阅读说明：本技术 一种复杂焊接件的车用工装 (Automobile-used frock of complicated welding ) 是由 居大伟 罗聪慧 吴昌盛 罗觉亮 张伟 马慧 马武 孙龙 李兴民 陈波 于 2021-09-15 设计创作，主要内容包括：一种复杂焊接件的车用工装,过渡盘正面设有用于支撑复杂焊接件的支撑组件、用于压紧复杂焊接件的压紧组件、配重组件,所述支撑组件包括与复杂焊接件的法兰盘盘缘相对应的主支撑件、与复杂焊接件的细圆柱段相对应的辅助活动支撑件,所述主支撑件有与法兰盘盘缘相适配的大定位槽,辅助活动支撑件上设有与细圆柱段相对应的小定位槽；所述压紧组件包括用于压紧加强筋的压紧组件一,用于压紧辅圆柱段的压紧组件二。通过本发明的车用工装的各组件之间的配合可快速找正复杂焊接件。找正工装位置后,后续不需要进行调整,提高了装夹效率,大大保证了工件的产出速度,保证了生产节奏,解决生产窄口。(A vehicle tool for complex welding parts is characterized in that a supporting assembly for supporting the complex welding parts, a pressing assembly for pressing the complex welding parts and a counterweight assembly are arranged on the front face of a transition disc, the supporting assembly comprises a main supporting piece corresponding to the flange disc edge of the complex welding parts and an auxiliary movable supporting piece corresponding to a thin cylindrical section of the complex welding parts, the main supporting piece is provided with a large positioning groove matched with the flange disc edge, and the auxiliary movable supporting piece is provided with a small positioning groove corresponding to the thin cylindrical section; the pressing assembly comprises a first pressing assembly used for pressing the reinforcing ribs and a second pressing assembly used for pressing the auxiliary cylindrical sections. The complex welding parts can be quickly aligned through the matching of all components of the vehicle tool. After the position of the tool is aligned, subsequent adjustment is not needed, the clamping efficiency is improved, the output speed of a workpiece is greatly guaranteed, the production rhythm is guaranteed, and the problem of narrow opening production is solved.)

1. The utility model provides an automobile-used frock of complicated welding, its characterized in that: the front surface of the transition disc (3) is provided with a supporting component for supporting the complex welding part, a pressing component for pressing the complex welding part and a counterweight component;

the complex welding part (2) comprises a main cylindrical section, a transition cylindrical section (208) and an auxiliary cylindrical section (205); the main cylindrical section is of a step-shaped structure and comprises a thick cylindrical section (201) located at the front end and a thin cylindrical section (202) located at the rear end, a circle of flange plate (204) is arranged on the excircle of the rear end of the thick cylindrical section (201), a circle of reinforcing rib (203) is arranged between the flange plate (204) and the excircle of the thin cylindrical section (202), the lower end of the main cylindrical section is connected with an auxiliary cylindrical section (205), the axis of the main cylindrical section is overlapped with the axis of the transition disc (3), the included angle between the axis of the main cylindrical section and the axis of the auxiliary cylindrical section (205) is a, and the included angle between the axis of the transition cylindrical section (208) and the axis of the auxiliary cylindrical section is a 1;

the supporting assembly comprises a main supporting piece (1) corresponding to the flange (204) of the complex welding piece and an auxiliary movable supporting piece (5) corresponding to the thin cylindrical section (202) of the complex welding piece, the main supporting piece (1) is provided with a large positioning groove (101) matched with the flange (204), and the auxiliary movable supporting piece (5) is provided with a small positioning groove (505) corresponding to the thin cylindrical section (202);

the pressing assembly comprises a first pressing assembly (90) used for pressing the reinforcing ribs (203) and a second pressing assembly (130) used for pressing the auxiliary cylindrical section.

2. The tooling for the complex weldment of claim 1, wherein: the auxiliary movable supporting piece (5) comprises a positioning plate group and a screw rod (503), wherein a spherical movable joint is arranged at the end part of the screw rod (503), a small positioning groove (505) is arranged on the positioning plate group, an adjusting annular groove matched with the spherical movable joint is arranged at the lower part of the positioning plate group, and the spherical movable joint is in clearance fit with the adjusting annular groove.

