CN113172542A

CN113172542A - Spherical surface grinding device and grinding method

Info

Publication number: CN113172542A
Application number: CN202110550470.5A
Authority: CN
Inventors: 高贵焕; 徐清
Original assignee: Takahashi Metal Manufacturing Suzhou Co ltd
Current assignee: Takahashi Metal Manufacturing Suzhou Co ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-07-27

Abstract

The invention discloses a spherical surface grinding device, which comprises a rack, wherein a supporting plate is arranged on the rack; the panel is pivoted with the supporting seat; the jacking cylinder is fixedly arranged at the rear side of the supporting seat, and a cylinder shaft of the jacking cylinder is connected to the bottom of the panel and drives the panel to rotate around the first rotating shaft; the rotating mechanism comprises a rotating shaft capable of rotating automatically, the upper end of the rotating shaft is connected with a driving mechanism in a universal mode, the driving mechanism is arranged on the panel and comprises an upper rotating motor and a rotating output shaft, and the lower end of the rotating output shaft is connected with a universal joint; the swing mechanism is arranged on the panel and has a linear moving structure, the swing mechanism is connected with and drives the rotating shaft to swing, and the rotating shaft rotates relative to the swing mechanism. The invention has the beneficial effects that: the valve plate is fixed through the grinding plate connecting piece and the inserting rod, the swing arm drives the valve plate to do circular motion, the clamping block compresses tightly and drives the valve plate to rotate, the slipping phenomenon is prevented, and the grinding quality and the working efficiency are improved; the jacking cylinder indirectly directly exerts acting force on the valve plate, and the problems that the valve plate is difficult to rotate and grind and the like are effectively avoided.

Description

Spherical surface grinding device and grinding method

Technical Field

The invention belongs to the technical field of machine manufacturing, and particularly relates to a spherical surface grinding device and a grinding method.

Background

In the production process of the plunger pump, the contact surface of the oil cylinder and the valve plate on the plunger pump needs to be ground so as to ensure the non-matching precision. During the grinding process, firstly, the grinding between the grinding disc and the port plate is ensured, otherwise, the grinding precision is influenced. Moreover, the traditional grinding adopts a manual grinding mode, which wastes time and labor, and easily causes the problems of uneven grinding, failure to reach the required processing precision, insufficient grinding quality and the like.

The prior art shows a mechanical automatic spherical grinding device, and the spherical lapping device disclosed in chinese patent CN201720870642.6 has at least the following problems: firstly, the counterweight block is adopted to directly apply pressure to the valve plate, the counterweight block needs to be adjusted according to the bearing capacity of different valve plates in the mode, and if the weight of the counterweight block is inconsistent with the bearing capacity of the valve plate, the problems that the valve plate is not attached to a cylinder body enough, or the valve plate is difficult to rotate and grind and the like are caused; secondly, this patent adopts top and the valve plate center on the latch device to withstand, because top diameter is less than the diameter of the pilot hole on the valve plate, the phenomenon of skidding inevitably can take place for the polished surface of cylinder body and valve plate in the grinding process, influences the grinding effect. In order to prevent slipping and then fixing through the clamping rod, the structure is complex and the operation is inconvenient.

Therefore, how to ensure the polishing efficiency and the polishing quality is a technical problem to be solved urgently.

Disclosure of Invention

The present invention is directed to a spherical surface polishing apparatus and a spherical surface polishing method, which solve the above problems of the prior art.

