CN2754783Y - Vibrating tapping machine for realizing compound movement from low gear differential transmission - Google Patents

Abstract

The utility model relates to a vibrating tapping machine for realizing compound movement by using low gear differential transmission, which is provided with a power source electric motor, a pillar, a worktable and a main shaft box body. The utility model is characterized in that the high speed rotational movement of a machine tool is conversed into a movement mode compounded by low speed revolution and high speed revolution plane movement by a low gear differential transmission mechanism composed of an eccentric input element, an internal gear and an external gear. The movement is conversed into a movement compounded by the low speed revolution and high frequency torsional oscillation by an output mechanism composed of an end cover, a shifting fork pin and a component with a shifting fork slot, and is transferred to a main shaft of a machine tool by a square axis to realize the function of the vibrating tapping. Compared with the prior art, the utility model has the advantages of compact structure, light weight, convenient and quick completion of the operation of the internal thread vibrating tapping, prolonged service life of the tap screw and improved thread machining quality, and can be extensively used in the operation of the internal thread vibrating tapping.

Description

The few tooth difference transmission of a kind of usefulness realizes the vibration threading machine of compound motion

Technical field

The utility model belongs to screw thread machinery processing technique field, relates to a kind of vibration threading machine that adopts few tooth difference transmission to realize compound motion.

Background technology

The experiment and the research of vibrating and tapping technology start from earlier 1960s, because it is little that vibrating and tapping has a tapping moment of torsion, smear metal is discharged smoothly, the screw tap life-span is long, series of advantages such as thread quality is good, since this technology produces, attracted domestic and international many skiver authors to drop into research, wherein the most representative is the pure youth of river bend portion of Japan, he is at the seventies in last century six development platform vibration threading machine of informing against just, after this adopt the overlapped vibration tapping method to the experiment of vibrating and tappings such as pottery and rubber again, obtained good technological effect.In addition, states such as the former Soviet Union, India, Poland have also carried out lot of experiments work aspect vibrating and tapping, all obtained similar technological effect.China starts from the eighties about the research of vibrating and tapping, the Gou Qi of BJ University of Aeronautics ﹠ Astronautics, the people such as Bao Shaoji of Dalian University of Technology successively adopt the method for stepper motor vibrating and tapping, studied the vibrating and tapping technological effect of common material, difficult-to-machine material such as titanium alloy etc., all obtain the tapping moment of torsion and reduced about 30%, cutting fluid lubrication is effect improved, accuracy of thread improves, effects such as cutter life prolongation.Though, the existing at home certain research basis of vibrating and tapping, but also can not satisfy the requirement of production practices far away, the main version of the domestic and international vibration threading machine of developing has three kinds at present---step motor type, two-way motion synthesis type and planetary, the vibrating and tapping device of these three kinds of forms characteristics and weak point separately is respectively: step motor type is simple in structure, and kinematic parameter is convenient to adjust, and shortcoming is that power is less, need the special electrical apparatus control system of configuration, cost is higher; Two-way motion synthesis type is realized required low speed rotation and high speed rotary motion respectively by two driving-chains, and then two motions are synthesized, realize the output of rotation and torsional-vibration composite-motion at last by output mechanism, the characteristics of this method are to realize the compound motion of large speed ratio, be the synthetic of low speed revolution and high frequency torsional oscillation, shortcoming is the transmission chain length, complex structure, volume is big, and combination mechanism assembling and manufacturing structure manufacturability are poor; The planetary motion combination mechanism has omitted two driving-chains and combination mechanism, directly rotation and revolution are synthesized on the planetary gear by Gear Planet Transmission, structural complexity is simplified greatly, but low speed turns round and the speed ratio of high frequency torsional oscillation is very limited, and has influenced the technological effect of vibrating and tapping.In the prior art before the present invention, the CN85104259 patent disclosure a kind of triangular cam spindle box; The CN86106470 patent disclosure a kind of brill that adopts two cover rotating shaft train drive paths with shake the hinge main spindle box; The CN01240462.4 patent application discloses a kind of cam link formula spindle driver; Though above-mentioned technology has all realized the compound motion of rotation with vibration, be and adopt one or two power source to realize by two drive paths.The structure of these several technology is not only heavy, the drive path complexity, and also processability of product structure is poor.Realizing also there are many problems aspect the compound motion mode of required rotation of vibrating and tapping and twisting vibration as can be seen, thereby making the vibrating and tapping Products Development be subject to many limitations.