3. The tooling for the complex weldment of claim 2, wherein: the locating plate group comprises a locating plate (501) and a fixing plate (502), the locating plate (501) is connected with the fixing plate (502) through a bolt (504), a hemispherical groove is formed in the locating plate (501), a notch hole corresponding to the hemispherical groove is formed in the fixing plate (502), the notch hole comprises a spherical neck hole and a cylindrical hole connected to the spherical neck hole, and a complete adjusting annular groove is formed after the hemispherical groove is in butt joint with the notch hole.

4. The tooling for the complex weldment of claim 3, wherein: the spherical movable joint comprises a hemispherical portion (506) positioned on the upper portion and a ball neck portion connected to the lower portion of the hemispherical portion (506), the hemispherical portion (506) is matched with the hemispherical groove, the ball neck portion is matched with the ball neck hole, and the cylindrical hole is matched with a screw rod portion (507) on the lower portion of the ball neck portion.

5. The tooling for the complex weldment of claim 1, wherein: the first compression assembly (90) comprises a first locking screw rod (7), a first pressure plate (9), a first support screw rod (8) positioned below the head of the first pressure plate (9), and an adjusting screw rod (6) positioned below the tail of the first pressure plate (9), the first pressure plate (9) is arranged at the upper end of the locking screw rod (7) through a locking nut (18), and the first locking screw rod (7) is positioned between the first support screw rod (8) and the adjusting screw rod (6); when the first pressing component (90) works, the upper end of the first supporting screw rod (8) is abutted against the lower surface of the reinforcing rib (203) of the workpiece, the head of the first pressing plate (9) is pressed on the upper surface of the reinforcing rib (203) of the workpiece, and the upper end of the adjusting screw rod (6) is abutted against the tail of the first pressing plate (9).

6. The tooling for the complex weldment of claim 5, wherein: the main supporting piece (1) consists of a front vertical plate (104), a rear vertical plate (103) and a bottom plate (105) connected between the front vertical plate and the rear vertical plate;

the large positioning groove (101) is positioned at the upper part of the front vertical plate (104); the front part of the bottom plate (105) is provided with an assembly hole group matched with the first pressing component (90), each assembly hole group comprises three threaded holes, and the three threaded holes are respectively an assembly hole I (106) matched with the adjusting screw rod (6), an assembly hole II (107) matched with the locking screw rod I (7) and an assembly hole III (108) matched with the supporting screw rod I (8); the rear part of the bottom plate (105) is provided with a mounting hole (51) matched with the auxiliary movable support piece (5);

the number of the first pressing assemblies (90) is two, and two groups of assembling hole groups are symmetrically arranged on the left and right of the front part of the bottom plate (105).

7. The tooling for the complex weldment of claim 6, wherein: the large positioning groove (101) and the small positioning groove (505) are both V-shaped; the large positioning groove (101) is symmetrically provided with a left positioning block (14) and a right positioning block (15), the left positioning block (14) and the right positioning block (15) respectively comprise a positioning part and a bending part which are attached to the groove wall of the large positioning groove (101), the bending part is attached to the front vertical plate (104), and the bending part is fixed on the front vertical plate (104) through a first bolt (20).

8. The tooling for the complex weldment of claim 1, wherein: the counterweight component comprises a counterweight block (16) and a counterweight bolt (23); the balancing weight (16) is a cylindrical truncated body, and the cylindrical truncated body of the balancing weight (16) is formed by rectangular truncation parallel to the axis of the cylinder; the transition disc (3) is provided with a plurality of adjusting holes for adjusting the positions of the balancing weights (16), and the tail ends of the balancing weights (23) are arranged at the adjusting holes; a positioning block (141) which is abutted against the back surface of the flange plate (204) is arranged above the balancing weight (16).

9. The tooling for the complex weldment of claim 1, wherein: the counterweight component is arranged opposite to the main supporting piece (1).

10. The tooling for the complex weldment of claim 1, wherein: the second compression assembly (130) comprises a second compression plate (13) corresponding to the top of the auxiliary cylindrical section, a second locking screw (11) matched and assembled with the second compression plate (13), a second support screw (10) corresponding to the bottom of the auxiliary cylindrical section and a third support screw (12), and the second locking screw (11), the second support screw (10) and the third support screw (12) are all arranged on the transition disc (3).

Technical Field

The invention relates to a clamp, in particular to a vehicle tool for a welding part with a complex shape, which is applied to turning the outer circle of the welding part.

