CN216066260U - Mechanical device for bearing riveting process - Google Patents

Abstract

The mechanical device of the bearing riveting point process comprises an upper press, an upper bearing positioning tool, a valve body positioning tool, a lower bearing positioning tool and a lower press which are sequentially arranged from top to bottom, wherein the upper press and the lower press are respectively used for assembling an upper bearing and a lower bearing for a valve body, and the upper press is provided with a press with a larger load so as to realize riveting of the upper bearing. The upper bearing positioning tool is used for positioning an upper bearing. The valve body positioning tool is used for positioning the valve body. The lower bearing positioning tool is used for positioning a lower bearing. The utility model can overcome the problems of large area of the riveting point, uneven depth, insufficient depth of the riveting point, insufficient assembly and disassembly force and fracture of the riveting point, thereby improving the yield and the automation level of the riveting point process of the automobile parts.

Description

Mechanical device for bearing riveting process

Technical Field

The utility model relates to a mechanical device for a riveting process, in particular to a mechanical device for a riveting process of automobile parts.

Background

In the past, when a bearing is assembled, the bearing may fall off from a valve body after being used for a certain time at a client side, or the bearing fails due to the internal stress of the bearing assembly. In the traditional bearing assembling process, the following failure modes exist:

1. the riveting points are different in area and are mostly caused by the problem of centering of the bearing and the valve body, and the position of the bearing is not corrected in the riveting point process.

2. The depth of the riveting point is not uniform, and the riveting point is mostly caused by the unevenness of the valve body positioning tool.

3. The problems of insufficient riveting point depth and insufficient disassembly and assembly force are mostly caused by the assembly stroke, and the riveting point process has no displacement and force monitoring.

4. The problem of rivet point fracture is mostly caused by the defects of the stamping die, and the corner cut design of the die is unreasonable.

Therefore, a product is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a mechanical device for a bearing riveting process, which can overcome the problems of large area and uneven depth of riveting points, insufficient assembling and disassembling force and fracture of riveting points, thereby improving the yield and the automation level of the automobile part riveting process.

In order to achieve the purpose, the utility model provides a mechanical device for a bearing riveting point process, which comprises an upper press, an upper bearing positioning tool, a valve body positioning tool, a lower bearing positioning tool and a lower press which are sequentially arranged from top to bottom, wherein the upper press and the lower press are respectively used for assembling an upper bearing and a lower bearing for a valve body, and the upper press is provided with a press with larger load so as to realize riveting on the upper bearing. The upper bearing positioning tool is used for positioning an upper bearing. The valve body positioning tool is used for positioning the valve body. The lower bearing positioning tool is used for positioning a lower bearing.

As preferred mode, valve body location frock includes revolving cylinder, supporting shoe and locating pin. The supporting block is used for supporting the valve body to bear acting force of the upper press and the lower press and realize primary positioning of the valve body. The positioning pin is used for further positioning the X/Y direction of the valve body. The rotary cylinder is used for further positioning the Z direction of the valve body.

Preferably, the positioning pins include a plurality of main positioning pins and a plurality of auxiliary positioning pins sequentially arranged in four directions around the valve body, wherein the main positioning pins are arranged in an X direction on an X direction reference diagonal line for positioning the valve body, and the auxiliary positioning pins are arranged in a Y direction on a Y direction reference diagonal line for positioning the valve body. The rotary cylinder comprises a plurality of rotary cylinders, and the clamping positions of the rotary arms of the rotary cylinders are arranged on the Z direction reference diagonal line and used for positioning the Z direction of the valve body.

As a preferred mode, the upper bearing positioning tool comprises a centering sliding mechanism, a longitudinal movable guide groove body, a pressure spring, a guide rod, a punch and a ball head, wherein the centering sliding mechanism comprises a shifting insertion piece and a transverse moving cylinder. The transverse moving cylinder arm is provided with a shifting insertion piece, and the transverse moving cylinder can freely slide in the transverse horizontal direction so as to adjust the transverse horizontal position of the shifting insertion piece relative to the top end of the guide rod. And the guide rod is arranged in a longitudinal movable guide groove body on the lower side of the shifting insertion piece of the centering sliding mechanism, wherein one end of the pressure spring is supported on the longitudinal movable guide groove body, and the other end of the pressure spring is supported on the guide rod. The pressure spring can push and pull this guide arm along vertical motion of longitudinal movement guide way body, and the lower extreme of guide arm is fixed with drift and bulb in proper order, and wherein, the bulb is elastic telescopic bulb. The punch cannot elastically expand and contract. When the transverse moving cylinder arm extends, the diaphragm which stirs the inserting piece transversely reaches the top of the longitudinal movable guide groove body so as to block the upward return of the guide rod. When the transverse moving cylinder arm is shortened, the hole for stirring the inserting piece transversely reaches the top of the longitudinal movable guide groove body, so that the upward movement of the guide rod is not blocked, and the workpiece is riveted through the punch and the ball head.

