Scraper for processing dovetail groove

Abstract

The utility model relates to the technical field of cutters, and discloses a scraper for dovetail groove processing, which comprises a cutter handle, a cutter head and a diamond blade, the cutter head comprises a supporting part and a connecting part, the connecting part is connected with the cutter handle, one end of the supporting part, which is not connected with the connecting part, is provided with a mounting groove, and the diamond blade is fixed in the mounting groove. The diamond blade and the supporting part jointly form a composite tool bit structure of the scraper for dovetail groove machining. The composite tool bit structure is provided with a bottom edge and two side edges, the bottom edge is a flat edge, the two side edges are oppositely arranged on the two sides of the bottom edge in the first direction, and an acute angle is formed between the plane where any side edge is located and the plane where the bottom edge is located. The scraper for dovetail groove machining can be fixed to a tool rest, the tool rest moves to drive the scraper for dovetail groove machining to move in the extending direction of a dovetail groove so as to grind the bottom wall of the dovetail groove, the manual grinding procedure can be omitted, the production efficiency can be improved, the strength of the diamond blade is high, and when a workpiece is ground, the brightness of the scraping face is high.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a scraper for machining dovetail grooves. Background Art

[0002] The conventional dovetail cutter processing method is to rotate the tool at high speed to cut the product into the desired shape. When the tool rotates at high speed, the bottom surface of the tool and the bottom surface of the cut product will produce circular lines visible to the naked eye. This line is not allowed for the sealing area of ​​the product. Therefore, the circular lines produced after this processing need to be removed by manual polishing in the later stage to meet the product requirements. Manual polishing of this small sealing area is very difficult and inefficient.

[0003] Therefore, a dovetail groove processing scraper is urgently needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a scraper for processing a dovetail groove, which can improve the processing accuracy of the dovetail groove and ensure the processing efficiency.

[0005] As conceived above, the technical solution adopted by the present utility model is:

[0006] Provided is a scraper for machining dovetail grooves, comprising a tool handle, a tool head, and a diamond blade. The tool head comprises a supporting portion and a connecting portion, the connecting portion being connected to the tool handle, a mounting groove being provided at one end of the supporting portion not connected to the connecting portion, the diamond blade being fixed in the mounting groove, the diamond blade and the supporting portion together forming a composite tool head structure of the scraper for machining dovetail grooves;

[0007] The composite blade structure has a bottom blade and two side blades, the bottom blade is a flat blade, the two side blades are arranged on both sides of the bottom blade relative to each other in the first direction, and the plane where any one of the side blades is located is arranged at an acute angle to the plane where the bottom blade is located.

[0008] Optionally, the angle between the plane where any one of the side edges is located and the plane where the bottom edge is located is A, A=90°-B, 1°≤B≤5°.

[0009] Optionally, the maximum length of the diamond blade in the first direction is a, 2mm≤a≤5mm.

[0010] Optionally, the maximum thickness of the diamond blade in the second direction is b, 1 mm ≤ b ≤ 3 mm, and the second direction is perpendicular to the first direction.

[0011] Optionally, the connecting portion has two avoidance surfaces arranged opposite to each other in the first direction, the two avoidance surfaces are arranged at an angle, the distance between the two avoidance surfaces at one end connected to the support portion in the first direction is L1, and the distance between the two avoidance surfaces at one end connected to the tool handle in the first direction is L2, and L1<L2.

[0012] Optionally, a chamfer is provided at the connection between the avoidance surface and the side edge.

[0013] Optionally, the outer peripheral surface of the tool handle is recessed in a second direction to form a fixed platform, and the fixed platform is used to abut against a fastener of a scraper clamping mechanism to fix the scraper for dovetail groove processing to the scraper clamping mechanism, and the second direction is perpendicular to the first direction.

[0014] Optionally, the scraper for processing the dovetail groove is also provided with an air avoidance groove, a part of the air avoidance groove is located on the connecting part, and the other part is located on the tool handle, one end of the air avoidance groove extends to the fixed platform, and the other end extends to the mounting platform of the support part, and the mounting groove is provided on the mounting platform.

