A scribing device with a quickly replaceable scribing template

Abstract

The utility model discloses a lineation device of quick replacement lineation template relates to lineation equipment technical field, it includes first side plate, backrest, second side plate, transverse movement subassembly, fore-and-aft movement subassembly, hydraulic device, lineation pen and template seat, first side plate is fixed with backrest, and transverse movement subassembly is located first side plate interval and links second side plate, fore-and-aft movement subassembly is located second side plate interval and links hydraulic device, and lineation pen is installed on hydraulic device, and template seat places lineation template, and transverse movement subassembly contains drive motor, transmission screw rod and screw rod nut, fore-and-aft movement subassembly contains drive motor, transmission screw rod, screw rod nut, limit sliding block and slide rail, lineation template is equipped with guide sliding block and elastic clamp block, and template seat sets up corresponding sliding slot, clamping groove and limit seat, and template seat bottom has silica gel antiskid pad. This device template replaces fast, and the connection is stable, and transmission is accurate, can high -efficient accurate completion lineation operation.

Description

Technical Field

[0001] This utility model relates to the field of marking device technology, specifically to a marking device that can quickly change marking templates. Background Technology

[0002] In many fields such as machining and mold manufacturing, scribing is a fundamental and crucial process, and its accuracy and efficiency directly affect the quality and progress of subsequent processing.

[0003] Currently, the process of changing the scribing template in common scribing devices is quite cumbersome when performing different scribing operations. It usually requires the use of multiple tools and takes a lot of time to disassemble and install the template, which seriously affects the overall efficiency of scribing. Especially in scenarios where templates need to be changed frequently to perform multiple scribing tasks, this inefficient template changing method has become an important factor restricting the improvement of production efficiency.

[0004] Meanwhile, existing marking devices suffer from insufficient connection stability in the connection and fixation between the template and the template base. Some devices use simple clips or bolts for connection. Clips are prone to loosening due to vibration and other factors during use, while bolt connections require repeated tightening, which is not only cumbersome to operate, but also prone to stripping after long-term use. This results in the template not being securely fixed, which in turn affects the accuracy of the marking and causes deviations in the marked lines, failing to meet the requirements of high-precision processing.

[0005] Therefore, it is necessary to design a marking device that can quickly change marking templates to solve the problems mentioned above. Utility Model Content

[0006] The present invention aims to solve the problems of cumbersome template replacement, insufficient connection stability and low transmission accuracy of existing marking devices, and to provide a marking device that can quickly replace marking templates, has a stable connection and high marking accuracy.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A scribing device with a quick-change scribing template includes a first side plate, a back plate, a second side plate, a lateral movement assembly, a front-back movement assembly, a hydraulic device, a scribing pen, and a template base. The first side plate is fixedly connected to the back plate. The lateral movement assembly is disposed between the first side plates. The second side plate is connected to the lateral movement assembly. The front-back movement assembly is disposed between the second side plates. The hydraulic device is connected to the front-back movement assembly. The scribing pen is mounted on the hydraulic device and is used to drive the scribing pen to move closer to or away from the workpiece on the template base. The template base is used to hold the scribing template.

[0009] Furthermore, the lateral movement component includes a lateral drive motor, a lateral transmission screw, and a lateral screw nut. The lateral drive motor is connected to the lateral transmission screw, the lateral screw nut is threadedly engaged with the lateral transmission screw, and the lateral screw nut is fixedly connected to the second side plate to drive the second side plate and related components to move laterally.

[0010] Furthermore, the forward and backward moving assembly includes a front and rear drive motor, a front and rear transmission screw, a front and rear screw nut, a limiting slider, and a limiting slide rail. The front and rear drive motors are connected to the front and rear transmission screws, the front and rear screw nuts are threadedly engaged with the front and rear transmission screws, the limiting slider is fixedly connected to the front and rear screw nuts and slidably engaged with the limiting slide rail, the limiting slide rail is set on the second side plate, and the hydraulic device is connected to the front and rear screw nuts to realize the forward and backward movement of the hydraulic device and the marking pen.

