Machining method for lengthened engine cylinder head cover

Abstract

The invention provides a machining method for a lengthened engine cylinder head cover, which comprises the following steps of: 1, casting a cylinder head cover blank; 2, the cylinder head cover is placed on a machining base, a blank pre-casting hole and a blank positioning face are arranged on the cylinder head cover, and a positioning assembly is installed on the machining base; step 3, positioning and roughly machining a joint surface; 4, a first pin hole and a cam shaft face which are formed in the cylinder head cover are subjected to finish milling; 5, a blank positioning face is machined; 6, leakage testing and infiltration treatment are conducted on the cylinder head cover, and a cam shaft cover is installed; step 7, positioning and finish machining of the joint surface; 8, a cam shaft hole formed in the cylinder head cover is subjected to finish machining; wherein a clamping assembly is arranged on the machining base, and the cylinder head cover can be further positioned through the clamping assembly; the problem that in the prior art, the size precision is difficult to guarantee due to the fact that the cylinder cover deforms in the machining and auxiliary working procedures can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of cylinder processing, and in particular to a processing method for a lengthened engine cylinder head cover. Background Art

[0002] The low engine cylinder head cover is a cover on the engine cylinder block, which has the functions of preventing external impurities from entering the engine, preventing internal oil leakage, oil mist separation, crankcase pressure regulation, isolation structure transmission noise, and serving as a mounting support for other parts. The accuracy of the cylinder head cover mainly includes the flatness and camshaft hole accuracy assurance, and the accuracy of the cylinder head cover has an important impact on the operating performance and life of the engine.

[0003] At present, it is inconvenient to position the cylinder head during processing, and the actual position of the cylinder head cannot be intuitively determined; in order to solve the problems existing in the prior art, the invention with announcement number CN113523356B discloses a cylinder head processing equipment with positioning function (hereinafter referred to as prior art 1), including a mounting frame, a positioning tube, a lifting plate and an elastic connecting member, the lifting plate is arranged in the mounting frame, a drilling rig is installed on the lifting plate, the positioning tube is connected to the bottom of the lifting plate through an elastic connecting member and is sleeved on the outside of the drilling rig drill bit, and the lifting plate is moved up and down by a driving member; the mounting frame is horizontally provided with a supporting plate, and the supporting plate can movably pass through a through hole, and the supporting plate is moved by the lifting member The lifting device is a double-axis motor installed on the mounting frame, and the output shafts at both ends of the double-axis motor are connected to the first rotating shaft. The second rotating shafts connected to the bevel gear of the first rotating shaft are provided on both sides of the mounting frame, and the two second rotating shafts are provided with threaded sections. The lifting plate is provided with two threaded holes that are threadedly matched with the two threaded sections; the lifting device includes a threaded tube and a rotating rod, the threaded tube is installed on the bottom of the support plate, and the mounting frame is rotatably connected with the rotating rod, the rotating rod is provided with a reciprocating threaded section near one end of the threaded tube, the threaded tube is threadedly connected to the reciprocating threaded section, and the rotating rod is provided with a one-way gear, and one of the second rotating shafts is provided with a gear that meshes with the one-way gear for transmission.

[0004] In the prior art 1, the processing position is positioned by a positioning tube, and the processing position is adjusted by moving the positioning tube and the drilling rig, which facilitates the clamping, fixing and taking and placing of the cylinder head; however, the camshaft hole size accuracy requirements of the engine cylinder head cover are very high, including the guarantee of the aperture, coaxiality, position, roundness, etc.; when processing the cylinder head cover, deformation occurs not only during the processing process, but also in auxiliary processes such as leak testing and installing the camshaft cover. Summary of the invention

[0005] The object of the present invention is to provide a method for processing a lengthened engine cylinder head cover, which, in actual use, can solve the problem in the prior art that the cylinder head will be deformed during processing and auxiliary processes, making it difficult to ensure dimensional accuracy.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A method for processing a lengthened engine cylinder head cover comprises the following steps:

[0008] Step 1: Casting a cylinder head cover blank;

