CN110576561B - Manufacturing method of lightweight connecting rod with rubber metal spherical hinge - Google Patents
Manufacturing method of lightweight connecting rod with rubber metal spherical hinge Download PDFInfo
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- CN110576561B CN110576561B CN201910907827.3A CN201910907827A CN110576561B CN 110576561 B CN110576561 B CN 110576561B CN 201910907827 A CN201910907827 A CN 201910907827A CN 110576561 B CN110576561 B CN 110576561B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14868—Pretreatment of the insert, e.g. etching, cleaning
Abstract
A method for manufacturing a lightweight connecting rod with a rubber metal spherical hinge comprises the steps of manufacturing the rubber metal spherical hinge and a reinforcement body respectively, then placing the rubber metal spherical hinge into the reinforcement body, enabling a jacket of the rubber metal spherical hinge to be embedded into a spherical hinge hole in the reinforcement body, then placing the reinforcement body embedded with the rubber metal spherical hinge into a forming die, and wrapping lightweight high polymer materials outside the jacket of the rubber metal spherical hinge and the reinforcement body in an injection molding and mould pressing mode to form the lightweight connecting rod with the rubber metal spherical hinge. According to the invention, the rubber metal spherical hinge is placed in the reinforcement body, and then the lightweight high polymer material is compounded outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body to form the lightweight connecting rod compounded by two materials, so that the bearing capacity of the product in the main bearing direction is improved, and the bearing and application range of the thrust rod is improved.
Description
Technical Field
The invention relates to a manufacturing method of a connecting rod, in particular to a manufacturing method of a lightweight connecting rod with a rubber metal spherical hinge, which can realize the lightweight of the connecting rod, improve the integral strength of the lightweight connecting rod, simplify the structure and reduce the production cost; belongs to the technical field of elastic connection connecting rod manufacturing.
Background
The rubber metal spherical hinge is a commonly used rubber metal composite vibration damping limiting element, can be widely applied to various vibration damping limiting places, and is particularly widely applied to an elastic connection connecting rod. Commonly used structures are generally composite structures where rubber is integrally vulcanized with metal. The rubber metal ball joint is generally combined with other components to form a functional component. Wherein, most of the elastic connecting rods are combined with the connecting rod to form an elastic connecting rod with certain elasticity; one is a thrust rod ball joint. The thrust rod is used as a key force transmission component and widely applied to a suspension system of a motor vehicle, and is mainly used for keeping the position of a vehicle body relatively fixed so as to transmit longitudinal force or transverse force of the vehicle and simultaneously transmit force and moment in other directions, so that a determined motion relation between a wheel and the vehicle body is ensured, and the vehicle has good motion characteristics; the ball hinge of the thrust rod is also the main connecting piece of the thrust rod, and the rubber metal ball hinge is arranged in the joints of the two end heads of the connecting rod to form the elastic connecting rod with the rubber metal ball hinge.
Generally, an elastic connecting rod with a rubber metal spherical hinge is manufactured, the rubber metal spherical hinge is installed in the connecting rod, and the elastic connecting rod with the rubber metal spherical hinge is fixed through a fixing piece. At present, the weight reduction of various industries is being pursued, so the weight reduction of connecting rods also appears, and the weight reduction of the connecting rods at present is generally that a connecting rod joint and a connecting rod body are manufactured separately, wherein the rod body is manufactured into the weight reduction of the rod body, and then the rod body is combined with the joint to form the weight reduction of the connecting rod. The joint and the connecting rod body are lightened, but when the connecting rod is manufactured, a dumpling sleeve is prefabricated in the joint of the connecting rod, and then a rubber metal spherical hinge is installed in the prefabricated sleeve of the connecting rod. The method for combining the dumplings and the joints has the problems that the dumplings and the joints of the connecting rods are not tightly combined, the dumplings and the joints are easy to be displaced, and the method for manufacturing the light-weight connecting rods is troublesome, so that the method is needed to be improved.
Patent documents in which the same technology as that of the present invention is not found through patent search are reported, and the following patents which have a certain relationship with the present invention are mainly included:
1. the patent number is CN201510739066.7, entitled "a thrust rod weight reduction method and lightweight thrust rod", and the applicant is: the invention discloses a thrust rod light-weight method and a light-weight thrust rod, wherein the thrust rod light-weight method is characterized in that a rod body and a mandrel of an elastic spherical hinge are both made of high polymer materials and are formed in one step by using an injection mold, two opposite side surfaces of the rod body are respectively provided with a side surface with an intermittent groove I, the intermittent groove I comprises a plurality of sub-grooves I which are sequentially distributed along the length direction of the rod body, and a plurality of convex ribs are arranged on the bottom surface of each sub-groove I, so that each sub-groove I is divided into a plurality of small grooves by the plurality of convex ribs. The invention can reduce the weight of the thrust rod as much as possible on the premise of meeting the use requirement of the thrust rod, thereby achieving the requirement of light weight of the thrust rod.
