CN117381336B - Process and system for motor seat and down tube integrated structure by oil/water injection molding - Google Patents
Process and system for motor seat and down tube integrated structure by oil/water injection molding Download PDFInfo
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- CN117381336B CN117381336B CN202311606377.7A CN202311606377A CN117381336B CN 117381336 B CN117381336 B CN 117381336B CN 202311606377 A CN202311606377 A CN 202311606377A CN 117381336 B CN117381336 B CN 117381336B
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 70
- 238000001816 cooling Methods 0.000 claims abstract description 51
- 238000012545 processing Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000005452 bending Methods 0.000 claims abstract description 10
- 238000007493 shaping process Methods 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims description 79
- 239000007924 injection Substances 0.000 claims description 79
- 238000006073 displacement reaction Methods 0.000 claims description 54
- 238000007789 sealing Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims description 2
- 238000005187 foaming Methods 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011796 hollow space material Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a process for adopting an oil/water injection molding motor seat and lower pipe integrated structure, which comprises the following steps: pushing the metal blank into a die through a hydraulic injection molding system; then cooling the die to solidify the metal blank in the die; after cooling and solidifying the metal pipe material in the mould, opening the mould and taking out the prepared metal pipe fitting; heat treating the metal pipe fitting; bending the metal pipe fitting through a bending machine; carrying out hydraulic shaping on the bent metal pipe fitting through a hydraulic shaping system to obtain an integrated to-be-machined part; the integrated workpiece to be processed is processed through the CNC processing center, the motor seat and lower pipe integrated structure is obtained, hydraulic injection molding is adopted, the density is high, compared with a gravity casting process, the foaming condition in the baking finish process is avoided, and meanwhile, the problem that materials are loose and hollow or loose and cracked in the subsequent processing process is avoided.
Description
Technical Field
The invention relates to the technical field of electric bicycle parts, in particular to a process and a system for adopting an oil/water injection molding motor seat and lower pipe integrated structure.
Background
The lower tube and the motor seat are two important parts of the electric bicycle, and in order to improve the production quality of the lower tube and the motor seat, the existing motor seat and lower tube integrated mechanism is usually formed by combining the motor seat and the lower tube in a welding way, so that the machining efficiency is low, the cost is high, and the appearance quality is poor;
The invention patent with the publication number of CN114987671A discloses an integrated lower tube motor seat of an electric bicycle, which comprises a lower tube body, wherein a middle tube connecting part is formed on the upper part of the lower tube body and used for connecting a middle tube, a battery mounting part is arranged on the outer side of the lower tube body and used for mounting a battery on the outer side of the lower tube body, a seat body is formed on the bottom of the lower tube body, a mounting cavity with a downward opening is formed in the seat body and used for mounting a motor, a threading hole is formed on the surface of the seat body in a penetrating mode, and the threading hole is communicated with the mounting cavity. The beneficial effects are that the middle pipe connecting part, the lower pipe body and the seat body are integrally formed, and the process is simplified;
However, the scheme is manufactured by adopting a recasting process, has loose internal density, rough appearance and large deformation, causes foaming of baking varnish of the frame and cracking of the frame, has difficult quality requirements, and has potential safety hazard in the use process.
Disclosure of Invention
The present invention is directed to a process and system for providing an integrated motor seat and down tube structure using oil/water injection molding to solve the above-mentioned problems.
