CN103143643A - Pneumatic hoop bending device for steel bar hoop bending machine - Google Patents

Abstract

A pneumatic hoop bending device for a steel bar hoop bending machine comprises a clamping device, a plurality of hoop bending device parts and a cam gear, wherein the hoop bending device parts are arrayed and arranged transversely; the rear end of a lever of the clamping device is in pin connection with a clamping cylinder; the middle of the lever is in pin connection with a clamping rack; a base of the clamping cylinder is in pin connection with the clamping rack; a plurality of cams of the cam gear are fixed on a cam drive shaft; when each cam rotates by a cycle, each cylinder opening rod air valve is opened once, and the cylinder controlled by the cylinder rod air valve extends and contracts once; chain wheels are fixed at middle sections of hollow rotating shafts of the hoop bending device parts; oscillating rods are fixed at the front ends of the rotating shafts; a pin shaft at one end of each oscillating rod is connected with a bending wheel; circular waist holes in the oscillating rods accommodate telescopic shafts to pass in and out; the telescopic shafts slide in cavities of the rotating shafts; bending chains drive the chain wheels to rotate; the bending wheels on the oscillating rods bend steel bars downwards; and after the steel bars are bent, return chains pull the bending wheels to vertical positions. The pneumatic hoop bending device has the benefits that of simple structure, small size, good product precision and high yield.

Description

The pneumatic bending hoop device of stirrup bender

Technical field

The present invention relates to the steel bar processing machinery field of building trade, be specifically related to a kind of pneumatic bending hoop device of stirrup bender.

Background technology

Stirrup bender is that stirrup for building is curved the shape that needs, and has generally comprised feeding clip mechanism, hoop bending body, automatic controls.

Stirrup bender in the market mainly divides two kinds, and a kind of is numerical-control full-automatic, and another kind is the manual machinery formula.The numerical-control full-automatic hoop bender is easy to operate, but volume is large, and is expensive, generally is only applicable to heavy construction enterprise.Although and the hoop bender low price of manual machinery formula operates debugging too complicated, inefficiency, precision is low, and homogeneity of product is poor, and noise is very large.

Our company furthers investigate two kinds of mainstream models on market, think that bar straightening mechanism, feed mechanism, the shearing mechanism of prior art are fairly simple and ripe, the structure of each producer is similar, but that crucial hoop bending body lacks is simple and reliable, low cost of manufacture, type that production efficiency is high, Given this, the applicant has researched and developed the pneumatic bending hoop device of stirrup bender according to the practical experience of oneself, and this case produces thus.

Summary of the invention

The object of the invention is to overcome the defective of above-mentioned prior art, a kind of pneumatic bending hoop device of stirrup bender is provided.

To achieve these goals, technical scheme of the present invention is as follows:

A kind of pneumatic bending hoop device of stirrup bender comprises: be fixedly mounted on the clamping device on frame, bending hoop device, cam gear; A plurality of bending hoop device lateral arranged in arrays;

Described clamping device comprises: clamp frame, clamping cylinder, piston rod, lever, upper grip, lower chuck; Lower chuck is fixedly mounted on and clamps on frame, upper grip is fixed on the front end of lever, be provided with the circular arc cutaway adaptive with the reinforcing bar external diameter on the correspondence position of upper and lower chuck, the rear end bearing pin of lever is connected to the piston rod top of clamping cylinder, the middle part bearing pin of lever is connected to and clamps on frame, the base bearing pin of clamping cylinder is connected to and clamps on frame, clamps frame and is fixed on frame 4;

Described cam gear comprises: cam, cylinder bar air valve, escape pipe, reducing motor, clutch, cam drive axle; The multi-disc cam is fixed on the cam drive axle, has fixed a cylinder bar air valve on the correspondence position of every cam, and the escape pipe of cylinder bar air valve is connecting respectively one group of cylinder; Each cam rotates a circle, and opens cylinder bar air valve once, by this open 1 of cylinder bar Air Valve Control or several cylinders just flexible once;

Described bending hoop device comprises: bending sleeve pipe, fork, bending wheel, telescopic shaft, bending chain, the chain that resets, extension spring, telescopic cylinder, bending cylinder, sprocket wheel, stroke adjustment cover;

