A flexible variable diameter forming tool

Abstract

The present application provides a flexible variable diameter forming tool, which includes: a tool holder, the interior of which is hollow to form a mounting cavity; at least one movable tool holder, the movable tool holder being mounted in the mounting cavity and slidably connected to the tool holder; a blade, the blade being mounted on the movable tool holder; a first positioning member, the first positioning member being arranged on the tool holder and used to limit the axial position of the movable tool holder in the mounting cavity; a second positioning member, the second positioning member moving along the axial direction of the tool holder to limit the radial position of the movable tool holder in the mounting cavity; wherein a first side hole communicating with the mounting cavity is provided on the side of the tool holder, and one end of the movable tool holder having the blade mounted thereon passes through the first side hole and extends to the outside of the tool holder. The tool of the present application can adjust the tool size according to the processing requirements of the workpiece, thereby reducing the cost of processing radially variable curvature workpieces for enterprises.

Description

Technical Field

[0001] The present application relates to the technical field of radial variable curvature workpiece processing, and in particular to a flexible variable diameter forming tool. Background Art

[0002] Under certain working conditions, workpieces with varying radial curvatures must be machined. If the tool diameter is larger than the minimum radial curvature of the cavity, overcutting can occur. A significant difference between the tool diameter and the minimum radial curvature increases machining time. Especially for workpieces with variable curvature, such as undercuts, the tool diameter must be smaller than the minimum radial curvature, while also ensuring that the blade and shank do not collide with the undercut wall.

[0003] At present, for the processing of radial variable curvature workpieces, the method of replacing tools with different diameters is generally adopted, that is, the tool needs to be withdrawn after each processing and replaced with a tool of appropriate size for processing.

[0004] This processing method requires a variety of cutting tools of different sizes, which will significantly increase processing costs. Summary of the Invention

[0005] The present application provides a flexible variable diameter forming tool to solve the problem of needing to be equipped with a variety of tools of different sizes for replacement processing for variable curvature cavities.

[0006] The present application provides a flexible variable diameter forming tool, comprising:

[0007] A tool holder, wherein the interior of the tool holder is hollow to form a mounting cavity;

[0008] at least one movable knife seat, the movable knife seat being installed in the installation cavity and being slidably connected to the knife holder;

[0009] a blade, the blade being mounted on the movable blade seat;

[0010] a first positioning member, the first positioning member being slidably connected to the movable knife seat to limit the axial position of the movable knife seat in the mounting cavity;

[0011] a second positioning member, the second positioning member moving along the axial direction of the tool holder to limit the radial position of the movable tool holder in the mounting cavity;

[0012] A first side hole communicating with the mounting cavity is provided on the side of the tool holder, and one end of the movable tool holder on which the blade is mounted passes through the first side hole and extends to the outside of the tool holder.

[0013] In one possible design, the first positioning member includes a first positioning portion arranged at the bottom of the mounting cavity, and the movable knife seat is provided with a second positioning portion that cooperates with the first positioning portion. The first positioning portion is slidably connected to the second positioning portion, and the length directions of the first positioning portion and the second positioning portion are parallel to the moving trajectory of the movable knife seat.

[0014] In a possible design, one of the first positioning portion and the second positioning portion is a dovetail groove, and the other is a positioning track that cooperates with the dovetail groove.

[0015] In a possible design, the bottom of the movable tool holder and the bottom of the tool holder are both provided with first threaded holes that cooperate with each other.

[0016] In one possible design, the second positioning member includes a pressure block located above the movable tool holder, the pressure block is provided with a third positioning portion, and the movable tool holder is provided with multiple fourth positioning portions. According to the relative position of the movable tool holder and the tool holder, the fourth positioning portion engaged with the third positioning portion is changed.

[0017] In a possible design, one of the third positioning portion and the fourth positioning portion is a protrusion, and the other is a groove for the protrusion to be inserted into.

