An automatic clamping method for producing a journal type blade

Abstract

The application provides an automatic clamping method for producing a journal type blade, comprising the following steps: automatic clamping preparation, blade and clamp, loading and unloading station preparation, torque wrench parameter setting; presetting the torque and rotating circle number (8-10 circles) of the force limiting wrench in the system; setting the tail seat position of the loading and unloading station and setting the jacking force; part grabbing and positioning; the manipulator grabs the big end journal of the blade, approaches the middle position of the two clamping jaws of the self-centering clamp on the loading and unloading station, axially approaches the axial positioning block, and laterally approaches the lateral positioning point; the tail seat of the loading and unloading station jacks up the blade, that is, the tail seat of the loading and unloading station is in contact with the fillet of the journal of the blade; the force limiting wrench is locked; the position of the blade is accurately positioned; the tail seat of the loading and unloading station retreats, and the clamping of the blade is completed. The application has the following advantages: the clamping efficiency and quality of single process machining of the journal type blade are significantly improved, the single piece clamping time is greatly shortened, the efficiency is greatly improved, and the single process automatic clamping with high precision and low cost is realized.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing automation technology, specifically to an automated clamping method for single-process machining of journal-type blades, particularly addressing the high-precision and high-efficiency clamping requirements of precision journal-type parts such as engine blades and gas turbine blades in a single machining process. Through the coordinated control of a robotic arm, tailstock, and specialized fixture, the entire process of blade machining, from blank positioning to fixture fixation, is achieved without human intervention. Background Technology

[0002] In the single-process machining of journal-type blades, traditional clamping methods mainly rely on manual operation or semi-automatic equipment. Manual clamping requires repeated adjustments to the mating position of the blade journal and the fixture, which is time-consuming, usually exceeding ten minutes, and prone to positioning deviations exceeding 0.1 mm due to operational errors. While existing semi-automatic clamping equipment can partially replace manual operation, its tailstock and fixture coordination precision is insufficient, and the clamping force control is coarse, making it difficult to meet the deformation prevention requirements of thin-walled blade structures. In addition, traditional fixtures lack a real-time feedback mechanism, and clamping loosening can easily occur during machining due to vibration or cutting force fluctuations, directly affecting the surface quality of the machined surface. Currently, there is an urgent need for an automated clamping method that integrates high-precision positioning and adaptive clamping force control to meet the high-precision and high-reliability single-process machining requirements of journal-type blades. Summary of the Invention

[0003] The purpose of this invention is to provide an automated clamping method for the production of journal-type blades. By utilizing the coordinated operation of a robotic arm, tailstock, and specialized fixtures, this method overcomes the technical bottlenecks of traditional clamping techniques, such as low efficiency, poor precision, and easy damage to the blades. It can improve the processing quality and clamping efficiency of these blades, while reducing blade deformation rate and production costs.

[0004] The automated clamping method for producing journal-type blades according to the present invention includes the following steps:

[0005] Step 1: Automated Clamping Preparation

[0006] Step 1.1 Preparation of blades, clamps, and loading / unloading station

[0007] like Figure 1 , 2 3. Prepare blades and clamps, and loading / unloading station.

[0008] Step 1.2 Torque Wrench Parameter Settings

[0009] The system presets the torque of the torque-limiting wrench to 300–400 Nm and the number of rotations to 8–10.

[0010] Step 1.3 Setting the position of the tailstock at the loading / unloading station and setting the clamping force.

[0011] Set the tailstock position of the loading / unloading station to L1=0, and set the clamping force to 100~150Nm.

[0012] Step 2: Part Picking and Positioning

[0013] The robotic arm grips the large end journal of the blade, close to the middle position of the two jaws of the self-centering fixture on the loading and unloading station, axially close to the axial positioning block, and laterally close to the lateral positioning point.

[0014] Step 3: Tighten the tailstock of the loading / unloading station to the blade, that is, make contact between the tailstock of the loading / unloading station and the fillet of the blade journal.

[0015] The loading / unloading station is instructed to rapidly approach the journal fillet. When the distance L1 = 3-5mm, the rapid speed is reduced to a slow speed S = 3-5m / min, until the journal fillet contacts the tailstock chamfer. The contact force and distance of the loading / unloading station tailstock are set. The robotic gripper is then opened to release the blade.

[0016] Step 4: Tighten with the torque limiter wrench;

[0017] Tighten the dovetail blade according to the set number of turns and torque using the torque-limiting wrench, based on the process standard.

[0018] Step 5: Accurately locate the blade position;

[0019] Step 5.1 The tailstock of the loading / unloading station moves backward, L1 = 0.3~0.5mm;

[0020] Step 5.2 Loosen the torque limiter;

[0021] Step 5.3 The tailstock of the loading / unloading station advances, L1 = 0mm;

[0022] Step 5.3 Tighten the torque limiter wrench again;

[0023] Tighten the dovetail blade according to the set number of turns and torque using the torque-limiting wrench, based on the process standard.

[0024] Step 6: The tailstock of the loading and unloading station moves back, L1 = 30-50mm, to complete the blade clamping.

