Rotation table for drilling center hole in bar

Abstract

The invention discloses an autorotation table for drilling a center hole in a bar stock, the autorotation table structurally comprises a main body, a plurality of rotating shaft stations arranged on the main body and rotating shafts arranged on the rotating shaft stations, the main body comprises a panel, a bottom plate and side plates, the rotating shaft stations vertically penetrate through the panel and the bottom plate of the main body, the bar stock is vertically fixed in the rotating shafts, and the rotating shafts are arranged on the rotating shaft stations. The positioning sleeve is arranged between the inner wall of the rotating shaft and the bar and is a replaceable positioning sleeve, and when the bar is drilled, the bar rotates along with rotation of the rotating shaft and the positioning sleeve. The bar stock synchronously rotates along with the rotating shaft and the positioning sleeve in the machining process, errors caused by deflection of the drill bit are actively counteracted, the machining precision is effectively improved, meanwhile, the replaceable positioning sleeve can adapt to machining treatment of bar stocks of different sizes, and the machining adaptability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical processing equipment, and in particular to a rotary table for drilling center holes in bar materials. Background Art

[0002] Conventional bar drilling for center holes, especially deep holes, is often plagued by insufficient precision. Because traditional methods rely solely on the rotating drill bit to generate cutting force while the bar remains stationary, this unidirectional force pattern can easily lead to significant deviations in concentricity and perpendicularity in the resulting center hole.

[0003] This technical shortcoming stems from two key factors. First, drill bits with a large aspect ratio have poor rigidity, making them prone to runout during drilling. Second, the workpiece-fixed machining method makes the drilling process completely dependent on the machine's centering accuracy, making it impossible to actively correct for drill runout. This passive machining method, especially when machining high-precision center holes, makes it difficult to ensure hole coaxiality and perpendicularity, severely impacting the quality and efficiency of subsequent machining steps.

[0004] In addition, traditional processing equipment lacks flexibility in bar clamping and positioning, making it difficult to adapt to the processing needs of bars of different specifications, further limiting the improvement of processing accuracy. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a rotary table for drilling center holes in bar stock, so as to solve the technical problems of low bar stock drilling processing efficiency and quality in the related art.

[0006] An embodiment of the present application provides a self-turning table for drilling center holes in rods, comprising: a main body, a plurality of rotating axis stations arranged on the main body, and a rotating axis arranged on the rotating axis station, wherein the main body comprises a panel, a bottom plate, and a side plate, the rotating axis station vertically penetrates the panel and the bottom plate of the main body, the rod is vertically fixed inside the rotating axis, a positioning sleeve is arranged between the inner wall of the rotating shaft and the rod, the positioning sleeve is a replaceable positioning sleeve, and when the rod is drilled, the rod rotates with the rotation of the rotating axis and the positioning sleeve.

[0007] Optionally, the positioning sleeve is placed into and fixed inside the rotating shaft from one side of the base plate.

[0008] Optionally, the turntable for drilling a center hole in a bar further comprises a collet and a locking nut, and the collet is arranged at one end of the rotating shaft, and the locking nut fixes the bar by locking the collet.

[0009] Optionally, the turntable for drilling the center hole of a bar further includes a driving gear and a driven gear, wherein the driven gear is fixed relative to the rotating shaft, the driving gear drives the driven gear to move, and the driven gear drives the rotating shaft to rotate.

[0010] Optionally, the rotary table for drilling the center hole of the bar further includes a speed-regulating brushless motor and a reducer, wherein the speed-regulating brushless motor is sequentially connected to the reducer and the driving gear from bottom to top, and the speed-regulating brushless motor drives the reducer to drive the driving gear to work.

[0011] Optionally, the turntable for drilling center holes in bar material further includes a station bearing and a gear bearing, and the station bearing is installed at the upper and lower ends of the rotating shaft, and the gear bearing is installed at one end of the driving gear close to the panel.

[0012] Optionally, the turntable for drilling the center hole of a bar further includes a bearing seat, wherein the work station bearing installed at the lower end of the rotating shaft is placed on the bearing seat.

[0013] Optionally, the bearing seat is adjustably mounted on the base plate.

[0014] Optionally, the turntable for drilling a center hole in a bar further includes a positioning sleeve fixing screw, and the positioning sleeve fixing screw fixes the positioning sleeve to the rotating shaft.

