Special fixture for rapid machining and forming of shield pump

Abstract

The utility model relates to a special fixture for rapid machining and forming of a shield pump, and belongs to the technical field of production of shield pump shells. Comprising a horizontally-arranged fixing plate, the four corners of the fixing plate are each provided with a supporting column assembly used for being connected with a workbench, the upper surface of the fixing plate is detachably provided with a circular positioning plate, and the upper surface of the circular positioning plate is provided with an annular boss; and the second connecting bolt is used for fixing the semi-finished pump shell on the circular positioning plate. Compared with the prior art, the tool has the advantages that the machined spigot of the semi-finished pump shell and the annular boss are assembled and positioned, the spigot is connected to the upper surface of the circular positioning plate in a pressed mode, the annular boss is arranged on the outer ring of the spigot in a sleeved mode, and then the semi-finished pump shell is fixed to the circular positioning plate through the second connecting bolt; after the semi-finished product of the pump case is fixed on the workbench of the milling machine, the semi-finished product of the pump case can be quickly positioned and clamped, and the clamping frequency is reduced, so that the purpose of improving the quality of the finished product is achieved.

Description

Technical Field

[0001] The utility model relates to a special clamp for rapid processing and forming of a shielded pump, belonging to the technical field of production of shielded pump shells. Background Art

[0002] The canned motor pump is a seal-free pump, which is characterized by the pump and the drive motor are sealed in a pressure vessel filled with the pumped medium. This pressure vessel has only static seals and no dynamic seals, so it can achieve completely leak-free operation.

[0003] The utility model with patent number 202121757647.0 discloses a canned pump, including: a motor; a pump body, which includes a pump casing and an impeller, the pump casing is fixed on the motor, and the impeller is drivingly connected to the motor; the pump casing is provided with a water inlet channel and a water outlet channel, and a conical inducer is provided at one end of the impeller close to the water inlet channel, and an annular groove is provided on the inner wall of the water inlet channel, and the annular groove is located at the root of the conical inducer. The conical inducer can prevent carbon dioxide from directly colliding and rebounding with the impeller when it enters. The conical inducer can induce, reduce rebound, and improve anti-cavitation performance; the backflow of the external aid of the conical inducer is carried out in the annular groove, which can avoid collision with the incoming flow and reduce cavitation.

[0004] The canned motor pump has a long casting cycle, including mold design and processing, product casting cycle, etc., which is about 45-50 days. At present, the method of casting first and then fine processing by milling machine is mostly adopted. However, the current technical considerations are not comprehensive and have the following disadvantages: 1. The processing of the canned motor pump requires multiple clamping, which is time-consuming and labor-intensive. 2. The positioning is not accurate. 3. The size and appearance are difficult to guarantee due to the multiple positioning times.

[0005] In order to solve one of the above problems, a special fixture for rapid processing of canned motor pumps is urgently needed. Utility Model Content

[0006] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is: how to achieve rapid positioning and clamping of the semi-finished pump casing and reduce the number of clamping times to achieve the purpose of improving the quality of the finished product. For this purpose, a special fixture for rapid processing and forming of a shielded pump is provided.

[0007] The special fixture for rapid processing and forming of a shielded pump described in the utility model includes a horizontally arranged fixing plate, and is characterized in that: a support column assembly for connecting to a workbench is respectively installed at the four corners of the fixing plate, a circular positioning plate is detachably installed on the upper surface of the fixing plate, the upper surface of the circular positioning plate has an annular boss, and also includes a second connecting bolt for fixing the pump casing semi-finished product on the circular positioning plate.

[0008] Take out a casting blank to be processed. First, use a universal parallel jaw vice to fix the above-mentioned rectangular block blank on the workbench of the milling machine, and use the cutter of the milling machine to process the front surface of the rectangular block blank to manufacture a semi-finished pump casing with a stop, and process multiple groups of threaded holes B for connection on the stop. Finally, take the semi-finished pump casing off the parallel jaw vice.

[0009] Then, assemble and position the processed stop of the semi-finished pump casing with the annular boss. The stop is press-fitted on the upper surface of the circular positioning plate, and the annular boss is sleeved on the outer ring of the stop. Then, use the second connecting bolt to fix the semi-finished pump casing on the circular positioning plate. After fixing the semi-finished pump casing on the workbench of the milling machine, use the cutter of the milling machine again to continue processing the back surface of the semi-finished pump casing. It can realize the rapid positioning and clamping of the semi-finished pump casing, and reduce the number of clamping times to achieve the purpose of improving the product quality.

[0010] Furthermore, the support column assembly includes a support sleeve and a threaded rod passing through the support sleeve. The upper and lower ends of the support sleeve are respectively abutted against the fixed plate and the workbench. The upper end of the threaded rod passes through the fixed plate and is threadedly connected with a connecting nut. The bottom end of the threaded rod has a positioning block, and the positioning block is located in the T-slot of the workbench. A counterbore for accommodating the connecting nut is provided on the fixed plate. The rapid fixing of the fixed plate can be completed.

