Quick positioning jig for turning square mold core

Abstract

The utility model discloses a quick positioning jig for turning a square mold core, which is characterized in that an accommodating hole is formed inside a jig main body, and the cross section of the accommodating hole is square; a first positioning reference surface, a second positioning reference surface, a first clearance surface and a second clearance surface are arranged on the inner wall of the accommodating hole, a first inner threaded hole with an outward opening is formed in the first clearance surface, a second inner threaded hole with an outward opening is formed in the second clearance surface, a first clamping screw is screwed in the first inner threaded hole, and a second clamping screw is screwed in the second inner threaded hole; a second clamping screw is screwed in the second inner threaded hole; the first positioning reference surface is adjacent to the second positioning reference surface, and the first positioning reference surface is perpendicular to the second positioning reference surface; the first positioning reference surface is right opposite to the first clearance surface, and the second positioning reference surface is right opposite to the second clearance surface. By means of the structural design, the device has the advantages of being novel in structural design, low in machining cost and high in adaptability.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a quick positioning fixture for turning square mold cores. Background Technology

[0002] During the turning process of a square mold core, a fixture is usually used to clamp it in order to fix it in place; however, since the shape of the square mold core is not circular, a circular fixture is needed to fix it in place on the outside of the square mold core in order to meet the turning requirements.

[0003] Among them, the Chinese utility model patent with patent number ZL201920531278.X and patent name: "An Array Mold Core Turning Fixture" specifically discloses the following technical solution: The array mold core turning fixture has a receiving layer and an alignment layer. The receiving layer has a receiving groove, which is located on the side of the receiving layer away from the alignment layer. The receiving groove is used to receive the workpiece to be turned. When the workpiece to be turned is received in the receiving groove, the workpiece to be turned fits against the two opposite groove walls of the receiving groove. The receiving layer also has at least two positioning holes, which respectively penetrate the other two opposite groove walls of the receiving groove and correspond to each other. The two positioning holes have threads. By setting screws in the two positioning holes respectively, the workpiece to be turned, which can be moved to any position in the receiving groove, can be locked to position the workpiece to be turned in the receiving groove.

[0004] It should be noted that the above-mentioned array mold core turning fixture has the following defects, specifically:

[0005] Defect 1: The two opposing groove walls of the receiving groove, which are in contact with the workpiece to be turned, serve as the positioning reference surfaces for the workpiece. The two positioning reference surfaces are arranged opposite each other at intervals. When positioning the workpiece, each positioning reference surface is in contact with the corresponding side of the workpiece. When machining this array mold core turning fixture, the relative positional accuracy of the two positioning reference surfaces is required to be high, such as parallelism and distance accuracy. The accuracy of the workpiece to be turned is also required to be high. Only in this way can the workpiece to be turned be accurately placed between the two positioning reference surfaces and ensure that the workpiece to be turned is in contact with the two positioning reference surfaces. This will obviously increase the machining cost of the fixture and the machining cost of the workpiece to be turned.

[0006] Defect 2: This array mold core turning fixture is only suitable for positioning and fixing workpieces of specific sizes and specifications, and has poor adaptability. Utility Model Content

[0007] The purpose of this utility model is to provide a quick positioning fixture for turning square mold cores, which addresses the shortcomings of existing technologies. This quick positioning fixture for turning square mold cores has a novel structural design, low processing cost, and strong adaptability.

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0009] A quick positioning fixture for turning a square mold core includes a fixture body, which is a cylindrical part. The fixture body has an upward-opening receiving hole that extends along the axis of the fixture body. The cross-section of the receiving hole is square.

[0010] The inner wall of the receiving hole has a first positioning reference surface, a second positioning reference surface, a first clearance surface, and a second clearance surface. The first clearance surface has a first internal threaded hole that opens outward, and the second clearance surface has a second internal threaded hole that opens outward. A first clamping screw is threaded into the first internal threaded hole, and a second clamping screw is threaded into the second internal threaded hole.

[0011] The first positioning reference plane and the second positioning reference plane are arranged adjacent to each other, and the first positioning reference plane and the second positioning reference plane are perpendicular to each other;

[0012] The first positioning reference plane is directly opposite the first clearance plane, and the second positioning reference plane is directly opposite the second clearance plane.

[0013] The fixture body has a fixture base plate on its lower surface. The fixture base plate is circular and is coaxially arranged with the fixture body. The fixture base plate covers the lower opening of the receiving hole of the fixture body.

[0014] The main body of the fixture and the base plate of the fixture are an integral structure.

[0015] The base plate of the fixture is fastened to the lower surface of the fixture body by locking screws.

[0016] The axis of the first internal threaded hole is perpendicular to the first clearance surface, and the axis of the second internal threaded hole is perpendicular to the second clearance surface.

[0017] The fixture body has two first internal threaded holes arranged at an interval, and each first internal threaded hole is screwed with a first clamping screw.

