Metal saw blade with chip removal grooves

Abstract

The utility model relates to the technical field of cutting tools, and discloses a metal saw blade with chip removal grooves, which comprises a main rack, first saw teeth are arranged at the bottom of the main rack, and a first groove is formed in the side wall of the main rack; the seam expanding assembly comprises a second auxiliary rack and a third auxiliary rack, the second auxiliary rack and the third auxiliary rack are fixedly installed on the two sides of the main rack correspondingly, a plurality of second sawteeth are arranged at the bottom of the second auxiliary rack, and a plurality of third sawteeth are arranged at the bottom of the third auxiliary rack; according to the scheme, a shallow groove is cut in metal through the first sawteeth which are small in interval and densely distributed, the second auxiliary rack which is high widens the groove, and when the main rack is pulled back, the third auxiliary rack cuts and widens the groove again. The probability that clamping stagnation of the saw blade and a metal piece affects saw cutting efficiency and service life of the saw blade can be greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and in particular to a metal saw blade with chip removal grooves. Background Technology

[0002] Metal band saw blades are mainly made of two metal materials welded together: high-speed steel for the tooth tips and spring steel for the tooth backs. They are primarily used for metal sawing processes.

[0003] A search revealed a 1 / 1.25T variable tooth amount flat tooth groove bimetallic band saw blade (publication number: CN109807394B), comprising a rack body with a plurality of saw teeth distributed on the rack body. The saw teeth are arranged in groups along the length of the rack body, and each group of saw teeth consists of five sub-teeth, namely a middle guide tooth, left sub-teeth I, right sub-teeth I, left sub-teeth II, and right sub-teeth II. The tooth amount of each group of saw teeth is a variable tooth amount, wherein the tooth amount F1 of left sub-teeth I is 0.45-0.50mm, the tooth amount F2 of left sub-teeth II is 0.65-0.70mm, the tooth amount F3 of right sub-teeth I is 0.65-0.70mm, and the tooth amount F4 of right sub-teeth II is 0.45-0.50mm. The tooth height B of each group of saw teeth is 3.0-3.2mm, and the tooth groove of each group of saw teeth is a flat tooth groove.

[0004] In existing technologies, saw blades are integral and mainly cut metal workpieces through saw teeth. During the cutting process, especially in the stage where the saw blade contacts the metal workpiece and cuts a groove, the denser the distribution of saw teeth, the better for the equipment and cutting accuracy, because it is convenient to position the saw blade. In the middle stage of cutting, widely distributed saw teeth can quickly and efficiently cut off the metal workpiece. Therefore, it is necessary to have two types of saw teeth distributed on the same saw blade.

[0005] Therefore, we propose a metal saw blade with chip removal grooves. Utility Model Content

[0006] The present invention mainly solves the technical problem that the distribution of saw teeth is difficult to adjust according to the cutting stage, and provides a metal saw blade with chip removal grooves.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a metal saw blade with chip removal grooves, comprising:

[0008] The main rack has a first serration at its bottom and a first groove on its side wall.

[0009] A slit widening assembly is disposed on both sides of the main rack to deepen the cut. The slit widening assembly includes a second rack and a third rack, which are fixedly installed on both sides of the main rack. The bottom of the second rack is provided with a plurality of second serrations, and the bottom of the third rack is provided with a plurality of third serrations. The third serrations are distributed in the opposite direction to the second serrations.

[0010] In a preferred embodiment of this utility model, the second and third auxiliary racks form a rectangular strip structure with the same length as the main rack, and the height of the third auxiliary rack is less than the height of the second auxiliary rack.

[0011] In a preferred embodiment of this utility model, both the second saw tooth and the first saw tooth are hook-shaped structures that are bent toward the length extension direction of the main rack, and the distribution interval of the second saw tooth is greater than the interval of the first saw tooth.

[0012] In a preferred embodiment of this utility model, the third saw tooth is a hook body that bends in the opposite direction to the second saw tooth, and the distribution interval of the third saw tooth is greater than the distribution interval of the second saw tooth.

[0013] In a preferred embodiment of this utility model, the tops of the main rack, the second rack, and the third rack are flush, and mounting holes for mutual alignment are provided at the corners of the main rack, the second rack, and the third rack.

[0014] In a preferred embodiment of this utility model, a first groove is provided on both sides of the main rack, and the first groove is trapezoidal.

[0015] In a preferred embodiment of this utility model, a plurality of second grooves are formed on the side of the second auxiliary rack away from the main rack, and a plurality of third grooves are formed on the side of the third auxiliary rack away from the main rack.

