Automobile covering part mold machine tool difference compensation device and compensation method

Abstract

The invention discloses an automobile covering part mold machine tool difference compensation device which comprises a compensation plate which is oval and comprises a T1 model and a T2 model. A backing plate; the base plate is connected with an upper sliding block of a machine tool through a base plate mounting surface and connected with an upper die of a die through a die mounting groove, an elliptical groove for mounting the compensation plate and the base plate is formed in the middle of the base plate, and the bottom surface of the upper die is in contact with the compensation plate upper cambered surface of the compensation plate; the adjusting base plate is used for being selectively installed at the outward center position with the outermost side of the long axis of the compensation plate as the starting point and clamped between the base plate and the upper die; the invention further discloses an automobile covering part mold machine tool difference compensation method. The device is compact and exquisite in structure, compensation of the machine difference is completed in a very simple mode, the machine difference problem is solved under the condition that operation is very easy, the experiment condition is within a specified data interval, the debugging workload caused by the machine difference is reduced by more than 80%, the debugging workload caused by the machine difference is greatly reduced, and the debugging period is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive panel dies, and particularly to a compensation device and a compensation method for the difference between machine tools of automotive panel dies. Background Art

[0002] With the booming development of the Chinese automotive industry, the speed of product replacement and the new vehicle development cycle of automotive products are constantly shortening, which puts forward higher requirements for production efficiency, cost control and product quality in the automotive manufacturing process. As an important part of the automotive body, the manufacturing quality of automotive panels directly affects the appearance, performance and safety of the whole vehicle. At present, most automotive panels are manufactured by the die cold stamping process, which has the advantages of high efficiency, high precision and low cost.

[0003] However, in the process of die cold stamping forming, the difference between machine tools among different press equipment becomes the key factor restricting the forming consistency of dies. Especially between die manufacturers and automotive manufacturers, due to the differences in parameters such as machine tool performance, stiffness and deflection, when the die is transferred to the equipment of automotive manufacturers, it often needs to be re-adjusted, which not only increases the production cost, but also prolongs the production cycle. Press equipment belongs to heavy assets and its cost is high. Especially for the press equipment of large automotive panels, the equipment cost is often tens of millions, which results in large differences in equipment among different manufacturers and it is less likely to fully unify the equipment. Therefore, the problem of machine tool difference is an important influencing factor for product quality stability, and also an important reason for repeated debugging and extended new vehicle development cycle.

[0004] Regarding the problem of machine tool difference, the current mainstream solution can only achieve the requirement of die and machine tool matching by on-line debugging and a large investment in craftsman labor hours. This method has a long cycle, a large amount of craftsman labor, and a more obvious impact on the product quality result, but the cycle and cost waste are serious. The latest innovative technology - the mode of adding adjustment blocks on the back of the die, although it can alleviate the influence of machine differences, for large automotive panel dies, especially for dies with a length of more than 1.5 meters, the effect and stability control are not good. Therefore, if the problem of machine tool difference can be solved through a new technical mode, it will greatly shorten the overall application cycle of the die, reduce the cost, and reduce the heavy labor of craftsmen; and based on this technology, the debugging waste of the production line can be reduced, and the listing of new models can be accelerated. Therefore, solving this technical problem is an urgent market demand for promoting the rapid line application of dies.

[0005] It should be particularly noted that the above technical information is only intended to deepen the understanding of the overall background art of the present invention, and should not be regarded as an admission or any form of implication that the above technical information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0006] In view of the deficiencies in the above-mentioned background art, the present invention proposes a difference compensation device and compensation method for automobile panel dies and machine tools, and the technical problem to be solved is: how to solve the forming quality problem and repeated debugging problem caused by the difference between the machine tool and the die with a length of more than 1.5 meters.

[0007] The technical solution of the present invention is as follows: A difference compensation device for automobile panel dies and machine tools, comprising: A compensation plate, which is elliptical and includes two shapes, T1 and T2: The T1 type of shape is a central convex point arc-shaped pad that gradually transitions from the center point of the ellipse to the surrounding area, and the middle of the arc surface on the upper surface of the ellipse is higher than the four edges; The T2 type of shape is a double-vertex arc-shaped pad with the midpoint of the short axis of the ellipse as the center, and the same distance offset to the left and right as the high points, and evenly transitioning to zero around, and the two highest points of the arc surface on the upper surface of the ellipse are higher than the surrounding area.

[0008] A backing plate, which is an elliptical gasket with a standard thickness.

[0009] A base plate, which is connected to the upper slider of the machine tool through the base plate mounting surface and connected to the upper die of the die through the die mounting groove. An elliptical groove for installing the compensation plate and the backing plate is machined in the middle of the base plate. Complementary compensation plate mounting holes, backing plate mounting holes, and compensation plate fixing holes are respectively provided on the compensation plate, the backing plate, and the base plate, and the bottom surface of the upper die contacts the upper arc surface of the compensation plate.

[0010] And an adjusting backing plate, which is used for selectively installing at a position centered outward starting from the outermost side of the long axis of the compensation plate and clamped between the base plate and the upper die.

