CN103157855A

CN103157855A - Automatic tapping judging device of tapping machine

Info

Publication number: CN103157855A
Application number: CN2013101112616A
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: 2013-06-19
Anticipated expiration: 2033-04-02
Also published as: CN103157855B

Abstract

The invention relates to a tapping auxiliary device, in particular to an automatic tapping judging device of a tapping machine. The automatic tapping judging device of the tapping machine comprises a bench drill, a tension sensor, an air cylinder which is fixed on the inner surface of the bench drill, a programmable logic controller which controls motion of the air cylinder and a chain wheel which is arranged at the outer side end of a gear shaft of the bench drill. The automatic tapping judging device of the tapping machine further comprises a bar-shaped chain, one end of the chain is fixed and meshed on the chain wheel, the other end of the chain is fixedly connected with the tension sensor, the tension sensor is fixedly connected with the piston rod of the air cylinder, a limit rod is arranged on the chain wheel, a lower limit sensor which is relative to a limit rod is arranged on the bench drill, and the lower limit sensor, the tension sensor and the air cylinder are respectively in an electric connection with the programmable logic controller. The automatic tapping judging device of the tapping machine has the advantages of being low in production cost, small in energy consumption, and high in automatic degree.

Description

A kind of self-tapping judgment means of tapping machine

Technical field:

The present invention relates to a kind of tapping servicing unit, especially a kind of self-tapping judgment means of tapping machine.

Background technology:

For some five metals standard components and nonstandard finding endoporus tapping procedures, industrial factories and miness are normal adopts common tapping machine manual operations to complete, but this technique is extremely inconvenient, and cost is high, efficient is slow, particularly for the part of need batch machining.For addressing these problems, some realize that the self-tapping equipment of automatic operation progresses into market and extensively accepted by the user.In addition, the energy-saving and emission-reduction policy that proposes for responding country, there is wide popularizing application prospect in the lathe re-manufacturing technology that general bench drilling machine or old tapping machine is carried out the numerical control transformation of the way or lifting, the transformation of the way simultaneously or promote after the automatic loading/unloading tapping machine should be to energy-conservation, numerical control, environment friendly future development.

at present, many times in order to save cost, still use common table to transfer and carry out tapping, general bench drilling machine comprises machining spindle, drive the motor that machining spindle rotates, the handle of operation machining spindle, wherein handle is connected gear shaft to connect with machining spindle, old tapping machine is the screw tap size of changing on the general bench drilling machine machining spindle now, operating grip carries out tapping to the workpiece that is fixed on fixture artificially, the dynamics speed of tapping all leans on people's subjective judgement, the ability that does not just possess auto-feed tapping and judgement tapping dynamics, want to want to allow it can realize self-tapping, increase automaticity, be necessary to design a kind of general bench drilling machine that is applicable to, and cost is low, the judgment means that self-tapping simple to operate is auxiliary.

Summary of the invention:

The technical problem to be solved in the present invention is: the not self-tapping judgment means of tapping and two states of tapping of a kind of Tong Guo automatic decision based on general bench drilling machine is provided.

in order to solve the above problems, the invention provides a kind of self-tapping judgment means of tapping machine, comprise bench drill, pulling force sensor, be fixed on the cylinder of bench drill side, the Programmable Logic Controller of control cylinder action and the sprocket wheel that is arranged on bench drill gear shaft outboard end, it is characterized in that: the chain that also comprises a bar shaped, described chain one end is fixed and is engaged on sprocket wheel, the other end of chain is fixedly connected with pulling force sensor, the piston rod of this pulling force sensor and cylinder is fixedly connected with, be provided with gag lever post on described sprocket wheel, be provided with the lower limit sensor corresponding with gag lever post on bench drill, described lower limit sensor, pulling force sensor and cylinder are electrically connected with Programmable Logic Controller respectively.

The present invention can realize the self-tapping function after configuring vibrating disk, automatic feed mechanism and fixture, and can constitute automatic production line with other automation equipment, self-tapping judgment means of the present invention can prop up by the machining spindle of bench drill the power size of workpiece and come automatic decision not tapping and two states of tapping, thereby realize the ability of even self-tapping, and this self-tapping judgment means cost is low, good operability, reliability are high, be easy to realize.

the operation principle of the self-tapping judgment means of tapping machine is: coordinate vibrating disk, automatic feed mechanism and fixture, in workpiece enters fixture, workpiece being detected by the material sensor puts in place, the Controlled by Programmable Controller cylinders retract pulls chain, thereby band movable sprocket rotation, the machining spindle of the bench drill of chain wheel drive and its gear engagement is descending fast carries out tapping, when the screw tap of rotation props up workpiece, the pulling force that pulling force sensor detects chain raises suddenly, this value of thrust dynamically fed back to Programmable Logic Controller and with programmable controller program in setting value relatively, when it surpasses setting value, the Programmable Logic Controller time-delay allowed screw tap shoot about workpiece half tooth in 0.4 second, then sending the signal controlling cylinder resets rapidly and stretches out, no longer give the downward power of machining spindle, due to this moment screw tap shot workpiece half about tooth, and workpiece is fixed by tapping clamp, screw tap can independently carry out uniform tapping to workpiece by engagement force, be provided with the lower limit sensor that detects machining spindle on sprocket wheel, when machining spindle reaches lower limit, counter-rotating is withdrawed from.