Preferably, the poking insertion piece is provided with one or more guide rod through holes, wherein when the transverse moving cylinder arm reaches a specific transverse position, the poking insertion piece transversely moves to a preset retraction position. When the insert is stirred to move transversely to a preset retraction position, the guide rod is concentric with the guide rod through hole, and the guide rod can retract through the guide rod through hole and then rivet a workpiece through the punch and the ball head.

Preferably, the diameter of the guide rod through hole on the poking insert is slightly larger than that of the guide rod, so that the guide rod can just pass through the guide rod through hole. The diameter of the longitudinal movable guide groove body is slightly larger than that of the guide rod, so that the guide rod can flexibly and vertically move along the longitudinal movable guide groove body.

Preferably, the upper bearing positioning tool further comprises a guide rod bushing. And the lower end of the guide rod is fixedly nested and connected with the punch, the guide rod bushing and the ball head from top to bottom and from outside to inside in sequence. The punch, the inner lining and the guide rod are all designed in a profiling mode so as to ensure that the shapes and the sizes of the punch, the inner lining and the guide rod are completely matched and the punch, the inner lining and the guide rod are fastened in an embedded mode and cannot slide.

As a preferred mode, a profiling process design is adopted between the longitudinal movable guide groove body and the guide rod, so that the shape and the size of the longitudinal movable guide groove body and the shape and the size of the guide rod are completely matched and matched, and the longitudinal movable guide groove body and the guide rod are provided with a small gap for the guide rod to flexibly and vertically slide along the longitudinal movable guide groove body.

Preferably, the mechanical device for the bearing riveting process further comprises a two-dimensional code detection device, wherein the two-dimensional code detection device is used for tracking corresponding workpiece numbers and performing error prevention on workpiece models.

Preferably, the mechanical device of the bearing riveting process further comprises a force and displacement detection device, wherein the force and displacement detection device comprises a pressure sensor and a press-mounting displacement calculation chip, and the pressure sensor is directly integrated in the press.

In the traditional bearing assembling process, the following failure modes exist:

1. the riveting points are different in area and are mostly caused by the problem of centering of the bearing and the valve body, and the position of the bearing is not corrected in the riveting point process.

2. The depth of the riveting point is not uniform, and the riveting point is mostly caused by the unevenness of the valve body positioning tool.

3. The problems of insufficient riveting point depth and insufficient disassembly and assembly force are mostly caused by the assembly stroke, and the riveting point process has no displacement and force monitoring.

4. The problem of rivet point fracture is mostly caused by the defects of the stamping die, and the corner cut design of the die is unreasonable.

Compared with the prior art, the assembly mode in the prior art is improved into the mode that after the bearing is assembled, the bearing is fixed by riveting points on the surface of the valve body, so that the bearing is flexibly assembled in the mounting hole, and a plurality of potential quality risks can be avoided.

Compared with the prior art, the utility model has the following advantages:

1. the double-press machine has the advantages of low waste rate and high efficiency due to accurate force application.

2. The three-positioning tool plays its own role, ensures the accurate positioning among the upper bearing, the valve body and the lower bearing in the press fitting process, effectively avoids waste parts, improves the bearing assembly quality and has the yield of 100 percent.

3. The valve body center is supported by the supporting shoe alone, and the supporting shoe chooses the steel that hardness is high for use, can effectively prevent that daily wearing and tearing from causing the inaccurate problem of location to long service life.

4. The form and position tolerance of the valve body and the tool can be obviously reduced by the main positioning mode and the auxiliary positioning mode.

5. The triple positioning structure of the tool of the valve body can ensure 100% accurate press mounting of the upper bearing, the lower bearing and the valve body.

6. The riveting punch adopts special die steel, so that the service life is ensured, and the riveting punch cannot be easily worn or damaged.

