Guide groove machining equipment for saw chain guide plate

Abstract

The utility model discloses a guide groove processing device of a saw chain guide plate, which comprises a guide plate clamping jig used for clamping the guide plate, a machine head with a main shaft, a grinding wheel arranged on the main shaft and a high-pressure cooling water spraying assembly, the main shaft drives the grinding wheel to rotate, and the machine head moves relative to the guide plate in the rotating process of the grinding wheel so as to process a guide groove on the guide plate. The high-pressure cooling water spraying assembly is provided with a high-pressure nozzle for spraying cooling water to the grinding wheel and the guide plate, the grinding wheel is a resin grinding wheel, the guide plate clamping jig comprises a lower positioning plate, an upper positioning plate and a clamping bolt for connecting the lower positioning plate and the upper positioning plate, and the upper positioning plate and the lower positioning plate clamp and fix the guide plate. Due to the fact that the high-strength wear-resistant anti-fatigue alloy material is adopted to replace a conventional heat treatment harvester guide plate material, the grinding wheel is adopted for direct machining, one-time forming can be achieved, it can be ensured that the material organization structure cannot be changed in heat treatment, and the production efficiency, the cutter cost and the quality condition are all improved.

Description

[Technical field]

[0001] The utility model belongs to the technical field of chain saw parts processing, in particular to the processing technology of a saw chain guide plate. [Background technology]

[0002] like Figure 1 and Figure 2 As shown, the traditional material manufacturing process of the guide plate 100 of the chain saw used in the harvester (large logging machine) is: using a high-quality alloy material with a hardness of HRC30. In order to facilitate the processing of the guide groove, the material needs to be annealed and heat treated for 24 hours first, and the guide groove is processed with a carbide circular saw blade milling cutter 200. After completion, the whole is vacuum quenched to HRC45 and then tempered for 6 hours. In order to enhance the strength of the guide groove, high-frequency quenching treatment is required, and a 2-hour tempering heat treatment process is performed again to complete the key process of the guide groove part. Finally, the production of other processes is transferred.

[0003] In order to ensure the guide groove process, five heat treatments were carried out successively, including processing, quenching, annealing and tempering, which took more than 30 hours in total.

[0004] Using high-strength wear-resistant and fatigue-resistant alloy materials to replace conventional heat-treated harvester guide plate materials can avoid the frequent and complex heat treatment processes such as annealing, quenching, and multiple tempering required for ordinary materials. However, the use of carbide circular saw blade milling cutters to process guide plates made of high-strength wear-resistant and fatigue-resistant alloy materials has low processing efficiency and high processing costs. [Contents of the utility model]

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a guide groove processing device for a saw chain guide plate, so as to improve the processing efficiency and reduce the processing cost.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a guide groove processing device for a saw chain guide plate, comprising a guide plate clamping fixture for clamping the guide plate, the guide groove processing device also includes a machine head with a spindle, a grinding wheel installed on the spindle, and a high-pressure cooling water spray assembly, the spindle drives the grinding wheel to rotate and the machine head moves relative to the guide plate during the rotation of the grinding wheel to process the guide groove on the guide plate, the high-pressure cooling water spray assembly is provided with a high-pressure nozzle for spraying cooling water onto the grinding wheel and the guide plate, the grinding wheel is a resin grinding wheel, the guide plate clamping fixture comprises a lower positioning plate, an upper positioning plate and a clamping bolt connecting the lower positioning plate and the upper positioning plate, the upper positioning plate and the lower positioning plate clamp and fix the guide plate.

[0007] Preferably, the diameter of the grinding wheel is ≥200 mm, and the thickness of the grinding wheel is ≥2 mm.

[0008] Preferably, the high-pressure cooling water spray assembly is provided with two sets of upper and lower high-pressure nozzles, and the high-pressure nozzles form an angle with the grinding wheel plane.

[0009] Preferably, the high-pressure cooling water injection assembly is connected to a high-pressure water circulation cooling system.

[0010] Preferably, the guide groove processing equipment also includes waterproof and dustproof covers arranged on the left and right sides of the machine head.

[0011] Preferably, the lower positioning plate is provided with positioning pins for positioning the guide plate.

[0012] The utility model adopts the above technical solution and has the following beneficial effects:

[0013] High-strength, wear-resistant and fatigue-resistant alloy materials are used to replace conventional heat-treated harvester guide plate materials, avoiding the complex heat treatment processes such as annealing, quenching and multiple tempering required for ordinary materials.

[0014] Since the high-strength wear-resistant, fatigue-resistant and wear-resistant material has a hardness of HRC50-60, it is directly processed by a grinding wheel, which can be formed in one step, ensuring that the material structure will not change during heat treatment, thereby affecting the quality of the guide plate. In addition, the use of grinding wheels instead of milling cutters has broken through the technical barriers of the industry, and its production efficiency, tool cost and quality have all been improved.

[0015] In addition, a high-pressure nozzle is used to spray cooling water onto the guide plate to ensure that the material will not be decarburized (annealed).

