Pump shell locking hole finish machining device

Abstract

The utility model relates to a pump case locking hole finish machining device which is characterized in that a pump case is provided with a mounting flange, the mounting flange is provided with three locking holes which are evenly distributed in the circumferential direction, the machining device is provided with a working table, a hollow clamp base is installed on the working table, the pump case is installed on the clamp base in a clamped mode, and the mounting flange of the pump case is attached to the upper end face of the clamp base. Pressing plates which are uniformly distributed in the circumferential direction of the pump shell and can be pressed on the mounting flange are arranged on the clamp seat; a positioning pin is arranged in the locking hole, a lifting air cylinder capable of pushing the positioning pin to ascend and descend is installed on the bottom face of the workbench, and the positioning pin downwards retreats from the locking hole when the locking hole is machined. According to the utility model, the liftable positioning pin is arranged in the locking hole, and the positioning pin downwards retreats from the locking hole when the locking hole is processed, so that the pump shell can be accurately positioned, the operation efficiency is improved, and the processing quality of the locking hole of the pump shell is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a pump casing locking hole finishing device. Background Art

[0002] In the pump casing structure of the oil pump, there are three locking holes on the circumference of the mounting flange. The hole precision is required to be high. In the traditional processing technology, when clamping the pump casing, a positioning pin is generally installed in a locking hole as an installation positioning, and then the pump casing is clamped for processing.

[0003] Obviously, the conventional clamping method mentioned above can only complete the processing of two locking holes in one clamping, and then the third locking hole must be processed after the pump housing is clamped again, using the processed locking hole as a positioning. Therefore, the existing processing device requires two clampings to complete the processing of the pump housing locking hole, which has low work efficiency, and the two clampings will also have an adverse effect on the processing quality of the locking hole. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a pump casing locking hole finishing device which can improve the processing efficiency and ensure the processing accuracy.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a pump casing locking hole finishing device, the pump casing has a mounting flange, the mounting flange has three locking holes evenly distributed in the circumferential direction, the processing device has a workbench, a hollow clamp seat is installed on the workbench, the pump casing is clamped on the clamp seat and the mounting flange of the pump casing fits the upper end surface of the clamp seat, the clamp seat is provided with a pressure plate evenly distributed around the circumference of the pump casing and can be pressed on the mounting flange; a positioning pin is provided in the locking hole, and a lifting cylinder that can push the positioning pin to move up and down is installed on the bottom surface of the workbench, and the positioning pin exits the locking hole downward when processing the locking hole.

[0006] Furthermore, a process cavity corresponding to the position of the locking hole is provided on the fixture seat, a pin hole is provided from the bottom surface of the process cavity to the bottom surface of the fixture seat, and the positioning pin can be raised and lowered in the pin hole.

[0007] Preferably, the positioning pin includes a cylindrical pin arranged in one locking hole and a diamond pin arranged in another locking hole, and the lower ends of the cylindrical pin and the diamond pin are both connected to a lifting rod, and the lifting rod is fixedly connected to the piston rod of the lifting cylinder.

[0008] Specifically, a clamping cylinder is installed on the workbench to push the front end of the pressure plate to press it on the mounting flange. The piston rod of the clamping cylinder is movably connected to the rear end of the pressure plate. A support is fixed on the cylinder body of the clamping cylinder, and a connecting rod is hinged between the support and the middle part of the pressure plate.

[0009] The beneficial effect of the utility model is that the utility model sets a liftable positioning pin in the locking hole, and the positioning pin exits the locking hole downward when the locking hole is processed, thereby achieving accurate positioning of the pump casing, improving working efficiency, and ensuring the processing quality of the locking hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0012] Figure 2 It is a top view structural schematic diagram of the utility model.

[0013] Figure 3 It is a schematic diagram of the connection structure between the positioning pin and the lifting cylinder of the utility model.

[0014] In the figure: 1. pump housing, 1-1. mounting flange, 1-2. locking hole, 2. workbench, 3. fixture seat, 3-1. process cavity, 4. pressure plate, 5-1. cylindrical pin, 5-2. diamond pin, 6. lifting cylinder, 7. lifting rod, 8. clamping cylinder, 9. support, 10. connecting rod. DETAILED DESCRIPTION

[0015] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0016] like Figure 1 to Figure 3 A pump casing locking hole finishing device is shown, the outer periphery of the pump casing 1 has a mounting flange 1-1, and three locking holes 1-2 are evenly distributed circumferentially on the mounting flange 1-1, and the processing device is used for finishing the locking holes 1-2.

[0017] The processing device includes a workbench 2, which is placed on the ground by fixing support plates on both sides thereof. A fixture seat 3 is installed on the workbench 2, and the center of the fixture seat 3 has a through hole. The outer edge of the fixture seat 3 is provided with three circumferentially evenly distributed process cavities 3-1, and pin holes are provided from the bottom surface of the process cavity 3-1 to the bottom surface of the fixture seat 3.