2. The patent number is CN201521045394.9, the name is "kind of closed hollow dabber and use damping ball pivot of this dabber", the applicant is: the utility model discloses a new material science and technology limited company's of shoal's time utility model patent, this patent disclose a car lightweight distance rod structure, connect including the distance rod body of rod, distance rod connects the setting at distance rod body of rod both ends, and distance rod is nylon materials manufacturing, and the strengthening rib has been arranged to distance rod body of rod both sides face, and the distance rod body of rod is the same with distance rod joint height, and the width is less than and connects the diameter. The thrust rod is made of nylon materials, the density of the nylon materials is 20% of that of metal materials, the purpose of weight reduction is easy to achieve, meanwhile, the nylon materials can be formed through an injection molding process, the whole thrust rod is formed in one step, the influence of the limitation of a complex structure is small, and the processing cost is low.
3. The patent number is CN201720376836.0, the name is 'a composite rubber metal spherical hinge variable rigidity transition method and composite rubber metal spherical hinge', the applicant is: the utility model discloses a Beijing advanced compound material product design limited company's utility model patent, this patent discloses a big composite material connecting rod connection structure who bears, include: at least one end part of the composite material connecting rod is provided with an inverted tooth groove; the inner wall of the pawl clamping sleeve is provided with pawls matched with the pawl grooves, and the outer wall of the pawl clamping sleeve is provided with external threads; the connecting piece comprises a cylindrical main body and a connecting handle arranged at the end part of the cylindrical main body; and the inner wall of the cylindrical main body is provided with an internal thread matched with the external thread.
Through careful analysis of the above patents, although the patents relate to the lightweight processing of the connecting rod, some improved technical solutions are proposed, but through careful analysis, the connecting rod of the patents still adopts the aforementioned method of manufacturing the connecting rod separately or manufacturing the whole lightweight connecting rod by embedding the steel sleeve into the joint, so the aforementioned problems still exist, and particularly how to compound the rubber metal ball dumpling and the connecting rod to form the elastic connecting rod with the rubber metal ball hinge lacks the technical solutions, and therefore, the improvement needs to be further researched and improved.
Disclosure of Invention
The invention aims to overcome the defects of complex structure, inconvenient manufacture and poor stress condition of the existing manufacturing method of the lightweight connecting rod with the rubber metal spherical hinge; the manufacturing method of the novel lightweight connecting rod with the rubber metal spherical hinge is reasonable in structure, simple in fixing mode and convenient to process and manufacture.
In order to achieve the purpose, the invention provides a method for manufacturing a lightweight connecting rod with a rubber metal spherical hinge, which is characterized by comprising the following steps of: the method comprises the steps of firstly manufacturing a rubber metal spherical hinge and a reinforcement body respectively, then placing the rubber metal spherical hinge into the reinforcement body, embedding an outer sleeve of the rubber metal spherical hinge into a spherical hinge hole in the reinforcement body, then placing the reinforcement body embedded with the rubber metal spherical hinge into a forming die, and wrapping a light-weight high polymer material on the outer sleeve of the rubber metal spherical hinge and the outer surface of the reinforcement body in an injection molding and die pressing mode to form the light-weight connecting rod with the rubber metal spherical hinge.
Furthermore, the first manufacturing of the rubber metal spherical hinge and the reinforcement body respectively is to manufacture the rubber metal spherical hinge and the reinforcement body respectively; the manufacturing of the rubber metal spherical hinge is that a metal piece and a rubber piece of the metal spherical hinge are compounded together according to the requirement of a connecting rod to form the rubber metal spherical hinge with an integral structure; the manufacturing of the reinforcement body is that according to the stress characteristics of the connecting rod, a metal or composite material with the strength higher than that of the lightweight polymer material matrix is adopted to manufacture a rod-shaped reinforcement body embedded in the lightweight polymer material matrix of the joint and the connecting rod body; the material of the reinforcement is metal or polymer composite material.
Furthermore, the rubber metal spherical hinge is integrally inserted into the joint reinforcing body part of the reinforcing body; the joint strengthening body part is provided with a spherical hinge hole, and the rubber metal spherical hinge is integrally inserted into the spherical hinge hole of the joint strengthening body, so that the outer sleeve of the rubber metal spherical hinge is clamped in the spherical hinge hole of the joint strengthening body.
Furthermore, the step of placing the reinforcement body embedded with the rubber metal spherical hinge into a forming die is that after the rubber metal spherical hinge is inserted into the spherical hinge hole of the joint reinforcement body, the reinforcement body and the rubber metal spherical hinge are placed into a light-weight high polymer material matrix forming die together, and the light-weight connecting rod with the rubber metal spherical hinge is manufactured through injection molding or compression molding.
Further, the light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body in an injection molding and mould pressing mode, the reinforcement body and the rubber metal spherical hinge are placed in the middle of a cavity of a mould, the periphery of the reinforcement body and the outer sleeve of the rubber metal spherical hinge is compounded to form a light-weight polymer material matrix, the reinforcement body is embedded into the light-weight polymer material matrix to form a framework, and the light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body.
Furthermore, the light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcing body in an injection molding or compression molding mode, so that the light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcing body in an injection molding or compression molding mode to form a light-weight polymer material base body.
