One-step forming tool for arc chamfered circular hole

Abstract

A one-time forming tool for arc chamfering a circular hole, comprising a hole cutter, the hole cutter is a tool body of a cylindrical structure, the bottom cutting area of ​​the hole cutter is circumferentially provided with a spiral slag removal groove, a through groove is provided on the rod body of the hole cutter near the top, a chamfering cutter is inserted in the through groove, the chamfering cutter is a blade of a semicircular structure, the arc edge of the chamfering cutter faces downward, and both sides thereof extend out of the through groove to form a mutually symmetrical chamfering cutting portion, and a fixing component for fixing the chamfering cutter is provided on the side wall of the hole cutter. The utility model can complete the one-time forming processing of arc chamfering, and solves the practical problems existing in the current processing of such chamfering structures.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a one-time forming tool for arc-shaped chamfered circular holes. Background Art

[0002] The processing and forming of molds are generally completed by machining. In the processing of some circular hole chamfering, the conventional processing method is to complete the circular hole processing first, and then use a chamfering tool to complete the chamfering at the hole mouth. This processing method requires the replacement of tools on the machine tool, which is a bit cumbersome in terms of process. For some non-metallic molds, such as graphite molds, the secondary processing after replacing the tool may affect or even destroy the accuracy of the processed circular hole. Therefore, there are still some problems with the conventional secondary processing chamfering process. In addition, for the chamfering of the arc-shaped concave structure, the conventional chamfering tool cannot be used to complete the processing. At present, in actual processing, a special chamfering tool must be used. However, on the one hand, the cost of the special chamfering tool is high, and on the other hand, there are still some problems caused by the secondary processing chamfering. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide a one-time forming tool for arc chamfered circular holes, which can complete the one-time forming process of the arc chamfer and solve the practical problems existing in the current processing of such chamfered structures.

[0004] The technical solutions adopted by the utility model to solve the above problems are as follows:

[0005] A one-time forming tool for arc-chamfered circular holes, comprising a hole cutter, the hole cutter being a tool body with a cylindrical structure, the bottom cutting area of ​​the hole cutter being circumferentially provided with a spiral slag discharge groove, a through groove being provided on a rod body near the top of the hole cutter, a chamfering tool being inserted into the through groove, the chamfering tool being a blade tool with a semicircular structure, the arc edge of the chamfering tool facing downward, and both sides thereof extending out of the through groove to form mutually symmetrical chamfering cutting portions, and a fixing component for fixing the chamfering tool being provided on the side wall of the hole cutter.

[0006] As a preferred solution of the above technical solution, the fixing assembly includes a fixing bolt and a screw hole arranged at the position of the chamfering cutter on the side wall of the hole cutter, and the fixing bolt is threadedly inserted into the screw hole and fixed on the chamfering cutter.

[0007] As a preferred solution of the above technical solution, a reinforcement seat is provided on the side wall of the hole cutter at the upper side of the chamfering cutting portion, and a limiting groove matching the chamfering cutter is provided at the bottom of the reinforcement seat, and the limiting groove is embedded in the chamfering cutter.

[0008] As a preferred solution of the above technical solution, the bottom of the through groove extends vertically downward along the axial direction of the hole cutter to near the bottom of the hole cutter, so that the chamfering tool can be slidably adjusted along the axial direction in the through groove.

[0009] As a preferred solution of the above technical solution, the fixing assembly includes a sliding sleeve, fixing ears arranged on both sides of the sliding sleeve for fixing the chamfering knife, and limiting bolts arranged on the side wall of the sliding sleeve. The sliding sleeve is arranged on the hole cutter, and slots for the chamfering knife to pass through are opened on both sides of the sliding sleeve corresponding to the position of the through groove, and the fixing ears are arranged at the edge of the slot.

