A clamping fixture for machining the inlet end face of a pump casing

Abstract

This utility model discloses a clamping fixture for machining the inlet end face of a pump casing, including a bottom fixing plate. A bottom horizontal support plate is fixed to the center of the top surface of the bottom fixing plate by bolts. A centrally extending central positioning post is fixed or formed in the center of the top surface of the bottom horizontal support plate. The bottom end face of the pump casing to be machined presses against the top surface of the bottom horizontal support plate. The central positioning post is inserted into the central through hole in the center of the bottom plate of the pump casing, and the outer side wall of the central positioning post is in close contact with the inner side wall of the central through hole. Vertical support posts are fixed to the left and right front and rear parts of the top surface of the bottom fixing plate. It is suitable for the installation and disassembly of pump casings of the same specification and size in large batches. It does not require disassembly bolts, making it easy to install and disassemble and greatly improving processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water pump processing equipment technology, and more specifically to a clamping fixture for machining the end face of the pump casing inlet. Background Technology

[0002] In existing chemical pumps, the pump casing is generally volute-shaped and is usually made by casting.

[0003] After the pump casing is cast, all its connecting end faces need to be machined to ensure that its flatness meets the requirements of subsequent installation.

[0004] The flange face at the discharge end needs to be machined. Before machining, it needs to be clamped and fixed. The existing clamping method is to fix multiple clamping blocks to the mounting base plate of the pump casing with bolts, clamp the pump casing on all the clamping blocks, and then perform machining. The disassembly and assembly of all the clamping blocks is troublesome. Each time it is clamped, some clamping blocks need to be disassembled. Then, when a new pump casing is installed, it needs to be reinstalled. It is inefficient and requires a lot of manual labor.

[0005] In particular, for large quantities of pump casings of the same model and size, the efficiency is very low because some clamping blocks still need to be disassembled and installed each time. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a clamping fixture for machining the inlet end face of a pump casing. It is suitable for the installation and disassembly of a large batch of pump casings of the same specifications and size. It does not require disassembly bolts, making it easy to install and disassemble and greatly improving processing efficiency.

[0007] The solution of this utility model to the aforementioned technical problem is:

[0008] A clamping fixture for machining the feed inlet end face of a pump casing includes a bottom fixing plate. A bottom horizontal support plate is fixed to the center of the top surface of the bottom fixing plate by bolts. An upwardly extending central positioning post is fixed or formed in the center of the top surface of the bottom horizontal support plate. The bottom end face of the pump casing to be machined is pressed against the top surface of the bottom horizontal support plate. The central positioning post is inserted into the central through hole in the center of the bottom plate of the pump casing. The outer side wall of the central positioning post is in close contact with the inner side wall of the central through hole.

[0009] Vertical support columns are fixed to the left and right front and rear parts of the top surface of the bottom fixing plate. The upper fixing plate is fixed to the top surface of all the vertical support columns. An upper clamping cylinder is fixed to the middle of the top surface of the upper fixing plate. The bottom end of the push rod of the upper clamping cylinder extends out of the bottom surface of the upper fixing plate and is fixed to the upper clamping plate. An upper positioning protrusion is fixed to the middle of the bottom surface of the upper clamping plate. The upper positioning protrusion is inserted into the middle main through hole of the top plate of the pump housing. The outer side wall of the upper positioning protrusion is in close contact with the inner side wall of the middle main through hole. The upper clamping plate presses against the top surface of the annular protrusion connecting part formed on the top surface of the top plate around the middle main through hole of the pump housing.

[0010] The top surfaces of the bottom horizontal support plates on the left and right sides of the central positioning column are formed with connecting screw holes. The screw part formed in the middle of the bottom surface of the lower positioning column is screwed into the corresponding connecting screw hole. The bottom surface of the lower positioning column presses against the top surface of the bottom horizontal support plate. The lower positioning column is inserted into the connecting through holes formed on the bottom plate on the left and right sides of the central through hole of the pump housing. The outer side wall of the lower positioning column is in close contact with the inner side wall of the corresponding connecting through hole.

[0011] The upper pressing plate has vertical through holes formed in the front and rear parts of the left and right sides. The guide sleeve is inserted into the corresponding vertical through hole, and the outer side wall of the guide sleeve is pressed against the inner side wall of the corresponding vertical through hole. The radial extension edge formed on the top outer side wall of the guide sleeve is above the upper pressing plate, and the bottom surface of the radial extension edge is pressed against the top surface of the upper pressing plate. The vertical support column is inserted into the corresponding guide sleeve, and the outer side wall of the vertical support column is in close contact with the inner side wall of the corresponding guide sleeve.

