A core shaft positioning mechanism for a high-precision watch hairspring winding machine

Abstract

The present invention discloses a spindle positioning mechanism for a high-precision hairspring winding machine for watches, comprising a nozzle core sleeve, a locking nut, a winding spindle and a spindle nozzle; a spindle nozzle is fixed on the outer peripheral surface of the winding spindle body, the outer cone surface of the spindle nozzle and the inner cone of the nozzle core sleeve are matched and combined to position the winding spindle, and the locking nut locks the nozzle core sleeve. The beneficial effect is that, due to the use of the spindle clamping positioning reference, the structure is rigorous and reasonable, and the purpose of improving the hairspring winding accuracy is achieved; in particular, the outer cone surface of the standard nozzle corresponds to the inner cone hole of the bearing sleeve as the positioning reference, the nut only plays a locking role and does not participate in positioning, and the nut locking and nozzle axis positioning separation structure is adopted, so that the nozzle positioning cone surface and the locking thread do not interfere with each other, thereby ensuring the accuracy of the spindle locking positioning, while reducing the wear of the spindle.

Description

Technical Field

[0001] The invention relates to a hairspring winding machine, and in particular to a central shaft positioning mechanism of a high-precision hairspring winding machine used for winding and forming a watch hairspring. Background Art

[0002] The coiling of watch hairsprings is an important process in the production of watch hairsprings, and the coiling machine used is the key equipment for hairspring forming. It determines the coiling quality of the hairspring, especially the rotation accuracy (radial runout) of the forming mandrel, which directly affects the qualified rate of the product. The coiling process is prone to cause deformation of the inner diameter of the hairspring, collapse of the hole, uneven wear of the forming mandrel resulting in excessive roundness of the hairspring, excessive consumption of the mandrel, etc., which have a great impact on the quality and consumption of hairspring products.

[0003] Figure 1 It is a structural schematic diagram of an existing hairspring winding forming machine. Figure 2a This is a schematic diagram of the local structure of the existing wire coiling machine locking and positioning. Figure 2b It is the center of deformation and offset of the nozzle after uneven force. The winding mandrel is spun on the outer conical surface of the nozzle through a locking nut with an inner conical surface. Due to the combined errors that are inevitably produced in the process of the locking nut and the nozzle, the concentricity of the thread and the conical surface does not meet the requirements, resulting in uneven force on the conical surface of the nozzle during locking (uneven elastic deformation of the nozzle), and the phenomenon of mutual interference between locking and positioning occurs, which results in the deviation of the mandrel center. The deviation of the mandrel center is the main reason affecting the winding accuracy of the hairspring. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a core shaft positioning mechanism in a hairspring winding forming machine which has accurate core shaft positioning, is not prone to core shaft center deviation, has reliable precision and a rigorous structure.

[0005] The technical solution adopted by the present invention is a spindle positioning mechanism for a high-precision watch hairspring winding machine, including a nozzle core sleeve, a locking nut, a winding spindle and a spindle nozzle; a spindle nozzle is fixed to the outer peripheral surface of the winding spindle body, the outer cone surface of the spindle nozzle and the inner cone of the nozzle core sleeve are matched to position the winding spindle, and the locking nut locks the nozzle core sleeve.

[0006] The nozzle core sleeve is placed in the bearing inner sleeve, the compression spring is placed in the bottom shaft of the nozzle core sleeve, the stripping handle and the connecting sleeve are screwed into the bottom screw of the nozzle core sleeve, the core shaft nozzle is placed in the nozzle core sleeve, the locking nut is screwed into the upper end thread of the nozzle core sleeve, the stripping core shaft group is placed in the core shaft nozzle, the winding core shaft is placed in the core shaft nozzle hole, and the winding base is placed on the head of the winding core shaft.

[0007] The top end of the mandrel clamping nozzle is an arc surface.

[0008] When the locking nut and the nozzle core sleeve are locked, there is line contact.

[0009] The center of the mandrel nozzle is a circular hole, and the cone portion of the mandrel nozzle is evenly divided into 3-6 parts, providing a variable space for the change of the inner diameter of the cone portion at the upper end of the mandrel nozzle.

[0010] When the upper conical surface of the mandrel clamping nozzle is not tightened, the outer diameter of the mandrel clamping nozzle is larger than the inner diameter of the inner conical surface of the clamping nozzle core sleeve.

[0011] The inner diameter of the top end of the locking nut is clearance-matched with the wire coiling core shaft.

[0012] The beneficial effect of the present invention is that, due to the use of the core shaft mounting positioning reference, the structure is rigorous and reasonable, and the purpose of improving the winding accuracy of the hairspring is achieved; in particular, the outer cone surface of the standard nozzle corresponds to the inner cone hole of the bearing sleeve as the positioning reference, the nut only plays a locking role and does not participate in the positioning, and the nut locking and nozzle axial positioning separation structure is adopted, so that the nozzle positioning cone surface and the locking thread do not interfere with each other, thereby ensuring the accuracy of the core shaft locking positioning and reducing the wear of the core shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the existing wire coiling machine;

[0014] Figure 2a and Figure 2b It is a schematic diagram and a partial top view of the locking and positioning local structure of the existing wire coiling machine;

[0015] Figure 3 It is a structural schematic diagram of the wire coiling machine of the present invention;

[0016] Figure 4a and Figure 4b It is a schematic diagram and a partial top view of the locking and positioning local structure of the wire coiling machine of the present invention.

