Floating adjusting type annular part fixing tool and fixing method thereof

Abstract

The application discloses a floating adjusting type annular part fixing tool and a fixing method thereof, which comprises a supporting mandrel, a first conical supporting block and a second conical supporting block are sleeved on the supporting mandrel, the first conical supporting block and the second conical supporting block each comprise a cylindrical part and a circular truncated cone part, the two circular truncated cone parts are oppositely arranged, a plurality of open grooves are formed in the circumferential direction of the conical surface of the circular truncated cone part, and the circular truncated cone part is divided into a plurality of supporting protrusions which are arranged in a circumferential direction and are spaced apart, the plurality of supporting protrusions and the plurality of open grooves on the two circular truncated cone parts are slidably embedded with each other, the two ends of the inner hole of the annular part are supported and tensioned by the plurality of conical surfaces which are arranged in a circumferential direction and are staggered and are formed by the mutual embedding of the two circular truncated cone parts, and a locking piece is arranged on the supporting mandrel; the floating adjusting mode is adopted, the two ends of the inner hole of the annular part are supported and tensioned, and therefore the stable and reliable assembly and fixation of the annular part are realized, so that the outer circle machining of the annular part is facilitated.

Description

Technical Field

[0001] This invention relates to the field of parts processing technology, specifically to a floating adjustable ring-shaped parts fixing fixture and its fixing method. Background Technology

[0002] In the machining of mechanical parts, we often encounter the machining of the outer diameter of ring and sleeve parts. Due to the structural limitations of the parts, they often cannot be directly clamped and machined. Therefore, it is necessary to make a batch of special tooling or mandrels for subsequent operations. Different structures or specifications of ring and sleeve parts require corresponding process equipment mandrels of different specifications for limiting and fixing. This undoubtedly increases the manufacturing cost of the parts, and at the same time, the production efficiency cannot be improved. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this invention provides a floating adjustable ring-shaped part fixing fixture and its fixing method, which solves the problem of difficulty in limiting and fixing ring and sleeve-type parts of different structures or specifications.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] In a first aspect, a floating adjustable ring-shaped part fixing fixture is provided, which includes a support mandrel. A first conical support block and a second conical support block are fitted on the support mandrel and cooperate with each other to fix the ring-shaped part. The first conical support block and the second conical support block each include a cylindrical part and a frustum part, and the two frustum parts are arranged opposite to each other. A plurality of opening slots are opened in the circumferential direction on the conical surface of the frustum part, and the plurality of opening slots divide the frustum part into a plurality of support protrusions arranged in the circumferential direction at intervals. The plurality of support protrusions and the plurality of opening slots on the two frustum parts slide and fit with each other. The two ends of the inner hole of the ring part are supported and tensioned by the plurality of circumferentially staggered conical surfaces formed by the mutual fitting of the two frustum parts. A locking member is provided on the support mandrel for pushing the second conical support block to move axially.

[0006] Furthermore, the first and second conical support blocks are provided with inner holes that slide against the outer wall of the support mandrel. The inner holes pass through both the cylindrical part and the frustum part, and the axes of the inner holes, the cylindrical part, and the frustum part are all located on the same straight line.

[0007] Furthermore, one end of the support mandrel is provided with an abutment, which abuts against the cylindrical part of the first conical support block. A first positioning groove is provided on the outer wall of the support mandrel, and a second positioning groove is provided on the side wall of the inner hole of the cylindrical part of the first conical support block. The first positioning groove and the second positioning groove are aligned and fixed by a positioning key.

[0008] Furthermore, the other end of the support mandrel is provided with a threaded rod, and the locking component includes a locking sleeve that is slidably sleeved on the support mandrel. The locking sleeve abuts against the cylindrical part of the second conical support block, and a locking nut for abutting and pushing the locking sleeve is fitted on the threaded rod.

[0009] Furthermore, the radial dimension of the threaded rod is smaller than the radial dimension of the supporting mandrel.

[0010] Furthermore, the two sides of the support protrusion slide against the two side walls of the opening groove, the front end of the support protrusion is a rounded end with chamfering, and the bottom surface of the opening groove is an arc surface that matches the rounded end.

[0011] Furthermore, a center hole is provided at the middle of both ends of the support mandrel.

