Rotating frame manufacturing method and rotating frame circle supporting clamp

Abstract

The invention provides a rotating frame manufacturing method and a rotating frame circle supporting clamp, and the rotating frame manufacturing method comprises the following steps: preparing a shell cylinder, and reserving machining allowance on a first end wall and a second end wall of the shell cylinder; preparing a wing plate, and riveting the wing plate and the shell cylinder together; a workpiece is clamped through a rotating frame circle supporting clamp, the first end wall and the second end wall are cut, and after all machining allowances are cut off, a rotating frame is manufactured; the rotating frame circle supporting clamp comprises a supporting column, an inner supporting column, a supporting rod and an expansion screw rod, the surface of the inner supporting column is provided with an expansion screw hole and a plurality of guide grooves, the central axis of the expansion screw hole coincides with the central axis of the inner supporting column, and the outer circumferential face of the inner supporting column, the outer end face of the inner supporting column and the expansion screw hole are communicated through the guide grooves. By the adoption of the technical scheme, the rigidity of the shell cylinder in the primary cutting machining process and the secondary cutting machining process is improved, workpiece deformation is reduced as much as possible, errors are reduced, and the manufacturing precision is improved.

Description

Technical Field

[0001] This invention belongs to the field of process technology, and particularly relates to a method for manufacturing a rotating frame and a rotating frame support fixture. Background Technology

[0002] With the continuous development of machining technology, people have higher and higher requirements for the shape and performance of mechanical parts. In order to keep the thin-shell workpieces in a stable position during the cutting process, special fixtures are used to clamp the thin-shell workpieces.

[0003] For example, patent document CN103692234B discloses a method for machining an intermediate sleeve of a slender, thin-walled flexible shaft. By employing conformal alignment and a secondary clamping method, and using a dial indicator to track and check the runout near the machining area, the method ensures consistency between the two clamping states, solving problems such as poor rigidity of the machining system, cutting deflection, and rotational chatter. This patented technical solution fundamentally addresses the shortcomings of the original machining process, ensuring the machining quality of the intermediate sleeve and achieving the goal of having good initial static imbalance in the thin-walled flexible shaft during the initial manufacturing stage.

[0004] However, for such Figure 1 The rotating frame workpiece shown includes a shell (11) and multiple wing plates (16). The outer circumferential surface of the shell (11) is provided with lugs (12). The inner wall of the shell (11) includes a first end wall (13), a second end wall (14), and a main body wall (15). The main body wall (15) is located between the first end wall (13) and the second end wall (14). One side of each wing plate (16) is riveted to the lugs (12), and the other side of each wing plate (16) extends outward along the radial direction of the shell (11). Due to the rotating frame workpiece… The shape of the part is very complex. The existing manufacturing process is generally to first cut and shape the shell (11) and the wing plate (16) respectively, and then rivet the shell (11) and the wing plate (16) together. However, since the wall thickness of the shell (11) is extremely thin, errors will occur during the cutting and machining process of the shell (11). When the shell (11) and the wing plate (16) are riveted together, the riveting impact force will generate a second impact force on the shell (11), causing the rotating frame workpiece to undergo at least two deformations during the manufacturing process, which affects the manufacturing accuracy. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a method for manufacturing a rotating frame and a rotating frame support fixture.

[0006] The present invention is achieved through the following technical solutions.

[0007] This invention provides a method for manufacturing a rotating frame, comprising the following steps: Step 1: Prepare the shell tube. The outer circumferential surface of the shell tube is provided with lugs. The inner wall surface of the shell tube includes a first end wall, a second end wall and a main body wall. The main body wall is disposed between the first end wall and the second end wall, and both the first end wall and the second end wall are reserved with machining allowance. Step 2: Prepare the wing plate, rivet one side of the wing plate to the lug, and extend the other side of the wing plate outward along the radial direction of the shell, the shell and the wing plate together form a workpiece; Step 3: Provide a lathe and a rotating frame support circular fixture. The rotating frame support circular fixture includes a support column, an inner support column, a support rod, and an expansion screw. The support rod is fixed between the support column and the inner support column. The surface of the inner support column is provided with an expansion screw hole and multiple guide grooves. The central axis of the expansion screw hole coincides with the central axis of the inner support column. The guide grooves connect the outer peripheral surface of the inner support column, the outer end face of the inner support column, and the expansion screw hole. Step 4: First, clamp the lathe spindle and the support column together, then extend the inner support column into the shell, and then connect the expansion screw and the expansion screw hole together through the threaded pair, so that the outer peripheral surface of the inner support column abuts against the second end wall; Step 5: Start the lathe and cut the first end wall to remove the machining allowance. Step Six: Separate the workpiece from the rotating frame support fixture; Step 7: First, clamp the lathe spindle and the support column together, then insert the inner support column into the shell, and then connect the expansion screw and the expansion screw hole together through the threaded pair, so that the outer peripheral surface of the inner support column abuts against the first end wall. Step 8: Start the lathe and cut the second end wall to remove the machining allowance of the second end wall; Step 9: After separating the workpiece from the rotating frame support fixture, a rotating frame is obtained.