[0018] In a possible design, the protrusion is configured as a V-shaped block, and the groove is configured as a V-shaped groove that matches the shape of the protrusion.

[0019] In a possible design, the pressure block is rotatably connected to the mounting cavity, the groove is arranged in an arc shape, and a second side hole connected to the mounting cavity is provided on the tool holder, the second side hole includes a first limiting portion extending along the axial direction of the tool holder, and a second limiting portion and a third limiting portion that coincide with the rotation trajectory of the pressure block, the second limiting portion and the third limiting portion are arranged in an upper and lower relationship, and are both connected to the first limiting portion, and a positioning block slidably connected to the second side hole is provided on the side of the pressure block.

[0020] In a possible design, the top of the installation cavity is opened, the tool holder is detachably connected to a top cover, and the top cover, the pressure block and the tool holder are all provided with second threaded holes that cooperate with each other.

[0021] In a possible design, a compression spring is provided between the top cover and the pressure block.

[0022] The flexible variable diameter forming tool provided by the present application includes a tool holder, a movable tool seat, a first positioning member and a second positioning member, and the blade used for processing the workpiece is fixed on the movable tool seat, and the movable tool seat can move radially along the tool holder. During the processing, according to the size of the workpiece to be processed, the movable tool seat is moved until the position of the blade is adapted to the workpiece. The first positioning member and the second positioning member are used to limit the position of the movable tool seat, so that the blade remains in the corresponding position without moving during the processing, thereby ensuring the processing effect. When the size of the workpiece changes, the restrictions on the movable tool seat by the first positioning member and the second positioning member are directly released, and the position of the movable tool seat is readjusted without replacing the tool. That is, only one tool needs to be configured to adapt to the processing of workpieces with changing inner diameters, which greatly reduces the number of tools equipped and reduces the processing cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0024] Figure 1 This is a schematic diagram of the workpiece structure with varying radial curvature;

[0025] Figure 2 It is a schematic diagram of the structure of an undercut variable curvature workpiece;

[0026] Figure 3 A schematic diagram of the three-dimensional structure of a flexible variable diameter forming tool provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the three-dimensional structure of a movable tool holder for a flexible variable diameter forming tool provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the bottom structure of a movable tool holder of a flexible variable diameter forming tool provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of the internal structure of the tool holder of the flexible variable diameter forming tool provided in an embodiment of the present application;

[0030] Figure 7 Schematic diagram of the cross-sectional structure of the flexible variable diameter forming tool provided in the embodiment of the present application Figure 1 ;

[0031] Figure 8 Schematic diagram of the cross-sectional structure of the flexible variable diameter forming tool provided in the embodiment of the present application Figure 2 ;

[0032] Figure 9 Schematic diagram of the three-dimensional structure of the pressing block of the flexible variable diameter forming tool provided in an embodiment of the present application.

[0033] Reference numerals:

[0034] 100- tool holder, 101- mounting cavity, 102- first side hole, 200- movable tool holder, 201- second positioning portion, 202- fourth positioning portion, 203- first threaded hole, 300- blade, 401- first positioning portion, 500- pressure block, 501- third positioning portion, 502- positioning block, 600- second side hole, 601- first limiting portion, 602- second limiting portion, 603- third limiting portion, 700- top cover, 701- second threaded hole, 800- compression spring.

[0035] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0036] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0037] For some special workpieces, such as Figure 1 For workpieces with varying radial curvature, if the diameter of the machining tool is larger than the minimum curvature value of the radial cavity, overcutting will occur on the part. If the diameter of the machining tool is significantly different from the minimum curvature value of the radial cavity, the machining time will increase. Figure 2 The undercut variable curvature workpieces shown in the figure place even stricter demands on machining tools. Not only must the tool diameter be smaller than the workpiece's minimum radial curvature, but the tool shank must also avoid collision with the undercut wall. In other words, machining radially variable curvature workpieces requires constant replacement of tools with different diameters as the workpiece's radial curvature increases or decreases. This necessitates preparing multiple sets of tools with varying diameters based on the workpiece's size before machining, significantly increasing machining costs.

