Positioning device for precision casting machining

Abstract

The application discloses a positioning device for precision casting machining applied to the technical field of casting machining, and the positioning device is characterized in that: the to-be-machined casting is sleeved outside the central shaft pile, the to-be-machined casting is rotated on the rotating roller, the horizontal angle of the to-be-machined casting is positioned and adjusted, then the inner clamping block and the outer clamping block are used to clamp the inner wall and the outer wall of the to-be-machined casting respectively, the clamping and fixing of the to-be-machined casting is realized, the overturning platform is pushed to move by the overturning cylinder, the vertical angle of the to-be-machined casting is accurately positioned, the two movable pads are driven to move in a synchronous and opposite direction by the threaded shaft, the movable pad extrudes the buffer spring, and then the filling pad is pushed to move towards the fixed pad, the position of the movable pad is emptied, space is provided for the protruding part on the outer wall of the to-be-machined casting, the to-be-machined casting with the protruding part is clamped and fixed by the outer clamping block, and the positioning accuracy of the to-be-machined casting in the machining process is improved.

Description

Technical Field

[0001] This invention relates to the field of casting processing technology, and in particular to a positioning device for precision casting processing. Background Technology

[0002] Castings are metal shaped objects obtained by various casting methods. After casting, castings have various defects and require precision machining to compensate for these defects. For example, Chinese Patent CN114536020B discloses a flash removal device for fire-fighting equipment casting production. During precision machining of castings, a positioning device is needed to simply fix the casting and adjust its position and angle. For example, Chinese Patent CN219787450U discloses a casting machining positioning device. However, during the positioning and fixing process of castings, the functional components of the casting itself can easily affect the positioning and fixing. For example, the port on the valve body casting used to install the valve stem and the port used for pipe connection affect the stability of the positioning and fixing of the casting, and thus affect the accuracy of precision machining of the casting. Summary of the Invention

[0003] The core of this invention lies in providing space for the protruding parts on the outer wall of the casting to be processed, thereby reducing the impact of the protruding parts on the positioning and fixing of the casting, and solving the problem of the functional components on the casting itself affecting the positioning stability in the prior art.

[0004] To solve the above problems, the present invention adopts the following technical solution.

[0005] A positioning device for precision casting machining includes a base, a tilting platform rotatably connected to the top of one end of the base, a central axis post fixedly connected to the middle of the tilting platform, a casting to be machined being sleeved on the outside of the central axis post, rotating rollers symmetrically distributed about the top of the tilting platform about the central axis post, the rotating rollers rollingly contacting the bottom end of the casting to be machined, a side post fixedly connected to one end of the tilting platform, and an inner clamping block and an outer clamping block movably connected to the middle of the central axis post and the side post respectively, the inner clamping block being used to clamp the inner wall of the casting to be machined, and the outer clamping block being used to clamp the outer wall of the casting to be machined; The outer clamp block has multiple vertically parallel grooves evenly distributed in the middle. The grooves are rotatably connected to threaded shafts. Both ends of the threaded shafts are threaded to movable pads, and the thread directions of the two ends of the threaded shafts are symmetrical. Fixed pads are fixedly connected to the top and bottom of the outer clamp block. A filler pad is provided between the movable pad and the fixed pad. The movable pad, fixed pad, and filler pad are all in contact with the outer wall of the casting to be processed. The filler pad is slidably connected to the groove, and a buffer spring is fixedly connected between the filler pad and the movable pad and the fixed pad.

[0006] Furthermore, a tilting cylinder is rotatably connected to the end of the device base away from the tilting platform, and the end of the tilting platform away from the side stake is rotatably connected to the output end of the tilting cylinder.

[0007] Furthermore, gear shafts are rotatably connected to both ends of the central pile and the side piles, and toothed rods are fixedly connected to the exterior of both the inner clamp block and the outer clamp block, with the toothed rods meshing with the gear shafts.

