Universal joint bell housing workpiece positioning tool

Abstract

The invention discloses a universal joint bell-shaped shell workpiece positioning tool, and relates to a positioning tool, the universal joint bell-shaped shell workpiece positioning tool comprises a tool bottom plate and a sphere tool, the sphere tool is provided with a deformation bag body, and a conical sleeve hole is formed in the sphere tool; a piston barrel is arranged at the position of the tool bottom plate, a piston piece is arranged in the piston barrel, a moving rod is sleeved on the piston piece, a pushing component is arranged at the position of the moving rod, and a cone plug sleeve is arranged at the position of the moving rod. According to the positioning tool, after the conical plug sleeve is pushed into the conical sleeve hole through the pushing part, the deformed capsule body is conveniently pushed out of the surface of the spherical tool into an inner cavity of the workpiece, and the workpiece is clamped in the inner cavity of the workpiece through the clamping part. According to the positioning tool, the clamping part is arranged on the piston cylinder, so that the mutual dislocation influence of the tool and the workpiece in the positioning process is reduced, air in the piston cylinder is pushed into the hooping part in the pushing process, the stability of the workpiece is kept, light irradiated by the laser lamp is beneficial to positioning on the workpiece, and a center hole is convenient to machine.

Description

Technical Field

[0001] The present invention relates to the technical field of positioning tooling, and specifically to a positioning tooling for a universal joint bell housing workpiece. Background Art

[0002] The bell housing is a main component of a constant velocity universal joint. Its inner spherical surface groove has a special and complex shape. After rough machining of the bell housing, it is necessary to locate the center hole position of the workpiece to facilitate subsequent finish machining and machining after internal cavity heating. When machining the center hole of the rough-machined universal joint bell housing tooling, a positioning tooling is usually required to assist in the center hole machining.

[0003] The existing positioning tooling used is as shown in the appendix Figure 1 As shown. The bottom is a cylindrical structure. A protrusion is provided on the top of the cylinder to fit the inner wall of the bell-shaped workpiece. A clamping block that fits the groove of the inner wall of the bell housing is provided on the outside of the protrusion. Then, a pressing plate is provided outside the bell housing. The workpiece is placed on the positioning seat for positioning. The pressing plate descends to press the bell housing. The end face of the rod part of the main shaft starts to drill the center hole. However, due to the large perpendicularity error between the inner cavity positioning surface and the pressing plane of the product, and the pressing plane is produced by warm forging and often has protrusion defects. When pressing, the workpiece will deflect a certain angle along the arc surface of the positioning seat, and the drilled center hole will be offset from the inner cavity center. Moreover, when drilling a positioning hole on the cylinder of the bell housing, after the drilling equipment such as a drill bit acts on the top position of the bell housing, it is easy to cause the bell housing to shake, and the position of the inner cavity and the outer circle of the precision-turned part is offset. It is extremely easy to produce waste products in the subsequent finish machining after internal cavity heating. Therefore, we propose a positioning tooling for a universal joint bell housing workpiece. Summary of the Invention

[0004] The purpose of the present invention is to provide a positioning tooling for a universal joint bell housing workpiece to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A positioning tooling for a universal joint bell housing workpiece, including a tooling base plate. A spherical tooling is installed on the tooling base plate. A plurality of deformation capsules adapted to the inner wall of the workpiece are provided on the spherical tooling. A tapered sleeve hole is provided inside the spherical tooling. A piston cylinder body is installed at the bottom of the tooling base plate. A piston piece is provided inside the piston cylinder body. A moving rod that moves inside the piston cylinder body is sleeved on the piston piece. A pushing component is installed at the bottom of the moving rod, and a tapered plug sleeve that is inserted into the tapered sleeve hole is installed at the top of the moving rod. A tightening component is provided outside the workpiece. The tightening component includes a positioning rod group. The positioning rod group is communicated with the piston cylinder body through an air guide pipe. The positioning rod group wraps around the outside of the workpiece, and a laser lamp is installed at the top of the positioning rod group. The intersection point of the light rays emitted by the laser lamp is projected on the top of the workpiece. When the pushing component pushes the tapered plug sleeve to move, the deformation capsules of the spherical tooling are extruded, and the pushing component drives the air pressure change inside the piston cylinder body.