Furthermore, the injection molding or compression molding is that the rubber metal spherical hinge and the reinforcement body are placed in an injection mold together, and the joint of the connecting rod and the connecting rod body are subjected to one-time injection molding or compression molding; the preparation steps are as follows:
1) selecting the model of an injection mold;
2) preheating the rubber metal spherical hinge, wherein the preheating temperature is set to be 70-90 ℃, and the preheating time is 0.5-1.5 h;
3) placing a rubber metal spherical hinge and a reinforcement body according to the requirement of the angle of the spherical hinge; placing the reinforcing body in a die, and installing holes at two ends of the reinforcing body in a matched manner with the spherical hinge;
4) injection molding: injecting plastic particles dried for 2-3 hours at the temperature of 80-100 ℃ into a mold for manufacturing the lightweight connecting rod, and realizing the bonding of a polymer sleeve and joints at two ends in the injection molding process to finally form a lightweight connecting rod assembly; when the plastic particles are subjected to injection molding or compression molding, the melt temperature is controlled to be 280-320 ℃, and the mold temperature is controlled to be 70-100 ℃; performing pressure maintaining treatment after injection molding;
5) and (3) cooling treatment: and (4) carrying out physical cooling treatment on the lightweight connecting rod obtained in the step (4), wherein the cooling time is 60-120S, and then sampling and naturally cooling to normal temperature.
Further, the plastic particles in the step 4 adopt nylon and glass fiber, and the content of the glass fiber is 30-60%.
Furthermore, the outer surface layers of the reinforcing body and the metal spherical hinge sleeve are coated with bonding glue, so that the light-weight high polymer material can be bonded with the outer surfaces of the reinforcing body and the metal spherical hinge sleeve in the injection molding process.
Further, the injection molding or compression molding comprises the simultaneous injection molding or compression molding of the axial stop of the rubber metal spherical hinge outer sleeve; the axial backstop of the rubber metal spherical hinge outer sleeve and the light-weight polymer material base body are molded by injection or compression together to form the axial backstop of the rubber metal spherical hinge outer sleeve.
Further, the lightweight polymer material is a polymer composite material, and comprises any one or more than two polymer materials of nylon (polyamide), polystyrene foam plastics, melamine resin foam plastics, polylactic acid resin foam plastics, polyethylene terephthalate resin foam plastics and thermoplastic polyurethane foam plastics, and composite fiber reinforced lightweight polymer materials; the reinforcement body is a metal or nonmetal composite material, and the strength of the reinforcement body is higher than that of a metal or nonmetal composite material of a surrounding lightweight polymer material; the surface of the strengthening body is coated with glue, the matrix and the strengthening body are bonded together in the injection molding process, and the strengthening body is embedded in the light-weight high polymer material matrix.
The invention has the advantages that:
the metal rubber spherical hinge and the reinforcement body are placed in the die, so that the lightweight polymer composite material matrix can be wrapped on the metal rubber spherical hinge and the reinforcement body when being formed, and the lightweight polymer composite material has the following main advantages:
1. the binding force of the metal rubber spherical hinge, the reinforcer and the light-weight polymer composite material substrate can be effectively improved, the binding performance of the light-weight polymer material, the reinforcer and the metal rubber spherical hinge is improved, and the bearing and application range of the light-weight connecting rod is improved.
2. The metal rubber ball hinge and the reinforcement body are placed into the die together, and the lightweight high polymer material is directly wrapped outside the metal rubber ball hinge and the reinforcement body, so that the installation process of the metal rubber ball hinge is simplified, and the damage of the metal ball hinge during additional installation is avoided.
3. The metal rubber ball hinge is embedded into the ball hinge hole of the reinforcement body and then organically combined with the light-weight high polymer material, so that the bearing capacity of the product in the main bearing direction is improved.
4. The tensile load in the shaft body direction is greatly improved by compounding the reinforcement body, so that the disadvantage of weak strength of the glue injection point or the product dissolution line is avoided.
Drawings
FIG. 1 is a schematic structural view of one embodiment of a lightweight connecting rod with a metal spherical hinge according to the present invention;
FIG. 2 is a schematic view of a metal spherical hinge structure;
FIG. 3 is a schematic top view of a metal ball hinge structure;
FIG. 4 is a schematic view of a reinforcement structure;
fig. 5 is a schematic view of the metal ball hinge and reinforcement body being placed together in a mold.
Detailed Description
The invention is further illustrated with reference to the following figures and specific examples.
