A sheet part punching, tapping and indexing device
By designing a rotary indexing mechanism and a high-precision rotary bearing for drilling and tapping thin sheet parts, the problem of low yield of drilling thin sheet structure parts was solved, achieving efficient and precise hole processing, and reducing scrap rate and processing cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI WEIHE TOOLS CO LTD
- Filing Date
- 2025-09-02
- Publication Date
- 2026-06-12
AI Technical Summary
Existing technologies are inefficient when processing holes with a diameter of less than 3mm, and thin-sheet parts are difficult to fix, resulting in hole misalignment or surface scratches, and low yield. In particular, the scrap rate is high when the appearance requirements of mechanical products are strict.
A drilling and tapping indexing device for thin sheet parts was designed, including a rotary indexing mechanism. Through a fixed base, a rotating base, a handwheel drive mechanism, and a nut clamping mechanism, the device achieves synchronous rotation and high-precision positioning of the thin sheet parts. High-precision rotary bearings and scale lines are used to ensure indexing accuracy and stability.
It improves the yield of holes in thin sheet parts, reduces the scrap rate from 30% to 2%, and enables hole processing to be completed directly on the indexing device, saving process time, improving processing efficiency and accuracy, and is suitable for batch processing of various structural parts.
Smart Images
Figure CN224347072U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of workpiece clamping fixtures for drilling machines used in operation and transportation, and specifically relates to an indexing device for drilling and tapping thin sheet parts. Background Technology
[0002] The connections in mechanical products rely heavily on various threaded holes and through holes. Holes larger than 3mm in diameter are typically machined directly by a machining center. However, holes smaller than 3mm require two steps: first, the machining center marks the hole, and then a fitter drills and taps it. This process is inefficient, time-consuming, and, for thin-sheet parts (diameter-to-thickness ratio greater than 10), the fitter's manual drilling and tapping is particularly prone to misalignment or scratching the part's surface, resulting in a low yield rate. This is especially problematic given the increasingly stringent appearance requirements for modern mechanical products, which necessitate avoiding surface damage from drilling to prevent increased scrap rates. Therefore, the following improved technical solutions are proposed. Utility Model Content
[0003] The technical problem solved by this utility model is to provide a drilling and tapping indexing device for thin sheet parts, thereby solving the technical problem of low yield of drilling thin sheet structure parts.
[0004] The technical solution adopted by this utility model is as follows: A thin sheet part drilling and tapping indexing device, including a rotary indexing mechanism, the rotary indexing mechanism including a fixed base concentrically connected to a drilling machine, the rotary indexing mechanism also including a rotary base, the rotary base rotating concentrically relative to the fixed base, and the rotary base being driven to rotate by a handwheel drive mechanism installed on the vertical side, the handwheel drive mechanism driving the rotary base to rotate through a right angle bevel gear transmission, the rotary base being concentrically connected to a nut clamping mechanism and driving the nut clamping mechanism to rotate concentrically, the nut clamping mechanism including a support frame, the support frame being concentrically clamped and fixedly installed with a nut and a spring washer to achieve synchronous rotation of the thin sheet part.
[0005] Furthermore, the fixed base is an inverted T-shaped structure, and the rotation of the rotating base is achieved by a high-precision rotating bearing between the vertical part at the top center of the fixed base and the rotating base.
[0006] Furthermore: The upper horizontal surface of the inverted T-shaped structure of the fixed base is marked with several scale lines I according to the angle requirements. The scale lines I are based on the commonly used angle division requirements, and the division angles are within the range of less than 90°, including 10°, 22.5°, 30°, 40°, 45°, 50°, 60°, 67.5°, 70°, 80°, and 90°.
[0007] Furthermore: the rotating base and the support frame are concentrically fixed together by screw I; the outer cylindrical surface of the rotating base is provided with scale line II, and the bottom outer cylindrical surface of the support frame is provided with scale line III, with scale line II coinciding with scale line III; a vertically upward transmission spindle is provided at the center of the top of the rotating base, and the transmission spindle serves as the power input for the rotation of the rotating base.
[0008] Furthermore: the support frame has a notch I on its side, which is used to install a handwheel drive mechanism. The handwheel drive mechanism has a bearing seat, and the bottom of the bearing seat is fixed to the outside of the rotating base by screw II. The handwheel shaft is mounted in the bearing seat by a bearing for rotatable support. The power input end of the handwheel shaft is equipped with a handwheel, and the power output end of the handwheel shaft is coaxially fixed to bevel gear I by a flat key. Bevel gear I transmits power vertically and meshes with bevel gear II. Bevel gear II is concentrically fixed to the transmission spindle of the rotating base by a cylindrical pin. Rotating the handwheel causes the rotating base to rotate.
