A kind of rod material automatic feeding continuous turning device
The utility model relates to a kind of lathe servicing unit, is specifically related to a kind of bar-stock automatic feeding unit of numerically controlled lathe.
The automatic feeding of numerically controlled lathe, refer to and can be used for realizing self-feeding when coordinating numerically controlled lathe continuous circulation processing materials, thus the working (machining) efficiency of equipment and the feed mechanism of automaticity or equipment can be significantly improved, can carry out processing to manufacture required product parts to all kinds of longer bar (comprising round bar and hexagonal material, materials in the tube etc.).In recent years along with the increase day by day of cost of labor, the running cost that enterprise faces and cost pressure also increasing, and the most effective approach of walking out this predicament upgrades and transformation process equipment, the automaticity of raising equipment and production efficiency, reduce labour intensity, and realize people's multi-machine operation, ensure and improve part crudy prerequisite under significantly reduce the production cost of part, shorten the production cycle of product, with the economic benefit of the market competitiveness and enterprise that improve enterprise product sale simultaneously.In lathe in machining, the clamping of workpiece is the principal element that restriction working (machining) efficiency improves, and therefore numerically controlled lathe configuration automatic feeding is significant to the production efficiency improving numerically controlled lathe.
The supporting autoloader approved product of current numerically controlled lathe mainly contains oil bath feeder, storing type feeder, Weight type feeder etc.Storing type feeder deposit doses is large, can realize not shutting down friction feeding, but feeding diameter range is little and price is higher; Weight type feeder structure is relatively simple, price also than oil bath feeder and storing type feeder low, but the not high parts machining of required precision can only be used for, and noise and vibration all larger.Oil bath feeder is comparatively advanced in current feeder product, application also the most a kind of product, oil bath feeder by Hydraulic Station to material pipe fuel feeding, promote piston rod (charging ram) and bar is pushed main shaft, during work, bar is in the hydraulic oil of material pipe, when bar rotates, the damping of fluid is counter make stress under, bar will float in material pipe, when rotating speed is very fast, bar will rotate in material pipe central authorities by self-suspending, to reduce collision and the friction of bar and feeding tube wall, vibration during reduction work and noise.Relative to aforesaid two kinds of feeders, oil bath feeder has that feeding diameter range is wide, feed length long, easy to operate, good stability, bar be without advantages such as wearing and tearing, when be applied to high rotating speed, long bar, precision workpiece add man-hour, its advantage can be manifested more fully.
The weak point of above-mentioned several autoloader approved product is: because the material feeding driving mechanism needing configuration complicated is as Hydraulic Station or servo motor driving device, thus the structure of feeder is comparatively complicated, operation requirements is high, and maintenance difficulty is large, and the cost of equipment purchasing is relatively high; Feeder work time vibration and noise larger; Once occur that hydraulic fluid leak also can cause the pollution of workplace except affecting feeder work, feeder also will be made normally to work when occurring that oil circuit blocks; Long-term rotation due to machined material easily makes charging ram and machined material contact jaw cause deformation and damage and produces to beat; Feeder is console mode structure, and occupied ground area is large.
Summary of the invention
In order to overcome the above-mentioned some shortcomings part existing for existing numerically controlled lathe bar-stock automatic feeding unit, the utility model proposes that a kind of material feeding driving mechanism, structure are simple without the need to configuring, reliable operation, with low cost, processing ease, work time substantially do not produce vibration and noise, do not need to use hydraulic oil thus to there will not be hydraulic fluid leak or oil circuit blocking yet and make feeder normally work and to pollute the numerically controlled lathe rod material automatic feeding continuous turning device that the problem of workplace, maintenance and repair are easy, do not take work-yard.
