CN103143643B - 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 to the shape needing, 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 manual machinery formula.Numerical-control full-automatic hoop bender is easy to operate, but volume is large, expensive, is generally only applicable to heavy construction enterprise.And although 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, applicant, according to the practical experience of oneself, has researched and developed the pneumatic bending hoop device of stirrup bender, and this case produces thus.

Summary of the invention

The object of the invention is to overcome the defect 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:

The pneumatic bending hoop device of stirrup bender comprises: be fixedly mounted on the clamping device in frame, bending hoop device, cam gear; Multiple 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 in frame, upper grip is fixed on the front end of lever, on the correspondence position of upper and lower chuck, be provided with the circular arc cutaway with reinforcing bar external diameter adaptation, 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 in frame, the base bearing pin of clamping cylinder is connected to and clamps in frame, clamps frame and is fixed in frame 4;

Described cam gear comprises: cam, cylinder bar air valve, escape pipe, reducing motor, clutch, cam drive axle; Multi-disc cam is fixed on 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 cylinder just flexible once;

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

Hollow bending sleeve pipe is connected in 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 bending wheel, on fork, there is an oval hole, hold telescopic shaft and pass in and out therein, between bending wheel and telescopic shaft front end, there is the enough large spaces that hold that reinforcing bar passes;

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

Bending chain is round being engaged on more than half sprocket wheel, and one end of bending chain is fixed on a tooth of sprocket wheel, and the other end bearing pin that bending chain dangles is connected to stroke adjustment and puts, and stroke adjustment external threading is connected on the piston rod of bending cylinder; Bending sleeve pipe rear end is also around half-turn reset chain, and one end of reset chain is fixed in the back end circumference of bending sleeve pipe, and the reset chain other end has been fixed extension spring, and one end of extension spring is fixed in 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, in reducing manufacturing cost, 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 the large or backwoodsman building industry of middle-grade scale, mobility and use.

Brief description of the drawings

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

Fig. 2 is clamping device schematic diagram;

Fig. 3 is 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-D line in Fig. 5;

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

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 chains, 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.

Detailed description of the invention

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

Embodiment 1

The structure of pneumatic type stirrup bender, as shown in Fig. 1-Fig. 6, mainly comprises 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 in frame 11, upper grip 14 is fixed on the front end of lever 13, on the correspondence position of upper and lower chuck, be provided with the circular arc cutaway that grips reinforcing bar, 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 in frame 11, and lever 13 can swing around bearing pin; The base bearing pin of clamping cylinder 12 is connected to and clamps in frame 11, and in the time that lever 13 swings, 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 to clamp action more smooth and easy reliable; Clamping frame 11 is fixed in frame 4; When piston rod 121 is down when contracting, on the front end of lever 13, to lift up, upper grip 14 leaves lower chuck 15, allows reinforcing bar to enter circular arc cutaway; In the time that piston rod 121 protrudes upward, the front end of lever 13 presses down, and upper and lower chuck 14 and 15 is just tightly clamped the reinforcing bar 5 that is arranged in circular arc cutaway, is 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, by this open cylinder that cylinder bar air valve 32 controls just flexible once.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, reset chain 24, extension spring 25, telescopic cylinder 26, bending cylinder 27, sprocket wheel 28, stroke adjustment cover 29;

Hollow bending sleeve pipe 21 is connected in 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 one end bearing pins have connected bending wheel 212, on fork 211, there is an oval hole, hold telescopic shaft 22 and pass in and out therein, between bending wheel 212 and telescopic shaft 22 front ends, there is the enough large spaces that hold that reinforcing bar 5 passes;

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

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, bending sleeve pipe 21 rear ends are also around half-turn reset chain 24, and one end of reset chain 24 is fixed in the back end circumference of bending sleeve pipe 21, and reset chain 24 other ends have been fixed extension spring 25, and the other end of extension spring 25 is fixed in frame 4, when the piston rod of bending cylinder 27 is during toward retrude, piston rod overlaps 29 by stroke adjustment, bending chain 23, sprocket wheel 28 rotates bending sleeve pipe 21, the bending sleeve pipe 21 of rotation makes vertical fork 211 turn over certain angle, bending chain 23 will ensure that around length sprocket wheel 28 can the above corner of Rotate 180 degree on sprocket wheel 28, adjust stroke adjustment and overlap 29 the screw threads degree of depth being screwed into and the stroke that regulates bending cylinder 27 piston rods, can control the angle of reinforcing bar 5 bendings, under limiting case, in the time that fork rotation 270 is spent, reinforcing bar is spent by bending 180, general conventional bending angle 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 past reinforcing bar 5, under the cooperation of telescopic shaft 22, implement bending, in Forging Process, the rotation of bending sleeve pipe 21 more on axle, has been elongated the extension spring 25 that is connected to reset chain 24 rear ends reset chain 24, complete after bending operation, the piston rod of bending cylinder 27 up resets immediately, and under the effect of extension spring 25, bending sleeve pipe 21 counter-rotates, and makes fork 211 be returned to vertical position, the armed state before 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.

We launch to describe by reinforcing steel bar hoop bending process below, are 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 in 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 is laterally shelved on the telescopic shaft of five bending hoop devices 2, and (in order to save map sheet, reinforcing bar two ends in Fig. 1 are by bending) the upper and lower chuck 14 and 15 by clamping device 1 grip and be 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 is fully retracted, bending hoop device 2D carries out bending hoop at once;

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

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

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

Claims (1)

1. a pneumatic bending hoop device for stirrup bender, is characterized in that comprising: be fixedly mounted on the clamping device in frame, bending hoop device, cam gear; Multiple 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 in frame, upper grip is fixed on the front end of lever, on the correspondence position of upper and lower chuck, be provided with the circular arc cutaway with reinforcing bar external diameter adaptation, 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 in frame, the base bearing pin of clamping cylinder is connected to and clamps in frame, clamps frame and is fixed in frame;

Described cam gear comprises: cam, cylinder bar air valve, escape pipe, reducing motor, clutch, cam drive axle; Multi-disc cam is fixed on 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 one of this cylinder bar Air Valve Control or several cylinder just flexible once;

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

Hollow bending sleeve pipe is connected in 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 bending wheel, on fork, there is an oval hole, hold telescopic shaft and pass in and out therein, between bending wheel and telescopic shaft front end, there is the enough large spaces that hold that reinforcing bar passes;

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

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