A machining process of a large disc gear and a large bell gear on a double-sided large circular knitting machine

Abstract

The present application relates to a kind of big disc gear and big Ding gear combined rolling machining process on double-sided large circle machine, through tooling, big Ding gear is stacked with big disc gear and is processed synchronously, reduces the multiple errors generated by single processing, the present application uses new processing technology in the tooth surface of rough and fine rolling big disc gear and big Ding gear of gear hobbing machine, can greatly reduce processing error and form tolerance, clamping error and gear hobbing machine error, the runout of the two addendum circles, the length of common normal line can produce unified good effect, precision is improved a lot, big disc gear and big Ding gear synchronous debugging are much smoother.

Description

Technical Field

[0001] This invention relates to the field of large circular knitting machines, and more particularly to a machining process for the combined rolling of large disc gears and large tripod gears on a double-sided large circular knitting machine. Background Technology

[0002] Both the large ding gear and the large disc gear are key components of a circular knitting machine, used to drive the upper needle plate and lower needle cylinder to move synchronously, thereby driving the upper and lower hook needles. When the circular knitting machine is working, it is necessary to ensure the concentricity and rotation angle consistency of the large ding gear and the large disc gear during synchronous operation. However, since the two gears are machined separately, there will be errors in the clamping roundness direction, machining errors of the workpiece itself, and clearance fit errors of the worm gear and worm of the gear hobbing machine. Therefore, after the large disc gear and the large ding gear are assembled, the synchronous correction and adjustment cannot meet the ideal requirements. Ultimately, this may cause deviations in the rotation angle and concentricity of the upper needle plate and the lower needle cylinder, thereby affecting the knitting needle action and reducing the quality of the fabric. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the aforementioned problems in the prior art, this invention provides a machining process for the combined hobbing of a large disc gear and a large ding gear on a double-sided large circular hobbing machine. By roughing and finishing the tooth surfaces of the large disc gear and the large ding gear on the hobbing machine, machining errors, geometric tolerances, clamping errors, and hobbing machine errors can be greatly reduced. This process also produces a uniform and good effect on the runout of the tip circles and the length of the common normal of the two gears.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] A machining process for the meshing of a large disc gear and a large tripod gear on a double-sided large circular milling machine, characterized by the following steps:

[0008] Step 1: Roll out the fixture from the gear hobbing machine worktable, and lock the fixture in the center of the worktable with the outer circle and flatness within 0.01mm.

[0009] Step 2: Align the outer diameter of the large disc gear within 0.01mm, then gently place the gear washer on the top outer side of the large disc gear. Next, align the inner hole of the large ding gear with the boss of the center positioning fixture for mating, while ensuring that the bottom outer side of the large ding gear and the gear washer are in tight contact.

[0010] Step 3: Place several clamping blocks on the outer side of the upper end of the large gear, press them down to the top of the clamping blocks using the clamping plate, and lightly tighten the other end of the clamping plate with a nut. Align the two magnetic gauges with the dial indicator at the same position on the upper and lower sides of the large gear and the large gear, and check that the runout is within 0.01mm. Tighten the nuts symmetrically on the left and right sides one by one. After tightening, if the upper and lower dial indicators do not change, start gear rolling.

[0011] Step 4: Remove burrs after completion.

[0012] Furthermore, the clearance between the inner hole of the large gear and the boss of the central positioning fixture is 0.02mm-0.03mm.

[0013] Furthermore, eight clamping pads are evenly distributed on the outer side of the upper end of the large cauldron gear.

[0014] Furthermore, the clamping plate is arranged horizontally; the end of the clamping plate away from the clamping pad is sleeved on a fixed rod vertically set on the workbench; the nut is threadedly connected to the fixed rod.

[0015] Furthermore, step four also includes marking the same location after completion.

[0016] (III) Beneficial Effects

[0017] The beneficial effects of this invention are: by using the new processing technology to rough and finish roll the tooth surfaces of the large disc gear and the large tripod gear on the gear hobbing machine, the processing error, form and position tolerance, clamping error and gear hobbing machine error can be greatly reduced. It can produce a uniform and good effect on the runout of the tip circle and the length of the common normal of the two gears, and the accuracy is greatly improved. The synchronous debugging of the large disc gear and the large tripod gear is much smoother. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the processing technology and installation of the present invention; Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example 1, please refer to Figure 1 As shown:

[0024] A machining process for the combined rolling of a large disc gear and a large tripod gear on a double-sided large circular milling machine includes the following steps:

[0025] Step 1: The tooling 10 is rolled out onto the worktable 50 of the gear hobbing machine. The outer diameter and flatness of the tooling 10 are adjusted to within 0.01mm and locked in the center of the worktable 50. The bottom of the tooling 10 is provided with a through hole 11 for fixed connection with the worktable 50. When adjusting the outer diameter of the tooling 10, the central axis of the tooling 10 coincides with the central rotation axis of the worktable 50. When the flatness is calibrated to within 0.01mm, it can rotate synchronously with the worktable 50. The top of the tooling 10 is machined with a boss 12 that mates with the central inner hole of the large gear 20.

