Punch driving device of cold header
By designing a punch drive device containing cam and transmission components, the product failure caused by wear and deviation of the punch of the cold header is solved, and reliable adjustment of the punch position and stroke is achieved, and product quality and production efficiency are improved.
Patent Information
- Application Number
- CN202520616861.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2035-04-03
AI Technical Summary
During the punch driving process of existing cold heading machines, the wear and deviation of the punch leads to the product not meeting the standards, and the stroke is difficult to adjust in place when driving the punch, affecting the quality of material forming.
A punch drive device including a frame, a crankshaft, a main link, a large link, a small link, a rotating shaft, a cam and a front push rod are designed. The punch stroke adjustment is achieved through the rotatable adjustment of the cam and the design of the transmission assembly; at the same time, the punch position adjustment mechanism makes the punch position adjustable through the design of the adjustment plate and the die seat.
Reliable adjustment of punch position and stroke is achieved, product quality and production efficiency are improved, and material forming accuracy is ensured.
Smart Images
Figure CN222890500U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of cold heading machines, in particular to a punch driving device of a cold heading machine. Background Art
[0002] Cold heading machine is a highly efficient, automated professional machine tool, mainly used in forging machinery. Cold heading process is an important means for the standard parts industry to produce various bolts, screws, rivets, nuts and other parts. Cold heading machine can sequentially complete the processes of cutting, heading, accumulation, forming, chamfering, thread rolling, diameter reduction and trimming.
[0003] The completion of these processes requires forming through the hammering of the punch. A driving device is required to drive the hammering of the punch. In addition, during the process of driving the punch, the wear and deviation of the punch will cause the product to fail to meet the standards. Therefore, it is necessary to ensure the accuracy of the hammering mold of the punch. However, after the product is replaced or the punch is worn, the adjustment of the punch is not timely, reliable or convenient. At the same time, when the punch is driven, the stroke of the punch is difficult to adjust into place, resulting in difficulty in meeting the specified requirements of the product for material molding. Utility Model Content
[0004] In order to solve the above problems, the utility model provides a punch driving device for a cold heading machine, the purpose of which is to make the punch position reliably adjustable and the punch stroke also adjustable, thereby improving product quality and production efficiency.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a punch driving device of a cold heading machine, comprising a frame, a crankshaft, a main connecting rod, a large connecting rod, a small connecting rod, a rotating shaft, a cam and a front push rod are installed on the frame, the cam is connected to the front push rod through a transmission assembly, the crankshaft drives the main connecting rod to swing back and forth, one end of the main connecting rod and the large connecting rod and one end of the small connecting rod are respectively rotatably installed on a central axis, the main connecting rod drives the large connecting rod to swing, the large connecting rod drives the small connecting rod to swing, the other end of the small connecting rod is connected to the rotating shaft, the small connecting rod drives the rotating shaft to rotate back and forth at a certain angle, a punch is arranged at the end of the front push rod, and a front stroke adjustment mechanism is arranged on the frame corresponding to the front push rod. The front stroke adjustment mechanism includes a cam rotatably adjusted and installed on a rotating shaft, and more than two protrusions are arranged on the peripheral wall of the cam, and the protrusion height of each protrusion is different. The protrusion of the cam is connected to the front push rod through a transmission assembly. The frame is provided with a channel for the front push rod to pass through corresponding to the front push rod, and the length of the channel is adjustable. The frame is provided with a punch position adjustment mechanism corresponding to the punch, and the punch position adjustment mechanism includes a die seat and a front side plate. The die seat is provided with a guide hole for the punch to pass through. The front side plate is fixed on the frame, and the front end surface of the front side plate is provided with an adjustment plate that can be adjusted up and down along it, and the die seat can be adjusted left and right and mounted on the adjustment plate.
