1. Introduction In recent years, with the development of motor permanent magnet materials and synchronous motor control technology, servos have been widely used in machine tools, packaging, textiles, wire processing, and electronics manufacturing industries due to their fast response and high precision motion control performance. Thanks to the wide application of servo technology, the spring manufacturing machinery (hereinafter referred to as the spring machine) has been converted from a purely mechanical structure to an electrical servo structure in the past. After the transformation, the production speed has been greatly improved, and the manufactured spring performance parameters have been greatly improved. , And equipment installation and maintenance is very convenient, but also to avoid the deterioration of product performance caused by the long-term wear of mechanical parts. In this paper, a conspicuous spring (battery spring) process example was produced by a well-known spring machine factory in Dongguan with Inventronics CHS100 servo drive. The usage of Inventronics CHS100 servo drive in the spring manufacturing machine was described in detail, and the excellent control performance of Inventronics CHS100 servo drive was explained. It can fully meet the requirements of precise, fast, stable and reliable spring manufacturing process. 2. Spring machine structure and spring forming process Spring machine consists of four parts: operation display, controller, servo driver and servo motor, and mechanical structural components (such as gears, cams, cutters, pressure rollers, etc.). The front appearance is shown in Figure 1. . The controller is the core brain of the spring machine. The servo driver and servo motor are the arms of the device. The controller provides the programming interface to allow the user to set the process parameters according to the required spring requirements. The controller sends the motion control instructions to the servo driver according to these process parameters. The servo motor drives the load to meet the user under the control of the servo driver. The required process. Figure 1 appearance of the spring machine equipment spring is formed under the joint action of the servo drive and mechanical parts, the main mechanical parts shown in Figure 2, the electrical part consists of three parts camshaft, feed spool, roll core shaft, camshaft Responsible for cutting off the tool, the feeding spool is responsible for the movement of the spring wire, because the battery spring manufacturing process is relatively simple, the spring pitch does not change, the spring shape is single, so the device is not loaded core shaft. Figure 2 spring forming process mechanical parts schematic diagram spring forming process block diagram shown in Figure 3, the basic process is described as follows: Before the operation of the camshaft first zero, the camshaft under the action of the mechanical cam to bring the tool knife, the camshaft in single step From the set start angle to the end angle, the feed spool feeds the wire according to the set one-step feed wire value, the spring wire presses on the feed wire presser and the guide of the fine groove of one of the tool tips and the other Under the joint action of the tool tip oblique shawl guide, the wire is formed forward and the length of the feed wire reaches the set value. The camshaft drives the tool under the action of the mechanical cam to cut off the steel wire to produce a spring, and then The next cycle of work is done so that the battery springs are produced one after the other. Process requirements: In mass production, the spring length error ≤ 0.1mm, the spring pitch error ≤ 0.05mm, and can be continuously produced, steel wire can not be slotted or chopped spring halfway. This has a higher requirement on the positioning accuracy and response time of the servo, and it also requires the servo shaft to start and stop quickly and the servo shaft must not be shaken when stopped. Fig. 3 Schematic diagram of the spring forming process 3. Debugging process Machinery and equipment: CHS100-1R0-2 2 and 2 matched motors, respectively used as camshaft and feed spool. Since the device controller is an encoder 2000 line system, the machine equipment is a specially customized non-standard machine. From the process of spring forming process, the spring parameters produced, such as spring length, pitch, etc., are not only closely related to the servo control performance, but also related to the program parameters and tool depth. We ask the experienced master to debug well. After the tool and parameters are set, the debugging of the servo control performance in the equipment is emphasized. The equipment has a detection mode for single-axis operation and debugging. According to the user's requirements, the camshaft positioning control accuracy is adjusted to within 0.01°, the delivery spool displacement accuracy is adjusted to within 0.05mm, and the rigidity also meets the user's requirements. After that, the linkage debugging of the camshaft and the feeding axis was performed. The program parameters set in the controller are shown in the following table: N X1 X2 Y YF Z 0 0.0 0.0 400 100 0 1 7.0 74.3 20 0 0 2 83.3 96.9 6.0 0 0 3 97.2 200.5 33.0 0 0 4 286.0 313.0 6.0 0 0 5 225.0 257.0 6.0 0 0 6 260.0 270.0 2.0 0 0 In the table: N: Program line number X1: Starting angle of the camshaft X2: End angle of the camshaft Y: Single-feed length YF: Length of the auxiliary feeding line in the equipment operating mode When the production speed is 150 pcs/min, the produced spring parameters meet the requirements. When the production speed is increased to 300 to 400 pcs/min, it is found that during the production process, the spring steel wire is grooved to cause the falling knife to cut continuously or chop the spring. , It should be caused by the position overshoot of the feed spool motor when the servo motor is stopped. Use the position gain function of the servo driver of the feed spool to slowly debug the loop parameters until the phenomenon is gradually eliminated. The main parameters of the servo drive are as follows: Camshaft servo driver: Function code parameter parameter value PA.01 Mode selection 0 (position mode) PA.04 1st electronic gear molecule 1 PA.05 2nd electronic gear denominator 3 PA.06 pulse Input form 0 (pulse + direction) Pb.01 1st position gain 500 Pb.04 1st speed gain 2500 Pb.05 1st speed integral 80 Pc.55 Encoder pulse output frequency division coefficient 1 Pc.56 encoder Pulse Output Divisor Factor Denominator 1 Feed Spool Servo Driver: Function Code Parameter Value PA.01 Mode Selection 0 (Position Mode) PA.04 1st Electronic Gear Moleculor 1 PA.05 2nd Electronic Gear Denominator 5 PA.06 Pulse Input Form 0 (pulse + direction) Pb.01 1st position gain 800 Pb.04 1st speed gain 1500 Pb.05 1st speed integral 180 Pb.06 2nd position gain 1300 Pb.07 2nd speed gain 2500 Pb. 08 2nd speed integral constant 1000 Pb.17 Gain switching condition 5 Pb.18 Gain switching threshold 50 Pc.55 Encoder pulse output frequency division coefficient numerator 1 CHS100-1R0-2 Servo Drive and Its Matching Motor Application Spring machines, equipment produced by the spring fully meet the requirements, the fastest production speeds of up to 500 / min, and has been continuous trouble-free operation for three months, deeply affirmed. Before this manufacturer used a well-known Japanese brand servo, but the cost is higher, now the domestic servo brand is quietly rising, our servo driver applied to the performance of the spring machine has reached the level of Japanese brands, is at the leading domestic level.
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