Vertical belt pulley groove cutter and machining process thereof

Abstract

The invention relates to the technical field of belt pulley grooving cutters, and discloses a vertical belt pulley grooving cutter and a machining process thereof. The cutter bar comprises a bar head and a bar body which are integrally formed; a mounting groove of a special-shaped structure is formed in the rod head, and a limiting hole is formed in one side of the blade groove. The blade body comprises a cuboid blade, and the blade comprises a square positioning part and cutting edge parts arranged on the two sides of the square positioning part; the upper side and the lower side of each blade part are each provided with a blade, so that four blades which are completely symmetrical are formed. A chip rolling groove is formed in each cutting edge, and the front angle of each cutting edge is 7-15 degrees; a positioning hole is formed in the middle of the square positioning part and corresponds to the limiting hole. The cutter body of the cuboid structure is adopted, two cutting edges can be machined at a time, the stability of the cutter is guaranteed, meanwhile, the machining steps are reduced, the cutter strength is improved, the machining efficiency is effectively improved, and economic benefits are improved.

Description

Technical Field

[0001] The invention relates to the technical field of pulley grooving cutters, and in particular to a vertically mounted pulley grooving cutter and a processing technology thereof. Background Art

[0002] In the field of pulley grooving, the current mainstream grooving cutter products mainly adopt two structural designs: flat or vertical. Flat blades occupy a certain share in the market due to their simple structure and convenient manufacturing. Their single-sided multi-edge design (usually 2-4 edges) shows good economy while ensuring processing accuracy. Vertical blades generally adopt a triangular 3-edge structure. Although this blade has higher strength and impact resistance and can meet high-load processing requirements, its complex geometry significantly increases the difficulty of processing compared to flat blades, and the manufacturing cost also increases accordingly.

[0003] It is worth noting that in actual production, whether it is a flat or vertical structure, each blade needs to be cut one by one. This serial production method not only has low processing efficiency, but also restricts the improvement of production rhythm, and it is difficult to meet the needs of modern manufacturing for efficient processing. Summary of the invention

[0004] The present invention aims to provide a vertical pulley groove cutter and a processing technology thereof, so as to solve the problems that the existing groove cutters are difficult to process and each blade needs to be processed successively, resulting in low processing efficiency and low blade strength.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a vertically mounted pulley groove cutter, comprising a tool rod and a blade body; the tool rod comprises an integrally formed rod head and a rod body; a mounting groove with a special-shaped structure is provided on the rod head, and a limiting hole is provided on one side of the mounting groove; the blade body comprises a rectangular blade, and the blade comprises a square positioning portion, and a blade portion provided on both sides of the square positioning portion; a blade is provided on the upper and lower sides of each blade portion to form four completely symmetrical blades; a chip groove is provided on each blade, and the front angle of the blade is 7° to 15°; a positioning hole is provided in the middle of the square positioning portion, and the positioning hole corresponds to the limiting hole.

[0006] At the same time, the present invention also provides a vertical pulley groove cutter processing process, which is applied to the manufacture of the vertical pulley groove cutter, and includes the following steps:

[0007] Step 1, install the fixture on the base of the grinder, arrange multiple blade blanks in the blade slot of the fixture in sequence, make the blade edge on one side face upward, and make one side of the square positioning part close to one side of the blade slot; clamp and fix the blade blank by the clamping device of the fixture;

[0008] Step 2, using a grinding wheel to rotate at high speed along the direction in which the blades are arranged, so that the grinding wheel contacts the blade blank and grinds it into a corresponding pulley groove tooth shape, thereby obtaining two blades on one side of the blade portion;

[0009] Step 3, release the clamping device, turn the blade blank upside down, make the blade edge on the other side face up, and clamp it against one side of the blade groove with the clamping device; repeat step 2 to obtain two blades on the other side of the blade edge.

[0010] The principles and advantages of this solution are:

[0011] In the existing pulley groove cutter structure design, the flat blade has the characteristics of simple structure and easy production and processing. This blade has 2 to 4 edges on one side of the blade, which has good economic benefits. The vertical blade mostly adopts a triangular 3-edge structure. This blade has the advantages of high strength and good impact resistance, and can ensure that the blades do not interfere with each other during grinding, ensuring the grinding effect.

