Milling and reaming integrated cutter with staggered teeth

Abstract

The utility model relates to the technical field of machining cutters, and aims to solve the technical problems of obvious cutter vibration lines and poor surface roughness. In order to solve the technical problem, the utility model provides the staggered-tooth milling and reaming integrated cutter. According to the utility model, a first processing part is provided with a first processing blade; the second machining part is provided with a second machining blade set, and the radius of a main blade of the second machining blade set is larger than that of a secondary blade. The secondary cutting edges of the two second machining blades are opposite in direction; the sum of the lengths of the main cutting edge and the secondary cutting edge is the width of the groove body; the length of the main cutting edge is greater than 1 / 2 of the width of the groove body; the cutter bar part, the first machining part and the second machining part are sequentially and coaxially connected from back to front, and the radius of the first machining blade is larger than that of the second machining blade. In the axis direction, the distance between the first machining blade and the second machining blade is larger than the distance between the groove body and the end face of the to-be-machined part. According to the utility model, cutter vibration lines are reduced, and the surface roughness is good.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, and in particular to an integrated milling and reaming tool with staggered teeth. Background Technology

[0002] Holes need to be machined on the workpiece, and then grooves need to be machined on one side of the holes. Current technology often uses two cutting tools to complete this process: one tool for reaming and the other for milling the groove (i.e., machining the groove itself). This method results in low processing efficiency, noticeable chatter marks in the groove, and poor surface roughness. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the above-mentioned problems existing in the prior art.

[0004] To solve the above technical problems, this utility model provides an integrated milling and reaming cutter with staggered teeth, comprising:

[0005] Tool holder section;

[0006] The first processing section is equipped with the first processing blade;

[0007] The second processing unit is provided with at least one set of second processing blades. The second processing blade set includes two second processing blades, each including a main cutting edge and a secondary cutting edge. The radius of the main cutting edge is greater than the radius of the secondary cutting edge. The secondary cutting edges of the two second processing blades are in opposite directions. The sum of the lengths of the main cutting edge and the secondary cutting edge is the groove width of the workpiece to be processed, and the length of the main cutting edge is greater than 1 / 2 of the groove width.

[0008] The tool holder, the first machining section, and the second machining section are coaxially connected in sequence. The radius of the first machining blade is greater than the radius of the second machining blade. Along the axial direction, the distance between the first machining blade and the second machining blade is greater than the distance between the groove and the end face of the workpiece.

[0009] Furthermore, there are multiple first machining blades, which are evenly distributed circumferentially.

[0010] Furthermore, there are multiple second machining blade groups, and the secondary cutting edges of two adjacent second machining blades are in opposite directions.

[0011] Furthermore, the length of the main cutting edge is 2 / 3 of the width of the groove, and the length of the secondary cutting edge is 1 / 3 of the width of the groove.

[0012] Furthermore, a beveled transition is used between the main cutting edge and the secondary cutting edge.

[0013] Furthermore, the first machining section is provided with a first chip removal groove, and the first machining blade is provided in a one-to-one correspondence with the first chip removal groove. The first machining blade is installed in the first chip removal groove.

[0014] And / or, the second machining section is provided with a second chip removal groove, and the second machining blade is provided in a one-to-one correspondence with the second chip removal groove, and the second machining blade is installed in the second chip removal groove.

[0015] Furthermore, this application also includes a central water outlet extending along the axial direction, the central water outlet being used to output cutting fluid to the first machining blade and / or the second machining blade.

[0016] Furthermore, the front end of the water outlet center hole penetrates the tool holder and the first machining part and extends into the second machining part; the first machining part is provided with a first cooling hole that penetrates its wall thickness, and the first cooling hole connects the water outlet center hole and the first machining blade;

[0017] The second machining section is provided with a second cooling hole that penetrates its wall thickness. The second cooling hole is connected to the water outlet center hole and the second machining blade.

[0018] Furthermore, the first and / or second machining inserts are made of PCD.

[0019] Furthermore, the tail end of the tool holder is connected to the spindle tool holder of the machining equipment, with a connection length of not less than 30mm.

