Diaphragm spring, tempering process of diaphragm spring, clutch pressure plate assembly and assembling method of clutch pressure plate assembly

Abstract

The invention provides a diaphragm spring and a tempering process thereof, a clutch pressure plate assembly and an assembling method thereof, and the tempering process of the diaphragm spring comprises the following steps: S1, establishing a diaphragm spring tempering process production line to meet compliance operation; s2, material supplies needed by the diaphragm spring tempering process are laid and prepared, and the material supplies comprise a starting switch, temperature detection equipment and timing equipment; and S3, the tempering process is started through a starting switch, the heat preservation temperature is controlled to range from 200 DEG C to 230 DEG C through temperature detection equipment and timing equipment, and the heat preservation time ranges from 100 min to 130 min till tempering is finished. The tempering process and the diaphragm spring manufactured through the tempering process have the following technical effects that the material thickness does not need to be increased, the problem that in the prior art, the material thickness needs to be increased is solved, meanwhile, production efficiency is improved, and cost is reduced; and the operation is simple and convenient, and the use is flexible.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts and their derivative industries, and in particular to a diaphragm spring and its tempering process, a clutch pressure plate assembly and its assembly method. Background Art

[0002] At present, with the development of automobile AMT gearbox manufacturing technology, AMT clutch is also widely used in light trucks. Its advantages are that it does not require a clutch pedal, automatically changes gears, is easy to operate, and is very comfortable.

[0003] However, due to the limitations of the current clutch pressure plate assembly manufacturing, along with the market's gradual improvement in product quality requirements, the existing pressure plate assembly's clamping force attenuation and large separation force difference have seriously affected the performance and life of the vehicle. To this end, manufacturers need to increase the valley value of the diaphragm spring, a key component of the pressure plate assembly, to improve the peak-to-valley ratio. Currently, although the existing process adjustments can achieve the target value by increasing the material thickness and reducing the cone angle, it has led to the following problems:

[0004] 1. Increasing material thickness means increasing production costs;

[0005] 2. To reduce the cone angle, the press quenching mold needs to be repaired. Due to the high hardness of the mold surface, the service life of the turning tool will be greatly reduced when it is idle;

[0006] 3. Materials need to be customized, and the cycle time is long, which will affect production efficiency.

[0007] Based on this, the present invention proposes a new diaphragm spring tempering process and obtains a corresponding diaphragm spring and clutch pressure plate assembly. Summary of the invention

[0008] Based on the above description, the present invention provides a diaphragm spring and its tempering process, a clutch pressure plate assembly and its assembly method. The diaphragm spring prepared by the tempering process can greatly improve production efficiency while reducing costs, and is also easy to operate and flexible to use.

[0009] The technical solution of the present invention to solve the above technical problems is as follows:

[0010] In a first aspect, the present invention provides a diaphragm spring tempering process, in which the traditional tempering process parameters are changed during the tempering process after the traditional hot forming quenching process is completed; the specific process steps are as follows:

[0011] S1: Establish a diaphragm spring tempering process production line to meet compliance operations;

[0012] S2: Laying out and preparing materials and supplies required for the diaphragm spring tempering process, wherein the materials and supplies include a start switch, a temperature detection device, and a timing device;

[0013] S3: Start the tempering process through the start switch, and control the insulation temperature to 200-230° C. and the insulation time to 100-130 minutes through the temperature detection equipment and the timing equipment until the tempering is completed.

[0014] Based on the above technical solution, the present invention can also be improved as follows.

[0015] Furthermore, in step S3, the temperature detection equipment and the timing equipment are used to control the insulation temperature to be 220-230° C. and the insulation time to be 120-130 minutes.

[0016] Furthermore, in step S3, the temperature detection equipment and the timing equipment are used to control the insulation temperature to be 220° C. and the insulation time to be 120 minutes.