The purpose of the invention is realized by the following technical scheme:

the spherical surface grinding device comprises a frame, a supporting seat is arranged on the frame,

a panel which is pivotally connected with the supporting seat;

the jacking cylinder is fixed on the rack and positioned at the rear side of the supporting seat, and a cylinder shaft of the jacking cylinder is connected to the bottom of the panel and drives the panel to rotate around a first rotating shaft pivoted with the supporting seat;

a rotary mechanism, including the pivot that is used for connecting the abrasive disc, the actuating mechanism of its rotation of drive is connected through the universal joint in the upper end of pivot, actuating mechanism sets up on the panel, it is including fixing last rotating electrical machines on the panel and by the rotatory output shaft of its drive rotation, rotatory output shaft with the panel is perpendicular, the lower extreme of rotatory output shaft is connected the universal joint

The swinging mechanism is arranged on the panel and has a structure which generates linear movement parallel to the panel and vertical to the first rotating shaft, the swinging mechanism is connected with the rotating shaft and drives the rotating shaft to swing, and the rotating shaft can rotate relative to the swinging mechanism.

Preferably, the driving mechanism comprises an upper rotating motor arranged on the panel, and a motor shaft of the upper rotating motor is parallel to the panel and is perpendicular to the first rotating shaft; a first bevel gear is coaxially sleeved outside a motor shaft of the upper rotating motor and meshed with a second bevel gear, and the second bevel gear is coaxially sleeved on the rotating output shaft.

Preferably, the periphery of the rotating shaft is sleeved with a fixed block, a pressing block and a spring fixed between the pressing block and the spring; the fixed block is fixedly connected with the rotating shaft through a bearing; the pressing block is located at the bottom end of the rotating shaft and can move along the axial direction of the rotating shaft, the pressing block is connected with the swinging mechanism, and the lower end of the rotating shaft is coaxially connected with a grinding disc connecting piece which extends to the lower portion of the pressing block and is used for connecting the grinding disc.

Preferably, the lower end of the pressing block is connected with a clamping block, and the clamping block is provided with a hole for the grinding disc connecting piece to pass through.

Preferably, the swing mechanism comprises a swing motor, a crank link mechanism and a swing arm; the swing motor is arranged on the panel, a motor shaft of the swing motor vertically penetrates through the panel and is connected with the crank-link mechanism, the crank-link mechanism converts the rotary motion of the swing motor into the linear motion of the swing arm, the crank-link mechanism is connected with the swing arm through a universal joint, and the front end of the swing arm is pivoted with the pressing block.

Preferably, the bottom of the panel is provided with a guide rail which is parallel to the panel and is perpendicular to the first rotating shaft, a guide plate is hung on the guide rail in a sliding manner, the guide plate is movably inserted into a vertically extending through hole formed in the swing arm, and the lower end of the guide plate is connected with a limiting plate which is located below the swing arm and used for limiting the swing arm.

Preferably, the device further comprises a workpiece positioning jig which is coaxial with the rotating output shaft in a vertical state.

Preferably, the workpiece positioning jig is connected with a rotation driving mechanism for driving the workpiece positioning jig to rotate.

Preferably, the upper surface of panel is provided with the balancing weight, the balancing weight is located the top of jacking cylinder.

Preferably, a cylinder shaft of the jacking cylinder is connected with the panel through an elastic buffer piece.

The method of the spherical surface grinding device comprises the following steps,

s1: retracting a cylinder shaft of the jacking cylinder to enable the panel to rotate around the first rotating shaft to be in an inclined state with a high front end and a low rear end;

s2: mounting the grinding disc on a ball head connecting piece at the lower end of the rotating shaft; placing the valve plate on the grinding plate workpiece positioning jig for positioning;

s3: a cylinder shaft of the jacking cylinder extends out to drive the panel to rotate reversely around the first rotating shaft to reset until the panel is in a horizontal state, and the grinding disc is in contact with the grinding surface of the valve plate;

s4: the upper rotating motor is started to drive the grinding disc on the rotating shaft to rotate and/or the lower rotating motor is started to drive the workpiece positioning jig to drive the thrust plate to rotate for grinding, and the swinging motor is started to drive the rotating shaft to swing in a reciprocating mode in the whole working process or part of working time of the upper rotating motor.

