CN204430363U - Screw pump stator tube with uniform wall thickness drill jig - Google Patents

Abstract

The utility model discloses a drilling mold for a stator tube of an equal-wall-thickness screw pump, which solves the problem of difficulty in processing the positioning hole of the existing stator tube. Specifically, the inner wall of the drilling mold has the same spiral profile as the outer surface of the stator tube, and the drilling mold hole is processed by a machine tool at the high point of the profile line, and the drilling mold sleeve is embedded in the drilling mold hole; the wire cutting method is used Divide the drilling template evenly into two or three modules, the modules are fixed by clamping bolts, and positioning holes are designed between any two modules. The drilling mold of the utility model can improve the drilling precision of the stator tube of the equal-wall-thick screw pump, improve the matching quality of the mold core of the equal-wall-thick screw pump, and can also improve the processing efficiency; the drilling mold is simple in structure, convenient and practical.

Description

Equal wall thickness screw pump stator tube drilling jig

technical field

The utility model relates to a processing tool for a stator tube of an equal-wall-thickness screw pump, in particular to a drilling processing tool for positioning holes of an equal-wall-thickness screw pump stator tube.

Background technique

The constant wall thickness stator screw pump has uniform rubber wall thickness, which can improve the performance of the pump, improve the efficiency of the system, and prolong the service life. Stator mold matching is an important step in the manufacturing process of the screw pump stator with equal wall thickness. The existing stator mold matching process is to process a certain number of positioning holes on the stator tube wall, and screw the positioning bolts into the positioning holes. By adjusting the positioning Bolts are used to adjust the relative position of the mold core in the stator tube. When processing the positioning hole of the constant-wall-thickness stator tube, the positioning hole is required to be located at the high point or low point of the section line. Due to the spiral outer surface of the constant-wall-thickness stator tube, it is difficult to accurately find the high point or low point. The method of manual measurement and scribing has poor processing accuracy and low efficiency. Often, the positioning hole drilling position is not accurate, which affects the quality of the mold core of the screw pump core, and causes the rubber core of the screw pump stator to be eccentric.

Contents of the invention

The purpose of the utility model is to develop a constant wall thickness screw pump stator tube drilling mold, which is used for processing the positioning hole of the constant wall thickness screw pump stator tube. Using the drilling template to process the positioning hole of the stator tube can significantly improve the drilling accuracy, improve work efficiency, and optimize the core positioning process of the screw pump with equal wall thickness.

In order to achieve the above invention, the technical solution adopted by the utility model is: a drilling mold for the stator tube of a screw pump with equal wall thickness, including a drilling mold body, the inner wall of the drilling mold has the same spiral profile as the outer surface of the stator tube, and The high point of the profile line is machined with a mold hole, and a mold cover is inserted in the hole; the mold body is evenly divided into two or three modules by wire cutting, and the modules are fixed by clamping bolts. Positioning holes are arranged between any two modules.

Preferably, the above-mentioned jig cover adopts a detachable connection mode, and the inner hole of the jig cover is larger than the outer diameter of the drill bit.

The above-mentioned uniform division of the drill template body into three modules is obtained by cutting with a wire along the intersection of two adjacent arc surfaces to obtain three independent modules.

The above-mentioned uniform division of the drilling template body into two modules is cut along the center positions of the two cross-sections with wire cutting to obtain two independent modules.

Beneficial effects of the utility model:

1) The utility model provides a new tool and method for drilling stator tubes of constant wall thickness screw pump stator tubes;

2) The drilling mold of the utility model can improve the drilling accuracy of the stator tube of the screw pump with equal wall thickness, improve the matching quality of the core of the screw pump with equal wall thickness, and can also improve the processing efficiency;

3) The utility model is simple in structure, convenient and practical.

Description of drawings

Figure 1 is a schematic diagram of the structure of the stator tube drilling jig of the screw pump with three heads and equal wall thickness.

Figure 2. Sectional view of Figure 1.

Fig. 3 is a view from direction A in Fig. 2 .

Fig. 4 is a schematic diagram of the structure of the stator tube drilling jig of the screw pump with double heads and equal wall thickness.

Detailed ways

Below in conjunction with specific embodiment, the utility model is further described:

Example 1: Drilling mold for stator tube of screw pump with three heads and equal wall thickness

As shown in Fig. 1 combined with Fig. 2 and Fig. 3: a three-head equal-wall-thickness screw pump stator tube drilling jig, including a jig body 1, the inner wall of the jig body 1 has the same structure as the three-head equal-wall-thickness screw pump stator tube to be processed The spiral molded line 2 of the molded line 2 is machined with a machine tool to drill a mold hole at the high point of the molded line 2, and a drill mold cover 3 is embedded in the hole. Cut the drill template body 1 along the intersection line 12 of two adjacent arc surfaces with wire cutting to obtain three independent modules 11, and a positioning hole 4 is designed on the interface of any two modules 11. When drilling the stator tube of the screw pump with equal wall thickness, fit the three modules on the surface of the stator tube where the hole needs to be drilled, put the positioning pin in the positioning hole 4 to ensure the alignment of the modules, and screw the clamping bolt 5 into the clamping hole 4. The mold bolt holes are used to fasten the three modules 11 on the surface of the stator tube by the clamping bolts 4 . The drill press is positioned by the drill template body 1, and the drill bit is drilled through the inner hole of the drill template cover 3.

Example 2: Drilling mold for stator tube of screw pump with double heads and equal wall thickness

As shown in Figure 4: a double-head equal-wall-thickness screw pump stator tube drilling jig, including a jig body 1, the inner wall of the jig body 1 has the same helical profile 2 as the double-head equal-wall-thickness screw pump stator tube to be processed , process the drilling mold hole with a machine tool, and insert the drilling mold cover 3 in the hole. The drill template body 1 is cut along the central positions of the two cross-sections by wire cutting to obtain two independent modules 11, and a positioning hole 4 is designed on the interface of the two modules 11. When drilling the stator tube of the screw pump with equal wall thickness, attach the two modules 11 to the surface of the stator tube where the hole needs to be drilled, put the positioning pin in the positioning hole 4 to ensure the alignment of the modules, and screw the clamping bolt 5 into the The mold clamping bolt holes are used to fasten the two modules 11 on the surface of the stator tube by the mold clamping bolts 5 . The drill press is positioned by the drill template body 1, and the drill bit is drilled through the inner hole of the drill template cover 2.

Claims (4)

1. a screw pump stator tube with uniform wall thickness drill jig, comprises model drilling body, it is characterized in that: described model drilling body inwall has the spirality molded line the same with stator tube outer surface, in the machine tooling drill jig hole, height point position of molded line, and in drill jig hole diamond setting die sleeve; And be two or three modules by Linear cut mode by model drilling body even partition, fixed by die bolt between module, between any two modules, be provided with locating hole.

2. screw pump stator tube with uniform wall thickness drill jig according to claim 1, is characterized in that: described drill jig sleeve adopts the mode that removably connects, and the endoporus of drill jig sleeve is greater than outside diameter.

3. screw pump stator tube with uniform wall thickness drill jig according to claim 1, is characterized in that: described is three modules by model drilling body even partition, is to cut along the intersection position Linear cut of adjacent two cambered surfaces, obtains three independently modules.

4. screw pump stator tube with uniform wall thickness drill jig according to claim 1, is characterized in that: described is two modules by model drilling body even partition, is cut along two kernel of section position Linear cut, obtains two independently modules.