To achieve these goals, the utility model is by the following technical solutions:
A kind of rod material automatic feeding continuous turning device, this automatic feeding is installed on the knife rest of numerically controlled lathe for several main cutting tools for cutting one end face of work pieces process and billmpse tool, boring tool, boring bar tool, cut-out grooving cutter, raw material-the bar of processing work is clamped by the hydraulic claw being arranged on lathe spindle front end, during feeding, unclamping and clamping of hydraulic claw is then controlled by the digital control system of lathe.The major technique key of the technical program is as described below: install tractive instrument at cutter spacing place of the knife rest of numerically controlled lathe, and described tractive instrument is by drawing fixture block and fixture block seat is connected by screw and is fixed as one; The leading portion of traction fixture block is with the notch of U-shaped, and the edge of described U-lag mouth is made up of semicircle and the straight flange that connects with semicircle two ends, and the thickness at U-lag mouth edge is slightly less than the blade cut tread degree cutting off grooving cutter.Be provided with columnar tail pipe in lathe spindle rear end, when lathe spindle rotates, tail pipe rotates thereupon together; At the multiple different profile position place perpendicular to its axis of tail pipe, being provided with several groups for supporting the supporting structure of bar, often organizing supporting structure and pressing assembly to form by three in 120 ° of identical tops configured; Described top pressure assembly comprises bearing, bearing pin, supporter, supporting seat, disk spring, bearing be positioned at supporter the inner jag place, be fixed on supporter with columniform bearing pin, supporter is then installed in supporting seat, supporter is slidably matched with the endoporus of cylindrical and supporting seat, in the step plane and supporting seat of supporter upper end, be provided with disk spring between hole end surface; After bar loads tail pipe and hydraulic claw, the bearing on supporter presses down at the spring-force driven dual of disk spring and is attached to billet surface.Bar front end, in the backwardness that completes the processing of a workpiece and cut-off grooving lancinates, cuts off grooving cutter and is fed to bar position of cutting next time and cuts out the traction grooved that has certain depth again; Along with the feeding of knife rest is moved, the U-lag mouth of traction fixture block leading portion inserts in traction grooved, and after hydraulic claw unclamps, knife rest feeding drives bar to move forward to preposition.
The utility model also adds following further technical scheme: cut off grooving cutter and draw the same cutter spacing that fixture block is arranged on knife rest, fixture block seat for fixed traction fixture block is placed on the handle of a knife of cut-out grooving cutter, compresses both by the knife rest screw on knife rest simultaneously.
The beneficial effects of the utility model are: the numerically controlled lathe rod material automatic feeding continuous turning device that the utility model proposes, without the need to configuring the material feeding driving mechanism such as Hydraulic Station or servo motor driving device, but utilize the feeding of knife rest to drive bar to move forward by the traction fixture block be arranged on knife rest, there is structure simple, with low cost, reliable operation, processing ease, the advantage that maintenance and repair is easy, and substantially do not produce vibration and noise when working, do not need to use hydraulic oil thus to there will not be hydraulic fluid leak or oil circuit block and make feeder cannot normally work and pollute the problem of workplace yet, because the supporting of the non-clamping end of bar is non-console mode structure, thus do not take work-yard.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model embodiment workpiece-small-caliber forged steel gate valve seat to be processed.
Fig. 2 is the schematic diagram after one of embodiment valve seat manufacturing procedure-rough turn that will complete completes.
Fig. 3 is the traction feeding of embodiment technical scheme and the structural representation of machining part.
Fig. 4 is one of the rough turn face work of valve seat, cylindrical, beat bore hole complete after cut-out grooving to lancinate the schematic diagram of workpiece.
Fig. 5 is the schematic diagram cutting off grooving cutter car traction grooved.
Fig. 6 is that the U-lag mouth of traction fixture block inserts in traction grooved, drives the schematic diagram of bar reach.
Fig. 7 is the sectional view at A-A section place in Fig. 6, and shown by this sectional view is structure and the mounting means of tractive instrument.
Fig. 8 is the schematic diagram that bar completes auto-feed, tractive instrument exits.
