Preparation method of heavy truck radiator fan clutch friction plate and rubber coating equipment thereof

Abstract

The present application relates to the technical field of friction plate production, in particular to a heavy truck heat dissipation fan clutch friction plate preparation method, which comprises mixing, pressing, heat treatment, grinding, turning and packaging; the glue coating equipment comprises a support, the support is respectively provided with a guide mechanism, a glue coating mechanism and a replacement mechanism, a glue outlet controller is installed at the top of the support, the glue outlet controller is connected with the pipeline of the glue coating mechanism, the glue coating mechanism comprises a glue pushing structure and a stirring part, and the replacement mechanism is arranged below the glue coating mechanism. The equipment can uniformly coat the friction plate, the process flow is fully automated, and the efficiency of the glue coating process is greatly improved.

Description

Technical Field

[0001] This invention patent relates to the field of friction plate manufacturing technology, and in particular to a method for preparing friction plates for a heavy-duty truck cooling fan clutch and its adhesive coating equipment. Background Technology

[0002] Currently, powder metallurgy friction plates are mainly copper-iron hybrid friction materials, and the main processes are mixing, pressing, and sintering. After the friction plates are manufactured, an adhesive coating step is required. Heavy-duty truck radiator fans place even stricter requirements on clutch friction plates, thus necessitating the research and development of a high-performance radiator fan clutch friction plate.

[0003] In existing technologies, many ideas have been proposed for the coating methods and equipment of friction plates. For example, CN115870161A uses a method of applying glue first and then scraping with a glue scraper to achieve uniform glue application. However, in actual use, the control of glue amount and scraper force needs to be judged according to the area size and glue absorption of different friction plates, which is difficult to promote in practice. CN205816067U uses a brush to apply glue, achieving semi-automatic glue application, but still requires manual intervention, and the brush needs to be constantly dipped in glue, affecting work efficiency. Therefore, in terms of glue application equipment, a fully automated production line cannot yet be fully realized. It is necessary to develop a fully automatic glue application device to achieve uniform and efficient glue application to friction plates. Summary of the Invention

[0004] (I) Problems to be solved

[0005] This invention is mainly used to solve the problems of uneven adhesive application during the manufacturing process and the inability to achieve full automation in improving the performance of existing friction plates. It provides a method for preparing friction plates for heavy-duty truck cooling fan clutches and its adhesive application equipment.

[0006] (II) Technical Solution

[0007] This invention discloses a method for preparing friction plates for a heavy-duty truck cooling fan clutch, comprising the following steps:

[0008] S1: Mixing. Put the materials into a 1200L plow-type mixer for dry mixing. Set the speed to 85r / min, set the flying knife mode, and the mixing time to 20-60min.

[0009] S2: Pressing, using a hot press, with pressure set at 35-60 MPa, temperature set at 150-175℃, and pressing time at 6 minutes;

[0010] S3: Heat treatment. Place the pressed friction sheet into a high-temperature oven, set the temperature to 150-200℃, and heat treatment time to 4-12 hours.

[0011] S4: Grinding process, where the heat-treated friction pads are placed in a belt grinder for processing;

[0012] S5: Machining, machining the friction plate using a lathe;

[0013] S6: Packaging, packaging the products according to customer requirements.

[0014] As a preferred technical solution, the heat treatment section of S3 adopts a segmented heat treatment method.

[0015] The present invention also provides a heavy-duty truck cooling fan clutch friction plate coating device, including a bracket, a guide mechanism, a coating mechanism and a replacement mechanism respectively installed on the bracket, a glue dispensing controller installed on the top of the bracket, the glue dispensing controller being connected to the coating mechanism via a pipe, the coating mechanism including a glue pushing structure and a stirring part, and a replacement mechanism provided below the coating mechanism.

[0016] As a preferred technical solution, the guiding mechanism includes a lead screw, a slide rail is provided at the front end of the lead screw, a first positioning plate is bolted to the front end of the slide rail, a second positioning plate is bolted to the front end of the first positioning plate, and an adhesive applicator is fixedly installed at the front end of the second positioning plate.

[0017] As a preferred technical solution, the adhesive pushing structure includes a pair of pushing cylinders and an adhesive tube. The forward end of the pushing cylinder is placed inside the adhesive tube. The adhesive tube is divided into two cavities, left and right, which are respectively filled with AB adhesive. A stirring part is installed between the left and right cavities.