[0018] The pump housing 1 below the mounting flange 1-1 is clamped in the through hole in the center of the fixture seat 3, the mounting flange 1-1 fits against the upper end surface of the fixture seat 3, and the three locking holes 1-2 correspond to the positions of the process cavities 3-1 respectively.

[0019] The clamp seat 3 is provided with three pressure plates 4 evenly distributed around the pump housing 1. The three pressure plates 4 are correspondingly pressed on the surface of the mounting flange 1-1 close to the locking hole 1-2. A pressure cylinder 8 for pushing the front end of the pressure plate 4 to be pressed on the mounting flange 1-1 is installed on the workbench 2 below the pressure plate 4. A support 9 is fixed on the cylinder body of the pressure cylinder 8. The piston rod of the pressure cylinder 8 is movably connected to the rear end of the pressure plate 4, and a connecting rod 10 is hinged between the support 9 and the middle part of the pressure plate 4.

[0020] A locating pin is respectively arranged in the two locking holes 1-2, wherein the locating pin in one of the locking holes 1-2 is a cylindrical pin 5-1, and the locating pin in the other locking hole 1-2 is a diamond pin 5-2, so as to achieve precise positioning and avoid the problem of over-positioning; the cylindrical pin 5-1 and the diamond pin 5-2 are both matched with the pin hole clearance on the fixture seat 3 where the process cavity 3-1 is located, and the lower ends of the cylindrical pin 5-1 and the diamond pin 5-2 are connected with a lifting rod 7, and a lifting cylinder 6 is installed on the bottom surface of the workbench 2, and the lifting rod 7 is fixedly connected to the piston rod of the lifting cylinder 6.

[0021] With such a processing device, when clamping the pump casing 1, the pump casing 1 is first placed on the fixture seat 3, so that the shell of the pump casing 1 below the mounting flange 1-1 is clamped in the through hole in the center of the fixture seat 3. At this time, the cylindrical pin 5-1 and the diamond pin 5-2 are both retracted downward in the pin hole, and the position of the pump casing 1 is adjusted so that the three locking holes 1-2 correspond to the positions of the process cavity 3-1 of the fixture seat 3; then the lifting cylinder 6 is actuated to push the cylindrical pin 5-1 and the diamond pin 5-2 up to the locking hole 1-2 and the pump casing 11 is positioned. After positioning, the clamping cylinder 8 is actuated to push the front end of the pressure plate 4 to be pressed on the mounting flange 1-1. After the pump casing 1 is clamped, the lifting cylinder 6 is actuated to retract the cylindrical pin 5-1 and the diamond pin 5-2 back into the pin hole again. Finally, the processing equipment is started to perform fine processing on the locking hole 1-2.

[0022] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A pump casing locking hole finishing device, the pump casing (1) having a mounting flange (1-1), the mounting flange (1-1) having three locking holes (1-2) evenly distributed in the circumferential direction, wherein: The processing device comprises a workbench (2), on which a hollow fixture seat (3) is installed, the pump housing (1) is clamped on the fixture seat (3) and the mounting flange (1-1) of the pump housing (1) fits the upper end surface of the fixture seat (3), and the fixture seat (3) is provided with a pressure plate (4) which is evenly distributed around the circumference of the pump housing (1) and can be pressed on the mounting flange (1-1); a positioning pin is provided in the locking hole (1-2), and a lifting cylinder (6) which can push the positioning pin to move up and down is installed on the bottom surface of the workbench (2), and the positioning pin is downwardly withdrawn from the locking hole (1-2) when processing the locking hole (1-2).

2. The pump casing locking hole finishing device according to claim 1, characterized in that: The clamp seat (3) is provided with a process cavity (3-1) corresponding to the position of the locking hole (1-2), and a pin hole is provided from the bottom surface of the process cavity (3-1) to the bottom surface of the clamp seat (3), and the positioning pin can be raised and lowered in the pin hole.

3. The pump casing locking hole finishing device according to claim 2, characterized in that: The positioning pin comprises a cylindrical pin (5-1) arranged in a locking hole (1-2) and a diamond pin (5-2) arranged in another locking hole (1-2), the lower ends of the cylindrical pin (5-1) and the diamond pin (5-2) are both connected to a lifting rod (7), and the lifting rod (7) is fixedly connected to the piston rod of the lifting cylinder (6).

4. The pump casing locking hole finishing device according to claim 1, characterized in that: The workbench (2) is provided with a clamping cylinder (8) for pushing the front end of the pressure plate (4) to be pressed against the mounting flange (1-1); the piston rod of the clamping cylinder (8) is movably connected to the rear end of the pressure plate (4); a support (9) is fixed to the cylinder body of the clamping cylinder (8); and a connecting rod (10) is hinged between the support (9) and the middle part of the pressure plate (4).

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