A clamping device for detecting seamless steel pipes for automobiles with precise adjustment function

Abstract

The present invention relates to the technical field related to automobile seamless steel pipes, and discloses a clamping device for detecting automobile seamless steel pipes with a precise adjustment function, comprising a bottom plate, a U-shaped frame is fixedly provided on the upper side of the bottom plate, an electric telescopic rod is fixedly provided on the upper side of the U-shaped frame, a Rockwell hardness tester is fixedly provided on the extended end of the electric telescopic rod, two frames are respectively provided on the upper sides of both ends of the bottom plate, and two clamping assemblies are respectively provided on the two frames; the present invention can control the distance that the guide block moves by the annular sliding of the annular member, so as to control a plurality of arc blocks and rubber blocks to quickly clamp and fix seamless steel pipes of different diameters; and then adjust the clamping force of the clamping assembly on the seamless steel pipe by cooperating with the inner side of the guide block in a bell-shaped curve structure with low ends and high middle, so that neither slipping will occur due to insufficient clamping force nor indentations will be left on the surface of the seamless steel pipe due to excessive clamping force.

Description

Technical Field

[0001] The present invention belongs to the technical field related to automobile seamless steel pipes, and more specifically, particularly relates to a clamping device for detecting automobile seamless steel pipes with a precise adjustment function. Background Art

[0002] Automobile seamless steel pipes are made by punching a whole round steel bar. There are no welds on the surface of the steel pipe, which is called seamless steel pipe. According to the production method, automobile seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, jacking pipes, etc. During the production process and before use of automobile seamless steel pipes, batches of steel pipe specimens will be randomly selected for tensile testing to verify whether the steel pipes meet the standards. During the experiment, an automated clamping device is required to clamp and position the automobile seamless steel pipe specimens to be tested. However, the clamping device for automobile seamless steel pipe testing in the prior art has the following defects:

[0003] In the prior art, when the clamping device for automobile seamless steel pipe detection performs hardness testing on automobile seamless steel pipes of different diameters, it is necessary to replace and use a plurality of clamping components of different specifications on the clamping device for automobile seamless steel pipe detection to clamp and fix automobile seamless steel pipes of different diameters respectively. When the clamping device cannot be flexibly adjusted according to automobile seamless steel pipes of different diameters, it is inconvenient for the staff to operate and use, and the flexibility of the device is reduced to a certain extent.

[0004] In the prior art, when the clamping device for automobile seamless steel pipe testing performs hardness testing on the automobile seamless steel pipe, due to insufficient clamping force, displacement is likely to occur during the testing process of the automobile seamless steel pipe, thereby affecting the effect of the hardness testing of the automobile seamless steel pipe; and when the clamping force is excessive, it is easy to leave an indentation on the automobile seamless steel pipe, affecting the surface quality after the test, resulting in the problem of waste of workpieces;

[0005] In the prior art, the clamping device for automobile seamless steel pipe testing has no limiting fixing structure after clamping and fixing the automobile seamless steel pipe, which causes the clamping assembly to loosen easily during the hardness test of the automobile seamless steel pipe, thereby affecting the hardness test of the automobile seamless steel pipe.

[0006] Therefore, in view of this, the existing structure and defects are studied and improved, and a clamping device for automobile seamless steel pipe inspection with precise adjustment function is provided, in order to achieve a more practical and valuable purpose. Summary of the invention

[0007] The present invention provides a clamping device for detecting seamless steel pipes for automobiles with a precise adjustment function, which is used to overcome the above-mentioned defects in the prior art.

[0008] The purpose and effect of the clamping device for detecting seamless steel pipes for automobiles with precise adjustment function of the present invention are achieved by the following specific technical means:

[0009] A clamping device for detecting seamless steel pipes for automobiles with a precise adjustment function comprises a bottom plate, a U-shaped frame is fixedly provided on the upper side of the bottom plate, an electric telescopic rod is fixedly provided on the upper side of the U-shaped frame, a Rockwell hardness tester is fixedly provided on the extended end of the electric telescopic rod, two first through holes are respectively provided on both sides of the U-shaped frame, two frames are respectively provided on the upper sides of the two ends of the bottom plate, and two clamping assemblies are respectively provided on the two frames; the clamping assembly comprises a shell, the shell is fixed on the upper side of the frame, a round shell is fixedly provided inside the frame, a second through hole is provided in the middle of the round shell, and an inner wall of the round shell A plurality of push blocks are slidably provided in the upper circular array, an arc block is fixedly provided on the inner side of each push block, a rubber block is provided on the inner side of the arc block, a top block is provided on the outer side of the push block, a pair of first fixed plates are fixedly provided in the upper circular array on the inner side of the circular shell, two second fixed plates are fixedly provided on both sides of each top block, two first hollow parts are connected between every two first fixed plates and two second fixed plates, an annular part is slidably provided in the inner ring of the circular shell, a plurality of guide blocks are fixedly provided in the inner circular array of the annular part, and the outer side of each top block is in sliding contact with the inner side of the guide block.

[0010] According to a further technical solution, the inner side of each guide block is in a bell-shaped curve structure with low ends and a high middle, and a plurality of limit grooves are arranged on the inner side of each guide block.

[0011] A further technical solution is that a push rod is fixedly provided on the inner side of the top block, a pressure plate is fixedly provided on one end of the push rod, a slide groove is provided inside the push block, the pressure plate slides inside the slide groove, a second hollow piece is connected to the inside of the slide groove on one side of each pressure plate, a third hollow piece is connected between the inner side of each arc block and the outer side of the rubber block, and a connecting channel is provided to interconnect the inside of each second hollow piece and the inside of the third hollow piece.

[0012] According to a further technical solution, two elastic plates are fixedly provided on the sides of each two of the first hollow members close to each other, a plurality of clamping blocks are fixedly provided at intervals on the sides of the two elastic plates close to each other, and a plurality of clamping grooves are provided at intervals on both sides of each push block.

[0013] According to a further technical solution, the upper side of each of the card slots contacts the upper plane of the card block, and the lower side of each of the card slots contacts the lower inclined surface of the card block.

[0014] According to a further technical solution, a T-shaped slider is fixedly provided on the upper end of each elastic plate, and each T-shaped slider slides horizontally inside the first fixed plate.

[0015] A further technical solution is that an opening is provided on the upper side of the circular shell, a plurality of first tooth blocks are fixedly provided at intervals on the upper side of the annular member, the plurality of first tooth blocks are all located inside the opening, a moving block is horizontally slidably provided on the upper side of the interior of the shell, a plurality of second tooth blocks are fixedly provided on the lower side of the moving block, and the plurality of first tooth blocks are meshed with the plurality of second tooth blocks.

[0016] According to a further technical solution, a stepper motor is fixedly provided on one side of the shell, a lead screw is fixedly provided on an output end of the stepper motor, and an outer side of the lead screw contacts with an internal thread of the moving block.

[0017] According to a further technical solution, a movable plate is vertically slidably provided on the inner upper side of the shell, a plurality of springs are connected between the upper side of the movable plate and the inner upper side of the shell, a plurality of elastic protrusions are fixedly provided on the lower side of the movable plate, and the lower side of each elastic protrusion is in extrusion and friction contact with the upper side of the movable block.

[0018] According to a further technical solution, a plurality of grooves are provided on the upper side of the moving block, and the outer side of each elastic protrusion is in sliding contact with the inner side of the groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The clamping device for detecting seamless steel pipes for automobiles of the present invention with precise adjustment function is provided with annular parts, guide blocks, top blocks, push blocks, arc blocks, and rubber blocks. The circular shell annular sliding drives the guide blocks to move. The inner side of the guide blocks slides and contacts with the outer side of the top blocks. The inner side of the guide blocks is in a bell-shaped curve structure with low ends and high middle. Therefore, the guide blocks move to squeeze the top blocks to move radially inward. The radial inward movement of the top blocks drives the push blocks, arc blocks, and rubber blocks to move radially inward. Thus, the outer side of the seamless steel pipe is clamped and fixed by the radial inward movement of a plurality of arc blocks and rubber blocks. This allows the plurality of arc blocks and rubber blocks to quickly clamp and fix seamless steel pipes of different diameters by controlling the distance that the annular sliding of the annular parts drives the guide blocks to move. Then, through the provision of the push rod, the pressing plate, the second hollow part, the third hollow part, and the connecting channel, the radial inward movement of the top block drives the push rod and the pressing plate to move radially inward. The pressing plate slides in the slide groove to squeeze and deform the second hollow part. The second hollow part generates elastic force by squeezing. The second hollow piece is squeezed and deformed, so that the solution in the second hollow piece enters the third hollow piece through the connecting channel. The third hollow piece is filled with the solution, so that the third hollow piece expands and squeezes the rubber block, so as to strengthen the clamping force of the rubber block on the seamless steel pipe, avoid insufficient clamping force, and prevent the seamless steel pipe from being displaced during the detection process.