[0012] However, the triangular three-blade structure needs to have its cutting edge set at the angle, and in order to ensure the strength of the blade, its overall structure is complex. Therefore, each blade needs to be processed one by one during production, which makes the processing difficult and the processing efficiency low. However, this solution breaks away from the inherent triangular blade structure design thinking, creatively designs the tool body into a rectangular structure, and sets blade parts on both sides, so that the blade part has two blades at the same time, and combined with the designed tool rod structure, the two blades on one side can also ensure that only one cutting edge contacts the workpiece during processing without causing interference. At the same time, the rectangular structure design can make the distance between the blades larger, and the thickness of the blade can be further increased to improve the blade strength. This not only reduces the processing difficulty, but also allows two blades to be processed at the same time during processing. Finally, four blades can be processed in two processes, which reduces the processing flow while ensuring the synchronization and accuracy of the cutting edge. At the same time, more blades can be obtained, which has greater cutting strength, extends the service life of the tool, and greatly improves the efficiency of production and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a schematic structural diagram of a vertically mounted pulley groove cutter.

[0014] Figure 2 The present invention is a schematic diagram of a tool bar structure of a vertically mounted pulley groove cutter.

[0015] Figure 3 The present invention is a schematic diagram of the blade body structure of a vertically mounted pulley groove cutter.

[0016] Figure 4 The present invention is a top view of the combined structure of a vertically mounted pulley groove cutter.

[0017] Figure 5The present invention is a side view of the combined structure of a vertically mounted pulley groove cutter.

[0018] Figure 6 The present invention is a side view of a blade body of a vertically mounted pulley groove cutter.

[0019] Figure 7 The present invention is a schematic structural diagram of a vertical pulley groove cutter during grinding.

[0020] Figure 8 The present invention is a schematic diagram of the overall structure of a vertical pulley groove cutter processing technology.

[0021] Fig. 9 The present invention is a schematic diagram of the structure of a fixture in a vertical pulley groove cutter processing technology.

[0022] Fig.10 The present invention is a schematic structural diagram of a grinding wheel in a vertical pulley groove cutter processing technology.

[0023] Fig.11 for Fig.10 Schematic diagram of the structure of section AA in .

[0024] The symbols in the drawings of the specification include: a knife bar 1, a rod head 101, a rod body 102, a mounting groove 110, a limiting hole 111, a placement portion 112, a strip-shaped clamping portion 113, and an empty knife groove 114;

[0025] The blade body 2, the blade 201, the square positioning portion 210, the blade portion 211, the positioning hole 212, the plum screw 3;

[0026] Blade blank 4, fixture 5, base 501, stopper 502, blade slot 503, fixing slot 504, groove 505, clamping device 6, grinding wheel 7, workpiece 8. DETAILED DESCRIPTION

[0027] The following is further described in detail through specific implementation methods:

[0028] Embodiment 1

[0029] In this embodiment, a vertical pulley groove cutter has a breakthrough use of a symmetrical rectangular structure cutter body, and the cutting edges are set on both sides, so that when processing the blade, not only is clamping simpler, but also processing is easier. Only one processing is required to obtain the same side upper and lower completely identical tooth shape, that is, two cutting edges, which improves the accuracy of the cutting edge. Finally, four cutting edges can be obtained through two processings, which reduces the processing steps and increases the number of cutting edges, greatly improving the production and processing efficiency. In this embodiment, as shown in the attached Figure 1 As shown, the vertical pulley groove cutter includes a cutter bar 1 and a blade body 2.

[0030] The knife bar 1 comprises a bar head 101 and a bar body 102 which is a rectangular parallelepiped structure. Figure 2 As shown, the length of the rod head 101 is 17-20 mm, the width is 13-15 mm, and the height is 24-27 mm. The length of the rod shaft 102 is 147-149 mm, the width is consistent with the width of the rod head 101, and the height is 24-26 mm. In this embodiment, the length of the rod head 101 is 19 mm, the width is 14 mm, and the height of the highest point is 26 mm, which is convenient for installing the blade body 2. The top of the rod head 101 is an inclined surface, and the rod shaft 102 is a rectangular parallelepiped structure with a length of 130 mm, a width of 14 mm, and a height of 25 mm, which is more convenient for installation. The angle between the inclined surface of the rod head 101 and the plane on the rod shaft 102 is 6°, ensuring that only one cutting edge of the blade body 2 contacts the workpiece during use to avoid interference.

