disclosure of Invention
aiming at the defects in the prior art, the invention aims to provide a helical tooth cold forging machine which has the advantage of higher production efficiency.
The technical purpose of the invention is realized by the following technical scheme: the utility model provides a cold forging machine of spiral tooth, includes the frame, sets up workstation in the frame, sets up cold forging mould, the hydro-cylinder that sets up on the workstation and be located the workstation top in the frame, cold forging mould includes base, main part and extrusion head, base fixed connection is on the terminal surface of workstation towards the hydro-cylinder, the main part is installed on the terminal surface of base towards the hydro-cylinder, the through-hole has been seted up to main part center department, the extrusion head is installed in through-hole pore wall department, the extrusion head includes collar and extrusion piece, collar inlays locates through-hole pore wall department, the extrusion piece is the heliciform, and the figure of extrusion piece is a plurality of and is circumference evenly distributed for the center with the axial lead of collar, oil cylinder piston rod is towards workstation one side, and oil cylinder piston rod is mutually perpendicular with the terminal surface of workstation towards the hydro-cylinder.
Through above-mentioned technical scheme, use this cold forging machine to add man-hour to the helical tooth, at first place cylindric blank inside the through-hole, and the tip of blank offsets with the extrusion piece. And then, the piston rod of the oil cylinder is controlled to extend, and when the end part of the piston rod of the oil cylinder is abutted against the blank, the piston rod of the oil cylinder pushes the blank to move towards one side of the base. In the process, the blank is extruded by the extrusion block, so that the spiral groove is gradually formed on the side wall of the blank. Therefore, the thread grooves on the connecting sections are not required to be milled one by using a milling machine, the time is short, and the production efficiency is high.
Preferably, the main part has seted up the spread groove that is linked together with the through-hole on the terminal surface towards the hydro-cylinder, the collar is placed inside the spread groove, and collar and spread groove tank bottom looks butt, inside the spread groove be provided with collar end face looks butt ring, and the butt ring passes through the screw and links to each other with the main part.
Through above-mentioned technical scheme, when the extrusion head damaged because of the number of times of use is too much, only need with the screw of butt on the ring screw off, later exert pulling force to the butt ring for butt ring and main part separation. At the moment, the extrusion head can be taken out and replaced only by applying pulling force to the mounting ring. Therefore, the whole cold forging die does not need to be replaced, the waste of materials is reduced, and the cold forging die is more environment-friendly.
Preferably, the end part of the piston rod of the oil cylinder is provided with a mounting seat, the mounting seat is rotatably connected with a pressure rod, and the end part of the pressure rod protrudes out of the end surface of the mounting seat facing the workbench.
Through above-mentioned technical scheme, at the in-process that carries out the cold forging to the helical tooth, because the extrusion piece is the heliciform, so the blank is when receiving the pressure effect of depression bar, and the blank rotates around self central line. And the pressing rod is rotationally connected with the mounting seat, so that when the blank rotates, the blank drives the pressing rod to rotate through friction force. Therefore, the relative rotation between the pressing rod and the blank is less, the pressing rod is not easy to wear, and the service life of the cold forging machine is prolonged to a certain extent.
preferably, the end face of the pressure lever facing the workbench is integrally formed with a connecting block for being inserted into the kidney-shaped groove.
through above-mentioned technical scheme, add man-hour to the blank, inside the connecting block on the depression bar stretched into the kidney-shaped groove, and the lateral wall of connecting block offsets with the interior cell wall of kidney-shaped groove. Like this when the blank rotates, the depression bar rotates thereupon, and does not take place relative rotation between depression bar and the blank, has reduced the wearing and tearing of depression bar in the very big degree, has improved the life of this cold forging machine to a certain extent.
Preferably, a cavity is arranged inside the mounting seat, the pressure lever penetrates through the cavity, and an elastic part connected with the outer side wall of the pressure lever is arranged on the wall of the inner cavity of the cavity.
Through above-mentioned technical scheme, when depression bar and helical tooth separation, the elastic component applys elasticity to the depression bar for the depression bar rotates around self central line. In the process of rotating the pressure rod, the pressure rod drives the processed spiral teeth to rotate through the connecting block, so that the spiral teeth gradually move towards the outer side of the cold forging die. Therefore, the helical teeth do not need to be taken out manually by a user, and the using process of the cold forging machine becomes more convenient and quicker.
