A method for machining a rack by a rack and pinion mill

Abstract

This invention relates to a method for processing racks using a rack grinding mill, belonging to the technical field of rack processing equipment. This method employs an anti-rotation clamping mechanism to press the rack into the workpiece, achieving the purpose of preventing rotation. This solves the problem of poor quality existing in current processing methods and is particularly suitable for the needs of rack grinding mill processing.

Description

Technical Field

[0001] This invention relates to a method for processing racks using a rack milling machine, belonging to the technical field of rack processing equipment. Background Technology

[0002] In the field of rack machining technology, rack grinding machines are commonly used to complete rack machining. Existing rack grinding machines, such as the invention patent with authorization announcement number CN105108019B, which describes a rack grinding machine for machining steering gear racks using a linear grinding method, employ a workpiece clamping cylinder at one end and a fixed center at the other to clamp and fix the workpiece. Simultaneously, clamping cylinders are used to further tighten the workpiece. While the clamping devices of existing rack grinding machines can meet the requirements to a certain extent, they still have the following problems:

[0003] 1. Existing clamping methods have the problem of insufficient clamping force, which makes the workpiece prone to rotation during processing.

[0004] 2. The existing clamping method uses a fixed center at one end and a workpiece clamping cylinder at the other end to fix the workpiece. Although the existing method can fix the workpiece, the force conditions at both ends are not exactly the same during the workpiece processing, which leads to poor quality problems in the rack machining process.

[0005] Therefore, it is necessary to develop a new method for machining racks to solve the problem of poor quality in existing clamping devices. Summary of the Invention

[0006] The purpose of this invention is to provide a rack and pinion mill clamping device that is compact in structure and ingenious in design, so as to solve the problem of poor quality of existing clamping devices.

[0007] The technical solution of this invention is:

[0008] A method for processing racks using a rack and pinion mill, characterized in that the method includes the following steps:

[0009] 1. Place the workpiece:

[0010] Place the workpiece on the lower mold body of the rack and pinion mill clamping device;

[0011] 2. Lock the workpiece:

[0012] The left and right clamping assemblies clamp the workpiece from both ends. During this process, as the clamping pins clamp and fix the workpiece from both ends, the anti-rotation teeth compress the ends of the workpiece, deforming them and ultimately locking them into the interior of the workpiece ends. Then, the locking assembly's pressing slider clamps the workpiece from both sides. After the pressing slider clamps the workpiece, the locking cylinder pushes the locking slider forward. During this forward movement, the locking slider is locked by the pressure of the inclined plane and the pressed inclined plane.

[0013] 3. Processing workpieces:

[0014] The rack and pinion mill lifts the table to the milling position; then the rack and pinion mill drives the upper die to swing back and forth in a straight line; during the straight back and forth swing of the upper die, the workpiece is repeatedly rolled by its own concave teeth; when the upper die is working, its working height is fixed, while the table gradually lifts the workpiece and presses it into the upper die, and finally lifts the workpiece to the predetermined height position, so that the required tooth shape can be processed by the concave teeth in the upper die.

[0015] The clamping device of the rack and pinion mill includes a platform, a lower mold body, a left clamping assembly, a right clamping assembly, and a locking assembly; the lower mold body is mounted in the middle of the platform; the left clamping assembly is mounted on the platform at one end of the lower mold body; the right clamping assembly is mounted on the platform at the other end of the lower mold body; and a locking assembly is mounted on the platform between the lower mold body and the right clamping assembly; characterized in that: both the left clamping assembly and the right clamping assembly include a clamping cylinder and a clamping pin; the clamping pin is mounted on the platform via the clamping cylinder; and an anti-rotation locking tooth is provided at one end of the clamping pin.

[0016] The cross-section of the anti-rotation tooth is triangular.

[0017] Both the left and right clamping assemblies include guide seats; guide seats are fixedly mounted on the platform on one side of the clamping cylinder of the left and right clamping assemblies; the clamping pin on the clamping cylinder passes through the corresponding guide seat and is slidably connected to it.

[0018] The clamping pin is provided with a guide rail; the clamping pin is slidably connected to the corresponding guide seat through the guide rail.