Background

When the complex welding part needs to process the excircle, the complex shape of the workpiece can not be clamped by directly turning on a lathe, and the excircle is bored on the boring lathe in the traditional technology. The workpiece requires a cylindrical roughness of 1.6. In the traditional machining method, a workpiece is clamped on a workbench by using a V-shaped block and a pressing plate, and the excircle is bored after alignment according to scribing. According to the method, the outer circle is bored by the boring cutter, the rotating speed of the boring cutter is not too high, so that the feed amount is small, the machining time is long, the efficiency is low, the formed cutter grains are large, the roughness cannot reach 1.6 required by a workpiece, and the workpiece is unqualified.

Disclosure of Invention

The invention aims to design a vehicle tool for a complex welding part, and manufacture a set of vehicle fixture which enables the complex-shaped welding part to be processed on a lathe, so that the problems of low excircle processing efficiency and unqualified roughness of the complex-shaped welding part are solved, and the production and processing requirements are met.

The technical scheme of the invention is as follows: the front surface of the transition disc is provided with a supporting component for supporting the complex welding part, a pressing component for pressing the complex welding part and a counterweight component;

the complex welding part comprises a main cylindrical section, a transition cylindrical section and an auxiliary cylindrical section; the main cylindrical section is of a stepped structure and comprises a thick cylindrical section and a thin cylindrical section, the thick cylindrical section is located at the front end, the thin cylindrical section is located at the rear end, a circle of flange plate is arranged on the outer circle of the rear end of the thick cylindrical section, a circle of reinforcing rib is arranged between the flange plate and the outer circle of the thin cylindrical section, the lower end of the main cylindrical section is connected with the auxiliary cylindrical section, the axis of the main cylindrical section coincides with the axis of the transition disc, the included angle between the axis of the main cylindrical section and the axis of the auxiliary cylindrical section is a, a =3-7 degrees, the included angle between the axis of the transition cylindrical section and the axis of the auxiliary cylindrical section is a1, and a1=80-90 degrees.

The supporting component comprises a main supporting piece corresponding to the flange plate edge of the complex welding piece and an auxiliary movable supporting piece corresponding to the thin cylindrical section of the complex welding piece, the main supporting piece is provided with a large positioning groove matched with the flange plate edge, and the auxiliary movable supporting piece is provided with a small positioning groove corresponding to the thin cylindrical section;

the pressing assembly comprises a first pressing assembly used for pressing the reinforcing ribs and a second pressing assembly used for pressing the auxiliary cylindrical sections.

The auxiliary movable supporting piece comprises a positioning plate group and a screw rod, wherein a spherical movable joint is arranged at the end part of the screw rod, a small positioning groove is formed in the upper surface of the positioning plate group, an adjusting annular groove matched with the spherical movable joint is formed in the lower part of the positioning plate group, and the spherical movable joint is in clearance fit with the adjusting annular groove. The V-shaped gap between the ball head and the annular groove can swing within 1-3 degrees through the ball head joint.

The locating plate group comprises a locating plate and a fixing plate, the locating plate is connected with the fixing plate through a bolt, a hemispherical groove is formed in the locating plate, a notch hole corresponding to the hemispherical groove is formed in the fixing plate, the notch hole comprises a spherical neck hole and a cylindrical hole connected to the spherical neck hole, and a complete adjusting annular groove is formed after the hemispherical groove is in butt joint with the notch hole.

The spherical movable joint is an 3/4 ball and comprises a hemispherical part positioned on the upper part and a ball neck part connected to the lower part of the hemispherical part, the hemispherical part is matched with the hemispherical groove, the ball neck part is matched with the ball neck hole, and the cylindrical hole is matched with the screw part at the lower part of the ball neck part.

The first compression assembly comprises a first locking screw rod, a first pressure plate, a first support screw rod positioned below the head of the first pressure plate and an adjusting screw rod positioned below the tail of the first pressure plate, the first pressure plate is arranged at the upper end of the first locking screw rod through a locking nut, and the first locking screw rod is positioned between the first support screw rod and the adjusting screw rod; when the first pressing assembly works, the upper end of the supporting screw rod abuts against the lower surface of the reinforcing rib of the workpiece, one end of the pressing plate presses against the upper surface of the reinforcing rib of the workpiece, and the upper end of the adjusting screw rod abuts against the tail of the pressing plate.

The main supporting piece consists of a front vertical plate, a rear vertical plate and a bottom plate connected between the front vertical plate and the rear vertical plate;

the large positioning groove is positioned at the upper part of the front vertical plate; the front part of the bottom plate is provided with an assembly hole group matched with the first pressing assembly, each assembly hole group comprises three threaded holes, and the three threaded holes are an assembly hole I matched with the adjusting screw rod, an assembly hole II matched with the locking screw rod I and an assembly hole III matched with the supporting screw rod I respectively; the rear part of the bottom plate is provided with a mounting hole matched with the auxiliary movable supporting piece;

the number of the first pressing assemblies is two, and two groups of assembling hole groups are symmetrically arranged on the left and right of the front part of the bottom plate.