[0008] The machining allowance shall not exceed 0.5 mm.

[0009] The number of wing plates is 4, and the 4 wing plates are distributed in a circular array along the outer circumference of the shell.

[0010] In addition, the present invention also provides a rotating frame support circular clamp, including a support column, an inner support column, a support rod and an expansion screw. The support rod is fixed between the support column and the inner support column. The surface of the inner support column is provided with an expansion screw hole and a plurality of guide grooves. The central axis of the expansion screw hole coincides with the central axis of the inner support column. The guide grooves connect the outer peripheral surface of the inner support column, the outer end surface of the inner support column and the expansion screw hole.

[0011] The outer circumferential surface of the support rod is also provided with a tool relief groove, and the guide groove also connects the expansion screw hole and the tool relief groove.

[0012] The projection of the guide groove onto the outer end face of the inner support column is rectangular, and the length direction of the rectangle is consistent with the radial direction of the inner support column.

[0013] The number of guide grooves is multiple, and the multiple guide grooves are distributed in a circular array along the outer circumferential surface of the inner support column.

[0014] The expansion screw is also fixedly connected to the bolt head. The surface of the inner support column is also provided with a support hole, which is connected to the expansion screw hole. When the expansion screw and the expansion screw hole are connected together by a threaded pair, the bolt head is fitted into the support hole.

[0015] The surface of the plug head is provided with a countersinking hole, which is in the shape of a regular hexagonal prism.

[0016] The outer diameter of the support rod is smaller than the outer diameter of the support column and the outer diameter of the inner support column, respectively.

[0017] The beneficial effects of this invention are as follows: By adopting the technical solution of this invention, the manufacturing process sequence of the existing rotating frame is changed. First, the shell is rough-machined to make the shell thicker during the cutting process, which improves the rigidity of the shell and reduces the deformation generated during the initial cutting process. Then, the shell is riveted to the wing plate. Due to the larger shell wall thickness, the impact of riveting impact on the secondary deformation of the shell is reduced. Finally, the workpiece is clamped by a rounding fixture and then further processed, which minimizes the deformation of the workpiece, reduces errors, and improves manufacturing accuracy. Attached Figure Description

[0018] Figure 1 This is an isometric view of the rotating frame of the present invention; Figure 2 This is a front view of the rotating frame of the present invention; Figure 3 This is an exploded view of the rotating frame support circular clamp of the present invention; Figure 4 This is a schematic diagram showing the connection of the support column, inner support column, and support rod of the present invention.

[0019] In the figure: 1-support column, 2-inner support column, 3-support rod, 4-expansion screw, 5-expansion screw hole, 6-guide groove, 7-retracting groove, 8-bolt head, 9-support hole, 10-force countersunk hole, 11-shell, 12-lug, 13-first end wall, 14-second end wall, 15-main body wall, 16-wing plate, 17-avoiding platform. Detailed Implementation

[0020] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0021] like Figures 1 to 4 As shown, the present invention provides a method for manufacturing a rotating frame, comprising the following steps: Step 1: Prepare shell cylinder 11. The outer peripheral surface of shell cylinder 11 is provided with lug 12. The inner wall surface of shell cylinder 11 includes a first end wall 13, a second end wall 14 and a main body wall 15. The main body wall 15 is disposed between the first end wall 13 and the second end wall 14, and both the first end wall 13 and the second end wall 14 are reserved with machining allowance. Step 2: Prepare the wing plate 16, rivet one side of the wing plate 16 to the lug 12, and make the other side of the wing plate 16 extend outward along the radial direction of the shell 11. The shell 11 and the wing plate 16 form a workpiece. Step 3: Provide a lathe and a rotating frame support fixture. The rotating frame support fixture includes a support column 1, an inner support column 2, a support rod 3, and an expansion screw 4. The support rod 3 is fixed between the support column 1 and the inner support column 2. The surface of the inner support column 2 is provided with expansion screw holes 5 and multiple guide grooves 6. The central axis of the expansion screw holes 5 coincides with the central axis of the inner support column 2. The guide grooves 6 connect the outer peripheral surface of the inner support column 2, the outer end face of the inner support column 2, and the expansion screw holes 5. Step 4: First, clamp the lathe spindle and support column 1 together, then insert the inner support column 2 into the housing 11, and then connect the expansion screw 4 and the expansion screw hole 5 together through the threaded pair, so that the outer peripheral surface of the inner support column 2 abuts against the second end wall 14. Step 5: Start the lathe and perform cutting on the first end wall 13 to remove the machining allowance of the first end wall 13; Step Six: Separate the workpiece from the rotating frame support fixture; Step 7: First, clamp the lathe spindle and support column 1 together, then insert the inner support column 2 into the housing 11, and then connect the expansion screw 4 and the expansion screw hole 5 together through the threaded pair, so that the outer peripheral surface of the inner support column 2 abuts against the first end wall 13. Step 8: Start the lathe and perform cutting on the second end wall 14 to remove the machining allowance of the second end wall 14; Step 9: After separating the workpiece from the rotating frame support fixture, the rotating frame is obtained.