[0018] As a preferred technical solution, the stirring part includes a rotating shaft, a rotating motor is fixedly installed at one end of the rotating shaft, and a first stirring blade, a second stirring blade and a third stirring blade are fixedly installed on the rotating shaft. The blade tip of the first stirring blade is lower than the blade tip of the second stirring blade, and the blade tip of the third stirring blade is level with the blade tip of the first stirring blade and lower than the blade tip of the second stirring blade. The blade tips of the first stirring blade, the second stirring blade and the third stirring blade are connected with iron wires.

[0019] As a preferred technical solution, the lower end of the mixing section is provided with a glue outlet, and a glue dispensing roller is provided at the bottom opening of the glue outlet, with the surface of the glue dispensing roller covered with a brush.

[0020] As a preferred technical solution, the replacement mechanism includes a transfer structure and a placement platform. The placement platform includes a fixed base, a rotating shaft is fixedly installed at the central axis of the fixed base, a U-shaped groove is opened at the center of the rotating shaft, and grooves are symmetrically opened along the diameter on the side of the rotating shaft. A stop block is inserted into the groove, and the stop block is also arranged symmetrically along the diameter and is movable within the groove. A spring is fixedly installed on the end of the stop block near the central axis, and the other end of the spring is fixedly installed on the inner wall of the groove. A through hole is opened on the inner side of the groove, and a pull rope is passed through the through hole. The two symmetrical stop blocks near the central axis are connected and installed by the pull rope.

[0021] As a preferred technical solution, the transfer structure includes a transfer slide rail, a rotating shaft is fixedly installed above the transfer slide rail, and a steering bracket is rotatably installed. A circular chassis is fixedly installed at the other end of the steering bracket. A convex shaft that cooperates with a U-shaped groove is fixedly installed at the center of the lower end of the circular chassis shaft. An annular electromagnet is fixedly installed at the connection between the convex shaft and the circular chassis.

[0022] (III) Beneficial Effects

[0023] The beneficial effects of this invention are as follows:

[0024] (1) The friction pads made by the formula adopted in this invention can achieve a high level of friction coefficient and wear amount, which greatly improves the performance and enhances the reliability and service life of the product compared with the existing formula.

[0025] (2) The guide mechanism designed in this invention can accurately position the glue application and achieve three-axis positioning. Specifically, it can complete efficient and high-precision fully automatic operation without manual intervention.

[0026] (3) The glue-applying mechanism designed in this invention can automatically and accurately mix glue. The blades of its stirring part are set at different heights, and each blade is tied with an iron wire at one end, which increases the stirring area and can further improve the stirring efficiency. Under electronic control, the glue-pushing mechanism can accurately control the amount of glue, ensuring the glue formula and the viscosity after mixing. The glue-dispensing roller and the brush on its surface can make the glue evenly applied to the friction plate, while ensuring timely replenishment of glue, solving the problem of ordinary brushes dipping glue multiple times, and realizing truly fully automatic glue application and coating.

[0027] (4) The electromagnet, stop, spring and pull rope in the replacement mechanism designed in this invention can realize the fully automatic handling of the friction plate and the fixing of the friction plate by the stop. First, the friction plate is attracted by the electromagnet and then transported to the placement table. Through the cooperation of the two and the extension and retraction operation of the stop, the friction plate is pressed. There is no need for manual handling of the friction plate, which greatly improves the efficiency of the glue application process. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2yes Figure 1 Enlarged view of part A;

[0031] Figure 3 This is a schematic diagram of the adhesive application mechanism of the present invention;

[0032] Figure 4 This is a cross-sectional view of the placement platform of the present invention;

[0033] Figure 5 This is a cross-sectional view of the replacement mechanism of the present invention in the engagement state;

[0034] 1-Replacement mechanism; 11-Transfer structure; 111-Transfer slide rail; 112-Pan shaft; 113-Circular chassis; 114-Steering bracket; 115-Ring electromagnet; 12-Placement platform; 121-Fixed base; 122-Rotating shaft; 123-Stop; 124-Spring; 125-Pull rope; 126-Groove; 127-Through hole; 128-U-groove; 2-Glue application mechanism; 21-Glue pushing structure; 2 11-Cavity; 212-Hose; 213-Propulsion Cylinder; 22-Mixing Section; 221-Third Mixing Blade; 222-Second Mixing Blade; 223-First Mixing Blade; 224-Rotating Shaft; 23-Dispensing Port; 24-Dispensing Roller; 241-Brush; 3-Guiding Mechanism; 31-Screw; 32-Slide Rail; 33-First Positioning Plate; 34-Second Positioning Plate; 4-Bracket; 5-Dispensing Controller. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figure 1-5 As shown, a method for preparing friction plates for a heavy-duty truck cooling fan clutch includes the following embodiments:

[0037] Example 1

[0038] A method for preparing friction plates for a heavy-duty truck cooling fan clutch includes the following steps:

[0039] S1: Mixing. Put the materials into a 1200L plow-type mixer for dry mixing. Set the speed to 85r / min, set the flying knife mode, and the mixing time to 20min.

