A honeycomb core fixture module assembly for a honeycomb drilling apparatus

Abstract

The utility model provides a kind of honeycomb core fixed module assembly of honeycomb drilling device, belong to honeycomb drilling device technical field, the honeycomb core fixed module assembly of this honeycomb drilling device includes base plate, bearing frame, positioning press block and adjusting bolt, the upper surface middle region of base plate is equipped with positioning recess, the lower edge of bearing frame is connected with the upper surface edge of base plate by hinge shaft, bearing frame can rotate and move relative to base plate around hinge shaft, positioning press block is arranged on the inside of bearing frame, the stem of adjusting bolt passes through the side wall of bearing frame and is connected with the back of positioning press block by screw thread;It can solve the problem that the clamping structure of existing fixing device often causes local stress concentration on the surface of honeycomb core, even damages the honeycomb structure of honeycomb core, affects the service performance and subsequent processing quality of honeycomb core.

Description

Technical Field

[0001] This utility model belongs to the technical field of honeycomb drilling devices, and more specifically, it relates to a honeycomb core fixing module assembly for a honeycomb drilling device. Background Technology

[0002] As a lightweight and high-strength structural material, honeycomb cores are widely used in aerospace, automotive manufacturing, building decoration, and other fields. In many applications, honeycomb cores need to be drilled to meet subsequent assembly, connection, or functional requirements. For example, in the manufacturing process of composite sandwich structures for aircraft, holes need to be drilled in the honeycomb core to install fasteners and connect the panels to the honeycomb core. In the production of lightweight automotive components, honeycomb cores are drilled to install various fasteners and connectors. However, the honeycomb core itself has a special structure consisting of a large number of honeycomb-shaped pores. The material is relatively soft and has limited compressive strength. If it is not firmly fixed during the drilling process, the torque generated by the rotation of the drill bit will cause the honeycomb core to rotate. The axial feed force of the drill bit will cause the honeycomb core to have axial displacement. These displacements and rotations directly cause the drilling position to deviate from the predetermined coordinates, the hole diameter to exceed the tolerance, the hole wall quality to decrease, or even tear the honeycomb structure, seriously affecting product quality and subsequent assembly accuracy. Existing technologies mainly employ two methods for fixing honeycomb cores: simple clamping and vacuum adsorption. Simple clamps typically use a flat plate clamping structure, where the honeycomb core is pressed and fixed by two plates. This method suffers from problems such as small contact area and uneven clamping force distribution, which can easily cause localized indentation and deformation of the honeycomb core at the clamping position. Furthermore, it has poor adaptability to different specifications of honeycomb cores, requiring adjustment of clamping parameters or even replacement of the clamping device each time the specification is changed. Vacuum adsorption fixation uses negative pressure to adsorb and fix the honeycomb core on the worktable surface. However, this method requires auxiliary equipment such as vacuum pumps, increasing costs and system complexity. It also has high requirements for the flatness and sealing of the bottom surface of the honeycomb core. In practical applications, the adsorption force is often insufficient to resist the torque and axial force during drilling, resulting in insufficient fixation reliability. Utility Model Content

[0003] In view of this, the present invention provides a honeycomb core fixing module assembly for a honeycomb drilling device, which can solve the technical problem of insufficient fixing reliability of existing honeycomb core fixing devices used in honeycomb drilling operations. Specifically, the fixing mechanism has poor adaptability to honeycomb cores of different specifications, the clamping force is difficult to adjust precisely, and the honeycomb core is prone to displacement or rotation due to the torque and axial force generated by the rotation of the drill bit during the drilling process, resulting in a decrease in drilling position accuracy. At the same time, the clamping structure of the existing fixing device often causes local stress concentration on the surface of the honeycomb core or even damages the honeycomb structure of the honeycomb core, affecting the performance of the honeycomb core and the quality of subsequent processing.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a honeycomb core fixing module assembly for a honeycomb drilling device, including a base plate, a support frame, a positioning block, and an adjusting bolt. The base plate has a positioning groove in the middle of its upper surface. The lower edge of the support frame is connected to the upper surface edge of the base plate via a hinge axis, allowing the support frame to rotate relative to the base plate around the hinge axis. The positioning block is located on the inner side of the support frame. The rod of the adjusting bolt passes through the side wall of the support frame and is threaded to the back of the positioning block. When the adjusting bolt rotates, it drives the positioning block to move in a direction perpendicular to the inner side of the support frame. The working surface of the positioning block is an arc-shaped concave surface for contacting the outer peripheral surface of the honeycomb core.

