Compound tool

Abstract

The utility model relates to the technical field of machining, and discloses a compound tool which comprises a tool bar, a first tool bit and a second tool bit, one end of the tool bar is a clamping portion, the other end of the tool bar is coaxially provided with the first tool bit and the second tool bit, the first tool bit is located between the clamping portion of the tool bar and the second tool bit, and the second tool bit is located between the clamping portion of the tool bar and the second tool bit. The first tool bit is used for conducting finish machining on a product. The cutter further comprises a transition part, and the transition part is located between the first cutter head and the second cutter head. The integral structure of the cutter has high strength and machining precision, namely, one cutter can meet the machining requirements of different outlines of a shell, serious jumping caused by loading in the machining process can be prevented, and the machining quality and machining efficiency of products are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, and more specifically, to a composite tool. Background Art

[0002] In the field of 3C electronic products, the outer shells of the products are mostly complex curved structures, or structures that connect straight surfaces and curved surfaces. When processing the outer shell of the product, it is necessary not only to process the outer contour of the side of the product, but also to process the part that connects with the side contour, that is, the upper / lower plane of the product. However, for the processing of such products, 2 to 3 different types of tools are usually required, and the tool type needs to be changed during the processing process to achieve separate processing of different positions of the product contour. This increases the tool change time and seriously affects the processing efficiency. The use of multiple tools also increases the processing cost. In addition, since there is a certain error in the manufacturing accuracy of the tool, the more tools there are, the greater the error, which will also affect the product yield to a certain extent. Summary of the invention

[0003] The purpose of the utility model is to provide a composite tool to solve the technical problems existing in the prior art, so as to meet the different processing requirements of products and improve the processing efficiency and processing quality.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is:

[0005] The utility model provides a composite tool, comprising a tool rod, a first tool head and a second tool head, wherein one end of the tool rod is a clamping portion, and the other end of the tool rod is coaxially provided with the first tool head and the second tool head, the first tool head is located between the clamping portion of the tool rod and the second tool head, and the first tool head is used for finishing a product.

[0006] Furthermore, it also includes a transition portion, which is located between the first cutting head and the second cutting head.

[0007] Furthermore, the outer circumferential surface of the first cutting head is concave inwardly toward the axial direction of the cutting rod to form a concave portion, or convex outwardly toward the axial direction away from the cutting rod to form a convex portion, and a first cutting edge portion is arranged on the surface of the concave portion or the convex portion; the outer circumferential surface of the second cutting head is arranged with a second cutting edge portion.

[0008] Furthermore, the diameter of the tool rod is set to D1, the diameter of the first tool head is D2, the height of the first tool head is H1, and the diameter of the second tool head is D3, then D1 / D2=0.5~1.5, D3 / D2=2~3.5.

[0009] Furthermore, the depth of the concave portion on the first cutter head perpendicular to the axis of the cutter rod is L2, then D2 / L2=2~12; the cutting depth L3 on the second cutter head is L3=((D3-D2) / 2)×2 / 3.

[0010] Furthermore, the number of blades used in the first blade portion is 10 to 100, and the relationship between the number of blades and the diameter of the first cutter head is: 3.14×diameter÷tooth width=maximum number of blades, wherein the number of blades is 1 / 10 maximum number of blades to maximum number of blades; the number of blades used in the second blade portion is 2 to 15.

[0011] Furthermore, the tool rod and the second tool head are both made of tungsten steel, stainless steel or high-speed steel, and the first tool head is made of PCD or CBN.

[0012] Furthermore, a mounting hole is provided on the first cutter head along the axial direction, and the first cutter head is matched with the cutter rod through the mounting hole and is welded.

[0013] Furthermore, the diameter of the tool rod is set to D1, the diameter of the second tool head is D3, the diameter of the first tool head is D4, and the aperture of the mounting hole is D5, then D1 / D5=0.9~1.

[0014] Furthermore, the depth of the recess on the first cutter head perpendicular to the axis of the tool rod is L4, then D4 / L4=6~20, (D4-2×L4) / D1=1~4; the cutting depth L3 on the second cutter head is L3=((D3-D4) / 2)×2 / 3.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The composite tool of the utility model has an overall structure with high strength and processing accuracy, that is, one tool can meet the processing requirements of different shell contours, and the first tool head for fine processing is placed between the clamping part of the tool rod and the second tool head, which can reduce the uneven size and weight of the tool and prevent serious vibration caused by load during processing, thereby improving the processing quality and efficiency of the product and reducing the cost of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme of the utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0018] Figure 1 This is a structural diagram of Example 1 of the composite tool of the utility model.

