Secondary clamping, tooth aligning and positioning device for slotting inner gear ring

Abstract

The invention belongs to the technical field of inner gear ring machining equipment, and particularly relates to a slotting inner gear ring secondary clamping and tooth aligning positioning device which comprises a base, a clamp is arranged on the base and matched with a positioning sleeve through a sliding bearing, and the positioning sleeve is matched with an elastic tooth aligning device. The elastic tooth aligning device comprises a shell, a telescopic shaft is arranged in the shell, the two ends of the telescopic shaft extend out of the shell and then are connected with a cylindrical measuring bar and a drawing handle respectively, the telescopic shaft in the shell comprises a thick shaft body and a thin shaft body, and the thin shaft body is sleeved with a spring. The shell is connected with an overturning assembly, and the overturning assembly comprises an overturning plate and an overturning air cylinder. The inner gear ring positioning device is reasonable in structure, the inner gear ring can be accurately positioned, it is ensured that the inner gear ring keeps the same phase when the inner gear ring needs to be clamped on a gear shaping machine for multiple times, machining precision is improved, the rejection rate is reduced, and batch production is facilitated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of inner gear ring processing equipment, and particularly relates to a secondary clamping tooth positioning device for an inserted gear ring. BACKGROUND

[0002] At present, the common inner gear ring processing methods in China include gear insertion, gear broaching and gear scraping. Gear insertion is widely used due to the wide use of equipment, and the price of the equipment and the inner tooth cutter is the lowest among the three processing methods. Therefore, gear insertion is widely used in the inner gear ring of engineering machinery and as a pre-processing method for grinding inner gear rings. However, due to the structure of part of the inner gear ring, the inner groove or tooth side taper needs to be machined after the tooth shape of the inner gear ring is inserted and formed, and then the inner gear ring is machined again to eliminate the cutting burrs or deformation caused by machining the inner groove or tooth side taper, so as to ensure that the tooth direction and tooth shape of the inner gear meet the requirements. The processing flow of this type of inner gear ring is as follows: Gear hobbing internal tooth -> milling internal groove (or extruding internal tooth reverse taper) -> second gear hobbing internal tooth to eliminate the burr of milling internal groove or extruding reverse taper produced by the first hobbing The tooth side deformation produced by the first hobbing In the above processing flow, how to ensure that the gear cutter accurately aligns with the machined inner gear ring tooth groove when the inner gear ring is clamped into the gear insertion machine becomes a technical difficulty. If the relative position of the inner tooth groove cannot be accurately consistent every time when the inner gear ring is clamped into the gear insertion machine, the installation consistency cannot be maintained in batch processing, which will cause the inner gear ring that has been inserted and formed to be mistakenly cut by the gear cutter during the subsequent insertion machining, which is commonly known as the "misaligned tooth" phenomenon. Once the product is mistakenly cut, it is basically scrapped, causing great loss. In order to solve this problem, laser ranging is often used to align the teeth in the prior art. However, since most numerical control gear insertion machines still use cutting fluid for cooling during the insertion process, the recognition error rate is relatively high after the related lens is contaminated by the cutting fluid, and the effect is not good on most wet cutting numerical control gear insertion machines. Therefore, it is necessary to design a secondary clamping tooth positioning device for an inserted inner gear ring. SUMMARY

[0003] The purpose of the present application is to design a secondary clamping tooth positioning device for an inserted inner gear ring, which comprises a base, a clamp is arranged on the base, a positioning sleeve is matched with the clamp through a sliding bearing, and an elastic tooth alignment device is matched with the positioning sleeve. The elastic tooth alignment device comprises a shell, an extension shaft is arranged in the shell, a cylindrical gauge rod and a pulling handle are respectively connected to the two ends of the extension shaft which extend out of the shell, a limiting pin is arranged on the extension shaft between the shell and the pulling handle, the extension shaft in the shell comprises two parts of a rough shaft and a fine shaft, one end of the fine shaft extends out of the shell and is connected with the limiting pin, and a spring is sleeved on the fine shaft. The shell is connected with a turnover assembly, the turnover assembly comprises a turnover plate and a turnover cylinder, one end of the turnover plate is connected with the shell, the other end of the turnover plate is fixedly connected with a connecting shaft, the connecting shaft is rotatably connected with a fixed plate through a bearing, the rotating shaft is connected with the turnover cylinder, and the fixed plate is arranged on the clamp.

