CN-122008011-A - Tubular workpiece inner wall grinding equipment

CN122008011ACN 122008011 ACN122008011 ACN 122008011ACN-122008011-A

Abstract

The invention provides tubular workpiece inner wall grinding equipment which comprises a plurality of groups of workpiece fixing components, a rotating disc, a rotary driving mechanism, a connecting rod component, a supporting frame and an abrasive, wherein the workpiece fixing components are used for fixing tubular workpieces, the rotating disc is provided with the plurality of groups of workpiece fixing components, the rotary driving mechanism is used for driving the rotating disc to rotate by 360 degrees, the connecting rod component comprises a connecting rod driving mechanism and a rocker arm, the rotating disc is fixed on the rocker arm, the connecting rod driving mechanism is used for driving the rocker arm to swing reciprocally within a range of +/-45 degrees, and the connecting rod driving mechanism and the rocker arm are both arranged on the supporting frame. The invention fills the abrasive in the workpiece, and the connecting rod driving mechanism and the rotary driving mechanism are matched to enable the workpiece to rotate and swing, so that the abrasive regularly flows in the workpiece and grinds the inner wall, and the inner wall of the workpiece is automatically grinded and polished, thereby being particularly suitable for the inner wall of a pipe fitting with a complex inner cavity structure or higher surface quality requirement.

Inventors

TIAN HANGHANG
PAN HAOXING
LI JUNFENG

Assignees

上海云铸三维科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260210

Claims (10)

1. A tubular workpiece inner wall grinding apparatus, comprising: a plurality of sets of workpiece securing assemblies configured to secure tubular workpieces; the rotating disc is provided with a plurality of groups of workpiece fixing assemblies; A rotation driving mechanism configured to drive the rotating disk to rotate by 360 degrees; a link assembly including a link driving mechanism and a swing arm, the rotating disc being fixed to the swing arm, the link driving mechanism being configured to drive the swing arm to swing reciprocally; The connecting rod driving mechanism and the rocker arm are both arranged on the supporting frame; The tubular workpiece filled with the abrasive is fixed on the workpiece fixing assembly, the connecting rod driving mechanism drives the rocker arm to swing in a reciprocating mode, and the rotary driving structure drives the rotary disc to rotate 360 degrees, so that the abrasive in the tubular workpiece regularly flows in the tubular workpiece and grinds the inner wall of the tubular workpiece.
2. The tubular workpiece inner wall grinding apparatus according to claim 1, wherein the link driving mechanism comprises a telescopic unit and a support rod, the support rod is fixedly mounted on the support frame, a fixed end of the telescopic unit is rotatably connected with the support rod, and a telescopic end of the telescopic unit is rotatably connected with the rocker arm.
3. A tubular workpiece inner wall grinding apparatus according to claim 1 or 2, wherein the rocker arm is rotatably connected to the support frame via a bearing housing.
4. The tubular workpiece inner wall grinding apparatus according to claim 1, wherein the rotary driving mechanism is fixed on the rocker arm, the rotary driving mechanism includes a rotary motor, a speed reducer, and a connection flange, an output shaft of the rotary motor is connected with an input end of the speed reducer, and an output end of the speed reducer is connected with the rotating disk through the connection flange.
5. The apparatus for grinding an inner wall of a tubular workpiece according to claim 1, wherein the workpiece fixing assembly is a tube clamping assembly, the tube clamping assembly including a tube clamp into which a tubular workpiece extends and a lock nut for fixing the tube clamp so that the tube clamp clamps the tubular workpiece.
6. The tubular workpiece inner wall grinding apparatus of claim 5, wherein the tube clamping assembly further comprises a tube jacket, the tube jacket being sleeved over the tube clamp.
7. The tubular workpiece inner wall grinding apparatus of claim 1, further comprising a receiving tray positioned below the rotating tray for collecting scattered abrasive.
8. The tubular workpiece inner wall grinding apparatus of claim 1, further comprising a protective housing having a transparent window thereon.
9. The tubular workpiece inner wall grinding apparatus of claim 8, further comprising a control system electrically connected to the link drive mechanism, the rotary drive mechanism, respectively, and an operating interface comprising a touch screen and a button assembly mounted on the protective housing.
10. The tubular workpiece inner wall grinding apparatus of claim 9, wherein a torque sensor is provided on the rotating disc, the torque sensor monitors the load of the rotating disc in real time during the grinding process, and the torque sensor is electrically connected with the control system.

