Outer chip removal type inner hole threaded cutter bar

Abstract

The utility model discloses an outer chip removal type inner hole threaded cutter bar which comprises a cutter handle and a threaded blade, and the cutter handle comprises a connecting section fixedly connected with a cutter holder and an assembling section used for assembling the threaded blade. A cutting groove is formed in the assembling section and penetrates through the cutter handle in the radial direction of the cutter handle in the left-right direction, and a chip blocking piece is fixedly arranged in front of the cutting groove. The bottom of the cutting groove is provided with an assembling flat wall, the assembling flat wall is provided with a sunken blade groove used for assembling the threaded blade, the threaded blade is provided with an alignment side wall, the blade groove is provided with a positioning groove wall matched with the alignment side wall in an attached mode, and a preset angle is formed between the positioning groove wall and the center axis of the cutter handle. A receding notch for the cutting edge of the threaded blade to stretch out is formed between the positioning groove wall and the chip blocking piece. The chip blocking piece is arranged at the front end of the cutter handle, so that metal chips can be discharged outwards, and cleaning is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of turning tools, and in particular relates to an external chip removal type inner hole threaded tool rod. Background Art

[0002] An internal thread cutter bar is required when processing internal hole threads or internal threads of cylinder bottle mouths. The internal thread cutter bar is mostly composed of a tool handle and a thread blade. The tool handle is fixedly assembled on the tool holder, and the thread blade is fixedly assembled on the end of the tool handle. The thread cutter bar will produce metal chips in the process of processing the internal threads. The metal chips deep in the inner hole are not easy to be discharged, which affects the quality of the workpiece. Especially when processing the internal threads of the cylinder bottle mouth, during the high-speed rotation of the internal thread cutter bar, some metal chips will remain at the bottle mouth, and some metal chips will enter the bottle body. The metal chips at the bottle mouth are easier to clean, but the metal chips inside the bottle body are difficult to clean. The cleaning process is time-consuming and labor-intensive, and it is not easy to clean up, which affects the quality of the cylinder. Summary of the invention

[0003] The utility model aims to provide an external chip removal type internal thread cutter bar for processing internal thread and bottle mouth internal thread in the prior art, in order to solve the problem that metal chips easily enter the interior of the workpiece and are difficult to be discharged, which affects the quality of the workpiece.

[0004] The invention objective of the utility model is achieved through the following technical solutions:

[0005] An external chip removal internal hole threaded tool rod, which includes a tool holder and a threaded blade, the tool holder includes a connecting section fixedly connected to the tool seat, and an assembly section for assembling the threaded blade; the assembly section is provided with a cutting groove, the cutting groove penetrates radially left and right of the tool holder, and a chip stopper is fixed in front of the cutting groove; the bottom of the cutting groove has an assembly flat wall, and an inward-recessed blade groove for assembling the threaded blade is provided on the assembly flat wall, the threaded blade has an alignment side wall, the blade groove has a positioning groove wall that is in close contact with the alignment side wall, and the positioning groove wall forms a predetermined angle with the center axis of the tool holder; there is a clearance gap between the positioning groove wall and the chip stopper for the threaded blade to extend out.

[0006] Preferably, a flat chip-blocking wall is formed on the side of the chip-blocking piece facing the cutting groove, and the flat chip-blocking wall is perpendicular to the central axis of the tool handle.

[0007] Preferably, the cutting groove has an arc-shaped wall at the rear, and the arc-shaped wall gradually rises backward from the outer edge of the assembly flat wall.

[0008] Preferably, an air blowing hole connected to the outside is provided on the arc-shaped wall, and the air blowing direction of the air blowing hole is toward the threaded blade.

[0009] Preferably, the chip guard piece and the tool handle are an integrated structure, the cutting groove is formed by milling on the assembly section, and the chip guard piece is a reserved section after the cutting groove is cut and milled.

[0010] Preferably, the thread insert further comprises a first side wall and a second side wall intersecting with the alignment side wall, the thread insert has three cutting edges, the three cutting edges are respectively formed at three end corners, and chip guide grooves are arranged behind the cutting edges.

