A connecting rod punching apparatus

Abstract

The application provides a connecting rod punching equipment and belongs to the technical field of punching equipment. The connecting rod punching equipment can improve the processing efficiency and processing quality.

Description

Technical Field

[0001] The invention belongs to the technical field of punching equipment and relates to a connecting rod punching equipment. Background Art

[0002] Connecting rods are transmission components commonly used in the mechanical field. They are usually long and have two annular parts at both ends of the connecting rod. Both annular parts have through holes for connection. Connecting rods are usually connected to other components through a rotating shaft. However, some transmission mechanisms require transmission rods with shapes such as L-shaped and V-shaped. In order to reduce costs, two connecting rods can be connected and then fixed circumferentially to obtain a transmission rod with a corresponding angle. This is more flexible and has better versatility. In order to achieve circumferential fixation of the connecting rod, meshing teeth are set circumferentially along the edge of the through hole at one end of the connecting rod. Circumferential fixation is achieved through the meshing teeth, such as Figure 12 and 13 As shown, the end of the connecting rod 10 has a through hole 101, the hole edge of one end of the through hole 101 has meshing teeth 102 in the circumferential direction, and the hole edge of the other end has a bevel chamfer 103.

[0003] For the connecting rod with the above-mentioned integrated structure, a punching machine is usually used to punch through holes in batches during processing, and then the punched semi-finished products are transported to a gear pressing machine for gear pressing. The connecting rod is then transported to a chamfering device for chamfering. The three processes need to be processed separately on three devices, with low processing efficiency. In addition, the connecting rod needs to be repeatedly positioned, and the deviation of the positioning reference will also cause processing errors and affect the quality. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems in the existing technology and to propose a connecting rod punching device, which can improve processing efficiency and processing quality.

[0005] The object of the present invention can be achieved through the following technical solutions: a connecting rod punching equipment, comprising a frame and a processing platform horizontally fixed on the frame, the frame is provided with a knife rod that can be lifted up and down vertically above the processing platform, the lower end of the knife rod is fixed with a punching knife that is cylindrical and has a cutting edge at the lower end, and the character is that the outer fixed sleeve of the punching knife is provided with a ring-shaped tooth-pressing knife with a cutting edge facing downward, the cutting edge of the tooth-pressing knife is higher than the cutting edge of the punching knife, the processing platform is provided with a circular and upward-opening giving groove below the punching knife, and an annular chamfering knife with a cutting edge facing upward is connected to the inner wall of the giving groove along the circumferential direction. The bottom of the tool rod is also vertically connected with a push rod that can press the pressing seat downward when the punching knife is inserted into the give way groove. A transmission structure is provided between the chamfering knife and the give way groove wall, which can make the chamfering knife rotate circumferentially when the chamfering knife moves upward under the push of the transmission inclined surface.

[0006] During the punching process, the long strip-shaped connecting rod is placed flat on the side of the processing platform so that the position of the connecting rod that needs to be punched is opposite to the clearance groove and the punching knife above it. The tool rod descends so that the punching knife at the lower end punches the connecting rod downward. Since the cutting edge of the tooth-pressing knife is higher than the cutting edge of the punching knife, and the chamfering knife is located in the clearance groove, only the punching knife generates a downward punching force on the connecting rod until the solid part of the connecting rod located inside the punching knife is punched out, forming a through hole on the connecting rod. As the tool rod continues to descend, the tooth-pressing knife gradually contacts the edge of the upper hole of the connecting rod and squeezes downward, while the push rod at the lower end of the tool rod presses down on the disc-shaped solid waste that has been punched out, causing the waste to press down on the pressing seat, and the pressing seat presses downward. When moving downward, it can press on the transmission inclined surface at the inner end of the transmission block, thereby pushing the transmission block radially outward, and the transmission block pushes the chamfering knife upward through the transmission inclined surface at the outer end, so that the chamfering knife presses upward on the edge of the lower hole opening of the connecting rod through hole, and when the chamfering knife is lifted upward, it rotates synchronously circumferentially under the action of the transmission structure, so that the chamfering knife cuts along the edge of the lower hole opening of the connecting rod through hole, and when the tool rod drops into place, the tooth pressing knife forms a circle of meshing teeth on the edge of the upper hole opening of the connecting rod through hole, and the chamfering knife forms a ring-shaped inclined chamfer on the edge of the lower hole opening of the connecting rod through hole. The present application utilizes the push rod, pressing seat, and transmission block on the tool rod to transmit the driving force of the tool rod above the connecting rod to the chamfering knife below the connecting rod, thereby achieving the punching of the connecting rod by the punching knife, the pressing of the teeth by the tooth-pressing knife, and the chamfering of the connecting rod by the chamfering knife through the lowering of the tool rod. This allows the connecting rod to be loaded to one workstation and the three processes to be processed using one driving source, without the need to change the workstation of the connecting rod, thereby improving processing efficiency and ensuring the continuity of processing. In particular, when the punching knife punches a through hole downwardly on the connecting rod, the downward punching force causes the lower edge of the hole of the connecting rod to have downwardly protruding burrs, etc., while the present application sets the chamfering knife below the connecting rod, thereby being able to chamfer the end with burrs after punching, thereby improving product quality. Furthermore, the tooth pressing cutter and the chamfering cutter apply force to the upper and lower sides of the connecting rod synchronously. The chamfering cutter will generate circumferential torque on the connecting rod. At this time, the tooth pressing cutter is pressed into the tooth mark on the upper side of the connecting rod, which can play a role in circumferential positioning of the connecting rod, avoiding the connecting rod from deflecting under the action of the chamfering cutter, ensuring stability during processing, and thus ensuring processing quality.