[0026] Step Two: Adjust the outer diameter of the large disc gear 40 to within 0.01mm to ensure coaxial rotation with the worktable 50 and fixture 10. Then, gently place the gear washer 30 onto the outer upper surface boss of the large disc gear 40. Next, align the inner hole of the large tripod gear 20 with the boss 12 of the center positioning fixture, ensuring a tight contact between the bottom outer side of the large tripod gear 20 and the gear washer 30. The gear washer 30 prevents interference when the large disc gear 40 and the large tripod gear 20 overlap, and also prevents interference between the large disc gear 40 and the large tripod gear 20. The direct overlap of the ding gear 20 affects the end face quality. Further, a tight contact connection is achieved through the gear washer 30. Compared with screw fixing and other methods, this can effectively reduce the lateral force on the large disc gear 40 and the large ding gear 20, and avoid affecting the roundness of the gears. The direct stacking method can ensure that the large disc gear 40 and the large ding gear 20 are only subjected to longitudinal pressure during positioning, which can improve positioning accuracy and roundness. Moreover, after fixing in subsequent steps, it will not affect the circular runout value of the large disc gear 40 and the large ding gear 20, effectively improving consistency.

[0027] Step 3: Place several clamping pads 17 on the outer side of the upper end of the large gear 20. Preferably, place the clamping pads 17 at 8 evenly distributed positions on the outer side of the upper end of the large gear 20. Press the clamping plate 16 onto the clamping pads 17. The end of the clamping plate 16 away from the clamping pads 17 is fitted onto the fixing rod 14 vertically set on the worktable 50. The fixing rod 14 is threaded with a nut 15 located above the clamping plate 16. Lightly tighten the nut 15. The clamping plate 16 is horizontally arranged. Since there will be a certain step between the outer side and the middle of the upper end of the large gear 20, multiple clamping pads 17 can also be placed at the same position to ensure that the clamping plate 16 remains horizontal. After raising the clamping plate 16 to a horizontal position, align the two magnetic gauges with the dial indicator at the same position on the upper and lower sides of the large disc gear 40 and the large tripod gear 20, and check that their runout is within 0.01mm. Tighten the nuts 15 symmetrically one by one. After tightening, the upper and lower dial indicator runout does not change, and start gear hobbing. By lightly tightening the nuts 15, the influence of the downward pressure on the large disc gear 40 and the large tripod gear 20 is reduced, avoiding errors in gear flatness. This facilitates adjustment. At the same time, lightly tightening first can improve the calibration accuracy and facilitate adjustment. Since the fixation is done by applying vertical downward pressure, light tightening can simulate the force state after tightening, improving the calibration accuracy. Meanwhile, one end of the clamping plate 16 is sleeved on the fixed rod 14 and tightened by the nut 15. The clamping plate 16 is used to apply downward pressure to the clamping pad 17 by its elasticity, which effectively controls the magnitude of the downward pressure and avoids deformation of the large ding gear 20 caused by the hard connection. The elastic soft connection of the present invention can provide a purer downward pressure and reduce the impact of the hard connection on the large ding gear 20.

[0028] Step 4: Remove burrs after completion.

[0029] Furthermore, the clearance between the inner hole of the large gear and the boss of the central positioning fixture is 0.02mm-0.03mm.

[0030] Furthermore, step four also includes marking the same location after completion.

[0031] This invention utilizes a new processing technology to rough and finish roll the tooth surfaces of large disc gears and large tripod gears on a gear hobbing machine. This can greatly reduce machining errors, geometric tolerances, clamping errors, and gear hobbing machine errors. It can also produce a uniform and good effect on the runout of the tip circle and the length of the common normal of the two gears, greatly improving the accuracy. It also makes the synchronous debugging of large disc gear 40 and large tripod gear 20 much smoother.

[0032] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A machining process for the meshing of a large disc gear and a large tripod gear on a double-sided large circular milling machine, characterized in that: Includes the following steps: Step 1: Roll out the fixture from the gear hobbing machine worktable, and lock the fixture in the center of the worktable with the outer circle and flatness within 0.01mm. Step 2: Align the outer diameter of the large disc gear within 0.01mm, then gently place the gear washer on the top outer side of the large disc gear. Next, align the inner hole of the large ding gear with the boss of the center positioning fixture for mating, while ensuring that the bottom outer side of the large ding gear and the gear washer are in tight contact. Step 3: Place several clamping blocks on the outer side of the upper end of the large gear, and press them down onto the top of the clamping blocks using the clamping plate. Lightly tighten the other end of the clamping plate with a nut. Align the two magnetic gauges with the dial indicator at the same position on the large gear and the large gear. The end of the clamping plate away from the clamping blocks is fitted onto a fixed rod vertically set on the worktable. A nut is threaded onto the fixed rod above the clamping plate, and the nut is threaded onto the fixed rod. Lightly tighten the nut, and the clamping plate is horizontally arranged. Check that the runout is within 0.01mm. Tighten the nuts symmetrically on both sides one by one. After tightening, if the upper and lower dial indicator runout does not change, start gear hobbing. Step 4: Remove burrs after completion.

2. The machining process for the large disc gear and the large tripod gear on a double-sided large circular milling machine according to claim 1, characterized in that: The clearance between the inner hole of the large gear and the boss of the central positioning fixture is 0.02mm-0.03mm.

3. The machining process for the large disc gear and the large tripod gear on a double-sided large circular milling machine according to claim 1, characterized in that: Eight clamping pads are evenly distributed on the outer side of the upper end of the large cauldron gear.

4. The machining process for the meshing of a large disc gear and a large tripod gear on a double-sided large circular milling machine according to claim 1, characterized in that: Step four also includes marking the same location after completion.

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