CN109765121B - Bending resistance testing mechanism and method for automobile pipe parts - Google Patents
Bending resistance testing mechanism and method for automobile pipe parts Download PDFInfo
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- CN109765121B CN109765121B CN201910012235.5A CN201910012235A CN109765121B CN 109765121 B CN109765121 B CN 109765121B CN 201910012235 A CN201910012235 A CN 201910012235A CN 109765121 B CN109765121 B CN 109765121B
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Abstract
The invention discloses a bending resistance testing mechanism for automobile pipe parts, which comprises a horizontal testing base, wherein a horizontal T-shaped slide rail groove is formed in the horizontal testing base, a sliding table is arranged in the T-shaped slide rail groove in a sliding manner, and the sliding table can slide along the length direction of the T-shaped slide rail groove; the sliding table is provided with a sliding rail, and the length extending direction of the sliding rail is parallel to the length extending direction of the T-shaped sliding rail groove; the invention enables the first V-shaped grooved wheel and the second V-shaped grooved wheel to move close to each other at the same speed; so that the jacking head is always positioned right above the midpoint of a connecting line between the first V-shaped grooved wheel and the second V-shaped grooved wheel; the stress point when the jacking head jacks and bends the measured pipe downwards is always positioned at the midpoint of the connecting line between the first V-shaped grooved wheel and the second V-shaped grooved wheel, so that the consistency of the bending resistance detection is ensured.
Description
Technical Field
The invention belongs to the field of automobile inspection tools, and particularly relates to a bending resistance testing mechanism and method for automobile pipe parts.
Background
Automobile pipe spare part is many, and its bending resistance test needs the fulcrum of setting up of different distances, and the fulcrum accommodation process of current bending resistance examine utensil is too complicated, and the mid point top of the line between two set up fulcrums is the best position of pushing down of top pressure head, and traditional examine utensil still need adjust the position of this top pressure head in real time, and the process is heavier.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a bending resistance testing mechanism and a method for automobile pipe parts.
The technical scheme is as follows: in order to achieve the purpose, the bending resistance testing mechanism for the automobile pipe parts comprises a horizontal testing base, wherein a horizontal T-shaped slide rail groove is formed in the horizontal testing base, a sliding table is arranged in the T-shaped slide rail groove in a sliding mode, and the sliding table can slide along the length direction of the T-shaped slide rail groove; the sliding table is provided with a sliding rail, and the length extending direction of the sliding rail is parallel to the length extending direction of the T-shaped sliding rail groove; a sliding block is arranged in the sliding rail in a sliding manner and can slide along the length direction of the sliding rail; a vertical first support is fixedly arranged on the sliding block, and a vertical second support is fixedly arranged on the upper side of the right end of the sliding table; a third support is fixedly arranged at the left end of the horizontal testing base;
the second support is provided with a through bearing hole, and a bearing is tightly matched and installed in the bearing hole; a first transmission threaded hole is formed in the first support, and a second transmission threaded hole is formed in the third support; the bearing, the first transmission threaded hole and the second transmission threaded hole are coaxially arranged;
the right end shaft wall of the transmission shaft is tightly matched and mounted with the inner ring of the bearing; the transmission shaft is provided with a first section of thread and a second section of thread along the length direction, the spiral directions of the first section of thread and the second section of thread are the same, and the spiral distance of the second section of thread is twice of that of the first section of thread; the first section of threads are in threaded transmission connection with a second transmission threaded hole in the third support; the second section of threads are in threaded transmission connection with the first transmission threaded hole in the first support;
the right end part of the transmission shaft is coaxially provided with a measuring rod insertion hole; a fourth support is fixedly arranged at the right end of the horizontal test base; the right end of the measuring rod is fixedly connected with the fourth support, and the left end of the measuring rod is inserted into the measuring rod insertion hole in a sliding manner; the outer surface of the measuring rod is provided with scale marks in a linear array along the length direction, and the outline of the right end of the transmission shaft corresponds to the scale marks on the measuring rod
The first support is fixedly provided with a first sheave bracket, the second support is provided with a second sheave bracket, and the first sheave bracket and the second sheave bracket are respectively and rotatably provided with a first V-shaped sheave and a second V-shaped sheave;
the device also comprises a pipe to be measured, wherein two ends of the pipe to be measured are horizontally erected on the first V-shaped grooved wheel and the second V-shaped grooved wheel; a top bending mechanism is also arranged above the pipe to be measured; the bending mechanism can bend the pipe to be tested downwards.
