CN218412005U

CN218412005U - Steel bar bending tester

Info

Publication number: CN218412005U
Application number: CN202222326993.4U
Authority: CN
Inventors: 杜正党; 武艳如; 王小梅
Original assignee: Chongqing Chengxin Construction Engineering Quality Inspection Co ltd
Current assignee: Chongqing Chengxin Construction Engineering Quality Inspection Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2023-01-31
Anticipated expiration: 2032-08-31

Abstract

The utility model belongs to the technical field of steel test equipment, in particular to a steel bar bending test machine, which comprises an operation table, a rotating disc, a stop pin, a jacking mechanism and a first limiting mechanism, wherein the rotating disc is rotatably arranged on the operation table, a bending central column is arranged at the center of the rotating disc, and a mounting hole is formed on the rotating disc; the jacking mechanism comprises a jacking rod, and the jacking rod can move towards the direction close to or far away from the bent central column; the first limiting mechanism comprises a first limiting plate and a first fixing device, one end of the first limiting plate is connected with the ejector rod, the other end of the first limiting plate is hinged with the operating platform, the first limiting plate is located between the ejector rod and the bending central column, a metal gasket with a rough surface is arranged on the side face, facing the bending central column, of the first limiting plate, and the first fixing device can fix the position of the steel bar; the problem of reinforcing bar displacement takes place at the bending in-process to influence bending accuracy and damage equipment is solved.

Description

Steel bar bending tester

Technical Field

The utility model belongs to the technical field of steel test equipment, concretely relates to reinforcing bar bending test machine.

Background

The steel bar bending tester is a special device for carrying out plane forward and reverse bending tests on steel bars, and the device is widely applied to units of metallurgy, mechanical manufacturing industry, building construction industry, engineering supervision, technical quality supervision and the like to test the forward and reverse bending mechanical properties of various steel bars.

At present, chinese patent with publication number CN209327135U discloses a reinforcing bar reverse bending test device, including the test bench body, rotating disc and top tight mechanism, the front side of test bench body is provided with the limit plate, the left side of limit plate articulates there is the limiting plate, the left side wall and the top tight mechanism of the other end of limiting plate are connected, rotating disc's center is provided with the center post of buckling, adjustable fixer has been placed perpendicularly on the limiting plate along length direction, fixer and the right side wall of limiting plate form another fixed point, during the reinforcing bar is buckled experimentally, place the reinforcing bar between two fixed points, keep away from operator's reinforcing bar one end and stretch fender round pin department.

Although the device has simple and flexible structure and convenient operation, the following problems still exist: the steel bar is usually cylindrical, before the bending test, the steel bar is abutted between the limiting plate and the fixer, the contact area between the surface of the steel bar and the limiting plate and the fixer is small, the contact surface is smooth, and the steel bar is easy to displace in the bending process, so that the bending precision of the steel bar is influenced; and because reinforcing bar deformation volume and reaction force are very big, limiting plate surface abrasion is serious, needs frequently to change the limiting plate, complex operation and equipment use cost are high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a reinforcing bar bending test machine to solve the reinforcing bar and take place the displacement in bending process, influence the bending accuracy and damage the problem of equipment.

In order to achieve the above object, the present invention provides the following technical solutions:

a steel bar bending tester comprises an operation table, a rotary disc, a stop pin, a jacking mechanism and a first limiting mechanism, wherein the rotary disc is rotatably arranged on the operation table, a bending central column is arranged at the center of the rotary disc, and a mounting hole is formed in the rotary disc; the jacking mechanism is arranged on the operating platform and comprises a mandril, and the mandril can be close to or far away from the bent central column; first stop gear includes first limiting plate and first fixing device, and first limiting plate one end is connected with the ejector pin, and the first limiting plate other end is articulated with the operation panel, and first limiting plate is located the ejector pin and buckles between the center post, and first limiting plate is equipped with rough surface's metal gasket towards the side of buckling the center post, and first fixing device slidable mounting is on the limiting plate, and first fixing device can the fixed steel bar position.

