Work fixture for turbine machining

Abstract

The utility model discloses a work fixture for turbine machining, which comprises a shaft body, a first shaft section, a second shaft section and a third shaft section which are sequentially connected along the axial direction, the second shaft section is arranged in a conical shape which is gradually expanded from the first shaft section to the third shaft section, and the third shaft section is provided with a positioning groove which is used for being matched with a convex part at the end part of a turbine workpiece; the locking piece is provided with a first through hole for the first shaft section to penetrate through; the tensioning sleeve is provided with a second through hole allowing the second shaft section to penetrate through, the second through hole is a conical hole matched with the second shaft section, and a connecting part matched with the locking piece is arranged at the end, close to the first shaft section, of the tensioning sleeve; when the locking piece and the connecting part are locked, the locking piece exerts axial acting force on the tensioning sleeve, so that the tensioning sleeve deforms, and the turbine workpiece arranged on the periphery of the tensioning sleeve in a sleeving mode is locked and fixed. When a turbine is machined, clamping can be conveniently and rapidly achieved, the clamping and positioning precision can be guaranteed, and the machining precision and the machining efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of parts processing, in particular to a tooling fixture used for turbine processing. Background Art

[0002] Conventional displacement turbines are the drive units for power generation on oil drilling equipment. The turbines' complex and irregular shapes and structures require high machining precision, thin walls, and a relatively complex manufacturing process. To meet these machining requirements, while maintaining dimensional accuracy, a fixture must be designed that is both convenient and fast to install, while ensuring precise positioning and meeting the assembly process requirements. Utility Model Content

[0003] The main purpose of the utility model is to provide a tooling fixture for turbine machining, which aims to facilitate and quickly clamp the turbine and ensure the clamping positioning accuracy when machining the turbine, so as to improve the machining accuracy and machining efficiency.

[0004] To achieve the above-mentioned purpose, the present invention provides a fixture for turbine machining, comprising:

[0005] The shaft body comprises a first shaft segment, a second shaft segment, and a third shaft segment connected in sequence along the axial direction, wherein the second shaft segment is arranged in a tapered shape gradually expanding from the first shaft segment toward the third shaft segment, and the third shaft segment is provided with a positioning groove for cooperating with a protrusion at the end of the turbine workpiece;

[0006] a locking member, the locking member having a first through hole for the first shaft segment to pass through;

[0007] A tension sleeve, wherein the tension sleeve has a second through hole for the second shaft segment to pass through, the second through hole is a tapered hole adapted to the second shaft segment, and the tension sleeve has an end close to the first shaft segment provided with a connecting portion that cooperates with the locking member;

[0008] When the locking member is locked with the connecting portion, the locking member applies an axial force to the expansion sleeve, so that the expansion sleeve is deformed and the turbine workpiece sleeved on the periphery of the expansion sleeve is locked and fixed.

[0009] In this embodiment, the locking member includes a locking portion and a base, the base is penetrated by the first through hole, the inner peripheral wall of the first through hole is threadedly connected to the outer peripheral wall of the first shaft segment, the locking portion is provided on the outer peripheral wall of the base, and the locking portion is snap-fitted with the connecting portion.

[0010] In this embodiment, the locking portion is a snap-fitting protrusion provided along the outer peripheral wall of the base, the connecting portion is a slot recessed in the inner peripheral wall of the tension sleeve, and the snap-fitting protrusion is snap-fitted into the slot.

[0011] In this embodiment, the clamping groove includes a first groove wall and a second groove wall arranged opposite to each other along the axial direction of the tensioning sleeve, the first groove wall is located on the side of the second groove wall close to the second shaft segment, and the first groove wall is arranged as an inclined surface inclined toward the side away from the second groove wall, and the clamping protrusion includes a first end face opposite to the first groove wall, and a second end face opposite to the second groove wall, and the first end face is arranged as an inclined surface adapted to the first groove wall.

[0012] In this embodiment, the inclination angle of the first groove wall is greater than the inclination angle of the first end surface.

[0013] In this embodiment, a limiting step is provided on the inner peripheral wall of the tension sleeve, and the limiting step is provided adjacent to the connecting portion. When the locking member is locked with the connecting portion, the end face of the locking member close to the second shaft segment abuts against the limiting step.

[0014] In this embodiment, an annular air-avoiding groove is recessed on the outer peripheral wall of the second shaft segment, and the air-avoiding groove is located at the connection between the first shaft segment and the second shaft segment.