[0004] It should be noted that the elastic tooth device makes full use of the special structure of the inner gear ring, that is, the effective tooth side left after the inner groove or tooth side of the inner gear ring is inversely tapered, and the length of the cylindrical rod accounts for 80% of the length of the effective tooth side left. The cylindrical rod can fully contact the vicinity of the inner gear ring. After the cylindrical rod driven by the spring force enters the tooth groove of the inner gear ring, it is finally positioned against the tooth side of the inner gear ring at the pitch circle, so that the inner gear ring of the product to be machined can be accurately fixed at the same phase every time. The outer circle of the positioning sleeve is matched with the clamp through a sliding bearing. After the inner gear ring of the product to be machined is placed in the positioning sleeve, the inner hole of the positioning sleeve and the outer circle of the inner gear ring of the product to be machined are matched with a small gap, so that the inner gear ring of the product to be machined can rotate freely under the driving of the elastic tooth device, and the efficiency of the operator in installing and removing the product during production is improved, thereby improving the production and machining efficiency.

[0005] Preferably, the clamp comprises a mounting plate, and the mounting plate is provided with a mounting sleeve, and the outer circle of the positioning sleeve and the inner hole of the mounting sleeve are matched through a sliding bearing, so that the positioning sleeve can be flexibly taken out from the mounting sleeve.

[0006] Preferably, the clamp is connected with the base through a fine adjustment assembly, the fine adjustment assembly comprises a positioning plate and a rotating plate, the positioning plate is fixed on the base, a plurality of positioning holes are uniformly arranged on the positioning plate in the circumferential direction, the center of the rotating plate is rotatably connected with the center of the positioning plate through a bearing, the rotating plate is provided with a positioning pin matched with the positioning hole, the mounting plate is fixed on the rotating plate, and the fixed plate is fixed on the mounting plate.

[0007] It needs to be explained that after elastic tooth alignment, the positioning holes on the positioning plate are used, the spacing of these positioning holes is calculated respectively, such as the tooth thickness of the workpiece inner gear ring at the division circle is 0.02mm, that is, the tooth profile is 0.01mm on one side, so that when the left and right tooth sides are found to have a gap, the positioning pin is pulled out to rotate the rotating plate to drive the workpiece inner gear ring to rotate, and the left and right tooth side machining allowance is adjusted through the number of holes required, 1 hole spacing is 0.01mm, 2 hole spacing is 0.02mm, 3 hole spacing is 0.03mm, and so on. When initial machining, the positioning pin is inserted into the middle positioning hole of the positioning plate, so that 10 positioning holes are arranged on both sides of the middle positioning hole, that is, the right tooth surface of the inner gear ring tooth profile has 0.01-0.1mm fine adjustment function. After rotating the rotating plate to the required positioning hole, only the positioning pin needs to be inserted again, and the clamp is locked in the circumferential direction.

[0008] Preferably, the spacing between adjacent positioning holes is 0.01mm.

[0009] Preferably, the positioning hole is provided with 21.

[0010] Preferably, the positioning sleeve is matched with a pressing device, the pressing device includes a pressing block, a vertical telescopic rod and a rotating device, one end of the pressing block is matched with the positioning sleeve, the other end of the pressing block is connected with the rotating device, and the rotating device is connected with the telescopic end of the vertical telescopic rod. After the elastic tooth alignment device completes the tooth alignment positioning, the pressing device is started to press the inner gear ring of the product to be machined, and after pressing, the elastic tooth alignment device is turned over by the turnover assembly to leave the inner machining area of the inner gear ring, and the gear shaping cutter is started to machine the inner gear ring.

[0011] Preferably, the vertical telescopic rod is a telescopic air cylinder or an electric push rod or a hydraulic cylinder.

[0012] Preferably, the rotating device is a 90° rotating air cylinder or a 90° rotating oil cylinder.

[0013] The present application also includes other components that can enable a kind of insert cutting inner gear ring secondary clamping tooth alignment positioning device to be used normally, such as the control components of gear shaping machine tool, the control components of turnover air cylinder, the control components of vertical telescopic rod, the control components of 90° rotating air cylinder, the control components of 90° rotating oil cylinder and the like are all conventional technical means in the art. In addition, the devices or components not limited in the present application, such as spring, 90° rotating air cylinder, 90° rotating oil cylinder, turnover air cylinder, gear shaping cutter, sliding bearing, limit pin, positioning pin, gear shaping machine tool and the like are all conventional technical means and conventional equipment in the art.

