Sewing machine differential tooth grinding groove tooling

Abstract

A differential tooth grinding groove tooling for a sewing machine, comprising a fixture base, a left vertical clamping block, a right vertical clamping block, a top block, a horizontal adjustment disc and a vertical adjustment disc. A horizontal adjustment disc is arranged on the left end face of the fixture base, and this horizontal adjustment disc is used to drive the left vertical clamping block at the left end face of the fixture base and the right vertical clamping block inside the corresponding fixture base to approach or move away from each other. A vertical adjustment disc is arranged on the right side of the fixture base, and this vertical adjustment disc drives the vertical top block arranged inside the fixture base to rise or fall, and the upper end of this top block is located in an opening groove arranged in alignment with the upper end of the fixture base; when the left vertical clamping block and the right vertical clamping block approach each other, they can clamp both sides of the vertical end of the workpiece to be processed, and when the top block rises, it can press against the bottom surface of the horizontal end of the workpiece to be processed. In the present invention, the upper end of the workpiece is fixed by the vertical clamping block, and the lower end of the workpiece is fixed by the limiting plate and the top block, so as to achieve no defective products in batch processing of the workpiece.

Description

Technical Field

[0001] The invention belongs to the technical field of improved structure of a groove grinding tool, in particular to a differential tooth groove grinding tool for a sewing machine. Background Art

[0002] The differential tooth is a component in a sewing machine, and its shape is roughly a vertical end 6, a forward-inclined connecting part 7 and a transverse end 9. The vertical end, the connecting part and the transverse end are connected as a whole. When the workpiece is processed, a groove 5 needs to be ground longitudinally on the upper end surface of the vertical end. Since it has the above three shapes, it is very difficult to fix on the machine tool. Generally, multiple clamps are used for fixing. Not only is the operation cumbersome, but also the workpiece is prone to shaking due to the force during the grinding process, resulting in problems with the size or position of the workpiece groove, resulting in the scrapping of the workpiece, and the defective rate is extremely high during batch processing. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a sewing machine differential tooth grinding groove tooling that fixes the upper end of the workpiece by a vertical clamping block and fixes the lower end of the workpiece by a limit plate and a top block, thereby realizing batch processing of workpieces without defective products.

[0004] The technical solution adopted by the present invention is:

[0005] A sewing machine differential tooth grinding groove tooling, characterized in that it includes a clamp seat, a left vertical clamp block, a right vertical clamp block, a top block, a horizontal adjustment disk and a vertical adjustment disk, a horizontal adjustment disk is arranged on the left end surface of the clamp seat, the horizontal adjustment disk is used to drive the left vertical clamp block at the left end surface of the clamp seat and the right vertical clamp block inside the clamp seat to move closer to or away from each other, a vertical adjustment disk is arranged on the right side of the clamp seat, the vertical adjustment disk drives the vertical top block arranged in the clamp seat to rise or fall, and the upper end of the top block is located in an open groove arranged in a position on the upper end of the clamp seat;

[0006] The left vertical clamp block and the right vertical clamp block can clamp both sides of the vertical end of the workpiece to be processed when they are close to each other, and the top block can press against the bottom surface of the horizontal end of the workpiece to be processed when it rises.

[0007] Furthermore, an upper slide groove is arranged on the top surface of the open groove, and the upper end of a limit plate is arranged in the upper slide groove, and the lower end of the limit plate can be embedded in the lower slide groove of the upper end surface of the transverse end of the workpiece to be processed.

[0008] Furthermore, a longitudinal vertical slot is provided at the upper left end of the fixture base. A left vertical clamping block is provided on the left end face of the fixture base on the left side of the vertical slot. A jack is provided at the upper end of the inner surface of the left vertical clamping block. The jack passes through the left side wall of the vertical slot and extends into the vertical slot. A horizontal adjustment disc is provided on the outer surface of the middle part of the left vertical clamping block. The horizontal adjustment disc is connected to a transverse screw rod. The right end of the screw rod sequentially passes through the left vertical clamping block and the left side wall of the vertical slot and then extends into a clamping block groove provided on the right side wall of the vertical slot and is meshed and connected with a right vertical clamping block provided in the clamping block groove. Guide posts are provided at the lower ends of the left vertical clamping block and the right vertical clamping block.

[0009] The lower end of the vertical adjustment disc extending into the right side of the fixture base contacts one end of a cam or a lever provided in the fixture base in alignment. The other end of the cam or the lever contacts the bottom surface of the top block.

