CN116652068B - Cam-free tool rest for numerical control spring machine - Google Patents
Cam-free tool rest for numerical control spring machine Download PDFInfo
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- CN116652068B CN116652068B CN202310730058.0A CN202310730058A CN116652068B CN 116652068 B CN116652068 B CN 116652068B CN 202310730058 A CN202310730058 A CN 202310730058A CN 116652068 B CN116652068 B CN 116652068B
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 230000008859 change Effects 0.000 claims description 28
- 238000011156 evaluation Methods 0.000 claims description 21
- 230000007547 defect Effects 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000011159 matrix material Substances 0.000 claims description 15
- 238000003754 machining Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000012806 monitoring device Methods 0.000 claims description 6
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- 230000001133 acceleration Effects 0.000 claims description 3
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- 239000002184 metal Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 6
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F35/00—Making springs from wire
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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
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F11/00—Cutting wire
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention relates to the technical field of spring processing equipment, in particular to a cam-free tool rest for a numerical control spring machine, which comprises a base, a servo motor module, a tool clamping part, a sliding table, a first output shaft, a second output shaft, an electromagnetic module and a control system, wherein the base is provided with a cam-free tool rest; the cutter clamping component is divided into a left clamping part and a right clamping part, and is respectively provided with a first pressure detection device and a second pressure detection device; the control system is capable of adjusting the operating state of each component. According to the invention, the cutter clamping component is connected with the servo motor module, so that the purpose of automatically clamping the cutter holder is achieved, the rotating speed of the servo motor module is regulated in real time through pressure detection in the cutter holder clamping process, the cutter clamping component can smoothly and accurately clamp the cutter, and meanwhile, the cutter clamping component and the sliding table are fixed through the electromagnetic device.
Description
Technical Field
The invention relates to the technical field of spring processing equipment, in particular to a cam-free tool rest for a numerical control spring machine.
Background
The spring is one of basic mechanical parts, and has wide application in various fields of national economy and social life, so that the spring machine is developed, however, in the operation and forming process of the traditional cam spring machine, the claw arms of the equipment rotate clockwise or anticlockwise in sequence, the non-selected claw arms still do work, such idle work causes delay of operation time, the working mode of the cam spring machine is single, the types of the springs which can be manufactured are limited, and the cam spring machine is not suitable for producing various complicated special-shaped springs
Chinese patent publication No.: CN208613636U discloses a cam-free spring machine knife holder mechanism, including knife holder actuating mechanism and knife holder subassembly, its characterized in that: the tool apron driving mechanism comprises a driving device, a sliding rail connecting plate and a sliding rail bottom plate, the sliding rail connecting plate is driven by the driving device to reciprocate back and forth along the sliding rail bottom plate, the tool apron assembly comprises a tool rest seat, a movable tool rest and a tool bit, the tool rest seat is arranged on the sliding rail connecting plate, the two sides of the upper part of the tool rest seat are respectively fixed with the movable tool rest and the movable tool rest cover plate, and the top of the front end of the movable tool rest is fixed with the tool bit through a tool bit pressing piece.
The current cam-free spring machine tool rest mostly adopts the traditional machine tool changing mode, and the tool changing time is long, and the product processing speed is influenced.
Disclosure of Invention
Therefore, the invention provides a cam-free tool rest for a numerical control spring machine, which is used for solving the problems that the current cam-free spring machine tool rest in the prior art mostly adopts a traditional machine tool changing mode, the tool changing time is long, and the processing speed of products is influenced.
In order to achieve the above purpose, the invention provides a cam-free knife rest for a numerical control spring machine, comprising,
the base is arranged on the numerical control spring machine;
a servo motor module disposed on the base;
a tool holding member provided with left and right portions for holding a tool; the cutter clamping component is divided into a left clamp and a right clamp, a first pressure detection device is arranged on the left clamp, and a second pressure detection device is arranged on the right clamp;
the sliding table is arranged on the base, the cutter clamping component can be fixed on the sliding table, and a pressure sensor is arranged in the sliding table;
a first output shaft disposed above the tool holding member and connectable to the servo motor module and the tool holding member, respectively,
the second output shaft is arranged on the sliding table and can be connected with the servo motor module;
the electromagnetic module is divided into an upper part and a lower part, the upper part is arranged on the cutter clamping part, and the lower part is arranged on the sliding table;
the control system is respectively connected with the servo motor module, the first pressure detection device, the second pressure detection device, the pressure sensor and the electromagnetic module and is used for adjusting the working states of all the components;
the cam-free tool rest has two working modes, namely a tool clamping mode and a spring machining mode, in the tool clamping mode, the servo motor module controls the tool clamping part to clamp the tool, automatically judges whether the position of the tool is proper or not according to the pressure value obtained by each pressure detection device, adjusts the rotating speed of the servo motor module according to the pressure value detected by the pressure detection device in the clamping process, and automatically judges whether the clamping is completed or not; in the spring processing mode, the pressure sensor records the pressure value received by the sliding table in the processing process and generates a pressure curve, and the control system adjusts the working mode of the servo motor module according to the pressure curve and the production quality of the spring.