[0009] Furthermore: the inner diameter of the bearing housing The tip circle diameter of bevel gear I satisfy
[0010] Furthermore: the top of the support frame has an annular groove and a central stud, with the central stud concentrically located at the center of the annular groove; the bottom of the central stud has a D-shaped hole; the bottom of the annular groove has a long strip-shaped segmented bracket I and a segmented bracket II, the segmented bracket II passing through the D-shaped hole and intersecting the segmented bracket I in a cross shape and being coplanar; the upper surface of the segmented bracket I has several notches II at certain intervals, and the upper surface of the segmented bracket II has several notches III at certain intervals; the notches II and III are used for positioning and fitting several concentric annular segmented sleeves, the center of which coincides with the rotation center of the support frame; the segmented sleeves are arranged in multiple layers according to the size of the drilling machine table, and thin sheet parts are concentrically pressed and fixed onto the segmented sleeves by spring washers and nuts, the dimensions of each layer of segmented sleeves are... and Based on the center distance of the threaded holes to be machined on the thin sheet part Threaded hole diameter Large outer diameter Set and ensure the center distance of the threaded holes on the thin sheet parts. Located in the gap between the two separator sleeves, the diameter of the threaded hole It is smaller than the gap between two adjacent separator sleeves to avoid damaging the separator sleeves when drilling and tapping.
[0011] Preferably, the outer diameter of the thin sheet part is: The thickness is h1, and its diameter is... Several diameters to be processed are evenly distributed on the surface. Threaded holes.
[0012] Advantages of this utility model compared to the prior art:
[0013] 1. This utility model is applicable to thin sheet parts with a thickness h1 of 0.7mm. The hole diameter is 1.6mm. When punching holes by hand, the efficiency is low and the scrap rate is as high as 30%. After using the indexing device of this utility model, the scrap rate is reduced to 2%. Moreover, the entire hole processing can be completed directly on the indexing device, and the positioning accuracy is guaranteed. It does not require two processes: machining the center point and punching by hand. This can save the turnaround time between processes and reduce the processing cost.
[0014] 2. The support frame and rotating base of this utility model need to be processed together. During the processing, the scale lines III and II on the support frame and rotating base should be processed in one go. When installing screw I, it is necessary to ensure that the scale lines III and II on the support frame and rotating base coincide, so as to ensure the indexing accuracy requirements of the indexing device. The indexing device of this utility model can not only be used for thin sheet parts, but also for other structural parts. In batch processing, it is more efficient and has a higher pass rate than hand-held part drilling. Moreover, it does not require the machining of center point holes, saving turnaround time.
[0015] 3. The fixed base of this utility model has an inverted T-shaped structure and a high-precision rotating bearing, which enhances structural stability, facilitates installation and positioning, optimizes spatial layout, makes the device more compact and efficient, can achieve high-precision rotation, reduces frictional resistance, extends the service life of the device, and has anti-vibration performance, ensuring the stability and safety of the processing.
[0016] 4. The design of the scale line I on the horizontal surface of the inverted T-shaped structure of the fixed base of this utility model improves the indexing accuracy and efficiency, meets diverse processing needs, enhances the convenience and reliability of operation, is intuitive and easy to read, reduces human error, optimizes the device structure, facilitates standardized production, is easy to maintain and repair, and ensures consistent and reliable processing quality.
[0017] 5. The handwheel drive mechanism, rotating base, support frame, and thin sheet parts are precisely matched and connected to form a cohesive system. The entire device can maintain a high degree of synchronization and stability during processing. Turning the handwheel can make the rotating base drive the thin sheet parts to rotate synchronously, so that the thin sheet parts can maintain a consistent posture and position during processing, improving processing accuracy and efficiency. Because the entire device has a compact structure, high transmission efficiency, precise control, and stable and reliable operation, it is very suitable for precision operations such as drilling and tapping of thin sheet parts.
[0018] 6. The design of the support frame and related components of this utility model, through the ingenious combination of the annular groove, central stud, dividing brackets I and II, D-shaped hole, dividing sleeve and other structures, achieves high-precision positioning, stable clamping and efficient processing of thin sheet parts. The structure is compact and easy to maintain. Attached Figure Description
[0019] Figure 1 The front view of the device of this utility model without the handwheel;
[0020] Figure 2 for Figure 1 Including the BB cross-sectional view of the handwheel;
[0021] Figure 3 for Figure 2 A magnified close-up of the top section;
[0022] Figure 4 This is a top view of the device of this utility model;
[0023] Figure 5 This is a schematic diagram showing the graduation angle of the fixed base of this utility model within the range of less than 90°.