[0015] Optionally, the diamond blade is welded in the mounting groove.

[0016] Optionally, the shank is made of cemented carbide.

[0017] The beneficial effects of the utility model are:

[0018] The scraper for processing dovetail grooves proposed in the present invention includes a shank, a blade head and a diamond blade. The blade head includes a supporting portion and a connecting portion. The connecting portion is connected to the shank. A mounting groove is provided at one end of the supporting portion that is not connected to the connecting portion. The diamond blade is fixed in the mounting groove. The diamond blade and the supporting portion together form a composite blade head structure of the scraper for processing dovetail grooves. The composite blade head structure has a bottom blade and two side blades. The bottom blade is a flat blade. The two side blades are arranged on both sides of the bottom blade relative to each other in a first direction, and the plane where any one of the side blades is located is arranged at an acute angle to the plane where the bottom blade is located. When it is necessary to grind the dovetail groove, the scraper for processing the dovetail groove can be fixed on a tool holder. The tool holder moves to drive the scraper for processing the dovetail groove to move along the extension direction of the dovetail groove to grind the bottom wall of the dovetail groove. This can eliminate the need for manual grinding and improve production efficiency. The composite cutter head structure has a high strength diamond blade, which can achieve a bright effect that cannot be achieved by ordinary carbide blade cutting when grinding the workpiece, making the scraping surface bright. In addition, because the plane where any side blade of the composite cutter head structure is located is at an acute angle to the plane where the bottom blade is located, that is, the composite cutter head structure is trapezoidal, in the depth direction of the dovetail groove, from the opening to the bottom of the dovetail groove, the width of the composite cutter head structure gradually increases, so that the bottom blade can contact the bottom wall of the dovetail groove to the greatest extent, while the side blades can avoid interference with the side walls of the dovetail groove. Therefore, when grinding the bottom wall of the dovetail groove, there is no need to rotate, that is, the processing texture is in the same direction as the grain, the texture consistency is high, and the surface roughness can fully meet the processing requirements, ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the scraper for dovetail groove processing provided by the embodiment of the utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the scraper for dovetail groove processing provided by the embodiment of the utility model. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the structure of the scraper for dovetail groove processing provided by the embodiment of the utility model. Figure 3 (No diamond blade).

[0022] In the picture:

[0023] 1. Handle; 2. Cutting head; 21. Connecting part; 22. Supporting part; 3. Diamond blade;

[0024] 101. Bottom blade; 102. Side blade; 103. Mounting groove; 104. Avoidance surface; 105. Avoidance groove; 106. Fixing platform; 107. Mounting platform. DETAILED DESCRIPTION

[0025] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of it.

[0026] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0030] like Figures 1 to 3As shown, this embodiment provides a scraper for processing dovetail grooves, comprising a handle 1, a blade head 2, and a diamond blade 3. The blade head 2 comprises a support portion 22 and a connection portion 21. The connection portion 21 is connected to the handle 1. A mounting groove 103 is provided at the end of the support portion 22 not connected to the connection portion 21. The diamond blade 3 is fixed in the mounting groove 103. The diamond blade 3 and the support portion 22 together form a composite blade head structure for the scraper for processing dovetail grooves. The composite blade head structure comprises a bottom blade 101 and two side blades 102. The bottom blade 101 is a flat blade. The two side blades 102 are arranged on opposite sides of the bottom blade 101 in a first direction, and the plane on which any side blade 102 is located forms an acute angle with the plane on which the bottom blade 101 is located. When grinding a dovetail groove, the dovetail groove scraper can be fixed to a tool holder. The tool holder moves to drive the dovetail groove scraper along the extension direction of the dovetail groove, grinding the bottom wall of the dovetail groove. This eliminates the need for manual grinding and improves production efficiency. Furthermore, the high-strength diamond blade 3 of the composite tool head structure can achieve a bright finish on the workpiece, which cannot be achieved by ordinary carbide blades, resulting in a high-gloss scraped surface. In addition, because the plane on which any side blade 102 of the composite cutter head structure lies forms an acute angle with the plane on which the bottom blade 101 lies, i.e., the composite cutter head structure is trapezoidal, the width of the composite cutter head structure gradually increases from the opening to the bottom of the dovetail groove in the depth direction of the dovetail groove, so that the bottom blade 101 can contact the bottom wall of the dovetail groove to the greatest extent, while the side blade 102 can avoid interference with the side wall of the dovetail groove. Therefore, when grinding the bottom wall of the dovetail groove, there is no need to rotate, i.e., the processed grain is in the same direction as the grain, the grain consistency is high, and the surface roughness can fully meet the processing requirements, ensuring product quality. The first direction is the ab direction in the figure.

