A device for precision machining of splines by abrasive flow

Abstract

The invention provides a device for precision machining splines of abrasive flow, comprising a workpiece centering clamping device, an abrasive flow inlet pipe centering clamping device, and a shell fixing device. During machining, the clamping screws are first tightened, and three six-bar mechanisms fix the clamping slide blocks and simultaneously approach the workpiece to position and center the workpiece. Secondly, according to the diameter of the workpiece surface to be machined, the diameter of the circular motion of the abrasive flow inlet pipe centering clamping device is adjusted, and then the abrasive flow inlet pipe centering clamping push rod is screwed clockwise, and the left V-shaped block and the right V-shaped block simultaneously approach the abrasive flow inlet pipe to position and center the abrasive flow inlet pipe. Finally, the motor is turned on, and the abrasive flow inlet pipe performs a circular motion along the surface to be machined. When the machining is completed, only the clamping screws need to be loosened and the quick-change pad block removed, and the six-bar mechanism pull rod can be moved upwards. The three six-bar mechanisms fix the clamping slide blocks and simultaneously stay away from the workpiece, and then the workpiece can be replaced. The device is simple and convenient for disassembling and assembling workpieces, and splines of different sizes can be machined.

Description

Technical Field

[0001] The invention relates to the technical field of abrasive flow machining, in particular to a device for precision machining splines with abrasive flow. Background Art

[0002] Compared with flat key connection, spline connection has the advantages of more uniform force, greater load bearing, good alignment and guidance between parts on the shaft and the shaft. The spline manufacturing process is more complicated, sometimes requiring special equipment and high cost. It is suitable for connections with high centering accuracy, large torque transmission or frequent slippage. The surface quality of the spline will affect the performance of the spline connection. When there are burrs, it is not smooth enough or there are residual contaminants on the spline surface, it will affect the alignment and guidance of the spline connection.

[0003] Abrasive flow machining is a new type of machining method that uses abrasive media to flow under pressure over the surface of the workpiece to be machined, remove burrs, remove flash, and round corners to reduce the waviness and roughness of the workpiece surface and achieve precision machining finish. Abrasive flow machining is the best choice for workpieces that require complex manual finishing or complex shapes, as well as parts that are difficult to machine with other methods. Summary of the invention

[0004] The invention provides a device for precision machining splines using abrasive flow to reduce the waviness and roughness of the inner surface of a workpiece and achieve the finish of precision machining.

[0005] The invention provides a device for precision machining splines by abrasive flow, which comprises a workpiece centering and clamping device, an abrasive flow inlet pipe centering and clamping device, and a shell fixing device.

[0006] Further, as a preferred embodiment, the workpiece centering clamping device is composed of a six-bar mechanism, three six-bar mechanism support legs, a recovery bucket, a quick-change pad, and a clamping screw. The six-bar mechanism is composed of a six-bar mechanism bottom plate, three six-bar mechanism side plates, three six-bar mechanism bases, three six-bar mechanism first connecting rods, three six-bar mechanism second connecting rods, three six-bar mechanism third connecting rods, a six-bar mechanism upper plate, three six-bar mechanism fixed clamping sliders, and a six-bar mechanism pull rod. The abrasive flow inlet pipe centering clamping device is composed of an abrasive flow inlet pipe centering clamping upper cover, an abrasive flow inlet pipe centering clamping bottom plate, a left V-shaped block, a right V-shaped block, an abrasive flow inlet pipe centering clamping slider, and an abrasive flow inlet pipe centering clamping push rod. The housing fixing device is composed of a four-bar mechanism, a small gear, and a motor. The four-bar mechanism is composed of a bottom plate, a left side plate, a first circular connecting rod, a cross bar, a second circular connecting rod, and a large gear.

[0007] Further, as a preference, the six-bar mechanism bottom plate includes a six-bar mechanism bottom plate center portion and three evenly distributed six-bar mechanism bottom plate edge portions connected to the six-bar mechanism bottom plate center portion, the edges of the six-bar mechanism bottom plate edge portions are all provided with countersunk holes and pin holes, the lower ends of the six-bar mechanism side plates are provided with threaded holes and pin holes, the three six-bar mechanism side plates are fixedly connected to the three six-bar mechanism bottom plate edge portions by screws and pins, the six-bar mechanism upper plate includes a six-bar mechanism upper plate center portion and three evenly distributed six-bar mechanism upper plate edge portions connected to the six-bar mechanism upper plate center portion, the edges of the six-bar mechanism upper plate edge portions are all provided with countersunk holes and pin holes, the upper ends of the six-bar mechanism side plates are provided with threaded holes and pin holes, The edge portions of the three six-bar mechanism upper plates are fixedly connected to the upper ends of the three six-bar mechanism side plates by screws and pins, the side surfaces of the six-bar mechanism side plates are provided with countersunk holes, the bottom surface of the six-bar mechanism base is provided with threaded holes, the three six-bar mechanism bases are fixedly connected to the side surfaces of the three six-bar mechanism side plates by screws, the central portion of the six-bar mechanism bottom plate is provided with a slide rail, the side surfaces of the six-bar mechanism pull rods are provided with six-bar mechanism pull rod side sliders, the central portion of the six-bar mechanism bottom plate and the six-bar mechanism pull rods form a moving pair, the six-bar mechanism pull rods can move in a direction perpendicular to the upper end surface of the six-bar mechanism bottom plate, and three evenly distributed connecting blocks are provided on the upper end surface of the six-bar mechanism pull rods, each of the connecting blocks is connected to each of the six-bar mechanism The lower ends of the two connecting rods form a rotating pair, and the base of each six-bar mechanism and the lower end of the first connecting rod of each six-bar mechanism form a rotating pair. The upper end of the first connecting rod of each six-bar mechanism, the upper end of the second connecting rod of each six-bar mechanism, and the lower end of the third connecting rod of each six-bar mechanism form a rotating pair. The upper end of the third connecting rod of each six-bar mechanism and the lower end of each fixed clamping slider of each six-bar mechanism form a rotating pair. The side of the fixed clamping slider of the six-bar mechanism is provided with a slide rail groove, and the edge of the upper plate of each six-bar mechanism is provided with a slide rail. The fixed clamping slider of each six-bar mechanism and the edge of the upper plate of each six-bar mechanism form a moving pair. Each fixed clamping slider of the six-bar mechanism can be on the upper plate of the six-bar mechanism The upper end surface moves in the plane where the upper end surface is located along the direction toward and away from the center of the upper plate of the six-bar mechanism, the upper end surface of the six-bar mechanism fixed clamping slider is parallel to the upper end surface of the six-bar mechanism upper plate, the lower end surface of the six-bar mechanism pull rod is provided with a threaded hole, the upper end of the clamping screw is installed in the threaded hole of the lower end surface of the six-bar mechanism pull rod, the side of the quick-change pad is provided with a notch, the quick-change pad can be installed between the lower end surface of the six-bar mechanism bottom plate and the clamping screw through the notch and can be removed from the lower end surface of the six-bar mechanism bottom plate and the clamping screw, the edge portions of the three six-bar mechanism bottom plates are fixedly connected with three six-bar mechanism support legs, the center portion of the six-bar mechanism upper plate is provided with a recovery bucket mating hole, and the recovery bucket is fixedly connected to the edge portion of the recovery bucket mating hole.