[0024] Figure 6 for Figure 2 Top view of the mid-section support;
[0025] Figure 7 This is a process flow diagram of the usage method of the device of this utility model;
[0026] In the diagram: 1-Fixed base, 1a-Scale line I, 2-High-precision rotating bearing, 3-Rotating base, 3a-Scale line II, 4-Screw I, 5-Support bracket, 5a-Scale line III, 5b-Notch I, 5c-D-type hole, 6-Bevel gear II, 7-Cylindrical pin, 8-Divider bracket I, 8a-Notch II, 9-Divider sleeve, 10-Thin sheet part, 10a-Threaded hole, 11-Spring washer, 12-Nut, 13-Handwheel shaft, 14-Bearing seat, 15-Bearing, 16-Bevel gear I, 17-Flat key, 18-Screw II, 19-Divider bracket II, 19a-Notch III. Detailed Implementation
[0027] The following will refer to the appendix in the embodiments of this utility model. Figure 1-7 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0028] A drilling and tapping indexing device for thin sheet parts, (e.g.) Figure 1 , Figure 2 The system includes a rotary indexing mechanism, which includes a fixed base 1 concentrically connected to the drilling machine and a rotary base 3. The rotary base 3 rotates concentrically relative to the fixed base 1 and is driven to rotate by a handwheel drive mechanism mounted on the vertical side. The handwheel drive mechanism drives the rotary base 3 to rotate via a right-angle bevel gear transmission. The rotary base 3 is concentrically connected to a nut clamping mechanism and drives the nut clamping mechanism to rotate concentrically. The nut clamping mechanism includes a support frame 5. The support frame 5 is used to concentrically clamp and fix the thin sheet part 10 to achieve synchronous rotation of the thin sheet part 10 through a nut 12 and a spring washer 11.
[0029] Among them: (e.g.) Figure 2 The rotary indexing mechanism consists of a fixed base 1, scale line I1a, a high-precision rotary bearing 2, a rotating base 3, and scale line II3a. The handwheel drive mechanism consists of a handwheel shaft 13, a bearing seat 14, a bearing 15, a bevel gear I 16, a flat key 17, a screw II 18, a cylindrical pin 7, and a bevel gear II 6. The nut tightening mechanism consists of a support frame 5, scale line III 5a, a screw I 4, a dividing bracket I 8, a dividing sleeve 9, a spring washer 11, a nut 12, and a dividing bracket II 19.
[0030] It should be noted that the rotating base 3 and the fixed base 1 are concentrically designed, ensuring high-precision positioning during rotation. The rotating base 3 rotates smoothly through a handwheel drive mechanism and right-angle bevel gear transmission. This transmission method features high transmission efficiency and a stable transmission ratio, further ensuring the accuracy of indexing rotation. The nut clamping mechanism, through the coordinated action of the support frame 5, nut 12, and spring washer 11, achieves stable clamping of the thin sheet part 10. This clamping method not only ensures the stability of the part during processing but also avoids deformation or loosening of the part due to excessive or insufficient clamping force. During rotation, the rotating base 3 drives the nut clamping mechanism and the thin sheet part 10 to rotate synchronously. This synchronous rotation function ensures that the part maintains a consistent posture and position during processing, improving processing accuracy and efficiency. The device has a compact overall structure, a reasonable layout of components, and occupies little space, facilitating efficient processing operations within a limited processing space. The handwheel drive mechanism design allows the operator to easily control the rotation angle and speed of the rotating base 3. Meanwhile, the adjustment of the nut clamping mechanism is relatively simple, allowing operators to quickly adjust it according to part size and processing requirements. Through high-precision indexing rotation and stable clamping with synchronous rotation, this device significantly improves the drilling and tapping accuracy of thin sheet parts. This helps reduce scrap rates and improve product quality. Because the device enables rapid and accurate indexing rotation and clamping operations, it greatly shortens processing time and improves processing efficiency, which is particularly important for companies that mass-produce thin sheet parts.
[0031] Furthermore, the fixed base 1 is an inverted T-shaped structure, and the rotation of the rotating base 3 is achieved by the rotation support of the vertical part at the top center of the fixed base 1 and the rotating base 3 through the high-precision rotating bearing 2.
[0032] In use: Because there is a high-precision rotating bearing 2 between the fixed base 1 and the rotating base 3, the coaxiality of the indexing device is guaranteed, thus improving the indexing accuracy.
[0033] It should be noted that the inverted T-shaped structure provides a larger support area for the fixed base 1 in the horizontal direction, thereby improving the stability of the entire device during processing. The vertically oriented top center of the inverted T-shaped structure provides a clear installation and positioning reference for the rotating base 3, which helps simplify the installation process, improve installation efficiency, and ensure the concentricity between the rotating base 3 and the fixed base 1. The inverted T-shaped structure results in a smaller vertical space occupied by the fixed base 1 and a larger horizontal support area. This design helps optimize the overall spatial layout of the device, making it more compact and efficient. The high-precision rotary bearing 2 has extremely high rotational accuracy and stability, ensuring that the rotating base 3 maintains a precise posture and position during rotation. This helps reduce rotational errors caused by bearing clearance or wear, improving processing accuracy. The high-precision rotary bearing 2 uses high-quality materials and advanced manufacturing processes, resulting in low frictional resistance. This helps reduce energy loss during the rotation of the rotating base 3, improving the operating efficiency of the device. The high-precision rotary bearing 2 has high load-bearing capacity and wear resistance, maintaining stable performance during long-term use, which helps extend the service life of the device. The high-precision rotary bearing 2 is designed and manufactured with vibration resistance in mind, which can effectively reduce the damage to the device caused by vibration during processing, thus helping to ensure the stability and safety of the processing.