Example one
As can be seen from the attached drawings 1-4, the invention relates to a method for manufacturing a lightweight connecting rod with a rubber metal spherical hinge, which comprises the steps of firstly manufacturing a rubber metal spherical hinge 1 and a reinforcement body 2 respectively, then placing the rubber metal spherical hinge 1 into the reinforcement body 2, embedding an outer sleeve 5 of the rubber metal spherical hinge into a spherical hinge hole 4 in the reinforcement body 2, then placing the reinforcement body 2 embedded with the rubber metal spherical hinge 1 into a forming die 6, and wrapping a lightweight high polymer material outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body in an injection molding mode to form a lightweight connecting rod base body 3, thereby forming the lightweight connecting rod with the rubber metal spherical hinge. The specific manufacturing method is as follows:
1) respectively manufacturing a rubber metal spherical hinge and a reinforcing body; the manufacturing method comprises the following steps that a rubber metal spherical hinge 1 is manufactured, according to the requirement of a connecting rod, a metal piece and a rubber piece of the metal spherical hinge are combined together, and the rubber metal spherical hinge 1 with an integral structure is formed; the manufacturing of the reinforcement body 2 is that according to the stress characteristics of the connecting rod, the integral rod-shaped reinforcement body 2 embedded in the joint and the connecting rod body is manufactured by adopting metal materials with the strength higher than light weight; the material of the reinforcement body 2 is a light metal material; the reinforcement body 2 comprises a joint reinforcement body and a connecting rod reinforcement body, the joint reinforcement body and the connecting rod reinforcement body are connected together to form an integral reinforcement body, and a spherical hinge hole 4 is formed in the joint reinforcement body part;
2) selecting the model of an injection mold; selecting a proper mold according to the shape of the connecting rod, cleaning the inner cavity of the mold, and coating a release agent; the mold is a mold with an upper mold and a lower mold, and comprises an upper mold 7 and a lower mold 8, wherein the upper mold and the lower mold are respectively provided with an adjusting block 11, and the adjusting blocks 11 are used for selecting according to the size of the light-weight connecting rod base body 3, so that after the rubber metal spherical hinge 1 is placed in the mold, the rubber layer 9 of the rubber metal spherical hinge 1 is isolated from the light-weight base body 5 with injection molding, and the rubber layer of the metal rubber spherical hinge is prevented from being damaged;
3) preheating a rubber metal spherical hinge: putting the rubber metal spherical hinge into a preheating furnace, and integrally preheating the rubber metal spherical hinge; the preheating temperature is set to be 60-90 degrees, and the preheating time is 0.5-1.5 h;
4) die filling: placing a rubber metal spherical hinge 1 and a reinforcement body 2 according to the requirement of the spherical hinge angle, and integrally inserting the rubber metal spherical hinge 1 into a spherical hinge hole 4 part of a joint reinforcement body of the reinforcement body 2 so that an outer sleeve 5 of the rubber metal spherical hinge 1 is clamped in the spherical hinge hole 4 of the joint reinforcement body; then placing the reinforcement body 2 and the rubber metal spherical hinge 1 into a die together, and installing holes at two ends of the reinforcement body 2 and the rubber metal spherical hinge 1 in a matching way; in order to ensure the position of the metal spherical hinge, the rubber metal spherical hinge positioned in the spherical hinges at the two ends is fixed on the mandrel part of the rubber metal spherical hinge extending out of the die through a positioning sleeve rod, so that the accuracy of the distance between the rubber metal spherical hinges in the spherical hinges at the two ends is maintained; meanwhile, the rubber layer 9 and the injection molding cavity 10 of the rubber metal spherical hinge 1 are isolated by the isolation block 12, and the rubber layer 9 is further prevented from being damaged during injection molding.
5) Injection molding: injecting the plastic particles dried for 2-3 hours under the environment of 80-100 degrees into a mould for manufacturing the lightweight connecting rod, and realizing the bonding of the high polymer sleeve and the joints at two ends in the injection molding process to finally form the lightweight connecting rod assembly; when the plastic particles are molded by injection, the temperature of a melt is strictly controlled to be 280-320 ℃, the temperature of a mold is 70-100 ℃, and after the injection is finished, pressure maintaining is carried out, wherein the pressure maintaining pressure is 60-100bar, and the pressure maintaining time is controlled to be 5-30S;
6) cooling treatment: and (4) cooling the lightweight connecting rod obtained in the step (4) by using cooling water for 80-120S, and then sampling and naturally cooling to normal temperature.
The method comprises the steps of placing a reinforcing body embedded with a rubber metal spherical hinge into a forming die, after inserting the rubber metal spherical hinge into a spherical hinge hole of a joint reinforcing body, placing the reinforcing body and the rubber metal spherical hinge into a light-weight high polymer material substrate forming die, and manufacturing the light-weight connecting rod with the rubber metal spherical hinge through injection molding.
The light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body in an injection molding mode, the reinforcement body and the rubber metal spherical hinge are placed in the middle of a cavity of a mold, the periphery of the reinforcement body and the outer sleeve of the rubber metal spherical hinge is compounded to form a light-weight polymer material matrix, the reinforcement body is embedded into the light-weight polymer material matrix to form a framework, and the light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body.
The light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcing body in an injection molding mode, and the light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcing body in an injection molding mode to form a light-weight polymer material substrate.
The plastic particles are made of nylon and glass fiber, and the content of the glass fiber is 30-60%.
The surface layers of the reinforcing body and the metal spherical hinge sleeve are coated with a layer of structural adhesive, so that the base body and the reinforcing body are better bonded together in the injection molding process.
The injection molding comprises the simultaneous injection molding of the axial backstop of the rubber metal spherical hinge outer sleeve; the axial backstop of the rubber metal spherical hinge outer sleeve and the light-weight high polymer material substrate are molded together in an injection mode to form the axial backstop of the rubber metal spherical hinge outer sleeve.
The lightweight high polymer material is nylon and glass fiber; the reinforcer is made of light metal materials, including aluminum alloy materials, magnesium-based alloy materials and titanium alloy materials; epoxy or acrylate structural adhesive is coated on the surface layer of the reinforcement body, so that the matrix and the reinforcement body are better bonded together in the injection molding process.