[0008] Furthermore, as a preference, when the quick-change pad is installed between the lower end surface of the six-bar mechanism base plate and the clamping screw, the clamping screw is tightened, the six-bar mechanism pull rod will move downward, and at the same time, the three six-bar mechanism fixed clamping slide blocks will simultaneously move toward the center of the six-bar mechanism upper plate, so as to clamp the workpiece. When the workpiece is clamped, the axis of the workpiece is perpendicular to the upper end surface of the six-bar mechanism upper plate and passes through the center of the six-bar mechanism upper plate. When the diameter of the workpiece is changed, the axis of the workpiece still passes through the center of the six-bar mechanism upper plate, thereby playing a role in centering and clamping the workpiece. When the clamping screw is loosened and the quick-change pad is removed from between the lower end surface of the six-bar mechanism base plate and the clamping screw, the six-bar mechanism pull rod is moved upward, and the three six-bar mechanism fixed clamping slide blocks will simultaneously move away from the center of the six-bar mechanism upper plate, so that the workpiece can be replaced.

[0009] Further, as a preference, the abrasive flow inlet tube centering clamping base plate includes the bottom surface of the abrasive flow inlet tube centering clamping base plate and the side surface of the abrasive flow inlet tube centering clamping base plate, the upper end surface of the bottom surface of the abrasive flow inlet tube centering clamping base plate is provided with a first slide rail groove, the direction of which is perpendicular to the side surface of the abrasive flow inlet tube centering clamping base plate, the lower end surface of the abrasive flow inlet tube centering clamping slider is provided with a first slide rail, the first slide rail and the first slide rail groove form a moving pair, so that the abrasive flow inlet tube centering clamping slider moves in a direction perpendicular to the side surface of the abrasive flow inlet tube centering clamping base plate, the upper end surface of the abrasive flow inlet tube centering clamping slider is provided with a second slide rail and a third slide rail, the lower end surface of the left V-shaped block is provided with a second slide rail groove, and the lower end surface of the right V-shaped block is provided with a third slide rail groove The second slide rail and the second slide rail groove form a moving pair, the third slide rail and the third slide rail groove form a moving pair, the upper end surface of the left V-shaped block is provided with a fourth slide rail, the upper end surface of the right V-shaped block is provided with a fifth slide rail, the abrasive flow inlet pipe centering clamping upper cover is provided with a fourth slide rail groove and a fifth slide rail groove, the fourth slide rail and the fourth slide rail groove form a moving pair, the fifth slide rail and the fifth slide rail groove form a moving pair, the abrasive flow inlet pipe centering clamping upper cover is fixedly connected to the side surface of the abrasive flow inlet pipe centering clamping bottom plate, the side surface of the abrasive flow inlet pipe centering clamping bottom plate is provided with a threaded hole, the axis of which is perpendicular to the side surface of the abrasive flow inlet pipe centering clamping bottom plate, the abrasive flow inlet pipe centering clamping push rod is cooperated and installed in the threaded hole on the side surface of the abrasive flow inlet pipe centering clamping bottom plate.

[0010] Further, as a preference, turning the abrasive flow inlet tube centering clamping push rod clockwise will cause the abrasive flow inlet tube centering clamping slider to move in a direction perpendicular to and away from the side of the abrasive flow inlet tube centering clamping base plate, and at the same time, the left V-shaped block and the right V-shaped block simultaneously move in a direction parallel to the side of the abrasive flow inlet tube centering clamping base plate toward the center of the abrasive flow inlet tube centering clamping upper cover, so as to position and clamp the abrasive flow inlet tube, and turning the abrasive flow inlet tube centering clamping push rod counterclockwise will cause the abrasive flow inlet tube centering clamping slider to move in a direction perpendicular to and close to the side of the abrasive flow inlet tube centering clamping base plate, and at the same time, the left V-shaped block and the right V-shaped block simultaneously move in a direction parallel to the side of the abrasive flow inlet tube centering clamping base plate toward the center of the abrasive flow inlet tube centering clamping upper cover, so as to loosen the abrasive flow inlet tube and replace it.

