Positioning and fastening tool for automatic machining

Abstract

The invention relates to the technical field of positioning and fastening clamps, in particular to a positioning and fastening tool for automatic machining, which comprises a pressure head positioned above an upper plate and inserted and matched with a through hole of the upper plate, a double-thread screw extending to an inner cavity of a support cylinder is mounted on the pressure head in a relatively rotating manner, and two groups of tensioning components are mounted on reverse threads at two ends of the double-thread screw. The tensioning assembly synchronously expands or retracts in the radial direction along with rotation of the double-thread screw, so that tensioning or separation between the tensioning assembly and the inner wall of the supporting cylinder is achieved, and the technical problems that in the prior art, a positioning and fastening tool is generally large in tensioning difficulty, the positioning precision cannot be considered during tensioning, and the tensioning reliability is poor are solved.

Description

Technical Field

[0001] This invention relates to the field of positioning and fastening fixtures, and in particular to a positioning and fastening tool for automated processing. Background Technology

[0002] Metal boxes require a special sealing process. The sealing steps involve placing and securing all items inside the metal box, followed by the final step of covering the box with the top panel. Then, the tabs on the side panels are clamped using appropriate tools, and the tabs are bent upwards until they fit snugly against the surface of the top panel, thus tightly pressing the top panel and the box together. (See attached image.) Figure 1 and attached Figure 2 As shown. During packaging, it is important to ensure that there is no relative movement or tilting between the upper plate and the box body during the inward bending of the folding lugs. This ensures that after the metal box is fully packaged, the axes of the several circular holes on the upper plate and the axes of the corresponding support cylinders inside the metal box remain coaxial within the allowable error range, facilitating smooth subsequent installation of the metal box.

[0003] The main problems in the packaging process are twofold: one is the processing method, and the other is the tooling for automated metal box packaging. The processing method problem mainly manifests in the following ways: In traditional manual packaging, operators typically use one hand to operate the bending tool while the other hand holds the top plate of the metal box. Using a manual round hole alignment tool, they bend the folds. To prevent the top plate from shifting or lifting during bending, affecting the packaging effect, manual operation requires not only pressing down on the top plate but also bending each fold at a small angle multiple times on opposite sides of the plate. This prevents the top plate from lifting or shifting under the greater bending force of one fold. Simultaneously, during bending, the operator must constantly check the axis between the round hole on the top plate and the support cylinder for misalignment. This results in extremely low work efficiency and inconsistent final packaging quality, thus affecting the final packaging effect. The second problem mainly stems from the low efficiency and unreliable packaging quality inherent in manual metal box packaging. The bottleneck problem necessitates the adoption of automated mechanical operations to replace manual labor. The key to automated mechanical operations is ensuring the proper positioning and fixation of the metal box's upper plate before bending the folding lugs, thus guaranteeing the quality and effectiveness of the automated process. Due to the inherent structural characteristics of metal boxes, their shapes and specifications vary, especially the angles of the side plates relative to the base plate, resulting in hundreds of different specifications. Furthermore, the outer surface of the metal box must remain smooth without any special support points. To achieve automated processing and inter-process handling of the box, corresponding tooling fixtures need to be designed. Because of the irregular shape of the metal box and the lack of effective leverage points, general-purpose tooling fixtures are unsuitable for hundreds of box types. Manufacturing specialized tooling fixtures requires a large quantity of fixtures tailored to different box specifications, leading to high production costs and a lack of sufficient space for fixture placement. This is the main reason why such metal boxes currently can only be manually sealed.

[0004] Existing technology discloses a quick-release rotor core lamination expansion clamp, utility model patent application with announcement number CN223699064U. It includes a sleeve, a truncated cone clamping block disposed within an inclined deformation cavity, a threaded rod fixedly disposed on the truncated cone clamping block, a washer and a rotating block sequentially disposed above the upper opening of the threaded rod, a spring sleeved between the upper opening and the truncated cone clamping block, a return groove extending along the length of the threaded rod, an internal threaded hole mates with the external thread in the rotating block, and an arc-shaped return surface disposed within the internal threaded hole. The central angle of each arc-shaped return surface is less than or equal to the central angle of the return groove, and the sum of the central angles of adjacent arc-shaped return surfaces is greater than the central angle of the return groove. The internal threaded hole corresponds to the return groove, and the arc-shaped return surface corresponds to the external thread, ensuring that the rotating block does not have a threaded connection with the threaded rod in the axial direction. Under the action of the spring, the truncated cone clamping block quickly resets, making it convenient to use.

