Positioning device for precision numerical control machine tool machining

Abstract

The invention relates to the field of machine tool positioning accessories, in particular to a precision numerical control machine tool machining positioning device which comprises a pressing block used for extruding the side wall of a workpiece. A horizontal hinge shaft at one end of the extension rod is hinged with an obliquely upward concave swing arm, one end of the extension rod is in threaded insertion connection with a shaft rod, and one end of the shaft rod penetrates through the extension rod and is rotationally connected with a wedge-shaped block. According to the precise numerical control machine tool machining positioning device, the extension rod serves as a middle part, one end of the extension rod is provided with an extrusion structure for a workpiece, the other end of the extension rod is provided with a convenient and controllable extension rod return non-return structure, the requirement for laterally fixing and positioning the workpiece is met, meanwhile, the distance between the pressing block and the backer can be rapidly adjusted in a large range, and machining precision is improved. The quick machining and positioning requirements of workpieces of different sizes are met, and the problem that in the prior art, the compatibility of the structural form of a side fixing type positioning clamp to the size change of the workpieces is very low is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of machine tool positioning accessories, in particular to a precision numerical control machine tool machining positioning device. BACKGROUND

[0002] The side fixed positioning clamp of the numerical control machine tool is a special clamp that is pressed and fixed on the side of the workpiece, which is generally matched with a positioning abutment, and only needs to push and press the workpiece on the positioning abutment through the side fixed positioning clamp, which is very suitable for batch processing scenes that need to frequently load and unload workpieces.

[0003] The existing side fixed positioning clamps mainly have two types, which are habitually called "OK clamp" and "toad clamp" in the industry. The working principles of the two types are the same, that is, by pressing the pressing block along the slope on the base, the pressing block moves in the horizontal direction of the workpiece and in the vertical downward direction, and then after the pressing block abuts against the side wall of the workpiece, the workpiece can be pushed and pressed on the positioning abutment and tightly pressed on the machining table, so as to avoid the workpiece from jumping when subjected to the milling force of the cutter.

[0004] The two types of side fixed positioning clamps described above are widely used and mature, but they are based on the same core working principle and also have similar shortcomings, that is, the horizontal movement distance of the pressing block is very small, generally the horizontal movement distance of the pressing block of the "OK clamp" is calculated in millimeters, and the horizontal movement distance of the pressing block of the "toad clamp" generally does not exceed three centimeters. Obviously, when fixing workpieces of different sizes, if the size of the workpiece changes slightly, the existing side fixed positioning clamps need to be disassembled, moved and reinstalled, and the two common types of side fixed positioning clamps have low compatibility for workpiece size changes. Therefore, in order to solve the above problems, a precision numerical control machine tool machining positioning device with a side fixed but large range and convenient adjustment of the horizontal distance of the pressing block is proposed. SUMMARY

[0005] In view of the above or the problem that the compatibility of the structure of the side fixed positioning clamp for workpiece size changes is low in the prior art, the present application is proposed.

[0006] Therefore, the purpose of the present application is to provide a precision numerical control machine tool machining positioning device.

[0007] To solve the above technical problems, the present application provides the following technical scheme: a positioning device for precision numerical control machine tool processing, comprising: a pressing block for extruding the side wall of a workpiece; an extension rod, one end of which is hingedly connected with an upwardly inclined "concave" shaped swing arm, one end of the extension rod is threadedly connected with a shaft, and one end of the shaft penetrates the extension rod and is rotationally connected with a wedge-shaped block, the bottom inclined surface of the wedge-shaped block downwardly abuts against the middle section of the "concave" shaped swing arm; a ring-shaped support coaxially sleeved with the extension rod, and the ring-shaped support is fixedly assembled with a sliding block on one side of the pressing block in a ring-shaped array about the extension rod, the sliding block slides along the axial direction of the extension rod through rollers arranged at equal intervals, and the sliding block is provided with an inclined surface at each roller position, the inclined surface being away from the pressing block and narrowing in distance relative to the outer wall of the extension rod; a spring strip is arranged on both sides of each roller for rolling the roller, and the middle part of the spring strip is hingedly connected with the side wall of the sliding block; a sliding ring is slidingly sleeved with the outer sliding block ring-shaped array group, the inner wall of the sliding ring is provided with a "V" shaped protrusion corresponding to each roller position, the top peak of the protrusion is slidingly connected with the outer wall of the sliding block, and the ends of the spring strips on both sides of the roller are "V" shaped and slidingly abut against the two side inclined surfaces of the protrusion at the corresponding position.