The technical scheme of the invention has the advantages that:

the clamping block is connected with the valve plate, and the valve plate is fixed through the grinding plate connecting piece and the inserted rod, so that the stability is improved; the valve plate performs circumferential rotary grinding under the action of the swing arm, and the valve plate can be prevented from slipping with the grinding plate under the compression and rotation actions of the clamping block, so that the grinding quality and the working efficiency are improved, and the labor cost is saved;

the balancing weight exerts the effort to the jacking cylinder, and the motion direction of jacking cylinder and valve plate is opposite, and the jacking cylinder can't directly exert the effort to the valve plate, so can avoid not laminating between valve plate and the cylinder body, perhaps the valve plate is difficult to the rotatory scheduling problem that grinds.

Drawings

FIG. 1: perspective view of the present invention;

FIG. 2: front view of the invention;

FIG. 3: the right view of the invention;

FIG. 4: the left side view of the invention;

FIG. 5: the invention is illustrated in an enlarged view in section a of figure 4.

Detailed Description

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. The embodiments are merely exemplary for applying the technical solutions of the present invention, and any technical solution formed by replacing or converting the equivalent thereof falls within the scope of the present invention claimed.

In the description of the schemes, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

Referring to fig. 1 to 4, the present invention discloses a spherical polishing apparatus and a polishing method. The ball grinding device comprises a frame 1, wherein a support seat 10 is arranged on the frame 1, the top end of the support seat 10 is pivotally connected with a panel 102, namely, the panel 102 can rotate around a first rotating shaft 1021 which is pivotally connected with the support seat 10, and the first rotating shaft 1021 is connected with the middle rear part of the panel 102.

As shown in fig. 3 and 4, a jacking cylinder 2 is fixed on the frame 1, the jacking cylinder 2 is located behind the supporting seat 10 and below the panel 102, a cylinder shaft of the jacking cylinder 2 is pivotally connected to the bottom of the panel 102, and the jacking cylinder 2 drives the panel 102 to rotate around the first rotating shaft 1021, so as to switch the state of the panel 102. In the first state, the cylinder shaft of the jacking cylinder 2 retracts, an included angle is formed between the panel 102 and the horizontal line, and the panel is in an inclined state with a high front end and a low rear end. In the second state, the cylinder axis of the jacking cylinder 2 extends, and the panel 102 is in a horizontal state or a nearly horizontal state with the same height at the front end and the rear end. Of course, the jacking cylinder 2 can be replaced by other components capable of moving linearly disclosed in the prior art, such as various electric push rods or hydraulic cylinders, etc., and the position can also be arranged above the panel 102.

As shown in fig. 4, the cylinder shaft of the jacking cylinder 2 is connected to the bottom surface of the panel 102 through an elastic buffer 20, that is, the elastic buffer 20 prevents the cylinder shaft from bending or even breaking due to hard contact with the panel, thereby effectively prolonging the service life of the cylinder shaft and the panel, and simultaneously playing a certain role in buffering the reaction force of the workpiece on the panel during grinding. The specific structure of the elastic buffering member 20 may be designed as required, for example, in a feasible manner, a limiting member is fixed at the bottom of the panel 102, a spring whose axis is perpendicular to the panel is disposed in an inner cavity of the limiting member, an upper end of the spring abuts against and is fixed to the bottom surface of the panel 102 or a bottom surface of a boss disposed on the bottom surface of the panel, a lower end of the spring abuts against or is fixed to a pivot connecting member limited to the limiting member, and a cylinder shaft of the jacking cylinder 2 passes through a hole at the bottom of the limiting member and is pivoted to the pivot connecting member. Of course, the elastomeric damper 20 may be of other possible configurations or may be omitted in other embodiments.

The upper surface of panel 102 is provided with balancing weight 11, and balancing weight 11 is located jacking cylinder 2 is directly over, balancing weight 11 is used for making the weight of the mechanism around panel 102 can keep certain balance to reduce the requirement to jacking cylinder, the weight of balancing weight 11 designs as required, and this place does not do the restriction.