[0009] Step 2: placing the cylinder head cover on a processing seat, the cylinder head cover is provided with a blank precast hole and a blank positioning surface, and a positioning component is installed on the processing seat;

[0010] Step 3: Position the rough machining joint surface;

[0011] Step 4: precision milling of the first pin hole and the camshaft surface provided on the cylinder head cover;

[0012] Step 5: Processing the blank positioning surface;

[0013] Step 6: Leak test and impregnate the cylinder head cover and install the camshaft cover;

[0014] Step 7: Position and finish the joint surface;

[0015] Step 8: Finish machining the camshaft hole set on the cylinder head cover;

[0016] Among them, a clamping assembly is provided on the processing seat, and the cylinder head cover can be further positioned by the clamping assembly; in step 8, the boring device used to process the camshaft hole enters the camshaft hole from the front and rear ends of the camshaft hole to bore.

[0017] Preferably, the positioning assembly in step 1 includes a supporting seat, a positioning seat, a sliding pin and a spring, the positioning seat is fixedly mounted on the processing seat, the sliding pin is slidably mounted in the positioning seat, and the sliding pin is connected to the positioning seat through the spring.

[0018] Preferably, the clamping assembly includes a first support rod, a second support rod and a pressure block, the pressure block is slidably connected to the first support rod, a limiting portion is threadedly connected to the first support rod, and the limiting portion can fix the pressure block after cooperating with the second support rod.

[0019] Preferably, the pressing blocks and the supporting seats are arranged in a one-to-one correspondence.

[0020] Preferably, a second pin hole is provided on the cylinder head cover.

[0021] Preferably, the boring device comprises a mounting table, a first driving device, a boring assembly and a sliding plate slidably mounted on the mounting table, the boring assembly is slidably mounted on the mounting table via the sliding plate, and the first driving device is used to drive the sliding plate to move.

[0022] Preferably, the boring assembly comprises a driving motor, a tool rod, a tool head assembly and an adjustment assembly, wherein the driving motor is used to drive the tool rod to rotate, the tool head assembly is slidably mounted on the tool rod, and the adjustment assembly is mounted on the tool rod and used to adjust the diameter of the tool head assembly.

[0023] Preferably, the cutter head assembly comprises a cutter head seat slidably mounted in the cutter rod and a cutter head body detachably mounted on the cutter head seat.

[0024] Preferably, a limiting mechanism is installed on the slide plate.

[0025] Preferably, a first slide rail and a second driving device are provided on the left and right sides of the processing seat, the mounting table is slidably mounted on the first slide rail, and the second driving device is used to drive the mounting table to move.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] In the present invention, the cylinder head cover after rough machining is first subjected to leak testing and impregnation treatment, and after auxiliary processes such as installing the camshaft cover, the positioning assembly, the blank precast hole and the processed blank positioning surface are used to position the fine machining joint surface; it is possible to avoid the auxiliary processes such as leak testing, impregnation treatment and installing the camshaft cover on the cylinder head cover, which may cause product deformation and excessive flatness of the joint surface, and affect the machining accuracy of the camshaft hole;

[0028] The camshaft hole can be further fixed by the provided clamping device to prevent the cylinder head cover from moving or deforming during the processing, thereby improving the processing accuracy;

[0029] By using a boring device to process from both ends of the camshaft hole to the middle of the camshaft hole, not only the tool cost is saved, but also the accuracy of the camshaft hole can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a schematic diagram of the use status of the positioning component and the clamping component in the present invention.

[0033] Figure 3 It is a schematic structural diagram of the positioning seat and the sliding pin in the present invention.

[0034] Figure 4 It is a schematic diagram of the use status of the boring device in the present invention.

[0035] Figure 5 It is a schematic structural diagram of the boring device in the present invention.

[0036] Figure 6 For the present invention Figure 4 A partial enlarged view of point A in the middle.

