A clamping device for high temperature fatigue testing machine of metal materials

Abstract

The present invention relates to the field of fatigue test detection technology, specifically to a clamping device for detecting a high-temperature fatigue testing machine for metal materials, comprising a bottom box, a lifting rod and a plate frame arranged on the lifting rod, an upper clamping member arranged on the plate frame, and a lower clamping member arranged on the bottom box; the upper clamping member comprises a shell and a conical groove arranged in the shell, clamping blocks are arranged in pairs in the conical groove, side grooves are arranged on the sides of the clamping blocks, side rods are passed through the side grooves, and pull grooves are arranged on the clamping blocks, and adjustment plates are arranged in the pull grooves; the present invention can use a hydraulic structure to first control the side rods to clamp and straighten the sides of the sample workpiece to keep the sample workpiece vertical, and then use the clamping blocks to tighten and clamp it, so as to facilitate clamping by the lower clamping member.

Description

Technical Field

[0001] The invention belongs to the technical field of fatigue test detection, and in particular relates to a clamping device for detecting a metal material high-temperature fatigue testing machine. Background Art

[0002] During the service life of materials, most materials break not because of insufficient tensile or impact performance, but mainly because of continuous fatigue load during service. Therefore, most materials must first be tested for fatigue performance before use; the clamping method of existing fatigue testing machines is to first fix one end of a sample workpiece, and then fix the other end after adjusting the height. There are defects in this process: it is difficult to ensure that the workpiece is vertical when one end is fixed, and the workpiece is easily tilted under pressure during the clamping process, and it needs to be loosened and retried to make it vertical, and the tilt of the workpiece will make it difficult to fully clamp the other end, affecting the detection process. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the following technical problems in the prior art: after clamping at one end, the existing clamping structure is difficult to ensure that the clamping position of the other end is appropriate and it is difficult to fully clamp.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A clamping device for detecting a metal material high-temperature fatigue testing machine, comprising a bottom box, a lifting rod and a plate frame arranged on the lifting rod, an upper clamping member arranged on the plate frame, and a lower clamping member arranged on the bottom box; the upper clamping member comprises a shell and a conical groove arranged in the shell, clamping blocks are arranged in pairs in the conical groove, side grooves are arranged on the sides of the clamping block, side rods are passed through the side grooves, a pull groove is arranged on the clamping block, and an adjustment plate is arranged in the pull groove.

[0006] As an optimal technical solution for a clamping device for high-temperature fatigue testing machine for metal materials, a guide strip is provided on one side of the clamping block, a guide groove is provided on the side wall of the cone groove, and the guide strip is embedded in the guide groove.

[0007] As an optimal technical solution for a clamping device for high-temperature fatigue testing machines for metal materials, a transverse groove is provided at the bottom of the side groove, a clamping piece is provided in the transverse groove, the clamping piece includes a first clamping plate and a second clamping plate, and the side rod is provided between the first clamping plate and the second clamping plate.

[0008] As an optimal technical solution for a clamping device for high-temperature fatigue testing machines for metal materials, the first clamping plate and one end of the second clamping plate are connected by a connecting plate, a connecting rod is provided at the end of the side rod, and a first spring is provided at the end of the connecting rod to connect with the connecting plate.

[0009] As a preferred technical solution for a clamping device for high-temperature fatigue testing machines for metal materials, a first push rod is provided on one side of the clamping member, the first push rod is connected to a propulsion cylinder, and the propulsion cylinder is fixed in a housing.

[0010] As an optimal technical solution for a clamping device for high-temperature fatigue testing machines for metal materials, a top groove is provided in the shell and communicates with the cone groove, a transfer block is provided in the top groove, and an intermediate groove is provided on the transfer block.

[0011] As an optimal technical solution for a clamping device for detecting a metal material high-temperature fatigue testing machine, an inlet groove is provided on the transfer block, and the inlet groove is connected to one end of the middle groove through a first through groove. A side through groove is also provided on the side of the transfer block and connected to one end of the middle groove; the inlet groove is also connected to the other end of the middle groove through a second through groove.

