Mechanical secondary tool setting device for gear hobbing machine

Abstract

The invention belongs to the field of gear machining, and relates to a mechanical secondary tool setting device for a gear hobbing machine, which is used for carrying out secondary machining on a gear, a worm gear and a helical gear machined by the gear hobbing machine after being detached to align the original positions. The device comprises a shaft sleeve bracket (1), a horizontal adjusting rod (2), a pressure-sensitive probe (3), an adjusting rod fixing bolt (4), a probe fixing screw (5) and a bracket fixing bolt (6), the shaft sleeve support (1) is arranged on a gear hobbing machine main shaft (7) of a gear hobbing machine in a penetrating mode, the shaft sleeve support (1) and the gear hobbing machine main shaft (7) are fixed, a machined part (9) and the gear hobbing machine main shaft (7) are connected and fixed, the horizontal adjusting rod (2) is fixed to the shaft sleeve support (1), and the pressure sensing type probe (3) downwards penetrates through a through hole of the horizontal adjusting rod (2) to make contact with the machined part (9). And the pressure-sensitive probe (3) is fixed on the horizontal adjusting rod (2) through a probe fixing screw (5). The tool setting device is suitable for secondary machining tool setting of the gear.

Description

Technical Field

[0001] The invention belongs to the field of gear processing and relates to a mechanical secondary tool setting device for a gear hobbing machine. Background Art

[0002] A gear hobbing machine is a machine tool that uses the generating method to process gears. The gear cutter and the workpiece to be cut are driven by each other in a way that there is no meshing gap. Once the cutting action begins, the cutter and the workpiece to be cut must be forced to mesh and drive in strict accordance with the transmission ratio between the two, and the required involute tooth profile is cut by hobbing. Traditional gear hobbing machines do not have the ability to perform secondary tool setting and post-processing on parts of the same size. They need to rely on manual experience and visually locate the workpiece position. While relying heavily on personnel experience, the product qualification rate is difficult to guarantee, and the processing efficiency and accuracy cannot be guaranteed. The size of the processed parts cannot be guaranteed without relying on a gear grinding machine. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a mechanical secondary tool setting device for a gear hobbing machine, which can perform secondary processing on gears, worm wheels and helical gears processed by the gear hobbing machine to align their original positions after disassembly.

[0004] The technical solution of the present invention is:

[0005] A mechanical secondary tool setting device for a gear hobbing machine, comprising:

[0006] Axle sleeve bracket 1, horizontal adjustment rod 2, pressure-sensitive probe 3, adjustment rod fixing bolt 4, probe fixing screw 5, bracket fixing bolt 6;

[0007] The sleeve bracket 1 is passed through the gear hobbing machine spindle 7 of the gear hobbing machine, the sleeve bracket 1 is fixed to the gear hobbing machine spindle 7, the workpiece 9 is connected and fixed to the gear hobbing machine spindle 7, the horizontal adjustment rod 2 is fixed to the sleeve bracket 1, the pressure-sensitive probe 3 passes downward through the through hole of the horizontal adjustment rod 2 and contacts the workpiece 9, and the pressure-sensitive probe 3 is fixed to the horizontal adjustment rod 2 by the probe fixing screw 5.

[0008] Use the bracket fixing bolts 6 to fix the sleeve bracket 1 to the gear hobbing machine spindle 7.

[0009] The workpiece 9 is connected and fixed to the main shaft 7 of the gear hobbing machine through a sleeve 8.

[0010] Use the adjusting rod fixing bolt 4 to fix the horizontal adjusting rod 2 to the shaft sleeve bracket 1.

[0011] The pressure-sensitive probe 3 has a built-in contact signal light.

[0012] The diameter of the spherical needle at the end of the pressure-sensitive probe 3 is selected according to the diameter of the measuring tool when measuring the common normal length of the processed part 9.

[0013] Before disassembling the processed part 9 on the gear hobbing machine, the probe of the pressure-sensitive probe 3 is passed through the through hole of the horizontal adjustment rod 2. By adjusting the up and down height, the contact critical point with the tooth groove position of the measured part is found. The alignment of this critical point relies on the feedback of the contact signal light provided by the pressure-sensitive probe 3.

[0014] After the position is determined, disassemble the processed part 9, measure the actual value and conduct trial assembly. After reassembly, reselect any tooth groove position, contact it with the fixed pressure-sensitive probe 3, rotate clockwise and counterclockwise, and make sure that the left and right tooth surfaces are in contact with the front spherical needle head of the pressure-sensitive probe 3. After the indicator light feedback, the installation is completed, the secondary tool position is confirmed, and the secondary processing begins.

[0015] The beneficial effects of the present application are as follows: the present invention can realize the secondary tool setting function of the gear hobbing machine, effectively reduce or even eliminate the amount of waste caused by re-setting the tool for spur gears, helical gears and turbines after the first processing. For a part that has been processed and needs to be processed again for the second time and the original position is not recorded, the position of a test piece can be recorded by this device, and then the processed test piece can be clamped according to the position, and the longitudinal height of the pressure-sensitive probe can be slightly adjusted to perform additional processing. The actual measurement shows that the effect of this device is excellent, and the accuracy can be guaranteed to be about 0.005mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] Figure 2 It is a front view and a centering schematic diagram of the present invention.

