Polishing jig for upper and lower special-shaped end faces of powder metallurgy die and using method

Abstract

A jig body is provided with a die up-and-down type containing hole in the vertical direction, notches are symmetrically formed in the X-axis direction of the die up-and-down type containing hole, the depth of the notches is matched with the height of the front end of a chamfer of the special-shaped end face, and the width of the notches is matched with the height of the front end of the chamfer of the special-shaped end face of the special-shaped end face of the special-shaped end face of the special-shaped end face of the special-shaped end face of the special-shaped end face. The inclined angle of the inclined plane of the notch is matched with the inclined angle of the inclined plane of the chamfer tip of the special-shaped end face, and accommodating parts of the chamfer tip of the special-shaped end face, which are symmetrically arranged, are formed in the Y-axis direction of the upper and lower mold accommodating holes of the mold. The chamfering tip of the special-shaped end face is contained in the containing part of the jig body, the containing part can effectively protect the chamfering tip of the special-shaped end face, the chamfering tip is prevented from being abraded or deformed in the polishing process, and damage to an upper mold or a lower mold of a mold is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of powder metallurgy mold processing, in particular to a powder metallurgy mold upper and lower special-shaped end surface polishing fixture and a use method. Background Art

[0002] Powder metallurgy is a process technology that produces metal powder or uses metal powder (or a mixture of metal powder and non-metal powder) as raw material, and then forms and sinters it to produce metal materials, composite materials and various types of products. Powder metallurgy is similar to the production of ceramics, both of which belong to powder sintering technology. Therefore, a series of new powder metallurgy technologies can also be used in the preparation of ceramic materials.

[0003] After the upper mold or lower mold of the mold used in powder metallurgy has been used for a period of time, in order to reduce the adhesion of powder on the upper mold end face and the lower mold end face, to avoid powder sticking during demoulding, and also to improve the finish of the upper mold end face and the lower mold end face, it is usually necessary to polish the upper mold end face and the lower mold end face of the mold. During the polishing process, the upper mold or the lower mold of the mold to be polished is fixed on the polishing equipment, and the upper mold end face or the lower mold end face of the mold is raised from the reference plane of the fixed fixture, and the upper mold end face or the lower mold end face of the mold is polished by a brush and abrasive paste. If the upper mold end face or the lower mold end face is a regular shape, then there is no effect on the upper mold end face or the lower mold end face during the polishing process. If the upper mold end face or the lower mold end face is an irregular shape, for example, the upper mold end face or the lower mold end face has a chamfered tip, because the width of the chamfered tip is only 0.1mm, then the above method is used for polishing during the polishing process, which can easily cause the chamfered tip to wear or deform without any protection, resulting in damage to the upper mold or the lower mold of the mold. Summary of the invention

[0004] Based on this, it is necessary to provide a powder metallurgy mold upper and lower special-shaped end surface polishing fixture and use method, which can effectively avoid damage to the chamfer tip during the polishing process of the upper end surface or the lower end surface of the mold.

[0005] A powder metallurgy mold upper and lower type special-shaped end face polishing jig, comprising a jig body, the jig body is provided with a mold upper and lower type accommodating hole in the vertical direction, notches are symmetrically provided along the X-axis direction of the mold upper and lower type accommodating hole, the depth of the notch is adapted to the height of the chamfered tip of the special-shaped end face, the inclination angle of the notch slope is adapted to the inclination angle of the chamfered tip of the special-shaped end face, and accommodating portions of the chamfered tip of the special-shaped end face are symmetrically formed in the Y-axis direction of the mold upper and lower type accommodating hole, a mold upper and lower type fixing hole is provided at a preset position on the side of the jig body, and the mold upper and lower type fixing hole is connected to the mold upper and lower type accommodating hole.

[0006] In one embodiment, the top surface of the jig body is provided with a limit assembly, and the limit assembly includes a rotating member and a baffle, one end of the baffle is mounted on the rotating member, and the bottom surface of the other end of the baffle is in contact with the top surface of the jig body and is at least partially located at the top of the accommodating portion in the vertical direction, and the rotating member can drive the baffle to rotate along a preset direction.