The invention also comprises a rotating mechanism 3 as shown in fig. 4, wherein the rotating mechanism 3 comprises a rotating shaft 32 for connecting the grinding disc 7, and the rotating shaft 32 is positioned at the front end of the panel 102 (the end of the panel 102 far away from the balancing weight 11). The top end of the rotating shaft 32 is connected to a driving mechanism for driving the rotating shaft to rotate through a universal joint 203. The driving mechanism is provided on the panel 102, and includes an upper rotating motor 31 fixed to the panel 102 and a rotating output shaft 2011 that is driven by the upper rotating motor 31 to rotate. The motor shaft of the upper rotating motor 31 is parallel to the panel 102 and perpendicular to the first rotating shaft 1021 around which the panel 102 rotates. The rotational output shaft 2011 is perpendicular to the faceplate 102. Of course, the upper spin motor 31 may also be disposed perpendicular to or inclined from the panel 102, but it is preferred to adopt a parallel disposition state in the present invention, and it can be specifically adjusted according to the usage requirement. A first bevel gear 201 is coaxially connected to a motor shaft of the upper rotating motor 31; the first bevel gear 201 is meshed with the second bevel gear 202, the second bevel gear 202 is coaxially sleeved on the upper portion of a rotating output shaft 2011, the rotating output shaft 2011 is rotatably arranged on a mounting plate parallel to the panel 102 through a bearing, the mounting plate is fixed at the front end of the panel and is higher than the panel, and the lower end of the rotating output shaft 2011 is connected with the universal joint 203.

After the upper rotating motor 31 is started, the horizontal rotation of the motor shaft is switched from the first bevel gear 201 and the second bevel gear 202 to the vertical rotation of the rotating output shaft 2011, and the rotating output shaft 2011 drives the universal joint and the rotating shaft 32 connected with the universal joint to rotate.

As shown in fig. 4, the fixing block 33, the pressing block 35 and the spring 305 fixed therebetween are sleeved on the outer periphery of the rotating shaft 32. The fixed block 33 is coaxially arranged at the upper end of the rotating shaft 32 through a bearing, and two ends of the spring 305 are fixedly connected or abutted with the fixed block 33 and the pressing block 35. The pressing block 35 is sleeved at the bottom end of the rotating shaft 32, and the pressing block 35 can move along the axial direction of the rotating shaft relative to the rotating shaft 32.

Furthermore, a clamping block 34 coaxial with the rotating shaft 32 is connected below the pressing block 35, and the pressing block 35 is connected with the clamping block 34 through a connecting rod. The center of the clamping block 34 is provided with a hole for the grinding disc connecting piece connected with the lower end of the rotating shaft to pass through.

The lower end of the rotating shaft 32 is coaxially provided with a screw hole for connecting a grinding disc connecting piece 321, the grinding disc connecting piece can be in various feasible structures, for example, the grinding disc connecting piece 321 can be a rod piece with a limiting structure such as a latch or a bump on the lower end surface, preferably, a ball head connecting piece which is used for connecting a grinding disc 7 with a corresponding ball head connecting groove or hole in the center. The grinding surface of the grinding disc 7 is not smaller than that of the port plate to be ground. And under the normal state, the spring 305 makes the ball head of the grinding disc connecting piece 321 positioned above the bottom surface of the clamping block 34, and the grinding disc connecting piece 321 cannot contact with the grinding disc 7; when the grinding disc 7 needs to be mounted on the grinding disc connecting piece 321, the clamping block 34 can be pushed upwards through the grinding disc 7, so that the ball head of the grinding disc connecting piece 321 extends out of the lower end of the clamping block 34 and is clamped with the connecting groove or the connecting hole in the center of the grinding disc 7; or, the grinding disc 7 may be placed on a valve plate on the workpiece positioning fixture 9, and when the panel 102 is switched to the second state, and the clamping block 34 abuts against the top surface of the grinding disc 7, so as to cause the grinding disc to be lifted, the ball head of the grinding disc connecting member 321 may extend to the lower side of the clamping block 34 and be inserted into the center of the grinding disc 7, so as to achieve connection.

