Fixture for accurate grinding of inner hole of water injection pump cylinder sleeve

Abstract

The utility model relates to a water injection pump cylinder sleeve inner hole accurate grinding machining clamp which comprises a plurality of fixing rods, threaded sections are formed at the two ends of each fixing rod, and nuts are connected to the threaded sections. The two fixing rings comprise the top end fixing ring and the bottom end fixing ring, the top end fixing ring is connected to the top end of the cylinder sleeve in a sleeving mode and abuts against the outer circle protruding ring at the top end, and the bottom end fixing ring is connected to the bottom end of the cylinder sleeve in a sleeving mode and abuts against the outer circle protruding ring at the bottom end; the fixing rods are distributed on the periphery of the cylinder sleeve in the circumferential direction, the two ends of each fixing rod penetrate through rod holes of the top end fixing ring and the bottom end fixing ring respectively, the fixing rods are connected with nuts after penetrating through the fixing rods, and therefore the top end fixing ring and the bottom end fixing ring are axially locked on the cylinder sleeve. The condition that the machining center deviates due to elastic displacement in the inner hole accurate grinding machining process of the cylinder sleeve is avoided, and the surface roughness of the inner hole of the cylinder sleeve subjected to accurate grinding machining is smaller than Ra0.4 and reaches the qualified standard.

Description

Technical Field

[0001] The utility model relates to the field of fixtures, in particular to a fixture for fine grinding the inner hole of a cylinder sleeve of a water injection pump. Background Art

[0002] The inner grinding process of the cylinder liner is to grind the inner hole of the cylinder liner after the inner hole of the cylinder liner is laser clad, so that the surface roughness reaches less than Ra0.4. At present, during the processing, the part to be processed needs to be fixed on the lathe chuck to grind the inner hole of the part surface.

[0003] For example, for the YF300 water injection pump Φ180 model cylinder sleeve with a length of 285mm, during the fine grinding process of its inner hole wall, the part far away from the clamping end often undergoes elastic deformation due to the machining force, resulting in a slight displacement, causing the cylinder sleeve to deviate from the machining center line, so that the surface roughness of the inner hole of the cylinder sleeve after fine grinding is greater than Ra0.4, which does not meet the quality requirements and results in defective products. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a water injection pump cylinder liner inner hole fine grinding fixture to solve the problem of defective products due to excessive inner hole surface roughness during the fine grinding process of the cylinder liner product.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] Provided is a water injection pump cylinder sleeve inner hole fine grinding fixture, comprising

[0007] A plurality of fixing rods, both ends of which are formed with threaded sections, and nuts are connected to the threaded sections;

[0008] Two fixing rings, namely a top fixing ring and a bottom fixing ring, wherein the top fixing ring is sleeved on the top of the cylinder sleeve and abuts against the outer convex ring at the top, and the bottom fixing ring is sleeved on the bottom of the cylinder sleeve and abuts against the outer convex ring at the bottom;

[0009] The fixing rods are circumferentially distributed around the cylinder sleeve, and the two ends of the fixing rods pass through the rod holes of the top fixing ring and the bottom fixing ring respectively. After passing through, the fixing rods are connected with nuts to axially lock the top fixing ring and the bottom fixing ring on the cylinder sleeve.

[0010] Furthermore, the number of the fixing rods is four.

[0011] Furthermore, the length of the cylinder liner is 285 mm.

[0012] Furthermore, the nut is an M18 nut.

[0013] The beneficial effects of the utility model are:

[0014] The utility model provides a clamp for fine grinding the inner hole of a water injection pump cylinder sleeve. Through the fastening of a fixing ring and the supporting effect of a fixing rod, the clamp can avoid the deviation of the machining center due to elastic displacement during the fine grinding of the inner hole of the cylinder sleeve, so that the surface roughness of the inner hole of the cylinder sleeve after fine grinding can reach less than Ra0.4, reaching the qualified standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the precision grinding fixture of the inner hole of the cylinder sleeve of the water injection pump of the utility model on the chuck;

[0017] Figure 2 It is a schematic diagram of the utility model of the water injection pump cylinder sleeve inner hole fine grinding processing fixture clamping the cylinder sleeve;

[0018] Figure 3 It is a schematic diagram of the cylinder sleeve;

[0019] Figure 4 This is a schematic diagram of a fixture for fine grinding the inner hole of a cylinder sleeve of a water injection pump of the utility model;

[0020] Among them, 1. fixing rod, 11. nut;

[0021] 21. top fixing ring, 22. bottom fixing ring;

[0022] 3. Cylinder liner, 31. Outer convex ring;

[0023] 4. Chuck. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The present application provides a water injection pump cylinder sleeve inner hole fine grinding fixture, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0026] In order to solve the technical problem of defective products due to excessive inner hole surface roughness in the fine grinding process of cylinder liner products in the prior art, an embodiment of the present application provides a water injection pump cylinder liner inner hole fine grinding fixture, which is described in detail below.