[0011] On the basis of the above technical solution, as a preferred technical solution of the difference compensation device for automobile panel dies and machine tools, the length of the long axis of the compensation plate is 60% of the length of the machine tool workbench, the length of the short axis is 70% of the width of the machine tool, and the height of the compensation plate is 100 mm; The middle of the arc surface on the upper surface of the ellipse in the T1 type of shape is 1 mm higher than the four edges; The two highest points of the arc surface on the upper surface of the ellipse in the T2 type of shape are 0.8 mm higher than the surrounding area; The thickness of the backing plate includes four types: 0.1 mm, 0.2 mm, 0.3 mm, and 0.5 mm, and the depth of the elliptical groove is 100 mm.

[0012] A difference compensation method for automobile panel dies and machine tools, using the difference compensation device for automobile panel dies and machine tools described in any one of the above technical solutions to perform the following steps: Step 1, Classification of machine tool difference impacts: When it is a single-slot die and the pressure cylinders of the pressure equipment are distributed at the four corners, use a compensation plate with T1 styling and do not use an adjustment shim; when it is a single-slot die and the pressure cylinders of the pressure equipment are evenly distributed, use a compensation plate with T1 styling and use an adjustment shim; when it is a double-slot die, use a compensation plate with T2 styling.

[0013] Step 2, Situation determination: If the products of the die manufacturer show a convex-middle machine tool difference on the production line of the production line manufacturer, the die manufacturer needs to use a machine tool difference compensation device for automotive panel dies on the pressure equipment for die debugging, and this situation is set as Situation 1; if the state of the pressure equipment of the production line manufacturer is special and the machine tool difference shows a concave-middle machine tool difference after arriving at the production line manufacturer, the production line manufacturer needs to use a machine tool difference compensation device for automotive panel dies to compensate for the machine difference, and this situation is set as Situation 2.

[0014] Step 3, Status judgment: For Situation 1, the status judgment is divided into: Status 1: single-slot die, the pressure cylinders of the pressure equipment are distributed at the four corners; Status 2, single-slot die, the pressure cylinders of the pressure equipment are evenly distributed; Status 3, double-slot die status; for Situation 2, no compensation is made by the die manufacturer, and only a machine tool difference compensation device for automotive panel dies needs to be configured for the production line manufacturer.

[0015] Step 4, Machine tool difference measurement and reference machine tool difference calculation.

[0016] Step 5, Shim thickness calculation and adjustment shim thickness calculation, and match the device adjustment data of the newly developed die according to the operation results of the previous steps to determine the accurate compensation amount for the production status debugging of the die manufacturer's die production line.

[0017] Step 6, Assembly and installation of the device.

[0018] Step 7, Die debugging, reducing or eliminating the impact of machine differences.

[0019] Based on the above technical solutions, as a preferred technical solution of the machine tool difference compensation method for automotive panel dies, for the machine tool difference measurement in Status 1, take any fully colored die without device compensation from the die manufacturer and conduct a pressure test on the pressure equipment of the production line manufacturer. Use the multi-point measurement method to find the maximum machine difference measurement deviation value. Let the die length be L, the test pressure be P, and the test maximum machine difference be h. Then the calculation formula for the standard machine difference H1 is: H1 = 1000h / P + 1000 / L * 45%; P >= 800T, L >= 1500mm.

[0020] Based on the above technical solutions, as a preferred technical solution of the method for compensating for the differences between machine tools for automotive panel dies, for the measurement of machine tool differences in State 2, take any fully colored die without device compensation from the die manufacturer and conduct a pressure test on the pressure equipment of the production line manufacturer. Use a six-column layout pattern for measurement. With the center line in the die manufacturer's direction as the center, offset 100 mm to the left and right respectively to layout two columns of points, and measure the average machine difference value, which is defined as h1; layout two columns of points respectively 100 mm and 200 mm inward from the outermost side of the left and right side surfaces, calculate the average machine difference value of the two left columns of points, which is defined as h2, and the average machine difference value of the two right columns of points is defined as h3; define the distance of the left inner point from the long direction of the die as L1, the distance of the right inner point from the long direction of the die as L2, define the length of the die as L, and the test pressure as P. Then the calculation formula for the standard machine difference H2 is: H2 = 1000h1 / P + 1000 / L * 20%; P >= 800T, L >= 1500mm.

[0021] The calculation formula for the compensation coefficient TL of the left adjustment shim is: TR = 1000h2 / P * L1 / 1000 * 80%.

[0022] The calculation formula for the compensation coefficient TR of the right adjustment shim is: TR = 1000h3 / P * L2 / 1000 * 80%.

[0023] Based on the above technical solutions, as a preferred technical solution of the method for compensating for the differences between machine tools for automotive panel dies, for the measurement of machine tool differences in State 3, take any fully colored die without device compensation from the die manufacturer and conduct a pressure test on the pressure equipment of the production line manufacturer; measure the maximum machine difference value by evenly distributing points on the double-slot die, which is defined as h4, define the length of the die as L, and the test pressure as P. Then the calculation formula for the standard machine difference H3 is: H3 = 1000h4 / P + 1000 / L * 30%, P >= 800T, L >= 1500mm.

[0024] Based on the above technical solutions, as a preferred technical solution of the method for compensating for the differences between machine tools for automotive panel dies, for the calculation of the shim thickness in State 1: Let the forming pressure of the newly developed die be P1 and the length of the die be L1. Then the shim thickness D1 is: D1 = P1 / 1000 * H1 - L1 / 1000 * 4%.