[0018] Figure 3 It is an isometric view of the overall installation of the present invention. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with the accompanying drawings of the embodiments.

[0020] Figure 1 It is a structural schematic diagram of the secondary processing tool setting device, wherein part 1 is a sleeve bracket, which is sleeved on the main shaft of the gear hobbing machine. After the position is fixed, it is fixed at two points using the bracket fixing bolts of part 6. Part 2 is a horizontal adjustment rod, which can pass through part 1 to adjust the horizontal position. Part 3 is a pressure-sensitive probe. After passing through the through hole on part 2, the horizontal adjustment ability of part 2 is relied on to ensure that the spherical needle head at the end of the probe is aligned with the center line of the tooth thickness of the gear or worm wheel being measured. After the position is determined, the horizontal position of part 2 is locked by the bolt of part 4. Part 3 can adjust the up and down height in the vertical direction. After the position is determined, it is locked with the screw of part 5.

[0021] Figure 2The side view of the secondary machining tool setting device is shown. From the side view, it can be seen that after the pressure-sensitive probe of part 3 is adjusted up and down, the spherical needle head at the end of part 3 can be embedded in the middle position between the two teeth. The position before disassembly is recorded by the left and right swing of the measured gear, the up and down adjustment of the probe and the feedback of the indicator light on the probe. During the secondary machining, the secondary clamping and positioning can be completed by reinstalling it in the original position.

[0022] Figure 3 The isometric view of the secondary processing tool setting device is shown, which can intuitively reflect the installation relationship and adjustment direction of each part.

[0023] The device is used to perform secondary processing on gears, worm gears and bevel gears processed by gear hobbing machines to align their original positions after disassembly, so as to avoid the problem of scrapping the first piece or the parts after disassembly due to unqualified dimensions of the parts processed by traditional gear hobbing machines, giving the gear hobbing machine a larger adjustment space and the ability to ensure the qualified rate of parts.

[0024] Embodiments of the present invention Figure 1 , 2 , 3, including: a sleeve bracket 1, a horizontal adjustment rod 2, a pressure-sensitive probe 3, an adjustment rod fixing bolt 4, a probe fixing screw 5, and a bracket fixing bolt 6. The sleeve bracket 1 is passed through the gear hobbing machine spindle 7 of the gear hobbing machine, and the sleeve bracket 1 is fixed to the gear hobbing machine spindle 7 using the bracket fixing bolt 6. The workpiece 9 is connected and fixed to the gear hobbing machine spindle 7 through the sleeve 8. Before disassembly, the workpiece 9 on the gear hobbing machine is kept in place, and the gear hobbing machine spindle 7 and the tool are not rotated. At this time, the horizontal adjustment rod 2 is passed through the matching hole on the sleeve bracket 1, and the through hole on the horizontal adjustment rod 2 through the pressure-sensitive probe 3 has sufficient contact space with the workpiece 9 within the tooth thickness range, and do not touch the edge. Use the adjustment rod fixing bolt 4 to fix the horizontal adjustment rod 2 to the sleeve On the bracket 1, the measuring needle of the pressure-sensitive probe 3 is passed through the through hole of the horizontal adjustment rod 2, and the critical point of contact with the tooth groove position of the measured part is found by adjusting the up and down height. The alignment of this critical point relies on the feedback of the contact signal light provided by the pressure-sensitive probe 3, and the diameter of the spherical needle head at the end of the pressure-sensitive probe 3 needs to be selected according to the diameter of the measuring tool when measuring the normal length (W value) of the processed part 9 gear, worm gear, and bevel gear, which can better ensure the good contact between the pressure-sensitive probe and the measured part. After finding the gear center diameter and determining the position, use the probe fixing screw to fix the pressure-sensitive probe to the horizontal adjustment rod.

[0025] After the position of the entire device is determined, disassemble the measured parts, perform actual value measurement and trial assembly, and re-select any tooth groove position after reassembly to contact the fixed pressure-sensitive probe. Rotate clockwise and counterclockwise to make sure that both left and right tooth surfaces are in contact with the front spherical needle head of the pressure-sensitive probe. After the indicator light feedback, the installation is completed, the secondary tool position is confirmed, and the secondary processing begins.

[0026] If the machined part is a helical gear, higher requirements are placed on the installation position of the tooling and the part being measured. Under the condition of good consistency of the parts, the horizontal installation position of the parts is required to be accurate, and the contact position of the pressure-sensitive probe is as close to the center of the tooth thickness as possible.

[0027] The front end of the pressure-sensitive probe needs to be a spherical needle, and the needle can be calculated according to the parameters of different gears, and the spherical size is determined according to the diameter of the measuring rod required when measuring the W value.

