Combined machining device for three threaded holes of water pump shell

Abstract

The utility model relates to a kind of three thread hole combination machining clamps of water pump pump shell, with bottom plate and upper template, lifting plate is equipped between bottom plate and upper template, pump shell positioning is set on lifting plate, the bottom surface of the protruding part of pump shell front end is supported on the front end surface of lifting plate, the bottom surface of pump shell rear end is separately provided with support column supported on the rear end surface of lifting plate with left and right distance, the bottom surface of upper template is uniformly distributed with at least three positioning pressure rods that are compressed in the bottom surface of pump shell inner cavity with lifting plate ascending, process hole with left and right distance is set up on upper template, U-shaped gap corresponding with protruding part is set up in the middle of upper template front end.The utility model positions the pump shell to be machined on lifting plate by support column and pump shell protruding part, makes the positioning pressure rod on upper template compressed in the bottom surface of pump shell inner cavity using lifting plate ascending, to complete to pump shell clamping, this workpiece ascending clamping piece stationary compression mode, it can realize more stable and firm clamping effect, it is favorable to ensure workpiece machining precision.

Description

Technical Field

[0001] This utility model relates to the field of machining tooling technology, and in particular to a machining fixture for a combination of three threaded holes in a water pump casing. Background Technology

[0002] In the pump casing machining process, threaded holes need to be machined on the end face of the pump casing and in the protrusion connected to the outer circumference of the end face. To ensure machining accuracy, the drilling and tapping of the three threaded holes are usually completed in one clamping. Therefore, special fixtures are used to clamp the pump casing.

[0003] In existing clamping structures used for pump casings, the conventional method is to position and support the workpiece, and then move the clamping component down to clamp the workpiece. This traditional clamping structure has certain shortcomings in both positioning and clamping. It is prone to vibration during processing, resulting in poor clamping stability of the pump casing and affecting processing accuracy. Summary of the Invention

[0004] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a water pump casing three-thread hole combination machining fixture to improve clamping stability and ensure machining accuracy.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a water pump casing three-threaded hole combination processing fixture, having a base plate, an upper template parallel to the base plate above the base plate, a lifting plate between the base plate and the upper template, the pump casing to be processed is positioned on the lifting plate, the bottom surface of the protrusion at the front end of the pump casing is supported on the front end surface of the lifting plate, the bottom surface of the rear end of the pump casing is provided with support columns on the left and right sides, which are supported on the rear end surface of the lifting plate, the bottom surface of the upper template is evenly distributed with at least three positioning pressure rods on the circumference, which are pressed against the bottom surface of the inner cavity of the pump casing as the lifting plate rises, the upper template has process holes on the left and right sides that correspond to the threaded holes processed on the end face of the pump casing, and the middle of the front end of the upper template has a U-shaped notch corresponding to the protrusion.

[0006] Specifically, guide rods are fixedly connected between the four corners of the base plate and the four corners of the upper template, and linear bearings that slide with the guide rods are installed on the lifting plate. Fixing seats for fixing the guide rods are provided at the four corners of the upper surface of the base plate and the four corners of the upper surface of the upper template.

[0007] Furthermore, a lifting cylinder connected to a lifting plate is installed on the bottom plate at a distance from each other on the left and right. A through hole is opened at the center of the lifting plate. A lifting cylinder is installed on the bottom plate. A ball-head support is fixed on the piston rod of the lifting cylinder. When the pump housing is positioned and pressed, the ball-head support rises and passes through the through hole to press against the center of the bottom surface of the pump housing.

[0008] Still not mentioning that a pad is fixed to the bottom surface of the upper template next to the positioning pressure rod.

[0009] Furthermore, the rear end face of the lifting plate is fixed with limiting posts that abut against the outer circumference of the pump casing when the pump casing is positioned on the lifting plate.

[0010] Furthermore, a tapered pressure bar is fixed on the upper template to fit against the outer circumference of the protrusion when the pump casing is clamped, and the tapered pressure bar is positioned on the side near the U-shaped notch.

