A guide mechanism for a stamping die

Abstract

The invention discloses a guide mechanism of a stamping die, comprising an upper die frame and a lower die frame, an upper die plate is arranged below the upper die frame, a lower die plate matched with the upper die plate is arranged above the lower die frame, the upper die frame comprises an upper mounting plate and a lower pressing plate arranged at intervals, the upper die plate is arranged below the lower pressing plate, four corners of the upper mounting plate are respectively vertically provided with guide sleeves that penetrate up and down, each guide sleeve is coaxially provided with a guide rod that can move up and down, the lower end of the guide rod extends out of the guide sleeve and is fixedly connected with the lower pressing plate, and is characterized in that an annular movable gap is arranged between the guide rod and the guide sleeve, and a high temperature resistant rubber ring is filled in the annular movable gap. The advantages are simple and compact structure, low cost, and stable and precise guiding and positioning.

Description

Technical Field

[0001] The invention relates to a guiding mechanism, in particular to a guiding mechanism of a stamping die. Background Art

[0002] Today's stamping dies usually use an upper die frame to carry an upper die plate to close the lower die plate on the lower die frame. During the stamping process, the shear force of the punched sheet will cause the upper die frame or the lower die frame to be subjected to lateral displacement, resulting in a decrease in stamping accuracy. Therefore, for stamping dies with high precision requirements, how to avoid the above-mentioned lateral displacement has become an urgent problem to be solved.

[0003] The traditional structure is usually a guide mechanism formed by the cooperation of guide columns and guide holes to prevent lateral displacement. For cold die stamping, this guide mechanism can provide relatively stable guidance in a short time, but the mold will generate heat during operation. After long-term operation, the heat will continue to increase, and the generated heat will continue to be transmitted to the upper mold frame. The accumulated heat conduction can easily cause the upper mold frame to expand and deform, causing the position of the guide column connected to it to change, thereby causing the operation of the guide mechanism to become stuck; and for hot die stamping, since the mold itself needs to be heated, the stamping mold as a whole needs to bear a large amount of heat, which will also cause the upper mold frame to expand and deform, causing the position of the guide column to change, affecting the operation of the guide mechanism, which is not conducive to the quality of product stamping.

[0004] At present, the common methods for solving the above problems usually include the following two methods: the first is to add a cooling system, and use the cooling system to cool the guide mechanism specifically. This method is costly and has a high risk of failure, which makes the overall maintenance cost high. In addition, the addition of a cooling system will inevitably increase the space for the installation of the cooling system, resulting in a larger overall equipment volume and occupying more usable space; the second is to enlarge the internal gap of the guide mechanism, that is, to increase the gap between the guide column and the guide hole. When the upper mold frame expands and deforms due to heat accumulation, the above-mentioned large gap setting can prevent the guide column from getting stuck during the up and down movement. However, this large gap matching method can easily cause the upper mold plate to move left and right, resulting in a certain deviation in the position of the upper and lower molds, which is also not conducive to the quality of product stamping. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a guiding mechanism for a stamping die which has a simple and compact structure, low cost and can achieve stable and precise guiding.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A guiding mechanism for a stamping die comprises an upper die frame and a lower die frame, wherein an upper die plate is arranged below the upper die frame, and a lower die plate matched with the upper die plate is arranged above the lower die frame, wherein the upper die frame comprises an upper mounting plate and a lower pressing plate spaced apart from each other, wherein the upper die plate is mounted below the lower pressing plate, and guide sleeves penetrating upward and downward are vertically arranged at the four corners of the upper mounting plate, wherein a guide rod is coaxially arranged in each guide sleeve so as to be movable upward and downward, wherein the lower end of the guide rod extends out of the guide sleeve and is fixedly connected to the lower pressing plate, and an annular movable gap is arranged between the guide rod and the guide sleeve, and a high-temperature resistant rubber ring is filled in the annular movable gap.