[0019] Figure 2 It is an exploded view of Example 1 of the composite tool of the utility model.

[0020] Figure 3 It is a schematic diagram of the blade type in the utility model.

[0021] Figure 4 This is an example diagram of the concave portion on the first cutter head of the utility model.

[0022] Figure 5 This is a structural diagram of Example 2 of the composite tool of the present utility model.

[0023] Figure 6 It is an exploded view of Example 2 of the composite tool of the present utility model.

[0024] Among them, 10-tool bar, 20-first tool head, 30-second tool head, 40-transition part, 201-first blade, 301-second blade, 21-third tool head, 211-installation hole. DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For example, the directions or positions indicated by terms such as "length", "width", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the directions or positions shown in the drawings, which are only for the convenience of description and cannot be understood as limitations on the present technical solution.

[0026] The terms "including" and "having" and any variations thereof in the specification and claims of the utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions; the terms "first", "second", etc. in the specification and claims of the utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In the specification and claims of the utility model and the above-mentioned drawings, when an element is referred to as "fixed to" or "mounted on" or "disposed on" or "connected to" another element, it may be directly or indirectly located on the other element. For example, when an element is referred to as "connected to" another element, it may be directly or indirectly connected to the other element.

[0027] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] Embodiment 1

[0029] See also Figure 1 and Figure 2 As shown, the utility model provides a composite tool, including a tool rod 10, a first tool head 20 and a second tool head 30, one end of the tool rod 10 is a clamping portion, the other end of the tool rod 10 is coaxially arranged with the first tool head 20 and the second tool head 30, the first tool head 20 is located between the clamping portion of the tool rod 10 and the second tool head 30, and the first tool head 20 is used for finishing the product.

[0030] In this embodiment, since the product finishing has strict requirements on the tool's anti-jumping ability, by placing the first tool head 20 for finishing between the clamping part of the tool rod 10 and the second tool head 30, the uneven size and weight of the tool can be reduced, and serious jumping due to load during processing can be prevented, thereby improving the processing quality of the product.

[0031] Furthermore, the composite tool also includes a transition portion 40, and the transition portion 40 is located between the first cutter head 20 and the second cutter head 30, so that a gap is formed between the first cutter head 20 and the second cutter head 30 to avoid interference between the two when processing the product.

[0032] Furthermore, the outer peripheral surface of the first cutting head 20 is provided with a first cutting edge portion, which includes a plurality of evenly distributed and spirally arranged first cutting edges 201; the outer peripheral surface of the second cutting head 30 is provided with a second cutting edge portion, which includes a plurality of evenly distributed and spirally arranged second cutting edges 301.

[0033] Furthermore, the outer peripheral surface of the first cutting head 20 is concave inwardly toward the axial direction of the cutting rod 10 to form a concave portion, or is convex outwardly toward the axial direction away from the cutting rod 10 to form a convex portion, and the first cutting edge portion is provided on the surface of the concave portion or the convex portion, which can meet the processing requirements of different positions and different contours of the product surface.

[0034] For further information, see Figure 3As shown, the front angle of the first blade 201 is -5° to 25°, the back angle is 0° to 15°, the helix angle is 0° to 30°, the back angle width is 0.01mm to 0.1mm, the width of the blade teeth is 0.1mm to 2mm, and the height of the blade teeth is 0.1mm to 2mm, which can meet different processing requirements and ensure the processing quality of the tool.

[0035] Furthermore, the number of blades of the first blade 201 is 10 to 100, and the relationship between the number of blades and the diameter of the first cutter head 20 is: 3.14×diameter÷tooth width=maximum number of blades, wherein the number of blades is 1 / 10 maximum number of blades to maximum number of blades, which can meet different processing requirements.

[0036] Furthermore, the front angle of the second blade 301 is -10° to 35°, the back angle is 0° to 25°, the helix angle is 0° to 45°, the back angle width is 0.01mm to 0.1mm, and the number of blades is 2 to 15, which can meet different processing requirements.

[0037] Specifically, the front angle of the first blade 201 can be -5°, 0°, 5°, 10°, 15°, 20°, 25° or any value within the range; the back angle of the first blade 201 can be 0°, 5°, 10°, 15° or any value within the range, which can meet different processing requirements; the helix angle can also be 0°, 15°, 30° or any value within the range, which can meet different processing requirements. Similarly, the blade parameters of the second blade 301 can also take any value within the above range, which can meet different processing requirements.

[0038] Specifically, the back angle width can be 0.01mm, 0.05mm, 0.1mm or any value within the range, and the width and height of the cutting teeth can be 0.1mm, 1mm, 2mm or any value within the range, respectively, so as to meet different processing requirements.

