Method for processing multiple flange axial holes of long-axis type parts

Abstract

The application discloses a method for processing multiple flange axial holes of long-axis parts, which comprises the following steps: firstly, processing flange drilling, sequentially expanding and reaming the drilling, drilling through the drilling, removing the part excess between the flanges, sequentially performing secondary expanding and reaming on the drilled hole, and performing reaming on the through hole to ensure the size of the inner and outer flange holes; then, performing counter-bumping on the drilling on the flange, removing the processing excess of the inner flange hole through the counter-bumping, sequentially performing boring and reaming on the drilling on the flange, ensuring the position degree of the inner flange hole through the boring, ensuring the size precision requirement of the inner flange hole through the reaming, and obtaining the flange axial hole through the series of operations, thereby solving the problem that the inner flange axial hole cannot be processed due to the fact that the inner flange axial hole has a larger hole diameter than the outer flange axial hole and has high position degree requirement.

Description

Technical Field

[0001] This invention belongs to the field of machining, specifically a method for machining multiple flange axial holes in long shaft parts. Background Technology

[0002] The axial holes in flanges of long shaft-type parts are used for connection with other parts. Typically, these holes are drilled, reamed, bored, or boring on a machining center. However, if... Figure 1 As shown, there are two flanges at one end of a long shaft part. Each flange has a set of axial holes. The axial holes on the inner flange, which is farther from the end face of the part, have higher dimensional and positional accuracy. The pitch circle diameters of the two sets of axial holes are the same. The diameter of the axial hole on the inner flange, which is farther from the end face of the part, is larger than that on the outer flange, which is closer to the end face of the part. The distance between the pitch circle diameter of the axial holes and the outer circle of the part is small. The above method cannot be used to complete the machining of the axial holes on the inner flange. A special method must be used to complete the machining of the axial holes on both flanges.

[0003] Based on currently available information, research institutions in related fields have conducted studies on multiple methods for machining axial holes in flanges. These methods involve machining multiple axial holes in flanges using specialized cutting tools. For example, the patent "Reaming Method and Special Reamer for Coaxial Double Holes with Axial Obstruction" (Publication No.: CN104400124A, Applicant: Shaanxi Aircraft Industry (Group) Co., Ltd.) discloses a reaming method for coaxial double holes based on specialized cutting tools. This method utilizes the coaxial double holes of the two flanges to mutually position and support the tool, completing the reaming of the coaxial holes in the two flanges. This method can prevent the flange holes machined first from becoming elliptical or oblique, effectively avoiding damage to the flange hole that has been reamed first when machining the other flange hole, thus ensuring the coaxiality of the two flange holes.

[0004] However, this method has the following shortcomings: it limits the size of the flange hole, and can only achieve the same hole diameter or a larger diameter at the front and smaller diameter at the back (larger outer flange hole diameter, smaller inner flange hole diameter), and cannot achieve coaxial flange hole machining with a smaller diameter at the front and larger diameter at the back (smaller outer flange hole diameter, larger inner flange hole diameter); this method is not suitable for machining flange holes with a long flange distance; and this machining method cannot control and guarantee the positional accuracy of the flange hole. Summary of the Invention

[0005] This invention provides a method for machining multiple flange axial holes on long shaft parts, which solves the problems that existing machining methods are not suitable for machining flange holes that are far apart and cannot control and guarantee the positional accuracy of the flange holes.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A method for machining multiple flange axial holes in a long shaft-type part, comprising:

[0008] For machining flange holes, the holes are then enlarged and reamed in sequence.

[0009] Drill through the hole, remove the excess material between the flanges, and then perform secondary reaming and boring operations on the drilled hole in sequence.

[0010] Perform a reverse counterboring operation on the drilled holes on the flange;

[0011] The boreholes on the flange are bored and reamed in sequence to obtain the axial holes of the flange.

[0012] Preferably, a drill bit is used to drill holes in the flange.

[0013] Preferably, the flange is drilled using a drill bit, and the drilling depth is 15mm to 20mm.

[0014] Preferably, a reamer is used to enlarge the borehole.

[0015] Preferably, a reamer is used to ream the drilled hole.

[0016] Preferably, the tools used for the secondary reaming and boring operations are the same as those used for the primary reaming and boring operations.

[0017] Preferably, the excess material between the flanges is removed by machining.

