Efficient welding tool for suspension pipe supporting block

Abstract

The utility model discloses an efficient welding tool for a supporting block of a suspension pipe, which realizes quick installation and positioning between the supporting block in the suspension pipe and a central pipe through a first tool. And through reciprocating operation, the assembly operation between a large number of suspension pipe parts can be rapidly achieved, and the assembly efficiency of the suspension pipe parts is remarkably improved. And through the second tool, the welding efficiency between the supporting block in the suspension pipe and the central pipe is improved. After single-layer single-pass welding of the front face of the suspension pipe is completed, through the transmission device in the mechanism, position transmission and 180-degree turning over of the suspension pipe can be rapidly achieved, the suspension pipe is conveyed back to a welding station again, double-layer two-pass welding operation of the back face of the suspension pipe is achieved, and then position transmission and 180-degree turning over of the suspension pipe can be rapidly achieved through the transmission device in the mechanism again. And the suspension pipe is conveyed back to the welding station again, single-layer second welding operation on the front face of the suspension pipe is achieved, and all welding operation on the single suspension pipe is completed.

Description

Technical Field

[0001] The utility model relates to a high-efficiency welding tool for a suspension pipe support block. Background Art

[0002] The suspension pipe is a boiler component product in a conventional thermal power boiler. The utility model discloses a suspension pipe (see Figure 1 to Figure 3 ), wherein the product suspension pipe is welded by a central pipe 30 and a support block 31. The outer diameter of the central pipe 30 of the suspension pipe is set to: Ф1, and the size range of Ф1 is: 30~90mm.

[0003] The support blocks 31 are installed on both sides of the central tube 30 and are arranged symmetrically on the left and right. Figure 1 to Figure 3 The angle between the upper part of the single support block 31 and the central tube 30 is set to a, and the angle between the lower part of the single support block 31 and the central tube 30 is set to b. The angle a is greater than the angle b, and the angle range of a and b is set to: 45-85°

[0004] The thickness of the support block 31 is set to S1, wherein the size range of S1 is 5-10 mm. Two rows of symmetrically arranged support blocks 31 are provided on both sides of the central tube 30, wherein the pitch between the support blocks 31 is set to L1, wherein the size range of L1 is 50-200 mm.

[0005] For the above-mentioned suspension pipe products, the workshop manufacturing process plan is to first install the center pipe and the support block on the welding equipment according to the dimensions marked in the design drawings (the welding equipment is provided with a fixed center pipe and the support block is embedded in the tooling). After passing the manual inspection, the single-pass welding on the front side of the suspension pipe is completed through the welding equipment (the front side of the suspension pipe, the first side base welding), and then the clamping tooling on the welding equipment is loosened, the suspension pipe is manually turned 180 degrees, and the suspension pipe is re-clamped and fixed by the tooling to complete the two-pass welding on the back side of the suspension pipe (the back side of the suspension pipe, the second side base welding and the cladding layer welding), and then the clamping tooling on the welding equipment is loosened again, the suspension pipe is manually turned 180 degrees, and the suspension pipe is re-clamped and fixed by the tooling to complete the second pass welding on the front side of the suspension pipe (the front side of the suspension pipe, the first side cladding layer welding).

[0006] The above-mentioned solution for welding the suspension pipe has low production efficiency, and welding defects such as weld nodules and pores are easily generated during the welding process, and the pass rate of the fillet welds is difficult to guarantee. Utility Model Content

[0007] The utility model provides a high-efficiency welding tool for a suspension pipe support block, and its technical solution is:

[0008] A suspension pipe support block efficient welding tool, comprising a first tool, wherein the suspension pipe is welded together by a central pipe and a support block, and the first tool comprises: a base, a support, a positioning plate, a screw, a pressure rod, a pressure rod support, a pin shaft, and a split pin;

[0009] Several supports are installed at both ends and the middle of the base. There are arc grooves on the supports, which have the same outer diameter as the center tube in the suspension tube. The arc grooves are used to position the center tube.

