Bearing ring reverse extrusion stripping position variable device

Abstract

The present invention discloses a variable position device for reverse extrusion stripping of a bearing ring, and the patent of the present invention relates to the field of metal pressure processing, forming and automation. The present invention comprises a frame, an upper template of a crank press, a reverse extrusion punch fixed to the upper template, a lower template and a concave die set on the lower template, a ejector rod is located below the concave die, the lower end of the lower ejector rod is against a swing beam, one end of the swing beam is hinged on the frame, and the other end of the swing beam is connected to the lower end of the stripper rod, and a positioning locking and unlocking mechanism is arranged between the upper part of the stripper rod and the upper template, so that when the upper template moves down from the top to a set distance, the upper template and the stripper rod are locked. The variable position device for reverse extrusion stripping of a bearing ring is designed to clamp the stripper rod at a specific position of the upper template downward until the upper template moves up to a specific position and then releases the stripper rod, so as to increase the time for the manipulator to clamp the blank, and solve the problem that the slider does not wait at the upper dead point, and the manipulator has sufficient time to realize the clamping and feeding actions.

Description

Technical Field

[0001] The patent of the present invention is a device for changing the position of reverse extrusion stripping of a bearing ring, which relates to the field of metal pressure processing, forming and automation. Background Art

[0002] The most commonly used processing method for manufacturing small and medium-sized bearing rings is to use a closed single-point crank press to reversely extrude. The process route is: blanking - upsetting - reverse extrusion - bottom cutting - ring rolling. Blanking is achieved on a special shearing machine. The last three processes of upsetting, reverse extrusion and bottom cutting are usually performed on a crank press. The upper and lower die bases are connected to the upper slider and lower fixed table of the press. 2-3 operators complete the clamping and taking of materials at these three stations and pass them to the next station. This process has factors such as poor working environment, high labor intensity and low safety factor. Therefore, it is difficult for forging companies to recruit operators, especially young operators, which affects the development of the company. Science and technology are changing with each passing day. Forging automation is an inevitable trend in the development of science and technology today. The three-dimensional stepping beam manipulator is most suitable for this three-station automation operation.

[0003] Usually, the crank slider is expressed as 0°-360° to represent the state of the machine. Taking the intermediate reverse extrusion process as an example, the slider is at the upper dead center (0° position), and the operator puts the cake blank that has been upset in the first process into the reverse extrusion station. At this time, the upper plane of the lower ejector rod 6 coincides with the upper plane of the die 7 to facilitate material discharge and material collection. The slider continues to descend, and when it reaches a certain position, the reverse extrusion punch 8 begins to extrude the blank and begins to form. When the slider descends to 180° from the lower dead center, the reverse extrusion forming is completed, and the slider starts to ascend. When the slider ascends to the upper dead center (360°), the ejector device located under the fixed table under the press and the pull rod fixed on the upper template eject the reverse-extruded blank together. The operator quickly transfers the ejected blank to the third station for punching. After punching, the material is sent back to the material channel to enter the next process of ring rolling, and this cycle is repeated. To achieve automation, this series of actions must be completed by a robot, and a walking beam is the best solution.

[0004] The stepping beam installs four mechanical claws on a beam, and the beam completes X, Y, and Z three-dimensional movements under the operation of three servo systems. In the actual production process, the beat of the press is 20-40 times per minute, and the average is 30 times. The time to complete a cycle is 2 seconds. In such a short time, the manipulator must complete the clamping and feeding actions. The press beat and the mechanical beat are often inconsistent, and the "clamp collision" failure occurs. The current solution is to wait for 1-2 seconds at the top dead center to reduce the "clamp collision" failure, which will reduce the efficiency by about 50%. Another problem caused by the reduced efficiency is the low mold life and poor forging accuracy. "Strike while the iron is hot" is about this principle. This patent invents a device to achieve adjustable sliders between 270°-360°, push the back-extruded workpiece out of the mold, and give the manipulator sufficient time to achieve clamping and feeding actions. This method not only improves efficiency and reduces failure rate, but also improves mold life and forging accuracy. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the slider does not wait at the upper dead point, and the robot does not have sufficient time to realize the clamping and feeding actions, which is prone to collision. If the slider waits at the upper dead point, the efficiency is greatly reduced, the mold life is short and the forging accuracy is poor. In order to solve the above problems, the present invention provides a variable position device for the reverse extrusion and stripping of the bearing ring.