Furthermore, a power-assisted rotary table is arranged at the left end of the transmission shaft.
Further, the ejection bending mechanism comprises a fixedly installed vertical supporting arm, the upper end of the vertical supporting arm is fixedly connected with a transverse cantilever beam, a vertical hydraulic device is installed on the cantilever beam, a thrust sensor is installed on a hydraulic push rod of the hydraulic device, and an ejection head is fixedly installed at the tail end of the hydraulic push rod; the pushing head is positioned right above the midpoint of a connecting line between the first V-shaped grooved wheel and the second V-shaped grooved wheel.
Further, a test method of a bending resistance test mechanism of automobile pipe parts comprises the following steps:
horizontally erecting two ends of a pipe to be detected on the first V-shaped grooved wheel and the second V-shaped grooved wheel, driving a jacking head to downwards jack the middle part of the pipe to be detected by a hydraulic device, gradually pressurizing by the hydraulic device, stopping pressurizing by the hydraulic device after the jacking pressure detected by a thrust sensor reaches a preset value, driving the jacking head to upwards retract by the hydraulic device, judging whether the pipe to be detected has obvious plastic bending deformation, and judging that the pipe to be detected is unqualified if the pipe to be detected has obvious plastic bending deformation;
before bending resistance testing, the distance between the first V-shaped grooved wheel and the second V-shaped grooved wheel is required to be adjusted according to the length of a pipe to be tested; if the distance between the first V-shaped grooved wheel and the second V-shaped grooved wheel needs to be adjusted to be small, the power-assisted rotary wheel disc is manually rotated clockwise, so that the transmission shaft rotates clockwise, at the moment, the first section of threads perform thread transmission in the second transmission threaded hole, and the second section of threads perform thread transmission in the first transmission threaded hole; the third support is in a fixed installation state, so that the transmission shaft is driven by the threads between the first section of threads and the second transmission threaded hole to move leftwards, and the transmission shaft is tightly matched and connected with the second support through the bearing, so that the leftward movement of the transmission shaft drives an integrated structure formed by the second support and the sliding table to synchronously move leftwards along the T-shaped sliding rail groove, and further the second V-shaped groove wheel moves leftwards;
meanwhile, the thread transmission between the second section of thread and the first transmission thread hole enables the integrated structure formed by the first support and the sliding block to move rightwards, and further the first V-shaped groove wheel moves rightwards; so that the first V-shaped grooved wheel and the second V-shaped grooved wheel move close to each other;
the spiral pitch of the second section of the thread is twice that of the first section of the thread, so that the transmission speed of the second section of the thread is one time that of the first section of the thread under the same rotating speed of the transmission shaft, namely the transmission speed of the first section of the thread is v, and the transmission speed of the second section of the thread is v; the second support and the transmission shaft are synchronous in the axis direction, so that the absolute speed of the second support running leftwards is V, and the second V-shaped pulley displaces leftwards with the absolute speed of V;
the transmission of the second section of screw thread enables the relative speed of the first support relative to the right of the transmission shaft to be 2v, and the transmission shaft moves leftwards at the speed of v under the transmission of the first section of screw thread, so the absolute speed of the first support to the right is 2v-v ═ v; so that the first V-shaped groove wheel makes displacement with the absolute velocity V to the right;
so that the first V-shaped grooved wheel and the second V-shaped grooved wheel move close to each other at the same speed; so that the jacking head is always positioned right above the midpoint of a connecting line between the first V-shaped grooved wheel and the second V-shaped grooved wheel; the stress point when the jacking head jacks and bends the tested pipe downwards is always positioned at the midpoint of the connecting line between the first V-shaped grooved wheel and the second V-shaped grooved wheel, so that the consistency of the bending resistance detection is ensured;
the number displayed by the graduated scale line of the position of the profile at the right end of the transmission shaft is observed in real time in the process of adjusting the distance between the first V-shaped grooved wheel and the second V-shaped grooved wheel, and because the distance between the first V-shaped grooved wheel and the second V-shaped grooved wheel is in direct proportion to the insertion length of the measuring rod into the measuring rod insertion hole, the distance between the first V-shaped grooved wheel and the second V-shaped grooved wheel can be obtained by length conversion of the number displayed on the graduated scale line, and the measuring rod also plays a role in supporting the transmission shaft.