[0006] Preferably, fixing grooves are provided both at the lower and upper parts of the spherical tooling, and a positioning block is installed on the fixing groove at the top. A plurality of buffer pads are installed on the tooling bottom plate.

[0007] Preferably, the top of the piston cylinder body is a flange mounting surface, and the flange mounting surface is installed at the bottom of the tooling bottom plate. A cavity plate is provided at the top of the piston cylinder body, and a hole for the movement rod is formed on the cavity plate. The inside of the movement rod is a cavity.

[0008] Preferably, a connecting rod is installed on the conical plug sleeve, and a positioning piece is fixed on the connecting rod. The positioning piece is located on the top of the positioning block, and the center of the positioning piece is a round hole.

[0009] Preferably, the pushing component includes a pushing plate installed at the bottom of the movement rod, and a plurality of springs are installed between the pushing plate and the bottom of the piston cylinder body. A pushing groove is provided at the bottom of the pushing plate, and a notch communicating with the cavity of the movement rod is provided on the pushing groove.

[0010] Preferably, a plurality of protruding blocks are installed on the outer side of the pushing plate at equal angles. A clamping column is installed on the top of the protruding block. A plurality of clamping grooves are provided at the bottom of the piston cylinder body, and a pressing piece is provided on the clamping column.

[0011] Preferably, the tightening component further includes a release curved rod. A release sphere is installed at the bottom of the release curved rod. A plurality of gas collecting ring pipes are provided on the release curved rod. A shrinkable air pipe is communicated with the gas collecting ring pipes. The shrinkable end of the shrinkable air pipe is slidably sleeved in the gas collecting ring pipes. A movable plug piece is provided in the gas collecting ring pipes, and the movable plug piece and the end of the shrinkable air pipe are connected by a mounting pin 842. A piercing rod for piercing the movable plug piece is provided in the gas collecting ring pipes. The shrinkable air pipe is a circular pipe wrapped around the outer wall of the workpiece. A clamping curved rod is installed on the shrinkable air pipe, and a guide air sphere communicated with a guide air pipe is provided on the clamping curved rod.

[0012] Preferably, a plurality of fitting plug blocks are provided on the release curved rod and the clamping curved rod.

[0013] Preferably, a plurality of pressing protrusions are installed on the inner wall of the conical sleeve hole, and the pressing protrusions correspond to the deformation bladder.

[0014] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, a spherical tooling is arranged to be inserted into the workpiece. A deformable bladder is arranged on the spherical tooling. After a conical sleeve is pushed into a conical sleeve hole by a pushing component, it is convenient to push the deformable bladder from the surface of the spherical tooling into the inner cavity of the workpiece, thereby reducing the mutual misalignment between the tooling and the workpiece during the positioning process. At the same time, during the pushing process, it is convenient to push the air inside the piston cylinder to the clamping component, which is beneficial to maintaining the stability of the workpiece. After the positioning rod group clamps the workpiece, the light irradiated by the laser lamp is beneficial to positioning on the workpiece, facilitating the machining of the center hole.

[0015] In the present invention, the clamping component is arranged as a gas collecting ring pipe and a shrinkable air pipe, and the diameters of each layer are different, which is beneficial to clamping the workpiece stably.