[0019] The locking assembly includes a locking base, a pressing slider, a pressing cylinder, a locking slider, and a locking cylinder; the locking base is mounted on the platform; the pressing slider is symmetrically slidably mounted on the locking base via guide rails; a pressing cylinder is mounted on the locking base on one side of the pressing slider; the pressing cylinder is connected to the corresponding pressing slider; a locking slider is longitudinally slidably mounted on the platform outside the pressing slider; a locking cylinder is mounted on the locking base at one end of the locking slider; the locking cylinder is connected to the corresponding locking slider; the locking slider and the corresponding pressing slider are in intermittent contact connection.

[0020] The inner side of the pressing slider is provided with a pressing arc.

[0021] The inner side of the locking slider is provided with multiple pressing slopes at intervals; the outer side of the pressing slider is provided with pressing slopes at intervals; the pressing slopes and the corresponding pressing slopes are intermittently in contact.

[0022] The advantages of this invention are:

[0023] This method of processing racks using a rack and pinion mill employs an anti-rotation clamping mechanism that presses the clamping teeth into the workpiece to prevent rotation. This solves the quality problems inherent in current processing methods and is particularly suitable for rack and pinion mill processing. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the rack and pinion mill clamping device of the present invention;

[0025] Figure 2 This is a top view of the rack and pinion mill clamping device of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the left clamping assembly of the present invention;

[0027] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0028] Figure 5 for Figure 3 A schematic diagram of the structure after removing the guide seat;

[0029] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0030] Figure 7 This is a schematic diagram of the structure of the right clamping assembly and the locking assembly of the present invention;

[0031] Figure 8 This is a schematic diagram of the locking assembly of the present invention;

[0032] Figure 9 for Figure 8 Enlarged structural diagram at point C;

[0033] Figure 10 for Figure 7 Enlarged structural diagram at point D;

[0034] Figure 11 for Figure 10 A schematic diagram of the structure after removing the guide seat;

[0035] Figure 12 This is a schematic diagram of the workpiece's working state structure;

[0036] Figure 13 for Figure 12 A magnified structural diagram at point E in the middle.

[0037] In the diagram: 1. Platform; 2. Lower mold body; 3. Left clamping assembly; 4. Right clamping assembly; 5. Locking assembly; 6. Clamping cylinder; 7. Clamping pin; 8. Anti-rotation tooth; 9. Guide seat; 10. Guide slide rail; 11. Locking base; 12. Pressing slider; 13. Pressing cylinder; 14. Locking slider; 15. Locking cylinder; 16. Pressing arc; 17. Pressing inclined surface; 18. Pressed inclined surface; 19. Workpiece. Detailed Implementation

[0038] The method for processing racks using a rack milling machine utilizes a clamping device for the rack milling machine, including a platform 1, a lower mold body 2, a left clamping assembly 3, a right clamping assembly 4, and a locking assembly 5 (see the attached instruction manual). Figure 1 and 2 ).

[0039] The lower mold body 2 is installed in the middle of the platform 1; during operation, the workpiece 19 (rack) can be placed on the lower mold body 2.

[0040] A left clamping assembly 3 is mounted on the platform 1 at one end of the lower mold body 2; a right clamping assembly 4 is mounted on the platform 1 at the other end of the lower mold body 2 (see the instruction manual appendix). Figure 1 and 2 ).

[0041] Both the left clamping assembly 3 and the right clamping assembly 4 include a clamping cylinder 6 and a clamping pin 7; the clamping pin 7 is mounted on the platform 1 via the clamping cylinder 6; one end of the clamping pin 7 is provided with an anti-rotation tooth 8 (see the attached instruction manual). Figure 6 and 11 The anti-rotation tooth 8 has a triangular cross-section (see instruction manual appendix). Figure 6 ).

[0042] Both the left clamping assembly 3 and the right clamping assembly 4 include guide seats 9; guide seats 9 are fixedly mounted on the platform 1 on one side of the clamping cylinder 6 on the left clamping assembly 3 and the right clamping assembly 4; the clamping pin 7 on the clamping cylinder 6 passes through the corresponding guide seat 9 and is slidably connected to it. A guide rail 10 is provided on the clamping pin 7; the clamping pin 7 is slidably connected to the corresponding guide seat 9 through the guide rail 10 (see the appendix of the instruction manual). Figure 4 , 6 and 11).