[0025] Based on the above technical solutions, as a preferred technical solution of the method for compensating for the differences between machine tools for automotive panel dies, for the calculation of the shim thickness and the adjustment of the shim thickness in State 2: Let the forming pressure of the newly developed die be P2.

[0026] Then the shim thickness D2 is: D2 = P2 / 1000 * H2.

[0027] The thickness DL of the left adjustment shim is: DL = P2 / 1000 * TL.

[0028] The thickness DR of the right adjustment shim is: DR = P2 / 1000 * TR.

[0029] On the basis of the above technical solution, as a preferred technical solution of the compensation method for the difference between the automotive panel die machine tools, assuming the length of the die is AL and the width is BW, the length A and width B of the left and right adjustment shims to be cut are respectively: A = AL / 10, B = BW / 10. If the calculated value of A or B is less than 100 mm, then take its value as 100 mm.

[0030] On the basis of the above technical solution, as a preferred technical solution of the compensation method for the difference between the automotive panel die machine tools, for the calculation of the thickness of the backing plate in state three: assuming the forming pressure of the newly developed die is P3 and the length of the die is L3, then the thickness D3 of the backing plate is: D3 = P3 / 1000 * H3 - L3 / 1000 * 4%.

[0031] On the basis of the above technical solution, as a preferred technical solution of the compensation method for the difference between the automotive panel die machine tools, in the case of state one, select a backing plate with thickness D1 and place it in the base plate, install a compensation plate of type T1 on the backing plate of the base plate, install the upper die of the die on the combined device, and install the device together with the upper die on the upper slider of the machine tool, thus completing the combined installation of the device.

[0032] On the basis of the above technical solution, as a preferred technical solution of the compensation method for the difference between the automotive panel die machine tools, in the case of state two, select a backing plate with thickness D2 and place it in the base plate, install a compensation plate of type T1 on the backing plate of the base plate, install the left and right adjustment shims on the base plate, install the upper die of the die on the combined device, and install the device together with the upper die on the upper slider of the machine tool, thus completing the combined installation of the device.

[0033] On the basis of the above technical solution, as a preferred technical solution of the compensation method for the difference between the automotive panel die machine tools, in the case of state three, select a backing plate with thickness D3 and place it in the base plate, install a compensation plate of type T2 on the backing plate of the base plate, install the upper die of the die on the combined device, and install the device together with the upper die on the upper slider of the machine tool, thus completing the combined installation of the device.

[0034] Compared with the prior art, the automotive panel die machine tool difference compensation device and compensation method provided by the present invention have the following beneficial effects: 1. The device has a compact and delicate structure. It adopts a minimalist approach to complete the compensation for machine differences, solves the machine difference problem under very easy - to - operate conditions. The experimental situation is within the specified data range, reducing the debugging workload caused by machine differences by more than 80%, significantly reducing the debugging workload caused by machine differences, and shortening the debugging cycle.

[0035] 2. By establishing a mathematical model of the influence of stiffness and deflection on the mold forming state; correspondingly establishing a hedging operation for mold point control adjustment, and conducting batch experiments to find a common algorithm pattern, providing a reference solution for solving complex equipment difference problems.

[0036] 3. The minimalist approach of this device and the induction and minimization of application algorithms provide a good model for engineering and technical personnel to serve front - line production, liberating the calculation and adjustment difficulties of front - line production personnel in the simplest way and enabling the rapid application of technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 It is an exploded view of the machine tool difference compensation device for automotive panel dies; Figure 2 is Figure 1 an enlarged view of the compensation plate in Figure 3 is Figure 1 an enlarged view of the base plate in Figure 4 is the force analysis diagram of state one; Figure 5 is the deformation analysis diagram of state one; Figure 6 is the application theory diagram of the machine tool difference compensation device for automotive panel dies; Explanation of the reference numerals in the drawings: 1 Compensation plate, 2 Cushion plate, 3 Base plate, 4 Adjusting cushion plate; 1.1 Upper arc surface of the compensation plate, 1.2 Installation surface of the compensation plate, 1.3 Installation hole of the compensation plate.

[0039] 3.1 Installation surface of the base plate, 3.2 Installation surface of the cushion plate, 3.3 Mold installation groove, 3.4 Fixed hole for the compensation plate. DETAILED DESCRIPTION OF THE INVENTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] These embodiments are provided in this application to make this application thorough and complete, and to fully convey the scope of this application to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the compositions of materials, numerical expressions and values described in these embodiments shall be construed as merely exemplary, rather than as limitations.

[0042] It should be noted that in the description of this application, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; the orientation or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "axial", "radial", etc. are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to this application. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0043] In addition, the "first", "second" and similar terms used in this application do not denote any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Terms such as "including" or "comprising" mean that the elements before this term cover the elements listed after this term, and do not exclude the possibility of also covering other elements.

[0044] It should also be noted that in the description of this application, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0045] All terms used in this application have the same meaning as understood by those of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0046] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification.

[0047] This invention patent relates to the field of automotive molds and is a device and method applied during the manufacturing process of automotive panel molds by manufacturers to reduce or eliminate the impact of equipment differences between the application manufacturers.

[0048] To solve the problems pointed out in the background art, the present invention precisely analyzes parameters such as the stiffness and deflection of different pressure devices, establishes a mathematical model of the influence of stiffness and deflection on the mold forming state; based on the mathematical model, conducts location and gradual data accumulation experiments on the dynamic micro-deformation of the strain region in the dynamic process of mold forming, establishes a counter-punch mathematical model for mold control adjustment, establishes a compensation scheme for machine differences generated by different sizes, force states, and pressure distribution requirements, and simplifies it through batch experiments; develops a machine difference compensation device for large automotive panel molds and its application method.