Fig. 9 is the supporting structure schematic diagram of the bar non-clamping end of embodiment technical scheme.
Figure 10 is the partial enlarged drawing at the pressure assembly place, top of tail pipe in Fig. 9.
Figure 11 is the sectional view at B-B section place in Figure 10.
In figure, 1, lathe spindle; 2, hydraulic claw; 3, bar; 4, knife rest; 5, knife rest screw; 6, fixture block is drawn; 7, fixture block seat; 8, tail pipe; 9, end face and billmpse tool; 10, boring bar tool; 11, centre drill chuck; 12, drill chuck; 13, centre drill; 14, drill bit; 15, boring tool; 16, cutter holder; 17, grooving cutter is cut off; 18, traction grooved; 19, screw; 20, supporting seat; 21, supporter; 22, bearing; 23, disk spring; 24, bearing pin; 25, bolt.
Detailed description of the invention
Below in conjunction with drawings and Examples, the technical solution of the utility model is further elaborated.
One of be the schematic diagram of small-caliber forged steel gate valve seat as shown in Figure 1, the first turning operation of valve seat (rough turn) be: take bar as raw material, after lathe dog clamping, rough turn end face, step cylindrical at different levels, punching, bore hole, cut; Work status after one of rough turn operation completes as shown in Figure 2.In order to improve working (machining) efficiency, this operation adopts the rod material automatic feeding continuous turning device proposed with the utility model on numerically controlled lathe to carry out high efficiency processing.In the present embodiment, boring, borer system is according to 1/2 " processing characteristic of valve seat and requiring is configured: punching aperture when valve seat interstitial hole is rough turn is 6.3mm; aperture boring is to 7.5+0.08mm; because the aperture in the 6.3mm hole in the middle of workpiece is less; easily train off during punching that to cause left end to pile inside edge one lateral deviation of weld groove thin and affect built-up welding, needs first with punching with drill bit behind φ 6.3 centre drill brill roll setting hole again; Because bore diameter is less, need to use the hole boring cutter of minor diameter to process, thus have employed cutter holder (16) when boring tool (15) clamping and carry out clamping cutter (Fig. 3).In order to ensure process safety, two the drilling tool chucks (11,12) on boring bar tool (10) adopt the drill chuck of carry-over moment defencive function, and when drilling goes wrong, drill chuck can skid and protect.In order to realize full-automatic processing, bar (3) is clamped by the hydraulic claw (2) being arranged on lathe spindle (1) front end, unclamping and clamping of hydraulic claw (2) is controlled by the digital control system of lathe, and procedure sends by the requirement of tooling step in good time and unclamps or clamp instruction; The open gaps of hydraulic claw (2) is by one-sided 0,75mm configuration.
Be illustrated in figure 3 the traction feeding of the present embodiment and the structural representation of machining part.The length of the raw material-bar (3) of processing work presses 2m blanking; Several cutters for one of rough turn operation: end face and billmpse tool (9), boring tool (15), boring bar tool (10), cut off grooving cutter (17), the knife rest (4) being installed on numerically controlled lathe is upper: end face and billmpse tool (9) are installed on 1. number cutter spacing, the boring bar tool (10) including centre drill (13) and drill bit (14) two pieces cutter is installed on 2. number cutter spacing, boring tool (15) is installed on 3. number cutter spacing, cuts off grooving cutter (17) and is then installed on 4. number cutter spacing.In the 4. number cutter spacing of Tool-rest of Numerical Control Lathe (4), tractive instrument for drawing feeding is also installed, tractive instrument is connected and be fixed as one (see Fig. 7) by two soket head cap screws (19) with fixture block seat (7) two parts by drawing fixture block (6), draw the notch of leading portion with U-shaped of fixture block (6), the edge of this U-lag mouth is made up of semicircle and the straight flange that connects with semicircle two ends, within the scope of the one fixed width at U-lag mouth edge, mill out a step surface linked up by milling cutter makes the thickness at U-lag mouth edge be slightly less than the blade cut tread degree cutting off grooving cutter (17), and the integral thickness drawing fixture block (6) is greater than the thickness at above-mentioned U-lag mouth edge to ensure that traction fixture block (6) has enough intensity and rigidity when drawing feeding.The centre-height of U-lag mouth is set to consistent with the centre-height after the centre-height of lathe spindle (1) that is bar (3) clamping, and half diameter of a circle opened inside grade size that is notch of U-lag mouth is then set to the diameter of the traction grooved (18) gone out slightly larger than institute's car on described bar (3) below.The above-mentioned edge thickness to U-lag mouth, centre-height, the setting of opening grade size ensure that the U-lag mouth of traction fixture block (6) can insert in traction grooved (18) and drive bar (3) to move forward.