[0017] In the figure:

[0018] 1. Main body fixing sleeve 2. Adjustment bearing sleeve 3. Adjustment sleeve lock nut

[0019] 4. Adjustment sleeve cover 5. Nozzle core sleeve 6. Locking nut

[0020] 7. Bearing inner sleeve 8. Pulley 9. Stripping handle

[0021] 10.Connecting sleeve 11.Inner sleeve 12.Fixed plate

[0022] 13. Base fixing plate 14. Wire coil mandrel 15. Mandrel clamp

[0023] 16. Wire coil base 17. Stripping mandrel assembly 18. Bearing

[0024] 19. Compression spring 20. Cross pin. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0026] like Figure 3 As shown, the present invention is a spindle positioning mechanism of a high-precision watch hairspring winding machine, comprising a nozzle core sleeve 5, a locking nut 6, a winding spindle 14 and a spindle nozzle 15; the spindle nozzle 15 is fixed to the outer peripheral surface of the main body of the winding spindle 14, the outer cone surface of the spindle nozzle 15 is matched with the inner cone of the nozzle core sleeve 5 to position the winding spindle 14, and the locking nut 6 locks the nozzle core sleeve 5.

[0027] The bearing 18 is mounted in the hole of the adjusting bearing sleeve 2, the bearing inner sleeve 7 is mounted in the inner hole of the bearing 18, the adjusting sleeve cover 4 is installed at the bottom of the adjusting bearing sleeve 2 and fastened with screws, the nozzle core sleeve 5 is installed in the hole of the bearing inner sleeve 7, the cross pin 20 is installed in the cross hole of the bearing inner sleeve 7, the compression spring 19 is installed in the bottom axis of the nozzle core sleeve 5, the inner sleeve 11 is pressed into the bottom hole of the bearing inner sleeve 7, the pulley 8 is installed in the bottom platform of the bearing inner sleeve 7, the connecting sleeve 10 is pressed into the hole of the stripping handle 9, and then the stripping handle 9 together with the connecting sleeve 10 is screwed into the screw at the bottom of the nozzle core sleeve 5, the spindle nozzle 15 is installed in the hole of the nozzle core sleeve 5, the locking nut 6 is screwed into the thread on the upper end of the nozzle core sleeve 5, the stripping spindle group 17 is installed in the hole of the spindle nozzle 15, and the wire is coiled. The spindle 14 is installed in the hole of the spindle nozzle 15, and the locking nut 6 is tightened to fix the wire winding spindle 14. The adjusting bearing sleeve 2 is screwed into the main body fixing sleeve 1 together with the above components. At this time, the main body fixing sleeve 1 is fixed as a whole on the work table with bolts, the fixing plate 12 is installed in the table hole of the fixing sleeve 1 and fixed with screws, the wire winding base 16 is installed on the head of the wire winding spindle 14, and the base fixing plate 13 is installed in the table hole of the fixing plate 12 and the wire winding base 16 is fixed with screws. At this time, the movement assembly of the high-precision hairspring winding machine is completed, and then the thread height of the adjusting bearing sleeve 2 is adjusted to achieve the reasonable position (according to product requirements) of the wire winding spindle 14 and the wire winding base 16, and then the assembled movement is fixed by tightening the adjusting sleeve locking nut 3 to enter the working state.

[0028] like Figures 3 to 4bAs shown, the tapered hole of the nozzle core sleeve 5 is used as the positioning reference of the core shaft nozzle 15; the top of the core shaft nozzle 15 is designed with an arc surface, and the arc surface makes the force on the top end as vertical as possible, and utilizes the free clearance of the thread. When the locking nut 6 is screwed downward, the inner end of its hole is in linear contact with the top of the core shaft nozzle 15, avoiding the uncertainty of the force point of mutual surface contact, which causes the core shaft nozzle 15 to be tilted and stressed. When the locking nut 6 and the nozzle core sleeve 5 are locked with each other, there is a linear contact between the core shaft nozzle 15 and the locking nut 6, and the force is more uniform, ensuring that the center position of the wire winding core shaft 14 is not disturbed, thereby meeting the technical requirements of the product and extending the service life of the wire winding core shaft 14. The product qualification rate reaches 98%, the wear of the wire winding core shaft 14 is reduced, and the consumption is reduced by 50%, which has achieved obvious expected results.

[0029] like Figure 4a and Figure 4b As shown, the center of the mandrel nozzle 15 is a circular hole, which cooperates with the wire winding mandrel 14, and the cone portion of the mandrel nozzle 15 is evenly divided into 3-6 parts to provide variable space for the change of the inner diameter of the cone portion at the upper end of the mandrel nozzle 15.