Has the advantages that: the invention enables the first V-shaped grooved wheel and the second V-shaped grooved wheel to move close to each other at the same speed; so that the jacking head is always positioned right above the midpoint of a connecting line between the first V-shaped grooved wheel and the second V-shaped grooved wheel; the stress point when the jacking head jacks and bends the measured pipe downwards is always positioned at the midpoint of the connecting line between the first V-shaped grooved wheel and the second V-shaped grooved wheel, so that the consistency of the bending resistance detection is ensured.
Drawings
FIG. 1 is a first schematic diagram of the overall structure of the scheme;
FIG. 2 is a second schematic view of the overall structure of the present solution;
FIG. 3 is a schematic view of the overall structure of the scheme with the pipe to be tested hidden;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a partial schematic view of the lower portion of FIG. 3;
FIG. 6 is a schematic view of the disassembled structure of FIG. 3;
FIG. 7 is a schematic view of a transmission shaft structure;
fig. 8 is a schematic structural view of fig. 1 with the transmission shaft, the sliding table, the sliding block, the first support and the second support omitted.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 8, the bending resistance testing mechanism for automobile pipe parts comprises a horizontal testing base 13, wherein a horizontal T-shaped slide rail groove 28 is formed in the horizontal testing base 13, a sliding table 20 is slidably arranged in the T-shaped slide rail groove 28, and the sliding table 20 can slide along the length direction of the T-shaped slide rail groove 28; a slide rail 27 is arranged on the sliding table 20, and the length extending direction of the slide rail 27 is parallel to the length extending direction of the T-shaped slide rail groove 28; a sliding block 12 is arranged in the sliding rail 27 in a sliding manner, and the sliding block 12 can slide along the length direction of the sliding rail 27; a vertical first support 7 is fixedly mounted on the sliding block 12, and a vertical second support 17 is fixedly mounted on the upper side of the right end of the sliding table 20; a third support 11 is fixedly arranged at the left end of the horizontal testing base 13;
a through bearing hole is formed in the second support 17, and a bearing 26 is tightly installed in the bearing hole; a first transmission threaded hole 24 is formed in the first support 7, and a second transmission threaded hole 25 is formed in the third support 11; the bearing 26, the first transmission threaded hole 24 and the second transmission threaded hole 25 are coaxially arranged;
the bearing is characterized by further comprising a transmission shaft 10, wherein the right end shaft wall of the transmission shaft 10 is tightly matched and mounted with the inner ring of the bearing 26; a first section of thread 8 and a second section of thread 14 are respectively arranged on the transmission shaft 10 along the length direction, the spiral directions of the first section of thread 8 and the second section of thread 14 are the same, and the spiral distance of the second section of thread 14 is twice of the spiral distance of the first section of thread 8; the first section of screw thread 8 is in screw thread transmission connection with a second transmission screw hole 25 on the third support 11; the second section of threads 14 are in threaded transmission connection with a first transmission threaded hole 24 on the first support 7;
the right end part of the transmission shaft 10 is coaxially provided with a measuring rod insertion hole 29; a fourth support 22 is fixedly arranged at the right end of the horizontal testing base 13; the measuring rod 19 is coaxially arranged with the transmission shaft 10, the right end of the measuring rod 19 is fixedly connected with the fourth support 22, and the left end of the measuring rod 19 is slidably inserted into the measuring rod insertion hole 29; the outer surface of the measuring rod 19 is provided with scale marks in a linear array along the length direction, and the right end profile 10.1 of the transmission shaft 10 corresponds to the scale marks on the measuring rod 19
A first sheave bracket 23 is fixedly installed on the first support 7, a second sheave bracket 23.2 is installed on the second support 17, and a first V-shaped sheave 6 and a second V-shaped sheave 18 are respectively and rotatably installed on the first sheave bracket 23 and the second sheave bracket 23.2;
the device also comprises a measured pipe 16, and two ends of the measured pipe 16 are horizontally erected on the first V-shaped grooved wheel 6 and the second V-shaped grooved wheel 18; a top bending mechanism is also arranged above the pipe fitting 16 to be measured; the bending mechanism can bend the tested pipe fitting 16 downwards.
And the left end of the transmission shaft 10 is provided with a power-assisted rotary table 9.
