CN219112926U

CN219112926U - Boring cutter and boring bar combined structure for boring pump cavity shaft hole of middle-opening pump

Info

Publication number: CN219112926U
Application number: CN202223359225.5U
Authority: CN
Inventors: 高晓; 朱佳恒; 鞠星辰
Original assignee: Jiangsu Yuchenxing Precision Technology Co ltd
Current assignee: Jiangsu Yuchenxing Precision Technology Co ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-06-02
Anticipated expiration: 2032-12-13

Abstract

A combined structure of a boring cutter and a boring rod for boring a pump cavity shaft hole of a pump, which belongs to the technical field of metal processing cutters. The boring machine comprises a boring bar and a boring cutter, and is characterized in that: the boring cutter boring bar detachable connecting mechanism is detachably connected with the left end face of the boring bar, and the boring cutter is arranged on the right side of the front end of the boring bar detachable connecting mechanism. The advantages are that: the boring bar can be inserted into the pump cavity of the middle-open pump from the left end shaft hole or the right end shaft hole of the middle-open pump and is inserted into the position of the pump cavity shaft hole in the use state, the boring tool is introduced into the pump cavity from the right end shaft hole or the left end shaft hole of the middle-open pump and is assembled or disassembled with the boring bar, so that the requirements of combining or separating the boring tool and the boring bar in the pump cavity, ensuring the accuracy and the reliability in the combined state and ensuring the convenience in the separation process can be met, and the conventional numerical control machining center is adapted to the process requirement of boring the pump cavity shaft hole by the boring tool.

Description

Boring cutter and boring bar combined structure for boring pump cavity shaft hole of middle-opening pump

Technical Field

The utility model belongs to the technical field of metal processing cutters, and particularly relates to a boring cutter and boring bar combined structure for a pump cavity shaft hole of a pump in boring processing.

Background

As known in the art, the aforementioned split pump is one of centrifugal pumps, and is called a split circulation pump, namely a single-stage double-suction centrifugal pump. The split pump is a universal mechanical device with wide range and large quantity, and is widely applied to the fields of petrochemical industry, electric metallurgy, mines, shipbuilding, light industry, agriculture, water conservancy, civil use such as urban water supply, fire protection, national defense and the like.

The split pump has the extreme advantage of large medium flow, the impeller is arranged in the pump shell, namely the pump cavity, and is fixed on the pump shaft, and the pump shaft is directly driven by the motor. Technical information related to the split pump is visible in the published chinese patent literature, such as CN208831335U recommended "a split pump", CN210484074U introduced "split two-stage pump", and CN106762677a published "multi-stage split pump", etc.

As is also known in the art, the diameters of the middle two holes of the split pump, namely the two pump cavity shaft holes in the middle, are larger than the diameters of the two outer side shaft holes corresponding to the two pump cavity shaft holes, and the two pump cavity shaft holes in the middle are often stepped, and the traditional machining mode is to carry out boring machining by means of a boring machine, specifically: the boring bar extends into the pump cavity from the shaft hole at the outer side, and then a boring cutter is installed, and the boring cutter is gradually fed by utilizing the function of an eccentric disc of the boring machine so as to achieve the expected machining precision.

As is known in the art, numerical control machining centers offer significant advantages in terms of machining speed and machining accuracy of workpieces over conventional boring equipment such as boring machines. In theory, the purpose of the machining precision can be achieved by boring the pump cavity shaft hole of the centering pump by adopting a numerical control machining center. However, due to the characteristic of the split pump structure, if the boring requirement on the pump cavity shaft hole is met, a horizontal numerical control machining center is needed to act, however, the prior art is just blank, that is, the prior art does not have the boring of the pump cavity shaft hole of the split pump. In particular: if a special horizontal numerical control machining center is manufactured or equipped for the purpose of boring the pump cavity shaft hole of the centering pump, the manufacturing of common mechanical products and parts thereof is almost impossible, namely, impossible, to achieve. Based on the foregoing factors, the boring tool and boring bar combined structure for boring the pump cavity shaft hole of the centering pump in the numerical control machining center, which is designed to meet the existing economic and relatively low cost, wide in application and easy in operation, has good positive significance, and the technical scheme to be described below is generated in the background.