[0049] This innovation includes a device part and an application method part. The device part mainly compensates for the machine difference values between different pressure devices through an extremely simple pad plate type compensation device. The application method part is a corresponding parameter adjustment system for device adjustment calculated and deduced through batch simulation, data modeling, and accumulation experiments. This parameter adjustment system is used to adjust the corresponding device, achieving the adjustment of machine differences for different pressure devices in a simple manner, thereby greatly reducing the debugging workload and shortening the matching cycle of the mold production line, promoting the rapid debugging application of the automotive production line, and providing a machine difference adjustment technical solution for the rapid market launch of new cars; the experimental molds of this device and application method have a length between 2 and 4 meters, a pressure range between 800T and 1900T, and a machine difference range between 0.2 and 0.8 millimeters.

[0050] As Figures 1 to 6 shown, the specific implementation manner of the present invention is described as follows: 1. A machine difference compensation device for automotive panel molds and its application method. The device part consists of four parts: a compensation plate 1, a backing plate 2, a base plate 3, and an adjusting backing plate 4. Add the backing plate 2 under the compensation plate 1, and then through the mounting holes 1.3 of the compensation plate, use screws to install the compensation plate 1 and the backing plate 2 on the upper side of the base plate 3, thus completing the assembly work of the overall extremely simple device and achieving quick assembly simply.

[0051] Part description: The compensation plate 1 is divided into two shapes, T1 and T2. The shape of T1 is a center-convex point arc-shaped cushion block that gradually transitions from the center point of the ellipse to the surrounding area. The length of the major axis of the ellipse is 60% of the length of the machine tool workbench, and the length of the minor axis of the ellipse is 70% of the width of the machine tool. The middle of the arc surface on the upper surface of the ellipse is 1 mm higher than the four edges.

[0052] The shape of T2 is a double-vertex arc-shaped cushion plate with the midpoint of the minor axis of the ellipse as the center, offsetting 450 mm to the left and right as the high points, and evenly transitioning to zero around. The lengths of the major and minor axes of the ellipse in the first case are the same, that is, the length of the major axis of the ellipse is 60% of the length of the machine tool workbench, and the length of the minor axis of the ellipse is 70% of the width of the machine tool. The two highest points on the arc surface of the upper surface of the ellipse are 0.8 mm higher than the surrounding area. The height of both compensation plates 1 is 100 mm.

[0053] The cushion plate 2 is a standard-thickness gasket, and the thicknesses are divided into four types: 0.1 mm, 0.2 mm, 0.3 mm, and 0.5 mm.

[0054] The base plate 3 is a cast iron flat workbench with a thickness of 200 mm, and an elliptical groove with a depth of 100 mm lower than the plane is machined in the middle for installing the compensation plate 1 and the cushion plate 2.

[0055] The adjustment cushion plate 4 is a standard-thickness gasket plate, and the thicknesses are divided into four types: 0.1 mm, 0.2 mm, 0.3 mm, and 0.5 mm.

[0056] 2. By analyzing the causes and amounts of machine differences in large automotive panel dies (hereinafter referred to as dies), it is found that the main causes of machine differences are the different deflections and poor parallelism of the machine tool, resulting in different deformations of the machine tool workbench under high-tonnage pressure. Although this deformation shows various differences, it has common states, and its states are mainly as follows: 1. The machine difference increases when the pressure increases; 2. The size of the machine difference is related to the layout of the machine tool pressure cylinders and the concentrated position of the die forming area; 3. Effective compensation for the machine difference can be achieved through center gradient compensation.

[0057] Based on the common states, through batch experiments, a mathematical compensation algorithm can be established between the pressure and the machine difference, and thus the compensation amount can be determined. During the die debugging of die manufacturers, the state of the automotive manufacturer's production line is simulated through compensation, and thus the application state of the die on the automotive manufacturer's production line is simulated using the production equipment of die manufacturers to reduce or eliminate the influence of machine differences.

[0058] According to the commonality analysis and experiments, based on the differences in pressure equipment, it can be divided into two cases, namely, mainly the poor machine tool of die manufacturers and the poor machine tool of automotive production line manufacturers; and the influencing factors of machine differences are experimented in each case, and the solutions are classified correspondingly. The main influencing modes of machine differences can be divided into the following three states.

[0059] 1) Single-slot mold, pressure cylinder corner distribution state of the pressure equipment; in this state, the pressure cylinders at the four corners of the machine tool are distributed, and there are large changes in the middle of the machine tool table. Moreover, the weakest part of the table strength coincides with the concentrated part of the mold forming pressure, resulting in an increase in the machine error change. However, the advantage is that the machine error change distribution is relatively uniform at this time, approximately gradually changing from the center of the machine tool to the periphery. Through experimental testing, a mode of gradually changing from the center of the machine tool to the edge can be used to compensate for the deformation amount, thereby reducing or eliminating the influence of the machine error. Therefore, the compensation plate 1 can be used in a mode where the middle protrudes and gradually decreases towards the periphery to compensate for the deformation of the table, thereby eliminating the machine error (the compensation application and data algorithm are shown in the specific embodiments below).

