Drilling and forming compound tool

Abstract

The utility model provides a drilling and forming compound cutter, including first drilling and forming cutter, second drilling and forming cutter and rose reamer, the first drilling and forming cutter is used for drilling of multi-junction surface compound counter bore, the second drilling and forming cutter is used for broaching of multi-junction surface compound counter bore, the rose reamer is used for broaching of multi-junction surface compound counter bore, and the rose reamer is used for broaching of multi-junction surface compound counter bore. The chamfering tool is used for forming a chamfering part of the multi-joint-surface composite counter bore; three hole machining tools are adopted to form the composite tool, one-time machining forming of opening, chambering and chamfering of the multi-combination-face composite counter bores is achieved, the machining efficiency and machining precision of the holes are improved, and high reliability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cutters, in particular to a drilling and forming composite cutter. Background Art

[0002] In order to realize the connection of different mechanical parts, countersunk holes, through holes, threaded holes, etc. with different hole diameters and shapes are processed on them. At present, in order to improve the processing efficiency, different hole types generally need to be processed by two or more hole processing tools of the same or different types combined into a special composite tool. In the process of one processing, it can complete multiple processes such as drilling, reaming, boring, countersinking and boring, and has the characteristics of high efficiency, high precision and high reliability. Figure 1 The multi-joint-surface composite countersunk hole shown has a contour from the outside to the inside that includes a chamfered portion 1.1, an end face 1.2, a first hole section 1.3, a second hole section 1.4, a third hole section 1.5 and a hole bottom 1.6 that are connected in sequence. In order to realize the processing and forming of the multi-joint-surface composite countersunk hole, it is urgently necessary to provide a special drilling and forming composite tool for processing the multi-joint-surface composite countersunk hole. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a drilling and forming composite tool.

[0004] The utility model solves the technical problem by adopting a technical solution: a drilling and forming composite tool for forming a composite countersink with multiple combined surfaces, wherein the contour of the composite countersink with multiple combined surfaces includes a chamfered portion, an end surface, a first hole section, a second hole section, a third hole section and a hole bottom connected in sequence from the outside to the inside;

[0005] The drilling and forming composite tool comprises a first drilling and forming tool, a second drilling and forming tool and a chamfering tool, wherein the first drilling and forming tool is used for the preliminary forming of a composite countersunk hole with multiple joint surfaces, the second drilling and forming tool is used for the expansion forming of a composite countersunk hole with multiple joint surfaces, and the chamfering tool is used for the forming of the chamfered portion of a composite countersunk hole with multiple joint surfaces; wherein,

[0006] The first drilling and forming tool comprises a first tool body, which is a multi-step structure, and is provided with a first step, a second step and a third step in sequence from front to back, two first blades are symmetrically arranged in a radial direction on the front end surface of the first step, and the first blade is used for milling the bottom surface of the hole, a second blade is arranged on the second step surface, and the second blade is used for roughly forming the second hole section, and two third blades are symmetrically arranged in a radial direction on the third step surface, and the third blade is used for roughly forming the first hole section, and the forming outer diameters of the first blade, the second blade and the third blade meet the thickness of the reserved layer for preliminary forming of the composite countersunk hole with multiple bonding surfaces;

[0007] The second drilling and forming tool comprises a second tool body, which is also a multi-step structure, and is provided with a frustum portion, a columnar portion, a fourth step and a fifth step in sequence from front to back, a fourth blade and two fifth blades are provided on the front end surface of the frustum portion in the circumferential direction, the fourth blade and the fifth blade are used for forming the bottom of the hole, a sixth blade is provided on the front end of the side surface of the frustum portion, a seventh blade is provided on the rear end of the side surface of the frustum portion, and the sum of the lengths of the blades of the sixth blade and the seventh blade is equal to the length of the side surface of the frustum portion, the sixth blade and the seventh blade are used for forming the third conical hole section, two eighth blades are provided radially symmetrically on the upper surface of the fourth step surface, the eighth blade is used for forming the first hole portion, two ninth blades are provided radially symmetrically on the upper surface of the fifth step surface, the ninth blade is used for forming the end surface of the countersunk hole;

[0008] The chamfering tool comprises a third tool body, and two tenth blades are symmetrically provided at the front end of the third tool body in the radial direction, and the tenth blade is used for forming the chamfered portion.