[0008] The upper end surface and the lower end surface of the guide sleeve are respectively covered with an upper sealing ring and a lower sealing ring, the upper part and the lower part of the inner wall of the guide sleeve are respectively raised with an upper positioning ring and a lower positioning ring, a high temperature resistant rubber ring is arranged between the upper sealing ring and the upper positioning ring, and a high temperature resistant rubber ring is arranged between the lower sealing ring and the lower positioning ring, the inner diameters of the upper sealing ring, the lower sealing ring, the upper positioning ring and the lower positioning ring are all larger than the outer diameter of the guide rod, the inner diameter of the high temperature resistant rubber ring matches the outer diameter of the guide rod, and the outer diameter of the high temperature resistant rubber ring matches the inner diameter of the guide sleeve. A stable installation and positioning space is provided for the installation of the high temperature resistant rubber ring through the sealing ring and the positioning ring, ensuring that the high temperature resistant rubber ring can be stably installed; the inner diameter of the high temperature resistant rubber ring matches the outer diameter of the guide rod, and the outer diameter of the high temperature resistant rubber ring matches the inner diameter of the guide sleeve, ensuring that the high temperature resistant rubber ring can completely fill the gap between the guide sleeve and the guide rod after installation, ensuring the centering guidance of the guide rod during operation; a high temperature resistant rubber ring is arranged above and below respectively, so that the overall force is evenly distributed, ensuring the stability of the guide.

[0009] The inner wall of the high temperature resistant rubber ring is recessed outward and is provided with an inner concave ring. The inner concave ring forms an upper positioning convex ring and a lower positioning convex ring spaced apart from each other on the inner wall of the high temperature resistant rubber ring. The upper end face of the upper positioning convex ring is an inclined end face tilted downward from the outside to the inside, and the lower end face of the lower positioning convex ring is an inclined end face tilted upward from the outside to the inside. The above structure reduces the contact area between the high temperature resistant rubber ring and the guide rod, reduces the friction between the guide rod and the high temperature resistant rubber ring when the guide rod moves up and down, effectively reduces the influence of the installation of the high temperature resistant rubber ring on the up and down movement of the guide rod, and ensures that the entire mechanism can operate in an orderly manner.

[0010] The lower end surface of the high temperature resistant rubber ring is provided with an upwardly concave annular tightening gap. Due to the existence of this gap, after the heat resistant rubber ring expands due to heat, the overall deformation is reduced by squeezing the gap, thereby improving the stability and accurate guidance of the heat resistant rubber ring at high temperature.

[0011] A heat insulation board is arranged between the lower pressing plate and the upper mold plate, and the upper end surface of the heat insulation board is fixedly fitted on the lower end surface of the lower pressing plate. During hot die stamping, the heat insulation board can isolate part of the heat from the upper mold plate to a certain extent, thereby reducing the influence of heat on the lower pressing plate, and further ensuring stable and precise guidance.

[0012] A template transfer block is provided between the heat insulation board and the upper template, the template transfer block is fixedly mounted below the heat insulation board, and the upper template is detachably mounted below the template transfer block. The template transfer block is used to replace the upper template according to different stamping products, so that the entire mechanism has good universal performance.

[0013] The upper end of the lower pressing plate is provided with a mounting support at a position corresponding to the guide rod, and the lower end of each guide rod extends out of the guide sleeve and is fixedly mounted in the mounting support at the corresponding position. The mounting support enables the lower end of the guide rod to be stably mounted on the lower pressing plate.

[0014] The guide sleeve is provided with a mounting seat on the outside, and the mounting seat is fixedly mounted on the upper end surface of the upper mounting plate. The guide sleeve can be stably mounted on the upper mounting plate through the mounting seat.