[0006] The object of the present invention is achieved in the following manner:

[0007] A device for variable back-extrusion and stripping position of a bearing ring comprises a frame of a crank press, an upper template of the crank press and a back-extrusion punch fixed to the upper template, a lower template of the crank press and a concave die arranged on the lower template, a ejector rod is arranged below the concave die, the lower end of the ejector rod rests on a swing beam, one end of the swing beam is hinged on the frame, and the other end of the swing beam is connected to the lower end of the stripper rod, a positioning locking and unlocking mechanism is arranged between the upper part of the stripper rod and the upper template, so that when the upper template moves down from the top to a set distance, the upper template and the stripper rod are locked, and when the upper template and the stripper rod move down together to the lower dead point of the slider and then move up together to the set distance position, the upper template and the stripper rod are unlocked, the upper template moves up, the stripper rod no longer moves up, and the upper template moves up to the upper dead point of the slider, and this cycle is repeated.

[0008] The positioning locking and unlocking mechanism is a guide tube fixed to the upper template, the guide tube is sleeved on a fixed clamp body bracket, two clamping plates are hingedly arranged opposite to each other on the clamp body bracket to form a clamp body, the left clamping head of the clamp body penetrates into the guide tube, and is clamped and cooperated with or disengaged from the stripping rod, and the right clamping head of the clamp body penetrates into a sliding sleeve on the right side of the clamp body bracket, and the sliding sleeve is passed through a clamp shaft, and the clamp shaft is a stepped shaft that is thin at the top and thick at the bottom, and the step surface is a conical surface.

[0009] The lower end of the clamping shaft is a touch rod, which is a threaded spiral telescopic rod and is used together with a stripping rod limit bolt to adjust and set the locking and unlocking distance.

[0010] The hinge shaft of the swing beam hinged on the frame is fixed on the slider of the guide rail pair, and a locking bolt is arranged between the slider and the guide rail.

[0011] The stripping rod is then moved upwards to the upper and lower dead centres of the slider, and the stripping rod is then moved upwards to the lower dead centre of the slider, and the stripping rod is then moved upwards to the lower dead centre of the slider. The time for the manipulator to clamp the blank is increased, which solves the problem that the slider does not wait at the upper dead point, and the manipulator has sufficient time to realize the clamping and feeding actions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the main view of the processing flow of the variable position device for reverse extrusion and stripping of bearing rings.

[0013] Figure 2 It is a cross-sectional view of a device for changing the position of reverse extrusion and stripping of a bearing ring.

[0014] Figure 3 It is a schematic diagram of a clamping body of a bearing ring reverse extrusion stripping position variable device.

[0015] Among them, 1 lower workbench, 2 lower template, 3 bottom cutting die base, 4 bottom cutting die, 5 bottom cutting die cover, 6 flat pad, 7 flat stripping plate, 8 flat seat, 9 flat adjustment sleeve, 10 clamp body, 11 clamp shaft, 12 bottom cutting punch, 13 reverse extrusion punch nut, 14 reverse extrusion punch seat, 15 upper template, 16 reverse extrusion punch, 17 upsetting upper fixing nut, 18 upsetting upper table, 19 upsetting lower table, 20 upsetting adjustment pad, 21 upsetting lower seat, 22 guide tube, 23 stripping rod, 23 1 annular groove, 24 reverse extrusion nut, 25 reverse extrusion die, 26 reverse extrusion die seat, 27 ejector rod, 28 lower ejector rod, 29 lower template, 30 lower ejector plate swivel seat, 31 rotating shaft, 32 lower ejector rod seat, 33 swing beam, 34 clamp shaft reset spring, 35 stripper rod limit bolt, 36 pull rod washer, 37 touch rod, 38 spring, 39 lower limit platform, 40 clamp body bracket, 41 clamp plate, 42 clamp plate connecting spring, 43 touch rod limit bolt, 44 stripper rod support spring. DETAILED DESCRIPTION