[0012] As an optimal technical solution for a clamping device for high-temperature fatigue testing machine for metal materials, the thrust cylinder is connected to the side through groove through a connecting pipe.

[0013] The transfer block is also provided with a propulsion groove, which is connected with the middle groove through a third through groove.

[0014] As an optimal technical solution for a clamping device for high-temperature fatigue testing machine for metal materials, a piston block is also provided in the middle groove, and a second spring is provided at one end of the piston block to connect with the side wall of the middle groove.

[0015] As an optimal technical solution for a clamping device for high-temperature fatigue testing machines for metal materials, a piston plate is provided in the thrust groove, a piston rod is connected below the piston plate, and the piston rod is connected to an adjustment plate.

[0016] Beneficial effects of the present invention: The present invention can firstly control the side rod to clamp and straighten the side of the sample workpiece through the hydraulic structure, so that the sample workpiece is kept vertical, and then use the clamping block to tighten the clamping to facilitate the clamping of the lower clamping member. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a schematic diagram of the cross-sectional structure of the upper clamping member in the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the clamping member in the transverse groove of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the clamping block in the present invention;

[0022] Figure 5 It is a schematic diagram of the connection structure between the clamping member and the side rod in the present invention;

[0023] Figure 6 It is a structural schematic diagram of the connecting pipe in the present invention;

[0024] Figure 7 It is a schematic diagram of the connection structure between the inlet groove and the side through groove in the present invention;

[0025] Figure 8 It is a schematic diagram of the connecting structure between the inlet groove and the propulsion groove in the present invention.

[0026] Reference numerals: bottom box 100, lifting rod 101, plate frame 102, lower clamping member 103, upper clamping member 200, side groove 203b, pull groove 203d, clamping block 203, guide strip 203a, guide groove 202a, transverse groove 203g, first clamping plate 204a, second clamping plate 204b, side rod 203c, connecting rod 203f, first spring 203h, connecting plate 204c, clamping member 204, first push rod 204d, shell Body 201, conical groove 202, top groove 201a, first through groove 205c, inlet groove 205b, second through groove 205e, thrust cylinder 204e, connecting pipe 204f, side through groove 205d, transfer block 205, third through groove 205j, piston block 206, second spring 206a, middle groove 205a, thrust groove 205f, piston plate 205g, piston rod 205h, adjustment plate 203e, one-way valve groove 205k. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0031] Reference Figure 1 The present embodiment provides a clamping device for high temperature fatigue testing machine of metal materials, comprising a bottom box 100, a lifting rod 101 is arranged on the bottom box 100, a plate frame 102 arranged on the lifting rod 101, an upper clamping member 200 is arranged on the plate frame 102, and a lower clamping member 103 is arranged on the bottom box 100;

[0032] Further, see Figure 2 The upper clamping member 200 includes a shell 201 and a conical groove 202 arranged in the shell 201, clamping blocks 203 are arranged in pairs in the conical groove 202, side grooves 203b are arranged on the sides of the clamping blocks 203, side rods 203c are passed through the side grooves 203b, and a pull groove 203d is arranged on the clamping block 203, and an adjustment plate 203e is arranged in the pull groove 203d.

[0033] Specifically, the lower clamping member 103 is an existing clamping mechanism and will not be described or shown in detail; the upper clamping member 200 can correct the sample workpiece to keep the sample workpiece vertical, so that the sample workpiece can be accurately clamped by the lower clamping member 103.

[0034] The conical groove 202 is a frustum-shaped groove structure, the lower end of the conical groove 202 is the bottom opening of the shell 201, the upper end of the conical groove 202 is larger than the lower end, and the side wall is contracted from top to bottom.

[0035] The outer side surface of the clamping block 203 is inclined and fits with the side wall of the cone groove 202, and the inner side surface of the clamping block 203 is vertical. The two clamping blocks 203 are arranged opposite to each other to form a clamping structure.

[0036] There are two side rods 203c disposed at the top and bottom for initially clamping and straightening the two sides of the sample workpiece. The side grooves 203b are tilted, specifically, they are higher near the two ends of the clamping block 203 and lower near the middle, to prevent the side rods 203c from deflecting in the horizontal direction.