[0005] The related technologies, including the above-mentioned technical solutions, still have many problems, such as: ① Generally, to achieve a fixed connection or assist in the fixed connection between two parts, various forms such as threaded connection and tensioning sleeve connection can be used. Threaded connection is mostly used for one-time fixed connection, while tensioning sleeve can achieve frequent tightening and loosening, which is more flexible. However, due to the special nature of the metal box packaging process and the requirements of automated packaging, after the upper plate is placed, mechanical automated operation, such as a robotic arm grasping the tensioning tool and inserting it into the support cylinder, is different from manual operation. The robotic arm operation requires high positioning accuracy to support the one-time insertion of the tensioning tool into the support cylinder. In order to reduce the difficulty of mechanical positioning, when designing the tensioning tool, its working section diameter should be appropriately smaller than the inner diameter of the support cylinder. In addition, due to the special processing technology of the support cylinder, its inner wall is smooth and the coefficient of friction is low. Traditional tensioning structures, at the beginning of rotating the inner core, ① Before effective contact friction is achieved, the friction between the outer cylindrical surface and the inner wall of the metal tube is insufficient, making it impossible to fix the core. This prevents relative rotation between the inner and outer cores, thus hindering tension. ② When placing the upper plate, it is impossible to strictly ensure that the circular hole on it is coaxial and collinear with the corresponding support cylinder. Therefore, the fastening tool needs to also have a positioning and adjustment function to ensure coaxiality. Traditional tensioning sleeves rely on the deformation of the wedge-shaped end of the tensioning sleeve to achieve tension and relaxation, only achieving the tensioning function and not the positioning and adjustment function. ③ The reliability of the tensioning connection needs to be improved: In the process of tensioning, traditional tensioning sleeves and similar devices gradually reduce the tensioning force along the axial direction due to the wedge deformation of the tensioning sleeve. Under extreme axial tensile force, the two tensioned parts may slide relative to each other or even loosen, which could lead to production accidents in severe cases. Therefore, there is an urgent need for a positioning and fastening tool that can achieve rapid tightening while ensuring positioning accuracy and tightening reliability, so as to help robotic arms achieve automated gripping and placement, and thus realize production line automation. Summary of the Invention

[0006] The purpose of this invention is to provide a positioning and fastening tool for automated packaging of metal boxes, which solves the technical problems of high tensioning difficulty and poor positioning accuracy and tensioning reliability that are common in existing positioning and fastening tools.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An automated machining positioning and fastening tool includes a pressure head located above an upper plate and inserted into a through hole in the upper plate. The pressure head has a through hole through which a double-ended screw extends into the inner cavity of a support cylinder. Two sets of tensioning components are installed on the reverse threads at both ends of the double-ended screw. The tensioning components move radially outward or retract synchronously with the rotation of the double-ended screw to achieve tensioning or disengagement between the tensioning components and the inner wall of the support cylinder.

[0008] Furthermore, the tensioning assembly includes an upper shaped nut, an upward head, a lower shaped nut, and a lower expansion head. The upper and lower shaped nuts are respectively threaded onto the reverse threads at both ends of the double-ended screw. The upward head is fitted onto the outside of the upper shaped nut, and the two are in a conical fit. The lower expansion head is fitted onto the outside of the lower shaped nut, and the two are in a conical fit. The inclination directions of the inner conical surfaces of the upward head and the lower expansion head are opposite.