[0016] This invention provides a metal saw blade with chip removal grooves. It has the following advantages:

[0017] 1. This metal saw blade with chip removal grooves features a second and third set of teeth of unequal height on both sides of the main toothed blade. These second and third sets of teeth can be integrally formed. When sawing metal parts, the first set of teeth, with smaller spacing and a denser distribution, cuts a shallow groove. As the main toothed blade reciprocates, the higher second set of teeth widens the groove. When the main toothed blade retracts, the third set of teeth cuts and widens the groove again. Compared to a one-piece saw blade, this design, based on the reciprocating motion of the saw blade, first cuts a shallow groove and then cuts the metal part multiple times until it breaks. This significantly reduces the probability of the saw blade jamming with the metal part, affecting cutting efficiency and saw blade life, while ensuring cutting accuracy.

[0018] 2. This is a metal saw blade with chip removal grooves. The chip removal grooves are non-isosceles trapezoids, and the depth of the chip removal grooves can be adjusted according to the spacing between the first, second, and third saw teeth. For example, if the first saw teeth are more densely distributed, the cut chips are smaller, and the corresponding first groove can be shallower. This structure ensures that the chips slide out along the guide surface and prevents the chips from getting stuck through the steep chip-blocking surface. By setting the chip removal grooves, the chips generated by cutting in the grooves can be discharged in time with the reciprocating motion of the main rack, avoiding sticking. Secondly, it can also increase the heat dissipation effect of the saw blade, reduce the probability of material sticking, control the cutting resistance, and ensure that the cutting effect of the saw blade is not affected by the chips. Attached Figure Description

[0019] Figure 1 This is a perspective view of the entire utility model;

[0020] Figure 2 This is a perspective view of the main rack of this utility model;

[0021] Figure 3 The second rack of this utility model; perspective view;

[0022] Figure 4 This is a perspective view of the third rack of this utility model;

[0023] Figure 5 This is a partial sectional view of the main rack and the first auxiliary rack of this utility model.

[0024] Legend: 10. Main rack; 11. First sawtooth; 12. First groove; 20. Second rack; 21. Second sawtooth; 22. Second groove; 30. Third rack; 31. Third sawtooth; 32. Third groove. Detailed Implementation

[0025] A metal saw blade with chip removal grooves, such as Figure 1 As shown, it includes:

[0026] The main rack 10 has a first serration 11 at its bottom and a first groove 12 on its side wall.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the slit widening assembly is disposed on both sides of the main rack 10 to deepen the cut. The slit widening assembly includes a second auxiliary rack 20 and a third auxiliary rack 30, which are respectively fixedly installed on both sides of the main rack 10. The bottom of the second auxiliary rack 20 is provided with a plurality of second serrations 21, and the bottom of the third auxiliary rack 30 is provided with a plurality of third serrations 31. The third serrations 31 are distributed in the opposite direction to the second serrations 21. The second auxiliary rack 20 and the third auxiliary rack 30 form a rectangular strip structure of the same length as the main rack 10. The height of the third auxiliary rack 30 is less than the height of the second auxiliary rack 20. The second serrations 21 and the first serrations 11 are both hook-shaped structures that bend toward the length extension direction of the main rack 10. The distribution interval of the second serrations 21 is greater than the interval of the first serrations 11. The third serrations 31 are hooks that bend toward the second serrations 21. The distribution interval of the third serrations 31 is greater than the distribution interval of the second serrations 21.

[0028] In this design, a second set of toothed racks 20 and a third set of toothed racks 30 with different heights are set on both sides of the main toothed rack 10. The second set of toothed racks 20 and the third set of toothed racks 30 can be made by integral molding or by welding. When cutting metal parts, the first saw teeth 11 with smaller spacing and denser distribution cut a shallow groove in the metal. As the main toothed rack 10 reciprocates, the second set of toothed racks 20 with higher height widens the groove. When the main toothed rack 10 is pulled back, the third set of toothed racks 30 cuts and widens the groove again. Compared with an integral saw blade, this design cuts the metal parts multiple times until they are broken, based on the characteristics of the reciprocating motion of the saw blade. This can significantly reduce the probability of the saw blade jamming with the metal parts, affecting the cutting efficiency and the life of the saw blade.

[0029] like Figure 1 As shown, the tops of the main rack 10, the second rack 20, and the third rack 30 are flush. The corners of the main rack 10, the second rack 20, and the third rack 30 are all provided with mounting holes that are aligned with each other. The mounting holes are used to install and fix the sawing equipment. They will not be described in detail here. The saw blade can be locked and fixed by bolts.

