Concrete napping machine blade

Abstract

The utility model discloses a concrete napping machine blade which comprises a base body and a cylindrical tool bit brazed on the base body, a plurality of tooth holders are arranged in the circumferential direction of the outer circle of the base body at intervals, blind holes are formed in the tooth holders, and the tool bit is installed in the blind holes; the radial height of the tool bit protruding out of the tooth holder is H1, and the H1 is larger than or equal to 0.1 mm and smaller than or equal to 0.5 mm; the minimum wrapping thickness of the base body on the tool bit in the axial direction is K1, K1 = 1 / 2 (delta-D3), delta is the thickness of the base body, and D3 is the outer diameter of the tool bit; k1 also needs to satisfy 1.5 mm < = K1 < = 2.5 mm; the depth between the bottom of the chip pocket and the top of the outer circle of the tooth holder of the base body is delta d, delta d = 1 / 2 (D2-D1), and delta d is more than or equal to 5mm and less than or equal to 10mm; the machining method has the beneficial effects that the welding strength between the tool bit and the base body is improved, and the cylindrical part of the tool bit is higher than the size of the base body so that the strength of the spherical teeth under the action of huge impact stress can be guaranteed.

Description

Technical Field

[0001] This application relates to the cutting tool industry, and more specifically, to a concrete roughening machine blade. Background Technology

[0002] Concrete roughening machine blades are used in municipal construction projects such as roads and bridges. Concrete roughening machine blades are a special tool for treating concrete surfaces, also known as roughening machine blades or concrete roughening teeth. They are commonly used for roughening concrete surfaces. The roughening machine uses the power generated by high-speed rotation to roughen the concrete surface by contacting the blade with the ground.

[0003] The purpose of roughening concrete pavement is to increase the friction between the pavement and tires by increasing the roughness of the surface, reducing vehicle slippage under wet conditions, and improving driving safety. On the other hand, it also enhances adhesion. In highway construction, there are situations where a new pavement layer needs to be laid on top of the existing one. Roughening can improve the adhesion between the old and new pavements, ensuring that the newly laid asphalt layer adheres firmly to the old surface. Concrete roughening machines are undoubtedly the preferred choice because they can greatly reduce the labor intensity of construction and improve work efficiency. However, roughening machine blades are used in large quantities, resulting in high costs. Because the lifespan of roughening machine blades is relatively short, more than half of the blades fail not due to wear, but mainly due to the cracking and detachment of the carbide cutting edge. Therefore, improving the connection strength of the cutting edges becomes a key technical problem to be solved. Utility Model Content

[0004] The purpose of this application is to address the shortcomings of the existing technology by providing a concrete texturing machine blade that improves the connection strength between the blade head and the substrate, and prevents the carbide blade head from cracking and coming off.

[0005] The technical solution of this application is,

[0006] A concrete texturing machine blade includes a base and a cylindrical blade head brazed onto the base. The base has a plurality of tooth seats spaced apart along its outer circumference, and the tooth seats have blind holes. The blade head is installed in the blind holes. The radial height of the blade head protruding from the tooth seats is H1, and H1 satisfies the condition that 0.1 mm ≤ H1 ≤ 0.5 mm.

[0007] Furthermore, the cutting head is provided with a chamfer for guiding the blind hole.

[0008] Furthermore, the tooth holders are evenly distributed along the outer circle of the base 1, and adjacent tooth holders are transitioned by concave arc-shaped chip grooves.

[0009] Furthermore, the minimum axial enveloping thickness of the substrate on the cutting head is K1, K1=1 / 2(δ-D3), where δ is the thickness of the substrate and D3 is the outer diameter of the cutting head; K1 also needs to satisfy 1.5 mm≤K1≤2.5 mm.

[0010] Furthermore, the depth between the bottom of the chip groove and the outer circle of the tooth seat of the base is Δd, Δd=1 / 2(D2-D1) and 5 mm≤Δd≤10 mm, where D1 is the diameter of the bottom of the chip groove on the base 1; and D2 is the maximum outer diameter of the tooth seat of the base.

