A jig and method for machining a curved core-drawing mold

Abstract

This invention discloses a fixture and method for machining curved cores, relating to the field of cutting processing technology. It includes a first fixture and a second fixture for different machining processes. The first fixture has a positioning table, and the workpiece has a hollowed-out portion. The positioning table abuts against the side wall of the hollowed-out portion for positioning. The first fixture has a clamping plate that presses against the outer wall of the first-stage part. The second fixture includes a mounting base and a rotatable second base plate. The rotatable second base plate simulates the fourth axis of a machine tool, saving equipment costs. The second base plate has several pressure blocks, the mounting base has pin holes, and the second base plate has positioning pins that can be inserted into the pin holes. The positioning pins are inserted into the pin holes to fix the angle of the second base plate, facilitating operation. The machining method includes: machining the blank into the first-stage part, flipping it over to machine the second-stage part, and machining the arc-shaped core and cooling water channels using the second fixture. All these processes can be completed using a three-axis machining center, effectively saving equipment costs.

Description

Technical Field

[0001] This invention relates to the field of cutting and machining technology, and in particular to a fixture and method for machining curved core-pulling molds. Background Technology

[0002] Currently, three-axis machining centers are widely used in CNC cutting. As the industry continues to develop, four-axis and five-axis machining centers are also constantly being developed. However, for some small-scale processing plants, or for a small number of prototype parts, such as core-pulling molds with arc-shaped features in casting molds, investing in four-axis or five-axis machining centers can certainly improve quality and efficiency, but it requires high equipment costs and has low utilization and low economic benefits. Summary of the Invention

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a fixture and method for processing bending core-pulling molds, so as to achieve a low-cost processing process.

[0004] According to an embodiment of a first aspect of the present invention, a jig for processing a bent core-pulling die is provided for processing a workpiece, the workpiece comprising a first-stage part, a second-stage part, and a finished product in different processes, comprising:

[0005] A first fixture for holding a first stage part, the first fixture having a first base plate, the first base plate having a positioning platform, the first stage part having a hollow part, the positioning platform abutting against the side wall of the hollow part to achieve positioning, the first fixture having a clamping plate opposite to the positioning platform, the clamping plate pressing against the outer side wall of the first stage part;

[0006] The second clamp for holding the second stage part includes a mounting base and a second base plate that rotates about a horizontally arranged axis. The second base plate is perpendicular to the horizontal plane and rotatably connected to the mounting base. The second stage part has a base. The second base plate is provided with a plurality of pressure blocks that press against the base. The mounting base is provided with pin holes. The second base plate is provided with positioning pins that can be inserted into the pin holes.

[0007] The fixture for processing curved core-pulling molds according to the first aspect of the present invention has at least the following beneficial effects: This embodiment is used to process workpieces, which include a first-stage part, a second-stage part, and a finished product in different processes. This embodiment is provided with a first fixture for clamping the first-stage part and a second fixture for clamping the second-stage part. The first fixture has a first base plate with a positioning platform. The first-stage part has a hollow portion, and the positioning platform abuts against the side wall of the hollow portion to achieve positioning. The first fixture has a clamping plate opposite to the positioning platform, which presses against the outer side wall of the first-stage part, so that the first-stage part is pressed against the positioning platform to achieve clamping and fixation. The second fixture includes a mounting base and a second base plate that rotates about a horizontally arranged axis. The second base plate is perpendicular to the horizontal plane and rotatably connected to the mounting base. The rotatable second base plate simulates the fourth axis of a machine tool, and the angle can be adjusted to achieve complete processing, eliminating the need for a four-axis or five-axis machining center and saving equipment costs. The second-stage component has a base, and the second base plate has several pressure blocks that press against the base. The mounting base has pin holes, and the second base plate has positioning pins that can be inserted into the pin holes. The angle of the second base plate is fixed by inserting the positioning pins into the pin holes, which facilitates operation.

[0008] According to a first aspect of the present invention, a jig for processing a curved core-pulling mold has a first surface and a second surface that are perpendicular to each other on the side wall of the hollow part, and the side wall of the positioning table abuts against the first surface and the second surface. At the same time, a first side pressing block is provided on the first base plate to press against the outer side wall of the first stage part that is opposite to the second surface.

