Steel bar sample straightening machine for detection

Abstract

The utility model discloses a reinforcing steel bar sample straightening machine for detection, which comprises a base, a pulley capable of moving left and right is arranged on the base, a lower bearing plate capable of moving front and back is arranged on the pulley, and a plurality of placing grooves for adapting to different reinforcing steel bars are arranged on the upper surface of the lower bearing plate. A reinforcing steel bar fixing mechanism for fixing a reinforcing steel bar is mounted on one side of the lower bearing plate; the device can effectively reduce the labor intensity of workers, can quickly adapt to straightening and straightening of multiple types of steel bars, is small in equipment occupied area, and improves the production efficiency on the basis of reducing local plastic deformation of a sample as much as possible and on the premise of not damaging the appearance of a raw material sample. And the situations of material damage loss, material local section diameter change, material mechanical property change and the like caused by material appearance change due to direct contact with a sample point are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering detection, in particular to a steel bar sample straightening machine for detection. Background Art

[0002] Small-sized steel products with a diameter of 6mm to 12mm are basically delivered in the form of coils, which makes it difficult to take samples for quality inspection in the later stage.

[0003] Manual hammering and straightening of steel samples is time-consuming, labor-intensive, and has poor straightening effects. At the same time, the current straightening machines on the market have high manufacturing costs, bulky bodies, and high maintenance costs for the hydraulic components of the equipment, occupy large space, and consume high energy.

[0004] Directly hitting with a hammer or using a hydraulic clamp to contact the sample point may change the shape of the material, even cause damage to the sample material, change the local cross-sectional diameter of the material, cause changes in the mechanical properties of the material, and cause disputes over the test results.

[0005] For this purpose, a steel bar sample straightening machine for testing is proposed. Summary of the invention

[0006] The purpose of the utility model is to provide a steel bar sample straightening machine for testing to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steel bar sample straightening machine for testing, comprising a base, a pulley that can move left and right is installed on the base, a lower pressure plate that can move forward and backward is installed on the pulley, a plurality of placement grooves for adapting to different steel bars are opened on the upper surface of the lower pressure plate, and a steel bar fixing mechanism for fixing the steel bars is installed on one side of the lower pressure plate;

[0008] A shell is installed on the base, a sliding rod is slidably connected to the front surface of the shell, an upper pressure plate is installed at the bottom end of the sliding rod, an upper pressure plate is detachably installed on the lower surface of the upper pressure plate, a groove for fitting steel bars is provided on the upper pressure plate, and a hammer block is slidably connected to the sliding rod;

[0009] A hammer driving mechanism for the free fall of the hammer block is installed inside the shell, and a lifting mechanism for driving the upper pressure plate to separate from the lower pressure plate is installed on one side of the shell.

[0010] Preferably: the hammer drive mechanism comprises a sprocket;

[0011] The sprocket is installed inside the shell, a chain is installed on the sprocket, and a weight-lifting protrusion for driving the hammer block to move upward is installed on the outer side of the chain.

[0012] Preferably: the hammer drive mechanism further includes a leaf spring and a weight-removing protrusion;

[0013] The leaf spring is installed on the outside of the hammer block, and a sliding pin cooperating with the weight-lifting protrusion is installed on one side of the leaf spring. The sliding pin passes through the hammer block, and an inclined surface cooperating with the weight-removing protrusion is provided on the sliding pin;

[0014] The weight-removing protrusion is installed above the sliding rod.

[0015] Preferably: the lifting mechanism comprises a manual pull rod and a fixed rod;

[0016] A rotating shaft is installed at the top end of the manual pull rod, the rotating shaft is rotatably connected to the top of the housing, and a lever is installed at the other end of the rotating shaft;

[0017] The fixing rod is installed on the top end of the sliding rod, and the shifting rod is located below the fixing rod.

[0018] Preferably: a positioning pin for fixing the position of the manual pull rod is provided below the manual pull rod, and the positioning pin is installed on one side of the housing.

