Auxiliary tool for correcting opening seam of shaft sleeve and working method

Abstract

The invention discloses an auxiliary tool for correcting a shaft sleeve opening seam and a working method and belongs to the technical field of shaft sleeve machining. The device is characterized in that a shaft sleeve is sleeved on a mandrel, and the mandrel is placed on a first bracket table and a second bracket table; the first pressure mechanism moves downwards, the pair of pressing rods drive the Haver structure to be folded, and the outer diameter of the shaft sleeve is restrained; the first pressure mechanism continues to move downwards, and the shaping pressure head completes correction of the opening seam of the shaft sleeve; the pushing air cylinder drives the stripping sleeve to move, and the shaft sleeve is pushed to the mandrel rounding section from the mandrel shaping section; the radial translation mechanism moves the mandrel to the position below the second pressure mechanism; the second pressure mechanism moves downwards, and the plane pressure head adjusts the overall roundness of the shaft sleeve; and the air cylinder is pulled to contract, so that the shaft sleeve moves to the mandrel shaping section from the mandrel rounding section. The problem that the opening seam is large after the shaft sleeve is shaped is solved, the opening seam of the shaft sleeve is directly corrected through the auxiliary tool, a plastic layer can be protected, and the labor cost can be greatly reduced.

Description

Technical Field

[0001] The invention relates to an auxiliary tooling and a working method for correcting an opening seam of a shaft sleeve, belonging to the technical field of shaft sleeve processing. Background Art

[0002] In order to meet the needs of the market, some sleeves have the characteristics of small diameter and large wall thickness. This type of sleeve often has the problem of large opening gap after shaping. When the opening gap is too large, the outer diameter of the sleeve in the free state will be much larger than the original outer diameter value, which will make the sleeve unable to be pressed, and a large number of sleeves will be nested during the circulation process. When the sleeves are nested with each other, the plastic layer of the inner diameter of the sleeve will be scratched, causing the product to be scrapped.

[0003] When it comes to the problem of large opening seams in small-diameter and thick-walled sleeves, most manufacturers choose to use a larger interference fit to reshape the opening seams, and manually correct the shape and size of the sleeve opening seams. Manual correction of the opening seams will affect the performance of the plastic layer (lubricating film on the sleeve surface), causing irreversible shortening of the service life. At the same time, manual correction is too slow to match the production efficiency of automated equipment, and the labor cost is high. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and provide an auxiliary tooling and working method for correcting the opening seam of a sleeve, which can effectively control the overall shape and opening seam size of the finished sleeve and avoid the scrapping of the sleeve product during pressing and circulation.

[0005] The first object of the present invention is to provide an auxiliary tooling for correcting the opening seam of a sleeve, which is characterized in that it includes: a core shaft, an axial moving mechanism, an outer diameter surface fixing mechanism, a first pressure mechanism, a second pressure mechanism, a radial translation mechanism and an equipment bracket.

[0006] 1. Mandrel The mandrel is connected by a shaping section and a full circle section. The shaping section is cylindrical, its outer diameter matches the inner diameter of the sleeve, and its outer circle surface is provided with a correction plane that matches the shaping pressure head; the full circle section is provided with a large arc surface and a small arc surface, the outer diameter of the large arc surface is equal to the outer diameter of the shaping section, and the outer diameter of the small arc surface is smaller than the outer diameter of the shaping section, and the outer diameter difference between the large and small arc surfaces forms a roundness adjustment space that matches the plane pressure head.

[0007] During the correction process of the sleeve opening seam, the flat surface of the shaping section faces upward and the small arc surface of the full circle section faces upward; when correcting the shape and size of the sleeve opening seam, the sleeve is placed on the shaping section of the core shaft; when adjusting the roundness of the sleeve opening seam, the sleeve is translated to the full circle section of the core shaft.

[0008] 2. Axial movement mechanism The axial movement mechanism includes a push cylinder and a pull cylinder. The push cylinder and the pull cylinder are arranged relatively and respectively installed on the stage, and the core shaft is located between the two cylinders. The pull cylinder is drivingly connected to the full circle section end of the core shaft, and the sleeve is moved back and forth in the shaping section and the full circle section of the core shaft through the telescopic cooperation of the pull cylinder and the push cylinder to cooperate with the shaping pressure head or the plane pressure head.

