A precision mold correction fixture and fixture assembly

Abstract

The present invention provides a precision mold correction fixture and fixture assembly, including: a fixture main body, an offset surface for fixture offset is provided on one side of the fixture main body, and a positioning surface for fixture positioning; a circular hole is provided in the center of the fixture main body, and a plurality of rivet platforms are provided at the bottom of the circular hole, and the rivet platforms extend toward the center direction of the fixture main body to form a clamping structure; a plurality of positioning protrusions are provided on the offset surface, and countersunk screw holes are provided on the plurality of positioning protrusions; the positioning protrusions are respectively provided in the X-axis direction and the Y-axis direction through the center point of the offset surface, and the positioning protrusions include working surfaces provided on both sides of the positioning block, and the working surfaces are offset as a whole relative to the axis; by arranging the positioning protrusions along the X-axis and Y-axis directions, the positioning protrusions have an offset of a certain distance, and the correction fixture is selected and the correction fixture is locked to complete the correction of the mold, which is convenient and practical, does not require remaking a new mold, and has strong promotion significance.

Description

Technical Field

[0001] The present invention relates to the field of mechanical numerical control machining technology, and in particular to a precision mold correction fixture and a fixture assembly. Background Art

[0002] Molds are various molds and tools used in industrial production to produce the desired product through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. In short, molds are tools used to produce molded objects. These tools are composed of various parts, and different molds are composed of different parts. They mainly achieve the processing of the object's appearance by changing the physical state of the molded material. Known as the "mother of industry," they are tools that transform the blank into a part of a specific shape and size under the action of external forces. They are widely used in blanking, die forging, cold heading, extrusion, powder metallurgy pressing, pressure casting, and compression or injection molding of products such as engineering plastics, rubber, and ceramics. The mold has a specific contour or internal cavity shape, and the use of a contour shape with a cutting edge can enable the blank to be separated (blanked) according to the contour line shape. The application of the inner cavity shape can make the blank obtain the corresponding three-dimensional shape; the mold generally consists of two parts, a movable mold and a fixed mold (or a punch and a die), which can be separated and combined; when separated, the workpiece is taken out, and when combined, the blank is injected into the mold cavity for forming; the mold is a precision tool with a complex shape, which bears the expansion force of the blank and has high requirements for structural strength, rigidity, surface hardness, surface roughness and processing accuracy. The development level of mold production is one of the important indicators of the level of mechanical manufacturing.

[0003] In the existing technology, using a mold to press the workpiece on the surface of a CNC machine tool is a very common mechanical processing method. However, this processing method has very high requirements on the calibration accuracy and processing accuracy of the mold. When the Z-axis center of the mold is not concentric with the Z-axis center of the machine tool, it will cause large burrs on the pressed product, and qualified products cannot be pressed out in batches. Customer delivery time cannot be guaranteed, and the cost of remaking the mold is high. Therefore, a new mold correction fixture is urgently needed to solve the technical problems and shortcomings in the existing technology. Summary of the Invention

[0004] In response to the shortcomings of the above-mentioned technology, the present invention provides a precision mold correction fixture and a fixture assembly. The mold processing in the existing technology still has the problem that when the Z-axis center of the mold is not concentric with the Z-axis center of the machine tool, it will cause large burrs on the pressed product. Therefore, this application sets positioning protrusions along the X-axis and Y-axis directions, and makes the positioning protrusions have a certain distance of offset according to the size of the burr and the offset direction, thereby forming a correction fixture with an offset. The correction fixture is selected and locked to complete the correction of the mold. It is convenient and practical, and there is no need to remake a new mold, so it has strong promotion significance.

[0005] To achieve the above-mentioned objectives, the present invention provides a precision mold correction fixture, comprising: a fixture body, wherein one side of the fixture body is provided with an offset surface for fixture offset, and the side of the fixture body away from the offset surface is provided with a positioning surface for fixture positioning; a circular hole is provided in the center of the fixture body, and a plurality of rivet platforms for clamping the mold are provided at the bottom of the circular hole, and the rivet platforms extend toward the center direction of the fixture body to form a clamping structure; the offset surface is provided with a plurality of positioning protrusions, and a plurality of the positioning protrusions are provided with countersunk screw holes; the positioning protrusions are respectively provided in the X-axis direction and the Y-axis direction of the offset surface passing through the center point, and the positioning protrusions include working surfaces provided on both sides of the positioning block, and the working surfaces are offset as a whole relative to the axis.