[0014] Working principle: the inner gear ring to be processed is put into the mounting sleeve of the gear shaping machine after being put into the positioning sleeve, then the reversing cylinder is reversed to make the elastic tooth device reverse into the inner gear ring, at this time the cylindrical measuring rod is in sliding contact with the tooth side of the inner gear ring, rotating the positioning sleeve makes the cylindrical measuring rod driven by the elastic force into the tooth groove of the inner gear ring and abut against the tooth side at the index circle of the inner gear ring, the positioning is completed, then the clamping device is started to clamp the inner gear ring to be processed, after clamping, the elastic tooth device is reversed again and leaves the inner processing area of the inner gear ring, the gear shaping cutter of the gear shaping machine is started to begin the secondary gear shaping of the inner tooth.

[0015] Compared with the prior art, the beneficial effects of the present application are: the structure is reasonable, the inner gear ring for processing the reverse cone or milling the inner groove can be precisely positioned, the inner gear ring remains the same phase when needing to clamp the inner gear ring on the gear shaping machine for multiple times, the processing precision is improved, the waste rate is reduced, and it is beneficial to batch production; the manufacturing and processing cost is greatly reduced, the processing range of the numerical control gear shaping machine is expanded, and it is particularly suitable for processing products with large diameters, compared with the laser ranging tooth method, the mechanical elastic tooth device has higher reliability, low failure rate, low requirement for processing environment and convenient use. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 it is a perspective view of the twice clamping tooth positioning device for processing the inner gear ring in the embodiment; Figure 2 it is a front view of Figure 1 ; Figure 3 it is a structure schematic view of the positioning plate in Figure 2 ; Figure 4 it is a structure schematic view of the elastic tooth device in Figure 1 ; Figure 5 it is a structure schematic view of the gear shaping cutter in the embodiment.

[0017] In the figure: 1, base; 2, positioning plate; 3, positioning hole; 4, positioning pin; 5, rotating plate; 6, gear shaping cutter; 7, mounting sleeve; 8, positioning sleeve; 9, inner gear ring; 10, housing; 11, reversing plate; 12, fixed plate; 13, reversing cylinder; 14, vertical telescopic rod; 15, pressing block; 16, cylindrical measuring rod, 17, telescopic shaft; 18, spring; 19, pulling handle; 20, limit pin; 21, mounting plate. DETAILED DESCRIPTION The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0019] Embodiment 1 As Figures 1-5As shown, the embodiment proposes a positioning device for twice clamping and tooth positioning of a plug-cutting inner gear ring, which comprises a base 1, the base 1 is provided with a clamp, the clamp comprises a mounting plate 21, the mounting plate 21 is provided with a mounting sleeve 7, the outer circle of a positioning sleeve 8 is matched with the inner hole of the mounting sleeve 7 through a sliding bearing, so that the positioning sleeve 8 can be taken out from the mounting sleeve 7 flexibly, and the positioning sleeve 8 is matched with a resilient tooth positioning device; The resilient tooth positioning device comprises a shell 10, the shell 10 is provided with a telescopic shaft 17, the two ends of the telescopic shaft 17 are connected with a cylindrical measuring rod 16 and a pulling handle 19 respectively after extending out of the shell 10, the telescopic shaft 17 between the shell 10 and the pulling handle 19 is provided with a limiting pin 20, the telescopic shaft 17 in the shell 10 comprises two parts of a thick shaft and a thin shaft, one end of the thin shaft extends out of the shell 10 and is connected with the limiting pin 20, and a spring 18 is sleeved on the thin shaft, as Figure 4 As shown, under the elastic driving of the spring 18, the telescopic shaft 17 is located at the left limit position, and the cylindrical measuring rod 16 moves to the right side after being pressed by the inner tooth, the diameter of the cylindrical measuring rod 16 is selected through calculation, and the resilient tooth positioning device is accurately positioned at the tooth profile division circle position of the inner gear ring 9. By pulling the pulling handle 19, the limiting of the cylindrical measuring rod 16 to the inner gear ring 9 can be released.