[0037] Figure 7 It is a schematic diagram of the connection relationship between the second slide rail and the mounting platform in the present invention.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 1 cylinder head cover, 2 processing seat, 3 blank precast hole, 4 positioning assembly, 5 first pin hole, 6 camshaft surface, 7 camshaft hole, 8 clamping assembly, 9 boring device, 10 second pin hole, 11 limiting mechanism, 12 first slide rail, 13 second drive device, 14 second slide rail, 15 moving seat, 16 fourth drive device, 17 rotating block, 18 limiting ring; 41 support seat, 42 positioning seat, 43 sliding pin, 44 spring, 81 first support rod, 82 second support rod, 83 pressing block, 84 limiting part, 91 mounting table, 92 first drive device, 93 boring assembly, 94 sliding plate, 931 driving motor, 932 tool rod, 933 tool head assembly, 934 adjustment assembly, 9331 tool head seat, 9332 tool head body, 9341 third drive device 9342 drive block 9343 guide block 9345 guide inclined surface, 9346 connecting rod. DETAILED DESCRIPTION

[0040] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0041] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention 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 cannot be understood as a limitation on the embodiments of the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0044] In the embodiments of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] The disclosure below provides many different embodiments or examples to implement different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present invention. In addition, the embodiments of the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0046] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0047] Embodiment 1

[0048] See also Figure 1-Figure 4 This embodiment discloses a method for processing a cylinder head cover, which is used for processing an engine cylinder head cover 1, specifically a method for processing an extended engine cylinder head cover, comprising the following steps:

[0049] Step 1: Casting a cylinder head cover 1 blank;

[0050] Step 2: placing the cylinder head cover 1 on the processing seat 2, the cylinder head cover 1 is provided with a blank precast hole 3 and a blank positioning surface, and the processing seat 2 is installed with a positioning component 4;

[0051] Step 3: Position the rough machining joint surface;

[0052] Step 4: precision milling of the first pin hole 5 and the camshaft surface 6 provided on the cylinder head cover 1;

[0053] Step 5: Processing the blank positioning surface;

[0054] Step 6: Perform leak testing and impregnation treatment on the cylinder head cover 1 and install the camshaft cover;

[0055] Step 7: Position and finish the joint surface;

[0056] Step 8: Finishing the camshaft hole 7 provided on the cylinder head cover 1;

[0057] Among them, a clamping assembly 8 is provided on the processing seat 2, and the cylinder head cover 1 can be further positioned by the clamping assembly 8; in step 8, the boring device 9 used to process the camshaft hole 7 enters the camshaft hole 7 from the front and rear ends of the camshaft hole 7 to bore.

[0058] In this embodiment, there are two cylinder head covers 1, namely, a left cylinder head cover and a right cylinder head cover; the left cylinder head cover and the right cylinder head cover are used to be symmetrically installed on the extended engine; a plurality of positioning components 4 are arranged on the processing seat 2, and after the blank precast hole 3 arranged on the cylinder head cover 1 cooperates with the positioning components 4 arranged on the processing seat 2, the left cylinder head cover and the right cylinder head cover are placed on the processing seat 2 accordingly; the rough machining joint surface of the cylinder head cover 1 can be positioned by cooperating with the positioning components 4, the blank precast hole 3 and the blank positioning surface, and the first pin hole 5 and the camshaft surface 6 arranged on the cylinder head cover 1 are finely milled with the rough machining joint surface as the reference surface; the first pin hole 5 after fine milling cooperates with the rough machining joint surface to further position the cylinder head cover 1; after the first pin hole 5 cooperates with the rough machining joint surface, the blank positioning surface and the surface of the cylinder head cover 1 other than the rough machining joint surface are processed to complete the rough machining of the cylinder head cover 1;

[0059] The cylinder head cover 1 after rough machining is subjected to leak testing and impregnation treatment, and auxiliary processes such as camshaft cover are installed; since leak testing and impregnation treatment of the cylinder head cover 1 and installation of the camshaft cover will cause product deformation and excessive flatness of the joint surface, and the joint surface flatness will affect the machining accuracy of the camshaft hole 7, the positioning and finishing of the joint surface needs to be carried out after the cylinder head cover 1 is subjected to leak testing and impregnation treatment, and auxiliary processes such as installation of the camshaft cover are completed; the finishing joint surface of the cylinder head cover 1 can be positioned by the cooperation of the positioning component 4, the blank precast hole 3 and the processed blank positioning surface; the camshaft hole 7 is finished after the finishing joint surface is positioned as the reference surface to ensure the flatness of the cylinder head cover 1 and the accuracy of the camshaft hole 7;