[0020] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0021] The staggered-tooth milling and reaming integrated cutter of this utility model has a first machining part for hole machining and a second machining part for groove milling, thereby realizing hole reaming and groove milling with a single tool, reducing tool changes and improving machining efficiency; it also saves on the number of tools and reduces the risk of insufficient tool magazine capacity. Furthermore, the second machining insert of this application is divided into a main cutting edge and a secondary cutting edge, and the secondary cutting edges of the two second machining inserts are staggered, thereby reducing the contact area between the second machining insert and the workpiece during cutting while ensuring machining quality, reducing the stress on the second machining insert, thus avoiding or reducing resonance, thereby reducing vibration marks and ensuring the surface roughness of the machined holes and grooves. Secondly, the secondary cutting edge of this application has a roughing function, which further reduces the cutting resistance of the main cutting edge and improves machining efficiency. Attached Figure Description

[0022] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of a staggered tooth milling and reaming integrated cutter according to a preferred embodiment of the present invention;

[0024] Figure 2 yes Figure 1 Enlarged view of point A of the staggered tooth milling and reaming cutter;

[0025] Figure 3 yes Figure 1 Front view of a toothed milling and reaming cutter;

[0026] Figure 4 yes Figure 3 CC section view;

[0027] Figure 5 yes Figure 1 Side view of a staggered tooth milling and reaming cutter;

[0028] Figure 6 yes Figure 1 A schematic diagram of the structure of the second machining insert in a staggered tooth milling and reaming cutter;

[0029] Figure 7 Is adopted Figure 1 A schematic diagram of machining using a staggered tooth milling and reaming integrated cutter;

[0030] Explanation of reference numerals in the accompanying drawings: 100, tool holder;

[0031] 200, First machining section; 210, First machining blade; 220, First chip removal groove; 230, First cooling hole;

[0032] 300. Second machining section; 310. Second machining insert; 311. Main cutting edge; 312. Secondary cutting edge; 313. Bevel angle; 320. Second chip removal groove; 330. Second cooling hole;

[0033] 400. Center outlet hole;

[0034] 500, part to be processed; 510, hole; 520, groove. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0036] Reference Figures 1-6 As shown, this utility model embodiment provides a staggered tooth milling and reaming integrated cutter, comprising:

[0037] Tool holder 100; the tail end of the tool holder 100 is connected to the tool holder of the machine tool spindle and moves under the control of the machine tool spindle;

[0038] The first processing unit 200 is equipped with a first processing blade 210;

[0039] The second machining section 300 is provided with at least one set of second machining blades 310. Each set of second machining blades 310 includes two second machining blades 310, each blade 310 having a main cutting edge 311 and a secondary cutting edge 312. The radius of the main cutting edge 311 is greater than the radius of the secondary cutting edge 312 (radius refers to the distance between the main cutting edge 311 or the secondary cutting edge 312 and the axis of the second machining section 300). The secondary cutting edges 312 of the two second machining blades 310 are in opposite directions (i.e., the two second machining blades 310 are staggered), meaning that the secondary cutting edge 312 of one second machining blade 310 faces the front end, while the secondary cutting edge 312 of the other second machining blade 310 faces the rear end. The sum of the lengths of the main cutting edge 311 and the secondary cutting edge 312 is the groove width B of the groove, and the length L1 of the main cutting edge 311 is greater than 1 / 2 of the groove width B.

[0040] The tool holder 100, the first machining part 200, and the second machining part 300 are coaxially connected in sequence. The radius of the first machining blade 210 is greater than the radius of the second machining blade 310 (that is, the distance of the cutting edge of the first machining blade 210 from the axis is greater than the distance of the main cutting edge 311 from the axis). Along the axial direction, the distance L2 between the first machining blade 210 and the second machining blade 310 is greater than the distance L5 between the groove 520 and the end face of the workpiece.

[0041] It should be noted that, referring to Figure 7 As shown, this application enters the workpiece 500 from its outer end, and then the first machining blade 210 processes the hole 510 in the workpiece 500 (since the radius of the first machining blade 210 is larger than the radius of the second machining blade 310, the first machining blade 210 does not perform processing at this time). After the hole 510 is processed, this application retracts, and then the second machining blade 310 processes the groove 520 at the corresponding position in the hole 510 (since the distance L2 between the first machining blade 210 and the second machining blade 310 is greater than the distance L5 between the groove and the end face of the workpiece, the first machining blade 210 has retracted outside the workpiece 500 and does not perform processing at this time).