[0022] The technical solution of this invention changes the existing manufacturing process sequence of the rotating frame. First, the shell is rough-machined to increase the wall thickness during the cutting process, thereby improving the rigidity of the shell and reducing the deformation generated during the initial cutting process. Then, the shell is riveted to the wing plate. Due to the larger wall thickness of the shell, the impact of the riveting impact on the secondary deformation of the shell is reduced. Finally, the workpiece is clamped by a rounding fixture and then further processed to minimize workpiece deformation, reduce errors, and improve manufacturing accuracy.

[0023] Specifically, the machining allowance does not exceed 0.5mm. There are 4 wing plates 16, which are distributed in a circular array along the outer circumference of the shell 11.

[0024] In addition, the present invention also provides a rotating frame support circular clamp, including a support column 1, an inner support column 2, a support rod 3, and an expansion screw 4. The support rod 3 is fixedly connected between the support column 1 and the inner support column 2. The surface of the inner support column 2 is provided with an expansion screw hole 5 and a plurality of guide grooves 6. The central axis of the expansion screw hole 5 coincides with the central axis of the inner support column 2. The guide grooves 6 connect the outer peripheral surface of the inner support column 2, the outer end surface of the inner support column 2, and the expansion screw hole 5. Using the technical solution of the present invention, when the expansion screw 4 and the expansion screw hole 5 are connected together by a threaded pair, the inner support column 2 expands along its radial direction, thereby tightening the main body wall 15 with the inner support column 2.

[0025] Specifically, the outer circumferential surface of the support rod 3 is also provided with a relief groove 7, and the guide groove 6 connects the expansion screw hole 5 to the relief groove 7. The projection of the guide groove 6 onto the outer end face of the inner support column 2 is rectangular, and the length direction of this rectangle is consistent with the radial direction of the inner support column 2. There are multiple guide grooves 6, and the multiple guide grooves 6 are distributed in a circular array along the outer circumferential surface of the inner support column 2. Preferably, there are four or more guide grooves 6.

[0026] Furthermore, the expansion screw 4 is also fixedly connected to the bolt head 8. The surface of the inner support column 2 is also provided with a support hole 9, which communicates with the expansion screw hole 5. When the expansion screw 4 and the expansion screw hole 5 are connected together via a threaded pair, the bolt head 8 is fitted into the support hole 9. The expansion screw 4 and the bolt head 8 are integrally manufactured. The surface of the bolt head 8 is provided with a countersunk hole 10, which is in the shape of a regular hexagonal prism. Using the technical solution of this invention, when the operator clamps the workpiece, a wrench or other tool can be inserted into the countersunk hole 10 to securely clamp the workpiece to the support fixture.

[0027] Specifically, the bolt head 8 is a truncated cone shape, larger at one end and smaller at the other. The support column 1, inner support column 2, and support rod 3 are integrally manufactured. The outer diameter of the support rod 3 is smaller than the outer diameter of the support column 1 and the outer diameter of the inner support column 2, respectively. A clearance platform 17 is also provided on the outer circumferential surface of the inner support column 2. The position of the clearance platform 17 corresponds to the riveting position between the wing plate 16 and the lug 12. Using the technical solution of this invention, the position of the clearance platform 17 corresponds to the riveting position between the wing plate 16 and the lug 12. This position has undergone the rough machining stage of the shell 11 and the riveting stage between the shell 11 and the wing plate 16, making this position highly susceptible to deformation. When machining the first end wall 13, because the clearance platform 17 is provided on the outer circumferential surface of the inner support column 2, the second end wall 14 position corresponding to the clearance platform 17 has appropriate toughness. The inner support column 2 provides appropriate toughness to the second end wall 14 position. The position between two adjacent clearance platforms 17 on the end wall 14 is continuously supported, thereby correcting the roundness of the second end wall 14, reducing secondary deformation of the workpiece, and improving the machining accuracy of the workpiece. Correspondingly, when machining the second end wall 14, since clearance platforms 17 are provided on the outer circumferential surface of the inner support column 2, the position of the first end wall 13 corresponding to the clearance platform 17 has appropriate toughness. The inner support column 2 continuously supports the position between two adjacent clearance platforms 17 on the first end wall 13, thereby correcting the roundness of the second end wall 14, reducing secondary deformation of the workpiece, and improving the machining accuracy of the workpiece.

