CN216656464U

CN216656464U - Drill jig

Info

Publication number: CN216656464U
Application number: CN202123085852.XU
Authority: CN
Inventors: 薛小星; 龚雅娟; 谢勇军; 罗帆; 颜金园; 程超; 刘璇
Original assignee: 722th Research Institute of CSIC
Current assignee: 722th Research Institute of CSIC
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-06-03
Anticipated expiration: 2031-12-09

Abstract

The utility model discloses a drill jig, which belongs to the technical field of metal processing, and is characterized in that the drill jig is arranged into a sleeve cover type structure, so that the drill jig can be connected to the end part to be processed of a shaft part in a threaded connection mode, and the drill jig is used for processing and positioning various characteristics of the end face and the excircle of the part. The drill jig disclosed by the utility model is simple in structure and easy and convenient to use, and can realize threaded connection on the end part of the oil distribution shaft to be processed, so that the drill jig and the oil distribution shaft can form an integral structure, the convenience and accuracy of the setting of the drill jig are ensured, the time for aligning and clamping the drill jig and the oil distribution shaft is reduced, the scribing process of the oil distribution shaft can be completed only by one-time assembly, the assembly positioning efficiency of the drill jig and the oil distribution shaft is greatly improved, the processing cost of the oil distribution shaft is reduced, and the drill jig has better practical value and popularization prospect.

Description

Drill jig

Technical Field

The utility model belongs to the technical field of metal processing, and particularly relates to a drill jig.

Background

The oil distribution shaft is used as an important part of the hydraulic motor and is obviously characterized in that through oil way holes are formed in the axial direction and the radial direction. Meanwhile, for some special oil distribution shafts, not only hydraulic oil needs to be supplied to the hydraulic motor, but also an important connecting part for connecting a hydraulic system and the device main body frame is needed.

Generally, one end of the oil distribution shaft is provided with a hydraulic motor mounting counter bore, the end face of the oil distribution shaft is provided with a plurality of deep holes with different oil cavities and a plurality of groups of positioning mounting screw holes, and the excircle of the oil distribution shaft is provided with a plurality of groups of key slots and oil holes. In a conventional machining process, the main processes of the oil distribution shaft often include: turning (processing excircle and end face), clamping (drilling end face hole, drawing outer round hole, and groove position dimension line), milling (processing outer round hole, groove), grinding (grinding each sealing position of excircle), and the like.

In the process, machining of each hole on the oil distribution shaft is often required to be performed by virtue of marking and positioning on the dividing head by virtue of a bench worker, and although the requirement of actual machining can be met to a certain extent, the workload is large, the efficiency is low, and the precision is poor. Meanwhile, the holes on the end face of the oil distribution shaft are dense and are close to the edge, so that the conventional drill jig mostly has no pressure-tight position on the end face, and no accurate positioning reference exists between the drill jig and the oil distribution shaft, and the drill jig and the part can be ensured to be coaxial only by means of manual adjustment and visual observation of an operator. On the other hand, after the existing jig and the part are adjusted to be coaxial, because the jig and the part are of a split structure, the angular reference of the jig still needs to be transferred to the part, and then all the characteristics of the excircle are scribed by the upper dividing head. Although the method can save the scribing time of each hole on the end face, the adjusting time of the drill jig and the part is increased, 2 times of clamping is often needed, the positioning efficiency of the drill jig and the part is seriously influenced, and the processing cost of the oil distribution shaft is increased.

SUMMERY OF THE UTILITY MODEL

Aiming at one or more of the defects or the improvement requirements in the prior art, the utility model provides the drill jig which can realize the quick and accurate positioning of the drill jig and the oil distribution shaft part, improve the efficiency and the precision of the oil distribution shaft processing and reduce the processing cost of the oil distribution shaft.

In order to achieve the purpose, the utility model provides a drill jig which comprises a body in a sleeve cover type structure;

an end surface hole is coaxially formed in the end surface of one side of the body, and internal threads are formed in the inner peripheral wall surface of the end surface hole, so that the body can be connected to the end part to be machined of the corresponding shaft part in a threaded connection mode;

the end face of the body, which is far away from the end face hole, is provided with a plurality of processing positioning holes communicated with the end face hole and at least one fastening screw mounting hole; the processing positioning hole is used for processing and positioning a corresponding hole on the end part to be processed; the fastening screw mounting hole is used for mounting a fastening screw when the drill jig is connected to the end part to be machined, so that the end part of the fastening screw abuts against the end face of the end part to be machined;

and simultaneously, the body deviates from an angle reference is upwards arranged on the end face of the end face hole and/or the peripheral ring of the body and is used for positioning the processing characteristics of the shaft part in the peripheral ring direction.

