Auxiliary mounting device for honing inner hole of valve rod guide sleeve

Abstract

The invention belongs to the technical field of valve rod guide sleeve fixing device manufacturing, and particularly relates to an auxiliary mounting device for valve rod guide sleeve inner hole honing, which comprises a base and a middle block, a first through hole is formed in the center of the base, a second through hole is formed in the middle block, the middle block is fixed on the upper surface of the base through a first bolt, and the first through hole and the second through hole are coaxial; the inner diameter of the first through hole is larger than that of the second through hole, and at least two screw holes are axially formed in the upper surface of the middle block around the second through hole; according to the product characteristic that the four unthreaded holes are formed in the large outer circle of the valve rod guide sleeve, the auxiliary mounting device for honing the inner hole of the valve rod guide sleeve is designed, so that when the auxiliary mounting device is used, the valve rod guide sleeve is locked on the middle block in the mode that second bolts penetrate through at least two unthreaded holes in the valve rod guide sleeve in a penetrating mode; and the valve rod guide sleeve can be honed conveniently through a horizontal turning procedure before honing and a vertical honing machine.

Description

Technical Field

[0001] The present application belongs to the technical field of valve stem guide sleeve fixing device manufacturing, and specifically relates to an auxiliary installation device for honing the inner hole of a valve stem guide sleeve. Background Art

[0002] As a key component of marine diesel engines, the valve stem guide sleeve has the main function of supporting and guiding the movement of the valve stem to ensure the normal opening and closing of the valve. The valve stem guide sleeve has multiple outer circles and its inner hole with high precision requirements, including size, shape and position tolerances, and roughness. The key difficulty lies in processing inner holes with large aspect ratios. The traditional processing method is to use a floating boring tool for fine processing of the inner hole, but there is instability (for example: 1. Vibration is easily generated during the processing, resulting in chatter marks; 2. After the tool is worn, the diameter of the bored inner hole will gradually decrease.), and it is difficult to ensure product quality. However, the inventor found that by leaving a processing allowance of 0.05-0.07mm for the inner hole with a large aspect ratio in the pre-honing horizontal turning process, and then using a vertical honing machine to hone to achieve the fine machining of the inner hole of the valve stem guide sleeve, the instability of the floating boring tool for fine machining of the inner hole can be solved. However, how to fix the valve stem guide sleeve in the pre-honing horizontal turning process is an important issue for realizing honing with a vertical honing machine. Once the problem of how to fix the valve stem guide sleeve is solved, the valve stem guide sleeve can be honed through the pre-honing horizontal turning process and the vertical honing machine. Summary of the invention

[0003] The purpose of this application is to address the shortcomings of the prior art. By taking advantage of the product feature that four smooth holes are provided on the large outer circle of the valve stem guide sleeve, an auxiliary installation device for honing the inner hole of the valve stem guide sleeve is designed, so that when in use, the valve stem guide sleeve can be locked on the intermediate block by passing a second bolt through at least two smooth holes on the valve stem guide sleeve, thereby facilitating the honing of the valve stem guide sleeve through the honing front-end horizontal lathe process and the vertical honing machine.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] An auxiliary installation device for honing the inner hole of a valve stem guide sleeve comprises a base and an intermediate block. The base is provided with a first through hole in the center, the intermediate block is provided with a second through hole, the intermediate block is fixed to the upper surface of the base by a first bolt, the first through hole is coaxial with the second through hole, the inner diameter of the first through hole is larger than the inner diameter of the second through hole, and the upper surface of the intermediate block is provided with at least two screw holes axially around the second through hole.

[0006] Preferably, a plurality of T-shaped blocks are evenly arranged on the lower surface of the base around the first through hole, and one end of the vertical portion of the T-shaped block away from the horizontal portion is fixedly connected to the lower surface of the base.

[0007] Preferably, the base is made of HT200 material.

[0008] Preferably, the middle block is made of Q235 plate.

[0009] Preferably, the base is a cylinder, and the intermediate block is arranged on the end surface of the cylinder.

[0010] Preferably, the middle block is a cylinder.

