Needle plate for carbon felt needle punching machine

Abstract

The utility model belongs to the technical field of needling machine, disclose carbon felt needling machine needle plate, including needle plate base body, be equipped with a plurality of regular arrangement's installation site on needle plate base body, installation site is the stepped hole that penetrates needle plate base body, the upper portion of stepped hole is large diameter section, the lower part is small diameter section, every installation site is detachably installed with independent needle module on each installation site, needle module includes module body and at least one fixed needle on needle module, the upper portion of module body has the positioning boss, needle module is fixed in the stepped hole through locking piece from the bottom of needle plate base body upwards. The utility model discloses the cooperation of stepped hole and detachable needle module, can realize the independent replacement of needle unit, when partial needle is damaged, need not to disassemble entire needle plate, can directly replace corresponding module, to solve the problem of low maintenance efficiency of traditional integral structure, can improve the flexible level of production line and expand equipment process application scope in combination with multi-specification mixed loading design.

Description

Technical Field

[0001] This utility model relates to the field of acupuncture machine technology, and in particular to a needle plate for a carbon felt acupuncture machine. Background Technology

[0002] In the production process of materials such as carbon felt and carbon fiber preforms, vertical fiber bundles need to be inserted into the base material through a needle punching machine to enhance the interlayer strength and overall performance of the material. The core working component of the needle punching machine is a needle plate equipped with a large number of needles.

[0003] Most existing carbon felt needle punching machines use a one-piece structure for the needle plate, meaning that thousands of needle holes for mounting the needles are machined into a single, heavy steel plate. This traditional structure has the following problems: 1) Difficult maintenance and high cost: When a small number of needles are damaged or need to be replaced, the entire needle plate must be removed from the equipment. The replacement process is time-consuming and labor-intensive, which seriously affects production efficiency. 2) Stress concentration and easy fatigue damage: In high-speed needle punching operations, the uniformity of force distribution of the integral needle plate is poor, and stress concentration is easily generated in local areas. Long-term use may lead to micro deformation or fatigue cracks in the needle plate, affecting the needle punching accuracy and equipment life. Therefore, we proposed a carbon felt needle plate for needle punching machines. Utility Model Content

[0004] In view of the problems of difficult maintenance, high cost, stress concentration, and easy fatigue damage of the needle plate of the existing carbon felt needle punching machine, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A carbon felt needle plate for a needle punching machine includes a needle plate base. The needle plate base has multiple regularly arranged mounting positions. Each mounting position is a stepped through hole penetrating the needle plate base. The upper part of the stepped through hole is a large diameter section, and the lower part is a small diameter section. Each mounting position is detachably mounted with an independent needle module. The needle module includes a module body and at least one needle fixed to the needle module. The upper part of the module body has a positioning protrusion that cooperates with the large-diameter section.

[0006] As a technical solution for the needle plate of the carbon felt needle punching machine of this utility model, the needle module is fixed from the bottom of the needle plate base to the stepped through hole by a locking member.

[0007] As the technical solution of the carbon felt needle punching machine needle plate of this utility model, the positioning protrusion is provided with a threaded hole, the locking member is an internal hexagonal head bolt, the head of the internal hexagonal head bolt is supported on the stepped surface of the small diameter section, and the threaded end is screwed into the threaded hole.

[0008] As a technical solution for the needle plate of the carbon felt needle punching machine of this utility model, wherein: the inner wall of each of the mounting positions is provided with a positioning groove, and the positioning groove is connected to the large diameter section.

[0009] As the technical solution of the carbon felt needle punching machine needle plate of this utility model, the positioning protrusion has an integrally formed positioning flange that corresponds to the positioning groove, and the positioning flange and the positioning groove are respectively adapted to each other.

[0010] As the technical solution of the carbon felt needle punching machine needle plate of this utility model, the needle module is one of a single needle module, a double needle module or a multi-needle module, and the needle modules of different specifications can be mixed and installed on the same needle plate base.