[0012] The bottom surface of the side limiting pressure plate is fixed with a bottom self-lubricating block, and the bottom surface of the bottom self-lubricating block is in close contact with the top surface of the bottom fixing plate.

[0013] The outstanding effect of this utility model is:

[0014] Compared with existing technologies, it is suitable for the installation and disassembly of pump casings of the same specifications and size in large quantities. It does not require disassembly bolts, making it easy to install and disassemble and greatly improving processing efficiency. Attached Figure Description

[0015] Figure 1 This is a partial top view of the present invention;

[0016] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0017] Figure 3 This is a partial top view of the bottom fixing plate of this utility model. Detailed Implementation

[0018] For example, see below. Figures 1 to 3As shown, a clamping fixture for machining the end face of a pump casing inlet includes a bottom fixing plate 10, which is fixed to the bed of a milling machine and can be fixed by bolts.

[0019] The bottom fixing plate 10 has a bottom horizontal support plate 20 fixed to the center of its top surface by bolts. The bottom horizontal support plate 20 has an upwardly extending central positioning post 21 fixed or formed in the center of its top surface. The outer side wall of the top of the central positioning post 21 is a conical wall. This structure facilitates the installation of the pump housing 100. The bottom horizontal support plate 20 can be replaced according to the processing needs of different pump housings 100. After removing all bolts, the bottom horizontal support plate 20 corresponding to the pump housing 100 to be processed can be replaced. At the same time, the bottom horizontal support plate 20 also needs to have an upwardly extending central positioning post 21 fixed or formed in the center of its top surface, corresponding to the central through hole of the bottom plate of the pump housing 100 to be processed.

[0020] The bottom end face of the pump casing 100 to be processed is pressed against the top surface of the bottom horizontal support plate 20, and the central positioning post 21 is inserted into the central through hole in the middle of the bottom plate of the pump casing 100, with the outer side wall of the central positioning post 21 in close contact with the inner side wall of the central through hole.

[0021] Vertical support columns 11 are fixed to the left and right front and rear parts of the top surface of the bottom fixing plate 10. An upper fixing plate 12 is fixed to the top surface of all the vertical support columns 11. An upper clamping cylinder 13 is fixed to the center of the top surface of the upper fixing plate 12. The bottom end of the push rod of the upper clamping cylinder 13 extends out of the bottom surface of the upper fixing plate 12 and is fixed to an upper clamping plate 14. An upper positioning protrusion 15 is fixed to the center of the bottom surface of the upper clamping plate 14 by bolts (which can...). The upper positioning protrusion 15 is disassembled and replaced as needed, and is fitted with an upper positioning protrusion 15 that mates with the central main through hole of the top plate of the pump housing 100 to be processed. The upper positioning protrusion 15 is inserted into the central main through hole of the top plate of the pump housing 100, and the outer side wall of the upper positioning protrusion 15 is in close contact with the inner side wall of the central main through hole. The upper clamping plate 14 presses against the top surface of the annular protruding connecting part 101 formed on the top surface of the top plate around the central main through hole of the pump housing 100. The bottom outer side wall of the upper positioning protrusion 15 is a conical wall surface to facilitate its insertion into the central main through hole of the top plate of the pump housing 100.

[0022] The upper positioning protrusion 15 also needs to be matched with the main through hole in the middle of the top plate of the pump casing 100 to be processed. Depending on the processing of pump casings 100 of different specifications and sizes, the upper positioning protrusion 15 needs to be installed.

[0023] Furthermore, the top surfaces of the bottom horizontal support plates 20 at the left and right sides of the central positioning post 21 are each formed with connecting screw holes 22. The screw portion formed in the middle of the bottom surface of the lower positioning post 23 is screwed into the corresponding connecting screw hole 22. The bottom surface of the lower positioning post 23 presses against the top surface of the bottom horizontal support plate 20. The lower positioning post 23 is inserted into the connecting through holes 102 formed on the bottom plate at the left and right sides of the central through hole of the pump housing 100. The outer side wall of the lower positioning post 23 is in close contact with the inner side wall of the corresponding connecting through hole 102. The positions of the lower positioning posts 23 installed on the bottom horizontal support plate 20 of each specification are evenly aligned with the connecting through holes 102 formed on the bottom plate at the left and right sides of the central through hole of the bottom plate of the pump housing 100 to be processed, so as to achieve positioning and clamping and improve the clamping effect.