[0038] In order to avoid the above problems, the present application provides a flexible variable diameter forming tool, which includes a tool holder, a movable tool seat, a first positioning member and a second positioning member. The blade is fixed on the movable tool seat. When processing the workpiece, the relative position of the movable tool seat and the tool holder is adaptively adjusted according to the radial curvature of the workpiece to be processed, so that the size reached by the blade during processing is adapted to the workpiece, and the first positioning member and the second positioning member are used to limit the position of the movable tool seat to prevent the blade from being displaced during the processing process, thereby ensuring the stability of the processing, thereby achieving the purpose of processing the radial variable curvature workpiece with only a single tool.

[0039] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0040] Figure 3 For a schematic diagram of the three-dimensional structure of the flexible variable diameter forming tool provided in the embodiment of the present application, please refer to Figure 3 As shown, the flexible variable diameter forming tool provided in the embodiment of the present application includes a tool holder 100, a movable tool holder 200, a blade 300, a first positioning member and a second positioning member.

[0041] The tool holder 100 supports the tool and is connected to the tool bar, which drives the tool bar to process the workpiece. The tool holder 100 is hollowed out to form a mounting cavity 101. A movable tool holder 200 is mounted within the mounting cavity 101. The blade 300 is fixed to the movable tool holder 200 and is moved by the movable tool holder 200 to adjust the tool size.

[0042] Of course, a gasket may also be provided on the movable blade seat 200 to assist in the installation of the blade 300 .

[0043] Specifically, a first side hole 102 is opened on the side of the installation cavity 101, and the movable tool holder 200 can slide in the installation cavity 101, that is, the movable tool holder 200 is slidably connected to the tool holder 100, and one end of the movable holder equipped with a blade 300 can extend to the outside of the installation cavity 101 through the first side hole 102 to process the workpiece. When processing a radially variable curvature workpiece, it is only necessary to move the movable tool holder 100 forward or backward along the radial direction of the tool holder 100 and adjust the relative distance between the blade 300 and the tool holder 100, thereby achieving the purpose of processing radially variable curvature workpieces with a single tool, greatly reducing the number of tools equipped.

[0044] The number of movable knife seats 200 can be selected according to usage requirements, such as 1, 2, 3, 6, etc., without any special restrictions.

[0045] The first positioning member is provided on the tool holder 100 and is used to limit the axial position of the movable tool holder 200 within the mounting cavity 101, that is, to prevent the movable tool holder 200 from being displaced in the vertical direction during use. The second positioning member can move along the axial direction of the tool holder 100, that is, it can move up and down in the vertical direction, to limit the radial position of the movable tool holder 200 within the mounting cavity 101, that is, to prevent the movable tool holder 200 from being displaced in the horizontal direction during use.

[0046] During processing, first determine the required tool size according to the size of the workpiece to be processed, then move the movable tool holder 200 so that the movable tool holder 200 drives the blade 300 to move to an appropriate position, and then limit the axial position of the movable tool holder 200 by the first positioning member, and limit the radial position of the movable tool holder 200 by the second positioning member, so that the workpiece can be processed by the tool. When the size of the tool needs to be changed, first release the restrictions on the position of the movable tool holder 200 by the first and second positioning members, and then move the movable tool holder 200 so that the blade 300 is in an appropriate position. At this time, the position of the movable tool holder 200 can be restricted by the first and second positioning members.

