A transfer platform integrated in a stamping die

Abstract

The utility model relates to the technical field of transfer platform, specifically disclose a transfer platform integrated in stamping die, including X axis translation mechanism, fixed frame and platform body, the both ends of platform body are equipped with auxiliary positioning turnover platform, are installed on X axis translation mechanism and fixed frame respectively, the both sides symmetrical sliding of platform body are equipped with the mobile module connected with X axis translation mechanism, and can be under the action of X axis translation mechanism along X axis direction and translate, be equipped with Z axis lifting mechanism on mobile module, the movable end of Z axis lifting mechanism is equipped with Y axis translation mechanism, the movable end of Y axis translation mechanism is equipped with dog platform, and three groups of open -and -shut clamping mechanisms are arranged in parallel on dog platform along X axis direction. The utility model reduces the manpower cost investment, ensures the continuity and stability of production process, effectively improves production efficiency, and alleviates the work intensity of operating personnel.

Description

Technical Field

[0001] This utility model belongs to the field of transfer platform technology, specifically relating to a transfer platform integrated into a stamping die. Background Technology

[0002] In modern manufacturing, stamping is a highly efficient and precise forming method widely used in many fields such as automobiles, electronics, and home appliances. Among them, the punch press, also known as a stamping press, plays an important role in industrial production due to its powerful stamping capabilities, which can meet the needs of large-scale production of various complex workpieces.

[0003] However, in the current stamping production process, the transfer of workpieces within the mold still mainly relies on manual operation. This traditional method has revealed many problems that urgently need to be solved in production practice, seriously restricting the improvement of production efficiency, product quality, and production safety. The main problems are as follows:

[0004] Firstly, manual workpiece handling has significant efficiency drawbacks. In the continuous process of stamping production, the transfer of workpieces within the mold requires operators to complete the picking and placing actions within a very short time to ensure the compactness and continuity of the entire production rhythm. However, manual operation is limited by human physiological reaction speed and operational proficiency, making it difficult to achieve ideal efficiency. Especially when facing high-frequency stamping production tasks, the speed of manual handling is far from meeting production demands, leading to increased equipment waiting time, a significant reduction in overall production efficiency, and a prolonged product production cycle.

[0005] Secondly, the weight of the workpieces and the handling methods place a heavy burden on operators, leading to a series of safety hazards. Operators need to frequently bend over, reach out, and lift these heavy workpieces. Prolonged heavy physical labor makes operators prone to fatigue, decreased physical function, and difficulty concentrating. Under these circumstances, the probability of operator errors during workpiece handling increases significantly, such as workpieces slipping or colliding with molds. This can not only damage the workpieces and affect product quality but also cause serious physical injuries to the operator, such as crush injuries or sprains. Furthermore, fatigue reduces the operator's awareness of their surroundings, increasing the risk of other safety accidents and posing a significant challenge to the company's safe production.

[0006] Third, for punch presses with multi-station designs, multiple people are often required to work together, which further exacerbates the difficulties of manual operation, increases the difficulty of on-site management, and increases the company's human resource costs.

[0007] Therefore, we propose a transfer platform integrated into the stamping die to solve the above-mentioned technical problems. Utility Model Content

[0008] In order to solve the technical problems existing in the prior art, this utility model proposes a transfer platform integrated into the stamping die.

[0009] The technical solution adopted in this utility model is as follows:

[0010] A transfer platform integrated into a stamping die includes an X-axis translation mechanism, a fixed frame, and at least one platform body. Auxiliary positioning and turnover platforms are provided at both the front and rear ends of the platform body, respectively mounted on the X-axis translation mechanism and the fixed frame. Moving modules are symmetrically slidably arranged on both sides of the platform body. Both moving modules are connected to the X-axis translation mechanism and can translate along the X-axis direction under the action of the X-axis translation mechanism. A Z-axis lifting mechanism is provided on each moving module. A Y-axis translation mechanism is provided at the movable end of the Z-axis lifting mechanism. A jaw platform is provided at the movable end of the Y-axis translation mechanism. Three sets of opening and closing clamping mechanisms are arranged parallel to each other along the X-axis direction on the jaw platform, enabling the transfer of the stamped workpiece along the direction of the front auxiliary positioning and turnover platform, the platform body, and the rear auxiliary positioning and turnover platform.