[0015] Optionally, the rotary table for drilling center holes in bar material further includes a sealing ring, which is mounted on the panel and arranged at the connection between the panel and the rotating shaft.

[0016] The embodiment of the present application provides a turntable for drilling center holes in bar stock, which includes a main body, a plurality of rotating shaft stations arranged on the main body, and a rotating shaft arranged on the rotating shaft station, wherein the main body includes a panel, a bottom plate, and a side plate, and the rotating shaft station vertically penetrates the panel and bottom plate of the main body, the bar stock is vertically fixed inside the rotating shaft, and a positioning sleeve is provided between the inner wall of the rotating shaft and the bar stock, and the positioning sleeve is a replaceable positioning sleeve. When the bar stock is drilled, the bar stock rotates with the rotation of the rotating shaft and the positioning sleeve. By making the bar stock rotate synchronously with the rotating shaft and the positioning sleeve during the processing, the error caused by the drill bit runout is actively offset, and the processing accuracy, especially the concentricity and verticality of the center hole, is effectively improved. It has the advantage of effectively improving the processing accuracy, especially the concentricity and verticality of the center hole. At the same time, the replaceable positioning sleeve can meet the processing requirements of bar stock of different sizes, thereby improving the versatility of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cross-sectional schematic diagram of the structure of a rotary table for drilling center holes in bar stock provided in an embodiment of the present application; Among them, the panel 1, the bottom plate 2, the side plate 3, the rotating shaft 4, the positioning sleeve 5, the collet 6, the locking nut 7, the driving gear 8, the driven gear 9, the speed-regulating brushless motor 10, the reducer 11, the work station bearing 12, the gear bearing 13, the bearing seat 14, the positioning sleeve fixing screw 15, and the sealing strip 16. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0019] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0020] As used herein, the term "including" and its variations are open-ended, i.e., "including but not limited to." The term "based on" means "based, at least in part, on." The term "one embodiment" means "at least one embodiment," the term "another embodiment" means "at least one additional embodiment," and the term "some embodiments" means "at least some embodiments." Other terms are defined in the following description.

[0021] In conventional bar drilling, the drill bit rotates while the bar remains stationary, causing drill bits with large aspect ratios to deflect due to insufficient rigidity. This passive machining method makes it difficult to control the concentricity and verticality of the center hole. Especially during deep hole drilling, the machine's centering accuracy cannot effectively correct the drill bit's tendency to deflect, resulting in poor machining quality stability.

[0022] In order to solve the technical problems existing in the related art, the embodiment of the present application provides a rotary table for drilling center holes in bar materials, see Figure 1 , Figure 1 This is a structural schematic diagram of a turntable for drilling center holes in rods provided in an embodiment of the present application, wherein the turntable for drilling center holes in rods includes: a main body, a plurality of rotating axis stations arranged on the main body, and a rotating axis 4 arranged on the rotating axis station, wherein the main body includes a panel 1, a bottom plate 2 and a side plate 3, the rotating axis station vertically penetrates the panel 1 and the bottom plate 2 of the main body, the rod is vertically fixed inside the rotating axis 4, and a positioning sleeve 5 is provided between the inner wall of the rotating shaft 4 and the rod. The positioning sleeve 5 is a replaceable positioning sleeve. When the rod is drilled, the rod rotates with the rotation of the rotating shaft 4 and the positioning sleeve 5.

[0023] The main body refers to the frame structure that supports the rotating shaft station, which is composed of a panel 1, a bottom plate 2 and a side plate 3. Figure 1 As shown, when forming the main body, steel plate welding or casting process can be adopted, and its panel 1 and bottom plate 2 are connected with the side plate 3 to form a stable support.

[0024] In one embodiment, if Figure 1 As shown, the rotary axis station is a through-hole structure that runs through the upper and lower surfaces of the main body. It is used to accommodate and secure the rotary axis station, and the rotary axis 4 is placed on the rotary axis station. When drilling a bar, the bar is placed inside the rotary axis. At the same time, a positioning sleeve 5 can be placed between the rotary axis and the bar based on the size of the bar to enable drilling of bars of different sizes.

[0025] The entire bar stock center hole drilling rotary table's main structure forms a rigid support platform. A rotating axis station runs vertically through the main structure, ensuring the coaxial accuracy of the rotating axis 4. After the bar stock is loaded into the rotating axis, a replaceable locating sleeve 5 eliminates radial play and achieves precise centering. During machining, the rotating axis 4 drives the locating sleeve 5 and the bar stock to rotate synchronously, creating a compound motion relative to the drill bit.

