Punching device

Abstract

The invention relates to a punching device (100) for punching a semi-finished product (101), comprising a first pressing tool (103), a second pressing tool (105), an accommodation region (107) arranged between the first pressing tool and the second pressing tool for accommodating the semi-finished product, a punching drive (109) designed to move the first pressing tool relative to the second pressing tool in order to punch the semi-finished product accommodated in the accommodation region, wherein the first pressing tool has at least one temperature sensor (131), at least one piezoelectric sensor (133), at least one position sensor (135), and has a controller (137) designed to detect a wear condition of the first pressing tool and / or the second pressing tool depending on a detected temperature of the first pressing tool, depending on a detected vibration of the first pressing tool and depending on a plurality of detected positions of the first pressing tool.

Description

Technical Field

[0001] The present invention relates to a stamping apparatus for stamping semi-finished products, and a method for determining the wear condition of a first pressing tool and / or a second pressing tool of the stamping apparatus for stamping semi-finished products. Background Technology

[0002] In conventional stamping equipment used to stamp semi-finished strips, such as metal sheets, parts are stamped out continuously. This can lead to malfunctions of the stamping equipment due to wear during production, or a decline in the quality of the produced parts. According to known prior art, continuous, especially sensor-based, monitoring of the wear condition of conventional stamping equipment is not feasible. Summary of the Invention

[0003] The purpose of this invention is to provide a stamping device for stamping semi-finished products, whose wear condition can be effectively monitored.

[0004] The present invention is based on the knowledge that the first pressing tool of the stamping device includes a temperature sensor for detecting the temperature of the first pressing tool and a piezoelectric sensor for detecting the vibration of the first pressing tool, and the stamping device includes a position sensor designed to detect multiple positions of the first pressing tool.

[0005] In this case, the controller is designed to determine the wear condition of the first pressing tool and / or the second pressing tool of the stamping device based on the detected temperature of the first pressing tool, the detected vibration of the first pressing tool, and multiple detected positions of the first pressing tool.

[0006] According to a first aspect of the invention, the objective is achieved by a stamping apparatus for stamping a semi-finished product, the apparatus comprising a first pressing tool, a second pressing tool, a receiving area disposed between the first and second pressing tools for receiving the semi-finished product, a stamping drive mechanism designed to move the first pressing tool relative to the second pressing tool to stamp the semi-finished product received in the receiving area, wherein the first pressing tool has at least one temperature sensor designed to detect the temperature of the first pressing tool, wherein the first pressing tool includes at least one piezoelectric sensor designed to detect vibration of the first pressing tool, wherein the stamping apparatus includes at least one position sensor designed to detect multiple positions of the first pressing tool relative to the second pressing tool, and a controller designed to determine the wear condition of the first pressing tool and / or the second pressing tool based on the detected temperature of the first pressing tool, the detected vibration of the first pressing tool, and the detected multiple positions of the first pressing tool.

[0007] This provides a technical advantage: the wear condition of the stamping device, particularly the first and / or second pressing tools, can be effectively determined by the detected parameters using the controller. If the detected wear condition exceeds a critical value, the stamping device can be repaired or maintained in a timely manner, for example, before it completely fails or before it stamps out defective parts.

[0008] Using a piezoelectric sensor, the vibration of the first pressing tool can be effectively detected, whereby the detected vibration of the first pressing tool undergoes wear-related changes during the ongoing production process. Since the first pressing tool and the second pressing tool are coupled within the stamping device, the wear condition of the second pressing tool can be inferred, either alternatively or additionally, from the detected wear-related changes in the vibration of the first pressing tool.

[0009] Therefore, the controller can effectively determine the wear condition of the first and / or second pressing tools based on the detected parameters of the first pressing tool. The controller can determine the wear condition of the first pressing tool based on the detected parameters of the first pressing tool. The controller can determine the wear condition of the second pressing tool based on the detected parameters of the first pressing tool. The controller can determine the wear condition of both the first and second pressing tools based on the detected parameters of the first pressing tool.

[0010] During the production process, heat is generated due to friction between the moving parts of the stamping device, which leads to thermal expansion of the various components of the stamping device. In particular, the vibration of the first pressing tool detected by the piezoelectric sensor depends on the temperature of the first pressing tool. Therefore, by detecting the temperature of the first pressing tool with the aid of a temperature sensor, the detected vibration can be optimized or adjusted by the controller, thereby improving the determination of the wear condition of the first and / or second pressing tools.

[0011] Furthermore, position sensors detect multiple positions of the first pressing tool relative to the second pressing tool. When the first pressing tool moves relative to the second pressing tool (particularly periodically), the vibration of the first pressing tool detected by the piezoelectric sensor depends on its respective position. Therefore, the vibration of the first pressing tool detected by the piezoelectric sensor (which is adjusted according to the detected temperature of the first pressing tool) can be evaluated by the controller based on the respective positions of the first pressing tools to determine the wear condition of the first and / or second pressing tools with particular precision.

[0012] In particular, the stamping apparatus includes a stamping tool and a stamping machine, wherein the stamping tool specifically includes first and second pressing tools, and the stamping machine specifically includes a stamping drive device in at least a portion of its area.

[0013] Specifically, the first pressing tool is the first upper pressing tool.

[0014] Specifically, the second pressing tool is the second pressing tool.

[0015] Specifically, semi-finished products include metal sheets and strips.

[0016] In particular, the stamping device is designed as an eccentric press.

[0017] In one embodiment, the stamping drive is designed to move the first pressing tool relative to the second pressing tool in a vertical direction of movement, particularly to move it periodically, while the position sensor is designed to detect multiple vertical movement positions of the first pressing tool relative to the second pressing tool.