As a further improvement of the utility model, the shaft part is an oil distribution shaft, a plurality of axial oil holes are arranged between two end faces of the shaft part, and a plurality of radial oil holes are arranged on the periphery of the oil distribution shaft.

As a further improvement of the utility model, a thread relief groove is formed on the inner peripheral wall surface of the bottom of the end surface hole along the circumferential direction, and the inner diameter of the thread relief groove is not less than the outer diameter of the end part to be machined.

As a further improvement of the utility model, the axial length of the thread withdrawal groove is 3 mm-5 mm.

As a further improvement of the utility model, the angular reference is set by at least one of scribing, milling a groove and setting a boss plane.

As a further improvement of the utility model, a drill bushing is arranged in the processing positioning hole.

As a further improvement of the present invention, the outer peripheral surface of the body is subjected to a nitriding surface hardening treatment.

As a further improvement of the present invention, the material of the jig is the same as that of the shaft-like part.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

In general, compared with the prior art, the technical scheme conceived by the utility model has the following beneficial effects:

(1) according to the drill jig disclosed by the utility model, the drill jig is arranged into the sleeve cover type structure, so that the drill jig can be connected to the end part to be processed of the shaft part in a threaded connection mode to process and position the end surface shaft hole of the end part, the matching and positioning process of the drill jig and the part is simplified, the matching and positioning time of the drill jig and the part is greatly shortened while the positioning accuracy of the drill jig is ensured, the accuracy and efficiency of the drill jig based processing are improved, and the processing cost of the corresponding shaft part is reduced.

(2) According to the drill jig disclosed by the utility model, the thread relief groove is formed in the bottom of the end surface hole of the drill jig, so that when the drill jig is matched with a part, the end surface of the part can abut against the bottom surface of the end surface hole, the accuracy and reliability of matching of the drill jig and the part are further improved, and the processing precision of the part is ensured.

(3) The drill jig disclosed by the utility model is simple in structure and easy and convenient to use, and can realize threaded connection on the end part of the oil distribution shaft to be processed, so that the drill jig and the oil distribution shaft can form an integral structure, the convenience and accuracy of the setting of the drill jig are ensured, the time for aligning and adjusting the drill jig and the oil distribution shaft is reduced, the scribing process of the oil distribution shaft can be completed only by one-time assembly, the assembly positioning efficiency of the drill jig and the oil distribution shaft is greatly improved, the processing cost of the oil distribution shaft is reduced, and the drill jig has better practical value and popularization prospect.

Drawings

FIG. 1 is a structural sectional view of a jig in an embodiment of the present invention;

FIG. 2 is a left side view of the structure of the jig in the embodiment of the present invention;

FIG. 3 is a front view of the structure of an oil distribution shaft in the embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line E-E of an oil distribution shaft in an embodiment of the present invention;

FIG. 5 is a right side view of the structure of the oil distribution shaft in the embodiment of the present invention;

in all the figures, the same reference numerals denote the same features, in particular:

1. drilling a mold; 101. an end face hole; 102. an internal thread; 103. a thread relief groove; 104. angular reference; 105. processing a positioning hole; 106. a set screw mounting hole;

2. an oil distribution shaft; 201. a small diameter end; 202. a large diameter end; 203. an external thread; 204. a radial oil hole; 205. and the axial oil hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example (b):

referring to fig. 1 and 2, a jig 1 according to a preferred embodiment of the present invention includes a body having a cap-type structure, wherein one side of the body is coaxially provided with an end surface hole 101, and an inner circumferential wall surface of the end surface hole 101 is provided with an internal thread 102, so that the jig 1 can be connected to an end portion of an oil distribution shaft 2 to be processed in a thread matching manner.

In a preferred embodiment, the oil distribution shaft 2 to be processed is as shown in fig. 3 to 5, and includes a small diameter end 201 and a large diameter end 202 which are coaxially arranged, and a mounting counterbore for matching a hydraulic motor is provided on an end surface of the large diameter end 202. Accordingly, it is necessary to provide an axial oil hole 205 extending in the axial direction between both end surfaces of the oil distribution shaft 2, and provide a plurality of radial oil holes 204 communicating with the corresponding axial oil hole 205 on the outer periphery of the small diameter end 201.