Hollow bending sleeve pipe is connected on frame by front and back bearings, sprocket wheel has been fixed in the stage casing of bending sleeve pipe, bending sleeve pipe front end has been fixed fork, fork one end bearing pin has connected the bending wheel, one oval hole is arranged on fork, hold telescopic shaft and pass in and out therein, have the enough large spaces that hold that reinforcing bar passes between bending wheel and telescopic shaft front end;

Telescopic shaft and hollow bending sleeve pipe coaxial line are installed, and the telescopic shaft rear end has connected telescopic cylinder, can slide in the cavity of bending sleeve pipe;

The bending chain is round being engaged on more than half sprocket wheel, and an end of bending chain is fixed on a tooth of sprocket wheel, and the other end bearing pin that the bending chain dangles is connected to stroke adjustment and puts, and the stroke adjustment external threading is connected on the piston rod of bending cylinder; Also around the half-turn chain that resets, an end of the chain that resets is fixed on the back end circumference of bending sleeve pipe in bending sleeve pipe rear end, and the chain other end that resets has been fixed extension spring, and an end of extension spring is fixed on frame.

The invention has the beneficial effects as follows: volume simple in structure is little, and automaticity is high, and Product Precision is high, and output is high, and noise is little, when reducing manufacturing cost, has widened the range of application of many specifications, multi-assortment production.A kind of cheap and good-quality middle-grade product,, be specially adapted to middle-grade scale, mobility is large or backwoodsman building industry is used.

Description of drawings

Fig. 1 is general assembly schematic diagram of the present invention;

Fig. 2 is the clamping device schematic diagram;

Fig. 3 is the cam gear schematic diagram;

Fig. 4 is bending hoop device installation diagram;

Fig. 5 is bending hoop device front view;

Fig. 6 is the cutaway view along D in Fig. 5-D line;

Fig. 7 is the equipment state figure after the bending hoop finished product is completed.

Reference numeral:

1 clamping device,

11 clamp frame, 12 clamping cylinders, 121 piston rods, 13 levers, 14 upper grips, 15 lower chucks;

2 bending hoop devices (from left to right, sequence number is respectively 2A, 2B, 2C, 2D, 2E)

21 bending sleeve pipes, 211 forks, 212 bending wheels, 22 telescopic shafts, 23 bending chains, 24 reset chain, 25 extension springs, 26 telescopic cylinders, 27 bending cylinders, 28 sprocket wheels, 29 stroke adjustment covers;

3 cam gears

31 cams, 32 cylinder bar air valves, 321 tracheaes, 33 reducing motors, 34 clutches, 35 cam drive axles;

4 frames; 5 reinforcing bars.

The specific embodiment

 

Below by embodiment and accompanying drawing, the present invention is further elaborated.

Embodiment 1

The structure of pneumatic type stirrup bender such as Fig. 1-shown in Figure 6, mainly comprise clamping device 1, cam gear 3, bending hoop device 2.

Referring to accompanying drawing 2, clamping device 2 comprises: clamp frame 11, clamping cylinder 12, piston rod 121, lever 13, upper grip 14, lower chuck 15; Lower chuck 15 is fixedly mounted on and clamps on frame 11, upper grip 14 is fixed on the front end of lever 13, be provided with the circular arc cutaway that grips reinforcing bar on the correspondence position of upper and lower chuck, the rear end bearing pin of lever 13 is connected to piston rod 121 tops of clamping cylinder 12, the middle part bearing pin of lever 13 is connected to and clamps on frame 11, and lever 13 can swing around bearing pin; The base bearing pin of clamping cylinder 12 is connected to and clamps on frame 11, and when lever 13 swung, clamping cylinder 12 also can swing, and makes the piston rod of clamping cylinder 12 when flexible, automatically adjusts the application of force angle to lever 13, makes the clamping action more smooth and easy reliable; Clamping frame 11 is fixed on frame 4; , lift up on the front end of lever 13 down during contracting when piston rod 121, upper grip 14 leaves lower chuck 15, allows reinforcing bar to enter circular arc cutaway; When piston rod 121 protruded upward, the front end of lever 13 pressed down, and upper and lower chuck 14 and 15 is just tightly clamped the reinforcing bar 5 that is arranged in circular arc cutaway, was convenient to the smooth work of bending hoop device.