[0006] The technical advantages of the honeycomb core fixing module assembly of the honeycomb drilling device provided by this utility model are as follows: the positioning groove on the base plate is connected to the hinge of the support frame, so that the honeycomb core can be first placed into the positioning groove for initial positioning, and then the honeycomb core is surrounded and fixed by the rotation and closure of the support frame. The arc-shaped concave surface of the positioning block can form a large-area contact with the outer peripheral surface of the honeycomb core, increasing the friction and contact area. The structure of adjusting the bolt to drive the positioning block to move allows the clamping force to be precisely adjusted according to the honeycomb core of different specifications, avoiding the problem of honeycomb core deformation due to excessive fixing force or displacement of the honeycomb core during drilling due to insufficient fixing force. The overall structure is simple, reliable and highly adaptable.

[0007] Based on the above technical solution, the honeycomb core fixing module assembly of the honeycomb drilling device of this utility model can be further improved as follows:

[0008] The positioning groove has a trapezoidal cross-sectional shape, and the width of the upper base of the trapezoid is smaller than the width of the lower base.

[0009] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The positioning groove adopts a trapezoidal cross-section with the upper base smaller than the lower base, which allows the honeycomb core to sink naturally under the action of gravity and be stuck in the bottom of the groove after being placed in the groove. The inclined side of the trapezoid provides guidance and limit to the side of the honeycomb core, preventing the honeycomb core from shifting laterally during the initial placement stage. This structure, which is narrow at the top and wide at the bottom, enhances the stability of the honeycomb core in the groove, creating good initial positioning conditions for the subsequent closure of the support frame and clamping of the positioning pressure block, reducing the number of times the operator has to adjust the position of the honeycomb core and improving the clamping efficiency.

[0010] Furthermore, the cross-sectional shape of the support frame is U-shaped, and the two vertical sidewalls of the support frame are symmetrically arranged on both sides of the base plate.

[0011] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The support frame adopts a U-shaped cross-section structure and two vertical side walls are symmetrically distributed on both sides of the base plate, forming a three-sided enclosure of the honeycomb core. Together with the base plate, it forms a complete four-sided constrained space. The U-shaped structure has good rigidity and anti-deformation ability. When the positioning pressure block applies clamping force, the support frame is not easy to bend and deform, ensuring that the clamping force can be effectively transmitted to the surface of the honeycomb core. The two symmetrically distributed side walls make the clamping force evenly applied on both sides of the honeycomb core, avoiding the situation where the honeycomb core tilts or twists due to unilateral force.

[0012] Furthermore, the radius of curvature of the working surface of the positioning block is 30~50mm.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the radius of curvature of the working surface of the positioning block is set in the range of 30~50mm. This curvature range matches the outer diameter of common honeycomb cores, which enables the positioning block to form a good arc surface fit with the outer peripheral surface of various specifications of honeycomb cores, increasing the contact area and thus improving the friction and clamping reliability. Too small a radius of curvature will lead to a reduction in the contact area or even point contact, which will damage the honeycomb core surface. Too large a radius of curvature will make the fit worse and reduce the clamping effect. The selection of this curvature range takes into account both the clamping force and the protection of the honeycomb core.