[0034] Furthermore: (e.g.) Figure 5 The upper horizontal surface of the inverted T-shaped structure of the fixed base 1 is marked with several scale lines I1a according to the angle requirements. The scale lines I1a are based on the commonly used angle division requirements, and the division angles are 10°, 22.5°, 30°, 40°, 45°, 50°, 60°, 67.5°, 70°, 80° and 90° within the range of less than 90°.
[0035] It should be noted that the setting of scale line I1a provides the operator with a clear indexing reference, enabling the rotating base 3 to rotate precisely at a predetermined angle. The operator can directly and quickly locate the required angle based on scale line I1a without complex calculations or adjustments, thus improving indexing efficiency. Scale line I1a covers a variety of commonly used angles, such as 10°, 22.5°, 30°, and 45°, which are very common in drilling and tapping thin sheet parts. Therefore, this design can meet diverse processing needs. In addition to commonly used angles, scale line I1a also provides other angle options, allowing the operator to flexibly adjust according to specific processing requirements. Scale line I1a is directly engraved on the upper horizontal surface of the fixed base 1, making it intuitive and easy to read, facilitating operator use. Indexing through clear scale lines reduces indexing errors caused by human judgment or improper operation, improving processing reliability. The design of scale line I1a helps to achieve standardized production of the device, reduce manufacturing costs, and improve production efficiency. The presence of graduation line I1a makes the maintenance and repair of the device more convenient, allowing operators to quickly locate the problem and make corresponding adjustments or repairs. Precise indexing and positioning ensure the machining quality of thin-sheet parts during drilling and tapping, reducing the scrap rate. The use of graduation line I1a ensures consistency with each indexing, thereby improving machining consistency and contributing to improved overall product quality.
[0036] Furthermore: the rotating base 3 and the support frame 5 are concentrically fixed together by screw I4; the outer cylindrical surface of the rotating base 3 is provided with scale line II3a, and the bottom outer cylindrical surface of the support frame 5 is provided with scale line III5a, the scale line II3a and the scale line III5a coincide; the top center of the rotating base 3 is provided with a vertically upward transmission spindle, the transmission spindle serves as the power input for the rotation of the rotating base 3.
[0037] During processing, the support frame 5 and the rotating base 3 need to be processed together so that the scale line II 3a and the scale line III 5a on them are processed in one go; when installing screw I 4, it is necessary to ensure that the scale lines II and III on the support frame 5 and the rotating base 3 coincide, so as to ensure the indexing accuracy of the indexing device.
[0038] It should be noted that the rotating base 3 and the support frame 5 are concentrically fixed together by screw I4. This design ensures concentricity during rotation. Concentricity is fundamental to ensuring indexing accuracy, reducing vibration and errors caused by eccentricity, thereby improving machining precision. The outer cylindrical surface of the rotating base 3 has a scale line II3a, and the bottom outer cylindrical surface of the support frame 5 has a scale line III5a, with scale line II3a coinciding with scale line III5a. This design not only facilitates alignment during installation but also serves as a visual reference for verifying concentricity after installation. During machining, the support frame 5 and the rotating base 3 must be machined together so that scale line II3a and scale line III5a are machined in one operation. This combined machining method ensures the accuracy and consistency of the scale lines, avoiding errors that may occur during individual machining. When installing screw I4, it is necessary to ensure that scale lines II and III on the support frame 5 and the rotating base 3 coincide. This step is crucial for ensuring the indexing accuracy of the indexing device. The coincidence of the scale lines allows for a visual assessment of whether the installation is in place, enabling timely adjustments. A vertically upward-pointing drive spindle is centrally located at the top of the rotating base 3, serving as the power input for its rotation. This design makes power transmission more direct and efficient, reducing energy loss and transmission errors. The vertically upward-pointing design of the drive spindle makes the overall structure of the device more compact and space-saving. As a power input component, the drive spindle's design makes maintenance and repair more convenient. Operators can easily access the drive spindle for lubrication, replacement of worn parts, etc., thereby extending the device's service life. The concentric connection, the coincidence of scale lines II and III, and the efficient transmission of the drive spindle work together to reduce the accumulation of errors during the indexing process. This enables the indexing device to achieve high-precision indexing operations, meeting the processing requirements for drilling and tapping thin sheet parts. The above design makes the overall structure of the device more stable, maintaining a consistent posture and position during processing. This helps reduce indexing errors caused by vibration or external forces, improving processing stability. The coincidence of scale lines II and III and the efficient transmission of the drive spindle allow operators to quickly locate the required angle and perform processing operations, shortening processing time and improving processing efficiency.