[0018] The fixture body has two second internal threaded holes arranged at an upper and lower interval, and a second clamping screw is screwed into each second internal threaded hole.

[0019] Compared with the prior art, the present invention has the following beneficial effects, specifically:

[0020] 1. The first positioning reference plane and the second positioning reference plane are perpendicular to each other. This arrangement of positioning reference planes can effectively reduce the machining accuracy requirements of their relative positions on the one hand, and on the other hand, it can also reduce the machining accuracy requirements of the square mold core. Compared with the prior art, this utility model can effectively reduce the processing cost.

[0021] 2. When clamping the square mold core, the first clearance surface opposite to the first positioning reference surface and the second clearance surface opposite to the second positioning reference surface respectively clear the square mold core. The first positioning reference surface and the second positioning reference surface are perpendicular to each other and are used to position the two perpendicular surfaces of the square mold core. This structural design makes the utility model applicable to square mold cores of different sizes and specifications, and has strong adaptability.

[0022] 3. Therefore, the quick positioning fixture for turning square mold cores of this utility model has the advantages of novel structural design, low processing cost and strong adaptability. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention when clamping a square mold core.

[0025] Figure 2 for Figure 1 A schematic diagram of its breakdown.

[0026] Figure 3 This is a schematic diagram of the structure of this utility model without the square mold core being clamped.

[0027] exist Figures 1 to 3 This includes:

[0028] 1- Fixture body; 2- Accommodation hole; 31- First positioning reference surface; 32- Second positioning reference surface; 41- First clearance surface; 42- Second clearance surface; 51- First internal threaded hole; 52- Second internal threaded hole; 61- First clamping screw; 62- Second clamping screw; 7- Fixture base plate; 8- Locking screw; 9- Square mold core. Detailed Implementation

[0029] The present invention will now be described in conjunction with specific embodiments.

[0030] Example 1, as Figures 1 to 3 As shown, a quick positioning fixture for turning a square mold core includes a fixture body 1, which is a cylindrical part. The fixture body 1 has an upward-opening receiving hole 2 extending along the axial direction of the fixture body 1. The cross-section of the receiving hole 2 is square.

[0031] Among them, such as Figures 1 to 3 As shown, the inner wall of the receiving hole 2 has a first positioning reference surface 31, a second positioning reference surface 32, a first clearance surface 41, and a second clearance surface 42. The first clearance surface 41 has a first internally threaded hole 51 that opens outwards, and the second clearance surface 42 has a second internally threaded hole 52 that opens outwards. A first clamping screw 61 is screwed into the first internally threaded hole 51, and a second clamping screw 62 is screwed into the second internally threaded hole 52.

[0032] Furthermore, such as Figure 2 and Figure 3 As shown, the first positioning reference surface 31 and the second positioning reference surface 32 are arranged adjacent to each other, and the first positioning reference surface 31 and the second positioning reference surface 32 are perpendicular to each other.

[0033] Furthermore, the first positioning reference surface 31 is directly opposite the first clearance surface 41, and the second positioning reference surface 32 is directly opposite the second clearance surface 42.

[0034] It should be explained that the axis of the first internal threaded hole 51 is perpendicular to the first clearance surface 41, and the axis of the second internal threaded hole 52 is perpendicular to the second clearance surface 42.

[0035] In the process of positioning and clamping the square mold core 9 using the quick positioning fixture for turning the square mold core in this embodiment, the square mold core 9 is inserted into the receiving hole 2 of the fixture body 1, and two surfaces of the square mold core 9 abut against the first positioning reference surface 31 and the second positioning reference surface 32, respectively, so as to achieve positioning of the square mold core 9 through the first positioning reference surface 31 and the second positioning reference surface 32. At this time, the first clearance surface 41 and the second clearance surface 42 are spaced apart from the corresponding surfaces of the square mold core 9 to achieve clearance; in the square mold core 9 After positioning by the first positioning reference surface 31 and the second positioning reference surface 32, tighten the first clamping screw 61 in the first internal threaded hole 51 and the second clamping screw 62 in the second internal threaded hole 52. The first clamping screw 61 presses against the square mold core 9 on the side of the first positioning reference surface 31, and the second clamping screw 62 presses against the square mold core 9 on the side of the second positioning reference surface 32, so that the square mold core 9 is clamped and fixed in the receiving hole 2 of the fixture body 1, and the square mold core 9 is kept in contact with the first positioning reference surface 31 and the second positioning reference surface 32.

[0036] It should be noted that the first positioning reference surface 31 and the second positioning reference surface 32 in this embodiment are perpendicular to each other. This arrangement of positioning reference surfaces can effectively reduce the machining accuracy requirements of their relative positions on the one hand, and also reduce the machining accuracy requirements of the square mold core 9 on the other hand. Compared with the prior art, the quick positioning fixture for turning the square mold core in this embodiment can effectively reduce the machining cost.

