Annular workpiece radial hole inner port chamfering device

Abstract

The invention discloses a chamfering device for an inner port of a radial hole of an annular workpiece. The chamfering device comprises a bottom plate, a workpiece positioning assembly, a drill bit mounting assembly, a chamfering drill bit and a driving connecting rod made of a magnetic material. The workpiece positioning assembly comprises a V-shaped block and a positioning pin, and the positioning pin is used for being inserted into an outer port of a radial hole of the annular workpiece to achieve positioning; the drill bit mounting assembly comprises a support and a clamping rod, the clamping rod is suspended above the positioning pin, and the end of the clamping rod is provided with a magnet and a vertical through hole; the chamfering drill bit penetrates through the vertical through hole in a clearance fit mode and is kept in a suspended state through the adsorption force of the magnet, and the lower end of the chamfering drill bit is aligned to the positioning pin; the lower end of the driving connecting rod is a non-circular section, and a matching hole is formed in the top of the chamfering drill bit. The device is simple in structure, convenient to adjust, reusable, simple and convenient in operation flow and low in production cost, the single-piece machining time can be remarkably shortened, and efficient and accurate chamfering of the inner port of the radial hole of the annular workpiece is achieved.

Description

Technical Field

[0001] This invention relates to a workpiece chamfering device, specifically to a device for chamfering the inner port of a radial hole in a ring-shaped workpiece. Background Technology

[0002] With the increasing demands on the machining of ring-shaped workpieces, chamfering and deburring the inner ends of the radial holes on their sidewalls has become an indispensable process in precision machining. Ring-shaped workpieces typically have multiple radial holes machined into their sidewalls, usually an even number and symmetrically distributed. After the radial holes are machined into the sidewalls of a ring-shaped workpiece, burrs inevitably form at the intersection of the inner ends of these holes and the inner diameter surface of the workpiece. Traditional manual or mechanical deburring methods have significant limitations: if operated from the outside of the workpiece, conventional chamfering tools cannot penetrate the slender radial holes and thus cannot reach the inner ends; if attempted from the inside of the workpiece, the limited internal space makes operation extremely inconvenient and precision difficult to control.

[0003] In existing technologies, methods such as fluid polishing, electrolytic polishing, and magnetic polishing are commonly used to remove burrs from the inner ends of radial holes in annular workpieces. However, these methods generally suffer from problems such as complex equipment, high costs, and long processing cycles, making them difficult to meet the requirements of mass production. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a chamfering device for the inner port of the radial hole of an annular workpiece, which is simple in structure, convenient in adjustment, reusable, easy to operate, low in production cost, and can significantly shorten the processing time of a single piece, so as to achieve efficient and accurate chamfering of the inner port of the radial hole of an annular workpiece.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a chamfering device for the inner port of the radial hole of an annular workpiece, comprising a base plate, a workpiece positioning assembly, a drill bit mounting assembly, a chamfering drill bit, and a drive connecting rod made of magnetic material; The workpiece positioning assembly includes a V-block and a positioning pin erected on the V-block. The V-block is fixed to one side of the base plate. The V-block is used to support the annular workpiece. The positioning pin is used to insert into the outer port of a radial hole of the annular workpiece to achieve positioning. The drill bit mounting assembly includes a bracket and a clamping rod mounted on the bracket. The bracket is fixed to the other side of the base plate, and the clamping rod is suspended above the positioning pin. The end of the clamping rod is provided with a magnet and has a vertical through hole. The chamfered drill bit is inserted into the vertical through hole with a clearance fit. The chamfered drill bit is kept suspended by the attraction force of the magnet, and the lower end of the chamfered drill bit is aligned with the positioning pin. The lower end of the drive connecting rod is a non-circular cross-section section, and the top of the chamfered drill bit is provided with a mating hole that matches the non-circular cross-section section. The drive connecting rod is configured such that its lower end can pass through another radial hole of the annular workpiece and then be inserted into the mating hole to transmit torque, and its top end is used to connect to an external drive device.