[0060] 2) Single-slot mold, uniform distribution state of the pressure cylinders of the pressure equipment; in this state, the pressure distribution of the cylinders of the pressure equipment is relatively uniform, and the influence of the machine error is mainly caused by the parallelism, strength of the table, and the concentration of the mold pressing force. In this case, the machine error distribution has randomness, and the machine error needs to be reduced by means of central adjustment and compensation for the differences on both sides. The implementation method is to use the compensation plate 1 with a gradually changing distribution from the center of the machine tool to the edge for the main compensation of the machine error, and at the same time add an adjustment pad 4 to centrally compensate for the random deviation, thereby eliminating the machine error (the compensation application and data algorithm are shown in the specific embodiments below).

[0061] 3) Double-slot mold state; in this mold state, the force center of the mold changes from central concentration to the vicinity of the double-slot center area. Due to the offset of the force center, from the perspective of the statistical data of the machine error test and the adjustment experiment data in this state, the influence caused by the center offset reduces the influence caused by the different distributions of the pressure cylinders of the pressure equipment. Through the verification of the machine error compensation experiment, in this state, the machine error can be compensated by a mode of dispersing the compensation center to form a double-vertex gradual compensation. The implementation method is to replace the compensation plate 1 with a double-vertex compensation plate mode, and compensate for the magnitude of the machine error through the gradual force of the double vertices.

[0062] 3. Compensation method and steps.

[0063] 1) Situation determination: Situation determination mainly determines the situation of machine difference compensation. Generally, the pressure equipment of the production line manufacturer is relatively excellent. In order to achieve high-precision and rapid production, the production line manufacturer needs to continuously update the equipment. However, since the pressure equipment of the mold manufacturer is mainly used for debugging and does not require mass production, the equipment has a long service life and the demand for high-speed and high-precision production is insufficient. Therefore, the main situation is that the mold manufacturer needs to simulate the equipment state of the production line manufacturer through device compensation to achieve the effect of eliminating machine differences. The main manifestation of this common state is that the products of the mold manufacturer show a convex middle on the production line of the production line manufacturer. The mold manufacturer needs to compensate the pressure equipment through the device of the present invention on the pressure equipment. This situation is set as Situation One. However, if there is a special situation where the pressure equipment of the production line manufacturer is in a special state and the machine difference shows a concave middle machine difference after arriving at the production line manufacturer, the production line manufacturer needs to use this device to compensate the machine difference. This situation is set as Situation Two.

[0064] 2) State judgment: State judgment is to determine the state of the machine difference in order to select the device compensation combination and adjust the parameters. It mainly judges the compensation for Situation One in Step 1. If it is Situation Two, no compensation is made at the mold manufacturer. Configure this device for the production line manufacturer and run it in the reverse mode.

[0065] For Situation One, taking the pressure equipment and mold structure of the mold production manufacturer as the judgment basis, the pressure cylinders of the upper slider on the machine tool are arranged in two sections and evenly distributed in the middle, and the mold state is divided into two modes: single groove and double groove. Therefore, the state judgment can be divided into State One, single groove mold, and the pressure cylinder of the pressure equipment is distributed at the four corners; State Two, single groove mold, and the pressure cylinder of the pressure equipment is evenly distributed; State Three, double groove mold state according to the previous description.

[0066] 3) Machine difference measurement and reference machine difference calculation: Since the forming pressure, size, and state of the mold are different, the machine difference will also change accordingly. And because the machine difference compensation should be adjusted and matched with the production line before the mold is manufactured, it is impossible to use the mold to be produced to verify. Only other molds produced by the same factory can be used for testing to convert the compensation chain. Therefore, it is necessary to convert the machine difference into a reference machine difference, and then calculate and adjust the values of the device according to the specific parameters of the mold application to achieve compensation. According to the experimental results, the machine difference measurement and reference machine difference calculation methods are as follows: 3.1) Measurement of State One: Take any fully colored mold without device compensation from the mold manufacturer and conduct a pressure test on the pressure equipment of the production line manufacturer. Use the multi-point measurement method to find the maximum machine difference measurement deviation value. Let the length of the mold be L, the test pressure be P, and the maximum test machine difference be h. Then the calculation formula for the standard machine difference H1 is: H1 = 1000h / P + 1000 / L * 45%, (P >= 800T, L >= 1500mm, the value of H1 is reserved to 1 decimal place).

[0067] 3.2) Measurement of State 2: Take any fully colored mold without device compensation from the mold manufacturer and conduct a pressure test on the pressure equipment of the production line manufacturer. Measure using a 6-column layout pattern. With the center line in the direction of the mold factory as the center, offset 100 mm to the left and right respectively to layout two columns of points. The average machine difference measured is defined as h1; Layout two columns of points at 100 mm and 200 mm inward from the outermost side of the left and right side surfaces respectively. Calculate the average machine difference of the two columns of points on the left side and define it as h2, and the average machine difference of the two columns of points on the right side is defined as h3; Define the distance of the inner left side points from the long direction of the mold as L1, the distance of the inner right side points from the long direction of the mold as L2, define the length of the mold as L, and the test pressure as P. Then the calculation formula for the standard machine difference H2 is: H2 = 1000h1 / P + 1000 / L * 20%; (P >= 800T, L >= 1500mm, the value of H2 is reserved to 1 decimal place).

