CN204248227U - A kind of hold-down mechanism for gearbox gear laser weld - Google Patents

Abstract

The utility model relates to a kind of hold-down mechanism for gearbox gear laser weld, by Work-sheet pressing in laser beam welding, reduce workpiece end face deflection, it is characterized in that: 1) hold-down mechanism is primarily of bearing ring, loading plate, rotating shaft, lifting device composition, bearing ring up, between loading plate is placed in the middle, lifting device, rotating shaft are in below; 2) lifting device adopts driven by servomotor, position and torque control mode, the setting of precompression parameters numberization and adjustment; 3) rotating shaft adopts air spider to complete clamping and location, and duplex dish gear is by endoporus clamping and location, and duplex shaft gear is by cylindrical clamping and location; 4) bearing ring workpiece pressing upper surface, adopts 4 angular contact bearings, with workpiece synchronous rotary; 5) loading plate adopts four station rotary dishes, and configuration care feed tray, adopts the accurate calibration of precision cam dispenser, intermittent movement.

Description

A kind of hold-down mechanism for gearbox gear laser weld

Technical field

The utility model relates to gearbox gear fully-automatic laser welding equipment, belongs to field of laser processing.Be applied to the gearbox gear welding of automobile manufacture industry, promote gear manufacture quality.The utility model provides a kind of hold-down mechanism for gearbox gear laser weld, carries out laser weld after being compressed by the duplicate gear end face of matched together by bearing ring, loading plate, rotating shaft, lifting device etc.

Background technology

Auto industry occupies critical role in Chinese national economy, particularly automobile industry fast development in recent years, and automobile progressively enters common people family, and self-driving becomes first-selected trip mode.Automobile is divided into manual gear and automatic catch two class, and the effect of manual-gear vehicle gearbox is that automobile adapts to running resistance change, changes drive wheel torque and rotating speed.Gearbox is primarily of compositions such as gear train, axle system and casings, and manually change gear is to the speed ratio changing gear-box, obtains required drive wheel torque and rotating speed.

China's gearbox gear through the nearly more than ten years research, the particularly introduction of American-European advanced technology, have employed volume little, lightweight duplex dish gear and duplex shaft gear in a large number, reduce installing space and the gearbox volume of parts, improve the integrated level of gearbox.The manufacture craft of duplicate gear is: the processing of dish gear mechanism, shaft gear processing, ring gear are processed, clean, press-fit, welded.Early stage duplicate gear welding method is generally electric resistance welding, electron beam welding, induction welding, requires to weld under vacuum conditions, complex technical process, workpiece deformation amount at about 0.15mm, single-piece production beat one minute, inefficiency, product quality is not high, but equipment investment fund is less.Along with the continuous progress of technology and the lifting of business economic strength, what the product of domestic and international 70% adopted at present is laser welding process, have that weldering is dark stable, production capacity is high, be out of shape the advantages such as little, as the manual gear bonding machine that my company produces, workpiece deformation amount is at about 0.07mm, single-piece production beat reaches 8 seconds, weldering is stabilized within the scope of 0.5mm tolerance range deeply, weld width is at more than 1.2mm, weld strength is high, weld seam is attractive in appearance, significantly improves the welding procedure level of duplicate gear, obtains the extensive accreditation in market.

What require along with product quality improves constantly, and the continuous replenishment of process equipment of domestic enterprise, particularly requires to improve further to duplicate gear deflection, promote gearbox quality.According to the design feature of duplicate gear, dish gear or shaft gear thicker, the face deformation that machining produces almost is ignored, and ring gear is thinner, and thickness is generally at 3-6mm, and laser engine processing face deformation amount is at about 0.07mm.In the welding methods such as traditional electron beam welding, the deflection of workpiece is machining deflection and welding deformation amount sum; Do not using in the laser welding process of hold down gag, laser weld distortion is very little, and the deflection of workpiece is mainly machining deflection; In order to by workpiece end face deformation amount controlling within 0.03mm, must adopt and compress laser welding process, by effective clamping method, make workpiece in welding process, not only to control laser weld deflection, and the deflection that workpiece mechanical processing process produces is repaired in welding process.