[0009] Specifically, the diameter φ3 of the first step is 30±0.1 mm, the diameter φ2 of the second step is 35±0.1 mm, and the diameter φ1 of the third step is 47±0.1 mm.

[0010] Specifically, the distance H1 between the cutting edges of the first blade and the second blade in the axial direction is 3.83 mm, and the distance H2 between the cutting edges of the second blade and the third blade in the axial direction is 21.9 mm.

[0011] Specifically, the included angle a1 between the edge portion of the fourth blade and the cross section is 5°, the included angle a3 between the edge portion of the fifth blade and the cross section is 3°, and the cone angle a2 of the frustum portion is 60°.

[0012] Specifically, the diameter φ7 of the front end surface of the frustum portion is 14.8±0.05 mm, the diameter φ6 of the columnar portion is 38.2±0.05 mm, the diameter φ5 of the fourth step is 50.2±0.05 mm, and the diameter φ4 of the fifth step is 67.5±0.05 mm.

[0013] Specifically, the distance L3 from the blade edge of the eighth blade to the front of the frustum portion is 28.6±0.1 mm, the distance L2 from the blade edge of the ninth blade to the front of the frustum portion is 33.6±0.1 mm, and the length L1 of the second blade body is 64 mm.

[0014] Furthermore, in order to cool the blade during the processing, a coolant channel is also provided in the second drilling and forming tool. The coolant channel extends along the axis and is in a forked tree shape in the second tool body.

[0015] Specifically, the outer diameter φ8 of the third blade body is 81 mm, the included angle a4 between the blade edges of the tenth blade is 50°, and the diameter φ9 between the blade tips of the tenth blade is 60 mm.

[0016] The beneficial effect of the utility model is that the utility model provides a drilling and forming composite tool, which adopts three hole processing tools to form a composite tool, realizes the one-time processing and forming of hole opening, hole expansion and chamfering of composite countersunk holes with multiple bonding surfaces, improves the processing efficiency and processing accuracy of the hole, and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the structure of a composite countersunk hole with multiple bonding surfaces.

[0019] Figure 2 It is a structural schematic diagram of the first drilling and forming tool.

[0020] Figure 3 It is a schematic diagram of the processing state of the first drilling and forming tool.

[0021] Figure 4 It is a structural schematic diagram of the second drilling and forming tool.

[0022] Figure 5 It is a schematic diagram of the processing status of the second drilling and forming tool.

[0023] Figure 6 It is a schematic diagram of the structure of a chamfering cutter.

[0024] Figure 7 This is a schematic diagram of the chamfering cutter processing status.

[0025] In the figure: 1. Composite countersink with multiple joint surfaces, 1.1. Chamfered portion, 1.2. End face, 1.3. First hole section, 1.4. Second hole section, 1.5. Third hole section, 1.6. Bottom of hole, 1.7. Reserved layer, 1.8. Avoidance angle, 2. First drilling and forming tool, 2.1. First tool handle, 2.2. First tool body, 2.3. First blade, 2.4. Second blade, 2.5. Third blade, 3. Second drilling and forming tool, 3.1. Second tool handle, 3.2. Second tool body, 3.3. Fourth blade, 3.4. Fifth blade, 3.5. Sixth blade, 3.6. Seventh blade, 3.7. Eighth blade, 3.8. Ninth blade, 3.9. Coolant channel, 4. Chamfering tool, 4.1. Third tool handle, 4.2. Third tool body, 4.3. Tenth blade. DETAILED DESCRIPTION

[0026] The present invention is now described in further detail in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention, and directions and references (e.g., up, down, left, right, etc.) may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the subject matter for which protection is sought is limited only by the attached claims and their equivalents.