[0006] In a specific embodiment: the positioning protrusions include at least two X-axis positioning protrusions and at least two Y-axis positioning protrusions, the X-axis positioning protrusions are provided in the X-axis direction of the offset surface passing through the center point, and the Y-axis positioning protrusions are provided in the Y-axis direction of the offset surface passing through the center point, the two X-axis positioning protrusions are symmetrically arranged on the upper and lower sides of the offset surface relative to the Y axis, and the Y-axis positioning protrusions are symmetrically arranged on the left and right sides of the offset surface relative to the X axis.

[0007] In a more preferred solution, the two working surfaces of the X-axis positioning protrusion are equidistant from the X-axis axis passing through the center point, and the two working surfaces of the Y-axis positioning protrusion are offset as a whole in the same direction relative to the Y-axis axis passing through the center point.

[0008] In a more preferred embodiment, the two working surfaces of the Y-axis positioning protrusion are equidistant from the Y-axis axis passing through the center point, and the two working surfaces of the X-axis positioning protrusion are offset in the same direction relative to the X-axis axis passing through the center point.

[0009] In a more preferred embodiment, the two working surfaces of the X-axis positioning protrusion are offset as a whole in the same direction relative to the X-axis axis passing through the center point; the two working surfaces of the Y-axis positioning protrusion are offset as a whole in the same direction relative to the Y-axis axis passing through the center point.

[0010] In a more preferred solution, the offset amount is 0.005mm-0.015mm.

[0011] In a specific solution: a clamping portion is provided at an extending end of the rivet platform extending toward the center direction of the clamp body, the clamping portion is an arc-shaped clamping portion, and the clamping surface of the arc-shaped clamping portion is an arc surface. When multiple arc-shaped clamping portions clamp the mold, the arc surface is in contact with the mold surface.

[0012] In a specific solution: the four diagonals of the offset surface are each provided with an outwardly protruding support boss, the protrusion height of the support boss is smaller than the protrusion height of the positioning boss, and the boss surface of the support boss is at least 2.5 mm away from the boss surface of the positioning boss.

[0013] In a specific solution: positioning blocks are provided at the four diagonals of the positioning surface, positioning plates are extended on both sides of the positioning blocks toward the adjacent diagonals, and positioning grooves for positioning the positioning protrusions of the next fixture are formed between the positioning plates and the positioning plates at the adjacent diagonals, and the thickness of the positioning plates is at least 1 mm.

[0014] A precision mold correction fixture assembly includes the precision mold correction fixture, a 3R locator and a punch base. The 3R locator is fixedly mounted on the punch base by screws. The side of the 3R locator away from the punch base is provided with a mounting groove adapted to be connected to the positioning protrusion and a cylindrical hole corresponding to the countersunk screw hole. The precision mold correction fixture is adapted to be connected to the 3R locator and fixedly mounted on the punch base by screws.

[0015] The beneficial effects of the present invention are as follows: compared with the prior art, the present invention provides a precision mold correction fixture and a fixture assembly, comprising: a fixture body, one side of the fixture body is provided with an offset surface for fixture offset, and the side of the fixture body away from the offset surface is provided with a positioning surface for fixture positioning; a circular hole is opened in the center of the fixture body, and a plurality of rivet platforms for clamping the mold are provided at the bottom of the circular hole, and the rivet platforms extend toward the center of the fixture body to form a clamping structure; the offset surface is provided with a plurality of positioning protrusions, and the plurality of positioning protrusions are provided with a plurality of positioning protrusions. A countersunk screw hole is provided; the positioning protrusions are respectively arranged in the X-axis direction and the Y-axis direction of the offset surface passing through the center point, and the positioning protrusions include working surfaces arranged on both sides of the positioning protrusions, and the working surfaces are offset as a whole relative to the axis; by arranging positioning protrusions along the X-axis and Y-axis directions, the positioning protrusions are given an offset of a certain distance according to the size of the burr and the offset direction, forming a correction fixture with an offset, selecting the correction fixture, locking the correction fixture, and completing the correction of the mold. It is convenient and practical, and there is no need to remake a new mold, and it has strong promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional exploded view of the clamp assembly of the present invention;

