CN213730622U - Positioning processing device and processing equipment - Google Patents

Abstract

A positioning processing device and processing equipment relate to the field of machining tools. The positioning and processing device is used for positioning and processing the lower section of the oxygen lance nozzle and comprises a clamping and positioning piece, a clamping sleeve and a fastener, wherein the clamping and positioning piece comprises a chuck connecting shaft and a plurality of tensioning pieces, the clamping sleeve is provided with a through hole in a penetrating manner, and the clamping sleeve is arranged among the tensioning pieces; one end of the fastener is used for passing through the through hole and is in threaded fit with the threaded hole. The positioning processing device can realize the positioning processing of the lower section of the oxygen lance nozzle, greatly reduces the labor intensity and improves the working efficiency.

Description

Positioning processing device and processing equipment

Technical Field

The utility model relates to a machining frock field particularly, relates to a location processingequipment and processing equipment.

Background

The oxygen lance is one of main process equipment in oxygen converter steelmaking, and the performance characteristics of the oxygen lance directly influence smelting effect and blowing time, thereby influencing the quality and yield of steel.

The oxygen lance nozzle is an important component of an oxygen lance and generally comprises an upper section of the oxygen lance nozzle and a lower section of the oxygen lance nozzle, the lower section of the punch-formed oxygen lance nozzle is integrally disc-shaped, the outer surface and the inner surface of the lower section of the punch-formed oxygen lance nozzle which are oppositely arranged are conical surfaces, a plurality of conical pipes which protrude inwards are arranged on the inner surface, and in order to realize the assembly of the upper section of the oxygen lance nozzle and the lower section of the oxygen lance nozzle, the conical pipe surface of the lower section of the oxygen lance nozzle and the inner steps of the conical pipes are required to be processed.

In the prior art, part of processing methods can realize processing of the lower section of the oxygen lance nozzle, but have the problems of high labor intensity, low working efficiency and the like.

SUMMERY OF THE UTILITY MODEL

The utility model provides a location processingequipment and processing equipment, it can realize the location processing to the oxygen lance shower nozzle hypomere, greatly reduced intensity of labour, and improved work efficiency.

The utility model discloses can realize like this:

the utility model provides a location processingequipment is applied to and fixes a position the processing to the oxygen lance shower nozzle hypomere, and location processingequipment is including pressing from both sides tight setting element, clamping sleeve and fastener.

The clamping positioning piece comprises a chuck connecting shaft and a plurality of tensioning pieces, the chuck connecting shaft is used for being connected with a chuck of the lathe spindle, and the chuck connecting shaft is provided with a threaded hole; one end of the tensioning piece is connected with one end of the chuck connecting shaft, the other end of the tensioning piece extends along the axis of the chuck connecting shaft, the tensioning pieces are distributed around the axis at intervals, the threaded hole is located between the tensioning pieces, the threaded hole is arranged along the axis in the opening direction, and the tensioning pieces are used for extending into the inner hole of the taper pipe of the lower segment of the oxygen lance nozzle.

The clamping sleeve is provided with a through hole in a penetrating mode and is used for being arranged among the tensioning pieces.

One end of the fastener is used for passing through the through hole and is in threaded fit with the threaded hole.

The fastener is used for when screw in screw hole, drives the clamping sleeve and removes towards the direction that is close to the chuck connecting axle to extrude a plurality of tensioning pieces, so that a plurality of tensioning pieces outwards open, a plurality of tensioning pieces press from both sides tightly and are located the taper pipe hole of oxygen rifle shower nozzle hypomere, and be used for when the screw hole is unscrewed, the clamping sleeve can break away from between a plurality of tensioning pieces, so that after a plurality of tensioning pieces were close to each other, the taper pipe hole of oxygen rifle shower nozzle hypomere was taken off in a plurality of tensioning piece pine.

In an optional embodiment, one end of the chuck connecting shaft, which is close to the tension piece, is convexly provided with a positioning step part along the direction vertical to the axis so as to position the tension pieces when the tension pieces extend into the inner hole of the taper pipe of the lower section of the oxygen lance nozzle.

In an alternative embodiment, at least part of the outer surface of the plurality of tension pieces is a conical surface, and the diameters of the corresponding outer circles of the tension pieces are gradually increased along the direction from the end, far away from the tension pieces, of the chuck connecting shaft to the end, close to the tension pieces, of the chuck connecting shaft.