[0011] Further, as preferably, the right side plate includes a bottom surface of the right side plate and a side surface of the right side plate, the edge portion of the bottom plate is provided with a countersunk hole and a pin hole, the lower end surface of the left side plate is provided with a threaded hole and a pin hole, which are fixedly connected to the corresponding countersunk holes and pin holes at the edge of the bottom plate by screws and pins, the lower end surface of the side surface of the right side plate is provided with a threaded hole and a pin hole, and is fixedly connected to the corresponding countersunk holes and pin holes at the edge of the bottom plate by screws and pins, the upper end surface of the left side plate is provided with a first matching hole, and the bottom surface of the right side plate is provided with a second matching hole and a third matching hole, the first matching hole, the second matching hole, and the third matching hole are on the same straight line, the first matching hole and the first circular connecting rod axis form a rotating pair, the second matching hole and the second circular connecting rod axis form a rotating pair, the third matching hole and the large gear axis form a rotating pair, the upper end surface of the first circular connecting rod is provided with through holes with different distances to the axis, and the second circular connecting rod The upper end face of the rod is provided with through holes with different distances to the axis, the upper end face of the large gear is provided with through holes with different distances to the axis, the lower end face of the cross bar is provided with a first circular connecting rod mating hole, a second circular connecting rod mating hole and a large gear mating hole, the first circular connecting rod mating hole and the through hole provided on the upper end face of the first circular connecting rod form a rotating pair, the second circular connecting rod mating hole and the through hole provided on the upper end face of the second circular connecting rod form a rotating pair, the large gear mating hole and the through hole provided on the upper end face of the large gear form a rotating pair, the distance from the first circular connecting rod mating hole to the axis of the first circular connecting rod is equal to the distance from the second circular connecting rod mating hole to the axis of the second circular connecting rod is equal to the distance from the large gear mating hole to the axis of the large gear, the motor is fixedly connected to the bottom face of the right side plate, the motor is fixedly connected with a pinion, the pinion is meshed with the large gear, and the cross bar is provided with a mating hole for the centering clamping device of the abrasive inlet pipe.

[0012] Further, as a preference, the motor drives the small gear to rotate, and the small gear drives the large gear to rotate, so that the first circular connecting rod mating hole makes a circular motion around the axis of the first circular connecting rod, the second circular connecting rod mating hole makes a circular motion around the axis of the second circular connecting rod, and the large gear mating hole makes a circular motion around the axis of the large gear, so that the abrasive flow inlet pipe centering clamping device mating hole makes a circular motion around the center of the base plate, and by changing the first circular connecting rod mating hole and the different through holes set on the upper end face of the first circular connecting rod to form a rotating pair, changing the second circular connecting rod mating hole and the different through holes set on the upper end face of the second circular connecting rod to form a rotating pair, changing the large gear mating hole and the different through holes set on the upper end face of the large gear to form a rotating pair, thereby changing the diameter of the abrasive flow inlet pipe centering clamping device mating hole making a circular motion around the center of the base plate.

[0013] Further, as a preference, pin holes and threaded holes are provided on the base plate, and pin holes and countersunk holes are provided on the lower end surfaces of the three six-bar mechanism support legs, which are positioned and connected to the corresponding pin holes and threaded holes on the base plate by pins and screws to ensure that the center of the six-bar mechanism base plate and the center of the base plate are on a vertical line.

[0014] Furthermore, as a preference, the upper end face of the cross bar is provided with a mating hole for a centering clamping device for an abrasive flow inlet pipe, the upper end face of the cross bar is provided with a pin hole and a threaded hole, the lower end face of the centering clamping base plate for the abrasive flow inlet pipe is provided with a countersunk hole and a pin hole, which are positioned and connected to the corresponding pin holes and threaded holes on the cross bar by pins and screws to ensure that the mating holes of the abrasive flow inlet pipe and the centering clamping device for the abrasive flow inlet pipe are coaxial. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall assembly of the equipment for processing splines;

[0016] Figure 2 It is a schematic diagram of the assembly of the workpiece centering and clamping device;

[0017] Figure 3 A schematic diagram of the assembly of the centering clamping device for the abrasive inlet pipe;

[0018] Figure 4 is a schematic diagram of an assembly of a housing fixing device;

[0019] Figure 5 is a schematic diagram of the base plate;

[0020] Figure 6 Schematic diagram of the six-bar mechanism supporting legs;

[0021] Figure 7 It is a schematic diagram of the base plate of the six-bar mechanism;

[0022] Figure 8It is a schematic diagram of the side plate of the six-bar mechanism;

[0023] Fig. 9 It is a schematic diagram of the base of the six-bar mechanism;

[0024] Fig.10 is a schematic diagram of the first connecting rod of the six-bar mechanism;

[0025] Fig.11 is a schematic diagram of the second connecting rod of the six-bar mechanism;

[0026] Fig.12 It is a schematic diagram of the third connecting rod of the six-bar mechanism;

[0027] Fig.13 It is a schematic diagram of the upper plate of the six-bar mechanism;

[0028] Fig.14 It is the schematic diagram of the left panel;

[0029] Fig.15 is a schematic diagram of a first circular connecting rod;

[0030] Fig.16 It is a schematic diagram of the six-bar mechanism fixing the clamping slide block;

[0031] Fig.17 is a schematic diagram of the crossbar;

[0032] Fig.18 Schematic diagram of centering and clamping the upper cover of the abrasive inlet pipe;

[0033] Fig.19 Schematic diagram of the clamping base plate for centering the abrasive flow inlet pipe;

[0034] Fig. 20 is a schematic diagram of a second circular connecting rod;

[0035] Fig.21 This is a schematic diagram of a large gear;

[0036] Fig. 22 is a schematic diagram of a pinion;

[0037] Fig.23 This is a schematic diagram of a recycling bin;

[0038] Fig.24 It is a schematic diagram of the tie rod of the six-bar mechanism;

[0039] Fig.25 This is a schematic diagram of the quick-change pad;

[0040] Fig.26 Schematic diagram of the clamping screw;

[0041] Fig. 27 This is a schematic diagram of the right side panel;

[0042] Fig.28 It is a schematic diagram of the left V-shaped block;

[0043] Fig.29 It is a schematic diagram of the right V-shaped block;

[0044] Fig.30 Schematic diagram of the centering and clamping slider of the abrasive flow inlet pipe;

[0045] Fig.31 Schematic diagram of the centering and clamping push rod for the abrasive flow inlet pipe.