[0014] Furthermore, positioning blocks are respectively provided on the two vertical side walls of the support frame, and the two positioning blocks are symmetrically distributed about the geometric center of the base plate.

[0015] The beneficial effects of adopting the above-mentioned improved scheme are as follows: positioning blocks are respectively set on the two vertical side walls of the support frame and symmetrically distributed about the geometric center of the base plate, realizing the simultaneous clamping of the honeycomb core on both sides. The two positioning blocks simultaneously apply clamping forces in opposite directions to the honeycomb core, so that the honeycomb core is balanced by force during the clamping process and will not shift. The symmetrical arrangement of the structure also ensures that the axis of the honeycomb core coincides with the center line of the base plate, providing a precise position reference for subsequent drilling operations, avoiding the problem of drilling position deviation caused by the eccentricity of the honeycomb core, and improving drilling accuracy.

[0016] Furthermore, the hinge axis extends along the long side of the base plate, and the axis of the hinge axis is parallel to the upper surface of the base plate.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The arrangement of the hinge shaft extending along the long side of the base plate and the axis being parallel to the upper surface of the base plate allows the support frame to open upward or close downward with the long side of the base plate as the rotation center. This rotation method provides ample operating space for the insertion and removal of the honeycomb core. Operators can easily place the honeycomb core into the positioning groove or remove it from the groove from above. The arrangement of the hinge shaft parallel to the surface of the base plate ensures that the support frame forms a stable hinge structure with the base plate in the closed state, and will not open automatically due to gravity, thus improving the safety and reliability of the clamping process.

[0018] Furthermore, the working surface of the positioning block is provided with multiple parallel anti-slip ridges, which extend along the arc direction of the working surface of the positioning block.

[0019] The beneficial effects of the above-mentioned improvement scheme are as follows: multiple parallel anti-slip ridges are set on the arc-shaped working surface of the positioning block, and the ridges extend along the arc direction. These ridges can be embedded in the micro-concave-convex structure of the outer surface of the honeycomb core, which significantly increases the friction coefficient between the positioning block and the honeycomb core. This effectively prevents the honeycomb core from rotating due to the torque generated by the rotation of the drill bit during the drilling process. The parallel ridges can also disperse the clamping force to avoid stress concentration and protect the honeycomb core surface from being damaged by pressure. The design of the ridges extending along the arc direction allows each ridge to form line contact with the honeycomb core surface, maximizing the anti-slip effect.

[0020] Furthermore, the base plate is made of aluminum alloy, and the support frame is made of stainless steel.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The base plate is made of aluminum alloy, which takes advantage of the lightweight and easy-to-move and operate characteristics of aluminum alloy. At the same time, aluminum alloy has sufficient strength and rigidity to support the weight of the honeycomb core and resist the reaction force generated during drilling. The support frame is made of stainless steel, which has higher strength and hardness and can withstand the large stress generated when the positioning blocks are clamped without deformation. The corrosion resistance of stainless steel also extends the service life of the support frame. The reasonable combination of the two materials not only ensures the strength and rigidity of the overall structure but also controls the total weight of the components, achieving a balance between performance and portability.

[0022] Furthermore, the length of the threaded section of the adjusting bolt is greater than the sum of the thickness of the side wall of the support frame and the maximum travel of the positioning block.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The length of the threaded section of the adjusting bolt is designed to be greater than the sum of the thickness of the side wall of the bearing frame and the maximum travel of the positioning block. This ensures that when the positioning block reaches its maximum travel distance, the threaded section of the bolt still maintains a sufficient engagement length with the positioning block, avoiding loosening or stripping of the connection due to insufficient thread engagement length. This design also provides a sufficient adjustment range for honeycomb cores of different outer diameters, enabling the component to adapt to the fixing needs of various specifications of honeycomb cores from small diameter to large diameter, enhancing the versatility and practicality of the component, and reducing the frequency of needing to replace the fixing component due to the replacement of honeycomb cores of different specifications.