The technical principle of the utility model is that:

through the position of adjusting first fixing device, fix the reinforcing bar between first limiting plate and first fixing device, install the backing pin in the mounting hole on the rotating disc, the backing pin is located the both sides of reinforcing bar respectively with the center post of buckling, utilizes the tight mechanism in top to promote first limiting plate one end, makes first limiting plate remove to the center post of buckling, and the rotating disc of starter motor drive rotates until the reinforcing bar is near buckling the center post, and the backing pin rotates thereupon, with reinforcing bar bending type.

The utility model has the advantages that:

1. the metal gasket with the rough surface is arranged on the surface, which is in contact with the steel bar, of the limiting plate, and the friction coefficient is larger due to the rough metal surface, so that the friction force between the steel bar and the metal gasket is larger, the steel bar is not easy to displace in the bending process, and the bending precision of the steel bar is higher; and when the metal gasket is seriously worn, the metal gasket is more convenient to replace and has low replacement cost.

2. Through sliding connection fixing device on the limiting plate, the relative position of adjustment fixing device and first limiting plate can be fixed with the reinforcing bar, takes place the displacement when further preventing its bending, makes the bending process of reinforcing bar more stable.

Further, still include second stop gear, second stop gear includes second limiting plate and second fixing device, and second limiting plate fixed mounting is on the operation panel, and a second limiting plate side is on the coplanar with the generating line of the center post of buckling, and second fixing device slidable mounting is on the limiting plate, and second fixing device can the fixed steel bar position.

The first limiting mechanism can be used for reversely bending and straightening the bent steel bar by changing the rotating direction of the rotating disc, but if the strength of the steel bar is overlarge, the steel bar generates overlarge reaction force on the fixing device, so that the fixing device is easily damaged; through setting up second stop gear, place the reinforcing bar that needs the reverse bending even between splint and limiting plate, make the ejector pin extension, first stop gear compresses tightly the reinforcing bar, and in the bending process, the reaction force effect that the reinforcing bar produced can protect fixing device not to damage on the limiting plate to the reverse bending effect of flare-outing is better.

Further, the equal threaded connection in upper surface of first limiting plate and second limiting plate has the back shaft, first fixing device and second fixing device all include upper plate and curb plate, and two curb plates are parallel with the side of first limiting plate and second limiting plate respectively, have all opened the spout on two upper plates, and two back shafts respectively with the spout sliding connection that corresponds, be located the outer threaded connection on the back shaft of spout and have the nut.

Through setting up spout and back shaft on the upper plate, make fixing device can slide on the perpendicular to limiting plate length direction, can adjust the distance between curb plate and the spacing according to the size adjustment of reinforcing bar, during the adjustment with the nut unscrew slip upper plate adjust to fixed position, again with the nut screw up can, easy operation and fixed reinforcing bar position are effectual.

Further, the first fixing device and the second fixing device further comprise tightening screws, and the tightening screws are installed on the upper plate in a threaded mode.

The jacking screw can fix the position of the steel bar in the vertical direction, so that the steel bar can be prevented from moving, and the screw can be moved in the vertical direction by rotating the screw during operation.

Further, first stop gear still includes the connecting block, and connecting block and first stopper fixed connection open on the connecting block has the spout, and sliding connection has the sliding shaft in the spout, and the sliding shaft is articulated with the ejector pin.

Furthermore, the jacking mechanism further comprises a support frame and a handle, the ejector rod is in threaded connection with the support frame, the handle is fixedly connected to one end, far away from the bent central column, of the ejector rod, and the ejector rod can be close to or far away from the bent central column by rotating the handle.

The operation is simple, and the handle is rotated to enable the ejector rod to be close to or far away from the bent central column to achieve the purpose of tightly ejecting the reinforcing steel bar.

Furthermore, the operating platform is fixedly connected with a fixing block, and the first limiting mechanism and the second limiting mechanism are both installed on the fixing block.

Furthermore, a plurality of mounting holes are formed in the rotary disc, and the mounting holes are axially and uniformly distributed in the rotary disc by taking the central column as a circle center.

The appropriate mounting hole mounting stop pin can be selected according to the concrete size of the steel bar for bending, so that the bending precision is improved, and the application range of the steel bar bending tester is expanded.

Furthermore, the operating platform is fixedly connected with a containing seat, the containing seat is provided with a placing hole, and the placing hole is used for placing the stop pin.

The stop pin is convenient to store and is prevented from being lost.

Furthermore, the metal gasket is processed by notching high-hardness steel sheets.