[0008] As a preferred scheme of the present application for the positioning device for precision numerical control machine tool processing, wherein: the middle section of the "concave" shaped swing arm is in the shape of a segment circular tube, and short columns are slidingly inserted between the two ends of the circular tube and the two side edges of the pressing block, and a spring is arranged between the two short columns.

[0009] As a preferred scheme of the present application for the positioning device for precision numerical control machine tool processing, wherein: holes are formed on the outer walls of the two sides of the pressing block on the axis of the short columns, for pushing and separating the pressing block and the swing arm.

[0010] As a preferred scheme of the present application for the positioning device for precision numerical control machine tool processing, wherein: a strip-shaped plane parallel to the axis of the extension rod is formed on the outer wall of the circular tube base material, and the planes are arranged in a ring-shaped array about the extension rod, the number of the planes being the same as that of the sliding blocks, and the rollers are located between the planes and the inclined surfaces.

[0011] As a preferred scheme of the present application for the positioning device for precision numerical control machine tool processing, wherein: the ring-shaped support is provided with an extension part with a "fan-shaped" cross-sectional profile in a ring-shaped array about the axis of the ring-shaped support, the sliding block is inserted between two adjacent extension parts, one end of the sliding block abuts against the ring-shaped support, and a limiting ring is fastened between the end parts of the extension parts away from the ring-shaped support by screws, the limiting ring pressing the other end of the sliding block.

[0012] As a preferred scheme of the present application for the positioning device for precision numerical control machine tool processing, wherein: the bottom of the ring-shaped support is fixedly connected with a triangular bottom plate, and the three corners of the bottom plate are provided with bolts for fixation.

[0013] As a preferred scheme of the application for the precision CNC machine tool machining positioning device, wherein: the two ends of the roller are distributed with elastic strips, a single elastic strip is an obtuse "V" shape, and the "V" shape bending corner of the elastic strip is an "S" shape arc bending, the two side walls of the sliding block are provided with movable grooves matched with the elastic strips, and the elastic strip with the "S" shape arc bending and the movable groove are sleeved as the shaft, and can be deflected in the movable groove.

[0014] As a preferred scheme of the application for the precision CNC machine tool machining positioning device, wherein: the protrusions are provided with a strip-shaped groove on the two side slopes, and the ends of the two elastic strips on the two sides of the roller correspond to the limit positions of the two sliding directions of the sliding ring, and can be elastically contacted in the strip-shaped groove of the corresponding side.

[0015] As a preferred scheme of the application for the precision CNC machine tool machining positioning device, wherein: the adjacent protrusions are provided with an empty slot, and the sliding ring is slid away from the pressing block, so that the end of the elastic strip on the side of the roller is suspended in the empty slot.

[0016] As a preferred scheme of the application for the precision CNC machine tool machining positioning device, wherein: the outer peripheral wall of the sliding ring is recessed in the direction of the axis to form a ring-shaped groove for gripping.

[0017] The precision CNC machine tool machining positioning device of the application has the following beneficial effects: the precision CNC machine tool machining positioning device provided by the application uses an extension rod as an intermediate part, one end of which is designed with a pressing structure for a workpiece, and the other end is designed with a convenient and controllable extension rod back-off and reverse stopping structure, which can quickly and widely adjust the distance between the pressing block and the abutment while satisfying the side fixed position of the workpiece, meet the rapid machining and positioning requirements of workpieces of different sizes, and effectively solve the problem that the compatibility of the side fixed positioning clamp structure form in the prior art to the size change of the workpiece is very low. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a structural schematic view of the precision CNC machine tool machining positioning device.

[0020] Figure 2 It is a structural schematic view of the precision CNC machine tool machining positioning device. Figure 1 It is a structural schematic view of the precision CNC machine tool machining positioning device.

[0021] Figure 3 Assembled structure sectional view between the extension rod and the pressing block.

