Cutting blade for rough machining of stainless steel flange workpieces

Abstract

The utility model discloses a stainless steel flange type workpiece rough machining cutting blade which comprises a blade body and a cutting unit at the vertex angle of the blade body, and an arc edge, a first arc edge front tool face, a second arc edge front tool face, a chip containing groove and a chip breaking table are sequentially arranged on the center connecting line of the cutting unit and a positioning center hole. A first rake angle alpha is formed by intersecting the first rake face of the arc edge with the upper positioning face or the lower positioning face and ranges from 8 degrees to 15 degrees; and a second front angle beta is formed by intersecting the front cutter surface II of the arc edge with the upper positioning surface or the lower positioning surface, and the angle is 15-20 degrees. The cutting unit adopts a double-large front angle structure, the sharpness and the strength of the blade are perfectly balanced, the wider chip breaker groove fully ensures the chip deformation space, the abrasion of the blade is reduced, and the problems that the viscosity is caused by higher cutting depth and feed amount in the rough machining of stainless steel by the existing cutting blade, and the machining precision is reduced are solved. And the processing efficiency is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cemented carbide blades, and more specifically to a rough machining cutting blade for stainless steel flange workpieces. Background Art

[0002] Stainless steel plays an important role in pipes, valves, flanges, shafts and other parts due to its excellent corrosion resistance. In stainless steel processing, there are the following characteristics:

[0003] First, stainless steel is soft, which leads to serious bonding during machining and easily produces built-up edge;

[0004] Second, the cutting resistance is large, which makes it difficult to discharge the iron chips;

[0005] Third, the thermal conductivity is low, which makes it difficult to dissipate the temperature, generates chip heat, and causes severe work hardening.

[0006] Due to the complexity of the stainless steel processing environment, the knives used to process stainless steel often need to be reliably durable, sharp enough, and maintain good toughness.

[0007] CN202022412583.2 discloses a stainless steel cutting blade, which includes a blade body that is a polygonal body, and the blade body has a plurality of first protrusions and second protrusions along the periphery of the positioning center hole; a cutting unit is provided at the top corner of the blade body, and the cutting unit includes a cutting edge, an arc edge, and a chip breaker. The chip breaker is composed of a first rake face at the arc, a second rake face at the arc, a bottom surface of the chip breaker, a chip breaker table, a chip groove, and a first protrusion. And the cutting edge is composed of a main cutting edge and a secondary cutting edge. The main cutting edge adopts a structure of variable blade width and variable rake angle, and the blade edge strength is stronger than that of the arc edge. The patent adopts a design of variable blade width and variable rake angle at the first cutting edge, which not only takes into account the sharpness of the blade edge, but also ensures sufficient strength of the blade. At the same time, the chip breaking adopts the setting of a double chip breaker table, so that the chip breaking range of the blade is further expanded, so that the blade has a good chip breaking effect. This blade is suitable for finishing of stainless steel workpieces. Its cutting depth and feed rate are relatively small, the overall processing volume is small, and the processing accuracy is high. However, in the rough processing of stainless steel workpieces, the cutting depth and feed rate of the cutting blade in rough processing are higher than those in finishing processing. The cutting process is prone to sticking and other obstacles, which reduces the processing efficiency. At the same time, the rough processing of the finishing blade is also a serious test of the impact resistance of the blade. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide a rough machining cutting blade for stainless steel flange workpieces, aiming at the disadvantage that the existing cutting blades are prone to sticking and the like during rough machining of stainless steel workpieces due to large cutting depth and feed rate, resulting in unsmooth cutting.

[0009] The purpose of the utility model is achieved through the following technical solutions:

[0010] A rough machining cutting blade for a stainless steel flange workpiece, comprising a blade body, the blade body comprising an upper positioning surface, a lower positioning surface and a plurality of flank surfaces for connecting the upper positioning surface and the lower positioning surface, the flank surfaces comprising a cutting edge flank surface and a circular arc edge flank surface, a positioning center hole is provided at the geometric center of the blade body, a cutting unit is provided at the top corner of the blade body, the cutting unit comprises a cutting edge formed by the intersection of the cutting edge flank surface and the upper positioning surface or the lower positioning surface, a circular arc edge formed by the intersection of the circular arc edge flank surface and the upper positioning surface or the lower positioning surface, and a chip breaker groove;

[0011] On the center line connecting the cutting unit and the positioning center hole are the arc blade, the first arc blade rake face, the second arc blade rake face, the chip groove and the chip breaker in sequence. The first arc blade rake face intersects with the upper positioning surface or the lower positioning surface to form a first rake angle α, which is 8° to 15°; the second arc blade rake face intersects with the upper positioning surface or the lower positioning surface to form a second rake angle β, which is 15° to 20°. The blade band width L1 of the first arc blade rake face is 0.1mm to 0.3mm; the blade band width L2 of the second arc blade rake face is 0.5mm to 0.8mm.

