CN112404153B - Selection and control method of wire drawing unit in non-slip wire drawing machine - Google Patents
Selection and control method of wire drawing unit in non-slip wire drawing machine Download PDFInfo
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- CN112404153B CN112404153B CN202010999793.8A CN202010999793A CN112404153B CN 112404153 B CN112404153 B CN 112404153B CN 202010999793 A CN202010999793 A CN 202010999793A CN 112404153 B CN112404153 B CN 112404153B
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- wire drawing
- drawing unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
- B21C1/12—Regulating or controlling speed of drawing drums, e.g. to influence tension; Drives; Stop or relief mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
- B21C1/04—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums with two or more dies operating in series
Abstract
The invention provides a selection and control method of a wire drawing unit in a non-slip wire drawing machine, wherein a wire drawing part of the non-slip wire drawing machine comprises N wire drawing units, N is more than or equal to 1, and N is an integer; the method comprises the following steps: according to requirements, selecting any h wire drawing units in a wire drawing part of the non-slip wire drawing machine, wherein h is more than or equal to 1 and less than or equal to N, and h is an integer, in each selected wire drawing unit, according to a threading sequence from front to back, the last wire drawing unit becomes an active driving wire drawing unit, the rotating speed of a driving wheel of the active driving wire drawing unit is a set value, and the rest wire drawing units in each selected wire drawing unit are driven wire drawing units; calculating the rotating speed of the driving wheel of each driven driving wire drawing unit in each selected wire drawing unit; and giving the calculated rotating speed of the driving wheel in each driven wire drawing unit to a servo motor for controlling the driving wheel. According to the method, all the wire drawing units in the wire drawing part can be combined at will, and the wire drawing units and the number of the wire drawing units can be selected at will according to actual requirements.
Description
Technical Field
The invention relates to the technical field of non-slip wire drawing machines, in particular to a selection and control method of a wire drawing unit in a non-slip wire drawing machine.
Background
The fine non-slip wire drawing machine (non-slip wire drawing machine) is used for drawing various fine wires, has low requirements on an eye die, and has good surface quality of the drawn wires because no slip exists between a driving wheel and the wires. The structure of the micro non-slip wire drawing machine is shown in figure 1, the drawing of the wire rod is controlled by the swing of the tension swing rod, each independent driving wheel is strictly synchronous with the wire drawing speed, the sliding friction is not easy to generate between the wire rod and the driving wheels, and the non-slip drawing is realized; the non-slip drawing makes the stress uniform when the wire is shaped and deformed, can inhibit the surface of the wire from being scratched or broken, and can be operated at high speed. The superfine non-slip wire drawing machine is specially used for drawing superfine wires and has the characteristics of high surface quality and small tension.
The wire drawing section of the non-slip wire drawing machine generally includes several wire drawing units, the wire drawing section of the non-slip wire drawing machine shown in fig. 1 includes ten wire drawing units, and fig. 2 is a structural view of one wire drawing unit. Each wire drawing unit comprises an eye die wire inlet wheel 13, an eye die wire outlet wheel 14, an eye die groove 15 for placing and lubricating an eye die, a driving wheel 16, a driven wheel 17, a set of tension mechanism 18 and a swing rod 19.
In the prior art, the tenth drawing unit (i.e. the last drawing unit of the drawing part) is an active driving drawing unit, which operates at a constant speed at a set speed and is not controlled by a swing rod. The other nine wire drawing units are driven wire drawing units, and the rotating speed can be adjusted through the swinging of the tension swing rod, so that the non-slip driven wire drawing is realized.
When the non-slip wire drawing machine in the market is used, only a few wire drawing units can be continuously selected from the back to the front, the wire drawing units cannot be selected at intervals, and the last wire drawing unit must be selected. Taking the drawing part comprising ten drawing units as an example, the combination mode of each drawing unit of the drawing part of the non-slip drawing machine on the market is as follows:
1) when ten eye dies are used, the first to ten wire drawing units are selected;
2) when nine eye dies are used, selecting the second to ten wire drawing units;
3) when eight eye dies are used, selecting a third wire drawing unit to a tenth wire drawing unit;
……
10) when one eye die is used, the tenth drawing unit is selected.
