An internal and external grinding device for processing aluminum alloy pipes

Abstract

The present invention provides an inner and outer circle grinding device for processing pipes; the device combines inner circle grinding and outer circle grinding on one device, and can grind the inner and outer surfaces of the pipe respectively under one clamping. The outer circle grinding part can grind the pipe fittings with rust or scratches on the surface, so that the production efficiency and appearance quality of the finished product are not affected in the process of making the pipe fittings into finished products; the inner circle grinding part can detect scratches or defects on the inner surface at different positions at any time through an industrial camera; through the connection mechanism and circuit placed in the inner circle grinding spindle, the grinding wheel can rotate at high speed under the drive of a high-speed motor, realize high-speed surface grinding, and ensure the grinding quality; realize circumferential small fan grinding, effectively avoid the problems of deep grooves and local over-grinding caused by point grinding, and make the grinding surface smooth and continuous.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe processing, and in particular relates to an internal and external circle grinding device for processing pipes. Background Art

[0002] Pipes are widely used in industrial pipelines and mechanical components in sectors such as petroleum, chemical, medical, food, light industry, and mechanical instrumentation. However, pipes are prone to rusting after long-term storage, and scratches can occur from collisions between pipes during long-distance transportation. These problems can affect subsequent manufacturing and processing, resulting in defects in the finished product's appearance and quality, ultimately impacting production efficiency. For example, aluminum alloy liners for high-pressure gas cylinders operating at 20-70 MPa are manufactured using spinning or extrusion processes. Because these products are subjected to long-term high-pressure environments and repeated inflation and deflation, the fatigue resistance requirements for the aluminum alloy liners are extremely high. Scratches deeper than 0.05 mm are prohibited on the inner surface, and microcracks are strictly prohibited. However, during processing, extremely fine aluminum material can accumulate on the forming die, easily causing through-hole scratches on the inner or outer surfaces. These scratches must be promptly addressed using specialized grinding equipment to refinish the inner and outer surfaces of the aluminum alloy pipes. Currently, there is no dedicated equipment for internal and external circle grinding. Traditional grinding machines cannot perform simultaneous internal and external circle grinding and require multiple clamping, resulting in a long grinding process. At the same time, the internal and external circle grinding devices have low grinding efficiency and are prone to secondary scratches. Summary of the Invention

[0003] To address the aforementioned issues, the present invention provides an internal and external grinding device for pipe processing. This device can grind pipes with rusted or scratched internal and external surfaces, ensuring that the finished product remains efficient and has a good appearance. It can also polish the inner surface of pipes to meet specialized product requirements.

[0004] The present invention provides the following technical solutions:

[0005] An internal and external cylindrical grinding device for processing pipes, comprising a frame, and a spindle mechanism, a first centering support mechanism, an external cylindrical grinding mechanism, a second centering support mechanism, and an internal cylindrical grinding mechanism sequentially arranged on the frame;

[0006] The spindle mechanism includes a spindle motor, a spindle body, and a clamping mechanism; the clamping mechanism is provided at one end of the spindle body near the first centering support mechanism and is used to clamp the pipe; the spindle motor is connected to the spindle body and is used to drive the rotation of the clamping mechanism on the spindle body, thereby driving the rotation of the pipe;

[0007] The first centering support mechanism and the second centering support mechanism are used to support the pipe and ensure that the center of the pipe coincides with the center of the main shaft;

[0008] The outer circle grinding mechanism is used to grind the outer surface of the pipe; the inner circle grinding mechanism is used to grind the inner surface of the pipe.

[0009] According to the present invention, the cylindrical grinding mechanism comprises a side bed, a rack and pinion mechanism, an axial feed motor, a transverse feed mechanism, a transverse feed motor and a cylindrical grinding unit;

[0010] The side bed is driven by the axial feed motor through the gear rack mechanism and moves along the axial direction of the machine tool, and is controlled by the lateral feed motor through the lateral feed mechanism and moves along the lateral direction of the machine tool;

[0011] The outer cylindrical grinding unit is arranged on one side of the side bed and is used for continuously grinding the outer surface of the pipe.

