A slotting cutter for machining rectangular internal splines and a gear shaping machine tool provided with the slotting cutter

Abstract

The present invention discloses a slotting tool for processing rectangular internal splines and a gear shaping machine tool provided with the slotting tool, characterized in that: it comprises a tool bar, a blade is circumferentially installed at the bottom of the outer wall of the tool bar, and the blade comprises a tooth edge and a chamfering edge arranged in sequence along the radial direction of the tool bar at one end away from the tool bar, and is used to simultaneously perform gear shaping and chamfering processing. The present invention improves processing efficiency and precision, and by modifying existing equipment, avoids the influence of electric spark processing on product precision, thereby improving processing precision and efficiency, saving labor costs and production time, and the equipment and materials are locally sourced, and no other equipment needs to be introduced, so it is suitable for promotion in the market.

Description

Technical Field

[0001] The present invention relates to the field of machinery, and in particular to a gear shaping cutter for machining rectangular internal splines and a gear shaping machine tool provided with the gear shaping cutter. Background Art

[0002] With the development of the new energy automobile industry, many motor shafts need to be machined with rectangular internal splines at the end to connect to the gearbox shaft. Due to interference, rectangular internal splines cannot be processed on gear shaping machines, and ordinary keyway barbering machines have a series of problems such as cumbersome adjustments, poor machine tool rigidity, and no tool release mechanism. Therefore, EDM is usually used, which is costly, inefficient, and has poor precision. Therefore, it is an inevitable demand for new energy automobile companies to design a universal new process that can adapt to various types of rectangular internal splines. Summary of the invention

[0003] In view of this, one of the objects of the present invention is to provide a slotting cutter for machining rectangular internal splines, which has the advantage of improving machining efficiency and precision. The second object is to provide a gear shaping machine equipped with the slotting cutter, which has the advantage of improving machining precision and efficiency and saving labor costs and production time.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A slotting tool for processing rectangular internal splines comprises a tool bar, at least one blade is circumferentially mounted on the bottom of the outer side wall of the tool bar, the blade comprises a tooth edge and a chamfering edge arranged in sequence along the radial direction of the tool bar at one end away from the tool bar, and is used for simultaneously forming the tooth slotting and chamfering processes.

[0006] Furthermore, the tooth edge is constructed as a rectangular body, and its axis is parallel to the axis of the knife rod.

[0007] Furthermore, the chamfering edge is constructed as an isosceles trapezoid, the axis of which is parallel to the axis of the tool bar.

[0008] Furthermore, the small surface of the chamfering edge is connected to the tooth edge, the large surface is arranged at the end of the chamfering edge away from the tool rod, and the chamfered portion of the chamfering edge and the connecting portion of the tooth edge have a smooth transition.

[0009] A gear shaping machine tool for machining a slotting cutter of a rectangular internal spline comprises a machine table and a dividing tool arranged on the machine table for gear shaping. The dividing tool comprises a tool chassis and a dividing plate connected in sequence. A workpiece position is arranged at the center of the dividing plate, and a slotting cutter is arranged above the workpiece position.

[0010] Furthermore, the inserting tool includes a tool rod, and at least one blade is installed at the bottom of the outer side wall of the tool rod. The blade includes a tooth edge and a chamfering edge arranged in sequence along the radial direction of the tool rod at one end away from the tool rod, which is used to simultaneously perform tooth inserting and chamfering processing.

[0011] Furthermore, a positioning sleeve is provided at the connection between the workpiece position and the dividing plate.

[0012] Furthermore, the bottom end of the positioning sleeve extends into the interior of the tooling chassis and is slidably matched with the tooling chassis.

[0013] Furthermore, the tooling chassis and the indexing plate are indexed by means of an indexing hole provided on the tooling chassis and a connector adapted to the indexing hole.

[0014] Furthermore, it also includes a clamping mechanism, and the tooling chassis and the dividing plate are tightly connected through the clamping mechanism.