[0039] In the present invention, the first blade 201 and the second blade 301 can have the same blade shape or different blade shapes, and too many blades of the two increase the difficulty of blade forming processing, while too few blades cannot meet the requirements of product processing, that is, the number of blades of the first blade 201 can be 10, 50, 100 blades or any value within the range, and the number of blades of the second blade 301 can be 2,

[0040] 8, 15 blades or any value within the above range can meet different processing requirements and make the tool have reliable structural accuracy and strength.

[0041] Furthermore, the diameter of the tool rod 10 is set to D1, the diameter of the first tool head 20 is D2, the height of the first tool head 20 is H1, and the diameter of the second tool head 30 is D3, that is, D1 / D2=0.5~1.5, D3 / D2=2~3.5, and the specific ratio value can be arbitrarily taken within the range to meet the processing requirements and ensure the overall structural strength of the tool.

[0042] Furthermore, the cutting depth of the second cutter head 30 perpendicular to the axis of the tool rod 10, that is, the depth of the spiral groove on the second cutter head 30 is L3, then L3=((D3-D2) / 2)×2 / 3; the depth of the recess on the first cutter head 20 perpendicular to the axis of the tool rod 10 is L2, then D2 / L2=2~12, and any value can be taken within the range to meet the processing requirements and ensure the overall structural strength.

[0043] Specifically, for the convenience of processing and installation, the tool rod 10, the first tool head 20, the second tool head 30 and the transition part 40 are respectively made of cylindrical bars and are coaxially arranged in sequence. The diameter D1 is 10-12 mm, the diameter D2 is 10-12 mm, and the diameter D3 is 24-30 mm. Any value can be taken within the range to meet different processing requirements, and the diameter of the second tool head 30 is the largest, which is convenient for actual finishing of the product. The height H1 of the first tool head 20 is 10-14 mm, and the height H2 of the second tool head 30 is 4-6 mm, which is convenient for processing the first tool head 20 and the second tool head 30 to form the corresponding first blade portion and the second blade portion.

[0044] Furthermore, the materials of the tool rod 10 and the second tool head 30 are tungsten steel, stainless steel, and high-speed steel, which ensure the rigidity of the tool structure and reduce costs; the material of the first tool head 20 is PCD (polycrystalline diamond) and CBN (cubic boron nitride), which can improve the rigidity and strength of the tool and enable reliable finishing of the product.

[0045] Specifically, in order to meet different processing requirements of products, the first cutter head 20 and the second cutter head 30 are made of materials with different hardness. The first cutting edge portion is formed on the first cutter head 20 by laser processing, and the second cutting edge portion is formed on the second cutter head 30 by grinding, which can ensure the reliability of the overall structure of the tool.

[0046] In this embodiment, the end faces of the tool bar 10, the first tool head 20, the second tool head 30 and the transition part 40 are welded in sequence to form an integral structure, and can be welded together by vacuum brazing or other methods to obtain the overall structure of the tool. The method is simple, reliable and easy to implement. In other embodiments, the second tool head 30 and the transition part 40 can be an integral structure, that is, the transition part 40 is formed by coaxial processing on the second tool head 30.

[0047] In this embodiment, the surface forming the concave portion on the first cutter head 20 may be an arc surface or a circular arc surface to meet the processing requirements of different product contours;

[0048] The surface of the concave portion may further include a first straight surface segment 631, a first arc surface segment 632, and a second arc surface segment 633 ( Figure 4 a), the first straight surface segment 631 is arranged parallel to the axis of the first cutter head 20, and the two ends of the first straight surface segment 631 are arranged opposite to each other and sequentially connected to the first arc surface segment 632 and the second arc surface segment 633 to meet the processing requirements of different product contours;

[0049] The surface of the concave portion may further include a curved surface segment 641, a first inclined surface segment 642, a second inclined surface segment 643 ( Figure 4 b), the first bevel segment 642 and the second bevel segment 643 are sequentially arranged and connected along the tangent direction of the two ends of the arc segment 641 to meet the processing requirements of different product contours;

[0050] The surface of the concave portion may further include a second straight surface segment 651, a third arc surface segment 652, a fourth arc surface segment 653, a third inclined surface segment 654, and a fourth inclined surface segment 655 ( Figure 4 c), the second straight surface segment 651 is arranged parallel to the axis of the first cutting head 20, and the two ends of the second straight surface segment 651 are arranged opposite to each other and connected in sequence to the third arc surface segment 652 and the fourth arc surface segment 653; the third inclined surface segment 654 is arranged along the tangent direction of the third arc surface segment 652 away from the end of the second straight surface segment 651, and the fourth inclined surface segment 655 is arranged along the tangent direction of the fourth arc surface segment 653 away from the end of the second straight surface segment 651, so as to meet the processing requirements of different product contours.