Because bending test's reinforcing bar is mostly the ribbed reinforcing bar, behind the metal gasket surface grooving, can increase the area of contact of reinforcing bar and metal gasket, prevent bending in-process reinforcing bar displacement.

Drawings

Fig. 1 is a top view of an embodiment of the present invention.

Fig. 2 is a schematic perspective view of an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises an operating platform 1, a rotating disc 2, a jacking mechanism 3, a first limiting mechanism 4, a second limiting mechanism 5, a stop pin 6, a fixing block 11, a containing seat 12, a bending central column 21, a mounting hole 22, an ejector rod 31, a supporting frame 32, a handle 33, a first limiting plate 41, a metal sheet 42, a first fixing device 43, a supporting shaft 44, a jacking screw 45, a connecting block 46, a sliding shaft 47, a second limiting plate 51, a second fixing device 52, a supporting shaft 53 and a jacking screw 54.

Embodiment, as shown in figures 1 and 2,

the utility model provides a reinforcing bar bending test machine, includes operation panel 1, rotating circular disc 2, the tight mechanism 3 in top, first stop gear 4, second stop gear 5, backing pin 6.

The rotary disc 2 is rotatably connected to the center of the upper surface of the operating platform 1, a bent central column 21 is welded to the center of the rotary disc 2, a plurality of mounting holes 22 are formed in the rotary disc 2, the mounting holes 22 are uniformly distributed in the circumferential direction around the circle center of the rotary disc 2, and the stop pins 6 can be just mounted in the mounting holes 22.

The welding has fixed block 11 and storage holder 12 on operation panel 1, and fixed block 11 is located 2 rear sides of rotating disc, and storage holder 12 is located 2 right sides of rotating disc, and storage holder 12 is opened has a plurality of holes of placing, places the hole and is used for placing backing pin 6.

The jacking mechanism 3 is located on the left side of the rotating disc 2 and comprises a push rod 31, a support frame 32 and a handle 33, the support frame 32 is fixed on the upper surface of the operating platform 1, the push rod 31 is in threaded connection with the inside of the support frame 32, the handle is installed at the left end of the push rod, and the handle 33 is rotated to enable the push rod 31 to extend or shorten towards the direction of the rotating disc 2.

The first limiting mechanism 4 comprises a first limiting plate 41, a metal gasket 42, a first fixing device 43, a supporting shaft 44, a jacking screw 45, a connecting block 46 and a sliding shaft 47, one end of the first limiting plate 41 is hinged to the left side of the fixing plate 11, the right side of the other end of the first limiting plate 41 faces the bent central column 21, the left side of the first limiting plate 41 is in threaded connection with the connecting block 46, a sliding groove is formed in the connecting block 46, the sliding shaft 47 is in sliding connection with the sliding groove, and the sliding shaft 47 is hinged to the ejector rod 31; the metal gasket 42 is installed on the side surface of the limiting block 41 in a threaded manner, and the metal gasket 42 is processed by high-hardness steel plate grooving; the first fixing device 43 comprises an upper plate and a side plate, the upper plate is perpendicular to the length direction of the first limiting plate 41, the side plate is located on the right side of the first limiting plate 41 and is parallel to the right side face of the first limiting plate 41, and the upper plate is provided with a sliding groove and a threaded hole; the supporting shaft 44 is in threaded connection with the upper surface of the first limiting plate 41, the supporting shaft 44 is in sliding connection with the sliding chute, a nut is in threaded connection with the supporting shaft 44 outside the sliding chute, and the nut can be rotated to control whether the sliding chute and the supporting shaft 44 can slide relatively or not, so that the distance between the side plate of the first fixing device 43 and the right side surface of the first limiting plate 41 is adjusted; the tightening screw 45 is in threaded fit with the threaded hole of the upper plate, the length of the tightening screw 45 is larger than the sum of the height of the first limiting plate 41 and the thickness of the upper plate of the first fixing device 43, and the tightening screw 45 can be screwed to be close to or far away from the steel bar, so that the steel bar can be tightened or loosened.