[0007] In one embodiment, the notch is an inverted trapezoidal structure and is connected to the upper and lower accommodating holes of the mold.

[0008] In one of the embodiments, the powder metallurgy mold upper and lower special-shaped end surface polishing fixture also includes a flexible buffer plate, which is installed on the inner layer of the accommodating portion and is used to wrap the outer layer of the chamfered tip of the special-shaped end surface.

[0009] In one embodiment, the flexible buffer plate is made of one or more of silicone, silicone rubber or polyurethane rubber.

[0010] In one of the embodiments, a side of the jig body close to the notch has a positioning notch, and the positioning notch is used for positioning the jig when it is installed on the polishing equipment.

[0011] In one embodiment, the width of the notch matches the width of the special-shaped end surface.

[0012] In one embodiment, the fixture body is made of carbon fiber or titanium alloy material.

[0013] A method for using a powder metallurgy mold upper and lower special-shaped end surface polishing jig, which is applied to the powder metallurgy mold upper and lower special-shaped end surface polishing jig, and the processing method includes: Insert the special-shaped end surface of the upper mold or lower mold to be polished into the jig body from the bottom of the upper and lower mold receiving holes of the mold; The chamfered tip of the special-shaped end surface is accommodated in the accommodation portion during the movement of the upper and lower accommodation holes of the mold; The external fixing part is in contact with the upper mold or the lower mold to be polished through the upper and lower mold fixing holes of the mold.

[0014] In one of the embodiments, the upper and lower fixing holes of the mold are provided with internal threads which are threadably matched with the external threads of the external fixing member.

[0015] The above-mentioned powder metallurgy mold upper and lower type special-shaped end face polishing jig has a jig body with mold upper and lower type accommodating holes in the vertical direction, and notches are symmetrically opened along the X-axis direction of the mold upper and lower type accommodating holes. The depth of the notch is adapted to the height of the chamfered tip of the special-shaped end face, and the inclination angle of the notch slope is adapted to the inclination angle of the slope of the chamfered tip of the special-shaped end face. A symmetrically arranged accommodating portion of the chamfered tip of the special-shaped end face is formed in the Y-axis direction of the mold upper and lower type accommodating holes. When polishing the special-shaped end face of the upper or lower mold, the chamfered tip of the special-shaped end face is accommodated in the accommodating portion of the jig body. The accommodating portion can effectively protect the chamfered tip of the special-shaped end face to avoid wear or deformation of the chamfered tip during the polishing process, thereby effectively avoiding damage to the upper or lower mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a powder metallurgy die upper and lower special-shaped end surface polishing fixture according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the assembly structure of a powder metallurgy die upper and lower profile end surface polishing jig according to an embodiment of the present invention; Figure 3 for Figure 2 A schematic cross-sectional view of a powder metallurgy die upper and lower profile end surface polishing jig according to an embodiment of the present invention; Figure 4 for Figure 2 A schematic diagram of the upper mold or lower mold structure of a powder metallurgy mold upper and lower special-shaped end surface polishing fixture according to an embodiment of the present invention; Figure 5 for Figure 2 A schematic diagram of the enlarged structure of part A of a powder metallurgy die upper and lower special-shaped end surface polishing fixture according to an embodiment of the present invention; Figure 6 The present invention is a schematic flow chart of a method for using a powder metallurgy mold upper and lower special-shaped end surface polishing fixture according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0018] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is said to be "directly" connected to another element, there is no intermediate element.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, a powder metallurgy mold upper and lower type special-shaped end face polishing jig includes a jig body 1, the jig body 1 is provided with a mold upper and lower type accommodating hole 11 in the vertical direction, and a notch 12 is symmetrically provided along the X-axis direction of the mold upper and lower type accommodating hole 11, the depth of the notch 12 is adapted to the height of the chamfered tip 211 of the special-shaped end face, the inclination angle of the inclined surface of the notch 12 is adapted to the inclination angle of the inclined surface of the chamfered tip 211 of the special-shaped end face, and an accommodating portion 13 of the chamfered tip 211 of the special-shaped end face is formed symmetrically in the Y-axis direction of the mold upper and lower type accommodating hole 11, and a mold upper and lower type fixing hole 14 is provided at a preset position on the side of the jig body 1, and the mold upper and lower type fixing hole 14 is connected to the mold upper and lower type accommodating hole 11.