[0007] In the above-mentioned connecting rod punching equipment, a plurality of radially arranged guide grooves are provided on the bottom surface of the give way groove, and the plurality of guide grooves are evenly distributed along the circumference. There are a plurality of transmission blocks in the shape of long strips, and the plurality of transmission blocks are slidably connected in the plurality of guide grooves respectively. The two transmission inclined surfaces are respectively located at the two ends of the transmission block, and the spacing between the two transmission inclined surfaces gradually decreases from bottom to top. The processing platform is also provided with a spring 1 acting on the transmission block along the radial direction of the give way groove, and under the action of the spring 1, the bottom of the pressing seat is opposite to the upper end of the transmission inclined surface at the inner end of the transmission block, and the bottom of the chamfering knife is against the lower end of the transmission inclined surface at the outer end of the transmission block. The guide groove guides the transmission block to ensure that it remains stable under the driving force of the guide block. The pressing seat slides downward from the upper end of the transmission inclined surface at the inner end of the transmission block. The transmission block compresses spring 1 and slides outward. The transmission inclined surface at the outer end of the transmission block slides relative to the chamfering cutter, so that the chamfering cutter slides upward from the lower end of the push inclined surface to achieve lifting. After the processing is completed, the pressing seat rises and resets, and the transmission block resets and slides inward under the action of spring 1.

[0008] In the above-mentioned connecting rod punching device, the pressing seat is cylindrical, and the lower end of the pressing seat has a pressing cone surface with a small end facing downward and opposite to the transmission inclined surface. The lower edge of the chamfering knife has a plurality of abutting protrusions along the circumference, and the lower end surfaces of the plurality of abutting protrusions are arcuate surfaces. The wall of the said clearance groove is also provided with a plurality of clearance holes opposite to the abutting protrusions. The outer end of the transmission block passes from under the abutting protrusion and can extend into the clearance hole, and the lower end surface of the abutting protrusion is pressed downward against the lower end of the transmission inclined surface. The spring 1 is arranged in the clearance hole, and one end of the spring 1 is pressed against the bottom surface of the clearance hole, and the other end is pressed against the end surface of the transmission block. The lower end of the pressing seat has a pressing cone surface, and the pressing cone surface is pressed against the transmission inclined surface, making the transmission smoother. The chamfering knife is pressed against the transmission inclined surface through the arcuate surface of the abutting protrusion, and the two are in line contact, which reduces the friction resistance when the chamfering knife rotates.

[0009] In the above-mentioned connecting rod punching equipment, the processing platform is also provided with a plurality of support blocks connected to the radial sliding connection along the give way groove, and the plurality of support blocks are evenly distributed along the circumference of the give way groove. The upper side surface of the support block is flush with the side surface of the processing platform, and the inner end surfaces of the plurality of support blocks are arc surfaces. The processing platform is also provided with a spring 2 that can make the inner end of the support block protrude inward from the wall of the give way groove, and when the plurality of support blocks protrude from the wall of the give way groove, the inner end surfaces of the plurality of support blocks and the outer circumferential surface of the punching knife are located on the same cylindrical surface. The support block is also connected to a push block located in the give way groove. When the punching knife is inserted into the give way groove, the pressing cone surface of the pressing seat can push the push block radially outward, and when the pressing cone surface contacts the transmission inclined surface of the transmission block, the support block moves until the inner end surface does not protrude from the wall of the give way groove. Since the connecting rod needs to chamfer the edge of the hole with a chamfering tool in the clearance groove after punching, the diameter of the through hole on the connecting rod is smaller than the inner diameter of the clearance groove, that is, the edge of the through hole on the connecting rod protrudes radially inward from the wall of the clearance groove, which causes the edge of the through hole of the connecting rod to deform downward when the punching tool punches downward due to lack of support from the processing platform. For this reason, the present application also has a number of support blocks slidably connected to the processing platform. When not punching, the support blocks protrude radially inward from the wall of the clearance groove under the action of spring 2, and the inner end arc surfaces of the several support blocks are located on the same cylindrical surface, and their hole diameters are the same as those on the connecting rod. The apertures of the through holes after punching are consistent, so the edge of the connecting rod through hole can be supported when the punching knife is punching, avoiding downward deformation of this part. After the punching is completed, the pressing seat first contacts the support block and pushes the support block. At this time, the tooth pressing knife has not yet contacted the connecting rod, and the pressing seat has not yet contacted the transmission block. Until the support block completely withdraws from the clearance groove, the pressing seat further pushes the transmission block, thereby avoiding the support block from interfering with the lifting and rotation of the chamfering knife. Through the setting of the support block, the punching knife can support the edge of the connecting rod through hole while ensuring the normal chamfering of the chamfering knife, thereby ensuring the processing quality.