[0031] A mounting groove 110 with a special-shaped structure is provided on one side of the rod head 101, and the width of the mounting groove 110 is consistent with the width of the blade body 2, so as to facilitate the placement of the blade body 2. At the same time, a limiting hole 111 is provided on one side wall of the mounting groove 110, and the limiting hole 111 is used to fix the blade body 2 on the mounting groove 110.

[0032] As attached Figure 3 As shown, the blade body 2 includes a blade 201 that is an overall rectangular parallelepiped structure. The length of the blade 201 is 17 to 20 mm, the width is 5 to 7 mm, and the height is 12 to 14 mm. Specifically, in this embodiment, the length of the blade 201 is 18 mm, the width is 6 mm, and the height is 13 mm. The blade 201 includes a square positioning portion 210 located in the middle, and blade portions 211 located on both sides of the square positioning portion 210, wherein the longitudinal cross-section of the blade portion 211 is a triangular structure, that is, from a top view, as shown in the attached figure, Figure 4 As shown, the blade portion 211 is a triangular structure, and the height of the triangle is 3 to 4 mm, that is, the height of the blade portion 211 is 3 to 4 mm, and can be specifically set to 3.5 mm. The angle of the blade is 35 to 45°, that is, the top angle of the triangle is 35 to 45°, and can be specifically set to 40°. Figure 5 As shown, the two sides of the blade portion 211 are respectively inclined outward, that is, they are inclined upward and downward, so that the transverse cross section of the blade portion 211 is a trapezoidal structure, that is, from a side view, its inclination angle with the horizontal plane is 3 to 5 degrees, and can be specifically set to 5 degrees. The connection between the blade portion 211 and the square positioning portion 210 is an arc angle, that is, the end of the blade portion 211 is lower than the height of the square positioning portion 210, so that the two parts form a step shape at the connection, making the installation more stable.

[0033] As attached Figure 6As shown, a blade is provided on the upper and lower sides of each blade portion 211 to form four completely symmetrical blades, namely a, b, c, and d. A chip groove is provided on each blade, and the front angle of the blade is 7° to 15°. A positioning hole 212 is provided in the middle of the square positioning portion 210, and the positioning hole 212 corresponds to the limiting hole 111.

[0034] Combined with Figure 1 and attached Figure 2 As shown, the mounting groove 110 includes a placement portion 112 in a square structure, and the placement portion 112 corresponds to the square positioning portion 210, so that the blade can be installed on the placement portion 112. A strip-shaped clamping portion 113 for placing the blade portion 211 is provided on one side of the placement portion 112 in the direction of the shaft 102. The strip-shaped clamping portion 113 is a trapezoidal structure opened inward, which can not only meet the placement of the blade portion 211, but also will not damage the blade portion 211. An empty knife groove 114 is provided below the strip-shaped clamping portion 113 to avoid tool interference, reduce friction or reserve a space for tool withdrawal, thereby improving processing accuracy and efficiency.

[0035] In this embodiment, the mounting groove is deflected counterclockwise at an angle A in the side plane, so that the blade is deflected counterclockwise at an angle A after being installed in the mounting groove, forming a back angle A. In this embodiment, the back angle A is 6°. During installation, the blade edge portion 211 of the blade body 2 is placed in the strip-shaped clamping portion 113, and the positioning hole 212 of the blade body 2 corresponds to the limiting hole 111 of the rod head 101, and is fixedly installed by the plum screw 3.

[0036] In this embodiment, a breakthrough is made in that the blade is not arranged in a triangular structure, but a symmetrical rectangular vertical structure is adopted, and the two sides are used as the positions of the blade parts, and a blade is arranged at the upper and lower ends of the blade part, thereby forming four completely symmetrical blades on both sides. At the same time, the designed tool bar installation structure is combined, so that even if the two blades on the same side are processed, they will not interfere with each other, as shown in the attached figure. Figure 7 As shown, only one blade contacts the workpiece to ensure machining accuracy and pass rate. At the same time, the thickness of the blade can be increased to improve the blade strength, and one more blade can be designed on the basis of three blades to improve the overall strength and service life of the blade. At the same time, the rectangular blade is easier to manufacture than the triangular blade, and the difficulty is lower. During processing, only two processing steps are required to complete the processing of the four-blade blade. Compared with the triangular three-blade blade, the processing efficiency is higher and the economic benefits are better.