For the processing of the workpiece that adapts to different length, being arranged on adjustable mount pad of lower limit sensor according to the degree of depth of workpiece hole, can be regulated the tapping depth that mount pad adapts to workpiece.

In order to make chain and sprocket wheel the slot phenomenon can not occur in motion process, described chain and the sprocket engagement number of teeth are at least two teeth.

Description of drawings:

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 at A place in Fig. 1;

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

The specific embodiment:

Below in conjunction with drawings and Examples, technical solution of the present invention is further illustrated:

as Fig. 1, 2 and the self-tapping judgment means of tapping machine shown in Figure 3, comprise bench drill 1, be fixed on the cylinder 2 of bench drill 1 side, the Programmable Logic Controller 12 of control cylinder 2 actions and workflow, sprocket wheel 5 with machining spindle 6 interlock of bench drill 1, be provided with an end on this sprocket wheel 5 and weld and mesh chain 10, the other end of this chain 10 is fixedly connected with cylinder 2 by pulling force sensor 3, be provided with the gag lever post 11 that detects screw tap 7 lower limit on sprocket wheel 5, be provided with adjustable mount pad on the residing bench drill 1 of sprocket wheel 5 and the lower limit sensor 4 that coordinates with gag lever post 11 is installed, described lower limit sensor 4, pulling force sensor 3 and cylinder 2 are electrically connected with Programmable Logic Controller 12 respectively.

coordinate vibrating disk, automatic feed mechanism and fixture, in workpiece 8 enters fixture 9, the material sensor detects workpiece 8 and puts in place, Programmable Logic Controller 12 control cylinders 2 are retracted and are driven chain 10, thereby make sprocket wheel 5 drive that machining spindle 6 in tapping machines 1 is descending fast carries out tapping, when the screw tap 7 that rotates props up workpiece 8, owing to being provided with the pulling force setting value in Programmable Logic Controller 12 programs, at this moment the value of thrust on the chain that detects of pulling force sensor 3, the setting value of this value of thrust and Programmable Logic Controller 12 relatively, when it surpasses setting value, Programmable Logic Controller 12 time-delay 0.4 second, allow screw tap 7 shoot about workpiece 8 half teeth, then sending signal controlling cylinder 2 resets rapidly and stretches out, no longer give the downward power of machining spindle 6.Due to this moment screw tap 7 shot workpiece 8 half teeth left and right, and workpiece 8 is fixed by tapping clamp, screw tap 7 can independently carry out uniform tapping to workpiece 8 by engagement force, be provided with the lower limit sensor 4 that detects machining spindle on sprocket wheel 5, when machining spindle 6 reached lower limit, Programmable Logic Controller 12 controlled working main shaft 6 counter-rotatings were withdrawed from.

Here said workpiece is to contain porose workpiece, such as the nut of tapping not, as long as for the shape of this kind workpiece, and use suitable fixture, with according to the workpiece pore size can with commutation should the size screw tap, in conjunction with other automatic equipments, just can carry out automation production in batch.

Above-described is only the preferred embodiment of the present invention; should be understood that; for a person skilled in the art; under the prerequisite that does not break away from structure of the present invention; can also make some distortion and improvement; these also should be considered as protection scope of the present invention, and these can not affect effect of the invention process and practical applicability.

Claims

1. the self-tapping judgment means of a tapping machine, comprise bench drill, pulling force sensor, be fixed on the cylinder of bench drill side, the Programmable Logic Controller of control cylinder action and the sprocket wheel that is arranged on bench drill gear shaft outboard end, it is characterized in that: the chain that also comprises a bar shaped, described chain one end is fixed and is engaged on sprocket wheel, the other end of chain is fixedly connected with pulling force sensor, the piston rod of this pulling force sensor and cylinder is fixedly connected with, be provided with gag lever post on described sprocket wheel, be provided with the lower limit sensor corresponding with gag lever post on bench drill, described lower limit sensor, pulling force sensor and cylinder are electrically connected with Programmable Logic Controller respectively.

2. the self-tapping judgment means of tapping machine according to claim 1, is characterized in that: be provided with the adjustable mount pad that the lower limit sensor is installed on described bench drill.

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

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

Step 1: under running status, being arranged on material sensor on fixture detects Workpiece clamping and puts in place, the Controlled by Programmable Controller cylinders retract pulls chain, thus band movable sprocket rotation, and chain wheel drive and the machining spindle of the bench drill of its gear engagement be quick descending carries out tapping;

Step 2: the value of thrust that pulling force sensor detects chain surpasses when setting value in programmable controller program, Programmable Logic Controller time-delay 0.2 to 0.5 second, and making platform turn the screw tap of upper installation can be with work-piece tapping half tooth to a tooth;

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

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

Step 5: when the lower limit sensor detected screw tap and reaches lower limit, the machining spindle counter-rotating that platform turns was withdrawed from.