Example two
The second principle of the embodiment is the same as that of the first principle of the embodiment, but the structure is slightly different, and the manufacturing method of the lightweight connecting rod with the rubber metal ball hinge is characterized in that the rubber metal ball hinge and the reinforcement body are manufactured respectively, then the rubber metal ball hinge is placed into the reinforcement body, the outer sleeve of the rubber metal ball hinge is embedded into the ball hinge hole in the reinforcement body, then the reinforcement body embedded with the rubber metal ball hinge is placed into a forming die, and a lightweight high polymer material is wrapped outside the outer sleeve of the rubber metal ball hinge and the reinforcement body in a die pressing mode to form the lightweight connecting rod with the rubber metal ball hinge.
The specific manufacturing method is as follows:
1) respectively manufacturing a rubber metal spherical hinge and a reinforcing body; the manufacturing method comprises the following steps that a metal piece and a rubber piece of the metal spherical hinge are combined together according to the requirement of a connecting rod to form the rubber metal spherical hinge with an integral structure; the manufacturing of the reinforcement body is that according to the stress characteristic of the connecting rod, a nonmetal composite material with the strength higher than that of a lightweight polymer material matrix is adopted to respectively manufacture a joint reinforcement body and a connecting rod reinforcement body which are embedded in the lightweight polymer material matrix of the joint and the connecting rod body, and then the joint reinforcement body and the connecting rod reinforcement body are connected together to form an integral reinforcement body; the joint strengthening body is sleeve-shaped, a spherical hinge hole is formed in the center of the joint strengthening body, and the rubber metal spherical hinge is integrally inserted into the spherical hinge hole of the joint strengthening body, so that the outer sleeve of the rubber metal spherical hinge is clamped in the spherical hinge hole of the joint strengthening body; the material of the reinforcement body is a non-metal polymer composite material, including reinforced nylon (polyamide), reinforced plastic and other materials; before injection molding, a layer of structural adhesive is coated on the surface layer of the reinforcement body, and the matrix and the reinforcement body are better bonded together in the injection molding process.
2) Selecting the model of an injection mold; selecting a proper mold according to the shape of the connecting rod, cleaning the inner cavity of the mold, and coating a release agent;
3) preheating a rubber metal spherical hinge: putting the rubber metal spherical hinge into a preheating furnace, and integrally preheating the rubber metal spherical hinge; the preheating temperature is set to be 60-90 degrees, and the preheating time is 0.5-1.5 h;
4) die filling: placing a rubber metal spherical hinge and a reinforcement body according to the angle requirement of the spherical hinge, and integrally inserting the rubber metal spherical hinge into a joint reinforcement body part of the reinforcement body; then placing the reinforcement body and the rubber metal spherical hinge into a pressing die mold, and installing holes at two ends of the reinforcement body in a matched manner with the spherical hinge; in order to ensure the position of the metal spherical hinge, the rubber metal spherical hinge positioned in the spherical hinges at two ends is fixed on the mandrel part of the rubber metal spherical hinge extending out of the die through a positioning sleeve rod;
5) and (3) injection molding: paving plastic particles dried for 2-3 hours under the environment of 80-100 ℃ into a die for manufacturing the lightweight connecting rod, and realizing the bonding of a polymer sleeve and joints at two ends in the injection molding process to finally form the lightweight connecting rod assembly; when the plastic particles are molded by pressure injection, the melt temperature is 280-320 ℃, the mold temperature is 70-100 ℃, the pressure is maintained after the pressure injection molding, the pressure maintaining pressure is 60-100bar, and the pressure maintaining time is controlled to be 5-10S;
6) cooling treatment: and (4) carrying out air cooling treatment on the lightweight connecting rod obtained in the step (4), wherein the cooling time is 100S, and then sampling and naturally cooling.
The method comprises the steps of placing a reinforcing body embedded with a rubber metal spherical hinge into a forming die, after inserting the rubber metal spherical hinge into a spherical hinge hole of a joint reinforcing body, placing the reinforcing body and the rubber metal spherical hinge into a light-weight high polymer material substrate forming die, and manufacturing the light-weight connecting rod with the rubber metal spherical hinge through injection molding.
The light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body in a pressure injection molding mode, the reinforcement body and the rubber metal spherical hinge are placed in the middle of a cavity of a mold, the periphery of the outer sleeve of the reinforcement body and the rubber metal spherical hinge is compounded to form a light-weight polymer material matrix, the reinforcement body is embedded into the light-weight polymer material matrix to form a framework, and the light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body.
The light-weight high polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body in an injection molding mode, so that a light-weight high polymer material matrix is formed.
The plastic particles are made of nylon and glass fiber, and the content of the glass fiber is 30-60%.
The reinforcing body and the outer surface layer of the metal spherical hinge sleeve are coated with bonding glue, so that the light-weight high polymer material can be bonded with the outer surfaces of the reinforcing body and the metal spherical hinge sleeve in the injection molding process.
The pressure injection molding comprises the simultaneous pressure injection molding of the axial backstop of the rubber metal spherical hinge outer sleeve; the axial backstop of the rubber metal spherical hinge outer sleeve and the light-weight high polymer material substrate are molded by co-injection molding to form the axial backstop of the rubber metal spherical hinge outer sleeve.
