Axial float adjusting system for cylindrical welding part on welding roller carrier
Technical Field
The utility model belongs to the technical field of the welding technique and specifically relates to a cylindrical welding piece axial float adjustment system on welding gyro wheel frame is related to.
Background
The welding roller frame is provided with four rollers for supporting a cylindrical weldment, the central axes of the four rollers are on the same plane and are parallel to each other theoretically, the distance between the two rollers at one end of the weldment is equal to the distance between the two rollers at the other end of the weldment, and the axis of each roller is parallel to the central line of the weldment. However, due to manufacturing and installation accuracy and other reasons, the roller axis and the central axis of the weldment are not parallel to form a helical angle, so that the weldment moves axially.
The conventional welding roller frame for preventing axial movement mainly comprises a driving roller (for driving a weldment to rotate), a driven roller frame (for adjusting the axial movement direction of the weldment), a weldment axial movement detection device and a control system. The axial movement detection device of the weldment mainly props against the end face of the weldment through a spring force by a sensor so as to move along with the axial movement of the weldment. According to the magnitude and direction of the axial movement displacement and speed, the axial movement displacement and speed are fed back to the control system, and the anti-movement mechanical actuating mechanism acts to achieve the anti-movement purpose. The anti-channeling mechanical actuating mechanism comprises three types, namely a deflection type actuating mechanism, a jacking type actuating mechanism and a translation type actuating mechanism, wherein the translation type actuating mechanism is commonly used, a driven roller horizontally moves along the central axis of a weldment in a direction perpendicular to the central axis of the weldment, the axial movement direction of the weldment is adjusted, and the anti-channeling function is realized.
But the welding roller frame for preventing axial movement at present has the following problems: the detection mode commonly used at present is the detection of the end face of a cylindrical weldment, and the mode is inevitably influenced by the unevenness of the end face of the weldment in the vertical direction of the end face and the axial lead of the weldment, so that the requirement on the end face precision is high; at present, a translation type actuating mechanism is commonly used for adjusting a driven roller to horizontally move along a central axis of a weldment in a vertical mode to realize a channeling-prevention function, the horizontal movement of the driven roller is determined by forward and reverse rotation of a motor, but the rotating speed of the motor is a limited constant value, time is needed for translation of the driven roller and turning of a helical angle of the weldment, and if the motor does not act in time, shaft channeling displacement exceeds an allowable range; in order to ensure that the shaft shift is controlled within an allowable range within a specified time, the control is realized by adopting a nonlinear control law of displacement and speed negative feedback on a computer or a PLC (programmable logic controller) through theories of fuzzy control, adaptive control and the like, and a control system is complex; finally, the condition of the current domestic existing process determines that the deviation between the shape of the weldment and the theoretical shape is larger, namely the error ratio of roundness and cylindricity is larger, so that the amplitude and the randomness of axial movement of the weldment when rotating on the roller carrier are increased. Based on the problems, although a plurality of barrel weldment manufacturers need to weld the anti-channeling roller frame, the anti-channeling function is still finished by an operator looking at hand adjustment, and the automatic anti-channeling function is just one decoration.
To above problem, the utility model relates to a cylindric weldment axial float adjustment system on welding roller carrier realizes the timely translation of driven roller carrier, avoids axle float displacement to surpass the allowed range, reduces the requirement for precision of butt weld detection face simultaneously.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cylindric weldment axial float adjustment system on welding roller carrier for solving the current invalid problem of preventing axial float roller carrier automatic adjustment function.