[0037] Embodiment 2

[0038] In this embodiment, a vertical pulley groove cutter processing technology is also provided, which is applied to the vertical pulley groove cutter mentioned above, as shown in the attached Figure 8 As shown, the following steps are included:

[0039] S1, install the fixture 5 on the base of the grinder, arrange multiple blade blanks 4 in sequence in the blade slot 503 of the fixture 5, so that the blade portion on one side is facing upward, and one side of the square positioning portion 210 is close to one side of the blade slot 503; clamp and fix the blade blank 4 through the clamping device 6 of the fixture 5.

[0040] As attached Fig. 9 As shown, the fixture 5 includes a base 501 of a rectangular parallelepiped structure as a whole, a square stopper 502 is provided on one side of the base 501, and a blade slot 503 recessed downward is provided at the front end of the stopper 502. In this embodiment, the structure of the blade slot 503 corresponds to the structure of the blade body 2, so that during processing, the blade portion 211 and the square positioning portion 210 on one side of the blade blank 4 can be placed in the blade slot 503, while the blade portion on the side to be processed is exposed and placed above the fixture 5. Removable and detachable clamping devices 6 are respectively provided on the three sides of the blade slot 503. In this embodiment, the clamping device 6 is a rectangular parallelepiped structure, and its height after installation needs to be lower than the height of the blade blank 4 after placement, so as to ensure that the blade portion to be processed of the blade blank 4 can be fully exposed without affecting the processing process, thereby ensuring the accuracy and stability of the processing.

[0041] At the same time, a fixing groove 504 for installing the clamping device 6 is also provided on the base 501. The shape of the fixing groove 504 corresponds to the clamping device 6, so that the clamping device 6 can be completely placed on the base 501 and the blade blank 4 can be clamped and fixed. A plurality of fastening holes are also provided on the clamping device 6. Correspondingly, threaded holes matching the fastening holes are also provided on the fixing groove 504. When installing, the clamping device 6 can be fixed on the base 501 by bolts.

[0042] Grooves 505 are also provided on both sides of the base 501 , and the clamping device 6 can be quickly disassembled through the grooves 505 , making the operation more convenient and labor-saving, thereby improving operability.

[0043] When placing the blade blank 4, the fixture 5 is first installed on the grinding machine base, and then multiple blade blanks 4 can be placed side by side in the blade slot 503, and one side of the blade blank 4 is abutted against the stopper 502, and the blade blank 4 is limited by the stopper 502. Then, the clamping device 6 is placed in the other three directions of the blade blank 4 in turn, and it is fixed by bolts, so that multiple blade blanks 4 are installed on the fixture 5 to complete the fixation.

[0044] S2, the grinding wheel 7 is rotated at high speed along the direction of blade arrangement to make it contact with the blade blank 4 and grind it into a corresponding pulley groove tooth shape to obtain two blade edges on one side of the blade portion.

[0045] As attached Fig.10As shown, the grinding wheel 7 is a molded grinding wheel, and the axial cross-section profile of its outer circle coincides with the tooth shape of the pulley groove, that is, a triangular structure. Fig.11 As shown, the grinding wheel 7 is fed in the set grinding direction, that is, it moves along the direction of the blade groove 503 for grinding. Thus, the grinding process of two edges on one side of a disposable single blade is completed. When the grinding wheel completes one grinding, two identical tooth shapes can be obtained on the upper and lower sides of one side of the blade.

[0046] S3, release the clamping device 6, turn the blade blank 4 upside down, make the blade edge on the other side face upward, and clamp it against one side of the blade groove through the clamping device; repeat step 2 to obtain two blades on the other side of the blade edge.

[0047] After the processing of the blade portion on one side is completed, the clamping device 6 is opened, and then the blade blank 4 is turned over so that the blade portion on the other side faces upward, and after being clamped and fixed by the clamping device 6 again, the step S2 is repeated to grind the blade portion on the other side, thereby completing the grinding process of the two edges of the single blade on the other side, and obtaining two completely identical tooth shapes on the upper and lower sides of the other side. Finally, the tooth shape of four edges is obtained through two grindings.