[0010] The positioning plate is installed on the base and is fixed by screws; the positioning plate is provided with a notch that matches the shape of the support block, wherein the notch depth is S1, which is the same as the thickness S1 of the support block. The thickness of the positioning plate 3 is set to S, that is, the thickness of the bottom of the positioning plate notch S2 = S-S1;

[0011] The positioning plates are installed on both sides of the central tube and arranged symmetrically on the left and right, wherein the angle between the outer side of the positioning plate away from the notch and the central tube is set to a; the angle between the inner side of the positioning plate on the same side as the notch and the central tube is set to b; the angles a and b in the positioning plates are the same as the angles a and b in the product support block, so that the support block can be embedded and fixed between the two positioning plates;

[0012] The pressure rod support is installed on the base, and the pressure rod is connected to the pressure rod support through a pin shaft and a cotter pin. The pressure rod can rotate around the pin shaft relative to the pressure rod support;

[0013] The center pipe is placed on the support, the support block is inserted between the positioning plates, the pressure rods on both sides are closed so that the pressure rods press the support block, and then the pressure rods on both sides are opened so that the pressure rods release the support block.

[0014] Preferably, in a high-efficiency welding tooling for a suspension pipe support block, the positioning plate is fixedly mounted on the base by screwing;

[0015] The depth of the notch on the positioning plate is S1, which is the same as the thickness S1 of the support block. The thickness of the positioning plate is set to S, that is, the thickness of the bottom of the notch of the positioning plate S2 = S-S1;

[0016] The angle between the outer side of the positioning plate away from the notch and the central tube is set to a; the angle between the inner side of the positioning plate on the same side as the notch and the central tube is set to b; the angles a and b in the positioning plate are the same as the angles a and b in the product support block, so that the support block can be embedded and fixed between the two positioning plates;

[0017] The pressure rod (5) is connected to the pressure rod support via a pin shaft (7) and a cotter pin (8), and the pressure rod can rotate around the pin shaft relative to the pressure rod support.

[0018] Preferably, a suspension pipe support block efficient welding tooling further comprises a second tooling, wherein the suspension pipe is welded by a central pipe and a support block, and the second tooling comprises: a platform, a needle bearing, a belt, an upper part of a motor, a lower part of a motor, a chain, a rotating wheel, a connecting rod, and a lifting plate;

[0019] The lower part of the motor is installed at one end of the platform and is located at the bottom. The lower part of the motor can realize the clockwise / counterclockwise rotation of the wheel through the chain. There is a wheel at each end of the lower part of the motor. The lower part of the motor can synchronously drive the two wheels to rotate in the same direction and at the same speed through the chain. One end of the connecting rod is connected to the wheel, and the other end is connected to one end of the lifting plate. The two wheels are transmitted through the connecting rod to drive the lifting plate to produce an elliptical motion trajectory.

[0020] The upper part of the motor is installed at one end of the platform and is located at the top. The upper part of the motor realizes the clockwise / counterclockwise rotation of the needle bearing through the belt, so that the suspension pipe product produces clockwise / counterclockwise rotation;

[0021] The second tooling can realize the function of 180-degree rotation and turning of the suspension pipe.

[0022] An efficient welding process method for a suspension pipe support block, the operation steps are as follows:

[0023] Step 1:

[0024] The first tool is used to realize the installation and positioning between the support block in the suspension pipe and the central pipe;

[0025] 1. According to the specifications and sizes of the support block and the central tube in the suspension tube, select the corresponding supports and positioning plates to complete the first tooling assembly operation;

[0026] 2. The suspension pipe is first placed on the parts assembly platform, and the support blocks are installed on both sides of the suspension pipe. After all the support blocks are installed, the support blocks are compacted by closing the pressure rods to achieve rapid assembly operation between the center pipe of the suspension pipe and the support blocks;

[0027] 3. The connection between the suspension pipe and the support block is fixed by spot welding;

[0028] 4. By opening the pressure rod, the suspension tube and the support block assembly can be quickly separated from the parts assembly platform, and the suspension tube is manually turned 180 degrees, and the back is spot welded and fixed according to the above requirements;

[0029] 5. Clean and remove rust from the surface of the welding area between the suspension pipe and the support block;

[0030] 6. Repeating the above operations can quickly complete the installation and positioning of multiple suspension pipe parts, realize the batch assembly of suspension pipes, and significantly improve the product assembly efficiency;

[0031] Step 2:

[0032] The second tool is used to improve the welding efficiency between the support block and the center pipe in the suspension pipe;

[0033] 1. Set the current and voltage through the welding mechanism, perform root welding, the current is 130-180A, the welding speed is 5-8mm / s, and the machine head and welding track are completed;

[0034] 2. The suspension pipe is at point A, and the single-layer single-pass welding operation on the front side of the suspension pipe is completed (the front side of the suspension pipe, the first layer of single-pass base welding) operation is completed.