[0016] The fixing grooves designed at the bottom and top of the spherical tooling in the present invention facilitate the release of the spherical tooling. At the same time, a buffer pad is installed on the tooling bottom plate. After the spherical tooling cooperates and enters the workpiece, it slows down the wear of the tooling bottom plate on the bottom of the workpiece, and is beneficial to releasing the stress of the spherical tooling after being pressed, avoiding the wear of the spherical tooling under pressure. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the workpiece and the existing tooling; Figure 2 It is a schematic structural diagram of the whole of the present invention; Figure 3 It is a schematic side structural diagram of the present invention; Figure 4 It is a schematic partial cross-sectional structural diagram of the present invention; Figure 5 It is a schematic structural diagram of the spherical tooling of the present invention; Figure 6 It is a schematic bottom view structural diagram of the spherical tooling of the present invention; Figure 7 It is a schematic structural diagram of the present invention after removing the piston cylinder; Figure 8 It is Figure 7 The schematic structural diagram after removing the spherical tooling in Figure 9 It is a schematic partial cross-sectional structural diagram of the piston cylinder of the present invention; Figure 10 It is a schematic partial cross-sectional structural diagram of the spherical tooling of the present invention; Figure 11 Schematic structural diagram of the shrinkable air pipe and the gas collecting ring pipe.

[0018] In the figure: 1, tooling base plate; 2, spherical tooling; 3, piston cylinder body; 4, piston piece; 5, moving rod; 6, pushing component; 7, conical plug sleeve; 8, clamping component; 21, deformable bladder; 22, conical sleeve hole; 23, fixing groove; 24, positioning block; 25, buffer pad; 26, pressing projection; 31, flange mounting surface; 32, cavity plate; 61, pushing plate; 62, spring; 63, pushing groove; 64, notch; 65, protruding block; 66, engaging column; 67, engaging groove; 71, connecting rod; 72, positioning piece; 81, air guide pipe; 82, releasing sphere; 83, gas collecting ring pipe; 84, shrinking air pipe; 85, clamping curved rod; 86, guiding spherical body; 87, fitting plug block; 88, releasing curved rod; 89, laser lamp; 841, movable plug piece; 842, mounting pin; 843, piercing rod. Detailed implementation mode

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] The present invention provides a technical solution: a positioning tooling for a universal joint bell housing workpiece. The designed tooling is used to solve the trouble of drilling a center hole for the bell housing workpiece used in the universal joint, including a tooling base plate 1. A spherical tooling 2 is installed on the tooling base plate 1. A plurality of deformable bladders 21 adapted to the inner wall of the workpiece are provided on the spherical tooling 2. A conical sleeve hole 22 is provided inside the spherical tooling 2; Fixing grooves 23 are provided both at the lower part and the upper part of the spherical tooling 2, and a positioning block 24 is installed on the fixing groove 23 at the top. A plurality of buffer pads 25 are installed on the tooling base plate 1. As shown in the attached Figure 5 and the attached Figure 6 figures, the whole of the spherical tooling 2 is a sphere, and depressions less than half of the radius are dug at the top and bottom. A concave groove is provided on the surface of the spherical tooling 2, so as to facilitate the deformation of the deformable bladder 21 at the concave groove on the surface of the spherical tooling 2.