[0010] In the above-mentioned connecting rod punching equipment, a plurality of slide grooves are provided on the side surface of the processing platform along the radial direction of the give way groove, and the plurality of slide grooves are evenly distributed along the circumference of the give way groove, and the inner ends of the slide grooves pass through the wall of the give way groove, and a plurality of support blocks are slidably connected in the plurality of slide grooves respectively, and the wall of the give way groove is provided with a plurality of guide channels along the radial direction below the slide groove, and the slide groove and the guide channel are connected through a vertical channel at one end away from the give way groove, and the push block is long and slidably passed through the guide channel, one end of the push block extends into the vertical channel and is fixedly connected to the support block through the vertical rod body, and the other end of the push block extends into the give way groove, and the other end of the push block has a pushing inclined surface opposite to the pressing cone surface, and the distance between the pushing inclined surface and the pressing cone surface is smaller than the distance between the transmission inclined surface and the pressing cone surface. The slide is a T-shaped groove, so that the support block is limited in the slide, with a higher load-bearing capacity. The pressing seat pushes the support block through the push block, and the distance between the pushing inclined surface and the pressing cone surface is smaller than the distance between the transmission inclined surface and the pressing cone surface, ensuring that the pressing seat presses the pushing inclined surface first to make the support block exit the give way groove, and then presses the transmission inclined surface to lift the chamfering knife to avoid collision between the chamfering knife and the support block, thereby ensuring reliability.

[0011] In the above-mentioned connecting rod punching device, a cylindrical mounting seat is provided on the bottom surface of the clearance groove, and the mounting seat is coaxially arranged with the clearance groove. The upper edge of the mounting seat is bent inward to form a limiting flange. The outer peripheral surface of the pressing seat is circumferentially provided with an annular limiting ridge. The pressing seat is vertically slidably inserted into the mounting seat, and the limiting ridge is located below the limiting ridge. A spring three is provided between the bottom surface of the pressing seat and the bottom surface of the clearance groove. Under the action of the spring three, the limiting ridge presses upward against the limiting ridge, and the upper end of the pressing seat extends upward from the mounting seat. A plurality of guide holes are opened circumferentially on the side wall of the mounting seat, and the transmission block and push block slide through the plurality of guide holes respectively. The pressing seat is limited in the mounting seat, and the mounting seat guides and limits the transmission block and push block through the guide holes to ensure the transmission stability between the pressing seat, the transmission block and the push block. After the punching is completed, the pressing seat is reset upward under the action of the spring three.

[0012] In the above-mentioned connecting rod punching device, the transmission structure includes a plurality of long strip-shaped inclined grooves formed on the wall of the clearance groove, the upper ends of the plurality of inclined grooves are inclined to one side along the circumference of the clearance groove, the outer peripheral wall of the chamfering cutter is provided with a plurality of radially protruding guide posts, the plurality of guide posts are respectively slidably inserted into the inclined groove, the upper edge of the chamfering cutter is provided with a plurality of upwardly protruding mounting portions along the circumference, and a blade is fixed on each mounting portion, the blade having an upwardly inclined cutting edge, when the pressing cone surface does not contact the transmission inclined surface, the guide post is located at the lower end of the inclined groove, when the guide post moves to the upper end of the inclined groove, the cutting edge of the blade is higher than the upper side surface of the processing platform. When the chamfering cutter is not punching, the guide post is suspended at the lower end of the inclined groove under the action of gravity, when the pressing seat pushes the transmission block, the transmission block lifts the chamfering cutter, the guide post slides along the inclined groove, and the chamfering cutter rotates circumferentially under the guidance of the inclined groove.

[0013] In the above-mentioned connecting rod punching device, the connecting rod punching device also includes an annular positioning seat, a connecting sleeve is provided on the upper side of the positioning seat, a limit pin is provided on the inner wall of the connecting sleeve, a slot is vertically provided at the lower end of the knife bar, and a long strip-shaped limit slot is vertically provided on the side wall of the slot. The connecting sleeve is vertically slidably inserted into the slot, and the limit pin is inserted into the limit slot. When the limit pin is located at the lower end of the limit slot, the lower side of the positioning seat is lower than the cutting edge of the punching knife. A spring 4 is also provided in the slot that acts downward on the top of the connecting sleeve. When the knife bar descends, the positioning seat first presses downward on the upper side of the connecting rod to position the connecting rod, and then the punching knife punches downward, which can ensure the stability of the connecting rod during punching, tooth pressing and chamfering, thereby improving the processing quality.

[0014] In the aforementioned connecting rod punching device, the bottom of the cutter bar has a vertically downwardly disposed guide tube, the upper end of the push rod is slidably inserted into the guide tube, and a spring 5 is disposed within the guide tube. The upper end of the spring 5 is fixedly connected to the cutter bar, and the lower end is fixedly connected to the upper end of the push rod. A pressure plate is horizontally fixed to the lower end of the push rod, and the pressure plate is located inside the punching knife. When the punching knife punches downward, the solid waste material in the through hole of the connecting rod will be embedded in the punching knife and press the pressure plate upward. The pressure plate compresses the spring 5 to store energy and provide the force to press the pressing seat downward. When the processing is completed and the cutter bar is lifted upward and reset, the solid waste material in the punching knife can be ejected from the punching knife under the action of the spring 5, without the need for manual operation.