[0035] 3. The controller controls the motor at the bottom of the platform, and the chain, wheel, connecting rod and lifting plate are used to transmit the motion. That is, when the wheel rotates one circle, the lifting plate can lift the suspension pipe at point A to point B through the connecting rod;

[0036] 4. The controller controls the upper motor of the platform, and the belt and needle bearing are used to transmit the rotational motion. The needle bearing drives the suspension tube to rotate, so that the suspension tube at point B can turn over 180 degrees.

[0037] 5. The controller is used to control the motor at the bottom of the platform, and the motion is transmitted through the chain, wheel, connecting rod, and lifting plate, so that the lifting plate can lift the suspension pipe at point B and transfer it back to point A;

[0038] 6. Set the current and voltage through the welding mechanism, perform base welding, adjust to cover welding, the current is 160-220A, the welding speed is 5-10mm / s, and check the machine head and weld track;

[0039] 7. At point A, complete the double-layer two-pass welding on the back of the suspension pipe, that is, the first layer of single-pass bottom welding and the second layer of cover welding on the back of the suspension pipe;

[0040] 8. Repeat the operations of sequence 3 to sequence 6 in step 2 to complete the second single-layer welding of the front side of the suspension pipe, that is, the second layer of cover welding of the front side of the suspension pipe;

[0041] 9. After completing all the operation sequences in step 2, the accessory welding operation in a single suspension pipe can be realized. Similarly, repeat all the operation sequences in step 2 to complete the accessory welding operation in the suspension pipes one by one.

[0042] Beneficial effects:

[0043] The first tooling is used to realize the rapid installation and positioning between the support block and the central tube in the suspension tube. The reciprocating operation can quickly realize the assembly operation between the suspension tube parts in large quantities, and significantly improve the assembly efficiency of the suspension tube parts.

[0044] The second tooling improves the welding efficiency between the support block and the center tube in the suspension tube. After the single-layer single-pass welding on the front side of the suspension tube is completed, the transmission device in the mechanism can quickly realize the position transmission of the suspension tube and turn it over 180 degrees, and the suspension tube is transferred back to the welding station to realize the double-layer two-pass welding operation on the back side of the suspension tube. The transmission device in the mechanism can quickly realize the position transmission of the suspension tube and turn it over 180 degrees, and the suspension tube is transferred back to the welding station to realize the single-layer second-pass welding operation on the front side of the suspension tube, completing all welding operations of a single suspension tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 : A main view of a suspension pipe product;

[0046] Figure 2 : A top view of a suspension pipe product;

[0047] Figure 3 :A suspension pipe product, Figure 1 Enlarged image at the center X;

[0048] Figure 4 : Main view of the first tooling;

[0049] Figure 5 : Top view of the first tooling;

[0050] Figure 6 : Enlarged view of the end position of the first tooling;

[0051] Figure 6 A: Schematic diagram of the appearance of the positioning plate 3;

[0052] Figure 7 :for Figure 5 , Figure 6 AA section view;

[0053] Figure 8 : The first tooling pressure bar is in the open state;

[0054] Fig. 9 : The first tooling pressure rod is in the closed state;

[0055] Fig.10 : Main view of the second tooling;

[0056] Fig.11 : Top view of the second tooling;

[0057] Fig.12 : Enlarged view of the end position of the second tooling;

[0058] Fig.13 : Illustration of the suspension pipe being placed on the second tooling;

[0059] Fig.14A: The position diagram of the suspension pipe at the second tooling A;

[0060] Fig. 14B : Illustration of the position of the suspension pipe at the second tooling B;

[0061] Fig.15 : Schematic diagram of the suspension tube moving on the needle bearing in the second fixture 1;

[0062] Fig.16 : Schematic diagram of the suspension tube moving on the needle bearing in the second fixture 2;

[0063] Fig.17 : Schematic diagram of the suspension tube moving on the needle bearing in the second fixture 3;

[0064] Fig.18A : The state diagram of the suspension pipe at point B of the second tooling;

[0065] Fig.18B : Schematic diagram of the status of the suspension pipe at point A of the second tooling.

