Diesel engine cylinder head scribing guide

Abstract

The diesel engine cylinder cover scribing guide device belongs to the technical field of mechanical processing auxiliary equipment, and comprises a disc base body, an alignment rod, a left straight notch and a right straight notch.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary equipment for mechanical processing, and specifically relates to a diesel engine cylinder head scribing guide device, which is used to quickly and accurately scribble the center line on the combustion surface of the diesel engine cylinder head. Background Technology

[0002] In the machining process of diesel engine cylinder heads, after the combustion surface is machined, the center line needs to be re-marked as the alignment benchmark for subsequent processes. The traditional method is to use a scribing platform for scribing, but this method has the following drawbacks:

[0003] 1. Long auxiliary time: The cylinder head needs to be transported to the scribing platform and aligned, which takes about 10 minutes, while the actual scribing only takes 5 minutes, thus greatly increasing the auxiliary time for alignment.

[0004] 2. Low efficiency: When producing 260 cylinder heads per month, if each cylinder head takes 10 minutes to align, it will take 2600 minutes to complete, thus wasting a lot of time;

[0005] 3. Safety hazards: The cylinder head may be damaged or fall off during transport, potentially rendering it unusable.

[0006] 4. Quality risks: Quality problems that occur during transportation are not easily detected, which may result in defective cylinder heads being put into storage.

[0007] In the existing technology, there is a lack of a dedicated device that can directly and quickly complete cylinder head scribing on the production line, which has become a bottleneck restricting the improvement of production efficiency. Therefore, an improvement is proposed. Utility Model Content

[0008] The technical problem solved by this utility model is to provide a diesel engine cylinder head scribing guide device. The purpose of this utility model is to solve the problems of low efficiency and high safety hazards of traditional scribing methods.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] Diesel engine cylinder head scribing guide device, including:

[0011] The disc base has an outer circular stop on its outer edge, which is used to fit with the inner circular stop on the cylinder head with a small clearance.

[0012] The line rod is fixedly installed radially on one side of the disc base;

[0013] The left straight notch is located in the alignment rod and coincides with one of the diameters of the disk base;

[0014] The right straight notch is located on the other side of the disk base, on the same diameter as the left straight notch.

[0015] As a further limitation of the above scheme, the fitting clearance between the outer circular stop of the disc base and the inner circular stop on the cylinder head is H7.

[0016] Further defining the above scheme, the width of the left and right straight notches is 2-5mm and the depth is 3-8mm, and one side of the left and right straight notches on the same side coincides with one diameter of the disk base.

[0017] Further specifying the above scheme, the thickness of the disc substrate is 10-20mm, and the material of the disc substrate is stainless steel or tool steel.

[0018] Further limitations on the above scheme include a ruler P and a ruler N, which are detachably installed in the left or right straight notch for auxiliary marking.

[0019] Further defining the above solution, the disc substrate is provided with a weight-reducing circular groove; the center of the disc substrate is provided with a process hole; and the disc substrate is provided with a positioning hole.

[0020] Advantages of this utility model compared to the prior art:

[0021] 1. This solution significantly improves efficiency: With the scribing guide device, the cylinder head no longer needs to be scribed on the scribing platform when supplementing the center line on the combustion surface. The scribing process can be completed anywhere on the production line in any workshop. The scribing time is reduced from the original 15 minutes (10 minutes for alignment + 5 minutes for scribing) to 3-5 minutes, improving the scribing efficiency of the cylinder head and greatly saving scribing auxiliary time.

[0022] 2. This solution reduces safety hazards: It allows for marking lines anywhere, avoiding frequent cylinder head relocation and reducing the risk of impacts;

[0023] 3. This solution improves scribing accuracy: It directly utilizes the original benchmark of the cylinder head for positioning, with an error of less than 0.1mm, ensuring scribing accuracy;

[0024] 4. This solution is easy to use: it can be used anywhere on the production line without the need for a dedicated marking platform, and it is very convenient to use and operate;

[0025] 5. This solution is low-cost: it has a simple structure, low manufacturing cost, and is easy to promote;

[0026] 6. This solution ensures controllable quality: it allows for the immediate detection and correction of marking deviations, guaranteeing product quality. Attached Figure Description

[0027] Figure 1 This is a top view of the cylinder head scribing guide device of this utility model;

[0028] Figure 2 This is a cross-sectional view of the cylinder head scribing guide device of this utility model;

[0029] Figure 3 This is a schematic diagram of the knife-edge ruler for the cylinder head scribing guide device of this utility model;

[0030] Figure 4 This is a schematic diagram of a diesel engine cylinder head. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Please see Figure 1-4 The embodiments of this utility model are described in detail below.

[0035] This embodiment uses Figure 4 The cylinder head shown is used as an example for explanation.

[0036] The cylinder head is relatively regular in shape. Because the center line of the combustion surface was machined away in the previous process, leaving only a line on the side, the error between the center line and the previously marked line needs to be checked each time. The upper surface has already been machined to the dimensions shown in the drawing, meaning there are reference points on both the top and bottom of the cylinder head. If additional markings are added on the marking platform, the time required for transporting the cylinder head to the platform, lifting, alignment, and marking assistance is too long. Furthermore, uncontrollable factors such as bumps and drops are prone to occur during transport, easily affecting the appearance quality of the cylinder head, and even causing it to be scrapped due to damage. Sometimes, these quality problems are not easily detected, leading to defective cylinder heads being put into storage, wasting manpower and resources, and becoming an obstacle to production progress.