[0039] Furthermore: the support frame 5 has a notch I5b on its side, which is used to install a handwheel drive mechanism. The handwheel drive mechanism has a bearing seat 14. The bottom of the bearing seat 14 is fixed to the outside of the rotating base 3 by screw II18. The handwheel shaft 13 is rotatably supported and installed in the bearing seat 14 by bearing 15. The power input end of the handwheel shaft 13 is provided with a handwheel. The power output end of the handwheel shaft 13 is coaxially fixed to a bevel gear I16 by a flat key 17. The bevel gear I16 vertically drives and meshes with the bevel gear II6. The bevel gear II6 is concentrically fixed to the transmission spindle of the rotating base 3 by a cylindrical pin 7. Rotating the handwheel causes the rotating base 3 to rotate.
[0040] In use: Since bevel gear I16 is mounted on handwheel shaft 13 via flat key 17, rotating handwheel shaft 13 drives bevel gear I16 and bevel gear II6 to mesh. Since bevel gear II6 is connected to rotating base 3 via cylindrical pin 7, rotating handwheel can make rotating base 3 rotate. Support frame 5 is fixed to rotating base 3 via screw I4. Thin sheet part 10 is fixed to support frame 5 via spring washer 11 and nut 12. Therefore, rotating base 3 will drive thin sheet part 10 to rotate at the same time.
[0041] It should be noted that the support frame 5 has a notch Ⅰ5b on its side for mounting the handwheel drive mechanism. This design makes the entire device structure more compact and reduces space occupation. The bottom of the bearing seat 14 is fixed to the outside of the rotating base 3 by screw Ⅱ18, ensuring a stable connection between the handwheel drive mechanism and the rotating base 3. The handwheel shaft 13 is rotatably supported in the bearing seat 14 by bearing 15, achieving smooth and efficient rotational movement. The vertical transmission design of bevel gear Ⅰ16 and bevel gear Ⅱ6 makes power transmission more direct and efficient, reducing energy loss. The power input end of the handwheel shaft 13 is equipped with a handwheel, which allows the operator to precisely control the rotation angle and speed of the rotating base 3 by turning the handwheel. The use of the flat key 17 ensures the coaxial connection between bevel gear Ⅰ16 and handwheel shaft 13, improving the accuracy and stability of transmission. Bevel gear Ⅱ6 is concentrically fixed to the transmission spindle of the rotating base 3 by cylindrical pin 7. This design allows the rotating base 3 to maintain a stable posture and position during rotation. The support frame 5 is fixed to the rotating base 3 by screw I4, further enhancing the stability of the entire device and ensuring the smoothness of the sheet part 10 during rotation. The connection methods between the various components are simple and clear, such as screw fastening and key connection, making the installation process more convenient and faster. The design of notch I5b makes the installation of the handwheel drive mechanism easier, reducing installation difficulty and time. The design of key components such as bearing seat 14 and handwheel shaft 13 makes maintenance and repair more convenient, allowing operators to easily access these components for lubrication, replacement of worn parts, and other operations. The use of a bevel gear transmission system reduces the length and complexity of the transmission chain, lowers the probability of failure, and improves the reliability of the device. In summary, the handwheel drive mechanism, rotating base 3, support frame 5, and sheet part 10 form a cohesive system through precise cooperation and connection. This design enables the entire device to maintain a high degree of synchronization and stability during processing. Turning the handwheel causes the rotating base 3 to drive the sheet part 10 to rotate synchronously. This design ensures that the sheet part maintains a consistent posture and position during processing, improving processing accuracy and efficiency. Because the entire device is compact, has high-efficiency transmission, precise control, and is stable and reliable, it is very suitable for precision operations such as drilling and tapping of thin sheet parts.
[0042] Furthermore: (e.g.) Figure 3 The inner diameter of the bearing housing 14 The tooth tip circle diameter of bevel gear I16 satisfy
[0043] During installation, bevel gear I16 needs to be mounted on handwheel shaft 13 via flat key 17. First, install bearing seat 14, then install handwheel shaft 13 with bevel gear I16, and make bevel gear 16 mesh with bevel gear 6.