[0016] As attached Figure 1 As shown, the processing flow of the device for variable position of reverse extrusion stripping of bearing ring is as follows: the lower template 2 is fixedly connected to the top of the lower workbench 1, a bottom cutting die base 3 is arranged on one side of the top of the lower template 2, an upsetting lower seat 21 is fixed on the other side of the top of the lower template 2, a reverse extrusion die seat 26 is arranged in the middle of the top of the lower template 2, a reverse extrusion die seat 26 is connected to the top of the reverse extrusion die 25, a reverse extrusion nut 24 is connected to the top of the reverse extrusion die 25, a ejector rod 27 is arranged at the bottom of the reverse extrusion die 25, a lower ejector rod 28 is connected to the bottom of the ejector rod 27, a reverse extrusion punch 16 connected to the reverse extrusion punch seat 14 is arranged directly above the reverse extrusion die 25, an upper template 15 is fixedly connected to the top of the reverse extrusion punch seat 14, and an upsetting upper fixing screw is fixedly connected to one end of the upper template 15 close to the upsetting lower seat 21 Nut 17, the bottom of the upsetting upper fixing nut 17 is fixedly connected with an upsetting upper stage 18, an upsetting lower stage 19 is arranged directly below the upsetting upper stage 18, the bottom of the upsetting lower stage 19 is connected with an upsetting adjustment pad 20, the bottom of the upsetting adjustment pad 20 is fixedly connected with an upsetting lower seat 21, the upper template 15 is fixedly connected with a bottom cutting punch seat at one end away from the upsetting lower seat 21, the bottom cutting punch seat is fixedly connected with a bottom cutting punch 12, the outer surface of the bottom cutting punch 12 is sleeved with a flat width adjustment sleeve 9, the flat width adjustment sleeve 9 is fixedly connected with a flat width seat 8 on both sides, the bottom of the flat width adjustment sleeve 9 is fixedly connected with a flat width pad 6, and the two ends of the flat width pad 6 are fixedly connected with flat width stripping plates 7, the bottom cutting die base 3 is located directly below the bottom cutting punch 12, the top of the bottom cutting die base 3 is equipped with a bottom cutting die 4, and the top of the bottom cutting die 4 is connected to the bottom cutting die cover 5.

[0017] As attached Figure 2As shown, the bearing ring reverse extrusion stripping position variable device comprises a frame of a crank press, an upper template 15 of the crank press and a reverse extrusion punch 16 fixed to the upper template, a lower template 2 of the crank press and a concave die 25 provided on the lower template, a ejector rod 27 is provided below the concave die 25, the lower end of the ejector rod 27 is fixedly connected to a lower ejector rod 28, the lower ejector rod 28 abuts against a swing beam 33 through a lower ejector rod seat 32, one end of the swing beam 33 is hinged on the frame, and the other end of the swing beam 33 is connected to the lower end of the stripping rod 23 A ring groove 231 is provided on the stripping rod 23, and a positioning locking and unlocking mechanism is provided between the upper part of the stripping rod 23 and the upper template 25, so that when the upper template 15 moves down from the top to a set distance, the upper template 15 and the stripping rod 23 are locked, and when the upper template 15 and the stripping rod 23 move down to the lower dead point of the slider together and then move up to the set distance position together, the upper template 15 and the stripping rod 23 are unlocked, the upper template 15 moves up, the stripping rod 23 no longer moves up, and the upper template 15 moves up to the upper dead point of the slider, and this cycle is repeated.

