CN103157855B

CN103157855B - A kind of self-tapping judgment means of tapping machine

Info

Publication number: CN103157855B
Application number: CN201310111261.6A
Authority: CN
Inventors: 谢光辉; 金敉娜; 谢金志
Original assignee: Chongqing College of Electronic Engineering
Current assignee: Chongqing College of Electronic Engineering
Priority date: 2013-04-02
Filing date: 2013-04-02
Publication date: 2016-12-28
Anticipated expiration: 2033-04-02
Also published as: CN103157855A

Abstract

The present invention designs a kind of tapping auxiliary device, self-tapping judgment means particularly to a kind of tapping machine, including bench drill, pulling force sensor, it is fixed on the cylinder of bench drill side, control the Programmable Logic Controller of cylinder action and be arranged on the sprocket wheel of bench drill gear shaft outboard end, also include the chain of a bar shaped, described chain one end is fixed and is engaged on sprocket wheel, the other end of chain and the fixing connection of pulling force sensor, the piston rod of this pulling force sensor and cylinder is fixing to be connected, it is provided with gag lever post on described sprocket wheel, the lower limit sensor corresponding with gag lever post it is provided with on bench drill, described lower limit sensor, pulling force sensor and cylinder are electrically connected with Programmable Logic Controller respectively；The invention have benefit that, production cost is low, energy consumption is little, automaticity is high.

Description

A kind of self-tapping judgment means of tapping machine

Technical field

The present invention relates to a kind of tapping auxiliary device, the self-tapping judgment means of a kind of tapping machine.

Background technology

For some five metals standard components and nonstandard finding endoporus tapping procedures, industry factories and miness are frequently with common tapping machine Manual operations completes, but this technique is highly inconvenient, and cost is high, efficiency is slow, especially for the part needing batch machining. For solving these problems, some self-tapping equipment realizing being automatically brought into operation progress into market and are extensively easily accepted by a user.Separately Outward, the energy-saving and emission-reduction policy proposed for response country, general bench drilling machine or old tapping machine are carried out the machine of the NC postprocessing transformation of the way or lifting There is wide popularizing application prospect in bed re-manufacturing technology, the automatic loading/unloading tapping machine Ying Xiangjie after changing a social system simultaneously or promoting Energy, NC postprocessing, environment friendly direction are developed.

At present, many times in order to cost-effective, or using common table to transfer carries out tapping, and general bench drilling machine includes processing Main shaft, drives the motor that machining spindle rotates, the handle of operation machining spindle, and wherein handle and machining spindle are by gear shaft even Connecing, the oldest tapping machine is to change the screw tap size on general bench drilling machine machining spindle, and operation handle is to being fixed on folder artificially Workpiece on tool carries out tapping, and the dynamics speed of tapping all leans on people's subjective judgment, does not the most possess auto-feed tapping and judgement is attacked The ability of silk dynamics, is intended to want to allow it be capable of self-tapping, increases automaticity, it is necessary to design one is applicable to commonly Bench drill, and the judgment means that low cost, self-tapping simple to operate are auxiliary.

Summary of the invention

The technical problem to be solved in the present invention is: provide the non-tapping of a kind of Tong Guo automatic decision based on general bench drilling machine and The self-tapping judgment means of two states of tapping.

In order to solve above-mentioned problem, the present invention provides the self-tapping judgment means of a kind of tapping machine, including bench drill, draws Force transducer, is fixed on the cylinder of bench drill side, controls the Programmable Logic Controller of cylinder action and is arranged on outside bench drill gear shaft The sprocket wheel of side, it is characterised in that: also include that the chain of a bar shaped, described chain one end are fixed and are engaged on sprocket wheel, chain The other end of bar and the fixing connection of pulling force sensor, the piston rod of this pulling force sensor and cylinder is fixing to be connected, on described sprocket wheel It is provided with gag lever post, bench drill is provided with the lower limit sensor corresponding with gag lever post, described lower limit sensor, pull sensing Device and cylinder are electrically connected with Programmable Logic Controller respectively.

The present invention can realize self-tapping function after configuring vibrating disk, automatic feed mechanism and fixture, and can be with other Automation equipment combination constitutes automatic production line, and the self-tapping judgment means of the present invention can be supported by the machining spindle of bench drill The power size living workpiece comes the non-tapping of automatic decision and two states of tapping, thus realizes the ability of uniform self-tapping, and This self-tapping judgment means low cost, good operability, reliability are high, be easily achieved.

The operation principle of the self-tapping judgment means of tapping machine is: cooperation vibrating disk, automatic feed mechanism and fixture, when Workpiece enters in fixture, Material Sensor detect that workpiece puts in place, and Controlled by Programmable Controller cylinders retract pulls chain, from And band movable sprocket rotates, the machining spindle fast downlink of the bench drill that chain wheel drive engages with its gear carries out tapping, when rotate When screw tap props up workpiece, pulling force sensor detects that the pulling force of chain raises suddenly, and this value of thrust is dynamically fed back to able to programme Controller also compares with setting value in programmable controller program, when it exceedes setting value, and Programmable Logic Controller time delay 0.4 second Allow screw tap shoot about workpiece half tooth, then send signal and control cylinder and reset rapidly and stretch out, no longer give machining spindle downward Power, owing to now screw tap has been shot about workpiece half tooth, and workpiece is fixed by tapping clamp, and screw tap can to workpiece certainly by engagement force Carry out uniform tapping mainly, sprocket wheel is provided with the lower limit sensor of detection machining spindle, when machining spindle reaches lower limit During position, reversion is exited.