[0009] Furthermore, the output shaft of the pulling cylinder is provided with a limiting protrusion, and the outer end of the full circle section of the core shaft is provided with a step hole matching the limiting protrusion, and the limiting protrusion of the output shaft of the pulling cylinder is clamped in the step hole to realize the driving connection between the pulling cylinder and the full circle section of the core shaft.

[0010] Furthermore, a stripping sleeve is provided, which is installed on the loading platform through a supporting frame; the output shaft of the pushing cylinder is connected to the stripping sleeve, and the inner diameter of the stripping sleeve is larger than the outer diameter of the core shaft shaping section and smaller than the outer diameter of the sleeve, so as to cooperate with the end face of the sleeve to push the sleeve from the core shaft shaping section to the core shaft full circle section.

[0011] Furthermore, the full circle section of the core shaft has a large arc surface with a guide groove along the axial direction, and a guide plate is installed on the stage, and the top of the guide plate is inserted into the guide groove of the core shaft, and the two are slidably matched.

[0012] When the pulling cylinder pulls the mandrel to move, the mandrel moves axially along the guide plate through the guide groove (moves toward the pulling cylinder). During this process, the guide plate limits the sleeve on the full circle section of the mandrel, driving the sleeve to move from the full circle section of the mandrel to the shaping section of the mandrel.

[0013] 3. Outer diameter surface fixing mechanism The outer diameter surface fixing mechanism comprises a Haver structure, a first bracket platform and a second bracket platform, and the Haver structure comprises a left Haver block and a right Haver block.

[0014] The left and right Haver blocks are respectively provided with inner arc surfaces matching the sleeve, and the middle part of the first bracket is provided with a first arc surface matching the sleeve; the left and right Haver blocks are respectively slidably assembled on the first bracket and symmetrically arranged on both sides of the first arc surface, and the left and right Haver blocks and the first arc surface cooperate to fix the outer diameter surface of the sleeve on the core shaft shaping section.

[0015] The second bracket is provided with a second arc surface matching the sleeve, the first and second arc surfaces are coaxial, and the curvature of the second arc surface is greater than that of the first arc surface, so as to fix the outer diameter surface of the sleeve on the full circular segment of the core shaft.

[0016] Furthermore, the bottom of the left and right Haver blocks are respectively provided with limit sliders, and the first bracket platform is respectively provided with horizontally arranged left and right slide grooves, the left and right slide grooves are symmetrically arranged on both sides of the first arc surface, and the limit sliders of the left and right Haver blocks are slidably assembled in the left and right slide grooves to realize the opening and closing of the left and right Haver blocks.

[0017] Furthermore, an installation cavity is formed between the limit slider and the inner end of the corresponding slide groove, and a spring is arranged in the installation cavity; the spring is compressed by external force, so that the left and right Haver blocks are displaced toward each other, and the Haver structure is contracted to constrain the outer diameter surface of the sleeve; when the external force is cancelled, the left and right Haver blocks are displaced back to back, and the Haver structure is opened to release the constraint on the outer diameter surface of the sleeve.

[0018] Furthermore, the left and right Haver blocks are respectively provided with upper square grooves, which are arranged vertically and penetrate the corresponding Haver blocks. The middle of the left and right slide grooves are respectively provided with lower square grooves, which are arranged perpendicular to the corresponding slide grooves. By using external force to make the upper and lower square grooves on the same side correspond to each other and coaxial, the left and right Haver blocks can overcome the spring force and move toward each other, and the Haver structure will be closed; when the external force disappears, the left and right Haver blocks will move back to back, and the upper and lower square grooves on the same side will be staggered, and the Haver structure will be opened.

[0019] Furthermore, guide sliders are provided at the bottom of the left and right Haver blocks, and the guide sliders are respectively slidably matched with the corresponding slide grooves, and the guide sliders and the limit sliders on the same side are arranged at intervals.