[0037] The drawing groove 203d is a transversely arranged groove structure, and the adjustment plate 203e is connected to the hydraulic rod (piston rod 205h). By controlling the lifting of the adjustment plate 203e, the two clamping blocks 203 are driven to lift and lower along the side wall of the conical groove 202. When the clamping blocks 203 descend, they move closer to each other to clamp the sample workpiece.

[0038] Furthermore, a guide strip 203a is provided on one side of the clamping block 203, and a guide groove 202a is provided on the side wall of the cone groove 202, and the guide strip 203a is embedded in the guide groove 202a.

[0039] The guide strip 203a and the guide groove 202a are T-shaped in cross section and are treated with wear-resistant lubrication, which will not be described in detail.

[0040] Reference Figure 3 , a transverse groove 203g is provided at the bottom of the side groove 203b, a clamping member 204 is provided in the transverse groove 203g, the clamping member 204 includes a first clamping plate 204a and a second clamping plate 204b, and a side rod 203c is provided between the first clamping plate 204a and the second clamping plate 204b; Figure 4 The first clamping plate 204a and the second clamping plate 204b are connected at one end by a connecting plate 204c, a connecting rod 203f is provided at the end of the side rod 203c, and a first spring 203h is provided at the end of the connecting rod 203f and connected to the connecting plate 204c.

[0041] Specifically, both ends of the two side rods 203 c are connected by a connecting rod 203 f and both ends are provided with a first spring 203 h . The two first springs 203 h are used to maintain the side rods 203 c at the middle position of the two clamping blocks 203 .

[0042] Reference Figure 5 A first push rod 204 d is provided on one side of the clamping member 204 . The first push rod 204 d is connected to a push cylinder 204 e , and the push cylinder 204 e is fixed in the housing 201 .

[0043] It should be noted that the propulsion cylinder 204e is fixed to one end of the transverse groove 203g, and the propulsion cylinder 204e is fixed to the side wall of the transverse groove 203g through a T-shaped vertical rail, so that the propulsion cylinder 204e can be adaptively raised and lowered without falling.

[0044] When the clamping member 204 is pushed to move in the transverse groove 203g, the side rods 203c move synchronously; and it should be noted that two groups of side rods 203c are provided, and when they move close to each other, they clamp and straighten the two sides of the workpiece.

[0045] The housing 201 is provided with a top groove 201 a communicating with the cone groove 202 , the top groove 201 a is provided with a transfer block 205 , and the transfer block 205 is provided with a middle groove 205 a .

[0046] Reference Figure 7 The transfer block 205 is provided with an inlet groove 205b, which is connected to one end of the middle groove 205a through a first through groove 205c. A side through groove 205d is also provided on the side of the transfer block 205 and connected to one end of the middle groove 205a; the inlet groove 205b is also connected to the other end of the middle groove 205a through a second through groove 205e.

[0047] A groove structure is provided in the shell 201, and the connecting pipe 204f is arranged in the groove structure, and the connecting pipe 204f is placed in a bent position to leave a movable margin to move up and down with the thrust cylinder 204e, and the remaining part of the connecting pipe 204f is fixed, and can be constrained and fixed by the groove structure, and can also be constrained and fixed by the snap structure.

[0048] The thrust cylinder 204e is connected to the side through groove 205d through the connecting pipe 204f.

[0049] The transfer block 205 is also provided with a push groove 205f, which is connected to the middle groove 205a through the third through groove 205j.

[0050] The pushing groove 205f is connected to one end of the middle groove 205a provided with the side through groove 205d through the one-way valve groove 205k, so as to release the clamping state.

[0051] Reference Figure 8 A piston block 206 is also provided in the middle groove 205a, and a second spring 206a is provided at one end of the piston block 206 and connected to the side wall of the middle groove 205a; a piston plate 205g is provided in the thrust groove 205f, and a piston rod 205h is connected to the lower part of the piston plate 205g, and the piston rod 205h is connected to the adjusting plate 203e.