Disclosure of Invention

The utility model aims to provide a combined structure of a boring cutter and a boring rod, which is beneficial to combining or separating the boring cutter and the boring rod in a pump cavity, can ensure the accuracy and the reliability in a combined state and the convenience in separation, and can meet the boring processing requirement of a boring cutter on a pump cavity shaft hole in a conventional numerical control processing center.

The boring tool is characterized by also comprising a boring tool boring bar detachable connecting mechanism, wherein the boring tool boring bar detachable connecting mechanism is detachably connected with the left end face of the boring bar, and the boring tool is arranged on the right side of the front end of the boring tool boring bar detachable connecting mechanism.

In a specific embodiment of the utility model, a boring cutter arm center positioning column protruding from the right end face of the boring bar and a pair of boring cutter arm limiting blocks fixed on the right end face of the boring bar and positioned at the edge of the right end face are formed at the center of the right end face of the boring bar, the pair of boring cutter arm limiting blocks are respectively separated by 180 degrees around the circumferential direction of the right end face of the boring bar to form a face-to-face position relationship, and the middle part of the boring cutter boring bar detachable connection mechanism is fixed with the boring cutter arm center positioning column and the pair of boring cutter arm limiting blocks and is also fixed with the right end face of the boring bar.

In another specific embodiment of the present utility model, a cutter bar driving connection slot and a cutter bar driving connection seat are sequentially formed at the left end of the boring bar from right to left.

In another specific embodiment of the utility model, a positioning cushion sleeve fixing screw hole is formed in the center of the boring cutter arm center positioning column; the boring cutter boring bar dismounting type connecting mechanism comprises a boring cutter arm and a boring cutter limiting pressing plate, wherein a boring cutter arm center positioning column matching hole is formed in the middle of the boring cutter arm in the length direction, the boring cutter arm center positioning column is inserted into the boring cutter arm center positioning column matching hole, a pair of boring cutter arm limiting block matching concave cavities are formed in the positions corresponding to the pair of boring cutter arm limiting blocks on the left side surface of the middle of the boring cutter arm in the length direction, the pair of boring cutter arm limiting blocks are embedded into the boring cutter arm limiting block matching concave cavities, a positioning pad sleeve hole with the diameter larger than that of the boring cutter arm center positioning column matching hole and concentric with the center of the boring cutter arm center positioning column matching hole is formed in the position corresponding to the right side of the boring cutter arm center positioning column matching hole, a positioning pad sleeve fixing screw is embedded in the positioning pad sleeve matching hole, a positioning pad sleeve fixing screw is arranged on the positioning pad sleeve, a boring cutter accommodating groove is formed in the right side of the boring cutter arm, the boring cutter accommodating groove is formed in the boring cutter head accommodating groove, and the boring cutter head is fixed to the boring cutter head is in the boring cutter head.

In still another specific embodiment of the present utility model, a pair of boring arm stopper limiting cavities are formed on the right end face of the boring bar at positions corresponding to the pair of boring arm stoppers, and a pair of boring arm stoppers are fitted with the pair of boring arm stopper limiting cavities and each are fixed by boring arm stopper fixing screws.

In a further specific embodiment of the present utility model, a set of boring tool arm middle set screw holes are provided on and circumferentially around the right end face of the boring bar at equidistant intervals; and a group of milling cutter arm middle fixing screw holes are formed in the middle of the boring cutter arm around the circumferential direction of the locating pad sleeve hole and in the position corresponding to the boring cutter arm middle fixing screw holes in an equidistant state, a milling cutter arm middle fixing screw is respectively arranged on the milling cutter arm middle fixing screw holes, and the milling cutter arm middle fixing screw is screwed into the boring cutter arm middle fixing screw holes.

In a further specific embodiment of the utility model, a set of boring tool locking screw holes are provided at the front end of the boring tool arm and spaced apart on the boring tool receiving cavity bottom wall located in the boring tool receiving cavity, and a boring tool locking screw is provided below the boring tool receiving cavity bottom wall and at positions corresponding to the set of boring tool locking screw holes, and the boring tool locking screw is screwed into the boring tool receiving cavity bottom wall from below and up to lock the bottom surface of the boring tool.