[0068] The calculation formula for the compensation coefficient TL of the left adjustment pad is: TL = 1000h2 / P * L1 / 1000 * 80%.

[0069] The calculation formula for the compensation coefficient TR of the right adjustment pad is: TR = 1000h3 / P * L2 / 1000 * 80%.

[0070] 3.3) Measurement of State 3: Take any fully colored mold without device compensation from the mold manufacturer and conduct a pressure test on the pressure equipment of the production line manufacturer; Uniformly layout points on the double-slot mold and measure the maximum machine difference value defined as h4. Define the length of the mold as L and the test pressure as P. Then the calculation formula for the standard machine difference H3 is: H3 = 1000h4 / P + 1000 / L * 30%, (P >= 800T, L >= 1500mm, the value of H3 is reserved to 1 decimal place).

[0071] 4) Calculation of the thickness of shim 2 and calculation of the thickness of shim 4: According to the operation results of the previous steps, match the device adjustment data of the newly developed mold to determine the accurate compensation amount for the production state debugging of the mold production line of the mold manufacturer.

[0072] 4.1) Calculation in State 1: In the case of State 1, let the forming pressure of the newly developed mold be P1 and the length of the mold be L1. Then the thickness D1 of shim 2 is: D1 = P1 / 1000 * H1 - L1 / 1000 * 4%, (the value of D1 is reserved to 1 decimal place).

[0073] 4.2) Calculation in State 2: In the case of State 2, let the forming pressure of the newly developed mold be P2. Then the thickness D2 of shim 2 is: D2 = P2 / 1000 * H2, (The value of D2 is reserved to one decimal place, and no die length correction is required for D2).

[0074] The thickness DL of the left adjusting pad 4 is: DL = P2 / 1000 * TL.

[0075] The thickness DR of the right adjusting pad 4 is: DR = P2 / 1000 * TR.

[0076] Assume the die length is AL and the width is BW. Then the length A and width B of the left and right adjusting gaskets to be cut are respectively: A = AL / 10, B = BW / 10. (If the calculated value of A or B is less than 100 mm, take its value as 100 mm).

[0077] The placement position of the adjusting pad 4 is centered and placed outward starting from the outermost side of the long axis of the compensation plate 1.

[0078] 4.3) Calculation in State Three: In the case of State Three, assume the forming pressure of the newly developed die is P3 and the die length is L3. Then the thickness D3 of the pad 2 is: D3 = P3 / 1000 * H3 - L3 / 1000 * 4%, (The value of D1 is reserved to one decimal place).

[0079] 5) Installation of device combination: Install the devices according to the calculated values to ensure that the devices are used to simulate the production line state for debugging.

[0080] 5.1) In the case of State One, select the pad 2 with thickness D1 and place it in the substrate 3. Install the compensation plate 1 of type T1 on the pad 2 of the substrate 3. Install the upper die of the die on the combined device, and install the device together with the upper die on the slider of the machine tool, thus completing the installation of the device combination.

[0081] 5.2) In the case of State Two, select the pad 2 with thickness D2 and place it in the substrate 3. Install the compensation plate 1 of type T1 on the pad 2 of the substrate 3. Install the left and right adjusting pads 4 on the substrate 3. Install the upper die of the die on the combined device, and install the device together with the upper die on the slider of the machine tool, thus completing the installation of the device combination.

[0082] 5.3) In the case of State Three, select the pad 2 with thickness D3 and place it in the substrate 3. Install the compensation plate 1 of type T2 on the pad 2 of the substrate 3. Install the upper die of the die on the combined device, and install the device together with the upper die on the slider of the machine tool, thus completing the installation of the device combination.

[0083] 6) Die debugging: Debug the die in the normal way to complete simulating the state of the pressure equipment of the production line manufacturer on the pressure equipment of the die manufacturer through this R & D device, reducing or eliminating the influence of machine differences.

[0084] Furthermore, the specific implementation is as follows: 1. According to the compensation method and steps of the device, conduct situation judgment, state judgment, machine difference measurement and reference machine difference calculation, calculate the thickness of the spacer 2 and adjust the thickness calculation of the spacer 4.

[0085] 2. According to the judgment and calculation results: 2.1 If it is State 1, place the spacer 2 with a thickness of D1 on the spacer mounting surface 3.2 of the substrate 3 (it can be one sheet or multiple sheets combined to reach the thickness of D1). Place the compensation plate 1 of type T1 on the spacer 2 of the substrate 3, make the compensation plate mounting surface 1.2 contact the upper surface of the spacer 2, and fix the compensation plate 1 to the compensation plate fixing hole 3.4 through the compensation plate mounting hole 1.3 to complete the combination of the device.

[0086] 2.2 If it is State 2, place the spacer 2 with a thickness of D2 on the spacer mounting surface 3.2 of the substrate 3 (it can be one sheet or multiple sheets combined to reach the thickness of D2). Place the compensation plate 1 of type T1 on the spacer 2 of the substrate 3, make the compensation plate mounting surface 1.2 contact the upper surface of the spacer 2, and fix the compensation plate 1 to the compensation plate fixing hole 3.4 through the compensation plate mounting hole 1.3; Place the left and right side adjusting spacers 4 directly on the substrate 3, and adjust the placement position of the adjusting spacer 4 to be centered outward starting from the outermost side of the long axis of the compensation plate 1 to complete the combination of the device.