[0060] In the process of boring the camshaft hole 7 to ensure the accuracy of the camshaft hole 7, the camshaft hole 7 can be further fixed by the provided clamping device to prevent the cylinder head cover 1 from moving or deforming during the processing, thereby improving the processing accuracy; since the cylinder head cover 1 in this embodiment is an extended cylinder head cover 1 with a length of 700mm±, only the extended boring tool in the prior art is used to process all the camshaft holes 7, the tool cost is high and the tool is too long and has poor stability, and the accuracy of the camshaft hole 7 cannot be guaranteed; the boring device 9 in the present application adopts a method of processing from both ends of the camshaft hole 7 to the middle of the camshaft hole 7, which not only saves the tool cost but also ensures the accuracy of the camshaft hole 7.

[0061] In some embodiments, the positioning assembly 4 in step 1 includes a support seat 41, a positioning seat 42, a sliding pin 43 and a spring 44. The positioning seat 42 is fixedly mounted on the processing seat 2, and the sliding pin 43 is slidably mounted in the positioning seat 42. The sliding pin 43 is connected to the positioning seat 42 through the spring 44. In this embodiment, the outer diameter of the blank precast hole 3 is smaller than the outer diameter of the sliding pin 43, and a conical head is provided at the top of the sliding pin 43; after the blank precast hole 3 provided on the cylinder head cover 1 is aligned with the sliding pin 43, the cylinder head cover 1 is placed on the processing seat 2, and during the placement of the cylinder head cover 1, the blank precast hole 3 first contacts the sliding pin 43; after the conical head of the sliding pin 43 enters the blank precast hole 3 and cooperates with the blank precast hole 3, the spring 44 is compressed under the action of the gravity of the cylinder head cover 1, and the sliding pin 43 moves downward until the cylinder head cover 1 contacts the support seat 41; the sliding pin 43 and the spring 44 cooperate to be able to The cylinder head seal plays a buffering role in the process of being placed on the processing seat 2, so as to prevent the cylinder head cover 1 from colliding with the support seat 41 when it is directly placed on the support seat 41, causing damage to the support seat 41 and the cylinder head cover 1; after the cylinder head cover 1 and the support seat 41 are in contact, the rough-processed joint surface can be positioned to provide a reference surface for the subsequent rough-processing process; in this embodiment, a support block is connected to the bottom end of the sliding pin 43, and when the support block is in contact with the positioning seat 42, the sliding pin 43 can be limited, so that the sliding pin 43 no longer moves downward, and the spring 44 can be protected by providing the support block to prevent the spring 44 from being over-compressed.

[0062] In some embodiments, the clamping assembly 8 includes a first support rod 81, a second support rod 82 and a pressure block 83. The pressure block 83 is slidably connected to the first support rod 81. A limiting portion 84 is threadedly connected to the first support rod 81. The limiting portion 84 can fix the pressure block 83 after cooperating with the second support rod 82. After the positioning of the finely machined joint surface is completed in step 7, the pressure block 83 is slid so that the pressure block 83 moves to contact the cylinder head cover 1, and then the limiting portion 84 can be rotated to press the pressure block 83 on the second support rod 82, fix the pressure block 83, and further limit the cylinder head cover 1, so as to ensure the stability of the cylinder head cover 1 during the processing and prevent it from moving or deforming during the processing. Traditional clamps may use single-sided clamping or center clamping, which cannot ensure the dimensional stability of the product; in the present embodiment, the clamping assembly 8 is stacked and arranged on both sides of the cylinder head cover 1, and the pressure block 83 arranged on the cylinder head cover 1 simultaneously limits the cylinder head cover 1, which can provide a more uniform and stable clamping force and improve the processing accuracy; the pressure block 83 is provided with a slide groove, and the pressure block 83 is slidably installed on the first support rod 81 through the slide groove, and the position of the pressure block 83 can be adjusted by the cooperation of the slide groove and the first support rod 81.