[0011] The beneficial effects of this utility model are as follows: This utility model positions the pump shell to be processed on the lifting plate by the support column on the bottom surface of the rear end of the pump shell and the protrusion on the front end of the pump shell. The lifting plate rises and presses the positioning pressure rod on the upper template against the bottom surface of the inner cavity of the pump shell, thereby completing the clamping of the pump shell. This clamping method of the workpiece rising and the clamping part remaining stationary can achieve a more stable and firm clamping effect, which is conducive to ensuring the processing accuracy of the workpiece. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the state when the pump casing is clamped by this utility model.

[0015] Figure 3 This is a schematic diagram of the upper template described in this utility model.

[0016] Figure 4 This is a schematic diagram of the pump casing described in this utility model.

[0017] In the diagram: 1. Base plate, 2. Upper template, 2-1. Process hole, 2-2. U-shaped notch, 3. Lifting plate, 3-1. Through hole, 4. Pump housing, 4-1. Protrusion, 5. Support column, 6. Positioning pressure rod, 7. Guide rod, 8. Linear bearing, 9. Fixed seat, 10. Lifting cylinder, 11. Lifting cylinder, 12. Ball head support column, 13. Pad block, 14. Limiting column, 15. Conical pressure rod. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] A jig for machining a water pump casing with three threaded holes, wherein the water pump casing 4 has the following structure: Figure 4As shown, it includes a housing portion with an inner cavity and a protrusion 4-1 located at the front end of the housing portion and integrally formed with the housing portion. The protrusion 4-1 has a cavity communicating with the inner cavity of the housing portion. Of the three threaded holes machined, two threaded holes are located on the lugs on the outer periphery of the upper end face of the pump housing 4, and the other threaded hole is located on the bottom wall of the cavity of the protrusion 4-1.

[0020] like Figures 1-3 As shown, the combined machining fixture includes a base plate 1 installed on the worktable of a multi-hole drilling machine during use. An upper template 2 parallel to the base plate 1 is provided above the base plate 1. A lifting plate 3 is provided between the base plate 1 and the upper template 2. The pump housing 4 to be processed is positioned on the lifting plate 3. The bottom surface of the protrusion 4-1 is supported on the front end surface of the lifting plate 3. The rear bottom surface of the pump housing 4 has support columns 5 on the left and right sides, which are respectively supported on the rear end surface of the lifting plate 3.

[0021] Guide rods 7 are fixedly connected between the four corners of the base plate 1 and the four corners of the upper template 2. A linear bearing 8 that slides with the guide rods 7 is installed on the lifting plate 3. Fixing seats 9 for fixing the guide rods 7 are provided at the four corners of the upper surface of the base plate 1 and the four corners of the upper surface of the upper template 2.

[0022] Lifting cylinders 10 are installed on the base plate 1 at intervals on the left and right. The piston rod of the lifting cylinder 10 is connected to the bottom surface of the lifting plate 3. The lifting cylinder 10 pushes the lifting plate 3 to move up and down along the guide rod 7.

[0023] The upper template 2 has three positioning rods 6 evenly distributed around its bottom surface. As the lifting plate 3 rises, the three positioning rods 6 press against the bottom surface of the inner cavity of the pump housing 4. The upper template 2 has process holes 2-1 that are spaced apart from each other and correspond to the threaded holes machined on the end face of the pump housing 4. The upper template 2 has a U-shaped notch 2-2 at the middle of its front end that corresponds to the protrusion 4-1.

[0024] A through hole 3-1 is provided at the center of the lifting plate 3, and a lifting cylinder 11 is installed on the bottom plate 1. A ball-head support 12 is fixed on the piston rod of the lifting cylinder 11, which rises through the through hole 3-1 and presses against the center of the bottom surface of the pump housing 4 when the pump housing 4 is positioned and pressed.

[0025] A pad 13 is fixed on the bottom surface of the upper template 2 next to the positioning pressure rod 6. A limiting post 14 is fixed on the left and right sides of the rear end face of the lifting plate 3, which abuts against the outer circumference of the pump shell 4 when the pump shell 4 is positioned on the lifting plate 3. A tapered pressure rod 15 is fixed on the upper template 2, which is close to the outer circumference of the protrusion 4-1 when the pump shell 4 is clamped. The tapered pressure rod 15 is set on one side near the U-shaped notch 2-2.