[0043] The purpose of arranging the left clamping assembly 3 and the right clamping assembly 4 in this way is to ensure that during operation, when the clamping pins 7 of the left clamping assembly 3 and the right clamping assembly 4 clamp and fix the workpiece 19 from both ends, the anti-rotation teeth 8 can compress the two ends of the workpiece 19, causing it to deform and eventually engage with the inside of the end of the workpiece 19. During this process, because the clamping pin 7 can only slide back and forth along the guide seat 9 under the action of the guide slide rail 10, when the workpiece 19 is subjected to torque causing the clamping pin 7 to have a tendency to rotate, the guide seat 9 can resist the rotation of the clamping pin 7 through the guide slide rail 10. This achieves the purpose of clamping and fixing the workpiece 19 while preventing its rotation.

[0044] A locking assembly 5 is installed on the platform 1 between the lower mold body 2 and the right clamping assembly 4 (see the instruction manual appendix). Figure 1 and 2 The locking assembly 5 includes a locking base 11, a pressing slider 12, a pressing cylinder 13, a locking slider 14, and a locking cylinder 15 (see the instruction manual appendix). Figure 8 ).

[0045] A locking base 11 is mounted on the platform 1; a pressing slider 12 is symmetrically slidably mounted on the locking base 11 via a guide rail; a pressing cylinder 13 is mounted on the locking base 11 on one side of the pressing slider 12; the pressing cylinder 13 is connected to the corresponding pressing slider 12 (see the instruction manual appendix). Figure 8 ).

[0046] During operation, under the action of the clamping cylinder 13, the clamping slider 12 can clamp and fix the workpiece 19 from both sides. The inner side of the clamping slider 12 is provided with a clamping arc 16 (see the instruction manual appendix). Figure 8 The purpose of setting the clamping arc 16 is to enable the clamping slider 12 to clamp and fix the workpiece 19 through the arc surface of the clamping arc 16 during operation, thus avoiding the problem of relatively low clamping strength caused by the clamping slider 12 contacting the workpiece 19 through line contact.

[0047] A locking slider 14 is longitudinally slidably mounted on the platform 1 outside the pressing slider 12; a locking cylinder 15 is mounted on the locking base 11 at one end of the locking slider 14; the locking cylinder 15 is connected to the corresponding locking slider 14; the locking slider 14 is intermittently contacted with the corresponding pressing slider 12.

[0048] The inner side of the locking slider 14 is provided with multiple pressing inclined surfaces 17 at intervals; the outer side of the pressing slider 12 is provided with pressing inclined surfaces 18 at intervals; the pressing inclined surfaces 17 and the corresponding pressing inclined surfaces 18 are in intermittent contact connection (see the attached instruction manual). Figure 8 and 9 ).

[0049] The purpose of arranging the locking slider 14 and the clamping slider 12 in this way is to ensure that during operation, after the clamping slider 12 clamps and fixes the workpiece 19 from both sides, the locking cylinder 15 pushes the locking slider 14 forward. During the forward movement of the locking slider 14, the clamping slider 14 further locks the clamping slider 12 by pressing the inclined surface 17 and the pressed inclined surface 18. This avoids the problem of the workpiece 19 loosening due to backward movement when the clamping slider 12 is subjected to excessive force during operation.

[0050] The method for processing racks using a rack and pinion mill includes the following steps:

[0051] 1. Place workpiece 19:

[0052] Place workpiece 19 onto the lower mold body 2 of the rack and pinion mill clamping device;

[0053] 2. Locking workpiece 19:

[0054] The left clamping assembly 3 and the right clamping assembly 4 clamp the workpiece 19 from both ends. During this process, when the clamping pin 7 clamps and fixes the workpiece 19 from both ends, the anti-rotation teeth 8 can compress the two ends of the workpiece 19, causing it to deform and eventually engage with the inside of the end of the workpiece 19. Then, the pressing slider 12 of the locking assembly 5 clamps the workpiece 19 from both sides. After the pressing slider 12 clamps the workpiece 19, the locking cylinder 15 pushes the locking slider 14 forward. During the forward movement of the locking slider 14, it presses the pressing slider 12 by pressing the inclined plane 17 and the pressed inclined plane 18, thus locking it.

[0055] 3. Processing workpiece 19:

[0056] The rack and pinion mill lifts the table 1 to the milling position; then the rack and pinion mill drives the upper die to swing back and forth in a straight line; during the straight back and forth swing of the upper die, the workpiece 19 is repeatedly rolled by its own concave teeth; when the upper die is working, its working height is fixed, while the table 1 gradually lifts the workpiece and presses it into the upper die, and finally lifts the workpiece to the predetermined height position, so that the required tooth shape can be processed by the concave teeth in the upper die.