[0019] Preferably: the steel bar fixing mechanism comprises a frame;

[0020] A threaded rod is threadedly connected to the upper part of the frame, and an arc-shaped plate is rotatably connected to the bottom end of the threaded rod. The inner side wall of the arc-shaped plate and the lower surface of the frame are both provided with protrusions.

[0021] Preferably, the upper pressure plate and the upper pressure bearing plate are clamped to each other via clamping grooves and clamping blocks and fixed with bolts.

[0022] Preferably, a guide rail is installed on the base, the pulley is slidably connected to the guide rail, and guide rail limit blocks for limiting the position of the pulley are installed at both ends of the guide rail.

[0023] Preferably, a screw rod for controlling the forward and backward movement of the lower pressure plate is installed between the lower pressure plate and the pulley.

[0024] Preferably: a limiting cylinder is installed above the front surface of the shell, and the sliding rod is slidably connected to the inside of the limiting cylinder.

[0025] Compared with the prior art, the beneficial effects of the utility model are: the present invention can effectively reduce manual labor intensity, can quickly adapt to the straightening and correction of various types of steel bars, the equipment occupies a small area, and on the basis of ensuring that the local plastic deformation of the sample is reduced as much as possible, it does not damage the surface of the original material sample, and avoids direct contact with the sample point to change the material shape, cause sample material damage and loss, change the local cross-sectional diameter of the material, and cause changes in the mechanical properties of the material.

[0026] At the same time, this equipment does not use the expensive electro-hydraulic servo hydraulic accessories on the market, so it does not have the disadvantages of easy damage to hydraulic parts and high maintenance costs. It occupies a small space, reduces space waste in the testing site and reduces the cost of use, while meeting the inspection and testing needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 It is a side view cutaway structural schematic diagram of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the steel bar fixing mechanism of the utility model;

[0030] Figure 4 It is a structural schematic diagram of the guide rail of the utility model;

[0031] Figure 5 It is a structural schematic diagram of the lower pressure plate of the utility model.

[0032] In the figure: 1. base; 2. guide rail; 21. guide rail limit block; 3. pulley; 4. lower pressure plate; 5. steel bar fixing mechanism; 51. frame; 52. threaded rod; 53. arc plate; 6. shell; 7. sliding rod; 8. hammer block; 9. upper pressure plate; 10. upper pressure plate; 11. hammer drive mechanism; 110. sprocket; 111. chain; 112. weight-lifting protrusion; 113. leaf spring; 114. sliding pin; 115. weight-removing protrusion; 12. lifting mechanism; 121. manual pull rod; 122. positioning pin; 123. rotating shaft; 124. lever; 125. fixing rod; 13. limiting cylinder; 14. screw rod. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] Example

[0035] See also Figure 1-5The utility model provides a technical solution: a steel bar sample straightening machine for testing, comprising a base 1, a pulley 3 which can move left and right is installed on the base 1, a lower pressure plate 4 which can move forward and backward is installed on the pulley 3, a plurality of placement grooves for adapting to different steel bars are opened on the upper surface of the lower pressure plate 4, and a steel bar fixing mechanism 5 for fixing the steel bars is installed on one side of the lower pressure plate 4; through the above arrangement, the lower pressure plate 4 is placed on the pulley 3 which is equipped with a through-axis rigid load-bearing roller, the pulley 3 can slide stably left and right along the rigid guide rail 2 on the base 1, and the sample to be straightened is placed in a groove of corresponding sample specifications on the lower pressure plate 4 with a groove, and one end of the sample is fixed by the steel bar fixing mechanism 5.

[0036] A shell 6 is installed on the base 1, and a sliding rod 7 is slidably connected to the front surface of the shell 6. An upper pressure plate 9 is installed at the bottom end of the sliding rod 7. An upper pressure plate 10 is detachably installed on the lower surface of the upper pressure plate 9. A groove suitable for steel bars is opened on the upper pressure plate 10, and a hammer block 8 is slidably connected to the sliding rod 7. Through the above settings, the steel bar grooves of different types on the lower pressure plate 4 and the replaceable upper pressure plate 10 on the upper pressure plate 9 form a set of matching steel bar molds through the forward and backward translation of the lower pressure plate 4, so as to pre-clamp the deformed steel bar specimens.