[0020] 4. The first pressure mechanism The first pressure mechanism includes a first cylinder and a shaping pressure head. The first cylinder drives the shaping pressure head downward. The shaping pressure head cooperates with the correction plane to shape the sleeve opening seam located in the core shaft shaping section. The shaping pressure head matches the opening seam to be processed by the sleeve, and a matching shaping pressure head is selected according to the shape and size of the opening seam.

[0021] Furthermore, the first pressure mechanism also includes a shaping mounting frame and a first vertical guide rail. The first vertical guide rail is vertically arranged, the shaping mounting frame and the first vertical guide rail are slidingly matched, the first cylinder is drivingly connected to the shaping mounting frame, and the shaping pressure head is installed at the bottom of the shaping mounting frame. The first cylinder and the first vertical guide rail realize the up and down linear movement of the shaping pressure head.

[0022] Furthermore, the first pressure mechanism also includes a pair of pressure rods, which are symmetrically installed on both sides of the shaping mounting frame and rise and fall with the shaping pressure head. They are used to insert into the two upper square grooves, so that the left and right Haversian blocks overcome the spring force and move toward each other, and then make the upper and lower square grooves on the same side coaxial, and finally make the Haversian structure collapse and fix the outer diameter surface of the sleeve.

[0023] Furthermore, the bottom end of the pressure rod is a wedge-shaped end. When the wedge-shaped end contacts the upper square groove, its inclined surface can cooperate with the groove wall of the upper square groove, and as the pressure rod continues to move downward, the corresponding Haversian block is driven to move inward.

[0024] During the shaping work: first, the first cylinder drives the shaping mounting frame downward, and the wedge-shaped ends of a pair of pressure rods first contact with the upper square grooves of the left Haver block and the right Haver block; then, the shaping mounting frame continues to descend, and the pressure rod uses the inclined surface of the wedge-shaped end to cooperate with the corresponding upper square groove wall, so that the left and right Haver blocks respectively overcome the spring force and move toward each other along the left and right slide grooves and close until the upper and lower square grooves are coaxial. At this time, the left and right Haver blocks constrain the outer diameter of the sleeve; finally, a pair of pressure rods continue to descend and enter the two lower square grooves of the first bracket respectively until the shaping pressure head contacts both sides of the sleeve opening seam, and cooperates with the correction plane to correct the parts on both sides of the sleeve opening seam that are not completely bent, and complete the shaping of the shape and size of the opening seam.

[0025] After the shaping is completed, the first cylinder drives the shaping mounting frame to reset, a pair of pressure rods leave the upper and lower square grooves, and the left and right Havers blocks reset and open under the action of spring force, releasing the constraint on the outer diameter surface of the sleeve.

[0026] 5. Second pressure mechanism The second pressure mechanism is located on one side of the first pressure mechanism. The second pressure mechanism includes a second cylinder and a flat pressure head. The second cylinder drives the flat pressure head to move up and down in a straight line. When working at this station, the mandrel needs to be moved here and the sleeve needs to be moved to the full circle section of the mandrel. The second cylinder drives the flat pressure head downward, and the roundness adjustment space of the flat pressure head and the mandrel is coordinated to adjust the roundness of the sleeve opening located in the full circle section of the mandrel. The flat pressure head can be replaced according to the shape and size of the opening.

[0027] Furthermore, the second pressure mechanism also includes a full-circle mounting frame and a second vertical guide rail. The second vertical guide rail is vertically mounted, the full-circle mounting frame and the second vertical guide rail are slidably matched, the second cylinder is drive-connected to the full-circle mounting frame, and the flat pressure head is installed at the bottom of the full-circle mounting frame.

[0028] 6. Radial translation mechanism The radial translation mechanism includes a radial translation cylinder and a horizontal guide rail. The horizontal guide rail is installed on a base. A loading platform is slidably mounted on the horizontal guide rail. The output shaft of the radial translation cylinder is connected to the loading platform, driving the loading platform (and other mechanisms such as the core shaft) to translate to the bottom of the first pressure mechanism or the bottom of the second pressure mechanism for different processing.