[0057] This method of processing racks using a rack and pinion mill employs an anti-rotation clamping mechanism that presses the clamping teeth into the workpiece to prevent rotation. This solves the quality problems inherent in current processing methods and is particularly suitable for rack and pinion mill processing.

Claims

1. A method of machining a rack with a rack and pinion mill, characterized by: The method for processing racks using a rack and pinion mill includes the following steps: S1. Place the workpiece (19): Place the workpiece (19) onto the lower mold body (2) of the rack and pinion mill clamping device; S2, Locking the workpiece (19): The left clamping assembly (3) and the right clamping assembly (4) clamp the workpiece (19) from both ends. During this process, when the clamping pin (7) clamps the workpiece (19) from both ends, the anti-rotation tooth (8) can press the two ends of the workpiece (19) to deform it and finally insert it into the inside of the end of the workpiece (19). Then the pressing slider (12) of the locking assembly (5) clamps the workpiece (19) from both sides. After the pressing slider (12) clamps the workpiece (19), the locking cylinder (15) pushes the locking slider (14) forward. During the forward movement of the locking slider (14), it presses the pressing slider (12) by pressing the inclined plane (17) and the pressed inclined plane (18) to lock it. S3. Processing workpiece (19): The rack and pinion mill lifts the table (1) to the milling position; then the rack and pinion mill drives the upper die to swing back and forth in a straight line; during the back and forth swing of the upper die, the workpiece (19) is repeatedly rolled by its own concave teeth; when the upper die is working, its working height is fixed, while the table (1) gradually lifts the workpiece and presses it into the upper die, and finally lifts the workpiece to the predetermined height position, so that the required tooth shape can be processed by the concave teeth in the upper die. The clamping device of the rack and pinion mill includes a platform (1), a lower mold body (2), a left clamping assembly (3), a right clamping assembly (4), and a locking assembly (5); the lower mold body (2) is mounted in the middle of the platform (1); the left clamping assembly (3) is mounted on the platform (1) at one end of the lower mold body (2); the right clamping assembly (4) is mounted on the platform (1) at the other end of the lower mold body (2); the locking assembly (5) is mounted on the platform (1) between the lower mold body (2) and the right clamping assembly (4); both the left clamping assembly (3) and the right clamping assembly (4) include a clamping cylinder (6) and a clamping pin (7); the clamping pin (7) is mounted on the platform (1) through the clamping cylinder (6); one end of the clamping pin (7) is provided with an anti-rotation tooth (8). The left clamping assembly (3) and the right clamping assembly (4) both include guide seats (9); guide seats (9) are fixed on the platform (1) on one side of the clamping cylinder (6) on the left clamping assembly (3) and the right clamping assembly (4); the clamping pin (7) on the clamping cylinder (6) passes through the corresponding guide seat (9) and is slidably connected to it; a guide rail (10) is provided on the clamping pin (7); the clamping pin (7) is slidably connected to the corresponding guide seat (9) through the guide rail (10); The locking assembly (5) includes a locking base (11), a pressing slider (12), a pressing cylinder (13), a locking slider (14), and a locking cylinder (15); the locking base (11) is mounted on the platform (1); the pressing slider (12) is symmetrically mounted on the locking base (11) via a guide rail; the pressing cylinder (13) is mounted on the locking base (11) on one side of the pressing slider (12); the pressing cylinder (13) is connected to the corresponding pressing slider (12); the locking slider (14) is longitudinally mounted on the platform (1) outside the pressing slider (12); the locking base (11) at one end of the locking slider (14) is mounted on the locking cylinder (15); the locking cylinder (15) is connected to the corresponding locking slider (14); the locking slider (14) and the corresponding pressing slider (12) are intermittently contacted.

2. A method of machining a rack with a rack and pinion machine according to claim 1, characterized in that: The cross-section of the anti-rotation tooth (8) is triangular.

3. A method of machining a rack with a rack and pinion machine according to claim 2, characterized in that: The inner side of the pressing slider (12) is provided with a pressing arc (16).

4. A method of machining a rack with a rack and pinion machine according to claim 2, characterized in that: The inner side of the locking slider (14) is provided with multiple pressing slopes (17) at intervals; the outer side of the pressing slider (12) is provided with pressing slopes (18) at intervals; the pressing slopes (17) and the corresponding pressing slopes (18) are intermittently in contact.

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