Positioning tool structure for machining end face of casting pipeline

Abstract

The utility model relates to a positioning tool structure for machining the end face of a casting pipeline, which comprises a base, a casting placing and positioning table is arranged on the table top of the base, and a positioning mechanism which is used for being matched with a pipeline opening in the side wall of a casting, can swing up and down by a certain angle and can stretch back and forth is arranged on the rear portion of the table top of the base. Pressing mechanisms used for pressing the side portions of the casting are arranged on the two side portions of the base. The tool facilitates positioning of the casting with the side portion provided with a pipeline, and subsequent machining is facilitated.

Description

Technical Field

[0001] This utility model relates to a positioning fixture structure for machining the end face of a cast pipe. Background Technology

[0002] When machining castings, especially those with side pipes, the traditional method involves circumferential positioning using locating pins on the end faces. However, the small diameter of these pins makes positioning inconvenient. Furthermore, the flanges on the casting's end faces (upper and / or lower) require a certain depth to be recessed when placed on the positioning table, making traditional positioning pins unsuitable for both placing and removing the casting from the table. Therefore, a positioning fixture for machining the end faces of casting pipes is needed. Utility Model Content

[0003] The purpose of this utility model is to provide a positioning fixture structure for machining the end face of a casting pipe. This fixture helps to install and position castings with pipes on the side, facilitating subsequent machining.

[0004] The technical solution of this utility model is as follows: a positioning fixture structure for machining the end face of a casting pipe, including a base, a casting placement positioning table is provided on the table surface of the base, a positioning mechanism is provided at the rear of the table surface of the base for cooperating with the pipe opening on the side wall of the casting and being able to swing up and down at a certain angle and extend and retract back and forth, and clamping mechanisms are provided on both sides of the base for pressing the side of the casting.

[0005] Furthermore, the casting placement and positioning platform is columnar, and the upper end surface of the casting placement and positioning platform is provided with a first annular step surface that is recessed downwards, and a second annular step surface that is recessed downwards is provided inside the first annular step surface.

[0006] Furthermore, a vertical shaft hole is provided in the middle of the casting placement and positioning platform.

[0007] Furthermore, the positioning mechanism includes a fixed base with a slot provided longitudinally on the fixed base. A swing block that extends out of the slot and is able to swing is rotatably connected to the slot via a transverse rotating shaft. A positioning column is provided in the swing block for cooperating with the pipe opening on the side wall of the casting and is able to elastically extend and retract back and forth.

[0008] Furthermore, the fixing base includes a fixing block whose lower part is fixedly connected to the base platform, and a groove is longitudinally provided on the upper part of the fixing block. A cover plate that covers the upper side of the groove and cooperates with the groove to form a slot is fixed on the upper end of the fixing block.

[0009] Furthermore, the swing block is provided with a longitudinal mounting cavity, the positioning post slides with the mounting cavity, a spring is installed between the rear end of the positioning post and the mounting cavity, and an anti-detachment structure is provided between the positioning post and the mounting cavity.

[0010] Furthermore, the anti-detachment structure includes guide limiting grooves provided on both sides of the mounting cavity and whose front ends do not protrude from the swing block, and both sides of the positioning column are provided with protrusions that cooperate with the guide limiting grooves.

[0011] Furthermore, there are gaps between the upper end face of the swing block and the top surface of the slot, and between the lower end face of the swing block and the bottom surface of the slot.

[0012] Furthermore, the front end of the positioning post is chamfered and has a forward-protruding protrusion for extending into the casting pipe opening.

[0013] Furthermore, the clamping mechanism includes a vertical hydraulic cylinder and a pressure block with its inner end used to press against the lower side of the casting. The upper end of the telescopic rod of the vertical hydraulic cylinder is hinged to the lower part of the outer end of the pressure block. A connecting rod is hinged to the middle of the pressure block, and the lower end of the connecting rod is hinged to the upper end of the seat of the vertical hydraulic cylinder.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. This fixture, by setting up positioning columns that can swing upwards and extend and retract elastically forwards and backwards, helps to install and position castings with pipes on the side on the casting placement positioning table, and at the same time facilitates the removal of castings after processing.

[0016] 2. A notch is provided on the lower inner end of the pressure block to better match the lower side of the gradually increasing pressure and complete the gradual clamping. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the pipe casting structure;

[0018] Figure 2 This is a schematic diagram (top view) of the structure of this utility model.