When only one drawing unit is used, only the 10 th drawing unit (active driving drawing unit) can be used; when two are used, only the ninth wire drawing unit and the tenth wire drawing unit can be used; when three are used, only the eighth wire drawing unit, the ninth wire drawing unit and the tenth wire drawing unit can be used.
The fine non-slip wire drawing machine draws the fine wire, the hole of the eye die is very small, so the eye die is difficult to thread, the time is long, and the wire is easy to break. In the process of actually using the existing non-slip wire drawing machine on the market, the following situations generally occur:
in the first case: for example, a wire intended to be produced requires a total of ten drawing units. However, when the wire is threaded to the eighth wire drawing unit, due to the uncertainty of the wire and the eye die, the wire is frequently broken or the eye die cannot finish the threading. The existing non-slip wire drawing machine cannot directly skip two wire drawing units behind and is changed into eight-eye die operation. Only eight threaded eye molds can be removed, the eye molds are taken out of the eye mold grooves and are sequentially translated into the subsequent eye mold grooves, the threaded silk threads are cut off, and the molds are threaded again. And because the silk thread is too thin, the fine wire is difficult to thread through the eye die, and the mode is time-consuming and labor-consuming, so that the production efficiency is reduced.
In the second case, when the user uses the fine non-slip wire drawing machine, the number of the wire drawing units used is uncertain, and sometimes only a few of the wire drawing units are used, especially when drawing the plating wire, sometimes even only one wire drawing unit is used for drawing because of the different thicknesses of the plating layers. The existing non-slip wire drawing machine on the market can only select k forward continuous wire drawing units from the last active driving wire drawing unit, and the last active driving wire drawing unit is required to be used no matter a plurality of wire drawing units are used. This results in a high frequency of use of the following drawing units and a severe wear of the drive wheels. The fine non-slip wire drawing machine draws the fine wires and has high requirements on the surface quality of the wires. Therefore, the following wire drawing units need frequent replacement of the driving wheel, which increases the maintenance cost of the equipment and reduces the production efficiency.
In the third case: since the selection method of the combination of the drawing units of the prior art non-slip drawing machine must be selected from the tenth drawing unit at the rearmost, when a plurality of drawing units are selected, the adjacent drawing units must be selected in sequence. When testing the wire rod of new material, because the uncertainty of new silk thread material, can not confirm required wire drawing unit quantity, need the user to estimate the selected mode of wire drawing unit combination, if the condition of estimating is not conform with actual conditions, can only fall the line of wearing and rethread, and more or less add the eye module and can only translate the eye module, just can fall the silk thread of wearing once the translation eye module is rethread. The fine wire is too thin, so that the eye die is difficult to thread, and the threading is time-consuming and labor-consuming again.
In a fourth case: when the tenth (last) drawing unit fails, the entire apparatus cannot operate.
Disclosure of Invention
In order to solve the problems in the prior art, the application provides a selection and control method of wire drawing units in a non-slip wire drawing machine, so that all the wire drawing units in a wire drawing part can be combined at will, and the number of the wire drawing units can be selected at will according to actual requirements.
In order to achieve the above object, the present application proposes a method for selecting and controlling a wire drawing unit in a non-slip wire drawing machine, comprising the steps of: wherein, the wire drawing part of the non-slip wire drawing machine comprises N wire drawing units, N is more than or equal to 1, and N is an integer;
step 1, selecting any h wire drawing units in a wire drawing part of a non-slip wire drawing machine according to requirements, wherein h is more than or equal to 1 and less than or equal to N, and h is an integer, in each selected wire drawing unit, according to a threading sequence from front to back, the last wire drawing unit becomes an active driving wire drawing unit, the rotating speed of a driving wheel of the active driving wire drawing unit is a set value and is not controlled by a swing rod of the wire drawing unit, and the rest wire drawing units in each selected wire drawing unit are driven driving wire drawing units;
And 4, according to the second flow equal principle, the linear velocity relationship between two adjacent wire drawing units in each wire drawing unit is selected as follows:
wherein, Vm-1Indicating the linear velocity of the (m-1) th drawing unit selected; vmIndicating the linear velocity of the selected m-th drawing unit; when m is h, VhThe linear velocity of the last wire drawing unit in each wire drawing unit is shown, the last wire drawing unit is an active driving wire drawing unit, the rotating speed of a driving wheel is a known quantity, and the relationship between the linear velocity of the wire drawing unit and the rotating speed of the driving wheel of the wire drawing unit is used for representing the linear velocity of the last wire drawing unit in each selected wire drawing unit
Calculating the linear velocity V of the last wire drawing unithWherein n ismIndicating the rotational speed of the drive wheel of the selected m-th drawing unit, dmRepresents the diameter of the driving wheel of the selected m-th drawing unit, which is a known quantity; thus according to VhThe linear velocity of the previous wire drawing unit adjacent to the last wire drawing unit in each selected wire drawing unit can be calculated, and by analogy, the V can be calculatedmWhen m is 1, V0Corresponding to the linear speed of the pay-off unit;
and 6, giving the calculated rotating speed of the driving wheel in each driven wire drawing unit to a servo motor for controlling the driving wheel.