[0087] 2.3 If it is State 3, place the spacer 2 with a thickness of D3 on the spacer mounting surface 3.2 of the substrate 3 (it can be one sheet or multiple sheets combined to reach the thickness of D3). Place the compensation plate 1 of type T2 on the spacer 2 of the substrate 3, make the compensation plate mounting surface 1.2 contact the upper surface of the spacer 2, and fix the compensation plate 1 to the compensation plate fixing hole 3.4 through the compensation plate mounting hole 1.3 to complete the combination of the device.

[0088] 3. Installation of the device and the die; Place the upper die of the die on the substrate 3. At this time, the highest point of the compensation plate 1 is higher than the substrate 3, and the bottom surface of the upper die of the die contacts the upper arc surface 1.1 of the compensation plate 1. Use a pressing plate (a common standard part of the pressure equipment) to install the upper die in the die mounting groove 3.3 of the 3 spacers; Install the upper die of the die together with the device on the slide block of the machine tool through the substrate mounting surface 3.1, and install the lower die of the die on the workbench of the machine tool to complete the installation of the die and the device on the machine tool.

[0089] 4. Debug the die normally until the debugging is completed 5. Remove the device, then the die state is the die state that is highly close to the pressure equipment state of the production line manufacturer, and the machine difference is eliminated or extremely small.

[0090] 6. Ship the die to the production line manufacturer for online matching, and the ideal effect of greatly eliminating the machine difference can be achieved.

[0091] The above content shows and describes the basic principles, main features and beneficial effects of the present invention. The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automobile panel die machine tool difference compensation device, characterized in that Including: A compensation plate (1), which is elliptical and includes two shapes, T1 and T2: The T1 shape is a central convex point arc-shaped cushion block that gradually transitions from the center point of the ellipse to the surroundings. The middle of the arc surface on the upper surface of the ellipse is higher than the four edges. The T2 shape is a double-vertex arc-shaped cushion block with the midpoint of the short axis of the ellipse as the center, and the high points are offset by the same distance to the left and right respectively, and evenly transition to zero around. The two highest points of the arc surface on the upper surface of the ellipse are higher than the surroundings; A backing plate (2), which is an elliptical gasket with a standard thickness; A base plate (3), which is connected to the slider on the machine tool through the mounting surface (3.1) of the base plate (3), and is connected to the upper die of the mold through the mold mounting groove (3.3). An elliptical groove for mounting the compensation plate (1) and the backing plate (2) is machined in the middle of the base plate (3). The compensation plate (1), the backing plate (2), and the base plate (3) are respectively provided with a compensation plate (1) mounting hole (1.3), a backing plate (2) mounting hole (2.1), and a compensation plate (1) fixing hole (3.4) that are mutually adapted. The bottom surface of the upper die contacts the compensation plate upper arc surface (1.1) of the compensation plate (1); And an adjusting backing plate (4), which is used to be selectively installed at a position centered outward starting from the outermost side of the long axis of the compensation plate (1), and is clamped between the base plate (3) and the upper die.

2. The difference compensation device for the automotive panel die machine tool according to claim 1, characterized in that: The length of the long axis of the compensation plate (1) is 60% of the length of the machine tool workbench, the length of the short axis is 70% of the width of the machine tool, and the height of the compensation plate (1) is 100 mm; The middle of the arc surface on the upper surface of the ellipse in the T1 shape is 1 mm higher than the four edges; The two highest points of the arc surface on the upper surface of the ellipse in the T2 shape are 0.8 mm higher than the surroundings; The thickness of the backing plate (2) includes four types: 0.1 mm, 0.2 mm, 0.3 mm, and 0.5 mm, and the depth of the elliptical groove is 100 mm.

3. A method for compensating the differences of an automobile panel die machine tool, characterized in that: Using the automotive panel die machine tool difference compensation device described in claim 1 or 2 to perform the following steps: Step 1, classification of machine tool difference effects: If it is a single-slot die and the pressure cylinders of the pressure equipment are distributed at the four corners, use the compensation plate (1) with the T1 shape and do not use the adjusting backing plate (4); If it is a single-slot die and the pressure cylinders of the pressure equipment are evenly distributed, use the compensation plate (1) with the T1 shape and use the adjusting backing plate (4); If it is a double-slot die, use the compensation plate (1) with the T2 shape; Step 2, situation determination: If the products of the die manufacturer show a middle convex type of machine tool difference on the production line of the production line manufacturer, the die manufacturer needs to use the automotive panel die machine tool difference compensation device on the pressure equipment for die debugging. This situation is set as situation one; If the state of the pressure equipment of the production line manufacturer is special and the machine tool difference shows a middle concave type of machine tool difference after arriving at the production line manufacturer, the production line manufacturer needs to use the automotive panel die machine tool difference compensation device to compensate for the machine difference. This situation is set as situation two; Step 3, Status Judgment: For Case 1, the status judgment is divided into: Status 1: Single-slot mold, the four-corner distribution status of the pressure cylinder of the pressure equipment; Status 2, single-slot mold, the uniform distribution status of the pressure cylinder of the pressure equipment; Status 3, double-slot mold status; For Case 2, no compensation is made by the mold manufacturer, and a compensation device for the difference in automotive panel molds and machine tools is configured for the production line manufacturer. Step 4, Machine Tool Difference Measurement and Reference Machine Tool Difference Calculation; Step 5, Thickness Calculation of the Spacer Plate (2) and Adjustment of the Thickness of the Spacer Plate (4). Calculate the device adjustment data for the newly developed mold according to the operation results of the previous steps to determine the accurate compensation amount for the production status debugging of the mold production line of the mold manufacturer. Step 6, Assembly and Installation of the Device; Step 7, Mold Debugging to Reduce or Eliminate the Influence of Machine Differences.

