Die clamping device

Abstract

The utility model discloses a die clamping device which comprises a forming die, a reserved cutter groove which forms a circle in a surrounding mode is formed in the top of the forming die, a cutter groove and a hole groove which are arranged at the position, corresponding to a composite part, of the interior of the reserved cutter groove, and installation plates are installed on the periphery of the top of the forming die. An adjusting assembly is arranged between the mounting plate and the forming die and used for adjusting the distance between the mounting plate and the center point of the forming die, and a plurality of clamping devices are mounted at the top of the mounting plate. The machining device has the advantages that the composite material laminated plate is clamped through the clamping device and used for preventing the composite material laminated plate from moving in the machining process, the composite material laminated plate is directly clamped on the forming die and is subjected to machining such as milling and drilling, the machining precision is higher, and the machining efficiency is improved. The step of installing the demolded part on the universal flexible clamping device is omitted, working hours are saved, certain production efficiency is improved, and certain cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of composite parts processing molds, in particular to a mold clamping device. Background Art

[0002] The manufacture of composite laminates usually involves laying and curing on a tooling mold before demoulding, and then performing surface inspection, weighing, and net size machining after demoulding. This method of demoulding first and then machining usually requires the use of a flexible fixture. The flexible fixture only clamps the entire surface through discrete support points, so that after the edge of the part is milled / the wall panel is drilled, it is inevitable that the wall panel will be deformed, which ultimately leads to an increase in the surface tolerance. In addition, the composite parts that are demoulded first will inevitably rebound, and at this time, machining and milling based on the theoretical shape will deviate, and a set of flexible fixtures are required. The method of demoulding first and then machining will deviate during machining and milling, affecting the processing accuracy. In addition, an additional set of flexible fixtures needs to be purchased, increasing production costs. Therefore, the applicant designs a mold clamping device that adopts a processing method of in-mold machining, that is, machining first and then demoulding. Because the deformation of the wall panel surface affected by the milling / drilling tool can be minimized under the overall clamping of the molding tool, the surface quality of the wall panel can be improved. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a mold clamping device, which is used to clamp a composite material laminate to prevent the composite material laminate from moving during the machining process. By clamping the composite material laminate directly on the molding mold and performing machining such as milling and drilling, the machining accuracy is higher, and the step of installing the demolded parts on the universal flexible clamping device is eliminated, thereby saving working hours, improving production efficiency to a certain extent, and saving costs to a certain extent.

[0004] The utility model provides the following technical solution, a mold clamping device, comprising: a molding mold, a top of the molding mold is provided with a reserved knife groove in a circle, the reserved knife groove is provided inside the reserved knife groove corresponding to the composite part and the knife groove and hole groove at the opening of the composite part are provided, the top of the molding mold is equipped with a mounting plate all around, an adjustment component is provided between the mounting plate and the molding mold, the adjustment component is used to adjust the distance between the mounting plate and the center point of the molding mold, a plurality of clamping devices are installed on the top of the mounting plate, and the clamping devices are used to clamp the composite part on the top of the molding mold.

[0005] Preferably, the reserved knife grooves, the knife grooves at the openings of the composite parts and the hole grooves are all filled with sacrificial materials.

[0006] Preferably, a plurality of tool retreat grooves are provided at the reserved tool groove.

[0007] Preferably, the adjustment assembly includes an adjusting bolt, and a waist-shaped hole is opened on the mounting plate corresponding to the adjusting bolt. The waist-shaped hole extends along the edge of the forming mold to the middle position thereof. The adjusting bolt passes through the waist-shaped hole and is fixedly connected to the forming mold. Multiple groups of waist-shaped holes and adjusting bolts are provided on each mounting plate.

[0008] Preferably, the clamping device includes a mounting base fixedly connected to the top of the mounting plate, a horizontal clamping arm movably hinged to the top of the mounting base, a clamping member installed at the end of the horizontal clamping arm away from the mounting base, and a handle movably hinged on the mounting base, and a connecting plate movably hinged between the handle and the horizontal clamping arm.

[0009] Preferably, a long through slot is provided on the horizontal clamping arm, and the clamping member includes a vertical adjustment screw passing through the long through slot, both ends of the vertical adjustment screw extend to the outside of the long through slot and are threadedly connected with an adjustment nut, and a stop gasket is provided between the adjustment nut and the horizontal clamping arm, and a pressure block is fixedly connected to the bottom of the vertical adjustment screw.