[0008] Furthermore, a rotating arm is fixedly connected to the bottom end of the gear shaft, and a telescopic cylinder is hinged between two adjacent rotating arms.

[0009] Optionally, both ends of the outer clamp block are provided with engagement grooves, and clamping components are bolted to the top and bottom of the outer clamp block.

[0010] Furthermore, a merging component is provided at the end of the two clamping components away from the outer clamping block. Both ends of the merging component are rotatably connected to clamping screws, which are threadedly connected to the clamping components.

[0011] Furthermore, an angle groove is provided in the middle of the merging component, an angle block is slidably connected inside the angle groove, a telescopic threaded rod is threadedly connected in the middle of the angle block, and a clamping component is rotatably connected to one end of the telescopic threaded rod near the engaging groove.

[0012] Compared with the prior art, the advantages of this invention are: (1) The present invention adjusts the threaded shaft by rotating it so that the threaded shaft drives two movable pads to move synchronously in opposite directions. The movable pads squeeze the buffer spring, thereby pushing the filling pad to move towards the fixed pad, freeing up the original position of the movable pad, thus providing space for the protruding parts on the outer wall of the casting to be processed, making it easier for the outer clamping block to clamp and fix the casting with the protruding parts, and making it easier for the casting to be processed to be precisely positioned during the processing.

[0013] (2) In this invention, the casting to be processed is placed outside the central shaft pile, and the casting to be processed is rotated by a rotating roller to achieve precise positioning of the horizontal angle of the casting to be processed. Then, the inner and outer clamping blocks are used to clamp the inner and outer walls of the casting to be processed to achieve clamping and fixing of the casting to be processed. Subsequently, the flipping platform is driven by a flipping cylinder to perform a flipping motion to achieve precise positioning of the vertical angle of the casting to be processed. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a top-view perspective view of the overall structure of the present invention; Figure 3 This is a top-view three-dimensional structural diagram of the central pile and the side piles of the present invention; Figure 4This is a three-dimensional demonstration diagram of the flipping motion of the flipping platform of the present invention; Figure 5 This is a three-dimensional cross-sectional view of the axial pile and the side pile of the present invention; Figure 6 This is a bottom-view perspective structural diagram of the rotating arm and telescopic cylinder of the present invention; Figure 7 This is a three-dimensional structural diagram of the external clamping block of the present invention; Figure 8 This is a three-dimensional structural diagram of the movable pad, fixed pad, and filling pad of the present invention; Figure 9 This is a demonstration diagram showing how the movable pad pushes the filling pad towards the fixed pad according to the present invention; Figure 10 This is a three-dimensional structural diagram of the clamping component and merging component of the present invention for fixing the casting to be processed; Figure 11 This is a perspective structural diagram of the clamping component and the merging component of the present invention; Figure 12 This is a cross-sectional perspective view of the combined components of the present invention; Figure 13 This is a demonstration diagram of the clamping assembly and engaging groove of the present invention clamping the tubular component on the casting to be processed.

[0015] Explanation of the labels in the diagram: 1. Device base, 101. Tilting platform, 102. Central shaft, 103. Casting to be processed, 104. Rotating roller, 105. Side pile, 106. Inner clamping block, 107. Outer clamping block, 108. Tilting cylinder, 109. Gear shaft, 110. Toothed rod, 111. Rotating arm, 112. Telescopic cylinder, 2. Slide groove, 201. Threaded shaft, 202. Movable pad, 203. Fixed pad, 204. Filling pad, 205. Buffer spring, 3. Engaging groove, 301. Clamping assembly, 302. Merging assembly, 303. Clamping screw, 304. Angle groove, 305. Angle block, 306. Telescopic threaded rod, 307. Pressing assembly. Detailed Implementation

