A secure centering positioning mechanism

Abstract

This invention relates to a stable centering and positioning mechanism, comprising a support base, a reference base for supporting a machining bracket arranged at the center of the end wall of the support base, a positioning structure set at the end wall of the support base adjacent to the reference base, and a centering cylinder for cooperating with the positioning structure, the end of the centering cylinder being drivenly connected to an upper pressure plate and a lower pressure plate for clamping and positioning the end of the machining bracket. The beneficial effects of this invention are: this stable centering and positioning mechanism, through the positioning structure used to press and position the machining bracket placed on the upper end of the reference base, and the lower pressure plate of the centering cylinder supporting the end of the machining bracket, and cooperating with the upper pressure plate pressing down on the end of the machining bracket, forming a clamping limit to stabilize and limit the end of the machining bracket. Simultaneously, the upper and lower pressure plates rotate under the drive of the centering cylinder, their ends moving closer together to stabilize and center the end of the machining bracket, preventing the end of the machining bracket from being positioned too high or too low, thus affecting the subsequent processing effect.

Description

Technical Field

[0001] This invention relates to the field of positioning mechanism technology, specifically to a stable centering positioning mechanism. Background Technology

[0002] During milling, drilling, and other cutting processes, thin-walled support parts are prone to elastic deformation and machining chatter due to insufficient rigidity of their cantilever structure, resulting in out-of-tolerance dimensional accuracy and form and position tolerances. To solve this problem, the industry standard solution is to install an upper clamping structure on the support area, combined with a bottom floating support cylinder for reverse support, thereby reinforcing the local rigidity of the workpiece and suppressing machining deformation.

[0003] To ensure the positional accuracy and coaxiality of the upper and lower features, some bracket parts require the upper and lower end faces, mounting holes, and other features to be machined in the same clamping process. In this case, the support end of the bottom floating support cylinder will directly block the machining area of ​​the lower surface of the workpiece, interfering with the tool movement and making it impossible to machine the upper and lower areas in sequence. If the bottom support is removed, it is difficult to offset the cutting force by pressing on the top alone, and the workpiece is prone to warping and displacement. The traditional form of reverse top plus floating support also has the defects of large centering deviation and uneven support force, which cannot meet the production requirements of stable machining of high-precision bracket parts. Summary of the Invention

[0004] The purpose of this invention is to provide a stable centering positioning mechanism to solve the problem mentioned in the background art. In order to ensure the positional accuracy and coaxiality of the upper and lower features, some bracket parts require the upper and lower end faces, mounting holes and other features to be processed in the same clamping process. At this time, the support end of the bottom floating support cylinder will directly block the processing area of ​​the lower surface of the workpiece, interfere with the tool path and make it impossible to achieve sequential processing of the upper and lower areas. If the bottom support is removed, it is difficult to offset the cutting force by pressing on the upper part alone, and the workpiece is prone to warping and displacement. The traditional form of reverse top plus floating support also has the defects of large centering deviation and uneven support force, which cannot meet the production requirements of stable processing of high-precision bracket parts.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a stable centering positioning mechanism, comprising a bearing seat, a reference seat for supporting a processing bracket is arranged at the center of the end wall of the bearing seat, a positioning structure is set at the end wall of the bearing seat near the reference seat, and a centering cylinder for cooperating with the positioning structure is provided at the end wall of the bearing seat near the reference seat, and an upper pressure plate and a lower pressure plate for clamping the end of the positioning processing bracket are connected at the end of the centering cylinder.

[0006] Preferably, the upper pressure plate and the lower pressure plate are located at the upper and lower ends of the centering cylinder, respectively, and are connected to the centering cylinder through a shaft. The centering cylinder drives the upper pressure plate and the lower pressure plate to rotate around the shaft, and the ends of the upper pressure plate and the lower pressure plate rotate towards each other and fit together to form a clamping shape.