[0011] Furthermore, it also includes a first connecting bolt. Threaded hole A matching with the first connecting bolt is provided on the circular positioning plate. The bolt body of the first connecting bolt passes through the fixed plate and is connected with threaded hole A, and the circular positioning plate is detachably installed on the surface of the fixed plate.

[0012] Furthermore, upper through holes and lower through holes for the second connecting bolt to pass through are respectively provided on the circular positioning plate and the fixed plate. The upper through holes and the lower through holes are coaxially arranged. The bolt body of the second connecting bolt sequentially passes through the lower through hole, the upper through hole and is connected with the threaded hole B on the semi-finished pump casing.

[0013] Furthermore, there are three groups of the threaded holes A in total, which are arranged around the same vertical center line and the included angle between adjacent two is 120 degrees.

[0014] Furthermore, the fixed plate is a rectangular metal plate.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The special fixture for rapid processing and forming of the canned motor pump described in the utility model assembles and positions the machined stop surface and the annular boss of the semi-finished pump casing. The stop surface is pressed against the upper surface of the circular positioning plate, and the annular boss is sleeved on the outer ring of the stop surface. Then, the semi-finished pump casing is fixed to the circular positioning plate by means of the second connecting bolt. After the semi-finished pump casing is fixed to the workbench of the milling machine, the tool of the milling machine is used again to continue machining the back surface of the semi-finished pump casing, which can realize the rapid positioning and clamping of the semi-finished pump casing and reduce the number of clamping times, so as to achieve the purpose of improving the product quality.

[0017] The special fixture for rapid processing and forming of the canned motor pump described in the utility model makes up for the long casting cycle, quickly cooperates with the customer's R & D, and forms the product by one-time machining.

[0018] The special fixture for rapid processing and forming of the canned motor pump described in the utility model has two clamps, accurate positioning, convenient clamping, few surface tool joints, and high dimensional consistency.

[0019] The internal and external quality of the casting of the special fixture for rapid processing and forming of the canned motor pump described in the utility model reaches the qualified level. Description of the Drawings

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 It is a schematic structural diagram of the utility model;

[0022] Figure 2 It is an external structural diagram of the support column assembly of the utility model;

[0023] Figure 3 It is an external structural diagram of the circular positioning plate of the utility model;

[0024] Figure 4 It is a use state diagram of the utility model;

[0025] Figure 5 It is a connection structure diagram of the semi-finished pump casing.

[0026] In the figure: 1, workbench; 2, support column assembly; 2.1, support sleeve; 2.2, threaded rod; 2.3, connecting nut; 2.4, positioning block; 2.5, counterbore; 3, fixing plate; 4, circular positioning plate; 5, annular boss; 6, second connecting bolt; 7, semi-finished pump casing; 8, stop surface; 9, threaded hole B; 10, first connecting bolt; 11, threaded hole A; 12, upper through hole; 13, lower through hole. Detailed implementation manners

[0027] The following further describes the present utility model in conjunction with the accompanying drawings: The following further illustrates the present utility model through specific embodiments, but the present utility model is not limited thereto. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present utility model.

[0028] Example 1, as Figure 1 shown, the special fixture for rapid processing and forming of a canned motor pump includes a horizontally arranged fixed plate 3. Support column assemblies 2 for connecting with a workbench 1 are respectively installed at the four corners of the fixed plate 3. A circular positioning plate 4 is detachably installed on the upper surface of the fixed plate 3. The upper surface of the circular positioning plate 4 has an annular boss 5. It also includes a second connecting bolt 6 for fixing a pump shell semi-finished product 7 on the circular positioning plate 4.

[0029] Refer to Figures 4 - 5 , take out a casting blank to be processed. First, use a universal fixture of a vise to fix the above-mentioned rectangular block blank on the workbench of a milling machine, and use the cutter of the milling machine to process the front surface of the rectangular block blank to manufacture a pump shell semi-finished product 7 with a stop 8, and process multiple groups of threaded holes B9 for connection on the stop 8. Finally, take the pump shell semi-finished product 7 off the vise.

[0030] Then, assemble and position the processed stop 8 of the pump shell semi-finished product 7 with the annular boss 5. The stop is press-fitted on the upper surface of the circular positioning plate 4, and the annular boss 5 is sleeved on the outer ring of the stop 8. Then, with the help of the second connecting bolt 6, fix the pump shell semi-finished product 7 on the circular positioning plate 4. After fixing the pump shell semi-finished product 7 on the workbench of the milling machine, use the cutter of the milling machine again to continue processing the back surface of the pump shell semi-finished product 7. It can realize the rapid positioning and clamping of the pump shell semi-finished product 7 and reduce the number of clamping times to achieve the purpose of improving the product quality.