[0021] like Figure 4 As shown, the upper and lower mold accommodating holes 11 are through holes along the vertical direction of the fixture body 1, which is convenient for the upper and lower molds of the mold that need to be polished to enter or move out of the fixture body 1; the depth of the notch 12 is adapted to the height of the chamfered tip 211 of the special-shaped end face, and the inclination angle of the inclined surface 121 of the notch 12 is adapted to the inclination angle of the inclined surface of the chamfered tip 211 of the special-shaped end face, which is convenient for polishing the chamfered tip 211 during polishing, and will not hinder the polishing of the chamfered tip 211. The notch 12 is an inverted trapezoidal structure. The structure is connected to the upper and lower mold accommodating holes 11 of the mold, and the width of the notch 12 is adapted to the width of the special-shaped end face 21; the accommodating portion 13 is used to accommodate the chamfered tip 211 during polishing to prevent the chamfered tip 211 from protruding from the jig during polishing; the upper and lower mold fixing holes 14 of the mold are used to fix the upper or lower mold 2 of the mold to be polished through external fixing parts, and the upper and lower mold fixing holes 14 of the mold are provided with internal threads, which are threadedly matched with the external threads of the external fixing parts, and the external fixing parts can be bolts.

[0022] When it is necessary to polish the special-shaped end faces of the upper and lower molds of the mold, the upper mold or lower mold to be polished is inserted from the upper and lower mold receiving holes 11 of the mold, so that the special-shaped end faces of the upper and lower molds to be polished first enter the upper and lower mold receiving holes 11 of the mold, and the upper and lower molds to be polished move along the upper and lower mold receiving holes 11 toward the top of the jig body 1 until the chamfered tip 211 of the upper and lower molds to be polished is completely accommodated in the accommodating portion 13. At this time, the upper and lower molds to be polished move to the polishing position, and the external fixing parts enter the jig body 1 through the upper and lower mold fixing holes 14 of the mold until they abut against the side faces of the upper and lower molds to be polished, and the upper and lower molds to be polished are fixed in the jig body 1 to avoid movement during the polishing process. After the upper and lower molds to be polished are fixed in the jig body 1, the end faces of the upper and lower molds to be polished can be polished.

[0023] In this way, a powder metallurgy mold upper and lower profile end surface polishing jig, the jig body 1 is provided with a mold upper and lower profile accommodating hole 11 in the vertical direction, and a notch 12 is symmetrically provided along the X-axis direction of the mold upper and lower profile accommodating hole 11. The depth of the notch 12 is adapted to the height of the chamfered tip 211 of the profiled end surface 21, and the inclination angle of the notch slope 121 is adapted to the inclination angle of the slope of the chamfered tip 211 of the profiled end surface 21. A symmetrically arranged accommodating portion 13 of the chamfered tip 211 of the profiled end surface 21 is formed in the Y-axis direction of the mold upper and lower profile accommodating hole 11. When polishing the upper or lower profile end surface of the mold, the chamfered tip 211 of the profiled end surface 21 is accommodated in the accommodating portion of the jig body 1. The accommodating portion 13 can effectively protect the chamfered tip 211 of the profiled end surface 21 to avoid wear or deformation of the chamfered tip 211 during the polishing process, thereby effectively avoiding damage to the upper or lower mold.

[0024] like Figure 5 As shown, in one embodiment, the top surface of the fixture body is provided with a limit assembly 3, and the limit assembly 3 includes a rotating member 31 and a baffle 32, one end of the baffle 32 is installed on the rotating member 31, and the bottom surface of the other end of the baffle 32 is in contact with the top surface of the fixture body 1 and is at least partially located at the top of the accommodating portion 13 in the vertical direction, and the rotating member 31 can drive the baffle 32 to rotate along a preset direction.