[0021] The clamping device for detecting seamless steel pipes for automobiles of the present invention has a precise adjustment function. Through the arrangement of a first fixed plate, a second fixed plate, a first hollow piece, an elastic plate, a clamping groove and a clamping block, a top block moves radially inwardly to drive the two second fixed plates to move. The two second fixed plates move to extrude and deform the two first hollow pieces respectively. The deformation of the two first hollow pieces causes the two elastic plates to approach each other. The two elastic plates approach each other to drive a number of clamping blocks to move into the corresponding clamping grooves. The upper side of the clamping groove contacts the upper plane of the clamping block, and the lower side of the clamping groove contacts the lower inclined surface of the clamping block, so that the push block can move radially inwardly, and the radial outer movement of the push block is limited and fixed, so as to avoid the loosening of the clamping assembly during the detection of the seamless steel pipe, and prevent the accuracy of the hardness detection of the seamless steel pipe from being affected. Then, by setting the limiting groove, the inner side of the guide block and the outer side of the top block slide, so that the outer side of the top block enters the corresponding limiting groove, so as to limit and fix the outer side of the top block through the limiting groove, and avoid the displacement of the top block affecting the clamping and fixing of the seamless steel pipe by the clamping assembly. And the clamping force of the clamping assembly on the seamless steel pipe can be adjusted by coordinating the distribution position of the limiting groove with the inner side of the guide block to form a bell-shaped curve structure with low ends and high in the middle, so that there will be no slipping due to insufficient clamping force, and there will be no indentation on the surface of the seamless steel pipe due to excessive clamping force.

[0022] The clamping device for detecting seamless steel pipes for automobiles of the present invention has a precise adjustment function. Through the arrangement of elastic protrusions, a moving plate, and a spring, the elastic force generated by the compression of the spring acts on the moving plate, so that the moving plate moves downward and drives a number of elastic protrusions to move downward. The downward movement of the several elastic protrusions makes extrusion and friction contact with the upper side of the moving block, so that the moving block moves horizontally smoothly. Then, through the arrangement of the grooves, the lower side of the elastic protrusions enters the corresponding grooves, so as to limit the moving block, so as to further make the moving block move horizontally smoothly, and avoid the moving block from moving too fast, so that the clamping force of the clamping assembly on the seamless steel pipes for automobiles is too large, resulting in indentations on the seamless steel pipes for automobiles, affecting their surface quality. And through the matching of the elastic protrusions and the grooves, the stationary moving block is limited and fixed, so as to avoid the displacement of the moving block. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a first isometric structural schematic diagram of the present invention;

[0026] Figure 2 It is a second isometric structural schematic diagram of the present invention;

[0027] Figure 3 It is a front view structural schematic diagram of the present invention;

[0028] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0029] Figure 5 for Figure 4 A schematic diagram of the structure of the local enlarged view at B in the middle;

[0030] Figure 6 for Figure 4 A schematic diagram of the structure of the partial enlarged view at C in the middle;

[0031] Figure 7 for Figure 6 Schematic diagram of the structure of the local enlarged view at point D in the middle.