[0018] Preferably, the reverse countersinking operation specifically involves passing the countersink cutter bar through the holes on the two flanges, installing the countersink cutter head, and countersinking the holes on the inner flange in the reverse direction to remove the machining allowance of the inner flange holes. After machining one hole, the cutter remains between the inner and outer flanges, the countersink cutter head is disassembled, the cutter bar is withdrawn, and the next hole is entered. This step is repeated until all the holes on the inner flange are countersinked.

[0019] Preferably, the boring operation is specifically performed as follows: the boring bar is passed through the outer flange hole and placed between the inner and outer flanges. The boring head is then installed, and the hole on the inner flange is bored in the forward direction to ensure the hole's position is within acceptable limits. After boring, the tool is placed between the inner and outer flanges, the boring head is removed, and the boring bar is withdrawn from the outer flange hole to proceed to the next hole. This process is repeated until all the holes on the inner flange are bored.

[0020] Preferably, the reaming operation specifically involves passing the reverse reamer shank through the holes on the two flanges, installing the reamer head, and reaming the holes on the inner flange to ensure the dimensional accuracy requirements of the holes. After reaming, the tool remains between the inner and outer flanges, the reamer head is removed, and the reamer shank is withdrawn from the outer flange hole to proceed to the next hole. This process is repeated until all the holes on the inner flange are reamed.

[0021] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a method for machining multiple flange axial holes of long shaft parts. First, the flange is drilled. Then, the drilled holes are enlarged and reamed in sequence to drill through the hole and remove the part allowance between the flanges. The drilled holes are then enlarged and reamed a second time. The through-hole reaming operation ensures the size of the inner and outer flange holes. Then, the drilled holes on the flange are countersunk to remove the machining allowance of the inner flange hole. The drilled holes on the flange are then bored and reamed in sequence. The boring operation ensures the positional accuracy of the inner flange hole, and the reaming operation ensures the dimensional accuracy requirements of the inner flange hole. Through this series of operations, the flange axial holes are obtained, solving the problem that the inner flange axial hole diameter is larger than the outer flange axial hole diameter and the positional accuracy requirement of the inner flange hole is high, which makes it impossible to machine the inner flange axial hole. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a multi-flange axial hole structure for long shaft-type parts in the background art;

[0023] Figure 2 This is a schematic diagram of the flange structure of the long shaft-type parts in the embodiment;

[0024] Figure 3 This is a schematic diagram of the structure before the axial hole of the flange of the long shaft part is machined in the embodiment;

[0025] Figure 4 This is a schematic diagram of step 1 in the embodiment for machining the axial hole of the flange of a long shaft part;

[0026] Figure 5 This is a schematic diagram of step 2 in the embodiment for machining the axial hole of the flange of a long shaft part;

[0027] Figure 6 This is a schematic diagram of step 3 in the embodiment for machining the axial hole of the flange of a long shaft part;

[0028] Figure 7 This is a schematic diagram of step 4 in the embodiment for machining the axial hole of the flange of a long shaft part;

[0029] Figure 8 This is a schematic diagram of step 5 in the embodiment for machining the axial hole of the flange of a long shaft part;

[0030] Figure 9 This is a schematic diagram of step 6 in the embodiment for machining the axial hole of the flange of a long shaft part;

[0031] Figure 10 This is a schematic diagram of step 7 in the embodiment for machining the axial hole of the flange of a long shaft part;

[0032] Figure 11This is a schematic diagram of step 8 in the embodiment for machining the axial hole of the flange of a long shaft part;

[0033] Figure 12 This is a schematic diagram of step 9 in the embodiment for machining the axial hole of the flange of a long shaft part;

[0034] Figure 13 This is a schematic diagram of step 10 in the embodiment for machining the axial hole of the flange of a long shaft part;

[0035] Figure 14 This is a flowchart of a method for machining multiple flange axial holes in a long shaft part according to the present invention;

[0036] Wherein: 1-long shaft workpiece, 2-long shaft inner flange, 3-long shaft outer flange, 4-counterfeiting cutter shank, 5-counterfeiting cutter head, 6-boring cutter shank, 7-boring cutter head, 8-reamer shank, 9-reamer head, 10-inner flange axial hole, 11-outer flange axial hole. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0043] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0044] like Figure 14 As shown, the present invention provides a method for machining multiple flange axial holes in a long shaft-type part, including:

[0045] S101 is used to drill flange holes, and the drill holes are then enlarged and reamed in sequence.