[0006] The upper end of the front side plate is connected to a hanging plate, and the hanging plate is provided with a hanging groove corresponding to the adjusting plate one by one. The upper end of the adjusting plate is provided with a Z-axis adjusting screw, and the Z-axis adjusting screw is adjustably hung on the hanging groove through a washer and a nut. The die seat is connected to the adjusting plate, and the adjusting plate and the front side plate are respectively provided with guide holes for the punch to pass through. The upper and lower ends of the die seat are respectively provided with through holes, and sleeves are provided in the through holes. A fixing bolt passes through the sleeve and is connected to the adjusting plate. A gap is left between the sleeve and the through hole of the die seat, and the sleeve is fixedly sleeved on the fixing bolt. Horizontally placed X-axis adjusting screws are respectively screwed on both sides of the die seat, and the ends of the two X-axis adjusting screws are respectively inserted into the through holes and abut against the sleeves, so that the die seat can be adjusted up, down, left and right.
[0007] It also includes a fixed inclined plate and an adjusting inclined plate, which are respectively provided with channels for the front push rod to pass through, and the two channels form the channel, the fixed inclined plate is provided with a first inclined surface, and the adjusting inclined plate is provided with a second inclined surface that slides in contact with the first inclined surface, and a threaded Y-axis adjusting bolt is provided at the upper end of the fixed inclined plate, and the end face of the Y-axis adjusting bolt is rotatably connected to the adjusting inclined plate.
[0008] The rotating shaft is also sleeved with an adjusting wheel, which is fixed on the rotating shaft through a tightening bolt. The cam is arranged between the adjusting wheels, and the adjusting wheel and the cam are engaged with each other through radial cogs that are evenly distributed around the circumference.
[0009] The transmission assembly includes a rotating shaft, a first swing arm, a second swing arm and a return spring. The first swing arm and the second swing arm are respectively connected to the rotating shaft. A roller is provided at the end of the first swing arm, and the roller is close to the cam. The end of the second swing arm can collide with the front push rod. The return spring is installed in a spring groove on the frame. A push plate is installed at the end of the return spring. The push plate contacts the bottom surface of the first swing arm under the action of the return spring.
[0010] The beneficial effects of the utility model are as follows: in the front stroke adjustment mechanism, since the cam is rotatably adjusted and installed on the rotating shaft, and the protrusion heights of each protrusion on the peripheral wall of the cam are different, the different protrusions drive the front push rod to push forward with different strokes through the transmission assembly during the reciprocating swing, thereby achieving a technical effect of a large adjustment range; in the punch position adjustment mechanism, since the adjustment plate is adjusted up and down, the die seat can be adjusted left and right and installed on the adjustment plate, so that the punch position can be adjusted reliably and the punch stroke can also be adjusted, thereby improving product quality and production efficiency.
[0011] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1A three-dimensional diagram of a specific implementation of the utility model;
[0013] Figure 2 It is a partial cross-sectional view of a specific implementation method of the utility model;
[0014] Figure 3 for Figure 1 A magnified view of middle;
[0015] Figure 4 It is a three-dimensional diagram of a cam in a specific implementation mode of the utility model;
[0016] Figure 5 It is a stereoscopic view of the adjusting wheel in a specific implementation manner of the utility model.
[0017] In the figure, 1, crankshaft; 2, main connecting rod; 3, large connecting rod; 4, small connecting rod; 5, rotating shaft; 6, cam; 7, front push rod; 8, front stroke adjustment mechanism; 9, punch position adjustment mechanism; 81, transmission assembly; 10, fixed inclined plate; 20, adjusting inclined plate; 30, channel; 40, Y-direction adjusting bolt; 50, adjusting wheel; 60, cog; 91, die seat; 92, front side plate; 93, adjusting plate; 94, hanging plate; 95, Z-direction adjusting screw; 96, fixing bolt; 97, sleeve; 98, X-direction adjusting screw; 101, first inclined surface; 201, second inclined surface; 81, transmission assembly; 811, rotating shaft; 812, first swing arm; 813, second swing arm; 814, reset spring. DETAILED DESCRIPTION
[0018] The present invention is specifically described below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the protection scope of the present invention.