[0006] When using the chamfering device of this invention, first place the annular workpiece to be chamfered on the V-block, adjust the position of the annular workpiece so that the locating pin is inserted into the outer port of one radial hole of the annular workpiece, thereby achieving circumferential and axial positioning of the annular workpiece; then connect the top end of the drive connecting rod to the external drive device, and then operate the external drive device to move the drive connecting rod downwards, so that the lower end of the drive connecting rod passes through another radial hole of the annular workpiece and is inserted into the mating hole at the top of the chamfering drill bit; thereafter, start the external drive device, which drives the chamfering drill bit to rotate through the drive connecting rod, and continues to move the drive connecting rod downwards. The chamfering drill bit is pushed downwards until its cutting edge contacts the inner port of the radial hole where the locating pin is located, initiating chamfering and deburring. After chamfering, the drive connecting rod is moved upwards. During this process, due to the attraction of the magnet or the magnetic force generated by the magnetization of the drive connecting rod itself, the chamfering drill bit is attracted and moves upwards with the drive connecting rod. When the chamfering drill bit rises to its top and contacts the inner diameter surface of the annular workpiece, the chamfering drill bit separates from the drive connecting rod. The drive connecting rod continues to move upwards until it is removed from the annular workpiece, allowing the workpiece with the chamfered inner port of one radial hole to be removed. Repeating the above steps allows for the chamfering of the inner ports of the remaining radial holes on the annular workpiece.

[0007] Preferably, the sidewalls of the annular workpiece are machined with an even number of symmetrically distributed radial holes. This design is a common structure for annular workpieces and a typical application scenario where this chamfering device achieves its best effect. Under this structure, firstly, the symmetrical hole distribution allows the annular workpiece to be positioned and driven sequentially using each set of symmetrical radial holes after a single clamping and positioning. This allows for continuous and sequential chamfering of the inner ports of all radial holes without the need for mid-process re-alignment, greatly improving the efficiency and consistency of batch processing. Secondly, the even number and symmetrical hole system ensures balanced force during processing, effectively reducing workpiece fretting or vibration that may be caused by radial torque imbalance, thereby further guaranteeing the dimensional accuracy and surface quality of the chamfering process.

[0008] Preferably, the end of the clamping rod has a mounting hole, the magnet is embedded in the mounting hole, and the vertical through hole is connected to the mounting hole. In this design, the magnet has high magnetic force utilization and good centering, ensuring the stability of the chamfered drill bit suspension.

[0009] Preferably, the bracket has two U-shaped holes, and the clamping rod is fixed to the bracket by two sets of bolt assemblies, with the screw of each set of bolt assemblies passing through one of the U-shaped holes. The design of the U-shaped holes and bolt assemblies allows for vertical adjustment of the clamping rod's installation position to flexibly match ring-shaped workpieces of different diameters or sizes, thus improving the versatility and applicability of the device.

[0010] Preferably, the drive connecting rod is a hexagonal bar, and the mating hole is a countersunk hexagonal hole. The distance between opposite sides of the hexagonal bar is smaller than the diameter of a single radial hole, and the hexagonal bar and the countersunk hexagonal hole are clearance-fitted. As a standard component, the hexagonal bar, in conjunction with the countersunk hexagonal hole, achieves smooth torque transmission. It is simple to manufacture, inexpensive, and easy to maintain and replace.

[0011] Preferably, the V-block has a V-groove with an upper opening, the upper part of the locating pin is exposed in the V-groove, the exposed length of the chamfering drill bit in the V-groove is less than the depth of a single radial hole, and the upper part of the locating pin is interference-fitted with a radial hole. The clamping and positioning of the annular workpiece is achieved through the combination of the V-groove and the locating pin. This method is simple in structure, convenient in operation, and reliable in positioning, effectively reducing clamping time and minimizing clamping damage or scratches to the outer surface or key mating surfaces of the annular workpiece, ensuring the surface quality of the annular workpiece before and after chamfering.

[0012] Preferably, the external drive device is a bench drill, radial drill, handheld drill, or electric wrench. These devices are common and readily available standardized power units in workshops, offering flexible and convenient operation. They are highly compatible with this chamfering device, significantly reducing the user's equipment investment costs and lowering the barrier to entry. Depending on the processing scenario, workpiece size, or batch requirements, users can flexibly select the most suitable external drive device. For example, a bench drill can be used for batch processing to improve efficiency, while a handheld drill can be used for on-site repairs to adapt to space constraints, thereby greatly enhancing the application flexibility and scenario adaptability of this chamfering device.