[0021] A piston cylinder body 3 is installed at the bottom of the tooling base plate 1. The top of the piston cylinder body 3 is a flange mounting surface 31, and the flange mounting surface 31 is installed at the bottom of the tooling base plate 1. A cavity plate 32 is provided at the top of the piston cylinder body 3. A piston piece 4 is provided inside the piston cylinder body 3. A moving rod 5 that moves inside the piston cylinder body 3 is sleeved on the piston piece 4. A hole for passing the moving rod 5 is provided on the cavity plate 32. The inside of the moving rod 5 is a cavity. When the moving rod 5 drives the piston piece 4 to move inside the piston cylinder body 3, the air pressure inside the piston cylinder body 3 is changed. A conical plug sleeve 7 that is inserted into the conical sleeve hole 22 is installed at the top of the moving rod 5; To facilitate the movement of the moving rod 5 to drive the conical plug sleeve 7, a pushing component 6 is installed at the bottom of the moving rod 5. The design of the pushing component 6 is as shown in the attached Figure 2 - attached Figure 4 , attached Figure 7 - attached Figure 9 figure. The pushing component 6 includes a pushing plate 61 installed at the bottom of the moving rod 5, and a plurality of springs 62 are installed between the pushing plate 61 and the bottom of the piston cylinder body 3. A pushing groove 63 is provided at the bottom of the pushing plate 61, and a notch 64 communicating with the cavity of the moving rod 5 is provided on the pushing groove 63. By manually pushing the pushing plate 61, or by using other pushing devices such as a telescopic cylinder, the pushing plate 61 drives the moving rod 5 to move. When the moving rod 5 is driven to move, since the conical plug sleeve 7 is fixedly installed on the moving rod 5, the moving rod 5 drives the conical plug sleeve 7 into the conical sleeve hole 22 inside the spherical tooling 2, and then the spherical tooling 2 starts to expand from the spherical shape, and the deformation bladder 21 overflows along the recessed groove provided on the surface of the spherical tooling 2 and fills the groove fitting the inner wall of the bell-shaped shell; To increase the fastening force after the pushing plate 61 is pushed, a plurality of protruding blocks 65 are installed at equal angles on the outer side of the pushing plate 61. A clamping column 66 is installed on the top of the protruding block 65, and a plurality of clamping grooves 67 are provided at the bottom of the piston cylinder body 3. A pressing piece is provided on the clamping column 66, and the pressing piece can be pressed on the clamping column 66. When the pushing plate 61 faces the bottom of the piston cylinder body 3 and the clamping column 66 advances towards the clamping groove 67, the design of the clamping groove 67 is as shown in the attached Figure 7 figure. A circular hole for the clamping groove 67 is opened on the plate at the bottom of the piston cylinder body 3, and a strip-shaped groove is opened on the outer wall of the circular hole. The strip-shaped groove can be adapted to the pressing piece of the clamping column 66. During the process of the clamping column 66 advancing towards the clamping groove 67, the pressing piece is compressed until the pressing piece is stuck from the strip-shaped groove. At this time, the spring 62 pushes in the linear direction of the moving rod 5, so that the clamping column 66 is stably engaged in the clamping groove 67.

[0022] Meanwhile, to keep the outside of the workpiece stable, a tightening component 8 is provided outside the workpiece. The tightening component 8 includes a positioning rod group. A gas guide pipe 81 is connected between the positioning rod group and the piston cylinder body 3. The positioning rod group wraps around the outside of the workpiece, and a laser lamp 89 is installed at the top of the positioning rod group. The laser lamp 89 selects a common model. Since the laser lamp 89 is installed at the top of the positioning rod group and its height is about higher than the height of the workpiece, the designed positioning rod group in the scheme is composed of three rod bodies, and the three-point positioning method is adopted. The laser lamp 89 emits a laser ray passing through the center of the workpiece, and the intersection point of the three laser rays is the center position of the workpiece. The projection of the intersection point of the light rays emitted by the laser lamp 89 is on the top of the workpiece, and the drilling equipment aligns with the laser intersection point for drilling processing, which is convenient for machining the center hole of the workpiece.

[0023] When the pushing member 6 pushes the conical plug sleeve 7 to move, the deformable bladder 21 of the sphere tooling 2 is extruded, and the deformable bladder 21 overflows from the position of the concave groove on the surface of the sphere tooling 2, so as to fit on the position of the concave groove in the inner cavity of the workpiece. The spherical surface of the sphere tooling 2 fits the spherical surface position in the inner cavity of the workpiece, thus maintaining a stable clamping of the sphere.