Claims

1. A method for manufacturing a rotating frame, characterized in that: Includes the following steps: Step 1: Prepare a shell cylinder (11). The outer circumferential surface of the shell cylinder (11) is provided with lugs (12). The inner wall surface of the shell cylinder (11) includes a first end wall (13), a second end wall (14) and a main body wall (15). The main body wall (15) is disposed between the first end wall (13) and the second end wall (14), and both the first end wall (13) and the second end wall (14) are reserved with machining allowance. Step 2: Prepare the wing plate (16), rivet one side of the wing plate (16) to the lug (12), and make the other side of the wing plate (16) extend outward along the radial direction of the shell (11). The shell (11) and the wing plate (16) form a workpiece. Step 3: Provide a lathe and a rotating frame support circular fixture. The rotating frame support circular fixture includes a support column (1), an inner support column (2), a support rod (3), and an expansion screw (4). The support rod (3) is fixed between the support column (1) and the inner support column (2). The surface of the inner support column (2) is provided with an expansion screw hole (5) and multiple guide grooves (6). The central axis of the expansion screw hole (5) coincides with the central axis of the inner support column (2). The guide grooves (6) make the outer peripheral surface of the inner support column (2), the outer end surface of the inner support column (2), and the expansion screw hole (5) interconnected. Step 4: First, clamp the lathe spindle together with the support column (1), then insert the inner support column (2) into the shell (11), and then connect the expansion screw (4) and the expansion screw hole (5) together through the threaded pair so that the outer peripheral surface of the inner support column (2) abuts against the second end wall (14); Step 5: Start the lathe and perform cutting on the first end wall (13) to remove the machining allowance of the first end wall (13); Step Six: Separate the workpiece from the rotating frame support fixture; Step 7: First, clamp the lathe spindle together with the support column (1), then insert the inner support column (2) into the shell (11), and then connect the expansion screw (4) and the expansion screw hole (5) together through the threaded pair so that the outer peripheral surface of the inner support column (2) abuts against the first end wall (13); Step 8: Start the lathe and cut the second end wall (14) to remove the machining allowance of the second end wall (14); Step 9: After separating the workpiece from the rotating frame support fixture, a rotating frame is obtained.

2. The rotating frame support circular clamp as described in claim 1, characterized in that: The machining allowance shall not exceed 0.5 mm.

3. The rotating frame support circular clamp as described in claim 1, characterized in that: The number of the wing plates (16) is 4, and the 4 wing plates (16) are distributed in a circular array along the outer circumferential surface of the shell (11).

4. A rotating frame-supported circular clamp, characterized in that: It includes a support column (1), an inner support column (2), a support rod (3) and an expansion screw (4). The support rod (3) is fixed between the support column (1) and the inner support column (2). The surface of the inner support column (2) is provided with an expansion screw hole (5) and a plurality of guide grooves (6). The central axis of the expansion screw hole (5) coincides with the central axis of the inner support column (2). The guide grooves (6) make the outer peripheral surface of the inner support column (2), the outer end surface of the inner support column (2) and the expansion screw hole (5) interconnected.

5. The rotating frame support circular clamp as described in claim 4, characterized in that: The outer circumferential surface of the support rod (3) is also provided with a tool relief groove (7), and the guide groove (6) also connects the expansion screw hole (5) and the tool relief groove (7).

6. The rotating frame support circular clamp as described in claim 4, characterized in that: The projection of the guide groove (6) onto the outer end face of the inner support column (2) is rectangular, and the length direction of the rectangle is consistent with the radial direction of the inner support column (2).

7. The rotating frame support circular clamp as described in any one of claims 4 to 6, characterized in that: The number of guide grooves (6) is multiple, and the multiple guide grooves (6) are distributed in a circular array along the outer circumferential surface of the inner support column (2).

8. The rotating frame support circular clamp as described in claim 1, characterized in that: The expansion screw (4) is also fixedly connected to the bolt head (8). The surface of the inner support column (2) is also provided with a support hole (9). The support hole (9) is connected to the expansion screw hole (5). When the expansion screw (4) and the expansion screw hole (5) are connected together by a threaded pair, the bolt head (8) is fitted into the support hole (9).

9. The rotating frame support circular clamp as described in claim 8, characterized in that: The surface of the bolt head (8) is provided with a countersinking hole (10), which is a regular hexagonal prism shape.

10. The rotating frame support circular clamp as described in claim 4, characterized in that: The outer diameter of the support rod (3) is smaller than the outer diameter of the support column (1) and the outer diameter of the inner support column (2).

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