CN2480148Y

CN2480148Y - Automatic tabletting press

Info

Publication number: CN2480148Y
Application number: CN 01239341
Authority: CN
Inventors: 王玉英
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-16
Filing date: 2001-05-16
Publication date: 2002-03-06
Anticipated expiration: 2011-05-16

Abstract

An automatic tablet press machine comprises a propulsion plant, a driving device, a frame restraining device, a lifting lever locking device, a power measure structure, a circuit arrangement, and an automatic control circuit device, the powdered cement is follow-up pressure, auto-shaping, and is transported into a device to test via an electric motor and a set of automatic control device. The tablet press machine overcomes the shortcomings of traditional hydraulic tablet press machines, alleviates the labor intensity of experimenters, avoids oil-leakage phenomenon, achieves full-automatic operation, and ensures the pressure keep a certain time on a constant value, thereby guaranteeing the tablet quality and greatly improving working efficiency simultaneously.

Description

Automatic tableting press

The utility model relates to a kind of tablet press machine, particularly a kind of automatic tableting press.

The physical analysis instrument that is used for elementary analysis is widely used at home and abroad industrial.When some article that need test is in pulverulence, under the pressure of the requirement of Physical Analysis Methods, need pressurize with forcing press, make it at supporting mould internal shaping, and then send into instrument and carry out physical analysis.

At present, at cement industry and the supporting tablet press machine of analytical instrument, the principle of all having applied mechanically hydraulic jack is promptly used manually, makes oil pressure promote the purpose that reaches compressing tablet by jack.There is the following shortcoming in this tablet press machine:

1, because cement sample analytical test number of times is frequent, experimenter's manual operation, labour intensity is very big;

2, manually the oil pressure tablet press machine need use seal, therefore to the material performance requirement height of various seals, because material property does not reach and requires or cause and all oil leakage phenomenon can occur by material aging that maintenance bothers because of frequent the use;

3, owing to leakage of oil, the situation that regulation requires may appear not reaching in pressure, and owing to be manually, be difficult to make pressure to keep certain hour at a certain steady state value, so can influence the compressing tablet quality, brings certain influence to production.

The purpose of this utility model is exactly in order to overcome the above-mentioned defective of manual oil pressure tablet press machine.The inventor has designed a kind of new type auto tablet press machine, by a motor and a cover automaton, makes to be in that pulverous cement pressurizes automatically, automatic forming, sends into instrument then and tests.

The purpose of this utility model is achieved through the following technical solutions:

A kind of automatic tableting press, form by frame, casing, panel, power set, transmission device, elevating lever stopping means, frame-type restraint device, dynamometry structure and circuit arrangement, automatic control circuit device etc., it is characterized in that: by the motor drives cycloidal planetary gear speed reducer, reductor is again by gear drive, the rotation of drive screw mandrel, screw mandrel is rotary with nut outward, the outer insert one cylindrical swivel nut of nut, and swivel nut top is provided with down the top;

Rack framework by about two blocks of wallboards and up and down two top boards form, two wall-panels supports are lived in top board and lower roof plate, on upper plate, be provided with restraint device and dynamometry structure and circuit arrangement, at top end and be placed with between the top down the Powdered cement of can packing on dip mold;

Automaton is selected two 7556 circuit (CMOS technology " two 35 " circuit chip) for use.

Described elevating lever stopping means comprises: stud with a magnet steel in the keyway of described swivel nut, stud with two trifocals " hall device " in the flat key of the positioning sleeve outside swivel nut, lifting along with elevating lever, when magnet steel runs near " hall device ", machine promptly sends signal, even the stall of electrical apparatus control system motor can operate in the needed stroke tablet press machine elevating lever;

Described restraint device comprises: top end is connected with push rod, push rod is with O type circle outward, push rod is provided with small ball, big steel ball is supported on the small ball, big steel ball and jacking block join, and when the motor drives screw mandrel was just changeing, swivel nut up advanced, make dip mold and top die pressing and meet, stop dip mold to push away on continuing with the restraint device that is contained on the upper plate;