[0009] According to a first aspect of the present invention, a jig for processing a curved core-pulling mold has flanges on both sides of a base along the width direction, the flanges having arc-shaped outer walls, a centering portion provided on a second base plate, the centering portion abutting against the outer wall of any flange, and an arc-shaped clamping block pressed against the flange on the second base plate, the arc-shaped clamping block and the centering portion being provided on both sides of the base.

[0010] According to a first aspect of the present invention, a jig for processing a bending core-pulling mold has a clamping surface on the upper part of the base and a flat clamping block that presses against the clamping surface on the second base plate.

[0011] According to the first aspect of the present invention, a jig for processing a bending core-pulling mold is provided on the side of the second base plate away from the second stage part, and the mounting base is provided with a bearing for inserting the rotating shaft. After the second base plate is rotated by a preset angle, it is fixed to the mounting base by bolt connection.

[0012] According to a first aspect of the present invention, a jig for processing a curved core-pulling mold, the finished product includes an interconnected arc-shaped core and a base, wherein the arc-shaped core is provided with cooling water channels.

[0013] According to an embodiment of a second aspect of the present invention, a processing method is provided, comprising a jig for processing a curved core-pulling mold, and further comprising a workpiece, a first-stage part, a second-stage part, a finished product, a first fixture, and a second fixture. The second-stage part is provided with an arc-shaped core and a base, and the arc-shaped core has cooling water channels.

[0014] S1, use a three-axis machining center to process the blank into the first stage part;

[0015] S2, flip the first-stage part and fix it on the first fixture to process the second-stage part;

[0016] S3, Fix the second-stage part onto the second fixture and machine the arc-shaped core;

[0017] S4. Rotate the second base plate to the preset angle to machine cooling water channels on the arc-shaped core and produce the finished product.

[0018] The processing method described in the second aspect of this invention has at least the following beneficial effects:

[0019] S1, use a three-axis machining center to process the blank into the first stage part;

[0020] S2, flip the first stage part and fix it on the first fixture to process the second stage part, which is then used to process the other side of the workpiece after being flipped.

[0021] S3: Fix the second-stage part onto the second fixture to machine the arc-shaped core. The rotatable second fixture can change the machining angle, simulating the function of a four-axis machining center and improving machining flexibility.

[0022] S4. Rotate the second base plate to the preset angle to machine cooling water channels on the arc-shaped core and produce the finished product.

[0023] According to a processing method of the second aspect of the present invention, the cooling water channel includes a first section and a second section, with an included angle between the first section and the second section to form a curved cooling water channel. In step S4, after the first section is processed, the second base plate is rotated to a preset angle, and then the second section is processed.

[0024] According to a processing method of the second aspect of the present invention, the first segment and the second segment are respectively provided with at least two connecting pipes, and the arc-shaped core is also provided with a connecting pipe, which connects two adjacent first segments. In step S3, the connecting pipe is pre-processed.

[0025] According to a processing method of the second aspect of the present invention, a general-purpose fixture is used to hold the blank in step S1, and a general-purpose fixture is used to hold the first-stage part in step S2.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0028] Figure 1 This is an isometric view of the first fixture in an embodiment of the present invention;

[0029] Figure 2 This is an isometric view of the first-stage part in an embodiment of the present invention;

[0030] Figure 3 This is an isometric view of the second-stage part in an embodiment of the present invention;

[0031] Figure 4 This is an isometric view of the finished product in an embodiment of the present invention;

[0032] Figure 5 This is an isometric view of the first fixture clamping the first stage part in an embodiment of the present invention;

[0033] Figure 6 This is an isometric view of the second fixture clamping the second-stage part in an embodiment of the present invention;

[0034] Figure 7 This is a front view of the second fixture clamping the second-stage part in an embodiment of the present invention;

[0035] Figure 8 This is a cross-sectional view of the second fixture clamping the second-stage part in an embodiment of the present invention;

[0036] Figure 9 This is a cross-sectional view of the second base plate rotating at a first angle to process the first segment in the second fixture of this embodiment of the invention;

[0037] Figure 10 This is a cross-sectional view of the second base plate rotating at a second angle to process the second segment in the second fixture of this embodiment of the invention;

[0038] Figure 11 This is a cross-sectional view of the machining mating part of the second base plate rotating at the third angle in the second fixture of the present invention.

