Bushing machining tool

Abstract

The utility model relates to a bush machining tool. The bush machining tool comprises a positioning body and a pressing piece, the positioning body is provided with a cavity used for containing a bush to be machined, a limiting step used for abutting against one end of the bush to be machined is arranged on one side in the cavity, and the pressing piece is used for abutting against the other end of the bush to be machined. The positioning body and the pressing piece are arranged on the base so that the lining to be machined can be positioned and clamped through the combined action of the positioning body and the pressing piece, and a second through hole used for machining a first through hole in the side wall of the lining to be machined is formed in the positioning body. The utility model solves the problems that the existing bushing processing method needs more than three times of positioning, so that processed chamfers are non-uniform in size, and the processing precision is low.

Description

Technical Field

[0001] This utility model relates to the field of bushing processing technology, and specifically to a bushing processing tooling. Background Technology

[0002] In recent years, with the widespread use of mechanical pumps, the bushing, as a key transmission component in the fuel pump's guide piston assembly, directly affects the efficiency of the fuel injection pump. Against the backdrop of higher performance demands in the diesel engine market, higher fuel injection pressures are necessary to meet the stringent requirements of modern diesel engines for power, economy, and emissions. This leads to increased load between the fuel pump and the camshaft box, thus exacerbating mechanical wear between the guide piston assembly and the camshaft. In the design of the guide piston assembly, the bushing, located between the roller and roller pin, acts as a buffer and is the most wear-prone part of the entire transmission system; therefore, its quality is particularly critical.

[0003] Currently, such as Figure 4 As shown, bushing designs commonly employ a structure with through holes and internal / external chamfers to form a stable oil film during operation, reducing friction. The internal and external chamfers of the through holes are crucial for smooth lubricant flow; therefore, improving the machining accuracy of the internal and external chamfers is key to ensuring smooth operation of the fuel pump. However, existing machining technologies require more than three positioning and machining operations when processing circumferential holes and internal / external chamfers, making it difficult to maintain a uniform reference point, resulting in inconsistent chamfer dimensions and affecting machining accuracy. With increasingly stringent requirements, there is an urgent need to develop a new tooling fixture to achieve precise machining of through holes and chamfers, ensuring product machining quality. Utility Model Content

[0004] The purpose of this utility model is to provide a bushing processing fixture to solve the problem that the existing bushing processing method requires more than three positioning operations, resulting in uneven chamfer size and low processing accuracy.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A bushing processing fixture includes a positioning body and a clamping member. The positioning body has a cavity for accommodating the bushing to be processed. One side of the cavity is provided with a limiting step for abutting against one end of the bushing to be processed. The clamping member abuts against the other end of the bushing to be processed. The positioning body and the clamping member work together to position and clamp the bushing to be processed. The positioning body is provided with a second through hole for processing a first through hole on the side wall of the bushing to be processed.

[0007] According to the above technical means, through the cooperation of the positioning body and the pressing piece, accurate positioning and clamping of the to-be-processed bushing are realized, and the stability and precision in the processing process are guaranteed. By providing a cavity on the positioning body for accommodating the to-be-processed bushing, and ingeniously providing a limiting step on one side of the cavity and abutting against one end of the to-be-processed bushing, and the pressing piece is used to abut against the other end of the to-be-processed bushing, so that through the cooperation of the limiting step and the pressing piece, the movement of the to-be-processed bushing in the processing process can be effectively limited, the stability of the bushing is enhanced, the processing error caused by the shaking of the bushing in the processing process is avoided, and the processing efficiency and quality are improved. By providing a second through hole on the positioning body for processing a first through hole on the side wall of the to-be-processed bushing, the design makes the processing process more convenient, and different position through hole processing can be completed without replacing the tooling, improving the processing efficiency and flexibility. This tooling can complete the processing of two directions (i.e. the opposite two side walls of the positioning body) and three types of sizes (including the first through hole, the external chamfer of the first through hole and the internal chamfer of the first through hole) at one time, fully guaranteeing the positioning reference of the product and greatly reducing the possibility of local wear of the bushing, thereby guaranteeing the processing size precision and can be widely applied to the circumferential hole and chamfer processing of various annular bushings. The existing bushing processing method needs more than three times of positioning, which causes the size of the processed chamfer to be uneven, resulting in low processing precision.