[0011] In a further technical solution, the X-axis translation mechanism includes a base plate, a first drive cylinder, and a linkage bracket. The first drive cylinder and the auxiliary positioning and turnover platform are both fixedly installed on the base plate. The linkage bracket is slidably installed on the base plate. The output end of the first drive cylinder is connected to the linkage bracket. The two ends of the linkage bracket are respectively provided with linkage rods, and the linkage rods are respectively connected to the moving module on the adjacent side.

[0012] In a further technical solution, the Z-axis lifting mechanism includes a second drive cylinder, which is mounted on the moving module, and the Y-axis translation mechanism is mounted on the output end of the second drive cylinder.

[0013] In a further technical solution, the Y-axis translation mechanism includes a support platform and a third drive cylinder. The support platform is installed at the output end of the second drive cylinder, and the claw platform is installed at the output end of the third drive cylinder and slidably mounted on the support platform.

[0014] In a further technical solution, the opening and closing clamping mechanism includes a connecting plate, a clamping seat, a clamping plate, a pressure head, and a return spring. One end of the connecting plate is connected to the jaw platform, and the other end is connected to the clamping seat. The clamping plate is hinged to the clamping seat. The pressure head and the return spring are respectively installed on both sides of the clamping plate. The return spring is connected to the clamping seat, which can keep the pressure head moving towards the clamping seat.

[0015] In a further technical solution, the pressure head includes a screw and a clamping block. The screw passes through the clamping plate and has nuts threaded on both sides of the clamping plate. The clamping block is threaded to one end of the screw located at the clamping seat.

[0016] In a further technical solution, the clamping seat has a bracket on one side of the return spring, and a distance sensor is provided at the bottom of the bracket, with the distance sensor located above the clamping plate.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0018] 1. This utility model realizes the automated operation of transferring stamped workpieces in intermediate processes, eliminating the need for a large number of people to handle and hand over workpieces between processes, reducing labor costs. Moreover, its periodic operation mode ensures the continuity and stability of the production process, effectively improving production efficiency, reducing the workload of operators, reducing the possibility of operational errors caused by fatigue, and thus reducing the risk of safety accidents.

[0019] 2. This utility model has flexible scalability. The number of platform bodies can be increased or decreased according to actual production needs, which can meet the production needs of different stamping processes. It takes into account both production flexibility and efficiency, and has high practicality.

[0020] 3. The pressure head in the opening and closing clamping mechanism of this utility model adopts an assembled structure design, which can flexibly adjust the distance between the clamping block and the clamping seat, thereby quickly adapting to stamping workpieces of different thicknesses, ensuring a stable and reliable clamping effect during the clamping process, and facilitating disassembly and assembly, greatly simplifying the replacement and maintenance of the equipment in the later stages.

[0021] 4. By setting a distance sensor, this utility model can measure the distance between the clamping plate and the distance sensor in real time and accurately. Based on this distance data, it can effectively help judge the clamping state of the opening and closing clamping mechanism on the stamping workpiece, accurately identify whether there is insufficient clamping causing the stamping workpiece to loosen, or excessive clamping causing damage to the stamping workpiece, thereby ensuring the stability of the stamping production process and the quality of the stamping workpiece. Attached Figure Description

[0022] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0025] Figure 3 for Figure 1 A magnified view of a portion of point B in the middle;

[0026] Figure 4 This is a schematic diagram of the structure of the present invention, showing the assembly of two platform bodies;

[0027] Figure 5 This is a top view of the assembly of the two platform bodies of this utility model.

