Manufacturing method of novel simple type matrix of evanescent mode

Abstract

The invention relates to the technical field of evanescent modes, and provides a manufacturing method of a novel simple type matrix of an evanescent mode, and the simple type matrix is manufactured by adopting polyurethane resin instead of wood to replace a metal material. The method comprises the following steps: clamping and correcting three-dimensional coordinates; milling a reference surface; milling the plane of the polyurethane resin substituted wood to be flat; then the machining program is rehearsed, the correctness of the formal machining process program is guaranteed, process abnormity is avoided, and the effects of checking and preventing are achieved; then rough machining is conducted through an end mill with the diameter phi of 5 mm, and the basic outline of the character die and the character fonts of the simple characters are machined firstly; carrying out semi-finish machining by adopting an end mill with the diameter phi of 2mm, and carrying out deepening and small-angle forming machining on the character die subjected to rough machining; then finish machining is conducted through an end mill with the diameter phi being 1 mm; and finally, a simple matrix is printed, and the matrix meeting the mold requirement can be obtained.

Description

Technical Field

[0001] The invention relates to the technical field of lost foam, in particular to a method for manufacturing a new type of lost foam simple character mold. Background Art

[0002] The lost foam of the automobile body cover is made of solid casting, and each set of molds has a lot of information, such as: material, project number, part number, stamping process combination number, single process number, upper and lower mold identification; mold weight, Chinese name, automobile manufacturer information and other Chinese and English information are marked on the external structure of the mold blank; it is mainly used for production planning, process service, inspection, sales and service to check whether the information of the mold is consistent with the order; because there are various brands of automobile manufacturers in the same foundry, their products are also different in structure and design, and this information is just to distinguish, avoid confusion, and ensure that the products correspond one by one. The various identifications and information of these molds are equivalent to the ID card of the mold, which must be attached to the mold body, and the production process does not allow errors, so the external information of the mold blank is large and necessary; and such a large amount of character information The manufacturer must invest a certain cost, which also increases the cost of the complete set of molds. In order to meet the requirements of the mold itself and save a certain amount of cost, how can we meet such requirements? How to achieve it has raised a new topic for our team to explore. At present, the production of external information of lost foam molds mainly relies on metal fonts. The current market is generally aluminum or aluminum alloy materials, which are processed and manufactured by CNC engraving machines, and the price is relatively expensive; because the information of the molds designed according to different car dealers, such as project number, part number, stamping process combination number, single process number, upper and lower mold identification; mold weight, Chinese name, Chinese information of automobile manufacturers and other Chinese and English information are not the same, so this requires our lost foam production factory to produce various fonts according to customer order requirements to meet the needs of the client; that is, it is equivalent to opening several sets of fonts for the mold information on each car dealer, and the appearance size is also different; basically unique. This is the reason why the production of metal fonts is expensive. But from this point of view, the production cost of lost foam must be invested in advance, which requires cost. Therefore, it is urgent to open a low-cost font manufacturing method that can meet the needs of lost foam. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a method for manufacturing a new type of simple lost foam mold to solve the technical problems of high cost and complex production in the prior art.

[0004] Based on the above purpose, the present invention provides a method for manufacturing a new type of simple lost foam mold, characterized in that polyurethane resin is selected as a raw material instead of wood for production, and the method includes the following steps: Step 1: Install the polyurethane resin substitute on the machine table of the CNC engraving machine, clamp it firmly and firmly, and adjust the center coordinates; Step 2: Use a Φ5mm diameter end mill to perform online processing, first processing the basic outline of the font and the font of simple characters; Step 3: first replace the Φ5mm diameter end mill from the spindle, and replace it with a Φ2mm diameter end mill to deepen and perform small-angle forming processing on the rough-processed mold to improve the initial accuracy of the mold; Step 4: First, replace the Φ2mm diameter end mill from the spindle, and replace it with a Φ1mm diameter end mill to finely carve the semi-finished and initially formed font, as well as the natural transition between the fonts, including the R angle, and finally obtain a complete font.

