JP2018115750A - Friction material heating device and heating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a friction surface of a friction material to be appropriately heated for each workpiece.SOLUTION: A friction material heating device heats a surface of a friction material for a brake, and comprises heating means for heating the surface of the friction material, a friction material support part for forming a part on which the friction material is supported when being heated by the heating means, and a weighing part for measuring a weight change of the friction material supported on the friction material support part.SELECTED DRAWING: Figure 1

Description

  The present application discloses a heating device and a heating method for a friction material.

  Brakes used in vehicles and various other machines are usually equipped with friction materials. Since the friction material is a member that converts kinetic energy into thermal energy, the friction surface becomes hot when braking continuously for a plurality of times, and desired effectiveness performance is exhibited. Therefore, in the friction material production line, as a measure against initial fading, a treatment for heating the friction surface in advance is performed before shipment (see, for example, Patent Document 1-2).

JP 2001-50671 A JP-A-8-177914

  Conditions such as temperature and time for heating the friction surface of the friction material are different for each type of product. Therefore, in a production line that handles various types of friction materials, management of the heating temperature and the heating time according to the type of friction material to be heated is performed. As a management method of the heating temperature and the heating time, for example, there is a method of adjusting the heating time according to the correlation between the type of friction material obtained by experimentally heating the friction material sample and the appropriate heating time. . However, since this method is not a method for directly checking the state of the heated friction surface, it is not possible to individually measure each workpiece in a conveying state where a plurality of workpieces are arranged on a conveyor or the like, and the friction of the friction material to be shipped It is difficult to accurately grasp that the surface is properly heated.

  Then, this invention makes it a solution subject to enable the friction surface of a friction material to be heated appropriately for every workpiece | work.

  In order to solve the above problems, in the present invention, heating is performed while measuring the change in the weight of the friction material.

  More specifically, the present invention relates to a friction material heating device for heating the surface of a friction material for a brake, the heating means for heating the surface of the friction material, and the friction material being supported when heated by the heating means. A friction material support portion that forms a portion to be measured, and a measuring portion that measures a change in weight of the friction material supported by the friction material support portion.

  According to said heating apparatus, the weight change of the friction material supported by the friction material support part can be measured. Therefore, if the weight change of the friction material is monitored during the heating of the friction material, the degree of baking of the friction material can be quantitatively grasped for each workpiece based on the weight change of the friction material accompanying the heating. If the degree of baking of the friction material can be grasped quantitatively for each workpiece, the friction surface of the friction material can be appropriately heated for each workpiece.

  The friction material support portion may have a support column that supports the friction material at the upper end, and the measuring unit may measure a change in weight of the friction material based on a load received from the support column. If the friction material support portion is configured in this way, the influence of heat received by the measuring portion can be suppressed.

  The heating device may further include a control unit that stops heating the friction material when the weighing unit detects that the weight change of the friction material has reached a predetermined amount. Examples of the method for stopping the heating of the friction material include at least one of a method for stopping the heating unit, a separation of the friction material from the heating unit, and a blowing of air to the friction material. If such a control unit is provided, the heating to the friction material can be automatically stopped, so that artificial heating failure can be prevented.

  The present invention can also be understood from a method aspect. For example, the present invention is a friction material heating method for heating the surface of a friction material for a brake, monitoring the change in weight of the friction material in a state where the surface is baked by the heating means, and based on the change in weight, The heating of the friction material by the heating means may be stopped.

  If it is this invention, it will become possible to heat the friction surface of a friction material appropriately for every workpiece | work.

FIG. 1 is a schematic configuration diagram of a friction material heating apparatus. FIG. 2 is a view showing a mechanism for moving the friction material. FIG. 3 is a flowchart showing the operation content realized in the heating apparatus. FIG. 4 is a diagram showing the operation contents of the taking in / out device and the lifting device. FIG. 5 is a diagram showing a change in the weight indication value observed by the weighing device when the friction material is burned by the heater. FIG. 6 is a diagram illustrating a modified example of the operation content of each device of the heating device.

  Hereinafter, embodiments of the present invention will be described. The embodiment described below exemplifies one aspect of the present invention, and does not limit the technical scope of the present invention to the following aspect.