[0015] The interior of the mounting seat is provided with a mounting cavity which is through from top to bottom and matches with the guide sleeve. The mounting cavity is divided into a coaxial upper mounting part and a lower mounting part from top to bottom. The inner diameter of the upper mounting part matches with the outer diameter of the guide sleeve. A limiting ring is provided on the guide sleeve protruding outward. The inner diameter of the lower mounting part matches with the outer diameter of the limiting ring. The limiting ring is embedded in the lower mounting part. The lower end face of the limiting ring fits with the upper end face of the upper mounting plate. The upper end face of the limiting ring fits with the end face of the lower mounting part. The cooperation between the lower mounting part and the limiting ring is used to limit the installation position of the guide sleeve on the upper mounting plate, so as to prevent the guide sleeve from moving up and down with the up and down movement of the guide rod during operation, so as to realize the stable fixed installation of the guide sleeve. When installing specifically, the fitting installation between the lower end face of the limiting ring and the upper end face of the upper mounting plate is realized by pressing down the mounting seat.

[0016] A bushing is provided between the guide rod and the guide sleeve, the bushing is provided in the annular movable gap, the bushing is provided between the upper positioning ring and the lower positioning ring, and the guide rod and the bushing are clearance-matched. The bushing limits the design positions of the upper positioning ring and the lower positioning ring; the guide rod and the bushing are generally clearance-matched, so that when the guide rod expands under the influence of high temperature, the existence of the bushing will not affect the up and down movement of the guide rod.

[0017] Compared with the prior art, the advantages of the present invention are: a high-temperature resistant rubber ring is filled in the annular movable gap between the guide rod and the guide sleeve, and the annular movable gap is filled by the high-temperature resistant rubber ring. When used for cold die stamping, the high-temperature resistant rubber ring ensures that the guide rod will not move left and right during the up and down movement. When used for hot die stamping, the deformation of the lower pressure plate of the entire mechanism caused by heating is converted into the deformation of the high-temperature resistant rubber ring itself through the extrusion of the guide rod and the high-temperature resistant rubber ring, so that whether it is cold die stamping or hot die stamping, the long-term stable operation of the guide mechanism can be guaranteed. The structure is simple and compact, and stable and precise guide positioning can be achieved. In addition, the overall structure of the above-mentioned guide mechanism does not have high requirements on the coordination and processing between the various components, which effectively reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 The schematic diagram of the cross-sectional structure of the present invention with the upper mold plate, the lower mold frame and the lower mold plate removed;

[0020] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 4 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the high temperature resistant rubber ring in the present invention;

[0023] Figure 6 It is a schematic cross-sectional structural diagram of the mounting seat in the present invention. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below with reference to the accompanying drawings.

[0025] like Figures 1 to 6As shown, a guiding mechanism of a stamping die comprises an upper die frame 1 and a lower die frame 2, an upper die plate 3 is arranged below the upper die frame 1, a lower die plate 4 matched with the upper die plate 3 is arranged above the lower die frame 2, the upper die frame 1 comprises an upper mounting plate 101 and a lower pressing plate 102 which are spaced apart from each other, the upper die plate 3 is installed below the lower pressing plate 102, guide sleeves 5 which penetrate vertically are respectively arranged at the four corners of the upper mounting plate 101, a guide rod 6 is coaxially arranged in each guide sleeve 5 so as to be movable vertically, the lower end of the guide rod 6 extends out of the guide sleeve 5 and is fixedly connected to the lower pressing plate 102, an annular movable gap 56 is arranged between the guide rod 6 and the guide sleeve 5, and a high temperature resistant rubber ring 7 is filled in the annular movable gap 56.

[0026] In this specific embodiment, the upper end surface and the lower end surface of the guide sleeve 5 are respectively covered with an upper sealing ring 51 and a lower sealing ring 52, and the upper and lower parts of the inner wall of the guide sleeve 5 are respectively protruded with an upper positioning ring 53 and a lower positioning ring 54, a high temperature resistant rubber ring 7 is arranged between the upper sealing ring 51 and the upper positioning ring 53, and a high temperature resistant rubber ring 7 is arranged between the lower sealing ring 52 and the lower positioning ring 54. The inner diameters of the upper sealing ring 51, the lower sealing ring 52, the upper positioning ring 53 and the lower positioning ring 54 are all larger than the outer diameter of the guide rod 6, the inner diameter of the high temperature resistant rubber ring 7 matches the outer diameter of the guide rod 6, and the outer diameter of the high temperature resistant rubber ring 7 matches the inner diameter of the guide sleeve 5.

