A testing machine for fatigue detection of metal materials

Abstract

The present invention provides a testing machine for fatigue testing of metal materials, belonging to the field of metal detection technology. The machine comprises an assembly base, with hydraulic cylinders mounted at each of the four corners of the assembly base, a top plate mounted at the movable end of the hydraulic cylinder, and locking units mounted at the center of the assembly base and at the rear of the top plate, each including a rotating base. The present invention solves the problem of a fixed fitting range, an inability to dynamically adjust to the shape of the metal part, an inability to expand the fitting range of the locking device, insufficient locking restraint, and the occurrence of misalignment and deviation in the locking area during testing.

Description

Technical Field

[0001] The invention belongs to the technical field of metal detection, and in particular relates to a testing machine for metal material fatigue detection. Background Art

[0002] In modern industry, corrosion, fracture, and wear are the main causes of failure of mechanical parts and engineering components. Corrosion and wear progress slowly and can be avoided by regularly replacing parts or performing repairs. However, fracture often occurs suddenly and is unpredictable. Actual engineering practice shows that the vast majority of fractures are caused by fatigue. The maximum stress at which a material can withstand an infinite number of alternating loads without causing damage is called fatigue strength or fatigue limit. For example, in shafts, gears, bearings, blades, springs, etc., the stress at each point changes periodically over time. Although the stress on the parts is lower than the yield point of the material, the phenomenon of cracks or sudden complete fracture after a long period of operation is called metal fatigue. In order to accurately calculate the life of the metal, ensure that the metal material operates within the fatigue limit, and ensure the safe operation of the equipment, it is necessary to use fatigue testing equipment to conduct relevant experiments.

[0003] When the current locking equipment for detecting metal is used to lock and detect metal parts, the fitting range remains unchanged and cannot be dynamically changed according to the size of the metal parts. The fitting range of the locking equipment cannot be expanded, resulting in insufficient and unstable locking restraint capacity. During the test, misalignment and deviation occur in the locking area. Therefore, a testing machine for fatigue detection of metal materials is proposed. Summary of the Invention

[0004] The present invention provides a testing machine for fatigue detection of metal materials, which aims to solve the problems that the fitting range is unchanged, cannot be dynamically changed according to the shape of the metal part, cannot expand the fitting range of the locking device, makes the locking constraint ability insufficient and weak, and causes misalignment and deviation in the locking area during detection.

[0005] An embodiment of the present invention provides a testing machine for fatigue detection of metal materials, comprising an assembly seat, wherein hydraulic cylinders are installed at the four corners of the top of the assembly seat, a top plate is installed at the movable end of the hydraulic cylinder, a locking unit is installed at the top center area of ​​the assembly seat and the tail of the top plate, and the locking unit comprises a rotating base, a sliding bar 1 installed along the diameter is installed on the top of the rotating base, two translation platforms 1 are mirror-slid in the sliding bar 1, and a constraint platform 1 is installed on the two translation platforms 1, and a linkage circular table and The motor is rotatably connected to the linkage table, and the linkage table is connected to the two displacement tables one by power transmission, and can pull the two displacement tables one to move outward and inward together. The constraint table one is equipped with a height locking plate, a supporting unit and a linkage control unit. The height locking plate is used to constrain the metal parts and can be installed inside the constraint table one for height displacement. The supporting unit is variably installed at the tail of the height locking plate to support the height locking plate. The linkage control unit can pull the height locking plate for height displacement, and fit and separate with the traction supporting unit and the height locking plate.

[0006] Preferably, platform layer 1 and platform layer 2 are arranged inside the constraint platform 1, a height displacement cavity is arranged on the side wall of the platform layer 2, the height displacement of the height locking plate is arranged in the height displacement cavity, an assembly chamber 1 is arranged in the constraint platform 1, and the linkage control unit is arranged in the assembly chamber 1.

[0007] Preferably, the supporting unit includes a pin-joining platform installed at the same distance on the top of the constraint platform, a pin-joining rod is installed on the pin-joining rod, a supporting rod and a bonding plate are installed on the pin-joining rod, the supporting rod is supported on the high and low locking plate, the bonding plate is displaced and extended into the bonding plate and connected to the linkage control unit, a sheet body is installed at the tail of the high and low locking plate and adapted to be installed with the supporting rod, a plurality of teeth are installed at the same distance along the length direction on the surface wall of the sheet body, one end of the supporting rod is supported in the tooth by being tilted to one side, a constraint plate is installed on the pin-joining platform and at the top of the supporting rod, a spiral beryllium copper wire is connected between the supporting rod and the constraint plate.