[0016] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0017] First implementation method: Please see Figures 1 to 4A positioning device for precision casting machining includes a base 1, a tilting platform 101 rotatably connected to the top of one end of the base 1, a central axis post 102 fixedly connected to the middle of the tilting platform 101, a casting 103 to be machined being sleeved on the outside of the central axis post 102, and rotating rollers 104 symmetrically distributed about the top of the tilting platform 101 about the central axis post 102. The rotating rollers 104 roll in contact with the bottom end of the casting 103, and the casting 103 is sleeved on the outside of the central axis post 102. By rolling in contact with the rotating rollers 104, the sleeve angle of the casting 103 on the central axis post 102 can be adjusted, facilitating precise positioning of the horizontal angle of the casting 103. A side post 105 is fixedly connected to one end of the tilting platform 101. The central pile 102 and the side pile 105 are respectively movably connected to an inner clamping block 106 and an outer clamping block 107. The inner clamping block 106 is used to clamp the inner wall of the casting 103 to be processed, and the outer clamping block 107 is used to clamp the outer wall of the casting 103 to be processed. The inner clamping block 106 and the outer clamping block 107 are used to clamp the inner wall and the outer wall of the casting 103 to be processed, respectively, to achieve the clamping and fixing of the casting 103 to be processed. The end of the device base 1 away from the flipping platform 101 is rotatably connected to a flipping cylinder 108. The end of the flipping platform 101 away from the side pile 105 is rotatably connected to the output end of the flipping cylinder 108. The flipping cylinder 108 is used to push the flipping platform 101 to flip, which facilitates the precise positioning of the vertical angle of the casting 103 to be processed. During the precision machining of the casting, the casting 103 to be machined is placed on the outside of the central shaft 102. The casting 103 to be machined is rotated by the rotating roller 104 to achieve precise positioning of the horizontal angle of the casting 103 to be machined. Then, the inner clamping block 106 and the outer clamping block 107 are used to clamp the inner wall and the outer wall of the casting 103 to be machined, respectively, to achieve clamping and fixing of the casting 103 to be machined. Subsequently, the flipping cylinder 108 pushes the flipping platform 101 to perform a flipping motion to achieve precise positioning of the vertical angle of the casting 103 to be machined.

[0018] Please see Figure 5 and Figure 6 Gear shafts 109 are rotatably connected to both ends of the central pile 102 and the side pile 105. Toothed rods 110 are fixedly connected to the outside of the inner clamping block 106 and the outer clamping block 107. The toothed rods 110 mesh with the gear shafts 109. The meshing of the two gear shafts 109 drives the toothed rods 110, thereby pushing the inner clamping block 106 and the outer clamping block 107 to perform telescopic movements, so that the inner clamping block 106 and the outer clamping block 107 can clamp the casting 103 to be processed. A rotating arm 111 is fixedly connected to the bottom end of the gear shaft 109. A telescopic cylinder 112 is hinged between two adjacent rotating arms 111. The telescopic cylinder 112 pushes the rotating arm 111, so that the rotating arm 111 drives the gear shaft 109 to rotate. When the inner clamping block 106 and the outer clamping block 107 clamp the casting 103 to be processed, the telescopic cylinder 112 pushes the rotating arm 111, causing the gear shaft 109 to rotate. This enables the two gear shafts 109 to mesh and drive the toothed rod 110, pushing the inner clamping block 106 towards the inner wall of the casting 103 to be processed and the outer clamping block 107 towards the outer wall of the casting 103 to be processed, effectively improving the clamping stability of the casting 103 to be processed.