[0046] S102 drills through the hole, removes the excess material between the flanges, and then performs secondary reaming and boring operations on the drilled hole.

[0047] S103 performs a reverse counterboring operation on the drilled holes on the flange;

[0048] S104 sequentially performs boring and reaming operations on the drilled holes on the flange to obtain the axial holes of the flange.

[0049] Specifically:

[0050] Step 1: Drill holes using a drill bit, with a drilling depth of 15mm to 20mm;

[0051] Step 2: Enlarge the hole processed in Step 1 using a reamer;

[0052] Step 3: Use a reamer to machine the hole processed in step 2, ensuring the dimensional accuracy requirements of the hole are met;

[0053] Step 4: Using the hole processed in Step 3 as a guide hole, drill through the hole with a gun drill;

[0054] Step 5: Machining removes excess material between the two flanges;

[0055] Step 6: Enlarge the holes on both flanges;

[0056] Step 7: Hinge the holes on the two flanges to ensure the required dimensional accuracy of the holes;

[0057] Step 8: Pass the countersink cutter bar through the holes on the two flanges, install the countersink cutter head, and countersink the hole on the inner flange in the reverse direction to remove the machining allowance of the inner flange hole. After machining one hole, the tool stays between the inner and outer flanges, remove the countersink cutter head, withdraw the cutter bar, and enter the next hole. Repeat this step until all the holes on the inner flange are countersinked.

[0058] Step 9: Pass the boring bar holder through the outer flange hole and stop between the inner and outer flanges. Install the boring bar head and bore the hole on the inner flange in the forward direction, ensuring the hole position is required. After boring, the tool stops between the inner and outer flanges. Remove the boring bar head and withdraw the boring bar holder from the outer flange hole to the next hole. Repeat this step until all the holes on the inner flange are bored.

[0059] Step 10: Pass the reverse reamer shank through the holes on the two flanges, install the reamer head, and ream the hole on the inner flange, ensuring the dimensional accuracy of the hole. After reaming, the tool stays between the inner and outer flanges, remove the reamer head, and withdraw the reamer shank from the outer flange hole to the next hole. Repeat this step until all the holes on the inner flange are reamed.

[0060] After all the above steps are completed, all the holes on the two flanges of the long shaft will be machined.

[0061] Example:

[0062] This embodiment describes the machining of a long shaft-like part with two flanges. The part is 2100mm long and has two flanges. The inner flange is 424mm from the large end face of the part, and the two flanges are 144mm apart. The inner flange has a set of Ф21 axial holes with a positional tolerance of 0.1mm and a diameter tolerance of 0.018mm. The outer flange has a set of Ф14 axial holes. The pitch circle diameter of both sets of holes is Ф254mm. The outer diameter of the shaft body next to the flanges is Ф230mm. The part structure is shown in the attached figure. Figure 2 As shown. Traditional methods of drilling, reaming, boring, and boring from the outer flange cannot complete the machining of the Ф21 axial hole in the inner flange. Therefore, the method proposed in this invention is used. Before machining using this invention, the part has already been machined into an attached... Figure 3 The structure shown.

[0063] Step 1: Drill a hole using a Ф12.5 drill bit to a depth of 18mm, as shown in the attached image. Figure 4 As shown;

[0064] Step 2: Enlarge the hole drilled in Step 1 using a Ф13.4 reamer, as shown in the attached diagram. Figure 5 As shown;

[0065] Step 3: Use a Ф13.6 reamer to machine the hole machined in Step 2, ensuring the hole size is Ф13.6 + 0.05, as shown in the attached diagram. Figure 6 As shown;

[0066] Step 4: Using the Ф13.6+0.05 hole machined in Step 3 as the guide hole, drill through the hole with a Ф13.6 gun drill, as shown in the attached diagram. Figure 7 As shown;

[0067] Step 5: Machining removes excess material between the two flanges, as shown in the attached diagram. Figure 8 As shown;

[0068] Step 6: Use a Ф13.9 reamer to enlarge the holes on both flanges, as shown in the attached diagram. Figure 9 As shown;

[0069] Step 7: Use a Ф14.05 reamer to ream the holes on both flanges, ensuring that the dimensions of the inner and outer flange holes are within Ф14+0.1, as shown in the attached document. Figure 10 As shown;

