TW200427536A - Method of controlling sawing in band saw machine - Google Patents

Abstract

This invention relates to a method of controlling sawing in a band saw machine, where information including a preferred cutting rate is set in accordance with various properties of a material to be sawed by means of a PC or a man-machine interface monitor, and the sawing operation is executed through the computation and equipment control by a PLC. When an NC valve is activated to start the sawing operation, a detecting system detects actual feeding rate. The cutting rate computed from the actual feeding rate is compared with the cutting rate as configured. The difference resulted from the comparison is then transmitted as a pulse signal to the NC valve to allow instantaneous regulation of flow rate, so as to change the feeding speed, such that the overall sawing operation can be controlled to steady cutting rate. Accordingly, this invention ensure optimum cutting quality while reducing the damages to workpieces and saw comments, such as saw bands.

Description

200427536 V. Description of the invention (1) [Technical field] The present invention relates to a band saw machine, and more specifically, it refers to a method that can stably and effectively control the actual cutting rate at the close setting when sawing A cutting control method to achieve better cutting quality while reducing damage to workpieces and sawing members. [Previous technology] Pressing and cutting metal cutting machine tools are generally called sawing machines. Depending on the type, they can be divided into reciprocating saws, circular saws, band saws, and wire saws. Among them, the band saw machine is a machine tool that cuts the workpiece with a flat belt type saw blade. Because there is no sawing neutral, the sawing efficiency is high, and it is widely used in many industries. Because the cutting feed of the existing band saw machine is driven by oil pressure, the material is automatically stopped after the material is cut. To ensure the quality and efficiency of the cutting, how to choose a suitable saw band and how to control the sawing of the saw band Speed and feed cutting rate are both important and necessary control factors, especially cutting rate and sawing speed, which affect material cutting speed and quality. [Content] (Technical problems to be solved) However, the existing band saw machines have control over cutting speeds, which are based on the use of basic knowledge of operators for different materials, models, etc., combined with practical experience and judgment. The cutting data required to be given to the machine body is directly input to the control system to control the cutting rate. When the saw speed is a fixed parameter

200427536 V. Description of the invention (2) When counting, the cutting rate = the cutting material is set when the material is a round bar, the rate is suddenly large or small, and the hardness and hardness are maintained. In particular, materials or saw bands and efficiency, there is also a way to increase the cutting speed of the sawing product. The cutting width can only be equal to each hour, and it is not a stable method. It is not equal to the sawing. It may be adjusted for efficiency. The quality and extension and cutting width will affect the cutting X feed speed, but generally the band saw sets a certain value of the feed speed. During the sawing time, the cutting width is fixed, and the cutting rate is stable when the cutting rate is changed. During the fixed cutting width process and the sawing control, the cutting length cannot be maintained in the steady state during the cutting time. The cutting rate can be obtained because of the most suitable. The cost of stagnation and damage; the cutting rate of the component used in this case is the best for each cutting rate, and the most important is that the cutting rate is based on a stable cutting rate. Therefore, it is self-evident that the cutting materials also have the most cutting products. The cutting control of the rattle saw is a constant state. The cutting control is because the cutting material before cutting is fixed and the cutting resistance is different. Quality, and the quality caused by good sawing is eagerly researched by methods. (Technical means to solve the problem) In view of this, the inventor has invented a long-term research and integration of various band saw machines, and invented a method for controlling the saw of the band saw machine, which mainly uses PLC to process the PC The data sent after the setting, when the sawing operation starts, the detection system detects the actual feed speed during sawing, converts the processing to the actual cutting rate, and then makes In comparison, the error proportion is transmitted to the NC valve for flow adjustment control to immediately adjust the feed speed and keep the actual cutting rate in line with the setting.

