Friction plate curing and clamping tool for motor and clamping method

Abstract

The invention discloses a motor friction plate curing and clamping tool and a clamping method, the curing and clamping tool comprises an upper connecting plate and a lower connecting plate which are connected together through a bolt, a friction plate and a base plate are sequentially stacked on the lower connecting plate, and a spring is placed between the base plate and the upper connecting plate. Compared with the prior art, the clamping tool has the positive effects that the clamping tool is composed of the bolts, the connecting plates, the base plates, the nuts, the springs and the like, the clamping pressure is 0.2-0.3 MPa, the motor friction plate is clamped and solidified through the clamping tool, glue on the surface of the metal matrix can be fully bonded with a friction material, and cracks are avoided. Compared with a hot pressing process, the clamping tool is used for carrying out a cold pressing and clamping curing process, so that the production efficiency can be obviously improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to a friction plate curing clamping tool for a motor and a clamping method. Background Art

[0002] The DC disc brake of the electromagnetic three-phase asynchronous brake motor is installed on the end cover of the motor non-shaft extension end. When the power is connected, the brake starts to work. Under the action of electromagnetic suction, the electromagnet attracts the armature and compresses the spring. The brake disc is separated from the armature and the end cover, and the motor runs. When the power is cut off, the electromagnet loses the electromagnetic force, and the spring pushes the armature to press the brake disc and the friction plate, generating friction, and the motor stops rotating. Motor friction plate 2 (such as Figure 2 As shown in the figure, hot pressing or friction material hot pressing-bonding is generally used, which has low production efficiency and complicated process. Raw material mixing-cold pressing-curing-machining process is used to reduce energy consumption and improve production efficiency. However, after cold pressing-curing, the metal matrix 1 (as shown in the figure) Figure 1 The bonding effect with the friction material is poor and cracks appear on the side.

[0003] The motor friction plate is mainly composed of a metal matrix and friction materials. The friction materials are mainly composed of resin, rubber and friction components. Traditional motor friction plates are formed by hot pressing, or the friction materials are hot pressed and then bonded. The hot pressing temperature is 150℃-160℃. The hot pressing is changed to cold pressing one-piece molding, which has high production efficiency and saves energy consumption. After the cold pressed friction plate is thermally cured at 160-190℃, cracks appear on the bonding side of the metal matrix and the friction material. In order to eliminate the side cracks and further improve the bonding strength of the product, the friction plate clamping and curing process is adopted. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention proposes a fixture and a method for curing and clamping a friction plate for a motor.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a friction plate curing clamping tool for a motor, including an upper connecting plate and a lower connecting plate connected together by bolts, on which the friction plate and the pad are stacked in sequence, and a spring is placed between the pad and the upper connecting plate.

[0006] Furthermore, the connecting plate has a thickness of 15-30 mm.

[0007] Furthermore, the thickness of the pad is 10-18 mm.

[0008] Furthermore, the number of the springs is 2-20.

[0009] Furthermore, nuts are used to fasten the connecting plate.

[0010] Furthermore, the specification of the bolt is M (20, 24, 26, 28, 30) x L, wherein L is 200-10000 mm.

[0011] The present invention also provides a clamping method based on a motor friction plate curing clamping tool, comprising the following steps:

[0012] Step 1: Mix the resin, rubber, graphite, alumina and diatomaceous earth friction materials;

[0013] Step 2: cold-pressing the metal matrix and the friction material mixed in step 1 in a mold at room temperature to obtain a friction plate;

[0014] Step 3: Clamp the friction plate:

[0015] The lower connecting plate is fastened and connected by nuts and bolts, and then a plurality of friction plates are stacked on the lower connecting plate, and then a pad is placed on the uppermost friction plate, a spring is placed on the pad, and an upper connecting plate is placed on the spring, and the upper connecting plate and the lower connecting plate are connected by bolts, and finally the nuts are tightened to complete the clamping of the friction plate;

[0016] Step 4: Curing the friction plate clamped in step 3 at 160-190°C for 6 hours. After curing, loosen the nut and take out the friction plate.