7. The section angle of the riveting punch is guaranteed to be +/-0.1 degrees, and the width is guaranteed to be +/-0.01 mm.

8. The riveting punch, the guide rod bushing and the guide rod are designed in a copying mode, and small moving amount is guaranteed so that bearing assembling accuracy is guaranteed.

9. The shifting insertion piece connected with the transverse moving cylinder and the guide groove adopt a profiling design, and smooth movement of the actuating mechanism is guaranteed. When the insert is shifted to be in the original position, the alignment correction of the upper bearing is ensured. When the inserting piece is stirred to extend, the guide rod can be ensured to retract, so that the riveting force can act on the valve body.

10. The force and displacement detection device can accurately control press fitting and force application, and a stamping force control means is adopted to prevent the problems of insufficient riveting point depth and the like caused by the change of the size of the raw material of the valve body.

Drawings

Fig. 1 is a schematic diagram of a mechanical device of the bearing riveting process of the utility model.

Fig. 2 is a detailed schematic diagram of a mechanical device of the bearing riveting process of the utility model.

Fig. 3 is a perspective view of a mechanical device of the bearing riveting process of the utility model.

Fig. 4 is a schematic diagram of the upper bearing positioning tool of the present invention.

Fig. 5 is a perspective view of the upper bearing positioning tool of the present invention.

Fig. 6 is a three-dimensional line structure diagram of the upper bearing positioning tool of the utility model.

Fig. 7 is another three-dimensional line structure diagram of the upper bearing positioning tool of the utility model.

Fig. 8 is a schematic structural view of the riveting point die of the guide rod head of the upper bearing positioning tool of the utility model.

Fig. 9 is a three-dimensional structure view of the riveting point die of the upper bearing positioning tool guide rod head of the utility model.

Fig. 10a is a perspective view of the guide head of the upper bearing positioning tool according to another direction.

Fig. 10b is a perspective view of the guide head of the upper bearing positioning tool according to another direction.

Fig. 11 is a schematic diagram of the valve body positioning tool of the present invention.

Fig. 12 is a schematic detailed view of the valve body positioning tool of the present invention.

Fig. 13 is a detailed structural view of the valve body positioning tool of the present invention.

Fig. 14 is a detailed positioning structure diagram of the valve body positioning tool of the present invention.

Fig. 15 is an assembly flow chart of the mechanical device of the bearing riveting process of the utility model.

Fig. 16a is a front view of the workpiece.

Fig. 16b is a top view of the workpiece.

Fig. 16c is a cross-sectional view of the workpiece.

Fig. 17 is a schematic view of a press-fitting position of the workpiece.

Fig. 18 is a schematic view of the valve body interface dimensions.

Fig. 19 is a schematic view of the dimensions of the upper bearing.

Fig. 20 is a perspective view of the valve body.

Detailed Description

Hereinafter, embodiments of a mechanical apparatus of a bearing staking process of the present invention will be described with reference to the accompanying drawings.

The embodiments described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the utility model. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which employ any obvious replacement or modification of the embodiments described herein.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It should be noted that the drawings are not necessarily drawn to the same scale in order to clearly illustrate the structures of the various elements of the embodiments of the utility model. The same reference numerals are used to designate the same or similar parts. Further, when the description is made with reference to the drawings, directional words such as "upper", "lower", etc. are employed for convenience of description, and they do not constitute specific limitations on the structure of the features.

Example one

As shown in fig. 1 to 3, in this embodiment, the mechanical device of the bearing riveting process includes an upper press 1, an upper bearing positioning tool 2, a valve body positioning tool 3, a lower bearing positioning tool 4, and a lower press 5, which are sequentially arranged from top to bottom, wherein the upper press 1 and the lower press 5 respectively assemble an upper bearing 96 and a lower bearing 98 for a valve body 97, and the upper press 1 is equipped with a press with a larger load so as to rivet the upper bearing 96. The upper bearing positioning tool 2 is used for positioning the upper bearing 96. The valve body positioning tool 3 is used for positioning the valve body 97. The lower bearing positioning tool 4 is used for positioning the lower bearing 98.

