Floating cutter handle

Abstract

The utility model provides a floating cutter handle, and belongs to the technical field of numerical control machining. The floating cutter handle comprises a cutter handle main body, a cutter core shaft and a limiting block, the front section of the knife handle body is a cylindrical section part, and the rear section of the knife handle body is a conical section part of which the diameter is gradually reduced; a first blind hole is formed in the cylindrical section part; a rectangular through hole is formed in the cylindrical section part in the diameter direction of the cylindrical section part; the cutter mandrel is matched with the first blind hole to form an oil storage cavity; a rectangular groove is formed in the position, corresponding to the rectangular through hole, of the circumferential outer wall of the part, located in the first blind hole, of the cutter core shaft. The width of the rectangular groove is larger than that of the rectangular through hole; the limiting block is arranged in a combined structure of the rectangular through hole and the rectangular groove in a matched mode. The telescopic cutter has the advantages of being telescopic and capable of being flexibly machined, and the problem that a traditional elastic collet chuck is poor in cutter fixing effect due to clamping errors can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to numerical control processing technical field especially, relates to a floating tool shank. BACKGROUND

[0002] Numerical control processing refers to a kind of process method of carrying out part processing on numerical control machine tool, it can solve the problems such as many varieties of parts, small batch, complex shape, high precision requirement, realize efficient and automatic processing.Numerical control tool shank is the component for fixing and installing tool in numerical control machine tool, most of the existing numerical control tool shanks adopt tool shank cylinder clamp type locking mode, elastic cylinder clamp is installed in the hole position of tool shank, tool is clamped and fixed by elastic cylinder clamp, so there can be clamping error between elastic cylinder clamp and tool shank, and the fixing effect is not good.On the other hand, the position of tool is always fixed, and cannot meet the processing needs of flexible processing of users. SUMMARY

[0003] The utility model provides a floating tool shank to solve the problems in prior art, with the characteristics of telescopic and flexible processing, and can avoid the problem of poor tool fixing effect caused by clamping error of traditional elastic cylinder clamp.

[0004] The technical scheme adopted by the utility model is:

[0005] A floating tool shank, comprising:

[0006] Tool shank main body, the front section of the tool shank body is cylindrical section, and the diameter of the rear section tapered section gradually reduces; from the end face of the cylindrical section, a first blind hole with smooth inner wall is opened along the axial center direction of the tool shank body; a square hole is opened on the cylindrical section along the diameter direction of itself;

[0007] Tool spindle, the tool spindle is a closed barrel structure at one end, and its diameter is basically consistent with the inner diameter of the first blind hole; a part of the tool spindle is located in the first blind hole, and there is a gap between the outer side of the axial length direction closed end of the tool spindle and the bottom of the first blind hole to form an oil storage cavity; the oil storage cavity is filled with lubricating oil occupying 99% or more of its volume; a rectangular groove is opened on the circumferential outer wall of the tool spindle part located in the first blind hole at the position corresponding to the square hole; the groove width of the rectangular groove is greater than the width of the square hole;

[0008] Limiting block, the limiting block is arranged in the square hole in cooperation, and the one end thereof towards the tool spindle extends out of the square hole and is inserted into the rectangular groove.

[0009] Further, the first blind hole has a depth greater than the axial length of the cylindrical section; an oil injection hole is formed on the corresponding tapered section adjacent to the bottom of the first blind hole; a plug is fitted in the oil injection hole.

[0010] Further, the cylindrical section has at least two rectangular through holes formed uniformly along the diameter direction of the cylindrical section.

[0011] Further, a second blind hole with a threaded inner wall is formed on the end surface of the cylindrical section in a direction parallel to the axial center direction of the tool shank body, the second blind hole penetrating the corresponding rectangular through hole; a fitting through hole is formed on the limiting block at a position corresponding to the second blind hole; a threaded rod is fitted in the combined structure of the second blind hole and the corresponding through hole.

[0012] Further, two opposite sides of the circumferential outer wall of the tool mandrel part outside the first blind hole are provided with penetrating threaded locking holes.

[0013] Further, a third blind hole is formed on the end surface of the tapered section in the axial center direction of the tool shank body, and a puller is fitted at the third blind hole.