The aim of the invention can be achieved by the following technical scheme:
The process of adopting the motor seat and lower pipe integrated structure of oil/water injection molding comprises the following steps:
step one: pushing the metal pipe material into a die through a hydraulic injection molding system; then cooling the die to solidify the metal blank in the die; comprising the following steps:
S1: acquiring injection pressure of an injection screw and initial air pressure in a die cavity in an injection molding process through a data acquisition module; in the injection molding process, based on the displacement value of an injection molding screw, a pressure relief value in a mold cavity is obtained in a server through a data processing module, then a pressure relief valve is controlled through an adjusting module to relieve pressure, and the air pressure in the mold cavity is obtained after the pressure relief and is compared with the initial air pressure;
S2: after the injection molding of the metal blank is completed, under the condition that the pressure is unchanged in the cooling process acquired by the data acquisition module, the injection molding pressure of the injection molding screw rod is changed in the process of changing the temperature of the pipe material, and meanwhile, the displacement value of the injection molding screw rod is acquired;
S3: based on the data value obtained by the data acquisition module, obtaining the injection pressure change rate required by adjusting the injection screw and the displacement change rate of the injection screw in the pressure keeping process by the data processing module; and sends the result to the judging module;
S4: the judgment feedback module acquires a preset value from the server, compares the injection pressure change rate and the displacement change rate with the preset values respectively, judges the cooling state of the mold, and feeds back the cooling state to the display control end;
Step two: after cooling and solidifying the metal pipe material in the mould, opening the mould and taking out the prepared metal pipe fitting;
Step three: heat treating the metal pipe fitting; bending the metal pipe fitting through a bending machine;
Step four: carrying out hydraulic shaping on the bent metal pipe fitting through a hydraulic shaping system to obtain an integrated to-be-machined part;
step five: and processing the integrated workpiece to be processed through a CNC processing center to obtain the motor seat and lower pipe integrated structure.
As a further scheme of the invention: in the step S1, the displacement value of the injection screw is obtained by a distance sensor and marked as W y, the injection pressure is obtained by a pressure sensor in the hydraulic system and marked as Y y, the initial air pressure in the mold cavity is obtained by a pressure sensor at the end of the injection screw and marked as Q c, and the air pressure after decompression is Q h.
As a further scheme of the invention: in the step S1:
If Q h＜Qc; the injection mold is not completely sealed;
If Q h＞Qc; the injection pressure of the injection screw is too high;
If Q h＝Qc; the injection works normally.
As a further scheme of the invention: in the step S2:
After the metal blank is completely injection molded, taking the temperature at which the end part of the injection molding screw contacts with the metal pipe in the mold as an initial pipe temperature T 0; simultaneously obtaining the pressure between the end part of the injection molding screw and the metal pipe material at the initial temperature T 0, namely the holding pressure L 0; meanwhile, a displacement point W 0 of the forward movement of the injection screw at the initial temperature T 0 is obtained, unit temperature variation c is taken as an interval temperature section, the holding pressure is kept unchanged by L 0, and the temperature point of each temperature section is marked as T i; the injection pressure at this temperature point is labeled Y i and the displacement point is labeled W i.
As a further scheme of the invention: the step S3 includes:
Step S31: acquiring injection pressure Y i and a displacement value W i of an injection screw at a temperature point T i when the injection screw keeps the pressure in a die to be L 0;
Step S32: by passing through Acquiring the change rate alpha of the injection pressure Y i at the moment of a temperature point T i;
Step S33: by passing through The change rate β of the displacement value W i at the time point T i is obtained.
As a further scheme of the invention: in the step S4:
The preset values include a preset injection pressure change rate α s and a preset displacement change rate β s.
As a further scheme of the invention: in the step S4:
if the displacement change rate beta is less than 0; the cooled metal blank in the mold contains a gas;
If the displacement change rate beta is more than 0 and alpha is less than 0; incomplete sealing occurs during the cooling process of the mold;
if the displacement change rate beta is more than 0, alpha is more than 0; judging that the die is cooled and pressure-maintaining; and comparing the moment ratio of the injection molding pressure to the displacement value with a preset moment ratio.
As a further scheme of the invention: by passing throughAcquiring a moment ratio gamma at a temperature point T i; meanwhile, a preset moment ratio gamma s is obtained;
Comparing the moment ratio gamma with a preset moment ratio gamma s;
when gamma is more than gamma s; indicating the shrinkage rate difference in the cooling forming process of the metal pipe fitting;
When gamma is more than gamma s; the shrinkage rate of the metal pipe fitting in the cooling and forming process is qualified.
As a further scheme of the invention: comprising the following steps:
and a data acquisition module: the method comprises the steps of obtaining an injection molding data value of a mold injection molding process; the method is used for obtaining a cooling data value in the cooling process of the die;
And an adjusting module: for regulating the pressure in the mold cavity of the mold during injection molding;
and a data processing module: for processing the injection data values during injection molding and the cooling data values during cooling;
And a decision feedback module: and the data processing module is used for judging and comparing the data values in the data processing module, generating feedback and sending the feedback to the display control terminal.