[0037] A hammer driving mechanism 11 for the free fall of the hammer block 8 is installed inside the shell 6 , and a lifting mechanism 12 for driving the upper pressure plate 10 to separate from the lower pressure plate 4 is installed on one side of the shell 6 .

[0038] like Figure 2 As shown: the hammer driving mechanism 11 includes a sprocket 110; the sprocket 110 is installed inside the housing 6, a chain 111 is installed on the sprocket 110, and a weight-lifting protrusion 112 for driving the hammer block 8 to move upward is installed on the outer side of the chain 111; through the above arrangement, the motor drives the sprocket 110 and the chain 111 to move, the weight-lifting protrusion 112 on the chain 111 rotates with the chain 111, and cooperates with the sliding pin 114 on the hammer block 8 to drive the hammer block 8 to move upward.

[0039] like Figure 1 and Figure 2As shown: the hammer driving mechanism 11 also includes a leaf spring 113 and a weight-removing protrusion 115; the leaf spring 113 is installed on the outer side of the hammer block 8, and a sliding pin 114 cooperating with the weight-lifting protrusion 112 is installed on one side of the leaf spring 113, the sliding pin 114 passes through the hammer block 8, and the sliding pin 114 is provided with an inclined surface cooperating with the weight-removing protrusion 115; the weight-removing protrusion 115 is installed above the sliding rod 7; through the above arrangement, when the hammer block 8 moves upward, the sliding pin 114 will contact with the weight-removing protrusion 115, so that the sliding pin 114 moves away from the weight-lifting protrusion 112 through the weight-removing protrusion 115, and then the sliding pin 114 is separated from the weight-lifting protrusion 112, so that the hammer block 8 loses its restriction and freely falls to complete the hammering work, and at the same time, the sliding pin 114 can be restored to its original position through the leaf spring 113, which is convenient for the next work.

[0040] like Figure 1 and Figure 2 As shown: the lifting mechanism 12 includes a manual pull rod 121 and a fixed rod 125; a rotating shaft 123 is installed at the top of the manual pull rod 121, and the rotating shaft 123 is rotatably connected to the top of the shell 6, and a driving rod 124 is installed at the other end of the rotating shaft 123; the fixed rod 125 is installed at the top of the sliding rod 7, and the driving rod 124 is located below the fixed rod 125. A positioning pin 122 for fixing the position of the manual pull rod 121 is provided below the manual pull rod 121, and the positioning pin 122 is installed on one side of the shell 6; through the above arrangement, when the upper pressure plate 10 needs to be replaced or steel bars need to be placed, the manual pull rod 121 is pushed and pulled to drive the rotating shaft 123 and the driving rod 124 to rotate. Since the driving rod 124 is located below the fixed rod 125, when the driving rod 124 rotates upward, the sliding rod 7 will be driven to move upward through the fixed rod 125, so that the upper pressure plate 10 moves upward a certain distance, which is convenient for subsequent work.

[0041] like Figure 3 As shown: the steel bar fixing mechanism 5 includes a frame 51; a threaded rod 52 is threadedly connected to the top of the frame 51, and the bottom end of the threaded rod 52 is rotatably connected to an arc plate 53, and the inner side wall of the arc plate 53 and the lower surface of the frame 51 are both provided with protrusions; through the above arrangement, one end of the steel bar is placed inside the frame 51, and then the threaded rod 52 is rotated to move the arc plate 53 downward, and then the end of the steel bar is clamped by the arc plate 53, thereby avoiding the situation where the steel bar moves at will.

[0042] like Figure 5 As shown: the upper pressure plate 10 and the upper pressure plate 9 are mutually clamped by a clamping slot and a clamping block and fixed by bolts; through the above arrangement, the clamping slot and the clamping block can quickly complete the replacement of the upper pressure plate 10 and fix it by bolts at the same time.