[0027] like Figure 1 The figure shows a composite countersunk hole 1 with multiple joining surfaces, whose contour from outside to inside includes a chamfered portion 1.1, an end face 1.2, a first hole segment 1.3, a second hole segment 1.4, a third hole segment 1.5 and a hole bottom 1.6 which are connected in sequence, wherein the chamfered portion 1.1 is an external chamfer, the angle between the generatrixes is 50°, the top of the chamfered portion 1.1 is connected to the outer periphery of the end face 1.2, and the interior from outside to inside includes the first hole segment 1.3, the second hole segment 1.4, the third hole segment 1.5 and the hole bottom 1.6, the first hole segment 1.3 is a circular hole with a diameter of 50 mm, the second hole segment 1.4 is a circular hole with a diameter of 38 mm, the third hole segment 1.5 is a conical hole with a cone angle of 50°, and the diameter of the hole bottom 1.6 is 15 mm.

[0028] The utility model provides a drilling and forming composite tool, which is used to form the above-mentioned multi-joint surface composite countersunk hole 1, including a first drilling and forming tool 2, a second drilling and forming tool 3 and a chamfering tool 4. The first drilling and forming tool 2 is used for the preliminary forming of the multi-joint surface composite countersunk hole 1, the second drilling and forming tool 3 is used for the expansion forming of the multi-joint surface composite countersunk hole 1, and the chamfering tool 4 is used for forming the chamfered portion 1.1 of the multi-joint surface composite countersunk hole 1.

[0029] like Figure 2 and Figure 3As shown, the first drilling and forming tool 2 includes a first tool body 2.2 and a first tool handle 2.1. The first tool body 2.2 is a multi-step structure, and is provided with a first step, a second step and a third step from front to back. Two first blades 2.3 are symmetrically arranged along the radial direction on the front end surface of the first step. The first blade 2.3 is used for milling the bottom 1.6 of the hole. A second blade 2.4 is arranged on the second step surface. The second blade 2.4 is used for roughly forming the second hole segment 1.4. Two third blades 2.5 are symmetrically arranged along the radial direction on the third step surface. The third blade 2.5 is used for roughly forming the first hole segment 1.3. The first blade 2.3, the second blade 2.4 ... The outer diameters of the second blade 2.4 and the third blade 2.5 meet the thickness of the reserved layer 1.7 for the preliminary forming of the multi-joint surface composite countersunk hole 1; since the third hole segment 1.5 is conical, the transition between the second hole segment 1.4 and the third hole segment 1.5 cannot be directly processed with a blade matching the second hole segment 1.4. Therefore, in order to avoid the transition, a second blade 2.4 with a certain height difference from the first blade 2.3 is used, and there is an angle between the blades of the two. During processing, an avoidance angle 1.8 is formed in the reserved layer 1.7, thereby pre-processing the third hole segment 1.5 and avoiding the influence on the diameter change transition. The second drilling tool 3 is also provided with a coolant channel 3.9, which extends along the axis and is in a forked tree shape in the second tool body 3.2. In this embodiment, the diameter φ3 of the first step is 30±0.1mm, the diameter φ2 of the second step is 35±0.1mm, and the diameter φ1 of the third step is 47±0.1mm. The axial distance H1 between the edges of the first blade 2.3 and the second blade 2.4 is 3.83mm, and the axial distance H2 between the edges of the second blade 2.4 and the third blade 2.5 is 21.9mm. Preferably, the model of the first blade 2.3 is SPMG090408, the model of the second blade 2.4 is CCMT060204, and the model of the third blade 2.5 is TCMT110204.