[0026] Through the above technical solution, this application achieves active rotation control during bar machining, effectively improving the concentricity and perpendicularity of deep hole machining. The replaceable positioning sleeve expands the equipment's machining range, and the distributed design of the rotary axis stations improves batch processing efficiency. The overall structure enhances the equipment's versatility while ensuring machining accuracy.

[0027] Further, refer to Figure 1 , the positioning sleeve 5 is placed into and fixed inside the rotating shaft 4 from one side of the base plate 2 .

[0028] In one embodiment, the positioning sleeve 5 is arranged between the rotating shaft 4 and the rod material to realize drilling processing of different rod materials. For the replaceable positioning sleeve 4, a detachable metal or composite material sleeve can be used. Its inner diameter and thickness can be designed according to actual needs to meet the needs of rod materials of different specifications and sizes. Specifically, positioning sleeves of different sizes are replaced to adapt to rod materials of different diameters.

[0029] For example, the locating sleeve 5 is pushed axially upward through an opening on one side of the base plate 2 into the interior of the rotating shaft 4. The locating sleeve 5 can be secured by means of an interference fit or a threaded connection. When replacing locating sleeves 5 with different specifications to accommodate bar stock of varying sizes, the operator can complete the adjustment by simply removing the old locating sleeve 5 from under the base plate 2 and inserting a new one without disassembling the rotating shaft 4 or the panel 1.

[0030] Through the above technical solution, this application realizes the rapid replacement and precise positioning of the positioning sleeve, avoids the coaxiality deviation caused by multiple disassembly and assembly, and reduces the complexity of equipment maintenance. It is especially suitable for deep hole processing scenarios that require frequent switching of bar specifications.

[0031] Further, refer to Figure 1 The turntable for drilling the center hole of the bar further includes a collet 6 and a locking nut 7, and the collet 6 is arranged at one end of the rotating shaft 4, and the locking nut 7 is fixed by locking the collet 6.

[0032] In one embodiment, the collet 6 and the locking nut 7 are used to fix the bar material. Figure 1 As shown, when the bar is placed inside the rotating shaft 4, the collet 6 is arranged between the bar and the rotating shaft 4, and then the bar is fixed by locking the collet 6 with a locking nut 7. The locking nut 7 can be an annular fastener with an internal thread, such as a hexagonal nut structure, which is spun to clamp the bar.

[0033] In practice, after the bar is inserted into the rotating shaft 4, the collet 6 is placed over the opening of the rotating shaft 4 near the processing end. The locking nut 7 is screwed into the outer wall of the rotating shaft 4 and presses the collet 6 downward. As the locking nut 7 is tightened, the petals of the collet 6 contract toward the center under axial pressure, thus evenly wrapping and clamping the outer surface of the bar. During the drilling process, the rotating shaft 4 drives the collet 6 and the bar to rotate synchronously. The preload of the locking nut 7 prevents the collet 6 from loosening due to vibration or centrifugal force, ensuring that the bar and the rotating shaft 4 rotate coaxially.

[0034] Through the above technical solution, the present application solves the problem of drilling deviation caused by loose clamping of the rod, so that the rod always remains coaxial with the rotating axis during rotation, thereby improving the concentricity and verticality of the drilling.

[0035] Further, refer to Figure 1 The turntable for drilling the center hole of the bar further includes a driving gear 8 and a driven gear 9, wherein the driven gear 9 is relatively fixed to the rotating shaft 4, the driving gear 8 drives the driven gear 9 to move, and the driven gear 9 drives the rotating shaft 4 to rotate.

[0036] In one embodiment, the rotary table for drilling center holes in bar materials further includes a driving gear 8 and a driven gear 9. The driving gear 8 obtains rotational power through a provided driving device to drive the driven gear 9 to rotate, thereby achieving drilling processing on the fixed bar material.

[0037] Further, refer to Figure 1The rotary table for drilling the center hole of the bar further includes a speed-regulating brushless motor 10 and a reducer 11. The speed-regulating brushless motor 10 is sequentially connected to the reducer 11 and the driving gear 8 from bottom to top. The speed-regulating brushless motor 10 drives the reducer 11 to work to drive the driving gear 8 to work.

[0038] In one embodiment, the speed-controlled brushless motor 10 controls the speed and drives the reducer 11 to operate. The reducer 11 drives the driving gear 8 to rotate, thereby driving the associated driven gear 9 to operate.

