CN201586899U - New type internal grinding device - Google Patents

Abstract

This utility model discloses a novel internal grinding device. It includes an oil motor (1), an extension rod (2), a short spindle (3), a thrust self-aligning roller bearing (4), a bearing housing (5), a grinding wheel guide (6), and a grinding wheel (7). The oil motor (1) is located inside the extension rod (2) and connected to the short spindle (3). The thrust self-aligning roller bearing (4) is located inside the bearing housing (5) and connected to the short spindle (3). A grinding wheel guide (6) is installed at the front end of the short spindle (3), and a grinding wheel (7) is installed on the grinding wheel guide (6). The extension rod (2) is connected to the bearing housing (5). This utility model increases the grinding wheel's downward pressure and improves grinding efficiency by changing the motor-driven grinding wheel of the long spindle to an oil motor-driven grinding wheel of the short spindle. The spindle cooling device (8) installed outside the bearing housing (5) reduces spindle heat generation, improves equipment lifespan, and ensures stable operation of the internal grinding device.

Description

New type internal grinding device

technical field

The utility model relates to a novel internal circular grinding device.

Background technique

Traditional internal grinding devices use motors or electric spindles to drive the grinding wheel. Due to the small inner circle of the seamless alloy steel pipe and the large size of the motor, the motor cannot be installed inside the steel pipe, and the grinding wheel and the motor can only be connected through an extension rod. In order to process the deepest part of the seamless alloy steel pipe, the extension rod and the spindle are often used The length exceeds six meters, and because the above-mentioned internal grinding, the grinding wheel vibrates greatly, and the shaft end heats up and is transmitted to the grinding wheel, causing the bearing at the grinding wheel to be easily damaged, which cannot meet the long-term stable production; the working efficiency of internal grinding and the grinding wheel It is related to the downforce. The internal grinding head driven by the motor has extremely poor rigidity due to the super long spindle, so the downforce cannot be increased too much. If the grinding wheel is blocked, the motor is easily damaged.

Utility model content

The purpose of the utility model is to provide a new type of internal grinding device. It changes the motor-driven grinding wheel of the long spindle to the oil motor-driven grinding wheel of the short spindle, which increases the down pressure of the grinding wheel and improves the efficiency of grinding production; reduces the heat generation of the spindle and ensures the stable operation of the internal grinding device.

The technical scheme of the utility model: a new type of internal grinding device, including an oil motor, an extension rod, a short main shaft, a thrust self-aligning roller bearing, a bearing seat, a grinding wheel guide seat and a grinding wheel; the oil motor is placed inside the extension rod, and the oil motor It is connected with the short main shaft; the thrust self-aligning roller bearing is placed in the bearing seat and connected with the short main shaft; the front end of the short main shaft is equipped with a grinding wheel guide seat, and the grinding wheel guide seat is equipped with a grinding wheel; the extension rod is connected with the bearing seat. Changing the original long main shaft to a short main shaft increases the rigidity of the main shaft; and connecting it to the bearing housing with a thrust self-aligning roller bearing can greatly increase the downforce of the grinding wheel and improve the grinding production efficiency.

In the aforementioned new type internal grinding device, a main shaft cooling device is installed outside the cylindrical body of the bearing housing. The short main shaft and thrust self-aligning roller bearings are cooled by circulating water, which improves the service life of the equipment.

In the aforementioned new type internal grinding device, the oil motor and the short main shaft are connected by a coupling. Since the grinding device vibrates greatly during operation, the radial runout of the oil motor can be reduced through the coupling to prevent oil leakage from the oil motor.

In the aforementioned new type internal grinding device, the outer dimension of the oil motor is smaller than the inner diameter of the processed steel pipe. Due to the small size of the oil motor, it can enter the interior of the steel pipe.

Compared with the prior art, the utility model increases the rigidity of the main shaft, increases the down pressure of the grinding wheel, and improves the efficiency of grinding production by changing the motor-driven grinding wheel of the long main shaft into the oil motor-driven grinding wheel of the short main shaft; The spindle cooling device installed outside the seat cylinder reduces the heating of the spindle, improves the life of the equipment, and ensures the stable operation of the internal grinding device.

Description of drawings

Fig. 1 is a structural representation of the utility model.

The marks in the drawings are: 1-oil motor, 2-extension rod, 3-short main shaft, 4-thrust self-aligning roller bearing, 5-bearing seat, 6-grinding wheel guide seat, 7-grinding wheel, 8-spindle cooling Device, 9-coupling, 10-extension rod socket.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Embodiment of the utility model: a new type of internal grinding device, as shown in Figure 1, including oil motor 1, extension rod 2, short main shaft 3, thrust spherical roller bearing 4, bearing seat 5, grinding wheel guide Seat 6 and grinding wheel 7; oil motor 1 is placed inside extension rod 2, and oil motor 1 is connected with short main shaft 3; thrust self-aligning roller bearing 4 is placed in bearing housing 5 and connected with short main shaft 3; short main shaft 3 The front end is equipped with emery wheel guide seat 6, and emery wheel 7 is installed on the emery wheel guide seat 6; Extension bar 2 is connected with extension bar socket 10, and extension bar 2 is connected with bearing seat 5 usefulness bolts. A main shaft cooling device 8 is installed outside the cylinder body of the bearing housing 5 . The oil motor 1 and the short main shaft 3 are connected by a coupling 9 . Changing the original long main shaft to a short main shaft 3 increases the rigidity of the main shaft; and connecting it with the bearing housing 5 with a thrust self-aligning roller bearing 4 can greatly increase the downforce of the grinding wheel and improve the grinding production efficiency. The installed main shaft cooling device 8 cools the short main shaft 3 and the thrust self-aligning roller bearing 4 through circulating water, which improves the service life of the equipment. The oil motor 1 and the short main shaft 3 are connected by a coupling 9, which can reduce the radial runout of the oil motor 1 and prevent the oil motor 1 from leaking oil.

When working, put the internal grinding device of the utility model inside the seamless steel pipe, the oil motor 1 drives the short main shaft 3 to rotate through the coupling 9, and the short main shaft 3 drives the grinding wheel guide seat 6 to rotate, thereby driving the grinding wheel 7 for grinding Operation.

Claims (4)

1. A new type of internal grinding device, characterized in that it includes an oil motor (1), an extension rod (2), a short main shaft (3), a thrust self-aligning roller bearing (4), a bearing seat (5), The grinding wheel guide (6) and the grinding wheel (7); the oil motor (1) is placed inside the extension rod (2), and the oil motor (1) is connected with the short main shaft (3); the thrust spherical roller bearing (4) is placed In the bearing seat (5), and connected with the short main shaft (3); the front end of the short main shaft (3) is equipped with a grinding wheel guide (6), and the grinding wheel (7) is installed on the grinding wheel guide (6); the extension rod (2 ) is connected with the bearing housing (5). 2. The new type of internal grinding device according to claim 1, characterized in that: a spindle cooling device (8) is installed outside the cylinder of the bearing housing (5). 3. The new type of internal grinding device according to claim 1, characterized in that: the oil motor (1) and the short main shaft (3) are connected by a coupling (9). 4. The novel internal grinding device according to claim 1, characterized in that: the external dimension of the oil motor (1) is smaller than the inner diameter of the processed steel pipe.

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