[0039] Figure label:

[0040] First stage part 10; Second stage part 11; Finished product 12; Hollowed-out part 13; First surface 14; Second surface 15; Base 16; Flange 17; Clamping surface 18; Arc-shaped core 19; First section 20; Second section 21; Connecting pipe 22; Base plate 23; Mating part 24;

[0041] First clamp 100; First base plate 101; Positioning platform 102; Clamping plate 103; First side pressure block 104;

[0042] Second clamp 110; mounting base 111; second base plate 112; rotating shaft 113; centering part 114; positioning post 116; arc-shaped clamping block 117; flat clamping block 118; bearing 119; first pressure block 120; second pressure block 121; reference surface 122. Detailed Implementation

[0043] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0044] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0045] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0046] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0047] Reference Figures 1 to 11 An embodiment of the first aspect of the present invention provides a fixture for processing curved cores, used to process workpieces, the workpieces including a first-stage part 10, a second-stage part 11, and a finished product 12 in different processes, as shown below. Figures 2 to 4 The first stage part 10 is made by milling using a block blank. One side of the first stage part 10 has a base plate 23. The second stage part 11 is further processed to form the local features of the arc-shaped core 19 based on the first stage part 10, and after further processing, it forms the finished product 12.

[0048] This embodiment includes a first clamp 100 for clamping the first stage part 10 and a second clamp 110 for clamping the second stage part 11. The first clamp 100 has a first base plate 101, and the first base plate 101 has a positioning platform 102. The first stage part 10 has a hollow portion 13. The positioning platform 102 abuts against the side wall of the hollow portion 13 to achieve positioning. Optionally, the side wall of the hollow portion 13 has a first surface 14 and a second surface 15 that are perpendicular to each other. The second surface 15 is located in the middle of the hollow portion 13. The positioning platform 102... The sidewalls abut against the first surface 14 and the second surface 15 to position the first stage part 10. Simultaneously, the first base plate 101 has a first side pressure block 104 that presses against the outer sidewall of the first stage part 10 opposite to the second surface 15. The first side pressure block 104 is fixed to the sidewall of the first base plate 101 by bolts. When the first side pressure block 104 is securely installed, it presses against the first stage part 10, causing the second surface 15 to press against the positioning table 102, thus clamping the first stage part 10. Optionally, the first clamp 100 has a clamping plate 103 opposite to the positioning table 102. The clamping plate 103 presses against the outer sidewall of the first stage part 10, causing the first surface 14 of the first stage part 10 to press against the positioning table 102, thus clamping and fixing it.

[0049] The second fixture 110 includes a mounting base 111 and a second base plate 112 that rotates about a horizontally oriented axis. The second base plate 112 is perpendicular to the horizontal plane and rotatably connected to the mounting base 111. The rotatable second base plate 112 simulates the fourth axis of a machine tool, and its angle can be adjusted to achieve complete machining, eliminating the need for a four-axis or five-axis machining center and saving equipment costs. The second-stage part 11 has a base 16, and the second base plate 112 is provided with several pressure blocks that press against the base 16. The mounting base 111 is provided with pin holes, and the second base plate 112 is provided with positioning pins 116 that can be inserted into the pin holes. The angle of the second base plate 112 is fixed by inserting the positioning pins 116 into the pin holes, which facilitates operation.

[0050] Reference Figure 6The base 16 has flanges 17 on both sides along its width direction. Each flange 17 has an arc-shaped outer wall. A centering portion 114 is provided on the second base plate 112, abutting against the outer wall of either flange 17. Simultaneously, an arc-shaped clamping block 117 is provided on the second base plate 112, pressing against the flange 17. The arc-shaped clamping block 117 and the centering portion 114 are respectively located on both sides of the base 16. Optionally, the centering portion 114 abuts against the flange 17 on the inner side of the arc of the base 16 to position the base 16. On the other hand, the arc-shaped clamping block 117 is located on the outer side of the arc of the base 16, used to fix the other side of the base 16. Optionally, the upper part of the base 16 is provided with a clamping surface 18, and the second base plate 112 is provided with a flat clamping block 118 that presses against the clamping surface 18. The flat clamping block 118 is connected to the base 16 by bolts to further fix the second stage part 11.