[0010] Preferably, the clamping device further comprises a clamping pad, which is arranged between the pressing block and the composite part.

[0011] Preferably, a pair of lifting rings are symmetrically fixedly connected to both sides of the forming mold.

[0012] Preferably, the forming die is provided with a pair of forklift holes penetrating the forming die.

[0013] Preferably, positioning holes are provided at the four corners of the top of the forming mold.

[0014] The beneficial effects of the utility model are:

[0015] 1. The clamping device is used to clamp the composite material laminate on the forming mold to prevent the composite material laminate from moving during the machining process. By clamping the composite material laminate directly on the forming mold and performing machining such as milling and drilling, the net size of the parts and the position accuracy of the drilling holes are higher than the method of demolding first and then machining. In addition, the direct machining method on the forming mold can save the time of demolding and transferring the parts to the flexible fixture in conjunction with the forming mold, and save the step of installing the demolded parts to the universal flexible clamping device, saving working hours, improving certain production efficiency, and not requiring the purchase of an additional set of flexible fixtures, which also saves certain costs;

[0016] 2. During machining, the composite laminate can be supported on the entire surface, rather than the discrete point support of the general flexible clamping device, which makes the surface of the parts machined by the CNC machine almost non-deformed, thus improving the machining quality;

[0017] 3. Machining the edge of the composite laminate can release the rebound stress of the edge of the composite laminate, making it easier and more convenient to demold the composite laminate processed by the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the mold clamping device;

[0019] Figure 2 It is a schematic diagram of the top view of the forming mold structure;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the mounting plate and the clamping device;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the clamping device;

[0022] In the figure: 1. forming die; 2. reserved knife groove; 3. knife groove at the opening of composite parts; 4. hole groove; 5. knife back groove; 6. mounting plate; 601. waist hole; 602. adjustment bolt; 7. clamping device; 701. mounting seat; 702. horizontal clamping arm; 703. handle; 704. connecting plate; 705. clamping piece; 7051. stop washer; 7052. vertical adjustment screw; 7053. adjustment nut; 7054. pressure block; 706. clamping pad; 8. lifting ring; 9. forklift hole; 10. positioning hole. DETAILED DESCRIPTION

[0023] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0024] like Figures 1 to 4As shown, a mold clamping device includes: a molding mold 1, the molding mold 1 includes a mold base and a molding panel installed on the top of the mold base, the mold base plays a role in supporting the molding panel, and a partition structure or a truss structure can usually be used. The mold base is made of 4J36 Invar steel material, and the molding panel plays a role in supporting a composite material laminate during machining. The molding panel is made of Invar36 Invar steel material, and a reserved knife groove 2 is arranged in a circle on the top of the molding mold 1. The reserved knife groove 2 is provided with a knife groove 3 and a hole groove 4 at the opening of the composite part corresponding to the composite part. The top of the molding mold 1 is equipped with mounting plates 6 on all sides, and an adjustment component is arranged between the mounting plate 6 and the molding mold 1. The adjustment component is used to adjust the mounting plate 6 and the molding mold 1. The distance between the center point of the molding die 1 and the mounting plate 6 is a plurality of clamping devices 7 installed on the top of the mounting plate 6. The clamping devices 7 are used to clamp the composite parts on the top of the molding die 1. The clamping devices 7 are used to clamp the composite material laminates on the molding die 1 to prevent the composite material laminates from moving during the machining process. By clamping the composite material laminates directly on the molding die 1 and performing machining such as milling and drilling, the net size of the parts and the position accuracy of the drill holes are higher than the method of demolding first and then machining. In addition, the processing method of directly machining on the molding die 1 in combination with the molding die 1 can save the time of demolding and transferring the parts to the flexible fixture, thereby improving the production efficiency to a certain extent. There is no need to purchase an additional set of flexible fixtures, which also saves a certain amount of cost.