[0018] The positioning locking and unlocking mechanism is a guide tube 22 fixed by the upper template 15, and the guide tube 22 is sleeved and fixed on the clamp body bracket 40. Two clamping plates 41 are hingedly arranged opposite to each other on the clamp body bracket 40, and a spring 42 is connected to the clamping plate to form a clamp body 10. The left clamping head of the clamp body 10 penetrates into the guide tube 22, and is clamped and cooperated with or disengaged from the stripping rod 23. The right clamping head of the clamp body 10 penetrates into the sliding sleeve on the right side of the clamp body bracket, and the sliding sleeve is passed through the clamp shaft 11. The clamp shaft 11 is a stepped shaft that is thin at the top and thick at the bottom, and the step surface is a conical surface. The outer surface of the thick stepped shaft of the clamp shaft 11 is sleeved with a clamp shaft reset spring 34. When the upper template 15 moves up to the set position, the clamp shaft reset spring 34 can make the clamp body 10 clamped on the thick stepped shaft of the clamp shaft 11 move up to the thin stepped shaft of the clamp shaft 11 when the clamping is loose.

[0019] The hinge axis of the swing beam 33 hinged on the frame is fixed on the slider of the guide rail pair, and a locking bolt is arranged between the slider and the guide rail. A spring 38 is arranged between the stripping rod 23 and the swing beam 33. When the upper template 15 is clamped with the stripping rod 23, the stripping rod 23 pulls the swing beam 33 when it goes up, and presses the swing beam 33 when it goes down. The swing beam 33 is provided with a movable connection hole to connect the stripping rod 23. The diameter of the hole is larger than the diameter of the stripping rod 23, so that the stripping rod 23 can easily swing back and forth in the hole. The movable connection hole can also be a notch-shaped hole. The outer surface of the stripper rod 23 is threadedly connected with a stripper rod limit bolt 35, and the outer surface of the stripper rod 23 is sleeved with a stripper rod support spring 44, and the stripper rod support spring 44 is located between the stripper rod limit bolt 35 and the lower template 2. A pull rod washer 36 is connected to the bottom of the stripper rod 23, which effectively reduces the wear of the stripper rod 23 and the lower surface of the swing beam 33 when the stripper rod 23 moves up and down, and increases the service life of parts. The swing beam 33 is connected to the lower ejector plate swivel seat 30 through the rotating shaft 31, and the rotating shaft 31 can adjust the length between the rotating shaft 31 and the lower ejector rod seat 32 on the lower ejector plate swivel seat 30.

[0020] As attached Figure 3 As shown, the clamp body 10 is composed of a clamp body bracket 40, a clamp plate 41 and a clamp plate connecting spring 42. The guide tube 22 is sleeved and fixed to the clamp body bracket 40. Two clamp plates 41 are hingedly arranged opposite to each other on the clamp body bracket 40, and the clamp body 10 is formed together with the clamp plate connecting spring 42. The left clamp head of the clamp body 10 penetrates into the guide tube 22, and is clamped and matched with or separated from the stripping rod 23. The right clamp head of the clamp body 10 penetrates into the sliding sleeve on the right side of the clamp body bracket, and the sliding sleeve is provided with the clamp shaft 11.