[0012] Secondly, a method for fixing a floating adjustable ring-shaped part fixing fixture is provided, which includes the following steps:

[0013] S1: Install the positioning key in the first positioning groove on the support mandrel, and fit the first tapered support block onto the support mandrel until the cylindrical end face of the first tapered support block abuts against the stepped end face of the abutment, and the second positioning groove engages with the positioning key;

[0014] S2: Insert the ring-shaped part, the second conical support block, the locking sleeve, and the locking nut in sequence;

[0015] S3: Rotate the locking nut and push the second conical support block closer to the first conical support block. Several support protrusions and several opening slots on the two frustums slide and fit together until the two frustums fit together and the several circumferentially staggered conical surfaces support and tension the two ends of the inner hole of the annular part.

[0016] S4: The support spindle is limited by the center holes at both ends of the support spindle being tightened with the center on the machine tool;

[0017] S5: Manually rotate the support mandrel. If the annular part rotates smoothly along its axis, clamp the support mandrel with the clamp and loosen the lock nut to complete the fixing of the annular part; otherwise, remove the support mandrel from the top, loosen the lock nut, adjust the position of the annular part, and return to step S3.

[0018] Furthermore, before performing step S1, the inner and outer surfaces of each assembly component are cleaned with cleaning gasoline or alcohol; and grease is applied to the outer wall of the support mandrel and the inner and outer surfaces of the first and second conical support blocks by applying grease with a silk cloth.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. This solution adjusts the distance between the first and second conical support blocks to allow several support protrusions and several opening slots on the two frustums to slide and engage with each other. It also uses several circumferentially staggered conical surfaces to support and tension the two ends of the inner hole of the annular part, thereby achieving stable and reliable assembly and fixing of the annular part, so as to facilitate the machining of the outer circle of the annular part.

[0021] 2. This solution adopts a floating adjustment method, which can realize the limiting and fixing of ring parts with different structures or specifications. These include ring parts with different radial dimensions of inner holes, ring parts with different axial dimensions, and some ring parts with special cavities whose inner holes are stepped holes. This improves the flexible assembly capability of ring parts processing and reduces the process cost of assembling and fixing ring parts.

[0022] 3. The support mandrel in this solution achieves precise positioning with the external machine tool through the center hole, while the ring part and the support mandrel achieve precise positioning through the cooperation of the first tapered support block and the second tapered support block. This ensures that when batch processing ring parts of the same structure or specification are carried out, the processing dimensions and geometric tolerances of the ring parts can still be highly consistent after multiple assembly and fixation of the ring parts. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a fixture for fixing a floating, adjustable ring-shaped part.

[0024] Figure 2 Exploded view of the fixture for the floating adjustable ring part.

[0025] Figure 3 A sectional view of the fixed fixture for the floating adjustable ring part and the assembly of the ring part.

[0026] Among them, 1. Support spindle, 2. First conical support block, 3. Second conical support block, 4. Cylindrical part, 5. Frustum part, 6. Opening groove, 7. Support protrusion, 8. Conical surface, 9. Abutment joint, 10. First positioning groove, 11. Second positioning groove, 12. Positioning key, 13. Threaded rod, 14. Locking sleeve, 15. Locking nut, 16. Center hole, 17. Ring part. Detailed Implementation

[0027] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0028] like Figures 1 to 3As shown, the floating adjustable ring-shaped part fixing fixture of this solution includes a support mandrel 1. A first conical support block 2 and a second conical support block 3 that cooperate with each other are sleeved on the support mandrel 1. Specifically, the first conical support block 2 and the second conical support block 3 each include a cylindrical part 4 and a frustum part 5, and the two frustum parts 5 are arranged opposite to each other. The first conical support block 2 and the second conical support block 3 are provided with an inner hole that slides and fits against the outer wall of the support mandrel 1. The inner hole passes through both the cylindrical part 4 and the frustum part 5, and the axes of the inner hole, the cylindrical part 4 and the frustum part 5 are all located on the same straight line.

[0029] The cone surface 8 of the frustum 5 has four opening slots 6 in the circumferential direction. The four opening slots 6 are all connected to the inner hole and form a hollow structure. The four opening slots 6 divide the frustum 5 into four circumferentially spaced support protrusions 7. The four support protrusions 7 and the four opening slots 6 on the two frustums 5 slide and fit into each other. The two ends of the inner hole of the annular part 17 are supported and tensioned by the eight circumferentially staggered cone surfaces 8 formed by the interlocking of the two frustums 5. The support spindle 1 is provided with a locking member for pushing the second conical support block 3 to move axially.