To be supported in the length of stretching out lathe spindle (1) tail end to make bar (3) thus vibration and noise can not be produced when rotating, stablizing of machine tool running and cutting can be ensured, be provided with columnar tail pipe (8) (as shown in Figure 9) in lathe spindle (1) rear end, when lathe spindle (1) rotates, tail pipe (8) rotates thereupon together, four groups are provided with equally spacedly for supporting the supporting structure of bar (3) at the multiple different profile position place perpendicular to its axis of tail pipe (8), often organizing supporting structure presses assembly to form (see Figure 10 by three in 120 ° of identical tops configured, Figure 11), described top pressure assembly major part comprises bearing (22), bearing pin (24), supporter (21), supporting seat (20), disk spring (23), bearing (22) is positioned at the inner jag place of supporter (21), be fixed on supporter (21) with columniform bearing pin (24), the axis direction of bearing (22) is perpendicular to the axis of bar (3), supporter (21) is then installed in supporting seat (20), supporter (21) is slidably matched with the endoporus of cylindrical and supporting seat (20), between the interior hole end surface of the step plane in the upper end, the face of cylinder that supporter (21) coordinates with supporting seat (20) and supporting seat (20), be provided with disk spring (23), the position of installing top pressure assembly at tail pipe (8) is processed with penetrating window, the leading portion of bearing (22) and supporter (21) stretches in tail pipe (8) from this window, and supporting seat (20) is fixed on tail pipe (8) from the outside of tail pipe (8) with bolt (25).After bar (3) loads tail pipe (8) and hydraulic claw (2), the bearing (22) (four groups totally ten two) on supporter (21) presses down at the spring-force driven dual of disk spring (23) surface being attached to bar (3).The effect of disk spring (23), one is to provide suitable thrust, and two is make top press assembly to have compensation ability, can appropriate compression bar when bar (3) has certain flexibility or sectional dimension to have a deviation.During lathe running, because tail pipe (8) supporting structure rotates, each other without relative motion together with bar (3), thus in process, the basic friction of bar supporting device and noise produce, and also there is not the delivery device of prior art and the wearing and tearing of bar tail end of high-speed rotation and the problem of damage.
Add man-hour, cutter spacing end face 1. and billmpse tool (9) first carry out the roughing (Fig. 3) of end face and cylindrical step surface, then cutter spacing boring bar tool 2. (10) and cutter spacing boring tool 3. (15) carry out Drilling operation, Boring successively, and then the workpiece completing one of rough turn operation cuts (Fig. 4) from the traction grooved (18) being positioned at previous processing by cutter spacing cut-out grooving cutter (17) 4..