[0011] Furthermore, the scribing template is provided with a guide slider and an elastic block. The guide slider slides in cooperation with the guide groove of the template base, and the elastic block engages with the engagement groove of the template base, so as to realize the quick connection between the scribing template and the template base.

[0012] Furthermore, the template base is provided with a guide groove, a locking groove, and a limiting seat. The guide groove is used to cooperate with the guide slider on the marking template, the locking groove is used to engage with the elastic locking block on the marking template, and the limiting seat is used to limit the marking template to ensure the accuracy of the template installation position.

[0013] Furthermore, the elastic locking block is made of elastic rubber material and has an anti-slip texture on its surface to enhance the stability and friction of the locking and prevent the template from loosening.

[0014] Furthermore, the bottom of the template base is provided with an anti-slip pad. The anti-slip pad is made of silicone and has a wavy texture on the bottom to enhance the stability of the template base when it is placed and reduce shaking when the device is running.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model, through a marking device that allows for quick replacement of marking templates, achieves the following effects: 1. By setting guide sliders and elastic blocks on the marking template, and corresponding guide grooves and engaging grooves on the template base, the marking template can quickly achieve sliding engagement and locking fixation with the template base without the need for additional tools, greatly shortening the template replacement time and significantly improving the overall efficiency of marking operations, especially suitable for work scenarios requiring frequent template replacement; 2. Utilizing the engaging action of the elastic blocks and engaging grooves, combined with the cooperation of the guide sliders and guide grooves, provides double fixing protection for the marking template. The elastic blocks are made of elastic rubber material with anti-slip textures on the surface, enhancing the stability and friction of the engagement, effectively preventing the template from shifting or loosening due to vibration or other factors during the marking process, ensuring the accuracy of the marking, and meeting the requirements of high-precision processing; 3. The lateral movement component adopts a transmission method of lateral drive motor, lateral transmission screw, and lateral screw nut, while the front-back movement component adopts a transmission method of front-back drive motor, front-back transmission screw, front-back screw nut, limit slider, and limit rail. The lead screw and nut drive features high transmission accuracy and small backlash. Combined with the sliding limit slider and limit rail, it enables the moving component to precisely drive the scribing pen to the predetermined position, effectively avoiding accuracy degradation caused by transmission wear, improving scribing accuracy, and providing a reliable scribing foundation for subsequent processing. 4. The bottom of the template base is equipped with a silicone anti-slip pad with a wavy texture, increasing the friction between the template base and the placement surface, enhancing the stability of the device during placement, and reducing shaking caused by vibration and other factors during operation, further ensuring the smooth progress and accuracy of the scribing operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure of the lateral moving component, the front-back moving component, the hydraulic device, and the marking pen of this utility model.

[0019] Figure 3 This utility model Figure 1 A schematic diagram of the side view structure;

[0020] Figure 4 This is a schematic diagram of the structure of the marking template and template base after separation.

[0021] In the diagram: 1. First side plate; 2. Backing plate; 3. Second side plate; 4. Lateral movement assembly; 5. Forward and backward movement assembly; 6. Hydraulic device; 7. Marking pen; 8. Template seat; 9. Marking template; 41. Lateral drive motor; 42. Lateral transmission screw; 43. Lateral screw nut; 51. Forward and backward drive motor; 52. Forward and backward transmission screw; 53. Forward and backward screw nut; 54. Limiting slider; 55. Limiting slide rail; 81. Guide groove; 82. Engaging groove; 83. Limiting seat; 91. Guide slider; 92. Elastic locking block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0024] Example 1

