A slotting tool with a chip breaker

Abstract

The utility model relates to a grooving tool with a chip breaker block, and belongs to the technical field of cutting tools. The utility model includes a tool body and a chip breaker block, and a blade is provided at the front end of the tool body; the chip breaker block is provided on the tool body, and the chip breaker block is located on a side of the blade used for cutting; the chip breaker block and the blade are arranged separately, and there is a gap between the edge of the chip breaker block and the edge of the blade, and the width of the gap decreases from front to back. The cutting edge of the blade includes a semicircular arc segment, and the front end edge of the chip breaker block is a parabola with an opening facing backward, so that the width of the gap decreases from front to back. The chip breaker block is integrally formed on the tool body. The utility model has a better chip breaking effect, and can avoid the generated chips from being too long and wrapping around the tool. At the same time, the blade in the utility model is easy to install and disassemble, and the assembly efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a grooving tool with a chip breaker block. Background Art

[0002] A grooving tool, also called a grooving tool or a groove tool, is a tool specially used for machining grooves, keyways, T-slots, semicircular grooves and other features on the surface of shaft or disc parts on a lathe. During use, in order to meet the chip breaking requirements, a protruding cylindrical structure is often welded on the front cutting edge as a chip breaker column to avoid long chips wrapping around the tool. When welding the chip breaker column on the blade, in order to avoid the welding affecting the strength of the blade, the chip breaker column will be kept away from the connection between the cutter head and the tool rod, thus preventing the cutter head from breaking at a weak position. When the chip breaker column is closer to the front end of the blade, the distance between the outer surface of the chip breaker column and the cutting end of the blade will be uneven, such as Figure 7 As shown, when such a blade structure is used to process a curved surface on a workpiece, the angle between the tangent at the contact position between the blade and the workpiece and the tool axis changes continuously. When the cutting depth is constant, the distance between the contact position between the blade and the workpiece and the chip breaker column may be greater than the cutting depth. This will cause the chips to fail to collide with the chip breaker column and break, and the chip breaker column has a smaller effective area. In this way, the grooving tool cannot meet the chip breaking requirements and the chip breaking effect is poor. Utility Model Content

[0003] The utility model provides a slotting tool with a chip breaking block to solve the technical problem that the chip breaking effect of the slotting tool in the prior art is poor.

[0004] In order to solve the above problems, the utility model provides a slotting tool with a chip breaker block adopts the following technical solutions:

[0005] A slotting tool with a chip breaker block, comprising:

[0006] A knife body, wherein a blade is provided at the front end of the knife body;

[0007] A chip breaker block is provided on the cutter body, and the chip breaker block is located on a side of the blade used for cutting;

[0008] The chip breaking block and the blade are arranged separately, and there is a gap between the edge of the chip breaking block and the edge of the blade, and the width of the gap decreases from the front to the back.

[0009] The beneficial effect of the above technical solution is: when the cutting depth is certain, if the outer wall of the front end of the chip breaker block can collide with the chips, the outer wall of the rear side of the chip breaker block can also collide with the chips to break the chips. In this way, during the cutting process, the area of ​​the outer wall of the chip breaker block that can play a chip breaking effect is larger, which can adapt to the relative position change between the grooving tool and the workpiece, and the chip breaking effect is better.

[0010] Furthermore, the edge of the blade includes a semicircular arc segment, and the front end edge of the chip breaker block is in a parabolic shape with an opening facing backwards, so that the width of the interval decreases from front to back.

[0011] Furthermore, the chip breaking block is integrally formed on the cutter body.

[0012] The beneficial effects of the above technical solution are: the tool structure is more complete and easier to assemble.

[0013] Furthermore, the front end of the tool body includes a fixing part and a pressing part, a second dividing groove is provided between the fixing part and the pressing part, the pressing part is elastic, and is used to press the blade and the chip breaker block onto the fixing part.

[0014] The beneficial effect of the above technical solution is that the fixing part and the pressing part are part of the knife body, the structure is more complete, and there is no need to assemble multiple independent parts, so it is more convenient to assemble.