[0032] Description of reference numerals:

[0033] Bottom plate 10, U-shaped frame 11, first through hole 12, electric telescopic rod 13, Rockwell hardness tester 14, frame 15, shell 16, round shell 17, stepping motor 18, second through hole 19, push block 20, top block 21, push rod 22, pressure plate 23, slide groove 24, first fixed plate 25, second fixed plate 26, first hollow piece 27, annular piece 28, guide block 29, limit groove 30, arc block 31, rubber block 32, second hollow piece 33, connecting channel 34, third hollow piece 35, elastic plate 36, T-shaped slider 37, slot 38, block 39, first tooth block 40, opening 41, screw rod 42, moving block 43, second tooth block 44, moving plate 45, spring 46, elastic protrusion 47, groove 48. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] As attached Figure 1 To Attachment Figure 7 As shown:

[0038] The invention provides a clamping device for detecting seamless steel pipes for automobiles with a precise adjustment function.

[0039] Refer to the attached Figure 1 To Attachment Figure 7, including a bottom plate 10, a U-shaped frame 11 is fixedly provided on the upper side of the bottom plate 10, an electric telescopic rod 13 is fixedly provided on the upper side of the U-shaped frame 11, a Rockwell hardness tester 14 is fixedly provided on the extended end of the electric telescopic rod 13, two first through holes 12 are respectively provided on both sides of the U-shaped frame 11, two frames 15 are respectively provided on the upper sides of both ends of the bottom plate 10, and two clamping assemblies are respectively provided on the two frames 15; the clamping assembly includes a shell 16, the shell 16 is fixed on the upper side of the frame 15, a round shell 17 is fixedly provided inside the frame 15, a second through hole 19 is provided in the middle of the round shell 17, and a plurality of push blocks are provided on the inner wall of the round shell 17 in a circular array for sliding 20, an arc block 31 is fixedly provided on the inner side of each push block 20, a rubber block 32 is provided on the inner side of the arc block 31, a top block 21 is provided on the outer side of the push block 20, a plurality of first fixing plates 25 are fixedly provided on the inner side of the circular shell 17 in a circumferential array, two second fixing plates 26 are fixedly provided on both sides of each top block 21, two first hollow members 27 are connected between every two first fixing plates 25 and two second fixing plates 26, an annular member 28 is provided in an annular sliding manner inside the circular shell 17, a plurality of guide blocks 29 are fixedly provided on the inner side of the annular member 28 in a circumferential array, and the outer side of each top block 21 is in sliding contact with the inner side of the guide block 29.

[0040] Preferably, see Attachment Figure 4 , Attachment Figure 6 The inner side of each guide block 29 is a bell-shaped curve structure with low ends and high middle, and a plurality of limiting grooves 30 are provided on the inner side of each guide block 29 .

[0041] Preferably, see Attachment Figure 4 , Attachment Figure 6 , Attachment Figure 7 A push rod 22 is fixedly provided on the inner side of the top block 21, a pressure plate 23 is fixedly provided on one end of the push rod 22, a slide groove 24 is provided inside the push block 20, the pressure plate 23 slides inside the slide groove 24, a second hollow piece 33 is connected to the inside of the slide groove 24 on one side of each pressure plate 23, a third hollow piece 35 is connected between the inner side of each arc block 31 and the outer side of the rubber block 32, and a connecting channel 34 is provided to connect the inside of each second hollow piece 33 and the inside of the third hollow piece 35 to each other.

[0042] Preferably, see Attachment Figure 4 , Attachment Figure 6 , Attachment Figure 7 Two elastic plates 36 are fixedly provided on the sides of each two first hollow members 27 close to each other, a plurality of clamping blocks 39 are fixedly provided at intervals on the sides of the two elastic plates 36 close to each other, and a plurality of clamping grooves 38 are provided at intervals on both sides of each push block 20.

[0043] Preferably, see Attachment Figure 4 , Attachment Figure 6 , Attachment Figure 7The upper side of each slot 38 contacts the upper plane of the block 39 , and the lower side of each slot 38 contacts the lower inclined surface of the block 39 .

[0044] Preferably, see Attachment Figure 4 , Attachment Figure 6 , Attachment Figure 7 A T-shaped slider 37 is fixedly provided at the upper end of each elastic plate 36 , and each T-shaped slider 37 slides horizontally inside the first fixed plate 25 .