[0015] In this embodiment, the tensioning sleeve is provided with a plurality of first strip grooves and a plurality of second strip grooves, the first strip grooves and the second strip grooves are alternately arranged along the outer peripheral wall of the tensioning sleeve, the first strip grooves pass through one end of the tensioning sleeve, and the second strip grooves pass through the other end of the tensioning sleeve.

[0016] In this embodiment, a positioning hole is provided at one end of the first shaft segment away from the second shaft segment for inserting an ejector pin of a machine tool.

[0017] In this embodiment, a limiting groove is provided on the outer periphery of one end of the third shaft segment away from the second shaft segment for being clamped by a clamping claw of a machine tool.

[0018] The utility model discloses a tooling fixture for turbine machining, comprising a shaft, a locking member, and a tensioning sleeve. The tensioning sleeve is provided on the shaft, and the locking member is provided on the tensioning sleeve. When the locking member is locked with a connecting portion, the locking member applies an axial force to the tensioning sleeve, causing the tensioning sleeve to deform and thereby locking and fixing the turbine workpiece disposed around the tensioning sleeve. Specifically, in use, the shaft is first fixedly connected to a machining machine. At this time, the locking member is rotated. The locking member, through its connection with the connecting portion, applies an axial force to the tensioning sleeve. When the locking member applies the axial force to the tensioning sleeve, the conical surface displacement compresses the tensioning sleeve, causing it to deform outward. This creates a strong outward tensioning force on the tensioning sleeve, achieving the purpose of clamping the turbine workpiece, thereby locking and fixing the turbine workpiece disposed around the tensioning sleeve. The utility model is intended to facilitate quick and convenient clamping and ensure clamping and positioning accuracy during turbine machining, thereby improving machining accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 This is a structural schematic diagram of an embodiment of a tooling fixture for turbine machining according to the present invention;

[0021] Figure 2 for Figure 1 A schematic cross-sectional view of an embodiment of the present invention;

[0022] Figure 3 for Figure 2 A partial view of

[0023] Figure 4 for Figure 1 An exploded schematic diagram of an embodiment of the present invention;

[0024] Figure 5 This is a structural diagram of an embodiment of a tension sleeve of the utility model;

[0025] Figure 6 for Figure 5 A schematic cross-sectional view of an embodiment of the present invention;

[0026] Figure 7 This is a structural diagram of an embodiment of a locking member of the utility model;

[0027] Figure 8 This is a structural diagram of an embodiment of the shaft of the present invention.

[0028] Description of Figure Numbers:

[0029]

[0030]

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The utility model provides a tooling fixture for turbine machining.

[0036] Reference Figures 1 to 8 In one embodiment of the present invention, a fixture for turbine machining includes:

[0037] The shaft body 10 comprises a first shaft segment 11, a second shaft segment 12, and a third shaft segment 13 connected in sequence along the axial direction. The second shaft segment 12 is arranged in a tapered shape that gradually expands from the first shaft segment 11 toward the third shaft segment 13. The third shaft segment 13 is provided with a positioning groove 14 for engaging with a protrusion at the end of a turbine workpiece.

[0038] A locking portion 20 having a first through hole 21 for the first shaft segment 11 to pass through;

[0039] A tension sleeve 30 having a second through hole 31 for the second shaft segment 12 to pass through. The second through hole 31 is a tapered hole adapted to fit the second shaft segment 12. An end of the tension sleeve 30 close to the first shaft segment 11 is provided with a connecting portion 32 that cooperates with the locking portion 20.

[0040] When the locking portion 20 is locked with the connecting portion 32 , the locking portion 20 applies an axial force to the expansion sleeve 30 , so that the expansion sleeve 30 is deformed and the turbine workpiece sleeved on the expansion sleeve 30 is locked and fixed.