The top bending mechanism comprises a vertical supporting arm 4 which is fixedly installed, the upper end of the vertical supporting arm 4 is fixedly connected with a transverse cantilever beam 2, a vertical hydraulic device 1 is installed on the cantilever beam 2, a thrust sensor 15 is installed on a hydraulic push rod 3 of the hydraulic device 1, and a top pressing head 5 is fixedly installed at the tail end of the hydraulic push rod 3; the jacking head 5 is positioned right above the midpoint of a connecting line between the first V-shaped groove wheel 6 and the second V-shaped groove wheel 18.
The bending resistance detection method, process and technical progress of the tested pipe fitting 16 are summarized as follows:
horizontally erecting two ends of a pipe 16 to be measured on the first V-shaped groove wheel 6 and the second V-shaped groove wheel 18, driving a jacking head 5 to downwards jack the middle part of the pipe 16 to be measured by the hydraulic device 1, gradually pressurizing the hydraulic device 1, stopping pressurizing the hydraulic device 1 after jacking pressure detected by the thrust sensor 15 reaches a preset value, driving the jacking head 5 to upwards retract by the hydraulic device 1, judging whether the pipe 16 to be measured has obvious plastic bending deformation or not, and judging that the pipe 16 to be measured is unqualified if the pipe 16 to be measured has obvious plastic bending deformation;
before the bending resistance test, the distance between the first V-shaped groove wheel 6 and the second V-shaped groove wheel 18 needs to be adjusted according to the length of the tested pipe fitting 16; if the distance between the first V-shaped groove wheel 6 and the second V-shaped groove wheel 18 needs to be adjusted to be small, the power-assisted rotary wheel disc 9 is manually rotated clockwise, so that the transmission shaft 10 rotates clockwise, at the moment, the first section of threads 8 perform thread transmission in the second transmission threaded hole 25, and the second section of threads 14 perform thread transmission in the first transmission threaded hole 24; because the third support 11 is in a fixed installation state, the transmission of the thread between the first section of thread 8 and the second transmission threaded hole 25 makes the transmission shaft 10 displace leftward, and because the transmission shaft 10 is tightly connected with the second support 17 through the bearing 26, the leftward displacement of the transmission shaft 10 drives the integral structure formed by the second support 17 and the sliding table 20 to synchronously displace leftward along the T-shaped sliding rail groove 28, so that the second V-shaped grooved wheel 18 displaces leftward;
meanwhile, the thread transmission between the second section of threads 14 and the first transmission threaded hole 24 enables the integrated structure formed by the first support 7 and the sliding block 12 to displace rightwards, and further enables the first V-shaped groove wheel 6 to displace rightwards; so that the first V-shaped groove wheel 6 and the second V-shaped groove wheel 18 move close to each other;
because the screw pitch of the second section of the screw thread 14 is twice that of the first section of the screw thread 8, the transmission speed of the second section of the screw thread 14 is one time that of the first section of the screw thread 8 under the same rotating speed of the transmission shaft 10, namely the transmission speed of the first section of the screw thread 8 is v, and the transmission speed of the second section of the screw thread 14 is 2 v; because the second support 17 and the transmission shaft 10 are synchronous in the axial direction, the absolute speed of the second support 17 running leftward is V, and the second V-shaped grooved wheel 18 is displaced leftward by V;
the transmission of the second section of the thread 14 enables the relative speed of the first support 7 to the right relative to the transmission shaft 10 to be 2v, and the transmission shaft 10 moves to the left at the speed v under the transmission of the first section of the thread 8, so the absolute speed of the first support 7 to the right is 2 v-v; so that the first V-shaped groove wheel 6 makes displacement with the absolute velocity V towards the right;
so that the first V-shaped groove wheel 6 and the second V-shaped groove wheel 18 move close to each other at the same speed; so that the top pressure head 5 is always positioned right above the midpoint of the connecting line between the first V-shaped groove wheel 6 and the second V-shaped groove wheel 18; the stress point when the pushing head 5 pushes and bends the tested pipe fitting 16 downwards is always positioned at the middle point of the connecting line between the first V-shaped groove wheel 6 and the second V-shaped groove wheel 18, so that the consistency of the bending resistance detection is ensured;