[0063] In some embodiments, a limiting groove is provided at the bottom end of the pressing block 83, and the pressing block 83 is slidably installed on the second support rod 82 through the limiting groove. By providing the limiting groove, the contact area between the pressing block 83 and the second support rod 82 can be increased, so that after the limiting portion 84 drives the pressing block 83 to move downward, it can better press against the second support rod 82, thereby improving the fixing effect of the pressing block 83; and the limiting groove can guide and limit the pressing block 83, so as to facilitate accurate adjustment of the position of the pressing block 83.

[0064] In some embodiments, the pressing block 83 and the support seat 41 are arranged in a one-to-one correspondence. The pressing block 83 is used to fix the cylinder head cover 1 from above the cylinder head cover 1, and the support seat 41 provides a stable support reference. When the cylinder head cover 1 and the support seat 41 are arranged in correspondence, the cylinder head cover 1 can be stably fixed in the limiting area formed between the pressing block 83 and the support seat 41, ensuring that the workpiece does not move or vibrate during the processing or assembly process, while making the pressure evenly distributed, reducing the deformation of the workpiece caused by the clamping force.

[0065] In some embodiments, the cylinder head cover 1 is provided with a second pin hole 10. In step 8, the second pin hole 10 and the camshaft hole 7 are processed in the same process, and the second pin hole 10 and the camshaft hole 7 are both based on the fine-machined joint surface during the processing, so as to ensure the relative position accuracy of the two, better ensure that the size of the camshaft hole 7 is appropriate, and avoid the size deviation caused by inconsistent datum.

[0066] In some embodiments, the boring device 9 includes a mounting table 91, a first driving device 92, a boring assembly 93 and a sliding plate 94 slidably mounted on the mounting table 91, the boring assembly 93 is slidably mounted on the mounting table 91 through the sliding plate 94, and the first driving device 92 is used to drive the sliding plate 94 to move. In this embodiment, the first driving device 92 is a conventional telescopic driving device in the prior art, and its specific structure and function are not described one by one here; the boring device 9 is symmetrically arranged on the left and right sides of the processing table, the boring assembly 93 is fixedly connected to the sliding plate 94, and under the drive of the first driving device 92, the two boring assemblies 93 can move from the two ends of the camshaft hole 7 to the middle of the camshaft hole 7 to process the camshaft hole 7, while saving the tool cost, ensuring the processing accuracy of the camshaft hole 7.

[0067] In some embodiments, the boring assembly 93 includes a driving motor 931, a tool bar 932, a tool head assembly 933 and an adjustment assembly 934. The driving motor 931 is used to drive the tool bar 932 to rotate, the tool head assembly 933 is slidably mounted on the tool bar 932, and the adjustment assembly 934 is mounted on the tool bar 932 and is used to adjust the diameter of the tool head assembly 933. In this embodiment, the driving motor 931 is fixedly connected to the sliding plate 94, the tool bar 932 is provided with a slot, and the tool head seat 9331 is slidably mounted in the slot; the tool head assembly 933 can be driven to move by the adjustment assembly 934, so as to adjust the diameter of the tool head assembly 933 to meet the requirements of different hole diameter processing.

[0068] In some embodiments, the cutter head assembly 933 includes a cutter head seat 9331 slidably mounted in the cutter rod 932 and a cutter head body 9332 detachably mounted on the cutter head seat 9331. The adjustment assembly 934 can drive the cutter head seat 9331 to move, thereby adjusting the working diameter of the cutter head body 9332; the cutter head body 9332 is detachably connected to the cutter head seat 9331 by bolts, so that the operator can install and replace the cutter head body 9332 according to actual needs.

[0069] In some embodiments, the slide plate is provided with a limiting mechanism 11. By providing the limiting mechanism 11, the cutter head assembly 933 can be guided to move along the axis of the camshaft hole 7, thereby reducing the vibration and deflection of the cutter head assembly 933.