Examples of the caulking work of the present invention are shown in fig. 16a, 16b, 16c, 17, 18, 19 and 20. The upper and lower bearings 98 are cylindrical, and the mounting hole of the valve body 97 is also cylindrical. The valve body 97 is structured as shown in fig. 16a, 16b and 16c, wherein the valve body 97 comprises a lower bearing 98 mounting position 91, a riveting position 9292, an upper bearing 96 mounting position 93 and a throat 94. The assembled workpiece can have 5 uniform riveting points. The workpiece shapes and dimensions are described above only to facilitate understanding of the utility model and are not limiting of the utility model. The upper and lower bearing positioning tools and the upper and lower pressing machines can be flexibly adjusted according to the actual shape of the workpiece. In the utility model, only the upper press 1 needs riveting points, the force of the riveting points of the upper press 1 is 10KN, the lower press 5 is assembled with the lower bearing 98 through interference fit, and the assembling force is usually only 4000N.

Further, the mechanical device of the bearing riveting process may further include a start switch 82, an emergency stop processing device 81, and a light curtain 80. The activation switch 82 is used to activate the device. The light curtain 80 provides safety protection and locks the device if a person's hand or other object enters the protected area during operation of the device. The emergency stop processing device 81 can perform power-off and gas-off protection on the equipment in an emergency when the equipment is abnormal.

Furthermore, the utility model may also include a laser detection device for determining whether the workpiece is in place: if the in-place signal is not triggered, the workpiece is judged not to be in place and the equipment cannot be started.

Further, as shown in fig. 11 to 15, the valve body positioning tool 3 includes a rotary cylinder, a supporting block 32, and a positioning pin 33. The supporting block 32 is used to support the valve body 97 to bear the acting force of the upper press 1 and the lower press 5 and to realize the primary positioning of the valve body 97. The positioning pin 33 is used to further position the valve body 97 in the X/Y direction. The rotary cylinder is used to further position the valve body 97 in the Z direction.

In the present invention, the supporting block 32 mainly functions to bear the action force of the press when the valve body 97 is pressed, the action force is about 10KN, and if the supporting is not good, the workpiece may be deformed. The supporting block 32 can effectively prevent the workpiece from deforming. The support blocks 32 may be nylon blocks.

It is further preferable that the positioning pins 33 include a plurality of main positioning pins and a plurality of auxiliary positioning pins, which are sequentially disposed in four directions around the valve body 97, wherein the main positioning pins are disposed in the X direction on the X direction reference diagonal line to position the valve body 97, and the auxiliary positioning pins are disposed in the Y direction on the Y direction reference diagonal line to position the valve body 97. The rotary cylinders (31', 31 ") include a plurality of rotary cylinders, and the clamp positions of the rotary arms of the rotary cylinders are each disposed on a Z-direction reference diagonal line for positioning the Z-direction of the valve body 97.

Specifically, as shown in fig. 14, when the valve body 97 is positioned, the X/Y axis positioning of the product can be ensured not to be biased by 2 main positioning pins and 2 auxiliary positioning pins. And the positioning in the Z-axis direction can depend on two rotary cylinders, and the rotary cylinders can move by 90 degrees. The structure and position of the main positioning pins (331 ', 331 ") and the auxiliary positioning pins (332', 332") can be seen in fig. 14, wherein the valve body positioning position is seen in the valve body fixing positions (951, 952, 953, 954) of fig. 14.

Example two

Compared with the first embodiment, as shown in fig. 4 to 9, the difference of the second embodiment is that the upper bearing positioning tool 2 of the mechanical device of the bearing riveting process comprises a centering sliding mechanism, a longitudinally movable guide groove body 23, a pressure spring 24, a guide rod 25, a punch 26 and a ball head 28, wherein the centering sliding mechanism comprises a shifting insertion sheet 22 and a transverse moving cylinder 21. The transverse moving cylinder arm of the transverse moving cylinder 21 is provided with a poking inserting piece 22, and the transverse moving cylinder 21 can freely slide in the transverse horizontal direction so as to adjust the transverse horizontal position of the poking inserting piece 22 relative to the top end of the guide rod 25. And, the guide arm 25 is set up in the longitudinal movable guide slot body 23 of the lower side of the stirring inserted sheet 22 of the centering sliding mechanism, wherein, one end of the pressure spring 24 is supported on the longitudinal movable guide slot body 23, another end is supported on the guide arm 25. The pressure spring 24 can push and pull the guide rod 25 to vertically move up and down along the longitudinal movable guide groove body 23, a punch 26 and a ball head 28 are sequentially fixed at the lower end of the guide rod 25, and the ball head 28 is an elastic and telescopic ball head 28. The punch 26 cannot elastically expand and contract. When the transverse moving cylinder arm of the transverse moving cylinder 21 extends, the diaphragm 221 which stirs the inserting piece 22 transversely reaches the top of the longitudinal moving guide groove body 23 so as to block the upward retraction of the guide rod 25. When the transverse moving cylinder arm of the transverse moving cylinder 21 is shortened, the hole for shifting the inserting piece 22 transversely reaches the top of the longitudinal movable guide groove body 23 so as not to block the upward return of the guide rod 25 and further rivet the workpiece through the punch 26 and the ball head 28.