[0040] S2: Pressing, using a hot press, pressure set at 35 MPa, temperature set at 150℃, pressing time at 6 min;

[0041] S3: Heat treatment: Place the pressed friction sheet into a high-temperature oven, set the temperature to 150℃, and heat treatment time to 4 hours.

[0042] S4: Grinding process, where the heat-treated friction pads are placed in a belt grinder for processing;

[0043] S5: Machining, machining the friction plate using a lathe;

[0044] S6: Packaging, packaging the products according to customer requirements.

[0045] Furthermore, the heat treatment section in S3 adopts a segmented heat treatment method.

[0046] Example 2

[0047] A method for preparing friction plates for a heavy-duty truck cooling fan clutch includes the following steps:

[0048] S1: Mixing. Put the materials into a 1200L plow-type mixer for dry mixing. Set the speed to 85r / min, set the flying knife mode, and the mixing time to 40min.

[0049] S2: Pressing, using a hot press, pressure set at 50 MPa, temperature set at 165℃, pressing time at 6 min;

[0050] S3: Heat treatment: Place the pressed friction sheet into a high-temperature oven, set the temperature to 175℃, and heat treatment time to 8 hours.

[0051] S4: Grinding process, where the heat-treated friction pads are placed in a belt grinder for processing;

[0052] S5: Machining, machining the friction plate using a lathe;

[0053] S6: Packaging, packaging the products according to customer requirements.

[0054] Furthermore, the heat treatment section in S3 adopts a segmented heat treatment method.

[0055] Example 3

[0056] A method for preparing friction plates for a heavy-duty truck cooling fan clutch includes the following steps:

[0057] S1: Mixing. Put the materials into a 1200L plow-type mixer for dry mixing. Set the speed to 85r / min, set the flying knife mode, and the mixing time to 60min.

[0058] S2: Pressing, using a hot press, pressure set to 60 MPa, temperature set to 175℃, pressing time 6 min;

[0059] S3: Heat treatment: Place the pressed friction sheet into a high-temperature oven, set the temperature to 200℃, and heat treatment time to 12h.

[0060] S4: Grinding process, where the heat-treated friction pads are placed in a belt grinder for processing;

[0061] S5: Machining, machining the friction plate using a lathe;

[0062] S6: Packaging, packaging the products according to customer requirements.

[0063] Furthermore, the heat treatment section in S3 adopts a segmented heat treatment method.

[0064] To verify the effectiveness of the present invention, the friction plates prepared in Examples 1-3 and existing friction plates were tested on a constant speed friction testing machine and a friction plate service life testing instrument, and the coefficient of friction and wear were measured. The test results are as follows:

[0065]

[0066] like Figure 1-5 As shown, a heavy-duty truck radiator fan clutch friction plate coating device is implemented as follows:

[0067] Please refer to the attached document. Figure 1-2 A heavy-duty truck radiator fan clutch friction plate gluing device includes a support 4, on which a guiding mechanism 3, a gluing mechanism 2, and a replacement mechanism 1 are respectively mounted. A glue dispensing controller 5 is mounted on the top of the support 4 and is pipe-connected to the gluing mechanism 2. The gluing mechanism 2 includes a glue pushing structure 21 and a stirring section 22. The replacement mechanism 1 is located below the gluing mechanism 2. The gluing device has a complete structure and clearly defined functions for each mechanism, enabling fully automated gluing.

[0068] Furthermore, the guide mechanism 3 includes a lead screw 31, with a slide rail 32 at its front end. A first positioning plate 33 is bolted to the front end of the slide rail 32, and a second positioning plate 34 is bolted to the front end of the first positioning plate 33. An adhesive applicator 2 is fixedly installed at the front end of the second positioning plate 34. The guide mechanism enables precise positioning and adhesive applicator application, and achieves three-axis positioning. Specifically, it can perform highly efficient and high-precision fully automatic operation without manual intervention.

[0069] Please refer to the attached document. Figure 3 The rubber tube 212 has its forward end of the propulsion cylinder 213 placed inside the rubber tube 212. The rubber tube 212 is further divided into left and right sections. The rubber pushing structure 21 includes a pair of propulsion cylinders 213 and two cavities 211. The cavities 211 are respectively filled with AB rubber, and a stirring part 22 is installed between the left and right cavities of the cavities 211.