[0024] When the pushing member 6 pushes the conical plug sleeve 7 to move, the air pressure in the piston cylinder 3 changes, and the gas in the piston cylinder 3 is squeezed into the clamping member 8. The clamping member 8 further includes a release curved lever 88. A release sphere 82 is installed at the bottom of the release curved lever 88. Multiple layers of gas collecting ring pipes 83 are arranged on the release curved lever 88. A shrinkage air pipe 84 is communicated with the gas collecting ring pipe 83. The shrinkage end of the shrinkage air pipe 84 is slidably sleeved in the gas collecting ring pipe 83. A movable plug piece 841 is arranged in the gas collecting ring pipe 83, and the movable plug piece 841 is connected with the end of the shrinkage air pipe 84 through a mounting pin 842. A puncturing rod 843 for puncturing the movable plug piece 841 is arranged in the gas collecting ring pipe 83. The shrinkage air pipe 84 is a circular pipe wrapped around the outer wall of the workpiece. A clamping curved lever 85 is installed on the shrinkage air pipe 84, and a gas guiding sphere 86 communicated with the air guiding pipe 81 is arranged on the clamping curved lever 85. Each layer of the gas collecting ring pipe 83 and the shrinkage air pipe 84 are combined into a complete ring body wrapped around the outside of the workpiece. Because the outer part of the bell-shaped housing of the universal joint is a cylinder with a gradually changing diameter, as shown in Figure 2 - attached Figure 4 , and attached Figure 7 - attached Figure 10 shown in, the overall design of the release curved lever 88 and the clamping curved lever 85 imitates the shape of the bell-shaped housing workpiece. The diameter of the complete ring body formed by combining each layer of the gas collecting ring pipe 83 and the shrinkage air pipe 84 is different according to the size of the bell-shaped housing workpiece. From top to bottom of the workpiece, the diameter of the ring body gradually increases. When the gas in the piston cylinder 3 enters the shrinkage air pipe 84 from one of the air guiding pipes 81, the shrinkage air pipe 84 discharges gas to both ends, causing the shrinkage air pipe 84 to shrink towards the gas collecting ring pipe 83 at both ends, resulting in the complete ring body formed by combining the gas collecting ring pipe 83 and the shrinkage air pipe 84 starting to shrink and wrap around the outside of the bell-shaped housing workpiece. After positioning the inner cavity of the workpiece, the clamping and positioning of the outside of the workpiece are increased, which is beneficial to maintaining the stability of the whole workpiece.

[0025] In order to increase the clamping force on the outside of the workpiece, a plurality of fitting plug blocks 87 are provided on the release curved rod 88 and the clamping curved rod 85. After the release curved rod 88 and the clamping curved rod 85 contract and clamp on the outside of the workpiece, the fitting plug blocks 87 are pressed against the surface of the workpiece. The fitting plug blocks 87 are made of soft materials such as cloth, rubber, etc., which reduces the wear of the fitting plug blocks 87 on the surface of the workpiece. At the same time, since the fitting plug blocks 87 are in contact with the surface of the workpiece, the release curved rod 88 and the clamping curved rod 85 are prevented from directly pressing against the surface of the workpiece. When the machining of the center position of the workpiece is completed, at this time, the gas in the gas collecting ring pipe 83 is released by opening the release sphere 82, and then the combined ring body is reopened to facilitate the removal of the workpiece.

[0026] In order to achieve a buffering and shock-absorbing effect on the inner cavity of the workpiece when the drilling device machines the center hole of the workpiece and prevent damage to the inner cavity of the workpiece, a connecting rod 71 is installed on the conical plug sleeve 7, and a positioning piece 72 is fixed on the connecting rod 71. The positioning piece 72 is located on top of the positioning block 24. The center of the positioning piece 72 is a round hole. After the conical plug sleeve 7 is completely inserted into the conical sleeve hole 22, at this time, the positioning piece 72 is just positioned at the top position of the inner cavity of the workpiece.

[0027] In order to assist the conical plug sleeve 7 in extruding the deformation bladder 21 on the spherical tooling 2, a plurality of pressing protrusions 26 are installed on the inner wall of the conical sleeve hole 22, and the pressing protrusions 26 correspond to the deformation bladder 21. After the conical plug sleeve 7 enters the conical sleeve hole 22 and contacts the pressing protrusions 26, since the pressing protrusions 26 correspond to the concave grooves on the spherical tooling 2, the deformation bladder 21 on the spherical tooling 2 is more easily extruded.