The utility model discloses a solve above-mentioned technical problem not enough, the technical scheme who adopts is:
an axial float adjusting system for a cylindrical welding part on a welding roller frame comprises a pair of driving rollers for supporting the cylindrical welding part, the driving rollers are connected with a power mechanism to drive the cylindrical welding part to rotate, the two driving rollers are parallel to each other and are uniformly and tangentially supported below the cylindrical welding part, one end of one driving roller is also provided with a first driven roller with the axis coincident with the axis of the driving roller, the first driven roller is tangent with the cylindrical welding part, the first driven roller horizontally slides along the central connecting line direction of the two driving rollers, the direction of the first driven roller far away from the cylindrical welding part is defined as the direction a, the direction of the first driven roller near the cylindrical welding part is defined as the direction b, one end of the other driving roller is also provided with a second driven roller with the axis coincident with the axis of the driving rollers, the second driven roller is tangent with the cylindrical welding part, and the second driven roller horizontally slides along the central connecting line direction of the two driving rollers, the direction of the second driven roller far away from the cylindrical weldment is defined as the direction d, the direction of the second driven roller close to the cylindrical weldment is defined as the direction c, the device also comprises a cylindrical detection module, the detection module is coaxially arranged on the cylindrical weldment through a clamp, a first pressure sensor is arranged right above the detection module, a second pressure sensor is arranged right below the detection module, a third pressure sensor is arranged right left of the detection module, a fourth pressure sensor is arranged right of the detection module, and the distances between the first pressure sensor, the second pressure sensor, the third pressure sensor and the fourth pressure sensor and the detection module are 0-3mm, when the central line of the cylindrical weldment deviates upwards, the first pressure sensor is stressed by pressure, sends a signal to control the first driven roller to move towards the direction a, and meanwhile, the second driven roller moves towards the direction d; when the central line of the cylindrical weldment deviates downwards, the second pressure sensor is stressed by pressure, sends a signal to control the first driven roller to move towards the direction b, and meanwhile, the second driven roller moves towards the direction c; when the central line of the cylindrical weldment deviates leftwards, the third pressure sensor is stressed by pressure, sends a signal to control the first driven roller to move towards the direction b, and simultaneously the second driven roller moves towards the direction d; when the central line of the cylindrical welding part deviates to the right, the fourth pressure sensor is stressed by pressure, sends a signal to control the first driven roller to move towards the direction a, and simultaneously the second driven roller moves towards the direction c;
when the central line of the cylindrical weldment deviates upwards to the right, the first pressure sensor and the fourth pressure sensor are stressed by pressure, signals are sent out to control the first driven roller to move towards the direction a, when the output signal of the first pressure sensor is zero, the first driven roller continues to move towards the direction a, and meanwhile, the second driven roller moves towards the direction c; when the output signal of the fourth sensor is zero, the first driven roller continues to move towards the direction a, and the second driven roller moves towards the direction d;
when the central line of the cylindrical weldment deviates upwards leftwards, the first pressure sensor and the third pressure sensor are stressed by pressure, signals are sent out to control the second driven roller to move towards the direction d, when the output signal of the first pressure sensor is zero, the second driven roller moves towards the direction d, and the first driven roller moves towards the direction b; when the output signal of the third pressure left sensor is zero, the second driven roller moves towards the direction d, and the first driven roller moves towards the direction a;
when the central line of the cylindrical weldment deviates leftwards and downwards, the second pressure sensor and the third pressure sensor are stressed by pressure, signals are sent out to control the second driven roller to move towards the direction b, when the output signal of the second pressure sensor is zero, the first driven roller continues to move towards the direction b, and the second driven roller moves towards the direction d; when the output signal of the third pressure sensor is zero, controlling the first driven roller to continue to move towards the direction b, and controlling the second driven roller to move towards the direction c;
when the central line of the cylindrical welding part deviates downwards to the right, the second pressure sensor and the fourth pressure sensor are stressed by pressure, signals are sent out to control the second driven roller to move towards the direction c, when the output signal of the second pressure sensor is zero in the adjusting process, the second driven roller continues to move towards the direction c, and the first driven roller moves towards the direction a; and if the output signal of the fourth pressure sensor is zero, the second driven roller continues to move towards the direction c, and the first driven roller moves towards the direction b.
The detection module adopts a cylinder with the diameter of 1/20-1/5 of the cylindrical weldment, the outer wall of the cylinder is subjected to finish machining, a connecting shaft coincident with the center line of the cylinder is installed on one side wall of the cylinder, the cylinder is connected onto the clamp through the connecting shaft, and one end, away from the connecting shaft, of the cylinder is subjected to finish machining.
The utility model has the advantages that: the detection surface is changed from the original cylindrical weldment end surface to the cylindrical surface of a detection module (shown in figure 17), the detection block module is simple in shape and small in size, can be reduced to 1/20-1/5, and the machining precision can easily meet the requirement, so that the end surface precision requirement of the cylindrical weldment is reduced, and the problems of high machining difficulty and high cost of the end surface of a large weldment are solved; the physical quantity that the tradition detected is for the displacement with the axial float that is taking place, the utility model discloses the physical quantity that detects is because of the axis nonparallel detects piece module (fig. 20) to four pressure sensor's effort, when leading to being about to take place the axial float and not taking place the float because of gyro wheel axis and weldment the central axis nonparallel like this, first driven roller and second driven roller have started to remove under control system, and the assurance action is timely, and to a great extent avoids axle float displacement to exceed the allowed band.