[0017] Figure 2 It is a front view of the clamp assembly of the present invention;

[0018] Figure 3 A three-dimensional view of the clamp of the present invention;

[0019] Figure 4 A bottom view of the clamp of the present invention;

[0020] Figure 5 A top view of the clamp of the present invention;

[0021] Figure 6 It is a front view of the clamp of the present invention;

[0022] Figure 7 This is an internal cross-sectional view of the clamp of the present invention.

[0023] The main component symbols are described as follows:

[0024] 1. Punch base;

[0025] 2.3R locator;

[0026] 3. Fixture body; 31. Positioning boss; 32. Support boss; 33. Offset surface; 34. Countersunk screw hole; 35. Positioning block; 36. Positioning plate; 37. Circular hole; 38. Rivet platform; 39. Arc surface; 30. Positioning surface;

[0027] 4. Screws. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0029] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0031] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the invention. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art will recognize that the invention can be implemented without these specific details. In other instances, known structures and processes are not described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles disclosed herein.

[0032] In the existing technology, using a mold to press the workpiece on the surface of a CNC machine tool is a very common mechanical processing method. However, this processing method has very high requirements on the calibration accuracy and processing accuracy of the mold. When the Z-axis center of the mold is not concentric with the Z-axis center of the machine tool, it will cause large burrs on the pressed product, and qualified products cannot be pressed out in batches. Customer delivery time cannot be guaranteed, and the cost of remaking the mold is high. Therefore, a new mold correction fixture is urgently needed to solve the technical problems and shortcomings in the existing technology.

[0033] In order to solve the defects and deficiencies in the prior art, the invention specifically provides a precision mold correction fixture and fixture assembly, please refer to Figure 1-Figure 7A precision mold correction fixture comprises: a fixture body 3, one side of the fixture body 3 is provided with an offset surface 33 for fixture offset, and the side of the fixture body 3 away from the offset surface 33 is provided with a positioning surface 30 for fixture positioning; a circular hole 37 is opened in the center of the fixture body 3, and a plurality of rivet platforms 38 for clamping the mold are provided at the bottom of the circular hole 37, and the rivet platforms 38 extend toward the center of the fixture body 3 to form a clamping structure; the offset surface 33 is provided with a plurality of positioning protrusions 31, and a plurality of countersunk screws are opened on the positioning protrusions 31 The pin 4 hole 34; the positioning protrusion 31 is provided in the X-axis direction and the Y-axis direction of the center point of the offset surface 33, and the positioning protrusion 31 includes working surfaces provided on both sides of the positioning block 35, and the working surfaces are offset as a whole relative to the axis; the offset surface 33 is used for positioning with the 3R positioner 2. After the mold is produced, when the Z-axis center of the mold is not concentric with the Z-axis center of the machine tool, it will cause large burrs on the pressed product, and qualified products cannot be pressed out in batches. The customer delivery time cannot be guaranteed, and the cost of remaking the mold is high; the offset surface 33 set in this application , a plurality of positioning protrusions 31 are provided on the offset surface 33. The setting of the positioning protrusions 31 is mainly to provide a certain amount of offset so that the entire clamping structure forms the same degree of offset. The positioning protrusions 31 can form a cross-shaped positioning structure in the X-axis direction and the Y-axis direction of the offset surface 33 passing through the center point. In this way, when positioning with the 3R positioner 2, the cross positioning structure can ensure that the displacement in the X-axis and Y-axis directions is limited, thereby realizing the position adjustment of the axis center of the Z-axis through the offset in the X-axis direction and the Y-axis direction to adapt to the Z-axis center of the machine tool, thereby reducing burrs and even To achieve the effect of no burrs; therefore, the offset needs to be processed when the positioning protrusion 31 is produced and formed; after completing the positioning of the positioning protrusion 31 and the 3R positioner 2, it is only necessary to fix the 3R positioner 2 and the fixture to the punch base 1 at the same time by screws 4, and the clamped mold has completed the correction of the offset. At this time, further processing can avoid the generation of burrs; the extended clamping structure of the rivet platform 38 is mainly used to clamp the mold, and the position offset of the positioning protrusion 31 will cause a certain amount of offset in the position of the rivet platform 38 and the rivet platform 38 of the 3R positioner 2.