[0044] Furthermore: (e.g.) Figure 3 , Figure 4 , Figure 6 The support frame 5 has an annular groove and a central stud at its top, with the central stud concentrically located at the center of the annular groove. A D-shaped hole 5c is formed at the bottom of the central stud. The bottom of the annular groove is provided with elongated segmented brackets I 8 and II 19. Segmented bracket II 19 passes through the D-shaped hole 5c and intersects with segmented bracket I 8 in a cross shape, being concentric and coplanar. Segmented brackets I 8 and II 19 are arranged as follows: Figure 6 Assemble as shown, ensuring that after the dividing bracket II19 passes through the through-hole D-shaped hole 5c, the center of the dividing sleeve 9 after installation coincides with the rotation center of the support frame 5. The upper surface of the dividing bracket I8 has several notches II8a spaced at intervals, and the upper surface of the dividing bracket II19 has several notches III19a spaced at intervals. These notches II8a and III19a are used to position and fit several concentric, annular dividing sleeves 9, ensuring that the centers of these dividing sleeves 9 coincide with the rotation center of the support frame 5. The dividing sleeves 9 are arranged in multiple layers according to the size of the drilling machine table. Thin sheet parts 10 are concentrically pressed and fixed onto the dividing sleeves 9 by spring washers 11 and nuts 12. The dimensions of each layer of dividing sleeve 9... and According to the center distance dimension of the threaded hole 10a to be machined in the thin sheet part 10 Threaded hole 10a diameter Large outer diameter Set and ensure the center distance dimension of the threaded hole 10a on the thin sheet part 10. Located in the gap between the two partition sleeves 9, the diameter of the threaded hole 10a is... The distance is smaller than the gap between two adjacent partition sleeves 9, so as to avoid damaging the partition sleeves 9 when drilling and tapping.
[0045] Preferably, the outer diameter of the thin sheet part 10 is [missing information]. The thickness is h1, and its diameter is... Several diameters to be processed are evenly distributed on the surface. Threaded hole 10a.
[0046] It should be noted that the support frame 5 has an annular countersunk groove and a concentrically arranged central stud at its top. This design not only enhances the structural strength of the support frame 5 but also provides a precise reference for the subsequent installation of the partition sleeve. The central stud ensures that the partition sleeve can be installed concentrically and stably on the support frame 5, guaranteeing the precise position of the sheet part during processing. The partition bracket II 19 passes through the through D-shaped hole 5c on the support frame 5, ensuring that the center of the partition sleeve 9 and the rotation center of the support frame 5 are basically coincident, further improving positioning accuracy. The design of the partition sleeve 9, along with notches II 8a and III 19a, ensures the precise position and stable clamping of the sheet part during processing. The multi-layered arrangement of the partition sleeve 9 not only improves the versatility of the support frame 5 but also provides stable support for the sheet part during processing, reducing processing errors caused by vibration or deformation. Through precise positioning and stable clamping, this design allows the sheet part to maintain a consistent posture and position during processing, reducing time wasted on adjustments or repositioning. The concentric and annular structure of the partition sleeve 9 allows the drilling machine to process multiple threaded holes simultaneously, improving processing efficiency. The design of the support frame 5 and its related components makes the entire device compact and space-saving, facilitating efficient processing operations within limited processing space. The design of components such as the partition bracket I 8, partition bracket II 19, and partition sleeve 9 makes maintenance and repair more convenient. Operators can easily access these components for replacement or adjustment, extending the device's service life. The cross-shaped intersecting structure and D-shaped hole 5c design of the partition bracket I 8 and partition bracket II 19 allow the support frame 5 to flexibly adapt to thin sheet parts of different sizes and shapes, improving the device's versatility. The multi-layered design and adjustable dimensions of the partition sleeve 9 make the device suitable for processing various specifications of thin sheet parts, meeting diverse processing needs.
[0047] This utility model relates to an assembly and usage method of a drilling and tapping indexing device for thin sheet parts. The use of the device includes an assembly method and a usage method, wherein the assembly method includes an assembly method for a handwheel drive mechanism.
[0048] The assembly method of the handwheel drive mechanism includes the following steps: first, the bevel gear I16 is concentrically fixed to the power output end of the handwheel shaft 13 through the flat key 17, then the bearing seat 14 is installed, and finally the handwheel shaft 13 with bevel gear I16 is rotatably supported and installed in the bearing seat 14, so that bevel gear I16 meshes with bevel gear II6.
[0049] It should be noted that this utility model uses a flat key 17 to concentrically connect the bevel gear I 16 to the power output end of the handwheel shaft 13, ensuring the accuracy and stability of power transmission, avoiding transmission errors caused by eccentricity or looseness, and improving indexing accuracy. The installation position and direction of the bearing seat 14 are precisely adjusted to ensure that the handwheel shaft 13 can rotate smoothly inside it, reducing friction and wear, and extending the service life of the components. Before formal installation, the bevel gear I 16 and the handwheel shaft 13 are pre-assembled to check their fit, ensuring there is no looseness or jamming, which helps to identify and solve potential problems in advance, improving assembly efficiency and quality. The sequence of "connecting the bevel gear I 16 to the handwheel shaft 13 first, then installing the bearing seat 14, and finally performing overall assembly" is a reasonable process design with clear steps, which helps to reduce assembly time and improve assembly efficiency. During the assembly process, the assembly sequence and method of each component are optimized to ensure the smooth progress of the assembly process and the stable fit of the components. Each step in the assembly method is designed to be relatively simple and easy to understand. Operators only need to follow the steps to complete the assembly task, reducing the skill requirements for operators and improving the convenience and operability of assembly. Through precise component matching and efficient assembly process, the handwheel drive mechanism achieves stable transmission performance. The meshing transmission between bevel gear I16 and bevel gear II6 is smooth and efficient, accurately transmitting the power of the handwheel to the rotating base 3. Each step in the assembly method undergoes strict quality control and inspection to ensure that the assembly quality of each component meets the design requirements. This helps to improve the reliability of the entire handwheel drive mechanism and reduce the probability of failure. The handwheel drive mechanism adopts a modular design, with tight connections between components but easy disassembly. This facilitates quick maintenance and repair when needed, reducing downtime.