The large positioning groove and the small positioning groove are both V-shaped; the big constant head tank department goes up the symmetry and is equipped with left locating piece, right locating piece, and left locating piece, right locating piece all include with big constant head tank wall laminated location portion, kink and preceding riser are laminated mutually, on the riser before the kink is fixed in through bolt one.

The counterweight component comprises a counterweight block and a counterweight bolt; the balancing weight is a cylindrical truncated body, and the cylindrical truncated body of the balancing weight is formed by rectangular truncation parallel to the axis of the cylinder; the transition disc is provided with a plurality of adjusting holes for adjusting the positions of the balancing weights, and the tail ends of the balancing weights are arranged at the adjusting holes; a positioning block which is propped against the back surface of the flange plate is arranged above the balancing weight.

The counterweight assembly and the main supporting piece are arranged oppositely, and the counterweight block is arranged to ensure that the complex welding piece can be processed more safely and conveniently.

The pressing assembly II comprises a pressing plate II corresponding to the top of the auxiliary cylindrical section, a locking screw rod II matched with the pressing plate II, a supporting screw rod II corresponding to the bottom of the auxiliary cylindrical section and a supporting screw rod III, and the locking screw rod II, the supporting screw rod II and the supporting screw rod III are all arranged on the transition disc.

The back of the transition disc is provided with a connecting disc for connecting a lathe, and positioning pins are arranged on the transition disc and the connecting disc; the middle part of the connecting disc is provided with an interface butted with a lathe, and the periphery of the interface of the connecting disc is provided with a circle of connecting bolt connected with a main shaft of the lathe.

The difficulty in machining complex welding parts on a lathe is how to clamp the workpiece on the lathe. The invention takes the unmachined excircle of the workpiece as a positioning reference, adopts V-shaped surface positioning, and adopts two reinforced triangular ribs and an inclined cylinder at two positions of the workpiece as clamping points. The main supporting piece is a U-shaped structure formed by a front vertical plate, a rear vertical plate and a bottom plate connected between the front vertical plate and the rear vertical plate. The front end of the main supporting piece is of a V-shaped structure and used for positioning the excircle of the workpiece, and the excircle center of the workpiece is positioned on the rotation center of the machine tool; the middle part is a concave plane, two sides close to the front end are respectively provided with 3 threaded holes, and a screw rod is arranged in each threaded hole and used for clamping a workpiece; the center line of the bottom plate of the main supporting piece is provided with a threaded hole, an auxiliary movable supporting piece is installed on the threaded hole, the main supporting piece and the auxiliary movable supporting piece support a main cylindrical section of the complex welding piece, and the auxiliary cylindrical section compresses the complex welding piece through the second compressing assembly, so that the complex welding piece is prevented from moving in the rotary machining process. The complex welding parts can be quickly aligned through the matching among the components of the vehicle tool disclosed by the invention: firstly, the spherical movable joint of the auxiliary movable supporting piece can adjust, align and support a main cylindrical section of a complex welding piece; secondly, the flange plate is positioned at three positions through a left positioning block, a right positioning block and a positioning block; thirdly, the positions of the reinforcing ribs are adjusted one by one through an adjusting screw rod, a locking screw rod I and a supporting screw rod; and adjusting the positions of the second support screw rod, the third support screw rod and the bottom surface of the auxiliary cylindrical section to align the workpiece.

By designing the vehicle tool, the problem of low machining efficiency of the workpiece is effectively solved, the lathe is high in rotating speed, the forming surface roughness is good, the machining quality is effectively guaranteed, the workpiece is adjusted for the first time during machining, and after the position of the tool is aligned, subsequent adjustment is not needed, so that the clamping efficiency is improved, the output speed of the workpiece is greatly guaranteed, the production rhythm is guaranteed, and the problem of narrow production openings is solved.

Drawings

FIG. 1 is a schematic structural view of a complex weldment;

FIG. 2 is one of the perspective views of the present invention;

FIG. 3 is a second perspective view of the present invention;

FIG. 4 is a state diagram of the use of the present invention;

FIG. 5 is a left side view of FIG. 4;

FIG. 6 is a top view of FIG. 4 (de-weighting);

FIG. 7 is a three-dimensional view of the present invention in use;

FIG. 8 is a schematic view of the main support;

FIG. 9 is a left side view of FIG. 8;

FIG. 10 is a top view of FIG. 8;

fig. 11 is a schematic structural view of an auxiliary movable support.