[0028] The material of the spherical needle head at the front end of the pressure-sensitive probe needs to be ruby ​​silicon nitride to reduce deformation and wear while ensuring measurement accuracy.

[0029] The original position recording method needs to find the recording position that can contact the two tooth surfaces at the same time in combination with the diameter of the spherical needle head, and the feedback of the indicator light of the pressure-sensitive probe shall prevail. The indicator light can be turned on by lightly touching the probe.

[0030] The plane at the end of the adjusting rod bolt must be perpendicular to the thread; the end of the probe fixing screw must be an arc surface, and the diameter of the arc surface is the same as the diameter of the pressure-sensitive probe in contact; the end of the bracket fixing bolt must be an arc surface, and the arc surface bracket has the same diameter as the contacting gear hobbing machine spindle.

[0031] The horizontal and longitudinal movements of the horizontal adjustment rod and the pressure-sensitive probe can be adjusted by a micro motor to automatically find the contact position.

[0032] If the tooth top of the measured part is aligned with the probe, the gear hobbing machine spindle and the gear hobbing tool can be linked to slightly rotate to ensure that the pressure-sensitive probe can directly fall into the tooth groove position.

[0033] The device has horizontal and vertical adjustment capabilities.

[0034] The invention can be widely applied to other gear processing equipment with a main shaft. After the size of the shaft sleeve bracket (1) is matched with the main shaft of the equipment, the position of the processed gear can be positioned to complete the secondary clamping and positioning.

[0035] The invention has been manufactured and applied in batch production, and has achieved good results. The invention can effectively reduce or even eliminate the waste generated by the secondary processing due to the failure of the first tool setting. It is used in the processing in the scientific research stage, the secondary tool setting in batch production, the size adjustment of parts and other links. At the same time, it can be compatible with various forms of gear hobbing machine parts such as spur gears, helical gears, worm gears, etc. for secondary tool setting, which reduces the waste generated in the gear hobbing process and improves the pass rate.

Claims

1. A mechanical secondary tool setting device for a gear hobbing machine, characterized in that: include: Axle sleeve bracket (1), a horizontal adjustment rod (2), a pressure-sensitive probe (3), an adjustment rod fixing bolt (4), a probe fixing screw (5), and a bracket fixing bolt (6); The shaft sleeve bracket (1) is passed through the gear hobbing machine spindle (7) of the gear hobbing machine, the shaft sleeve bracket (1) is fixed to the gear hobbing machine spindle (7), the workpiece (9) is connected and fixed to the gear hobbing machine spindle (7), the horizontal adjustment rod (2) is fixed to the shaft sleeve bracket (1), the pressure-sensitive probe (3) is passed downward through the through hole of the horizontal adjustment rod (2) to contact the workpiece (9), and the pressure-sensitive probe (3) is fixed to the horizontal adjustment rod (2) by the probe fixing screw (5).

2. A mechanical secondary tool setting device for a gear hobbing machine as claimed in claim 1, characterized in that: Use the bracket fixing bolts (6) to fix the sleeve bracket (1) to the gear hobbing machine spindle (7).

3. A mechanical secondary tool setting device for a gear hobbing machine as claimed in claim 1, characterized in that: The processed part (9) is connected and fixed to the main shaft (7) of the gear hobbing machine via a clamping sleeve (8).

4. A mechanical secondary tool setting device for a gear hobbing machine as claimed in claim 1, characterized in that: Use the rod fixing bolts (4) to secure the horizontal adjustment rod (2) to the sleeve bracket (1).

5. A mechanical secondary tool setting device for a gear hobbing machine as claimed in claim 1, characterized in that: The pressure-sensitive probe (3) has a built-in contact signal light.

6. A mechanical secondary tool setting device for a gear hobbing machine as claimed in claim 1, characterized in that: The diameter of the spherical needle at the end of the pressure-sensitive probe (3) is selected according to the diameter of the measuring tool when measuring the normal length of the processed part (9).

7. A mechanical secondary tool setting device for a gear hobbing machine as claimed in claim 6, characterized in that: Before disassembling the workpiece (9) on the gear hobbing machine, the probe of the pressure-sensitive probe (3) is passed through the through hole of the horizontal adjustment rod (2), and the contact critical point with the tooth groove position of the workpiece is found by adjusting the up and down height. The alignment of the critical point relies on the feedback of the contact signal light provided by the pressure-sensitive probe (3).

8. A mechanical secondary tool setting device for a gear hobbing machine as claimed in claim 7, characterized in that: After the position is determined, the processed part (9) is disassembled, and the actual value measurement and trial assembly are carried out. After reassembly, any tooth groove position is reselected, and it is contacted with the fixed pressure-sensitive probe (3). It is rotated clockwise and counterclockwise to ensure that the left and right tooth surfaces are in contact with the front spherical needle head of the pressure-sensitive probe (3). After the indicator light feedback, the installation is completed, the secondary tool position is confirmed, and the secondary processing begins.

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