Summary of the invention

At the problem that exists in the above-mentioned vibrating and tapping product development, the purpose of this utility model is, a kind of vibration threading machine that adopts few tooth difference transmission to realize low speed rotation and high frequency torsional-vibration composite-motion is provided, independently finishes the vibrating and tapping operation with special equipment as internal thread machining.

Now the utility model technical solution is described below:

The utility model is based on the vibration threading machine of few tooth difference transmission, the utilization single power source, by a moving line high speed rotary motion is input to few tooth difference transmission mechanism, realization will rotatablely move and convert low speed revolution and two kinds of compound forms of motion of motion of high speed rotation plane motion to, and then, above-mentioned two kinds of compound motions are changed into rotation and the compound forms of motion output of twisting vibration by the eccentric sheave output mechanism.Its structural representation has power source motor 30, is installed in workbench 33 and main shaft casing 24 on the column 32 as shown in Figure 1, 2, and power source motor 30 is connected with eccentric input element 1 in the main shaft casing 24 by the band transmission; It is characterized in that: be with ball bearing 17 on the rotor journal of eccentric input element 1 lower end, ball bearing 17 is outer to be with end cap 4 and to connect firmly together external gear 16; External gear 16 is fixed a shifting fork pin 5 with internal gear 19 mutual interlocks and lower end; Internal gear 19 connects firmly with supporting seat 20 and is integral, and is fixed in machine tool chief axis casing 24; Shifting fork pin 5 is assemblied in to connect firmly in the fork slot of sheave element 23 and with end cap 4 and is integral; Sheave element 23 is installed in the supporting seat 20 by ball bearing 22; Square axis 7 one ends and sheave element 23 connect firmly, the other end and part 25 join and and the square hole of part 25 between be slidingly matched for precision; Part 25 is fixed on the main shaft 12; Main shaft 12 be installed in the sliding sleeve 8 by needle bearing 13 and and needle bearing 13 between be slidingly matched for precision; Spring 10 and spring 11 supports main shaft 12 float in the sliding sleeve 8; Main shaft 12 front ends are finished being installed of screw tap 29 by member 27, three lobe taper skewbacks 15 and the nut 28 of band square hole.

The utility model has outstanding advantage compared with prior art: (1) this product with compact structure, and in light weight, can finish the operation of internal thread vibrating and tapping quickly and easily.(2) peculiar shock effect of vibrating and tapping and pressing effect make the instantaneous cutting force peak value of vibrating and tapping be lower than common tapping, and vibrating and tapping cutting force average is about 1/3～1/5 of common tapping.(3) the distinctive reciprocating motion of screw tap can strengthen the infiltration and the lubricant effect of tapping process cutting fluid, and process system has the rigidization effect under the effect of waveform cutting force, thereby improves the screw tap life-span, reduces the screw tap rate that fractures, and improves screw processing quality.

Description of drawings

Fig. 1: the utility model vibration threading machine general structure schematic diagram

Fig. 2: the utility model vibration threading machine main shaft casing assembly structure figure

Wherein:

Fig. 1: 30 power source motors, 32 columns, 33 workbench, 24 main shaft casings

Fig. 2: 1 motion input element, 2 support sets, 3 spacers, 4 end caps, 5 shifting fork pin, 6 spacers, 7 square axis, 8 sliding sleeves, 9 pads, 10 springs, 11 springs, 12 main shafts, 13 needle bearings, 14 nylon cushions, 15 taper skewbacks, 16 external gears, 17 ball bearings, 18 spacers, 19 internal gears, 20 supporting seats, 21 spacers, 22 ball bearings, 23 sheave elements, 24 lathe headstocks, 25 square hole members, 26 main shaft end caps, 27 anti-switch block 28 clamp nuts 29 screw taps constitute.

The specific embodiment

Now in conjunction with the accompanying drawings the specific embodiment of the present utility model is described further:

Referring to Fig. 1: the utility model vibration threading machine general structure has power source motor 30, is installed in workbench 33 and main shaft casing 24 on the column 32; Eccentric input element 1 is connected with power source motor 30 in the main shaft casing 24; When lathe carried out the thread tapping operation, its operation principle was except that the motion of main shaft mode is different from common bench tapping machine, and all the other methods of operating and common tapping machine are just the same.