[0012] According to the present invention, the external cylindrical grinding unit includes a sanding belt mounting mechanism, an external cylindrical grinding motor and a dust collection trough; the external cylindrical grinding motor drives the sanding belt mounting mechanism to rotate; the dust collection trough is arranged below the sanding belt mounting mechanism for collecting dust generated during the grinding process.

[0013] According to the present invention, the sanding belt installation mechanism includes a sanding belt, an upper wheel, a lower wheel, a spring mechanism, a clamping device and a connecting rod. The upper wheel is connected to the connecting rod by bolts through the spring mechanism and the clamping device. The external cylindrical grinding motor is connected and drives the lower wheel to rotate. The lower wheel is connected to the upper wheel through the sanding belt and drives the upper wheel to rotate. The connecting rod is connected to the frame.

[0014] According to the present invention, the sanding belt is tilted to increase the contact area between the sanding belt and the outer surface of the pipe as much as possible, thereby increasing the grinding efficiency and facilitating dust removal.

[0015] According to the present invention, when the abrasive belt needs to be replaced, the screw of the clamping device is loosened, the upper wheel is pressed down, and the abrasive belt is taken out and replaced, and then reinstalled.

[0016] According to the present invention, a dust collector connection port is provided on one side of the dust collection trough, and the dust collector connection port is used to connect a dust collector, and the dust collector is used to absorb dust in the dust collection trough.

[0017] According to the present invention, the vacuum cleaner is a flared high-power vacuum cleaner, which is fixed to the outside of the machine tool, and its pipeline moves axially along with the external cylindrical grinding mechanism.

[0018] According to the present invention, the internal grinding mechanism includes a tailstock, an axial motion mechanism, an axial drive motor, an up and down feed mechanism, an up and down feed drive motor, an internal grinding spindle, an internal grinding motor, a transmission mechanism and a grinding wheel;

[0019] The axial motion mechanism is arranged on the frame;

[0020] The axial motion mechanism is connected to the tailstock, and the axial drive motor is connected to the axial motion mechanism. Under the drive of the axial drive motor, the axial motion mechanism drives the entire internal grinding mechanism to move along the axial direction of the machine tool according to the speed and position set by the numerical control system;

[0021] The up and down feeding mechanism is arranged on the tailstock, and the up and down feeding driving motor is connected to the up and down feeding mechanism;

[0022] The internal grinding spindle is a hollow structure with a hollow inner cavity;

[0023] The first end of the internal grinding spindle is connected to the grinding wheel, and the second end of the internal grinding spindle is connected to the up-and-down feeding mechanism. The up-and-down feeding mechanism is driven by the up-and-down feeding motor, thereby driving the internal grinding spindle and the grinding wheel at the first end to move up and down according to the speed and position set by the numerical control system, and the position control accuracy is better than 0.02mm.

[0024] The transmission mechanism is installed in the hollow inner cavity of the internal grinding spindle, and one end is connected to the grinding wheel, and the other end is connected to the internal grinding motor. It can stably transmit the high-speed rotation of the internal grinding motor to the grinding wheel, thereby enabling the grinding wheel to rotate at high speed and, driven by the upper and lower feed mechanisms, grind the scratches on the inner surface of the pipe according to the set feed speed and position, and the grinding depth can be adjusted arbitrarily.

[0025] According to the present invention, during internal grinding, the machine tool spindle swings at a set speed within a range of -5° to +5° to ensure a smooth transition of the grinding area.

[0026] According to the present invention, the internal cylindrical grinding mechanism includes an industrial camera and an observer. The industrial camera is installed at the front end of the grinding wheel and is connected to the observer through a circuit arranged in the hollow internal cylindrical grinding spindle. It is used to observe and determine the scratch area and verify the grinding effect.

[0027] According to the present invention, the industrial camera has its own lighting function.

[0028] According to the present invention, the grinding wheel can be a conventional grinding wheel, or an abrasive flap wheel or a wire drawing wheel. For aluminum alloy pipe grinding, an abrasive flap wheel is preferred; for aluminum alloy polishing, a wire drawing wheel is preferred.