[0011] Preferably, the middle block includes a plurality of block units, each of the block units is provided with a slot, the length direction of the slot is parallel to the end face of the base and perpendicular to the central axis of the base, each of the block units is provided with the screw hole away from the slot, the screw hole is located between one end of the slot facing away from the central axis of the base and the central axis of the base, and the block unit is fixedly connected to the base by a first bolt passing through the slot.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present application uses the product characteristic that four light holes are provided on the large outer circle of the valve stem guide sleeve to design an auxiliary installation device for honing the inner hole of the valve stem guide sleeve, so that when in use, the valve stem guide sleeve is locked on the intermediate block by penetrating at least two light holes on the valve stem guide sleeve through a second bolt, which facilitates honing of the valve stem guide sleeve through the honing front horizontal lathe process and the vertical honing machine;

[0014] 2. After the T-block is set in this application, it is convenient to install the base in the T-slot on the middle working table of the honing machine through the T-block. Figure 3 As shown, the hexagon socket round head screw is used to lock the base on the middle working table of the honing machine by using an hexagon socket wrench, and then the intermediate block is fixed on the base 1;

[0015] 3. The base in this application is a supporting part, so it is made of HT200 material. This is mainly because HT200 material has good casting performance, good cutting performance, good vibration absorption performance, and good anti-friction and wear performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure in which the valve stem guide sleeve is installed in this application;

[0017] Figure 2 for Figure 1 A top view of

[0018] Figure 3 for Figure 2 Middle AA section;

[0019] Figure 4 for Figure 2 Middle BB section;

[0020] Figure 5 This is a schematic diagram of the middle block of the present application using the second implementation method.

[0021] In the figure: 1, base; 2, middle block; 3, first through hole; 4, second through hole; 5, bolt; 6, T-block; 7, notch; 8, screw hole; 9, valve stem guide sleeve; 10, second bolt. DETAILED DESCRIPTION

[0022] like Figure 1-5 As shown, an auxiliary installation device for honing the inner hole of a valve stem guide sleeve comprises a base 1 and an intermediate block 2. A first through hole 3 is provided in the center of the base 1, and a second through hole 4 is provided on the intermediate block 2. The intermediate block 2 is fixed to the upper surface of the base 1 by a first bolt 5. The first through hole 3 is coaxial with the second through hole 4, and the inner diameter of the first through hole 3 is larger than the inner diameter of the second through hole 4. At least two screw holes 8 are axially provided around the second through hole 4 on the upper surface of the intermediate block 2.

[0023] When in use, the valve stem guide sleeve 9 is placed vertically on the middle block 2, and the valve stem guide sleeve 9 is made coaxial with the second through hole 4. The second bolt 10 penetrates the light hole on the valve stem guide sleeve 9 and is inserted into the screw hole 8 on the middle block, so that the valve stem guide sleeve 9 is locked on the middle block 2. Then the base 1 is fixed on the vertical honing machine, and the honing head inlaid with oilstone is driven to rotate by the main shaft vertically placed on the honing machine. At the same time, it is driven by the hydraulic device to make a vertical reciprocating feed motion to hone the inner surface of the valve stem guide sleeve 9. The inner surface size of the valve stem guide sleeve 9 is inspected with an inner diameter gauge, and it is removed after meeting the size requirements of the drawing. The entire design uses the characteristic of the valve stem guide sleeve 9 having a light hole to fix the valve stem guide sleeve 9, so that the accuracy of the inner surface of the valve stem guide sleeve 9 can be guaranteed. Since the honing head and the valve stem guide sleeve are coaxial, it is not easy to vibrate.

[0024] As a preferred embodiment, a plurality of T-blocks 6 are evenly arranged around the first through hole 3 on the lower surface of the base 1, and one end of the vertical portion of the T-block 6 away from the horizontal portion is fixedly connected to the lower surface of the base 1. After the T-blocks 6 are arranged, it is convenient to install the base 1 in the T-slot on the middle working table of the honing machine through the T-blocks 6. Figure 3 As shown, the base 1 is locked on the middle working table of the honing machine by using the hexagon socket round head screw with a hexagon socket wrench, and then the intermediate block 2 is fixed on the base 1.

[0025] As a preferred embodiment, the base 1 is made of HT200 material because it is a supporting member, mainly because HT200 material has good casting performance, good cutting performance, good vibration absorption performance, and good anti-friction and wear performance.

[0026] As a preferred method, the middle block 2 is made of Q235 sheet because the Q235 sheet is cheap and practical, and has good plasticity and toughness, and the middle block 2 is a replacement part for fine-machined inner holes of valve stem guide sleeves of different models.

[0027] As a preferred embodiment, the base 1 is a cylinder, which is easy to install and position and saves processing costs. The intermediate block 2 is arranged on the end face of the cylinder.