[0031] Example 2, as Figures 1 - 3 shown, the special fixture for rapid processing and forming of a canned motor pump includes a horizontally arranged fixed plate 3. Support column assemblies 2 for connecting with a workbench 1 are respectively installed at the four corners of the fixed plate 3. A circular positioning plate 4 is detachably installed on the upper surface of the fixed plate 3. The upper surface of the circular positioning plate 4 has an annular boss 5. It also includes a second connecting bolt 6 for fixing a pump shell semi-finished product 7 on the circular positioning plate 4.

[0032] Further, the support column assembly 2 includes a support sleeve 2.1 and a threaded rod 2.2 passing through the support sleeve 2.1. The upper and lower ends of the support sleeve 2.1 are respectively abutted against the fixed plate 3 and the workbench 1. The upper end of the threaded rod 2.2 passes through the fixed plate 3 and is threadedly connected to a connection nut 2.3. The bottom end of the threaded rod 2.2 has a positioning block 2.4, and the positioning block 2.4 is located in the T-shaped groove of the workbench 1. A counterbore 2.5 for accommodating the connection nut 2.3 is provided on the fixed plate 3. The quick fixation of the fixed plate 3 can be completed.

[0033] Further, a first connection bolt 10 is further included. A threaded hole A for cooperating with the first connection bolt 10 is provided on the circular positioning plate 4. The bolt body of the first connection bolt 10 passes through the fixed plate 3 and is connected to the threaded hole A11, detachably mounting the circular positioning plate 4 on the surface of the fixed plate 3.

[0034] Further, upper through holes 12 and lower through holes 13 for the second connection bolt 6 to pass through are respectively provided on the circular positioning plate 4 and the fixed plate 3. The upper through holes 12 and the lower through holes 13 are coaxially arranged. The bolt body of the second connection bolt 6 sequentially passes through the lower through hole 13, the upper through hole 12 and is connected to a threaded hole B9 on the semi-finished pump shell 7.

[0035] Further, three groups of the threaded holes A11 are provided, arranged around the same vertical center line and the included angle between adjacent two is 120 degrees.

[0036] Further, the fixed plate 3 is a rectangular metal plate.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

[0038] Where the present invention is not described in detail, it is the well-known technology of those skilled in the art of the present technology.

Claims

1. A special fixture for rapid processing of a canned motor pump, comprising a horizontally arranged fixing plate (3), characterized in that: A support column assembly (2) for connecting to the workbench (1) is respectively installed at the four corners of the fixing plate (3), and a circular positioning plate (4) is detachably installed on the upper surface of the fixing plate (3), wherein the upper surface of the circular positioning plate (4) has an annular boss (5) and also includes a second connecting bolt (6) for fixing the pump casing semi-finished product (7) to the circular positioning plate (4).

2. According to the special fixture for rapid processing of canned motor pumps according to claim 1, it is characterized in that: The support column assembly (2) comprises a support sleeve (2.1) and a threaded rod (2.2) penetrating the support sleeve (2.1); the upper and lower ends of the support sleeve (2.1) are respectively abutted against a fixed plate (3) and a workbench (1); the upper end of the threaded rod (2.2) penetrates the fixed plate (3) and is threadedly connected to a connecting nut (2.3); the bottom end of the threaded rod (2.2) has a positioning block (2.4); the positioning block (2.4) is located in a T-slot of the workbench (1); and the fixed plate (3) is provided with a countersunk hole (2.5) for accommodating the connecting nut (2.3).

3. According to claim 2, the special fixture for rapid processing of canned motor pumps is characterized in that: It also includes a first connecting bolt (10), and the circular positioning plate (4) is provided with a threaded hole A that matches the first connecting bolt (10). The bolt body of the first connecting bolt (10) passes through the fixing plate (3) and is connected to the threaded hole A (11), so that the circular positioning plate (4) is detachably mounted on the surface of the fixing plate (3).

4. According to the special fixture for rapid processing of canned motor pumps according to claim 3, it is characterized in that: The circular positioning plate (4) and the fixing plate (3) are respectively provided with an upper through hole and a lower through hole for the second connecting bolt (6) to pass through, the upper through hole and the lower through hole being coaxially arranged, and the bolt body of the second connecting bolt (6) passes through the lower through hole and the upper through hole in sequence to be connected with the threaded hole B (9) on the semi-finished pump casing (7).

5. According to the special fixture for rapid processing of canned motor pumps according to claim 4, it is characterized in that: The threaded holes A (11) are provided in three groups in total, arranged around the same vertical center line and with the included angle between two adjacent ones being 120 degrees.

6. According to the special fixture for rapid processing of canned motor pumps according to claim 5, it is characterized in that: The fixing plate (3) is a rectangular metal plate.

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