Automatic clamping method for journal blade production

Abstract

The invention provides an automatic clamping method for shaft neck type blade production. The automatic clamping method comprises the following steps of automatic clamping preparation, blade, clamp and loading and unloading station preparation and torque wrench parameter setting. The torque of the force limiting wrench is preset in the system, and the number of rotation turns is 8-10; setting the position of a loading and unloading station tailstock, and setting jacking force; parts are grabbed and positioned; the mechanical arm grabs the large-end shaft neck of the blade, is close to the middle position of two clamping jaws of the self-centering clamp on the loading and unloading station, is axially close to the axial positioning block and is laterally close to the lateral positioning point; the loading and unloading station tailstock abuts against the blade, that is, the loading and unloading station tailstock makes contact with the blade journal fillet; the force limiting wrench is locked; the blade position is accurately positioned; and the tailstock of the loading and unloading station retreats, and blade clamping is completed. The automatic clamping device has the advantages that the clamping efficiency and quality of shaft neck type blade single-process machining are remarkably improved, the single-piece clamping time is greatly shortened, the efficiency is greatly improved, and high-precision and low-cost single-process automatic clamping is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical manufacturing automation technology, and specifically to an automated clamping method for single-process processing of journal blades, especially for high-precision and high-efficiency clamping requirements of precision journal parts such as engine blades and gas turbine blades in a single processing process. Through the coordinated control of the manipulator, tailstock and special fixture, the unmanned operation of the blade from blank positioning to fixture fixing is realized. Background Art

[0002] In the single-process processing of journal-type blades, the traditional clamping method mainly relies on manual operation or semi-automatic equipment. Manual clamping requires repeated adjustment of the matching position of the blade journal and the fixture, which is time-consuming, usually more than ten minutes, and is prone to positioning deviations due to operational errors, with errors exceeding 0.1mm. Although the existing semi-automatic clamping equipment can partially replace manual labor, the coordination accuracy between the tailstock and the fixture is insufficient, and the clamping force control is rough, which is difficult to adapt to the anti-deformation requirements of the thin-walled structure of the blade. In addition, the traditional fixture lacks a real-time feedback mechanism, and it is easy to cause the clamping to loosen due to vibration or cutting force fluctuations during the processing process, which directly affects the quality of the processed surface. At present, there is an urgent need for an automated clamping method that integrates high-precision positioning and adaptive clamping force control to meet the single-process processing requirements of high-precision and high-reliability journal-type blades. Summary of the invention

[0003] The purpose of the present invention is to provide an automated clamping method for the production of journal blades, which solves the technical bottlenecks of low efficiency, poor precision and easy damage to blades in traditional clamping technology through the coordinated cooperation of a manipulator, a tailstock and a special clamp. It can improve the processing quality and clamping efficiency of such blades, and reduce the deformation rate and production cost of the blades.

[0004] The automated clamping method for producing journal blades of the present invention comprises the following steps:

[0005] Step 1: Automated clamping preparation

[0006] Step 1.1 Preparation of blades, fixtures and loading and unloading stations

[0007] like Figure 1 , 2 3. Prepare blades, fixtures, and loading and unloading stations.

[0008] Step 1.2 Torque wrench parameter setting

[0009] The torque of the force-limiting wrench is preset in the system to be 300-400 Nm and the number of rotations is 8-10 circles.

[0010] Step 1.3 Setting the tailstock position and tightening force of the loading and unloading station

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

[0012] Step 2 Part grasping and positioning

[0013] The manipulator grasps the large-end journal of the blade, approaches the middle position between the two jaws of the self-centering fixture on the loading and unloading station, axially approaches the axial positioning block, and laterally approaches the lateral positioning point.

[0014] Step 3 The tailstock of the loading and unloading station tightens the blade, that is, the tailstock of the loading and unloading station contacts the fillet of the blade journal

[0015] Give an instruction to the loading and unloading station to make the tailstock of the loading and unloading station quickly approach the fillet of the journal. When the distance L1 = 3 - 5 mm, quickly change to slow speed, and the speed S = 3 - 5 m / min until the fillet of the journal contacts the chamfer of the tailstock. The contact force and distance of the tailstock of the loading and unloading station are set as required. First, open the jaws of the manipulator and release the blade.

[0016] Step 4 Lock with a torque-limiting wrench;

[0017] Lock the dovetail process datum of the blade with the torque-limiting wrench according to the set number of turns and torque;

[0018] Step 5 Accurately position the blade;

[0019] Step 5.1 The tailstock of the loading and unloading station retracts, L1 = 0.3 - 0.5 mm;

[0020] Step 5.2 Loosen the torque-limiting wrench;

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

[0022] Step 5.3 Lock the torque-limiting wrench again;

[0023] Lock the dovetail process datum of the blade with the torque-limiting wrench according to the set number of turns and torque;

[0024] Step 6 The tailstock of the loading and unloading station retracts, L1 = 30 - 50 mm, and the blade clamping is completed.