[0013] Compared with existing technologies, the present invention has the following advantages: The chamfering device for the inner port of the radial hole of the annular workpiece of the present invention has the characteristics of simple structure, convenient adjustment, and reusability. It can be quickly adapted to the workpiece size and can be clamped and processed in a conventional workshop environment. Its operation process is simple, the production cost is low, and it can significantly shorten the processing time of a single piece, thereby effectively reducing the overall processing cost and realizing efficient and accurate chamfering of the inner port of the radial hole of the annular workpiece. Attached Figure Description

[0014] Figure 1 A front view of the chamfering device in an embodiment where a ring-shaped workpiece is clamped; Figure 2 A top view of the chamfering device in an embodiment where a ring-shaped workpiece is clamped; Figure 3 for Figure 2 Sectional view of AA; Figure 4 A partial isometric view of the chamfering device in an embodiment where a ring-shaped workpiece is clamped; Figure 5 This is a diagram showing the usage state of the chamfering device in the embodiment; Figures 1-5 The specific reference numerals in the attached figures are as follows: 1-Base plate, 21-V-block, 22-Positioning pin, 23-V-groove, 31-Bracket, 32-Clamping rod, 33-Hex socket head cap screw, 34-Magnet, 35-Vertical through hole, 36-Mounting hole, 37-U-hole, 38-Bolt assembly, 4-Chamfered drill bit, 41-Hex socket countersunk hole, 5-Hexagonal bar, 6-Ring workpiece, 61-Radial hole, 7-Bench drill, 71-Chuck, 72-Disc, 73-Worktable. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Components or structures not limited in this invention employ conventional techniques in the art.

[0016] The embodiment of the annular workpiece radial hole inner port chamfering device, such as Figures 1-4 As shown, it includes a base plate 1, a workpiece positioning assembly, a drill bit mounting assembly, a chamfering drill bit 4, and a drive connecting rod made of magnetic material.

[0017] The workpiece positioning assembly includes a V-block 21 and a positioning pin 22 erected on the V-block 21. The V-block 21 is welded to one side of the base plate 1. The V-block 21 is used to support the annular workpiece 6 to be chamfered. The side wall of the annular workpiece 6 is machined with four radial holes 61 that are symmetrically distributed. The V-block 21 has a V-groove 23 with an upper opening. The upper part of the positioning pin 22 is exposed in the V-groove 23. The exposed length of the chamfering drill bit 4 in the V-groove 23 is less than the depth of a single radial hole 61. The upper part of the positioning pin 22 is interference-fitted with a radial hole 61. The positioning pin 22 is used to insert into the outer port of a radial hole 61 of the annular workpiece 6 to achieve positioning.

[0018] The drill bit mounting assembly includes a bracket 31 and a clamping rod 32 mounted on the bracket 31. The bracket 31 is fixed to the other side of the base plate 1 by two hexagonal socket head cap screws 33. The clamping rod 32 is suspended above the positioning pin 22. The end of the clamping rod 32 is provided with a magnet 34 and has a vertical through hole 35. Specifically, the end of the clamping rod 32 has a mounting hole 36, and the magnet 34 is embedded in the mounting hole 36. The vertical through hole 35 is connected to the mounting hole 36. The chamfered drill bit 4 is attracted to the vertical through hole 35 of the clamping rod 32 by the magnet 34 to prevent it from falling off. The bracket 31 has two U-shaped holes 37. The clamping rod 32 is fixed to the bracket 31 by two sets of bolt assemblies 38. The screw of each set of bolt assemblies 38 passes through one U-shaped hole 37.

[0019] The chamfered drill bit 4 is inserted into the vertical through hole 35 with a clearance fit. The chamfered drill bit 4 is kept suspended by the attraction force of the magnet 34, and the lower end of the chamfered drill bit 4 is aligned with the positioning pin 22.

[0020] In this embodiment, a bench drill 7 is used as an external drive device, and the drive connecting rod is a hexagonal bar 5. The top of the chamfered drill bit 4 is machined with an internal hexagonal countersunk hole 41 by electrical discharge machining. The distance between opposite sides of the hexagonal bar 5 is smaller than the diameter of a single radial hole 61. The hexagonal bar 5 is configured such that its lower end can pass through another radial hole 61 of the annular workpiece 6 and then be inserted into the internal hexagonal countersunk hole 41 with a clearance fit to transmit torque. Its top end is connected to the chuck 71 of the bench drill 7.