[0025] Please see Figure 1This embodiment provides a marking device with a quick-change marking template. The marking device includes a first side plate 1, a back plate 2, a second side plate 3, a lateral movement component 4, a front-back movement component 5, a hydraulic device 6, a marking pen 7, and a template base 8. Two first side plates 1 are symmetrically distributed on both sides of the back plate 2 and are fixedly connected to the back plate 2 by welding to form the basic support frame of the device. The thickness of the back plate 2 is not less than the thickness of the first side plate 1 to ensure overall support strength. The lateral movement component 4 is horizontally positioned between the two first side plates 1, with its two ends connected to the inner sidewall of the first side plate 1 via bearing seats to ensure stable rotation. Two second side plates 3 are also provided, fixedly connected to the output ends on both sides of the lateral movement component 4, and move laterally synchronously with the lateral movement component 4. The front-back movement component 5 is horizontally positioned between the two first side plates 1. Between the two side plates 3, its installation direction is perpendicular to the transverse moving component 4, and both ends are connected to the inner side wall of the second side plate 3 through bearing seats; the top of the hydraulic device 6 is fixedly connected to the output end of the front and rear moving component 5, and can move back and forth synchronously with the front and rear moving component 5; the scribing pen 7 is installed at the bottom output end of the hydraulic device 6 through a detachable clamp, and the hydraulic device 6 drives the scribing pen 7 to approach or move away from the workpiece on the template seat 8 through the extension and retraction of the hydraulic rod. The template seat 8 is placed on the working platform below the device to support the workpiece to be scribed and the scribing template 9. Its table area is not less than the maximum placement area of ​​common workpieces to ensure that the workpiece is placed stably.

[0026] Example 2

[0027] Please see Figure 2 Based on Embodiment 1, this embodiment further defines the lateral movement component 4 as including a lateral drive motor 41, a lateral transmission screw 42, and a lateral screw nut 43. The lateral drive motor 41 is a servo motor, and its output shaft is fixedly connected to one end of the lateral transmission screw 42 via a coupling, which can drive the lateral transmission screw 42 to rotate synchronously. The other end of the lateral transmission screw 42 is connected to a bearing seat inside the first side plate 1 via a deep groove ball bearing. The bearing seat is provided with a dustproof sealing ring to prevent dust from entering and affecting the transmission accuracy. The lateral screw nut 43 is sleeved on the outside of the lateral transmission screw 42, and the two are connected by a trapezoidal thread. The trapezoidal thread has a tooth angle of 30°, which can reduce wear during transmission. The outer wall of the transverse screw nut 43 is fixedly connected to the inner wall of the second side plate 3 by bolts, and the connection part is provided with a positioning pin to ensure that there is no relative displacement between the transverse screw nut 43 and the second side plate 3. When the transverse drive motor 41 starts, the transverse transmission screw 42 rotates, and through the threaded engagement, it drives the transverse screw nut 43 to move axially along the transverse transmission screw 42, thereby driving the second side plate 3 and the subsequent connected front and rear moving components 5, hydraulic device 6, and marking pen 7 to move synchronously in the transverse direction, realizing the position adjustment of the marking pen 7 in the transverse direction.

[0028] Example 3

[0029] Please see Figure 3 This embodiment, based on embodiment 1, further defines the forward and backward moving assembly 5 as including a forward and backward drive motor 51, a forward and backward transmission screw 52, ​​a forward and backward screw nut 53, a limiting slider 54, and a limiting slide rail 55. The forward and backward drive motor 51 is also a servo motor, and its output shaft is fixedly connected to one end of the forward and backward transmission screw 52 through a coupling. The other end of the forward and backward transmission screw 52 is connected to the bearing seat on the inner side of the second side plate 3 through a thrust ball bearing, which can withstand the axial force during the scribing process. The forward and backward screw nut 53 is sleeved on the outside of the forward and backward transmission screw 52 and connected by a rectangular thread. The transmission efficiency of the rectangular thread is higher than that of the trapezoidal thread, which can reduce the load on the drive motor. The bottom of the forward and backward screw nut 53 is fixedly connected to the top of the limiting slider 54 by bolts. The limiting slider 54 has a "T" shaped cross section. The limiting slide rail 55 is fixed to the inner side wall of the second side plate 3 by bolts. Its cross section is a "T" shaped groove that matches the limiting slider 54. The limiting slider 54 is embedded in the groove of the limiting slide rail 55, and the two slide in cooperation. The clearance between the parts is no more than 0.05mm to ensure smooth and uninterrupted sliding. The top of the hydraulic device 6 is fixedly connected to the bottom of the front and rear lead screw nuts 53 via a flange. When the front and rear drive motors 51 are started, the front and rear transmission lead screws 52 rotate, driving the front and rear lead screw nuts 53 to move axially. At the same time, the limit slider 54 slides along the limit slide rail 55 to provide guidance and limit for the front and rear lead screw nuts 53, preventing them from rotating synchronously with the front and rear transmission lead screws 52. Finally, the hydraulic device 6 and the marking pen 7 move stably in the front and rear directions.