Described dynamometry structure comprises: be provided with pressing plate on upper plate, pressing plate pressing spring steel plate posts piezoelectric ceramic piece on the steel spring plate, and potsherd links to each other with high resistance operating amplifier, and is connected with the high stability low leakage capacitor; When the restraint device of upper plate is subjected to top power, by jacking block power is delivered to steel spring plate, steel spring plate produces flexural deformation under the constraint of pressing plate, the piezoelectric ceramic piece the two poles of the earth that stick on above the steel spring plate promptly produce electric charge, what are by measuring this electric charge with regard to the power that imposes on the cement sample as can be known;

Automaton is selected two 7556 circuit (CMOS technology " two 35 " circuit chip) for use, makes it in four " three or five " circuit, reaches following function: electric motor starting, hold function; The voltage comparing function; Crest voltage keeps function; Motor rotating handoff functionality.

The utlity model has following characteristics:

1, the deceleration again that cooperates by motor drives cycloidal planetary gear speed reducer and several gear drives the screw mandrel rotation then, makes tablet press machine electronic by manually becoming.

2, adopt feed screw nut's structure,, fundamentally overcome the defective that hydraulic press can not keep-up pressure because of leakage of oil because they have on the mechanics function that is referred to as " self-locking ".

3, utilize elasticity (linearity) distortion of steel spring plate under stressing conditions, piezoelectric ceramic piece is sticked on the steel spring plate, when piezoelectric ceramic piece was followed steel plate deformed, the electric charge that its two poles of the earth discharge produced voltage by the high resistance operating amplifier integration on capacitor.Measure this voltage and promptly impose on corresponding power on the sample as can be known.

4, be provided with pointer header, change-over switch, potentiometer etc. on the tablet press machine panel, the user can come set pressure by gauge outfit, potentiometer knob, and directly reads the actual power that applies of sample by change-over switch and observation gauge outfit.

5, tablet press machine is designed to full automatic working method, as long as the operator clicks starter button, workbench stops after promptly upwards running to set pressure automatically, kept for 5 seconds after, automatically downwards operation is got back to original position and is stopped.

6, for guaranteeing machine safety, adopt the combination of magnet steel and hall device, for workbench is provided with the highest and automatic spacing extreme lower position; For preventing electromotor overload,, switch and insurance are united two into one with the fuse of automatic air-break switch as machine.

Below in conjunction with accompanying drawing, describe an embodiment of the present utility model in detail, so that more clearly understand design feature of the present utility model and action principle.

Fig. 1 is the perspective view of automatic tableting press;

Fig. 2 is the A-A cutaway view of automatic tableting press;

Fig. 3 is the feed screw nut pair cutaway view;

Fig. 4 is control circuit figure.

Referring to Fig. 2, Fig. 3, a kind of automatic tableting press, form by frame, casing, panel, power set, transmission device, elevating lever stopping means, frame-type restraint device, dynamometry structure and circuit arrangement, automatic control circuit device etc., its structure and operating principle are: drive cycloidal planetary gear speed reducer 2 by motor 1 and rotate, reductor 2 passes through the transmission of gear 3, gear 4, gear 5 again, drive screw mandrel 6 rotations, screw mandrel is rotary with nut 35 outward, the outer insert one cylindrical swivel nut 7 of nut, swivel nut 7 tops are provided with down top 21; Rack framework by about two blocks of wallboards and up and down two top boards form, two wall-panels supports are lived in top board 29 and lower roof plate 25, on upper plate 29, be provided with restraint device and dynamometry structure and circuit arrangement 13, at top end 19 and be placed with between the top 21 down the Powdered cement of can packing on dip mold; In the keyway of described swivel nut 7, stud with a magnet steel 31, stud with two trifocals " hall device " 30 and 33 in the flat key 32 of the positioning sleeve 34 outside swivel nut, lifting along with elevating lever, when magnet steel runs near " hall device ", machine promptly sends signal, even the stall of electrical apparatus control system motor can operate in the needed stroke tablet press machine elevating lever.