[0026] During clamping, the support column 5 on the bottom rear end of the pump housing 4 and the bottom surface of the protrusion 4-1 are supported on the front end of the lifting plate 3, pushing the pump housing 4 into place until its outer circumference is close to the two limiting columns 14; then the lifting cylinder 10 is activated, pushing the lifting plate 3 to rise. As the lifting plate 3 rises, the three positioning pressure rods 6 press against the bottom surface of the inner cavity of the pump housing 4. At this time, the pad block 13 presses against the circumferentially distributed protrusions on the upper end surface of the pump housing 4, the conical pressure rod 15 is close to the outer circumferential surface of the protrusion 4-1, and the lifting cylinder 11 pushes the ball head support column 12 to press against the center of the bottom surface of the pump housing 4, thus completing the clamping of the pump housing 4 on the fixture. The drill bit of the multi-hole drilling machine passes through two process holes 2-1 and a U-shaped notch 2-2, and simultaneously performs drilling and tapping on the pump housing 4.

[0027] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A fixture for machining three threaded holes in a water pump casing, comprising a base plate (1) and an upper template (2) parallel to the base plate (1) above the base plate (1), characterized in that: A lifting plate (3) is provided between the base plate (1) and the upper template (2). The pump shell (4) to be processed is positioned on the lifting plate (3). The bottom surface of the protrusion (4-1) at the front end of the pump shell (4) is supported on the front end surface of the lifting plate (3). Support columns (5) are provided on the left and right sides of the bottom surface of the rear end of the pump shell (4) and are supported on the rear end surface of the lifting plate (3). At least three positioning pressure rods (6) are evenly distributed around the bottom surface of the upper template (2) and are pressed against the bottom surface of the inner cavity of the pump shell (4) as the lifting plate (3) rises. Process holes (2-1) are opened on the upper template (2) and are spaced apart on the left and right sides and correspond to the threaded holes processed on the end face of the pump shell (4). A U-shaped notch (2-2) corresponding to the protrusion (4-1) is opened in the middle of the front end of the upper template (2).

2. The water pump casing three-threaded hole combination machining fixture as described in claim 1, characterized in that: Guide rods (7) are fixedly connected between the four corners of the base plate (1) and the four corners of the upper template (2). A linear bearing (8) that slides with the guide rods (7) is installed on the lifting plate (3). Fixing seats (9) for fixing the guide rods (7) are provided at the four corners of the upper surface of the base plate (1) and the four corners of the upper surface of the upper template (2).

3. The water pump casing three-threaded hole combination machining fixture as described in claim 2, characterized in that: The base plate (1) is equipped with lifting cylinders (10) that are connected to the lifting plate (3) and piston rods, which are installed on the left and right sides respectively. The lifting plate (3) has a through hole (3-1) at the center. The base plate (1) is equipped with a lifting cylinder (11). The piston rod of the lifting cylinder (11) is fixed with a ball head support (12) that rises through the through hole (3-1) and presses against the center of the bottom surface of the pump housing (4) when the pump housing (4) is positioned and pressed.

4. The water pump casing three-threaded hole combination machining fixture as described in claim 1, characterized in that: A pad (13) is fixed on the bottom surface of the upper template (2) next to the positioning pressure rod (6).

5. The water pump casing three-threaded hole combination machining fixture as described in claim 1, characterized in that: The lifting plate (3) has a limiting post (14) fixed at a distance from the left and right at the rear end face. When the pump shell (4) is positioned on the lifting plate (3), it abuts against the outer circumference of the pump shell (4).

6. The water pump casing three-threaded hole combination machining fixture as described in claim 1, characterized in that: The upper template (2) is fixed with a tapered pressure bar (15) that fits against the outer circumference of the protrusion (4-1) when the pump housing (4) is clamped. The tapered pressure bar (15) is set on one side near the U-shaped notch (2-2).

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