[0014] Further, a corresponding first annular groove and a second annular groove are formed on the circumferential outer wall adjacent to the closed end of the tool mandrel and on the inner wall of the corresponding first blind hole, respectively; the groove width of the first annular groove is greater than that of the second annular groove; a corresponding flexible sealing ring is further provided in the combined structure of the first annular groove and the second annular groove.

[0015] Further, a first annular groove is formed on the circumferential outer wall of the closed end of the tool mandrel, and a flexible sealing ring is fitted.

[0016] Further, a second annular groove is formed on the inner wall of the first blind hole, and a flexible sealing ring is fitted.

[0017] Further, the flexible sealing ring is provided with one or more.

[0018] The beneficial effects of the present application are as follows:

[0019] The floating tool handle in the utility model adopts the cooperation of the tool mandrel and the limiting block to realize tool installation, and can avoid the problem of poor tool fixing effect caused by clamping error of the traditional elastic collet; on the other hand, when the limiting block is located in the combination structure of the rectangular through hole and the rectangular, the slot width of the rectangular groove is larger than the width of the rectangular through hole, so that the tool mandrel has a certain space for axial length movement, the tool mandrel is telescopic, the tool has a certain flexibility, the processing requirement of flexible processing of the user can be met, and the telescopic and flexible processing characteristics are achieved; meanwhile, the almost full lubricating oil in the oil storage cavity can provide flexible reaction force in the tool mandrel movement process, so as to maintain the reliability of the tool mandrel in use. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 It is a front view of the floating tool handle in the embodiment.

[0022] Figure 2 It is Figure 1 A-A sectional view in the embodiment.

[0023] Figure 3 It is Figure 1 B-B sectional view in the embodiment.

[0024] Figure 4 It is a three-dimensional structure schematic view of the floating tool handle in the embodiment.

[0025] Figure 5 It is an explosion structure schematic view of the embodiment.

[0026] The drawings are:

[0027] 100-tool handle body, 200-lift, 300-tool mandrel, 400-limiting block.

[0028] 110-cylindrical section, 111-first blind hole, 112-rectangular through hole, 113-second blind hole, 114-second annular groove.

[0029] 120-conical section, 121-oil injection hole, 122-third blind hole, 123-oil storage cavity.

[0030] 310-rectangular groove, 320-thread locking hole, 330-first annular groove.

[0031] 410 - through hole. DETAILED DESCRIPTION

[0032] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0033] The following disclosure provides many different embodiments or examples for implementing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of a specific example are described below. Of course, they are only examples, and the purpose is not to limit the utility model.

[0034] The embodiments of the utility model will be described in detail below in combination with the drawings.

[0035] Figure 1 It is a front view of the floating tool shank in the embodiment. Figure 2 It is a Figure 1 It is a sectional view along A-A direction. Figure 3 It is a Figure 1 It is a sectional view along B-B direction. Figure 4 It is a three-dimensional structure schematic view of the floating tool shank in the embodiment. Figure 5 It is an exploded structure schematic view of the floating in the embodiment. As shown in Figures 1 to 5 The floating tool shank includes a tool shank body 100, a puller 200, a tool mandrel 300 and a limiting block 400. The puller 200 and the tool mandrel 300 are respectively located at two sides of the tool shank body 100.

[0036] The components of the floating tool shank will be described in detail below.

[0037] As shown in Figure 2 , Figure 3 and Figure 5As shown, the front section (the side where the tool is mounted) of the tool holder body 100 is a cylindrical section 110 of equal diameter, and the rear section of the tool holder body 100 is a tapered section 120 with a gradually decreasing diameter. Starting from the end face of the cylindrical section 110, a first blind hole 111 with a smooth inner wall is formed along the axial center direction of the tool holder body 100; the depth (axial length) of the first blind hole 111 is greater than the axial length of the cylindrical section 110, that is, the first blind hole 111 extends into the region of the tapered section 120. An oil filling hole 121 is formed on the tapered section 120 corresponding to the bottom of the first blind hole 111, and a plug (not shown in the figure) is fitted inside the oil filling hole 121. Near the opening end of the first blind hole 111, at least two rectangular through holes 112 are formed on the cylindrical section 110 along its own diameter direction. The rectangular through holes 112 are evenly distributed in the circumferential direction, for example... Figure 3 The diagram shows a total of three rectangular through holes. Starting from the end face of the cylindrical section 110, three second blind holes 113 with threaded inner walls are provided in a direction parallel to the axial center direction of the tool holder body 100. Each second blind hole 113 extends into a corresponding rectangular through hole 112; that is, the second blind hole 113 intersects and connects with the corresponding rectangular through hole 112. For example... Figure 2 and Figure 5 As shown, starting from the end face of the tapered section 120, a third blind hole 122 with a threaded inner wall is provided along the axial center direction of the tool holder body 100. The depth of the second blind hole 140 is less than the axial length of the tapered section 120.