[0021] The working process of the present invention is as follows: the crank press is started, the crank press drives the upper template 15 downward, the upper template 15 drives the clamping shaft 11 downward, when the bottom of the clamping shaft 11 contacts the lower limit platform 39, the clamping shaft 11 stops moving downward, the clamping body 10 on the thin axis of the clamping shaft 11 follows the upper template 15 downward, when the clamping body 10 is about to reach the step axis from the thin axis of the clamping shaft 11, a part of the clamping body 10 close to the stripping rod 23 has slipped off When the upper template 15 moves downward, one end of the clamp body 10 is on the step shaft, and the other end is in the annular groove 231 of the stripping rod 23. When one end of the clamp body 10 reaches the thick axis of the clamp shaft 11, the other end of the clamp body 10 is clamped in the annular groove 231 of the stripping rod 23. The upper template 15 and the stripping rod 23 are locked by the clamp body 10. The upper template 15 and the stripping rod 23 move downward together to the bottom dead center of the slider and then move upward together to the stripping rod 23. The bottom of the rod 23 is about to separate from the lower limit platform 39, and the upper template 15 continues to move upward. One end of the clamp body 10 slides upward in the annular groove 231 of the stripping rod 23, and the other end slides upward on the thick axis of the clamp shaft 11. When one end of the clamp body 10 is about to reach the thin axis of the clamp shaft 11, the other end of the clamp body 10 completely leaves the annular groove 231 of the stripping rod 23. When one end of the clamp body 10 reaches the thin axis of the clamp shaft 11, the other end of the clamp body 10 separates from the stripping rod 23, and the upper template 15 is unlocked from the stripping rod 23. At this time, the stripping rod 23 pushes the blank out of the counter-extrusion die 25, and the upper die 15 continues to move upward, and the stripping rod 23 remains in this position, waiting for the robot to clamp the blank. The upper template 15 moves up to the upper dead center of the slider, and then the upper template 15 starts the next work and starts to descend. The upper template 15 descends to the set distance position and is clamped with the stripping rod 23 again and continues to descend with the upper template 15, and this is repeated.

[0022] like Figure 2 As shown, the lower end of the clamping shaft 11 is a touch rod 37, and the touch rod 37 is a threaded spiral telescopic rod, which is used together with the stripper rod limit bolt 35 to adjust the locking and unlocking distance. The outer surface of the touch rod 37 is threadedly connected to the touch rod limit bolt 43, and the distance between the touch rod 37 and the lower limit platform 39 can be adjusted by the touch rod limit bolt 43. The touch rod 37 should be adjusted synchronously with the stripper rod 23.