[0028] During use, first, the device is assembled. The two ends of the shrinkable air pipe 84 and the air collecting ring pipe 83 are detachable. That is, the two ends of the shrinkable air pipe 84 are slidably installed inside the air collecting ring pipe 83 and sealed at the insertion position by a detachable sealing ring. First, the air collecting ring pipe 83 and the shrinkable air pipe 84 are disassembled. The moving rod 5 and the piston piece 4 are installed inside the piston cylinder body 3. Then, the mounting holes at the bottom of the tooling bottom plate 1 are aligned with the flange mounting surface 31 at the top of the piston cylinder body 3 and fixed. In this way, the piston cylinder body 3, the conical plug sleeve 7, and the spherical tooling 2 are combined into a whole. Before the spherical tooling 2 is pushed into the inner cavity of the workpiece, the recessed groove formed on the surface of the spherical tooling 2 is aligned with the recessed groove in the inner cavity of the workpiece. Then, hold the piston cylinder body 3 and insert the spherical tooling 2 into the inner cavity of the workpiece. At this time, the air collecting ring pipe 83 and the shrinkable air pipe 84 can be assembled. Then, by pushing the push plate 61 forward until the cylinder at the front end of the engaging column 66 enters the inside of the engaging groove 67, the pressing piece on the surface of the engaging column 66 can be pressed and contracted. When the push plate 61 is continuously pushed, the pressing piece is pressed until the pressing piece overflows from the groove frame on the outer wall of the engaging groove 67, and the push plate 61 is stabilized at the bottom position of the piston cylinder body 3. During the forward pushing process of the push plate 61, the conical plug sleeve 7 connected to the moving rod 5 starts to enter the conical sleeve hole 22. After the conical plug sleeve 7 enters the inside of the conical sleeve hole 22 and contacts the pressing protrusion 26, because the pressing protrusion 26 and the recessed groove on the spherical tooling 2 correspond to each other, the deformable bladder 21 on the spherical tooling 2 is more easily extruded. In this way, the spherical surface of the spherical tooling 2 fits against the arc surface in the inner cavity of the workpiece, and the deformable bladder 21 fits against the recessed groove in the inner cavity of the workpiece. Moreover, the overall design of the release lever 88 and the clamping lever 85 imitates the shape of the bell-shaped housing workpiece. The combined complete ring body formed by each layer of the air collecting ring pipe 83 and the shrinkable air pipe 84 has a gradually increasing ring diameter from top to bottom according to the size of the bell-shaped housing workpiece. When the gas in the piston cylinder body 3 enters the shrinkable air pipe 84 through one of the air guide pipes 81, the shrinkable air pipe 84 discharges gas towards both ends. The gas drives the movable piston piece 841 to move along the air collecting ring pipe 83. Since the movable piston piece 841 is fixedly connected to the shrinkable end of the shrinkable air pipe 84 through the mounting pin 842, the two ends of the shrinkable air pipe 84 contract towards the air collecting ring pipe 83, causing the combined complete ring body of the air collecting ring pipe 83 and the shrinkable air pipe 84 to start contracting and wrapping around the outside of the bell-shaped housing workpiece. After positioning the inner cavity of the workpiece, the clamping and positioning of the outside of the workpiece are increased, which is conducive to maintaining the stability of the entire workpiece. When releasing the workpiece, by pressing and twisting the air collecting ring pipe 83, the puncturing rod 843 pierces the movable piston piece 841, and then the gas is discharged. After the release lever 88 and the clamping lever 85 are distributed at three points on the cylinder of the workpiece, at this time, the laser lamp 89 emits a laser ray passing through the center of the workpiece. The intersection point of the three laser rays is the center position of the workpiece. The projection of the intersection point of the light rays emitted by the laser lamp 89 is on the top of the workpiece. The drilling equipment is aligned with the laser intersection point for drilling processing, which is convenient for machining the center hole of the workpiece.