The second limiting mechanism 5 comprises a second limiting plate 51, a second fixing device 52, a supporting shaft 53 and a jacking screw 54, one end of the second limiting plate 51 is in threaded connection with the right end of the fixing block 11, the other end of the second limiting plate 51 faces the bent central column 21, and the left side face of the second limiting plate 51 and a bus of the bent central column 21 are on the same plane; the second fixing device 52 comprises an upper plate and a side plate, the upper plate is perpendicular to the length direction of the second limiting plate 51, the side plate is positioned on the left side of the second limiting plate 51 and is parallel to the left side of the limiting plate, and the upper plate is provided with a sliding groove and a threaded hole; the supporting shaft 53 is in threaded connection with the upper surface of the second limiting plate 51, the supporting shaft 53 is in sliding connection with the sliding chute, a nut is in threaded connection with the supporting shaft 53 outside the sliding chute, and the nut can be rotated to control whether the sliding chute and the supporting shaft 53 can slide relatively or not, so that the distance between the side plate of the second fixing device 52 and the second limiting plate 51 is adjusted; the tightening screw 54 is in threaded fit with the threaded hole of the upper plate, the length of the tightening screw 54 is greater than the sum of the height of the second limiting plate 51 and the thickness of the upper plate of the second fixing device 52, and the tightening screw 54 can be screwed to be close to or far away from the steel bar, so that the steel bar can be tightened or loosened.

The specific implementation is as follows:

when the reinforcing steel bar needs to be bent, clamping the reinforcing steel bar by using the jacking mechanism 3 and the first limiting mechanism 4, inserting the reinforcing steel bar to be bent between a side plate of the first fixing device 43 and the first limiting plate 41, installing the stop pin 6 in a proper installation hole 22 of the rotating disc 2, enabling the stop pin 6 to be positioned on the left side of the front end of the reinforcing steel bar, rotating the handle 33, enabling the ejector rod 31 to move towards the right side, enabling the ejector rod 31 to drive the sliding shaft 47 to slide in the sliding groove of the connecting block 46, enabling the first limiting plate 41 to move towards the bent central column 21 until the reinforcing steel bar is in surface contact with the bent central column 21, and stopping rotating the handle 33; then, the first fixing device 43 is pushed, so that the side plate of the first fixing device and the metal gasket 42 on the right side surface of the first limit plate 41 are in full contact with the surface of the steel bar, after the steel bar is clamped, the nut on the support shaft 44 is screwed, and the position of the first fixing device 43 is fixed; then the screw 45 is screwed to contact and prop against the surface of the steel bar; after the steel bar is firmly positioned, the driving motor is started, the rotating disc 2 rotates clockwise according to a preselected set angle, and the stop pin 6 pushes the front end of the steel bar to bend the center column 21 around the bending center; after the steel bar is bent in place, the driving motor is turned off, the rotating disc 2 stops rotating, the ejector rod 31 is moved to the left side by the rotating handle 33, the first limiting plate 41 is driven to move towards the direction away from the bent central column 21, the tightening screw 45 is rotated upwards to be away from the surface of the steel bar, the nut on the supporting shaft 44 is loosened, the side plate of the first fixing device 43 moves towards the right side to loosen the steel bar, and then the steel bar is taken out.

When the bent reinforcing steel bar needs to be reversely straightened, if the strength of the reinforcing steel bar is low, the jacking mechanism 3 and the first limiting mechanism 4 can be directly used for finishing the reverse straightening work; inserting the reinforcing steel bar between the side plate of the first fixing device 43 and the first limiting plate 41, installing the stop pin 6 in a proper installation hole 22 of the rotating disc 2 to enable the stop pin 6 to be positioned at the right side of the front end of the reinforcing steel bar, adjusting the first limiting mechanism 4, the first fixing device 43 and the tightening screw 45 to fix the position of the reinforcing steel bar, and the adjustment operation is the same as the above; after the steel bar is firmly positioned, a driving motor is started, the rotating disc 2 rotates anticlockwise according to a preset angle, the stop pin 6 pushes the front end of the steel bar, and the center column is straightened reversely around the bending center column; after straightening, the driving motor is closed, and the reinforcing steel bars are taken out, wherein the taking-out operation is the same as the above operation.