[0011] As a technical solution for the carbon felt needle plate of the present invention, a heat dissipation gap is left between the module body and the large-diameter section.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model, through the combination of stepped through holes and detachable needle modules, enables independent replacement of the needle unit. When a local needle is damaged, there is no need to disassemble the entire needle plate; the corresponding module can be directly replaced, thus solving the problem of low maintenance efficiency of traditional integrated structures. At the same time, combined with a multi-specification mixed assembly design, it can improve the flexibility of the production line and expand the applicable range of equipment processes.

[0013] 2. This utility model, through the stress dispersion design of the locking component, the precise positioning of the positioning groove and the positioning flange through mechanical interlocking, and the synergistic effect of the heat dissipation gap thermal management, can significantly improve the cycle life of the needle plate fatigue needle punching, and at the same time improve the overall utilization rate of the equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the main structure of this utility model.

[0015] Figure 2 This is a front view schematic diagram of the single needle module separated from the needle plate substrate of this utility model.

[0016] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0017] Figure 4 This is a schematic diagram of the structure of a single needle module after separation from the needle plate substrate according to this utility model.

[0018] Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point B.

[0019] Explanation of reference numerals in the attached figures: In the diagram: 1. Needle plate base; 1011. Large diameter section; 1012. Small diameter section; 102. Positioning groove; 2. Needle module; 201. Module body; 2011. Positioning protrusion; 2012. Threaded hole; 202. Needle; 203. Positioning flange; 3. Locking component; 4. Heat dissipation gap. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Reference Figures 1-5 A carbon felt needle plate for a needle punching machine is provided. This carbon felt needle plate includes a needle plate base 1, which is made of 40Cr alloy steel and is heat-treated to a hardness of HRC28-32. The needle plate base 1 has multiple regularly arranged mounting positions. The mounting positions are stepped through holes that penetrate the needle plate base 1. The upper part of the stepped through hole is a large diameter section 1011, and the lower part is a small diameter section 1012. Each mounting position is detachably mounted with an independent needle module 2. The needle module 2 includes a module body 201 and at least one needle 202 (made of SKD61) fixed on the needle module 2. The module body 201 is made of H13 mold steel. The needle 202 is fixed to the module body 201 by high-frequency brazing. The solder is silver-based solder (melting point 650℃). After welding, the whole is quenched (HRC50-55). The upper part of the module body 201 has a positioning protrusion 2011 that cooperates with the large diameter section 1011. In application, the needle unit can be replaced independently by cooperating with the stepped through hole and the detachable needle module 2. When a local needle 202 is damaged, it is not necessary to disassemble the entire needle plate. The corresponding module can be replaced directly, which solves the problem of low maintenance efficiency of traditional integral structure.

[0022] Reference Figures 2-5The needle module 2 is fixed upward from the bottom of the needle plate base 1 into the stepped through hole via the locking member 3. The positioning protrusion 2011 has a threaded hole 2012. The locking member 3 is an internal hexagonal head bolt (M8×1.25, strength grade 12.9, preload torque of 25 N·m). The head of the internal hexagonal head bolt is supported on the stepped surface of the small diameter section 1012, and the threaded end is screwed into the threaded hole 2012. The threaded end is coated with molybdenum disulfide lubricant. In application, the bottom-up locking method is adopted to make the module more evenly stressed. At the same time, combined with the threaded connection structure of the internal hexagonal head bolt, it can not only ensure the fixing strength, but also avoid the stress concentration points caused by traditional welding or riveting, thus improving the fatigue resistance.

[0023] Reference Figures 2-5 Each mounting position has a positioning groove 102 on its inner wall, and the positioning groove 102 is connected to the large diameter section 1011. The positioning protrusion 2011 has an integrally formed positioning flange 203 that corresponds to the positioning groove 102. The positioning flange 203 and the positioning groove 102 are respectively adapted to each other. In application, the positioning groove 102 and the positioning flange 203 are mechanically interlocked to achieve precise positioning of the module and prevent the module from shifting during high-speed operation. Compared with the traditional pinhole positioning method, it can improve the positioning accuracy.