In order to adapt to the processing of the workpiece of different length, being arranged in adjustable mounting seat, according to work of lower limit sensor The degree of depth of piece bores, can regulate mounting seat to adapt to the tapping depth of workpiece.

So that chain and sprocket wheel do not have slot phenomenon, described chain and the sprocket engagement number of teeth in motor process At least two teeth.

Accompanying drawing explanation

Fig. 1 is the structural representation of the self-tapping judgment means of the present embodiment tapping machine；

Fig. 2 is the partial enlarged drawing in Fig. 1 at A；

Fig. 3 is the control flow chart of the self-tapping judgment means of the present embodiment tapping machine.

Detailed description of the invention

With embodiment, technical solution of the present invention is further illustrated below in conjunction with the accompanying drawings:

The self-tapping judgment means of the tapping machine as shown in Fig. 1,2 and Fig. 3, including bench drill 1, is fixed on bench drill 1 side Cylinder 2, control cylinder 2 action and the Programmable Logic Controller 12 of workflow, the sprocket wheel linked with the machining spindle 6 of bench drill 1 5, this sprocket wheel 5 is provided with one end welding engagement chain 10, the other end of this chain 10 passes through pulling force sensor 3 and cylinder 2 Fixing connection, sprocket wheel 5 is provided with the gag lever post 11 of detection screw tap 7 lower limit, the bench drill 1 residing for sprocket wheel 5 is provided with adjustable Mounting seat is also provided with the lower limit sensor 4 coordinated with gag lever post 11, and described lower limit sensor 4, pulling force sensor 3 are gentle Cylinder 2 is electrically connected with Programmable Logic Controller 12 respectively.

Coordinating vibrating disk, automatic feed mechanism and fixture, in workpiece 8 enters fixture 9, Material Sensor detects workpiece 8 put in place, and Programmable Logic Controller 12 controls cylinder 2 and retracts and drive chain 10, so that sprocket wheel 5 drives the processing master in tapping machine Axle 6 fast downlink carries out tapping, when the screw tap 7 rotated props up workpiece 8, owing to being provided with pulling force in Programmable Logic Controller 12 program The setting value of setting value, the value of thrust on chain that at this moment pulling force sensor 3 detects, this value of thrust and Programmable Logic Controller 12 Relatively, when it exceedes setting value, Programmable Logic Controller 12 time delay 0.4 second, allow screw tap 7 shoot about workpiece 8 half tooth, then send out Go out signal to control cylinder 2 and resets rapidly and stretch out, no longer to the power that machining spindle 6 is downward.Owing to now workpiece 8 shot by screw tap 7 About half tooth, and workpiece 8 is fixed by tapping clamp, and screw tap 7 can independently carry out uniform tapping, chain by engagement force to workpiece 8 The lower limit sensor 4 of detection machining spindle, when machining spindle 6 reaches lower limit, Programmable Logic Controller it is provided with on wheel 5 12 control machining spindle 6 reversion exits.

Workpiece mentioned here is containing porose workpiece, the nut of the most non-tapping, as long as the shape of this kind of workpiece, And use suitable fixture, and can be with changing correspondingly sized screw tap according to workpiece pore size, in conjunction with other automatic equipments, so that it may To carry out the batches of production of automatization.

Above-described is only the preferred embodiment of the present invention, it is noted that for a person skilled in the art, On the premise of without departing from present configuration, it is also possible to make some deformation and improvement, these also should be considered as the guarantor of the present invention Protecting scope, these are all without affecting effect and the practical applicability that the present invention implements.

Claims

1. a self-tapping judgment means for tapping machine, including bench drill, pulling force sensor, is fixed on the cylinder of bench drill side, Control the Programmable Logic Controller of cylinder action and be arranged on the sprocket wheel of bench drill gear shaft outboard end, it is characterised in that: also include one The chain of root bar shaped, described chain one end fixes and is engaged on sprocket wheel, the other end of chain and pulling force sensor is fixing connects, The piston rod of this pulling force sensor and cylinder is fixing to be connected, and described sprocket wheel is provided with gag lever post, bench drill is provided with spacing The lower limit sensor that pole pair is answered, described lower limit sensor, pulling force sensor and cylinder are electrical with Programmable Logic Controller respectively Connect.

The self-tapping judgment means of tapping machine the most according to claim 1, it is characterised in that: it is provided with on described bench drill The adjustable mounting seat of lower limit sensor is installed.

The self-tapping judgment means of tapping machine the most according to claim 1, it is characterised in that: described chain and sprocket wheel The fixed engagement number of teeth is at least two teeth.

4. the determination methods of the self-tapping judgment means of tapping machine as claimed in claim 1, it is characterised in that:

Step one: under operation, the Material Sensor being arranged on fixture detects that Workpiece clamping puts in place, PLC technology Device controls cylinders retract and pulls chain, thus band movable sprocket rotates, the machining spindle of the bench drill that chain wheel drive engages with its gear Fast downlink carries out tapping；

Step 2: pulling force sensor detects when the value of thrust of chain exceedes setting value in programmable controller program, able to programme Delaying time of controller 0.2 to 0.5 second so that the screw tap installed on bench drill can be by work-piece tapping half tooth to a tooth；

Step 3: delay time one arrives, Programmable Logic Controller sends control cylinder and resets rapidly the signal stretched out；

Step 4: screw tap independently carries out uniform tapping by engagement force to workpiece；

Step 5: lower limit sensor detects when screw tap reaches lower limit, the machining spindle reversion of bench drill is exited.