[0008] Preferably, a positioning pin is arranged in the second through hole.

[0009] By arranging the positioning pin, the first through hole processed on the to-be-processed bushing is cooperated, double positioning is effectively realized, and the precision of subsequent processing is improved.

[0010] Preferably, a first buffer gasket is arranged between the inner wall of the cavity and the to-be-processed bushing.

[0011] By arranging the first buffer gasket between the inner wall of the cavity and the to-be-processed bushing, the collision energy between the to-be-processed bushing and the positioning body in the processing process is effectively absorbed, thereby preventing damage to the to-be-processed bushing in the processing process.

[0012] Preferably, a second buffer gasket is arranged between the pressing piece and the to-be-processed bushing.

[0013] By arranging the second buffer gasket between the pressing piece and the to-be-processed bushing, the collision energy between the to-be-processed bushing and the pressing piece in the processing process is effectively absorbed, thereby preventing damage to the to-be-processed bushing in the processing process.

[0014] Preferably, a handle is arranged on the pressing piece.

[0015] By arranging the handle on the pressing piece, it is convenient for the operator to hold the handle to screw in and out of the pressing piece.

[0016] Preferably, the cavity is a through hole in a cylindrical configuration.

[0017] By setting the cavity as a through hole in a cylindrical configuration, both clamping of the bush to be machined and internal chamfering of the through hole of the bush to be machined are facilitated.

[0018] Preferably, the positioning body has a clamping portion for clamping of a jaw and a positioning portion for clamping of the bush to be machined, and the positioning portion is provided with a cavity for accommodating the bush to be machined.

[0019] By setting the positioning body as a clamping portion for clamping of a jaw and a positioning portion for clamping of the bush to be machined, both clamping of the bush to be machined and clamping of the machining tool itself are facilitated, and the two clamping operations do not interfere with each other.

[0020] Preferably, the second through hole is provided on three side walls of the positioning portion.

[0021] By providing the second through hole on three side walls of the positioning portion, machining of the first through hole on the side wall of the bush to be machined is facilitated.

[0022] Preferably, the axis of the clamping portion is perpendicular or tends to be perpendicular to the axis of the cavity.

[0023] Preferably, the inner cavity wall of the cavity is in threaded cooperation with the outer side wall of the pressing member.

[0024] The threaded cooperation between the inner cavity wall of the cavity and the outer side wall of the pressing member facilitates disassembly and assembly of the pressing member.

[0025] Preferably, the pressing member is a screw plug.

[0026] The beneficial effects of the present utility model are as follows:

[0027] The bushing machining tool of the ball valve, through cooperation of the positioning body and the pressing part, realizes accurate positioning and clamping of the bushing to be machined, and guarantees stability and precision in the machining process. Through the cavity for accommodating the bushing to be machined arranged on the positioning body of the tool, and the limit step arranged on one side in the cavity and abutting against one end of the bushing to be machined, and the pressing part abutting against the other end of the bushing to be machined, the movement of the bushing to be machined in the machining process is effectively limited through cooperation of the limit step and the pressing part, the stability of the bushing is enhanced, the machining error caused by the shaking of the bushing in the machining process is avoided, and the machining efficiency and quality are improved. Through the second through hole for machining the first through hole on the side wall of the bushing to be machined arranged on the positioning body, the machining process is more convenient, the through hole machining at different positions can be completed without replacing the tool, and the machining efficiency and flexibility are improved. The tool can complete machining of two directions (namely, the opposite two side walls of the positioning body) and three types of sizes (including the first through hole, the external chamfer of the first through hole and the internal chamfer of the first through hole) through one clamping, the positioning reference of the product is fully guaranteed, the possibility of local wear of the bushing is greatly reduced, the machining size precision is guaranteed, and the tool can be widely applied to the circumferential hole and chamfer machining of various annular bushings. The tool has the advantages of compact structure, accurate positioning, stable clamping, high machining efficiency and good flexibility, and has the value of popularization and application in the field of bushing machining technology. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structure schematic view of the bushing machining tool of the utility model;