the number displayed by the scale mark of the measuring rod 19 at the position of the right end profile 10.1 of the transmission shaft 10 is observed in real time in the process of adjusting the distance between the first V-shaped groove wheel 6 and the second V-shaped groove wheel 18, because the distance between the first V-shaped groove wheel 6 and the second V-shaped groove wheel 18 is in direct proportion to the insertion length of the measuring rod 19 into the measuring rod insertion hole 29, the distance between the first V-shaped groove wheel 6 and the second V-shaped groove wheel 18 can be obtained by converting the length of the number displayed on the scale mark, and the measuring rod 19 also plays a role in supporting the transmission shaft 10.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (4)
1. The utility model provides a bending resistance accredited testing organization of car pipe class spare part which characterized in that: the test device comprises a horizontal test base (13), wherein a horizontal T-shaped slide rail groove (28) is formed in the horizontal test base (13), a slide table (20) is arranged in the T-shaped slide rail groove (28) in a sliding mode, and the slide table (20) can slide along the length direction of the T-shaped slide rail groove (28); a sliding rail (27) is arranged on the sliding table (20), and the length extending direction of the sliding rail (27) is parallel to the length extending direction of the T-shaped sliding rail groove (28); a sliding block (12) is arranged in the sliding rail (27) in a sliding mode, and the sliding block (12) can slide along the length direction of the sliding rail (27); a vertical first support (7) is fixedly arranged on the sliding block (12), and a vertical second support (17) is fixedly arranged on the upper side of the right end of the sliding table (20); a third support (11) is fixedly arranged at the left end of the horizontal testing base (13);
a through bearing hole is formed in the second support (17), and a bearing (26) is tightly installed in the bearing hole; a first transmission threaded hole (24) is formed in the first support (7), and a second transmission threaded hole (25) is formed in the third support (11); the bearing (26), the first transmission threaded hole (24) and the second transmission threaded hole (25) are coaxially arranged;
the bearing is characterized by also comprising a transmission shaft (10), wherein the right end shaft wall of the transmission shaft (10) is tightly matched and installed with the inner ring of the bearing (26); a first section of thread (8) and a second section of thread (14) are respectively arranged on the transmission shaft (10) along the length direction, the spiral directions of the first section of thread (8) and the second section of thread (14) are the same, and the spiral distance of the second section of thread (14) is twice of the spiral distance of the first section of thread (8); the first section of screw thread (8) is in screw thread transmission connection with a second transmission screw hole (25) on the third support (11); the second section of screw thread (14) is in screw thread transmission connection with a first transmission screw hole (24) on the first support (7);
the right end part of the transmission shaft (10) is coaxially provided with a measuring rod insertion hole (29); a fourth support (22) is fixedly arranged at the right end of the horizontal testing base (13); the measuring rod (19) is coaxially arranged with the transmission shaft (10), the right end of the measuring rod (19) is fixedly connected with the fourth support (22), and the left end of the measuring rod (19) is inserted into the measuring rod insertion hole (29) in a sliding mode; the outer surface of the measuring rod (19) is provided with scale marks in a linear array along the length direction, and the right end profile (10.1) of the transmission shaft (10) corresponds to the scale marks on the measuring rod (19);
a first sheave bracket (23) is fixedly installed on the first support (7), a second sheave bracket (23.2) is installed on the second support (17), and a first V-shaped sheave (6) and a second V-shaped sheave (18) are respectively and rotatably installed on the first sheave bracket (23) and the second sheave bracket (23.2);
the device also comprises a pipe to be measured (16), wherein two ends of the pipe to be measured (16) are horizontally erected on the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18); a top bending mechanism is also arranged above the pipe (16) to be measured; the bending mechanism can bend the tested pipe (16) downwards.
2. The bending resistance test mechanism for the automobile pipe parts according to claim 1, characterized in that: and a power-assisted rotary table (9) is arranged at the left end of the transmission shaft (10).
3. The bending resistance test mechanism for the automobile pipe parts according to claim 2, characterized in that: the bending mechanism comprises a vertical supporting arm (4) which is fixedly installed, the upper end of the vertical supporting arm (4) is fixedly connected with a transverse cantilever beam (2), a vertical hydraulic device (1) is installed on the cantilever beam (2), a thrust sensor (15) is installed on a hydraulic push rod (3) of the hydraulic device (1), and a pushing head (5) is fixedly installed at the tail end of the hydraulic push rod (3); the jacking head (5) is positioned right above the midpoint of a connecting line between the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18).