If a reinforcing steel bar with high strength needs to be reversely straightened, the jacking mechanism 3, the first limiting mechanism 4 and the second limiting mechanism 5 need to be used at the same time, the reinforcing steel bar is inserted between the second limiting plate 51 of the second limiting mechanism 5 and the side plate of the second fixing device 52, and the stop pin 6 is installed in a proper installation hole 22 of the rotary disc 2, so that the stop pin 6 is positioned on the right side of the front section of the reinforcing steel bar; then, the clamping plate 51 is pushed to enable the left side surfaces of the side plates and the second limiting plate 51 to be fully contacted with the surface of the steel bar, the nut at the top end of the supporting shaft 53 is screwed to fix the second fixing device 52, and the screwing screw 54 is screwed downwards to enable the screwing screw to tightly support the surface of the steel bar; then the handle 33 is rotated to enable the mandril 51 to move towards the right side, and the first limiting plate 41 of the first limiting mechanism 4 is pushed to approach and press the reinforcing steel bars; after the steel bar is firmly positioned, a driving motor is started, the rotating disc 2 rotates anticlockwise according to a preset angle, the stop pin 6 pushes the front end of the steel bar, and the center column is straightened reversely around the bending center column; after straightening, the driving motor is turned off, the jacking mechanism 3, the first positioning mechanism 4, the clamping plate 53 and the tightening screw 54 are adjusted to loosen the steel bars, and the steel bars are taken out after the adjustment operation is the same as the above.

The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A steel bar bending tester comprises an operation table, a rotating disc, a stop pin, a jacking mechanism and a first limiting mechanism, and is characterized in that the rotating disc is rotatably arranged on the operation table, a bent central column is arranged at the center of the rotating disc, and a mounting hole is formed in the rotating disc; the jacking mechanism is arranged on the operating platform and comprises a mandril, and the mandril can be close to or far away from the bent central column; first stop gear includes first limiting plate and first fixing device, and first limiting plate one end is connected with the ejector pin, and the first limiting plate other end is articulated with the operation panel, and first limiting plate is located the ejector pin and buckles between the center post, and first limiting plate is equipped with rough surface's metal gasket towards the side of buckling the center post, and first fixing device slidable mounting is on the limiting plate, and first fixing device can the fixed steel bar position.

2. The steel bar bending tester as claimed in claim 1, further comprising a second limiting mechanism, wherein the second limiting mechanism comprises a second limiting plate and a second fixing device, the second limiting plate is fixedly installed on the operating platform, one side face of the second limiting plate is located on the same plane as a bus of the bending center column, the second fixing device is slidably installed on the second limiting plate, and the second fixing device can fix the position of the steel bar.

3. The steel bar bending tester of claim 2, wherein the upper surfaces of the first and second limiting plates are respectively in threaded connection with a supporting shaft, the first and second fixing devices respectively comprise an upper plate and side plates, the two side plates are respectively parallel to the side surfaces of the first and second limiting plates, sliding grooves are respectively formed in the two upper plates, the two supporting shafts are respectively in sliding connection with the corresponding sliding grooves, and nuts are in threaded connection with the supporting shafts outside the sliding grooves.

4. The steel bar bending tester according to claim 3, wherein the first fixing means and the second fixing means further comprise tightening screws, and the tightening screws are threadedly mounted on the upper plate.

5. The steel bar bending tester according to claim 4, wherein the first limiting mechanism further comprises a connecting block, the connecting block is fixedly connected with the first limiting block, a sliding groove is formed in the connecting block, a sliding shaft is slidably connected in the sliding groove, and the sliding shaft is hinged to the ejector rod.

6. The steel bar bending tester as claimed in claim 5, wherein the tightening mechanism further comprises a support frame and a handle, the push rod is in threaded connection with the support frame, the handle is fixedly connected to one end of the push rod away from the bent central column, and the push rod can be close to or away from the bent central column by rotating the handle.

7. The steel bar bending tester according to claim 6, wherein a fixed block is fixedly connected to the operating table, and the first and second limiting mechanisms are mounted on the fixed block.

8. The steel bar bending tester as claimed in claim 7, wherein the rotating disk has a plurality of mounting holes, and the plurality of mounting holes are axially and uniformly distributed on the rotating disk by taking the central column as a circle center.

9. The steel bar bending tester according to claim 8, wherein a receiving seat is fixedly connected to the operating platform, and a placing hole is formed in the receiving seat and used for placing the stop pin.

10. The steel bar bending tester according to claim 9, wherein the metal washer is grooved with a high hardness steel plate.