[0050] (like Figure 7 The method of using this utility model device includes the following steps:
[0051] S1. The fixed base 1 of the device is concentrically fixed to the drilling machine, and the thin sheet part 10 is concentrically pressed and fixed on the support frame 5 of the device by the spring washer 11 and the nut 12.
[0052] It should be noted that in step S1, the fixed base 1 of the device is concentrically fixed to the drilling machine, ensuring the stability of the entire device during the processing. At the same time, the thin sheet part 10 is concentrically pressed and fixed on the support frame 5 by the spring washer 11 and the nut 12, ensuring the precise position of the thin sheet part during the processing and avoiding processing errors caused by loosening or offset.
[0053] S2. Rotate the handwheel to rotate the base 3 so that the zero position of the scale line II3a of the rotating base 3 corresponds to and coincides with the zero position of the scale line I1a of the fixed base 1, and perform drilling and tapping of the first threaded hole 10a.
[0054] It should be noted that in step S2, rotating the handwheel rotates the base 3 so that the zero position of the scale line II3a on the rotating base 3 corresponds to and coincides with the zero position of the scale line I1a on the fixed base 1. This zero-position alignment provides a precise reference for subsequent processing, ensuring that the drilling and tapping position of the first threaded hole 10a is accurate.
[0055] S3. According to the position requirements of the threaded hole 10a of the thin sheet part 10, continue to rotate the handwheel to realize the rotation of the rotating base 3 until the zero position of the scale line II3a of the rotating base 3 coincides with the scale line I1a at the required angle of the fixed base 1, and then perform drilling and tapping of the second threaded hole 10a.
[0056] It should be noted that in step S3, according to the position requirement of the threaded hole 10a of the sheet part 10, the handwheel is rotated to rotate the rotating base 3 until the zero position of the scale line II3a of the rotating base 3 coincides with the scale line I1a at the required angle of the fixed base 1. This flexible indexing operation allows the device to adapt to the processing of threaded holes with different position requirements, improving the versatility and flexibility of the device.
[0057] S4. Continue to rotate the handwheel to rotate the base 3, and so on, to complete the machining of all threaded holes 10a of the thin sheet part 10 in sequence.
[0058] It should be noted that in step S4, the handwheel is rotated to rotate the base 3, and so on, to sequentially complete the machining of all threaded holes 10a on the sheet part 10. This sequential machining method avoids the efficiency reduction and error accumulation caused by frequent changes in machining positions, thus improving machining efficiency and accuracy.
[0059] As can be seen, through precise zero-position alignment, flexible indexing operation, and sequential processing, this method achieves high-precision machining of threaded holes 10a on thin sheet parts. The position of each threaded hole 10a is precisely calculated and positioned, ensuring the stability and consistency of machining quality. The concentric connection between the device and the drilling machine, the clamping and fixing of the thin sheet part 10, and the precise indexing of the rotating base 3, together guarantee high stability during the machining process. This stability reduces machining errors caused by vibration, loosening, or offset, improving machining accuracy and reliability. The method is clear in its steps and simple to operate; operators only need to follow the steps to complete the drilling and tapping of thin sheet parts. This ease of operation reduces the skill requirements for operators and improves machining efficiency. The structural design and operating method of the device make maintenance and repair relatively easy. If any problems or malfunctions are encountered during machining, operators can quickly locate and resolve the issues, reducing downtime and maintenance costs.
[0060] As can be seen from the above description, this utility model's thin-sheet part drilling and tapping indexing device has technical advantages such as precise positioning and fixing, efficient indexing and processing, high precision and stability, and ease of operation and maintenance. These advantages together ensure the efficient and precise processing of thin-sheet parts, meeting the demands of modern manufacturing for high-precision and high-efficiency processing.
[0061] In summary, this invention effectively solves the technical problem of low yield rate when drilling holes in thin-sheet structural parts. This invention is suitable for thin-sheet parts with a thickness h1 of 0.7 mm. The present invention addresses the technical problem of low efficiency and high scrap rate (up to 30%) when drilling holes with a diameter of 1.6mm by fitter. By using the indexing device of this invention, the scrap rate is reduced to 2%, and the entire hole processing can be completed directly on the indexing device while ensuring accuracy. It eliminates the need for two separate processes: machining the center point and drilling by fitter, thus saving turnaround time between processes, ensuring processing accuracy, and reducing processing costs.
[0062] The indexing device described in this utility model can be used not only for thin sheet parts, but also for other structural parts. When mass-producing parts, it is more efficient and has a higher pass rate than hand-held part drilling. Moreover, it does not require the machining center point hole process, saving turnaround time.