[0034] In a specific embodiment, please refer to: Figure 1-Figure 7The positioning protrusion 31 includes at least two X-axis positioning protrusions 31 and at least two Y-axis positioning protrusions 31. The offset surface 33 is provided with the X-axis positioning protrusion 31 in the X-axis direction through the center point, and the offset surface 33 is provided with the Y-axis positioning protrusion 31 in the Y-axis direction through the center point. The two X-axis positioning protrusions 31 are symmetrically arranged on the upper and lower sides of the offset surface 33 relative to the Y axis, and the Y-axis positioning protrusion 31 is symmetrically arranged on the left and right sides of the offset surface 33 relative to the X axis; at least two X-axis positioning protrusions 31 and at least two Y-axis positioning protrusions 31 in two directions are provided, mainly because an axial direction position determination can be formed between the two positioning protrusions 31, and the position determination in the two axial directions can be completed here. At the same time, the working surface is used to closely contact with the groove surface of the 3R positioner 2 to form positioning.

[0035] In a more preferred embodiment, see Figure 1-Figure 7 , the distances between the two working surfaces of the X-axis positioning protrusion 31 and the X-axis axis passing through the center point are equal, and the two working surfaces of the Y-axis positioning protrusion 31 are offset as a whole in the same direction relative to the Y-axis axis passing through the center point; the equal distances between the two working surfaces of the X-axis positioning protrusion 31 and the X-axis axis passing through the center point indicate that this fixture does not need to be offset in the X-axis direction. The burrs are mainly generated in the Y-axis direction. At this time, the two working surfaces of the Y-axis are offset as a whole in the opposite direction of the burr generation direction. After the correction is completed, the offset generated can be corrected so that the Z-axis center of the mold is concentric with the Z-axis center of the machine tool, and the correction is completed.

[0036] In a more preferred embodiment, see Figure 1-Figure 7 , the distances between the two working surfaces of the Y-axis positioning protrusion 31 and the Y-axis axis passing through the center point are equal, and the two working surfaces of the X-axis positioning protrusion 31 are offset as a whole in the same direction relative to the X-axis axis passing through the center point; the equal distances between the two working surfaces of the Y-axis positioning protrusion 31 and the Y-axis axis passing through the center point indicate that this fixture does not need to be offset in the Y-axis direction. The burrs are mainly generated in the X-axis direction. At this time, the two working surfaces of the X-axis are offset as a whole in the opposite direction of the burr generation direction. After the correction is completed, the offset generated can be corrected so that the Z-axis center of the mold is concentric with the Z-axis center of the machine tool, and the correction is completed.

[0037] In a more preferred embodiment, see Figure 1-Figure 7, the two working surfaces of the X-axis positioning protrusion 31 are offset as a whole in the same direction relative to the X-axis axis passing through the center point; the two working surfaces of the Y-axis positioning protrusion 31 are offset as a whole in the same direction relative to the Y-axis axis passing through the center point; in this embodiment, the two working surfaces of the X-axis positioning protrusion 31 and the Y-axis positioning protrusion 31 are offset as a whole in the same direction relative to the X-axis axis and the Y-axis axis passing through the center point. This is because the Z-axis center of the mold is offset in directions other than the X-axis direction and the Y-axis direction. At this time, the two working surfaces of the X-axis and the two working surfaces of the Y-axis are offset as a whole in the opposite direction of the burr generation direction. After the correction is completed, the offset generated can be corrected so that the Z-axis center of the mold is concentric with the Z-axis center of the machine tool, and the correction is completed.