[0015] In the connecting rod punching equipment described above, a backrest is fixed on the side of the processing platform on one side of the clearance groove. The backrest has two arc-shaped grooves that can adapt to the connecting rod on the edge facing the clearance groove. A storage rack is fixed on the side of the processing platform on the other side of the clearance groove. The bottom of the storage rack has a discharge gap set towards the clearance groove. A loading cylinder that can push the connecting rod in the storage rack to the top of the clearance groove is also provided on the processing platform. The connecting rods to be processed are stacked in the storage rack. The vertical width of the discharge gap is slightly larger than the thickness of the connecting rod. The loading cylinder can push the lowest connecting rod out of the discharge gap and push it to abut against the backrest. The arc-shaped grooves on the backrest can adapt to the outer circular side walls at both ends of the connecting rod, so the position of the connecting rod can be corrected to ensure processing accuracy.

[0016] Compared with the existing technology, this connecting rod punching equipment has the following advantages:

[0017] 1. The application utilizes the top rod, pressing seat and transmission block on the cutter bar to transmit the driving force of the cutter bar above the connecting rod to the chamfering cutter below the connecting rod, so that the punching of the punching cutter, the tooth pressing of the tooth pressing cutter and the chamfering of the chamfering cutter on the connecting rod are realized by the descent of one cutter bar, the three processes are realized by one driving source when the connecting rod is fed to one station, the connecting rod does not need to change the station, the processing efficiency is improved, and the continuity of processing is ensured.

[0018] 2. When the connecting rod is punched downward by the punching cutter, the downward punching force will cause the lower hole edge of the connecting rod to have downward protruding burrs, etc., and the chamfering cutter is arranged below the connecting rod, so that the end with burrs after punching can be chamfered, and the product quality is improved.

[0019] 3. Since the tooth pressing cutter and the chamfering cutter simultaneously apply force to the upper and lower sides of the connecting rod, the chamfering cutter will generate a circumferential torsion on the connecting rod, and at this time the tooth pressing cutter is pressed in the tooth mark on the upper side of the connecting rod, which can function as a circumferential positioning of the connecting rod, avoiding the deflection of the connecting rod under the action of the chamfering cutter, ensuring the stability during processing, and further ensuring the processing quality.

[0020] 4. The application further comprises a plurality of supporting blocks connected to the processing platform, which can support the edge part of the connecting rod hole during punching by the punching cutter, avoiding the downward deformation of the part, and after the punching is completed, the pressing seat first contacts and pushes the pushing block of the supporting block, until the supporting block completely exits the gap, and the pressing seat further pushes the transmission block, thereby avoiding the interference of the supporting block with the lifting and rotation of the chamfering cutter. Through the arrangement of the supporting block, the supporting of the edge part of the connecting rod hole by the punching cutter is realized under the condition of normal chamfering of the chamfering cutter, ensuring the processing quality. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of the structure of the connecting rod punching device.

[0022] Figure 2 is a structural top view of the connecting rod punching device.

[0023] Figure 3 is Figure 2 the partial structure sectional view of A-A in

[0024] Figure 4 is Figure 3 the structural enlarged view of B in

[0025] Figure 5 is Figure 1 the structural enlarged view of C in

[0026] Figure 6 is Figure 3 the structural enlarged view of D in

[0027] Figure 7 It is an exploded diagram of the local structure of the connecting rod punching equipment.

[0028] Figure 8 This is a process diagram when the punching knife comes into contact with the upper side of the connecting rod during its descent.

[0029] Figure 9 It is a schematic diagram of the process when the punching knife punches out a through hole in the connecting rod.

[0030] Figure 10 It is a schematic diagram of the process when the pressing seat pushes the support block out of the clearance groove.

[0031] Figure 11 It is a schematic diagram of the process of chamfering and tooth pressing by a chamfering cutter and a tooth pressing cutter respectively.

[0032] Figure 12 It is a schematic diagram of the three-dimensional structure of the connecting rod.

[0033] Figure 13 This is a three-dimensional structural diagram of the connecting rod from another perspective.