[0012] Furthermore, the first rake angle α is 11°, and the second rake angle β is 18°.

[0013] Furthermore, the first arc edge rake face is connected to the first cutting edge rake face to form a first rake face, and the second arc edge rake face is connected to the second cutting edge rake face to form a second rake face.

[0014] Furthermore, the inclination angle between the first cutting edge rake face and the upper positioning face or the lower positioning face is the same as the first rake angle α of the first arc edge rake face.

[0015] Furthermore, the inclination angle between the second cutting edge rake face and the upper positioning surface or the lower positioning surface is the same as the second rake angle β of the second arc edge rake face.

[0016] Furthermore, the land width L1 is 0.2 mm; the land width L2 is 0.67 mm.

[0017] Furthermore, the chip breaker is a conical structure, and an inclination angle γ between the chip breaker and the upper positioning surface or the lower positioning surface is 30° to 50°.

[0018] Preferably, the chip breaker has an inclination angle γ of 40°.

[0019] Furthermore, a height H1 from the chip groove to the upper positioning surface or the lower positioning surface is 0.2 mm to 0.5 mm.

[0020] Preferably, the height H1 is 0.3 mm.

[0021] Furthermore, the blade body is a polygonal body, and at least one cutting unit is arranged on it.

[0022] Furthermore, the cutting units are connected by a plurality of "V-shaped" and "flower-shaped" structures to form a chip holding area.

[0023] Compared with the prior art, the beneficial effects are:

[0024] The cutting blade described in the utility model uses a double large rake angle structure in the cutting unit. When the first rake face is cut at a rake angle of 8° to 15°, the large rake angle makes the blade's cutting resistance small and the cutting is smooth; on the other hand, it reduces work hardening and inhibits the generation of built-up edge. In addition, the utility model retains a wider chip breaker groove between the rake face and the chip breaker table, which fully guarantees the chip deformation space, reduces blade wear, makes cutting light and smooth during the processing, and greatly improves the tool life. At the same time, the large rake angle structure adopted by the utility model not only ensures the sharpness of the blade, but also takes into account the impact resistance of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional diagram of a stainless steel rough machining cutting blade in Embodiment 1;

[0026] Figure 2 It is a partial enlarged view of the cutting unit;

[0027] Figure 3 This is a front view of a stainless steel rough machining cutting blade in this embodiment 1;

[0028] Figure 4 for Figure 3 The blade is shown in a cross-sectional view along line YY.

[0029] Among them, 1 is a blade body, 2 is an upper positioning surface, 3 is a lower positioning surface, 4 is a cutting edge back face, 5 is a circular arc edge back face, 6 is a circular arc edge, 7 is a cutting edge, 8 is a circular arc edge front face one, 9 is a circular arc edge front face two, 10 is a cutting edge front face one, 11 is a cutting edge front face two, 12 is a chip groove, 13 is a chip breaker, and 15 is a positioning center hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that if there are directional indications (such as up, down, left, right, front, and back) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. If there are descriptions of "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] Example 1

[0035] A rough machining cutting blade for stainless steel flange workpieces comprises a regular quadrilateral blade body 1, wherein the blade body 1 comprises an upper positioning surface 2, a lower positioning surface 3 and a plurality of back cutting surfaces for connecting the upper positioning surface 2 and the lower positioning surface 3.