[0038] In a more preferred embodiment, see Figure 1-Figure 7 , the offset is 0.005mm-0.015mm.

[0039] Example 1: The distances between the two working surfaces of the X-axis positioning protrusion 31 and the X-axis axis passing through the center point are equal, the symmetry of the two working surfaces of the X-axis positioning protrusion 31 relative to the X-axis axis passing through the center point is ≤0.002mm, and the two working surfaces of the Y-axis positioning protrusion 31 are offset by 0.005mm in the same direction relative to the Y-axis axis passing through the center point, thereby achieving the effect of causing the Z-axis center of the mold to be offset by 0.005mm.

[0040] Example 2: The distances between the two working surfaces of the X-axis positioning protrusion 31 and the X-axis axis passing through the center point are equal, the symmetry of the two working surfaces of the X-axis positioning protrusion 31 relative to the X-axis axis passing through the center point is ≤0.002mm, and the two working surfaces of the Y-axis positioning protrusion 31 are offset by 0.005mm in the same direction relative to the Y-axis axis passing through the center point, thereby achieving the effect of causing the Z-axis center of the mold to be offset by 0.01mm.

[0041] Example 3: The distances between the two working surfaces of the X-axis positioning protrusion 31 and the X-axis axis passing through the center point are equal, the symmetry of the two working surfaces of the X-axis positioning protrusion 31 relative to the X-axis axis passing through the center point is ≤0.002mm, and the two working surfaces of the Y-axis positioning protrusion 31 are offset by 0.015mm in the same direction relative to the Y-axis axis passing through the center point, thereby achieving the effect of causing the Z-axis center of the mold to be offset by 0.015mm.

[0042] Example 4: The distances between the two working surfaces of the Y-axis positioning protrusion 31 and the Y-axis axis passing through the center point are equal, the symmetry of the two working surfaces of the Y-axis positioning protrusion 31 relative to the Y-axis axis passing through the center point is ≤0.002mm, and the two working surfaces of the X-axis positioning protrusion 31 are offset by 0.005mm in the same direction relative to the X-axis axis passing through the center point, thereby achieving the effect of causing the Z-axis center of the mold to be offset by 0.005mm.

[0043] Example 5: The distances between the two working surfaces of the Y-axis positioning protrusion 31 and the Y-axis axis passing through the center point are equal, the symmetry of the two working surfaces of the Y-axis positioning protrusion 31 relative to the Y-axis axis passing through the center point is ≤0.002mm, and the two working surfaces of the X-axis positioning protrusion 31 are offset by 0.01mm in the same direction relative to the X-axis axis passing through the center point, thereby achieving the effect of causing the Z-axis center of the mold to be offset by 0.01mm.

[0044] Example 6: The distances between the two working surfaces of the Y-axis positioning protrusion 31 and the Y-axis axis passing through the center point are equal, the symmetry of the two working surfaces of the Y-axis positioning protrusion 31 relative to the Y-axis axis passing through the center point is ≤0.002mm, and the two working surfaces of the X-axis positioning protrusion 31 are offset by 0.015mm in the same direction relative to the X-axis axis passing through the center point, thereby achieving the effect of causing the Z-axis center of the mold to be offset by 0.015mm.

[0045] Example 7: The two working surfaces of the X-axis positioning protrusion 31 and the Y-axis positioning protrusion 31 are offset by 0.005 mm in the same direction relative to the X-axis axis and the Y-axis axis passing through the center point. This is because the Z-axis center of the mold is offset in a direction other than the X-axis direction and the Y-axis direction. At this time, the two working surfaces of the X-axis and the two working surfaces of the Y-axis are offset by 0.005 mm in the opposite direction of the burr generation direction. After the correction is completed, the offset can be corrected so that the Z-axis center of the mold is concentric with the Z-axis center of the machine tool, and the correction is completed.

