Positioning and clamping device for secondary keyway milling of shaft parts

Abstract

The utility model discloses a positioning and clamping device for secondary keyway milling of shaft parts, which comprises a base, and two ends of the base are connected with a driving mechanism and a tailstock; a tip A is connected to the driving mechanism, a tip B concentric with the tip A is connected to the tailstock, and a rotating part is connected to the tip A; the base between the driving mechanism and the tailstock is connected with a supporting mechanism, and the side part of the supporting mechanism is connected with a clamping mechanism; the positioning mechanism is connected to the base and comprises a lifting part, and a positioning pin is connected to the lifting part. Compared with the prior art, the shaft workpiece is placed between the two tips with the key groove facing upwards, the positioning pin extends into the key groove for primary positioning, the position of the key groove is detected by means of a probe in the prior art, the clamp spindle box is driven by the servo motor, the radial position of the shaft workpiece is adjusted, and therefore secondary positioning is carried out. And therefore, the accuracy of the secondary machining size of the key groove is ensured, and the product quality is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to fixture technical field especially relates to a kind of secondary milling keyway positioning clamping device of shaft parts. BACKGROUND

[0002] Under the condition that keyway has been processed on the outer circle of shaft part and after heat treatment, when milling keyway again, accurate positioning cannot be realized.

[0003] In prior art, mechanical tool setting is used, and the machining error generated under the condition that keyway is deformed by heat treatment cannot be eliminated, after milling keyway, the hardening layer of keyway wall is uneven, not wear-resistant, and the symmetry of keyway is poor; in addition, mechanical tool setting is manually fed by hand, and is observed by visual observation to prevent tool collision, and under the processing mode of one person operating multiple machines, automation is low, and labor is consumed. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of secondary milling keyway positioning clamping device of shaft part, and the shaft workpiece keyway is placed between two centers with the top up, positioning pin is inserted into keyway to position once, the position of keyway is detected by the probe in prior art, and the radial position of shaft workpiece is adjusted by servo motor driving clamp spindle box, to position twice, to ensure the accuracy of keyway secondary processing size, ensure product quality, to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of secondary milling keyway positioning clamping device of shaft part, including base, the both ends of base are connected with driving mechanism and tailstock;Driving mechanism is connected with center A, tailstock is connected with the center B concentric with center A, center A is connected with the rotating part with;Driving mechanism and tailstock are connected with support mechanism on the base between, the side of support mechanism is connected with clamping mechanism;It also includes positioning mechanism connected to base, and the positioning mechanism includes lifting piece, and positioning pin is connected to lifting piece.

[0007] Further improvement scheme of the utility model is that driving mechanism includes clamp spindle box connected to base, and servo motor is driven and connected to clamp spindle box;Center A is the center with elasticity, and the shell of center A is connected to the flange plate of clamp spindle box.

[0008] Further improvement scheme of the utility model is that rotating part includes round sleeve, and round sleeve is connected to the center body of center A, the end of round sleeve is provided with a plurality of integrally formed occlusal teeth, and occlusal teeth are distributed in annular array.

[0009] The further improved scheme of the utility model discloses, the support mechanism includes two supports that are connected side by parallel on the base, and the support is located between the driving mechanism and tailstock, and the support is connected with the predetermined position V-shaped block.

[0010] The further improved scheme of the utility model discloses, the clamping mechanism includes the first oil cylinder that is connected between two supports, and the first oil cylinder is vertically arranged, and the power output end of the first oil cylinder is connected with the clamping block of V type.

[0011] The further improved scheme of the utility model discloses, the base on the side of the first oil cylinder is connected with the second oil cylinder, and the second oil cylinder is the 90 ° angle oil cylinder, and the power output end of the second oil cylinder is connected with the pressing plate.