[0029] According to the present invention, the clamping mechanism includes a front claw fixing body, a front claw, and a first contact block; the front claw fixing body is arranged at the front end of the main shaft body; the front claw is arranged on the front claw fixing body, and the first contact block is connected to the front claw; the first contact block is used to clamp the pipe;

[0030] According to the present invention, the spindle mechanism is used to fix the pipe and rotate the pipe under the drive of the spindle motor. The rotation can be continuous rotation in the forward and reverse directions. The purpose of the rotation is to continuously grind the inner and outer surfaces; the rotation can also swing within the range of -5° to +5° to meet the requirements of inner surface grinding, and the swing speed is adjustable.

[0031] According to the present invention, the first centering support mechanism includes a first base, a gear rack mechanism, a first support mechanism and a first centering linkage mechanism; the first base can be mounted on the frame; the gear rack mechanism can be mounted below the frame or on the side of the machine tool;

[0032] The first base realizes the movement of the first centering support mechanism along the axial direction of the machine tool through a gear rack mechanism so as to be suitable for workpieces of different lengths;

[0033] The first support mechanism includes a first support module and a second support module, and are relatively arranged on the first base; the first support module and the second support module respectively include a support body, a moving block and a support roller, the support roller is arranged on the moving block, and the moving block is arranged on the support body; the support body is arranged on the first base and is connected to the first centering linkage mechanism; the first centering linkage mechanism drives the first support module and the second support module to move relative to each other, that is, to realize that the first support module and the second support module move toward or away from the center at the same time.

[0034] According to the present invention, the second centering support mechanism includes a second base, a second support mechanism and a second centering linkage mechanism; the second base can be mounted on the frame; the second base is fixedly mounted on the frame and cannot move along the axial direction of the machine tool;

[0035] The second support mechanism includes a first support module and a second support module, and is relatively arranged on the second base; the first support module and the second support module respectively include a support body, a moving block and a support roller, the support roller is arranged on the moving block, and the moving block is arranged on the support body; the support body is arranged on the second base and is connected to the second centering linkage mechanism; the second centering linkage mechanism drives the first support module and the second support module to move relative to each other, that is, to realize that the first support module and the second support module move toward or away from the center at the same time.

[0036] According to the present invention, a ruler with an accuracy of 1 mm is provided on the support body for determining the lateral position of the moving block and fixing it via a rack or a screw.

[0037] According to the present invention, the moving block is mounted on the supporting body via a rack or a screw.

[0038] According to the present invention, a plurality of supporting grooves are provided on the moving block, which can be used to directly install supporting rollers to adapt to the support of pipes with different diameter ranges.

[0039] According to the present invention, the supporting roller is mounted on the supporting groove of the supporting body via a bearing and a rotating shaft.

[0040] According to the present invention, the relatively arranged first support module and the second support module are respectively connected to the first centering linkage mechanism or the second centering linkage mechanism, which can realize simultaneous movement toward or away from the center. The synchronization of the two support modules simplifies the difficulty of centering adjustment.

[0041] According to the present invention, the positions of the support modules corresponding to products with different diameters can be automatically converted through a conversion equation between the product diameter and the relative positions of the two support modules, thereby achieving rapid installation and rapid centering.

[0042] Beneficial effects

[0043] The internal and external circle grinding device provided by the present invention combines internal circle grinding and external circle grinding on one device, and can grind the internal and external surfaces of the pipe respectively in one clamping.

[0044] The external cylindrical grinding section can grind pipe fittings with rust or scratches on the surface, so that the production efficiency and appearance quality of the finished products are not affected during the production process. The internal cylindrical grinding section can detect scratches or defects on the inner surface at different locations at any time through an industrial camera. Through the connection mechanism and circuit placed in the internal cylindrical grinding spindle, the grinding wheel can rotate at high speed under the drive of a high-speed motor, realizing high-speed surface grinding and ensuring grinding quality. The upper and lower feed mechanisms of the internal cylindrical grinding mechanism can gradually and precisely grind scratches under programming or manual control, and the grinding depth can be controlled with an accuracy of 0.001mm. By combining the small-range swing of the spindle with the high-speed rotation and upper and lower feed of the grinding wheel, small circumferential fan grinding can be achieved, effectively avoiding deep grooves and local over-grinding caused by point grinding, and making the ground surface smooth and continuous. Continuous grinding along the axial direction can be carried out under the control of the CNC system through programming or manual control. At this time, the spindle can always keep swinging, and the feed can achieve a one-time rapid grinding of long scratches. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic structural diagram of an external cylindrical grinding device according to a preferred embodiment of the present invention.