[0025] Advantages of this invention:

[0026] The automated clamping method for journal-type blade production described in this invention significantly improves the clamping efficiency and quality of single-process machining of journal-type blades through the coordinated control of a robotic arm, tailstock, and specialized fixtures. By combining the synchronized action of the hydraulically driven tailstock and the pneumatic locking fixture, the clamping time for a single piece is greatly shortened, resulting in a significant increase in efficiency. Simultaneously, by adjusting the clamping force through parameters such as torque and position, deformation of thin-walled blades due to clamping overload is effectively avoided. Furthermore, this clamping solution supports rapid replacement of fixture adapter modules, accommodating diverse blade machining needs with various journal diameters. This reduces labor costs and lowers the scrap rate due to clamping errors, achieving high-precision, low-cost automated clamping for single processes.

[0027] Instruction manual illustrations

[0028] Figure 1 This is a schematic diagram of the blade structure;

[0029] Figure 2 This is a schematic diagram of a self-centering fixture;

[0030] Figure 3 This is a schematic diagram of the loading and unloading station structure;

[0031] Figure 4 This is a schematic diagram showing the location of the tail section of the loading and unloading station. Detailed Implementation

[0032] The present invention will be further explained below with reference to specific implementation schemes, but it is not limited to the present invention. The structures, proportions, sizes, etc. shown in the accompanying drawings are only used to complement the content disclosed in the specification, so as to enable those skilled in the art to understand and read, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0033] This embodiment provides an automated clamping method for the production of journal-type blades, including the following steps:

[0034] Step 1: Automated clamping preparation;

[0035] Step 1.1 Preparation of blades, clamps, and loading / unloading station;

[0036] Prepare blades and clamps, and loading / unloading station;

[0037] Step 1.2 Torque wrench parameter settings;

[0038] The system presets the torque of the force-limiting wrench to 300 Nm and the number of rotations to 8.

[0039] Step 1.3 Setting the position of the tailstock at the loading / unloading station and setting the clamping force;

[0040] Set the tailstock position of the loading / unloading station to L1=0, and set the clamping force to 100Nm;

[0041] Step 2: Part gripping and positioning;

[0042] The robotic arm grips the large end journal of the blade, close to the middle position of the two jaws of the self-centering fixture on the loading and unloading station, axially close to the axial positioning block, and laterally close to the lateral positioning point.

[0043] Step 3: The tailstock of the loading / unloading station is tightened against the blade, that is, the tailstock of the loading / unloading station makes contact with the fillet of the blade journal.

[0044] The loading / unloading station is instructed to rapidly approach the journal fillet. When the distance L1 = 3mm, the rapid speed is reduced to a slow speed S = 3m / min, until the journal fillet contacts the tailstock chamfer. The contact force and distance of the loading / unloading station's tailstock are set. The robotic gripper is then opened to release the blade.

[0045] Step 4: Tighten with the torque limiter wrench;

[0046] Tighten the dovetail blade according to the set number of turns and torque using the torque-limiting wrench, based on the process standard.

[0047] Step 5: Accurately locate the blade position;

[0048] Step 5.1 The tailstock of the loading / unloading station moves backward, L1 = 0.5mm;

[0049] Step 5.2 Loosen the torque limiter;

[0050] Step 5.3 The tailstock of the loading / unloading station advances, L1 = 0mm;

[0051] Step 5.3 Tighten the torque limiter wrench again;

[0052] Tighten the dovetail blade according to the set number of turns and torque using the torque-limiting wrench, based on the process standard.

[0053] Step 6: The tailstock of the loading and unloading station moves back, L1 = 50mm, and the blade clamping is completed.

[0054] Matters not covered in this invention are common knowledge.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated clamping method for the production of a journal type blade, characterized by: The automatic clamping method for the production of the shaft journal type blade comprises the following steps: Step 1: automatic clamping preparation; Step 1.1: blade and clamp, loading and unloading station preparation; Step 1.2: torque wrench parameter setting; The torque of the torque wrench in the system is set to 300-400 Nm, and the rotation number is set to 8-10 turns; Step 1.3: loading and unloading station tail seat position setting and clamping force setting; The tail seat position L1 of the loading and unloading station is set to 0, and the clamping force is set to 100-150 Nm; Step 2: part grabbing and positioning; The robot hand grabs the blade big end shaft journal, approaches the middle position of the two clamping jaws of the self-centering clamp on the loading and unloading station, axially approaches the axial positioning block, and laterally approaches the lateral positioning point; Step 3: the loading and unloading station tail seat clamps the blade, that is, the tail seat of the loading and unloading station contacts the fillet of the blade shaft journal; The loading and unloading station is given an instruction to make the tail seat of the loading and unloading station quickly approach the shaft journal fillet, when the distance L1 is 3-5 mm, the speed is quickly changed to slow, the speed S is 3-5 m / min, until the shaft journal fillet contacts the tail seat chamfer, the contact force and distance of the tail seat of the loading and unloading station are set; open the first robot hand clamping jaw and release the blade; Step 4: torque wrench locking; Lock the blade dovetail process reference according to the set number of turns and torque of the torque wrench; Step 5: accurate positioning of the blade position; Step 6: the tail seat of the loading and unloading station retreats, L1=30-50 mm, and the blade clamping is completed.

2. The automated clamping method for production of a journal type vane as claimed in claim 1, wherein: The step 5 comprises: Step 5.1: the tail seat of the loading and unloading station retreats, L1=0.3-0.5 mm; Step 5.2: loosen the torque wrench; Step 5.3: the tail seat of the loading and unloading station advances, L1=0 mm; Step 5.3: lock the torque wrench again; Lock the blade dovetail process reference according to the set number of turns and torque of the torque wrench.

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