[0017] Step 5: Mechanically process the cured friction plate to obtain a friction plate product for a motor.

[0018] Furthermore, in step 2, the pressing time of cold pressing in the mold is 2 min / piece.

[0019] Furthermore, in step three, when the friction plate is clamped, 2-20 springs are placed on the backing plate, and the nut is tightened to uniformly compress the 2-20 springs to a specified height, ensuring that a compression force of 0.2-0.3 MPa is provided to the friction plate.

[0020] Compared with the prior art, the present invention has the following positive effects:

[0021] The clamping fixture of the present invention is composed of bolts, connecting plates, pads, nuts, springs, etc., with a clamping pressure of 0.2-0.3MPa. The clamping fixture of the present invention is used to clamp and solidify the motor friction plate, and the glue on the surface of the metal substrate can be fully bonded with the friction material to avoid cracks. Compared with the hot pressing process, the cold pressing + clamping and solidification process using the clamping fixture of the present invention can significantly improve production efficiency and reduce energy consumption. The specific advantages are as follows:

[0022] (1) When the clamping tool of the present invention is used to produce the motor friction plate, a cold pressing process (normal temperature) is adopted, and the pressing time is reduced from the original 15 min / plate (hot pressing) to 2 min / plate (cold pressing). The mold equipment is simple, the production efficiency is high, and the energy consumption is reduced;

[0023] (2) The clamping tool of the present invention facilitates the production of motor friction plates using a clamping and curing process, thereby eliminating the phenomenon of cracks appearing on the side of the product after the cold-pressed friction plates are thermally cured at 160-190° C. in the prior art, thereby improving the bonding strength of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0025] Figure 1 It is a schematic structural diagram of a metal substrate 1 of a friction plate for a motor;

[0026] Figure 2 It is a structural schematic diagram of the friction plate for the motor;

[0027] Figure 3 It is a schematic structural diagram of the pad 5;

[0028] Figure 4 It is a front view of the fixture for curing and clamping the friction plate for the motor of the present invention;

[0029] Figure 5 A three-dimensional diagram of a fixture for curing and clamping a friction plate for a motor according to the present invention;

[0030] The reference numerals in the figure include: 1-metal substrate; 2-friction plate for motor; 3-nut; 4-bolt; 5-backing plate; 6-connecting plate; 7-spring; DETAILED DESCRIPTION

[0031] A friction plate curing fixture for a motor, such as Figures 3 to 5 As shown, it includes: a nut 3, a bolt 4, a pad 5, a connecting plate 6, a spring 7, etc., wherein:

[0032] The thickness of the connecting plate 6 is 15-30 mm, and four through holes are set at the four corners of the connecting plate 6 for connecting with bolts 4, and fixed by nuts 3; a plurality of friction plates 2 are stacked on the bottom connecting plate 6, and then a pad 5 is placed on the top friction plate 2; a plurality of springs 7 are placed on the pad 5, and the upper connecting plate 6 is placed on the spring 7, and then the upper and lower connecting plates are fastened and connected by nuts 3 and bolts 4 to solidify and clamp the friction plates.

[0033] The specifications of the bolt 4 are: M (20, 24, 26, 28, 30) x L (L = 200-10000) mm, and the bolt length specification is selected according to the production quantity.

[0034] The thickness of the pad 5 is 10-18 mm, and the number of pads is selected according to the production quantity.

[0035] The nut 3 is matched with the bolt 4.

[0036] The number of the springs 7 is 2-20, which can provide a compression force of 600-1000 kg.