[0030] Example 4

[0031] Please see Figure 1 as well as Figure 4This embodiment, based on embodiment 1, further defines the marking template 9 as a rectangular plate structure, made of 45# steel, with a surface hardened to HRC40-45 for enhanced wear resistance. Two guide sliders 91 are symmetrically fixed to the two sides of the bottom edge of the marking template 9, with a convex cross-section and a length consistent with the width of the marking template 9. The top of the guide sliders 91 is welded to the bottom of the marking template 9 and then ground smooth to ensure a flat surface. Two elastic blocks 92 are located in the middle of the bottom of the marking template 9, symmetrically distributed along its length. The top of the elastic blocks 92 is bolted to the bottom of the marking template 9, with a rounded bottom for easy engagement with the locking groove 82. The template base 8... The platform has a guide groove 81 corresponding to the guide slider 91. The cross-section of the guide groove 81 is concave, matching the guide slider 91. The inner wall of the groove is polished, with a surface roughness Ra≤0.8μm, reducing the friction when the guide slider 91 slides. The platform of the template base 8 has a locking groove 82 corresponding to the elastic locking block 92. The cross-section of the locking groove 82 is semi-circular, and the diameter is the same as the diameter of the bottom arc of the elastic locking block 92. When installing the scribing template 9, the guide slider 91 is aligned with the guide groove 81 and inserted. The scribing template 9 is pushed along the groove until the elastic locking block 92 is engaged in the locking groove 82, achieving quick fixation of the scribing template 9. When disassembling, the scribing template 9 is pulled upward. The elastic locking block 92 is deformed by external force and disengages from the locking groove 82. The template can then be removed along the guide groove 81 without the need for tools.

[0032] Example 5

[0033] Please see Figure 4Based on Example 1, this embodiment further specifies that the template base 8 is made of cast iron, and the surface is subjected to aging treatment to eliminate internal stress and prevent deformation after long-term use. The guide grooves 81 are opened on both sides of the template base 8, and the two grooves are set in parallel. The spacing is the same as the spacing of the guide sliders 91 at the bottom of the scribing template 9. The depth of the groove is 1.2 times the height of the guide sliders 91 to ensure that the guide sliders 91 are completely embedded in the grooves without shaking. The locking grooves 82 are opened in the middle area of ​​the template base 8. The spacing between the two locking grooves 82 is 1 / 2 of the length of the scribing template 9, and the groove depth is 1 / 2 of the height of the elastic locking block 92, which ensures both stable locking and easy disassembly. The limiting seat 83 is located at one end of the template base 8 platform and is a rectangular block structure. It is fixedly connected to the template base 8 platform by bolts. The inner wall of the limiting seat 83 fits against the end of the scribing template 9. When the scribing template 9 is pushed along the guide groove 81 to contact the limiting seat 83, the elastic locking block 92 is precisely aligned with the locking groove 82, which plays a positioning role and prevents the scribing template 9 from shifting its installation position. At the same time, a rubber buffer pad with a thickness of 2mm is pasted on the inner wall of the limiting seat 83. When the end of the scribing template 9 contacts the limiting seat 83, it can buffer the impact force and prevent wear between the template and the limiting seat 83.