In a further specific embodiment of the utility model, a boring cutter limit platen set screw hole is provided on the right side of the front end of the boring cutter arm and at a location corresponding to the boring cutter limit platen, the boring cutter limit platen being secured to the right side of the front end of the boring cutter arm by a boring cutter limit platen set screw at a location corresponding to the boring cutter limit platen set screw hole.

In yet another specific embodiment of the present utility model, a shim adjusting screw is provided on the rear end wall body corresponding to the boring tool receiving groove, and a shim adjusting screw operation relief cavity is provided at the rear end of the boring tool receiving groove and at a position corresponding to the rear portion of the shim adjusting screw.

In still another specific embodiment of the present utility model, a pair of pressing screws corresponding to each other in front and rear positions are disposed at the middle part of the boring tool limiting pressing plate in the height direction, and the pair of pressing screws are closely attached to the right side surface of the boring tool.

The technical scheme provided by the utility model has the technical effects that: the boring bar can be inserted into the pump cavity of the middle-open pump from the left end shaft hole or the right end shaft hole of the middle-open pump and is inserted into the position of the pump cavity shaft hole in the use state, the boring tool is introduced into the pump cavity from the right end shaft hole or the left end shaft hole of the middle-open pump and is assembled or disassembled with the boring bar, so that the requirements of combining or separating the boring tool and the boring bar in the pump cavity, ensuring the accuracy and the reliability in the combined state and ensuring the convenience in the separation process can be met, and the conventional numerical control machining center is adapted to the process requirement of boring the pump cavity shaft hole by the boring tool.

Drawings

Fig. 1 is a structural view of a first embodiment of the present utility model.

Fig. 2 is a schematic illustration of an application of the present utility model.

Fig. 3 is a schematic diagram of a second embodiment of the present utility model.

Detailed Description

In order to make the technical spirit and advantages of the present utility model more clearly understood, the applicant will now make a detailed description by way of example, but the description of the examples is not intended to limit the scope of the utility model, and any equivalent transformation made merely in form, not essentially, according to the inventive concept should be regarded as the scope of the technical solution of the present utility model.

In the following description, all concepts related to the directions or azimuths of up, down, left, right, front and rear are based on the position state of fig. 1, and thus should not be construed as a specific limitation on the technical solution provided by the present utility model.

Example 1:

referring to fig. 1, a boring bar 1 and a boring tool 2 are shown, which are technical points of the technical scheme provided by the utility model: the boring tool and boring bar combined structure system for opening the pump cavity shaft hole of the pump in the boring process further comprises a boring tool boring bar detachable connecting mechanism 3, wherein the boring tool boring bar detachable connecting mechanism 3 is detachably connected with the left end face of the boring bar 1, and the boring tool 2 is arranged on the right side (also called as the right front end) of the front end of the boring tool boring bar detachable connecting mechanism 3.

The center of the right end face of the boring bar 1 is provided with a boring tool arm center positioning column 11 protruding from the right end face of the boring bar 1, and a pair of boring tool arm limiting blocks 12 are fixed on the right end face of the boring bar 1 and positioned at the edge of the right end face, the boring tool arm limiting blocks 12 are respectively spaced 180 degrees around the circumferential direction of the right end face of the boring bar 1 to form a face-to-face position relationship, namely a corresponding relationship, and the middle part of the boring tool boring bar detachable connecting mechanism 3 is fixed with the boring tool arm center positioning column 11 and the boring tool arm limiting blocks 12 and is also fixed with the right end face of the boring bar 1.

With continued reference to fig. 1, a cutter bar driving connection slot 13 and a cutter bar driving connection seat 14 are sequentially formed at the left end of the boring bar 1 from right to left. As can be seen from the above description of the cutter bar driving connection slot 13 and the cutter bar driving connection seat 14, the boring bar driving mechanism for driving the boring bar 1 to move is connected with the motor as described above, and the boring bar driving mechanism is connected with the left end of the boring bar 1 and the principle of moving the boring bar 1 is a known technology, so the applicant will not explain the boring bar driving mechanism.