Referring to Fig. 3, cam gear 3 comprises: cam 31, cylinder bar air valve 32, escape pipe 321, reducing motor 33, clutch 34, cam drive axle 35; Multi-disc cam 31 is fixed on cam drive axle 35, has fixed a cylinder bar air valve 32 on the correspondence position of every cam 31, and the escape pipe 321 of cylinder bar air valve 32 is connecting respectively one or several cylinder; Each cam 31 rotates a circle, and opens cylinder bar air valve 32 once, is just stretched once by this cylinder that opens 32 controls of cylinder bar air valve.Cam gear 3 is controlling organizations of bending hoop device 2, due to the difference of cam 31 control cylinders and the difference of cam 31 contour shapes, each cylinder piston rod can stretch and keep constant pressure within the time of setting in the different time by setting technological requirement.

Referring to Fig. 4-6, bending hoop device 2 comprises: bending sleeve pipe 21, fork 211, bending wheel 212, telescopic shaft 22, bending chain 23, the chain 24 that resets, extension spring 25, telescopic cylinder 26, bending cylinder 27, sprocket wheel 28, stroke adjustment cover 29;

Hollow bending sleeve pipe 21 is connected on frame 4 by front and back bearings, sprocket wheel 28 has been fixed in the centre of bending sleeve pipe 2, bending sleeve pipe 26 front ends have been fixed fork 211, fork 211 1 end bearing pins have connected bending wheel 212, one oval hole is arranged on fork 211, hold telescopic shaft 22 and pass in and out therein, have the enough large spaces that hold that reinforcing bar 5 passes between bending wheel 212 and telescopic shaft 22 front ends;

Telescopic shaft 22 and hollow bending sleeve pipe 21 coaxial lines are installed, and telescopic shaft 22 has connected telescopic cylinder 26, can slide in the cavity of bending sleeve pipe 21;

bending chain 23 is round being engaged on more than half sprocket wheel 28, one end of bending chain 23 is fixed on a tooth of sprocket wheel 28, the other end bearing pin that bending chain 23 dangles is connected on stroke adjustment cover 29, and stroke adjustment cover 29 is threaded on the piston rod of bending cylinder 27, also around the half-turn chain 24 that resets, an end of the chain 24 that resets is fixed on the back end circumference of bending sleeve pipe 21 in bending sleeve pipe 21 rear ends, and chain 24 other ends that reset have been fixed extension spring 25, and the other end of extension spring 25 is fixed on frame 4, when the piston rod of bending cylinder 27 during toward retrude, piston rod overlaps 29 by stroke adjustment, bending chain 23, sprocket wheel 28 makes 21 rotations of bending sleeve pipe, the bending sleeve pipe 21 of rotation makes vertical fork 211 turn over certain angle, bending chain 23 will guarantee that around length sprocket wheel 28 can the above corners of Rotate 180 degree on sprocket wheel 28, adjust stroke adjustment cover 29 the screw threads degree of depth that is screwed into and the stroke of regulating bending cylinder 27 piston rods, can control the angle of reinforcing bar 5 bendings, under limiting case, when fork rotation 270 is spent, reinforcing bar is spent by bending 180, general bending angle commonly used is 90 degree and 135 degree, the rotation of bending sleeve pipe 21 and fork 211, the bending wheel 212 of pin joint on fork 211 pressed down reinforcing bar 5 is past, implement bending under the cooperation of telescopic shaft 22, in Forging Process, the rotation of bending sleeve pipe 21 has elongated resetting chain 24 more on axle the extension spring 25 that is connected to chain 24 rear ends that reset, after completing the bending operation, the piston rod of bending cylinder 27 up resets immediately, and under the effect of extension spring 25,21 reverse rotations of bending sleeve pipe make fork 211 be returned to vertical position, is in the front armed state of next bending circulation, the piston rod of simultaneous retractable cylinder 26 pulls telescopic shaft 22 to draw back, and makes in the oval hole of its indentation fork 211, allows other bending hoop device 2 devote oneself to work or to allow finished product fall.