4. The method for compensating the difference of the automotive panel die machine tool according to claim 3, wherein: For the machine tool difference measurement of Status 1, take any fully colored mold without device compensation from the mold manufacturer and conduct a pressure test on the pressure equipment of the production line manufacturer. Use the multi-point measurement method to find the maximum machine difference measurement deviation value. Let the mold length be L, the test pressure be P, and the test maximum machine difference be h. Then the calculation formula for the standard machine difference H1 is: H1 = 1000h / P + 1000 / L * 45%; P >= 800T, L >= 1500mm.

5. The method for compensating for differences in automotive panel dies and machine tools according to claim 3, characterized in that: For the machine tool difference measurement of Status 2, take any fully colored mold without device compensation from the mold manufacturer and conduct a pressure test on the pressure equipment of the production line manufacturer. Use the six-column layout mode for measurement. With the center line in the direction of the mold factory as the center, offset 100mm to the left and right respectively to layout two columns of points, and measure the average value of the machine differences, which is defined as h1; Layout two columns of points 100mm and 200mm inward from the outermost side of the left and right side surfaces respectively, calculate the average value of the machine differences of the two columns of points on the left, which is defined as h2, and the average value of the machine differences of the two columns of points on the right, which is defined as h3; Define the distance between the inner points on the left and the long direction of the mold as L1, the distance between the inner points on the right and the long direction of the mold as L2, the mold length as L, and the test pressure as P. Then the calculation formula for the standard machine difference H2 is: H2 = 1000h1 / P + 1000 / L * 20%; P >= 800T, L >= 1500mm; The calculation formula for the compensation coefficient TL of the left adjustment spacer plate is: TR = 1000h2 / P * L1 / 1000 * 80%; The calculation formula for the compensation coefficient TR of the right adjustment spacer plate is: TR = 1000h3 / P * L2 / 1000 * 80%.

6. The method for compensating the difference of the automobile panel die machine tool according to claim 3, wherein: For the machine tool difference measurement of Status 3, take any fully colored mold without device compensation from the mold manufacturer and conduct a pressure test on the pressure equipment of the production line manufacturer; Uniformly distribute points on the double-slot mold to measure the maximum machine difference value, which is defined as h4. Define the mold length as L and the test pressure as P. Then the calculation formula for the standard machine difference H3 is: H3 = 1000h4 / P + 1000 / L * 30%, P >= 800T, L >= 1500mm.

7. The method for compensating the difference of the automobile panel die machine tool according to claim 4, wherein: For the thickness calculation of the spacer plate (2) in Status 1: Let the forming pressure of the newly developed mold be P1 and the mold length be L1. Then the thickness D1 of the spacer plate (2) is: D1 = P1 / 1000 * H1 - L1 / 1000 * 4%.

8. The method for compensating the difference of the automobile panel die machine tool according to claim 5, characterized in that: Thickness calculation of the backing plate (2) for State 2 and thickness calculation of the adjusting shim (4): Assume the forming pressure of the newly developed mold is P2, then the thickness D2 of the backing plate (2) is: D2 = P2 / 1000 * H2; The thickness DL of the left adjusting shim is: DL = P2 / 1000 * TL; The thickness DR of the right adjusting shim is: DR = P2 / 1000 * TR; Assume the length of the mold is AL and the width is BW, then the length A and width B of the left and right adjusting shims to be cut are: A = AL / 10, B = BW / 10. If the calculated value of A or B is less than 100 mm, then take its value as 100 mm.

9. The method for compensating the difference of the automobile panel die machine tool according to claim 6, wherein: Thickness calculation of the backing plate (2) for State 3: Assume the forming pressure of the newly developed mold is P3 and the length of the mold is L3, then the thickness D3 of the backing plate (2) is: D3 = P3 / 1000 * H3 - L3 / 1000 * 4%; 10. The method for compensating the difference of the automobile panel die machine tool according to any one of claims 7-9, characterized in that: In the case of State 1, select the backing plate (2) with thickness D1 and place it into the base plate (3). Install the compensation plate (1) of type T1 on the backing plate (2) of the base plate (3). Install the upper mold of the mold on the assembled device, and install the device together with the upper mold on the slider of the machine tool, thus completing the assembly and installation of the device; In the case of State 2, select the backing plate (2) with thickness D2 and place it into the base plate (3). Install the compensation plate (1) of type T1 on the backing plate (2) of the base plate (3). Install the left and right adjusting shims (4) on the base plate (3). Install the upper mold of the mold on the assembled device, and install the device together with the upper mold on the slider of the machine tool, thus completing the assembly and installation of the device; In the case of State 3, select the backing plate (2) with thickness D3 and place it into the base plate (3). Install the compensation plate (1) of type T2 on the backing plate (2) of the base plate (3). Install the upper mold of the mold on the assembled device, and install the device together with the upper mold on the slider of the machine tool, thus completing the assembly and installation of the device.

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