Integrally-formed cutter suitable for section difference hole machining

Abstract

The utility model belongs to the technical field of cutters, particularly relates to an integrally-formed cutter suitable for segment difference hole machining, and aims to solve the problems that the length of a cutter body of an existing cutter suitable for segment difference hole machining is inconvenient to adjust in the using process; in order to solve the problem that only a segment difference hole workpiece with a fixed width or length can be machined during machining, the following scheme is provided: the cutter comprises a cutter bar, a first cutting part fixedly mounted above the cutter bar and an extension structure arranged in the first cutting part; according to the cutting device, the arranged sliding block is connected with the connecting rod of the extending structure, the sliding block is manually pulled, and the connecting rod on one side of the sliding block slides in the sliding groove in the cutter bar, so that the connecting rod can pull the second cutting part on the upper portion in the sliding process; therefore, the distance between the first cutting part and the second cutting part is adjusted, and segment difference hole workpieces with different widths or lengths can be conveniently machined.

Description

Technical Field

[0001] The utility model relates to a forming tool, in particular to an integrally formed tool suitable for stepped hole machining, belonging to the technical field of tools. Background Technique

[0002] Stepped holes usually refer to the stepped or stepped differences inside the holes, which may be due to design requirements or generated during the machining process. The machining of stepped holes is crucial for ensuring the functions and precision of parts. The machining of stepped holes usually requires the use of special tools, such as integral tools. This tool has a unique design and can simultaneously achieve multiple functions such as drilling, reaming, etc. The drill tip part of the tool usually adopts a double vertex angle form, while the tool body part includes multiple stepped drills to adapt to the machining of stepped holes with different depths.

[0003] In the prior art, for example, an internal hole empty cutter groove and internal hole machining tool with an ultra-large step difference disclosed in the patent No. CN218425665U includes a blade and a tool handle connected to each other. The comma-shaped blade includes a connecting part at the upper part and a cutting part at the lower tip. The tool is an integral tool, and the blade and the tool handle of the integral tool are of an integral structure. The tool handle is connected to the tool sleeve through a plug. It uses the intersection of eccentric circles and olive shapes to make the avoidance connection part. At the same time, the cutting edge of the utility model adopts a comma shape, which is also different from the shape of the current internal hole tools. These two differences above make it resist stress concentration and increase the strength of the cutting edge and the avoidance part.

[0004] However, during actual use, when using the above-mentioned internal hole empty cutter groove and internal hole machining tool with an ultra-large step difference, although it can achieve the strength of the cutting edge and the avoidance part through the comma shape of the cutting edge and the structural connection method different from traditional tools, since the tool is an integral tool and the blade and the tool handle are of an integral structure, when machining stepped hole workpieces, it can only machine workpieces with a single length or width, and its machining range is relatively single. Content of the Utility Model

[0005] The utility model provides an integrally formed tool suitable for stepped hole machining to solve the problem that when using the above-mentioned internal hole empty cutter groove and internal hole machining tool with an ultra-large step difference, although it can achieve the strength of the cutting edge and the avoidance part through the comma shape of the cutting edge and the structural connection method different from traditional tools, since the tool is an integral tool and the blade and the tool handle are of an integral structure, when machining stepped hole workpieces, it can only machine workpieces with a single length or width, and its machining range is relatively single.

[0006] The present utility model realizes the above object through the following technical solutions: An integrally formed cutting tool suitable for machining stepped holes, comprising a tool shank, a first cutting portion fixedly installed above the tool shank, and an extending structure disposed inside the first cutting portion, and a second cutting portion fixedly installed above the extending structure;

[0007] The extending structure includes a connecting rod, one side of the connecting rod is fixedly installed with a slider, and the side of the slider away from the connecting rod penetrates through the tool shank. Positioning holes are formed on the outer side of the connecting rod, and multiple groups of limiting holes are formed at the corresponding positions of the tool shank and the positioning holes.

[0008] As a further scheme of the present utility model: A chute matching the connecting rod is formed at the connection between the tool shank and the connecting rod. The chute is formed inside the tool shank, and a guiding chute matching the slider is formed at the connection between the tool shank and the slider.