[0046] In the figure: 1, bottom plate, 2, six-bar mechanism support leg, 3, six-bar mechanism bottom plate, 3-1, six-bar mechanism bottom plate center, 3-1, six-bar mechanism bottom plate edge, 4, six-bar mechanism side plate, 5, six-bar mechanism base, 6, six-bar mechanism first connecting rod, 7, six-bar mechanism second connecting rod, 8, six-bar mechanism third connecting rod, 9, six-bar mechanism upper plate, 9-1, six-bar mechanism upper plate center, 9-2, six-bar mechanism upper plate edge, 9-3, recycling bucket matching hole, 10 , left side plate, 10-1, first matching hole, 11, first circular connecting rod, 12, six-bar mechanism fixed clamping slider, 13, cross bar, 13-1, first circular connecting rod matching hole, 13-2, second circular connecting rod matching hole, 13-3, large gear matching hole, 14, abrasive flow inlet pipe centering clamping upper cover, 14-1, fourth slide rail groove, 14-2, fifth slide rail groove, 15, abrasive flow inlet pipe, 16, abrasive flow inlet pipe centering clamping bottom plate, 16-1, The bottom surface of the abrasive flow inlet pipe centering clamping base plate, 16-2, the side surface of the abrasive flow inlet pipe centering clamping base plate, 16-3, the first slide rail groove, 17, the second circular connecting rod, 18, the large gear, 19, the small gear, 20, the motor, 21, the recycling barrel, 22, the six-bar mechanism pull rod, 22-1, the side slider of the six-bar mechanism pull rod, 22-2, the connecting block, 23, the quick-change pad, 23-1, the notch, 24, the clamping screw, 25, the right side plate, 25-1, the right side plate Bottom surface, 25-2, right side plate side, 25-3 second matching hole, 25-4 third matching hole, 26, spline, 27, left V-shaped block, 27-1, second slide rail groove, 27-2, fourth slide rail, 28, right V-shaped block, 28-1, third slide rail groove, 28-2, fifth slide rail, 29, abrasive flow inlet pipe centering clamping slider, 29-1, first slide rail, 29-2, second slide rail, 29-3, third slide rail, 30, abrasive flow inlet pipe centering clamping push rod. DETAILED DESCRIPTION

[0047] The present invention provides a device for abrasive flow precision machining of splines. The technical scheme in the embodiments of the present invention is clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the protection scope of the present invention.

[0048] The present invention comprises a workpiece centering clamping device, an abrasive flow inlet pipe centering clamping device, and a shell fixing device. The workpiece centering clamping device is composed of a six-bar mechanism, three six-bar mechanism support legs (2), a recovery bucket (21), a quick-change pad (23), and a clamping screw (24). The six-bar mechanism is composed of a six-bar mechanism bottom plate (3), three six-bar mechanism side plates (4), three six-bar mechanism bases (5), three six-bar mechanism first connecting rods (6), three six-bar mechanism second connecting rods (7), three six-bar mechanism third connecting rods (8), a six-bar mechanism upper plate (9), three six-bar mechanism fixed clamping slide blocks (12), and a six-bar mechanism pull rod (22). The abrasive flow inlet pipe centering clamping device is composed of an abrasive flow inlet pipe centering clamping upper cover (14), an abrasive flow The inlet pipe centering clamping base plate (16), a left V-shaped block (27), a right V-shaped block (28), an abrasive flow inlet pipe centering clamping slide block (29), and an abrasive flow inlet pipe centering clamping push rod (30) are composed of the housing fixing device consisting of a four-bar mechanism, a small gear (19), and a motor (20); the four-bar mechanism consists of a base plate (1), a left side plate (10), a first circular connecting rod (11), a cross rod (13), a second circular connecting rod (17), and a large gear (18).

[0049] The six-bar mechanism bottom plate (3) comprises a six-bar mechanism bottom plate central portion (3-1) and three evenly distributed six-bar mechanism bottom plate edge portions (3-2) connected to the six-bar mechanism bottom plate central portion (3-1), the edges of the six-bar mechanism bottom plate edge portions (3-2) are all provided with countersunk holes and pin holes, the lower ends of the six-bar mechanism side plates (4) are provided with threaded holes and pin holes, the three six-bar mechanism side plates (4) are fixedly connected to the three six-bar mechanism bottom plate edge portions (3-2) by screws and pins, the six-bar mechanism upper plate (9) comprises a six-bar mechanism upper plate central portion (9-1) and three evenly distributed six-bar mechanism upper plate edge portions (9-2) connected to the six-bar mechanism upper plate central portion (9-1), the six-bar mechanism upper plate edge portions (9-2) are The edges of the edge portion (9-2) are provided with countersunk holes and pin holes, the upper ends of the six-bar mechanism side plates (4) are provided with threaded holes and pin holes, the three six-bar mechanism upper plate edge portions (9-2) are fixedly connected to the upper ends of the three six-bar mechanism side plates (4) by screws and pins, the side surfaces of the six-bar mechanism side plates (4) are provided with countersunk holes, the bottom surface of the six-bar mechanism base (5) is provided with threaded holes, the three six-bar mechanism bases (5) are fixedly connected to the side surfaces of the three six-bar mechanism side plates (4) by screws, the center portion (3-1) of the six-bar mechanism bottom plate is provided with a slide rail, the side surfaces of the six-bar mechanism pull rod (22) are provided with a six-bar mechanism pull rod side slider (22-1), the center portion (3-1) of the six-bar mechanism bottom plate is connected to the six-bar mechanism The mechanism rod (22) forms a moving pair, the six-bar mechanism rod (22) can move in a direction perpendicular to the upper end surface of the six-bar mechanism base plate (3), three evenly distributed connecting blocks (22-2) are arranged on the upper end surface of the six-bar mechanism rod (22), each connecting block (22-2) and the lower end of each six-bar mechanism second connecting rod (7) form a rotating pair, each six-bar mechanism base (5) and the lower end of each six-bar mechanism first connecting rod (6) form a rotating pair, the upper end of each six-bar mechanism first connecting rod (6) and the upper end of each six-bar mechanism second connecting rod (7) and the lower end of each six-bar mechanism third connecting rod (8) form a rotating pair, and each six-bar mechanism third connecting rod (8) The upper end of the six-bar mechanism and the lower end of each six-bar mechanism fixed clamping slider (12) form a rotating pair, the side of the six-bar mechanism fixed clamping slider (12) is provided with a slide rail groove, the edge portion (9-2) of each six-bar mechanism upper plate is provided with a slide rail, each six-bar mechanism fixed clamping slider (12) and each six-bar mechanism upper plate edge portion (9-2) form a moving pair, each six-bar mechanism fixed clamping slider (12) can move in the plane where the upper end surface of the six-bar mechanism upper plate (9) is located along the direction toward and away from the center of the six-bar mechanism upper plate (9), the upper end surface of the six-bar mechanism fixed clamping slider (12) is parallel to the upper end surface of the six-bar mechanism upper plate (9), and the lower end surface of the six-bar mechanism pull rod (22) is provided with a threaded hole.The upper end of the clamping screw (24) is installed in the threaded hole of the lower end surface of the six-bar mechanism pull rod (22), and the side of the quick-change pad (23) is provided with a notch (23-1). The quick-change pad (23) can be installed between the lower end surface of the six-bar mechanism bottom plate (3) and the clamping screw (24) through the notch (23-1) and can be removed from between the lower end surface of the six-bar mechanism bottom plate (3) and the clamping screw (24). The three six-bar mechanism bottom plate edge portions (3-2) are fixedly connected with three six-bar mechanism support legs (2), and the central portion (9-1) of the six-bar mechanism upper plate is provided with a recovery bucket matching hole (9-3), and the recovery bucket (21) is fixedly connected to the edge portion of the recovery bucket matching hole (9-3).