In some embodiments, step 7 is further included, the rotation speed of the driving wheel in the drawing unit is adjusted through the swing rod in each driven and driven drawing unit.
The scheme has the advantages that all the wire drawing units in the wire drawing part can be combined randomly by the selection and control method of the wire drawing units in the non-slip wire drawing machine, and the number of the wire drawing units can be selected randomly according to actual requirements. The method has the following advantages: 1) the selection of the wire drawing units becomes easy and flexible, especially for new materials, when the mechanical properties of the materials are not known sufficiently and a plurality of wire drawing units can be used, the wires can be sequentially threaded backwards from the wire drawing units in front, and the wire drawing operation can be carried out no matter which wire drawing unit is selected for threading; 2) the wire drawing units can be combined and used at will, so that the driving wheel and each wire guide wheel can be worn uniformly, the service life of the wire guide wheel can be prolonged, and the surface quality of a wire rod is improved; 3) the last wire drawing unit in the wire drawing part is defined as the only active driving wire drawing unit without fixing, but the last wire drawing unit in the selected wire drawing unit is defined as the active driving wire drawing unit, so that the wire drawing unit is more flexible, and when a certain wire drawing unit goes wrong, the wire drawing unit can be skipped in time and replaced by other units, and the production cannot be influenced.
Drawings
Fig. 1 shows a schematic structure of a prior art non-slip wire drawing machine.
Fig. 2 shows a schematic structural view of a drawing unit in the prior art.
Reference numerals: 1-a first wire drawing unit; 2-a second wire drawing unit; 3-a third wire drawing unit; 4-a fourth wire drawing unit; 5-a fifth wire drawing unit; 6-a sixth wire drawing unit; 7-a seventh wire drawing unit; 8-an eighth wire drawing unit; 9-a ninth wire drawing unit; 10-a tenth wire drawing unit; 11-a paying-off part; 12-a wire take-up portion; 13-eye mould wire feeding wheel; 14-an eye mould wire outlet wheel; 15-eye die cavity; 16-a drive wheel; 17-a driven wheel; 18-a tension mechanism; 19-swing link.
Detailed Description
The following examples are provided to further illustrate the embodiments of the present application.
The application relates to a method for selecting and controlling a wire drawing unit in a non-slip wire drawing machine, which comprises the following steps: wherein, the wire drawing part of the non-slip wire drawing machine comprises N wire drawing units, N is more than or equal to 1, and N is an integer;
step 1, selecting any h wire drawing units in a wire drawing part of the non-slip wire drawing machine according to requirements, wherein h is more than or equal to 1 and less than or equal to N, and h is an integer, in each selected wire drawing unit, according to a threading sequence from front to back, the last wire drawing unit becomes an active driving wire drawing unit, the rotating speed of a driving wheel of the active driving wire drawing unit is a set value and is not controlled by a swing rod of the wire drawing unit, and the rest wire drawing units in each selected wire drawing unit are driven wire drawing units.
For example, two drawing units are needed for drawing the palladium-plated wire, only the last two drawing units can be fixedly selected in the prior art, two drawing units can be arbitrarily selected in all the drawing units in the method, and the last drawing unit in the selected two drawing units is an active driving drawing unit. In a specific application, each time a certain wire is drawn, the combination of the wire drawing units and the number of the wire drawing units selected depend on the requirements.