[0018] This achieves a technical advantage by ensuring an effective stamping process through the movement of the first pressing tool relative to the second pressing tool along the vertical direction of movement. In the case of periodic movement, the first pressing tool moves vertically relative to the second pressing tool at a predetermined period, specifically moving periodically or continuously upward and downward along the vertical direction of movement.

[0019] The controller is designed to determine the wear condition of the first pressing tool and / or the second pressing tool based on the detected temperature of the first pressing tool, the detected vibration of the first pressing tool, and the detected multiple vertical movement positions.

[0020] At the upper moving position, the distance between the first pressing tool and the second pressing tool along the vertical moving direction is the greatest.

[0021] At the lower moving position, the distance between the first pressing tool and the second pressing tool along the vertical moving direction is the smallest.

[0022] In one embodiment, the second pressing tool is immovably arranged within the pressing device.

[0023] This achieves a technical advantage, namely that only the first pressing tool moves relative to the second pressing tool fixed in the stamping device.

[0024] In one embodiment, the first pressing tool has a fixing element (in particular a fixing plate), especially the movement of the fixing element relative to the second pressing tool by means of a stamping drive, the fixing element being able to abut against the upper side of the semi-finished product contained in the receiving area in order to fix the semi-finished product contained in the receiving area.

[0025] This achieves a technical advantage whereby the stamping drive moves the first pressing tool relative to the second pressing tool, causing the fixing element (especially the fixing plate) to abut against the upper side of the semi-finished product contained in the receiving area and thereby fixing the semi-finished product. Therefore, the fixing element (especially the fixing plate) acts as a clamping device for the semi-finished product.

[0026] In one embodiment, the first pressing tool has an intermediate plate connected to the upper side of a fixing element (particularly a fixing plate), wherein, in particular, a temperature sensor and / or a piezoelectric sensor is arranged on the intermediate plate.

[0027] The resulting technical advantage is that the intermediate plate arranged on the upper side of the fixed element is centrally positioned within the first pressing tool and has sufficient size to accommodate the temperature sensor and / or piezoelectric sensor.

[0028] In one embodiment, the first pressing tool has a top plate connected to the upper side of an intermediate plate, wherein the pressing device has at least one additional piezoelectric sensor disposed on the top plate and designed to detect additional vibrations of the first pressing tool, wherein the controller is designed to determine the wear condition of the first pressing tool and / or the second pressing tool based on the detected temperature of the first pressing tool, the detected vibration of the first pressing tool, other detected vibrations of the first pressing tool, and multiple detected locations of the first pressing tool.

[0029] This results in the following technical advantage: in addition to the piezoelectric sensors arranged particularly on the middle plate, other piezoelectric sensors arranged particularly on the top plate can effectively detect additional vibrations, thereby improving the determination of wear conditions by the controller.

[0030] In one embodiment, the first pressing tool has a pressing punch, wherein the pressing drive is designed to move the pressing punch relative to the second pressing tool in order to press a semi-finished product contained in a receiving area, wherein the pressing punch may be guided, in particular, through openings in a fixing element, an intermediate plate, and / or a top plate, in order to press the semi-finished product contained in the receiving area.

[0031] This achieves a technological advantage, namely that the pressing punch of the first pressing tool ensures effective pressing of the semi-finished product.

[0032] In particular, the stamping drive is designed to move the fixing element (in particular the fixing plate) of the first pressing tool relative to the second pressing tool in the first step so as to place the fixing element (in particular the fixing plate) on the upper side of the semi-finished product contained in the receiving area and fix the semi-finished product. The stamping drive is specifically designed to move the pressing punch relative to the second pressing tool through the opening of the fixing element in the second step after the first step, particularly in the direction of the second pressing tool, so as to stamp the fixed semi-finished product.

[0033] In one embodiment, the second pressing tool has a stabilizing element, particularly a cutting bottom mold (Schneidematrize), which can be placed at the bottom of the semi-finished product contained in the receiving area to stabilize the semi-finished product.

[0034] This achieves a technical advantage, namely, the stabilizing element of the second pressing tool, especially the cutting bottom mold, ensures effective stability of the semi-finished product from below. If, in particular, the fixing element of the first pressing tool also abuts against the upper side of the semi-finished product and fixes it, then effective stability or fixation of both sides of the semi-finished product between the first and second pressing tools can be ensured.

[0035] In one embodiment, the stabilizing element has a through hole into which a first pressing tool, particularly a pressing punch of the first pressing tool, can be inserted to press a semi-finished product disposed between the stabilizing element and the first pressing tool.

[0036] This achieves a technological advantage, namely, the first pressing tool, especially the pressing punch, passes through the semi-finished product into the through hole, thereby ensuring effective pressing of the semi-finished product.

[0037] In one embodiment, the stamping drive includes a rotary drive unit connected to an eccentric component driven by the rotary drive unit, wherein the eccentric component is connected to a first pressing tool to convert the rotary motion of the rotary drive unit into periodic vertical movement of the first pressing tool, particularly the pressing punch.

[0038] This achieves a technical advantage, namely, the eccentric component is connected to both the rotary drive unit and the first pressing tool, which advantageously converts the rotary motion of the rotary drive unit into the periodic linear motion of the first pressing tool, especially the pressing punch, particularly the periodic vertical movement.

[0039] In one embodiment, the position sensor includes a rotary encoder (Drehgeber) designed to detect multiple rotational positions of the rotary drive unit, wherein the controller is designed to determine multiple vertical movement positions of the first pressing tool, particularly the pressing punch, based on the detected multiple rotational positions of the rotary drive unit.