[0005] Preferably, the method further comprises a step 5 of using the processed polyurethane resin substitute wooden font as a master plate to print a simple font.

[0006] Preferably, the printing of the simple character mold includes: placing the polyurethane resin substitute wood character mold as a master plate on the workbench of the blister packaging machine, manually operating the blister paper to cover the characters, pressing the cover of the packaging machine as a whole and heating it with electricity, pressing the blister paper against the character mold through thermoforming to generate the required blister characters, and manually pasting them to the fixed position of the mold after cooling.

[0007] Preferably, a milling reference surface is further included between step one and step two: a surface milling cutter with a diameter of Φ100 mm is used to mill the plane of the polyurethane resin substitute wood flat as a surface reference for subsequent processing.

[0008] Preferably, after milling the reference surface, a machining program preview is also included: replace the Φ100mm face milling cutter on the spindle with a roughing tool - a Φ5mm diameter face milling cutter, install the tool and import the mold machining program, and first preview the machining path in the program software.

[0009] Preferably, the rotation speed of the face milling cutter during the milling of the reference surface is 3000 rpm.

[0010] Preferably, in step 2, the rotation speed of the end mill is 5000 rpm and the feed rate is 500 mm / min.

[0011] Preferably, in step three, the rotation speed of the end mill is 5000-6000 rpm, and the feed rate is 300 mm / min.

[0012] Preferably, in step 4, the rotation speed of the end mill is 2000-2500 rpm, and the feed rate is 150 mm / min.

[0013] The beneficial effects of the present invention are as follows: the present invention adopts polyurethane resin to replace metal materials in making a simple font; firstly, clamping and calibrating three-dimensional coordinates are performed; then, a milling reference surface is performed - the plane of the polyurethane resin to replace the wood is milled flat; then, the processing program is previewed to ensure the correctness of the formal processing program, avoid process abnormalities, and play a role in inspection and prevention; then, a Φ5mm diameter end mill is used for rough processing, the end mill speed is 5000rpm, and the feed rate is 500mm / min, so as to avoid sticking of the tool, and the basic outline of the font and the font of simple characters are processed first; then, a Φ2mm diameter end mill is used for semi-finishing processing, and the font after the rough processing is completed is deepened and small-angle forming processing is performed; then, a Φ1mm diameter end mill is used for fine processing, the end mill speed is 2000-2500rpm, and the feed rate is 150mm / min, so as to avoid brittle fracture of the polyurethane resin to replace the wood and avoid sticking of the tool; finally, a simple font is printed to obtain a font that meets the mold requirements. The whole manufacturing method is low-cost, and the existing cutting tools can be used to manufacture simple character molds, which greatly reduces the production cost. In addition, the polyurethane resin substitute wood is soft and has little wear on the cutting tools. DETAILED DESCRIPTION