[0039] For example, the brushless speed control motor 10 can be fixed on the base plate by flange mounting, such as Figure 1 As shown, the output shaft of the speed-regulating brushless motor 10 is coaxially connected to the input end of the speed reducer 11 via a coupling. The output end of the speed reducer 11 is fixed to the center hole of the driving gear 8 via a keyway. When the speed-regulating brushless motor 10 is energized, its rotor generates a rotating magnetic field that drives the output shaft to rotate. The power is then transferred to the driving gear 8 after being decelerated and torque-increased by the speed reducer 11. The driving gear 8, through meshing with the driven gear 9, transmits the rotational motion to the rotating shaft 4, thereby driving the bar to rotate synchronously.

[0040] Further, refer to Figure 1 The turntable for drilling the center hole of the bar further includes a station bearing 12 and a gear bearing 13, and the station bearing 12 is installed at the upper and lower ends of the rotating shaft 4, and the gear bearing 13 is installed at one end of the driving gear 8 close to the panel 1.

[0041] In one embodiment, station bearings 12 are positioned at both ends of the rotating shaft 4, and gear bearing 13 is positioned at the end of the driving gear 8 near the panel 1, coaxially fixed to the output shaft of the speed reducer 11. When the brushless speed-controlled motor 10 drives the driving gear 8 to rotate, the gear bearing 13 bears the axial load from the gear meshing, while the station bearing 12 bears the radial load generated by the rotation of the bar stock.

[0042] Further, refer to Figure 1 The turntable for drilling the center hole of the bar further includes a bearing seat 14 , wherein the station bearing 12 mounted at the lower end of the rotating shaft 4 is placed on the bearing seat 14 .

[0043] In one embodiment, the bearing seat 14 refers to a supporting structure for carrying the workstation bearing 12 , and is installed on the base plate 2 to support the workstation bearing 12 installed at the lower end of the rotating shaft 4 .

[0044] Furthermore, the bearing seat 12 is adjustably mounted on the base plate 2 .

[0045] In one embodiment, the bearing seat 12 is adjustably mounted on the base plate 2. By fine-tuning the bearing seat 12, the verticality of the rotating shaft 4 and the worktable placement surface of the base plate 2 can be adjusted, thereby better completing the drilling process.

[0046] Further, refer to Figure 1 The turntable for drilling the center hole of the bar further includes a positioning sleeve fixing screw 15, which fixes the positioning sleeve 5 to the rotating shaft 4.

[0047] In one embodiment, the locating sleeve retaining screw 15 is a fastener used to connect the locating sleeve 5 to the rotating shaft 4. During bar clamping, after the locating sleeve 5 is placed within the inner bore of the rotating shaft 4, the locating sleeve retaining screw 15 is tightened until the end of the screw abuts against the annular groove on the outer wall of the locating sleeve 5. As the rotating shaft 4 rotates with the drive mechanism, the radial pressure generated by the locating sleeve retaining screw 15 prevents the locating sleeve 5 from circumferential displacement or axial movement within the rotating shaft 4. When processing bars of different diameters, the locating sleeve 5 can be replaced with a matching one and the locating sleeve retaining screw 15 can be re-tightened to secure the locating sleeve 5.

[0048] Further, refer to Figure 1 The rotary table for drilling the center hole of the bar further includes a sealing ring 16 , which is mounted on the panel 1 and disposed at the connection between the panel 1 and the rotating shaft 4 .

[0049] In one embodiment, the sealing ring 16 is an annular seal used to close the gap between the rotating shaft 4 and the panel 1. Specifically, it can be made of rubber, silicone or polyurethane material. By forming an elastic sealing layer on the contact surface between the rotating shaft 4 and the panel 1, coolant or metal debris is prevented from entering the interior of the rotating shaft during processing.

[0050] After installing the sealing ring at the connection between panel 1 and rotating shaft 4, the axial vibration generated by the rotating shaft 4 during high-speed rotation is buffered by the elastic deformation of the sealing ring. At the same time, the sealing ring 16 forms a wrap-around seal around the edge of the through-hole of panel 1. When the bar rotates with the rotating shaft, external splashing coolant or metal debris generated by processing is blocked by the sealing ring, preventing it from entering the rotating shaft 4 through the gap between panel 1 and rotating shaft 4. This prevents the accumulation of debris, which may cause the rotating shaft to jam or the positioning sleeve to wear.