[0070] In some embodiments, a first slide rail 12 and a second drive device 13 are provided on the left and right sides of the processing seat 2, the mounting table 91 is slidably mounted on the first slide rail 12, and the second drive device 13 is used to drive the mounting table 91 to move. In this embodiment, the second drive device 13 is a conventional telescopic drive device in the prior art, and its specific structure and function are not described one by one here; the second drive device 13 can drive the mounting table 91 and the boring assembly 93 to move to a position corresponding to the camshaft hole 7 to process the camshaft hole 7.

[0071] Embodiment 2

[0072] See also Figure 4-Figure 6 This embodiment is further optimized on the basis of the first embodiment. In this embodiment, the adjustment assembly 934 includes a third driving device 9341, a driving block 9342 and a guide block 9343 fixedly connected to the tool head seat 9331, the guide block 9343 is provided with a guide slope 9345, the guide slope 9345 is provided with a guide groove, and the driving block 9342 is provided with a slider for cooperating with the guide groove. Through the cooperation of the guide groove and the slider, when the third driving device 9341 drives the driving block 9342 to move in the direction of the cutter head body 9332, it can drive the cutter head seat 9331 and the cutter head body 9332 to move along the groove in the direction away from the cutter head body 9332; when the third driving device 9341 drives the driving block 9342 to move in the direction away from the cutter head body 9332, it can drive the cutter head seat 9331 and the cutter head body 9332 to move along the groove in the direction of the cutter head body 932; thereby adjusting the working diameter of the cutter head body 9332, so that the cutter head body 9332 can adapt to the processing requirements of camshaft holes 7 with different apertures according to actual needs.

[0073] Preferably, there are two cutter head assemblies 933, which are symmetrically slidably mounted on the cutter bar 932, and there are two guide blocks 9343, which are respectively fixedly connected to the cutter head seats 9331 in the two cutter head assemblies 933. There are two limit grooves, which are symmetrically arranged on the cutter bar 932, and the cutter head assembly 933 is slidably connected to the cutter head through the limit grooves; the sliders are symmetrically arranged on the driving block 9342, and the guide inclined surface 9345 of each guide block 9343 is provided with the guide groove for cooperating with the slider. When the driving block 9342 moves under the drive of the third driving device 9341, the cooperation between the guide groove and the slider can drive the two cutter head seats 9331 to move away from or close to each other, so that the cutter head body 9332 can adapt to the processing requirements of camshaft holes 7 with different apertures according to the actual needs.

[0074] Preferably, the third driving device 9341 can be a telescopic device, a hydraulic driving device or a screw transmission device, etc., which is a driving mechanism for driving an object to move linearly. In this embodiment, the third driving device 9341 is a conventional hydraulic telescopic rod in the prior art, the fixed end of the hydraulic telescopic rod is fixedly connected to the inner wall of the knife bar 932, and the telescopic end of the hydraulic telescopic rod is fixedly connected to the driving block 9342 and is used to drive the driving block 9342 to move.

[0075] In some embodiments, the limiting mechanism 11 includes a limiting seat and a bearing. In this embodiment, the limiting seat is fixedly connected to the sliding plate 94, the inner ring of the bearing is fixedly connected to the limiting seat, and the outer ring of the bearing is fixedly connected to the knife bar 932; when the knife bar 932 rotates under the drive of the driving motor 931, the bearing and the guide shaft cooperate to support and limit the knife bar 932, thereby reducing vibration and flutter of the knife bar 932 during rotation.

