CN2780400Y

CN2780400Y - Full electric friction welding machine

Info

Publication number: CN2780400Y
Application number: CN 200520028439
Authority: CN
Inventors: 姜洪权; 张向红; 张野; 赵艳会; 于滨; 陈秀香; 李大军
Original assignee: CHANGCHUN CNC MACHINE TOOL Co Ltd
Current assignee: CHANGCHUN CNC MACHINE TOOL Co Ltd
Priority date: 2005-03-30
Filing date: 2005-03-30
Publication date: 2006-05-17
Anticipated expiration: 2015-03-30

Abstract

The utility model relates to a full electric friction welding machine structure, which belongs to the class of electromechanization. The utility model is composed of a lathe bed, a main shaft drive system and a friction drive system, wherein the main shaft drive system uses a frequency change motor which is controlled by a full servo frequency changer; a brake cylinder and a rotary oil cylinder are canceled, so the structure of the main shaft drive system is simplified; the friction drive system uses a structure that a ballscrew pair is driven by the frequency change motor, the rotation motion of the motor is changed into the rectilinear motion of a nut of the ballscrew pair, and a main oil cylinder is canceled; a rotary clamp uses a disk spring clamping structure or a self-clamping structure, a mobile clamp uses an electrical drive clamping structure, so the utility model has the advantages that a hydraulic system is canceled, full electric control is realized, welding parameter is accurately controlled, welding quality and welding efficiency are increased, environment pollution is reduced and green manufacture is realized.

Description

All electric friction-welding machine structure

Technical field

The utility model relates to electrical category, particularly a kind of all electric friction-welding machine structure.

Background technology

As everyone knows, friction-welding machine is an equipment of realizing friction welding, the structure of present common friction-welding machine both at home and abroad as shown in Figure 1, be made of parts such as lathe bed 1 ', main axis transmission system 2 ', friction drive system 3 ', hydraulic system, electric-control systems, lathe bed 1 ' is supporting main axis transmission system 2 ' and friction drive system 3 '; Main axis transmission system 2 ' mainly rotatablely moves workpiece A clamping on rolling clamp 24 ', it mainly is to be made of parts such as main motor 21 ', belt drive unit 22 ', main spindle box 23 ', main shaft, clutch and brake apparatus, rolling clamps 24 '; Main motor 21 ' is by the belt transmission drive shaft, front-end of spindle is installed rolling clamp 24 ', rolling clamp 24 ' holding workpiece A is rotated, main motor and main shaft from close and the fast braking of main shaft is realized by clutch and brake apparatus, clutch and brake apparatus drive by killing the car cylinder, rolling clamp adopts collet or fixture block, clamps with rotary oil cylinder, and rotary oil cylinder is by the separator fuel feeding that is enclosed within on the main shaft; Friction drive system 3 ' mainly is that workpiece B clamping is moved axially on mobile anchor clamps 31 ', applies axial force and makes that workpiece A and workpiece B rub, upset; It mainly is to be made of parts such as mobile anchor clamps 31 ', Mobile Slide 32 ', master cylinders 33 ', mobile anchor clamps 31 ' are driven by hydraulic jack, holding workpiece B also is installed on the Mobile Slide 32 ', Mobile Slide moves axially under the promotion of master cylinder 33 ', realize friction-driven, the axial force of friction process is from the promotion of master cylinder; Hydraulic system mainly is that control drives brake oil cylinder, rolling clamp oil cylinder, mobile anchor clamps oil cylinder and master cylinder, and it mainly is made up of parts such as hydraulic oil container, motor, hydraulic pump, hydraulic control valve, fluid pressure line, oily temperature controllers; Electric-control system mainly is to realize the motion of each system in the welding process by controlling main motor, hydraulic electric motor and hydraulic control valve, mainly is the automatic control by range controller partially carries out that clamp, main axis rotation, slide unit feeding, friction beginning, main shaft stop, upset, pressurize, anchor clamps unclamp, slide unit rewind down etc. moves; The characteristics of above-mentioned common friction-welding machine structure are outside the rotation of main shaft is driven by motor, the clamping of all the other rotational workpieces, the clamping of travelling workpiece, applying of axial force, the action such as stop fast of main shaft is finished by the HYDRAULIC CONTROL SYSTEM hydraulic jack, though this structure can realize the control of welding parameter, but also there are some shortcomings, the one, the stability of hydraulic system is not good, the pressure oscillation that produces owing to reasons such as the leakage of fluid pressure line and length influences welding quality, defective products such as not prison welding or weldment shortening amount be excessive appear when pressure exceeds certain limit easily, reduce the welding accepted product percentage, realize that there is limitation in high-precision welding; Hydraulic system more complicated in addition, the quantity of hydraulic control valve is many, the reliable in action of the quality of valve and these hydraulic control valves of factor affecting such as cleannes of hydraulic oil, fault rate is higher, also influences welding quality; Next is the operating pressure height of hydraulic system, and the temperature rise of hydraulic oil influences the dynamic characteristic of executive component hydraulic cylinder, reduces seal life, needs to increase oil cooling system in case of necessity; The 2nd, the main axle structure complexity of friction-welding machine, because of the rotary oil cylinder that kills car oil cylinder and rolling clamp of clutch and brake apparatus is all arranged on rotary main shaft, cause the inertia of main shaft big, complex structure, processing cost height, hydraulic system structure is huge, floor space is big, and fluid pressure line is staggered intensive, not attractive in appearance; The 3rd, environmental protection is bad, because the operating pressure height of hydraulic system, its noise is big, and the problems such as leakage of hydraulic oil in addition influence the cleaning of working environment, cause environmental pollution; In sum, there is a series of weak point in common friction-welding machine structure because of adopting hydraulic-driven, is unfavorable for accurately controlling welding parameter, need advance～go on foot improvement.