[0014] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0015] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0016] This embodiment provides a method for manufacturing a new type of simple lost foam mold, which is characterized in that polyurethane resin is selected as a raw material instead of wood for manufacturing, and includes the following steps: S1, clamping and calibrating 3D coordinates Using the existing processing equipment - Styrofoam CNC engraving machine, first install the polyurethane resin substitute wood with a length x width x height = 550X365X70mm on the Styrofoam machine tool workbench, clamp it firmly and firmly, and adjust the center coordinates in the three directions of x / y / z; S2, milling reference surface First, use a face milling cutter with a diameter of Φ100mm and a rotation speed of 3000rpm to mill the plane of the polyurethane resin substitute wood flat as the surface reference for subsequent processing; S3, machining program preview After the above process is completed, replace the Φ100mm face milling cutter on the spindle with a roughing tool - a Φ5mm diameter end milling cutter. Install the tool and import the mold processing program to wait for processing. To ensure the correctness of the formal processing program, the processing path must be previewed in the program software to avoid process abnormalities and play a role in inspection and prevention. S4, roughing After the program preview is completed and confirmed, it is connected and transmitted with the styrofoam machine control system through the programming software; the polyurethane resin substitute wood is processed online using a Φ5mm diameter end mill, because the polyurethane resin substitute wood is a soft material, different from the hardness or brittleness of metal materials. In order to avoid sticking, the tool specifications, processing parameters and specific procedures used in the process are constantly adjusted during the experiment. Through exploration, the speed of the Φ5mm end mill for rough processing is S5000rpm and the feed rate is 500mm / min; under this parameter, the basic outline of the font and the font of simple characters are first processed; S5, semi-finishing First, replace the Φ5mm diameter end mill from the spindle, and replace it with a Φ2mm diameter end mill to deepen and form the font after rough machining to improve the initial accuracy of the font; continue to avoid tool sticking, and use the Φ2mm end mill at a speed of 5000-6000rpm and a feed rate of 300mm / min for milling; S6, finishing First, replace the Φ2mm diameter end mill from the spindle, and replace it with a Φ1mm diameter end mill to finely carve the semi-finished initial mold, as well as the natural transition between the fonts of the mold, including the R angle, and finally get a complete mold that meets the requirements. This process is different from the above processing parameters, because the diameter of the fine carving tool is very small, and its toughness is not as good as that of a large tool. If the speed is too fast, it is likely to break brittlely, and if it is too slow, it is easy to be stuck by the material. Therefore, after testing, the Φ1mm end mill finally adopted a speed of 2000-2500rpm and a feed rate of 150mm / min for processing, and intermittent observation was carried out during the process to avoid accidents and ensure success at one time; S7, simple font printing The processed polyurethane resin substitute wooden font is used as the master version and placed on the workbench of the blister packaging machine. After the blister paper is manually moved down to cover the characters, the cover of the packaging machine is pressed down as a whole and powered on for heating. The blister paper is pressed against the font through thermoforming to generate the required blister characters. After cooling, it is manually pasted to the fixed position of the mold.

[0017] By using polyurethane resin to replace metal materials in making simple fonts; first clamping and calibrating three-dimensional coordinates; then milling the reference surface - milling the polyurethane resin substitute plane flat; then previewing the processing program to ensure the correctness of the formal processing program, avoid process abnormalities, and play a role in inspection and prevention; then using a Φ5mm diameter end mill for rough processing, the end mill speed is 5000rpm, and the feed rate is 500mm / min, so as to avoid sticking, first process the basic outline of the font and the font of simple characters; then use a Φ2mm diameter end mill for semi-finishing, deepen the font after rough processing and perform small-angle forming processing; then use a Φ1mm diameter end mill for fine processing, the end mill speed is 2000-2500rpm, and the feed rate is 150mm / min, so as to avoid brittle fracture of the polyurethane resin substitute and sticking; finally, print the simple font to obtain a font that meets the mold requirements. The whole manufacturing method is low-cost, and the existing cutting tools can be used to manufacture simple character molds, which greatly reduces the production cost. In addition, the polyurethane resin substitute wood is soft and has little wear on the cutting tools.

[0018] The purchase cost of polyurethane resin substitute wood is relatively low, and the market price is based on square meters. The specification of each piece of this material is 0.6X0.5X0.1=0.03 cubic meters; the unit price is about 360 yuan, which is cheaper than the raw materials for metal type molds; the material is soft and easy to process; it causes little wear on the tool; it can be completed and meet the requirements by using existing foam engraving machines and tools; it avoids the uncertainty of delivery time due to outsourcing, breaks the industry's tradition of outsourcing, achieves self-sufficiency, and realizes the stage of self-control of output and quality on the production and demand sides; this invention requires low investment and high returns; through experiments, it is found that one piece of polyurethane resin substitute wood can produce about 200 simple type molds, which greatly reduces the cost of outsourcing and meets market demand.