[0024] Furthermore, the depth of the positioning groove is 5~15mm, and the bottom surface of the positioning groove is provided with multiple circular anti-slip protrusions, the height of which is 1~3mm.

[0025] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the depth of the positioning groove is controlled within the range of 5~15mm. This depth can provide sufficient embedding space for the honeycomb core to form an effective vertical limit, while preventing the honeycomb core from being embedded too deeply and affecting the removal operation. The multiple circular anti-slip protrusions set on the bottom surface of the groove have a height of 1~3mm. These protrusions can form multi-point contact with the bottom surface of the honeycomb core, increasing the friction and preventing the honeycomb core from sliding in the groove. The design of the circular protrusions avoids sharp protrusions from damaging the bottom of the honeycomb core. The moderate height of the protrusions ensures the anti-slip effect without excessively pressing into the bottom material of the honeycomb core. This combination of depth and anti-slip protrusions significantly improves the initial positioning stability of the honeycomb core on the base plate.

[0026] Compared with existing technologies, the beneficial effects of the honeycomb core fixing module assembly of the honeycomb drilling device provided by this utility model are as follows: This utility model achieves reliable fixing and precise positioning of the honeycomb core through the overall frame structure of the positioning groove of the base plate and the hinged cooperation with the support frame, combined with the arc-shaped working surface of the positioning pressure block and the driving mechanism of the adjusting bolt, effectively solving the core technical problem of insufficient fixing reliability in existing technologies. The trapezoidal cross-section design of the positioning groove provides a stable initial positioning foundation for the honeycomb core, preventing displacement before clamping. The U-shaped structure and hinge method of the support frame provide sufficient operating space while ensuring overall rigidity. The positioning pressure blocks arranged symmetrically on both sides form a large-area contact with the outer periphery of the honeycomb core through the arc-shaped working surface, and the anti-slip convex structure significantly increases the friction, effectively resisting the torque and axial force during the drilling process, and preventing the rotation and axial displacement of the honeycomb core. The mechanism of the adjusting bolt driving the movement of the positioning pressure block allows the clamping force to be precisely adjusted according to the specifications and material characteristics of the honeycomb core, ensuring sufficient clamping force while avoiding deformation or damage to the honeycomb core caused by over-clamping. It has strong adaptability and can meet the fixing requirements of honeycomb cores of different specifications. The base plate and support frame are made of a combination of aluminum alloy and stainless steel, which ensures strength and rigidity while controlling weight and improving ease of operation. The shape design and positional relationship of each component in the overall structure have been optimized, resulting in a uniform distribution of clamping force to avoid stress concentration, protect the integrity of the honeycomb core, improve the accuracy and efficiency of drilling operations, and reduce the scrap rate. Compared with existing technologies, it represents a significant improvement with more reliable fixation, greater adaptability, more convenient operation, and better protection of the honeycomb core. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a honeycomb core fixing module assembly for a honeycomb drilling device;

[0029] Figure 2 A schematic diagram of the working surface of the positioning block;

[0030] Figure 3 A schematic diagram of the bottom surface of the positioning groove;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 10. Base plate; 20. Support frame; 30. Positioning block; 40. Adjusting bolt. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figure 1-3 The figure shows a schematic diagram of the honeycomb core fixing module assembly of a honeycomb drilling device provided by this utility model. The figure includes a base plate 10, a support frame 20, a positioning block 30, and an adjusting bolt 40. The upper surface of the base plate is provided with a positioning groove in the middle area. The lower edge of the support frame is connected to the upper surface edge of the base plate through a hinge shaft. The support frame can rotate relative to the base plate around the hinge shaft. The positioning block is set on the inner side of the support frame. The rod of the adjusting bolt passes through the side wall of the support frame and is threaded to the back of the positioning block. When the adjusting bolt rotates, it can drive the positioning block to move in a direction perpendicular to the inner side of the support frame. The working surface of the positioning block is an arc-shaped concave surface for contacting the outer peripheral surface of the honeycomb core.