[0028] Reference numerals in the attached drawings: 1-Fixed frame, 2-Platform body, 3-Auxiliary positioning and turnover platform, 4-Moving module, 5-Claw platform, 6-Base plate, 7-First drive cylinder, 8-Linkage bracket, 9-Linkage rod, 10-Second drive cylinder, 11-Support platform, 12-Third drive cylinder, 13-Connecting plate, 14-Clamping seat, 15-Clamping piece, 16-Screw, 17-Pressure block, 18-Nut, 19-Bracket, 20-Distance sensor. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] Example:

[0031] See Figures 1-5 This utility model provides a transfer platform integrated into a stamping die, including an X-axis translation mechanism, a fixed frame 1, and at least one platform body 2. Auxiliary positioning and turnover platforms 3 are provided at both the front and rear ends of the platform body 2, respectively mounted on the X-axis translation mechanism and the fixed frame 1. Moving modules 4 are symmetrically slidably arranged on both sides of the platform body 2. Both moving modules 4 are connected to the X-axis translation mechanism and can translate along the X-axis direction under the action of the X-axis translation mechanism. A Z-axis lifting mechanism is provided on the moving module 4, and a Y-axis translation mechanism is provided at the movable end of the Z-axis lifting mechanism. A jaw platform 5 is provided at the movable end of the Y-axis translation mechanism. Three sets of opening and closing clamping mechanisms are arranged parallel to each other along the X-axis direction on the jaw platform 5, which can transfer the stamped workpiece along the direction of the front auxiliary positioning and turnover platform 3, the platform body 2, and the rear auxiliary positioning and turnover platform 3.

[0032] Taking a single platform body 2 as an example, this invention constructs a transfer platform that can be installed inside a stamping die by setting up an X-axis translation mechanism, a fixing frame 1, and the platform body 2. This enables the entire transfer process to operate automatically within the stamping die, solving the problem of high manual labor requirements in traditional methods. Its specific working principle is as follows:

[0033] The auxiliary positioning and turnover platforms 3 at both ends are respectively installed on the X-axis translation mechanism and the fixed frame 1. Their layout clearly defines the starting and ending positions of the stamped workpiece transfer within the stamping die, providing a spatial positioning reference for the stamped workpiece transfer process. Specifically, the opening and closing clamping mechanisms configured on the jaw platforms 5 on both sides of the platform body 2 can clamp the stamped workpiece through pairwise cooperation. By installing the jaw platforms 5 on the movable end of the Y-axis translation mechanism, the jaw platforms 5 can move flexibly in the Y-axis direction with the drive of the Y-axis translation mechanism, thereby adjusting the spacing of the opening and closing clamping mechanisms on both sides, thus effectively adapting to stamped workpieces of different sizes and specifications, and enhancing the compatibility of the transfer platform with diverse workpieces. The Y-axis translation mechanism is installed on the Z-axis lifting mechanism. Under the action of the Z-axis lifting mechanism, the Y-axis translation mechanism can move up and down along the Z-axis direction, thereby adjusting the height of the stamped workpiece on the jaw platform 5 to meet the height requirements of stamped workpieces in different production stages. The Z-axis lifting mechanism is mounted on the sliding modules 4 on both sides of the platform body 2. Both sliding modules 4 are connected to the X-axis translation mechanism. Driven by the X-axis translation mechanism, the sliding modules 4 can smoothly translate along the X-axis, thereby moving the chuck platform 5 and the stamped workpiece on it in the X-axis direction, ensuring that the stamped workpiece can be transferred according to the preset production path. In actual operation, the operator first places the stamped workpiece onto the front auxiliary positioning and turnover platform 3. Subsequently, with the cooperation of the X-axis translation mechanism, the Y-axis translation mechanism, and the Z-axis lifting mechanism, the first set of opening and closing clamping mechanisms on the chuck platform 5 precisely moves to the corresponding position and height of the front auxiliary positioning and turnover platform 3. The distance between the opening and closing clamping mechanisms on both sides is adjusted by the Y-axis translation mechanism to achieve stable clamping of the stamped workpiece. Next, the Z-axis lifting mechanism is activated, lifting the stamped workpiece to a certain height, causing it to detach from the front auxiliary positioning and turnover platform 3. Then, the X-axis translation mechanism is activated, smoothly moving the stamped workpiece towards the subsequent production stage. When the stamping workpiece arrives at the stamping station on platform body 2, the Z-axis lifting mechanism lowers the height of the workpiece, while the two side opening and closing clamping mechanisms move away from each other, accurately placing the workpiece on platform body 2 for the first stamping process. After the first stamping process is completed, the second set of opening and closing clamping mechanisms on the chuck platform 5 moves to the location of the workpiece, clamps it again, and lifts it up. Using the X-axis translation mechanism, it continues to move towards the next stage until it reaches the next stamping station. Upon arrival, the workpiece is lowered and the two side opening and closing clamping mechanisms separate, allowing the second stamping process to begin. Simultaneously, the first set of opening and closing clamping mechanisms returns to the position of the front auxiliary positioning and turnover platform 3, repeating the workpiece transfer operation according to the above process, and then performing the first stamping process for another workpiece.Finally, after the stamped workpiece completes the second stamping process, the third set of opening and closing clamping mechanisms on the chuck platform 5 moves to the position of the stamped workpiece, clamps it again, and lifts it. Using the X-axis translation mechanism, it continues to move backward until it reaches the auxiliary positioning and transfer platform 3 at the rear end. By lowering the height and releasing the clamp on the stamped workpiece, the finished stamped workpiece is placed on the rear auxiliary positioning and transfer platform 3, allowing the operator to easily remove it. During this production process, the first and second sets of opening and closing clamping mechanisms synchronously return to their previous positions, and then, according to the established process, repeat the transfer and stamping processes for other stamped workpieces. Compared to the traditional stamping production process that requires multiple people to work together, this transfer platform automates the transfer of stamped workpieces in intermediate processes. It eliminates the need for a large number of people to handle and hand over workpieces between processes, reducing labor costs. Furthermore, its periodic operation ensures the continuity and stability of the production process, effectively improving production efficiency, reducing the workload of operators, lowering the possibility of operational errors due to fatigue, and thus reducing the risk of safety accidents. Furthermore, this transfer platform is designed for flexible expansion; the number of platform bodies 2 can be increased or decreased according to actual production needs. Auxiliary positioning and transfer platforms 3 are also provided between adjacent platform bodies 2 to ensure the transfer of stamped workpieces between different platform bodies 2. Simultaneously, the sliding modules on the same side of adjacent platform bodies 2 adopt a linkage design, enabling synchronous operation and ensuring the efficient and smooth progress of the entire production process. (See reference.) Figure 4 and Figure 5 Under this design, the number of platform bodies 2 and the number of stamping processes have a clear correspondence. That is, one platform body 2 corresponds to two stamping processes. When the number of platform bodies 2 increases to two, it can correspond to four stamping processes, and so on. This takes into account both the flexibility and efficiency of production and has high practicality.