[0037] The method for using the motor friction plate curing clamping tool of the present invention comprises the following steps:

[0038] Step 1: Mix friction materials such as resin, rubber, graphite, alumina, diatomaceous earth, etc.;

[0039] Step 2: cold-press the metal matrix and the friction material mixed in step 1 in a mold at room temperature to obtain a friction plate; the pressing time is 2 minutes / plate;

[0040] Step 3: Clamp the friction plate:

[0041] The lower connecting plate 6 is fastened and connected with the bolt 4 through the nut 3, and then a plurality of friction plates 2 are stacked on the connecting plate 6, and then the pad 5 is placed on the uppermost friction plate 2; 2-20 springs 7 are placed on the pad 5, and the upper connecting plate 6 is placed on the spring 7, and the upper and lower connecting plates are connected through the bolt 4, and finally the nut 3 is tightened to uniformly compress the 2-20 springs 7 to a specified height to provide a compression force of 0.2-0.3MPa to the friction plate;

[0042] Step 4: Curing the friction plate clamped in step 3 at 160-190°C for 6 hours. After curing, loosen the nut 3 and take out the friction plate.

[0043] Step 5: Mechanically process the cured friction plate to obtain a friction plate product for a motor.

[0044] Working principle of the present invention:

[0045] The clamping tool of the present invention is composed of bolts, connecting plates, pads, nuts and springs. The friction plates and pads are stacked in sequence in the assembled tooling, and the nuts are tightened. The clamping pressure of the friction plates is 0.2-0.3MPa. After curing at 160-190°C, the side cracks of the friction plate products can be eliminated.

Claims

1. A friction plate curing clamping tool for a motor, characterized in that: The invention comprises an upper connecting plate and a lower connecting plate connected together by bolts, a friction plate and a pad are sequentially stacked on the lower connecting plate, and a spring is placed between the pad and the upper connecting plate.

2. The motor friction plate curing clamping tool according to claim 1, characterized in that: The thickness of the connecting plate is 15-30 mm.

3. The motor friction plate curing clamping tool according to claim 1, characterized in that: The thickness of the pad is 10-18 mm.

4. The motor friction plate curing clamping tool according to claim 1, characterized in that: The number of the springs is 2-20.

5. The motor friction plate curing clamping tool according to claim 1, characterized in that: The connecting plate is fastened with nuts.

6. The fixture for curing and clamping a friction plate for a motor according to claim 5, characterized in that: The specifications of the bolts are M (20, 24, 26, 28, 30) x L, where L is 200-10000 mm.

7. The fixture for curing and clamping a friction plate for a motor according to claim 6, characterized in that: The nut is matched with the bolt.

8. A clamping method based on the motor friction plate curing clamping tooling as claimed in claim 1, characterized in that: The steps include: Step 1: Mix the resin, rubber, graphite, alumina and diatomaceous earth friction materials; Step 2: cold-pressing the metal matrix and the friction material mixed in step 1 in a mold at room temperature to obtain a friction plate; Step 3: Clamp the friction plate: The lower connecting plate is fastened and connected by nuts and bolts, and then a plurality of friction plates are stacked on the lower connecting plate, and then a pad is placed on the uppermost friction plate, a spring is placed on the pad, and an upper connecting plate is placed on the spring, and the upper connecting plate and the lower connecting plate are connected by bolts, and finally the nuts are tightened to complete the clamping of the friction plate; Step 4: Curing the friction plate clamped in step 3 at 160-190°C for 6 hours. After curing, loosen the nut and take out the friction plate. Step 5: Mechanically process the cured friction plate to obtain a friction plate product for a motor.

9. The clamping method of the motor friction plate curing clamping tooling according to claim 8, characterized in that: In step 2, the cold pressing time in the mold is 2 min / piece.

10. The clamping method of the motor friction plate curing clamping tooling according to claim 8, characterized in that: In step three, when clamping the friction plate, place 2-20 springs on the pad, tighten the nut to evenly compress the 2-20 springs to a specified height, and ensure that a compression force of 0.2-0.3 MPa is provided to the friction plate.

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