[0009] Furthermore, the bottom of the rising head is fixedly installed relative to the upper base, the top of the lower rising head is fixedly installed relative to the lower base, and both the upper and lower bases are fitted onto the double-ended screw with the bottom of the upper base and the top of the lower base being fixedly installed relative to each other.

[0010] Furthermore, an upper bracket and a lower bracket are rotatably mounted at both ends of the double-ended screw. Several upper guide rods are installed between the upper bracket and the upper base, and several lower guide rods are installed between the lower bracket and the lower base. The upper guide rods and the lower guide rods pass through the upper and lower shaped nuts, respectively.

[0011] Furthermore, the upper guide rod is connected to the upper bracket by screws, the upper guide rod is threaded to the upper base, the lower guide rod is connected to the lower bracket by screws, and the lower guide rod is threaded to the lower base.

[0012] Furthermore, the bottom of the pressure head is provided with a ring platform, which is inserted into the through hole of the upper plate, and the ring platform is connected to the upper bracket by screws.

[0013] Furthermore, the rising head and the lower rising head are configured as a split structure, with the inner side of the rising head being a conical surface and the outer side being a cylindrical surface, and its bottom side being connected to the upper base; the inner side of the lower rising head is a conical surface and the outer side is a cylindrical surface, and its top side is connected to the lower base.

[0014] Furthermore, a main gear is coaxially fixedly mounted on the top of the double-ended screw, and a secondary gear that meshes with the main gear is rotatably mounted on the top of the pressure head. A torsion head is coaxially mounted on the secondary gear, and the torsion head is driven to rotate by an external power mechanism.

[0015] Furthermore, an attachment frame is also installed on the top of the pressure head, and a positioning block is provided on the top of the attachment frame. The positioning block is used for positioning, clamping and gripping by an external gripping mechanism.

[0016] Furthermore, the upper and lower supports are rotatably mounted to the double-ended screw via bearings.

[0017] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: (1) The present invention sets up a pressure head, a double-headed screw and two sets of tensioning components for installation and cooperation. The double-headed screw can rotate to realize the radial expansion or retraction of the tensioning components. The tensioning effect can be achieved without fixing the outer core of the tensioning mechanism in advance. At the same time, the synchronous double-headed structure is adopted to achieve higher tensioning safety without increasing the complexity of the tensioning operation. In addition, the synchronous double-headed structure works in coordination with the pressure head to achieve effective tensioning based on the positioning and fixing requirements of the upper plate and the metal box. (2) By setting two sets of tensioning components and a double-expansion head structure arranged along the axial direction, the present invention will generate a uniform reverse force in the radial direction towards the axis during the tensioning process of the inner wall of the support cylinder. This force is applied to the ring platform at the pressure head end as a corrective force. Compared with a single tensioning component, the force generated by the double-expansion head structure has two points of application along the axial direction, which makes it coaxial with the axis of the metal support cylinder, thereby ensuring the positioning and adjustment function. (3) By setting up a double-expansion head positioning fastener, the two expansion heads symmetrically generate wedge deformation along the axial direction. From the perspective of force distribution, the symmetrical wedge deformation will generate symmetrical tension force, and the tension force is greater at the outer end than at the inner end. Therefore, for the pull force along the axial direction, there will be sufficient resistance in any direction, thereby significantly reducing the possibility of being pulled out by external pull force. This tension force distribution state corresponds to the positioning and fastening requirements of the upper plate of the metal box, and can achieve a reliable fastening effect. After the upper plate is fastened, the vacuum suction cup on the robotic arm will adsorb the upper plate and transport the metal box to the next station. Since the metal box is heavy, the reliable upper plate fastening effect can ensure the safe and reliable operation of the entire metal box during the transportation process, avoiding the risk of the box falling due to the failure of fixing a certain round hole position on the upper plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the box body before the folding lugs in the prior art; Figure 2 This is a schematic diagram of the structure of the box body after the lugs are folded in the prior art; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a top view of the structure of the present invention.