[0029] Furthermore, limit rods and position sensors are respectively provided at both ends of the horizontal guide rail to limit and monitor the displacement of the loading platform to prevent excessive displacement.

[0030] A second object of the present invention is to provide a method for working an auxiliary tool for correcting the opening seam of a sleeve, which is characterized in that it comprises the following steps: Put the sleeve on the shaping section of the mandrel (depending on the height of the sleeve, 3 to 10 sleeves can be placed at the same time), and then place the mandrel on the first bracket and the second bracket (the shaping section corresponds to the first bracket, and the full circle section corresponds to the second bracket). At this time, the Haval structure is in the open state; The first pressure mechanism moves downward, and a pair of pressure rods drive the Haversian structure to close, thereby constraining the outer diameter of the sleeve; the first pressure mechanism continues to move downward, and the shaping pressure head contacts both sides of the sleeve opening seam, correcting the incompletely bent parts on both sides of the sleeve opening seam, thereby completing the correction of the shape and size of the sleeve opening seam; After the first pressure mechanism is reset, the push cylinder extends to drive the stripping sleeve to move, pushing the sleeve from the mandrel shaping section to the mandrel full circle section. At this time, the sleeve is located on the second bracket, and then the stripping sleeve is reset; The radial translation mechanism moves the mandrel to the bottom of the second pressure mechanism; the second pressure mechanism moves downward, and the flat pressure head contacts the opening of the sleeve, causing the sleeve to deform as a whole, thereby correcting and adjusting the overall curvature (roundness) of the sleeve; After the second pressure mechanism is reset, the radial translation mechanism pushes the sleeve and the mandrel to the bottom of the first pressure mechanism; the cylinder is pulled to contract, so that the sleeve is pushed to the initial position (moving from the full circle section of the mandrel to the shaping section of the mandrel), completing this cycle.

[0031] The present invention solves the problem of a large opening seam after the small diameter and large wall thickness sleeve is reshaped. It adapts to different types of sleeve products by replacing the mandrel, the Havers structure, the first bracket, the second bracket, etc., and the Havers structure is compatible with sleeve products of any size. The present invention is committed to directly correcting the opening seam problem of the sleeve by auxiliary tooling without excessively increasing the interference, which can not only protect the plastic layer on the surface of the sleeve, but also greatly reduce the labor cost expenditure, while ensuring that the sleeve opening seam meets the customer's use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the present invention (part of the equipment bracket is removed); Figure 3 It is a schematic diagram of the assembly between the core shaft, the axial moving mechanism, the outer diameter surface fixing mechanism, and the first pressure mechanism in the present invention; Figure 4 It is a schematic diagram of the assembly between the pressure rod, the Haversian structure and the first bracket in the present invention; Figure 5 It is a structural schematic diagram of the outer diameter surface fixing mechanism in the present invention; Figure 6It is a structural schematic diagram of the first bracket platform and the second bracket platform in the present invention; Figure 7 is a schematic diagram of the Haversian structure in the present invention; Figure 8 It is a schematic diagram of the assembly between the core shaft and the axial moving mechanism in the present invention; Fig. 9 It is a schematic diagram of the assembly between the axial movement mechanism and the radial translation mechanism in the present invention; Fig.10 It is a structural schematic diagram of the radial translation mechanism in the present invention; Fig.11 It is a structural schematic diagram of the core shaft in the present invention; Fig.12 is a cross-sectional view of the core shaft of the present invention; In the figure: mandrel 1, shaping section 1-1, correction plane 1-1-1, full circle section 1-2, large arc surface 1-2-1, small arc surface 1-2-2, step hole 1-3, guide groove 1-4, push cylinder 2, pull cylinder 3, limit convex block 3-1, stripping sleeve 4, support frame 5, The loading platform 6, the guide plate 7, the first bracket platform 8, the first arc surface 8-1, the second bracket platform 9, the second arc surface 9-1, the left Havers block 10, the right Havers block 11, the limit slider 12, the slide groove 13, the spring 14, the upper square groove 15, the lower square groove 16, the guide slider 17, The first cylinder 18, the shaping pressure head 19, the shaping mounting frame 20, the first vertical guide rail 21, the pressure rod 22, the wedge-shaped end 22-1, the second cylinder 23, the plane pressure head 24, the full-circle mounting frame 25, the second vertical guide rail 26, the radial translation cylinder 27, the horizontal guide rail 28, the limit rod 29, the position sensor 30, the sleeve 31, and the base 32. DETAILED DESCRIPTION