[0045] Preferably, see Attachment Figure 4 , Attachment Figure 5 An opening 41 is provided on the upper side of the circular shell 17, and a plurality of first tooth blocks 40 are fixedly provided at intervals on the upper side of the annular member 28. The plurality of first tooth blocks 40 are all located inside the opening 41. A moving block 43 is horizontally slidably provided on the upper side of the inner part of the shell 16, and a plurality of second tooth blocks 44 are fixedly provided on the lower side of the moving block 43. The plurality of first tooth blocks 40 are meshed with the plurality of second tooth blocks 44.

[0046] Preferably, see Attachment Figure 4 , Attachment Figure 5 A stepper motor 18 is fixedly provided on one side of the housing 16 , a lead screw 42 is fixedly provided on the output end of the stepper motor 18 , and the outer side of the lead screw 42 contacts the inner thread of the moving block 43 .

[0047] Preferably, see Attachment Figure 4 , Attachment Figure 5 A movable plate 45 is vertically slidably provided on the inner upper side of the shell 16, a plurality of springs 46 are connected between the upper side of the movable plate 45 and the inner upper side of the shell 16, a plurality of elastic protrusions 47 are fixedly provided on the lower side of the movable plate 45, and the lower side of each elastic protrusion 47 is in extrusion and friction contact with the upper side of the movable block 43.

[0048] Preferably, see Attachment Figure 4 , Attachment Figure 5 A plurality of grooves 48 are provided on the upper side of the moving block 43 , and the outer side of each elastic protrusion 47 is in sliding contact with the inner side of the groove 48 .

[0049] Specific use of the present invention:

[0050] The staff passes one end of the seamless steel pipe through the two second through holes 19 and the two first through holes 12, so that the part of the seamless steel pipe for testing hardness is located inside the U-shaped frame 11, and the two ends of the seamless steel pipe are respectively located in the two second through holes 19. At this time, the control system operates the two clamping components to start, and the two stepper motors 18 are started, and the stepper motor 18 starts to drive the screw rod 42 to rotate. The outer side of the screw rod 42 contacts the internal thread of the moving block 43, so that the screw rod 42 rotates to drive the moving block 43 to move horizontally. Through the engagement of a plurality of first tooth blocks 40 with a plurality of second tooth blocks 44, the movement of the moving block 43 drives the movement of a plurality of second tooth blocks 44, so that the annular member 28 slides in an annular manner inside the round shell 17. Among them, the elastic force generated by the compression of the spring 46 acts on the moving plate 45, so that the moving plate 45 moves downward and drives a plurality of elastic protrusions 47 to move downward, and a plurality of elastic protrusions 47 move downward to squeeze and frictionally contact with the upper side of the moving block 43, so that the moving block 43 moves horizontally smoothly. Then, the lower side of the elastic protrusion 47 enters into the corresponding groove 48, thereby limiting the moving block 43, so as to further make the moving block 43 move smoothly horizontally, and avoid the moving block 43 moving too fast, which will cause the clamping force of the clamping assembly on the automobile seamless steel pipe to be too large, causing indentations on the automobile seamless steel pipe and affecting its surface quality.

[0051] Then, the circular shell 17 slides in an annular manner to drive the guide block 29 to move, and the inner side of the guide block 29 slides and contacts with the outer side of the top block 21, and the inner side of the guide block 29 presents a bell-shaped curve structure with low ends and high in the middle. The guide block 29 moves to squeeze the top block 21 to move radially inward, and the radial inward movement of the top block 21 drives the push block 20 and the arc block 31 and the rubber block 32 to move radially inward, so that the outer side of the seamless steel pipe is clamped and fixed by the radial inward movement of a plurality of arc blocks 31 and rubber blocks 32, so that the distance of the guide block 29 driven by the annular sliding of the ring member 28 can be controlled to control a plurality of arc blocks 31 and rubber blocks 32 to quickly clamp and fix seamless steel pipes of different diameters, and can be flexibly adjusted according to automobile seamless steel pipes of different diameters, which is convenient for the staff to operate and use, and improves the flexibility of the device to a certain extent. So that the two ends of the seamless steel pipe can be automatically and quickly clamped and fixed by two clamping components. The inner side of the guide block 29 slides with the outer side of the top block 21, so that the outer side of the top block 21 enters the corresponding limit groove 30, so as to limit and fix the outer side of the top block 21 through the limit groove 30, and avoid the displacement of the top block 21 affecting the clamping and fixing of the seamless steel pipe by the clamping assembly. And the clamping force of the clamping assembly on the seamless steel pipe can be adjusted by coordinating the distribution position of the limit groove 30 with the inner side of the guide block 29 in a bell-shaped curve structure with low ends and high in the middle, so that there will be no slipping due to insufficient clamping force, and there will be no indentation on the surface of the seamless steel pipe due to excessive clamping force.