[0047] The flexible variable diameter forming tool in this embodiment includes a tool holder 100, a movable tool holder 200, a first positioning member and a second positioning member, and the blade 300 used for processing the workpiece is fixed on the movable tool holder 200. The movable tool holder can move radially along the tool holder 100. During the processing, according to the size of the workpiece to be processed, the movable tool holder 200 is moved until the position of the blade 300 is adapted to the workpiece. The first positioning member and the second positioning member are used to limit the position of the movable tool holder 200, so that the blade 300 remains in the corresponding position without moving during the processing, thereby ensuring the processing effect. When the size of the workpiece changes, the restrictions on the movable tool holder 200 by the first positioning member and the second positioning member are directly released, and the position of the movable tool holder 200 is readjusted without replacing the tool. That is, only one tool is needed to adapt to the processing of workpieces with changing inner diameters, which greatly reduces the number of tools and reduces the processing costs of the enterprise.

[0048] Figure 4 A schematic diagram of the three-dimensional structure of the movable tool holder 200 of the flexible variable diameter forming tool provided in an embodiment of the present application; Figure 6 Schematic diagram of the internal structure of the tool holder 100 of the flexible variable diameter forming tool provided in an embodiment of the present application.

[0049] See Figure 4 and Figure 6As shown in FIG. 1 , as a specific embodiment of the first positioning member, the first positioning member includes a first positioning portion 401 provided at the bottom of the installation cavity 101 , and a second positioning portion 201 cooperating with the first positioning portion 401 is provided on the movable tool holder 200 .

[0050] The first positioning portion 401 can be configured as a slide rail, and the second positioning portion 201 can be configured as a slide groove. When the movable tool holder 200 is installed in the mounting cavity 101, the slide groove engages with the slide rail. The slide rail can be configured as an I-shaped rail, and the shape of the slide groove is adapted to the slide rail. Of course, the first positioning portion 401 can also be a slide groove, and the second positioning portion 201 can be a slide rail, depending on the processing convenience and other conditions.

[0051] During assembly, the movable blade holder 200 is directly inserted into the installation cavity 101 through the first side hole 102 .

[0052] The first positioning portion 401 can also be set as a positioning rail, and the second positioning portion 201 can be set as a dovetail groove, and the shape of the positioning rail matches the dovetail groove. Of course, the first positioning portion 401 can also be a dovetail groove, and the second positioning portion 201 can be a positioning rail.

[0053] Of course, no matter whether it is set in the form of a slide rail or a dovetail groove, the length direction of the first positioning part 401 and the second positioning part 201 needs to be parallel to the moving trajectory of the movable tool holder 200, so as to limit the radial position of the movable tool holder 200 while guiding the movable tool holder 200 to adjust its position.

[0054] Figure 5 Schematic diagram of the bottom structure of the movable tool holder 200 of the flexible variable diameter forming tool provided in an embodiment of the present application.

[0055] Based on the previous example, see Figure 4 and Figure 5 As shown, the bottom of the movable tool holder 200 and the bottom of the tool holder 100 are both provided with first threaded holes 203 that cooperate with each other. After the movable tool holder 200 is adjusted to the specified position, screws can be used to cooperate with the first threaded holes 203 at the bottom of the movable tool holder 200 and the bottom of the tool holder 100 to fix the movable tool holder 200 and the tool holder 100 to improve the fixing effect of the movable tool holder 200.

[0056] Of course, the first threaded hole 203 can be directly set on the first positioning portion 401 and arranged along the length direction of the first positioning portion 401. Of course, the first threaded hole 203 penetrates the first positioning portion 401 and the bottom plate of the tool holder 100, so that the screw can be screwed directly from the bottom of the tool holder 100 to fix the movable tool holder 200. The first threaded hole 203 on the movable tool holder 200 can be a blind hole or a through hole, which can be relatively set on the second positioning portion 201. Of course, the first threaded hole 203 on the tool holder 100 is preferably set as an inward groove on the bottom side of the tool holder 100 to prevent the screw head from protruding outside the tool holder 100 and interfering with the processing surface.

[0057] In addition, the first positioning member can also be directly replaced by a threaded hole, but this method cannot limit the moving trajectory of the movable tool holder 200, which is inconvenient when adjusting the position of the movable tool holder 200, and the movable tool holder 200 is also prone to shifting in the vertical direction.