[0041] The utility model discloses a tooling fixture for turbine processing, comprising a shaft body 10, a locking portion 20 and a tensioning sleeve 30. The tensioning sleeve 30 is provided on the shaft body 10, and the locking portion 20 is provided on the tensioning sleeve 30. When the locking portion 20 is locked with the connecting portion 32, the locking portion 20 applies an axial force to the tensioning sleeve 30, so that the tensioning sleeve 30 is deformed and the turbine workpiece sleeved on the periphery of the tensioning sleeve 30 is locked and fixed. During use, the shaft body 10 is first fixedly connected to the machining center. The locking portion 20 is then rotated, and through its connection with the connecting portion 32, the locking portion 20 applies an axial force to the expansion sleeve 30. Because the second shaft segment 12 is tapered, gradually expanding from the first shaft segment 11 toward the third shaft segment 13, and the second through-hole 31 is a tapered hole that matches the second shaft segment 12, when the locking portion 20 applies an axial force to the expansion sleeve 30, the conical surface displacement compresses the expansion sleeve 30, causing it to deform outward. This creates a strong outward tensioning force on the expansion sleeve 30, clamping the turbine workpiece and thereby locking the turbine workpiece securely within the expansion sleeve 30. Furthermore, a positioning groove 14 is provided on the third shaft segment 13 to facilitate mounting with the end of the turbine workpiece, further securing the turbine and improving stability during machining. After machining is completed, the turbine workpiece releases the force applied to the shaft 10, and then the locking portion 20 is loosened. The locking portion 20 releases the axial force applied to the expansion sleeve 30, and the turbine workpiece can be removed from the expansion sleeve 30. Therefore, the turbine machining method of the present invention can facilitate and quickly clamp while ensuring clamping and positioning accuracy, thereby improving product machining accuracy, product processing efficiency, and equipment utilization.

[0042] Reference Figures 1 to 8In one embodiment of the present utility model, the locking portion 20 includes a locking portion 22 and a base 23. The base 23 is penetrated by the first through hole 21. The inner peripheral wall of the first through hole 21 is threadedly connected to the outer peripheral wall of the first shaft segment 11. The locking portion 22 is provided on the outer peripheral wall of the base 23, and the locking portion 22 is snap-fitted with the connecting portion 32.

[0043] When the locking portion 20 is mounted on the first shaft segment 11 of the expansion sleeve 30, the inner circumferential wall of the first through-hole 21 and the outer circumferential wall of the first shaft segment 11 are threadedly connected, and the locking portion 22 and the connecting portion 32 are engaged. Subsequently, when the locking portion 20 is fixed to the first shaft segment 11, the locking portion 20 is rotated. Since the locking portion 20 and the connecting portion 32 are connected together, the locking portion 20 applies an axial force to the expansion sleeve 30. As can be seen from the above process, in this embodiment, since the connection between the locking portion 20 and the connecting portion 32 only requires the engagement between the locking portion 22 and the connecting portion 32, and no additional structures are required to achieve a tight engagement, the connection between the locking portion 20 and the connecting portion 32 is very convenient, thereby improving the user experience and making it easier to securely mount the locking portion 20 on the expansion sleeve 30.

[0044] Reference Figures 1 to 8 In one embodiment of the present invention, the locking portion 22 is a snap-fit ​​protrusion arranged along the outer wall of the base 23, and the connecting portion 32 is a slot recessed in the inner wall of the tensioning sleeve 30, and the snap-fit ​​protrusion is inserted into the slot.

[0045] In this embodiment, the locking portion 22 is a snap-fit ​​protrusion and the connecting portion 32 is a snap-fit ​​groove. The above structure is easy to process. In addition, the assembly of the snap-fit ​​protrusion and the snap-fit ​​groove can be conveniently installed and is also very stable, thereby improving the installation convenience and stability of the locking portion 20 and the tensioning sleeve 30.

[0046] In this embodiment, the base 23 includes a bottom 231 and a mounting portion 232. The mounting portion 232 is disposed on the bottom 231, and the engaging protrusion is disposed around the outer peripheral wall of the mounting portion 232. When the locking portion 20 is disposed on the tension sleeve 30, the mounting portion 232 is inserted into the first through hole 21, and the end surface of the bottom 231 near the mounting portion 232 abuts the end surface of the tension sleeve 30 near the mounting portion 232. The bottom 231 and / or the mounting portion 232 are polygonal in shape, and the cross-sectional area of ​​the bottom 231 is larger than that of the mounting portion 232.

[0047] Reference Figures 1 to 8In one embodiment of the present utility model, the slot includes a first slot wall 321 and a second slot wall 322 that are oppositely arranged along the axial direction of the tension sleeve. The first slot wall 321 is located on the side of the second slot wall 322 close to the second shaft segment 12. The first slot wall 321 is arranged as an inclined surface inclined toward the side away from the second slot wall 322. The locking protrusion includes a first end face 221 opposite to the first slot wall 321, and a second end face 222 opposite to the second slot wall 322. The first end face 221 is arranged as an inclined surface adapted to the first slot wall 321.