[0008] Preferably, the linkage control unit includes a supporting platform 1 and a supporting platform 2 installed in an assembly chamber 1, a power rod 1 is screwed onto the supporting platform 1, and the power rod 1 can rotate along the displacement of the installation direction, one end of the power rod 1 extends to the tail of the constraint platform 1 and is provided with a countersunk hole, and the other end is provided with a square hole, a power rod 2 that coincides with the center line of the power rod 1 is screwed onto the supporting platform 2, a square platform is installed at one end of the power rod 2, the square platform is installed in the square hole, two spiral beryllium copper wires are connected between the square platform and the inner wall of the square hole, the power rod 2 is provided with a rod body, a disc 1 that bites with the rod body is screwed into the assembly chamber 1, and both ends of the disc 1 are provided with round The second piece, the tail of the high and low locking piece is provided with a piece body 2 that can be engaged with the second round piece, the assembly chamber is provided with a supporting platform 3 at the bottom of the pin joint, the supporting platform 3 is provided with a guide rod that is installed along the power rod 1 and is extended, the guide rod is slidably provided with a displacement piece, the power rod 1 is provided with a protruding ring, the displacement piece is installed between the fitting piece and the protruding ring, and can be displaced inwardly through the power rod 1, thereby pulling the displacement piece and the fitting piece to displace together through the protruding ring, thereby pulling the supporting rod to deflect toward the top and separate from the tooth 1, a spiral beryllium copper wire 3 is connected between the guide rod and the displacement piece, and the spiral beryllium copper wire 3 is used to keep the displacement piece and the fitting piece in the separation stage at all times.

[0009] Preferably, a base platform is arranged at the bottom of the rotating base, a penetrating assembly chamber 2 is arranged at the center line of the base platform, and the motor is arranged in the assembly chamber 2.

[0010] Preferably, a thread X is installed on the top of the linkage table, and the thread X extends into the sliding bar 1. The tail of the displacement platform 1 is provided with an engaging tooth X that can be connected with the thread X by thread. The tail of the linkage table is provided with a recessed chamber, and the side of the recessed chamber is provided with a ring body with the same midline as the linkage table. A disc X is installed on the power end of the motor, and the disc X is linked to the ring body via multiple discs Y.

[0011] Preferably, a length-variable barrier unit is installed between the two displacement platforms and in a sliding bar. The length-variable barrier unit includes a plurality of barrier plates arranged in sequence of height. A connecting plate 1 inclined toward the tail is installed on the top of the barrier plate, and a connecting plate 2 extending 90 degrees toward the top is installed on one side of the connecting plate 1 facing each other. The two barrier plates close to each other in height, the connecting plate 1 of the higher barrier plate is slidably installed on the top of the lower barrier plate, and the lower barrier plate The connecting plate 2 of the piece is slidingly installed on the tail wall of the high barrier piece, and sliding plates are installed on both sides of each barrier piece. Supporting substrates are installed on both sides of the top of the sliding bar one and are extended along the installation direction. Several sliding grooves arranged in different heights and having gaps are installed inside the two supporting substrates. The sliding plates on both sides of each barrier piece are adapted to slide in the sliding grooves. The barriers at the top and tail ends of the length-changing barrier unit are fixedly connected to the two displacement platforms one.

[0012] Preferably, two sliding bars 2 are installed on the top of the rotating base, and the two sliding bars 2 are respectively installed on both sides of the sliding bar 1, and are installed at 90 degrees to each other. A displacement platform 2 is slidably installed in the sliding bar 2, and a constraint platform 2 is installed on the displacement platform 2. A linkage unit is connected between the constraint platform 2 and the two constraint platforms, and the linkage unit is used to pull the constraint platform 2 to move together with the two constraint platforms.

[0013] Preferably, the linkage unit includes an extension piece 2 installed on both sides of the constraint platform 2, the two extension pieces 2 are mirror-mounted around the sliding bar 2, a guide hole is installed on the extension piece 2, the constraint platform 1 is installed on the extension piece 1, a connecting guide rod is installed on the extension piece 1, the connecting guide rod is installed in the guide hole, and the side of the constraint platform 1 is provided with a accommodating hole for providing a path for the extension piece 2.

[0014] Preferably, the connecting guide rod includes a rod body and threaded sections installed at both ends of the rod body, a through hole is installed on the extension piece, the connecting guide rod is inserted into the through hole and the guide hole, so that the rod body is in the through hole and the guide hole, and the threaded tube is threadedly connected to the threaded sections at both ends of the connecting guide rod.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention has a motor installed inside, and the motor is dynamically connected to a displacement table used to pull the constraint table to move through a linkage circular table. The motor can pull the two constraint tables to move closer together to lock the metal parts and move them away to release the metal parts, which is beneficial to locking and releasing the metal parts and facilitating operation.