[0019] like Figure 1 — Figure 5As shown, a punch driving device of a cold heading machine includes a frame, on which a crankshaft 1, a main connecting rod 2, a large connecting rod 3, a small connecting rod 4, a rotating shaft 5, a cam 6 and a front push rod 7 are installed. The cam 6 is connected to the front push rod 7 through a transmission assembly 81. The crankshaft 1 drives the main connecting rod 2 to swing back and forth. One end of the main connecting rod 2, the large connecting rod 3 and one end of the small connecting rod 4 are respectively rotatably installed on a central axis. The main connecting rod 2 drives the large connecting rod 3 to swing, the large connecting rod 3 drives the small connecting rod 4 to swing, and the small connecting rod 4 The other end is connected to the rotating shaft 5, and the small connecting rod 4 drives the rotating shaft 5 to rotate back and forth at a certain angle. A punch 71 is arranged at the end of the front push rod 7, and the frame is provided with a front stroke adjustment mechanism 8 corresponding to the front push rod 7. The front stroke adjustment mechanism 8 includes a cam 6 which can be rotatably adjusted and installed on the rotating shaft 5. Three protrusions 61 are arranged on the peripheral wall of the cam 6. The protrusion height of each protrusion 61 is different. The protrusion 61 is in the shape of a right-angle trapezoid and gradually increases according to a certain height. In this way, the three protrusions 61 enable the front push rod 7 to have short stroke, medium stroke and long stroke adjustment, so as to adapt to the cold heading needs of different products. The protrusion 61 of the cam 6 is connected to the front push rod 7 through a transmission assembly 81. The frame is provided with a channel 30 for it to pass through corresponding to the front push rod 7. The length of the channel 30 is adjustable. The length of the channel 30 can be adjusted so that the stroke of the punch 71 can be fine-tuned again, so that the punch 71 can accurately control the forming size of the product. The punch position adjustment mechanism 9 includes a die seat 91 and a front side plate 92. The die seat 91 is provided with a guide hole for the punch 71 to pass through. The punch 71 is guided and moved in the guide hole. The front side plate 92 is fixed on the frame. The front end surface of the front side plate 92 is provided with an adjustment plate 93 which is adjusted up and down. The die seat 91 is installed on the adjustment plate 93 so as to be adjustable left and right. In this way, the position of the punch 71 can be adjusted left and right and up and down by adjusting the die seat 91.
[0020] A hanging plate 94 is connected to the upper end of the front side plate 92, and a hanging groove corresponding to the adjustment plate 93 is provided on the hanging plate 94. A Z-direction adjusting screw 95 is provided on the upper end of the adjusting plate 93, and the Z-direction adjusting screw 95 is adjustably hung on the hanging groove through a washer and a nut. Guide holes for the punch 71 to pass through are respectively provided on the adjusting plate 93 and the front side plate 92. Through holes are respectively provided at the upper and lower ends of the die seat 91, and sleeves 97 are provided in the through holes. A fixing bolt 96 passes through the sleeve 97 and is connected to the adjusting plate 93. A gap is left between the sleeve 97 and the through hole of the die seat 91, and the sleeve 97 is fixedly sleeved on the fixing bolt 96. Horizontally placed X-direction adjusting screws 98 are respectively screwed on both sides of the die seat 91, and the ends of the two X-direction adjusting screws 98 are respectively inserted into the through holes and abut against the sleeve 97, so that the die seat 91 can be adjusted up, down, left and right.