A positioning cushion sleeve fixing screw hole 111 is formed in the center of the boring cutter arm center positioning column 11; the boring tool boring bar detachable connection mechanism 3 includes a boring tool arm 31 and a boring tool limiting pressing plate 32, a boring tool arm center positioning post fitting hole 311 is formed in the middle of the boring tool arm 31 in the length direction, the boring tool arm center positioning post 11 is inserted into the boring tool arm center positioning post fitting hole 311, a pair of boring tool arm limiting block fitting concave holes 312 are formed on the left side surface of the middle of the boring tool arm 31 in the length direction and at positions corresponding to the pair of boring tool arm limiting blocks 12, the pair of boring tool arm limiting blocks 12 are inserted into the boring tool arm limiting block fitting concave holes 312, a positioning pad sleeve hole 3111 having a diameter larger than the boring tool arm center positioning post fitting hole 311 and concentric with the center of the boring tool arm center positioning post fitting hole 311 is formed at a position corresponding to the right side of the boring tool arm center positioning post fitting hole 311, a positioning sleeve 3112 is inserted into the positioning sleeve hole 3111, a positioning sleeve fixing screw 31121 is disposed on the positioning sleeve 3112, the positioning sleeve fixing screw 31121 is screwed into the positioning sleeve fixing screw hole 111, a boring tool receiving groove 313 is formed on the right side of the front end of the boring tool arm 31, the boring tool 2 is received and fixed in the boring tool receiving groove 313, the front end of the boring tool 2 extends to the front side of the boring tool receiving groove 313 and a boring tool bit 21 is fixed by the boring tool fixing screw 211, the boring tool limiting pressing plate 32 is fixed to the right side of the front end of the boring tool arm 31 at a position corresponding to the middle of the right side of the boring tool 2, and the rear end of the boring tool arm 31 is identical to the length of the front end and is formed as a balance arm 314.

With continued reference to fig. 1, a pair of boring arm stopper limiting cavities 15 are formed on the right end surface of the boring bar 1 at positions corresponding to the pair of boring arm stoppers 12, and the pair of boring arm stoppers 12 are engaged with the pair of boring arm stopper limiting cavities 15 and are respectively fixed by boring arm stopper fixing screws 121.

Continuing to refer to fig. 1, a set of boring tool arm middle set screw holes 16 are provided on and circumferentially around the right end face of the boring bar 1 at equidistant intervals; a set of milling arm middle fixing screw holes 315 are also formed in the middle part of the boring cutter arm 31 around the circumferential direction of the positioning pad sleeve hole 3111 and at positions corresponding to the boring cutter arm middle fixing screw holes 16 in an equidistantly spaced state, and a milling arm middle fixing screw 3151 is respectively provided on the set of milling arm middle fixing screw holes 315, and the milling arm middle fixing screw 3151 is screwed into the boring cutter arm middle fixing screw hole 16.

A set of boring tool locking screw holes 3131 are provided at the front end of the boring tool arm 31 at intervals on the boring tool receiving cavity bottom wall located in the boring tool receiving cavity 313, and a boring tool locking screw 31311 is provided below the boring tool receiving cavity bottom wall and at positions corresponding to the set of boring tool locking screw holes 3131, and the boring tool locking screw 31311 is screwed into the boring tool receiving cavity 313 from below the boring tool receiving cavity bottom wall to lock the bottom surface of the boring tool 2.

A boring cutter limiting platen set screw hole 316 is formed in the right surface of the front end of the boring cutter arm 31 at a position corresponding to the boring cutter limiting platen 32, and the boring cutter limiting platen 32 is fixed to the right surface of the front end of the boring cutter arm 31 at a position corresponding to the boring cutter limiting platen set screw hole 316 by a boring cutter limiting platen set screw 321.

A shim adjusting screw 3132 is disposed on the rear end wall body corresponding to the boring tool receiving groove 313, and a shim adjusting screw operation relief chamber 3133 is formed at the rear end of the boring tool receiving groove 313 and at a position corresponding to the rear portion of the shim adjusting screw 3132.