[0025] The reserved tool groove 2 is used to machine the boundary of the composite material laminate, the tool groove 3 at the opening of the composite part is used to machine the opening inside the composite material laminate, and the hole groove 4 is used to machine the machined hole inside the composite material laminate. The diameter of the hole groove is determined by the diameter of the hole and the required tolerance, and the depth is the diameter of the hole plus the length of the drill tip. The machining characteristics of the reserved tool groove 2, the tool groove 3 at the opening of the composite part and the hole groove 4 can be changed according to the actual design of the composite material laminate when designing the forming mold 1. The width of the reserved tool groove 2 and the tool groove 3 at the opening of the composite part is determined by factors such as the thickness of the composite part, the diameter of the selected tool and the required tolerance, and the depth is 2mm-2.5mm. During machining, three-axis to five-axis machine tools can be selected according to the processing characteristics.

[0026] The reserved knife groove 2, the knife groove 3 at the opening of the composite part and the hole groove 4 are all filled with sacrificial materials. The sacrificial material is Scotch-Weld EC-3515 A / B two-component epoxy adhesive. The sacrificial material is filled into the knife groove / hole groove pre-processed by the molding mold 1 and solidified, and then the composite material laminate is manufactured. After the composite material laminate is solidified, it is directly machined on the molding mold 1 by CNC machine. The sacrificial material needs to form a new tooling surface after solidification and is processed by the tool during machining. The sacrificial material filled in the knife groove / hole groove plays a role in protecting the molding mold 1 during CNC machining. At the same time, since the rebound stress of the edge of the part can be released after machining the edge of the part, the composite laminate processed by the mold is easier and more convenient when finally demolding.

[0027] A plurality of tool retreat grooves 5 are provided at the reserved tool groove 2. The tool retreat grooves 5 extend the reserved tool groove 2 toward the outside of the part at a certain interval. The tool retreat grooves 5 are used to discharge the debris generated during machining to prevent the debris from blocking the tool from moving forward.

[0028] The clamping device 7 includes a mounting base 701 fixedly connected to the top of the mounting plate 6, a horizontal clamping arm 702 movably hinged to the top of the mounting base 701, a clamping piece 705 installed at one end of the horizontal clamping arm 702 away from the mounting base 701, and a handle 703 movably hinged on the mounting base 701. A connecting plate 704 is movably hinged between the handle 703 and the horizontal clamping arm 702. When clamping the composite material laminate, the handle 703 is rotated, and the handle 703 drives the horizontal clamping arm 702 to rotate around the hinge point with the mounting base 701 through the connecting plate 704, so that the clamping piece 705 is pressed on the composite material laminate to clamp it. During machining, the composite material laminate is installed and clamped to prevent the composite material laminate from moving during machining.

[0029] The horizontal clamping arm 702 is provided with a long through slot, and the clamping member 705 includes a vertical adjustment screw 7052 passing through the long through slot, and both ends of the vertical adjustment screw 7052 extend to the outside of the long through slot and are threadedly connected with adjustment nuts 7053, and stop washers 7051 are provided between the adjustment nuts 7053 and the horizontal clamping arm 702, and a pressure block 7054 is fixedly connected to the bottom of the vertical adjustment screw 7052. The clamping device 7 also includes a clamping pad 706, which is arranged between the pressure block 7054 and the composite part. The clamping pad 706 is made of semi-rigid material, and the clamping pad 706 is used to clamp and fix the composite material laminate. The horizontal position and height of the vertical adjustment screw 7052 can be adjusted by loosening the adjusting nut 7053 to achieve clamping between the clamping pad 706 and the composite material laminate to ensure sufficient clamping force.

[0030] The adjustment component includes an adjusting bolt 602, and a waist-shaped hole 601 is opened on the mounting plate 6 corresponding to the adjusting bolt 602. The waist-shaped hole 601 extends along the edge of the forming mold 1 to its middle position. The adjusting bolt 602 passes through the waist-shaped hole 601 and is fixedly connected to the forming mold 1. Each mounting plate 6 is provided with multiple groups of waist-shaped holes 601 and adjusting bolts 602. By loosening the adjusting bolt 602, the position of the mounting plate 6 can be adjusted within the range of the waist-shaped hole 601, thereby adjusting the clamping position of the clamping piece 705 and the composite laminate to ensure the clamping effect. After removing the adjusting bolt 602, it is convenient to disassemble and install the mounting plate 6 and the clamping device 7. The structure is simple and easy to use.

[0031] Positioning holes 10 are provided at the four corners of the top of the molding die 1. When laser positioning is used, a positioning ball head is installed on the positioning hole 10 for positioning to improve machining accuracy.

