Vertical flexible press-fitting equipment for engine cylinder cover

Abstract

The utility model discloses vertical flexible press-fitting equipment for an engine cylinder cover, which comprises a frame, a workpiece positioning mechanism arranged on the frame, a press-fitting mechanism arranged below the workpiece positioning mechanism, a feeding mechanism arranged on the frame, a driving mechanism arranged below the press-fitting mechanism, and a pressing mechanism arranged below the driving mechanism. The workpiece positioning mechanism is used for fixing the position of a workpiece to be press-fitted, the feeding mechanism slides a bowl-shaped plug to the position above the press-fitting mechanism through the gravity of the bowl-shaped plug, the press-fitting mechanism presses the bowl-shaped plug onto the workpiece, and the feeding mechanism provides power for the press-fitting mechanism; by means of the mode, damage to an engine cylinder cover caused by deviation of the bowl-shaped plug in the press fitting process can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical press-fitting, in particular to a vertical flexible press-fitting device for an engine cylinder head. Background Technique

[0002] On the assembly line of automobile engines, about 60% of the assembly work needs to be completed by a press, such as the press-fitting of steel balls, bowl-shaped plugs, positioning pins, and guide seat rings.

[0003] Conventional press-fitting methods generally include hydraulic press-fitting methods, gas-liquid boosting press-fitting methods, and AC servo press-fitting methods. Among them, the AC servo press-fitting method is a press-fitting method that uses an electric servo drive module to control and complete the press-fitting process. It has become a new trend in the development of current equipment. It not only has all the advantages of mechanical devices but also can control and adjust the working conditions, greatly improving the process flexibility.

[0004] Today's mainstream domestic and foreign automobile enterprises have adopted the press-fitting method of servo presses in the press-fitting process of engine parts. As an important part of the engine press-fitting process, the press-fitting of bowl-shaped plugs naturally also adopts this relatively advanced press-fitting method.

[0005] At present, some engine manufacturers' plug press-fitting mechanisms adopt the following method: the mechanism is driven by a servo press, and a press head installed at the front end of the servo press is used for horizontal press-fitting. However, this engine bowl-shaped plug press-fitting mechanism has the following defects: since the press head horizontally grabs and press-fits the bowl-shaped plug, the bowl-shaped plug will tend to one side due to its own gravity characteristics, resulting in a side deviation phenomenon during press-fitting and being unable to be centered, thus damaging the press-fitting hole and the bowl-shaped plug itself, and even making it impossible to effectively achieve the sealing performance.

[0006] If there are situations of press-fitting force out-of-tolerance and side deviation of the bowl-shaped plug during the press-fitting process, it is necessary to disassemble the workpiece (engine cylinder head) and re-press-fit it. This not only affects the press-fitting quality and production efficiency but also may damage the sealing holes of the engine cylinder head, and in more serious cases, it will even cause the parts to be scrapped. Content of the Utility Model

[0007] The main technical problem to be solved by the utility model is to provide a vertical flexible press-fitting device for an engine cylinder head, which can avoid damage to the engine cylinder head caused by side deviation of the bowl-shaped plug during press-fitting.

[0008] To solve the above technical problems, a technical solution adopted by the present utility model is: to provide a vertical flexible pressing device for an engine cylinder head, including: a frame, on which a workpiece positioning mechanism is arranged, a pressing mechanism is arranged below the workpiece positioning mechanism, a feeding mechanism is arranged on the frame, the feeding mechanism is arranged on one side of the pressing mechanism, and a driving mechanism is arranged below the pressing mechanism. The workpiece positioning mechanism is used to fix the position of the workpiece to be pressed. The feeding mechanism uses the gravity of the bowl-shaped plug itself to slide the bowl-shaped plug above the pressing mechanism. The pressing mechanism presses the bowl-shaped plug onto the workpiece, and the feeding mechanism provides power for the pressing mechanism.

[0009] Preferably, a main linear guide rail is arranged on the frame. The driving mechanism includes a sliding mounting plate, a pressing driving device, and a first connecting head. The sliding mounting plate is slidably matched with the main linear guide rail. The pressing driving device is arranged on the sliding mounting plate, and the first connecting head is arranged on the pressing driving device for connecting the pressing mechanism.