Further, two groups of working modes are arranged in the servo motor module, one is a cutter clamping mode, the other is a spring processing mode,
under the cutter clamping mode, first output shaft with cutter clamping part is connected, servo motor module is connected with first output shaft, will treat the cutter of centre gripping and place in cutter clamping part, servo motor module rotates and drives left centre gripping with right centre gripping moves in opposite directions, first pressure detection device detects the atress condition of left centre gripping, second pressure detection device detects the atress condition of right centre gripping, control system calculates the atress ratio according to the atress condition of left centre gripping and the atress condition of right centre gripping, if the atress ratio is greater than the stress difference big between left centre gripping and the right centre gripping of pressure ratio evaluation value control system judgement of predetermineeing, the cutter is in cutter clamping part internal position is not right, takes place the skew, servo motor module reverses, adjusts the cutter position.
Further, the value of the pressure ratio value evaluation value is determined according to a larger value of the pressure values detected by the first pressure detecting means and the pressure values detected by the second pressure detecting means, and the larger the value of the pressure value used for determination is, the smaller the value of the pressure ratio value evaluation value is.
Further, a clamping and fastening evaluation value is arranged in the control system, and if the average value of the pressure value detected by the first pressure detection device and the pressure value detected by the second pressure detection device is larger than the clamping and fastening evaluation value, the clamping is judged to be completed;
after the cutter clamping component finishes clamping the cutter, the servo motor module is disconnected with the first output shaft, the first output shaft is disconnected with the cutter clamping component, the electromagnetic module is electrified, and the cutter clamping component is fixed with the sliding table through magnetic force.
Further, in the tool clamping mode, the rotational speed of the servo motor module is related to the average value of the pressure values detected by the first pressure detecting device and the second pressure detecting device, and the larger the average value of the pressure values is, the smaller the rotational speed of the servo motor module is.
Further, a pressure sensor is arranged in the sliding table, the servo motor module is connected with the second output shaft in a spring machining mode, and the control system obtains the space position information and the moving speed of the sliding table and adjusts the rotating speed of the servo motor module through the moving speed and the space position information.
Further, the servo motor module drives the sliding table to move according to an internal program, the control system obtains the actual moving speed of the sliding table and compares the actual moving speed with the preset moving speed, whether the speed adjustment is needed or not is judged, if the actual moving speed is larger than the preset moving speed, the servo motor module is subjected to speed reduction adjustment, and if the actual moving speed is smaller than the preset moving speed, the servo motor module is subjected to speed acceleration adjustment;
for the space position of the sliding table, a position judging matrix group is arranged in the control system, a plurality of position judging matrixes are arranged in the position judging matrix group, for any position judging matrix, the position judging matrix comprises preset position information and time node information corresponding to the position information, the control system compares the obtained actual position information of a certain time node in the position judging matrix group with the corresponding preset position information, and the rotating speed of the servo motor module is adjusted according to the comparison result.
Further, after the cutter is contacted with the processed metal wire, the pressure sensor detects the pressure born by the sliding table in real time, gathers the processed data to generate a pressure change curve, and the control system acquires the production condition of the spring moving on the sliding table corresponding to the process and judges whether the advancing of the sliding table needs to be regulated according to the production condition.
Further, if the produced workpiece has no problem and defect, recording the pressure change curves, after continuously recording the pressure change curves of the N produced workpieces which have no problem and defect, analyzing each pressure change curve to determine a standard pressure change curve, and in the subsequent production process, judging whether the current process has faults or not by comparing the actual pressure change value with the corresponding position of the preset standard pressure change curve.
If the produced workpiece has a problem defect, judging the problem defect, searching a point corresponding to the problem defect on a pressure change curve, recording the point, focusing on the point in later processing, and accurately regulating and controlling the pressure born by the sliding table when the point is near.