[0011] Preferably, there is a chip clearance between the flat chip retaining wall and the first side wall of the threaded insert.

[0012] Preferably, the blade slot further comprises a slot wall abutting against the second side wall.

[0013] Preferably, a center hole is formed in the middle of the threaded blade, an assembly hole aligned with the center hole is formed at the bottom of the blade slot, and clamping bolts are mounted in the center hole and the assembly hole.

[0014] Compared with the prior art, the utility model has the following technical effects: a chip blocking piece is provided at the front end of the tool handle to discharge metal chips outward, especially when processing the internal thread of the bottle mouth, it can effectively prevent metal chips from entering the interior of the bottle body, and the metal chips are concentrated at the bottle mouth, which is convenient for cleaning and ensures the quality of the cylinder; the chip blocking piece is formed in front of the blade groove, the flat chip blocking wall is perpendicular to the axis of the tool handle, and a chip feeding interval is provided between the threaded blade, which effectively improves the chip blocking effect; the arc-shaped wall behind the cutting groove cooperates with the chip guide groove behind the blade to guide the metal chips to the bottle mouth; the positioning groove wall cooperates with the alignment side wall to ensure the positioning accuracy of the blade and improve the internal thread processing accuracy; the chip blocking piece and the tool handle are an integrated structure. As a part of the entire tool handle, the chip blocking piece can be formed during the milling process of the cutting groove. The processing is efficient and convenient, and the structural strength of the tool handle is guaranteed; the setting of the blowing hole can effectively reduce the temperature of the thread blade and the processing position, reduce the loss of the thread blade, and improve the quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the assembly structure of the threaded blade 20 in the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the shank assembly section 12 of the utility model;

[0018] Markings in the figure: connecting section 11; assembly section 12; cutting groove 13; blade groove 131; positioning groove wall 1311; abutting groove wall 1312; chip clearance 1313; assembly hole 1314; clearance gap 132; chip stopper 14; chip stopper flat wall 141; arc wall 15; blowing hole 151; threaded blade 20; blade 21; center hole 22; chip guide groove 23. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0020] See also Figure 1-Figure 3 This embodiment discloses an external chip removal internal hole thread cutter bar, which is used for processing internal hole threads and is particularly suitable for processing internal threads of cylinder mouths. The cutter bar includes a tool handle and a thread blade 20.

[0021] The tool handle includes a connecting section 11 fixedly connected to the tool seat, and an assembly section 12 for assembling the threaded blade 20, wherein the connecting section 11 is an equal-diameter cylindrical body, and the assembly section 12 is an inward-retracted cylindrical body. The assembly section 12 has a cutting groove 13, and the cutting groove 13 runs through the radial left and right of the tool handle, and a chip stopper 14 is fixed in front of the cutting groove 13; the chip stopper 14 and the tool handle are an integrated structure, and the cutting groove 13 is milled on the assembly section 12, and the chip stopper 14 is a reserved section after the cutting groove 13 is milled. As a part of the entire tool handle, the chip stopper 14 can be formed during the milling process of the cutting groove 13, which is efficient and convenient to process, and ensures the structural strength of the tool handle.

[0022] The bottom of the cutting groove 13 has a mounting flat wall, on which a recessed blade groove 131 for mounting a threaded blade 20 is provided. The threaded blade 20 has a positioning side wall, and the blade groove 131 has a positioning groove wall 1311 that fits closely with the positioning side wall. The positioning groove wall 1311 forms a predetermined angle with the central axis of the tool handle, and the predetermined angle is determined according to the parameters of the internal thread to be processed. The positioning groove wall 1311 cooperates with the positioning side wall to ensure the positioning accuracy of the blade and improve the internal thread processing accuracy. There is a clearance gap 132 between the positioning groove wall 1311 and the chip blocking piece 14 for the working blade 21 of the threaded blade 20 to extend.