[0051] Further, refer to Figure 1 On the side of the rotating shaft 4 close to the bottom plate 3, the hole formed on the bottom plate 3 can be used to remove the waste generated by the bar processing, including slag removal and water drainage.

[0052] In summary, the present application discloses a rotary table for drilling center holes in bar stock, comprising a main body, a plurality of rotary axis stations arranged on the main body, and a rotary axis arranged on the rotary axis station, wherein the main body comprises a panel, a bottom plate, and a side plate, the rotary axis station vertically passes through the panel and bottom plate of the main body, the bar stock is vertically fixed inside the rotary axis, a positioning sleeve is provided between the inner wall of the rotary axis and the bar stock, the positioning sleeve is a replaceable positioning sleeve, and when the bar stock is drilled, the bar stock rotates with the rotation of the rotary axis and the positioning sleeve. By making the bar stock rotate synchronously with the rotary axis and the positioning sleeve during the processing, the error caused by the drill bit runout is actively offset, and the processing accuracy, especially the concentricity and verticality of the center hole, is effectively improved. This has the advantage of effectively improving the processing accuracy, especially the concentricity and verticality of the center hole. At the same time, the replaceable positioning sleeve can meet the processing requirements for bar stock of different sizes, thereby improving the versatility of processing.

[0053] The above is a detailed introduction to a rotary table for drilling center holes in bar stock provided in an embodiment of the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only intended to help understand the method and core concept of the present application. At the same time, for those skilled in the art, based on the concept of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application. Furthermore, for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A rotary table for drilling center holes in bar materials, characterized in that: include: A main body, several rotating shaft stations arranged on the main body and a rotating shaft arranged on the rotating shaft station, wherein the main body includes a panel, a bottom plate and a side plate, the rotating shaft station vertically penetrates the panel and the bottom plate of the main body, the rod is vertically fixed inside the rotating shaft, and a positioning sleeve is provided between the inner wall of the rotating shaft and the rod. The positioning sleeve is a replaceable positioning sleeve. When the rod is rotated, the rod rotates with the rotation of the rotating shaft and the positioning sleeve.

2. The rotary table for drilling center holes in bar materials according to claim 1, characterized in that: The positioning sleeve is placed into and fixed inside the rotating shaft from one side of the base plate.

3. The rotary table for drilling center holes in bar materials according to claim 1, characterized in that: The turntable for drilling a center hole in a bar further comprises a collet and a locking nut, wherein the collet is arranged at one end of the rotating shaft, and the locking nut fixes the bar by locking the collet.

4. The rotary table for drilling center holes in bar materials according to claim 1, characterized in that: The rotary table for drilling center holes in bar materials further comprises a driving gear and a driven gear, wherein the driven gear is fixed relative to the rotating shaft, the driving gear drives the driven gear to move, and the driven gear drives the rotating shaft to rotate.

5. The rotary table for drilling center holes in bar materials according to claim 4, characterized in that: The rotary table for drilling the center hole of the bar further includes a speed-regulating brushless motor and a reducer. The speed-regulating brushless motor is sequentially connected to the reducer and the driving gear from bottom to top. The speed-regulating brushless motor drives the reducer to work and thereby drives the driving gear to work.

6. The rotary table for drilling center holes in bar materials according to claim 4, characterized in that: The rotary table for drilling center holes in bar material further comprises a station bearing and a gear bearing, wherein the station bearing is mounted on the upper and lower ends of the rotating shaft, and the gear bearing is mounted on one end of the driving gear close to the panel.

7. The rotary table for drilling center holes in bar materials according to claim 6, characterized in that: The rotary table for drilling center holes of bar materials also includes a bearing seat, wherein: The station bearing installed at the lower end of the rotating shaft is placed on the bearing seat.

8. The rotary table for drilling center holes in bar materials according to claim 7, characterized in that: The bearing seat is adjustably mounted on the base plate.

9. The rotary table for drilling center holes in bar materials according to claim 7, characterized in that: The rotary table for drilling a center hole in a bar further comprises a positioning sleeve fixing screw, and the positioning sleeve fixing screw fixes the positioning sleeve to the rotating shaft.

10. The rotary table for drilling center holes in bar materials according to claim 1, characterized in that: The rotary table for drilling a center hole of a bar further comprises a sealing ring, which is mounted on the panel and arranged at the connection between the panel and the rotating shaft.

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