[0007] Preferably, the lower wall of the front end of the upper pressure plate extends downward to form a protrusion and has a toothed wall, while the upper wall of the front end of the lower pressure plate extends upward to form a protrusion and has a striped wall.

[0008] Preferably, a side seat is fixed to the side wall of the cylinder, and a spherical secondary mandrel is fixed to the front wall of the side seat. The front end of the secondary mandrel protrudes outward from the front wall of the side seat to push and limit the machining bracket.

[0009] Preferably, the end wall at the center of the upper end of the bearing seat is fixedly connected to the reference seat, and three through holes are provided between the bearing seat and the reference seat and the positioning structure. At the same time, the bearing seat is L-shaped, and the positioning structure, through holes and reference seat are all arranged at the bottom top wall of the bearing seat.

[0010] Preferably, the positioning structure includes a side corner cylinder fixed to the upper left front side near the bottom of the bearing seat, a front straight-push cylinder fixed to the upper left rear side, and a rear straight-push cylinder fixed to the upper right rear side.

[0011] Preferably, the positioning structure further includes a rotary cylinder fixedly connected to the inner sidewall of the upper wall near the bearing seat, and a rotating head for positioning the sidewall of the support is connected to the end of the rotary cylinder.

[0012] Preferably, the front pressure head is driven to the end of the front straight cylinder, and the rear pressure head is driven to the end of the rear straight cylinder. The ends of the front and rear pressure heads form downward barbs, and the barb ends press down to limit the machining bracket.

[0013] Preferably, the side angle cylinder end is connected to the side angle top, and the side angle top is arranged flat and used for lateral positioning and positioning of the side wall of the support.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses a positioning structure to press and position the processing bracket placed on the upper end of the reference base. The lower pressure plate of the centering cylinder supports the end of the processing bracket, and the upper pressure plate presses down on the end of the processing bracket to form a clamping limit, thereby stabilizing and limiting the end of the processing bracket. At the same time, the upper and lower pressure plates rotate under the drive of the centering cylinder, and their ends move closer to each other to stabilize and center the end of the processing bracket, preventing the end of the processing bracket from being positioned too high or too low, which would affect the subsequent processing effect. The processing bracket is the material positioned by this positioning mechanism. During processing, the processing bracket is prone to deformation, so a pressing support cylinder needs to be added to the bracket part. In order to ensure dimensional accuracy, both the upper and lower areas of the bracket need to be processed in sequence. The lower part cannot be supported by a floating cylinder. The centering cylinder is used instead of the traditional anti-top + floating support form to directly hold the product bracket and achieve the purpose of stable processing.

[0015] 2. In this invention, the rotating cylinder shaft causes the upper and lower pressure plates to rotate around the shaft, bringing their ends closer together to press and limit the material component. This facilitates centering the material, prevents it from deviating upwards or downwards, and stabilizes the material. The secondary top head assists the upper and lower pressure plates from the side, fitting and abutting against the end face of the positioning material component to securely limit the material.

[0016] 3. The present invention has three openings for ventilation and heat dissipation, which enhances the heat dissipation performance during material processing and also facilitates the movement and extension of processed parts, such as drill bits, from the openings. A reference seat is arranged at the bottom end wall of the bearing seat to support the material parts, provide support and limit the bearing of the material, and stabilize the material.

[0017] 4. The rotating cylinder end of the present invention is connected to a rotating head for positioning the side wall of the support. When the rotating cylinder runs, it drives the rotating head to rotate. The end wall of the rotating head rotates and approaches the side wall of the material and fits against it, pressing and limiting it from the side wall of the material.