[0051] Embodiment 2

[0052] The difference between the second embodiment and the first embodiment lies in the connection method between the first blade head 20 and the blade rod 10. Figure 5 and Figure 6 As shown, a mounting hole 211 is axially arranged on the third cutter head 21 , and the third cutter head 21 is mounted in cooperation with the cutter rod 10 through the mounting hole 211 and welded into an integral structure.

[0053] Specifically, by welding the hole wall of the mounting hole 211 on the third cutter head 21 and the outer wall of the cutter rod 10 into one, the welding area between the third cutter head 21 and the cutter rod 10 can be increased, and the phenomenon of desoldering due to welding defects such as uneven solder can be reduced, thereby improving the reliability of welding.

[0054] Specifically, the diameter of the third tool head 21 is D4, and the aperture is D5, then D1 / D5=0.9~1, and any value can be taken within the range to meet different processing requirements; the diameter of the transition portion 40 is D6, D6≤D4, to ensure the rigidity and strength of the overall structure of the tool.

[0055] Specifically, the depth of the recess on the third cutting head 21 perpendicular to the axis of the cutting rod 10 is L4, then D4 / L4=6~20, (D4-2×L4) / D1=1~4; the cutting depth L3 on the second cutting head 30=((D3-D4) / 2)×2 / 3.

[0056] In this embodiment, the diameter D1 of the tool rod 10 is 6-12 mm, the diameter D3 of the second tool head 30 is 30-35 mm, and the diameter D4 of the third tool head 21 is 19-24 mm, which is convenient for processing and can ensure the rigidity and strength of the overall structure of the tool.

[0057] The composite tool provided by the utility model can realize the processing requirements of different contours through the first tool head 20 and the second tool head 30, that is, one tool can meet the processing requirements of different contours of the shell, the overall structure has high strength and processing accuracy, and can ensure processing efficiency and processing accuracy.

[0058] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A composite tool, Features: It includes a tool rod, a first tool head and a second tool head. One end of the tool rod is a clamping part, and the other end of the tool rod is coaxially arranged with the first tool head and the second tool head. The first tool head is located between the clamping part of the tool rod and the second tool head. The first tool head is used for finishing the product.

2. The composite tool according to claim 1, Features: A transition portion is also included, and the transition portion is located between the first tool head and the second tool head.

3. The composite tool according to claim 1 or 2, Features: The outer circumferential surface of the first cutter head is concave inwardly toward the axial direction of the cutter rod to form a concave portion, or convex outwardly toward the axial direction away from the cutter rod to form a convex portion, and a first blade portion is arranged on the surface of the concave portion or the convex portion; the outer circumferential surface of the second cutter head is arranged with a second blade portion.

4. The composite tool according to claim 3, Features: The diameter of the tool rod is set to D1, the diameter of the first tool head is D2, the height of the first tool head is H1, and the diameter of the second tool head is D3, then D1 / D2=0.5-1.5, D3 / D2=2-3.

5.

5. The composite tool according to claim 4, Features: The depth of the concave portion on the first cutter head perpendicular to the axis of the cutter bar is L2, then D2 / L2=2~12; the cutting depth of the second cutter head is L3=((D3-D2) / 2)×2 / 3.

6. The composite tool according to claim 3, Features: The number of blades used in the first blade portion is 10 to 100, and the relationship between the number of blades and the diameter of the first cutter head is: 3.14×diameter÷tooth width=maximum number of blades, wherein the number of blades is 1 / 10 maximum number of blades to maximum number of blades; the number of blades used in the second blade portion is 2 to 15.

7. The composite tool according to claim 1, Features: The materials of the tool rod and the second tool head are tungsten steel, stainless steel or high-speed steel, and the material of the first tool head is PCD or CBN.

8. The composite tool according to claim 3, Features: The first cutter head is provided with a mounting hole in the axial direction, and the first cutter head is matched with the cutter rod through the mounting hole and is welded.

9. The composite tool according to claim 8, Features: The diameter of the tool rod is set to D1, the diameter of the second tool head is D3, the diameter of the first tool head is D4, and the aperture of the mounting hole is D5, then D1 / D5=0.9~1.

10. The composite tool according to claim 9, Features: The depth of the concave portion on the first cutter head perpendicular to the axis of the cutter rod is L4, then D4 / L4=6~20, (D4-2×L4) / D1=1~4; the cutting depth L3 on the second cutter head is L3=((D3-D4) / 2)×2 / 3.

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