A pair of pressing screws 322 corresponding to each other in front and rear positions are disposed at the middle part of the boring cutter limit pressing plate 32 in the height direction, and the pair of pressing screws 322 is closely attached to the right side surface of the boring cutter 2.

Referring to fig. 2, there is shown in fig. 2 a split pump which belongs to the field of the known art and is widely used, the split pump comprising a split pump body 4 formed by a upper pump body 41 and a lower pump body 42, and also shown are a left end shaft hole 43a at the left end of the split pump body 4, a right end shaft hole 43b at the right end, two pump chamber shaft holes 45 located in a pump chamber 44, a medium introduction port 46a located on the front side of the middle of the split pump body 4 and communicating with the pump chamber 44, and a medium introduction port 46b located on the rear side of the middle of the split pump body 4 and also communicating with the pump chamber 44.

When the split pump body 4 of the structure shown in fig. 2 is to be used in a numerical control machining center to bore the pump cavity shaft hole 45, an on-line operator inserts the boring bar 1 into the pump cavity from the left end shaft hole 43a, and the left end of the boring bar 1 reaches the position of the pump cavity shaft hole 45, and another on-line operator introduces the boring tool arm 31 of the structural system of the boring bar detachable connecting mechanism 3 of the boring tool 2 fixed in advance into the pump cavity 44 by means of the right end shaft hole 43b, and installs the boring tool arm on the right end of the boring bar 1. The method specifically comprises the following steps: the boring cutter arm center positioning column fitting hole 311 is fitted with the boring cutter arm center positioning column 11 while the pair of boring cutter arm stopper fitting cavities 312 are fitted with the pair of boring cutter arm stoppers 12 in a mortise-and-tenon effect, the positioning pad sleeve 3112 is put into the positioning pad sleeve hole 3111, and the positioning pad sleeve fixing screw 31121 is screwed into the positioning pad sleeve fixing screw hole 111 and the set of milling cutter arm middle fixing screws 3151 is screwed into the boring cutter arm middle fixing screw hole 16, thereby completing the installation of the boring cutter arm 31 together with the boring cutter 2 and the right end face of the boring rod 1. The boring bar 1 and the boring tool arm 31 are rotated by the left end of the boring bar driven by a power device of the machining center, and the boring tool arm 31 and the boring tool 2 fixed with the boring tool head 21 are rotated to realize boring of the pump cavity shaft hole 45 shown in fig. 2. When one of the two pump chamber shaft holes 45 at the left end of the position shown in fig. 2 is finished, the boring bar arm 31 is separated (detached) from the boring bar 1 by means of the right end shaft hole 43b in the reverse manner as described above, the boring bar 1 is first inserted from the right end shaft hole 43b in the same manner as described above, and then the boring bar arm 31, on which the boring bar 2 has been previously mounted, is introduced from the left end shaft hole 43a into the pump chamber 44 to be mounted on the boring bar 1 in accordance with the above, whereby boring can be performed on the other pump chamber shaft hole 45.

The process of installing the cutter bar 2 on the boring cutter arm 31 is as follows: the boring tool 2 is inserted into the boring tool accommodating groove 313, the boring tool limiting pressing plate 32 is screwed into the boring tool limiting pressing plate fixing screw holes 316 through a group of boring tool limiting pressing plate fixing screws 321 to be fixed on the right side of the front end of the boring tool 1, the pressing tool screw 322 is screwed into the pressing tool screw holes 323 preset on the boring tool limiting pressing plate 32 to lock the right side surface of the boring tool 2, and the boring tool locking screw 31311 is screwed into or called into the boring tool accommodating groove 313 through the boring tool locking screw holes 3131 to lock the lower surface of the boring tool 2. When the boring tool 2 and the boring tool bit 21 are to be finely adjusted as required, the boring tool adjusting screw 3132 is first adjusted by a tool at a position corresponding to the boring tool adjusting screw operation relief cavity 3133 so as to meet the requirement of the boring tool bit penetrating process of the boring tool receiving groove 313. The boring cutter limit pressing plate 32 is mounted after the adjustment operation is completed, and the boring cutter locking screw 31311 is fixed.