[0012] The further improved scheme of the utility model discloses, the lifting piece is the third oil cylinder, and the third oil cylinder is the 90 ° angle oil cylinder, and the base is connected on the third oil cylinder;The base is connected with the sliding sleeve, and the positioning pin is slidably fitted in the sliding sleeve, and the spring is connected between the positioning pin and the sliding sleeve, and the bottom end of the positioning pin is in the shape of a hemisphere.

[0013] The further improved scheme of the utility model discloses, the tailstock is the automatic tailstock of hydraulic drive.

[0014] The further improved scheme of the utility model discloses, the rotating piece includes a round sleeve, and the round sleeve is connected to the top pin body of the top pin A, and a plurality of embedding grooves are formed in the end of the round sleeve, and the engagement teeth are in interference fit in the embedding grooves, and the engagement teeth are arranged in a ring array.

[0015] The utility model discloses the beneficial effect that:

[0016] The shaft piece secondary keyway milling positioning and clamping device places the shaft piece keyway upwards between two top pins, and the positioning pin is inserted into the keyway to position once, and the keyway position is detected by means of the probe in the prior art, and the radial position of the shaft workpiece is adjusted by the servo motor driven clamp spindle box, thereby positioning twice, and the accuracy of secondary processing size of the keyway is ensured, the product quality is ensured, and the secondary processing of the keyway of different size parameters on the shaft piece of different sizes is adapted.

[0017] The shaft piece secondary keyway milling positioning and clamping device is simple in structure, convenient to clamp, and greatly improves work efficiency.

[0018] The shaft piece secondary keyway milling positioning and clamping device further ensures the accuracy of keyway processing by clamping the shaft piece through the clamping block and the pressing plate when processing the keyway.

[0019] The shaft piece secondary keyway milling positioning and clamping device is detachable between the engagement teeth and the round sleeve, the engagement teeth can be replaced regularly, the round sleeve does not need to be replaced, and the use cost is reduced. DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the structure with the rotating component in Example 1.

[0023] Figure 4 This is a schematic diagram of the structure with the rotating component in Example 2.

[0024] Figure 5 This is a schematic diagram of the present invention in its working state.

[0025] In the diagram: 1-base, 2-drive mechanism, 201-clamp spindle box, 202-servo motor, 3-tailstock, 4-center A, 5-center B, 6-rotating component, 601-round sleeve, 602-engaging teeth, 7-support mechanism, 701-support, 702-pre-positioning V-block, 8-clamping mechanism, 801-first cylinder, 802-clamping block, 803-second cylinder, 804-pressure plate, 9-positioning mechanism, 901-positioning pin, 902-third cylinder, 903-sliding sleeve, 10-shaft component, 1001-keyway. Detailed Implementation

[0026] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1: As Figures 1 to 4 As shown, a positioning and clamping device for secondary milling of keyways on shaft components includes a base 1, with a drive mechanism 2 and a tailstock 3 connected to both ends of the base 1; a center A4 is connected to the drive mechanism 2, and a center B5 concentric with the center A4 is connected to the tailstock 3; a rotating component 6 is connected to the center A4; a support mechanism 7 is connected to the base 1 between the drive mechanism 2 and the tailstock 3, and a clamping mechanism 8 is connected to the side of the support mechanism 7; it also includes a positioning mechanism 9 connected to the base 1, the positioning mechanism 9 including a lifting component, and a positioning pin 901 connected to the lifting component.

[0028] The drive mechanism 2 includes a fixture spindle box 201 connected to the base 1, and a servo motor 202 connected to the fixture spindle box 201; the tip A4 is a flexible tip, and the housing of the tip A4 is connected to the flange of the fixture spindle box 201.

[0029] The rotating component 6 includes a circular sleeve 601, which is connected to the tip body of the tip A4. The end of the circular sleeve 601 is provided with several integrally formed engagement teeth 602, and the engagement teeth 602 are distributed in a ring array.

[0030] Supporting mechanism 7 includes two supports 701 connected to base 1 side by side, supports 701 are located between driving mechanism 2 and tailstock 3, and supports 701 are connected with pre-positioning V-shaped block 702.