[0023] The working process of the present invention is as follows: start the crank press, the crank press drives the upper template 15 downward, the upper template 15 drives the clamping shaft 11 downward, when the touch rod 37 at the bottom of the clamping shaft 11 contacts the lower limit platform 39, the clamping shaft 11 stops moving downward, and the clamping body 10 on the thin axis of the clamping shaft 11 follows the upper template 15 downward, when the clamping body 10 is about to reach the step axis from the thin axis of the clamping shaft 11, a part of the clamping body 10 close to one end of the stripping rod 23 has slipped into the annular groove 231 of the stripping rod 23, and as the upper template 15 continues to descend, one end of the clamping body 10 is on the step axis, and the other end When one end of the clamp body 10 reaches the thick axis of the clamp shaft 11 in the annular groove 231 of the stripping rod 23, the other end of the clamp body 10 is clamped in the annular groove 231 of the stripping rod 23, and the upper template 15 and the stripping rod 23 are locked by the clamp body 10. The upper template 15 and the stripping rod 23 move down together to the bottom dead point of the slider and then move up together to the bottom of the stripping rod 23 to touch the rod 37 and is about to separate from the lower limit platform 39. The upper template 15 continues to move upward, and one end of the clamp body 10 slides upward in the annular groove 231 of the stripping rod 23, and the other end slides upward on the thick axis of the clamp shaft 11. When one end of the clamp body 10 is about to reach the clamp When the clamping shaft 11 is thin, the other end of the clamping body 10 completely leaves the annular groove 231 of the stripping rod 23. When one end of the clamping body 10 reaches the thin axis of the clamping shaft 11, the other end of the clamping body 10 is separated from the stripping rod 23, and the upper template 15 is unlocked from the stripping rod 23. At this time, the stripping rod 23 pushes the blank out of the counter-extrusion die 25, and the upper die 15 continues to move up with the clamping shaft 11, and the stripping rod 23 remains in this position, waiting for the robot to clamp the blank. The upper template 15 moves up to the top dead center of the slider, and then the upper template 15 starts the next work and starts to descend. The upper template 15 descends to the set distance position and then Once it is clamped with the stripper rod 23 and continues to descend with the upper template 15, and this is repeated. The distance from the touch rod limit bolt 43 on the touch rod 37 to the lower limit platform 39 matches the distance from the stripper rod limit bolt 35 on the stripper rod 23 to the lower template 2. The touch rod 37 should be adjusted synchronously with the stripper rod 23 and the rotating shaft 31, that is, the length between the rotating shaft 31 and the lower ejector rod seat 32, the distance between the stripper rod limit bolt 35 and the pull rod washer 36, and the distance from the touch rod limit bolt 43 at the bottom of the touch rod 37 to the lower limit platform 39 are matched with each other. When one is adjusted, the remaining two should be adjusted at the same time.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. A bearing ring reverse extrusion stripping position variable device, comprising a crank press frame, an upper template of the crank press and a reverse extrusion punch fixed to the upper template, a lower template of the crank press and a concave die set on the lower template, a ejector rod under the concave die, the lower end of the ejector rod abuts against a swing beam, one end of the swing beam is hinged on the frame, and the other end of the swing beam is connected to the lower end of the stripping rod, characterized in that: A positioning locking and unlocking mechanism is arranged between the upper part of the stripper rod and the upper template, so that when the upper template moves down from the top to a set distance, the upper template and the stripper rod are locked, and when the upper template and the stripper rod move down to the lower dead point of the slider together and then move up to the set distance position together, the upper template and the stripper rod are unlocked, the upper template moves up, the stripper rod no longer moves up, and the upper template moves up to the upper dead point of the slider, and this cycle repeats; The positioning locking and unlocking mechanism is a guide tube fixed to the upper template, the guide tube is sleeved to fix the clamp body bracket, two clamping plates are hingedly arranged opposite to each other on the clamp body bracket to form a clamp body, the left clamp head of the clamp body goes deep into the guide tube, and is clamped and matched with or disengaged from the stripper rod, and the right clamp head of the clamp body goes deep into the sliding sleeve on the right side of the clamp body bracket, and the sliding sleeve is penetrated by the clamp shaft, and the clamp shaft is a stepped shaft with a thin top and a thick bottom, and the stepped surface is a conical surface; The top of the lower workbench is fixedly connected with a lower template; The lower limit table is arranged on the lower working table and corresponds vertically to the clamping axis; The outer surface of the stripping rod is threadedly connected with a stripping rod limiting bolt, and the outer surface of the stripping rod is sleeved with a stripping rod supporting spring; The upper template and the stripper rod are set to move down to the bottom dead center of the slider together and then move up to the set distance position together, so that the stripper rod participates in a part of the circulation path of the crank press slider from the top dead center of the slider to the bottom dead center of the slider. When the upper template descends to the set position, the clamp body clamps and locks the stripper rod, and then it descends to the bottom dead center of the slider. Then, the upper template continues to move up with the stripper rod locked by the clamp body to the set position, and the stripper rod is separated from the upper template. The upper template continues to move up, and the stripper rod maintains the height of pushing the blank out of the die until the next time the upper template locks the stripper rod and moves it down.

2. The bearing ring reverse extrusion stripping position variable device according to claim 1, characterized in that: The lower end of the clamping shaft is a touch rod, which is a threaded spiral telescopic rod and is used together with the stripper rod limit bolt to adjust the locking and unlocking distance; the outer surface of the touch rod is threadedly connected to the touch rod limit bolt, and the distance from the touch rod limit bolt on the touch rod to the lower limit platform matches the distance from the stripper rod limit bolt on the stripper rod to the lower template.

3. The bearing ring reverse extrusion stripping position variable device according to claim 2, characterized in that: The hinge shaft of the swing beam hinged on the frame is fixed on the slider of the guide rail pair, and a locking bolt is arranged between the slider and the guide rail.

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