[0016] In short, the adoption of the above technical solution improves the processing efficiency and processing quality, thereby significantly reducing the processing cost.

[0017] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings.

Brief Description of the Drawings

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the conventional material manufacturing process of the guide plate of a harvester (logging chain saw) in the prior art;

[0020] Figure 2 It is a schematic diagram of the prior art using a carbide circular saw blade milling cutter to process a guide groove;

[0021] Figure 3 A process roadmap for machining guide plates using high-strength, wear-resistant, fatigue-resistant materials;

[0022] Figure 4 This is a schematic diagram of the utility model using a grinding wheel to process the guide groove;

[0023] Figure 5 It is a structural schematic diagram of the guide groove processing equipment of the utility model;

[0024] Figure 6 for Figure 5 The enlarged structural diagram at A in the middle;

[0025] Reference numerals: guide plate 100 , guide groove 101 , guide plate clamping fixture 2 , lower positioning plate 21 , upper positioning plate 22 , clamping bolt 23 , grinding wheel 300 , machine head 3 , spindle 31 , high-pressure nozzle 32 , waterproof and dustproof cover 4 . [Specific implementation method]

[0026] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0027] Those skilled in the art will appreciate that, in the absence of conflict, the features in the following embodiments and implementations may be combined with each other.

[0028] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the words "upper", "lower", "left", "right", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] When large guide plates for large logging machines are used in harsh and cold areas, they are usually broken due to the large impact and the hard material. The heat generated by the saw chain during high-speed rotary cutting causes the guide groove of ordinary materials to wear quickly, and even annealing. The utility model first optimizes the guide plate material, collects various usage conditions and environmental requirements based on the feedback from the use of large guide plates for harvesters abroad, and in order to better promote the high-quality professional harvester guide plates to the international high-end quality market, after long-term market research and analysis by material experts, high-strength wear-resistant and fatigue-resistant alloy materials are used to replace conventional heat-treated harvester guide plate materials. The guide plate is made of alloy steel with a hardness of HRC50-60, which can be selected from existing alloy steel materials. High-strength, high-toughness, wear-resistant materials will effectively avoid or reduce rapid wear and even annealing.

[0032] Since the guide plate 100 is mainly for harvesters (logging chainsaws), it is a large guide plate, the thickness of the guide plate is ≥4mm, such as 5mm, 6mm, and the edge of the guide plate is provided with a guide groove 101, the width of the guide groove is ≥2mm, such as 2.2mm, and the depth is ≥8mm, such as 10mm. Therefore, a specially designed guide groove processing equipment is used to process the guide groove. Figures 3 to 6 As shown, the utility model provides a guide groove processing equipment for a high-strength, hard and wear-resistant guide plate, and improves the structure of the existing CNC machining center. First, a guide plate processing fixture 2 is designed, and in addition, a high-pressure water cooling system is added to meet the process requirements of grinding wheel machining guide grooves. The guide groove processing equipment includes a guide plate clamping fixture 2 for clamping the guide plate, a machine head 3 with a spindle 31, a grinding wheel 300 installed on the spindle, and a high-pressure cooling water injection assembly. The spindle 31 drives the grinding wheel 300 to rotate, and during the rotation of the grinding wheel, the machine head 3 moves relative to the guide plate to process the guide groove 101 on the guide plate. The high-pressure cooling water injection assembly is provided with a high-pressure nozzle 32 for spraying cooling water to the grinding wheel 300 and the guide plate 100.

[0033] Ordinary CNC machining centers can reach very high speeds during machining, but the spindle load is not large, and the maximum torque is about 10N.M. In order to meet the cutting efficiency and grinding wheel linear speed requirements when machining high-strength, wear-resistant and fatigue-resistant guide plates, the spindle torque is ≥60N.M, such as 60N.M, 70N.M.

[0034] Wherein, the grinding wheel 300 is a resin grinding wheel. The diameter of the grinding wheel is ≥200mm. The thickness of the grinding wheel is ≥2mm, and the design of the grinding wheel needs to specifically correspond to the width of the guide groove. Resin grinding wheels are used to replace circular milling cutters for processing, and meet the requirements of milling cutter processing technology. Ordinary alumina grinding wheels cannot be too thin. First, thin grinding wheels cannot be made larger. Second, thin grinding wheels are prone to bursting when working at high speeds, causing safety accidents. Moreover, thin grinding wheels must achieve a flatness of less than 0.05mm, which is difficult for manufacturers to manufacture. Adding explosion-proof nets to resin grinding wheels can effectively control the bursting problem.

[0035] Specifically, the high-pressure cooling water spray assembly is provided with two sets of upper and lower high-pressure nozzles 32, and the high-pressure nozzles have an angle with the grinding wheel plane. Preferably, the angle between the high-pressure nozzles and the grinding wheel plane is 8°-12°, for example, 10°.