In an alternative embodiment, at least a part of the inner surfaces of the plurality of tension pieces are conical surfaces, and the distance between the corresponding outer circle diameters of the tension pieces is gradually reduced along the direction from the end, far away from the tension pieces, of the chuck connecting shaft to the end, close to the tension pieces, of the chuck connecting shaft.

The outer surface of the clamping sleeve is also a conical surface, and the taper of the outer surface of the clamping sleeve is consistent with the taper of at least part of the inner surface of the plurality of tension sheets.

In an alternative embodiment, the inner surface of one end of the plurality of tension pieces close to the chuck connecting shaft is provided with a relief groove.

In an optional embodiment, the positioning and processing device further comprises a spring, the spring is located in the tool withdrawal groove, one end of the spring abuts against one end, close to the tensioning piece, of the chuck connecting shaft, and the other end of the spring abuts against one end, close to the chuck connecting shaft, of the clamping sleeve.

In an alternative embodiment, the chuck connecting shaft is close to one end of the tension sheet, and the part of the end surface between the plurality of tension sheets is a concave surface.

In an alternative embodiment, a spring is used to nest the fasteners, and the outer diameter of the spring is less than the smallest diameter of the inner surface of the plurality of tension plates.

In an alternative embodiment, the fastener is a bolt and the through hole is a bolt stepped hole.

The utility model also provides a processing equipment, it includes foretell location processingequipment.

The utility model provides a beneficial effect of location processingequipment and processing equipment includes:

through pressing from both sides tight setting element, can realize the taper pipe hole cooperation with oxygen lance shower nozzle hypomere, drive the clamp sleeve through the fastener and remove, can order about a plurality of tension pieces and keep away from each other, be the state of opening, can press from both sides tightly like this and fix a position in the taper pipe hole of oxygen lance shower nozzle hypomere, at this moment, location processingequipment and oxygen lance shower nozzle hypomere can be regarded as an organic whole, fix a position to the lathe main shaft together to be convenient for process this oxygen lance shower nozzle hypomere fast. Meanwhile, during disassembly, the lower section of the oxygen lance nozzle can be conveniently disassembled by screwing the fastening piece out of the threaded hole, and the whole assembly and disassembly process is simple and rapid. Compared with a conventional clamping mode, the scheme can quickly realize the positioning processing of the lower section of the oxygen lance nozzle, greatly reduces the labor intensity and improves the working efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a machined lower section of an oxygen lance nozzle provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view of an assembled positioning and machining device provided in an embodiment of the present application;

FIG. 3 is a top view of an assembled positioning and processing device provided in accordance with an embodiment of the present application;

FIG. 4 is an exploded view of an assembled positioning and processing device according to an embodiment of the present disclosure;

FIG. 5 is a cross-sectional view of the clamping and positioning member of the present embodiment;

FIG. 6 is a cross-sectional view of the clamping sleeve of the present embodiment.

Icon: 100-lower section of oxygen lance nozzle; 1-a conical pipe; 11-a taper step; 12-taper pipe inner hole; 200-positioning a processing device; 2-clamping the positioning piece; 21-a chuck connecting shaft; 211-axis; 212-concave surface; 22-positioning step; 23-a tensioning sheet; 24-tensioning the seam; 25-tool withdrawal grooves; 3-clamping sleeve; 4-a through hole; 5-a fastener; 6-a spring; 7-threaded hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to be referred must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Examples

The oxygen lance is one of main process equipment in oxygen converter steelmaking, and the performance characteristics of the oxygen lance directly influence smelting effect and blowing time, thereby influencing the quality and yield of steel. The oxygen lance nozzle is an important component of an oxygen lance and generally comprises an upper section of the oxygen lance nozzle and a lower section of the oxygen lance nozzle, the lower section of the punch-formed oxygen lance nozzle is integrally disc-shaped, the outer surface and the inner surface of the lower section of the punch-formed oxygen lance nozzle which are oppositely arranged are conical surfaces, a plurality of conical pipes which protrude inwards are arranged on the inner surface, and in order to realize the assembly of the upper section of the oxygen lance nozzle and the lower section of the oxygen lance nozzle, the conical pipe surface of the lower section of the oxygen lance nozzle and the inner steps of the conical pipes are required to be processed.