As shown in fig. 4, during grinding, the grinding disc 7 is mounted on the ball head connecting rod 321, the bottom surface of the grinding disc 7 is in a shape matched with the surface to be ground of the workpiece, during grinding of the flow distribution disc, the bottom surface of the grinding disc 7 is a corresponding spherical surface, during grinding, the grinding disc 7 abuts against the flow distribution disc, and is subjected to upward pressure from the flow distribution disc, the pressure is transmitted upward, so that the pressing block 35 moves upward relative to the rotating shaft 32, the pressing block 35 applies pressure to the spring 305 to deform the spring, and the reaction force of the spring 305 acts on the fixing block 33 to fix the fixing block 33, so that the rotating shaft 32 can rotate relative to the fixing block 33 and drive the grinding disc 7 mounted thereon to rotate, and simultaneously, the reaction force of the spring 305 also applies downward pressure to the pressing block 35 to make the grinding disc 7 tightly fit with the flow distribution disc.

As shown in fig. 4, in order to ensure the sufficiency and uniformity of the grinding, the rotating shaft 32 can make a swinging motion, specifically, the rotating shaft 32 is connected with a swinging mechanism 4 which drives the rotating shaft to swing relative to a universal shaft, the swinging mechanism 4 is arranged on a panel 102, and has a structure which generates a linear movement parallel to the panel 102, the structure is connected with the rotating shaft 32 and drives the rotating shaft 32 to swing, and the rotating shaft 32 can rotate relative to the swinging mechanism 4.

The swing mechanism 4 specifically includes a swing motor 41, a crank link mechanism 42, and a swing arm 424. In the present invention, the swing motor 41 is preferably disposed on the panel 102 and behind the upper rotating motor, and a motor shaft thereof is perpendicular to and penetrates the panel 102 and is connected to the crank link mechanism 42. The crank link mechanism 42 is connected to a motor shaft of the swing motor 41, and is configured to switch a rotation of the motor shaft of the swing motor 41 to a linear motion of the swing arm 424, where a linear motion direction of the swing arm 424 is a linear motion generated by the swing mechanism. The specific structure of the crank mechanism 42 may be any of various known possible structures.

Specifically, the swing motor 41 is connected to the crank link mechanism 42 through a transmission shaft 411 coaxially connected below a motor shaft thereof, and the crank link mechanism 42 includes a rotary plate 412 connected to a bottom end of the transmission shaft 411.

As shown in fig. 5, an L-shaped crank 421 is disposed at the bottom of the rotary plate 412, a vertical rod of the L-shaped crank 421 is eccentrically fixed at the bottom of the rotary plate 412, a cross rod of the crank 421 is connected to a rocker 422 parallel to an axis of the transmission shaft 411, the rocker 422 is offset from the transmission shaft, a lower end of the rocker 422 is connected to a first oscillating rod 423 through a bearing, and the first oscillating rod 423 is connected to the oscillating arm 424 through a universal joint 425. As shown in fig. 2 to 4, the front end of the swing arm 424 is bifurcated into a Y-shape or a U-shape, and each leg is pivotally connected to a side wall of the pressing block 35.

As shown in fig. 3 to 4, the panel 102 and the swing arm 424 are formed with through holes, the through holes extend vertically, that is, the axes of the through holes are perpendicular to the horizontal panel, and a guide plate 431 is movably inserted at the through holes, that is, the length of the through holes is at least greater than the length of the guide plate 431, and the through holes may be any shape, preferably, the through holes are kidney-shaped holes. The lower end of the guide plate 431 passes through the perforation and is connected to a limit plate 425 below the swing arm, and the width of the limit plate 425 is greater than that of the perforation, so that the swing arm is restricted from being separated from the guide plate 431. In the present invention, the limiting plate 425 is preferably fixedly connected to the bottom of the guiding plate 431 by a bolt, and the connection between the limiting plate and the guiding plate can also be replaced by other fixing methods disclosed in the prior art, which is not described herein again. A guide rail 5 is fixed to a bottom surface of the panel 102, parallel thereto, and perpendicular to the first rotation shaft 1021. The guide plate 431 is slidably disposed on the guide rail 5 by a slider at an upper portion thereof, so that the swing arm 424 can be guaranteed to make a linear motion.