[0046] Figure 2 This is a schematic structural diagram of an external cylindrical grinding mechanism according to a preferred embodiment of the present invention.

[0047] Figure 3 This is a schematic structural diagram of an external cylindrical grinding mechanism according to a preferred embodiment of the present invention.

[0048] Figure 4 This is a schematic structural diagram of a clamping mechanism according to a preferred embodiment of the present invention.

[0049] Figure 5 This is a schematic structural diagram of the second supporting mechanism according to a preferred embodiment of the present invention.

[0050] Figure 6 This is a structural schematic diagram of the internal grinding mechanism described in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention. In addition, it should be understood that after reading the disclosure of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope of protection defined by the present invention.

[0052] In the description of the present invention, it should be noted that the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and do not indicate or imply relative importance.

[0053] Example 1

[0054] An internal and external cylindrical grinding device for processing pipes, comprising a frame 7, and a spindle mechanism, a first centering support mechanism 3, an external cylindrical grinding mechanism 4, a second centering support mechanism 5, and an internal cylindrical grinding mechanism 6 sequentially arranged on the frame;

[0055] The spindle mechanism includes a spindle motor 1, a spindle body 8, and a clamping mechanism 2; the clamping mechanism 2 is provided at one end of the spindle body 8 near the first centering support mechanism 3, and is used to clamp the pipe; the spindle motor 1 is connected to the spindle body 8, and is used to drive the rotation of the clamping mechanism 2 on the spindle body 8, thereby driving the rotation of the pipe;

[0056] The first centering support mechanism 3 and the second centering support mechanism 5 are used to support the pipe and ensure that the center of the pipe coincides with the center of the main shaft body 8;

[0057] The outer circle grinding mechanism 4 is used to grind the outer surface of the pipe; the inner circle grinding mechanism 6 is used to grind the inner surface of the pipe.

[0058] In a preferred embodiment of the present invention, the cylindrical grinding mechanism includes a side bed 45, a rack and pinion mechanism, an axial feed motor, a transverse feed mechanism, a transverse feed motor 44 and a cylindrical grinding unit;

[0059] The side bed 45 is driven by the axial feed motor through the gear rack mechanism and moves along the axial direction of the machine tool, and is controlled by the lateral feed motor 44 through the lateral feed mechanism and moves along the lateral direction of the machine tool.

[0060] The outer cylindrical grinding unit is arranged on one side of the side bed 45 and is used for continuously grinding the outer surface of the pipe.

[0061] In a preferred embodiment of the present invention, the external cylindrical grinding unit includes a sanding belt mounting mechanism, an external cylindrical grinding motor 43 and a dust collection trough 47; the external cylindrical grinding motor 43 drives the sanding belt mounting mechanism to rotate; the dust collection trough 47 is arranged below the sanding belt mounting mechanism to collect dust generated during the grinding process.

[0062] The sanding belt installation mechanism includes a sanding belt 41, an upper wheel, a lower wheel, a spring mechanism, a clamping device and a connecting rod 42. The upper wheel is connected to the connecting rod by bolts through the spring mechanism and the clamping device. The external cylindrical grinding motor 43 is connected to and drives the lower wheel to rotate. The lower wheel is connected to the upper wheel through the sanding belt and drives the upper wheel to rotate. The connecting rod is connected to the frame.

[0063] The inclined setting of the abrasive belt can maximize the contact area between the abrasive belt and the outer surface of the pipe, thereby increasing the grinding efficiency and facilitating dust removal. When the abrasive belt needs to be replaced, loosen the screw of the clamping device, press down the upper wheel, remove and replace the abrasive belt, and then reinstall it.

[0064] A dust collector connection port 46 is provided on one side of the dust collection tank 47. The dust collector connection port 46 is used to connect a dust collector, which is used to absorb dust from the dust collection tank 47. The dust collector is a flared, high-powered dust collector that is fixed to the outside of the machine tool, and its pipeline moves axially with the external cylindrical grinding mechanism.