The utility model content

According to the purpose of this utility model, shortcoming at existing friction-welding machine existence, a kind of all electric friction-welding machine structure is provided, its technical scheme is the cancellation hydraulic control system, realization is controlled by electricity fully, the one, main shaft drives adopts variable-frequency motor, with complete servo Frequency Converter Control, the braking function realization that stops to utilize complete servo frequency converter fast of main shaft, cancellation clutch and brake apparatus reach and kill the car oil cylinder, thereby simplify main spindle box and main axle structure, reduce main shaft inertia, utilize the speed closed loop control and the displacement closed-loop control of complete servo frequency converter, phase accuracy in the time of more can accurately controlling the rotary speed of main shaft and parking than common friction-welding machine structure, improve welding quality, the mode from the switching controls pattern realizes Continuous Drive welding and different welding manners such as inertia production weld and phase place welding at an equipment simultaneously; The 2nd, friction-driven partly adopts variable-frequency motor to drive ball screw assembly,, and rotatablely moving of motor becomes the rectilinear motion of ball screw assembly, nut, and nut promotes Mobile Slide, makes workpiece B carry out axially-movable; Variable-frequency motor is with complete servo Frequency Converter Control, utilizes the torque closed-loop control of complete servo frequency converter to realize the output of the different axial forces of friction phase, and its precision is higher than common hydraulic-driven, and problems such as no pressure oscillation realize high-precision welding; Utilize the speed closed loop control and the displacement closed-loop control of complete servo frequency converter, more can accurately control fraction time and friction displacement than common structure; The 3rd, rolling clamp adopts high-performance dish reed to clamp, or adopts from clamping structure, the rotary oil cylinder of cancellation rolling clamp, thus main axle structure is further simplified; The 4th, mobile anchor clamps adopt electricity to drive clamping mode, cancel the clamping cylinder of mobile anchor clamps; By the improvement of above-mentioned four aspects, can accomplish to cancel hydraulic control system, realize being controlled by electricity fully;

Structure of the present utility model is to be made of lathe bed, main axis transmission system, friction drive system, mobile anchor clamps etc., wherein main axis transmission system places the lathe bed left end, it is made up of parts such as main spindle box, main shaft, hollow drive motors, rolling clamp and rotary encoders, wherein, overlap core motor on the main shaft, the drive shaft rotation, front-end of spindle is installed rolling clamp, installs on the main spindle box; Rolling clamp has adopted collet or fixture block, utilize the compression stress of dish spring that collet is axially strained, thereby clamping work pieces A, utilize the thrust of pneumohydraulic pressure-cylinder to promote collet, thereby unclamp workpiece A, the piston rod of pneumohydraulic pressure-cylinder breaks away from main shaft during main axis rotation, the main shaft tail end is installed the profile of tooth belt wheel, to rotary encoder, detect the speed of mainshaft with 1: 1 ratio transmissions, and tach signal is fed back to servo frequency converter;