[0019] In the diagram: 100, positioning fastener; 101, positioning block; 1011, auxiliary frame; 102, main gear; 103, torsion head; 104, auxiliary gear; 105, pressure head; 106, upper bracket; 107, bearing; 108, upper guide rod; 109, upper special-shaped nut; 110, expansion head; 111, upper base; 112, lower base; 113, lower guide rod; 114, lower special-shaped nut; 115, lower expansion head; 116, lower bracket; 117, double-ended screw; 200, upper plate; 300, lower plate; 400, support cylinder; 500, side plate; 501, folding lug. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of this application. The singular forms “a,” “described,” and “…” used in the embodiments of this application and the appended claims are also considered. The word "the" is also intended to include the majority form unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0022] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0023] In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" The description of the relationships between related objects indicates that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects have an "OR" relationship. The invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] To address the limitations of existing technologies, this embodiment provides a technical solution. The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] This invention primarily addresses technical problems commonly encountered in the encapsulation of metal boxes in existing technologies. For example, to prevent the upper plate 200 from shifting or warping when bending the lugs of the side plate 500, a positioning and fastening tool is needed to constrain the upper plate 200 and prevent displacement or warping. However, conventional positioning and fastening tools suffer from problems such as inability to achieve effective tension, inability to adjust for coaxiality during tensioning, and poor tensioning reliability. A typical metal box structure includes a support cylinder 400, located between the upper plate 200 and the lower plate 300, with its bottom fixedly connected to the lower plate 300 and its upper opening connected to the through hole of the upper plate 200. Here, the support cylinder 400 serves two purposes: supporting the upper plate 200 and inserting fasteners to achieve tension between the fasteners and the inner wall of the support cylinder 400, thereby positioning the upper plate 200 and facilitating subsequent gripping and displacement of the metal box by applying force to the fasteners. This invention provides a positioning and fastening tool for automated processing, effectively solving the aforementioned technical problems.

[0027] See appendix Figure 3 An automated machining positioning and fastening tool includes a pressure head 105 located above an upper plate 200 and inserted into a through hole in the upper plate 200. Specifically, the pressure head 105 has an annular platform at its bottom, which is inserted into the through hole in the upper plate 200. The fit between the pressure head 105 and the upper plate 200 ensures horizontal positioning between the pressure head 105 and the through hole in the upper plate 200. The pressure head 105 has a through hole through which a double-ended screw 117 extends into the inner cavity of a support cylinder 400. Two sets of tensioning components are installed on the reverse threads at both ends of the double-ended screw 117. The tensioning components move radially outward or retract synchronously with the rotation of the double-ended screw 117 to achieve tensioning or disengagement between the tensioning components and the inner wall of the support cylinder 400.