[0048] In this embodiment, through the above-described structure, the engaging protrusion can be conveniently slid into the slot from the opening of the slot, thereby improving the stability of the installation. In addition, the first slot wall 321 and the first end surface 221 are respectively inclined toward the second shaft segment 12, so that the first slot wall 321 can block the first end surface 221, thereby preventing the fastening member 20 from falling off the tension sleeve 30 during the rotation of the locking portion 20. It can be understood that the engaging protrusion can be conveniently slid into the slot from the opening of the slot, thereby improving the stability of the installation. Therefore, the convenience and stability of the installation of the locking portion 20 and the tension sleeve 30 can be further improved.

[0049] Reference Figures 1 to 8 In one embodiment of the present invention, the inclination angle of the first groove wall 321 is greater than the inclination angle of the first end surface 221 .

[0050] In this embodiment, since the first groove wall 321 and the first end face 221 are both set as inclined surfaces, the locking protrusion can be easily slid into the slot from the opening of the slot and installed in the slot. Therefore, in order to further improve the stability of the installation, the inclination angle of the first groove wall 321 is set to be greater than the inclination angle of the first end face 221, so that there is a very small gap between the first groove wall 321 and the first end face 221, so that the first groove wall 321 can block the first end face 221, thereby preventing the tightening member 20 from falling off from the tightening sleeve 30 during the rotation of the locking part 20. It can be understood that in this embodiment, the end face of the first shaft segment 11 close to one end of the locking portion 20 is extended along the first through hole 21 to form a clamping block, and the clamping block is inclined toward one end of the first through hole 21 toward the second shaft segment 12, and the outer peripheral wall of the locking portion 20 is circumferentially recessed to form a limiting groove 24, and the limiting groove 24 is adjacent to the locking portion 22, and the clamping block is clamped in the limiting groove 24.

[0051] Reference Figures 1 to 8In one embodiment of the present invention, a limiting step 33 is provided on the inner circumferential wall of the tensioning sleeve 30, and the limiting step 33 is arranged adjacent to the connecting portion 32. When the locking portion 20 is locked with the connecting portion 32, the end face of the locking portion 20 close to the second shaft segment 11 abuts against the limiting step 33.

[0052] By providing a limiting step 33 that abuts against the end surface of the locking portion 22, the movement of the rotary locking portion 20 on the tensioning sleeve 30 can be further better limited, so that the tightening member 20 only needs to move a certain distance, thereby avoiding excessive movement on the tensioning sleeve 30, causing the tensioning sleeve 30 to generate excessive outward tensioning force, and then applying excessive force to the turbine workpiece, thereby damaging the turbine workpiece.

[0053] Reference Figures 1 to 8 In one embodiment of the present invention, an annular air-avoiding groove 15 is recessed in the outer peripheral wall of the second shaft segment 12 , and the air-avoiding groove 15 is located at the connection between the first shaft segment 11 and the second shaft segment 12 .

[0054] An air avoidance groove 15 is provided at a position adjacent to the outer peripheral wall of the second shaft segment 12 and the first shaft segment 11, so as to facilitate the conical second shaft segment 12 to pass through the second through hole 31, thereby avoiding interference and the like during installation, thereby affecting the installation of the locking portion 20 and the tightening sleeve 30.

[0055] Reference Figures 1 to 8 In one embodiment of the present invention, the tensioning sleeve 30 is provided with a plurality of first strip grooves 34 and a plurality of second strip grooves 35. The first strip grooves 34 and the second strip grooves 35 are alternately arranged along the outer peripheral wall of the tensioning sleeve 30. The first strip grooves 34 pass through one end of the tensioning sleeve 30, and the second strip grooves 33 pass through the other end of the tensioning sleeve 30.

[0056] In this embodiment, the circumferential surface of the expansion sleeve 30 is spaced apart by a plurality of first strip grooves 34 and a plurality of second strip grooves 35. These first strip grooves 34 and second strip grooves 35 can be spaced at equal distances. The expansion sleeve 30 utilizes a tapered connection and external expansion fixing mechanism. The contact surfaces between the second shaft segment 12 and the expansion sleeve 30 are matched tapered surfaces. The locking portion 20 pushes the tapered surface to lock. Driven by the tapered surface, the outer ring of the locking portion 20 continuously expands outward, exerting force on the turbine workpiece to ensure a secure connection between the expansion sleeve 30 and the turbine workpiece.