[0019] Figure 3 This is a side view of the present invention;

[0020] Figure 4 This is a schematic diagram of the pressing mechanism of this utility model;

[0021] Figure 5 For the present utility model Figure 2 AA section view;

[0022] Figure 6 For the present utility model Figure 2 BB cross-sectional view;

[0023] Figure 7 For the present utility model Figure 3 CC section view;

[0024] In the diagram: 1-Base 11-Recess 2-Casting placement and positioning platform 21-First annular step 22-Second annular step 23-Vertical shaft hole 3-Positioning mechanism 4-Pressure mechanism 31-Fixed seat 311-Slot 312-Horizontal rotating shaft 313-Fixed block 314-Cover plate 32-Swing block 321-Mounting cavity 322-Spring 323-Slot 324-Sealing plate 325-Guide limiting groove 33-Positioning post 331-Protrusion 332-Chamfer 333-Protrusion post 34-Gap 41-Vertical cylinder 42-Pressure block 421-Notch 422-Recess 423-Brass block 43-Connecting rod 5-Casting 51-Pipe opening 52-First boss surface 53-Second boss surface. Detailed Implementation

[0025] To make the above-mentioned features and advantages of this utility model more easily understood, specific embodiments are described below in conjunction with the accompanying drawings, but this utility model is not limited thereto.

[0026] refer to Figures 2 to 7

[0027] A positioning fixture structure for machining the end face of a cast pipe includes a base 1. A casting placement and positioning platform 2 is provided on the platform of the base. A positioning mechanism 3 is provided at the rear of the platform of the base, which is used to cooperate with the pipe opening 51 on the side wall of the casting 5 and can swing up and down at a certain angle and extend and retract back and forth. Clamping mechanisms 4 are provided on both sides of the base to press down the side of the casting. The positioning mechanism can swing up at a certain angle and extend and retract back and forth, thereby cooperating with the pipe opening on the side wall of the casting. Together with the casting placement and positioning platform and the clamping mechanism, the casting is positioned and clamped for subsequent machining.

[0028] In this embodiment, the casting placement and positioning platform is columnar. The upper end surface of the casting placement and positioning platform is provided with a first annular step surface 21 that is recessed downward to cooperate with the first boss surface 52 of the bottom surface of the casting. A second annular step surface 22 that is recessed downward to cooperate with the second boss surface 53 of the bottom surface of the casting is provided on the inner side of the first annular step surface, thereby completing the bottom surface positioning of the casting.

[0029] In this embodiment, in order to reduce the weight of the casting placement platform, a vertical shaft hole 23 is provided in the middle of the casting placement positioning platform.

[0030] In this embodiment, to locate the pipe opening on the side wall of the casting, the positioning mechanism includes a fixed base 31. A slot 311 is longitudinally provided on the fixed base. A swing block 32, extending out of the slot and capable of swinging, is rotatably connected to the slot via a transverse rotating shaft 312. A positioning post 33, capable of elastically extending and retracting back and forth, is provided within the swing block to engage with the pipe opening on the side wall of the casting. The extension and retraction of the positioning post and the upward swing of the swing block facilitate the installation and subsequent removal of the casting, while the positioning post restricts the circumferential rotation of the casting.

[0031] In this embodiment, in order to better form the slot, the fixing base includes a fixing block 313 whose lower part is fixedly connected to the base platform. The upper part of the fixing block is provided with a slot in the longitudinal direction. The upper end of the fixing block is fixed with a cover plate 314 that covers the upper side of the slot and cooperates with the slot to form the slot.

[0032] In this embodiment, in order to install the positioning post, the swing block is provided with a longitudinally arranged mounting cavity 321. The positioning post slides with the mounting cavity. A spring 322 is installed between the rear end of the positioning post and the mounting cavity. An anti-detachment structure is provided between the positioning post and the mounting cavity to prevent the positioning post from detaching from the swing block.

[0033] In this embodiment, in order to better process and form an installation cavity on the swing block, a channel 323 is longitudinally provided on the swing block, and a sealing plate 324 is fixed in the channel to form an installation cavity at the front of the channel.

[0034] In this embodiment, the anti-detachment structure includes guide limiting grooves 325 disposed on both sides of the mounting cavity and whose front ends do not protrude from the swing block, and both sides of the positioning column are provided with protrusions 331 that cooperate with the guide limiting grooves.

[0035] In this embodiment, to better enable the swing block to swing upward at a certain angle, there is a gap 34 between the upper end face of the swing block and the top surface of the slot, and between the lower end face of the swing block and the bottom surface of the slot. The upward swing angle of the swing block is within 10°.

[0036] In this embodiment, in order to better match the pipe opening of the casting, the front end of the positioning post is provided with a chamfer 332 and has a protruding post 333 for extending into the pipe opening of the casting. The protruding post extends into the pipe opening post and fits with the chamfer of the pipe opening through the chamfer.

[0037] In this embodiment, to clamp the casting after positioning, the clamping mechanism includes a vertical hydraulic cylinder 41 and a pressure block 42 whose inner end is used to press against the lower side of the casting. The upper end of the telescopic rod of the vertical hydraulic cylinder is hinged to the lower part of the outer end of the pressure block, and a connecting rod 43 is hinged to the middle of the pressure block. The lower end of the connecting rod is hinged to a fixing block installed on the inner side of the upper end of the housing of the vertical hydraulic cylinder. Thus, when the telescopic rod of the vertical hydraulic cylinder extends upward, it drives the connecting rod, causing the inner end of the connecting rod to press against the lower side of the casting.