Detailed Description

In fig. 1, a complex weldment (workpiece for short) 2 comprises a main cylindrical section, a transition cylindrical section 208 and an auxiliary cylindrical section 205; the main cylindrical section is of a stepped structure and comprises a thick cylindrical section 201 located at the front end and a thin cylindrical section 202 located at the rear end, a circle of flange plate 204 is arranged on the excircle of the rear end of the thick cylindrical section 201, a circle of reinforcing rib 203 is arranged between the flange plate 204 and the excircle of the thin cylindrical section 202, the lower end of the main cylindrical section is connected with an auxiliary cylindrical section 205, the axis of the main cylindrical section coincides with the axis of the transition disc 3, the included angle between the axis of the main cylindrical section and the axis of the auxiliary cylindrical section 205 is a, the included angle between the axis of the transition cylindrical section 208 and the axis of the auxiliary cylindrical section is a1, and the complex welding part 2 further comprises a fastening block 206 and a fixing block 207.

In fig. 2 and 3, the main support 1 corresponds to the flange 204 of the complex welding part, the auxiliary movable support 5 corresponds to the thin cylindrical section 202 of the complex welding part, the main support 1 has a large positioning slot 101 adapted to the flange 204, and the auxiliary movable support 5 has a small positioning slot 505 corresponding to the thin cylindrical section 202. The first compression assembly 90 comprises a first locking screw rod 7, a first pressure plate 9, a first support screw rod 8 positioned below the head of the first pressure plate 9 and an adjusting screw rod 6 positioned below the tail of the first pressure plate 9, the first pressure plate 9 is arranged at the upper end of the first locking screw rod 7 through a locking nut 18, and the first locking screw rod 7 is positioned between the first support screw rod 8 and the adjusting screw rod 6; when the first pressing assembly 90 works, the upper end of the first supporting screw rod 8 abuts against the lower surface of the reinforcing rib 203 of the workpiece, the head of the first pressing plate 9 presses the upper surface of the reinforcing rib 203 of the workpiece, and the upper end of the adjusting screw rod 6 abuts against the tail of the first pressing plate 9. The second pressing component 130 comprises a second pressing plate 13 corresponding to the top of the auxiliary cylindrical section, a second locking screw 11 matched with the second pressing plate 13, a second supporting screw 10 corresponding to the bottom of the auxiliary cylindrical section and a third supporting screw 12, and the second locking screw 11, the second supporting screw 10 and the third supporting screw 12 are all arranged on the transition disc 3. The counterweight component comprises a counterweight block 16 and a counterweight bolt 23; the balancing weight 16 is a cylindrical truncated body, and the cylindrical truncated body of the balancing weight 16 is formed by rectangular truncation parallel to the axis of the cylinder; the transition disc 3 is provided with a plurality of adjusting holes for adjusting the position of the balancing weight 16, and the tail end of the balancing weight bolt 23 is arranged at the adjusting holes; a positioning block 141 which is abutted against the back surface of the flange 204 is arranged above the balancing weight 16. The large positioning groove 101 and the small positioning groove 505 are both V-shaped; the large positioning groove 101 is symmetrically provided with a left positioning block 14 and a right positioning block 15, the left positioning block 14 and the right positioning block 15 both comprise a positioning part and a bending part which are attached to the groove wall of the large positioning groove 101, the bending part is attached to the front vertical plate 104, and the bending part is fixed on the front vertical plate 104 through a first bolt 20.

As shown in fig. 4-7, when the connecting disc 4 is machined, the taper hole on the connecting disc is matched with the machine tool spindle for machining, so that the assembly precision of the connecting disc 4 and the machine tool spindle is ensured. Firstly, connecting and fastening a main support piece 1 and a transition disc 3 by using a bolt III 22 arranged in a bolt hole III 220, preparing two positioning pin holes on a component after the connection is finished, and positioning by using a positioning pin 24 to ensure the positioning precision of the component; secondly, connecting and fastening the assembly and the connecting disc 4 by using a second bolt 21, preparing two positioning pin holes in the transition disc 3 and the connecting disc 4, and positioning by using a positioning pin 24; then the balancing weight 16 is arranged on the transition disc 3 and is connected and fastened by a balancing weight bolt 23, the transition disc 3 is provided with a series of holes, the balancing weight 16 can be arranged according to actual conditions, and the stable rotation is ensured; and finally, the components are connected with a machine tool spindle interface 25 through a connecting screw rod 17 and are fastened through a gasket and a nut 27, so that the phenomenon that the vehicle tool does not displace and risk during rotating and machining is avoided.