Preferably, be provided with liftout mechanism on the base, liftout mechanism is located inside the through-hole, liftout mechanism includes the spring that links to each other with the base is fixed and connects the layer board on the spring keeps away from the tip of base.
Through the technical scheme, when the spiral teeth are formed in a cold forging mode, the output shaft of the oil cylinder is controlled to shrink, and at the moment, the spring exerts the elastic force pointing to one side of the oil cylinder on the supporting plate, so that the supporting plate and the spiral teeth integrally move towards the outer side of the cold forging die. Therefore, the helical teeth formed by cold forging do not need to be taken out manually by a user, and the using process of the cold forging machine becomes more convenient and quicker.
Preferably, the supporting plate comprises a supporting plate abutted to the inner hole wall of the through hole and a connecting plate rotatably connected inside the supporting plate and fixedly connected with the spring.
Through above-mentioned technical scheme, promote the helical tooth at liftout mechanism and carry out the in-process that removes towards the cold forging mould outside, the helical tooth rotates around self central line, and the helical tooth drives the backup pad through frictional force and rotates, and relative rotation between helical tooth and the backup pad is less like this, and helical tooth and backup pad are difficult for taking place wearing and tearing, have improved the life of this cold forging machine to a certain extent.
Preferably, a rubber pad is arranged on the end face, deviating from the base, of the supporting plate.
Through above-mentioned technical scheme, when the helical tooth under the pressure effect of depression bar with the rubber pad butt, the rubber pad takes place elastic deformation because of the extrusion effect that receives the helical tooth, and the rubber pad cladding after the deformation is on the lateral wall of helical tooth. In the process that the liftout mechanism promotes the helical tooth and moves towards the cold forging mould outside like this, the helical tooth drives the backup pad through the rubber pad and moves, does not take place direct contact between helical tooth and the backup pad like this for difficult wearing and tearing have improved this cold forging machine's life to a certain extent between helical tooth and the backup pad.
In summary, compared with the prior art, the beneficial effects of the invention are as follows:
1. The spiral teeth are produced through cold forging forming, so that a milling machine is not needed to mill spiral grooves at the connecting sections one by one, and the production efficiency of the spiral teeth is improved to a great extent;
2. The utility model discloses a cold forging machine, including the depression bar, the depression bar is including the depression bar, and the depression bar is connected with the blank, and the blank is connected with the depression bar.
The present invention will be described in further detail with reference to the accompanying drawings.
A cold forging machine for spiral teeth is shown in figure 2 and comprises a frame 1, a workbench 2, an oil cylinder 4 and a cold forging die 3. The workbench 2 is fixedly connected to the frame 1, and the top surface of the workbench 2 is a horizontal surface.
The oil cylinder 4 is arranged on the frame 1 and is positioned right above the workbench 2, a piston rod of the oil cylinder 4 penetrates through the frame 1 and extends towards one side of the workbench 2, and the piston rod of the oil cylinder 4 is vertical to the top surface of the workbench 2.
As shown in fig. 3 and 4, a cylindrical mounting seat 8 is provided at an end of a piston rod of the cylinder 4, and the mounting seat 8 and the piston rod of the cylinder 4 are coaxially provided. A cylindrical cavity 11 is arranged in the mounting seat 8, and the axis of the cavity 11 is coincident with the axis of the mounting seat 8. The cavity 11 is provided with a connecting hole on the inner cavity wall far away from the side of the oil cylinder 4, and the connecting hole extends towards the side far away from the mounting seat 8 and penetrates through the end surface of the mounting seat 8 far away from the oil cylinder 4. Be provided with depression bar 9 on the mount pad 8, depression bar 9 includes integrated into one piece's butt piece 91 and connecting axle 92, and butt piece 91 is located cavity 11 inside and keeps away from the inner chamber wall looks butt of hydro-cylinder 4 one side with cavity 11, and connecting axle 92 wears to locate inside the connecting hole and rotates with the connecting hole and link to each other. The end of the connecting shaft 92 far away from the abutting block 91 is an extrusion end, the extrusion end protrudes out of the end face of the mounting base 8 far away from the oil cylinder 4, and the extrusion end is fixedly connected with a waist-shaped connecting block 10. The cavity 11 is also provided with an elastic element 12 inside, and the elastic element 12 can be a tension spring. One end of the elastic element 12 is connected with the inner cavity wall of the cavity 11, and the other end is fixedly connected with the side wall of the abutting block 91.