[0010] The advantages and positive effects of the present invention are:

[0011] In the present invention, the left vertical clamping block and the right vertical clamping block approach each other under the drive of the horizontal adjustment disc and clamp the vertical end of the workpiece to be processed. The open slot, the limit plate and the top block at the upper right end of the fixture base clamp the cross beam end of the workpiece to be processed. The fixture base itself is integrally fixed on the machine tool, providing the stability of the overall structure. Since the groove on the upper end surface of the vertical end is in the longitudinal direction, when the tool works, a longitudinal external force is generated on the vertical end. However, due to the combined action of the open slot, the limit plate and the top block on the transverse end, the workpiece to be processed is kept stable in the longitudinal direction, the groove is processed precisely, and there are no defective products caused by the shaking of the workpiece to be processed during batch product processing. Description of the Drawings

[0012] Figure 1 is a structural schematic diagram of the present invention;

[0013] Figure 2 is Figure 1 the sectional view taken along the line A-A of

[0014] Figure 3 is Figure 1 the three-dimensional view of Detailed Embodiment

[0015] The following further illustrates the present invention in conjunction with embodiments. The following embodiments are illustrative and not restrictive, and the protection scope of the present invention cannot be limited by the following embodiments.

[0016] A grinding groove tool for the differential feed dog of a sewing machine, as Figures 1 to 3As shown in the figure, the innovation of the present invention lies in: it includes a fixture base 26, a left vertical clamping block 2, a right vertical clamping block 29, a top block 20, a horizontal adjustment disk 1 and a vertical adjustment disk 15. A horizontal adjustment disk is arranged on the left end face of the fixture base, and this horizontal adjustment disk is used to drive the left vertical clamping block at the left end face of the fixture base and the right vertical clamping block inside the corresponding fixture base to approach or move away from each other. A vertical adjustment disk is arranged on the right side of the fixture base, and this vertical adjustment disk drives the vertical top block arranged inside the fixture base to rise or fall. The upper end of this top block is located in an opening groove 17 arranged corresponding to the upper end 18 of the fixture base; when the left vertical clamping block and the right vertical clamping block approach each other, they can clamp both sides of the vertical end 6 of the workpiece to be processed, and when the top block rises, its upper surface 19 can press against the bottom surface of the horizontal end 9 of the workpiece to be processed.

[0017] In this embodiment, an upper sliding groove 11 is arranged on the inner top surface of the opening groove, and the upper end 10 of a limiting plate 12 is arranged in this upper sliding groove. The lower end of this limiting plate can be embedded in a lower sliding groove 13 on the upper end surface of the horizontal end of the workpiece to be processed.

[0018] A longitudinal vertical opening groove 31 is arranged at the upper left side of the fixture base. The left vertical clamping block is arranged on the left end face of the fixture base on the left side of this vertical opening groove. The upper end of the inner surface of the left vertical clamping block is provided with a top column 3, and this top column passes through the left side wall 4 of the vertical opening groove and then extends into the vertical groove. A horizontal adjustment disk is arranged on the outer surface of the middle part of the left vertical clamping block, and this horizontal adjustment disk is connected to a horizontal screw rod 27. The right end of this screw rod sequentially passes through the left vertical clamping block and the left side wall of the vertical opening groove and then extends into a clamping block groove 30 arranged corresponding to the right side wall 8 of the vertical opening groove and is meshed and connected with the right vertical clamping block arranged in this clamping block groove. Guide columns 28 are arranged at the lower ends of the left vertical clamping block and the right vertical clamping block to ensure that the left vertical clamping block and the right vertical clamping block can approach or move away from each other smoothly.

[0019] The screw rod 16 at the bottom surface of the vertical adjustment disk extends into the lower end 21 inside the right side 14 of the fixture base and contacts one end of a cam or a lever arranged corresponding to the inside of the fixture base, and the other end of this cam or lever contacts the bottom surface of the top block. The preferred solution is: a lever 23 is arranged inside the fixture base. This lever has a rotation shaft 24, the right end 22 contacts the lower end of the vertical adjustment disk, and the left end 25 contacts the bottom surface of the top block.

[0020] The working process of the present invention is as follows:

[0021] 1. Loosen the horizontal adjustment disk and the vertical adjustment disk, remove the limiting plate, place the vertical end of the workpiece to be processed into the vertical opening groove, and place the horizontal end into the opening groove.

[0022] 2. Insert the limiting plate into the upper sliding groove and the lower sliding groove, adjust the longitudinal position of the workpiece to be processed, tighten the vertical adjustment disk, and press the horizontal end tightly in the opening groove.

[0023] 3. Tighten the horizontal adjustment disk, rotate the screw rod, make the left vertical clamping block and the right vertical clamping block approach each other and clamp the vertical end of the workpiece to be processed, and complete the fixation of the workpiece to be processed.