Description

Tubular workpiece inner wall grinding equipment Technical Field The invention belongs to the technical field of grinding of inner walls of tubular workpieces, and particularly relates to a device for grinding the inner walls of tubular workpieces, in particular to a device for grinding the inner walls of tubular workpieces formed by SLM (selective laser melting) metal 3D printing. Background After the SLM metal 3D printing equipment finishes printing, the inner wall of the formed metal pipe fitting often has the defects of unmelted particles, spheroidization, micro-droplet adhesion, uneven surface formed by interlayer superposition and the like. These defects not only seriously affect the surface finish and dimensional accuracy of the pipe fitting, but also can cause vortex generation and increase resistance when fluid flows in the pipe, and even become hidden dangers for causing fatigue failure or biocompatibility problems in the fields of medical treatment, aerospace and the like with extremely high requirements on cleanliness and mechanical properties. The traditional inner wall grinding mode mainly depends on manual operation, an operator holds a grinding tool to extend into the pipe for grinding, the mode is high in labor intensity and low in efficiency, grinding quality is high depending on experience of the operator, uniformity and stability of a grinding effect are difficult to ensure, and the problem that the tool is difficult to reach, a grinding blind area is more difficult to reach and the like when the manual grinding mode is used for particularly the pipe with small inner diameter, long length or complex inner cavity structures such as bending and reducing is faced. In addition, the part of automatic grinding equipment is designed for regular-shaped pipe fittings, the flexibility of the motion freedom degree and the process parameter adjustment is insufficient, and the equipment cannot adapt to the diversified inner cavity structures and the differentiated surface treatment requirements of SLM metal 3D printing pipe fittings, so that the grinding effect is poor or the equipment universality is poor. Therefore, research and development can adapt to SLM metal 3D and print the special device that the pipe fitting inner wall characteristic, realize automatic accurate grinding, have important meaning to promoting the aftertreatment quality and the efficiency of 3D printing metal product. Disclosure of Invention In view of the above, the invention provides a tubular workpiece inner wall grinding device, which fills an abrasive in a workpiece, and utilizes the cooperation of a connecting rod driving mechanism and a rotary driving mechanism to enable the workpiece to rotate and swing, so that the abrasive regularly flows in the workpiece and grinds the inner wall, thereby automatically grinding and polishing the inner wall of the workpiece, and being particularly suitable for inner walls of pipes with complex inner cavity structures or higher surface quality requirements. In order to achieve the above purpose, the technical scheme of the invention is as follows: A tubular workpiece inner wall grinding apparatus comprising: a plurality of sets of workpiece securing assemblies configured to secure tubular workpieces; the rotating disc is provided with a plurality of groups of workpiece fixing assemblies; A rotation driving mechanism configured to drive the rotating disk to rotate by 360 degrees; a link assembly including a link driving mechanism and a swing arm, the rotating disc being fixed to the swing arm, the link driving mechanism being configured to drive the swing arm to swing reciprocally; The connecting rod driving mechanism and the rocker arm are both arranged on the supporting frame; The tubular workpiece filled with the abrasive is fixed on the workpiece fixing assembly, the connecting rod driving mechanism drives the rocker arm to swing in a reciprocating mode, and the rotary driving structure drives the rotary disc to rotate 360 degrees, so that the abrasive in the tubular workpiece regularly flows in the tubular workpiece and grinds the inner wall of the tubular workpiece. According to a preferred embodiment of the invention, the connecting rod driving mechanism comprises a telescopic unit and a supporting rod, wherein the supporting rod is fixedly arranged on the supporting frame, the fixed end of the telescopic unit is rotationally connected with the supporting rod, and the telescopic end of the telescopic unit is rotationally connected with the rocker arm. In a preferred embodiment of the invention, the rocker arm is rotatably connected with the support frame through a bearing seat. According to a preferred embodiment of the invention, the rotary driving mechanism is fixed on the rocker arm and comprises a rotary motor, a speed reducer and a connecting flange, wherein an output shaft of the rotary motor is connected with an input end of the speed reducer, and an output end of the speed