[0052] At the same time, the radial inner movement of the top block 21 drives the push rod 22 and the pressure plate 23 to move radially inward, and the pressure plate 23 slides in the slide groove 24 to squeeze and deform the second hollow member 33. The squeezing of the second hollow member 33 generates elastic force, which is conducive to moving and resetting the pressure plate 23. The second hollow member 33 is squeezed and deformed, so that the solution in the second hollow member 33 enters the third hollow member 35 through the connecting channel 34, and the third hollow member 35 is filled with the solution, so that the third hollow member 35 expands and squeezes the rubber block 32, so as to strengthen the clamping force of the rubber block 32 on the seamless steel pipe, avoid the situation of insufficient clamping force, and prevent the seamless steel pipe from displacement during the detection process.

[0053] At the same time, the radial inner movement of the top block 21 drives the two second fixing plates 26 to move, and the two second fixing plates 26 move to squeeze and deform the two first hollow pieces 27 respectively. The two first hollow pieces 27 are squeezed and deformed to generate elastic force, which is conducive to moving and resetting the two second fixing plates 26. The deformation of the two first hollow pieces 27 makes the two elastic plates 36 approach each other, and the two elastic plates 36 approach each other to drive a number of card blocks 39 to move into the corresponding card slots 38. When the push block 20 moves radially inward, the lower side of the card slot 38 contacts the lower side inclined surface of the card block 39, and the push block 20 moves to guide the card block 39, and the card block 39 moves out of the card slot 38, and the card block 39 moves to compress the elastic plate 36 to generate elastic force, so that under the action of the elastic force of the elastic plate 36, the card block 39 can be moved back into the card slot 38. When the push block 20 moves radially outward, the upper side of the slot 38 contacts the upper plane of the block 39, thereby limiting and fixing the radial outward movement of the push block 20. So that the upper side of the slot 38 contacts the upper plane of the block 39, and the lower side of the slot 38 contacts the lower inclined surface of the block 39, so that the push block 20 can move radially inward, and the radial outward movement of the push block 20 is limited and fixed, avoiding the loosening of the clamping assembly during the seamless steel pipe inspection process, and preventing the accuracy of the hardness inspection of the seamless steel pipe from being affected. Among them, the movement of the elastic plate 36 drives the T-shaped slider 37 to slide horizontally in the third hollow member 35, so that the elastic plate 36 moves horizontally.

[0054] Finally, the control system controls the electric telescopic rod 13 to extend, and the electric telescopic rod 13 extends to drive the Rockwell hardness tester 14, and the Rockwell hardness tester 14 contacts the outer side of the seamless steel pipe downward, thereby performing Rockwell hardness test on the seamless steel pipe.

[0055] The present invention provides a clamping device for detecting seamless steel pipes for automobiles with a precise adjustment function. Through the arrangement of an annular member 28, a guide block 29, a top block 21, a push block 20, an arc block 31, and a rubber block 32, a circular shell 17 annularly slides to drive the guide block 29 to move, the inner side of the guide block 29 is in sliding contact with the outer side of the top block 21, and the inner side of the guide block 29 is a bell-shaped curve structure with low ends and high middle, so that the guide block 29 moves to squeeze the top block 21 to move radially inward, and the radial inward movement of the top block 21 drives the push block 20 and the arc block 31 and the rubber block 32 to move radially inward, so that the outer side of the seamless steel pipe is clamped and fixed by the radial inward movement of the plurality of arc blocks 31 and the rubber block 32, so that the plurality of arc blocks 31 and the rubber block 32 can be controlled by controlling the distance by which the annular member 28 drives the guide block 29 to move to quickly clamp and fix seamless steel pipes of different diameters. Then, through the arrangement of the push rod 22, the pressure plate 23, the second hollow piece 33, the third hollow piece 35, and the connecting channel 34, the radial inner movement of the top block 21 drives the push rod 22 and the pressure plate 23 to move radially inward, and the pressure plate 23 slides in the slide groove 24 to squeeze and deform the second hollow piece 33, and the second hollow piece 33 squeezes and generates elastic force. The second hollow piece 33 is squeezed and deformed, so that the solution in the second hollow piece 33 enters the third hollow piece 35 through the connecting channel 34, and the third hollow piece 35 is filled with the solution, so that the third hollow piece 35 expands and squeezes the rubber block 32, so as to strengthen the clamping force of the rubber block 32 on the seamless steel pipe, avoid the situation of insufficient clamping force, and prevent the seamless steel pipe from displacement during the detection process.