The invention has the beneficial effects that:
(1) According to the invention, the metal pipe fitting is injection molded, the pipe fitting is subjected to heat treatment to improve the hardness of the pipe fitting, the pipe fitting is subjected to bending and shaping processing to obtain a to-be-machined part with an integrated structure of the motor seat and the lower pipe, and then the CNC is used for punching and cutting processing to obtain an integrated structure of the motor seat and the lower pipe; meanwhile, the integrated structure design is adopted, so that the cost is low, and secondary welding is not needed; meanwhile, in the injection molding process of the motor seat and lower pipe integrated structure pipe fitting, hydraulic injection molding is adopted, the density is high, compared with a gravity casting process, the foaming condition in the baking finish process is avoided, and meanwhile, the problems of loose and hollow materials or loose and cracked materials in the subsequent processing process are avoided.
(2) According to the invention, the pressure of the metal pipe fitting in the cooling process is maintained, the real-time pressure value of the injection screw to the metal pipe fitting in the mold under the non-injection work is obtained, the injection screw needs to move towards the direction close to the metal pipe fitting in the mold while the pressure in the mold is balanced, and the pressure of the injection screw in the mold is further matched to be kept constant; in the process of cooling the die, the pressure maintaining process of the pressure in the die is monitored to acquire the change of various data in the die, so that the cooling state of the metal pipe fitting and the die in the cooling process is monitored, and the stable operation of various operations in the injection molding and cooling processes is effectively ensured; the requirement of the metal pipe fitting obtained by injection molding as an integral structural member of the motor seat and the lower pipe is ensured.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic illustration of the process flow of the present invention;
FIG. 2 is a block diagram of the system of the present invention;
FIG. 3 is a schematic diagram of the system workflow of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, the present invention is a process for forming a motor seat and down tube integrated structure by oil/water injection, comprising the steps of:
step one: pushing the metal pipe material into a die through a hydraulic injection molding system; then cooling the die to solidify the metal blank in the die;
Step two: after cooling and solidifying the metal pipe material in the mould, opening the mould and taking out the prepared metal pipe fitting;
Step three: heat treating the metal pipe fitting; bending the metal pipe fitting through a bending machine;
Step four: carrying out hydraulic shaping on the bent metal pipe fitting through a hydraulic shaping system to obtain an integrated to-be-machined part;
Step five: processing the integrated workpiece to be processed through a CNC processing center to obtain a motor seat and lower pipe integrated structure;
The metal pipe fitting is subjected to injection molding, then the pipe fitting is subjected to heat treatment to improve the hardness of the metal pipe fitting, and then the pipe fitting is subjected to bending and shaping processing to obtain a to-be-machined part of the motor seat and lower pipe integrated structure, and then the CNC is used for punching and cutting processing to obtain the motor seat and lower pipe integrated structure, so that the whole structure is connected in a welding mode compared with the original structure, on one hand, the attractiveness is improved, the hardness of the structure is ensured, and the safety of a frame is further improved;
Meanwhile, the integrated structural design is adopted, so that the cost is low, and secondary welding is not needed;
meanwhile, in the injection molding process of the motor seat and lower pipe integrated structure pipe fitting, hydraulic injection molding is adopted, the density is high, compared with a gravity casting process, the foaming condition in the baking finish process is avoided, and meanwhile, the problems of loose and hollow materials or loose and cracked materials in the subsequent processing process are avoided.