[0031] During specific implementation, the scraper for dovetail groove processing is installed on a movable tool holder through a scraper clamping mechanism. The scraper clamping mechanism includes a sleeve and a fastener. The tool handle 1 is inserted into the sleeve. The sleeve is cylindrical, and the tool handle 1 as a whole is also a cylindrical structure. The outer peripheral surface of the tool handle 1 is recessed in the second direction to form a fixed platform 106. The fastener is a tightening screw provided on the sleeve. The tightening screw passes through the sleeve and is tightened on the fixed platform 106 to fix the tool handle 1 to the sleeve.

[0032] During machining, if the bottom edge 101 is too large, the cutting resistance will increase and affect the surface cutting quality, while if the bottom edge 101 is too small, it will be difficult to ensure the rigidity of the composite cutter head structure. Optionally, the maximum length of the diamond blade 3 in the first direction is a, 2mm≤a≤5mm.

[0033] Optionally, the angle between the plane on which any side cutting edge 102 lies and the plane on which the bottom cutting edge 101 lies is A, where A = 90° - B, and 1° ≤ B ≤ 5°. In this embodiment, the side cutting edge 102 is designed to have a single-sided angle of 3°, i.e., B = 3°. The length of the bottom cutting edge 101 in the first direction is 2.6 mm. This ensures that the bottom cutting edge 101 of the composite blade structure can cut to the maximum extent while preventing the two side cutting edges 102 from being too narrow at the ends close to each other in the extension direction, thereby ensuring the rigidity of the composite blade structure.

[0034] The diamond blade 3 is installed in the mounting groove 103 and is flush with the notch of the mounting groove 103 to ensure that the force applied to the diamond blade 3 can be transmitted to the inner wall of the mounting groove 103, ensuring the installation stability of the diamond blade 3. Furthermore, the mounting groove 103 is located at the end of the support portion 22. In the second direction, the greater the thickness of the diamond blade 3, the deeper the mounting groove 103, and the smaller the remaining portion of the support portion 22. However, if the remaining portion of the support portion 22 is too small, it will be difficult to ensure its own strength. Optionally, the maximum thickness of the diamond blade 3 in the second direction is b, 1mm≤b≤3mm, and the second direction is perpendicular to the first direction. The second direction is the cd direction in the figure.

[0035] Optionally, the diamond blade 3 is welded within the mounting groove 103. In this embodiment, the maximum thickness of the diamond blade 3 in the second direction is 1 mm. This prevents the diamond blade 3 from being too thick, which would cause the corresponding portion of the support portion 22 to be too thin, thereby preventing deformation caused by welding. If the diamond blade 3 is too thin, i.e., less than 1 mm, it may easily cause brittle cracking during welding.

[0036] Optionally, the handle 1 is made of cemented carbide. The high strength and hardness of cemented carbide make the handle 1 less likely to deform or be damaged when subjected to high loads, thereby improving the stability and durability of the handle 1.

[0037] Optionally, the connecting portion 21 has two relief surfaces 104 disposed opposite each other in the first direction. The relief surfaces 104 are inclined. A distance L1 is defined between the two relief surfaces 104 connecting to the support portion 22 in the first direction, and a distance L2 is defined between the two relief surfaces 104 connecting to one end of the tool holder 1 in the first direction, where L1 < L2. The inclined arrangement of the relief surfaces 104 forms a relief structure on the connecting portion 21, which is used to prevent interference between the tool head 2 and the sidewalls of the dovetail groove when machining the dovetail groove.

