Machining process of shaft lever made of high-temperature alloy and used for drilling equipment

Abstract

The invention relates to a machining process of a shaft lever made of a high-temperature alloy material and used for drilling equipment. Comprising the following steps of machining a shaft hole and roughly turning an outer circle, milling a key groove with a fixed rotation direction and then dotting a hole position of a process hole, drilling the process hole, roughly turning the outer circle, straightening, installing a plug and machining an eccentric center hole, machining an eccentric outer circle, straightening, roughly milling a process groove, straightening, finely turning a concentric outer circle, straightening, finely turning the eccentric outer circle, straightening and finely milling an appearance structure. And straightening, finish-milling the front and rear end faces, machining the threaded hole, the through hole and the blind hole, and reaming the first and second process holes. The machining stability in the production process is guaranteed. The method is suitable for large-batch rapid machining of products, the machining efficiency of the parts is effectively improved, and the reject ratio in the production process is effectively reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of machining, and specifically discloses a machining process for a shaft rod made of high-temperature alloy for drilling equipment. Background Art

[0002] At present, the length of the shaft for drilling equipment is 1750-1800mm, the outer diameter of the eccentric part with the shaft hole is 95-100mm, and the outer diameter of the coaxial part with the shaft hole is 115-120mm. The shaft for drilling equipment made of high-temperature alloy can work for a long time under high temperature above 600℃ and certain stress, and has high high-temperature strength, good oxidation resistance and corrosion resistance, good fatigue performance, fracture toughness and other comprehensive properties. It is widely used in the energy and oil and gas fields. However, the material properties of high-temperature alloy itself that are difficult to process and the thin-walled, deep-hole eccentric processing of the shaft for drilling equipment are extremely easy to deform, which makes this product extremely difficult to process. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a processing technology for a shaft rod made of high-temperature alloy for drilling equipment.

[0004] According to the technical solution provided by the present invention, the processing technology of the shaft rod for drilling equipment made of high-temperature alloy material includes the following steps: S1. Take a cylindrical long shaft blank, first machine an axial hole that penetrates the front and rear end surfaces of the long shaft blank, and then rough-turn the outer circle of the long shaft blank concentric with the axial hole; S2, firstly milling a first keyway of a fixed rotation direction at the front end of the long axis blank along its diameter direction, the first keyway is L-shaped, and the first keyway passes through the wall at both ends of the front end of the long axis blank in the diameter direction, and then marking the positions of two first process holes and one second process hole on the front end surface of the long axis blank; S3, determining the rotation direction of the long-axis blank by means of the first keyway, and drilling two first process holes and one second process hole by means of a gun drill according to the pointed out first process holes and second process hole positions; S4, rough turning the outer circle of the long shaft blank concentric with the shaft hole; S5. Check the runout at certain intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle. Use a press to calibrate the runout of the bent and deformed long shaft blank until it is within the specified range. S6, install the pre-processed plug into the front end axial hole of the long shaft blank, and process a pin hole on the plug and the front end surface of the long shaft blank. The pin hole processed on the plug is a through hole, and the pin hole processed on the front end surface of the long shaft blank is a blind hole. Then, install the pin into the pin hole of the plug and the pin hole processed on the front end surface of the long shaft blank. Finally, drill a top hole on the plug that is eccentrically arranged with the axial hole of the long shaft blank. The top hole facilitates the subsequent processing of the eccentric outer circle of the long shaft blank. S7, using the top hole drilled on the plug as the rotation center, machining an eccentric outer circle on the long shaft blank; S8. Check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle. Use a press to calibrate the runout of the bent and deformed long shaft blank until it is within the specified range. S9, taking the axial hole of the long-axis blank as the rotation center, roughly milling a process groove on the outer circle of the long-axis blank; S10, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to calibrate the runout of the bent and deformed long-axis blank until it is within the specified range; S11, taking the axial hole of the long-axis blank as the rotation center, finishing turning the outer circle of the long-axis blank concentric with the axial hole; S12, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to calibrate the runout of the bent and deformed long shaft blank until it is within the specified range; S13, taking the top hole drilled on the plug as the rotation center, finish turning the outer circle of the long shaft blank eccentric to the shaft hole; S14, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to correct the runout of the bent and deformed long shaft blank until it is within the specified range; S15, fine milling an outer shape structure, a fine milling process groove, and a first threaded hole located in the process groove on the outer circle of the long shaft blank which is concentric and eccentric with the shaft hole; S16, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to correct the runout of the bent and deformed long shaft blank until it is within the specified range; S17, precision milling the front end face and the rear end face of the long shaft blank, processing the second threaded hole, the through hole and the blind hole on the front end face and the rear end face of the long shaft blank, coaxially expanding the front ends of the two first process holes, and eccentrically expanding the front end of the second process hole with the drill sleeve to obtain a finished shaft rod for drilling equipment.

[0005] Preferably, in step S5, a press is used to calibrate the runout of the bent and deformed long-axis blank to within 0.5 mm.