[0036] The flank surface includes the flank surface 4 of the cutting edge 7 and the flank surface 5 of the arc edge 6, which are connected to each other. A positioning center hole 15 is provided at the geometric center of the blade body 1. A cutting unit is provided at the top corner of the blade body 1. The cutting unit includes the cutting edge 7 involved in chip cutting of the workpiece, the arc edge 6 for finishing, and a chip breaker. The cutting edge 7 is formed by the intersection of the flank surface 4 of the cutting edge 7 and the upper positioning surface 2 or the lower positioning surface 3, and the arc edge 6 is formed by the intersection of the flank surface 5 of the arc edge 6 and the upper positioning surface 2 or the lower positioning surface 3.

[0037] On the line connecting the top corner of the cutting unit and the center of the positioning center hole 15, there are the arc edge 6, the arc edge front cutting surface 1 8, the arc edge front cutting surface 2 8, the chip groove 12 and the chip breaker 13 in sequence. The arc edge front cutting surface 1 8 intersects with the upper positioning surface 2 or the lower positioning surface 3 to form a first front angle α, and the angle is 8° to 15°; the arc edge front cutting surface 2 8 intersects with the upper positioning surface 2 or the lower positioning surface 3 to form a second front angle β, and the angle is 15° to 20°. The blade width L1 of the arc edge front cutting surface 1 8 is 0.1mm to 0.3mm; the blade width L2 of the arc edge front cutting surface 2 8 is 0.5mm to 0.8mm.

[0038] Example 2

[0039] A rough machining cutting blade for stainless steel flange workpieces comprises a regular quadrilateral blade body 1, wherein the blade body 1 comprises an upper positioning surface 2, a lower positioning surface 3 and a plurality of back cutting surfaces for connecting the upper positioning surface 2 and the lower positioning surface 3.

[0040] The flank surface includes the flank surface 4 of the cutting edge 7 and the flank surface 5 of the arc edge 6, which are connected to each other. A positioning center hole 15 is provided at the geometric center of the blade body 1. A cutting unit is provided at the top corner of the blade body 1. The cutting unit includes the cutting edge 7 involved in chip cutting of the workpiece, the arc edge 6 for finishing, and a chip breaker. The cutting edge 7 is formed by the intersection of the flank surface 4 of the cutting edge 7 and the upper positioning surface 2 or the lower positioning surface 3, and the arc edge 6 is formed by the intersection of the flank surface 5 of the arc edge 6 and the upper positioning surface 2 or the lower positioning surface 3.

[0041] On the line connecting the top corner of the cutting unit and the center of the positioning center hole 15, there are arc blade 6, arc blade rake face 1 8, arc blade rake face 2 8, chip groove 12 and chip breaker 13 in sequence. The arc blade rake face 1 8 is connected with the cutting edge rake face 1 10 to form a first rake face, and the arc blade rake face 2 8 is connected with the cutting edge rake face 2 11 to form a second rake face. The first rake face intersects with the upper positioning surface 2 or the lower positioning surface 3 to form a first rake angle α, which is 8° to 15°; the second rake face intersects with the upper positioning surface 2 or the lower positioning surface 3 to form a second rake angle β, which is 15° to 20°. The blade band width L1 of the arc blade rake face 1 8 is 0.1mm to 0.3mm; the blade band width L2 of the arc blade rake face 2 8 is 0.5mm to 0.8mm.

[0042] Example 3

[0043] A rough machining cutting blade for stainless steel flange workpieces comprises a regular quadrilateral blade body 1, wherein the blade body 1 comprises an upper positioning surface 2, a lower positioning surface 3 and a plurality of back cutting surfaces for connecting the upper positioning surface 2 and the lower positioning surface 3.

[0044] The flank surface includes the flank surface 4 of the cutting edge 7 and the flank surface 5 of the arc edge 6, which are connected to each other. A positioning center hole 15 is provided at the geometric center of the blade body 1. A cutting unit is provided at the top corner of the blade body 1. The cutting unit includes the cutting edge 7 involved in chip cutting of the workpiece, the arc edge 6 for finishing, and a chip breaker. The cutting edge 7 is formed by the intersection of the flank surface 4 of the cutting edge 7 and the upper positioning surface 2 or the lower positioning surface 3, and the arc edge 6 is formed by the intersection of the flank surface 5 of the arc edge 6 and the upper positioning surface 2 or the lower positioning surface 3.