[0040] This achieves a technical advantage in that the rotary encoder detects the rotational position of the rotary drive unit, particularly the rotational angle, which can be advantageously converted by the controller into a vertical movement position, which the controller uses as the basis for determining the wear condition of the first and / or second pressing tools.

[0041] In one embodiment, the controller is designed to determine multiple pressures acting on the first pressing tool based on detected vibrations of the first pressing tool, wherein the controller is designed to adjust the multiple determined pressures according to the detected temperature of the first pressing tool to obtain multiple adjusted pressures, wherein the controller is designed to output the multiple adjusted pressures according to multiple detected positions of the first pressing tool to determine evaluation parameters, and wherein the controller is designed to compare the evaluation parameters with multiple reference parameters (Referenzcharakteristik) assigned to different wear conditions of the first pressing tool and / or the second pressing tool respectively, to determine the wear condition of the first pressing tool and / or the second pressing tool based on the comparison results.

[0042] This achieves a technological advantage by ensuring particularly effective wear detection of the first and / or second pressing tools through the controller.

[0043] The controller converts the vibration of the first pressing tool detected by the piezoelectric sensor into multiple pressures acting on the first pressing tool. The controller then adjusts these multiple pressures based on the temperature detected by the temperature sensor. These adjusted multiple pressures, within an evaluation parameter range, are then output by the controller based on multiple positions of the first pressing tool detected by the position sensor. The corresponding evaluation parameters enable the controller to draw conclusions regarding the wear condition of the first pressing tool and / or the second pressing tool.

[0044] To this end, the controller compares the determined evaluation parameters with multiple reference parameters, which are respectively assigned to different wear conditions of the first pressing tool and / or the second pressing tool. The corresponding reference parameters are, for example, determined in previous measurements under known wear conditions of the first pressing tool and / or the second pressing tool. Based on the comparison between the evaluation parameters and the multiple reference parameters, the controller can advantageously determine the wear condition of the first pressing tool and / or the second pressing tool.

[0045] In one embodiment, the temperature sensor includes a resistive element, wherein the temperature sensor is designed to associate the resistance applied to the resistive element with a corresponding detected temperature value.

[0046] This achieves a technological advantage, namely that the temperature sensor ensures particularly favorable temperature measurements.

[0047] According to the second aspect, the aforementioned objective is achieved by a method for determining the wear condition of a first pressing tool and / or a second pressing tool of a stamping apparatus for stamping a semi-finished product, the stamping apparatus having a first pressing tool, a second pressing tool, a receiving area for receiving the semi-finished product disposed between the first pressing tool and the second pressing tool, a stamping drive device, and a controller, the stamping drive device being designed to move the first pressing tool relative to the second pressing tool to stamp the semi-finished product contained in the receiving area, the method comprising the following steps: detecting the temperature of the first pressing tool by means of a temperature sensor disposed in the first pressing tool; detecting the vibration of the first pressing tool by means of at least one piezoelectric sensor disposed in the first pressing tool; detecting multiple positions of the first pressing tool relative to the second pressing tool by means of at least one position sensor disposed in the stamping apparatus; and determining the wear condition of the first pressing tool and / or the second pressing tool by means of the controller based on the detected temperature of the first pressing tool, based on the detected vibration of the first pressing tool, and based on the detected multiple positions of the first pressing tool.

[0048] This method can ensure effective wear detection of the first and / or second pressing tools.

[0049] In one embodiment, determining the wear condition includes the following sub-steps: determining multiple pressures acting on the first pressing tool based on vibrations detected by a piezoelectric sensor; adjusting the determined pressures based on a detected temperature of the first pressing tool to obtain multiple adjusted pressures; outputting multiple adjusted pressures based on multiple detected positions of the first pressing tool to determine evaluation parameters; comparing these evaluation parameters with multiple reference parameters, which are respectively matched to different wear conditions of the first pressing tool and / or the second pressing tool, to determine the wear condition of the pressing tool and / or the second pressing tool based on the comparison results.

[0050] This achieves a technological advantage by ensuring the effective determination of the wear condition of the first and / or second pressing tools.

[0051] All embodiments of the stamping apparatus indicated according to the first aspect are equally valid as embodiments of the method according to the second aspect. Attached Figure Description

[0052] The invention will now be described in more detail with reference to embodiments and accompanying drawings. Wherein:

[0053] Figure 1 This is a perspective view of the stamping device according to the first embodiment;

[0054] Figure 2 It is a perspective view of the intermediate plate of the first pressing tool of the stamping device according to another embodiment;

[0055] Figure 3 AC is a schematic diagram of the movement of the first pressing tool of the stamping apparatus according to another embodiment;

[0056] Figure 4 AB is a schematic diagram of a piezoelectric sensor for the first pressing tool of a stamping device of an eccentric press, according to a further embodiment.

[0057] Figure 5 It is a perspective view of the top plate of the first pressing tool of a stamping device, based on another example; and

[0058] Figure 6 This is a schematic diagram of a method for determining the wear condition of a stamping device according to another embodiment. Detailed Implementation

[0059] In the following detailed description, reference is made to the accompanying drawings, which form a part of this document, in which specific embodiments of the invention may be practiced are shown as illustrations. It will be understood that other embodiments may be used, and structural or logical changes may be made, without departing from the concept of the invention. Therefore, the following detailed description should not be construed as limiting. It will be further understood that, unless otherwise specifically stated, the features of the various embodiments described herein may be combined.

