木材切削刀具多功能试验台进给机构设计毕业论文

 2021-04-07 04:04

摘 要

本文主要是进行木材刀具切削实验台进给系统的设计。

木材刀具切削试验台能模拟锯链的工作状态,有较宽的切削速度调节范围和进给速度调节范围。同时具有较大的传递扭矩,可以保证大节距高效率的锯链性能测定,同时测定锯链锯齿上切削力的三个方向分离,即主切削力,进给力和侧向力,进给机构的进给速度,驱动链轮的转矩转速,轴公路,锯链的锯切效率。本文主要对木材刀具切削试验台进给机构的方案、进给机构结构进行了详细设计。

其手摇进给系统与一般车床相似,由手轮、手轮轴、手轮轴齿轮、进给大齿轮及进给齿轮轴组成。手轮空套在手轮轴上,摇动时往前推手轮即可使手轮与轴结合,不摇时在回位弹簧力作用下自动脱开。手轮轴齿轮的模数为2.5,齿数为15,进给大齿轮的齿数为69。进给齿轮轴上的小齿轮与原车床相同,齿数13。这样,手摇一圈的进给量为25mm,既轻便速度又适中。

溜板箱的快速进给传动由电动机最终传至进给齿轮轴。安装在溜板箱左侧的电动机与轴通过联轴器连接,左端固定有主动锥齿轮。被动锥齿轮和滑动齿轮同轴连接,花键轴上空套着滑动齿轮,滑动齿轮的一端有拨叉槽,拨叉由挂挡手柄操纵以推动滑动齿轮在花键轴上滑动,从而使滑动齿轮和进给大齿轮实现啮合与脱开。当滑动齿轮与进给大齿轮啮合时,溜板箱就可由变频电机驱动实现自动进给。

关键词:进给系统;试验台;切削力

Design of feed mechanism of saw chain cutting test bench

ABSTRACT

This article mainly is carries on the wood cutting tool cutting experiment design of feed system.

Wood cutter cutting bench can simulate the working state of the saw chain, has a wide speed regulation range and cutting feed speed adjusting range. Have large transmission torque, at the same time can ensure the high efficiency of coarse pitch determination of saw chain performance, at the same time saw chain saw cutting force of the three directions, namely the main cutting force and feed force and lateral force. Feed speed of can feed mechanism, the drive sprocket rotation speed, torque shaft road, the cutting efficiency of the saw chain.Among them this paper cutting test-bed for wood cutting tool solutions of can feed mechanism, the structure of the feed mechanism has carried on the detailed design.

Its hand feeding system similar to the general lathe, hand by hand wheel, shaft, gear shaft gear and feed composition. Hands rested in hand on the shaft, push forward wheel when you shake hand wheel and the shaft, do not shake the return spring force under the action of automatic release.

Slip board box fast feed drive by the motor to feed gear shaft end. Installed in the slip board box on the right side of the motor shaft through a shaft coupling, the left fixed active bevel gear, passive spiral bevel gear and small gear is fixed on the short shaft, short axis by two ball bearings on the shell wall. Between pinion and gear meshing, the middle wheel fixed on the spline shaft, spline shaft in also an empty set of sliding gear, sliding gear fork slot at one end, fork was monopolized by the gear lever to promote the slides on the sliding gear in spline shaft, so that the sliding gear and feed big gear meshing with the release. When the sliding gear and feed big gear meshing, the slip board box can be driven by frequency conversion motor to realize automatic feed.The hand wheel shaft gear has a modulus of 2.5 and a number of teeth of 15, the number of teeth for the feed gear is 69. The pinion on the feed gear shaft has the same number of teeth of 13 as the original lathe. In this way, the hand-held feed is 25mm, both light and moderate.

The fast feed of Slip board box is driven by the motor to feed gear and finally conduct to the gear shaft. The motor mounted on the left side of the slide box is connected to the shaft via a coupling, which fixed on the left side is the active bevel gear. The passive bevel gear and the sliding gear are coaxially connected, over the spline shaft sets of the sliding gear. One end of the sliding gear has a fork groove, and the fork is manipulated by the stopper handle to urge the sliding gear to slide on the spline shaft, so that the sliding gear and the feed gear can be engaged and disengaged. When the sliding gear is engaged with the feed gear, slide box can be driven by the variable frequency motor to achieve automatic feed.

Key words:Feed system;Test bench;Cutting force

目 录

1 绪论………………………………………………………………………………………………………1

1.1 本文研究目的与意义……………………………………………………………………………1

1.2 国内外试验台发展现状…………………………………………………………………………1

1.2.1 国内试验台现状…………………………………………………………………………3

1.2.1 国外试验台现状…………………………………………………………………………4

1.3 试验台进给机构类型比较………………………………………………………………………5

2 试验台进给机构方案确定………………………………………………………………………………6

2.1 木材切削试验台进给系统的设计要求…………………………………………………………6

2.2 木材切削试验台进给系统整体设计方案确定…………………………………………………6

2.2.1 试验台进给机构的工作原理……………………………………………………………6

2.2.1 试验台进给机构设计与创新……………………………………………………………6

3 进给机构结构设计………………………………………………………………………………………8

3.1 进给结构设计……………………………………………………………………………………8

3.2 齿轮箱设计………………………………………………………………………………………9

3.3 驱动装置的设计…………………………………………………………………………………10

3.4 齿轮传动副的设计………………………………………………………………………………10

3.4.1 原始数据…………………………………………………………………………………11

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