[0029] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning tooling for a universal joint bell housing workpiece, comprising a tooling base plate (1), characterized in that: A sphere tooling (2) is installed on the tooling base plate (1). A plurality of deformation bladder bodies (21) adapted to the inner wall of the workpiece are provided on the sphere tooling (2). A tapered sleeve hole (22) is provided inside the sphere tooling (2). A piston cylinder body (3) is installed at the bottom of the tooling base plate (1). A piston piece (4) is provided inside the piston cylinder body (3). A moving rod (5) that moves inside the piston cylinder body (3) is sleeved on the piston piece (4). A pushing component (6) is installed at the bottom of the moving rod (5), and a tapered plug sleeve (7) inserted into the tapered sleeve hole (22) is installed at the top of the moving rod (5). A tightening component (8) is provided outside the workpiece. The tightening component (8) includes a positioning rod group. The positioning rod group and the piston cylinder body (3) are connected by an air guide pipe (81). The positioning rod group wraps around the outside of the workpiece, and a laser lamp (89) is installed at the top of the positioning rod group. The intersection point of the light rays emitted by the laser lamp (89) is projected on the top of the workpiece. When the pushing component (6) pushes the tapered plug sleeve (7) to move, the deformation bladder bodies (21) of the sphere tooling (2) are extruded, and the pushing component (6) drives the air pressure change inside the piston cylinder body (3).

2. The positioning tooling for a universal joint bell housing workpiece according to claim 1, characterized in that: Fixing grooves (23) are provided at both the lower and upper parts of the sphere tooling (2), and a positioning block (24) is installed on the fixing groove (23) at the top. A plurality of buffer pads (25) are installed on the tooling base plate (1).

3. The positioning tooling for a universal joint bell housing workpiece according to claim 1, characterized in that: The top of the piston cylinder body (3) is a flange mounting surface (31), and the flange mounting surface (31) is installed at the bottom of the tooling base plate (1). A cavity plate (32) is provided at the top of the piston cylinder body (3), and a hole for passing the moving rod (5) is provided on the cavity plate (32). The inside of the moving rod (5) is a cavity.

4. The positioning tooling for a universal joint bell housing workpiece according to claim 2, characterized in that: A connecting rod (71) is installed on the tapered plug sleeve (7), and a positioning piece (72) is fixed on the connecting rod (71). The positioning piece (72) is located on the top of the positioning block (24). The center of the positioning piece (72) is a round hole.

5. A positioning tooling for a universal joint bell housing workpiece according to claim 3, characterized in that: The pushing component (6) includes a pushing plate (61) installed at the bottom of the moving rod (5). A plurality of springs (62) are installed between the pushing plate (61) and the bottom of the piston cylinder body (3). A pushing groove (63) is provided at the bottom of the pushing plate (61), and a notch (64) communicating with the cavity of the moving rod (5) is provided on the pushing groove (63).

6. A positioning tooling for a universal joint bell housing workpiece according to claim 5, characterized in that: A plurality of protruding blocks (65) are installed on the outside of the pushing plate (61) at equal angles. A clamping column (66) is installed on the top of the protruding block (65). A plurality of clamping grooves (67) are provided at the bottom of the piston cylinder body (3). A pressing piece is provided on the clamping column (66).

7. A positioning tooling for a universal joint bell housing workpiece according to claim 1, characterized in that: The clamping component (8) further includes a release curved rod (88), a release sphere (82) is installed at the bottom of the release curved rod (88), a plurality of gas collecting ring pipes (83) are arranged on the release curved rod (88), a contraction air pipe (84) is communicated with the gas collecting ring pipe (83), the contraction end of the contraction air pipe (84) is slidably sleeved in the gas collecting ring pipe (83), a movable plug piece (841) is arranged in the gas collecting ring pipe (83), and the movable plug piece (841) is connected with the end of the contraction air pipe (84) through a mounting pin (842). A puncturing rod (843) for puncturing the movable plug piece (841) is arranged in the gas collecting ring pipe (83). The contraction air pipe (84) is a circular pipe wrapped around the outer wall of the workpiece, a clamping curved rod (85) is installed on the contraction air pipe (84), and a guide gas sphere (86) communicated with the air guide pipe (81) is arranged on the clamping curved rod (85).

8. A positioning tooling for a universal joint bell housing workpiece according to claim 7, characterized in that: A plurality of fitting plug blocks (87) are arranged on the release curved rod (88) and the clamping curved rod (85).

9. The positioning tooling for a universal joint bell housing workpiece according to claim 1, wherein: A plurality of pressing protrusions (26) are installed on the inner wall of the conical sleeve hole (22), and the pressing protrusions (26) correspond to the deformation bladder (21).

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