Example two
Referring to fig. 3, in order to ensure stability and accuracy of the metal tubing during injection molding and cooling;
the application provides a hydraulic injection molding system in the first step, which is used for monitoring a metal blank in an injection molding process so as to ensure that the obtained metal pipe fitting meets higher requirements; specifically, the method comprises the following steps:
S1: acquiring injection pressure of an injection screw and initial air pressure in a die cavity in an injection molding process through a data acquisition module; in the injection molding process, based on the displacement value of an injection molding screw, a pressure relief value in a mold cavity is obtained in a server through a data processing module; the displacement value of the injection molding screw is obtained by a distance sensor and marked as W y, the injection molding pressure is obtained by a pressure sensor in a hydraulic system and marked as Y y, and the initial air pressure in the mold cavity is obtained by a pressure sensor at the end part of the injection molding screw and marked as Q c;
the pressure release valve is controlled by the adjusting module to release pressure, and the air pressure in the die cavity is obtained and compared with the initial air pressure after the pressure release; the air pressure after pressure relief is Q h;
if Q h＜Qc; the injection mold is not completely sealed; the tightness of the injection mold needs to be detected; and ensuring that the tightness of the injection mold is qualified;
if Q h＞Qc; the injection pressure of the injection screw is too high; the pressure of the injection screw in the injection molding process needs to be adjusted so that the injection screw can keep a good injection molding state in the injection molding process, and the stability of the pressure in the mold cavity in the injection molding process is further ensured;
If Q h＝Qc; the injection molding work is normal;
S2: after the injection molding of the metal blank is completed, under the condition that the pressure is unchanged in the cooling process acquired by the data acquisition module, the injection molding pressure of the injection molding screw rod is changed in the process of changing the temperature of the pipe material, and meanwhile, the displacement value of the injection molding screw rod is acquired; after the metal blank is completely injection molded, taking the temperature at which the end part of the injection molding screw contacts with the metal pipe in the mold as an initial pipe temperature T 0; simultaneously obtaining the pressure between the end part of the injection molding screw and the metal pipe material at the initial temperature T 0, namely the holding pressure L 0; meanwhile, a displacement point W 0 of the forward movement of the injection screw at the initial temperature T 0 is obtained, unit temperature variation c is taken as an interval temperature section, the holding pressure is kept unchanged by L 0, and the temperature point of each temperature section is marked as T i; the injection molding pressure at the temperature point is marked as Y i, and the displacement point is marked as W i;
S3: based on the data value obtained by the data acquisition module, obtaining the injection pressure change rate required by adjusting the injection screw and the displacement change rate of the injection screw in the pressure keeping process by the data processing module; and sends the result to the judging module;
Specifically, the method comprises the following step S31: acquiring injection pressure Y i and a displacement value W i of an injection screw at a temperature point T i when the injection screw keeps the pressure in a die to be L 0;
Step S32: by passing through Acquiring the change rate alpha of the injection pressure Y i at the moment of a temperature point T i;
Step S33: by passing through Acquiring the change rate beta of the displacement value W i at the moment of the temperature point T i;
S4: the judgment feedback module acquires a preset value from the server, compares the injection pressure change rate and the displacement change rate with the preset values respectively, judges the cooling state of the mold, and feeds back the cooling state to the display control end; the preset values comprise a preset injection pressure change rate alpha s and a preset displacement change rate beta s.
In particular, the method comprises the steps of,
Step S41: if the displacement change rate beta is less than 0; the cooled metal blank in the mold contains a gas;
If the displacement change rate beta is more than 0 and alpha is less than 0; incomplete sealing occurs during the cooling process of the mold;
If the displacement change rate beta is more than 0, alpha is more than 0; judging that the die is cooled and pressure-maintaining; comparing the moment ratio of the injection molding pressure to the displacement value with a preset moment ratio;
step S42: by passing through Acquiring a moment ratio gamma at a temperature point T i; meanwhile, a preset moment ratio gamma s is obtained;
Comparing the moment ratio gamma with a preset moment ratio gamma s;
when gamma is more than gamma s; indicating the shrinkage rate difference in the cooling forming process of the metal pipe fitting;
When gamma is more than gamma s; the shrinkage rate of the metal pipe fitting in the cooling and forming process is qualified.