[0006] Preferably, in steps S8, S10, S12, S14 and S16, a press is used to calibrate the runout of the bent and deformed long-axis blank to within 0.12 mm.

[0007] Preferably, in step S15, the outer shape structure includes a countersunk hole, a U-shaped groove and a second keyway.

[0008] The present invention ensures the processing stability of the production process, is suitable for mass rapid processing of products, effectively improves the processing efficiency of such parts, and effectively reduces the unqualified rate of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is the front view of the finished shaft rod for drilling equipment.

[0010] Figure 2 This is an enlarged left view of the finished shaft rod for drilling equipment.

[0011] Figure 3 This is an enlarged right view of the finished shaft rod for drilling equipment. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0013] Example 1 A processing technology for a shaft rod for drilling equipment made of high-temperature alloy, the processing technology comprising the following steps: S1. Take a cylindrical long shaft blank, firstly process an axial hole 1.1 penetrating the front and rear end surfaces of the long shaft blank, and then rough-turn the outer circle of the long shaft blank concentric with the axial hole; S2, firstly milling a first keyway 2.1 of a fixed rotation direction at the front end of the long axis blank along its diameter direction, the first keyway 2.1 is L-shaped, and the first keyway 2.1 runs through the wall at both ends of the front end of the long axis blank in the diameter direction, and then marking the positions of two first process holes and one second process hole on the front end surface of the long axis blank; S3, determining the rotation direction of the long-axis blank by means of the first keyway 1.1, and drilling two first process holes 3.1 and one second process hole 3.2 by means of a gun drill according to the pointed out first process holes and second process hole positions; S4, rough turning the outer circle of the long shaft blank concentric with the shaft hole; S5. Check the runout at certain intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle. Use a press to calibrate the runout of the bent and deformed long shaft blank until it is within the specified range. S6, install the pre-processed plug into the front end axial hole of the long shaft blank, and process a pin hole on the plug and the front end surface of the long shaft blank. The pin hole processed on the plug is a through hole, and the pin hole processed on the front end surface of the long shaft blank is a blind hole. Then, install the pin into the pin hole of the plug and the pin hole processed on the front end surface of the long shaft blank. Finally, drill a top hole on the plug that is eccentrically arranged with the axial hole of the long shaft blank. The top hole facilitates the subsequent processing of the eccentric outer circle of the long shaft blank. S7, using the top hole drilled on the plug as the rotation center, machining an eccentric outer circle on the long shaft blank; S8. Check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle. Use a press to calibrate the runout of the bent and deformed long shaft blank until it is within the specified range. S9, taking the axial hole of the long-axis blank as the rotation center, roughly milling a process groove on the outer circle of the long-axis blank; S10, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to calibrate the runout of the bent and deformed long-axis blank until it is within the specified range; S11, taking the axial hole of the long-axis blank as the rotation center, finishing turning the outer circle of the long-axis blank concentric with the axial hole; S12, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to calibrate the runout of the bent and deformed long shaft blank until it is within the specified range; S13, taking the top hole drilled on the plug as the rotation center, finish turning the outer circle of the long shaft blank eccentric to the shaft hole; S14, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to correct the runout of the bent and deformed long shaft blank until it is within the specified range; S15, fine milling the outer shape structure (including countersunk hole, U-shaped groove and second keyway etc.) on the outer circle of the long shaft blank which is concentric and eccentric with the shaft hole, fine milling the process groove 4.1 and the first threaded hole 5.1 located in the process groove 4.1; S16, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to correct the runout of the bent and deformed long shaft blank until it is within the specified range; S17, precision milling the front end face and the rear end face of the long shaft blank, processing the second threaded hole 6.1, the through hole 7.1 and the blind hole 8.1 on the front end face and the rear end face of the long shaft blank, coaxially expanding the front ends of the two first process holes 3.1, and eccentrically expanding the front end of the second process hole 3.2 with the use of a drill sleeve to obtain a finished shaft rod for drilling equipment.

[0014] The working principle and advantages of the present invention are as follows: 1. Drilling the shaft hole after fine machining will inevitably cause the deformation of the dimensional characteristics of the fine machining part to exceed the error range. Therefore, the present invention adjusts the drilling of the shaft hole to the first part of the whole process flow. After the shaft hole is drilled, the subsequent processing steps are carried out around the shaft hole, which effectively avoids the influence of the shaft hole processing on the overall size of the part.

[0015] 2. When machining the eccentric outer circle of the shaft rod for high-temperature alloy drilling equipment, the part is long as a whole, has large runout, and is difficult to machine. Therefore, it is necessary to use the lathe's built-in center auxiliary machining and use the plug for assistance to machine an eccentric center hole on the plug to prepare for subsequent eccentric machining, effectively ensuring the machining of the eccentric outer circle.

[0016] 3. The shaft rods used in high-temperature alloy drilling equipment are very prone to bending and deformation during the processing, especially during milling and the process of removing large excesses. Therefore, straightening procedures are constantly interspersed in the process route to ensure that the runout of the parts before processing is always qualified, effectively avoiding the situation where the shaft hole position becomes worse and worse during the processing.