[0017] 2. The present invention has a high and low locking plate installed on the restraint platform, which can be pulled up and down by the linkage control unit. Therefore, the protrusion range of the high and low locking plate can be changed according to the size of the metal parts to be inspected, thereby changing the overall variable area, and can obtain locking in a larger area, ensuring stable locking, which is beneficial to the inspection of metal parts.

[0018] 3. The present invention is provided with a supporting unit, which can be used to support high and low locking plates, thereby achieving a better locking effect, making the locking of metal parts stable, and facilitating large-load detection of metal parts.

[0019] 4. The present invention can pull the height locking plate for displacement through the linkage control unit, and can also pull the supporting unit and the height locking plate to fit and connect and separate at the same time, that is, during the height displacement of the height locking plate, the supporting unit and the height locking plate are separated, but after the height locking plate changes, the supporting unit and the height locking plate are fit and connected. Through such an installation, the adaptability of the equipment can be made wider.

[0020] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the structure of a rotating base according to an embodiment of the present invention;

[0024] Figure 3 Schematic diagram of a top view of the structure of an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of the cross-sectional structure of an embodiment of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the inner part of an embodiment of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the inner part of an embodiment of the present invention;

[0028] Figure 7 A structural diagram of a constraint platform according to an embodiment of the present invention;

[0029] Figure 8For the embodiment of the present invention Figure 7 Schematic diagram of the structure at X;

[0030] Figure 9 Schematic diagram of the support rod connection structure according to an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the support rod separation structure according to an embodiment of the present invention;

[0032] Figure 11 A partial cross-sectional structural diagram of an embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of the structure of a length-variable barrier unit according to an embodiment of the present invention;

[0034] Figure 13 This is a structural diagram of a length-variable barrier unit according to an embodiment of the present invention.

[0035] Figure 14 This is a structural diagram of the second assembly constraint platform according to an embodiment of the present invention;

[0036] Figure 15 This is a schematic top view of the structure of the second assembly constraint platform according to an embodiment of the present invention;

[0037] Figure 16 A schematic diagram of the linkage unit structure according to an embodiment of the present invention;

[0038] Reference numerals: 11, assembly seat; 112, hydraulic cylinder; 113, top plate; 12, rotating base; 13, sliding bar 1; 14, translation platform 1; 15, constraint platform 1; 16, linkage circular platform; 17, motor; 18, height locking plate; 132, platform layer 1; 133, platform layer 2; 134, assembly chamber 1; 142, pin-jointed platform; 143, pin-jointed rod; 144, supporting rod; 145, bonding plate; 1 46. ​​Sheet (1); 147. Threaded end (1); 148. Constraint sheet; 149. Coiled beryllium copper wire (1); 152. Support platform (1); 153. Support platform (2); 154. Power rod (1); 155. Countersunk hole; 156. Square hole; 157. Power rod (2); 158. Square platform; 159. Coiled beryllium copper wire (2); 1510. Rod; 1521. Disc (1); 1522. Disc (2); 1523. Sheet 2; 1524, support platform 3; 1525, guide rod; 1526, displacement plate; 1527, protruding ring; 1528, spiral beryllium copper wire 3; 162, base platform; 163, assembly chamber 2; 172, thread X; 173, occlusal tooth X; 174, recessed chamber; 175, ring body; 176, disc X; 177, disc Y; 182, blocking plate; 183, connecting plate 1; 184, connecting Plate 2; 185, sliding plate; 186, supporting substrate; 187, sliding groove; 192, sliding bar 2; 193, displacement platform 2; 194, constraint platform 2; 1202, extension plate 2; 1203, guide hole; 1204, extension plate 1; 1205, connecting guide rod; 1206, accommodating hole; 1207, rod body; 1208, thread segment; 1209, through hole; 12010, thread cylinder. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Reference Figure 1-16The embodiment of the present invention provides a testing machine for fatigue detection of metal materials, which includes an assembly seat 11. Hydraulic cylinders 112 are installed at the four corners of the top of the assembly seat 11. A top plate 113 is installed at the movable end of the hydraulic cylinder 112. A locking unit is installed in the center area of ​​the top of the assembly seat 11 and the tail of the top plate 113. The locking unit includes a rotating base 12. The rotating base 12 is connected to the matching assembly seat 11 and the top plate 113. A sliding bar 13 is installed on the top of the rotating base 12 and is installed along the diameter. Two translation platforms 14 are mirror-slid in the sliding bar 13. A constraint platform 15 is installed on the two translation platforms 14. The rotating base 1 2 is provided with a linkage circular table 16 and a motor 17 rotatably connected to the linkage circular table 16 at the tail end. The linkage circular table 16 is connected to the two displacement tables 14 by power transmission, and can pull the two displacement tables 14 together to move outward and inward. The constraint table 15 is provided with a height locking piece 18, a supporting unit and a linkage control unit. The height locking piece 18 is used to constrain the metal parts and can be moved up and down and is installed inside the constraint table 15. The supporting unit is variably installed at the tail end of the height locking piece 18 to support the height locking piece 18. The linkage control unit can pull the height locking piece 18 to move up and down, and fit and separate with the traction supporting unit and the height locking piece 18.