[0070] Step 8: Pass the countersink cutter shank through the holes on both flanges, install the Ф20.6 reverse countersinking head, and reverse countersink the hole on the inner flange to remove the machining allowance. After machining one hole, leave the cutter between the inner and outer flanges, remove the countersinking head, withdraw the cutter shank, and move to the next hole. Repeat this step until all holes on the inner flange are reverse countersinked. A machining diagram is attached. Figure 11 As shown;

[0071] Step 9: Pass the boring bar holder through the outer flange hole and stop between the inner and outer flanges. Install the Ф20.9 boring bar head and bore the hole on the inner flange in the forward direction, ensuring the Ф0.1 positional accuracy requirement of the inner flange hole. After boring, stop the tool between the inner and outer flanges, remove the boring bar head, and withdraw the boring bar holder from the outer flange hole to proceed to the next hole. Repeat this step until all holes on the inner flange are bored. A machining diagram is attached. Figure 12 As shown;

[0072] Step 10: Pass the reamer shank through the outer flange hole, install the Ф21 reamer head, and ream the hole on the inner flange in the reverse direction, ensuring the dimensional accuracy requirement of Ф21+0.018 for the inner flange hole. After reaming, the tool rests between the inner and outer flanges. Remove the reamer head, and the reamer shank withdraws from the outer flange hole to proceed to the next hole. Repeat this step until all holes on the inner flange are reamed. A machining diagram is attached. Figure 13 As shown.

[0073] Although embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments and application fields described above. The specific embodiments described above are merely illustrative and instructive, and not restrictive. Those skilled in the art, guided by the specification, can make many other modifications without departing from the scope of the claims of the present invention, and all of these modifications are within the scope of protection of the present invention.

Claims

1. A method for machining multiple flange axial holes in a long shaft-type part, characterized in that, include: For machining flange holes, the holes are then enlarged and reamed in sequence. Drill through the hole, remove the excess material between the flanges, and then perform secondary reaming and boring operations on the drilled hole in sequence. Perform a reverse countersinking operation on the drilled holes on the flange; The boreholes on the flange are sequentially bored and reamed to obtain the axial holes in the flange; The reverse countersinking operation is specifically as follows: pass the countersinking cutter bar through the holes on the two flanges, install the countersinking cutter head, and reverse countersink the hole on the inner flange to remove the machining allowance of the inner flange hole. After machining one hole, the cutter stays between the inner and outer flanges, the countersinking cutter head is removed, the cutter bar is withdrawn, and the next hole is entered. This step is repeated until all the holes on the inner flange are reverse countersinked. The boring operation is specifically as follows: the boring bar is passed through the outer flange hole and placed between the inner and outer flanges. The boring head is installed, and the hole on the inner flange is bored in the forward direction to ensure the position of the hole. After boring is completed, the tool is placed between the inner and outer flanges. The boring head is removed, and the boring bar is withdrawn from the outer flange hole to enter the next hole for machining. This step is repeated until all the holes on the inner flange are bored. The reaming operation involves passing the reverse reamer shank through the holes on both flanges, attaching the reamer head, and reaming the holes on the inner flange to ensure the required dimensional accuracy. After reaming, the tool remains between the inner and outer flanges. The reamer head is then removed, and the reamer shank exits from the outer flange hole to proceed to the next hole. This process is repeated until all the holes on the inner flange are reamed.

2. The method for machining multiple flange axial holes in a long shaft-type part according to claim 1, characterized in that, The flange is drilled using a drill bit.

3. The method for machining multiple flange axial holes in a long shaft-type part according to claim 2, characterized in that, Flanges are drilled using a drill bit, with a drilling depth of 15mm to 20mm.

4. The method for machining multiple flange axial holes in a long shaft-type part according to claim 1, characterized in that, A reamer is used to enlarge the borehole.

5. The method for machining multiple flange axial holes in a long shaft-type part according to claim 1, characterized in that, A reamer is used to ream the drilled hole.

6. The method for machining multiple flange axial holes in a long shaft-type part according to claim 1, characterized in that, The tools used for the secondary reaming and boring operations are the same as those used for the primary reaming and boring operations.

7. The method for machining multiple flange axial holes in a long shaft-type part according to claim 1, characterized in that, The excess material between the flanges is removed by machining.

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