[0042] Specifically, the first machining section 200 of this application performs hole machining, and the second machining section 300 can mill grooves, thereby achieving hole reaming and groove milling with a single tool, reducing tool changes and improving machining efficiency; it also saves on the number of tools and reduces the risk of insufficient tool magazine capacity. Furthermore, the second machining insert 310 of this application is divided into a main cutting edge 311 and a secondary cutting edge 312, and the secondary cutting edges 312 of the two second machining inserts 310 are staggered, thereby reducing the area between the second machining insert 310 and the workpiece 500 during cutting while ensuring machining quality, reducing the force on the second machining insert 310, thus avoiding or reducing resonance, reducing vibration marks, and ensuring the surface roughness of the machined holes and grooves. Secondly, the secondary cutting edge 312 of this application has a roughing function, which further reduces the cutting resistance of the main cutting edge 311 and improves machining efficiency.

[0043] Furthermore, there are multiple first machining blades 210, which are evenly distributed circumferentially. For example, there are two first machining blades 210, and the included angle between the two first machining blades 210 is 180 degrees. Specifically, in this embodiment, the use of multiple first machining blades 210 can improve machining efficiency.

[0044] Furthermore, there are multiple sets of second machining blades 310, with the secondary cutting edges 312 of adjacent second machining blades 310 facing opposite directions. In some embodiments, the multiple second machining blades 310 are evenly distributed circumferentially. For example, if two sets of second machining blades 310 are included, then there are four second machining blades 310, which are evenly distributed circumferentially, i.e., the included angle between adjacent second machining blades 310 is 90°. Specifically, the provision of multiple sets of second machining blades 310 in this embodiment can improve machining efficiency.

[0045] Furthermore, the length L1 of the main cutting edge 311 is 2 / 3 of the groove width B, and the length L3 of the secondary cutting edge 312 is 1 / 3 of the groove width B. Specifically, this embodiment ensures that the main cutting edges 311 of the two second processing blades 310 in each group of second processing blades 310 have an overlap of 1 / 3 of the groove width B, avoiding the formation of tool marks and excess material in the middle of the groove during processing, thereby ensuring the quality of the groove wall.

[0046] Furthermore, a bevel angle 313 is used to transition between the main cutting edge 311 and the secondary cutting edge 312. Specifically, this application uses a bevel angle 313 to transition between the main cutting edge 311 and the secondary cutting edge 312, thereby enabling the smooth transfer of stress between the main cutting edge 311 and the secondary cutting edge 312 after being subjected to force during the cutting process.

[0047] Furthermore, the first machining section 200 is provided with a first chip removal groove 220, and a first machining blade 210 is correspondingly arranged in the first chip removal groove 220 and installed in the first chip removal groove 220. The second machining section 300 is provided with a second chip removal groove 320, and a second machining blade 310 is correspondingly arranged in the second chip removal groove 320 and installed in the second chip removal groove 320. Specifically, the second chip removal groove 320 and the first chip removal groove 220 provided in this embodiment facilitate the discharge of chips generated during machining.

[0048] Furthermore, this application also includes a central water outlet hole 400 extending along the axial direction, the central water outlet hole 400 being used to output cutting fluid to the first machining blade 210 and the second machining blade 310. In some embodiments, the front end of the central water outlet hole 400 penetrates the tool holder portion 100 and the first machining portion 200 and extends into the second machining portion 300; the first machining portion 200 is provided with a first cooling hole 230 penetrating its wall thickness, the first cooling hole 230 connecting the central water outlet hole 400 and the first machining blade 210; for example, each first machining blade 210 is provided with a corresponding first cooling hole 230. The second machining portion 300 is provided with a second cooling hole 330 penetrating its wall thickness, the second cooling hole 330 connecting the central water outlet hole 400 and the second machining blade 310; for example, each second machining portion 300 is provided with a corresponding second cooling hole 330.

