Odd-numbered teeth machining positioning and alignment composite device and machining method

Abstract

The present invention provides a composite device for positioning and aligning odd-numbered teeth, comprising a base plate, a stepped hole for placing a processing part in the middle of the base plate; a correction block installed on the stepped hole; a first correction part and a second correction part for engaging the processing part are provided at both ends of the correction block in the length direction; and the first correction part and the second correction part are both arranged toward the stepped hole; a fixing part is provided on the base plate and located at opposite ends of the stepped hole. The composite device fixes the processing part in the stepped hole by using the correction block and the fixing part, so that the secondary processing positioning and alignment of the odd-numbered teeth processing part are accurate, and the relative position is fixed, and the position accuracy of the odd-numbered teeth can be better guaranteed. The present invention also provides a method for processing internal and external teeth. When processing the second part and subsequent parts, the center starting point remains unchanged. It is only necessary to load the part and use the correction block to correct the inner tooth surface of the part, and the same part can be repeatedly processed, which effectively improves the processing efficiency of the part and ensures the production progress.

Description

Technical Field

[0001] The invention belongs to the technical field of free wheel part processing, and in particular relates to a composite device for positioning and aligning an odd number of teeth processing and a processing method. Background Art

[0002] The freewheel is an important part of the hydraulic transmission and an important transmission part. Generally, the freewheel has more internal teeth and fewer external teeth, and the number of internal and external teeth is even smaller if the number of teeth is odd. Figure 1 This is a schematic diagram of the size and structure of the inner and outer odd-numbered freewheel parts. The part has 13 teeth in total, which are odd-numbered and evenly distributed around the circumference. In order to ensure the inner and outer structure of the part and the mechanical properties of the workpiece surface at the tooth position, the part needs to be fine-finished for the outer circle and two planes, inner and outer teeth, etc. after the initial rough machining of the inner and outer circles, semi-finishing of the inner teeth, carburizing, removal of the matrix carburized layer, and heat treatment.

[0003] Due to the different hardness requirements of the internal and external tooth profiles and the base of the parts, the parts need to undergo two different heat treatments. First, the internal teeth are rough-machined and then heat-treated. After reaching the hardness requirements, they are fine-machined. The position requirements of the external and internal teeth require one clamping process. Since the internal teeth are an odd number, they need to be aligned and positioned again. If the processing method is improper during the processing, it is easy to produce defective products, especially the positioning and alignment in the secondary finishing, which has a great impact on the dimensional accuracy and geometric tolerance of the parts. Summary of the invention

[0004] In order to solve the above problems, the present invention aims to provide a composite device for positioning and aligning an odd-numbered tooth processing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A composite device for positioning and aligning an odd number of teeth, comprising a bottom plate, wherein a stepped hole for placing a processing part is provided in the middle of the bottom plate;

[0007] A correction block is installed on the step hole; a first correction part and a second correction part for engaging the processed parts are arranged at both ends of the correction block in the length direction; and the first correction part and the second correction part are both arranged toward the step hole;

[0008] The fixing member is arranged on the bottom plate and located at two opposite ends of the step hole.

[0009] Preferably, the first correction portion is engaged in adjacent tooth grooves of the processed part; it comprises a first bevel groove and a second bevel groove symmetrically arranged on the correction block.

[0010] Preferably, the outer diameter of the second correction portion matches the inner diameter of the tooth groove of the machined part.

[0011] Preferably, the base plate, fixing parts and correction blocks are all made of 45 steel.

[0012] Preferably, the base plate, the fixing part and the correction block are respectively heat-treated and tempered to HRC32-36.

[0013] Preferably, the fixing member includes a pad arranged on the base plate relative to the base plate, a pressing plate arranged on the pad plate for pressing the processed parts, and a clamping screw for fixing the pad and the pressing plate to the base plate.

[0014] Preferably, a threaded hole matched with the clamping screw is provided on the bottom plate; and the threaded hole is arranged close to the stepped hole.

[0015] A method for machining internal and external gears, using the above-mentioned positioning and alignment composite device to fix the machining parts for machining, comprises the following steps:

[0016] Step 1: Fix the composite device, calibrate and fix the base plate on the workbench, and find the center of the step hole through the molybdenum wire on the machine tool;

[0017] Step 2: Install the processed parts, put the processed parts into the step hole, and insert the correction block into any tooth groove of the inner teeth of the processed parts, and straighten the correction block; use the fixing parts to fix the processed parts on the bottom plate;

[0018] Step 3: Finish cutting the inner teeth of the parts, starting from the center; after the processing is completed, remove the molybdenum wire;

[0019] Step 4: Fine cutting of external teeth, move the molybdenum wire through the wire hole on the processed part, set the starting point coordinates, and then fine cut the external teeth;

[0020] Step 5: After finishing the external gear cutting, move the processed molybdenum wire to the center of the step hole, loosen the fixings, and remove the processed parts;

[0021] Step 6: Repeat steps 2-5 to finish cutting other processed parts.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The present invention provides a composite device for positioning and aligning odd-numbered teeth processing. By using a correction block and a fixing part to fix the processing parts in a step hole, the secondary processing positioning and alignment of the internal and external odd-numbered teeth processing parts are accurate, and the relative position is fixed, and the position accuracy of the internal and external odd-numbered teeth can be better guaranteed.