[0024] Furthermore, the left and right front and rear parts of the upper pressing plate 14 are each formed with vertical through holes. The guide sleeve 1 is inserted into the corresponding vertical through hole, and the outer side wall of the guide sleeve 1 is pressed against the inner side wall of the corresponding vertical through hole. The radial extension edge formed on the top outer side wall of the guide sleeve 1 is above the upper pressing plate 14, and the bottom surface of the radial extension edge is pressed against the top surface of the upper pressing plate 14. The vertical support column 11 is inserted into the corresponding guide sleeve 1, and the outer side wall of the vertical support column 11 is in close contact with the inner side wall of the corresponding guide sleeve 1.

[0025] Furthermore, the end of the discharge pipe of the pump casing 100 extends out of the front of the bottom fixing plate 10.

[0026] Furthermore, a vertical plate 30 is fixed to the top surface of the bottom fixing plate 10 at the right side of the discharge pipe of the pump casing 100. A central threaded through hole extending to the left and right is formed in the middle of the vertical plate 30. The screw part of the adjusting bolt 31 is screwed into the central threaded through hole. The left end of the screw part of the adjusting bolt 31 extends out of the left side wall of the vertical plate 30 and is movably connected to the side limiting pressure plate 32. The left side wall of the side limiting pressure plate 32 presses against the right side wall of the discharge pipe of the pump casing 100.

[0027] Furthermore, the right end of the screw portion of the adjusting bolt 31 extends out of the vertical plate 30 and is formed with a rotating part. A locking nut 33 is screwed onto the screw portion of the adjusting bolt 31, and the locking nut 33 presses against the right side wall of the vertical plate 30.

[0028] Furthermore, a bottom self-lubricating block 34 is fixed to the bottom surface of the side limiting pressure plate 32, and the bottom surface of the bottom self-lubricating block 34 is in close contact with the top surface of the bottom fixing plate 10.

[0029] Furthermore, an anti-slip and wear-resistant block 35 is fixed on the left side wall of the side limiting pressure plate 32, and the left side wall of the anti-slip and wear-resistant block 35 presses against the right side wall of the discharge pipe of the pump casing 100.

[0030] It can be adjusted by loosening the locking nut 33 and rotating the adjusting bolt 31 to change the left and right positions of the side limit pressure plate 32, so as to ensure that the left side wall of the anti-slip wear-resistant block 35 is accurately pressed against the right side wall of the discharge pipe of the pump casing 100. After adjustment, tightening the locking nut 33 is very convenient.

[0031] In this embodiment, the bottom fixing plate 10 is fixed on the milling machine bed. The milling machine in this embodiment is an existing milling machine that can be purchased directly, and will not be described in detail here.

[0032] The pump casing 100 to be processed is placed on the top surface of the bottom horizontal support plate 20. The central positioning post 21 is inserted into the central through hole in the middle of the bottom plate of the pump casing 100, and the outer side wall of the central positioning post 21 is in close contact with the inner side wall of the central through hole. The lower positioning post 23 is inserted into the connecting through holes 102 formed on the bottom plate on the left and right sides of the central through hole of the pump casing 100, and the outer side wall of the lower positioning post 23 is in close contact with the inner side wall of the corresponding connecting through hole 102. At the same time, the left side wall of the anti-slip wear-resistant block 35 presses against the right side wall of the discharge pipe of the pump casing 100. To ensure accurate positioning, the upper positioning protrusion 15 is inserted into the main through hole in the middle of the top plate of the pump housing 100 by pushing the push rod of the upper clamping cylinder 13. The outer side wall of the upper positioning protrusion 15 is in close contact with the inner side wall of the main through hole in the middle. The upper clamping plate 14 presses against the top surface of the annular protrusion connecting part 101 formed on the top surface of the top plate around the main through hole in the middle of the pump housing 100, thereby fixing it. At this time, the milling machine tool can rotate and perform end milling on the flange end face of the front end of the discharge pipe of the pump housing 100, which has a good processing effect.

[0033] After processing, the pump housing 100 can be removed by simply retracting the push rod of the upper clamping cylinder 13 to lift the upper clamping plate 14. Then, the new pump housing 100 that needs to be processed can be placed on it for installation. This method is effective and efficient.

[0034] This embodiment is suitable for mass production of pump casings 100 of the same specifications and dimensions.