[0035] In the above technical solution, the cross-sectional shape of the positioning groove is trapezoidal, and the width of the upper base of the trapezoid is smaller than the width of the lower base.

[0036] Furthermore, in the above technical solution, the cross-sectional shape of the support frame is a U-shaped structure, and the two vertical side walls of the support frame are symmetrically arranged on both sides of the base plate.

[0037] Furthermore, in the above technical solution, the radius of curvature of the working surface of the positioning block is 30~50mm.

[0038] Furthermore, in the above technical solution, positioning blocks are respectively provided on the two vertical side walls of the support frame, and the two positioning blocks are symmetrically distributed about the geometric center of the base plate.

[0039] Furthermore, in the above technical solution, the hinge shaft extends along the long side of the base plate, and the axis of the hinge shaft is parallel to the upper surface of the base plate.

[0040] Furthermore, in the above technical solution, the working surface of the positioning block is provided with multiple parallel anti-slip ridges, which extend along the arc direction of the working surface of the positioning block.

[0041] Furthermore, in the above technical solution, the base plate is made of aluminum alloy and the support frame is made of stainless steel.

[0042] Furthermore, in the above technical solution, the length of the threaded section of the adjusting bolt is greater than the sum of the thickness of the side wall of the bearing frame and the maximum travel of the positioning block.

[0043] Furthermore, in the above technical solution, the depth of the positioning groove is 5~15mm, and the bottom surface of the positioning groove is provided with multiple circular anti-slip protrusions, the height of which is 1~3mm.

[0044] The following is a specific embodiment 1 of this utility model: In this embodiment, the base plate is made of 6061 aluminum alloy material by CNC milling. The base plate has a rectangular plate structure with a length of 280mm, a width of 180mm, and a thickness of 12mm. A positioning groove is milled in the middle area of ​​the upper surface of the base plate. The cross-section of the positioning groove is trapezoidal. The upper base of the trapezoid is 85mm wide, the lower base is 90mm wide, and the groove depth is 10mm. The angle between the two hypotenuses of the trapezoid and the bottom surface is 85°. Nine circular anti-slip protrusions are evenly distributed on the bottom surface of the groove. The diameter of the protrusions is 5mm, the height is 2mm, and the distance between the protrusions is 25mm. The protrusions are formed by pressing a cylindrical rubber part into the bottom surface of the groove after drilling holes. The support frame is made of 304 stainless steel sheet through bending and welding process. The support frame has a U-shaped cross-section structure. The bottom side of the U-shaped structure is 280mm long, which is the same as the length of the base plate. The two vertical side walls are 120mm high and the side wall sheet is 3mm thick. A cylindrical hinge shaft with a diameter of 8mm is welded to each end of the bottom side of the support frame. The hinge shaft is inserted into the hinge hole at the corresponding position at both ends of the long side of the base plate. Copper bushing bearings are installed in the hinge hole to reduce rotational friction. The axis of the hinge shaft is parallel to the upper surface of the base plate and extends along the long side of the base plate. The positioning blocks are made of 45# steel through turning and milling. Each positioning block has a fan-shaped block structure with a radius of curvature of 40mm on the arc working surface and a central angle of 60 degrees. Five anti-slip ridges are evenly milled along the arc direction on the arc working surface. The ridges are semi-cylindrical with a height of 1.5mm, a width of 2mm, and a spacing of 8mm between adjacent ridges. An internal threaded hole is machined at the center of the back of the positioning block. The thread specification is M10 standard coarse thread. A through hole with a diameter of 11mm is drilled at the middle of each of the two vertical side walls of the support frame. The geometric center of the through hole is 60mm away from the bottom edge of the support frame. The two through holes are symmetrically distributed about the longitudinal center line of the base plate. The adjusting bolt is made of carbon steel with an M10 standard coarse thread. The thread length is 55mm. The bolt head is hexagonal for easy wrench operation. The distance between the two sides of the hexagonal head is 17mm. The bolt shank passes through the through hole on the side wall of the support frame and then screws into the internal threaded hole on the back of the positioning block. A 0.5mm gap is left between the through hole and the bolt shank to ensure that the bolt can rotate freely. A flat washer and a spring washer are installed between the bolt head and the outer surface of the side wall of the support frame to prevent the bolt from loosening.During use, the honeycomb core to be processed is placed into the positioning groove. The honeycomb core has an outer diameter of 80mm and a height of 100mm, and is made of aluminum honeycomb. Rotating the adjusting bolt moves the positioning block towards the honeycomb core. The arc-shaped working surface of the positioning block makes contact with the outer circumferential surface of the honeycomb core. Continue rotating the bolt for about 3 turns. The radial clamping force applied by the positioning block to the honeycomb core is about 150~200N. At this time, the honeycomb core is firmly fixed. During drilling, the torque and axial feed force generated by the rotation of the drill bit are reliably constrained by the fixing system. The honeycomb core does not experience any displacement or rotation. The drilling position accuracy is controlled within 0.2mm, and the hole wall quality is good with no tearing. The arc-shaped contact surface and anti-slip ridges of the positioning block disperse the clamping stress. No indentations or deformation appear on the surface of the honeycomb core. The fixing and loosening operations each take about 30 seconds, resulting in high work efficiency.

