Stepped reamer

Abstract

The stepped reamer comprises a reamer body and an extending section integrally formed and connected to one end of the reamer body, a reamer ridge is machined on the circumferential face of the reamer body, and a first stepped blade, a second stepped blade and a tail blade are sequentially machined on the reamer ridge in the direction from the end, away from the extending section, of the reamer ridge to the extending section. And the diameters of the first stepped blade, the second stepped blade and the tail blade are different. In the stepped hole machining process, reamers of different models do not need to be replaced, the stepped hole can be machined at a time, and meanwhile the advantages of guaranteeing the centering performance of the stepped hole and guaranteeing the working efficiency are achieved.

Description

Technical Field

[0001] The present application relates to the field of reamer, and in particular to a stepped reamer. Background Art

[0002] A reamer is a multi-purpose tool used for drilling and expanding holes. During operation, each tooth cuts off the excess of the workpiece intermittently in sequence.

[0003] At present, when using common reamer to process stepped holes, it is necessary to replace reamer of different types to complete the processing of a stepped hole, and the same reamer cannot be used to complete the processing of the stepped hole at one time.

[0004] With respect to the above-mentioned related technologies, the inventors believe that replacing reamers of different models during the process of machining stepped holes on a workpiece not only requires calibration of the replaced reamers, but also reduces the centering of the stepped holes and reduces work efficiency. Summary of the invention

[0005] In order to avoid the need to replace reamers of different models during the process of machining stepped holes, ensure the centering of the stepped holes and ensure work efficiency, the present application provides a stepped reamer.

[0006] The step-type reamer provided in this application adopts the following technical solution:

[0007] A stepped reamer comprises a cutter body and an extension section integrally formed and connected to one end of the cutter body, a cutter spine is formed on the peripheral surface of the cutter body, a first step edge, a second step edge and a tail edge are formed on the cutter spine in sequence from one end of the cutter spine away from the extension section toward the extension section, and the diameters of the first step edge, the second step edge and the tail edge are all different.

[0008] By adopting the above technical solution, the applicability of the reamer is improved by setting blades of various diameters. During the process of reaming the step hole, there is no need to replace the reamer, and the step hole processing can be completed at one time. The step hole can be processed at one time using the same reamer, which can ensure the centering of the reamer and the step hole during the processing, thereby ensuring the processing efficiency. At the same time, it can also improve the smoothness and precision of the stepped hole surface and reduce the possibility of burrs on the stepped hole surface.

[0009] Optionally, the diameter of the first step edge is smaller than the diameter of the second step edge, and the diameter of the tail edge is smaller than the diameter of the first step edge.

[0010] By adopting the above technical solution, it is not only beneficial to perform the hole opening work on the workpiece, but also beneficial to complete the step hole opening work on the workpiece.

[0011] Optionally, the diameter of the first step edge ranges from 9.975 mm to 9.983 mm;

[0012] The diameter of the second step edge ranges from 10.005 mm to 10.013 mm.

[0013] By adopting the above technical solution, the size of the step edge can be reasonably controlled, thereby improving the accuracy of the step edge.

[0014] Optionally, an end edge is formed at one end of the blade spine away from the extension section, and the diameter of the end edge is smaller than the diameter of the tail edge.

[0015] By adopting the above technical solution, the reamer can be accurately positioned on the workpiece and the hole opening work can be completed.

[0016] Optionally, the stepped reamer further comprises a plug-in column coaxially connected to the end surface of the extension section, wherein the plug-in column is inserted into the handle;

[0017] A locking component is installed on the knife handle, and a locking end of the locking component can be clamped on the plug-in column.

[0018] By adopting the above technical solution, it is convenient to replace the tool body that is worn out after long-term work, and the tool handle part with less wear can be retained, thereby achieving the purpose of reducing the use cost.

[0019] Optionally, a countersunk hole for installing a locking assembly is formed on the outer wall of the knife handle, and the locking assembly includes a fixed baffle movably arranged in the countersunk hole, a positioning column fixed to the fixed baffle and with one end passing through the baffle and capable of being engaged with a plug-in column, a compression spring sleeved on the positioning column, and a sealing plate fixed to the opening of the countersunk hole, and the positioning column is movably penetrated through the sealing plate at one end away from the fixed baffle.