Drawings
Fig. 1 is a front view of the fixture in the installation process of the present invention.
Fig. 2 is a side view of the fixture during installation.
Fig. 3 is a front view of the middle clamp body of the present invention.
Fig. 4 is a side view of fig. 3 according to the present invention.
Fig. 5 is a schematic structural view of the middle left support block of the present invention.
Fig. 6 is a side view of fig. 5 according to the present invention.
Fig. 7 is a top view of fig. 5 according to the present invention.
Fig. 8 is a schematic structural view of the middle clamp pin according to the present invention.
Fig. 9 is a right side view of fig. 8 in the present invention.
Fig. 10 is a left side view of fig. 8 in the present invention.
Fig. 11 is a schematic diagram of the state that the clamp is separated from the groove after the left supporting block and the right supporting block are moved.
Fig. 12 is a side view of fig. 11 according to the present invention.
Fig. 13 is a schematic structural view of the middle jaw clamping cylinder of the present invention.
Fig. 14 is a side view of fig. 13 according to the present invention.
Fig. 15 is the structure diagram of the utility model discloses well anchor clamps are installed on the welding barrel.
Fig. 16 is a side view of fig. 15 according to the present invention.
Fig. 17 is a schematic view of the detection module being mounted on the fixture according to the present invention.
Fig. 18 is a schematic structural diagram of the detection module of the present invention.
Fig. 19 is a side view of the detection module of the present invention.
Fig. 20 is a schematic view of the installation of the adjusting system of the present invention.
Fig. 21 is a side view of fig. 20 according to the present invention.
Fig. 22 is a top view of fig. 21 according to the present invention.
Graphic notation: 1. the clamping device comprises a base, 2, a support, 3, a second motor, 4, a second lead screw, 5 columns, 6, a third motor, 7, a transmission shaft, 8, a taper pin, 9, a disc, 10, a positioning pin, 11, a clamp body, 12, an aluminum alloy frame, 13, an organic glass plate, 14, a clamping pin, 15, a screw sleeve, 16, a fixing sleeve, 17, a clamping rod, 18, a key, 19, a first guide block, 20, a reset spring, 21, a second guide block, 22, a clamping jaw, 23, a pressure sensor, 24, a first motor, 25, a first lead screw, 26, a left support block, 27 and a right support block; 28. a detection module; 29. cylindrical weldment, 30, first pressure sensor, 31, third pressure sensor, 32, second pressure sensor, 33, fourth pressure sensor, 34, first driven roller, 35, second driven roller, 36, driving roller.
Detailed Description
The specific embodiment shown in the figure is as follows:
a system for adjusting axial movement of a cylindrical welding part on a welding roller frame comprises a pair of driving rollers 36 used for supporting the cylindrical welding part 29, the driving rollers 36 are connected with a power mechanism to drive the power mechanism to rotate, the two driving rollers 36 are parallel to each other and are supported below the cylindrical welding part 29 in a tangent mode, one end of one driving roller is further provided with a first driven roller 34, the axis of the first driven roller is coincident with the axis of the driving roller, the first driven roller 34 is tangent with the cylindrical welding part 29, the first driven roller 34 horizontally slides along the central connecting line direction of the two driving rollers 36, the direction that the first driven roller 34 is far away from the cylindrical welding part 29 is defined as the a direction, and the direction that the first driven roller 34 is close to the cylindrical welding part 29 is defined as the b direction. One end of the other driving roller 36 is further provided with a second driven roller 35 with an axis coinciding with the axis of the driving roller 36, the second driven roller 35 is tangent to the cylindrical weldment 29, the second driven roller 35 horizontally slides along the central line direction of the two driving rollers 36, the direction of the second driven roller 35 far away from the cylindrical weldment 29 is defined as the direction d, the direction of the second driven roller 35 close to the cylindrical weldment 29 is defined as the direction c, the fixture further comprises a cylindrical detection module 28, the detection module 28 is coaxially mounted on the cylindrical weldment 29 through the fixture body 11, the fixture body 11 is mounted on the cylindrical weldment 29 through a fixture mounting tool, and the fixture mounting tool specifically adopts the following structure:
the fixture installation tool comprises a base 1, a support 2 used for forming height difference on the base 1 is installed on the base 1, a left support block 26 and a right support block 27 which are matched with each other are arranged on the base 1 on one side of the support 2 in a sliding mode, the left support block 26 and the right support block 27 are driven by a first driving device to slide simultaneously to adjust the distance between the left support block 26 and the right support block 27, the left support block 26 and the right support block 27 are both of an L-shaped plate structure, grooves which are vertically formed in the left support block 26 and the right support block 27 are formed in the left support block 26, the width of each groove is the same as the thickness of the fixture body 11, the fixture body 11 is supported in the grooves in a sliding mode, the center line of the fixture body 11 coincides with the center line of a cylindrical welding part 29 on a welding frame, and after the fixture body 11 is separated from the grooves of the left support block 26 and the right support block 27, platforms used for supporting the fixture body 11 are The core line slides. The clamp body 11 comprises an aluminum alloy frame 12 and an organic glass plate 13, the organic glass plate 13 covers one side of the aluminum alloy frame 12 close to the upright post 5, the two are fixed together through screws, a clamp central hole is formed in the center position of the clamp body 11, a threaded sleeve 15 penetrates through the clamp central hole, a clamping pin 14 penetrating through the clamp body 11 is screwed in a central threaded hole of the threaded sleeve 15, the central line of the clamping pin 14 is superposed with the central line of the clamp 11, two ends of the clamping pin 14 extend to the outside of the central hole, a square hole is formed in the center position of one end, close to the support 2, of the clamping pin 14, one end, far away from the support 2, of the clamping pin 14 is processed into a conical surface, four groups of guide blocks are arranged on one side, far away from the support 2, of the clamp body 11, each group of guide blocks comprises a first guide block 19 and, each group of guide blocks is provided with a clamping rod 17 in a sliding penetrating mode, a key 18 is arranged between a first guide block 19 and the clamping rod 17 to limit the sliding direction of the clamping rod 17, one end of the clamping rod 17 is pressed against the conical surface of the clamping pin 14, the outer cover is provided with a fixing sleeve 16, the other end of the clamping rod 17 is provided with a clamping jaw 22, the clamping rod 17 is further sleeved with a return spring 20, one end of the return spring 20 is pressed against a second guide block 21, the other end of the return spring 20 is pressed against the outer wall of the clamping rod 17, the clamping rod 17 is pressed against the conical surface of the clamping pin 14 through the elastic force of the return spring 20, the clamping pin 14 is screwed in a threaded sleeve, the clamping jaw 22 on the clamping rod 17 is pushed to extend outwards through the conical surface of the clamping pin 14 until the clamping jaw 22 is clamped on the inner wall of a cylindrical welding piece 29 on the welding frame to realize the installation of the clamp body 11, and a pressure sensor 23 is further installed at the joint of the, the pressure sensor 23 reaches a set value to determine that the clamping jaw 22 moves in place, the outer surface of the clamping pin 14 is provided with left-handed threads, the conical surface at the tail end is provided with four uniformly distributed narrow grooves, and the automatic positioning function can be realized through the narrow grooves
The support 2 on still have stand 5 through second drive arrangement slidable mounting, the slip direction of stand 5 is parallel with the central line direction of anchor clamps body 11, stand 5 top is rotated and is installed transmission shaft 7, transmission shaft 7 drives its rotation through the third drive arrangement, the central line of transmission shaft 7 and the coincidence of the centre bore central line of clamp pin 14, transmission shaft 7 is close to anchor clamps body 11 one end design and has the square terminal surface that matches each other with the quad slit of clamp pin 14, insert the drive clamp pin 14 precession in the quad slit through square terminal surface, thereby automatic control clamp pin 14's conical surface promotes jack catch 22 on the clamping bar 17 and outwards extends until the chucking is on the cylindrical weldment 29 inner wall on the welding gyro wheel frame.