The invention also provides a cam-free numerical control spring machine, which is provided with the cam-free tool rest for the numerical control spring machine, comprising,
the support device comprises a base and a support frame, wherein the base is arranged below the support frame and is used for fixedly supporting the support frame;
the wire outlet device comprises a wire conveying machine, a motor and a wire outlet end, wherein the motor is connected with the wire conveying machine and used for enabling the wire conveying machine to move so as to drive the conveying of the steel wires, the wire outlet end is connected with the conveyor, and is arranged at the middle position on the supporting frame and penetrates through the supporting frame and used for conveying the steel wires conveyed by the conveyor to the outside of the supporting device through the wire outlet end and adjusting the wire outlet length of the steel wires;
the wire adjusting device comprises a plurality of cam-free knife rests and cam-free knife rest controllers which are equidistantly arranged on the shell of the supporting frame;
the monitoring device is arranged on the shell of the supporting frame and positioned above the cam-free tool rests, and is used for monitoring the working state of the cam-free tool rests, and comprises the steps of acquiring the space position information and the moving speed of the sliding table;
and the central control system is connected with the wire outlet device, the wire adjusting device and the monitoring device respectively and used for adjusting and controlling the working states of all the components.
Compared with the prior art, the automatic tool changing device has the beneficial effects that the tool clamping part is connected with the servo motor module, the purpose of automatically clamping the tool rest is achieved, the rotating speed of the servo motor module is regulated in real time through pressure detection in the tool rest clamping process, the tool clamping part can smoothly and accurately clamp the tool, and meanwhile, the tool clamping part and the sliding table are fixed through the electromagnetic device.
In particular, by arranging two output shafts, a single servo motor module can realize two-step control, reduced motor control, program disorder during processing is prevented, and meanwhile, the structure is compact.
Further, the pressure values detected by the first pressure detecting device and the second pressure detecting device are detected in real time in the process of clamping the cutter, comparison is carried out, when the difference between the two pressure values is large, the deviation of the cutter in the cutter clamping component is described, the servo motor module is rotated at the moment, the position of the cutter is readjusted, the damage to the cutter in the automatic cutter clamping process is prevented, meanwhile, whether the cutter is clamped is accurately determined by internally setting the standard pressure value, and the phenomenon of inaccuracy judged by experience during manual clamping is prevented, so that the cutter is automatically clamped, quickly and accurately.
Further, in the process of clamping the tool, the tool is in a loose state in the tool clamping part at the beginning, along with the possible occurrence of swinging of the clamping, a larger pressure ratio evaluation value is set at the moment, along with the gradual reduction of the inner space of the tool clamping part, the tool is gradually attached to the left clamping and the right clamping, at the moment, if the tool is in a normal state, the pressures detected from left to right are the same or extremely similar, and in the process of gradually reducing the inner space of the tool clamping part, the pressure value detected by the first pressure detection device and the pressure value detected by the second pressure detection device are gradually increased, so that the larger the detected pressure value is, the smaller the pressure ratio evaluation value is, the accuracy of judging whether the position of the tool is proper is ensured, and meanwhile, in the process of clamping the tool, if the tool is offset, the data of one side of the pressure detection is possibly inaccurate, and therefore, the larger value of the two detection values is selected as the standard of detection evaluation, and whether the position of the tool is proper is further accurately judged.
Further, in the process of cutter clamping, the rotating speed of the servo motor module is regulated in real time through pressure detection, so that the cutter clamping component can smoothly and accurately clamp the cutter, and the motor is prevented from being damaged by the motor or the cutter due to constant-speed running.
Furthermore, the invention fixes the cutter clamping part and the sliding table by magnetic force, and the fixing mode is simple and direct, thereby preventing inaccurate judgment by experience during manual clamping, and ensuring automatic clamping, rapidness and accuracy of the cutter. The spatial position of the sliding table is detected in real time, the rotating speed of the servo motor module is regulated, and the machining accuracy is guaranteed.
Further, the rationality of the production process is judged by detecting the pressure received by the sliding table during working of the cutter and comparing with the detected workpiece quality, meanwhile, for a product with a problem, the pressure received by the sliding table processed next time is adjusted through the problem point position of the pressure curve, the processing error can be automatically eliminated through iteration, the manual calibration time is reduced, and the production speed is further accelerated.