[0045] On the line connecting the top corner of the cutting unit and the center of the positioning center hole 15, there are arc blade 6, arc blade rake face 1 8, arc blade rake face 2 8, chip groove 12 and chip breaker 13 in sequence. The arc blade rake face 1 8 is connected with the cutting edge rake face 1 10 to form a first rake face, and the arc blade rake face 2 8 is connected with the cutting edge rake face 2 11 to form a second rake face. The first rake face intersects with the upper positioning surface 2 or the lower positioning surface 3 to form a first rake angle α, which is 8° to 15°; the second rake face intersects with the upper positioning surface 2 or the lower positioning surface 3 to form a second rake angle β, which is 15° to 20°. The blade band width L1 of the arc blade rake face 1 8 is 0.1mm to 0.3mm; the blade band width L2 of the arc blade rake face 2 8 is 0.5mm to 0.8mm. The chip breaker 13 is a conical structure, and the inclination angle γ between the chip breaker 13 and the upper positioning surface 2 or the lower positioning surface 3 is 30° to 50°.

[0046] Example 4

[0047] A rough machining cutting blade for stainless steel flange workpieces comprises a regular quadrilateral blade body 1, wherein the blade body 1 comprises an upper positioning surface 2, a lower positioning surface 3 and a plurality of back cutting surfaces for connecting the upper positioning surface 2 and the lower positioning surface 3.

[0048] The flank surface includes the flank surface 4 of the cutting edge 7 and the flank surface 5 of the arc edge 6, which are connected to each other. A positioning center hole 15 is provided at the geometric center of the blade body 1. A cutting unit is provided at the top corner of the blade body 1. The cutting unit includes the cutting edge 7 involved in chip cutting of the workpiece, the arc edge 6 for finishing, and a chip breaker. The cutting edge 7 is formed by the intersection of the flank surface 4 of the cutting edge 7 and the upper positioning surface 2 or the lower positioning surface 3, and the arc edge 6 is formed by the intersection of the flank surface 5 of the arc edge 6 and the upper positioning surface 2 or the lower positioning surface 3.

[0049] On the line connecting the top corner of the cutting unit and the center of the positioning center hole 15, there are arc blade 6, arc blade rake face 1 8, arc blade rake face 2 8, chip groove 12 and chip breaker 13 in sequence. The arc blade rake face 1 8 is connected with the cutting edge rake face 1 10 to form a first rake face, and the arc blade rake face 2 8 is connected with the cutting edge rake face 2 11 to form a second rake face. The first rake face intersects with the upper positioning surface 2 or the lower positioning surface 3 to form a first rake angle α, which is 8° to 15°; the second rake face intersects with the upper positioning surface 2 or the lower positioning surface 3 to form a second rake angle β, which is 15° to 20°. The blade band width L1 of the arc blade rake face 1 8 is 0.1mm to 0.3mm; the blade band width L2 of the arc blade rake face 2 8 is 0.5mm to 0.8mm. The chip breaker 13 is a conical structure, and the inclination angle γ between it and the upper positioning surface 2 or the lower positioning surface 3 is 30° to 50°. The chip groove 12 formed by the first rake face, the second rake face and the chip breaker 13 has a height H1 from the bottom of the chip groove 12 to the upper positioning surface 2 or the lower positioning surface 3 of 0.2mm to 0.5mm.

[0050] Example 5

[0051] A rough machining cutting blade for stainless steel flange workpieces, such as Figure 1 , including a regular quadrilateral blade body 1, wherein the blade body 1 includes an upper positioning surface 2, a lower positioning surface 3 and a plurality of back cutting surfaces for connecting the upper positioning surface 2 and the lower positioning surface 3.

[0052] The flank surface includes the flank surface 4 of the cutting edge 7 and the flank surface 5 of the arc edge 6, which are connected to each other. A positioning center hole 15 is provided at the geometric center of the blade body 1. Cutting units are provided at the four vertex corners of the blade body 1. The cutting units include the cutting edge 7 involved in the chip cutting of the workpiece, the arc edge 6 for finishing, and the chip breaker. The cutting edge 7 is formed by the intersection of the flank surface 4 of the cutting edge 7 and the upper positioning surface 2 or the lower positioning surface 3, and the arc edge 6 is formed by the intersection of the flank surface 5 of the arc edge 6 and the upper positioning surface 2 or the lower positioning surface 3.