[0018] 5. In this invention, the front straight-push cylinder drives the front pressure head to press down on the left side of the upper wall of the processing bracket, and the rear straight-push cylinder drives the rear pressure head to press down on the right side of the upper wall of the processing bracket, pressing and limiting the upper end of the material in the processing bracket, and stabilizing and positioning the processing bracket. Under the drive of the side angle cylinder, the side angle top head is driven to move laterally to press against the front side wall of the processing bracket, and cooperates with the rotating head to limit the rear side wall of the processing bracket, forming a clamp to stabilize and limit the processing bracket. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a stable centering positioning mechanism according to the present invention; Figure 2 This is a schematic diagram of the reference base structure at the bearing seat of a stable centering positioning mechanism according to the present invention; Figure 3 This is a schematic diagram of the support structure of a stable centering positioning mechanism according to the present invention; Figure 4 This is a schematic diagram of the alignment cylinder structure at the bearing seat of a stable alignment positioning mechanism according to the present invention. Figure 5 This is a schematic diagram of the bottom structure of the support base of a stable centering positioning mechanism according to the present invention; Figure 6 This is a schematic diagram of the centering cylinder structure of a stable centering positioning mechanism according to the present invention; Figure 7 This is a schematic diagram of the bottom structure of the centering cylinder of a stable centering positioning mechanism according to the present invention; Figure 8 This is a three-dimensional structural diagram of a processing support for a stable centering positioning mechanism according to the present invention.