[0025] Advantages of the present invention:

[0026] The automatic clamping method for the production of journal-type blades according to the present invention significantly improves the clamping efficiency and quality of single-process machining of journal-type blades through the coordinated control of a manipulator, a tailstock, and a special fixture. Combining the synchronous actions of a hydraulically driven tailstock and a pneumatically locked fixture, the single-piece clamping time is greatly shortened, and the efficiency is significantly improved. At the same time, the clamping force is adjusted through parameters such as torque and position, effectively avoiding the deformation problem of thin-walled blades caused by excessive clamping force. In addition, this clamping scheme supports the rapid replacement of the fixture adaptation module, can be compatible with the diverse machining requirements of various journal diameters, reduces labor costs while decreasing the scrap rate caused by clamping errors, and realizes high-precision and low-cost single-process automatic clamping.

[0027] Explanatory drawings of the specification

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

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

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

[0031] Figure 4 It is a schematic diagram of the position of the tailstock of the loading and unloading station. Specific implementation manners

[0032] The present invention will be further explained below in conjunction with specific implementation manners, but the present invention is not limited thereto. The structures, ratios, sizes, etc. shown in the explanatory drawings of the specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the implementable conditions of the present invention. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

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

[0034] Step 1 Automatic clamping preparation;

[0035] Step 1.1 Preparation of the blade, fixture, and loading and unloading station;

[0036] Prepare the blade, fixture, and loading and unloading station;

[0037] Step 1.2 Setting of the parameters of the torque wrench;

[0038] Preset the torque of the torque-limiting wrench in the system to 300 Nm and the number of rotation turns to 8 turns;

[0039] Step 1.3 Set the position of the tailstock of the loading and unloading station and set the clamping force;

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

[0041] Step 2 Part grasping and positioning;

[0042] The manipulator grasps the large end journal of the blade, approaches the middle position between the two jaws of the self-centering fixture on the loading and unloading station, axially approaches the axial positioning block, and laterally approaches the lateral positioning point;

[0043] Step 3 The tailstock of the loading and unloading station presses against the blade, that is, the tailstock of the loading and unloading station contacts the fillet of the blade journal;

[0044] Give an instruction to the loading and unloading station to make the tailstock of the loading and unloading station quickly approach the fillet of the journal. When the distance L1 = 3 mm, quickly change to slow speed, and the speed S = 3 m / min until the fillet of the journal contacts the chamfer of the tailstock. The contact force and distance of the tailstock of the loading and unloading station are set as required. First, open the jaws of the manipulator and release the blade;

[0045] Step 4 Lock with a torque-limiting wrench;

[0046] Lock the dovetail process reference of the blade with the torque-limiting wrench according to the set number of turns and torque;

[0047] Step 5 Accurately position the blade;

[0048] Step 5.1 The tailstock of the loading and unloading station retracts, L1 = 0.5 mm;

[0049] Step 5.2 Loosen the torque-limiting wrench;

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

[0051] Step 5.3 Lock the torque-limiting wrench again;

[0052] Lock the dovetail process reference of the blade with the torque-limiting wrench according to the set number of turns and torque;

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

[0054] Matters not covered by this invention are well-known technologies.

[0055] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated clamping method for the production of journal-type blades, characterized in that: The automatic clamping method for the production of journal-type blades includes the following steps: Step 1: Automatic clamping preparation; Step 1.1: Preparation of blades, fixtures, and loading / unloading stations; Step 1.2: Parameter setting of the torque wrench; The torque of the limited force wrench is preset in the system to be 300 - 400 Nm, and the number of rotation turns is 8 - 10 turns; Step 1.3: Setting the position of the tailstock of the loading / unloading station and setting the tightening force; Set the position of the tailstock of the loading / unloading station L1 = 0, and set the tightening force to 100 - 150 Nm; Step 2: Part grasping and positioning; The manipulator grasps the large end journal of the blade, approaches the middle position between the two jaws of the self-centering fixture on the loading / unloading station, axially approaches the axial positioning block, and laterally approaches the lateral positioning point; Step 3: The tailstock of the loading / unloading station tightens the blade, that is, the tailstock of the loading / unloading station contacts the fillet of the blade journal; Give an instruction to the loading / unloading station to make the tailstock of the loading / unloading station quickly approach the fillet of the journal. When the distance L1 = 3 - 5 mm, quickly change to slow speed, with the speed S = 3 - 5 m / min, until the fillet of the journal contacts the chamfer of the tailstock. The contact force and distance of the tailstock of the loading / unloading station are set as required; First, open the jaws of the manipulator and release the blade; Step 4: Locking with the limited force wrench; Lock the dovetail process datum of the blade with the limited force wrench according to the set number of turns and torque; Step 5: Accurately position the blade; Step 6: The tailstock of the loading / unloading station retracts, L1 = 30 - 50 mm, and the blade clamping is completed.

2. The automatic clamping method for the production of journal-type blades according to claim 1, characterized in that: The said Step 5 includes: Step 5.1: The tailstock of the loading / unloading station retracts, L1 = 0.3 - 0.5 mm; Step 5.2: Loosen the limited force wrench; Step 5.3: The tailstock of the loading / unloading station advances, L1 = 0 mm; Step 5.3: Lock the limited force wrench again; Lock the dovetail process datum of the blade with the limited force wrench according to the set number of turns and torque.

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