CN203664421U - Actuating unit for mechanical pipe bender - Google Patents

Abstract

The utility model discloses an actuating unit for a mechanical pipe bender. The actuating unit comprises a pinion and a big gear, wherein the pinion and the big gear are meshed with each other, a fixed wheel is fixedly arranged at the center of the big gear in a concentric mode, movable wheels are arranged on the two sides of the fixed wheel respectively, the pinion is in transmission connection with a vertical decelerator, the vertical decelerator is connected with a horizontal decelerator through a coupler, and the horizontal decelerator is connected with a motor through a belt. Belt transmission and mechanism transmission are adopted by the pipe bender. In the using process, a die can be replaced and the positions of the movable wheels can be adjusted at any time according to the diameters of pipes, so that adjustment is convenient, and the using requirement is met.

Description

Mechanical type bending machine actuating unit

Technical field

The utility model relates to mechanical type bending machine actuating unit.

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.In the time that 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 in the time that employing has mandrel bending, after tube bending, section shape changes little.

Utility model content

The purpose of this utility model is to provide a kind of mechanical type bending machine actuating unit, and 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.

The technical solution of the utility model is as follows:

Mechanical type bending machine actuating unit, include intermeshing pinion, gear wheel are installed, gear wheel center is fixedly installed fixed wheel with one heart, the both sides of fixed wheel are respectively equipped with driving wheel, pinion drive is connected with vertical type speed reducer (change gear), vertical type speed reducer (change gear) is connected with Horizontal speed-reducer by shaft coupling, and Horizontal speed-reducer is connected with motor by belt.

The utility model often runs into the equipment of this respect 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, design 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.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Detailed description of the invention

Referring to accompanying drawing, mechanical type bending machine actuating unit, include intermeshing pinion 6, gear wheel 7 are installed, gear wheel 7 centers are fixedly installed fixed wheel 8 with one heart, the both sides of fixed wheel 8 are respectively equipped with driving wheel 9, pinion drive is connected with vertical type speed reducer (change gear), and vertical type speed reducer (change gear) is connected with Horizontal speed-reducer by shaft coupling, and Horizontal speed-reducer is connected with motor 1 by belt.

In actual production process, need as requested the various materials in the tube shown in bending.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 actuating unit 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,

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.Be of a size of example with actual materials in the tube used in BENDING PROCESS, carry out the calculating of bending moment of torsion.

The bending stressed F computing formula of materials in the tube $F=\frac{0.7\mathrm{KB}{t}^2\mathrm{Rm}}{r+t}\left(N\right)$

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, when 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 (1)

1. mechanical type bending machine actuating unit, include intermeshing pinion, gear wheel are installed, it is characterized in that, gear wheel center is fixedly installed fixed wheel with one heart, the both sides of fixed wheel are respectively equipped with driving wheel, pinion drive is connected with vertical type speed reducer (change gear), and vertical type speed reducer (change gear) is connected with Horizontal speed-reducer by shaft coupling, and Horizontal speed-reducer is connected with motor by belt.