Still be provided with the pressing handle 6 that extends to its front end on the panel, pressing handle 6 is by two straight tubes and the integrative connection of arc pipe that are parallel to each other, and the arc pipe is located and keeps away from swing motor 41's one end. The handle 6 is lifted upwards or pressed downwards to drive the panel 102 to rotate around the first rotating shaft 1021, and meanwhile, the valve plate to be ground is conveniently mounted on the bottom surface of the grinding disc 7 or the valve plate ground on the valve plate to be ground is conveniently dismounted.

Referring to fig. 2 and 4, a telescopic rod 101 is further pivotally disposed on the support base 10, and the pivotal connection is a conventional one and will not be described herein. The top end of the telescopic rod 101 is fixedly connected with the bottom surface of the panel 102, and an acute angle is formed between the telescopic rod 101 and the panel 102. In the first state, the panel 102 is lifted up and forms an obtuse angle with the support base 10, and at this time, the telescopic rod 101 rotates around the pivot connection, and the telescopic section thereof extends out; in the second state, the panel 102 is perpendicular to the support base 10, and the extension rod 101 rotates around the pivot joint while the extension section thereof retracts. Since the structure of the telescopic rod is the prior art, it is not described herein. The specific structure of the telescopic rod 101 is a known technology, and is mainly used for playing a role in buffering when the panel rotates, and details are not described herein.

As shown in fig. 4, the present invention further includes a workpiece positioning fixture 9, the installation height of the workpiece positioning fixture 9 is adjusted as required, and the workpiece positioning fixture 9 is coaxial with the vertical rotary output shaft 2011 (when the panel 102 is in a horizontal state) and is connected to a rotation driving mechanism for driving the rotation of the rotary output shaft. The workpiece positioning jig 9 has a structure for coaxially positioning the workpiece thereon and making the workpiece not rotatable relative thereto, and the specific structure is designed as required, which is not described herein again.

The rotation driving mechanism comprises a lower rotation motor 91 fixedly arranged on the frame 1, a transmission mechanism and a lower rotation rod 93. The lower rotating motor 91 is horizontally arranged and connected with the lower rotating rod 93 through a lower bevel gear set 92, the lower bevel gear set 92 is composed of two bevel gears with axes perpendicular to each other and meshed with each other, and the structure of the lower bevel gear set is consistent with the structure of the first bevel gear 201 and the second bevel gear 202 in the driving mechanism, which is not described herein again. The lower rotating rod 93 is arranged in a direction perpendicular to the direction in which the motor shaft of the lower rotating motor 91 is arranged, and is driven to rotate by the lower bevel gear 92. The lower rotating rod 93 is arranged on the mounting seat in a self-rotating manner, and the workpiece positioning jig 9 is arranged at the top of the lower rotating rod. Of course, the workpiece positioning jig 9 may also have a structure for polishing the bottom surface of the workpiece, that is, the workpiece positioning jig 9 may be a polishing disk 94 capable of positioning the axial direction and the horizontal position of the workpiece, so as to realize double-sided polishing.

Of course, the motor shaft of the lower rotating motor 91 may be coaxially connected to the lower rotating rod 93.

