Precast hole scab removing device

A precast hole scab removing device, which comprises a stand (1), a base plate (2), a left spring (3), a left sliding sleeve (4), a left floating column (5), a plurality of ejector pins (6), a lifting plate (7), two guide sleeves (8), two guide pillars (9), an air cylinder (10), a clamp cylinder I (11), a supporting pole I (12), a right floating column (13), a right sliding sleeve (14), a right spring (15), a supporting pole II (16), a clamp cylinder II (17), a clamp cylinder III (18) and a supporting pole III (19), wherein the base plate (2) is fixed on a platform of the stand (1);

• the left sliding sleeve (4) and the right sliding sleeve (14) are fixed on the base plate (2), the left floating column (5) matches with the left sliding sleeve (4), and the right floating column (13) matches with the right sliding sleeve (14);
• the left spring (3) is mounted in the left sliding sleeve (4) and is positioned below the left floating column (5), and the right spring (15) is mounted in the right sliding sleeve (14) and is positioned below the right floating column (13);
• the supporting pole I (12), the supporting pole II (16) and the supporting pole III (19) are respectively fixed at corresponding positions of the base plate (2) and respectively correspond to locating points of a workpiece;
• the clamp cylinder I (11), the clamp cylinder II (17) and the clamp cylinder III (18) are also fixed on corresponding positions of the base plate (2), and clamping points of the clamp cylinder I (11), the clamp cylinder II (17) and the clamp cylinder III (18) are respectively placed above the supporting pole I (12), the supporting pole II (16) and the supporting pole III (19);
• the plurality of ejector pins (6) are fixed on the lower surface of the lifting plate (7), and the positions of the ejector pins (6) respectively correspond to positions, at which scabs need to be removed, on the workpiece;
• and the two guide pillars (9) are fixed at the upper end of the lifting plate (7), the two guide sleeves (8) matching with the two guide pillars (9) are fixed on a head plate of the stand (1), the air cylinder (10) is also fixed on the head plate of the stand (1), and an output end of the air cylinder (10) is connected with the top end of the lifting plate (7).