[0041] A motor 17 is installed inside, and the motor 17 is connected to the displacement platform 14 used to pull the constraint platform 15 to move through the linkage circular table 16. The motor 17 can pull the two constraint platforms 15 to move closer together to lock the metal parts and move them away to release the metal parts, which is beneficial to locking and releasing the metal parts and facilitating operation.

[0042] A high and low locking plate 18 is installed on the restraint platform 15, and the high and low locking plate 18 can be pulled up and down by the linkage control unit. Therefore, the protrusion range of the high and low locking plate 18 can be changed according to the size of the metal parts to be inspected, thereby changing the overall variable area, and a larger area can be locked, ensuring stable locking, which is beneficial to the inspection of metal parts.

[0043] A supporting unit is provided to support the high and low locking pieces 18, thereby achieving a better locking effect, making the locking of the metal parts stable, and facilitating large-load testing of the metal parts.

[0044] The linkage control unit can pull the high and low locking plate 18 to move up and down, and can also pull the supporting unit and the high and low locking plate 18 to fit and connect and separate. That is, during the high and low displacement of the high and low locking plate 18, the supporting unit and the high and low locking plate 18 are separated, but after the high and low locking plate 18 changes, the supporting unit and the high and low locking plate 18 are fit and connected. Through such installation, the adaptability of the equipment can be made wider.

[0045] The restraint platform 15 is provided with platform layer 1 132 and platform layer 2 133 inside. The two platform layers 132 facing each other constitute the restraint area 1, and the two platform layers 2 133 facing each other constitute the restraint area 2. Thus, according to the requirements, the metal parts can be locked in the restraint area 1 and the restraint area 2, making the restraint platform 15 more widely used. The side wall of the platform layer 2 133 is provided with a height displacement cavity, and the height locking plate 18 is provided in the height displacement cavity. The restraint platform 15 is provided with an assembly chamber 134, and the linkage control unit is provided in the assembly chamber 134.

[0046] The supporting unit includes a pin-joining platform 142 installed at the same distance on the top of the constraint platform 15, a pin-joining rod 143 is installed on the pin-joining platform 142, a supporting rod 144 and a bonding piece 145 are installed on the pin-joining rod 143, the supporting rod 144 is supported on the high and low locking piece 18, the bonding piece 145 is displaced and extended into the bonding piece 145 and connected to the linkage control unit, an open hole is installed at the top of the constraint platform 15 at the displacement position of the bonding piece 145, which is used to enable the bonding piece 145 to obtain the movement area, the tail of the high and low locking piece 18 A sheet 146 is mounted to fit the support rod 144. A plurality of teeth 147 are arranged on the surface of the sheet 146 at equal distances along its length. One end of the support rod 144 is tilted to one side and supported in the teeth 147. A restraining piece 148 is mounted on the pin connection platform 142 and at the top of the support rod 144. A spiral beryllium copper wire 149 is connected between the support rod 144 and the restraining piece 148. The purpose of supporting the high and low locking piece 18 is achieved by contacting the teeth 147 with one end of the support rod 144.

[0047] During the supporting period, the support rod 144 and the tooth 147 are connected, and due to the spiral beryllium copper wire 149, one end of the support rod 144 is always in contact with the tooth 147 to ensure stability during the supporting period.

[0048] During the separation of the supporting rod 144 and the tooth 147, during the operation, the bonding piece 145 is pulled to move by the linkage operation unit, and rotated based on the pin rod 143, so that the supporting rod 144 is deflected toward the edge, and the supporting rod 144 and the tooth 147 are separated. In this way, the high and low locking piece 18 can be displaced up and down to change its position. After the position change is completed, it returns to the initial position through the spiral beryllium copper wire 149, so that the supporting rod 144 touches and supports on the tooth 147.