The another kind of structure of main axis transmission system is that spindle drive motor passes through yielding coupling and directly is connected with the main shaft tail end, the drive shaft rotation, rotary encoder is installed in the motor shaft rear end, rolling clamp adopts from clamping mode, between collet and the clamp body is that the conical surface is connected, and its angle is the self-locking angle; After workpiece A is placed on the collet the inside, workpiece B promotes workpiece A under the thrust of friction drive system, collet is clamping work pieces A under the effect of the radial load that the conical surface produced, and after welding finished, mobile anchor clamps clamping weldment was axially pulled out, collet unclamps workpiece A automatically, no matter adopt any structure, the rotary inertia of main shaft has reduced a lot, helps main shaft and starts fast and stop under the direct driving of motor, can accomplish to cancel hydraulic control system fully, realize being controlled by electricity fully;

Friction drive system places the right-hand member of lathe bed, it is by Mobile Slide, mobile anchor clamps, thrust bearing, ball screw assembly,, motor cabinet, parts such as friction-driven motor are formed, wherein the friction-driven motor directly is connected with ball-screw by yielding coupling, the nut of ball screw assembly, is installed on the thrust bearing, and rotatablely moving of friction-driven motor becomes rectilinear motion by ball screw assembly; Thrust bearing and mobile anchor clamps are installed on the Mobile Slide, and Mobile Slide seesaws under the promotion of nut, and the axial force that the nut of ball screw assembly, produces affacts on the workpiece B by thrust bearing and distance rod, and the close workpiece A of workpiece B also rubs; Mobile anchor clamps adopt electricity to drive clamping mode, cancel the clamping cylinder of mobile anchor clamps, it is by clamp body, fixedly vee-block, mobile vee-block, lead screw pair, shaft coupling and clamping motor are formed, wherein, clamping motor drives the leading screw rotation by shaft coupling, and nut promotes mobile V-arrangement shape piece and moves also clamping work pieces B to fixing vee-block, when clamping force reaches setting, clamping motor stops and keeping the output setpoint torque, does not unclamp when guaranteeing work.

Advantage of the present utility model is: simple in structure, easy to manufacture, reduce cost, and can accomplish to cancel hydraulic control system, realize being controlled by electricity fully; Owing to adopt speed closed loop control, torque closed-loop control, the displacement closed-loop control of complete servo frequency converter, the major parameter of friction weldings such as the required axial force of the rotary speed that can more accurate control workpiece and the stop angle of workpiece, friction, fraction time, friction displacement, assurance obtains higher friction welding precision and quality, improved efficient, solve environmental pollution problems, really realized green manufacturing.

Description of drawings:

Fig. 1 is common friction-welding machine structural representation;

Fig. 2 looks cross-sectional schematic for master of the present utility model;

Fig. 3 is a schematic top plan view of the present utility model;

Fig. 4 is a main axis transmission system cross-sectional schematic of the present utility model;

Fig. 5 is an another kind of main axis transmission system cross-sectional schematic of the present utility model;

Fig. 6 is a friction drive system structure cross-sectional schematic of the present utility model;

Fig. 7 is a mobile clamp structure cross-sectional schematic of the present utility model.

The specific embodiment:

To shown in the accompanying drawing 7, the utility model mainly is that the left end at lathe bed 1 is provided with main axis transmission system 2, is provided with friction drive system 3 and mobile anchor clamps 4 at its right-hand member as accompanying drawing 2; Wherein, main axis transmission system 2 is made up of parts such as main spindle box 21, main shaft 22, core motor 24, rolling clamp 23 and rotary encoders 28, as shown in Figure 4, wherein, be with core motor 24 on the main shaft 22, the drive shaft rotation, front-end of spindle is provided with rolling clamp 23, and installs on the main spindle box 21; Rolling clamp has adopted collet or fixture block, utilize the compression stress of dish spring 25 that collet is axially strained, thereby clamping work pieces, utilize the thrust of pneumohydraulic pressure-cylinder 27 to promote collet, thereby unclamp workpiece A, the piston rod of pneumohydraulic pressure-cylinder 27 breaks away from main shaft 22 during main axis rotation, the main shaft tail end is installed profile of tooth belt wheel 26, to rotary encoder 28, detect the speed of mainshaft with 1: 1 ratio transmissions, and tach signal is fed back to servo frequency converter;

The another kind of structure of main axis transmission system is that spindle drive motor 202 is the direct connection structure with main shaft 22, as shown in Figure 5, spindle drive motor 202 directly is connected with main shaft 22 tail ends by yielding coupling 201, the drive shaft rotation, rotary encoder 28 is installed in the motor shaft rear end, rolling clamp 23 adopts from clamping mode, is that the conical surface is connected between collet and the clamp body, and its angle is the self-locking angle; After workpiece A is placed on the collet the inside, workpiece B promotes workpiece A under the thrust of friction drive system, collet is clamping work pieces A under the effect of the warp-wise power that the conical surface produced, after welding finishes, mobile anchor clamps clamping weldment is axially pulled out, and collet unclamps workpiece A automatically; No matter adopt which kind of structure, the rotary inertia of main shaft has reduced much, realizes being controlled by electricity fully;