[0010] As a preferred solution of the above technical solution, the bottom of the sliding sleeve is located above the bottom arc edge of the chamfering cutter.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model innovatively utilizes the existing tool structure in structure, and improves and combines it based on this structure to form the simple composite tool of the present application. On the one hand, in structure, the tool is completely improved and combined on the basis of the existing tool structure. According to the structural characteristics of the workpiece to be processed, the existing tools are combined to form a tool that is completely tailored to the needs of practical production. It does not need to be customized separately, and it is very practical, and a large part of the cost can be saved; on the other hand, the tool of the present application can complete the one-time forming of the circular hole and the arc chamfer, and no longer requires the cumbersome process of secondary processing caused by replacing the tool, and the processing accuracy of the circular hole chamfer is further guaranteed, which well solves a series of problems existing in the current conventional production and processing, and effectively improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a side view structural schematic diagram of the utility model;

[0015] Figure 3 It is a structural schematic diagram of Example 2;

[0016] Figure 4 It is a side view structural schematic diagram of Example 2;

[0017] Figure 5 This is a schematic diagram of the state structure after sliding adjustment of Example 2;

[0018] Figure 6 It is a schematic diagram of the structure of the sliding sleeve.

[0019] Markings in the figure: 1. hole cutter, 2. spiral slag discharge groove, 3. through groove, 4. chamfering cutter, 5. fixing bolt, 6. screw hole, 7. reinforcement seat, 71. limit groove, 8. sliding sleeve, 81. slotting, 9. fixing ear, 10. limit bolt. DETAILED DESCRIPTION

[0020] The specific implementation of the technical solution of the utility model is further introduced below in conjunction with the accompanying drawings.

[0021] Example 1

[0022] like Figure 1-2 As shown, the present embodiment discloses a one-time forming tool for arc-chamfered circular holes, comprising a hole cutter 1, wherein the hole cutter 1 is a tool body with a cylindrical structure, and the bottom cutting area of ​​the hole cutter 1 is circumferentially provided with a spiral slag discharge groove 2, and the top end of the hole cutter 1 is integrally connected with a clamping portion, and a through groove 3 is opened on the rod body of the hole cutter 1 near the top, and the through groove 3 is a square structure, and a chamfering knife 4 is passed through the through groove 3. In the present embodiment, the through groove 3 and the chamfering knife 4 are matched in size, and the chamfering knife 4 is a sheet knife with a semicircular structure, and the arc edge of the chamfering knife 4 faces downward, and its two sides extend out of the through groove 3 to form a mutually symmetrical chamfering cutting portion, and the chamfering cutting portion completes the cutting of the arc-shaped concave chamfer on the inner circumference of the top of the circular hole after the hole cutter 1 completes the processing of the circular hole, thereby realizing the integrated forming of the circular hole and the chamfer, and a fixing component for fixing the chamfering knife 3 is provided on the side wall of the hole cutter 1.

[0023] In this embodiment, the fixing assembly includes a fixing bolt 5 and a screw hole 6 provided at the side wall of the hole cutter 1 at a position corresponding to the chamfering cutter 4. The screw hole 6 and the through slot 3 are mutually interpenetrating. The end of the fixing bolt 5 can be directly inserted into the through slot 3 to abut against the chamfering cutter 4. After the fixing bolt 5 is threadedly inserted into the screw hole 6, it abuts against the chamfering cutter 4 to fix the position of the chamfering cutter 4. In addition, a concave point for abutment can also be provided on the chamfering cutter 4 at a position corresponding to the fixing bolt 5, so as to improve the fixing effect of the fixing bolt 5.

[0024] In addition, a reinforcement seat 7 is provided on the side wall of the hole cutter 1 at the upper side of the chamfering cutting portion, and a limiting groove 71 matching the chamfering cutter 4 is provided at the bottom of the reinforcement seat 7. The limiting groove 71 is embedded in the chamfering cutter 4. The reinforcement seat 7 can effectively protect the chamfering cutter 4 during the cutting process to avoid problems such as curling and breakage of the chamfering cutter 4, while also further improving the installation stability of the chamfering cutter 4.

[0025] Example 2

[0026] like Figure 3-6As shown, the technical scheme of this embodiment is basically consistent with that of Embodiment 1, with the only difference being that the bottom of the through groove 3 extends vertically downward along the axial direction of the hole cutter 1 to near the bottom of the hole cutter 1, so that the chamfering cutter 4 can be slidably adjusted axially in the through groove 3, that is, the through groove 3 is equivalent to a slide groove, which can provide sufficient axial sliding space for the chamfering cutter 4, so as to complete the adjustment of the relative position between the chamfering cutter 4 and the hole cutter 1, mainly to meet the processing needs of circular holes of different depths.