[0034] In the figure, 1, frame; 11, processing platform; 12, clearance groove; 121, guide groove; 122, inclined groove; 13, clearance hole; 14, slide; 15, vertical channel; 16, guide channel; 17, mounting seat; 171, limit flange; 172, guide hole; 18, storage rack; 181, discharge gap; 182, feeding cylinder; 19, driving cylinder; 2, tool bar; 21, punching knife; 22, tooth pressing knife; 23, guide tube; 24, ejector rod; 241, pressure plate; 25, slot; 26, limit groove; 3, chamfering knife; 31, stop 3. Support convex portion; 32. Mounting portion; 33. Blade; 34. Guide column; 4. Press seat; 41. Press cone; 42. Limit convex edge; 5. Transmission block; 51. Transmission inclined surface; 6. Support block; 61. Vertical rod; 62. Push block; 621. Push inclined surface; 7. Positioning seat; 71. Connecting sleeve; 72. Limit pin; 8. Backrest; 81. Arc groove; 9a. Spring 1; 9b. Spring 2; 9c. Spring 3; 9d. Spring 4; 9e. Spring 5; 10. Connecting rod; 101. Through hole; 102. Engaging teeth; 103. Bevel chamfer. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0036] like Figure 1 、 Figure 2 、 Figure 3As shown, a connecting rod punching device includes a frame 1 and a processing platform 11 fixed horizontally on the frame 1. A driving cylinder 19 is vertically fixed on the top of the frame 1. A tool rod 2 is provided on the frame 1 for vertical sliding above the processing platform 11. The piston rod of the driving cylinder 19 is fixedly connected to the upper end of the tool rod 2. Figure 4 、 Figure 5 、 Figure 6 As shown, a punching knife 21 with a cylindrical shape and a cutting edge at the lower end is fixed at the lower end of the knife rod 2, and a ring-shaped pressing knife 22 with a cutting edge facing downward is fixedly sleeved on the outer side of the punching knife 21. The cutting edge of the pressing knife 22 is a circumferentially uniform pressing tooth, and the cutting edge of the pressing knife 22 is higher than the cutting edge of the punching knife 21. The processing platform 11 is provided with a circular and upward-opening giving groove 12 below the punching knife 21. A ring-shaped and upward-opening chamfering knife 3 is connected to the inner wall of the giving groove 12 in a circumferential direction. The chamfering knife 3 is arranged to slide vertically. When the punching knife 21 is inserted into the giving groove 12, the chamfering knife 3 is located at the outer wall of the punching knife 21 and the giving groove is aligned with the outer wall of the punching knife 21. Between the walls of the positioning groove 12, a pressing seat 4 is also provided in the middle of the giving way groove 12 for vertical sliding. A transmission block 5 is also connected to the bottom surface of the giving way groove 12 for radial sliding. Both ends of the transmission block 5 have transmission inclined surfaces 51. The bottom of the pressing seat 4 and the bottom of the chamfering knife 3 respectively lean downward on the two transmission inclined surfaces 51. The bottom of the tool rod 2 is also fixed vertically with a push rod 24 that can press the pressing seat 4 downward when the punching knife 21 is inserted downward into the giving way groove 12. A transmission structure is provided between the chamfering knife 3 and the wall of the giving way groove 12, which can make the chamfering knife 3 rotate circumferentially when the chamfering knife 3 moves upward under the push of the transmission inclined surface 51.

[0037] Specifically, combined Figure 7As shown, a plurality of radially arranged guide grooves 121 are provided on the bottom surface of the give way groove 12, and the plurality of guide grooves 121 are evenly distributed along the circumferential direction. There are a plurality of transmission blocks 5 in the shape of long strips, and the plurality of transmission blocks 5 are slidably connected in the plurality of guide grooves 121, respectively. The two transmission inclined surfaces 51 are respectively located at the two ends of the transmission block 5, and the spacing between the two transmission inclined surfaces 51 gradually decreases from bottom to top. The processing platform 11 is also provided with a spring 9a acting on the transmission block 5 along the radial direction of the give way groove 12, and under the action of the spring 9a, the bottom of the pressing seat 4 is opposite to the upper end of the transmission inclined surface 51 at the inner end of the transmission block 5, and the bottom of the chamfering knife 3 is against the lower end of the transmission inclined surface 51 at the outer end of the transmission block 5. The pressing seat 4 is cylindrical, and the lower end of the pressing seat 4 has a pressing cone surface 41 with the small end facing downward and opposite to the transmission inclined surface 51. The lower edge of the chamfering knife 3 has a plurality of abutting protrusions 31 in the circumferential direction. The lower end surfaces of the plurality of abutting protrusions 31 are arc surfaces. The groove wall of the give way groove 12 is also provided with a plurality of give way holes 13 opposite to the abutting protrusions 31 one by one. The outer end of the transmission block 5 passes through from under the abutting protrusion 31 and extends into the give way hole 13, and the lower end surface of the abutting protrusion 31 rests downward on the lower end of the transmission inclined surface 51. The spring 19a is arranged in the give way hole 13, and one end of the spring 19a rests on the inner bottom surface of the give way hole 13, and the other end rests on the end surface of the transmission block 5. The processing platform 11 is also provided with a plurality of support blocks 6 that are radially slidably connected along the give way groove 12. The plurality of support blocks 6 are evenly distributed along the circumference of the give way groove 12. The upper side surface of the support block 6 is flush with the upper side surface of the processing platform 11. The inner end surfaces of the plurality of support blocks 6 are arc surfaces. The processing platform 11 is also provided with a spring 2 9b that can make the inner end of the support block 6 protrude inward from the groove wall of the give way groove 12. When the plurality of support blocks 6 protrude from the groove wall of the give way groove 12, the inner end surfaces of the plurality of support blocks 6 and the outer circumferential surface of the punching knife 21 are located on the same cylindrical surface. The support block 6 is also connected to a push block 62 located in the give way groove 12. When the punching knife 21 is inserted into the give way groove 12, the pressing cone surface 41 of the pressing seat 4 can push the push block 62 radially outward, and when the pressing cone surface 41 contacts the transmission inclined surface 51 of the transmission block 5, the support block 6 moves until the inner end surface does not protrude from the groove wall of the give way groove 12. The upper side surface of the processing platform 11 is provided with a plurality of slide grooves 14 arranged radially along the give way groove 12. The plurality of slide grooves 14 are evenly distributed along the circumference of the give way groove 12, and the inner ends of the slide grooves 14 pass through the groove wall of the give way groove 12, and the plurality of support blocks 6 are slidably connected in the slide groove 14 respectively. The groove wall of the give way groove 12 is radially provided with a plurality of guide channels 16 below the slide groove 14. The slide groove 14 and the guide channel 16 are connected through the vertical channel 15 at one end away from the give way groove 12. The push block 62 is long and slides through the guide channel 16. One end of the push block 62 extends into the vertical channel 15 and is fixedly connected to the support block 6 through the vertical rod body 61. The other end of the push block 62 extends into the give way groove 12, and the other end of the push block 62 has a pushing inclined surface 621 opposite to the pressing cone surface 41. The distance between the pushing inclined surface 621 and the pressing cone surface 41 is smaller than the distance between the transmission inclined surface 51 and the pressing cone surface 41.A cylindrical mounting seat 17 is provided on the bottom surface of the give way groove 12, and the mounting seat 17 is coaxially arranged with the give way groove 12. The upper edge of the mounting seat 17 is bent inward to form a limiting flange 171. The outer peripheral surface of the pressing seat 4 is circumferentially provided with an annular limiting ridge 42. The pressing seat 4 is vertically slidably inserted into the mounting seat 17, and the limiting ridge 42 is located below the limiting flange 171. A spring three 9c is provided between the bottom surface of the pressing seat 4 and the bottom surface of the give way groove 12. Under the action of the spring three 9c, the limiting ridge 42 is upwardly pressed against the limiting flange 171, and the upper end of the pressing seat 4 extends upward from the mounting seat 17. A plurality of guide holes 172 are opened circumferentially on the side wall of the mounting seat 17, and the transmission block 5 and the push block 62 slide through the plurality of guide holes 172 respectively. The transmission structure includes a plurality of long strip-shaped inclined grooves 122 provided on the wall of the give way groove 12, and the upper ends of the plurality of inclined grooves 122 are inclined to one side along the circumference of the give way groove 12, and the outer peripheral wall of the chamfering cutter 3 is provided with a plurality of radially protruding guide columns 34, and the plurality of guide columns 34 are respectively slidably inserted into the inclined groove 122, and the upper edge of the chamfering cutter 3 is provided with a plurality of upwardly protruding mounting portions 32 along the circumference, and a blade 33 is fixed on the mounting portion 32, and the blade 33 has an upward and inclined cutting edge. When the pressing conical surface 41 does not contact the transmission inclined surface 51, the guide column 34 is located at the lower end of the inclined groove 122, and when the guide column 34 moves to the upper end of the inclined groove 122, the cutting edge of the blade 33 is higher than the upper side surface of the processing platform 11.