[0037] It should be emphasized that when clamping the square mold core 9, the first clearance surface 41 opposite to the first positioning reference surface 31 and the second clearance surface 42 opposite to the second positioning reference surface 32 respectively clear the square mold core 9. The perpendicular first positioning reference surface 31 and the second positioning reference surface 32 are used to position the two perpendicular surfaces of the square mold core 9. This structural design enables the quick positioning fixture for turning the square mold core of this embodiment to be applicable to square mold cores 9 of different sizes and specifications, and has strong adaptability.

[0038] In summary, the quick positioning fixture for turning square mold cores in this embodiment has the advantages of novel structural design, low processing cost, and strong adaptability through the above structural design.

[0039] Example 2, as Figures 1 to 3 As shown, the difference between this embodiment 2 and embodiment 1 is that: a fixture base plate 7 is provided on the lower surface of the fixture body 1. The fixture base plate 7 is a circular piece and is arranged coaxially with the fixture body 1. The fixture base plate 7 blocks the lower opening of the receiving hole 2 of the fixture body 1.

[0040] It should be noted that the fixture base plate 7 in this embodiment can be designed as an integral structure or as a split structure. For the fixture base plate 7 with an integral structure, the fixture body 1 and the fixture base plate 7 are an integral structure. For the fixture base plate 7 with a split structure, the fixture base plate 7 can be screwed and fastened to the lower surface of the fixture body 1 by locking screws 8.

[0041] During the process of inserting the square mold core 9 into the receiving hole 2 placed in the fixture body 1, the lower surface of the square mold core 9 abuts against and is limited to the fixture base plate 7, so as to vertically limit the square mold core 9 through the fixture base plate 7.

[0042] Example 3, as Figure 1 and Figure 2 As shown, the difference between this embodiment 3 and embodiment 1 is that the fixture body 1 has two first internal threaded holes 51 arranged at intervals, and each first internal threaded hole 51 is screwed with a first clamping screw 61.

[0043] Similarly, the fixture body 1 has two second internal threaded holes 52 arranged at intervals, and each second internal threaded hole 52 is screwed with a second clamping screw 62.

[0044] By using two first clamping screws 61 and two second clamping screws 62 to press against the square mold core 9, the quick positioning fixture for turning the square mold core in this embodiment 3 can effectively improve the stability of clamping and fixing the square mold core 9.

[0045] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A quick positioning fixture for turning a square mold core, comprising a fixture body (1), the fixture body (1) being a cylindrical part, and an accommodating hole (2) opening upward and extending along the axial direction of the fixture body (1) inside the fixture body (1), the accommodating hole (2) having a square cross-section. The inner wall of the receiving hole (2) has a first positioning reference surface (31), a second positioning reference surface (32), a first clearance surface (41), and a second clearance surface (42). The first clearance surface (41) has an outward-opening first internal threaded hole (51), and the second clearance surface (42) has an outward-opening second internal threaded hole (52). The first internal threaded hole (51) is internally threaded with a first clamping screw (61), and the second internal threaded hole (52) is internally threaded with a second clamping screw (62). characterized in that The first positioning reference plane (31) and the second positioning reference plane (32) are arranged adjacent to each other, and the first positioning reference plane (31) and the second positioning reference plane (32) are perpendicular to each other; The first positioning reference plane (31) is directly opposite the first clearance plane (41), and the second positioning reference plane (32) is directly opposite the second clearance plane (42).

2. The quick positioning jig for turning square core according to claim 1, characterized in that: The lower surface of the fixture body (1) is provided with a fixture base plate (7). The fixture base plate (7) is a circular piece and is arranged coaxially with the fixture body (1). The fixture base plate (7) covers the lower opening of the receiving hole (2) of the fixture body (1).

3. The quick positioning jig for square core bar turning according to claim 2, characterized in that: The main body (1) of the fixture and the base plate (7) of the fixture are an integral structure.

4. The quick positioning jig for turning square core according to claim 2, characterized in that: The fixture base plate (7) is fastened to the lower surface of the fixture body (1) by locking screws (8).

5. The quick positioning jig for square core bar turning according to claim 1, characterized in that: The axis of the first internal threaded hole (51) is perpendicular to the first clearance surface (41), and the axis of the second internal threaded hole (52) is perpendicular to the second clearance surface (42).

6. The quick positioning jig for square core bar turning according to claim 1, characterized in that: The fixture body (1) has two first internal threaded holes (51) arranged at an upper and lower interval, and each first internal threaded hole (51) is screwed with a first clamping screw (61).

7. The quick positioning jig for square core bar turning according to claim 1, characterized in that: The fixture body (1) has two second internal threaded holes (52) arranged at an upper and lower interval, and each second internal threaded hole (52) is screwed with a second clamping screw (62).

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