[0070] Furthermore, the stirring unit 22 includes a rotating shaft 224, with a rotating motor fixedly mounted at one end of the rotating shaft 224. A first stirring blade 223, a second stirring blade 222, and a third stirring blade 221 are fixedly mounted on the rotating shaft 224. The tip of the first stirring blade 223 is lower than the tip of the second stirring blade 222, and the tip of the third stirring blade 221 is level with the tip of the first stirring blade 223, both lower than the tip of the second stirring blade 222. Iron wires are connected to the tips of the first stirring blade 223, the second stirring blade 222, and the third stirring blade 221. The blades of the stirring unit 22 are arranged at different heights, and each blade has an iron wire attached to one end, increasing the stirring area and further improving stirring efficiency. The adhesive pushing structure 21, under electronic control, can precisely control the amount of adhesive, ensuring the correct formulation and viscosity after mixing.

[0071] Furthermore, the lower end of the mixing unit 22 is provided with a glue outlet 23, and a glue dispensing roller 24 is provided at the bottom opening of the glue outlet 23. The surface of the glue dispensing roller 24 is covered with a brush 241. The glue dispensing roller 24 and the brush 241 on its surface can make the glue evenly applied to the friction plate, while ensuring timely replenishment of glue, solving the problem of ordinary brushes repeatedly dipping in glue, and realizing truly fully automatic glue application and coating.

[0072] Please refer to the attached document. Figure 4-5 Furthermore, the replacement mechanism 1 includes a transfer structure 11 and a placement platform 12. The placement platform 12 includes a fixed base 121, a rotating shaft 122 fixedly mounted at the central axis of the fixed base 121, a U-shaped groove 128 formed at the center of the rotating shaft 122, and grooves 126 symmetrically formed along the diameter on the side of the rotating shaft 122. A stop block 123 is inserted inside the groove 126, and the stop block 123 is also symmetrically arranged along the diameter and movable within the groove 126. A spring 124 is fixedly mounted near the central axis end of the stop block 123, and the other end of the spring 124 is fixedly mounted on the inner wall of the groove 126. A through hole 127 is formed inside the groove 126, and a pull rope 125 passes through the through hole 127. The two symmetrical stop blocks 123 near the central axis end are connected and installed by the pull rope 125. The extension and retraction of the spring, pull rope, and stop block can press the friction plate tightly, eliminating the need for manual positioning of the friction plate and ensuring stability during adhesive application.

[0073] Furthermore, the transfer structure 11 includes a transfer slide rail 111, a rotating shaft fixedly mounted above the transfer slide rail 111, and a rotatable steering bracket 114 rotatably mounted thereon. A circular base 113 is fixedly mounted at the other end of the steering bracket 114. A convex shaft 112 that mates with a U-shaped groove 128 is fixedly mounted at the center of the lower end of the circular base 113. A ring electromagnet 115 is fixedly mounted at the connection between the convex shaft 112 and the circular base 113. Under the action of the electromagnet, fully automatic handling can be achieved, truly eliminating the need for manual operation.

[0074] The working principle of this invention is as follows: First, AB glue is injected into the glue coating mechanism 2. Through the glue dispensing controller 5, the push cylinder 213 pushes the corresponding proportion of AB glue into the cavity 211 of the glue tube 212. The rotary motor is started, driving the stirring part 22 to rotate, so that the first stirring blade 223, the second stirring blade 222 and the third stirring blade 221 rotate simultaneously. Since there is a height difference between each blade and the blades are connected by iron wire, the stirring efficiency can be effectively improved, so that the AB glue is fully mixed. The mixed glue is immersed in the glue dispensing roller 24 through the glue dispensing port 23. The glue dispensing roller 24 is equipped with a brush 241, which can make the glue adhere evenly and easier to apply.

[0075] The glue application mechanism 2 is positioned by the guide mechanism 3. Using the first and second positioning plates, the glue application mechanism 2 is adjusted to be directly above the friction plate. Then, the glue application mechanism 2 moves up and down via the lead screw 31 and slide rail 32. Using the guide mechanism 3 for positioning accurately determines the glue application position on the friction plate, facilitating precise glue application by the glue dispensing roller 24.