[0030] like Figure 4 and Figure 5As shown, the second drilling and forming tool 3 includes a second tool body 3.2 and a second tool handle 3.1, and the second tool body 3.2 is also a multi-step structure, and is provided with a frustum portion, a columnar portion, a fourth step and a fifth step in sequence from front to back, and a fourth blade 3.3 and two fifth blades 3.4 are provided on the front end surface of the frustum portion along the circumferential direction, and the fourth blade 3.3 and the fifth blade 3.4 are used for forming the hole bottom 1.6, and a sixth blade 3.5 is provided at the front end of the side surface of the frustum portion, and a seventh blade 3.6 is provided at the rear end of the side surface of the frustum portion, and the sum of the blade lengths of the sixth blade 3.5 and the seventh blade 3.6 is equal to the length of the side surface of the frustum portion, and the sixth blade 3.5 and the seventh blade 3.6 are used for forming the hole bottom 1.6. The forming of the conical third hole section 1.5, two eighth blades 3.7 are radially symmetrically arranged on the upper edge of the fourth step surface, and the eighth blade 3.7 is used to form the first hole portion, and two ninth blades 3.8 are radially symmetrically arranged on the upper edge of the fifth step surface, and the ninth blade 3.8 is used to form the end face 1.2 of the countersunk hole; in order to facilitate the withdrawal of the tool and the removal of chips, the hole bottom 1.6 is not a plane, therefore, in order to achieve the forming of the hole bottom 1.6, the three blades of the frustum part are designed to have a certain inclination angle, specifically, the angle a1 between the blade of the fourth blade 3.3 and the cross section is 5°, the angle a3 between the blade of the fifth blade 3.4 and the cross section is 3°, and the cone angle a2 of the frustum part is 60°. The diameter φ7 of the front end face of the frustum part is 14.8±0.05mm, the diameter φ6 of the columnar part is 38.2±0.05mm, the diameter φ5 of the fourth step is 50.2±0.05mm, and the diameter φ4 of the fifth step is 67.5±0.05mm. The distance L3 from the blade edge of the eighth blade 3.7 to the front of the frustum portion is 28.6±0.1 mm, the distance L2 from the blade edge of the ninth blade 3.8 to the front of the frustum portion is 33.6±0.1 mm, and the length L1 of the second blade body 3.2 is 64 mm. Preferably, the model of the fourth blade 3.3 and the fifth blade 3.4 is SPMG050204, and the model of the sixth blade 3.5, the seventh blade 3.6, the eighth blade 3.7 and the ninth blade 3.8 is TCMT110204.

[0031] like Figure 6 and Figure 7 As shown, the chamfering tool 4 includes a third tool body 4.2 and a third tool handle 4.1. The front end of the third tool body 4.2 is symmetrically provided with two tenth blades 4.3 in the radial direction. The tenth blade 4.3 is used for forming the chamfered portion 1.1. The outer diameter φ8 of the third tool body 4.2 is 81 mm, the angle a4 between the blade edges of the tenth blade 4.3 is 50°, and the diameter φ9 between the blade tips of the tenth blade 4.3 is 60 mm.

[0032] Working principle:

[0033] like Figure 3As shown, first, the multi-surface composite countersunk hole is initially formed by using a first drilling and forming tool 2, and a reserved layer 1.7 of a certain thickness is reserved to facilitate subsequent hole expansion and fine processing. During the initial forming, an avoidance angle 1.8 is formed on the inner wall of the hole.

[0034] like Figure 5 As shown, the second drilling and forming tool 3 is then used to finish and expand the hole after the initial forming so that the hole diameter reaches the required size, and the fifth blade 3.4 and the sixth blade 3.5 are used to jointly form the tapered third hole segment 1.5, and the outer cutting edge of the sixth blade 3.5 simultaneously forms the junction of the third hole segment 1.5 and the second hole segment 1.4.

[0035] like Figure 7 As shown, after the inner hole is processed, a chamfering cutter 4 is used to process the outer chamfer, thereby completing the one-time forming of the multi-joint surface composite countersunk hole.