[0060] Various aspects and embodiments of the present invention will be described with reference to illustrations, wherein similar reference numerals generally refer to similar elements. In the following description, numerous specific details are set forth for purposes of explanation in order to provide a thorough understanding of one or more aspects of the invention.

[0061] Figure 1 A perspective view of a stamping apparatus according to a first embodiment is shown.

[0062] Figure 1 The stamping device 100 shown is designed for pressing... Figure 1 The semi-finished product 101 shown in the diagram is stamped, and the semi-finished product 101 includes, in particular, sheet and strip metal.

[0063] Specifically, the semi-finished product 101 (especially sheet metal strip) is continuously fed into the stamping device 100, and the stamping device 100 is designed to stamp multiple parts from the semi-finished product 101 (especially sheet metal strip) in multiple consecutive stamping operations.

[0064] Here, the stamping process specifically includes at least partially deforming the semi-finished product 101 (especially sheet metal strip), at least partially introducing through holes into the semi-finished product 101 (especially sheet metal strip), and / or shearing the semi-finished product 101 (especially sheet metal strip) to stamp out a part.

[0065] exist Figure 1 The image shows only the pressing tool of the stamping device 100, but not the stamping machine of the stamping device 100.

[0066] Therefore, the stamping device 100, especially Figure 1 The pressing tool of the stamping device 100 shown includes a first pressing tool 103 and a second pressing tool 105, particularly the upper first pressing tool 103 and the lower second pressing tool 105.

[0067] The stamping device 100 has a receiving area 107 arranged between a first pressing tool 103 and a second pressing tool 105 for receiving a semi-finished product 101. Figure 1 In the middle, the first pressing tool 103 and the second pressing tool 105 abut against the semi-finished product 101 contained in the containing area 107, so the containing area 107 is only shown schematically.

[0068] exist Figure 1 The stamping drive 109 of the stamping device 100, which is only partially shown in the figure, is designed to move the first pressing tool 103 relative to the second pressing tool 105 in order to stamp the semi-finished product 101 contained in the receiving area 107.

[0069] The stamping drive 109 is designed to move the first pressing tool 103 relative to the second pressing tool 105 along the vertical movement direction 111, in particular to move it periodically.

[0070] Through the periodic movement of the first pressing tool 103, the first pressing tool 103 moves away from the second pressing tool 105 in a first moving step along the vertical moving direction 111, especially in Figure 1 The view shown is moved upwards to create sufficient distance between the first pressing tool 103 and the second pressing tool 105, thereby allowing the semi-finished product 101 to be introduced into the receiving area 107.

[0071] Through the periodic movement of the first pressing tool 103, in the second moving step following the first moving step, the first pressing tool 103 moves towards the second pressing tool 105 along the vertical moving direction 111, particularly moving downwards, to achieve... Figure 1 In the state shown, the semi-finished product 101 contained in the receiving area 107 between the first pressing tool 103 and the second pressing tool 105 can be advantageously stamped.

[0072] If the periodic movement of the first pressing tool 103 along the vertical moving direction 111 is in harmony with the semi-finished product 101 (especially metal sheet / strip) Figure 1 The combination of continuous horizontal movement (not shown) allows a large number of parts to be punched out of the semi-finished product 101 during continuous stamping.

[0073] For this purpose, the second pressing tool 105 is specifically arranged in a non-movable manner within the stamping device 100, so that the position of the second pressing tool 105 is not changed. Therefore, only the first pressing tool 103 moves relative to the fixedly arranged second pressing tool 105, particularly moving periodically along the vertical movement direction 111.

[0074] Figure 1 The stamping drive device 109, shown only schematically, specifically includes a rotary drive unit connected to an eccentric component driven by the rotary drive unit, wherein the eccentric component is connected to a first pressing tool 103 to convert the rotational motion of the rotary drive unit into periodic vertical movement of the first pressing tool 103 along the vertical movement direction 111. Figure 1 The rotary drive unit and eccentric components are not shown in the image. Further details are in... Figure 3 A, 3B, and 3C are shown.

[0075] The various components of the first pressing tool 103 will now be discussed below.

[0076] The first pressing tool 103 has a fixing element 113 (in particular a fixing plate), and the fixing element 113, which is moved relative to the second pressing tool 105 by means of the stamping drive device 109, can abut against the upper side of the semi-finished product 101 contained in the receiving area 107 in order to fix the semi-finished product 101 contained in the receiving area 107.

[0077] The fixing element 113 (in particular the fixing plate) thus serves as a clamping device for the semi-finished product 101 contained in the receiving area 107.

[0078] The first pressing tool 103 further includes an intermediate plate 115, which is connected to the upper side of the fixing element 113 (particularly the fixing plate).

[0079] The first pressing tool 103 further includes a top plate 117, which is connected to the upper side of the intermediate plate 115. In particular, a punch fixing plate 116 and a pressure plate 118 may be arranged between the intermediate plate 115 and the top plate 117.

[0080] The first pressing tool 103 further includes an upper clamping plate 119, which is connected to the upper side of the intermediate plate 115 and, in particular, closes the first pressing tool 103 on the upper side.

[0081] As in Figure 1 As shown only schematically, the fixing element 113 (in particular the fixing plate), the intermediate plate 115, the punch fixing plate 116, the pressure plate 118 and / or the top plate 117 are interconnected, particularly by screws, to ensure the overall structure of the first pressing tool 103.

[0082] The first pressing tool 103 has a pressing punch 121, wherein the pressing drive 109 is designed to move the pressing punch 121 relative to the second pressing tool 105 in order to press the semi-finished product contained in the receiving area 107. Figure 1 As can be seen, the pressing punch 121 can be specifically guided through the openings in the fixing element 113, the intermediate plate 115, the punch fixing plate 116, the pressure plate 118 and the top plate 117 in order to press the semi-finished product 101 contained in the receiving area 107.