[0076] Embodiment 3

[0077] See also Figure 2-Figure 7This embodiment is a further optimization of the first embodiment or the second embodiment. There are a plurality of the cutter head assemblies 933, and the plurality of the cutter head assemblies 933 are sequentially arranged along the direction of the cutter rod 932; there are a plurality of drive blocks 9332 in the adjustment assembly 934, and each adjustment drive block 9332 is arranged corresponding to the cutter head assembly 933, and a connecting rod 9346 is connected between the plurality of drive blocks 9332, and the drive blocks 9332 are connected to the third drive 9341 device through the connecting rod 9346. In this embodiment, the third driving device 9341 is a hydraulic telescopic rod, and the connecting rod 9346 is connected to the telescopic end of the hydraulic telescopic rod; the plurality of driving blocks 9342 in the adjustment assembly 934 are connected through the connecting rod 9346, so that the hydraulic telescopic rod can simultaneously drive the driving blocks 9342 to move, and simultaneously drive the tool head seats 9331 and tool head bodies 9332 in all tool head assemblies 933 to move to a predetermined position to process the camshaft hole 7; in this embodiment, the positions of the tool head assembly 933, the adjustment assembly 934 and the camshaft hole 7 are arranged in a one-to-one correspondence, and the sum of the number of tool head assemblies 933 and the adjustment assembly 934 respectively installed on the two tool rods 932 on both sides of the cylinder head cover 1 is the same as the number of camshaft holes 7 to be processed on the cylinder head cover 1.

[0078] Preferably, a moving seat 15 is fixedly connected to the bottom end of the mounting table 91, and the second driving device 13 is used to drive the moving seat 15 to move along the first slide rail 12; a second slide rail 14 is fixedly connected to the moving seat 15, and the mounting table 91 is slidably connected to the second slide rail 14, and the second slide rail 14 is vertically arranged with the first slide rail 12; the fourth driving device 16 is fixedly installed on the moving seat 15 and is used to drive the mounting table 91 to move along the second slide rail 14 until the tool rod 932 enters the cylinder head cover 1, and the first driving device 92 is used to drive a plurality of tool head assemblies 933 moved into the cylinder head cover 1 to move simultaneously to process the camshaft hole 7; by setting the fourth driving device 16 to first drive the mounting table 9 1 movement, when the first driving device 92 drives the tool rod 932 to move and process the camshaft hole 7, the feed of the tool head body 9332 at different stages can be adjusted and controlled in sections, so that the boring process is more stable and controllable, and it is avoided that the feeding speed and position of the boring tool cannot be effectively controlled after the tool rod 932 is driven by the first driving device 92 to move a long distance, thereby affecting the processing accuracy; and it is avoided that when the tool rod 932 is driven by the first driving device 92 to move a long distance, vibration and chatter are easily generated due to the long overhang of the first driving device 92 and the tool rod 932, thereby affecting the processing quality and tool life; in this embodiment, the fourth driving device is a conventional telescopic rod device in the prior art, and its structure and function are not described one by one here.

[0079] In some embodiments, a rotating block 17 is rotatably mounted on one end of the tool rod 932 away from the driving motor 931 through a bearing, and a thread groove is provided on the rotating block 17, and the rotating block 17 is threadedly connected to a limiting ring 18 through the thread groove. In this embodiment, the limiting ring 18 is rotated in a direction away from the tool rod 932 to form a groove between the limiting ring 18 and the rotating block 17; before the tool rod 932 in the boring device 9 on one side of the cylinder head cover 1 is rotated to process the camshaft hole 7, the limiting ring 18 threadedly connected to the connecting part on the tool rod 932 used for processing the camshaft hole 7 is first rotated to move the limiting ring 18 in a direction close to the tool rod 932; at this time, the limiting ring 18 on the rotating block 17 in the boring device 9 on the other side is rotated in the opposite direction to move the limiting ring 18 to the side away from the tool rod 932 to form a groove between the limiting ring 18 and the rotating block 17; in the process of processing the camshaft hole 7, the limiting ring 18 is rotated to the other side of the boring device 9. After the connecting part which is movably connected to the tool rod 932 in the processing state moves into the slot formed between the limiting ring 18 installed on the boring device 9 on the other side and the connecting part, the tool rod 932 in the processing state can be further limited and rotated along with the tool rod 932, thereby avoiding vibration and chatter caused by the long overhang of the tool rod 932 during the processing, thereby affecting the processing quality and tool life; in this example, a locking bolt is threadedly connected to the limiting ring 18, and after the position of the limiting ring 18 is adjusted according to the actual needs, the locking bolt can be rotated to fix the limiting ring 18, thereby avoiding the limiting ring 18 from loosening during the rotation of the connecting part.