[0066] Summary of reference numerals in the accompanying drawings: base 1, support 2, positioning plate 3, screw 4, pressure rod 5, pressure rod support 6, pin 7, cotter pin 8; platform 9, needle bearing 10, belt 11, upper part of motor 12, lower part of motor 13, chain 14, rotating wheel 15, connecting rod 16, lifting plate 17; center tube 30, support block 31, welding mechanism 32. DETAILED DESCRIPTION

[0067] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0068] Embodiments of the present utility model:

[0069] In order to overcome the above situation, the utility model provides a suspension pipe support block efficient welding process method and two toolings thereof. During the implementation process, two devices (mechanisms) are used to achieve the above purpose.

[0070] like Figure 4-9 As shown, a high-efficiency welding tool for a suspension pipe support block includes a first tool, which is used to realize the installation and positioning mechanism between the support block and the central pipe in the suspension pipe. Figure 1-3 As shown, the product suspension pipe is welded together by a central pipe 30 and a support block 31. Figure 3 As shown, the dimensions of the angles a and b in the product support block 31 are shown.

[0071] like Figure 6 As shown, the tooling includes: a base 1, a support 2, a positioning plate 3, a screw 4, a pressure rod 5, a pressure rod support 6, a pin shaft 7, and a cotter pin 8.

[0072] like Figure 4-9 As shown, the support 2 is used to position the central tube 30. The support 2 is installed at both ends and the middle position of the base 1. There is an arc groove on the support 2, and its size is Φ1, which is the same as the outer diameter size Φ1 of the central tube 30 in the suspension tube. Therefore, the arc groove is used to position the central tube 30.

[0073] like Figure 4 As shown, the positioning plate 3 is mounted on the base 1 and is tightened by screws 4. The positioning plate 3 is provided with a notch that matches the shape of the support block 31, wherein the notch depth is S1, which is the same as the thickness S1 of the support block. The thickness of the positioning plate 3 is set to S, that is, the thickness of the bottom of the positioning plate notch S2 = S-S1.

[0074] like Figure 6 and 6 As shown in A, the positioning plate 3 and the support block in the suspension pipe are installed in a similar manner. The positioning plate 3 is installed on both sides of the central pipe and arranged symmetrically on the left and right. The angle between the outer side of the positioning plate 3 away from the notch and the central pipe is set to a; the angle between the inner side of the positioning plate 3 on the same side as the notch and the central pipe is set to b. The angles a and b in the positioning plate 3 are the same as the angles a and b in the product support block, so that the support block 31 can be embedded and fixed between the two positioning plates 3.

[0075] The pressure rod support 6 is installed on the base 1, and the pressure rod 5 is connected to the pressure rod support 6 through the pin shaft 7, 8 cotter pin 8. The pressure rod 5 can realize a fixed axis rotation action relative to the pressure rod support 6 around the pin shaft 7.

[0076] The central tube 30 is placed on the support 2, the support block 31 is inserted between the positioning plates 3, the pressure rods 5 on both sides are closed, so that the pressure rods 5 press the support block 31, and the support block and the central tube are manually spot welded by argon arc welding. Then, the pressure rods 5 on both sides are opened, so that the pressure rods 5 release the support block 31, and the suspension tube can be quickly taken out from the first tooling.

[0077] like Figures 10 to 18B As shown, the second tooling is used to improve the welding efficiency between the support block and the central tube in the suspension tube. The second tooling comprises: a platform 9, a needle bearing 10, a belt 11, an upper motor 12, a lower motor 13, a chain 14, a rotating wheel 15, a connecting rod 16, and a lifting plate 17. The product suspension tube is welded by the central tube 30 and the support block 31, and the welding mechanism is set as 32.

[0078] The lower part 13 of the motor is installed at one end of the platform 9 and is located at the bottom position. The lower part 13 of the motor can realize the clockwise / counterclockwise rotation of the wheel 15 through the chain 14 (in this embodiment, a wheel 15 is provided at each end of the lower part 13 of the motor, and the lower part 13 of the motor can synchronously drive the two wheels 15 to rotate in the same direction and at the same rotation speed through the chain 14). One end of the connecting rod 16 is connected to the wheel 15, and the other end is connected to one end of the lifting plate 17. In this embodiment, the two wheels 15 are transmitted through the connecting rod 16 to drive the lifting plate 17 (1 piece) to produce an elliptical motion trajectory.