[0010] Preferably, the pressing mechanism includes a vertical linear guide rail, a pressing column, and a profiling pressing head. The pressing column is arranged on the vertical linear guide rail, and the profiling pressing head is arranged on the pressing column for jacking up the bowl-shaped plug and enabling the bowl-shaped plug to freely float and be centered on the profiling pressing head. A second connecting head is arranged below the pressing column, and the second connecting head is connected and matched with the first connecting head.

[0011] Preferably, the feeding mechanism includes a loading bottom block and a gravity feeding channel. The gravity feeding channel is communicated with the loading bottom block. The spherical plug slides along the gravity feeding channel to the loading bottom block by its own gravity and is in the position where the profiling pressing head can pick up the material.

[0012] Preferably, the driving mechanism further includes a servo module and a ball screw module. The servo module is arranged on the main linear guide rail and is connected with the ball screw module. The servo module is used to drive the ball screw module to rotate, and the ball screw module is in threaded cooperation with the sliding mounting plate.

[0013] Preferably, the pressing driving device is an electric cylinder module.

[0014] Preferably, the first connecting head is provided with a T-shaped groove, and the second connecting head extends a T-shaped convex block that is matched with the T-shaped groove.

[0015] Preferably, the gravity feeding channel is arranged in a large arc shape.

[0016] Preferably, a first loading slider and a second loading slider are slidably matched on the loading bottom block. A loading hole for carrying the bowl-shaped plug is formed between the first loading slider and the second loading slider. The loading hole is communicated with the gravity feeding channel. The first loading slider and the second loading slider are connected with a loading driving part for driving them to move, so that the bowl-shaped plug on the loading hole is in the position where the material can be picked up or received.

[0017] Preferably, a limiting plate is elastically arranged on the upper side of the bearing hole, and the limiting plate elastically limits the maximum height range when the profiling punch presses up the bowl-shaped plug.

[0018] The beneficial effects of the present utility model are as follows: Through the gravity chute of the feeding mechanism, the bowl-shaped plug can reach above the pressing device by its own gravity. Through the profiling punch with profiling design, the bowl-shaped plug can freely float on the profiling punch, and during pressing, the bowl-shaped plug can effectively freely float and center through the arc of the bowl bottom and the chamfer of the pressing hole, effectively ensuring the accuracy of the pressing position, avoiding deviation, and adjusting and controlling the working state of the pressing driving device of the electric cylinder module to avoid over-tolerance of the pressing force, greatly improving the process flexibility. Description of the Drawings

[0019] Figure 1 is the overall structural schematic diagram of the present utility model;

[0020] Figure 2 is Figure 1 the enlarged schematic diagram of part A in

[0021] Figure 3 is Figure 2 the enlarged schematic diagram of part B in

[0022] Figure 4 is the structural schematic diagram of another perspective of the present utility model;

[0023] Figure 5 is the front view of the present utility model;

[0024] Figure 6 is the partial cross-sectional view of the front view of the present utility model;

[0025] Figure 7 is Figure 5 the enlarged schematic diagram of part C in

[0026] Figure 8 is Figure 5 the enlarged schematic diagram of part D in

[0027] The marks of each component in the drawings are as follows:

[0028] 1. Frame; 11. Main linear guide rail;

[0029] 21. Sliding mounting plate; 22. Pressing driving device; 23. First connecting head; 231. T-shaped groove;

[0030] 24. Servo module; 25. Ball screw module;

[0031] 3. Pressing mechanism; 31. Vertical linear guide rail; 32. Pressing column; 33. Profiling punch; 34. Second connecting head;

[0032] 4. Feeding mechanism; 41. Loading bottom block; 42. Gravity chute; 43. First loading slider; 44. Second loading slider; 45. Loading hole; 46. Loading driving part; 47. Limiting plate; 48. Limiting bolt;

[0033] 49. Spring;

[0034] 5. Workpiece positioning mechanism; 51. Positioning mounting plate; 52. First jaw; 53. Second jaw; 54. Positioning post;

[0035] 6. Bowl-shaped plug. Detailed implementation manners

[0036] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0037] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0039] In the present utility model, unless otherwise clearly defined or limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0041] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0042] For the physical quantities in the formula, if not separately marked, they should be understood as the basic quantities of the basic units of the International System of Units, or the derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0043] Embodiment:

[0044] Reference Figures 1 - 8 , a vertical flexible press-fitting device for an engine cylinder head, comprising: a frame 1, a workpiece positioning mechanism 5 is installed on the frame 1, a press-fitting mechanism 3 is arranged below the workpiece positioning mechanism 5, a feeding mechanism 4 is installed on the frame 1, the feeding mechanism 4 is arranged on one side of the press-fitting mechanism 3, a driving mechanism is arranged below the press-fitting mechanism 3, the workpiece positioning mechanism 5 is used to fix the position of the workpiece to be press-fitted, the feeding mechanism 4 slides the bowl-shaped plug 6 to the upper part of the press-fitting mechanism 3 by the gravity of the bowl-shaped plug 6 itself, the press-fitting mechanism 3 press-fits the bowl-shaped plug 6 onto the workpiece, and the feeding mechanism 4 provides power for the press-fitting mechanism 3 to press-fits the bowl-shaped plug 6 onto the workpiece.