Friction drive system 3 places the right-hand member of lathe bed 1, as shown in Figure 6, it is to be made of parts such as Mobile Slide 31, mobile anchor clamps 4, thrust bearing 33, ball screw assembly, 34, motor cabinet 35, yielding coupling 36, friction-driven motor 37, nut 38, distance rods 32, wherein friction-driven motor 37 directly is connected with ball-screw 34 by yielding coupling 36, the nut 38 of ball screw assembly, is installed on the thrust bearing 33, and rotatablely moving of friction-driven motor 37 becomes rectilinear motion by ball screw assembly, 34; Thrust bearing 33 and mobile anchor clamps 4 are installed on the Mobile Slide 31, Mobile Slide 31 seesaws under the promotion of nut 38, the axial force that the nut of ball screw assembly, produces affacts on the workpiece B by thrust bearing and distance rod, and the close workpiece A of workpiece B also rubs; Mobile anchor clamps 4 are by clamp body 41, fixedly vee-block 42, mobile vee-block 43, lead screw pair 44, shaft coupling 45 and clamping motor 46 are formed, as shown in Figure 7, wherein, clamping motor 46 drives lead screw pair 44 rotations by shaft coupling 45, nut 47 promotes mobile vee-block 43 and moves also clamping work pieces B to fixing vee-block 42, when clamping force reached setting, clamping motor 46 stopped and keeping the output setpoint torque, does not unclamp when guaranteeing work.

Shown in accompanying drawing 2 and accompanying drawing 3, when work, rolling clamp clamping work pieces A, main axis transmission system band workpiece A rotation, mobile clamp workpiece B, friction drive system drives workpiece B and moves to workpiece A from original position, when workpiece A and workpiece B contact friction, when living heat reached uniform temperature, main shaft stopped the rotation fast, and friction drive system axially applies upset force and pressurize, welding finishes the back rolling clamp and unclamps workpiece A, mobile anchor clamps clamping weldment falls back on original position, unclamps weldment and takes out the welding process end.

Claims

1, a kind of all electric friction-welding machine structure, it is characterized in that: the left end at lathe bed is provided with main axis transmission system, is provided with friction drive system at the right-hand member of lathe bed; Wherein main axis transmission system is to be made of main spindle box, main shaft, rolling clamp, core motor, dish spring, profile of tooth belt wheel, pneumohydraulic pressure-cylinder, servo frequency converter, rotary encoder etc., sheathed core motor on main shaft, the drive shaft rotation, front-end of spindle is provided with rolling clamp, and install on the main spindle box, the dish spring is located in the main shaft, the compression stress of dish spring is axially strained collet and clamping work pieces A, be provided with the profile of tooth belt wheel at the main shaft tail end, and utilize 1: 1 ratio transmissions to rotary encoder, and a signal feedback that detects the speed of mainshaft to servo frequency converter; Friction drive system is made up of Mobile Slide, mobile anchor clamps, thrust bearing, ball screw assembly,, motor cabinet, friction-driven motor, yielding coupling etc., the friction-driven motor directly is connected with ball screw assembly, by yielding coupling, the nut of ball screw assembly, is located on the thrust bearing, thrust bearing and mobile anchor clamps are installed on the Mobile Slide, Mobile Slide seesaws under the promotion of nut, and the axial force that the nut of ball screw assembly, produces affacts on the workpiece B by thrust bearing and distance rod.

2, a kind of all electric friction-welding machine structure according to claim 1, it is characterized in that: said mobile anchor clamps be by clamp body, fixedly vee-block, move piece vee-block, lead screw pair, shaft coupling and clamping motor and constituted, wherein, clamping motor is connected with lead screw pair by shaft coupling, the nut of lead screw pair is fixed on the mobile vee-block, and nut promotes mobile vee-block and moves and clamping work pieces B to fixing vee-block.

3, a kind of all electric friction-welding machine structure according to claim 1, it is characterized in that: the another kind of drive mechanism of said main axis transmission system is the structure of spindle drive motor and main shaft direct connection, spindle drive motor directly is connected with the main shaft tail end by yielding coupling, the drive shaft rotation, rotary encoder is located at the motor shaft rear end, rolling clamp adopts from clamping mode, is that the conical surface is connected between collet and the clamp body, and its angle is the self-locking angle.