[0050] When the quick-change pad (23) is installed between the lower end surface of the six-bar mechanism bottom plate (3) and the clamping screw (24), the clamping screw (24) is tightened, the six-bar mechanism pull rod (22) will move downward, and at the same time, the three six-bar mechanism fixed clamping slide blocks (12) will simultaneously move toward the center of the six-bar mechanism upper plate (9), so as to clamp the workpiece. When the workpiece is clamped, the axis of the workpiece is perpendicular to the upper end surface of the six-bar mechanism upper plate (9) and passes through the center of the six-bar mechanism upper plate (9). When the diameter of the workpiece is changed, the axis of the workpiece still passes through the center of the six-bar mechanism upper plate (9), which plays a role in centering and clamping the workpiece. When the clamping screw (24) is loosened and the quick-change pad (23) is removed from between the lower end surface of the six-bar mechanism bottom plate (3) and the clamping screw (24), the six-bar mechanism pull rod (22) is moved upward, and the three six-bar mechanism fixed clamping slide blocks (12) will simultaneously move in a direction away from the center of the six-bar mechanism upper plate (9), and the workpiece can be replaced.

[0051] The abrasive flow inlet pipe centering clamping base plate (16) comprises an abrasive flow inlet pipe centering clamping base plate bottom surface (16-1) and an abrasive flow inlet pipe centering clamping base plate side surface (16-2); the upper end surface of the abrasive flow inlet pipe centering clamping base plate bottom surface (16-1) is provided with a first slide rail groove (16-3), the direction of which is perpendicular to the abrasive flow inlet pipe centering clamping base plate side surface (16-2); the lower end surface of the abrasive flow inlet pipe centering clamping slider (29) is provided with a first slide rail (29-1), and the first slide rail (29-1) is connected to the abrasive flow inlet pipe centering clamping base plate. The first slide rail groove (16-3) forms a moving pair, so that the abrasive flow inlet pipe centering clamping slider (29) moves in a direction perpendicular to the side surface (16-2) of the abrasive flow inlet pipe centering clamping base plate, the upper end surface of the abrasive flow inlet pipe centering clamping slider (29) is provided with a second slide rail (29-2) and a third slide rail (29-3), the lower end surface of the left V-shaped block (27) is provided with a second slide rail groove (27-1), the lower end surface of the right V-shaped block (28) is provided with a third slide rail groove (28-1), the second slide rail (29- 2) and the second slide rail groove (27-1) form a moving pair, the third slide rail (29-3) and the third slide rail groove (28-1) form a moving pair, the upper end surface of the left V-shaped block (27) is provided with a fourth slide rail (27-2), the upper end surface of the right V-shaped block (28) is provided with a fifth slide rail (28-2), the abrasive inlet pipe centering clamping upper cover (14) is provided with a fourth slide rail groove (14-1) and a fifth slide rail groove (14-2), the fourth slide rail (27-2) and the fourth slide rail groove (14-1) form a moving pair The fifth slide rail (28-2) and the fifth slide rail groove (14-2) form a moving pair, the abrasive flow inlet pipe centering clamping upper cover (14) is fixedly connected to the side surface (16-2) of the abrasive flow inlet pipe centering clamping base plate, the side surface (16-2) of the abrasive flow inlet pipe centering clamping base plate is provided with a threaded hole, the axis of which is perpendicular to the side surface (16-2) of the abrasive flow inlet pipe centering clamping base plate, and the abrasive flow inlet pipe centering clamping push rod (30) is installed in the threaded hole on the side surface (16-2) of the abrasive flow inlet pipe centering clamping base plate.

[0052] By turning the abrasive inlet pipe centering clamp push rod (30) clockwise, the abrasive inlet pipe centering clamp slide block (29) moves in a direction perpendicular to and away from the side surface (16-2) of the abrasive inlet pipe centering clamp bottom plate. At the same time, the left V-shaped block (27) and the right V-shaped block (28) simultaneously move in a direction parallel to the side surface (16-2) of the abrasive inlet pipe centering clamp bottom plate toward the center of the abrasive inlet pipe centering clamp top cover (14) to position and clamp the abrasive inlet pipe. By turning the abrasive inlet pipe centering clamp push rod (30) counterclockwise, the abrasive inlet pipe centering clamp slide block (29) moves in a direction perpendicular to and away from the side surface (16-2) of the abrasive inlet pipe centering clamp bottom plate. The inlet pipe centering clamp push rod (30) causes the abrasive inlet pipe centering clamp slide block (29) to move in a direction perpendicular to and close to the side surface (16-2) of the abrasive inlet pipe centering clamp base plate. At the same time, the left V-shaped block (27) and the right V-shaped block (28) simultaneously move in a direction parallel to the side surface (16-2) of the abrasive inlet pipe centering clamp base plate and away from the center of the abrasive inlet pipe centering clamp upper cover (14), thereby loosening the abrasive inlet pipe (15) and replacing the abrasive inlet pipe (15).