[0038] In this embodiment, in order to better press down the lower side of the casting, the lower side of the inner end of the pressure block is provided with a notch 421 for pressing down on the lower side of the casting, and a recess 422 is provided near the outer end of the notch.

[0039] In this embodiment, in order to reduce damage to the casting, the bottom surface of the pressure block can be fixed with a brass block 423, and the notch and recess are provided on the brass block.

[0040] In this embodiment, recesses 11 are provided on both sides of the base, and the clamping mechanism is installed in the recesses.

[0041] In use, align the pipe opening of the casting with the protrusion of the positioning pin, and push it backward a certain distance. Utilizing the characteristic that the swing block can swing up and down at a certain angle, it facilitates the bottom of the casting to mate with the first and second annular stepped surfaces of the casting placement positioning platform. Simultaneously, after the bottom surface of the casting is installed on the casting placement positioning platform, the elastic force of the positioning pin pushing forward holds the pipe opening in place, completing the positioning of the casting. Finally, the clamping mechanism clamps the lower side of the casting to facilitate the machining of the upper surface of the casting. After machining is completed, the clamping mechanism is released, and the casting can be removed upwards.

[0042] If the terms "first" and "second" are used in the above description to define the components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of distinguishing the components in the description. Unless otherwise stated, the above terms have no special meaning.

[0043] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws) or a non-detachable fixed connection (e.g., riveting or welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0044] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0045] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0046] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A positioning jig structure for end face processing of a cast pipe, comprising a base, characterized by, The base is provided with a casting placing positioning table on the table top, and the rear part of the base is provided with a positioning mechanism capable of being matched with the pipe opening on the side wall of the casting and being swung up and down and being extended and retracted forward and backward.

2. The positioning jig structure for end face machining of a cast pipe according to claim 1, characterized by The casting placing positioning table is columnar, and the upper end face of the casting placing positioning table is provided with a first annular step face recessed downward, and the inner side of the first annular step face is provided with a second annular step face recessed downward.

3. The positioning jig structure for end face machining of a cast pipe according to claim 2, characterized in that, The middle part of the casting placing positioning table is provided with a vertical shaft hole.

4. The positioning jig structure for end face machining of a cast pipe according to claim 1, 2 or 3, characterized in that, The positioning mechanism comprises a fixed seat, a slot hole is longitudinally arranged on the fixed seat, a swing block capable of swinging and extending out of the slot hole is transversely connected to the slot hole through a transverse rotating shaft, and a positioning column capable of being matched with the pipe opening on the side wall of the casting and being elastically extended and retracted forward and backward is arranged in the swing block.

5. The positioning jig structure for end face machining of a cast pipe according to claim 4, characterized in that, The fixed seat comprises a fixed block fixedly connected with the base table top, a slot is longitudinally arranged on the upper part of the fixed block, and a cover plate is fixedly arranged on the upper end of the fixed block and covers the upper side of the slot to form the slot hole.

6. The positioning jig structure for end face machining of a cast pipe according to claim 4, characterized in that, A mounting cavity is longitudinally arranged on the swing block, the positioning column slides in the mounting cavity, a spring is arranged between the rear end of the positioning column and the mounting cavity, and an anti-falling structure is arranged between the positioning column and the mounting cavity.

7. The positioning jig structure for end surface machining of a cast pipe according to claim 6, characterized in that, The anti-falling structure comprises a guide limiting groove arranged on the two side walls of the mounting cavity and not penetrating the swing block at the front end, and the two side parts of the positioning column are provided with convex parts matched with the guide limiting groove.

8. The positioning jig structure for end face machining of a cast pipe according to claim 4, characterized in that, The upper end face of the swing block and the top face of the slot hole and the lower end face of the swing block and the bottom face of the slot hole all have gaps.

9. The positioning jig structure for end face machining of a cast pipe according to claim 4, characterized in that, The front end of the positioning column is provided with a chamfer and a convex column protruding forward for extending into the pipe opening of the casting.

10. The positioning tool structure for end face machining of a cast pipe according to claim 1, 2, 3, 5, 6, 7, 8 or 9, characterized by, The pressing mechanism comprises a vertical oil cylinder and a pressing block used for pressing the lower side of the casting, the upper end of the telescopic rod of the vertical oil cylinder is hingedly connected with the outer side end of the lower part of the pressing block, a connecting rod is hingedly connected to the middle part of the pressing block, and the lower end of the connecting rod is hingedly connected with the upper end of the seat shell of the vertical oil cylinder.

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