In the prior art, for example, on a lathe, a four-jaw chuck is adopted, a wedge is added to be matched with the lower section of an oxygen lance nozzle, a fixed sleeve on the wedge is used for fixing the outer circle of the lower section of the oxygen lance nozzle, a counterweight is added to correct the dynamic balance (eccentric processing), the conical tube surface of the lower section of the oxygen lance nozzle is ensured to be 90 degrees with a lathe spindle, the reference point of a conical tube is corrected by a dial indicator again, and then the conical tube surface and the conical tube step are processed; after one conical pipe is machined, the fixing sleeve on the inclined iron needs to be loosened, the lower section of the oxygen lance nozzle is rotated to the next conical pipe, the calibration is carried out again, the reference is found, and then the machining can be started.

The processing method can realize the processing of the lower section of the oxygen lance nozzle, but the processing method is complicated, the tool is heavy, the lower section of the oxygen lance nozzle is provided with a plurality of taper pipes, the correction time of a single taper pipe is long, the labor intensity of workers is high, the working efficiency is low, and the method is not beneficial to batch large-scale production.

The embodiment provides a location processingequipment and processing equipment, and the location processingequipment installation is convenient with the dismantlement, is convenient for find the accurate correction, even need not rectify, can directly process after the installation, and then improved work efficiency to reduce workman intensity of labour, can realize batch large-scale production.

Referring to fig. 1 to 6 together, the processing apparatus includes a lathe (not shown) and a positioning and processing device 200. The positioning processing device 200 is applied to positioning and processing the lower section 100 of the oxygen lance nozzle, and meanwhile, the positioning processing device 200 can be installed on a lathe so as to process the lower section 100 of the oxygen lance nozzle on the positioning processing device 200 through the lathe.

Referring to fig. 1, the lower section 100 of the oxygen lance nozzle shown in fig. 1 has six conical pipes 1, each conical pipe 1 has an inner conical pipe hole 12 and a conical pipe step 11 at one end of the inner conical pipe hole 12. The outer contour of the lower oxygen lance nozzle segment 100 is disc-shaped, and the lower oxygen lance nozzle segment 100 has an upper surface (inner surface) and a lower surface (outer surface) at the relative positions in fig. 1, and the conical pipes 1 are distributed on the inner surface of the lower oxygen lance nozzle segment 100. Generally, the lower section 100 of the oxygen lance nozzle needs to be processed on the end surface of the conical pipe 1 and the conical pipe step 11. In the specific implementation, the number of the taper pipes 1 is not limited, and may be, for example, four, five, seven, eight, or the like.

Referring to fig. 2 to 6, the positioning and processing device 200 includes a clamping and positioning member 2, a clamping sleeve 3 and a fastening member 5.

The clamping positioning piece 2 comprises a chuck connecting shaft 21 and a plurality of tensioning pieces 23, the chuck connecting shaft 21 is used for being connected with a chuck of a lathe spindle, and the chuck connecting shaft 21 is provided with a threaded hole 7; one end of tensioning piece 23 is connected with the one end of chuck connecting axle 21, and the other end of tensioning piece 23 extends along the axis 211 of chuck connecting axle 21, and a plurality of tensioning pieces 23 are around axis 211 interval distribution, and screw hole 7 is located between a plurality of tensioning pieces 23, and screw hole 7 set up along axis 211 in the orientation of seting up, and a plurality of tensioning pieces 23 are arranged in stretching into the taper pipe hole 12 of oxygen rifle shower nozzle hypomere 100. It should be noted that, in conjunction with fig. 3, the number of the tension sheets 23 is eight, a tension slit 24 is formed between any two adjacent tension sheets 23, and the existence of the tension slit 24 facilitates the multiple tension sheets 23 to move away from or close to each other to be in an opened state or a closed state as a whole. In addition, the number of the tension sheets 23 may be four, five, six, seven or nine, for example.

The clamping sleeve 3 is provided with a through hole 4 through it, and the clamping sleeve 3 is arranged between a plurality of tension sheets 23. In other words, the clamping shell 3 is intended to be arranged in the interior space formed between the tension disks 23.

One end of the fastener 5 is used for passing through the through hole 4 and is in threaded fit with the threaded hole 7.