[0033] Example 1 An auxiliary tool for correcting an open seam of a shaft sleeve comprises: a core shaft 1, an axial moving mechanism, an outer diameter surface fixing mechanism, a first pressure mechanism, a second pressure mechanism, a radial translation mechanism and an equipment bracket.

[0034] 1. The mandrel 1 is connected by a shaping section 1-1 and a full circle section 1-2. The shaping section is cylindrical, and its outer diameter matches the inner diameter of the sleeve. Its outer circle surface is provided with a correction plane 1-1-1 that matches with the shaping pressure head; the full circle section is provided with a large arc surface 1-2-1 and a small arc surface 1-2-2. The outer diameter of the large arc surface is equal to the outer diameter of the shaping section, and the outer diameter of the small arc surface is smaller than the outer diameter of the shaping section. The outer diameter difference between the large and small arc surfaces forms a roundness adjustment space that matches with the plane pressure head.

[0035] 2. The axial movement mechanism includes a push cylinder 2 and a pull cylinder 3. The pull cylinder is drivingly connected to the full circle segment end of the mandrel, and the sleeve is displaced back and forth in the shaping segment and the full circle segment of the mandrel through the telescopic cooperation of the pull cylinder and the push cylinder.

[0036] In one embodiment of the present invention, the output shaft of the pulling cylinder 3 is provided with a limiting protrusion 3-1, and the outer end of the full circle section of the core shaft is provided with a step hole 1-3 matching the limiting protrusion, and the limiting protrusion of the pulling cylinder output shaft is clamped in the step hole.

[0037] In one embodiment of the present invention, the output shaft of the push cylinder 2 is connected to the stripping sleeve 4, and the stripping sleeve is installed on the stage 6 through the support frame 5. The inner diameter of the stripping sleeve is larger than the outer diameter of the mandrel shaping section and smaller than the outer diameter of the sleeve, so as to cooperate with the end face of the sleeve and push the sleeve from the mandrel shaping section to the mandrel full circle section.

[0038] In one embodiment of the present invention, the full circular section of the core shaft has a large arc surface with guide grooves 1-4 along the axial direction, and a guide plate 7 is installed on the stage. The top of the guide plate is inserted into the guide groove of the core shaft, and the two are slidably matched.

[0039] 3. The outer diameter surface fixing mechanism includes a Haver structure, a first bracket 8 and a second bracket 9 , and the Haver structure includes a left Haver block 10 and a right Haver block 11 .

[0040] The left and right Havers blocks are respectively provided with inner arc surfaces matching the sleeves, and the middle part of the first bracket is provided with a first arc surface 8-1 matching the sleeves; the left and right Havers blocks and the first arc surface cooperate to fix the outer diameter surface of the sleeve on the mandrel shaping section. The second bracket is provided with a second arc surface 9-1 matching the sleeve, the first and second arc surfaces are coaxial, and the curvature of the second arc surface is greater than that of the first arc surface, so as to fix the outer diameter surface of the sleeve on the mandrel full circle section.

[0041] The bottom of the left and right Haver blocks are provided with limit sliders 12, respectively, and the first bracket is provided with horizontally arranged left and right slide grooves 13, respectively. The left and right slide grooves are symmetrically arranged on both sides of the first arc surface, and the limit sliders of the left and right Haver blocks are slidably assembled in the left and right slide grooves. An installation cavity is formed between the limit slider and the inner side end of the corresponding slide groove, and a spring 14 is arranged in the installation cavity.

[0042] The left and right Haver blocks are respectively provided with upper square grooves 15, which are arranged vertically and penetrate the corresponding Haver blocks. The middle of the left and right chute is respectively provided with lower square grooves 16, which are arranged perpendicular to the corresponding chute.