[0020] By adopting the above technical solution, the locking component located inside the tool handle will not hinder the reamer itself from being installed on the fixture of the cutting equipment, and can also form hidden protection for the locking component. The overall structure of the locking component is simple, and it can stably connect and lock the plug-in column and the tool handle. When the tool body needs to be replaced, the positioning column can be pulled to quickly disassemble the two, thereby facilitating the replacement of the tool body that has been worn after long-term work.

[0021] Optionally, an end of the positioning column close to the fixed baffle is processed with a bevel.

[0022] By adopting the above technical solution, when the plug-in column is inserted into the tool handle, after the plug-in column abuts against the inclined surface, the positioning column can automatically move toward the outside of the tool handle, thereby facilitating the connection of the plug-in column to the tool handle.

[0023] Optionally, the locking assembly further comprises a pull ring rotatably connected to one end of the positioning column close to the sealing plate.

[0024] By adopting the above technical solution, the locking relationship between the contact plug-in column and the knife handle is facilitated by the pull ring.

[0025] Optionally, the plug-in column is provided with a locking groove for the positioning column to be engaged.

[0026] Optionally, a limit slot is provided in the tool handle, and a limit key which is adapted to the limit slot and can be inserted into the limit slot is fixedly provided on the plug-in column.

[0027] By adopting the above technical solution, the limit key is inserted into the limit groove, which can pre-align the positioning column with the locking groove, which is conducive to completing the locking connection of the plug-in column. At the same time, the limit key also increases the contact area between the plug-in column and the tool handle, and cooperates with the positioning column to further stably connect the plug-in column to the tool handle, thereby improving the reliability of the tool body during high-speed rotation of the tool body.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. By providing a cutter body, an extension section, a cutter spine, and a first step edge, a second step edge, and a tail edge with different diameters, and by providing cutter edges with various diameters, the applicability of the reamer is improved. During the process of reaming a stepped hole, the reamer does not need to be replaced, and the processing of the stepped hole can be completed at one time, which can ensure the centering of the reamer and the stepped hole during the processing, thereby ensuring the processing efficiency;

[0030] 2. By setting the end blade, it is convenient for the reamer to be accurately positioned on the workpiece and to complete the hole opening work;

[0031] 3. By setting the plug-in column and the locking assembly, it is convenient to replace the cutter body that is worn out after long-term work, and the handle part with less wear can be retained, thereby achieving the purpose of reducing the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the stepped reamer in the first embodiment.

[0033] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the stepped reamer in the second embodiment.

[0034] Figure 3 It is a schematic diagram of the cross-sectional structure of the tool handle, the plug-in column and the locking assembly.

[0035] Figure 4 It is a schematic diagram of the enlarged cross-sectional structure of the locking component.

[0036] Explanation of the reference numerals in the accompanying drawings: 1. tool body; 11. tool spine; 12. first step edge; 13. second step edge; 14. end edge; 15. tail edge; 2. extension section; 3. chip groove; 4. tool handle; 41. plug-in hole; 42. limit groove; 5. plug-in column; 51. limit key; 52. locking groove; 6. locking assembly; 61. fixed baffle; 62. positioning column; 63. compression spring; 64. sealing plate; 65. bolt; 66. pull ring. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-4 , further details of this application are given.

[0038] Embodiment 1

[0039] The present application embodiment discloses a stepped reamer, referring to Figure 1 The stepped reamer includes a tool body 1, an extension section 2 integrally connected to one end of the tool body 1, and a tool handle 4 integrally connected to the end of the extension section 2 away from the tool body 1. The diameter of the tool body 1 is larger than the diameter of the extension section 2, and the diameter of the tool handle 4 is larger than the diameter of the extension section 2.