[0038] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a portion of the pull head 200 is threaded into the third blind hole 122.

[0039] like Figures 1 to 5As shown in the drawings, the tool mandrel 300 is roughly in a closed-end cylindrical structure, and its diameter is roughly consistent with the inner diameter of the first blind hole 111. The tool mandrel 300 is partially located in the first blind hole 111, and the remaining part is located outside the first blind hole 111. When the tool mandrel 300 is arranged in the first blind hole 111, there is a gap between the outside of the closed end of the tool mandrel 300 in the axial direction and the bottom of the first blind hole 111, and the gap forms an oil storage cavity 123, and the oil injection hole 121 is in communication with the oil storage cavity 123. Meanwhile, a rectangular recess 310 is arranged on the circumferential outer wall of the part of the tool mandrel 300 located in the first blind hole 111 at a position corresponding to the rectangular through hole 112, and the slot width (the size in the axial direction of the tool mandrel 300) of the rectangular recess 310 is larger than the width (the size in the axial direction of the tool handle body 100) of the rectangular through hole 112, for example, the slot width of the rectangular recess 310 is 1-2 mm larger than the width of the rectangular through hole 112. Threaded locking holes 320 are arranged on the circumferential outer wall of the part of the tool mandrel 300 located outside the first blind hole 111 at opposite sides.

[0040] As shown in the drawings, Figure 1 , Figure 3 , Figure 4 and Figure 5 , the limiting blocks 400 are arranged in the rectangular through holes 112 in a matched manner respectively, and the one end of the limiting block 400 extending towards the tool mandrel 300 extends out of the rectangular through hole 112 and is inserted into the rectangular recess 310, so as to fix the tool mandrel 300 by the limiting block 400. Meanwhile, a matched through hole 410 is arranged on the limiting block 400 at a position corresponding to the second blind hole 113, and the position of the limiting block 400 can be locked by rotating a threaded rod into the combined structure of the second blind hole 113 and the through hole 410, so as to prevent the limiting block 400 from being pulled out.

[0041] When the floating tool handle in the embodiment is used, after the tool mandrel 300 is inserted into the first blind hole 111, the limiting block 400 is inserted and the threaded rod is rotated into the combined structure of the second blind hole 113 and the through hole 410, so as to lock the limiting block 400 and the tool mandrel 300. The tool is inserted into the tool mandrel 300 and the locking screw is rotated into the threaded locking hole 320 in a matched manner, so as to lock the tool. About 99% of the volume of the lubricating oil is injected into the oil storage cavity 123, and the plug is rotated into the oil injection hole 121 in a matched manner, so as to complete the assembly.

[0042] The floating tool holder in the embodiment adopts the cooperation of the tool mandrel and the limiting block to realize tool installation, which can avoid the problem of poor tool fixing effect caused by clamping error of the traditional elastic collet; on the other hand, when the limiting block is located in the combined structure of the rectangular through hole and the rectangular recess, the tool mandrel has a certain space for movement in the axial direction because the groove width of the rectangular recess is larger than the width of the rectangular through hole, so the tool mandrel is telescopic, which makes the tool have a certain flexibility and can meet the processing requirements of flexible processing of users, and has the characteristics of telescopic and flexible processing; at the same time, the almost full lubricating oil in the oil storage cavity can provide a flexible reaction force during the movement of the tool mandrel to maintain the reliability of the tool mandrel in use.