The non-slip wire drawing machine can select/prohibit the wire drawing unit at will by turning on/off the enable switch of the corresponding wire drawing unit. And the swing rod of the unselected wire drawing unit falls down, and the swing rod cannot control the driving wheel of the corresponding wire drawing unit to rotate and is in a forbidden state. The selected wire drawing unit is in an enabling state, and the swing rod of the wire drawing unit can control the rotating speed of the driving wheel corresponding to the wire drawing unit. However, the last wire drawing unit in the selected wire drawing units becomes an active driving wire drawing unit, and the rotating speed of the driving wheel is set by the main machine and is not controlled by the swing rod of the wire drawing unit. The other wire drawing units in the selected wire drawing units are driven wire drawing units, the rotating speed of the driving wheel of each driven wire drawing unit can be obtained through calculation, and the rotating speed of the driving wheel can be adjusted through the swing rod of each wire drawing unit, so that the synchronous operation among the wheels is achieved. The following steps are processes of finding the rotation speed of the driving wheel of each driven wire drawing unit.
The wire diameter refers to the outgoing wire diameter of the wire drawing unit, and the incoming wire diameter of each wire drawing unit is the outgoing wire diameter of the previous wire drawing unit, so the outgoing wire diameter is used as a measurement parameter of each wire drawing unit and is recorded as the wire diameter.
And 4, according to the second flow equal principle, the linear velocity relationship between two adjacent wire drawing units in each wire drawing unit is selected as follows:
wherein, Vm-1Indicating the linear velocity of the (m-1) th drawing unit selected; vmIndicating the linear velocity of the selected m-th drawing unit; when m is h, VhThe linear velocity of the last wire drawing unit in each wire drawing unit is shown, the last wire drawing unit is an active driving wire drawing unit, the rotating speed of a driving wheel is a known quantity, and the relationship between the linear velocity of the wire drawing unit and the rotating speed of the driving wheel of the wire drawing unit is used for representing the linear velocity of the last wire drawing unit in each selected wire drawing unit
Calculating the linear velocity V of the last wire drawing unithWherein n ismIndicating the rotational speed of the drive wheel of the selected m-th drawing unit, dmRepresents the diameter of the driving wheel of the selected m-th drawing unit, which is a known quantity; thus according to VhThe linear velocity of the previous wire drawing unit adjacent to the last wire drawing unit in each selected wire drawing unit can be calculated, and by analogy, the V can be calculatedm. When m is 1, V0Corresponding to the linear speed of the pay-off unit.
And 6, giving the calculated rotating speed of the driving wheel in each driven wire drawing unit to a servo motor for controlling the driving wheel.
Step 7 of adjusting the rotating speed of the driving wheel in the wire drawing unit through the swing rod in each driven driving wire drawing unit can also be provided.
In the driven wire drawing unit, when the wire outlet length behind the eye die of the wire drawing unit changes due to the reasons of wire rod inhomogeneity, eye die abrasion, eye die blockage and the like, the change of the wire can be quickly tracked through the physical buffering of the oscillating bar in the wire drawing unit. And then driving an angle sensor through a swing rod, and finely adjusting the rotating speed of the driving wheel on the basis of the rotating speed of the driving wheel in the step 6. When the swing rod rises, the rotating speed of the corresponding driving wheel is increased, and when the swing rod falls, the rotating speed of the corresponding driving wheel is reduced. Through the adjustment, the position of the swing rod can be kept unchanged at the set position, so that the non-slip control is realized, no sliding friction and only static friction exist between the wire and the guide wheel, and the wire is pulled out of the eye die by the driving wheel through the static friction force.
The selection and control method of the wire drawing units in the non-slip wire drawing machine can be used for randomly combining all the wire drawing units in the wire drawing part, and the number of the wire drawing units can be randomly selected according to actual requirements. The method has the following advantages: 1) the selection of the wire drawing units becomes easy and flexible, especially for new materials, when the mechanical properties of the materials are not known sufficiently and a plurality of wire drawing units can be used, the wires can be sequentially threaded backwards from the wire drawing units in front, and the wire drawing operation can be carried out no matter which wire drawing unit is selected for threading; 2) the wire drawing units can be combined and used at will, so that the driving wheel and each wire guide wheel can be worn uniformly, the service life of the wire guide wheel can be prolonged, and the surface quality of a wire rod is improved; 3) the last wire drawing unit in the wire drawing part is defined as the only active driving wire drawing unit without fixing, but the last wire drawing unit in the selected wire drawing unit is defined as the active driving wire drawing unit, so that the wire drawing unit is more flexible, and when a certain wire drawing unit goes wrong, the wire drawing unit can be skipped in time and replaced by other units, and the production cannot be influenced.