  FIG. 1 is a schematic configuration diagram of a friction material heating apparatus. The heating device 1 is a device that heats the friction surface of the friction material of the disc brake, and is a device that is used in a so-called surface baking process performed in the manufacture of the friction material. As shown in FIG. 1, the heating device 1 includes a heating furnace 2, a heater 3 (which is an example of “heating means” in the present application), a support column 4, a weighing device 6, and a control device 8.

  The heating furnace 2 is a furnace in which a space for heating the friction surface of the friction material 9 is formed. The heating furnace 2 can prevent scattering of smoke and odors and has a size that can accommodate the friction material 9. The heating furnace 2 has an entrance / exit 7 for taking in and out the friction material 9 on a side surface. Therefore, the friction material 9 can be taken in and out from the side of the heating furnace 2. Further, a hole 5 through which the support column 4 passes is provided at the bottom of the heating furnace 2.

  The heater 3 is fixed to the upper part of the internal space of the heating furnace 2. The heater 3 is a heater that heats the friction material 9 disposed below the heater 3. The heater 3 may be any heating means that can bring the friction surface of the friction material 9 to a predetermined temperature. For example, the heater 3 may be a carbon heater, a flame radiating burner, a heating wire, or other various types. Heating means can be applied.

The support column 4 is a rod-like member that supports the friction material 9 by a support upper end 4 </ b> S (an example of a “friction material support portion” in the present application), and a lower end thereof is fixed to the measuring device 6. The support column 4 is inserted into the hole 5 of the heating furnace 2. Therefore, when the friction material 9 placed on the jig 10 is placed on the upper end 4S of the column,
The weights of the jig 10 and the friction material 9 are added to the weighing device 6. Since the support | pillar 4 is a rod-shaped body which has a suitable length, it has the function to suppress and protect the calorie | heat amount of the heater 3 transmitted to the weighing | measuring apparatus 6. FIG.

  The weighing device 6 is a device that measures a change in the weight of the friction material 9 placed on the upper end 4S of the column. The weighing device 6 can measure a change in the weight of the friction material 9 due to carbonization or evaporation of moisture due to heating of the friction material 9. The weighing device 6 may be any weighing device capable of measuring the weight change of the friction material 9, and for example, a load cell type, an electromagnetic type, a mechanical type, and other various types of weighing devices are applied. Is possible.

  The control device 8 is a control device that controls the heater 3 based on the measurement value of the weighing device 6. In addition, when the operator of the heating apparatus 1 controls the heater 3 manually, the control apparatus 8 can be omitted.

  FIG. 2 is a view showing a mechanism for moving the friction material 9. The heating device 1 includes a loading / unloading device 11 that moves the friction material 9 in and out of the heating furnace 2 through the doorway 7 and a lifting device 12 that moves the weighing device 6 to which the support column 4 is fixed up and down. The taking-out apparatus 11 has rails 11a and 11b that can slide the jig 10 in the lateral direction. In addition, the loading / unloading device 11 includes a driving mechanism (not shown) that moves the jig 10 mounted on the rails 11a and 11b along the longitudinal direction of the rails 11a and 11b. The lifting device 12 includes a cylinder 12b for lifting and lowering the weighing device 6, a piston 12c fitted to the cylinder 12b, and a plate 12d fixed to the upper end of the piston 12c. The weighing device 6 is fixed to the plate 12d. When the lifting device 12 is operated, the piston 12c is pushed up and the plate 12d is raised, or the piston 12c is lowered and the plate 12d is lowered. The loading / unloading device 11 and the lifting / lowering device 12 may be controlled by the control device 8 or may be controlled by another control device.

  FIG. 3 is a flowchart showing the operation content realized in the heating apparatus 1. Hereinafter, the operation content realized in the heating apparatus 1 will be described. The operation content of the heating device 1 described below is automatically realized by the control device 8 or another control device. Furthermore, part or all of the operation content may be realized manually.