[0058] Figure 7 Schematic diagram of the cross-sectional structure of the flexible variable diameter forming tool provided in the embodiment of the present application Figure 1 ; Figure 8 Schematic diagram of the cross-sectional structure of the flexible variable diameter forming tool provided in the embodiment of the present application Figure 2 .

[0059] See Figure 7 、 Figure 8 As shown, as a possible implementation of the second positioning member, the second positioning member includes a pressure block 500 located above the movable tool holder 200, a third positioning portion 501 is provided on the pressure block 500, and a plurality of fourth positioning portions 202 are provided on the movable tool holder 200. According to the relative position of the movable tool holder 200 and the tool holder 100, the fourth positioning portion 202 engaged with the third positioning portion 501 is changed.

[0060] Specifically, the third positioning portion 501 can be set as a protrusion, and the fourth positioning portion 202 can be set as a groove. When the movable tool holder 200 needs to be fixed, the protrusion is inserted into the corresponding groove so that the movable tool holder 200 cannot move up and down relative to the pressure block 500. When the movable tool holder 200 needs to be moved, the protrusion is disengaged from the groove.

[0061] Of course, the third positioning portion 501 may be a groove, and the fourth positioning portion 202 may be a bump. The shapes of the bump and the groove may be arbitrarily set as long as they can match each other, for example, the bump may be set as a V-shaped block, an arc block, or a square block.

[0062] The pressing block 500 can be directly fixed to the tool holder 100 by screws or the like, or other components can be provided to limit the position of the pressing block 500 .

[0063] In addition, the second positioning member can also be a positioning rod or positioning plate arranged on the outside of the tool holder 100. In this case, a hole or groove that matches it needs to be opened on the top of the movable tool holder 200, and the second positioning member can slide up and down along the tool holder 100. When the position of the movable tool holder 200 needs to be adjusted, the second positioning member is lifted to disengage it from the movable tool holder 200, that is, the radial limit of the movable tool holder 200 can be released, so that the movable tool holder 200 can move radially along the tool holder 100. After the movable tool holder 200 is adjusted to the specified position, the second positioning member is pressed down to engage the positioning rod or positioning plate with the hole or groove, and then the second positioning member is fixed with screws or the like to achieve the limitation of the radial position of the movable tool holder 200.

[0064] Figure 9 Schematic diagram of the three-dimensional structure of the pressing block 500 of the flexible variable diameter forming tool provided in an embodiment of the present application.

[0065] Based on the above examples, see Figure 7-Figure 9 As shown, the pressing block 500 is rotatably connected to the mounting cavity 101 , and the tool holder 100 is provided with a second side hole 600 communicating with the mounting cavity 101 .

[0066] The second side hole 600 includes a first limiting portion 601 extending along the axial direction of the tool holder 100, and a second limiting portion 602 and a third limiting portion 603 which coincide with the rotation trajectory of the pressure block 500. The second limiting portion 602 and the third limiting portion 603 are arranged in an upper and lower relationship, that is, the first limiting portion 601 extends in the vertical direction, while the second limiting portion 602 and the third limiting portion 603 are arc-shaped and extend in the horizontal direction. In addition, the second limiting portion 602 and the third limiting portion 603 are both connected to the first limiting portion 601, that is, the second side hole 600 can be set to a U-shaped structure.

[0067] Among them, a positioning block 502 is provided on the side of the pressure block 500, which is slidably connected to the second side hole 600. The positioning block 502 can be detachably connected or fixedly connected to the pressure block 500, and the groove is also set to an arc shape that coincides with the rotation trajectory of the pressure block 500. Of course, it is best for the limit block to pass through the second side hole 600 and extend to the outside of the tool holder 100.