[0020] In the diagram: 1. Bearing seat; 2. Reference seat; 3. Through port; 4. Side angle cylinder; 5. Front straight cylinder; 6. Rear straight cylinder; 7. Rotary cylinder; 8. Front pressure head; 9. Side angle mandrel; 10. Rear pressure head; 11. Centering cylinder; 12. Side seat; 13. Secondary mandrel; 14. Upper pressure plate; 15. Lower pressure plate. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Please see Figure 1-8This invention provides a technical solution: a stable centering positioning mechanism, including a support base 1, a reference base 2 for supporting a processing bracket arranged at the center of the end wall of the support base 1, a positioning structure set at the end wall of the support base 1 near the reference base 2, and a centering cylinder 11 for cooperating with the positioning structure at the end wall of the support base 1 near the reference base 2. An upper pressure plate 14 and a lower pressure plate 15 for clamping and positioning the end of the processing bracket are connected to the end of the centering cylinder 11. The positioning structure is used to press and position the processing bracket placed on the upper end of the reference base 2, and the lower pressure plate 15 of the centering cylinder 11 supports the end of the processing bracket, while the upper pressure plate 14 presses down on the end of the processing bracket, forming... The clamping and limiting mechanism stabilizes the end of the processing bracket. Simultaneously, the upper pressure plate 14 and lower pressure plate 15 rotate under the drive of the centering cylinder 11, bringing their ends closer together to stabilize and center the end of the processing bracket. This prevents the end of the processing bracket from being positioned too high or too low, which would affect the subsequent processing effect. The processing bracket is the material positioned by this positioning mechanism. During processing, the processing bracket is prone to deformation, so a clamping support cylinder needs to be added to the bracket part. To ensure dimensional accuracy, both the upper and lower areas of the bracket need to be processed in sequence. The lower part cannot be supported by a floating cylinder. Therefore, the centering cylinder 11 is used instead of the traditional anti-top + floating support form to directly hold the product bracket and achieve the purpose of stable processing. The upper pressure plate 14 and the lower pressure plate 15 are located at the upper and lower ends of the centering cylinder 11, respectively, and are connected to the centering cylinder 11 through a shaft. The centering cylinder 11 drives the upper pressure plate 14 and the lower pressure plate 15 to rotate around the shaft. The ends of the upper pressure plate 14 and the lower pressure plate 15 rotate towards each other and form a clamping shape. When the shaft of the centering cylinder 11 rotates, the upper pressure plate 14 and the lower pressure plate 15 rotate around the shaft, and the ends approach each other to press and limit the material, which facilitates centering the material, prevents the material from deviating upward or downward, and stabilizes the material. The lower wall of the front end of the upper pressure plate 14 extends downward to form a protrusion and has a toothed wall, while the upper wall of the front end of the lower pressure plate 15 extends upward to form a protrusion and has a striped wall. The toothed wall of the upper pressure plate 14 and the striped wall of the lower pressure plate 15 are used to increase friction so as to fit more firmly with the end wall of the material and be more stable when clamping and positioning. A side seat 12 is fixed to the side wall of the cylinder 11. A spherical secondary head 13 is fixed to the front wall of the side seat 12. The front end of the secondary head 13 protrudes outward from the front wall of the side seat 12 to push and limit the machining bracket. The secondary head 13 assists in cooperating with the upper pressure plate 14 and the lower pressure plate 15 from the side end to fit against and abut the end face of the positioning material to stabilize and limit the material. The upper center end wall of the bearing seat 1 is fixedly connected to the reference seat 2. There are three through holes 3 between the bearing seat 1 and the reference seat 2 and the positioning structure. The bearing seat 1 is L-shaped. The positioning structure, through holes 3 and reference seat 2 are all arranged at the bottom and top end wall of the bearing seat 1. There are three through holes 3 for ventilation and heat dissipation to enhance the heat dissipation performance during material processing. It also facilitates the movement and extension of processed parts, such as drill bits, from the through holes 3. The reference seat 2 is arranged at the bottom end wall of the bearing seat 1 to support the material parts, support and limit the load of the material, and stabilize the material. The positioning structure includes a side corner cylinder 4 fixed to the upper left front side near the bottom of the support seat 1, a front straight cylinder 5 fixed to the upper left rear side, and a rear straight cylinder 6 fixed to the upper right rear side. The positioning structure also includes a rotary cylinder 7 fixed to the inner side wall of the support seat 1 near the upper wall. The end of the rotary cylinder 7 is connected to a rotating head for positioning the side wall of the support bracket. When the rotary cylinder 7 is running, it drives the rotating head to rotate. The end wall of the rotating head rotates from the side wall of the material and approaches and fits against it, pressing and limiting it from the side wall of the material. The front straight cylinder 5 is connected to the front pressure head 8 at its end, and the rear straight cylinder 6 is connected to the rear pressure head 10 at its end. The ends of the front pressure head 8 and the rear pressure head 10 form downward hooks. The hook ends press down to limit the processing bracket. The front straight cylinder 5 drives the front pressure head 8 to press down on the left side of the upper wall of the processing bracket, and the rear straight cylinder 6 drives the rear pressure head 10 to press down on the right side of the upper wall of the processing bracket, thus pressing and limiting the upper end of the material in the processing bracket and stabilizing the positioning of the processing bracket. The side angle cylinder 4 is connected to the side angle top head 9 by a transmission. The side angle top head 9 is arranged flat and is used to laterally limit and position the side wall of the processing bracket. Under the transmission of the side angle cylinder 4, the side angle top head 9 is driven to move laterally to press against the front side wall of the processing bracket. It works in conjunction with the rotating head to limit the back side wall of the processing bracket, forming a clamp to stabilize and limit the processing bracket.