[0017] 4. Use an ultrasonic wall thickness gauge to detect the minimum wall thickness of the parts before each turning process, and adjust the lathe jaws based on the comparison between the measured value and the theoretical value, effectively ensuring the position accuracy of the shaft hole in each turning process.

[0018] 5. When fine milling the front end face, rear end face, second threaded hole, through hole and blind hole, the stepped hole part of the second process hole 3.2 has an eccentric structure with the main part of the second process hole 3.2. The end face of the stepped hole part of the second process hole 3.2 is far away from the front end face of the part. It is difficult to ensure the processing size by directly using a tool. Therefore, a drill sleeve is used for auxiliary processing, which can ensure the processing size to a certain extent.

[0019] Therefore, the use of the process of the present invention to produce shaft rods for high-temperature alloy drilling equipment can fully meet the various characteristics of the shaft rods for drilling equipment, and effectively avoid the influence of part deformation on processing and final products, and can be widely promoted in the processing of similar parts.

[0020] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A processing technology for a shaft rod of a high temperature alloy for drilling equipment, characterized in that The processing technology includes the following steps: S1. Take a cylindrical long shaft blank, first machine an axial hole that penetrates the front and rear end surfaces of the long shaft blank, and then rough-turn the outer circle of the long shaft blank concentric with the axial hole; S2, firstly milling a first keyway of a fixed rotation direction at the front end of the long axis blank along its diameter direction, the first keyway is L-shaped, and the first keyway passes through the wall at both ends of the front end of the long axis blank in the diameter direction, and then marking the positions of two first process holes and one second process hole on the front end surface of the long axis blank; S3, determining the rotation direction of the long-axis blank by means of the first keyway, and drilling two first process holes and one second process hole by means of a gun drill according to the pointed out first process holes and second process hole positions; S4, rough turning the outer circle of the long shaft blank concentric with the shaft hole; S5. Check the runout at certain intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle. Use a press to calibrate the runout of the bent and deformed long shaft blank until it is within the specified range. S6, install the pre-processed plug into the front end axial hole of the long shaft blank, and process a pin hole on the plug and the front end surface of the long shaft blank. The pin hole processed on the plug is a through hole, and the pin hole processed on the front end surface of the long shaft blank is a blind hole. Then, install the pin into the pin hole of the plug and the pin hole processed on the front end surface of the long shaft blank. Finally, drill a top hole on the plug that is eccentrically arranged with the axial hole of the long shaft blank. The top hole facilitates the subsequent processing of the eccentric outer circle of the long shaft blank. S7, using the top hole drilled on the plug as the rotation center, machining an eccentric outer circle on the long shaft blank; S8. Check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle. Use a press to calibrate the runout of the bent and deformed long shaft blank until it is within the specified range. S9, taking the axial hole of the long-axis blank as the rotation center, roughly milling a process groove on the outer circle of the long-axis blank; S10, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to calibrate the runout of the bent and deformed long-axis blank until it is within the specified range; S11, taking the axial hole of the long-axis blank as the rotation center, finishing turning the outer circle of the long-axis blank concentric with the axial hole; S12, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to calibrate the runout of the bent and deformed long shaft blank until it is within the specified range; S13, taking the top hole drilled on the plug as the rotation center, finish turning the outer circle of the long shaft blank eccentric to the shaft hole; S14, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to correct the runout of the bent and deformed long shaft blank until it is within the specified range; S15, fine milling an outer shape structure, a fine milling process groove, and a first threaded hole located in the process groove on the outer circle of the long shaft blank which is concentric and eccentric with the shaft hole; S16, check the runout at intervals and use an ultrasonic wall thickness gauge to detect the wall thickness difference of the cut circle, and use a press to correct the runout of the bent and deformed long shaft blank until it is within the specified range; S17, precision milling the front end face and the rear end face of the long shaft blank, processing the second threaded hole, the through hole and the blind hole on the front end face and the rear end face of the long shaft blank, coaxially expanding the front ends of the two first process holes, and eccentrically expanding the front end of the second process hole with the drill sleeve to obtain a finished shaft rod for drilling equipment.

2. The processing technology of the shaft rod for drilling equipment made of high temperature alloy material as claimed in claim 1, characterized in that: Step S5 In the process, a press is used to correct the runout of the bent and deformed long-axis blank to within 0.5 mm.

3. The processing technology of the shaft rod for drilling equipment made of high temperature alloy material as claimed in claim 1, characterized in that: In steps S8, S10, S12, S14 and S16, a press is used to calibrate the runout of the bent and deformed long-axis blank to within 0.12 mm.

4. The processing technology of the shaft rod for drilling equipment made of high temperature alloy material as claimed in claim 1, characterized in that: In step S15, the outer shape structure includes a countersunk hole, a U-shaped groove and a second key groove.

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