[0068] When it is necessary to adjust the position of the movable knife holder 200, pulling the positioning block 502 can drive the pressure block 500 to rotate, so that the pressure block 500 rotates to the first limit portion 601, and then the positioning block 502 is provided upward, and the positioning block 502 is rotated so that the positioning block 502 enters the second limit portion 602. At this time, restricted by the positioning block 502, the pressure block 500 moves upward for a distance, so that the protrusion is disengaged from the groove, so that the pressure block 500 no longer restricts the radial position of the movable knife holder 200. After the movable knife holder 200 is moved to the specified position, the positioning block 502 is held and rotated in the opposite direction, so that the positioning block 502 enters the first limit portion 601, and then the positioning block 502 is pressed down so that the positioning block 502 contacts the bottom of the first positioning portion 401, and the positioning block 502 is rotated to enter the third limit portion 603, so that the protrusion is automatically inserted into the groove in this process, thereby locking the radial position of the movable knife holder 200.

[0069] By setting the positioning block 502 and the second side hole 600, the positioning block 502 is used to position the pressing block 500 at different positions when the movable tool holder 200 is moved and fixed, respectively, so that the movable tool holder 200 can be effectively positioned and the position of the movable tool holder 200 can be easily adjusted.

[0070] Please continue to see Figure 7 、 Figure 9 As shown, based on the above embodiment, a top cover 700 can be detachably provided on the tool holder 100. The edge of the top cover 700 abuts against the top of the tool holder 100. The top cover 700, the pressure block 500, and the tool holder 100 are all provided with second threaded holes 701 that cooperate with each other. That is, the top of the mounting cavity 101 is provided with an opening, and the top cover 700 seals the mounting cavity 101 to prevent debris from entering the mounting cavity 101. At the same time, the screws that can cooperate with the second threaded holes 701 simultaneously restrict the position of the top cover 700 and the pressure block 500.

[0071] The second threaded hole 701 on the top cover 700 is a through hole, and the second threaded hole 701 on the pressure block 500 is also a through hole, while the second threaded hole 701 on the tool holder 100 can be a blind hole. To reduce the required length of the screw, a dedicated connecting portion can be provided at an appropriate position on the tool holder 100, and the second threaded hole 701 can be provided on the connecting portion.

[0072] Please continue to see Figure 7 As shown, based on the above embodiment, a compression spring 800 may be further provided between the top cover 700 and the pressing block 500 , and the compression spring 800 is utilized to assist the pressing block 500 in moving downward to position the movable knife seat 200 .

[0073] Of course, the number of the compression spring 800 can be one or more, as long as the position of the second threaded hole 701 is avoided.

[0074] In addition, in actual application, the tool holder 100 can be set to any shape, such as round or square, as long as it can form a mounting cavity 101 and accommodate the movable tool holder 200, and provide effective adjustment space for the movable tool holder 200.

[0075] For ease of understanding, the following uses a cylindrical tool holder 100 to illustrate the structure of the tool in a more specific example:

[0076] At this time, the tool holder 100 is cylindrical, and its interior is hollow to form a mounting cavity 101 , and the top of the mounting cavity 101 is open.

[0077] The top cover 700, compression spring 800, pressure block 500 and movable blade holder 200 are arranged in order from top to bottom in the installation cavity 101. A recessed platform can be provided on the side where the movable blade holder 200 extends outside the blade holder 100, and a threaded hole is provided on the recessed platform for fixing the gasket and blade 300.

[0078] There is only one compression spring 800 , which can be fixed on the pressing block 500 , and the compression spring 800 is arranged around the outside of all the second threaded holes 701 so that the compression spring 800 and the screws do not interfere with each other.

[0079] There are six movable tool holders 200 evenly distributed on the tool holder 100 . The first side holes 102 are square holes that match the size of the movable tool holders 200 .

[0080] The top of the movable tool holder 200 is provided with multiple parallel V-grooves, the top and both ends of the V-grooves are open, and the bottom of the pressure block 500 is provided with a V-block that cooperates with the V-groove. The V-groove and the V-block cooperate tightly to achieve radial locking of the movable tool holder 200.