The lightweight polymer material is a polymer composite material and comprises any one or more than two polymer materials of nylon, polystyrene foam plastics, melamine resin foam plastics, polylactic acid resin foam plastics, polyethylene terephthalate resin foam plastics and thermoplastic polyurethane foam plastics; the reinforcement is a non-metal polymer composite material or a high-strength light metal material, and comprises various high-strength polymer-based composite materials or composite fiber materials and metal-based composite materials, wherein the metal-based composite materials comprise aluminum alloy, titanium alloy and magnesium alloy materials; the non-metal based composite material comprises a non-metal matrix, a composite material and a composite material, wherein the non-metal matrix is synthetic resin, rubber and plastic, and is added with reinforcing materials such as glass fiber, carbon fiber, boron fiber, aramid fiber, silicon carbide fiber, asbestos fiber and whisker; epoxy or acrylate structural adhesive is coated on the surface layer of the reinforcement body, so that the matrix and the reinforcement body are better bonded together in the injection molding process, and the reinforcement body is embedded in the matrix.
The above listed embodiments are only for clear and complete description of the technical solution of the present invention with reference to the accompanying drawings; it should be understood that the embodiments described are only a part of the embodiments of the present invention, and not all embodiments, and the terms such as "upper", "lower", "front", "back", "middle", etc. used in this specification are for clarity of description only, and are not intended to limit the scope of the invention, which can be implemented, and the changes or modifications of the relative relationship thereof are also regarded as the scope of the invention without substantial technical changes. Meanwhile, the structures, the proportions, the sizes, and the like shown in the drawings are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the conditions under which the present invention can be implemented, so that the present invention has no technical essence, and any structural modification, changes in proportion relation, or adjustments of the sizes, can still fall within the range covered by the technical contents disclosed in the present invention without affecting the effects and the achievable purposes of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Through the description of the embodiments, it can be known that the invention relates to a manufacturing method of a lightweight connecting rod with a rubber metal spherical hinge, which is characterized in that: the method comprises the steps of firstly manufacturing a rubber metal spherical hinge and a reinforcement body respectively, then placing the rubber metal spherical hinge into the reinforcement body, embedding an outer sleeve of the rubber metal spherical hinge into a spherical hinge hole in the reinforcement body, then placing the reinforcement body embedded with the rubber metal spherical hinge into a forming die, and wrapping a light-weight high polymer material on the outer sleeve of the rubber metal spherical hinge and the outer surface of the reinforcement body in an injection molding and die pressing mode to form the light-weight connecting rod with the rubber metal spherical hinge.
Furthermore, the rubber metal spherical hinge and the reinforcement body are manufactured respectively; the manufacturing method comprises the following steps that a metal piece and a rubber piece of the metal spherical hinge are combined together according to the requirement of a connecting rod to form the rubber metal spherical hinge with an integral structure; the manufacturing of the reinforcement body is that according to the stress characteristics of the connecting rod, a metal or composite material with the strength higher than that of the lightweight polymer material matrix is adopted to manufacture a rod-shaped reinforcement body embedded in the lightweight polymer material matrix of the joint and the connecting rod body; the material of the reinforcement is metal or polymer composite material.
Furthermore, the rubber metal spherical hinge is integrally inserted into the joint reinforcing body part of the reinforcing body; the joint strengthening body part is provided with a spherical hinge hole, and the rubber metal spherical hinge is integrally inserted into the spherical hinge hole of the joint strengthening body, so that the outer sleeve of the rubber metal spherical hinge is clamped in the spherical hinge hole of the joint strengthening body.
Furthermore, the step of placing the reinforcement body embedded with the rubber metal spherical hinge into a forming die is to insert the rubber metal spherical hinge into the spherical hinge hole of the joint reinforcement body, then place the reinforcement body and the rubber metal spherical hinge together into a light-weight high polymer material matrix forming die, and manufacture the light-weight connecting rod with the rubber metal spherical hinge through injection molding or compression molding.
Further, the light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body in an injection molding and mould pressing mode, the reinforcement body and the rubber metal spherical hinge are placed in the middle of a cavity of a mould, the periphery of the reinforcement body and the outer sleeve of the rubber metal spherical hinge is compounded to form a light-weight polymer material matrix, the reinforcement body is embedded into the light-weight polymer material matrix to form a framework, and the light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body.
Furthermore, the light-weight polymer material is wrapped outside the outer sleeve and the reinforcing body of the rubber metal spherical hinge in an injection molding and mould pressing mode, and the light-weight polymer material is wrapped outside the outer sleeve and the reinforcing body of the rubber metal spherical hinge in an injection molding mode to form a light-weight polymer material substrate.
