A device for external cylindrical grinding of seamless steel pipes

Abstract

The utility model discloses a seamless steel tube outer circle grinding device, including base, the one side of base is installed passive wheel A, and its other side is installed driving wheel, and the surface of base is installed passive wheel B simultaneously, install sand belt on driving wheel, passive wheel A and passive wheel B, be provided with the floating pressure regulating mechanism on the base, the floating pressure regulating mechanism includes the pressure regulating motor of installation on base, and the output shaft of pressure regulating motor is connected with screw rod, and the outside of screw rod is screw -assembled with counterweight sliding block, the bottom of sand belt sets up seamless steel pipe. This full floating seamless steel tube outer circle grinding device can reduce manual regulation error, realizes angular compensation range, improves vibration suppression capacity, reduces the incidence of spiral defect, reduces surface roughness fluctuation, and the surface roughness after grinding can reach Ra3.2mu m-6.3mu m, without step, blue and throwing print, without spiral, realize greatly reduce the scrap rate of steel pipe to improve processing benefit.

Description

Technical Field

[0001] This utility model relates to the field of metal processing equipment technology, specifically to a seamless steel pipe outer diameter grinding device. Background Technology

[0002] Seamless steel pipes are prone to surface cracks and dents during production. These defects must be eliminated through grinding; otherwise, the product will be scrapped and downgraded, resulting in economic losses. Existing external grinding machines mainly use a rear-mounted weight to traction and adjust the pressure of the grinding wheel belt. For example, patent publication number CN113043105A includes a support plate that can move along the lathe bed, a spare spindle box that is rotatably mounted on the support plate and can rotate in a plane perpendicular to the lathe spindle, and limiting posts fixed on the support plate and located on both sides of the spare spindle box to limit its rotation amplitude. While the aforementioned device ensures consistent cutting force during grinding, has a simple structure, and allows for convenient adjustment of the cutting force, in actual use, it employs a traction rope positioned behind the main motor, with a suspended weight at the other end to control the pressure. This results in poor adjustment accuracy and difficulty in operation, particularly in the counterweight section, leading to potential defects in grinding precision. Utility Model Content

[0003] The purpose of this invention is to provide a seamless steel pipe external cylindrical grinding device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, a seamless steel pipe external cylindrical grinding device is provided, comprising a base, a driven wheel A mounted on one side of the base and a driven wheel mounted on the other side, a driven wheel B mounted on the surface of the base, and a sanding belt mounted on the driven wheel, driven wheel A and driven wheel B; a floating pressure regulating mechanism is provided on the base, the floating pressure regulating mechanism includes a pressure regulating motor mounted on the base, and the output shaft of the pressure regulating motor is connected to a screw, and a counterweight slider is screwed onto the outer side of the screw, and a seamless steel pipe is provided at the bottom of the sanding belt.

[0005] Furthermore, both ends of the base are provided with U-shaped grooves, and the interiors of the two sets of U-shaped grooves are respectively provided with passive wheel A and passive wheel B, and the active wheel, passive wheel A and passive wheel B are distributed in a triangle.

[0006] Furthermore, a connecting frame is installed on the outer side of the passive wheel A, and shock absorbers are provided on both sides of the bottom of the connecting frame. The shock absorbers are installed on the base, and elastic frames are installed on both sides of the bottom of the base.

[0007] Furthermore, the base has a waist hole, and the shaft of the driven wheel A is inserted inside the waist hole. A synchronous wheel A is installed on the shaft of the driven wheel A, and a synchronous wheel B is provided on one side of the synchronous wheel A. The synchronous wheel B and the synchronous wheel A are connected by a synchronous belt.

[0008] Furthermore, a main shaft is mounted on the synchronous pulley B, and the main shaft is driven to rotate by a motor; the synchronous pulley B and the synchronous pulley A have the same dimensions.

[0009] Furthermore, the floating pressure regulating mechanism also includes a limiting groove, which is formed on the surface of the base. A limiting block is slidably arranged inside the limiting groove, and the limiting block is installed at the bottom of the counterweight slider. The limiting block and the limiting groove have an isosceles trapezoidal cross section.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the pressure regulating motor drives the screw to move the counterweight slider horizontally on the limiting groove of the base, and adjusts the sanding belt contact pressure in real time through the lever principle; the pressure regulating motor adopts a servo motor, which drives the screw to rotate through the coupling, and the counterweight slider has a built-in high-density tungsten alloy counterweight block, and the grinding contact point is located at the tangent point between the sanding belt and the seamless steel pipe; it can reduce manual adjustment errors, realize angular compensation range, improve vibration suppression capability, and reduce the occurrence rate of spiral defects; it reduces surface roughness fluctuations, and the surface roughness after grinding can reach Ra3.2μm-6.3μm, without steps, bluing and polishing marks, and without spiral marks, thus greatly reducing the scrap rate of steel pipes and improving processing efficiency. Attached Figure Description