[0036] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A drilling and forming composite tool, used for forming a composite countersink with multiple joint surfaces, wherein the contour of the composite countersink with multiple joint surfaces comprises, from the outside to the inside, a chamfered portion, an end surface, a first hole section, a second hole section, a third hole section and a hole bottom connected in sequence; Features: The drilling and forming composite tool comprises a first drilling and forming tool, a second drilling and forming tool and a chamfering tool, wherein the first drilling and forming tool is used for the preliminary forming of a composite countersunk hole with multiple joint surfaces, the second drilling and forming tool is used for the expansion forming of a composite countersunk hole with multiple joint surfaces, and the chamfering tool is used for the forming of the chamfered portion of a composite countersunk hole with multiple joint surfaces; wherein, The first drilling and forming tool comprises a first tool body, the first tool body is provided with a first step, a second step and a third step in sequence from front to back, two first blades are symmetrically provided in the radial direction on the front end surface of the first step, the first blade is used for milling the bottom surface of the hole, a second blade is provided on the second step surface, the second blade is used for roughly forming the second hole section, two third blades are symmetrically provided in the radial direction on the third step surface, the third blade is used for roughly forming the first hole section, and the forming outer diameters of the first blade, the second blade and the third blade meet the thickness of the reserved layer for preliminary forming of the composite countersunk hole with multiple bonding surfaces; The second drilling and forming tool comprises a second tool body, which is provided with a frustum portion, a columnar portion, a fourth step and a fifth step in sequence from front to back, a fourth blade and two fifth blades are provided on the front end surface of the frustum portion in the circumferential direction, the fourth blade and the fifth blade are used for forming the bottom of the hole, a sixth blade is provided on the front end of the side surface of the frustum portion, a seventh blade is provided on the rear end of the side surface of the frustum portion, and the sum of the lengths of the blades of the sixth blade and the seventh blade is equal to the length of the side surface of the frustum portion, the sixth blade and the seventh blade are used for forming the third conical hole segment, two eighth blades are provided radially symmetrically on the upper surface of the fourth step surface, the eighth blade is used for forming the first hole portion, two ninth blades are provided radially symmetrically on the upper surface of the fifth step surface, the ninth blade is used for forming the end surface of the countersunk hole; The chamfering tool comprises a third tool body, and two tenth blades are symmetrically provided at the front end of the third tool body in the radial direction, and the tenth blade is used for forming the chamfered portion.

2. The drilling and forming composite tool according to claim 1, characterized in that: The diameter φ3 of the first step is 30±0.1 mm, the diameter φ2 of the second step is 35±0.1 mm, and the diameter φ1 of the third step is 47±0.1 mm.

3. The drilling and forming composite tool according to claim 2, characterized in that: The distance H1 between the cutting edges of the first blade and the second blade in the axial direction is 3.83 mm, and the distance H2 between the cutting edges of the second blade and the third blade in the axial direction is 21.9 mm.

4. The drilling and forming composite tool according to claim 1, characterized in that: The included angle a1 between the edge of the fourth blade and the cross section is 5°, the included angle a3 between the edge of the fifth blade and the cross section is 3°, and the cone angle a2 of the frustum is 60°.

5. The drilling and forming composite tool according to claim 4, characterized in that: The diameter φ7 of the front end surface of the frustum portion is 14.8±0.05 mm, the diameter φ6 of the columnar portion is 38.2±0.05 mm, the diameter φ5 of the fourth step is 50.2±0.05 mm, and the diameter φ4 of the fifth step is 67.5±0.05 mm.

6. The drilling and forming composite tool according to claim 5, characterized in that: The distance L3 from the blade edge of the eighth blade to the front of the frustum portion is 28.6±0.1 mm, the distance L2 from the blade edge of the ninth blade to the front of the frustum portion is 33.6±0.1 mm, and the length L1 of the second blade body is 64 mm.

7. The drilling and forming composite tool according to any one of claims 4 to 6, characterized in that: A coolant channel is also provided in the second drilling and forming cutter. The coolant channel extends along the axis and is in a forked tree shape in the second cutter body.

8. The drilling and forming composite tool according to claim 1, characterized in that: The outer diameter φ8 of the third blade body is 81 mm, the included angle a4 between the blade edges of the tenth blade is 50°, and the diameter φ9 between the blade tips of the tenth blade is 60 mm.

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