[0045] Figure 1 , Figure 2 and Figure 6 , a main linear guide rail 11 is installed on the frame 1. The driving mechanism includes a sliding mounting plate 21, a pressing driving device 22, and a first connector 23. The sliding mounting plate 21 is slidably matched with the main linear guide rail 11. The pressing driving device 22 is installed on the sliding mounting plate 21, and the first connector 23 is installed on the pressing driving device 22 for connecting the pressing mechanism 3. The pressing driving device 22 can be an electric cylinder module, so as to be able to control and adjust the working condition, avoid the over-tolerance of the pressing force, and greatly improve the process flexibility.

[0046] Figure 2 , Figures 5 - 8 , the pressing mechanism 3 includes a vertical linear guide rail 31, a pressing column 32, and a profiling pressing head 33. The pressing column 32 is installed on the vertical linear guide rail 31, so that it can slide up and down on the vertical linear guide rail 31. When the pressing driving device 22 rises, it can lift the pressing column 32. When the pressing driving no longer lifts the pressing column 32, the pressing column 32 returns to its original position by its own gravity. An in-situ monitoring sensor is installed on the vertical linear guide rail 31 to monitor whether the pressing column 32 is in the in-situ position. The profiling pressing head 33 is installed on the pressing column 32 through bolts for lifting the bowl-shaped plug 6. Since the shape of the profiling pressing head 33 is in profiling fit with the shape of the bowl-shaped plug 6, the bowl-shaped plug 6 can freely float and be centered on the profiling pressing head 33. A second connector 34 is installed below the pressing column 32, and the second connector 34 is connected and matched with the first connector 23.

[0047] Reference Figure 2 , the first connector 23 is provided with a T-shaped groove 231, and the second connector 34 extends a T-shaped protrusion that is matched with the T-shaped groove 231, so as to realize the connection between the pressing driving device 22 and the pressing column 32 through the engagement of the first connector 23 and the second connector 34. Since the position of the pressing driving device 22 can be adjusted and controlled in the horizontal position, multiple pressing mechanisms 3 can be arranged at different horizontal positions, so as to correspond to the pressing points of multiple workpieces or the pressing points of different workpieces. One set of driving mechanism is arranged, so as to lift the pressing columns 32 at different positions by adjusting the position of the pressing driving device 22. At this time, the T-shaped protrusions of the second connectors 34 on different pressing mechanisms 3 are coaxially arranged, so that one first connector 23 can cooperate with multiple second connectors 34.

[0048] Reference Figure 2 and Figure 4, To precisely control the position of the pressing drive device 22 to cooperate with multiple pressing mechanisms 3, the drive mechanism further includes a servo module 24 and a ball screw module 25. The servo module 24 is installed on the main linear guide 11 and connected to the ball screw module 25. The servo module 24 is used to drive the ball screw module 25 to rotate. The ball screw module 25 is in threaded cooperation with the sliding mounting plate 21 to control the position of the sliding mounting plate 21, and further control and adjust the position of the pressing drive device 22. By adopting a split design of the pressing drive device 22 and the pressing column 32, the pressing drive device 22 can freely and unrestrictedly switch within a large range accurately on the main linear guide 11, which not only meets the design of reducing the pressing unit but also improves the high flexibility of pressing.