[0022] Figure 4 Assembled structure schematic view of the sliding ring and the sliding block about the extension rod.

[0023] Figure 5 Assembled structure sectional view between the extension rod and the pressing block. Figure 4 Sectional view of the middle partial structure.

[0024] Figure 6 Assembled structure sectional view between the extension rod and the pressing block. Figure 5 Enlarged view of the structure at A.

[0025] Figure 7 Assembled structure sectional view between the extension rod and the pressing block. Figure 6 Enlarged view of the structure at B.

[0026] Figure 8 Assembled structure sectional view between the extension rod and the pressing block.

[0027] In the figure: 100, the pressing block; 101, the extension rod; 1011, the plane; 102, the swing arm; 1021, the short column; 1022, the spring; 103, the shaft rod; 104, the wedge-shaped block; 105, the sliding block; 1051, the inclined surface; 1052, the movable slot; 106, the roller; 107, the elastic strip; 108, the sliding ring; 1081, the protrusion; 1082, the strip-shaped slot; 1083, the empty slot; 200, the annular support; 201, the extension part; 202, the limiting ring; 203, the bottom plate. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0029] Embodiment, refer to Figures 1-8 The embodiment provides a precision numerical control machine tool machining positioning device, which not only retains the fixed form of side fixing, but also can adjust the horizontal distance of the pressing block 100 in a large range, and realizes the effect that the positioning device can quickly and widely be compatible with workpieces of different sizes.

[0030] The present application comprises a pressing block 100 and an extension rod 101 for pressing the sidewall of a workpiece, an obliquely upward "concave" shaped swing arm 102 is hinged to the horizontal hinge shaft at one end of the extension rod 101, a shaft rod 103 is threadedly inserted into one end of the extension rod 101, and the other end of the shaft rod 103 penetrates through the extension rod 101 and is rotationally connected with a wedge-shaped block 104, the bottom inclined surface 1051 of the wedge-shaped block 104 downwardly abuts against the middle segment of the "concave" shaped swing arm 102; a ring-shaped support 200 coaxially sleeves the extension rod 101, and the ring-shaped support 200 is fixedly assembled with a sliding block 105 in an annular array on one side of the pressing block 100 relative to the extension rod 101, the sliding block 105 slides along the axial direction of the extension rod 101 through equidistantly arranged rollers 106, and the sliding block 105 is provided with an inclined surface 1051 at each roller 106, which is arranged to be narrowed in distance away from the pressing block 100 relative to the outer wall of the extension rod 101; a spring strip 107 for driving the roller 106 to roll is arranged on both sides of each roller 106, and the middle part of the spring strip 107 is hinged to the sidewall of the sliding block 105, the outer part of the annular array group of the sliding block 105 is slidingly sleeved with a sliding ring 108, the inner wall of the sliding ring 108 is provided with a "V" shaped protrusion 1081 corresponding to the position of each roller 106, the top peak of the protrusion 1081 slidingly abuts against the outer wall of the sliding block 105, and the ends of the spring strips 107 on both sides of the roller 106 are "V" shaped and slidingly abut against the two inclined surfaces 1051 on both sides of the protrusion 1081 at the corresponding position.

[0031] Specifically, referring to Figure 8 , the ring-shaped support 200 is provided with an elongated part 201 with a "fan-shaped" cross-sectional profile in an annular array relative to the axis thereof, the sliding block 105 is inserted between two adjacent elongated parts 201, one end of the sliding block 105 abuts against the ring-shaped support 200, and the ends of the elongated parts 201 away from the ring-shaped support 200 are screw-fastened with a limiting ring 202, the limiting ring 202 compresses the other end of the sliding block 105, referring to Figure 1 and Figure 2 , the bottom of the ring-shaped support 200 is fixedly connected with a triangular bottom plate 203, and the three corners of the bottom plate 203 are provided with bolts for fixation.

[0032] The present application mainly provides a function of large-range and rapid adjustment of the horizontal distance of the pressing block 100 contacting the workpiece, which connects two important structures with the extension rod 101 as the intermediate component, one is the structure of the extension rod 101 at one end for pressing the workpiece, and the other is the structure of the extension rod 101 at the other end for preventing the extension rod 101 from retreating, which only allows the extension rod 101 to slide towards the workpiece, so as to send the pressing structure to the vicinity of the sidewall of the workpiece and then operate the pressing structure to press the sidewall of the workpiece.