[0081] To better position the movable blade holder 200, the pressing block 500 can be circular and sized to fit within the inner diameter of the accommodating cavity, allowing it to rotate within the accommodating cavity. Six positioning blocks 502 can also be provided, and the positioning blocks 502 are preferably retractably fixed to the pressing block 500. For example, a slot can be provided in the pressing block 500, into which the positioning block 502 can be pushed by squeezing, and a spring can be provided in the slot. When the squeezing force is removed, the positioning block 502 can automatically pop out of the slot, allowing the pressing block 500 to be placed within the installation cavity 101 for assembly.

[0082] At the same time, space is reserved in the installation cavity 101 for the pressure block 500 to move up and down to realize radial locking and unlocking of the movable tool holder 200. The height of the space is at least equal to the straight-line distance between the second limiting portion 602 and the third limiting portion 603 in the second side hole 600. After the positioning block 502 enters the second limiting portion 602, the V-shaped block is lifted and completely separated from the V-shaped groove. After the positioning block 502 enters the third limiting portion 603, the V-shaped block can be fully inserted into the V-shaped groove.

[0083] The movable tool holder 200 has a dovetail groove at its bottom, and a matching positioning track is provided at the bottom of the mounting cavity 101. The dovetail groove engages with the positioning track, and when the movable tool holder 200 is subjected to axial force, the dovetail groove and the positioning track are tightened. The first threaded hole 203 on the positioning track is preferably configured as an inward groove at the bottom of the tool holder 100 to prevent the screw head from protruding outside the tool holder 100 and interfering with the machined surface.

[0084] The specific use of the tool is as follows:

[0085] First, fix the gasket and the blade 300 on the movable knife holder 200 by screws, then slide the assembled movable knife holder 200 into the installation cavity 101 from the first side hole 102 along the length direction of the positioning track, so that the dovetail groove is engaged with the positioning track, and fix the movable knife holder 200 and the tool holder 100 by screws and the first threaded hole 203, put the pressure block 500 connected to the compression spring 800 into the installation cavity 101, rotate the pressure block 500 until the second threaded hole 701 on the pressure block 500 is aligned with the second threaded hole 701 on the tool holder 100, cover the top cover 700, rotate the top cover 700 until the second threaded hole 701 on the top cover 700 is aligned with the second threaded hole 701 on the pressure block 500, fix the top cover 700, the pressure block 500 and the tool holder 100 by screws and the second threaded hole 701 and then use it (such as Figure 7 shown).

[0086] When the tool diameter needs to be changed, the screws between the movable tool holder 200 and the tool holder 100 are loosened, the screws between the top cover 700, the pressure block 500 and the tool holder 100 are loosened, and the positioning block 502 on the side of the pressure block 500 is rotated to drive the pressure block 500 to rotate. After the positioning block 502 enters the first limit portion 601, the positioning block 502 is lifted upward, and the positioning block 502 drives the pressure block 500 to squeeze the compression spring 800 and move upward. The positioning block 502 is then rotated in the opposite direction to make the positioning block 502 enter the second limit portion 602. At this time, the pressure block 500 is separated from the movable tool holder 200, and the movable tool holder 200 is moved outward or inward to the desired tool size (such as Figure 8As shown), rotate the positioning block 502 again to make the positioning block 502 enter the first limiting portion 601, press down and rotate the positioning block 502 to make it enter the third limiting portion 603 and return to its original position, so as to realize the positioning and fixation of the pressing block 500 and the movable tool holder 200, tighten the screws between the movable tool holder 200 and the tool holder 100, and tighten the screws between the top cover 700, the pressing block 500 and the tool holder 100.

[0087] The present application adopts the above-mentioned configuration, which can realize the change of tool processing diameter without disassembling the tool, thereby reducing the cost of purchasing the tool for the enterprise. At the same time, the connection is reliable, and the blade 300 will not move axially or radially during the processing.