Drawings
FIG. 1 is a schematic top view of a cam-less tool holder for a numerical control spring machine in an embodiment;
fig. 2 is a schematic diagram of a front view structure of a cam-free tool rest for a numerical control spring machine in an embodiment;
fig. 3 is a schematic diagram of a right-hand view structure of a cam-free tool rest for a numerical control spring machine in an embodiment;
fig. 4 is a schematic structural diagram of a numerical control spring machine without a cam in the embodiment.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1-3, fig. 1 is a schematic top view of a cam-free tool rest for a numerical control spring machine according to an embodiment; fig. 2 is a schematic diagram of a front view structure of a cam-free tool rest for a numerical control spring machine in an embodiment; fig. 3 is a schematic right-view structural diagram of a cam-free knife rest for a numerical control spring machine in an embodiment.
The invention discloses a cam-free tool rest for a numerical control spring machine, which comprises,
a base 21 provided on the numerical control spring machine;
a servo motor module 22 provided on the base 21;
a tool holding member 23 provided with left and right portions for holding a tool; the cutter clamping member 23 is divided into a left clamp 231 and a right clamp 232, a first pressure detection device is arranged on the left clamp 231, and a second pressure detection device is arranged on the right clamp 232; the tool holding member 23 is provided with an insulating layer at the contact surface with the tool.
A slide table 24 provided on the base 21, the tool holding member 23 being fixable to the slide table 24, a pressure sensor being provided in the slide table 24;
a first output shaft 25, which is arranged above the tool holding part 23 and can be connected to the servo motor module 22 and the tool holding part 23 respectively,
a second output shaft 26 provided on the slide table 24 and connectable to the servo motor module 22;
an electromagnetic module which is divided into an upper part and a lower part, wherein the upper part is arranged on the cutter clamping part 23, and the lower part is arranged on the sliding table 24;
the control system is respectively connected with the servo motor module 22, the first pressure detection device, the second pressure detection device, the pressure sensor and the electromagnetic module and is used for adjusting the working states of all the components;
the cam-free tool rest has two working modes, namely a tool clamping mode and a spring machining mode, in the tool clamping mode, the servo motor module 22 controls the tool clamping part 23 to clamp the tool, automatically judges whether the position of the tool is proper according to the pressure value obtained by each pressure detection device, adjusts the rotating speed of the servo motor module 22 according to the pressure value detected by the pressure detection device in the clamping process, and automatically judges whether the clamping is completed; in the spring processing mode, the pressure sensor records the pressure value received by the sliding table 24 in the processing process, generates a pressure curve, and the control system adjusts the working mode of the servo motor module 22 according to the pressure curve and the production quality of the spring.
According to the invention, the cutter clamping part 23 is connected with the servo motor module 22, so that the purpose of automatically clamping the cutter holder is achieved, the rotating speed of the servo motor module 22 is regulated in real time through pressure detection in the cutter holder clamping process, the cutter clamping part 23 can smoothly and accurately clamp the cutter, and meanwhile, the cutter clamping part 23 and the sliding table 24 are fixed through the electromagnetic device.
By providing two output shafts, a single servo motor module 22 can achieve two-step control, reduced motor control, prevention of program disorder during processing, and compact structure.
Specifically, in the tool clamping mode, the first output shaft 25 is connected with the tool clamping member 23, the servo motor module 22 is connected with the first output shaft 25, a tool to be clamped is placed in the tool clamping member 23, the servo motor module 22 rotates to drive the left clamp 231 and the right clamp 232 to move in opposite directions, the first pressure detecting device detects the stress condition of the left clamp 231, the second pressure detecting device detects the stress condition of the right clamp 232, wherein the pressure value detected by the first pressure detecting device is A1, the pressure value detected by the second pressure detecting device is A2, the control system compares the pressure value A1 with the pressure value A2,
the control system calculates the ratio Ba of A1 to A2, ba=A1/A2, the control system is internally provided with a pressure ratio evaluation value Bz,
if Ba > Bz, the control system judges that the stress difference between the left clamp 231 and the right clamp 232 is large, the position of the cutter in the cutter clamping part 23 is not correct, the cutter is deviated, the servo motor module 22 is reversed, the cutter is in a loose state, and an operator adjusts the position of the cutter;
if Ba is less than or equal to Bz, the control system determines that the position of the cutter in the cutter clamping part 23 is correct, and the servo motor module 22 continues to control the left clamp 231 and the right clamp 232 to move oppositely until the clamping is completed.