Specifically, when the lateral movement cylinder 21 is in the initial position, the guide rod 25 can ensure that the upper bearing 96 is centered and corrected; the centering correction mainly ensures the accuracy of the upper bearing 96 when it is installed. According to the utility model, the problems that the depth of the riveting point is not uniform and the positioning tool 3 is mostly uneven by the valve body can be effectively solved by means of the processing precision and tool centering of the upper pressure head riveting point tool.

During press-fitting, the press-fitting surface of the guide rod 25 is smaller than the force-bearing surface of the upper bearing 96. The ball 28 can avoid the problem of excessive action positioning tolerance when the user puts the hand on the device. The punch 26 and the ball 28 are two separate pieces, and the ball 28 is fixed on the guide rod 25, mainly performs centering correction on the upper bearing 96 and is retractable during the press-fitting process. Without the punch 26 retracting. How much the guide rod 25 enters depends on the depth of the mounting hole on the valve body 97, the displacement through the press is controllable, and the press stops after the displacement to the set position.

Further, the poking insert 22 is provided with one or more guide rod through holes 222, wherein when the lateral moving cylinder arm of the lateral moving cylinder 21 reaches a specific lateral position, the poking insert 22 is laterally moved to a preset retraction position. When the inserting piece 22 is shifted to move transversely to the preset retraction position, the guide rod 25 is concentric with the guide rod through hole 222, and at the moment, the guide rod 25 can retract through the guide rod through hole 222 so as to rivet a workpiece through the punch 26 and the ball head 28. During movement, the guide rod 25 retracts due to being pressed by the upper bearing 96, and the front end of the guide rod 25 contacts the upper bearing 96 first.

Specifically, when the cylinder is in this position, the guide rod 25 cannot be retracted because the guide rod 25 is blocked by the poke insert 22; when the cylinder stretches, the round hole in the middle of the poking insert 22 coincides with the guide rod 25, and then the guide rod 25 can retract. The workpiece can be riveted at this time.

This embodiment further preferably has the guide rod through hole 222 on the poke insert 22 having a slightly larger diameter than the guide rod 25, such that the guide rod 25 is sized to fit through the guide rod through hole 222. The diameter of the longitudinal movable guide groove body 23 is slightly larger than that of the guide rod 25, so that the guide rod 25 can flexibly move vertically along the longitudinal movable guide groove body 23.

In this embodiment, as shown in fig. 10a and 10b, the upper bearing positioning tool 2 further includes a guide rod bushing 27. The section angle and the material of the riveting point die (guide rod 25 head structure) of the upper bearing positioning tool 2 are important for the final shape of the riveting point. And the lower end of the guide rod 25 is fixedly nested and connected with a punch 26, a guide rod bush 27 and a ball head 28 from top to bottom and from outside to inside in sequence. The punch 26, the guide rod bushing 27 and the guide rod 25 are designed in a profiling way to ensure that the punch, the guide rod bushing and the guide rod are completely matched in shape and size and are tightly nested without any sliding.

Furthermore, a copying process design is adopted between the longitudinal movable guide groove body 23 and the guide rod 25, so that the shape and the size of the longitudinal movable guide groove body 23 and the size of the guide rod 25 are completely matched and matched, and a small gap is formed between the longitudinal movable guide groove body 23 and the guide rod 25 so that the guide rod 25 can flexibly and vertically slide along the longitudinal movable guide groove body 23.

Furthermore, the mechanical device of the bearing riveting process further comprises a two-dimensional code detection device 6, wherein the two-dimensional code detection device 6 is used for tracking the corresponding workpiece number and performing error prevention on the workpiece model.