[0043] like Figure 1 and Figure 4 As shown: a guide rail 2 is installed on the base 1, and the pulley 3 is slidably connected to the guide rail 2. Both ends of the guide rail 2 are equipped with guide rail limit blocks 21 for limiting the position of the pulley 3; through the above settings, the pulley 3 can move smoothly, and guide rail limit blocks 21 are provided at both ends of the guide rail 2 to prevent the pulley 3 from sliding off the track.

[0044] like Figure 4 and Figure 5 As shown: a screw rod 14 for controlling the forward and backward movement of the lower pressure plate 4 is installed between the lower pressure plate 4 and the pulley 3; through the above arrangement, one side of the lower pressure plate 4 on the pulley 3 is provided with a screw rod 14 which can be rotated forward and backward to adjust the position of the lower pressure plate 4, and there is a lower groove on the lower pressure plate 4 which is adapted to different steel materials. By rotating the screw rod 14 clockwise or counterclockwise, the lower pressure plate 4 can be stably translated forward and backward.

[0045] like Figure 1 and Figure 2 As shown: a limiting cylinder 13 is installed above the front surface of the shell 6, and the sliding rod 7 is slidably connected to the inside of the limiting cylinder 13; through the above arrangement, the position of the sliding rod 7 is limited, and the sliding rod 7 is limited to produce horizontal displacement and swing during action, causing the upper pressure plate 9 to be offset, thereby ensuring the stability and tightness of the upper and lower pressure plates during the steel bar straightening process and ensuring the straightening effect.

[0046] Working principle: The present invention adopts a concave mold with the same specifications as the sample to pre-hold the sample, and places the sample to be straightened in a groove of the corresponding sample specification on the lower pressure plate 4. One end of the sample is fixed on the steel bar fixing mechanism 5. The lower pressure plate 4 is placed on a pulley 3 equipped with a through-axis rigid load-bearing roller. The pulley 3 can slide stably left and right along the rigid guide rail 2 on the base 1.

[0047] The lower pressure plate 4 is provided with a screw rod 14 that can be rotated forward and backward to adjust the movement of the lower pressure plate 4. The lower pressure plate 4 is provided with grooves adapted to different steel materials. The clockwise or counterclockwise rotation of the screw rod 14 can achieve the effect of stable translation of the lower pressure plate 4 forward and backward. Through the forward and backward translation of the lower pressure plate 4, the grooves of different types of steel bars on the plate and the replaceable upper pressure plate 10 on the upper pressure plate 9 form a set of matching steel bar molds to pre-clamp the deformed steel bar specimens.

[0048] By pushing and pulling the manual pull rod 121, the lifting mechanism 12 can easily lift the sliding rod 7, the hammer block 8, the upper pressure plate 9 and the upper pressure plate 10 vertically as a whole. The manual pull rod 121 is pulled to the positioning pin 122 and then locked. The upper pressure plate 10 that can adapt to different steel materials and cross-sectional sizes can be quickly replaced by disassembling and assembling the positioning screws to make the upper and lower grooves consistent. At this time, the positioning pin 122 is opened to allow the steel bars to be pre-clamped between the upper pressure plate 10 and the lower pressure plate 4.