[0076] Furthermore, the replacement mechanism 1 of this device consists of a transfer structure 11 and a placement platform 12. First, the annular electromagnet 115 in the transfer structure 11 attracts the friction plate. Then, the transfer slide rail 111 and the steering bracket 114 drive the circular chassis 113 and the cam shaft 112 to a coaxial position above the placement platform 12. The transfer slide rail 111 moves downwards, the cam shaft 112 engages with the U-shaped groove 128, and the cam shaft 112 presses the pull rope 125. The pull rope 125 drives the stop block 123 to move in the axial direction, simultaneously pressing the spring 124. The stop block 123 embeds into the groove 126, disconnecting the annular electromagnet 115. The friction plate falls onto the placement platform 12, the transfer structure 11 rises, and the stop block 123 pops outwards under the action of the spring 124, pressing against the friction plate. The glue dispensing roller 24... Under the control of the guide mechanism 3, the friction pad is precisely coated with adhesive. After the friction pad rotates once and the adhesive covers the friction pad, the adhesive roller 24 is lifted. The transfer structure 11 then drives the circular base 113 and the cam shaft 112 to the coaxial position above the placement table 12. The transfer slide rail 111 moves downward, and the cam shaft 112 cooperates with the U-shaped groove 128 to suck the coated friction pad to the circular base 113, and then transfer it to the next production line for the next step of installation.

[0077] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. A heavy-duty truck cooling fan clutch friction plate adhesive application device, comprising a bracket (4), wherein the bracket (4) is respectively equipped with a guide mechanism (3), an adhesive application mechanism (2), and a replacement mechanism (1), characterized in that, The top of the bracket (4) is equipped with a glue dispensing controller (5), which is connected to the glue coating mechanism (2) via a pipe. The glue coating mechanism (2) includes a glue pushing structure (21) and a stirring part (22). A replacement mechanism (1) is provided below the glue coating mechanism (2). The adhesive pushing structure (21) includes a pair of propulsion cylinders (213) and an adhesive tube (212). The forward end of the propulsion cylinder (213) is placed inside the adhesive tube (212). The adhesive tube (212) is divided into two chambers (211) on the left and right sides. AB adhesive is filled in each chamber (211), and a stirring part (22) is installed between the left and right chambers (211). The stirring part (22) includes a rotating shaft (224). A rotating motor is fixedly installed at one end of the rotating shaft (224). 24) A first stirring blade (223), a second stirring blade (222) and a third stirring blade (221) are fixedly installed on the blade. The blade end of the first stirring blade (223) is lower than the blade end of the second stirring blade (222). The blade end of the third stirring blade (221) is level with the blade end of the first stirring blade (223) and is lower than the blade end of the second stirring blade (222). The blade tips of the first stirring blade (223), the second stirring blade (222) and the third stirring blade (221) are connected with iron wires.

2. The heavy-duty truck cooling fan clutch friction plate coating equipment according to claim 1, characterized in that: The guiding mechanism (3) includes a lead screw (31), a slide rail (32) is provided at the front end of the lead screw (31), a first positioning plate (33) is bolted to the front end of the slide rail (32), a second positioning plate (34) is bolted to the front end of the first positioning plate (33), and an adhesive applicator (2) is bolted to the front end of the second positioning plate (34).

3. The heavy-duty truck cooling fan clutch friction plate coating equipment according to claim 1, characterized in that: The stirring part (22) has a glue outlet (23) at its lower end. A glue dispensing roller (24) is provided at the bottom opening of the glue outlet (23). The surface of the glue dispensing roller (24) is covered with a brush (241).

4. The heavy-duty truck cooling fan clutch friction plate coating equipment according to claim 1, characterized in that: The replacement mechanism (1) includes a transfer structure (11) and a placement platform (12); the placement platform (12) includes a fixed base (121), a rotating shaft (122) is fixedly installed at the central axis of the fixed base (121), a U-shaped groove (128) is opened at the center of the rotating shaft (122), and grooves (126) are symmetrically opened along the diameter on the side of the rotating shaft (122). A stop block (123) is inserted inside the groove (126), and the stop block (123) is also arranged symmetrically along the diameter and can move in the groove (126). A spring (124) is fixedly installed at the end of the stop block (123) near the central axis, and the other end of the spring (124) is fixedly installed on the inner wall of the groove (126). A through hole (127) is opened on the inner side of the groove (126), and a pull rope (125) is passed through the through hole (127). The two symmetrical stop blocks (123) near the central axis are connected and installed by the pull rope (125).

5. The heavy-duty truck cooling fan clutch friction plate coating equipment according to claim 4, characterized in that: The transfer structure (11) includes a transfer slide rail (111), a rotating shaft is fixedly installed above the transfer slide rail (111), and a steering bracket (114) is rotatably installed. A circular chassis (113) is fixedly installed at the other end of the steering bracket (114). A convex shaft (112) that cooperates with a U-shaped groove (128) is fixedly installed at the center of the lower end shaft of the circular chassis (113). A ring electromagnet (115) is fixedly installed at the connection between the convex shaft (112) and the circular chassis (113).

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