[0045] The following is another specific embodiment 2 of this utility model: This embodiment 2 is based on embodiment 1, and the structure of the positioning block is improved. In addition to the parallel anti-slip ridges on the arc-shaped working surface of the positioning block, a rubber pad with a thickness of 1mm is filled in the recessed area between the ridges. The rubber pad is made of nitrile rubber material with a hardness of Shore A 70 degrees. It is fixed to the arc-shaped working surface of the positioning block by adhesive. The surface of the rubber pad is flush with the top of the anti-slip ridges to form a continuous contact surface. This improved structure allows the rubber pad to undergo slight elastic deformation when the positioning block clamps the honeycomb core, better conforming to the microscopic unevenness of the outer surface of the honeycomb core. This further increases the contact area and friction. At the same time, the buffering effect of the rubber material can absorb some of the clamping stress, providing better protection for the honeycomb core surface. It is particularly suitable for fixing paper honeycomb or glass fiber honeycomb with relatively fragile surfaces. In actual use, after adopting this improved structure, for paper honeycomb materials with low hardness, there are no indentations on the honeycomb core surface after clamping, and the fixing reliability is comparable to that of Example 1. The service life of the rubber pad is about 5,000 clamping cycles, and the new rubber pad can be easily replaced after wear.

[0046] The following is another specific embodiment 3 of this utility model: This embodiment 3 is based on embodiment 1, and improves the connection method between the base plate and the support frame. A locking mechanism is added at the middle of the U-shaped bottom edge of the support frame. The locking mechanism includes a locking pin and a locking hole. The locking pin is a cylindrical pin with a diameter of 6mm and a length of 25mm. One end of the locking pin is fixed to the middle of the bottom edge of the support frame by welding or threaded connection. The locking pin extends downward perpendicularly to the bottom edge of the support frame. A locking hole is opened at the corresponding position on the upper surface of the base plate. The locking hole is a cylindrical through hole with a diameter of 6.2mm, slightly larger than the diameter of the locking pin, and a depth of 20mm. When the support frame is closed downward to a position parallel to the base plate... When in place, the locking pin automatically inserts into the locking hole. The locking pin and the locking hole are in clearance fit. The end of the locking pin is machined with an annular groove. After the locking pin is fully inserted into the locking hole, by inserting a cotter pin or installing a snap ring in the annular groove, the support frame can be prevented from accidentally opening upwards when subjected to external force. This improved structure increases the stability and safety of the support frame in the closed state, and is particularly suitable for fixing large honeycomb cores. Even if subjected to large vibrations or impacts during drilling, the support frame can remain closed and will not loosen, improving operational safety. The unlocking operation of the locking mechanism is also very simple. Just remove the cotter pin or snap ring and lift the support frame upwards, without affecting normal loading and unloading efficiency.