Furthermore, the injection molding or compression molding is that the rubber metal spherical hinge and the reinforcement body are placed in an injection mold together, and the joint of the connecting rod and the connecting rod body are subjected to one-time injection molding or compression molding; the preparation steps are as follows:
1) selecting the model of an injection mold;
2) preheating the rubber metal spherical hinge, wherein the preheating temperature is set to 80 degrees, and the preheating time is 1 h;
3) according to the requirements of the angle of the spherical hinge, placing a rubber metal spherical hinge and a reinforcement body; placing the reinforcement body in a die, and installing holes at two ends of the reinforcement body in a matching way with the spherical hinge;
4) injection molding or compression molding: injecting the plastic particles dried for 2-3 hours under the environment of 80-100 degrees into a mould for manufacturing the lightweight connecting rod, and realizing the bonding of the high polymer sleeve and the joints at two ends in the injection molding process to finally form the lightweight connecting rod assembly; when the plastic particles are subjected to injection molding or compression molding, the melt temperature is 280-320 ℃, the mold temperature is 70-100 ℃, the injection molding time is 2-5S, the injection molding speed is 20-100mm/S, the injection molding pressure is 90-140bar, the pressure maintaining pressure is 60-100bar, and the pressure maintaining time is controlled to be 5-10S;
5) cooling treatment: and (4) cooling the lightweight connecting rod obtained in the step (4) for 100S, and then sampling and naturally cooling.
Further, the plastic particles in the step 4 adopt nylon and glass fiber, and the content of the glass fiber is 30-60%.
Furthermore, the outer surface layers of the reinforcing body and the metal spherical hinge sleeve are coated with bonding glue, so that the light-weight high polymer material can be bonded with the outer surfaces of the reinforcing body and the metal spherical hinge sleeve in the injection molding process.
Further, the injection molding or compression molding comprises the simultaneous injection molding or compression molding of the axial stop of the rubber metal spherical hinge outer sleeve; the axial backstop of the rubber metal spherical hinge outer sleeve and the light-weight polymer material base body are molded by injection or compression together to form the axial backstop of the rubber metal spherical hinge outer sleeve.
Further, the lightweight polymer material is a polymer composite material, and comprises any one or more than two polymer materials of polystyrene foam plastics, melamine resin foam plastics, polylactic acid resin foam plastics, polyethylene terephthalate resin foam plastics and thermoplastic polyurethane foam plastics; the reinforced body is made of metal or nonmetal conforming materials, the strength of the reinforced body is higher than that of a metal or nonmetal composite material of a surrounding light-weighted high polymer material, glue is coated on the surface layer of the reinforced body, the base body and the reinforced body are bonded together in the injection molding or compression molding process, and the reinforced body is embedded in the base body.
The invention has the advantages that:
the metal rubber spherical hinge and the reinforcement body are placed in the die, so that the lightweight polymer composite material matrix can be wrapped on the metal rubber spherical hinge and the reinforcement body when being formed, and the lightweight polymer composite material has the following main advantages:
1. the binding force of the metal rubber spherical hinge, the reinforcer and the light-weight polymer composite material substrate can be effectively improved, the binding performance of the light-weight polymer material, the reinforcer and the metal rubber spherical hinge is improved, and the bearing and application range of the light-weight connecting rod is improved.
2. The metal rubber ball hinge and the reinforcement body are placed into the die together, and the lightweight high polymer material is directly wrapped outside the metal rubber ball hinge and the reinforcement body, so that the installation process of the metal rubber ball hinge is simplified, and the damage of the metal ball hinge during additional installation is avoided.
3. The metal rubber ball hinge is embedded into the ball hinge hole of the reinforcement body and then organically combined with the light-weight high polymer material, so that the bearing capacity of the product in the main bearing direction is improved.
4. The tensile load in the shaft body direction is greatly improved by compounding the reinforcement body, so that the disadvantage of weak strength of the glue injection point or the product dissolution line is avoided.
Claims (8)
1. A manufacturing method of a lightweight connecting rod with a rubber metal spherical hinge is characterized by comprising the following steps: firstly, respectively manufacturing a rubber metal spherical hinge and a reinforcement body, then placing the rubber metal spherical hinge into the reinforcement body, embedding the outer sleeve of the rubber metal spherical hinge into a spherical hinge hole in the reinforcement body, then placing the reinforcement body embedded with the rubber metal spherical hinge into a forming mold, and wrapping a lightweight high polymer material outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body in an injection molding mode to form a lightweight connecting rod substrate, so as to form a lightweight connecting rod with the rubber metal spherical hinge; the specific manufacturing method is as follows:
1) respectively manufacturing a rubber metal spherical hinge and a reinforcing body; the manufacturing method comprises the following steps that a metal piece and a rubber piece of the rubber metal spherical hinge are combined together according to the requirement of a connecting rod to form the rubber metal spherical hinge with an integral structure; the manufacturing of the reinforcement body is that according to the stress characteristic of the connecting rod, an integral rod-shaped reinforcement body embedded in the joint and the connecting rod body is manufactured by adopting a metal material with the strength higher than the light weight; the material of the reinforcement body is a light metal material; the joint strengthening body and the connecting rod strengthening body are connected together to form an integral strengthening body, and the joint strengthening body part is provided with a spherical hinge hole;