[0033] First, the working mode of the pressing structure is specifically described, referring to Figure 1 and Figure 2, along the thread in the extension rod 101 to the workpiece direction into the shaft 103, wedge block 104 due to the ground pressure arm 102, and with the shaft 103 rotationally connected, therefore, the wedge block 104 does not rotate with the shaft 103 rotation, but along the shaft 103 axis direction in the workpiece moving down to extrude the swing arm 102, because the swing arm 102 in the initial state is inclined, so the swing arm 102 in the shaft downward deflection between it and the extension rod 101, both can produce horizontal movement, also can produce vertical downward movement, so the block 100 is hinged with the swing arm 102 and in contact with the workpiece side wall, at this time meet the general side of the fixed positioning fixture work requirements, the workpiece is pressed on the abutment and the table; can be referred to as the structure, the swing arm 102 "concave" in the middle section of the round pipe, the two ends of the pipe are respectively with the two sides of the block 100 between the sliding insertion of the short column 1021, and the two short columns 1021 between the contact spring 1022, the two side walls of the block 100 are located on the short column 1021 axis processing hole, used to push the short column 1021 split block 100 and swing arm 102.

[0034] To further illustrate the working mode of the structure of the check, to understand the working principle of the structure, can first refer to the working mode of the one-way bearing, the basic principle is that the roller 106 is brought into the gradually narrowing gap by rolling friction, the gap width changes very small, a small initial friction force can make the roller 106 easily produce strong extrusion force on the wall of the gap, so as to produce enough friction force to make the roller 106 stuck in the gap, the present application is based on the above basic working principle, a new linear roller 106 check structure is designed, wherein the gap is composed of the plane 1011 on the outer wall of the extension rod 101 and the inclined surface 1051 adjacent to the plane 1011 on the sliding block 105, referring to Figure 1 , and Figure 5 and Figure 6 As an example of the perspective view, when the extension rod 101 has a tendency to retreat to the right side loose, the extension rod 101 will also have a tendency to drive the roller 106 further into the narrow gap between the inclined surface 1051 and the plane 1011, but because the sliding ring 108 is in contact with the sleeve sliding block 105, the sliding block 105 is in contact with the roller 106, and the roller 106 is in contact with the extension rod 101, they are in rigid contact, there is no space for the roller 106 to further enter the narrow gap, therefore, the roller 106 is kept stuck between the sliding block 105 and the extension rod 101, the extension rod 101 is prevented from retreating and loosening, thereby ensuring that the extrusion force of the block 100 on the workpiece remains stable; Not only that, with Figure 4For example, the present application provides four groups of the above-mentioned reverse stopping structure composed of sliders 105 and rollers 106 around the extension rod 101, aiming to improve the upper limit of the pressing block 100 on the workpiece extrusion force of the device, of course, according to the actual needs, it can also be adjusted to other number of groups, the structure is that the extension rod 101 is processed with a flat strip 1011 parallel to the axis on the outer wall of the circular tube base material, and the flat strip 1011 is arranged in a ring shape about the extension rod 101, the number of flat strips 1011 is the same as the number of sliders 105, and the rollers 106 are located between the flat strips 1011 and the inclined surfaces 1051.