[0031] Clamping mechanism 8 includes first oil cylinder 801 connected between two supports 701, first oil cylinder 801 is vertically arranged, and the power output end of first oil cylinder 801 is connected with V-shaped clamping block 802.

[0032] Second oil cylinder 803 is connected to the side of first oil cylinder 801 base 1, second oil cylinder 803 is a 90° angle oil cylinder, and the power output end of second oil cylinder 803 is connected with pressing plate 804.

[0033] The lifting part is a third oil cylinder 902, the third oil cylinder 902 is a 90° angle oil cylinder, the third oil cylinder 902 is connected with a base; the base is connected with a sliding sleeve 903, the positioning pin 901 is slidingly fitted in the sliding sleeve 903, the positioning pin 901 and the sliding sleeve 903 are connected with a spring, and the bottom end of the positioning pin 901 is in a hemispherical shape.

[0034] Tailstock 3 is a hydraulic-driven automatic tailstock 3. In this embodiment, top pin A4 is a flexible top pin, and the top pin body of top pin A4 can only contract along the axis in the shell of top pin A4 and cannot rotate radially; top pin B5 is a live top pin.

[0035] Embodiment 2: The embodiment is a further improvement of embodiment 1, and the main improvement is that in embodiment 1, the engagement teeth 602 are integrally formed with the round sleeve 601, and after the engagement teeth 602 are worn out, the whole belt rotating part 6 is scrapped; and in this embodiment, the above defects can be avoided, specifically:

[0036] The belt rotating part 6 includes a round sleeve 601, the round sleeve 601 is connected to the top pin body of the top pin A4, and the end of the round sleeve 601 is provided with a plurality of embedding grooves, the engagement teeth 602 are interference-fitted in the embedding grooves, and the engagement teeth 602 are arranged in an annular array; in this embodiment, the engagement teeth 602 and the round sleeve 601 are detachable, the engagement teeth 602 can be replaced regularly, the round sleeve 601 does not need to be replaced, and the use cost is reduced.

[0037] In addition, the embodiment is completely same as embodiment 1, and details are not repeated here.

[0038] The specific working principle of the utility model is as follows:

[0039] The utility model is used in conjunction with a numerical control machine tool, and the base 1 is installed on the workbench of the machine tool during work.

[0040] For example Figure 5As shown, the operator holds the shaft 10 between the top A4 and the top B5, and the keyway 1001 is placed on the predetermined V-shaped block 702 to make the keyway 1001 face the feed direction of the machine tool spindle box, the tailstock 3 drives the top B5 to move, the top A4 and the top B5 are inserted into the center hole at both ends of the shaft 10, the numerical control machine tool is started, and the remaining actions are completed by the numerical control machine tool and the utility model.

[0041] After starting the numerical control machine tool, the third oil cylinder 902 rotates and presses down after receiving the signal, the positioning pin 901 is inserted into the keyway 1001 for positioning, and then the positioning pin 901 is withdrawn. The spindle of the machine tool spindle box is replaced with a probe to detect the feedback of the keyway 1001, the coordinate center of the probe and the coordinate center of the milling cutter are the same coordinate center, but the actual center of the keyway 1001 of the shaft 10 and the center of the milling cutter are not the same, the purpose of the probe is to find out the deviation between the center of the keyway 1001 of the shaft 10 and the center of the milling cutter and compensate it. After the probe is lowered, it extends into the keyway 1001, the servo motor 202 drives the spindle of the clamp spindle box 201 to work, the shaft 10 rotates in the positive direction, and the keyway 1001 side wall collides with the probe to record an angle value, and then the other side wall of the keyway 1001 collides with the probe to record another value, and then the compensation is calculated and compensated into the program of the numerical control machine tool PLC controller; the PLC controller sends instructions to the servo motor 202, the servo motor 202 drives the shaft 10 to rotate, the keyway 1001 is accurately positioned, and the tool setting information is fed back. After the positioning of the keyway 1001 is completed, the first oil cylinder 801 is extended, the second oil cylinder 803 is rotated and pressed down, and the clamping block 802 and the pressing plate 804 clamp the shaft 10. Then the machine tool spindle box withdraws the probe and replaces the machining milling cutter, mills the keyway 1001 according to the program, and measures the end of the machining.