[0038] The connecting rod punching equipment also includes an annular positioning seat 7, which has a connecting sleeve 71 on the upper side of the positioning seat 7, and a limit pin 72 on the inner wall of the connecting sleeve 71. A slot 25 is vertically opened at the lower end of the knife rod 2, and a long strip of limit groove 26 is vertically opened on the side wall of the slot 25. The connecting sleeve 71 slides vertically and is inserted into the slot 25, and the limit pin 72 is inserted into the limit groove 26. When the limit pin 72 is located at the lower end of the limit groove 26, the lower side of the positioning seat 7 is lower than the cutting edge of the punching knife 21. A spring four 9d is also provided in the slot 25 to act downward on the top of the connecting sleeve 71. The bottom of the cutter bar 2 has a guide tube 23 arranged vertically downward. The upper end of the push rod 24 is slidably inserted into the guide tube 23. A spring 5 9e is provided in the guide tube 23. The upper end of the spring 5 9e is fixed to the cutter bar 2, and the lower end is fixed to the upper end of the push rod 24. A pressure plate 241 is fixed horizontally to the lower end of the push rod 24. The pressure plate 241 is located inside the punching knife 21. A backrest 8 is fixed to the upper side of the processing platform 11 on one side of the clearance groove 12. The backrest 8 has two arc-shaped grooves 81 facing the edge of the clearance groove 12 that can adapt to the connecting rod 10. A storage rack 18 is fixed to the upper side of the processing platform 11 on the other side of the clearance groove 12. The bottom of the storage rack 18 has a discharge gap 181 arranged towards the clearance groove 12. The processing platform 11 is also provided with a loading cylinder 182 that can push the connecting rod 10 in the storage rack 18 to the top of the clearance groove 12.