[0021] Before using the chamfering device, place the entire chamfering device on the worktable 73 of the bench drill 7. In use, first place the annular workpiece 6 to be chamfered on the V-block 21, adjust the position of the annular workpiece 6 so that the locating pin 22 is inserted into the outer port of one radial hole 61 of the annular workpiece 6, achieving circumferential and axial positioning of the annular workpiece 6. At this point, the annular workpiece 6 is clamped. Then connect the top end of the hexagonal bar 5 to the chuck 71 of the bench drill 7, as shown... Figure 5As shown, the disc 72 of the bench drill 7 is manipulated to move the hexagonal bar 5 downwards, so that the lower end of the hexagonal bar 5 passes through another radial hole 61 of the annular workpiece 6 and is inserted into the internal hexagonal countersunk hole 41 at the top of the chamfering drill bit 4. Then, the bench drill 7 is started, and the chamfering drill bit 4 is rotated by the hexagonal bar 5. The hexagonal bar 5 continues to move downwards and pushes the chamfering drill bit 4 downwards until the cutting edge of the chamfering drill bit 4 contacts the inner port of the radial hole 61 where the locating pin 22 is located, and the chamfering and deburring begins. After the chamfering is completed, the hexagonal bar 5 is moved upwards. During this process, due to the attraction of the magnet 34 or the magnetic force generated by the magnetization of the hexagonal bar 5 itself, the chamfering drill bit 4 is attracted and moves upwards with the hexagonal bar 5. When the chamfering drill bit 4 rises to the point where its top contacts the inner diameter surface of the annular workpiece 6, the chamfering drill bit 4 separates from the hexagonal bar 5. The hexagonal bar 5 continues to move upwards until it is removed from the annular workpiece 6, and the workpiece with the chamfered inner port of one radial hole 61 can be taken out. By repeating the above steps, the inner ports of the remaining radial holes 61 on the annular workpiece 6 can be chamfered one by one in a highly efficient and precise manner, significantly shortening the processing time for a single piece.

Claims

1. A chamfering device for the inner end of a radial hole in a ring-shaped workpiece, characterized in that, Includes a base plate, workpiece positioning assembly, drill bit mounting assembly, chamfering drill bit, and drive connecting rod made of magnetic material; The workpiece positioning assembly includes a V-block and a positioning pin erected on the V-block. The V-block is fixed to one side of the base plate. The V-block is used to support the annular workpiece. The positioning pin is used to insert into the outer port of a radial hole of the annular workpiece to achieve positioning. The drill bit mounting assembly includes a bracket and a clamping rod mounted on the bracket. The bracket is fixed to the other side of the base plate, and the clamping rod is suspended above the positioning pin. The end of the clamping rod is provided with a magnet and has a vertical through hole. The chamfered drill bit is inserted into the vertical through hole with a clearance fit. The chamfered drill bit is kept suspended by the attraction force of the magnet, and the lower end of the chamfered drill bit is aligned with the positioning pin. The lower end of the drive connecting rod is a non-circular cross-section section, and the top of the chamfered drill bit is provided with a mating hole that matches the non-circular cross-section section. The drive connecting rod is configured such that its lower end can pass through another radial hole of the annular workpiece and then be inserted into the mating hole to transmit torque, and its top end is used to connect to an external drive device.

2. The chamfering device for the inner port of the radial hole of an annular workpiece according to claim 1, characterized in that, The sidewall of the annular workpiece is machined with an even number of radial holes that are symmetrically distributed.

3. The chamfering device for the inner port of the radial hole of an annular workpiece according to claim 1, characterized in that, The clamping rod has a mounting hole at its end, the magnet is embedded in the mounting hole, and the vertical through hole is connected to the mounting hole.

4. The chamfering device for the inner port of the radial hole of an annular workpiece according to claim 1, characterized in that, The bracket has two U-shaped holes, and the clamping rod is fixed to the bracket by two sets of bolt assemblies, with the screw of each set of bolt assemblies passing through one of the U-shaped holes.

5. The chamfering device for the inner end of the radial hole of an annular workpiece according to claim 1, characterized in that, The drive connecting rod is a hexagonal bar, the mating hole is an internal hexagonal countersunk hole, the distance between opposite sides of the hexagonal bar is smaller than the diameter of a single radial hole, and the hexagonal bar and the internal hexagonal countersunk hole are clearance fitted.

6. The chamfering device for the inner port of the radial hole of an annular workpiece according to claim 1, characterized in that, The V-block has a V-groove with an upper opening, the upper part of the locating pin is exposed in the V-groove, the exposed length of the chamfered drill bit in the V-groove is less than the depth of a single radial hole, and the upper part of the locating pin is interference-fitted with a radial hole.

7. The chamfering device for the inner port of the radial hole of an annular workpiece according to claim 1, characterized in that, The external drive device is a bench drill, radial drill, hand drill, or electric wrench.

Images