[0028] Specifically, the tensioning assembly includes an upper shaped nut 109, an upper head 110, a lower shaped nut 114, and a lower head 115. The upper shaped nut 109 and the lower shaped nut 114 are respectively threaded onto the reverse threads at both ends of the double-ended screw 117. The upper head 110 is fitted outside the upper shaped nut 109, and the two are in a conical fit. The lower head 115 is fitted outside the lower shaped nut 114, and the two are in a conical fit. The inner conical surfaces of the upper head 110 and the lower head 115 have opposite inclination directions. The purpose of setting the inclination directions to be opposite is that when the double-ended screw 117 rotates, the reverse threads at both ends will drive the upper head 110 and the lower head 115 to rotate in opposite directions to achieve displacement in the same or opposite directions. This allows the upper head 110 and the lower head 115 to move synchronously along the axial direction while expanding outward or contracting radially, thereby achieving synchronous tensioning or retraction. Specifically, the bottom of the rising head 110 is fixedly installed relative to the upper base 111, and the top of the lower rising head 115 is fixedly installed relative to the lower base 112. Both the upper base 111 and the lower base 112 are fitted onto the double-ended screw 117, with the bottom of the upper base 111 and the top of the lower base 112 fixedly installed relative to each other. This "fixed installation" refers to connection via screws. The upper bracket 106 and the lower bracket 116 are rotatably mounted at both ends of the double-ended screw 117. Specifically, the upper bracket 106 and the lower bracket 116 are rotatably mounted to the double-ended screw 117 via bearings 107. The upper support 106 is connected to the ring platform by screws, and several upper guide rods 108 are installed between the upper support 106 and the upper base 111. Several lower guide rods 113 are installed between the lower support 116 and the lower base 112. The upper guide rods 108 and lower guide rods 113 pass through the upper shaped nut 109 and the lower shaped nut 114, respectively. There are four upper guide rods 108 and four lower guide rods 113. The purpose is to provide guidance for the axial displacement of the rising head 110 and the lower rising head 115, thereby ensuring coaxial positioning accuracy. Specifically, the upper guide rods 108 are connected to the upper support 106 by screws, and the upper guide rods 108 are threaded to the upper base 111. The lower guide rods 113 are connected to the lower support 116 by screws, and the lower guide rods 113 are threaded to the lower base 112.Specifically, the rising head 110 and the lower rising head 115 are configured as a segmented structure. The inner side of the rising head 110 is a conical surface and the outer side is a cylindrical surface, and its bottom side is connected to the upper base 111. The inner side of the lower rising head 115 is a conical surface and the outer side is a cylindrical surface, and its top side is connected to the lower base 112. This can be understood as the segmented structure of the rising head 110 and the lower rising head 115 referring to several structurally identical segmented components arranged in a central array along the axis of the double-ended screw 117. The bottom of the segmented component of the rising head 110... All are fixedly installed relative to the upper base 111, with the top being the free end. The top of the split-type components of the lower expansion head 115 are fixedly installed relative to the lower base 112, with the bottom being the free end. When the double-headed screw 117 rotates, the upper shaped nut 109 and the lower shaped nut 114 move towards each other. Through the conical surface engagement, the free ends of the upper expansion head 110 and the lower expansion head 115 are subjected to force and expand radially outward, thereby pressing the free ends of the upper expansion head 110 and the lower expansion head 115 against the inner wall of the support cylinder 400 to achieve the tensioning action.

[0029] Understandably, once the upper plate 200 of the metal box is placed, the robotic arm grasps the first positioning fastener 100 and inserts it into the corresponding support cylinder 400. The robotic arm's working head drives the twisting head 103 to rotate, achieving simultaneous tensioning of the positioning fastener 100's two expansion heads against the inner wall of the support cylinder 400. Based on the force relationship, during the tensioning process of the two expansion heads, the pressure head 105 of the positioning fastener 100 will cause the circular hole of the upper plate 200 to become coaxial with the support cylinder 400. As the two expansion heads reach the designed pressure against the inner wall of the support cylinder 400, under the action of friction, the pressure head 105 on the positioning fastener 100 fixes the upper plate 200 along the axial direction, thereby achieving the upper plate 200's tensioning. The first positioning fastener 100 serves to position and fix the upper plate 200. Then, the robotic arm grasps the second positioning fastener 100 and inserts it into the corresponding support cylinder 400. Due to the constraint of the first positioning fastener 100 on the upper plate 200, the deviation of the second circular hole of the upper plate 200 from the axis of its corresponding support cylinder 400 is mainly an arc deviation relative to the axis of the first fastener. Therefore, during the tightening process of the second fastener, the positioning structure of its pressure head 105 forces the upper plate 200 to make slight adjustments along the arc direction with the position of the first positioning fastener 100 as the center, thereby making the axis of the second circular hole coaxial and collinear with the axis of the support cylinder 400, and completing the fixation of the upper plate 200. After the second positioning fastener completes its operation, according to the principle of two-point positioning on a plane, the remaining circular holes of the upper plate 200 are all coaxial with their respective support cylinders 400. The robotic arm then sequentially grasps the remaining positioning fasteners 100 and inserts them into the remaining support cylinders 400, thus fixing the positions of all the circular holes of the upper plate 200. After all the folds 501 of the metal box are bent and moved to the next process position, the robotic arm rotates the toggle head 103 in reverse order to disassemble the positioning fastener 100, and the metal box is encapsulated.