[0079] That is, when the suspension pipe is located at position A, the lower part 13 of the motor generates clockwise rotation, which can drive the two wheels 15 to also generate clockwise rotation, so that the lifting plate 17 generates an elliptical motion trajectory, that is, the suspension pipe at position A can be lifted and transported to position B through the lifting plate 17.

[0080] That is, when the suspension pipe is at position B, the lower part 13 of the motor generates counterclockwise rotation, which can drive the two wheels 15 to also generate counterclockwise rotation, so that the lifting plate 17 generates an elliptical motion trajectory, that is, the suspension pipe at position B can be lifted and transported to position A through the lifting plate 17.

[0081] The upper part 12 of the motor is installed at one end of the platform 9 and is located at the top position. The upper part 12 of the motor realizes the clockwise / counterclockwise rotation of the needle bearing 10 through the belt 11, so that the suspension pipe product at the B position produces a clockwise / counterclockwise rotation (rotates 180 degrees), further achieving the purpose of the suspension pipe product producing a 180-degree rotation and turning over.

[0082] An efficient welding process method for a suspension pipe support block, the operation steps are as follows:

[0083] Step 1 (see Figures 1 to 9 ):

[0084] The first tooling is used to realize the installation and positioning between the support block in the suspension pipe and the central pipe.

[0085] 1. According to the specifications and sizes of the support block and the center pipe in the suspension pipe, select the corresponding supports and positioning plates to complete the first tooling assembly operation.

[0086] 2. The suspension tube is first placed on the parts assembly platform, and support blocks are installed on both sides of the suspension tube. After all the support blocks are installed, the product (support block) is compacted by closing (rotating) the pressure rod to achieve rapid assembly operation between the center tube of the suspension tube and the support block.

[0087] 3. The connection between the suspension pipe and the support block is fixed by spot welding (the spot welding operation is completed manually).

[0088] 4. By opening (rotating) the pressure rod, the suspension tube and the support block assembly can be quickly separated from the parts assembly platform. The suspension tube is manually turned 180 degrees, and the back is spot welded and fixed according to the above requirements.

[0089] 5. Clean and remove rust from the surface of the welding area between the suspension pipe and the support block.

[0090] 6. Repeating the above operations can quickly complete the installation and positioning of multiple suspension pipe parts, realize the batch assembly of suspension pipes, and significantly improve the product assembly efficiency.

[0091] Step 2 (see Figure 10 to Figure 1 8):

[0092] The second tool is used to improve the welding efficiency between the support block and the center pipe in the suspension pipe.

[0093] 1. Set the current and voltage (base welding) (parameters such as 130-180A and welding speed 5-8mm / s) through the welding mechanism 32 to complete the machine head and weld track.

[0094] 2. The suspension pipe is at point A, and the single-layer single-pass welding operation on the front side of the suspension pipe is completed (the front side of the suspension pipe, the first layer of single-pass base welding) operation is completed.

[0095] 3. Through the controller, the motor at the bottom of the control platform (set to rotate clockwise) is controlled, and the motion is transmitted through the chain, wheel, connecting rod, and lifting plate. That is, when the wheel rotates one circle clockwise, the lifting plate can lift the suspension pipe at point A to point B through the connecting rod.

[0096] 4. Through the controller, the upper motor of the control platform is controlled, and the rotational motion is transmitted through the belt and needle bearing. The needle bearing drives the suspension tube to rotate, so that the suspension tube at point B can turn over 180 degrees.

[0097] 5. Through the controller, the motor at the bottom of the control platform is controlled (set to rotate counterclockwise), and the motion is transmitted through the chain, wheel, connecting rod, and lifting plate, so that the lifting plate can lift the suspension pipe at point B and transfer it back to point A.

[0098] 6. Set the current and voltage (base welding, cover welding) (parameters such as 160-220A, welding speed 5-10mm / s, etc.) through the welding mechanism, and check the machine head and weld trajectory.