  In the heating device 1, firstly, an operation for transferring the friction material 9 to the inside of the heating furnace 2 while being placed on the jig 10 is performed by the loading / unloading device 11 (S <b> 101). Next, when the lifting / lowering device 12 operates slightly to raise the weighing device 6 and the jig 10 on which the friction material 9 is placed is supported by the support column 4, the reference point of the measurement value output by the weighing device 6 Is confirmed (S102). The confirmation of the reference point may be a so-called zero point adjustment or may be a simple measurement value recording. After the reference point of the measurement value output from the weighing device 6 is confirmed, heating of the friction material 9 is started (S103). That is, the heater 3 is turned on, the lifting device 12 is operated, the weighing device 6 is raised, and the friction material 9 is moved to the vicinity of the heater 3. When the friction material 9 is disposed in the vicinity of the heater 3 with the heater 3 turned on, the friction surface of the friction material 9 starts to burn. When the friction surface of the friction material 9 starts to burn, carbonization or evaporation of moisture by heating is performed on the friction surface of the friction material 9, and the mass of the friction material 9 is reduced. When the mass of the friction material 9 decreases, the measured value of the weight of the friction material 9 measured by the weighing device 6 decreases (S104). When the weight change of the friction material 9 reaches a predetermined amount, heating of the friction material 9 is stopped (S105). That is, the heater 3 is turned off, the elevating device 12 is operated, the measuring device 6 is lowered, and the jig 10 on which the friction material 9 is placed is placed on the rails 11a and 11b again. The predetermined amount is a burn-out amount of the friction material 9 that is set so that the friction surface of the friction material 9 can exhibit the designed brake performance from the beginning of use. For example, the predetermined amount is appropriately set in advance for each product. . After the heating of the friction material 9 is stopped, an operation for transferring the friction material 9 to the outside of the heating furnace 2 while being placed on the jig 10 is performed by the loading / unloading device 11 (S106).

  FIG. 4 is a diagram showing the operation contents of the taking in / out device 11 and the lifting device 12. In step S <b> 101 described above, as shown in FIG. 4A, an operation for transferring the friction material 9 to the inside of the heating furnace 2 while being placed on the jig 10 is performed by the loading / unloading device 11. Further, in the above-described step S102, the jig 10 on which the friction material 9 is placed is supported by the support column 4 by slightly raising the measuring device 6. Further, in step S104 described above, as shown in FIG. 4C, the lifting device 12 performs an operation in which the weighing device 6 moves up and the friction material 9 moves to the vicinity of the heater 3.

  FIG. 5 is a diagram illustrating a change in the weight indication value observed by the weighing device 6 when the friction material 9 is burned by the heater 3. When heating of the friction material 9 is started, the friction surface of the friction material 9 starts to burn. When the friction surface of the friction material 9 starts to burn, carbonization or moisture evaporation due to heating is performed on the friction surface of the friction material 9, so that the mass of the friction material 9 is reduced. When the mass of the friction material 9 is lowered, as shown in FIG. 5, the measured value of the weight of the friction material 9 measured by the measuring device 6 is decreased. Even after the amount of burn-out of the friction material 9 has reached the range of a predetermined appropriate control width and the heating of the friction material 9 is stopped, the decrease in the weight of the friction material 9 is due to the self-combustion of the friction material 9 and moisture due to residual heat. It may continue for a while due to volatilization. Therefore, for example, when it is appropriate to reduce the weight of the friction material 9 due to the amount of burning loss, the friction material 9 is taken into the air around the heating furnace 2 by taking out the friction material 9 by the loading / unloading device 11 and other transport robots. It is preferable to cool by exposure to quickly stop or suppress a decrease in the weight of the friction material 9 due to self-combustion or residual heat.

  In FIG. 5, after the start of heating, the weight of the friction material 9 decreases without increasing. However, for example, when the heater 3 is a gas burner, the friction material 9 receives the pressure of the flame, so that after the heating is started, there is a tendency that the weight of the friction material 9 once increases and then decreases.

  If the heating device 1 of the above-described embodiment is used, the degree of baking of the friction surface of the friction material 9 can be quantitatively grasped based on the weight of the friction material 9, so that the specified heating time is set empirically. The friction surface can be properly baked as compared with the case of baking along. Therefore, for example, defective heating due to various factors such as change in ambient temperature and deterioration of the heater 3 can be suppressed, and the yield can be improved. Moreover, if the heating apparatus 1 of the said embodiment is used, the baking degree of the friction surface of the friction material 9 can be grasped | ascertained for every workpiece | work of the friction material 9. FIG. If the degree of baking of the friction surface of the friction material 9 can be grasped for each workpiece of the friction material 9, appropriate heating can be realized for each workpiece, and therefore, it can be handled for each product type. Here, each product type refers to the difference in the area of the lining portion, the thickness, and the characteristics of the materials constituting the lining. If it is possible to cope with each product type, for example, it is advantageous when the heating device 1 is used in a line for multi-product and small-quantity production. It is also effective for individual quality control.