[0011] Figure 1 This is a front view schematic diagram of the structure of this utility model; Figure 2 This is a bottom view of the structure of this utility model; Figure 3 This is a top view of the structure of this utility model; Figure 4 This is a rear view of the structure of this utility model; Figure 5 This is a cross-sectional view of the structure of this utility model.

[0012] The following are the labels in the diagram: 1. Base; 2. Passive wheel A; 21. Passive wheel B; 22. Driving wheel; 23. Sanding belt; 24. Synchronous wheel A; 25. Synchronous wheel B; 251. Main shaft; 26. Connecting frame; 27. Shock absorber; 3. Elastic frame; 4. Floating pressure regulating mechanism; 41. Pressure regulating motor; 42. Screw; 43. Counterweight slider; 44. Limiting groove; 441. Limiting block; 5. Seamless steel pipe. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-5 This utility model provides a seamless steel pipe outer diameter grinding device, including a base 1, a driven wheel A2 installed on one side of the base 1 and a driven wheel 22 installed on the other side, a driven wheel B21 installed on the surface of the base 1, and a sanding belt 23 installed on the driven wheel 22, the driven wheel A2 and the driven wheel B21; a floating pressure regulating mechanism 4 is provided on the base 1, the floating pressure regulating mechanism 4 includes a pressure regulating motor 41 installed on the base 1, and the output shaft of the pressure regulating motor 41 is connected to a screw 42, and a counterweight slider 43 is screwed onto the outside of the screw 42, and a seamless steel pipe 5 is provided at the bottom of the sanding belt 23.

[0015] Working principle: The main motor is connected to the drive wheel 22 via belt drive, driving the sanding belt 23 to rotate around the drive wheel 22 and the driven wheels A2 and B21; the wheel system has a triangular layout: the driven wheels B21 and the drive wheel 22 are rigidly fixed to the base 1, and the driven wheel A2 is floatingly connected to the base 1 through a combined shock absorber 27, forming a triangular support structure that can dynamically swing; by using the triangular layout of the wheel system and the driven wheel A2, and in conjunction with the shock absorber 27, angular compensation is performed; the range is increased from 0° to ±1.5°, reducing the roundness deviation caused by coaxiality deviation; the pressure regulating motor 41 drives the screw 42 to move the counterweight slider 43 horizontally on the limiting groove 44 of the base 1, adjusting the contact pressure of the sanding belt 23 in real time through the lever principle; the pressure regulating motor 41 is a servo motor, which... The screw 42 is driven to rotate via a coupling. The counterweight slider 43 has a built-in high-density tungsten alloy counterweight. The grinding contact point is located at the tangent point between the abrasive belt 23 and the seamless steel pipe 5. The abrasive belt 23 has a mesh size range of 80 to 120 and uses a motor with a power of 2.2KW. This reduces manual adjustment errors, achieves angular compensation range, improves vibration suppression capability, and reduces the occurrence rate of spiral defects. It also reduces surface roughness fluctuations, and the surface roughness after grinding can reach Ra3.2μm-6.3μm, with no steps, bluing, or polishing marks, and no spiral marks. This greatly reduces the scrap rate of steel pipes and improves processing efficiency. At the same time, floating grinding can increase the steel pipe grinding specifications from Φ273 to Φ1067 to a maximum of Φ1219, and increase the efficiency from grinding 6 steel pipes per day to grinding 8 steel pipes per day.

[0016] As a preferred embodiment, the base 1 has U-shaped grooves at both ends, and the two sets of U-shaped grooves are respectively provided with passive wheel A2 and passive wheel B21. The driving wheel 22, passive wheel A2 and passive wheel B21 are arranged in a triangular distribution.

[0017] A connecting frame 26 is installed on the outer side of the passive wheel A2, and shock absorbers 27 are provided on both sides of the bottom of the connecting frame 26. The shock absorbers 27 are installed on the base 1, and elastic frames 3 are installed on both sides of the bottom of the base 1.