[0049] The linkage control unit includes a support platform 152 and a support platform 2 153 installed in the assembly room 134. The support platform 152 is screwed with a power rod 154. The power rod 154 can also rotate along the displacement of the installation direction. One end of the power rod 154 extends to the tail of the constraint platform 15 and is equipped with a countersunk hole 155, and the other end is equipped with a square hole 156. The support platform 2 153 is screwed with a power rod 2 157 that coincides with the center line of the power rod 154. A square platform 158 is installed at one end of the power rod 157, and the square platform 158 is installed in the square hole 156. A spiral beryllium copper wire 159 is connected between the square platform 158 and the inner wall of the square hole 156. The power rod 157 is installed with a rod body 1510 with reserved threads. A disc 1521 with reserved teeth that is screwed into the assembly chamber 134 and engages with the rod body 1510 is screwed. The two ends of the disc 1521 are installed with discs 1522 with reserved teeth. The tail of the tightening piece 18 is provided with a sheet body 2 1523 with a reserved tooth gap that can be engaged with the round piece 2 1522. A supporting platform 3 1524 is provided in the assembly chamber 134 and at the bottom of the pin connection platform 142. A guide rod 1525 is provided on the supporting platform 3 1524 and is extended along the power rod 154. A displacement piece 1526 is slidably provided on the guide rod 1525. A protruding ring 1527 is provided on the power rod 154. The displacement piece 1526 is provided on the fitting piece. 145 and the protruding ring 1527, and can be displaced inwardly through the power rod 154, thereby pulling the displacement plate 1526 and the bonding plate 145 to displace together through the protruding ring 1527, thereby pulling the supporting rod 144 to deflect toward the top and separate from the tooth mouth 147, and a spiral beryllium copper wire 3 1528 is connected between the guide rod 1525 and the displacement plate 1526. The spiral beryllium copper wire 3 1528 is used to keep the displacement plate 1526 and the bonding plate 145 in the separation stage at all times.

[0050] The operation process of the linkage control unit is as follows:

[0051] The tool is adapted to the countersunk hole 155 of the power rod 154, and then the power rod 154 is pulled to press and displace inward, and then the power rod 154 pulls the protruding ring 1527 to displace, and the protruding ring 1527 pulls the displacement piece 1526, and the fitting piece 145 is pulled through the displacement piece 1526, and then the supporting rod 144 is deflected toward the side and separated from the tooth 147, and then, the tool is always ensured to perform twisting during the stage of pressing inward, and through, through the cooperation of the square platform 158 and the square hole 156, the power rod 2 157 can be pulled to rotate, thereby pulling the rod body 1510 to rotate and engage with the disc 1521, and the disc 11 The rotation of 521 pulls the disc 2 1522 on both sides to rotate, and the disc 2 1522 and the upper plate 2 1523 of the high and low locking plate 18 engage with each other, thereby achieving the height displacement of the high and low locking plate 18. After the position change of the high and low locking plate 18 is completed, the tool can be removed, and the power rod 154 is driven by the spiral beryllium copper wire 2 159 to achieve the purpose of displacement toward the side and back to the initial position. In this way, the displacement plate 1526 returns to the initial position under the cause of the spiral beryllium copper wire 3 1528, and the supporting rod 144 and the bonding plate 145 return to the initial position under the cause of the spiral beryllium copper wire 1 149, and the supporting rod 144 is supported and connected to the tooth mouth 147.

[0052] A base platform 162 is installed at the bottom of the rotating base 12, and a penetrating assembly chamber 2 163 is installed at the center line of the base platform 162, and the motor 17 is installed in the assembly chamber 2 163; the base platform 162 can be fixedly connected to a power device that can rotate and is installed on the assembly seat 11 to pull the rotating base 12 to rotate together, and the motor 17 is installed in the assembly chamber 2 163 of the base platform 162, so that the equipment can be more concentrated and the volume can be reduced.

[0053] A thread X172 is installed on the top of the linkage circular table 16, and the thread X172 extends into the sliding bar 13. The tail of the displacement table 14 is provided with an engaging tooth X173 that can be connected with the thread X172 by thread. Through the cooperation of several engaging teeth X173 and thread X172, the range of mechanical linkage can be expanded, thereby making the linkage more stable and allowing the displacement of the displacement table 14 and the matching constraint table 15 to be stable.