[0053] like Figure 2 The arc edge 6, the arc edge rake face 1 8, the arc edge rake face 2 8, the chip groove 12 and the chip breaker 13 are arranged on the line connecting the top corner of the cutting unit and the center of the positioning center hole 15. The arc edge rake face 1 8 is connected with the cutting edge rake face 1 10 to form a first rake face, and the arc edge rake face 2 8 is connected with the cutting edge rake face 2 11 to form a second rake face. Figure 3-4The first rake face intersects with the upper positioning surface 2 or the lower positioning surface 3 to form a first rake angle α, which is 8° to 15°; the second rake face intersects with the upper positioning surface 2 or the lower positioning surface 3 to form a second rake angle β, which is 15° to 20°. The edge width L1 of the arc edge rake face 1 8 is 0.1mm to 0.3mm; the edge width L2 of the arc edge rake face 2 8 is 0.5mm to 0.8mm. The chip breaker 13 is a conical structure, and its inclination angle γ with the upper positioning surface 2 or the lower positioning surface 3 is 30° to 50°. The chip groove 12 formed by the first rake face, the second rake face and the chip breaker 13 has a height H1 from the bottom of the chip groove 12 to the upper positioning surface 2 or the lower positioning surface 3 of 0.2mm to 0.5mm.

[0054] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A rough machining cutting blade for stainless steel flange workpieces, characterized in that: The blade body comprises an upper positioning surface, a lower positioning surface and a plurality of flank surfaces for connecting the upper positioning surface and the lower positioning surface, the flank surfaces comprise a cutting edge flank surface and a circular arc edge flank surface, a positioning center hole is provided at the geometric center of the blade body, a cutting unit is provided at the top corner of the blade body, the cutting unit comprises a cutting edge formed by the intersection of the cutting edge flank surface and the upper positioning surface or the lower positioning surface, a circular arc edge formed by the intersection of the circular arc edge flank surface and the upper positioning surface or the lower positioning surface, and a chip breaker groove; On the center line connecting the cutting unit and the positioning center hole are the arc blade, the first arc blade rake face, the second arc blade rake face, the chip groove and the chip breaker in sequence. The first arc blade rake face intersects with the upper positioning surface or the lower positioning surface to form a first rake angle α, which is 8° to 15°; the second arc blade rake face intersects with the upper positioning surface or the lower positioning surface to form a second rake angle β, which is 15° to 20°. The blade band width L1 of the first arc blade rake face is 0.1mm to 0.3mm; the blade band width L2 of the second arc blade rake face is 0.5mm to 0.8mm.

2. The rough machining cutting blade for stainless steel flange workpiece according to claim 1, characterized in that: The first rake angle α is 11°, and the second rake angle β is 18°.

3. The rough machining cutting blade for stainless steel flange workpiece according to claim 1, characterized in that: The first arc edge rake face is connected with the first cutting edge rake face to form a first rake face, and the second arc edge rake face is connected with the second cutting edge rake face to form a second rake face.

4. The rough machining cutting blade for stainless steel flange workpiece according to claim 3, characterized in that: The inclination angle between the cutting edge rake face 1 and the upper positioning face or the lower positioning face is the same as the first rake angle α of the arc edge rake face 1.

5. The rough machining cutting blade for stainless steel flange workpiece according to claim 3, characterized in that: The inclination angle between the second cutting edge rake face and the upper positioning face or the lower positioning face is the same as the second rake angle β of the second arc edge rake face.

6. The rough machining cutting blade for stainless steel flange workpiece according to claim 1, characterized in that: The land width L1 is 0.2 mm; the land width L2 is 0.67 mm.

7. The rough machining cutting blade for stainless steel flange workpiece according to claim 1, characterized in that: The chip breaker is a conical structure, and the inclination angle γ between the chip breaker and the upper positioning surface or the lower positioning surface is 30° to 50°.

8. The rough machining cutting blade for stainless steel flange workpiece according to claim 1, characterized in that: A height H1 from the chip groove to the upper positioning surface or the lower positioning surface is 0.2 mm to 0.5 mm.

9. The rough machining cutting blade for stainless steel flange workpiece according to claim 1, characterized in that: The blade body is a polygonal body, and at least one cutting unit is arranged on it.

10. The rough machining cutting blade for stainless steel flange workpiece according to claim 1, characterized in that: The cutting units are connected via a plurality of "V-shaped" and "flower-shaped" structures.

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