[0035] The above-mentioned reverse stopping structure for preventing the extension rod 101 from backtracking to cause the pressing block 100 to loosen, relative to the approximate prior art (such as one-way bearing), also provides a reverse stopping control function that the prior art does not have, in short, when fixing a small size workpiece to a large size workpiece, the pressing block 100 and the extension rod 101 need to back off to provide more assembly space, at this time, the above-mentioned reverse stopping function needs to be unlocked, and is quickly unlocked, and after unlocking, it can be quickly re-enabled when needed, which mainly involves the slip ring 108 and the elastic strip 107 on the slider 105; The elastic strip 107 needs to be deflected when one end of the elastic strip 107 is subjected to extrusion, the present application provides a specific example of the structure of the elastic strip 107, which is that the two ends of the roller 106 are distributed with elastic strips 107, a single elastic strip 107 is in an obtuse angle "V" shape, and the "V" shape of the elastic strip 107 is bent in an "S" shape, the two side walls of the slider 105 are provided with a movable groove 1052 matched with the elastic strip 107, the elastic strip 107 is sleeved with the movable groove 1052 as the shaft with limited deflection in the movable groove 1052, the protrusions 1081 are located on the two side inclined surfaces 1051 and are provided with a strip-shaped groove 1082, the ends of the two elastic strips 107 on the two sides of the roller 106 correspond to the limit positions of the two sliding directions of the slip ring 108, and can be elastically contacted in the strip-shaped groove 1082 on the corresponding side, and the adjacent protrusions 1081 are provided with an empty slot 1083, and the sliding of the slip ring 108 away from the pressing block 100 can make the end of the elastic strip 107 on the side of the roller 106 suspended in the empty slot 1083.

[0036] However, before explaining the working principle, first of all, it is necessary to explain that Figure 7, in the condition that the reverse function is enabled, the top end of the elastic strip 107 on the left side of the roller 106 is pressed by the inclined surface 1051 of the protrusion 1081 of the slip ring 108, the pressing force makes the elastic strip 107 deflect, so that the bottom end of the elastic strip 107 pushes the roller 106 to the deep part of the narrow gap between the inclined surface 1051 and the plane 1011, which makes the roller 106 always in good contact with the inclined surface 1051 and the plane 1011 when the reverse function is enabled, which is a prerequisite for zero delay triggering of the reverse function, in this state, the elastic strip 107 on the right side of the roller 106 does not generate force on the roller 106 because the top is in the avoidance groove 1083, and the top end of the elastic strip 107 on the left side of the roller 106 is in contact with the strip-shaped groove 1082 of the left side of the inclined surface 1051 of the protrusion 1081, which can provide a static torque for the slip ring 108 to avoid the contact between the roller 106 and the inclined surface 1051 and the plane 1011 caused by the rollback of the slip ring 108.

[0037] Reference Figure 1 , and in the perspective of Figure 5 , Figure 6 and Figure 7 , the operation principle of the slip ring 108 is described, when the slip ring 108 is pushed to the right, the right side of the protrusion 1081 will press the elastic strip 107 on the right side of the roller 106, and the end of the elastic strip 107 will push the roller 106 to the opening direction of the gap between the inclined surface 1051 and the plane 1011 until the end of the elastic strip 107 slides into the strip-shaped groove 1082 of the right side of the protrusion 1081, so that the state of the roller 106 not being in contact with the inclined surface 1051 and the plane 1011 at the same time is maintained, and the extension rod 101 can be freely pulled and slid forward and backward in this state, in this state, the elastic strip 107 on the left side of the roller 106 does not generate force on the roller 106 because the top is in the avoidance groove 1083, to enable the reverse function again, refer to the previous text to push the slip ring 108 to the left, the outer wall of the slip ring 108 is recessed to the axis direction to form a ring-shaped groove, which is convenient for gripping operation.

[0038] In summary, the precision numerical control machine tool machining positioning device provided by the present application takes the extension rod 101 as an intermediate part, one end of which is designed with a pressing structure for the workpiece, and the other end is designed with a convenient and controllable extension rod 101 rollback reverse structure, which can quickly and widely adjust the distance between the pressing block 100 and the abutment while satisfying the side fixed position of the workpiece, meeting the rapid machining and positioning needs of workpieces of different sizes, and effectively solving the problem of low compatibility of the side fixed positioning clamp structure form to the size change of the workpiece in the prior art.