[0027] like Figures 1 to 4 As shown, a water injection pump cylinder sleeve inner hole fine grinding fixture, comprising

[0028] A plurality of fixing rods 1, both ends of the fixing rods 1 are formed with threaded sections, and nuts 11 are connected to the threaded sections;

[0029] Two fixing rings, namely a top fixing ring 21 and a bottom fixing ring 22, wherein the top fixing ring 21 is sleeved on the top of the cylinder sleeve 3 and abuts against the outer convex ring 31 at the top, and the bottom fixing ring 22 is sleeved on the bottom of the cylinder sleeve 3 and abuts against the outer convex ring 31 at the bottom;

[0030] Each fixing rod 1 is circumferentially distributed around the cylinder liner 3, and both ends of the fixing rod 1 pass through the rod holes of the top fixing ring 21 and the bottom fixing ring 22 respectively. After passing through, the fixing rod 1 is connected with the nut 11, so as to axially lock the top fixing ring 21 and the bottom fixing ring 22 on the cylinder liner 3.

[0031] Specifically, as an optional implementation in this embodiment, Figures 1 to 4 As shown, the number of the fixing rods 1 is four.

[0032] In this embodiment, the length of the cylinder sleeve 3 is 285 mm.

[0033] In this embodiment, the nut 11 is an M18 nut 11 .

[0034] During assembly, Figure 1 Figure 2 As shown, the bottom of the cylinder sleeve 3 is inserted into the bottom fixing ring 22, the bottom fixing ring 22 is abutted against the outer circular convex ring 31 at the bottom end of the cylinder sleeve 3, and then the lower end of the fixing rod 1 is inserted into the rod hole of the bottom fixing ring 22, and then the nut 11 is connected, and then the top fixing ring 21 is inserted into the cylinder sleeve 3, the top fixing ring 21 is abutted against the outer circular convex ring 31 at the top end of the cylinder sleeve 3, and then the nut 11 is connected, and finally the assembled cylinder sleeve 3 with the clamp is clamped on the grinding machine chuck 4 as a whole, as shown in FIG. Figure 1 shown.

[0035] The water injection pump cylinder liner inner hole fine grinding fixture of the utility model avoids the cylinder liner 3 3 from shifting the machining center due to elastic displacement during the inner hole fine grinding process through the fastening of the fixing ring and the supporting effect of the fixing rod 1, so that the surface roughness of the inner hole of the cylinder liner 3 after fine grinding reaches less than Ra0.4, reaching the qualified standard.

[0036] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0037] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0040] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0041] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0042] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A fixture for fine grinding the inner hole of a water injection pump cylinder sleeve, characterized in that: include A plurality of fixing rods (1), both ends of the fixing rods (1) forming threaded sections, and nuts (11) being connected to the threaded sections; Two fixing rings, namely a top fixing ring (21) and a bottom fixing ring (22), wherein the top fixing ring (21) is sleeved on the top of the cylinder sleeve (3) and abuts against the outer circular convex ring (31) at the top, and the bottom fixing ring (22) is sleeved on the bottom of the cylinder sleeve (3) and abuts against the outer circular convex ring (31) at the bottom; Each fixing rod (1) is circumferentially distributed around the cylinder sleeve (3), and both ends of the fixing rod (1) pass through the rod holes of the top fixing ring (21) and the bottom fixing ring (22) respectively. After passing through, the fixing rod (1) is connected to the nut (11), thereby axially locking the top fixing ring (21) and the bottom fixing ring (22) on the cylinder sleeve (3).

2. The water injection pump cylinder liner inner hole fine grinding fixture according to claim 1 is characterized in that: The number of the fixing rods (1) is four.

3. The water injection pump cylinder liner inner hole fine grinding fixture according to claim 1 is characterized in that: The length of the cylinder sleeve (3) is 285 mm.

4. The water injection pump cylinder liner inner hole fine grinding fixture according to claim 1 is characterized in that: The nut (11) is an M18 nut.

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