[0034] Example 6

[0035] Please see Figure 4 This embodiment, based on Embodiment 1, further specifies that the elastic locking block 92 is made of nitrile rubber. Nitrile rubber has good elasticity and wear resistance, and excellent oil resistance, making it suitable for use in industrial environments. The Shore hardness of the elastic locking block 92 is 60±5HA, ensuring sufficient elasticity for easy locking and disassembly, while also providing a certain degree of rigidity to prevent deformation over long-term use. The bottom arc surface of the elastic locking block 92 is provided with anti-slip texture, which is diagonally crisscrossed at an angle of 45°, with a texture depth of 0.5mm and a width of 1mm. The anti-slip texture increases the friction between the elastic locking block 92 and the inner wall of the locking groove 82, preventing the elastic locking block 92 from disengaging from the locking groove 82 due to vibration during the marking process of the marking template 9, further improving the stability of the template fixation. In addition, the connection between the top of the elastic locking block 92 and the bottom of the marking template 9 is provided with reinforcing ribs. The reinforcing ribs are triangular in shape and half the thickness of the elastic locking block 92, which can enhance the bending resistance of the elastic locking block 92 and prevent the elastic locking block 92 from breaking due to long-term insertion and removal.

[0036] Example 7

[0037] Please see Figure 1Based on Example 1, this embodiment further specifies that the anti-slip pad at the bottom of the template base 8 is made of food-grade silicone. Silicone has good anti-slip and aging resistance properties, and is non-toxic and odorless, making it suitable for use in various working environments. The anti-slip pad is 5mm thick and is fixedly connected to the bottom of the template base 8 with double-sided adhesive. The double-sided adhesive is a high-strength acrylic adhesive with a bonding strength ≥10N / cm. 2 To ensure the anti-slip mat remains in place for long-term use, the bottom of the mat features a wavy pattern with a wavelength of 20mm and a wave height of 2mm, distributed along the length of the template base 8. This wavy pattern increases the contact area between the mat and the work platform surface, creating multiple independent anti-slip units. Even with slight oil or dust on the work platform surface, it maintains a good anti-slip effect. Furthermore, the mat's edges are chamfered at a 45° angle with a 3mm width to prevent the edges from curling up due to impacts, thus extending the mat's lifespan.

[0038] The working process of this utility model is as follows: When using this scribing device with quick-change scribing templates, align the guide slider 91 at the bottom of the scribing template 9 with the guide groove 81 on the surface of the template base 8, and push the scribing template 9 along the groove until the end of the scribing template 9 contacts the limiting seat 83 of the template base 8; at this time, the elastic locking block 92 at the bottom of the scribing template 9 is precisely locked into the locking groove 82 of the template base 8, completing the quick fixing of the scribing template 9 without the need for additional tools. Place the workpiece to be scribed on the scribing template 9 of the template base 8, adjust the position of the workpiece according to the scribing requirements, and ensure that the scribing area of ​​the workpiece is aligned with the scribing trajectory of the scribing template 9; the anti-slip pad at the bottom of the template base 8 increases the friction with the work platform through the wavy texture, preventing the template base 8 from shifting during workpiece placement and subsequent scribing.