[0030] In the initial state, the cone at the top of the mandrel clamp 15 is open and relaxed, and has a clearance fit with the wire winding mandrel 14. When the position of the wire winding mandrel 14 is adjusted and needs to be fixed, the locking nut 6 is rotated to move it downward along the external thread of the clamp core sleeve 5. The inner wall of the upper end surface of the locking nut 6 presses the mandrel clamp 15 downward, so that it moves downward along the inner conical surface of the clamp core sleeve 5, and then the upper conical surface of the mandrel clamp 15 holds the wire winding mandrel 14 tightly, fixing and positioning it. Compared with the existing technology, the positioning accuracy is significantly improved.

[0031] It is worth mentioning that the upper conical surface of the mandrel clamping nozzle 15 should be evenly divided to ensure uniform deformation, uniform force on the wire winding mandrel 14, and accurate positioning.

[0032] The outer diameter of the upper conical surface of the mandrel clamping nozzle 15 is larger than the inner diameter of the inner conical surface of the clamping nozzle core sleeve 5 when in a relaxed state, and the upper conical surface of the mandrel clamping nozzle 15 can be pressed by the inner conical surface of the clamping nozzle core sleeve 5. The inner diameter of the top end of the locking nut 6 is clearance-matched with the winding mandrel 14.

[0033] The working process of this core shaft positioning mechanism is: place the wire winding mold selected according to the specifications on the wire winding base 16, then store the hairspring strip material selected according to the specifications in the groove of the wire winding core shaft 14, and press the wire pressing cap according to the specifications into the wire winding mold. At this time, start the foot-operated drive control switch, and connect the pulley 8 with the drive motor to rotate the wire winding core shaft 14, and wind the hairspring strip material into the wire winding mold, and then pull the stripping handle 9 to separate the wire winding mold together with the wound hairspring from the wire winding core shaft 14, and now a working cycle is completed.

[0034] The present invention improves the accuracy of the winding machine by improving the positioning method of the core shaft, uses the outer cone surface of the standard nozzle corresponding to the inner cone hole of the bearing sleeve as the positioning reference, and the nut only plays a locking role and does not participate in positioning. The nut locking and nozzle axial positioning separation structure is adopted, so that the nozzle positioning cone surface and the locking thread do not interfere with each other, thereby ensuring the accuracy of the core shaft locking positioning, while reducing the wear of the core shaft, and achieving the purpose of high-precision hairspring winding and forming.

[0035] It is worth pointing out that the protection scope of the present invention is not limited to the above-mentioned specific examples. According to the basic technical concept of the present invention, the purpose of the present invention can also be achieved with basically the same structure. As long as ordinary technicians in this field can think of any implementation method without creative work, it belongs to the protection scope of the present invention.

Claims

1. A spindle positioning mechanism for a high-precision watch hairspring winding machine, characterized in that: The invention comprises a nozzle core sleeve (5), a locking nut (6), a wire winding mandrel (14) and a mandrel nozzle (15); the mandrel nozzle (15) is fixed to the outer peripheral surface of the main body of the wire winding mandrel (14); the top end of the mandrel nozzle (15) is an arc-shaped surface, the outer conical surface of which is matched with the inner cone of the nozzle core sleeve (5) to position the wire winding mandrel (14); the locking nut (6) locks the nozzle core sleeve (5); when the locking nut (6) and the nozzle core sleeve (5) are locked with each other, the mandrel nozzle (15) and the locking nut (6) are in line contact.

2. The core shaft positioning mechanism of the high-precision watch hairspring winding machine according to claim 1 is characterized in that: The nozzle core sleeve (5) is placed in the bearing inner sleeve (7), the compression spring (19) is placed in the bottom shaft of the nozzle core sleeve (5), the stripping handle (9) and the connecting sleeve (10) are screwed into the bottom screw of the nozzle core sleeve (5), the mandrel nozzle (15) is placed in the nozzle core sleeve (5), the locking nut (6) is screwed into the upper thread of the nozzle core sleeve (5), the stripping mandrel assembly (17) is placed in the mandrel nozzle (15), the wire winding mandrel (14) is placed in the mandrel nozzle (15) hole, and the wire winding base (16) is placed on the head of the wire winding mandrel (14).

3. The core shaft positioning mechanism of the high-precision watch hairspring winding machine according to claim 1 is characterized in that: The center of the mandrel clamp (15) is a circular hole, and the conical portion of the mandrel clamp (15) is evenly divided into 3-6 parts, providing a variable space for the change of the inner diameter of the conical portion at the upper end of the mandrel clamp (15).

4. The core shaft positioning mechanism of the high-precision watch hairspring winding machine according to claim 1 is characterized in that: When the upper conical surface of the mandrel clamping nozzle (15) is not tightened, the outer diameter of the mandrel clamping nozzle (15) is larger than the inner diameter of the inner conical surface of the clamping nozzle core sleeve (5).

5. The core shaft positioning mechanism of the high-precision watch hairspring winding machine according to claim 1, characterized in that: The inner diameter of the top end of the locking nut (6) is clearance-matched with the wire coiling core shaft (14).

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