[0009] As a further scheme of the present utility model: The first cutting portion includes a first tool body, multiple groups of first helical cutting edges are arranged on the outer side of the first tool body, and multiple groups of first straight cutting edges are arranged above the first helical cutting edges.

[0010] As a further scheme of the present utility model: Multiple groups of the first straight cutting edges are spirally arranged on the outer side of the first tool body, and a first chip removal groove is formed between adjacent two groups of the first straight cutting edges.

[0011] As a further scheme of the present utility model: The second cutting portion includes a second tool body, the second tool body is of a conical structure, multiple groups of second straight cutting edges are arranged on the outer side of the second tool body, and the second straight cutting edges are spirally arranged on the outer side of the second tool body. Multiple groups of second helical cutting edges are arranged on the outer side of the connecting rod at the end of the second cutting portion.

[0012] As a further scheme of the present utility model: A diversion pipe is fixedly installed inside the chute. A communication structure is formed between the diversion pipe and the tool shank. A diversion groove matching the diversion pipe is formed at the connection between the connecting rod and the diversion pipe. The diversion groove is formed inside the connecting rod.

[0013] As a further scheme of the present utility model: Multiple groups of cooling cavities are formed inside the connecting rod. One end of the cooling cavity extends into the second cutting portion, and a liquid discharge port is connected to one end of the cooling cavity. The liquid discharge port is formed on the outer side of the second cutting portion. A communication structure is formed among the cooling cavity, the diversion groove and the diversion pipe.

[0014] The beneficial effects of the present utility model are:

[0015] Connect the connecting rod of the extension structure through the set slider, and manually pull the slider and the connecting rod on one side of the slider to slide inside the internal chute of the tool bar, so that the connecting rod can pull the upper second cutting part during the sliding process, thereby adjusting the distance between the first cutting part and the second cutting part. In this way, the distance between the first cutting part and the second cutting part can be adjusted according to the needs of the stepped hole workpiece;

[0016] The conical structure of the second cutting part and the second straight edge of the second cutting part are set to achieve the effect of opening a hole in the stepped hole workpiece during the use of the one-piece forming tool. During the continuous processing, the second spiral edge of the connecting rod at the second cutting part can achieve the effect of rough expanding the hole between the openings of the second cutting part. When the first cutting part is located at the processing position of the second cutting part, the first cutting part can achieve the effect of fine expanding the hole of the workpiece through the first spiral edge and the first straight edge. Brief Description of the Drawings

[0017] Figure 1 Schematic diagram of the overall structure of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the second cutting part of the present invention;

[0019] Figure 3 Schematic diagram of the structure of the first cutting part of the present invention;

[0020] Figure 4 Schematic diagram of the structure of the first cutting part and the internal section of the tool bar of the present invention.

[0021] In the figure: 1, tool bar; 2, first cutting part; 3, extension structure; 301, connecting rod; 302, slider; 4, second cutting part; 5, chute; 6, guiding chute; 7, first tool body; 8, first spiral edge; 9, first straight edge; 10, first chip removal groove; 11, second tool body; 12, second straight edge; 13, second spiral edge; 14, diversion pipe; 15, diversion groove; 16, liquid discharge port. Detailed Description of the Invention

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0023] As Figures 1 to 4As shown in the figure, an integrally formed tool suitable for machining stepped holes includes a tool shank 1, a first cutting part 2 fixedly installed above the tool shank 1, and an extension structure 3 arranged inside the first cutting part 2. A second cutting part 4 is fixedly installed above the extension structure 3, and the diameter of the first cutting part 2 is larger than that of the second cutting part 4;

[0024] The extension structure 3 includes a connecting rod 301. The connecting rod 301 is slidably installed inside the first cutting part 2 and the tool shank 1. A slider 302 is fixedly installed on one side of the connecting rod 301, and the side of the slider 302 away from the connecting rod 301 penetrates through the tool shank 1. Positioning holes are formed on the outer side of the connecting rod 301, and multiple groups of limiting holes are formed at the corresponding positions of the tool shank 1 and the positioning holes.