[0053] The right side plate comprises (25) a bottom surface (25-1) on the right side plate and a side surface (25-2) on the right side plate, the edge of the bottom plate (1) is provided with a countersunk hole and a pin hole, the lower end surface of the left side plate (10) is provided with a threaded hole and a pin hole, and is fixedly connected to the corresponding countersunk hole and pin hole on the edge of the bottom plate (1) by screws and pins, the lower end surface of the side surface (25-2) of the right side plate is provided with a threaded hole and a pin hole, and is fixedly connected to the corresponding countersunk hole and pin hole on the edge of the bottom plate (1) by screws and pins, the upper end surface of the left side plate (10) is provided with a first matching hole (10-1), and the bottom surface (25-1) of the right side plate is provided with a first matching hole (10-1). The first matching hole (10-1), the second matching hole (25-3) and the third matching hole (25-4) are on the same straight line. The first matching hole (10-1) and the axis of the first circular connecting rod (11) form a rotation pair. The second matching hole (25-3) and the axis of the second circular connecting rod (17) form a rotation pair. The third matching hole (25-4) and the axis of the large gear (18) form a rotation pair. The upper end surface of the first circular connecting rod (11) is provided with through holes with different distances to the axis. The upper end surface of the second circular connecting rod (17) is provided with through holes with different distances to the axis. The through holes have different axial distances, the upper end surface of the large gear (18) is provided with a through hole (18) with different axial distances, the lower end surface of the cross bar (13) is provided with a first circular connecting rod matching hole (13-1), a second circular connecting rod matching hole (13-2) and a large gear matching hole (13-3), the first circular connecting rod matching hole (13-1) and the through hole provided on the upper end surface of the first circular connecting rod (11) form a rotating pair, the second circular connecting rod matching hole (13-2) and the through hole provided on the upper end surface of the second circular connecting rod (17) form a rotating pair, the large gear matching hole (13-3) and the upper end surface of the large gear (18) form a rotating pair. The through holes arranged on the end face form a rotating pair, the distance from the first circular connecting rod matching hole (13-1) to the axis of the first circular connecting rod (11) is equal to the distance from the second circular connecting rod matching hole (13-2) to the axis of the second circular connecting rod (17), and the distance from the large gear matching hole (13-3) to the axis of the large gear (18), the motor (20) is fixedly connected to the bottom surface (25-1) of the right side plate, the motor (20) is fixedly connected with a small gear (19), the small gear (19) and the large gear (18) are meshed, and the cross bar (13) is provided with a matching hole (13-4) for the centering clamping device of the abrasive inlet pipe.

[0054] The motor (20) drives the small gear (19) to rotate, and the small gear (19) drives the large gear (18) to rotate, so that the first circular connecting rod matching hole (13-1) moves in a circular motion around the axis of the first circular connecting rod (11), the second circular connecting rod matching hole (13-2) moves in a circular motion around the axis of the second circular connecting rod (17), and the large gear matching hole (13-3) moves in a circular motion around the axis of the large gear (18), so that the abrasive inlet pipe centering clamping device matching hole (13-4) moves in a circular motion around the center of the bottom plate (1). Circular motion, by changing the rotation pair formed by the first circular connecting rod matching hole (13-1) and the different through holes set on the upper end surface of the first circular connecting rod (11), changing the rotation pair formed by the second circular connecting rod matching hole (13-2) and the different through holes set on the upper end surface of the second circular connecting rod (17), changing the rotation pair formed by the large gear matching hole (13-3) and the different through holes set on the upper end surface of the large gear (18), thereby changing the diameter of the matching hole (13-4) of the abrasive inlet pipe centering clamping device making a circular motion around the center of the bottom plate (1).

[0055] The base plate (1) is provided with pin holes and threaded holes, and the lower end surfaces of the three six-bar mechanism support legs (2) are provided with pin holes and countersunk holes, which are positioned and connected to the corresponding pin holes and threaded holes on the base plate (1) by pins and screws, ensuring that the center of the six-bar mechanism base plate (3) and the center of the base plate (1) are on a vertical line.