[0030] One end of the support spindle 1 is provided with an abutment 9, which abuts against the cylindrical part 4 of the first conical support block 2. A first positioning groove 10 is provided on the outer side wall of the support spindle 1, and a second positioning groove 11 is provided on the side wall of the inner hole of the cylindrical part 4 of the first conical support block 2. The first positioning groove 10 and the second positioning groove 11 are aligned and fixed by a positioning key 12. The other end of the support spindle 1 is provided with a threaded rod 13, the radial dimension of which is smaller than that of the support spindle 1. The locking component includes a locking sleeve 14 that is slidably sleeved on the support spindle 1. The locking sleeve 14 abuts against the cylindrical part 4 of the second conical support block 3. A locking nut 15 is fitted on the threaded rod 13 for abutting and pushing the locking sleeve 14.

[0031] This solution allows for adjustment of the distance between the first conical support block 2 and the second conical support block 3 by tightening the locking nut 15. This enables the four support protrusions 7 and four opening slots 6 on the two frustum portions 5 to slide and engage with each other. Furthermore, the eight circumferentially staggered conical surfaces 8 support and tension both ends of the inner hole of the annular part 17, thereby achieving stable and reliable assembly and fixation of the annular part 17, which facilitates the machining of the outer circle of the annular part 17.

[0032] The two sides of the support protrusion 7 slide against the two side walls of the opening groove 6. This arrangement allows the first conical support block 2 to provide circumferential limiting for the second conical support block 3 after being fitted together. The first conical support block 2 is circumferentially limited by the positioning key 12. Both the first conical support block 2 and the second conical support block 3 are axially limited by the locking nut 15, thus achieving the limiting and fixing of both, as well as the limiting and fixing of the ring part 17. The front end of the support protrusion 7 is a rounded end with chamfering, and the bottom surface of the opening groove 6 is an arc surface that matches the rounded end. This arrangement facilitates the alignment and insertion of the support protrusion 7 and the opening groove 6.

[0033] Preferably, a center hole 16 is provided at the middle of both ends of the support mandrel 1. Specifically, the center hole 16 includes a center insertion hole located on its inner side and a tapered expansion hole located at its end. The support mandrel 1 achieves precise positioning with the external machine tool through the center hole 16, and the annular part 17 achieves precise positioning with the support mandrel 1 through the cooperation of the first tapered support block 2 and the second tapered support block 3. This ensures that when batch processing of annular parts 17 of the same structure or specification is carried out, the processing dimensions and geometric tolerances of the annular parts 17 can still be kept highly consistent after multiple assembly and fixation of the annular parts 17.

[0034] This solution also provides a method for fixing the floating adjustable ring part 17, which includes the following steps:

[0035] S0: Clean the inner and outer surfaces of each assembly component with cleaning gasoline or alcohol; and apply lubricating grease to the outer wall of the support mandrel 1 and the inner and outer surfaces of the first conical support block 2 and the second conical support block 3 by applying grease with a silk cloth.

[0036] S1: Install the positioning key 12 in the first positioning groove 10 on the support spindle 1, and fit the first conical support block 2 onto the support spindle 1 until the end face of the cylindrical part 4 of the first conical support block 2 abuts against the stepped end face of the abutment 9, and the second positioning groove 11 engages with the positioning key 12.

[0037] S2: Insert the annular part 17, the second conical support block 3, the locking sleeve 14 and the locking nut 15 in sequence;

[0038] S3: Rotate the locking nut 15 and push the second conical support block 3 to gradually approach the first conical support block 2. Several support protrusions 7 and several opening slots 6 on the two frustums 5 slide and fit together until the several circumferentially staggered conical surfaces 8 formed by the two frustums 5 fitting together support and tension the two ends of the inner hole of the annular part 17.