4. The testing method of the bending resistance testing mechanism of the automobile pipe parts according to claim 3, characterized in that:
horizontally erecting two ends of a pipe (16) to be measured on the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18), driving a jacking head (5) to downwards jack the middle part of the pipe (16) to be measured by the hydraulic device (1), gradually pressurizing the hydraulic device (1), stopping pressurizing the hydraulic device (1) after the jacking pressure detected by the thrust sensor (15) reaches a preset value, driving the jacking head (5) to upwards retract by the hydraulic device (1), judging whether the pipe (16) to be measured has obvious plastic bending deformation or not, and judging that the pipe (16) to be measured is unqualified if the pipe (16) to be measured has obvious plastic bending deformation;
before the bending resistance test, the distance between the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18) is required to be adjusted according to the length of a tested pipe (16); if the distance between the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18) needs to be reduced, the power-assisted rotary wheel disc (9) is manually rotated clockwise, so that the transmission shaft (10) rotates clockwise, at the moment, the first section of threads (8) perform thread transmission in the second transmission threaded hole (25), and the second section of threads (14) perform thread transmission in the first transmission threaded hole (24); because the third support (11) is in a fixed installation state, the transmission shaft (10) is driven by the threads between the first section of threads (8) and the second transmission threaded hole (25) to move leftwards, and because the transmission shaft (10) is tightly matched and connected with the second support (17) through the bearing (26), the leftward movement of the transmission shaft (10) drives the integral structure formed by the second support (17) and the sliding table (20) to synchronously move leftwards along the T-shaped sliding rail groove (28), so that the second V-shaped grooved wheel (18) moves leftwards;
meanwhile, the thread transmission between the second section of thread (14) and the first transmission threaded hole (24) enables an integrated structure formed by the first support (7) and the sliding block (12) to displace rightwards, and further enables the first V-shaped grooved pulley (6) to displace rightwards; so that the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18) move close to each other;
the screw pitch of the second section of the screw thread (14) is twice that of the first section of the screw thread (8), so that the transmission speed of the second section of the screw thread (14) is one time that of the first section of the screw thread (8) under the same rotating speed of the transmission shaft (10), namely the transmission speed of the first section of the screw thread (8) is v, and the transmission speed of the second section of the screw thread (14) is 2 v; the second support (17) and the transmission shaft (10) are synchronous in the axial direction, so that the absolute speed of the second support (17) moving leftwards is V, and the second V-shaped grooved wheel (18) moves leftwards with the absolute speed being V;
the transmission of the second section of the screw thread (14) enables the relative speed of the first support (7) to the right relative to the transmission shaft (10) to be 2v, and the absolute speed of the first support (7) to the right is 2v-v since the transmission shaft (10) moves to the left with the speed v under the transmission of the first section of the screw thread (8); so that the first V-shaped grooved wheel (6) makes displacement with absolute velocity V towards the right;
so that the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18) move close to each other at the same speed; so that the jacking head (5) is always positioned right above the midpoint of a connecting line between the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18); the stress point when the pushing head (5) pushes and bends the measured pipe (16) downwards is always positioned at the midpoint of a connecting line between the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18), so that the consistency of the bending resistance detection is ensured;
the method comprises the steps that the number displayed by the scale mark of the measuring rod (19) at the position of the right end profile (10.1) of the transmission shaft (10) is observed in real time in the process of adjusting the distance between the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18), because the distance between the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18) is in direct proportion to the insertion length of the measuring rod (19) into the measuring rod insertion hole (29), the distance between the first V-shaped grooved wheel (6) and the second V-shaped grooved wheel (18) can be obtained by converting the length of the number displayed on the scale mark, and the measuring rod (19) also plays a role in supporting the transmission shaft (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910012235.5A CN109765121B (en) | 2019-01-07 | 2019-01-07 | Bending resistance testing mechanism and method for automobile pipe parts |
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| CN201910012235.5A CN109765121B (en) | 2019-01-07 | 2019-01-07 | Bending resistance testing mechanism and method for automobile pipe parts |
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| CN109765121A CN109765121A (en) | 2019-05-17 |
| CN109765121B true CN109765121B (en) | 2021-11-05 |
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| CN109765122B (en) * | 2019-01-07 | 2021-12-14 | 南昌申宝汽车部件有限公司 | Automobile part bending resistance testing fixture and use method thereof |
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