The pressure of the injection screw is increased to balance the pressure loss caused by cold shrinkage of the metal pipe in the mold, and meanwhile, the front end of the injection screw is required to keep a certain distance from the metal pipe in the mold, so that the injection screw is required to move towards the direction close to the metal pipe in the mold while balancing the pressure in the mold, and the pressure in the mold is further required to be kept constant by matching with the injection screw;
In the process of cooling the die, the pressure maintaining process of the pressure in the die is monitored to acquire the change of various data in the die, so that the cooling state of the metal pipe fitting and the die in the cooling process is monitored, and the stable operation of various operations in the injection molding and cooling processes is effectively ensured; the requirement of the metal pipe fitting obtained by injection molding as an integral structural member of the motor seat and the lower pipe is ensured;
Example III
Referring to fig. 2, based on the above embodiment, the present embodiment provides a hydraulic injection molding system: comprising the following steps:
And a data acquisition module: the method comprises the steps of obtaining an injection molding data value of a mold injection molding process; the method is used for obtaining a cooling data value in the cooling process of the die; wherein, include: acquiring injection pressure of an injection screw and initial air pressure in a die cavity; in the injection molding process, based on the displacement value of an injection molding screw, a pressure relief value in a mold cavity is obtained in a server through a data processing module; the displacement value of the injection molding screw is obtained by a distance sensor and marked as W y, the injection molding pressure is obtained by a pressure sensor in a hydraulic system and marked as Y y, and the initial air pressure in the mold cavity is obtained by a pressure sensor at the end part of the injection molding screw and marked as Q c; the air pressure after pressure relief is Q h;
And an adjusting module: for regulating the pressure in the mold cavity of the mold during injection molding;
And a data processing module: for processing the injection data values during injection molding and the cooling data values during cooling; taking the temperature at which the end part of the injection molding screw contacts with the metal pipe in the mold as an initial pipe temperature T 0; simultaneously obtaining the pressure between the end part of the injection molding screw and the metal pipe material at the initial temperature T 0, namely the holding pressure L 0; meanwhile, a displacement point W 0 of the forward movement of the injection screw at the initial temperature T 0 is obtained, unit temperature variation c is taken as an interval temperature section, the holding pressure is kept unchanged by L 0, and the temperature point of each temperature section is marked as T i; the injection molding pressure at the temperature point is marked as Y i, and the displacement point is marked as W i;
and a decision feedback module: the data processing module is used for judging and comparing the data values in the data processing module, generating feedback and sending the feedback to the display control end;
The judging process comprises the following steps: step SS1: acquiring injection pressure Y i and a displacement value W i of an injection screw at a temperature point T i when the injection screw keeps the pressure in a die to be L 0;
step SS2: by passing through Acquiring the change rate alpha of the injection pressure Y i at the moment of a temperature point T i;
step SS3: by passing through Acquiring the change rate beta of the displacement value W i at the moment of the temperature point T i;
Step SS4: the judgment feedback module acquires a preset value from the server, and compares the injection molding pressure change rate and the displacement change rate with the preset value respectively; the preset values comprise a preset injection molding pressure change rate alpha s and a preset displacement change rate beta s;
Step SS5: if the displacement change rate beta is less than 0; the cooled metal blank in the mold contains a gas;
If the displacement change rate beta is more than 0 and alpha is less than 0; incomplete sealing occurs during the cooling process of the mold;
If the displacement change rate beta is more than 0, alpha is more than 0; judging that the die is cooled and pressure-maintaining; comparing the moment ratio of the injection molding pressure to the displacement value with a preset moment ratio;
Step SS6: by passing through Acquiring a moment ratio gamma at a temperature point T i; meanwhile, a preset moment ratio gamma s is obtained;
Comparing the moment ratio gamma with a preset moment ratio gamma s;
when gamma is more than gamma s; indicating the shrinkage rate difference in the cooling forming process of the metal pipe fitting;
When gamma is more than gamma s; the shrinkage rate of the metal pipe fitting in the cooling and forming process is qualified.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (2)
1. The process of adopting the motor seat and lower pipe integrated structure of oil/water injection molding is characterized by comprising the following steps:
step one: pushing the metal pipe material into a die through a hydraulic injection molding system; then cooling the die to solidify the metal blank in the die; comprising the following steps:
S1: acquiring injection pressure of an injection screw and initial air pressure in a die cavity in an injection molding process through a data acquisition module; in the injection molding process, based on the displacement value of an injection molding screw, a pressure relief value in a mold cavity is obtained in a server through a data processing module, then a pressure relief valve is controlled through an adjusting module to relieve pressure, and the air pressure in the mold cavity is obtained after the pressure relief and is compared with the initial air pressure;