[0034] In one specific implementation, see Figure 1 The X-axis translation mechanism includes a base plate 6, a first drive cylinder 7, and a linkage bracket 8. The first drive cylinder 7 and the auxiliary positioning and turnover platform 3 are both fixedly installed on the base plate 6. The linkage bracket 8 is slidably installed on the base plate 6. The output end of the first drive cylinder 7 is connected to the linkage bracket 8. The two ends of the linkage bracket 8 are respectively provided with linkage rods 9, and the linkage rods 9 are respectively connected to the moving module 4 on the adjacent side.

[0035] Both the first drive cylinder 7 and the auxiliary positioning and turnover platform 3 are firmly fixed on the base plate 6, while the linkage bracket 8 is slidably mounted on the base plate 6 and can slide linearly along the base plate 6. When the first drive cylinder 7 is activated, the extension and retraction of its output end can drive the linkage bracket 8 to perform reciprocating linear motion on the base plate 6. Linkage rods 9 are respectively provided at both ends of the linkage bracket 8, and the linkage rods 9 are respectively connected to the moving module 4 on the adjacent side. In this way, the movement of the linkage bracket 8 can drive the moving module 4 to move synchronously through the linkage rods 9, thereby realizing the translation function in the X-axis direction. The structure is simple and the transmission is stable, effectively ensuring the accurate positioning and smooth operation of the equipment in the X-axis direction.

[0036] In one specific implementation, see Figure 2 The Z-axis lifting mechanism includes a second drive cylinder 10, which is mounted on the moving module 4, and the Y-axis translation mechanism is mounted on the output end of the second drive cylinder 10.