[0099] 7. At point A, complete the double-layer two-pass welding on the back of the suspension pipe (on the back of the suspension pipe, the first layer is single-pass base welding, and the second layer is cover welding).

[0100] 8. Repeat operations 3 to 6 in step 2 to complete the second single-layer welding of the front side of the suspension pipe (front side of the suspension pipe, second layer cover welding).

[0101] 9. After completing all the operation sequences in step 2, the accessory welding operation in a single suspension pipe can be realized. Similarly, repeat all the operation sequences in step 2 to complete the accessory welding operation in the suspension pipes one by one, avoiding frequent manual loading, unloading, turning, and re-clamping of the suspension pipe products on the welding equipment, and significantly improving product production efficiency.

[0102] By analogy, the two devices and product installation and welding steps (step 1 and step 2) disclosed in the utility model can quickly complete the suspension pipe welding operation, avoid frequent manual loading and unloading, flipping, and re-clamping of suspension pipe products on welding equipment, significantly improve product manufacturing efficiency, and reduce product manufacturing costs.

[0103] Although the present invention is disclosed as above with preferred examples, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be based on the definition of the claims.

Claims

1. A high-efficiency welding tool for a suspension pipe support block, comprising a first tool, wherein the suspension pipe is composed of a central pipe (30) and a support block (31) It is welded together, and is characterized in that: The first tooling comprises: a base (1), a support (2), a positioning plate (3), a screw (4), a pressure rod (5), a pressure rod support (6), a pin shaft (7), and a cotter pin (8); Several supports are installed at both ends and the middle of the base. There are arc grooves on the supports, which have the same outer diameter as the center tube in the suspension tube. The arc grooves are used to position the center tube. The positioning plate is installed on the base; the positioning plate is provided with a notch matching the shape of the support block; The positioning plates (3) are installed at both sides of the central tube and arranged symmetrically on the left and right sides; The pressure rod support (6) is installed on the base; The center tube is placed on the support (2), the support block is inserted between the positioning plates, the pressure rods (5) on both sides are closed so that the pressure rods press the support block, and then the pressure rods on both sides are opened so that the pressure rods release the support block.

2. The high-efficiency welding tool for suspension pipe support block according to claim 1 is characterized in that: The positioning plate is fixed on the base by screwing; The depth of the notch on the positioning plate is S1, which is the same as the thickness S1 of the support block. The thickness of the positioning plate is set to S, that is, the thickness of the bottom of the notch of the positioning plate S2 = S-S1; The angle between the outer side of the positioning plate away from the notch and the central tube is set to a; the angle between the inner side of the positioning plate on the same side as the notch and the central tube is set to b; the angles a and b in the positioning plate are the same as the angles a and b in the product support block, so that the support block can be embedded and fixed between the two positioning plates; The pressure rod (5) is connected to the pressure rod support via a pin shaft (7) and a cotter pin (8), and the pressure rod can rotate around the pin shaft relative to the pressure rod support.

3. The high-efficiency welding tool for suspension pipe support block according to claim 2 is characterized in that: The device also includes a second tooling, wherein the suspension tube is welded together by a central tube (30) and a support block (31), and the second tooling includes: a platform (9), a needle bearing (10), a belt (11), an upper motor part (12), a lower motor part (13), a chain (14), a rotating wheel (15), a connecting rod (16), and a lifting plate (17); The lower part of the motor (13) is installed at one end of the platform (9) and is located at the bottom. The lower part of the motor can realize the clockwise / counterclockwise rotation of the wheel (15) through the chain (14). A wheel is provided at each end of the lower part of the motor. The lower part of the motor can realize synchronous driving of the two wheels to rotate in the same direction and at the same speed through the chain. One end of the connecting rod (16) is connected to the wheel, and the other end is connected to one end of the lifting plate (17). The two wheels are transmitted through the connecting rod, and the lifting plate is driven to generate an elliptical motion trajectory respectively. The upper part of the motor (12) is installed at one end of the platform (9) and is located at the top. The upper part of the motor realizes the clockwise / counterclockwise rotation of the needle bearing (10) through the belt (11), so that the suspension pipe product generates a clockwise / counterclockwise rotation. The second tooling can realize the function of 180-degree rotation and turning of the suspension pipe.

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