[0011] Furthermore, the length-to-diameter ratio of the cutter head is K, where 1 ≤ K ≤ 2;

[0012] Furthermore, the number of cutter heads is determined by the circumferential arc distance L between two adjacent cutter heads, where 20 mm ≤ L ≤ 35 mm.

[0013] The beneficial effects of this application are:

[0014] 1. By setting the radial height of the protruding part of the cutter head to be between 0.1 mm ≤ H1 ≤ 0.5 mm, the welding strength between the cutter head and the base body is improved. Because the cutter head of the roughening blade is subjected to a lot of road surface pressure during operation, the welding strength is very important. The cylindrical part of the cutter head is set to be higher than the base body size to ensure the strength of the ball tooth (cutter head) under huge impact stress.

[0015] 2. By setting the length-to-diameter ratio of the cutter head to K, where 1≤K≤2, the strength of the cutter head itself is guaranteed, while also taking into account the welding area of ​​the cutter head. This ensures the welding strength of the cutter head while saving on cemented carbide materials.

[0016] 3. The setting of the distance between the cutter heads, i.e. the tooth pitch, is the result of comprehensively considering the strength of the base tooth seat and the volume requirements of the chip groove, and is the best data obtained from long-term practice.

[0017] 4. The minimum axial wrapping thickness K1 of the substrate on the cutter head is set to ensure the strength of the substrate tooth holder itself and to prevent the tooth holder from breaking when the cutter head is under stress.

[0018] 5. The setting of the depth Δd between the bottom of the chip groove and the outer circle of the substrate ensures the volume of the chip groove and the strength of the substrate. Attached Figure Description

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

[0020] Figure 2 This is a schematic top view of the structure of this application;

[0021] Figure 3 for Figure 1 Sectional view at point AA;

[0022] Figure 4 for Figure 3 Enlarged view of point I;

[0023] Figure 5 This is a three-dimensional structural diagram of the present application;

[0024] Figure 6 for Figure 2 Sectional view at BB;

[0025] Figure 7 This is a schematic diagram of the matrix structure;

[0026] Figure 8 for Figure 7 Sectional view at CC;

[0027] Legend:

[0028] 1-Base, 11-Blind hole, 12-Tooth seat, 13-Chip groove;

[0029] 2-Cutter head. Detailed Implementation

[0030] 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.

[0031] Example

[0032] Reference Figure 1-8 As shown,

[0033] A concrete roughening machine blade includes a base 1 and a cylindrical blade 2 brazed onto the base 1. The base 1 has several toothed seats 12 spaced apart along its outer circumference. The top surface of the blade 2 is hemispherical.

[0034] The gear seat 12 is provided with a blind hole 11, and the cutter head 2 is installed in the blind hole 11. The single-sided gap between the cutter head 2 and the blind hole 11 of the base 1 is controlled at 0.02-0.05 mm so that the cutter head 2 can be smoothly installed into the blind hole 11. If the gap is too large, it will affect the installation accuracy of the cutter head 2; if it is too small, it will be difficult to install the cutter head 2.

[0035] The radial height of the blade tip 2 protruding from the blind hole 11 end face of the tooth seat 12 is H1, which satisfies the condition that 0.1 mm ≤ H1 ≤ 0.5 mm. If the radial height is too small, it will affect the sharpness and life of the blade; if it protrudes too high, the blade tip 2 will be subjected to too much force and is prone to breakage.

[0036] The length-to-diameter ratio of the cutter head 2 is K, where 1 ≤ K ≤ 2. If it exceeds this range, for example, if it is less than 1, the cutter head 2 will be too thick, and the required matrix 1 will also be very thick, which is uneconomical. If it is greater than 2, the cutter head 2 will be too thin, and the cutter head 2 will have low strength and be prone to breakage.