Cold forging die 3 includes base 31, main body 32, and extrusion head 33. The base 31 is arranged on the top surface of the workbench 2, and the base 31 is connected with the workbench 2 by pressing through screws. The main body 32 is fixedly connected to the top surface of the base 31, and the main body 32 and the base 31 are coaxially arranged. The top surface of the main body 32 is opened with a through hole 5 with a circular orifice shape, and the through hole 5 extends along the axial direction of the main body 32. The main body 32 is provided with a connecting groove 6 on the end surface facing the oil cylinder 4, the notch shape of the connecting groove 6 is circular, and the diameter of the notch of the connecting groove 6 is larger than the aperture of the through hole 5. Extrusion head 33 includes a mounting ring 331 and an extrusion block 332. The mounting ring 331 is located inside the connecting groove 6, the outer side wall of the mounting ring 331 is abutted to the inner groove wall of the connecting groove 6, and the diameter of the inner ring of the mounting ring 331 is equal to the aperture of the through hole 5. The squeeze blocks 332 are provided in a number and are arranged in a circumferential array centered on the axis of the mounting ring 331. The pressing block 332 is bent in a spiral shape centering on the axis line of the mounting ring 331. The inside butt ring 7 that is provided with of spread groove 6, and the lateral wall of butt ring 7 offsets with spread groove 6 interior cell wall, and the terminal surface and the collar 331 butt of butt ring 7 towards workstation 2 one side. A plurality of screws penetrate through the abutting ring 7, and the screws are in threaded connection with the main body 32 and press the abutting ring 7 on the main body 32.
The main body 32 is also internally provided with an ejecting mechanism 13, and the ejecting mechanism 13 is used for ejecting the cold-forged helical teeth out of the main body 32. The ejector mechanism 13 includes a spring 131 and a retainer plate 132. The spring 131 is located inside the through hole 5, and the end of the spring 131 close to the base 31 is fixedly connected with the base 31. The retainer plate 132 is attached to the end of the spring 131 remote from the base 31. The support plate 132 includes a connection plate 1322 and a support plate 1321. The web 1322 is cylindrical and is fixedly attached to the end of the spring 131 remote from the base 31. The supporting plate 1321 is sleeved on the connecting plate 1322 and is rotatably connected with the connecting plate 1322, and the outer side wall of the supporting plate 1321 is abutted against the inner hole wall of the through hole 5. The end of the supporting plate 1321 away from the base 31 is adhered with a rubber pad 14, and the rubber pad 14 is used for abutting against the spiral teeth.
The specific use process of the helical tooth cold forging machine is as follows: the blank is first placed inside the through hole 5 and the end of the blank abuts against the squeezing block 332. And then the piston rod of the oil cylinder 4 is controlled to extend, so that the mounting seat 8 and the pressing rod 9 integrally move towards one side of the blank. When the pressure lever 9 abuts against the operating section 15, the connecting block 10 extends into the kidney-shaped groove 17, and the outer side wall of the connecting block 10 abuts against the inner groove wall of the kidney-shaped groove 17. Then the piston rod of the control cylinder 4 continuously extends, in the process, the pressure rod 9 applies pressure to the blank to the side of the base 31, so that the blank moves towards the side of the base 31. During the movement of the blank, the extrusion head 33 extrudes the side wall of the blank and forms the helical groove 18 in the side wall of the blank. Meanwhile, since the pressing block 332 is bent in a spiral shape, the blank rotates about its center line while moving toward the base 31 side. In the process of rotating the blank, the blank applies thrust to the connecting block 10, so that the pressing rod 9 rotates around the central line of the pressing rod. When the blank is cold-forged into the helical teeth, the output shaft of the control oil cylinder 4 contracts, so that the mounting seat 8 and the pressing rod 9 integrally move towards the side far away from the base 31. Meanwhile, the elastic member 12 applies an elastic force to the pressing rod 9, so that the pressing rod 9 rotates around its center line. During the rotation of the pressure rod 9, the pressure rod 9 drives the helical teeth to rotate through the connecting block 10 and gradually moves towards the outside of the main body 32. Meanwhile, the spring 131 located inside the through hole 5 applies an elastic force directed to the side of the cylinder 4 to the support plate 132, so that the helical teeth can be smoothly moved toward the outside of the main body 32.
The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.