Limiting tooth alloy saw blade

Abstract

The limiting tooth alloy saw blade comprises a base body and a tool bit, and a plurality of chip grooves are formed in the circumference of the base body; the tool bit is brazed on one side of the chip groove, and limiting teeth are arranged on the base body on one side, far away from the tool bit, of the chip groove; the radial distance between the outer circular top surface of the limiting tooth and the tool nose of the tool bit is h1, and h1 is larger than or equal to 0.5 mm and smaller than or equal to 1.5 mm; cutting teeth are arranged on the base body on one side of the chip groove welding tool bit; the limiting teeth and the cutting teeth are connected through the dividing grooves. The cutting teeth adopt arc back teeth, and the limiting teeth adopt reverse arc backs with arcs in the front; the bottom of the dividing groove is of an arc structure, and the cutting teeth and the limiting teeth are connected together through arcs. The saw blade has the beneficial effects that the independent limiting teeth are arranged, the effect of the limiting teeth is conveniently achieved, the limiting size is more convenient to adjust, and meanwhile machining and manufacturing of the saw blade are facilitated; the cutting teeth are arc back teeth, so that the strength of the tool bit tooth holder is enhanced; and the limiting teeth adopt reverse arc backs, so that the phenomenon that the limiting teeth are stuck when playing a limiting role is prevented.

Description

Technical Field

[0001] This application relates to the field of alloy saw blade technology, and more specifically, to a limiting tooth alloy saw blade. Background Technology

[0002] With the development of carbide saw blade technology, its application in cutting metals and their alloys has been rapidly popularized and promoted. Previously, the cutting of metals, especially medium-to-high hardness metals, was primarily handled by diamond tools. The principle behind this was that tiny diamond particles ground the metal, dividing the material. In recent years, with the improvement of carbide performance and the development of carbide saw blade technology, carbide saw blades have become capable of cutting medium-to-low hardness metals, especially since their cutting efficiency is several times or even tens of times that of diamond saw blades, leading to their rapid widespread adoption.

[0003] In the cutting of metal with carbide saw blades, due to the high hardness of metals, tooth chipping and breakage are frequent problems, accounting for more than 50% of the reasons for the scrapping of carbide saw blades. The main reason for tooth chipping and breakage is that the cutting motion of a circular saw blade is very complex, especially in handheld cutting, where controlling the feed rate of a single tooth is very difficult. When the feed rate of a single tooth is too large, the cutting resistance suddenly increases, creating a huge impact force on the saw blade teeth (cutting head), leading to the breakage of the cutting head.

[0004] To reduce the risk of tooth breakage and chipping and to control the feed per tooth, locating tooth saw blades were developed, which have played a role in reducing tooth breakage and chipping. However, existing locating teeth simply have an outward protrusion on the back of each tooth (i.e., the base of the cutter head's rear face). After grinding, they are not adjusted according to the actual height of the cutter head, resulting in a large allowable height tolerance (±2mm according to GB / T 14388—2010). Furthermore, the distance between the locating tooth and the tip of each cutter head is too large. This is supposed to ensure smooth chip removal, but it unnecessarily increases the size of the chip removal groove. Due to these two reasons, the locating teeth do not effectively limit the chip flow and need to be addressed. In the existing patent, application number 201720485450.3 is entitled "A Low-Stress Saw Blade," which includes a saw blade body, tooth backs, and a cutting head fixed to the tooth backs; the tooth backs are provided with limiting protrusions; the saw blade body is provided with air holes, and the center of the saw blade body is a positioning hole; furthermore, stress relief grooves are provided on the tooth backs, and the stress relief grooves are located between the cutting head and the limiting protrusions; the limiting protrusions in this application are located on the rear side of the cutting head and cannot play a limiting role, so improvements are needed. Utility Model Content

[0005] The purpose of this application is to address the shortcomings of existing technologies by providing a limit tooth alloy saw blade. By setting limit teeth, the feed amount of a single tooth can be controlled, thereby reducing the risk of tooth breakage and chipping during saw blade cutting and extending the service life of the saw blade.