[0017] In a second aspect, the present invention provides a diaphragm spring, wherein the diaphragm spring is prepared by the diaphragm spring tempering process described in the first aspect.

[0018] In a third aspect, the present invention provides a clutch pressure plate assembly, comprising: a pressure plate, a pressure cover, and a diaphragm spring as described in the second aspect;

[0019] The pressure plate is coaxially connected to the pressure cover;

[0020] The diaphragm spring is coaxially arranged between the pressure cover and the pressure plate.

[0021] Based on the above technical solution, the present invention can also be improved as follows.

[0022] Furthermore, the pressure plate and the pressure cover are detachably connected.

[0023] Furthermore, two ends of the diaphragm spring are respectively in contact with the pressure cover and the pressure plate.

[0024] In a fourth aspect, the present invention provides an assembly method of the clutch pressure plate assembly according to the third aspect, comprising the following steps:

[0025] S1: Rivet the gland and the diaphragm spring;

[0026] S2: riveting the gland and the transmission sheet;

[0027] S3: Riveting the pressure plate and the pressure cover to obtain a pressure plate assembly.

[0028] Based on the above technical solution, the present invention can also be improved as follows.

[0029] Furthermore, after step S3, the method further includes:

[0030] S4: Performing dynamic balancing test on the pressure plate assembly;

[0031] S5: Performing a strong pressure calibration test on the pressure plate assembly;

[0032] S6: Performing a cover assembly performance test on the pressure plate assembly.

[0033] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0034] The diaphragm spring and its tempering process, clutch pressure plate assembly and its assembly method provided by the present invention improve the diaphragm spring, a key component on the pressure plate assembly. In the tempering process after the traditional separation finger high-frequency quenching process is completed, the insulation temperature is increased by 50°C and the insulation time is extended by 60 minutes, that is, the original 170°C in the tempering process in the prior art is increased to 200-230°C, preferably 220°C; the original 60 minutes in the tempering process in the prior art is increased to 100-130 minutes, preferably 120 minutes.

[0035] The principle of the tempering process provided by the present invention is based on the difference in elastic modulus of the diaphragm spring at different temperatures. By improving the insulation temperature in the low-temperature tempering process from 170°C to 220°C, and the insulation time from 60 minutes to 120 minutes, the extension of the insulation time of the diaphragm spring and the increase in temperature produce a superimposed effect, which can reduce the stiffness of the diaphragm spring, thereby reducing the peak value and increasing the valley value.

[0036] Compared with the existing method of increasing the material thickness and reducing the cone angle to increase the valley value of the diaphragm spring and improve the peak-to-valley ratio, this invention achieves the target value by increasing the tempering temperature by 50°C and extending the insulation time by 60 minutes. The process is simple, easy to operate, economical and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic flow chart of the diaphragm spring tempering process provided in the first embodiment of the present invention.

[0038] Figure 2 A comparison result diagram of performance verification comparison between the embodiment provided in the present invention and the comparative example. DETAILED DESCRIPTION

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] The following is combined with Figure 1 and Figure 2 The embodiments of the present invention are further described in detail with examples. The following examples are used to illustrate the present invention but cannot be used to limit the scope of the present invention.

[0042] Embodiment 1

[0043] This embodiment provides a diaphragm spring tempering process, which changes the traditional tempering process parameters in the tempering process after the traditional hot forming quenching process is completed;

[0044] like Figure 1 As shown, the specific process steps are as follows:

[0045] Step S1: Establish a diaphragm spring tempering process production line to meet compliance operations;

[0046] Step S2: laying out and preparing materials and supplies required for the diaphragm spring tempering process, wherein the materials and supplies include a start switch, a temperature detection device, and a timing device;

[0047] Step S3: Start the tempering process by starting the switch, and control the insulation temperature to 200-230° C. and the insulation time to 100-130 minutes by the temperature detection equipment and the timing equipment until the tempering is completed.

