Background technology
Publication number is that the patent document of CN201231294Y, CN101716636A individually discloses two kinds of numerical control wire bending machines, their similar, all for the curved line of continuous wire shaping (such as steel wire coiled strip), comprise frame, frame is provided with bar straightening mechanism, wire agency, head rotating mechanism, head, shut-off mechanism, mould, mould free-wheeling system, mould switching mechanism and control unit.But, in prior art, carry out the shaping wire bending machine of curved line there are no to sectional segmentation wire rod.The problem that continuous wire wire bending machine cannot be directly used in segmentation wire rod carries out curved line shaping is: one is the feeding that existing feed mechanism cannot realize segmentation wire rod; Two is when changing wire rod, and segmentation wire rod is plug-in mounting difficulty in the through wires hole of head; Three is when curved line is shaping, and segmentation wire rod cannot be fixed by reliable retention, affects curved line quality.For this reason, inventor designs a kind of numerical control wire bending machine, and on the basis of the continuous wire wire bending machine of prior art, improve pay-off and head, the curved line enabled for segmentation wire rod is shaping.The present invention relates to the feeding rod of pay-off wherein.
Summary of the invention
In order to solve above-mentioned technical problem, the object of this invention is to provide a kind of feeding rod for numerical control wire bending machine, for the hitch feed of segmentation wire rod.
To achieve the above object, present invention employs following technical scheme:
For the feeding rod of numerical control wire bending machine, described feeding rod has the centre bore that can hold segmentation wire rod, a wire rod retaining mechanism is installed in the front end of feeding rod, described wire rod retaining mechanism comprises upper gripper jaw and lower jaw, lower jaw is fixed on the front end of feeding rod, the clamping face of upper gripper jaw and lower jaw is provided with the holding tank matched with wire rod, one end of upper gripper jaw and the hinged and upper gripper jaw of lower jaw are at the radial cut rotation in surface of wire rod, the other end of upper gripper jaw is provided with groove or through hole, to be threaded with lower jaw through the screw of this groove or through hole thus segmentation wire rod is locked upper gripper jaw and lower jaw.
As preferably, the rear end of described feeding rod is fixed on motor cabinet, mounted motor on motor cabinet, and motor cabinet is fixedly mounted on slide block, slide block slides axially at track base ascender line material, track base is fixed with screw mandrel, and screw mandrel has been threaded feed screw nut, and feed screw nut is arranged on slide block by bearing, slide block fixedly mounts motor cabinet, mounted motor on motor cabinet, motor is connected with screw nut driving, motor cabinet is fixed the rear end of feeding rod.Adopt feeding rod and its front end to be locked wire rod, the feeding of segmentation wire rod and curved line processing are implemented, adopts motor and slide block to be synchronized with the movement, improve moving feeding precision.
The present invention, owing to have employed above technical scheme, adopts feeding rod and its front end to be locked wire rod, the feeding of segmentation wire rod and curved line processing is implemented, adopt the structure that upper gripper jaw can be opened, wire rod easy accessibility, be locked firmly, simple and reasonable, low cost of manufacture.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is made a detailed explanation.
Embodiment 1:
A kind of numerical control wire bending machine as shown in Figure 1 and Figure 2, comprises frame 1, and frame 1 is provided with head 2, head rotating mechanism 6 and pay-off from front to back successively, and wherein head 2 is provided with curved line mould 3 and mould free-wheeling system thereof, mould switching mechanism.
Here head rotating mechanism 6, curved line mould 3 and mould free-wheeling system thereof are identical with the structure of continuous wire wire bending machine of the prior art with mould switching mechanism, and such as publication number is the structure disclosed in the patent document of CN201231294Y, CN101716636A, CN101733344B.The handpiece structure of the present embodiment is as follows: comprising that head is provided with can the worm gear case of horizontal hunting, worm screw in worm gear case is driven by mould spinning motor and rotates, and drives two worm gears simultaneously, and two worm gears are fixedly connected with two main shafts, main shaft band internal spline, splined shaft is connected with main spindle multiple spline; Two curved line moulds are separately fixed at two splined shaft tops, and the sheathed stage clip in splined shaft bottom, offsets bottom stage clip lower end and splined shaft, and in stage clip upper end and main shaft, step offsets, thus drive splined shaft to move down; Head is provided with numerical control scale-division device, numerical control scale-division device promotes worm gear case swing by swing arm and connecting rod and realizes mould conversion.Described head rotating mechanism comprises the rotating shaft rotating and be arranged on axle bed, head is fixed in rotating shaft one end, the rotating shaft other end fixes rotating disk, rotating disk is provided with Balance Iron, rotating shaft axle center is provided with the guide pipe that can pass through for wire rod, described rotating shaft is connected with the electric rotating machine gear drive be fixed on axle bed, and described electric rotating machine is connected with control unit.