[0021] The utility model also includes a fixed inclined plate 10 and an adjustable inclined plate 20, and the fixed inclined plate 10 and the adjustable inclined plate 20 are respectively provided with channels for the front push rod 7 to pass through, and the two channels form a channel 30, and the fixed inclined plate 10 is provided with a first inclined surface 101, and the adjustable inclined plate 20 is provided with a second inclined surface 201 that fits and slides with the first inclined surface 101. The specific structure is that a guide groove and a guide block structure are provided between the first inclined surface and the second inclined surface for relative sliding, and a threaded Y-direction adjusting bolt 40 is provided at the upper end of the fixed inclined plate 10, and the end face of the Y-direction adjusting bolt 40 can be rotatably connected to the adjusting screw. On the section inclined plate 20, after rotating the Y-axis adjusting bolt 40, the adjusting inclined plate 20 can slide along the inclined surface of the fixed inclined plate 10, so that the widths on both sides of the fixed inclined plate 10 and the adjusting inclined plate 20 can be changed, thereby changing the length of the channel 30, so that the ejection stroke distance of the punch 71 can be adjusted, which can make the operation more convenient. For example, when the punch 71 is punching, a deeper hole can be punched according to the hole depth requirement. The channel 30 length adjustment device can shorten the channel 30 at the front push rod 7 position, so that the stroke of the punch 71 is longer to meet the punching depth requirement.
[0022] An adjusting wheel 50 is also sleeved on the rotating shaft 5, and the adjusting wheel 50 is fixed on the rotating shaft 5 by a tension bolt. The cam 6 is arranged between the adjusting wheels 50. The adjusting wheel 50 and the cam 6 are engaged with each other through radial and circumferentially uniformly distributed cogs 60. At the same time, the adjusting wheel 50 is connected to the cam 6 by bolts passing through the adjusting wheel 50, so as to ensure that the cogs 60 are engaged more reliably. At the same time, the position of the cam 6 can also be independently adjusted by the bolt. When the cam 6 is adjusted to rotate, the adjusting wheel 50 is loosened by the tension bolt, so that the adjusting wheel 50 can be manually rotated, so that the cam 6 can be driven to rotate and adjust. After the adjustment is completed, the tension bolt is tightened to fix the adjusting wheel 50.
[0023] The adjusting wheel 50 includes a wider adjusting wheel 50 and a narrower adjusting wheel 50, and the peripheral walls of the two adjusting wheels 50 are provided with circumferentially evenly distributed toggle grooves. This structure allows the adjusting wheel 50 to be operated by tools or directly by hand, making the rotation operation of the adjusting wheel 50 more convenient.
[0024] The transmission assembly 81 includes a rotating shaft 811, a first swing arm 812, a second swing arm 813 and a return spring 814. The first swing arm 812 and the second swing arm 813 are respectively connected to the rotating shaft 811. A roller is provided at the end of the first swing arm 812, and the roller is close to the cam 6. The end of the second swing arm 813 can collide with the front push rod 7. The return spring 814 is installed in a spring groove on the frame. A push plate is installed at the end of the return spring 814. The push plate contacts the bottom surface of the first swing arm 812 under the action of the return spring 814. Such a structure has high transmission efficiency. At the same time, when the cam 6 is reset, the first swing arm 812 can also be reset in time under the action of the return spring 814.
[0025] By adopting the above technical scheme, in the front stroke adjustment mechanism 8, since the cam 6 is rotatably adjusted and installed on the rotating shaft 5, and the protrusion heights of each protrusion 61 on the peripheral wall of the cam 6 are different, the different protrusions 61 drive the front push rod 7 to push forward through the transmission assembly 81 during the reciprocating swing to have different strokes, thereby achieving a technical effect of a large adjustment range. In the punch position adjustment mechanism 9, since the adjustment plate 93 is adjusted up and down, the die seat 91 can be adjusted left and right on the adjustment plate 93, so that the position of the punch 71 can be adjusted reliably and the stroke of the punch 71 can also be adjusted, thereby improving product quality and production efficiency.
[0026] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.