S2: after the injection molding of the metal blank is completed, under the condition that the pressure is unchanged in the cooling process acquired by the data acquisition module, the injection molding pressure of the injection molding screw rod is changed in the process of changing the temperature of the pipe material, and meanwhile, the displacement value of the injection molding screw rod is acquired;
S3: based on the data value obtained by the data acquisition module, obtaining the injection pressure change rate required by adjusting the injection screw and the displacement change rate of the injection screw in the pressure keeping process by the data processing module; and sends the result to the judging module;
S4: the judgment feedback module acquires a preset value from the server, compares the injection pressure change rate and the displacement change rate with the preset values respectively, judges the cooling state of the mold, and feeds back the cooling state to the display control end;
Step two: after cooling and solidifying the metal pipe material in the mould, opening the mould and taking out the prepared metal pipe fitting;
Step three: heat treating the metal pipe fitting; bending the metal pipe fitting through a bending machine;
Step four: carrying out hydraulic shaping on the bent metal pipe fitting through a hydraulic shaping system to obtain an integrated to-be-machined part;
Step five: processing the integrated workpiece to be processed through a CNC processing center to obtain a motor seat and lower pipe integrated structure;
In the step S1, the displacement value of the injection screw is obtained by a distance sensor and marked as W y, the injection pressure is obtained by a pressure sensor in a hydraulic system and marked as Y y, the initial air pressure in the mold cavity is obtained by a pressure sensor at the end of the injection screw and marked as Q c, and the air pressure after decompression is Q h;
in the step S1:
If Q h＜Qc; the injection mold is not completely sealed;
If Q h＞Qc; the injection pressure of the injection screw is too high;
If Q h=Qc; the injection molding work is normal;
In the step S2:
After the metal blank is completely injection molded, taking the temperature at which the end part of the injection molding screw contacts with the metal pipe in the mold as an initial pipe temperature T 0; simultaneously obtaining the pressure between the end part of the injection molding screw and the metal pipe material at the initial temperature T 0, namely the holding pressure L 0; meanwhile, a displacement point W 0 of the forward movement of the injection screw at the initial temperature T 0 is obtained, unit temperature variation c is taken as an interval temperature section, the holding pressure is kept unchanged by L 0, and the temperature point of each temperature section is marked as T i; the injection molding pressure at the temperature point is marked as Y i, and the displacement point is marked as W i;
the step S3 includes:
step S31: acquiring injection pressure Y i and a displacement value W i of an injection screw at a temperature point T i when the injection screw keeps the pressure in a die to be L 0;
Step S32: by passing through Acquiring the change rate alpha of the injection pressure Y i at the moment of a temperature point T i;
Step S33: by passing through Acquiring the change rate beta of the displacement value W i at the moment of the temperature point T i;
In the step S4:
the preset values comprise a preset injection molding pressure change rate alpha s and a preset displacement change rate beta s;
In the step S4:
if the displacement change rate beta is less than 0; the cooled metal blank in the mold contains a gas;
If the displacement change rate beta is more than 0 and alpha is less than 0; incomplete sealing occurs during the cooling process of the mold;
If the displacement change rate beta is more than 0, alpha is more than 0; judging that the die is cooled and pressure-maintaining; comparing the moment ratio of the injection molding pressure to the displacement value with a preset moment ratio;
By passing through Acquiring a moment ratio gamma at a temperature point T i; meanwhile, a preset moment ratio gamma s is obtained;
Comparing the moment ratio gamma with a preset moment ratio gamma s;
when gamma is more than gamma s; indicating the shrinkage rate difference in the cooling forming process of the metal pipe fitting;
When gamma is more than gamma s; the shrinkage rate of the metal pipe fitting in the cooling and forming process is qualified.
2. The system of claim 1, wherein the integrated oil/water injection molding motor housing and down tube process comprises:
and a data acquisition module: the method comprises the steps of obtaining an injection molding data value of a mold injection molding process; the method is used for obtaining a cooling data value in the cooling process of the die;
And an adjusting module: for regulating the pressure in the mold cavity of the mold during injection molding;
and a data processing module: for processing the injection data values during injection molding and the cooling data values during cooling;
And a decision feedback module: and the data processing module is used for judging and comparing the data values in the data processing module, generating feedback and sending the feedback to the display control terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311606377.7A CN117381336B (en) | 2023-11-29 | 2023-11-29 | Process and system for motor seat and down tube integrated structure by oil/water injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311606377.7A CN117381336B (en) | 2023-11-29 | 2023-11-29 | Process and system for motor seat and down tube integrated structure by oil/water injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117381336A CN117381336A (en) | 2024-01-12 |
| CN117381336B true CN117381336B (en) | 2024-06-07 |
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