[0029] Figure 2 It is a top view of the bushing machining tool;

[0030] Figure 3 It is Figure 2 It is a sectional view along A-A;

[0031] Figure 4 It is a structure schematic view of the bushing to be machined;

[0032] Among them, 1-positioning body, 11-cavity, 12-limit step, 13-second through hole, 14-clamping part, 15-positioning part; 2-pressing part; 3-positioning pin; 4-first buffer washer; 5-second buffer washer; 6-handle; 7-bushing to be machined, 71-first through hole. DETAILED DESCRIPTION

[0033] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex. Example

[0035] like Figures 1 to 4 As shown, a bushing processing fixture includes a positioning body 1 and a clamping member 2. The positioning body 1 has a cavity 11 for accommodating a bushing 7 to be processed. One side of the cavity 11 is provided with a limiting step 12 for abutting against one end of the bushing 7 to be processed. The clamping member 2 is used to abut against the other end of the bushing 7 to be processed, so that the positioning body 1 and the clamping member 2 work together to achieve positioning and clamping of the bushing 7 to be processed. The positioning body 1 is provided with a second through hole 13 for processing the first through hole 71 on the side wall of the bushing 7 to be processed.

[0036] The precise positioning and clamping of the bushing to be processed are achieved through the combined use of the positioning body and the clamping component, ensuring stability and accuracy during the processing. The positioning body of the fixture has a cavity for accommodating the bushing to be processed, and a limiting step is cleverly set on one side of the cavity, abutting against one end of the bushing 7. The clamping component abuts against the other end of the bushing. Through the combined action of the limiting step and the clamping component, the movement of the bushing during processing is effectively restricted, enhancing its stability and avoiding processing errors caused by bushing wobbling, thus improving processing efficiency and quality. The design of a second through hole on the positioning body for machining the first through hole on the side wall of the bushing makes the processing more convenient, allowing for the machining of through holes in different positions without changing the fixture, improving processing efficiency and flexibility. This fixture can complete the machining of two directions (i.e., the two opposite sidewalls of the positioning body) and three types of dimensions (including the first through hole, the external chamfer of the first through hole, and the internal chamfer of the first through hole) in one clamping, and can well guarantee the machining dimensional accuracy. It can be widely used for the machining of circumferential holes and chamfers of various ring bushings.

[0037] The sleeve processing tool has no complex structure and size requirements, and is convenient for mass production in actual industrial production.

[0038] In some embodiments, in order to facilitate cooperation with the machined first through hole 71 on the to-be-processed sleeve 7 to achieve double positioning and improve the accuracy of subsequent processing, a positioning pin 3 cooperating with the second through hole 13 is arranged.

[0039] In some embodiments, in order to effectively absorb the collision energy between the to-be-processed sleeve 7 and the positioning body 1 during processing, thereby preventing damage to the to-be-processed sleeve 7 during processing, a first buffer washer 4 is arranged between the inner wall of the cavity 11 and the to-be-processed sleeve 7.

[0040] In some embodiments, in order to effectively absorb the collision energy between the to-be-processed sleeve 7 and the pressing member 2 during processing, thereby preventing damage to the to-be-processed sleeve during processing, a second buffer washer 5 is arranged between the pressing member 2 and the to-be-processed sleeve 7.

[0041] In some embodiments, in order to facilitate the operator to hold the handle 6 for easy rotation of the pressing member 2 and the handle 6, the handle 6 is arranged on the pressing member 2.

[0042] The handle 6 is fixedly arranged on the outer side wall of the pressing member 2.

[0043] In some embodiments, in order to facilitate clamping of the to-be-processed sleeve 7 and facilitate internal chamfering of the first through hole 71 of the to-be-processed sleeve 7, the cavity 11 is arranged in a cylindrical through hole structure.