[0037] To solve the above problems, a diesel engine cylinder head scribing guide device is designed, see [reference]. Figure 1-2 As shown, it includes: a disc base 1, the outer edge of which is provided with an outer circular stop 2 for a small clearance fit with the inner circular stop 10 on the cylinder head 9; a line guide rod 3, which is fixedly disposed on one side of the disc base 1 in the radial direction; a left straight notch 4, which is disposed in the line guide rod 3 and coincides with one diameter of the disc base 1; and a right straight notch 5, which is disposed on the other side of the disc base 1 and is located on the same diameter as the left straight notch 4.

[0038] Preferably, the fitting clearance between the outer circular stop 2 of the disc base 1 and the inner circular stop 10 on the cylinder head 9 is H7.

[0039] In one specific embodiment, the width of the left straight notch 4 and the right straight notch 5 is 2-5mm and the depth is 3-8mm, and one side of the left straight notch 4 and the right straight notch 5 on the same side coincides with one diameter of the disk base 1.

[0040] In one specific embodiment, the thickness of the disc substrate 1 is 10-20mm, and the material of the disc substrate 1 is stainless steel or tool steel.

[0041] In one specific implementation, see Figure 3 As shown, it also includes a ruler P11 and a ruler N12, which are detachably installed in the left straight notch 4 or the right straight notch 5 for auxiliary marking.

[0042] In one specific embodiment, the disc base 1 is provided with a weight-reducing circular groove 6; a process hole 7 is provided at the center of the disc base 1; and a positioning hole 8 is provided on the disc base 1 for dot positioning. Mounting holes for installing lifting bolts are provided on the left and right sides of the disc base 1. A alignment post is vertically provided at the end of the alignment rod 3 for aligning the lines on the upper side of the part body and limiting the degree of freedom.

[0043] The structure of the above embodiment utilizes the existing reference surfaces of the cylinder head combustion surface and upper surface as positioning references for the scribing guide device. The combustion surface stop is used as the positioning hole for the device, and positioning can be achieved using the previously scribing. The guide device has straight notches for supplementing the scribing, allowing scribing to be completed without other auxiliary tools and without affecting the normal use of the cylinder head combustion surface. A alignment rod is provided on the outside of the guide device to facilitate visual alignment between the markings on the cylinder head and the device. The height of the guide device is consistent with the height of the side line of the combustion surface, ensuring convenient guidance and observation, and allowing for timely correction if problems are found.

[0044] In this embodiment: During use, align the outer circular stop 2 of the disc base 1 with the inner circular stop 10 of the cylinder head 9, observe the alignment rod 3, and align the left straight notch 4 and right straight notch 5 with the reference line on the side of the cylinder head. Draw the center line through the left straight notch 4 and right straight notch 5. For higher precision, a ruler can be installed to assist in scribing.

[0045] Working principle:

[0046] 1. Positioning stage: Accurate positioning is achieved by utilizing the existing inner circle stop and side reference line of the cylinder head;

[0047] 2. Alignment stage: Align the alignment rod with the original baseline on the side of the cylinder head by observation;

[0048] 3. Marking stage: Draw the center line along the straight gap, or use a ruler to assist in marking the line;

[0049] 4. Verification stage: If inaccurate alignment is found, the device can be rotated to reposition it.

[0050] This cylinder head scribing guide device offers reliable positioning and is simple and convenient to use. It does not interfere with other parts of the cylinder head during use on the combustion surface. Utilizing the combustion surface stop and side baseline as supplementary scribing references facilitates observation of the side lines. The device allows for direct scribing on the cylinder head combustion surface using the included ruler, ensuring error-free visual observation. If misalignment is detected, simply rotating the device can correct it immediately, ensuring accurate scribing on the first attempt without rework. Scribing can be completed anywhere, without the need for a scribing platform.

[0051] Field verification has shown that the cylinder head scribing guide device eliminates the need for scribing on a scribing platform on the combustion surface, allowing for real-time correction of misalignment, reducing scribing assistance time, and solving the problem of low scribing efficiency. For a monthly production of 260 cylinder heads, this device can save more than 43 hours of scribing assistance time per month, while significantly reducing quality risks and production costs.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A diesel engine cylinder head scribing guide device, characterized in that: include: The disc base (1) has an outer circular stop (2) on its outer edge, which is used to fit with the inner circular stop (10) on the cylinder head (9) with a small clearance; The line rod (3) is fixedly installed radially on one side of the disc base (1); The left straight notch (4) is set in the line rod (3) and coincides with one diameter of the disk base (1); The right straight notch (5) is located on the other side of the disk base (1) and is on the same diameter as the left straight notch (4).

2. The diesel engine cylinder head scribing guide device according to claim 1, characterized in that: The fitting clearance between the outer circular stop (2) of the disc base (1) and the inner circular stop (10) on the cylinder head (9) is H7.

3. The diesel engine cylinder head scribing guide device according to claim 1, characterized in that: The width of the left straight notch (4) and the right straight notch (5) is 2-5mm and the depth is 3-8mm. One side of the left straight notch (4) and the right straight notch (5) on the same side coincides with one diameter of the disk base (1).

4. The diesel engine cylinder head scribing guide device according to claim 1, characterized in that: The thickness of the disc substrate (1) is 10-20mm, and the material of the disc substrate (1) is stainless steel or tool steel.

5. The diesel engine cylinder head scribing guide device according to claim 1, characterized in that: It also includes a knife-edge ruler P (11) and a knife-edge ruler N (12), which are detachably installed in the left straight notch (4) or the right straight notch (5) for auxiliary marking.

6. The diesel engine cylinder head scribing guide device according to claim 1, characterized in that: The disc substrate (1) is provided with a weight-reducing circular groove (6); the disc substrate (1) is provided with a process hole (7) at its center; and the disc substrate (1) is provided with a positioning hole (8).

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