[0025] A chute 5 matching the connecting rod 301 is formed at the connection between the tool shank 1 and the connecting rod 301. The chute 5 is formed inside the tool shank 1, and a guiding chute 6 matching the slider 302 is formed at the connection between the tool shank 1 and the slider 302. Embodiment

[0026] In this embodiment, in addition to including all the technical features in Embodiment 1, it further includes:

[0027] The first cutting part 2 includes a first blade body 7. Multiple groups of first spiral blades 8 are arranged on the outer side of the first blade body 7. Multiple groups of first straight blades 9 are arranged above the first spiral blades 8. The multiple groups of first straight blades 9 are spirally arranged on the outer side of the first blade body 7. A first chip removal groove 10 is formed between adjacent two groups of first straight blades 9. The first straight blades 9 on the outer side of the first cutting part 2 can achieve the first fine machining of the hole after the second spiral blade 13 completes the preliminary rough expansion of the hole, and can achieve the effect of fine expansion of the processed hole. As the first cutting part 2 continuously penetrates into the processing hole, the first spiral blades 8 below the first straight blades 9 perform the second fine machining on the processing hole after the first straight blades 9 expand the hole.

[0028] The second cutting part 4 includes a second blade body 11. The second blade body 11 has a conical structure. Multiple groups of second straight blades 12 are arranged on the outer side of the second blade body 11. The second straight blades 12 are spirally arranged on the outer side of the second blade body 11. Multiple groups of second spiral blades 13 are arranged on the outer side of the connecting rod 301 at the end of the second cutting part 4. The conical structure of the second cutting part 4 and the second straight blades 12 of the second cutting part 4 achieve the effect of opening the stepped hole workpiece during the use of this integrally formed tool. And as the second cutting part 4 continuously penetrates during the processing, the second spiral blades 13 of the connecting rod 301 at the second cutting part 4 can achieve the rough expansion effect of the hole after the second cutting part 4 opens the hole.

[0029] A diversion pipe 14 is fixedly installed inside the chute 5. The diversion pipe 14 and the tool bar 1 form a communication structure. A diversion groove 15 matching the diversion pipe 14 is provided at the connection between the connecting rod 301 and the diversion pipe 14. The diversion groove 15 is opened inside the connecting rod 301. A plurality of cooling cavities are opened inside the connecting rod 301. One end of the cooling cavity extends into the second cutting part 4, and a liquid discharge port 16 is connected to one end of the cooling cavity. The liquid discharge port 16 is opened on the outer side of the second cutting part 4. The end of the cooling cavity far from the second cutting part 4 is connected to the diversion groove 15, and a communication structure is formed among the cooling cavity, the diversion groove 15 and the diversion pipe 14. The diversion pipe 14 can achieve the transmission effect of external cooling water, and transfer the cooling water to the cooling cavity inside the connecting rod 301 and the second cutting part 4 through the diversion pipe 14 to achieve the cooling effect on the second cutting part 4. As the cooling water is continuously poured in, the cooling water will flow to the liquid discharge port 16 through the cooling cavity, so as to achieve the cooling effect on the outer surface of the second cutting part 4. Moreover, the extrusion effect on the possible residual chips inside the cooling cavity can also be achieved through the circulation of the cooling water.