[0052] It should be noted that, in the initial state, the inlet groove 205b is connected to the side groove 205d, and the piston block 206 is blocked at the third groove 205j. When the clamping work starts, the sample workpiece is placed in the middle of the clamping block 203, and the hydraulic drive switch is turned on. The hydraulic pump drives the hydraulic oil to enter from the inlet groove 205b, and through the side groove 205d, drives the clamping member 204 and the side rod 203c to move to clamp and straighten the side of the sample workpiece. After the side is clamped in place, the hydraulic oil pushes the piston block 206 from the second groove 205e. The piston block 206 squeezes the second spring 206a, and the piston block 206 blocks the first through groove 205c and connects the second through groove 205e and the third through groove 205j. The hydraulic oil further pushes the piston plate 205g, the adjusting plate 203e and the clamping block 203 to move downward to fix the workpiece. After the clamping is in place and the internal hydraulic pressure of the transfer block 205 is stable, the second spring 206a pushes the piston block 206 back to maintain the clamping. Then the workpiece is lowered and the lower clamping piece is used to clamp the other end.

[0053] Furthermore, during contact clamping, the hydraulic pump draws back the hydraulic oil, and the side rods 203c move back to both sides, while the piston plate 205g rises and drives the clamping block 203 to rise for contact clamping.

[0054] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A clamping device for high temperature fatigue testing machine of metal materials, characterized in that: include, A bottom box (100), wherein the bottom box (100) is provided with a lifting rod (101), a plate frame (102) provided on the lifting rod (101), an upper clamping member (200) is provided on the plate frame (102), and a lower clamping member (103) is provided on the bottom box (100); The upper clamping member (200) comprises a shell (201) and a conical groove (202) arranged in the shell (201); clamping blocks (203) are arranged in pairs in the conical groove (202); side grooves (203b) are arranged on the sides of the clamping blocks (203); side rods (203c) are passed through the side grooves (203b); a pull groove (203d) is arranged on the clamping block (203); and an adjustment plate (203e) is arranged in the pull groove (203d); A guide strip (203a) is provided on one side of the clamping block (203), a guide groove (202a) is provided on the side wall of the cone groove (202), and the guide strip (203a) is embedded in the guide groove (202a); A transverse groove (203g) is provided at the bottom of the side groove (203b), a clamping member (204) is provided in the transverse groove (203g), the clamping member (204) comprises a first clamping plate (204a) and a second clamping plate (204b), and the side rod (203c) is provided between the first clamping plate (204a) and the second clamping plate (204b); One end of the first clamping plate (204a) and the second clamping plate (204b) are connected via a connecting plate (204c); a connecting rod (203f) is provided at the end of the side rod (203c); and a first spring (203h) is provided at the end of the connecting rod (203f) and is connected to the connecting plate (204c); A first push rod (204d) is provided on one side of the clamping member (204), the first push rod (204d) is connected to a propulsion cylinder (204e), and the propulsion cylinder (204e) is fixed in the housing (201); The housing (201) is provided with a top groove (201a) which is in communication with the cone groove (202); a transfer block (205) is provided in the top groove (201a); and a middle groove (205a) is provided on the transfer block (205); The transfer block (205) is provided with an inlet groove (205b), the inlet groove (205b) being connected to one end of the middle groove (205a) via a first through groove (205c), and a side through groove (205d) being connected to one end of the middle groove (205a) is also provided on the side of the transfer block (205); the inlet groove (205b) is also connected to the other end of the middle groove (205a) via a second through groove (205e); The propulsion cylinder (204e) is connected to the side through groove (205d) via a connecting pipe (204f); The transfer block (205) is also provided with a propulsion groove (205f), the propulsion groove (205f) being connected to the middle groove (205a) via a third through groove (205j); the propulsion groove (205f) is connected to one end of the middle groove (205a) provided with a side through groove (205d) via a one-way valve groove (205k); A piston block (206) is also provided in the middle groove (205a); a second spring (206a) is provided at one end of the piston block (206) and is connected to the side wall of the middle groove (205a); A piston plate (205g) is provided in the propulsion groove (205f), a piston rod (205h) is connected below the piston plate (205g), and the piston rod (205h) is connected to the adjustment plate (203e).

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