The first driving device comprises a first motor 24 and a first lead screw 25, the first motor 24 drives the first lead screw 25 to rotate, a left supporting block 26 and a right supporting block 27 are mounted on the first lead screw 25 through a nut pair, the center position of the first lead screw 25 is located right below the position of the center line of the clamp, and the first lead screw 25 is provided with threads with opposite rotation directions from the center to the two sides. When the first motor 24 drives the first lead screw 25 to rotate, because the thread turning directions of the two ends are opposite, the left supporting block 26 and the right supporting block 27 are close to each other until contacting, and at the moment, the fixture is placed in the groove through the hoisting device to realize accurate positioning of the fixture. The second driving device comprises a second motor and a second lead screw, the second motor 3 drives the second lead screw 4 to rotate, and the upright post 5 is installed on the second lead screw 4 through a nut pair. The third driving device comprises a third motor 6, the third motor 6 drives a transmission shaft 7 to rotate, the transmission shaft 7 is fixedly provided with a disc 9 through a taper pin 8, one end of the disc 9, which is close to the clamp body 11, is provided with four positioning pins 10, the clamp body 11 is provided with four cam-shaped grooves which are mutually matched with the positioning pins 10, the second motor 3 drives the second lead screw 4 to rotate, the stand 5 is driven to move towards the clamp body 11 through the second lead screw 4, the transmission shaft 7 and the disc 9 on the stand 5 move along with the rotation of the second lead screw 4, when the four positioning pins 10 are inserted into the cam-shaped grooves on the clamp body 11, the positioning pins 10 are located at the large-diameter positions of the cam-shaped grooves, the square end face at the tail end of the transmission shaft 7 is just inserted into the square hole of the clamping pin 14, the second motor 3. The third motor 6 starts to rotate, the disc 9 drives the positioning pin 10 to rotate from the large-diameter position to the small-diameter position of the cam-shaped groove on the clamp body 11, the clamp body 11 is clamped, the transmission shaft 7 inserted into the square hole of the clamping pin 14 pushes the clamping pin 14 to rotate, and then the conical surface of the clamping pin 14 pushes the clamping rod 17 to drive the clamping jaw 22 to move towards the direction far away from the central line of the clamp 11. After the positioning pin 10 moves to the small-diameter position of the cam-shaped groove, the third motor 6 stops rotating, the first motor 24 reversely rotates, the left supporting block 26 and the right supporting block 27 move towards the left end and the right end of the first lead screw 25, so that the clamp body 11 is separated from the groove, but the clamp body 11 is still supported on a platform of the left supporting block 26 and the right supporting block 27 but cannot block the axial movement of the clamp body 11, then the first motor 24 stops rotating, the second motor 3 starts rotating to drive the whole clamp 11 to move towards the end face of the cylindrical welding part 29, and when the clamp body 11 stops rotating at a position 15-20mm away from the end face of the cylinder body.
Then the third motor 6 rotates, the clamping pin 14 continues to move towards the cylinder of the cylindrical weldment 29, at this time, the conical surface of the clamping pin 14 pushes the clamping rod 17 to drive the clamping jaw 22 to move towards the inner wall of the cylindrical weldment 29 and gradually clamp the inner wall of the cylinder of the cylindrical weldment 29, then the third motor 6 rotates reversely to drive the transmission shaft 7 to rotate, the rotating shaft 7 drives the disc 9 and the positioning pin 10 to rotate through the conical pin 8, at this time, the positioning pin 10 moves towards the large-diameter position of the cam groove of the clamp body 11, so as to loosen the clamp body 11, when the clamping jaw 22 gradually clamps the inner wall of the cylinder, the pressure sensor 23 on the clamping jaw 22 is squeezed, and when the limit value of the pressure is reached,
finally, the first motor 24 continues to rotate, so that the left support block 26 and the right support block 27 move towards the left end and the right end of the first lead screw 25, and the clamp body 11 is not supported any more. The second motor 3 rotates to control the disc 9 and the positioning pin 10 to be separated from the clamp, the disc is moved to an initial position, and then a detection module with a small size specification is installed in a direction hole of the clamp, so that the transfer of a detection end face is realized.