[0023] A chip-blocking flat wall 141 is formed on the side of the chip-blocking piece 14 facing the cutting groove 13, and the chip-blocking flat wall 141 is perpendicular to the central axis of the tool handle; a curved wall 15 is provided at the rear of the cutting groove 13, and the curved wall 15 gradually rises backward from the outer edge of the assembly flat wall to facilitate the discharge of metal chips from the cutting groove 13; a blowing hole 151 connected to the outside is opened on the curved wall 15, and the blowing direction of the blowing hole 151 is toward the threaded blade 20 to cool down the threaded blade 20 and the processing position.

[0024] The threaded blade 20 also includes a first side wall and a second side wall intersecting with the alignment side wall. The threaded blade 20 has three cutting edges 21, and the three cutting edges 21 are respectively formed at three end corners. A chip guide groove 23 is provided behind the cutting edges 21. A chip clearance 1313 is provided between the chip blocking flat wall 141 and the first side wall of the threaded blade 20 to guide out the metal chips generated by the processing; in order to further improve the assembly stability of the threaded blade 20, the blade groove 131 also includes a groove wall 1312 abutting against the second side wall, and a center hole 22 is opened in the middle of the threaded blade 20. The bottom of the blade groove 131 is provided with an assembly hole 1314 aligned with the center hole 22, and clamping bolts are installed in the center hole 22 and the assembly hole 1314 to achieve a fixed connection between the threaded blade 20 and the tool handle.

[0025] It should be understood that in the claims and description of the utility model, all "including..." should be understood as open-ended meanings, that is, their meanings are equivalent to "at least including...", and should not be understood as closed-ended meanings, that is, their meanings should not be understood as "only including...". The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0026] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should be covered by the protection scope of the utility model.

Claims

1. An external chip removal internal hole threading tool bar, comprising a tool handle and a threading blade, characterized in that: The tool handle includes a connecting section fixed to the tool seat, and an assembly section for assembling a threaded blade; the assembly section is provided with a cutting groove, the cutting groove penetrates radially left and right of the tool handle, and a chip stopper is fixed in front of the cutting groove; the bottom of the cutting groove is provided with an assembly flat wall, and an inward-recessed blade groove for assembling a threaded blade is provided on the assembly flat wall, the threaded blade has an alignment side wall, the blade groove has a positioning groove wall that fits closely with the alignment side wall, and the positioning groove wall forms a predetermined angle with the center axis of the tool handle; a clearance gap is provided between the positioning groove wall and the chip stopper for the threaded blade to extend out.

2. The external chip removal internal hole thread cutter bar according to claim 1, characterized in that: A flat chip-blocking wall is formed on one side of the chip-blocking piece facing the cutting groove, and the flat chip-blocking wall is perpendicular to the central axis of the tool handle.

3. The external chip removal internal hole thread cutter bar according to claim 2, characterized in that: The rear of the cutting groove is provided with an arc-shaped wall, and the arc-shaped wall gradually rises backward from the outer edge of the assembly flat wall.

4. The external chip removal internal hole thread cutter bar according to claim 3, characterized in that: The arc-shaped wall is provided with an air blowing hole connected to the outside, and the air blowing direction of the air blowing hole is toward the threaded blade.

5. The external chip removal internal hole thread cutter bar according to claim 2, characterized in that: The chip guard piece and the tool handle are an integrated structure, the cutting groove is formed by milling on the assembly section, and the chip guard piece is a reserved section after the cutting groove is milled.

6. The external chip removal internal hole thread cutter bar according to any one of claims 2 to 5, characterized in that: The thread blade also includes a first side wall and a second side wall intersecting with the alignment side wall. The thread blade has three cutting edges, which are respectively formed at three end corners. A chip guide groove is arranged behind each of the cutting edges.

7. The external chip removal internal hole thread cutter bar according to claim 6, characterized in that: A chip clearance is provided between the flat chip retaining wall and the first side wall of the threaded insert.

8. The external chip removal internal hole thread cutter bar according to claim 7, characterized in that: The insert slot also includes a slot wall abutting against the second side wall.

9. The external chip removal internal hole thread cutter bar according to claim 8, characterized in that: A center hole is provided in the middle of the threaded blade, and an assembly hole aligned with the center hole is provided at the bottom of the blade slot, and clamping bolts are installed in the center hole and the assembly hole.

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