CN103752664A - Mechanical tube bending machine - Google Patents

Abstract

The invention discloses a mechanical tube bending machine which comprises a worktable. A small gear and a large gear are mounted on the worktable and engaged with each other, a fixed wheel is concentrically and fixedly arranged at the center of the large gear, movable wheels are arranged on two sides of the fixed wheel respectively, limiters are arranged at the tops of the outer sides of the movable wheels, a tube bypasses a gap among the fixed wheel and the movable wheels, an outlet end of the tube penetrates a pressing plate, the fixed wheel and the movable wheels are fixed to a connecting clamp plate, and the small gear is connected with a motor through a horizontal reducer and a vertical reducer. The tube bending machine is transmitted by the aid of a belt and machinery, molds are replaced and the positions of the movable wheels are adjusted at any time according to the diameter of the tube in the using process, and the tube bending machine is convenient to adjust and meets use requirements.

Description

Mechanical type bending machine

Technical field

The present invention relates to mechanical type bending machine.

Background technology

Tube bending process and general bending are similar, material outside tension, inner side pressurized, thereby outside tube wall attenuation, inner side tube wall thickening.When deflection is excessive, can ftracture in outside, and inner side can be wrinkling, and external force is cancelled rear generation resilience and caused tubular bending error etc.Generally, after tube bending, section shape is approximately oval, and when employing has mandrel bending, after tube bending, section shape changes little.

Summary of the invention

The object of this invention is to provide a kind of mechanical type bending machine, bending machine adopts band and machine driving, according to pipe diameter size mold exchange and adjust the position of driving wheel more at any time, easy to adjust in use procedure, meets instructions for use.

Technical scheme of the present invention is as follows:

Mechanical type bending machine, include workbench, intermeshing pinion, gear wheel are installed on workbench, gear wheel center is fixedly installed fixed wheel with one heart, and the both sides of fixed wheel are respectively equipped with driving wheel, overhead limited location device outside driving wheel, pipe is walked around the gap between fixed wheel, driving wheel, the pipe port of export is through pressing plate, and described fixed wheel, driving wheel are fixed on connecting cleat, and pinion is connected with motor by horizontal speed reducer, vertical speed reducer.

Loose joint bolt is installed on described stop, and loose joint bolt overhead is on pipe.

The present invention often runs into the equipment of this respects such as heat exchanger, pressure vessel in producing, while manufacturing, need carry out the bending of many specifications pipe, and production lot is large, and the duration is short.For accomplishing high efficiency, low cost, designed this equipment constantly perfect in process of production, possess high value of practical.The design of this complete equipment complete and come into operation after bring significant economic benefit, adopt for many years this cover instrument to save approximately more than 150,000 yuan of human cost, boost productivity and reach more than 50%, create productivity effect and approximately reach more than 5,000 ten thousand yuan.

Adopt motor that power is provided and adopt the transmissions such as two-stage worm reduction gear, gear train to slow down and improve output torque.Use adjustable limit switch to adjust, adopt many group bend pipe wheels to combine bending of plurality of specifications pipe, simple in structure, practical, easy operating, meet batch production requirements completely, applicability is outstanding, effectively raises production efficiency, has saved time and cost.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

The specific embodiment

Referring to accompanying drawing, mechanical type bending machine, include workbench 10, electric control switch 11, intermeshing pinion 8 is installed on workbench 10, gear wheel 5, gear wheel 5 centers are fixedly installed fixed wheel 7 with one heart, the both sides of fixed wheel 7 are respectively equipped with driving wheel 4, driving wheel 4 outside overhead limited location devices 3, pipe 1 is walked around fixed wheel 7, gap between driving wheel 4, pipe 1 port of export is through pressing plate 2, described fixed wheel, driving wheel is fixed on connecting cleat 6, pinion 8 passes through horizontal speed reducer, vertical speed reducer is connected with motor, loose joint bolt 9 is installed on stop, loose joint bolt 9 overheads are on pipe 1.

In actual production process, need to be as requested bent into various materials in the tube.Materials in the tube bend angle within 90 ° of-180 ° of scopes.Pipe is φ 57 × 3.5-φ 25 × 2 pipes, and material is 20.Have one, motor, rotating speed is 1440r/min simultaneously, and power output is 3KW.For solving the problems such as Manual pipe bending tool efficiency is low, quality is unstable, labour intensity is large, require according to actual conditions, the mechanical type bending machine of simplicity of design practicality, improves the quality of production and production efficiency.

2.2 operation principle

In order to reduce bending quality defect, this bending machine has been taked following structural measure: adopt movably sound wheel construction; Adopt combined type bend pipe wheel; According to shape designing mould size of wheel after pipe sizes bending; Adopt driving wheel movable with R size adjustment centre-to-centre spacing.By above-mentioned measure, the mass defect while effectively reducing tube bending.

The bending machine course of work, is placed on sound R wheel 4,7 intervalves by pipe, and pipe is fixed with pressing plate 2.After starting power switch, by band transmission, Motor torque is delivered on gear 8.Gear 8 engages driven gear 5 transmissions by gear, and R wheel 4 is fixed on the wheel shaft of gear wheel 5 together with connecting cleat 6,

2.3 relevant design are calculated

2.3.1 materials in the tube torque arithmetic

Pipe bends in process, and because material model differs, the sectional dimension of various materials in the tube is also different.With actual materials in the tube used in BENDING PROCESS, be of a size of example, carry out the calculating of bending moment of torsion.

The bending stressed F computing formula of materials in the tube $F=\frac{0.7{\mathrm{<figure-callout\; id="2"\; label="KBt"\; filenames="HDA0000412249980000011.png"\; state="\{\{state\}\}">KBt</figure-callout>}}^2\mathrm{Rm}}{r+t}\left(N\right)$

Wherein B-bool girth (materials in the tube perimeter of section) mm

Curved radius mm in r-bool

T-wall thickness mm σ

Rm-material bending strength

K-safety coefficient, gets 2.5

According to actual service condition, during bend pipe, pipe used is φ 45mm × 3.5mm, and material is 20.

Get B=365mm, r=115mm, t=3.5mm, Rm=410MPa

The bending stressed F of materials in the tube is

$F=\frac{0.7x2.5x365x{3.5}^{2}x410}{115+3.5}=27072.8\left(N\right)$

Module=8 that are connected with working shaft in this instrument, diameter is 176mm, so swan-neck required torque is:

M=F × D=27072.8 × 0.176=4764.8Nm, so safety.

Claims (2)

1. mechanical type bending machine, include workbench, it is characterized in that, intermeshing pinion, gear wheel are installed on workbench, and gear wheel center is fixedly installed fixed wheel with one heart, the both sides of fixed wheel are respectively equipped with driving wheel, overhead limited location device outside driving wheel, pipe is walked around the gap between fixed wheel, driving wheel, and the pipe port of export is through pressing plate, described fixed wheel, driving wheel are fixed on connecting cleat, and pinion is connected with motor by horizontal speed reducer, vertical speed reducer.

2. mechanical type bending machine according to claim 1, is characterized in that, loose joint bolt is installed on described stop, and loose joint bolt overhead is on pipe.

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