[0015] Further, the pressing part includes a blade pressing part and a chip breaker block pressing part, the front end of the blade pressing part is used to press the blade onto the fixing part, the front end of the chip breaker block pressing part is used to press the chip breaker block onto the blade, a first separation groove is provided between the blade pressing part and the chip breaker block pressing part, and the front end of the chip breaker block pressing part extends to the front of the blade pressing part;

[0016] The slotting tool comprises a blade clamping bolt which penetrates the blade clamping part and the chip breaker block clamping part and is screwed in the fixing part, and also comprises a chip breaker block clamping bolt which penetrates the chip breaker block clamping part and is screwed on the blade clamping part.

[0017] The beneficial effect of the above technical solution is that the clamping part is divided into a blade clamping part for clamping the blade and a chip breaker block clamping part for clamping the chip breaker block. The clamping effect is better, so that the chip breaker block is pressed on the blade, which can avoid the formation of a gap between the chip breaker block and the blade to prevent chips from being stuck.

[0018] Furthermore, a first concave-convex positioning structure is provided on the opposite sides of the blade and the blade pressing part, and the first concave-convex positioning structure includes a first positioning recess provided on one of the blade and the blade pressing part, and a first positioning protrusion provided on the other. The first positioning recess and the first positioning protrusion cooperate with each other to position the blade, and the positioning direction is perpendicular to the front-to-back direction and the pressing direction of the blade pressing part.

[0019] The beneficial effect of the above technical solution is that the first concave-convex positioning structure is provided to position the blade, so that the blade is fixed more firmly and the blade is prevented from shaking.

[0020] Furthermore, a second concave-convex positioning structure is provided on the opposite sides of the blade and the fixed part, and the second concave-convex positioning structure includes a second positioning recess provided on one of the blade and the fixed part, and a second positioning protrusion provided on the other. The second positioning recess and the second positioning protrusion cooperate with each other to position the blade, and the positioning direction is perpendicular to the front-to-back direction and the clamping direction of the blade clamping part.

[0021] The beneficial effect of the above technical solution is that the second concave-convex positioning structure is provided to position the blade, so that the blade is fixed more firmly and the blade is prevented from shaking.

[0022] Furthermore, the rear side surface of the blade is inclined from front to rear toward the pressing portion so that a wedge surface fit is formed between the blade and the fixing portion.

[0023] The beneficial effect of the above technical solution is that the pressing part can press the rear side of the blade against the fixed part, so that the fixed part generates a backward friction component force on the blade, limiting the blade from sliding forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0025] Figure 1 A schematic diagram of the structure of a slotting tool with a chip breaker block provided by the utility model Figure 1 ;

[0026] Figure 2 A schematic diagram of the structure of a slotting tool with a chip breaker block provided by the utility model Figure 2 ;

[0027] Figure 3 A schematic diagram of the structure of a slotting tool with a chip breaker block provided by the utility model Figure 3 ;

[0028] Figure 4 A schematic diagram of the structure of a slotting tool with a chip breaker block provided by the utility model Figure 4 ;

[0029] Figure 5 A schematic structural diagram of a cutter body in a slotting cutter with a chip breaker block provided by the utility model;

[0030] Figure 6 A schematic structural diagram of a blade in a slotting tool with a chip breaker block provided by the utility model;

[0031] Figure 7 It is a structural schematic diagram of a slotting tool in the prior art.

[0032] Description of reference numerals:

[0033] 1. Cutter body; 2. Cutter head; 201. Front cutting edge; 202. Arc segment; 203. Straight segment; 3. Blade clamping portion; 4. Chip breaker block clamping portion; 5. Chip breaker block; 6. Blade clamping bolt; 7. Clamping bolt; 8. First dividing groove; 9. Second dividing groove; 10. First stress relief hole; 11. Second stress relief hole; 12. Blade mounting groove; 13. Through hole; 14. Cutter rod; 15. Chip breaker column. DETAILED DESCRIPTION

[0034] 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. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0035] The following is one embodiment of a slotting tool with a chip breaker block provided by the utility model:

[0036] like Figure 1 and Figure 2 As shown, a slotting tool with a chip breaker block includes a tool body 1 and a blade. Figure 6 As shown, the blade includes a blade head 2 located at the front side and a blade rod 14 connected to the rear side of the blade head 2. The top surface of the blade head 2 is a front blade surface 201, and the front end of the front blade surface 201 is the blade edge. Figure 3 As shown, the edge of the blade includes a semicircular arc segment 202 and two straight line segments 203 respectively located at two ends of the arc segment 202 and tangent to the arc segment 202 .