[0020] The shell 10 is connected with a turnover assembly, the turnover assembly comprises a turnover plate 11 and a turnover cylinder 13, one end of the turnover plate 11 is connected with the shell 10, the other end of the turnover plate 11 is fixedly connected with a connecting shaft, the connecting shaft is rotatably connected with a fixed plate 12 through a bearing, the rotating shaft is connected with the turnover cylinder 13, and the fixed plate 12 is fixed on the mounting plate 21 through bolts.

[0021] The resilient tooth positioning device fully utilizes the special structure of the inner gear ring 9, that is, the effective tooth side left after the inner groove or tooth side of the inner gear ring 9 is processed in a reverse taper, the length of the cylindrical measuring rod 16 accounts for 80% of the length of the effective tooth side left, the cylindrical measuring rod 16 can fully contact the vicinity of the division circle of the inner gear ring 9, after the cylindrical measuring rod 16 driven by the spring 18 enters the tooth groove of the inner gear ring 9, through the sliding contact with the tooth side, the cylindrical measuring rod 16 is finally positioned against the tooth side at the division circle of the inner gear ring 9, so that the inner gear ring 9 of the product to be processed can be accurately fixed at the same phase every time. The outer circle of the positioning sleeve 8 is matched with the clamp through a sliding bearing, after the inner gear ring 9 of the product to be processed is put into the positioning sleeve 8, the inner hole of the positioning sleeve 8 is matched with the outer circle of the inner gear ring 9 of the product to be processed in a small gap, so that the inner gear ring 9 of the product to be processed can rotate freely under the driving of the resilient tooth positioning device, and the efficiency of the operator in installing and taking out the product in the production process is improved, so that the production and processing efficiency is improved.

[0022] The clamp is connected with the base 1 through a fine adjustment assembly, the fine adjustment assembly comprises a positioning plate 2 and a rotating plate 5, the positioning plate 2 is fixed on the base 1, and 21 positioning holes 3 are uniformly arranged on the positioning plate 2 in the circumferential direction, and the spacing between adjacent positioning holes 3 is 0.01 mm; the center of the rotating plate 5 is rotationally connected with the center of the positioning plate 2 through a bearing, the rotating plate is provided with a positioning pin 4 matched with the positioning hole 3, the mounting plate 21 is fixed on the rotating plate, and the fixed plate 12 is fixed on the mounting plate 21. After elastic tooth alignment, the positioning holes 3 uniformly distributed on the positioning plate 2 are used, the spacing of the positioning holes 3 is calculated, for example, the tooth thickness at the division circle of the workpiece inner gear ring 9 is 0.02 mm, that is, the tooth profile on one side is 0.01 mm, so that when it is found that there is a gap in the left and right tooth sides, the positioning pin 4 is pulled out to rotate the rotating plate to drive the workpiece inner gear ring 9 to rotate, and the adjustment of the machining allowance of the left and right tooth sides is realized by rotating the required number of holes, 1 hole spacing is 0.01 mm, 2 hole spacing is 0.02 mm, 3 hole spacing is 0.03 mm, and so on. When initially machining, the positioning pin 4 is inserted into the middle positioning hole 3 of the positioning plate 2, so that 10 positioning holes 3 are arranged on both sides of the middle positioning hole 3, that is, the right tooth surface of the inner gear ring 9 has a 0.01-0.1 mm fine adjustment function. After the rotating plate is rotated to the required positioning hole 3, the positioning pin 4 only needs to be inserted again, and the clamp is locked in the circumferential direction.

[0023] The positioning sleeve 8 is matched with a pressing device, the pressing device comprises a pressing block 15, a vertical telescopic rod 14 and a rotating device, one end of the pressing block 15 is matched with the positioning sleeve 8, the other end of the pressing block 15 is connected with the rotating device, the rotating device is connected with the telescopic end of the vertical telescopic rod 14, and the fixed end of the vertical telescopic rod 14 is fixed on the rotating plate 5. After the elastic tooth alignment device completes the tooth alignment positioning, the pressing device is started to press the workpiece inner gear ring 9, and after pressing, the elastic tooth alignment device is turned over through the turnover assembly, and is away from the inner machining area of the inner gear ring 9, and the gear cutting tool 6 is started to machine the inner gear ring 9. The vertical telescopic rod 14 is a hydraulic cylinder, and the rotating device is a 90° rotating air cylinder.