[0048] In this embodiment, the traditional triangular annular three-blade structural design is broken, and a rectangular structure that is believed to interfere with each other is adopted for improvement. However, this solution effectively ensures that the blades will not interfere with each other during processing through the clever design of the blade and the positioning part in the blade body structure, combined with the structure of the arbor, and overcomes the problem that only a triangular structure can be used. At the same time, the blade is set to a trapezoidal structure, and a blade can be set at each of the upper and lower ends, thereby realizing a 4-blade structure, and the thickness of the blade can be increased, further improving the strength of the blade body. More importantly, during manufacturing, this solution is more convenient to clamp and the processing structure is simpler. It is not necessary to process each blade one by one, but two blades can be processed at the same time, which greatly reduces the processing steps, improves the processing efficiency, and can ensure that the two blades on the same side are more accurate and the tooth shape is more fitted. In addition, multiple blades can be processed at the same time, further improving the overall processing efficiency.

[0049] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A vertical pulley groove cutter, characterized in that: It comprises a tool rod and a blade body; the tool rod comprises an integrally formed rod head and a rod body; a mounting groove with a special-shaped structure is provided on the rod head, and a limiting hole is provided on one side of the mounting groove; the blade body comprises a rectangular blade, and the blade comprises a square positioning portion, and a blade portion arranged on both sides of the square positioning portion; a blade is respectively provided on the upper and lower sides of each blade portion to form four completely symmetrical blades; a chip rolling groove is provided on each blade, and the front angle of the blade is 7° to 15°; a positioning hole is provided in the middle of the square positioning portion, and the positioning hole corresponds to the limiting hole.

2. A vertical pulley groove cutter according to claim 1, characterized in that: The installation groove comprises a placement portion in a square structure, the placement portion corresponds to the square positioning portion; a strip-shaped clamping portion for placing the blade portion is provided on one side of the placement portion toward the direction of the shaft; and an empty blade groove is provided below the strip-shaped clamping portion.

3. The vertical pulley groove cutter according to claim 1, characterized in that: The blade has a length of 17 to 20 mm, a width of 5 to 7 mm, and a height of 12 to 14 mm.

4. The vertical pulley groove cutter according to claim 1, characterized in that: The two sides of the blade portion are respectively inclined outwards, and the angle between the blade portion and the horizontal plane is 3-5 degrees; the connection between the blade portion and the square positioning portion is an arc angle.

5. The vertical pulley groove cutter according to claim 1, characterized in that: The blade is deflected counterclockwise at an angle A in the mounting groove, forming a back angle A.

6. A vertical pulley groove cutter processing technology, characterized in that: The vertical pulley groove cutter used in any one of claims 1 to 6 comprises the following steps: Step 1, install the fixture on the base of the grinder, arrange multiple blade blanks in the blade slot of the fixture in sequence, make the blade edge on one side face upward, and make one side of the square positioning part close to one side of the blade slot; clamp and fix the blade blank by the clamping device of the fixture; Step 2, using a grinding wheel to rotate at high speed along the direction in which the blades are arranged, so that the grinding wheel contacts the blade blank and grinds it into a corresponding pulley groove tooth shape, thereby obtaining two blades on one side of the blade portion; Step 3, release the clamping device, turn the blade blank upside down, make the blade edge on the other side face up, and clamp it against one side of the blade groove with the clamping device; repeat step 2 to obtain two blades on the other side of the blade edge.

7. A vertical pulley groove cutter processing process according to claim 6, characterized in that: The clamp comprises a base, a stopper is arranged on one side of the base, and a downwardly recessed blade groove is arranged at the front end of the stopper; clamping devices are arranged on the three sides of the blade groove respectively; the height of the clamping device is lower than the height of the blade blank after being placed.

8. A vertical pulley groove cutter processing technology according to claim 6, characterized in that: The grinding wheel is a molded grinding wheel, and the axial cross-section profile of the outer circle of the grinding wheel is consistent with the tooth shape of the belt pulley groove.

9. A vertical pulley groove cutter processing process according to claim 7, characterized in that: A fixing groove for installing a pressing device is also provided on the base.

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