[0049] Reference Figures 2 - 4 and Figure 7 , The feeding mechanism 4 includes a loading bottom block 41 and a gravity chute 42. The gravity chute 42 is communicated with the loading bottom block 41 and is arranged in a large arc shape, so that the bowl-shaped plug 6 slides along the gravity chute 42 by its own gravity into the loading bottom block 41 and is in a position waiting for the profiling punch 33 to pick up the material. A first loading slider 43 and a second loading slider 44 are slidably fitted in the loading bottom block 41. A loading hole 45 for carrying the bowl-shaped plug 6 is formed between the first loading slider 43 and the second loading slider 44. The loading hole 45 is communicated with the gravity chute 42, so that the bowl-shaped plug 6 in the gravity chute 42 can enter the loading hole 45. One end of the gravity chute 42 is installed on the upper side part of the frame 1, and the other end is communicated with the loading hole 45. The inner side of the loading hole 45 is a stepped through hole, so that while being able to support the bowl-shaped plug 6, the profiling punch 33 can penetrate into the loading hole 45 and push into the bowl-shaped plug 6, and further achieve the effect of taking away the bowl-shaped plug 6. The first loading slider 43 and the second loading slider 44 are connected with a loading driving part 46 for driving them to move. The loading driving part 46 can be a cylinder to control the positions of the first loading slider 43 and the second loading slider 44, and further make the bowl-shaped plug 6 on the loading hole 45 be in the waiting-for-picking-up position or the receiving position. A group of full-material switches are installed above the gravity chute 42 to ensure the controllability of the stored material in the gravity chute 42, so as to ensure that there is enough gravity to satisfy the free sliding of the bowl-shaped plug 6 to the specified position without additional driving design.

[0050] Reference Figure 2 , Figure 3 and Figure 7, in order to prevent the profiling punch 33 from pushing off the bowl-shaped plug 6 when jacking it up, a limiting plate 47 is elastically arranged on the upper side of the bearing hole 45, so that the limiting plate 47 elastically limits the maximum height range when the profiling punch 33 jacks up the bowl-shaped plug 6. Two limiting bolts 48 can be installed in parallel on the first loading slider 43 and the second loading slider 44, and a spring 49 is sleeved on the limiting bolt 48, with one end of the spring 49 pressing against the limiting plate 47 and the other end abutting against the head of the limiting bolt 48, so that the limiting plate 47 is elastically pressed by the spring 49. In this way, when the profiling punch 33 jacks up, it can prevent the bowl-shaped plug 6 from detaching while avoiding problems such as damage and deformation of the bowl-shaped plug 6 due to excessive extrusion. At the same time, under the action of the elastic blocking force of the limiting plate 47, under the action of a small pressure and in cooperation with the profiling design of the profiling punch 33 and the bowl-shaped plug 6, the attitude of the bowl-shaped plug 6 on the profiling punch 33 can be corrected, further reducing the offset phenomenon during the press-fitting with the engine cylinder head caused by the angular attitude problem of the bowl-shaped plug 6.

[0051] Reference Figure 5 and Figure 8 , the workpiece positioning mechanism 5 includes a positioning mounting plate 51, a first jaw 52, a second jaw 53 and a positioning post 54. The first jaw 52, the second jaw 53 and the positioning post 54 are all installed on the positioning mounting plate 51. The positioning post 54 is used to provide positioning for the engine cylinder head, and the first jaw 52 and the second jaw 53 clamp the engine cylinder head on the positioning mounting plate 51. Multiple workpiece positioning mechanisms 5 can be installed using an island design. This independent design is convenient for accommodating the positioning of different types of workpieces.

[0052] Usage process: The workpiece positioning mechanism 5 positions and clamps the engine cylinder head at the top of the equipment. The bowl-shaped plug 6 slides through the gravity feeder tape into the bearing hole 45 between the first loading slider 43 and the second loading slider 44. The loading driving part 46 controls the positions of the first loading slider 43 and the second loading slider 44 to make them reach the position where the material is to be picked up. The servo module 24 and the ball screw module 25 operate to make the second connector 34 of the second connector 34 of the press stud 32 at the position where press fitting is required engage and connect. At this time, the bowl-shaped plug 6 is above the profiling punch 33. Then the press fitting driving device 22 operates to jack up the press stud 32, driving the profiling punch 33 to rise and penetrate into the bearing hole 45, jacking up the bowl-shaped plug 6. The bowl-shaped plug 6 freely floats and centers itself at the top of the profiling punch 33 by its own gravity. At the same time, the loading driving part 46 resets, driving the first loading slider 43 and the second loading slider 44 to reset and reach the material receiving position. After the profiling punch 33 picks up the material, it continues to be driven upward by the press fitting driving device 22 until the bowl-shaped plug 6 is pressed into the plugging hole of the engine cylinder head. At this time, there is free floating between the bowl-shaped plug 6 and the profiling punch 33. During the press fitting process, the bowl-shaped plug 6 can effectively freely float and center through the arc of the bowl bottom and the chamfer of the press fitting hole, effectively ensuring the accuracy of the press fitting position. And the depth and force of the press fitting are monitored by the pressure and displacement monitoring system of the press fitting driving device 22 itself.