[0048] Among them, in an optional example, the insulation temperature is controlled to be 220-230°C and the insulation time is 120-130 minutes by temperature detection equipment and timing equipment.

[0049] In the optimal example, the holding temperature is controlled to be 220° C. and the holding time is controlled to be 120 minutes by the temperature detection equipment and the timing equipment.

[0050] The technical solution adopted in this embodiment is to improve the tempering process of the diaphragm spring, a key part of the pressure plate assembly, that is, to increase the holding temperature by 50°C and extend the holding time by 60 minutes in the tempering process after the high-frequency quenching process of the separation finger. The holding temperature is increased by 50°C from the original 170°C (existing technology) to 220°C; the holding time is extended by 60 minutes from the original 60 minutes (existing technology) to 120 minutes.

[0051] The tempering temperature is raised to 220℃, firstly, the high-frequency quenching hardness of the separation finger does not change. If it is too much higher than 220℃, the high-frequency hardness will be reduced, and the risk of failure will increase. Secondly, if it is too much lower than 220℃, the valley value of the diaphragm spring will not increase significantly, and the improvement effect of the separation force difference will be poor. Therefore, the extension of the diaphragm spring insulation time and the increase in temperature can produce a superposition effect.

[0052] The diaphragm spring obtained by the tempering process of this embodiment can not only increase the valley value of the diaphragm spring and improve the peak-to-valley ratio, but also effectively solve the problem of attenuation of the clamping force and large difference in separation force of the pressure plate assembly of a light truck. Through this method, the attenuation of the clamping force can be less than 10%, and the difference in separation force can be less than 10% of the separation peak value, which can achieve the effect of improving the performance and extending the service life, reducing costs and improving production efficiency.

[0053] In addition, the process has the advantages of simple process, convenient operation, good economy and strong practicality.

[0054] In summary, compared with the prior art, this embodiment can achieve the following technical effects:

[0055] 1. No need to increase the material thickness, which solves the problem of increasing the material thickness in the existing technology, while improving production efficiency and reducing costs;

[0056] 2. No need to lower the cone angle, which solves the problem of needing to repair the mold and adjust the angle in the prior art. It is flexible to choose and easy to operate.

[0057] Embodiment 2

[0058] This embodiment provides a clutch pressure plate assembly, which includes: a pressure plate, a pressure cover and a diaphragm spring as in the first embodiment.

[0059] The pressure plate is coaxially connected to the pressure cover; the pressure plate and the pressure cover are detachably connected.

[0060] The diaphragm spring is coaxially arranged between the pressure cover and the pressure plate.

[0061] Specifically, two ends of the diaphragm spring abut against the pressure cover and the pressure plate respectively.

[0062] Correspondingly, the assembly method of the clutch pressure plate assembly includes the following steps:

[0063] Step S1: riveting the gland and the diaphragm spring;

[0064] Step S2: riveting the gland and the transmission sheet;

[0065] Step S3: riveting the pressure plate and the pressure cover to obtain a pressure plate assembly.

[0066] Step S4: Perform dynamic balancing test on the pressure plate assembly;

[0067] Step S5: Performing a strong pressure calibration test on the pressure plate assembly;

[0068] Step S6: Performing a performance test on the cover assembly of the pressure plate assembly.

[0069] Finally, after the test is completed and qualified, it will be inspected, cleaned and packaged.

[0070] Since the diaphragm spring used in this embodiment is manufactured by Embodiment 1, the beneficial effects of the diaphragm spring and its tempering process in Embodiment 1 are also applicable to the clutch pressure plate assembly and its assembly method. For its beneficial effects, reference may be made to the effect description of the above-mentioned Embodiment 1 and will not be repeated here.

[0071] In addition, in order to further illustrate the technical effect of the present invention, a series of verification experiments were conducted, that is, the performance of the diaphragm spring and the clutch pressure plate assembly obtained according to the prior art comparative example (insulation temperature 170°C, insulation time 60 minutes) and the embodiment of the present invention (insulation temperature 220°C, insulation time 120 minutes) were verified. The verification results are as follows: Figure 2 shown.