[0038] In this embodiment, the connection between the avoidance surface 104 and the side edge 102 is chamfered to avoid stress concentration at the connection, improve the fatigue strength of the connection, and ensure the stability of the composite cutter head structure. In this embodiment, the radius of the chamfer is 2 mm.

[0039] Optionally, the dovetail groove scraper is further provided with an air-clearance groove 105. A portion of the air-clearance groove 105 is located on the connecting portion 21, and the other portion is located on the tool handle 1. One end of the air-clearance groove 105 extends to the fixing platform 106, and the other end extends to the mounting platform 107 of the support portion 22. The mounting groove 103 is disposed on the mounting platform 107. The provision of the air-clearance groove 105 provides more space for re-grinding the composite tool head structure and also facilitates measurement of the composite tool head structure using a tool setter. In this embodiment, the bottom of the air-clearance groove 105 is a circular arc with a radius of 4 mm.

[0040] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications are possible without departing from the spirit and scope of the present invention. Such changes and modifications are within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A scraper for dovetail groove processing, characterized in that: The invention comprises a tool handle (1), a tool head (2) and a diamond blade (3), wherein the tool head (2) comprises a supporting portion (22) and a connecting portion (21), wherein the connecting portion (21) is connected to the tool handle (1), and a mounting groove (103) is provided at one end of the supporting portion (22) not connected to the connecting portion (21), wherein the diamond blade (3) is fixed in the mounting groove (103), and the diamond blade (3) and the supporting portion (22) together form a composite tool head structure of the scraper for processing a dovetail groove; The composite blade structure comprises a bottom blade (101) and two side blades (102), wherein the bottom blade (101) is a flat blade, and the two side blades (102) are arranged on opposite sides of the bottom blade (101) in a first direction, and the plane where any one of the side blades (102) is located is arranged at an acute angle to the plane where the bottom blade (101) is located.

2. The scraper for dovetail groove processing according to claim 1, characterized in that: The angle between the plane where any one of the side blades (102) is located and the plane where the bottom blade (101) is located is A, A=90°-B, 1°≤B≤5°.

3. The scraper for processing a dovetail groove according to claim 1 or 2, characterized in that: The maximum length of the diamond blade (3) in the first direction is a, 2mm≤a≤5mm.

4. The scraper for processing a dovetail groove according to claim 1, characterized in that: The maximum thickness of the diamond blade (3) in the second direction is b, 1mm≤b≤3mm, and the second direction is perpendicular to the first direction.

5. The scraper for dovetail groove processing according to claim 1, characterized in that: The connecting portion (21) has two avoidance surfaces (104) arranged opposite to each other in the first direction, the two avoidance surfaces (104) are arranged obliquely, the spacing between the two avoidance surfaces (104) at one end connected to the support portion (22) in the first direction is L1, and the spacing between the two avoidance surfaces (104) at one end connected to the shank (1) in the first direction is L2, and L1<L2.

6. The scraper for processing a dovetail groove according to claim 5, characterized in that: A chamfer is provided at the connection between the avoidance surface (104) and the side edge (102).

7. The scraper for dovetail groove processing according to claim 1, characterized in that: The outer peripheral surface of the tool handle (1) is recessed in a second direction to form a fixed platform (106), and the fixed platform (106) is used to abut against a fastener of a scraper clamping mechanism to fix the scraper for dovetail groove processing to the scraper clamping mechanism, and the second direction is perpendicular to the first direction.

8. The scraper for processing a dovetail groove according to claim 7, characterized in that: The scraper for processing the dovetail groove is also provided with an air avoidance groove (105), a portion of the air avoidance groove (105) is located on the connecting portion (21), and the other portion is located on the shank (1), one end of the air avoidance groove (105) extends to the fixed platform (106), and the other end extends to the mounting platform (107) of the support portion (22), and the mounting groove (103) is provided on the mounting platform (107).

9. The scraper for processing a dovetail groove according to claim 1, characterized in that: The diamond blade (3) is welded in the mounting groove (103).

10. The scraper for processing a dovetail groove according to claim 1, characterized in that: The knife handle (1) is made of hard alloy material.

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