[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A punch driving device for a cold heading machine, comprising a frame, a crankshaft, a main connecting rod, a large connecting rod, a small connecting rod, a rotating shaft, a cam and a front push rod are installed on the frame, the cam is connected to the front push rod through a transmission assembly, the crankshaft drives the main connecting rod to swing back and forth, one end of the main connecting rod and the large connecting rod and one end of the small connecting rod are respectively rotatably installed on a central axis, the main connecting rod drives the large connecting rod to swing, the large connecting rod drives the small connecting rod to swing, the other end of the small connecting rod is connected to the rotating shaft, the small connecting rod drives the rotating shaft to rotate back and forth at a certain angle, and a punch is arranged at the end of the front push rod, characterized in that: The frame is provided with a front stroke adjustment mechanism corresponding to the front push rod, and the front stroke adjustment mechanism includes a cam rotatably and adjustably mounted on the rotating shaft, and more than two protrusions are arranged on the peripheral wall of the cam, and the protrusion height of each protrusion is different. The protrusion of the cam is connected to the front push rod through a transmission assembly, and the frame is provided with a channel for the front push rod to pass through, and the length of the channel is adjustable. The frame is provided with a punch position adjustment mechanism corresponding to the punch, and the punch position adjustment mechanism includes a die seat and a front side plate, and the die seat is provided with a guide hole for the punch to pass through, and the front side plate is fixed on the frame, and the front end surface of the front side plate is provided with an adjustment plate that can be adjusted up and down along it, and the die seat can be adjusted left and right and mounted on the adjustment plate.
2. The punch driving device of the cold heading machine according to claim 1, characterized in that: The upper end of the front side plate is connected to a hanging plate, and the hanging plate is provided with a hanging groove corresponding to the adjusting plate one by one. The upper end of the adjusting plate is provided with a Z-axis adjusting screw, and the Z-axis adjusting screw is adjustably hung on the hanging groove through a washer and a nut. The die seat is connected to the adjusting plate, and the adjusting plate and the front side plate are respectively provided with guide holes for the punch to pass through. The upper and lower ends of the die seat are respectively provided with through holes, and sleeves are provided in the through holes. A fixing bolt passes through the sleeve and is connected to the adjusting plate. A gap is left between the sleeve and the through hole of the die seat, and the sleeve is fixedly sleeved on the fixing bolt. Horizontally placed X-axis adjusting screws are respectively screwed on both sides of the die seat, and the ends of the two X-axis adjusting screws are respectively inserted into the through holes and abut against the sleeves, so that the die seat can be adjusted up, down, left and right.
3. The punch driving device of the cold heading machine according to claim 1, characterized in that: It also includes a fixed inclined plate and an adjusting inclined plate, which are respectively provided with channels for the front push rod to pass through, and the two channels form the channel, the fixed inclined plate is provided with a first inclined surface, and the adjusting inclined plate is provided with a second inclined surface that slides in contact with the first inclined surface, and a threaded Y-axis adjusting bolt is provided at the upper end of the fixed inclined plate, and the end face of the Y-axis adjusting bolt is rotatably connected to the adjusting inclined plate.
4. The punch driving device of the cold heading machine according to claim 1, characterized in that: The rotating shaft is also sleeved with an adjusting wheel, which is fixed on the rotating shaft through a tightening bolt. The cam is arranged between the adjusting wheels, and the adjusting wheel and the cam are engaged with each other through radial cogs that are evenly distributed around the circumference.
5. The punch driving device of the cold heading machine according to claim 1, characterized in that: The transmission assembly includes a rotating shaft, a first swing arm, a second swing arm and a return spring. The first swing arm and the second swing arm are respectively connected to the rotating shaft. A roller is provided at the end of the first swing arm, and the roller is close to the cam. The end of the second swing arm can collide with the front push rod. The return spring is installed in a spring groove on the frame. A push plate is installed at the end of the return spring. The push plate contacts the bottom surface of the first swing arm under the action of the return spring.