[0039] S4: The support spindle 1 is limited by the center holes 16 at both ends of the support spindle 1 being tightly fitted with the center on the machine tool;

[0040] S5: Manually rotate the support mandrel 1. If the annular part 17 rotates smoothly along its axis, clamp the support mandrel 1 with the clamp and tighten the locking nut 15 to complete the fixation of the annular part 17. Otherwise, remove the support mandrel 1 from the top, loosen the locking nut 15, adjust the position of the annular part 17, and return to step S3.

[0041] In summary, this solution adopts a floating adjustment method, which can realize the limiting and fixing of some annular parts 17 with special cavities, such as those with different radial and axial dimensions of inner holes and those with stepped inner holes. This improves the flexible assembly capability of annular parts 17, reduces the process cost of assembling and fixing annular parts 17, and is convenient to assemble, stable and reliable, and has high positioning accuracy, thus expanding the applicable processing range of annular parts 17.

Claims

1. A method for fixing a floating adjustable ring-shaped part fixing fixture, characterized in that, The floating adjustable annular part fixing fixture includes a support mandrel. A first conical support block and a second conical support block are fitted on the support mandrel to fix the annular part. The first and second conical support blocks each include a cylindrical part and a frustum part, and the two frustum parts are arranged opposite to each other. The frustum part has several openings in the circumferential direction on the conical surface, and the openings divide the frustum part into several circumferentially spaced support protrusions. The support protrusions and openings on the two frustum parts slide and fit together. The two ends of the annular part's inner hole are supported and tensioned by several circumferentially staggered conical surfaces formed by the interlocking of the two frustum parts. The support mandrel is provided with a locking element for pushing the second conical support block to move axially. The first and second conical support blocks are provided with inner holes that slide against the outer wall of the support mandrel. The inner holes pass through both the cylindrical part and the frustum part, and the axes of the inner holes, the cylindrical part and the frustum part are all on the same straight line. One end of the support mandrel is provided with an abutment, which abuts against the cylindrical part of the first conical support block. A first positioning groove is provided on the outer side wall of the support mandrel, and a second positioning groove is provided on the side wall of the inner hole of the cylindrical part of the first conical support block. The first positioning groove and the second positioning groove are aligned and fixed by a positioning key. The other end of the support spindle is provided with a threaded rod, and the locking component includes a locking sleeve that is slidably sleeved on the support spindle. The locking sleeve abuts against the cylindrical part of the second conical support block, and a locking nut for abutting and pushing the locking sleeve is fitted on the threaded rod. The fixing method includes the following steps: S1: Install the positioning key in the first positioning groove on the support mandrel, and fit the first tapered support block onto the support mandrel until the cylindrical end face of the first tapered support block abuts against the stepped end face of the abutment, and the second positioning groove engages with the positioning key; S2: Insert the ring-shaped part, the second conical support block, the locking sleeve, and the locking nut in sequence; S3: Rotate the locking nut and push the second conical support block closer to the first conical support block. Several support protrusions and several opening slots on the two frustums slide and fit together until the two frustums fit together and the several circumferentially staggered conical surfaces support and tension the two ends of the inner hole of the annular part. S4: The support spindle is limited by the center holes at both ends of the support spindle being tightened with the center on the machine tool; S5: Manually rotate the support mandrel. If the annular part rotates smoothly along its axis, clamp the support mandrel with the clamp and tighten the lock nut to complete the fixing of the annular part; otherwise, remove the support mandrel from the top, loosen the lock nut, adjust the position of the annular part, and return to step S3.

2. The fixing method of the floating adjustable annular part fixing fixture according to claim 1, characterized in that, Before performing step S1, the inner and outer surfaces of each assembly component are cleaned with cleaning gasoline or alcohol; and grease is applied to the outer wall of the support mandrel and the inner and outer surfaces of the first and second conical support blocks by applying grease with a silk cloth.

3. The fixing method of the floating adjustable annular part fixing fixture according to claim 1, characterized in that, The radial dimension of the threaded rod is smaller than the radial dimension of the supporting mandrel.

4. The fixing method of the floating adjustable annular part fixing fixture according to claim 1, characterized in that, The two sides of the support protrusion slide against the two side walls of the opening groove, the front end of the support protrusion is a rounded end with chamfering, and the bottom surface of the opening groove is an arc surface that matches the rounded end.

5. The fixing method of the floating adjustable annular part fixing fixture according to claim 1, characterized in that, The support mandrel has a center hole at the middle of both ends.

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