[0040] Reference Figure 1 A plurality of blade ridges 11 are machined and formed on the peripheral surface of the cutter body 1. The length direction of the blade ridges 11 is inclined to the rotation axis of the cutter body 1. An end edge 14, a first step edge 12, a second step edge 13, and a tail edge 15 are machined and formed in sequence from the end of the cutter body 1 away from the extension section 2 to the extension section 2. The diameters of the end edge 14, the tail edge 15, the first step edge 12, and the second step edge 13 increase in sequence, forming a step shape on the cutter body 1. A plurality of blades of different diameters are machined and formed on the same cutter body 1, which is conducive to the reamer to complete the machining of the step hole without replacing the reamer. Without replacing the reamer, it is conducive to maintaining the centering of the reamer with the step hole and maintaining the work efficiency during machining. The end edge 14 with the smallest diameter is conducive to the accurate and rapid positioning of the reamer on the workpiece.

[0041] In this embodiment, the diameter range of the first step edge 12 is 9.975mm-9.983mm, and the diameter range of the second step edge 13 is 10.005mm-10.013mm. By reasonably controlling the diameter range of the step edge, the hole opening accuracy of the reamer when opening a step hole is improved.

[0042] Reference Figure 1A chip groove 3 is formed between two adjacent blade ridges 11, one end of the chip groove 3 is connected to the end surface of the tool body 1 provided with an end blade 14, the other end of the chip groove 3 is connected to the circumferential surface of the extension section 2 and the chip groove 3 is located on the extension section 2, and the chip groove 3 is located on both sides of one end of the extension section 2 in an arc shape, thereby facilitating the discharge of cutting chips generated during the operation of the reamer.

[0043] Embodiment 2

[0044] The difference between this embodiment and the first embodiment is that:

[0045] Reference Figure 2 In this embodiment, the extension section 2 and the handle 4 are detachably fixedly connected. A plug-in column 5 is integrally formed on the end surface of the extension section 2 facing away from the blade body 1. The plug-in column 5 can be inserted into the inside of the handle 4. A locking assembly 6 is installed on the handle 4. The locking assembly 6 can lock the plug-in column 5 on the handle 4, and the plug-in column 5 and the handle 4 can be disassembled and connected. The plug-in column 5 can be a cylindrical structure or a square rod structure. In this embodiment, the plug-in column 5 adopts a square rod structure, and the length direction of the plug-in column 5 coincides with the rotation axis of the blade body 1.

[0046] Combination Figure 2 and Figure 3 In this embodiment, two limit keys 51 are integrally formed and symmetrically arranged on the circumference of the plug-in column 5, and a locking groove 52 for cooperating with the locking assembly 6 is opened on the circumference of the plug-in column 5 away from the limit keys 51.

[0047] Combination Figure 2 and Figure 3 On one end surface of the knife handle 4, a plug-in hole 41 is provided toward the inside of the knife handle 4 for the plug-in column 5 to be inserted, and on the inner wall of the plug-in hole 41, two limit slots 42 are provided for the limit keys 51 to be inserted. After the limit keys 51 are inserted into the limit slots 42, the locking end of the locking assembly 6 can be pre-aligned with the positioning slot, so that the locking assembly 6 can complete the connection work of the plug-in column 5 and the knife handle 4. In addition, the limit keys 51 can increase the contact area between the plug-in column 5 and the knife handle 4, and can enhance the rotation stability of the knife body 1 during the rotation of the knife body 1.

[0048] Combination Figure 3 and Figure 4 A countersunk hole connecting the plug hole 41 and used to install the locking assembly 6 is opened on the outer wall of the knife handle 4. The locking assembly 6 includes a fixed baffle 61 movably arranged at the bottom of the countersunk hole, a positioning column 62 with one end passing through the fixed baffle 61 and fixedly connected to the fixed baffle 61, a compression spring 63 sleeved on the positioning column 62, and a sealing plate 64 covering the opening of the countersunk hole, a plurality of bolts 65 connecting the sealing plate 64 to the knife handle 4, and a pull ring 66 rotatably connected to the end of the positioning column 62 facing the outside of the knife handle 4.