200427536 V. Description of the invention (3) A cutting control method with a defined cutting rate to obtain better cutting quality. (Comparison with the effect of the prior art) It is known from the above description that the present invention can achieve the following effects compared with the prior art: 1. Can obtain better cutting quality: By the sawing control method of the present invention, the whole The sawing process can be compared with the feedback of the PLC and the detection system at any time. In conjunction with the flow control of the NC valve, it can be accurately and stably controlled at a cutting rate that meets the set value. In this way, the sawing quality can be maintained. , And can get a better sawing effect. 2. It can reduce the cost of cutting processing: As mentioned above, when the tape can be sawed at a smooth and appropriate cutting rate, the quality of the workpiece can be ensured. On the contrary, the workpiece can be reduced due to the sawing conditions. The chance of damage caused by improper settings or errors, and the sawing band applied to the sawing operation can also be maintained in a range of sawing resistance that can withstand or be suitable to maintain its normal or better sawing Service life, so it can effectively reduce the processing costs due to damage to the workpiece or sawing components during the sawing process. [Embodiment] First, please cooperate with the first figure to show the sawing control method of the band saw machine of the present invention. The band saw machine has substantially the same structure as the conventional one, and includes a machine 10, which can be used to clamp the desired sawing. The workpiece 10 is provided with a lifting mechanism 20 on the machine table 10, which can be used to lift a saw frame 40 containing a saw band 30. When the workpiece is to be sawed, the saw band 3 on the saw frame 40 can be started to run. And use oil

200427536 V. Description of the invention (4) The lifting system drives the lifting mechanism 2 〇 drives the saw frame 4 〇 and the saw belt 3 〇 lowering ′, and can pass the running and lowering saw belt 3 〇 to the workpiece required ore Cutting operation 'The present invention also generally performs a silver cutting procedure through the above-mentioned constituent members. As shown in the second figure, it is a block diagram of the sawing control method of the band saw machine of the present invention. The control flow is as follows: A. Data setting First, various data must be determined in advance according to the different workpieces of the sawing material. , The data contains the material shape, material specifications and sawing speed ', where the material shape can be a round rod, a tube or a rectangle; the material j grid can be the diameter, width or height; the sawing speed is the cutting rate and Silver 0 speed, and enter the above information-into the pc or man-machine screen. B. PLC (programmable controller) data calculation processing and equipment operation control: After the data set above is calculated and processed, it is transmitted to the equipment operation control. Among them, the equipment to be controlled mainly includes the lifting mechanism 2 0 With the silver belt 30, the items controlled by it are the lowering speed of the lifting mechanism 20 (that is, the feed speed) and the operating speed of the saw belt 30 (saw belt speed for short). It is clear that the saw belt speed It is a fixed value set in advance. It does not need to be changed during the entire sawing process, and the feed speed is the focus of control. Sub-factory, C one NC valve 50 operation control and execution detection system: after the PLC shell = different operation, it can switch and send a PULSE (pulse) signal to the NC valve 50a binary motor. 'Please cooperate with the third ~ As shown in the five pictures, in order to control the NC valve 50: and then the lowering speed (that is, the feed speed) of the lifting mechanism 2 0, when the Tianye NC valve 50 starts, it indicates that the workpiece sawing process is started.

200427536 V. Description of the invention (5) sequence, at this time, the cutting speed of the actual sawing process can be detected by the detection system (ENCODER detection) to facilitate the calculation of the actual cutting rate, where the cutting rate is determined by the equipment Cutting width after operation (calculated based on data set by the operator based on different material characteristics, such as round rods, whose cutting width is the maximum when sawing to the diameter part) X cutting speed, so it can be used to detect The feed speed obtained by the measurement system is sent to the PLC for calculation to obtain the actual cutting rate of the workpiece. D. Compare the set value and the actual value of the cutting rate: compare the actual cutting rate obtained by the above-mentioned feed rate detected by the actual detection system with the PLC calculation and the original set cutting rate according to the set time. The compared value is then used as the basis for the NC valve 50 flow control. That is, when the set value of the cutting rate is greater than the actual value, it means that the actual cutting rate is too slow. At this time, the PLC will automatically send a PULSE. The signal to the NC valve 50 stepper motor will open the valve a certain amount according to the signal size to increase the flow of hydraulic oil, thereby increasing the feed speed, and the actual cutting rate can be increased to meet the set cutting rate; otherwise, when When the set value of the cutting rate is less than the actual value, it means that the actual cutting rate is too fast. At this time, the PLC will automatically send a PL USE signal to the stepper motor of the NC valve 50, and close the valve according to the signal size. In order to reduce the flow of hydraulic oil, and then reduce the feed speed, the actual cutting rate can be reduced to meet the set cutting rate. E. The NC valve 50 is closed and the sawing is completed: After the workpiece is cut, the signal can be transmitted to the PLC through the touch of the limit switch. A PULSE signal will be transmitted to the stepper motor of the NC valve 50. The valve is closed, making the hydraulic oil unable to circulate, and at the same time, the valve is returned to zero, ending the entire sawing flow.