[0024] The present invention also provides a method for processing internal and external teeth. When processing the second part and subsequent parts, the center starting point remains unchanged and there is no need to find the center again. The part only needs to be loaded and the internal tooth surface of the part is corrected with a correction block. The same part can be repeatedly processed, which effectively improves the processing efficiency of the parts and ensures production progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the structure of the inner and outer odd-numbered teeth freewheel parts;

[0027] Figure 2 It is a structural schematic diagram of a composite device for positioning and aligning an odd number of teeth in the present invention;

[0028] Figure 3 It is a structural schematic diagram of the bottom plate of the present invention;

[0029] Figure 4 for Figure 3 A cross-sectional view of

[0030] Figure 5 It is a structural schematic diagram of the correction block in the present invention;

[0031] Figure markings: 1-processed parts, 11-threading hole, 2-bottom plate, 21-step hole, 211-first through hole, 212-second through hole, 22-threaded hole, 3-correction block, 31-first correction part, 311-first inclined groove, 312-second inclined groove, 32-second correction part, 4-fixing part, 41-spacer, 42-pressure plate, 43-tensioning screw. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0033] Combined with reference Figures 1 to 5 The present invention discloses an odd-numbered-tooth processing positioning and alignment composite device. When processing internal and external odd-numbered-tooth freewheels, the composite device can be used to make the positioning, alignment and clamping process of the freewheel parts simple and quick, and the processing quality can be better guaranteed.

[0034] The composite device includes a base plate 2. In the present embodiment, the base plate 2 is configured to be rectangular. A stepped hole 21 for placing the processing part 1 is opened in the middle of the base plate 2. In the present embodiment, the stepped hole 21 is a first through hole 211 and a second through hole 212 with inconsistent inner diameters. The inner diameter of the first through hole 211 is larger than the inner diameter of the second through hole 212, and the first through hole 211 extends from the top to the bottom of the base plate 2, and the second through hole 212 is arranged at the bottom of the first through hole 211. The processing part 1 is placed in the first through hole 211.

[0035] The correction block 3 is mounted on the step hole 21, that is, located on the top of the bottom plate 2; the length of the correction block 3 is not less than the diameter of the first through hole 211. In this embodiment, the length of the correction block 3 is equal to the diameter of the first through hole 211. A first correction portion 31 and a second correction portion 32 for engaging the processing part 1 are provided at both ends of the length direction of the correction block 3; and the first correction portion 31 and the second correction portion 32 are both arranged toward the step hole 21; the first correction portion 31 is engaged in the adjacent tooth groove of the processing part 1; it includes a first bevel groove 311 and a second bevel groove 312 symmetrically arranged on the correction block 3. The outer diameter of the second correction portion 32 matches the inner diameter of the tooth groove of the processing part 1. Since the part processed by the composite device has an odd number of teeth, when in use, the correction block 3 is placed along the diameter of the step hole 21, and the first correction part 31 is engaged in the adjacent tooth groove of the processed part 1 at one end of the diameter of the step hole 21, and the second correction part 32 is engaged in the tooth groove of the processed part 1 at the other end of the diameter of the step hole 21. In this way, the processed part 1 can be corrected by straightening the correction block 3.

[0036] The fixing member 4 is provided on the bottom plate 2 and is located at two opposite ends of the step hole 21. In this embodiment, the fixing member 4 is provided at two ends of the length direction of the bottom plate 2 and is arranged close to the step hole 21. The fixing member 4 includes a pad 41 arranged on the bottom plate 2, a pressing plate 42 arranged on the pad for pressing the processed part 1, and a clamping screw 43 for fixing the pad 41 and the pressing plate 42 on the bottom plate 2. A threaded hole 22 is provided on the bottom plate 2 to match the clamping screw 43; and the threaded hole 22 is arranged close to the step hole 21.

[0037] The bottom plate 2, the backing plate, the pressing plate 42, the clamping screw 43 and the correction block 3 are all made of 45 steel. The bottom plate 2, the backing plate, the pressing plate 42, the clamping screw 43 and the correction block 3 are heat-treated and tempered to HRC32-36.