[0030] Working principle: First, adjust the distance between the first cutting part 2 and the second cutting part 4 of the tool according to the distance between the holes of the stepped hole workpiece to be processed. When adjusting, manually pull the slider 302 and the connecting rod 301 on one side of the slider 302 to slide inside the internal chute 5 and the guiding chute 6 of the tool shank 1, so that the connecting rod 301 can pull the upper second cutting part 4 during the sliding process, thereby adjusting the distance between the first cutting part 2 and the second cutting part 4. In this way, the processing range of the stepped hole workpiece can be increased. When the adjustment of the first cutting part 2 and the second cutting part 4 is completed, a columnar object for fixing both can be inserted into the corresponding limit hole and positioning hole to fix the connecting rod 301. Then, during the use of the tool, the conical structure of the second cutting part 4 and the second straight edge 12 of the second cutting part 4 can open the hole of the stepped hole workpiece. When the hole opening is completed, the second cutting part 4 continues to deepen the processing until the corresponding position at the other end. During the continuous deepening process of the second cutting part 4, the second helical edge 13 of the connecting rod 301 located at the second cutting part 4 can achieve the effect of rough enlarging the hole after the second cutting part 4 opens the hole. And as the second cutting part 4 is located at the other end of the stepped hole workpiece, the first straight edge 9 on the outer side of its first cutting part 2 performs the first fine machining on the hole after the second helical edge 13 completes the preliminary rough enlarging of the hole, and achieves the effect of fine enlarging the processed hole. And as the first cutting part 2 continuously deepens into the processing hole, the first helical edge 8 located below the first straight edge 9 performs the second fine machining on the processing hole after the first straight edge 9 enlarges the hole. Finally, cool water is transmitted to the cooling cavity inside the connecting rod 301 and the second cutting part 4 through the diversion pipe 14 to achieve the cooling effect on the second cutting part 4. And as the cool water is continuously poured in, the cool water will flow to the liquid discharge port 16 through the cooling cavity, thereby achieving the cooling effect on the outer surface of the second cutting part 4, and the extrusion effect of the possible residual waste chips inside the cooling cavity can also be achieved through the circulation of the cool water.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed by the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0032] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrally formed cutting tool suitable for machining stepped holes, characterized in that: It includes a tool shank (1), a first cutting part (2) fixedly installed above the tool shank (1), and an extension structure (3) arranged inside the first cutting part (2). A second cutting part (4) is fixedly installed above the extension structure (3). The extension structure (3) includes a connecting rod (301). A slider (302) is fixedly installed on one side of the connecting rod (301). The side of the slider (302) away from the connecting rod (301) penetrates through the tool shank (1). Positioning holes are formed on the outer side of the connecting rod (301), and multiple groups of limiting holes are formed at the corresponding positions of the tool shank (1) and the positioning holes.

2. The one-piece formed cutter applicable to stepped hole machining according to claim 1, wherein: A chute (5) matching the connecting rod (301) is formed at the connection between the tool shank (1) and the connecting rod (301). The chute (5) is formed inside the tool shank (1). A guiding chute (6) matching the slider (302) is formed at the connection between the tool shank (1) and the slider (302).

3. An integrally formed tool suitable for machining stepped holes according to claim 1, characterized in that: The first cutting part (2) includes a first blade body (7). Multiple groups of first spiral blades (8) are arranged on the outer side of the first blade body (7). Multiple groups of first straight blades (9) are arranged above the first spiral blades (8).

4. An integrally formed tool suitable for machining stepped holes according to claim 3, characterized in that: The multiple groups of first straight blades (9) are arranged in a spiral shape on the outer side of the first blade body (7), and a first chip discharge groove (10) is formed between adjacent two groups of first straight blades (9).

5. An integrally formed cutting tool applicable to the machining of stepped holes according to claim 1, characterized in that: The second cutting part (4) includes a second blade body (11). The second blade body (11) is of a conical structure. Multiple groups of second straight blades (12) are arranged on the outer side of the second blade body (11), and the second straight blades (12) are arranged in a spiral shape on the outer side of the second blade body (11). Multiple groups of second spiral blades (13) are arranged on the outer side of the connecting rod (301) at the end of the second cutting part (4).

6. The one-piece formed cutter applicable to the machining of stepped holes according to claim 2, wherein: A diversion pipe (14) is fixedly installed inside the chute (5). A communicating structure is formed between the diversion pipe (14) and the tool shank (1). A diversion groove (15) matching the diversion pipe (14) is formed at the connection between the connecting rod (301) and the diversion pipe (14). The diversion groove (15) is formed inside the connecting rod (301).

7. An integrally formed cutting tool applicable to stepped hole machining according to claim 6, characterized in that: Multiple groups of cooling cavities are formed inside the connecting rod (301). One end of the cooling cavity extends into the second cutting part (4), and a liquid discharge port (16) is connected to one end of the cooling cavity. The liquid discharge port (16) is formed on the outer side of the second cutting part (4). A communicating structure is formed among the cooling cavity, the diversion groove (15), and the diversion pipe (14).

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