[0030] like Figure 4 and Figure 5 As shown, the main rack 10 has a first groove 12 on both sides, the first groove 12 is trapezoidal, the second rack 20 has a number of second grooves 22 on the side away from the main rack 10, and the third rack 30 has a number of third grooves 32 on the side away from the main rack 10.

[0031] In this design, the first groove 12, the second groove 22, and the third groove 32 can be of the same shape and are collectively referred to as chip removal grooves. The chip removal grooves are non-isosceles trapezoids, and the depth of the chip removal grooves can be adjusted according to the spacing between the first saw teeth 11, the second saw teeth 21, and the third saw teeth 31. For example, if the first saw teeth 11 are more densely distributed, the cut chips will be smaller, and the corresponding first groove 12 can be shallower. One side of the chip removal groove is a 55°±2° guide slope (A side), and the other side is a 70°±2° chip blocking slope. (B side) The groove depth H and width W satisfy H / W=1.2-1.5 (preferably 1.3), and the width of the upper opening is 2.5-3.0 times the bottom width. This structure ensures that the chips slide out along the guide surface and prevents the chips from getting stuck by the steep chip-blocking surface. By setting the chip discharge groove, the chips generated by cutting in the groove can be discharged in time with the reciprocating motion of the main rack 10, avoiding sticking. Secondly, it can also increase the heat dissipation effect of the saw blade, reduce the probability of sticking, and ensure that the cutting effect of the saw blade will not be affected by the chips and thus be reduced.

[0032] The working principle of this utility model is as follows: By setting a second set of toothed racks 20 and a third set of toothed racks 30 with different heights on both sides of the main toothed rack 10, the second set of toothed racks 20 and the third set of toothed racks 30 can be made in one piece. When cutting metal parts, the first saw teeth 11 with smaller spacing and denser distribution cut a shallow groove in the metal. As the main toothed rack 10 reciprocates, the second set of toothed racks 20 with higher height widens the groove. When the main toothed rack 10 is pulled back, the third set of toothed racks 30 cuts and widens the groove again. The metal parts are cut and sawed multiple times until they are broken. The chip removal groove can discharge the chips generated in the groove in time with the reciprocating motion of the main toothed rack 10, avoiding sticking. Secondly, it can also increase the heat dissipation of the saw blade.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A metal saw blade with chip removal grooves, characterized in that, include: The main rack (10) has a first serration (11) at its bottom and a first groove (12) on its side wall. The slit widening assembly is set on both sides of the main rack (10) to deepen the cut. The slit widening assembly includes a second rack (20) and a third rack (30). The second rack (20) and the third rack (30) are respectively fixedly installed on both sides of the main rack (10). The bottom of the second rack (20) is provided with a plurality of second serrations (21), and the bottom of the third rack (30) is provided with a plurality of third serrations (31). The third serrations (31) are distributed in the opposite direction to the second serrations (21).

2. The metal saw blade with chip removal groove according to claim 1, characterized in that: The second rack (20) and the third rack (30) form a rectangular strip structure of the same length as the main rack (10), and the height of the third rack (30) is less than the height of the second rack (20).

3. The metal saw blade with chip removal groove according to claim 1, characterized in that: Both the second saw tooth (21) and the first saw tooth (11) are hook-shaped structures that bend toward the length extension direction of the main rack (10), and the distribution interval of the second saw tooth (21) is greater than the interval of the first saw tooth (11).

4. The metal saw blade with chip removal groove according to claim 1, characterized in that: The third saw tooth (31) is a hook body that bends in the opposite direction to the second saw tooth (21), and the distribution interval of the third saw tooth (31) is greater than the distribution interval of the second saw tooth (21).

5. The metal saw blade with chip removal groove according to claim 1, characterized in that: The tops of the main rack (10), the second rack (20), and the third rack (30) are flush, and mounting holes for mutual alignment are provided at the corners of the main rack (10), the second rack (20), and the third rack (30).

6. The metal saw blade with chip removal groove according to claim 1, characterized in that: The main rack (10) has a first groove (12) on both sides, and the first groove (12) is trapezoidal.

7. The metal saw blade with chip removal groove according to claim 1, characterized in that: The second auxiliary rack (20) has several second grooves (22) on the side away from the main rack (10), and the third auxiliary rack (30) has several third grooves (32) on the side away from the main rack (10).

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