[0024] During operation, the internal gear ring 9 of the product to be processed is placed into the mounting sleeve 7 of the gear shaping machine after being inserted into the positioning sleeve 8. Then, the tilting cylinder 13 tilts the product to make the elastic tooth-aligning device tilt into the internal gear ring 9. At this time, the cylindrical measuring rod 16 slides into contact with the tooth side of the internal gear ring 9. The positioning sleeve 8 is rotated so that the cylindrical measuring rod 16 enters the tooth groove of the internal gear ring 9 under the elastic drive and abuts against the tooth side at the pitch circle of the internal gear ring 9 to complete the positioning. Then, the clamping device is activated to clamp the internal gear ring 9 of the product to be processed. Specifically, the 90° rotating cylinder drives the pressure plate to rotate so that one end of the pressure plate is above the internal gear ring 9 of the product to be processed. Then, the vertical telescopic rod 14 retracts and the pressure plate clamps the internal gear ring 9 of the product to be processed. The elastic tooth-aligning device tilts again and leaves the internal processing area of ​​the internal gear ring 9. The gear shaping cutter 6 of the gear shaping machine is activated to start the secondary internal gear shaping process.

[0025] Example 2 like Figures 1-5 As shown, the difference between this embodiment and embodiment 1 is that another basic task for internal gear machining after the internal gear ring is clamped for the second time is: when customizing the gear shaping cutter, a positioning keyway is added to the mounting hole of the gear shaping cutter to ensure that the relative position error between the tooth profile of each cutter and the internal gear keyway is controlled within 0.01 mm, so that different gear shaping cutters or re-grinding gear shaping cutters are still in the same phase when reinstalled, further improving the machining accuracy.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A positioning device for tooth alignment of a secondary clamping of an inserted toothed ring, comprising a base, a clamp is arranged on the base, characterized in that, The clamp is matched with a positioning sleeve through sliding bearings, and the positioning sleeve is matched with an elastic tooth matching device; The elastic tooth matching device comprises a shell, an extension shaft is arranged in the shell, the two ends of the extension shaft are connected with a cylindrical gauge bar and a drawing handle respectively after extending out of the shell, a limiting pin is arranged on the extension shaft between the shell and the drawing handle, the extension shaft in the shell comprises two parts of a rough shaft and a thin shaft, one end of the thin shaft extends out of the shell and is connected with the limiting pin, and a spring is sleeved on the thin shaft; The shell is connected with a turnover assembly, the turnover assembly comprises a turnover plate and a turnover cylinder, one end of the turnover plate is connected with the shell, the other end of the turnover plate is fixedly connected with a connecting shaft, the connecting shaft is rotatably connected with a fixed plate through a bearing, the rotating shaft is connected with the turnover cylinder, and the fixed plate is arranged on the clamp.

2. The device according to claim 1, wherein: The clamp comprises a mounting plate, a mounting sleeve is arranged on the mounting plate, and the outer circle of the positioning sleeve is matched with the inner hole of the mounting sleeve through sliding bearings.

3. The device according to claim 2, wherein: The clamp is connected with the base through a fine adjustment assembly, the fine adjustment assembly comprises a positioning plate and a rotating plate, the positioning plate is fixed on the base, a plurality of positioning holes are uniformly arranged on the positioning plate in the circumferential direction, the center of the rotating plate is rotatably connected with the center of the positioning plate through a bearing, a positioning pin matched with the positioning hole is arranged on the rotating plate, the mounting plate is fixed on the rotating plate, and the fixed plate is fixed on the mounting plate.

4. The device according to claim 3, wherein: The distance between adjacent positioning holes is 0.01mm.

5. The device according to claim 3, wherein: The positioning hole is provided with 21 positioning holes.

6. The device according to claim 1, wherein: The positioning sleeve is matched with a pressing device, the pressing device comprises a pressing block, a vertical extension rod and a rotating device, one end of the pressing block is matched with the positioning sleeve, the other end of the pressing block is connected with the rotating device, and the rotating device is connected with the extension end of the vertical extension rod.

7. The device according to claim 6, wherein: The vertical extension rod is a telescopic cylinder, an electric push rod or a hydraulic cylinder.

8. The device according to claim 6, wherein: The rotating device is a 90° rotating cylinder or a 90° rotating oil cylinder.

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