[0006] The technical solution of this application is,

[0007] A limiting tooth alloy saw blade includes a base and a cutting head. The base has a plurality of chip removal grooves on its circumference. The cutting head is brazed to one side of the chip removal grooves. Limiting teeth are provided on the base on the side of the chip removal grooves away from the cutting head. The radial distance between the outer top surface of the limiting teeth and the tip of the cutting head is h1, wherein h1 satisfies 0.5 mm ≤ h1 ≤ 1.5 mm.

[0008] Furthermore, the chip removal groove is welded to the base on one side of the cutter head, which is provided with cutting teeth; the limiting teeth and the cutting teeth are connected by a dividing groove.

[0009] Furthermore, the cutting teeth are arc-backed teeth, and the limiting teeth are reverse arc-backed teeth with the arc in front; the bottom of the dividing groove is an arc structure, and the arc connects the cutting teeth and the limiting teeth together.

[0010] Furthermore, the opening width of the chip removal groove is L1, where L1 ≥ 5 mm.

[0011] Furthermore, the included angle of the chip removal groove opening is α, where 10°≤α≤30°.

[0012] Furthermore, the circumferential length of the limiting tooth is L2, where 3 mm ≤ L2 ≤ 10 mm.

[0013] The beneficial effects of this application are:

[0014] 1. This application features independent limiting teeth, which makes it easier to utilize the function of the limiting teeth because the adjustment of the limiting size is more convenient, and it also facilitates the processing and manufacturing of the saw blade.

[0015] 2. The cutting teeth adopt arc-back teeth, which strengthens the strength of the cutter head tooth seat; the limiting teeth adopt reverse arc-back teeth, which prevent jamming when the limiting teeth play a limiting role due to the arc transition guide.

[0016] 3. The opening size of the chip removal groove is based on data derived from long-term R&D experience. It aims to minimize the distance between the limit switch and the tip of the cutter teeth while ensuring smooth chip removal.

[0017] 4. The setting of the circumferential length of the limiting tooth as L2 is to minimize the friction between the limiting tooth and the material being cut, while ensuring the strength of the limiting tooth.

[0018] 5. For the outer diameter grinding of the limiting teeth, an automatic grinding machine is preferred. The saw blade rotates intermittently along the center hole and retracts, and a cylindrical grinding wheel is used for grinding. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this application;

[0020] Figure 2 for Figure 1 Enlarged view of point I;

[0021] Figure 3 This is a partial three-dimensional structural schematic diagram of this application;

[0022] Figure 4 for Figure 2 Sectional view at CC;

[0023] Figure 5 for Figure 2 Sectional view at DD;

[0024] Legend:

[0025] 1-Base, 2-Cutter head, 3-Dividing groove, 4-Chip removal groove, 5-Cutting tooth, 6-Limiting tooth. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the description of the textual part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.

[0027] Example 1

[0028] Reference Figure 1-5 As shown, Figure 1 The arrow on the top indicates the direction of rotation of the saw blade during cutting. If it is not installed correctly on the power tool, it will lose its cutting function and is also prone to losing teeth.

[0029] A limiting tooth alloy saw blade includes a base 1 and a cutter head 2. The base 1 has a plurality of chip removal grooves 4 on its circumference; the cutter head 2 is brazed to one side of the chip removal grooves 4.

[0030] like Figure 1-2 As shown, a limiting tooth 6 is provided on the base 1 on the side of the chip removal groove 4 away from the cutter head 2. In order for the limiting tooth 6 to play a limiting role during cutting, the radial distance between the outer dome surface of the limiting tooth 6 and the tip of the cutter head 2 is h1, where h1 satisfies 0.5 mm ≤ h1 ≤ 1.5 mm. In actual research and development and production, h1 needs to be determined experimentally based on the specific conditions of the actual cutting object. If the radial distance is too large, the impact force on the cutter head 2 will be greater, and it will not play a limiting role. If it is too small, the sharpness of the cutter head 2 will be affected. Generally, 1 mm is preferred to balance life and sharpness.