[0083] In particular, in the first step, the first pressing tool 103, especially the fixing element 113, is placed on the upper side of the semi-finished product 101 to fix the semi-finished product 101, and in the second step after the first step, the pressing punch 121 moves relative to the fixing element 113 to press the semi-finished product 101 contained in the receiving area 107.

[0084] The various components of the second pressing tool 105 will now be discussed below.

[0085] The second pressing tool 105 has a stabilizing element 123, specifically a cutting bottom mold, which can be placed on the bottom surface of the semi-finished product 101 contained in the receiving area 107 to stabilize the semi-finished product 101. The stabilizing element 123, specifically the cutting bottom mold, thus ensures effective bottom support for the semi-finished product 101.

[0086] In this configuration, the stabilizing element 123 has a through-hole 125 into which the pressing punch 121 of the first pressing tool 103 can be inserted to press the semi-finished product 101 disposed between the stabilizing element 123 and the first pressing tool 103. The waste material from the punched-out semi-finished product 101 can fall through the through-hole 125 and be discharged from the pressing device 100.

[0087] The second pressing tool 105 specifically includes a base plate 127 connected to the bottom surface of the stabilizing element 123, and specifically includes a lower clamping plate 129 connected to the bottom surface of the base plate 127, and specifically closes the bottom surface of the second pressing tool 105. Figure 1 It can be seen that the base plate 127 is connected to the stabilizing element 123, especially by screws.

[0088] Conventional stamping equipment typically lacks a sensing system, making it difficult to inspect the wear condition of conventional stamping equipment. Consequently, damage to conventional stamping equipment is often only discovered when the equipment completely fails or the stamped parts no longer meet the required quality standards.

[0089] In order to detect the wear condition of the first and / or second pressing tools 103, 105, the stamping apparatus 100 according to this application includes a plurality of sensors for detecting parameters, which are evaluated by the controller of the stamping apparatus 100.

[0090] According to this application, the first pressing tool 103, particularly the intermediate plate 115, has at least one temperature sensor 131 designed to detect the temperature of the first pressing tool 103, and the first pressing tool 103, particularly the intermediate plate 115, has at least one piezoelectric sensor 133 designed to detect the vibration of the first pressing tool 103. The temperature sensor 131 and the piezoelectric sensor 133 are... Figure 1 The image is shown only schematically.

[0091] At least one piezoelectric sensor 133 can detect the vibration of the stamping device 100. Here, each stamping device 100 has an individual vibration curve, which can be monitored by the piezoelectric sensor 133. In particular, during the continuous production process of manufacturing stamped parts, the individual vibration curve of the corresponding stamping device 100 will change, and the corresponding change of the individual vibration curve can be detected by the piezoelectric sensor 133. For a corresponding schematic diagram of the piezoelectric sensor 133 and its function, see [reference needed]. Figure 4 Implementation methods A and 4B.

[0092] Heat is generated due to friction between the various components of the stamping device 100, especially between the semi-finished product 101 and the first and / or second pressing tools 103, 105, resulting in thermal expansion of the first and / or second pressing tools 103, 105.

[0093] In particular, there is a correlation between the temperature of the first pressing tool 103 detected by temperature sensor 131 and the corresponding vibration of the first pressing tool 103 detected by piezoelectric sensor 133. Therefore, it is advantageous to place the temperature sensor 131 and the piezoelectric sensor 133 near the space of the first pressing tool 103, especially in the intermediate plate 115. For a corresponding description of the temperature sensor 131 and the piezoelectric sensor 133 on the first pressing tool 103, see [link to relevant documentation]. Figure 2 The implementation method in the text.

[0094] The stamping device 100 further includes at least one in Figure 1The position sensor 135, not shown, is designed to detect multiple positions of the first pressing tool 103 relative to the second pressing tool 105, particularly the vertical movement position.

[0095] In this case, the position sensor 135 specifically includes a rotary encoder, which is designed to detect the rotational position of the rotary drive unit of the stamping drive 109, wherein... Figure 1 The controller 137 of the stamping device 100, which is not shown in the figure, is designed to determine multiple vertical movement positions of the first pressing tool 103, and in particular multiple vertical movement positions of the pressing punch 121, based on the detected rotational position of the rotary drive unit.

[0096] For the correlation between the corresponding rotational position of the rotary drive unit of the stamping driver 109 and the corresponding vertical movement position of the pressing punch 121 of the first pressing tool 103, please refer to the following. Figure 3 A, 3B, and 3C.

[0097] exist Figure 1 The controller 137 of the stamping device 100 (not shown) is designed to determine the wear condition of the first pressing tool 103 and / or the second pressing tool 105 based on the temperature of the first pressing tool 103 detected by the temperature sensor 131, the vibration of the first pressing tool 103 detected by the piezoelectric sensor 133, and multiple positions of the first pressing tool 103 (especially the pressing punch 121), particularly multiple vertical movement positions.

[0098] For further details regarding the determination of the wear condition of the first pressing tool 103 and / or the second pressing tool 105 by the controller 137 based on the detected parameters, please refer to the following description.

[0099] Therefore, the stamping apparatus 100 according to this disclosure can continuously monitor its condition, which provides a basis for predictive maintenance of the stamping apparatus 100. Specifically, once the wear condition of the first pressing tool 103 and / or the second pressing tool 105 reaches a critical value, it can be identified so that maintenance can be performed on the first pressing tool 103 and / or the second pressing tool 105 before the stamping apparatus 100 completely fails, or before the quality of the parts stamped by the stamping apparatus 100 deteriorates to the point that these parts must be discarded. In this way, unnecessary downtime of the stamping apparatus 100 can be avoided and reduced, and additional costs can be avoided.