[0080] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for processing a lengthened engine cylinder head cover, characterized in that: The following steps are involved: Step 1: Casting a cylinder head cover (1) blank; Step 2: placing the cylinder head cover (1) on a processing seat (2), the cylinder head cover (1) being provided with a blank precast hole (3) and a blank positioning surface, and the processing seat (2) being provided with a positioning assembly (4); Step 3: Position the rough machining joint surface; Step 4: precision milling of the first pin hole (5) and the camshaft surface (6) provided on the cylinder head cover (1); Step 5: Processing the blank positioning surface; Step 6: Perform leak test and impregnation treatment on the cylinder head cover (1) and install the camshaft cover; Step 7: Position the finishing joint surface; Step 8: Finishing the camshaft hole (7) provided on the cylinder head cover (1); Wherein, a clamping assembly (8) is provided on the processing seat (2), and the cylinder head cover (1) can be further positioned by means of the clamping assembly (8); in step 8, a boring device (9) for processing the camshaft hole (7) enters the camshaft hole (7) from the front and rear ends of the camshaft hole (7) to bore the camshaft hole (7).

2. The method for processing a lengthened engine cylinder head cover according to claim 1, characterized in that: The positioning assembly (4) in step 1 includes a support seat (41), a positioning seat (42), a sliding pin (43) and a spring (44), wherein the positioning seat (42) is fixedly mounted on the processing seat (2), the sliding pin (43) is slidably mounted in the positioning seat (42), and the sliding pin (43) is connected to the positioning seat (42) via the spring (44).

3. The method for processing a lengthened engine cylinder head cover according to claim 2, characterized in that: The clamping assembly (8) comprises a first support rod (81), a second support rod (82) and a pressure block (83); the pressure block (83) is slidably connected to the first support rod (81); a limiting portion (84) is threadedly connected to the first support rod (81); and the limiting portion (84) can fix the pressure block (83) after cooperating with the second support rod (82).

4. The method for processing a lengthened engine cylinder head cover according to claim 3, characterized in that: The pressing block (83) and the supporting seat (41) are arranged in a one-to-one correspondence.

5. The method for processing a lengthened engine cylinder head cover according to claim 1, characterized in that: The cylinder head cover (1) is provided with a second pin hole (10).

6. The method for processing a lengthened engine cylinder head cover according to claim 1, characterized in that: The boring device (9) comprises a mounting platform (91), a first driving device (92), a boring assembly (93) and a sliding plate (94) slidably mounted on the mounting platform (91); the boring assembly (93) is slidably mounted on the mounting platform (91) via the sliding plate (94); and the first driving device (92) is used to drive the sliding plate (94) to move.

7. The method for processing a lengthened engine cylinder head cover according to claim 6, characterized in that: The boring assembly (93) comprises a driving motor (931), a tool rod (932), a tool head assembly (933) and an adjustment assembly (934); the driving motor (931) is used to drive the tool rod (932) to rotate; the tool head assembly (933) is slidably mounted on the tool rod (932); and the adjustment assembly (934) is mounted on the tool rod (932) and is used to adjust the diameter of the tool head assembly (933).

8. The method for processing a lengthened engine cylinder head cover according to claim 7, characterized in that: The cutter head assembly (933) comprises a cutter head seat (9331) slidably mounted in the cutter rod (932) and a cutter head body (9332) detachably mounted on the cutter head seat (9331).

9. The method for processing a lengthened engine cylinder head cover according to claim 8, characterized in that: A limiting mechanism (11) is installed on the slide plate.

10. The method for processing a lengthened engine cylinder head cover according to claim 6, characterized in that: A first slide rail (12) and a second drive device (13) are provided on the left and right sides of the processing seat (2); the mounting platform (91) is slidably mounted on the first slide rail (12); and the second drive device (13) is used to drive the mounting platform (91) to move.

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