[0043] In one embodiment of the present invention, guide sliders 17 are further provided at the bottom of the left and right Havers blocks, and the guide sliders are respectively slidably matched with the corresponding slide grooves, and the guide sliders and the limit sliders on the same side are arranged at intervals.

[0044] 4. The first pressure mechanism comprises a first cylinder 18, a shaping pressure head 19, a shaping mounting frame 20, a first vertical guide rail 21, and a pair of pressure rods 22. A matching shaping pressure head is selected according to the shape and size of the opening.

[0045] The first vertical guide rail is arranged vertically, the shaping mounting frame is slidably matched with the first vertical guide rail, the first cylinder is drivingly connected to the shaping mounting frame, the shaping pressure head is installed at the bottom of the shaping mounting frame, and a pair of pressure rods are symmetrically installed on both sides of the shaping mounting frame.

[0046] The first cylinder drives the shaping head to descend, and the shaping head cooperates with the correction plane to shape the sleeve opening seam located in the shaping section of the core shaft. As the shaping head rises and falls, a pair of pressure rods are inserted into the two upper square grooves, making the upper and lower square grooves on the same side coaxial, and finally the Haversian structure is closed to fix the outer diameter surface of the sleeve.

[0047] In one embodiment of the present invention, the bottom end of the pressure rod is a wedge-shaped end 22-1. When the wedge-shaped end contacts the upper square groove, its inclined surface can cooperate with the groove wall of the upper square groove, and as the pressure rod continues to move downward, the corresponding Haversian block is driven to move inward.

[0048] 5. The second pressure mechanism includes a second cylinder 23, a flat pressure head 24, a full-circle mounting frame 25, and a second vertical guide rail 26. The flat pressure head can be replaced according to the shape and size of the opening. The second vertical guide rail is installed vertically, the full-circle mounting frame is slidably matched with the second vertical guide rail, the second cylinder is drivingly connected to the full-circle mounting frame, and the flat pressure head is installed at the bottom of the full-circle mounting frame. The second cylinder drives the flat pressure head downward, and the flat pressure head and the roundness adjustment space of the core shaft are matched to adjust the roundness of the sleeve opening seam located in the full-circle section of the core shaft.

[0049] 6. The radial translation mechanism includes a radial translation cylinder 27 and a horizontal guide rail 28. The horizontal guide rail is installed on the base 32, and the worktable is slidably assembled on the horizontal guide rail. The output shaft of the radial translation cylinder is connected to the worktable to drive the core shaft and other mechanisms on the worktable to translate to the bottom of the first pressure mechanism or the bottom of the second pressure mechanism.

[0050] In one embodiment of the present invention, a limit rod 29 and a position sensor 30 are respectively provided at both ends of the horizontal guide rail to limit and monitor the displacement of the loading platform.

[0051] Example 2 A working method of an auxiliary tool for correcting an open seam of a shaft sleeve comprises the following steps: 1) Place the sleeve 31 outside the shaping section 1-1 of the mandrel 1, and then place the mandrel 1 on the first bracket 8 and the second bracket 9, so that the shaping section 1-1 corresponds to the first arc surface 8-1 of the first bracket, the full circle section 1-2 corresponds to the second arc surface 9-1 of the second bracket, and the shaping section 1-1 (the sleeve opening) is located directly below the shaping pressure head 19; The pulling cylinder 3 is extended, and the limiting protrusion 3-1 on the pulling cylinder output shaft is clamped and installed in the step hole 1-3 at the end of the full circle section 1-2 of the core shaft; at this time, the guide groove 1-4 of the core shaft is mounted on the top of the guide plate 7.