[0039] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A precision NC machine tool machining positioning device, characterized by, The utility model relates to a kind of extrusion device for workpiece, including Compression block (100) for extruding the side wall of workpiece; Extension rod (101), the horizontal hinged shaft of one end of which is hinged with obliquely upward "concave” letter-shaped swing arm (102), one end of the extension rod (101) is threaded and inserted with shaft rod (103), and one end of the shaft rod (103) penetrates the extension rod (101) and is rotatably connected with wedge block (104), the bottom inclined surface (1051) of the wedge block (104) is downwardly abutted against the "concave” letter-shaped middle segment of extruding swing arm (102); Annular support (200), which coaxially sleeves the extension rod (101), is fixedly assembled with a slide block (105) on one side of the compression block (100) about the extension rod (101) in an annular array, the slide block (105) slides along the axial direction of the extension rod (101) through equally spaced rollers (106), and the slide block (105) is provided with an inclined surface (1051) at each roller (106) that narrows in distance away from the compression block (100) relative to the outer wall of the extension rod (101); Each of the rollers (106) is provided with a spring strip (107) on both sides for pushing it to roll, and the middle part of the spring strip (107) is hinged to the side wall of the slide block (105), the outer slide sleeve of the annular array group of the slide block (105) is provided with a sliding ring (108), the inner wall of the sliding ring (108) is provided with a "V”-shaped protrusion (1081) corresponding to the position of each roller (106), the top of the protrusion (1081) is slidably connected to the outer wall of the slide block (105), and the ends of the spring strips (107) on both sides of the roller (106) are "V”-shaped and slidably abut against the two inclined surfaces (1051) of the protrusion (1081) at the corresponding position.

2. The precision NC machine tool machining positioning device according to claim 1, characterized in that: The "concave” letter-shaped middle segment of the swing arm (102) is in the shape of a segmental pipe, and short columns (1021) are slidably inserted between the two sides of the compression block (100) at both ends of the pipe, and springs (1022) are abutted between the two short columns (1021).

3. The precision CNC machine tool machining positioning device of claim 2, wherein: Holes are machined on the outer walls of the compression block (100) on the axis of the short columns (1021) for pushing the short columns (1021) to disassemble the compression block (100) and the swing arm (102).

4. The precision CNC machine tool machining positioning device of claim 1, wherein: The extension rod (101) is made of a circular tube base material, and a belt-shaped plane (1011) parallel to the axis is machined on the outer wall, the plane (1011) is arranged in an annular array about the extension rod (101), the number of the plane (1011) is the same as the number of the slide block (105), and the roller (106) is located between the plane (1011) and the inclined surface (1051).

5. The precision CNC machine tool machining positioning device of claim 1, wherein: The annular support (200) is provided with an extension part (201) with a "fan-shaped” cross-sectional profile in an annular array about its axis, the slide block (105) is inserted between two adjacent extension parts (201), one end of the slide block (105) abuts against the annular support (200), and limit rings (202) are tightly fastened between the ends of the extension part (201) away from the annular support (200), the other end of the slide block (105) is pressed by the limit ring (202).

6. The precision CNC machine tool machining positioning device of claim 5, wherein: The bottom of the annular support (200) is fixedly connected with a triangular bottom plate (203), and three corners of the bottom plate (203) are provided with bolts for fixation.

7. The precision CNC machine tool machining positioning device of claim 1, wherein: The two ends of the roller (106) are distributed with elastic strips (107), and a single elastic strip (107) is an obtuse angle "V" shape, and the "V" shape bending corner of the elastic strip (107) is an "S" shape arc bending, and the two side walls of the sliding block (105) are provided with movable grooves (1052) matched with the elastic strips (107), and the elastic strip (107) is sleeved with the movable groove (1052) as the shaft of the structure of "S" shape arc bending, and can be deflected in the movable groove (1052).

8. The precision CNC machine tool machining positioning apparatus of claim 1, wherein: The protrusions (1081) are located on the two side slopes (1051) and are provided with strip grooves (1082), and the ends of the two elastic strips (107) on the two sides of the roller (106) correspond to the limit positions of the two sliding directions of the sliding ring (108), and can be elastically abutted in the strip grooves (1082) on the corresponding side.

9. The precision CNC machine tool machining positioning device of claim 8, wherein: The adjacent protrusions (1081) are provided with avoidance grooves (1083), and the sliding of the sliding ring (108) away from the pressing block (100) can make the end of the elastic strip (107) on the side of the roller (106) suspended in the avoidance groove (1083).

10. The precision CNC machine tool machining positioning apparatus of claim 1, wherein: The outer peripheral wall of the sliding ring (108) is recessed in the direction of the axis to form a ring-shaped groove for gripping.

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