[0044] In some embodiments, the positioning body 1 has a clamping portion 14 for clamping with a jaw and a positioning portion 15 for clamping the to-be-processed sleeve 7, and the positioning portion 15 is provided with a cavity for accommodating the to-be-processed sleeve 7. The clamping of the sleeve processing tool itself and the clamping of the to-be-processed sleeve are facilitated at the same time, and the clamping of the two does not interfere with each other.

[0045] The positioning body 1 is integrally formed.

[0046] The clamping portion 14 is in a cylindrical structure.

[0047] In some embodiments, in order to facilitate processing of the first through hole 71 on the side wall of the to-be-processed sleeve 7, a second through hole 13 is arranged on each of the three side walls of the positioning portion 15.

[0048] The two second through holes 13 are arranged on the opposite two side walls of the positioning portion 15, and the other second through hole 13 is arranged in the axial direction of the clamping portion 14. The positioning pin 3 is arranged in the second through hole 13 arranged in the axial direction of the clamping portion 14.

[0049] In some embodiments, the axis of the clamping portion 14 is perpendicular or tends to be perpendicular to the axis of the cavity 11.

[0050] In some embodiments, in order to facilitate the disassembly of the compression member 2, the inner cavity wall of the cavity 11 and the outer side wall of the compression member 2 are threadedly engaged.

[0051] For example, the compression member 2 is a threaded plug.

[0052] The utility model discloses a bushing processing frock, in actual use, the first buffer washer 4 is set into the bushing 7 of waiting for processing, then together from the side of not setting the limiting step 12 is put into the cavity 11 of the positioning body 1, and the second buffer washer 5 is loaded, subsequently the screw plug of installing handle 6 is along the thread of positioning body 1 and is screwed in until fastening (is screwed tightly through handle 5). After fastening well the bushing 7 of waiting for processing, through the dog of machine tool clamping the clamping portion 14 of positioning body 1, subsequently through the replacement machine tool spindle tool, the drilling, milling mode of use of the two opposite second through -hole 13 on the positioning body 1 processes the two opposite first through -hole 71 of waiting for processing bushing 7 and the external chamfer of first through -hole 71. Subsequently, the dog is rotated 45 along the axis of clamping portion 14 °, can let the bushing 7 of waiting for processing keep 45 ° inclination's clamping positioning state, after spindle changes milling cutter, directly with the 45 of bushing 7 of waiting for processing Direction horizontal through the one end of cavity 11 enters the inside of bushing 7 of waiting for processing, processes the internal chamfer of one first through -hole 71 of processing bushing 7, similarly, processes the internal chamfer of another first through -hole 71 of processing bushing 7, at this time, has completed in two first through -hole 71 and its internal and external chamfer in clamping processing. At this time, a small amount of screw plug is screwed out, subsequently along the axial direction of bushing 7 of waiting for processing manually rotates bushing 7 of waiting for processing, and the second through -hole 13 along the axial direction of clamping portion 14 of positioning pin 3 is screwed into the first through -hole 71 of bushing 7 of waiting for processing and has been processed and realizes double positioning, and then tightens the screw plug, can let bushing 7 of waiting for processing carry out circumferential direction's steering under the condition that the machine tool clamping is not removed, rotates positioning bushing 7 of waiting for processing to another position of drilling. Repeat the replacement machine tool spindle tool, and the drilling, milling mode of use of the two opposite second through -hole 13 on the positioning body 1 processes the two first through -hole 71 of waiting for processing bushing 7 and the external chamfer of two first through -hole 71, subsequently, the dog is rotated 45 along the axis of clamping portion 14 °, can let the bushing 7 of waiting for processing keep 45 ° inclination's clamping positioning state, after spindle changes milling cutter, directly with the 45 of bushing 7 of waiting for processing Direction horizontal through the one end of cavity 11 processes the internal chamfer of another first through -hole 71 of waiting for processing bushing 7, can complete the drilling of all external circles on bushing 7 of waiting for processing and its internal and external chamfer processing. This frock design structure is simple, and easy processing, directly solves the problem that internal hole chamfer is difficult to guarantee the consistent size. And need not operator to have higher skill and experience, can complete all aperture processing even internal and external chamfer in clamping once, and the processing efficiency is high, is suitable for mass production.