  In the above embodiment, one friction material 9 is accommodated in the heating furnace 2, but a plurality of friction materials 9 may be accommodated in the heating furnace 2. In this case, a plurality of weighing devices 6 may be provided for one heating furnace 2.

  Moreover, in the said embodiment, although the friction material 9 was supported by the rod-shaped support | pillar 4, if there is no trouble by the heat | fever of the heater 3 in the measuring device 6, the friction material 9 is a member of forms other than the rod-shaped support | pillar 4 You may make it mount on the weighing | measuring apparatus 6 via.

  In the above embodiment, the heater 3 is turned off as a means for stopping the heating of the friction material 9. However, the friction material 9 is separated from the heater 3 while the heater 3 is turned on. The heating may be stopped, the heating may be substantially stopped by blowing air on the friction material 9, or these methods may be combined.

Further, in the above embodiment, the friction material 9 is placed on the upper end of the rod-shaped support 4. However, the friction material 9 may be held on the upper end of the support 4, for example. Moreover, in the said embodiment, although the friction surface of the friction material 9 was heated in the state which faced up, the friction material 9 may be heated in the state where the friction surface is horizontal or downward, for example. In this case, the positional relationship between the friction material 9 and the heater 3 is not a form in which the friction material 9 is disposed below the heater 3 as in the above-described embodiment, but the vertical relationship is reversed or arranged sideways. It will become a form.

  Moreover, in the said embodiment, although the friction material 9 became a form heated within the heating furnace 2, the heating furnace 2 may be abbreviate | omitted. The friction material 9 may be heated, for example, in an exposed state in a factory or in an indoor space of a building, or may be heated in a simple enclosure.

  Moreover, in the said embodiment, although the heater 3 and the weighing | measuring device 6 did not become a form which moves horizontally, the heating apparatus 1 may deform | transform as follows, for example. FIG. 6 is a view showing a modified example of the operation content of each device of the heating device 1. The heater 3 of the heating device 1 may be movable in the lateral direction as shown in FIG. 6 (A), for example. Further, the weighing device 6 of the heating device 1 may be movable in the horizontal direction as shown in FIG. 6B, for example. In these modified examples, it is also possible to omit the taking in / out device 11 for taking in and out the friction material 9.

1. Heating device: 2. Heating furnace: 3. Heating device: 4. Strut: 4S ... Upper end of strut: 5. Hole: 6. Metering device: 7. Entrance / exit: 8. Control device : 9 ··· Friction material: 10 ··· Jig: 11 · · Loading and unloading device: 11a, 11b · · Rail: 12 · · Lifting device: 12b · · Cylinder: 12c · · Piston: 12d · · ·

Claims (7)

A friction material heating device for heating the surface of a brake friction material,
Heating means for heating the surface of the friction material;
A friction material support that forms a portion where the friction material is supported when heated by the heating means;
A measuring unit for measuring a change in weight of the friction material supported by the friction material support unit,
Friction material heating device. The friction material support portion has a support column that supports the friction material at its upper end,
The measuring unit measures a change in weight of the friction material based on a load received from the support;
The friction material heating apparatus according to claim 1. When the measuring unit detects that the weight change of the friction material has reached a predetermined amount, the control unit further stops a heating of the friction material,
The friction material heating apparatus according to claim 1 or 2. When the measuring unit detects that the weight change of the friction material has reached a predetermined amount, the control unit stops the heating means, separates the friction material from the heating means, and air to the friction material. The heating of the friction material is stopped by at least one of the spraying of
The friction material heating apparatus according to claim 3. A friction material heating method for heating the surface of a brake friction material,
Monitoring the weight change of the friction material in a state where the surface is baked by the heating means,
Based on the weight change, heating of the friction material by the heating means is stopped.
Heating method for friction material. When the weight change of the friction material reaches a predetermined amount, heating of the friction material is stopped.
The method for heating a friction material according to claim 5. When the weight change of the friction material reaches a predetermined amount, the heating of the friction material is performed by at least one of stopping the heating means, separating the friction material from the heating means, and blowing air to the friction material. To stop the
The method for heating a friction material according to claim 5 or 6.

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