[0024] Reference Figures 1-3 The needle module 2 can be a single-needle module, a double-needle module, or a multi-needle module, and needle modules 2 of different specifications can be mixed and installed on the same needle plate substrate 1. For example, double-needle modules (5mm spacing) are used in the interlayer reinforcement area of ​​carbon felt, and single-needle modules are used in the edge area. After adjustment, a needle penetration depth test (standard: ±0.1mm) is required. In application, the multi-specification mixed-assembly design allows the combination of different modules such as single needles and double needles on the same needle plate, so that the equipment can quickly adapt to the needle penetration density requirements of different materials such as carbon felt and carbon fiber preforms, thereby expanding the range of applicable processes of the equipment.

[0025] Reference Figures 1-5 A heat dissipation gap 4 is left between the module body 201 and the large diameter section 1011. In application, the gap design forms an air convection channel, which effectively reduces the temperature rise caused by the friction between the needle 202 and the needle plate substrate 1 during high-speed continuous operation, and avoids the deviation of the needle trajectory caused by thermal deformation.

[0026] The working principle of this utility model is as follows: Initial installation operation: First, clean the mounting position on the needle plate base 1 and check that the positioning groove 102 is free of burrs. Then, align the positioning flange 203 of the single / double needle module with the positioning groove 102 on the needle plate base 1 and press it vertically into the stepped through hole. Finally, screw in the internal hexagonal head bolt from the bottom of the needle plate base 1 and tighten it twice with a torque wrench (first 15 N·m, then 25 N·m). Replacement of damaged module: First, stop the machine and remove the corresponding hexagonal head bolt at the bottom. Then, use a special ejector tool (such as an ejector rod) to gently tap the bottom of the needle module 2 to remove the old needle module 2. Finally, install the new needle module 2 and tighten it again. Use an external tool (such as a laser positioning device) to calibrate the needle puncture trajectory.

[0027] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A carbon felt needle plate for a needle punching machine, comprising a needle plate substrate (1), characterized in that: The needle plate base (1) is provided with a number of regularly arranged mounting positions. The mounting position is a stepped through hole that penetrates the needle plate base (1). The upper part of the stepped through hole is a large diameter section (1011), and the lower part is a small diameter section (1012). Each mounting position is detachably mounted with an independent needle module (2). The needle module (2) includes a module body (201) and at least one needle (202) fixed on the needle module (2). The upper part of the module body (201) has a positioning protrusion (2011) that cooperates with the large diameter section (1011).

2. The carbon felt needle plate of the needle punching machine according to claim 1, characterized in that: The needle module (2) is fixed upward from the bottom of the needle plate base (1) into the stepped through hole by a locking member (3).

3. The carbon felt needle plate for a needle punching machine according to claim 2, characterized in that: The positioning protrusion (2011) has a threaded hole (2012), and the locking member (3) is an internal hexagonal head bolt. The head of the internal hexagonal head bolt is supported on the stepped surface of the small diameter section (1012), and the threaded end is screwed into the threaded hole (2012).

4. The carbon felt needle plate of the needle punching machine according to claim 1, characterized in that: Each of the mounting positions has a positioning groove (102) on its inner wall, and the positioning groove (102) is connected to the large diameter section (1011).

5. The carbon felt needle plate of the needle punching machine according to claim 4, characterized in that: The positioning protrusion (2011) has an integrally formed positioning flange (203) that corresponds to the positioning groove (102), and the positioning flange (203) and the positioning groove (102) are respectively adapted to each other.

6. The carbon felt needle plate of the needle punching machine according to claim 1, characterized in that: The needle module (2) is one of a single needle module, a double needle module or a multi-needle module, and needle modules (2) of different specifications can be mixed and installed on the same needle plate substrate (1).

7. The carbon felt needle plate of the needle punching machine according to claim 1, characterized in that: A heat dissipation gap (4) is left between the module body (201) and the large diameter section (1011).

Images