Described restraint device comprises: top end 19 is connected with push rod 26, push rod is with 0 type circle 18 outward, push rod is provided with small ball 17, big steel ball 27 is supported on the small ball, big steel ball 27 joins with jacking block 16, and when the motor drives screw mandrel was just changeing, swivel nut up advanced, make dip mold and top die pressing and meet, stop dip mold to push away on continuing with the restraint device that is contained on the upper plate;

Described dynamometry structure comprises: be provided with pressing plate 14 on upper plate, pressing plate pressing spring steel plate 15 posts piezoelectric ceramic piece 28 on the steel spring plate, and potsherd links to each other with high resistance operating amplifier, and is connected with the high stability low leakage capacitor; When the restraint device of upper plate is subjected to top power, by jacking block power is delivered on the steel spring plate 15, steel spring plate produces flexural deformation under the constraint of pressing plate, the piezoelectric ceramic piece the two poles of the earth that stick on above the steel spring plate promptly produce electric charge, what are by measuring this electric charge with regard to the power that imposes on the cement sample as can be known; Computing formula is: the electric charge that U=Q/C Q-produces for the piezoelectric ceramics bending tablet, and C-is integrable capacitor, and voltage U is directly proportional with power F.Through actual measurement, pressure is good in 3-6 ton scope internal linear, and error satisfies instructions for use less than 1.5%.

Automaton is selected two 7556 circuit (CMOS technology " two 35 " circuit chip) for use, makes it in four " three or five " circuit, reaches following function:

Referring to Fig. 4.

U1 circuit-electric motor starting, hold function: when the operator presses the startup knob, perhaps when spacing up and down " hall device " of control elevating lever when sending signal, the U1 circuit promptly can disconnect or connect power supply.

U2 circuit-voltage comparing function: for satisfying the demand, by the adjustment of gauge outfit, potentiometer, preset certain magnitude of voltage, when actual measurement voltage reached consistent with preset voltage, the U2 circuit promptly can send signal, and motor stops operating.

U3 circuit one crest voltage keeps function: reach certain rigidity for making test water slice sample, except will reaching certain pressure, also need make pressure keep certain hour, for this reason, the U3 circuit is provided with the delay function in 5 seconds.

U4 circuit-motor rotating handoff functionality: reach lifting freely for making tablet press machine, this circuit by with the cooperating of relay, drive motor and between rotating and reverse, automatically switch.

Be provided with the positive and negative 12V dc source of transformer, bridge rectifier, three-terminal regulator block, filtering formation in the electric appliance box, Electric Machine Control relay etc.; For guaranteeing motor safety, adopt motor special-purpose air switch, realize that power switch and overload insurance unite two into one.

Claims

1, a kind of automatic tableting press is made up of frame, casing, panel, power set, transmission device, elevating lever stopping means, frame-type restraint device, dynamometry structure and circuit arrangement, automatic control circuit device etc., it is characterized in that:

By the motor drives cycloidal planetary gear speed reducer, reductor drives the screw mandrel rotation again by gear drive, and screw mandrel is rotary with nut outward, the outer insert one cylindrical swivel nut of nut, and swivel nut top is provided with down the top;

2, tablet press machine as claimed in claim 1 is characterized in that, studs with a magnet steel in the keyway of described swivel nut, studs with two trifocals " hall device " in the flat key of the positioning sleeve outside swivel nut.

3, tablet press machine as claimed in claim 1, it is characterized in that, described restraint device comprises: top end is connected with push rod, and push rod is with O type circle outward, and push rod is provided with small ball, big steel ball is supported on the small ball, big steel ball and jacking block join, and when the motor drives screw mandrel was just changeing, swivel nut up advanced, make dip mold and top die pressing and meet, stop dip mold to push away on continuing with the restraint device that is contained on the upper plate.

4, tablet press machine as claimed in claim 1 is characterized in that, described dynamometry structure comprises: be provided with pressing plate on upper plate, pressing plate pressing spring steel plate, post piezoelectric ceramic piece on the steel spring plate, potsherd links to each other with high resistance operating amplifier, and is connected with the high stability low leakage capacitor.