The problem that continuous wire wire bending machine cannot be directly used in segmentation wire rod carries out curved line shaping is: one is the feeding that existing feed mechanism cannot realize segmentation wire rod; Two is when changing wire rod, and segmentation wire rod is plug-in mounting difficulty in the through wires hole of head; Three is when curved line is shaping, and segmentation wire rod cannot be fixed by reliable retention, affects curved line quality.For this reason, in the present invention, frame 1 arranges the pay-off for pushing segmentation wire rod, head 2 is set up the thread clamping mechanism 5 for gripping segmented line 4.
Described pay-off comprises for clipped segment wire rod 4 and realizes the clamping delivery device 8 of advance and retreat and the auxiliary guide mechanism 7 for carrying out supplemental support and mobile guide to segmentation wire rod.As shown in Figure 3, clamping delivery device 8 comprises track base 81, screw mandrel 82, slide block 83, feeding rod 84, motor cabinet 85 and motor 86, track base 81 is arranged in frame 1, slide block 83 slides axially at track base 81 ascender line material, track base 81 is fixed with screw mandrel 82, screw mandrel 82 has been threaded feed screw nut, feed screw nut is arranged on slide block 83 by bearing, slide block 83 fixedly mounts motor cabinet 85, mounted motor 86 on motor cabinet 85, motor 86 is connected with screw nut driving, motor cabinet 85 is fixed the rear end of feeding rod 84, as shown in Figure 5, a wire rod retaining mechanism is installed in the front end of feeding rod 84, this wire rod retaining mechanism comprises upper gripper jaw 841 and lower jaw 842, lower jaw 842 is fixed on the front end of feeding rod 84, the clamping face of upper gripper jaw 841 and lower jaw 842 is provided with the holding tank matched with wire rod, one end of upper gripper jaw 841 and the hinged and upper gripper jaw 841 of lower jaw 842 are at the radial cut rotation in surface of wire rod, the other end of upper gripper jaw 841 is provided with groove or through hole, screw through this groove or through hole is threaded thus the segmentation wire rod 4 that upper gripper jaw 841 and lower jaw 842 is locked with lower jaw 842.Described feeding rod 84 preferably has centre bore such as, so that hold a part for segmentation wire rod, pipe.As shown in Figure 4, described auxiliary guide mechanism 7 comprises guide holder 71, vertical cylinder 72, horizontal air cylinder 73, tugboat seat 74 and guiding tugboat 75, guide holder 71 is fixed in frame 1, vertical cylinder 72 is fixed on guide holder 71, the piston rod top fixing horizontal cylinder 73 ejected straight up of vertical cylinder 72, horizontal air cylinder 73 top is provided with horizontal slide rail, horizontal slide rail slidably connects tugboat seat 74, the piston rod that horizontal air cylinder 73 level ejects is fixedly connected with tugboat seat 74, tugboat seat 74 is arranged the guiding tugboat 75 for supporting feeding rod 84, guiding tugboat 75 can rotate and circumferentially be provided with annular groove.When feed distance is less forward for clamping delivery device 8, vertical cylinder 72 and horizontal air cylinder 73 eject, and make guiding tugboat 75 can support feeding rod 84; When clamping delivery device 8 pushed forward and be more and near guiding tugboat 75, vertical cylinder 72 and horizontal air cylinder 73 reset, and guiding tugboat 75 is return and avoided, and making to clamp delivery device 8 can pushed forward feeding further.
As shown in Figure 6, described thread clamping mechanism 5 is arranged on head 2, two the clamp oil cylinders 51 be oppositely arranged about comprising and two clampings 52, realize folder relative to ejecting thus driving two clampings 52 to move about the mobile terminal of two clamp oil cylinders 51, two clampings 52 arrange clamp mouth near the front portion of curved line mould 3, clamp mouth is provided with the clip slot matched with wire rod, the groove of two clampings 52 for penetrating for feeding rod 84 front end after clamp mouth, so not only make clamp mouth can keep larger chucking power when clamping, and make curved line position can more near the end of segmentation wire rod, the rear side of two clampings 52 is provided with the fairlead 53 for wearing segmentation wire rod or feeding rod 84, and fairlead 53 is arranged on guide sleeve seat 54, and guide sleeve seat 54 is fixed on head 2.
Change the outfit like this segmentation wire rod time, wire rod 4 is passed the centre bore of fairlead 53 and head rotating mechanism 6, because aperture is installed easily much larger than wire diameter, be fixedly clamped the rear end of wire rod 4 in the front end of feeding rod 84, clamp wire rod by two clampings 52, it is shaping that curved line mould 3 carries out curved line, clamping 52 is unclamped during feeding, control feeding as required by servomotor 86, the centre bore of fairlead 53 and head rotating mechanism 6 can be passed in the front end of feeding rod 84, until after the clamp mouth of clamping 52.