[0031] like Figure 2 , Figure 3 As shown, the chip removal groove 4 is welded to the base 1 on one side of the cutter head 2, which is provided with cutting teeth 5; the limiting teeth 6 and the cutting teeth 5 are connected by the dividing groove 3.

[0032] like Figure 2 As shown, the cutting tooth 5 adopts an arc-back tooth, which can withstand the impact on the cutter head 2 and strengthen the strength of the cutter head tooth seat; the arc-back tooth refers to the tooth seat that the cutter head 2 is close to during welding, and the arc of the tooth seat is against the structure of the cutter head 2.

[0033] The limiting tooth 6 adopts a reverse arc back with the arc at the front; the bottom of the dividing groove 3 has an arc structure, and the arc connects the cutting tooth 5 and the limiting tooth 6 together. The limiting tooth 6 adopts a reverse arc back, and due to the transition guidance of the arc, it prevents jamming when the limiting tooth 6 plays a limiting role during cutting.

[0034] For the outer diameter grinding of the limiting tooth 6, an automatic grinding machine is preferred. The saw blade rotates intermittently along the center hole and retracts, and a cylindrical grinding wheel is used for grinding to ensure the dimensions of the limiting tooth 6.

[0035] Example 2

[0036] The difference between this embodiment and Embodiment 1 is that...

[0037] like Figure 2 As shown, the circumferential length of the limiting tooth 6 is L2, where 3 mm ≤ L2 ≤ 10 mm.

[0038] If the circumferential length L2 of the limiting tooth 6 along the circumference of the base 1 is too short, the strength of the limiting tooth 6 will be too low. If it is too long, the spacing of the cutter heads 2 will be too large, and there will be too few cutter heads 2, which will affect the cutting efficiency.

[0039] Example 3

[0040] The difference between this embodiment and Embodiment 1 is that...

[0041] like Figure 2 As shown, the opening of the chip removal groove 4 has a width of L1, where L1 ≥ 5 mm.

[0042] The included angle of the chip removal groove 4 opening is α, where 10°≤α≤30°. For general-purpose alloy saw blades used for cutting iron, the width L1 of the chip removal groove 4 is minimized while ensuring smooth chip removal, typically 5mm. The opening size of the chip removal groove 4 is based on data derived from long-term research and development experience. It aims to minimize the distance between the limiting tooth 6 and the tip of the cutting edge while ensuring smooth chip removal, thus reducing the impact force on the cutting edge. The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A limited-depth tooth alloy saw blade, comprising a base body (1) and a blade head (2), the base body (1) is provided with a plurality of chip grooves (4) on the circumference; the blade head (2) is brazed on one side of the chip groove (4), characterized in that: The chip removal groove (4) is provided with a limiting tooth (6) on the base (1) on the side away from the cutter head (2); the radial distance between the outer apex surface of the limiting tooth (6) and the tip of the cutter head (2) is h1, and h1 satisfies 0.5mm≤h1≤1.5mm.

2. A limited-depth toothed alloy saw blade according to claim 1, characterized in that, The chip removal groove (4) is provided with cutting teeth (5); the limiting teeth (6) and the cutting teeth (5) are connected by a dividing groove (3).

3. A limited-depth toothed alloy saw blade according to claim 2, characterized in that The cutting tooth (5) adopts an arc-back tooth, and the limiting tooth (6) adopts a reverse arc-back with the arc in front; The bottom of the dividing groove (3) is an arc structure, which connects the cutting tooth (5) and the limiting tooth (6).

4. A limited-depth toothed alloy saw blade according to claim 3, characterized in that, The opening width of the chip removal groove (4) is L1, L1≥5mm.

5. A limited-depth toothed alloy saw blade according to claim 4, characterized in that, The included angle of the opening of the chip removal groove (4) is α, 10°≤α≤30°.

6. A limited-depth toothed alloy saw blade according to claim 5, wherein, The circumferential length of the limiting tooth (6) is L2, 3mm≤L2≤10mm.

Images