Specifically, the two-dimensional code detection device 6 uploads the information of the product process to the server through the two-dimensional code scanning to track the workpiece. In addition, the two-dimension code detection device 6 can also perform workpiece mistake proofing, the two-dimension code contains product model information, and once the two-dimension code is inconsistent with the equipment model selection, the two-dimension code detection device 6 can give an alarm.

Furthermore, the mechanical device of the bearing riveting point process further comprises a force and displacement detection device 7, wherein the force and displacement detection device 7 comprises a pressure sensor and a press-mounting displacement calculation chip, and the pressure sensor is directly integrated in the press.

Furthermore, the upper bearing positioning tool 2, the lower bearing positioning tool 4 and the valve body positioning tool 3 of the mechanical device of the bearing riveting process of the present invention may be detachable, which is to produce different valve bodies 97. Specifically, the upper bearing positioning tool 2, the lower bearing positioning tool 4 and the valve body positioning tool 3 are fixed on the integral frame through pin structures. The bearing positioning tool is positioned on the pressure head through a pin structure, and the valve body positioning tool is positioned on the machine tool through the pin structure and a screw mechanism. Like this, go up bearing location frock 2, lower bearing location frock 4 and valve body location frock 3 and all can carry out free replacement according to work piece actual dimension needs, and then realize that the frock trades the type fast and maintains the maintenance.

The specific steps of the tool changing comprise:

a, the upper bearing positioning tool 2 is taken out after the positioning pins 33 on the two sides are loosened and pulled down;

b. "valve body positioning tool 3", two positioning screws 34 and two positioning pins 33 are loosened, and the tool can be taken out by pulling outwards.

As shown in fig. 15, the operation flow of the present invention is as follows:

1. putting the valve body 97, the upper bearing 96 and the lower bearing 98 into the positioning tool, and positioning the tool position in the figures 1-3;

2. pressing the "start switch 82" button;

3. the two-dimensional code detection device 6 on the left side of the equipment identifies the two-dimensional code on the valve body 97;

two rotary cylinders on the valve body positioning tool 3 clamp the valve body 97 through rotation;

5, driving the upper bearing positioning tool 2 to move downwards by the upper press 1;

the transverse moving cylinder 21 is kept at the initial position at the moment, the guide rod 25 in the upper bearing positioning tool 2 is ensured to perform centering correction on the upper bearing 96, and the compression force of the spring directly acts on the shifting insertion piece 22 at the moment; the ball head 28 at the upper end of the guide rod 25 ensures that the guide rod 25 can smoothly enter the central hole of the upper bearing 96;

7, the upper bearing 96 completely enters the mounting hole of the valve body 97, the upper press 1 moves upwards, the upper bearing 96 is separated from the tool, the transverse moving cylinder 21 moves leftwards to be in an extension state, and the guide rod 25 is changed into a retractable state;

continuing to move the upper press 1 downwards, retracting the guide rod 25 and completing final riveting of the valve body 97;

9, detecting whether the force and the position in the riveting process of the upper press 1 exceed the specification or not through a program;

"the upper press 1" returns to the zero point;

"hold-down press 5" rises;

continuing to lift the lower press 5 to complete the assembly of the lower bearing 98;

the lower press 5 detects whether the force and the position exceed the specification in the riveting process through a force and displacement detection device 7;

"lower press 5 returns to zero";

two rotary cylinders on the valve body positioning tool 3 release the valve body 97;

16. the assembled "valve body 97" is removed.

In the past, when the bearing is assembled, the bearing may fall off from the valve body 97 after being used for a certain time at a client end, or the bearing fails due to the internal stress of the bearing assembly. In view of this, the present invention improves the previous assembly method to fix the bearing by performing "riveting" on the surface of the valve body 97 after the bearing is assembled, so that the bearing is flexibly assembled in the mounting hole, thereby avoiding many potential quality risks.

In the traditional bearing assembling process, the following failure modes exist:

1. the riveting points are different in area and mostly caused by the problem of centering between the bearing and the valve body 97, and the position of the bearing is not corrected in the riveting point process.

2. The depth of the riveting point is uneven, and the riveting point is mostly caused by the unevenness of the valve body positioning tool 3.

3. The problems of insufficient riveting point depth and insufficient disassembly and assembly force are mostly caused by the assembly stroke, and the riveting point process has no displacement and force monitoring.