[0038] The present invention also provides a method for machining internal and external teeth, using the above-mentioned positioning and alignment composite device to fix the machining part 1 for machining, comprising the following steps:

[0039] Step 1: Fix the composite device, calibrate and fix the base plate 2 on the workbench, and use the molybdenum wire on the machine tool to find the center of the step hole 21. This center is the center of the internal and external gear parts to be machined;

[0040] Step 2: Install the processing part 1, put the processing part 1 into the step hole 21, and insert the correction block 3 into any tooth groove of the inner teeth of the processing part 1, and straighten the correction block 3; use the pad, the pressure plate 42, and the clamping screw 43 to fix the processing part 1 on the bottom plate 2;

[0041] Step 3: Precision cutting the inner teeth of the processed part 1, and precision cutting the inner teeth of the processed part 1 from the center starting point; after the processing is completed, the composite device and the processed part 1 do not move, and the processing molybdenum wire is removed;

[0042] Step 4: Fine cutting of external teeth: move the molybdenum wire through the wire hole 11 on the processed part 1, set the starting point coordinates, and then fine cut the external teeth;

[0043] Step 5: After finishing the external gear cutting, move the processed molybdenum wire to the center of the step hole 21, loosen the fixing piece 4, and remove the processed part 1;

[0044] Step 6: Repeat steps 2-5 to finish cutting other processed parts 1.

[0045] The present invention provides a composite device for positioning and aligning odd-numbered teeth processing. By using a correction block 3 and a fixing member 4, a processing part 1 is fixed in a stepped hole 21, so that the secondary processing positioning and alignment of the internal and external odd-numbered teeth processing part 1 are accurate, and the relative position is fixed, and the position accuracy of the internal and external odd-numbered teeth can be better guaranteed.

[0046] The present invention also provides a method for processing internal and external teeth. When processing the second part 1 and subsequent parts 1, the center starting point remains unchanged and there is no need to find the center again. The part only needs to be loaded and the internal tooth surface of the part is corrected with the correction block 3. The same part can be repeatedly processed, which effectively improves the processing efficiency of the parts and ensures the production progress.

[0047] The above is a detailed introduction to an odd-numbered tooth processing positioning and alignment composite device and processing method provided by the present invention. This article uses specific examples to illustrate the structure and working principle of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A composite device for positioning and aligning an odd number of teeth, characterized in that: It comprises a bottom plate (2), wherein a stepped hole (21) for placing a processed part (1) is provided in the middle of the bottom plate (2); A correction block (3) is mounted on the stepped hole (21); a first correction portion (31) and a second correction portion (32) for engaging the processed part (1) are provided at both ends of the correction block (3) in the length direction; and the first correction portion (31) and the second correction portion (32) are both arranged toward the stepped hole (21); A fixing member (4) is provided on the bottom plate (2) and is located at two opposite ends of the step hole (21); The first correction portion (31) is engaged in adjacent tooth grooves of the processed part (1); it comprises a first inclined surface groove (311) and a second inclined surface groove (312) symmetrically arranged on the correction block (3); The outer diameter of the second correction portion (32) matches the inner diameter of the tooth groove of the processed part (1); The step hole (21) comprises a first through hole (211) and a second through hole (212) having inconsistent inner diameters, and the inner diameter of the first through hole (211) is greater than the inner diameter of the second through hole (212); The length of the correction block (3) is equal to the diameter of the first through hole (211); The correction block (3) is placed along the diameter of the step hole (21).

2. The odd-numbered teeth machining positioning and alignment composite device according to claim 1, characterized in that: The base plate (2), the fixing member (4) and the correction block (3) are all made of 45 steel.

3. The odd-numbered teeth machining positioning and alignment composite device according to claim 2, characterized in that: The base plate (2), the fixing member (4) and the correction block (3) are respectively subjected to heat treatment and tempered to HRC 32-36.

4. A composite device for positioning and aligning an odd number of teeth according to any one of claims 1 to 3, characterized in that: The fixing member (4) comprises a cushion block (41) arranged on the base plate (2), a pressing plate (42) arranged on the cushion plate for pressing the processed part (1), and a pressing screw (43) for fixing the cushion block (41) and the pressing plate (42) on the base plate (2).

5. The odd-numbered teeth machining positioning and alignment composite device according to claim 4, characterized in that: A threaded hole (22) matched with the clamping screw (43) is provided on the bottom plate (2); and the threaded hole (22) is arranged close to the step hole (21).

6. A method for machining internal and external gears, using the positioning and alignment composite device according to any one of claims 1 to 5 to fix a machining part (1) for machining, characterized in that: The steps include: Step 1: Fix the composite device, calibrate and fix the base plate (2) on the workbench, and find the center of the step hole (21) by the molybdenum wire on the machine tool; Step 2: Install the processing part (1), place the processing part (1) into the stepped hole (21), and insert the correction block (3) into any tooth groove of the inner teeth of the processing part (1), and align the correction block (3); use the fixing member (4) to fix the processing part (1) on the base plate (2); Step 3: Precision cutting the inner teeth of the processed part (1), and precision cutting the inner teeth of the processed part (1) from the center. After the processing is completed, remove the processed molybdenum wire; Step 4: Fine cutting of the external teeth: move the molybdenum wire through the wire threading hole (11) on the workpiece (1), set the starting point coordinates, and then fine cut the external teeth; Step 5: After finishing the external gear cutting, move the processing molybdenum wire to the center of the step hole (21), loosen the fixing piece (4), and remove the processed part (1); Step 6: Repeat steps 2-5 to finish cutting other processed parts (1).

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