200427536

V. Description of Invention (6) Process. Please cooperate with the third to fifth figures as shown in the NC valve structure used in the present invention. The NC valve 50 can be installed in the appropriate position of the band saw machine and connected to the oil circuit system of the lifting mechanism 20 It is used to control the raising and lowering of the lifting mechanism 20. Among them, the NC valve 50 includes a fixed seat 5 1 which can be locked on the band saw machine, and then fixed on the fixed seat 51 with a core. Shaft 5 2 1

A stepping motor 5 2, the mandrel 5 2 1 is provided with an internal screw 5 3, and a screw stem 5 4 is provided on the outer screw of the screw 5 3. The valve rod 5 4 is sequentially provided with an oil outlet 5 in order. The oil inlet valve sleeve 5 5 of 5 1 and an oil inlet valve 5 6 of the oil inlet 5 6 1 are locked on the outer side wall of the oil inlet valve sleeve 5 6 and can fit with the ends of the valve stem 5 4 A ring 5 7 and a fixing sleeve 5 8 are provided. A predetermined deep channel 5 4 1 is axially recessed at a predetermined position of the shaft of the valve stem 5 4. When the step shaft 5 2 is a mandrel 5 2 1 Rotate the drive screw 5 3 When the valve stem 5 4 is moved back and forth, the flow channel 5 4 Jl on the valve stem 5 4 can be controlled as the connecting channel between the oil inlet 5 6 1 and the oil outlet 5 5 1 in time. It can achieve the adjustment and control functions of the hydraulic oil flow, opening and closing. In addition, the outside of the fixing sleeve 5 8 can also be locked with a proximity switch 5 9.

Provide the position adjustment of the valve stem 54 when it returns to zero. As mentioned above, when the PLC sends a PULSE signal to the stepper motor 5 2 of the NC valve 50, the spindle 5 2 1 of the stepper motor 5 2 will Rotate the indirect drive valve stem 5 4 according to the signal to reduce the gap of the flow path forward or increase the gap of the flow path backward to control the amount of hydraulic oil flow, and then change the lowering speed of the lifting mechanism 20 (that is, the feed speed). In order to achieve the purpose of adjusting and controlling the cutting rate. To sum up, the "saw cutting control method of the band saw machine" of the present invention

Page 10 200427536 V. Description of the invention (7) Provides a method that can stably and effectively control the actual cutting rate during sawing to close to the set cutting rate to achieve better sawing quality and reduce damage to the workpiece and the sawing member The sawing control method makes the overall industrial applicability and cost-effectiveness, and its technical content has not been seen in books or publications. It is in line with the requirements of the invention patent application. Prayer. For those who need to know, the above are the actual embodiments of the present invention and the technical principles used. If the changes are made according to the concept of the present invention, the functions and functions produced by them will not exceed those covered by the description and drawings. When it comes to spirit, they should all be within the scope of the present invention and shared with Chen Ming.