[0030] See appendix Figure 4 The main gear 102 is coaxially fixedly mounted on the top of the double-ended screw 117. A secondary gear 104, meshing with the main gear 102, is rotatably mounted on the top of the pressure head 105. A torsion head 103 is coaxially mounted on the secondary gear 104 and is driven to rotate by an external power mechanism. Additionally, a subframe 1011 is mounted on the top of the pressure head 105. A positioning block 101 is provided on the top of the subframe 1011 for positioning, clamping, and gripping by an external gripping mechanism.

[0031] When the positioning and fastening tool for automated processing disclosed in this invention is working, external power is applied to the torsion head 103, which in turn drives the secondary gear 104 to rotate synchronously. At the same time, the main gear 102 rotates synchronously, and the double-ended screw 117 rotates synchronously with the main gear 102. The double-ended screw 117 drives the upper shaped nut 109 and the lower shaped nut 114 to move synchronously in opposite directions, thereby driving the two expansion heads to tighten or retract synchronously.

[0032] In addition, when assembling the positioning and fastening tool of the present invention, the lower shaped nut 114 is first installed onto the thread at the lower end of the double-ended screw 117 from below. After rotating the lower shaped nut 114 to a suitable position on the double-ended screw 117, it is kept stationary. Then, the lower expansion head 115 and the lower base 112 are sequentially passed through the double-ended screw 117 from above. The inner conical surface of the lower expansion head 115 and the outer conical surface of the lower shaped nut 114 are brought into close contact. Then, the four lower guide rods 113 are passed through the through holes of the lower shaped nut 114 from bottom to top, and the orientation of the threaded holes of the lower base 112 is adjusted circumferentially so that each lower guide rod 113 is aligned with the four threaded holes at the lower end of the lower base 112, completing the threaded fastening assembly; then, the lower bracket 116 is passed under the double-ended screw 117 and fastened to the lower guide rods 113 in sequence with screws, and the lower expansion head 115 is adjusted circumferentially so that its threaded holes are aligned with the through holes at the lower end of the lower base 112, and then... The screws secure the lower expansion head 115 to the lower end of the lower base 112, completing the assembly of the lower structure of the positioning fastener 100. Then, the upper base 111 and the expansion head 110 are sequentially passed from top to bottom through the double-ended screw 117 and placed in position. The upper shaped nut 109 is screwed in from above the double-ended screw 117 until its outer conical surface aligns with the inner conical surface of the expansion head 110, and held in place. The four upper guide rods 108 are then passed from top to bottom through the four through holes of the upper shaped nut 109, and circumferentially adjusted. The threaded holes of the upper base 111 are aligned so that each upper guide rod 108 is aligned with the four threaded holes at the upper end of the upper base 111, completing the threaded fastening assembly; bolts are passed through the circular through holes of the upper base 111 and the arc-shaped through holes of the lower base 112, respectively, to achieve the bolted fastening connection between the upper base 111 and the lower base 112; the rising head 110 is circumferentially adjusted so that the threaded holes on its tail end are aligned with the through holes at the upper end of the upper base 111, and the rising head 110 is fastened to the upper base 111 with screws. To achieve a secure connection, the upper bracket 106 is passed through the double-ended screw 117 from above and then secured to the upper guide rod 108 with screws. The pressure head 105 is passed through the double-ended screw 117 from above and placed on the upper bracket 106. The pressure head 105 is then threadedly secured to the upper bracket 106 with screws from bottom to top. The main gear 102 and the auxiliary gear 104 at the upper end of the screw are then installed in sequence, and the two are meshed together. The auxiliary gear 104 and the torsion head 103 on it are integrally formed.