[0046] Example 8: The two working surfaces of the X-axis positioning protrusion 31 and the Y-axis positioning protrusion 31 are offset by 0.01 mm in the same direction relative to the X-axis axis and the Y-axis axis passing through the center point. This is because the Z-axis center of the mold is offset in a direction other than the X-axis direction and the Y-axis direction. At this time, the two working surfaces of the X-axis and the two working surfaces of the Y-axis are offset by 0.01 mm in the opposite direction of the burr generation direction. After the correction is completed, the offset generated can be corrected so that the Z-axis center of the mold is concentric with the Z-axis center of the machine tool, and the correction is completed.

[0047] Example 9: The two working surfaces of the X-axis positioning protrusion 31 and the Y-axis positioning protrusion 31 are offset by 0.015mm in the same direction relative to the X-axis axis and the Y-axis axis passing through the center point. This is because the Z-axis center of the mold is offset in a direction other than the X-axis direction and the Y-axis direction. At this time, the two working surfaces of the X-axis and the two working surfaces of the Y-axis are offset by 0.015mm in the opposite direction of the burr generation direction. After the correction is completed, the offset can be corrected so that the Z-axis center of the mold is concentric with the Z-axis center of the machine tool, and the correction is completed.

[0048] In a specific embodiment, please refer to: Figure 1-Figure 7 The extending end of the rivet platform 38 extending toward the center direction of the clamp body 3 is provided with a clamping portion, and the clamping portion is an arc-shaped clamping portion, and the clamping surface of the arc-shaped clamping portion is an arc surface 39. When multiple arc-shaped clamping portions clamp the mold, the arc surface 39 is in contact with the mold surface; the arc surface 39 can adapt to the circular surface of the mold to achieve a better clamping correction effect.

[0049] In a specific embodiment, please refer to: Figure 1-Figure 7 The four diagonal corners of the offset surface 33 are each provided with an outwardly protruding support boss 32, the protrusion height of the support boss 32 is less than the protrusion height of the positioning boss, and the boss surface of the support boss 32 is at least 2.5 mm away from the boss surface of the positioning boss; in an implemented embodiment, 2.5 mm is selected.

[0050] In a specific embodiment, please refer to: Figure 1-Figure 7 The four diagonal corners of the positioning surface 30 are each provided with a positioning block 35, and positioning plates 36 are extended on both sides of the positioning block 35 toward the adjacent diagonal directions. The positioning plates 36 and the positioning plates 36 at the adjacent diagonals are spaced apart to form a positioning groove for positioning the positioning protrusion 31 of the next fixture. The thickness of the positioning plate 36 is at least 1 mm; in an implemented embodiment, 1 mm is selected.

[0051] In a specific embodiment, please refer to: Figure 1-Figure 7 The working surface and outer edge of the positioning protrusion 31 are both set as chamfered structures, and the outer edge of the supporting boss 32 is also set with a chamfered structure. The chamfered structure is to have a better entry and exit structure during adaptation and installation.

[0052] A precision mold correction fixture assembly includes the precision mold correction fixture, a 3R locator 2, and a punch base 1. The 3R locator 2 is fixedly mounted on the punch base 1 by screws 4. The side of the 3R locator 2 away from the punch base 1 is provided with a mounting groove adapted to connect with the positioning protrusion 31 and a cylindrical hole corresponding to the countersunk screw hole 34. The precision mold correction fixture is adapted to connect with the 3R locator 2 and fixedly mounted on the punch base 1 by screws 4. When pressing a product, if the mold Z-axis center is not concentric with the machine tool Z-axis center, resulting in large burrs and preventing mass production, a correction fixture is selected based on the burr size and offset direction. As shown in the assembly drawing, the correction fixture is positioned with the 3R substrate locator through the positioning protrusion 31, the support boss 32 contacts the bottom of the 3R locator 2, and the four screws 4 pass through the countersunk hole and the cylindrical hole in the same part of the 3R locator 2 and match with the threaded hole of the punch base 1. The correction fixture is locked to complete the correction of the mold.

[0053] The advantages of the present invention are:

[0054] By setting positioning protrusions along the X-axis and Y-axis directions, the positioning protrusions are offset to a certain distance according to the size of the burr and the offset direction, thereby forming a correction fixture with an offset. The correction fixture is selected and locked to complete the correction of the mold. This is convenient and practical, and there is no need to remake a new mold, which has strong promotion significance.