In order to match the drill jig 1 with the oil distribution shaft 2, an external thread 203 is annularly arranged on the outer periphery of the end part of the small-diameter end 201, which is far away from the large-diameter end 202, and is used for matching with the thread of the internal thread 102 of the drill jig 1. Obviously, in practical use, the oil distribution shaft 2 which is matched by the drill jig 1 in the preferred embodiment needs to be provided with an external thread 203 at the end of the small diameter end 201. For the oil distribution shaft 2 with the external thread 203 arranged at the end part of the small-diameter end 201, the drill jig 1 can be directly used, for the oil distribution shaft 2 with the external thread 203 which cannot be arranged at the periphery of the small-diameter end 201, a matching section with a certain length can be reserved at the end part of the small-diameter end 201 before drilling processing, the matching section is used as a processing allowance, the external thread 203 is correspondingly arranged at the periphery of the matching section, and after the oil distribution shaft 2 is drilled, the processing allowance is cut off.

It can be understood that the jig 1 in the preferred embodiment can meet the requirements of machining different types of oil distribution shafts 2, and when the outer diameter of the small-diameter end 201 is different, the jig 1 with the corresponding end surface hole 101 size can be replaced correspondingly.

More specifically, in the preferred embodiment, a thread relief groove 103 is circumferentially formed on the inner peripheral wall surface of the bottom of the end surface hole 101, and preferably has an axial length of 3mm to 5mm, and communicates with the bottom surface of the end surface hole 101. Correspondingly, the inner diameter of the thread relief groove 103 is not smaller than the outer diameter of the end part of the small-diameter end 201, so that when the drill jig 1 is coaxially matched with the small-diameter end 201, the end surface of the small-diameter end 201 can abut against the bottom surface of the end surface hole 101, and the matching accuracy of the two is ensured.

Meanwhile, in order to realize the reliability of the drill jig 1 after being matched with the oil distribution shaft 2 and avoid the drill jig 1 from rotating or shaking relative to the small-diameter end 201 when in use, at least one fastening screw mounting hole 106 penetrating through the end surface hole 101 is axially formed in the end surface of the outer side of the drill jig 1 and used for mounting a fastening screw, so that when the drill jig 1 is matched with the oil distribution shaft 2, the end part of the fastening screw can be abutted and pressed on the end surface of the small-diameter end 201, and the reliability of the setting of the drill jig 1 is ensured.

Obviously, the to-be-machined oil hole corresponding to the oil distribution shaft 2, specifically, the to-be-machined axial oil hole 205, needs to be provided with a plurality of machining positioning holes 105 on the outer end surface of the drill jig 1, as shown in fig. 2, for positioning when a plurality of threaded connection holes are machined on the end surface of the axial oil hole 205 and/or the small diameter end 201. For example, in the oil distribution shaft 2 shown in fig. 5, four axial oil holes 205 and four positioning and mounting screw holes are drilled in the axial direction on the end surface of the small-diameter end 201; correspondingly, eight machining positioning holes 105 communicated with the end face holes 101 are formed in the end face of the drill jig 1.

Preferably, a drill bushing can be correspondingly installed in the machining positioning hole 105 in the preferred embodiment, and further, surface hardening treatment such as nitriding and the like can be preferably performed on the whole drill jig 1, so that the service life of the drill jig 1 is prolonged, and the positioning accuracy of the machining positioning hole 105 during drilling is ensured. In actual installation, the material of the jig 1 is preferably the same as that of the oil distribution shaft 2.

Further, at least one angular reference 104 is disposed on the outer peripheral wall surface of the jig 1, and is preferably set by scribing, milling or disposing a boss plane, and the angular reference 104 may be disposed on the outer side end surface of the jig 1 or the outer peripheral wall surface of the jig 1, for example, in a preferred embodiment, angular reference lines are disposed on the outer side end surface and the outer peripheral wall surface at the same time, as shown in fig. 1 and 2.

The corresponding arrangement of the angular reference 104 can be used for positioning the opening of the corresponding radial oil hole 204 after the axial oil hole 205 is opened, so that the radial oil hole 204 can be accurately communicated with the corresponding axial oil hole 205. In a specific operation, the machining of the radial oil hole 204 needs to be realized by means of matching work of the index head, and the radial oil hole 204 is accurately positioned by accurately marking a line on the outer peripheral wall surface of the small-diameter end 201 along the axial direction, and then the subsequent machining of the radial oil hole 204 is completed on the basis.

More specifically, in the preferred embodiment, the scribing method for positioning the excircle feature of the oil distribution shaft 2 by using the drill jig 1 comprises the following steps:

(1) the drilling jig 1 is matched on a small-diameter end 201 of an oil distribution shaft 2 entering a clamping procedure, and processes such as drawing of positioning lines of holes on the end face of the oil distribution shaft 2 and keyways/oil holes on the periphery, machining of holes on the periphery and the like are prepared, and at the moment, a sealing groove, an end face sunken platform and part of an outer circular surface of the oil distribution shaft 2 are machined in place (a small amount of grinding is left on the part of the outer circular surface).