[0015] The beneficial effects of the present invention are:

[0016] The present invention improves processing efficiency and precision. By modifying existing equipment, the influence of electric spark processing on product precision is avoided, thereby improving processing precision and efficiency, saving labor costs and production time. Moreover, the equipment materials are locally sourced and there is no need to introduce other equipment. Therefore, it is suitable for promotion in the market.

[0017] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings, in which:

[0019] Attached Figure 1 It is a schematic diagram of the insert blade structure;

[0020] Attached Figure 2 It is a schematic diagram of the structure of the insert blade;

[0021] Attached Figure 3 It is a schematic diagram of the indexing tooling structure;

[0022] Attached Figure 4 It is a schematic diagram of the structure of the gear shaping machine tool;

[0023] Attached Figure 5It is a comparison diagram of the product before and after processing, where Figure a is the shape of the workpiece before processing, and Figure b is the shape of the workpiece after processing. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, rather than for limiting the protection scope of the present invention.

[0025] The present invention provides a slotting cutter for machining rectangular internal splines, such as Figure 1 and 2 The tool shown includes a tool bar 1, and a blade 2 is circumferentially installed on the bottom of the outer side wall of the tool bar 1. The blade 2 includes a tooth edge 21 and a chamfering edge 22 which are sequentially arranged along the radial direction of the tool bar 1 at one end away from the tool bar 1. If there are two or more blades 2, the axes of the blades 2 are parallel to each other. The tooth edge 21 is constructed as a rectangular body, and its axis is parallel to the axis of the tool bar 1. The tooth edge 21 is constructed as a rectangular body in order to process a rectangular internal spline. At the same time, the chamfering edge 22 is constructed as an isosceles trapezoid, and its axis is parallel to the axis of the tool bar 1. This is for simultaneously forming the gear shaping and chamfering.

[0026] Preferably, in order to meet production and process requirements, the small surface of the chamfering edge 22 is connected to the tooth edge 21, that is, the small surface of the chamfering edge 22 completely overlaps with the rectangular surface of the tooth edge 21, and the large surface is arranged at the end of the chamfering edge 22 away from the tool rod 1. The chamfered portion of the chamfering edge 22, that is, the connecting portion of the inclined surface and the tooth edge 21 has a smooth transition, and the internal spline chamfer and the rectangular tooth portion of the processed workpiece are relatively smooth, which meets the process requirements of the internal spline.

[0027] The present invention also provides a gear shaping machine tool for machining a rectangular internal spline. Figure 4 As shown, it includes a machine table 10, and also includes a dividing tool for gear shaping arranged on the machine table, the dividing tool includes a tool chassis 3 and a dividing plate 4 connected in sequence, as shown in FIG. Figure 3 As shown, a workpiece position 9 is provided at the center of the indexing plate 4 for placing the workpiece to be processed, and a plunger is provided above the workpiece position 9. The plunger includes a tool bar 1, and a blade 2 is circumferentially installed at the bottom of the outer wall of the tool bar 1. The blade 2 includes a tooth edge 21 and a chamfering edge 22 which are sequentially arranged along the radial direction of the tool bar 1 at one end away from the tool bar 1. If there are two or more blades 2, the axes of the blades 2 are parallel to each other. The tooth edge 21 is constructed as a rectangular body, and its axis is parallel to the axis of the tool bar 1. The tooth edge 21 is constructed as a rectangular body in order to process a rectangular internal spline. At the same time, the chamfering edge 22 is constructed as an isosceles trapezoid, and its axis is parallel to the axis of the tool bar 1, in order to simultaneously perform the shaping of the toothing and chamfering.

[0028] As a further improvement, a positioning sleeve 5 is provided at the connection between the workpiece position 9 and the dividing plate 4 for positioning the workpiece. At the same time, the bottom end of the positioning sleeve 5 extends into the interior of the tooling chassis 3 and is slidably fitted with the tooling chassis 3, so that the dividing plate 4 can drive the workpiece to rotate through the positioning sleeve 5.