The pressure values detected by the first pressure detecting device and the second pressure detecting device are detected in real time in the process of clamping the cutter, comparison is carried out, when the difference between the two pressure values is large, the deviation of the cutter in the cutter clamping part 23 is described, the servo motor module 22 is rotated at the moment, the position of the cutter is readjusted, the damage to the cutter in the automatic cutter clamping process is prevented, meanwhile, whether the cutter is clamped can be accurately determined by internally setting the standard pressure value, the inaccurate phenomenon judged by experience during manual clamping is prevented, and the cutter is automatically clamped, rapidly and accurately.
Specifically, the value of the pressure ratio value Bz is determined based on a larger value of the pressure value detected by the first pressure detecting means and the pressure value detected by the second pressure detecting means, and the larger the value of the pressure value used for determination is, the smaller the value of the pressure ratio value is.
The control system selects a larger value Ai, ai=a1 or A2, bz=B0/ai+b from the pressure value detected by the first pressure detection device and the pressure value detected by the second pressure detection device, wherein B0 is a pressure ratio evaluation value judgment value, and B is a pressure ratio evaluation value basic value.
In the process of clamping the tool, the tool is in a loose state in the tool clamping part 23 at the beginning, along with the possible occurrence of swinging of the clamping, a larger pressure ratio evaluation value is set at the moment, along with the gradual reduction of the inner space of the tool clamping part 23, the tool is gradually attached to the left clamping 231 and the right clamping 232, at the moment, if the tool is in a normal state, the pressures detected from left to right are the same or extremely similar, in the process of gradually reducing the inner space of the tool clamping part 23, the pressure value detected by the first pressure detection device and the pressure value detected by the second pressure detection device are gradually increased, so that the larger the detected pressure value is, the smaller the pressure ratio evaluation value is, thereby ensuring the accuracy of judging whether the position of the tool is proper or not.
Specifically, the control system is provided with a clamping and tightening evaluation value Az, and if the average value of the pressure value detected by the first pressure detection device and the pressure value detected by the second pressure detection device is greater than the clamping and tightening evaluation value, it is determined that clamping is completed.
When (A1+A2)/(2) is not less than Az, the completion of clamping the tool is judged.
In the tool clamping mode, the rotational speed of the servo motor module 22 is related to the average value of the pressure values detected by the first pressure detecting means and the second pressure detecting means, and the larger the average value of the pressure values is, the smaller the rotational speed of the servo motor module 22 is.
In the process of clamping the cutter, the rotating speed of the servo motor module 22 is regulated in real time through pressure detection, so that the cutter clamping part 23 can smoothly and accurately clamp the cutter, and the motor is prevented from being damaged by the motor or the cutter due to constant-speed running.
Specifically, after the tool clamping member 23 completes clamping the tool, the servo motor module 22 is disconnected from the first output shaft 25, the first output shaft 25 is disconnected from the tool clamping member 23, the electromagnetic module is energized, and the tool clamping member 23 is fixed to the slide table 24 by magnetic force.
The invention fixes the cutter clamping part 23 and the sliding table 24 by magnetic force, and the fixing mode is simple and direct, thus preventing inaccurate judgment by experience during manual clamping, and leading the cutter to be automatically clamped, fast and accurate.
Specifically, in the spring processing mode, the servo motor module 22 is connected to the second output shaft 26, and the control system obtains the spatial position information and the moving speed of the sliding table 24, and adjusts the rotation speed of the servo motor module 22 according to the moving speed and the spatial position information.
Specifically, the servo motor module 22 drives the sliding table 24 to move according to an internal program, the control system obtains the actual moving speed of the sliding table 24 and compares the actual moving speed with a preset moving speed, determines whether the speed adjustment is required, performs the deceleration adjustment on the servo motor module 22 if the actual moving speed is greater than the preset moving speed, and performs the acceleration adjustment on the servo motor module 22 if the actual moving speed is less than the preset moving speed;
for the spatial position of the sliding table 24, a position judging matrix set is provided in the control system, a plurality of position judging matrices are provided in the position judging matrix set, for any position judging matrix, the position judging matrix set comprises preset position information and time node information corresponding to the position information, the control system compares the obtained actual position information of a certain time node in the position judging matrix set with the corresponding preset position information, and the rotating speed of the servo motor module 22 is adjusted according to the comparison result.
The accuracy of processing is ensured by detecting the space position of the sliding table 24 in real time and adjusting the rotating speed of the servo motor module 22.
Specifically, after the cutter contacts with the processed wire, the pressure sensor detects the pressure born by the sliding table 24 in real time, gathers the processed data to generate a pressure change curve, and the control system acquires the production condition of the spring moving in the sliding table 24 corresponding to the process, and judges whether the travel of the sliding table 24 needs to be regulated according to the production condition.