200427536 Brief description of the drawings The first diagram is an external plan view of the band saw machine of the present invention. The second figure is a block diagram of the sawing control method of the present invention. The third figure is an appearance combination diagram of the NC valve of the present invention. The fourth figure is an exploded perspective view of the NC valve of the present invention. The fifth figure is a combined sectional view of the NC valve of the present invention. (Illustration of drawing number) 1 · 3 0 · 5 0 · 4 7 Machine saw band NC valve fixed seat spindle valve stem valve sleeve inlet valve sleeve washer proximity switch 2 0 4 0 4 5 8 Lifting mechanism is wrong Frame stepper motor screw runner oil inlet inlet fixing sleeve

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Claims (1)

200427536 Six patent application scopes 1 n Mining control methods with mining machine 'The method steps are: A. Data setting: Set various materials on the PC or man-machine screen with mining machine, including material shape, material specifications, recording Cutting speed; of which, the shape can be round rod, tube or rectangle; the material specification can be straight, " 2 material or height; the cutting speed can be cutting rate and saw speed; see degree B 、 PLC (programmable controller) data calculation processing and equipment movement ^ After the above-mentioned data are processed, they are transmitted to the belt silver two, and the operation control is performed to start the lifting mechanism to lower and saw the sawing operation of the lamp; φ 哫 Turn U to perform NC valve operation control and execution detection system: when sawing action becomes jealous ^ ^ ^ .NC Λ ^ ^ ^ PULSE (^ W) m ^ and then control the advance of the mine belt = up to control the time The hydraulic oil flow can be started. At the same time, the detection system on the belt mining machine is also the actual feed speed in the recovery of the feed rate / the actual cutting rate obtained by the detection; Bay LC performs data calculations. To get the D of the workpiece and compare the cutting # A The cutting rate and cutting value set by the cutting rate are compared. The actual cutting-pulse signal to Nc ^ is compared with the PLC, and the actual cutting rate is controlled according to the error rate. Precise flow adjustment and control to close E and NC valves, Green 7: cutting rate set in total; send ~ pulse signal to = Fan Cheng · When the workpiece sawing is completed, 'The PLC will pass the valve to zero, and it will be closed. Valve to block the flow of hydraulic oil and make use of: above: cutting and sawing process; manufacturing method to make the actual cutting of the entire sawing process 200427536 6. Patent application scope cut rate can be detected, feedback and Flow adjustment control and other processes, while maintaining the set cutting rate and obtaining the best cutting quality, while reducing the probability of damage to the workpiece and sawing components. 2. According to the silver cutting control method of the band saw machine according to item 1 of the scope of the patent application, wherein the NC valve system can be installed at an appropriate position of the band saw machine, and used with the saw machine to control the speed of the blade feeding speed. The lifting mechanism communicates with the oil circuit, and the NC valve includes a fixed seat that can be locked on the band saw machine. The fixed seat is locked with a stepping motor with a mandrel. The mandrel has a screw. A valve stem is provided on the outside of the screw. The valve stem is sequentially sleeved with an oil outlet valve sleeve with an oil outlet and an oil inlet valve sleeve with an oil inlet, and is fixed on the outer side wall of the oil inlet valve sleeve. A washer and a fixing sleeve that can be fitted to the end of the valve stem, and a predetermined deep channel is formed in the axial direction of the predetermined position of the shaft of the valve stem, so that the stepper motor can control the rotation of the spindle after receiving the PLC pulse signal The driving screw drives the valve stem to move forward or backward, thereby controlling whether the flow passage on the valve stem is connected to the oil inlet and the oil outlet, or the size of the flow passage gap, and can indirectly control the feed speed of the saw blade. 3. The cutting control method of the band saw machine according to item 2 of the scope of the patent application, wherein the outer side of the fixing sleeve of the NC valve can lock a proximity switch, and the proximity switch and the end of the valve stem are sensed through the proximity switch To adjust the valve stem to zero position. 4. The sawing control method of the band saw machine according to item 1 or 2 of the scope of the patent application, wherein when the set value of the cutting rate is greater than the actual value, the PLC will send a pulse signal to the stepper motor of the NC valve To control the forward displacement of the valve stem to reduce the flow of hydraulic oil, thereby reducing the feed speed, 200427536 6. When the range of patent application is applied and the set value of the cutting rate is less than the actual value, the PLC sends a pulse signal to the stepper motor of the NC valve to control the backward retraction displacement of the valve stem to increase the flow of hydraulic oil, thereby Increase the feed speed.