In order to study the process reducing workpiece deformation amount, our company has carried out deep practice from the heat preservation method after the pre-heating technique before laser weld, the pressing process welding process, welding procedure, welding.The aspects such as the hold-down mechanism particularly in welding process, the setting of precompression and adjustment, through three improvement and perfections, meet the quality requirement of automobile gearbox gear.Gearbox gear hold-down mechanism has following features: 1) hold-down mechanism is primarily of compositions such as bearing ring, loading plate, rotating shaft, lifting devices, complete the logical action such as lifting, feeding, location clamping, precompressed puts in place, workpiece rotation, meet Automated condtrol requirement; 2) according to product feature, precompression setting range 500-3000kg, precompression parameter can set and regulate on operation interface, meets product specification and converts frequent requirement; 3) current domestic Gear by Laser welding equipment adopts mandrel location, does not have clamping force to part; In this hold-down mechanism, rotating shaft adopts pneumatic scroll chuck to clamp and location, and duplex dish gear is by endoporus clamping and location, and duplex shaft gear adopts cylindrical clamping and location; 4) lifting device of import Gear by Laser welding equipment adopts air cylinder driven, and passing ratio valve controls its motion, and thrust is less, and the impact of cylinder can produce noise; This hold-down mechanism is by driven by servomotor, position+torque control mode, time up, lifting device moves to loading plate feeding position and adopts bit value set mode from home position, torque setting mode is adopted from feeding position to compacted position, moment of torsion arrives setup parameter servomotor to be stopped, time descending, lifting device adopts the former road of position control mode to return, good operation stability; 5) the Gear by Laser welding equipment single-piece production beat about 13 seconds of hold-down mechanism is adopted, both can meet duplex dish gear and compress welding, can meet again duplex shaft gear and compress welding, class's output reaches more than 2000, production efficiency is higher, meets needs that are in enormous quantities, multi-item production completely.

Utility model content

The purpose of this utility model is to provide a kind of hold-down mechanism for gearbox gear laser weld, be applied to gearbox gear fully-automatic laser welding equipment, complete the logical action such as lifting, feeding, location clamping, precompressed puts in place, workpiece rotation, by Work-sheet pressing in laser beam welding, reduce workpiece end face deflection, realize precompression digitlization setting, raised position setting, etc. function, by workpiece end face deformation amount controlling within 0.03mm, meet the requirement of high-quality duplicate gear laser welding process.The utility model discloses a kind of hold-down mechanism for gearbox gear laser weld, it is characterized in that: 1) hold-down mechanism is primarily of bearing ring, loading plate, rotating shaft, lifting device composition, up, between loading plate is placed in the middle, lifting device, rotating shaft are in below for bearing ring; 2) rotating shaft vertically moves by lifting device, ball screw, line slideway auxiliary driving, adopt driven by servomotor, position and torque control mode, time up, lifting device moves to loading plate feeding position and adopts bit value set mode from home position, torque setting mode is adopted from loading plate feeding position to bearing ring compacted position, moment of torsion arrives setup parameter servomotor to be stopped, time descending, lifting device adopts the former road of position control mode to return, the setting of precompression parameters numberization and adjustment; 3) rotating shaft adopts air spider to complete clamping and location, and duplex dish gear is by endoporus clamping and location, and duplex shaft gear is by cylindrical clamping and location, and air spider rotates by driven by servomotor, toothed belt transmission; 4) bearing ring workpiece pressing upper surface, for carrying axial compressive force, adopts 4 angular contact bearings, with workpiece synchronous rotary, avoids abrading surface of the work; 5) loading plate adopts four station rotary dishes, and configuration care feed tray, adopts the accurate calibration of precision cam dispenser, intermittent movement.Hold-down mechanism is primarily of compositions such as bearing ring, loading plate, rotating shaft, lifting devices, bearing ring operation principle is: binder dish 6 and workpiece 5 upper surface compress fits, pressure passes to adpting flange 8 by 4 angular contact bearings 7, adpting flange 8 is connected by screw fastening with loading plate 2 support, workpiece 5 and binder dish 6 synchronous rotary.Loading plate operation principle is: loading plate 2 has four care feed tray 4 installing holes, gap fiting mode, workpiece 5 is placed in locating hole on care feed tray 4, loading plate 2 drives backspin to go to air spider 9 feeding position at Cam splitter 3 motor, after laser weld completes, workpiece 5 gets back to loading plate 2 together with care feed tray 4, and drives backspin to go to blanking position at Cam splitter 3 motor.Rotating shaft operation principle is: claw 10 holding workpiece 5 on air spider 9 is also located, and rotating shaft servomotor 13 drives chuck main shaft 11 to rotate by Timing Belt 12, rotates stopping after completing welding.Lifting device operation principle is: lift shaft servomotor 16 opsition dependent set model drives lift shaft ball wire bar pair 18 through right angle reductor 17, rotating shaft is promoted to below loading plate 2 by lift shaft line slideway auxiliary 19 guide-localization, claw 10 to workpiece 5 retaining part also steps up, lifting device continues up, workpiece 5 to be compacted to the binder dish 6 on bearing ring by lift shaft servomotor 16 by moment of torsion set model, lift shaft servomotor 16 moment of torsion stops after arriving setup parameter, and laser weld completes Hou Anyuan road and returns.Use through user's actual production, this hold-down mechanism is reliable, meets high-end automatic Gear laser welding apparatus performance requirement.Below in conjunction with the application of this mechanism on " automatic Gear laser welding apparatus ", the utility model is described in further detail.