Specifically, if the produced workpiece has no problem and defect, the pressure change curves are recorded, after the pressure change curves of the N produced workpieces which have no problem and defect are continuously recorded, the pressure change curves are analyzed to determine the standard pressure change curve, and in the subsequent production process, the actual pressure change value is compared with the corresponding position of the preset standard pressure change curve to determine whether the current process has faults or not.
If the produced workpiece has a problem defect, judging the problem defect, searching a point corresponding to the problem defect on a pressure change curve, recording the point, focusing on the point in later processing, and accurately regulating and controlling the pressure born by the sliding table 24 when the focus is nearby.
Specifically, the problem defect includes that the inner diameter exceeds the difference, specifically, when the bending procedure is processed, the actual bending inner diameter is inconsistent with the preset bending inner diameter, if the actual inner diameter is smaller than the preset bending inner diameter, the cutter is judged to move too much, the cutter is reduced to move when the next processing is performed, the control system obtains the pressure change curve of the bending area, and the reasonable pressure change curve is reversely pushed through the difference value of the unqualified inner diameter, and the processing is performed according to the reversely pushed pressure change curve in the subsequent processing process, and the standard pressure change curve is obtained through the stack feedback.
The rationality of the production process is judged by detecting the pressure received by the sliding table 24 during working of the cutter and comparing with the detected workpiece quality, meanwhile, for a product with problems, the pressure received by the sliding table 24 processed next time is adjusted through the problem point position of the pressure curve, the processing error can be automatically eliminated through iteration, the manual calibration time is shortened, and the production speed is further accelerated.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a numerical control spring machine without cams in an embodiment.
The invention also provides a cam-free numerical control spring machine, which is provided with the cam-free tool rest for the numerical control spring machine, comprising,
the support device 1 comprises a support base and a support frame, wherein the support base is arranged below the support frame and is used for fixedly supporting the support frame;
the wire outlet device comprises a wire conveying machine, a motor and a wire outlet end, wherein the motor is connected with the wire conveying machine and used for enabling the wire conveying machine to move so as to drive the conveying of the steel wires, the wire outlet end is connected with the conveyor, and is arranged at the middle position on the supporting frame and penetrates through the supporting frame and used for conveying the steel wires conveyed by the conveyor to the outside of the supporting device through the wire outlet end and adjusting the wire outlet length of the steel wires;
the wire adjusting device comprises a plurality of cam-free tool rests 2 and cam-free tool rest controllers which are equidistantly arranged on the shell of the supporting frame;
the monitoring device 3 is arranged on the shell of the supporting frame and above the cam-free tool rests, and is used for monitoring the working state of the cam-free tool rests, and comprises the steps of acquiring the space position information and the moving speed of the sliding table 24;
and the central control system 4 is connected with the wire outlet device, the wire adjusting device and the monitoring device respectively and is used for adjusting and controlling the working states of all the components.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
Claims (10)
1. A cam-free tool rest for a numerical control spring machine is characterized by comprising,
the base is arranged on the numerical control spring machine;
a servo motor module disposed on the base;
a tool holding member provided with left and right portions for holding a tool; the cutter clamping component is divided into a left clamp and a right clamp, a first pressure detection device is arranged on the left clamp, and a second pressure detection device is arranged on the right clamp;
the sliding table is arranged on the base, the cutter clamping component can be fixed on the sliding table, and a pressure sensor is arranged in the sliding table;
a first output shaft disposed above the tool holding member and connectable to the servo motor module and the tool holding member, respectively,
the second output shaft is arranged on the sliding table and can be connected with the servo motor module;
the electromagnetic module is divided into an upper part and a lower part, the upper part is arranged on the cutter clamping part, and the lower part is arranged on the sliding table;
the control system is respectively connected with the servo motor module, the first pressure detection device, the second pressure detection device, the pressure sensor and the electromagnetic module and is used for adjusting the working states of all the components;
the cam-free tool rest has two working modes, namely a tool clamping mode and a spring machining mode, in the tool clamping mode, the servo motor module controls the tool clamping part to clamp the tool, automatically judges whether the position of the tool is proper or not according to the pressure value obtained by each pressure detection device, adjusts the rotating speed of the servo motor module according to the pressure value detected by the pressure detection device in the clamping process, and automatically judges whether the clamping is completed or not; in a spring processing mode, the pressure sensor records a pressure value received by the sliding table in the processing process and generates a pressure curve, and the control system adjusts the working mode of the servo motor module according to the pressure curve and the production quality of the spring;