[0019] Please see Figures 7 to 9 The outer clamp block 107 has multiple vertically parallel grooves 2 evenly distributed in the middle. A threaded shaft 201 is rotatably connected inside each groove 2. Both ends of the threaded shaft 201 are threadedly connected to movable pads 202, and the threads at both ends of the threaded shaft 201 are symmetrically arranged. This allows the two movable pads 202 to move synchronously towards or away from each other when the threaded shaft 201 rotates. Fixed pads 203 are fixedly connected to the top and bottom of the outer clamp block 107. A filling pad 204 is provided between the movable pads 202 and the fixed pads 203. The movable pads 202, fixed pads 203, and filling pads 204 all contact the outer wall of the casting 103 to be processed. The movable pads 202 and fixed pads 204... 203 and filling pad 204 contact the casting to be processed 103, so that the outer clamping block 107 can clamp and fix the casting to be processed 103. The filling pad 204 is slidably connected to the slide groove 2, and buffer springs 205 are fixedly connected between the filling pad 204, the movable pad 202 and the fixed pad 203. When the threaded shaft 201 drives the movable pad 202 to move synchronously in opposite directions, the movable pad 202 squeezes the buffer spring 205 and pushes the filling pad 204 to move toward the fixed pad 203, freeing up the original position of the movable pad 202, thereby providing space for the protruding parts on the outer wall of the casting to be processed 103. Taking the valve body casting as an example, it is convenient for the outer clamping block 107 to clamp the valve stem connection part on the valve body casting. After the casting 103 to be processed is fitted onto the central shaft 102 at an adjusted angle, the clamping position of the outer clamping block 107 is at the part of the outer wall of the casting 103 with protruding parts. By rotating the adjusting threaded shaft 201, the threaded shaft 201 drives the two movable pads 202 to move synchronously in opposite directions. The movable pads 202 compress the buffer spring 205, thereby pushing the filling pad 204 towards the fixed pad 203, freeing up the original position of the movable pad 202. For specific details, please refer to the attached document. Figure 9 As shown, this provides space for the protruding parts on the outer wall of the casting 103 to be processed, making it easier for the outer clamping block 107 to clamp the valve stem connection on the valve body casting, thereby effectively improving the clamping stability of the outer clamping block 107 on the valve stem connection on the valve body casting and facilitating the precise positioning of the casting 103 to be processed during the processing.

[0020] Second implementation method: Compared to the first embodiment, the main additions are a clamping component 301, a merging component 302, and a pressing component 307. The specific additions are as follows, while the remaining structures are the same as in the first embodiment.

[0021] Please see Figures 10 to 13 Both ends of the outer clamping block 107 are provided with engaging grooves 3. Clamping components 301 are bolted to the top and bottom of the outer clamping block 107. A merging component 302 is provided at the end of each clamping component 301 away from the outer clamping block 107. Clamping screws 303 are rotatably connected to both ends of the merging component 302. The clamping screws 303 are threadedly connected to the clamping components 301. When the external tubular component of the casting 103 to be processed is rotated and adjusted to the position of the outer clamping block 107 (taking a valve body casting as an example, the valve body casting has a pipe connection port), the external tubular component of the casting 103 to be processed is rotated and adjusted into the engaging grooves 3. Clamping components 301 are installed at the top and bottom of the outer clamping block 107. The two clamping components 301 are connected to the external tubular component of the casting 103 to be processed. The tubular component is clamped from the top and bottom. The merging component 302 combines the two clamping components 301 into one, which effectively improves the clamping stability of the clamping component 301 on the external tubular component of the casting 103 to be processed. An angle groove 304 is provided in the middle of the merging component 302. An angle block 305 is slidably connected inside the angle groove 304. A telescopic threaded rod 306 is threadedly connected in the middle of the angle block 305. A pressing component 307 is rotatably connected to one end of the telescopic threaded rod 306 near the engaging groove 3. By rotating the telescopic threaded rod 306, the pressing component 307 is pushed towards the tubular component outside the casting 103 to be processed, thereby pressing and fixing the external tubular component of the casting 103 to be processed, which is smaller than the preset size of the clamping component 301. When the external tubular component of the casting 103 to be processed is rotated and adjusted to the position of the external clamping block 107, taking the valve body casting as an example, the valve body casting is provided with a pipe connection port. The external tubular component of the casting 103 to be processed is rotated and adjusted into the engaging groove 3. Clamping components 301 are installed on the top and bottom of the external clamping block 107. The two clamping components 301 clamp the external tubular component of the casting 103 to be processed from above and below. The merging component 302 merges the two clamping components 301 into one, effectively improving the clamping effect of the clamping components 301 on the external tubular component of the casting 103 to be processed. To improve the clamping stability of the casting 103, when the diameter of the outer tubular component is smaller than the preset size of the clamping assembly 301, the angle block 305 is installed into the angle groove 304, and the telescopic threaded rod 306 is rotated to push the clamping assembly 307 toward the outer tubular component of the casting 103, clamping the outer tubular component of the casting 103 between the clamping assembly 307 and the engaging groove 3 or between the clamping assembly 307 and the clamping assembly 301, thereby further improving the clamping stability of the casting 103.