[0052] 2) Plastic surgery: First, the first cylinder 18 drives the shaping mounting frame 20 downward, and the wedge-shaped ends 22-1 of a pair of pressure rods 22 first contact the upper square grooves 15 of the left Havers block 10 and the right Havers block 11; Then, the shaping mounting frame 20 continues to move downward, and the pressure rod 22 uses the inclined surface of the wedge-shaped end 22-1 to cooperate with the corresponding groove wall of the upper square groove 15, so that the left and right Havers blocks overcome the spring force and move toward each other along the left and right slide grooves 13 and close together until the upper and lower square grooves are coaxial. At this time, the left and right Havers blocks constrain the outer diameter of the sleeve; Finally, a pair of pressing rods 22 continue to move downward and enter the two lower square grooves 16 of the first bracket 9 respectively, until the shaping pressing head 19 contacts the two sides of the sleeve opening seam and cooperates with the correction plane to correct the incompletely bent parts on both sides of the sleeve opening seam, thus completing the shaping of the shape and size of the opening seam; 3) After the shaping is completed, the first cylinder 18 drives the shaping mounting frame 20 to reset, and the pair of pressure rods 22 leave the upper and lower square grooves. The left and right Havers blocks are displaced backwards and opened under the action of the spring force. The upper and lower square grooves on the same side are dislocated, and the constraint on the outer diameter surface of the sleeve is released; 4) The push cylinder 2 extends, driving the end face of the stripping sleeve 4 to contact the end face of the sleeve on the core shaft shaping section 1-1, and the pulling cylinder 3 does not move, so that the core shaft remains fixed and does not move. The push cylinder 2 continues to extend, and the stripping sleeve 4 pushes the sleeve to move, so that the sleeve moves from the shaping section 1-1 to the full circle section 1-2, and then the stripping cylinder is reset; The shaft sleeve is on the full circle segment 1-2, and its lower semicircular arc surface is clamped and stabilized by the second arc surface 9-1 of the second bracket 9 and the large arc surface 1-2-1 of the full circle segment 1-2, and its upper semicircle (the area where the opening seam is located) is in a suspended state due to the outer diameter difference between the large and small arc surfaces (roundness adjustment space); 5) The radial translation cylinder 27 extends to move the stage 6 to the bottom of the second pressure mechanism, so that the bearing opening seam on the mandrel full circle segment 1-2 is located directly below the plane pressure head 24; the second cylinder 23 drives the plane pressure head 24 to descend, and the plane pressure head cooperates with the roundness adjustment space to complete the adjustment of the roundness of the sleeve opening seam; 6) The second cylinder 23 drives the flat pressure head to rise, and the radial translation cylinder 27 is reset, so that the core shaft 1 is moved to the bottom of the first pressure mechanism; the pulling cylinder 3 contracts, so that the core shaft 1 is axially displaced along the guide plate 7 (towards the pulling cylinder direction) until the end face of the sleeve contacts the outer end of the guide plate; the pulling cylinder 3 continues to contract, and the core shaft 1 continues to move toward the pulling cylinder. Due to the limiting effect of the outer end of the guide plate 7, the sleeve is pushed from the core shaft full circle segment 1-2 to the core shaft shaping segment 1-1, completing this cycle.

Claims

1. An auxiliary tool for correcting the opening seam of a sleeve, characterized in that: include: The mandrel is formed by connecting a shaping section and a full circle section; the shaping section is cylindrical, and its outer circle surface is provided with a correction plane; the full circle section is provided with a large arc surface and a small arc surface, the outer diameter of the large arc surface is equal to the outer diameter of the shaping section, and the outer diameter difference between the large and small arc surfaces forms a roundness adjustment space; The axial movement mechanism includes a push cylinder and a pull cylinder, and the core shaft is located between the two cylinders; the sleeve is moved back and forth in the shaping section and the full circle section of the core shaft through the telescopic cooperation of the pull cylinder and the push cylinder; The outer diameter surface fixing mechanism includes a Haver structure, a first bracket and a second bracket. The Haver structure includes a left Haver block and a right Haver block. The left and right Haver blocks are respectively slidably assembled on the first bracket to fix the outer diameter surface of the shaft sleeve on the mandrel shaping section. The second bracket is used to fix the outer diameter surface of the shaft sleeve on the mandrel full circle section. The first pressure mechanism includes a first cylinder and a shaping pressure head. The first cylinder drives the shaping pressure head downward, and the shaping pressure head cooperates with the correction plane to shape the sleeve opening seam located at the shaping section of the core shaft. The second pressure mechanism comprises a second cylinder and a plane pressure head, and the second cylinder drives the plane pressure head to move linearly up and down; The radial translation mechanism comprises a radial translation cylinder and a horizontal guide rail, wherein the horizontal guide rail is installed on a base, and the radial translation cylinder drives the axial movement mechanism and the outer diameter surface fixing mechanism to translate to below the first pressure mechanism or below the second pressure mechanism.