[0039] During punching, the feeding cylinder 182 pushes the lowest connecting rod 10 in the storage rack 18 to abut against the backrest 8. At this time, the connecting rod 10 is located above the clearance groove 12, and the driving cylinder 19 drives the tool rod 2 to descend. Figure 8 As shown, the positioning seat 7 is first pressed downward on the upper side of the connecting rod 10 to position the connecting rod 10. Figure 9 As shown, the cutter bar 2 is further lowered, and the punching knife 21 punches out a through hole 101 on the connecting rod 10, and the solid waste punched out is embedded in the inner side of the punching knife 21 and presses the pressure plate 241. Figure 10 As shown, the cutter bar 2 continues to descend, and the pressure plate 241 presses the pressing seat 4 downward through the solid waste, and the pressing seat 4 pushes the pushing block 62, so that the supporting block 6 exits the clearance groove 12, while the pressing seat 4 and the transmission block 5 have not yet contacted. Figure 11 As shown, the tool rod 2 continues to descend, and the toothed edge of the lower side of the pressure cutter 22 presses down the edge of the upper hole 101 of the connecting rod 10, and the pressing seat 4 pushes the transmission block 5. The transmission block 5 lifts the chamfering cutter 3, and the chamfering cutter 3 rotates under the action of the guide column 34, and cuts a bevel chamfer 103 at the edge of the lower hole 101 of the connecting rod 10 through the blade 33.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0041] Although the terms "machine frame 1," "processing platform 11," and "relief slot 12" are frequently used herein, the use of other terms is not excluded. These terms are used merely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A connecting rod punching device, comprising a frame (1) and a processing platform (11) horizontally fixed on the frame (1), wherein the frame (1) is provided with a knife rod (2) that can be raised and lowered vertically above the processing platform (11), and a punching knife (21) with a cylindrical shape and a cutting edge at the lower end thereof is fixed at the lower end of the knife rod (2), characterized in that: The outer fixed sleeve of the punching knife (21) is provided with a tooth-pressing knife (22) in the shape of an annular ring with a cutting edge facing downwards, and the cutting edge of the tooth-pressing knife (22) is higher than the cutting edge of the punching knife (21). The processing platform (11) is provided with a circular and upward-opening relief groove (12) below the punching knife (21). The inner wall of the relief groove (12) is connected to a chamfering knife (3) in the shape of an annular ring with a cutting edge facing upwards, and the chamfering knife (3) is arranged to slide vertically. When the punching knife (21) is inserted into the relief groove (12), the chamfering knife (3) is located between the outer wall of the punching knife (21) and the groove wall of the relief groove (12). The middle part of the relief groove (12) is also arranged to slide vertically. A pressing seat (4) is provided, and a transmission block (5) is radially slidably connected to the bottom surface of the clearance groove (12). Both ends of the transmission block (5) have transmission inclined surfaces (51). The bottom of the pressing seat (4) and the bottom of the chamfering knife (3) respectively lean downward against the two transmission inclined surfaces (51). The bottom of the knife rod (2) is also vertically connected to a push rod (24) that can press the pressing seat (4) downward when the punching knife (21) is inserted downward into the clearance groove (12). A transmission structure is provided between the chamfering knife (3) and the wall of the clearance groove (12). When the chamfering knife (3) moves upward under the push of the transmission inclined surface (51), the chamfering knife (3) can rotate circumferentially.

2. The connecting rod punching device according to claim 1, characterized in that: The bottom surface of the said clearance groove (12) is provided with a plurality of guide grooves (121) arranged in a radial direction, and the plurality of guide grooves (121) are uniformly distributed along the circumferential direction. The said transmission block (5) has a plurality of strip-shaped transmission blocks, and the plurality of transmission blocks (5) are respectively slidably connected in the plurality of guide grooves (121). The two transmission inclined surfaces (51) are respectively located at the two ends of the transmission block (5), and the spacing between the two transmission inclined surfaces (51) gradually decreases from bottom to top. The said processing platform (11) is also provided with a spring (9a) acting on the transmission block (5) along the radial direction of the clearance groove (12), and under the action of the spring (9a), the bottom of the pressing seat (4) is opposite to the upper end of the transmission inclined surface (51) at the inner end of the transmission block (5), and the bottom of the chamfering knife (3) is against the lower end of the transmission inclined surface (51) at the outer end of the transmission block (5).

3. The connecting rod punching device according to claim 2, characterized in that: The pressing seat (4) is cylindrical, and the lower end of the pressing seat (4) has a pressing cone surface (41) with a small end facing downward and opposite to the transmission inclined surface (51). The lower edge of the chamfering knife (3) has a plurality of abutting protrusions (31) along the circumference, and the lower end surfaces of the plurality of abutting protrusions (31) are arc surfaces. The groove wall of the said giving way groove (12) is also provided with a plurality of giving way holes (13) opposite to the abutting protrusions (31) one by one. The outer end of the transmission block (5) passes through from below the abutting protrusion (31) and can extend into the giving way hole (13), and the lower end surface of the abutting protrusion (31) abuts downward against the lower end of the transmission inclined surface (51). The spring (9a) is arranged in the giving way hole (13), and one end of the spring (9a) abuts against the inner bottom surface of the giving way hole (13), and the other end abuts against the end surface of the transmission block (5).

4. The connecting rod punching device according to claim 3, characterized in that: The processing platform (11) is also provided with a plurality of support blocks (6) which are radially slidably connected along the clearance groove (12). The plurality of support blocks (6) are evenly distributed along the circumference of the clearance groove (12). The upper side surface of the support block (6) is flush with the upper side surface of the processing platform (11). The inner end surfaces of the plurality of support blocks (6) are arc surfaces. The processing platform (11) is also provided with a spring 2 (9b) which can make the inner end of the support block (6) protrude inwardly from the wall of the clearance groove (12). The plurality of support blocks (6) protrude from the wall of the clearance groove (12). The inner end faces of the plurality of support blocks (6) and the outer peripheral face of the punching knife (21) are located on the same cylindrical face, and the support block (6) is further connected with a push block (62) located in the clearance groove (12). When the punching knife (21) is inserted into the clearance groove (12), the pressing cone surface (41) of the pressing seat (4) can push the push block (62) radially outward, and when the pressing cone surface (41) contacts the transmission inclined surface (51) of the transmission block (5), the support block (6) moves until the inner end face does not protrude from the wall of the clearance groove (12).