[0047] Specifically, the principle of this utility model is as follows: This utility model adopts a three-stage fixing principle, which uses a positioning groove on the base plate for initial positioning and a hinged enclosure of the support frame for radial clamping with positioning blocks. This achieves reliable fixing of the honeycomb core and solves the core technical problem of insufficient fixing reliability. First, the trapezoidal positioning groove on the base plate utilizes its top-narrow, bottom-wide geometry to guide the honeycomb core to naturally sink to the bottom of the groove when it is placed in. The circular anti-slip protrusions on the bottom of the groove form multi-point frictional contact with the bottom of the honeycomb core, providing initial vertical and horizontal limiting and preventing arbitrary movement of the honeycomb core before clamping, thus creating a stable foundation for subsequent precise clamping. Second, the support frame is connected to the base plate through a hinge shaft, which is arranged parallel to the long side of the base plate. This allows the support frame to open upwards or close downwards around this axis. In the closed state, the U-shaped cross-section structure of the support frame, together with the base plate, forms a four-sided enclosure space for the honeycomb core. The high rigidity of the U-shaped structure ensures that the support frame does not deform when clamping force is applied, maintaining the geometric accuracy of the fixing system. Third, the positioning blocks are located on the inner side of the support frame. The radius of curvature of their arc-shaped working surfaces matches the outer diameter of the honeycomb core. The adjusting bolts pass through the side wall of the support frame and are threadedly connected to the positioning blocks. When the bolts are rotated, their axial position remains unchanged under the constraint of the side wall of the support frame. The threaded transmission converts the rotational motion into the linear motion of the positioning blocks, driving them to move towards the honeycomb core in a direction perpendicular to the inner side of the support frame. The arc-shaped working surface of the positioning blocks gradually comes into contact with the outer circumferential surface of the honeycomb core, forming a large area of ​​arc-shaped contact. The anti-slip ridges on the working surface are embedded in the micro-concave-convex structure of the honeycomb core surface, significantly increasing the coefficient of friction. The positioning blocks on both sides... The applied radial clamping force balances the honeycomb core in the radial direction, preventing radial displacement and rotation around the axis. Combined with the axial and bottom constraints of the base plate groove and the top and side constraints of the support frame, this forms a comprehensive restriction on the six degrees of freedom of the honeycomb core. This fundamentally eliminates the possibility of displacement and rotation of the honeycomb core during drilling. The mechanism of adjusting the bolts to control the clamping force allows the clamping force to be precisely matched to the load-bearing capacity of honeycomb cores of different specifications and materials, ensuring both fixation reliability and avoiding damage caused by over-clamping. In principle, this achieves a unity of fixation reliability and honeycomb core protection.