[0039] The lateral drive motor 41 of the lateral movement assembly 4 is activated, which drives the lateral transmission screw 42 to rotate. Through the threaded engagement between the lateral transmission screw 42 and the lateral screw nut 43, the lateral screw nut 43 is moved axially along the lateral transmission screw 42. Since the lateral screw nut 43 is fixedly connected to the second side plate 3, it drives the second side plate 3, the front and rear movement assembly 5, the hydraulic device 6, and the marking pen 7 to move laterally synchronously until the marking pen 7 moves to the preset marking starting position in the lateral direction, at which point the front and rear movement assembly is activated. The front and rear drive motors 51 drive the front and rear transmission screws 52 to rotate. Through the threaded engagement between the front and rear transmission screws 52 and the front and rear screw nuts 53, the front and rear screw nuts 53 are moved axially along the front and rear transmission screws 52. The limiting sliders 54 at the bottom of the front and rear screw nuts 53 slide along the limiting slide rails 55 on the second side plate 3, providing guidance and limiting for the front and rear screw nuts 53 to prevent them from rotating synchronously with the front and rear transmission screws 52. At the same time, the front and rear screw nuts 53 drive the hydraulic device 6 and the marking pen 7 to move synchronously back and forth. Until the marking pen 7 moves to the preset marking starting position in the front-back direction, the hydraulic device 6 is activated. The hydraulic device 6 drives the marking pen 7 downward through the extension and retraction of the hydraulic rod, so that the marking pen 7 contacts the surface of the workpiece to be marked. According to the marking trajectory requirements, the horizontal drive motor 41 and the front-back drive motor 51 are activated again. Through the coordinated action of the horizontal movement component 4 and the front-back movement component 5, the marking pen 7 is driven to move along the preset trajectory of the marking template 9 to complete the marking operation of the workpiece. During the marking process, the anti-slip texture on the surface of the elastic block 92 is enhanced. The friction between the scriber and the locking groove 82 prevents the scriber template 9 from shifting and affecting the scriber accuracy. After the scriber is finished, the hydraulic device 6 is activated to reset the scriber pen 7 upwards, and the horizontal drive motor 41 and the front and rear drive motors 51 are turned off. The scriber workpiece is removed from the template seat 8. If it is necessary to replace the scriber template 9 for scriber of different trajectories, pull the scriber template 9 upwards. The elastic locking block 92 is deformed by external force and disengages from the locking groove 82. The old scriber template 9 is taken out along the guide slide 81. Repeat step 1 to install the new scriber template 9, and then proceed to the next round of scriber operation.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A marking device with a quick-change marking template, characterized in that: The assembly includes a first side plate (1), a back plate (2), a second side plate (3), a lateral movement assembly (4), a front-back movement assembly (5), a hydraulic device (6), a marking pen (7), and a template seat (8). The first side plate (1) is fixedly connected to the back plate (2). The lateral movement assembly (4) is disposed between the first side plates (1). The second side plate (3) is connected to the lateral movement assembly (4). The front-back movement assembly (5) is disposed between the second side plates (3). The hydraulic device (6) is connected to the front-back movement assembly (5). The marking pen (7) is mounted on the hydraulic device (6) and is used to drive the marking pen (7) to move closer to or away from the workpiece on the template seat (8). The template seat (8) is used to place the marking template (9).

2. The marking device for quickly changing marking templates according to claim 1, characterized in that: The lateral movement assembly (4) includes a lateral drive motor (41), a lateral transmission screw (42), and a lateral screw nut (43). The lateral drive motor (41) is connected to the lateral transmission screw (42) for transmission. The lateral screw nut (43) is threadedly engaged with the lateral transmission screw (42), and the lateral screw nut (43) is fixedly connected to the second side plate (3).

3. The marking device for quickly changing marking templates according to claim 1, characterized in that: The forward and backward moving assembly (5) includes a forward and backward drive motor (51), a forward and backward transmission screw (52), a forward and backward screw nut (53), a limiting slider (54), and a limiting slide rail (55). The forward and backward drive motor (51) is connected to the forward and backward transmission screw (52) for transmission. The forward and backward screw nut (53) is threadedly engaged with the forward and backward transmission screw (52). The limiting slider (54) is fixedly connected to the forward and backward screw nut (53), and the limiting slider (54) is slidably engaged with the limiting slide rail (55). The limiting slide rail (55) is mounted on the second side plate (3). The hydraulic device (6) is connected to the forward and backward screw nut (53).

4. The marking device for quickly changing marking templates according to claim 1, characterized in that: The marking template (9) is provided with a guide slider (91) and an elastic block (92). The guide slider (91) is slidably engaged with the guide groove (81) of the template seat (8), and the elastic block (92) is engaged with the engagement groove (82) of the template seat (8).

5. A marking device for quickly changing marking templates according to claim 1, characterized in that: The template base (8) is provided with a guide groove (81), a locking groove (82) and a limiting seat (83). The guide groove (81) is used to cooperate with the guide slider (91) on the scribing template (9). The locking groove (82) is used to engage with the elastic locking block (92) on the scribing template (9). The limiting seat (83) is used to limit the scribing template (9).

6. A marking device for quickly changing marking templates according to claim 4, characterized in that: The elastic block (92) is made of elastic rubber material and has an anti-slip texture on its surface.

7. A marking device for quickly changing marking templates according to claim 5, characterized in that: The template base (8) is provided with an anti-slip pad at the bottom. The anti-slip pad is made of silicone and has a wavy pattern at the bottom to enhance the stability of the template base (8) when it is placed.

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