[0056] The clamping device for detecting seamless steel pipes for automobiles with a precise adjustment function of the present invention, through the arrangement of the first fixed plate 25, the second fixed plate 26, the first hollow piece 27, the elastic plate 36, the slot 38, and the block 39, the top block 21 moves radially inward to drive the two second fixed plates 26 to move, the two second fixed plates 26 move to extrude and deform the two first hollow pieces 27 respectively, the two first hollow pieces 27 are deformed to make the two elastic plates 36 approach each other, the two elastic plates 36 approach each other to drive a number of blocks 39 to move into the corresponding slots 38; the upper side of the slot 38 contacts the upper plane of the block 39, and the lower side of the slot 38 contacts the lower inclined surface of the block 39, so that the push block 20 can move radially inward, and the radial outer movement of the push block 20 is limited and fixed, so as to avoid the loosening of the clamping assembly during the detection of the seamless steel pipe, and prevent the accuracy of the hardness detection of the seamless steel pipe from being affected. Then, by setting the limiting groove 30, the inner side of the guide block 29 slides with the outer side of the top block 21, so that the outer side of the top block 21 enters the corresponding limiting groove 30, so as to limit and fix the outer side of the top block 21 through the limiting groove 30, and avoid the displacement of the top block 21 affecting the clamping and fixing of the seamless steel pipe by the clamping assembly. And the clamping force of the clamping assembly on the seamless steel pipe can be adjusted by cooperating with the bell-shaped curve structure with low ends and high middle on the inner side of the guide block 29 through the distribution position of the limiting groove 30, so that there will be no slipping due to insufficient clamping force, and there will be no indentation on the surface of the seamless steel pipe due to excessive clamping force.

[0057] The clamping device for detecting seamless steel pipes for automobiles of the present invention with precise adjustment function, through the setting of elastic protrusions 47, moving plates 45, and springs 46, the elastic force generated by the compression of springs 46 acts on the moving plates 45, so that the moving plates 45 move downward and drive a number of elastic protrusions 47 to move downward, and a number of elastic protrusions 47 move downward to make extrusion and friction contact with the upper side of the moving block 43, so that the moving block 43 moves horizontally smoothly. Then, through the setting of grooves 48, the lower side of the elastic protrusions 47 enters the corresponding grooves 48, so as to limit the moving block 43, so as to further make the moving block 43 move horizontally smoothly, and avoid the moving block 43 moving too fast, so that the clamping force of the clamping assembly on the seamless steel pipes for automobiles is too large, resulting in indentations on the seamless steel pipes for automobiles, affecting their surface quality. And through the matching of the elastic protrusions 47 and the grooves 48, the moving block 43 that stops moving is limited and fixed, so as to avoid the displacement of the moving block 43.