The following briefly describes the spherical surface grinding method of the present invention:

s1: the cylinder shaft of the jacking cylinder 2 retracts to drive the panel 102 and the rotating shaft 32 to rotate around the first rotating shaft 1021 until the panel 102 is in a state that the front end is higher and the rear end is lower, so that the grinding disc 7 and the valve plate can be assembled or disassembled conveniently;

s2: mounting the grinding disc 7 on the grinding disc connecting piece 321 at the lower end of the rotating shaft 32, and placing the valve plate in the workpiece positioning jig 9;

s3: the cylinder shaft of the jacking cylinder 2 extends out to drive the panel 102 and the rotating shaft 32 to rotate around the first rotating shaft 1021 until the panel 102 is in a horizontal state. The grinding disc 7 is in contact with the grinding surface of the port plate, and the insertion rod 321 is inserted in the center of the grinding disc 7;

s4: starting an upper rotating motor 31 and/or a lower rotating motor 91, wherein the upper rotating motor 31 drives a first bevel gear 201 coaxially connected with a motor shaft thereof to rotate, the first bevel gear 201 further drives a second bevel gear 202 meshed with the first bevel gear to rotate, and the setting direction of the second bevel gear 202 is vertical to the setting direction of the first bevel gear 201 and is coaxially connected with the rotating shaft 32; and then drive pivot 32 is rotatory, pivot 32 drives coaxial setting in its bottom grind the one side of valve plate with grinding disk 7. After the lower rotating motor 91 is started, a motor shaft of the lower rotating motor drives the lower rotating rod 93 to rotate through a lower bevel gear set with the same structure as the first bevel gear 201 and the second bevel gear 202, the lower rotating rod 93 further drives the lower grinding disc 94 which is coaxially arranged with the lower rotating rod to rotate, and the rotation of the lower grinding disc 94 is to grind the lower surface of the valve plate.

The swing motor 41 is started in the whole or partial working process of the upper rotating motor 31, the crank link mechanism 42 is driven to act, and the crank link mechanism 42 drives the swing arm 424 to move linearly, so that the rotating shaft 32 and the grinding disc 7 are driven to swing. In the grinding process, the thrust plate generates upward acting force which is transmitted to the grinding plate 7, the clamping block 34 and the pressing block 35 in sequence, the pressing block 35 moves up and down under stress and exerts acting force on the spring 305, and when the pressing block 35 moves up and down, the swing arm 424 moves up and down around the universal joint relative to the guide plate.

The invention has various embodiments, and all technical solutions formed by adopting equivalent transformation or equivalent transformation are within the protection scope of the invention.

Claims

1. Sphere grinder, including frame (1), be provided with supporting seat (10) on frame (1), its characterized in that:

a panel (102) pivotally connected to the support base (10);

the jacking cylinder (2) is fixed on the rack (1) and positioned at the rear side of the supporting seat (10), and a cylinder shaft of the jacking cylinder is connected to the bottom of the panel (102) and drives the panel (102) to rotate around a first rotating shaft (1021) which is pivoted with the supporting seat (10);

the rotating mechanism (3) comprises a rotating shaft (32) connected with the grinding disc (7), the upper end of the rotating shaft (32) is connected with a driving mechanism for driving the rotating shaft to rotate through a universal joint (203), the driving mechanism is arranged on the panel (102) and comprises an upper rotating motor (31) fixed on the panel (102) and a rotating output shaft (2011) driven to rotate by the upper rotating motor, the rotating output shaft (2011) is vertical to the panel (102), and the lower end of the rotating output shaft is connected with the universal joint;

the swinging mechanism (4) is arranged on the panel (102) and has a structure for generating linear movement which is parallel to the panel (102) and is vertical to the first rotating shaft (1021), the swinging mechanism is connected with the rotating shaft (32) and drives the rotating shaft (32) to swing, and the rotating shaft (32) can rotate relative to the swinging mechanism (4).

2. The spherical grinding apparatus as claimed in claim 1, wherein: the motor shaft of the upper rotating motor (31) is parallel to the panel (102) and perpendicular to the first rotating shaft (1021); a first bevel gear (201) is coaxially sleeved outside a motor shaft of the upper rotating motor (31), the first bevel gear is meshed with a second bevel gear (202), and the second bevel gear (202) is coaxially sleeved on the rotating output shaft (2011).