[0049] Specifically, this embodiment facilitates the delivery of cutting fluid to the first machining insert 210 through the central water outlet 400 and the first cooling hole 230, thereby lubricating, cooling, and flushing away debris from the first machining insert 210. Similarly, this embodiment facilitates the delivery of cutting fluid to the second machining insert 310 through the central water outlet 400 and the second cooling hole 330, thereby lubricating, cooling, and flushing away debris from the second machining insert 310. Therefore, this embodiment improves machining efficiency and extends the lifespan of both the first and second machining inserts 210.

[0050] Furthermore, the first machining insert 210 and / or the second machining insert 310 are made of PCD. Other parts of the tool holder 100, the first machining section 200, and the second machining section 300 are made of cemented carbide. Specifically, PCD material has advantages such as high hardness, high wear resistance, good thermal stability, high thermal conductivity, high impact resistance, and good chemical stability. This embodiment uses PCD material for the first machining insert 210 and the second machining insert 310, thereby improving the service life of the first machining insert 210 and the second machining insert 310 and increasing machining accuracy. In addition, other components are made of cemented carbide, reducing costs. Therefore, this application can improve the service life and machining accuracy of the inserts while ensuring the disclosed cost.

[0051] Furthermore, the tail end of the tool holder 100 is connected to the spindle tool holder of the machining equipment, with a connection length L4 of not less than 30mm. Specifically, the 30mm connection length ensures the stability of the connection, avoids shaking during machining, and thus improves machining accuracy.

[0052] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A combined rabbet and hinge milling cutter, characterized by: The utility model relates to a cutting tool, including: a cutter bar part; a first machining part provided with a first machining blade; a second machining part provided with at least one second machining blade group, the second machining blade group includes two second machining blades, the second machining blades include a main cutting edge and a secondary cutting edge, the radius of the main cutting edge is greater than the radius of the secondary cutting edge; the directions of the secondary cutting edges of the two second machining blades are opposite; the sum of the lengths of the main cutting edge and the secondary cutting edge is the width of a groove of a workpiece to be machined, and the length of the main cutting edge is greater than 1 / 2 of the groove width; wherein the cutter bar part, the first machining part and the second machining part are coaxially connected in sequence, the radius of the first machining blade is greater than the radius of the second machining blade; along the axial direction, the distance between the first machining blade and the second machining blade is greater than the distance from the groove to the end surface of the workpiece to be machined.

2. The hybrid cutter of claim 1, wherein: The first machining blade is a plurality of first machining blades, and the plurality of first machining blades are uniformly distributed in the circumferential direction.

3. The hybrid cutter of claim 1, wherein: The second machining blade group is a plurality of second machining blade groups, and the directions of the secondary cutting edges between adjacent two second machining blades are opposite.

4. The hybrid cutter of claim 1, wherein: The length of the main cutting edge is 2 / 3 of the groove width, and the length of the secondary cutting edge is 1 / 3 of the groove width.

5. The hybrid cutter of claim 1, wherein: An oblique angle is used between the main cutting edge and the secondary cutting edge.

6. The hybrid cutter of claim 1, wherein: A first chip removal groove is formed on the first machining part, the first machining blade is one-to-one corresponding to the first chip removal groove, and the first machining blade is installed in the first chip removal groove. And / or, a second chip removal groove is provided on the second machining part, the second machining blade is one-to-one corresponding to the second chip removal groove, and the second machining blade is installed in the second chip removal groove.

7. The hybrid cutter of claim 1, wherein: It also includes a water outlet center hole extending along the axial direction, which is used to output chip removal fluid to the first machining blade and / or the second machining blade.

8. The hybrid cutter of claim 7, wherein: The front end of the water outlet center hole penetrates the cutter bar part, the first machining part and extends into the second machining part; the first machining part is provided with a first cooling hole penetrating the wall thickness thereof, and the first cooling hole communicates the water outlet center hole and the first machining blade; The second machining part is provided with a second cooling hole penetrating the wall thickness thereof, and the second cooling hole communicates the water outlet center hole and the second machining blade.

9. The hybrid cutter of claim 1, wherein: The first machining blade and / or the second machining blade is made of PCD.

10. The hybrid cutter of claim 1, wherein: The tail end of the cutter bar part is connected with the main shaft tool holder of the machining equipment, and the connection length is not less than 30mm.

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