in the cutter clamping mode, the first output shaft is connected with the cutter clamping component, the servo motor module is connected with the first output shaft, a cutter to be clamped is placed in the cutter clamping component, the servo motor module rotates to drive the left clamp and the right clamp to move oppositely, the first pressure detection device detects the stress condition of the left clamp, the second pressure detection device detects the stress condition of the right clamp, wherein the pressure value detected by the first pressure detection device is A1, the pressure value detected by the second pressure detection device is A2, the control system compares the pressure value A1 with the pressure value A2,
the control system calculates the ratio Ba of A1 to A2, ba=A1/A2, the control system is internally provided with a pressure ratio evaluation value Bz,
if Ba is greater than Bz, the control system judges that the stress difference between the left clamping and the right clamping is large, the position of the cutter in the cutter clamping part is not correct, the cutter is deviated, the servo motor module reverses, the cutter is in a loose state, and an operator adjusts the position of the cutter;
if Ba is less than or equal to Bz, the control system judges that the position of the cutter in the cutter clamping component is correct, and the servo motor module continuously controls the left clamping and the right clamping to move in opposite directions until the clamping is completed;
and detecting the pressure values detected by the first pressure detecting device and the second pressure detecting device in real time in the process of clamping the cutter, comparing the pressure values, and rotating the servo motor module to readjust the position of the cutter when the difference between the two pressure values is large.
2. The cam-free knife rest for numerical control spring machine according to claim 1, wherein two groups of working modes are arranged in the servo motor module, one is a knife clamping mode, the other is a spring machining mode,
under the cutter clamping mode, first output shaft with cutter clamping part is connected, servo motor module is connected with first output shaft, will treat the cutter of centre gripping and place in cutter clamping part, servo motor module rotates and drives left centre gripping with right centre gripping moves in opposite directions, first pressure detection device detects the atress condition of left centre gripping, second pressure detection device detects the atress condition of right centre gripping, control system calculates the atress ratio according to the atress condition of left centre gripping and the atress condition of right centre gripping, if the atress ratio is greater than the stress difference big between left centre gripping and the right centre gripping of pressure ratio evaluation value control system judgement of predetermineeing, the cutter is in cutter clamping part internal position is not right, takes place the skew, servo motor module reverses, adjusts the cutter position.
3. The cam-less tool rest for a digitally controlled spring machine according to claim 2, wherein the value of the pressure ratio value evaluation value is determined based on a larger value of the pressure values detected by the first pressure detecting means and the pressure values detected by the second pressure detecting means, and the larger the value of the pressure value used for determination is, the smaller the value of the pressure ratio value evaluation value is.
4. The cam-less tool rest for a numerical control spring machine according to claim 3, wherein a clamping tightening evaluation value is provided in the control system, and if an average value of the pressure values detected by the first pressure detection device and the pressure values detected by the second pressure detection device is greater than the clamping tightening evaluation value, it is determined that clamping is completed;
after the cutter clamping component finishes clamping the cutter, the servo motor module is disconnected with the first output shaft, the first output shaft is disconnected with the cutter clamping component, the electromagnetic module is electrified, and the cutter clamping component is fixed with the sliding table through magnetic force.
5. The cam-less tool holder for a digitally controlled spring machine of claim 4, wherein in the tool clamping mode, the rotational speed of the servo motor module is related to an average of the pressure values detected by the first pressure detecting means and the pressure values detected by the second pressure detecting means, and the greater the average of the pressure values, the less the rotational speed of the servo motor module.
6. The cam-free tool rest for the numerical control spring machine according to claim 2, wherein a pressure sensor is arranged in the sliding table, the servo motor module is connected with the second output shaft in a spring machining mode, and the control system acquires the space position information and the moving speed of the sliding table and adjusts the rotating speed of the servo motor module according to the moving speed and the space position information.
7. The cam-free tool rest for the numerical control spring machine according to claim 6, wherein the servo motor module drives the sliding table to move according to an internal program, the control system obtains the actual moving speed of the sliding table and compares the actual moving speed with a preset moving speed to judge whether the speed adjustment is needed, the servo motor module is subjected to speed reduction adjustment if the actual moving speed is larger than the preset moving speed, and the servo motor module is subjected to acceleration adjustment if the actual moving speed is smaller than the preset moving speed;
for the space position of the sliding table, a position judging matrix group is arranged in the control system, a plurality of position judging matrixes are arranged in the position judging matrix group, for any position judging matrix, the position judging matrix comprises preset position information and time node information corresponding to the position information, the control system compares the obtained actual position information of a certain time node in the position judging matrix group with the corresponding preset position information, and the rotating speed of the servo motor module is adjusted according to the comparison result.