[0056] The upper end surface of the cross bar (13) is provided with a matching hole (13-4) for the centering clamping device of the abrasive flow inlet pipe, the upper end surface of the cross bar (13) is provided with a pin hole and a threaded hole, and the lower end surface of the centering clamping base plate (16) of the abrasive flow inlet pipe is provided with a countersunk hole and a pin hole, which are positioned and connected to the corresponding pin holes and threaded holes on the cross bar (13) by pins and screws, ensuring that the abrasive flow inlet pipe (15) and the matching hole (13-4) for the centering clamping device of the abrasive flow inlet pipe are coaxial.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for abrasive flow precision machining of splines, characterized in that: The equipment includes three parts: a workpiece centering clamping device, an abrasive flow inlet pipe centering clamping device, and a shell fixing device. The workpiece centering clamping device consists of a six-bar mechanism, three six-bar mechanism support legs, a recovery bucket, a quick-change pad, and a clamping screw. The six-bar mechanism consists of a six-bar mechanism bottom plate, three six-bar mechanism side plates, three six-bar mechanism bases, three six-bar mechanism first connecting rods, three six-bar mechanism second connecting rods, three six-bar mechanism third connecting rods, a six-bar mechanism upper plate, three six-bar mechanism fixed clamping sliders, and a six-bar mechanism pull rod. The abrasive flow inlet pipe centering clamping device consists of an abrasive flow inlet pipe centering clamping upper cover, an abrasive flow inlet pipe centering clamping bottom plate, a left V-shaped block, a right V-shaped block, an abrasive flow inlet pipe centering clamping slider, an abrasive The inlet pipe is composed of a centering clamping push rod, the shell fixing device is composed of a four-bar mechanism, a small gear, and a motor, the four-bar mechanism is composed of a bottom plate, a right side plate, a left side plate, a first circular connecting rod, a cross bar, a second circular connecting rod, and a large gear, the six-bar mechanism bottom plate includes a six-bar mechanism bottom plate center portion and three evenly distributed six-bar mechanism bottom plate edge portions connected to the six-bar mechanism bottom plate center portion, the edges of the six-bar mechanism bottom plate edge portions are all provided with countersunk holes and pin holes, the lower ends of the six-bar mechanism side plates are provided with threaded holes and pin holes, the three six-bar mechanism side plates are fixedly connected to the three six-bar mechanism bottom plate edge portions by screws and pins, the six-bar mechanism upper plate includes a six-bar mechanism upper plate center portion and three evenly distributed six-bar mechanism bottom plate edge portions connected to the six-bar mechanism upper plate center portion, the six-bar mechanism upper plate edge portions are all evenly distributed six-bar mechanism bottom plate edge portions are ... The three evenly distributed six-bar mechanism upper plate edge parts are connected, the edges of the six-bar mechanism upper plate edge parts are provided with countersunk holes and pin holes, the upper ends of the six-bar mechanism side plates are provided with threaded holes and pin holes, the three six-bar mechanism upper plate edge parts are fixedly connected to the upper ends of the three six-bar mechanism side plates by screws and pins, the side faces of the six-bar mechanism side plates are provided with countersunk holes, and the bottom surface of the six-bar mechanism base is provided with threaded holes, and the three six-bar mechanism bases are fixedly connected to the side faces of the three six-bar mechanism side plates by screws, the center part of the six-bar mechanism bottom plate is provided with a slide rail, and the side faces of the six-bar mechanism pull rod are provided with a six-bar mechanism pull rod side slider, the center part of the six-bar mechanism bottom plate and the six-bar mechanism pull rod form a moving pair, and the six-bar mechanism pull rod The rod can move in a direction perpendicular to the upper end surface of the bottom plate of the six-bar mechanism, and three evenly distributed connecting blocks are arranged on the upper end surface of the pull rod of the six-bar mechanism, and each connecting block and the lower end of the second connecting rod of each six-bar mechanism form a rotating pair, and each six-bar mechanism base and the lower end of the first connecting rod of each six-bar mechanism form a rotating pair, and the upper end of the first connecting rod of each six-bar mechanism and the upper end of the second connecting rod of each six-bar mechanism and the lower end of the third connecting rod of each six-bar mechanism form a rotating pair, and the upper end of the third connecting rod of each six-bar mechanism and the lower end of each six-bar mechanism fixed clamping slider form a rotating pair, and the side surface of the six-bar mechanism fixed clamping slider is provided with a slide rail groove, and the edge of each six-bar mechanism upper plate is provided with a slide rail,Each of the six-bar mechanism fixed clamping sliders and each edge of the six-bar mechanism upper plate form a moving pair, and each of the six-bar mechanism fixed clamping sliders can move in the plane where the upper end surface of the six-bar mechanism upper plate is located along the direction toward and away from the center of the six-bar mechanism upper plate. The upper end surface of the six-bar mechanism fixed clamping slider is parallel to the upper end surface of the six-bar mechanism upper plate. The lower end surface of the six-bar mechanism pull rod is provided with a threaded hole, and the upper end of the clamping screw is installed in the threaded hole of the lower end surface of the six-bar mechanism pull rod. The side of the quick-change pad is provided with a notch, and the quick-change pad is installed between the lower end surface of the six-bar mechanism bottom plate and the clamping screw through the notch and can be removed from the lower end surface of the six-bar mechanism bottom plate and the clamping screw. The three edge portions of the six-bar mechanism bottom plates are fixedly connected with three six-bar mechanism support legs, and the center portion of the six-bar mechanism upper plate is provided with a recovery bucket matching hole, and the recovery bucket is fixedly connected to the edge portion of the recovery bucket matching hole.

2. The abrasive flow precision machining spline equipment according to claim 1, characterized in that: When the quick-change pad is installed between the lower end surface of the six-bar mechanism bottom plate and the clamping screw, the clamping screw is tightened, the six-bar mechanism pull rod will move downward, and at the same time, the three six-bar mechanism fixed clamping slide blocks will simultaneously move toward the center of the six-bar mechanism upper plate, so as to clamp the workpiece. When the workpiece is clamped, the axis of the workpiece is perpendicular to the upper end surface of the six-bar mechanism upper plate and passes through the center of the six-bar mechanism upper plate. When the diameter of the workpiece is changed, the axis of the workpiece still passes through the center of the six-bar mechanism upper plate, which plays a role in centering and clamping the workpiece. When the clamping screw is loosened and the quick-change pad is removed from between the lower end surface of the six-bar mechanism bottom plate and the clamping screw, the six-bar mechanism pull rod is moved upward, and the three six-bar mechanism fixed clamping slide blocks will simultaneously move away from the center of the six-bar mechanism upper plate, and the workpiece can be replaced.

3. The abrasive flow precision machining spline equipment according to claim 1, characterized in that: The abrasive flow inlet pipe centering clamping base plate comprises a bottom surface of the abrasive flow inlet pipe centering clamping base plate and a side surface of the abrasive flow inlet pipe centering clamping base plate, the upper end surface of the bottom surface of the abrasive flow inlet pipe centering clamping base plate is provided with a first slide rail groove, the direction of which is perpendicular to the side surface of the abrasive flow inlet pipe centering clamping base plate, the lower end surface of the abrasive flow inlet pipe centering clamping slider is provided with a first slide rail, the first slide rail and the first slide rail groove form a moving pair, so that the abrasive flow inlet pipe centering clamping slider moves in a direction perpendicular to the side surface of the abrasive flow inlet pipe centering clamping base plate, the upper end surface of the abrasive flow inlet pipe centering clamping slider is provided with a second slide rail and a third slide rail, the lower end surface of the left V-shaped block is provided with a second slide rail groove, the lower end surface of the right V-shaped block is provided with a third slide rail groove, the first The second slide rails and the second slide rail groove form a moving pair, the third slide rail and the third slide rail groove form a moving pair, the upper end surface of the left V-shaped block is provided with a fourth slide rail, the upper end surface of the right V-shaped block is provided with a fifth slide rail, the abrasive flow inlet pipe centering clamping upper cover is provided with a fourth slide rail groove and a fifth slide rail groove, the fourth slide rail and the fourth slide rail groove form a moving pair, the fifth slide rail and the fifth slide rail groove form a moving pair, the abrasive flow inlet pipe centering clamping upper cover is fixedly connected to the side surface of the abrasive flow inlet pipe centering clamping base plate, the side surface of the abrasive flow inlet pipe centering clamping base plate is provided with a threaded hole, and its axis is perpendicular to the side surface of the abrasive flow inlet pipe centering clamping base plate, and the abrasive flow inlet pipe centering clamping push rod is installed in the threaded hole on the side surface of the abrasive flow inlet pipe centering clamping base plate.