2) selecting the model of an injection mold; selecting a proper mold according to the shape of the connecting rod, cleaning the inner cavity of the mold, and coating a release agent; the mold is a mold with an upper mold and a lower mold, the upper mold and the lower mold are both provided with adjusting blocks, the adjusting blocks are selected according to the size of a lightweight connecting rod base body, and after the rubber metal spherical hinge is placed in the mold, a rubber layer of the rubber metal spherical hinge is isolated from the lightweight base body to be injected, so that the damage of the rubber layer of the metal rubber spherical hinge is prevented;
3) preheating a rubber metal spherical hinge: putting the rubber metal spherical hinge into a preheating furnace, and integrally preheating the rubber metal spherical hinge; the preheating temperature is set to be 60-90 ℃, and the preheating time is 0.5-1.5 h;
4) die filling: placing a rubber metal spherical hinge and a reinforcement body according to the requirement of the angle of the spherical hinge, and integrally inserting the rubber metal spherical hinge into the spherical hinge hole part of the joint reinforcement body of the reinforcement body so that the outer sleeve of the rubber metal spherical hinge is clamped in the spherical hinge hole of the joint reinforcement body; then placing the reinforcement body and the rubber metal spherical hinge into a die together, and installing holes at two ends of the reinforcement body and the rubber metal spherical hinge in a matching way; in order to ensure the position of the rubber metal spherical hinge, the rubber metal spherical hinge positioned in the spherical hinges at the two ends is fixed on the mandrel part of the rubber metal spherical hinge extending out of the die through a positioning sleeve rod, so that the accuracy of the distance between the rubber metal spherical hinges in the spherical hinges at the two ends is maintained; meanwhile, the rubber layer of the rubber metal spherical hinge is isolated from the injection molding cavity through the isolation block, so that the rubber layer is further prevented from being damaged during injection molding;
5) injection molding: injecting the plastic particles dried for 2-3 hours at 80-100 ℃ into a mould for manufacturing the lightweight connecting rod, and realizing the bonding of a polymer sleeve and joints at two ends in the injection molding process to finally form a lightweight connecting rod assembly; when the plastic particles are molded by injection, the melt temperature must be strictly controlled at 280-320 ℃, the mold temperature is 70-100 ℃, and after the injection is finished, pressure maintaining is carried out, wherein the pressure maintaining pressure is 60-100bar, and the pressure maintaining time is controlled at 5-30S;
6) cooling treatment: and (4) cooling the lightweight connecting rod obtained in the step (4) by using cooling water for 80-120S, and then sampling and naturally cooling to normal temperature.
2. The method for manufacturing a lightweight connecting rod with a rubber metal spherical hinge according to claim 1, wherein: the rubber metal spherical hinge and the reinforcement body are manufactured respectively; the manufacturing method comprises the following steps that a metal piece and a rubber piece of the rubber metal spherical hinge are combined together according to the requirement of a connecting rod to form the rubber metal spherical hinge with an integral structure; the manufacturing of the reinforcement body is that according to the stress characteristics of the connecting rod, a metal or composite material with the strength higher than that of the lightweight polymer material matrix is adopted to manufacture a rod-shaped reinforcement body embedded in the lightweight polymer material matrix of the joint and the connecting rod body; the material of the reinforcement is metal or polymer composite material.
3. The method for manufacturing a lightweight connecting rod with a rubber metal spherical hinge according to claim 2, wherein: the rubber metal spherical hinge is integrally inserted into the joint reinforcing body part of the reinforcing body; the joint strengthening body part is provided with a spherical hinge hole, and the rubber metal spherical hinge is integrally inserted into the spherical hinge hole of the joint strengthening body, so that the outer sleeve of the rubber metal spherical hinge is clamped in the spherical hinge hole of the joint strengthening body.
4. The method for manufacturing a lightweight connecting rod with a rubber metal spherical hinge according to claim 3, wherein: the step of placing the reinforcement body embedded with the rubber metal spherical hinge into a forming die is that after the rubber metal spherical hinge is inserted into a spherical hinge hole of the joint reinforcement body, the reinforcement body and the rubber metal spherical hinge are placed into a light-weight high polymer material matrix forming die together, and the light-weight connecting rod with the rubber metal spherical hinge is manufactured through injection molding or compression molding.
5. The method for manufacturing a lightweight connecting rod with a rubber metal spherical hinge according to claim 3, wherein: the light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body in an injection molding mode, the reinforcement body and the rubber metal spherical hinge are placed in the middle of a cavity of a mold, the periphery of the outer sleeve of the reinforcement body and the rubber metal spherical hinge is compounded to form a light-weight polymer material matrix, the reinforcement body is embedded into the light-weight polymer material matrix to form a framework, and the light-weight polymer material is wrapped outside the outer sleeve of the rubber metal spherical hinge and the reinforcement body.
6. The method for manufacturing a lightweight connecting rod with a rubber metal spherical hinge according to claim 1, wherein: the plastic particles in the step 5 adopt nylon and glass fiber, and the content of the glass fiber is 30-60%.
7. The method for manufacturing a lightweight connecting rod with a rubber metal spherical hinge according to claim 1, wherein: the outer surfaces of the reinforcing body and the outer sleeve are coated with bonding glue, so that the lightweight high polymer material can be bonded with the outer surfaces of the reinforcing body and the rubber metal spherical hinge outer sleeve in the injection molding process.
8. The method for manufacturing a lightweight connecting rod with a rubber metal spherical hinge according to claim 1, wherein: the injection molding comprises the simultaneous injection molding of the rubber metal spherical hinge outer sleeve axial stop; the axial backstop of the rubber metal spherical hinge outer sleeve and the light-weight high polymer material substrate are molded together in an injection mode to form the axial backstop of the rubber metal spherical hinge outer sleeve.
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