[0100] Figure 2 A perspective view of the intermediate plate of the first pressing tool of a stamping apparatus according to another embodiment is shown.

[0101] Figure 2The intermediate plate 115 of the first pressing tool 103 of the stamping apparatus 100 is shown. For more precise details about the stamping apparatus 100 and the first pressing tool 103, please refer to... Figure 1 Explanation.

[0102] from Figure 2 It can be seen that the temperature sensor 131 and the piezoelectric sensor 133 are arranged close to each other in space. Since the vibration of the first pressing tool 103 (especially the intermediate plate 115) detected by the piezoelectric sensor 133 depends on the temperature of the first pressing tool 103, especially the temperature of the intermediate plate 115, detected by the temperature sensor 131, the corresponding parameters can be effectively detected by the two sensors that are close to each other in space.

[0103] Figure 3 A, 3B, and 3C show schematic diagrams illustrating the movement of the first pressing tool in a stamping device designed as an eccentric press according to another embodiment.

[0104] Figure 3 A, 3B, and 3C illustrate respective portions of a stamping apparatus 100 with a stamping drive 109. Here, the stamping drive 109 includes a rotary drive unit 139 connected to an eccentric member 141, which is coupled to the pressing punch 121 of the first pressing tool 103 of the stamping apparatus 100. The rotational motion of the rotary drive unit 139 is converted by the eccentric member 141 into periodic vertical movement of the pressing punch 121 of the first pressing tool 103, thereby causing the pressing punch 121 of the first pressing tool 103 to move along the vertical movement direction 111.

[0105] Through Figure 3 The position sensor 135, designed as a rotary encoder, is only schematically shown in A, 3B, and 3C. Figure 3 Each of the conditions shown in A, 3B, and 3C determines the rotational position of the rotary drive unit 139. Figure 3 In A, the determined rotation position is 90°. Figure 3 In B, the determined rotation position is 120°, while... Figure 3 In C, the determined rotation position is 160°.

[0106] The corresponding rotational position of the rotary drive unit 139, detected by the position sensor 135 (in particular the rotary encoder), is associated with the vertical movement position of the pressing punch 121 of the first pressing tool 103.

[0107] from Figure 3A, 3B, and 3C suggest that the top dead center, i.e., the maximum upward offset of the pressing punch 121 of the first pressing tool 103, is obtained when the rotational position is 0° or 360°.

[0108] from Figure 3 From A, 3B, and 3C, it can be deduced that the lower stop point, i.e., the maximum downward offset of the pressing punch 121 of the first pressing tool 103, which is the pressing position, is obtained at a 180° rotation position.

[0109] from Figure 3 A, 3B, and 3C suggest that the pressing punch 121 can move periodically between the lower dead center (i.e., the maximum downward offset of the pressing punch 121 of the first pressing tool 103) and the upper dead center (i.e., the maximum upward offset of the pressing punch 121 of the first pressing tool 103).

[0110] Here, the corresponding rotational position, measured in angles, detected by the position sensor 135 (particularly a rotary encoder) is directly correlated with the vertical movement position of the first pressing tool 103 along the vertical movement direction 111. The controller 137 is designed to determine the vertical movement position of the pressing punch 121 of the first pressing tool 103 based on the detected rotational position of the rotary drive unit 139.

[0111] Figure 3 The position sensor 135 shown in A to 3C is only applicable to the stamping device 100 designed as an eccentric press.

[0112] Figure 4 A and 4B show schematic diagrams of a piezoelectric sensor for the first pressing tool of a stamping apparatus according to another embodiment. The piezoelectric sensor 133 is designed to detect vibrations of the first pressing tool.

[0113] Figure 4 A shows that when no force is applied to the piezoelectric sensor 133, the two electrical centers of gravity are exactly at the center of the sensor, so the piezoelectric sensor 133 is electrically neutral.

[0114] from Figure 4 As can be seen from B, when a force is applied to the piezoelectric sensor 133, the two electric centers of gravity move away from the center of the piezoelectric sensor 133, thereby generating a potential difference, which is output as a voltage by the piezoelectric sensor 133.

[0115] Therefore, there is a correlation between the vibration of the first pressing tool 103 measured by the piezoelectric sensor 133 and the force acting on the first pressing tool 103.

[0116] Therefore, the controller 137 is designed to determine multiple forces acting on the first pressing element 103 based on the vibration detected by the piezoelectric sensor 133.

[0117] Due to the temperature dependence of the force, the controller 137 is designed to adjust multiple determined pressures based on the temperature of the first pressing tool 103 detected by the temperature sensor 131 to obtain multiple adjusted pressures.

[0118] If the position sensor 135, particularly the speed sensor, further provides the controller 137 with multiple positions of the first pressing tool 103 (particularly the pressing punch 121), particularly multiple vertical movement positions, the controller 137 can determine evaluation parameters, which are determined by multiple adjusted pressures as a function of the multiple positions (particularly the vertical movement positions) of the detected first pressing tool 103 (particularly the pressing punch 121).

[0119] The controller 137 is then designed to compare the determined evaluation parameters with a plurality of reference parameters that are respectively matched to different wear conditions of the first pressing tool 103 and / or the second pressing tool 105, so as to determine the wear condition of the first pressing tool 103 and / or the second pressing tool 105 based on the comparison.