The fastener 5 is used for driving the clamping sleeve 3 to move towards the direction close to the chuck connecting shaft 21 when screwing in the threaded hole 7, and extrudes the plurality of tensioning pieces 23, so that the plurality of tensioning pieces 23 are outwards opened, the plurality of tensioning pieces 23 are clamped and positioned in the conical pipe inner hole 12 of the oxygen lance nozzle lower section 100, and when screwing out the threaded hole 7, the clamping sleeve 3 can be separated from the plurality of tensioning pieces 23, so that after the plurality of tensioning pieces 23 are close to each other, the plurality of tensioning pieces 23 loosen the conical pipe inner hole 12 of the oxygen lance nozzle lower section 100.

Through pressing from both sides tight setting element 2, can realize cooperating with the taper pipe hole 12 of oxygen lance shower nozzle hypomere 100, drive clamping sleeve 3 through fastener 5 and remove, can order about a plurality of tension sheets 23 and keep away from each other, be the state of opening, can press from both sides tightly and be positioned in the taper pipe hole 12 of oxygen lance shower nozzle hypomere 100 like this, at this moment, location processingequipment 200 and oxygen lance shower nozzle hypomere 100 can be regarded as an organic whole, fix a position to the lathe main shaft together on, can process this oxygen lance shower nozzle hypomere 100 fast. Meanwhile, during disassembly, the lower section 100 of the oxygen lance nozzle can be conveniently disassembled by screwing the fastening piece 5 out of the threaded hole 7, and the whole assembly and disassembly process is simple and quick. Compared with a conventional clamping mode, the scheme can quickly realize the positioning processing of the lower section 100 of the oxygen lance nozzle, greatly reduce the labor intensity and improve the working efficiency.

In this embodiment, one end of the chuck connecting shaft 21 close to the tension sheet 23 is convexly provided with a positioning step part 22 along the direction perpendicular to the axis 211, and the positioning step part 22 is used for contacting with the outer surface of the oxygen lance nozzle lower section 100 when the plurality of tension sheets 23 extend into the inner bore 12 of the taper pipe of the oxygen lance nozzle lower section 100 so as to position the plurality of tension sheets 23.

It is understood that the outer contour of the positioning step portion 22 is cylindrical, the chuck connecting shaft 21 is also cylindrical, and the diameter of the positioning step portion 22 is larger than the diameter of the chuck connecting shaft 21.

In this embodiment, at least a part of the outer surface of the plurality of tension pieces 23 is a tapered surface, and the outer diameter of the outer circle corresponding to the plurality of tension pieces 23 gradually increases along a direction from one end of the chuck connecting shaft 21 away from the tension pieces 23 to one end of the chuck connecting shaft 21 close to the tension pieces 23.

That is, the outer contour of the plurality of tension sheets 23 is tapered, and in the relative position of fig. 5, the tapered structure formed by the plurality of tension sheets 23 has a shape with a small top and a large bottom, and the height thereof is generally smaller than the length of the taper pipe 1. Moreover, the generatrix of the conical structure is consistent with the generatrix of the conical pipe 1, so that the generatrix is convenient to be attached to the inner hole 12 of the conical pipe 1. Meanwhile, referring to fig. 5, the taper corresponding to the outer contour of the tension sheets 23 is 7.5 °, and in a specific implementation, it may be 6 °, 7 °, 8 °, or 9 °.

In this embodiment, at least a part of the inner surfaces of the plurality of tension pieces 23 are tapered surfaces, and the corresponding diameter distance of the outer circles of the plurality of tension pieces 23 decreases along the direction from the end of the chuck connecting shaft 21 far away from the tension piece 23 to the end of the chuck connecting shaft 21 close to the tension piece 23; the outer surface of the clamping sleeve 3 is also a conical surface, and the taper of the outer surface of the clamping sleeve 3 is consistent with the taper of at least part of the inner surfaces of the plurality of tension sheets 23, namely the taper shrinks towards the end surface far away from the chuck connecting shaft.

That is, in the inner cavity formed between the tension sheets 23, the contour of the inner cavity is tapered in a large-sized and small-sized manner, and the outer contour of the clamping sleeve 3 is also tapered, and the generatrices of the two are consistent, so that the clamping sleeve is convenient to attach. Meanwhile, in the combination of fig. 5, the taper corresponding to the contour of the inner cavity of the plurality of tension sheets 23 is 10 °, and similarly, in the combination of fig. 6, the taper corresponding to the outer contour of the clamping sleeve 3 is also 10 °. In specific implementation, it may be 9 °, 9.5 °, 10.5 °, or 11 °, etc.