[0058] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A clamping device for detecting seamless steel pipes for automobiles with precise adjustment function, characterized in that: The invention comprises a bottom plate (10), a U-shaped frame (11) is fixedly provided on the upper side of the bottom plate (10), an electric telescopic rod (13) is fixedly provided on the upper side of the U-shaped frame (11), a Rockwell hardness tester (14) is fixedly provided on the extended end of the electric telescopic rod (13), two first through holes (12) are respectively provided on both sides of the U-shaped frame (11), two frames (15) are respectively provided on the upper sides of the two ends of the bottom plate (10), and two clamping assemblies are respectively provided on the two frames (15); the clamping assembly comprises a shell (16), the shell (16) is fixed on the upper side of the frame (15), a round shell (17) is fixedly provided inside the frame (15), a second through hole (19) is provided in the middle of the round shell (17), and a plurality of push rods (19) are provided in a circular array on the inner wall of the round shell (17) for sliding movement. A block (20), an arc block (31) is fixedly provided on the inner side of each push block (20), a rubber block (32) is provided on the inner side of the arc block (31), a top block (21) is provided on the outer side of the push block (20), a first fixing plate (25) is fixedly provided in a circular array on the inner side of the circular shell (17), two second fixing plates (26) are fixedly provided on both sides of each top block (21), two first hollow members (27) are connected between each two first fixing plates (25) and two second fixing plates (26), an annular member (28) is provided in an annular sliding manner inside the circular shell (17), a plurality of guide blocks (29) are fixedly provided in a circular array on the inner side of the annular member (28), and the outer side of each top block (21) is in sliding contact with the inner side of the guide block (29); The inner side of each guide block (29) is in a bell-shaped curve structure with low ends and high middle, and a plurality of limit grooves (30) are provided on the inner side of each guide block (29); A push rod (22) is fixedly provided on the inner side of the top block (21), a pressure plate (23) is fixedly provided on one end of the push rod (22), a slide groove (24) is provided inside the push block (20), the pressure plate (23) slides inside the slide groove (24), a second hollow piece (33) is connected to the inside of each pressure plate (23) and the slide groove (24), a third hollow piece (35) is connected between the inner side of each arc block (31) and the outer side of the rubber block (32), and a connecting channel (34) is provided between the inside of each second hollow piece (33) and the inside of the third hollow piece (35) which are mutually connected; Two elastic plates (36) are fixedly provided on the sides of each two of the first hollow members (27) close to each other, a plurality of clamping blocks (39) are fixedly provided at intervals on the sides of the two elastic plates (36) close to each other, and a plurality of clamping grooves (38) are provided at intervals on both sides of each push block (20); The upper side of each of the card slots (38) contacts the upper plane of the card block (39), and the lower side of each of the card slots (38) contacts the lower inclined surface of the card block (39).

2. The clamping device for detecting seamless steel pipes for automobiles with precise adjustment function according to claim 1, characterized in that: A T-shaped slider (37) is fixedly provided at the upper end of each elastic plate (36), and each T-shaped slider (37) slides horizontally inside the first fixed plate (25).

3. The clamping device for detecting seamless steel pipes for automobiles with precise adjustment function according to claim 1, characterized in that: An opening (41) is provided on the upper side of the circular shell (17); a plurality of first tooth blocks (40) are fixedly provided at intervals on the upper side of the annular member (28); the plurality of first tooth blocks (40) are all located inside the opening (41); a moving block (43) is horizontally slidably provided on the upper side of the interior of the shell (16); a plurality of second tooth blocks (44) are fixedly provided on the lower side of the moving block (43); the plurality of first tooth blocks (40) are meshed with the plurality of second tooth blocks (44).

4. The clamping device for detecting seamless steel pipes for automobiles with precise adjustment function according to claim 3 is characterized in that: A stepper motor (18) is fixedly provided on one side of the housing (16), a lead screw (42) is fixedly provided on the output end of the stepper motor (18), and the outer side of the lead screw (42) is in contact with the internal thread of the moving block (43).

5. The clamping device for detecting seamless steel pipes for automobiles with precise adjustment function according to claim 4, characterized in that: A movable plate (45) is vertically slidably provided on the inner upper side of the shell (16); a plurality of springs (46) are connected between the upper side of the movable plate (45) and the inner upper side of the shell (16); a plurality of elastic protrusions (47) are fixedly provided on the lower side of the movable plate (45); the lower side of each elastic protrusion (47) is in extrusion and friction contact with the upper side of the movable block (43).

6. The clamping device for detecting seamless steel pipes for automobiles with precise adjustment function according to claim 5, characterized in that: A plurality of grooves (48) are provided on the upper side of the moving block (43), and the outer side of each elastic protrusion (47) is in sliding contact with the inner side of the groove (48).

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