[0049] In this embodiment, the positioning column 62 is made of a square rod structure, and the end face of the positioning column 62 inserted into the plug hole 41 is processed into an inclined surface, which is inclined toward the opening of the plug hole 41, and the end of the positioning column 62 facing the outside of the handle 4 is movably penetrated on the sealing plate 64. The pull ring 66 is D-shaped, and the semi-annular section of the pull ring 66 can be placed flat in the opening of the countersunk hole, so as to hide the pull ring 66.

[0050] When the plug-in column 5 is inserted into the plug-in hole 41, the end of the plug-in column 5 abuts against the inclined surface of the positioning column 62, and automatically pushes the positioning column 62 to retract into the countersunk hole. When the positioning column 62 corresponds to the positioning groove, the compression spring 63 pushes the fixed baffle 61 and drives the positioning column 62 to be automatically inserted into the positioning groove, thereby completing the connection between the plug-in column 5 and the handle 4. When the knife body 1 needs to be replaced after long-term use and wear, the pull ring 66 is taken out of the countersunk hole and pulled to make the positioning column 62 disengage from the positioning groove, and the locking assembly 6 can release the locking of the plug-in column 5. The overall structure of the locking assembly 6 is simple, which is convenient for stably connecting the plug-in column 5 to the handle 4, and also convenient for disassembly of the two, which is convenient for the staff to operate and use.

[0051] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stepped reamer, characterized in that: The invention comprises a blade body (1) and an extension section (2) integrally formed and connected to one end of the blade body (1); a blade spine (11) is formed on the peripheral surface of the blade body (1); a first step edge (12), a second step edge (13) and a tail edge (15) are formed on the blade spine (11) in sequence from the end of the blade spine (11) away from the extension section (2) toward the extension section (2); and the diameters of the first step edge (12), the second step edge (13) and the tail edge (15) are all different; The diameter of the first step edge (12) is smaller than the diameter of the second step edge (13), and the diameter of the tail edge (15) is smaller than the diameter of the first step edge (12).

2. A stepped reamer according to claim 1, characterized in that: The diameter of the first step edge (12) ranges from 9.975 mm to 9.983 mm; The diameter of the second step edge (13) ranges from 10.005 mm to 10.013 mm.

3. A stepped reamer according to claim 1 or 2, characterized in that: An end blade (14) is formed on one end of the blade spine (11) away from the extension section (2), and the diameter of the end blade (14) is smaller than the diameter of the tail blade (15).

4. A stepped reamer according to claim 3, characterized in that: The stepped reamer also includes a plug-in column (5) coaxially connected to the end surface of the extension section (2), and the plug-in column (5) is inserted into the handle (4); A locking component (6) is installed on the knife handle (4), and a locking end of the locking component (6) can be clamped on the plug-in column (5).

5. A stepped reamer according to claim 4, characterized in that: The outer wall of the knife handle (4) is provided with a countersunk hole for installing a locking assembly (6), and the locking assembly (6) comprises a fixed baffle (61) movably arranged in the countersunk hole, a positioning column (62) fixed to the fixed baffle (61) and having one end passing through the baffle and capable of being engaged with the plug-in column (5), a compression spring (63) sleeved on the positioning column (62), and a sealing plate (64) fixed to the opening of the countersunk hole, and one end of the positioning column (62) away from the fixed baffle (61) is movably passed through the sealing plate (64).

6. A stepped reamer according to claim 5, characterized in that: One end of the positioning column (62) close to the fixed baffle (61) is processed with a bevel.

7. A stepped reamer according to claim 5, characterized in that: The locking assembly (6) further comprises a pull ring (66) rotatably connected to one end of the positioning column (62) close to the sealing plate (64).

8. A stepped reamer according to claim 6, characterized in that: The plug-in column (5) is provided with a locking groove (52) for the positioning column (62) to be engaged.

9. A stepped reamer according to claim 4, characterized in that: A limiting groove (42) is provided in the knife handle (4), and a limiting key (51) adapted to the limiting groove (42) and capable of being inserted into the limiting groove (42) is fixedly arranged on the plug-in column (5).

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