After the main body framework is installed and installed on the main shaft of the machine tool, firstly, an auxiliary movable support piece 5 is installed at the installation hole 51, as shown in fig. 4, the auxiliary movable support piece 5 is a movable structure which can be adjusted, the upper part of the auxiliary movable support piece is V-shaped, the square 508 at the lower end of the screw rod is adjusted by a wrench, and the whole structure can be adjusted to a proper position by a spherical movable joint; secondly, a left positioning block 14 and a right positioning block 15 are installed and are connected and fastened through a first bolt 20; assembling an adjusting screw 6, a locking screw I7, a supporting screw I8, a supporting screw II 10, a locking screw II 11 and a supporting screw III 12 in sequence according to the drawing requirements; finally, the workpiece 2 with the marked line is installed, after the position of the workpiece 2 is adjusted, the adjusting screw 6, the first supporting screw 8, the second supporting screw 10 and the third supporting screw 12 are adjusted by a wrench to be tightly attached to the workpiece 2, and then the workpiece 2 is tightly pressed and fixed by the first pressing plate 9, the second pressing plate 13, the washer and the locking nut 18, so that the workpiece 2 is guaranteed to be fastened and fixed.

After all the assemblies are completed, the table is drawn on the machine tool to align the marking position of the workpiece 2, the difference between the marking position and the marking position is not more than 0.5mm, the adjustment is performed for many times, the V-shaped surface of the body 1 and the sizes of the left positioning block 14 and the right positioning block 15 can be trimmed, the counterweight block 16 can adjust the positions of the counterweight bolt 23 and the adjusting hole according to the actual rotation condition of the tool, and the rotation center of the workpiece 2 is ensured to be consistent with the center of the main shaft of the machine tool and to run stably. After the adjustment, the adjustment is not needed subsequently, the workpieces with the serial number 2 are installed and fastened, the machining can be carried out, the machining efficiency is greatly improved, and the machining quality is also guaranteed.

In fig. 8, 9 and 10, the main support 1 is composed of a front vertical plate 104, a rear vertical plate 103, and a bottom plate 105 connected between the front and rear vertical plates. The large positioning groove 101 is positioned at the upper part of the front vertical plate 104; the front part of the bottom plate 105 is provided with an assembly hole group matched with the first pressing assembly 90, each assembly hole group comprises three threaded holes, and the three threaded holes are respectively an assembly hole I106 matched with the adjusting screw 6, an assembly hole II 107 matched with the locking screw I7 and an assembly hole III 108 matched with the supporting screw I8. Two positioning pin holes I102 are arranged on the rear vertical plate 103, and the main supporting piece 1 is positioned with the transition disc 3 through a positioning pin I arranged at the positioning pin holes I102.

In fig. 11, the auxiliary movable supporting member 5 includes a positioning plate group and a screw 503, the end of the screw 503 has a spherical movable joint, the upper surface of the positioning plate group is a small positioning groove 505, the lower portion of the positioning plate group is provided with an adjusting ring-shaped groove adapted to the spherical movable joint, and the spherical movable joint is in clearance fit with the adjusting ring-shaped groove. The V-shaped gap between the ball head and the annular groove can swing within 1-3 degrees through the ball head joint. The locating plate group comprises a locating plate 501 and a fixing plate 502, the locating plate 501 is connected with the fixing plate 502 through a bolt 504, the locating plate is connected tightly, a hemispherical groove is arranged on the locating plate 501, a notch hole corresponding to the hemispherical groove is formed in the fixing plate 502, the notch hole comprises a spherical neck hole and a cylindrical hole connected with the spherical neck hole, and a complete adjusting annular groove is formed after the hemispherical groove is in butt joint with the notch hole. The spherical movable joint is an 3/4 ball and comprises a hemispherical part 506 positioned at the upper part and a spherical neck part connected to the lower part of the hemispherical part 506, the hemispherical part 506 is matched with a hemispherical groove, the spherical neck part is matched with a spherical neck hole, and a cylindrical hole is matched with a screw part 507 at the lower part of the spherical neck part. The lower end of the screw 503 is a square 508.