[0048] First, place the base plate on the worktable of the drilling equipment. Secure the base plate to the worktable using bolts through the mounting holes, ensuring its stability. Then, rotate the adjusting bolts to return the positioning block to its initial position away from the center of the base plate. Next, rotate the support frame upwards, allowing it to rotate around the hinge axis to a 90-degree or greater angle with the base plate. At this point, the positioning groove of the base plate is fully exposed, facilitating the placement of the honeycomb core. The operator vertically places the honeycomb core to be drilled into the positioning groove, using the trapezoidal guide of the groove to allow the honeycomb core to sink naturally to the bottom. The bottom surface of the honeycomb core contacts the anti-slip protrusions on the bottom surface of the groove, achieving initial positioning. Then, rotate the support frame downwards to close and surround the honeycomb core. The U-shaped sidewalls of the support frame are located on both sides of the honeycomb core. At this point, rotate the adjusting bolts on both sides... The bolt drives the positioning block to move radially toward the honeycomb core. When the arc-shaped working surface of the positioning block contacts the outer circumferential surface of the honeycomb core, the bolt continues to rotate, and the positioning block applies a gradually increasing radial clamping force to the honeycomb core. The operator controls the number of rotations of the bolt according to the material hardness and specifications of the honeycomb core. When appropriate resistance is felt, the rotation is stopped, at which point the honeycomb core is firmly clamped. Then, the drill bit of the drilling equipment is aligned with the marked position on the honeycomb core to be drilled, and the drilling equipment is started to perform the drilling operation. After drilling is completed, the drilling equipment is stopped first, and then the adjusting bolt is rotated in the opposite direction to make the positioning block retract and release the clamping force. The support frame is then opened upwards, and finally the drilled honeycomb core is removed from the positioning groove. The entire operation process is simple and quick, and fixing and loosening can be completed in a short time, improving work efficiency.

Claims

1. A honeycomb core fixing module assembly for a honeycomb drilling device, comprising a base plate, a support frame, a positioning block, and adjusting bolts, characterized in that, The upper surface of the base plate has a positioning groove in the middle area. The lower edge of the support frame is connected to the upper surface edge of the base plate through a hinge shaft. The support frame can rotate relative to the base plate around the hinge shaft. The positioning block is set on the inner side of the support frame. The rod of the adjusting bolt passes through the side wall of the support frame and is threaded to the back of the positioning block. When the adjusting bolt rotates, it can drive the positioning block to move in a direction perpendicular to the inner side of the support frame. The working surface of the positioning block is an arc-shaped concave surface for contacting the outer peripheral surface of the honeycomb core.

2. The honeycomb core fixing module assembly of the honeycomb drilling device according to claim 1, characterized in that, The positioning groove has a trapezoidal cross-sectional shape, and the width of the upper base of the trapezoid is smaller than the width of the lower base.

3. The honeycomb core fixing module assembly of the honeycomb drilling device according to claim 2, characterized in that, The cross-sectional shape of the support frame is U-shaped, and the two vertical sidewalls of the support frame are symmetrically arranged on both sides of the base plate.

4. The honeycomb core fixing module assembly of the honeycomb drilling device according to claim 3, characterized in that, The radius of curvature of the working surface of the positioning block is 30~50mm.

5. The honeycomb core fixing module assembly of a honeycomb drilling device according to claim 4, characterized in that, The positioning blocks are respectively provided on the two vertical side walls of the support frame, and the two positioning blocks are symmetrically distributed about the geometric center of the base plate.

6. The honeycomb core fixing module assembly of a honeycomb drilling device according to claim 5, characterized in that, The hinge axis extends along the long side of the base plate, and the axis of the hinge axis is parallel to the upper surface of the base plate.

7. The honeycomb core fixing module assembly of a honeycomb drilling device according to claim 6, characterized in that, The working surface of the positioning block is provided with multiple parallel anti-slip ridges, which extend along the arc direction of the working surface of the positioning block.

8. The honeycomb core fixing module assembly of the honeycomb drilling device according to claim 7, characterized in that, The base plate is made of aluminum alloy, and the support frame is made of stainless steel.

9. The honeycomb core fixing module assembly of a honeycomb drilling device according to claim 8, characterized in that, The length of the threaded section of the adjusting bolt is greater than the sum of the thickness of the side wall of the support frame and the maximum travel of the positioning block.

10. The honeycomb core fixing module assembly of a honeycomb drilling device according to claim 9, characterized in that, The positioning groove has a depth of 5~15mm, and the bottom surface of the positioning groove is provided with multiple circular anti-slip protrusions, the height of which is 1~3mm.

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