[0088] It should be understood that the above embodiments are merely illustrative descriptions for facilitating understanding of the technical solutions of the present application and are not intended to limit the structure of the present application.

[0089] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0090] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A flexible variable diameter forming tool, characterized in that: include: A tool holder (100), wherein the interior of the tool holder (100) is hollow to form a mounting cavity (101); at least one movable knife seat (200), the movable knife seat (200) being installed in the installation cavity (101), and the movable knife seat (200) being slidably connected to the knife holder (100); a blade (300), the blade (300) being mounted on the movable blade seat (200); a first positioning member, the first positioning member being arranged on the tool holder (100) and being used to limit the axial position of the movable tool holder (200) in the installation cavity (101); a second positioning member, the second positioning member moving along the axial direction of the tool holder (100) to limit the radial position of the movable tool holder (200) in the installation cavity (101); The second positioning member includes a pressing block (500) located above the movable knife seat (200), a third positioning portion (501) is provided on the pressing block (500), and a plurality of fourth positioning portions (202) are provided on the movable knife seat (200). The movable knife seat (200) changes the fourth positioning portion (202) engaged with the third positioning portion (501) according to the change in relative position with the knife holder (100); The side of the tool holder (100) is provided with a first side hole (102) connected to the mounting cavity (101); one end of the movable tool holder (200) on which the blade (300) is mounted passes through the first side hole (102) and extends to the outside of the tool holder (100).

2. The flexible variable diameter forming tool according to claim 1, characterized in that: The first positioning member includes a first positioning portion (401) arranged at the bottom of the installation cavity (101), and a second positioning portion (201) cooperating with the first positioning portion (401) is provided on the movable knife seat (200), the first positioning portion (401) and the second positioning portion (201) are slidably connected, and the length directions of the first positioning portion (401) and the second positioning portion (201) are parallel to the moving trajectory of the movable knife seat (200).

3. The flexible variable diameter forming tool according to claim 2, characterized in that: One of the first positioning portion (401) and the second positioning portion (201) is a dovetail groove, and the other is a positioning track that cooperates with the dovetail groove.

4. The flexible variable diameter forming tool according to claim 3, characterized in that: The bottom of the movable knife seat (200) and the bottom of the knife holder (100) are both provided with first threaded holes (203) that cooperate with each other.

5. The flexible variable diameter forming tool according to claim 4, characterized in that: Of the third positioning portion (501) and the fourth positioning portion (202), one is a convex block and the other is a groove for the convex block to be inserted.

6. The flexible variable diameter forming tool according to claim 5, characterized in that: The protrusion is configured as a V-shaped block, and the groove is configured as a V-shaped groove that matches the shape of the protrusion.

7. The flexible variable diameter forming tool according to claim 5, characterized in that: The pressure block (500) is rotatably connected to the mounting cavity (101), the groove is arranged in an arc shape, a second side hole (600) connected to the mounting cavity (101) is provided on the tool holder (100), the second side hole (600) includes a first limiting portion (601) extending along the axial direction of the tool holder (100), and a second limiting portion (602) and a third limiting portion (603) coinciding with the rotation trajectory of the pressure block (500), the second limiting portion (602) and the third limiting portion (603) are arranged in an upper and lower relationship, and are both connected to the first limiting portion (601), and a positioning block (502) slidably connected to the second side hole (600) is provided on the side of the pressure block (500).

8. The flexible variable diameter forming tool according to claim 7, characterized in that: The installation cavity (101) is provided with an opening at the top, and the tool holder (100) is detachably connected to a top cover (700), and second threaded holes (701) that cooperate with each other are provided on the top cover (700), the pressing block (500) and the tool holder (100).

9. The flexible variable diameter forming tool according to claim 8, characterized in that: A compression spring (800) is provided between the top cover (700) and the pressing block (500).

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