A first pressure sensor 30 is arranged right above the detection module 28, a second pressure sensor 32 is arranged right below the detection module 28, a third pressure sensor 31 is arranged right left of the detection module, a fourth pressure sensor 33 is arranged right of the detection module, the distance between the first pressure sensor 30, the second pressure sensor 32, the third pressure sensor 31 and the fourth pressure sensor 33 and the detection module is 0-3mm (0 mm is adopted, the effect is best, no error exists, but the ideal situation exists, and 1mm or 2mm or other numerical values can be adopted under the condition that 3mm is the maximum allowable error), when the central line of the cylindrical weldment 29 deviates upwards, the first pressure sensor 30 is stressed by pressure, and sends a signal to control the first driven roller 31 to move towards the direction a, and meanwhile, the second driven roller 35 moves towards the direction d; when the central line of the cylindrical weldment 29 deviates downwards, the second pressure sensor 32 is subjected to pressure stress, and sends a signal to control the first driven roller 34 to move towards the direction b, and meanwhile, the second driven roller 35 moves towards the direction c; when the central line of the cylindrical weldment deviates leftwards, the third pressure sensor 31 is stressed to send a signal to control the first driven roller 34 to move towards the direction b, and meanwhile, the second driven roller 35 moves towards the direction d; when the central line of the cylindrical weldment is deviated to the right, the fourth pressure sensor 33 is subjected to compressive stress, and sends a signal to control the first driven roller 34 to move towards the direction a, and simultaneously the second driven roller 35 moves towards the direction c.
When the central line of the cylindrical weldment 29 deviates upwards and rightwards, the first pressure sensor 30 and the fourth pressure sensor 33 are subjected to compressive stress, signals are sent out to control the first driven roller 34 to move towards the direction a, when the output signal of the first pressure sensor 30 is zero, the first driven roller 34 continues to move towards the direction a, and meanwhile, the second driven roller 35 moves towards the direction c; when the output signal of the fourth pressure sensor 33 is zero, the first driven roller 34 continues to move in the direction a, while the second driven roller 35 moves in the direction d.
When the central line of the cylindrical weldment 29 deviates upwards leftwards, the first pressure sensor 30 and the third pressure sensor 31 are stressed by pressure, signals are sent out to control the second driven roller 35 to move towards the direction d, when the output signal of the first pressure sensor 30 is zero, the second driven roller 35 moves towards the direction d, and the first driven roller 34 moves towards the direction b; when the output signal of the third pressure left sensor 31 is zero, the second driven roller 35 moves in the direction d, and the first driven roller 34 moves in the direction a.
When the central line of the cylindrical weldment 29 deviates leftwards and downwards, the second pressure sensor 32 and the third pressure sensor 31 are stressed by pressure, signals are sent out to control the second driven roller 35 to move towards the direction b, when the output signal of the second pressure sensor 32 is zero, the first driven roller 34 continues to move towards the direction b, and the second driven roller 35 moves towards the direction d; when the output signal of the third pressure sensor 31 is zero, the first driven roller 34 is controlled to continue moving in the direction b, and the second driven roller 35 is controlled to move in the direction c.
When the central line of the cylindrical weldment 29 deviates downwards and rightwards, the second pressure sensor 32 and the fourth pressure sensor 33 are subjected to compressive stress, signals are sent out to control the second driven roller 35 to move towards the direction c, when the output signal of the second pressure sensor 32 is zero in the adjusting process, the second driven roller 35 continues to move towards the direction c, and the first driven roller 34 moves towards the direction a; when the output signal of the fourth pressure sensor 33 is zero, the second driven roller 35 continues to move in the direction c, and the first driven roller 34 moves in the direction b.
In the adjusting process, when the output signal of the pressure sensor in the corresponding direction is zero, the adjustment in place is indicated to stop the motion of the driven roller in the corresponding direction.
The detection module 28 adopts a cylinder with the diameter of 1/20-1/5 of cylindrical weldment, the outer wall of the cylinder is processed by finish machining, a connecting shaft which is coincident with the central line of the cylinder is arranged on one side wall of the cylinder, the cylinder is connected to a clamp through the connecting shaft, one end of the cylinder, which is far away from the connecting shaft, is processed by finish machining, the detection module 28 guarantees the coaxiality requirement of the cylindrical surface C and the square surface D as shown in figure 18, thus the detection module 28 and the cylindrical weldment 29 are guaranteed to rotate concentrically, meanwhile, to ensure the size and the shape and position accuracy of the end surface A, B and the cylindrical surface C, the end surface A or the cylindrical surface C is a test end surface for detecting the axial movement of the end surface of the weldment, therefore, the end face of the traditional cylindrical weldment is used as a test end face and is converted into the end face A or the cylindrical surface C of the test block 28 to be used as the test end face, and the processing requirement on the detection end face of the weldment and the shape deviation requirement on the appearance of a workpiece are reduced.
The technical solution and the implementation method listed in the present invention are not limiting, and the technical solution and the implementation method listed in the present invention are equivalent or have the same effect.