[0037] like Figure 5 As shown, the front end of the blade body 1 includes a fixed part and a pressing part, and a second dividing groove 9 is provided between the fixed part and the pressing part. A second stress relief hole 11 communicating with the second dividing groove 9 is provided at the rear end of the second dividing groove 9, and the aperture size of the second stress relief hole 11 is larger than the groove width size of the second dividing groove 9. A blade mounting groove 12 is provided at the front end of the fixed part, and the blade is placed in the blade mounting groove 12. The groove bottom of the blade mounting groove 12 is V-shaped to form a second positioning concave part, and the bottom of the blade is also V-shaped to form a second positioning convex part. The second positioning concave part is plugged and matched with the second positioning convex part to form a second concave-convex positioning structure to limit the sliding of the blade.

[0038] The clamping part includes a blade clamping part 3 and a chip breaker block clamping part 4. A first dividing groove 8 is provided between the blade clamping part 3 and the chip breaker block clamping part 4. A first stress relief hole 10 connected to the first dividing groove 8 is provided at the rear end of the first dividing groove 8. The aperture size of the first stress relief hole 10 is larger than the groove width size of the first dividing groove 8. The front end of the blade clamping part 3 extends above the tool rod 14. A blade clamping bolt 6 is passed through the blade clamping part 3. The blade clamping bolt 6 is screwed on the fixing part so that the front end of the blade clamping part 3 is pressed on the tool rod 14.

[0039] A V-shaped groove is provided at the top of the knife rod 14, which forms a first positioning recess. A V-shaped protrusion is provided at the bottom of the front end of the blade pressing part 3, which forms a first positioning convex portion. The first positioning convex portion and the first positioning concave portion are plugged into each other to form a first concave-convex positioning structure to further limit the sliding of the blade.

[0040] The rear side of the blade is an inclined surface inclined from front to back toward the blade pressing part. The rear side of the blade fits on the corresponding groove wall in the blade installation groove to form a wedge surface fit between the rear side of the blade and the fixing part.

[0041] The front end of the chip breaker block clamping part 4 forms a chip breaker block 5, which extends to the top of the cutter head. The chip breaker block clamping part 4 is provided with a chip breaker block clamping bolt 7, which passes through the chip breaker block clamping part 4 and is screwed on the blade clamping part 3, so that the chip breaker block 5 is pressed against the front cutting surface 201 on the cutter head 2. A through hole 13 is provided on the chip breaker block clamping part 4 at a position corresponding to the penetration position of the blade clamping bolt 6, and the through hole 13 is used for the blade clamping bolt 6 to pass through, and does not affect the installation of the blade clamping bolt 6.

[0042] There is a gap between the front end edge of the chip breaker block 5 and the front end edge of the blade. The front end edge of the chip breaker block 5 is in a parabolic shape with its opening facing backwards, so that the width of the gap decreases from front to back.

[0043] The above-mentioned fixing part, chip breaker block pressing part 4, chip breaker block 5 and blade pressing part 3 are integrally formed.

[0044] When the utility model is used, the grooving cutter is installed at the tool clamping position on the machine tool, and the workpiece is cut. The chips generated by the cutting edge of the blade cutting the workpiece collide with the chip breaker block 5 and break, thereby preventing long iron chips from wrapping around the tool. When the processing surface is a curved surface, more areas in the chip breaker block 5 can collide with the chips, and the chip breaking effect is better. When the blade is worn and needs to be replaced, it is only necessary to loosen the blade clamping bolt 6 and the clamping bolt 7 to keep the blade clamping part 3 away from the tool rod 14 and the chip blocking block away from the cutter head 2, and then the blade can be removed from the blade mounting groove 12, and then a new blade is placed in the blade mounting groove 12, and then the blade clamping bolt 6 is tightened to press the blade clamping part 3 on the tool rod 14, and the clamping bolt 7 is tightened to press the chip breaker block 5 on the front cutting surface 201 on the cutter head 2, and the assembly of the new blade is completed.