Below we launch to describe by the reinforcing steel bar hoop bending process, be convenient to those skilled in the art and sharpen understanding:

Referring to accompanying drawing 1, we are according to the length of side of reinforcing steel bar hoop bending, and five bending hoop devices 2 parallel array on frame 4, we are its called after 2A, 2B, 2C, 2D, 2E, between them lateral separation determined the length of side of reinforcing steel bar hoop bending.Reinforcing bar 5 laterally is shelved on the telescopic shaft of five bending hoop devices 2, and the upper and lower chuck 14 and 15 of (in order to save map sheet, reinforcing bar two ends in Fig. 1 are by bending) and clamped device 1 grips and is fixed wtih.

The first step: bending hoop device 2A and 2E be bending hoop simultaneously, reinforcing bar 5 is bent into a font, as shown in Figure 1;

Second step: after the telescopic shaft 22 of bending hoop device 2E was fully retracted, bending hoop device 2D carried out bending hoop at once;

The 3rd step: after the telescopic shaft 22 of bending hoop device 2A and 2D was fully retracted, bending hoop device 2B, 2C carried out bending hoop at once; The finished product that bending hoop is completed as shown in Figure 7.

The 4th step: pneumatic gripping loosens, expansion link 22 indentations simultaneously of bending hoop device 2B, 2C, and the stirrup finished product falls.

Of the present invention simple in structure, reliable operation, the shape of reinforcing steel bar hoop bending is controlled flexibly, and easy to operate efficient is high, according to test, per minutely processes 20 reinforcing steel bar hoop bendings, and quality meets drawing requirement fully.

Claims (1)

1. the pneumatic bending hoop device of a stirrup bender, is characterized in that comprising: be fixedly mounted on the clamping device on frame, bending hoop device, cam gear; A plurality of bending hoop device lateral arranged in arrays;

Described clamping device comprises: clamp frame, clamping cylinder, piston rod, lever, upper grip, lower chuck; Lower chuck is fixedly mounted on and clamps on frame, upper grip is fixed on the front end of lever, be provided with the circular arc cutaway adaptive with the reinforcing bar external diameter on the correspondence position of upper and lower chuck, the rear end bearing pin of lever is connected to the piston rod top of clamping cylinder, the middle part bearing pin of lever is connected to and clamps on frame, the base bearing pin of clamping cylinder is connected to and clamps on frame, clamps frame and is fixed on frame;

Described cam gear comprises: cam, cylinder bar air valve, escape pipe, reducing motor, clutch, cam drive axle; The multi-disc cam is fixed on the cam drive axle, has fixed a cylinder bar air valve on the correspondence position of every cam, and the escape pipe of each cylinder bar air valve is connecting respectively one group of cylinder; Each cam rotates a circle, and opens cylinder bar air valve once, by this open one of cylinder bar Air Valve Control or several cylinders just flexible once;

Described bending hoop device comprises: bending sleeve pipe, fork, bending wheel, telescopic shaft, bending chain, the chain that resets, extension spring, telescopic cylinder, bending cylinder, sprocket wheel, stroke adjustment cover;

Hollow bending sleeve pipe is connected on frame by front and back bearings, sprocket wheel has been fixed in the stage casing of bending sleeve pipe, bending sleeve pipe front end has been fixed fork, fork one end bearing pin has connected the bending wheel, one oval hole is arranged on fork, hold telescopic shaft and pass in and out therein, have the enough large spaces that hold that reinforcing bar passes between bending wheel and telescopic shaft front end;

Telescopic shaft and hollow bending sleeve pipe coaxial line are installed, and the telescopic shaft rear end has connected telescopic cylinder, can slide in the cavity of bending sleeve pipe;

The bending chain is round being engaged on more than half sprocket wheel, and an end of bending chain is fixed on a tooth of sprocket wheel, and the other end bearing pin that the bending chain dangles is connected to stroke adjustment and puts, and the stroke adjustment external threading is connected on the piston rod of bending cylinder; Also around the half-turn chain that resets, an end of the chain that resets is fixed on the back end circumference of bending sleeve pipe in bending sleeve pipe rear end, and the chain other end that resets has been fixed extension spring, and an end of extension spring is fixed on frame.

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