In the present embodiment, the inner surface of one end of the plurality of tension pieces 23 close to the chuck connecting shaft 21 is provided with a relief groove 25. Generally, the relief 25 corresponds to a diameter greater than the diameter of the upper end of the inner cavity profile. The existence of the undercut 25 is more favorable for the tension plate 23 to deform, and is favorable for the plurality of tension plates 23 to move away from or close to each other.

In this embodiment, the positioning and processing device 200 further includes a spring 6, the spring 6 is located in the tool withdrawal groove 25, one end of the spring 6 abuts against one end of the chuck connecting shaft 21 close to the tensioning piece 23, and the other end of the spring 6 abuts against one end of the clamping sleeve 3 close to the chuck connecting shaft 21.

It is worth mentioning that the presence of the spring 6 facilitates the removal of the fastener 5 and thus of the clamping shoe 3. For example, during the dismantlement, owing to there is spring 6, this fastener 5 can unscrew several rings, and a plurality of tensioning pieces 23 just are the state of drawing close, and oxygen rifle shower nozzle hypomere 100 alright take off, trades another taper pipe 1 back again, through fastener 5 several rings of screws in alright realize the state of opening of a plurality of tensioning pieces 23, whole operation labour saving and time saving.

In this embodiment, the chuck connecting shaft 21 is close to one end of the tension sheet 23, and the end surface of a portion between the tension sheets 23 is a concave surface 212. The presence of this concave surface 212 also facilitates the mounting of the spring 6, facilitating the deformation of the spring 6 itself.

In this embodiment, a spring 6 is used to encase the fastener 5, the outer diameter of the spring 6 being less than the smallest diameter of the inner surfaces of the plurality of tension sheets 23. Referring to fig. 4, during installation, the spring 6 may be first inserted into the tool withdrawal groove 25 through the upper ends of the tension pieces 23, then the clamping sleeve 3 is lowered, and finally the fastening member 5 is inserted.

In this embodiment, the fastening member 5 is a bolt, and the through hole 4 is a bolt stepped hole. The bolt is commercially available, generally, can select and offer screw hole 7, and later according to the specification of screw hole 7 rotatory bolt, also can select the bolt earlier, then offer corresponding screw hole 7 according to the specification of bolt.

The operation of the positioning and processing device 200 provided in the present embodiment can refer to:

positioning and processing device 200 assembly: the spring 6 and the clamping sleeve 3 are sequentially placed in an inner cavity defined by the tensioning pieces 23, the fastener 5 penetrates through the clamping sleeve 3 and the spring 6 and slightly taps into the threaded hole 7, and the fastener 5 is not screwed tightly temporarily;

matching with the lower section 100 of the oxygen lance nozzle: the positioning processing device 200 after assembly is inserted into the inner hole 12 of the taper pipe from the outer surface (bottom) of the lower section 100 of the oxygen lance nozzle so that the outer surface is abutted against the positioning step part 22, the fastener 5 is screwed, the clamping sleeve 3 moves towards the direction (downwards from the position in figure 2) close to the chuck connecting shaft 21 under the drive of the fastener 5, the tensioning pieces 23 are stressed and expanded to be in an open state, the tensioning pieces are tightly attached to the inner hole 12 of the taper pipe 1 without looseness, and the lower section 100 of the oxygen lance nozzle and the positioning processing device 200 can be seen as a whole at the moment;

turning on a lathe for processing: the chuck connecting shaft 21 of the positioning processing device 200 is fixedly connected with the chuck of the lathe spindle, the center line of the lathe spindle is superposed with the axis 211 of the positioning processing device 200, and the end surface of the taper pipe 1 and the taper pipe step 11 can be directly processed by a cutter without correcting and finding a reference point; after the conical pipe 1 is machined, the fastening piece 5 is loosened, the plurality of tension sheets 23 are in a close state and separated from the conical pipe 1, the lower section 100 of the oxygen lance nozzle can be taken down, the positioning machining device 200 does not need to be taken down at the moment, the lower section 100 of the oxygen lance nozzle is adjusted to the next conical pipe 1, and the fastening piece 5 is screwed down, so that the machining work of the next conical pipe 1 can be started; all the conical pipes 1 can be processed in sequence according to the sequence.

The positioning and processing device 200 provided by the application has at least the following advantages:

the size and the mass of the positioning processing device 200 can be very small, the whole mounting and dismounting process is convenient, complicated procedures of correcting and finding reference points before processing are omitted in the using process, and the lower section 100 of the oxygen lance nozzle can be directly processed. The time is greatly saved, the labor intensity of workers is reduced, and the working efficiency is improved.