5. The connecting rod punching device according to claim 4, characterized in that: The upper side of the processing platform (11) is provided with a plurality of slide grooves (14) arranged radially along the give way groove (12), the plurality of slide grooves (14) are evenly distributed along the circumference of the give way groove (12), and the inner ends of the slide grooves (14) penetrate the groove wall of the give way groove (12), and the plurality of support blocks (6) are respectively slidably connected in the plurality of slide grooves (14), and the groove wall of the give way groove (12) is provided with a plurality of guide channels (16) radially below the slide groove (14), and the slide groove (14) and the guide channel (16) are connected vertically at one end away from the give way groove (12). The channel (15) is connected, the push block (62) is in the shape of a long strip and is slidably arranged in the guide channel (16), one end of the push block (62) extends into the vertical channel (15) and is fixedly connected to the support block (6) through the vertical rod body (61), the other end of the push block (62) extends into the clearance groove (12), and the other end of the push block (62) has a top pushing inclined surface (621) opposite to the pressing conical surface (41), and the distance between the top pushing inclined surface (621) and the pressing conical surface (41) is smaller than the distance between the transmission inclined surface (51) and the pressing conical surface (41).

6. The connecting rod punching device according to claim 5, characterized in that: The bottom surface of the said giving way groove (12) is provided with a cylindrical mounting seat (17), and the mounting seat (17) is arranged coaxially with the giving way groove (12). The upper edge of the said mounting seat (17) is bent inward to form a limiting flange (171). The outer peripheral surface of the said pressing seat (4) is provided with an annular limiting convex edge (42) in the circumferential direction. The pressing seat (4) is inserted into the mounting seat (17) along the vertical sliding direction, and the limiting convex edge (42) is located below the limiting flange (171). A spring three (9c) is provided between the bottom surface of the pressing seat (4) and the bottom surface of the giving way groove (12). Under the action of the spring three (9c), the limiting convex edge (42) is pressed upward against the limiting flange (171), and the upper end of the pressing seat (4) extends upward from the mounting seat (17). A plurality of guide holes (172) are provided on the side wall of the mounting seat (17) in the circumferential direction, and the transmission block (5) and the push block (62) slide through the plurality of guide holes (172) respectively.

7. The connecting rod punching device according to any one of claims 3 to 6, characterized in that: The transmission structure includes a plurality of long strip-shaped inclined grooves (122) provided on the groove wall of the clearance groove (12), the upper ends of the plurality of inclined grooves (122) are inclined to one side along the circumference of the clearance groove (12), the outer peripheral wall of the chamfering knife (3) is provided with a plurality of radially protruding guide posts (34), the plurality of guide posts (34) are respectively slidably inserted into the inclined groove (122), the upper edge of the chamfering knife (3) is provided with a plurality of upwardly protruding mounting portions (32) along the circumference, and a blade (33) is fixed on the mounting portion (32), the blade (33) has an upwardly facing and inclined cutting edge, when the pressing conical surface (41) does not contact the transmission inclined surface (51), the guide post (34) is located at the lower end of the inclined groove (122), and when the guide post (34) moves to the upper end of the inclined groove (122), the cutting edge of the blade (33) is higher than the upper side surface of the processing platform (11).

8. The connecting rod punching device according to any one of claims 1 to 6, characterized in that: The connecting rod punching device also includes an annular positioning seat (7), a connecting sleeve (71) is provided on the upper side of the positioning seat (7), and a limiting pin (72) is provided on the inner wall of the connecting sleeve (71). A slot (25) is vertically provided at the lower end of the knife rod (2), and a long strip-shaped limiting slot (26) is vertically provided on the side wall of the slot (25). The connecting sleeve (71) is vertically slidably inserted into the slot (25), and the limiting pin (72) is inserted into the limiting slot (26). When the limiting pin (72) is located at the lower end of the limiting slot (26), the lower side of the positioning seat (7) is lower than the cutting edge of the punching knife (21). A spring (9d) is also provided in the slot (25) to act downward on the top of the connecting sleeve (71).

9. The connecting rod punching device according to any one of claims 1 to 6, characterized in that: The bottom of the knife rod (2) is provided with a guide tube (23) vertically downwardly arranged, the upper end of the push rod (24) is slidably inserted into the guide tube (23), and a spring five (9e) is provided in the guide tube (23), the upper end of the spring five (9e) is fixedly connected to the knife rod (2), and the lower end is fixedly connected to the upper end of the push rod (24), and a pressure plate (241) is horizontally fixed to the lower end of the push rod (24), and the pressure plate (241) is located on the inner side of the punching knife (21).

10. The connecting rod punching device according to any one of claims 1 to 6, characterized in that: A backrest (8) is fixed on the upper side of the processing platform (11) at one side of the clearance groove (12), and the edge of the backrest (8) facing the clearance groove (12) has two arc grooves (81) that can adapt to the connecting rod (10). A storage rack (18) is fixed on the upper side of the processing platform (11) at the other side of the clearance groove (12), and the bottom of the storage rack (18) has a discharge gap (181) set toward the clearance groove (12). A loading cylinder (182) that can push the connecting rod (10) in the storage rack (18) to the top of the clearance groove (12) is also provided on the processing platform (11).

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