[0057] Reference Figures 1 to 8 In one embodiment of the present invention, a positioning hole 16 is provided at one end of the first shaft section 11 away from the second shaft section 12 for inserting a thimble of a machine tool.

[0058] On the machining center, first fix the shaft on the machine tool, and then use the movable rotation to cooperate with the positioning hole 16 to install one end of the shaft body 10, which can enhance the rigidity of the shaft and also reduce the vibration during turbine machining.

[0059] Reference Figures 1 to 8 In one embodiment of the present invention, a limiting groove 17 is provided on the outer periphery of one end of the third shaft segment 13 away from the second shaft segment 12 for clamping by a machine tool clamp.

[0060] On the machining center, the shaft body 10 is fixed on the machine tool by clamping it in the limit groove 17 with the machine tool's clamping jaws, which can enhance the rigidity and installation stability of the shaft and also reduce vibration during turbine machining.

[0061] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fixture for turbine machining, characterized in that: include: The shaft body comprises a first shaft section, a second shaft section and a third shaft section which are sequentially connected in the axial direction, wherein the second shaft section is arranged in a conical shape which gradually expands from the first shaft section toward the third shaft section, and the third shaft section is provided with a positioning groove for cooperating with a convex portion at an end of a turbine workpiece; A locking member, wherein the locking member has a first through hole for the first shaft segment to pass through; A tension sleeve, wherein the tension sleeve has a second through hole for the second shaft segment to pass through, the second through hole is a tapered hole adapted to the second shaft segment, and one end of the tension sleeve close to the first shaft segment is provided with a connecting portion that cooperates with the locking member; When the locking member is locked with the connecting portion, the locking member applies an axial force to the tension sleeve, so that the tension sleeve is deformed and the turbine workpiece sleeved on the periphery of the tension sleeve is locked and fixed.

2. The jig for turbine machining according to claim 1, characterized in that: The locking member includes a locking portion and a base, the base is penetrated by the first through hole, the inner circumferential wall of the first through hole is threadedly connected to the outer circumferential wall of the first shaft segment, the locking portion is arranged on the outer circumferential wall of the base, and the locking portion is snap-fitted with the connecting portion.

3. The jig for turbine machining according to claim 2, characterized in that: The locking portion is a clamping protrusion arranged along the outer peripheral wall of the base, and the connecting portion is a clamping groove recessed in the inner peripheral wall of the tension sleeve, and the clamping protrusion is clamped in the clamping groove.

4. The jig for turbine machining according to claim 3, characterized in that: The clamping groove includes a first groove wall and a second groove wall which are arranged opposite to each other along the axial direction of the tension sleeve, the first groove wall is located on a side of the second groove wall close to the second shaft segment, the first groove wall is arranged in an inclined surface inclined toward a side away from the second groove wall, the clamping protrusion includes a first end face opposite to the first groove wall, and a second end face opposite to the second groove wall, the first end face is arranged in an inclined surface adapted to the first groove wall.

5. The jig for turbine machining according to claim 4, characterized in that: The inclination angle of the first groove wall is greater than the inclination angle of the first end surface.

6. The jig for turbine machining according to claim 1, characterized in that: A limiting step is arranged on the inner peripheral wall of the tension sleeve, and the limiting step is arranged adjacent to the connecting portion. When the locking member is locked with the connecting portion, the end surface of the locking member close to the second shaft segment abuts against the limiting step.

7. The jig for turbine machining according to claim 6, characterized in that: An annular air-avoiding groove is recessed on the outer peripheral wall of the second shaft segment, and the air-avoiding groove is located at the connection between the first shaft segment and the second shaft segment.

8. The jig for turbine machining according to claim 1, characterized in that: The tension sleeve is provided with a plurality of first strip grooves and a plurality of second strip grooves, the first strip grooves and the second strip grooves are alternately arranged along the outer peripheral wall of the tension sleeve, the first strip grooves penetrate one end of the tension sleeve, and the second strip grooves penetrate the other end of the tension sleeve.

9. The jig for turbine machining according to claim 1, characterized in that: A positioning hole is provided at one end of the first shaft section away from the second shaft section for inserting an ejector pin of a machine tool.

10. The jig for turbine machining according to claim 1, characterized in that: A limiting groove is provided on the outer periphery of one end of the third shaft segment away from the second shaft segment for clamping by a clamping claw of a machine tool.

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