[0033] Once the positioning fastener 100 is assembled as a whole, its displacement can be achieved by using a robotic arm to clamp the attachment 1011. It is important to understand that the packaging process involves multiple stations and steps; the positioning fastener 100 of this application simplifies and facilitates the handling of the packaging box and the packaging box itself. After the positioning fastener 100 is assembled, it does not require repeated assembly during use. As a whole, it can be moved simply by using a robotic arm to clamp the attachment 1011. During the tensioning process, only external torque needs to be input. The specific usage process is as follows: Here, the auxiliary gear 104 meshes with the main gear 102. The torque required by the positioning fastener 100 is input through the auxiliary gear 104. The auxiliary gear 104 is offset from the axis of the entire positioning fastener 100, forming an eccentric structure. When the torque of the robotic arm is input through the auxiliary gear 104, under the action of the eccentric torque, the circumferential surfaces of the rising head 110 and the lower rising head 115 are constrained by the inner wall of the support cylinder and cannot rotate. Thus, the double-headed screw 117 can rotate under the drive of the main gear 102, driving the upper shaped nut 109 and the lower shaped nut 114 on it to translate along the axis, realizing the tensioning and retraction functions.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A positioning and fastening tool for automated processing, characterized in that, The device includes a pressure head located above the upper plate and inserted into a through hole in the upper plate. The pressure head has a through hole through which a double-ended screw extends into the inner cavity of the support cylinder. Two sets of tensioning components are installed on the reverse threads at both ends of the double-ended screw. The tensioning components move radially outward or backward synchronously with the rotation of the double-ended screw to achieve tensioning or disengagement between the tensioning components and the inner wall of the support cylinder.

2. The positioning and fastening tool for automated processing according to claim 1, characterized in that, The tensioning assembly includes an upper shaped nut, an ascending head, a lower shaped nut, and a lower expanding head. The upper and lower shaped nuts are respectively threaded onto the reverse threads at both ends of the double-ended screw. The ascending head is fitted onto the outside of the upper shaped nut, and the two are in a conical fit. The lower expanding head is fitted onto the outside of the lower shaped nut, and the two are in a conical fit. The inclination directions of the inner conical surfaces of the ascending head and the lower expanding head are opposite.

3. The positioning and fastening tool for automated processing according to claim 2, characterized in that, The bottom of the rising head is fixedly installed relative to the upper base, and the top of the lower rising head is fixedly installed relative to the lower base. The upper base and the lower base are both slidably mounted on the double-ended screw, with the bottom of the upper base and the top of the lower base being fixedly installed relative to each other.

4. The positioning and fastening tool for automated processing according to claim 3, characterized in that, The upper and lower supports are rotatably mounted on both ends of the double-ended screw. Several upper guide rods are installed between the upper support and the upper base, and several lower guide rods are installed between the lower support and the lower base. The upper and lower guide rods pass through the upper and lower shaped nuts, respectively.

5. A positioning and fastening tool for automated processing according to claim 4, characterized in that, The upper guide rod is connected to the upper bracket by screws, and the upper guide rod is threaded to the upper base. The lower guide rod is connected to the lower bracket by screws, and the lower guide rod is threaded to the lower base.

6. The positioning and fastening tool for automated processing according to claim 5, characterized in that, The bottom of the pressure head is provided with a ring platform, which is inserted into the through hole of the upper plate, and the ring platform is connected to the upper bracket by screws.

7. A positioning and fastening tool for automated processing according to claim 6, characterized in that, The rising head and the lower rising head are configured as a split structure. The inner side of the rising head is a conical surface and the outer side is a cylindrical surface, and its bottom side is connected to the upper base. The inner side of the lower rising head is a conical surface and the outer side is a cylindrical surface, and its top side is connected to the lower base.

8. A positioning and fastening tool for automated processing according to claim 7, characterized in that, The main gear is coaxially fixedly mounted on the top of the double-ended screw, and the auxiliary gear, which meshes with the main gear, is rotatably mounted on the top of the pressure head. The torsion head is coaxially mounted on the auxiliary gear and is driven to rotate by an external power mechanism.

9. A positioning and fastening tool for automated processing according to claim 8, characterized in that, The top of the pressure head is also equipped with a bracket, and the top of the bracket is provided with a positioning block, which is used for positioning, clamping and gripping by an external gripping mechanism.

10. A positioning and fastening tool for automated processing according to claim 8, characterized in that, The upper and lower supports are rotatably mounted to the double-ended screw via bearings.

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