Example 2:

referring to fig. 3, as another embodiment, fig. 3 shows that the right end of the boring bar 1 is matched with the boring bar by using a mounting seat 17, specifically, the mounting seat 17 is screwed into a mounting seat matching post screw hole 1711 also preset on a mounting seat matching post 171 of the mounting seat 17 by using a mounting seat matching post fixing screw 172 through a boring bar screw hole 18 preset on the boring bar 1. With this structure, a cavity for the insertion of the mounting seat mating post 171 is formed at the center of the right end of the boring bar 1, so that the boring bar 1 and the mounting seat 17 are in a split type assembly structure, and the boring tool arm center positioning post 11 and the pair of boring tool arm limiting blocks 12 are transferred to the right end surface of the mounting seat 17. The remainder is the same as described for example 1. The applicant needs to say that: this structure of embodiment 2 does not substantially depart from the structure of embodiment 1, that is, even if the structure of embodiment 2 is employed, it should be regarded as the structure system of embodiment 1 of the present utility model. In addition, the part (i.e., the region) of the boring bar 1 having the bar driving connection seat 14 and the bar driving connection slot 13 at the left end thereof and the boring bar 1 may be formed as a split assembly structure, and even so, the present disclosure should be considered as a technical scope of the present disclosure.

In summary, the technical scheme provided by the utility model overcomes the defects in the prior art, successfully completes the task of the utility model, and faithfully honors the technical effects carried by the applicant in the technical effect column above.

Claims

1. The combined structure of the boring cutter and the boring rod for the pump cavity shaft hole of the pump in boring processing comprises a boring rod (1) and the boring cutter (2) and is characterized by further comprising a boring cutter boring rod detachable connecting mechanism (3), wherein the boring cutter boring rod detachable connecting mechanism (3) is detachably connected with the left end face of the boring rod (1), and the boring cutter (2) is arranged on the right side of the front end of the boring cutter boring rod detachable connecting mechanism (3).

2. The boring tool and boring bar combined structure for opening a pump cavity shaft hole of a pump in boring processing according to claim 1, characterized in that a boring tool arm center positioning column (11) protruding from the right end face of the boring bar (1) and a pair of boring tool arm limiting blocks (12) are formed at the center position of the right end face of the boring bar (1), and are fixed on the right end face of the boring bar (1) and at the edge part of the right end face, the pair of boring tool arm limiting blocks (12) are respectively separated by 180 degrees around the circumferential direction of the right end face of the boring bar (1) to form a face-to-face position relationship, and the middle part of the boring tool bar detachable connecting mechanism (3) is fixed with the boring tool arm center positioning column (11) and the pair of boring tool arm limiting blocks (12) and is also fixed with the right end face of the boring bar (1).

3. The boring tool and boring bar combined structure for opening a pump cavity shaft hole of a pump in boring processing according to claim 1 or 2, characterized in that a tool bar driving connection clamping groove (13) and a tool bar driving connection seat (14) are sequentially formed at the left end of the boring bar (1) from right to left.