[0018] The base 1 has a waist hole, and the shaft of the driven wheel A2 is inserted inside the waist hole. The shaft of the driven wheel A2 is mounted on the shaft of the driven wheel A2, and a synchronous wheel B25 is provided on one side of the synchronous wheel A24. The synchronous wheel B25 and the synchronous wheel A24 are connected by a synchronous belt.

[0019] A main shaft 251 is mounted on the synchronous pulley B25, and the main shaft 251 is driven to rotate by a motor; the synchronous pulley B25 and the synchronous pulley A24 have the same size.

[0020] In a preferred embodiment, the floating pressure regulating mechanism 4 further includes a limiting groove 44, which is formed on the surface of the base 1. A limiting block 441 is slidably disposed inside the limiting groove 44, and the limiting block 441 is installed at the bottom of the counterweight slider 43. The cross sections of the limiting block 441 and the limiting groove 44 are isosceles trapezoids.

[0021] like Figure 1-5 As shown: the driving wheel 22 and the driven wheel A2 and driven wheel B21 are arranged in a triangle. The driving wheel 22 and the driven wheel B21 are fixed. The driven wheel A2 is connected to the shock absorber 27 and can be floated and adjusted. The old mechanism uses a cylinder shock absorber, which is replaced by a combined shock absorber 27. The pressure regulating motor 41 is connected to the screw 42 to control the sliding of the counterweight slider 43 on the base 1. That is, the screw 42 controls the center of gravity of the counterweight slider 43 to be adjusted laterally. When the counterweight slider 43 approaches the drive wheel 22, the drive wheel 22 and the left end of the base 1 move downward and compress the spring on the elastic frame 3, reducing the vertical distance between the abrasion point on the sanding belt 23 and the seamless steel pipe 5, thereby adjusting the grinding intensity and achieving rapid pressure control. The original method of adjusting the center of gravity with weights has been changed to control with the motor and screw 42, which can efficiently and conveniently adjust the pressure, grinding intensity and angle. Combined with floating grinding, the surface roughness can reach Ra6.3um, and there are no obvious surface defects.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seamless steel pipe outer diameter grinding device, comprising a base (1), characterized in that: A passive wheel A (2) is installed on one side of the base (1), and an active wheel (22) is installed on the other side. A passive wheel B (21) is installed on the surface of the base (1). A sanding belt (23) is installed on the active wheel (22), the passive wheel A (2), and the passive wheel B (21). A floating pressure regulating mechanism (4) is provided on the base (1). The floating pressure regulating mechanism (4) includes a pressure regulating motor (41) installed on the base (1). The output shaft of the pressure regulating motor (41) is connected to a screw (42). A counterweight slider (43) is screwed onto the outside of the screw (42). A seamless steel pipe (5) is provided at the bottom of the sanding belt (23).

2. The seamless steel pipe external grinding device according to claim 1, characterized in that: Both ends of the base (1) are provided with U-shaped grooves, and the two sets of U-shaped grooves are respectively provided with passive wheel A (2) and passive wheel B (21). The active wheel (22), passive wheel A (2) and passive wheel B (21) are distributed in a triangle.

3. The seamless steel pipe outer diameter grinding device according to claim 2, characterized in that: A connecting frame (26) is installed on the outside of the passive wheel A (2), and shock absorbers (27) are provided on both sides of the bottom of the connecting frame (26). The shock absorbers (27) are installed on the base (1), and elastic frames (3) are installed on both sides of the bottom of the base (1).

4. The seamless steel pipe outer diameter grinding device according to claim 3, characterized in that: The base (1) has a waist hole, and the shaft of the passive wheel A (2) is inserted inside the waist hole. The shaft of the passive wheel A (2) is equipped with a synchronous wheel A (24), and a synchronous wheel B (25) is provided on one side of the synchronous wheel A (24). The synchronous wheel B (25) and the synchronous wheel A (24) are connected by a synchronous belt.

5. The seamless steel pipe outer diameter grinding device according to claim 4, characterized in that: The synchronous pulley B (25) is equipped with a main shaft (251), and the main shaft (251) is driven to rotate by a motor; the synchronous pulley B (25) and the synchronous pulley A (24) have the same size.

6. The seamless steel pipe outer diameter grinding device according to claim 1, characterized in that: The floating pressure regulating mechanism (4) also includes a limiting groove (44), and the limiting groove (44) is opened on the surface of the base (1). A limiting block (441) is slidably arranged inside the limiting groove (44), and the limiting block (441) is installed at the bottom of the counterweight slider (43). The cross-section of the limiting block (441) and the limiting groove (44) is an isosceles trapezoid.

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