[0024] In the present invention, the left vertical clamping block and the right vertical clamping block on the left side of the fixture base approach each other under the drive of the horizontal adjustment disc and clamp the vertical end of the workpiece to be machined, and the open slot, the limiting plate and the top block at the upper end on the right side of the fixture base clamp the cross beam end of the workpiece to be machined. The fixture base itself is integrally fixed on the machine tool, providing the stability of the overall structure. Since the groove on the upper end surface of the vertical end is in the longitudinal direction, when the tool is working, a longitudinal external force is generated on the vertical end. However, due to the combined action of the open slot, the limiting plate and the top block on the transverse end, the workpiece to be machined is kept stable in the longitudinal direction, the groove is machined precisely, and there are no defective products caused by the shaking of the workpiece to be machined during the processing of batch products.

[0025] In the present invention, the left vertical clamping block and the right vertical clamping block approach each other under the drive of the horizontal adjustment disc and clamp the vertical end of the workpiece to be machined, and the open slot, the limiting plate and the top block at the upper end on the right side of the fixture base clamp the cross beam end of the workpiece to be machined. The fixture base itself is integrally fixed on the machine tool, providing the stability of the overall structure. Since the groove on the upper end surface of the vertical end is in the longitudinal direction, when the tool is working, a longitudinal external force is generated on the vertical end. However, due to the combined action of the open slot, the limiting plate and the top block on the transverse end, the workpiece to be machined is kept stable in the longitudinal direction, the groove is machined precisely, and there are no defective products caused by the shaking of the workpiece to be machined during the processing of batch products.

Claims

1. A clamping and positioning method for a differential tooth grinding groove tooling of a sewing machine, characterized in that: It includes a fixture base, a left vertical clamping block, a right vertical clamping block, a top block, a horizontal adjustment disc and a vertical adjustment disc. A horizontal adjustment disc is arranged on the left end face of the fixture base, and this horizontal adjustment disc is used to drive the left vertical clamping block at the left end face of the fixture base and the right vertical clamping block inside the fixture base in alignment to approach or move away from each other. A vertical adjustment disc is arranged on the right side of the fixture base, and this vertical adjustment disc drives the vertical top block arranged inside the fixture base to rise or fall. The upper end of this top block is located in an opening groove arranged in alignment at the upper end of the fixture base; When the left vertical clamping block and the right vertical clamping block approach each other, they can clamp both sides of the vertical end of the workpiece to be processed. When the top block rises, it can press against the bottom surface of the horizontal end of the workpiece to be processed; An upper sliding groove is arranged on the top surface inside the opening groove, and the upper end of a limiting plate is arranged in this upper sliding groove. The lower end of this limiting plate can be embedded in the lower sliding groove on the upper end surface of the horizontal end of the workpiece to be processed; A longitudinal vertical slot is arranged at the upper left end of the fixture base. The left vertical clamping block is arranged on the left end face of the fixture base to the left of this vertical slot. A top column is arranged at the upper end of the inner surface of the left vertical clamping block. This top column passes through the left side wall of the vertical slot and then extends into the vertical slot. A horizontal adjustment disc is arranged on the outer surface of the middle part of the left vertical clamping block. This horizontal adjustment disc is connected to a horizontal screw rod. The right end of this screw rod sequentially passes through the left vertical clamping block and the left side wall of the vertical slot and then extends into the clamping block slot arranged in alignment at the right side wall of the vertical slot and meshes with the right vertical clamping block arranged in this clamping block slot. Guide columns are arranged at the lower ends of the left vertical clamping block and the right vertical clamping block; The clamping and positioning method for the differential tooth grinding groove tooling of the sewing machine includes the following steps: S1. Loosen the horizontal adjustment disc and the vertical adjustment disc, remove the limiting plate, place the vertical end of the workpiece to be processed into the vertical slot, and place the horizontal end into the opening groove; S2. Insert the limiting plate into the upper sliding groove and the lower sliding groove, adjust the longitudinal position of the workpiece to be processed, tighten the vertical adjustment disc, and press the horizontal end tightly in the opening groove; S3. Tighten the horizontal adjustment disc to make the screw rod rotate, move the left vertical clamping block and the right vertical clamping block closer to each other and clamp the vertical end of the workpiece to be processed to complete the fixation of the workpiece to be processed.

2. The clamping and positioning method for a differential tooth grinding groove tooling of a sewing machine according to claim 1, characterized in that: The lower end of the vertical adjustment disc extending into the right side inside the fixture base contacts one end of a cam or a lever arranged in alignment inside the fixture base, and the other end of this cam or lever contacts the bottom surface of the top block.

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