[0065] In a preferred embodiment of the present invention, the internal grinding mechanism includes a tailstock 63, an axial motion mechanism 62, an axial drive motor, an up and down feed mechanism, an up and down feed drive motor, an internal grinding spindle 65, an internal grinding motor 64, a transmission mechanism and a grinding wheel 66;

[0066] The axial motion mechanism 62 is arranged on the machine frame; the axial motion mechanism 62 is connected to the tailstock 63, and the axial drive motor is connected to the axial motion mechanism 62. Driven by the axial drive motor, the axial motion mechanism 62 drives the entire internal grinding mechanism to move along the axial direction of the machine tool according to the speed and position set by the numerical control system.

[0067] The up and down feeding mechanism is arranged on the tailstock 63, and the up and down feeding driving motor is connected to the up and down feeding mechanism;

[0068] The internal grinding spindle 65 is a hollow structure with a hollow inner cavity;

[0069] The first end of the internal grinding spindle 65 is connected to the grinding wheel 66, and the second end of the internal grinding spindle 65 is connected to the up-and-down feed mechanism. The up-and-down feed mechanism is driven by the up-and-down feed motor, thereby driving the internal grinding spindle 65 and the grinding wheel 55 at the first end to move up and down according to the speed and position set by the CNC system, and the position control accuracy is better than 0.02mm.

[0070] The transmission mechanism is installed in the hollow inner cavity of the internal grinding spindle 65, and one end is connected to the grinding wheel 55, and the other end is connected to the internal grinding motor 64. It can stably transmit the high-speed rotation of the internal grinding motor 64 to the grinding wheel 55, thereby enabling the grinding wheel 55 to rotate at high speed and, driven by the upper and lower feeding mechanisms, grind the scratches on the inner surface of the pipe according to the set feed speed and position, and the grinding depth can be adjusted arbitrarily.

[0071] During internal grinding, the machine tool spindle swings at a set speed within the range of -5°~+5° to ensure a smooth transition in the grinding area.

[0072] The internal grinding mechanism includes an industrial camera 67 and a viewer. The industrial camera 67 is mounted on the front end of the grinding wheel and connected to the viewer via a circuit arranged within the hollow internal grinding spindle. This allows for observation and identification of scratched areas, as well as verification of the grinding results. The industrial camera 67 has a built-in lighting function. The grinding wheel can be a conventional grinding wheel, an emery flap wheel, or a wire drawing wheel. Emery flap wheels are preferred for grinding aluminum alloy tubes, while wire drawing wheels are preferred for polishing aluminum alloys.

[0073] In a preferred embodiment of the present invention, the clamping mechanism includes a front claw fixing body 24, a front claw 23, and a first contact block 22; the front claw fixing body 24 is disposed at the front end of the spindle body; the front claw 23 is disposed on the front claw fixing body 24, and the first contact block 22 is connected to the front claw 23; the first contact block 22 is used to clamp the pipe;

[0074] The spindle mechanism is used to fix the pipe and rotate the pipe under the drive of the spindle motor 1. The rotation can be continuous in the forward and reverse directions. The purpose of the rotation is to continuously grind the inner and outer surfaces; the rotation can also swing within the range of -5°~+5° to meet the requirements of inner surface grinding, and the swing speed is adjustable.

[0075] In a preferred embodiment of the present invention, the first centering support mechanism 3 includes a first base, a rack and pinion mechanism, a first support mechanism, and a first centering linkage mechanism; the first base can be mounted on a machine frame; the rack and pinion mechanism can be mounted below the machine frame or on the side of the machine tool;

[0076] The first base realizes the movement of the first centering support mechanism along the axial direction of the machine tool through a gear rack mechanism so as to be suitable for workpieces of different lengths;

[0077] The first support mechanism includes a first support module and a second support module, and are relatively arranged on the first base; the first support module and the second support module respectively include a support body, a moving block and a support roller, the support roller is arranged on the moving block, and the moving block is arranged on the support body; the support body is arranged on the first base and is connected to the first centering linkage mechanism; the first centering linkage mechanism drives the first support module and the second support module to move relative to each other, that is, to realize that the first support module and the second support module move toward or away from the center at the same time.