4. The problem of rivet point fracture is mostly caused by the defects of the stamping die, and the corner cut design of the die is unreasonable.

The new design requirements bring great challenges to process development, the riveting point needs higher stamping force, the positioning support of the tool, the raw materials and the material of the die thereof have high requirements, and the one-time investment of the equipment is higher. The utility model mainly improves the workpiece positioning in the riveting point assembling process and realizes the riveting point function. The device can be generally applied to the process procedure with higher assembly precision, self-corrects the workpiece through reasonable support design and positioning design of the clamp, monitors the process output force and displacement, and can effectively ensure the assembly quality of the product.

Compared with the prior art, the assembly mode in the prior art is improved into the mode that after the bearing is assembled, the bearing is fixed by riveting points on the surface of the valve body 97, so that the bearing is flexibly assembled in the mounting hole, and a plurality of potential quality risks can be avoided.

Compared with the prior art, the utility model has the following advantages:

1. the double-press machine has the advantages of low waste rate and high efficiency due to accurate force application.

2. The three-positioning tool plays its own role, ensures the accurate positioning among the upper bearing 96, the valve body 97 and the lower bearing 98 in the press mounting process, effectively avoids waste parts, improves the bearing assembly quality and has the yield of 100 percent.

3. The center of the valve body 97 is supported by the supporting block 32 alone, the supporting block 32 is made of steel with high hardness, the problem of inaccurate positioning caused by daily abrasion can be effectively prevented, and the service life is long.

4. The form and position tolerance of the valve body 97 and the tool can be obviously reduced by the main positioning and the auxiliary positioning.

5. The triple positioning structure of the tooling of the valve body 97 can ensure 100% accurate press-fitting of the upper and lower bearings 98 and the valve body 97.

6. The riveting punch 26 is made of special die steel, so that the service life is ensured, and the riveting punch cannot be easily worn or damaged.

7. The angle of the section of the riveting punch 26 is ensured to be +/-0.1 degrees, and the width is ensured to be +/-0.01 mm.

8. The riveting punch 26, the guide rod bushing 27 and the guide rod 25 adopt a profiling design, so that a small moving amount is ensured, and the bearing assembling precision is ensured.

9. The shifting insertion piece 22 connected with the transverse moving cylinder 21 and the guide groove adopt a profiling design, and smooth movement of the actuating mechanism is ensured. The insert 22 is shifted to ensure alignment of the upper bearing 96 when in place. When the inserting piece 22 is pulled to be extended, the guide rod 25 can be retracted, so that the riveting force can act on the valve body 97.

10. The force and displacement detecting device 7 can accurately control the press fitting and force application, and a punching force control means is adopted to prevent the problems of insufficient riveting point depth and the like caused by the change of the size of the raw material of the valve body 97.

The embodiments of the mechanical device of the bearing staking process according to the present invention have been described above for the purpose of explaining the spirit of the present invention. Note that those skilled in the art can modify and combine the features of the above-described embodiments without departing from the spirit of the present invention, and therefore, the present invention is not limited to the above-described embodiments. The specific features, such as shape, size and location, of the mechanical device for the bearing staking process of the present invention can be specifically designed by the action of the features disclosed above, all of which can be accomplished by one skilled in the art. Moreover, the technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the utility model to achieve the aim of the utility model.

Claims (10)

1. A mechanical device for a bearing riveting process is characterized by comprising an upper press, an upper bearing positioning tool, a valve body positioning tool, a lower bearing positioning tool and a lower press which are sequentially arranged from top to bottom, wherein,

the upper press and the lower press are respectively provided with an upper bearing and a lower bearing for the valve body, wherein the upper press is provided with a press with larger load so as to realize riveting of the upper bearing;

the upper bearing positioning tool is used for positioning an upper bearing;

the valve body positioning tool is used for positioning the valve body;

the lower bearing positioning tool is used for positioning a lower bearing.

2. The mechanical device for the bearing riveting point process according to claim 1, wherein the valve body positioning tool comprises a rotary cylinder, a supporting block and a positioning pin; wherein,

the supporting block is used for supporting the valve body to bear acting force of the upper press and the lower press and realize primary positioning of the valve body;

the positioning pin is used for further positioning the X/Y direction of the valve body;

the rotary cylinder is used for further positioning the Z direction of the valve body.