(2) Connecting the drill jig 1 with the small-diameter end 201 through matching of the internal thread 102 and the external thread 203, so that the end face of the small-diameter end 201 abuts against the bottom face of the end face hole 101; and then, the set screw is installed in the set screw installation hole 106, so that the end part of the set screw abuts against the end surface of the small-diameter end 201, the drill jig 1 is ensured to be firmly installed, and no shake exists between the drill jig 1 and the oil distribution shaft 2.

(3) And (3) assembling the drill jig 1 and the oil distribution shaft 2 which are matched with each other with the dividing head, clamping the periphery of the large-diameter end 202 of the oil distribution shaft 2, adjusting the height gauge until the height of the height gauge is equal to the center of the dividing head, and further locking the height gauge.

(4) And (3) rotating the index head until the angular reference 104 on the drill jig 1 is superposed with the sharp point of the height gauge so as to complete the determination of the angular reference of the oil distribution shaft 2, and then locking the index head.

(5) Identifying the characteristics of each excircle on the angular reference line of the oil distribution shaft 2, moving a height gauge on a scribing platform, and scribing along the axial direction on the periphery of the oil distribution shaft 2 to finish the determination of the corresponding key slot/hole angular line;

(6) and scribing a non-angular line. And (3) loosening the indexing head, rotating the indexing head by a corresponding angle relative to the angular reference 104, adjusting the corresponding position on the outer periphery of the oil distribution shaft 2 to the position of the original angular reference, locking the indexing head, completing scribing an angular line (axially extending scribing) on the outer periphery according to the operation in the step (5), and determining the opening position of a corresponding hole/groove on the angular line.

(7) And (3) marking corresponding to the axial position line (marked along the annular direction) of the processing characteristic on each angular line by matching with the determination of the axial dimension of each processing characteristic, wherein the intersection point of the axial position line and the angular line is the processing position corresponding to the excircle characteristic.

In actual operation, the axial position line can be scribed by a vernier caliper after the line is scribed, or the large-diameter end 202 is horizontally placed on a platform after the whole part is taken down from the dividing head, and then the line is scribed by the height gauge.

It will be appreciated that after the scribing of the features on the outer periphery of the small diameter end 201 is completed, the part may be removed from the index head and set on the drill, the holes on the end face of the small diameter end 201 are drilled according to the positioning of the machining positioning hole 105, and the machining of the features of the outer periphery is completed based on the positioning scribing on the outer periphery of the oil distribution shaft 2.

The drill jig disclosed by the utility model is simple in structure and easy and convenient to use, and can realize threaded connection on the end part of the oil distribution shaft to be processed, so that the drill jig and the oil distribution shaft can form an integral structure, the convenience and accuracy of the setting of the drill jig are ensured, the time for aligning and adjusting the drill jig and the oil distribution shaft is reduced, the scribing process of the oil distribution shaft can be completed only by one-time assembly, the assembly positioning efficiency of the drill jig and the oil distribution shaft is greatly improved, the processing cost of the oil distribution shaft is reduced, and the drill jig has a better practical value and a better popularization prospect.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the utility model, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The drill jig is characterized by comprising a body in a sleeve cover type structure;

the end face of the body, which is far away from the end face hole, is provided with a plurality of processing positioning holes communicated with the end face hole and at least one fastening screw mounting hole; the processing positioning hole is used for processing and positioning a corresponding hole on the end part to be processed; the fastening screw mounting hole is used for mounting a fastening screw when the drill jig is connected to the end part to be processed, so that the end part of the fastening screw abuts against the end surface of the end part to be processed;

2. The jig according to claim 1, wherein the shaft-like member is an oil distribution shaft, and a plurality of axial oil holes are formed between both end surfaces of the oil distribution shaft, and a plurality of radial oil holes are formed in an outer periphery of the oil distribution shaft.

3. The jig according to claim 1, wherein a thread relief groove having an inner diameter not smaller than an outer diameter of the end portion to be machined is formed in an annular direction on an inner peripheral wall surface of a bottom portion of the end surface hole.

4. The jig as claimed in claim 3, wherein the axial length of the thread relief groove is 3mm to 5 mm.

5. The jig according to any one of claims 1 to 4, wherein the angular reference is provided by at least one of scoring, milling a groove, providing a land plane.

6. The drill jig as claimed in any one of claims 1 to 4, wherein a drill bushing is installed in the machining positioning hole.

7. The jig as claimed in any one of claims 1 to 4, wherein the outer peripheral surface of the body is subjected to nitriding surface hardening treatment.

8. The jig according to any one of claims 1 to 4, wherein the jig is made of the same material as that of the shaft-like part.