[0072] It should be noted that; Figure 2 The relevant data of Example 1 in the figure are the data for verifying the diaphragm spring obtained in Example 1 at a holding temperature of 220°C and a holding time of 120 minutes at an experimental temperature of 250°C. It can be seen that the joint height and the working point pressing force in the comparative example are both unqualified, resulting in the comprehensive performance of the obtained diaphragm spring being judged as unqualified.

[0073] In addition, it has been verified by examples that before improvement (comparative example), the peak value of the diaphragm spring is 2922N, the valley value is 2601N, and the peak-to-valley ratio is 1.123; after improvement (this embodiment 1), the peak value of the diaphragm spring is 2961N, the valley value is 2740N, and the peak-to-valley ratio is 1.081; after improvement (this embodiment 1), the diaphragm spring separation force difference is 221N, and the separation peak value is 2740N, and the ratio is 221 / 2740=8.06%, which is less than 10%.

[0074] Furthermore, in further research, it can be seen that the valley value of the diaphragm spring provided in the embodiment of the present invention can be improved, the peak-to-valley ratio can be reduced, the clamping force of the pressure plate assembly is attenuated at 200-250°C, and the separation force difference is less than the separation peak value, which can fully achieve the target values ​​of assembly clamping force ≤10% and separation force difference less than 10% of the separation peak value.

[0075] In the description of this specification, the description with reference to the terms "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A diaphragm spring tempering process, characterized in that: After the traditional hot forming quenching process is completed, the traditional tempering process parameters are changed in the tempering process; the specific process steps are as follows: S1: Establish a diaphragm spring tempering process production line to meet compliance operations; S2: Laying out and preparing materials and supplies required for the diaphragm spring tempering process, wherein the materials and supplies include a start switch, a temperature detection device, and a timing device; S3: Start the tempering process through the start switch, and control the insulation temperature to 200-230° C. and the insulation time to 100-130 minutes through the temperature detection equipment and the timing equipment until the tempering is completed.

2. The diaphragm spring tempering process according to claim 1, characterized in that: In step S3, the temperature detection equipment and the timing equipment are used to control the insulation temperature to be 220-230° C. and the insulation time to be 120-130 minutes.

3. The diaphragm spring tempering process according to claim 2, characterized in that: In step S3, the temperature detection equipment and the timing equipment are used to control the insulation temperature to be 220° C. and the insulation time to be 120 minutes.

4. A diaphragm spring, characterized in that: The diaphragm spring is prepared by the diaphragm spring tempering process described in any one of claims 1 to 3.

5. A clutch pressure plate assembly, characterized in that: include: A pressure plate, a pressure cover and a diaphragm spring as claimed in claim 4; The pressure plate is coaxially connected to the pressure cover; The diaphragm spring is coaxially arranged between the pressure cover and the pressure plate.

6. The clutch pressure plate assembly according to claim 5, characterized in that: The pressure plate is detachably connected to the pressure cover.

7. The clutch pressure plate assembly according to claim 5, characterized in that: Two ends of the diaphragm spring are respectively in contact with the pressure cover and the pressure plate.

8. An assembly method of a clutch pressure plate assembly according to any one of claims 5 to 7, characterized in that: The steps include: S1: Rivet the gland and the diaphragm spring; S2: riveting the gland and the transmission sheet; S3: Riveting the pressure plate and the pressure cover to obtain a pressure plate assembly.

9. The assembly method of the clutch pressure plate assembly according to claim 8, characterized in that: After step S3, the method further includes: S4: Performing dynamic balancing test on the pressure plate assembly; S5: Performing a strong pressure calibration test on the pressure plate assembly; S6: Performing a cover assembly performance test on the pressure plate assembly.

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