[0078] In a preferred embodiment of the present invention, the second centering support mechanism 5 includes a second base 55, a second support mechanism, and a second centering linkage mechanism 54; the second base 55 can be mounted on the frame; the second base 55 is fixedly mounted on the frame and cannot move along the axial direction of the machine tool;

[0079] The second support mechanism includes a first support module and a second support module, and is relatively arranged on a second base 55; the first support module and the second support module respectively include a support body 53, a moving block 51 and a support roller 52, the support roller 52 is arranged on the moving block 51, and the moving block 51 is arranged on the support body 53; the support body 53 is arranged on the second base 55 and is connected to the second centering linkage mechanism 54; the second centering linkage mechanism 54 drives the first support module and the second support module to move relative to each other, that is, to realize that the first support module and the second support module move toward or away from the center at the same time.

[0080] In a preferred embodiment of the present invention, the support body is provided with a ruler with an accuracy of 1 mm for determining the lateral position of the movable block, which is secured via a rack or screw. The movable block is mounted on the support body via the rack or screw. The movable block is provided with multiple support grooves for directly mounting support rollers to accommodate pipes of varying diameters. The support rollers are mounted in the support grooves of the support body via bearings and a rotating shaft.

[0081] In a preferred embodiment of the present invention, the opposing first and second support modules are connected to a first or second centering linkage mechanism, respectively, enabling simultaneous movement toward or away from the center. This synchronization simplifies centering adjustments. Using a conversion equation based on product diameter and the relative positions of the two support modules, the corresponding support module positions for products of different diameters are automatically calculated, enabling rapid installation and alignment.

[0082] The above describes the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An internal and external grinding device for processing aluminum alloy pipes, wherein: The internal and external grinding device comprises a frame, and a spindle mechanism, a first centering support mechanism, an external grinding mechanism, a second centering support mechanism and an internal grinding mechanism which are sequentially arranged on the frame; The spindle mechanism comprises a spindle motor, a spindle body and a clamping mechanism; the clamping mechanism is arranged at one end of the spindle body close to the first centering support mechanism and is used to clamp the pipe; the spindle motor is connected to the spindle body and is used to drive the rotation of the clamping mechanism on the spindle body, thereby driving the rotation of the pipe; The first centering support mechanism and the second centering support mechanism are used to support the pipe and ensure that the center of the pipe coincides with the center of the spindle body; Wherein, the first centering support mechanism includes a first base, a gear rack mechanism, a first support mechanism and a first centering linkage mechanism; the first base can be installed on the frame; the gear rack mechanism can be installed under the frame or on the side of the machine tool; The first base realizes the movement of the first centering support mechanism along the axial direction of the machine tool through a gear rack mechanism so as to be suitable for workpieces of different lengths; The first support mechanism includes a first support module and a second support module, which are relatively arranged on the first base; the first support module and the second support module respectively include a support body, a moving block and a support roller, the support roller is arranged on the moving block, and the moving block is arranged on the support body; the support body is arranged on the first base and connected to the first centering linkage mechanism; the first centering linkage mechanism drives the first support module and the second support module to move relative to each other, that is, the first support module and the second support module move toward or away from the center at the same time; The second centering support mechanism includes a second base, a second support mechanism and a second centering linkage mechanism; the second base can be mounted on the frame; the second base is fixedly mounted on the frame and cannot move along the axial direction of the machine tool; The second support mechanism includes a first support module and a second support module, which are relatively arranged on the second base; the first support module and the second support module respectively include a support body, a moving block and a support roller, the support roller is arranged on the moving block, and the moving block is arranged on the support body; the support body is arranged on the second base and connected to the second centering linkage mechanism; the second centering linkage mechanism drives the first support module and the second support module to move relative to each other, that is, the first support module and the second support module are moved toward or away from the center at the same time; The outer circle grinding mechanism is used to grind the outer surface of the pipe; the inner circle grinding mechanism is used to grind the inner surface of the pipe; Wherein, the outer cylindrical grinding mechanism comprises a side bed, a gear rack mechanism, an axial feed motor, a lateral feed mechanism, a lateral feed motor and an outer cylindrical grinding unit; The outer cylindrical grinding unit comprises an abrasive belt installation mechanism, which comprises an abrasive belt, an upper wheel, a lower wheel, a spring mechanism, a clamping device and a connecting rod; The outer cylindrical grinding unit further comprises an outer cylindrical grinding motor and a dust collecting tank; the outer cylindrical grinding motor drives the abrasive belt mounting mechanism to rotate; the dust collecting tank is arranged below the abrasive belt mounting mechanism and is used to collect dust generated during the grinding process; The upper wheel is connected to the connecting rod by bolts through a spring mechanism and a clamping device, the outer cylindrical grinding motor is connected to and drives the lower wheel to rotate, the lower wheel is connected to the upper wheel through a sanding belt and drives the upper wheel to rotate, the connecting rod is connected to the frame; the sanding belt is arranged obliquely; The internal grinding mechanism includes a tailstock, an axial motion mechanism, an axial drive motor, an upper and lower feed mechanism, an upper and lower feed drive motor, an internal grinding spindle, an internal grinding motor, a transmission mechanism and a grinding wheel. The inner circle grinding spindle is a hollow structure with a hollow inner cavity, and the transmission mechanism is installed in the hollow inner cavity of the inner circle grinding spindle; The axial motion mechanism is arranged on the frame; the axial motion mechanism is connected to the tailstock, the axial drive motor is connected to the axial motion mechanism, and the axial motion mechanism is driven by the axial drive motor to drive the entire internal grinding mechanism to move along the axial direction of the machine tool according to the speed and position set by the numerical control system; The up-down feeding mechanism is arranged on the tailstock, and the up-down feeding driving motor is connected to the up-down feeding mechanism; The first end of the internal grinding spindle is connected to the grinding wheel, and the second end of the internal grinding spindle is connected to the upper and lower feeding mechanism. The upper and lower feeding mechanism is driven by the upper and lower feeding motor, thereby driving the internal grinding spindle and the grinding wheel at the first end to move up and down according to the speed and position set by the numerical control system, and the position control accuracy is better than 0.02mm; One end of the transmission mechanism is connected to the grinding wheel, and the other end is connected to the internal grinding motor, which can stably transmit the high-speed rotation of the internal grinding motor to the grinding wheel, thereby enabling the grinding wheel to rotate at high speed, and under the drive of the upper and lower feeding mechanisms, the scratches on the inner surface of the pipe are ground according to the set feed speed and position, and the grinding depth can be adjusted arbitrarily.