Bar (3) front end is completing the processing of a workpiece and cut-off grooving cutter (17) cuts backwardness, the cutting edge cutting off grooving cutter (17) continues to move to bar (3) cutting position and cutting out the dark traction grooved of 2.5mm (18) (Fig. 5) next time, lathe spindle (1) stops operating, knife rest (4) continues feeding makes the U-lag mouth of traction fixture block (6) insert in traction grooved (18), all there is small gap the bottom land face of cylinder and the groove both sides of the notch of U-lag mouth and both sides and traction grooved (18), then machine tool numerical control system sends instruction hydraulic claw (2) is unclamped, knife rest (4) moves forward to making traction fixture block (6) drive bar (3) to move forward to precalculated position (Fig. 6), the U-lag mouth of traction fixture block (6) exits with knife rest (4), hydraulic claw (2) clamps (Fig. 8) again, complete a fabrication cycles.
Above-mentioned knife rest (4) moves forward to driving bar (3) stroke that moves forward to be the gap that the rough turn thickness of workpiece adds on front side of U-lag mouth and traction grooved (18); The supporting structure at tail pipe (8) place of bar (3) rear end is owing to being overlay surface in bar (3) with bearing (22), during bar (3) reach, bearing (22) can rotate thereupon, and thus when knife rest (4) and traction fixture block (6) drive bar (3) reach feeding, the required resistance overcome is very little.
Knife rest (4) described in the technical solution of the utility model, both can adopt numerical control squaring head, also can adopt digital control vertical turret, can also adopt gang feed tool rack.When adopting digital control vertical turret, because the cutter spacing of vertical turret knife rest is more, thus in each cutter spacing, a cutter or instrument can be only installed, centre drill described above and drill bit, can separate and respectively be arranged in a cutter spacing, tractive instrument and cut-out grooving cutter also respectively can take a cutter spacing and be installed separately.Because digital control vertical turret majority is applied on the numerically controlled lathe of large and medium-sized number, miniature numerical control lathe adopts squaring head or gang feed tool rack substantially, so the knife rest of the present embodiment (4) adopts numerical control squaring head.Because squaring head only has 4 cutter spacing, thus part cutter or instrument need to merge use cutter spacing, but this does not affect processing, but decrease the time of blade holder turns transposition on the contrary, are thus more conducive to improving working (machining) efficiency.In the present embodiment, except the centre drill chuck (11) of clamping centre drill (13) and the common use of the drill chuck (12) of clamping drill bit (14) 2. number cutter spacing, as shown in Figure 3 and Figure 7, cut off grooving cutter (17) and draw the 4. number cutter spacing that fixture block (6) is installed in knife rest (4), for fixed traction fixture block (6) fixture block seat (7) install time be placed on cut off grooving cutter (17) handle of a knife on, by the knife rest screw (5) on knife rest (4) simultaneously by both compress.
In sum, the technical solution of the utility model does not need as common autoloader, need material feeding driving mechanism such as configuration Hydraulic Station or servo motor driving device etc. to carry out feeding, but utilize the feed motion of knife rest to realize feeding by traction fixture block, the structure of feed mechanism is simplified greatly, thus have with low cost, reliable operation, processing ease, the advantage that maintenance and repair is easy, simultaneously because without the need to using hydraulic oil, thus hydraulic fluid leak or oil circuit is there will not be to block and make feeder cannot normally work and pollute the problem of workplace, the supporting structure of the uniqueness of bar rear end also makes substantially not produce vibration and noise during machine tool running, in addition, because the support pattern of bar end is non-console mode structure, thus the technical solution of the utility model has the advantage not taking work-yard compared with common autoloader.After the feeding of numerically controlled lathe and machining achieve full-automation, just can implement people's multi-machine operation, thus the manufacturing cost of product of can enhancing productivity to greatest extent, reduce.
Below in conjunction with the accompanying drawings and embodiments specific description has been done to the technical solution of the utility model, but these accompanying drawings and explanation can not be understood to limit scope of the present utility model.Those skilled in the art should know; the utility model is not subject to the restriction of above-described embodiment and accompanying drawing; its protection domain defined by appending claims; any in the technical scheme not exceeding the various changes in the scope that the utility model claims define, modification is formed; all do not depart from spirit of the present utility model and technical spirit, still can belong within right of the present utility model.