[0019] According to the market base price of aluminum molds, a single mold costs about 90 yuan. If a set of molds requires 200 molds, the purchase cost of a set of molds is: 90X200=18,000 yuan / set; now polyurethane resin is used instead of wood to make homemade molds. The base price of a single piece of material with a length x width x height = 550X365X70mm is about 360 yuan / piece; its processing output is 200 molds, and the homemade mold costs 20 yuan / hour (including labor and equipment depreciation). A set of molds needs 32 hours to complete the processing, so the cost of a set of molds is: 360+(20X32)=1,000 yuan / set.

[0020] According to the above two calculations, the type mold produced by using polyurethane resin instead of wood can save 18,000-1,000=17,000 yuan / set compared with aluminum type molds; based on the annual production capacity of about 160 sets of molds, it can save 17,000X12=204,000 yuan / year.

[0021] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A method for manufacturing a new type of lost foam simple character mold, characterized in that: The production process of using polyurethane resin instead of wood as raw material includes the following steps: Step 1: Install the polyurethane resin substitute on the machine table of the CNC engraving machine, clamp it firmly and firmly, and adjust the center coordinates; Step 2: Use a Φ5mm diameter end mill to perform online processing, first processing the basic outline of the font and the font of simple characters; Step 3: first replace the Φ5mm diameter end mill from the spindle, and replace it with a Φ2mm diameter end mill to deepen and perform small-angle forming processing on the rough-processed mold to improve the initial accuracy of the mold; Step 4: First, replace the Φ2mm diameter end mill from the spindle, and replace it with a Φ1mm diameter end mill to finely carve the semi-finished and initially formed font, as well as the natural transition between the fonts, including the R angle, and finally obtain a complete font.

2. The method for manufacturing a new type of simple character mold of lost foam according to claim 1, characterized in that: The method also includes a step 5 of using the processed polyurethane resin to replace the wooden font as a master plate to print a simple font.

3. According to the method for manufacturing a new type of simple lost foam mold according to claim 1, it is characterized in that The printing of the simple character mold comprises: placing a polyurethane resin substitute wood character mold as a master plate on the workbench of a blister packaging machine, manually operating the blister paper to cover the characters, pressing the cover of the packaging machine as a whole and heating it with electricity, pressing the blister paper against the character mold through thermoforming to generate the required blister characters, and manually pasting them to a fixed position of the mold after cooling.

4. The method for manufacturing a new type of simple character mold of lost foam according to claim 1, characterized in that: The step between step 1 and step 2 also includes milling the reference surface: using a face milling cutter with a diameter of Φ100mm to mill the plane of the polyurethane resin substitute wood flat as the surface reference for subsequent processing.

5. The method for manufacturing a new type of simple character mold of lost foam according to claim 4, characterized in that: After milling the reference surface, the processing program preview is also included: replace the Φ100mm face milling cutter on the spindle with a roughing tool - a Φ5mm diameter end milling cutter, install the tool and import the font processing program, and first preview the processing path in the program software.

6. The method for manufacturing a new type of simple character mold of lost foam according to claim 5, characterized in that: The rotation speed of the face milling cutter during the milling of the reference surface is 3000 rpm.

7. The method for manufacturing a new type of simple character mold of lost foam according to claim 1, characterized in that: In step 2, the rotation speed of the end mill is 5000 rpm and the feed rate is 500 mm / min.

8. The method for manufacturing a new type of simple character mold of lost foam according to claim 1, characterized in that: In step three, the rotation speed of the end mill is 5000-6000 rpm, and the feed rate is 300 mm / min.

9. The method for manufacturing a new type of simple character mold of lost foam according to claim 1, characterized in that: In step 4, the rotation speed of the end mill is 2000-2500 rpm, and the feed rate is 150 mm / min.