[0049] Then the equipment is started, and the driving motor in the shell 6 drives the sprocket 110 and the chain 111 to move. The weight-lifting protrusion 112 on the chain 111 rotates with the chain 111, and drives the hammer block 8 to rise to the weight-removing protrusion 115 at the upper end of the sliding rod 7 through the sliding pin 114 on the hammer block 8. The sliding pin 114 is squeezed by the weight-removing protrusion 115, so that the hammer block 8 loses its restriction, completes the free fall work, and falls freely along the sliding rod 7, and hammers onto the upper pressure plate 9, converting the point load generated by the hammering to the upper and lower pressure plates, and applying it to the surface load on the steel bar sample to be straightened, until the upper and lower pressure plates gradually close, indicating that the sample has been straightened. Stop the equipment, pull up the manual pull rod 121, unscrew the steel bar fixing mechanism 5 at one end of the lower pressure plate 4, remove the steel sample, replace it with a new sample and repeat the straightening.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel bar sample straightening machine for testing, comprising a base (1), characterized in that: The base (1) is provided with a pulley (3) that can move left and right, and the pulley (3) is provided with a lower pressure plate (4) that can move forward and backward, and the upper surface of the lower pressure plate (4) is provided with a plurality of placement grooves for adapting to different steel bars, and a steel bar fixing mechanism (5) for fixing steel bars is installed on one side of the lower pressure plate (4); A shell (6) is installed on the base (1), and a sliding rod (7) is slidably connected to the front surface of the shell (6), an upper pressure plate (9) is installed at the bottom end of the sliding rod (7), and an upper pressure plate (10) is detachably installed on the lower surface of the upper pressure plate (9), and a groove adapted to the steel bar is provided on the upper pressure plate (10), and a hammer block (8) is slidably connected to the sliding rod (7); A hammer drive mechanism (11) for the free fall of the hammer block (8) is installed inside the shell (6), and a lifting mechanism (12) for driving the upper pressure plate (10) to separate from the lower pressure plate (4) is installed on one side of the shell (6).

2. The steel bar sample straightening machine for testing according to claim 1, characterized in that: The hammer driving mechanism (11) comprises a sprocket (110); The sprocket (110) is installed inside the housing (6), a chain (111) is installed on the sprocket (110), and a weight-lifting protrusion (112) for driving the hammer block (8) to move upward is installed on the outer side of the chain (111).

3. The steel bar sample straightening machine for testing according to claim 2, characterized in that: The hammer drive mechanism (11) further comprises a leaf spring (113) and a weight-removing protrusion (115); The leaf spring (113) is installed on the outside of the hammer block (8), and a sliding pin (114) cooperating with the weight-lifting protrusion (112) is installed on one side of the leaf spring (113). The sliding pin (114) passes through the hammer block (8), and an inclined surface cooperating with the weight-releasing protrusion (115) is provided on the sliding pin (114); The weight-removing protrusion (115) is installed above the sliding rod (7).

4. The steel bar sample straightening machine for testing according to claim 1, characterized in that: The lifting mechanism (12) comprises a manual pull rod (121) and a fixing rod (125); A rotating shaft (123) is installed at the top end of the manual pull rod (121), the rotating shaft (123) is rotatably connected to the top of the housing (6), and a lever (124) is installed at the other end of the rotating shaft (123); The fixing rod (125) is installed on the top end of the sliding rod (7), and the shifting rod (124) is located below the fixing rod (125).

5. The steel bar sample straightening machine for testing according to claim 4, characterized in that: A positioning pin (122) for fixing the position of the manual pull rod (121) is provided below the manual pull rod (121), and the positioning pin (122) is installed on one side of the housing (6).

6. The steel bar sample straightening machine for testing according to claim 1, characterized in that: The steel bar fixing mechanism (5) comprises a frame (51); A threaded rod (52) is threadedly connected to the upper portion of the frame (51), and a curved plate (53) is rotatably connected to the lower end of the threaded rod (52). The inner side wall of the curved plate (53) and the lower surface of the frame (51) are both provided with protrusions.

7. The steel bar sample straightening machine for testing according to claim 1, characterized in that: The upper pressure plate (10) and the upper pressure bearing plate (9) are mutually clamped via clamping grooves and clamping blocks and are fixed using bolts.

8. The steel bar sample straightening machine for testing according to claim 1, characterized in that: A guide rail (2) is installed on the base (1), the pulley (3) is slidably connected to the guide rail (2), and guide rail limit blocks (21) for limiting the position of the pulley (3) are installed at both ends of the guide rail (2).

9. The steel bar sample straightening machine for testing according to claim 1, characterized in that: A screw rod (14) for controlling the forward and backward movement of the lower pressure plate (4) is installed between the lower pressure plate (4) and the pulley (3).

10. The steel bar sample straightening machine for testing according to claim 1, characterized in that: A limiting cylinder (13) is installed above the front surface of the housing (6), and the sliding rod (7) is slidably connected to the inside of the limiting cylinder (13).

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