[0025] The baffle 32 is a thin sheet made of hard material. When polishing is required, the chamfered tip 211 needs to be accommodated in the accommodating portion 13, and the top surface of the chamfered tip 211 and the top surface of the accommodating portion 13 are at the same horizontal plane, which indicates that the chamfered tip 211 is installed in place, and the upper mold or lower mold to be polished is positioned. However, during the movement of the chamfered tip 211 of the upper mold or lower mold to be polished in the accommodating hole 11 of the upper and lower molds of the mold, debugging is required to make the top surface of the chamfered tip 211 and the top surface of the accommodating portion 13 at the same horizontal plane, which is not efficient. Therefore, the position limiting assembly 3 is used to limit the installation position of the chamfer tip 211. When polishing is required, the rotating member 31 drives the baffle 32 to rotate to the preset position. The bottom surface of the baffle 32 is in contact with the top surface of the fixture body 1 and at least partially at the top of the accommodating portion 13 in the vertical direction. After the chamfer tip 211 of the upper or lower mold to be polished moves from the upper and lower mold accommodating holes 11 to the accommodating portion 13 and abuts against the baffle 32, it is proved that the chamfer tip 211 has been installed in place, and the upper or lower mold to be polished can be fixed without repeatedly adjusting the position of the chamfer tip 211 in the accommodating portion 13, thereby improving the installation efficiency of the upper or lower mold to be polished. After the upper or lower mold to be polished is fixed, the rotating member 31 drives the baffle 32 to rotate by a preset angle, and the baffle 32 is removed from the top surface of the chamfer tip 211 to avoid affecting the polishing of the chamfer tip 211.

[0026] In one of the embodiments, the powder metallurgy mold upper and lower special-shaped end face polishing jig also includes a flexible buffer plate 4, which is installed in the inner layer of the accommodating portion 13 and is used to wrap the outer layer of the chamfered tip 211 of the special-shaped end face 21; the flexible buffer plate 4 is made of one or more of silicone, silicone rubber or polyurethane rubber.

[0027] The flexible buffer plate 4 has a certain elasticity and plasticity. If there is a small special-shaped structure on the outer layer of the special-shaped end surface 21, the small special-shaped structure is easily damaged when the outer layer of the special-shaped end surface 21 is attached to the inner layer of the accommodating portion 13. In this way, through the provision of the flexible buffer plate 4, the small special-shaped structure can be accommodated in the flexible buffer plate 4 and wrapped in the flexible buffer plate 4, so as to effectively protect the small special-shaped structure and avoid damage.

[0028] In one embodiment, the jig body 1 has a positioning notch 15 on one side close to the notch 12 , and the positioning notch 15 is used for positioning the jig when it is installed on the polishing equipment.

[0029] In this way, by setting the positioning notch 15, the jig can be quickly installed on the polishing equipment, thereby improving the installation efficiency of the jig.

[0030] In one embodiment, the fixture body 1 is made of carbon fiber or titanium alloy material.

[0031] The density of carbon fiber is only 1 / 4 of that of steel, but its tensile strength can reach 7-9 times that of steel, and its elastic modulus is equivalent to that of steel. This feature allows the fixture body 1 to significantly reduce weight while maintaining high rigidity. Carbon fiber has extremely strong corrosion resistance to chemical media such as acids and alkalis, and can resist erosion by polishing fluids, coolants, etc., thus extending the life of the fixture.

[0032] The density of titanium alloy is about 57% of that of steel, but its strength is comparable to that of high-strength steel, and it has good toughness. This makes the jig both light and able to withstand dynamic loads (such as vibration and impact) during the polishing process, avoiding structural fatigue or deformation caused by long-term use.