[0032] A pair of lifting rings 8 are symmetrically fixedly connected on both sides of the molding mold 1. When the molding mold 1 needs to be transported by a crane, the lifting rings can be used to connect the sling. A pair of forklift holes 9 are opened on the molding mold 1 to pass through it. When the mold needs to be transported by a forklift, the forklift holes can be used for transportation, thereby improving convenience of use.

[0033] Implementation scheme: When in use, the composite laminate is laid and cured on the forming mold 1, and then the mounting plates 6 are installed on the four sides according to the machining requirements. By turning the handle 703, the handle 703 drives the horizontal clamping arm 702 to rotate around the hinge point with the mounting seat 701 through the connecting plate 704, so that the clamping pad 706 is pressed against the top of the composite laminate, the composite laminate is clamped, and then the composite laminate is machined by the machining equipment. It should be noted that when machining a certain side of the composite laminate, the mounting plate 6 and the clamping plate of the side to be machined need to be added. The device 7 is disassembled, leaving only the clamping pad 706 on the other side, so as to achieve clamping and simultaneous machining to prevent the composite material laminate from moving during the machining process. By clamping the composite material laminate directly on the molding die 1 and performing machining such as milling and drilling, the net size of the part and the position accuracy of the drill hole are higher than the method of demolding first and then machining. In addition, the processing method of directly machining on the molding die 1 in conjunction with the molding die 1 can save the time of demolding and transferring the part to the flexible fixture, thereby improving the production efficiency to a certain extent, eliminating the need to purchase an additional set of flexible fixtures, and saving a certain amount of cost.

[0034] Although the preferred embodiments of the present utility model have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present utility model.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these modifications and variations.

Claims

1. A mold clamping device, characterized in that: include: A molding mold, a circle of reserved knife grooves are provided on the top of the molding mold, knife grooves and hole grooves at the openings of the composite parts are provided inside the reserved knife grooves corresponding to the composite parts, mounting plates are installed on all sides of the top of the molding mold, an adjustment component is provided between the mounting plate and the molding mold, the adjustment component is used to adjust the distance between the mounting plate and the center point of the molding mold, a plurality of clamping devices are installed on the top of the mounting plate, the clamping devices are used to clamp the composite parts on the top of the molding mold.

2. A mold clamping device according to claim 1, characterized in that: The reserved tool grooves, the tool grooves at the openings of the composite parts and the hole grooves are all filled with sacrificial materials.

3. A mold clamping device according to claim 1, characterized in that: A plurality of tool withdrawal grooves are arranged at the reserved tool groove.

4. A mold clamping device according to claim 1, characterized in that: The adjustment component includes an adjusting bolt. A waist-shaped hole is opened on the mounting plate corresponding to the adjusting bolt. The waist-shaped hole extends along the edge of the forming mold to the middle position thereof. The adjusting bolt passes through the waist-shaped hole and is fixedly connected to the forming mold. Multiple groups of waist-shaped holes and adjusting bolts are arranged on each mounting plate.

5. A mold clamping device according to claim 1, characterized in that: The clamping device includes a mounting seat fixedly connected to the top of the mounting plate, a horizontal clamping arm movably hinged to the top of the mounting seat, a clamping piece installed on the end of the horizontal clamping arm away from the mounting seat, and a handle movably hinged on the mounting seat, and a connecting plate movably hinged between the handle and the horizontal clamping arm.

6. A mold clamping device according to claim 5, characterized in that: A long through slot is provided on the horizontal clamping arm, and the clamping part includes a vertical adjustment screw passing through the long through slot. Both ends of the vertical adjustment screw extend to the outside of the long through slot and are threadedly connected with an adjustment nut. A stop gasket is provided between the adjustment nut and the horizontal clamping arm, and a pressure block is fixedly connected to the bottom of the vertical adjustment screw.

7. A mold clamping device according to claim 5, characterized in that: The clamping device also includes a clamping pad, which is arranged between the pressing block and the composite part.

8. A mold clamping device according to claim 1, characterized in that: A pair of lifting rings are symmetrically fixedly connected to both sides of the forming mold.

9. A mold clamping device according to claim 1, characterized in that: A pair of forklift holes are provided on the forming die to penetrate the forming die.

10. A mold clamping device according to claim 1, characterized in that: Positioning holes are provided at the four corners of the top of the forming mold.

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