4. The abrasive flow precision machining spline equipment according to claim 3, characterized in that: Turning the abrasive flow inlet tube centering clamping push rod clockwise will cause the abrasive flow inlet tube centering clamping slider to move in a direction perpendicular to and away from the side of the abrasive flow inlet tube centering clamping base plate, and at the same time, the left V-shaped block and the right V-shaped block simultaneously move in a direction parallel to the side of the abrasive flow inlet tube centering clamping base plate toward the center of the abrasive flow inlet tube centering clamping upper cover, so as to position and clamp the abrasive flow inlet tube; turning the abrasive flow inlet tube centering clamping push rod counterclockwise will cause the abrasive flow inlet tube centering clamping slider to move in a direction perpendicular to and close to the side of the abrasive flow inlet tube centering clamping base plate, and at the same time, the left V-shaped block and the right V-shaped block simultaneously move in a direction parallel to the side of the abrasive flow inlet tube centering clamping base plate toward the center of the abrasive flow inlet tube centering clamping upper cover, so as to loosen the abrasive flow inlet tube and replace it.

5. The abrasive flow precision machining spline equipment according to claim 1, characterized in that: The right side plate comprises a bottom surface of the right side plate and a side surface of the right side plate, the edge portion of the bottom plate is provided with a countersunk hole and a pin hole, the lower end surface of the left side plate is provided with a threaded hole and a pin hole, and is fixedly connected at the corresponding countersunk hole and pin hole at the edge of the bottom plate by screws and pins, the lower end surface of the side surface of the right side plate is provided with a threaded hole and a pin hole, and is fixedly connected at the corresponding countersunk hole and pin hole at the edge of the bottom plate by screws and pins, the upper end surface of the left side plate is provided with a first matching hole, and the bottom surface of the right side plate is provided with a second matching hole and a third matching hole, the first matching hole, the second matching hole, and the third matching hole are on the same straight line, the first matching hole and the first circular connecting rod axis form a rotating pair, the second matching hole and the second circular connecting rod axis form a rotating pair, the third matching hole and the large gear axis form a rotating pair, the upper end surface of the first circular connecting rod is provided with through holes with different distances to the axis, and the upper end surface of the second circular connecting rod is provided with Through holes with different distances to the axis are provided, and the upper end face of the large gear is provided with through holes with different distances to the axis. The lower end face of the cross bar is provided with a first circular connecting rod matching hole, a second circular connecting rod matching hole and a large gear matching hole. The first circular connecting rod matching hole and the through hole provided on the upper end face of the first circular connecting rod form a rotating pair, the second circular connecting rod matching hole and the through hole provided on the upper end face of the second circular connecting rod form a rotating pair, the large gear matching hole and the through hole provided on the upper end face of the large gear form a rotating pair, the distance from the first circular connecting rod matching hole to the axis of the first circular connecting rod is equal to the distance from the second circular connecting rod matching hole to the axis of the second circular connecting rod is equal to the distance from the large gear matching hole to the axis of the large gear, the motor is fixedly connected to the bottom face of the right side plate, the motor is fixedly connected with a pinion, the pinion is meshed with the large gear, and the cross bar is provided with a matching hole for the centering clamping device of the abrasive inlet pipe.

6. The abrasive flow precision machining spline equipment according to claim 5, characterized in that: The motor drives the small gear to rotate, and the small gear drives the large gear to rotate, so that the first circular connecting rod matching hole makes a circular motion around the axis of the first circular connecting rod, the second circular connecting rod matching hole makes a circular motion around the axis of the second circular connecting rod, and the large gear matching hole makes a circular motion around the axis of the large gear, so that the abrasive flow inlet pipe centering clamping device matching hole makes a circular motion around the center of the base plate. By changing the first circular connecting rod matching hole and the different through holes set on the upper end face of the first circular connecting rod to form a rotating pair, changing the second circular connecting rod matching hole and the different through holes set on the upper end face of the second circular connecting rod to form a rotating pair, changing the large gear matching hole and the different through holes set on the upper end face of the large gear to form a rotating pair, the diameter of the abrasive flow inlet pipe centering clamping device matching hole making a circular motion around the center of the base plate is changed.

7. The abrasive flow precision machining spline equipment according to claim 1, characterized in that: The base plate is provided with pin holes and threaded holes, and the lower end surfaces of the three six-bar mechanism support legs are provided with pin holes and countersunk holes, which are positioned and connected to the corresponding pin holes and threaded holes on the base plate by pins and screws to ensure that the center of the six-bar mechanism base plate and the center of the base plate are on a vertical line.

8. The abrasive flow precision machining spline equipment according to claim 1, characterized in that: The upper end surface of the cross bar is provided with a matching hole for the abrasive flow inlet pipe centering clamping device, the upper end surface of the cross bar is provided with a pin hole and a threaded hole, the lower end surface of the abrasive flow inlet pipe centering clamping base plate is provided with a countersunk hole and a pin hole, which are positioned and connected to the corresponding pin holes and threaded holes on the cross bar by pins and screws to ensure that the abrasive flow inlet pipe and the matching holes of the abrasive flow inlet pipe centering clamping device are coaxial.

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