[0054] A recessed chamber 174 is provided at the tail of the linkage table 16, and a ring body 175 with a reserved inner ring gap and a center line with the linkage table 16 is provided on the side of the recessed chamber 174. A disc X176 with a reserved inner ring gap is provided on the power end of the motor 17. The disc X176 is linked to the ring body 175 through multiple discs Y177 with reserved inner ring gaps. Three discs Y177 are arranged in a circle at the same distance. During operation, the motor 17 pulls the disc X176 to rotate, and then the disc Y177 and the ring body 175 are linked to achieve the rotation of the linkage table 16.

[0055] Because the thread X172 needs to be extended into the sliding bar 13 to cooperate with the engaging tooth X173 at the tail of the translation platform 14, a penetrating drop hole is installed at the tail of the sliding bar 13. Metal debris generated during the inspection can fall through the drop hole. Since it is inconvenient to clean and hinders the connection between the thread X172 and the engaging tooth X173, a length-variable barrier unit is installed between the two translation platforms 14 and in the sliding bar 13.

[0056] The length-variable barrier unit includes a plurality of barrier pieces 182 arranged in sequence. A connecting plate 183 inclined toward the tail is installed on the top of the barrier piece 182. A connecting plate 2 184 extending 90 degrees toward the top is installed on one side of the connecting plate 183 facing each other. When two barrier pieces 182 are close to each other in height, the connecting plate 183 of the higher barrier piece 182 is slidably installed on the top of the lower barrier piece 182, and the connecting plate 2 184 of the lower barrier piece 182 is slidably installed on the upper barrier piece 182. 2, sliding plates 185 are installed on both sides of each barrier 182, and supporting substrates 186 are installed on both sides of the top of the sliding bar 13 and extended in the direction of its installation. A plurality of sliding grooves 187 arranged in different heights and having gaps are installed inside the two supporting substrates 186. The sliding plates 185 on both sides of each barrier 182 are adapted to slide in the sliding grooves 187. The barriers 182 at the top and tail ends of the length-variable barrier unit are fixedly connected to the two displacement platforms 14.

[0057] A plurality of connecting plates 184 are used to constrain the sliding of the adapted blocking plate 182, and through the cooperation of connecting plate 1 183 and connecting plate 2 184, the length change of the two blocking plates 182 close to each other is achieved, and they can also pull each other to move, thereby preventing metal debris generated during detection from falling into the thread X172, ensuring smooth operation.

[0058] Since the above adaptation is for square and polyhedron metal parts, the rod-shaped metal parts are not firmly locked only through two restraining platforms 15, so two connecting plates 2 184 are added;

[0059] Two sliding bars 192 are installed on the top of the rotating base 12. The two sliding bars 192 are respectively installed on both sides of the sliding bar 13, and are installed at a ninety-degree angle with respect to the sliding bar 13. A displacement platform 193 is slidingly installed in the sliding bar 192, and a constraint platform 194 is installed on the displacement platform 193. A linkage unit is connected between the constraint platform 194 and the two constraint platforms 15. The linkage unit is used to pull the constraint platform 194 so that it can be displaced together with the two constraint platforms 15.

[0060] The two first constraint platforms 15 and the two second constraint platforms 194 are arranged in a circle at the same interval and can be moved inward or to the edge together, thereby locking the rod-shaped and polyhedral metal parts.

[0061] The linkage unit includes an extension piece 2 1202 installed on both sides of the constraint platform 2 194. The two extension pieces 2 1202 are mirror-mounted around the sliding bar 2 192. A guide hole 1203 is installed on the extension piece 2 1202. An extension piece 1204 is installed on the constraint platform 1 15. A connecting guide rod 1205 is installed on the extension piece 1204. The connecting guide rod 1205 is installed in the guide hole 1203. A accommodating hole 1206 for providing a path for the extension piece 2 1202 is installed on the side of the constraint platform 1 15.

[0062] During the period when the constraint platform 15 pulls the connecting guide rod 1205 to move, the connecting guide rod 1205 cooperates with the guide hole 1203 to pull the constraint platform 2 194 to move with the same span as the constraint platform 15 in the sliding bar 2 192.

[0063] The connecting guide rod 1205 includes a rod body 1207 and thread segments 1208 installed at both ends of the rod body 1207. A through hole 1209 is installed on the extension piece 1204. The connecting guide rod 1205 is inserted into the through hole 1209 and the guide hole 1203, so that the rod body 1207 is in the through hole 1209 and the guide hole 1203, and the thread tube 12010 is threadedly connected to the thread segments 1208 at both ends of the connecting guide rod 1205.