[0120] In this way, effective wear monitoring of the first pressing tool 103 and / or the second pressing tool 105 can be ensured.

[0121] Figure 5 A perspective view of the top plate of the first pressing tool of a stamping apparatus according to another embodiment is shown.

[0122] from Figure 5 It can be seen that another piezoelectric sensor 133 is arranged in the top plate 117 of the first pressing tool 103 of the stamping device 100, which is specifically arranged separately from the piezoelectric sensor 133 in the intermediate plate 115 of the first pressing tool 103.

[0123] By having the controller 137 take into account the vibration of the first pressing tool 103 detected by the piezoelectric sensor 133 of the intermediate plate 115 and other vibrations of the first pressing tool 103 detected by another electrical sensor 133 of the top plate 117, the determination of the wear condition of the first pressing tool 103 and / or the second pressing tool 105 can be advantageously improved.

[0124] Figure 6 A schematic diagram of a method for determining the wear condition of a stamping device according to another embodiment is shown.

[0125] The method includes, as a first method step, detecting the temperature of the first pressing tool 103 by means of a temperature sensor 131 arranged in the first pressing tool 103.

[0126] The method includes, as a second method step, detecting 203 vibrations of the first pressing tool 103 by means of at least one piezoelectric sensor 133 arranged in the first pressing tool 103.

[0127] The method includes, as a third method step, detecting, 205, multiple positions of the first pressing tool 103 relative to the second pressing tool 105 by means of at least one position sensor 135 arranged in the stamping device 100.

[0128] The method includes, as a fourth method step, determining, 207, the wear condition of the first pressing tool 103 and / or the second pressing tool 105 by a controller 137 based on the detected temperature of the first pressing tool 103, the detected vibration of the first pressing tool 103, and multiple detected positions of the first pressing tool 103.

[0129] List of reference numerals

[0130] 100 stamping device

[0131] 101 Semi-finished products

[0132] 103 First Suppression Tool

[0133] 105 Second compression tool

[0134] 107 Accommodation Area

[0135] 109 Stamp Drive

[0136] 111 Vertical movement direction

[0137] 113 Fixed components

[0138] 115 Intermediate Plate

[0139] 116 Punch fixing plate

[0140] 117 Top Plate

[0141] 118 pressure plate

[0142] 119 Upper splint

[0143] 121 Pressing punch

[0144] 123 Stabilizing Components

[0145] 125 through hole

[0146] 127 base plate

[0147] 129 Lower clamping plate

[0148] 131 Temperature Sensor

[0149] 133 Piezoelectric Sensor

[0150] 135 Position Sensor

[0151] 137 Controller

[0152] 139 Rotary Drive Unit

[0153] 141 Eccentric component

[0154] 200 Method for determining the wear condition of stamping equipment

[0155] 201 First method step: Temperature detection

[0156] 203 Second method step: Vibration detection

[0157] 205 Third method step: Detect the position of the first pressing tool

[0158] 207 Fourth Method Step: Determine Wear Condition

Claims

1. A stamping apparatus (100) for stamping a semi-finished product (101), comprising: First suppression tool (103), Second compression tool (105), A receiving area (107) for receiving the semi-finished product (101) is arranged between the first pressing tool (103) and the second pressing tool (105). A stamping drive (109) is designed to move the first pressing tool (103) relative to the second pressing tool (105) to stamp the semi-finished product (101) housed in the receiving area (107). The first pressing tool (103) has at least one temperature sensor (131) designed to detect the temperature of the first pressing tool (103). The first pressing tool (103) has at least one piezoelectric sensor (133) designed to detect vibrations of the first pressing tool (103). The stamping device (100) includes at least one position sensor (135) designed to detect multiple positions of the first pressing tool (103) relative to the second pressing tool (105). A controller (137) is designed to determine the wear condition of the first pressing tool (103) and / or the second pressing tool (105) based on the detected temperature of the first pressing tool (103), the detected vibration of the first pressing tool (103), and multiple detected positions of the first pressing tool (103). The controller (137) is designed to determine multiple pressures acting on the first pressing tool (103) based on detected vibrations of the first pressing tool (103). The controller (137) is designed to adjust multiple determined pressures based on the detected temperature of the first pressing tool (103) to obtain multiple adjusted pressures. The controller (137) is designed to output multiple adjusted pressures based on multiple detected positions of the first pressing tool (103) to determine evaluation parameters. The controller (137) is designed to compare the evaluation parameters with a plurality of reference parameters that are respectively matched to different wear conditions of the first pressing tool (103) and / or the second pressing tool (105) in order to determine the wear condition of the first pressing tool (103) and / or the second pressing tool (105).

2. The stamping device (100) according to claim 1, wherein, The stamping drive device (109) is designed to move the first pressing tool (103) relative to the second pressing tool (105) in a vertical movement direction (111), and the position sensor (135) is designed to detect multiple vertical movement positions of the first pressing tool (103) relative to the second pressing tool (105).

3. The stamping device (100) according to claim 2, wherein, The first pressing tool (103) moves periodically relative to the second pressing tool (105) along the vertical moving direction (111).

4. The stamping apparatus (100) according to any one of claims 1 to 3, wherein, The second pressing tool (105) is arranged in a non-movable manner within the stamping device (100).

5. The stamping apparatus (100) according to any one of claims 1 to 3, wherein, The first pressing tool (103) has a fixing element (113) that can abut against the upper side of the semi-finished product (101) contained in the receiving area (107) by means of the stamping drive device (109) relative to the second pressing tool (105), thereby fixing the semi-finished product (101) contained in the receiving area (107).