[0053] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A vertical flexible press-fitting device for an engine cylinder head, characterized in that, Comprising: A frame (1), on which a workpiece positioning mechanism (5) is provided. Below the workpiece positioning mechanism (5), a press-fitting mechanism (3) is provided. On the frame (1), a feeding mechanism (4) is provided. The feeding mechanism (4) is arranged on one side of the press-fitting mechanism (3). Below the press-fitting mechanism (3), a driving mechanism is provided. The workpiece positioning mechanism (5) is used to fix the position of the workpiece to be press-fitted. The feeding mechanism (4) slides the bowl-shaped plug (6) to the upper part of the press-fitting mechanism (3) by the gravity of the bowl-shaped plug (6) itself. The press-fitting mechanism (3) press-fits the bowl-shaped plug (6) onto the workpiece, and the feeding mechanism (4) provides power for the press-fitting mechanism (3).

2. The vertical flexible press-fitting device for an engine cylinder head according to claim 1, wherein: On the frame (1), a main linear guide rail (11) is provided. The driving mechanism includes a sliding mounting plate (21), a press-fitting driving device (22), and a first connecting head (23). The sliding mounting plate (21) is slidably matched with the main linear guide rail (11). The press-fitting driving device (22) is arranged on the sliding mounting plate (21). The first connecting head (23) is arranged on the press-fitting driving device (22) and is used to connect the press-fitting mechanism (3).

3. The vertical flexible press-fitting device for an engine cylinder head according to claim 2, wherein: The press-fitting mechanism (3) includes a vertical linear guide rail (31), a press column (32), and a profiling punch (33). The press column (32) is arranged on the vertical linear guide rail (31). The profiling punch (33) is arranged on the press column (32) and is used to jack up the bowl-shaped plug (6) and make the bowl-shaped plug (6) freely float and center on the profiling punch (33). Below the press column (32), a second connecting head (34) is provided. The second connecting head (34) is connected and matched with the first connecting head (23).

4. The vertical flexible press-fitting device for an engine cylinder head according to claim 1, characterized in that: The feeding mechanism (4) includes a loading bottom block (41) and a gravity chute (42). The gravity chute (42) is communicated with the loading bottom block (41). The spherical plug slides along the gravity chute (42) by its own gravity into the loading bottom block (41) and is in the position for the profiling punch (33) to pick up the material.

5. The vertical flexible press-fitting device for an engine cylinder head according to claim 2, characterized in that: The driving mechanism further includes a servo module (24) and a ball screw module (25). The servo module (24) is arranged on the main linear guide rail (11) and is connected with the ball screw module (25). The servo module (24) is used to drive the ball screw module (25) to rotate. The ball screw module (25) is in threaded cooperation with the sliding mounting plate (21).

6. The vertical flexible press-fitting device for an engine cylinder head according to claim 2, wherein: The press-fitting driving device (22) is an electric cylinder module.

7. The vertical flexible press-fitting device for an engine cylinder head according to claim 3, characterized in that: The first connecting head (23) is provided with a T-shaped groove (231), and the second connecting head (34) extends with a T-shaped protrusion that is matched with the T-shaped groove (231).

8. The vertical flexible press-fitting device for an engine cylinder head according to claim 4, characterized in that: The gravity chute (42) is arranged in a large arc shape.

9. The vertical flexible press-fitting device for an engine cylinder head according to claim 4, characterized in that: A first loading slider (43) and a second loading slider (44) are slidably fitted on the loading bottom block (41). A loading hole (45) for carrying the bowl-shaped plug (6) is formed between the first loading slider (43) and the second loading slider (44). The loading hole (45) is communicated with the gravity chute (42). The first loading slider (43) and the second loading slider (44) are connected with a loading driving member (46) for driving them to move, so that the bowl-shaped plug (6) on the loading hole (45) is in the position for material taking or material receiving.

10. A vertical flexible press-fitting device for an engine cylinder head according to claim 9, characterized in that: A limiting plate (47) is elastically arranged on the upper side of the loading hole (45). The limiting plate (47) elastically limits the maximum height range when the profiling pressure head (33) jacks up the bowl-shaped plug (6).

Images