[0042] The above embodiments are only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any equivalent transformation or modification according to the spirit and essence of the utility model should be covered within the protection scope of the utility model.

Claims

1. A positioning and clamping device for secondary milling of keyways on shaft-type parts, characterized in that: The utility model provides a center lathe, including base (1), the both ends of base (1) are connected with drive mechanism (2) and tailstock (3), drive mechanism (2) is connected with top A (4) on, and tailstock (3) is connected with top B (5) concentric with top A (4), and top A (4) is connected with the rotating part (6) of taking, drive mechanism (2) and tailstock (3) between the base (1) of being connected with support mechanism (7), and the side of support mechanism (7) is connected with clamping mechanism (8), still including the positioning mechanism (9) being connected on base (1), and the positioning mechanism (9) includes elevating piece, and elevating piece is connected with positioning pin (901).

2. The positioning and clamping device for secondary keyway milling of a shaft according to claim 1, characterized in that: The drive mechanism (2) includes the fixture spindle box (201) being connected on the base (1), and the servo motor (202) is driven to be connected on the fixture spindle box (201), the top A (4) is the top of taking elasticity, and the shell of top A (4) is connected on the flange plate of fixture spindle box (201).

3. The positioning and clamping device for secondary keyway milling of a shaft part according to claim 1 or 2, characterized in that: The rotating part (6) includes the round sleeve (601), and the round sleeve (601) is connected on the top body of top A (4), and the end of round sleeve (601) is provided with a plurality of integral interlocking teeth (602), and the interlocking teeth (602) are annular array distribution.

4. The positioning and clamping device for secondary keyway milling of a shaft as set forth in claim 1, wherein: The support mechanism (7) includes two supports (701) being connected on the base (1) in parallel, and the support (701) is located between drive mechanism (2) and tailstock (3), and the support (701) is connected with the pre-positioning V-shaped block (702).

5. The positioning and clamping device for secondary keyway milling of a shaft as set forth in claim 1, wherein: The clamping mechanism (8) includes the first oil cylinder (801) being connected between two supports (701), and the first oil cylinder (801) is vertically arranged, and the power output end of first oil cylinder (801) is connected with the clamping block (802) of V type.

6. The positioning and clamping device for secondary keyway milling of a shaft as set forth in claim 5, wherein: The second oil cylinder (803) is connected on the base (1) of the side of first oil cylinder (801), and the second oil cylinder (803) is the 90 ° angle oil cylinder, and the power output end of second oil cylinder (803) is connected with the pressing plate (804).

7. The positioning and clamping device for secondary keyway milling of a shaft as set forth in claim 1, wherein: The elevating piece is the third oil cylinder (902), and the third oil cylinder (902) is the 90 ° angle oil cylinder, and the base is connected on the third oil cylinder (902), and the slide sleeve (903) is connected on the base, and the positioning pin (901) is slidably fitted in the slide sleeve (903), and the spring is connected between the positioning pin (901) and the slide sleeve (903), and the bottom end of positioning pin (901) is in the form of a hemisphere.

8. The positioning and clamping device for secondary keyway milling of a shaft as set forth in claim 1, wherein: The tailstock (3) is the automatic tailstock (3) of hydraulic drive.

9. The positioning and clamping device for secondary keyway milling of a shaft as set forth in claim 1, wherein: The rotating part (6) includes the round sleeve (601), and the round sleeve (601) is connected on the top body of top A (4), and the end of round sleeve (601) is provided with a plurality of embedding grooves, and the interlocking teeth (602) are interference fitted in the embedding grooves, and the interlocking teeth (602) are annular array distribution.

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