Accompanying drawing explanation

Fig. 1 is the hold-down mechanism assembling schematic diagram of the utility model gearbox gear laser weld, and it mainly forms: loading plate support 1, loading plate 2, Cam splitter 3, care feed tray 4, workpiece 5, binder dish 6,4 angular contact bearings 7, adpting flange 8, air spider 9, claw 10, chuck main shaft 11, Timing Belt 12, rotating shaft servomotor 13, main engine bed 14, trunnion axis driving mechanism 15, lift shaft servomotor 16, right angle reductor 17, lift shaft ball wire bar pair 18, lift shaft line slideway auxiliary 19, lift shaft support 20, trunnion axis line slideway auxiliaries 21.

Detailed description of the invention

The hold-down mechanism compact conformation of gearbox gear laser weld, rationally distributed, compress object and be divided into duplex dish gear and duplex shaft gear two class, detailed description of the invention is as follows:

The compression of duplex dish gear: as shown in Figure 1, trunnion axis driving mechanism 15 drives immediately below lift shaft support 20 to loading plate 2 feeding place by screw mandrel, workpiece 5 material loading is in loading plate 2, Cam splitter 3 motor drives loading plate 2, workpiece 5 to be welded is rotated to loading plate feeding place, lift shaft servomotor 16 opsition dependent set model drives rotating shaft to be promoted to below loading plate 2, claw 10 to workpiece 5 retaining part also steps up, lifting device continues up, workpiece 5 to be compacted to the binder dish 6 on bearing ring by lift shaft servomotor 16 by moment of torsion set model, lift shaft servomotor 16 moment of torsion stops after arriving setup parameter, rotating shaft servomotor 13 drives chuck main shaft 11 to rotate by Timing Belt 12, stopping is rotated after completing welding, claw 10 on air spider 9 unclamps, lift shaft servomotor 16 opsition dependent set model drives rotating shaft to come downwards to loading plate 2 position simultaneously, workpiece 5 gets back to loading plate 2 together with care feed tray 4, lift shaft servomotor 16 opsition dependent set model drives rotating shaft to continue immediately below descending loading plate 2 feeding place, repeat actuation cycle next time.

The compression of duplex shaft gear: as shown in Figure 1, lifting device is positioned on the right side of main engine bed 14, claw 10 on air spider 9 unclamps, rear clamping put into by workpiece 5, trunnion axis driving mechanism 15 drives immediately below lift shaft support 20 to binder dish 6 by screw mandrel, lift shaft servomotor 16 opsition dependent set model drives rotating shaft to be promoted to binder dish 6 apart from 3mm place, workpiece 5 to be compacted to the binder dish 6 on bearing ring by lift shaft servomotor 16 by moment of torsion mode activated rotating shaft, lift shaft servomotor 16 moment of torsion stops after arriving setup parameter, rotating shaft servomotor 13 drives chuck main shaft 11 to rotate by Timing Belt 12, stopping is rotated after completing welding, lift shaft and move horizontally Zhou Yuan road and return, claw 10 unclamps, actuation cycle is next time repeated after taking off workpiece 5.

The hold-down mechanism of gearbox gear laser weld and laser beam welding are by preset program action, and adopt CNC System from Siemens, automaticity is high, stable and reliable operation.

Claims (3)

1. the hold-down mechanism for gearbox gear laser weld, it is characterized in that: hold-down mechanism is primarily of bearing ring, loading plate, rotating shaft, lifting device composition, bearing ring up, between loading plate is placed in the middle, lifting device, rotating shaft are in below, lifting device adopts driven by servomotor, position and torque control mode, the setting of precompression parameters numberization and adjustment, rotating shaft adopts air spider to complete clamping and location, duplex dish gear is by endoporus clamping and location, and duplex shaft gear is by cylindrical clamping and location.

2. hold-down mechanism according to claim 1, is characterized in that: bearing ring adopts 4 angular contact bearings, with workpiece synchronous rotary.

3. hold-down mechanism according to claim 1, is characterized in that: loading plate adopts four station rotary dishes, and configuration care feed tray, adopts the accurate calibration of precision cam dispenser, intermittent movement.