[0037] The number of cutter heads 2 is determined by the circumferential arc distance L between two adjacent cutter heads 2, where 20 mm ≤ L ≤ 35 mm. If the circumferential arc distance L is too small, the cutter heads 2 will be too close together, resulting in a dull blade. If L is too large, the cutter heads 2 will be subjected to excessive force during cutting, leading to a short blade life. Generally, L is taken as 30 mm, and the number of cutter heads is an integer.

[0038] like Figure 6 As shown, the cutter head 2 has a chamfer for guiding the blind hole 11. The chamfer is provided to facilitate the entry of the cutter head 2 into the blind hole 11.

[0039] The tooth holders 12 are evenly distributed along the outer circle of the base 1, and adjacent tooth holders 12 are transitioned by concave arc-shaped chip grooves 13.

[0040] The minimum axial enveloping thickness of the substrate 1 on the cutter head 2 is K1, K1=1 / 2(δ-D3), where δ is the thickness of the substrate 1 and D3 is the outer diameter of the cutter head 2 itself; K1 also needs to satisfy 1.5 mm≤K1≤2.5 mm.

[0041] The value of K1 is related to the axial thickness δ of the base 1 and the diameter of the cutter head 2. The thicker the base 1 and the smaller the diameter of the cutter head 2, the stronger the connection of the cutter head 2, and the less likely the tooth seat 12 of the base 1 will be damaged or cracked. It is preferable to use 2mm for K1.

[0042] The depth between the bottom of the chip groove 13 and the outer circle of the top of the tooth seat 12 of the base 1 is Δd, where Δd = 1 / 2(D2-D1) and 5 mm ≤ Δd ≤ 10 mm. D1 is the diameter of the bottom of the chip groove 13 on the base 1; D2 is the maximum outer diameter of the tooth seat 12 of the base 1. A larger Δd value results in a higher tooth seat 12, which is more prone to breakage, but also a deeper chip groove 13, which facilitates chip discharge. Considering both the volume of the chip groove 13 and the strength of the base 1, a Δd between 5-10 mm is most reasonable. 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 concrete roughening machine blade, characterized in that: The device includes a base (1) and a cylindrical cutting head (2) brazed onto the base (1). The base (1) has several tooth seats (12) spaced apart in the circumferential direction. The tooth seats (12) have blind holes (11) and the cutting head (2) is installed in the blind holes (11). The radial height of the cutting head (2) protruding from the tooth seats (12) is H1, and H1 satisfies the condition that 0.1 mm ≤ H1 ≤ 0.5 mm.

2. The concrete roughening machine blade according to claim 1, characterized in that, The cutter head (2) is provided with a chamfer to facilitate insertion into the blind hole (11).

3. The concrete roughening machine blade according to claim 2, characterized in that, The tooth holders (12) are evenly distributed along the outer circle of the base (1), and adjacent tooth holders (12) are transitioned by concave arc chip grooves (13).

4. The concrete roughening machine blade according to claim 3, characterized in that, The minimum axial thickness of the substrate (1) covering the cutter head (2) is K1, K1=1 / 2(δ-D3), where δ is the thickness of the substrate (1) and D3 is the outer diameter of the cutter head (2); K1 also needs to satisfy 1.5 mm≤K1≤2.5 mm.

5. A concrete roughening machine blade according to claim 2, characterized in that, The depth between the bottom of the chip groove (13) and the outer circle of the tooth seat (12) of the base (1) is Δd, Δd=1 / 2(D2-D1) and 5 mm≤Δd≤10 mm. D1 is the diameter of the bottom of the chip groove (13) on the base (1); D2 is the maximum outer diameter of the tooth seat of the base (1).

6. A concrete roughening machine blade according to claim 5, characterized in that, The length-to-diameter ratio of the cutter head (2) is K, 1≤K≤2.

7. A concrete roughening machine blade according to claim 1, characterized in that, The number of cutter heads (2) is determined by the circumferential arc distance L between two adjacent cutter heads (2), where 20 mm ≤ L ≤ 35 mm.

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