2. The device according to claim 1, wherein: The side bed is driven by an axial feed motor through a gear rack mechanism and moves in the axial direction of the machine tool, and is controlled by a lateral feed motor through a lateral feed mechanism and moves in the lateral direction of the machine tool; The outer cylindrical grinding unit is arranged on one side of the side bed and is used for continuously grinding the outer surface of the pipe.

3. The device according to claim 1, wherein: A dust collector connection port is arranged at one side of the dust collecting tank, and the dust collector connection port is used to connect a dust collector, and the dust collector is used to absorb dust in the dust collecting tank.

4. The device according to claim 3, wherein: The vacuum cleaner is a flared high-power vacuum cleaner, which is fixed on the outside of the machine tool, and its pipeline moves axially along with the external cylindrical grinding mechanism.

5. The device according to claim 1, wherein: When grinding the inner circle, the machine tool spindle swings at a set speed within the range of -5°~+5° to ensure a smooth transition in the grinding area.

6. The device according to claim 1, wherein: The internal grinding mechanism also includes an industrial camera and an observer. The industrial camera is installed at the front end of the grinding wheel and is connected to the observer through a line arranged in the hollow internal grinding spindle. It is used to observe and determine the scratch area and verify the grinding effect.

7. The device according to claim 6, wherein: The industrial camera has a built-in lighting function.

8. The device according to any one of claims 1 to 4, wherein: The clamping mechanism includes a front clamping claw fixing body, a front clamping claw, and a first contact block; the front clamping claw fixing body is arranged at the front end of the main shaft body; the front clamping claw is arranged on the front clamping claw fixing body, and the first contact block is connected to the front clamping claw; the first contact block is used to clamp the pipe.

9. The device according to any one of claims 1 to 4, wherein: The spindle mechanism is used to fix the pipe and rotate the pipe driven by the spindle motor. The rotation is continuous in forward and reverse directions. The purpose of the rotation is to continuously grind the inner and outer surfaces; or the rotation swings within the range of -5°~+5° to meet the inner surface grinding requirements, and the swing speed is adjustable.

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