6. The stamping device (100) according to claim 5, wherein, The fixing element (113) is a fixing plate.

7. The stamping device (100) according to claim 5, wherein, The first pressing tool (103) includes an intermediate plate (115) connected to the upper side of the fixing element (113), wherein the temperature sensor (131) and / or the piezoelectric sensor (133) are arranged on the intermediate plate (115).

8. The stamping apparatus (100) according to claim 7, wherein, The fixing element (113) is a fixing plate.

9. The stamping apparatus (100) according to claim 7, wherein, The first pressing tool (103) has a top plate (117) connected to the upper side of the intermediate plate (115), wherein the stamping device (100) has at least one additional piezoelectric sensor (133) arranged on the top plate (117) and designed to detect other vibrations of the first pressing tool (103), wherein the controller (137) is designed to determine the wear condition of the first pressing tool (103) and / or the second pressing tool (105) based on the detected temperature of the first pressing tool (103), the detected vibration of the first pressing tool (103), other detected vibrations of the first pressing tool (103), and multiple detected positions of the first pressing tool (103).

10. The stamping apparatus (100) according to claim 9, wherein, The first pressing tool (103) includes a pressing punch (121), wherein the pressing drive (109) is designed to move the pressing punch (121) relative to the second pressing tool (105) to press the semi-finished product (101) contained in the receiving area (107), wherein the pressing punch (121) can be guided through openings in the fixing element (113), the intermediate plate (115) and / or the top plate (117) to press the semi-finished product (101) contained in the receiving area (107).

11. The stamping apparatus (100) according to any one of claims 1 to 3, wherein, The second pressing tool (105) has a stabilizing element (123) that can abut against the bottom side of the semi-finished product (101) contained in the receiving area (107) to stabilize the semi-finished product (101).

12. The stamping apparatus (100) according to claim 11, wherein, The stabilizing element (123) is the cutting bottom mold.

13. The stamping apparatus (100) according to claim 11, wherein, The stabilizing element (123) has a through hole (125) into which the first pressing tool (103) can be introduced to press the semi-finished product (101) disposed between the stabilizing element (123) and the first pressing tool (103).

14. The stamping apparatus (100) according to claim 13, wherein, The pressing punch (121) of the first pressing tool (103) can be introduced into the through hole.

15. The stamping apparatus (100) according to any one of claims 1 to 3, wherein, The stamping drive device (109) includes a rotary drive unit (139) connected to an eccentric component (141) driven by the rotary drive unit (139), wherein the eccentric component (141) is coupled to the first pressing tool (103) so as to convert the rotational motion of the rotary drive unit (139) into the periodic vertical movement of the first pressing tool (103).

16. The stamping apparatus (100) according to claim 15, wherein, The eccentric component (141) is coupled to the first pressing tool (103) so as to convert the rotational motion of the rotary drive unit (139) into the periodic vertical movement of the pressing punch (121) of the first pressing tool (103).

17. The stamping apparatus (100) according to claim 15, wherein, The position sensor (135) includes a rotary encoder designed to detect multiple rotational positions of the rotary drive unit (139), wherein the controller (137) is designed to determine multiple vertical movement positions of the first pressing tool (103) based on the detected multiple rotational positions of the rotary drive unit (139).

18. The stamping apparatus (100) according to claim 17, wherein, The controller (137) is designed to determine multiple vertical movement positions of the pressing punch (121) of the first pressing tool (103) based on multiple rotational positions of the detected rotary drive unit (139).

19. The stamping apparatus (100) according to any one of claims 1 to 3, wherein, The temperature sensor (131) includes a resistive element, wherein the temperature sensor (131) is designed to associate the resistance applied to the resistive element with a corresponding detected temperature value.

20. A method (200) for determining the wear condition of a first pressing tool (103) and / or a second pressing tool (105) of a stamping apparatus (100) for stamping a semi-finished product (101), wherein, The stamping apparatus (100) includes a first pressing tool (103), a second pressing tool (105), a receiving area (107) disposed between the first pressing tool (103) and the second pressing tool (105) for receiving a semi-finished product (101), a stamping drive device (109), and a controller (137). The stamping drive device (109) is designed to move the first pressing tool (103) relative to the second pressing tool (105) to stamp the semi-finished product (101) contained in the receiving area (107). The method (200) includes the following method steps: The temperature of the first pressing tool (103) is detected (201) by a temperature sensor (131) arranged in the first pressing tool (103). The vibration of the first pressing tool (103) is detected (203) by at least one piezoelectric sensor (133) arranged in the first pressing tool (103). Multiple positions of the first pressing tool (103) relative to the second pressing tool (105) are detected (205) by at least one position sensor (135) arranged in the stamping device (100), and Based on the detected temperature of the first pressing tool (103), the detected vibration of the first pressing tool (103), and multiple detected positions of the first pressing tool (103), the controller (137) determines (207) the wear condition of the first pressing tool (103) and / or the second pressing tool (105). The determination of the wear condition (207) includes the following sub-steps: Multiple pressures acting on the first pressing tool (103) are determined based on the vibrations of the first pressing tool (103) detected by the piezoelectric sensor (133). The pressure is adjusted based on the detected temperature of the first pressing tool (103) to obtain multiple adjusted pressures. The evaluation parameters are determined based on the multiple adjusted pressures output from multiple locations of the first pressing tool (103) detected. The evaluation parameters are compared with a plurality of reference parameters that are respectively matched to different wear conditions of the first pressing tool (103) and / or the second pressing tool (105), thereby determining the wear condition of the first pressing tool (103) and / or the second pressing tool (105) based on the comparison.

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