Referring to Fig. 2: the utility model is realized the 1 motion input element for the band rotor journal in few tooth difference transmission vibration tapping machine of compound motion with single power source, realize high speed rotary motion is input to the few tooth difference transmission mechanism that external gear 16 and internal gear 19 constitute by this part, the motion input mode that is adopted is the V-belt transmission; In few tooth difference transmission mechanism, internal gear 19 and supporting seat 20 connect firmly and are integral, and be fixed in machine tool chief axis casing 24, like this, rotating speed is that the input of n (rpm) rotatablely moves that just to change into rotating speed by few tooth difference transmission be that revolution of n/i (rpm) low speed and rotating speed are that n (rpm), the radius of gyration are that the high speed Plane of rotation of e1 moves, and two motions are compounded on the external gear 16 simultaneously, on the external gear 16 arbitrarily the motion of any just show as low speed revolution and the high speed Plane of rotation mutually compound movement locus that moves; Simultaneously, end cap 4 connects firmly together with external gear 16, and shifting fork pin 5 connects firmly with end cap 4 and is integral, and therefore, shifting fork pin 5 also has the compound motion same with external gear 16; Member 23 is the compound motion output element of band fork slot, when the fork slot of shifting fork pin 5 and member 23 is assembled together by relation shown in Figure 2, the low speed revolution of shifting fork pin 5 is directly output as the low speed rotation of member 23, and the high speed Plane of rotation of shifting fork pin 5 motion can be resolved into radially the vibration with tangential two vertical direction, wherein radial vibration is released, do not produce output, and tangential vibrations is converted into the twisting vibration of sheave element 23.Thereby on sheave element 23, obtained required rotation and the torsional oscillation compound motion of vibrating and tapping; Sheave element 23 is installed in the supporting seat 20 by ball bearing 22, the above-mentioned compound motion that sheave element 23 is possessed, pass to the part 25 that is fixed in band square hole on the main shaft 12 by square axis 7 again, one end and the sheave element 23 of square axis 7 connect firmly, the square hole of the other end and part 25 is that precision is slidingly matched, and the main shaft 12 of vibration threading machine has just possessed required low speed rotation and the high frequency torsional oscillation compound motion of vibrating and tapping like this; In order to realize the required nose balance of vibrating and tapping, the main shaft 12 of tapping machine can move by easy on and off in sliding sleeve 8, in addition also can be the same with former lathe, realize that with sliding sleeve 8 bigger stroke moves axially.The main shaft 12 of vibration threading machine, its front end is finished being installed of screw tap by member 27, three lobe taper skewbacks 15 and the nut 28 of band square hole, because main shaft 12 has possessed low speed rotation and high frequency torsional oscillation compound motion, therefore, this tapping machine can finely be finished vibrating and tapping operation efficiently.

Claims (3)

1, the few tooth difference transmission of a kind of usefulness realizes the vibration threading machine of compound motion, have power source motor (30), be installed in workbench (33) and main shaft casing (24) on the column (32), power source motor (30) is connected with eccentric input element (1) in the main shaft casing (24) by the band transmission; It is characterized in that: the rotor journal of eccentric input element (1) lower end is with ball bearing (17) outward, and external gear (16) is installed on the ball bearing (17), and makes it axial location by spring collar and end cap (4); The interlock mutually of external gear (16) and internal gear (19), and fix a shifting fork pin (5) with end cap (4) lower end that external gear (16) connects firmly; Internal gear (19) connects firmly with supporting seat (20) and is integral, and is fixed in machine tool chief axis casing (24); Shifting fork pin (5) is assemblied in to connect firmly in the fork slot of sheave element (23) and with end cap (4) and is integral; Sheave element (23) is installed in the supporting seat (20) by ball bearing (22); Square axis (7) one ends and sheave element (23) connect firmly, and the other end and part (25) are slidingly connected; Part (25) is fixed on the main shaft (12); Main shaft (12) but front end clamping screw tap.

2, the few tooth difference transmission of usefulness according to claim 1 realizes the vibration threading machine of compound motion, it is characterized in that: main shaft (12) be installed in the sliding sleeve (8) by needle bearing (13) and and needle bearing (13) between be slidingly matched for precision; Spring (10) and spring (11) supports main shaft (12) float in the sliding sleeve (8); Main shaft (12) front end is finished being installed of screw tap (29) by member (27), three lobe taper skewbacks (15) and the nut (28) of band square hole.

3, the few tooth difference transmission of usefulness according to claim 1 realizes the vibration threading machine of compound motion, it is characterized in that: be slidingly matched for precision between the square hole of square axis (7) and part (25).

Images