[0063] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.
[0064] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Any modifications and equivalent substitutions made within the spirit and principles of the present utility model are included within the scope of protection of the present utility model.
Claims
1. A drilling and tapping indexing device for thin sheet parts, characterized in that: The system includes a rotary indexing mechanism, which includes a fixed base (1) concentrically connected to the drilling machine and a rotary base (3). The rotary base (3) rotates concentrically relative to the fixed base (1) and is driven to rotate by a handwheel drive mechanism installed on the vertical side. The handwheel drive mechanism drives the rotary base (3) to rotate by right-angle bevel gear transmission. The rotary base (3) is concentrically connected to a nut clamping mechanism and drives the nut clamping mechanism to rotate concentrically. The nut clamping mechanism includes a support frame (5). The support frame (5) clamps and fixes the thin sheet part (10) concentrically by a nut (12) and a spring washer (11) to achieve synchronous rotation of the thin sheet part (10).
2. The apparatus according to claim 1, characterized in that: The fixed base (1) is an inverted T-shaped structure. The rotation of the rotating base (3) is achieved by the rotation support of the high-precision rotating bearing (2) between the vertical part at the top center of the fixed base (1) and the rotating base (3).
3. The apparatus according to claim 2, characterized in that: The upper horizontal surface of the inverted T-shaped structure of the fixed base (1) has several scale lines I (1a) according to the angle requirements. The scale lines I (1a) are based on the commonly used angle division requirements, and the division angles are 10°, 22.5°, 30°, 40°, 45°, 50°, 60°, 67.5°, 70°, 80° and 90° within the range of less than 90°.
4. The apparatus according to claim 2, characterized in that: The rotating base (3) and the support frame (5) are concentrically fixed together by screw I (4); the outer cylindrical surface of the rotating base (3) is provided with scale line II (3a), and the bottom outer cylindrical surface of the support frame (5) is provided with scale line III (5a), and scale line II (3a) coincides with scale line III (5a); the top center of the rotating base (3) is provided with a vertically upward transmission spindle, and the transmission spindle serves as the power input for the rotation of the rotating base (3).
5. The apparatus according to claim 4, characterized in that: The support frame (5) has a notch I (5b) on its side, which is used to install a handwheel drive mechanism. The handwheel drive mechanism has a bearing seat (14). The bottom of the bearing seat (14) is fixed to the outside of the rotating base (3) by screw II (18). The handwheel shaft (13) is rotatably supported and installed in the bearing seat (14) by bearing (15). The power input end of the handwheel shaft (13) is provided with a handwheel. The power output end of the handwheel shaft (13) is coaxially fixed to bevel gear I (16) by a flat key (17). The bevel gear I (16) drives vertically and meshes with bevel gear II (6). The bevel gear II (6) is concentrically fixed to the transmission spindle of the rotating base (3) by a cylindrical pin (7). Rotating the handwheel causes the rotating base (3) to rotate.
6. The apparatus according to claim 5, characterized in that: The inner diameter of the bearing housing (14) The tooth tip circle diameter of bevel gear I (16) satisfy 7. The apparatus according to claim 5, characterized in that: The support frame (5) has an annular groove and a central stud at its top. The central stud is concentrically located at the center of the annular groove. The bottom of the central stud has a D-shaped hole (5c). The bottom of the annular groove is provided with a long strip-structured segmented bracket I (8) and a segmented bracket II (19). The segmented bracket II (19) passes through the D-shaped hole (5c) and intersects with the segmented bracket I (8) in a cross shape and is coplanar. The upper surface of the segmented bracket I (8) has several notches II (8a) spaced at a certain distance. The upper surface of frame II (19) is provided with several notches III (19a) at certain intervals; the notches II (8a) and III (19a) are used to position and fit several concentric and ring-shaped partition sleeves (9), the center of the partition sleeves (9) coincides with the rotation center of the support frame (5); the partition sleeves (9) are arranged in multiple layers according to the size of the drilling table, and the thin sheet parts (10) are concentrically pressed and fixed on the partition sleeves (9) by spring washers (11) and nuts (12), the size of each layer of partition sleeves (9) is as follows. and According to the center distance dimension of the threaded hole (10a) to be machined in the thin sheet part (10) Threaded hole (10a) diameter Large outer diameter Set and ensure the center distance dimension of the threaded hole (10a) on the sheet part (10). Located in the gap between the two partition sleeves (9), the diameter of the threaded hole (10a) is... The gap distance between two adjacent partition sleeves (9) is smaller than that between adjacent partition sleeves (9) to avoid damaging the partition sleeves (9) when drilling and tapping.
8. The apparatus according to claim 7, characterized in that: The outer diameter of the thin sheet part (10) is The thickness is h1, and its diameter is... Several diameters to be processed are evenly distributed on the surface. Threaded hole (10a).