8. The cam-free tool rest for the numerical control spring machine according to claim 7, wherein after the cutter is contacted with the processed metal wire, the pressure sensor detects the pressure born by the sliding table in real time, gathers the processed data to generate a pressure change curve, and the control system acquires the production condition of the spring in the corresponding process of moving the sliding table, and judges whether the advancing of the sliding table needs to be regulated according to the production condition.
9. The cam-free tool rest for the numerical control spring machine according to claim 8, wherein if the produced workpiece has no problem defect, the pressure change curves are recorded, after the pressure change curves of the N produced workpieces having no problem defect are continuously recorded, the pressure change curves are analyzed to determine a standard pressure change curve, and in the subsequent production process, whether the current process has faults is determined by comparing the actual pressure change value with the corresponding position of the preset standard pressure change curve;
if the produced workpiece has a problem defect, judging the problem defect, searching a point corresponding to the problem defect on a pressure change curve, recording the point, focusing on the point in later processing, and accurately regulating and controlling the pressure born by the sliding table when the point is near.
10. A cam-free numerical control spring machine, on which the cam-free tool rest for the numerical control spring machine according to any one of claims 1-9 is arranged, is characterized by comprising,
the support device comprises a base and a support frame, wherein the base is arranged below the support frame and is used for fixedly supporting the support frame;
the wire outlet device comprises a wire conveying machine, a motor and a wire outlet end, wherein the motor is connected with the wire conveying machine and used for enabling the wire conveying machine to move so as to drive the wire to be conveyed, the wire outlet end is connected with the wire conveying machine, and is arranged at the middle position on the supporting frame and penetrates through the supporting frame and used for conveying the wire conveyed by the wire conveying machine to the outside of the supporting device through the wire outlet end and adjusting the wire outlet length of the wire;
the wire adjusting device comprises a plurality of cam-free knife rests and cam-free knife rest controllers which are equidistantly arranged on the shell of the supporting frame;
the monitoring device is arranged on the shell of the supporting frame and positioned above the cam-free tool rests, and is used for monitoring the working state of the cam-free tool rests, and comprises the steps of acquiring the space position information and the moving speed of the sliding table;
and the central control system is connected with the wire outlet device, the wire adjusting device and the monitoring device respectively and used for adjusting and controlling the working states of all the components.
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| CN202310730058.0A CN116652068B (en) | 2023-06-20 | 2023-06-20 | Cam-free tool rest for numerical control spring machine |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1171309A (en) * | 1996-07-17 | 1998-01-28 | Mec机械株式会社 | Method and apparatus for linear spring |
| US5732583A (en) * | 1994-12-22 | 1998-03-31 | Kabushiki Kaisha Itaya Seisaku Sho | Wire forming apparatus |
| CN102806286A (en) * | 2012-08-27 | 2012-12-05 | 嵊州市创宇机械科技有限公司 | Separated knife rest of spring machine |
| CN210254036U (en) * | 2019-03-06 | 2020-04-07 | 嵊州市人和弹簧机械有限公司 | Clamping device of spring core cutter |
| CN212682316U (en) * | 2020-04-10 | 2021-03-12 | 中机生产力促进中心 | Automatic cutter replacing device and multi-station spring machine |
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2023
- 2023-06-20 CN CN202310730058.0A patent/CN116652068B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5732583A (en) * | 1994-12-22 | 1998-03-31 | Kabushiki Kaisha Itaya Seisaku Sho | Wire forming apparatus |
| CN1171309A (en) * | 1996-07-17 | 1998-01-28 | Mec机械株式会社 | Method and apparatus for linear spring |
| CN102806286A (en) * | 2012-08-27 | 2012-12-05 | 嵊州市创宇机械科技有限公司 | Separated knife rest of spring machine |
| CN210254036U (en) * | 2019-03-06 | 2020-04-07 | 嵊州市人和弹簧机械有限公司 | Clamping device of spring core cutter |
| CN212682316U (en) * | 2020-04-10 | 2021-03-12 | 中机生产力促进中心 | Automatic cutter replacing device and multi-station spring machine |
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| Publication number | Publication date |
|---|---|
| CN116652068A (en) | 2023-08-29 |
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