[0051] Reference Figure 8 A rotating shaft 113 is provided on the side of the second base plate 112 away from the second stage part 11. The mounting base 111 is provided with a bearing 119 for inserting the rotating shaft 113. After the second base plate 112 is rotated to a preset angle, it is fixed to the mounting base 111 by bolt connection. No linkage machining is required, the device is simple and can save equipment costs. Optionally, the finished product 12 includes an arc-shaped core 19 and a base 16 connected to each other. The arc-shaped core 19 is a curved part and has cooling water channels inside. Optionally, the cooling water channels include a first section 20 and a second section 21. The first section 20 and the second section 21 have an included angle and are interconnected to form a curved cooling water channel. The cooling water channel runs through the arc-shaped core 19. Further, the first section 20 and the second section 21 are each provided with at least two channels. The arc-shaped core 19 is also provided with a connecting pipe 22. The connecting pipe 22 connects two adjacent first sections 20 to realize the circulation of cooling water on the arc-shaped core 19.

[0052] On the other hand, an embodiment of the second aspect of the present invention provides a processing method, wherein the steps include:

[0053] S1. The blank is machined into the first stage part 10 using a three-axis machining center. Optionally, a vertical machining center is used for machining in this application. The blank is a square metal part. At the same time, a general-purpose jig is used to hold the blank for the first stage of machining to form the first stage part 10. It is understood that the bottom of the first stage part 10 has a base plate 23, which is the part held by the general-purpose jig.

[0054] S2, flip the first stage part 10 and fix it on the first fixture 100 to process the second stage part 11. After flipping, it is used to process the other side of the workpiece. Optionally, this step is to remove the base plate 23 in the first stage part 10 to form half of the base 16 and the arc-shaped core 19, thereby forming the second stage part 11.

[0055] S3, the second-stage part 11 is fixedly mounted on the second fixture 110, and the arc-shaped core 19 is machined. The rotatable second fixture 110 can change the machining angle, simulating the function of a four-axis machining center and improving machining flexibility. Optionally, the second fixture 110 clamps the base 16 for further machining of the arc-shaped core 19. (Refer to...) Figures 9 to 11 In the process of machining the second-stage part 11 into the finished product 12, the second base plate 112 in the second fixture 110 needs to be deflected by the first angle, the second angle and the third angle in sequence.

[0056] First, refer to Figure 6 When machining the second-stage part 11, the second base plate 112 is first adjusted to the first position. The second base plate 112 has a reference surface 122. Positioning of the second base plate 112 is achieved by adjusting the horizontal or vertical orientation of the reference surface 122. Therefore, in the first position, the reference surface 122 is perpendicular to the horizontal plane. Optionally, a micrometer that presses against the reference surface 122 can be used to adjust the horizontal or vertical orientation of the reference surface 122 using the spindle of a machining center. After adjustment, the second base plate 112 is fixed with bolts. In this machining step, the blank material on the arc-shaped core 19 is removed by milling, forming the upper part of the arc-shaped surface on the other side of the arc-shaped core 19.

[0057] Secondly, after processing is completed in the first position, the second base plate 112 rotates 90 degrees clockwise to reach the first angle, and further processes the arc-shaped core 19 to produce the remaining arc-shaped core 19, thus achieving the final forming of the arc-shaped core 19. Optionally, the end of the arc-shaped core 19 has a recessed mating part 24, which is processed by the second base plate 112 in the second position.