[0035] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A clamping tool for end face turning of a pump housing feed inlet, comprising a bottom fixing plate (10), characterized in that: The bottom fixing plate (10) has a bottom horizontal support plate (20) fixed to the middle of its top surface by bolts. The bottom horizontal support plate (20) has an upwardly extending central positioning column (21) fixed or formed in the middle of its top surface. The bottom end face of the pump casing (100) to be processed presses against the top surface of the bottom horizontal support plate (20). The central positioning column (21) is inserted into the central through hole in the middle of the bottom plate of the pump casing (100). The outer side wall of the central positioning column (21) is in close contact with the inner side wall of the central through hole. Vertical support columns (11) are fixed to the left and right front and rear parts of the top surface of the bottom fixing plate (10). The upper fixing plate (12) is fixed to the top surface of all the vertical support columns (11). An upper clamping cylinder (13) is fixed to the middle of the top surface of the upper fixing plate (12). The bottom end of the push rod of the upper clamping cylinder (13) extends out of the bottom surface of the upper fixing plate (12) and is fixed to the upper clamping plate (14). An upper positioning protrusion (15) is fixed to the middle of the bottom surface of the upper clamping plate (14). The upper positioning protrusion (15) is inserted into the middle main through hole of the top plate of the pump housing (100). The outer side wall of the upper positioning protrusion (15) is in close contact with the inner side wall of the middle main through hole. The upper clamping plate (14) presses against the top surface of the annular protrusion connecting part (101) formed on the top surface of the top plate around the middle main through hole of the pump housing (100).

2. The clamping tool for machining the end face of the feed inlet of a pump housing according to claim 1, characterized in that: The left and right sides of the bottom horizontal support plate (20) of the central positioning post (21) are both formed with connecting screw holes (22). The screw part formed in the middle of the bottom surface of the lower positioning post (23) is screwed into the corresponding connecting screw hole (22). The bottom surface of the lower positioning post (23) is pressed against the top surface of the bottom horizontal support plate (20). The lower positioning post (23) is inserted into the connecting through hole (102) formed on the bottom plate at the left and right sides of the central through hole of the pump housing (100). The outer side wall of the lower positioning post (23) is in close contact with the inner side wall of the corresponding connecting through hole (102).

3. The clamping tool for machining the end face of the feed inlet of a pump housing according to claim 1, characterized in that: The left and right front and rear parts of the upper pressing plate (14) are all formed with vertical through holes. The guide sleeve (1) is inserted into the corresponding vertical through hole. The outer side wall of the guide sleeve (1) is pressed against the inner side wall of the corresponding vertical through hole. The radial extension edge formed on the top outer side wall of the guide sleeve (1) is above the upper pressing plate (14). The bottom surface of the radial extension edge is pressed against the top surface of the upper pressing plate (14). The vertical support column (11) is inserted into the corresponding guide sleeve (1). The outer side wall of the vertical support column (11) is close to the inner side wall of the corresponding guide sleeve (1).

4. The clamping tool for machining the end face of the feed inlet of a pump housing according to claim 1, characterized in that: The end of the discharge pipe of the pump casing (100) extends out in front of the bottom fixing plate (10).

5. The clamping tool for machining the end face of the feed inlet of a pump housing according to claim 4, characterized in that: A vertical plate (30) is fixed on the top surface of the bottom fixing plate (10) at the right side of the discharge pipe of the pump casing (100). A central threaded through hole extending to the left and right is formed in the middle of the vertical plate (30). The screw part of the adjusting bolt (31) is screwed into the central threaded through hole. The left end of the screw part of the adjusting bolt (31) extends out of the left side wall of the vertical plate (30) and is movably connected to the side limiting pressure plate (32). The left side wall of the side limiting pressure plate (32) presses against the right side wall of the discharge pipe of the pump casing (100).

6. The clamping tool for machining the end face of the feed inlet of a pump housing according to claim 5, characterized in that: The right end of the screw portion of the adjusting bolt (31) extends out of the vertical plate (30) and is formed with a rotating part. A locking nut (33) is screwed onto the screw portion of the adjusting bolt (31), and the locking nut (33) presses against the right side wall of the vertical plate (30).

7. The clamping tool for machining the end face of the feed inlet of a pump housing according to claim 6, characterized in that: The bottom surface of the side limiting pressure plate (32) is fixed with a bottom self-lubricating block (34), and the bottom surface of the bottom self-lubricating block (34) is closely attached to the top surface of the bottom fixing plate (10).

8. The clamping tool for machining the end face of the feed inlet of a pump housing according to claim 5, characterized in that: An anti-slip and wear-resistant block (35) is fixed on the left side wall of the side limiting pressure plate (32), and the left side wall of the anti-slip and wear-resistant block (35) presses against the right side wall of the discharge pipe of the pump casing (100).

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