2. The auxiliary tool for correcting the sleeve opening seam according to claim 1 is characterized in that: The output shaft of the pulling cylinder is provided with a limiting protrusion, and the outer end of the full circle section of the core shaft is provided with a step hole matching the limiting protrusion.

3. The auxiliary tool for correcting the sleeve opening seam according to claim 1 is characterized in that: A stripping sleeve is also provided, the output shaft of the pushing cylinder is connected to the stripping sleeve, the inner diameter of the stripping sleeve is larger than the outer diameter of the core shaft shaping section and smaller than the outer diameter of the sleeve.

4. The auxiliary tool for correcting the sleeve opening seam according to claim 3 is characterized in that: The full circle section of the core shaft has a large arc surface with a guide groove along the axial direction; a guide plate is also provided, and the top of the guide plate is inserted into the guide groove of the core shaft, and the two are slidably matched.

5. The auxiliary tool for correcting the sleeve opening seam according to claim 1 is characterized in that: The bottom of the left and right Haver blocks are respectively provided with limit sliders, and the first bracket is respectively provided with horizontally arranged left and right slide grooves, and the limit sliders of the left and right Haver blocks are slidably assembled in the left and right slide grooves.

6. The auxiliary tool for correcting the sleeve opening seam according to claim 5 is characterized in that: A mounting cavity is formed between the limiting sliding block and the inner end of the corresponding sliding groove, and a spring is arranged in the mounting cavity.

7. The auxiliary tool for correcting the sleeve opening seam according to claim 6 is characterized in that: The left and right Haver blocks are respectively provided with upper square grooves, and the middle of the left and right slide grooves are respectively provided with lower square grooves, and the lower square grooves are arranged perpendicular to the corresponding slide grooves.

8. The auxiliary tool for correcting the sleeve opening seam according to claim 7 is characterized in that: It also includes a pair of pressure rods, which rise and fall with the shaping pressure head and are used to be inserted into the two upper square grooves to make the left and right Havers blocks overcome the spring force and move toward each other.

9. The auxiliary tool for correcting the sleeve opening seam according to claim 8 is characterized in that: The bottom end of the pressure rod is a wedge-shaped end, and the inclined surface of the wedge-shaped end cooperates with the groove wall of the upper square groove. As the pressure rod continues to move downward, the corresponding Haversian block is driven to move inward.

10. A working method of an auxiliary tool for correcting a sleeve opening seam according to any one of claims 1 to 9, characterized in that: The following steps are involved: Put the shaft sleeve on the shaping section of the mandrel, and then place the mandrel on the first bracket and the second bracket. At this time, the Haversian structure is in the open state; The first pressure mechanism moves downward, and a pair of pressure rods drive the Haversian structure to close, thereby constraining the outer diameter of the sleeve; the first pressure mechanism continues to move downward, and the shaping pressure head contacts both sides of the sleeve opening seam, thereby completing the correction of the shape and size of the sleeve opening seam; After the first pressure mechanism is reset, the push cylinder extends to drive the stripping sleeve to move, pushing the sleeve from the mandrel shaping section to the mandrel full circle section. At this time, the sleeve is located on the second bracket, and then the stripping sleeve is reset; The radial translation mechanism moves the mandrel to the bottom of the second pressure mechanism; the second pressure mechanism moves downward, and the flat pressure head contacts the opening of the sleeve to adjust the overall roundness of the sleeve; After the second pressure mechanism is reset, the radial translation mechanism pushes the sleeve and the mandrel to the bottom of the first pressure mechanism; the cylinder is pulled to contract, so that the sleeve moves from the full circle section of the mandrel to the shaping section of the mandrel, completing this cycle.

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