4. The boring cutter and boring bar combined structure for boring a pump cavity shaft hole of a pump in boring processing according to claim 2, characterized in that a positioning cushion sleeve fixing screw hole (111) is arranged at the central position of the boring cutter arm central positioning column (11); the boring tool boring bar detachable connection mechanism (3) comprises a boring tool arm (31) and a boring tool limiting pressing plate (32), a boring tool arm center positioning column matching hole (311) is formed in the middle of the boring tool arm (31) in the length direction, the boring tool arm center positioning column (11) is inserted into the boring tool arm center positioning column matching hole (311), a pair of boring tool arm limiting block matching concave cavities (312) are formed on the left side surface of the middle of the boring tool arm (31) in the position corresponding to the pair of boring tool arm limiting blocks (12), the pair of boring tool arm limiting blocks (12) are embedded into the boring tool arm limiting block matching concave cavities (312), a positioning sleeve hole (3111) with the diameter larger than that of the boring tool arm center positioning column matching hole (311) and concentric with the center of the boring tool arm center positioning column matching hole (311) is formed at the right position corresponding to the boring tool arm center positioning column matching hole (311), a positioning sleeve (2) is embedded in the positioning sleeve (3111) in the left side surface of the middle of the boring tool arm (31), the positioning sleeve (3112) is screwed into the positioning sleeve (21) at the right side of the boring tool receiving hole (313), the positioning sleeve (313) is screwed into the positioning sleeve (21) at the right side of the boring tool receiving hole (313), the front end of the boring cutter (2) extends to the front side of the boring cutter accommodating groove (313) and is fixedly provided with a boring cutter head (21), a boring cutter limiting pressing plate (32) is fixed with the right side of the front end of the boring cutter arm (31) at a position corresponding to the middle of the right side of the boring cutter (2), and the rear end of the boring cutter arm (31) is formed into a balance arm (314).

5. The boring tool and boring bar combination for boring a pump chamber shaft hole of a pump in a boring process according to claim 4, wherein a pair of boring tool arm stopper limiting cavities (15) are formed on the right end face of the boring bar (1) at positions corresponding to the pair of boring tool arm stoppers (12), and the pair of boring tool arm stoppers (12) are fitted with the pair of boring tool arm stopper limiting cavities (15) and are fixed by boring tool arm stopper fixing screws (121).

6. The boring tool and boring bar combination structure for boring a pump chamber shaft hole of a pump in boring machining according to claim 4, characterized in that a group of boring tool arm middle fixing screw holes (16) are provided on the right end face of the boring bar (1) and around the circumference direction of the right end face in an equidistantly spaced state; a group of milling arm middle fixing screw holes (315) are formed in the middle of the boring cutter arm (31) around the circumferential direction of the positioning pad sleeve hole (3111) and at positions corresponding to the boring cutter arm middle fixing screw holes (16) in an equidistant state, a milling arm middle fixing screw (3151) is respectively arranged on the group of milling arm middle fixing screw holes (315), and the milling arm middle fixing screw (3151) is screwed into the boring cutter arm middle fixing screw holes (16).

7. The boring tool and boring bar combination for a pump chamber shaft hole of a pump in boring according to claim 4, characterized in that a set of boring tool locking screw holes (3131) are provided at a front end of the boring tool arm (31) and on a boring tool receiving chamber bottom wall located in the boring tool receiving chamber (313) at intervals, a boring tool locking screw (31311) is provided below the boring tool receiving chamber bottom wall and at positions corresponding to the set of boring tool locking screw holes (3131), and the boring tool locking screw (31311) is screwed into the boring tool receiving chamber (313) from below the boring tool receiving chamber bottom wall to lock a bottom surface of the boring tool (2).

8. The boring tool and boring bar combination structure for a pump chamber shaft hole of a pump in boring according to claim 4, characterized in that a boring tool limit pressing plate fixing screw hole (316) is formed in a right side surface of the front end of the boring tool arm (31) and in a position corresponding to the boring tool limit pressing plate (32), and the boring tool limit pressing plate (32) is fixed with the right side surface of the front end of the boring tool arm (31) in a position corresponding to the boring tool limit pressing plate fixing screw hole (316) by a boring tool limit pressing plate fixing screw (321).

9. The boring tool and boring bar combination structure for boring a pump chamber shaft hole of a pump in a boring process according to claim 4, wherein a shim adjusting screw (3132) is provided on a rear end wall body corresponding to the boring tool receiving groove (313), and a shim adjusting screw operation relief chamber (3133) is provided at a rear end of the boring tool receiving groove (313) and at a position corresponding to a rear portion of the shim adjusting screw (3132).

10. The boring tool and boring bar combined structure for boring a pump chamber shaft hole of a pump in boring according to claim 4, wherein a pair of pressing screws (322) corresponding to each other in front and rear positions are disposed at the middle part of the boring tool limit pressing plate (32) in the height direction, and the pressing screws (322) are closely attached to the right side surface of the boring tool (2).