[0064] During the assembly of the constraint platform 2 194, slide the displacement platform 2 193 at the tail of the constraint platform 2 194 into the sliding bar 2 192, then make the guide hole 1203 on the extension piece 2 1202 and the through hole 1209 of the extension piece 1 1204 in a straight line, and then make the connecting guide rod 1205 pass through in sequence, and then screw the thread sections 1208 at both ends of the connecting guide rod 1205 into the thread tube 12010 to connect the constraint platform 15 and the constraint platform 2 194.

[0065] The second constraint platform 194 is assembled when needed and can be removed when not in use, making it easy to use and convenient to operate. In addition, the second displacement platform 193 and the linkage circular platform 16 are not connected, so the second sliding bar 192 does not need to be installed through it, which can prevent metal chips from falling into the linkage circular platform 16 during inspection.

[0066] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A testing machine for fatigue detection of metal materials, comprising an assembly seat (11), characterized in that: The four corners of the top of the assembly seat (11) are all equipped with hydraulic cylinders (112), and the movable end of the hydraulic cylinder (112) is equipped with a top plate (113). The top center area of ​​the assembly seat (11) and the tail of the top plate (113) are equipped with locking units. The locking unit includes a rotating base (12), and a sliding bar (13) installed along the diameter is installed on the top of the rotating base (12). Two displacement platforms (14) are mirror-slid in the sliding bar (13). The two displacement platforms (14) are equipped with a constraint platform (15). The tail of the rotating base (12) is equipped with a linkage table (16) and a motor (110) connected to the linkage table (16). 7), the linkage circular table (16) and the two displacement tables (14) are connected by power transmission, and can pull the two displacement tables (14) together to move outward and inward. The constraint table (15) is provided with a high and low locking piece (18), a supporting unit and a linkage control unit. The high and low locking piece (18) is used to constrain the metal parts and can be moved up and down and is installed inside the constraint table (15). The supporting unit is variably installed at the tail of the high and low locking piece (18) to support the high and low locking piece (18). The linkage control unit can pull the high and low locking piece (18) together to move up and down, and fit and connect with and separate the pulling supporting unit and the high and low locking piece (18); The restraint platform 1 (15) is provided with a platform layer 1 (132) and a platform layer 2 (133) inside, the side wall of the platform layer 2 (133) is provided with a height displacement cavity, the height displacement of the height locking piece (18) is provided in the height displacement cavity, the restraint platform 1 (15) is provided with an assembly chamber 1 (134), and the linkage control unit is provided in the assembly chamber 1 (134); The supporting unit comprises a pin-joining platform (142) installed at the same distance on the top of the constraint platform (15), a pin-joining rod (143) is installed on the pin-joining platform (142), a supporting rod (144) and a fitting piece (145) are installed on the pin-joining rod (143), the supporting rod (144) is supported on the high and low locking piece (18), the fitting piece (145) is displaced and extended into the fitting piece (145) and connected to the linkage control unit, and the tail of the high and low locking piece (18) is installed A sheet (146) is mounted to fit the support rod (144), a plurality of teeth (147) are mounted on the surface wall of the sheet (146) at equal distances along the length direction, one end of the support rod (144) is tilted toward one side and supported in the teeth (147), a constraint sheet (148) is mounted on the pin connection platform (142) and at the top of the support rod (144), and a spiral beryllium copper wire (149) is connected between the support rod (144) and the constraint sheet (148); The linkage control unit includes a support platform 1 (152) and a support platform 2 (153) installed in an assembly chamber 1 (134). The support platform 1 (152) is screwed with a power rod 1 (154). The power rod 1 (154) can also rotate along the displacement direction of the installation. One end of the power rod 1 (154) extends to the tail of the constraint platform 1 (15) and is provided with a countersunk hole (155), and the other end is provided with a square hole (156). The support platform 2 (153) is screwed with a power rod 2 (154) whose center line coincides with the center line of the power rod 1 (154). 57), a square platform (158) is installed at one end of the power rod (157), the square platform (158) is installed in the square hole (156), and a spiral beryllium copper wire (159) is connected between the square platform (158) and the inner wall of the square hole (156). The power rod (157) is installed with a rod body (1510), and a disc (1521) that is screwed and engaged with the rod body (1510) is screwed in the assembly chamber (134). The two ends of the disc (1521) are installed with discs (1522). The high and low locking pieces ( 18) is provided with a sheet body 2 (1523) which can be engaged with the round sheet 2 (1522) at the tail end thereof, a support platform 3 (1524) is provided in the assembly chamber 1 (134) and at the bottom of the pin connection platform (142), a guide rod (1525) which is arranged to expand along the power rod 1 (154) is provided on the support platform 3 (1524), a displacement sheet (1526) is slidably provided on the guide rod (1525), a protruding ring (1527) is provided on the power rod 1 (154), and the displacement sheet (1526) is provided on the fitting sheet ( 145) and the protruding ring (1527), and can be displaced inwardly through the power rod (154), thereby pulling the displacement plate (1526) and the bonding plate (145) to displace together through the protruding ring (1527), thereby pulling the supporting rod (144) to deflect toward the top and separate from the tooth mouth (147), and the spiral beryllium copper wire three (1528) is connected between the guide rod (1525) and the displacement plate (1526), ​​and the spiral beryllium copper wire three (1528) is used to keep the displacement plate (1526) and the bonding plate (145) in the separation stage.