[0045] The utility model has a better chip breaking effect when processing a curved surface on a workpiece, and the blade of the utility model is easier to assemble and disassemble, and the replacement efficiency is higher when the blade is worn.

[0046] In this embodiment, the front end edge of the chip breaker block is in a parabolic shape with its opening facing backwards. In other embodiments, the front end edge of the chip breaker block may also be semicircular. In this case, the center of the front end edge of the chip breaker block should be located on the rear side of the center of the arc segment of the blade.

[0047] In this embodiment, the first positioning concave portion and the first positioning convex portion are both V-shaped. In other embodiments, the first positioning concave portion and the first positioning convex portion are both hemispherical.

[0048] In this embodiment, the second positioning concave portion and the second positioning convex portion are both V-shaped. In other embodiments, the second positioning concave portion and the second positioning convex portion are both hemispherical.

Claims

1. A slotting tool with a chip breaker, comprising: A knife body, wherein a blade is provided at the front end of the knife body; A chip breaker block is provided on the cutter body, and the chip breaker block is located on a side of the blade used for cutting; The invention is characterized in that the chip breaker block and the blade are arranged separately, there is a gap between the edge of the chip breaker block and the edge of the blade, and the width of the gap decreases from front to back.

2. A slotting tool with a chip breaker block according to claim 1, characterized in that: The edge of the blade includes a semicircular arc segment, and the front end edge of the chip breaker block is in a parabolic shape with an opening facing backwards, so that the width of the interval decreases from front to back.

3. A slotting tool with a chip breaker block according to claim 1 or 2, characterized in that: The chip breaking block is integrally formed on the cutter body.

4. A slotting tool with a chip breaker block according to claim 1 or 2, characterized in that: The front end of the cutter body includes a fixing part and a pressing part, a second dividing groove is provided between the fixing part and the pressing part, the pressing part is elastic, and is used to press the blade and the chip breaker block onto the fixing part.

5. A slotting tool with a chip breaker block according to claim 4, characterized in that: The pressing part includes a blade pressing part and a chip breaker block pressing part, the front end of the blade pressing part is used to press the blade onto the fixing part, the front end of the chip breaker block pressing part is used to press the chip breaker block onto the blade, a first separation groove is provided between the blade pressing part and the chip breaker block pressing part, and the front end of the chip breaker block pressing part extends to the front of the blade pressing part; The slotting tool comprises a blade clamping bolt which penetrates the blade clamping part and the chip breaker block clamping part and is screwed in the fixing part, and also comprises a chip breaker block clamping bolt which penetrates the chip breaker block clamping part and is screwed on the blade clamping part.

6. A slotting tool with a chip breaker according to claim 5, characterized in that: A first concave-convex positioning structure is provided on the opposite sides of the blade and the blade pressing part. The first concave-convex positioning structure includes a first positioning recess provided on one of the blade and the blade pressing part, and a first positioning protrusion provided on the other. The first positioning recess and the first positioning protrusion cooperate with each other to position the blade, and the positioning direction is perpendicular to the front-to-back direction and the pressing direction of the blade pressing part.

7. A slotting tool with a chip breaker according to claim 5, characterized in that: A second concave-convex positioning structure is provided on the opposite sides of the blade and the fixed part. The second concave-convex positioning structure includes a second positioning recess provided on one of the blade and the fixed part, and a second positioning protrusion provided on the other. The second positioning recess and the second positioning protrusion cooperate with each other to position the blade, and the positioning direction is perpendicular to the front-to-back direction and the clamping direction of the blade clamping part.

8. A slotting tool with a chip breaker block according to claim 4, characterized in that: The rear side surface of the blade is inclined from front to rear toward the pressing part so that a wedge surface fit is formed between the blade and the fixing part.

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