[0029] As a further improvement, the tooling chassis 3 and the dividing plate 4 are indexed by means of a dividing hole provided on the tooling chassis 3 and a connector 6 adapted to the dividing hole. In this embodiment, the connector 6 is a pin, that is, when an internal spline is processed, the connector 6 is pulled out, indexed, and then the connector is inserted to perform the internal spline processing.

[0030] As a further improvement, the tooling chassis 3 and the dividing plate 4 are tightly connected through a clamping mechanism, which includes a clamping plate 8 and bolts cooperating with the clamping plate 8, and also includes an "L"-shaped clamping piece 7 and bolts cooperating with it. The function of the clamping mechanism is to tighten the bolts of the clamping plate 8 and the clamping piece 7 to clamp the tooling chassis 3 and the dividing plate 4 when indexing is completed, and loosen the bolts of the clamping plate 8 and the clamping piece 7 when indexing is required, i.e. processing the internal spline.

[0031] The present invention can also dismantle the tooth division mechanism of the common gear shaping machine (Y54A) (because the original tooth division mechanism cannot be used), retain the tool letting mechanism of the original machine tool, change the tool feed structure to a numerically controlled automatic tool feed, and ensure reliable accuracy and stable processing.

[0032] The operation steps of a gear shaping machine tool for machining a rectangular internal spline with a slotting cutter proposed by the present invention are as follows:

[0033] 1. Loosen the bolts that match the clamping plate 8 and the clamping piece 7, prepare the insert and other tools, and install them;

[0034] 2. Place the workpiece to be processed at workpiece position 9;

[0035] 3. Start the automatic feed mechanism for driving the inserting tool to complete the processing of an internal spline;

[0036] 4. Pull out the connector 6 and index;

[0037] 5. Insert connector 6 and repeat step 3;

[0038] 6. Repeat steps 4-5 until the processing is completed;

[0039] 7. Turn off the motor and tighten the bolts that match the clamping plate 8 and the clamping piece 7.

[0040] Finished product Figure 5 shown.

[0041] The present invention improves processing efficiency and precision. By modifying existing equipment, the influence of electric spark processing on product precision is avoided, thereby improving processing precision and efficiency, saving labor costs and production time. Moreover, the equipment materials are locally sourced and there is no need to introduce other equipment. Therefore, it is suitable for promotion in the market.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A gear shaping machine tool for machining rectangular internal splines, comprising a machine table, characterized in that: It also includes an indexing tooling for gear shaping arranged on the machine table, the indexing tooling includes a tooling chassis and an indexing plate connected in sequence, a workpiece position is arranged at the center of the indexing plate, and a slotting cutter is arranged above the workpiece position; The inserting tool comprises a tool bar, at least one blade is circumferentially mounted on the bottom of the outer side wall of the tool bar, the blade comprises a tooth edge and a chamfering edge sequentially arranged along the radial direction of the tool bar at one end away from the tool bar, and is used for simultaneously forming the tooth inserting and chamfering processes; The tooth blade is constructed as a rectangular body, and its axis is parallel to the axis of the tool rod; the chamfered blade is constructed as an isosceles trapezoid, and its axis is parallel to the axis of the tool rod; The small surface of the chamfering edge is connected to the tooth edge, the large surface is arranged at the end of the chamfering edge away from the tool rod, and the chamfering part of the chamfering edge and the connecting part of the tooth edge have a smooth transition.

2. A gear shaping machine tool for machining rectangular internal splines according to claim 1, characterized in that: A positioning sleeve is arranged at the connection between the workpiece position and the indexing plate.

3. A gear shaping machine tool for machining rectangular internal splines according to claim 2, characterized in that: The bottom end of the positioning sleeve extends into the interior of the tooling chassis and is slidably matched with the tooling chassis.

4. A gear shaping machine tool for machining rectangular internal splines according to claim 3, characterized in that: The tooling chassis and the indexing plate are indexed by means of an indexing hole arranged on the tooling chassis and a connector matched with the indexing hole.

5. The gear shaping machine tool for machining rectangular internal splines according to claim 1, characterized in that: It also includes a clamping mechanism, through which the tooling chassis and the dividing plate are tightly connected.

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