[0027] In this specific embodiment, the inner wall of the high temperature resistant rubber ring 7 is recessed outward to form an inner concave ring 71, and the inner concave ring 71 forms an upper positioning convex ring 72 and a lower positioning convex ring 73 spaced apart from each other on the inner wall of the high temperature resistant rubber ring 7. The upper end face of the upper positioning convex ring 72 is an inclined end face inclined downward from the outside to the inside, and the lower end face of the lower positioning convex ring 73 is an inclined end face inclined upward from the outside to the inside.

[0028] In this specific embodiment, the lower end surface of the high temperature resistant rubber ring 7 is provided with an upwardly recessed annular tightening gap 74 .

[0029] In this specific embodiment, a heat insulation plate 103 is arranged between the lower pressing plate 102 and the upper mold plate 3 , and the upper end surface of the heat insulation plate 103 is fixedly fitted on the lower end surface of the lower pressing plate 102 .

[0030] In this specific embodiment, a template adapter block 104 is provided between the heat insulation board 103 and the upper template 3 . The template adapter block 104 is fixedly installed below the heat insulation board 103 , and the upper template 3 is detachably installed below the template adapter block 104 .

[0031] In this specific embodiment, a mounting bracket 11 is provided on the upper end surface of the lower pressing plate 102 at a position corresponding to the guide rod 6 , and the lower end of each guide rod 6 extends out of the guide sleeve 5 and is fixedly mounted in the mounting bracket 11 at the corresponding position.

[0032] In this specific embodiment, a mounting seat 501 is disposed outside the guide sleeve 5 , and the mounting seat 501 is fixedly mounted on the upper end surface of the upper mounting plate 101 .

[0033] In this specific embodiment, the interior of the mounting seat 501 is provided with a mounting cavity that passes through from top to bottom and cooperates with the guide sleeve 5. The mounting cavity is divided into a coaxial upper mounting part 502 and a lower mounting part 503 from top to bottom. The inner diameter of the upper mounting part 502 cooperates with the outer diameter of the guide sleeve 5. A limiting ring 55 is provided on the guide sleeve 5 to protrude outward. The inner diameter of the lower mounting part 503 cooperates with the outer diameter of the limiting ring 55. The limiting ring 55 is embedded in the lower mounting part 503. The lower end face of the limiting ring 55 is in contact with the upper end face of the upper mounting plate 101, and the upper end face of the limiting ring 55 is in contact with the end face of the lower mounting part 503.

[0034] In this specific embodiment, a bushing 8 is provided between the guide rod 6 and the guide sleeve 5. The bushing 8 is provided in the annular movable gap 56. The bushing 8 is provided between the upper positioning ring 53 and the lower positioning ring 54. The guide rod 6 and the bushing 8 are clearance-fitted.