[0036] With reference to the prior art, the high-pressure cooling water jet assembly is connected to a high-pressure water circulation cooling system, which includes a high-pressure water pipe, a water pump, a filtration system, etc. In view of the dust precipitation generated during the grinding wheel processing, a fine, multi-channel magnetic suction filtration system and high-precision flow monitoring can be used to ensure a high-pressure, high-flow circulation cooling system. The 8 nozzles are divided into a 20° angle design for the grinding wheel, and are arranged in pairs up and down and distributed in the left and right directions. Generally, a large number of sparks will be generated during the high-speed cutting process of the grinding wheel. The larger the spark, the greater the heat energy generated, and the deeper the decarburization layer, the lower the annealing hardness of the material. On the contrary, the smaller the spark, the less heat is generated, and the cutting surface will not be decarburized, and the hardness of the material itself can be maintained. Generally, the grinding wheel processing or the deep groove cutting cannot achieve rapid cooling because the groove is narrow and deep, and can only be processed at a low speed with a milling cutter. In this embodiment, a high-pressure multi-group spray grinding fluid is used to quickly and fully cool the heat generated by grinding in the deep groove to ensure that no decarburization layer is generated during high-speed cutting. The grinding wheel will generate a lot of heat when cutting at high speed. In addition, the product groove is deep, and the heat cannot cool down in time, which will cause decarburization and annealing of the cut surface. Therefore, this problem is solved by 8 high-pressure nozzles and a high-pressure water circulation cooling system.

[0037] Specifically, the guide plate clamping fixture includes a lower positioning plate 21, an upper positioning plate 22, and a clamping bolt 23 connecting the lower positioning plate and the upper positioning plate. After the upper positioning plate and the lower positioning plate are fastened by the clamping bolt 23, the guide plate is clamped and fixed. In order to facilitate the positioning of the guide plate, the lower positioning plate is provided with a positioning pin for positioning the guide plate, and the guide plate is correspondingly provided with a positioning hole that cooperates with the positioning pin. In this way, the guide plate is placed on the lower positioning plate, positioned by the positioning pin, and then the upper positioning plate is placed, and the upper positioning plate and the lower positioning plate are fixed by the clamping bolt, so that the guide plate is clamped and fixed to prevent loosening during the grinding process of the guide plate, so as to ensure the processing accuracy of the guide groove.

[0038] In addition, the guide groove processing equipment also includes waterproof and dustproof covers 4 arranged on the left and right sides of the machine head. The grinding wheel will generate a large amount of water mist and sediment during high-speed processing, and the waterproof and dustproof covers are set according to the characteristics of generating water mist.

[0039] In summary, the utility model customizes a high-performance, high-strength, wear-resistant and fatigue-resistant guide plate material that can be used in various environments. The hardness of the material does not require a complex heat treatment process to be directly processed once, maintaining the raw material's organizational structure of impact resistance, wear resistance, high strength and high toughness; in view of the processing method of high-strength wear-resistant materials, a guide plate guide groove processing equipment has been developed, which uses a grinding wheel for processing and is cooled by a high-pressure cooling system to ensure that the material will not anneal during the processing process. In short, after using new materials, new processes, and new equipment, its production efficiency and energy consumption account for less than 1 / 4 of the cost of traditional manufacturing processes.

Claims

1. A guide groove processing device for a saw chain guide plate, comprising a guide plate clamping fixture for clamping the guide plate, characterized in that: The guide groove processing equipment also includes a machine head with a spindle, a grinding wheel installed on the spindle, and a high-pressure cooling water spray assembly. The spindle drives the grinding wheel to rotate and the machine head moves relative to the guide plate during the rotation of the grinding wheel to process the guide groove on the guide plate. The high-pressure cooling water spray assembly is provided with a high-pressure nozzle for spraying cooling water onto the grinding wheel and the guide plate. The grinding wheel is a resin grinding wheel. The guide plate clamping fixture includes a lower positioning plate, an upper positioning plate, and clamping bolts connecting the lower positioning plate and the upper positioning plate. The upper positioning plate and the lower positioning plate clamp the guide plate.

2. The guide groove processing device for a saw chain guide plate according to claim 1, characterized in that: The diameter of the grinding wheel is ≥200 mm, and the thickness of the grinding wheel is ≥2 mm.

3. The guide groove processing equipment for a saw chain guide plate according to claim 1, characterized in that: The high-pressure cooling water spray assembly is provided with two groups of upper and lower high-pressure nozzles, and the high-pressure nozzles form an angle with the grinding wheel plane.

4. The guide groove processing device for a saw chain guide plate according to claim 1, characterized in that: The high-pressure cooling water injection assembly is connected to a high-pressure water circulation cooling system.

5. The guide groove processing device for a saw chain guide plate according to claim 1, characterized in that: The guide groove processing equipment also includes waterproof and dustproof covers arranged on the left and right sides of the machine head.

6. The guide groove processing equipment for a saw chain guide plate according to claim 1, characterized in that: The lower positioning plate is provided with positioning pins for positioning the guide plate.

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