3. The spherical grinding apparatus as claimed in claim 2, wherein: the periphery of the rotating shaft (32) is sleeved with a fixed block (33), a pressing block (35) and a spring (305) fixed between the fixed block and the pressing block; the fixed block (33) is fixedly connected with the rotating shaft (32) through a bearing; the pressing block (35) is located at the bottom end of the rotating shaft (32) and can move axially along the rotating shaft (32), the pressing block (35) is connected with the swinging mechanism (4), and the lower end of the rotating shaft (32) is coaxially connected with a grinding disc connecting piece (321) which extends to the lower portion of the pressing block (35) and is used for connecting the grinding disc (7).

4. A spherical grinding apparatus as set forth in claim 3, wherein: the lower extreme of briquetting (35) is connected joint piece (34), joint piece (34) have the confession hole that abrasive disc connecting piece (321) passed.

5. A spherical grinding apparatus as set forth in claim 3, wherein: the swing mechanism (4) comprises a swing motor (41), a crank connecting rod mechanism (42) and a swing arm (424); the swing motor (41) is arranged on the panel (102), a motor shaft of the swing motor vertically penetrates through the panel (102) and is connected with the crank connecting rod mechanism (42), the crank connecting rod mechanism (42) converts the rotary motion of the swing motor (41) into the linear motion of the swing arm (424), the crank connecting rod mechanism is connected with the swing arm (424) through a universal joint, and the front end of the swing arm (424) is pivoted with the pressing block (35).

6. A spherical grinding apparatus as set forth in claim 5, wherein: the bottom of the panel (102) is provided with a guide rail (5) which is parallel to the panel and is perpendicular to the first rotating shaft (1021), a guide plate (431) is hung on the guide rail (5) in a sliding manner, the guide plate (431) is movably inserted into a vertically extending through hole formed in the swing arm (424), and the lower end of the guide plate (431) is connected with a limiting plate (425) which is positioned below the swing arm (424) and used for limiting the swing arm.

7. A spherical grinding apparatus according to any one of claims 1 to 6, wherein: the workpiece positioning device is characterized by further comprising a workpiece positioning jig (9), wherein the workpiece positioning jig (9) is coaxial with the rotating output shaft (2011) in a vertical state.

8. The spherical grinding apparatus as claimed in claim 7, wherein: the workpiece positioning jig (9) is connected with a rotation driving mechanism for driving the workpiece positioning jig to rotate.

9. The spherical grinding apparatus as claimed in claim 1, wherein: the upper surface of panel (102) is provided with balancing weight (11), balancing weight (11) are located the top of jacking cylinder (2).

10. The spherical grinding apparatus as claimed in claim 9, wherein: the cylinder shaft of the jacking cylinder (2) is connected with the panel (102) through an elastic buffer piece (20).

11. The method of the spherical surface grinding device is characterized in that:

s1: the cylinder shaft of the jacking cylinder (2) retracts, so that the panel (102) rotates around the first rotating shaft (1021) to be in an inclined state with a high front end and a low rear end;

s2: mounting the grinding disc (7) on a ball head connecting piece (321) at the lower end of the rotating shaft (32); and placing the port plate in an upper position;

s3: a cylinder shaft of the jacking cylinder (2) extends out to drive the panel (102) to rotate reversely around the first rotating shaft (1021) to reset until the panel (102) is in a horizontal state, and the grinding disc (7) is in contact with the grinding surface of the valve plate;

s4: an upper rotating motor (31) is started to drive the rotating shaft (32) to rotate the grinding disc (7) and/or a lower rotating motor (91) is started to drive the workpiece positioning jig (9) to drive the valve plate to rotate for grinding, and in the whole working process or part of working time of the upper rotating motor (31), the swinging motor (41) is started to drive the rotating shaft (32) to swing in a reciprocating mode.