[0027] At the same time, in order to match the above-mentioned sliding structure, in the present embodiment, the fixing assembly includes a sliding sleeve 8, fixing ears 9 arranged on both sides of the sliding sleeve 8 for fixing the chamfering knife 4, and limiting bolts 10 arranged on the side walls of the sliding sleeve 8. The sliding sleeve 8 is a sleeve body with a cylindrical structure, and its inner diameter matches the outer diameter of the hole cutter 1. The sliding sleeve 8 is slidingly arranged on the hole cutter 1. Slots 81 for the chamfering knife 4 to pass through are provided at the positions of the through grooves 3 on both sides of the sliding sleeve 8. The slot 81 is actually a U-shaped slot with an open bottom. After the chamfering knife 4 is inserted, the top of the chamfering knife 4 abuts against the top wall of the slot 81 to form an abutment and fixation. This structure is similar to the structure of the reinforcement seat 7 in Example 1. At the same time, the bottom of the sliding sleeve 8 is located above the bottom arc edge of the chamfering knife 4 to avoid the bottom of the sliding sleeve 8 blocking the cutting part of the chamfering knife 4.

[0028] In addition, the fixing ear 9 is arranged at the edge of the slot 81, and a screw hole is arranged in the center of the fixing ear 9. The limit bolt 10 completes the fixation of the chamfering tool 4 through the fixing ear 9. One fixing ear 9 can be arranged on each side, or it can be arranged as a pair distributed on both sides of the chamfering tool 4. In actual use, it is found that a fixing ear 9 is respectively arranged at the slots 81 on both sides to meet the fixing requirements of the chamfering tool 4. Of course, if it is necessary to process a hard metal workpiece and the chamfering tool 4 is subjected to large force, it is better to arrange a pair of fixing ears 9 at the edge of each slot 81.

[0029] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the scope of the claims of the utility model.

Claims

1. A one-step forming tool for arc-shaped chamfered circular holes, comprising a hole cutter (1), characterized in that: The hole cutter (1) is a cutter body with a cylindrical structure. The bottom cutting area of ​​the hole cutter (1) is provided with a spiral slag removal groove (2) on its circumference. A through groove (3) is provided on the rod body of the hole cutter (1) near the top. A chamfering knife (4) is inserted into the through groove (3). The chamfering knife (4) is a blade with a semicircular structure. The arc edge of the chamfering knife (4) faces downward, and its two sides extend out of the through groove (3) to form mutually symmetrical chamfering cutting parts. A fixing component for fixing the chamfering knife (4) is provided on the side wall of the hole cutter (1).

2. A one-step forming tool for arc-shaped chamfered circular holes as claimed in claim 1, characterized in that: The fixing assembly comprises a fixing bolt (5) and a screw hole (6) arranged at a position of the chamfering cutter (4) corresponding to the side wall of the hole cutter (1); the fixing bolt (5) is threadedly inserted into the screw hole (6) and then abutted and fixed on the chamfering cutter (4).

3. A one-step forming tool for arc-shaped chamfered circular holes as claimed in claim 1, characterized in that: A reinforcement seat (7) is provided on the side wall of the hole cutter (1) at the upper side of the chamfering cutting portion, and a limiting groove (71) matching the chamfering cutter (4) is provided at the bottom of the reinforcement seat (7), and the limiting groove (71) is embedded in the chamfering cutter (4).

4. A one-step forming tool for arc-shaped chamfered circular holes as claimed in claim 1, characterized in that: The bottom of the through groove (3) extends vertically downward along the axial direction of the hole cutter (1) to a position close to the bottom of the hole cutter (1), so that the chamfering cutter (4) can be slidably adjusted along the axial direction in the through groove (3).

5. A one-step forming tool for arc-shaped chamfered circular holes as claimed in claim 4, characterized in that: The fixing assembly comprises a sliding sleeve (8), fixing ears (9) arranged on both sides of the sliding sleeve (8) for fixing the chamfering knife (4), and a limiting bolt (10) arranged on the side wall of the sliding sleeve (8); the sliding sleeve (8) is arranged on the hole knife (1); slots (81) for the chamfering knife (4) to pass through are opened at positions on both sides of the sliding sleeve (8) corresponding to the through grooves (3); and the fixing ears (9) are arranged at the edges of the slots (81).

6. A one-step forming tool for arc-shaped chamfered circular holes as claimed in claim 5, characterized in that: The bottom of the sliding sleeve (8) is located above the bottom arc edge of the chamfering knife (4).

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