[0037] The Z-axis lifting mechanism uses the second drive cylinder 10 as the driving component. The second drive cylinder 10 is directly mounted on the moving module 4, with a compact and reasonable layout. The Y-axis translation mechanism is installed at the output end of the second drive cylinder 10. When the second drive cylinder 10 is started, its output end drives the Y-axis translation mechanism to achieve stable lifting and lowering motion, thereby realizing flexible adjustment of the height of the stamped workpiece.

[0038] In one specific implementation, see Figure 2 The Y-axis translation mechanism includes a support platform 11 and a third drive cylinder 12. The support platform 11 is installed at the output end of the second drive cylinder 10, and the claw platform 5 is installed at the output end of the third drive cylinder 12 and slidably installed on the support platform 11.

[0039] The support platform 11 is installed at the output end of the second drive cylinder 10. With the lifting action of the second drive cylinder 10, the support platform 11 can be height adjusted in the Z-axis direction, providing a suitable base height for subsequent operations. The chuck platform 5 is installed at the output end of the third drive cylinder 12 and is slidably fitted onto the support platform 11. When the third drive cylinder 12 is activated, its output end will extend and retract according to a preset stroke and direction, thereby driving the chuck platform 5 to slide linearly along the Y-axis on the support platform 11. The opening and closing clamping mechanisms on the chuck platform 5 can move closer or further apart according to production needs, completing the clamping and placement of stamped workpieces, effectively ensuring the accuracy of workpiece positioning and the smoothness of the operation process throughout the stamping production process.

[0040] In one specific implementation, see Figure 3The opening and closing clamping mechanism includes a connecting plate 13, a clamping seat 14, a clamping plate 15, a pressure head, and a return spring. One end of the connecting plate 13 is connected to the jaw platform 5, and the other end is connected to the clamping seat 14. The clamping plate 15 is hinged to the clamping seat 14. The pressure head and the return spring are respectively installed on both sides of the clamping plate 15. The return spring is connected to the clamping seat 14, which can keep the pressure head moving towards the clamping seat 14.

[0041] The opening and closing clamping mechanism, through the coordinated operation of the connecting plate 13, clamping seat 14, clamping plate 15, pressure head, and return spring, effectively ensures the stability of clamping the stamped workpiece. Specifically, one end of the connecting plate 13 is firmly connected to the jaw platform 5, and the other end is connected to the clamping seat 14, providing basic support for the entire mechanism. The clamping plate 15 is hinged to the clamping seat 14 and can rotate flexibly around the hinge point. The pressure head and return spring are respectively located on both sides of the clamping plate 15. The return spring is connected to the clamping seat 14. Under the action of the return spring, the pressure head always maintains a tendency to move towards the clamping seat 14, so that when the opening and closing clamping mechanism clamps the stamped workpiece, it can achieve adaptive and stable clamping based on the actual thickness of the stamped workpiece through the cooperation between the pressure head and the clamping seat 14. When it is necessary to release the workpiece, the opening and closing clamping mechanisms on both sides separate, and the stamped workpiece is released. At the same time, the clamping plate 15 can quickly return to its original position with the help of the return spring. The operation is simple and can effectively ensure the reliability of the clamping and placement actions.

[0042] In one specific implementation, see Figure 3 The pressure head includes a screw 16 and a clamping block 17. The screw 16 passes through the clamping plate 15 and nuts 18 are threaded on both sides of the clamping plate 15. The clamping block 17 is threaded to one end of the screw 16 located in the clamping seat 14.

[0043] The pressure head adopts an assembly-type structure design, with a screw 16 passing through the clamping plate 15 and secured by nuts 18 on both sides for stable installation. The clamping block 17 is threadedly connected to one end of the screw 16 located in the clamping seat 14, i.e., the lower end. In practical applications, operators can flexibly adjust the distance between the clamping block 17 and the clamping seat 14 by adjusting the extension length of the screw 16 and rotating the clamping block 17, thus quickly adapting to stamping workpieces of different thicknesses and ensuring a stable and reliable clamping effect during the clamping process. Furthermore, this assembly-type design facilitates disassembly and assembly, greatly simplifying subsequent equipment replacement and maintenance.