[0033] like Figure 5 As shown, a method for using a powder metallurgy mold upper and lower profile end surface polishing fixture is applied to the powder metallurgy mold upper and lower profile end surface polishing fixture, and the processing method includes: S1. Insert the special-shaped end surface of the upper mold or lower mold to be polished into the fixture body from the bottom of the upper and lower mold accommodating holes of the mold; S2, so that the chamfered tip of the special-shaped end surface is accommodated in the accommodating portion during the movement of the upper and lower accommodating holes of the mold; S3. The external fixing part is in contact with the upper mold or lower mold to be polished through the upper and lower mold fixing holes of the mold.

[0034] The optional items in the above-mentioned fixture embodiment are also applicable to this embodiment and will not be described in detail here.

[0035] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A powder metallurgy mold upper and lower special-shaped end surface polishing fixture, characterized by: The jig body comprises a jig body, wherein the jig body is provided with a mold upper and lower type accommodating hole in the vertical direction, and a notch is symmetrically provided along the X-axis direction of the mold upper and lower type accommodating hole, wherein the depth of the notch is adapted to the height of the chamfered tip of the special-shaped end face, and the inclination angle of the inclined surface of the notch is adapted to the inclination angle of the inclined surface of the chamfered tip of the special-shaped end face, and an accommodating portion of the chamfered tip of the special-shaped end face is symmetrically formed in the Y-axis direction of the mold upper and lower type accommodating hole, and a mold upper and lower type fixing hole is provided at a preset position on the side of the jig body, and the mold upper and lower type fixing hole is connected to the mold upper and lower type accommodating hole.

2. A powder metallurgy mold upper and lower special-shaped end surface polishing jig according to claim 1, characterized in that: The top surface of the fixture body is provided with a limiting assembly, and the limiting assembly includes a rotating member and a baffle, one end of the baffle is mounted on the rotating member, and the bottom surface of the other end of the baffle is in contact with the top surface of the fixture body and is at least partially located at the top of the accommodating portion in the vertical direction, and the rotating member can drive the baffle to rotate along a preset direction.

3. A powder metallurgy mold upper and lower special-shaped end surface polishing jig according to claim 1, characterized in that: The notch is an inverted trapezoidal structure and is connected to the upper and lower accommodating holes of the mold.

4. The powder metallurgy mold upper and lower special-shaped end surface polishing jig according to claim 1, characterized in that: The powder metallurgy mold upper and lower special-shaped end surface polishing fixture also includes a flexible buffer plate, which is installed on the inner layer of the accommodating part and is used to wrap the outer layer of the chamfered tip of the special-shaped end surface.

5. A powder metallurgy mold upper and lower special-shaped end surface polishing jig according to claim 4, characterized in that: The flexible buffer plate is made of one or more of silica gel, silicone rubber or polyurethane rubber.

6. The powder metallurgy mold upper and lower special-shaped end surface polishing jig according to claim 1, characterized in that: The fixture body has a positioning notch on one side close to the notch, and the positioning notch is used for positioning the fixture when it is installed on the polishing equipment.

7. The powder metallurgy mold upper and lower special-shaped end surface polishing jig according to claim 1, characterized in that: The width of the notch is matched with the width of the special-shaped end surface.

8. The powder metallurgy mold upper and lower special-shaped end surface polishing jig according to claim 1, characterized in that: The fixture body is made of carbon fiber or titanium alloy material.

9. A method for using a powder metallurgy mold upper and lower special-shaped end surface polishing fixture, characterized in that: The powder metallurgy die upper and lower special-shaped end surface polishing fixture as claimed in any one of claims 1 to 8, wherein the processing method comprises: Insert the special-shaped end surface of the upper mold or lower mold to be polished into the jig body from the bottom of the upper and lower mold receiving holes of the mold; The chamfered tip of the special-shaped end surface is accommodated in the accommodation portion during the movement of the upper and lower accommodation holes of the mold; The external fixing part is in contact with the upper mold or the lower mold to be polished through the upper and lower mold fixing holes of the mold.

10. The method for using the powder metallurgy mold upper and lower special-shaped end surface polishing fixture as claimed in claim 9, characterized in that: The upper and lower fixing holes of the mold are provided with internal threads which are threadably matched with the external threads of the external fixing piece.

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