3. The mechanical device for the bearing riveting point process according to claim 2,

the positioning pins comprise a plurality of main positioning pins and a plurality of auxiliary positioning pins which are sequentially arranged in four directions around the valve body, wherein the main positioning pins are arranged on an X-direction reference diagonal line for positioning the X direction of the valve body, and the auxiliary positioning pins are arranged on a Y-direction reference diagonal line for positioning the Y direction of the valve body;

the rotary cylinder comprises a plurality of rotary cylinders, and the clamping positions of the rotary arms of the rotary cylinders are arranged on the Z direction reference diagonal line and used for positioning the Z direction of the valve body.

4. The mechanical device for the bearing riveting point process according to claim 1, wherein the upper bearing positioning tool comprises a centering sliding mechanism, a longitudinal movable guide groove body, a pressure spring, a guide rod, a punch and a ball head, wherein the centering sliding mechanism comprises a shifting insertion sheet and a transverse moving cylinder;

the transverse moving cylinder arm is provided with the poking insertion piece, and the transverse moving cylinder can freely slide in the transverse horizontal direction so as to adjust the transverse horizontal position of the poking insertion piece relative to the top end of the guide rod; and,

the guide rod is arranged in a longitudinal movable guide groove body on the lower side of the shifting insertion piece of the centering sliding mechanism, wherein one end of the pressure spring is supported on the longitudinal movable guide groove body, and the other end of the pressure spring is supported on the guide rod;

the pressure spring can push and pull the guide rod to vertically move up and down along the longitudinal movable guide groove body, the punch and the ball head are sequentially fixed at the lower end of the guide rod, and the ball head is an elastic and telescopic ball head; the punch cannot elastically stretch and retract;

when the transverse moving cylinder arm extends, the membrane for shifting the inserting sheet transversely reaches the top of the longitudinal movable guide groove body so as to block the guide rod from moving upwards and retreating;

when the transverse moving cylinder arm is shortened, the hole for stirring the inserting piece transversely reaches the top of the longitudinal movable guide groove body, so that the guide rod is not blocked from moving upwards and returning, and the workpiece is riveted through the punch and the ball head.

5. The mechanical device for the bearing riveting point process according to claim 4, wherein one or more guide rod through holes are arranged on the toggle insert,

when the transverse moving cylinder arm reaches a specific transverse position, the poking insertion piece transversely moves to a preset retraction position;

when the poking insert transversely moves to a preset retraction position, the guide rod is concentric with the guide rod through hole, and at the moment, the guide rod can retract through the guide rod through hole and then rivet a workpiece through the punch and the ball head.

6. The mechanical device for the bearing riveting point process according to claim 5,

the diameter of the guide rod through hole on the shifting insertion piece is slightly larger than that of the guide rod, so that the guide rod can just pass through the guide rod through hole;

the diameter of the longitudinal movable guide groove body is slightly larger than that of the guide rod, so that the guide rod can flexibly and vertically move along the longitudinal movable guide groove body.

7. The mechanical device for the bearing riveting point process according to claim 5, wherein the upper bearing positioning tool further comprises a guide rod bushing; and,

the lower end of the guide rod is fixedly nested and connected with the punch, the guide rod bushing and the ball head from top to bottom and from outside to inside in sequence;

the punch, the inner lining and the guide rod are all designed in a profiling mode, so that the punch, the inner lining and the guide rod are completely matched in shape and size, and the punch, the inner lining and the guide rod are fastened in an embedded mode and cannot slide.

8. The mechanical device for the bearing riveting point process according to claim 6,

the longitudinal movable guide groove body and the guide rod are designed by adopting a profiling process, so that the shape and the size of the longitudinal movable guide groove body and the shape and the size of the guide rod are completely matched and matched, and a small gap is formed between the longitudinal movable guide groove body and the guide rod so that the guide rod can flexibly and vertically slide along the longitudinal movable guide groove body.

9. The mechanical device for the bearing riveting point process according to claim 1, further comprising a two-dimensional code detection device, wherein,

the two-dimensional code detection device is used for tracking corresponding workpiece numbers and preventing errors of workpiece models.

10. The mechanical device for the bearing riveting point process according to claim 1, which is characterized by further comprising a force and displacement detection device, wherein,

the force and displacement detection device comprises a pressure sensor and a press-mounting displacement calculation chip, and the pressure sensor is directly integrated in the press.

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