[0044] In one specific implementation, see Figure 3 The clamping seat 14 has a bracket 19 on one side of the return spring, and a distance sensor 20 is provided at the bottom of the bracket 19. The distance sensor 20 is located above the clamping plate 15.

[0045] A bracket 19 with a distance sensor 20 is provided on one side of the return spring of the clamping seat 14, and the distance sensor 20 is located above the clamping plate 15, which can measure the distance between the clamping plate 15 and the distance sensor 20 in real time and accurately. Based on this distance data, the clamping status of the opening and closing clamping mechanism on the stamped workpiece can be effectively judged, and the situation of insufficient clamping causing the stamped workpiece to loosen or excessive clamping causing damage to the stamped workpiece can be accurately identified, thereby ensuring the stability of the stamping production process and the quality of the stamped workpiece.

[0046] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A transfer platform integrated within a stamping die, characterized by, The utility model provides a kind of stamping workpiece transfer device, including X axis translation mechanism, fixed frame (1) and at least one platform body (2), the front and rear ends of the platform body (2) are equipped with auxiliary positioning turnover platform (3), the auxiliary positioning turnover platform (3) of front and rear ends is respectively mounted on X axis translation mechanism and fixed frame (1), the two sides of the platform body (2) are symmetrically slidably provided with mobile module (4), the two sides The mobile module (4) is connected with X axis translation mechanism, and can be translated along X axis direction under the action of X axis translation mechanism, Z axis lifting mechanism is equipped on the mobile module (4), the movable end of Z axis lifting mechanism is equipped with Y axis translation mechanism, the movable end of Y axis translation mechanism is equipped with jaw platform (5), three groups of open-close clamping mechanisms are arranged in parallel along X axis direction on the jaw platform (5), and stamping workpiece can be transferred along the direction of front end The auxiliary positioning turnover platform (3), the platform body (2) and rear end auxiliary positioning turnover platform (3).

2. The transfer platform integrated in a press die according to claim 1, wherein, The X axis translation mechanism includes a bottom plate (6), a first drive cylinder (7) and a linkage bracket (8), the first drive cylinder (7) and the auxiliary positioning turnover platform (3) are both fixedly installed on the bottom plate (6), the linkage bracket (8) is slidably installed on the bottom plate (6), the output end of the first drive cylinder (7) is connected to the linkage bracket (8), and the linkage bracket (8) has linkage rods (9) at both ends, and the linkage rods (9) are respectively connected to the mobile modules (4) on the same side.

3. The transfer platform integrated in a stamping die according to claim 1, wherein, The Z axis lifting mechanism includes a second drive cylinder (10), and the second drive cylinder (10) is installed on the mobile module (4).

4. The transfer platform integrated in a press die according to claim 3, wherein, The Y axis translation mechanism includes a support platform (11) and a third drive cylinder (12), the support platform (11) is installed on the output end of the second drive cylinder (10), and the jaw platform (5) is installed on the output end of the third drive cylinder (12) and slidably installed on the support platform (11).

5. A transfer platform integrated in a stamping die according to any one of claims 1-4, characterized in that, The open-close clamping mechanism includes a connecting plate (13), a clamping seat (14), a clamping piece (15), a pressing head and a return spring, one end of the connecting plate (13) is connected to the jaw platform (5), the other end is connected to the clamping seat (14), the clamping piece (15) is hingedly installed on the clamping seat (14), the pressing head and the return spring are installed on both sides of the clamping piece (15), and the return spring is connected to the clamping seat (14) to make the pressing head keep moving towards the clamping seat (14).

6. The transfer platform integrated in a press die according to claim 5, wherein, The pressing head includes a screw rod (16) and a pressing block (17), the screw rod (16) penetrates through the clamping piece (15) and is threadedly installed with a nut (18) on both sides of the clamping piece (15), and the pressing block (17) is threadedly connected to one end of the screw rod (16) located on the clamping seat (14).

7. The transfer platform integrated in a press die according to claim 5, wherein, The clamping seat (14) is provided with a bracket (19) on one side of the return spring, the bracket (19) is provided with a distance measuring sensor (20) at the bottom, and the distance measuring sensor (20) is located above the clamping piece (15).

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