10 Head chamfering surface F Tip saw rotation direction T Circular base metal width W Saw blade chip width L1 Circular base metal diameter line L2 Edge edge line L3 Circular base metal tangent S1 Tip edge forward tilt angle S2 Head edge chamfer angle α Head chamfer angle β Sorting angle γ Tip angle

Claims (1)

  A symmetrical hard material having a blade width 0.1 mm to 1.6 mm wider than the width of the circular base metal on the tip seat provided on the front side in the rotation direction of the plurality of saw teeth formed on the outer periphery of the circular base metal The saw blade tip is a circular saw tip saw that is brazed at a forward angle of 3 to 35 degrees in the rotation direction with respect to the diameter line, and the cutting edge of the saw blade tip has a hook shape and a sorting angle. Has a ridge line blade surface of 15 to 120 degrees and a length of 3 to 15 mm, and a sharp cutting edge with a tip angle of 35 to 85 degrees at the tip, and the saw blade tip head rotates in the direction of tangent A saw with a saw blade tip chamfered in a chevron of 45 to 150 degrees in a ridge shape with a clearance angle of 2 to 30 degrees on the rear side.

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