To sum up, the utility model provides a location processingequipment through pressing from both sides tight setting element 2, can realize cooperating with the taper pipe hole 12 of oxygen lance shower nozzle hypomere 100, drive the clamp sleeve 3 through fastener 5 and remove, can order about a plurality of tension sheets 23 and keep away from each other, be the state of opening, can press from both sides tightly like this and be located in the taper pipe hole 12 of oxygen lance shower nozzle hypomere 100, at this moment, location processingequipment 200 and oxygen lance shower nozzle hypomere 100 can be regarded as an organic whole, fix a position to the lathe spindle together on, can process this oxygen lance shower nozzle hypomere 100 fast. Meanwhile, during disassembly, the lower section 100 of the oxygen lance nozzle can be conveniently disassembled by screwing the fastening piece 5 out of the threaded hole 7, and the whole assembly and disassembly process is simple and quick. Compared with a conventional clamping mode, the scheme can quickly realize the positioning processing of the lower section 100 of the oxygen lance nozzle, greatly reduce the labor intensity and improve the working efficiency.

The processing equipment including the above-described positioning and processing device 200 has all the functions of the positioning and processing device 200.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A positioning processing device is applied to positioning processing of the lower section of an oxygen lance nozzle and is characterized by comprising a clamping positioning piece, a clamping sleeve and a fastening piece;

the clamping positioning piece comprises a chuck connecting shaft and a plurality of tensioning pieces, the chuck connecting shaft is used for being connected with a chuck of the lathe spindle, and the chuck connecting shaft is provided with a threaded hole; one end of each tensioning piece is connected with one end of the chuck connecting shaft, the other end of each tensioning piece extends along the axis of the chuck connecting shaft, the plurality of tensioning pieces are distributed at intervals around the axis, the threaded holes are located among the plurality of tensioning pieces, the opening direction of the threaded holes is arranged along the axis, and the plurality of tensioning pieces are used for extending into inner holes of the conical pipes at the lower section of the oxygen lance nozzle;

the clamping sleeve is provided with a through hole in a penetrating manner and is used for being arranged among the tensioning pieces;

one end of the fastener is used for penetrating the through hole to be in threaded fit with the threaded hole.

2. The positioning and processing device as claimed in claim 1, wherein a positioning step is provided at one end of the chuck connecting shaft near the tension piece in a direction perpendicular to the axis for positioning the tension pieces when the tension pieces are inserted into the inner bore of the taper pipe of the lower section of the lance nozzle.

3. The positioning and processing device according to claim 1, wherein at least a part of the outer surface of the tension pieces is a tapered surface, and the diameters of the outer circumferences of the tension pieces are gradually increased in a direction from the end of the chuck connecting shaft away from the tension piece to the end of the chuck connecting shaft close to the tension piece.

4. The positioning and processing device according to claim 1, wherein at least a part of the inner surfaces of the tension pieces are tapered surfaces, and the distance between the corresponding outer diameters of the tension pieces is gradually reduced in a direction from one end of the chuck connecting shaft away from the tension piece to one end of the chuck connecting shaft close to the tension piece;

the outer surface of the clamping sleeve is also a conical surface, and the taper of the outer surface of the clamping sleeve is consistent with the taper of at least part of the inner surface of the tension sheets.

5. The positioning and processing device according to any one of claims 1 to 4, wherein an inner surface of one end of the plurality of tension pieces near the chuck connecting shaft is provided with a relief groove.

6. The positioning and processing device as claimed in claim 5, further comprising a spring, wherein the spring is located in the tool withdrawal groove, one end of the spring abuts against one end of the chuck connecting shaft close to the tensioning piece, and the other end of the spring abuts against one end of the clamping sleeve close to the chuck connecting shaft.

7. The positioning and processing device according to claim 6, wherein the chuck connecting shaft is located near one end of the tension pieces, and the end surface of the chuck connecting shaft between the tension pieces is concave.

8. The positioning and processing device of claim 6, wherein the spring is used for sleeving the fastener, and the outer diameter of the spring is smaller than the minimum diameter of the inner surface of the plurality of tension sheets.

9. The positioning and machining device according to any one of claims 1 to 4, wherein the fastener is a bolt, and the through hole is a bolt stepped hole.

10. A machining apparatus comprising the positioning and machining device of any one of claims 1 to 9.

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