[0055] The above disclosures are only several specific embodiments of the present invention, but the present invention is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A precision mold calibration fixture, characterized in that: include: The clamp body has an offset surface on one side for offsetting the clamp, and a positioning surface on the other side of the clamp body away from the offset surface for positioning the clamp; a circular hole is provided in the center of the clamp body, and a plurality of rivet platforms for clamping the mold are provided at the bottom of the circular hole, and the rivet platforms extend toward the center of the clamp body to form a clamping structure; a plurality of positioning protrusions are provided on the offset surface, and a plurality of countersunk screw holes are provided on the positioning protrusions; the positioning protrusions are respectively provided in the X-axis direction and the Y-axis direction of the offset surface passing through the center point, and the positioning protrusions include working surfaces provided on both sides of the positioning block, and the working surfaces are offset as a whole relative to the axis.

2. A precision mold correction fixture according to claim 1, characterized in that: The positioning protrusions include at least two X-axis positioning protrusions and at least two Y-axis positioning protrusions. The X-axis positioning protrusion is provided in the X-axis direction of the offset surface passing through the center point, and the Y-axis positioning protrusion is provided in the Y-axis direction of the offset surface passing through the center point. The two X-axis positioning protrusions are symmetrically arranged on the upper and lower sides of the offset surface relative to the Y axis, and the Y-axis positioning protrusions are symmetrically arranged on the left and right sides of the offset surface relative to the X axis.

3. A precision mold correction fixture according to claim 2, characterized in that: The two working surfaces of the X-axis positioning protrusion are equidistant from the X-axis axis passing through the center point, and the two working surfaces of the Y-axis positioning protrusion are offset as a whole in the same direction relative to the Y-axis axis passing through the center point.

4. A precision mold correction fixture according to claim 2, characterized in that: The two working surfaces of the Y-axis positioning protrusion are equidistant from the Y-axis axis passing through the center point, and the two working surfaces of the X-axis positioning protrusion are offset as a whole in the same direction relative to the X-axis axis passing through the center point.

5. A precision mold correction fixture according to claim 2, characterized in that: The two working surfaces of the X-axis positioning protrusion are offset as a whole in the same direction relative to the X-axis axis passing through the center point; the two working surfaces of the Y-axis positioning protrusion are offset as a whole in the same direction relative to the Y-axis axis passing through the center point.

6. A precision mold correction fixture according to any one of claims 3 to 5, characterized in that: The offset is 0.005mm-0.015mm.

7. The precision mold correction fixture according to claim 1, characterized in that: The extending end of the rivet platform extending toward the center direction of the clamp body is provided with a clamping portion, and the clamping portion is an arc-shaped clamping portion, and the clamping surface of the arc-shaped clamping portion is an arc surface. When multiple arc-shaped clamping portions clamp the mold, the arc surface is in contact with the mold surface.

8. The precision mold calibration fixture according to claim 1, characterized in that: The four diagonal corners of the offset surface are each provided with an outwardly protruding support boss, the protruding height of the support boss is smaller than the protruding height of the positioning boss, and the boss surface of the support boss is at least 2.5 mm away from the boss surface of the positioning boss.

9. The precision mold correction fixture according to claim 1, characterized in that: The four diagonal corners of the positioning surface are each provided with a positioning block, and positioning plates are extended on both sides of the positioning block toward the adjacent diagonal directions. Positioning grooves for positioning the positioning protrusions of the next fixture are formed between the positioning plates and the positioning plates at adjacent diagonals, and the thickness of the positioning plates is at least 1 mm.

10. A precision mold correction fixture assembly, characterized in that: It comprises the precision mold correction fixture, 3R locator and punch base as described in any one of claims 1 to 9, the 3R locator is fixedly mounted on the punch base by screws, the side of the 3R locator away from the punch base is provided with a mounting groove adapted to be connected to the positioning protrusion and a cylindrical hole corresponding to the countersunk screw hole, the precision mold correction fixture is adapted to be connected to the 3R locator and fixedly mounted on the punch base by screws.

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