[0053] In summary, the bushing machining tool of the utility model, through the synergistic effect of the positioning body and the compression piece, ensures the accurate positioning and firm clamping of the bushing during machining, thereby improving the stability and accuracy of machining. The positioning body of the tool is internally provided with a cavity accommodating the bushing, and a limiting step is designed on one side to contact one end of the bushing, while the compression piece contacts the other end of the bushing. This design effectively limits the movement of the bushing during machining, enhances its stability, avoids machining errors caused by the shaking of the bushing, and further improves the machining efficiency and quality. In addition, the positioning body is also provided with a second through hole for machining a first through hole on the side wall of the bushing, which makes the machining process more convenient, and different position through hole machining can be completed without replacing the tool, further improving the machining efficiency and flexibility. The tool can complete the machining of two directions (i.e. the two side wall directions of the positioning body) and three sizes (including the first through hole, the external chamfer and the internal chamfer) at one time, ensures the positioning reference of the product, significantly reduces the risk of local wear of the bushing, and guarantees the accuracy of the machining size. It is suitable for the circumferential hole and chamfer machining of various annular bushings, has the advantages of compact structure, accurate positioning, stable clamping, high machining efficiency and flexible operation, etc. This tool solves the problem of multiple positioning in the existing bushing machining method, avoids the defect of different sizes of chamfer machining, thereby improving the machining accuracy. In the field of bushing machining technology, it has the value of popularization and application.

[0054] The above examples are only preferred embodiments for fully illustrating the utility model, and the protection scope of the utility model is not limited thereto. Equivalent replacements or transformations made by those skilled in the art on the basis of the utility model are within the protection scope of the utility model.

Claims

1. A bushing machining tool characterized by, The positioning body (1) has a cavity (11) for accommodating a bushing (7) to be processed, one side of the cavity (11) is provided with a limiting step (12) for abutting with one end of the bushing (7) to be processed, and the pressing part (2) is used for abutting with the other end of the bushing (7) to be processed, so as to realize the positioning and clamping of the bushing (7) to be processed through the cooperation of the positioning body (1) and the pressing part (2), and the positioning body (1) is provided with a second through hole (13) for processing a first through hole (71) on the side wall of the bushing (7) to be processed.

2. The bushing machining tooling fixture of claim 1, wherein, The second through hole (13) is provided with a positioning pin (3).

3. The bushing machining tooling fixture of claim 1, wherein, The inner wall of the cavity (11) and the bushing (7) to be processed are provided with a first buffer washer (4).

4. The bushing machining tooling fixture of claim 1, wherein, The pressing part (2) and the bushing (7) to be processed are provided with a second buffer washer (5).

5. The bushing machining tooling fixture of claim 1, wherein, The pressing part (2) is provided with a handle (6).

6. The bushing machining tooling fixture of claim 1, wherein, The cavity (11) is a cylindrical through hole.

7. The bushing machining tooling fixture of claim 6, wherein, The positioning body (1) has a clamping part (14) for clamping and a positioning part (15) for clamping the bushing (7) to be processed, and the positioning part (15) is provided with a cavity for accommodating the bushing (7) to be processed.

8. The bushing machining tooling fixture of claim 7, wherein, The second through hole (13) is provided on three side walls of the positioning part (15).

9. The bushing machining tooling fixture of claim 7, wherein, The axis of the clamping part (14) is perpendicular or tends to be perpendicular to the axis of the cavity (11).

10. The bushing machining tool of claim 1, wherein, The inner cavity wall of the cavity (11) and the outer side wall of the pressing part (2) are screw threads matched; And / or, the pressing part (2) is a screw plug.

Images