[0058] S4. Rotate the second base plate 112 to a preset angle, i.e., rotate the second base plate 112 to a second angle, and process cooling water channels on the arc-shaped core 19 to produce the finished product 12. Since the second base plate 112 is provided with positioning posts 116, which are inserted into the mounting base 111 to fix the deflection angle of the second base plate 112, and are fixed by bolts, the operation is convenient and does not require manual angle adjustment. Optionally, in this step, after processing the first segment 20, rotate the second base plate 112 to a preset angle, i.e., a third angle, and then process the second segment 21. The drill bit enters the arc-shaped core 19 from the end near the base 16, so that the second segment 21 connects with the first segment 20 to form a cooling water channel. Optionally, the first segment 20 and the second segment 21 each have at least two channels.

[0059] Optionally, the arc-shaped core 19 is also provided with a connecting pipe 22, which connects two adjacent first segments 20. In step S3, the connecting pipe 22 is pre-processed, that is, a connecting pipe 22 of a preset depth is drilled on the arc-shaped core 19.

[0060] The workpiece can be processed in four steps, without the need for expensive four-axis or five-axis machining centers, effectively reducing the difficulty and processing cost when manufacturing prototypes.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A jig for processing a bent core-pulling mold, used to process a workpiece, said workpiece comprising a first-stage part, a second-stage part, and a finished product in different processes, characterized in that, include: A first clamp for holding the first stage part, the first clamp having a first base plate, the first base plate having a positioning platform, the first stage part having a hollow portion, the positioning platform abutting against the side wall of the hollow portion to achieve positioning, the first clamp having a clamping plate opposite to the positioning platform, the clamping plate pressing against the outer side wall of the first stage part; the side wall of the hollow portion having a first surface and a second surface perpendicular to each other, the side wall of the positioning platform abutting against the first surface and the second surface, and simultaneously, the first base plate having a first side pressing block pressing against the outer side wall of the first stage part opposite to the second surface; A second clamp for holding the second-stage part, the second clamp including a mounting base and a second base plate rotating about a horizontally arranged axis, the second base plate being perpendicular to the horizontal plane and rotatably connected to the mounting base, the second-stage part having a base, the second base plate having a plurality of pressing blocks that press against the base, the mounting base having pin holes, the second base plate having positioning pins that can be inserted into the pin holes; the base having flanges on both sides along the width direction, the flanges having arc-shaped outer walls, the second base plate having a centering part that abuts against the outer wall of any one of the flanges, and the second base plate having arc-shaped clamping blocks that press against the flanges, the arc-shaped clamping blocks and the centering part being located on both sides of the base; The finished product includes an interconnected arc-shaped core and a base, with cooling water channels provided inside the arc-shaped core.

2. A fixture for processing bent core-pulling molds according to claim 1, characterized in that: The upper part of the base is provided with a clamping surface, and the second base plate is provided with a flat clamping block that presses against the clamping surface.

3. A jig for processing bent core-pulling molds according to claim 1, characterized in that: The second base plate has a rotating shaft on the side away from the second stage part, and the mounting base has a bearing for inserting the rotating shaft. After the second base plate is rotated to a preset angle, it is fixed to the mounting base by bolt connection.

4. A processing method, comprising a fixture for processing a curved core-pulling mold as described in any one of claims 1 to 3, further comprising a workpiece, a first-stage part, a second-stage part, a finished product, a first fixture and a second fixture, wherein the second-stage part is provided with an arc-shaped core and a base, and the arc-shaped core has cooling water channels, characterized in that, include: S1, Use a three-axis machining center to process the blank into the first stage part; S2, flip the first stage part and fix it on the first fixture to process the second stage part; S3, the second stage part is fixedly installed on the second fixture, and the arc-shaped core is machined; S4. Rotate the second base plate to a preset angle, and machine the cooling water channel on the arc-shaped core to produce the finished product.

5. The processing method according to claim 4, characterized in that: The cooling channel includes a first section and a second section, with an included angle between the first section and the second section to form a curved cooling channel. In step S4, after the first section is processed, the second base plate is rotated to a preset angle, and then the second section is processed.

6. The processing method according to claim 5, characterized in that: The first segment and the second segment are each provided with at least two, and the arc-shaped core is also provided with a connecting pipe. The connecting pipe connects two adjacent first segments. In step S3, the connecting pipe is pre-processed.

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