[0025] In summary, this stable centering positioning mechanism, when in use, A reference base 2 is arranged at the bearing seat 1 to place the processing support materials and provide load-bearing support; The centering cylinder 11 drives the upper pressure plate 14 and the lower pressure plate 15 to rotate and clamp the end of the material of the processing bracket, and perform clamping and limiting. In conjunction with the secondary top head 13 at the side seat 12, it pushes the right front side wall of the material of the processing bracket to quickly stabilize and center the material. Side angle cylinder 4, front straight cylinder 5, rear straight cylinder 6, and rotary cylinder 7 operate respectively, driving the side angle top head 9, front pressure head 8, rear pressure head 10, and rotating head to approach the end wall of the processing bracket, pressing and limiting the material of the processing bracket, and firmly positioning the material of the processing bracket to facilitate subsequent stable processing of the material of the processing bracket. The three openings not only facilitate ventilation and heat dissipation at the processing location, but also make it convenient to process parts, such as drill bits extending from the three openings to process the support material from the bottom. The centering positioning machining bracket ensures the positional accuracy and coaxiality of the upper and lower features. There is no need to set a floating support cylinder at the bottom, and the support end will never directly block the machining area of ​​the lower surface of the workpiece, interfering with the tool path. This allows for sequential machining of the upper and lower areas. In addition, the machining bracket can be clamped to offset the cutting force, and the workpiece is less likely to warp or shift. Compared with the traditional anti-top plus floating support, it has the advantages of small centering deviation and balanced support force, meeting the production requirements of stable machining of high-precision bracket parts. This structure is designed for assembly on a lathe, and multiple units can be installed simultaneously.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A stable centering positioning mechanism, comprising a support base (1), characterized in that: The bearing seat (1) has a reference seat (2) arranged at the center of the end wall for supporting the processing bracket. The bearing seat (1) has a positioning structure at the end wall of the side of the reference seat (2). The bearing seat (1) has a centering cylinder (11) that works with the positioning structure at the end wall of the side of the reference seat (2). The end of the centering cylinder (11) is connected to an upper pressure plate (14) and a lower pressure plate (15) for clamping the end of the positioning processing bracket.

2. The stable centering positioning mechanism according to claim 1, characterized in that: The upper pressure plate (14) and lower pressure plate (15) are located at the upper and lower ends of the centering cylinder (11) respectively, and are connected to the centering cylinder (11) through a shaft. The centering cylinder (11) drives the upper pressure plate (14) and lower pressure plate (15) to rotate around the shaft. The ends of the upper pressure plate (14) and lower pressure plate (15) rotate towards each other and form a clamping shape.

3. The stable centering positioning mechanism according to claim 2, characterized in that: The lower wall of the front end of the upper pressure plate (14) extends downward to form a protrusion and has a toothed wall, while the upper wall of the front end of the lower pressure plate (15) extends upward to form a protrusion and has a striped wall.

4. The stable centering positioning mechanism according to claim 3, characterized in that: The side seat (12) is fixed to the side wall of the cylinder (11), and a spherical secondary head (13) is fixed to the front wall of the side seat (12). The front end of the secondary head (13) protrudes outward from the front wall of the side seat (12) to push the limiting machining bracket.

5. A stable centering positioning mechanism according to claim 4, characterized in that: The upper center of the bearing seat (1) is fixedly connected to the reference seat (2). There are three through holes (3) between the bearing seat (1) and the reference seat (2) and the positioning structure. The bearing seat (1) is L-shaped. The positioning structure, through holes (3) and reference seat (2) are all arranged at the bottom top wall of the bearing seat (1).

6. The stable centering positioning mechanism according to claim 5, characterized in that: The positioning structure includes a side corner cylinder (4) fixed to the upper left front side near the bottom of the support seat (1), a front straight cylinder (5) fixed to the upper left rear side, and a rear straight cylinder (6) fixed to the upper right rear side.

7. A stable centering positioning mechanism according to claim 6, characterized in that: The positioning structure also includes a rotary cylinder (7) fixed to the bearing seat (1) near the inner side wall of the upper wall, and a rotating head for positioning the side wall of the support is connected at the end of the rotary cylinder (7).

8. A stable centering positioning mechanism according to claim 7, characterized in that: The front straight cylinder (5) is connected to the front pressure head (8) at the end, and the rear straight cylinder (6) is connected to the rear pressure head (10) at the end. The ends of the front pressure head (8) and the rear pressure head (10) form downward barbs, and the barb ends press down to limit the processing bracket.

9. A stable centering positioning mechanism according to claim 8, characterized in that: The side angle cylinder (4) is connected to the side angle top head (9) at the end of the transmission. The side angle top head (9) is arranged flat and is used for lateral positioning and machining of the side wall of the bracket.

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