Claims

1. A guide mechanism for a stamping die, comprising an upper die frame and a lower die frame, wherein an upper die plate is arranged below the upper die frame, and a lower die plate matched with the upper die plate is arranged above the lower die frame, wherein the upper die frame comprises an upper mounting plate and a lower pressing plate arranged at intervals from top to bottom, wherein the upper die plate is installed below the lower pressing plate, and guide sleeves penetrating from top to bottom are vertically arranged at the four corners of the upper mounting plate, wherein a guide rod is coaxially arranged in each guide sleeve so as to be movable up and down, and the lower end of the guide rod extends out of the guide sleeve and is fixedly connected to the lower pressing plate, and wherein the guide rod is characterized in that An annular movable gap is provided between the guide rod and the guide sleeve, and a high temperature resistant rubber ring is filled in the annular movable gap; The upper end surface and the lower end surface of the guide sleeve are respectively covered with an upper sealing ring and a lower sealing ring, the upper part and the lower part of the inner wall of the guide sleeve are respectively raised with an upper positioning ring and a lower positioning ring, a high temperature resistant rubber ring is arranged between the upper sealing ring and the upper positioning ring, and a high temperature resistant rubber ring is arranged between the lower sealing ring and the lower positioning ring, the inner diameters of the upper sealing ring, the lower sealing ring, the upper positioning ring and the lower positioning ring are all larger than the outer diameter of the guide rod, the inner diameter of the high temperature resistant rubber ring matches the outer diameter of the guide rod, and the outer diameter of the high temperature resistant rubber ring matches the inner diameter of the guide sleeve; The inner wall of the high temperature resistant rubber ring is recessed outwards and provided with an inner concave ring, and the inner concave ring forms an upper positioning convex ring and a lower positioning convex ring spaced apart from each other on the inner wall of the high temperature resistant rubber ring, and the upper end face of the upper positioning convex ring is an inclined end face inclined downward from the outside to the inside, and the lower end face of the lower positioning convex ring is an inclined end face inclined upward from the outside to the inside; The lower end surface of the high temperature resistant rubber ring is provided with an upwardly concave annular tightening gap; The annular movable gap is filled with a high-temperature resistant rubber ring. When used in cold die stamping, the high-temperature resistant rubber ring ensures that the guide rod will not move left and right during the up and down movement. When used in hot die stamping, the deformation of the lower pressure plate caused by heating is converted into the deformation of the high-temperature resistant rubber ring itself through the extrusion of the guide rod and the high-temperature resistant rubber ring, so that whether it is cold die stamping or hot die stamping, the long-term stable operation of the guide mechanism can be guaranteed.

2. A guide mechanism for a stamping die as claimed in claim 1, characterized in that A heat insulation board is arranged between the lower pressing plate and the upper mold plate, and the upper end surface of the heat insulation board is fixedly fitted on the lower end surface of the lower pressing plate.

3. A guide mechanism for a stamping die as claimed in claim 2, characterized in that A template transfer block is arranged between the heat insulation board and the upper template. The template transfer block is fixedly installed below the heat insulation board, and the upper template is detachably installed below the template transfer block.

4. A guide mechanism for a stamping die as claimed in claim 1, characterized in that A mounting support is arranged on the upper end surface of the lower pressure plate at a position corresponding to the guide rod, and the lower end of each guide rod extends out of the guide sleeve and is fixedly mounted in the mounting support at the corresponding position.

5. A guide mechanism for a stamping die as claimed in claim 1, characterized in that A mounting seat is arranged outside the guide sleeve, and the mounting seat is fixedly mounted on the upper end surface of the upper mounting plate.

6. A guide mechanism for a stamping die as claimed in claim 5, characterized in that The interior of the mounting seat is provided with a mounting cavity which passes through from top to bottom and matches with the guide sleeve. The mounting cavity is divided into a coaxial upper mounting part and a lower mounting part from top to bottom. The inner diameter of the upper mounting part matches with the outer diameter of the guide sleeve. A limiting ring is provided on the outward protrusion of the guide sleeve. The inner diameter of the lower mounting part matches with the outer diameter of the limiting ring. The limiting ring is embedded in the lower mounting part. The lower end face of the limiting ring fits with the upper end face of the upper mounting plate, and the upper end face of the limiting ring fits with the end face of the lower mounting part.

7. A guide mechanism for a stamping die as claimed in claim 1, characterized in that A bushing is arranged between the guide rod and the guide sleeve, the bushing is arranged in the annular movable gap, the bushing is arranged between the upper positioning ring and the lower positioning ring, and the guide rod and the bushing are clearance-fitted.

Images