[0022] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A positioning device for precision casting machining, comprising a device base (1), characterized in that: A flipping platform (101) is rotatably connected to the top of one end of the device base (1). A central axis pile (102) is fixedly connected to the middle of the flipping platform (101). A casting to be processed (103) is sleeved on the outside of the central axis pile (102). Rotating rollers (104) are symmetrically distributed on the top of the flipping platform (101) about the central axis pile (102). The rotating rollers (104) roll in contact with the bottom end of the casting to be processed (103). A side pile (105) is fixedly connected to one end of the flipping platform (101). An inner clamping block (106) and an outer clamping block (107) are movably connected to the middle of the central axis pile (102) and the side pile (105), respectively. The inner clamping block (106) is used to clamp the inner wall of the casting to be processed (103), and the outer clamping block (107) is used to clamp the outer wall of the casting to be processed (103). The outer clamp block (107) has a plurality of vertically parallel sliding grooves (2) evenly distributed in the middle. The sliding groove (2) is rotatably connected to a threaded shaft (201). Both ends of the threaded shaft (201) are threadedly connected to movable pads (202), and the thread directions of the two ends of the threaded shaft (201) are symmetrically arranged. The top and bottom of the outer clamp block (107) are fixedly connected to fixed pads (203). A filling pad (204) is provided between the movable pad (202) and the fixed pad (203). The movable pad (202), the fixed pad (203) and the filling pad (204) are all in contact with the outer wall of the casting (103) to be processed. The filling pad (204) is slidably connected to the sliding groove (2), and a buffer spring (205) is fixedly connected between the filling pad (204) and the movable pad (202) and the fixed pad (203).

2. The positioning device for precision casting machining according to claim 1, characterized in that: The device base (1) is rotatably connected to a tilting cylinder (108) at one end away from the tilting platform (101), and the tilting platform (101) is rotatably connected to the output end of the tilting cylinder (108) at one end away from the side stake (105).

3. The positioning device for precision casting machining according to claim 1, characterized in that: The inner ends of the central pile (102) and the side pile (105) are rotatably connected to gear shafts (109), and the outer sides of the inner clamp block (106) and the outer clamp block (107) are fixedly connected to toothed rods (110), which mesh with the gear shafts (109).

4. A positioning device for precision casting machining according to claim 3, characterized in that: A rotating arm (111) is fixedly connected to the bottom end of the gear shaft (109), and a telescopic cylinder (112) is hinged between two adjacent rotating arms (111).

5. A positioning device for precision casting machining according to claim 1, characterized in that: Both ends of the outer clamp block (107) are provided with engagement grooves (3), and the top and bottom of the outer clamp block (107) are bolted with clamping components (301).

6. A positioning device for precision casting machining according to claim 5, characterized in that: Two clamping assemblies (301) are provided with a merging assembly (302) at one end away from the outer clamping block (107). Both ends of the merging assembly (302) are rotatably connected with clamping screws (303), and the clamping screws (303) are threadedly connected to the clamping assembly (301).

7. A positioning device for precision casting machining according to claim 6, characterized in that: An angle groove (304) is provided in the middle of the merging component (302). An angle block (305) is slidably connected inside the angle groove (304). A telescopic threaded rod (306) is threadedly connected in the middle of the angle block (305). A pressing component (307) is rotatably connected to one end of the telescopic threaded rod (306) near the engaging groove (3).

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