2. A metal material fatigue testing machine according to claim 1, characterized in that: A base platform (162) is installed at the bottom of the rotating base (12), and a penetrating assembly chamber 2 (163) is installed at the center line of the base platform (162), and the motor (17) is installed in the assembly chamber 2 (163).

3. A metal material fatigue testing machine according to claim 2, characterized in that: The top of the linkage truncated table (16) is provided with a threaded tooth X (172), and the threaded tooth X (172) extends into the sliding bar (13). The tail of the displacement table (14) is provided with an engaging tooth X (173) that can be threadedly connected to the threaded tooth X (172). The tail of the linkage truncated table (16) is provided with a recessed chamber (174), and the side of the recessed chamber (174) is provided with a ring body (175) that is on the same center line as the linkage truncated table (16). A disc X (176) is provided on the power end of the motor (17), and the disc X (176) is linked to the ring body (175) via a plurality of discs Y (177).

4. A metal material fatigue testing machine according to claim 3, characterized in that: A length-variable barrier unit is installed between the two displacement platforms (14) and in the sliding bar (13). The length-variable barrier unit includes a plurality of barrier pieces (182) installed in sequence. A connecting plate (183) inclined toward the tail is installed on the top of the barrier piece (182). A connecting plate (184) extending 90 degrees toward the top is installed on one side of the connecting plate (183) facing each other. The two barrier pieces (182) close to each other in height, the connecting plate (183) of the higher barrier piece (182) is slidably installed on the top of the lower barrier piece (182). The connecting plate (183) of the lower barrier piece (182) is installed on the top of the lower barrier piece (182). Plate 2 (184) is slidingly installed on the tail wall of the high barrier (182), and sliding plates (185) are installed on both sides of each barrier (182). Supporting substrates (186) are installed on both sides of the top of the sliding bar (13) and are extended along the installation direction. A plurality of sliding grooves (187) arranged in different heights and having gaps are installed inside the two supporting substrates (186). The sliding plates (185) on both sides of each barrier (182) are slidingly installed in the sliding grooves (187). The barriers (182) at the top and tail ends of the length-variable barrier unit are fixedly connected to the two displacement platforms (14).

5. The metal material fatigue testing machine according to claim 4, characterized in that: Two sliding bars (192) are installed on the top of the rotating base (12). The two sliding bars (192) are respectively installed on both sides of the sliding bar (13) and are installed at a 90-degree angle with respect to the sliding bar (13). A displacement platform (193) is slidingly installed in the sliding bar (192). A constraint platform (194) is installed on the displacement platform (193). A linkage unit is connected between the constraint platform (194) and the two constraint platforms (15). The linkage unit is used to pull the constraint platform (194) so ​​that it can be displaced together with the two constraint platforms (15).

6. A metal material fatigue testing machine according to claim 5, characterized in that: The linkage unit includes an extension piece 2 (1202) installed on both sides of the constraint platform 2 (194), the two extension pieces 2 (1202) are mirror-mounted around the sliding bar 2 (192), a guide hole (1203) is installed on the extension piece 2 (1202), the constraint platform 1 (15) is installed on the extension piece 1 (1204), and a connecting guide rod (1205) is installed on the extension piece 1 (1204), and the connecting guide rod (1205) is installed in the guide hole (1203). The side of the constraint platform 1 (15) is provided with a receiving hole (1206) for providing a path for the extension piece 2 (1202).

7. A metal material fatigue testing machine according to claim 6, characterized in that: The connecting guide rod (1205) includes a rod body (1207) and threaded sections (1208) installed at both ends of the rod body (1207); a through hole (1209) is installed on the extension piece (1204); the connecting guide rod (1205) is inserted into the through hole (1209) and the guide hole (1203), so that the rod body (1207) is located in the through hole (1209) and the guide hole (1203); and the threaded sections (1208) at both ends of the connecting guide rod (1205) are threadedly connected to the threaded tubes (12010).

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