[0028] As a preferred embodiment, the intermediate block 2 is a cylinder.

[0029] As a preferred method, in order to adapt to the processing of the inner hole (inner surface) of the valve stem guide sleeve 9 of different models, the intermediate block 2 includes a plurality of block units, each of which is provided with a notch 7, the length direction of which is parallel to the end face of the base 1 and perpendicular to the central axis of the base 1, and each of which is provided with a screw hole 8 away from the notch 7, the screw hole 8 is located between the end of the notch 7 facing away from the central axis of the base 1 and the central axis of the base 1, and the block unit is fixedly connected to the base 1 by a first bolt 5 penetrating the notch 7. After such a setting, when encountering a valve stem guide sleeve 9 of a relatively large model, the central axis of each block unit facing away from the first through hole 3 is moved to a preset distance, so that the distance between the screw hole 8 and the central axis of the first through hole 3 becomes larger, and then the light hole of the larger valve stem guide sleeve 9 can be used. When encountering a relatively small valve stem guide sleeve 9, the middle lines of the first through holes 3 of each block unit box are brought closer together, so that the distance between the screw hole 8 and the central axis of the first through hole 3 is closer, so that the light hole on the smaller valve stem guide sleeve 9 can be coaxial with the screw hole 8 on the block unit, thereby locking the smaller valve stem guide sleeve 9 on the middle block. Since the screw hole 8 is located between the end of the notch 7 facing away from the central axis of the base 1 and the central axis of the base 1, this arrangement ensures that the first bolt 5 that locks the middle block 2 and the base 1 together will not affect the second bolt 10 used to lock the valve stem guide sleeve 9 and the middle block 2.

[0030] As a preferred embodiment, an expansion opening is provided on the upper surface of the intermediate block 2 at the slot 7, the width and length of the expansion opening are both greater than the width and length of the slot 7, and the depth of the expansion opening is greater than or equal to the head of the first bolt 5, so that after the first bolt 5 fixes the intermediate block 2 and the base 1 together, the top of the first bolt 5 will be lower than or aligned with the upper surface of the intermediate block 2, thereby not affecting the fixing of the valve stem guide sleeve 9 on the intermediate block 2.

Claims

1. An auxiliary installation device for honing the inner hole of a valve stem guide sleeve, characterized in that: The invention comprises a base (1) and an intermediate block (2), wherein a first through hole (3) is provided at the center of the base (1), a second through hole (4) is provided on the intermediate block (2), the intermediate block (2) is fixed to the upper surface of the base (1) by a first bolt (5), the first through hole (3) is coaxial with the second through hole (4), the inner diameter of the first through hole (3) is larger than the inner diameter of the second through hole (4), and at least two screw holes (8) are axially provided on the upper surface of the intermediate block (2) around the second through hole (4).

2. The auxiliary installation device for honing the inner hole of a valve stem guide sleeve according to claim 1, characterized in that: A plurality of T-shaped blocks (6) are evenly arranged around the first through hole (3) on the lower surface of the base (1), and one end of the vertical portion of the T-shaped block (6) away from the horizontal portion is fixedly connected to the lower surface of the base (1).

3. The auxiliary installation device for honing the inner hole of a valve stem guide sleeve according to claim 1, characterized in that: The base (1) is made of HT200 material.

4. The auxiliary installation device for honing the inner hole of a valve stem guide sleeve according to claim 1, characterized in that: The middle block (2) is made of Q235 plate.

5. The auxiliary installation device for honing the inner hole of a valve stem guide sleeve according to claim 1, characterized in that: The base (1) is a cylinder, and the intermediate block (2) is arranged on the end surface of the cylinder.

6. The auxiliary installation device for honing the inner hole of a valve stem guide sleeve according to claim 5, characterized in that: The middle block (2) is a cylinder.

7. The auxiliary installation device for honing the inner hole of a valve stem guide sleeve according to claim 5, characterized in that: The intermediate block (2) comprises a plurality of block units, each of which is provided with a notch (7), the length direction of the notch (7) being parallel to the end surface of the base (1) and perpendicular to the central axis of the base (1), each of which is provided with a screw hole (8) away from the notch (7), the screw hole (8) being located between one end of the notch (7) facing away from the central axis of the base (1) and the central axis of the base (1), and the block unit is fixedly connected to the base (1) by a first bolt (5) penetrating the notch (7).

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