Claims (2)
1. A method for selecting and controlling a wire drawing unit in a non-slip wire drawing machine is characterized by comprising the following steps: the method comprises the following steps:
wherein, the wire drawing part of the non-slip wire drawing machine comprises N wire drawing units, N is more than or equal to 1, and N is an integer;
step 1, selecting any h wire drawing units in a wire drawing part of a non-slip wire drawing machine according to requirements, wherein h is more than or equal to 1 and less than or equal to N, and h is an integer, in each selected wire drawing unit, according to a threading sequence from front to back, the last wire drawing unit becomes an active driving wire drawing unit, the rotating speed of a driving wheel of the active driving wire drawing unit is a set value and is not controlled by a swing rod of the wire drawing unit, and the rest wire drawing units in each selected wire drawing unit are driven driving wire drawing units;
step 2, according to the material of the wire drawing material, setting the eye model surface reduction rate R of each selected wire drawing unitmM is not less than 1 and not more than h, m is an integer, and when m is 1, R is1Representing the eye die reduction ratio of the first drawing unit selected, and so on, when m is h, RhRepresenting the eye die reduction ratio of the last drawing unit selected, the eye die reduction ratio R of each drawing unit selectedmIs a known quantity;
step 3, according to the formula
Calculating the wire diameter of each selected wire drawing unit, wherein DmDiameter of wire for selected m-th drawing unit, Dm-1D is the wire diameter of the (m-1) th wire drawing unit selected, when m is equal to 10The diameter of the pay-off wire corresponding to the pay-off unit is a known quantity according to D0Can calculate D1By analogy, D can be calculatedm；
And 4, according to the second flow equal principle, the linear velocity relationship between two adjacent wire drawing units in each wire drawing unit is selected as follows:
wherein, Vm-1Indicating the linear velocity of the (m-1) th drawing unit selected; vmIndicating the linear velocity of the selected m-th drawing unit; when m is h, VhThe linear velocity of the last wire drawing unit in each wire drawing unit is shown, the last wire drawing unit is an active driving wire drawing unit, the rotating speed of a driving wheel is a known quantity, and the relationship between the linear velocity of the wire drawing unit and the rotating speed of the driving wheel of the wire drawing unit is used for representing the linear velocity of the last wire drawing unit in each selected wire drawing unit
Calculating the linear velocity V of the last wire drawing unithWherein n ismIndicating the rotational speed of the drive wheel of the selected m-th drawing unit, dmRepresents the diameter of the driving wheel of the selected m-th drawing unit, which is a known quantity; thus according to VhCan calculateThe linear velocity of the previous wire drawing unit adjacent to the last wire drawing unit in each selected wire drawing unit is obtained, and by analogy, the V can be calculatedmWhen m is 1, V0Corresponding to the linear speed of the pay-off unit;
step 5, according to the relation between the linear speed of the wire drawing unit and the rotating speed of the driving wheel of the wire drawing unit
Calculating the rotating speed of a driving wheel of each driven wire drawing unit in each selected wire drawing unit;
and 6, giving the calculated rotating speed of the driving wheel in each driven wire drawing unit to a servo motor for controlling the driving wheel.
2. The method for selecting and controlling a wire drawing unit in a non-slip wire drawing machine according to claim 1, wherein: and 7, regulating the rotating speed of a driving wheel in each wire drawing unit by using a swing rod in each driven wire drawing unit.
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| CN202010999793.8A CN112404153B (en) | 2020-09-22 | 2020-09-22 | Selection and control method of wire drawing unit in non-slip wire drawing machine |
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| CN202010999793.8A CN112404153B (en) | 2020-09-22 | 2020-09-22 | Selection and control method of wire drawing unit in non-slip wire drawing machine |
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| CN112404153B true CN112404153B (en) | 2022-05-10 |
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| CN113245385B (en) * | 2021-04-22 | 2023-03-17 | 东莞科力线材技术有限公司 | Control system and method for wire drawing machine |
| CN115971274B (en) * | 2023-02-13 | 2024-02-09 | 科城铜业(英德)有限公司 | Improvement process for reducing breakage rate of superfine wire |
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