[0043] Further, in order to prevent the problem of leakage of lubricating oil in the oil storage cavity, a corresponding first annular groove 330 and a second annular groove 114 are respectively formed on the circumferential outer wall of the closed end of the tool mandrel 300 and the inner wall of the corresponding first blind hole 111; the groove width (the size in the axial direction of the tool mandrel 300) of the first annular groove 330 is larger than the groove width (the size in the axial direction of the tool holder body 100) of the second annular groove 114, for example, the groove width of the first annular groove 330 is 1-2mm larger than the groove width of the second annular groove 114, to meet the movement requirement of the tool mandrel 100. At the same time, a corresponding flexible sealing ring (not shown in the figure) is also arranged in the combined structure of the first annular groove 330 and the second annular groove 114. In the embodiment, the first annular groove 330 can also be formed on the circumferential outer wall of the closed end of the tool mandrel 300 according to the requirement, and a corresponding flexible sealing ring is arranged, or the second annular groove 114 is formed on the inner wall of the first blind hole 111 and a corresponding flexible sealing ring is arranged. Moreover, the first annular groove 330, the second annular groove 114 and the corresponding oil sealing ring can be arranged independently in multiple levels to form multi-level sealing, for example, as shown in the figure, three-level sealing is formed. Figure 2 ​

Claims

1. A floating tool shank, characterized in that include: The main body of the knife handle has a cylindrical section at the front and a tapered section with a gradually decreasing diameter at the rear. A first blind hole with a smooth inner wall is formed along the axial center direction of the main body of the knife handle, starting from the end face of the cylindrical section. A rectangular through hole is formed along the diameter direction of the cylindrical section. The tool mandrel is a cylindrical structure closed at one end, with a diameter approximately the same as the inner diameter of the first blind hole. A portion of the tool mandrel is located within the first blind hole, and a gap exists between the outer side of its closed end along its axial length and the bottom of the first blind hole, forming an oil reservoir. The oil reservoir is filled with lubricating oil occupying 99% or more of its volume. A rectangular groove is formed on the outer circumferential wall of the portion of the tool mandrel located within the first blind hole at a position corresponding to the rectangular through hole. The width of the rectangular groove is larger than the width of the rectangular through hole. A limiting block is provided in the rectangular through hole, with one end of it extending out of the rectangular through hole and inserted into the rectangular groove.

2. The floating tool shank according to claim 1, characterized in that The depth of the first blind hole is greater than the axial length of the cylindrical section; an oil injection hole is provided on the conical section corresponding to the bottom of the first blind hole; a plug is fitted inside the oil injection hole.

3. The floating tool shank according to claim 1, characterized in that At least two rectangular through holes are uniformly formed along the diameter of the cylindrical section.

4. The floating tool shank according to claim 1, characterized in that Starting from the end face of the cylindrical section, a second blind hole with a threaded inner wall is provided in a direction parallel to the axial center direction of the tool holder body. The second blind hole extends to the corresponding rectangular through hole. A matching through hole is provided on the limiting block at the position corresponding to the second blind hole. A matching threaded rod is provided in the combination structure of the second blind hole and the corresponding through hole.

5. The floating tool shank according to claim 1, wherein On the outer circumferential wall of the tool spindle portion located outside the first blind hole, corresponding threaded locking holes are provided on opposite sides.

6. The floating tool shank according to claim 1, wherein Starting from the end face of the tapered section, a third blind hole is provided along the axial center direction of the tool holder body, and a pull head is provided at the third blind hole.

7. The floating tool shank according to claim 1, wherein A first annular groove and a second annular groove are respectively provided on the outer circumference of the closed end of the tool spindle and on the inner wall of the corresponding first blind hole; the groove width of the first annular groove is larger than the groove width of the second annular groove; a corresponding flexible sealing ring is also provided in the combined structure of the first annular groove and the second annular groove.

8. The floating tool shank according to claim 1, wherein The closed end of the tool spindle has a first annular groove on its outer circumferential wall and a matching flexible sealing ring.

9. The floating tool shank according to claim 1, wherein A second annular groove is formed on the inner wall of the first blind hole, and a matching flexible sealing ring is provided.

10. The floating tool holder according to any one of claims 7-9, characterized in that, The flexible sealing ring is provided with one or more rings.

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